CN217653239U - Labyrinth type valve cage structure - Google Patents

Abstract

The utility model discloses a labyrinth valve cage structure, including the valve cage, the valve cage includes the drum structure of compriseing a plurality of upper and lower discs that set up side by side, every the multistage step-down passageway of formula of sinking is all seted up to the upper surface of disc, the inner circle of drum structure inserts the barrel core in the location, the through-hole has been seted up to the position that corresponds with multistage step-down passageway on the barrel core in the location, and interference fit between barrel core and the disc in the location, the utility model discloses set up the barrel core in the location to not interference fit between barrel core and the disc in the location, so the disc can be positioned on the barrel core in the location again horizontal direction, makes things convenient for the equipment of disc, has set up the arc recess on the disc, has set up first locating column on covering, passes the arc recess with first locating column, and the bolt compresses tightly again, can be positioned each disc again in the vertical direction totally, and convenient equipment, and the alignment of each multistage step-down passageway is also comparatively convenient.

Description

Labyrinth type valve cage structure

Technical Field

The utility model relates to a valve cage technical field specifically is a labyrinth valve cage structure.

Background

Labyrinth type multistage decompression control valve is the latest generation at present, has control valve of higher technical content, and the valve internals have advanced labyrinth type decompression structure. The problems of high pressure difference and high flow rate (such as cavitation, noise, vibration, scouring and the like) are successfully solved by the special structural design of the valve internals of the multistage pressure reduction control valve. The device can be widely applied to power plants, petroleum, chemical industry, natural gas and occasions with extremely harsh operating conditions, and meets the special requirements on working conditions of liquid, steam and gas;

the design principle of the existing labyrinth multi-stage pressure reduction control valve is that a plurality of annular discs are stacked to form a throttling channel passing through the control valve, the annular discs form a fluid passage in modes of electro-corrosion, laser (linear) cutting or casting and the like, the fluid passage is tortuous, fluid is forced to be throttled and passes through a tortuous flow passage, and the purpose of one-stage pressure reduction is achieved when the fluid passes through a bend angle. In the process, the kinetic energy of the fluid is consumed, the flow velocity of the fluid is reduced, and the effect of multi-stage pressure reduction is achieved;

this multiple disc stack configuration is inconvenient to assemble and the alignment of the various multi-stage depressurization flow paths is inconvenient.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a labyrinth valve cage structure to solve among the prior art the inconvenient problem of aiming at of the inconvenient equipment of a plurality of disks of labyrinth valve cage structure and multistage decompression runner.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a labyrinth valve cage structure, includes the valve cage, the valve cage includes the drum structure of constituteing by a plurality of upper and lower discs that set up side by side, every the multistage decompression passageway of formula of sinking is all seted up to the upper surface of disc, the inner circle of drum structure has inserted the interior section of thick bamboo core of location, the through-hole has been seted up with the position that multistage decompression passageway corresponds in the location on the section of thick bamboo core, and interference fit between section of thick bamboo core and the disc in the location.

Preferably, the outer surface of the positioning inner cylinder core and the staggered position of the through hole are uniformly provided with at least one second positioning column, and the position of the inner ring of the disk, which corresponds to the second positioning column, is provided with a positioning groove matched with the second positioning column.

Preferably, the upper end of the positioning inner cylinder core is provided with an integrated limiting ring, and the outer diameter of the limiting ring is larger than the inner diameter of the positioning inner cylinder core.

Preferably, the upper surface of the cylinder consisting of the plurality of discs is provided with an upper cover, and the lower end of the cylinder is provided with a bottom cover.

Preferably, the outer surface of the disc and the staggered positions of the multistage depressurization channels are uniformly provided with at least two arc-shaped grooves, the lower surface of the upper cover is fixedly connected with the positions corresponding to the arc-shaped grooves through first positioning columns, and the first positioning columns sequentially penetrate through the arc-shaped grooves and the bottom cover and then are connected with bolts through threads

Preferably, the length of the arc-shaped groove is greater than one half of an arc.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model is provided with the positioning inner cylinder core, and the positioning inner cylinder core is not in interference fit with the disc, so the disc can be positioned on the positioning inner cylinder core in the horizontal direction, and the disc is convenient to assemble;

2. the second positioning column is arranged outside the positioning inner cylinder core, so that the disc can not move on the positioning inner cylinder core;

3. the utility model discloses set up the arc recess on the disc, set up first reference column on the upper cover, pass the arc recess with first reference column, reuse the bolt and compress tightly, can be with each disc in the vertical direction again by the complete positioning, convenient equipment, the alignment of each multistage step-down passageway is also comparatively convenient.

Drawings

The accompanying drawings 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 view of the installation of the present invention cage;

FIG. 2 is a front view of the cage of the present invention;

FIG. 3 is a schematic diagram of the arrangement of the disks of the present invention;

fig. 4 is a schematic structural view of the bottom cover of the present invention;

FIG. 5 is a schematic view of the positioning inner cylinder core of the present invention;

fig. 6 is a top view of the disc of the present invention.

In the figure: 1. a valve body; 2. a valve cavity; 3. a valve stem; 4. a plug; 5. a valve cage; 51. a disk; 511. a multi-stage pressure reduction channel; 512. an arc-shaped groove; 52. an upper cover; 53. a first positioning post; 54. positioning the inner cylinder core; 541. a through hole; 542. a second positioning column; 543. a limiting ring; 55. a bottom cover; 56. and (4) bolts.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, 2, 3 and 6, in an embodiment of the present invention, a labyrinth valve cage structure includes a valve cage 5 inside a valve body 1, where the valve cage 5 includes a cylindrical structure composed of a plurality of disks 51 arranged side by side, and a sunken multistage pressure-reducing channel 511 is formed on an upper surface of each disk 51, that is, when a valve rod 3 drives a plug 4 to move upward, an external liquid may enter an inner end through an outer end of the multistage pressure-reducing channel 511, and then flow downward through a cavity in the center of the cylindrical structure, and enter the inside of the valve cavity 2 to flow out from a left end of the valve body;

as shown in fig. 2, fig. 3, fig. 5 and fig. 6, a positioning inner cylinder core 54 is inserted into the inner ring of the cylinder structure, a through hole 541 is formed in the positioning inner cylinder core 54 at a position corresponding to the multistage depressurization channel 511, the positioning inner cylinder core 54 and the disks 51 are in interference fit, after the positioning inner cylinder core 54 is inserted into the inner ring of the cylinder structure, the disks 51 are locked on the positioning inner cylinder core 54 in the horizontal direction due to the interference fit of the positioning inner cylinder core and the disks 51, and the liquid in the multistage depressurization channel 511 can reach the center of the cylinder structure through the through hole 541 so as to reach the inside of the valve chamber 2;

as shown in fig. 2, fig. 3, fig. 5 and fig. 6, in order to avoid the rotation of the disc 51 on the outer surface of the positioning inner cylinder core 54, at least one second positioning column 542 is uniformly arranged at a position where the outer surface of the positioning inner cylinder core 54 is staggered from the through hole 541, and a positioning groove matched with the second positioning column 542 is formed at a position corresponding to the second positioning column 542 on the inner ring of the disc 51, that is, when the positioning inner cylinder core 54 is inserted into the cylindrical structure, the second positioning column 542 is aligned with the positioning groove, so that the rotation of the disc 51 can be limited, and the positioning of the disc 51 in the horizontal direction is further ensured;

with reference to fig. 2, 3, 5 and 6, preferably, an integrated limiting ring 543 is disposed at the upper end of the positioning inner cylinder core 54, and the outer diameter of the limiting ring 543 is greater than the inner diameter of the positioning inner cylinder core 54, so as to prevent the positioning inner cylinder core 54 from being excessively inserted into the cylinder structure;

as shown in fig. 2, 3 and 4, in order to tightly lock each disk 51 in the vertical direction, an upper cover 52 is disposed on the upper surface of a cylinder formed by a plurality of disks 51, and a bottom cover 55 is disposed at the lower end of the cylinder, preferably, at least two arc-shaped grooves 512 are uniformly formed on the outer surface of each disk 51 at positions staggered from the multistage depressurization channel 511, a first positioning column 53 is fixedly connected to the lower surface of the upper cover 52 at a position corresponding to the arc-shaped groove 512, the first positioning column 53 sequentially passes through the arc-shaped grooves 512 and the bottom cover 55 and is then threadedly connected with a bolt 56, that is, by screwing the bolt, each disk 51 can be pressed, on one hand, each disk 51 is locked in the vertical direction, on the other hand, each disk 51 can be sealed, only the multistage depressurization channel 511 has liquid flowing through, and further, in order to prevent the first positioning column 53 from escaping from the arc-shaped groove 512, where the length of the arc-shaped groove 512 is greater than a half arc, so as to wrap the first positioning column 53 in the arc-shaped groove 512.

The utility model discloses a theory of operation is: when the valve cage 5 is assembled, the arc-shaped groove 512 of each disk 51 is aligned with the first positioning column 53, the first positioning column 53 passes through the corresponding arc-shaped groove 512, after a plurality of disks 51 are positioned on the disks 51 side by side, the first positioning column 53 passes through the bottom cover 55, is screwed by using the bolt 56, and then the inner ring of the cylindrical structure is inserted into the positioning inner cylinder core 54 (the second positioning column 542 needs to be aligned with the positioning groove, so that the rotation of the disks 51 can be limited), and because of the interference fit of the two, each disk 51 can be locked on the positioning inner cylinder core 54 in the horizontal direction;

after the valve cage 5 is installed inside the valve body 1, the valve rod 3 moves upwards to drive the plug 4 to move upwards so as to be separated from the valve cage 5, and the liquid can be depressurized inside the multistage depressurization channel 511, then reaches the inside of the valve cavity 2 through the through hole 541, and is discharged out of the valve body 1.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. A labyrinth-type valve cage structure, includes valve cage (5), its characterized in that: valve cage (5) include the drum structure of constituteing by a plurality of upper and lower disc (51) that set up side by side, every sunken multistage decompression passageway (511) have all been seted up to the upper surface of disc (51), barrel core (54) in the inner circle of drum knot has been inserted and has been fixed a position, through-hole (541) have been seted up with the position that multistage decompression passageway (511) corresponds in barrel core (54) in the location, and interference fit between barrel core (54) and disc (51) in the location.

2. A labyrinth-type cage structure as defined in claim 1, wherein: the outer surface of the positioning inner cylinder core (54) and the staggered position of the through hole (541) are uniformly provided with at least one second positioning column (542), and the position of the inner ring of the disc (51) corresponding to the second positioning column (542) is provided with a positioning groove matched with the second positioning column (542).

3. A labyrinth-type cage structure as defined in claim 1 or 2, wherein: the upper end of the positioning inner cylinder core (54) is provided with an integrated limiting ring (543), and the outer diameter of the limiting ring (543) is larger than the inner diameter of the positioning inner cylinder core (54).

4. A labyrinth-type cage structure as defined in claim 1, wherein: an upper cover (52) is arranged on the upper surface of the cylinder consisting of the plurality of discs (51), and a bottom cover (55) is arranged at the lower end of the cylinder.

5. A labyrinth-type cage structure as set forth in claim 4, wherein: the outer surface of disc (51) and the position that multistage step-down passageway (511) stagger have seted up two at least arc recesses (512) evenly, the lower surface of upper cover (52) has first locating column (53) with the position rigid coupling that arc recess (512) correspond, and threaded connection has bolt (56) behind arc recess (512) and bottom (55) in proper order in first locating column (53).

6. A labyrinth valve cage structure as recited in claim 5, wherein: the length of the arc-shaped groove (512) is more than one half of an arc.

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