WO2015161831A1 - 阀座密封垫的保护组件及调压器 - Google Patents

阀座密封垫的保护组件及调压器 Download PDF

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Publication number
WO2015161831A1
WO2015161831A1 PCT/CN2015/077449 CN2015077449W WO2015161831A1 WO 2015161831 A1 WO2015161831 A1 WO 2015161831A1 CN 2015077449 W CN2015077449 W CN 2015077449W WO 2015161831 A1 WO2015161831 A1 WO 2015161831A1
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WO
WIPO (PCT)
Prior art keywords
gasket
valve seat
protection
flange
ring
Prior art date
Application number
PCT/CN2015/077449
Other languages
English (en)
French (fr)
Inventor
贾寅
王乐
秦晓娟
熊乙锟
刘丹
Original Assignee
费希尔久安输配设备(成都)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 费希尔久安输配设备(成都)有限公司 filed Critical 费希尔久安输配设备(成都)有限公司
Priority to RU2016145077A priority Critical patent/RU2690325C2/ru
Priority to BR112016024656A priority patent/BR112016024656A8/pt
Publication of WO2015161831A1 publication Critical patent/WO2015161831A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/46—Attachment of sealing rings

Definitions

  • the utility model relates to the field of voltage regulators, in particular to a protection component and a pressure regulator of a valve seat gasket.
  • the valve seat 12 of the pressure regulator 1 is provided with a gasket 13, and the material of the gasket 13 is mostly rubber.
  • soft sealing materials such as rubber are difficult to withstand the scouring of high-pressure and high-flow media.
  • the temperature will be much lower than that under high pressure conditions.
  • the rubber Under the rubber, the elasticity of the rubber will be deteriorated and it is easy to be damaged.
  • the utility model provides a valve seat gasket protection component and a pressure regulator, which solves the problem that the above-mentioned existing gasket is damaged due to damage, thereby causing sealing failure.
  • the protection assembly includes a valve port and a valve seat, the valve seat includes a gasket; the gasket includes a vulnerable area on the outlet side of the valve port, and the protection assembly further includes a protection ring, wherein the The protective ring portion overlies the vulnerable area of the gasket.
  • a first flange is disposed on the first portion of the guard ring of the protection assembly, wherein the first portion is located on a surface of the valve seat.
  • the first flange of the above protective component has a trapezoidal shape, a rectangular shape or a triangular shape in a vertical direction.
  • the first flange of the above-described protection assembly is rounded or chamfered in a vertical cross section corresponding to an angle of the first flange and the gasket contact portion.
  • the protective assembly further includes a first cage, wherein the first cage secures the guard ring to the valve seat through a second portion of the guard ring.
  • the second portion of the protection assembly has an L shape or an inverted L shape in a vertical direction, and the second portion has a first end portion in a vertical direction and a second end portion in a horizontal direction. The first end is coupled to the first portion, and the second end is in contact with the first cage or the valve seat.
  • the second portion of the protection assembly has an L shape in a vertical direction, and a portion of the first cage that is in contact with the protection ring is provided with a first groove, and the second end is embedded in the Said in the first groove;
  • a cross section of the second portion in the vertical direction is an inverted L shape, a portion of the valve seat contacting the second portion is provided with a second groove, and the second end portion is embedded in the second portion In the groove.
  • the protection ring of the protection component is integrally formed with the valve seat; or
  • the protection assembly includes a second cage, and the protection ring is integrally formed with the second cage.
  • the guard ring of the above protective assembly is fixed to the valve seat by a fastener.
  • the protection ring of the above protection assembly is provided with a second flange, and the protection ring is located on the surface of the valve seat.
  • the second flange of the above protective component has a trapezoidal shape, a rectangular shape or a triangular shape in a vertical direction.
  • An angle corresponding to a contact portion of the second flange and the gasket in the cross section of the protective component is rounded or chamfered.
  • the valve port of the protection assembly is provided with a cutting edge, wherein a cross section of the cutting edge in a vertical direction is a right-angled trapezoid, and a right-angled side of the right-angled trapezoid is located on the side of the vulnerable area.
  • the utility model also provides a voltage regulator, comprising any of the above protection components.
  • the service life of the gasket can be extended under the conditions of high pressure difference and high flow rate.
  • the protective component of the valve seat gasket of the utility model and the pressure regulator can change the flow state of the medium in the high pressure difference and high flow velocity region by covering the protective ring portion in the vulnerable area of the sealing gasket, and reduce the local pressure difference and The flow rate, while covering the vulnerable area, can effectively extend the life of the gasket and prevent it from being damaged.
  • FIG. 1 is a schematic view of a voltage regulator in the prior art and a partial schematic view thereof;
  • FIG. 2 is a partial schematic view of a protection assembly according to an embodiment of the present invention.
  • FIG 3 is a perspective view of the valve cage of the valve seat gasket protection assembly shown in Figure 2;
  • FIG. 4 is a partial schematic view of a protection assembly according to an embodiment of the present invention.
  • Figure 5 is a partial schematic view of a protection assembly according to one embodiment of the present invention.
  • Figure 6 is a perspective view of the protection ring of the protection assembly shown in Figure 5;
  • Figure 7 is a cross-sectional view of the valve seat and the gasket of the protection assembly shown in Figure 5;
  • FIG. 8 is a partial schematic view of a protection assembly according to an embodiment of the present invention.
  • FIG. 9 is a partial schematic view of a protection assembly according to an embodiment of the present invention.
  • Figure 10 is a cross-sectional view of the cage of the protection assembly of Figure 9;
  • FIG. 11 is a partial schematic view of a protection assembly according to an embodiment of the present invention.
  • FIG. 12 is a partial schematic view of a protection assembly according to an embodiment of the present invention.
  • FIG. 13 is a partial schematic view of a protection assembly according to an embodiment of the present invention.
  • Figure 14 is a perspective view of the protective ring of the protection assembly shown in Figure 13;
  • Figure 15 is a partial schematic view of a protection assembly according to one embodiment of the present invention.
  • Figure 16 is a partial view of a voltage regulator and a partial portion thereof according to an embodiment of the present invention.
  • the utility model provides a protection assembly for a valve seat gasket, comprising a valve port and a valve seat, the valve seat comprising a gasket, the gasket comprising a vulnerable area on the outlet side of the valve port, ie High pressure difference and high flow rate bearing area,
  • the protection assembly also includes a guard ring that partially covers the vulnerable area.
  • the medium is rapidly decompressed, exploding, and the flow rate is sharply increased while the temperature is drastically lowered.
  • the vulnerable area of the gasket on the outlet side of the valve port will withstand the high pressure difference and the high flow rate, because the protection ring partially covers the vulnerable area of the gasket, and the protection ring and the cutting edge are formed.
  • the two valve ports can change the local flow state of the medium, reduce the local pressure difference and flow rate, and extend the life of the gasket.
  • the first portion of the protective assembly of the embodiment of the present invention is provided with a first flange, the first portion being located on the surface of the valve seat, and the protection is placed when the valve seat is placed in the direction shown in the drawing
  • the first portion of the ring is located on the upper surface of the valve seat, it being understood that the guard assembly is located on the lower surface of the valve seat when the valve seat of the regulator or valve is inverted.
  • the cross section of the first flange in the vertical direction is trapezoidal, rectangular or triangular. Due to the vertical slit between the cutting edge and the first flange of the protection ring, a structure similar to the double valve port is formed, which can change the local flow state and reduce the local pressure drop in the vulnerable area of the gasket. And the flow rate, thereby changing the flow state after the medium flows out of the gap between the valve port and the gasket, and reducing the local pressure drop and flow rate of the vulnerable portion of the gasket to prevent the high-speed low-temperature fluid from scouring and damaging the gasket.
  • the angle of the first flange of the protection ring corresponding to the contact portion of the first flange and the gasket is rounded or chamfered, and when the valve port is closed, the soft gasket will be The first flange is extruded at the corner of the contact portion of the gasket, and the rounded or chamfered design prevents the gasket from being cut when it is extruded.
  • the angle of the first flange that is not in contact with the gasket may also be rounded or chamfered, which may be used for gentle airflow.
  • the protection ring has a plurality of mounting and fixing manners
  • the protection assembly includes a first cage, the guard ring including a second portion, the first cage securing the guard ring to the valve seat by the second portion.
  • the cross section of the second portion in the vertical direction is an L shape or an inverted L shape
  • the second portion includes a first end portion in a vertical direction and a second end portion in a horizontal direction, A first end is coupled to the first portion and the second end is in contact with the first cage or the valve seat.
  • a cross section of the second portion in the vertical direction is an L shape
  • a portion of the first cage that is in contact with the protection ring is provided with a first groove, and the second end is embedded in the first portion In a groove
  • a portion of the valve seat contacting the second portion is provided with a second groove, and the second end portion is embedded in the In the second groove.
  • the protection ring may also be integrally formed with the valve seat
  • the protection assembly may further include a second cage, the guard ring being integrally formed with the second cage.
  • the guard ring may be riveted to the valve seat or secured to the valve seat by fasteners.
  • the protection ring arrangement may further be provided with a second flange, the protection ring is located on an upper surface of the valve seat, and the second flange has a trapezoidal shape in a vertical direction, a rectangle or a triangle .
  • the corner of the contact portion of the second flange and the gasket is rounded or chamfered.
  • the valve port of the protection assembly of the present invention is provided with a cutting edge, the cutting edge has a right-angled trapezoidal cross section in the vertical direction, and the right-angled side of the right-angled trapezoid is located on the side of the vulnerable area.
  • the blade can be prevented from coming into contact with the protection ring to generate friction when the valve port is closed.
  • FIG. 2 shows a partial cross-sectional view of a protective assembly 20 of an embodiment of the present invention, including a valve port 21, a valve seat 22, a gasket 23 on the valve seat 22, and a guard ring 24 for protecting the gasket 23.
  • the protective assembly 20 also includes a cage 25 that mates with the valve seat 22, and the cage 25 of the present embodiment can be a preferred embodiment of the first cage of the above embodiment.
  • the protection ring 24 of the embodiment includes a first portion 241 and a second portion 242, and the first portion 241 is provided with a first flange 243, and the first flange 243 partially covers the gasket 23 On the damaged area 231, the second portion 242 is used to cooperate with the valve seat 22 and the cage 25 to fix the protection ring 24.
  • the valve port 21 further includes a cutting edge 211.
  • the cutting edge 211 of the valve opening 21 is in contact with the sealing pad 23 on the valve seat 22, because the sealing pad 23 is soft in material.
  • the cutting edge is embedded in the gasket 23.
  • the valve opening degree is small at this time. If the pressure difference between the inlet and the outlet is large, the high pressure medium enters a relatively large gap after passing through the narrow gap formed by the valve port and the gasket. In space, the working medium is rapidly decompressed, exploding, the flow rate is sharply increased, and the temperature is drastically reduced. At this time, the protection ring partially covers the vulnerable area of the gasket, and the protection ring can also form a second valve port with the cutting edge, which changes the local flow state of the medium, and reduces the local pressure difference and the flow rate. Effectively extend the life of the gasket.
  • the first flange 243 of the guard ring 24 is adjacent to, but not in contact with, the cutting edge 211 of the valve port 21.
  • the cross section of the first flange 243 of the first portion 241 in the vertical direction is a right-angled trapezoid on the side of the valve outlet, and when the valve opening is small, the high-pressure medium is first narrowed from the horizontal direction.
  • the gap enters the mouth, and since the first flange of the first portion 241 of the protection ring 24 is located outside the cutting edge, the high-pressure medium hits the first flange and then flows upward, changing the local flow state in the original design, reducing the original
  • the partial pressure drop and flow rate in the vulnerable area of the gasket form a second valve port; at the same time, partially cover the gasket on the valve seat to prevent the gasket from being subjected to high pressure difference and high flow rate and damage failure.
  • the cross section of the first flange of the protection ring in the vertical direction may also be a rectangular shape, and the first flange having a rectangular cross section will have a certain height, so that the formed second valve port is thinner. Long, strengthens the role of the second valve port "reduce local pressure difference and flow rate".
  • the cross section of the first flange of the protection ring in the vertical direction may also be a triangle.
  • the second portion 242 of the guard ring 24 includes a first end portion in the vertical direction and a second end portion in the horizontal direction, the cross section of which is "L" in the vertical direction, the first end portion Connected to the first portion 241, wherein the portion of the cage that is in contact with the second portion is provided with a first groove, the second end is embedded in the first groove, when the protection When the assembly is in the assembled state, the cage can be press-fitted to the valve seat by the second part of the protection ring.
  • the upper apex angle and the angle of the contact portion with the gasket that is, the lower apex angle
  • the lower top The corners are rounded or chamfered to protect the gasket from damage when squeezed by the cutting edge.
  • the top apex angle may also be rounded or chamfered for gentle airflow.
  • the angle of contact with the gasket can also be designed to be rounded or chamfered, and the cross section in the vertical direction is triangular, trapezoidal or
  • the first flange of the rectangle can form a second valve port with the cutting edge portion of the valve port, thereby changing the flow state after the medium flows out of the gap between the valve port and the gasket, and reducing the local pressure drop and the flow rate of the vulnerable portion of the gasket. Avoid damage to the gasket.
  • An advantage of this embodiment is that, on the one hand, the first flange of the protection ring covers the vulnerable area of the gasket 23 Domain, to avoid serious direct flushing of the gasket; on the other hand, the first flange of the protection ring and the second valve port formed by the cutting edge change the local flow state of the medium, reducing the local pressure difference and The flow rate can effectively extend the life of the gasket and avoid damage to the gasket caused by high pressure difference and high flow rate medium.
  • the protection ring of this embodiment is fixed in such a manner that its portion is pressed against the valve seat by the cage.
  • the protection assembly 30 includes a valve port 31, a valve seat 32, and a gasket 33 on the valve seat 32.
  • the guard ring 34 for protecting the gasket 33, and the cage 35 mated with the valve seat 32, the cage of the present embodiment may be a preferred embodiment of the first cage of the embodiment 1.
  • the guard ring 34 also has a first portion 341 that partially covers the vulnerable region 331 of the gasket 33 and a second portion 342 that will withstand the high pressure differential and high flow rate of the fluid medium.
  • the second portion 342 integrally formed with the first portion 341 has a cross section of an "L" shape in a vertical direction, a portion of the second portion in the horizontal direction is long, and is integrally formed by the valve cage Press firmly on the valve seat.
  • the first portion 341 of the guard ring 34 of the present embodiment includes a first flange having a right-angled cross section in a vertical direction, including an upper apex angle and an angle of a portion in contact with the gasket,
  • the lower apex angle preferably, the lower apex angle is rounded or chamfered for protecting the gasket from being damaged when pressed by the cutting edge.
  • the top apex angle may also be rounded or chamfered for gentle airflow.
  • the protection ring can form a second valve port with the cutting edge portion of the valve port, thereby changing the flow state after the medium flows out of the gap between the valve port and the gasket, reducing the partial pressure drop and the flow rate of the vulnerable portion of the gasket, and avoiding the sealing.
  • the pad is damaged.
  • the first flange of the protection ring may have a rectangular cross section in a vertical direction, and the first flange having a rectangular cross section has a certain height, so that the formed second valve port is more elongated. , strengthen the role of the second valve port "reduce the local pressure difference and flow rate".
  • the cross section of the first flange of the protection ring in the vertical direction may also be a triangle.
  • the difference from the second embodiment lies in the manner of fixing the protection ring 34.
  • the groove of the cage 35 of the present embodiment is not provided with a groove, and the bottom of the cage is directly pressed against the vertical section with the cross section of the "L" shape.
  • the seat gasket protection assembly of this embodiment can secure the guard ring 34 without providing a recess in the cage.
  • the advantage of this embodiment is that, on the one hand, the first part of the protection ring covers the vulnerable area of the gasket 33, and the sealing pad is prevented from being severely directly washed; on the other hand, the first flange of the protection ring is
  • the second valve port formed by the cutting edge changes the local flow state of the medium, reduces the local pressure difference and the flow rate, can effectively extend the life of the gasket, and avoid damage caused by the high pressure difference and high flow rate medium to the gasket.
  • the protection ring of the embodiment is fixed in such a manner that the horizontal portion of the second portion of the protection ring is integrally pressed against the valve seat by the cage.
  • valve seat gasket protection assembly 40 of the present embodiment includes a valve port 41, and a valve seat 42 embedded in the valve seat 42.
  • the gasket 43 is used to protect the guard ring 44 of the gasket 43 and the cage 45 mated with the valve seat 42.
  • the cage of the present embodiment may be a preferred embodiment of the first cage of the embodiment 1.
  • the guard ring 44 has a first portion and a second portion, the first portion covering a vulnerable area of the gasket, the first flange of the first portion having a right angle in a vertical direction a trapezoidal cross section, further comprising an upper apex angle and an angle of a portion contacting the gasket, that is, a lower apex angle, preferably, the lower apex angle is rounded or Chamfering, when the valve port is closed, the soft gasket will be squeezed out from the lower corner.
  • the rounded or chamfered design prevents the seal from being cut when the cutting edge squeezes the seal.
  • the top apex angle may also be rounded or chamfered for gentle airflow.
  • the first flange of the protection ring may have a rectangular cross section in a vertical direction, and the first flange having a rectangular cross section has a certain height, so that the formed second valve port is more elongated. , strengthen the role of the second valve port "reduce the local pressure difference and flow rate".
  • the cross section of the first flange of the protection ring in the vertical direction may also be a triangle.
  • the second portion of the protection ring 44 has an inverted "L" shape in the vertical direction, and the second side groove is disposed on the side wall of the valve seat 42.
  • the second end portion 443 of the second portion of the horizontal portion is embedded in the second recess of the valve seat 42.
  • Figure 6 shows a perspective view of the guard ring 44 of the present embodiment.
  • the guard ring 44 is composed of two half rings which can be respectively sleeved on the valve seat 42 as shown in Figure 7 to form an annular protection ring.
  • the columnar valve cage is sleeved on the valve seat 42 and located outside the protection ring 44, and the protection ring 44 can be fastened to the valve seat 42 from the side.
  • the protection ring may further include a plurality of arc segments, and the plurality of arc segments may be spliced into a full circle.
  • An advantage of this embodiment is that, on the one hand, the first portion of the protection ring covers the vulnerable area of the gasket 43 to prevent the gasket 43 from being severely directly washed; on the other hand, the first protrusion of the protection ring 44
  • the second valve port formed by the edge and the cutting edge changes the local flow state of the medium, reduces the local pressure difference and the flow rate, can effectively extend the life of the gasket, and avoid damage caused by the high pressure difference and high flow rate medium to the gasket.
  • the protection ring of the embodiment is fixed by pressing the protection ring from the side to the valve seat through the valve cage.
  • FIG. 8 shows a partial cross-sectional view of a valve seat gasket protection assembly 50 of Embodiment 5, the protection assembly 50 of the present embodiment including a valve port 51, a valve seat 52, and a guard ring 54 for protecting the gasket 53.
  • the valve seat 52 is provided with a third recess 521, wherein the third recess 521 is used for accommodating the gasket 53.
  • the protection ring 54 of the embodiment is integrally formed with the valve seat 52, and simultaneously The first flange of the guard ring 54 overlies the third recess 521 of the valve seat 52 for receiving the gasket 53, which also protects the vulnerable area of the gasket 53.
  • the first flange of the protection ring 54 has a right-angled cross section in a vertical direction, and the angle of the contact portion with the gasket, that is, the lower apex angle is rounded or chamfered, when the valve is When the mouth is closed, the soft gasket will be squeezed out from the lower corner.
  • the rounded or chamfered design prevents the gasket from being cut when the cutting edge squeezes out the gasket.
  • the top apex angle may also be rounded or chamfered for gentle airflow.
  • the first flange of the protection ring may have a rectangular cross section in a vertical direction, and the first flange having a rectangular cross section has a certain height, so that the formed second valve port is more elongated.
  • the effect of the second valve port "reducing the partial pressure difference and flow rate" is enhanced.
  • the cross section of the first flange of the protection ring in the vertical direction may also be a triangle.
  • the protective assembly 60 of the present embodiment includes a valve port 61, a valve seat 62, a gasket 63 located within the valve seat 62, and a valve having a guard ring 64.
  • the cage 65, the cage of this embodiment may be a preferred embodiment of the second cage of Embodiment 1, the guard ring 64 including a second flange 66.
  • Figure 10 shows a cross-sectional view of the cage 65 which is integrally formed with the cage 65 and which forms a flange at the inner lower end of the cage; when in the assembled state, see 9, the protective ring 64 part of the cage Covering the vulnerable area of the gasket to protect the gasket from high pressure difference and high flow rate damage.
  • the second flange 66 of the protection ring 64 has a right-angled cross section in the vertical direction, and the angle of the contact portion with the gasket, that is, the lower apex angle is rounded or chamfered, when the valve is When the mouth is closed, the soft gasket will be squeezed out from the lower corner.
  • the rounded or chamfered design prevents the gasket from being cut when the cutting edge squeezes out the gasket.
  • the top apex angle that is not in contact with the gasket may also be rounded or chamfered for gentle airflow.
  • the second flange of the protection ring may have a rectangular cross section in a vertical direction, and the second flange having a rectangular cross section has a certain height, so that the formed second valve port is more elongated.
  • the effect of the second valve port "reducing the partial pressure difference and flow rate" is enhanced.
  • the cross section of the second flange of the protection ring in the vertical direction may also be a triangle.
  • FIG. 11 is a partial cross-sectional view showing a valve seat gasket protection assembly 70 of Embodiment 7, which, like Embodiment 2, includes a valve port 71, a valve seat 72, and a valve embedded therein. a gasket 73 in the seat 72, a protection ring 74 for protecting the gasket 73, and a valve cage 75 mated with the valve seat 72.
  • the cage of the present embodiment may be a preferred implementation of the first cage of the embodiment 1. the way,.
  • the guard ring 74 also has a first portion and a second portion, the first flange of the first portion covering a vulnerable area of the gasket 73, and the second portion integrally formed with the first portion having a vertical portion
  • the cross section in the straight direction is an "L" shape, and the second end portion of the second portion in the horizontal direction is fixed by the valve cage on the valve seat.
  • the first flange of the first portion of the protection ring 74 of the present embodiment has a cross section that is rectangular in the vertical direction, and preferably, the angle at which it contacts the gasket, that is, the lower apex angle has Rounded or chamfered design, when the valve port is closed, the soft gasket will be squeezed out from the lower corner.
  • the rounded or chamfered design prevents the gasket from being cut when it is squeezed out.
  • the first flange of the protection ring of the embodiment has a certain height.
  • the first flange of the protection ring covers the gasket to protect the gasket from high pressure damage.
  • the second valve port formed by this solution is more narrow, and the effect of changing the flow state and lowering the local pressure drop flow rate is better.
  • the cage presses the second portion of the guard ring against the valve seat to secure the guard ring.
  • the second portion of the guard ring is half pressed against the lower end of the cage, in the same manner as in the second embodiment.
  • the cage can press the second portion of the protection ring integrally on the valve seat in the same manner as described in Embodiment 3.
  • the second portion of the protection ring may also be recessed toward the side of the valve seat.
  • the cage may press the protection ring against the valve seat from the side. on.
  • the protection ring may be integrally formed with the valve seat or integrally formed with the valve cage as long as the first flange of the protection ring covers the vulnerable area of the sealing gasket to avoid the sealing gasket being protected Loss can be.
  • FIG. 12 shows a partial cross-sectional view of the protective assembly 80 of Embodiment 8, the protective assembly 80 including a valve port 81, a valve seat 82, a gasket 83 embedded in the valve seat 82, and a gasket 83 for protecting the gasket 83.
  • Protection ring 84 In this embodiment, the protection ring 84 is riveted to the valve seat 82. The edge of the upper surface of the valve seat 82 is provided with a riveted edge 821.
  • the riveted edge 821 is annular, and the protection ring is 84 riveted to the valve seat 82, the end of the guard ring 84 being the second flange of the embodiment 1 preferred embodiment, the second flange will cover the vulnerable area of the gasket 83, avoiding The gasket is damaged.
  • the second flange has a rectangular cross section in the vertical direction and has a certain height.
  • a double valve port can be formed, and the second valve port formed can be further formed. The slender, enhanced second port "reduces the local pressure difference and flow rate".
  • the end of the protection ring that is, the cross section of the second flange in the vertical direction may also be a right-angled trapezoid or a triangle.
  • the apex angle of the end of the protective ring in contact with the gasket may be designed to be rounded or chamfered to protect the gasket from damage when squeezed by the cutting edge.
  • FIG. 13 shows a partial cross-sectional view of a valve seat gasket protection assembly 90 of embodiment 9, including a valve port 91, a valve seat 92, a gasket 93 embedded in the valve seat 92, and
  • the end of the protective ring is the second flange in the first embodiment of the preferred embodiment, the second flange covering the vulnerable area of the gasket 93 to protect Seal.
  • the guard ring 94 can be secured to the valve seat by fasteners 95.
  • FIG. 14 is a perspective view of the protective ring 94.
  • the protective ring 94 is provided with a plurality of connecting holes 96. As shown in FIG. 13 and FIG.
  • the valve seat 92 is provided with a corresponding protective ring. Connection hole.
  • the protection ring is fixed to the valve seat by a fastener and a connecting hole.
  • the end of the protection ring covers the vulnerable area of the sealing gasket, and on the other hand, the protection ring can also The cutting edge forms a second valve port, which changes the local flow state of the medium, reduces the local pressure difference and the flow rate, and can effectively extend the life of the gasket.
  • the cross section of the end of the protection ring in the vertical direction may also be a right angle trapezoid or a triangle.
  • the corner of the end of the protective ring that is in contact with the gasket may be designed to be rounded or chamfered.
  • a seat gasket protection assembly according to any of the preceding embodiments, wherein the vulnerable regions of the gasket are located on the low pressure side of the medium, i.e., the outlet side of the seat gasket protection assembly, when the high pressure medium is from a higher pressure inlet
  • the high-pressure medium will flow from the high-pressure side to the low-pressure side, and expand explosively on the low-pressure side, at which time the metal material of the protection ring covers the gasket.
  • the damaged area is excellent in protecting the gasket and avoiding the explosion of high-flow low-temperature gas and damage.
  • the cross section of the valve opening of the valve seat seal protection assembly may be trapezoidal in a vertical direction, preferably the cutting edge is vertical
  • the cross section in the direction is a right-angled trapezoid, as shown in Fig. 15, the right-angled side of the cutting edge section is located on the side close to the first flange or the second flange of the guard ring.
  • the cutting edge will be trapped in the sealing pad, and the side of the cutting edge near the vulnerable area is a right angle side, which can prevent the cutting edge from being closed when the valve port is closed.
  • the first flange or the second flange of the guard ring creates friction.
  • the apex angle of the cutting edge can be designed to be rounded or chamfered to avoid damage to the gasket.
  • the utility model also provides a pressure regulator, as shown in FIG. 16, the pressure regulator comprises the valve seat gasket protection component according to any one of the above embodiments, and the valve seat gasket protection component of the utility model
  • the gasket can be protected from failure by the flushing of the high-pressure medium, so the regulator provided with the above-mentioned seat gasket protection component can have a better gasket service life under high pressure differential conditions.

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Abstract

一种阀座密封垫的保护组件及调压器。该保护组件包括：阀口（21）和阀座（22），所述阀座包括密封垫（23）；所述密封垫（23）包括位于所述阀口（21）出口侧的易损区域，所述保护组件包括部分覆盖在所述密封垫（23）的易损区域的保护圈（24）。由于所述保护圈（24）部分覆盖在所述密封垫（23）的易损区域上，在具有高压差的工况下，该保护组件可避免密封垫（23）在长期的高压流体介质冲刷下受损，从而导致内密封失效。

Description

阀座密封垫的保护组件及调压器 技术领域
本实用新型涉及调压器领域，尤其是一种阀座密封垫的保护组件及调压器。
背景技术
现有的需要严密关断的调压器及阀中，大多数是靠一个软密封垫配合金属阀口来实现关闭密封的。如图1所示，调压器1的阀座12上设置有密封垫13，密封垫13的材料多数为橡胶。一般情况下，橡胶等软密封材质难以承受高压高流速介质的冲刷，尤其，在高压差气体介质的工况下，气体介质在减压后，温度会比在高压情况下降低很多，在低温条件下，橡胶的弹性会变差，比较容易损坏。在图1中，当阀口开度较小，且进出口压差较大时，高压介质通过阀口11与密封垫13形成的狭窄缝隙后，进入一个相对很大的空间，介质急剧减压，爆炸式膨胀，流速急剧增大，同时温度急剧降低。密封垫13位于出口侧的部分在高流速低温介质的冲刷下迅速受损失效。由于高压差引起的高速低温介质冲刷是造成密封垫密封失效的根本原因，限制调压器的进出口压差可以显著提高密封垫的使用寿命。但对一些高压阀门或调压器，其设计就需要用于高压差的工况，因此，需要采取其他措施保护密封垫。
实用新型内容
本实用新型提供了一种阀座密封垫保护组件及调压器，解决了上述存在的密封垫由于受损，从而导致密封失效的问题。
所述保护组件，包括阀口和阀座，所述阀座包括密封垫；所述密封垫包括位于所述阀口出口侧的易损区域，所述保护组件还包括保护圈，其中，所述保护圈部分覆盖在所述密封垫的易损区域上。
所述保护组件的所述保护圈的第一部分上设置有第一凸缘，其中，所述第一部分位于所述阀座的表面。
上述保护组件的所述第一凸缘在竖直方向的截面为梯形、矩形或三角形。
上述保护组件的所述第一凸缘在竖直方向的截面中对应于所述第一凸缘与所述密封垫接触部分的角为圆角或倒角。
上述保护组件还包括第一阀笼，其中，所述第一阀笼通过所述保护圈的第二部分将所述保护圈固定在所述阀座上。
上述保护组件的所述第二部分在竖直方向上的截面为L形状或倒L形状，所述第二部分的截面包括竖直方向上的第一端部和水平方向上的第二端部，所述第一端部与所述第一部分相连接，所述第二端部与所述第一阀笼或所述阀座接触。
上述保护组件的所述第二部分在竖直方向上的截面为L形状，所述第一阀笼与所述保护圈接触的部分设置有第一凹槽，所述第二端部嵌入在所述第一凹槽里；
所述第二部分在竖直方向上的截面为倒L形状，所述阀座与所述第二部分接触的部分上设置有第二凹槽，所述第二端部嵌入在所述第二凹槽里。
上述保护组件的所述保护圈与所述阀座一体成型；或，
上述保护组件包括第二阀笼，所述保护圈与所述第二阀笼一体成型。
上述保护组件的所述保护圈通过紧固件固定在所述阀座上。
上述保护组件的所述保护圈设置有第二凸缘，且所述保护圈位于所述阀座的表面。
上述保护组件的所述第二凸缘在竖直方向的截面为梯形，矩形或三角形。
上述保护组件的所述截面中对应于所述第二凸缘与所述密封垫接触部分的角为圆角或倒角。
上述保护组件的所述阀口设置有刃口，其中，所述刃口在竖直方向上的截面为直角梯形，且所述直角梯形的直角边位于所述易损区域侧。
本实用新型还提供了一种调压器，包括上述的任一保护组件。可在高压差高流速的工况下，延长密封垫的使用寿命。
本实用新型的阀座密封垫的保护组件以及调压器通过将保护圈部分覆盖在所述密封垫的易损区域，可以改变高压差、高流速区域内介质的流动状态，降低局部压差和流速，同时覆盖易损坏区域，可有效延长密封垫的寿命，防止其损坏。
附图说明
图1是现有技术中的一种调压器的示意图及其局部示意图；
图2是本实用新型实施例之一的保护组件的局部示意图；
图3是图2所示的阀座密封垫保护组件的阀笼的立体图；
图4是本实用新型实施例之一的保护组件的局部示意图；
图5是本实用新型实施例之一的保护组件的局部示意图；
图6是图5所示的保护组件的保护圈的立体图；
图7是图5所示保护组件的阀座以及密封垫的截面图；
图8是本实用新型实施例之一的保护组件的局部示意图；
图9是本实用新型实施例之一的保护组件的局部示意图；
图10是图9所示保护组件的阀笼的截面图；
图11是本实用新型实施例之一的保护组件的局部示意图；
图12是本实用新型实施例之一的保护组件的局部示意图；
图13是本实用新型实施例之一的保护组件的局部示意图；
图14是图13所示保护组件的保护圈的立体图；
图15是本实用新型实施例之一的保护组件的局部示意图；
图16是本实用新型实施例之一的调压器及其局部示意图。
具体实施方式
以下结合附图以及具体实施例对本实用新型的技术方案做进一步说明。
实施例1
本实用新型的提供了一种阀座密封垫的保护组件，包括阀口和阀座，所述阀座包括密封垫，所述密封垫包括位于所述阀口的出口侧的易损区域，即高压差高流速承受区域， 所述保护组件还包括部分覆盖在所述易损区域的保护圈。当阀口处于关闭状态时，所述阀口与所述阀座上的密封垫接触，用以严密关断。当所述阀口处于初始开启阶段时，阀口开度较小，进出口压差较大，高压高流速的介质通过阀口与密封垫形成的狭窄缝隙后，进入一个相对很大的空间，介质急剧减压，爆炸式膨胀，流速急剧增大，同时温度急剧降低。此时，所述密封垫的位于阀口的出口侧的易损区域将承受高压差以及高流速，由于所述保护圈部分覆盖在密封垫的易损区域，同时保护圈与刃口形成的第二阀口可以改变介质的局部流动状态，降低局部压差和流速，延长密封垫的寿命。
本实用新型实施例的保护组件的第一部分上设置有第一凸缘，所述第一部分位于所述阀座的表面，当所述阀座如附图中所示的方向放置，则所述保护圈的第一部分位于所述阀座的上表面，应该理解的是，当调压器或阀门的所述阀座倒置时，所述保护组件则位于所述阀座的下表面。
所述第一凸缘在竖直方向上的截面为梯形，矩形或三角形。由于所述刃口与所述保护圈的第一凸缘之间具有竖直方向的狭缝，形成类似于双阀口的结构，可改变局部流动状态，降低密封垫易损坏区域局部的压降和流速，从而改变介质流出阀口与密封垫之间的间隙后的流动状态，降低密封垫易损区域的局部压降和流速，以免高速低温流体冲刷损坏密封垫。
优选地，所述保护圈的第一凸缘的截面中对应于所述第一凸缘与密封垫接触部分的角为圆角或倒角，当阀口关闭时，柔软的密封垫将会从所述第一凸缘与密封垫接触部分的角处被挤出，圆角或倒角的设计可避免密封垫在被挤出时被割破。可选地，所述第一凸缘上与所述密封垫不接触的角也可为圆角或倒角，可用于平缓气流。
所述保护圈具有多种安装固定方式；
所述保护组件包括第一阀笼，所述保护圈包括第二部分，所述第一阀笼通过所述第二部分将所述保护圈固定在所述阀座上。
具体地，所述第二部分在竖直方向上的截面为L形状或倒L形状，所述第二部分包括竖直方向上的第一端部和水平方向上的第二端部，所述第一端部与所述第一部分相连接，所述第二端部与所述第一阀笼或所述阀座接触。
当所述第二部分在竖直方向上的截面为L形状时，所述第一阀笼与所述保护圈接触的部分设置有第一凹槽，所述第二端部嵌入在所述第一凹槽里；
当所述第二部分为在竖直方向上的截面为倒L形状，所述阀座与所述第二部分接触的部分上设置有第二凹槽，所述第二端部嵌入在所述第二凹槽里。
所述保护圈还可与所述阀座一体成型；
所述保护组件还可包括第二阀笼，所述保护圈与所述第二阀笼一体成型。
另外，所述保护圈还可铆接在所述阀座上，或通过紧固件固定在所述阀座上。
可选地，所述保护圈设置还可设置有第二凸缘，所述保护圈位于所述阀座的上表面，所述第二凸缘在竖直方向上的截面为梯形，矩形或三角形。所述第二凸缘与所述密封垫接触部分的角为圆角或倒角。
本实用新型的所述保护组件的阀口设置有刃口，所述刃口在竖直方向上的截面为直角梯形，所述直角梯形的直角边位于所述易损区域侧。可防止阀口关闭时，所述刃口与所述保护圈接触产生摩擦。
实施例2
图2示出了本实用新型实施例的保护组件20的局部截面图，包括阀口21，阀座22，位于阀座22上的密封垫23，以及用于保护密封垫23的保护圈24。所述保护组件20还包括与阀座22配合的阀笼25，本实施例的阀笼25可以是上述实施例的第一阀笼的优选实施方式。
图3示出了阀笼25的立体图，当处于装配状态时，阀笼25位于阀座22上，并紧压所述阀座22。本实施例的所述保护圈24包括第一部分241和第二部分242，所述第一部分241上设有第一凸缘243，所述第一凸缘243部分覆盖在所述密封垫23的易损区域231上，所述第二部分242用于与所述阀座22以及阀笼25配合以固定保护圈24。
所述阀口21还包括刃口211，当阀口处于关闭状态时，所述阀口21的刃口211与所述阀座22上的密封垫23接触，由于密封垫23材质较软，在关闭状态时，所述刃口会内嵌在所述密封垫23中。
当所述阀口处于初始开启阶段时，此时阀口开度较小，若进出口压差较大，那么高压介质通过阀口与密封垫形成的狭窄缝隙后，将进入一个相对很大的空间，工作介质急剧减压，爆炸式膨胀，流速急剧增大，同时温度急剧降低。此时，所述保护圈部分覆盖在密封垫的易损区域，同时所述保护圈还可与刃口形成第二阀口，改变了介质的局部流动状态，降低了局部压差和流速，可有效延长密封垫的寿命。
所述保护圈24的第一凸缘243靠近所述阀口21的刃口211，但不与其接触。所述第一部分241的第一凸缘243的在竖直方向上的截面为直角梯形，位于阀口出口腔的一侧，当所述阀口开度较小时，高压介质首先从水平方向的狭窄缝隙进入出口腔，由于保护圈24的第一部分241的第一凸缘位于刃口的外侧，高压介质碰到第一凸缘后转向上方流动，改变了原来设计中的局部流动状态，降低了原密封垫易损区域的局部压降和流速，形成了第二阀口；同时部分覆盖阀座上的密封垫，防止密封垫承受高压差高流速而损坏失效。
可选地，所述保护圈的第一凸缘的在竖直方向上的截面还可以是矩形，截面为矩形的第一凸缘将具有一定的高度，可使形成的第二阀口更加细长，加强了第二阀口“降低局部压差和流速”的作用。
可选地，所述保护圈的第一凸缘的在竖直方向上的截面还可以是三角形。
所述保护圈24的第二部分242包括竖直方向上的第一端部以及水平方向上的第二端部，其在竖直方向上的截面为“L”形状，所述第一端部与所述第一部分241连接，此时所述阀笼与所述第二部分接触的部分设置有第一凹槽，所述第二端部嵌入在所述第一凹槽里，当所述保护组件处于装配状态时，所述阀笼可通过第二部分所述保护圈压紧固定在阀座上。优选地，当所述第一部分的第一凸缘的在竖直方向上的截面为矩形或梯形时，包括上顶角以及与所述密封垫接触部分的角即下顶角，所述下顶角为圆角或倒角，用于保护密封垫在受到刃口挤压时不被损坏。可选地，所述上顶角也可为圆角或倒角，用于平缓气流。当所述第一部分的第一凸缘在竖直方向上的截面为三角形时，其与密封垫接触的角同样可设计成圆角或倒角，在竖直方向上的截面为三角形、梯形或矩形的第一凸缘可与阀口的刃口部分形成第二阀口，从而改变介质流出阀口与密封垫之间间隙后的流动状态，降低密封垫易损区域的局部压降和流速，避免密封垫损坏。
本实施例的优点在于：一方面，所述保护圈的第一凸缘覆盖在密封垫23的易损区 域，避免密封垫受到严重的直接冲刷；另一方面，所述保护圈的第一凸缘与所述刃口形成的第二阀口，改变了介质的局部流动状态，降低了局部压差和流速，可有效延长密封垫的寿命，避免高压差高流速介质对密封垫造成损坏。本实施例的保护圈的固定方式是通过阀笼将其部分紧压在阀座上。
实施例3
图4示出了实施例3的阀座密封垫保护组件30的局部截面图，同实施例1一样，所述保护组件30包括阀口31，阀座32，位于阀座32上的密封垫33，用于保护密封垫33的保护圈34，以及与阀座32配合的阀笼35，本实施例的阀笼可以是实施例1的第一阀笼的优选实施方式。
所述保护圈34同样具有第一部分341以及第二部分342，所述第一部分341部分覆盖在所述密封垫33的易损区域331，所述易损区域将承受流体介质的高压差和高流速。与所述第一部分341一体成型的所述第二部分342具有竖直方向上为“L”形状的截面，所述第二部分的水平方向上的部分长度较长，并被所述阀笼整体紧压在阀座上固定。
本实施例的保护圈34的第一部分341包括第一凸缘，所述第一凸缘在竖直方向上的截面为直角梯形，包括上顶角以及与所述密封垫接触的部分的角即下顶角，优选地，所述下顶角为圆角或倒角，用于保护密封垫在受到刃口挤压时不被损坏。可选地，所述上顶角也可为圆角或倒角，用于平缓气流。
所述保护圈可与阀口的刃口部分形成第二阀口，从而改变介质流出阀口与密封垫之间间隙后的流动状态，降低密封垫易损区域的局部压降和流速，避免密封垫损坏。
可选的，所述保护圈的第一凸缘的在竖直方向上的截面还可以是矩形，截面为矩形的第一凸缘具有一定的高度，可使形成的第二阀口更加细长，加强了第二阀口“降低局部压差和流速”的作用。
可选地，所述保护圈的第一凸缘的在竖直方向上的截面还可以是三角形。
与实施例2不同之处在于保护圈34的固定方式，本实施例的阀笼35上没有设置凹槽，所述阀笼的底部直接紧压在竖直方向的截面为“L”形状的第二部分上。该实施例的阀座密封垫保护组件无需在阀笼上设置凹槽，即可固定所述保护圈34。
本实施例的优点在于：一方面，所述保护圈的第一部分覆盖在密封垫33的易损区域，避免密封垫受到严重的直接冲刷；另一方面，所述保护圈的第一凸缘与所述刃口形成的第二阀口，改变了介质的局部流动状态，降低了局部压差和流速，可有效延长密封垫的寿命，避免高压差高流速介质对密封垫造成损坏。本实施例的保护圈的固定方式是通过阀笼将保护圈的第二部分的水平方向的部分整体紧压在阀座上。
实施例4
图5示出了实施例4的保护组件40的局部截面图，同上述实施例一样，本实施例的阀座密封垫保护组件40包括阀口41，阀座42，嵌在阀座42上的密封垫43，用于保护密封垫43的保护圈44，以及与阀座42配合的阀笼45，本实施例的阀笼可以是实施例1的第一阀笼的优选实施方式。
同上述实施例一样，所述保护圈44具有第一部分以及第二部分，所述第一部分覆盖在所述密封垫的易损区域，所述第一部分的第一凸缘具有在竖直方向为直角梯形的截面，还包括上顶角以及与所述密封垫接触部分的角即下顶角，优选地，所述下顶角为圆角或 倒角，当阀口关闭时，柔软的密封垫将会从下顶角处被挤出，圆角或倒角的设计可避免当刃口将密封垫挤出时密封垫被割破。可选地，所述上顶角也可为圆角或倒角，用于平缓气流。
可选的，所述保护圈的第一凸缘的在竖直方向上的截面还可以是矩形，截面为矩形的第一凸缘具有一定的高度，可使形成的第二阀口更加细长，加强了第二阀口“降低局部压差和流速”的作用。
可选地，所述保护圈的第一凸缘的在竖直方向上的截面还可以是三角形。
与上述实施例的不同之处在于，所述保护圈44的第二部分在竖直方向上的截面为倒“L”形状，所述阀座42的侧壁上设有第二凹槽，所述第二部分的水平方向的第二端部443嵌入到所述阀座42的第二凹槽内。当处于装配状态时，所述阀笼45从侧面上将所述保护圈44紧压在阀座42上。
图6示出了本实施例的保护圈44的立体图，所述保护圈44由两个半环构成，可分别套接在如图7所示的阀座42上，形成一个环状的保护圈，所述柱状的阀笼套接在阀座42上，并位于保护圈44外侧，可从侧面将所述保护圈44紧固在阀座42上。
可选地，所述保护圈还可以包括多个圆弧段，该多个圆弧段可拼接成整圆即可。
本实施例的优点在于：一方面，所述保护圈的第一部分覆盖在密封垫43的易损区域，避免密封垫43受到严重的直接冲刷；另一方面，所述保护圈44的第一凸缘与所述刃口形成的第二阀口，改变了介质的局部流动状态，降低了局部压差和流速，可有效延长密封垫的寿命，避免高压差高流速介质对密封垫造成损坏。本实施例的保护圈的固定方式是通过阀笼将所述保护圈从侧面紧压在阀座上。
实施例5
图8示出了实施例5的一种阀座密封垫保护组件50的局部截面图，本实施例的保护组件50包括阀口51，阀座52，以及用于保护密封垫53的保护圈54，所述阀座52上设有第三凹槽521，其中，所述第三凹槽521用于容纳所述密封垫53，本实施例的保护圈54与所述阀座52一体成型，同时所述保护圈54的第一凸缘覆盖在所述阀座52的用于容纳密封垫53的第三凹槽521上，同样可保护密封垫53的易损区域。
上述实施例一样，所述保护圈54的第一凸缘在竖直方向上的截面为直角梯形，其与所述密封垫接触部分的角即下顶角为圆角或倒角，在当阀口关闭时，柔软的密封垫将会从下顶角处被挤出，圆角或倒角的设计可避免当刃口将密封垫挤出时密封垫被割破。可选地，所述上顶角也可为圆角或倒角，用于平缓气流。
可选的，所述保护圈的第一凸缘在竖直方向上的截面还可以是矩形，截面为矩形的第一凸缘具有一定的高度，可使形成的第二阀口更加细长，加强了第二阀口“降低局部压差和流速”的作用。
可选地，所述保护圈的第一凸缘在竖直方向上的截面还可以是三角形。
实施例6
图9示出了实施例6的保护组件60的局部截面图，本实施例的保护组件60包括阀口61，阀座62，位于阀座62内的密封垫63，以及具有保护圈64的阀笼65，本实施例的阀笼可以是实施例1的第二阀笼的优选地实施方式，所述保护圈64包括第二凸缘66。
图10示出了所述阀笼65的截面图，所述保护圈64是与所述阀笼65一体成型，并在所述阀笼的内侧下端形成凸缘；当处于装配状态时，见图9，所述阀笼上的保护圈64部分 覆盖在所述密封垫的易损区域，以保护密封垫承受高压差高流速造成损坏。
同上述实施例一样，所述保护圈64的第二凸缘66在竖直方向上的截面为直角梯形，其与密封垫接触部分的角即下顶角为圆角或倒角，在当阀口关闭时，柔软的密封垫将会从下顶角处被挤出，圆角或倒角的设计可避免当刃口将密封垫挤出时密封垫被割破。可选地，与所述密封垫不接触的上顶角也可为圆角或倒角，用于平缓气流。
可选的，所述保护圈的第二凸缘在竖直方向上的截面还可以是矩形，截面为矩形的第二凸缘具有一定的高度，可使形成的第二阀口更加细长，加强了第二阀口“降低局部压差和流速”的作用。
可选地，所述保护圈的第二凸缘在竖直方向上的截面还可以是三角形。
实施例7
图11示出了实施例7的一种阀座密封垫保护组件70的局部截面图，同实施例2一样，所述阀座密封垫保护组件70包括阀口71，阀座72，嵌在阀座72里的密封垫73，用于保护密封垫73的保护圈74，以及与阀座72配合的阀笼75，本实施例的阀笼可以是实施例1的第一阀笼的优选地实施方式，。
所述保护圈74同样具有第一部分以及第二部分，所述第一部分的第一凸缘覆盖在所述密封垫73的易损区域，与所述第一部分一体成型的所述第二部分具有竖直方向上为“L”形状的截面，所述第二部分的水平方向的第二端部被所述阀笼紧压在阀座上固定。
与实施例2的不同之处在于，本实施例的保护圈74的第一部分的第一凸缘具有竖直方向上为矩形的截面，优选地，其与密封垫接触的角即下顶角具有圆角或倒角设计，当阀口关闭时，柔软的密封垫将会从下顶角处被挤出，圆角或倒角的设计可避免密封垫在被挤出时被割破。
本实施例的所述保护圈的第一凸缘具有一定的高度，一方面，所述保护圈的第一凸缘覆盖在所述密封垫上，可保护密封垫避免受到高压损坏，另一方面，由于保护圈的第一凸缘高度略高，这种方案形成的第二阀口更加狭长，其改变流动状态、降低局部压降流速的效果更好。
所述阀笼将所述保护圈的第二部分紧压在阀座上以固定所述保护圈。在本实施例中，所述保护圈的第二部分半紧压在阀笼下端，同实施例2的固定方式一样。
可选地，所述阀笼可将保护圈第二部分整体紧压在阀座上，同实施例3所述的固定方式相同。
可选地，所述保护圈的第二部分还可向阀座的侧方凹进，同实施例4的固定方式一样，所述阀笼可从侧面上将所述保护圈紧压在阀座上。
可选地，所述保护圈还可与所述阀座一体成型，或与所述阀笼一体成型，只要保护圈的第一凸缘覆盖在所述密封垫的易损区域，避免密封垫受损即可。
实施例8
图12示出了实施例8的保护组件80的局部截面图，所述保护组件80包括阀口81，阀座82，嵌在阀座82里的密封垫83，以及用于保护密封垫83的保护圈84。本实施例中，所述保护圈84铆接在所述阀座82上，所述阀座82上表面的的边缘处设有铆接边821，所述铆接边821呈环状，将所述保护圈84铆接在所述阀座82上，所述保护圈84的端部即实施例1中的第二凸缘优选实施方式，该第二凸缘将覆盖所述密封垫83的易损区域，避免 密封垫受损，另一方面，所述第二凸缘在竖直方向上的截面为矩形，具有一定的高度，同实施例7一样可形成双阀口，可使形成的第二阀口更加细长，加强了第二阀口“降低局部压差和流速”的作用。
可选地，所述保护圈的端部即所述第二凸缘在竖直方向上的截面还可以为直角梯形或三角形。
可选地，所述保护圈的端部的与密封垫接触的顶角可设计成圆角或倒角，可保护密封垫在受到刃口挤压时不被损坏。
实施例9
图13示出了实施例9的一种阀座密封垫保护组件90的局部截面图，所述保护组件90包括阀口91，阀座92，嵌在阀座92里的密封垫93，以及用于保护密封垫93的保护圈94，所述保护圈的端部即实施例1中的第二凸缘优选实施方式，该第二凸缘覆盖在所述密封垫93的易损区域，以保护密封垫。在本实施例中，所述保护圈94可以通过紧固件95固定在所述阀座上。图14示出了所述保护圈94的立体图，所述保护圈上94设有多个连接孔96，结合图13图14所示，所述阀座92上设有与所述保护圈向对应的连接孔。所述保护圈通过紧固件以及连接孔被固定在所述阀座上，一方面，所述保护圈的端部覆盖所述密封垫的易损区域，另一方面所述保护圈还可与刃口形成第二阀口，改变了介质的局部流动状态，降低了局部压差和流速，可有效延长密封垫的寿命。
可选地，所述保护圈的端部在竖直方向上的截面还可以是直角梯形或三角形。
优选地，所述保护圈的端部的与所述密封垫接触的的角可设计成圆角或倒角。
根据上述的任一实施例的阀座密封垫保护组件，所述密封垫的易损区域均位于介质的低压侧，即阀座密封垫保护组件的出口侧，当高压介质从压力较高的入口侧进入压力较低的出口侧时，高压介质将从所述高压侧涌入到低压侧，并在低压侧爆炸式膨胀，此时所述保护圈的的金属材质覆盖在所述密封垫的易损区域，极好地保护了密封垫，避免高流速低温气体的爆炸式冲刷而受损。
根据上述的任一实施例的阀座密封垫保护组件，所述阀座密封垫保护组件的阀口的刃口在竖直方向上的截面可以是梯形，优选地，所述刃口在竖直方向上的截面是直角梯形，如图15所示，所述刃口截面的直角边位于靠近所述保护圈的第一凸缘或第二凸缘的一侧。当所述阀口关闭时，所述刃口将内陷在所述密封垫中，刃口的靠近易损区域的一侧为直角边，可避免所述刃口在阀口关断时，与所述保护圈的第一凸缘或第二凸缘产生摩擦。优选地，所述刃口的顶角均可设计成圆角或倒角，避免损坏密封垫。
实施例10
本实用新型还提供了一种调压器，图16所示，所述调压器包括上述实施例中任一所述的阀座密封垫保护组件，由于本实用新型的阀座密封垫保护组件可以保护其密封垫避免受到高压介质的冲刷而失效，所以设置有上述阀座密封垫保护组件的调压器可以在高压差的工况下具有较好的密封垫使用寿命。
需要说明的是，以上所述仅为本实用新型的较佳实施例而已，并非用于限定本实用新型的保护范围。凡在本实用新型的精神和原则之内所做的任何修改、等同替换、改进等，均包含在本实用新型的保护范围内。

Claims (14)

  1. 一种阀座密封垫的保护组件，包括阀口和阀座，所述阀座包括密封垫；所述密封垫包括位于所述阀口出口侧的易损区域，其特征在于，所述保护组件还包括保护圈，其中，所述保护圈部分覆盖在所述密封垫的易损区域上。
  2. 根据权利要求1所述的保护组件，其特征在于，所述保护圈的第一部分上设置有第一凸缘，其中，所述第一部分位于所述阀座的表面。
  3. 根据权利要求2所述的保护组件，其特征在于，所述第一凸缘在竖直方向的截面为梯形、矩形或三角形。
  4. 根据权利要求2所述的保护组件，其特征在于，所述第一凸缘在竖直方向的截面中对应于所述第一凸缘与所述密封垫接触部分的角为圆角或倒角。
  5. 根据权利要求2-4任一所述的保护组件，其特征在于，所述保护组件还包括第一阀笼，其中，所述第一阀笼通过所述保护圈的第二部分将所述保护圈固定在所述阀座上。
  6. 根据权利要求5所述的保护组件，其特征在于，所述第二部分在竖直方向上的截面为L形状或倒L形状，所述第二部分的截面包括竖直方向上的第一端部和水平方向上的第二端部，所述第一端部与所述第一部分相连接，所述第二端部与所述第一阀笼或所述阀座接触。
  7. 根据权利要求6所述的保护组件，其特征在于，
    所述第二部分在竖直方向上的截面为L形状，所述第一阀笼与所述保护圈接触的部分设置有第一凹槽，所述第二端部嵌入在所述第一凹槽里；
    所述第二部分在竖直方向上的截面为倒L形状，所述阀座与所述第二部分接触的部分上设置有第二凹槽，所述第二端部嵌入在所述第二凹槽里。
  8. 根据权利要求1所述的保护组件，其特征在于，
    所述保护圈与所述阀座一体成型；或，
    所述保护组件包括第二阀笼，所述保护圈与所述第二阀笼一体成型。
  9. 根据权利要求1所述的保护组件，其特征在于，所述保护圈通过紧固件固定在所述阀座上。
  10. 根据权利要求8或9所述的保护组件，其特征在于，所述保护圈设置有第二凸缘，且所述保护圈位于所述阀座的表面。
  11. 根据权利要求10所述的保护组件，其特征在于，所述第二凸缘在竖直方向的截面为梯形，矩形或三角形。
  12. 根据权利要求11所述的保护组件，其特征在于，所述截面中对应于所述第二凸缘与所述密封垫接触部分的角为圆角或倒角。
  13. 根据权利要求1-4，6-9，11，12中任一所述的保护组件，其特征在于，所述阀口设置有刃口，其中，所述刃口在竖直方向上的截面为直角梯形，且所述直角梯形的直角边位于所述易损区域侧。
  14. 一种调压器，其特征在于，包括权利要求1-13任一所述的阀座密封垫的保护组件。
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