A slurry coating device and a coating method for the inner wall of a copper tube

Abstract

The present application belongs to the technical field of slurry coating, and particularly relates to a copper pipe inner wall slurry coating device and a coating method. The copper pipe inner wall slurry coating device comprises a parameter control module and a side face dispensing module, a rotary coating module and a heating and drying module electrically connected to the parameter control module. The side face dispensing module comprises a side face dispensing needle head, one end of which is connected to a barrel, and the other end is closed and provided with a discharge port on the side wall. The side face dispensing needle head can move left and right relative to the rotary coating module. The rotary coating module comprises a platform, both ends of which are provided with support plates, and the support plates are provided with support rods and rotary rollers. The copper pipe to be coated is rotated under the drive of the rotary rollers. The heating and drying module comprises a heating device and a clamping device. The coating device utilizes the fluidity of the slurry and uniformly coats the slurry on the inner wall of the copper pipe through the rotation of the copper pipe, and is suitable for processing pipes with a diameter of less than or equal to 10 mm and a length of greater than or equal to 200 mm in a limited space.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of slurry coating, and particularly relates to a copper pipe inner wall slurry coating device and a coating method. BACKGROUND

[0002] The forming technology of liquid slurry coating in a pipe mainly uses a spraying form for processing. This kind of processing technology is suitable for pipes with a large diameter. For pipes with a diameter of less than or equal to 10 mm and a length of more than or equal to 200 mm, it is difficult for a spray gun to enter such a small space, and the processing space is limited.

[0003] Dispensing is a method of applying liquid material to the surface of a product. However, in the traditional dispensing process, liquid slurry is applied from the front. Due to factors such as the length of the dispensing needle and the viscosity of the liquid slurry, it is difficult to process pipes with a diameter of less than or equal to 10 mm and a length of more than or equal to 200 mm. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art and provide a copper pipe inner wall slurry coating method. The coating device of the present application utilizes the fluidity of the slurry and uniformly coats the slurry on the inner wall of the copper pipe through copper pipe rotation, which is suitable for processing pipes with a diameter of less than or equal to 10 mm and a length of more than or equal to 200 mm with limited processing space.

[0005] To achieve the above technical purposes, the technical solutions adopted by the embodiments of the present application are as follows:

[0006] In a first aspect, the embodiments of the present application provide a copper pipe inner wall slurry coating device, which comprises a parameter control module and a side dispensing module, a rotary coating module and a heating and drying module electrically connected to the parameter control module.

[0007] The side dispensing module comprises a side dispensing needle, one end of which is connected to a barrel, and the other end is closed and has a discharge port formed on the side wall. The side dispensing needle can move left and right relative to the rotary coating module.

[0008] The rotary coating module can move forward and backward relative to the heating and drying module. The rotary coating module comprises a platform, both ends of which are provided with support plates. The support plates are provided with support rods and rotary rollers. The copper pipe to be coated is rotated under the drive of the rotary rollers.

[0009] The heating and drying module comprises a heating device and a clamping device. The heating device is used to heat the copper pipe to be coated, and the clamping device is used to clamp the copper pipe to be coated.

[0010] Further, the side glue dispensing module further comprises a flow meter for monitoring the amount of slurry entering the side glue dispensing needle and a first guide rail, the side glue dispensing needle being capable of moving left and right relative to the copper pipe to be coated on the first guide rail.

[0011] Further, the rotary coating module is arranged at the right end of the side glue dispensing module, the rotary coating module further comprising a second guide rail and a motor capable of driving the rotary roller to rotate, the motor being electrically connected with the parameter control module.

[0012] Further, the rotary roller comprises a pair of driving rotary rollers, a large rotary roller and a small rotary roller, the copper pipe to be coated being placed in a space enclosed by the driving rotary rollers, the large rotary roller and the small rotary roller.

[0013] The motor drives the driving rotary roller to rotate, the driving rotary roller drives the copper pipe to be coated to rotate, and the copper pipe to be coated drives the large rotary roller and the small rotary roller to rotate.

[0014] Further, the heating device has a heating cavity capable of accommodating and heating the copper pipe to be coated.

[0015] Further, the clamping device comprises a clamping pipe, the inner diameter of the clamping pipe being equal to or slightly larger than the outer diameter of the copper pipe to be coated, one end of the copper pipe to be coated being clamped in the clamping pipe, and the clamping pipe being capable of rotating with the copper pipe to be coated.

[0016] Further, the side glue dispensing needle and the copper pipe to be coated move on the first guide rail and the second guide rail respectively under the driving of a pneumatic cylinder, the pneumatic cylinder being electrically connected with the parameter control module.

[0017] In a second aspect, the embodiment of the present application provides a method for coating slurry on the inner wall of a copper pipe, which is performed on the coating device described above and comprises the following steps:

[0018] Step S1, preparing slurry: mixing copper powder, binder and organic foaming agent according to a certain mass ratio, and injecting the obtained slurry into a barrel through ultrasonic assisted stirring;

[0019] Step S2, rotary coating: setting the related parameters of the parameter control module, moving the side glue dispensing needle to the right at a certain speed, quantitatively filling the slurry stored in the barrel into the copper pipe to be coated through the side glue dispensing needle, rotating the copper pipe to be coated under the driving of the driving rotary roller, and restoring the side glue dispensing needle to the original position after the slurry is uniformly coated on the inner wall of the copper pipe.

[0020] Step S3, drying: the copper pipe to be coated is moved to the heating cavity of the heating device for heating and drying, the drying temperature is 80-250 DEG C, the drying time is 1-30 min, and after drying, the coated copper pipe is returned to the original position and taken out after cooling.

[0021] Further, the binder in step S1 is polyvinyl alcohol with a concentration of 5%-15%, the mass ratio of copper powder to binder is 1:0.4-1:2, the mass ratio of copper powder to organic foaming agent is 1:0.005-1:0.03, the particle size of copper powder is 25-180 mu m, and the stirring speed is 300-1000 r / min.

[0022] Further, the rotating speed of the copper pipe to be coated in step S2 is 0.1-5 r / min, and the dispensing speed is 6000-15000 mm / min.

[0023] The technical scheme provided by the embodiment of the application has the following beneficial effects:

[0024] The copper pipe inner wall slurry coating device provided by the embodiment of the application comprises a parameter control module and a side dispensing module, a rotary coating module and a heating and drying module electrically connected with the parameter control module, wherein the parameter control module is used for controlling the related parameters of the coating device, the coating device can realize uniform coating of the slurry on the inner wall of the copper pipe, and the coating amount of the slurry is controllable, and is especially suitable for coating the inner wall of a copper pipe with a diameter of ≤10 mm and a length of ≥200 mm in a limited space.

[0025] The copper slurry can be injected into the copper pipe by the side dispensing method, the process is simple, the copper slurry is uniformly coated on the inner wall of the copper pipe by using the fluidity of the copper slurry and the rotation of the copper pipe, and a liquid absorption core with different thicknesses can be obtained through subsequent processing. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the front view of the copper pipe inner wall slurry coating device in the embodiment of the application.

[0027] Figure 2 is the left view of the copper pipe inner wall slurry coating device in the embodiment of the application.

[0028] Figure 3 is the top view of the copper pipe inner wall slurry coating device in the embodiment of the application.

[0029] BRIEF DESCRIPTION OF DRAWINGS 1- barrel; 2- flowmeter; 3- side dispensing needle; 4- copper pipe to be coated; 5- first guide rail; 6- heating device; 7- clamping device; 8- platform; 9- support plate; 10- support rod; 11- motor; 12- second guide rail; 13- driving rotary roller; 14- large rotary roller; 15- small rotary roller; 16- control panel; 71- clamping pipe. DETAILED DESCRIPTION

[0030] In the description of the present application, it should be understood that the orientation words such as "inner", "outer", "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate and imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, unless otherwise stated, and therefore cannot be understood as a limitation on the scope of protection of the present application.

[0031] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application. Example 1

[0032] A copper pipe inner wall slurry coating device, comprising a parameter control module and a side dispensing module, a rotary coating module and a heating and drying module electrically connected with the parameter control module;

[0033] The side dispensing module comprises a side dispensing needle head 3, one end of the side dispensing needle head 3 is connected with a barrel 1, the other end is closed and has a discharge port opened on the side wall, and the side dispensing needle head 3 can move left and right relative to the rotary coating module;

[0034] The rotary coating module can move forward and backward relative to the heating and drying module, and the rotary coating module comprises a platform 8, both ends of the platform 8 are provided with support plates 9, the support plates 9 are provided with support rods 10 and rotary rollers, and the copper pipe 4 to be coated is rotated under the driving of the rotary rollers;

[0035] The rotary coating module is arranged at the right end of the side dispensing module, and the rotary coating module further comprises a motor 11 capable of driving the rotary rollers to rotate and a second guide rail 12, and the motor 11 is electrically connected with the parameter control module;

[0036] The heating and drying module comprises a heating device 6 and a clamping device 7, the heating device 6 is used for heating the copper pipe 4 to be coated, and the clamping device 7 is arranged at the left end of the copper pipe 4 to be coated and is used for clamping the copper pipe 4 to be coated.

[0037] The side dispensing module further comprises a flow meter 2 for monitoring the amount of slurry entering the side dispensing needle head 3 and a first guide rail 5, and the side dispensing needle head 3 can move left and right relative to the copper pipe 4 to be coated on the first guide rail 5.

[0038] The rotating roller comprises a pair of driving rotating rollers 13, a large rotating roller 14 and a small rotating roller 15 symmetrically arranged at two ends of the support plate 9, wherein the driving rotating rollers 13, the large rotating roller 14 and the small rotating roller 15 at the two ends are tangentially arranged, and the driving rotating rollers 13, the large rotating roller 14 and the small rotating roller 15 enclose a triangular space, and the copper pipe 4 to be coated is placed in the triangular space.

[0039] In order to reduce the abrasion of the rotating roller to the copper pipe 4 to be coated, a rubber layer is coated on the surface of the driving rotating roller 13, the large rotating roller 14 and the small rotating roller 15.

[0040] The motor 11 drives the driving rotating roller 13 to rotate, the driving rotating roller 13 drives the copper pipe 4 to be coated to rotate, and the copper pipe 4 to be coated drives the large rotating roller 14 and the small rotating roller 15 to rotate.

[0041] Specifically, the driving rotating roller 13 is arranged on the support rod 10, and the motor drives the driving rotating roller 13 to rotate through the belt pulley and the support rod 10; the large rotating roller 14 and the small rotating roller 15 are arranged on the support plate 9, and the copper pipe 4 to be coated drives the large rotating roller 14 and the small rotating roller 15 to rotate.

[0042] The heating device 6 has a heating cavity capable of accommodating and heating the copper pipe 4 to be coated; specifically, the side wall of the heating cavity is open, and the copper pipe 4 to be coated enters the heating cavity from the side wall opening.

[0043] It is common knowledge to heat an object by a heating device, as long as the heating of the copper pipe to be coated can be achieved, and the working principle and specific form of the heating device are not limited in the present application.

[0044] The clamping device 7 comprises a clamping pipe 71, the inner diameter of the clamping pipe 71 is equal to or slightly larger than the outer diameter of the copper pipe 4 to be coated, one end of the copper pipe 4 to be coated is clamped in the clamping pipe 71, and the clamping pipe 71 can rotate with the copper pipe 4 to be coated.

[0045] The side glue dispensing needle 3 and the copper pipe 4 to be coated move on the first guide rail 5 and the second guide rail 12 respectively under the driving of the air cylinder, and the air cylinder is electrically connected with the parameter control module; the parameter control module is used for controlling the amount of slurry entering the side glue dispensing needle 3 and the movement parameters of the side glue dispensing needle 3 and the copper pipe 4 to be coated.

[0046] The outer diameter of the side glue dispensing needle 3 is smaller than the inner diameter of the copper pipe 4 to be coated.

[0047] In order to facilitate the control of various parameters, the parameter control module is provided with a control panel 16, and the control of the related parameters of the side glue dispensing module, the rotating coating module and the heating and drying module is realized through the setting of the parameters on the control panel 16. Embodiment 2

[0048] A slurry coating method for the inner wall of a copper pipe was carried out on the coating device in Embodiment 1, comprising the following steps:

[0049] Step S1, slurry preparation: copper powder, binder and organic foaming agent were mixed in a certain mass ratio, and the required slurry was obtained by ultrasonic assisted stirring, and the slurry was injected into the barrel 1;

[0050] Step S2, rotary coating: the related parameters of the parameter control module were set, the side dispensing needle 3 moved to the right at a certain speed, after entering the to-be-coated copper pipe 4, the slurry stored in the barrel 1 was quantitatively filled into the to-be-coated copper pipe 4 through the side dispensing needle 3, the to-be-coated copper pipe 4 was rotated under the drive of the driving rotary roller 13, after the slurry was uniformly coated on the inner wall of the copper pipe, the side dispensing needle 3 returned to the original position;

[0051] Step S3, drying: the to-be-coated copper pipe 4 moved to the heating cavity of the heating device 6 for heating and drying, the drying temperature was 150℃, the drying time was 10min, after drying was completed, the coated copper pipe 4 returned to the original position, and after cooling, it was taken down, the thickness of the slurry layer was 0.35mm.

[0052] In step S1, the binder was polyvinyl alcohol with a concentration of 15%, the mass ratio of copper powder to binder was 1:1.5, the mass ratio of copper powder to organic foaming agent was 1:0.005, the organic foaming agent was one of sulfonamide foaming agent, azo foaming agent or nitroso foaming agent, the mass of copper powder was 100g, the particle size of copper powder was 164μm, the stirring speed was 900r / min, and the ultrasonic frequency was 40kHZ.

[0053] In step S2, the rotating speed of the to-be-coated copper pipe 4 was 0.2r / min, and the dispensing speed was 6000mm / min. Embodiment 3

[0054] A slurry coating method for the inner wall of a copper pipe was carried out on the coating device in Embodiment 1, comprising the following steps:

[0055] Step S1, slurry preparation: copper powder, binder and organic foaming agent were mixed in a certain mass ratio, and the required slurry was obtained by ultrasonic assisted stirring, and the slurry was injected into the barrel 1;

[0056] Step S2, rotary coating: the related parameters of the parameter control module were set, the side dispensing needle 3 moved to the right at a certain speed, after entering the to-be-coated copper pipe 4, the slurry stored in the barrel 1 was quantitatively filled into the to-be-coated copper pipe 4 through the side dispensing needle 3, the to-be-coated copper pipe 4 was rotated under the drive of the driving rotary roller 13, after the slurry was uniformly coated on the inner wall of the copper pipe, the side dispensing needle 3 returned to the original position;

[0057] Step S3, drying: the coated copper pipe 4 moves to the heating cavity of the heating device 6 for heating and drying, the drying temperature is 200 DEG C, the drying time is 20 min, after drying, the coated copper pipe 4 returns to the original position, and is taken out after cooling, the thickness of the slurry layer is 0.25 mm.

[0058] In step S1, the binder is polyvinyl alcohol with a concentration of 10%, the mass ratio of copper powder to the binder is 1:1, the mass ratio of copper powder to the organic foaming agent is 1:0.01, the organic foaming agent is one of sulfonamide foaming agent, azo foaming agent or nitroso foaming agent, the mass of the copper powder is 100 g, the particle size of the copper powder is 131 μm, the stirring speed is 800 r / min, and the ultrasonic frequency is 40 kHz.

[0059] In step S2, the rotating speed of the coated copper pipe 4 is 0.5 r / min, and the dispensing speed is 10000 mm / min. Example 4

[0060] A slurry coating method for the inner wall of a copper pipe is performed on the coating device in example 1, and includes the following steps:

[0061] Step S1, slurry preparation: the copper powder, the binder and the organic foaming agent are mixed according to a certain mass ratio, and the required slurry is obtained by ultrasonic-assisted stirring, and the slurry is injected into the barrel 1;

[0062] Step S2, rotary coating: the related parameters of the parameter control module are set, the side dispensing needle 3 moves to the right at a certain speed, after entering the coated copper pipe 4, the slurry stored in the barrel 1 is quantitatively filled into the coated copper pipe 4 through the side dispensing needle 3, the coated copper pipe 4 rotates under the drive of the driving rotary roller 13, after the slurry is uniformly coated on the inner wall of the copper pipe, the side dispensing needle 3 returns to the original position;

[0063] Step S3, drying: in the process of rotary coating slurry, the coated copper pipe 4 moves to the heating cavity of the heating device 6 for heating and drying, the drying temperature is 220 DEG C, the drying time is 30 min, after drying, the coated copper pipe 4 returns to the original position, and is taken out after cooling, the thickness of the slurry layer is 0.15 mm.

[0064] In step S1, the binder is polyvinyl alcohol with a concentration of 8%, the mass ratio of copper powder to the binder is 1:0.5, the mass ratio of copper powder to the organic foaming agent is 1:0.03, the organic foaming agent is one of sulfonamide foaming agent, azo foaming agent or nitroso foaming agent, the mass of the copper powder is 100 g, the particle size of the copper powder is 114 μm, the stirring speed is 400 r / min, and the ultrasonic frequency is 40 kHz.

[0065] In step S2, the rotating speed of the coated copper pipe 4 is 1 r / min, and the dispensing speed is 15000 mm / min.

[0066] Finally, it should be noted that the above detailed description is merely intended to illustrate the technical solutions of the present application and not to limit the present application. Although the present application is described in detail with reference to the examples, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently, such as the coating device of the present application can not only realize the slurry coating of the inner wall of the copper pipe, but also realize the coating of the inner wall of the pipe of other types and different materials, as long as it does not deviate from the spirit and scope of the technical solutions of the present application, it should be covered in the scope of the claims of the present application.

Claims

1. A slurry coating apparatus for the inner wall of a copper tube, characterized by, The parameter control module is electrically connected with a side glue dispensing module, a rotary coating module and a heating and drying module. The side glue dispensing module comprises a side glue dispensing needle head (3) having one end connected with a barrel (1) and the other end closed and provided with a discharge port on a side wall, and the side glue dispensing needle head (3) is capable of moving left and right relative to the rotary coating module; the side glue dispensing needle head (3) is used for quantitatively filling slurry stored in the barrel (1) into a copper pipe (4) to be coated, and the copper pipe (4) to be coated has a diameter of ≤10 mm and a length of ≥200 mm. The side glue dispensing module further comprises a flow meter (2) for monitoring the amount of slurry entering the side glue dispensing needle head (3) and a first guide rail (5), and the side glue dispensing needle head (3) is capable of moving left and right relative to the copper pipe (4) to be coated on the first guide rail (5). The rotary coating module is capable of moving forward and backward relative to the heating and drying module, and the rotary coating module comprises a platform (8) provided with support plates (9) at both ends, and the support plates (9) are provided with support rods (10) and rotary rollers, and the copper pipe (4) to be coated is rotated under the drive of the rotary rollers. The heating and drying module comprises a heating device (6) for heating the copper pipe (4) to be coated and a clamping device (7) for clamping the copper pipe (4) to be coated. The slurry comprises copper powder, a binder and an organic foaming agent, the mass ratio of copper powder to the binder is 1:0.4-1:2, the mass ratio of copper powder to the organic foaming agent is 1:0.005-1:0.03, and the particle size of the copper powder is 25-180 μm. The rotary coating module further comprises a second guide rail (12) and a motor (11) capable of driving the rotary rollers to rotate, and the motor (11) is electrically connected with the parameter control module; the rotary rollers comprise a pair of driving rotary rollers (13), a large rotary roller (14) and a small rotary roller (15), the driving rotary rollers (13), the large rotary roller (14) and the small rotary roller (15) are tangentially arranged, and the copper pipe (4) to be coated is placed in a triangular space enclosed by the driving rotary rollers (13), the large rotary roller (14) and the small rotary roller (15). The motor (11) drives the driving rotary rollers (13) to rotate, the driving rotary rollers (13) drive the copper pipe (4) to be coated to rotate, and the copper pipe (4) to be coated drives the large rotary roller (14) and the small rotary roller (15) to rotate.

2. The copper tube inner wall paste coating apparatus according to claim 1, characterized by The rotary coating module is arranged at the right end of the side glue dispensing module.

3. The copper tube inner wall paste coating apparatus according to claim 1, characterized by The heating device (6) has a heating cavity capable of accommodating and heating the copper pipe (4) to be coated.

4. The copper tube inner wall paste coating apparatus according to claim 1, characterized by The clamping device (7) comprises a clamping pipe (71) with an inner diameter equal to or slightly larger than the outer diameter of the copper pipe to be coated (4), one end of the copper pipe to be coated (4) is clamped in the clamping pipe (71), and the clamping pipe (71) can rotate with the copper pipe to be coated (4).

5. The copper tube inner wall paste coating apparatus according to claim 1, characterized by The side glue injection needle (3) and the copper pipe to be coated (4) are driven by the air cylinder to move on the first guide rail (5) and the second guide rail (12) respectively, and the air cylinder is electrically connected with the parameter control module.

6. A method of applying an inner wall paste to a copper tube, characterized by, The coating device according to any one of claims 1-5 is used to perform the following steps: Step S1, pulp preparation: mix copper powder, binder and organic foaming agent according to a certain mass ratio, and inject the obtained slurry into the barrel (1) through ultrasonic assisted stirring; Step S2, spin coating: set the related parameters of the parameter control module, the side glue injection needle (3) moves to the right at a certain speed, the slurry stored in the barrel (1) is quantitatively filled into the copper pipe to be coated (4) through the side glue injection needle (3), the copper pipe to be coated (4) rotates under the driving of the driving roller (13), after the slurry is uniformly coated on the inner wall of the copper pipe, the side glue injection needle (3) returns to the original position; Step S3, drying: the copper pipe to be coated (4) moves to the heating cavity of the heating device (6) for heating and drying, the drying temperature is 80-250℃, the drying time is 1-30min, after drying, the coated copper pipe returns to the original position, and is taken out after cooling.

7. The copper pipe inner wall paste coating method according to claim 6, characterized by, The binder in step S1 is polyvinyl alcohol with a concentration of 5%-15%, and the stirring speed is 300-1000r / min.

8. The copper pipe inner wall paste coating method according to claim 6, characterized by, In step S2, the rotating speed of the copper pipe to be coated (4) is 0.1-5r / min, and the glue injection speed is 6000-15000mm / min.

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