CN217234843U

CN217234843U - Diffusion type energy dissipater

Info

Publication number: CN217234843U
Application number: CN202221026856.2U
Authority: CN
Inventors: 李习洪; 马志祥
Original assignee: WUHAN DAYU VALVE CO Ltd
Current assignee: WUHAN DAYU VALVE CO Ltd
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2022-08-19
Anticipated expiration: 2032-04-28

Abstract

The utility model discloses a diffusion formula energy dissipater, include: a pod; the energy dissipater body is hermetically connected with the inlet end of the flow guide cover, a plurality of spray holes for communicating the flow guide cover and the energy dissipater body are formed in the energy dissipater body, and the energy dissipater body can block water flow and spray outwards through the spray holes to form high-speed spray flows; and the energy dissipation net is arranged in the flow guide cover and used for receiving jet flows from at least part of the jet holes. The utility model discloses the energy dissipater body adopts toper diffusion energy dissipation section and shutoff section, and toper diffusion energy dissipation section progressively reduces the flow area of water to can form high-pressure liquid rapidly under the cooperation of shutoff section, be favorable to forming high-speed jet flow in jet hole department, high-speed jet flow can be played on energy dissipation net and the kuppe, reach the energy dissipation effect.

Description

Diffusion type energy dissipater

Technical Field

The utility model relates to a pipeline valve technical field, concretely relates to diffusion formula energy dissipater.

Background

Pipeline energy dissipation is an important measure for ensuring the safety of pipelines and downstream buildings, has attracted much attention of people in recent years, has attracted a great deal of research of many scholars, and has been applied to hydraulic engineering and industrial and agricultural building engineering, such as long-distance water pipeline systems, water supply and drainage pipeline systems of power stations and pump stations, agricultural irrigation pipeline water supply systems and the like. The pipeline energy dissipation has the advantages of low cost, no pollution to water quality, small occupied area or no occupied area and the like, thereby having wide application prospect.

The pipeline energy dissipater is a key component in a pipeline water delivery system, and the water delivery effect, the cost and the service life of the pipeline water delivery system are directly influenced by the quality of the working state of the pipeline energy dissipater, so that the research and development of the pipeline energy dissipater have practical use value and practical value and are widely valued by research and development personnel.

Especially, at the water diversion port and the end of the pipeline of the pressure water conveying pipeline, the flow rate is very high during normal outflow due to high pressure, so that great destructive power is extremely easy to be caused to the outside, and the use and safety requirements of equipment cannot be met. It is therefore desirable to provide an energy dissipater for installation at the end of a pipe to overcome the impact and cavitation hazards associated with the high flow rates at the outlet of the pipe.

SUMMERY OF THE UTILITY MODEL

To the not enough of existence among the prior art, the utility model aims to provide a diffusion energy dissipater. The energy dissipation effect can be achieved on the high-speed water flow at the outlet of the pipeline, the safety is improved, and the use requirement is met. The device can be used with a valve or independently.

In order to solve the technical problem, the utility model discloses a following technical scheme realizes:

a diffusing energy dissipater comprising:

a pod;

the energy dissipater body is hermetically connected with the inlet end of the flow guide cover, a plurality of spray holes for communicating the flow guide cover and the energy dissipater body are formed in the energy dissipater body, and the energy dissipater body can block water flow and spray outwards through the spray holes to form high-speed spray flows; and

the energy dissipation net is arranged in the flow guide cover and used for receiving jet flows from at least part of the jet holes.

Preferably, the energy dissipater body comprises a connecting section, a diffusion energy dissipation section and a blocking section which are sequentially connected in a sealing manner along the water flow direction; the diffusion energy dissipation section is of a conical structure, and an included angle between the conical surface of the diffusion energy dissipation section and the water flow direction is an obtuse angle; the spray holes are formed in the conical surface of the diffusion energy dissipation section.

Preferably, the air guide sleeve is provided with a plurality of through holes communicated with the outside.

Further preferably, the total area of the through holes is at least 1 time or more of the total area of the injection holes.

Further preferably, the air guide sleeve comprises a first air guide section and a second air guide section which are sequentially connected in a sealing manner along the water flow direction, the inlet end of the first air guide section is connected with the diffusion energy dissipation section in a sealing manner, each spray hole is covered in the air guide sleeve, and the through hole is formed in the first air guide section.

Still further preferably, the first flow guiding section is of a conical structure, and the included angle between the conical surface of the first flow guiding section and the water flow direction is an acute angle and the included angle between the conical surface of the first flow guiding section and the conical surface of the diffusion energy dissipation section is 90-120 degrees.

Preferably, the energy dissipation net is a cylindrical structure with a conical cross section, and an included angle between the energy dissipation net and the water flow direction is an obtuse angle.

Preferably, the diameter of the inlet end of the energy dissipater body is 140-250% of the diameter of the outlet end of the air guide sleeve.

Preferably, the spraying direction of the spraying holes is coincided with the normal line perpendicular to the tangent plane of the spraying holes, and at least 60% of the projection area of the spraying holes in the spraying direction can cover the energy dissipation net.

Further preferably, the included angle of the centers of the diffusion energy dissipation sections is 40-90 degrees, the included angle of the centers of the energy dissipation nets is 10-60 degrees, and the included angle of the centers of the energy dissipation nets should be smaller than the included angle of the centers of the diffusion energy dissipation sections.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

1. the utility model discloses the energy dissipater body adopts toper diffusion energy dissipation section and shutoff section, and toper diffusion energy dissipation section progressively reduces the flow area of water to can form high-pressure liquid rapidly under the cooperation of shutoff section, be favorable to forming high-speed jet flow in jet hole department, high-speed jet flow can be played on energy dissipation net and the kuppe, reach the energy dissipation effect.

2. The utility model discloses be provided with the through-hole on the first kuppe of toper, high-speed jet flow can lead to near first kuppe formation negative pressure, it is inboard to inhale the kuppe with kuppe outside medium from the through-hole, form the mixed stream with high-speed jet, the mixed stream moves forward, partly is beaten on the energy dissipation net, partly is beaten on the kuppe, after some is bounce-back by the energy dissipation net in addition, spout the kuppe behind the intensive mixing of energy dissipation net department, reach best energy dissipation effect.

3. The utility model discloses the energy dissipater can be suitable for great pressure differential, and pressure differential is comparatively suitable between 0.05MPa to 1MPa, also is applicable to more abominable cavitation condition simultaneously.

Drawings

Figure 1 is a schematic cross-sectional structure of the energy dissipater of the present invention;

figure 2 is a schematic structural view of the energy dissipater body of the energy dissipater of the utility model;

FIG. 3 is a schematic diagram of the angle between the centers of the various parts of the energy dissipater of the present invention;

figure 4 is a schematic view of the energy dissipater of the present invention.

Reference numerals are as follows: 1. an energy dissipater body; 11. a connecting section; 12. a diffusion energy dissipation section; 13. a plugging section; 121. spraying a hole; 2. a pod; 21. a first flow guide section; 22. a second flow guide section; 211. a through hole; 3. an energy elimination net; 4. and connecting ribs.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the following description of the preferred embodiments of the present invention is provided in conjunction with the specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting the present patent.

As shown in fig. 1, the utility model provides a diffusion energy dissipater, include: energy dissipater body 1, kuppe 2 and energy dissipation net 3. The energy dissipater body 1 is connected with the inlet end of the flow guide cover 2 in a sealing mode, a plurality of spray holes 121 which are communicated with the flow guide cover 2 and the energy dissipater body 1 are formed in the energy dissipater body 1, and the energy dissipater body 1 can block water flow and spray outwards through the spray holes 121 to form high-speed spray flows; an energy dissipating mesh 3 is disposed within the pod 2 for receiving jets from at least some of the orifices 121.

As shown in fig. 2, the energy dissipater body 1 comprises a connecting section 11, a diffusion energy dissipation section 12 and a blocking section 13 which are connected in sequence in a sealing manner along the water flow direction. Wherein, the connecting section 11 is provided with a flange for connecting with the tail end of the pipeline; the diffusion energy dissipation section 12 is of a conical structure, and an included angle between the conical surface of the diffusion energy dissipation section and the direction of water flow is an obtuse angle, so that the flow area is sequentially reduced from left to right, and high-pressure water flow can be rapidly formed in the cavity under the cooperation of the plugging section 13, so that the water flow can be subjected to mixed energy dissipation in the cavity, and a high-speed jet flow can be formed at the spray hole 121; the spray holes 121 are arranged on the conical surface of the diffusion energy dissipation section 12 in a central symmetry manner, and spray water flow to the rear to form a diffusion energy dissipation state. The energy dissipation section 12 is preferably made of stainless steel. The plugging section 13 is a process section and can be in a seal head or flat plate type.

The air guide sleeve 2 comprises a conical first air guide section 21 and a cylindrical second air guide section 22 which are sequentially and hermetically connected along the water flow direction, the first air guide section 21 and the second air guide section 22, the connecting section 11 and the diffusion energy dissipation section 12 are respectively reinforced through connecting ribs 4, the inlet end of the first air guide section 21 is hermetically connected with the diffusion energy dissipation section 12, all the spray holes 121 are covered in the air guide sleeve 2, and the through hole 211 is formed in the first air guide section 21. The high-speed jet flow can cause negative pressure to be formed near the first flow guide section 21, the medium outside the flow guide cover 2 is sucked into the inner side of the flow guide cover 2 from the through hole 211 to form mixed flow with the high-speed jet flow, the mixed flow moves forwards, one part of the mixed flow is beaten on the energy dissipation net 3, one part of the mixed flow is beaten on the flow guide cover 2, the other part of the mixed flow is rebounded by the energy dissipation net 3 and then is fully mixed at the energy dissipation net 3 to be jetted out of the flow guide cover 2, and the optimal energy dissipation effect is achieved.

The first flow guiding section 21 is of a conical structure, and the included angle between the conical surface of the first flow guiding section and the water flow direction is an acute angle and the included angle between the conical surface of the first flow guiding section and the conical surface of the diffusion energy dissipation section 12 is 90-120 degrees. The shape of a jet flow formed by small holes arranged on the conical surface can be influenced by the size of an included angle between the conical surface and the water flow direction, and the larger the included angle between the jet flow and the axis (which is complementary to the included angle between the conical surface and the water flow direction), the faster the diffusion speed is, and the better the energy dissipation effect after passing through the small holes is. Therefore, the smaller the included angle between the conical surface and the water flow direction is, the better the energy dissipation effect is, and the larger the included angle is, the worse the energy dissipation effect is.

The total area of the through holes 211 is at least 1 time or more of the total area of the nozzle holes 121. Because the through hole is perpendicular to the surface of the spray hole, the high-speed water flow sprayed out of the spray hole can form a negative pressure effect on the inner side of the through hole. The negative pressure will suck air (or water flow) from the through hole, and mix with the jet flow to assist energy dissipation. The flow rate of the sucked air (or water flow) depends on the speed of the jet flow and the area of the through hole. Therefore, the total area of the through holes is required to be at least 1 time of the total area of the jet holes so as to ensure the effectiveness of auxiliary energy dissipation.

The energy dissipation net 3 is made of stainless steel, and the flow area of the energy dissipation net is 25-50%; the energy dissipation net 3 is fixed in the air guide sleeve 2 through the connecting ribs 4 and is of a conical structure, and the included angle between the conical surface of the energy dissipation net and the water flow direction is an obtuse angle, so that high-speed jet flow can hit the energy dissipation net, and the energy dissipation effect is achieved.

As shown in fig. 3, phia is the nominal diameter of the inlet end of the dissipater, phib is the diameter of the outlet end of the pod, and phib should be between 140% and 250% of the size of phia. After entering the equipment through A, the high-pressure and high-speed water flows through the orifice to reach the outlet of the equipment after being accelerated and then diffused and dissipated by the energy dissipation net. And finally flows to the rear, and the main energy carried by the energy flows to the rear in the form of kinetic energy. Thus, by controlling the outlet diameter, the final outflow flow rate can be controlled. The exit flow rate at control B is generally no higher than 3m/s, and the size of φ B should generally be between 140% and 250% of the size of φ A.

The spraying direction of the spraying holes 121 is coincident with the normal line perpendicular to the tangent plane of the spraying holes, and at least 60% of the projection area of the spraying holes 121 in the spraying direction can cover the energy dissipation net 3. The energy dissipation net 3 is arranged behind the jet holes 121, high-speed water flow jetted by the jet holes moves backwards along the normal direction, most of the high-speed water flow is jetted on the energy dissipation net, and the high-speed water flow is forced to decelerate and turn by using the blocking and stopping effect of the energy dissipation net on the high-speed water flow, so that the effect of further energy dissipation is achieved. Therefore, it is required that at least 60% of the area of the projection of the jet hole in the jet direction (i.e. the direction of the jet stream) should cover the energy-dissipating mesh.

The central included angle of the diffusion energy dissipation section 12 is < C, the angle C is between 40 and 90 degrees, the central included angle of the energy dissipation net is < F, and the angle F is less than < C and is between 10 and 60 degrees. C is the included angle between the conical surface and the water flow direction which is twice, the size of the included angle can influence the shape of a jet flow formed by the small holes arranged on the conical surface, the larger the included angle between the jet flow and the axis (which is the surplus of the included angle between the conical surface and the water flow direction), the faster the diffusion speed is, and the better the energy dissipation effect after passing through the small holes is. Therefore, the smaller the C, the better the energy dissipation effect, and the larger the included angle, the worse the energy dissipation effect. Therefore, C should be between 40-90 deg.. The high-speed water flow sprayed out of the conical surface is mainly sprayed on the energy dissipation net, and a small part of the water flow sprayed on the energy dissipation net passes through the energy dissipation net and flows out from the rear; most of the energy will be reflected at the energy-dissipating net and continue to flow forward. Therefore, when F is less than C, the high-speed water flow is favorably reflected and then flows backwards, and F is generally between 10 and 60 degrees.

The utility model discloses the energy dissipater can be arranged to the air, can also submerge and arrange. Specifically, the air arrangement is as follows: the energy dissipation cover is arranged at the tail end of the pipeline and exposed in the air; submerging and arranging: the energy dissipation cover is arranged at the tail end of the pipeline, placed in the water pool and surrounded by water flow.

The utility model discloses the energy dissipater can the horizontal arrangement, can also arrange perpendicularly, but when arranging perpendicularly, the side of intaking should be the bottom, and the play water side should be up. When the device is horizontally arranged: the water inlet direction is vertical to the gravity direction; when the device is vertically arranged: the water inlet direction is parallel to the gravity direction.

As shown in fig. 4, the energy dissipation principle of the present invention is as follows:

the water flow with higher pressure at the tail end of the pipeline enters the energy dissipater from the left side, and a high-speed jet flow is formed at a jet hole of the diffusion energy dissipation section of the body due to higher pressure; the high-speed jet flow can cause negative pressure to be formed near the first flow guide section of the flow guide cover, and external media of the flow guide cover are sucked into the inner side of the flow guide cover from the through hole to form mixed flow (when the energy dissipation cover is arranged in an empty state, air is sucked in, and when the energy dissipation cover is arranged in a submerged state, water is sucked in); the mixed flow moves forward, one part of the mixed flow is hit on the energy dissipation net, the other part of the mixed flow is hit on the flow guide cover, and the other part of the mixed flow is rebounded by the energy dissipation net, is fully mixed at the energy dissipation net and then is sprayed out of the flow guide cover, so that the optimal energy dissipation effect is achieved.

The foregoing is merely a preferred embodiment of the present invention, but the present invention is not limited to the specific embodiment described above. Those skilled in the art should appreciate that they can readily use the present disclosure as a basis for modifying, supplementing, or modifying other structures without departing from the principles of the invention.

Claims

1. A diffusing energy dissipater, comprising:

a flow guide sleeve (2);

the energy dissipater body (1) is connected with the inlet end of the flow guide cover (2) in a sealing mode, a plurality of spray holes (121) which are communicated with the flow guide cover (2) and the energy dissipater body (1) are formed in the energy dissipater body (1), and the energy dissipater body (1) can block water flow and spray outwards through the spray holes (121) to form high-speed spray flows; and

the energy dissipation net (3) is arranged in the air guide sleeve (2) and used for receiving jet flows from at least part of the jet holes (121).

2. A diffusing energy dissipater according to claim 1, wherein: the energy dissipater body (1) comprises a connecting section (11), a diffusion energy dissipation section (12) and a plugging section (13) which are sequentially connected in a sealing manner along the water flow direction; the diffusion energy dissipation section (12) is of a conical structure, and an included angle between the conical surface of the diffusion energy dissipation section and the water flow direction is an obtuse angle; the spray holes (121) are arranged on the conical surface of the diffusion energy dissipation section (12).

3. A diffusing energy dissipater according to claim 1 or 2, wherein: the air guide sleeve (2) is provided with a plurality of through holes (211) communicated with the outside.

4. A diffusing energy dissipater according to claim 3, wherein: the total area of the through holes (211) is at least 1 time of the total area of the spray holes (121).

5. A diffusing energy dissipater according to claim 3, wherein: the flow guide cover (2) comprises a first flow guide section (21) and a second flow guide section (22) which are sequentially connected in a sealing mode along the water flow direction, the inlet end of the first flow guide section (21) is connected with the diffusion energy dissipation section (12) in a sealing mode, all the spray holes (121) are covered in the flow guide cover (2), and the through hole (211) is formed in the first flow guide section (21).

6. A diffusing energy dissipater according to claim 5, wherein: the first flow guiding section (21) is of a conical structure, the included angle between the conical surface of the first flow guiding section and the water flow direction is an acute angle, and the included angle between the conical surface of the first flow guiding section and the conical surface of the diffusion energy dissipation section (12) is 90-120 degrees.

7. A diffusing energy dissipater according to claim 1, wherein: the energy dissipation net (3) is of a conical structure, and an included angle between the energy dissipation net and the water flow direction is an obtuse angle.

8. A diffusing energy dissipater according to claim 1, wherein: the diameter of the inlet end of the energy dissipater body (1) is 140-250% of the diameter of the outlet end of the air guide sleeve (2).

9. A diffusing energy dissipater according to claim 1, wherein: the spraying direction of the spray holes (121) is coincided with the normal line of the cross-section of the spray holes (121) perpendicular to the spray holes (121), and at least 60% of the projection area of the spray holes (121) in the spraying direction can cover the energy dissipation net (3).

10. A diffusing energy dissipater according to claim 9, wherein: the central included angle of the diffusion energy dissipation section (12) is 40-90 degrees, the central included angle of the energy dissipation net (3) is 10-60 degrees, and the central included angle of the energy dissipation net (3) is smaller than the central included angle of the diffusion energy dissipation section (12).