CN216242386U - Multistage cage labyrinth decompression governing valve - Google Patents

Abstract

The utility model discloses a labyrinth type pressure reduction regulating valve with a multi-stage cage cover, relates to the technical field of valves, and can enable the regulation of the valves to be more accurate. The pressure reducing valve comprises a valve body and a valve rod, wherein a pressure reducing piece is arranged in a valve body middle cavity of the valve body, a middle cavity channel and a plurality of flow channels with pressure reducing functions are arranged in the pressure reducing piece, and the flow channels are positioned on the cavity wall of the middle cavity channel at different axial positions of the middle cavity channel; one end of the middle cavity channel is communicated with an input port of the valve body, the input port can be communicated with an output port of the valve body through each flow channel, a throttling piece connected with the end part of the valve rod is inserted into the other end of the middle cavity channel in a penetrating mode, and the throttling piece can move in the middle cavity channel along the axial direction of the middle cavity channel and sequentially block the flow channels. According to the utility model, through the matching of the flow channel and the throttling element, the continuous adjustment of the valve can be met, so that the adjustment of the valve is more accurate.

Description

Multistage cage labyrinth decompression governing valve

Technical Field

The utility model relates to the technical field of valves, in particular to a multi-stage cage labyrinth type pressure reduction regulating valve.

Background

In the current market, a cage type step-by-step pressure reduction valve under the working conditions of high temperature and high pressure difference generally adopts a cage type step-by-step pressure reduction structure, after the pressure reduction of one stage, media need to converge together and then the pressure reduction of the next stage is carried out, and if the working condition of too large pressure difference occurs, a valve body needs to be made large so as to arrange a cage corresponding to the required pressure reduction stage; in addition, the structure that current multistage cage cover adopted can't carry out accurate continuity regulation.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: provided is a pressure reducing regulating valve which can make the regulation of the valve more accurate.

The utility model is realized by the following technical scheme:

a multi-stage cage labyrinth decompression regulating valve comprises a valve body and a valve rod, wherein a valve body middle cavity is arranged in the valve body, a decompression piece is arranged in the valve body middle cavity, a middle cavity channel and a plurality of flow channels with decompression functions are arranged in the decompression piece and extend outwards from the cavity wall of the middle cavity channel, and one ends of the flow channels, facing the middle cavity channel, are positioned at different axial positions of the middle cavity channel on the cavity wall of the middle cavity channel;

one end of the middle cavity channel is communicated with an input port of the valve body, the input port can be communicated with an output port of the valve body through each flow channel, a throttling piece connected with the end part of the valve rod is inserted into the other end of the middle cavity channel in a penetrating mode, and the throttling piece can move in the middle cavity channel along the axial direction of the middle cavity channel and sequentially block the flow channels.

Preferably, the flow channel comprises a plurality of small holes which are sequentially arranged at intervals, large holes are respectively communicated between the adjacent small holes, the cross-sectional area of each large hole is far larger than that of the adjacent small holes, and the two small holes which are respectively arranged at the two ends of the flow channel are respectively communicated with the middle cavity and the middle cavity of the valve body.

Further optionally, the number of small holes is six and the number of large holes is five.

Optionally, the cross-sectional areas of the small holes increase one by one in a direction away from the middle channel, and the cross-sectional areas of the large holes increase one by one in a direction away from the middle channel.

Optionally, the axes of adjacent apertures are staggered or parallel.

Optionally, the two small holes disposed on two adjacent sides of the same large hole are communicated with edges of two opposite sides of the same large hole, axes of the two large holes disposed on two adjacent sides of the same small hole are located on the same side of the same small hole, and axes of the large hole and the small hole located in the same flow channel are located in the same plane.

Optionally, one end of the flow channel facing the middle cavity is sequentially and uniformly arranged along the axis and the circumferential direction of the middle cavity.

Optionally, the pressure reduction piece is established including the cover multilayer cage outside the throttling element, the cage with valve body fixed connection, wherein every layer of cage covers and all is equipped with a plurality of punch combinations, the punch combination includes a macropore and/or a aperture, every punch combination that every cage covered can form a runner with the cooperation of all corresponding punch combinations that all the other cages covered respectively.

Further optionally, the cage that is in the most inboard in the cage is fixed cage, the one end of fixed cage dorsad input port is equipped with the fixed boss of outside extension, the one end of fixed cage towards the input port and the one side of fixed boss dorsad input port supports respectively and leans on the opposite both sides chamber wall in valve body lumen, the one side of fixed boss towards the input port with the chamber wall cooperation in valve body lumen forms the axial fixed slot that is used for the card to establish all the other cages.

Further optionally, a radial fixing groove for placing one end of each cage cover facing the input port is formed in the cavity wall of one side, close to the input port, of the middle cavity of the valve body, and the groove wall of the radial fixing groove abuts against the outer side wall of the cage cover located on the outermost side.

The utility model has the following advantages and beneficial effects:

1. according to the multi-stage cage cover labyrinth type pressure reduction regulating valve provided by the utility model, the continuous regulation of the valve can be met through the matching of the flow channel and the throttling element, so that the regulation of the valve is more accurate.

2. According to the multi-stage cage cover labyrinth type pressure reduction regulating valve provided by the utility model, through the matching of the small hole and the large hole, each flow passage has a multi-stage pressure reduction function, so that the medium pressure in the flow passage is gradually reduced step by step, the confluence process after each stage of pressure reduction in the regulating valve is removed, the space required by confluence is reduced, the valve mechanism is more compact, and the production cost of the valve is lower.

3. According to the labyrinth type pressure reduction regulating valve with the multi-stage cage cover, the manufacturing of the pressure reduction piece is facilitated through the arrangement of the multi-stage cage cover, the cage cover is limited by the axial fixing groove and the radial fixing groove, and the pressure reduction performance of the pressure reduction piece is prevented from being influenced due to the fact that the cage cover is axially displaced or radially deformed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the principles of the utility model. In the drawings:

FIG. 1 is a sectional view of a valve according to embodiment 1 of the present invention;

FIG. 2 is a detail view taken at A in FIG. 1;

FIG. 3 is a schematic flow path diagram of example 1 of the present invention;

FIG. 4 is a schematic developed view of the cage of example 1 of the present invention.

Reference numbers and corresponding part names in the drawings:

1-valve body, 11-valve body middle cavity, 12-input port, 13-output port, 2-valve rod, 21-throttling element, 3-decompression element, 31-middle cavity channel, 32-flow channel, 321-small hole, 322-big hole, 33-cage cover, 331-fixed cage cover, 332-fixed boss, 333-axial fixed slot and 334-radial fixed slot.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail so as not to obscure the present invention.

Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the utility model. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "upper", "lower", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the scope of the present invention.

Example 1:

a multi-stage cage labyrinth decompression regulating valve is shown in figures 1 to 4 and comprises a valve body 1 and a valve rod 2, wherein a valve body middle cavity 11 is arranged in the valve body 1, a decompression part 3 is arranged in the valve body middle cavity 11, a middle cavity 31 and a plurality of flow passages 32 with decompression function are arranged in the decompression part 3, the flow passages 32 extend outwards from the cavity wall of the middle cavity 31, and one ends of the flow passages 32 facing the middle cavity 31 are positioned at different axial positions of the middle cavity 31 on the cavity wall of the middle cavity 31;

one end of the middle cavity channel 31 is communicated with an input port 12 of the valve body 1, the input port 12 can be communicated with an output port 13 of the valve body 1 through each flow channel 32, a throttling piece 21 connected with the end part of the valve rod 2 is inserted into the other end of the middle cavity channel 31 in a penetrating mode, and the throttling piece 21 can move in the middle cavity channel 31 along the axial direction of the middle cavity channel 31 and sequentially block the flow channels 32.

The medium which needs to be depressurized is input from the input port 12, sequentially flows through the intermediate cavity 31, the flow channels 32 and the valve body middle cavity 11, and is output from the output port 13, wherein the medium is depressurized through the flow channels 32, and because the connecting position of each flow channel 32 and the intermediate cavity 31 is at different axial positions of the intermediate cavity 31, the throttling piece 21 is driven by the adjusting valve rod 2 to move in the intermediate cavity 31, the number of the flow channels 32 which are not blocked can be adjusted according to requirements, and further the output flow of the valve is adjusted. Through the cooperation of runner 32 and orifice 21, can satisfy the continuity regulation of valve for the regulation of valve is more accurate.

For the flow channel 32, in one or more embodiments, the flow channel 32 includes a plurality of small holes 321 sequentially arranged at intervals, a large hole 322 is respectively communicated between adjacent small holes 321, the cross-sectional area of the large hole 322 is much larger than that of the adjacent small holes 321, wherein the two small holes 321 respectively arranged at two ends of the flow channel 32 are respectively communicated with the intermediate cavity 31 and the valve body middle cavity 11.

The shape of the big holes 322 and the small holes 321 is preferably cylindrical or prismatic, and the end surfaces of the small holes 321 are connected with the two side end surfaces of the adjacent big holes 322. Which is shown as a cylinder.

The process of entering the large hole 322 through the small hole 321 has an expansion and pressure reduction effect on the medium input from the input port 12, wherein each small hole 321 cooperates with the adjacent large hole 322 arranged away from the intermediate channel 31 to form a pressure reduction group, and in addition, the cavity 11 in the valve body can cooperate with the small holes 321 furthest away from the intermediate channel 31 to form a pressure reduction group, that is, each flow passage 32 has the same number of pressure reduction groups as the small holes 321. Therefore, each flow passage 32 has a multi-stage pressure reduction function, so that the medium pressure in the flow passage 32 gradually decreases in stages, the confluence process after each stage of pressure reduction in the original regulating valve is eliminated, the space required for confluence is reduced, the mechanism of the valve is more compact, and the production cost of the valve is lower.

It should be noted that the area of the large hole 322 is much larger than the area of the small holes 321 adjacent to both sides, and the area relationship between the non-adjacent small holes 321 and the large hole 322 is not required.

As shown in fig. 1 to 3, the number of the small holes 321 is six, and the number of the large holes 322 is five. I.e., six pressure reduction groups per flow channel 32.

Wherein, in one or more embodiments, the cross-sectional areas of the small holes 321 increase one by one in a direction away from the middle channel 31, and the cross-sectional areas of the large holes 322 increase one by one in a direction away from the middle channel 31.

Therefore, the pressure reduction amplitude can be ensured to be gentle at every time, and the influence on the normal use of the valve due to the large noise or vibration caused by the overlarge pressure reduction amplitude is avoided.

It should be noted that, if the axes of the small holes 321 located on two adjacent sides of the same large hole 322 are overlapped, when the medium flows into the large hole 322 from the large hole 322 to the small hole 321 on one side of the middle channel 31, most of the medium may directly enter another small hole 321 under the action of the pressure, and will not stay in the large hole 322, at this time, the pressure reduction set cannot perform complete expansion and pressure reduction, and the pressure reduction performance of the flow channel 32 will be affected to a certain extent.

Thus, in one or more embodiments, the axes of adjacent apertures 321 are staggered or parallel. Thereby, two adjacent small holes 321 are staggered on the large hole 322, so that the medium stays in the large hole 322, and the pressure reduction performance of the flow channel 32 is ensured.

In one or more embodiments, as shown in fig. 3, two small holes 321 disposed on two adjacent sides of the same large hole 322 are communicated with two opposite side edges of the same large hole 322, axes of two large holes 322 disposed on two adjacent sides of the same small hole 321 are located on the same side of the same small hole 321, and axes of the large hole 322 and the small hole 321 located in the same flow channel 32 are located in the same plane. This minimizes the installation space required for each flow channel 32, thereby reducing the volume required for the valve body 1.

In one or more embodiments, the ends of the flow passages 32 facing the intermediate channels 31 are uniformly arranged in sequence along the axis and the circumferential direction of the intermediate channels 31.

That is, one end of each of the flow channels 32 is uniformly arranged along the axis of the middle channel 31 and is simultaneously uniformly arranged along the circumferential direction of the middle channel 31, that is, the axial distance between two adjacent flow channels 32 is always the same, and the radial included angle between the two adjacent flow channels is always the same, and at this time, the connecting lines of the ends of all the flow channels 32 form a spiral line arranged along the axis of the middle channel 31. At this time, the flow rate of the valve and the displacement of the throttling piece 21 are more definite, so that an operator can adjust the flow rate of the indicating valve when operating the valve rod 2 to drive the throttling piece 21 to move; the flow channels 32 which are arranged uniformly in the circumferential direction of the intermediate channel 31 are therefore offset in the pressure reduction element 3, which facilitates the arrangement of the flow channels 32 and ensures sufficient wall thickness between two adjacent flow channels 32, thereby ensuring the strength of the pressure reduction element 3.

In one or more embodiments, the pressure reducing member 3 includes a plurality of layers of cages 33 sleeved outside the throttling member 21, the cages 33 are fixedly connected to the valve body 1, wherein each layer of cage 33 is provided with a plurality of hole sets, each hole set includes a large hole 322 and/or a small hole 321, and each hole set on each cage 33 can be respectively matched with corresponding hole sets on all the other cages 33 to form a flow passage 32.

Namely, the plurality of layers of cages 33 sleeved outside the throttling element 21 are matched with each other through each hole group to form the flow passage 32, wherein each hole group of each cage 33 is provided with a large hole 322 or a small hole 321 or a hole formed by mutually communicating one large hole 322 and one small hole 321, so that the flow passage 32 can be manufactured by respectively processing each cage 33, and the manufacturing of the pressure reducing element 3 is facilitated.

As shown in fig. 3, each cage 33, except for the outermost cage 33, has a group of holes, one large hole 322 and one small hole 321 communicating with each other, forming a pressure reduction group, said small hole 321 being located on the side of said large hole 322 facing the intermediate channel 31. Since the valve body central chamber 11 can also cooperate with the small holes 321 furthest from the central channel 31 to form a pressure reduction group, only one small hole 321 needs to be provided in the outermost hole group of the cage 33.

Wherein adjacent cages 33 should be as close together as possible to avoid leakage of the medium between the two cages 33.

Wherein the cage 33 is shown in an expanded view in figure 4.

In one or more embodiments, the innermost cage 33 of the cages 33 is a fixed cage 331, one end of the fixed cage 331 facing away from the input port 12 is provided with a fixing boss 332 extending outward, one end of the fixed cage 331 facing the input port 12 and one side of the fixing boss 332 facing away from the input port 12 respectively abut against two opposite side chamber walls of the valve body middle chamber 11, and one side of the fixing boss 332 facing the input port 12 and the chamber walls of the valve body middle chamber 11 cooperate to form an axial fixing groove 333 for clamping the rest of the cages 33.

Through the restriction of valve body lumen 11 to fixed cage 331, make fixed cage 331 be in enough stable in the valve body lumen 11, simultaneously through the setting of axial fixed slot 333, restrict the axial displacement of other cages 33, avoid when stepping down to the medium, produce axial displacement by the influence of pressure or vibrations between the cage 33, cause the flow area between aperture 321 and the macropore 322 of same runner 32 to reduce and even take place the condition of staggering each other, ensure that the step-down function of decompression piece 3 is enough stable.

The chamber in the fixed cage 331 is the middle channel 31, and not only needs to receive the medium which is not subjected to depressurization from the input port 12, but also is used for opening and closing the flow channel 32 in cooperation with the extrusion piece, so in order to ensure the service life of the component, it is preferable that the thickness of the fixed cage 331 is greater than that of the rest of the cages 33.

In one or more embodiments, the cavity 11 of the valve body on the side close to the input port 12 is provided with a radial fixing groove 334 for placing one end of all the cages 33 facing the input port 12, and the groove wall of the radial fixing groove 334 abuts against the outer side wall of the outermost cage 33.

Through the extrusion of the outer side wall of the outermost cage 33 by the groove wall of the radial fixing groove 334, a radial restraining force is generated on the cage 33, so that the cage 33 is prevented from being radially deformed by the extrusion of a medium, the medium is leaked from a gap between the cages 33, and the pressure reduction performance of the pressure reduction member 3 is affected.

In addition, a plurality of screws are inserted into one end of each of the other cages 33 except the fixed cage 331, which faces away from the input port 12, and the screws are also inserted into the fixed cage 331, and can be matched with the radial fixing grooves 334 to radially constrain the two ends of each of the cages 33, so that the adjacent cages 33 are tightly attached to each other, and a gap through which a medium can flow out does not occur.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. The multi-stage cage labyrinth decompression regulating valve is characterized by comprising a valve body (1) and a valve rod (2), wherein a valve body middle cavity (11) is arranged in the valve body (1), a decompression piece (3) is arranged in the valve body middle cavity (11), a middle cavity (31) and a plurality of flow passages (32) with decompression function are arranged in the decompression piece (3), the flow passages (32) extend outwards from the cavity wall of the middle cavity (31), and one ends of the flow passages (32) facing the middle cavity (31) are located at different axial positions of the middle cavity (31) on the cavity wall of the middle cavity (31);

one end of middle chamber way (31) communicates with input port (12) of valve body (1), input port (12) can communicate through delivery outlet (13) of each runner (32) with valve body (1), the other end interlude of middle chamber way (31) have with valve rod (2) end connection's throttling element (21), throttling element (21) can be in follow in middle chamber way (31) the axial displacement of middle chamber way (31) is right in proper order runner (32) carry out the shutoff.

2. The labyrinth type pressure reducing and regulating valve with the multi-stage cage cover as claimed in claim 1, wherein the flow passage (32) comprises a plurality of small holes (321) which are sequentially arranged at intervals, a large hole (322) is respectively communicated between the adjacent small holes (321), the cross-sectional area of the large hole (322) is far larger than that of the adjacent small holes (321), and the two small holes (321) which are respectively arranged at two ends of the flow passage (32) are respectively communicated with the intermediate cavity passage (31) and the valve body middle cavity (11).

3. The labyrinth decompression valve according to claim 2, characterized in that the number of small holes (321) is six and the number of large holes (322) is five.

4. The labyrinth decompression and regulation valve according to claim 2, characterized in that the cross-sectional area of the small holes (321) increases one by one in the direction away from the intermediate channel (31), and the cross-sectional area of the large holes (322) increases one by one in the direction away from the intermediate channel (31).

5. The labyrinth decompression and regulation valve according to claim 2, characterized in that the axes of adjacent orifices (321) are staggered or parallel.

6. The labyrinth type pressure reducing and regulating valve with the multi-stage cage cover as claimed in claim 5, wherein two small holes (321) arranged at two adjacent sides of the same large hole (322) are communicated with two opposite side edges of the same large hole (322), the axes of the two large holes (322) arranged at two adjacent sides of the same small hole (321) are positioned at the same side of the same small hole (321), and the axes of the large hole (322) and the small hole (321) positioned in the same flow channel (32) are positioned in the same plane.

7. The labyrinth decompression and regulation valve with multi-stage cages according to claim 2, wherein the ends of the flow passages (32) facing the intermediate channels (31) are arranged uniformly in sequence along the axis and the circumferential direction of the intermediate channels (31).

8. The labyrinth type pressure reducing and regulating valve with the multi-stage cage cover as claimed in claim 2, characterized in that the pressure reducing member (3) comprises a plurality of layers of cage covers (33) which are sleeved outside the throttling member (21), the cage covers (33) are fixedly connected with the valve body (1), wherein each layer of cage cover (33) is provided with a plurality of hole groups, each hole group comprises a large hole (322) and/or a small hole (321), and each hole group on each cage cover (33) can be respectively matched with corresponding hole groups on all the other cage covers (33) to form a flow channel (32).

9. The labyrinth decompression and regulation valve with the multi-stage cage cover as claimed in claim 8, wherein the innermost cage cover (33) of the cage covers (33) is a fixed cage cover (331), one end of the fixed cage cover (331) facing away from the inlet (12) is provided with a fixing boss (332) extending outwards, one end of the fixed cage cover (331) facing the inlet (12) and one side of the fixing boss (332) facing away from the inlet (12) are respectively abutted against two opposite side chamber walls of the valve body middle chamber (11), and one side of the fixing boss (332) facing the inlet (12) and the chamber walls of the valve body middle chamber (11) cooperate to form an axial fixing groove (333) for clamping the rest of the cage covers (33).

10. The labyrinth type pressure reducing and regulating valve with the multiple stages of cages as claimed in claim 9, is characterized in that the wall of the side of the valve body middle chamber (11) close to the inlet (12) is provided with a radial fixing groove (334) for placing one end of all the cages (33) facing the inlet (12), and the wall of the radial fixing groove (334) is abutted against the outer side wall of the cage (33) at the outermost side.

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