CN221300526U - Pipeline multi-stage orifice plate energy dissipation device - Google Patents

Abstract

The utility model provides a pipeline multistage orifice plate energy dissipation device, includes the sleeve pipe, and sleeve pipe inner chamber installs and is fixed with a plurality of throttle plates and separates a plurality of adjacent energy dissipation chamber with the inner chamber, and the entry and the export orifice quantity of each energy dissipation chamber is different, and each energy dissipation chamber entry side and export side the position of orifice staggers in the intracavity fluid flow direction, and the fluid in the energy dissipation chamber is gaseous, liquid, according to the order from entry to export, and the equivalent aperture of each throttle plate increases in proper order, and the orifice entry is the toper. The multi-stage orifice plate energy dissipation device of the pipeline has the advantages of simple structure, convenient installation and maintenance, good energy dissipation effect and low noise and vibration; the use effect and the safety of the energy dissipation device can be effectively improved, and the safe operation of equipment and pipelines is ensured.

Description

Pipeline multi-stage orifice plate energy dissipation device

Technical Field

The utility model relates to a pipeline system energy dissipation device for reducing fluid pressure required by a steam-water pipeline, in particular to a pipeline multi-stage orifice plate energy dissipation device.

Background

The multi-stage orifice plate energy dissipation device is widely applied to pipeline systems requiring reduction of fluid pressure, such as a steam pipeline system. The prior pipeline multi-stage orifice plate energy dissipation device, as shown in figure 1, comprises a sleeve 1a, wherein a plurality of throttle plates 2a arranged at intervals are welded and fixed in the sleeve, and the middle parts of the throttle plates are provided with throttle holes 8a which are opposite and have the same size. The fluid is suddenly contracted and suddenly expanded between the throttle plates at each stage, the relative movement between the liquid drops is enhanced by changing the solid boundary of the fluid, and the collision and friction intensity between the liquid drops is improved, so that the energy is converted into heat energy, and the heat energy flows away along with the fluid, thereby achieving the purpose of energy dissipation. However, the orifice apertures of the throttle plates at each level are equal and opposite, the disturbance of the fluid in the cavity between the plates is small, the pressure difference between the inlet and the outlet is small, and the energy dissipation effect is poor; the opposite orifices have the advantages that the high-speed fluid entering from the orifice at the inlet side directly reaches the outlet side and is directly accelerated to be sprayed from the outlet side, cavitation and flash evaporation of the fluid are easy to cause, larger vibration and noise are generated, and the safe operation of equipment and pipelines is adversely affected. In addition, the throttle plate fixed in a welding mode is adopted, welding is carried out in the pipe, the operation is difficult and troublesome, the positioning accuracy and the welding quality are difficult to ensure, and in long-time operation, particularly under the condition of cavitation and flash evaporation which occur frequently, the welding spots are easy to loosen, so that the normal operation of the energy dissipation device is greatly influenced.

Disclosure of utility model

The utility model aims to provide a pipeline multi-stage orifice plate energy dissipation device which has good energy dissipation effect and can reduce cavitation and flash evaporation occurrence probability.

The utility model relates to a multi-stage orifice plate energy dissipation device of a pipeline, which comprises a sleeve, wherein a plurality of throttle plates are fixedly arranged in the inner cavity of the sleeve to divide the inner cavity into a plurality of adjacent energy dissipation cavities, throttle holes are arranged at the inlet and the outlet of each energy dissipation cavity, the throttle holes at the two sides are different in number, the positions of the throttle holes at the inlet side and the outlet side of each energy dissipation cavity are staggered in the flowing direction of fluid in the cavity, and the equivalent pore diameters of the throttle plates are sequentially increased according to the sequence from the inlet to the outlet.

According to the multi-stage orifice plate energy dissipation device for the pipeline, the inlet orifices and the outlet orifices of each energy dissipation cavity are staggered, the fluid inlet orifices and the fluid outlet orifices need to be changed, and the fluid turbulence is larger, so that the collision and friction intensity between liquid drops in the cavities is increased, more energy is converted into heat energy, and the heat energy flows away along with the fluid, so that the energy dissipation effect is better. Meanwhile, the staggered outlet orifices and inlet orifices can greatly reduce the situation that fluid entering from the inlet directly enters the outlet and is directly discharged from the outlet orifices, so that the probability of cavitation and flash evaporation can be greatly reduced, and the vibration and noise caused by the probability and the adverse effect on the safe operation of equipment and pipelines can be reduced. In addition, the energy dissipation cavity outlet side throttle plate is sequentially increased relative to the throttle hole equivalent aperture of the inlet side throttle plate, so that the pressure drop at the two sides of the throttle hole can be always maintained in a more reasonable state under the condition that the fluid energy dissipation pressure is gradually reduced step by step, and the flash evaporation of the energy dissipation cavity at the back due to the too low pressure is better avoided.

Drawings

FIG. 1 is a schematic diagram of a prior art pipeline multi-stage orifice plate energy dissipating device.

Fig. 2 is a first schematic diagram of a pipeline multi-stage orifice plate energy dissipater structure.

Fig. 3 is a second schematic view of a piping multi-stage orifice plate energy dissipating device structure.

Fig. 4 is a third schematic diagram of a pipeline multi-stage orifice plate energy dissipating device structure.

Description of the embodiments

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the embodiment of the present utility model, directional indications (such as up, down, left, right, front, back, top, bottom, inner, outer, vertical, lateral, longitudinal, counterclockwise, clockwise, circumferential, radial, axial … …) are referred to, and the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

Term interpretation section: the terms "mounted," "connected," "secured," and the like in the present disclosure are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the terms are used herein as specific meanings as understood by those of ordinary skill in the art, and are not limited to the following terms.

If there is a description of "first" or "second" etc. in an embodiment of the present utility model, the description of "first" or "second" etc. is used for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

As shown in fig. 2, a multi-stage orifice plate energy dissipation device for a pipeline comprises a sleeve 1, a plurality of throttle plates 20 are installed and fixed in the inner cavity of the sleeve at intervals to separate the inner cavity into a plurality of adjacent energy dissipation cavities 30, the inlets and outlets of the energy dissipation cavities are respectively provided with throttle holes 80, the throttle holes on two sides are different in number, the positions of the throttle holes on the inlet side and the throttle holes on the outlet side of each energy dissipation cavity are staggered in the flowing direction of fluid in the cavity, the fluid in the energy dissipation cavity is gas and liquid, and the equivalent aperture of each throttle plate is sequentially increased by the sleeve according to the sequence from the inlet to the outlet.

The inlets of the energy dissipation cavities are provided with an orifice, and the outlets of the energy dissipation cavities are provided with two orifices; or the inlet is provided with two orifices and the outlet is provided with one orifice; or the inlet is provided with two orifices, the outlet is provided with three orifices, and the inlet can be provided with three orifices while the outlet is provided with two orifices; so long as they are staggered from each other and are different in number.

For the throttle plate with more than two throttle holes, the throttle holes 80 are arranged in a circumferential direction by taking the central axis of the throttle plate 20 as a reference, so that the stress is more uniform, and the vibration can be reduced.

As shown in fig. 3, in the multi-stage orifice plate energy dissipating device for a pipeline, a limiting sleeve 40 can be arranged between the throttle plates 20 and can be abutted against the throttle plates at two ends. Through the arrangement of the limiting sleeve, the throttle plate can be prevented from moving; meanwhile, the installation distance between the throttle plates at all levels can be ensured only by ensuring the length precision of the limit sleeve, and the installation precision of the throttle plate is ensured, so that the problems that the throttle plates at all levels are not installed in place, the distance is too small, and the actual blocking pressure difference of the throttle plates is smaller than a calculated value to cause cavitation are prevented.

As shown in fig. 4, the limiting sleeve and the throttle plate at the front side can be integrated into a cylindrical structure 5, which further simplifies the installation, ensures the spacing of the energy-saving plates and simultaneously can better ensure the sealing between the energy dissipation cavities at all levels.

The supporting rings 7 can be arranged on the front side of the first throttle plate and the rear side of the last throttle plate in the sleeve cavity to support the throttle plates on two sides, so that the stress capability is enhanced, and the play of the throttle plates on two sides is better prevented.

The throttle hole can be a straight hole section 9 and a taper hole section 8 which are connected in sequence, the small diameter end of the taper hole section is connected with the straight hole section, and the large diameter end of the taper hole section faces the inlet direction of the sleeve. The conical flow channel can reduce vibration and noise generated by fluid flow disturbance, and the stability of the flow field is improved so that the fluid flow change is more gentle.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (6)

1. The utility model provides a multistage orifice plate energy dissipation device of pipeline, includes sleeve pipe (1), and sleeve pipe inner chamber fixed mounting has a plurality of throttle plates (20) to separate a plurality of adjacent energy dissipation chamber (30) with the inner chamber, its characterized in that: the inlets and outlets of the energy dissipation cavities are provided with orifices, the numbers of the orifices at the two sides are different, the positions of the orifices at the inlet side and the outlet side of the energy dissipation cavities are staggered in the flowing direction of fluid in the cavities, and the equivalent pore diameters of the throttle plates (20) are sequentially increased according to the sequence from the inlet to the outlet.

2. The multi-stage orifice plate energy dissipating device for a pipeline according to claim 1, wherein the orifice (80) comprises a straight hole section (9) and a taper hole section (8) which are sequentially connected, the small diameter end of the taper hole section is connected with the straight hole section, and the large diameter end of the taper hole section faces the inlet direction of the sleeve.

3. The multi-stage orifice plate energy dissipating device of claim 1, wherein the orifice plate (20) has more than two orifices, and the orifices (80) are circumferentially arranged with respect to a central axis of the orifice plate.

4. The multi-stage orifice plate energy dissipating device for the pipeline according to claim 1, wherein a limiting sleeve (40) is further arranged between the sleeve (1) and the throttle plate (20).

5. The multi-stage orifice plate energy dissipating device of claim 4, wherein the stop collar (40) is integral with the adjacent throttle plate (20) as a tubular structure (5).

6. A pipe multistage orifice plate energy dissipating device according to any of claims 1-5, wherein the sleeve lumen is provided with support rings (7) at the front side of the first throttle plate and the rear side of the last throttle plate.