CN113565973B - Angle valve and design method thereof - Google Patents
Angle valve and design method thereof Download PDFInfo
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- CN113565973B CN113565973B CN202110672057.6A CN202110672057A CN113565973B CN 113565973 B CN113565973 B CN 113565973B CN 202110672057 A CN202110672057 A CN 202110672057A CN 113565973 B CN113565973 B CN 113565973B
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- 238000013461 design Methods 0.000 title claims abstract description 27
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- 238000003466 welding Methods 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 22
- 238000003825 pressing Methods 0.000 claims description 9
- 239000007787 solid Substances 0.000 abstract description 13
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- 238000012360 testing method Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
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- 238000012545 processing Methods 0.000 description 3
- 102220124171 rs146038948 Human genes 0.000 description 3
- 206010017472 Fumbling Diseases 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
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- 239000002002 slurry Substances 0.000 description 2
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- 239000003245 coal Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
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- Lift Valve (AREA)
Abstract
The invention provides an angle valve and a design method thereof, wherein the angle valve comprises a valve seat, a valve rod assembly, a valve body, a valve rod guide assembly and a valve rod guide sleeve assembly, the valve rod guide assembly comprises 1-6 sections of valve rod guide or 1-6 sections of valve rod guide and valve head guide, the valve rod guide is arranged outside the valve rod, the valve head guide is arranged outside the valve head, the valve rod guide sleeve assembly is fixed in the valve body through a valve cover flange and comprises 1-5 sections of valve rod guide sleeve or 1-5 sections of valve rod guide sleeve and 1-5 sections of valve head guide sleeve, the valve rod guide sleeve and the valve head guide sleeve are respectively arranged outside the valve rod guide and the valve head guide, at least one section of valve rod guide and the valve head guide sleeve are connected into a whole, and the arrangement mode and the structural parameters of a guide structure are designed based on the valve rod structure and the motion parameters. The angle valve and the design method thereof realize stable actions with high efficiency and high accuracy under the working conditions of high solid content and high pressure difference.
Description
Technical Field
The invention belongs to the technical field of valve design, and particularly relates to an angle valve for medium-containing solid, easy-vibration and easy-jamming working conditions and a design method thereof.
Background
In industries such as petrochemical industry, coal chemical industry, metallurgy, sewage treatment and the like, a plurality of key process section control valves are in the working condition of high solid content, even gas-liquid-solid three-phase flow, particularly under the condition of high pressure difference, the valves are easy to generate vibration and jamming and the like, so the valves with valve rod guiding structures are required to be designed. However, some guide structures have too large length-diameter ratio and are difficult to process and assemble, so that a multi-section valve rod guide structure needs to be designed.
The existing multi-section valve rod guide structure lacks design standards in arrangement mode and structural parameters, even if the multi-section valve rod guide structure is arranged, the arrangement mode and structural parameters of each section of valve rod guide structure are unreasonable in design, and the conditions of vibration, blocking and the like exist in the same way, so that repeated fumbling design and repeated trial and error of the valve rod guide structure have to be carried out for many times, the improvement effect of the valve is lack of predictability, and the improvement efficiency is low.
Disclosure of Invention
The invention aims to solve the technical problems of providing an angle valve and a design method thereof, wherein the arrangement mode and the structural parameters of a guide structure are designed based on a valve rod structure and motion parameters, so that the valve can be stably operated and prevented from vibrating or jamming with high efficiency and high accuracy under the working conditions of high solid content and high pressure difference.
The technical scheme provided by the invention is as follows:
The angle valve comprises a valve seat, a valve rod assembly, a valve body, a valve rod guide assembly and a valve rod guide sleeve assembly, wherein the valve seat is arranged at the lower part of the valve body, the outer wall of the valve rod assembly is matched with the inner wall of an outlet section of the valve body and is used for guiding media out of the valve body, the valve rod assembly comprises a valve rod and a valve head which are connected into a whole, the valve head extends into the valve body inwards, the flow rate of media out of the valve body is controlled through reciprocating linear motion in the valve body, the valve rod guide assembly comprises 1-6 sections of valve rod guide or 1-6 sections of valve rod guide and valve head guide, the valve rod guide is arranged outside the valve rod, the valve head guide is arranged outside the valve head and is used for guiding the valve rod assembly when the valve rod assembly reciprocates, the valve rod guide sleeve assembly is fixed in the valve body through a valve cover flange, the valve rod guide sleeve is provided with 1-5 sections of valve rod guide sleeve or the valve rod guide sleeve and the valve head guide sleeve, the valve rod guide sleeve and the valve head guide sleeve are respectively sleeved outside the valve rod guide, at least one section of guide is connected with the valve rod guide sleeve into a whole, and the valve head guide sleeve is arranged outside at least one section of the guide and at least one section of guide sleeve is connected into a whole;
the maximum diameter of the valve rod is D1, the maximum diameter of the valve head is D2, the outer diameter D1= (1.1-3) D1 of the valve rod guide, the outer diameter D2= (1.1-3) D2 of the valve head guide, the outer diameter D3= (1.1-3) D1 of the valve rod guide sleeve, the outer diameter D4= (1.1-3) D2 of the valve head guide sleeve, the length H1 = 0.2D 1-20D 1 of the single-section valve rod guide or the valve head guide in the valve rod guide assembly, and the length H2 = 0.1D 1-40D 1 of the single-section valve rod guide sleeve or the valve head guide sleeve in the valve rod guide sleeve assembly.
The relation between the valve rod assembly travel and the segments comprises that when the valve rod assembly travel M is less than or equal to 1 x d1, the valve rod guide number is 1-2 segments, the valve head guide number is 0-1 segments, when the valve rod assembly travel is less than or equal to 1 x d1< M is less than or equal to 2 x d1, the valve rod guide number is 2-3 segments, the valve head guide number is 1-2 segments, and when the valve rod assembly travel M is more than or equal to 2 x d1, the valve head guide number is 3 segments or more, and the valve head guide number is 1-3 segments.
The relation between the length of the valve rod guide sleeve assembly and the segments comprises that when the total length H of the valve rod guide sleeve assembly is less than or equal to 3 x d1, the number of the valve rod guide sleeves is 1 segment, the number of the valve head guide sleeves is 0 segment, when the total length H of the valve rod guide sleeve assembly is 3 x d1< H is less than or equal to 10 x d1, the number of the valve rod guide sleeves is 1-2 segments, the number of the valve head guide sleeves is 0-1 segment, and when the total length H of the valve rod guide sleeve assembly is more than 10 x d1, the number of the valve rod guide sleeves is 2-4 segments, and the number of the valve head guide sleeves is 0-1 segment.
In a second aspect, a design method of an angle valve, the angle valve includes a valve seat, a valve rod assembly, a valve body, a valve rod guiding assembly and a valve rod guiding sleeve assembly, the valve seat is arranged at the lower part of the valve body, the outer wall is matched with the inner wall of an outlet section of the valve body and is used for guiding medium out of the valve body, the valve rod assembly includes a valve rod and a valve head which are connected into a whole, the valve head extends inwards into the valve body, and the flow rate of medium at the outlet of the valve body is controlled by reciprocating linear motion in the valve body, the design method includes:
the valve rod guide assembly is designed to have 1-6 sections of valve rod guide or 1-6 sections of valve rod guide and valve head guide, wherein the valve rod guide is arranged outside the valve rod, the valve head guide is arranged outside the valve head and is used for guiding the valve rod guide sleeve assembly when the valve rod assembly reciprocates;
The maximum diameter of the valve rod is D1, the maximum diameter of the valve head is D2, the external diameter D1= (1.1-3) D1 of the valve rod guide is determined, the external diameter D2= (1.1-3) D2 of the valve head guide is determined, the external diameter D3= (1.1-3) D1 of the valve rod guide sleeve is determined, the external diameter D4= (1.1-3) D2 of the valve head guide sleeve is determined, the length H1=0.2D 1-20D 1 of the single-section valve rod guide or the valve head guide in the valve rod guide assembly is determined, and the length H2= 0.1D 1-40D 1 of the single-section valve rod guide sleeve or the valve head guide sleeve in the valve rod guide sleeve assembly is determined.
Determining the relation between the valve rod assembly travel and the segments, wherein when the valve rod assembly travel M is less than or equal to 1 x d1, the valve rod guide number is 1-2 segments, and the valve head guide number is 0-1 segments, when the valve rod assembly travel is less than or equal to 1 x d1< M is less than or equal to 2 x d1, the valve rod guide number is 2-3 segments, and the valve head guide number is 1-2 segments, and when the valve rod assembly travel M is more than or equal to 2 x d1, the valve head guide number is 3 segments or more, and the valve head guide number is 1-3 segments;
The relation between the length of the valve rod guide sleeve assembly and the segments is determined, wherein when the total length H of the valve rod guide sleeve assembly is less than or equal to 3 x d1, the number of the valve rod guide sleeves is 1 segment, the number of the valve head guide sleeves is 0 segment, when the total length H of the valve rod guide sleeve assembly is 3 x d1< H is less than or equal to 10 x d1, the number of the valve rod guide sleeves is 1-2 segments, the number of the valve head guide sleeves is 0-1 segment, and when the total length H of the valve rod guide sleeve assembly is more than 10 x d1, the number of the valve rod guide sleeves is 2-4 segments, and the number of the valve head guide sleeves is 0-1 segment.
According to the angle valve and the design method thereof, the angle valve has the following beneficial effects:
according to the angle valve and the design method thereof, the arrangement mode and the structural parameters of the guide structure are designed based on the valve rod structure and the motion parameters, and under the working conditions of high solid content and high pressure difference, the stable action of the valve and the prevention of vibration or jamming are realized with high efficiency and high accuracy.
Drawings
FIG. 1 is a schematic illustration of a valve having a multi-segment valve stem pilot configuration with a two-segment valve stem pilot assembly and a two-segment valve stem pilot sleeve assembly;
FIG. 2 is a schematic illustration of a valve having a multi-segment valve stem pilot configuration with a three-segment valve stem pilot assembly and a two-segment valve stem pilot sleeve assembly;
FIG. 3 is a schematic illustration of a valve having a multi-segment valve stem pilot configuration with a three-segment valve stem pilot assembly and a three-segment valve stem pilot sleeve assembly;
FIG. 4 is a schematic illustration of a guide sleeve I and a guide sleeve II connected by welding;
FIG. 5 is a schematic illustration of a guide sleeve I and a guide sleeve II connected by threads;
FIG. 6 is a schematic view of a guide sleeve I and a guide sleeve II connected by a spline, wherein the left view is a longitudinal section view, and the right view is a transverse section view of A-A;
FIG. 7 is a schematic illustration of a guide sleeve I and a guide sleeve II connected by end compression;
FIG. 8 is a schematic view of a guide sleeve I and a guide sleeve III connected by threads;
FIG. 9 is a schematic illustration of the connection of guide sleeve I and guide sleeve III by end compression;
FIG. 10 is a schematic view of a spline connection of a guide sleeve I and a guide sleeve III, wherein the left view is a longitudinal sectional view, and the right view is a transverse sectional view B-B;
FIG. 11 is a schematic diagram of the connection of the guide sleeve I and the guide sleeve II with the guide connection block at the same time;
Fig. 12 is a schematic diagram of a connection between a valve stem guide and a valve stem guide sleeve, wherein the left diagram is a welded connection, the middle diagram is a combination of a threaded connection and a welded connection, and the right diagram is a combination of a gap or transition or interference fit and an end compression connection.
Description of the reference numerals
1-Valve seat, 2-valve rod assembly, 3-valve body, 4-valve rod guide I, 5-valve rod guide II, 6-valve rod guide sleeve I, 7-valve rod guide sleeve II, 8-valve head guide I, 9-valve head guide sleeve I, 10-guide connecting block, 11-annular compressible material and 12-metal hard support ring.
Detailed Description
The features and advantages of the present invention will become more apparent and clear from the following detailed description of the invention.
The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
According to a first aspect of the invention, as shown in fig. 1-3, there is provided an angle valve, which comprises a valve seat 1, a valve rod assembly 2, a valve body 3, a valve rod guiding assembly and a valve rod guiding sleeve assembly, wherein the valve seat 1 is arranged at the lower part of the valve body 3, and the outer wall is matched with the inner wall of an outlet section of the valve body 3 and is used for guiding a medium out of the valve body 3; the valve rod assembly 2 comprises a valve rod and a valve head which are connected into a whole, the valve rod and the valve head extend inwards into the valve body 3 through the valve head, the valve rod outlet medium flow is controlled through the reciprocating linear motion of the valve rod assembly 2 in the valve body 3, the valve rod guide assembly is provided with 1-6 sections of valve rod guides or 1-6 sections of valve rod guides and valve head guides, the valve rod guides are arranged outside the valve rod, the valve head guides are arranged outside the valve head and are used for guiding the valve rod assembly 2 when in reciprocating motion, the valve rod guide sleeve assembly is fixed in the valve body 3 through a valve cover flange and is provided with 1-5 sections of valve rod guide sleeves or 1-5 sections of valve rod guide sleeves and 1-5 sections of valve head guide sleeves, the valve rod guide sleeves and the valve rod guide sleeves are respectively sleeved outside the valve rod guides and the valve rod guide sleeves, and at least one section of valve head guides and the valve head guide sleeves are connected into a whole when the valve head guide and the valve head guide sleeves exist, so that the relative positions of the valve rod guide assembly on the valve body 3 are maintained;
The maximum diameter of the valve rod is D1, the maximum diameter of the valve head is D2, the outer diameter D1= (1.1-3) D1 of the valve rod guide, the outer diameter D2= (1.1-3) D2 of the valve head guide, the outer diameter D3= (1.1-3) D1 of the valve rod guide sleeve, the outer diameter D4= (1.1-3) D2 of the valve head guide sleeve, the length H1 = 0.2D 1-20D 1 of the single-section valve rod guide or the valve head guide in the valve rod guide assembly, and the length H2 = 0.1D 1-40D 1 of the single-section valve rod guide sleeve or the valve head guide sleeve in the valve rod guide sleeve assembly;
The relation between the valve rod assembly travel and the segmentation comprises that when the travel M of the valve rod assembly 2 is less than or equal to 1 x d1, the number of valve rod guides is 1-2 segments, the number of valve head guides is 0-1 segments, when the travel of the valve rod assembly 2 is 1 x d1< M is less than or equal to 2 x d1, the number of valve rod guides is 2-3 segments, the number of valve head guides is 1-2 segments, when the travel M of the valve rod assembly 2 is more than or equal to 2 x d1, the number of valve rod guides is 3 segments or more, and the number of valve head guides is 1-3 segments, as shown in table 1;
TABLE 1 valve stem assembly travel versus segment
| Travel of valve stem assembly | Number of valve stem guides | Number of valve head guides |
| M≤1*d1 | 1-2 Sections | 0-1 Segment |
| 1*d1<M≤2*d1 | 2-3 Sections | 1-2 Sections |
| M>2*d1 | 3 Sections or more | 1 To 3 sections |
The relation between the length of the valve rod guide sleeve assembly and the segments comprises that when the total length H of the valve rod guide sleeve assembly is less than or equal to 3 x d1, the number of the valve rod guide sleeves is 1 segment, the number of the valve head guide sleeves is 0 segment, when the total length H of the valve rod guide sleeve assembly is 3 x d1< H is less than or equal to 10 x d1, the number of the valve rod guide sleeves is 1-2 segments, the number of the valve head guide sleeves is 0-1 segment, and when the total length H of the valve rod guide sleeve assembly is more than 10 x d1, the number of the valve rod guide sleeves is 2-4 segments, and the number of the valve head guide sleeves is 0-1 segment, which is shown in table 2.
Table 2 relationship of valve stem guide sleeve assembly length to segment
| Total length of guide sleeve assembly | Number of valve rod guide sleeves | Number of valve head guide sleeves |
| H≤3*d1 | 1 Section | Segment 0 |
| 3*d1<H≤10*d1 | 1-2 Sections | 0-1 Segment |
| H>10*d1 | 2-4 Sections | 0-1 Segment |
The inventor finds that the multi-section valve rod guiding structure can reduce the vibration and jamming of the valve. However, the arrangement mode and the structural parameters of the multi-section valve rod guide structure lack design standards, namely the multi-section valve rod guide structure is adopted, under the condition of high-pressure high-solid-content fluid, the conditions of vibration, jamming and the like exist due to unreasonable arrangement mode and structural parameter design of each section of valve rod guide structure, and the valve rod guide structure needs to be repeatedly searched for multiple times and is repeatedly tried and misplaced, so that the improvement effect of the valve is lack of predictability, and the improvement efficiency is low. The present inventors have conducted extensive studies and repeated experiments to determine the results of tables 1 and 2 described above. For the valve rods with different strokes M, the problems of vibration, deformation, incapability of ensuring coaxiality and the like exist without setting the guide, the valve rods are positioned excessively due to the fact that the number of the guide is too large, and when the number of the guide is increased, the difficulty of processing and manufacturing products can be greatly improved in order to ensure geometric form and position tolerance among different guides. Thus, the distribution results in the table were obtained by trial and error.
For Table 2, the ratio of the total length H of the valve stem guide sleeve assembly to the maximum outer diameter d1 of the valve stem spans more, as affected by factors such as valve body size, valve travel, etc. The ratio of H to d1 determines the processing difficulty of the guide sleeve, such as cylindricity and other form and position tolerance control, and influences the positioning and assembling difficulty between the valve rod and the valve rod guide assembly, and further influences the usability of the valve rod. The results of the distribution in the table were obtained by repeated fumbling.
By combining the travel of the valve stem assembly and the overall length of the guide sleeve assembly, the number of valve stem guides, valve head guides, valve stem guide sleeves, and valve head guide sleeves can be determined from tables 1 and 2.
In a preferred embodiment, the length h1=0.2dd1 to 20dd1, preferably h1=1 dd1 to 10dd1 of the single-stage valve stem guide or valve head guide in the valve stem guide assembly. In the above range, particularly 1×d1 to 10×d1, the valve rod assembly 2 reciprocates for more than 500 times in a straight line, and no jamming occurs.
In a preferred embodiment, the length h2=0.1×d1 to 40×d1, preferably h2=1×d1 to 10×d1, of the single-stage valve stem guide sleeve or valve head guide sleeve in the valve stem guide sleeve assembly. In particular, the range is1×d1 to 10×d1. The length of a single section in the valve rod guide assembly and the valve rod guide sleeve assembly is too short to be lower than the range, and the guide effect cannot be achieved, if the length exceeds the range, the over-positioning between the valve rod and the valve rod guide and the over-positioning between the valve rod guide and the valve rod guide sleeve can be caused, particularly in the working condition containing solid particles, gaps between the valve rod and the valve rod guide valve and between the valve rod guide and the valve rod guide sleeve only need to be filled with a small amount of solid particles, so that the valve rod is scratched, even the service life of the valve rod is seriously influenced under the condition that the valve rod cannot act.
In a preferred embodiment, when the valve rod guiding assembly only has a single valve rod guiding mode, such as the valve rod guiding mode II 5 positioned at the upper part of the valve rod, the single valve rod guiding mode, the annular compressible material and the metal hard supporting ring are installed in a gap formed by the valve rod guiding sleeve and the valve rod, the annular compressible material is tightly covered on the valve rod, the metal hard supporting ring is in clearance fit with the valve rod, and the annular compressible material and the metal hard supporting ring are filled in the gap formed by the valve rod guiding sleeve and the valve rod, so that the valve rod guiding mode can be supported, and leakage of fluid media from the valve rod is prevented.
As shown in fig. 1, when the valve rod guiding assembly comprises two or more valve rod guides, such as a valve rod guide I4 positioned in the middle of the valve rod and a valve rod guide II 5 positioned at the upper part of the valve rod, the two or more valve rod guides, at least one section of annular compressible material 11 and a metal hard supporting ring 12 for supporting and separating adjacent valve rod guides are installed in a gap formed between the valve rod guiding sleeve assembly and the valve rod, the annular compressible material is tightly coated on the valve rod, and the metal hard supporting ring is in clearance fit with the valve rod.
In a preferred embodiment, as shown in fig. 2, when the valve rod guide assembly is provided with a single valve head guide such as the valve head guide I8 positioned at the upper part of the valve head, the single valve head guide and a metal hard support ring are installed in a gap formed by the valve head guide sleeve and the valve head, the metal hard support ring is in clearance fit with the valve head, and the support of the valve head guide in the gap is implemented through the filling of the metal hard support ring in the gap formed by the valve head guide sleeve and the valve head.
When the valve rod guide assembly comprises two or more valve head guides, a metal hard support ring for guiding, supporting and separating the adjacent valve head guides is arranged in a gap formed by the valve head guide sleeve assembly and the valve head, and the metal hard support ring is in clearance fit with the valve head.
In a preferred embodiment, the valve stem guide sleeve assembly comprises two or more valve stem guide sleeves, such as the valve stem guide sleeve I6 and the valve stem guide sleeve II 7 positioned at the valve stem part, and the adjacent valve stem guide sleeves are connected in a mechanical manner such as by processing a threaded section at the butt joint part (fig. 5), welding the connection (fig. 4), interference fit and the like, or in a connecting piece manner such as a bolt/screw/mortise/spline (fig. 6)/end pressing (fig. 7), or in a manner of simultaneously connecting the guide connecting block 10 at the butt joint part (fig. 11).
When the valve rod guide sleeve assembly comprises at least one valve rod guide sleeve and a valve head guide sleeve, such as the valve rod guide sleeve I6 positioned at the valve rod part and the valve head guide sleeve I9 positioned at the valve head part, the adjacent valve rod guide sleeves and the valve head guide sleeves are connected in mechanical forms such as threaded section connection (figure 8), welding connection, interference fit and the like at the butt joint part, or are connected in the form of connecting pieces such as bolts/screws/mortise and tenon joints/spline (figure 10)/end part compression (figure 9), or are connected in the mode of simultaneously connecting guide connecting blocks at the butt joint part.
When the thread segments are processed at the butt joint part for connection, the screwing depth is not less than 0.5 x d1;
when a welded connection is used, intermittent welding is not allowed;
When the valve rod guide sleeve is connected in a mechanical mode such as interference fit, the hoop surface stress is not more than 10MPa, if the hoop surface stress exceeds the threshold value, under the use conditions such as high temperature, the thermal stress is concentrated at the connecting part of the valve rod guide sleeve and the valve head guide sleeve, so that the phenomenon of serious deformation is caused, and the use performance is influenced;
when the connecting pieces such as bolts/screws/mortise and tenon joints/spline/end parts are used for connection, the axial pressing force is not lower than 5MPa, and the phenomenon that the structure is loose due to insufficient pressing force under the working conditions such as high temperature and vibration is prevented, the gap is increased, a solid-containing medium is introduced, and the connecting part is broken;
when the connection is performed in a mode that the guide connection blocks are simultaneously connected at the butt joint part, the inner diameter of the guide connection blocks is not smaller than 2 x d1, and the height is 0.2 x d 1-5 x d1.
In a preferred embodiment, the valve rod guide and the valve rod guide sleeve or the valve head guide and the valve head guide sleeve are connected in a mechanical mode such as threaded section connection, welding connection, interference fit and the like at the butt joint position, or are connected in a connecting piece mode such as bolt/screw/mortise-tenon joint/spline/end pressing, or are connected into a whole in a mode of simultaneously connecting the guide connecting blocks at the butt joint position and a combination of the modes. Fig. 12 shows a welded connection mode, fig. 12 shows a combination of a threaded connection and a welded connection mode, and fig. 12 shows a combination of a gap or transition or interference fit and an end compression connection mode.
When the thread segments are processed at the butt joint part for connection, the screwing depth is not less than 0.5 x d1;
when a welded connection is used, intermittent welding is not allowed;
when the connection is in a mechanical form such as interference fit, the stress of the circumferential surface is not more than 10MPa;
When the connecting pieces such as bolts/screws/mortise and tenon joints/spline/end part compression are used for connection, the axial compression force is not lower than 5MPa;
when the connection is performed in a mode that the guide connection blocks are simultaneously connected at the butt joint part, the inner diameter of the guide connection blocks is not smaller than 2 x d1, and the height is 0.2 x d 1-5 x d1.
Preferably, as shown in FIG. 3, the valve of the present invention comprises a valve seat, a valve stem assembly, a valve body, a three-stage valve stem guide assembly and a three-stage valve stem guide sleeve assembly; the valve rod guide assembly comprises a valve rod guide I, a valve rod guide II and a valve head guide I, and the valve rod guide sleeve assembly comprises a valve rod guide sleeve I, a valve rod guide sleeve II and a valve head guide sleeve I; when the maximum diameter of the valve rod is D1, the maximum diameter of the valve rod is D2, the stroke M of the valve rod assembly 2 is greater than 2x D1, the outer diameter D1=1.75 x D1 of the valve rod guide I-II, the outer diameter D2=1.5 x D2 of the valve head guide I, the outer diameter D3=2 x D1 of the valve rod guide I, the outer diameter D4=1.2 x D2 of the valve head guide I, the length H11=3 x D1 of the valve rod guide II, the length H12=2 x D1 of the valve head guide II, the length H13 of the valve head guide I=3 x D1, the length H21 of the valve rod guide I=6 x D1 of the valve rod guide II, the length H22=3 x D1 of the valve head guide I, the length H23 of the valve head guide I=10 x D1 of the valve rod guide I, the valve rod guide I and the valve rod guide II are connected through threads and welding, the screw threads and the screw depths are 1.2 x D1, the valve head guide II and the valve head guide I is connected through splines to form an even distribution 8 teeth, the valve head guide II is in interference fit with the valve head guide I through splines, the valve rod guide I is connected with the valve head guide II through a small guide ring through the spline and is in an interference fit with the small guide I through the small guide sleeve I, and the small guide sleeve is in a welding mode of the small guide sleeve is connected with the valve head II through the small guide sleeve and is connected with the small guide sleeve I through the guide sleeve is welded with the small guide sleeve stress.
In a preferred embodiment, the hardness of the material of the valve rod guiding assembly is smaller than that of the valve rod assembly, so that damage to the surface of the valve rod assembly is prevented, a large gap exists between the valve rod assembly and the valve rod guiding assembly, and jamming and the like are caused after solid-containing media enter.
According to a second aspect of the present invention, there is provided a design method of an angle valve, the angle valve comprising a valve seat 1, a valve stem assembly 2, a valve body 3, a valve stem guide assembly and a valve stem guide sleeve assembly, the valve seat 1 being provided at a lower portion of the valve body 3, an outer wall being fitted with an inner wall of an outlet section of the valve body 3 for guiding a medium out of the valve body 3, the valve stem assembly 2 comprising a valve stem and a valve head integrally connected to each other, which extend inwardly into the valve body 3 with the valve head, and controlling a flow rate of the medium at an outlet of the valve body by a reciprocating linear movement of the valve stem assembly 2 within the valve body 3, the design method comprising:
The valve rod guide assembly is designed to have 1-6 sections of valve rod guide or 1-6 sections of valve rod guide and valve head guide, wherein the valve rod guide is arranged outside the valve rod, and the valve head guide is arranged outside the valve head and is used for guiding the valve rod assembly 2 when the valve rod assembly reciprocates; the valve rod guide sleeve assembly is fixed on the valve body 3 through a valve cover flange, the valve rod guide sleeve assembly is designed to be provided with 1-5 sections of valve rod guide sleeves or 1-5 sections of valve rod guide sleeves and valve head guide sleeves, wherein the valve rod guide sleeves and the valve head guide sleeves are respectively sleeved outside the valve rod guide and the valve head guide sleeves, at least one section of valve rod guide is connected with the valve rod guide sleeves into a whole, and at least one section of valve head guide is connected with the valve head guide sleeves into a whole when the valve head guide and the valve head guide sleeves exist, so that the relative position of the valve rod guide assembly on the valve body 3 is maintained;
The maximum diameter of the valve rod is D1, the maximum diameter of the valve head is D2, the external diameter D1= (1.1-3) D1 of the valve rod guide is determined, the external diameter D2= (1.1-3) D2 of the valve head guide is determined, the external diameter D3= (1.1-3) D1 of the valve rod guide sleeve is determined, the external diameter D4= (1.1-3) D2 of the valve head guide sleeve is determined, the length H21=0.2d1-20D 1 of the single-section valve rod guide or the valve head guide in the valve rod guide assembly is determined, and the length H22=0.1d1-40D 1 of the single-section valve rod guide sleeve or the valve head guide sleeve in the valve rod guide sleeve assembly;
Determining the relation between the valve rod assembly travel and the segments, wherein when the travel M of the valve rod assembly 2 is less than or equal to 1x d1, the number of valve rod guides is 1-2 segments, and the number of valve head guides is 0-1 segments, when the travel of the valve rod assembly 2 is 1x d1< M is less than or equal to 2x d1, the number of valve rod guides is 2-3 segments, the number of valve head guides is 1-2 segments, and when the travel M of the valve rod assembly 2 is more than or equal to 2x d1, the number of valve rod guides is 3 segments or more, and the number of valve head guides is 1-3 segments;
The relation between the length of the valve rod guide sleeve assembly and the segments is determined, wherein when the total length H of the valve rod guide sleeve assembly is less than or equal to 3 x d1, the number of the valve rod guide sleeves is 1 segment, the number of the valve head guide sleeves is 0 segment, when the total length H of the valve rod guide sleeve assembly is 3 x d1< H is less than or equal to 10 x d1, the number of the valve rod guide sleeves is 1-2 segments, the number of the valve head guide sleeves is 0-1 segment, and when the total length H of the valve rod guide sleeve assembly is more than 10 x d1, the number of the valve rod guide sleeves is 2-4 segments, and the number of the valve head guide sleeves is 0-1 segment.
In the design method of the present invention, the length of the single-stage valve rod guide or the valve head guide in the valve rod guide assembly is preferably h1=1×d1 to 10×d1.
In the design method of the present invention, the length of the single-section valve stem guide sleeve or the valve head guide sleeve in the valve stem guide sleeve assembly is preferably h2=1×d1 to 10×d1.
In the design method of the invention, when the valve rod guide assembly only has a single valve rod guide such as the valve rod guide II 5 positioned at the upper part of the valve rod, the single valve rod guide, the annular compressible material and the metal hard support ring are arranged in a gap formed by the valve rod guide sleeve and the valve rod, the annular compressible material is tightly coated on the valve rod, the metal hard support ring is in clearance fit with the valve rod, and the annular compressible material and the metal hard support ring are filled in the gap formed by the valve rod guide sleeve and the valve rod, so that the valve rod guide can be supported, and the leakage of a fluid medium from the valve rod can be prevented.
As shown in fig. 1, when the valve rod guiding assembly comprises two or more valve rod guides such as a valve rod guide I4 positioned in the middle of the valve rod and a valve rod guide II 5 positioned at the upper part of the valve rod, the two or more valve rod guides, at least one section of annular compressible material 11 and a metal hard support ring 12 for supporting and separating adjacent valve rod guides are installed in a gap formed between the valve rod guiding sleeve assembly and the valve rod, the annular compressible material is tightly coated on the valve rod, and the metal hard support ring is in clearance fit with the valve rod.
In the design method of the invention, as shown in fig. 2, when the valve rod guide assembly is provided with a single valve head guide such as the valve head guide I8 positioned at the upper part of the valve head, the single valve head guide and a metal hard support ring are arranged in a gap formed by the valve head guide sleeve and the valve head, the metal hard support ring is in clearance fit with the valve head, and the valve head guide is supported in the gap through filling of the metal hard support ring in the gap formed by the valve head guide sleeve and the valve head.
When the valve rod guide assembly comprises two or more valve head guides, the metal hard support rings for supporting and separating the adjacent valve head guides are arranged in the gap formed by the valve head guide sleeve assembly and the valve head, and the metal hard support rings are in clearance fit with the valve heads.
In the design method of the invention, when the valve rod guide sleeve assembly comprises two or more valve rod guide sleeves, such as the valve rod guide sleeve I6 and the valve rod guide sleeve II 7 which are positioned at the valve rod part, the adjacent valve rod guide sleeves are connected in mechanical forms such as threaded section connection, welding connection, interference fit and the like at the butt joint part, or are connected in the form of connecting pieces such as bolts/screws/mortise-tenon joints/spline joints/end parts compression, or are connected in the mode of simultaneously connecting guide connecting blocks at the butt joint part.
When the valve rod guide sleeve assembly comprises at least one valve rod guide sleeve and a valve head guide sleeve, such as the valve rod guide sleeve I6 positioned at the valve rod part and the valve head guide sleeve I9 positioned at the valve head part, the adjacent valve rod guide sleeves and the valve head guide sleeve are connected in mechanical forms such as threaded section connection, welding connection, interference fit and the like at the butt joint part, or are connected in the form of connecting pieces such as bolts/screws/mortise and tenon joints/spline/end part compression, or are connected in the mode of simultaneously connecting guide connecting blocks at the butt joint part.
When the thread segments are processed at the butt joint part for connection, determining that the screwing depth is not less than 0.5 x d1;
When welding connection is adopted, determining that intermittent welding is not adopted;
When the connection is in a mechanical form such as interference fit, the hoop surface stress is not more than 10MPa, if the hoop surface stress exceeds the threshold value, under the use conditions such as high temperature, the thermal stress concentration exists at the connection part of the valve rod guide sleeve/valve head guide sleeve, so that the serious deformation phenomenon is caused, and the use performance is influenced;
when the bolts/screws/mortise and tenon joints/spline/end parts are connected in a connecting piece mode such as pressing, the axial pressing force is not lower than 5MPa, and the phenomenon that the structure is loose due to insufficient pressing force under the working conditions such as high temperature and vibration is prevented, a solid-containing medium is introduced due to increased clearance, and the connecting part is broken is avoided;
when the connection is performed in a mode that the guide connection blocks are simultaneously connected at the butt joint part, the inner diameter of the guide connection blocks is not smaller than 2 x d1, and the height is 0.2 x d 1-5 x d1.
In the design method of the invention, the valve rod guide and the valve rod guide sleeve or the valve head guide and the valve head guide sleeve are connected in mechanical forms such as threaded section connection, welding connection, interference fit and the like through butt joint parts, or are connected in the form of connecting pieces such as bolts/screws/mortise and tenon joints/spline/end parts compaction or are connected into a whole through a mode of simultaneously connecting guide connecting blocks at the butt joint parts and a combination of the modes.
When the thread segments are processed at the butt joint part for connection, determining that the screwing depth is not less than 0.5 x d1;
When welding connection is adopted, determining that intermittent welding is not adopted;
when the connection is in a mechanical form such as interference fit, the stress of the circumferential surface is not more than 10MPa;
When the connecting pieces such as bolts/screws/mortise/spline/end part compression are used for connection, the axial compression force is not lower than 5MPa;
when the connection is performed in a mode that the guide connection blocks are simultaneously connected at the butt joint part, the inner diameter of the guide connection blocks is not smaller than 2 x d1, and the height is 0.2 x d 1-5 x d1.
In the design method of the invention, the hardness of the valve rod guiding assembly is smaller than that of the valve rod assembly.
Examples
Example 1
The valve comprises a valve seat, a valve rod assembly, a valve body, a three-section valve rod guide assembly and a two-section valve rod guide sleeve assembly, wherein the valve rod guide assembly comprises a valve rod guide I4, a valve rod guide II 5 and a valve head guide I8, the valve rod guide sleeve assembly comprises a valve rod guide sleeve I6 and a valve head guide sleeve I9, when the maximum diameter of the valve rod is D1 (40 mm), the maximum diameter of the valve head is D2 (80 mm) and the travel M of the valve rod assembly 2 is greater than 2x D1 (90 mm), the outer diameter D1=1.75 x D1 (70 mm) of the valve rod guide I, the outer diameter D2=1.5 x D2 (120 mm) of the valve head guide sleeve I, the outer diameter D3=2 x D1 (140 mm) of the valve head guide sleeve I, and the outer diameter D4=1.2 x D2 (144 mm) of the valve head guide sleeve I. Valve rod guide I length H11=3×d1 (120 mm), valve rod guide II length H12=2×d1 (80 mm), valve head guide I length H13=3×d1 (120 mm), valve rod guide sleeve I length H21=10×d1 (400 mm), valve head guide sleeve I length H23=10×d1 (400 mm), valve head guide sleeve I and valve head guide sleeve I are connected through threads and welding, the screw thread screwing depth is 1.2d1 (48 mm), valve rod guide I and valve rod guide sleeve I are connected through interference fit, hoop surface stress is smaller than 5MPa, valve rod guide II and valve rod guide sleeve I are connected through interference fit, hoop surface stress is smaller than 6MPa, and valve head guide I and valve head guide sleeve I are connected integrally.
And under normal temperature, the valve is subjected to no-load action test for 500 times, no jamming phenomenon occurs, and in slurry solution filled with 5% of solid content, the valve is subjected to action test for 500 times, and no jamming phenomenon occurs.
Example 2
The valve comprises a valve seat, a valve rod assembly, a valve body, a three-section valve rod guide assembly and a three-section valve rod guide sleeve assembly, wherein the valve rod guide assembly comprises a valve rod guide I, a valve rod guide II and a valve head guide I, the valve rod guide sleeve assembly comprises a valve rod guide sleeve I, a valve rod guide sleeve II and a valve head guide sleeve I, when the maximum diameter of the valve rod is D1 (40 mm), the maximum diameter of the valve head is D2 (80 mm), and the stroke M of the valve rod assembly 2 is greater than 2 x D1 (90 mm), the outer diameter D1=1.75 x D1 (70 mm), the outer diameter D2=1.5 x D2 (120 mm), the outer diameter D3=2 x D1 (140 mm), and the outer diameter D4=1.2 x D2 (144 mm) of the valve head guide sleeve I. The valve rod guide I comprises a valve rod guide I length H11=3×d1, a valve rod guide II length H12=2×d1, a valve head guide I length H13=3×d1, a valve rod guide sleeve I length H21=6×d1, a valve rod guide sleeve II length H22=3×d1, a valve head guide sleeve I length H23=10×d1, the valve rod guide sleeve I and the valve rod guide sleeve II are connected through threads and welding, the screw thread screwing depth is 1.2×d1, the valve rod guide sleeve II and the valve head guide sleeve I are connected through splines and welding, the splines are uniformly distributed 8 teeth, the splines are welded after being matched, the valve rod guide I and the valve rod guide sleeve I are connected through interference fit, the hoop surface stress is less than 5MPa, the valve rod guide II and the valve rod guide sleeve II are connected through interference fit, the hoop surface stress is less than 6MPa, and the valve head guide I and the valve head guide sleeve I are integrally connected.
And under normal temperature, the valve is subjected to no-load action test for 500 times, no jamming phenomenon occurs, and in slurry solution filled with 5% of solid content, the valve is subjected to action test for 500 times, and no jamming phenomenon occurs.
The invention has been described in detail in connection with the specific embodiments and exemplary examples thereof, but such description is not to be construed as limiting the invention. It will be understood by those skilled in the art that various equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its embodiments without departing from the spirit and scope of the present invention, and these fall within the scope of the present invention. The scope of the invention is defined by the appended claims.
What is not described in detail in the present specification is a well known technology to those skilled in the art.
Claims (11)
1. The angle valve is characterized by comprising a valve seat, a valve rod assembly, a valve body, a valve rod guide assembly and a valve rod guide sleeve assembly, wherein the valve seat is arranged at the lower part of the valve body, and the outer wall of the valve seat is matched with the inner wall of an outlet section of the valve body and is used for guiding a medium out of the valve body; the valve rod assembly comprises a valve rod and a valve head which are connected into a whole, the valve head extends inwards into the valve body, and the flow rate of medium at the outlet of the valve body is controlled through the reciprocating linear motion in the valve body; the valve rod guide assembly is fixed in the valve body through a valve cover flange and is provided with 1-6 sections of valve rod guide sleeves or 1-5 sections of valve rod guide sleeves and 1-5 sections of valve head guide sleeves, wherein the valve rod guide sleeves and the valve head guide sleeves are respectively sleeved outside the valve rod guide and the valve head guide, at least one section of valve rod guide is connected with the valve rod guide sleeve into a whole, and at least one section of valve head guide is connected with the valve head guide sleeve into a whole when the valve head guide and the valve head guide sleeve exist;
The maximum diameter of the valve rod is D1, the maximum diameter of the valve head is D2, the outer diameter D1= (1.1-3) D1 of the valve rod guide, the outer diameter D2= (1.1-3) D2 of the valve head guide, the outer diameter D3= (1.1-3) D1 of the valve rod guide sleeve, the outer diameter D4= (1.1-3) D2 of the valve head guide sleeve, the length H1 = 0.2D 1-20D 1 of the single-section valve rod guide or the valve head guide in the valve rod guide assembly, and the length H2 = 0.1D 1-40D 1 of the single-section valve rod guide sleeve or the valve head guide sleeve in the valve rod guide sleeve assembly;
The relation between the valve rod assembly travel and the segments comprises that when the valve rod assembly travel M is less than or equal to 1 x d1, the valve rod guide number is 1-2 segments, the valve head guide number is 0-1 segments, when the valve rod assembly travel is less than or equal to 1 x d1< M is less than or equal to 2 x d1, the valve rod guide number is 2-3 segments, the valve head guide number is 1-2 segments, when the valve rod assembly travel M is more than or equal to 2 x d1, the valve head guide number is 3 segments or more, and the valve head guide number is 1-3 segments;
the relation between the length of the valve rod guide sleeve assembly and the segments comprises that when the total length H of the valve rod guide sleeve assembly is less than or equal to 3 x d1, the number of the valve rod guide sleeves is 1 segment, the number of the valve head guide sleeves is 0 segment, when the total length H of the valve rod guide sleeve assembly is 3 x d1< H is less than or equal to 10 x d1, the number of the valve rod guide sleeves is 1-2 segments, the number of the valve head guide sleeves is 0-1 segment, and when the total length H of the valve rod guide sleeve assembly is more than 10 x d1, the number of the valve rod guide sleeves is 2-4 segments, and the number of the valve head guide sleeves is 0-1 segment.
2. The angle valve of claim 1, wherein when the valve stem guide assembly has only a single valve stem guide, the annular compressible material and the metal hard support ring are installed in a gap formed between the valve stem guide sleeve and the valve stem, the annular compressible material is tightly wrapped on the valve stem, and the metal hard support ring is in clearance fit with the valve stem;
When the valve rod guide assembly comprises two or more valve rod guides, the valve rod guide sleeve assembly is arranged in a gap formed by the valve rod guide sleeve assembly and the valve rod, the two or more valve rod guides, at least one section of annular compressible material and a metal hard support ring for supporting and separating adjacent valve rod guides are arranged in the gap, the annular compressible material is tightly coated on the valve rod, and the metal hard support ring is in clearance fit with the valve rod.
3. The angle valve of claim 1, wherein when the valve stem guide assembly has a single valve head guide, the single valve head guide and a metal hard support ring are installed in a gap formed by a valve head guide sleeve and a valve head, the metal hard support ring is in clearance fit with the valve head, and the support of the valve head guide in the gap is implemented by filling the gap formed by the valve head guide sleeve and the valve head through the metal hard support ring, and/or
When the valve rod guide assembly comprises two or more valve head guides, a metal hard support ring for guiding, supporting and separating adjacent valve heads is arranged in a gap formed by the valve head guide sleeve assembly and the valve heads, and the metal hard support ring is in clearance fit with the valve heads.
4. The angle valve of claim 1, wherein when the valve stem guide sleeve assembly comprises two or more valve stem guide sleeves, adjacent valve stem guide sleeves are mechanically connected by threaded section connection, welded connection, interference fit at the butt joint, or by a bolt/screw/mortise/spline connection, or by a simultaneous connection of guide connection blocks at the butt joint, and/or
When the valve rod guide sleeve assembly comprises at least one valve rod guide sleeve and a valve head guide sleeve, the adjacent valve rod guide sleeves and the valve head guide sleeve are connected in a mechanical mode of threaded section connection, welding connection and interference fit at the butt joint position, or are connected in a mode of connecting a bolt/screw/mortise-tenon joint/spline or are connected in a mode of simultaneously connecting a guide connecting block at the butt joint position.
5. The angle valve of claim 1, wherein the valve stem guide sleeve or the valve stem guide sleeve and the valve head guide sleeve are connected by forming a threaded section at the butt joint, the screw depth is not less than 0.5 x d1, and/or
When the valve rod guide sleeve or the valve rod guide sleeve and the valve head guide sleeve are connected by welding, intermittent welding is not allowed to be adopted, and/or
When the valve rod guide sleeves or the valve rod guide sleeves and the valve head guide sleeves are connected in an interference fit mechanical mode, the stress of the circumferential surface is not more than 10MPa, and/or
When the valve rod guide sleeves or the valve rod guide sleeve and the valve head guide sleeve are connected in the form of a connecting piece of a bolt/a screw/a mortise/a spline, the axial pressing force is not lower than 5MPa, and/or
When the valve rod guide sleeves or the valve rod guide sleeves and the valve head guide sleeves are connected in a mode that the guide connecting blocks are simultaneously connected at the butt joint part, the inner diameter of the guide connecting blocks is not less than 2 x d1, and the height is 0.2 x d 1-5 x d1.
6. The angle valve of claim 1, wherein the valve stem guide assembly has a material hardness less than a material hardness of the valve stem assembly.
7. The design method of the angle valve is characterized by comprising a valve seat, a valve rod assembly, a valve body, a valve rod guide assembly and a valve rod guide sleeve assembly, wherein the valve seat is arranged at the lower part of the valve body, the outer wall of the valve seat is matched with the inner wall of an outlet section of the valve body and is used for guiding medium out of the valve body, the valve rod assembly comprises a valve rod and a valve head which are connected into a whole, the valve head extends inwards into the valve body, and the flow rate of medium at the outlet of the valve body is controlled through reciprocating linear motion in the valve body, and the design method comprises the following steps:
The valve rod guide assembly is designed to have 1-6 sections of valve rod guide or 1-6 sections of valve rod guide and valve head guide, wherein the valve rod guide is arranged outside the valve rod, and the valve head guide is arranged outside the valve head and used for guiding the valve rod assembly when the valve rod assembly reciprocates; the valve rod guide sleeve assembly is fixed on the valve body through a valve cover flange, the valve rod guide sleeve assembly is designed to be provided with 1-5 sections of valve rod guide sleeves or 1-5 sections of valve rod guide sleeves and valve head guide sleeves, the valve rod guide sleeves and the valve head guide sleeves are respectively sleeved outside the valve rod guide and the valve head guide sleeves, at least one section of valve rod guide is connected with the valve rod guide sleeve into a whole, and at least one section of valve head guide is connected with the valve head guide sleeve into a whole when the valve head guide and the valve head guide sleeve exist;
The maximum diameter of the valve rod is D1, the maximum diameter of the valve head is D2, the external diameter D1= (1.1-3) D1 of the valve rod guide is determined, the external diameter D2= (1.1-3) D2 of the valve head guide is determined, the external diameter D3= (1.1-3) D1 of the valve rod guide sleeve is determined, the external diameter D4= (1.1-3) D2 of the valve head guide sleeve is determined, the length H1=0.2D 1-20D 1 of the single-section valve rod guide or the valve head guide in the valve rod guide assembly is determined, and the length H2= 0.1D 1-40D 1 of the single-section valve rod guide sleeve or the valve head guide sleeve in the valve rod guide sleeve assembly;
Determining the relation between the valve rod assembly travel and the segments, wherein when the valve rod assembly travel M is less than or equal to 1 x d1, the valve rod guide number is 1-2 segments, and the valve head guide number is 0-1 segments, when the valve rod assembly travel is less than or equal to 1 x d1< M is less than or equal to 2 x d1, the valve rod guide number is 2-3 segments, and the valve head guide number is 1-2 segments, and when the valve rod assembly travel M is more than or equal to 2 x d1, the valve head guide number is 3 segments or more, and the valve head guide number is 1-3 segments;
The relation between the length of the valve rod guide sleeve assembly and the segments is determined, wherein when the total length H of the valve rod guide sleeve assembly is less than or equal to 3 x d1, the number of the valve rod guide sleeves is 1 segment, the number of the valve head guide sleeves is 0 segment, when the total length H of the valve rod guide sleeve assembly is 3 x d1< H is less than or equal to 10 x d1, the number of the valve rod guide sleeves is 1-2 segments, the number of the valve head guide sleeves is 0-1 segment, and when the total length H of the valve rod guide sleeve assembly is more than 10 x d1, the number of the valve rod guide sleeves is 2-4 segments, and the number of the valve head guide sleeves is 0-1 segment.
8. The method of designing according to claim 7, wherein when the stem guide assembly has only a single stem guide, the annular compressible material and the metal hard support ring are installed in the gap formed between the stem guide sleeve and the stem, the annular compressible material is tightly wrapped around the stem, and the metal hard support ring is in clearance fit with the stem;
When the valve rod guide assembly comprises two or more valve rod guides, the two or more valve rod guides, at least one section of annular compressible material and a metal hard support ring for supporting and separating adjacent valve rod guides are arranged in a gap formed by the valve rod guide sleeve assembly and the valve rod, the annular compressible material is tightly coated on the valve rod, and the metal hard support ring is in clearance fit with the valve rod.
9. The method of claim 7, wherein when the stem guide assembly has a single valve head guide, the single valve head guide and a metal hard support ring are installed in a gap formed between a valve head guide sleeve and a valve head, the metal hard support ring is in clearance fit with the valve head, and the support of the valve head guide in the gap is performed by filling the gap formed between the valve head guide sleeve and the valve head with the metal hard support ring, and/or
When the valve rod guide assembly comprises two or more valve head guides, the metal hard support rings for supporting and separating the adjacent valve head guides are arranged in the gap formed by the valve head guide sleeve assembly and the valve head, and the metal hard support rings are in clearance fit with the valve heads.
10. The method of claim 7, wherein when the stem guide sleeve assembly comprises two or more stem guide sleeves, adjacent stem guide sleeves are mechanically connected by threaded segments, welded connections, interference fit at the interface, or by bolts/screws/mortise/spline connections, or by simultaneously connecting pilot connection blocks at the interface, and/or
When the valve rod guide sleeve assembly comprises at least one valve rod guide sleeve and a valve head guide sleeve, the adjacent valve rod guide sleeves and the valve head guide sleeve are connected in a mechanical mode of threaded section connection, welding connection and interference fit at the butt joint position, or are connected in a mode of connecting a bolt/screw/mortise-tenon joint/spline or are connected in a mode of simultaneously connecting a guide connecting block at the butt joint position.
11. The method according to claim 7, wherein when the stem guide bush or the stem guide bush and the valve head guide bush are connected by using a thread segment formed at the butt portion, the screw-in depth is determined to be not less than 0.5 x d1, and/or
When the valve rod guide sleeve or the valve rod guide sleeve and the valve head guide sleeve are connected by welding, intermittent welding is not adopted, and/or
When the valve rod guide sleeves or the valve rod guide sleeves and the valve head guide sleeves are connected in an interference fit mechanical mode, the stress of the circumferential surface is not more than 10MPa, and/or
When the valve rod guide sleeves or the valve rod guide sleeve and the valve head guide sleeve are connected in the form of a connecting piece of a bolt/a screw/a mortise/a spline, the axial pressing force is determined to be not lower than 5MPa, and/or
When the valve rod guide sleeves or the valve rod guide sleeves and the valve head guide sleeves are connected in a mode that the guide connecting blocks are simultaneously connected at the butt joint part, the inner diameter of the guide connecting blocks is not smaller than 2 x d1, and the height is 0.2 x d 1-5 x d1.
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| JPH07317920A (en) * | 1994-05-24 | 1995-12-08 | Yamatake Honeywell Co Ltd | Valve device |
| WO2001071228A1 (en) * | 2000-03-21 | 2001-09-27 | Tuchenhagen Gmbh | Aseptical leakage-controlled double-sealing valve with seat cleaning function |
| US20050166971A1 (en) * | 2004-01-31 | 2005-08-04 | Gennady Arov | Y-pattern piston check valve, piston valve assembly for a Y-pattern piston check valve, and method |
| CN201110385Y (en) * | 2007-12-05 | 2008-09-03 | 施大钟 | Angle-shaped regulating valve |
| CN202992207U (en) * | 2012-11-15 | 2013-06-12 | 无锡智能自控工程股份有限公司 | Inward-expanding disc type regulation line pipe angle valve capable of being regulated, opened and closed |
| CN203335891U (en) * | 2013-05-27 | 2013-12-11 | 北京航天动力研究所 | Angle valve with two-section valve stem guiding structure |
| CN204922022U (en) * | 2015-09-10 | 2015-12-30 | 浙江贝尔控制阀门有限公司 | Bellows low temperature governing valve |
| CN206754404U (en) * | 2016-12-26 | 2017-12-15 | 金洪水 | The core assembly of pilot-operated type self-locking stop valve |
| DE102018123544A1 (en) * | 2018-09-25 | 2020-03-26 | Samson Aktiengesellschaft | Control valve with bellows seal |
| CN208900744U (en) * | 2018-10-09 | 2019-05-24 | 无锡凯尔克仪表阀门有限公司 | A kind of low-temperature angle valve convenient for safeguarding |
| CN111609147A (en) * | 2019-02-26 | 2020-09-01 | 北京航天石化技术装备工程有限公司 | High-pressure reinforced guide type angle valve for quenching circulation of coal stove |
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| CN215410247U (en) * | 2021-06-17 | 2022-01-04 | 北京航天石化技术装备工程有限公司 | Angle valve |
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