CN110193607B - Plasma gun for plasma rotating electrode powder manufacturing equipment - Google Patents
Plasma gun for plasma rotating electrode powder manufacturing equipment Download PDFInfo
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- CN110193607B CN110193607B CN201711031501.6A CN201711031501A CN110193607B CN 110193607 B CN110193607 B CN 110193607B CN 201711031501 A CN201711031501 A CN 201711031501A CN 110193607 B CN110193607 B CN 110193607B
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- cooling
- plasma
- rotating speed
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- cathode
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/10—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying using centrifugal force
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/26—Plasma torches
- H05H1/32—Plasma torches using an arc
- H05H1/42—Plasma torches using an arc with provisions for introducing materials into the plasma, e.g. powder, liquid
Abstract
The invention relates to a plasma gun for a plasma rotating electrode powder manufacturing device, which comprises: receiving device, controlling means, feeding device, cooling device, generating device, fixing device. The plasma gun for the plasma rotating electrode powder manufacturing equipment can automatically open and close the plasma gun according to the working state of the equipment with the rotating speed identification equipment, and the cooling system is provided with the synchronizing device to synchronously cool the anode disc, the cathode tungsten alloy rod and the plasma gun nozzle, so that the continuous work of the gun can be ensured, and the stable powder manufacturing by plasma rotating atomization can be ensured.
Description
Technical Field
The invention relates to a plasma device for manufacturing metal powder, in particular to a plasma gun for plasma rotating electrode powder manufacturing equipment.
Background
The plasma is used as a high-temperature heat source and is widely applied to the industry in the sixty years. With the continuous development of science and technology, plasma arcs are widely applied in the fields of cutting, welding, spraying and the like, and the structural forms of plasma guns are greatly different according to different purposes.
The plasma rotating electrode atomization powder making device is called as PREP, molten metal is thrown into fine liquid drops by utilizing centrifugal force generated by high-speed rotation of an electrode, and the liquid drops are solidified to form spherical powder. High-quality spherical powder is an important raw material required by powder metallurgy net forming, 3D printing and the like, the powder preparation of the plasma rotating electrode is one of important methods for preparing the alloy, and the plasma is used as a heat source for bar melting and is one of key equipment in equipment for manufacturing the spherical powder by the rotating electrode. The design of the plasma gun which is efficient, safe and stable in production is an important factor for improving the quality and the production efficiency of powder finished products.
Disclosure of Invention
Accordingly, the present invention provides a plasma gun for a plasma-rotating electrode pulverizing apparatus that solves or partially solves the above-mentioned problems.
In order to achieve the effect of the technical scheme, the technical scheme of the invention is as follows: a plasma gun for a plasma rotating electrode pulverizing apparatus, comprising: the device comprises a receiving device, a control device, a supply device, a cooling device, a generating device and a fixing device;
the receiving device, the control device, the supply device, the cooling device and the generating device are integrated on the fixing device; the control device, the supply device, the cooling device and the generating device are all started or closed according to the instruction sent by the receiving device, and present a use state or a closed state, and the device can execute the instruction only in the use state;
the fixing device comprises a nozzle and a shell, the nozzle is used for outputting a transfer arc, and the shell is placed on a feeding guide rail of the plasma rotating electrode powder making equipment;
receiving arrangement includes speed sensor, temperature sensor, trigger element, delay unit, and speed sensor is used for measuring the rotational speed of plasma rotating electrode powder process equipment and transmits for trigger element, and trigger element is used for handling the rotational speed that speed sensor gathered and generates control command, and control command includes start instruction and shutdown instruction, and the formation process is as follows: if the rotating speed acquired by the rotating speed sensor is continuously increased and reaches the standard starting rotating speed, generating a starting instruction; if the rotating speed acquired by the rotating speed sensor is continuously reduced and reaches the standard shutdown rotating speed, a shutdown instruction is generated; the starting-up command is sent to the control device, the supply device, the cooling device and the generating device, and the device receiving the starting-up command is started and is in a use state; the shutdown instruction is sent to the control device, the supply device, the generating device and the delay unit, and the device receiving the startup instruction is closed and is in a closed state; the temperature sensor is used for measuring the temperature of the fixing device, the delay unit monitors the temperature measured by the temperature sensor after receiving the shutdown instruction, and when the monitored temperature reaches the safe temperature, the delay unit sends a delay shutdown instruction to the cooling device to shut down the cooling device; the standard starting rotation speed, the standard shutdown rotation speed and the safe temperature are design parameters of the plasma rotating electrode powder manufacturing equipment;
the outlet of the supply device is circular and is used for outputting argon, the argon is output along the tangential direction of the outlet of the supply device to form a spiral argon flow, and the argon flow is injected into the generating device;
the control device comprises a current control unit and a temperature control unit, wherein the current control unit provides power for the generation device, the use condition is set as a direct current power supply, and the current is 1500-2000A; the temperature control unit is used for heating argon in the generating device, and the temperature of the argon is set to be 13000-18000 ℃;
the generating device comprises a cathode tungsten alloy rod and an anode disc, wherein the cathode tungsten alloy rod is connected with the cathode of a direct-current power supply, and the anode of the direct-current power supply is connected with the anode of the plasma rotating electrode powder making equipment; when the generating device is in a use state, argon is ionized under the action of a direct-current power supply, a plasma arc is generated under the action of high temperature, the anode disc plays a role in arc striking, and the plasma arc is transited between the cathode tungsten alloy rod and the anode of the plasma rotating electrode powder making equipment, so that a stable transferred arc is formed;
the cooling device comprises a time control unit and three cooling units, wherein the cooling units are respectively provided with independent cooling pipelines; the three cooling units are an anode cooling unit, a cathode cooling unit and a nozzle cooling unit, wherein the anode cooling unit is used for cooling an anode disc, the cathode cooling unit is used for cooling a cathode tungsten alloy rod, and the nozzle cooling unit is used for cooling a nozzle; the time control unit is used for controlling the water inlet time of the cooling pipeline, and the control process is as follows: when the cooling device is in a use state, the time control unit synchronously sends a clock signal of 0.1HZ to the three cooling units, the cooling units receive the clock signal in real time, when the clock signal is at a high level, the cooling pipeline starts to feed water, and when the clock signal is at a low level, the water feeding is stopped.
The beneficial results of the invention are as follows: the invention provides a plasma gun for a plasma rotating electrode powder manufacturing device, which can automatically open and close the plasma gun according to the working state of the device identified by the rotating speed of the device, and a cooling system is provided with a synchronizer to synchronously cool an anode disc, a cathode tungsten alloy rod and a plasma gun nozzle, so that the continuous work of the gun can be ensured, and the stable powder manufacturing of plasma rotating atomization can be ensured.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more apparent, the present invention is described in detail below with reference to the embodiments. It should be noted that the specific embodiments described herein are only for illustrating the present invention and are not to be construed as limiting the present invention, and products that can achieve the same functions are included in the scope of the present invention. The specific method comprises the following steps:
example 1: this embodiment specifically describes the structure of a plasma gun for a plasma rotating electrode pulverizing apparatus, as follows:
plasma gun that plasma rotating electrode powder process equipment was used includes: the device comprises a receiving device, a control device, a supply device, a cooling device, a generating device and a fixing device;
the receiving device, the control device, the supply device, the cooling device and the generating device are integrated on the fixing device; the control device, the supply device, the cooling device and the generating device are all started or closed according to the instruction sent by the receiving device, and present a use state or a closed state, and the device can execute the instruction only in the use state;
the fixing device comprises a nozzle and a shell, the nozzle is used for outputting a transfer arc, and the shell is placed on a feeding guide rail of the plasma rotating electrode powder making equipment;
receiving arrangement includes speed sensor, temperature sensor, trigger element, delay unit, and speed sensor is used for measuring the rotational speed of plasma rotating electrode powder process equipment and transmits for trigger element, and trigger element is used for handling the rotational speed that speed sensor gathered and generates control command, and control command includes start instruction and shutdown instruction, and the formation process is as follows: if the rotating speed acquired by the rotating speed sensor is continuously increased and reaches the standard starting rotating speed, generating a starting instruction; if the rotating speed acquired by the rotating speed sensor is continuously reduced and reaches the standard shutdown rotating speed, a shutdown instruction is generated; the starting-up command is sent to the control device, the supply device, the cooling device and the generating device, and the device receiving the starting-up command is started and is in a use state; the shutdown instruction is sent to the control device, the supply device, the generating device and the delay unit, and the device receiving the startup instruction is closed and is in a closed state; the temperature sensor is used for measuring the temperature of the fixing device, the delay unit monitors the temperature measured by the temperature sensor after receiving the shutdown instruction, and when the monitored temperature reaches the safe temperature, the delay unit sends a delay shutdown instruction to the cooling device to shut down the cooling device; the standard starting rotation speed, the standard shutdown rotation speed and the safe temperature are design parameters of the plasma rotating electrode powder manufacturing equipment;
the outlet of the supply device is circular and is used for outputting argon, the argon is output along the tangential direction of the outlet of the supply device to form a spiral argon flow, and the argon flow is injected into the generating device;
the control device comprises a current control unit and a temperature control unit, wherein the current control unit provides power for the generation device, the use condition is set as a direct current power supply, and the current is 1500-2000A; the temperature control unit is used for heating argon in the generating device, and the temperature of the argon is set to be 13000-18000 ℃;
the generating device comprises a cathode tungsten alloy rod and an anode disc, wherein the cathode tungsten alloy rod is connected with the cathode of a direct-current power supply, and the anode of the direct-current power supply is connected with the anode of the plasma rotating electrode powder making equipment; when the generating device is in a use state, argon is ionized under the action of a direct-current power supply, a plasma arc is generated under the action of high temperature, the anode disc plays a role in arc striking, and the plasma arc is transited between the cathode tungsten alloy rod and the anode of the plasma rotating electrode powder making equipment, so that a stable transferred arc is formed;
the cooling device comprises a time control unit and three cooling units, wherein the cooling units are respectively provided with independent cooling pipelines; the three cooling units are an anode cooling unit, a cathode cooling unit and a nozzle cooling unit, wherein the anode cooling unit is used for cooling an anode disc, the cathode cooling unit is used for cooling a cathode tungsten alloy rod, and the nozzle cooling unit is used for cooling a nozzle; the time control unit is used for controlling the water inlet time of the cooling pipeline, and the control process is as follows: when the cooling device is in a use state, the time control unit synchronously sends a clock signal of 0.1HZ to the three cooling units, the cooling units receive the clock signal in real time, when the clock signal is at a high level, the cooling pipeline starts to feed water, and when the clock signal is at a low level, the water feeding is stopped.
Example 2: this embodiment mainly illustrates the structure of a plasma gun for a plasma rotating electrode pulverizing apparatus, as follows:
plasma gun for manufacturing plasma rotating electrode powder manufacturing equipment system mainly comprises: supply device, cooling device, generating device, fixing device.
(1) Generating device
The generating device mainly comprises a cathode tungsten alloy rod and an anode disc, wherein the cathode tungsten alloy rod is arranged in a core cavity of the anode disc and keeps coaxial, the diameter D of the cathode tungsten alloy rod is 15-40mm, the head of the cathode tungsten alloy rod is polished smoothly, the distance L extending out of the anode disc is 0.2D-1.5D, and the arcing gap D between the cathode tungsten alloy rod and the core of the anode disc is 0.5-5 mm.
(2) Cooling device
The high-efficient cooling water runner of plasma gun is equipped with 3 cooling channels for the cooling anode disc, negative pole tungsten alloy stick and nozzle, thereby take away a large amount of heats that plasma arc radiation produced when rotatory centrifugal atomization. The cooling water of the anode disk flows spirally from the center to the periphery. The tail end of the water inlet pipe of the cathode tungsten rod is closer to the cathode tungsten alloy rod than the primary end of the water outlet pipe.
(3) Supply device
The supply device provides argon required by the plasma gun, and the argon enters a cavity gap formed by the cathode tungsten alloy rod, the anode disc and the fixed disc, wherein the boss stepped structure of the fixed disc is concentric with the tungsten cathode tungsten alloy rod, the lower boss surface of the fixed disc is connected with the anode disc, and the side surface of the upper boss is provided with an air inlet.
(4) Fixing device
The plasma gun is wholly wrapped and fixed by a shell, the shell is provided with a threaded hole and a step hole and is used for fixing the plasma gun on a feeding guide rail of plasma rotating electrode powder manufacturing equipment, water, electricity and gas interfaces are arranged on the shell and are respectively connected to a generating device, a cooling device and a supplying device, a sealing sleeve made of insulating materials is used between an anode disc and the shell for insulation, an insulating adhesive tape is wound on the surface of a pipe of a cooling channel of the plasma gun, insulation between the pipe and the shell and between the pipe and other parts is guaranteed, and short circuit between the cathode and the anode of the plasma gun is prevented.
The beneficial results of the invention are as follows: the invention provides a plasma gun for a plasma rotating electrode powder manufacturing device, which can automatically open and close the plasma gun according to the working state of the device identified by the rotating speed of the device, and a cooling system is provided with a synchronizer to synchronously cool an anode disc, a cathode tungsten alloy rod and a plasma gun nozzle, so that the continuous work of the gun can be ensured, and the stable powder manufacturing of plasma rotating atomization can be ensured.
The above description is only for the preferred embodiment of the present invention, and should not be used to limit the scope of the claims of the present invention. While the foregoing description will be understood and appreciated by those skilled in the relevant art, other equivalents may be made thereto without departing from the scope of the claims.
Claims (1)
1. The utility model provides a plasma gun that plasma rotating electrode powder process equipment used which characterized in that includes: the device comprises a receiving device, a control device, a supply device, a cooling device, a generating device and a fixing device;
said receiving means, said control means, said supply means, said cooling means, said generating means are all integrated on said fixing means; the control device, the supply device, the cooling device and the generating device are all started or closed according to the instruction sent by the receiving device, and are in a use state or a closed state, and the device can execute the instruction only in the use state;
the fixing device comprises a nozzle and a shell, the nozzle is used for outputting a transfer arc, and the shell is placed on a feeding guide rail of the plasma rotating electrode powder making equipment;
the receiving device comprises a rotating speed sensor, a temperature sensor, a trigger unit and a delay unit, wherein the rotating speed sensor is used for measuring the rotating speed of the plasma rotating electrode pulverizing equipment and transmitting the rotating speed to the trigger unit, the trigger unit is used for processing the rotating speed acquired by the rotating speed sensor and generating a control instruction, the control instruction comprises a starting instruction and a shutdown instruction, and the generation process is as follows: if the rotating speed acquired by the rotating speed sensor is continuously increased, generating the starting instruction when the rotating speed reaches the standard starting rotating speed; if the rotating speed acquired by the rotating speed sensor is continuously reduced, generating the shutdown instruction when the rotating speed reaches the standard shutdown rotating speed; the starting-up instruction is sent to the control device, the supply device, the cooling device and the generating device, and the device receiving the starting-up instruction is started and is in the use state; the shutdown instruction is sent to the control device, the supply device, the generation device and the delay unit, and the device receiving the shutdown instruction is shut down and is in the shutdown state; the temperature sensor is used for measuring the temperature of the fixing device; the delay unit monitors the temperature measured by the temperature sensor after receiving the shutdown instruction, and when the monitored temperature reaches a safe temperature, the delay unit sends a delay shutdown instruction to the cooling device to shut down the cooling device; the standard starting rotation speed, the standard shutdown rotation speed and the safe temperature are design parameters of plasma rotating electrode powder manufacturing equipment;
the outlet of the supply device is circular and is used for outputting argon, the argon is output along the tangential direction of the outlet of the supply device to form a spiral argon flow, and the argon flow is injected into the generating device;
the control device comprises a current control unit and a temperature control unit, wherein the current control unit provides power for the generating device, the use condition is set as a direct current power supply, and the current is 1500-2000A; the temperature control unit is used for heating argon in the generating device, and the heating temperature is set to be 13000-18000 ℃;
the generating device comprises a cathode tungsten alloy rod and an anode disc, the cathode tungsten alloy rod is connected with the cathode of the direct-current power supply, and the anode of the direct-current power supply is connected with the anode of the plasma rotating electrode powder making equipment; when the generating device is in the using state, argon in the generating device is ionized under the action of the direct-current power supply, a plasma arc is generated under the action of high temperature, the anode disc plays a role in arc initiation, and the plasma arc is transited between the cathode tungsten alloy rod and the anode of the plasma rotating electrode powder making equipment, so that a stable transferred arc is formed and is output by the nozzle;
the cooling device comprises a time control unit and three cooling units, wherein the cooling units are respectively provided with independent cooling pipelines; the three cooling units are an anode cooling unit, a cathode cooling unit and a nozzle cooling unit, wherein the anode cooling unit is used for cooling the anode disc, the cathode cooling unit is used for cooling the cathode tungsten alloy rod, and the nozzle cooling unit is used for cooling the nozzle; the time control unit is used for controlling the water inlet time of the cooling pipeline, and the control process is as follows: when the cooling device is in the use state, the time control unit synchronously sends 0.1HZ clock signals to the three cooling units, the cooling units receive the clock signals in real time, when the clock signals are at a high level, the cooling pipeline starts to feed water, and when the clock signals are at a low level, the water feeding is stopped;
the cathode tungsten alloy rod is arranged in the cavity of the core part of the anode disc and keeps coaxial, the diameter D of the cathode tungsten alloy rod is 15-40mm, the head part of the cathode tungsten alloy rod is polished smoothly, the distance L extending out of the anode disc is 0.2D-1.5D, and the arcing clearance D between the cathode tungsten alloy rod and the core part of the anode disc is 0.5-5 mm;
the cooling water of the anode disc spirally flows to the periphery from the center; the tail end of the water inlet pipe of the cathode tungsten rod is closer to the cathode tungsten alloy rod than the primary end of the water outlet pipe.
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| CN201711031501.6A CN110193607B (en) | 2017-10-27 | 2017-10-27 | Plasma gun for plasma rotating electrode powder manufacturing equipment |
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| CN201711031501.6A CN110193607B (en) | 2017-10-27 | 2017-10-27 | Plasma gun for plasma rotating electrode powder manufacturing equipment |
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| CN110193607B true CN110193607B (en) | 2022-03-11 |
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Address after: 310000 No. 372, Jinpeng street, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province Patentee after: Zhejiang Yatong New Materials Co.,Ltd. Address before: 310030 north of Xiyuan 8th Road, Sandun Xihu Science Park, Xihu District, Hangzhou City, Zhejiang Province Patentee before: ZHEJIANG ASIA GENERAL SOLDERING & BRAZING MATERIAL Co.,Ltd. |