Angle valve and design method thereof

Abstract

The present invention provides an angle valve and a design method thereof, comprising a valve seat, a valve stem assembly, a valve body, a valve stem guide assembly and a valve stem guide sleeve assembly, wherein the valve stem guide assembly has 1 to 6 sections of valve stem guides, or 1 to 6 sections of valve stem guides and valve head guides, wherein the valve stem guide is arranged outside the valve stem, and the valve head guide is arranged outside the valve head; the valve stem guide sleeve assembly is fixed in the valve body through a valve cover flange, and has 1 to 5 sections of valve stem guide sleeves, or 1 to 5 sections of valve stem guide sleeves and valve head guide sleeves, wherein the valve stem guide sleeve and the valve head guide sleeve are arranged outside the valve stem guide and the valve head guide, respectively, and at least one section of the valve stem guide is connected to the valve stem guide sleeve as a whole, and at least one section of the valve head guide is connected to the valve head guide sleeve as a whole, and based on the valve stem structure and motion parameters, the arrangement mode and structural parameters of the guide structure are designed. The angle valve and the design method thereof in the present invention realize efficient and high-accuracy smooth movement under high solid content and high pressure difference working conditions.

Description

Technical Field

[0001] The invention belongs to the technical field of valve design, and particularly relates to an angle valve used in working conditions where the medium contains solids, is prone to vibration, and is prone to jamming, and a design method thereof. Background Art

[0002] In the petrochemical, coal chemical, metallurgical, sewage treatment and other industries, some key process control valves are in high solid content or even gas-liquid-solid three-phase flow conditions. Especially under high pressure difference conditions, the valves are prone to vibration and jamming, so it is necessary to design valves with stem guide structures. However, some guide structures have a large aspect ratio and are difficult to process and assemble, so it is necessary to design a multi-stage stem guide structure.

[0003] The existing multi-section valve stem guide structure lacks design standards for its layout and structural parameters. Even if it is set as a multi-section valve stem guide structure, vibration, jamming and the like may still occur due to unreasonable layout and structural parameter design of each section of the valve stem guide structure. The valve stem guide structure has to be repeatedly explored and designed and repeatedly tried and failed, which makes the improvement effect of the valve unpredictable and the improvement efficiency low. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an angle valve and a design method thereof. Based on the valve stem structure and motion parameters, the arrangement and structural parameters of the guide structure are designed, so as to achieve smooth valve movement and prevent vibration or jamming with high efficiency and high accuracy under working conditions of high solid content and high pressure difference.

[0005] The technical solution provided by the present invention is as follows:

[0006] In the first aspect, an angle valve comprises a valve seat, a valve stem assembly, a valve body, a valve stem guide assembly and a valve stem guide sleeve assembly, wherein the valve seat is arranged at the lower part of the valve body, and the outer wall cooperates with the inner wall of the valve body outlet section to guide the medium out of the valve body; the valve stem assembly comprises a valve stem and a valve head connected as one body, which extends into the valve body with the valve head inwardly, and controls the flow rate of the medium at the valve body outlet through reciprocating linear motion in the valve body; the valve stem guide assembly has 1 to 6 valve stem guide sections, or 1 to 6 valve stem guide sections and valve head guide sections, wherein the valve stem guide The guide sleeve is arranged outside the valve stem, and the valve head guide is arranged outside the valve head, which is used to guide the valve stem assembly when it reciprocates; the valve stem guide sleeve assembly is fixed in the valve body through the valve cover flange, and has 1 to 5 sections of valve stem guide sleeves, or 1 to 5 sections of valve stem guide sleeves and valve head guide sleeves, wherein the valve stem guide sleeve and the valve head guide sleeve are respectively sleeved outside the valve stem guide and the valve head guide, and at least one section of the valve stem guide is connected to the valve stem guide sleeve as a whole, and when there is a valve head guide and a valve head guide sleeve, at least one section of the valve head guide is connected to the valve head guide sleeve as a whole;

[0007] The maximum diameter of the valve stem is d1, the maximum diameter of the valve head is d2, the outer diameter of the valve stem guide D1 = (1.1~3)*d1, the outer diameter of the valve head guide D2 = (1.1~3)*d2, the outer diameter of the valve stem guide sleeve D3 = (1.1~3)*D1, the outer diameter of the valve head guide sleeve D4 = (1.1~3)*D2; the length of a single-section valve stem guide or valve head guide in the valve stem guide assembly H1 = 0.2*d1~20*d1; the length of a single-section valve stem guide sleeve or valve head guide sleeve in the valve stem guide sleeve assembly H2 = 0.1*d1~40*d1.

[0008] The relationship between the stroke and segmentation of the valve stem assembly includes: when the stroke of the valve stem assembly M≤1*d1, the number of the valve stem guides is 1 to 2 segments, and the number of the valve head guides is 0 to 1 segment; when the stroke of the valve stem assembly is 1*d1<M≤2*d1, the number of the valve stem guides is 2 to 3 segments, and the number of the valve head guides is 1 to 2 segments; when the stroke of the valve stem assembly M>2*d1, the number of the valve stem guides is 3 segments or more, and the number of the valve head guides is 1 to 3 segments.

[0009] The relationship between the length and segmentation of the valve stem guide sleeve assembly includes: when the total length of the valve stem guide sleeve assembly is H≤3*d1, the number of the valve stem guide sleeves is 1 segment, and the number of the valve head guide sleeves is 0 segment; when the total length of the valve stem guide sleeve assembly is 3*d1<H≤10*d1, the number of the valve stem guide sleeves is 1 to 2 segments, and the number of the valve head guide sleeves is 0 to 1 segment; when the total length of the valve stem guide sleeve assembly is H>10*d1, the number of the valve stem guide sleeves is 2 to 4 segments, and the number of the valve head guide sleeves is 0 to 1 segment.

[0010] In a second aspect, a design method of an angle valve is provided, wherein the angle valve comprises a valve seat, a valve stem assembly, a valve body, a valve stem guide assembly and a valve stem guide sleeve assembly, wherein the valve seat is arranged at the lower part of the valve body, and the outer wall cooperates with the inner wall of the valve body outlet section to guide the medium out of the valve body; the valve stem assembly comprises a valve stem and a valve head connected as one body, wherein the valve head extends inwardly into the valve body, and controls the flow rate of the medium at the valve body outlet through reciprocating linear motion in the valve body; the design method comprises:

[0011] The valve stem guide assembly is designed to have 1 to 6 sections of valve stem guides, or 1 to 6 sections of valve stem guides and valve head guides, wherein the valve stem guide is arranged outside the valve stem, and the valve head guide is arranged outside the valve head, for guiding the valve stem assembly when it reciprocates; the valve stem guide sleeve assembly is fixed to the valve body through the valve cover flange, and the valve stem guide sleeve assembly is designed to have 1 to 5 sections of valve stem guide sleeves, or 1 to 5 sections of valve stem guide sleeves and valve head guide sleeves, wherein the valve stem guide sleeve and the valve head guide sleeve are respectively sleeved outside the valve stem guide and the valve head guide, and at least one section of the valve stem guide is connected to the valve stem guide sleeve as a whole, and when there is a valve head guide and a valve head guide sleeve, at least one section of the valve head guide is connected to the valve head guide sleeve as a whole;

[0012] The maximum diameter of the valve stem is d1, and the maximum diameter of the valve head is d2. The outer diameter of the valve stem guide is D1 = (1.1~3)*d1, the outer diameter of the valve head guide is D2 = (1.1~3)*d2, the outer diameter of the valve stem guide sleeve is D3 = (1.1~3)*D1, and the outer diameter of the valve head guide sleeve is D4 = (1.1~3)*D2; the length of a single-section valve stem guide or valve head guide in the valve stem guide assembly is H1 = 0.2*d1~20*d1; the length of a single-section valve stem guide sleeve or valve head guide sleeve in the valve stem guide sleeve assembly is H2 = 0.1*d1~40*d1.

[0013] Determine the relationship between the stroke and segmentation of the valve stem assembly: when the stroke of the valve stem assembly is M≤1*d1, the number of the valve stem guides is 1 to 2 segments, and the number of the valve head guides is 0 to 1 segment; when the stroke of the valve stem assembly is 1*d1<M≤2*d1, the number of the valve stem guides is 2 to 3 segments, and the number of the valve head guides is 1 to 2 segments; when the stroke of the valve stem assembly is M>2*d1, the number of the valve stem guides is 3 segments or more, and the number of the valve head guides is 1 to 3 segments;

[0014] Determine the relationship between the length and segmentation of the valve stem guide sleeve assembly: when the total length of the valve stem guide sleeve assembly is H≤3*d1, the number of the valve stem guide sleeves is 1 segment, and the number of the valve head guide sleeves is 0 segment; when the total length of the valve stem guide sleeve assembly is 3*d1<H≤10*d1, the number of the valve stem guide sleeves is 1 to 2 segments, and the number of the valve head guide sleeves is 0 to 1 segment; when the total length of the valve stem guide sleeve assembly is H>10*d1, the number of the valve stem guide sleeves is 2 to 4 segments, and the number of the valve head guide sleeves is 0 to 1 segment.

[0015] An angle valve and a design method thereof provided by the present invention have the following beneficial effects:

[0016] The angle valve and design method provided by the present invention designs the arrangement and structural parameters of the guide structure based on the valve stem structure and motion parameters, and achieves smooth valve movement and prevents vibration or jamming under high solid content and high pressure difference working conditions with high efficiency and high accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a valve with a multi-stage valve stem guide structure, which has a two-stage valve stem guide assembly and a two-stage valve stem guide sleeve assembly;

[0018] Figure 2 A schematic diagram of a valve with a multi-stage valve stem guide structure, which has a three-stage valve stem guide assembly and a two-stage valve stem guide sleeve assembly;

[0019] Figure 3 A schematic diagram of a valve with a multi-stage valve stem guide structure, which has a three-stage valve stem guide assembly and a three-stage valve stem guide sleeve assembly;

[0020] Figure 4 It is a schematic diagram of the guide sleeve I and the guide sleeve II being connected by welding;

[0021] Figure 5 It is a schematic diagram of the guide sleeve I and the guide sleeve II being connected by threads;

[0022] Figure 6 Schematic diagram of guide sleeve I and guide sleeve II connected by spline, the left figure is a longitudinal section view, and the right figure is an AA transverse section view;

[0023] Figure 7 A schematic diagram of the guide sleeve I and the guide sleeve II being connected by end compression;

[0024] Figure 8 It is a schematic diagram of the guide sleeve I and the guide sleeve III being connected by threads;

[0025] Fig. 9 A schematic diagram of the guide sleeve I and the guide sleeve III being connected by end compression;

[0026] Fig.10 Schematic diagram of guide sleeve I and guide sleeve III connected by spline, the left figure is a longitudinal section view, and the right figure is a BB transverse section view;

[0027] Fig.11 It is a schematic diagram of the connection between the guide sleeve I and the guide sleeve II and the guide connecting block at the same time;

[0028] Fig.12This is a schematic diagram of the connection method of a valve stem guide and a valve stem guide sleeve. The left picture shows a welding connection method, the middle picture shows a combination of threaded connection + welding connection method, and the right picture shows a combination of gap or transition or interference fit + end clamping connection method.

[0029] Description of Figure Numbers

[0030] 1-valve seat; 2-valve stem assembly; 3-valve body; 4-valve stem guide I; 5-valve stem guide II; 6-valve stem guide sleeve I; 7-valve stem guide sleeve II; 8-valve head guide I; 9-valve head guide sleeve I; 10-guide connecting block; 11-annular compressible material; 12-metal hard support ring. DETAILED DESCRIPTION

[0031] The following detailed description of the present invention will make the features and advantages of the present invention more clear and explicit.

[0032] The word "exemplary" is used exclusively 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 shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise noted.

[0033] According to a first aspect of the present invention, there is provided an angle valve, such as Figure 1 to Figure 3 As shown, it includes 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 is arranged at the lower part of the valve body 3, and the outer wall cooperates with the inner wall of the outlet section of the valve body 3 to guide the medium out of the valve body 3; the valve stem assembly 2 includes a valve stem and a valve head connected as one body, which extends into the valve body 3 with the valve head facing inward, and the reciprocating linear motion of the valve stem assembly 2 in the valve body 3 controls the flow rate of the medium at the outlet of the valve body; the valve stem guide assembly has 1 to 6 valve stem guide sections, or 1 to 6 valve stem guide and valve head guide sections, wherein the valve stem guide is arranged On the outside of the valve stem, a valve head guide is arranged on the outside of the valve head, and is used to guide the valve stem assembly 2 when it reciprocates; the valve stem guide sleeve assembly is fixed in the valve body 3 through the valve cover flange, and has 1 to 5 sections of valve stem guide sleeves, or 1 to 5 sections of valve stem guide sleeves and valve head guide sleeves, wherein the valve stem guide sleeve and the valve head guide sleeve are respectively sleeved on the outside of the valve stem guide and the valve head guide, and at least one section of the valve stem guide is connected to the valve stem guide sleeve as a whole. When there is a valve head guide and a valve head guide sleeve, at least one section of the valve head guide is connected to the valve head guide sleeve as a whole, so as to maintain the relative position of the valve stem guide assembly on the valve body 3;

[0034] The maximum diameter of the valve stem is d1, the maximum diameter of the valve head is d2, the outer diameter D1 of the valve stem guide is (1.1-3)*d1, the outer diameter D2 of the valve head guide is (1.1-3)*d2, the outer diameter D3 of the valve stem guide sleeve is (1.1-3)*D1, and the outer diameter D4 of the valve head guide sleeve is (1.1-3)*D2; the length H1 of a single-section valve stem guide or valve head guide in the valve stem guide assembly is 0.2*d1-20*d1; the length H2 of a single-section valve stem guide sleeve or valve head guide sleeve in the valve stem guide sleeve assembly is 0.1*d1-40*d1;

[0035] The relationship between the stroke and segmentation of the valve stem assembly includes: when the stroke of the valve stem assembly 2 is M≤1*d1, the number of the valve stem guides is 1 to 2 segments, and the number of the valve head guides is 0 to 1 segment; when the stroke of the valve stem assembly 2 is 1*d1<M≤2*d1, the number of the valve stem guides is 2 to 3 segments, and the number of the valve head guides is 1 to 2 segments; when the stroke of the valve stem assembly 2 is M>2*d1, the number of the valve stem guides is 3 segments or more, and the number of the valve head guides is 1 to 3 segments, see Table 1;

[0036] Table 1 Relationship between valve stem assembly stroke and segmentation

[0037] Valve stem assembly travel Number of stem guides Number of valve head guides M≤1*d1 1-2 sections 0-1 stage 1*d1<M≤2*d1 2-3 sections 1-2 sections M>2*d1 3 sections and above 1-3 sections

[0038] The relationship between the length and segmentation of the valve stem guide sleeve assembly includes: when the total length of the valve stem guide sleeve assembly is H≤3*d1, the number of the valve stem guide sleeves is 1 segment, and the number of the valve head guide sleeves is 0 segment; when the total length of the valve stem guide sleeve assembly is 3*d1<H≤10*d1, the number of the valve stem guide sleeves is 1 to 2 segments, and the number of the valve head guide sleeves is 0 to 1 segment; when the total length of the valve stem guide sleeve assembly is H>10*d1, the number of the valve stem guide sleeves is 2 to 4 segments, and the number of the valve head guide sleeves is 0 to 1 segment, see Table 2.

[0039] Table 2 Relationship between stem guide sleeve assembly length and segmentation

[0040] Total length of guide sleeve assembly Number of stem guide sleeves Number of valve head guide sleeves H≤3*d1 1 segment 0 segment 3*d1<H≤10*d1 1-2 sections 0-1 stage H>10*d1 2-4 sections 0-1 stage

[0041] The inventors found in production that the multi-stage valve stem guide structure can certainly reduce the vibration and jamming of the valve. However, the layout and structural parameters of the multi-stage valve stem guide structure lack design standards. Even if it is set as a multi-stage valve stem guide structure, in the case of high-pressure and high-solid content fluid, vibration, jamming and other problems still exist due to the unreasonable layout and structural parameter design of each stage of the valve stem guide structure. It is necessary to repeatedly explore and design the valve stem guide structure and conduct repeated trial and error, which makes the improvement effect of the valve lack of predictability and the improvement efficiency is low. After a lot of research and repeated verification, the inventors determined the results of Tables 1 and 2 above. For Table 1: For valve stems with different strokes M, if no guide is set, there will be vibration, deformation, and coaxiality cannot be guaranteed; setting too many guides will cause the valve stem to be over-positioned. When the number of guides increases, in order to ensure the geometric shape and position tolerances between different guides, the difficulty of product processing and manufacturing will be greatly increased. Therefore, the distribution results in the table are obtained through repeated experiments.

[0042] For Table 2: Affected by factors such as valve body size and valve stroke, the ratio of the total length H of the valve stem guide sleeve assembly to the maximum outer diameter d1 of the valve stem has a large span. On the one hand, the ratio of H to d1 determines the difficulty of processing the guide sleeve, such as the control of form and position tolerances such as cylindricity; on the other hand, it also affects the difficulty of positioning and assembling between the valve stem and the valve stem guide assembly, further affecting the performance of the valve stem. The distribution results in the table were obtained through repeated exploration.

[0043] Through Table 1 and Table 2, combined with the stroke of the valve stem assembly and the total length of the guide sleeve assembly, the quantity of the valve stem guide, valve head guide, valve stem guide sleeve and valve head guide sleeve can be determined.

[0044] In a preferred embodiment, the length of the single-stage valve stem guide or valve head guide in the valve stem guide assembly is H1 = 0.2*d1 to 20*d1, preferably H1 = 1*d1 to 10*d1. Within the above range, especially within 1*d1 to 10*d1, the valve stem assembly 2 reciprocates linearly for more than 500 times without jamming.

[0045] In a preferred embodiment, the length of a single-section valve stem guide sleeve or valve head guide sleeve in the valve stem guide sleeve assembly is H2=0.1*d1~40*d1, preferably H2=1*d1~10*d1. In the above range, in particular, 1*d1~10*d1. If the length of a single section in the valve stem guide assembly and the valve stem guide sleeve assembly is too short and below the above range, it cannot play a guiding role. If it exceeds the above range, it will cause over-positioning between the valve stem and the valve stem guide, and over-positioning between the valve stem guide and the valve stem guide sleeve. Especially in working conditions containing solid particles, as long as a small amount of solid particles enter the gap between the valve stem and the valve stem guide valve, and between the valve stem guide and the valve stem guide sleeve, the valve stem will be scratched, or even unable to move, which seriously affects its service life.

[0046] In a preferred embodiment, the valve stem guide assembly has only a single valve stem guide such as the valve stem guide II 5 located on the upper part of the valve stem, and the single valve stem guide, annular compressible material and metal hard support ring are installed in the gap formed by 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 matched with the valve stem gap. By filling the gap formed by the valve stem guide sleeve and the valve stem with the annular compressible material and the metal hard support ring, not only can the valve stem guide be supported, but it is also beneficial to prevent the fluid medium from leaking from the valve stem.

[0047] like Figure 1 As shown, when the valve stem guide assembly includes two or more valve stem guides such as the valve stem guide I 4 located in the middle of the valve stem and the valve stem guide II 5 located in the upper part of the valve stem, the two or more valve stem guides, at least one section of annular compressible material 11 and a metal hard support ring 12 for supporting and separating adjacent valve stem guides are installed in the gap formed by the valve stem guide sleeve assembly and the valve stem, the annular compressible material is tightly coated on the valve stem, and the metal hard support ring is in gap fit with the valve stem.

[0048] In a preferred embodiment, Figure 2 As shown, the valve stem guide assembly has a single valve head guide such as the valve head guide 18 located at the upper part of the valve head. The single valve head guide and the metal hard support ring are installed in the gap formed by the valve head guide sleeve and the valve head. The metal hard support ring cooperates with the valve head gap. The metal hard support ring is filled in the gap formed by the valve head guide sleeve and the valve head to support the valve head guide in the gap.

[0049] When the valve stem guide assembly includes two or more valve head guides, the gap formed by the valve head guide sleeve assembly and the valve head is installed with the two or more valve head guides, and the metal hard support rings that support and separate adjacent valve head guides are matched with the valve head gap.

[0050] In a preferred embodiment, when the valve stem guide sleeve assembly includes two or more valve stem guide sleeves, such as valve stem guide sleeve I 6 and valve stem guide sleeve II 7 located at the valve stem portion, adjacent valve stem guide sleeves are connected by processing threaded sections at the butt joints ( Figure 5 )、Welding connection( Figure 4 ), interference fit and other mechanical connections, or bolts / screws / mortise and tenon joints / splines ( Figure 6 ) / End clamping( Figure 7 ) or other connecting pieces, or by connecting the guide connecting block 10 at the butt joint ( Fig.11 ).

[0051] When the valve stem guide sleeve assembly includes at least one valve stem guide sleeve and a valve head guide sleeve, such as a valve stem guide sleeve 16 located at the valve stem portion and a valve head guide sleeve 19 located at the valve head portion, adjacent valve stem guide sleeves and valve head guide sleeves are connected by processing threaded sections at the butt joints ( Figure 8 ), welding connection, interference fit and other mechanical connections, or bolts / screws / mortise and tenon joints / splines ( Fig.10 ) / End clamping( Fig. 9 ) or other connecting pieces, or by connecting a guide connecting block at the butt joint.

[0052] When the threaded section is processed at the butt joint, the screw-in depth shall not be less than 0.5*d1;

[0053] When welding is used for connection, intermittent welding is not allowed;

[0054] When mechanical connections such as interference fit are used, the annular surface stress shall not exceed 10MPa. If it exceeds the above threshold, thermal stress concentration will occur at the connection between the stem guide sleeve and the valve head guide sleeve under high temperature and other operating conditions, resulting in severe deformation and affecting performance.

[0055] When bolts / screws / mortise and tenon joints / spline / end clamping are used for connection, the axial clamping force shall not be less than 5MPa to prevent the structure from loosening due to insufficient clamping force, the introduction of solid-containing media due to increased gaps, and the occurrence of fractures at the connection parts under high temperature and vibration conditions;

[0056] When the guide connection block is connected at the butt joint at the same time, the inner diameter of the guide connection block is not less than 2*d1, and the height is 0.2*d1 to 5*d1.

[0057] In a preferred embodiment, the valve stem guide and the valve stem guide sleeve or the valve head guide and the valve head guide sleeve are connected by mechanical means such as threaded connection, welding, interference fit, etc. at the docking position, or connected by bolts / screws / mortise and tenon joints / spline / end clamping, or connected by connecting guide connection blocks at the docking position and a combination of the above methods. Fig.12 The left is the welding connection method. Fig.12 The middle one is a combination of threaded connection + welding connection. Fig.12 The right side shows a combination of clearance or transition or interference fit + end clamping connection.

[0058] When the threaded section is processed at the butt joint, the screw-in depth shall not be less than 0.5*d1;

[0059] When welding is used for connection, intermittent welding is not allowed;

[0060] When mechanical connection such as interference fit is adopted, the circumferential surface stress shall not exceed 10MPa;

[0061] When bolts / screws / mortise and tenon joints / spline / end clamping and other connectors are used for connection, the axial clamping force shall not be less than 5MPa;

[0062] When the guide connection block is connected at the butt joint at the same time, the inner diameter of the guide connection block is not less than 2*d1, and the height is 0.2*d1 to 5*d1.

[0063] Preferably, if Figure 3As shown, the valve in the present invention includes 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; wherein the valve stem guide assembly includes a valve stem guide I, a valve stem guide II and a valve head guide I, and the valve stem guide sleeve assembly includes a valve stem guide sleeve I, a valve stem guide sleeve II and a valve head guide sleeve I; assuming that the maximum diameter of the valve stem is d1, the maximum diameter of the valve head is d2 and the stroke M of the valve stem assembly 2 is greater than 2*d1, the outer diameter D1 of the valve stem guides I~II is 1.75*d1, and the outer diameter D2 of the valve head guide I is 1.5*d2; the outer diameter D3 of the valve stem guide sleeves I~II is 2*D1, and the outer diameter D4 of the valve head guide sleeve I is 1.2*D2; The length of valve stem guide I is H11=3*d1, the length of valve stem guide II is H12=2*d1, and the length of valve head guide I is H13=3*d1; the length of valve stem guide sleeve I is H21=6*d1, the length of valve stem guide sleeve II is H22=3*d1, and the length of valve head guide sleeve I is H23=10*d1; the valve stem guide sleeve I and the valve stem guide sleeve II are connected by threads and welding, and the thread screw-in depth is 1.2*d1; the valve stem guide sleeve II and the valve head guide sleeve I are connected by splines and welding, and the splines are evenly distributed with 8 teeth, and the splines are welded after matching; the valve stem guide I and the valve stem guide sleeve I are connected by interference fit, and the annular surface stress is less than 5MPa; the valve stem guide II and the valve stem guide sleeve II are connected by interference fit, and the annular surface stress is less than 8MPa; the valve head guide I and the valve head guide sleeve I are connected as one piece.

[0064] In a preferred embodiment, the material hardness of the valve stem guide assembly is less than that of the valve stem assembly, so as to prevent damage to the surface of the valve stem assembly, thereby preventing a large gap between the valve stem assembly and the valve stem guide assembly, and causing jamming after solid media enters.

[0065] According to a second aspect of the present invention, a design method for an angle valve is provided, wherein the angle valve comprises 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, wherein the valve seat 1 is arranged at the lower part of the valve body 3, and the outer wall cooperates with the inner wall of the outlet section of the valve body 3 to guide the medium out of the valve body 3; the valve stem assembly 2 comprises a valve stem and a valve head connected as one body, which extends into the valve body 3 with the valve head facing inward, and the medium flow rate at the valve body outlet is controlled by the reciprocating linear motion of the valve stem assembly 2 in the valve body 3; the design method comprises:

[0066] The valve stem guide assembly is designed to have 1 to 6 sections of valve stem guides, or 1 to 6 sections of valve stem guides and valve head guides, wherein the valve stem guide is arranged outside the valve stem, and the valve head guide is arranged outside the valve head, for guiding the valve stem assembly 2 when it reciprocates; the valve stem guide sleeve assembly is fixed to the valve body 3 through the valve cover flange, and the valve stem guide sleeve assembly is designed to have 1 to 5 sections of valve stem guide sleeves, or 1 to 5 sections of valve stem guide sleeves and valve head guide sleeves, wherein the valve stem guide sleeve and the valve head guide sleeve are respectively sleeved outside the valve stem guide and the valve head guide, and at least one section of the valve stem guide is connected to the valve stem guide sleeve as a whole, and when there is a valve head guide and a valve head guide sleeve, at least one section of the valve head guide is connected to the valve head guide sleeve as a whole, so as to maintain the relative position of the valve stem guide assembly on the valve body 3;

[0067] The maximum diameter of the valve stem is d1, the maximum diameter of the valve head is d2, the outer diameter D1 of the valve stem guide is determined to be (1.1-3)*d1, the outer diameter D2 of the valve head guide is determined to be (1.1-3)*d2, the outer diameter D3 of the valve stem guide sleeve is determined to be (1.1-3)*D1, the outer diameter D4 of the valve head guide sleeve is determined to be (1.1-3)*D2, the length H1 of a single-section valve stem guide or valve head guide in the valve stem guide assembly is determined to be 0.2*d1-20*d1, the length H2 of a single-section valve stem guide sleeve or valve head guide sleeve in the valve stem guide sleeve assembly is determined to be 0.1*d1-40*d1;

[0068] Determine the relationship between the stroke and segmentation of the valve stem assembly: when the stroke M of the valve stem assembly 2 is less than or equal to 1*d1, the number of the valve stem guides is 1 to 2 segments, and the number of the valve head guides is 0 to 1 segment; when the stroke of the valve stem assembly 2 is 1*d1<M≤2*d1, the number of the valve stem guides is 2 to 3 segments, and the number of the valve head guides is 1 to 2 segments; when the stroke M of the valve stem assembly 2 is greater than 2*d1, the number of the valve stem guides is 3 segments or more, and the number of the valve head guides is 1 to 3 segments;

[0069] Determine the relationship between the length and segmentation of the valve stem guide sleeve assembly: when the total length of the valve stem guide sleeve assembly is H≤3*d1, the number of the valve stem guide sleeves is 1 segment, and the number of the valve head guide sleeves is 0 segment; when the total length of the valve stem guide sleeve assembly is 3*d1<H≤10*d1, the number of the valve stem guide sleeves is 1 to 2 segments, and the number of the valve head guide sleeves is 0 to 1 segment; when the total length of the valve stem guide sleeve assembly is H>10*d1, the number of the valve stem guide sleeves is 2 to 4 segments, and the number of the valve head guide sleeves is 0 to 1 segment.

[0070] In the design method of the present invention, the length of the single-section valve stem guide or valve head guide in the valve stem guide assembly is preferably H1=1*d1~10*d1.

[0071] 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*d1~10*d1.

[0072] In the design method of the present invention, when the valve stem guide assembly has only a single valve stem guide such as the valve stem guide II 5 located on the upper part of the valve stem, the single valve stem guide, annular compressible material and metal hard support ring are installed in the gap formed by 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 matched with the valve stem gap. By filling the gap formed by the valve stem guide sleeve and the valve stem with the annular compressible material and the metal hard support ring, not only can the valve stem guide be supported, but it is also beneficial to prevent the fluid medium from leaking from the valve stem.

[0073] like Figure 1 As shown, when the valve stem guide assembly includes two or more valve stem guides such as the valve stem guide I 4 located in the middle of the valve stem and the valve stem guide II 5 located in the upper part of the valve stem, the two or more valve stem guides, at least one section of annular compressible material 11 and a metal hard support ring 12 for supporting and separating adjacent valve stem guides are installed in the gap formed by the valve stem guide sleeve assembly and the valve stem, the annular compressible material is tightly coated on the valve stem, and the metal hard support ring is in gap fit with the valve stem.

[0074] In the design method of the present invention, Figure 2 As shown, the valve stem guide assembly has a single valve head guide such as the valve head guide 18 located at the upper part of the valve head. The single valve head guide and the metal hard support ring are installed in the gap formed by the valve head guide sleeve and the valve head. The metal hard support ring cooperates with the valve head gap. The metal hard support ring is filled in the gap formed by the valve head guide sleeve and the valve head to support the valve head guide in the gap.

[0075] When the valve stem guide assembly includes two or more valve head guides, the two or more valve head guides are installed in the gap formed by the valve head guide sleeve assembly and the valve head, and the metal hard support ring that supports and separates adjacent valve head guides is matched with the valve head gap.

[0076] In the design method of the present invention, when the valve stem guide sleeve assembly includes two or more valve stem guide sleeves such as valve stem guide sleeve I 6 and valve stem guide sleeve II 7 located in the valve stem part, adjacent valve stem guide sleeves are connected by mechanical means such as threaded section processing at the docking position, welding connection, interference fit, etc., or are connected by connecting parts such as bolts / screws / mortise and tenon / spline / end clamping, or are connected by simultaneously connecting guide connecting blocks at the docking position.

[0077] When the valve stem guide sleeve assembly includes at least one valve stem guide sleeve and a valve head guide sleeve, such as the valve stem guide sleeve I 6 located at the valve stem part and the valve head guide sleeve I 9 located at the valve head part, the adjacent valve stem guide sleeves and valve head guide sleeves are connected by mechanical means such as threaded sections processed at the docking parts, welding, interference fit, etc., or are connected by connecting parts such as bolts / screws / mortise and tenon / spline / end clamping, or are connected by connecting guide connecting blocks at the docking parts at the same time.

[0078] When the threaded section is machined at the butt joint, the screw-in depth should be no less than 0.5*d1;

[0079] When welding is used for connection, make sure not to use intermittent welding;

[0080] When mechanical connections such as interference fit are used, the annular stress should be no greater than 10MPa. If it exceeds the above threshold, thermal stress concentration will occur at the connection between the stem guide sleeve and the valve head guide sleeve under high temperature and other operating conditions, resulting in severe deformation and affecting performance.

[0081] When bolts / screws / mortise and tenon joints / spline / end clamping are used for connection, the axial clamping force should be no less than 5MPa to prevent the structure from loosening due to insufficient clamping force, the introduction of solid-containing media due to increased gaps, and the occurrence of fractures at the connection parts under high temperature and vibration conditions;

[0082] When the guide connection block is connected at the butt joint at the same time, the inner diameter of the guide connection block is determined to be no less than 2*d1 and the height is 0.2*d1 to 5*d1.

[0083] In the design method of the present invention, the valve stem guide and the valve stem guide sleeve or the valve head guide and the valve head guide sleeve are connected by mechanical means such as processing a threaded section at the docking position, welding, interference fit, etc., or are connected by connecting parts such as bolts / screws / mortise and tenon / spline / end clamping, or are connected by simultaneously connecting a guide connecting block at the docking position or a combination of the above methods.

[0084] When the threaded section is machined at the butt joint, the screw-in depth should be no less than 0.5*d1;

[0085] When welding is used for connection, make sure not to use intermittent welding;

[0086] When mechanical connection such as interference fit is adopted, make sure that the annular surface stress is not greater than 10MPa;

[0087] When bolts / screws / mortise and tenon joints / spline joints / end clamping are used for connection, the axial clamping force shall be no less than 5MPa;

[0088] When the guide connection block is connected at the butt joint at the same time, the inner diameter of the guide connection block is determined to be no less than 2*d1 and the height is 0.2*d1 to 5*d1.

[0089] In the design method of the present invention, the material hardness of the valve stem guide assembly is less than the material hardness of the valve stem assembly.

[0090] Example

[0091] Example 1

[0092] like Figure 2 As shown, the valve includes a valve seat, a valve stem assembly, a valve body, a three-stage valve stem guide assembly and a two-stage valve stem guide sleeve assembly; wherein, the valve stem guide assembly includes a valve stem guide I 4, a valve stem guide II 5 and a valve head guide I 8, and the valve stem guide sleeve assembly includes a valve stem guide sleeve I 6 and a valve head guide sleeve I 9; assuming that the maximum diameter of the valve stem is d1 (40 mm), the maximum diameter of the valve head is d2 (80 mm) and the stroke M of the valve stem assembly 2 is greater than 2*d1 (90 mm), the outer diameter D1 of the valve stem guides I~II is 1.75*d1 (70 mm), the outer diameter D2 of the valve head guide I is 1.5*d2 (120 mm), the outer diameter D3 of the valve stem guide sleeve I is 2*D1 (140 mm), and the outer diameter D4 of the valve head guide sleeve I is 1.2*D2 (144 mm). The length of valve stem guide I is H11=3*d1(120mm), the length of valve stem guide II is H12=2*d1(80mm), and the length of valve head guide I is H13=3*d1(120mm); the length of valve stem guide sleeve I is H21=10*d1(400mm), and the length of valve head guide sleeve I is H23=10*d1(400mm); the valve stem guide sleeve I and the valve head guide sleeve I are connected by threads and welding, and the thread screw-in depth is 1.2d1 (48mm); the valve stem guide I and the valve stem guide sleeve I are connected by interference fit, and the annular surface stress is less than 5MPa; the valve stem guide II and the valve stem guide sleeve I are connected by interference fit, and the annular surface stress is less than 6MPa; the valve head guide I and the valve head guide sleeve I are connected as one piece.

[0093] At room temperature, the valve was tested for no-load operation 500 times without any sticking. In a mud solution filled with 5% solid content, the valve was tested for operation 500 times without any sticking.

[0094] Example 2

[0095] like Figure 3As shown, the valve includes a valve seat, a valve stem assembly, a valve body, a three-section valve stem guide assembly and a three-section valve stem guide sleeve assembly; wherein, the valve stem guide assembly includes a valve stem guide I, a valve stem guide II and a valve head guide I, and the valve stem guide sleeve assembly includes a valve stem guide sleeve I, a valve stem guide sleeve II and a valve head guide sleeve I; assuming that the maximum diameter of the valve stem is d1 (40 mm), the maximum diameter of the valve head is d2 (80 mm) and the stroke M of the valve stem assembly 2 is greater than 2*d1 (90 mm), the outer diameter D1 of the valve stem guides I~II is 1.75*d1 (70 mm), and the outer diameter D2 of the valve head guide I is 1.5*d2 (120 mm); the outer diameter D3 of the valve stem guide sleeves I~II is 2*D1 (140 mm), and the outer diameter D4 of the valve head guide sleeve I is 1.2*D2 (144 mm). The length of valve stem guide I is H11=3*d1, the length of valve stem guide II is H12=2*d1, and the length of valve head guide I is H13=3*d1; the length of valve stem guide sleeve I is H21=6*d1, the length of valve stem guide sleeve II is H22=3*d1, and the length of valve head guide sleeve I is H23=10*d1; the valve stem guide sleeve I and the valve stem guide sleeve II are connected by threads and welding, and the thread screw-in depth is 1.2*d1; the valve stem guide sleeve II and the valve head guide sleeve I are connected by splines and welding, and the splines are evenly distributed with 8 teeth, and the splines are welded after matching; the valve stem guide I and the valve stem guide sleeve I are connected by interference fit, and the annular surface stress is less than 5MPa; the valve stem guide II and the valve stem guide sleeve II are connected by interference fit, and the annular surface stress is less than 6MPa; the valve head guide I and the valve head guide sleeve I are connected as one piece.

[0096] At room temperature, the valve was tested for no-load operation 500 times without any sticking. In a mud solution filled with 5% solid content, the valve was tested for operation 500 times without any sticking.

[0097] The present invention is described in detail above in conjunction with specific implementation methods and exemplary examples, but these descriptions cannot be understood as limiting the present invention. Those skilled in the art understand that, without departing from the spirit and scope of the present invention, various equivalent substitutions, modifications or improvements can be made to the technical solution of the present invention and its implementation methods, all of which fall within the scope of the present invention. The protection scope of the present invention shall be subject to the attached claims.

[0098] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. An angle valve, characterized in that: The invention comprises a valve seat, a valve stem assembly, a valve body, a valve stem guide assembly and a valve stem guide sleeve assembly, wherein the valve seat is arranged at the lower part of the valve body, and the outer wall cooperates with the inner wall of the outlet section of the valve body to guide the medium out of the valve body; the valve stem assembly comprises a valve stem and a valve head connected as one body, wherein the valve head extends into the valve body inwardly, and controls the flow rate of the medium at the outlet of the valve body through reciprocating linear motion in the valve body; the valve stem guide assembly has 1 to 6 sections of valve stem guide, or 1 to 6 sections of valve stem guide and valve head guide in total, wherein the valve stem guide is arranged at the valve The valve head guide is arranged outside the valve head for guiding the valve stem assembly when it reciprocates; the valve stem guide sleeve assembly is fixed in the valve body through the valve cover flange, and has 1 to 5 sections of valve stem guide sleeves, or 1 to 5 sections of valve stem guide sleeves and valve head guide sleeves, wherein the valve stem guide sleeve and the valve head guide sleeve are respectively sleeved outside the valve stem guide and the valve head guide, and at least one section of the valve stem guide is connected to the valve stem guide sleeve as a whole, and when there is a valve head guide and a valve head guide sleeve, at least one section of the valve head guide is connected to the valve head guide sleeve as a whole; The maximum diameter of the valve stem is d1, the maximum diameter of the valve head is d2, the outer diameter D1 of the valve stem guide is (1.1-3)*d1, the outer diameter D2 of the valve head guide is (1.1-3)*d2, the outer diameter D3 of the valve stem guide sleeve is (1.1-3)*D1, and the outer diameter D4 of the valve head guide sleeve is (1.1-3)*D2; the length H1 of a single-section valve stem guide or valve head guide in the valve stem guide assembly is 0.2*d1-20*d1; the length H2 of a single-section valve stem guide sleeve or valve head guide sleeve in the valve stem guide sleeve assembly is 0.1*d1-40*d1; The relationship between the stroke and segmentation of the valve stem assembly includes: when the stroke of the valve stem assembly is M≤1*d1, the number of the valve stem guides is 1 to 2 segments, and the number of the valve head guides is 0 to 1 segment; when the stroke of the valve stem assembly is 1*d1<M≤2*d1, the number of the valve stem guides is 2 to 3 segments, and the number of the valve head guides is 1 to 2 segments; when the stroke of the valve stem assembly is M>2*d1, the number of the valve stem guides is 3 segments or more, and the number of the valve head guides is 1 to 3 segments; The relationship between the length and segmentation of the valve stem guide sleeve assembly includes: when the total length of the valve stem guide sleeve assembly is H≤3*d1, the number of the valve stem guide sleeves is 1 segment, and the number of the valve head guide sleeves is 0 segment; when the total length of the valve stem guide sleeve assembly is 3*d1<H≤10*d1, the number of the valve stem guide sleeves is 1 to 2 segments, and the number of the valve head guide sleeves is 0 to 1 segment; when the total length of the valve stem guide sleeve assembly is H>10*d1, the number of the valve stem guide sleeves is 2 to 4 segments, and the number of the valve head guide sleeves is 0 to 1 segment.

2. The angle valve according to claim 1, characterized in that: When the valve stem guide assembly has only a single valve stem guide, the single valve stem guide, an annular compressible material and a metal hard support ring are installed in the gap formed by the valve stem guide sleeve and the valve stem, the annular compressible material is tightly coated on the valve stem, and the metal hard support ring is in clearance with the valve stem; When the valve stem guide assembly includes two or more valve stem guides, the two or more valve stem guides, at least one section of annular compressible material and a metal hard support ring for supporting and separating adjacent valve stem guides are installed in the gap formed by the valve stem guide sleeve assembly and the valve stem. The annular compressible material is tightly wrapped on the valve stem, and the metal hard support ring is matched with the valve stem gap.

3. The angle valve according to claim 1, characterized in that: 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 the gap formed by the valve head guide sleeve and the valve head, and the metal hard support ring cooperates with the valve head gap. The metal hard support ring fills the gap formed by the valve head guide sleeve and the valve head to support the valve head guide in the gap; and / or When the valve stem guide assembly includes two or more valve head guides, the gap formed by the valve head guide sleeve assembly and the valve head is installed with the two or more valve head guides, and the metal hard support rings that support and separate adjacent valve head guides are matched with the valve head gap.

4. The angle valve according to claim 1, characterized in that: When the valve stem guide sleeve assembly includes two or more valve stem guide sleeves, adjacent valve stem guide sleeves are connected by machining threaded sections at the butt joint, welding, interference fit, or connected by bolts / screws / mortise and tenon / spline connectors, or by connecting guide connection blocks at the butt joint; and / or When the valve stem guide sleeve assembly includes at least one valve stem guide sleeve and a valve head guide sleeve, the adjacent valve stem guide sleeves and valve head guide sleeves are connected by mechanical means such as machining threaded sections at the butt joint, welding, or interference fit, or are connected by means of bolt / screw / mortise and tenon / spline connectors, or are connected by simultaneously connecting guide connection blocks at the butt joint.

5. The angle valve according to claim 1, characterized in that: When the valve stem guide sleeves or the valve stem guide sleeve and the valve head guide sleeve are connected by threaded sections machined at the butt joints, the screw-in depth is not less than 0.5*d1; and / or When the valve stem guide sleeves or the valve stem guide sleeve and the valve head guide sleeve are connected by welding, intermittent welding is not allowed; and / or When the valve stem guide sleeves or the valve stem guide sleeve and the valve head guide sleeve are connected mechanically by interference fit, the annular surface stress is not greater than 10 MPa; and / or When the valve stem guide sleeves or the valve stem guide sleeve and the valve head guide sleeve are connected by bolts / screws / mortise and tenon / spline connectors, the axial clamping force is not less than 5MPa; and / or When the valve stem guide sleeves or the valve stem guide sleeve and the valve head guide sleeve are connected by simultaneously connecting the guide connection block at the butt joint, the inner diameter of the guide connection block is not less than 2*d1 and the height is 0.2*d1 to 5*d1.

6. The angle valve according to claim 1, characterized in that: The material hardness of the valve stem guide assembly is less than the material hardness of the valve stem assembly.

7. A design method for an angle valve, characterized in that: The angle valve comprises a valve seat, a valve stem assembly, a valve body, a valve stem guide assembly and a valve stem guide sleeve assembly. The valve seat is arranged at the lower part of the valve body, and the outer wall cooperates with the inner wall of the valve body outlet section to guide the medium out of the valve body; the valve stem assembly comprises a valve stem and a valve head connected as one body, which extends into the valve body with the valve head facing inward, and controls the flow rate of the medium at the valve body outlet through reciprocating linear motion in the valve body; the design method comprises: The valve stem guide assembly is designed to have 1 to 6 sections of valve stem guides, or 1 to 6 sections of valve stem guides and valve head guides, wherein the valve stem guide is arranged outside the valve stem, and the valve head guide is arranged outside the valve head, for guiding the valve stem assembly when it reciprocates; the valve stem guide sleeve assembly is fixed to the valve body through the valve cover flange, and the valve stem guide sleeve assembly is designed to have 1 to 5 sections of valve stem guide sleeves, or 1 to 5 sections of valve stem guide sleeves and valve head guide sleeves, wherein the valve stem guide sleeve and the valve head guide sleeve are respectively sleeved outside the valve stem guide and the valve head guide, and at least one section of the valve stem guide is connected to the valve stem guide sleeve as a whole, and when there is a valve head guide and a valve head guide sleeve, at least one section of the valve head guide is connected to the valve head guide sleeve as a whole; The maximum diameter of the valve stem is d1, the maximum diameter of the valve head is d2, the outer diameter D1 of the valve stem guide is determined to be (1.1-3)*d1, the outer diameter D2 of the valve head guide is determined to be (1.1-3)*d2, the outer diameter D3 of the valve stem guide sleeve is determined to be (1.1-3)*D1, and the outer diameter D4 of the valve head guide sleeve is determined to be (1.1-3)*D2; the length H1 of a single-section valve stem guide or valve head guide in the valve stem guide assembly is determined to be 0.2*d1-20*d1, and the length H2 of a single-section valve stem guide sleeve or valve head guide sleeve in the valve stem guide sleeve assembly is determined to be 0.1*d1-40*d1; Determine the relationship between the stroke and segmentation of the valve stem assembly: when the stroke of the valve stem assembly is M≤1*d1, the number of the valve stem guides is 1 to 2 segments, and the number of the valve head guides is 0 to 1 segment; when the stroke of the valve stem assembly is 1*d1<M≤2*d1, the number of the valve stem guides is 2 to 3 segments, and the number of the valve head guides is 1 to 2 segments; when the stroke of the valve stem assembly is M>2*d1, the number of the valve stem guides is 3 segments or more, and the number of the valve head guides is 1 to 3 segments; Determine the relationship between the length and segmentation of the valve stem guide sleeve assembly: when the total length of the valve stem guide sleeve assembly is H≤3*d1, the number of the valve stem guide sleeves is 1 segment, and the number of the valve head guide sleeves is 0 segment; when the total length of the valve stem guide sleeve assembly is 3*d1<H≤10*d1, the number of the valve stem guide sleeves is 1 to 2 segments, and the number of the valve head guide sleeves is 0 to 1 segment; when the total length of the valve stem guide sleeve assembly is H>10*d1, the number of the valve stem guide sleeves is 2 to 4 segments, and the number of the valve head guide sleeves is 0 to 1 segment.

8. The design method according to claim 7, characterized in that: When the valve stem guide assembly has only a single valve stem guide, the single valve stem guide, an annular compressible material and a metal hard support ring are installed in the gap formed by the valve stem guide sleeve and the valve stem, the annular compressible material is tightly coated on the valve stem, and the metal hard support ring is in clearance with the valve stem; When the valve stem guide assembly includes two or more valve stem guides, the two or more valve stem guides, at least one section of annular compressible material and a metal hard support ring for supporting and separating adjacent valve stem guides are installed in the gap formed by the valve stem guide sleeve assembly and the valve stem. The annular compressible material is tightly wrapped on the valve stem, and the metal hard support ring is in clearance with the valve stem.

9. The design method according to claim 7, characterized in that: When the valve stem guide assembly has a single valve head guide, the single valve head guide and the metal hard support ring are installed in the gap formed by the valve head guide sleeve and the valve head, the metal hard support ring is matched with the valve head gap, and the metal hard support ring is filled in the gap formed by the valve head guide sleeve and the valve head to support the valve head guide in the gap; and / or When the valve stem guide assembly includes two or more valve head guides, the two or more valve head guides are installed in the gap formed by the valve head guide sleeve assembly and the valve head, and the metal hard support ring that supports and separates adjacent valve head guides is matched with the valve head gap.

10. The design method according to claim 7, characterized in that: When the valve stem guide sleeve assembly includes two or more valve stem guide sleeves, adjacent valve stem guide sleeves are connected by machining threaded sections at the butt joint, welding, interference fit, or connected by bolts / screws / mortise and tenon / spline connectors, or by connecting guide connection blocks at the butt joint; and / or When the valve stem guide sleeve assembly includes at least one valve stem guide sleeve and a valve head guide sleeve, the adjacent valve stem guide sleeves and valve head guide sleeves are connected by mechanical means such as machining threaded sections at the butt joint, welding, or interference fit, or are connected by means of bolt / screw / mortise and tenon / spline connectors, or are connected by simultaneously connecting guide connection blocks at the butt joint.

11. The design method according to claim 7, characterized in that: When the valve stem guide sleeves or the valve stem guide sleeve and the valve head guide sleeve are connected by processing threaded sections at the butt joints, the screw-in depth is determined to be not less than 0.5*d1; and / or When the valve stem guide sleeves or the valve stem guide sleeve and the valve head guide sleeve are connected by welding, intermittent welding is not used; and / or When the valve stem guide sleeves or the valve stem guide sleeve and the valve head guide sleeve are connected mechanically by interference fit, the annular surface stress is determined to be no greater than 10 MPa; and / or When the valve stem guide sleeves or the valve stem guide sleeve and the valve head guide sleeve are connected by bolts / screws / mortise and tenon / spline connectors, the axial clamping force is determined to be no less than 5MPa; and / or When the valve stem guide sleeves or the valve stem guide sleeve and the valve head guide sleeve are connected by simultaneously connecting the guide connection block at the butt joint, the inner diameter of the guide connection block is determined to be no less than 2*d1 and the height is 0.2*d1 to 5*d1.

Images