CN220770460U - Gas collecting tube assembly - Google Patents

Abstract

The application discloses gas collecting tube assembly, including main gas collecting tube, connecting pipe, main gas collecting tube includes first pipe fitting and second pipe fitting, first pipe fitting with second pipe fitting welded connection, first pipe fitting includes the expanded diameter section, the lateral wall face of expanded diameter section is provided with the switching portion, the connecting pipe with switching portion welded connection sets up like this and can reduce the solder joint quantity of gas collecting tube assembly to can reduce the processing cost, further can improve welding quality, reduce the risk of leakage.

Description

Gas collecting tube assembly

[ field of technology ]

The application relates to the technical field of pipeline connection, such as may relate to a gas collecting tube assembly in the field of refrigeration.

[ background Art ]

Products in the technical field of refrigeration comprise an air conditioner, a refrigerator, an ice chest and the like, a tee joint part is used as a connecting device commonly used when connecting pipeline parts in the refrigeration field, but when the tee joint part is connected with other pipeline parts, three welding parts possibly leak refrigerants due to poor welding, and the more welding points are leaked, the greater the risk is, so that serious quality hidden danger can be caused for the operation of a refrigeration system.

[ utility model ]

Aiming at the defects or shortcomings, the utility model provides a gas collecting tube assembly, which comprises the following specific technical scheme:

the application discloses gas collecting tube assembly, including main gas collecting tube, connecting pipe, main gas collecting tube includes first pipe fitting and second pipe fitting, first pipe fitting with second pipe fitting welded connection, first pipe fitting includes the expanded diameter section, the lateral wall face of expanded diameter section is provided with the switching portion, the connecting pipe with switching portion welded connection.

The technical effect of this application lies in: compare the gas collecting tube subassembly that utilizes three way component to realize being connected between the three pipeline spare, the gas collecting tube subassembly that this application provided can reduce solder joint quantity to can reduce processing cost, further can improve welding quality, reduce the risk of leakage.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required for the description of the embodiments or exemplary techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic perspective view of a header assembly;

FIG. 2 is a partial cross-sectional view of a header assembly;

FIG. 3 is an enlarged schematic view of section I of FIG. 2;

FIG. 4 is an enlarged schematic view of section II of FIG. 2;

FIG. 5 is a schematic perspective view of a first tube;

FIG. 6 is a perspective view of a first tubular member;

FIG. 7 is a cross-sectional view of the first tube member;

FIG. 8 is a perspective view of a connecting tube;

FIG. 9 is a perspective view of a second tube;

[ reference numerals ]

100. A gas collecting tube assembly; 4. a branch pipe; 1. a first pipe fitting; 2. a second pipe fitting; 3. a connecting pipe; 11. a first pipe section; 12. an expanding section; 13. a reducing section; 121. a switching part; 31. a first connection end; 14. a flaring transition section; 15. a necking transition section; 1211. a second connection end; 122. an opening portion; 16. an inner cavity; 32. a connection port; 123. an opening edge portion;

[ detailed description ] of the utility model

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

Products in the technical field of refrigeration comprise an air conditioner, a refrigerator, a freezer and the like, the tee joint part is used as a connecting device commonly used when connecting pipeline parts in the refrigeration field, but three welding spots are formed when the tee joint part is connected with other pipeline parts, so that the cost is high, the more the welding spots are, the greater the risk of leakage is, and serious quality hidden danger can be caused for the operation of a refrigeration system.

Referring to fig. 1-9, the present application provides a gas collecting tube assembly, where the gas collecting tube assembly 100 includes a main gas collecting tube, a connecting tube 3, and a plurality of branch tubes 4 connected with a sidewall of the main gas collecting tube, the main gas collecting tube is connected with the plurality of branch tubes 4 by welding, and a material of the main gas collecting tube may be steel material, aluminum material, or copper material; the material of the branch pipe 4 can be steel material, aluminum material and copper material; the material of the connecting pipe 3 may be steel, aluminum or copper. The material of the branch pipe 4 may be the same as or different from that of the main header. The material combination of each part in the gas collecting tube assembly is preferably as follows: the main gas collecting tube is made of steel material, and the branch tube 4 and the connecting tube 3 are made of copper material. Thus, the cost can be reduced, and the use of copper materials can be reduced. The main gas collecting tube comprises a first tube fitting 1 and a second tube fitting 2, the first tube fitting 1 is in welded connection with the second tube fitting 2, the first tube fitting 1 comprises an expanding section 12, a switching part 121 is arranged on the side wall surface of the expanding section 12, and a connecting tube 3 is in welded connection with the switching part 121. Specifically, the first pipe fitting 1 is an integral part, the first pipe fitting 1 further comprises a first pipe section 11 and a diameter reduction section 13, one end of the diameter expansion section 12 is connected with the first pipe section 11, the other end is connected with the diameter reduction section 13, and the second pipe fitting 2 is welded and fixed with the diameter reduction section 13. Like this set up, compare the gas collecting tube subassembly that utilizes three piping components to realize being connected between the three piping components, the gas collecting tube subassembly that this application provided can reduce the solder joint quantity to can reduce processing cost, further can improve welding quality, reduce the risk of leakage.

It should be noted that, the adaptor 121 herein refers to a protruding portion protruding from a circumferential sidewall of the expanding section 12, and may be a flanging structure formed by a flanging shaping process. Specifically, the adaptor 121 is radially protruded along the circumferential side wall of the expanded section 12, and may be formed by a flanging process, and preferably the adaptor 121 is radially protruded outwardly along the circumferential side wall of the expanded section 12. The adapter 121 includes a second connection end 1211, the connection pipe 3 includes a first connection end 31, and the adapter 121 and the connection pipe 3 are connected by welding at a mating portion of the first connection end 31 and the second connection end 1211; further, in order to increase the welding area between the adapter part 121 and the connection pipe 3, thereby improving the welding quality therebetween and reducing the risk of leakage, the radial protrusion height of the adapter part 121 may be set to 1mm or more, preferably, 2-3mm. The protruding height of the adapting portion 121 cannot be too large, and the flange portion is broken too large to be easily molded due to the limitation of the flange process and the influence of material deformation.

The circumferential side wall surface of the expanding section 12 is provided with an opening 122, the adapting part 121 is formed by radially flanging the opening 122 along the side wall surface of the expanding section 12, the connecting pipe 3 comprises a first connecting end part 31, the adapting part 121 comprises a second connecting end part 1211, the first connecting end part 31 is welded with the second connecting end part 1211, the first connecting end part 31 penetrates through an inner hole of the adapting part 121 to be inserted into the expanding section 12, the first connecting end part 31 and the adapting part 121 are in interference fit, and the pre-positioning can be carried out before welding. Further, the distal end of the first connection end portion 31 exceeds the opening edge portion 123, the first tube member 1 includes the inner cavity 16, the first connection end portion 31 includes the connection port 32, and the inner cavity 16 communicates with the connection port 32. Specifically, when at least part of the connection pipe 3 is located in the adapter 121, the extension length of the connection pipe 3 refers to the length of the connection pipe 3 extending into the adapter 121 in the axial direction of the adapter 121, the extension length of the connection pipe 3 is equal to or greater than three times the wall thickness of the connection pipe 3 or the adapter 121, and/or the extension length of the connection pipe 3 is equal to or greater than 60% of the equivalent diameter of the adapter 121 or the connection pipe 3. The extending length is relatively larger, so that the strength of the connection pipe 3 and the adapting part 121 which are mutually abutted against and connected is relatively better, the connection is more reliable in comparison with a shallower inserting mode, and compared with the case of over-deep inserting, the refrigerant flowing resistance of the extending part of the connection pipe 3 to the inside of the first pipe fitting 1 can be reduced, and the fluid can normally circulate between the first pipe fitting 1 and the second pipe fitting 2. Further, the refrigerant enters through the connecting pipe 3 and then is split into the first pipe fitting 1 and the second pipe fitting 2, for uniform split, the axis of the adaptor 121 is preferably perpendicular to the axis of the expanding section 12, the axis of the adaptor 121 further intersects with the axis of the expanding section 12, and further, two ends of the expanding section 12 are symmetrically arranged relative to the axis of the adaptor 121.

Referring to fig. 6, the first pipe fitting 1 further includes a flaring transition section 14 and a necking transition section 15, the flaring transition section 14 is disposed between the first pipe section 11 and the expanding section 12, and the necking transition section 15 is disposed between the expanding section 12 and the necking section 13; in this embodiment, the first pipe section 11, the second pipe section 2, and the connecting pipe 3 are equal diameter pipes, in order to process the adaptor 121 matching with the connecting pipe 3, it is necessary to perform flaring processing on the first pipe section 1 to form the expanded diameter section 12, process the opening 122 on the side wall surface of the expanded diameter section 12, and then perform flanging and shaping on the opening 122 to obtain the adaptor 121, if the adaptor is directly processed on the first pipe section 1, only the adaptor with smaller size can be processed due to the limitation of the size, and the adaptor cannot be matched with the connecting pipe 3 with the same diameter as the first pipe section 11. Meanwhile, in order to enable the second pipe fitting 2 and the connecting pipe 3 with the same diameter as the first pipe section 11 to be connected with the first pipe fitting 1, the flaring angle alpha of the flaring transition section 14 needs to be smaller than the necking angle beta of the necking transition section 15; preferably, the flaring angle single-side angle is 15-20 degrees, and the necking angle single-side angle is 20-30 degrees; the axial length L1 of the flared transition 14 is greater than the axial length L2 of the necked transition 15.

The flaring and necking angles are described herein: referring to fig. 6, a flaring and necking process is performed on one end of the first pipe fitting 1 to form a flaring transition section 14 and a necking transition section 15 of a conical surface, and in fig. 6, angles between projection lines of the conical surface and an axis of the first pipe fitting 1 are respectively a flaring angle a and a necking angle β.

Further, referring to fig. 6-9, the outer diameter of the first pipe segment 11 is defined as d1; defining the outer diameter of the expanded section 12 as d2 and defining the inner diameter of the expanded section 12 as d3; defining the outer diameter of the connecting pipe 3 as d4; defining the outer diameter of the reducing section 13 as d5, defining the inner diameter of the reducing section 13 as d6, and defining the outer diameter of the second pipe 2 as d7, wherein the first pipe section 11, the second pipe 2 and the connecting pipe 3 are equal diameter pipes, that is, d1=d4=d6=d7, in order to connect three equal diameter pipes, it is required to satisfy the following conditions: d2 > d5 > d1. Further, as can be seen from the processing method of the adaptor 121, firstly, the opening 122 is processed on the side wall of the expanded section 12, then the opening 122 is turned and shaped to obtain the adaptor 121, the outer diameter d4 of the connecting pipe 3 is the same as the outer diameter d1 of the first pipe section 11, the adaptor 121 capable of being in interference fit with the connecting pipe 3 is to be processed, and the diameter of the inner hole of the adaptor 121 is equal to the outer diameter d4 of the connecting pipe 3, so that at least: the inner diameter d3 of the expanding section 12 is larger than or equal to 1.15 times of the outer diameter d4 of the connecting pipe 3, namely, d3 is larger than or equal to 1.15d4.

In the prior art, when a tee part is used for connecting a pipeline, the tee part can be obtained by processing in a hydraulic bulging mode, and the hydraulic bulging of the tee is a forming process for axially compensating a bulging branch pipe through a metal material. The three-way component manufactured by the process has low manufacturing precision of the interface part, adopts clearance fit when being connected with a pipeline component, is integrally processed in a flame brazing mode, has three welding spots, and has poor welding consistency and low quality stability. The first pipe fitting 1 that this application provided, machining precision is relatively higher, and adapter 121 and connecting pipe 3 cooperation mode, reducing section 13 and second pipe fitting 2 cooperation mode can adopt interference fit, can fix in advance before welding process, then carries out tunnel furnace welding or high temperature box welding with assembled gas collecting tube subassembly semi-manufactured goods, can not only reduce a solder joint like this, has reduced leakage risk, has still improved the uniformity of welding seam relatively, and welding quality and stability improve relatively.

The gas collecting tube assembly 100 further comprises a plurality of branch tubes 4 communicated with the side wall of the main gas collecting tube, and the diameter of each branch tube 4 is smaller than that of the first tube segment 11, so that a flanging part can be directly machined on the side wall surface of the first tube fitting 1 and used for being welded with the branch tube 4, and the matching connection mode of the branch tube 4 and the flanging part is the same as that of the connecting tube 3 and the adapting part 121, and is not described in detail herein.

It should be noted that: the above embodiments are only for illustrating the present utility model and not for limiting the technical solutions described in the present utility model, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present utility model can be modified, combined or substituted by equivalent, and all technical solutions and modifications thereof without departing from the spirit and scope of the present utility model are intended to be covered in the scope of the claims of the present utility model.

Claims (10)

1. The utility model provides a gas collecting tube subassembly, includes main gas collecting tube, connecting pipe (3), main gas collecting tube includes first pipe fitting (1) and second pipe fitting (2), first pipe fitting (1) with second pipe fitting (2) welded connection, its characterized in that: the first pipe fitting (1) comprises an expanded diameter section (12), a switching part (121) is arranged on the side wall surface of the expanded diameter section (12), and the connecting pipe (3) is connected with the switching part (121) in a welding mode.

2. A header assembly according to claim 1, wherein: the first pipe fitting (1) is an integral piece, the first pipe fitting (1) comprises a first pipe section (11) and a diameter reduction section (13), one end of the diameter expansion section (12) is connected with the first pipe section (11), the other end of the diameter expansion section is connected with the diameter reduction section (13), and the second pipe fitting (2) is fixedly welded with the diameter reduction section (13).

3. A header assembly according to claim 2, wherein: the transfer part (121) radially protrudes along the circumferential side wall of the expanding section (12), and the transfer part (121) is of a flanging structure.

4. A header assembly according to claim 3, wherein: the circumferential side wall of the expanding section (12) is provided with an opening part (122), the opening part (122) comprises an opening edge part (123), the adapting part (121) is formed by radially flanging the opening part (122) along the side wall surface of the expanding section (12), the connecting pipe (3) comprises a first connecting end part (31), the adapting part (121) comprises a second connecting end part (1211), the first connecting end part (31) is in welded connection with the second connecting end part (1211), the first connecting end part (31) penetrates through the adapting part (121) to be inserted into the expanding section (12), the tail end of the first connecting end part (31) exceeds the opening edge part (123), the first pipe fitting (1) comprises an inner cavity (16), the first connecting end part (31) comprises a connecting port (32), and the inner cavity (16) is communicated with the connecting port (32).

5. The header assembly of claim 4, wherein: the axis of the switching part (121) is perpendicular to the axis of the expanding section (12), and the axis of the switching part (121) is intersected with the axis of the expanding section (12).

6. A header assembly according to any one of claims 2 to 5, wherein: a flaring transition section (14) is arranged between the first pipe section (11) and the expanding section (12), and a necking transition section (15) is arranged between the expanding section (12) and the necking section (13);

the flaring angle alpha of the flaring transition section (14) is smaller than the necking angle beta of the necking transition section (15); the axial length L1 of the flaring transition section (14) is greater than the axial length L2 of the necking transition section (15).

7. The header assembly of claim 6, wherein: defining the inner diameter of the expanding section (12) as d3 and the outer diameter of the connecting pipe (3) as d4, the requirements are as follows: d3 1.15d4.

8. The header assembly of claim 7, wherein: defining the outer diameter of the first pipe section (11) as d1; defining the outer diameter of the expanding section (12) as d2; defining the outer diameter d5 and the inner diameter d6 of the diameter-reducing section (13); defining the outer diameter of the second pipe (2) as d7, the following needs to be satisfied: d2 > d5 > d1, d1=d4=d6=d7.

9. The header assembly of claim 8, wherein: the gas collecting tube assembly further comprises a plurality of branch tubes (4), the first tube fitting (1) and the second tube fitting (2) are steel tube fittings, and the connecting tube (3) and the branch tubes (4) are copper tube fittings.

10. A header assembly according to claim 9, wherein: the first pipe fitting (1) and the second pipe fitting (2), and the switching part (121) and the connecting pipe (3) are welded by adopting a furnace welding or a high-temperature oven.