A boron carbide surface coating device

Abstract

The present invention relates to a boron carbide surface coating device; an ultrasonic emitter is fixedly installed on the bottom wall of the multi-functional treatment tank, a hot air pipe is arranged at the center position of the bottom of the multi-functional treatment tank, a waterproof and sealed solenoid valve is arranged inside the top of the hot air pipe, the top of the multi-functional treatment tank is communicated with a three-way solenoid valve arranged outside the comprehensive pretreatment box, two inlet ends of the three-way solenoid valve are respectively communicated with a first liquid supply pipe and a second liquid supply pipe, a limiting bracket is fixedly installed at the opening position of the top of the multi-functional treatment tank, a boron carbide particle loading frame is movably clamped in the limiting bracket, and a boron carbide loading screen bin is installed at the bottom of the boron carbide particle loading frame, which can quickly and efficiently complete the pretreatment and acceleration reaction operations, realize the pressure control in the calcination reaction chamber by adjustable pressure calcination, realize the stable formation of the coating layer on the boron carbide particles, and realize the efficient utilization of heat energy.

Description

Technical Field

[0001] The present invention relates to the field of production and processing of boron carbide, and particularly to a boron carbide surface coating device with high automation and intelligence levels. Background Art

[0002] Boron carbide is a superhard material whose hardness is second only to diamond and cubic boron nitride. Boron carbide products after being calcined with other binding materials are widely used in various industries. However, due to the structural characteristics of boron carbide itself, during the mixing process with other binders, its fusion is not very sufficient, lacking a strong composite holding effect, resulting in the occurrence of the problem of shedding between particles and between the binder. In addition, during the production process of boron carbide products, calcination will also cause boron carbide to oxidize, thereby affecting the quality of the final product and reducing its service life.

[0003] To solve the above problems, methods for coating boron carbide have emerged in the market to improve the oxidation resistance and binding property of boron carbide with binders. The traditional boron carbide coating device first pre-treats boron carbide particles, and then mixes the coating raw materials with the boron carbide raw materials and performs pressure calcination under pressure to achieve the binding and fusion of the coating material with the surface of the boron carbide particles. Finally, after the surface of the produced boron carbide raw material is combined with the coating layer, its oxidation resistance, wear resistance and other properties are improved. However, for tiny particulate boron carbide raw materials, there are problems and defects in material dispersion during the traditional coating process, resulting in low efficiency during the coating process, and ultimately strict process control is required for coating.

[0004] In this regard, some methods such as liquid precipitation coating have emerged currently. These methods use coating liquids to grind boron carbide particles, and then use heating, mixing and stirring and other methods to achieve the coating process after chemical reaction. However, during the overall operation of the equipment, there are defects such as low transfer efficiency and low coating rate of the final product. Whether using heat treatment or liquid chemical reaction methods, traditional methods all have some defects, including low overall coherence, reduced working and operating efficiency, low integration level, high energy consumption or low transfer, mechanization and automation levels.

[0005] Therefore, the present invention provides a boron carbide surface coating device with a simple structure, which improves the bonding degree and composite degree during the raw material production process, has a high overall intelligence level, high equipment production coherence, simultaneously improves the oxidation resistance of the particulate raw materials themselves, improves the final quality of the product, prevents the corrosion of the binder and boron carbide, improves the oxidation resistance of boron carbide particles during their own calcination process, has high finished product quality, realizes waste heat utilization and reduces energy consumption, and has a broad market prospect. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention provides a boron carbide surface coating device with a simple structure, which improves the degree of bonding and compounding during the raw material production process, has a high overall degree of intelligence, a high production coherence of the equipment, and at the same time improves the antioxidant property of the granular raw material itself, improves the final quality of the product, prevents the corrosion of the binder and boron carbide, improves the antioxidant property of the boron carbide particles during their own calcination process, has a high finished product quality, realizes waste heat utilization, and reduces energy consumption, so as to overcome the defects in the prior art.

[0007] The technical solution of the present invention is realized as follows: A boron carbide surface coating device includes a comprehensive pretreatment tank, and a calcination reaction chamber cooperating with the comprehensive pretreatment tank. A multifunctional treatment pool is arranged in the comprehensive pretreatment tank. Heating coils are fixedly installed on the inner wall of the multifunctional treatment pool. Ultrasonic transmitters are fixedly installed on the bottom wall of the multifunctional treatment pool. A hot air pipe is arranged at the center position of the bottom of the multifunctional treatment pool. A waterproof and sealed solenoid valve is arranged on the inner side of the top of the hot air pipe. The top of the multifunctional treatment pool is communicated with a three-way solenoid valve arranged outside the comprehensive pretreatment tank. The two inlet ends of the three-way solenoid valve are respectively communicated with a first liquid supply pipe and a second liquid supply pipe. A limit bracket is fixedly installed at the opening position of the top of the multifunctional treatment pool. A boron carbide particle loading frame is movably clamped in the limit bracket. A boron carbide loading screen bin is installed at the bottom of the boron carbide particle loading frame.

[0008] Furthermore, a pressurized opening cover body is arranged at the top of the calcination reaction chamber. A bottom support isolation plate cooperating with the bottom of the boron carbide loading screen bin is arranged at the bottom of the inner cavity of the calcination reaction chamber. A high-temperature calcination heat supply pipe is installed below the bottom support isolation plate. An air extraction pipe and a monitoring control pipe are arranged at the top of the inner cavity of the calcination reaction chamber. At least one air extraction and discharge control valve is arranged on the air extraction pipe. A pressure gauge is installed on the monitoring control pipe. The other ends of the monitoring control pipe and the air extraction pipe are communicated with a gas pressure stabilizing controller. The hot air pipe below the waterproof and sealed solenoid valve is communicated with the air extraction and discharge control valve through a heat preservation air supply pipe equipped with a blower.

[0009] Furthermore, the comprehensive pretreatment tank is a square structure with an opening at the top. A sewage discharge pipe with a valve is arranged at the bottom of the multifunctional treatment pool. The heating coils are connected to an electric heater arranged at the bottom of the comprehensive pretreatment tank. The ultrasonic transmitters are connected to an ultrasonic generator arranged at the bottom of the comprehensive pretreatment tank. The hot air pipe is communicated with a hot air blower arranged at the bottom of the comprehensive pretreatment tank.

[0010] Further, the limiting bracket is of a square frame structure, the inner diameter of the limiting bracket is matched with the outer diameter of the boron carbide particle loading frame, a hanging ring is arranged at the top of the boron carbide loading frame, the boron carbide loading screen bin is of a square screen body structure, the top of the boron carbide loading screen bin is fixedly connected with the bottom edge position of the boron carbide loading frame, the inner diameter of the boron carbide loading frame is matched with the inner diameter of the boron carbide loading screen bin, and the boron carbide loading screen bin is a square bin body structure with a square cross-section.

[0011] Further, top support sliding rods are arranged at the tops of the comprehensive pretreatment box and the calcination reaction bin, and a self-running electric hoist matched with the boron carbide loading frame is sleeved on the top support sliding rods.

[0012] Further, the inner cavity of the calcination reaction bin is of a square bin body structure with a square cross-section, the side length of the inner cavity of the calcination reaction bin is not less than the side length of the boron carbide loading screen bin, the depth of the calcination reaction bin is not less than the height of the boron carbide loading screen bin, and an anti-overflow cover body is movably installed at the top of the boron carbide loading frame.

[0013] Further, the high-temperature calcination heating pipe is an S-shaped coil pipe, the heating coil pipe is fixedly wound on the inner wall of the multifunctional treatment pool in a square structure from top to bottom, and the electric heater is respectively connected with the heating coil pipe and the high-temperature calcination heating pipe through a thermoelectric shunt controller.

[0014] Further, a gas shunt controller is arranged below the hot air pipe, and the heat preservation air supply pipe is communicated with the gas shunt controller.

[0015] The present invention has the following positive effects:

[0016] 1. The present invention uses the electric hoist in the upper part to carry out the transfer operation, and in the multifunctional treatment pool and the calcination reaction bin, the pretreatment cleaning, suspension reaction treatment, drying and calcination stabilization operations of boron carbide particles are carried out through fully automatic and intelligent control. The overall coherence is strong, the treatment is efficient and convenient, large-scale production can be realized, and at the same time, the efficiency is high, and the coating treatment is integrated.

[0017] 2. The present invention uses the multifunctional treatment pool to realize the pretreatment cleaning operation, the purified water cleaning operation and the suspension reaction operation of the acid-base neutralization degree. At the same time, the ultrasonic emitter and the heating coil pipe are used to cooperate with the pretreatment and the suspension reaction operation, and the pretreatment and the acceleration reaction operation can be completed quickly and efficiently, ensuring the formation of a stable coating reaction on the surface of boron carbide particles, and the overall is efficient and convenient.

[0018] 3. The present invention collects the waste heat in the calcination reaction chamber by using a heat-insulating air supply pipe, introduces it into the hot air pipe, and performs a drying operation for the pre-treated boron carbide particles to utilize the waste heat. After the suspension reaction treatment, the drying operation can be quickly carried out. At the same time, during the calcination operation, adjustable pressure calcination is used to control the pressure in the calcination reaction chamber, and a passage for waste heat recovery and utilization is provided to achieve the stable formation of the coating layer on the boron carbide particles and the efficient utilization of thermal energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the front view structural schematic diagram of the present invention.

[0020] Figure 2 is the top view structural schematic diagram of the present invention.

[0021] Figure 3 is the internal structural schematic diagram of the present invention.

[0022] Figure 4 is one of the schematic diagrams of the usage state structure of the present invention.

[0023] Figure 5 is the second schematic diagram of the usage state structure of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0025] In the following description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. The term "connection" only indicates the connection between devices and has no special meaning.

[0026] Specific embodiments are referred to Figure 1 、 2As shown in Figures 3, 4 and 5, a boron carbide surface coating device includes a comprehensive pretreatment tank 1 and a calcination reaction chamber 16 cooperating with the comprehensive pretreatment tank 1. A multifunctional treatment pool 26 is arranged in the comprehensive pretreatment tank 1. A heating coil 27 is fixedly installed on the inner wall of the multifunctional treatment pool 26. An ultrasonic transmitter 29 is fixedly installed on the bottom wall of the multifunctional treatment pool 26. A hot air pipe 39 is arranged at the center of the bottom of the multifunctional treatment pool 26. A waterproof sealing solenoid valve 38 is arranged on the inner side of the top of the hot air pipe 39. The top of the multifunctional treatment pool 26 is communicated with a three-way solenoid valve 34 arranged outside the comprehensive pretreatment tank 1. The two inlet ends of the three-way solenoid valve 34 are respectively communicated with a first liquid supply pipe 33 and a second liquid supply pipe 36. A limiting bracket 2 is fixedly installed at the opening position of the top of the multifunctional treatment pool 26. A boron carbide particle loading frame 6 is movably clamped in the limiting bracket 2. A boron carbide loading screen bin 25 is installed at the bottom of the boron carbide particle loading frame 6. A pressurized opening cover 17 is arranged at the top of the calcination reaction chamber 16. A bottom support isolation plate 43 matching the bottom of the boron carbide loading screen bin 25 is arranged at the bottom of the inner cavity of the calcination reaction chamber 16. A high-temperature calcination heating pipe 42 is installed below the bottom support isolation plate 43. An air extraction pipe 18 and a monitoring control pipe 22 are arranged at the top of the inner cavity of the calcination reaction chamber 16. At least one air extraction and discharge control valve 20 is arranged on the air extraction pipe 18. A pressure gauge 19 is installed on the monitoring control pipe 22. The other ends of the monitoring control pipe 22 and the air extraction pipe 18 are communicated with a gas pressure stabilizer 21. The hot air pipe 39 below the waterproof sealing solenoid valve 38 is communicated with the air extraction and discharge control valve 20 through a heat preservation air supply pipe 7 equipped with a blower 61.

[0027] The comprehensive pretreatment tank 1 is a square structure with an opening at the top. A drain pipe 31 with a valve is arranged at the bottom of the multifunctional treatment pool 26. The heating coil 27 is connected to an electric heater 28 arranged at the bottom of the comprehensive pretreatment tank 1. The ultrasonic transmitter 29 is connected to an ultrasonic generator 30 arranged at the bottom of the comprehensive pretreatment tank 1. The hot air pipe 39 is communicated with a hot air blower 41 arranged at the bottom of the comprehensive pretreatment tank 1. The limiting bracket 2 is a square frame structure. The inner diameter of the limiting bracket 2 matches the outer diameter of the boron carbide particle loading frame 6. A hanging ring 4 is arranged at the top of the boron carbide loading frame 6. The boron carbide loading screen bin 25 is a square screen body structure. The top of the boron carbide loading screen bin 25 is fixedly connected to the bottom edge position of the boron carbide loading frame 6. The inner diameter of the boron carbide loading frame 6 matches the inner diameter of the boron carbide loading screen bin 25. The boron carbide loading screen bin 25 is a square bin body structure with a square cross-section.

[0028] A top support sliding rod 24 is provided at the top of the comprehensive pretreatment box 1 and the calcination reaction chamber 16. An automatic running electric hoist 23 that cooperates with the boron carbide loading frame 6 is sleeved on the top support sliding rod 24. The inner cavity of the calcination reaction chamber 16 is a square chamber structure with a square cross-section. The side length of the inner cavity of the calcination reaction chamber 16 is not less than the side length of the boron carbide loading screen bin 25, and the depth of the calcination reaction chamber 16 is not less than the height of the boron carbide loading screen bin 25. An anti-overflow cover is movably installed on the top of the boron carbide loading frame 6.

[0029] The high-temperature calcination heating pipe 42 is an S-shaped coil pipe. The heating coil 27 is fixedly coiled downwards in a square structure on the inner wall of the multifunctional treatment tank 26. The electric heater 28 is connected to the heating coil 27 and the high-temperature calcination heating pipe 42 respectively through a thermoelectric shunt controller. A gas shunt controller 40 is provided below the hot air pipe 39. The heat preservation air supply pipe 7 is communicated with the gas shunt controller 40.

[0030] When the present invention is in operation, boron carbide particles are loaded into the boron carbide loading screen bin 25. The mesh screen gap of the boron carbide loading screen bin 25 is not greater than the particle size of the boron carbide particles. The top support sliding rod 24 and the electric hoist 23 installed thereon are used to transfer the boron carbide loading screen bin 25 between the multifunctional treatment tank 26 and the calcination reaction chamber 16; the boron carbide loading frame 6 is transferred to the limit bracket 2 for support and clamping, and then the three-way solenoid valve 34 is opened. The treatment liquid is transported into the multifunctional treatment tank 26 through the first liquid supply pipe 33. The ultrasonic generator 30 is turned on, and the ultrasonic emitter 29 is used to perform surface pretreatment cleaning operations on the boron carbide particles in the boron carbide loading screen bin 25.

[0031] When the surface pretreatment cleaning operation of the boron carbide is completed, the drain pipe 31 is opened, and the waste treatment liquid in the multifunctional treatment tank 26 is discharged. Then the drain pipe 31 is closed, and then clean water is added to the multifunctional treatment tank 26 to perform at least one clean water cleaning operation on the pretreated boron carbide particles. After the cleaning is completed, the waste water is discharged; another passage of the three-way solenoid valve 34 is opened, and the suspension liquid is transported into the multifunctional treatment tank 26 through the second liquid supply pipe 36. The electric heater 28 is turned on to heat the heating coil 27 to a preset temperature. The boron carbide particles in the boron carbide loading screen bin 25 are uniformly mixed under high temperature control in the suspension liquid.

[0032] When the treatment of the boron carbide particles and the suspension liquid is completed, the waste liquid is discharged through the drain pipe 31. The waterproof seal solenoid valve 38 is opened, and the hot air blower 41 is used to introduce hot air into the hot air pipe 39 through the gas shunt controller 40. The air volume and the hot air temperature are controlled. The hot air is discharged from the top of the hot air pipe 39 to perform air drying operations on the boron carbide particles in the pretreated boron carbide loading screen bin 25 until all the boron carbide particles are dried.

[0033] After the drying operation is completed, use the electric hoist 23 to transfer the boron carbide loading frame 6 loaded with dried boron carbide particles and the boron carbide loading screen bin 25 to the bottom support isolation plate 43 provided at the bottom of the inner cavity of the calcination reaction chamber 16. Turn on the high-temperature calcination heating pipe 42 through the electric shunt controller. At the same time, use the gas pressure stabilizing controller 21 to perform pressure control operation on the inner cavity of the calcination reaction chamber 16. Use the method of pressure calcination to perform high-temperature calcination on the suspension adsorbed on the surface of the dried boron carbide particles, and a coating film is formed on the surface of the boron carbide particles after high-temperature calcination.

[0034] When the present invention is in operation, the pretreatment liquid is a mixed liquid of sodium hydroxide and sodium carbonate. When performing the pretreatment operation, the electric heater 28 can be turned on to heat up the pretreatment liquid to improve the cleaning speed. The temperature is controlled below 90 degrees Celsius, and the overall pretreatment cleaning operation time is 30 minutes.

[0035] When the present invention is in operation, the suspension is an important liquid for forming a coating film by reacting on the surface of boron carbide particles. It is a liquid formed by mixing distilled water with ferric chloride, urea, and SDS. When boron carbide particles are involved in the suspension, an effective reaction solution is formed. A coating film is gradually formed on the outside of the boron carbide particles and the suspension under the action of heating and mixing treatment. The calcination reaction temperature in the calcination reaction chamber 16 of the present invention is 1000 degrees Celsius, and the overall calcination time is controlled within two hours.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A boron carbide surface coating device, comprising a comprehensive pretreatment box and a vacuum calcination reaction chamber that cooperates with the comprehensive pretreatment box, characterized in that: A multi-functional treatment pool is arranged inside the comprehensive pretreatment tank. A heating coil is fixedly installed on the inner wall of the multi-functional treatment pool. An ultrasonic emitter is fixedly installed on the bottom wall of the multi-functional treatment pool. A hot air pipe is arranged at the center position of the bottom of the multi-functional treatment pool. A waterproof and sealed solenoid valve is arranged on the inner side of the top of the hot air pipe. The top of the multi-functional treatment pool is communicated with a three-way solenoid valve arranged outside the comprehensive pretreatment tank. The two inlet ends of the three-way solenoid valve are respectively communicated with a first liquid supply pipe and a second liquid supply pipe. A limit bracket is fixedly installed at the opening position of the top of the multi-functional treatment pool. A boron carbide particle loading frame is movably clamped inside the limit bracket. A boron carbide loading screen bin is installed at the bottom of the boron carbide particle loading frame; A pressure-opening cover body is arranged at the top of the vacuum calcination reaction chamber. A bottom support isolation plate matched with the bottom of the boron carbide loading screen bin is arranged at the bottom of the inner cavity of the vacuum calcination reaction chamber. A high-temperature calcination heating pipe is installed below the bottom support isolation plate. An air extraction pipe and a monitoring and control pipeline are arranged at the top of the inner cavity of the vacuum calcination reaction chamber. At least one air extraction and discharge control valve is arranged on the air extraction pipe. A pressure gauge is installed on the monitoring and control pipeline. The other ends of the monitoring and control pipeline and the air extraction pipe are communicated with a gas pressure stabilizer controller. The hot air pipe below the waterproof and sealed solenoid valve is communicated with the air extraction and discharge control valve through a heat-insulated air supply pipe equipped with a blower.

2. The boron carbide surface coating device according to claim 1, wherein: The comprehensive pretreatment tank is a square structure with an opening at the top. A sewage pipe with a valve is arranged at the bottom of the multi-functional treatment pool. The heating coil is connected to an electric heater arranged at the bottom of the comprehensive pretreatment tank. The ultrasonic emitter is connected to an ultrasonic generator arranged at the bottom of the comprehensive pretreatment tank. The hot air pipe is communicated with a hot air blower arranged at the bottom of the comprehensive pretreatment tank.

3. The boron carbide surface coating device according to claim 1, characterized in that: The limit bracket is a square frame structure. The inner diameter of the limit bracket matches the outer diameter of the boron carbide particle loading frame. A hanging ring is arranged at the top of the boron carbide loading frame. The boron carbide loading screen bin is a square screen body structure. The top of the boron carbide loading screen bin is fixedly connected to the bottom edge position of the boron carbide loading frame. The inner diameter of the boron carbide loading frame matches the inner diameter of the boron carbide loading screen bin. The boron carbide loading screen bin is a square bin body structure with a square cross-section.

4. The boron carbide surface coating device according to claim 1, characterized in that: Top support sliding rods are arranged at the tops of the comprehensive pretreatment tank and the vacuum calcination reaction chamber. A self-running electric hoist matched with the boron carbide loading frame is sleeved on the top support sliding rods.

5. The boron carbide surface coating device according to claim 1, characterized in that: The inner cavity of the vacuum calcination reaction chamber is a square bin body structure with a square cross-section. The side length of the inner cavity of the vacuum calcination reaction chamber is not less than the side length of the boron carbide loading screen bin. The depth of the vacuum calcination reaction chamber is not less than the height of the boron carbide loading screen bin. An anti-overflow cover body is movably installed at the top of the boron carbide particle loading frame.

6. The boron carbide surface coating device according to claim 1, wherein: The high-temperature calcination heating pipe is an S-shaped coil. The heating coil is fixedly wound in a square structure from top to bottom on the inner wall of the multi-functional treatment pool. The electric heater is respectively connected to the heating coil and the high-temperature calcination heating pipe through a heat diversion controller.

7. The boron carbide surface coating device according to claim 1, wherein: A gas diversion controller is arranged below the hot air pipe. The heat-insulated air supply pipe is communicated with the gas diversion controller.

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