CN109340373B - Flange metal gasket and production equipment and production process thereof - Google Patents
Flange metal gasket and production equipment and production process thereof Download PDFInfo
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- CN109340373B CN109340373B CN201811238195.8A CN201811238195A CN109340373B CN 109340373 B CN109340373 B CN 109340373B CN 201811238195 A CN201811238195 A CN 201811238195A CN 109340373 B CN109340373 B CN 109340373B
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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
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- 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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Abstract
The invention discloses a flange metal gasket, production equipment and a production process thereof. In the use flexible graphite can be embedded into the profile of tooth recess, and because the degree of depth of ripples tooth is different, the degree of compression of flexible graphite in different ripples teeth is different, and the deformation of flexible graphite in different ripples teeth is different promptly, and because in use flexible graphite keeps deformation state, the setting that the profile of tooth recess degree of depth is different can improve the creep resilience rate of graphite, and then improves the life of flexible graphite. Meanwhile, due to the fact that the tooth-shaped grooves are arranged in different depths, the sealing effect in the using process is correspondingly better, leakage in the using process is reduced, and the service life is prolonged.
Description
Technical Field
The invention relates to the field of flange sealing, in particular to a flange metal gasket, production equipment and a production process thereof.
Background
The Chinese patent with the publication number of CN 205877502U and the application date of 2016, 7, 19 discloses a novel flange gasket, which comprises a tooth-shaped metal framework and flexible graphite layers arranged on two sides of the tooth-shaped metal framework, wherein when the gasket is used, under certain pre-tightening stress, concentric circular groove structures of special shapes staggered with each other on the upper surface and the lower surface of the tooth-shaped metal framework can be tightly attached and compounded with the flexible graphite layers to realize primary sealing, and meanwhile, multiple sealing of the gasket can be realized by the staggered corrugated tooth structures of the tooth-shaped metal framework.
Although the flange gasket has a relatively good sealing effect, leakage inevitably occurs during long-term use and in special occasions such as high pressure. Especially under high pressure, if the sealing effect fails under high pressure environment, serious leakage and even serious consequences can be caused.
Disclosure of Invention
The invention aims to provide a metal gasket for a flange, which has better sealing and high-pressure leakage-proof effects.
The technical purpose of the invention is realized by the following technical scheme:
a flange metal gasket comprises a tooth-shaped metal framework, wherein the depth of tooth-shaped grooves formed in two sides of the tooth-shaped metal framework is arranged in a variable mode.
So set up, flexible graphite can be embedded into the profile of tooth recess in the use, and because the degree of depth of ripples tooth is different, the degree of compression of flexible graphite in different ripples teeth is different, and the deformation of flexible graphite in different ripples teeth is different promptly, and because in use flexible graphite keeps deformation state, the setting that the profile of tooth recess degree of depth is different can improve graphite's creep resilience rate, and then improves flexible graphite's life. Simultaneously, through the different settings of the degree of depth of profile of tooth recess, the sealed effect in the use also corresponding change more excellent, reduce the leakage rate when using, increase life.
More preferably: the depth of the tooth-shaped groove is gradually shallow from two sides to the middle.
So set up for flexible graphite's deformation is gradual change, can not appear sharp change and lead to flexible graphite to damage easily, also can not be because of the depth difference of profile of tooth recess is shallow and not obvious to creep rebound rate's promotion.
More preferably: the angles of the tooth-shaped grooves are the same, the intervals between the tooth peaks of the tooth-shaped grooves are the same, and the groove depth difference of any two adjacent tooth-shaped grooves is the same.
The groove depth difference values are set to be the same, so that the flexible graphite is more smoothly deformed to form regular deformation; and the creep rebound rate is improved more obviously by combining the arrangement with the same pitch of the tooth peaks.
More preferably: the flexible covering layers are arranged on two sides of the tooth-shaped metal framework, the compression rate of the flexible covering layers is 10% -50%, and the rebound rate is larger than or equal to 12%.
By the arrangement, the vacuum leakage rate of the metal gasket can reach less than or equal to 1.2 x 10 by combining the improvement of the above tooth-shaped metal framework structure-5And the sealing effect is greatly improved.
The invention also aims to provide production equipment for the metal gasket of the flange.
The second technical purpose of the invention is realized by the following technical scheme:
a production facility for flange metal gaskets, comprising:
an operation table;
the driving mechanism is arranged on the operating platform and used for driving the tooth-shaped metal framework to rotate around the axis;
and the cutting mechanism is arranged on the operating platform and comprises a cutter head for cutting the tooth-shaped groove.
The operating table is provided with a rolling supporting seat for placing the tooth-shaped metal framework, and the tooth-shaped metal framework is in rolling friction with the rolling supporting seat in the autorotation process.
According to the arrangement, the hoop driving mechanism drives the tooth-shaped metal framework to rotate, and in the process of rotation, the tooth-shaped groove is machined on the end face of the tooth-shaped metal framework through the cutter head.
More preferably: the rolling supporting seat comprises a supporting roller and at least one compression roller capable of lifting along the vertical direction, the compression roller is positioned right above the supporting roller and positioned on the same vertical surface, and the supporting roller and the compression roller form a compression and stabilization assembly.
Due to the arrangement, the toothed metal framework is subjected to the friction force of rolling wheels in the autorotation process through the arrangement of the rolling support seat, the resistance is small, the problems of scratching and the like on the surface of the toothed metal framework cannot be caused, and the machined toothed metal framework is higher in machining precision; and the arrangement of the compression roller can keep the tooth-shaped metal framework not to shake in the rotation process.
More preferably: the driving mechanism comprises a driving roller connected with the motor and a pressing roller capable of sliding in the horizontal direction, and the axial leads of the driving roller and the pressing roller are arranged in the vertical direction.
So set up, clip the profile of tooth metal framework through two gyro wheels, the rotation of rethread drive gyro wheel drives the rotation of profile of tooth metal framework, simple structure, and when the profile of tooth metal framework need be taken out, remove the pressure roller can, it is very convenient to use.
More preferably: the bracket of the pressure stabilizing assembly is provided with a mounting hole and an arc waist hole which are used for being connected with the operating platform; the independent supporting roller is arranged on a sliding rail through a fastening bolt; and the connecting seat of the driving mechanism is provided with two arc-shaped long waist holes for being connected with the operating platform.
So set up for the position of voltage steady subassembly, backing roll and actuating mechanism all is adjustable, makes and to process production to the profile of tooth metal framework of different diameters.
The third purpose of the invention is to provide a production process of a flange metal gasket.
The third technical purpose of the invention is realized by the following technical scheme:
the process for producing the metal gasket of the flange comprises the following steps:
s1, selecting materials, wherein the metal core plate is made of austenitic stainless steel with chemical components and mechanical properties meeting the requirements of GB/T32809 and GB/T4237; the flexible covering layer is a flexible graphite plate conforming to the QB/T3625 specification, an expanded polytetrafluoroethylene plate conforming to the JB/T10688 specification or a polytetrafluoroethylene plate conforming to the QB/T3625 specification;
s2, cutting, namely cutting the circular ring according to the parameters, or processing the circular ring in a sectional cutting and re-welding mode;
s3, deburring, namely hanging burrs left after cutting the circular ring;
s4, processing wave teeth, namely processing the wave teeth on the two side faces of the circular ring to form a tooth-shaped metal framework, wherein the cutter head is lifted up and falls down in a reciprocating manner in the same tooth-shaped groove processing process;
s5, checking, namely extracting 100 pieces of products in the same batch, dividing the products into 20 groups, and randomly extracting 1 group for testing, wherein the compression rate and the rebound rate of the tooth-shaped metal framework are tested according to a method B specified in GB/T12622-2008; the leakage rate of the tooth-shaped metal framework is tested according to a method A specified in GB/T12622-2008, when 1 does not meet the requirement, double quantity is extracted for detection, and if any does not meet the requirement, the whole batch is classified as unqualified product.
In conclusion, the invention has the following beneficial effects: through special profile of tooth groove structure setting, improved creep resilience rate and life to leakage rate under the vacuum environment has also obtained very big reduction, and holistic sealed effect is better good.
Drawings
FIG. 1 is a schematic structural diagram of the first embodiment;
FIG. 2 is a side sectional view of the first embodiment;
FIG. 3 is a side sectional view of the second embodiment;
FIG. 4 is a side sectional view of a third embodiment;
FIG. 5 is a schematic structural view of the fourth embodiment;
fig. 6 is an enlarged view of a portion a of fig. 5.
In the figure, 1, a tooth-shaped metal framework; 11. a tooth-shaped groove; 2. a flexible cover layer; 3. an operation table; 4. a drive mechanism; 41. a connecting seat; 411. an arc-shaped long waist hole; 42. driving the roller; 43. pressing the roller; 44. a horizontal cylinder; 5. a cutting mechanism; 6. a voltage stabilization component; 61. a support roller; 611. fastening a bolt; 62. a compression roller; 63. a slide rail; 64. a vertical cylinder; 65. a support; 651. an arc waist hole; 71. a horizontal tuyere; 72. and (4) a vertical air nozzle.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Example 1: a flange metal gasket is shown in figure 1 and comprises a circular toothed metal framework 1 and flexible covering layers 2 arranged on two sides of the toothed metal framework 1.
The tooth-shaped metal framework 1 is made of austenitic stainless steel with chemical components and mechanical properties meeting the requirements of GB/T32809 and GB/T4237, a plurality of tooth-shaped grooves 11 which are arranged in the same circle are arranged on two sides of the tooth-shaped metal framework 1, and the tooth-shaped grooves 11 form a wave-shaped structure on the end face of the tooth-shaped metal framework 1.
As shown in fig. 2, the depth of the tooth-shaped grooves 11 varies along the diameter direction of the tooth-shaped metal framework 1, and the tooth-shaped grooves are arbitrarily set, that is, the depth and the width of two adjacent tooth-shaped grooves 11 may be set to be the same or different, so that the tooth-shaped grooves are variously changed.
The compression rate of the flexible covering layer 2 is 10% -50%, the rebound rate is larger than or equal to 12%, and the flexible graphite plate according with QB/T3625 specification, the expanded polytetrafluoroethylene plate according with JB/T10688 specification or the polytetrafluoroethylene plate according with QB/T3625 specification can be selected as the material.
In the use in flexible graphite can imbed in profile of tooth recess 11, and because the degree of depth of ripples tooth is different, the degree of compression of flexible graphite in different ripples teeth is different, and the deformation of flexible graphite in different ripples teeth is different, and because in use flexible graphite keeps the deformation state, the setting that the profile of tooth recess 11 degree of depth is different can improve the creep resilience rate of graphite, and then improves the life of flexible graphite. Meanwhile, due to the fact that the depth of the tooth-shaped groove 11 is different, the sealing effect in the using process is correspondingly better, and the leakage rate in use is reduced.
Example 2: as shown in fig. 3, the difference from embodiment 1 is that the depth of the tooth-shaped groove 11 is regularly set, and the depth is gradually set from both sides to the middle.
Compared with the embodiment 1, the structure of the flexible graphite is gradually changed, so that the flexible graphite is not easily damaged due to abrupt change, and the creep resilience is not obviously improved due to shallow depth difference of the tooth-shaped groove 11.
Example 3: as shown in fig. 4, the difference from embodiment 2 is that the angles of the tooth-shaped grooves 11 are the same, the pitch between the peaks of the tooth-shaped grooves 11 is also the same, and the difference between the groove depths of any two adjacent tooth-shaped grooves 11 is the same.
Compared with the embodiment 2, the flexible graphite has smoother deformation due to the structural arrangement, and forms regular deformation as a whole; and the creep resilience rate is improved more obviously by combining the arrangement with the same pitch of the tooth peaks and the arrangement with the same angle of the tooth-shaped groove 11.
Example 4: a production device of a flange metal gasket is shown in figure 4 and comprises an operation table 3, and a driving mechanism 4, a cutting mechanism 5 and a rolling support seat which are arranged on the operation table 3.
The rolling support seat comprises a plurality of support rollers 61 and at least one compression roller 62 capable of lifting along the vertical direction, the embodiment comprises five support rollers 61 and two compression rollers 62, a slide rail 63 is arranged on the outer side of the operating platform 3, the slide rail 63 is fixedly installed on the side surface of the operating platform 3, wherein the two support rollers 61 are connected to the slide rail 63 through fastening bolts 611, two movable nuts capable of sliding on the slide rail 63 are arranged on the slide rail 63, the fastening bolts 611 are connected with the movable nuts, whether the support rollers 61 are fixed on the slide rail 63 or not can be realized through loosening the fastening bolts 611, and therefore, the support rollers 61 on the slide rail 63 can be adjusted through loosening the fastening bolts 611, so that the support rollers slide and rotate on the slide rail 63.
The remaining three support rollers 61 are located on the operation table 3, and two of them and two of the two press rollers 62 are combined in pairs to form two compression assemblies 6. The supporting roller 61 and the pressing roller 62 in the same group of the compression stabilizing assemblies 6 are arranged on a bracket 65, and the pressing roller 62 is positioned right above the supporting roller 61 and is installed on a piston rod of a vertical cylinder 64 and is controlled to move up and down through the vertical cylinder 64.
As shown in fig. 6, two driving mechanisms 4 are provided, each driving mechanism 4 includes a connecting seat 41, a driving roller 42 and a pressing roller 43, two arc-shaped long waist holes 411 are provided on the connecting seat 41, the two pressing assemblies 6 are fixedly mounted on the two connecting seats 41 respectively and pass through the arc-shaped long waist holes 411 to be fixedly connected to the operating platform 3 through bolts.
The driving roller 42 is installed on the connecting seat 41 and controlled by a motor to rotate (not shown in the figure), the pressing roller 43 is installed on a piston rod of a horizontal cylinder 44, and the movement of the piston rod is controlled by the horizontal cylinder 44, wherein the piston rod, the axis of the driving roller 42 and the axis of the pressing roller 43 are on the same straight line.
The driving roller 42 and the pressing roller 43 are horizontally arranged, and annular grooves are formed in the side walls of the driving roller and the pressing roller.
After the bolt is loosened, the connecting seat 41 can rotate around the axis of the driving roller 42 through the two arc-shaped long waist holes 411. A mounting hole and an arc-shaped waist hole 651 are provided on the bracket 65, and are mounted on the connection holder 41 through the mounting hole and the arc-shaped waist hole 651, and further adjustment can be performed through the arc-shaped waist hole 651.
As shown in fig. 5 and 6, the cutting mechanism 5 is located between the two driving mechanisms 4, and includes a driving cylinder and a cutter head, the cutter head is fixedly mounted on a piston rod of the driving cylinder, and the elevation of the cutter head is controlled by the driving cylinder. In addition, the rest of the support rollers 61 is positioned right below the cutter head for supporting.
A horizontal air nozzle 71 and a vertical air nozzle 72 are arranged on the cutting station, and the horizontal air nozzle 71 and the vertical air nozzle 72 are connected with an air pump to clean waste residues on the tooth-shaped metal framework 1.
When the support is used, the tooth-shaped metal framework 1 is placed on the rolling support seat and is supported through the five support rods. Then, the horizontal cylinder 44 is started to push the pressing roller 43 to move to clamp the tooth-shaped metal framework 1, the clamping bolts 611 and bolts on the support 65 are sent at the moment, all the supporting rollers 61 are adjusted, the axial lead of each supporting roller 61 is located on the same vertical surface with the center of the tooth-shaped metal framework 1, at the moment, the vertical cylinder 64 is started, the pressing roller 62 is pressed downwards to stabilize the tooth-shaped metal framework 1, and after the driving roller 42 is driven by the starting motor to rotate, the driving cylinder is started to descend the cutter head to process the tooth-shaped groove 11.
Example 5: a production process of a flange metal gasket comprises the following steps:
s1, selecting materials, wherein the metal core plate is made of austenitic stainless steel with chemical components and mechanical properties meeting the requirements of GB/T32809 and GB/T4237; the flexible covering layer 2 is a flexible graphite plate conforming to the QB/T3625 specification, an expanded polytetrafluoroethylene plate conforming to the JB/T10688 specification or a polytetrafluoroethylene plate conforming to the QB/T3625 specification;
s2, cutting, namely cutting the circular ring according to the parameters, or processing the circular ring in a sectional cutting and re-welding mode;
s3, deburring, namely hanging burrs left after cutting the circular ring;
s4, processing wave teeth, namely processing the wave teeth on the two side surfaces of the circular ring to form a tooth-shaped metal framework 1, wherein the cutter head is lifted and falls in a reciprocating manner in the processing process of the same tooth-shaped groove 11;
s5, checking, namely extracting 100 pieces of products in the same batch, dividing the products into 20 groups, and randomly extracting 1 group for testing, wherein the compression rate and the rebound rate of the tooth-shaped metal framework 1 are tested according to a method B specified in GB/T12622-2008; the leakage rate of the tooth-shaped metal framework 1 is tested according to a method A specified in GB/T12622-2008, when 1 does not meet the requirement, double quantity is extracted for detection, and if any does not meet the requirement, the whole batch is classified as unqualified products.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the present invention.
Claims (7)
1. The utility model provides a flange metal gasket, includes profile of tooth metal framework (1), characterized by: the depth of the tooth-shaped grooves (11) arranged on the two sides of the tooth-shaped metal framework (1) is changed;
the depth of the tooth-shaped groove (11) is gradually reduced from two sides to the middle;
the angles of the tooth-shaped grooves (11) are the same, the pitch between the peaks of the tooth-shaped grooves (11) is the same, and the difference value of the groove depth of any two adjacent tooth-shaped grooves (11) is the same;
the flexible covering layers (2) are arranged on two sides of the tooth-shaped metal framework (1), the compression rate of the flexible covering layers (2) is 10% -50%, and the rebound rate is larger than or equal to 12%.
2. A production facility for a flange metal gasket as set forth in claim 1, characterized by comprising:
an operation table (3);
the driving mechanism (4) is arranged on the operating platform (3) and is used for driving the tooth-shaped metal framework (1) to rotate around the axial line;
and the cutting mechanism (5) is arranged on the operating platform (3) and comprises a cutter head for cutting the tooth-shaped groove (11).
3. The apparatus for producing a flange metal gasket as set forth in claim 2, wherein: the operating table (3) is provided with a rolling supporting seat for placing the tooth-shaped metal framework (1), and the tooth-shaped metal framework (1) is in rolling friction with the rolling supporting seat in the autorotation process.
4. A production facility for a flange metal gasket according to claim 3, characterized in that: the rolling support seat comprises a support roller (61) and at least one compression roller (62) capable of lifting along the vertical direction, wherein the compression roller (62) is positioned right above the support roller (61) and positioned on the same vertical surface, and the support roller (61) and the compression roller (62) form a pressure stabilizing assembly (6).
5. The apparatus for producing a flange metal gasket as set forth in claim 2, wherein: the driving mechanism (4) comprises a driving roller (42) connected with the motor and a pressing roller (43) capable of sliding in the horizontal direction, and the axial leads of the driving roller (42) and the pressing roller (43) are arranged in the vertical direction.
6. The production facility of a flange metal gasket as set forth in claim 4, wherein: a mounting hole and an arc-shaped waist hole (651) which are used for being connected with the operating table (3) are formed in the support (65) of the pressure stabilizing assembly (6); the individual support rollers (61) are mounted on a slide rail (63) by fastening bolts (611); two arc-shaped long waist holes (411) used for being connected with the operating platform (3) are arranged on the connecting seat (41) of the driving mechanism (4).
7. A process for producing the flange metal gasket of claim 1, comprising the steps of:
s1, selecting materials, wherein the metal core plate is made of austenitic stainless steel with chemical components and mechanical properties meeting the requirements of GB/T32809 and GB/T4237; the flexible covering layer (2) is a flexible graphite plate conforming to the QB/T3625 specification, an expanded polytetrafluoroethylene plate conforming to the JB/T10688 specification or a polytetrafluoroethylene plate conforming to the QB/T3625 specification;
s2, cutting, namely cutting the circular ring according to the parameters, or processing the circular ring in a sectional cutting and re-welding mode;
s3, deburring, namely hanging burrs left after cutting the circular ring;
s4, processing wave teeth, namely processing the wave teeth on the two side surfaces of the circular ring to form a tooth-shaped metal framework (1), wherein the cutter head is lifted and falls in a reciprocating manner in the processing process of the same tooth-shaped groove (11);
s5, checking, namely extracting 100 pieces of products in the same batch, dividing the products into 20 groups, and randomly extracting 1 group for testing, wherein the compression rate and the rebound rate of the tooth-shaped metal framework (1) are tested according to a method B specified in GB/T12622-2008; the leakage rate of the tooth-shaped metal framework (1) is tested according to a method A specified in GB/T12622-2008, when 1 does not meet the requirement, double quantity is extracted for detection, and if any does not meet the requirement, the whole batch is classified as unqualified products.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811238195.8A CN109340373B (en) | 2018-10-23 | 2018-10-23 | Flange metal gasket and production equipment and production process thereof |
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| CN201811238195.8A CN109340373B (en) | 2018-10-23 | 2018-10-23 | Flange metal gasket and production equipment and production process thereof |
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| CN109340373A CN109340373A (en) | 2019-02-15 |
| CN109340373B true CN109340373B (en) | 2020-09-11 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113508253A (en) * | 2019-03-26 | 2021-10-15 | 株式会社华尔卡 | Sawtooth-shaped metal gasket |
| KR102163382B1 (en) * | 2019-10-18 | 2020-10-08 | 동의대학교 산학협력단 | Gasket processing equipment |
| CN115468051B (en) * | 2022-11-02 | 2023-03-24 | 江苏通工金属科技有限公司 | Be used for preventing high pressure inefficacy's flange metal gasket's apparatus for producing |
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| CN106704740A (en) * | 2017-03-03 | 2017-05-24 | 慈溪市高新密封材料有限公司 | Wave tooth composite gasket |
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| CN2886231Y (en) * | 2006-01-06 | 2007-04-04 | 铁岭铁光仪器仪表有限责任公司 | Seal gasket |
| CN103032569A (en) * | 2006-01-17 | 2013-04-10 | 阿尔弗雷德·荣格 | Sealing device |
| CN102159859A (en) * | 2008-07-16 | 2011-08-17 | 米科斯珀尔公司 | Comby two-sided overlain gasket for sealing of dismountable flanged joints |
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| CN109340373A (en) | 2019-02-15 |
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