Explosion-proof safety device for sprayed powder recovery

Abstract

Provided is a sprayed powder recovery anti-explosion safety device. Relates to the technical field of powder spraying equipment. The device is arranged on the inner side of a recovery tank, a powder suction pipe is arranged on the top of the recovery tank, an exhaust pipe is arranged at the bottom of the recovery tank, the powder suction pipe is used for sucking external sprayed powder into the inner side of the recovery tank, the device comprises a spraying mechanism and a material receiving mechanism, and the spraying mechanism comprises a mounting ring and a plurality of spraying heads arranged at the bottom of the mounting ring; the plurality of spray heads form a water curtain in the recovery tank; the material collecting mechanism comprises a material collecting hopper, the mounting ring is arranged on the upper portion of the inner side of the recycling tank, the material collecting hopper is arranged on the lower portion of the inner side of the recycling tank, and the sprayed powder penetrates through the water curtain and falls into the inner side of the material collecting hopper. According to the spraying device, through the spraying effect of the spraying mechanism on the sprayed powder sucked into the recycling tank, rapid sedimentation of the sprayed powder is promoted, then the dust concentration of the sprayed powder in the recycling tank is reduced, and dust explosion is prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of powder spraying equipment, in particular to a powder spraying recovery anti-explosion safety device. BACKGROUND

[0002] In the powder spraying process, the workpiece is sent into the recovery spraying room, and the workpiece is sprayed with powder by the spray gun. The excess powder that is not sprayed onto the workpiece is directly extracted by an air extractor or the like. However, this method may cause environmental pollution. To solve this problem, a special powder spraying recovery device is generally used to recover the powder.

[0003] In the Chinese patent document with the publication number CN219129665U, a powder spraying recovery device is disclosed, and specifically, a recovery box and a powder filtering net cylinder arranged in the recovery box are disclosed. A powder inlet pipe is arranged on one side of the top of the recovery box, and a negative pressure pipe is arranged on the other side of the bottom of the recovery box. Powder flows through the powder inlet pipe, the powder filtering net cylinder and the negative pressure pipe in sequence. A separation funnel is arranged in the recovery box to guide the powder into the powder filtering net cylinder, so as to separate the recovery box into a powder inlet space and a powder outlet space. The separation funnel is in communication with the top of the powder filtering net cylinder. The recovery box is provided with an anti-explosion pipe in communication with the powder outlet space. The port of the anti-explosion pipe is provided with an explosion membrane capable of bearing a preset pressure. The use of the utility model can easily recover the powder and avoid the serious damage of explosion to the equipment.

[0004] However, the above-mentioned patent can only control the damage degree of dust explosion to the equipment, but cannot completely prevent the occurrence of dust explosion, and there is still a great safety hazard. Utility model content

[0005] In order to overcome the shortcomings of the prior art, the present application provides a powder spraying recovery anti-explosion safety device.

[0006] The present application adopts the following technical scheme: a powder spraying recovery anti-explosion safety device is arranged on the inner side of a recovery tank. A powder suction pipe is arranged on the top of the recovery tank, and an exhaust pipe is arranged on the bottom of the recovery tank. The powder suction pipe is used to suck the external powder into the inner side of the recovery tank. The device comprises a spraying mechanism and a material collecting mechanism. The spraying mechanism comprises a mounting ring and a plurality of spraying heads arranged on the bottom of the mounting ring. The plurality of spraying heads form a water curtain in the recovery tank.

[0007] The material collecting mechanism comprises a material collecting hopper. The mounting ring is arranged on the upper part of the inner side of the recovery tank. The material collecting hopper is arranged on the lower part of the inner side of the recovery tank. The powder passes through the water curtain and falls into the inner side of the material collecting hopper.

[0008] Optionally, a support for fixing the mounting ring is arranged in the recovery tank. The mounting ring is coaxially arranged with the powder suction pipe. The inner diameter of the mounting ring is greater than the inner diameter of the powder suction pipe.

[0009] Optionally, the suction tube is provided with a gas conveying pipe, one end of the gas conveying pipe is communicated with the suction tube, the other end of the gas conveying pipe is communicated with a nitrogen source, the nitrogen source is used for conveying nitrogen into the gas conveying pipe, the inner side of the recovery tank is provided with a dust concentration sensor, the dust concentration sensor is used for collecting the dust concentration in the recovery tank, the dust concentration sensor is electrically connected to a controller, and the controller is used for controlling the opening and closing of the nitrogen source.

[0010] Optionally, the lower part of the inner wall of the recovery tank is provided with a pair of through holes, the material collecting hopper comprises a pair of vertical plates and a filter plate arranged between the pair of vertical plates, the filter plate is in a U shape, and the pair of vertical plates are respectively and one-to-one arranged in the pair of through holes.

[0011] The inner wall of the recovery tank is further provided with a support ring, and the vertical plate and the filter plate can slide on the support ring.

[0012] Optionally, the through hole penetrates the inner wall of the recovery tank, and the thickness of the vertical plate is not greater than the thickness of the inner wall of the recovery tank.

[0013] Compared with the prior art, the spraying mechanism in the application promotes the rapid settling of the sprayed powder inhaled into the recovery tank through the spraying action, thereby reducing the dust concentration of the sprayed powder in the recovery tank and preventing dust explosion. Further, through the control of the dust concentration sensor, the controller and the nitrogen source, nitrogen can be quickly filled when the dust concentration in the recovery tank is too high, so as to achieve the explosion-proof effect by reducing the oxygen content in the recovery tank. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic diagram of the application;

[0015] Figure 2 is a motion state reference diagram of the application;

[0016] Figure 3 is a structural schematic diagram of the material collecting hopper;

[0017] Figure 4 is an assembly state reference diagram of the mounting ring and the spraying head;

[0018] In the figure: 1, recovery tank; 11, suction tube; 12, exhaust pipe; 13, gas conveying pipe; 14, dust concentration sensor; 15, through hole; 16, support ring; 2, spraying mechanism; 21, mounting ring; 22, spraying head; 23, support; 3, material collecting mechanism; 31, vertical plate; 32, filter plate. DETAILED DESCRIPTION

[0019] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0020] like Figures 1-4 As shown, the powder spraying recovery explosion-proof safety device is located inside the recovery tank 1. The top of the recovery tank 1 is equipped with a powder suction pipe 11 and the bottom is equipped with an exhaust pipe 12. The powder suction pipe 11 is used to suck the external powder spraying into the inside of the recovery tank 1. It includes a spraying mechanism 2 and a receiving mechanism 3. The spraying mechanism 2 includes a mounting ring 21 and a plurality of spray heads 22 located at the bottom of the mounting ring 21. The plurality of spray heads 22 form a water curtain inside the recovery tank 1. The receiving mechanism 3 includes a receiving hopper. The mounting ring 21 is located at the upper part of the inside of the recovery tank 1, and the receiving hopper is located at the lower part of the inside of the recovery tank 1. The powder spraying passes through the water curtain and falls into the inside of the receiving hopper.

[0021] Once the external powder is sucked into the inside of the recovery tank 1, the spray mechanism 2 can start working. Specifically, several spray heads 22 will form a water curtain inside the recovery tank 1. In this way, the powder will combine with the water droplets in the water curtain as it moves downward, thereby achieving rapid settling of the powder and reliably reducing the dust concentration inside the recovery tank 1, effectively preventing dust explosions.

[0022] The recycling tank 1 is equipped with a bracket 23 for fixing the mounting ring 21. A water pipe for supplying water to the spray head 22 can pass through the mounting ring 21. The mounting ring 21 is coaxially arranged with the powder suction pipe 11, and the inner diameter of the mounting ring 21 is larger than that of the powder suction pipe 11. With the connection and fixation of the bracket 23, the mounting ring 21 can be in a reliable working state, thereby enabling the spray head 22 at the bottom of the mounting ring 21 to reliably spray downwards. The larger inner diameter of the mounting ring 21 ensures that the powder, after entering the recycling tank 1, can pass through the mounting ring 21 and flow downwards, reducing the amount of powder falling onto the mounting ring 21.

[0023] A gas delivery pipe 13 is provided on the dust suction pipe 11. One end of the gas delivery pipe 13 is connected to the dust suction pipe 11, and the other end is connected to a nitrogen source. The nitrogen source is used to deliver nitrogen into the gas delivery pipe 13. A dust concentration sensor 14 is provided inside the recovery tank 1. The dust concentration sensor 14 is used to collect the dust concentration in the recovery tank 1. The dust concentration sensor 14 is electrically connected to a controller, which is used to control the opening and closing of the nitrogen source. The dust concentration sensor 14 can collect the dust concentration data in the recovery tank 1 in real time. When the collected dust concentration data reaches a threshold, the controller will turn on the nitrogen source, and the nitrogen source can quickly deliver nitrogen into the gas delivery pipe 13. The nitrogen enters the dust suction pipe 11 through the gas delivery pipe 13, thereby mixing with the air and dust in the dust suction pipe 11, effectively reducing the oxygen content in the recovery tank 1, and thus preventing the dust concentration from becoming too high and causing an explosion.

[0024] The lower part of the inner wall of the recovery tank 1 is provided with a pair of through holes 15, the collecting hopper comprises a pair of vertical plates 31 and a filter plate 32 arranged between the pair of vertical plates 31, the filter plate 32 is in a U shape, and the pair of vertical plates 31 are respectively and one-to-one arranged in the pair of through holes 15; the inner wall of the recovery tank 1 is further provided with a support ring 16, and the vertical plate 31 and the filter plate 32 can slide on the support ring 16. When the pair of vertical plates 31 are inserted into the through holes 15, the collecting hopper as a whole is in a position-fixed state, at this time, the powder sprayed through the water curtain will fall on the filter plate 32 and be intercepted by the filter plate 32, and the air or nitrogen gas and the like can pass through the filter plate 32 and be discharged through the exhaust pipe 12, so that the recovery of the sprayed powder is realized.

[0025] The through holes 15 penetrate the inner wall of the recovery tank 1, and the thickness of the vertical plate 31 is not greater than the thickness of the inner wall of the recovery tank 1, so that the vertical plate 31 can block the through holes 15, and it is ensured that the sprayed powder will not leak from the through holes 15 in the process of recovering the sprayed powder. Further, when the amount of the sprayed powder recovered by one collecting hopper is relatively large, another collecting hopper can be inserted into any one of the through holes 15, and then the collecting hopper is continuously inserted into the recovery tank 1, so that the two collecting hoppers are abutted to each other and slide on the support ring 16 at the same time, and the rapid replacement of the collecting hoppers is realized.

[0026] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application, and any non-essential changes and replacements made by those skilled in the art on the basis of the present application all belong to the scope of protection of the present application.

Claims

1. A powder spraying recovery explosion-proof safety device is arranged in the inside of a recovery tank (1), the top of the recovery tank (1) is provided with a powder suction pipe (11), the bottom is provided with an exhaust pipe (12), the powder suction pipe (11) is used for sucking the external powder into the inside of the recovery tank (1), characterized in that, The device comprises a spraying mechanism (2) and a collecting mechanism (3), the spraying mechanism (2) comprises a mounting ring (21) and a plurality of spraying heads (22) arranged at the bottom of the mounting ring (21), the plurality of spraying heads (22) form a water curtain in the recycling tank (1); The collecting mechanism (3) comprises a collecting hopper, the mounting ring (21) is arranged at the upper inner side of the recycling tank (1), the collecting hopper is arranged at the lower inner side of the recycling tank (1), the powder sprayed passes through the water curtain and falls into the collecting hopper.

2. The dusting recovery explosion-proof safety device according to claim 1, characterized in that, The recycling tank (1) is provided with a support (23) for fixing the mounting ring (21), the mounting ring (21) is coaxially arranged with the powder suction pipe (11), and the inner diameter of the mounting ring (21) is greater than the inner diameter of the powder suction pipe (11).

3. The dusting recovery explosion-proof safety device of claim 2, wherein, The powder suction pipe (11) is provided with a gas conveying pipe (13), one end of the gas conveying pipe (13) communicates with the powder suction pipe (11), the other end of the gas conveying pipe (13) communicates with a nitrogen source, the nitrogen source is used for conveying nitrogen into the gas conveying pipe (13), the inner side of the recycling tank (1) is provided with a dust concentration sensor (14), the dust concentration sensor (14) is used for collecting the dust concentration in the recycling tank (1), the dust concentration sensor (14) is electrically connected to a controller, and the controller is used for controlling the opening and closing of the nitrogen source.

4. The dusting recovery explosion-proof safety device of claim 1, wherein, The lower part of the inner wall of the recycling tank (1) is provided with a pair of perforations (15), the collecting hopper comprises a pair of vertical plates (31) and a filter plate (32) arranged between the pair of vertical plates (31), the filter plate (32) is in a U shape, and a pair of vertical plates (31) are respectively and one-to-one arranged in a pair of perforations (15). The inner wall of the recycling tank (1) is further provided with a support ring (16), and the vertical plate (31) and the filter plate (32) can slide on the support ring (16).

5. The dusting recovery explosion-proof safety device of claim 4, wherein, The perforations (15) penetrate the inner wall of the recycling tank (1), and the thickness of the vertical plate (31) is not greater than the thickness of the inner wall of the recycling tank (1).

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