CN201446232U - A closed cycle purification inert atmosphere control device - Google Patents

Abstract

The utility model is a closed cycle purifying inert atmosphere control device, the air return pipe (13) is sequentially connected with the exhaust pipe three-way valve (2), dust filter (3), diaphragm booster pump (4), pressure gas storage Tank (5), intake pipe three-way valve (7), water eliminator (8), argon purifier (9) and water cooling jacket (10) are connected in series; water cooling jacket inlet pipe (11) passes through water cooling unit ( 10) Connect with the atmosphere shield (1). Exhaust pipe (14) is connected with exhaust pipe three-way valve (2). The two ends of the air inlet pipe (15) of the air storage tank are respectively sealed and connected with the three-way valve (7) of the air inlet pipe and the air inlet pipe (11). Both ends of the air supply pipeline (16) are connected with the gas cylinder (6) and the pressure gas storage tank (5) respectively. The utility model recycles the working gas in the process of laser forming and repairing, reduces the use and discharge of argon, and saves operating costs; the content of oxygen and nitrogen in the working process is controlled within 10ppm to ensure the quality of laser forming and repairing.

Description

A closed cycle purification inert atmosphere control device

1. Technical field

The material processing field of the present invention is specifically a closed-cycle purification inert atmosphere control device.

2. Background technology

The metal raw materials used in laser three-dimensional forming technology and laser forming and repairing technology are mostly powder materials. The process of forming and repairing is: the laser molten pool moving according to the predetermined trajectory receives the fed powder, the powder is melted at high temperature, and the laser beam moves After opening, the original molten pool solidifies and continues to form a new molten pool, which is a process of point deposition and point formation. In the process of laser three-dimensional forming and repairing, it is the key to ensure the quality of forming and repairing to prevent the contamination of molten pool and avoid alloy oxidation. Therefore, laser three-dimensional forming and repair equipment need to be equipped with an atmosphere protection system, mainly an inert atmosphere protection device based on argon. The currently used inert atmosphere protection devices are divided into two categories: one is to vacuumize first, and then fill with argon; the other is to discharge argon while filling with argon, which is a displacement protection. The disadvantages of heavy vacuum equipment and high cost, and the larger the equipment, the more obvious these shortcomings; while the replacement type has serious waste of inert gas, and the gas purity is difficult to control.

3. Contents of the invention

In order to overcome the problems existing in the existing inert atmosphere protection devices, such as bulky equipment, high cost, serious waste of inert gas, and difficult control of gas purity, the present invention proposes a closed-cycle purification inert atmosphere control device.

The invention includes an atmosphere protection cover, a diaphragm booster pump, a dust filter, a pressure gas storage tank, a water eliminator, an argon gas purifier, a water cooling jacket, a control unit and a sensor, wherein:

The return air pipeline starts from the atmosphere protective cover, and is connected with the three-way valve of the exhaust pipe, the dust filter, the diaphragm booster pump, the pressure gas storage tank, the three-way valve of the intake pipe, the water eliminator, the argon purifier and the water cooling jacket in sequence. Sealed connection; the air inlet pipe of the water cooling jacket is connected with the atmosphere protection cover through the water cooling unit. The exhaust pipe is connected with the three-way valve of the exhaust pipe. The two ends of the air inlet pipe of the gas storage tank are respectively sealed and connected with the three-way valve of the air inlet pipe and the air inlet pipe. The two ends of the gas supply pipeline are respectively sealed and connected with the gas cylinder and the pressure gas storage tank.

The oxygen content sensor, the nitrogen content sensor and the pressure sensor of the atmosphere protection cover are installed on the atmosphere protection cover, the pressure sensor of the gas storage tank is installed on the pressure gas storage tank, the moisture detection sensor is installed on the water eliminator, and the temperature The sensor is installed in the center of the argon gas purifier; the oxygen content sensor, nitrogen content sensor and pressure sensor of the atmosphere protection cover, the pressure sensor of the gas storage tank, the moisture detection sensor and the temperature sensor of the argon gas purifier are all connected to the control unit through cables .

The argon gas purifier is composed of the temperature sensor of the argon gas purifier, the heat preservation shell, the heating resistance wire, and the purification material, and is mainly used to remove oxygen, nitrogen and hydrogen. Its structural composition is as follows: the heating resistance wire is spirally coiled from top to bottom along the inner wall of the heat preservation shell, and the purification material fills the entire interior of the heat preservation shell. The inlet pipe and the outlet pipe of the argon gas purifier are connected into the argon gas purifier from the thermal insulation shell at the upper end of the argon gas purifier, and are sealed and connected with the thermal insulation shell.

The purification material is Ti-Zr-V alloy particles.

The closed cycle purification inert atmosphere control device proposed by the present invention enables the working gas (argon) in the process of laser forming and repair to be recycled, reduces the use and discharge of argon, and saves operating costs; at the same time, the purity of argon is high, and the working process The content of oxygen and nitrogen in the medium can always be controlled within 10ppm to ensure the metallurgical quality of laser forming and repairing.

4. Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic diagram of the structure of the argon purifier of the present invention. in:

1. Air protection cover 2. Exhaust pipe three-way valve 3. Dust filter 4. Diaphragm booster pump

5. Pressure gas storage tank 6. Gas cylinder 7. Inlet pipe three-way valve 8. Water eliminator

9. Argon purifier 10. Water cooling jacket 11. Water cooling jacket intake pipe 12. Control unit

13. Air return pipe 14. Exhaust pipe 15. Air storage tank intake pipe 16. Air supply pipe

17. Oxygen content sensor 18. Nitrogen content sensor 19. Atmosphere shield pressure sensor

20. Gas tank pressure sensor 21. Moisture detection sensor 22. Temperature sensor 23. Insulation shell

24. Heating resistance wire 25. Purification material 26. Inlet pipe 27. Outlet pipe

5. Specific implementation

A closed cycle purification inert atmosphere control device, comprising an atmosphere protection cover 1, a diaphragm booster pump 4, a dust filter 3, a pressure gas storage tank 5, a water eliminator 8, an argon gas purifier 9, a water cooling jacket 10, and a control unit 12 and sensor, wherein:

The air return pipeline 13 starts from the atmosphere protective cover 1, and successively connects with the exhaust pipe three-way valve 2, dust filter 3, diaphragm booster pump 4, pressure gas storage tank 5, intake pipe three-way valve 7, water eliminator 8 and The argon gas purifiers 9 are sealed in series; the gas inlet pipe 11 is connected with the atmosphere protection cover 1 through the water cooling jacket 10 . The exhaust pipe 14 is connected with the three-way valve 2 of the exhaust pipe. The two ends of the air inlet pipe 15 of the gas storage tank are respectively sealed and connected with the three-way valve 7 of the air inlet pipe and the air inlet pipe 11 of the water cooling jacket. The two ends of the gas supply pipeline 16 are respectively sealed and connected with the gas cylinder 6 and the pressure gas storage tank 5 .

Oxygen content sensor 17, nitrogen content sensor 18 and atmosphere protection cover pressure sensor 19 are installed on the atmosphere protection cover 1, are connected with control unit 12 through cable, provide detection information for control unit 12, and are controlled by control unit 12. The gas storage tank pressure sensor 20 is installed on the pressure gas storage tank 5 , is connected with the control unit 12 via a cable, provides detection information for the control unit 12 , and is controlled by the control unit 12 . The moisture detection sensor 21 is installed on the water eliminator 8, and is connected with the control unit 12 through a cable, provides detection information for the control unit 12, and is controlled by the control unit 12. The temperature sensor 22 of the argon gas purifier is installed in the central part of the argon gas purifier 9, and is connected with the control unit 12 through a cable, provides detection information for the control unit 12, and is controlled by the control unit 12.

The control unit 12 is composed of PLC controller, relay, power supply, air switch and other electrical components, providing power for each component, collecting oxygen content sensor 17, nitrogen content sensor 18, atmosphere protective cover pressure sensor 19, gas storage tank pressure sensor 20 , the detection information of the temperature sensor 22 of the moisture detection sensor 21 and the argon purifier, and controls the recovery, pressurization, storage, replenishment and purification of argon.

The argon purifier 9 is composed of an insulating shell 23, a heating resistance wire 24 and a purification material 25, and is mainly used for removing oxygen, nitrogen and hydrogen. Its structural composition is as follows: the heating resistance wire 24 is spirally coiled from top to bottom along the inner wall of the heat preservation shell 23 ; the purification material 25 fills the entire interior of the heat preservation shell 23 . The inlet pipe 26 and the gas outlet pipe 27 of the argon gas purifier 9 are inserted into the argon gas purifier 9 from the thermal insulation shell 23 at the upper end of the argon gas purifier 9, and are sealed with the thermal insulation shell 23; the gas inlet pipe 26 is inserted into the argon gas purifier Gas cleaner 9 bottom.

In this embodiment, Ti-Zr-V alloy particles with a particle size of 0.8-2 mm are selected as the purification material 25 .

Claims (3)

1. a closed circulation purifies inert atmosphere control device; it is characterized in that; described closed circulation purifies inert atmosphere control device and comprises atmosphere protection cover (1), diaphragm booster pump (4), dust filter unit (3), pressure gas tank (5), dehydrater (8), purification for argon device (9), water collar (10), control module (12) and sensor, wherein:

A return-air duct 13 is tightly connected with blast pipe three-way valve (2), dust filter unit (3), diaphragm booster pump (4), pressure gas tank (5), air inlet pipe three-way valve (7), dehydrater (8), purification for argon device (9) and water collar (10) serial successively from atmosphere protection cover (1) beginning; Water collar admission line (11) is connected with atmosphere protection cover (1) by water-cooled unit (10);

B. discharge duct (14) is connected with blast pipe three-way valve (2).The two ends of air accumulator admission line (15) are tightly connected with air inlet pipe three-way valve (7) and admission line (11) respectively;

C. the two ends of tonifying Qi pipeline 16 are tightly connected with gas cylinder (6) and pressure gas tank (5) respectively;

D. oxygen level sensor (17), nitrogen content sensor (18) and atmosphere protective cover pressure sensor (19) are installed on the atmosphere protection cover (1), air accumulator pressure sensor (20) is installed on the pressure gas tank (5), moisture content detecting sensor (21) is installed on the dehydrater (8), and the temperature sensor of purification for argon device (22) is installed in the centre of purification for argon device (9); The temperature sensor (22) of oxygen level sensor (17), nitrogen content sensor (18) and atmosphere protective cover pressure sensor (19), air accumulator pressure sensor (20), moisture content detecting sensor (21) and purification for argon device all is connected with control module (12) through cable.

2. a kind of according to claim 1 closed circulation purifies inert atmosphere control device, it is characterized in that described purification for argon device (9) comprises temperature sensor (22), insulation shell (23), resistive heater (24), the scavenging material (25) of purification for argon device; Resistive heater (24) is along the inwall of insulation shell (23) coiled coil from top to bottom, and scavenging material (25) is filled the inside of whole insulation shell (23); The air inlet pipe (26) of purification for argon device (9) and escape pipe 27 insert in the purification for argon device (9) from the insulation shell (23) of the upper end of purification for argon device (9), and are tightly connected with insulation shell (23).

3. purify inert atmosphere control device as a kind of closed circulation as described in the claim 2, it is characterized in that described scavenging material is the particle of Ti-Zr-V alloy.

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