CN115306910A - Design and connection process of fluoroplastic soft sealing valve clack structure - Google Patents
Design and connection process of fluoroplastic soft sealing valve clack structure Download PDFInfo
- Publication number
- CN115306910A CN115306910A CN202210773695.1A CN202210773695A CN115306910A CN 115306910 A CN115306910 A CN 115306910A CN 202210773695 A CN202210773695 A CN 202210773695A CN 115306910 A CN115306910 A CN 115306910A
- Authority
- CN
- China
- Prior art keywords
- fluoroplastic
- edge
- sealing material
- groove
- valve clack
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 229920002313 fluoropolymer Polymers 0.000 title claims abstract description 101
- 238000007789 sealing Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000003566 sealing material Substances 0.000 claims abstract description 64
- 238000005096 rolling process Methods 0.000 claims abstract description 28
- 239000011159 matrix material Substances 0.000 claims abstract description 11
- 238000005452 bending Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 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
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007514 turning Methods 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
- F16K1/36—Valve members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
- B29C65/64—Joining a non-plastics element to a plastics element, e.g. by force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/74—Joining plastics material to non-plastics material
- B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Valves (AREA)
Abstract
The invention relates to the technical field of sealing valves, in particular to a design of a fluoroplastic soft sealing valve clack structure and a connection process thereof, wherein the design comprises a matrix and a fluoroplastic sealing material; the bottom surface of the parent body is provided with a groove for accommodating the fluoroplastic sealing material; the bottom surface of the parent body is provided with a covered edge which can generate plastic deformation through rolling, and the covered edge is arranged close to the side part of the groove; and when the edge covers are bent towards the grooves, at least part of the inner surfaces of the edge covers are in close contact with the fluoroplastic sealing material. The design of the fluoroplastic soft sealing valve clack structure and the connection process thereof can effectively avoid the shedding of fluoroplastic sealing materials.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a design of a fluoroplastic soft sealing valve clack structure and a connection process thereof.
Background
On the chlorine pipeline, a stop valve with fluoroplastic soft seal is generally selected as an opening and closing valve, so that the valve is ensured not to leak in a closed state. However, during use, the fluoroplastic sealing material of the fluoroplastic sealing ring embedded on the valve flap often falls off, so that the sealing of the valve fails or the valve leaks after being used for a period of time.
The common soft sealing valve flap structure causes sealing failure and defects, and the specific reasons are analyzed as follows: 1. as shown in fig. 1, the rectangular groove is firstly processed on the valve flap, the fluoroplastic sealing material of the fluoroplastic sealing ring is pressed into the trapezoidal groove in an interference fit manner, but the fluoroplastic sealing material of the fluoroplastic sealing ring is easy to be loosened from the rectangular groove due to the cold flow property and the rebound resilience of fluoroplastic, when the stop valve is in an open operation state, the valve flap vibrates, and the fluoroplastic sealing ring is easy to loosen and fall off due to the cold flow property of fluoroplastic, so that the valve is seriously leaked when being closed. Meanwhile, the interference fit is adopted to press the rectangular groove, air in the groove can not be discharged after the air is pressed by the oil press, the sealing ring can not be in close contact with the bottom surface of the valve clack, the problem of uneven thickness can occur after the sealing ring is machined, and the air in the groove is discharged due to the cold flow property of the fluoroplastic in the use process, so that the leakage of the valve is caused when the valve is closed. 2. F46 is injected into the trapezoidal groove in an injection molding mode (as shown in figure 2), the sealing surface is always defective and high in cost, and sometimes the trapezoidal groove is not filled during injection molding, so that the sealing ring is loosened and falls off in use. 3. The large-caliber fluoroplastic sealing stop valve adopts a pressing plate mode, a groove is turned on the valve clack firstly, fluoroplastic sealing material is put in, the pressing plate is covered, the pressing plate is pressed by a bolt to fix the sealing ring, the machining and manufacturing process is troublesome, the required width of the fluoroplastic sealing material is wide, the cost is high, and the sealing ring is easy to damage.
Disclosure of Invention
In order to overcome the defects of the prior art, the technical problems to be solved by the invention are as follows: the design and the connection process of the fluoroplastic soft sealing valve clack structure can effectively prevent the fluoroplastic sealing material from loosening and falling off and have good sealing performance.
In order to solve the technical problems, the invention adopts the technical scheme that: a design of fluoroplastic soft sealing valve clack structure comprises a matrix and fluoroplastic sealing material;
the bottom surface of the parent body is provided with a groove for accommodating the fluoroplastic sealing material;
the bottom surface of the parent body is provided with a covered edge capable of generating plastic deformation, and the covered edge is arranged close to the side part of the groove; and when the edge covers are bent towards the grooves, at least part of the inner surfaces of the edge covers are in close contact with the fluoroplastic sealing material.
Further provides a connecting process of the fluoroplastic soft sealing valve clack structure, which comprises the following steps:
s1, constructing a parent body with a groove for containing fluoroplastic sealing materials on the bottom surface, wherein a covered edge capable of generating plastic deformation through rolling is processed on the parent body, and the covered edge is arranged close to the side part of the groove;
s2, placing a fluoroplastic sealing material in the groove, and rolling and bending the edge covering towards the groove to enable at least part of the inner surface of the edge covering to be in close contact with the fluoroplastic sealing material.
The invention has the beneficial effects that: and bending the covered edge towards the fluoroplastic sealing material in a rolling bending mode so as to enable at least part of the inner surface of the covered edge to be in close contact with the fluoroplastic sealing material, so that the fluoroplastic sealing material is fixed in the groove through the bent covered edge, and the fluoroplastic sealing material is prevented from falling off. Simultaneously, the connection technology that this application provided can be applicable to and inlay the manufacturing process to any disk seat of metal matrix material to all fluoroplastics type sealing materials, not only can make the fluoroplastics sealing material inlay firmly to do not produce the fluoroplastics sealing material phenomenon of droing, the leakproofness is good moreover.
Drawings
FIG. 1 is a schematic structural view of a prior art sealing structure in the background of the invention;
FIG. 2 is a schematic structural view of another prior art sealing structure of the present invention in the background art;
FIG. 3 is a schematic structural diagram of a mother body in an unfolded state of a wrapping edge according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of the mother body in a folded state of the edge covering according to the embodiment of the present invention;
fig. 5 is a schematic structural view of a rolling blade according to an embodiment of the present invention.
Description of the reference symbols: 1. a parent body; 2. a groove; 3. edge covering; 4. a fluoroplastic sealing material; 5. a cutter bar; 6. A bearing; 7. and (7) a pin shaft.
Detailed Description
In order to explain the technical contents, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
The design of a fluoroplastic soft sealing valve clack structure comprises a matrix and a fluoroplastic sealing material;
the bottom surface of the parent body is provided with a groove for accommodating the fluoroplastic sealing material;
the bottom surface of the parent body is provided with a covered edge capable of generating plastic deformation, and the covered edge is arranged close to the side part of the groove; and when the covered edge is bent towards the groove, at least part of the inner surface of the covered edge is tightly contacted with the fluoroplastic sealing material.
A connecting process of a fluoroplastic soft seal valve clack structure comprises the following steps:
s1, constructing a parent body with a groove for containing fluoroplastic sealing materials on the bottom surface, wherein a covered edge capable of generating plastic deformation through rolling is processed on the parent body, and the covered edge is arranged close to the side part of the groove;
s2, placing a fluoroplastic sealing material in the groove, and rolling and bending the edge covering towards the groove to enable at least part of the inner surface of the edge covering to be in close contact with the fluoroplastic sealing material.
The fluoroplastic sealing material is pressed into the groove in a small clearance fit mode, so that the surface of the fluoroplastic sealing material can be tightly attached to the side wall of the groove.
Preferably, the material of the edge cover is consistent with the parent body, the edge cover and the parent body are integrally formed, the thickness is preferably 2mm, the wall thickness is thin, and the edge cover is easy to roll to generate deformation. More preferably, the fluoroplastic sealing material has the characteristics of relatively high elongation (250-350%) and relatively low compressive strength (7 MPa), and is easy to generate plastic deformation, and the edge wrapping after rolling and bending is easy to generate certain deformation, so that the inner surface of the edge wrapping is in close contact with the surface of the fluoroplastic sealing material, the fluoroplastic sealing material is more tightly filled in the groove, and the fluoroplastic sealing material is in close contact with the bottom of the groove, and the fluoroplastic sealing material is fixed, and further the fluoroplastic sealing material is prevented from loosening in the long-time use process.
The inner surface of the edge covering is a side surface of the edge covering close to the groove.
The wrapping edge is arranged on the side part of the parent body groove, and the thickness of the wrapping edge is not too thick and is generally 2mm in order to facilitate bending of the wrapping edge.
Preferably, in S2, the bending direction of the wrapping edge is a direction having an angle of 45 ° with the axis of the parent body.
Preferably, the outer surface of the bent edge may be machined to be flush with the front surface of the fluoroplastic sealing material. Preferably, the machining is turning.
In one embodiment, the method further comprises the step of rolling the fluoroplastic sealing material with a rolling knife on the front surface before the edge rolling. And the front rolling is to roll the surfaces of the fluoroplastic sealing material exposed outside the grooves. The fluoroplastic sealing material is rolled by the rolling knife before the edge is folded, so that the fluoroplastic sealing material is deformed to a certain extent, and the fluoroplastic sealing material is promoted to be attached to the inner wall of the groove.
In one embodiment, the rolling cutter comprises a bearing, a cutter rod and a pin shaft; the bearing is connected with the cutter bar through the pin shaft. The cutter bar is fixed on the cutter holder, and the front surface of the bearing is contacted with the front surface of the fluoroplastic sealing material and rolls along the contour of the groove in the rotating process of the machine tool so as to roll the front surface of the fluoroplastic sealing material.
In one embodiment, after the front surface of the fluoroplastic sealing material is rolled, the rolling cutter makes the front surface of the bearing contact with a 45-degree inclined surface of the edge covering and roll along the circumference during the rotation of a machine tool, so that the edge covering is bent and deformed, and the inner surface of the edge covering is in close contact with the fluoroplastic sealing material.
In one embodiment, the fluoroplastic sealing material is a fluoroplastic sealing ring; the parent body comprises but is not limited to a sealing structure of a soft sealing stop valve clack body, a soft sealing ball valve seat, a soft sealing check valve clack or a soft sealing safety valve seat and the like by embedding fluoroplastic sealing materials into a metal parent body.
Example 1
S1, constructing a parent body 1 with a groove 2 for containing a fluoroplastic sealing material 4 on the bottom surface, wherein the parent body 1 is provided with at least one plastically-deformable edge 3, and the edge 3 is arranged close to the groove 2;
the matrix 1 is a stop valve clack body, the fluoroplastic sealing material 4 is a fluoroplastic sealing ring, the thickness of the edge 3 is 2mm, and the edge 3 and the matrix 1 are integrally formed;
s2, rolling the front surface of the fluoroplastic sealing material 4 by using a rolling cutter; the rolling cutter comprises a bearing 6, a cutter bar 5 and a pin shaft 7; the bearing 6 is connected with the cutter bar 5 through the pin shaft 7;
and S3, rolling and bending the covered edge 3 by using the rolling cutter in a direction with an included angle alpha of 45 degrees with the axis A of the matrix 1, effectively coating the bent covered edge 3 with a fluoroplastic sealing material 4, and then, performing machining to enable the outer surface of the covered edge to be flush with the front surface of the fluoroplastic sealing material.
In summary, the fluoroplastic sealing ring is wrapped in a rolling manner, and the wrapping edge with the thickness of 2mm on the parent body is bent and wrapped on the front surface of the fluoroplastic sealing ring, so that the fluoroplastic sealing ring is promoted to deform in the groove and tightly attached to the surface of the groove, and the fluoroplastic sealing ring is prevented from falling off in the using process; the front surface of the fluoroplastic sealing ring is pre-rolled in a rolling way, so that the contact tightness between the fluoroplastic sealing ring and the groove is improved; compared with the existing structure and process for injecting F46 into the trapezoidal groove in an injection molding mode, the connection process provided by the invention simplifies the process, saves a large amount of cost, and avoids the situation that the sealing ring is loosened due to insufficient filling which often occurs in the process; the connecting process provided by the invention can be suitable for valves with large calibers, so that the processing and the manufacturing are simpler and more reasonable, a pressing plate is not required to be manufactured, bolts are not required to be used for fixing, meanwhile, the sealing material is also saved, and the manufacturing cost of the valves is greatly reduced; the improved rolling process of soft sealing valve clack of stop valve is suitable for making fluoroplastic sealing material embedded into metal matrix material, such as valve seat of soft sealing ball valve, clack of soft sealing check valve and valve of soft sealing safety valve, and has firm embedding of sealing ring, no falling off of sealing ring and high sealing performance.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (9)
1. The design of a fluoroplastic soft sealing valve clack structure is characterized by comprising a matrix and a fluoroplastic sealing material;
the bottom surface of the parent body is provided with a groove for accommodating the fluoroplastic sealing material;
the bottom surface of the parent body is provided with a covered edge capable of generating plastic deformation, and the covered edge is arranged close to the side part of the groove; and when the edge covers are bent towards the grooves, at least part of the inner surfaces of the edge covers are in close contact with the fluoroplastic sealing material.
2. A connecting process of a fluoroplastic soft sealing valve clack structure is characterized by comprising the following steps:
s1, constructing a parent body with a groove for containing fluoroplastic sealing materials on the bottom surface, wherein a covered edge capable of generating plastic deformation through rolling is processed on the parent body, and the covered edge is arranged close to the side part of the groove;
s2, placing a fluoroplastic sealing material in the groove, and rolling and bending the edge covering towards the groove to enable at least part of the inner surface of the edge covering to be in close contact with the fluoroplastic sealing material.
3. The process for connecting a fluoroplastic soft seal valve flap structure according to claim 2, wherein in S2, the bending direction of the edge covering is a direction having an angle of 45 ° with the axis of the matrix.
4. The process for connecting the valve flap structure of fluoroplastic soft seal according to claim 2, wherein the outer surface of the bent edge is flush with the front surface of the fluoroplastic seal material.
5. A connection process of a fluoroplastic soft seal valve clack structure according to claim 2, wherein the thickness of the edge is 2mm.
6. The process for connecting a fluoroplastic soft seal flap structure according to claim 2, further comprising the step of rolling the fluoroplastic seal material with a rolling blade in front face before bending the edge covering.
7. A connection process of a fluoroplastic soft seal valve clack structure according to claim 5, wherein the rolling cutter comprises a bearing, a cutter rod and a pin shaft;
the bearing is connected with the cutter bar through the pin shaft.
8. A process according to any one of claims 2 to 7 wherein said fluoroplastic sealing material is a fluoroplastic sealing ring.
9. A connection process of a fluoroplastic soft seal valve clack structure as claimed in claim 8, wherein the matrix is a soft seal stop valve clack body, a soft seal ball valve seat, a soft seal check valve clack or a soft seal safety valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210773695.1A CN115306910A (en) | 2022-07-01 | 2022-07-01 | Design and connection process of fluoroplastic soft sealing valve clack structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210773695.1A CN115306910A (en) | 2022-07-01 | 2022-07-01 | Design and connection process of fluoroplastic soft sealing valve clack structure |
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| Publication Number | Publication Date |
|---|---|
| CN115306910A true CN115306910A (en) | 2022-11-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210773695.1A Pending CN115306910A (en) | 2022-07-01 | 2022-07-01 | Design and connection process of fluoroplastic soft sealing valve clack structure |
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| CN (1) | CN115306910A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0206767D0 (en) * | 2002-03-22 | 2002-05-01 | Seetru Ltd | Improved sealing arrangement for safety valves for use especially with refrigeration media |
| CN203857121U (en) * | 2013-12-26 | 2014-10-01 | 重庆海王仪器仪表有限公司 | Cam deflection valve |
| CN104712786A (en) * | 2015-03-20 | 2015-06-17 | 海安阀门厂有限公司 | Soft sealing structure for valve seat |
| CN112984135A (en) * | 2021-02-18 | 2021-06-18 | 浙江万龙机械有限公司 | Soft sealing structure and forming method |
| CN214466354U (en) * | 2021-02-19 | 2021-10-22 | 浙江吉达特种阀门有限公司 | Special check valve for oxygen |
-
2022
- 2022-07-01 CN CN202210773695.1A patent/CN115306910A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0206767D0 (en) * | 2002-03-22 | 2002-05-01 | Seetru Ltd | Improved sealing arrangement for safety valves for use especially with refrigeration media |
| CN203857121U (en) * | 2013-12-26 | 2014-10-01 | 重庆海王仪器仪表有限公司 | Cam deflection valve |
| CN104712786A (en) * | 2015-03-20 | 2015-06-17 | 海安阀门厂有限公司 | Soft sealing structure for valve seat |
| CN112984135A (en) * | 2021-02-18 | 2021-06-18 | 浙江万龙机械有限公司 | Soft sealing structure and forming method |
| CN214466354U (en) * | 2021-02-19 | 2021-10-22 | 浙江吉达特种阀门有限公司 | Special check valve for oxygen |
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