CN216742857U - String type multi-stage pressure reduction regulating valve - Google Patents
String type multi-stage pressure reduction regulating valve Download PDFInfo
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- CN216742857U CN216742857U CN202220090546.0U CN202220090546U CN216742857U CN 216742857 U CN216742857 U CN 216742857U CN 202220090546 U CN202220090546 U CN 202220090546U CN 216742857 U CN216742857 U CN 216742857U
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Abstract
The utility model provides a multistage step-down governing valve of string formula which characterized in that: a valve cage and a plurality of throttling barrels which are connected in series layer by layer from top to bottom are arranged in the middle cavity of the valve body, the upper end of the valve cage is abutted against the valve cover, a plurality of through holes are formed in the side wall of the valve cage, and the throttling barrel at the lowest end is abutted against the valve seat; the throttling cylinder is arranged in a hollow mode, a guide hole matched with the valve core is formed in the upper end of the throttling cylinder, and a plurality of adjusting flow guide surfaces which are obliquely arranged are formed in the position, corresponding to the throttling cylinder, of the outer side wall of the valve core. The throttling cylinder is arranged in a multi-layer serial connection mode, the throttling cylinder is matched with the adjusting flow guide surface formed on the valve element, the medium can be depressurized layer by layer from top to bottom, the flow velocity is reduced, the extra-high voltage working condition is suitable, the inclined surface is formed on the outer side wall of the valve element and serves as the adjusting flow guide surface, and compared with an adjusting structure in a conventional groove shape, the throttling cylinder can be suitable for the working condition with the granular medium, and the problem of blocking and jamming is avoided.
Description
Technical Field
The utility model relates to a regulating valve, in particular to a string type multi-stage pressure reduction regulating valve.
Background
The regulating valve is an important component in an industrial automatic control system and is mainly used for regulating technological parameters such as flow, pressure and the like of a medium. According to the control signal of the automatic system, the opening of the valve is automatically adjusted, and the flow and the pressure of the medium in the pipeline are accurately controlled in real time.
A valve cage is usually arranged in a flow passage inside a valve body of some high-pressure regulating valves, and the valve cage, a valve rod, a valve core and other opening and closing parts are coaxially positioned and installed, so that medium flow can be effectively attenuated, the high-pressure working condition is adapted, the stable structure of the valve rod and the valve core is ensured, and the action is flexible.
However, under the working condition of extra-high voltage, the conventional valve cage has poor pressure reduction effect, and the accurate regulation of the flow can be influenced by overhigh pressure difference and flow velocity.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the background art, the utility model provides a serial multistage pressure reduction regulating valve.
The technical scheme adopted by the utility model is as follows: a string type multi-stage pressure reduction regulating valve comprises a valve body, a valve cover, a valve seat, a valve rod and a valve core; the valve body comprises an inlet channel, an outlet channel and a middle cavity, the outlet channel is communicated with the bottom of the middle cavity, and the valve cover is arranged at the upper end of the valve body; the valve seat is arranged at the connecting part of the bottom of the middle cavity and the outlet channel, and the valve rod penetrates through the valve cover and is connected with the valve core; a valve cage and a plurality of throttling cylinders which are connected in series layer by layer from top to bottom are arranged in the middle cavity of the valve body, the upper end of the valve cage is abutted against the valve cover, a plurality of circulation holes are formed in the side wall of the valve cage, and the throttling cylinder at the lowest end is abutted against the valve seat; the throttling cylinder is arranged in a hollow mode, a guide hole matched with the valve core is formed in the upper end of the throttling cylinder, and a plurality of inclined adjusting flow guide surfaces are formed on the outer side wall of the valve core corresponding to the throttling cylinder.
A first annular positioning boss is formed at the upper end of the valve seat, and the throttling cylinder at the lowest end is sleeved outside the first annular positioning boss and is in positioning fit with the center of the first annular positioning boss.
A second annular positioning boss is formed at the upper end of the throttling cylinder, and the valve cage and the adjacent throttling cylinder are in center positioning fit through the second annular positioning boss.
And a third annular positioning boss is formed at the upper end of the valve cage, and the valve cage is in center positioning fit with the valve seat through the third annular positioning boss.
The throttle cylinder is equipped with 3.
The packing device is characterized in that a packing sealing assembly is arranged between the valve rod and the valve cover, the packing sealing assembly sequentially comprises a packing gasket, a lower packing, a first lip-shaped sealing ring, a packing spacer ring, an upper packing, a second lip-shaped sealing ring, a packing pressing sleeve and a packing pressing plate from bottom to top, and the packing pressing plate is fixedly connected with the valve cover through a stud, a stud and a bolt and compresses the packing pressing sleeve.
The utility model has the beneficial effects that: scheme more than adopting sets up the throttle cylinder that the multilayer concatenated, and the cooperation is formed the regulation water conservancy diversion face on the case, and the medium can be from last to stepping down layer by layer, reduces the velocity of flow, is suitable for extra-high voltage operating mode, and for the regulation structure of conventional cell type, can be applicable to in the operating mode of taking the granule medium, avoids appearing blockking up the card and hinders the problem through forming the inclined plane at the case lateral wall in addition as adjusting the water conservancy diversion face.
Drawings
Fig. 1 is a schematic structural diagram of a tandem multi-stage pressure-reducing regulating valve according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a valve core according to an embodiment of the utility model.
Detailed Description
The embodiments of the utility model will be further described with reference to the accompanying drawings in which:
as shown in the figure, the string type multi-stage pressure reduction regulating valve comprises a valve body 1, a valve cover 2, a valve seat 3, a valve rod 4, a valve core 5, a valve cage 6 and a plurality of throttling cylinders 7.
The valve body 1 is formed with an inlet channel 11, an outlet channel 12 and a middle cavity 13, wherein the outlet channel 12 is communicated with the bottom of the middle cavity, namely, a medium circulation mode of high inlet and low outlet is adopted.
The valve cover 2 is installed at the upper end of the valve body 1, the valve cover 2 and the valve body 1 are fixedly locked through a stud and a nut, and a gasket is wound through metal to guarantee reliable sealing between the valve cover 2 and the valve body 1.
The bottom of the middle cavity 13 of the valve body 1 is provided with a valve seat mounting groove, the valve seat 3 is embedded in the valve seat mounting groove, and a metal winding gasket is also arranged between the valve seat 3 and the valve body 1 so as to ensure reliable sealing between the valve seat 3 and the valve body 1.
The valve cage 6 and the throttling cylinder 7 are arranged in the middle cavity 13 of the valve body 1, wherein 3 throttling cylinders 7 are arranged and are connected in series layer by layer from top to bottom, the upper end of the valve cage 6 is abutted with the valve cover 2, a plurality of circulation holes 61 are formed in the side wall of the valve cage 6, and the throttling cylinder at the lowest end is abutted with the valve seat 3.
The upper end of the valve seat 3 is formed with a first annular positioning boss 31, and the lowest throttling cylinder is sleeved outside the first annular positioning boss 31 and is in center positioning fit with the first annular positioning boss 31. A second annular positioning boss 72 is formed at the upper end of the throttle cylinder 7, and the valve cage 6 and the adjacent throttle cylinder 7 are in center positioning fit through the second annular positioning boss 72. The upper end of the valve cage 6 is provided with a third annular positioning boss 62, and the valve cage 6 is in central positioning fit with the valve seat 2 through the third annular positioning boss 62. During assembly, after the valve seat 3, the throttling cylinder 7 and the valve cage 6 are sequentially arranged, the valve cover 2 is arranged, the mutual positioning installation can be conveniently realized through the positioning boss structures, the positioning is accurate, the installation is convenient, and in addition, the valve seat 3, the throttling cylinder 7, the valve cage 6 and the valve cover 2 can be ensured to be coaxially positioned in the center through the positioning boss structures during working, the structure is stable, and the valve rod and the valve core can be ensured to flexibly act.
One end of the valve rod 4 is connected with an actuator for driving the valve rod to act, the other end of the valve rod passes through the valve cover 2 and the valve cage 6 and then is connected with the valve core 5, the valve core 5 penetrates through the throttling cylinder 7 and then corresponds to the valve seat 3, and a sealing surface capable of sealing corresponding to the valve seat 3 is formed at the lower end of the valve core 5. The throttle cylinder 7 is hollow, a guide hole 71 matched with the valve core 5 is formed at the upper end of the throttle cylinder 7, and an inclined adjusting guide surface 51 is formed on the outer side wall of the valve core 5 corresponding to the throttle cylinder 7.
The packing seal assembly 9 is arranged between the valve rod 4 and the valve cover 2, the packing seal assembly 9 sequentially comprises a packing gasket 91, a lower packing 92, a first lip-shaped seal ring 93, a packing spacer ring 94, an upper packing 95, a second lip-shaped seal ring 96, a packing pressing sleeve 97 and a packing pressing plate 98 from bottom to top, and the packing pressing plate 98 is fixedly connected with the valve cover 2 through a stud, a stud and a bolt and compresses the packing pressing sleeve 97. Adopt lip seal circle effect packing seal assembly, medium pressure can strut the lip seal circle, and pressure is big more, and is sealed better, adopts multiunit lip seal circle moreover, forms multichannel sealed, consequently can further ensure the sealed between valve gap 2 and the valve rod 4, satisfies high-pressure operating mode.
When above-mentioned valve is opened, the medium can enter into in the valve cage 6 from the opening 61 of valve cage 6, then from last to down through throttle section of thick bamboo 7 layer upon layer, flow out from disk seat 3 at last, set up the throttle section of thick bamboo 7 that the multilayer concatenated, the cooperation is formed at the regulation water conservancy diversion face 51 on the case, the medium is from last when circulating down, can step down layer upon layer, reduce the velocity of flow, consequently, can be suitable for extra-high voltage operating mode, and through forming the inclined plane as adjusting water conservancy diversion face 51 at 5 lateral walls of case, for the regulation structure of conventional cell type, can be applicable to in the operating mode of taking the granule medium, avoid appearing blockking up the card and hinder the problem.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The skilled person should understand that: although the present invention has been described in terms of the above embodiments, the inventive concepts are not limited to the embodiments, and any modifications that utilize the inventive concepts are intended to be included within the scope of the appended claims.
Claims (6)
1. A string type multi-stage pressure reduction regulating valve comprises a valve body (1), a valve cover (2), a valve seat (3), a valve rod (4) and a valve core (5); the valve body (1) comprises an inlet channel (11), an outlet channel (12) and a middle cavity (13), the outlet channel (12) is communicated with the bottom of the middle cavity, and the valve cover (2) is installed at the upper end of the valve body (1); the valve seat (3) is arranged at the connecting part of the bottom of the middle cavity (13) and the outlet channel (12), and the valve rod (4) penetrates through the valve cover (2) and is connected with the valve core (5);
the method is characterized in that: a valve cage (6) and a plurality of throttling cylinders (7) which are connected in series layer by layer from top to bottom are arranged in the middle cavity (13) of the valve body (1), the upper end of the valve cage (6) is abutted against the valve cover (2), a plurality of circulation holes (61) are formed in the side wall of the valve cage (6), and the throttling cylinder at the lowest end is abutted against the valve seat (3);
the throttling cylinder (7) is arranged in a hollow mode, a guide hole (71) matched with the valve core (5) is formed in the upper end of the throttling cylinder, and a plurality of obliquely arranged adjusting flow guide surfaces (51) are formed in the position, corresponding to the throttling cylinder (7), of the outer side wall of the valve core (5).
2. The tandem multi-stage pressure reducing regulating valve according to claim 1, wherein: a first annular positioning boss (31) is formed at the upper end of the valve seat (3), and the throttling cylinder at the lowest end is sleeved outside the first annular positioning boss (31) and is in center positioning fit with the first annular positioning boss (31).
3. The cascade multi-stage pressure reducing regulator valve of claim 2, wherein: a second annular positioning boss (72) is formed at the upper end of the throttling cylinder (7), and the valve cage (6) and the adjacent throttling cylinder (7) are in center positioning fit through the second annular positioning boss (72).
4. The tandem multi-stage pressure reducing regulating valve according to claim 3, wherein: the valve is characterized in that a third annular positioning boss (62) is formed at the upper end of the valve cage (6), and the valve cage (6) is in center positioning fit with the valve seat through the third annular positioning boss (62).
5. The tandem multi-stage pressure reducing regulating valve according to claim 1, wherein: the number of the throttling cylinders (7) is 3.
6. The tandem multi-stage pressure reducing regulating valve according to claim 1, wherein: be equipped with packing seal assembly (9) between valve rod (4) and valve gap (2), packing seal assembly (9) are from supreme packing gasket (91), lower packing (92), first lip sealing washer (93), packing spacer ring (94), upward pack (95), second lip sealing washer (96), packing pressure cover (97), packing clamp plate (98) of including in proper order down, packing clamp plate (98) and valve gap (2) are through double-screw bolt, bolt fixed connection to compress tightly packing and press cover (97).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220090546.0U CN216742857U (en) | 2022-01-14 | 2022-01-14 | String type multi-stage pressure reduction regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220090546.0U CN216742857U (en) | 2022-01-14 | 2022-01-14 | String type multi-stage pressure reduction regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216742857U true CN216742857U (en) | 2022-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220090546.0U Active CN216742857U (en) | 2022-01-14 | 2022-01-14 | String type multi-stage pressure reduction regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216742857U (en) |
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2022
- 2022-01-14 CN CN202220090546.0U patent/CN216742857U/en active Active
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