WO2022001045A1

WO2022001045A1 - Online automatic purging apparatus for copper tube

Info

Publication number: WO2022001045A1
Application number: PCT/CN2020/140635
Authority: WO
Inventors: 张军辉; 原路线; 齐聪雨
Original assignee: 上海龙阳精密复合铜管有限公司
Priority date: 2020-07-02
Filing date: 2020-12-29
Publication date: 2022-01-06
Also published as: CN213409682U

Abstract

An online automatic purging apparatus for a copper tube, the apparatus comprising a housing (100), wherein a cylindrical sealed cavity (100a) for a copper tube (1) to be inserted into is formed in the housing (100); one end of the cylindrical sealed cavity (100a) is positioned at a side portion of the housing (100) and is formed into a copper tube insertion port (101), and the other end of the cylindrical sealed cavity (100a) is closed; an annular sealed cavity (100b), which is in communication with the cylindrical sealed cavity (100a), is formed at a side portion of the cylindrical sealed cavity (100a) in the housing (100); a piston (300) for compressing a sealing member (200) to tightly hold the copper tube (1) is slidably configured on the annular sealed cavity (100b); and the housing (100) is respectively provided with a first compressed air port (110) and a second compressed air port (120) for feeding or discharging compressed air, and a nitrogen inlet (130) provided in the housing (100) and used for feeding nitrogen. Compared with the prior art, the apparatus can bear nitrogen purging under a relatively high pressure; and a sealing ring is relatively durable, the cost is low, and the number of times workers perform replacing and sealing is reduced.

Description

An online automatic purging device for copper pipes

technical field

The utility model relates to the technical field of copper pipe production equipment, in particular to an online automatic purging device for copper pipes.

Background technique

During the drawing process of the copper tube, a lubricating oil should be added, and the annealed finished coil has strict restrictions on the amount of residual oil on the inner and outer walls of the tube. Therefore, the copper tube coil needs to be adjusted during the annealing process. Its inner wall is purged.

Referring to FIG. 1, what is shown in the figure is an existing copper tube online automatic purging device, including a copper tube purging and sealing seat 10 and a silicone tube 20, and a copper tube purging and sealing seat 10 is formed with a copper tube 1 to be inserted into. Cylindrical sealing cavity 11, one end of the cylindrical sealing cavity 11 is located on the side wall of the copper tube purging seal seat 10 and is formed into a copper tube insertion port 11a, and the other end of the cylindrical sealing cavity 11 is closed. A pair of

circular ring parts

11b and 11c are formed in the middle part, and the two ends of the silicone tube 20 are respectively sleeved on the

circular ring parts

11b and 11c; And a nitrogen delivery channel 13, one end of the compressed air delivery channel 12 is communicated with the cylindrical sealing cavity 11 and is located between the

annular parts

11b, 11c, and the other end is connected to the air supply end of the air compressor through a pipeline, and the nitrogen gas One end of the conveying channel 13 is connected with the closed end of the cylindrical sealing cavity 11 , and the other end is connected with the gas supply end of the nitrogen gas preparation device. When working, first insert one end of the copper tube 1 into the cylindrical sealing cavity 11 from the copper tube insertion port 11a, and extend to a position slightly beyond the annular portion 11c, and the silicone tube 20 is wrapped around the copper tube 1 and enters the cylindrical sealing cavity. On the outer pipe surface of the pipe body in the cavity 11 . Next, the compressed gas generated by the air compressor enters the cylindrical sealed cavity 11 through the compressed air conveying channel 12, and the compressed air presses the outer surface of the silicone tube 20, so that the silicone tube 20 is deformed to the center and holds the copper tightly. The outer tube surface of the tube 1 between the

annular portions

11b, 11c forms a seal. At this time, the nitrogen generated by the nitrogen preparation device enters the cylindrical sealed cavity 11 through the nitrogen delivery channel 13, and enters the inner cavity of the copper tube 1 from the tail end of the copper tube 1 to realize online purging of the inner cavity of the copper tube and remove the copper tube. Oil fumes generated by the heating of the inner cavity. However, the existing copper tube online automatic purging device has the following problems in the continuous production process: 1. After the silicone tube 20 is used for 3 to 5 times, there will be a problem of insufficient rebound, because one online nitrogen purge process continues For more than an hour, the silicone tube 20 will not rebound sufficiently after being compressed for a long time. The shape of the silicone tube 20 changes from a circular shape to an oval shape with concave sides on both sides. The automatic penetration of the copper tube 1 is blocked, and the mouth of the tube is easy to puncture the silicone tube 20 to cause air leakage. In the event of air leakage, the sealed cavity of nitrogen cannot be formed, and the nitrogen gas will be purged or blown into the copper tube together with compressed air, resulting in oxidation of the inner wall of the copper tube and excess oil on the inner wall. 2. Due to the leakage of the silicone tube 20, the force to hold the copper tube decreases or disappears. Once the copper tube 1 loses its holding force, it is possible that the copper tube will be centrifugally thrown out during the high-speed rotation of the material frame to purge the sealing seat 10, causing the copper tube to be scrapped.

At present, there is a Chinese Patent Authorization Announcement No. CN209363186U which discloses an online automatic purging device for copper pipes. The patent uses an air compressor to inflate and inflate the inflatable sealing ring to hold the copper pipe tightly, and then use a nitrogen preparation device to purify the copper pipe. Purge to achieve automatic purging effect, but the inflatable sealing ring of this patent needs to operate two steps of air intake and exhaust, which will cause insufficient rebound of the inflatable sealing ring in the case of continuous production, and there are also existing technologies. The problem.

Utility model content

The purpose of this utility model is to aim at the above-mentioned deficiencies and defects of the prior art, and to provide an on-line automatic purging device for copper pipes to solve the above-mentioned problems.

The technical problem solved by the present utility model can be realized by the following technical solutions:

An on-line automatic purging device for copper pipes is characterized in that it comprises a casing, a cylindrical sealing cavity for inserting copper pipes is formed in the casing, and one end of the cylindrical sealing cavity is located in the casing The side part of the cylindrical sealing cavity is formed as a copper pipe insertion opening, the other end of the cylindrical sealing cavity is closed, and a cylindrical sealing cavity is formed in the side part of the cylindrical sealing cavity in the casing. A connected annular sealing cavity, the annular sealing cavity is slidably arranged with a piston for compressing the seal to hold the copper tube, and the casing is respectively provided with a first for air intake or exhaust of compressed air. A compressed air port, a second compressed air port, and a nitrogen inlet provided on the casing for entering nitrogen.

In a preferred embodiment of the present invention, the casing is further provided with a bell mouth to prevent the seal from flying out during compression, the bell mouth is provided with an annular groove, and the casing is provided with a set screw Connect with the annular groove of the bell mouth.

In a preferred embodiment of the present utility model, the piston is provided with a plurality of sealing gaskets for preventing gas from being trapped.

In a preferred embodiment of the present invention, several sealing gaskets are arranged between the casing and the bell mouth.

In a preferred embodiment of the present invention, the sealing member is a sealing ring, and the sealing ring is arranged in the annular sealing cavity and located at one end of the piston.

Due to the adoption of the above technical solutions, the beneficial effects of the present utility model are: compared with the prior art, the present utility model can withstand nitrogen purging with a relatively large pressure. 2. The sealing ring is more durable and low in cost, which reduces the number of times the worker needs to replace the seal. 3. The structure is compact and can be implemented in a small space.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of the prior art.

Figure 2 is a schematic structural diagram of a copper pipe online automatic purging device of the present invention.

detailed description

In order to make it easy to understand the technical means, creation features, achievement goals and effects realized by the present invention, the present invention is further described below.

Referring to an online automatic purging device for copper pipes shown in FIG. 2 , it includes a casing 100, and a cylindrical sealing cavity 100a for inserting the copper pipe 1 is formed in the casing 100. One end of the cylindrical sealing cavity 100a is located at The side part of the casing 100 is formed as a copper pipe insertion port 101, the other end of the cylindrical sealing cavity 100a is closed, and a cylindrical sealing cavity 100a is formed in the casing 100 at the side part of the cylindrical sealing cavity 100a. The annular sealing cavity 100b communicated with the cavity 100a is slidably disposed on the annular sealing cavity 100b with a piston 300 for compressing the sealing member 200 to hold the copper tube 1 tightly. The sealing member 200 in this embodiment is preferably a sealing ring, and the sealing ring 200 is disposed in the annular sealing cavity 100b and located at one end of the piston 300 . Specifically, the piston 300 can move left and right in the annular sealing cavity 100b. The casing 100 is provided with a first compressed air port 110 and a second compressed air port 120 for supplying or exhausting compressed air, and a nitrogen inlet 130 provided on the casing 100 for entering nitrogen. The working process is as follows: when the second compressed air port 120 takes in the first compressed air 110 and exhausts it, and under the action of the compressed air, the piston 300 is moved to the left without pressing the seal 200. At this time, the copper tube 1 is inserted from the copper tube. The port 101 penetrates into the cylindrical sealing cavity 100a. At this time, the first compressed air port 110 takes in the second compressed air 120 and exhausts it, and under the action of the compressed air, the piston 300 is moved to the right to compress the seal 200. , so that the sealing member 200 is deformed and compressed inward to hold the copper tube 1 tightly, and then nitrogen is introduced through the nitrogen inlet 130 to purge the inner wall of the copper tube 1. After purging for a certain period of time, the purging ends, and the second compressed air port 120 The first compressed air 110 is taken in and exhausted, and under the action of the compressed air, the piston 300 is moved to the left without pressing the seal 200, so that the seal 200 rebounds and restores its original shape, and finally the copper tube 1 is pulled out.

In order to prevent the piston compression seal from flying out, a bell mouth 400 is arranged in the casing 100 , and an annular groove 401 is arranged on the bell mouth 400 .

In order to prevent the gas from being trapped during the working process, a plurality of sealing gaskets 20 are arranged on the piston 300 . Several sealing gaskets 30 are arranged between the casing 100 and the bell mouth 400 .

The working principle of the present invention is as follows: the second compressed air port 120 enters the compressed air and the first compressed air 110 is exhausted, and under the action of the compressed air, the piston 300 is moved to the left without pressing the seal 200, and then the copper pipe 1 The copper pipe insertion port 101 penetrates into the cylindrical sealing cavity 100a. At this time, the first compressed air port 110 enters the compressed air and the second compressed air 120 exhausts, and the piston 300 moves to the right under the action of the compressed air. Press the sealing member 200 to deform the sealing member 200 to compress the copper tube 1 inwardly, and then pass nitrogen through the nitrogen inlet 130 to purge the inner wall of the copper tube 1. After purging for a certain period of time, the purging ends, and the first The second compressed air port 120 enters the compressed air. The first compressed air 110 is exhausted. Under the action of the compressed air, the piston 300 is moved to the left without pressing the sealing member 200, so that the sealing member 200 rebounds and restores its original shape. 1 Pull out. In addition, the addition of the bell mouth 400 can prevent the piston 300 from flying out when the seal 200 is compressed.

The basic principles, main features and advantages of the present invention have been shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention There will also be various changes and improvements in the new model, which all fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims

An on-line automatic purging device for copper pipes is characterized in that it comprises a casing, a cylindrical sealing cavity for inserting copper pipes is formed in the casing, and one end of the cylindrical sealing cavity is located in the casing The side part of the cylindrical sealing cavity is formed as a copper pipe insertion opening, the other end of the cylindrical sealing cavity is closed, and a cylindrical sealing cavity is formed in the side part of the cylindrical sealing cavity in the casing. A connected annular sealing cavity, the annular sealing cavity is slidably arranged with a piston for compressing the seal to hold the copper tube, and the casing is respectively provided with a first for air intake or exhaust of compressed air. A compressed air port, a second compressed air port, and a nitrogen inlet provided on the casing for entering nitrogen.
The on-line automatic purging device for copper pipes according to claim 1, wherein a bell mouth is further provided in the casing to prevent the seal from flying out during compression, and a ring-shaped mouth is arranged on the bell mouth. The casing is connected with the annular groove of the bell mouth through a set screw.
The on-line automatic purging device for copper pipes according to claim 1, characterized in that, a plurality of sealing gaskets are arranged on the piston to prevent gas from being trapped.
The on-line automatic purging device for copper pipes according to claim 1, wherein a plurality of sealing gaskets are arranged between the casing and the bell mouth.
The online automatic purging device for copper pipes according to claim 1, wherein the sealing member is a sealing ring, and the sealing ring is arranged in the annular sealing cavity and is located at one end of the piston.