阅读说明：本技术 一种用于大坝锥形阀的二级旋流消能装置 (Secondary rotational flow energy dissipation device for dam conical valve ) 是由 杜维松 于等文 徐龙军 王祥国 张玉才 梁锦江 于 2019-09-26 设计创作，主要内容包括：一种用于大坝锥形阀的二级旋流消能装置,它属于水利水电技术领域,以解决现有的锥形阀采用外部消能,而现有的锥形阀本身消能效率低的问题。本发明包括壳体、第一套筒、第二套筒、第一螺旋叶片和第二螺旋叶片；壳体、第一套筒和第二套筒由外向内依次设置且相邻两者之间形成空腔,壳体、第一套筒和第二套筒三者同心,壳体、第一套筒和第二套筒均设置在锥形阀出口的一侧,壳体与第一套筒之间的空腔内设置有第一螺旋叶片,第一螺旋叶片固定在壳体的内壁上,第一套筒与第二套筒之间的空腔设置有第二螺旋叶片,第一螺旋叶片与第二螺旋叶片的旋向相反,第一螺旋叶片和第二螺旋叶片的表面均设置有多个凸起,与第二套筒出口一侧设置有锥形导流板。(The utility model provides a second grade whirl energy dissipator for dam cone valve, it belongs to water conservancy and hydropower technical field to solve current cone valve and adopt outside energy dissipation, and the problem of current cone valve energy dissipation inefficiency itself. The invention comprises a shell, a first sleeve, a second sleeve, a first helical blade and a second helical blade; the casing, first sleeve and second sleeve outside-in set gradually and adjacent vacuole formation between the two, the casing, first sleeve and second sleeve three are concentric, the casing, first sleeve and second sleeve all set up the one side in the toper valve export, be provided with first helical blade in the cavity between casing and the first sleeve, first helical blade fixes on the inner wall of casing, cavity between first sleeve and the second sleeve is provided with second helical blade, first helical blade is opposite with second helical blade's the direction of turning round, first helical blade and second helical blade's surface all is provided with a plurality of archs, be provided with the toper guide plate with second sleeve export one side.)

1. The utility model provides a second grade whirl energy absorber for dam cone valve which characterized in that: the spiral blade type compressor comprises a shell (1), a first sleeve (2), a second sleeve (3), a first spiral blade (4) and a second spiral blade (5);

the casing (1), the first sleeve (2) and the second sleeve (3) are sequentially arranged from outside to inside and form a cavity between the casing (1), the first sleeve (2) and the second sleeve (3) which are concentric, the casing (1), the first sleeve (2) and the second sleeve (3) are all arranged on one side of an outlet of the cone valve, a first helical blade (4) is arranged in the cavity between the casing (1) and the first sleeve (2), the first helical blade (4) is fixed on the inner wall of the casing (1), a second helical blade (5) is arranged in the cavity between the first sleeve (2) and the second sleeve (3), the rotating directions of the first helical blade (4) and the second helical blade (5) are opposite, a plurality of bulges 9 are arranged on the surfaces of the first helical blade (4) and the second helical blade (5), a cone-shaped guide plate (7) fixedly connected with the casing (1) is arranged on one side of the outlet of the second sleeve (3), the end part of the conical guide plate (7) is fixedly connected with a ring plate (8) with a semicircular cross section, and the conical guide plate (7) is opposite to the second sleeve (3) and is away from the end part of the second sleeve (3) by a certain distance.

2. A two-stage vortex energy dissipater for a dam cone valve according to claim 1, wherein: the end of the first sleeve (2) on the outlet side extends out from the end of the second sleeve (3) on the outlet side.

3. A two-stage vortex energy dissipater for a dam cone valve according to claim 1, wherein: the middle section of the second sleeve (3) is a corrugated sleeve.

4. A two-stage vortex energy dissipater for a dam cone valve according to claim 3, wherein: a conical cylinder (6) is fixedly connected to the water inlet side of each of the first sleeve (2) and the shell (1).

5. A two-stage vortex energy dissipater for a dam cone valve according to claim 4, wherein: the cone angle (alpha) of the respective conical cylinders (6) on the first sleeve (2) and the housing (1) is 15-45 degrees.

6. A two-stage vortex energy dissipater for a dam cone valve according to claim 5, wherein: the projection area of the conical guide plate (7) along the axial direction is larger than or equal to the cross-sectional area of the outlet of the second sleeve (3).

Technical Field

The invention belongs to the technical field of water conservancy and hydropower, and relates to an energy dissipation device, in particular to an energy dissipation device for a dam conical valve.

Background

The existing dam cone valve generally adopts the empty discharge or the submerged discharge, high-speed water flow at the outlet of the cone valve is eliminated by means of external energy dissipation measures, and the energy dissipation efficiency of the cone valve is low.

Disclosure of Invention

The invention provides a two-stage rotational flow energy dissipater for a dam cone valve to solve the problems.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the spiral blade type compressor comprises a shell, a first sleeve, a second sleeve, a first spiral blade and a second spiral blade;

the casing, first sleeve and second sleeve outside-in set gradually and adjacent vacuole formation between the two, the casing, first sleeve and second sleeve three are concentric, the casing, first sleeve and second sleeve all set up the one side in the toper valve export, be provided with first helical blade in the cavity between casing and the first sleeve, first helical blade fixes on the inner wall of casing, be provided with second helical blade in the cavity between first sleeve and the second sleeve, first helical blade is opposite with second helical blade's the direction of turning, first helical blade and second helical blade's surface all is provided with a plurality of archs, second sleeve export one side is provided with the toper guide plate with the casing rigid coupling, the tip rigid coupling of toper guide plate has the cross section to be the crown of a circle, the toper guide plate just is certain distance just to just with the tip of second sleeve with the second sleeve.

Further, an end portion of the outlet side of the first sleeve protrudes from an outlet end of the second sleeve.

Further, the middle section of the second sleeve is a corrugated sleeve.

Furthermore, a conical cylinder is fixedly connected to one side of the water inlet of each of the first sleeve and the housing.

Compared with the prior art, the invention has the following beneficial effects:

firstly, the invention is provided with a first helical blade and a second helical blade, the rotation directions of the two helical blades are opposite, high-speed water flow flowing out from a conical valve port respectively enters a cavity between a shell and a first sleeve and a cavity between the first sleeve and a second sleeve, two vortexes with opposite rotation directions are generated by the action of the first helical blade and the second helical blade, a plurality of bulges are arranged on the surfaces of the first helical blade and the second helical blade, the friction of the water flow between the first helical blade and the second helical blade is increased, a part of energy is eliminated, the two helical vortexes with opposite rotation directions disturb through interaction when flowing out from the cavity between the shell and the first sleeve and the cavity between the first sleeve and the second sleeve, the energy of water is further eliminated, and at the moment, the energy of the water sprayed from the cavity between the shell and the first sleeve and the cavity between the first sleeve and the second sleeve is lower, the high-speed water is sprayed out through the second sleeve and is mixed with the water with lower energy in the second sleeve, so that the energy of the high-speed water flow is reduced.

The end part of the guide plate is fixedly connected with a ring plate with a semicircular arc cross section, so that when passing water flows through the conical guide plate, a vortex is formed at the ring plate, the vortex has a disturbance effect on surrounding water, and the energy of water ejection is further reduced.

And thirdly, the invention adopts two helical blades, and the guide plate is arranged at the position right opposite to the second sleeve, so that the water flow is divided into three steps from the center to the outside to dissipate energy one by one, and finally, the water flow is mixed at the outlet.

Drawings

FIG. 1 is a schematic view of the present invention, with the arrows indicating the direction of water flow;

fig. 2 is a plan view of the first helical blade 4.

Detailed Description