A tube furnace sampling device and tube furnace sampling method for metal pipe detection

Abstract

The application discloses a pipe furnace sample feeding device for metal pipe detection, a rotating disc is installed on a base through a rotating shaft and can be lifted and rotated, a guide support extends around the rotating shaft and has an annular guide surface extending around the rotating shaft, a step structure is formed at the connection between a guide section and a reset section of the annular guide surface, and a guide part of the annular guide surface is arranged on the side wall of the rotating shaft; a handle column of the rotating disc drives a sliding rod to move through a waist-shaped sliding groove, and a limiting mechanism guides the sliding rod through a horizontally extending guide groove. Through the above-mentioned optimized pipe furnace sample feeding device, a pipe feeding part corresponding to a heating area of the pipe furnace is arranged on the sliding rod, the metal pipe is accurately fed to the heating area in the pipe furnace through the movement of the sliding rod, sample feeding and unloading are realized, and the sliding rod is reset, so that the problems of poor visibility, difficult operation and inaccurate sample loading position of the pipe furnace are effectively solved. The application further provides a pipe furnace sample feeding method.

Description

A tubular furnace sampling device and method for testing metal pipes. Technical Field

[0001] This invention relates to the field of metal pipe testing technology, and in particular to a tubular furnace sampling device and method for metal pipe testing. Background Technology

[0002] Residual carbon film is a significant cause of corrosion and leakage in copper alloy heat exchange tubes during use. The power industry standard DL / T 712-2010, "Guidelines for Material Selection of Condenser and Auxiliary Equipment Cooler Tubes in Power Plants," stipulates that there should be no carbon film on the inner surface of copper and copper alloy tubes, as carbon film can cause severe electrochemical corrosion. Among the methods for determining carbon film on copper and copper alloy tubes, the combustion method has advantages such as high sensitivity, wide detection range, and simplicity, making it the most suitable method for determining carbon film on the inner surface of copper pipe fittings.

[0003] The process of determining the carbon content on the inner surface of copper and copper alloy pipe fittings using the combustion method involves heating the copper pipe or fitting sample to a certain temperature in an oxygen stream, burning off the carbon present on its inner wall. The carbon dioxide produced is then measured using infrared absorption spectroscopy, the tetrabutylamine method, or the coulometric method to determine the carbon content. The instrument used in the combustion experiment is a tube furnace heating-infrared carbon-sulfur analyzer, and the combustion process takes place within a quartz tube. The characteristics of this instrument are: the quartz tube has a small diameter but a long length, and the quartz tube is completely enclosed within the tube furnace, making the sample loading process completely unobservable. The effective heating distance of the tube furnace is inherent to the equipment and is only located in the central area within the furnace. Therefore, before conducting the combustion experiment, the sample to be tested must be loaded into the effective heating area along the narrow quartz tube; otherwise, the effective heating temperature will be insufficient, leading to incomplete combustion of carbon on the inner surface of the sample and affecting the accuracy of the test results. Summary of the Invention

[0004] To address the technical problems existing in the background art, the present invention proposes a tubular furnace sampling device and a tubular furnace sampling method for metal pipe testing.

[0005] The present invention provides a tubular furnace sampling device for metal pipe testing, comprising: a base, a guide support, a rotating disk, a sliding rod, and a limiting mechanism;

[0006] A rotating disk is located above the base. The bottom of the rotating disk has a pivot shaft, allowing it to be raised, lowered, and rotated on the base. A guide support is mounted on the base and extends around the pivot shaft. The top of the guide support has an annular guide surface extending around the pivot shaft.

[0007] It includes a guide section and a reset section connected end to end. The guide section and the reset section are smoothly connected at one end and form a stepped structure at the other end. The side wall of the rotating shaft is provided with a guide part that cooperates with the annular guide surface.

[0008] The limiting mechanism is set on the base and located on one side of the stepped structure of the spiral support. The limiting mechanism is provided with a guide groove that extends horizontally along the radial direction of the rotating disk.

[0009] The top of the rotating disk is provided with a vertically extending handle post. The sliding rod is located above the rotating disk and can be slidably installed in the guide groove. The outer wall of the sliding rod is provided with a positioning block. The positioning block forms a sliding part and a feeding part on the sliding rod respectively located on both sides of the positioning block. The sliding part is provided with a waist-shaped groove that slides with the handle post. The waist-shaped groove extends perpendicular to the extension direction of the sliding rod.

[0010] Preferably, the guide section of the annular guide surface is located on a horizontal plane, and the reset section of the annular guide surface gradually rises in a direction away from the stepped structure.

[0011] Preferably, the limiting mechanism includes an L-shaped connecting rod, the guide groove is located at one end of the vertical rod of the L-shaped connecting rod, and one end of the horizontal rod of the L-shaped connecting rod is rotatably mounted on a rotating shaft.

[0012] Preferably, the limiting mechanism further includes a limiting seat, which is mounted on the base and has a U-shaped limiting groove extending downward from the top. The crossbar of the L-shaped connecting rod is located within the U-shaped limiting groove.

[0013] Preferably, the guide portion of the rotating shaft includes a screw and a roller, the roller being mounted on the rotating shaft by a horizontally arranged screw and rollingly engaging with the guide surface.

[0014] Preferably, it also includes a stop pin, and the end of the screw away from the rotating shaft is provided with a vertical through mounting hole, and the base is provided with a limiting hole corresponding to the mounting hole, and one end of the stop pin passes through the mounting hole and is inserted into the limiting hole.

[0015] Preferably, it also includes a baffle plate, one end of which has a U-shaped opening and is mounted on the sliding rod through the U-shaped opening. The baffle plate is located on the side of the positioning block away from the sliding part.

[0016] In this invention, the proposed tubular furnace sample feeding device for metal pipe testing features a rotating disc mounted on a base, which can be raised and lowered rotatably via a rotating shaft. A guide support extends around the rotating shaft and has an annular guide surface extending around the shaft at its top. The guide section and reset section of the annular guide surface form a stepped structure at their connection. The side wall of the rotating shaft has a guide portion that mates with the annular guide surface. The handle column of the rotating disc drives a sliding rod to move via a waist-shaped sliding groove, and a limiting mechanism guides the sliding rod via a horizontally extending guide groove. Through this optimized design, the tubular furnace sample feeding device features a tube delivery section on the sliding rod corresponding to the heating zone of the tubular furnace. The movement of the sliding rod accurately delivers the metal pipe to the heating zone inside the tubular furnace, achieving sample delivery and unloading, while simultaneously returning to the reset position. This effectively solves the problems of difficult furnace loading operations and inaccurate sample placement in tubular furnaces.

[0017] The present invention also proposes a tubular furnace injection method using the above-mentioned tubular furnace injection device for metal pipe testing, comprising the following steps:

[0018] S1. Place one end of the metal tube outside the tube feeding part of the sliding rod and on the side of the positioning block away from the sliding part. Place the sample feeding device on the side of the quartz tube opening of the tube furnace, so that the metal tube is inside the quartz tube and the positioning block is at the quartz tube opening.

[0019] S2. By rotating the rotating disk through the handle column, the guide part of the rotating shaft rotates along the guide section to the stepped structure and then returns to the initial position through the reset section, driving the sliding rod to send the metal tube into the heating area inside the quartz tube and then back.

[0020] Preferably, in S1, before placing the sample introduction device on the side of the quartz tube opening of the tube furnace, the baffle is installed on the sliding rod so that it is located on the side of the positioning block away from the sliding part and abuts against the positioning block;

[0021] Specifically, the metal tube is positioned inside the quartz tube and the positioning block is positioned at the opening of the quartz tube, meaning that the metal tube is positioned inside the quartz tube and the side of the baffle away from the positioning block abuts against the opening end of the quartz tube.

[0022] Before S2, remove the baffle.

[0023] Preferably, before S1, the rotating disk is pre-positioned by a stop pin; after S1, the stop pin is removed.

[0024] The tubular furnace sampling method proposed in this invention has similar technical effects to the tubular furnace sampling device for metal pipe testing mentioned above, so it will not be described in detail here. Attached Figure Description

[0025] Figure 1 is a schematic diagram of one embodiment of a tubular furnace sampling device for metal pipe testing proposed in this invention.

[0026] Figure 2 is a schematic diagram of a metal tube being mounted on a sliding rod in one embodiment of a tubular furnace sampling device for metal tube testing proposed in this invention.

[0027] Figure 3 is a schematic diagram of the initial state of a metal tube placed inside a quartz tube in one embodiment of a tubular furnace sampling device for metal tube testing proposed in this invention.

[0028] Figure 4 is a schematic diagram of the heating position of the metal tube being fed into the quartz tube in one embodiment of the tubular furnace sampling device for metal tube testing proposed in this invention.

[0029] Figure 5 is a schematic diagram of the state where the metal tube is removed and the sliding rod returns to its original position in one embodiment of the tubular furnace sampling device for metal tube testing proposed in this invention.

[0030] Figure 6 is a partial structural diagram of the cooperation between the rotating shaft and the guide support in one embodiment of the tubular furnace sampling device for metal pipe testing proposed in this invention. Detailed Implementation

[0031] As shown in Figures 1 to 6, Figure 1 is a structural schematic diagram of one embodiment of the tubular furnace sampling device for metal tube testing proposed in this invention; Figure 2 is a schematic diagram of the metal tube being installed on the sliding rod in one embodiment of the tubular furnace sampling device for metal tube testing proposed in this invention; Figure 3 is a schematic diagram of the initial state of the metal tube being placed inside the quartz tube in one embodiment of the tubular furnace sampling device for metal tube testing proposed in this invention; Figure 4 is a schematic diagram of the heating position of the metal tube being fed into the quartz tube in one embodiment of the tubular furnace sampling device for metal tube testing proposed in this invention; Figure 5 is a schematic diagram of the state of the metal tube being removed and the sliding rod returning in one embodiment of the tubular furnace sampling device for metal tube testing proposed in this invention; and Figure 6 is a partial structural schematic diagram of the cooperation between the rotating shaft and the guide support in one embodiment of the tubular furnace sampling device for metal tube testing proposed in this invention.

[0032] Referring to Figure 1, the present invention proposes a tubular furnace sampling device for metal pipe testing, comprising: a base 1, a guide support 2, a rotating disk 3, a sliding rod 4, and a limiting mechanism;

[0033] The rotating disk 3 is located above the base 1. The bottom of the rotating disk 3 is provided with a rotating shaft 5 and can be raised and lowered and rotated on the base 1 through the rotating shaft 5. The guide support 2 is provided on the base 1 and extends around the rotating shaft 5. The top of the guide support 2 has an annular guide surface extending around the rotating shaft 5. The annular guide surface includes a guide section 21 and a reset section 22 connected end to end. The guide section 21 and the reset section 22 are smoothly connected at one end and form a stepped structure at the other end. The side wall of the rotating shaft 5 is provided with a guide part that cooperates with the annular guide surface.

[0034] The limiting mechanism is set on the base 1 and located on one side of the stepped structure of the spiral support. The limiting mechanism is provided with a guide groove that extends horizontally along the radial direction of the rotating disk 3.

[0035] The rotating disk 3 has a vertically extending handle post 6 at its top. The sliding rod 4 is located above the rotating disk 3 and can be slidably installed in the guide groove. The outer wall of the sliding rod 4 has a positioning block 7. The positioning block 7 forms a sliding part 41 and a feeding part on the sliding rod 4 respectively located on both sides of the positioning block 7. The sliding part has a waist-shaped groove that slides with the handle post 6. The waist-shaped groove extends perpendicular to the extension direction of the sliding rod 4.

[0036] In this embodiment, the tube-feeding section of the sliding rod corresponds to the heating area of ​​the tube furnace, and the positioning block and one end of the tube-feeding section correspond to the two ends of the effective heating area. A half-turn rotation of the handle column corresponds to the maximum feed amount of the sliding rod. Therefore, in practical design, the rotation diameter of the handle column can be designed as the distance from the quartz tube opening to the effective heating area of ​​the tube furnace. When the handle column rotates half a turn, the tube-feeding section of the sliding rod is exactly located within the effective heating area of ​​the tube furnace, ensuring that all metal tubes on the tube-feeding section are fed into the effective heating area.

[0037] Therefore, during testing, multiple metal tubes can be sequentially fitted onto the tube feeding section of the sliding rod, and the multiple metal tubes can be simultaneously fed into the effective heating area of ​​the tube furnace.

[0038] Referring to Figures 2-5, the specific operation of the tubular furnace sampling device for metal pipe testing in this embodiment includes the following steps:

[0039] S1. One end of the metal tube 200 is sleeved outside the tube feeding part of the sliding rod 4 and located on the side of the positioning block 7 away from the sliding part 41. The sample feeding device is placed on the opening side of the quartz tube 100 of the tube furnace, so that the metal tube 200 is inside the quartz tube 100 and the positioning block 7 is located at the opening of the quartz tube.

[0040] S2. By rotating the rotating disk 3 through the handle column 6, the guide part of the rotating shaft 5 rotates along the guide section 21 to the stepped structure and then returns to the initial position through the reset section 22. With the circular motion of the handle column, the sliding groove and the sliding rod start to move in a straight line together, and the sliding rod 4 sends the metal tube 200 into the heating area inside the quartz tube and then backs away.

[0041] Specifically, during the rotation of the rotating disk, when the handle column moves from the initial position to half a circumference, the sliding groove moves to its furthest point from the initial position. At this time, the sliding rod has driven the metal tube into the effective heating zone inside the tube furnace. Simultaneously, the guide part of the rotating shaft also moves to half a circumference during the circumferential motion and is located at the highest point of the stepped structure of the guide support. As the rotating shaft continues to rotate, the guide part falls from the highest point of the stepped structure to the lowest point. The sliding rod falls along with the rotating disk, placing the metal tube on the inner wall of the quartz tube; this action completes the unloading process of the metal tube.

[0042] When the metal tube is fed onto the sliding rod, the positioning block acts as a marker for the feeding section, ensuring that the metal tube is installed in the appropriate position on the sliding rod. During the feeding process, when there is resistance within the quartz tube, the positioning block limits the position of the end of the metal tube, ensuring that the metal tube can be delivered to the heating zone of the tube furnace.

[0043] In this embodiment, the proposed tubular furnace sample feeding device for metal pipe testing features a rotating disc mounted on a base, which can be raised and lowered rotatably via a rotating shaft. A guide support extends around the rotating shaft and has an annular guide surface extending around the shaft at its top. A stepped structure is formed at the connection between the guide section and the reset section of the annular guide surface. The side wall of the rotating shaft has a guide portion that mates with the annular guide surface. The handle column of the rotating disc drives a sliding rod to move via a waist-shaped sliding groove, and a limiting mechanism guides the sliding rod via a horizontally extending guide groove. Through this optimized design, the tubular furnace sample feeding device features a tube delivery section on the sliding rod corresponding to the heating zone of the tubular furnace. The movement of the sliding rod accurately delivers the metal pipe to the heating zone inside the tubular furnace, achieving sample delivery and unloading, while simultaneously returning to the reset position. This effectively solves the problems of difficult furnace loading operations and inaccurate sample placement in tubular furnaces.

[0044] In a specific embodiment, the guide section 21 of the annular guide surface is located on a horizontal plane, and the reset section 22 of the annular guide surface gradually rises away from the stepped structure. During the rotation of the shaft, the guide part smoothly engages with the guide surface at a position outside the step, preventing the metal tube from falling off during feeding.

[0045] In the specific design of the limiting mechanism, the limiting mechanism includes an L-shaped connecting rod 9. The guide groove is located at one end of the vertical rod of the L-shaped connecting rod 9, and one end of the horizontal rod of the L-shaped connecting rod 9 is rotatably mounted on the rotating shaft 5. In actual design, the horizontal end of the L-shaped connecting rod is designed as a ring, which is sleeved on the outside of the rotating shaft to achieve rotational engagement between the two.

[0046] Furthermore, the limiting mechanism also includes a limiting seat 8, which is mounted on the base 1. The limiting seat 8 has a U-shaped limiting groove extending downward from the top, and the crossbar of the L-shaped connecting rod 9 is located in the U-shaped limiting groove.

[0047] Referring to Figure 6, in the specific cooperation method between the guide part of the rotating shaft and the annular guide surface, the guide part of the rotating shaft 5 includes a screw 10 and a roller 11. The roller 11 is mounted on the rotating shaft 5 by the horizontally arranged screw 10 and rolls with the guide surface, ensuring that it moves with the guide surface while reducing the frictional resistance of the rotating shaft.

[0048] In a further specific embodiment, the sample delivery device of this embodiment also includes a stop pin 13. The screw 10 has a vertically penetrating mounting hole at the end away from the rotating shaft 5. The base 1 has a limiting hole corresponding to the mounting hole. One end of the stop pin 13 passes through the mounting hole and inserts into the limiting hole. Before S1, the rotating disk 3 is pre-positioned by the stop pin 13, limiting the positions of the disk and sliding rod when installing the metal tube. After S1, the stop pin 13 is removed.

[0049] In addition, the sample delivery device of this embodiment also includes a baffle 12. One end of the baffle 12 is provided with a U-shaped opening and is installed on the sliding rod 4 through the U-shaped opening. The baffle 12 is located on the side of the positioning block 7 away from the sliding part.

[0050] Accordingly, in S1, before placing the sample feeding device on the side of the quartz tube opening of the tube furnace, the baffle 12 is installed on the sliding rod 4, positioning it on the side of the positioning block 7 away from the sliding part 41 and abutting against the positioning block 7. When the sample feeding device is placed on the side of the quartz tube opening of the tube furnace, the metal tube 200 is located inside the quartz tube 100, and the baffle 12 abuts against the opening end of the quartz tube 100 on the side away from the positioning block 7. Finally, the baffle 12 is removed. Before feeding, the handle column is in the initial position, and the baffle positions the sample feeding device to ensure accurate initial positioning of the metal tube, allowing it to be delivered to the effective heating area after sample feeding.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A tubular furnace sample feeding device for testing metal pipes, characterized in that, include: The base (1), guide support (2), rotating disk (3), sliding rod (4), and limiting mechanism are provided. The rotating disk (3) is located above the base (1). The bottom of the rotating disk (3) is provided with a rotating shaft (5) and can be raised and lowered and rotated on the base (1) through the rotating shaft (5). The guide support (2) is set on the base (1) and extends around the rotating shaft (5). The top of the guide support (2) has an annular guide surface extending around the rotating shaft (5). The annular guide surface includes a guide section (21) and a reset section (22) connected end to end. The guide section (21) and the reset section (22) are smoothly connected at one end and form a stepped structure at the other end. The side wall of the rotating shaft (5) is provided with a guide part that cooperates with the annular guide surface. The limiting mechanism is set on the base (1) and Located on one side of the stepped structure of the spiral support, the limiting mechanism is provided with a guide groove extending horizontally along the radial direction of the rotating disk (3); the top of the rotating disk (3) is provided with a vertically extending handle column (6), the sliding rod (4) is located above the rotating disk (3) and can be slidably installed in the guide groove, the outer wall of the sliding rod (4) is provided with a positioning block (7), the positioning block (7) forms a sliding part (41) and a feeding part on the sliding rod (4) respectively located on both sides of the positioning block (7), the sliding part (41) is provided with a waist-shaped sliding groove that slides with the handle column (6), the waist-shaped sliding groove extends perpendicular to the extension direction of the sliding rod (4); the guide section (21) of the annular guide surface is located on the horizontal plane, and the reset section (22) of the annular guide surface gradually rises away from the stepped structure.

2. The tubular furnace sampling device for metal pipe testing according to claim 1, characterized in that, The limiting mechanism includes an L-shaped connecting rod (9), the guide groove is located at one end of the vertical rod of the L-shaped connecting rod (9), and one end of the horizontal rod of the L-shaped connecting rod (9) is rotatably mounted on the rotating shaft (5).

3. The tubular furnace sampling device for metal pipe testing according to claim 2, characterized in that, The limiting mechanism also includes a limiting seat (8), which is mounted on the base (1). The limiting seat (8) has a U-shaped limiting groove extending downward from the top, and the crossbar of the L-shaped connecting rod (9) is located in the U-shaped limiting groove.

4. The tubular furnace sampling device for metal pipe testing according to claim 1, characterized in that, The guide portion of the rotating shaft includes a screw (10) and a roller (11). The roller (11) is mounted on the rotating shaft (5) by the horizontally arranged screw (10) and rolls in cooperation with the guide surface.

5. The tubular furnace sampling device for metal pipe testing according to claim 4, characterized in that, It also includes a stop pin (13), and the screw (10) has a vertical through mounting hole at the end away from the rotating shaft (5). The base (1) has a limiting hole corresponding to the mounting hole. One end of the stop pin (13) passes through the mounting hole and is inserted into the limiting hole.

6. The tubular furnace sampling device for metal pipe testing according to claim 1, characterized in that, It also includes a baffle (12), one end of which has a U-shaped opening and is installed on the sliding rod (4) through the U-shaped opening. The baffle (12) is located on the side of the positioning block (7) away from the sliding part (41).

7. A tubular furnace sampling method using the tubular furnace sampling device for metal pipe testing according to any one of claims 1-6, characterized in that, The process includes the following steps: S1, one end of the metal tube (200) is sleeved outside the tube delivery part of the sliding rod (4) and located on the side of the positioning block (7) away from the sliding part (41), and the sample injection device is placed on the side of the opening of the quartz tube (100) of the tube furnace, so that the metal tube (200) is located inside the quartz tube (100) and the positioning block (7) is located at the opening of the quartz tube (100); S2, the rotating disk (3) is rotated by the handle column (6), so that the guide part of the rotating shaft (5) rotates along the guide section (21) to the step structure and then returns to the initial position through the reset section (22), driving the sliding rod (4) to send the metal tube (200) into the heating area inside the quartz tube (100) and then back.

8. The tubular furnace sample introduction method according to claim 7, characterized in that, In S1, before placing the sample feeding device on the side of the opening of the quartz tube (100) of the tube furnace, the baffle (12) is installed on the sliding rod (4) so ​​that it is located on the side of the positioning block (7) away from the sliding part (41) and abuts against the positioning block (7); the statement that the metal tube (200) is located inside the quartz tube (100) and the positioning block (7) is located at the opening of the quartz tube (100) specifically means that the metal tube (200) is located inside the quartz tube (100) and the baffle (12) abuts against the opening end of the quartz tube (100) on the side away from the positioning block (7); before S2, the baffle (12) is removed.

9. The tubular furnace sample introduction method according to claim 7, characterized in that, Before S1, the rotating disk (3) is pre-positioned by the stop pin (13); after S1, the stop pin (13) is removed.

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