CN112943962B - Ultra-low temperature and high pressure angle pressure balanced plunger valve - Google Patents
Ultra-low temperature and high pressure angle pressure balanced plunger valve Download PDFInfo
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- CN112943962B CN112943962B CN202110394616.1A CN202110394616A CN112943962B CN 112943962 B CN112943962 B CN 112943962B CN 202110394616 A CN202110394616 A CN 202110394616A CN 112943962 B CN112943962 B CN 112943962B
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/04—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor
- F16K5/0407—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor with particular plug arrangements, e.g. particular shape or built-in means
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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
- F16K27/065—Construction of housing; Use of materials therefor of taps or cocks with cylindrical plugs
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Details Of Valves (AREA)
Abstract
本发明属于超低温阀门技术领域，具体涉及一种超低温高压角型压力平衡柱塞调节阀，包括依次相连的阀体、阀盖、加长支架、驱动装置，阀体内设有圆柱形阀腔和位于圆柱形阀腔一侧的且与圆柱形阀腔相衔接的出口腔，所述阀芯为与圆柱形阀腔适配的圆柱形柱塞结构，所述出口腔内固定有阀座，所述阀座上设有与阀芯的圆柱体回转面密封配合的阀座密封端面。本发明提供的柱塞式调节阀使用时，流体介质所产生的漩涡以及汽蚀均在柱塞阀芯内壁，即非密封面上，不影响密封效果，有效提高了使用寿命，且在高压差工况下，不会造成抖动，制造工艺加工简单，节约成本。更换简单，安装方便。
The present invention belongs to the technical field of ultra-low temperature valves, and specifically relates to an ultra-low temperature high-pressure angle pressure-balanced plunger regulating valve, comprising a valve body, a valve cover, an extended bracket, and a driving device connected in sequence, wherein a cylindrical valve cavity and an outlet cavity located on one side of the cylindrical valve cavity and connected to the cylindrical valve cavity are provided in the valve body, and the valve core is a cylindrical plunger structure adapted to the cylindrical valve cavity, and a valve seat is fixed in the outlet cavity, and a valve seat sealing end face that seals with the cylindrical rotating surface of the valve core is provided on the valve seat. When the plunger regulating valve provided by the present invention is used, the vortex and cavitation generated by the fluid medium are on the inner wall of the plunger valve core, that is, the non-sealing surface, which does not affect the sealing effect, effectively improves the service life, and does not cause jitter under high pressure difference conditions, and the manufacturing process is simple and cost-saving. It is easy to replace and install.
Description
Technical Field
The invention belongs to the technical field of ultralow temperature valves, and particularly relates to an ultralow temperature high pressure angle type pressure balance plunger regulating valve.
Background
The plunger valve is driven by an extension valve rod and is turned on and off by rotating around the axis of the valve core by 90 degrees or axially displacing, and can also be used for regulating and controlling the flow of fluid, and can be widely applied in the fields of petroleum, petrochemical industry, chemical industry, power plant, metallurgy and the like. In the working condition of a low-temperature medium of an LNG system, higher requirements are provided for a low-temperature valve, and functional requirements such as maintainability on line, high performance, low leakage, long service life and the like are provided. Currently, many low-temperature regulating valves serving on LNG receiving stations still extend to plug-shaped single-seat structures, porous sleeve balance structures, multi-stage depressurization structures and labyrinth valve core structures used in the conventional market. The regulating valve can be used in the simple working conditions of conventional gas, liquid and the like, and cavitation and flash evaporation can occur in the valve cavity in the ultra-low temperature working conditions of special gas such as LNG liquefied natural gas and the like, so that the sealing structure is often caused to deform permanently and irrecoverably to cause internal leakage or external leakage of the valve, and the field large and small accidents of the receiving station are frequently caused. In addition, the plug valves in market or industrial site are basically of lifting type, the valve core is of a suspended plug type or sleeve type structure, after the suspended valve core is opened, the valve core is suspended, cavitation is easily caused by flushing, or the valve rod is unstable due to stress, so that the plug valves are broken, the sleeve type plug valve is sealed and is generally designed on the inner wall of the sleeve, flushing is not resistant, and vibration and noise are easily generated after the valve core is lifted.
The angle type plunger valve can be suitable for being used at a position with limited installation space, one valve is multipurpose, and the structure of one valve and an elbow can be replaced by one angle type plunger valve, but the angle type plunger valve which is used under the ultralow temperature working condition and has long service life is lacking in the market at present.
Disclosure of Invention
The invention aims to overcome the defects and the shortcomings of the prior art and provide an ultralow temperature high pressure angle type pressure balance plunger regulating valve.
The technical scheme adopted by the invention is as follows: the utility model provides an ultralow temperature high pressure angle formula pressure balance plunger governing valve, includes valve body, valve gap, extension support, the drive arrangement that links gradually, drive arrangement connects the valve rod and can drive the valve rod rotation, the valve rod passes extension support, valve gap stretches into the valve body and connects the case that is located the valve body, be equipped with cylindrical valve pocket and the exit chamber that is located cylindrical valve pocket one side and links up with cylindrical valve pocket in the valve body, cylindrical valve pocket both ends are the opening, the valve body is connected entry end cover and valve gap respectively at the both ends of cylindrical valve pocket, is equipped with the oral cavity in the entry end cover;
The valve core is of a cylindrical plunger structure matched with the cylindrical valve cavity, the valve core is arranged in the cylindrical valve cavity and can be rotatably arranged relative to the valve body, two ends of the valve core respectively abut against the inlet end cover and the valve cover, one end, close to the valve cover, of the valve core is provided with a linkage hole in linkage fit with the circumferential direction of the valve rod, one end, far away from the valve cover, of the valve core is provided with a valve core inlet communicated with the inlet cavity, a valve core cavity is arranged in the valve core, the side wall of the valve core is provided with a valve core outlet, the valve core outlet is arranged corresponding to the outlet cavity, and fluid in the inlet cavity flows into the outlet cavity sequentially through the valve core inlet, the valve core cavity and the valve core outlet;
the valve seat is fixed in the outlet cavity, and a valve seat sealing end face in sealing fit with the cylindrical rotating surface of the valve core is arranged on the valve seat.
The outlet cavity is cylindrical, and the central axis of the outlet cavity is perpendicular to the central axis of the cylindrical valve cavity.
The valve seat is characterized in that the outer side of the valve seat is provided with a fixed sleeve connected with the valve body, an elastic piece is arranged between the valve seat and the fixed sleeve, and the sealing end face of the valve seat is kept in sealing contact with the cylindrical rotating face of the valve core under the action of the elastic piece.
The elastic piece is a compression spring and is provided with a plurality of elastic pieces which are arranged at equal intervals along the circumference, the fixed sleeve is matched with the inner wall of the valve body by adopting a threaded structure, and the elastic force of the elastic piece can be adjusted by rotating the fixed sleeve.
The periphery of the valve seat is provided with a sealing ring groove, a single sealing energy storage ring is arranged in the sealing ring groove, and the sealing end of the single sealing energy storage ring is arranged towards the valve core.
The valve seat is formed by combining a first valve seat piece and a second valve seat piece, the sealing end face of the valve seat is arranged on the end face of the first valve seat piece, which is far away from the second valve seat piece, the periphery of the first valve seat piece is close to the slotting of the second valve seat piece to form a sealing ring groove, the end part of the second valve seat piece is protruded to form a convex ring part, and the convex ring part stretches into the sealing ring groove to form a positioning effect on the single sealing energy storage ring.
The valve core inlet and the valve core cavity are formed by inwards forming a cylindrical groove coaxial with the valve core at one end of the valve core, which is far away from the valve cover, and the inner diameter of the valve core inlet is larger than that of the valve core inlet.
The outer peripheral surface of the valve core is provided with an annular groove, the inner wall of the annular groove is a valve core sealing surface in sealing fit with the sealing end surface of the valve seat, and other parts of the valve core, which are opposite to the bulge of the annular groove, are attached to the inner wall of the cylindrical valve cavity.
The valve seat sealing end face and the valve core sealing surface are coated with a hard sealing coating, one end of the inlet end cover, which is abutted against the valve core, is provided with a positioning groove, and one end of the valve core, which is abutted against the inlet end cover, is provided with a positioning convex ring matched with the positioning groove.
The lengthened support is provided with a drip plate, and a plurality of arc-shaped and moon-shaped heat dissipation grooves are arranged between the drip plate and the valve cover.
The beneficial effects of the invention are as follows:
1. in the switching process of the valve core and the valve seat of the plunger type regulating valve, the stable joint position is always kept, and particularly under the working condition of high pressure difference, the valve core and the valve seat cannot shake;
2. Under the working condition of high pressure difference, vortex and cavitation generated by the fluid medium are on the inner wall of the plunger valve core, namely the non-sealing surface, so that the sealing effect is not influenced, and the service life is effectively prolonged;
3. The valve core sealing ring surface belongs to a cylindrical rotating surface, is easy to process, has low processing difficulty coefficient compared with a common low-temperature ball valve ball (valve core) of LNG, has low requirements on processing and detection equipment, and can verify the roundness of the spherical valve core by a high-precision three-coordinate detection instrument. Secondly, the matching and grinding difficulty coefficient of the plunger valve core and the valve seat brings lower requirements to the grinding fixture, and the sealing effect of technical requirements is easier to achieve;
4. in the common valves for driving LNG, a valve front pressure relief structure is designed for safety, and the valve is realized by opening holes in a valve core; the upstream end of the valve core of the plunger type regulating valve can be directly designed and processed into a structure communicated with an upstream pipeline, and the medium cavity has no medium residue after the valve is closed, so that the danger caused by abnormal boosting of the medium cavity is effectively avoided;
5. The plunger valve is formed by an integrated design and mainly comprises a valve body, a lower end cover, an upper cover, a valve core and other internal parts, wherein the valve body and the lower end cover can be integrally processed, the design can be modularized, the manufacturing process is simplified, and the cost is saved. The replacement is simple and the installation is convenient. And can be freely combined with the external connection form of the process pipeline.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that it is within the scope of the invention to one skilled in the art to obtain other drawings from these drawings without inventive faculty.
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a valve body structure in one embodiment of the invention;
FIG. 3 is a schematic perspective view (a) and a sectional view (b) of a valve core according to an embodiment of the present invention;
FIG. 4 is a schematic view of a first valve seat member according to an embodiment of the present invention;
FIG. 5 is an enlarged schematic view of portion A of FIG. 1;
FIG. 6 is a schematic structural diagram of the valve core and the valve seat in cooperation in an embodiment of the present invention, wherein (a) - (d) are schematic structural diagrams of different opening degrees from full open to full closed respectively;
FIG. 7 is an enlarged schematic view of portion B of FIG. 1;
FIG. 8 is a schematic structural diagram of the valve core and the valve seat in cooperation with each other in another embodiment of the present invention, wherein (a) - (d) are schematic structural diagrams of different opening degrees from full open to full closed respectively;
FIG. 9 is a schematic view of the end of a valve stem according to one embodiment of the present invention (a) and an enlarged schematic view of portion C of FIG. 1;
the valve comprises a valve body 1, a cylindrical valve cavity 101, an outlet cavity 102, a valve cover 2, a partition ring 201, a lengthened support, a 301 arc-shaped heat dissipation groove, a 4-part driving device 5, a valve rod 501, a linkage part 502, a matched cylinder 6, a valve core 601, a linkage hole 602, a valve core inlet 603, a valve core cavity 604, a valve core outlet 605, an annular groove 606, a positioning convex ring 607, a matched hole 7, an inlet end cover 701, an inlet cavity 702, a positioning groove 8, a valve seat 801, a valve seat sealing end face 802, a sealing annular groove 803, a first valve seat member 804, a second valve seat member 805, a convex ring part 806, a spring limiting cavity 10, a fixed sleeve 11, an elastic member 12, a single sealing ring 13, a drip plate 14, a bearing 15, a lip sealing ring valve sleeve 16 and a sealing gasket.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent.
The terms of direction and position in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer only to the direction or position of the drawing. Accordingly, directional and positional terms are used to illustrate and understand the invention and are not intended to limit the scope of the invention.
As shown in fig. 1, the ultra-low temperature high pressure angle type pressure balance plunger regulating valve comprises a valve body 1, a valve cover 2, an extension bracket 3 and a driving device 4 which are sequentially connected, wherein the driving device 4 is connected with a valve rod 5 and can drive the valve rod 5 to rotate, the valve rod 5 penetrates through the extension bracket 3 and the valve cover 2 to extend into the valve body 1 to be connected with a valve core 6 positioned in the valve body 1, as shown in fig. 2, a cylindrical valve cavity 101 and an outlet cavity 102 positioned on one side of the cylindrical valve cavity 101 and connected with the cylindrical valve cavity 101 are arranged in the valve body 1, two ends of the cylindrical valve cavity 101 are provided with openings, the valve body 1 is respectively connected with an inlet end cover 7 and the valve cover 2 at two ends of the cylindrical valve cavity 101, and an inlet cavity 701 is arranged in the inlet end cover 7;
As shown in fig. 3, the valve core 6 is of a cylindrical plunger structure matched with the cylindrical valve cavity 101, the valve core 6 is arranged in the cylindrical valve cavity 101 and is rotatably arranged relative to the valve body 1, and two ends of the valve core 6 respectively abut against the inlet end cover 7 and the valve cover 2, one end, close to the valve cover 2, of the valve core 6 is provided with a linkage hole 601 which is in circumferential linkage fit with the valve rod 5, one end, far away from the valve cover 2, of the valve core 6 is provided with a valve core inlet 602 communicated with the inlet cavity 701, a valve core cavity 603 is arranged in the valve core 6, the side wall of the valve core 6 is provided with a valve core outlet 604, the valve core outlet 604 is arranged corresponding to the outlet cavity 102, and fluid in the inlet cavity 701 flows into the outlet cavity 102 sequentially through the valve core inlet 602, the valve core cavity 603 and the valve core outlet 604;
A valve seat 8 is fixed in the outlet cavity 102, and a valve seat sealing end face 801 in sealing fit with the cylindrical rotation face of the valve core 6 is arranged on the valve seat 8.
The outlet cavity 102 is cylindrical, and a central axis of the outlet cavity 102 is perpendicular to a central axis of the cylindrical valve cavity 101.
The valve body 1, the valve cover 2, the lengthened support 3 and the driving device 4 are sequentially connected through fastening bolts.
As shown in fig. 9 (a), the outer periphery of the valve rod 5 is provided with a linkage part 501 which is matched with the linkage hole 601, the linkage hole 601 is connected with the valve core cavity 603 through a cylindrical matching hole 607, and the lower end part of the valve rod 5 is provided with a matching cylinder 502 which is tightly matched with the matching hole 607.
As shown in fig. 9 (b), the inner wall of the valve cover 2 is provided with a convex spacer ring 201, the spacer ring 201 is in clearance fit with the valve rod 5, a valve sleeve bearing 14 positioned at the lower side of the spacer ring 201 and a lip seal 15 positioned at the upper side of the spacer ring 201 are arranged between the valve rod 5 and the valve cover 2, the sealing end of the lip seal 15 is downward, a sealing gasket 16 is arranged between an elongated bracket 3 positioned on the valve cover 2 and the valve cover 2, and a downward extrusion effect is formed on the lip seal 15.
As shown in fig. 5, a fixed sleeve 10 connected with the valve body 1 is arranged on the outer side of the valve seat 8, an elastic member 11 is arranged between the valve seat 8 and the fixed sleeve 10, and under the action of the elastic member 11, a valve seat sealing end face 801 is kept in sealing contact with a cylindrical rotating surface of the valve core 6.
The elastic piece 11 is a compression spring and is provided with a plurality of elastic pieces which are arranged at equal intervals along the circumference, the fixed sleeve 10 is matched with the inner wall of the valve body 1 by adopting a threaded structure, and the elastic force of the elastic piece 11 can be adjusted by rotating the fixed sleeve 10.
The periphery of the valve seat 8 is provided with a sealing ring groove 802, a single sealing energy storage ring 12 is arranged in the sealing ring groove 802, and the sealing end of the single sealing energy storage ring 12 is arranged towards the valve core 6.
The valve seat 8 is formed by combining a first valve seat member 803 and a second valve seat member 804, the valve seat sealing end face 801 is arranged on the end face of the first valve seat member 803 far away from the second valve seat member 804, a groove is formed on the second valve seat member 804 outside Zhou Jiejin of the first valve seat member 803 to form a sealing ring groove 802, a convex ring part 805 is formed on the end part of the second valve seat member 804 in a protruding mode, and the convex ring part 805 stretches into the sealing ring groove 802 to form a positioning function on the single sealing energy storage ring 12. The valve seat 8 is arranged as a split body, so that the single-seal energy storage ring 12 is convenient to assemble and disassemble without damage, and the maintenance cost is low.
The valve core inlet 602 and the valve core cavity 603 are formed by forming a cylindrical groove coaxial with the valve core 6 inwards at one end of the valve core 6 away from the valve cover 2, and the inner diameter of the valve core inlet 602 is larger than that of the valve core inlet 602.
The outer peripheral surface of the valve core 6 is provided with an annular groove 605, the inner wall of the annular groove 605 is a valve core sealing surface in sealing fit with the valve seat sealing end face 801, other parts of the valve core 6, which are opposite to the bulge of the annular groove 605, are attached to the inner wall of the cylindrical valve cavity 101, and hard sealing coatings are sprayed on the surfaces of the valve seat sealing end face 801 and the valve core sealing surface. The hard sealing coating can be specifically a hard sealing coating used in the current valve scene, and the tungsten carbide wear-resistant coating is specifically adopted in the embodiment. Other parts of the valve core 6, which are raised relative to the annular groove 605, are attached to the inner wall of the cylindrical valve cavity 101, so that stable attaching positions are always kept in the valve core opening and closing process, especially shaking cannot be caused under the high pressure difference working condition, the annular groove 605 is arranged to enable the valve core sealing surface to be not attached to the inner wall of the valve body 1, a certain distance is always kept between the valve core sealing surface and the inner wall of the valve body 1 in the valve core opening and closing process, the valve core sealing surface only interacts with the valve seat sealing end face 801, and the service life of the hard sealing coating is prolonged.
One end of the inlet end cover 7 abutting against the valve core 6 is provided with a positioning groove 702, and one end of the valve core 6 abutting against the inlet end cover 7 is provided with a positioning convex ring 606 matched with the positioning groove 702.
As shown in fig. 1, the extension bracket 3 is provided with a drip plate 13, and a plurality of arc-shaped moon-shaped heat dissipation grooves 301 are arranged between the drip plate 13 and the valve cover 2. The drip plate 13 is made of plates, the plates are flattened firstly, friction welding is used for connecting the plates with the lengthened support, flatness and performance of the plates are guaranteed, and heat dissipation of the valve is guaranteed. The current ultra-low temperature valve technical field generally increases the heat dissipation area through modes such as lengthening the valve cover, opening annular heat dissipation groove or increasing heating panel in the outer periphery of the lengthened valve cover, wherein the annular heat dissipation groove formed in the outer periphery of the lengthened valve cover is an annular groove with a rectangular cross section, when the annular heat dissipation groove with a plurality of structures is formed in the outer periphery of the lengthened valve cover, the heat dissipation efficiency can be obviously improved, but the strength of the lengthened support 3 can also be obviously reduced along with the annular heat dissipation groove, because the wall thickness of the part of the lengthened support 3 provided with the annular heat dissipation groove is obviously reduced, the part of the lengthened support 3 is relatively easy to bend under the action of external force, if the wall thickness of the lengthened support 3 is increased, the heat dissipation efficiency is influenced, the arc-moon-shaped heat dissipation groove 301 is formed in the arc-moon-shaped cross section, namely the surface of the arc-moon-shaped heat dissipation groove is concave curved, and the wall thickness of the part of the lengthened support 3 is reduced, but the concave curved surface is arranged to effectively improve the bending resistance of the lengthened support 3, and improve the strength of the whole support 3.
Compared with the existing product, the plunger regulating valve provided by the embodiment has the following effects:
1. The angle valve design structure is adopted, the angle valve can be suitable for being used at a position with limited installation space, one valve is multipurpose, and the angle plunger valve can replace a structure for transmitting one valve and one elbow.
2. As shown in fig. 1, the fluid in the inlet cavity 701 flows into the outlet cavity 102 through the valve core inlet 602, the valve core cavity 603 and the valve core outlet 604 in sequence, and the fluid firstly enters the valve core cavity 603 due to the cylindrical rotation surface of the valve core with the valve seat sealing structure positioned at the periphery of the valve core outlet 604, and cavitation generated by flow resistance completely occurs in the valve core cavity, so that the sealing surface is not affected at all, the valve seat sealing structure is not affected, and the valve seat sealing structure can be used under any high pressure difference working condition.
3. The valve body 1 and the valve core 6 inlet end cover 7 can be integrally machined, as shown in fig. 2, the valve body 1 of the embodiment is simple to machine, the inner cavity of the valve body 1 is formed by two cylindrical through holes with the central shafts perpendicular to each other, high-precision machining can be realized under the condition of lower cost, meanwhile, the valve core sealing ring surface belongs to a cylindrical rotating surface, the valve core is extremely easy to machine, compared with a common low-temperature ball valve ball (valve core) of LNG, the machining difficulty coefficient of a plunger valve core is low, the requirements on machining and detection equipment are low, and a spherical valve core can be verified by a three-coordinate detection instrument with high precision generally. Secondly, the coefficient of mating and grinding difficulty of the plunger valve core and the valve seat provides lower requirements for the grinding fixture, and the sealing effect of technical requirements is easier to achieve.
4. In the common valve for driving LNG, a valve front pressure relief structure is designed for safety, and is realized by forming holes in a valve core, the plunger type regulating valve provided by the embodiment adopts a valve rear sealing structure, the upstream end of the valve core is directly designed and processed into a structure communicated with an upstream pipeline, and the medium cavity is free of any medium residue after the valve is closed, so that the danger caused by abnormal pressure rise of the medium cavity is effectively avoided.
5. In the embodiment, the valve rod is tightly matched with the valve core, the radial force born by the valve rod is small, and the valve rod is not easy to break.
6. The valve core of this embodiment, the valve core outlet 604 is disposed on the side wall of the valve core 6, and the structure of the valve core outlet 604 can be adjusted according to the actual working condition requirement, and the valve core outlet 604 can be a strip-shaped hole as shown in fig. 6, a diamond-shaped hole as shown in fig. 8, or a through hole with other shapes, so that the valve has different adjusting performances, can be made into a linear type, an equal percentage, a full-diameter type, and has a small flow resistance and a controllable flow. The diamond-shaped holes can adapt to the cutting and adjusting functions of the medium with particles.
7. The upper end and the lower end of the valve core of the embodiment are respectively supported and limited by the valve cover 2 and the inlet end cover 7, the peripheral wall is limited by the valve body and can only rotate circumferentially, and shaking cannot be caused in the opening and closing process of the valve core and the valve seat, particularly under the high pressure difference working condition, so that shaking cannot be generated.
8. The valve rod of this embodiment is compressed tightly in the valve body, effectively avoids the danger that the valve rod flies out under the high pressure condition and causes.
The foregoing disclosure is illustrative of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (10)
1. The ultra-low temperature high pressure angle type pressure balance plunger regulating valve comprises a valve body (1), a valve cover (2), a lengthened support (3) and a driving device (4) which are sequentially connected, wherein the driving device (4) is connected with a valve rod (5) and can drive the valve rod (5) to rotate, the valve rod (5) penetrates through the lengthened support (3) and the valve cover (2) to stretch into the valve body (1) to be connected with a valve core (6) positioned in the valve body (1), and the ultra-low temperature high pressure angle type pressure balance plunger regulating valve is characterized in that a cylindrical valve cavity (101) and an outlet cavity (102) which is positioned on one side of the cylindrical valve cavity (101) and is connected with the cylindrical valve cavity (101) are arranged at two ends of the cylindrical valve cavity (101), the two ends of the cylindrical valve cavity (101) are respectively connected with an inlet end cover (7) and the valve cover (2), and an inlet cavity (701) is arranged in the inlet end cover (7);
The valve core (6) is of a cylindrical plunger structure matched with the cylindrical valve cavity (101), the valve core (6) is arranged in the cylindrical valve cavity (101) and is rotatably arranged relative to the valve body (1), two ends of the valve core (6) are respectively abutted against the inlet end cover (7) and the valve cover (2), one end, close to the valve cover (2), of the valve core (6) is provided with a linkage hole (601) which is in circumferential linkage fit with the valve rod (5), one end, far away from the valve cover (2), is provided with a valve core inlet (602) communicated with the inlet cavity (701), a valve core cavity (603) is arranged in the valve core (6), a valve core outlet (604) is arranged on the side wall of the valve core (6), the valve core outlet (604) is arranged corresponding to the outlet cavity (102), and fluid in the inlet cavity (701) flows into the outlet cavity (102) sequentially through the valve core inlet (602), the valve core cavity (603) and the valve core outlet (604);
a valve seat (8) is fixed in the outlet cavity (102), and a valve seat sealing end face (801) which is in sealing fit with the cylindrical rotating surface of the valve core (6) is arranged on the valve seat (8).
2. The ultra-low temperature and high pressure angle type pressure balance plunger regulating valve according to claim 1, wherein the outlet cavity (102) is cylindrical, and the central axis of the outlet cavity (102) is perpendicular to the central axis of the cylindrical valve cavity (101).
3. The ultralow temperature high pressure angle type pressure balance plunger regulating valve according to claim 2 is characterized in that a fixed sleeve (10) connected with the valve body (1) is arranged on the outer side of the valve seat (8), an elastic piece (11) is arranged between the valve seat (8) and the fixed sleeve (10), and under the action of the elastic piece (11), the sealing end face (801) of the valve seat is kept in sealing contact with the cylindrical rotating surface of the valve core (6).
4. The ultralow temperature high pressure angle type pressure balance plunger regulating valve according to claim 3 is characterized in that the elastic piece (11) is a compression spring and is provided with a plurality of elastic pieces which are arranged at equal intervals along the circumference, the fixed sleeve (10) is matched with the inner wall of the valve body (1) through a threaded structure, and the elastic force of the elastic piece (11) can be regulated through rotating the fixed sleeve (10).
5. The ultralow temperature high pressure angle type pressure balance plunger regulating valve according to any one of claims 1-4 is characterized in that a sealing ring groove (802) is formed in the periphery of the valve seat (8), a single sealing energy storage ring (12) is arranged in the sealing ring groove (802), and the sealing end of the single sealing energy storage ring (12) is arranged towards the valve core (6).
6. The ultra-low temperature high-pressure angle type pressure balance plunger regulating valve according to claim 5, wherein the valve seat (8) is formed by combining a first valve seat member (803) and a second valve seat member (804), the valve seat sealing end face (801) is arranged on the end face, far away from the second valve seat member (804), of the first valve seat member (803), the outer Zhou Jiejin of the first valve seat member (803) is used for grooving the second valve seat member (804) to form a sealing ring groove (802), the end part of the second valve seat member (804) is protruded to form a convex ring part (805), and the convex ring part (805) stretches into the sealing ring groove (802) to form a positioning function on the single sealing energy storage ring (12).
7. The ultralow temperature high pressure angle type pressure balance plunger regulating valve of claim 1, wherein the valve core inlet (602) and the valve core cavity (603) are formed by inwards forming a cylindrical groove coaxial with the valve core (6) at one end of the valve core (6) far away from the valve cover (2), and the inner diameter of the valve core inlet (602) is larger than that of the valve core inlet (602).
8. The ultralow temperature high pressure angle type pressure balance plunger regulating valve of claim 1 is characterized in that an annular groove (605) is formed in the outer peripheral surface of the valve core (6), the inner wall of the annular groove (605) is a valve core sealing surface in sealing fit with the valve seat sealing end surface (801), other parts of the valve core (6) protruding relative to the annular groove (605) are attached to the inner wall of the cylindrical valve cavity (101), and hard sealing coatings are sprayed on the surfaces of the valve seat sealing end surface (801) and the valve core sealing surface.
9. The ultralow temperature high pressure angle type pressure balance plunger regulating valve of claim 1, wherein one end of the inlet end cover (7) abutting against the valve core (6) is provided with a positioning groove (702), and one end of the valve core (6) abutting against the inlet end cover (7) is provided with a positioning convex ring (606) matched with the positioning groove (702).
10. The ultra-low temperature high pressure angle type pressure balance plunger regulating valve according to claim 1, wherein a drip plate (13) is arranged on the lengthened bracket (3), and a plurality of arc-moon-shaped radiating grooves (301) are arranged between the drip plate (13) and the valve cover (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110394616.1A CN112943962B (en) | 2021-04-13 | 2021-04-13 | Ultra-low temperature and high pressure angle pressure balanced plunger valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110394616.1A CN112943962B (en) | 2021-04-13 | 2021-04-13 | Ultra-low temperature and high pressure angle pressure balanced plunger valve |
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| Publication Number | Publication Date |
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| CN112943962A CN112943962A (en) | 2021-06-11 |
| CN112943962B true CN112943962B (en) | 2025-04-01 |
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| CN202110394616.1A Active CN112943962B (en) | 2021-04-13 | 2021-04-13 | Ultra-low temperature and high pressure angle pressure balanced plunger valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024245257A1 (en) * | 2023-05-29 | 2024-12-05 | 浙江三花汽车零部件有限公司 | Valve device and manufacturing method |
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| CN104654886A (en) * | 2014-12-30 | 2015-05-27 | 浙江耐乐铜业有限公司 | Internal threaded heat-transfer copper pipe |
| CN108591510A (en) * | 2018-06-20 | 2018-09-28 | 武汉汉德阀门股份有限公司 | A kind of bilateral angle valve |
| CN211315185U (en) * | 2019-12-27 | 2020-08-21 | 信泰阀门集团有限公司 | Ultra-low temperature 90-degree switch straight-tube valve core rotary valve |
| CN214578991U (en) * | 2021-04-13 | 2021-11-02 | 特技阀门集团有限公司 | Ultra-low temperature high pressure angle type pressure balance plunger valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202790586U (en) * | 2011-12-30 | 2013-03-13 | 艾默生过程管理(天津)阀门有限公司 | Valve trim component for flow control valve and flow control valve |
| CN102829212A (en) * | 2012-08-20 | 2012-12-19 | 天津祥嘉流体控制系统有限公司 | Ultra-low temperature ball valve |
| US9395009B2 (en) * | 2013-10-18 | 2016-07-19 | Fisher Controls International Llc | Fluid flow device that provides a seal by exploiting differential thermal expansion |
| CN104776242B (en) * | 2015-04-07 | 2017-07-07 | 武汉汉德阀门股份有限公司 | Angle stroke angle valve |
| JP6656859B2 (en) * | 2015-09-24 | 2020-03-04 | 株式会社不二工機 | Flow path switching valve |
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|---|---|---|---|---|
| CN104654886A (en) * | 2014-12-30 | 2015-05-27 | 浙江耐乐铜业有限公司 | Internal threaded heat-transfer copper pipe |
| CN108591510A (en) * | 2018-06-20 | 2018-09-28 | 武汉汉德阀门股份有限公司 | A kind of bilateral angle valve |
| CN211315185U (en) * | 2019-12-27 | 2020-08-21 | 信泰阀门集团有限公司 | Ultra-low temperature 90-degree switch straight-tube valve core rotary valve |
| CN214578991U (en) * | 2021-04-13 | 2021-11-02 | 特技阀门集团有限公司 | Ultra-low temperature high pressure angle type pressure balance plunger valve |
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