Labyrinth disc with small-flow channel and labyrinth regulating valve

Abstract

According to the labyrinth type disc with the small-flow channels and the labyrinth type adjusting valve, the multiple sets of small-flow channels are additionally arranged on the outermost side of the disc, the small-flow channels are distributed in a circuitous mode and lead to multiple layers of bosses, the bosses are bosses without acute angles, the inlets of the small-flow channels on the outer side can filter impurities, and flow channels on the inner side are not provided with backflow areas; by means of the T-shaped bosses, the auxiliary tables, the second annular bosses arranged on the radial inner sides of the T-shaped bosses at intervals and the first annular bosses arranged between the adjacent T-shaped bosses at intervals, the number of paths for fluid to enter is increased, scouring of the fluid to materials can be effectively reduced, impact erosion of solid impurities is reduced, and the service life of the materials is prolonged. And meanwhile, the valve seat area is prevented from high-speed impact, transverse vibration and magazine interference, and the service life of the valve is prolonged while the pressure reduction effect is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to disc technology field, especially relate to a labyrinth disc with small flow channel and labyrinth regulating valve. BACKGROUND

[0002] The labyrinth disc regulating valve is widely used in the industrial fields of petroleum, chemical industry, electric power and the like, especially in the case of needing to control the flow accurately under high temperature, high pressure and corrosive medium.

[0003] However, the existing labyrinth disc has the following problems:

[0004] 1. Since there are impurities in the medium flowing into the labyrinth regulating valve, when the inlet of the labyrinth disc adopts a large flow channel, the impurities will enter the sealing part along with the medium, which affects the normal use of the regulating valve and the service life of the regulating valve.

[0005] 2. The flow direction of the medium changes by a large angle at the turning part of the flow channel, and the fluid and the solid impurities in the fluid strongly scour and erode the acute angle of the metal material of the flow channel, which causes the damage of the labyrinth groove of the disc, affects the normal use of the regulating valve, and reduces the service life of the disc and the valve.

[0006] The utility model discloses a kind of labyrinth disc with small flow channel and labyrinth regulating valve, its technical scheme main points include the disc with central hole, the disc is provided with in radial arrangement several layers of boss on one side, each layer of boss includes annular arrangement and equidistantly spaced several water-drop-shaped bosses, the curvature radius of water-drop-shaped boss medium outflow end is less than the curvature radius of medium inflow end, each water-drop-shaped boss in inner layer is located at the center of its outer layer adjacent two water-drop-shaped bosses on circumference;The height of all bosses is equal, annular cofferdam lower than boss is provided on the inside of innermost layer boss;It also discloses the labyrinth regulating valve using the disc, although the flow channel of this structure has no reflux area, can reduce particulate matter erosion and block flow channel, however, it is found that still can flow into impurities in actual use, so its structure needs to be further improved. UTILITY MODEL CONTENTS

[0007] The utility model aims at the deficiency of the prior art, and provides a kind of labyrinth disc with small flow channel and labyrinth regulating valve, small flow channel is additionally arranged outside disc, and no acute angle boss is used, avoid that sealing area is impacted by high speed and transverse vibration, while guaranteeing the effect of pressure reduction, extend the service life of valve.

[0008] To solve the above technical problems, the utility model adopts the technical scheme that:

[0009] A labyrinth disc with small flow channels, comprising a disc with a central hole, and from inside to outside of the disc, an annular weir and a plurality of layers of radially arranged bosses are sequentially arranged, each layer of bosses comprises a plurality of small bosses arranged in a ring and equidistantly spaced, and each small boss in the inner layer is located at the center of the two adjacent small bosses in the outer layer in the circumference, and the height of the bosses is equal and higher than the height of the weir;

[0010] The small boss is an acute angle-free boss, and the curvature radius of the medium outflow end of the acute angle-free boss is smaller than the curvature radius of the medium inflow end.

[0011] And a plurality of groups of small flow channels are arranged at the outermost side of the disc, and the small flow channels are arranged in a detour and lead to the plurality of layers of bosses.

[0012] The small flow channel comprises a T-shaped boss, a second annular boss arranged in the radial inner side of the T-shaped boss, and a first annular boss arranged between adjacent T-shaped bosses, and the second annular boss is symmetrically arranged with two gaps, and the center of the gap coincides with the center of the small boss in the radial inner side.

[0013] The horizontal section of the T-shaped boss is located in the radial inner side, and the center of the T-shaped boss is located at the center of the gap between the two second annular bosses.

[0014] The two sides of the T-shaped boss and the first annular boss are also provided with auxiliary bosses, and the auxiliary bosses are located at the outermost edge of the disc.

[0015] The center of the gap of the second annular boss of the two adjacent groups of small flow channels coincides with the center of the first annular boss in the radial outer side.

[0016] The minimum distance between the two adjacent acute angle-free bosses on each different layer is arranged to be approximately equal in the circumference.

[0017] A labyrinth regulating valve, comprising a valve body, a valve seat ring, a valve cover, a valve stem, a valve core coupled with the valve stem, a plurality of discs overlapping between the valve seat ring and the valve cover, a central medium port in the valve body communicating with the inner hole of the valve seat ring, and an outer circular medium port communicating with the outer side of all discs, the disc is a labyrinth disc with small flow channels, the valve core cooperates with the central hole of the labyrinth disc with small flow channels and the inner hole of the valve seat ring;

[0018] The outer circular medium port is a medium inlet, and the central medium port is a medium outlet.

[0019] The beneficial effects of the present application are:

[0020] The labyrinth disc with small flow channels and the labyrinth regulating valve, through adding multiple groups of small flow channels at the outermost side of the disc, the small flow channels are arranged in a detour and lead to multiple layers of bosses, and the bosses adopt non-acute angle bosses, the small flow channel inlets at the outer side can filter impurities, the inner flow channel has no backflow area, through the T-shaped bosses, the auxiliary bosses, the second annular bosses arranged at the radial inner side of the T-shaped bosses and the first annular bosses arranged between adjacent T-shaped bosses, the path of fluid entering is increased, the erosion of the fluid to the material can be more effectively reduced, the impact erosion of solid impurities is reduced, meanwhile, the valve seat area is prevented from high-speed impact, transverse vibration and interference of impurities, the service life of the valve is prolonged while the pressure reduction effect is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 is the front view of the labyrinth disc of the utility model;

[0022] Fig. 2 is the side view of the labyrinth disc of the utility model;

[0023] Fig. 3 is the structural schematic view of the labyrinth regulating valve. DETAILED DESCRIPTION

[0024] The embodiments of the utility model are described below by specific examples, and those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification.

[0025] Please refer to Figs. 1-3 It should be understood that the structure, proportion, size and the like shown in the drawings attached to the specification are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the limiting conditions that the utility model can be implemented, so they do not have technical significance, any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that the utility model can produce, should be within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" in the specification are only for the convenience of clear understanding of the description, and are not used to limit the scope of the utility model that can be implemented, the change or adjustment of relative relationship, without substantially changing the technical content, is also regarded as the scope of the utility model that can be implemented.

[0026] The utility model provides a kind of labyrinth disc with small flow channel, as Figs. 1-3 It is shown.

[0027] A labyrinth disc with small flow channels, comprising a disc 1 with a central hole 2, and from inside to outside of the disc 1, an annular weir 3 and a plurality of layers of radially arranged bosses, each layer of bosses comprising a plurality of small bosses arranged in a circle and equidistantly spaced, and each small boss of the inner layer is located at the center of the two adjacent small bosses of the outer layer in the circle, and the height of the bosses is equal and higher than the height of the weir 3;

[0028] The small boss is an acute angle-free boss 4, and the curvature radius of the medium outflow end of the acute angle-free boss 4 is smaller than the curvature radius of the medium inflow end;

[0029] And a plurality of groups of small flow channels 5 are arranged at the outermost side of the disc 1, and the small flow channels 5 are arranged in a detour and lead to the plurality of layers of bosses.

[0030] The small flow channel 5 comprises a T-shaped boss 51, a second annular boss 53 arranged in the radial inner side of the T-shaped boss 51, and a first annular boss 52 arranged between adjacent T-shaped bosses, and the second annular boss 53 is symmetrically arranged with two gaps, and the center of the gap coincides with the center of the small boss located in the radial inner side.

[0031] The horizontal section of the T-shaped boss 51 is located in the radial inner side and the center of the T-shaped boss 51 is located at the center of the gap between the two second annular bosses 53. The center of the gap between the second annular bosses 53 of the adjacent two groups of small flow channels coincides with the center of the first annular boss 52 located in the radial outer side.

[0032] The two sides of the T-shaped boss 51 and the first annular boss 52 are also provided with auxiliary bosses 54, and the auxiliary bosses 54 are located at the outermost edge of the disc 1. The height of the T-shaped boss 51, the first annular boss 52, the second annular boss 53 and the auxiliary boss 54 is equal to the height of the boss on the disc.

[0033] In this embodiment, the minimum distance a between the two adjacent acute angle-free bosses on each different layer in the circle is arranged to be substantially equal.

[0034] A labyrinth regulating valve, comprising a valve body 6, a valve seat ring 7, a valve cover 9, a valve stem 8, a valve core 10 coupled with the valve stem 8, a plurality of discs 1 overlapped between the valve seat ring 7 and the valve cover 9, a central medium port 11 in the valve body 6 communicating with the inner hole of the valve seat ring 7, and an outer circular medium port 12 communicating with the outer side of all discs 1, the disc is the above-mentioned labyrinth disc with small flow channels, the valve core 10 cooperates with the central hole 2 of the labyrinth disc with small flow channels and the inner hole of the valve seat ring 7. The outer circular medium port 12 is a medium inlet, and the central medium port 11 is a medium outlet.

[0035] The plurality of small flow channels 5 in each layer of the disc are arranged in a ring shape and are equidistantly spaced from the non-right-angle protrusions 4, and each non-right-angle protrusion 4 in the inner layer is located at the center of the two adjacent non-right-angle protrusions in the outer layer in the circumferential direction, so that a continuous turning labyrinth flow channel is formed between the non-right-angle protrusions 4, and the fluid continuously undergoes the process of flow channel contraction-flow channel expansion-flow channel contraction-flow channel expansion and realizes multi-stage turning, and the fluid collides with itself in the flow channel, thereby consuming fluid energy and gradually reducing the pressure.

[0036] However, the angle of each turning of the fluid is small, far lower than the turning of the existing disc, and the flow channel has no backflow area, and the added small flow channels 5 on the outer side increase the path of the fluid when entering, which can reduce the entry of particulate matter into the flow channel, and the non-right-angle protrusions 4 can effectively reduce the impact of the fluid "impact angle" on the material, reduce the impact erosion of solid impurities, and prolong the service life of the disc and the valve.

[0037] As shown in the accompanying drawings, Fig. 3 When the regulating valve using the disc is used to pass liquid medium, the medium flows from the small flow channels 5 on the outer side of the disc 1 to the center hole 2, and the two non-right-angle protrusions 4 on different layers with substantially equal minimum spacing a in the circumferential direction are used to maintain the flow rate substantially unchanged while reducing the pressure; at the same time, the low weir 3 intercepts all the downward ring flow, avoids the valve seat area from being eroded by high-speed impact, uniformly guides the fluid to the center hole, and guides the fluid into the center area of the valve seat 7, so that the valve seat area is free from lateral vibration and high-speed impact, thereby prolonging the service life of the disc and the valve.

[0038] In the patent, the words "first", "second", etc. are used to limit the parts. Those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the utility model and simplifying the description, and the above words do not have special meanings.

[0039] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and equivalents.

[0040] In the description of the utility model, need understanding is, the term "front", "back", "left", "right", "center", etc. Indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only is for the convenience of describing the utility model and simplifying the description, and is not indicating or implying that the indicated device or element must have a particular orientation, a particular orientation structure and operation, and therefore cannot be understood as a limitation on the protection content of the utility model.

[0041] In the description of the utility model, it should be explained that, unless otherwise expressly provided and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixed connection, or it can be detachable connection, or integrally connected; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

Claims

1. A labyrinth-type disk with a small flow channel, comprising a disk with a central hole, and the disk being provided with an annular dam and multiple layers of protrusions arranged radially from the inside to the outside. Each layer of protrusions includes multiple small protrusions arranged in an annular pattern and at equal intervals. Each small protrusion in the inner layer is located at the center of two adjacent small protrusions in the outer layer on the circumference. The height of the protrusions is equal and higher than the height of the dam. Its features are: The small protrusion is a protrusion without acute angles, and the radius of curvature of the medium outflow end of the protrusion without acute angles is smaller than the radius of curvature of the medium inflow end. On the outermost side of the disk, there are multiple sets of low-flow channels, which are arranged in a circuitous manner and lead to multiple layers of protrusions.

2. The labyrinthine disk with a low-flow-rate channel according to claim 1, characterized in that: The low-flow channel includes a T-shaped boss, a second annular boss arranged at intervals on the radial inner side of the T-shaped boss, and a first annular boss arranged at intervals between adjacent T-shaped bosses. The second annular boss is symmetrically arranged at intervals, and the center of the gap between them coincides with the center of the small boss located on the radial inner side.

3. A labyrinthine platter with a low-flow-rate channel according to claim 2, characterized in that: The horizontal section of the T-shaped boss is located radially inward, and its center is located at the center of the gap between the two second annular bosses.

4. A labyrinthine disk with a low-flow-rate channel according to claim 2, characterized in that: Auxiliary platforms are provided on both sides of the T-shaped boss and between the first annular boss, and the auxiliary platforms are located at the outermost edge of the disk.

5. A labyrinthine disk with a low-flow-rate channel according to claim 2, characterized in that: The center of the gap between the second annular protrusions of the two adjacent sets of low-flow channels coincides with the center of the first annular protrusion located radially outward.

6. A labyrinthine disk with a low-flow-rate channel according to claim 1, characterized in that: The minimum spacing between two adjacent bosses without acute angles on each different layer is approximately equal.

7. A labyrinth-type regulating valve, comprising a valve body, a valve seat ring, a valve cover, a valve stem, a valve core connected to the valve stem, and several overlapping discs placed between the valve seat ring and the valve cover, wherein the valve body is provided with a central medium port communicating with the inner hole of the valve seat ring and an outer circular medium port communicating with the outer side of all the discs, characterized in that: The disc is a labyrinth disc with a small flow channel as described in any one of claims 1 to 6, and the valve core is matched with the central hole of the labyrinth disc with the small flow channel and the inner hole of the valve seat ring. The outer circular medium inlet is the medium inlet, and the central medium inlet is the medium outlet.

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