A kind of silicon-carbon rod surface spray coating film pretreatment equipment

Abstract

The utility model provides a kind of silicon-carbon rod surface spraying coating film pretreatment equipment, it is related to inorganic nonmetallic material surface treatment technical field, including bearing table, the bearing table top is equipped with spraying box, spraying box inner top is equipped with spraying assembly, spraying box side is equipped with lift door component, the bearing table top is equipped with moving component and extends to spraying box inside, the moving component top is equipped with positioning assembly, and the positioning assembly is connected with silicon-carbon rod body, and the spraying box other side is equipped with waste gas treatment component;In the utility model, silicon-carbon rod is automatically moved by moving component (screw rod, first driving motor) and is replaced with artificial feeding, reduce worker's labor intensity, while avoiding worker directly facing waste gas, protect health.

Description

Technical Field

[0001] This utility model relates to the field of inorganic non-metallic material surface treatment technology, and in particular to a silicon carbide rod surface spray coating pretreatment equipment. Background Technology

[0002] Silicon carbide rods are widely used in high-temperature equipment (such as wafer annealing furnaces and sintering kilns) in industries such as metallurgy, electronics, and ceramics due to their high temperature resistance and excellent electrical and thermal conductivity. However, they are prone to oxidation and corrosion under prolonged high temperatures, leading to increased resistance and shortened lifespan. The industry commonly uses spray coatings (such as silicon nitride and alumina) to form a protective layer. Therefore, silicon carbide rod coating pretreatment equipment is crucial for its production modification, directly affecting coating quality, production efficiency, and operational safety. Existing pretreatment equipment for coating has significant shortcomings: First, the transfer of silicon carbide rods relies on manual operation, requiring workers to manually feed the rods into the spraying chamber. The weight of the silicon carbide rods themselves significantly increases the labor intensity of workers over long periods. Furthermore, the volatile organic compounds (VOCs) generated during spraying directly contact workers, posing a health hazard. Second, the exhaust gas treatment capacity is insufficient. Most equipment uses only a single-stage filtration system (such as activated carbon adsorption), which cannot simultaneously remove VOCs and fine paint particles, easily leading to excessive emissions. Moreover, filter components are mostly welded or bolted connections, making disassembly and assembly cumbersome and requiring significant downtime for replacement. In addition, problems such as poor adaptability of positioning fixtures and easy missed areas during spraying further contribute to low pretreatment efficiency and insufficient coating pass rates, failing to meet the safety, environmental protection, and high efficiency requirements of industrial production. Therefore, we propose a pretreatment device for silicon carbide rod surface spraying and coating. Utility Model Content

[0003] The purpose of this invention is to provide a pretreatment device for spraying and coating silicon carbide rods to solve the problems in the prior art, such as high labor intensity and harmful exhaust gas to workers due to manual feeding of silicon carbide rods into the box, as well as single exhaust gas filtration, inconvenient disassembly and assembly, unstable positioning of silicon carbide rods, and uneven spraying. The invention aims to reduce the labor intensity of workers, protect their health, improve the exhaust gas treatment effect and maintenance convenience, and at the same time ensure the coating quality of silicon carbide rods.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A pretreatment device for coating the surface of a silicon carbide rod includes a support platform, a spraying box on the top of the support platform, a spraying assembly on the top of the spraying box, a lifting door assembly on one side of the spraying box, a moving assembly on the top of the support platform extending into the spraying box, a positioning assembly on the top of the moving assembly, a silicon carbide rod body connected to the positioning assembly, and a waste gas treatment assembly on the other side of the spraying box.

[0005] As a preferred embodiment of this utility model, the spraying assembly includes multiple fixing rods fixedly connected to the top perimeter of the spraying box, and a spraying base is fixedly connected to the bottom of the fixing rods. The bottom of the spraying base is provided with multiple spray nozzles.

[0006] As a preferred embodiment of this utility model, the top of the spraying base is provided with a feed pipe that extends out of the top of the spraying box and connects to external equipment.

[0007] As a preferred embodiment of this utility model, the lifting door assembly includes a lifting door, and the lifting door is provided with sliding support seats on both the front and back sides. The two ends of the lifting door are slidably connected to the sliding support seats, and a connecting seat is provided between the tops of the sliding support seats.

[0008] As a preferred embodiment of this utility model, the top of the connecting seat is provided with a hydraulic cylinder, the output end of which extends out of the bottom of the connecting seat and connects with the lifting door.

[0009] As a preferred embodiment of this utility model, the movable component includes a fixed base, a sliding groove is provided on the top of the fixed base, a lead screw is provided in the sliding groove, the lead screw is threadedly connected to a placement plate, and a first drive motor is provided on the other side of the support platform, with its output end being connected to the lead screw in a transmission connection.

[0010] As a preferred embodiment of this utility model, the positioning component includes multiple fixed support plates disposed on the back side of the top of the placement plate, multiple lifting brackets disposed on the front side of the top of the placement plate, positioning seats rotatably connected to the front side of each fixed support plate, multiple positioning blocks surrounding the positioning seats, multiple telescopic rods surrounding the interior of each positioning seat housing, springs sleeved on the outer surface of each telescopic rod, the other end of each telescopic rod connected to a positioning block, and a second drive motor disposed on the back side of each positioning seat.

[0011] As a preferred embodiment of this utility model, the exhaust gas treatment component includes a fan base, a fan is provided inside the fan base, a filter tube is threadedly connected to the other side of the fan base, an exhaust pipe is threadedly connected to the other end of the filter tube, and a first filter layer, a second filter layer and a third filter layer are respectively provided inside the filter tube.

[0012] Compared with the prior art, the beneficial effects of this utility model are: In this invention, a moving component (lead screw, first drive motor) automatically transports the silicon carbide rods, replacing manual feeding, reducing labor intensity, and protecting workers' health by preventing them from directly exposing themselves to exhaust fumes. The exhaust gas treatment component utilizes a three-layer filtration system (pre-filter, activated carbon, HEPA filter) to address the issue of single-layer filtration; the threaded connection design facilitates easy assembly and disassembly, ensuring that exhaust gas emissions meet standards. The positioning component (elastic positioning block + lifting frame) works in conjunction with the second drive motor to accommodate silicon carbide rods of different diameters and prevent scratches, rotating the rods to ensure uniform spraying. The lifting door (hydraulic cylinder driven) works with the spray box to improve sealing and reduce exhaust gas leakage. All components work together to improve pretreatment efficiency and coating quality. Attached Figure Description

[0013] Figure 1 A first-view schematic diagram of a silicon carbide rod surface spray coating pretreatment device provided by this utility model; Figure 2 A second-view schematic diagram of a silicon carbide rod surface spray coating pretreatment device provided by this utility model; Figure 3 A schematic cross-sectional view of the positioning component of a silicon carbide rod surface spray coating pretreatment equipment provided by this utility model; Figure 4 A partial cross-sectional structural diagram of a silicon carbide rod surface spray coating pretreatment device provided by this utility model; Figure 5 A cross-sectional schematic diagram of the waste gas treatment component of a silicon carbide rod surface spray coating pretreatment equipment provided by this utility model.

[0014] Legend: 1. Support platform; 2. Spraying box; 3. Spraying assembly; 301. Fixing rod; 302. Spraying base; 303. Spray nozzle; 304. Feed pipe; 4. Lifting door assembly; 401. Lifting door; 402. Sliding support; 403. Connecting seat; 4031. Hydraulic cylinder; 5. Moving assembly; 501. Fixing seat; 502. Slide groove; 503. Lead screw; 504. Placement plate; 505. First drive motor; 6. Positioning component; 601. Fixed support plate; 602. Lifting frame; 603. Positioning seat; 604. Positioning block; 605. Telescopic rod; 606. Spring; 607. Second drive motor; 7. Silicon carbide rod body; 8. Exhaust gas treatment component; 801. Fan base; 802. Fan; 803. Filter tube; 8031. First filter layer; 8032. Second filter layer; 8033. Third filter layer; 804. Exhaust pipe. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0016] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0017] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0019] Example like Figures 1-5 As shown, this utility model provides a technical solution: a silicon carbide rod surface spray coating pretreatment equipment, including a support platform 1, a spray box 2 on the top of the support platform 1, a spraying component 3 on the top of the spray box 2, a lifting door component 4 on one side of the spray box 2, a moving component 5 on the top of the support platform 1 extending into the interior of the spray box 2, a positioning component 6 on the top of the moving component 5, a silicon carbide rod body 7 connected to the positioning component 6, and a waste gas treatment component 8 on the other side of the spray box 2.

[0020] The support platform 1 serves as the basic frame, enabling the integrated installation of various functional components and ensuring the overall stability of the equipment. The spraying box 2 constructs a closed spraying space to prevent the coating material from leaking out and polluting the environment, while also isolating external impurities from interfering with the coating quality. The components form a complete process of "silicon carbide rod positioning → transfer to the spraying area → coating pretreatment → exhaust gas purification", replacing manual step-by-step operations and significantly improving pretreatment efficiency.

[0021] The spraying assembly 3 includes multiple fixing rods 301 fixedly connected to the top perimeter of the spraying box 2. A spraying base 302 is fixedly connected to the bottom of the fixing rods 301, and multiple spray nozzles 303 are provided at the bottom of the spraying base 302. The multiple fixing rods 301 support the spraying base 302 through four-point positioning to prevent the base from shifting due to pressure fluctuations during spraying and to ensure accurate spraying position. The multiple spray nozzles 303 are evenly distributed along the length of the silicon carbide rod, which can simultaneously cover multiple areas on the surface of the silicon carbide rod, shorten the single spraying time, and reduce the output pressure of the paint from a single nozzle by multi-nozzle diversion, thereby reducing the problems of coating sagging and uneven thickness.

[0022] The top of the spray base 302 is equipped with a feed pipe 304 that extends out of the top of the spray box 2 and connects to external equipment. The feed pipe 304 serves as a conveying channel for coating materials and is directly connected to an external paint storage tank or pressure pump to ensure continuous paint supply and avoid spraying interruption.

[0023] The lifting door assembly 4 includes a lifting door 401. The lifting door 401 has sliding support seats 402 on both its front and back sides. The two ends of the lifting door 401 are slidably connected to the sliding support seats 402. A connecting seat 403 is provided between the tops of the sliding support seats 402. The sliding support seats 402 provide a vertical sliding track for the lifting door 401, limiting the lateral displacement of the door and ensuring a smooth and uninterrupted lifting process. The connecting seat 403 connects the two sliding support seats 402 into a whole, enhancing the rigidity of the support structure and preventing door tilting due to deformation of the support seats after long-term use, thus extending the service life of the lifting door assembly 4. A hydraulic cylinder 4031 is provided at the top of the connecting seat 403, with its output end extending out of the bottom of the connecting seat 403 and connecting to the lifting door 401. The hydraulic cylinder 4031 provides stable and sufficient driving force with minimal start-stop impact, preventing door vibration from causing airflow disturbance in the spray box 2 and ensuring coating uniformity.

[0024] The moving component 5 includes a fixed base 501, with a groove 502 on the top of the fixed base 501. A lead screw 503 is installed in the groove 502, and the lead screw 503 is threadedly connected to a placement plate 504. A first drive motor 505 is installed on the other side of the support platform 1, and its output end is connected to the lead screw 503. The fixed base 501 and the groove 502 provide linear motion guidance for the placement plate 504, ensuring that the placement plate 504 (and the positioning component 6) moves along a preset path. The lead screw 503 drives the rotational motion of the first drive motor 505 into the linear motion of the placement plate 504, realizing the transfer of silicon carbide rods from the clamping station outside the spraying box 2 to the spraying station inside the box, replacing manual handling and reducing the labor intensity of operators.

[0025] Positioning assembly 6 includes multiple fixed support plates 601 located on the back side of the top of placement plate 504, and multiple lifting brackets 602 located on the front side of the top of placement plate 504. Positioning seats 603 are rotatably connected to the front of each fixed support plate 601. Multiple positioning blocks 604 are arranged around the inside of each positioning seat 603. Multiple telescopic rods 605 are arranged around the inside of each positioning seat 603 housing. Springs 606 are fitted onto the outer surface of each telescopic rod 605. The other end of each telescopic rod 605 is connected to a positioning block 604. Positioning seat 603… A second drive motor 607 is provided on the back side; a fixed support plate 601 supports the positioning seat 603, and a lifting frame 602 supports the silicon carbide rod from the bottom to prevent the silicon carbide rod from sagging due to its own weight; the positioning block 604 achieves elastic clamping through the telescopic rod 605 and the spring 606, which can adapt to silicon carbide rods of different diameters, and the clamping process will not scratch the surface of the silicon carbide rod; the second drive motor 607 drives the positioning seat 603 to rotate, so that the silicon carbide rod rotates synchronously during spraying, achieving all-round coating and solving the problem of missed spraying on the side of the rod.

[0026] The exhaust gas treatment component 8 includes a fan base 801, a fan 802 housed within the fan base 801, and a filter tube 803 threadedly connected to the other side of the fan base 801. An exhaust pipe 804 is threadedly connected to the other end of the filter tube 803. The filter tube 803 contains a first filter layer 8031, a second filter layer 8032, and a third filter layer 8033. The fan 802 draws volatile paint compounds (such as organic solvents) and fine paint particles from the spray box 2 into the treatment system using negative pressure. The multiple filter layers within the filter tube 803 achieve graded purification (the first filter layer 8031 ​​is a pre-filter to intercept large particles, the second filter layer 8032 is activated carbon to adsorb volatile organic compounds, and the third filter layer 8033 is a HEPA filter to filter fine dust), ensuring that the emitted gas meets environmental standards. The threaded connection between the filter tube 803 and the exhaust pipe 804 facilitates quick disassembly and replacement of the filter layers, reducing maintenance difficulty.

[0027] The working process of this utility model is as follows: When using a silicon carbide rod surface spray coating pretreatment equipment, firstly, before the silicon carbide rod surface spray coating pretreatment operation begins, the operator first clamps the silicon carbide rod body 7 on the moving component 5 placement plate 504 outside the support platform 1, aligns one end of the silicon carbide rod with the positioning seat 603 of the positioning component 6, and the lifting frame 602 supports the silicon carbide rod from the bottom to prevent it from sagging due to its own weight. The telescopic rod 605 inside the positioning seat 603 pushes the positioning block 604 toward the surface of the silicon carbide rod under the elastic force of the spring 606, and achieves adaptive fixing of silicon carbide rods of different diameters through elastic clamping force.

[0028] After ensuring secure clamping, the first drive motor 505 is started. The motor output drives the lead screw 503 in the slide groove 502 of the fixed seat 501 to rotate. The lead screw 503 converts the rotational motion into the linear motion of the placement plate 504 through threaded transmission. The placement plate 504 moves smoothly along the guide slide groove 502, gradually transferring the clamped silicon carbide rod to the spraying station inside the spraying box 2. The entire transfer process does not require manual handling, which reduces labor intensity and ensures positioning accuracy. When the moving component 5 carries the silicon carbide rod to the preset spraying position, the lifting door assembly... Hydraulic cylinder 4031 of 4 is activated, and its output end extends downward, driving the lifting door 401 to descend vertically along the sliding support seats 402 on the front and back until the lifting door 401 is tightly fitted with the body of the spray box 2. The sliding support seat 402 provides stable guidance for the lifting door 401 to avoid lateral deviation, while the connecting seat 403 enhances the rigidity of the support structure to ensure that the lifting door 401 closes smoothly, thereby forming a closed space in the spray box 2, preventing the coating material from leaking out and polluting the environment during the subsequent spraying process, while also isolating external impurities from entering and interfering with the coating quality.

[0029] Subsequently, the second drive motor 607 of the positioning component 6 starts synchronously. The output end of the motor drives the positioning seat 603 to rotate around the fixed support plate 601, which in turn drives the silicon carbide rod body 7 to rotate synchronously at an appropriate speed, laying the foundation for achieving all-round coating without dead angles. At the same time, the fan 802 of the exhaust gas treatment component 8 starts. The fan 802 draws the paint volatiles and fine paint particles that will be generated in the spray box 2 into the fan seat 801 through negative pressure, and then sends them into the threaded filter tube 803. After the first filter layer 8031 ​​(primary filter) intercepts large particulate impurities, the second filter layer 8032 (activated carbon) adsorbs organic volatiles, and the third filter layer 8033 (HEPA filter) filters fine dust, the qualified gas is discharged through the exhaust pipe 804, meeting the environmental protection requirements throughout the process.

[0030] After the silicon carbide rod rotates stably and the exhaust gas treatment system operates normally, the spraying component 3 starts to work. An external paint storage tank or pressurizing pump continuously delivers the coating material to the spraying base 302 through the feed pipe 304 extending to the top of the spraying box 2. Multiple fixing rods 301 form a four-point positioning support for the spraying base 302 from the top and four sides inside the spraying box 2 to prevent the base from shifting due to pressure fluctuations during spraying. The paint in the spraying base 302 is evenly distributed to multiple spray nozzles 303 arranged along the length of the silicon carbide rod at the bottom. After the paint is sprayed out through the spray nozzles 303, it covers the surface of the rotating silicon carbide rod. The multi-nozzle diversion design reduces the paint output pressure of a single nozzle, effectively reducing the problems of coating sagging and uneven thickness. During the spraying process, the moving component 5 can finely adjust the position of the placement plate 504 as needed to ensure that the entire length of the silicon carbide rod can be covered by the paint, further ensuring the consistency of the coating.

[0031] Once the coating on the silicon carbide rod reaches the preset thickness, the paint supply of the spraying component 3 is stopped, and the paint delivery of the feed pipe 304 is cut off. Then, the second drive motor 607 of the positioning component 6 and the fan 802 of the exhaust gas treatment component 8 are turned off in sequence. After the residual exhaust gas in the spraying box 2 is basically purified and the silicon carbide rod stops rotating, the output end of the hydraulic cylinder 4031 of the lifting door component 4 retracts upward, driving the lifting door 401 to rise and open along the sliding support seat 402. Finally, the first drive motor 505 rotates in the opposite direction, driving the lead screw 503 to reverse transmission. The placement plate 504 is guided along the slide groove 502 to move out of the spraying box 2 to the initial clamping position. The operator removes the silicon carbide rod body 7 that has completed the coating pretreatment. Thus, the single silicon carbide rod surface spraying coating pretreatment process is completed. The coordinated cooperation of each component realizes the semi-automation of the entire process from clamping, transfer, sealing, rotation, spraying to exhaust gas purification and unloading, which greatly improves the pretreatment efficiency and ensures the consistency of the coating quality of each silicon carbide rod.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pretreatment device for spray coating on the surface of silicon carbide rods, characterized in that, The system includes a support platform (1), a spray box (2) on top of the support platform (1), a spraying assembly (3) on top inside the spray box (2), a lifting door assembly (4) on one side of the spray box (2), a moving assembly (5) on top of the support platform (1) extending into the spray box (2), a positioning assembly (6) on top of the moving assembly (5), a silicon carbide rod body (7) connected to the positioning assembly (6), and a waste gas treatment assembly (8) on the other side of the spray box (2).

2. The silicon carbide rod surface spray coating pretreatment equipment according to claim 1, characterized in that: The spraying assembly (3) includes multiple fixing rods (301) fixedly connected to the top periphery of the spraying box (2). A spraying base (302) is fixedly connected to the bottom of the fixing rods (301), and multiple spray nozzles (303) are provided at the bottom of the spraying base (302).

3. The silicon carbide rod surface spray coating pretreatment equipment according to claim 2, characterized in that: The top of the spray base (302) is provided with a feed pipe (304) and extends out to the top of the spray box (2) to connect with external equipment.

4. The silicon carbide rod surface spray coating pretreatment equipment according to claim 1, characterized in that: The lifting door assembly (4) includes a lifting door (401), and the lifting door (401) is provided with sliding support seats (402) on both the front and back sides. The two ends of the lifting door (401) are slidably connected to the sliding support seats (402), and the top of the sliding support seats (402) is provided with a connecting seat (403).

5. The silicon carbide rod surface spray coating pretreatment equipment according to claim 4, characterized in that: The top of the connecting seat (403) is provided with a hydraulic cylinder (4031), the output end of which extends out of the bottom of the connecting seat (403) and connects to the lifting door (401).

6. The silicon carbide rod surface spray coating pretreatment equipment according to claim 1, characterized in that: The moving component (5) includes a fixed base (501), the top of the fixed base (501) is provided with a groove (502), a lead screw (503) is provided in the groove (502), the lead screw (503) is threadedly connected to a placement plate (504), and a first drive motor (505) is provided on the other side of the support platform (1), the output end of which is connected to the lead screw (503) for transmission.

7. The silicon carbide rod surface spray coating pretreatment equipment according to claim 1, characterized in that: The positioning component (6) includes multiple fixed support plates (601) on the back side of the top of the placement plate (504), multiple lifting brackets (602) on the front side of the top of the placement plate (504), and positioning seats (603) rotatably connected to the front side of each fixed support plate (601). Multiple positioning blocks (604) are arranged around the inside of the positioning seat (603). Multiple telescopic rods (605) are arranged around the inside of the housing of the positioning seat (603). Springs (606) are sleeved on the outer surface of each telescopic rod (605). The other end of each telescopic rod (605) is connected to the positioning block (604). A second drive motor (607) is provided on the back side of each positioning seat (603).

8. The silicon carbide rod surface spray coating pretreatment equipment according to claim 1, characterized in that: The exhaust gas treatment component (8) includes a fan base (801), a fan (802) is provided inside the fan base (801), a filter tube (803) is threadedly connected to the other side of the fan base (801), an exhaust pipe (804) is threadedly connected to the other end of the filter tube (803), and a first filter layer (8031), a second filter layer (8032) and a third filter layer (8033) are respectively provided inside the filter tube (803).

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