CN209763837U - Quick-insertion U-shaped pipe for fin pipe connection - Google Patents

Abstract

The utility model discloses a fin union coupling is with inserting U type pipe soon, including U type pipe, U type pipe straight tube lower extreme is connected with the screwed pipe, and the screwed pipe lower extreme is connected with inner tube and rubber outer tube, and the cover is equipped with fastening pipe on the screwed pipe, fastening pipe top be equipped with the nut, institute nut and screwed pipe threaded connection. The utility model discloses simple structure, convenient operation can directly be connected two finned tubes, need not the welding, and the convenience does not have welding condition's local construction in open air etc. connects fastening, leakproofness good.

Description

Quick-insertion U-shaped pipe for fin pipe connection

Technical Field

the utility model belongs to a U type pipe, concretely relates to fin union coupling is with inserting U type pipe soon.

Background

The finned tube is a heat exchange element. In order to improve the heat exchange efficiency, fins are usually added on the surface of the heat exchange tube to increase the external surface area (or internal surface area) of the heat exchange tube, thereby achieving the purpose of improving the heat exchange efficiency. The finned tubes are often combined together, two finned tubes are connected through a U-shaped tube, the U-shaped tube and the finned tubes are fastened through a welding method at present, and in order to ensure welding quality and avoid leakage points, flaw detection needs to be carried out on welding seams after welding.

SUMMERY OF THE UTILITY MODEL

the to-be-solved technical problem of the utility model is: overcome prior art's not enough, provide a fin union coupling with inserting U type pipe soon, the utility model discloses simple structure, convenient operation can be directly connect two finned tubes, need not the welding, and the convenience does not have the local construction of welding condition in open air etc. and connect fastening, leakproofness are good.

The utility model provides a technical scheme that the problem that its exists was solved adopted is:

the utility model provides a finned tube connects with inserting U type pipe soon, includes the U type pipe, the U type pipe include return bend and return bend both sides below straight tube, U type pipe straight tube lower extreme is connected with the screwed pipe, the screwed pipe be the external screw thread.

The threaded pipe lower extreme be connected with the inner tube, the inner tube external diameter be less than the threaded pipe internal diameter, the inner tube outside cover be equipped with the rubber sleeve.

The rubber sleeve is characterized in that the lower end of the threaded pipe is further connected with a rubber outer pipe, the outer diameter of the rubber outer pipe is larger than that of the threaded pipe, the rubber outer pipe is sleeved outside the rubber sleeve, and a gap between the rubber outer pipe and the rubber sleeve is an insertion cavity.

The screwed pipe on the cover be equipped with fastening pipe, fastening intraductal diameter be less than the external diameter of rubber outer tube, fastening pipe lower extreme be equipped with horn mouth II, II bottom surfaces diameters of horn mouth be greater than the rubber outer tube external diameter.

The fastening pipe top be equipped with the nut, fastening pipe upper end wear to establish to the nut inside, fastening pipe upper end be equipped with spacing carousel, nut and screwed pipe threaded connection.

Preferably, the tail end of the lower part of the inner pipe is provided with a bell mouth I.

Preferably, the rubber sleeve is uniformly sleeved with a plurality of rubber rings, the rubber rings are fixedly connected with the rubber sleeve, and the circumferential surface of each rubber ring is in contact with the inner wall of the outer rubber pipe.

Compared with the prior art, the utility model discloses beneficial effect who has:

(1) Through the cooperation between rubber sleeve, rubber outer tube, the fastening pipe, U type pipe and finned tube fastening connection, convenient operation.

(2) Welding is not needed, and construction is facilitated under the condition of no welding condition.

Drawings

the present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a view showing the appearance of a quick-insertion U-shaped tube for connecting fin tubes according to the present invention,

Figure 2 is the internal structure view of the utility model,

Figure 3 is a partial view of the leg of the utility model,

FIG. 4 is an enlarged view of the utility model at A,

FIG. 5 is an enlarged view of the position B of the present invention,

fig. 6 is an enlarged view of the position C of the present invention.

In the figure, 1-U-shaped pipe and 1 a-threaded pipe;

2-inner tube, 2 a-bell mouth I;

3-rubber sleeve, 3 a-rubber ring;

4-rubber outer tube;

5-inserting into the cavity;

6-fastening tube, 6 a-bell mouth II, 6 b-limit turntable;

7-nut.

Detailed Description

the attached drawings are the best embodiments of the quick-plug U-shaped pipe for fin pipe connection, and the invention is further described in detail with reference to the attached drawings.

specific example 1:

As shown in the attached figure 2, the quick-plug U-shaped pipe for connecting the finned pipes comprises a U-shaped pipe 1. U type pipe 1 include return bend and return bend both sides below straight tube, U type pipe 1 straight tube lower extreme is connected with screwed pipe 1a, screwed pipe 1a be the external screw thread.

The lower end of the threaded pipe 1a is connected with an inner pipe 2, the outer diameter of the inner pipe 2 is smaller than the inner diameter of the threaded pipe 1a, and a bell mouth I2 a (shown in attached figure 4) is arranged at the tail end below the inner pipe 2. The outer side of the inner tube 2 is sleeved with a rubber sleeve 3.

The lower end of the threaded pipe 1a is further connected with a rubber outer pipe 4, the outer diameter of the rubber outer pipe 4 is larger than that of the threaded pipe 1a, the rubber outer pipe 4 is sleeved outside the rubber sleeve 3, and a gap between the rubber outer pipe 4 and the rubber sleeve 3 is an insertion cavity 5.

Threaded pipe 1a go up the cover and be equipped with fastening pipe 6, fastening pipe 6 internal diameter be less than the external diameter of rubber outer tube 4, 6 lower extremes of fastening pipe be equipped with II 6a of horn mouth (shown by figure 5), II 6a bottom surface diameter of horn mouth be greater than 4 external diameters of rubber outer tube.

as shown in fig. 6, a nut 7 is arranged above the fastening tube 6, the upper end of the fastening tube 6 penetrates through the nut 7, and a limiting rotary disc 6b is arranged at the upper end of the fastening tube 6. Spacing carousel 6a avoids fastening pipe 6 to break away from nut 7, guarantees simultaneously that fastening pipe 6 rotates with nut 7 to be connected. The nut 7 is in threaded connection with the threaded pipe 1 a.

When the finned tube fastening device is used, the straight tube at the upper end of the finned tube is inserted into the insertion cavity 5, and then the nut 7 is rotated, so that the nut 7 moves downwards, and the fastening tube 6 is pushed to move downwards. Through horn mouth II 6a, fastening pipe 6 covers on rubber outer tube 4, because fastening pipe 6 internal diameter is less than 4 external diameters of rubber outer tube, consequently, fastening pipe 6 inwards extrudees rubber outer tube 4, further reduces the internal diameter of rubber outer tube 4 for rubber outer tube 4 presss from both sides the finned tube upper end straight tube with rubber sleeve 3 together tightly, guarantees good leakproofness simultaneously.

Specific example 2:

Rubber sleeve 3 on evenly overlap and be equipped with a plurality of rubber circle 3a, rubber circle 3a and 3 fixed connection of rubber sleeve, 3a periphery of rubber circle contact with 4 inner walls of rubber outer tube. Like this, when inserting chamber 5 inside if finned tube upper end straight tube, finned tube upper end straight tube drives rubber circle 3a slope, increase rubber circle 3a and finned tube upper end straight tube area of contact, further optimize sealed and fastening effect. The structure of this embodiment is otherwise not described as the structure in embodiment 1.

the embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art.

Claims (3)

1. the utility model provides a fin union coupling is with inserting U type pipe soon, includes U type pipe (1), its characterized in that:

The U-shaped pipe (1) comprises an elbow pipe and straight pipes below two sides of the elbow pipe, the lower end of the straight pipe of the U-shaped pipe (1) is connected with a threaded pipe (1a), the threaded pipe (1a) is an external thread,

the lower end of the threaded pipe (1a) is connected with an inner pipe (2), the outer diameter of the inner pipe (2) is smaller than the inner diameter of the threaded pipe (1a), the outer side of the inner pipe (2) is sleeved with a rubber sleeve (3),

the lower end of the threaded pipe (1a) is also connected with a rubber outer pipe (4), the outer diameter of the rubber outer pipe (4) is larger than that of the threaded pipe (1a), the rubber outer pipe (4) is sleeved outside the rubber sleeve (3), a gap between the rubber outer pipe (4) and the rubber sleeve (3) is an insertion cavity (5),

the threaded pipe (1a) is sleeved with a fastening pipe (6), the inner diameter of the fastening pipe (6) is smaller than the outer diameter of the rubber outer pipe (4), the lower end of the fastening pipe (6) is provided with a bell mouth II (6a), the diameter of the bottom surface of the bell mouth II (6a) is larger than the outer diameter of the rubber outer pipe (4),

Fastening pipe (6) top be equipped with nut (7), fastening pipe (6) upper end wear to establish to inside nut (7), fastening pipe (6) upper end be equipped with spacing carousel (6b), nut (7) and screwed pipe (1a) threaded connection.

2. the quick-insertion U-shaped tube for fin tube connection according to claim 1, wherein:

the tail end of the lower part of the inner tube (2) is provided with a bell mouth I (2 a).

3. the quick-insertion U-shaped tube for fin tube connection according to claim 1, wherein:

Rubber sleeve (3) on evenly overlap and be equipped with a plurality of rubber circle (3a), rubber circle (3a) and rubber sleeve (3) fixed connection, rubber circle (3a) periphery and rubber outer tube (4) inner wall contact.