Composite wall electric heating tube and preparation process

Abstract

The application discloses a composite wall electric heating tube and a preparation process, relates to the technical field of electric heating tubes, and comprises a tube body, an aluminum pipe is sleeved on the outer wall of the tube body, the shape of the tube body is annular, the top of the aluminum pipe is arc-shaped, and the bottom of the aluminum pipe is flat, a preparation process of the composite wall electric heating tube comprises the following steps: step one, sleeving the aluminum pipe on the outer wall of the straight tube body through a sleeve device; step two, bending the tube body into a circular ring after the sleeving is completed; and step three, extruding and forming the aluminum pipe through a hydraulic machine. The aluminum pipe is arranged, the bottom end of the aluminum pipe is flat, welding and fixing of the aluminum pipe and a heat conduction disc are facilitated, the sleeve device is used for automatically feeding and sleeving the aluminum pipe and the heat conduction disc when the aluminum pipe is sleeved with the heat conduction pipe, the tube body is wrapped by the aluminum pipe, and the tube body is prevented from directly contacting oxygen in the air to cause an oxidation reaction.

Description

Technical Field

[0001] The present invention relates to the technical field of electric heating tubes, in particular to a composite wall electric heating tube and a preparation process thereof. Background Art

[0002] Industrial electric heating pipes are metal tubular electric heater elements. They are made by placing electric heating elements in metal tubes and tightly filling the gaps with crystalline magnesium oxide powder with good heat resistance, thermal conductivity and insulation, and then undergoing other processing. Industrial electric heating pipes are electrical components that convert electrical energy into thermal energy. Due to their low price, ease of use, easy installation and no pollution, they are widely used in various heating occasions.

[0003] However, during the use of the electric heating tube, it is necessary to fix the electric heating tube on the heat conducting plate. Since the outer wall of the electric heating tube is made of iron, it cannot be directly welded to the aluminum heat conducting plate. At the same time, the electric heating tube comes into contact with the air during use, and the iron material on the outer surface of the electric heating tube is easy to react with the oxygen in the air. In order to prevent the outer surface of the electric heating tube from being oxidized by direct contact with the air and to facilitate welding on the heat conducting plate, a composite wall electric heating tube and a preparation process are provided. Summary of the Invention

[0004] The purpose of the present invention is to provide a composite wall electric heating tube and a preparation process in order to prevent the outer surface of the electric heating tube from being oxidized by direct contact with air and to facilitate welding on a heat conducting plate.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a composite wall electric heating tube and its preparation process, comprising a tube body, the outer wall of which is sleeved with an aluminum tube, the shape of the tube body is annular, the top of the aluminum tube is arc-shaped, and the bottom of the aluminum tube is flat.

[0006] A preparation process of a composite wall electric heating tube comprises the following steps:

[0007] Step 1: Use the sleeve device to sleeve the aluminum tube on the outer wall of the straight tube body;

[0008] Step 2: Bend the sleeved tube into a ring shape;

[0009] Step 3: Place the tube body into the mold and extrude the aluminum tube through a hydraulic press. The tube body fits tightly against the aluminum tube, and the bottom end of the aluminum tube is flat and the top end is curved.

[0010] As a further solution of the present invention: the sleeve device used in step 1 includes a mounting frame, the outer wall of the mounting frame is provided with a pushing mechanism, and the mounting frame automatically loads the tube body and the aluminum tube respectively through a feeding mechanism and a feeding mechanism.

[0011] As a further solution of the present invention: the pushing mechanism includes a slide rail fixedly connected to the outer wall of the mounting frame, the top end of the slide rail is slidably connected to a push plate, the outer wall of the mounting frame is installed with a motor that drives the screw rod to rotate, the screw rod is connected to the push plate, and the two ends of the push plate are respectively fixedly connected to the first movable plate and the second movable plate.

[0012] As a further solution of the present invention: the unloading mechanism includes a first storage rack, which is fixedly connected to the outer wall of the mounting rack and located at one end of the slide rail, and the interior of the first storage rack is slidably connected with a first C-shaped rack and a second C-shaped rack extending from both sides of the first storage rack respectively, the outer wall of the first C-shaped rack is connected to a first spring, the outer wall of the second C-shaped rack is connected to a second spring, one end of the first spring and the second spring are both connected to the mounting rack, and the first movable plate is located between the first C-shaped rack and the first storage rack.

[0013] As a further solution of the present invention: the feeding mechanism includes a second storage rack, which is fixedly connected to the outer wall of the mounting rack and located above the slide rail. The interior of the second storage rack is slidably connected with a first partition and a second partition extending to the outside of the second storage rack. The second partition is located above the first partition. The interior of the second storage rack is rotatably connected with a spur gear located between the first partition and the second partition. The first partition and the first C-shaped frame are fixedly connected by a connecting rod.

[0014] As a further solution of the present invention: a threaded hole is opened on the outer wall of the push plate, and the threaded hole matches the screw rod. The bottom end of the push plate is fixedly connected with a T-shaped block, and the T-shaped block extends to the bottom of the slide rail. The inner wall of the slide rail fits with the outer wall of the tube body.

[0015] As a further solution of the present invention: the first C-shaped frame and the second C-shaped frame divide the inner wall space of the first storage rack into four parts, which are the first hollow groove, the second hollow groove, the third hollow groove and the fourth hollow groove from bottom to top. The outer wall of the first storage rack is provided with a groove for the tube body to pass through. The inner circles of the first spring and the second spring are both provided with telescopic rods, one end of the two telescopic rods is fixedly connected to the mounting frame, and the other ends of the two telescopic rods are respectively connected to the first C-shaped frame and the second C-shaped frame, and the outer wall of the aluminum tube is in contact with the inner wall of the first storage rack.

[0016] As a further solution of the present invention: the outer wall of the tube body is in contact with the inner wall of the second storage rack, and the outer walls of the second partition and the first partition are both provided with teeth, and the teeth are meshed with the spur gears.

[0017] Compared with the prior art, the present application has the advantages of:

[0018] By setting the aluminum pipe, the bottom end of the aluminum pipe is flat, which facilitates welding and fixing with the heat conduction disc; when the aluminum pipe and the heat conduction pipe are sleeved, the sleeve device is used to automatically feed and sleeve the aluminum pipe and the heat conduction pipe; the pipe body is wrapped by the aluminum pipe to prevent the pipe body from directly contacting oxygen in the air and causing oxidation reaction. The electric heating pipe provided with a composite wall produced by the process not only improves the product quality, but also effectively improves the production efficiency and reduces the production cost by using special matching equipment. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of the present application;

[0020] Figure 2 is a structural schematic view of the mounting frame of the present application;

[0021] Figure 3 is a mounting schematic view of the motor of the present application;

[0022] Figure 4 is a structural schematic view of the first storage rack of the present application;

[0023] Figure 5 is a structural schematic view of the push plate of the present application;

[0024] Figure 6 is a sectional view of the second storage rack of the present application;

[0025] Figure 7 is a sectional view of the first storage rack of the present application;

[0026] Figure 8 is a structural schematic view of the groove of the present application.

[0027] In the figure: 1, pipe body; 2, aluminum pipe; 3, mounting frame; 4, pushing mechanism; 401, sliding rail; 402, motor; 403, screw rod; 404, push plate; 405, first movable plate; 406, second movable plate; 5, blanking mechanism; 501, first storage rack; 502, first C-shaped frame; 503, second C-shaped frame; 504, first spring; 505, second spring; 6, feeding mechanism; 601, second storage rack; 602, first partition plate; 603, second partition plate; 604, straight gear; 605, connecting rod; 7, first hollow groove; 8, second hollow groove; 9, third hollow groove; 10, fourth hollow groove; 11, groove; 12, telescopic rod. DETAILED DESCRIPTION

[0028] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of the present application.

[0029] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of the present application. Figure 1 Figure 8 In the embodiments of the present application, a composite wall electric heating tube comprises a tube body 1, an aluminum pipe 2 is sleeved on the outer wall of the tube body 1, the tube body 1 is annular in shape, the top of the aluminum pipe 2 is arc-shaped, and the bottom of the aluminum pipe 2 is flat.

[0030] A preparation process of a composite wall electric heating tube comprises the following steps:

[0031] Step one: through a sleeve device, the aluminum pipe 2 is sleeved on the outer wall of the straight strip-shaped tube body 1;

[0032] Step two: the tube body 1 after sleeving is bent into a circular ring shape;

[0033] Step three: the tube body 1 is placed into a mold, the aluminum pipe 2 is extruded and formed by a hydraulic machine, the tube body 1 and the aluminum pipe 2 are tightly combined, and meanwhile the bottom end of the aluminum pipe 2 is flat and the top end is arc-shaped.

[0034] In the embodiments of the present application: the bottom end of the aluminum pipe 2 is flat, which facilitates welding with a heat-conducting disc and avoids damage to the tube body 1 caused by direct welding of the tube body 1 with the heat-conducting disc; the tube body 1 is wrapped by the aluminum pipe 2, which prevents the tube body 1 from being in contact with oxygen in the air and thus prevents oxidation reaction.

[0035] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of the present application. Figure 2 Figure 8 In the embodiments of the present application, the sleeve device used in step one comprises a mounting frame 3, a pushing mechanism 4 is arranged on the outer wall of the mounting frame 3, the tube body 1 and the aluminum pipe 2 are automatically fed by a blanking mechanism 5 and a feeding mechanism 6 respectively, the pushing mechanism 4 comprises a sliding rail 401 fixedly connected to the outer wall of the mounting frame 3, a push plate 404 is slidably connected to the top end of the sliding rail 401, a motor 402 is installed on the outer wall of the mounting frame 3 to drive a screw rod 403 to rotate, the screw rod 403 is connected to the push plate 404, the two ends of the push plate 404 are fixedly connected with a first movable plate 405 and a second movable plate 406 respectively, a threaded hole is formed in the outer wall of the push plate 404, the threaded hole is matched with the screw rod 403, a T-shaped block is fixedly connected to the bottom end of the push plate 404, the T-shaped block extends to below the sliding rail 401, and the inner wall of the sliding rail 401 is combined with the outer wall of the tube body 1.

[0036] ​​In this embodiment: the aluminum tube 2 is placed in the first storage rack 501, and the tube body 1 is placed in the second storage rack 601. The motor 402 drives the screw rod 403 to rotate, and the rotation of the screw rod 403 drives the push plate 404 to move. The push plate 404 moves the tube body 1 on the slide rail 401, and the T-shaped block limits the displacement of the push plate 404.

[0037] Please refer to Figure 2 - Figure 8 , the unloading mechanism 5 includes a first storage rack 501, the first storage rack 501 is fixedly connected to the outer wall of the mounting rack 3 and is located at one end of the slide rail 401, the first storage rack 501 is slidably connected to the first C-shaped rack 502 and the second C-shaped rack 503 extending from both sides of the first storage rack 501 respectively, the outer wall of the first C-shaped rack 502 is connected to the first spring 504, the outer wall of the second C-shaped rack 503 is connected to the second spring 505, one end of the first spring 504 and the second spring 505 are both connected to the mounting rack 3, the first movable plate 405 is located between the first C-shaped rack 502 and the first storage rack 501, the first The C-shaped frame 502 and the second C-shaped frame 503 divide the inner wall space of the first storage rack 501 into four parts, which are the first hollow groove 7, the second hollow groove 8, the third hollow groove 9 and the fourth hollow groove 10 from bottom to top. The outer wall of the first storage rack 501 is provided with a groove 11 for the tube body 1 to pass through. The inner circles of the first spring 504 and the second spring 505 are both provided with telescopic rods 12. One end of the two telescopic rods 12 is fixedly connected to the mounting frame 3, and the other ends of the two telescopic rods 12 are respectively connected to the first C-shaped frame 502 and the second C-shaped frame 503. The outer wall of the aluminum tube 2 fits in place with the inner wall of the first storage rack 501.

[0038] In this embodiment, when the push plate 404 moves away from the first storage rack 501, the push plate 404 moves and drives the first movable plate 405 to move. The first movable plate 405 moves and drives the first C-shaped frame 502 to move, causing the first spring 504 to be squeezed. The sleeved tube body 1 falls down, and the aluminum tube 2 in the fourth hollow groove 10 enters the third hollow groove 9. When the push plate 404 moves toward the first storage rack 501, the tube body 1 is pushed to move on the slide rail 401. The first C-shaped frame 502 is squeezed by the first spring The second movable plate 406 is displaced and contacts the second C-shaped frame 503, pushing the second C-shaped frame 503 to move, causing the second spring 505 to be squeezed. When the second C-shaped frame 503 moves out of the inner wall of the first storage rack 501, the aluminum tube 2 in the second hollow groove 8 enters the first hollow groove 7, and the aluminum tube 2 in the third hollow groove 9 enters the second hollow groove 8. The push plate 404 pushes the tube body 1 into the inner wall of the aluminum tube 2 for splicing.

[0039] Please refer toFigure 2 - Figure 6 The feeding mechanism 6 includes a second storage rack 601, which is fixedly connected to the outer wall of the mounting frame 3 and is located above the slide rail 401. The interior of the second storage rack 601 is slidably connected with a first partition 602 and a second partition 603 extending to the outside of the second storage rack 601. The second partition 603 is located above the first partition 602. The interior of the second storage rack 601 is located between the first partition 602 and the second partition 603 and is rotatably connected with a spur gear 604. The first partition 602 and the first C-shaped frame 502 are fixedly connected by a connecting rod 605. The outer wall of the tube body 1 is in contact with the inner wall of the second storage rack 601. The outer walls of the second partition 603 and the first partition 602 are provided with teeth and grooves, which mesh with the spur gear 604.

[0040] In this embodiment, the aluminum tube 2 is placed in the first storage rack 501, and the tube body 1 is placed in the second storage rack 601. The motor 402 drives the screw rod 403 to rotate, and the screw rod 403 rotates to drive the push plate 404 to move. The push plate 404 moves to push the tube body 1 on the slide rail 401. When the aluminum tube 2 is stored in the first storage rack 501, the second hollow groove 8 and the fourth hollow groove 10 are filled with the aluminum tube 2 (such as Figure 7 As shown in the figure, the first hollow groove 7 contains the tube body 1 that has been previously sleeved. When the push plate 404 moves away from the first storage rack 501, the first C-shaped rack 502 moves and drives the first partition 602 to move through the connecting rod 605. The first partition 602 moves and drives the second partition 603 to move in the opposite direction through the spur gear 604. When the first partition 602 moves out of the inner wall of the second storage rack 601, a tube body 1 falls on the slide rail 401. When the push plate 404 moves toward the first storage rack 501, the first partition 602 and the second partition 603 are displaced and reset.

[0041] Working principle: First, the aluminum tube 2 is placed in the first storage rack 501, and the tube body 1 is placed in the second storage rack 601. The motor 402 drives the screw rod 403 to rotate, and the screw rod 403 rotates to drive the push plate 404 to move. The push plate 404 moves and pushes the tube body 1 on the slide rail 401 to move. When the aluminum tube 2 is stored in the first storage rack 501, the second hollow groove 8 and the fourth hollow groove 10 are filled with aluminum tubes 2 (such as Figure 7As shown in FIG, the first hollow groove 7 is provided with the tube body 1 that has been sleeved the previous time. When the push plate 404 moves away from the first storage rack 501, the push plate 404 moves and drives the first movable plate 405 to move. The first movable plate 405 moves and drives the first C-shaped frame 502 to move, causing compression on the first spring 504. The sleeved tube body 1 falls, and the aluminum tube 2 in the fourth hollow groove 10 enters the third hollow groove 9. At the same time, the first C-shaped frame 502 moves and drives the first partition plate 602 to move through the connecting rod 605. The first partition plate 602 moves and drives the second partition plate 603 to move in the opposite direction through the spur gear 604. When the first partition plate 602 moves out of the inner wall of the second storage rack 601, a tube body 1 falls on the slide rail 401. When the push plate 404 moves toward the first storage rack 501, it pushes the tube body 1. The body 1 is displaced on the slide rail 401, and the first C-shaped frame 502 is reset by the elastic force of the first spring 504, and at the same time drives the first partition 602 and the second partition 603 to be displaced and reset. The displacement of the push plate 404 drives the second movable plate 406 to be displaced. The displacement of the second movable plate 406 contacts the second C-shaped frame 503, pushes the second C-shaped frame 503 to be displaced, and squeezes the second spring 505. When the second C-shaped frame 503 moves out of the inner wall of the first storage rack 501, the aluminum tube 2 in the second hollow groove 8 enters the first hollow groove 7, and the aluminum tube 2 in the third hollow groove 9 enters the second hollow groove 8. The push plate 404 pushes the tube body 1 into the inner wall of the aluminum tube 2 for splicing, which facilitates the automatic socketing of the electric heating tube and the aluminum tube 2.

[0042] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A method for preparing a composite wall electric heating tube, characterized in that: The composite wall electric heating tube comprises a tube body (1), the outer wall of the tube body (1) is sleeved with an aluminum tube (2), the tube body (1) is annular in shape, the top of the aluminum tube (2) is arc-shaped, and the bottom of the aluminum tube (2) is flat; The preparation process of the composite wall electric heating tube includes the following steps: Step 1: Using a sleeve device, sleeve the aluminum tube (2) onto the outer wall of the straight tube body (1); Step 2: bending the sleeved tube (1) into a circular ring shape; Step 3: Place the tube body (1) into the mold, and extrude the aluminum tube (2) using a hydraulic press, so that the tube body (1) and the aluminum tube (2) fit tightly together, and at the same time, make the bottom end of the aluminum tube (2) flat and the top end curved; The sleeve device used in step 1 comprises a mounting frame (3), the outer wall of the mounting frame (3) is provided with a pushing mechanism (4), and the mounting frame (3) automatically loads the aluminum tube (2) and the tube body (1) respectively through a feeding mechanism (5) and a feeding mechanism (6); The pushing mechanism (4) comprises a slide rail (401) fixedly connected to the outer wall of the mounting frame (3); the top end of the slide rail (401) is slidably connected to a push plate (404); and the two ends of the push plate (404) are respectively fixedly connected to a first movable plate (405) and a second movable plate (406); The unloading mechanism (5) includes a first storage rack (501), the first storage rack (501) is fixedly connected to the outer wall of the mounting rack (3) and is located at one end of the slide rail (401), the first storage rack (501) is internally slidably connected to a first C-shaped rack (502) and a second C-shaped rack (503) respectively extending from both sides of the first storage rack (501), the outer wall of the first C-shaped rack (502) is connected to a first spring (504), the outer wall of the second C-shaped rack (503) is connected to a second spring (505), one end of each of the first spring (504) and the second spring (505) is connected to the mounting rack (3), and the first movable plate (405) is located between the first C-shaped rack (502) and the first storage rack (501); The first C-shaped frame (502) and the second C-shaped frame (503) divide the inner wall space of the first storage rack (501) into four parts, which are, from bottom to top, the first hollow groove (7), the second hollow groove (8), the third hollow groove (9) and the fourth hollow groove (10); When the push plate (404) moves away from the first storage rack (501), the push plate (404) moves and drives the first movable plate (405) to move. The first movable plate (405) moves and drives the first C-shaped frame (502) to move, causing the first spring (504) to be squeezed. The sleeved tube body (1) falls down, and the aluminum tube (2) in the fourth hollow groove (10) enters the third hollow groove (9). When the push plate (404) moves toward the first storage rack (501), it pushes the tube body (1) to move on the slide rail (401). The first C-shaped frame (502) is elastically supported by the first spring (504). The push plate (404) is reset by the action of force, and the displacement of the second movable plate (406) drives the displacement of the second movable plate (406). The displacement of the second movable plate (406) contacts the second C-shaped frame (503), pushing the second C-shaped frame (503) to move, causing compression on the second spring (505). When the second C-shaped frame (503) moves out of the inner wall of the first storage rack (501), the aluminum tube (2) in the second hollow groove (8) enters the first hollow groove (7), and the aluminum tube (2) in the third hollow groove (9) enters the second hollow groove (8). The push plate (404) pushes the tube body (1) into the inner wall of the aluminum tube (2) for splicing.

2. The method for preparing a composite wall electric heating tube according to claim 1, characterized in that: A motor (402) for driving a screw rod (403) to rotate is installed on the outer wall of the mounting frame (3), and the screw rod (403) is connected to the push plate (404).

3. The method for preparing a composite wall electric heating tube according to claim 2, characterized in that: The feeding mechanism (6) includes a second storage rack (601), the second storage rack (601) is fixedly connected to the outer wall of the mounting rack (3) and is located above the slide rail (401), the interior of the second storage rack (601) is slidably connected to a first partition (602) and a second partition (603) extending to the outside of the second storage rack (601), the second partition (603) is located above the first partition (602), the interior of the second storage rack (601) is rotatably connected to a spur gear (604) located between the first partition (602) and the second partition (603), and the first partition (602) and the first C-shaped rack (502) are fixedly connected via a connecting rod (605).

4. The method for preparing a composite wall electric heating tube according to claim 2, characterized in that: The outer wall of the push plate (404) is provided with a threaded hole, which matches the screw rod (403). The bottom end of the push plate (404) is fixedly connected with a T-shaped block, which extends to the bottom of the slide rail (401). The inner wall of the slide rail (401) is in contact with the outer wall of the tube body (1).

5. The method for preparing a composite wall electric heating tube according to claim 2, characterized in that: The outer wall of the first storage rack (501) is provided with a groove (11) for the tube body (1) to pass through, and the inner rings of the first spring (504) and the second spring (505) are both provided with telescopic rods (12), one end of the two telescopic rods (12) is fixedly connected to the mounting rack (3), and the other ends of the two telescopic rods (12) are respectively connected to the first C-shaped rack (502) and the second C-shaped rack (503), and the outer wall of the aluminum tube (2) is in contact with the inner wall of the first storage rack (501).

6. The method for preparing a composite wall electric heating tube according to claim 3, characterized in that: The outer wall of the tube body (1) is in contact with the inner wall of the second storage rack (601), and the outer walls of the second partition (603) and the first partition (602) are both provided with tooth grooves, which mesh with the spur gear (604).

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