Ultrahigh-pressure sealing gasket and preparation process

Abstract

The invention discloses an ultrahigh-pressure sealing gasket and a preparation process, and relates to the technical field of ultrahigh-pressure sealing gaskets, and the ultrahigh-pressure sealing gasket comprises a corrosion-resistant layer used for providing corrosion resistance and reducing chemical medium erosion; the tear-resistant enhancement layer is used for enhancing the overall strength and improving the tear resistance; the core sealing layer is used for providing a sealing effect; the heat insulation layer is used for providing an excellent heat insulation effect; the substrate layer is used for increasing the supporting force and the overall high temperature resistance and pressure resistance; wherein the corrosion-resistant layer, the tear-resistant reinforcing layer, the core sealing layer, the heat insulation layer and the base layer are arranged in sequence, and the corrosion-resistant layer, the tear-resistant reinforcing layer, the core sealing layer, the heat insulation layer and the base layer form a whole through a lamination forming process. The corrosion resistance, the sealing performance and the tensile strength are insufficient.

Description

Technical Field

[0001] The invention relates to the technical field of ultra-high pressure sealing gaskets, and in particular to an ultra-high pressure sealing gasket and a preparation process thereof. Background Art

[0002] Ultra-high pressure gaskets are mainly used to provide sealing in high pressure environments and are widely used in equipment and pipeline systems in industries such as petroleum, chemical, metallurgy, and nuclear energy. Their main function is to prevent medium leakage and ensure the safe and stable operation of equipment. The design and material selection of ultra-high pressure gaskets are very critical.

[0003] Existing ultra-high pressure sealing gaskets mainly include metal sealing gaskets, asbestos sealing gaskets and rubber sealing gaskets. Although metal sealing gaskets can withstand a relatively large pressure range, their compression rebound performance is limited and their application range is narrow. Although asbestos sealing gaskets have excellent sealing performance and corrosion resistance and are low in price, asbestos is a carcinogen. Rubber sealing gaskets have loose structure and low density, and have problems with insufficient tensile strength, creep relaxation resistance and aging resistance. Therefore, we urgently need an ultra-high pressure sealing gasket with relatively excellent corrosion resistance, sealing, tensile strength and certain heat resistance, so as to solve the sealing problem of equipment under ultra-high pressure working environment.

[0004] In the invention with application number: CN201710668556.1 and publication number: CN107501784B, a high-strength composite sealing gasket for high-pressure oil pipes is disclosed. It is a multi-layer composite structure, which includes a first surface coating, a first transition layer, a core layer, a second transition layer, and a second surface coating from top to bottom. The first surface coating and the second surface coating have good corrosion resistance and high temperature resistance. The first transition layer and the second transition layer have two functions. One is to help the first surface coating and the second surface coating to bond well. The second is that the first transition layer and the second transition layer have pores inside and have a certain elasticity. It still has the problem of insufficient tensile strength. Summary of the invention

[0005] Based on this, in order to address the above problems, the present invention proposes an ultra-high pressure sealing gasket and a preparation process, which solves the problems of insufficient corrosion resistance, sealing performance and tensile strength of the current ultra-high pressure sealing gaskets when in use.

[0006] The technical solution of the present invention is:

[0007] An ultra-high pressure sealing gasket, comprising:

[0008] Corrosion-resistant layer: the corrosion-resistant layer is used to provide corrosion resistance and reduce erosion by chemical media;

[0009] The tear-resistant reinforcement layer is used to enhance the overall strength and improve the tear-resistant ability;

[0010] A core sealing layer, which is used to provide a sealing effect;

[0011] Insulation layer: The insulation layer is used to provide excellent thermal insulation effect;

[0012] Base layer: the base layer is used to increase the support force and the overall high temperature and pressure resistance;

[0013] Among them, the corrosion-resistant layer, the tear-resistant reinforcement layer, the core sealing layer, the thermal insulation layer and the base layer are arranged in sequence, and the corrosion-resistant layer, the tear-resistant reinforcement layer, the core sealing layer, the thermal insulation layer and the base layer are formed as a whole through a lamination molding process.

[0014] Preferably, the corrosion-resistant layer is made of polytetrafluoroethylene film with a thickness of 0.5 mm.

[0015] Preferably, the tear-resistant reinforcement layer is made of aramid fiber and has a thickness of 1.0 mm.

[0016] Preferably, the core sealing layer is made of high-purity graphite with a thickness of 2.0 mm.

[0017] Preferably, the heat insulation layer is made of nano silicon and has a thickness of 1.5 mm.

[0018] Preferably, the base layer is made of fluororubber and has a thickness of 1.0 mm.

[0019] A process for preparing an ultra-high pressure sealing gasket, used for preparing an ultra-high pressure sealing gasket as described in any one of the above, comprises the following steps:

[0020] Step S1: material preparation;

[0021] Step S11: preparing polytetrafluoroethylene film;

[0022] Cut the polytetrafluoroethylene film into sheets with a length of Xmm, a width of Ymm, and a thickness of 0.5mm, and then set aside for later use;

[0023] Step S12: preparing aramid fiber;

[0024] Cut the aramid fiber into sheets with a length of Xmm, a width of Ymm and a thickness of 1.0mm, and then set aside for later use;

[0025] Step S13: preparing high-purity graphite;

[0026] High-purity graphite is pressed into shape by pressure, and cut into thin sheets with a length of Xmm, a width of Ymm, and a thickness of 2.0mm, and then placed for standby;

[0027] Step S14: nano-silicon preparation;

[0028] The nano-silicon is made into a thin sheet with a length of Xmm, a width of Ymm, and a thickness of 1.5mm, and then placed aside for later use.

[0029] Step S15: preparing fluororubber;

[0030] The fluororubber is pressed and formed by pressure, and cut into thin sheets with a length of Xmm, a width of Ymm, and a thickness of 1.0mm, and then placed for use;

[0031] Step S2: placing the polytetrafluoroethylene film sheet, aramid fiber sheet, high-purity graphite sheet, nano-silicon sheet and fluororubber sheet obtained in step S1 into a mold in sequence, and hot-pressing them into a finished primary sealing gasket by a hot press;

[0032] Step S3: placing the finished first-level sealing gasket into an oven for curing, and after cooling, obtaining a finished second-level sealing gasket;

[0033] Step S4: cutting the finished secondary sealing gasket into a shape with a length of X1mm and a width of Y1mm, and performing edge processing on the finished secondary sealing gasket to obtain a primary sealing gasket;

[0034] Step S5: sending the primary sealing gasket into an electric furnace for annealing, and obtaining a secondary sealing gasket after natural cooling;

[0035] Step S6: Performing quality inspection on the secondary sealing gaskets, sending the qualified secondary sealing gaskets into a surface coating machine for surface coating treatment, and finally obtaining ultra-high pressure sealing gaskets.

[0036] Preferably, step S2 is specifically as follows: first, a polytetrafluoroethylene film sheet is placed in the mold to flatten it, then an aramid fiber sheet is placed and the aramid fiber sheet is overlapped with the polytetrafluoroethylene film sheet, then a high-purity graphite sheet is placed and the high-purity graphite sheet is overlapped with the aramid fiber sheet, then a nano-silicon sheet is placed and the nano-silicon sheet is overlapped with the high-purity graphite sheet, and finally fluororubber is added and the fluororubber is overlapped with the nano-silicon, and then hot-pressed by a hot press, the hot-pressing temperature is set to 160-170°C, and the hot-pressing time is 20-30min to obtain a first-level sealing gasket product.

[0037] Preferably, step S3 specifically includes: placing the formed first-level sealing gasket product into an oven, setting the temperature to 150-160° C. for 2-4 hours, and obtaining a solidified second-level sealing gasket product after cooling.

[0038] Preferably, step S5 specifically includes: sending the primary sealing gasket into an electric furnace, setting the circuit temperature to 190-210° C. for 2-3 hours, and obtaining a secondary sealing gasket with internal stress eliminated after cooling.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] The present invention provides corrosion resistance and reduces chemical medium erosion by providing a corrosion-resistant layer, provides an anti-tear reinforcement layer to enhance the overall strength and improve the tear resistance, provides a core sealing layer to provide a sealing effect, provides a heat insulation layer to provide an excellent heat insulation effect, and provides a base layer to increase the supporting force and the overall high temperature and pressure resistance. Compared with traditional sealing gaskets, the present invention has more excellent corrosion resistance, sealing and tensile strength, and has certain heat resistance, which solves the problem of insufficient corrosion resistance, sealing and tensile strength of current ultra-high pressure sealing gaskets when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a schematic diagram of the cross-sectional structure of an ultra-high pressure sealing gasket described in an embodiment of the present invention;

[0042] Figure 2 is a schematic structural diagram of a surface coating machine described in an embodiment of the present invention;

[0043] Figure 3 The partial structure of the surface coating machine described in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0044] Figure 4 The partial structure of the surface coating machine described in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0045] Figure 5 is a schematic structural diagram of a coating portion described in an embodiment of the present invention;

[0046] Figure 6 is a schematic structural diagram of the rotating roller described in an embodiment of the present invention;

[0047] Description of reference numerals:

[0048] 10-corrosion resistant layer, 20-tear resistant reinforcement layer, 30-core sealing layer, 40-insulation layer, 50-base layer, 60-surface coating machine, 600-conveying part, 601-coating part, 602-discharging assembly, 603-coating assembly, 604-mounting frame, 605-first mounting bracket, 606-rotating roller, 607-first adjusting member, 608-first adjusting bolt, 609-first limiting sliding rod, 610-first nut, 611-connecting frame, 612-second mounting bracket, 613- Discharge pipe, 614-second adjusting piece, 615-second adjusting bolt, 616-second limiting slide rod, 617-second nut, 618-feed pipe, 619-discharge port, 620-mounting base plate, 621-mounting frame, 622-conveyor belt, 623-support frame, 624-mounting shell, 625-drive motor, 626-connecting roller, 627-mounting seat, 628-transmission member, 629-belt groove, 630-receiving hopper, 631-receiving box, 632-sliding plate, 633-pull-out handle. DETAILED DESCRIPTION

[0049] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0050] Example:

[0051] like Figure 1 As shown, this embodiment discloses an ultra-high pressure sealing gasket, comprising:

[0052] The corrosion-resistant layer 10 is used to provide corrosion resistance and reduce erosion by chemical media;

[0053] The tear-resistant reinforcement layer 20 is used to enhance the overall strength and improve the tear-resistant capability;

[0054] The core sealing layer 30 is used to provide a sealing effect;

[0055] The heat insulation layer 40 is used to provide excellent heat insulation effect;

[0056] Base layer 50, which is used to increase the support force and the overall high temperature and pressure resistance;

[0057] Among them, the corrosion-resistant layer 10, the tear-resistant reinforcement layer 20, the core sealing layer 30, the thermal insulation layer 40 and the base layer 50 are arranged in sequence, and the corrosion-resistant layer 10, the tear-resistant reinforcement layer 20, the core sealing layer 30, the thermal insulation layer 40 and the base layer 50 are formed as a whole through a lamination molding process.

[0058] The present invention provides corrosion resistance and reduces chemical medium erosion by providing a corrosion-resistant layer 10, provides a tear-resistant reinforcement layer 20 to enhance overall strength and improve tear resistance, provides a core sealing layer 30 to provide a sealing effect, provides a heat-insulating layer 40 to provide an excellent heat-insulating effect, and provides a base layer 50 to increase supporting force and overall high temperature and pressure resistance. Compared with traditional sealing gaskets, the present invention has more excellent corrosion resistance, sealing and tensile strength, and has certain heat resistance, which solves the problem of insufficient corrosion resistance, sealing and tensile strength of current ultra-high pressure sealing gaskets when in use.

[0059] The corrosion-resistant layer 10 is made of polytetrafluoroethylene film with a thickness of 0.5 mm.

[0060] The tear-resistant reinforcement layer 20 is made of aramid fiber and has a thickness of 1.0 mm.

[0061] The core sealing layer 30 is made of high-purity graphite and has a thickness of 2.0 mm.

[0062] The heat insulation layer 40 is made of nano-silicon and has a thickness of 1.5 mm.

[0063] The base layer 50 is made of fluororubber and has a thickness of 1.0 mm.

[0064] In order to facilitate the preparation of the ultra-high pressure sealing gasket described in the present invention, this embodiment provides an ultra-high pressure sealing gasket preparation process, which is used to prepare an ultra-high pressure sealing gasket described in any of the above items, comprising the following steps:

[0065] Step S1: material preparation;

[0066] Step S11: preparing polytetrafluoroethylene film;

[0067] Cut the polytetrafluoroethylene film into sheets with a length of Xmm, a width of Ymm, and a thickness of 0.5mm, and then set aside for later use;

[0068] Step S12: preparing aramid fiber;

[0069] Cut the aramid fiber into sheets with a length of Xmm, a width of Ymm and a thickness of 1.0mm, and then set aside for later use;

[0070] Step S13: preparing high-purity graphite;

[0071] High-purity graphite is pressed into shape by pressure, and cut into thin sheets with a length of Xmm, a width of Ymm, and a thickness of 2.0mm, and then placed for standby;

[0072] Step S14: nano-silicon preparation;

[0073] The nano-silicon is made into a thin sheet with a length of Xmm, a width of Ymm, and a thickness of 1.5mm, and then placed aside for later use.

[0074] Step S15: preparing fluororubber;

[0075] The fluororubber is pressed and formed by pressure, and cut into thin sheets with a length of Xmm, a width of Ymm, and a thickness of 1.0mm, and then placed for use;

[0076] Step S2: placing the polytetrafluoroethylene film sheet, aramid fiber sheet, high-purity graphite sheet, nano-silicon sheet and fluororubber sheet obtained in step S1 into a mold in sequence, and hot-pressing them into a finished primary sealing gasket by a hot press;

[0077] Step S3: placing the finished first-level sealing gasket into an oven for curing, and after cooling, obtaining a finished second-level sealing gasket;

[0078] Step S4: cutting the finished secondary sealing gasket into a shape with a length of X1mm and a width of Y1mm, and performing edge processing on the finished secondary sealing gasket to obtain a primary sealing gasket;

[0079] Step S5: sending the primary sealing gasket into an electric furnace for annealing, and obtaining a secondary sealing gasket after natural cooling;

[0080] Step S6: Perform quality inspection on the secondary sealing gasket, and send the qualified secondary sealing gasket to the surface coating machine 60 for surface coating treatment, so as to finally obtain the ultra-high pressure sealing gasket.

[0081] The length X and width Y in step S1 can be set according to the size of the hot press machine, and it is only necessary to ensure that the hot press machine can hot press it into shape.

[0082] The length X1 and the width Y1 in step S4 can be set according to the actual required dimensions.

[0083] The ultra-high pressure sealing gasket of the present invention can be prepared by the method of the present invention.

[0084] As a further preference, step S2 is specifically as follows: first, a polytetrafluoroethylene film sheet is placed in the mold to flatten it, then an aramid fiber sheet is placed and the aramid fiber sheet is overlapped with the polytetrafluoroethylene film sheet, then a high-purity graphite sheet is placed and the high-purity graphite sheet is overlapped with the aramid fiber sheet, then a nano-silicon sheet is placed and the nano-silicon sheet is overlapped with the high-purity graphite sheet, and finally fluororubber is added and the fluororubber is overlapped with the nano-silicon, and then hot-pressed by a hot press, the hot-pressing temperature is set to 160-170°C, and the hot-pressing time is 20-30min to obtain a first-level sealing gasket product.

[0085] As a further preferred embodiment, step S3 specifically comprises: placing the formed first-level sealing gasket product into an oven, setting the temperature to 150-160° C. for 2-4 hours, and obtaining a solidified second-level sealing gasket product after cooling.

[0086] As a further preference, step S4 specifically comprises: cutting the finished secondary sealing gasket into a shape with a length of X1mm and a width of Y1mm, performing edge processing on it to remove burrs at the cutting position and the surface, and polishing it to remove its sharp edges, thereby obtaining a primary sealing gasket.

[0087] As a further preference, step S5 specifically comprises: sending the primary sealing gasket into an electric furnace, setting the circuit temperature to 190-210° C. for 2-3 hours, and obtaining a secondary sealing gasket with internal stress eliminated after cooling.

[0088] As a further preference, step S6 specifically comprises: performing quality inspection on the secondary sealing gasket, sending the qualified secondary sealing gasket into the surface coating machine 60 for surface coating treatment, applying an anti-corrosion coating, and finally obtaining an ultra-high pressure sealing gasket.

[0089] As further preferred, in step S6, the specific steps of quality detection include:

[0090] Physical performance test:

[0091] Step S61: Performing a performance test on the sealing gasket according to ASTM D695 compressive strength and ASTM D412 tensile strength standards;

[0092] Step S62: High temperature resistance test:

[0093] Testing the performance of the qualified sealing gasket at 250° C. in step S61 to ensure that it can work in a high temperature environment;

[0094] Step S63: Chemical resistance test:

[0095] The performance of the qualified sealing gasket in the test step S62 when in contact with various chemical media is ensured that it will not fail or be damaged during use.

[0096] like Figures 2 to 3 As shown, in order to facilitate the transportation of ultra-high pressure sealing gaskets and the coating process of anti-corrosion coating, it is further preferred that the surface coating machine 60 includes a conveying part 600 and a coating part 601, and the coating part 601 is arranged on the conveying part 600 to complete the coating of the anti-corrosion coating, and the conveying part 600 is used to transport the ultra-high pressure sealing gasket to complete the coating process.

[0097] The coating part 601 includes a discharge assembly 602 and a coating assembly 603. The discharge assembly 602 is arranged on the coating assembly 603 and is located at the front end of the coating assembly 603. When the ultra-high pressure sealing gasket is conveyed by the conveying part 600, it first passes through the discharge assembly 602 and then passes through the coating assembly 603. The discharge assembly 602 is used to spray the anti-corrosion coating, and the coating assembly 603 is used to evenly apply the anti-corrosion coating.

[0098] The coating assembly 603 includes a mounting frame 604, a first mounting bracket 605 and a rotating roller 606. The bottom of the mounting frame 604 is detachably connected to both sides of the conveying part 600. The first mounting bracket 605 is arranged on the mounting frame 604 and is connected to the mounting frame 604 through a first adjusting member 607. The rotating roller 606 is arranged at the bottom of the first mounting bracket 605 and is rotatably connected to the first mounting bracket 605. The rotating roller 606 is arranged in cooperation with the conveying part 600 and can contact the ultra-high pressure sealing gasket.

[0099] In order to facilitate adapting to ultra-high pressure sealing gaskets of different thicknesses, the present embodiment is improved on the basis of the above embodiment, and the difference lies in that the first adjusting member 607 includes a first adjusting bolt 608 and a pair of first limiting slide bars 609, one end of the first adjusting bolt 608 passes through the mounting frame 604 and is rotatably connected to the top of the first mounting bracket 605, and a first nut 610 is provided on the mounting frame 604 to cooperate with the first adjusting bolt 608, the first nut 610 is fixedly connected to the mounting frame 604, the first adjusting bolt 608 is threadedly connected to the first nut 610, and is rotatably connected to the mounting frame 604, one end of a pair of first limiting slide bars 609 respectively passes through the mounting frame 604, and is fixedly connected to the first mounting bracket 605, and the first limiting slide bar 609 is slidably connected to the mounting frame 604.

[0100] When in use, the height of the first mounting bracket 605 can be adjusted by screwing the first adjusting bolt 608, and then the height of the rotating roller 606 can be adjusted to adapt to ultra-high pressure sealing gaskets of different thicknesses.

[0101] like Figures 4 to 5 As shown, the discharge assembly 602 includes a connecting frame 611, a second mounting bracket 612 and a discharge pipe 613. One end of the connecting frame 611 is fixedly connected to the first mounting bracket 605. The second mounting bracket 612 is connected to the connecting frame 611 through a second adjusting member 614. The discharge pipe 613 is fixedly arranged at the bottom of the second mounting bracket 612 and is arranged in cooperation with the conveying part 600.

[0102] In order to further facilitate adapting to ultra-high pressure sealing gaskets of different thicknesses, the present embodiment is improved on the basis of the above embodiment, and the difference is that the second adjusting member 614 includes a second adjusting bolt 615 and a pair of second limiting sliding rods 616, one end of the second adjusting bolt 615 passes through the connecting frame body 611 and is rotatably connected to the top of the second mounting bracket 612, and a second nut 617 is provided on the connecting frame body 611 to cooperate with the second adjusting bolt 615, and the second nut 617 is fixedly connected to the connecting frame body 611, the second adjusting bolt 615 is threadedly connected to the second nut 617, and is rotatably connected to the connecting frame body 611, one end of a pair of second limiting sliding rods 616 respectively passes through the connecting frame body 611, and is fixedly connected to the second mounting bracket 612, and the second limiting sliding rod 616 is slidably connected to the connecting frame body 611.

[0103] When in use, the height of the second mounting bracket 612 can be adjusted by screwing the second adjusting bolt 615, thereby adjusting the height of the discharge pipe 613, thereby achieving fine adjustment of the discharge pipe 613, further facilitating adaptation to ultra-high pressure sealing gaskets of different thicknesses.

[0104] like Figure 5 As shown, a pair of feed pipes 618 are provided on the discharge pipe 613, one end of the pair of feed pipes 618 is connected to the discharge pipe 613, and the other end passes through the second mounting bracket 612 and is arranged in cooperation with the second mounting bracket 612. The pair of feed pipes 618 can be externally connected to the anti-corrosion coating storage part, and a plurality of discharge ports 619 are provided at the bottom of the discharge pipe 613, one end of the discharge port 619 is connected to the discharge pipe 613, and the other end is arranged in cooperation with the ultra-high pressure sealing gasket.

[0105] When in use, the provision of a pair of feed pipes 618 can facilitate the feeding of the anti-corrosion coating, and the provision of a plurality of discharge ports 619 can facilitate the discharge of the anti-corrosion coating.

[0106] like Figures 2 to 3 As shown, the conveying part 600 includes a mounting base plate 620, a mounting frame 621, a conveyor belt 622 and a driving part. The mounting base plate 620 is mounted on the basic structure, the mounting frame 621 is fixedly arranged on the mounting base plate 620, the conveyor belt 622 and the driving part are cooperatively arranged on the mounting frame 621, and the driving part is used to drive the conveyor belt 622, and the conveyor belt 622 is used for conveying ultra-high pressure sealing gaskets.

[0107] The basic structure includes but is not limited to the ground and the mounting platform.

[0108] The mounting frame 621 includes a pair of supporting frames 623 and a pair of mounting shells 624. The pair of supporting frames 623 are respectively arranged on both sides of the mounting base plate 620, and the bottom is fixedly connected to the top of the mounting base plate 620. The pair of mounting shells 624 are fixedly arranged on the pair of supporting frames 623, and there is an installation space between the pair of mounting shells 624. The conveyor belt 622 is arranged in the installation space and is gap-matched with the pair of mounting shells 624. The driving part is cooperatedly arranged on one of the supporting frames 623 and is used to drive the conveyor belt 622.

[0109] The driving part includes a driving motor 625 and three connecting rollers 626. The three connecting rollers 626 are arranged in the installation space. The two ends of the connecting rollers 626 are respectively rotatably connected to a pair of installation shells 624, wherein two connecting rollers 626 are respectively located at the two ends of the installation space, and the other connecting roller 626 is matched with the rotating roller 606. The conveyor belt 622 is sleeved on the three connecting rollers 626 and is transmitted with the three connecting rollers 626 through friction. The driving motor 625 is arranged on one of the supporting frames 623 and is fixedly connected to the supporting frame 623 through a mounting seat 627. The output shaft of the driving motor 625 is transmitted to one of the connecting rollers 626 through a transmission member 628.

[0110] When in use, the driving motor 625 drives one of the connecting rollers 626 to rotate, thereby driving the conveyor belt 622 to realize the conveyance of the ultra-high pressure sealing gasket.

[0111] The transmission member 628 includes a driving wheel and a driven wheel. The driving wheel is fixedly arranged on the output shaft of the driving motor 625, and the driven wheel is fixedly arranged on one of the connecting rollers 626. The driving wheel and the driven wheel bracket are driven by a transmission belt.

[0112] The transmission belt and the driving wheel and the driven wheel can be transmitted through friction or meshing. For details, please refer to the pulley transmission in the prior art.

[0113] The conveyor belt 622 includes a plurality of belt bodies, which are arranged in a coordinated manner, and the belt bodies located on both sides are respectively gap-matched with a pair of mounting shells 624 .

[0114] like Figure 6 As shown, the connecting roller 626 is provided with a belt groove 629 which is arranged to cooperate with the belt body. The belt body is sleeved in the belt groove 629 and cooperates with the belt groove 629 for transmission through friction force.

[0115] The conveyor belt 622 is configured as a plurality of belt bodies, so that the excess anti-corrosion coating can be easily dropped from the gaps between the plurality of belt bodies.

[0116] like Figure 4As shown, a pair of mounting shells 624 are provided with a receiving hopper 630 at the bottom, and a receiving port is provided at the upper end of the receiving hopper 630. The receiving port is cooperated with the discharge pipe 613 and the rotating roller 606 to collect excess anti-corrosion paint. A discharge port is provided at the bottom of the receiving hopper 630, and a receiving box 631 is provided below the discharge port. The anti-corrosion paint can be received by the receiving port and then discharged from the discharge port into the receiving box 631, thereby completing the collection.

[0117] A sliding groove is provided on the mounting base 620 , a sliding plate 632 is provided in the sliding groove, the sliding plate 632 is slidably connected to the sliding groove, the material receiving box 631 is arranged on the sliding plate 632 , a pull-out handle 633 is provided on one side of the sliding plate 632 , and the pull-out handle 633 is fixedly connected to the sliding plate 632 .

[0118] When in use, the setting of the receiving hopper 630 and the receiving box 631 can facilitate the collection of excess anti-corrosion paint, thereby reducing the impact of the anti-corrosion paint falling on the mounting base 620 on the working environment. The setting of the sliding plate 632 can facilitate the movement of the receiving box 631, thereby facilitating the transfer of the anti-corrosion paint in the receiving box 631.

[0119] Working principle of the present invention:

[0120] The present invention provides corrosion resistance and reduces chemical medium erosion by setting a corrosion-resistant layer 10, enhances overall strength and improves tear resistance by setting a tear-resistant reinforcement layer 20, provides a sealing effect by setting a core sealing layer 30, provides an excellent heat-insulating effect by setting a heat-insulating layer 40, and increases supporting force and overall high temperature and pressure resistance by setting a base layer 50. Compared with traditional sealing gaskets, the present invention has more excellent corrosion resistance, sealing and tensile strength, and has certain heat resistance.

[0121] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An ultra-high pressure sealing gasket, characterized in that: include: A corrosion-resistant layer (10), the corrosion-resistant layer (10) is used to provide corrosion resistance and reduce erosion by chemical media; The tear-resistant reinforcement layer (20) is used to enhance the overall strength and improve the tear-resistant capability; A core sealing layer (30), the core sealing layer (30) is used to provide a sealing effect; A heat insulation layer (40), the heat insulation layer (40) is used to provide excellent heat insulation effect; A base layer (50), the base layer (50) is used to increase the supporting force and the overall high temperature and pressure resistance; The corrosion-resistant layer (10), the tear-resistant reinforcement layer (20), the core sealing layer (30), the heat-insulating layer (40) and the base layer (50) are arranged in sequence, and the corrosion-resistant layer (10), the tear-resistant reinforcement layer (20), the core sealing layer (30), the heat-insulating layer (40) and the base layer (50) are formed into a whole through a lamination molding process.

2. The ultra-high pressure sealing gasket according to claim 1, characterized in that: The corrosion-resistant layer (10) is made of polytetrafluoroethylene film with a thickness of 0.5 mm.

3. The ultra-high pressure sealing gasket according to claim 2, characterized in that: The tear-resistant reinforcement layer (20) is made of aramid fiber and has a thickness of 1.0 mm.

4. The ultra-high pressure sealing gasket according to claim 3, characterized in that: The core sealing layer (30) is made of high-purity graphite and has a thickness of 2.0 mm.

5. The ultra-high pressure sealing gasket according to claim 4, characterized in that: The heat insulation layer (40) is made of nano silicon and has a thickness of 1.5 mm.

6. The ultra-high pressure sealing gasket according to claim 5, characterized in that: The base layer (50) is made of fluororubber and has a thickness of 1.0 mm.

7. A process for preparing an ultra-high pressure sealing gasket, characterized in that: The method for preparing an ultra-high pressure sealing gasket according to any one of claims 1 to 6 comprises the following steps: Step S1: material preparation; Step S11: preparing polytetrafluoroethylene film; Cut the polytetrafluoroethylene film into sheets with a length of Xmm, a width of Ymm, and a thickness of 0.5mm, and then set aside for later use; Step S12: preparing aramid fiber; Cut the aramid fiber into sheets with a length of Xmm, a width of Ymm and a thickness of 1.0mm, and then set aside for later use; Step S13: preparing high-purity graphite; High-purity graphite is pressed into shape by pressure, and cut into thin sheets with a length of Xmm, a width of Ymm, and a thickness of 2.0mm, and then placed for standby; Step S14: nano-silicon preparation; The nano-silicon is made into a thin sheet with a length of Xmm, a width of Ymm, and a thickness of 1.5mm, and then placed aside for later use. Step S15: preparing fluororubber; The fluororubber is pressed and formed by pressure, and cut into thin sheets with a length of Xmm, a width of Ymm, and a thickness of 1.0mm, and then placed for use; Step S2: placing the polytetrafluoroethylene film sheet, aramid fiber sheet, high-purity graphite sheet, nano-silicon sheet and fluororubber sheet obtained in step S1 into a mold in sequence, and hot-pressing them into a finished primary sealing gasket by a hot press; Step S3: placing the finished first-level sealing gasket into an oven for curing, and after cooling, obtaining a finished second-level sealing gasket; Step S4: cutting the finished secondary sealing gasket into a shape with a length of X1mm and a width of Y1mm, and performing edge processing on the finished secondary sealing gasket to obtain a primary sealing gasket; Step S5: sending the primary sealing gasket into an electric furnace for annealing, and obtaining a secondary sealing gasket after natural cooling; Step S6: Performing a quality inspection on the secondary sealing gasket, and sending the qualified secondary sealing gasket to a surface coating machine (60) for surface coating treatment, thereby finally obtaining an ultra-high pressure sealing gasket.

8. The process for preparing an ultra-high pressure sealing gasket according to claim 7, characterized in that: Step S2 is specifically as follows: first, a polytetrafluoroethylene film sheet is placed in the mold to make it flat, then an aramid fiber sheet is placed and the aramid fiber sheet is overlapped with the polytetrafluoroethylene film sheet, then a high-purity graphite sheet is placed and the high-purity graphite sheet is overlapped with the aramid fiber sheet, then a nano-silicon sheet is placed and the nano-silicon sheet is overlapped with the high-purity graphite sheet, and finally fluororubber is added and the fluororubber is overlapped with the nano-silicon, and then hot-pressed by a hot press, the hot-pressing temperature is set to 160-170°C, and the hot-pressing time is 20-30min to obtain a first-level sealing gasket product.

9. The process for preparing an ultra-high pressure sealing gasket according to claim 8, characterized in that: Step S3 is specifically as follows: placing the formed first-level sealing gasket product into an oven, setting the temperature to 150-160° C. for 2-4 hours, and obtaining a solidified second-level sealing gasket product after cooling.

10. The process for preparing an ultra-high pressure sealing gasket according to claim 9, characterized in that: Step S5 is specifically as follows: sending the primary sealing gasket into an electric furnace, setting the circuit temperature to 190-210° C. for 2-3 hours, and obtaining a secondary sealing gasket with internal stress eliminated after cooling.

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