CN217559318U

CN217559318U - Reducing downstream tee

Info

Publication number: CN217559318U
Application number: CN202220360140.XU
Authority: CN
Inventors: 祝义成; 雷雨
Original assignee: China Construction Third Bureau Installation Engineering Co Ltd
Current assignee: China Construction Third Bureau Installation Engineering Co Ltd
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-10-11
Anticipated expiration: 2032-02-22

Abstract

The utility model discloses a reducing downstream tee joint, which comprises a main pipe, wherein at least one main pipe interface is arranged on the periphery of the main pipe, the main pipe interface is welded and connected with a reducing elbow, the reducing elbow is provided with a large elbow port and a small elbow port, the large elbow port is cut along the bending direction to form an elbow interface, the elbow interface is matched and butted with the main pipe interface and is welded and fixed, and the small elbow port is provided with an elbow flange; the inner diameter of the large elbow port is the same as that of the main pipe, and the size of the large elbow port is larger than that of the small elbow port; the reducing downstream tee joint is simple in structure, easy to machine and manufacture, and can be applied to water channel pipelines such as pump stations, pump rooms and cooling machine rooms, the water flow resistance in the downstream direction can be obviously reduced, and the pipeline welding workload is reduced.

Description

Reducing downstream tee

Technical Field

The utility model relates to the technical field of the pipeline, concretely relates to reducing downstream tee bend.

Background

The downstream tee is a pipe fitting in a drainage pipeline and is used for vertically connecting a branch pipe with a main pipe. Although the branch pipes are vertically connected, the joints of the branch pipes entering the main pipe are not vertically intersected but connected by a small segment of circular arc along the water flow direction, so that the water of the branch pipes smoothly flows to the main pipe. The small section of circular arc plays a role in downstream, and the downstream circular arcs designed by different manufacturers are different in size and length, but are called downstream tee joints only if the downstream circular arcs exist.

The existing downstream tee mainly has the forms of a 90-degree inclined tee, a 45-degree inclined tee and the like, and the downstream tee is not in a reducing form, so that the sizes of a main pipe and a branch pipe are basically the same; there is also a three-way pipe with different diameter, so that the pipe diameters of the main pipe and the branch pipe are different.

One of the more common methods for manufacturing the reducer tee is to cut a pipe with the same diameter as the main pipe by 90 degrees on the main pipe and then weld the reducer pipe with the reducer of the reducer head, and this method can form the reducer, but the downstream effect is not good.

Also like the chinese utility model patent (publication No. CN 213901427U), in 2021 a combined application device of a downstream tee and an intelligent fluid pump set was disclosed, including a downstream tee and an intelligent fluid pump set, the downstream tee includes an inlet tee and an outlet tee, the inlet tee includes an inlet main pipe, a plurality of obliquely arranged inlet inclined pipes are fixedly connected to the inlet main pipe, the outlet tee includes an outlet main pipe, and a plurality of obliquely arranged outlet inclined pipes are fixedly connected to the outlet main pipe. The utility model discloses an adopt in the same direction as water tee bend with import branch pipe and outlet branch pipe respectively with the female union coupling of import and export, compare in traditional formula tee junction that cut straightly, can reduce the water resistance, this kind of tee bend preparation mode in the same direction as water is the pipe chute that forms through 45 degrees pipe chute cooperation 45 degrees elbows welding, this kind of structure needs multistage pipeline welding to form the pipe chute, the welded volume is bigger, the preparation is welded and is adorned inconveniently.

Disclosure of Invention

The utility model aims at providing a reducing is along with water tee bend to the problem that prior art exists.

In order to achieve the purpose, the utility model adopts the technical proposal that:

a reducing downstream tee joint comprises a main pipe, wherein at least one main pipe interface is arranged on the periphery of the main pipe, a reducing elbow is welded and connected to the main pipe interface, the reducing elbow is provided with a large elbow port and a small elbow port, the large elbow port is cut along the bending direction to form an elbow interface, the elbow interface is matched with the main pipe interface, butted and welded and fixed, and the small elbow port is provided with an elbow flange; the inner diameter of the large elbow port is the same as that of the main pipe, and the size of the large elbow port is larger than that of the small elbow port.

The reducing downstream tee joint is simple in structure, easy to process and manufacture, and applied to water channel pipelines such as pump stations, pump rooms and cooling machine rooms, the flow resistance in the downstream direction can be obviously reduced, and the flow speed and the flow are ensured.

Compare in the form of current 45 degrees pipe chute cooperation 45 degrees elbows, perhaps the form of oblique branch pipe cooperation reducing head, this reducing is all less with the equipment work load in the same direction as water three-way, only needs the welding be responsible for the interface with the elbow interface can, reduced the concatenation work of many times welding and multiple pipe fitting, production preparation convenient and fast more.

And the flow of the water flow flowing into the reducing elbow pipe from the branch pipe and then entering the main pipe at the cross section (namely, the opening size of the main pipe interface and the elbow interface is the largest) is relatively large, so that the water flow is easy to converge with the main pipe water flow, and the generated water flow resistance is relatively small.

Reducing return bend originally is 90 degrees reducing return bends, has complete big elbow port, before butt welding, carries out wire-electrode cutting to it, forms on big elbow the elbow interface, the elbow interface with the profile of being responsible for the interface is unanimous basically, and both can form the following water tee bend structure of this application after the welding.

Furthermore, a plane where a large elbow port of the reducing elbow pipe is located is an A plane, a plane where a cross section of the main pipe is located is a B plane, and when the A plane is parallel to and coincides with the B plane, a profile formed by the intersection of the reducing elbow pipe and the main pipe is the profile of the main pipe interface.

That is, since the inside diameter of the large elbow port is the same as the inside diameter of the main pipe, the cut large elbow port is substantially coincident with the cross-section of the main pipe, which facilitates the determination of the shape of the interface profile on the one hand and facilitates the perpendicular alignment of the central axis of the small elbow port with the central axis of the main pipe on the other hand.

Furthermore, the central axis of the port of the small elbow is perpendicular to the central axis of the main pipe.

Furthermore, the plane of the large elbow port is perpendicular to the plane of the small elbow port.

Furthermore, the bending direction of the reducing elbow is the water flowing direction.

Furthermore, the axial two ends of the main pipe are respectively provided with a main pipe flange.

Furthermore, the size of the elbow flange is smaller than that of the main pipe flange, and the central axis of the main pipe flange is perpendicular to that of the elbow flange.

The arrangement of the main pipe flange is convenient for butt joint with the adjacent main pipe through bolts, and the arrangement of the bent pipe flange is convenient for bolt connection with the branch pipe.

Furthermore, according to a steel pipe DN size comparison table, the size of the small elbow port is two times smaller than that of the large elbow port.

The pipe diameters of the small elbow ports are gradually and smoothly increased towards the large elbow ports, and the sizes of the large elbow ports and the small elbow ports are arranged at intervals of two, so that reasonable main pipes and branch pipelines can be formed.

As shown in table 1, the pipe diameter of the steel pipe is gradually increased in a certain size, and the flow rate of the steel pipe is also changed correspondingly; the size of the large elbow port and the small elbow port of the reducing elbow pipe can be selected according to table 1, for example, the pipe diameter of the main pipe is 500mm, and the pipe diameter of the branch pipe is two-number smaller, namely 350mm; the size of the corresponding big elbow port is 500mm, and the size of the small elbow port is 350mm.

Table 1: caliber (DN) size and flow comparison table

Furthermore, the main pipe is sequentially welded with three reducing bent pipes at equal intervals along the water flow direction. Through the arrangement, the main pipe can be in butt joint with a plurality of branch pipes at different positions, and each branch pipe is arranged in a downstream diameter-changing mode.

Compared with the prior art, the beneficial effects of the utility model are that: 1. the reducing downstream tee joint has a simple structure, is easy to process and manufacture, and can be applied to water channel pipelines such as pump stations, pump rooms, cooling machine rooms and the like, so that the resistance of water flow in the downstream direction can be obviously reduced, and the flow speed and the flow are ensured; compared with the existing form that a 45-degree inclined pipe is matched with a 45-degree elbow or the form that an inclined branch pipe is matched with a reducing head, the reducing downstream tee joint has smaller welding workload and assembly workload, only the main pipe connector and the elbow connector need to be welded, the repeated welding and the splicing work of various pipe fittings are reduced, and the production and the manufacture are more convenient and faster; 3. this reducing is water tee bend in same direction as can guarantee to flow into from the branch pipe the rivers of reducing return bend, reentrant the flow of the cross-section of junction is great when being responsible for, joins with being responsible for rivers very easily, and the rivers resistance that produces is less.

Drawings

Fig. 1 is a schematic three-dimensional structure diagram of the reducing downstream tee joint of the present invention;

FIG. 2 is a schematic view of the main pipe structure of the reducing downstream tee joint of the present invention;

fig. 3 is a schematic structural view of a reducing elbow of the reducing downstream tee joint of the present invention;

fig. 4 is a schematic structural view of the reducing elbow of the reducing downstream tee joint of the present invention after being cut;

FIG. 5 is a schematic structural view of another reducing downstream tee of the present invention;

in the figure: 1. a main pipe; 2. a supervisor interface; 3. reducing bent pipes; 301. a large elbow port; 302. a small elbow port; 4. an elbow connector; 5. a bent pipe flange; 6. a main pipe flange.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The first embodiment is as follows:

as shown in fig. 1 and 2, a reducing downstream tee joint comprises a main pipe 1, wherein a main pipe interface 2 is arranged in the middle of the periphery of the main pipe 1, a reducing elbow 3 is welded to the main pipe interface 2, the reducing elbow 3 is provided with a large elbow port 301 and a small elbow port 302, the large elbow port 301 is cut along the bending direction to form an elbow interface 4, the elbow interface 4 is matched with the main pipe interface 2 for butt joint and is welded and fixed, and the small elbow port 302 is provided with an elbow flange 5; the inner diameter of the large elbow port 301 is the same as the inner diameter of the main pipe 1, and the size of the large elbow port 301 is larger than that of the small elbow port 302.

The reducing downstream tee joint is simple in structure, easy to machine and manufacture, and can be applied to water channel pipelines such as pump stations, pump rooms and cooling machine rooms, the flow resistance in the downstream direction can be obviously reduced, and the flow speed and the flow are ensured.

Compare in the form of current 45 degrees pipe chute cooperation 45 degrees elbows, perhaps the form of oblique branch pipe cooperation reducing head, this reducing is all less with the equipment work load in the same direction as water three-way, only needs the welding be responsible for interface 2 with elbow interface 4 can, reduced the concatenation work of many times welding and multiple pipe fitting, production preparation convenient and fast more.

And the flow of the water flow flowing into the reducing elbow 3 from the branch pipe and then entering the main pipe 2 at the cross section (namely, the opening size of the main pipe interface and the elbow interface is the largest) is relatively large, so that the water flow is easy to converge with the main pipe water flow, and the generated water flow resistance is relatively small.

As shown in fig. 3, the reducer elbow 3 is originally a 90-degree reducer elbow, has a complete large elbow port 301, and is subjected to linear cutting before butt welding, and the elbow interface 4 (as shown in fig. 4) is formed on the large elbow, and the elbow interface 4 is basically consistent with the profile of the main pipe interface 2, and the two are welded to form the downstream tee structure of the present application.

Further, a plane where a large elbow port 301 of the reducing elbow 3 is located is an a plane, a plane where a middle cross section of the main pipe 1 is located is a B plane, and when the a plane is parallel to and coincides with the B plane, a profile formed by intersection of the reducing elbow 3 and the main pipe 1 is the profile of the main pipe interface 2.

That is, since the inside diameter of the large elbow port 301 is the same as the inside diameter of the main pipe 2, the cut-away large elbow port 301 is substantially coincident with the cross-section of the main pipe 2, which facilitates the determination of the shape of the interface profile on the one hand and facilitates the perpendicular holding of the central axis of the small elbow port 302 to the central axis of the main pipe 2 on the other hand.

Further, according to a steel pipe DN size comparison table, the size of the small elbow port 302 is two times smaller than that of the large elbow port 301.

The small elbow port 302 is gradually and smoothly increased towards the large elbow port 301, and the sizes of the large elbow port and the small elbow port are arranged at intervals of two numbers, so that a reasonable main pipe and a branch pipeline can be formed.

The size of the large elbow port and the small elbow port of the reducing elbow pipe can be selected according to table 1, for example, the pipe diameter of the main pipe 1 is 500mm, and the pipe diameter of the branch pipe is two-number smaller, namely 350mm; the corresponding large elbow port 301 is 500mm in size and the small elbow port 302 is 350mm in size.

Furthermore, the bending direction of the reducing elbow 3 is the water flowing direction.

Further, the two axial ends of the main pipe 1 are respectively provided with a main pipe flange 6.

Further, the size of the elbow flange 5 is smaller than that of the main pipe flange 6, and the central axis of the main pipe flange 6 is perpendicular to the central axis of the elbow flange 5.

The arrangement of the main pipe flange 6 is convenient for butt joint with the adjacent main pipe through bolts, and the arrangement of the elbow pipe flange 5 is convenient for bolt connection with the branch pipe. Be responsible for flange 6 and weld be in be responsible for the tip of 1, return bend flange 5 also welds little elbow port department.

Example two:

the embodiment provides a reducing downstream tee structure with another structure.

As shown in fig. 5, three reducing elbows 3 are sequentially welded on the main pipe 1 at equal intervals along the water flow direction. Through such setting, can be one the branch pipe of many different positions of butt joint on being responsible for 1, every branch pipe is the reducing setting of following water.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The reducing downstream tee joint comprises a main pipe and is characterized in that at least one main pipe interface is arranged on the periphery of the main pipe, a reducing elbow is connected to the main pipe interface in a welding mode, the reducing elbow is provided with a large elbow port and a small elbow port, the large elbow port is cut along the bending direction to form an elbow interface, the elbow interface is matched with the main pipe interface in a butt joint mode and is fixed in a welding mode, and an elbow flange is arranged at the small elbow port; the inner diameter of the large elbow port is the same as that of the main pipe, and the size of the large elbow port is larger than that of the small elbow port.

2. The reducing downdraft tee joint according to claim 1, wherein a plane where a large elbow port of the reducing elbow is located is an a plane, a plane where a cross section of the main pipe is located is a B plane, and when the a plane is parallel to and coincides with the B plane, a profile formed by the intersection of the reducing elbow and the main pipe is a profile of the main pipe interface.

3. The reducing downstream tee of claim 1, wherein the central axis of the small elbow port is perpendicular to the central axis of the main pipe.

4. The reducing downstream tee of claim 1, wherein the size of the small elbow port is two times smaller than the size of the large elbow port according to a steel pipe DN size comparison table.

5. The reducing water tee of claim 1, wherein the plane of the large elbow port is perpendicular to the plane of the small elbow port.

6. The variable diameter downdraft tee of claim 1, wherein a bending direction of the variable diameter elbow is a downdraft direction.

7. The reducing downstream tee joint of claim 1, wherein three reducing elbows are welded to the main pipe at equal intervals in sequence along the water flow direction.

8. The reducing downstream tee joint of claim 1, wherein the main pipe flanges are respectively provided at both axial ends of the main pipe.

9. The variable-diameter downstream tee joint of claim 8, wherein the elbow flange is smaller in size than the main pipe flange, and the central axis of the main pipe flange is perpendicular to the central axis of the elbow flange.