CN213064687U - Shaft seal cage type regulating valve - Google Patents
Shaft seal cage type regulating valve Download PDFInfo
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- CN213064687U CN213064687U CN202021760520.XU CN202021760520U CN213064687U CN 213064687 U CN213064687 U CN 213064687U CN 202021760520 U CN202021760520 U CN 202021760520U CN 213064687 U CN213064687 U CN 213064687U
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Abstract
The shaft seal cage type regulating valve comprises a valve body, a valve seat, a valve rod, a balance valve core, a first valve cage, a second valve cage and a valve cover, wherein a first shaft universal plug seal is arranged between the first valve cage and the valve seat, the first shaft universal plug seal is in sealing fit with the balance valve core, a second shaft universal plug seal is arranged between the first valve cage and the second valve cage, the second shaft universal plug seal is in sealing fit with the balance valve core, and the valve seat is in limit fit with the balance valve core; the sealing fit between the valve seat and the balance valve core is cancelled, the fit relation between the valve seat and the balance valve core is the limit fit when the valve is closed, the requirement on the manufacturing and processing precision of the valve seat is reduced, the processing cost is reduced, the maintenance is simpler and the cost is low; when the valve is closed, the balanced valve core is hardly affected by any unbalanced force, the unbalanced force of the balanced valve core is completely unrelated to medium pressure difference (especially the medium pressure difference is larger under the working conditions of large caliber and ultra-large caliber), and the actuator for driving the valve rod can open the valve only by overcoming the friction force between the corresponding universal plug seal and the balanced valve core, the friction force between the valve rod and the filler and the like.
Description
Technical Field
The utility model relates to a cage governing valve.
Background
At present, in industries such as petroleum, petrifaction, power plants, pharmacy, new energy, coal chemical industry, fine chemical industry and the like, a medium-diameter or large-diameter regulating valve with a nominal diameter of DN 250-DN 1200 needs VI-level or even zero leakage under a high-pressure working condition so as to meet the requirement of a continuous production process. The balanced cage type regulating valve can meet the sealing requirement only by providing enough sealing force for the valve seat, needs to be provided with an oversized actuator, and still can not meet the sealing requirement and the control requirement.
SUMMERY OF THE UTILITY MODEL
In view of the technical problem who exists among the background art, the utility model aims at providing a shaft seal cage type regulating valve.
In order to solve the technical problem, the utility model discloses a following technical scheme: shaft seal cage governing valve, including the valve body, the disk seat, the valve rod, balanced case, first valve cage, second valve cage and valve gap, the disk seat sets up in the valve body, the valve rod is connected with balanced case, first valve cage and second valve cage are located the valve body intracavity, first valve cage is established on the disk seat, the second valve cage sets up on first valve cage, the valve gap is connected with the valve body, the cooperation is established to valve gap and second valve cage pressure, be equipped with flow window on the first valve cage, balanced case disposes in the hole in the middle of first valve cage and second valve cage, its characterized in that: be equipped with the general stopper of primary shaft between first valve cage and the disk seat and seal up with general stopper, the primary shaft seals up with general stopper and balanced case seal cooperation, is equipped with the general stopper of secondary shaft between first valve cage and the second valve cage and seals up with general stopper, and the secondary shaft seals up with general stopper and balanced case seal cooperation, disk seat and the spacing cooperation of balanced case.
The inner hole wall of the first valve cage and/or the inner hole wall of the second valve cage are/is embedded with a guide sleeve, and the balance valve core is sleeved in the middle of the guide sleeve.
The lower end of the first valve cage and the upper end of the valve seat are respectively provided with a step structure and form a first containing groove, and the first shaft is sealed and positioned in the first containing groove by a universal plug.
The first shaft is sealed with general stopper and adopts flange limit axle with general stopper limit, and the flange limit that the first shaft was sealed with general stopper is by first valve cage and disk seat centre gripping setting.
The upper end of the first valve cage and the lower end of the second valve cage are respectively provided with a step structure and form a second accommodating groove, and the second shaft is sealed by a universal plug and is positioned in the second accommodating groove.
The utility model has the advantages that the shaft seal cage type regulating valve cancels the sealing matching of the valve seat and the balance valve core, the matching relationship of the valve seat and the balance valve core is the limit matching when closing, the requirement on the manufacturing and processing precision of the valve seat is reduced, the processing cost is reduced, the maintenance is simpler and the cost is low; when the valve is closed, the balanced valve core is hardly subjected to any unbalanced force, the unbalanced force of the balanced valve core is completely unrelated to medium pressure difference (particularly, the medium pressure difference is larger under the working conditions of large caliber and ultra-large caliber), and the actuator for driving the valve rod can open the valve only by overcoming the friction force between the corresponding universal plug seal and the balanced valve core, the friction force between the valve rod and the filler and the like, so that the requirement on the actuator is reduced; the first shaft and the second shaft are sealed and matched with the balance valve core to ensure that VI-level or zero leakage level can be reached when the valve is opened and closed.
The shaft seal cage type regulating valve can be widely applied to working conditions of high pressure, large caliber and tight shutoff, the leakage grade of the shaft seal cage type regulating valve reaches VI grade or zero leakage, the process requirement of tight regulation shutoff is realized, and the shaft seal cage type regulating valve is used for regulating and controlling process parameters.
Therefore, compared with the prior art, the utility model has substantive characteristics and progress.
Drawings
The following describes details and operational principles of embodiments and examples of the present invention with reference to the drawings.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged view of a in fig. 1.
Detailed Description
Referring to the attached drawings, the shaft seal cage type regulating valve in the embodiment comprises a valve body 1, a valve seat 2, a valve rod 3, a balance valve core 4, a first valve cage 5, a second valve cage 6 and a valve cover 7, wherein the valve seat 2 is arranged in the valve body 1, the valve rod 3 is connected with the balance valve core 4, the first valve cage 5 and the second valve cage 6 are positioned in an upper cavity of the valve body, the first valve cage 5 is arranged on the valve seat 2, the second valve cage 6 is arranged on the first valve cage 5, the valve cover 7 is connected with the valve body 1, the valve cover is in press fit with the second valve cage, a flow window 8 is arranged on the first valve cage 5, the balance valve core 4 is arranged in an inner hole between the first valve cage and the second valve cage, when the balance valve core 4 is driven by the valve rod 3 to axially lift, the balance valve core 4 runs in an inner hole in the middle of the second valve cage and the first valve cage, and the balance valve core is matched with a flow window on the first valve cage 5 to adjust the flow. The flow window on the first valve cage can set up the shape as required, and first valve cage also can set up to porous decompression, maze decompression and fall the structure of making an uproar in addition, effectual anti cavitation, elimination flash distillation, protection pipeline do not receive the damage. The valve cover 7 is provided with a stuffing box, the valve cover is provided with a stuffing gland 9 and a pressure plate 10, the gland is pressed on the stuffing box, a spring 11 (such as a disc spring for compensating the sealing of the stuffing and the valve rod) is arranged between the gland and the pressure plate, and the valve rod passes through the valve rod and the stuffing rod to extend outwards and can be connected with an actuator.
In order to avoid providing a sufficient sealing force for the valve seat, a strong actuator needs to be configured, and manufacturing and processing precision and cost of the valve seat are reduced, in the embodiment, a first shaft flooding plug seal 12 is arranged between the first valve cage 5 and the valve seat 2, the first shaft flooding plug seal 12 is in sealing fit with the balance valve core 4, a second shaft flooding plug seal 13 is arranged between the first valve cage 5 and the second valve cage 6, the second shaft flooding plug seal is in sealing fit with the balance valve core, and the valve seat is in limit fit with the balance valve core. When the balance valve core descends and closes, the valve seat is used for limiting, the balance valve core descends to the right position, the balance valve core and the first shaft are sealed by the universal plug seal to ensure closing, and the universal plug seal and the balance valve core are kept in a sealing fit relation above the first valve cage by the second shaft. When the balance valve core rises and is opened, the balance valve core is separated from the valve seat and the first shaft by the universal plug seal, and the balance valve core is still in sealing fit with the second shaft by the universal plug seal.
The shaft seal cage type regulating valve cancels the sealing fit of the valve seat and the balance valve core, the fit relationship of the valve seat and the balance valve core is the limit fit when the valve is closed, the requirement on the manufacturing and processing precision of the valve seat is reduced, the processing cost is reduced, the maintenance is simpler and the cost is low; the first shaft universal plug seal and the second shaft universal plug seal are adopted to carry out sealing fit (in an axial sealing mode), under the closing state of the valve, the first shaft universal plug seal and the second shaft universal plug seal on the upper side and the lower side of the balanced valve core are stressed in the same size and opposite directions and offset mutually, the balanced valve core is hardly stressed by any unbalanced force when the valve is closed, the unbalanced force of the balanced valve core is completely unrelated to medium pressure difference (particularly, the medium pressure difference is larger under the working conditions of large caliber and ultra-large caliber and high pressure), and the actuator for driving the valve rod can open the valve only by overcoming the friction force between the corresponding universal plug seal and the balanced valve core, the friction force between the valve rod and the filler and the like, so that; the first shaft and the second shaft are sealed and matched with the balance valve core to ensure that VI-level or zero leakage level can be reached when the valve is opened and closed.
In addition, further optimization is carried out, a guide sleeve 14 can be embedded in the inner hole wall of the first valve cage and/or the inner hole wall of the second valve cage, and a balance valve core is sleeved in the middle of the guide sleeve, so that the balance valve core is smoother and more stable in the opening and closing operation process of the valve (namely in the axial lifting process driven by the valve rod); in addition, when the valve is horizontally (the valve rod is in a horizontal state) packaged and transported or is kept stand for a long time, the guide sleeve enables the balance valve core to be centered, and the first universal plug seal and the second universal plug seal are prevented from being deformed due to bias of the weight of the balance valve core. Particularly, the guide sleeve (namely the guide belt) is arranged on the inner hole wall of the first valve cage, so that the effect is better, and the upper side and the lower side are more balanced.
Further optimize, for making processing convenient, convenient assembling, the lower extreme of first valve cage and the upper end of disk seat have the stair structure respectively and form first storage tank, and the primary shaft is located first storage tank with general stopper seal. Corresponding step structures are arranged at the lower end of the first valve cage and the upper end of the valve seat respectively, processing is convenient, and the technology is mature. The first containing groove is convenient to form, the first shaft can be installed by the universal plug seal, and the assembly is convenient. In addition, the first shaft can adopt the ordinary type with general stopper to seal, also can adopt flange limit axle with general stopper limit, and the flange limit 18 of first shaft with general stopper and 12 is by first valve cage and valve seat centre gripping setting when adopting flange limit axle to seal with general stopper, optimizes the structure, makes the first shaft with general stopper seal by first valve cage and valve seat centre gripping clip, and the structure is more stable, avoids the first shaft to seal with general stopper and takes place the position change, especially when the valve is opened. The stepped structures at the lower end of the first valve cage and the upper end of the valve seat are mutually sleeved and spliced, so that the structure is more stable after assembly.
In order to facilitate processing and assembly, the upper end of the first valve cage and the lower end of the second valve cage are respectively provided with a step structure to form a second accommodating groove, the upper end of the first valve cage and the lower end of the second valve cage are provided with corresponding step structures, the processing is convenient, the technology is mature, the second accommodating groove is formed, the second shaft is located in the second accommodating groove through the universal plug seal, and the assembly is convenient. The stepped structures at the upper end of the first valve cage and the lower end of the second valve cage are mutually sleeved and spliced, so that the structure is more stable after assembly.
Claims (5)
1. Shaft seal cage governing valve, including the valve body, the disk seat, the valve rod, balanced case, first valve cage, second valve cage and valve gap, the disk seat sets up in the valve body, the valve rod is connected with balanced case, first valve cage and second valve cage are located the valve body intracavity, first valve cage is established on the disk seat, the second valve cage sets up on first valve cage, the valve gap is connected with the valve body, the cooperation is established to valve gap and second valve cage pressure, be equipped with flow window on the first valve cage, balanced case disposes in the hole in the middle of first valve cage and second valve cage, its characterized in that: be equipped with the general stopper of primary shaft between first valve cage and the disk seat and seal up with general stopper, the primary shaft seals up with general stopper and balanced case seal cooperation, is equipped with the general stopper of secondary shaft between first valve cage and the second valve cage and seals up with general stopper, and the secondary shaft seals up with general stopper and balanced case seal cooperation, disk seat and the spacing cooperation of balanced case.
2. The shaft seal cage damper valve of claim 1 wherein: the inner hole wall of the first valve cage and/or the inner hole wall of the second valve cage are/is embedded with a guide sleeve, and the balance valve core is sleeved in the middle of the guide sleeve.
3. The shaft seal cage damper valve of claim 1 wherein: the lower end of the first valve cage and the upper end of the valve seat are respectively provided with a step structure and form a first containing groove, and the first shaft is sealed and positioned in the first containing groove by a universal plug.
4. The shaft seal cage damper valve of claim 3 wherein: the first shaft is sealed with general stopper and adopts flange limit axle with general stopper limit, and the flange limit that the first shaft was sealed with general stopper is by first valve cage and disk seat centre gripping setting.
5. The shaft seal cage damper valve of claim 1 wherein: the upper end of the first valve cage and the lower end of the second valve cage are respectively provided with a step structure and form a second accommodating groove, and the second shaft is sealed by a universal plug and is positioned in the second accommodating groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021760520.XU CN213064687U (en) | 2020-08-21 | 2020-08-21 | Shaft seal cage type regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021760520.XU CN213064687U (en) | 2020-08-21 | 2020-08-21 | Shaft seal cage type regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213064687U true CN213064687U (en) | 2021-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021760520.XU Active CN213064687U (en) | 2020-08-21 | 2020-08-21 | Shaft seal cage type regulating valve |
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| CN (1) | CN213064687U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115451144A (en) * | 2021-06-08 | 2022-12-09 | 中核核电运行管理有限公司 | Cage type regulating valve based on unchanged valve body structure |
-
2020
- 2020-08-21 CN CN202021760520.XU patent/CN213064687U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115451144A (en) * | 2021-06-08 | 2022-12-09 | 中核核电运行管理有限公司 | Cage type regulating valve based on unchanged valve body structure |
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