Regulation and control device for copper pipe brazing heating process

Abstract

The utility model discloses a regulation and control device for a copper pipe brazing heating process, which relates to the technical field of brazing, and comprises a processing table, a protective box is fixedly mounted on the processing table, a feeding port is formed in the protective box, a copper pipe body is arranged in the feeding port, a heating resistance ring is fixedly arranged in the protective box, and the heating resistance ring is fixedly connected with the processing table. The copper pipe body penetrates through the heating resistance ring, the position, to be brazed, of the copper pipe body is arranged in the heating resistance ring, a limiting assembly used for limiting the copper pipe body is arranged on the machining table, a temperature sensor is fixedly installed in the protection box, an electric annular atomization spray head is arranged above the heating resistance ring, and the temperature sensor is fixedly installed in the protection box. The brazing temperature of the copper pipe is monitored through the temperature sensor, when the temperature exceeds a preset value, nitrogen is sprayed out through the annular atomization spray head to cool the brazed position, and the problems that in the prior art, heating brazing treatment is directly conducted through a heating resistance ring, local overheating is likely to be caused when the device works continuously, and the welding quality is affected are solved.

Description

Technical Field

[0001] This utility model relates to the field of brazing technology, specifically a control device for the heating process of copper tube brazing. Background Technology

[0002] Copper tube brazing technology is an important metal joining process that is widely used in the manufacturing and maintenance of various equipment in the manufacturing industry.

[0003] Chinese utility model patent application CN213351129U discloses a copper tube brazing machine, comprising a housing and a control box. A groove is formed on the upper surface of the housing, and a movable plate is connected to the upper end of the groove. An adjusting seat is mounted on the upper surface of the movable plate, and a lead screw is installed inside the adjusting seat. A connecting plate is mounted on the outer surface of the lead screw, and a clamping plate is connected to the outer wall of the connecting plate. A connecting rod is mounted on the outer wall of the clamping plate, and a chuck is located at the end of the connecting rod. A threaded rod is mounted at the front end of the connecting rod, and a top head is connected to the end of the threaded rod. A copper tube body is mounted on the inner wall of the chuck, and a heating resistance coil is mounted on the outside of the copper tube body. The control box is mounted on the upper surface of the housing, and a protective box is located below the control box, which can effectively protect the copper tube during heating.

[0004] However, existing technologies still have shortcomings:

[0005] When welding as described above, the copper tube is inserted into the protective box for vertical welding. After clamping, it is directly heated and brazed by the heating resistance coil. When the device is working continuously, it is easy to cause local overheating at the weld. When welding vertically, the copper tube overheats, and the solder will flow down the tube instead of accumulating at the weld, affecting the welding quality. Utility Model Content

[0006] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a control device for the heating process of copper tube brazing, which solves the problem that in the prior art, direct heating of the brazing process via a heating resistance coil easily leads to localized overheating when the device is continuously operating, thus affecting the welding quality.

[0007] To achieve the above objectives, this utility model proposes a control device for the brazing heating process of copper tubes, including a processing table. A protective box is fixedly installed on the processing table, and an inlet is provided on the protective box. A copper tube body is placed inside the inlet, and a heating resistance coil is fixedly installed inside the protective box. The copper tube body passes through the heating resistance coil, and the brazing part of the copper tube body is located inside the heating resistance coil. A limiting component for limiting the position of the copper tube body is provided on the processing table. A temperature sensor is fixedly installed inside the protective box. An electric annular atomizing nozzle is provided above the heating resistance coil, and the copper tube body passes through the electric annular atomizing nozzle. A nitrogen tank is fixedly installed on the processing table, and a connecting pipe is fixedly installed between the electric annular atomizing nozzle and the nitrogen tank.

[0008] As a further embodiment of this utility model, the protective box is provided with an observation port.

[0009] As a further embodiment of this utility model: the limiting component includes a limiting block, an adjusting rod, and a connecting rod; the limiting block and the adjusting rod are provided in two pairs; the limiting block is provided on both sides of the copper tube body; the adjusting rod is L-shaped; one end of the adjusting rod is fixedly connected to the limiting block; and the other end extends out of the protective box and is fixedly connected to the connecting rod.

[0010] As a further embodiment of this utility model: the protective box is provided with two pairs of guide grooves, and the adjusting rod is slidably disposed in the guide grooves.

[0011] As a further embodiment of this utility model: a pair of connecting rods are provided, and the adjusting rod located on the same side of the copper tube body is fixedly connected to one of the connecting rods.

[0012] As a further embodiment of this utility model: the limiting component further includes a bidirectional screw and a threaded block, a pair of threaded blocks are provided and fixedly disposed at the end of the connecting rod, the bidirectional screw is rotatably disposed on the processing table, and the pair of threaded blocks are threadedly connected to the bidirectional screw.

[0013] As a further embodiment of this utility model: the limiting component also includes a motor; the motor is fixedly connected to one end of the bidirectional screw.

[0014] As a further embodiment of this utility model: a pair of threaded blocks are symmetrically arranged in the opposite region of the bidirectional screw thread.

[0015] As a further embodiment of this utility model: the protective box is provided with two sets of telescopic rods, one end of the telescopic rod is fixedly connected to the protective box, and the other end is fixedly connected to the adjusting rod.

[0016] As a further embodiment of this utility model: a mounting frame is fixedly provided on the processing table, and the nitrogen tank is fixedly provided on the mounting frame.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. By installing a heating resistance coil and a temperature sensor inside the protective box, and an electric annular atomizing nozzle above the heating resistance coil, after the copper tube body is installed inside the protective box, the motor is started to move the limit block to limit the movement of the copper tube body. Then, the heating resistance coil is started to perform brazing on the copper tube body. When the temperature sensor detects that the brazing temperature of the copper tube body exceeds the predetermined value, the electric annular atomizing nozzle is started to spray nitrogen gas onto the brazing area of ​​the copper tube body to cool the brazing area. Through the above combination, the temperature of the brazing area can be easily controlled, increasing the stability of the brazing.

[0019] 2. By setting a limiting component, it is possible to limit and clamp copper tube bodies of various sizes. The limiting component includes two pairs of limiting blocks. The movement of the two pairs of limiting blocks is realized by a driving source, which saves manufacturing costs and further stabilizes the clamping. Attached Figure Description

[0020] Figure 1 The three-dimensional structure of this utility model Figure 1 ;

[0021] Figure 2 The three-dimensional structure of this utility model Figure 2 ;

[0022] Figure 3 This is a partial sectional view of the present invention.

[0023] In the diagram: 1. Processing table; 2. Protective box; 3. Observation port; 4. Feed port; 5. Copper tube body; 6. Nitrogen tank; 7. Motor; 8. Guide groove; 9. Adjusting rod; 10. Limiting block; 11. Temperature sensor; 12. Electric annular atomizing nozzle; 13. Connecting rod; 14. Threaded block; 15. Mounting bracket; 16. Bidirectional screw; 17. Heating resistance coil; 18. Telescopic rod. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] like Figure 1-3As shown, a control device for the brazing heating process of copper tubes includes a processing table 1, on which a protective box 2 is fixedly installed. The protective box 2 has an inlet 4, and a copper tube body 5 is placed inside the inlet 4. The copper tube body 5 is placed inside the protective box 2 through the inlet 4, and brazing is performed on the copper tube body 5 within the protective box 2. The protective box 2 has an observation port 3, which is made of a high-temperature resistant transparent material; in this embodiment, it is a transparent ceramic material. The observation port 3 allows workers to easily observe the processing progress within the protective box 2. A heating resistance coil 17 is fixedly installed inside the protective box 2, through which the copper tube body 5 passes. The brazing portion of the copper tube body 5 is located within the heating resistance coil 17. Limiting components are installed inside and outside the protective box 2. These limiting components are adjustable and can accommodate copper tube bodies 5 of various sizes. The clamping limit is set; a temperature sensor 11 is fixedly installed inside the protective box 2. The temperature sensor 11 is used to monitor the temperature of the part of the copper tube body 5 set inside the heating resistance coil 17, that is, the temperature of the area near the brazing; in this embodiment, the temperature sensor 11 is a non-contact infrared sensor. In specific implementation, in order to increase the stability of the temperature sensor 11 monitoring, it can be replaced with a contact sensor. It is necessary to manually or add a driving device to drive the contact sensor contact with the copper tube body 5; an electric annular atomizing nozzle 12 is set above the heating resistance coil 17. The copper tube body 5 passes through the electric annular atomizing nozzle 12. A nitrogen tank 6 is fixedly installed on the processing table 1. A connecting pipe is fixedly installed between the electric annular atomizing nozzle 12 and the nitrogen tank 6; a mounting bracket 15 is fixedly set on the processing table 1. The nitrogen tank 6 is fixedly set on the mounting bracket 15.

[0026] As one embodiment of this invention, the limiting component includes a limiting block 10, an adjusting rod 9, and a connecting rod 13. Two pairs of limiting blocks 10 and adjusting rods 9 are provided. The limiting blocks 10 are located on both sides of the copper tube body 5. The adjusting rod 9 is L-shaped, with one end fixedly connected to the limiting block 10 and the other end extending out of the protective box 2 and fixedly connected to the connecting rod 13. The protective box 2 has two pairs of guide grooves 8, and the adjusting rod 9 is slidably disposed within the guide grooves 8. A pair of connecting rods 13 are provided; the adjusting rod 9 located on the same side of the copper tube body 5 is fixedly connected to one connecting rod 13. The limiting component also includes a motor 7, a bidirectional screw 16, and threaded blocks 14. A pair of threaded blocks 14 are provided for fixing... The bidirectional screw 16 is rotatably mounted on the processing table 1 at the end of the connecting rod 13. A pair of threaded blocks 14 are symmetrically arranged in opposite thread regions of the bidirectional screw 16. The motor 7 is fixedly connected to one end of the bidirectional screw 16 to drive the rotation of the bidirectional screw 16, thereby causing the pair of threaded blocks 14 to move towards each other. The movement of the pair of threaded blocks 14 causes the pair of connecting rods 13 to move towards each other. The adjusting rod 9 drives the limiting block 10 to move towards each other until the copper tube body 5 is clamped. Two sets of telescopic rods 18 are provided inside the protective box 2. One end of the telescopic rod 18 is fixedly connected to the protective box 2, and the other end is fixedly connected to the adjusting rod 9, which further restricts the stability of the movement of the limiting block 10.

[0027] In one embodiment of this invention, the motor 7, the electric annular atomizing nozzle 12, and the heating resistance coil 17 are integrated and controlled by a programmable logic controller (PLC). After the copper tube body 5 is installed in the protective box 2, the motor 7 is started to move the limit block 10 to limit the copper tube body 5. Then, the heating resistance coil 17 is started to perform brazing on the copper tube body 5. When the temperature sensor 11 detects that the brazing temperature of the copper tube body 5 exceeds the predetermined value, the electric annular atomizing nozzle 12 is started to spray nitrogen gas onto the brazing area of ​​the copper tube body 5 to cool the brazing area and increase the stability of the brazing.

[0028] Working principle:

[0029] In use, the copper tube body 5 is first placed in the protective box 2 through the feed port 4. The part of the copper tube body 5 to be brazed is placed in the heating resistance coil 17. Then, the limiting component is activated to limit the copper tube body 5. That is, the motor 7 is started to drive the rotation of the bidirectional screw 16, which drives a pair of threaded blocks 14 to move towards each other. The movement of the pair of threaded blocks 14 drives a pair of connecting rods 13 to move towards each other. Through the transmission of the adjusting rod 9, the limiting block 10 moves towards each other until the copper tube body 5 is clamped. Then, the heating resistance coil 17 is activated to perform brazing on the copper tube body 5. When the temperature sensor 11 detects that the brazing temperature of the copper tube body 5 exceeds the predetermined value, the electric annular atomizing nozzle 12 is activated to spray nitrogen gas onto the brazing part of the copper tube body 5 to cool the brazing part.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., 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.

[0031] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A control device for a copper tube brazing heating process, characterized by, The application relates to a copper pipe brazing device, which comprises a processing table (1), a protective box (2) fixedly arranged on the processing table (1), an inlet (4) formed in the protective box (2), a copper pipe body (5) arranged in the inlet (4), a heating resistance coil (17) fixedly arranged in the protective box (2), the copper pipe body (5) penetrating through the heating resistance coil (17), the part of the copper pipe body (5) to be brazed being arranged in the heating resistance coil (17), a limiting assembly for limiting the copper pipe body (5) being arranged on the processing table (1), a temperature sensor (11) fixedly arranged in the protective box (2), an electric annular atomizing nozzle (12) arranged above the heating resistance coil (17), the copper pipe body (5) penetrating through the electric annular atomizing nozzle (12), a nitrogen tank (6) fixedly arranged on the processing table (1), and a connecting pipe fixedly arranged between the electric annular atomizing nozzle (12) and the nitrogen tank (6).

2. A control device for a brazing heating process of copper tubes according to claim 1, characterized in that, An observation opening (3) is formed in the protective box (2).

3. A control device for a brazing heating process of a copper tube according to claim 1, characterized in that, The limiting assembly comprises limiting blocks (10), adjusting rods (9) and connecting rods (13), two pairs of the limiting blocks (10) and the adjusting rods (9) are arranged, the limiting blocks (10) are arranged on the two sides of the copper pipe body (5), the adjusting rods (9) are L-shaped, one end of the adjusting rod (9) is fixedly connected with the limiting block (10), and the other end of the adjusting rod (9) extends out of the protective box (2) and is fixedly connected with the connecting rod (13).

4. A control device for a brazing heating process of copper tubes according to claim 3, characterized in that, Two pairs of guide grooves (8) are formed in the protective box (2), and the adjusting rods (9) are slidingly arranged in the guide grooves (8).

5. A control device for a brazing heating process of a copper tube according to claim 3, characterized in that, One pair of the connecting rods (13) are arranged, and the adjusting rods (9) on the same side of the copper pipe body (5) are fixedly connected with one connecting rod (13).

6. A control device for a brazing heating process of copper tubes according to claim 5, characterized in that The limiting assembly further comprises bidirectional screws (16) and threaded blocks (14), one pair of the threaded blocks (14) are fixedly arranged at the ends of the connecting rods (13), the bidirectional screws (16) are rotationally arranged on the processing table (1), and one pair of the threaded blocks (14) are screw-connected with the bidirectional screws (16).

7. A control device for a brazing process of copper tubes according to claim 6, characterized in that The limiting assembly further comprises a motor (7), and one end of the motor (7) is fixedly connected with the bidirectional screw (16).

8. A control device for a brazing heating process of copper tubes according to claim 7, characterized in that One pair of the threaded blocks (14) are symmetrically arranged at the screw-opposite regions of the bidirectional screw (16).

9. A control device for a brazing heating process of a copper tube according to claim 3, characterized in that, Two groups of telescopic rods (18) are arranged in the protective box (2), one end of the telescopic rod (18) is fixedly connected with the protective box (2), and the other end of the telescopic rod (18) is fixedly connected with the adjusting rod (9).

10. The apparatus according to claim 1, wherein An installation rack (15) is fixedly arranged on the processing table (1), and the nitrogen tank (6) is fixedly arranged on the installation rack (15).

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