CN115171980A - Cable painting production line - Google Patents

Abstract

The invention discloses a cable painting production line, which belongs to the field of cable production. In order to solve the problem of uneven thickness of the paint layer on the surface of the cable, the cable painting production line comprises a pay-off device (1) and a paint device (2) arranged in sequence. ), vertical drying equipment (3) and wire take-up device (5), vertical drying equipment (3) contains drying gas supply device (32) and upright drying pipeline (31), drying gas supply device (32) ) can supply gas for drying the cable paint into the drying duct (31). The cable painting production line adopts the vertical layout of drying pipes, which eliminates the uneven wall hanging of the paint layer in the horizontal layout, and the vertical layout effectively utilizes the vertical space and reduces the area occupied by the construction of the production plant.

Description

A cable painting production line

technical field

The invention relates to the technical field of cable production, in particular to a cable painting production line.

Background technique

Spray coating on the surface of the cable is one of the effective ways to increase the mechanical strength, moisture resistance, oil resistance and corrosion resistance of the cable. The current traditional painting equipment adopts the method of "horizontal layout and horizontal dipping", and is carried out with electric heating and drying equipment. This kind of painting equipment has the following defects:

1. Due to the gravity factor, the method of horizontal dipping often has uneven paint layer hanging on the wall, especially a large number of "thin upper and lower thick" phenomenon.

2. Considering the length of the production line, the traditional painting production line has low production speed due to the efficiency of drying equipment, which greatly affects the efficiency of product delivery.

3. Electric heating drying equipment has the defects of high energy consumption, fragile equipment and high maintenance cost.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned problem of "the upper part is thin and the lower part is thick" in the existing horizontal layout of cable painting, the present invention provides a cable painting production line, which adopts the vertical layout of drying pipes, which eliminates the need for horizontal painting. There is uneven paint layer hanging on the wall in the layout, and the vertical layout effectively utilizes the vertical space to reduce the area occupied by the construction of the production plant.

The technical scheme adopted by the present invention to solve its technical problems is:

A cable painting production line, comprising a pay-off device, a paint device, a vertical drying device and a wire take-up device arranged in sequence, the vertical drying device includes a drying gas supply device and a vertical drying pipeline, and the drying gas supply device The gas for the drying of the cable paint can be supplied into the drying duct.

The beneficial effects of the present invention are:

1. The horizontal layout is more vertical, which eliminates the uneven wall hanging of the paint layer in the horizontal layout, and the vertical layout effectively utilizes the vertical space, reducing the area occupied by the construction of the production plant.

2. The take-up and pay-out system is equipped with "double release and double take-up" for the double-slot guide wheel group, which can realize the simultaneous production of two cables and double the production efficiency.

3. The drying equipment adopts the method of steam + waste heat + secondary drying, compared with the method of electric heating, to achieve high efficiency and energy saving, and multiple step drying can effectively achieve the stability of the paint layer and avoid the paint layer drying and cracking caused by sudden temperature changes. .

Description of drawings

The accompanying drawings forming a part of the present application are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

FIG. 1 is a schematic front view of the cable painting production line according to the present invention.

FIG. 2 is a schematic diagram of heating of the cable painting production line according to the present invention.

Figure 3 is a schematic diagram of a painting apparatus.

FIG. 4 is a schematic perspective view of the descending drying section.

5 is a schematic cross-sectional view of the descending drying section.

FIG. 6 is a schematic top view of the wire pay-off device and the wire take-up device.

The reference numerals are explained as follows:

1. Pay-off device; 2. Painting device; 3. Vertical drying equipment; 4. Secondary oven; 5. Reeling device; 6. Negative pressure ventilation system; 7. Waste heat exchange equipment; 8. Cable;

11. Pay-off stand; 12. Pay-off reel; 13. The first steering guide wheel;

21, paint storage tank; 22, self-priming pump; 23, paint delivery pipeline; 24, non-contact liquid level sensor; 25, paint tank; 26, paint guide wheel;

31. Drying pipeline; 32. Drying gas supply device; 33. Main steam pipeline; 34. Branch steam pipeline;

41. The third steering wheel; 42. The fourth steering wheel;

51. Take-up stand; 52. Take-up reel;

61. Air outlet;

71. Secondary drying fan; 72. Waste heat heat exchanger; 73. Steam circulating water device; 74. Heat source supply pipeline;

311, ascending drying section; 312, descending drying section; 313, second steering wheel; 314, inner layer; 315, middle layer; 316, outer layer; 317, inner spiral groove; 318, outer spiral groove;

321, steam hot air blower; 322, steam heat exchanger.

Detailed ways

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

A cable painting production line, comprising a pay-off device 1, a paint device 2, a vertical drying device 3 and a wire take-up device 5 arranged in sequence, and the vertical drying device 3 contains a drying gas supply device 32 and an upright drying pipeline 31. The drying gas supply device 32 can supply the gas used for cable painting and drying in the drying pipeline 31, and the cable 8 can be dried in the drying pipeline 31 in an upright state after painting, as shown in Figure 1 and Figure 1. 2 shown.

In the present embodiment, the pay-off device 1 is a double pay-off structure, and the pay-off device 1 includes two pay-off racks 11 and two pay-off reels 12 arranged side by side. There is a first steering guide wheel 13 between the pay-off device 1 and the paint device 2, the wire take-up device 5 is a double take-up structure, and the wire take-up device 5 includes two wire take-up racks 51 and two wire take-up reels 52 arranged side by side , a take-up reel 52 is located on a take-up frame 51 .

The axis of the pay-off reel 12 , the axis of the first steering guide wheel 13 and the axis of the take-up reel 52 are all horizontal. The function of the first steering guide wheel 13 is to guide the cable 8 into the painting device 2 . On the whole, two cables 8 can be produced at the same time through "double release and double receipt", so as to double the production efficiency, as shown in Fig. 6 .

In this embodiment, the painting device 2 includes a paint storage tank 21, a paint delivery pipeline 23 and a paint tank 25 which are connected in sequence. The paint tank 25 is provided with a paint guide wheel 26, and the paint guide wheel 26 is located in the drying pipeline 31. below. The role of the paint guide wheel 26 is to press the cable 8 into the paint liquid in the paint tank 25 (paint the surface of the cable 8 ).

In this embodiment, the paint delivery pipeline 23 is provided with a self-priming pump 22, the side wall of the paint tank 25 is provided with a non-contact liquid level sensor 24, and the cable painting production line also includes a control unit self-priming pump 22 and The non-contact liquid level sensors 24 are all connected to the control unit, and the non-contact liquid level sensors 24 can start and stop the self-priming pump 22 according to the detected liquid level in the paint tank 25 , as shown in FIG. 3 .

The non-contact liquid level sensor 24 is used to detect the liquid level of the paint liquid in the paint tank 25. When the liquid level reaches a preset liquid level, the vertical self-priming pump 22 stops running; when the liquid level is lower than the preset liquid level When there is a certain deviation, the control unit starts the vertical self-priming pump 22 to supply paint, so that the paint liquid in the paint storage tank 21 enters the paint tank 25 through the paint delivery pipeline 23 to ensure that the liquid level in the paint tank 25 is stable.

In this embodiment, the drying pipeline 31 includes an ascending drying section 311 and a descending drying section 312 arranged in sequence. The ascending drying section 311 and the descending drying section 312 are both upright tubular structures, and the descending drying section 312 and The ascending drying section 311 is arranged symmetrically on the left and right, and a second steering guide wheel 313 is arranged between the ascending drying section 311 and the descending drying section 312. The cable 8 leaving the ascending drying section 311 can bypass the second steering guide wheel 313. Enter the descending drying section 312, as shown in FIG. 1 and FIG. 2 .

After the cable 8 is painted on the inner surface of the paint tank 25, first the cable 8 enters the ascending drying section 311, the cable 8 is in an upright state in the ascending drying section 311, and the cable 8 travels upright in the ascending drying section 311; 8 enters the descending drying section 312, the cable 8 is in an upright state in the descending drying section 312, and the cable 8 travels upright and downward in the descending drying section 312. The function of the second steering pulley 313 is to change the traveling direction of the cable 8 .

In this embodiment, the cable painting production line also includes a main steam pipeline 33, and the drying gas supply device 32 contains a steam hot air blower 321 and a steam heat exchanger 322 (also referred to as a steam heat exchange pipeline), and the steam heat exchange The heat exchanger 322 can be an existing gas-steam heat exchanger, the main steam pipe 33 is connected with the heat release medium inlet of the steam heat exchanger 322 through the branch steam pipe 34, and the outlet of the steam hot air blower 321 is connected with the heat absorption of the steam heat exchanger 322. The medium inlet is connected, the drying gas inlet of the descending drying section 312 is connected with the heat-absorbing medium outlet of the steam heat exchanger 322, and the drying gas inlet of the descending drying section 312 and the heat-absorbing medium outlet of the steam heat exchanger 322 adopt Y Type tee structure connection, as shown in Figure 2 and Figure 5.

The steam in the branch steam pipe 34 releases heat in the steam heat exchanger 322, the air blown by the steam hot air blower 321 absorbs heat in the steam heat exchanger 322, and the high temperature air after the heat absorption is blown into the drying pipe 31 by the steam hot air blower 321. (The descending drying section 312 and the ascending drying section 311), the high temperature air after absorbing heat dries the cable 8 in the drying pipeline 31, and accelerates the drying and solidification of the surface paint layer of the cable 8.

The connection between the drying gas supply device 32 and the descending drying section 312 is the same as the connection between the drying gas supply device 32 and the ascending drying section 311 . That is, the cable painting production line includes two drying gas supply devices 32 connected in parallel. The two drying gas supply devices 32 are respectively connected with the descending drying section 312 and the ascending drying section 311. High temperature air is supplied to the descending drying section 312 and the ascending drying section 311, respectively.

The specific connection relationship is as follows:

In the first drying gas supply device 32, the connection relationship between the drying gas supply device 32 and the descending drying section 312 is: the main steam pipeline 33 is connected to the heat release medium inlet of the steam heat exchanger 322 through the branch steam pipeline 34 , the outlet of the steam hot air blower 321 is communicated with the heat absorption medium inlet of the steam heat exchanger 322 , and the drying gas inlet of the descending drying section 312 is communicated with the heat absorption medium outlet of the steam heat exchanger 322 .

In the second drying gas supply device 32, the connection relationship between the drying gas supply device 32 and the ascending drying section 311 is as follows: the main steam pipe 33 is connected to the heat release medium inlet of the steam heat exchanger 322 through the branch steam pipe 34 , the outlet of the steam hot air blower 321 is communicated with the heat-absorbing medium inlet of the steam heat exchanger 322 , and the drying gas inlet of the ascending drying section 311 is communicated with the heat-absorbing medium outlet of the steam heat exchanger 322 .

In this embodiment, the structures of the descending drying section 312 and the ascending drying section 311 are basically the same, and the drying duct 31 includes an inner layer 314, a middle layer 315 and an outer layer 316 which are sequentially sleeved from the inside to the outside, that is, the descending drying section. 312 and the ascending drying section 311 both contain an inner layer 314, a middle layer 315 and an outer layer 316 which are sleeved from the inside to the outside in sequence. The inner surface of the inner layer 314 is provided with an inner spiral groove 317, the material of the middle layer 315 is an inorganic thermal insulation material (such as rock wool or glass wool), and the outer surface of the outer layer 316 is provided with an outer spiral groove 318, as shown in Figure 4 .

The drying gas inlet of the ascending drying section 311 is located at the upper part of the ascending drying section 311 , (the inner spiral groove 317 in the ascending drying section 311 can enable) the high temperature air to descend spirally in the ascending drying section 311 . The drying gas inlet of the descending drying section 312 is located at the lower part of the descending drying section 312, (the inner spiral groove 317 in the descending drying section 312 enables) the high temperature air to spirally rise in the descending drying section 312.

In this embodiment, the cable painting production line also includes a secondary oven 4 and a waste heat exchange device 7. The waste heat exchange device 7 includes a secondary drying fan 71, a waste heat heat exchanger 72 and a steam circulating water device 73. The oven 4 is located between the vertical drying device 3 and the wire take-up device 5 . The cable 8 can enter the secondary oven 4 after leaving the vertical drying device 3 , and can be wound by the wire take-up device 5 after the cable 8 leaves the secondary oven 4 . The secondary oven 4 may be of vertical or horizontal configuration, ie the (respective) cables 8 may run upright or horizontally in the secondary oven 4 . Preferably, the secondary oven 4 is a horizontal structure, and the cable 8 can run horizontally in the secondary oven 4 .

In this embodiment, the waste heat heat exchanger 72 can be an existing gas-steam heat exchanger, the outlet of the secondary drying fan 71 is communicated with the heat absorption medium inlet of the waste heat heat exchanger 72, and the drying of the secondary drying oven 4 The gas inlet is communicated with the heat absorbing medium outlet of the waste heat heat exchanger 72 , the main steam pipe 33 is communicated with the first heat releasing medium inlet of the waste heat heat exchanger 72 , and the heat releasing medium outlet of the steam heat exchanger 322 is connected with the waste heat heat exchanger 72 The second exothermic medium inlet of the waste heat exchanger 72 is connected with a heat source supply line 74, and the heat source supply line 74 can be connected with other heat sources. The inlet of the steam circulating water device 73 exchanges heat with the waste heat. The outlet of the exothermic medium of the boiler 72 is connected to each other, and the steam circulating water device 73 can adopt the products of the prior art. The steam circulating water device 73 can convert the exothermic steam into water, heat the water into steam, and then enter the main steam pipeline 33, thereby Form a soda water cycle.

The steam released by the steam heat exchanger 322 can enter the waste heat heat exchanger 72 to release heat, the steam in the main steam pipeline 33 can enter the waste heat heat exchanger 72 to release heat, and other heat sources can also enter the waste heat heat exchanger 72. Heat is released, the air blown by the secondary drying fan 71 absorbs heat in the waste heat heat exchanger 72, and the high-temperature air after the heat absorption is blown into the secondary oven 4 by the secondary drying fan 71, and the high-temperature air after the endothermic is in the second oven 4. The cable 8 is dried in the secondary oven 4 .

It can be understood that the drying pipeline 31 dries the cable 8 for the first time, and the secondary drying oven 4 dries the cable 8 for the second time. A third steering guide wheel 41 is provided outside the inlet end of the secondary drying oven 4 , and a fourth steering guide wheel 42 is provided outside the outlet end of the secondary drying oven 4 . The functions of the third steering guide wheel 41 and the fourth steering guide wheel 42 are to guide the cable 8 to change the direction of travel. The entrance of 41 is located just below the descending drying section 312 , and the exit of the paint guide wheel 26 is located just below the ascending drying section 311 .

The hot air control system mainly controls the internal temperature of the primary and secondary drying equipment. The primary drying equipment adopts the PID control mode. First, the temperature control of the machine is realized through the preset drying equipment temperature, and the subsequent drying equipment feedbacks the actual temperature through the actual production temperature sensor. The deviation between the temperature and the preset temperature is used as the input of the PLC control module, and the fan speed and air volume are controlled according to the deviation value to reduce the deviation value, and finally achieve the purpose of stable temperature control of the primary drying equipment. The secondary drying equipment adopts waste heat equipment to connect with the air compressor for blowing to increase the drying time, and the drying is graded, which can effectively avoid the dry cracking of the paint layer caused by the rapid temperature change. For the steam after primary drying to complete heat exchange through the waste heat heat exchanger 72, the heat exchange equipment is equipped with a solenoid valve, which can increase the external waste heat source (and other heat sources) to ensure the heat exchange effect. The high-temperature gas enters the secondary oven 4, and multiple groups of nozzles can be arranged inside the secondary oven 4 to realize secondary drying of the painted cable 8.

In this embodiment, the cable painting production line includes a negative pressure air extraction system 6, and the negative pressure air extraction system 6 contains a plurality of air extraction openings 61, and the air extraction openings 61 correspond to the main production devices capable of producing volatile substances. Each air outlet 61 corresponds to the painting device 2 , the vertical drying device 3 , the secondary oven 4 and the wire take-up device 5 one by one. The negative pressure exhaust system 6 also includes a negative pressure exhaust fan. The negative pressure exhaust fan is used in conjunction with environmental protection equipment for compliance emission control. It is mainly used to eliminate the smell of paint in the workshop and achieve the purpose of environmental protection discharge, as shown in Figure 1 and Figure 2.

The working process of the cable painting production line is described below.

1. After the cable 8 is released by the pay-off device 1, the cable 8 enters the paint tank 25 of the paint device 2 for painting.

2. The painted cable 8 enters the ascending drying section 311 and the descending drying section 312 of the vertical drying equipment 3 in sequence, and the cable 8 is dried once.

3. The cable 8 after the primary drying enters the secondary drying oven 4 to complete the secondary drying.

4. The cable 8 after the secondary drying is wound up by the wire take-up device 5 .

In order to facilitate understanding and description, the present invention adopts the absolute positional relationship for expression. Unless otherwise specified, the azimuth word "up" indicates the direction of the upper side of Fig. 1, and "down" indicates the direction of the lower side of Fig. 1. "Left" represents the direction on the left side of Fig. 1, and "right" represents the direction on the right side of Fig. 1. The present invention is described using the viewing angle of the reader or user, but the above-mentioned orientation words cannot be understood or interpreted as a reference to the present invention. Limitation of the scope of protection of the invention.

The above descriptions are only specific embodiments of the present invention, and cannot limit the scope of implementation of the invention. Therefore, the replacement of equivalent components, or the equivalent changes and modifications made according to the scope of the patent protection of the present invention should still be covered by this patent. category. In addition, the technical features and technical features, technical features and technical solutions, technical solutions and technical solutions, and embodiments and embodiments in the present invention can be freely combined and used.

Claims (10)

1. a cable painting production line, it is characterized in that, described cable painting production line comprises the pay-off device (1), the paint device (2), the vertical drying equipment (3) and the wire take-up device (5) that are arranged successively ), the vertical drying equipment (3) contains a drying gas supply device (32) and an upright drying pipeline (31), and the drying gas supply device (32) can supply the drying pipeline (31) for cable coating Paint drying gas. 2. The cable painting production line according to claim 1, characterized in that the pay-off device (1) is a double pay-off structure, and the pay-off device (1) contains two pay-off racks (11) and two pay-off reels (12), a first steering guide wheel (13) is arranged between the wire pay-off device (1) and the paint device (2), the wire take-up device (5) is a double take-up structure, and the wire take-up device (5) contains two A wire take-up frame (51) and two wire take-up reels (52). 3. The cable painting production line according to claim 1, wherein the painting device (2) contains a paint storage tank (21), a paint delivery pipeline (23) and a paint tank (25) connected in sequence, and the paint tank (25) is provided with a paint guide wheel (26), and the paint guide wheel (26) is located below the drying duct (31). 4. The cable painting production line according to claim 3, wherein a self-priming pump (22) is arranged on the paint delivery pipeline (23), and a non-contact liquid level is arranged on the side wall of the paint tank (25). The sensor (24), the non-contact liquid level sensor (24) can start and stop the self-priming pump (22) according to the detected liquid level in the paint tank (25). 5. The cable painting production line according to claim 1, characterized in that the drying pipeline (31) contains an ascending drying section (311) and a descending drying section (312) that are arranged in sequence, and the ascending drying section (311) ) and the descending drying section (312) are in an upright state, the descending drying section (312) and the ascending drying section (311) are arranged symmetrically on the left and right, and the ascending drying section (311) and the descending drying section (312) are located between the A second turning guide wheel (313) is provided, and the cable (8) leaving the ascending drying section (311) can bypass the second turning guide wheel (313) and then enter the descending drying section (312). 6. The cable painting production line according to claim 5, wherein the cable painting production line also comprises a main steam pipeline (33), and the drying gas supply device (32) contains a steam hot air blower (321) and a steam The heat exchanger (322), the main steam pipeline (33) is connected with the heat release medium inlet of the steam heat exchanger (322) through the branch steam pipeline (34), and the outlet of the steam hot air blower (321) is connected with the steam heat exchanger (322) ) is communicated with the endothermic medium inlet of ), and the drying gas inlet of the descending drying section (312) is communicated with the endothermic medium outlet of the steam heat exchanger (322). 7. The cable painting production line according to claim 6, characterized in that, the connection mode of the drying gas supply device (32) and the descending drying section (312) and the drying gas supply device (32) and the rising drying Sections (311) are connected in the same way. 8. The cable painting production line according to claim 1, wherein the drying duct (31) contains an inner layer (314), a middle layer (315) and an outer layer (316) which are sequentially arranged from the inside to the outside. The inner surface of (314) is provided with an inner spiral groove (317), the material of the middle layer (315) is an inorganic thermal insulation material, and the outer surface of the outer layer (316) is provided with an outer spiral groove (318). 9. The cable painting production line according to claim 7, wherein the cable painting production line also comprises a secondary oven (4) and a waste heat exchange device (7), and the waste heat exchange device (7) contains a secondary oven A drying fan (71), a waste heat heat exchanger (72) and a steam circulating water device (73), the secondary drying oven (4) is located between the vertical drying device (3) and the wire take-up device (5), and the cable (8) After leaving the vertical drying equipment (3), it can enter the secondary drying oven (4), and the outlet of the secondary drying fan (71) is communicated with the heat absorption medium inlet of the waste heat The drying gas inlet is communicated with the heat absorbing medium outlet of the waste heat heat exchanger (72), and the main steam pipe (33) is communicated with the first heat releasing medium inlet of the waste heat heat exchanger (72). The heat release medium outlet is communicated with the second heat release medium inlet of the waste heat heat exchanger (72), and the third heat release medium inlet of the waste heat heat exchanger (72) is externally connected with a heat source supply line (74), and the steam circulating water device ( The inlet of 73) communicates with the outlet of the exothermic medium of the waste heat heat exchanger (72). 10. The cable painting production line according to claim 9, wherein the cable painting production line comprises a negative pressure air extraction system (6), and the negative pressure air extraction system (6) contains a plurality of air extraction ports (61), and a plurality of air extraction ports (61). Each air outlet (61) corresponds to the painting device (2), the vertical drying device (3), the secondary oven (4) and the wire take-up device (5) one by one.

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