CN212107435U

CN212107435U - Isometric concentric pressure reduction device

Info

Publication number: CN212107435U
Application number: CN202020140316.1U
Authority: CN
Inventors: 韩金奇; 董小平; 尚延江; 刘俊杰
Original assignee: Beijing Petrochemical Engineering Co Ltd
Current assignee: Beijing Petrochemical Engineering Co Ltd
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2020-12-08
Anticipated expiration: 2030-01-21

Abstract

The utility model provides a concentric pressure reduction means of constant diameter, include: the pipeline is internally provided with axial through holes with equal diameters; the concentric orifice plate is arranged in the pipeline, a concentric hole is formed in the concentric orifice plate, and the axis of the concentric hole is collinear with the axis of the pipeline. The beneficial effects of the utility model are that, adopt the step-down technique of multistage concentric orifice plate, can will contain solid material and drop to the low pressure by the high pressure, especially to the step-down that contains solid medium, can slow down the wearing and tearing of relief pressure valve.

Description

Isometric concentric pressure reduction device

Technical Field

The utility model relates to a water under high pressure coal slurry vaporization field, concretely relates to concentric pressure reduction means of constant diameter.

Background

The device in the field of high-pressure coal water slurry vaporization has high operation pressure and operation temperature, high-pressure black water discharged by the vaporization furnace is a solid-containing material, and when the high-pressure black water is subjected to pressure reduction flash evaporation treatment, the pressure difference is large and solid is contained, so that pipelines behind a pressure reducing valve and the valve are seriously abraded. When the high-pressure medium is reduced to low pressure, an inlet pressure reducing valve is generally required to be selected, such as a return line regulating valve of a high-pressure pump outlet, and the like, and the problem of poor linear regulation is easily caused when a domestic pressure reducing valve is selected. In order to reduce the investment and purchase period of an inlet pressure reducing valve, especially for high-pressure solid-containing media such as high-pressure black water discharged by high-pressure coal water slurry vaporization, the pressure reducing valve and a pipeline behind the valve are easily abraded.

SUMMERY OF THE UTILITY MODEL

The utility model provides a concentric pressure reduction means of constant diameter to reach the high pressure and contain the purpose that solid material carries out the step-down.

The utility model provides a technical scheme that its technical problem adopted is: a constant diameter concentric pressure reduction device comprising: the pipeline is internally provided with axial through holes with equal diameters; the concentric orifice plate is arranged in the pipeline, a concentric hole is formed in the concentric orifice plate, and the axis of the concentric hole is collinear with the axis of the pipeline.

Furthermore, the concentric holes comprise a straight hole section and a taper hole section which are connected in sequence, and the small-diameter end of the taper hole section is connected with the straight hole section.

Further, the axial length of the tapered bore section is greater than half the thickness of the concentric orifice plates.

Further, the taper hole section corresponds to an angle of 90 ° to 150 °.

Furthermore, the spacing distance between the adjacent concentric orifice plates is d2, the inner diameter of the pipeline is d1, and then d2 is more than or equal to d1 and less than or equal to 2d 1.

Further, an inlet flange is arranged at the inlet end of the pipeline, and an outlet flange is arranged at the outlet end of the pipeline.

Further, the axial distance between the outlet flange and the nearest concentric orifice plate is more than three times the inner diameter of the pipe.

Furthermore, the pipeline and the concentric orifice plate are both made of stainless steel.

Further, both the pipe and the concentric orifice plate are subjected to abrasion resistant treatment.

Furthermore, the concentric orifice plates are a plurality of and are uniformly distributed in the pipeline at intervals, and the concentric orifices on each concentric orifice plate are the same.

The beneficial effects of the utility model are that, adopt the step-down technique of multistage concentric orifice plate, can will contain solid material and drop to the low pressure by the high pressure, especially to the step-down that contains solid medium, can slow down the wearing and tearing of relief pressure valve.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a concentric orifice plate;

fig. 3 is a side view of fig. 2.

Reference numbers in the figures: 1. a pipeline; 2. a concentric orifice plate; 21. a concentric bore; 4. an inlet flange; 5. an outlet flange.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 3, an embodiment of the present invention provides an isometric concentric pressure reduction device, which includes a pipeline 1 and a plurality of concentric orifice plates 2. The inner diameter of the pipe 1 gradually increases along the axial line direction connecting the inlet end of the pipe 1 and the outlet end of the pipe 1. The plurality of concentric pore plates 2 are arranged in the pipeline 1 at intervals, each concentric pore plate 2 is provided with a concentric pore 21, and the axis of each concentric pore 21 is collinear with the axis of the pipeline 1.

The pressure reduction technology of the multistage concentric orifice plate 2 is adopted, solid-containing materials can be reduced from high pressure to low pressure, and particularly, the abrasion of a pressure reduction valve can be reduced for the pressure reduction of solid-containing media.

The embodiment can be applied to depressurization of a medium containing solid particles, and the pipeline 1 and the plurality of concentric orifice plates 2 are both made of stainless steel materials. Both the pipe 1 and the plurality of concentric orifice plates 2 are subjected to wear resistant treatments including, but not limited to, bead welding of cobalt-based tungsten carbide, nickel-based tungsten carbide, or treatment with amorphous materials.

It should be noted that the concentric orifice plates 2 are a plurality of, and are uniformly distributed in the pipeline 1 at intervals, and the concentric orifices 21 on each concentric orifice plate 2 are the same, as follows:

the concentric hole 21 comprises a straight hole section and a taper hole section which are connected in sequence, and the small-diameter end of the taper hole section is connected with the straight hole section. The straight hole section faces the inlet end of the pipeline 1, the taper hole section faces the outlet end of the pipeline 1, and the size of the angle A corresponding to the taper hole section is 90-150 degrees.

The axial length D3 of the conical bore section is greater than half the thickness D1 of the concentric orifice plate 2. In this embodiment, the diameter of the straight hole section is D2, and the average diameter of the tapered hole section is larger than the diameter D2 of the straight hole section, so that when the medium passes through the concentric hole 21, the medium enters the large-diameter hole from the small-diameter hole, which is helpful to reduce the flow rate of the medium and achieve the purpose of pressure reduction.

It should be noted that the thickness D1 of each concentric orifice plate 2, the diameter D2 of the straight orifice section, and the number of the concentric orifice plates 2 are determined by calculation according to parameters such as pressure difference and flow rate.

The inner diameter of the pipeline 1 is d1, the distance between two adjacent concentric orifice plates 2 is d2, and then d2 is more than or equal to d1 and less than or equal to 2d 1.

As shown in fig. 1, the inlet end of the pipe 1 is provided with an inlet flange 4 and the outlet end of the pipe 1 is provided with an outlet flange 5. The axial distance between the outlet flange 5 and the nearest concentric orifice plate 2 is more than three times the inner diameter of the pipeline 1, and the larger the outlet is, the better the outlet is, the flow speed can be reduced, and the scouring wear can be reduced under the allowable conditions of installation space and cost.

The embodiment has simple structure, easy processing and easy replacement, and can greatly reduce the pressure difference of the pressure reducing valve, slow down the abrasion of the pressure reducing valve and a downstream pipeline and prolong the service life of a black water pressure reducing system if the pressure reducing valve is arranged at the downstream of the black water pressure reducing valve of the high-pressure coal water slurry vaporizing device.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: the pressure reduction technology of the multi-stage concentric orifice plate is adopted, solid materials can be reduced from high pressure to low pressure, and particularly, the abrasion of the pressure reduction valve can be reduced for the pressure reduction of solid media.

The above description is only for the specific embodiments of the present invention, and the scope of the present invention can not be limited by the embodiments, so that the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should still belong to the scope covered by the present patent. In addition, the utility model provides an between technical feature and the technical feature, between technical feature and the technical scheme, all can the independent assortment use between technical scheme and the technical scheme.

Claims

1. An isometric concentric pressure reduction device, comprising:

the pipeline (1) is internally provided with an axial through hole with the same diameter;

the utility model provides a pipeline, including pipeline (1), the concentric orifice plate of polylith (2), interval equipartition all is provided with the same concentric hole (21) on every concentric orifice plate (2), the axis of concentric hole (21) and the axis collineation of pipeline (1), and concentric hole (21) are including the straight hole section and the taper hole section that connect gradually, the aperture end of taper hole section with straight hole section is connected.

2. The concentric pressure reduction device of claim 1, wherein the axial length of the conical bore section is greater than half the thickness of the concentric orifice plate (2).

3. The concentric pressure reduction device of claim 1, wherein the taper segment corresponds to an angular extent of 90 ° to 150 °.

4. The concentric pressure reduction device of claim 1, wherein the distance between adjacent concentric orifice plates (2) is d2, the inner diameter of the pipe (1) is d1, and d 1. ltoreq. d 2. ltoreq.2d 1.

5. The concentric pressure reducing arrangement according to claim 1, characterized in that the inlet end of the pipe (1) is provided with an inlet flange (4) and the outlet end of the pipe (1) is provided with an outlet flange (5).

6. A concentric pressure reducing arrangement according to claim 5, characterized in that the axial distance between the outlet flange (5) and the nearest concentric orifice plate (2) is more than three times the inner diameter of the pipe (1).

7. The concentric pressure reduction device of claim 1, wherein the pipe (1) and the concentric orifice plate (2) are made of stainless steel.

8. The concentric pressure reducing arrangement according to claim 7, wherein both the pipe (1) and the concentric orifice plate (2) are treated to resist wear.