CN209800942U

CN209800942U - Manifold branch

Info

Publication number: CN209800942U
Application number: CN201920481312.7U
Authority: CN
Inventors: 魏建
Original assignee: Hanshan Ruike Metal Co Ltd
Current assignee: Hanshan Ruike Metal Co Ltd
Priority date: 2019-04-10
Filing date: 2019-04-10
Publication date: 2019-12-17
Anticipated expiration: 2029-04-10

Abstract

The utility model provides a branch pipe, it includes branch pipe body and first takeover. The branch pipe body is integrally formed after being extruded by a pipe fitting, the branch pipe body comprises an extruded main pipe formed by extrusion and two branch pipes respectively communicated with the extruded main pipe, and the length of the extruded main pipe is greater than or equal to 0.8 time of the pipe diameters of the branch pipes; the length of the extrusion main pipe is the vertical distance from the intersection of the center line of the extrusion main pipe and the center lines of the two branch pipes to the end part of the input end of the extrusion main pipe. The first connecting pipe is connected with the input end of the extrusion main pipe in a welding mode.

Description

Manifold branch

Technical Field

The utility model relates to a pipe fitting for refrigeration, and in particular to branching pipe.

Background

The branch pipe is a connecting pipe which is used for dividing one medium input into two or more medium outputs in the refrigeration pipeline. The branch pipe used in the traditional refrigeration equipment pipeline installation system is generally of two types, the first type is formed by welding a plurality of pipe fittings, and the branch pipe of the structure is provided with at least three welding seams. The pressure of the refrigerant in the piping in a refrigeration unit installation system is generally high, and more welds mean a greater probability of product leakage. The second type is an integrated pipe fitting, which is difficult to process and requires filling a medium in a product before processing, and lead or other toxic substances are mainly used to seriously pollute the environment.

In order to solve the problems of low safety performance or difficult processing technology of the traditional branch pipe, a branch pipe manufactured by adopting a stamping method is proposed, and the manufacturing process mainly comprises the following steps: punching and flanging the middle part of the pipe blank by a punching die to form a main pipe welding hole, then bending the main pipe welding hole to form a branch pipe, and finally welding a connecting pipe on the main pipe welding hole to form a branch pipe. Although the branch pipe formed by the manufacturing process has low processing difficulty and few welding points, the height of the main pipe hole formed by flanging is compensated by the radial flow of the material of the pipe blank, so that the flanging height of the main pipe welding hole after flanging is very short and is far smaller than the diameter of the pipe blank (for example, the height of the main pipe welding hole formed by flanging of a pipe blank with the pipe diameter of 16 mm is only 2.5 mm). When the connecting pipe and the main pipe are welded, the welding strength is very low due to the short welding matching length, and if the branch pipe with the structure is applied to an air conditioning unit, the welded part is easy to be detached or the welding line is easy to crack during installation and construction, so that the serious result of pipeline burst is directly caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome the branch manifold resistance to compression bearing power poor, the high problem of leakage incidence that current punching press formula formed, provide a branch manifold that the welding point is few, compressive strength is big.

In order to achieve the above object, the present invention provides a manifold, which comprises a manifold pipe body and a first connecting pipe. The branch pipe body is integrally formed after being extruded by a pipe fitting, the branch pipe body comprises an extruded main pipe formed by extrusion and two branch pipes respectively communicated with the extruded main pipe, and the length of the extruded main pipe is greater than or equal to 0.8 time of the pipe diameters of the branch pipes; the length of the extrusion main pipe is the vertical distance from the intersection of the center line of the extrusion main pipe and the center lines of the two branch pipes to the end part of the input end of the extrusion main pipe. The first connecting pipe is connected with the input end of the extrusion main pipe in a welding mode.

According to the utility model discloses an embodiment, the pipe diameter that the extrusion was responsible for is greater than or equal to the pipe diameter of reposition of redundant personnel branch pipe.

According to the utility model discloses an embodiment, the branch manifold body is still including being formed at the extrusion and being responsible for and each reposition of redundant personnel branch pipe between and have spherical curved surface's changeover portion.

According to an embodiment of the present invention, the wall thickness of the transition section is greater than or equal to the wall thickness of the other portions of the branch pipe body.

according to the utility model discloses an embodiment, in the branch manifold body, two reposition of redundant personnel branch pipes all are greater than the length of second reposition of redundant personnel branch pipe to the crooked and first reposition of redundant personnel branch pipe of the output direction that the extrusion is responsible for, and length is the crossing department to the perpendicular distance of corresponding reposition of redundant personnel branch pipe output tip of the central line of two reposition of redundant personnel branch pipes.

According to the utility model discloses an embodiment, first reposition of redundant personnel branch pipe includes first crooked section, first straight section and is formed at the terminal first linkage segment of first straight section, and second reposition of redundant personnel branch pipe includes the crooked section of second and is formed at the terminal second linkage segment of the crooked section of second.

According to the utility model discloses an embodiment, the branch pipe still includes the second takeover with second linkage segment welded connection.

According to an embodiment of the present invention, the first connecting section and the second connecting section each include at least one flared connecting portion or at least one necked connecting portion.

According to the utility model discloses an embodiment, the straight body length that the extrusion was responsible for is greater than or equal to 0.4 times of each reposition of redundant personnel branch pipe diameter.

According to an embodiment of the utility model, the input of first takeover has at least one flaring connecting portion or at least one throat connecting portion, and the output of second takeover has at least one flaring connecting portion or at least one throat connecting portion. According to the utility model discloses an embodiment, the pipe diameter that the extrusion was responsible for is greater than or equal to the pipe diameter of reposition of redundant personnel branch pipe.

According to the utility model discloses an embodiment, first reposition of redundant personnel branch pipe includes first crooked section, first straight section and forms in the terminal first linkage segment of first straight section, and second reposition of redundant personnel branch pipe includes the straight section of second crooked section, second and forms in the terminal second linkage segment of the straight section of second.

To sum up, the utility model provides a branch manifold body forms the extrusion after through the extrusion and is responsible for and two reposition of redundant personnel branch pipes, and the length that the extrusion was responsible for is more than or equal to 0.8 times the pipe diameter of reposition of redundant personnel branch pipe. In the branch pipe of this structure, the length of extrusion person in charge is very long, so has very long welding cooperation length when it carries out welded connection with first takeover, not only makes things convenient for the welding and the welding back product has fine firmness, and resistance to compression holding capacity is big. Furthermore, because the branch pipe body is integrally formed, the finally formed branch pipe has few welding lines, and the safety of the product is further improved.

In addition, in the branch pipe body after extrusion forming, the pipe wall thickness of the transition section connecting the extrusion main pipe and each branch pipe is larger than or equal to the pipe wall thickness of other parts of the branch pipe body, and the larger the pipe wall thickness is, the stronger the pressure bearing capacity is. The event the utility model provides a whole fine bearing capacity that has of branch pipe, the product leakage rate is low, and the safety in utilization is high.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic structural diagram of a branch pipe according to an embodiment of the present invention.

Fig. 2 is a schematic view of the manifold body of fig. 1.

fig. 3 is an enlarged schematic view of a portion a of fig. 2.

FIG. 4 is a schematic process flow diagram of the manifold shown in FIG. 1.

Fig. 5 is a partial cross-sectional view of the manifold shown in fig. 1.

FIG. 6 is a schematic view of another process flow for the manifold shown in FIG. 1. Fig. 7 is a schematic structural view of a branch pipe according to a second embodiment of the present invention.

Fig. 8 is a schematic structural view of a branch pipe according to a third embodiment of the present invention.

Fig. 9 is an enlarged schematic view of fig. 8 at B.

Detailed Description

Example one

The branch manifold provided by the embodiment comprises a branch manifold body 1 and a first connecting pipe 2. The branch pipe body 1 is integrally formed after being extruded by a pipe fitting, the branch pipe body 1 comprises an extruded main pipe 11 formed by extrusion and two branch pipes respectively communicated with the extruded main pipe, and the length L1 of the extruded main pipe 11 is more than or equal to 0.8 time of the pipe diameter of each branch pipe; the length L1 of the main extrusion pipe 11 is the vertical distance from the intersection of the center line of the main extrusion pipe 11 and the center lines of the two branch pipes to the input end of the main extrusion pipe 11. The first connecting pipe 2 is welded and connected with the input end of the main extrusion pipe 11.

This implementation provides a branched pipe body 1 adopts extruded mode integrated into one piece in the branched pipe, and extrusion after the extrusion is responsible for 11 length L1 very long, is 16 millimeters's pipe base to the pipe diameter, and the extrusion is responsible for 11 length and can reach more than 12.8 millimeters, and the length of the straight body section that the extrusion was responsible for promptly can reach more than 4.8 millimeters, is greater than the height of being responsible for the welding hole in the branched pipe of current punching press turn-ups shaping far away. When it is assembled with first takeover 2 and is welded the welding cooperation length very long, this not only makes things convenient for the welding and the welding back firmness is very strong. Furthermore, a large amount of experimental data also proves that the compression resistance bearing capacity of the product can be greatly improved by increasing the length of the extrusion main pipe 11, and the leakage rate of the product is reduced. The specific experiment is as follows: the output ends of the two branch pipes are closed, and after the internal air is completely cleaned from the input port of the extrusion main pipe 11, the branch pipes are filled with nitrogen, water or air through the pump pipe. The following process is carried out: applying high pressure P1 ═ 4.3 MPa; the low pressure P2 is 0.5MPa, the pressure is released or increased repeatedly, and no leakage occurs when the product is reciprocated for 25 ten thousand times; after the test, the test was carried out in 6.3MPa water for 1min, and no leakage was observed at each part. The manifold provided by the implementation well solves the problems that a main pipe formed by flanging in the manifold formed by the existing stamping process is low in welding hole height, low in welding firmness, poor in compression resistance and bearing capacity and high in leakage incidence rate.

Furthermore, because the length of the main extrusion pipe 11 is very long, when machining is performed, the input end of the main extrusion pipe 11 can be conveniently subjected to flaring or necking machining, and the main extrusion pipe can be matched with connecting pipes with different pipe diameters when being assembled, so that the main extrusion pipe has good compatibility.

In the present embodiment, the length L11 of the straight body of the main extrusion pipe 11 is equal to 0.4 times the pipe diameter of each branch pipe, i.e. the length L1 of the main extrusion pipe 11 is equal to 0.9 times the pipe diameter of each branch pipe. However, the present invention is not limited to this. In other embodiments, the length of the extruded main pipe may be 1.2 times, 1.5 times, 2 times, or other values greater than or equal to 0.8 times the diameter of the branch pipe. As shown in fig. 2, the length L11 of the straight section is the vertical distance from the middle of the transition section to the input end of the extruded main pipe. In this embodiment, the pipe diameter of the main extrusion pipe 11 is greater than that of the branch flow pipe, and the first connecting pipe 2 can be directly sleeved in the main extrusion pipe 11, so that the assembly is very convenient. However, the utility model discloses do not do any restriction to the pipe diameter that the extrusion is responsible for. In other embodiments, the diameter of the extruded main pipe may be less than or equal to the diameter of the branch pipes. In the present embodiment, as shown in fig. 1 and 2, in the branch pipe body, the two branch pipes are bent toward the output direction of the extruded main pipe 11, and the length L2 of the first branch pipe 12 is greater than the length L3 of the second branch pipe 13, which is the perpendicular distance from the intersection of the center lines of the two branch pipes to the output end of the corresponding branch pipe.

In the present embodiment, the first branch flow pipe 12 includes a first bending portion 121, a first straight portion 122 and a first connecting portion 123 formed at an end of the first straight portion 122, and the second branch flow pipe 13 includes a second bending portion 131 and a second connecting portion 132 formed at an end of the second bending portion 131. As shown in fig. 3, the first connecting section 123 includes a flared connecting portion 1231 and two first and second necked connecting portions 1232 and 1233, of which the pipe diameters are sequentially reduced; and the second connecting section 132 includes a flared connection. However, the present invention is not limited to this. In other embodiments, the first connecting section may also comprise only one flared connecting portion, only one necked connecting portion, or other combinations of the two; the second connection section may also comprise a plurality of flared connections, at least one necked connection, or a combination of both.

In this embodiment, the user can select corresponding connecting portion according to the pipe diameter of the outside takeover of difference when using. For example, when the pipe diameter of the external connection pipe is matched with the pipe diameter of the second necking connection part 1233, the second necking connection part 1233 is directly inserted into the external connection pipe. When the pipe diameter of the external connection pipe is matched with the pipe diameter of the first necking connection part 1232, the user cuts the second necking connection part 1233 by using a tool, and then inserts the first necking connection part 1232 into the external connection pipe. Or when the pipe diameter of the outer pipe fitting matches the flared connection 1231, the user will saw from the first necked connection 1232, inserting the outer pipe fitting into the flared connection 1231. Corresponding to the first connection section, in the present embodiment, the input end of the first connection pipe 2 is formed with three stages of flare connection portions 21 whose pipe diameters are sequentially increased. The three-stage flaring connecting part 21 on the first connecting pipe 2 not only improves the compatibility of the first connecting pipe 2, but also ensures the consistency of the input flow and the output flow of the product, thereby ensuring the equal pressure of a system pipeline. However, the present invention is not limited to this. In other embodiments, the input end of the first adapter may also have one, two or more than four flared (necked) connections.

In this embodiment, as shown in fig. 1, the branch pipe body further includes a transition section having a spherical curved surface and formed between the main extrusion pipe 11 and each branch pipe. Specifically, the first transition section 141 is formed between the extruded main tube 11 and the first bent section 121 and is bent in the opposite direction to the first bent section 121, and the second transition section 142 is formed between the extruded main tube 11 and the second bent section 131 and is bent in the opposite direction to the second bent section 131.

The arrangement of the first bending section 121 and the second bending section 131 prolongs the transmission path of the fluid or the gas, provides more space for the fluid or the gas to enter the corresponding straight section, and ensures that the flow rates entering the two branch branches are equal. On the one hand, when the extrusion main pipe 11 is formed by extrusion, the metal can flow along the spherical curved surfaces of the first transition section 141 and the second transition section 142 in the extrusion process, so that the extrusion resistance is reduced, and the larger the bending radius of the transition section is, the smaller the extrusion resistance is. However, the excessive bending radius affects the length of the extruded main pipe 11, so the two relations need to be balanced to select the bending radius of the transition section when setting. Preferably, the bending radius of the first transition section 141 and the bending radius of the second transition section 142 are set to be greater than or equal to 1/10 of the pipe diameter of the extruded main pipe. However, the present invention is not limited to this. On the other hand, the first transition section 141 and the second transition section 142 greatly reduce the resistance to the flow of the fluid or gas in the branch pipes, and the transition sections can rapidly distribute the fluid or gas in the main extrusion pipe 11 into the two branch pipes. During design, the curvature of the bending section and the curvature of the corresponding transition section can be controlled to realize balanced control of flow and flow speed, and the hyperbolic structure provides more parameter designs and can be controlled better and more accurately.

As shown in fig. 4 and 5, the processing procedure of the branch pipe provided by this embodiment is as follows: the blank tube is extruded to form a T-shaped structure, and the wall thickness of the tube is increased in triangular areas near the first bending section 121, the first transition section 141, the second bending section 131 and the second transition section 142, wherein the wall thickness is about 1.3T, and the thickening amount is about 20-50% T of the wall thickness of the tube. And then the product is annealed to eliminate the stress. And then the first bending section 121 and the second bending section 131 are processed into a U-shaped structure through bending, the wall thickness of the first transition section 141, the first bending section 121, the second transition section 142 and the second bending section 131 needs to be reduced by 5-15% T due to the extension wall thickness of the material, and finally the wall thickness of the first transition section 141, the first bending section 121, the second transition section 142 and the second bending section 131 is about 1.2T and is far greater than the wall thickness of other parts in the integrally formed branch pipe body, and the first transition section 141, the first bending section 121, the second transition section 142 and the second bending section 131 have good pressure resistance and higher use safety. However, the present invention is not limited to this. In other embodiments, as shown in fig. 6, the blank tube may be bent to form a U-shaped structure, and then the transition section is processed and then extruded to form an extruded main tube, and finally the main tube is expanded and shrunk and then integrally formed.

Example two

This embodiment is substantially the same as the first embodiment and its variations, except that: as shown in fig. 7, the manifold further includes a second nipple 3 welded to the second connection segment 132. In practical use, a user can select the structure of the second connecting pipe 3 welded on the second connecting section 132 according to the structure of the external piping, so that the user can use the pipe more flexibly, and the product compatibility is better.

Further, the structure of the output end of the second connecting pipe 3 is the same as that of the first connecting section 123, and the second connecting pipe also comprises a flaring connecting part and two necking connecting parts with sequentially reduced pipe diameters. However, the present invention is not limited to this. The outlet end of the second connecting pipe may also have a flared connection, a necked connection or a combination of both.

EXAMPLE III

This embodiment is substantially the same as the first embodiment and its variations, except that: as shown in fig. 8, the first branch flow pipe 12 includes a first curved section 121, a first straight section 122 and a first connecting section 123 formed at an end of the first straight section 122, and the second branch flow pipe 13 ' includes a second curved section 131 ', a second straight section 132 ' and a second connecting section 133 ' formed at an end of the second straight section 132 '. The length of first reposition of redundant personnel branch pipe 12 and second reposition of redundant personnel branch pipe 13' is all longer in the branching pipe that this embodiment provided, can directly assemble mutually with outside pipe fitting, need not additionally to weld again on two reposition of redundant personnel branch pipes and takes over, and not only convenient to use and only first takeover 11 department has a welding seam in the whole branching pipe, the security of product is very high.

As with the first connecting section 123, in the embodiment, as shown in fig. 9, the second connecting section 133 'also includes a flared connecting portion 1331' and two first and second reduced-diameter connecting portions 1332 'and 1333' with successively reduced tube diameters. In other embodiments, the second connecting section may also include a plurality of flared connecting portions, one or more than three necked connecting portions, or a combination of both. Similarly, the user can select the corresponding connecting part according to the pipe diameters of different external connecting pipes when in use.

Since the first branch pipes 12 and the second branch pipes 13 ' are long, the first branch pipes 12 are longer than the second branch pipes 13 ' in order to facilitate the processing of the first connection section 123 and the second connection section 133 ' during assembly. However, the present invention is not limited to this. In other embodiments, the lengths of the two branch lines may be equal.

Although the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of other modifications and variations without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A manifold, comprising:

The branch pipe body is integrally formed after being extruded by a pipe fitting, the branch pipe body comprises an extruded main pipe formed by extrusion and two branch pipes respectively communicated with the extruded main pipe, and the length of the extruded main pipe is greater than or equal to 0.8 time of the pipe diameters of the branch pipes; the length of the extrusion main pipe is the vertical distance from the intersection of the center line of the extrusion main pipe and the center lines of the two branch pipes to the end part of the input end of the extrusion main pipe;

And the first connecting pipe is connected with the input end of the extrusion main pipe in a welding manner.

2. The manifold of claim 1, wherein the extruded main pipe has a pipe diameter greater than or equal to the pipe diameter of the branch pipes.

3. The manifold of claim 1, wherein the manifold body further comprises a spherically curved transition section formed between the extruded main pipe and each of the branch pipes.

4. The manifold of claim 3, wherein the wall thickness of the transition section is greater than or equal to the wall thickness of the manifold body elsewhere.

5. The manifold of claim 1, wherein in the manifold body, both branch pipes are bent towards the output direction of the main extrusion pipe, and the length of the first branch pipe is greater than that of the second branch pipe, and the length is the perpendicular distance from the intersection of the center lines of the two branch pipes to the output end of the corresponding branch pipe.

6. The manifold of claim 1 or 5, wherein the first branch manifold comprises a first curved section, a first straight section, and a first connecting section formed at an end of the first straight section, and the second branch manifold comprises a second curved section and a second connecting section formed at an end of the second curved section.

7. The manifold of claim 6, further comprising a second nipple welded to the second connecting segment.

8. The manifold of claim 6, wherein the first connecting section and the second connecting section each comprise at least one flared connection or at least one necked connection.

9. The manifold of claim 1, wherein the extruded main pipe has a straight length greater than or equal to 0.4 times the diameter of each branch pipe.

10. The manifold of claim 1, wherein the input end of the first nozzle has at least one flared connection or at least one necked connection and the output end of the second nozzle has at least one flared connection or at least one necked connection.

11. The manifold of claim 1, wherein the first branch manifold comprises a first curved section, a first straight section, and a first connecting section formed at an end of the first straight section, and wherein the second branch manifold comprises a second curved section, a second straight section, and a second connecting section formed at an end of the second straight section.