CN113280170A - Built-in three-way integral ball valve and preparation method thereof - Google Patents
Built-in three-way integral ball valve and preparation method thereof Download PDFInfo
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- CN113280170A CN113280170A CN202110791103.4A CN202110791103A CN113280170A CN 113280170 A CN113280170 A CN 113280170A CN 202110791103 A CN202110791103 A CN 202110791103A CN 113280170 A CN113280170 A CN 113280170A
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- 238000002360 preparation method Methods 0.000 title abstract description 5
- 238000003466 welding Methods 0.000 claims abstract description 42
- 238000010622 cold drawing Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 238000007906 compression Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 4
- 239000010959 steel Substances 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 22
- 230000000712 assembly Effects 0.000 claims description 10
- 238000000429 assembly Methods 0.000 claims description 10
- 238000003754 machining Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000007142 ring opening reaction Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000000641 cold extrusion Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
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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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
- F16K11/087—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with spherical plug
- F16K11/0873—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with spherical plug the plug being only rotatable around one spindle
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Abstract
The invention relates to an integral ball valve with an internal three-way valve and a preparation method thereof. The valve body of the ball valve is an integrally formed valve body and comprises a left connecting pipe, a right connecting pipe and a branch connecting pipe, a vertical valve rod sleeve or a valve rod sleeve interface in a vertical pipe orifice shape is arranged at the top of the valve body, the valve rod sleeve interface is connected with a valve rod sleeve in an inserting mode, and the valve rod sleeve interface are welded together. The manufacturing method comprises the steps of using a straight-through seamless steel pipe as a workpiece, adopting a liquid bulging cold-drawing process to cold-draw a branch pipe and a top pipe, placing a ball body of a valve and each side valve seat component in the cold-drawn workpiece, adopting an internal expansion fixture to position each side valve seat component and the ball body, and compressing a left side pipe, a right side pipe and the branch pipe into a left connecting pipe, a right connecting pipe and a branch connecting pipe through a cold compression process. The ball valve has the advantages that the number of welding seams on the valve body is small, the welding difficulty is small, the quality problem caused by the welding seams is favorably reduced or avoided, the valve quality is improved, and the stability and the consistency of opening and closing torque are ensured.
Description
Technical Field
The invention relates to an integral ball valve of an internal three-way valve and a preparation method thereof, wherein the integral ball valve of the internal three-way valve can be used as a large-caliber ball valve and other ball valves of a heating system.
Background
The valve body of the three-way welded ball valve of the existing heating system is welded by 5 parts, and comprises a main valve body (or simply called valve body), a left connecting pipe, a right connecting pipe, a branch connecting pipe and a valve rod sleeve, wherein the left connecting pipe, the right connecting pipe and the branch connecting pipe can be collectively called connecting pipes (or side pipes), the facility orientations of the left connecting pipe, the right connecting pipe and the branch connecting pipe are respectively welded on ports on the corresponding sides of the main valve body according to specific valve requirements, usually, the left connecting pipe and the right connecting pipe are coaxially arranged in a straight-through direction, the axis of the branch connecting pipe is perpendicular to the straight-through direction, the valve rod sleeve is welded on a top port of the main valve body and is used for penetrating a valve rod, a sealing is arranged between the valve rod and the valve rod sleeve, the valve body of the three welded three-ring V-shaped welding seams (the welding seams of the three connecting pipes and the main valve body) and a horizontal intersecting line fillet welding seam (the welding seam of the valve rod sleeve and the main valve body), the welding difficulty is high, the defects of uneven welding seams or leakage of the welding seams and the like are easy to occur, the maintenance difficulty is high, the cost is high, and the time consumption is long. In addition, the process difficulty during assembly welding is high, the concentricity of the sealing surfaces of the valve seats at the two ends is difficult to guarantee, after welding is finished, the opening and closing torque of the ball valve is unstable, the quality of the valve is influenced, and meanwhile, the manufacturing cost is also high.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the built-in three-way integral ball valve and the preparation method thereof, the number of welding seams on the valve body of the ball valve is small, the welding difficulty is small, the quality problem caused by the welding seams is favorably reduced or avoided, the valve quality is improved, and the stability and the consistency of opening and closing torque are ensured.
The technical scheme for realizing the aim of the invention is as follows:
the integral ball valve comprises a valve body, wherein the valve body is an integrally formed valve body and comprises a left connecting pipe, a right connecting pipe and a branch connecting pipe, a vertical valve rod sleeve or a valve rod sleeve connector in a vertical pipe orifice shape is arranged at the top of the valve body, the valve rod sleeve is inserted into the valve rod sleeve connector, and the valve rod sleeve connector are welded together.
Preferably, a ball used as an opening and closing member and each side valve seat assembly matched with the ball are arranged in the valve body, each valve seat assembly comprises a valve seat support ring and a valve seat arranged on the axial inner side of the corresponding valve seat support ring, a sealing surface capable of forming valve sealing with the spherical surface of the ball is arranged on each valve seat, a positioning conical surface attached to the inner surface of the valve body is arranged on the radial outer side of each valve seat support ring, and the inner surface attached to the positioning conical surface on each valve seat support ring is also in a conical shape.
Preferably, an annular disc spring is arranged between the valve seat and the valve seat support ring.
Preferably, the valve seat is provided with a fire collar.
Preferably, the taper of the positioning conical surface on the valve seat support ring is 30-60 degrees.
Preferably, the welding mode between the valve rod sleeve and the valve rod sleeve opening is exposed horizontal circular ring angle welding, and corresponding sealing continuous welding is carried out from the outside.
Preferably, the top of the valve rod is connected with a driving device, and the driving device is a hand wheel or an electric driving device.
The invention discloses a method for preparing an integral ball valve with an internal three-way, which is any one of the integral ball valves with the internal three-way, the straight-through seamless steel pipe is taken as a workpiece, a liquid expansion cold-drawing process is adopted to cold-draw the branch pipe and the jacking pipe, the ball body of the valve and the valve seat components on each side are arranged in the cold-drawn workpiece, wherein the ball body is positioned in a cavity where four pipes in the workpiece meet, the valve seat assemblies on each side are respectively positioned on the left side, the right side and the branch pipe side of the ball body, an internal expansion fixture is adopted to position the valve seat assemblies on each side and the ball body, and the left side pipe, the right side pipe and the branch pipe are compressed into a left connecting pipe, a right connecting pipe and a branch connecting pipe through a cold compression process, and the positioning conical surface of each valve seat support ring in each valve seat assembly is attached to the inner surfaces of the conical reducing parts of the left connecting pipe, the right connecting pipe and the branch connecting pipe to form conical positioning between the valve body and the valve seat support ring.
Preferably, in the process of cold-drawing the branch pipe and the top pipe by adopting a liquid expansion cold-drawing process, the branch pipe is firstly cold-drawn, and then the top pipe is cold-drawn.
Preferably, after the branch pipe and the top pipe are cold drawn, the top pipe formed by cold drawing is machined to meet the requirements of the valve rod sleeve or the valve rod socket to form the valve rod sleeve or the valve rod socket.
Preferably, before the ball body is installed, each part of the valve rod assembly which needs to be installed from the inner end of the through hole of the valve rod sleeve is placed into the workpiece from the pipe orifice with the larger caliber and is installed in place, and then the ball body is placed into the workpiece from the pipe orifice with the larger caliber and is installed in place.
Preferably, when the valve seat assembly is assembled, the inner expansion fixture is adopted for axial positioning of the ball body and the valve seat assembly, and the inner expansion fixture is taken out after cold compression.
Preferably, the internal expansion fixture comprises a mandrel, a main body of the mandrel is cylindrical, an external thread for screwing a nut is arranged on the axial outer side of the mandrel, a frustum-shaped expansion part is arranged on the axial inner side of the mandrel, an expansion body and a positioning sleeve are sleeved on the mandrel and screwed with the nut, the expansion body, the positioning sleeve and the nut are sequentially distributed along the axial direction of the mandrel from inside to outside, the expansion body is in a horizontal cup shape, the axis of the expansion body is the same as the axis of the mandrel, the cup bottom faces outwards and is provided with an axial through hole sleeved on the mandrel, the cup wall of the expansion body is in a multi-piece design, the inner surface of the expansion body is in a frustum shape matched with the expansion part, and the outer surface of the expansion body is in a cylindrical shape.
Preferably, an annular groove is formed in the radial inner wall of the valve seat support ring, a stepped annular notch corresponding to the annular groove in the valve seat support ring is formed in the axial front end of the positioning sleeve, and a plurality of open rings are arranged between the annular groove of the valve seat support ring and the stepped annular notch of the positioning sleeve.
The valve seat assembly comprises a valve seat assembly, a ball body, a valve body support ring, a valve seat, a plurality of ring-opening rings, a plurality of valve body support rings and a plurality of disc springs, wherein the valve body support ring is arranged on the valve body support ring, the valve body support ring is connected with the valve seat support ring through a plurality of ring-opening rings, the valve body support ring is connected with the valve body support ring through a plurality of ring-opening rings, the disc springs are arranged on the valve body support ring, and the disc springs are arranged on the valve body support ring.
The invention has the beneficial effects that: because the cold drawing/extrusion mode is adopted to integrally form the integral valve body comprising the connecting pipes at all sides, the vertical circular ring V-shaped welding line between the connecting pipes at all sides and the main valve body in the original valve body is eliminated, meanwhile, the connecting structure between the top of the valve body and the valve rod sleeve is changed into a vertical straight pipe structure from the original curved surface structure, the valve rod sleeve is inserted into the straight pipe structure, the welding mode is changed from the original horizontal intersecting line fillet welding into the horizontal circular ring fillet welding, the welding difficulty is obviously reduced, the welding quality is favorably ensured, even the cold drawing/extrusion mode can be adopted to manufacture the valve rod sleeve structure, and the welding line between the valve rod sleeve and the valve body is further cancelled. Because the welding seams are reduced or even cancelled, the welding difficulty is obviously reduced when a small amount of welding seams are left, so that the welding quality risk is obviously reduced, and the manufacturing cost and the maintenance cost are favorably reduced; because the conical surface is adopted between the support ring and the valve body for positioning, the positioning precision is improved, the positioning difficulty is reduced, and the positioning quality is kept stable; because the internal expansion fixture (the internal expansion has a clamping mechanism mandrel) is adopted to fix the ball body and each valve seat in the cold compression process of the connecting pipe part, the positioning is accurate and firm, the ball body has certain sealing specific pressure, and the opening and closing moments of each ball valve are basically the same.
The ball valve of the invention can be used as a large-caliber ball valve of a heating system and can also be used as a ball valve for other purposes.
Drawings
FIG. 1 is a schematic sectional view of the ball valve of the present invention in a front view;
FIG. 2 is a schematic view of a cross-sectional configuration of the ball valve of the present invention in a top view;
FIG. 3 is a schematic sectional view of the inner expanding clamp and its fixing manner of the ball and the valve seat according to the present invention;
fig. 4 is a schematic sectional view of the internal expansion jig according to the present invention.
Detailed Description
Referring to fig. 1-4, the built-in three-way integral ball valve comprises an integrally formed valve body 10, wherein the integrally formed valve body comprises a left connecting pipe 11, a right connecting pipe 12 and a branch connecting pipe 13, a vertical valve rod sleeve or a valve rod sleeve interface 15 in a vertical pipe orifice shape is arranged at the top of the valve body, a valve rod sleeve 14 is inserted on the valve rod sleeve interface, the valve rod sleeve and the valve rod sleeve interface are welded together, and a welded welding seam 43 is a horizontal circular fillet welding seam due to the adoption of the insertion of a tubular structure. Therefore, the left connecting pipe, the right connecting pipe and the branch connecting pipe are one part of the integrally formed valve body, no welding seam is formed between the left connecting pipe, the right connecting pipe and the branch connecting pipe, when a vertical valve rod sleeve is arranged at the top of the valve body, the valve rod sleeve is also one part of the integrally formed valve body, no welding seam is formed between the valve rod sleeve and the other part of the integrally formed valve body, when a vertical pipe mouth-shaped valve rod sleeve opening is arranged at the top of the valve body, the valve rod sleeve opening is one part of the integrally formed valve body, no welding seam is formed between the valve rod sleeve opening and the other part of the integrally formed valve body, the valve rod sleeve is inserted into the valve rod sleeve opening, sealing welding between the left connecting pipe and the right connecting pipe can be achieved through a horizontal circular ring angle welding mode, and horizontal intersecting line angle welding with large difficulty is avoided (see fig..
The valve rod sleeve opening or the valve rod sleeve on the integrally formed valve body is connected with other parts of the valve body through the smooth transition curved surface so as to adapt to the characteristics of a cold drawing process, reduce the process difficulty, and contribute to optimizing internal medium flow organization and reducing resistance.
Generally, the pipe diameters of the left connecting pipe and the right connecting pipe are the same, and the pipe diameters of the branch connecting pipes are set according to actual requirements, and are generally the same as or different from those of the left connecting pipe and the right connecting pipe.
The axes of the left connecting pipe and the right connecting pipe are generally positioned on the same straight line (the left connecting pipe and the right connecting pipe are coaxial), and the left connecting pipe and the right connecting pipe are generally in a mirror symmetry (or 180-degree rotation symmetry) structure, and correspondingly, the left valve seat assembly and the right valve seat assembly are in a coaxial and mirror symmetry structure.
The valve seat assembly mainly comprises a valve seat 32 and a valve seat support ring 31, and in a preferred embodiment, further comprises a disc spring 35 positioned between the valve seat and the valve seat support ring and a fire collar 36 of the valve seat, wherein the fire collar is L-shaped in cross section and shields the axial rear side of the valve seat and the axial outer side part area of the radial inner surface. When a valve seat fire collar is provided, the disc spring is preferably located between the valve seat fire collar and the valve seat support ring. Through the thrust effect of dish spring, help keeping the sealing force between disk seat and the spheroid, and help the rigidity when the ball valve assembly.
The axis of the branch connection pipe is perpendicular to the axes of the left connection pipe and the right connection pipe, and when the branch connection pipe has the same diameter as the left connection pipe and the right connection pipe, the branch connection pipe (and the branch side valve seat assembly) and the left connection pipe (and the left side valve seat assembly) and the right connection pipe (and the right side valve seat assembly) adopt a rotational symmetry structure (see fig. 2).
Because the valve body is of an integrally formed structure, compared with the existing valve body formed by welding the main valve body and the side connecting pipes, no physical boundary line exists between the side connecting pipes and the main valve body, but for convenience in expression, all parts of the valve body are still expressed by terms of the main valve body, the side connecting pipes and the like.
The valve body is internally provided with a ball 20 serving as an opening and closing part and valve seat assemblies (corresponding to the valve seat assemblies of the left connecting pipe, the right connecting pipe and the branch connecting pipe respectively) 30 on all sides matched with the ball, each valve seat assembly comprises a valve seat support ring 31 and a valve seat 32 arranged on the axial inner side of the corresponding valve seat support ring, a sealing surface capable of forming valve seal with the spherical surface of the ball is arranged on the valve seat, and the valve seat can be a soft valve seat generally. The radial outer side of the valve seat support ring is provided with a positioning conical surface (conical table surface, curved surface with conical table side surface shape) 18 attached to the inner surface of the valve body, correspondingly, the inner surface attached to the positioning conical surface of the valve seat support ring on the valve seat is also in a conical surface shape with the same taper, the axis of the positioning conical surface and the axis of the corresponding valve seat are positioned on the same straight line, the straight line is perpendicularly intersected with the axis of the valve rod 41, the intersection point is the spherical center of a sphere, the conical surface positioning formed by the method is beneficial to reducing the positioning process difficulty, the positioning precision of the valve seat support ring is improved, the coaxiality of the left valve seat and the right valve seat and the concentricity of the sealing surface of each valve seat and the spherical surface of the sphere are further ensured and improved, and the stability and consistency of the opening and closing torque of the ball valve are ensured.
The taper (included angle between a generatrix and an axis in a conical surface) of the surface, which is attached to the inner surface of the valve body, of the radial outer side surface of the valve seat support ring is about 45 degrees, for example, 30-60 degrees, and usually has certain axial length (for example, 1/4-1/2 of the radius of a sphere) so as to be beneficial to process implementation and ensure positioning precision and stability, corresponding conical surfaces on the outer side of the valve group support ring are completely attached to corresponding inner parts of the valve body, and the coverage range of the corresponding conical surfaces on the inner wall of the valve body can be generally larger than the actual attachment area after assembly, so that the assembly operation is convenient.
According to actual needs, an O-shaped ring for sealing can be arranged between the positioning conical surface of the valve seat support ring and the corresponding inner surface of the valve body, and an annular groove for embedding the O-shaped ring can be arranged on the positioning conical surface.
The welding mode between the valve rod sleeve and the valve rod sleeve opening is horizontal circular ring angle welding, and is sealing continuous welding implemented from the outside.
The built-in three-way integral ball valve can be prepared by any one of the manufacturing methods of the built-in three-way integral ball valve disclosed by the invention.
The method for manufacturing the built-in three-way integral ball valve can be used for manufacturing any built-in three-way integral ball valve disclosed by the invention, a straight-through seamless steel pipe is taken as a workpiece, a liquid bulging cold-drawing process (such as a hydraulic bulging process) is adopted to cold-draw a branch pipe and a push pipe, a ball body of the valve and each side valve seat component are arranged in the workpiece after cold-drawing, wherein the ball body is positioned in a cavity formed by four pipes (a left pipe, a right pipe, the branch pipe and the push pipe) in the workpiece, each side valve seat component is respectively positioned at the left side, the right side and the branch pipe side of the ball body, an internal expansion clamp is adopted to position each side valve seat component and the ball body, the left pipe, the right pipe and the branch pipe are compressed into the left connecting pipe, the right connecting pipe and the branch connecting pipe through a cold compression process, the positioning conical surfaces of each valve seat support ring in each valve seat component and the inner surfaces of conical reducing parts (transition parts from the body parts to corresponding pipe orifices) of the left connecting pipe, the right connecting pipe and the branch connecting pipe joints are formed by the positioning conical reducing conical surfaces of each valve seat support ring in each valve seat component And fitting to form conical positioning between the valve body and the valve seat support ring.
In the process of cold-drawing the branch pipe and the top pipe by adopting a liquid bulging cold-drawing process, the branch pipe is firstly cold-drawn, and then the top pipe is cold-drawn. The branch pipe is usually thicker (usually equal in diameter to the left side pipe and the right side pipe after cold drawing) and longer, the required axial compensation amount is relatively larger, the cold drawing of the branch pipe firstly helps to reduce the process difficulty and ensure the quality, and the top pipe is used as a blank body of a valve rod sleeve or a valve rod sleeve opening, and the size of the top pipe meets the processing requirement of the valve rod sleeve or the valve rod sleeve opening.
After the branch pipe and the push pipe are cold-drawn, machining can be performed on the push pipe formed by cold drawing (which can be called a push pipe blank) to enable the push pipe to meet the requirements of a valve rod sleeve or a valve rod socket to form the valve rod sleeve or the valve rod socket, and the machining can be performed according to actual requirements, such as dimension machining (for example, redundant parts are ground off) and construction machining (for example, machining of an annular step structure and inner diameter change of the inner wall of the through hole in a turning and milling mode and specific constructions such as chamfers or threads required by drawings) and the like.
Before the ball is assembled, each part (for example, a flat square 42 for connecting with the ball or a valve rod provided with the flat square, a gasket positioned at the diameter expansion part of the inner end of the through hole, a part or all of related sealing parts needing to be assembled from the valve body, and the like) in the valve rod assembly 40 which needs to be assembled from the inner end of the through hole of the valve rod sleeve can be placed into the workpiece from a pipe orifice with a larger caliber (for example, a pipe orifice of a left pipe, a pipe orifice of a right pipe or a pipe orifice of a branch pipe) and is assembled in place, and then the ball is placed into the workpiece from the pipe orifice with the larger caliber and is assembled in place. The valve rod assembly mainly comprises a valve rod and a part for realizing rotary connection and sealing between the valve rod and a valve rod sleeve, such as a packing 45, a packing box, a packing gland, an O-shaped ring embedded on the valve rod for realizing sealing, a gasket between a flat square at the lower end of the valve rod and an inner end diameter-expanding port of the valve rod sleeve or a valve rod sleeve interface and the like, and the upper end of the valve rod (positioned above the outside of the valve rod) can be provided with a driving device such as a hand wheel 49 and the like.
When the ball is installed, the connection between the ball and the ball connecting structure (such as a flat square structure) at the lower end of the valve body is realized at the same time. Usually, peg graft through "flat square" form grafting/joint structure (can be called flat square usually) between valve rod lower extreme and the spheroid, under this situation, can align the grafting structure at grafting structure and the spheroid top of valve rod lower extreme when inserting the spheroid, the spheroid translation back that targets in place, the flat square "of valve rod lower extreme slides in" the flat square draw-in groove at spheroid top, realizes the joint between the two.
The installation sequence of each piece can be determined according to the size and the position of each piece, because each side pipe (the left side pipe, the right side pipe and the branch pipe are collectively called) on the workpiece after cold drawing is generally equal in diameter (the workpiece middle cavity is a space formed by extension/intersection of each side pipe hole), the piece (such as any piece and a ball in a valve rod assembly) needing to be installed from the inside of the workpiece can be placed into the workpiece from any side pipe orifice, and after the ball is installed in place, the ball is placed into each side valve seat assembly from each side pipe orifice.
When the valve seat assembly is assembled, the inner expansion fixture is adopted to axially position the ball body and the valve seat assembly.
Sealing rings (e.g., O-rings), gaskets, and other attachments or other configurations may be provided as desired.
The necessary machining can be carried out on the workpiece after cold drawing or cold compression according to actual requirements, and the detailed construction (if any), the dimensional requirement, the surface precision and the like can be completed.
The seal between the valve stem and the valve stem sleeve (or the valve stem sleeve and the valve stem sleeve interface) according to the prior art can be provided with a stuffing box and stuffing to realize rotary seal, and a stuffing gland is arranged on the stuffing to compact the stuffing and keep the stuffing in a proper seal.
Can set up at the top of valve rod cover and be used for spacing breach column structure, set up spacer pin 48 on the valve rod, the outer end of spacer pin extends in breach column structure, through the rotation range of breach column structure restriction spacer pin, and then the rotation range of restriction valve rod.
Referring to fig. 3 and 4, the internal expansion fixture includes a mandrel 61, a main body of the mandrel is cylindrical, an external thread for screwing a nut is arranged on an axial outer side of the mandrel, a frustum-shaped expansion portion 66 is arranged on an axial inner side of the mandrel, an expansion body 65 and a positioning sleeve 63 are sleeved on the mandrel, a nut 62 is screwed on the mandrel, the expansion body, the positioning sleeve and the nut are sequentially distributed along an axial direction of the mandrel from inside to outside, the expansion body is in a horizontal cup shape and can be regarded as including an integrated cup bottom and a cup wall, an axis of the expansion body is the same as an axis of the mandrel, the cup bottom faces outwards, an axial through hole for sleeving the mandrel is arranged on the cup bottom and can slide along the mandrel, an inner surface (a radial inner surface) of the cup wall of the expansion body is in a frustum shape matched with the expansion portion, and can adopt a multi-piece design and can be pushed inwards in the axial direction of the positioning sleeve, with the surface (radial surface) effect of inflation portion, radial outside inflation, the wall of cup surface (radial surface) of inflation body is the cylindricality, extrudees each other with spheroidal through-hole inner wall when the inflation state, realizes and the spheroid between fixed, the position sleeve is the cylindricality that is equipped with axial through-hole, can be under the promotion of nut axial inwards movement to exert the axial inward thrust to the inflation body. When the expansion valve is used, the axial inner end of the expansion part of the mandrel is inserted into the through hole on the corresponding side of the ball body according to the set position requirement, a valve seat in the valve seat assembly on the corresponding side and a part of the valve seat support ring are sleeved on the outer side of the expansion body, when the nut is further screwed, the nut pushes the positioning sleeve to move axially inwards so as to push the expansion body to move axially inwards, the expansion body expands radially outwards under the action of the frustum surface of the expansion part of the mandrel so as to extrude the ball body, the ball body is fixed with the expansion body (and then with the mandrel) through the extrusion action, the mandrel is used for positioning the ball body, the relative position between the valve seat assembly and the ball body is further controlled, and a limiting part capable of limiting the position of the inner end of the mandrel on each side can be arranged in the ball body through an external mechanism and/or arranged in the ball body (for example, the limiting part positioned in the middle of the through hole of the ball body is respectively matched with the end face of the inner end of the mandrel on each side, e.g., a stop at the connecting end of a spherical fit) defines the axial position of each side mandrel (in the axial direction of the respective mandrel).
The internal diameters of the valve seat and the valve seat support ring (the diameter of the axial through hole) are generally the same as (slightly larger than) the diameter of the ball through hole to allow the expansion body on the mandrel to pass through and facilitate positional stability between the pieces. An annular groove 39 (see fig. 1 and 2) may be provided on the radially inner wall of the seat support ring, a stepped annular notch corresponding to the annular groove on the seat support ring is provided at the axially front end of the positioning sleeve, the cup bottom of the expansion body is blocked at the front end of the positioning sleeve to enclose the step-shaped annular gap at the front end of the positioning sleeve into a groove shape, a plurality of open rings (for example, two open rings, three open rings or four open rings) 64 are arranged between the annular groove of the valve seat support ring and the stepped annular notch of the positioning sleeve, when the positioning sleeve axially moves inwards, the valve seat support ring is pushed to axially move inwards through the multi-open ring, thereby realizing the axial spacing of the valve seat support ring relative to the positioning sleeve through the multiple open rings, the axial position of the valve seat support ring (and thus the valve seat assembly including the valve seat) relative to the spindle can then be determined from the axial position of the nut on the spindle. The relative positions of the valve body and the side mandrels are controlled through an external tool and/or a corresponding executing mechanism, the nuts are rotated to the set positions of the mandrels, the positions of the side valve seat assemblies relative to the valve body can be determined, further, the mutual positions of the ball body and the side valve seat assemblies are fixed, the sealing concentricity and the sealing force consistency of the side valve seats are guaranteed, and good sealing of the side sealing pairs in any sealing state and the stability and the consistency of the opening and closing moment of the valve are guaranteed. Because the multi-open ring is adopted for positioning connection between the valve seat supporting seat and the positioning sleeve, the multi-open ring can still be installed and removed under the condition that the inner diameter of the valve seat supporting seat is smaller than the outer diameter of the multi-open ring.
For the connection or matching mode which allows relative movement between two pieces or needs to be installed and matched, the matching clearance between the two pieces can be determined according to the prior art, and the instability caused by overlarge clearance is avoided under the condition of ensuring the movement or the assembly between the two pieces.
Claims (10)
1. The integral ball valve comprises a valve body and is characterized in that the valve body is an integrally formed valve body and comprises a left connecting pipe, a right connecting pipe and a branch connecting pipe, a vertical valve rod sleeve or a valve rod sleeve interface in a vertical pipe orifice shape is arranged at the top of the valve body, the valve rod sleeve interface is spliced with a valve rod sleeve, and the valve rod sleeve interface are welded together.
2. The integral three-way ball valve according to claim 1, wherein the valve body has a ball serving as an opening/closing member and side seat assemblies respectively associated with the ball, the seat assemblies include seat support rings and seats respectively mounted on the axially inner sides of the seat support rings, the seats are provided with sealing surfaces capable of forming a valve seal with the spherical surface of the ball, the radially outer sides of the seat support rings are provided with positioning tapered surfaces engaging with the inner surface of the valve body, and the inner surfaces of the seats engaging with the positioning tapered surfaces of the seat support rings are tapered.
3. The integral, three-way, unitary ball valve of claim 2, wherein an annular disc spring is disposed between said seat and said seat support ring.
4. The integral, three-way, unitary ball valve of claim 3, wherein the taper of said locating cone on said seat support ring is between 30 ° and 60 °.
5. The integral three-way ball valve according to any one of claims 1 to 4, wherein the welding between said stem sleeve and said stem sleeve opening is an exposed horizontal circular fillet weld.
6. The method for preparing the built-in three-way integral ball valve is characterized in that a straight-through seamless steel pipe is taken as a workpiece, a liquid bulging cold-drawing process is adopted to cold-draw a branch pipe and a jacking pipe, a ball body of a valve and valve seat components on each side are arranged in the cold-drawn workpiece, wherein the ball body is positioned in a cavity where four pipes in the workpiece meet, the valve seat assemblies on each side are respectively positioned on the left side, the right side and the branch pipe side of the ball body, an internal expansion fixture is adopted to position the valve seat assemblies on each side and the ball body, compressing the left side pipe, the right side pipe and the branch pipe into a left connecting pipe, a right connecting pipe and a branch connecting pipe by a cold compression process, attaching the positioning conical surface of each valve seat support ring in each valve seat assembly to the inner surfaces of the conical reducing parts of the left connecting pipe, the right connecting pipe and the branch connecting pipe to form conical positioning between the valve body and the valve seat support ring, the integral three-way integral ball valve of any one of claims 1 to 5.
7. The method of manufacturing an integral three-way ball valve according to claim 6, wherein the branch pipe is cold drawn and the top pipe is cold drawn during cold drawing of the branch pipe and the top pipe by a liquid-bubbling cold-drawing process.
8. The method of manufacturing an integral three-way ball valve according to claim 6, wherein the branch pipe and the top pipe are cold drawn, and the top pipe formed by cold drawing is machined to meet the requirements of the stem sleeve or the stem socket to form the stem sleeve or the stem socket.
9. The method for manufacturing an integral three-way ball valve according to claim 8, wherein before the ball body is inserted, the valve stem assembly to be installed from the inner end of the through hole of the valve stem sleeve is inserted into the workpiece from the orifice of larger diameter and installed in place, and then the ball body is inserted into the workpiece from the orifice of larger diameter and installed in place.
10. A method of making an integral, three-way, internally mounted, ball valve according to any of claims 6 to 9, wherein the seat assembly is assembled by axially positioning the ball and seat assembly using an internal expansion fixture, and cold compressing and removing the internal expansion fixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110791103.4A CN113280170A (en) | 2021-07-13 | 2021-07-13 | Built-in three-way integral ball valve and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110791103.4A CN113280170A (en) | 2021-07-13 | 2021-07-13 | Built-in three-way integral ball valve and preparation method thereof |
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| Publication Number | Publication Date |
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| CN113280170A true CN113280170A (en) | 2021-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110791103.4A Pending CN113280170A (en) | 2021-07-13 | 2021-07-13 | Built-in three-way integral ball valve and preparation method thereof |
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|---|---|---|---|---|
| US3819150A (en) * | 1971-08-16 | 1974-06-25 | Saab Scania Ab | Ball plug valve |
| US3919756A (en) * | 1972-08-14 | 1975-11-18 | Saab Scania Ab | Ball plug valve and method of making the same |
| US4545564A (en) * | 1982-09-10 | 1985-10-08 | Krosoczka Joseph D | Valve |
| US4546790A (en) * | 1983-04-07 | 1985-10-15 | Klinger Ag | Fluid valve |
| JPH10122390A (en) * | 1996-10-23 | 1998-05-15 | Toyo Valve Kk | Ball valve and its manufacture |
| CN1398333A (en) * | 2000-02-03 | 2003-02-19 | 株式会社基茨 | Ball valve and prodn. method therefor |
| WO2014202096A1 (en) * | 2013-06-20 | 2014-12-24 | Broen A/S | Valve and method for making a valve |
| CN112705577A (en) * | 2021-01-26 | 2021-04-27 | 南京坚固高中压阀门制造有限公司 | One-time forming method for valve body and valve pipe of ball valve |
-
2021
- 2021-07-13 CN CN202110791103.4A patent/CN113280170A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3819150A (en) * | 1971-08-16 | 1974-06-25 | Saab Scania Ab | Ball plug valve |
| US3919756A (en) * | 1972-08-14 | 1975-11-18 | Saab Scania Ab | Ball plug valve and method of making the same |
| US4545564A (en) * | 1982-09-10 | 1985-10-08 | Krosoczka Joseph D | Valve |
| US4546790A (en) * | 1983-04-07 | 1985-10-15 | Klinger Ag | Fluid valve |
| JPH10122390A (en) * | 1996-10-23 | 1998-05-15 | Toyo Valve Kk | Ball valve and its manufacture |
| CN1398333A (en) * | 2000-02-03 | 2003-02-19 | 株式会社基茨 | Ball valve and prodn. method therefor |
| WO2014202096A1 (en) * | 2013-06-20 | 2014-12-24 | Broen A/S | Valve and method for making a valve |
| CN112705577A (en) * | 2021-01-26 | 2021-04-27 | 南京坚固高中压阀门制造有限公司 | One-time forming method for valve body and valve pipe of ball valve |
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Address after: No. 2 Yuwei 12th Road, Yufa Town, Daxing District, Beijing 102602 Applicant after: Beijing Beigao Valve Group Co.,Ltd. Address before: 102650 No. 2, Yuwei 12th Road, Yulong Town, Daxing District, Beijing Applicant before: BEIJING BEIGAO VALVE Co.,Ltd. |