Novel automatic powder spraying device

Abstract

The utility model provides a novel automatic powder spraying device. The novel automatic powder spraying device comprises a shell, an ash hopper bin, a spiral conveying device, a discharging pipe, an ash conveying pipe, an air source assembly and a control system. A discharge hole is formed in the lower end of the ash hopper bin; the spiral conveying device comprises a driving device, a conveying groove body and a spiral blade, a powder discharging opening is formed in the upper portion of the conveying groove body, and an outlet is formed in the lower portion of the conveying groove body; an ash conveying baffle is arranged in the conveying groove body; the ash conveying baffle is arranged on the lower side of the powder discharging opening close to the outlet. The lower end of the discharging pipe is vertically connected with an ash conveying pipe, one end of the ash conveying pipe is connected with an air source assembly, and the other end of the ash conveying pipe is connected with a dust removal system main pipeline. Discontinuous powder feeding and continuous powder feeding are achieved by controlling the movement mode of the driving device, the powder spraying requirements under different working conditions are met, and compatibility is high; and the ash conveying baffle is additionally arranged, the structure of the powder discharging opening is optimized, the more accurate powder discharging amount can be guaranteed in the operation period of the vibrator, the precision of the powder spraying device is improved, and meanwhile the fault rate is reduced.

Description

Technical Field

[0001] This utility model relates to the field of powder spraying equipment for explosion-proof dust removal systems, and in particular to a novel automatic powder spraying device. Background Technology

[0002] Automatic powder spraying devices are used in conjunction with explosion-proof industrial dust collection systems. They draw inert dust from the equipment into the main duct of the dust collection system using negative pressure, mixing it with the existing dust to reduce its flammability and explosiveness. This allows the explosion-proof industrial dust collector to be used in flammable and explosive environments, and features portability, stable powder output, and a small footprint.

[0003] However, current powder spraying devices involve a conveyor directly connected to the ash conveying pipeline. A PLC-controlled stepper motor periodically starts, driving the auger of the screw conveyor to transport inert dust from the ash hopper to the ash conveying pipeline. The dust is then carried away by the negative pressure in the main dust collection system. This method carries the risk of powder in the ash hopper being directly sucked away by the negative pressure in the main dust collection pipeline, resulting in low powder dispensing accuracy and large errors in the amount dispensed. Furthermore, during ash conveying, a vibrator is used in conjunction with the ash hopper for dispensing. In actual use, this causes powder deviation during vibrator operation, making it impossible to guarantee a more precise powder dispensing amount and resulting in poor accuracy. Summary of the Invention

[0004] To address the above problems, this utility model provides a novel automatic powder spraying device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A novel automatic powder spraying device includes a shell, a dust hopper, a screw conveyor, a feeding pipe, a dust conveying pipe, an air source assembly, and a control system.

[0007] The ash hopper is fixed inside the shell, and the lower end of the ash hopper is provided with a discharge port;

[0008] The spiral conveying device includes a driving device, a conveying trough, and spiral blades. A powder discharge port is provided at the top of the conveying trough, and the powder discharge port is connected to the discharge port. The driving device is installed at one end of the conveying trough, and the spiral blades are disposed in the conveying trough. An outlet is provided at the bottom of the other end of the conveying trough. An ash conveying baffle is provided in the conveying trough. The ash conveying baffle is disposed on the lower side of the powder discharge port near the outlet.

[0009] The outlet is connected to the upper end of the feed pipe, the lower end of the feed pipe is vertically connected to the ash conveying pipe, the ash conveying pipe is horizontally arranged, one end of the ash conveying pipe is connected to the air source assembly through the first pipe, and the other end of the ash conveying pipe is connected to the main pipe of the dust removal system through the connecting pipe; the first pipe is equipped with a blower valve, and the connecting pipe is equipped with an outlet electric valve;

[0010] The control system is mounted on the housing and is electrically connected to the drive device, air source assembly, jet valve, and outlet electric valve.

[0011] Furthermore, the upper outer side of the ash hopper is provided with an outward-turning flange, the upper part of the shell is provided with a partition plate, the partition plate is provided with mounting holes, the ash hopper is placed in the mounting holes, and the lower surface of the outward-turning flange abuts and fits against the upper surface of the partition plate.

[0012] Furthermore, a weighing sensor is provided between the lower surface of the outward-facing flange and the upper surface of the partition.

[0013] Furthermore, the ash conveying baffle includes a connecting plate and a baffle body. The baffle body includes a vertically arranged horizontal plate and a vertical plate. The upper end of the vertical plate is fixed to the lower surface of one side of the horizontal plate, and the lower end of the connecting plate is fixed to the upper surface of the other side of the horizontal plate. The connecting plate is fixed to the inner wall of the bottom of the ash hopper. The horizontal plate is horizontally arranged and flush with the powder outlet. The two sides of the vertical plate are connected to the inner wall of the conveying trough. The middle of the vertical plate has a U-shaped opening for the spiral blade to pass through, and the opening direction of the U-shaped opening is downward.

[0014] Furthermore, the connecting plate and the baffle body are integrally connected.

[0015] Furthermore, the lower part of the ash hopper is a four-sided cone, the discharge port is a rectangular opening, the powder discharge port has the same structure as the discharge port, and the conveying trough is a trapezoidal trough.

[0016] Furthermore, a vibrator is installed on the lower outer side of the ash hopper, and the vibrator is electrically connected to the control system.

[0017] Furthermore, the top of the ash hopper has a feed inlet, and the top of the shell has an opening that corresponds to the position of the feed inlet of the ash hopper. A door panel is installed at the opening via a hinge.

[0018] Furthermore, the driving device is a stepper motor.

[0019] Furthermore, the bottom of the housing is provided with rollers.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) This utility model adds a ash conveying baffle in the conveying trough of the powder outlet, optimizes the structure of the powder outlet, and ensures a more accurate powder dispensing amount during the operation of the rapper, improves the accuracy of the powder spraying device, and reduces the failure rate. At the same time, through the ash conveying baffle, the outlet and the powder outlet are prevented from being close to each other, the powder in the ash hopper is prevented from being sucked away by negative pressure, the waste of inert powder is avoided, inert dust is saved, and the dispensing accuracy is improved. (2) This utility model selects a stepper motor for powder conveying, ensuring that the drive device can run at a low speed and can drive the spiral blades at a very low speed, making the powder dispensing more uniform and the powder dispensing accuracy higher. By controlling the movement mode of the stepper motor through the control system, two powder dispensing modes, intermittent powder dispensing and continuous powder dispensing, can be realized to meet the powder spraying requirements under different working conditions and have stronger compatibility. Attached Figure Description

[0021] Figure 1 This is a front view of a novel automatic powder spraying device according to this utility model;

[0022] Figure 2 This is a three-dimensional structural diagram of a novel automatic powder spraying device according to the present invention;

[0023] Figure 3 This is a schematic diagram of the top structure of a novel automatic powder spraying device according to the present invention;

[0024] Figure 4 This is a schematic diagram of the ash conveying baffle of a novel automatic powder spraying device according to this utility model.

[0025] Figure 5 This is a three-dimensional structural diagram of the rear side of a novel automatic powder spraying device according to the present invention. Detailed Implementation

[0026] To provide a better understanding of the purpose, structure, features, and functions of this utility model, detailed descriptions are provided below with reference to specific embodiments.

[0027] Please refer to the reference. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 An embodiment of the present invention provides a novel automatic powder spraying device, comprising a housing 100, an ash hopper 200, a screw conveyor 300, a discharge pipe 400, an ash conveying pipe 500, an air source assembly 600, and a control system 700; the air source assembly 600 includes a gas storage device and an air source dual unit, etc., and the control system 700 is connected to the air source dual unit for air source blowing to avoid ash residue in the ash conveying pipe.

[0028] The ash hopper 200 is fixed inside the housing 100, and the lower end of the ash hopper 200 is provided with a discharge port 210; material is discharged from the lower end of the ash hopper 200.

[0029] The spiral conveying device 300 includes a drive unit 310, a conveying trough 320, and spiral blades 330. A powder discharge port 321 is located above the conveying trough 320 and is connected to the discharge port 210. The drive unit 310 is installed at one end of the conveying trough 320, and the spiral blades 330 are disposed within the conveying trough 320. The output shaft of the drive unit 320 is connected to the spiral blades 330. An outlet 322 is located below the other end of the conveying trough 320. A conveying baffle 800 is provided; the conveying baffle 800 is located on the lower side of the powder discharge port 321 near the outlet 322; during operation, the powder enters the conveying trough 320 from below the ash hopper 200 through the powder discharge port 321, and is conveyed to one side of the outlet 322 by the rotation of the spiral blades 330, and finally discharged from the outlet. The conveying baffle 800 avoids the outlet 322 from being close to the powder discharge port 321, and minimizes the risk of the powder in the ash hopper 200 being sucked away by negative pressure, thus avoiding the waste of inert powder, saving inert dust, and improving the feeding accuracy.

[0030] The outlet 322 is connected to the upper end of the feed pipe 400, and the lower end of the feed pipe 400 is vertically connected to the ash conveying pipe 500. The ash conveying pipe 500 is horizontally arranged, with one end connected to the air source assembly 600 via a first pipe, and the other end connected to the main pipe of the dust removal system via a connecting pipe 900. The first pipe is a flexible hose for easy connection. A blow valve 610 is provided on the first pipe, and an outlet electric valve 910 is provided on the connecting pipe 900. The blow valve 610 is a solenoid valve. This facilitates electrical connection control of the control system to control the on / off state of the blow valve and the outlet electric valve, which is beneficial for automated control.

[0031] The control system 700 is disposed on the housing 100 and is electrically connected to the drive device 310, the air source assembly 600, the jet valve 610 and the outlet electric valve 910.

[0032] When this device is in operation, it is first powered on, and the control system 700 is connected to the power supply. After the device is started, the control system 700 controls the outlet electric valve 610 to open, and simultaneously controls the drive device 310 to rotate, driving the spiral blades 330 to rotate and convey inert powder. The inert powder falls from the feed pipe 400 and is conveyed into the ash conveying pipe 500. Then, the dust is carried away by the negative pressure in the main pipeline of the dust removal system. The control system 310 controls the blowing valve 610 to open periodically. The blowing valve 610 at the end of the ash conveying pipe 500 periodically starts blowing action to clean the residual dust in the ash conveying pipe 500. This avoids dust residue and prevents powder waste.

[0033] The ash hopper 200 has an outward-flaring flange 220 on its upper outer side. The upper part of the housing 100 has a partition 110 with mounting holes. The ash hopper 200 is placed within these mounting holes, and the lower surface of the outward-flaring flange 220 abuts against the upper surface of the partition 110. The mounting holes are larger than the ash hopper 200 but smaller than the outward-flaring flange 220, facilitating the installation and configuration of the ash hopper 200. The outward-flaring flange 220 further enhances the ease of installation and use of the ash hopper 200.

[0034] A weighing sensor 120 is provided between the lower surface of the outward-facing flange 220 and the upper surface of the partition plate 110. Four sensors can be configured, two on each of the front and rear sides. The weighing sensor 120 is a high-precision single-point weighing sensor, ensuring real-time monitoring of the amount of powder dispensed and the amount of remaining powder, guaranteeing the accuracy of the material dispensing and facilitating material control.

[0035] The ash conveying baffle 800 includes a connecting plate 810 and a baffle body 820. The baffle body 820 includes a vertically arranged horizontal plate 821 and a vertical plate 822. The upper end of the vertical plate 822 is fixed to the lower surface of one side of the horizontal plate 821, and the lower end of the connecting plate 810 is fixed to the upper surface of the other side of the horizontal plate 821. The connecting plate 810 is fixed to the inner wall of the bottom of the ash hopper 200. The horizontal plate 821 is horizontally arranged and flush with the powder discharge port 321. The two sides of the vertical plate 822 are connected to the inner wall of the conveying trough 320. The middle part of the vertical plate 822 has a U-shaped opening 823 for the spiral blade to pass through, and the opening direction of the U-shaped opening 823 is downward. When the powder is conveyed to the ash conveying baffle at 800, the inert powder is conveyed through the U-shaped opening 823, removing the powder outside the U-shaped opening 823. This ensures a stable conveying volume, is less affected by vibration, and the ash conveying baffle supports the conveying trough, preventing deformation and extending its service life. This device optimizes the powder outlet structure, enabling more precise powder dispensing even during vibrator operation, improving the accuracy of the powder spraying device and reducing the failure rate.

[0036] The connecting plate 810 and the baffle body 820 are integrally connected. The ash conveying baffle 800 can be manufactured by integral casting or sheet metal bending to ensure the strength of the ash conveying baffle 800, avoid breakage at the connection, and ensure a smooth surface and connection to reduce the residue of inert powder.

[0037] The lower part of the ash hopper 200 is a four-sided cone, the discharge port 210 is a rectangular opening, the powder discharge port 321 has the same structure as the discharge port 210, and the conveying trough 320 is a trapezoidal trough. This design ensures that the powder easily gathers, facilitates smooth discharge, and the trapezoidal trough ensures that the material flows more easily during conveying, preventing accumulation and blockage within the conveying trough 320 and ensuring discharge accuracy.

[0038] A vibrator 230 is installed on the lower outer side of the ash hopper 200, and the vibrator 230 is electrically connected to the control system 700. The control system 700 controls the vibrator 230 to operate at regular intervals, which can effectively avoid dust bridging, promote the continuity and stability of inert dust feeding, facilitate smooth and uniform feeding, avoid blockage, and prevent affecting the feeding accuracy.

[0039] The top of the ash hopper 200 has a feed inlet 240, and the top of the shell has an opening 130, which corresponds to the position of the feed inlet 240 of the ash hopper. A door panel 140 is installed at the opening 130 via a hinge. This facilitates the replenishment of powder in the ash hopper 200 through top feeding, while the door panel 140 prevents external environmental contamination of the powder and avoids dust pollution caused by powder flying, which could affect health.

[0040] The drive device 310 is a stepper motor. Choosing a stepper motor ensures stable low-speed operation, enabling the spiral blades to move at extremely low speeds, resulting in more uniform powder application and higher precision. The control system 700 controls the stepper motor's movement to achieve both intermittent and continuous powder application, meeting the powder spraying requirements under different working conditions and offering greater compatibility.

[0041] The bottom of the housing 100 is provided with casters 150. This facilitates the movement of the device and makes it easy to use.

[0042] This utility model has been described by the above-described embodiments; however, these embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the spirit and scope of this utility model are within the scope of patent protection of this utility model.

Claims

1. A novel automatic powder spraying device, characterized in that: It includes the shell, ash hopper, screw conveyor, discharge pipe, ash conveying pipe, air source components, and control system; The ash hopper is fixed inside the shell, and the lower end of the ash hopper is provided with a discharge port; The spiral conveying device includes a driving device, a conveying trough, and spiral blades. A powder discharge port is provided at the top of the conveying trough, and the powder discharge port is connected to the discharge port. The driving device is installed at one end of the conveying trough, and the spiral blades are disposed in the conveying trough. An outlet is provided at the bottom of the other end of the conveying trough. An ash conveying baffle is provided in the conveying trough. The ash conveying baffle is disposed on the lower side of the powder discharge port near the outlet. The outlet is connected to the upper end of the feed pipe, the lower end of the feed pipe is vertically connected to the ash conveying pipe, the ash conveying pipe is horizontally arranged, one end of the ash conveying pipe is connected to the air source assembly through the first pipe, and the other end of the ash conveying pipe is connected to the main pipe of the dust removal system through the connecting pipe; the first pipe is equipped with a blower valve, and the connecting pipe is equipped with an outlet electric valve; The control system is mounted on the housing and is electrically connected to the drive device, air source assembly, jet valve, and outlet electric valve.

2. The novel automatic powder spraying device as described in claim 1, characterized in that: The upper outer side of the ash hopper is provided with an outward flange, the upper part of the shell is provided with a partition plate, the partition plate is provided with mounting holes, the ash hopper is placed in the mounting holes, and the lower surface of the outward flange abuts and fits against the upper surface of the partition plate.

3. The novel automatic powder spraying device as described in claim 2, characterized in that: A weighing sensor is provided between the lower surface of the outward-facing flange and the upper surface of the partition.

4. The novel automatic powder spraying device as described in claim 1, characterized in that: The ash conveying baffle includes a connecting plate and a baffle body. The baffle body includes a vertically arranged horizontal plate and a vertical plate. The upper end of the vertical plate is fixed to the lower surface of one side of the horizontal plate, and the lower end of the connecting plate is fixed to the upper surface of the other side of the horizontal plate. The connecting plate is fixed to the inner wall of the bottom of the ash hopper. The horizontal plate is horizontally arranged and flush with the powder outlet. The two sides of the vertical plate are connected to the inner wall of the conveying trough. The middle of the vertical plate has a U-shaped opening for the spiral blades to pass through, and the opening direction of the U-shaped opening is downward.

5. The novel automatic powder spraying device as described in claim 4, characterized in that: The connecting plate and the baffle body are integrated.

6. The novel automatic powder spraying device as described in claim 1, characterized in that: The lower part of the ash hopper is a four-sided cone, the discharge port is a rectangular opening, the powder discharge port has the same structure as the discharge port, and the conveying trough is a trapezoidal trough.

7. The novel automatic powder spraying device as described in claim 1, characterized in that: A vibrator is installed on the lower outer side of the ash hopper, and the vibrator is electrically connected to the control system.

8. The novel automatic powder spraying device as described in claim 1, characterized in that: The top of the ash hopper has a feed inlet, and the top of the shell has an opening that corresponds to the position of the feed inlet of the ash hopper. A door panel is installed at the opening via a hinge.

9. The novel automatic powder spraying device as described in claim 1, characterized in that: The driving device is a stepper motor.

10. The novel automatic powder spraying device as described in claim 1, characterized in that: The bottom of the housing is equipped with rollers.

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