Uninterrupted efficient powder supplying and spraying system

Abstract

According to the uninterrupted efficient powder supplying and spraying system, powder supplying interruption cannot be caused when the powder bag is replaced, and new powder and old powder can enter the mixed powder barrel only after being mixed and filtered. The weighing sensor is mounted on the fixed frame; the electric hoist is mounted on the weighing sensor; the balance bracket is mounted on the electric hoist; the powder bag is mounted on the balance bracket; an inlet of the discharge valve is connected with an outlet of the powder bag; an outlet of the discharge valve is connected with a vibrator, and the vibrator is connected with a fluidized powder barrel; the fluidized powder barrel is provided with a new powder conveying pump; an inlet of the new powder pipeline is connected with the new powder conveying pump, and an outlet is connected with an inlet of the powder mixer; an inlet of the old powder pipeline is connected with the cyclone separator, and an outlet is connected with an inlet of the powder mixer; a mixed powder outlet of the powder mixer is connected with an inlet of the rotary screen; a small particle outlet of the rotary screen is connected with an inlet of the mixed powder barrel; a mixed powder conveying pump is installed on the mixed powder barrel and connected with the spray gun system.

Description

Technical Field

[0001] The utility model relates to an uninterrupted high-efficiency powder supply and spraying system, which is used for powder spraying equipment. Background Art

[0002] The powder spraying process relies on the principle of electrostatic adsorption to spray the powder coating onto the surface of the workpiece to form a uniform powder coating. The main problems of the existing powder supply and spraying system are as follows:

[0003] 1. When replacing the powder bag, the powder supply is forced to be interrupted, and the powder level in the powder barrel will change, resulting in fluctuations in the powder output of the end spray gun and affecting the spraying effect.

[0004] 2. The new powder and the old powder are mixed and directly enter the powder barrel without filtration, resulting in uncontrollable coating appearance. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the above deficiencies existing in the prior art, and to provide an uninterrupted high-efficiency powder supply and spraying system with reasonable structural design, which will not cause interruption of powder supply when replacing the powder bag, and the new powder and the old powder can enter the mixing powder barrel only after being filtered after mixing.

[0006] The uninterrupted high-efficiency powder supply and spraying system adopted by the utility model to solve the above problems includes a powder supply system and a spray gun system. The powder supply system includes a powder bag powder supply device and a mixing powder supply device; it is characterized in that: the powder bag powder supply device includes an electric hoist, a weighing sensor, a fixed frame, a balance bracket, a powder bag, a discharge valve, a fluidized powder barrel, a new powder transfer pump and a vibrator; the weighing sensor is installed on the fixed frame; the electric hoist is installed on the weighing sensor; the balance bracket is installed on the electric hoist; the powder bag is installed on the balance bracket; the inlet of the discharge valve is connected to the outlet of the powder bag; the outlet of the discharge valve is connected to the vibrator, and the vibrator is connected to the fluidized powder barrel; a new powder transfer pump is arranged on the fluidized powder barrel; the mixing powder supply device includes a mixing powder barrel, a mixing powder transfer pump, an old powder pipeline, a new powder pipeline, a powder mixer, a cyclone separator and a rotary screen; the inlet of the new powder pipeline is connected to the new powder transfer pump, and the outlet is connected to the inlet of the powder mixer; the inlet of the old powder pipeline is connected to the cyclone separator, and the outlet is connected to the inlet of the powder mixer; the mixed powder outlet of the powder mixer is connected to the inlet of the rotary screen; the small particle outlet of the rotary screen is connected to the inlet of the mixing powder barrel; a mixing powder transfer pump is installed on the mixing powder barrel, and the mixing powder transfer pump is connected to the spray gun system.

[0007] A connecting flange is arranged at the inlet of the discharge valve of the utility model, and the inlet of the discharge valve is connected to the outlet of the powder bag through the connecting flange.

[0008] The vibrator of the utility model is connected to the fluidized powder barrel through a flexible connection.

[0009] The powder bag powder supply device described in the present utility model further includes a mobile support, and the discharge valve, vibrator, and fluidized powder barrel are all installed on the mobile support.

[0010] An air amplifier is installed on the new powder pipeline of the present utility model.

[0011] The powder bag powder supply device described in the present utility model is at least two sets, and the new powder pipelines are at least two. One new powder pipeline is equipped with one set of powder bag powder supply device.

[0012] An old powder transfer pump and a first valve are installed on the old powder pipeline of the present utility model.

[0013] A powder level detector is provided at the lower part of the cyclone separator of the present utility model.

[0014] The mixing powder supply device described in the present utility model further includes a recycled powder barrel, and the recycled powder barrel is connected to the old powder pipeline through a second valve.

[0015] The mixing powder supply device described in the present utility model further includes an impurity collection barrel, and the large particle outlet of the rotary sieve is connected to the impurity collection barrel.

[0016] Compared with the prior art, the present utility model has the following advantages and effects:

[0017] 1. A weighing sensor is provided, which can detect the remaining powder amount of the powder bag at any time. If the powder amount in the powder bag of a set of powder bag powder supply device is insufficient, the new powder transfer pump of this set of powder bag powder supply device is closed, and at the same time, the new powder transfer pump of another powder bag powder supply device is opened. In this way, when replacing the powder bag, the powder supply will not be interrupted, and uninterrupted powder supply can be achieved.

[0018] 2. The powder supply efficiency is high.

[0019] 3. The new powder and old powder can only enter the mixing powder barrel after being filtered by the rotary sieve after mixing, and the coating appearance can be controlled. Description of the Drawings

[0020] Figure 1 is the front view structural schematic diagram of the powder bag powder supply device in the embodiment of the present utility model.

[0021] Figure 2 is the side view structural schematic diagram of the powder bag powder supply device in the embodiment of the present utility model.

[0022] Figure 3 is the three-dimensional structural schematic diagram of the powder bag powder supply device in the embodiment of the present utility model.

[0023] Figure 4 is the structural schematic diagram of the mixing powder supply device in the embodiment of the present utility model. Detailed Embodiment

[0024] The present utility model will be further described in detail below in conjunction with the accompanying drawings and through embodiments. The following embodiments are explanations of the present utility model, and the present utility model is not limited to the following embodiments.

[0025] An embodiment of the present utility model includes a powder supply system and a spray gun system 28. The powder supply system includes a powder bag supply device and a mixed powder supply device.

[0026] I. There are at least two sets of powder bag supply devices. In this embodiment, a total of four sets are provided, with two in use and two in reserve. Each set of powder bag supply devices includes an electric hoist 1, a weighing sensor 2, a fixed frame 3, a balance bracket 4, a powder bag 5, a discharge valve 7, a fluidized powder barrel 8, a new powder transfer pump 9, a connecting flange 10, a flexible connection 11, a moving bracket 12, and a vibrator 13.

[0027] The weighing sensor 2 is installed on the fixed frame 3; the electric hoist 1 is installed on the weighing sensor 2 through a hook at the bottom of the weighing sensor 2. The powder bag 5 can be lifted and lowered through the electric hoist 1, which is convenient for assembly. And by overall hoisting, the weight of the powder can be detected and then fed back to the control system. The balance bracket 4 is installed on the electric hoist 1. The powder bag 5 is installed on the balance bracket 4.

[0028] The inlet of the discharge valve 7 is provided with a connecting flange 10. The inlet of the discharge valve 7 is connected to the outlet of the powder bag 5 through the connecting flange 10. The outlet of the discharge valve 7 is connected to the vibrator 13. The vibrator 13 is connected to the fluidized powder barrel 8 through the flexible connection 11. The flexible connection 11 can compensate for the vibration deviation during equipment operation, ensuring stable powder supply by the new powder transfer pump 9. The powder is led into the fluidized powder barrel 8 through the vibration of the vibrator 13. A fluidizing plate 6 is provided at the bottom of the fluidized powder barrel 8, and a new powder transfer pump 9 is provided on the side wall. The powder in the powder bag 5 enters the fluidized powder barrel 8 through the discharge valve 7 and the vibrator 13, and the fluidized powder can be smoothly sent to the powder supply center.

[0029] The discharge valve 7, the vibrator 13, and the fluidized powder barrel 8 are all installed on the moving bracket 12. When the powder bag 5 needs to be replaced, the connecting flange 10 is disassembled, the discharge valve 7 is separated from the powder bag 5, the moving bracket 12 is moved, and the discharge valve 7, the vibrator 13, the fluidized powder barrel 8, etc. are moved away to facilitate replacement.

[0030] II. The mixed powder supply device includes a mixed powder barrel 14, a mixed powder transfer pump 15, a recycled powder barrel 16, an old powder pipeline 17, a new powder pipeline 18, a powder level detector 19, an air amplifier 21, a powder mixer 22, a cyclone separator 24, a rotary sieve 25, and an impurity collection barrel 27.

[0031] The inlet of the new powder pipeline 18 is connected to the new powder transfer pump 9, and the outlet is connected to the inlet of the powder mixer 22; an air amplifier 21 is installed on the new powder pipeline 18. There are at least two new powder pipelines 18, and one set of powder bag powder supply device is provided for each new powder pipeline 18. By opening and closing the new powder transfer pumps 9 of each set of powder bag powder supply devices, the powder supply and powder cut-off of the powder bag powder supply device are realized.

[0032] The powder from the powder bag 5 is new powder, which is transmitted through the new powder transfer pump 9 and the transmission kinetic energy is increased through the air amplifier 21. The inlet of the old powder pipeline 17 is connected to the cyclone separator 24, and the outlet is connected to the inlet of the powder mixer 22; an old powder transfer pump 26 and a first valve M1 are installed on the old powder pipeline 17. The powder collected at the bottom of the cyclone separator 24 is recycled old powder, with slightly worse powder quality and possibly large impurities in the middle. By controlling the running time of the new powder transfer pump 9 and the old powder transfer pump 26, the ratio of new and old powder entering the powder mixer 22 is controlled. A powder level detector 19 is provided at the lower part of the cyclone separator 24, which can detect the bottom powder level at any time.

[0033] The recycled powder bucket 16 is connected to the old powder pipeline 17 through a second valve M2. When the powder level is too high and the mixing of old powder is not allowed, the first valve M1 is closed and the second valve M2 is opened to discharge the excess old powder into the recycled powder bucket 16.

[0034] The mixed powder outlet of the powder mixer 22 is connected to the inlet of the rotary screen 25, and an ultra-fine powder outlet 23 is provided at the top of the powder mixer 22; the small particle outlet of the rotary screen 25 is connected to the inlet of the mixed powder bucket 14, and the large particle outlet is connected to the inlet of the impurity collection bucket 27. The new powder and the old powder are fully mixed in the powder mixer 22, and most of the mixed powder falls into the inlet of the rotary screen 25 by gravity and centrifugal force, and a small amount of ultra-fine powder is discharged through the ultra-fine powder outlet 23 at the top. Under the action of the rotary screen 25, the small particle powder moves to the middle of the screen mesh, is screened into the hopper at the small particle outlet, and then falls into the mixed powder bucket 14; the large particle impurities are rotated to the periphery of the rotary screen 25 by centrifugal force and fall into the impurity collection bucket 27 for regular cleaning.

[0035] A mixed powder transfer pump 15 is installed on the mixed powder bucket 14, and the mixed powder transfer pump 15 is connected to the spray gun system 28.

[0036] In this embodiment, the two powder supply systems can jointly meet the spraying of multiple spray guns of multiple spray gun systems 28, and the powder supply amount can reach 40 kg / min.

[0037] In addition, it should be noted that for the specific embodiments described in this specification, the shapes and names of the components can be different. The above content described in this specification is only an example of the structure of the present utility model. Any equivalent changes or simple changes made according to the structure, features, and principles conceived in the patent of the present utility model are included in the protection scope of the patent of the present utility model. Those skilled in the art of the present utility model can make various modifications, supplements, or use similar methods for substitution to the specific embodiments described, as long as they do not deviate from the structure of the present utility model or exceed the scope defined by this claim book, they should all belong to the protection scope of the present utility model.

Claims

1. Uninterrupted and efficient powder supply and spraying system, including a powder supply system and a spray gun system, the powder supply system includes a powder bag supply device and a mixed powder supply device; the characteristics are: The powder bag supply device includes an electric hoist, a weighing sensor, a fixed frame, a balancing bracket, a powder bag, a discharge valve, a fluidized powder barrel, a new powder delivery pump and a vibrator; the weighing sensor is installed on the fixed frame; the electric hoist is installed on the weighing sensor; the balancing bracket is installed on the electric hoist; the powder bag is installed on the balancing bracket; the inlet of the discharge valve is connected to the outlet of the powder bag; the outlet of the discharge valve is connected to the vibrator, and the vibrator is connected to the fluidized powder barrel; the fluidized powder barrel is provided with a new powder delivery pump; the mixed powder supply device includes a mixed powder barrel, a mixed powder delivery pump, an old powder pipeline, a new powder pipeline, a powder mixer, a cyclone separator and a rotary screen; the inlet of the new powder pipeline is connected to the new powder delivery pump, and the outlet is connected to the inlet of the powder mixer; the inlet of the old powder pipeline is connected to the cyclone separator, and the outlet is connected to the inlet of the powder mixer; the mixed powder outlet of the powder mixer is connected to the inlet of the rotary screen; the small particle outlet of the rotary screen is connected to the inlet of the mixed powder barrel; the mixed powder barrel is equipped with a mixed powder delivery pump, and the mixed powder delivery pump is connected to the spray gun system.

2. The uninterrupted and efficient powder supply and spraying system according to claim 1 is characterized in that: The inlet of the discharge valve is provided with a connecting flange, and the inlet of the discharge valve is connected to the outlet of the powder bag through the connecting flange.

3. The uninterrupted and efficient powder supply and spraying system according to claim 1 is characterized in that: The vibrator is connected to the fluidized powder barrel through a flexible connection.

4. The uninterrupted and efficient powder supply and spraying system according to claim 1 is characterized in that: The powder bag powder supply device also includes a movable bracket, and the discharge valve, the vibrator and the fluidized powder barrel are all installed on the movable bracket.

5. The uninterrupted and efficient powder supply and spraying system according to claim 1 is characterized in that: An air amplifier is installed on the new powder pipeline.

6. The uninterrupted and efficient powder supply and spraying system according to claim 1 is characterized in that: There are at least two sets of powder bag powder supply devices, at least two new powder pipelines, and one new powder pipeline is equipped with one set of powder bag powder supply devices.

7. The uninterrupted and efficient powder supply and spraying system according to claim 1 is characterized in that: A used powder delivery pump and a No. 1 valve are installed on the old powder pipeline.

8. The uninterrupted and efficient powder supply and spraying system according to claim 1 is characterized in that: A powder level detector is arranged at the lower part of the cyclone separator.

9. The uninterrupted and efficient powder supply and spraying system according to claim 7 is characterized in that: The mixed powder supply device also includes a powder recovery barrel, which is connected to the old powder pipeline via a No. 2 valve.

10. The uninterrupted and efficient powder supply and spraying system according to claim 7, characterized in that: The mixed powder supply device also includes an impurity collection barrel, and the large particle outlet of the rotary screen is connected to the impurity collection barrel.

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