A heating type paint conveying device

Abstract

A heating type paint conveying device comprises a paint recovery heating cylinder, an upper end cover and a lower end cover, a plurality of heating tubes are arranged in the paint recovery heating cylinder, a first heat transfer oil outlet and a first heat transfer oil inlet are arranged on the side wall of the paint recovery heating cylinder, a paint discharge pipe is integrally formed at the bottom center of the lower end cover, a paint inlet pipe is integrally formed on the side wall of the paint discharge pipe, a paint recovery pipe is integrally formed near the upper port on the side wall of the paint recovery heating cylinder, the paint outlet of the paint discharge pipe is connected to the paint inlet of the marking device, the paint inlet of the paint inlet pipe is connected to the paint outlet of the hot melt kettle, and the paint outlet of the paint recovery pipe is connected to the paint reflux inlet of the hot melt kettle. The present invention can not only heat the hot melt paint in the hot melt kettle of the marking operation, but also reflux the excess hot melt paint into the hot melt kettle, avoid the cold material phenomenon, prevent the conveying pipeline from being blocked, and improve the marking speed and marking quality.

Description

Technical Field

[0001] The invention relates to the technical field of road marking, in particular to a heating type paint conveying device. Background Art

[0002] At present, hot melt marking has unique advantages in this technical field, and the marking life is long. However, the melting efficiency of the hot melt kettle and the insulation of the hot melt conveying pipeline have always been a problem in the industry. The insulation of hot melt coating is a crucial link in the operation process. At present, during the construction process of hot melt coating, due to the low melting efficiency of the hot melt kettle and the lack of insulation or improper insulation of the conveying pipeline, there is often a cold material phenomenon, which causes the conveying pipeline to be blocked and the marking quality to be poor. In order to achieve smooth hot melt marking, it is necessary to ensure that sufficient hot melt coating can be provided in a marking state, and the temperature of the hot melt coating must be guaranteed to be within the marking temperature range. Summary of the invention

[0003] The purpose of the present invention is to provide a heated paint conveying device, which can not only heat the hot-melt paint in the hot-melt kettle for marking operations, but also return the excess hot-melt paint to the hot-melt kettle, thereby avoiding the occurrence of cold material, preventing the conveying pipeline from being blocked, and improving the marking speed and marking quality.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] A heating paint conveying device comprises a paint recovery heating cylinder, an upper end cover and a lower end cover. The paint recovery heating cylinder is transparent from top to bottom and is arranged vertically. The upper end cover is pressed and fixed to the upper port of the paint recovery heating cylinder by a fastening piece, and the lower end cover is fixedly installed on the lower port of the paint recovery heating cylinder. The inner circle of the upper side portion and the inner circle of the lower port of the paint recovery heating cylinder are fixedly provided with tube sheets. The inner cavity of the paint recovery heating cylinder between the two tube sheets is a first heating cavity. A plurality of heating tubes are coaxially arranged in the paint recovery heating cylinder. The upper end of each heating tube is respectively fixedly installed in each tube hole on the upper tube sheet, and the lower end of each heating tube is respectively fixedly installed in each tube hole on the lower tube sheet. The upper side portion of the side wall of the paint recovery heating cylinder is provided with A first heat transfer oil outlet is connected to the first heating chamber, and a first heat transfer oil inlet is arranged on the lower side of the side wall of the paint recovery heating cylinder and is connected to the first heating chamber. A paint discharge pipe which is vertically arranged and connected to the inside of the lower end cover is integrally formed at the bottom center of the lower end cover, and a horizontally arranged paint inlet pipe is integrally formed on the side wall of the paint discharge pipe. A paint recovery pipe which is horizontally arranged and connected to the top of the paint recovery heating cylinder is integrally formed on the side wall of the paint recovery heating cylinder near the upper port, and the inner end of the paint recovery pipe is located above the upper tube plate, the paint outlet of the paint discharge pipe is connected to the paint inlet of the marking device, the paint inlet of the paint inlet pipe is connected to the paint outlet of the hot melt kettle, and the paint outlet of the paint recovery pipe is connected to the paint reflux inlet of the hot melt kettle.

[0006] The fastening fixture includes a U-shaped lock, a V-shaped guide rod, a pressing screw and a limiting screw. The left side, right side and bottom side of the U-shaped lock are all open. The upper end outer circle of the paint recovery heating cylinder is integrally formed with an annular end plate. The outer diameter of the annular end plate is larger than the outer diameter of the upper end cover. An ear seat is fixedly arranged on the right edge of the annular end plate. The lower side of the U-shaped lock is hinged on the ear seat through a pin shaft arranged along the front-to-back direction. The upper end cover is coaxially arranged above the upper port of the paint recovery heating cylinder and is crimped with the annular end plate. A sealing gasket is provided on the upper surface of the annular end plate, which is tightly pressed between the upper end cover and the annular end plate. The V-shaped guide rod is arranged directly above the upper end cover in the left-right direction. The length of the V-shaped guide rod is the same as the outer diameter of the upper end cover. The middle bending part of the V-shaped guide rod protrudes upward and the middle of the V-shaped guide rod is The included angle is an obtuse angle. A threaded hole that is transparent from top to bottom is provided in the middle of the V-shaped guide rod. The U-shaped locking buckle is sleeved on the right end of the V-shaped guide rod. The top pressing screw is vertically threaded and connected in the threaded hole. The lower end of the top pressing screw is rotatably connected to the top center of the upper end cover. A rotating handle is fixedly provided on the upper end of the top pressing screw. A light hole that is transparent from top to bottom is provided at the left end of the V-shaped guide rod. The limiting screw vertically penetrates the light hole and passes through the left side of the upper end cover and the left side of the annular end plate. A fastening nut is threadedly connected to the lower end of the limiting screw. An elastic gasket that is tightly pressed between the fastening nut and the annular end plate is mounted on the lower side of the limiting screw. A steel sleeve that is located between the left end of the V-shaped guide rod and the upper end cover is mounted on the upper end of the limiting screw. A pressure head that is pressed on the upper surface of the left end of the V-shaped guide rod is provided at the upper end of the limiting screw.

[0007] The paint discharge pipe and the paint inlet pipe are fixedly sleeved with an integrally formed first heating tube shell on the outside, the cavity between the first heating tube shell and the paint discharge pipe and the paint inlet pipe is the second heating chamber and is connected, a second heat transfer oil inlet is fixedly provided on the first heating tube shell outside the paint inlet pipe, a second heat transfer oil outlet is fixedly provided on the first heating tube shell outside the paint discharge pipe, and both the second heat transfer oil inlet and the second heat transfer oil outlet are connected to the second heating chamber. The paint recovery pipe is fixedly sleeved with a second heating tube shell on the outside, a third heat transfer oil inlet is fixedly provided on the lower right part of the second heating tube shell, a third heat transfer oil outlet is fixedly provided on the upper left part of the second heating tube shell, the cavity between the second heating tube shell and the paint recovery pipe is the third heating chamber, and both the third heat transfer oil inlet and the third heat transfer oil outlet are connected to the third heating chamber, a gas inlet connected to the inside of the paint recovery pipe is fixedly provided on the upper right part of the paint recovery pipe, and the outer end of the gas inlet extends outward from the second heating tube shell.

[0008] The lower end cover is a conical structure with a larger upper portion and a smaller lower portion. The upper outer edge of the lower end cover and the lower outer edge of the paint recovery heating cylinder are integrally formed with a flange ring plate. The upper and lower flange ring plates are butted up and down and fixedly connected by a number of flange bolts.

[0009] A number of semicircular baffles located in the first heating chamber and arranged horizontally are fixedly connected to the inner wall of the paint recovery heating cylinder. The semicircular baffles are arranged at intervals up and down, and two adjacent semicircular baffles are staggered left and right. The heating tubes on the right side respectively penetrate and are fixedly connected to the semicircular baffles on the right side, and the heating tubes on the left side respectively penetrate and are fixedly connected to the semicircular baffles on the left side.

[0010] Compared with the prior art, the present invention has outstanding substantial features and significant progress. Specifically, the working principle of the present invention is as follows: before starting work, the handle is rotated to rotate the pressing screw. Since the pressing screw is threadedly connected to the threaded hole in the middle of the V-shaped guide rod, the V-shaped guide rod moves upward. When the upper surface of the left end of the V-shaped guide rod is pressed and contacted with the upper end pressure head of the limiting screw, and the U-shaped lock is sleeved on the right end of the V-shaped guide rod and is pressed and contacted with the upper surface of the right end of the V-shaped guide rod, the pressing screw is continued to be rotated, and the pressing screw is rotated and moved downward, and the lower end of the pressing screw presses downward and presses the upper end cover, so that the upper end cover is pressed and contacted with the paint recovery heating cylinder. The annular end plate at the upper end is tightly pressed and fixed with a sealing connection. The hot-melt paint in the hot-melt kettle is output from the paint outlet of the hot-melt kettle through the feed pump at a certain pressure and enters the paint inlet of the paint inlet pipe. The hot-melt paint flows into the paint discharge pipe. The hot-melt paint flows downward from the paint outlet of the paint discharge pipe under the action of gravity and flows into the marking device. The marking device performs marking operations and controls the flow rate of the hot-melt paint. When the flow rate of the supplied hot-melt paint is greater than the flow rate of the hot-melt paint required by the marking device, the excess hot-melt paint will flow upward in the paint discharge pipe to the lower end cover and continue to flow upward through each heating tube. The excess hot-melt paint After flowing upward through each heating tube, it flows out from the paint outlet of the paint recovery tube, and the excess hot-melt paint flows back into the hot-melt kettle through the paint recovery tube for recovery. At the same time, the high-temperature heat-conducting oil flows into the first heating chamber from the first heat-conducting oil inlet, the high-temperature heat-conducting oil flows into the second heating chamber from the second heat-conducting oil inlet, and the high-temperature heat-conducting oil flows into the third heating chamber from the third heat-conducting oil inlet. The high-temperature heat-conducting oil flowing in the first heating chamber realizes heat exchange with the hot-melt paint flowing in each heating tube, the high-temperature heat-conducting oil flowing in the second heating chamber realizes heat exchange with the hot-melt paint flowing in the paint discharge pipe and the paint inlet pipe, and the high-temperature heat-conducting oil flowing in the third heating chamber realizes heat exchange with the hot-melt paint flowing in the paint discharge pipe and the paint inlet pipe. The high-temperature heat transfer oil realizes heat exchange with the hot-melt paint flowing in the paint recovery pipe, heats and insulates the hot-melt paint, and ensures that the hot-melt paint is always in a high-temperature state, and the high-temperature heat transfer oil flows out from the first heat transfer oil outlet, the second heat transfer oil outlet and the third heat transfer oil outlet respectively. When the marking operation is completed, the supply of hot-melt paint and high-temperature heat transfer oil is stopped, and the paint recovery pipe, the paint discharge pipe and the paint inlet pipe are disassembled from other pipelines, the right port of the paint recovery pipe is blocked, and high-pressure air is filled in through the gas inlet. The high-pressure air blows out the residual hot-melt paint in the paint recovery pipe, each heating pipe, the paint discharge pipe and the paint inlet pipe.

[0011] The invention can heat the hot melt paint in the hot melt kettle for marking operation and return the excess hot melt paint to the hot melt kettle, thereby avoiding the cold material phenomenon, preventing the transportation pipeline from being blocked, and improving the marking speed and marking quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view of the present invention.

[0013] Figure 2 It is a cross-sectional view of the present invention.

[0014] Figure 3 It is a right side view of the present invention.

[0015] Figure 4 yes Figure 1 AA section view.

[0016] Figure 5 yes Figure 1 Middle BB section view.

[0017] Figure 6 yes Figure 1 CC section view.

[0018] Figure 7 yes Figure 2 A partial enlarged view of point D in the middle.

[0019] Figure 8 yes Figure 2 A partial enlarged view of point E in the middle.

[0020] Fig. 9 yes Figure 1 A partial enlarged view of point F in the middle. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are further described below with reference to the accompanying drawings.

[0022] like Figure 1-Figure 9As shown, a heating type paint conveying device comprises a paint recovery heating cylinder 1, an upper end cover 2 and a lower end cover 3. The paint recovery heating cylinder 1 is transparent from top to bottom and is vertically arranged. The upper end cover 2 is pressed and fixed to the upper port of the paint recovery heating cylinder 1 by a fastening piece, and the lower end cover 3 is fixedly installed on the lower port of the paint recovery heating cylinder 1. The inner circle of the upper side portion and the inner circle of the lower port of the paint recovery heating cylinder 1 are fixedly provided with tube sheets 4. The inner cavity of the paint recovery heating cylinder 1 between the two tube sheets 4 is a first heating cavity. A plurality of heating tubes 5 are coaxially arranged in the paint recovery heating cylinder 1. The upper ends of the heating tubes 5 are respectively fixedly installed in the respective tube holes on the upper tube sheet 4, and the lower ends of the heating tubes 5 are respectively fixedly installed in the respective tube holes on the lower tube sheet 4. The upper side portion of the side wall of the paint recovery heating cylinder 1 is provided with A first heat transfer oil outlet 6 is connected to the first heating chamber, and a first heat transfer oil inlet 7 is provided on the lower side of the side wall of the paint recovery heating cylinder 1, which is connected to the first heating chamber. A paint discharge pipe 8 is vertically arranged and connected to the interior of the lower end cover 3, and a paint inlet pipe 9 is horizontally arranged and integrated on the side wall of the paint discharge pipe 8. A paint recovery pipe 10 is horizontally arranged and connected to the top of the paint recovery heating cylinder 1 and is integrally formed on the side wall of the paint recovery heating cylinder 1 near the upper port. The inner end of the paint recovery pipe 10 is located above the upper tube plate 4, the paint outlet of the paint discharge pipe 8 is connected to the paint inlet of the marking device, the paint inlet of the paint inlet pipe 9 is connected to the paint outlet of the hot melt kettle, and the paint outlet of the paint recovery pipe 10 is connected to the paint reflux inlet of the hot melt kettle.

[0023] The tightening fixture includes a U-shaped lock buckle 11, a V-shaped guide rod 12, a top pressing screw 13 and a limit screw 14. The left side, right side and lower side of the U-shaped lock buckle 11 are all open. The upper end outer circle of the paint recovery heating cylinder 1 is integrally formed with an annular end plate 15. The outer diameter of the annular end plate 15 is larger than the outer diameter of the upper end cover 2. An ear seat 16 is fixedly arranged on the right edge of the annular end plate 15. The lower side of the U-shaped lock buckle 11 is hinged on the ear seat 16 through a pin shaft 17 arranged along the front and rear directions. The upper end cover 2 is coaxially arranged above the upper port of the paint recovery heating cylinder 1 and is pressed with the annular end plate 15. A sealing gasket 18 is provided on the upper surface of the annular end plate 15, which is tightly pressed between the upper end cover 2 and the annular end plate 15. The V-shaped guide rod 12 is arranged directly above the upper end cover 2 in the left and right direction. The length of the V-shaped guide rod 12 is the same as the outer diameter of the upper end cover 2. The middle bending part of the V-shaped guide rod 12 protrudes upward and the middle of the V-shaped guide rod 12 The angle between the upper and lower ends of the V-shaped guide rod 12 is an obtuse angle. A threaded hole that is transparent from top to bottom is opened in the middle of the V-shaped guide rod 12. The U-shaped lock buckle 11 is sleeved on the right end of the V-shaped guide rod 12. The top pressure screw 13 is vertically threaded and connected in the threaded hole. The lower end of the top pressure screw 13 is rotatably connected to the top center of the upper end cover 2. A rotating handle 19 is fixedly provided on the upper end of the top pressure screw 13. A light hole that is transparent from top to bottom is opened at the left end of the V-shaped guide rod 12. The limit screw 14 vertically penetrates the light hole and passes through the upper end cover 2. The left side of the end cover 2 and the left side of the annular end plate 15, the lower end of the limiting screw 14 is threadedly connected with a fastening nut 20, the lower side of the limiting screw 14 is sleeved with an elastic gasket tightly pressed between the fastening nut 20 and the annular end plate 15, the upper side of the limiting screw 14 is sleeved with a steel sleeve 21 located between the left end of the V-shaped guide rod 12 and the upper end cover 2, and the upper end of the limiting screw 14 is provided with a pressure head 22 pressed on the upper surface of the left end of the V-shaped guide rod 12. The steel sleeve 21 serves to limit the distance between 12 and 2 on 14, which is convenient for operation.

[0024] The outside of the paint discharge pipe 8 and the paint inlet pipe 9 is fixedly covered with an integrally formed first heating tube shell 23, the cavity between the first heating tube shell 23 and the paint discharge pipe 8 and the paint inlet pipe 9 is a second heating chamber and is connected, a second heat transfer oil inlet 24 is fixedly provided on the first heating tube shell 23 outside the paint inlet pipe 9, and a second heat transfer oil outlet 25 is fixedly provided on the first heating tube shell 23 outside the paint discharge pipe 8, and both the second heat transfer oil inlet 24 and the second heat transfer oil outlet 25 are connected to the second heating chamber.

[0025] A second heating tube shell 26 is fixedly mounted on the outside of the paint recovery tube 10, a third heat transfer oil inlet 27 is fixedly arranged on the lower right part of the second heating tube shell 26, a third heat transfer oil outlet 28 is fixedly arranged on the upper left part of the second heating tube shell 26, the cavity between the second heating tube shell 26 and the paint recovery tube 10 is the third heating cavity, the third heat transfer oil inlet 27 and the third heat transfer oil outlet 28 are both connected to the third heating cavity, a gas inlet 29 connected to the inside of the paint recovery tube 10 is fixedly arranged on the upper right part of the paint recovery tube 10, and the outer end of the gas inlet 29 extends outward from the second heating tube shell 26.

[0026] The lower end cover 3 is a conical structure with a larger upper portion and a smaller lower portion. The upper outer edge of the lower end cover 3 and the lower outer edge of the paint recovery heating cylinder 1 are integrally formed with a flange ring plate 30. The upper and lower flange ring plates 30 are butted up and down and fixedly connected by a plurality of flange bolts 31.

[0027] A plurality of semicircular baffles 32 located in the first heating chamber and arranged horizontally are fixedly connected to the inner wall of the paint recovery heating cylinder 1. The semicircular baffles 32 are arranged at intervals up and down, and two adjacent semicircular baffles 32 are staggered left and right. The heating tubes 5 on the right side are respectively passed through and fixedly connected to the semicircular baffles 32 on the right side, and the heating tubes 5 on the left side are respectively passed through and fixedly connected to the semicircular baffles 32 on the left side.

[0028] The working principle of the present invention is as follows: before starting work, the handle 19 is rotated to rotate the pressing screw 13. Since the pressing screw 13 is threadedly connected to the threaded hole in the middle of the V-shaped guide rod 12, the V-shaped guide rod 12 moves upward. When the upper surface of the left end of the V-shaped guide rod 12 is pressed and contacted with the upper end pressure head 22 of the limiting screw 14, and the U-shaped lock buckle 11 is sleeved on the right end of the V-shaped guide rod 12 and is pressed and contacted with the upper surface of the right end of the V-shaped guide rod 12, the pressing screw 13 is continued to be rotated, and the pressing screw 13 is rotated and moved downward, and the lower end of the pressing screw 13 presses downward and presses the upper end cover 2, so that the upper end cover 2 is tightly connected to the annular end plate 15 at the upper end of the paint recovery heating cylinder 1. The hot-melt paint in the hot-melt kettle is output from the paint outlet of the hot-melt kettle through the feed pump at a certain pressure and enters the paint inlet of the paint inlet pipe 9, and the hot-melt paint flows into the paint discharge pipe 8. The hot-melt paint flows downward from the paint outlet of the paint discharge pipe 8 under the action of gravity and flows into the marking device. The marking device performs marking operations and controls the flow rate of the hot-melt paint. When the flow rate of the supplied hot-melt paint is greater than the flow rate of the hot-melt paint required by the marking device, the excess hot-melt paint will flow upward in the paint discharge pipe 8 to the lower end cover 3 and continue to flow upward through each heating tube 5. The excess hot-melt paint flows upward through each heating tube 5 and then flows out from The paint outlet of the paint recovery pipe 10 flows out, and the excess hot-melt paint flows back into the hot-melt kettle through the paint recovery pipe 10 to be recycled. At the same time, the high-temperature heat-conducting oil flows into the first heating chamber from the first heat-conducting oil inlet 7, the high-temperature heat-conducting oil flows into the second heating chamber from the second heat-conducting oil inlet 24, and the high-temperature heat-conducting oil flows into the third heating chamber from the third heat-conducting oil inlet 27. The high-temperature heat-conducting oil flowing in the first heating chamber realizes heat exchange with the hot-melt paint flowing in each heating pipe 5, the high-temperature heat-conducting oil flowing in the second heating chamber realizes heat exchange with the hot-melt paint flowing in the paint discharge pipe 8 and the paint inlet pipe 9, and the high-temperature heat-conducting oil flowing in the third heating chamber realizes heat exchange with the hot-melt paint flowing in the paint discharge pipe 8 and the paint inlet pipe 9. The hot-melt paint in the paint recovery pipe 10 realizes heat exchange, heats and insulates the hot-melt paint, and ensures that the hot-melt paint is always in a high-temperature state, and the high-temperature heat transfer oil flows out from the first heat transfer oil outlet 6, the second heat transfer oil outlet 25 and the third heat transfer oil outlet 28 respectively. When the marking operation is completed, the supply of hot-melt paint and high-temperature heat transfer oil is stopped, and the paint recovery pipe 10, the paint discharge pipe 8 and the paint inlet pipe 9 are disassembled from other pipelines, the right port of the paint recovery pipe 10 is blocked, and high-pressure air is filled in through the gas inlet 29. The high-pressure air blows out the residual hot-melt paint in the paint recovery pipe 10, each heating pipe 5, the paint discharge pipe 8 and the paint inlet pipe 9.

[0029] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A heating paint delivery device, characterized in that: The paint recovery heating cylinder comprises a paint recovery heating cylinder, an upper end cover and a lower end cover. The paint recovery heating cylinder is transparent from top to bottom and is vertically arranged. The upper end cover is pressed and fixed to the upper port of the paint recovery heating cylinder by a fastening piece, and the lower end cover is fixedly installed on the lower port of the paint recovery heating cylinder. The inner circle of the upper side portion and the inner circle of the lower port of the paint recovery heating cylinder are fixedly provided with tube sheets. The inner cavity of the paint recovery heating cylinder between the two tube sheets is the first heating cavity. A plurality of heating tubes are coaxially arranged in the paint recovery heating cylinder. The upper end of each heating tube is respectively fixedly installed in each tube hole on the upper tube sheet, and the lower end of each heating tube is respectively fixedly installed in each tube hole on the lower tube sheet. The upper side portion of the side wall of the paint recovery heating cylinder is provided with tubes corresponding to the first heating cavity. A first heat transfer oil outlet connected to the paint recovery heating cylinder is provided at the lower side of the side wall of the paint recovery heating cylinder with a first heat transfer oil inlet connected to the first heating chamber, a paint discharge pipe vertically arranged and connected to the inside of the lower end cover is integrally formed at the bottom center of the lower end cover, a paint inlet pipe horizontally arranged is integrally formed on the side wall of the paint discharge pipe, a paint recovery pipe horizontally arranged and connected to the top of the paint recovery heating cylinder is integrally formed near the upper port on the side wall of the paint recovery heating cylinder, the inner end of the paint recovery pipe is located above the upper tube plate, the paint outlet of the paint discharge pipe is connected to the paint inlet of the marking device, the paint inlet of the paint inlet pipe is connected to the paint outlet of the hot melt kettle, and the paint outlet of the paint recovery pipe is connected to the paint reflux inlet of the hot melt kettle; A number of semicircular baffles located in the first heating chamber and arranged horizontally are fixedly connected to the inner wall of the paint recovery heating cylinder. The semicircular baffles are arranged at intervals up and down, and two adjacent semicircular baffles are staggered left and right. The heating tubes on the right side respectively penetrate and are fixedly connected to the semicircular baffles on the right side, and the heating tubes on the left side respectively penetrate and are fixedly connected to the semicircular baffles on the left side.

2. The heated paint delivery device according to claim 1, characterized in that: The fastening fixture includes a U-shaped lock, a V-shaped guide rod, a pressing screw and a limiting screw. The left side, right side and bottom side of the U-shaped lock are all open. The upper end outer circle of the paint recovery heating cylinder is integrally formed with an annular end plate. The outer diameter of the annular end plate is larger than the outer diameter of the upper end cover. An ear seat is fixedly arranged on the right edge of the annular end plate. The lower side of the U-shaped lock is hinged on the ear seat through a pin shaft arranged along the front-to-back direction. The upper end cover is coaxially arranged above the upper port of the paint recovery heating cylinder and is crimped with the annular end plate. A sealing gasket is provided on the upper surface of the annular end plate, which is tightly pressed between the upper end cover and the annular end plate. The V-shaped guide rod is arranged directly above the upper end cover in the left-right direction. The length of the V-shaped guide rod is the same as the outer diameter of the upper end cover. The middle bending part of the V-shaped guide rod protrudes upward and the middle of the V-shaped guide rod is The included angle is an obtuse angle. A threaded hole that is transparent from top to bottom is provided in the middle of the V-shaped guide rod. The U-shaped locking buckle is sleeved on the right end of the V-shaped guide rod. The top pressing screw is vertically threaded and connected in the threaded hole. The lower end of the top pressing screw is rotatably connected to the top center of the upper end cover. A rotating handle is fixedly provided on the upper end of the top pressing screw. A light hole that is transparent from top to bottom is provided at the left end of the V-shaped guide rod. The limiting screw vertically penetrates the light hole and passes through the left side of the upper end cover and the left side of the annular end plate. A fastening nut is threadedly connected to the lower end of the limiting screw. An elastic gasket that is tightly pressed between the fastening nut and the annular end plate is mounted on the lower side of the limiting screw. A steel sleeve that is located between the left end of the V-shaped guide rod and the upper end cover is mounted on the upper end of the limiting screw. A pressure head that is pressed on the upper surface of the left end of the V-shaped guide rod is provided at the upper end of the limiting screw.

3. The heated paint delivery device according to claim 2, characterized in that: The paint discharge pipe and the paint inlet pipe are fixedly sleeved with an integrally formed first heating tube shell on the outside, the cavity between the first heating tube shell and the paint discharge pipe and the paint inlet pipe is a second heating chamber and is connected, a second heat transfer oil inlet is fixedly provided on the first heating tube shell outside the paint inlet pipe, and a second heat transfer oil outlet is fixedly provided on the first heating tube shell outside the paint discharge pipe, and both the second heat transfer oil inlet and the second heat transfer oil outlet are connected to the second heating chamber.

4. The heated paint delivery device according to claim 3, characterized in that: A second heating tube shell is fixedly mounted on the outside of the paint recovery tube, a third heat transfer oil inlet is fixedly arranged on the lower right part of the second heating tube shell, a third heat transfer oil outlet is fixedly arranged on the upper left part of the second heating tube shell, the cavity between the second heating tube shell and the paint recovery tube is the third heating cavity, the third heat transfer oil inlet and the third heat transfer oil outlet are both connected to the third heating cavity, a gas inlet connected to the inside of the paint recovery tube is fixedly arranged on the upper right part of the paint recovery tube, and the outer end of the gas inlet extends outward from the second heating tube shell.

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