A wind tube reversing device for a dry electrostatic spray booth and a method of using the same

Abstract

This invention provides a duct reversing device and its usage method for dry electrostatic spraying booths, solving the problems of large-diameter pipes in current recycling systems that require frequent cleaning, resulting in difficult, time-consuming, and labor-intensive disassembly, prolonged downtime, and low work efficiency. It includes a T-shaped base and a T-shaped pipe. The T-shaped pipe includes a main pipe connected to the spray booth interface and two branch pipes. The ends of the two branch pipes are connected to the inner end of a central connecting pipe via an elastic telescopic adjustment device. The outer end of the central connecting pipe is connected to the recycling system device. The elastic telescopic adjustment device includes a set of parallel cylinder connecting plates and an adjusting cylinder connected between the cylinder connecting plates. By adjusting the cylinder, a second cylinder moving plate moves left and right to compress the sealing ring, controlling the adhesion force between the sealing ring and the sealing gasket, and selectively inserting a reversing baffle. It can be widely used in the field of pipe coating technology.

Description

Technical Field

[0001] This invention relates to the field of pipe coating technology, specifically to a duct reversing device for a dry electrostatic spray booth and its usage method. Background Technology

[0002] The existing dry electrostatic spraying booth and recycling system are usually connected using Φ400 sheet metal ducts. However, for large-diameter, inorganic particulate materials with high friction, the high friction makes them prone to clogging and damage, and the control switch has low precision. This makes it impossible to use existing three-way valves such as butterfly valves and solenoid valves to achieve automatic adjustment and switching of branch connections, which affects their use in electrostatic spraying booth systems.

[0003] In existing technologies, a single spray coating pipeline paint transport system requires a matching sintering recovery system. Because ceramic powder consists of small particles, each time a recovery system is replaced, the internal pipelines of the recovery system need to be cleaned. Furthermore, due to the large pipe diameter, each cleaning of the paint powder requires repeated disassembly of the existing equipment, wasting significant time and causing production downtime, severely impacting the overall spraying efficiency. Currently, the basic requirement for replacing the recovery system in powder coating processes is at least three times every eight hours, with each replacement taking approximately 20 minutes. Each cleaning requires a long downtime, greatly reducing overall work efficiency. Therefore, there is an urgent need for a device that allows for rapid replacement of the recovery system to improve spraying efficiency. Summary of the Invention

[0004] This invention addresses the shortcomings and deficiencies of existing technologies by providing a device with a simple and ingenious structure that can simultaneously configure and select two sintered plate recycling systems. It is easy to use and install, allowing for short-term line stoppage during recycling system cleaning to complete pipeline replacement, saving time and labor. It significantly improves spraying efficiency, meets the practical needs of switching between large-size pipelines and particulate fluids, and is widely applicable to duct reversing devices and their usage methods in dry electrostatic spraying booths.

[0005] To achieve the above objectives, the present invention provides the following technical solution: The duct reversing device for a dry electrostatic spray booth provided by the present invention includes a three-way base, on which a horizontally arranged three-way pipe is fixedly installed; the three-way pipe includes a vertically arranged main pipeline connected to the spray booth interface and two horizontally arranged branch pipelines, the ends of the two branch pipelines are connected to the inner end of the intermediate connecting pipe through an elastic telescopic adjustment device, and the outer end of the intermediate connecting pipe is connected to the recovery system device;

[0006] The elastic telescopic adjustment device includes a set of parallel cylinder connecting plate assemblies and an adjusting cylinder connected between the cylinder connecting plate assemblies. The cylinder connecting plate assemblies are fixedly sleeved on the first cylinder fixing plate and the second cylinder moving plate of the branch pipeline. A sealing ring is fixedly sleeved at the outer end of the branch pipeline. The second cylinder moving plate is snapped onto the sealing ring. The inner end of the intermediate connecting pipe is sealed to the sealing ring through a mating flange and a sealing gasket. The adjusting cylinder drives the second cylinder moving plate to move left and right to squeeze the sealing ring, thereby controlling the bonding force between the sealing ring and the sealing gasket. A reversing baffle is selectively inserted into it.

[0007] Preferably, the thickness of the sealing ring is greater than the thickness of the second cylinder moving plate, and the outer diameter of the reversing baffle matches the outer diameter of the docking flange and is greater than the inner diameter of the branch pipeline.

[0008] Preferably, a lifting ring is provided on the outer edge of the reversing baffle, and a set of limiting blocks are provided on the upper edge of the reversing baffle along the axial direction.

[0009] Preferably, the cylinder connecting plate assembly is a square frame plate, and each of the four top corners of the first cylinder fixing plate is provided with a horizontally arranged synchronous adjusting cylinder. The end of the telescopic rod of the synchronous adjusting cylinder is connected to the second cylinder moving plate. Eight adjusting cylinders are installed on the branch pipes on the left and right sides of the tee, all of which are synchronous adjusting cylinders connected to the controller.

[0010] Preferably, the bottom of the first cylinder fixing plate is fixedly connected to the tee base via a tee fixing plate; the bottom of both the inner and outer ends of the intermediate connecting pipe are also fixedly connected to the tee base via flange fixing bases.

[0011] Preferably, the sealing ring is made of foamed silicone and the sealing gasket is made of nitrile rubber.

[0012] Preferably, the second cylinder moving plate has an upper and lower split snap-fit ​​structure along the outer end of the branch pipe. The upper and lower half plates are detachably fixed together by a connecting plate. The sealing ring is snapped and fixed at the outer end of the branch pipe by the upper and lower half plates of the second cylinder moving plate.

[0013] Preferably, the outer end of the main pipeline is detachably and fixedly connected to the interface of the spray booth via a spray booth docking flange.

[0014] This invention also discloses a method for using a duct reversing device in a dry electrostatic spray booth, specifically including the following steps:

[0015] When a reversal is required, the controller controls the telescopic rods of the adjusting cylinders on the first cylinder fixing plates on both sides to retract inward simultaneously. The telescopic rods drive the second cylinder moving plate to retract inward, while simultaneously squeezing the sealing ring inward, reducing the adhesion between the sealing ring and the sealing gasket and creating a gap. The reversing baffle is then selectively inserted between the sealing ring and the sealing gasket on the side to be closed, thereby closing the corresponding branch pipeline.

[0016] Then, the controller controls the telescopic rods of the adjusting cylinders on the first cylinder fixing plates on both sides to extend outward simultaneously. The telescopic rods drive the second cylinder moving plate to move outward, while increasing the outward squeezing force on the sealing ring. This increases the adhesion between the sealing ring and the sealing gasket, and after the gap is eliminated, the steering adjustment is completed.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] (1) The air duct reversing device of the present invention for dry electrostatic spraying room has a simple and ingenious structure. It can be configured with two sets of sintered plate recycling systems at the same time. It is easy to use and install. When the recycling system is cleaning, the line can be stopped for a short time to complete the replacement of the pipeline, saving time and effort, improving the convenience of replacing ceramic powder, and significantly improving the spraying efficiency.

[0019] (2) The present invention is used in the air duct reversing device of the dry electrostatic spraying room, wherein the foamed silicone material of the sealing ring and the nitrile rubber material of the sealing gasket work together to significantly improve the effectiveness of controlling the adhesion force between the sealing ring 5 and the sealing gasket, meeting the actual use requirements of switching large-size pipelines and particulate fluids, and has a wide range of applications. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the main view structure of the present invention;

[0022] Figure 3 This is a top view structural diagram of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the invention from the left side view.

[0024] Figure 5 for Figure 1 Enlarged structural diagram of part A in the middle;

[0025] Figure 6 This is a schematic diagram of the three-way pipe structure of the present invention.

[0026] In the diagram: 1. T-shaped base; 2. Main pipe; 3. Branch pipe; 4. Adjusting cylinder; 5. Sealing ring; 6. Sealing gasket; 7. First cylinder fixing plate; 8. Second cylinder moving plate; 9. Reversing baffle; 10. Lifting ring; 11. Spray booth connecting flange; 12. T-shaped fixing plate; 13. Limit block. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] Please see Figures 1-6 The present invention provides a duct reversing device for a dry electrostatic spray booth, comprising a three-way base 1, on which a horizontally arranged three-way pipe is fixedly installed. The three-way pipe includes a vertically arranged main pipe 2 connected to the spray booth interface and two horizontally arranged branch pipes 3. The ends of the two branch pipes 3 are connected to the inner end of an intermediate connecting pipe through an elastic telescopic adjustment device, and the outer end of the intermediate connecting pipe is connected to a recovery system device. In this embodiment of the invention, the outer end of the main pipe 2 is detachably and fixedly connected to the spray booth interface through a spray booth docking flange 11, facilitating assembly, disassembly, and maintenance. The elastic telescopic adjustment device of this invention includes a set of parallel cylinder connecting plate assemblies and an adjusting cylinder 4 connected between the cylinder connecting plate assemblies. The cylinder connecting plate assemblies are fixedly sleeved on a first cylinder fixing plate 7 and a second cylinder moving plate 8 on a branch pipe 3. A sealing ring 5 is fixedly sleeved at the outer end of the branch pipe 3. The second cylinder moving plate 8 is snapped onto the sealing ring 5. The inner end of the intermediate connecting pipe is sealed to the sealing ring 5 through a butt flange and a sealing gasket 6. The adjusting cylinder 4 drives the second cylinder moving plate 8 to move left and right to squeeze the sealing ring 5, thereby controlling the adhesion between the sealing ring 5 and the sealing gasket 6. A reversing baffle 9 can be selectively inserted to selectively control the closing and opening of the two branch pipes 3 of the tee pipe. Two sets of sintered plate recycling systems can be configured and selected simultaneously, making the duct reversing control of the dry electrostatic spraying booth simple, ingenious, time-saving, labor-saving, and easy to use and install. When cleaning the recycling system, the line can be stopped for a short time to complete the pipe replacement, which significantly improves the spraying efficiency and meets the reversing requirements in actual use.

[0030] In this embodiment of the invention, the second cylinder moving plate 8 has a split, snap-fit ​​structure along the outer end of the branch pipe 3. The upper and lower halves are detachably fixed together by a connecting plate. The sealing ring 5 is snapped and fixed to the outer end of the branch pipe 3 by the upper and lower halves of the second cylinder moving plate 8, facilitating the manufacturing, assembly, and maintenance of the structure, and improving the sealing stability of the connection between the sealing ring 5 and the outer end of the branch pipe 3. In this embodiment, the thickness of the sealing ring 5 is greater than the thickness of the second cylinder moving plate 8, facilitating effective control of the left and right squeezing of the sealing ring 5 by the second cylinder moving plate 8. The outer diameter of the reversing baffle 9 matches the outer diameter of the docking flange and is larger than the inner diameter of the branch pipe 3. This size design simplifies operation and effectively blocks the corresponding port of the branch pipe 3. In this embodiment of the invention, the sealing ring 5 is made of foamed silicone, also known as addition-cure silicone, which is composed of silicone and curing agent in a 1:1 ratio. It is a white, soft, elastic material after vulcanization, further improving the effectiveness of the second cylinder moving plate 8 in controlling the left and right compression of the sealing ring 5. The sealing gasket 6 is made of nitrile rubber, which is a copolymer of acrylonitrile and butadiene monomers. It is mainly produced by low-temperature emulsion polymerization and has excellent oil resistance, high wear resistance, good heat resistance, and strong adhesion. The foamed silicone material of the sealing ring 5 and the nitrile rubber material of the sealing gasket 6 work synergistically to significantly improve the effectiveness of controlling the adhesion force between the sealing ring 5 and the sealing gasket 6.

[0031] In this embodiment of the invention, a lifting ring 10 is provided on the outer edge of the reversing baffle 9, and a set of limiting blocks 13 are provided on the upper edge of the reversing baffle 9 and distributed along the axial direction. The operator only needs to hold and pull the lifting ring 10 on the upper part of the reversing baffle 9 to insert and remove it, which improves the convenience of inserting and removing the reversing baffle 9. At the same time, the setting of the limiting blocks 13 accurately limits the action of the reversing baffle 9 during the insertion process, ensuring the accuracy of its insertion position, and further ensuring the effectiveness of the reversing baffle 9 in blocking the port of the corresponding branch pipe 3.

[0032] In this embodiment of the invention, the cylinder connecting plate assembly is a square frame plate, and each of the four top corners of the first cylinder fixing plate 7 is provided with a horizontally arranged synchronous adjusting cylinder 4. The end of the telescopic rod of the synchronous adjusting cylinder 4 is connected to the second cylinder moving plate 8. Eight adjusting cylinders 4 are installed on the branch pipes 3 on both sides of the tee, all of which are synchronous adjusting cylinders 4 connected to the controller. This adjustment method can simultaneously control the contact force between the elastic telescopic adjusting device of the left and right branch pipes 3 and the sealing ring 5 and sealing gasket 6 between the inner end of the middle connecting pipe. At the same time, the sealing channel between the sealing ring 5 and the sealing gasket 6 is opened, and the reversing baffle 9 is selectively pulled out from one side and then inserted into the other side to block other branch pipes 3. Finally, a one-time stable operation control is achieved, which can realize the selective blocking and installation of the branch pipes 3 on both sides of the tee, saving time and effort and significantly improving its working efficiency.

[0033] In this embodiment of the invention, the bottom of the first cylinder fixing plate 7 is fixedly connected to the three-way base 1 via the three-way fixing plate 12; the bottoms of both the inner and outer ends of the intermediate connecting pipe are also fixedly connected to the three-way base 1 via flange fixing bases. The setting of the three-way base 1 further improves the ease of operation of the air duct reversing device of the present invention for dry electrostatic spraying chamber, facilitates the insertion and extraction of the reversing baffle 9, and also increases the structural stability and durability of the present invention.

[0034] The working principle of this invention is as follows:

[0035] When a reversal is required, the controller controls the telescopic rods of the adjusting cylinders 4 on the first cylinder fixing plates 7 on both sides to retract inward simultaneously. The telescopic rods drive the second cylinder moving plate 8 to retract inward, and at the same time squeeze the sealing ring 5 inward, so that the adhesion between the sealing ring 5 and the sealing gasket 6 is reduced and a gap is created. The reversing baffle 9 is selectively inserted between the sealing ring 5 and the sealing gasket 6 on the side to be closed, so that the corresponding branch pipe 3 is closed.

[0036] Then, the controller controls the telescopic rods of the adjusting cylinders 4 on the first cylinder fixing plates 7 on both sides to extend outward simultaneously. The telescopic rods drive the second cylinder moving plate 8 to move outward, while increasing the outward squeezing force on the sealing ring 5. This increases the adhesion between the sealing ring 5 and the sealing gasket 6, and after the gap is eliminated, the steering adjustment is completed.

[0037] In summary, the duct reversing device for dry electrostatic spraying booths of the present invention has a simple and ingenious structure. It can be configured with two sets of sintered plate recycling systems at the same time, making it convenient to use and install. It allows for short-term line stoppage during recycling system cleaning to complete pipe replacement, saving time and effort, significantly improving spraying efficiency, enhancing the convenience of changing ceramic powder, and meeting the practical needs of switching between large-size pipes and particulate fluids.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A duct reversing device for a dry electrostatic spray booth, characterized by: Includes a three-way base (1), on which a horizontally arranged three-way pipe is fixedly installed; The three-way pipe includes a vertically arranged main pipe (2) connected to the spray booth interface and two horizontally arranged branch pipes (3). The ends of the two branch pipes (3) are connected to the inner end of the intermediate connecting pipe through an elastic telescopic adjustment device. The outer end of the intermediate connecting pipe is connected to the recycling system device. The elastic telescopic adjustment device includes a set of parallel cylinder connecting plate assemblies and an adjusting cylinder (4) connected between the cylinder connecting plate assemblies. The cylinder connecting plate assembly includes a first cylinder fixing plate (7) and a second cylinder moving plate (8) fixedly sleeved on the branch pipe (3). A sealing ring (5) is fixedly sleeved at the outer end of the branch pipe (3). The second cylinder moving plate (8) is snapped onto the sealing ring (5). The inner end of the intermediate connecting pipe is sealed and fitted to the sealing ring (5) through a butt flange and a sealing gasket (6). The adjustment cylinder (4) drives the second cylinder moving plate (8) to move left and right to squeeze the sealing ring (5), thereby controlling the adhesion force between the sealing ring (5) and the sealing gasket (6), and selectively inserting the reversing baffle (9) into it; The second cylinder moving plate (8) has an upper and lower split snap-fit ​​structure along the outer end of the branch pipe (3). The upper half plate and the lower half plate are detachably fixed together by a connecting plate. The sealing ring (5) is snap-fitted and fixed at the outer end of the branch pipe (3) by the upper half plate and the lower half plate of the second cylinder moving plate (8).

2. The duct reversing device for a dry electrostatic spray booth according to claim 1, characterized in that: The thickness of the sealing ring (5) is greater than the thickness of the second cylinder moving plate (8); The outer diameter of the reversing baffle (9) matches the outer diameter of the docking flange and is larger than the inner diameter of the branch pipe (3).

3. A duct reversing device for a dry electrostatic spray booth according to claim 2, characterized in that: The outer edge of the reversing baffle (9) is provided with a lifting ring (10), and a set of limiting blocks (13) are provided on the upper edge of the reversing baffle (9) and distributed along the axial direction.

4. A duct reversing device for a dry electrostatic spray booth according to claim 1, characterized in that: The cylinder connecting plate is assembled into a square frame plate, and the first cylinder fixing plate (7) is provided with a horizontally arranged synchronous adjustment cylinder (4) at each of the four top corners. The end of the telescopic rod of the synchronous adjustment cylinder (4) is connected to the second cylinder moving plate (8). Eight regulating cylinders (4) are installed on the branch pipes (3) on the left and right sides of the three-way pipe. All of them are synchronous regulating cylinders (4) connected to the controller.

5. A duct reversing device for a dry electrostatic spray booth according to claim 4, characterized in that: The bottom of the first cylinder fixing plate (7) is fixedly connected to the tee base (1) through the tee fixing plate (12); the bottom of both the inner and outer ends of the intermediate connecting pipe are also fixedly connected to the tee base (1) through the flange fixing base.

6. A duct reversing device for a dry electrostatic spray booth according to claim 1, characterized in that: The sealing ring (5) is made of foamed silicone, and the sealing gasket (6) is made of nitrile rubber.

7. A duct reversing device for a dry electrostatic spray booth according to claim 1, characterized in that: The outer end of the main pipeline (2) is detachably and fixedly connected to the interface of the spray booth via the spray booth docking flange (11).

8. A method of using a duct reversing device for a dry electrostatic spray booth according to any one of claims 1-7, characterized in that: Specifically, the following steps are included: When a reversal is required, the controller controls the telescopic rods of the adjusting cylinders (4) on the first cylinder fixing plates (7) on both sides to retract inward simultaneously. The telescopic rods drive the second cylinder moving plate (8) to retract inward, and at the same time squeeze the sealing ring (5) inward, so that the adhesion between the sealing ring (5) and the sealing gasket (6) is reduced and a gap is created. The reversing baffle (9) is selectively inserted between the sealing ring (5) and the sealing gasket (6) on the side to be closed, so that the corresponding branch pipe (3) is closed. Then, the controller controls the telescopic rods of the adjusting cylinders (4) on the first cylinder fixing plates (7) on both sides to extend outward simultaneously. The telescopic rods drive the second cylinder moving plate (8) to move outward, while increasing the outward squeezing force on the sealing ring (5). This increases the adhesion force between the sealing ring (5) and the sealing gasket (6) and eliminates gaps, thus completing the steering adjustment.

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