Metal tube ink-jet drying device

Abstract

The utility model discloses a metal pipe ink jet drying device which comprises a fan, an air heating box and a drying pipe, the drying pipe comprises a straight pipe, an air inlet pipe opening and an air return pipe opening are formed in the two ends of the outer wall of the circumference of the straight pipe, and an air outlet of the air heating box is connected with the air inlet pipe opening through an air inlet pipeline. An air inlet of the fan is connected with the air return pipe orifice through an air return pipeline, and the fan is connected with the air heating box through a pipeline; an annular step groove A is formed in the initial end of the circumferential inner wall of the straight pipe, an air blowing guide sleeve is fixedly embedded in the annular step groove A, the inner side end of the air blowing guide sleeve is a conical necking opening, a conical annular air guiding cavity is formed between the conical necking opening of the air blowing guide sleeve and the annular step groove A of the straight pipe, and a blowing circular seam is formed between the tail end of the conical necking opening and the step face of the annular step groove A; the air inlet pipe opening is formed in the position of the conical annular air guide cavity; the air inlet pipeline is also connected with an airflow heating pipe; the drying device has the advantages of low energy consumption, high drying efficiency, improved production efficiency and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of metal tube inkjet drying, in particular to a metal tube inkjet drying device. Background Art

[0002] Inkjet printing is one of the processes in the production of metal tubes, and it is necessary to perform inkjet printing and drying on the damaged parts of the metal tubes. The drying method currently used is a resistive heating tube heating method, which uses a fan to blow out flowing air to drive the heat of the heating tube, and is used to dry the ink on the surface of the metal tube in the drying chamber; Patent publication number CN212636938U discloses a copper tube drying device, which specifically discloses a straight pipe with an inlet and an outlet, an air inlet pipe and an air outlet pipe connected to the straight pipe, and a fan connected to the air outlet pipe to form a negative pressure to extract the drying air flow. However, there is a problem that the hot air in the drying tube cannot quickly reach the drying temperature when the drying device is just started, and it takes a period of time to reach the drying working state, which reduces the production efficiency of the metal tube, has high energy consumption, and the hot air flow in the drying tube is not stable, the flow rate is low, and the drying efficiency is low. Utility Model Content

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a metal tube inkjet drying device, so that the hot air in the drying tube quickly reaches the drying temperature to ensure that the drying device can quickly enter the drying working state, thereby improving the production efficiency of the metal tube, with low energy consumption, and the hot air in the drying tube flows quickly and smoothly, and the ejected hot air has a converging effect, and the drying efficiency is high; the position height of the drying tube can be adjusted conveniently and flexibly to ensure the coaxiality of the metal tube and the drying tube, thereby improving the drying effect, so as to adapt to the position adjustment of the supporting equipment of the external production line, and can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a metal tube inkjet drying device, comprising a fan, an air heating box and a drying tube, the drying tube comprising a straight tube, an air inlet and a return air outlet respectively provided at both ends of the circumferential outer wall of the straight tube, the air outlet of the air heating box is connected to the air inlet through an air inlet duct, the air inlet of the fan is connected to the return air outlet through a return air duct, and the air outlet of the fan is connected to the air inlet of the air heating box through a duct; an annular step groove A is provided at the starting end of the circumferential inner wall of the straight tube, and a blower is fixedly nested in the annular step groove A. The guide sleeve, the inner end of the blowing guide sleeve is a tapered necking, and the outer cone surface of the tapered necking is bent inward along its center line, a tapered annular air guide cavity is formed between the tapered necking of the blowing guide sleeve and the annular step groove A of the straight pipe, and a blowing ring seam is formed between the end of the tapered necking and the step surface of the annular step groove A, the air inlet pipe opening is opened at the position of the tapered annular air guide cavity; a heat insulation layer is provided on the outer wall of the straight pipe; a pipe support assembly is provided at both the front and rear ends of the drying pipe; a temperature sensor 1 is provided in the drying pipe, and a temperature sensor 2 is provided in the return air duct; an air flow heating pipe is also connected to the air inlet duct.

[0005] Furthermore, an annular step groove B is provided at the end of the inner wall of the straight pipe, and an annular step groove B is provided at the return air pipe opening; an air outlet guide sleeve is provided at the end of the straight pipe, and the internal cavity of the air outlet guide sleeve is a trumpet-shaped contraction structure.

[0006] Furthermore, the air flow heating tube includes a heating tube body, a spiral guide column coaxially arranged therein is provided in the heating tube body, a spiral air flow cavity is formed between the spiral guide column and the heating tube body, and pipe interfaces are provided at both ends of the heating tube body.

[0007] Furthermore, the tube support assembly includes a base plate, a vertically arranged square tube is provided on the base plate, a lifting tube is slidably nested in the square tube, a semicircular support sleeve is fixedly provided on the top of the lifting tube, ear plates are provided at both ends of the semicircular support sleeve, and connecting holes are opened on the ear plates; the upper end of the semicircular support sleeve is provided with a semicircular fixing sleeve with the same structure and symmetrically arranged, and the semicircular support sleeve and the semicircular fixing sleeve are fixed to each other by connecting bolts passing through the connecting holes; an internal threaded sleeve is provided on one side wall of the square tube, and the internal threaded sleeve is threadedly connected to a tightening bolt, and the end of the tightening bolt passes through the square tube and fits tightly with the lifting tube.

[0008] Compared with the prior art, the present invention has the following beneficial effects: at the beginning of the drying process, the air is initially heated by the air heating box, and then the air is secondary heated by the air heating pipe, so that the hot air in the drying pipe quickly reaches the drying temperature, ensuring that the drying device can quickly enter the drying state, thereby improving the production efficiency of the metal pipe. When the hot air in the drying pipe reaches a certain temperature, the air heating pipe stops working. A portion of the hot air at the end of the drying pipe is returned to the air inlet of the fan through the return air duct, reducing the heating power of the air heating box and energy consumption. When the air temperature in the return air duct is high, only the air heating pipe is used to heat the air, further reducing energy consumption. The hot air in the conical annular air guide cavity is ejected toward the end of the drying pipe through the spray ring gap. The hot air ejected from the spray ring gap not only has a high flow rate, but also has a uniform and stable distribution of the hot air in the drying pipe and a converging effect, thereby quickly drying the ink-sprayed metal pipe and achieving high drying efficiency. The height of the drying pipe can be easily and flexibly adjusted to ensure the coaxiality of the metal pipe and the drying pipe, so as to adapt to the position adjustment of the supporting equipment of the external production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the structure of the utility model;

[0010] Figure 2 This is a schematic diagram of the internal structure of the drying tube of the utility model;

[0011] Figure 3 This is a cross-sectional view of a straight pipe of the utility model;

[0012] Figure 4 This is a partial cross-sectional view of the starting end of the drying tube of the present invention;

[0013] Figure 5 This is a partial cross-sectional view of the end of the drying tube of the present invention;

[0014] Figure 6 This is a schematic diagram of the internal structure of the airflow heating tube of the utility model;

[0015] Figure 7 This is a schematic diagram of the drying tube bracket structure of the present utility model.

[0016] In the figure: 1. Fan; 2. Air heating box; 3. Air inlet duct; 4. Drying pipe; 41. Straight pipe; 411. Air inlet pipe opening; 412. Return air pipe opening; 413. Annular step groove A; 414. Annular step groove B; 42. Blowing guide sleeve; 421. Tapered necking; 43. Air outlet guide sleeve; 44. Thermal insulation layer; 45. Conical annular air guide cavity; 451. Injection annular seam; 5. Return air duct; 6. Air flow heating pipe; 61. Heating pipe body; 62. Spiral guide column; 63. Spiral air flow cavity; 64. Pipe interface; 7. Temperature sensor 1; 8. Temperature sensor 2; 9. Pipe support assembly; 91. Bottom plate; 92. Square pipe; 93. Lifting pipe; 94. Semicircular support sleeve; 95. Semicircular fixing sleeve; 96. Ear plate; 97. Connecting bolt; 98. Internal threaded sleeve; 99. Tightening bolt. DETAILED DESCRIPTION

[0017] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0018] See also Figure 1-7 The utility model provides a technical solution: a metal tube inkjet drying device, comprising a fan 1, an air heating box 2 and a drying tube 4, the drying tube 4 comprising a straight tube 41, the two ends of the circumferential outer wall of the straight tube 41 are respectively provided with an air inlet pipe port 411 and a return air pipe port 412 connected to its internal cavity, the air outlet of the air heating box 2 is connected to the air inlet pipe port 411 through the air inlet duct 3, the air inlet of the fan 1 is connected to the return air pipe port 412 through the return air duct 5, and the air outlet of the fan 1 is connected to the air inlet of the air heating box 2 through a pipe; the circumferential outer wall of the straight tube 41 is respectively provided with an air inlet pipe port 411 and a return air pipe port 412 connected to its internal cavity, the air outlet of the air heating box 2 is connected to the air inlet pipe port 411 through the air inlet duct 3, the air inlet of the fan 1 is connected to the return air pipe port 412 through the return air duct 5, and the air outlet of the fan 1 is connected to the air inlet of the air heating box 2 through a pipe; An annular step groove A413 is provided at the starting end of the inner wall, and a blowing guide sleeve 42 is fixedly nested in the annular step groove A413. The inner end of the blowing guide sleeve 42 is a tapered necking 421, and the outer conical surface of the tapered necking 421 is bent inward along its center line. A conical annular air guide cavity 45 is formed between the tapered necking 421 of the blowing guide sleeve 42 and the annular step groove A413 of the straight tube 41, and a blowing annular gap 451 is formed between the end of the tapered necking 421 and the step surface of the annular step groove A413. The air inlet pipe port 411 is opened at the position of the conical annular air guide cavity 45.

[0019] The end of the inner wall of the straight pipe 41 is provided with an annular step groove B414, and the return air pipe port 412 is provided at the position where the annular step groove B414 is provided; the end of the straight pipe 41 is provided with an air outlet guide sleeve 43, and the inner cavity of the air outlet guide sleeve 43 is a trumpet-shaped constricted structure;

[0020] The outer wall of the straight tube 41 is provided with a heat insulation layer 44; the front and rear ends of the drying tube 4 are provided with a tube support assembly 9; the drying tube 4 is provided with a temperature sensor 7, and the return air duct 5 is provided with a temperature sensor 8;

[0021] The air inlet duct 3 is also connected to an air flow heating tube 6, which includes a heating tube body 61. A spiral guide column 62 is provided coaxially with the heating tube body 61, and a spiral air flow cavity 63 is formed between the spiral guide column 62 and the heating tube body 61. Both ends of the heating tube body 61 are provided with pipe interfaces 64.

[0022] Working principle:

[0023] When the drying device starts to operate, the metal tube after inkjet is passed through the drying tube 4 by an external traction device, and the fan 1, the air heating box 2 and the air flow heating tube 6 are turned on. The air is transported to the air heating box 2 through the fan 1, and the air heating box 2 preliminarily heats the air flow inside it. The hot air after preliminarily heating enters the air inlet duct 3. When the hot air passes through the air flow heating tube 6, the hot air is heated again by the heating tube body 61, and the hot air flowing into the heating tube body 61 flows in a spiral along the spiral air flow cavity 63, extending the flow path of the hot air and making the hot air fully contact with the inner wall of the heating tube body 61, thereby increasing the efficiency of the secondary heating of the air; the air flow after the secondary heating enters the cone ring In the conical air guide cavity 45, the hot air in the conical air guide cavity 45 is ejected toward the end of the drying tube 4 through the spraying annular gap 451. The hot air ejected from the spraying annular gap 451 not only has a fast flow rate, but also has a uniform and stable distribution of the hot air in the straight tube 41 and a converging effect, thereby quickly drying the inkjet metal tube. After the hot air in the straight tube 41 flows to its end, part of the hot air flows back to the air inlet of the fan 1 through the return air duct 5, and the other part of the hot air flows to the outside through the air outlet guide sleeve 43. The trumpet-shaped concave structure of the air outlet guide sleeve 43 and the annular step groove B414 make it easier for the hot air in the straight tube 41 to flow back to the return air duct 5. The external traction equipment pulls the metal tube to be fed continuously.

[0024] The temperature inside the straight tube 41 is detected by temperature sensor 1 7. When the airflow in the straight tube 41 reaches a certain temperature, the airflow heating tube 6 stops working, and the airflow is heated only by the air heating box 2. The temperature inside the return air duct 5 is detected by temperature sensor 2 8. When the airflow in the return air duct 5 reaches a certain temperature, the air heating box 2 stops working, and the airflow heating tube 6 is turned on to heat the airflow.

[0025] Furthermore, the tube support assembly 9 includes a bottom plate 91, a vertically arranged square tube 92 is provided on the bottom plate 91, a lifting tube 93 is slidably nested in the square tube 92, a semicircular support sleeve 94 is fixed on the top of the lifting tube 93, and ear plates 96 are provided at both ends of the semicircular support sleeve 94, and connection holes are opened on the ear plates 96; the upper end of the semicircular support sleeve 94 is provided with a semicircular fixing sleeve 95 with the same structure and symmetrical arrangement, and the semicircular support sleeve 94 and the semicircular fixing sleeve 95 are penetrated by connecting bolts 97. The connecting holes are fixed to each other; an internal threaded sleeve 98 is provided on one side wall of the square tube 92, and the internal threaded sleeve 98 is threadedly connected with a tightening bolt 99, and the end of the tightening bolt 99 passes through the square tube 92 and fits tightly with the lifting tube 93; by screwing the tightening bolt 99, the position height of the lifting tube 93 and the semicircular support sleeve 94 can be adjusted, thereby adjusting the position height of the drying tube 4, ensuring the coaxiality of the metal tube and the drying tube 4, so as to adapt to the position adjustment of the external production line supporting equipment; the position adjustment and disassembly of the drying tube 4 are flexible and convenient.

[0026] The metal tube inkjet drying device disclosed in this embodiment provides initial heating of the air by the air heating box 2 at the beginning of the drying process, followed by secondary heating of the air by the air heating tube 6, allowing the drying device to quickly enter the drying operation state and improving the production efficiency of the metal tube. When the hot air in the drying tube 4 reaches a certain temperature, the air heating tube 6 stops operating. A portion of the hot air at the end of the drying tube 4 flows back to the air inlet of the fan 1 through the return air duct 5, reducing the heating power of the air heating box 2 and energy consumption. When the air temperature in the return air duct 5 is high, the air is heated solely by the air heating tube 6, further reducing energy consumption. The hot air in the conical annular air guide cavity 45 is ejected toward the end of the drying tube 4 through the spraying annular gap 451. The hot air ejected from the spraying annular gap 451 has a high flow rate, is evenly distributed and flows smoothly within the straight tube 41, and has a converging effect, which quickly dries the ink-sprayed metal tube and achieves high drying efficiency. The drying tube 4 is easily and flexibly adjustable in height to ensure the coaxiality of the metal tube and the drying tube 4, accommodating position adjustments on external production line equipment.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A metal tube inkjet drying device, comprising a fan, an air heating box and a drying tube, characterized in that: The drying tube comprises a straight tube, and an air inlet and a return air outlet connected to the internal cavity thereof are respectively provided at both ends of the circumferential outer wall of the straight tube, the air outlet of the air heating box is connected to the air inlet outlet via the air inlet duct, the air inlet of the fan is connected to the return air outlet via the return air duct, and the air outlet of the fan is connected to the air inlet of the air heating box via the duct; an annular step groove A is provided at the starting end of the circumferential inner wall of the straight tube, and a blowing guide sleeve is fixedly nested in the annular step groove A, and the inner side end of the blowing guide sleeve is a tapered necking, and the tapered necking is The outer conical surface bends inward along its center line, and a conical annular air guide cavity is formed between the conical contraction of the blowing guide sleeve and the annular step groove A of the straight pipe, and a blowing ring gap is formed between the end of the conical contraction and the step surface of the annular step groove A. The air inlet pipe opening is opened at the position of the conical annular air guide cavity; a heat insulation layer is provided on the outer wall of the straight pipe; a pipe support assembly is provided at both the front and rear ends of the drying pipe; a temperature sensor 1 is provided in the drying pipe, and a temperature sensor 2 is provided in the return air duct; an air flow heating pipe is also connected to the air inlet duct.

2. The metal tube inkjet drying device according to claim 1, characterized in that: An annular step groove B is provided at the end of the inner wall of the straight pipe, and the return air pipe opening is provided at the position where the annular step groove B is provided; an air outlet guide sleeve is provided at the end of the straight pipe, and the internal cavity of the air outlet guide sleeve is a trumpet-shaped contraction structure.

3. The metal tube inkjet drying device according to claim 1, characterized in that: The airflow heating tube includes a heating tube body, a spiral guide column coaxially arranged therein, a spiral airflow cavity is formed between the spiral guide column and the heating tube body, and pipe interfaces are provided at both ends of the heating tube body.

4. The metal tube inkjet drying device according to claim 1, characterized in that: The tube support assembly includes a base plate, a vertically arranged square tube is provided on the base plate, a lifting tube is slidably nested in the square tube, a semicircular support sleeve is fixedly provided on the top of the lifting tube, ear plates are provided at both ends of the semicircular support sleeve, and connecting holes are opened on the ear plates; the upper end of the semicircular support sleeve is provided with a semicircular fixing sleeve with the same structure and symmetrically arranged, and the semicircular support sleeve and the semicircular fixing sleeve are fixed to each other by connecting bolts passing through the connecting holes; an internal threaded sleeve is provided on one side wall of the square tube, and the internal threaded sleeve is threadedly connected to a tightening bolt, and the end of the tightening bolt passes through the square tube and fits tightly with the lifting tube.

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