Novel sealing device for detecting oxygen content of titanium alloy powder

Abstract

The utility model discloses a novel sealing device for titanium alloy powder oxygen content detection, which comprises a support frame and a vacuum chamber, one side of the bottom of the support frame is provided with a first motor, one side of the first motor is provided with a rotary granulation mechanism, one side of the rotary granulation mechanism is provided with a three-way pipe, one side of the three-way pipe is provided with a titaniferous solution atomizing mechanism, and the other side of the three-way pipe is provided with a second motor. A vacuum chamber is arranged above the titaniferous solution atomizing mechanism, a heating coil is arranged on the lower side of the inner wall of the vacuum chamber, a heat conducting plate is arranged above the heating coil, a stirring mechanism is arranged at the center of the top of the heat conducting plate, a second vacuum pump is arranged on one side of the stirring mechanism, and a feeding pipe is arranged on the other side of the stirring mechanism; a mechanical valve is arranged on one side of the feeding pipe, a large amount of air is prevented from entering the vacuum chamber while a titanium rod is placed in the vacuum chamber through the double-layer sealed feeding port structure, the purity of the titanium rod material inside the vacuum chamber is guaranteed, and the production precision of products is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of sealing device more specifically, the utility model relates to a novel sealing device for titanium alloy powder oxygen content detection. BACKGROUND

[0002] The preparation process of the existing titanium and titanium alloy powder mainly includes: mechanical crushing method, chemical reaction method and atomization method, wherein the powder obtained by the mechanical crushing method is irregular in shape and has high oxygen content, which does not meet the requirements; and the chemical reaction method is only suitable for the preparation of pure titanium powder, and the prepared powder has high chlorine residue and insufficient purity; therefore, the preparation of spherical titanium and titanium alloy powder currently mainly adopts the atomization method.

[0003] After searching, the existing patent (publication number: CN110871274A) discloses a titanium alloy powder processing equipment and preparation process, which comprises a rack body, a feeding device, a high-frequency generator, a mounting plate, an electromagnetic heating coil, a titanium liquid atomization mechanism, a rotary granulation mechanism, a speed regulator and a power distribution cabinet; the setting of the high-frequency generator control electromagnetic heating coil avoids the pollution of the existing crucible to the titanium and titanium alloy liquid, which seriously affects the problem of laser additive manufacturing; the setting of the titanium liquid atomization mechanism avoids the crucible in the atomization process, and since melting and atomization are carried out at the same time, the process flow is greatly shortened; the setting of the rotary granulation mechanism drives the rotating disc to rotate by the rotating motor, and under the action of centrifugal force, the atomized titanium liquid particles are thrown out by the rotating disc, thereby forming metal liquid drops, and the metal liquid drops are further spheroidized and condensed to obtain the required powder, which has the advantages of short production cycle, high spheroidization rate and low cost. The inventor found the following problems in the process of realizing the utility model:

[0004] The existing device lacks a corresponding sealing mechanism at the feeding port of the titanium rod, which leads to the mixing of air during the feeding process, affecting the quality of titanium, and the internal heating coil is not uniform in heating the titanium rod, and the melting efficiency is low. The participation of oxygen in the air in each link has no corresponding prevention, which makes the waste rate of the titanium alloy powder produced high, increases the production cost, and at the same time reduces the production efficiency; therefore, a novel sealing device for titanium alloy powder oxygen content detection is proposed to solve the above problems. SUMMARY

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a novel sealing device for titanium alloy powder oxygen content detection to solve the problems in the above background art.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: A novel sealing device for titanium alloy powder oxygen content detection, including support frame and vacuum chamber, the bottom side of support frame is provided with no.

[0007] Preferably, the inside of the rotary granulating mechanism, titanium liquid atomization mechanism and stirring mechanism is provided with an oxygen detector.

[0008] Preferably, the rotary granulating mechanism includes a third motor, a shell, a rotary disc and a discharge port, the side of the third motor is provided with a shell, the inside center of the shell is provided with a rotary disc, the two sides of the rotary disc are provided with spherical holes, the side of the rotary disc is connected with the three-way pipe, and the outer wall of the shell is provided with a discharge port.

[0009] Preferably, the shell is connected to the first vacuum pump through the discharge port, so that the titanium alloy powder is discharged from the first vacuum pump.

[0010] Preferably, the titanium liquid atomization mechanism includes a sealing layer, a liquid collecting tank, a negative pressure fan and an inert gas tank, the inside of the sealing layer is provided with a liquid collecting tank, the inside of the liquid collecting tank is connected with the three-way pipe, the side of the liquid collecting tank is connected with a negative pressure fan through the three-way pipe, and the side of the negative pressure fan is provided with an inert gas tank.

[0011] Preferably, the stirring mechanism includes stirring blades, a transmission rod and a rotating shaft, the center of the stirring blades is provided with a transmission rod, one end of the transmission rod is provided with a rotating shaft, and the transmission rod is connected to the second motor through the rotating shaft.

[0012] Preferably, the second motor, the feeding pipe and the second vacuum pump are provided with sealing rings at the connection with the vacuum chamber.

[0013] Preferably, the wrapping layer is tightly attached to the outer wall of the feeding pipe, and the top of the wrapping layer is attached to the mechanical valve, and the side of the mechanical valve is provided with a handle.

[0014] The technical effects and advantages of the present application are as follows:

[0015] 1. Compared with the prior art, the novel sealing device for titanium alloy powder oxygen content detection effectively isolates oxygen and other impurities in the air through the double-layer sealing design of the feed inlet, avoids the pollution of the vacuum chamber of molten titanium at high temperature, ensures the purity of the titanium rod material, promotes the uniform mixing of the material through the setting of the stirring rod in the vacuum chamber, and realizes rapid melting with the aid of the heating wire, thereby improving the melting efficiency and ensuring the uniformity of the chemical composition, improving the product quality and improving the production efficiency.

[0016] 2. Compared with the prior art, the novel sealing device for titanium alloy powder oxygen content detection is configured with a vacuum pump on one side of the stirring cavity, so that the stirring cavity becomes a vacuum chamber, effectively avoiding the reaction of oxygen and impurities in the air with molten titanium, ensuring the purity of the titanium alloy powder, and setting a sealing ring on the contact surface of the vacuum pump and the feed pipe and the vacuum chamber, further strengthening the airtightness of the system, preventing external gas from penetrating to affect the vacuum effect, using the negative pressure generated by the vacuum pump to discharge the titanium alloy powder from the discharge port of the rotary granulating mechanism, not only improving the discharging efficiency, but also reducing the residue and waste of the material in the equipment, and the processing in the vacuum environment can reduce energy consumption, because no additional energy is needed to resist atmospheric pressure or handle gas impurities. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0018] Figure 2 It is a schematic diagram of the local structure of the rotary granulating mechanism and the first vacuum pump of the present application.

[0019] Figure 3 It is a schematic diagram of the local structure of the titanium liquid atomizing mechanism and the tee pipe of the present application.

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the vacuum chamber and the stirring mechanism of the present application.

[0021] The reference signs are: 1, support frame; 2, vacuum chamber; 3, first motor; 4, rotary granulating mechanism; 5, first vacuum pump; 6, tee pipe; 7, titanium liquid atomizing mechanism; 8, heating coil; 9, heat conduction plate; 10, stirring mechanism; 11, second motor; 12, second vacuum pump; 13, feed pipe; 14, wrapping layer; 15, mechanical valve; 16, oxygen detector; 17, third motor; 18, shell; 19, rotating disc; 20, discharge port; 21, sealing layer; 22, liquid collecting tank; 23, negative pressure fan; 24, inert gas tank; 25, stirring blade; 26, transmission rod; 27, rotating shaft; 28, sealing ring; 29, handle. DETAILED DESCRIPTION

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0023] As attached Figures 1 to 4 The novel sealing device for detecting the oxygen content of titanium alloy powder shown includes a support frame 1 and a vacuum chamber 2. The support frame 1 is made of metal and serves as a support. A motor 3 is installed on one side of the bottom of the support frame 1, providing power to the components of the device. A rotary granulation mechanism 4 is installed on one side of the motor 3, and a vacuum pump 5 is installed below the rotary granulation mechanism 4. The vacuum pump 5 is a rotary vane vacuum pump, which uses novel self-lubricating materials such as carbon impregnated alloy and carbon fiber reinforced plastic to improve the pump's wear resistance and reduce temperature rise. The rotary granulation mechanism 4 uses the centrifugal force of rotation to form small spherical beads of titanium liquid, which are discharged from holes on both sides and then discharged through the discharge port 20. The vacuum pump 5 installed at the discharge port 20 can quickly remove the gas generated during the granulation process, thereby accelerating the granulation speed and improving production continuity, reducing the material residence time, and avoiding overheating or degradation. This is crucial for maintaining the quality and performance of the product. At the same time, granulation under vacuum conditions can avoid oxidation and hydrolysis reactions at high temperatures, thus ensuring that the chemical and physical properties of the final product meet the expected standards.

[0024] A three-way pipe 6 is provided on one side of the rotary granulation mechanism 4. The design of the three-way pipe 6 allows argon gas to flow in from one side. This structural design not only ensures uniform mixing of atomized gases, but also allows control of the atomization process by adjusting the gas flow rate and ratio. A titanium liquid atomization mechanism 7 is provided on one side of the three-way pipe 6. A vacuum chamber 2 is provided above the titanium liquid atomization mechanism 7. A heating coil 8 is provided on the lower side of the inner wall of the vacuum chamber 2. Several groups of heating coils 8 are provided, and each group of heating coils 8 is evenly arranged along the vertical direction of the vacuum chamber 2. The heating coils 8 use a high-frequency induction crucibleless melting method. Titanium wire is used, which can reduce the introduction of impurities. By optimizing the current frequency and wire feeding speed, the melting efficiency and quality can be effectively controlled. The molten titanium liquid enters the titanium liquid atomization mechanism 7 for atomization. A heat-conducting plate 9 is set above the heating coil 8. The heat-conducting plate 9 is made of a material with high thermal conductivity, such as copper or silver, to improve the heat conduction efficiency. The presence of the heat-conducting plate 9 significantly improves the heat transfer speed from the heating coil 8 to the stirring mechanism 10 and reduces energy loss. Through the heat-uniform heating effect of the heat-conducting plate 9, the material around the stirring mechanism 10 is heated more evenly, improving product quality.

[0025] A stirring mechanism 10 is arranged at the top center of the heat conduction plate 9. The stirring mechanism 10 can ensure that the materials are fully mixed and stirred under vacuum conditions, thereby improving the uniformity of the mixture. The stirring mechanism 10 can also promote uniform temperature distribution and avoid local hot spots or cold spots. A second motor 11 is arranged above the stirring mechanism 10. The second motor 11 can drive the stirring mechanism 10 to operate. A second vacuum pump 12 is arranged on one side of the stirring mechanism 10. The second vacuum pump 12 maintains a vacuum state in the vacuum chamber 2, so that the titanium rods inside will not be contaminated during the heating process, thereby improving the purity of the raw materials. A feeding pipe 13 is arranged on the other side of the stirring mechanism 10. The outer wall of the feeding pipe 13 is provided with a wrapping layer 14. A mechanical valve 15 is arranged on one side of the feeding pipe 13. The wrapping layer 14 is made of a material with high temperature resistance, wear resistance and good insulation performance, such as high-silicon glass fiber. The mechanical valve 15 is designed for high temperature and high pressure, which can quickly respond and has good corrosion resistance and wear resistance. This design provides good sealing performance to prevent a large amount of air from entering the vacuum chamber 2 during the feeding process, thereby affecting the purity of the materials. Embodiment

[0026] Based on the embodiment 1, the scheme in embodiment 1 is further refined in combination with the specific working mode as follows: Figures 1 to 4 as shown in the following description:

[0027] As a preferred embodiment, the inside of the rotary granulation mechanism 4, the titanium liquid atomization mechanism 7 and the stirring mechanism 10 are all provided with an oxygen detector 16. Further, the model of the oxygen detector is FIX800-O2, which can monitor the oxygen content in each chamber in real time to control the power of each vacuum pump and ensure the efficiency of production.

[0028] As a preferred embodiment, the rotary granulation mechanism 4 includes a third motor 17, a shell 18, a rotating disc 19 and a discharge port 20. The third motor 17 is provided with a shell 18 on one side. The inside of the shell 18 is provided with a rotating disc 19 at the center. The rotating disc 19 is provided with spherical holes on both sides. The rotating disc 19 is connected with the three-way pipe 6 on one side. The outer wall of the shell 18 is provided with a discharge port 20 on one side. Further, the third motor 17 enables the rotating disc 19 to move in a circular motion in the shell 18, so that the titanium liquid passes through the spherical holes of the rotating disc 19 under the action of centrifugal force and is cooled and formed into titanium alloy powder particles at the same time. This design can ensure the stability of the shape of the titanium alloy powder.

[0029] As a preferred embodiment, the shell 18 is connected to the first vacuum pump 5 through the discharge port 20, so that the titanium alloy powder is discharged from the first vacuum pump 5. Further, by arranging the first vacuum pump 5 at the discharge port 20, the gas generated during the granulation process can be quickly removed, thereby accelerating the granulation speed and improving the production continuity. At the same time, the granulation is carried out under vacuum conditions, which can avoid oxidation and hydrolysis reactions at high temperatures, thereby ensuring that the chemical and physical properties of the final product meet the expected standards.

[0030] As a preferred embodiment, the titanium liquid atomization mechanism 7 includes a sealing layer 21, a liquid collecting tank 22, a negative pressure fan 23 and an inert gas tank 24. The inside of the sealing layer 21 is provided with the liquid collecting tank 22, the inside of the liquid collecting tank 22 is connected to the three-way pipe 6, the liquid collecting tank 22 is connected to the negative pressure fan 23 through the three-way pipe 6, the negative pressure fan 23 is provided with the inert gas tank 24 on one side. Further, the sealing layer 21 is made of flexible material to prevent air from entering from the gap. The liquid collecting tank 22 is made of high thermal conductivity material, and the inner wall should be smooth to ensure the smoothness of the melted titanium liquid. After the titanium liquid enters the three-way pipe 6, it is pushed into the rotary granulation mechanism 4 by the argon gas in the inert gas tank 24 and the gas of the negative pressure fan 23, ensuring that there is no air involved in the process and ensuring the purity of the raw materials.

[0031] As a preferred embodiment, the stirring mechanism 10 includes stirring blades 25, a transmission rod 26 and a rotating shaft 27. The center of the stirring blade 25 is provided with the transmission rod 26, one end of the transmission rod 26 is provided with the rotating shaft 27, and the transmission rod 26 is connected to the second motor 11 through the rotating shaft 27. Further, the stirring blade 25 is usually made of high corrosion-resistant material, such as stainless steel or special alloy. In order to improve the corrosion resistance of the stirring blade 25, its outer surface is usually coated with a layer of corrosion-resistant layer, such as hot sprayed ceramic material, to protect the blade body from corrosion. The efficient stirring generated by the cooperation of the rotating shaft 27 and the transmission rod 26 makes the contact between the materials more sufficient, accelerates the heating rate and improves the production efficiency.

[0032] As a preferred embodiment, the connection between the second motor 11, the feeding pipe 13 and the second vacuum pump 12 and the vacuum chamber 2 is provided with a sealing ring 28. Further, the sealing ring 28 is made of rubber material to prevent air from entering the internal vacuum chamber 2 from the gap.

[0033] As a preferred embodiment, the wrapping layer 14 is tightly attached to the outer wall of the feeding pipe 13, and the top of the wrapping layer 14 is attached to the mechanical valve 15. The mechanical valve 15 is provided with a handle 29 on one side. Further, the wrapping layer 14 tightly attached to the feeding pipe 13 can achieve more precise sealing, and the handle 29 on one side of the mechanical valve 15 can allow the staff to manually close the mechanical valve 15 when not in use, preventing dust from falling into the inside and facilitating the next use.

[0034] The working process of the utility model is as follows: firstly, the titanium rod enters the vacuum chamber 2 through a mechanical valve 15 and a feed pipe 13, the feed inlet of the double-layer sealing design is to ensure that no external gas, especially oxygen and nitrogen, penetrates into the system during stirring and melting, the titanium rod is affected by the stirring mechanism 10 in the vacuum chamber 2, the design of the stirring mechanism 10 helps to uniformly mix and heat the titanium rod, and meanwhile avoids material loss or uneven melting caused by direct high temperature, while stirring, one side of the vacuum chamber 2 is provided with a second vacuum pump 12, the function of the device is to extract the gas in the vacuum chamber 2 and form a negative pressure environment, which further prevents any possible gas pollution and is beneficial to improve the melting efficiency, because the metal is easier to melt under low pressure, after stirring and preliminary heating, the titanium rod material falls into the heating coil 8 below, the heating coil 8 provides a large amount of heat energy to ensure that the titanium rod can be completely melted, under the double action of vacuum and high temperature, the titanium rod is converted into liquid titanium, ready for the next atomization treatment, the melted liquid titanium enters the titanium liquid atomization mechanism 7 below, in this step, the liquid titanium is dispersed into fine droplets through the three-way pipe 6, the droplets enter the rotary granulating mechanism 4 to form powder particles, and then are discharged through the first vacuum pump 5, this process is the key step of manufacturing titanium alloy powder, because it determines the particle size and shape of the powder, the above is the working principle of the novel sealing device for titanium alloy powder oxygen content detection.

Claims

1. A new type of sealing device for detecting oxygen content of titanium alloy powder, comprising a support frame (1) and a vacuum chamber (2), characterized in that: The bottom side of the support frame (1) is provided with a first motor (3), one side of the first motor (3) is provided with a rotary granulation mechanism (4), the lower side of the rotary granulation mechanism (4) is provided with a first vacuum pump (5), one side of the rotary granulation mechanism (4) is provided with a three-way pipe (6), one side of the three-way pipe (6) is provided with a titanium liquid atomization mechanism (7), the upper side of the titanium liquid atomization mechanism (7) is provided with a vacuum chamber (2), the inner wall of the lower side of the vacuum chamber (2) is provided with a heating coil (8), the heating coil (8) is provided with a plurality of groups, and each group of the heating coil (8) is uniformly arranged along the vertical direction of the vacuum chamber (2), the upper side of the heating coil (8) is provided with a heat conduction plate (9), the top center of the heat conduction plate (9) is provided with a stirring mechanism (10), the upper side of the stirring mechanism (10) is provided with a second motor (11), one side of the stirring mechanism (10) is provided with a second vacuum pump (12), the other side of the stirring mechanism (10) is provided with a feeding pipe (13), the outer wall of the feeding pipe (13) is provided with a wrapping layer (14), one side of the feeding pipe (13) is provided with a mechanical valve (15).

2. A novel sealing device for detecting oxygen content of titanium alloy powder according to claim 1, characterized in that: The inside of the rotary granulation mechanism (4), the titanium liquid atomization mechanism (7) and the stirring mechanism (10) is provided with an oxygen detector (16).

3. A novel sealing device for detecting oxygen content of titanium alloy powder according to claim 1, characterized in that: The rotary granulation mechanism (4) comprises a third motor (17), a shell (18), a rotating disc (19) and a discharge port (20), one side of the third motor (17) is provided with a shell (18), the inner center of the shell (18) is provided with a rotating disc (19), both sides of the rotating disc (19) are provided with spherical holes, one side of the rotating disc (19) is connected with the three-way pipe (6), one side of the outer wall of the shell (18) is provided with a discharge port (20).

4. A novel sealing device for detecting oxygen content of titanium alloy powder according to claim 3, characterized in that: The shell (18) is connected with the first vacuum pump (5) through the discharge port (20), so that the titanium alloy powder is discharged from the first vacuum pump (5).

5. A novel sealing device for detecting oxygen content of titanium alloy powder according to claim 1, characterized in that: The titanium liquid atomization mechanism (7) comprises a sealing layer (21), a liquid collecting tank (22), a negative pressure fan (23) and an inert gas tank (24), the inside of the sealing layer (21) is provided with a liquid collecting tank (22), the inside of the lower side of the liquid collecting tank (22) is connected with the three-way pipe (6), one side of the liquid collecting tank (22) is connected with a negative pressure fan (23) through the three-way pipe (6), one side of the negative pressure fan (23) is provided with an inert gas tank (24).

6. A novel sealing device for detecting oxygen content of titanium alloy powder according to claim 1, characterized in that: The stirring mechanism (10) comprises a stirring blade (25), a transmission rod (26) and a rotating shaft (27), the center of the stirring blade (25) is provided with a transmission rod (26), one end of the transmission rod (26) is provided with a rotating shaft (27), the transmission rod (26) is connected with the second motor (11) through the rotating shaft (27).

7. A novel sealing device for detecting oxygen content of titanium alloy powder according to claim 1, characterized in that: The connection parts of the second motor (11), the feeding pipe (13) and the second vacuum pump (12) with the vacuum chamber (2) are all provided with a sealing ring (28).

8. A novel sealing device for detecting oxygen content of titanium alloy powder according to claim 1, characterized in that: The wrapping layer (14) is close to the outer wall of the feed pipe (13), and the top of the wrapping layer (14) is fitted with the mechanical valve (15), and one side of the mechanical valve (15) is provided with a handle (29).

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