Device suitable for anaerobic low-temperature welding sealing of metal pipe

Abstract

The utility model discloses a device suitable for anaerobic low-temperature welding sealing of a metal pipe, which comprises a vacuum kettle, a welding disc and a cooling assembly, and a vacuum inner cavity used for providing a vacuum environment is arranged in the vacuum kettle; the welding disc is arranged in the vacuum inner cavity, a clamping device is arranged in the welding disc and used for fixing a metal pipe to be welded and sealed, and the cooling assembly is arranged in the clamping device and used for cooling the metal pipe. According to the utility model, oxygen, nitrogen and carbon dioxide in the metal tube can be quickly and efficiently removed by introducing high-purity argon gas after vacuumizing, the anaerobic effect is obvious, and the operation is easy; the refrigerator disclosed by the utility model can be used for quickly cooling the cooling liquid and preventing the influence of high temperature generated by welding on an experimental sample in the metal tube.

Description

Technical Field

[0001] This utility model relates to the field of oxygen-free welding and sealing technology for metal pipes, and in particular to a device suitable for oxygen-free low-temperature welding and sealing of metal pipes. Background Technology

[0002] In hydrocarbon generation thermal simulation experiments, small gold sample tubes of different sizes are needed to hold different types of samples. During the experiment, the open ends of the gold tubes need to be sealed. The sealing process must ensure that the gold tube containing the sample is absolutely sealed, preventing any exchange of substances with the outside environment. The small metal tube containing the sample needs to be securely fixed to ensure the formation of the argon arc welding conductive circuit and the accurate and controllable weld point. The high temperature generated during welding and gases in the air can interfere with the effectiveness of subsequent thermal simulation experiments. Therefore, in addition to using an argon arc welding machine, auxiliary devices are required to ensure that the sealing operation is completed under oxygen-free and low-temperature conditions.

[0003] Given the above experimental and technical background, there is an urgent need for a device suitable for oxygen-free low-temperature welding and sealing of metal pipes, so as to improve the operability and success rate of small metal pipe welding and sealing operations. Utility Model Content

[0004] The purpose of this application is to provide a device suitable for oxygen-free cryogenic welding and sealing of metal tubes, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] An apparatus for oxygen-free cryogenic welding and sealing of metal tubes, comprising:

[0007] A vacuum vessel, wherein the vacuum vessel is provided with a vacuum cavity for providing a vacuum environment;

[0008] A welding pad is disposed within the vacuum cavity, and a clamp is provided within the welding pad for fixing the metal tube to be welded.

[0009] A cooling assembly is disposed within the clamp and is used to cool the metal tube.

[0010] Optionally, the clamp includes:

[0011] Clamp body;

[0012] The clamping device has multiple receiving and fixing positions, each of which is provided with an elastic positioner for pressing the metal pipe wall.

[0013] Optionally, the receiving and fixing position is a placement hole, and a plurality of placement holes are distributed in a circular shape.

[0014] Optionally, the ring is a multi-ringed ring, and the rings are concentric rings, with the placement holes evenly distributed in each ring.

[0015] Optionally, the elastic positioner is a spring, with the inner end of the spring extending radially into the placement hole.

[0016] Optionally, the cooling assembly includes:

[0017] The cooler is provided in the slots of the holder body corresponding to the annularly distributed placement holes;

[0018] Coolant, which is disposed in the placement hole.

[0019] Optionally, the lower end of the clamp body corresponding to the placement hole is hollow, the hollow is connected to all placement holes, and coolant is provided inside the hollow.

[0020] Optionally, a welding machine terminal is provided on one side of the clamp body, which is used to connect to the negative terminal of the welding machine.

[0021] Optionally, the vacuum vessel includes:

[0022] A vacuum pool, the upper end of which is open, the welding plate is disposed inside the vacuum pool, and the vacuum pool is provided with a vacuum pumping interface and an argon gas interface;

[0023] The top cover, which is a sealing cover, is located at the upper end of the vacuum chamber.

[0024] Optionally, the top cover is provided with a vacuum pressure gauge for monitoring the gas pressure inside the vacuum vessel.

[0025] In summary, the technical effects and advantages of this utility model are as follows: the method of introducing high-purity argon gas after vacuuming can quickly and efficiently remove oxygen, nitrogen, and carbon dioxide from the inside of the metal tube, resulting in a significant oxygen-free effect and ease of operation; the cooler of this utility model can rapidly cool the coolant, preventing the high temperature generated during welding from affecting the experimental sample inside the metal tube; this utility model uses a multi-hole clamp and an elastic positioner, making it suitable for welding large batches of metal tubes of various specifications, providing a firm fixation and good compatibility. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1This is a schematic diagram of a device for oxygen-free low-temperature welding and sealing of metal pipes according to one embodiment of the present invention.

[0028] Figure 2 This is a top view of a device for oxygen-free low-temperature welding of metal pipes according to an embodiment of the present invention.

[0029] The components include: 1. Vacuum chamber; 2. Top cover; 3. Silicone sealing ring; 4. Vacuum pressure gauge; 5. Vacuuming interface; 6. Argon interface; 7. Clamp body; 8. Cooler; 9. Elastic positioner; 10. Welding machine terminal; 11. Heat sink; 12. Coolant; 13. Vacuum autoclave; and 14. Welding plate. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the system or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0034] This embodiment provides a device suitable for oxygen-free low-temperature welding and sealing of metal tubes, such as... Figure 1 and Figure 2As shown, it includes a vacuum vessel 13, a welding plate 14, and a cooling assembly. The vacuum vessel 13 has a vacuum cavity for providing a vacuum environment. The welding plate 14 is located in the vacuum cavity and has a clamp for fixing the metal tube to be welded. The cooling assembly is located in the clamp and is used to cool the metal tube.

[0035] In this embodiment, the vacuum cavity allows the metal tube on the clamp to be in a vacuum, the clamp can fix the metal tube well, and the cooling component can cool the metal tube, blocking the influence of the high temperature generated by welding on the experimental sample inside the metal tube.

[0036] Specifically, the clamp includes a clamp body 7 and receiving and fixing positions. Multiple receiving and fixing positions are disposed on the clamp body 7, and each receiving and fixing position is provided with an elastic locator 9 for pressing against the wall of the metal tube. The multiple receiving and fixing positions allow for the processing of multiple metal tubes at once, improving processing efficiency.

[0037] Optionally, the receiving and fixing position is a placement hole, and the plurality of placement holes are distributed in a ring shape. Preferably, the ring is a multi-ring ring, and the ring is a concentric ring, with the placement holes evenly distributed in each ring. In this embodiment, the multi-ring distribution of the placement holes is an optional method, and this application does not impose specific restrictions on the distribution position of the placement holes.

[0038] In this embodiment, specifically, the diameter of the placement holes inside the clamp is 9mm, and the number of placement holes is 32. Figure 2 As shown, the placement holes are arranged in three rings.

[0039] Optionally, the elastic positioner 9 is a spring, with its inner end extending radially into the placement hole. The elastic positioner 9 can press the placed metal tube against the inner wall of the placement hole, fixing metal tubes of different diameters and keeping them upright. The number of elastic positioners 9 can be 1, 2, 3, etc.; in this embodiment, there is one elastic positioner 9 in each placement hole.

[0040] Specifically, the cooling assembly includes a cooler 8 and a coolant 12. The clamp body 7 has slots corresponding to the annularly distributed placement holes, and the cooler 8 is disposed within these slots. In this embodiment, the cooler 8 is a semiconductor cooler 8, which has heat sinks 11 for heat dissipation. The coolant 12 is disposed within the placement holes. The placement holes are filled with coolant 12, which is in contact with the metal tube. The cooler 8 allows the coolant 12 to cool down rapidly, thus cooling the metal tube. Optionally, the coolant 12 can be cooling water or ethylene glycol coolant 12, etc.

[0041] Optionally, the lower end of the clamp body 7 corresponding to the placement hole is hollow, the hollow is connected to all placement holes, and coolant 12 is disposed inside the hollow. The hollow increases the capacity of the coolant 12, thereby improving the cooling effect.

[0042] Optionally, the clamp body 7 is made of stainless steel. A welding machine terminal 10 is provided on one side of the clamp body 7. During welding operations, the welding machine terminal 10 is used to connect to the negative terminal of the welding machine, so that the metal tube inside the clamp is connected to the negative terminal of the welding machine.

[0043] Specifically, the vacuum vessel 13 includes a vacuum chamber 1 and a top cover 2. The upper end of the vacuum chamber 1 is open, and the welding plate 14 is disposed inside the vacuum chamber 1. The vacuum chamber 1 is provided with a vacuum pumping port 5 and an argon gas port 6. The top cover 2 is sealed to the upper end of the vacuum chamber 1 by a silicone sealing ring 3.

[0044] Optionally, both the vacuum chamber 1 and the top cover 2 are made of transparent plastic. The temperature resistance range of the vacuum chamber 1 and the top cover 2 is -40 to 120°C.

[0045] Optionally, a vacuum pressure gauge 4 for measuring is provided on the top cover 2. The vacuum pressure gauge 4 has a range of -0.1 to 0 MPa and monitors the gas pressure inside the vacuum vessel 13.

[0046] Optionally, a manual valve is provided at the vacuum port 5, and the manual valve is connected to the vacuum pump gas circuit.

[0047] Optionally, a high-purity argon gas interface 6 is provided on one side of the vacuum pool 1. The argon gas interface 6 can adjust the gas flow rate and connect to an argon gas pipeline.

[0048] The working process of this embodiment:

[0049] Step A. Add coolant 12 into the placement hole of the clamp, and make sure the level of coolant 12 is higher than the elastic locator 9 in the placement hole. Insert the metal tube with the top opening after sample loading vertically into the placement hole.

[0050] Step B. Cover with top cover 2, connect vacuum pump to vacuum port 5, evacuate to -0.1MPa, and close the valves at vacuum pump and vacuum port 5. Connect argon gas source to argon port 6, adjust the flow valve on the argon pipeline to allow argon gas to flow into vacuum vessel 13 at a flow rate of approximately 5L / min. When the vacuum pressure gauge 4 on top cover 2 approaches 0MPa (one atmosphere), close argon port 6.

[0051] Step C. Repeat step B to fill the vacuum vessel 13 with argon gas; let it stand for 5 minutes. At this time, the top of the sample loading metal tube fixed on the welding plate 14 will be open, and the metal tube will be filled with argon gas and in an oxygen-free state.

[0052] Step D. Start the cooler 8, operating temperature -10℃. Open the top cover 2 of the vacuum vessel 13, and use flat-nose pliers to flatten the openings at the top of the metal tubes one by one.

[0053] Step E. Connect the negative electrode of the argon arc welding machine to the welding machine terminal 10, and weld the top of the metal pipe one by one.

[0054] The method of introducing high-purity argon gas after vacuuming in this embodiment can quickly and efficiently remove oxygen, nitrogen, and carbon dioxide from the inside of the metal tube, resulting in a significant oxygen-free effect and easy operation. The cooler of this utility model can rapidly cool the coolant, blocking the influence of the high temperature generated during welding on the experimental sample inside the metal tube. This utility model adopts a multi-hole clamp and an elastic positioner, which is suitable for welding large batches of metal tubes of various specifications, and is firmly fixed and has good compatibility.

[0055] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not limiting. Those skilled in the art can make many specific modifications under the guidance of the present invention without departing from the spirit and scope of the claims, and these modifications all fall within the scope of protection of the present invention.

Claims

1. A device suitable for oxygen-free cryogenic welding and sealing of metal pipes, characterized in that, include: Vacuum vessel (13), wherein the vacuum vessel (13) is provided with a vacuum cavity for providing a vacuum environment; A welding disc (14) is disposed in the vacuum cavity, and a clamp is provided in the welding disc (14) for fixing the metal tube to be welded. A cooling assembly is disposed within the clamp and is used to cool the metal tube.

2. The device for oxygen-free cryogenic welding and sealing of metal tubes according to claim 1, characterized in that, The clamp includes: Clamp body (7); The receiving and fixing positions are provided on the clamp body (7), and each receiving and fixing position is provided with an elastic locator (9) for pressing the metal pipe wall.

3. The device for oxygen-free cryogenic welding and sealing of metal tubes according to claim 2, characterized in that: The receiving and fixing position is a placement hole, and multiple placement holes are distributed in a circular shape.

4. The device for oxygen-free cryogenic welding and sealing of metal tubes according to claim 3, characterized in that: The ring is a multi-ringed, concentric ring, and the placement holes are evenly distributed in each ring.

5. The device for oxygen-free cryogenic welding and sealing of metal tubes according to claim 3, characterized in that: The elastic positioner (9) is a spring, and the inner end of the spring extends into the placement hole radially.

6. The apparatus for oxygen-free cryogenic welding and sealing of metal pipes according to claim 4, characterized in that, The cooling assembly includes: The cooler (8) is located in the slotted placement holes corresponding to the annular distribution of the clamp body (7); Coolant (12), which is disposed in the placement hole.

7. The apparatus for oxygen-free cryogenic welding and sealing of metal tubes according to claim 6, characterized in that: The clamp body (7) has a hollow section at the lower end corresponding to the placement hole. The hollow section is connected to all placement holes and contains coolant (12).

8. The apparatus for oxygen-free cryogenic welding and sealing of metal tubes according to claim 2, characterized in that: The clamp body (7) has a welding machine terminal (10) on one side, which is used to connect to the negative terminal of the welding machine.

9. The apparatus for oxygen-free cryogenic welding and sealing of metal tubes according to claim 1, characterized in that, The vacuum vessel (13) includes: Vacuum pool (1), the upper end of the vacuum pool (1) is open, the welding plate (14) is located in the vacuum pool (1), and the vacuum pool (1) is provided with a vacuum port (5) and an argon port (6); Top cover (2), the top cover (2) is sealed at the upper end of the vacuum pool (1).

10. The apparatus for oxygen-free cryogenic welding and sealing of metal tubes according to claim 9, characterized in that: The top cover (2) is equipped with a vacuum pressure gauge (4) for monitoring the gas pressure inside the vacuum vessel (13).

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