CN-121972619-A - Internal thread copper pipe prevents oil smoke suck-back device

Abstract

The invention discloses an oil smoke-proof back-suction device of an internal thread copper pipe, which relates to the technical field of nonferrous metal processing and is used for being installed on an annealing blowing rod, wherein an air inlet is formed in the annealing blowing rod and comprises an air guide head, a conical air isolation cover and a spring, the air guide head is arranged on the annealing blowing rod, an air guide head inlet and an air guide head inner hole which are mutually communicated are formed in the air guide head, the air guide head inner hole is communicated with the air inlet, the conical air isolation cover is arranged in the annealing blowing rod, one side of the conical air isolation cover faces the air inlet, and the other side of the conical air isolation cover is connected with the inner wall of the annealing blowing rod through the spring. Through set up the internal thread copper pipe and prevent oil smoke back-draft device on finished product annealing sweep bar air inlet, both be convenient for with inside inert shielding gas introduction annealing sweep bar, also can effectively prevent simultaneously that inert gas from blowing the back of accomplishing, effectively prevent in the annealing process furnace atmosphere oil smoke gas from back-sucking copper pipe inner wall, avoid the oil smoke to get into the inside secondary cooling of copper pipe and condense to reduce copper pipe inner wall residual oil value.

Inventors

• HUANG HONGBING
• MAO XIANGFEI
• ZHU WEICHANG

Assignees

• 宁波金田铜管有限公司

Dates

Publication Date

20260505

Application Date

20220826

Claims (3)

1. 1. The utility model provides an internal thread copper pipe oil smoke prevention back-suction device for install on annealing sweep pole, wherein, the air inlet has been seted up on the annealing sweep pole, its characterized in that, including air guide head, toper gas shield and spring, the air guide head is located on the annealing sweep pole, just air guide head entry and the air guide head hole of mutual intercommunication have been seted up on the air guide head, wherein, air guide head hole with the air inlet intercommunication, the toper gas shield is located the inside of annealing sweep pole, toper gas shield one side is just right the air inlet, the opposite side of toper gas shield passes through the spring with the inner wall connection of annealing sweep pole.
2. 2. The oil smoke preventing reverse suction device of the internal thread copper pipe according to claim 1, wherein, The novel air guide device is characterized by further comprising a metal positioning gasket and a graphite sealing ring, wherein the graphite sealing ring is sleeved on the outer edge of one side of the air guide head, and the metal positioning gasket is sleeved on the outer edge of the graphite sealing ring.
3. 3. The oil fume back draft preventing device for the internal thread copper pipe according to claim 2, further comprising a metal sealing gasket, wherein the metal sealing gasket is arranged between the air guide head and the annealing blowing rod, a through hole is formed in the metal sealing gasket, and the air guide head inlet, the air guide head inner hole, the through hole and the air inlet are coaxially arranged.

Description

Internal thread copper pipe prevents oil smoke suck-back device The application relates to a method for processing an internal thread copper pipe, a lampblack absorbing and oil smoke preventing back-sucking device, which is applied separately from the application of 2022, no. 08, no. 26 and CN 202211037997.9. Technical Field The invention relates to the technical field of nonferrous metal processing, in particular to an oil smoke back-suction prevention device for an internal thread copper pipe. Background Compared with a conventional smooth pipe, the internal thread pipe has a certain number of regular threads on the inner surface, so that the heat exchange area can be increased, and a turbulent flow effect can be formed, so that the heat exchange efficiency of the internal thread pipe is improved by 20% -30% compared with that of a light pipe. However, in the actual production process, because a certain number of grooves exist on the inner wall of the internal thread, the cleanliness of the inner wall is poorer than that of a smooth copper pipe in the processing process, and particularly, the inner film oil can remain on the inner wall in the processing process of the internal thread and is difficult to remove. At present, the specification of an internal thread copper pipe mainly used in the air conditioning industry is phi 7mm internal thread, and the copper pipe internal surface residual oil value for a refrigerator is regulated to be not more than 7mg/m & lt 2 & gt in national standard GB/T17791-2017 copper alloy seamless pipe for air conditioning and refrigeration equipment, and a daily system client further requires that the copper pipe internal surface residual oil value be not more than 2.5 mg/m & lt 2 & gt (which is equivalent to the phi 7mm internal thread copper pipe internal surface residual oil value not more than 0.1 mg/m). This is because the residual oil on the inner surface of the copper tube affects the quality of the weld of the customer and subsequently reacts chemically with the air conditioning refrigerant, reducing the cooling effect. Particularly, in the use process of the air conditioner, oil residues on the inner surface of the copper pipe can chemically react with water and air to generate weak acid substances, so that the inner wall of the copper pipe is corroded, and the service life of the copper pipe is shortened. The production process of the internal thread copper pipe comprises the steps of horizontal continuous casting, milling and pulling (face milling, rolling and combined pulling), disc pulling, on-line annealing, internal thread forming, horizontal rewinding and finished product annealing. The three working procedures of combined drawing, disc drawing and internal thread forming are to ensure the quality of the inner surface of the copper pipe, and a certain amount of inner film oil is required to be injected into the inner surface of the copper pipe before drawing. And in the processes of combined drawing and coil drawing, the copper pipe has larger drawing processing rate, so that the viscosity of the required inner film oil is higher, and the residual oil quantity on the inner wall of the copper pipe after finished annealing is large. Particularly, in the final annealing process of the finished product, residual oil in the copper pipe can be cracked and vaporized, and discharged from the tail of the copper pipe, so that the annealing furnace is filled with oil smoke, the copper pipe can suck back the oil smoke in the cooling stage of the furnace, and the phenomenon of higher residual oil value of the inner wall of the pipe is caused. In order to solve the problems, the prior art is mainly improved in terms of components of inner film oil to reduce the residual oil quantity, but aiming at the strict requirement that the residual oil in the inner surface of a copper pipe is not more than 2.5 mg/m 2, an auxiliary device is optimally designed on the basis of the production process of the inner thread copper pipe, so that the high-cleanness inner thread copper pipe with low residual oil in the inner wall is produced and prepared, and the service life of the copper pipe is prolonged while the residual oil standard of a customer is met. Disclosure of Invention The invention aims to provide a processing method of an internal thread copper pipe, and a lampblack adsorption and lampblack-proof backward suction device, which are used for solving the technical problems. The technical scheme adopted by the invention is as follows: The internal thread copper pipe oil smoke adsorption device comprises an on-line annealing feeding frame arranged at a discharging end of an on-line induction annealing process, an on-line annealing discharging frame arranged at a receiving end of the on-line induction annealing process, a ventilation connecting vertical rod arranged in the on-line annealing feeding frame, and an adsorption mechanism arranged outside the on-line annealing feeding fram