CN217354578U

CN217354578U - Drainage device of impact type water distribution ring pipe

Info

Publication number: CN217354578U
Application number: CN202220409312.8U
Authority: CN
Inventors: 周恒特; 谢可为; 梁权伟; 万兵; 汪刚; 吴中竟; 段昌德; 胡江艺
Original assignee: Dongfang Electric Machinery Co Ltd DEC
Current assignee: Dongfang Electric Machinery Co Ltd DEC
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-09-02
Anticipated expiration: 2032-02-28

Abstract

The utility model discloses a drainage device of impacted style water distribution ring canal belongs to fluid machinery engineering technical field, including installing the intraductal drainage plate in bifurcation, its characterized in that: the maximum diameter of the inscribed circle of the cross section of the branch pipe is D, the drainage plate is provided with a square groove, the head of the drainage plate is a wedge-shaped head, the extending length of the wedge-shaped head is 3D/14, and the wedge-shaped head is provided with a first fillet. The utility model discloses a wedge drainage plate can play the guide effect to the incoming flow, and balanced both sides pressure improves the flow field and distributes, reduces the torrent, reduces hydraulic loss.

Description

Drainage device of impact type water distribution ring pipe

Technical Field

The utility model relates to fluid machinery engineering technical field especially relates to an impact type water distribution ring canal's drainage device.

Background

The impulse turbine is a hydraulic machine which leads out free jet with kinetic energy by means of a water guide mechanism, and the free jet impacts a runner bucket to enable a runner to rotate to do work, so that hydraulic energy is converted into mechanical energy.

The impulse turbine is suitable for a power station with high water head and small flow, converts water from a pressure pipeline into high-speed jet flow through a nozzle, tangentially impacts a rotating wheel, pushes the rotating wheel to rotate, and drives a generator rotor to rotate to generate electricity.

In impulse turbines, the relative positions of the working jet and the runner and the number of times of work are different, and the impulse turbines are classified into a tangential turbine, a diagonal turbine and a double-impulse turbine.

A shear turbine, also known as a pelton turbine or pelton turbine; the arrangement mode of the main shaft is divided into a horizontal shaft and a vertical shaft, and no matter which type of rotating wheel is always positioned in the atmosphere. The water turbine is suitable for high-head and small-flow hydropower stations. The inclined jet turbine utilizes a nozzle to change the pressure energy of water flow into velocity energy, the water flow enters a rotating wheel from a nozzle to leave the rotating wheel in the whole working process, free jet flow is formed in a casing filled with air instead of a closed system, and 3-4 bucket blades always receive the free jet flow with different flow rates of the same nozzle at the same time. The double-impulse turbine is, in principle, between a reaction turbine and a pelton turbine. After water flows out of the nozzle through the water conduit, water flows into the center of the rotating wheel through the radial blades from the periphery of the rotating wheel, and after the first energy exchange is completed, the water flows out of the rotating wheel through the radial blades from the center of the rotating wheel, so that the second energy exchange is completed.

The water distribution ring pipe in the impulse turbine mainly plays a role in guiding incoming flow, and the flow state distribution in the water distribution ring pipe can influence the quality of outflow, so that the performance of the unit is influenced.

The conventional branch pipe is usually structurally reinforced by adopting a mode of additionally arranging reinforcing ribs, and a mode of internally arranging crescent rib plates is also adopted, but the conventional crescent rib plates can bring certain unstable turbulence and hydraulic loss.

Chinese patent publication No. CN 204704528U, whose publication date is 2015, 10 months and 14 days, discloses a crescent rib plate, which comprises a plate body, the plate body includes an inner edge and an outer edge, the outer edge is in an elliptic arc shape, and is characterized in that: the inner edge is in an elliptical arc shape.

The crescent rib disclosed in this patent document has less interference on the internal water flow, so that the head loss is small.

Chinese patent publication No. CN 213712241U, published 2021, 07/16/discloses a crescent rib plate with asymmetric shape, which is characterized in that: the crescent rib plate is in a crescent shape which is asymmetric up and down; the inner edge curve of the crescent rib plate consists of an ab straight-line segment, a bc circular arc segment, a cd circular arc segment and a de straight-line segment; the radius of the bc circular arc section is larger than that of the cd circular arc section; the outer edge curve of the crescent rib plate is an elliptic curve, and the elliptic major axis of the elliptic curve forms a certain angle with the horizontal line.

The asymmetric crescent rib disclosed in this patent document is coordinated with the shape of the branch pipe, and the stress distribution is reasonable.

In the prior art represented by the above patent documents, the problems of large unstable turbulence and hydraulic loss still exist due to unreasonable structural design.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome above-mentioned prior art's defect, provide an impact type water distribution ring canal's drainage device, the utility model discloses a wedge drainage plate can play the guide effect to the incoming flow, and balanced both sides pressure improves the flow field and distributes, reduces the torrent, reduces hydraulic loss.

The utility model discloses a following technical scheme realizes:

the utility model provides an impact type water distribution ring canal's drainage device, is including installing the drainage plate in the bifurcation pipe, its characterized in that: the maximum diameter of the inscribed circle of the cross section of the branch pipe is D, the drainage plate is provided with a square groove, the head of the drainage plate is a wedge-shaped head, the extending length of the wedge-shaped head is 3D/14, and the wedge-shaped head is provided with a first fillet.

The cross section of the drainage plate is C-shaped.

The wedge angle of the wedge-shaped head is alpha, and the wedge angle alpha is 30 degrees.

The first radius of the fillet on the wedge-shaped head is D/56.

The width of the drainage plate is D/21.

The length of square groove is 9D 56, and the width of square groove is 3D 56, all opens the second fillet that the size is the same on four angles of square groove.

The beneficial effects of the utility model are mainly expressed in the following aspect:

1. the utility model discloses, the biggest inscribe circle diameter of section of branch pipe is D, it has square groove to open on the drainage plate, the head of drainage plate is the wedge head, the length of stretching into of wedge head is 3D 14, it has first radius angle to open on the wedge head, the head of drainage plate is the wedge head, adopt specific length of stretching into, and set up first radius angle on the wedge head, can guide the incoming flow better, alleviate the incoming flow striking, current technology, can play the guide effect to the incoming flow through the wedge drainage plate, balanced both sides pressure, improve the flow field and distribute, reduce the torrent, reduce hydraulic loss.

2. The utility model discloses, the transversal "C" style of calligraphy of personally submitting of drainage plate, it is simple to make, simple to operate.

3. The utility model discloses, the wedge angle of wedge head is alpha, and wedge angle alpha is 30, and the too big striking loss that can bring of wedge angle, and wedge angle undersize can make the thickness of wedge head too weak, influences the overall structure intensity of drainage plate, and specific setting up to 30 wedge angle can ensure that the drainage plate has good overall structure intensity, can reduce the incoming flow striking again, reduces hydraulic loss.

4. The utility model discloses, the first radius angle radius on the wedge head is D56, can ensure that the wedge head has better structural strength, also can play good drainage effect.

5. The utility model discloses, the width of drainage plate is D21, can play fine drainage effect, and can play the strengthening rib effect.

6. The utility model discloses, the length of square groove is 9D 56, and the width of square groove is 3D 56, all opens the second radius angle that has the same size on four angles of square groove, can get through the flow field of drainage plate both sides, plays balanced pressure, improves the effect of torrent.

Drawings

The invention will be further described with reference to the accompanying drawings and the following detailed description, in which:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the wedge-shaped head of the present invention;

FIG. 3 is a schematic structural view of the present invention installed on a branch pipe;

the labels in the figure are: 1. the branch pipe comprises a branch pipe body 2, a drainage plate 3, a square groove 4, a wedge-shaped head 5, a first fillet 6 and a second fillet.

Detailed Description

Example 1

Referring to fig. 1-3, the impact type water distribution ring pipe drainage device comprises a drainage plate 2 installed in a branch pipe 1, wherein the maximum diameter of an inscribed circle of the cross section of the branch pipe 1 is D, a square groove 3 is formed in the drainage plate 2, the head of the drainage plate 2 is a wedge-shaped head 4, the extending length of the wedge-shaped head 4 is 3D/14, and a first rounded corner 5 is formed in the wedge-shaped head 4.

This embodiment is most basic embodiment, the biggest inscribe circle diameter of section of branch pipe 1 is D, it has square groove 3 to open on the drainage plate 2, the head of drainage plate 2 is wedge head 4, the length of stretching into of wedge head 4 is 3D 14, it has first radius angle 5 to open on the wedge head 4, the head of drainage plate 2 is wedge head 4, adopt specific length of stretching into, and set up first radius angle 5 on wedge head 4, can guide the incoming flow better, alleviate the incoming flow striking, compared with the prior art, can play the guide effect to the incoming flow through wedge drainage plate 2, balanced both sides pressure, improve the flow field and distribute, reduce the torrent, reduce hydraulic loss.

Example 2

The cross section of the drainage plate 2 is C-shaped.

The present embodiment is a preferred embodiment, and the cross section of the drainage plate 2 is "C", so that the manufacturing is simple and the installation is convenient.

Example 3

The cross section of the drainage plate 2 is C-shaped.

The wedge angle of the wedge-shaped head 4 is alpha, and the wedge angle alpha is 30 degrees.

This embodiment is still another preferred implementation, and wedge angle of wedge head 4 is alpha, and wedge angle alpha is 30, and too big wedge angle can bring the impact loss, and wedge angle undersize can make wedge head 4's thickness too weak, influences the overall structure intensity of drainage plate 2, and the specific wedge angle that sets up to 30 can ensure that drainage plate 2 has good overall structure intensity, can reduce the incoming flow again and strike, reduces hydraulic loss.

Example 4

The cross section of the drainage plate 2 is C-shaped.

The first rounded corner 5 on the wedge-shaped head 4 has a radius D/56.

In the embodiment, which is a further preferred embodiment, the radius of the first rounded corner 5 on the wedge-shaped head 4 is D/56, which can ensure that the wedge-shaped head 4 has better structural strength and can also play a role in good drainage.

Example 5

The cross section of the drainage plate 2 is C-shaped.

The first rounded corner 5 on the wedge-shaped head 4 has a radius D/56.

The width of the drainage plate 2 is D/21.

In another preferred embodiment, the width of the drainage plate 2 is D/21, which can achieve a good drainage effect and can also function as a reinforcing rib.

Example 6

The cross section of the drainage plate 2 is C-shaped.

The first rounded corner 5 on the wedge-shaped head 4 has a radius D/56.

The width of the drainage plate 2 is D/21.

The length of square groove 3 is 9D 56, and the width of square groove 3 is 3D 56, all opens the second fillet 6 that has the same size on four angles of square groove 3.

The best mode is to this embodiment, and the length of square groove 3 is 9D 56, and the width of square groove 3 is 3D 56, all opens the second fillet 6 that has the same size on four angles of square groove 3, can get through the flow field of drainage plate 2 both sides, plays balanced pressure, improves the effect of torrent.

Claims

1. The utility model provides a drainage device of impact type water distribution ring canal, is including installing drainage plate (2) in bifurcated pipe (1), its characterized in that: the maximum diameter of the inscribed circle of the cross section of the branch pipe (1) is D, a square groove (3) is formed in the drainage plate (2), the head of the drainage plate (2) is a wedge-shaped head (4), the stretching length of the wedge-shaped head (4) is 3D/14, and a first fillet (5) is formed in the wedge-shaped head (4).

2. The device for guiding an impulse distribution collar of claim 1, characterized in that: the cross section of the drainage plate (2) is C-shaped.

3. The device for guiding an impulse distribution collar of claim 1, characterized in that: the wedge angle of the wedge-shaped head (4) is alpha, and the wedge angle alpha is 30 degrees.

4. The device for guiding an impulse distribution collar of claim 1, characterized in that: the radius of the first rounding off (5) on the wedge-shaped head (4) is D/56.

5. The device for guiding an impulse distribution collar of claim 1, characterized in that: the width of the drainage plate (2) is D/21.

6. The apparatus for diverting an impulse distribution pipe according to claim 1, characterized in that: the length of the square groove (3) is 9D/56, the width of the square groove (3) is 3D/56, and second fillets (6) with the same size are arranged at four corners of the square groove (3).