CN112984135B - Soft sealing structure and forming method - Google Patents
Soft sealing structure and forming method Download PDFInfo
- Publication number
- CN112984135B CN112984135B CN202110187784.3A CN202110187784A CN112984135B CN 112984135 B CN112984135 B CN 112984135B CN 202110187784 A CN202110187784 A CN 202110187784A CN 112984135 B CN112984135 B CN 112984135B
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- Prior art keywords
- valve clack
- fluoroplastic
- threaded holes
- hole
- sleeve
- Prior art date
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- 238000007789 sealing Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 12
- 229920002313 fluoropolymer Polymers 0.000 claims abstract description 33
- 239000000843 powder Substances 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000001746 injection moulding Methods 0.000 claims abstract description 5
- 238000002844 melting Methods 0.000 claims abstract description 5
- 230000008018 melting Effects 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000000155 melt Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- -1 specifically Polymers 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- F16K25/00—Details relating to contact between valve members and seats
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Gasket Seals (AREA)
Abstract
The utility model discloses a soft sealing structure, which relates to the technical field of valves and comprises a valve clack, a sealing ring, a sleeve and a cover plate. The utility model also discloses a forming method of the soft sealing structure, which comprises the following steps: step 1: firstly, pouring fluoroplastic powder into a round table hole, a first threaded hole, a second threaded hole and a U-shaped ring of a valve clack; step 2: repeatedly extruding for multiple times by a hydraulic press, and finally performing injection molding; step 3: and finally, placing the pressed fluoroplastic powder and the valve clack into a heat treatment furnace together for melting and solidifying the fluoroplastic, and after the fluoroplastic powder is melted at a certain temperature, forming in a round table hole, a first threaded hole, a second threaded hole and a U-shaped ring of the valve clack, and solidifying and forming the fluoroplastic after cooling the fluoroplastic with the heat treatment furnace. The utility model has the technical effects that the sealing ring and the valve clack are tightly attached, the structure is compact, and the valve clack is not easy to fall off.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to a soft sealing structure and a forming method.
Background
A part of soft structure is that sealing washer and valve clack adopt bolted connection fixed, because valve clack is frequently opened and close, receive the scouring of medium simultaneously, lead to the bolt of connection to become flexible often to make the sealing washer drop, the valve loses sealed effect. Moreover, the sealing ring can expand with heat and contract with cold under the influence of temperature, so that the pretightening force of the bolt is reduced, and the sealing ring is not tightly pressed to leak.
In the other part of the soft sealing structure, a dovetail groove is formed in the valve clack, and the sealing ring is tightly matched with the dovetail groove in an injection molding mode, however, the sealing ring fixed in the dovetail groove is concentrated in sharp corners at two sides of the groove when being subjected to flushing of a medium, so that the sealing ring is easy to fall off.
Chinese utility model patent, publication No.: CN103062419a, bulletin day: 2013.04.24; the utility model discloses a forged steel refrigeration valve, be equipped with U type spout and lower U type spout on the valve clack, the valve clack and the cooperation of valve rod of being convenient for, its shortcoming lies in that valve clack and valve body contact are inseparable, and seal reliability is low.
Chinese utility model patent, publication No.: CN204459183U, bulletin day: 2015.07.08; the utility model discloses a special bellows stop valve of high performance double seal chlorine adopts hard soft double seal structure between valve clack and the valve body seal seat, and its inlayer hard seal pair has the wearability, prevents impurity damage seal pair, and outer soft seal pair cooperates with the valve body seal seat, and its is characterized in that, outer soft seal pair only cooperates through recess and valve body seal seat, leads to the contact inseparable, and seal reliability is low.
Disclosure of Invention
1. Technical problem to be solved by the utility model
Aiming at the technical problem that the sealing ring and the valve clack are easy to fall off when connected, the utility model provides a soft sealing structure and a forming method, which enable the sealing ring and the valve clack to be closely attached, have compact structure and are not easy to fall off.
2. Technical proposal
In order to solve the problems, the technical scheme provided by the utility model is as follows:
a soft sealing structure comprises a valve clack, a sealing ring, a sleeve and a cover plate;
the valve clack comprises a first surface, a second surface and a third surface, a circular truncated cone hole is formed in the center of the first surface, the circular truncated cone hole comprises a first circle and a second circle, the diameter of the first circle is smaller than that of the second circle, a plurality of first threaded holes are uniformly distributed in the edge of the first surface along the circumference, a plurality of second threaded holes are uniformly distributed in the edge of the second surface along the circumference, and a U-shaped ring is formed between the second surface and the third surface;
the sleeve is sleeved on the outer side of the valve clack, one end of the valve clack is matched with the sealing ring, the sealing ring is matched with the round platform hole, the first threaded hole, the second threaded hole and the U-shaped ring, the outer side of the sealing ring is matched with the inner side of the sleeve, the cover plate is detachably connected with the sleeve, one end of the cover plate is matched with the other end of the valve clack, and the other end of the cover plate is matched with the end of the sleeve.
Optionally, the number of the first threaded holes is equal to the number of the second threaded holes.
Optionally, the first threaded holes and the second threaded holes are distributed in a staggered manner, and when the number of the first threaded holes or the second threaded holes is N, the angle between the first threaded holes and the second threaded holes is 180/N.
Optionally, an internal thread is provided at one end inside the sleeve, an external thread is provided at one end of the cover plate, and the cover plate is in threaded connection with the sleeve.
Optionally, the valve clack, the sleeve and the cover plate are all made of metal.
Optionally, the sealing ring is made of fluoroplastic.
A method of forming a soft seal structure, comprising the steps of:
step 1: firstly, pouring fluoroplastic powder into a round table hole, a first threaded hole, a second threaded hole and a U-shaped ring of a valve clack;
step 2: repeatedly extruding for multiple times by a hydraulic press, and finally performing injection molding;
step 3: and finally, placing the pressed fluoroplastic powder and the valve clack into a heat treatment furnace together for melting and solidifying the fluoroplastic, and after the fluoroplastic powder is melted at a certain temperature, forming in a round table hole, a first threaded hole, a second threaded hole and a U-shaped ring of the valve clack, and solidifying and forming the fluoroplastic after cooling the fluoroplastic with the heat treatment furnace.
Alternatively, the fluoroplastic powder melts at a temperature of 360 ℃ to 390 ℃.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects: the sealing ring is tightly attached to the valve clack, the structure is compact, and the valve clack is not easy to fall off.
Drawings
FIG. 1 is an assembled schematic view of a soft seal structure according to an embodiment of the present utility model;
FIG. 2 is a front view of a valve flap according to an embodiment of the present utility model;
fig. 3 is a cross-sectional view of a valve flap according to an embodiment of the present utility model.
In the figure: 1. a valve flap; 11. a first face; 111. round table holes; 1111. a first circle; 1112. a second circle; 112. a first threaded hole; 12. a second face; 121. a second threaded hole; 13. a third face; 14. a U-shaped ring; 2. a seal ring; 3. a sleeve; 4. and a cover plate.
Detailed Description
For a further understanding of the present utility model, the present utility model will be described in detail with reference to the drawings and examples.
The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the utility model are shown in the drawings. The first, second, etc. words are provided for convenience in describing the technical scheme of the present utility model, and have no specific limitation, and are all generic terms, and do not constitute limitation to the technical scheme of the present utility model. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
With the attached drawing 1-
The utility model provides a soft sealing structure which comprises a valve clack 1, a sealing ring 2, a sleeve 3 and a cover plate 4;
the valve clack 1 comprises a first surface 11, a second surface 12 and a third surface 13, wherein a circular truncated cone hole 111 is formed in the center of the first surface 11, the circular truncated cone hole 111 comprises a first circle 1111 and a second circle 1112, the diameter of the first circle 1111 is smaller than that of the second circle 1112, a plurality of first threaded holes 112 are uniformly distributed on the edge of the first surface 11 along the circumference, a plurality of second threaded holes 121 are uniformly distributed on the edge of the second surface 12 along the circumference, and a U-shaped ring 14 is formed between the second surface 12 and the third surface 13;
the valve clack 1 outside is located to sleeve pipe 3 cover, and valve clack 1 one end and sealing washer 2 cooperation, and sealing washer 2 and round platform hole 111, first screw hole 112, second screw hole 121 and U type ring 14 all laminate, and sealing washer 2 outside and the inboard laminating of sleeve pipe 3, apron 4 and sleeve pipe 3 can dismantle the connection, and apron 4 one end and valve clack 1 other end laminating, apron 4 other end and sleeve pipe 3 tip laminating.
Specifically, sealing washer 2 and round platform hole 111, first screw hole 112, second screw hole 121 and U type ring 14 all laminate, adopt multiple composite construction, increase sealing washer 2 and valve clack 1's joint strength, compact structure prevents that sealing washer 2 from coming off, even after plastics age gradually, adhesion strength reduces, owing to adopt multiple composite construction, sealing washer 2 also can not come off. Wherein, the diameter of the first circle 1111 of the circular truncated cone hole 111 is larger than that of the second circle 1112, so that the sealing ring 2 is difficult to fall off from the valve clack 1; the first threaded hole 112 and the second threaded hole 121 comprise spiral lines, so that the sealing ring 2 and the valve clack 1 are tightly matched; the U-shaped ring 14 further increases the fitting strength of the sealing ring 2 and the valve clack 1. The sleeve 3 plays a role in supporting the valve clack 1 and the sealing ring 2, and the cover plate 4 plays a role in supporting the valve clack 1, so that the sealing ring 2 and the valve clack 1 are formed smoothly.
Specifically, in order to ensure that the connection between the sealing ring 2 and the valve clack 1 is stressed uniformly, the number of the first threaded holes 112 is equal to the number of the second threaded holes 121.
Specifically, in order to ensure that the connection part of the sealing ring 2 and the valve clack 1 is uniformly stressed, the first threaded holes 112 and the second threaded holes 121 are distributed in a staggered manner, and when the number of the first threaded holes 112 or the second threaded holes 121 is N, the angle between the first threaded holes 112 and the second threaded holes 121 is 180/N.
Specifically, in order to connect reliably, easy dismounting, the inside one end of sleeve pipe 3 is equipped with the internal thread, and apron 4 one end is equipped with the external screw thread, apron 4 and sleeve pipe 3 threaded connection.
Specifically, in order to adapt to the working environment of high temperature and high pressure, the valve clack 1, the sleeve 3 and the cover plate 4 are all made of metal, specifically cast iron, low carbon steel, stainless steel and other metals.
Specifically, in order to facilitate the melting and solidification of the sealing ring 2, so as to form with the valve clack 1, the sealing ring 2 is made of fluoroplastic, specifically, fluoroplastic such as polytetrafluoroethylene, tetrafluoroethylene-ethylene copolymer, tetrafluoroethylene-hexafluoropropylene copolymer, etc.
The utility model also provides a forming method of the soft sealing structure, which comprises the following steps:
step 1: firstly, pouring fluoroplastic powder into the round table hole 111, the first threaded hole 112, the second threaded hole 121 and the U-shaped ring 14 of the valve clack 1, ensuring that each part of the valve clack 1 is provided with the fluoroplastic powder, and enabling the formed sealing ring 2 to be in close contact with the valve clack 1, wherein the valve clack 1 is positioned in the sleeve 3, so that the fluoroplastic powder is prevented from overflowing.
Step 2: and then, repeatedly extruding for multiple times through a hydraulic press, finally performing injection molding, and exhausting air between fluoroplastic as much as possible, so that the molded sealing ring 2 and the valve clack 1 are in close contact, no bubbles exist, and the service life is prolonged.
Step 3: finally, the pressed fluoroplastic powder and the valve clack 1 are put into a heat treatment furnace together for melting and solidifying the fluoroplastic, and after the fluoroplastic powder is melted at a certain temperature, the fluoroplastic powder is molded in the round platform hole 111, the first threaded hole 112, the second threaded hole 121 and the U-shaped ring 14 of the valve clack 1, and then the fluoroplastic is solidified and molded after being cooled by the heat treatment furnace. Adopts various composite structures, increases the connection strength of the sealing ring 2 and the valve clack 1, has compact structure, prevents the sealing ring 2 from falling off,
in particular, the fluoroplastic powder melts at a temperature of 360℃to 390℃and may specifically be 360℃or 370℃or 390℃or the like.
The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.
Claims (5)
1. A method of forming a soft seal structure, comprising the steps of:
step 1: firstly, pouring fluoroplastic powder into a round table hole, a first threaded hole, a second threaded hole and a U-shaped ring of a valve clack;
step 2: repeatedly extruding for multiple times by a hydraulic press, and finally performing injection molding;
step 3: finally, placing the pressed fluoroplastic powder and the valve clack into a heat treatment furnace together for melting and solidifying the fluoroplastic, and after the fluoroplastic powder is melted at a certain temperature, forming in a round table hole, a first threaded hole, a second threaded hole and a U-shaped ring of the valve clack, and solidifying and forming the fluoroplastic after cooling along with the heat treatment furnace;
the soft sealing structure comprises a valve clack, a sealing ring, a sleeve and a cover plate;
the valve clack comprises a first surface, a second surface and a third surface, a circular truncated cone hole is formed in the center of the first surface, the circular truncated cone hole comprises a first circle and a second circle, the diameter of the first circle is smaller than that of the second circle, a plurality of first threaded holes are uniformly distributed in the edge of the first surface along the circumference, a plurality of second threaded holes are uniformly distributed in the edge of the second surface along the circumference, and a U-shaped ring is formed between the second surface and the third surface;
the sleeve is sleeved on the outer side of the valve clack, one end of the valve clack is matched with the sealing ring, the sealing ring is matched with the round platform hole, the first threaded hole, the second threaded hole and the U-shaped ring, the outer side of the sealing ring is matched with the inner side of the sleeve, the cover plate is detachably connected with the sleeve, one end of the cover plate is matched with the other end of the valve clack, and the other end of the cover plate is matched with the end of the sleeve;
the number of the first threaded holes is equal to the number of the second threaded holes;
the first threaded holes and the second threaded holes are distributed in a staggered mode, and when the number of the first threaded holes or the second threaded holes is N, the angle between the first threaded holes and the second threaded holes is 180/N.
2. The method for forming a soft sealing structure according to claim 1, wherein one end of the inside of the sleeve is provided with an internal thread, one end of the cover plate is provided with an external thread, and the cover plate is in threaded connection with the sleeve.
3. The method of claim 1, wherein the valve flap, the sleeve and the cover are all made of metal.
4. The method of claim 1, wherein the sealing ring is made of fluoroplastic.
5. A method of forming a soft seal structure according to claim 1 wherein the fluoroplastic powder melts at a temperature of 360 ℃ to 390 ℃.
Priority Applications (1)
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CN202110187784.3A CN112984135B (en) | 2021-02-18 | 2021-02-18 | Soft sealing structure and forming method |
Applications Claiming Priority (1)
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CN202110187784.3A CN112984135B (en) | 2021-02-18 | 2021-02-18 | Soft sealing structure and forming method |
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CN112984135A CN112984135A (en) | 2021-06-18 |
CN112984135B true CN112984135B (en) | 2023-05-16 |
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CN115306910A (en) * | 2022-07-01 | 2022-11-08 | 福建省特种设备检验研究院 | Design and connection process of fluoroplastic soft sealing valve clack structure |
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CN101451615A (en) * | 2007-12-05 | 2009-06-10 | 北京纽希液压技术研究所 | N shaped composite sealing device |
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