CN114623246A - Sealing gasket special for triple eccentric butterfly valve and manufacturing method thereof - Google Patents
Sealing gasket special for triple eccentric butterfly valve and manufacturing method thereof Download PDFInfo
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- CN114623246A CN114623246A CN202111602038.2A CN202111602038A CN114623246A CN 114623246 A CN114623246 A CN 114623246A CN 202111602038 A CN202111602038 A CN 202111602038A CN 114623246 A CN114623246 A CN 114623246A
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- 238000007789 sealing Methods 0.000 title claims abstract description 58
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 79
- 239000010439 graphite Substances 0.000 claims abstract description 79
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 79
- 239000003292 glue Substances 0.000 claims abstract description 49
- 239000010410 layer Substances 0.000 claims abstract description 44
- 239000010935 stainless steel Substances 0.000 claims abstract description 30
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 30
- 239000011229 interlayer Substances 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 238000004132 cross linking Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000007598 dipping method Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 230000001680 brushing effect Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000007514 turning Methods 0.000 claims description 3
- 230000004584 weight gain Effects 0.000 claims description 3
- 235000019786 weight gain Nutrition 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 13
- 238000004073 vulcanization Methods 0.000 abstract description 11
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 238000005470 impregnation Methods 0.000 description 7
- 238000003754 machining Methods 0.000 description 7
- 210000004907 gland Anatomy 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000004944 Liquid Silicone Rubber Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001039 duplex stainless steel Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- 239000007788 liquid Substances 0.000 description 1
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- 239000003921 oil Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Images
Classifications
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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
- F16K1/16—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 with pivoted closure-members
- F16K1/18—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 with pivoted closure-members with pivoted discs or flaps
- F16K1/22—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 with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/102—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by material
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/108—Special methods for making a non-metallic packing
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
- F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
- F16J15/122—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement generally parallel to the surfaces
-
- 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
- F16K1/16—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 with pivoted closure-members
- F16K1/18—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 with pivoted closure-members with pivoted discs or flaps
- F16K1/22—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 with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/2261—Shaping or arrangements of the sealing the sealing being arranged on the valve member
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a special sealing gasket for a triple eccentric butterfly valve and a manufacturing method thereof. The graphite layer is formed by low-density graphite impregnating glue. The bonded interlayer glue and the impregnated glue can be crosslinked under the vulcanization effect, and the special sealing gasket for the triple eccentric butterfly valve disclosed by the invention has the advantages of corrosion resistance, high temperature and high pressure resistance, has self-lubricating property, and greatly improves the sealing property of the triple eccentric butterfly valve, thereby prolonging the service life of the butterfly valve; the multilayer stainless steel graphite mat is formed by stacking a plurality of layers of stainless steel and graphite mats impregnated with specific glue, and the interlayer glue and the impregnated glue generate a cross-linking reaction after vulcanization, so that a guarantee is provided for the precision processing of subsequent products and the realization of zero leakage.
Description
Technical Field
The application relates to the technical field of sealing gaskets, in particular to a sealing gasket special for a three-eccentric butterfly valve and a manufacturing method thereof.
Background
Since the advent of the triple offset butterfly valve, in order to meet increasingly severe operating condition requirements, the triple offset butterfly valve itself has undergone a self-perfecting and continuous development process, and even though the most basic zero leakage can be achieved theoretically, the triple offset butterfly valve is actually dependent on intensive design and precise manufacturing. The main key points are the design and the precision machining of the sealing butterfly plate, and along with the improvement of precision manufacturing, the precision machining is basically solved, but the design and the related technology of the sealing butterfly plate need to be overcome.
For example, in chinese patent literature, a utility model of a triple offset butterfly valve, which is issued under the publication number CN205937883U in 2017, 2.8.8.s, includes a lower gland, a bearing, a shaft retainer, a gasket, a valve body, a pin, a butterfly plate, a valve stem, a packing, a bolt, a nut, a gland, a bracket, a speed reducer, and a seal ring; the lower pressing cover is arranged at the lower end of the valve body, and a gasket is arranged between the lower pressing cover and the valve body; the number of the bearings is two, a shaft check ring is arranged between the two bearings, and the bearings and the shaft check ring are arranged in the lower gland and are in contact with the valve body; the pin fixes the butterfly plate on the valve rod; the packing is positioned between the gland and the valve body, and the gland is positioned at the upper end part of the valve body; the bracket is connected with the valve body through a bolt and a nut; the speed reducer is positioned at the upper part of the bracket and connected with the valve rod; the valve rod penetrates through the gland and the packing, and the tail end of the valve rod is positioned in the bearing; the sealing ring is arranged on the butterfly plate and is positioned between the contact surfaces of the butterfly plate and the valve body.
The gasket of the three-eccentric butterfly valve in the prior art has the problems of short service life, poor sealing performance and poor corrosion resistance, and the reliability of the three-eccentric butterfly valve is greatly influenced.
Disclosure of Invention
Based on the defects of the prior art, the application provides the rotating sealing gasket of the triple eccentric butterfly valve formed by combining the multilayer duplex stainless steel and the graphite and the manufacturing method thereof, and the rotating sealing gasket has the advantages of corrosion resistance, high temperature and high pressure resistance, has self-lubricating performance, and greatly improves the sealing performance of the triple eccentric butterfly valve, thereby prolonging the service life of the butterfly valve.
The invention also aims to stack a plurality of layers of stainless steel and graphite pads impregnated with specific glue, and the interlayer glue and the impregnated glue generate a cross-linking reaction after vulcanization, thereby providing guarantee for the precision processing of subsequent products and the realization of zero leakage.
In order to achieve the above object, the present invention adopts the following technical solutions.
The utility model provides a special seal gasket of three eccentric butterfly valves, is equipped with two-layerly including stainless steel layer and the graphite layer that sets up in turn, graphite layer, and stainless steel layer is equipped with the three-layer, and graphite layer and stainless steel layer bonding connection. Compared with the traditional butterfly valve product, the triple eccentric butterfly valve is more resistant to high-temperature and high-pressure environments and more corrosion-resistant; meanwhile, due to the unique design of the triple eccentric center and the self-lubricating property of the graphite, the opening torque of the valve is greatly reduced, and the actuator matched with the valve is driven to be more energy-saving and economical; when the valve is closed, the torque of the transmission mechanism is increased, so that the graphite layer can provide a compensation seal, the sealing performance of the three-eccentric center butterfly valve is greatly improved, and the service life of the butterfly valve is prolonged.
Preferably, the graphite layer is formed by using low-density graphite impregnating glue. The bonded interlayer glue and the impregnated glue can be crosslinked under the vulcanization effect, so that the sealing property is further improved, the product structure is more stable, and the problem that the stainless steel and the graphite pad or the graphite pad body are layered under the processing stress during subsequent finish machining is solved; meanwhile, the defect that the graphite layer on the outer diameter of the product is easy to crack during machining is overcome.
Preferably, the outer contour of the special sealing gasket is oval, and the inner contour of the special sealing gasket is round. The outer contour of the product is designed to be special elliptic, so that the subsequent processing is facilitated, the stress is more uniform, and a more effective sealing effect is obtained.
Preferably, the outer and inner profiles of the dedicated sealing gasket are arranged concentrically. The processing centering is convenient, and the molding and the precision detection are convenient.
A manufacturing method based on the special sealing gasket for the three-eccentric center butterfly valve is characterized by comprising the following steps:
a1, manufacturing a low-density graphite pad, dipping the low-density graphite pad with glue, and fully filling graphite pores with the glue;
a2, manufacturing a stainless steel pad, and cleaning and deoiling the surface of the stainless steel pad after the stainless steel pad is deburred;
B. brushing interlayer glue, wherein the stainless steel pad with the surface coated with the interlayer glue and the low-density graphite pad with the surface coated with the interlayer glue are sequentially laminated;
C. vulcanizing and shaping, namely performing cross-linking reaction on interlayer glue adhered between the layers and impregnating glue in the low-density graphite pad under the action of a vulcanizing press;
D. finely turning the inner diameter and the outer diameter of the sealing gasket, and polishing the surface of the sealing gasket;
E. inspecting, namely packaging the qualified sealing gasket for delivery;
wherein, the step A1 and the step A2 are not in sequence.
The bonded interlayer glue and the impregnated glue are crosslinked under the vulcanization effect, so that the sealing performance is further improved, the product structure is more stable, and the problem that the stainless steel and the graphite pad or the graphite pad body are layered under the processing stress during subsequent fine processing is solved; meanwhile, the defect that the graphite layer on the outer diameter of the product is easy to crack during machining is overcome. The product can completely replace an inlet, so that the performance of approximate zero friction and zero leakage of the three-eccentric butterfly valve is realized.
Preferably, in step A1, the low density graphite pad has a density of 0.5 to 1.0 g/cc. Graphite paper with oxidation resistance and high tensile strength can be selected, materials are convenient to obtain and manufacture, and the graphite pad within the density range is more convenient for finishing gum dipping.
Preferably, in step a1, the low density graphite mat impregnation process controls the low density graphite mat weight gain to be between 5% and 15%. And the filling degree of the impregnating glue in the graphite pad is ensured to be reliable.
Preferably, in step a1, the low density graphite mat is impregnated by vacuum and pressure impregnation. The graphite pad chooses low density for use, and the impregnation mode adopts vacuum and pressurized mode, all is for the ease of realizing abundant dipping treatment, fills the graphite pore space, prevents that the loss between the product layer from revealing.
The invention has the following beneficial effects: the butterfly valve has the advantages of corrosion resistance, high temperature and high pressure resistance, has self-lubricating property, and greatly improves the sealing property of the triple eccentric butterfly valve, thereby prolonging the service life of the butterfly valve; the multilayer stainless steel and the graphite pad impregnated with the specific glue are stacked, and the interlayer glue and the impregnated glue generate a cross-linking reaction after vulcanization, so that the guarantee is provided for the precision processing of subsequent products and the realization of zero leakage.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an enlarged sectional view taken along a-a in fig. 1.
Fig. 3 is a process flow diagram during the fabrication of the present invention.
In the figure: and (3) interlayer glue 4 for the graphite layer 2, the stainless steel layer 3 and the special sealing gasket 1.
Detailed Description
The invention is further illustrated with reference to the figures and the specific embodiments.
In the case of the example 1, the following examples are given,
fig. 1 and 2 show a special sealing gasket for a triple offset butterfly valve, wherein the outer contour of the special sealing gasket 1 is oval, and the inner contour of the special sealing gasket 1 is round. The product outline is designed to be special elliptic, so that the subsequent processing stress is more uniform, and a more effective sealing effect is obtained. The special sealing gasket 1 comprises stainless steel layers 3 and graphite layers 2 which are alternately arranged, the graphite layers 2 are two layers, the stainless steel layers 3 are three layers, and the graphite layers 2 and the stainless steel layers 3 are connected in a bonding mode. The graphite layer 2 is formed by low-density graphite impregnating glue. The graphite with oxidation resistance and high tensile strength is selected as the low-density graphite, the glue filling degree in the graphite layer 2 is ensured in a vacuum pressurization impregnation mode, the sufficient amount of impregnating glue in the graphite layer 2 is ensured, the bonded interlayer glue 4 and the impregnating glue can be crosslinked under the vulcanization effect, the product structure is more stable while the sealing performance is further improved, and the problem that the stainless steel and the graphite pad or the graphite pad body are layered under the processing stress in the subsequent fine processing is solved; meanwhile, the defect that the graphite layer 2 on the outer diameter of the product is easy to crack during machining is overcome; the special sealing gasket 1 enables the three-eccentric center butterfly valve to be more resistant to high-temperature and high-pressure environments and more corrosion-resistant than a traditional butterfly valve product; meanwhile, due to the unique design of three eccentricities and the self-lubricating property of graphite, the opening torque of the valve is greatly reduced, and the actuator matched with the valve driving can be selected to be more energy-saving and economical; when the valve is closed, the moment of the transmission mechanism is increased, so that the graphite layer 2 can provide a compensation seal, the sealing performance of the triple eccentric butterfly valve is greatly improved, and the service life of the butterfly valve is prolonged.
In the case of the example 2, the following examples are given,
a manufacturing method based on the special sealing gasket 1 for the triple offset butterfly valve is shown in figure 3 and comprises the following steps:
a1, low-density graphite pad, the density of the low-density graphite pad is 0.5 to 1.0 g/cc. Specifically, the low-density graphite pad is made of graphite paper with oxidation resistance and high tensile strength, the technical indexes of the graphite paper are shown in the following table 2, the low-density graphite pad is impregnated in a vacuum and pressure impregnation mode, and the weight gain rate of the low-density graphite pad is controlled to be between 5% and 15% in the impregnation process of the low-density graphite pad. The glue is fully filled in the graphite pores;
a2, manufacturing a stainless steel pad, and cleaning and deoiling the surface of the stainless steel pad after the stainless steel pad is deburred;
B. brushing interlayer glue 4, and sequentially laminating the stainless steel pad with the surface coated with the interlayer glue 4 and the low-density graphite pad with the surface coated with the interlayer glue 4;
C. vulcanization shaping, namely performing cross-linking reaction on interlayer glue 4 bonded between the layers and impregnating glue in the low-density graphite pad under the action of a vulcanization press; the interlayer glue 4 and the impregnating glue can adopt a two-component polyurethane adhesive and a two-component addition type room temperature vulcanized liquid silicone rubber, so that a reliable vulcanization crosslinking reaction is realized, and the bonding reliability is ensured;
D. finely turning the inner diameter and the outer diameter of the sealing gasket, and polishing the surface of the sealing gasket;
E. inspecting, namely packaging the qualified sealing gasket for delivery;
wherein, the step A1 and the step A2 are not separated in sequence.
The graphite pad chooses low density for use, and the impregnation mode adopts vacuum and pressor mode, all is for the ease of realizing abundant dipping treatment, fills the graphite hole, prevents that the loss between the product layer from revealing. The bonded interlayer glue 4 and the impregnating glue are crosslinked under the action of vulcanization, so that the sealing performance is further improved, the product structure is more stable, and the problem that the stainless steel and the graphite pad or the graphite pad body are layered under the processing stress in the subsequent fine processing is solved; meanwhile, the defect that the graphite layer 2 on the outer diameter of the product is easy to crack during machining is overcome. The technical indexes of the special sealing gasket 1 are shown in table 1, the special sealing gasket can completely replace an inlet, so that the performance of approximate zero friction and zero leakage of a three-eccentric butterfly valve can be realized, the special sealing gasket can be widely applied to high-temperature water and steam systems in industries such as petroleum, chemical engineering, electric power, metallurgy and the like, a heating vacuum system in areas with frequent change of working temperature is used for shipbuilding and heavy industry at high temperature, the special sealing gasket is frequently opened and closed under high pressure, the opening and closing time is short, the working condition with large opening and closing pressure difference is adopted, and gas and liquid media (such as water, water vapor, oil, air, smoke, coal gas and the like) are effectively cut off and controlled.
Claims (8)
1. The sealing gasket special for the triple eccentric butterfly valve is characterized by comprising stainless steel layers and graphite layers which are alternately arranged, wherein the graphite layers are two layers, the stainless steel layers are three layers, and the graphite layers are connected with the stainless steel layers in a bonding mode.
2. The special sealing gasket for the triple offset butterfly valve according to claim 1, wherein the graphite layer is formed by low-density graphite impregnating glue.
3. The special sealing gasket for the triple offset butterfly valve according to claim 1, wherein the outer contour of the special sealing gasket is elliptical, and the inner contour of the special sealing gasket is circular.
4. The special sealing gasket for the triple offset butterfly valve according to claim 3, wherein the outer contour and the inner contour of the special sealing gasket are concentrically arranged.
5. A manufacturing method of the special sealing gasket for the triple offset butterfly valve based on any one of the requirements 1 to 4 is characterized by comprising the following steps:
a1, manufacturing a low-density graphite pad, dipping the low-density graphite pad with glue, and fully filling graphite pores with the glue;
a2, manufacturing a stainless steel pad, and cleaning and deoiling the surface of the stainless steel pad after the stainless steel pad is deburred;
B. brushing interlayer glue, and sequentially laminating a stainless steel pad coated with the interlayer glue on the surface and a low-density graphite pad coated with the interlayer glue on the surface;
C. vulcanizing and shaping, namely performing cross-linking reaction on interlayer glue adhered between the layers and impregnating glue in the low-density graphite pad under the action of a vulcanizing press;
D. finely turning the inner diameter and the outer diameter of the sealing gasket, and polishing the surface of the sealing gasket;
E. inspecting, namely packaging the qualified sealing gasket for delivery;
wherein, the step A1 and the step A2 are not in sequence.
6. The method for manufacturing the sealing gasket for the triple offset butterfly valve according to claim 5, wherein in the step A1, the density of the low-density graphite pad is 0.5 to 1.0 g/cc.
7. The method for manufacturing the sealing gasket special for the triple offset butterfly valve according to claim 5, wherein in the step A1, the gum dipping process of the low-density graphite pad controls the weight gain rate of the low-density graphite pad to be between 5% and 15%.
8. The method for manufacturing the sealing gasket special for the triple offset butterfly valve according to claim 5, wherein in the step A1, the low-density graphite pad is dipped in the solution by vacuum and pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111602038.2A CN114623246A (en) | 2021-12-24 | 2021-12-24 | Sealing gasket special for triple eccentric butterfly valve and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111602038.2A CN114623246A (en) | 2021-12-24 | 2021-12-24 | Sealing gasket special for triple eccentric butterfly valve and manufacturing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN114623246A true CN114623246A (en) | 2022-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111602038.2A Pending CN114623246A (en) | 2021-12-24 | 2021-12-24 | Sealing gasket special for triple eccentric butterfly valve and manufacturing method thereof |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6376963A (en) * | 1986-09-18 | 1988-04-07 | Kitazawa Valve:Kk | Valve seat structure |
| JPH0517737A (en) * | 1991-07-10 | 1993-01-26 | Hitachi Chem Co Ltd | Metal substrate graphite gasket |
| JPH08245947A (en) * | 1995-03-10 | 1996-09-24 | Hitachi Chem Co Ltd | Metallic gasket material, its production and metallic gasket |
| JP2005127412A (en) * | 2003-10-23 | 2005-05-19 | Tomoe Tech Res Co | Fire-resisting eccentric butterfly valve and seat ring for use in it |
| KR20110098129A (en) * | 2010-02-26 | 2011-09-01 | 한국유니콤밸브주식회사 | Multiple eccentric butterfly valve |
| CN202327142U (en) * | 2011-11-23 | 2012-07-11 | 温州纳川阀门有限公司 | Bidirectional hard-sealing tri-eccentric butterfly valve |
| EP2505882A1 (en) * | 2011-03-29 | 2012-10-03 | Tyco Valves & Controls Italia S.r.L. | Sealing insert for a ball valve, seat for ball valve and ball valve |
| CN205118277U (en) * | 2015-10-19 | 2016-03-30 | 温州凯冠阀门有限公司 | Stainless steel is very stiff and demanding butterfly valve at many levels |
| CN215172324U (en) * | 2021-06-29 | 2021-12-14 | 江苏高华流体控制有限公司 | Wear-resistant hard-sealing three-eccentric butterfly valve |
-
2021
- 2021-12-24 CN CN202111602038.2A patent/CN114623246A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6376963A (en) * | 1986-09-18 | 1988-04-07 | Kitazawa Valve:Kk | Valve seat structure |
| JPH0517737A (en) * | 1991-07-10 | 1993-01-26 | Hitachi Chem Co Ltd | Metal substrate graphite gasket |
| JPH08245947A (en) * | 1995-03-10 | 1996-09-24 | Hitachi Chem Co Ltd | Metallic gasket material, its production and metallic gasket |
| JP2005127412A (en) * | 2003-10-23 | 2005-05-19 | Tomoe Tech Res Co | Fire-resisting eccentric butterfly valve and seat ring for use in it |
| KR20110098129A (en) * | 2010-02-26 | 2011-09-01 | 한국유니콤밸브주식회사 | Multiple eccentric butterfly valve |
| EP2505882A1 (en) * | 2011-03-29 | 2012-10-03 | Tyco Valves & Controls Italia S.r.L. | Sealing insert for a ball valve, seat for ball valve and ball valve |
| CN202327142U (en) * | 2011-11-23 | 2012-07-11 | 温州纳川阀门有限公司 | Bidirectional hard-sealing tri-eccentric butterfly valve |
| CN205118277U (en) * | 2015-10-19 | 2016-03-30 | 温州凯冠阀门有限公司 | Stainless steel is very stiff and demanding butterfly valve at many levels |
| CN215172324U (en) * | 2021-06-29 | 2021-12-14 | 江苏高华流体控制有限公司 | Wear-resistant hard-sealing three-eccentric butterfly valve |
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