Reliable plane sealing device capable of automatically opening and closing gas circuit

Abstract

The utility model belongs to the technical field of gas pipeline connection, and particularly relates to a reliable plane sealing device capable of automatically opening and closing a gas circuit, which comprises an upper joint and a lower joint, the upper joint comprises a sealing plate, an upper gland and a filtering assembly; the lower connector comprises a lower portion gland, an upper portion parallelism adjusting assembly, a reflection type dustproof assembly, a lower portion parallelism adjusting assembly, an opening and closing mandrel outer sleeve, an opening and closing mandrel, a large-diameter disc spring assembly, an automatic ash discharging type installation shell, a disc spring assembly dustproof ring, a slag discharging hole and an online cleaning embedded type air valve assembly. The ventilation mandrel structurally adopts a two-section type design, during working, the opening and closing mandrel can reciprocate along the axis of the opening and closing mandrel outer sleeve, and the contact surface between the opening and closing mandrel outer sleeve and the opening and closing mandrel outer sleeve is a sealing surface, so that after the sealing surfaces are separated, a gas path can be actively opened, and after working is stopped, the sealing surfaces are connected, and at the moment, the gas path is actively closed and automatically opened and closed, and the use is better.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of gas pipeline connection, and particularly relates to a reliable plane sealing device capable of automatically opening and closing a gas circuit. BACKGROUND

[0002] In the steel smelting industry, inert gas blowing at the bottom of a molten steel ladle is a common means of secondary refining. When a discrete molten steel ladle is lifted onto a molten steel transport vehicle, the gas supply pipeline on the vehicle body needs to be connected to the gas pipeline on the ladle body, so that the gas blowing process can be carried out.

[0003] Currently, there are four types of pipeline connection methods: the first type is a traditional sub-mother structure type quick plug that requires worker operation; the second type is a mushroom head structure type docking device that does not require worker operation, but its structure and installation position have obvious defects, which can easily be damaged and cause gas leakage, and the use effect is very poor; the third type is a fixed plane sealing structure type docking device that also does not require worker operation, but this method has the following main problems: first, due to permanent deformation of the upper and lower installation bases during long-term use, the shape and position are distorted, and the upper and lower sealing mechanisms only have vertical displacement without adjustable inclination angle, so the sealing is not tight, causing gas leakage; second, multiple disc spring mechanisms are used, and due to space limitations, the stiffness coefficient of the disc springs is limited by the multiple design, so after compression, the force can only meet the gas pressure strength in most main pipelines, and cannot meet the use condition of increased gas pressure in the main pipeline due to blockage at the gas use point, which causes gas leakage at this time; third, the fatigue life of the disc springs is limited, and the disc springs fail after 6000 cycles of service life, so the disc springs need to be replaced, which is not conducive to continuous production; fourth, the effective compression stroke of the lower part is short, generally only 6-10 mm, and when the molten steel transport vehicle has serious slag accumulation, a gap exists between the support surface of the molten steel ladle and the support surface of the molten steel transport vehicle, the deformation of the disc springs is small, and the disc springs cannot provide enough force to ensure pipeline sealing, which is prone to leakage.

[0004] On October 19, 2020, we applied for a "parallelism self-adjusting plane sealing device" (patent number ZL202020247617.4), which solved the drawbacks of the above three types of products and could be normally used in the molten steel ladle bottom blowing process, but through the use of various scenes in recent years, we found that the technology and reliability of this product could be technically created and improved, and the use effect, service life, self-opening and closing gas circuit technology design, more scientific protection design, more ingenious maintenance-free technology, and more convenient dust cleaning technology could be greatly improved.

[0005] Therefore, the utility model newly puts forward a reliable plane sealing device capable of automatically opening and closing a gas circuit. SUMMARY

[0006] In order to solve the above-mentioned problems existing in the prior art, the utility model provides a reliable planar sealing device that can autonomously open and close the air path. It is designed with an autonomous opening and closing air path, and the ventilation core shaft structure adopts a two-stage design. When working, the opening and closing core shaft can move back and forth along the axis of the opening and closing core shaft outer sleeve, and the contact surface between the two is a sealing surface. Therefore, after the sealing surfaces are separated, the air path can be actively opened, and after stopping working, the sealing surfaces are connected. At this time, the air path is actively closed and automatically opened and closed, which is better to use.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a reliable plane sealing device capable of autonomously opening and closing an air path, comprising an upper joint and a lower joint;

[0008] The upper joint includes a sealing plate, an upper gland and a filter assembly;

[0009] The upper end of the sealing plate is fixedly mounted with an upper gland by a fixing screw, and a filter assembly is movably mounted inside the upper end of the sealing plate;

[0010] The lower joint includes a lower gland, an upper parallelism adjustment assembly, a reflective dustproof assembly, a lower parallelism adjustment assembly, an opening and closing mandrel outer sleeve, an opening and closing mandrel, a large-diameter disc spring assembly, an automatic dust discharge installation housing, a disc spring assembly dustproof ring, a slag discharge hole, and an online cleaning embedded valve assembly;

[0011] The inner part of the lower gland is movably installed with an upper parallelism adjusting assembly, the upper end of the upper parallelism adjusting assembly is movably installed with a reflective dustproof assembly through fixed screws, the upper end of the upper parallelism adjusting assembly is provided with a dovetail groove, the dovetail groove is movably installed with a high-temperature-resistant O-shaped ring, a plurality of exhaust holes are formed in the outer part of the upper end of the upper parallelism adjusting assembly and the exhaust holes are communicated with the dovetail groove, the inner part of the lower gland is movably installed with a lower parallelism adjusting assembly and the lower parallelism adjusting assembly is located below the upper parallelism adjusting assembly, an opening and closing mandrel sleeve is fixedly welded at the middle position of the bottom end of the lower parallelism adjusting assembly, an O-shaped sealing ring is movably installed at the bottom end inner wall of the opening and closing mandrel sleeve, a lip dustproof ring is movably installed at the bottom end inner wall of the opening and closing mandrel sleeve and the lip dustproof ring is located below the O-shaped sealing ring, an opening and closing mandrel is movably installed in the opening and closing mandrel sleeve, a plurality of air holes are formed in the outer part of the upper end of the opening and closing mandrel, the bottom end of the lower gland is welded with an automatic dust discharging type installation shell, a disc spring assembly dustproof ring is fixedly connected at the inner bottom end of the automatic dust discharging type installation shell, the bottom end of the lower parallelism adjusting assembly is movably connected with the automatic dust discharging type installation shell and the disc spring assembly dustproof ring, a large-diameter disc spring assembly is movably installed in the disc spring assembly dustproof ring, the opening and closing mandrel sleeve penetrates through the large-diameter disc spring assembly, the bottom end of the opening and closing mandrel penetrates out of the bottom end of the automatic dust discharging type installation shell, an opening and closing mandrel fixing part is screw-connected at the bottom end of the opening and closing mandrel and is located below the automatic dust discharging type installation shell, a plurality of slag discharge holes are formed in the bottom end of the automatic dust discharging type installation shell, and an online cleaning embedded air valve assembly is movably installed at the inner right side of the automatic dust discharging type installation shell.

[0012] As a reliable plane sealing device capable of automatically opening and closing the air path, the bottom end of the upper gland is movably installed with a purple copper sealing pad.

[0013] As a reliable plane sealing device capable of automatically opening and closing the air path, the upper end of the sealing plate is movably installed with a heat insulation pad.

[0014] As a reliable plane sealing device capable of automatically opening and closing the air path, the bottom end of the sealing plate is movably installed with a heat insulation pad.

[0015] As a reliable plane sealing device capable of automatically opening and closing the air path, the number of disc springs in the large-diameter disc spring assembly is eight to ten, the diameter is 120mm to 180mm, and the fatigue life is not less than 300,000 times.

[0016] As a reliable plane sealing device of the utility model discloses a preferred technical scheme of the self -opening and closing air path, the vent hole is provided with three layers, each layer is annular equidistant distribution, and the number of each layer is four to six.

[0017] As a reliable plane sealing device of the utility model discloses a preferred technical scheme of the self -opening and closing air path, the vent hole is provided with four, and the diameter is 3mm.

[0018] As a reliable plane sealing device of the utility model discloses a preferred technical scheme of the self -opening and closing air path, the hole diameter of the slag hole is 16mm to 30mm, and the number is two to sixteen.

[0019] Compared with the prior art, the utility model has the beneficial effects that:

[0020] 1、The lower joint of the utility model discloses a self -opening and closing air path, and the vent core shaft structure adopts two -segment design, and when working, the opening and closing core shaft can reciprocate along the axis of the opening and closing core shaft outer sleeve, and the contact surface between the two is a sealing surface, so that the sealing surface is separated, and the air path can be actively opened, and when stopping working, the sealing surface is connected, and the air path is actively closed.

[0021] 2、The lower joint of the utility model discloses a closed disc spring cavity structure, can prevent dust in all directions, and the external dust is not easy to enter the internal, and further invades the large diameter disc spring assembly, can prevent the gap between the disc spring sheets from being filled, and the compression stroke is shortened, and the air leakage of the abutting sealing surface is prevented.

[0022] 3、The lower joint of the utility model discloses an automatic ash removal type installation shell, and the bottom of the lower joint is provided with a slag hole, when dust enters, most of the dust will be discharged from the slag hole, and a small amount of dust will be accumulated between the adjacent two slag holes, but does not affect the use of the disc spring, and the small amount of accumulated dust will not be accumulated indefinitely, and when accumulated to a certain time, will be discharged from the slag hole.

[0023] 4、The lower joint of the utility model discloses a dismounting ash cleaning function, and an online cleaning embedded air valve assembly is designed on the automatic ash removal type installation shell, and the molten steel transport vehicle can use the external air source to blow from the online cleaning embedded air valve assembly without being offline, and the high-pressure gas enters the inside of the automatic ash removal type installation shell, and can assist the dust accumulated in the inside of the automatic ash removal type installation shell to be blown out from the slag hole, so that the equipment is more stable in use.

[0024] 5、The high-temperature-resistant O-shaped ring of the lower joint adopts a anti-falling groove design, in the normal use process of the high-temperature-resistant O-shaped ring, when the upper part parallelism adjusting assembly is extruded, the high-temperature-resistant O-shaped ring will retract into the sealing groove, and due to the dovetail groove form design of the sealing groove, the air in the internal gap of the dovetail groove is compressed in the retraction process, when the upper joint is separated from the lower joint, the high-temperature-resistant O-shaped ring releases the rebound, and at this time, the air in the internal gap of the dovetail groove is compressed to generate the air spring effect, the high-temperature-resistant O-shaped ring is bounced out of the dovetail groove, and the high-temperature-resistant O-shaped ring is easily damaged by the upper joint in the next docking, and the exhaust hole is further designed on the outer ring of the dovetail groove, the air in the gap is discharged outside the dovetail groove when the high-temperature-resistant O-shaped ring is compressed back to the dovetail groove, so that the air spring phenomenon is prevented.

[0025] 6、The upper joint adopts the maintenance-free dust prevention technology, the filtering precision is high, the triple filter element is integrated on the inner portion of the upper end of the sealing plate, special air duct design is adopted, when the gas passes through the filtering assembly, the filtering assembly generates self-vibration, dust cannot be adhered and connected, the gas passage cannot be blocked, cleaning is not needed in actual use, long-term use is achieved, the use effect of the valve and the air brick installed on the steel ladle is effectively ensured, and the phenomena of being blocked and stuck due to blowing of large particle impurities are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation to the present application. In the drawings:

[0027] Figure 1 It is a cross-sectional structure schematic view of the present application;

[0028] Figure 2 It is a cross-sectional structure schematic view of the upper joint of the present application;

[0029] Figure 3 It is a local explosion cross-sectional structure schematic view of the lower joint of the present application;

[0030] Figure 4 It is a connecting cross-sectional structure schematic view of the lower gland, the upper part parallelism adjusting assembly of the present application;

[0031] Figure 5 It is a connecting cross-sectional structure schematic view of the lower part parallelism adjusting assembly, the opening and closing core shaft sleeve and the opening and closing core shaft of the present application;

[0032] Figure 6 It is a cross-sectional structure schematic view of the automatic dust discharging type installation shell of the present application.

[0033] In the figure: 1, sealing plate; 2, upper gland; 3, fixing screw one; 4, red copper sealing gasket; 5, filter assembly; 6, heat insulation pad; 7, mounting counterbore; 8, lower gland; 9, upper parallelism adjusting assembly; 10, reflective dustproof assembly; 11, fixing screw two; 12, dovetail groove; 13, high-temperature-resistant O-shaped ring; 14, exhaust hole; 15, lower parallelism adjusting assembly; 16, opening and closing mandrel outer sleeve; 17, O-shaped sealing ring; 18, lip dustproof ring; 19, opening and closing mandrel; 20, air hole; 21, large-diameter disc spring assembly; 22, automatic ash discharge type mounting shell; 23, disc spring assembly dustproof ring; 24, slag discharge hole; 25, online cleaning embedded air valve assembly; 26, opening and closing mandrel fixing piece. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. EMBODIMENT

[0035] Please refer to Figures 1-6 The present application provides the following technical solutions: a reliable planar sealing device capable of automatically opening and closing a gas circuit, comprising an upper joint and a lower joint.

[0036] The upper joint is composed of a sealing plate 1, an upper gland 2, a fixing screw one 3, a red copper sealing gasket 4, a filter assembly 5, a heat insulation pad 6, and a mounting counterbore 7.

[0037] The lower joint is composed of a lower gland 8, an upper parallelism adjusting assembly 9, a reflective dustproof assembly 10, a fixing screw two 11, a dovetail groove 12, a high-temperature-resistant O-shaped ring 13, an exhaust hole 14, a lower parallelism adjusting assembly 15, an opening and closing mandrel outer sleeve 16, an O-shaped sealing ring 17, a lip dustproof ring 18, an opening and closing mandrel 19, an air hole 20, a large-diameter disc spring assembly 21, an automatic ash discharge type mounting shell 22, a disc spring assembly dustproof ring 23, a slag discharge hole 24, an online cleaning embedded air valve assembly 25, and an opening and closing mandrel fixing piece 26.

[0038] Refer to Figure 1 and Figure 2As shown, further, in the upper joint part: the upper gland 2 is fixedly connected with the upper middle part of the sealing plate 1 by the fixing screw 3, and the upper gland 2 is assembled into an integral whole; the bottom end of the upper gland 2 is embeddedly installed with the copper sealing gasket 4 around the circumference; the upper gland 2 is sealed with the copper sealing gasket 4 on the bonding surface; the filter assembly 5 is movably installed in the V-shaped cavity formed by the upper gland 2 and the sealing plate 1, and has a small assembly gap, so that the filter assembly 5 can move up and down at the installation step at the upper end of the V-shaped cavity; the heat insulation pad 6 is fixedly installed at the upper end of the sealing plate 1; four installation counterbores 7 are formed around the circumference of the sealing plate 1; when the user uses the technical product, the installation screw can be used to connect the assembly with the receptor device from the four installation counterbores 7; and the heat insulation pad 6 can reduce the temperature of the lower surface of the sealing plate 1.

[0039] Referring to Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, further, in the lower joint part: the bottom of the disc spring assembly dustproof ring 23 is welded and assembled with the inner bottom of the automatic dust discharging type installation shell 22;

[0040] The large-diameter disc spring assembly 21 is put into the inside of the disc spring assembly dustproof ring 23 in a double-stacking series connection, and generally has eight to ten disc springs with a diameter of 120mm to 180mm and a fatigue life of not less than 300,000 times;

[0041] The lower end of the lower parallelism adjusting assembly 15 has a spherical convex, and the center is a through hole as an air passage; the inner wall diameter of the bottom end of the lower parallelism adjusting assembly 15 is slightly larger than the outer diameter size of the disc spring assembly dustproof ring 23, so that when the lower parallelism adjusting assembly 15 moves up and down, the dust cannot enter the large-diameter disc spring assembly 21;

[0042] The opening and closing shaft 19 is inserted from the upper end of the opening and closing shaft sleeve 16, and the spherical structure sealing surfaces of the two are in contact; the bottom end of the opening and closing shaft 19 is embeddedly installed with an O-shaped sealing ring 17, which can ensure the sliding sealing between the outer wall of the opening and closing shaft 19 and the inner wall of the opening and closing shaft sleeve 16; the lip dustproof ring 18 is embeddedly installed at the bottom end of the opening and closing shaft sleeve 16, which is used for dust prevention; the upper end of the opening and closing shaft 19 is provided with upper, middle and lower three layers of air holes 20, and each layer has four to six air holes 20 which are uniformly distributed along the axis circumference; the air holes 20 are used as air passages;

[0043] When the opening and closing shaft 19 and the opening and closing shaft sleeve 16 are assembled, the upper end of the opening and closing shaft sleeve 16 is welded with the inner bottom surface of the lower parallelism adjusting assembly 15, and the center hole of the lower parallelism adjusting assembly 15 is coaxial;

[0044] After the assembly of the lower parallelism adjusting assembly 15, the opening and closing shaft sleeve 16 and the opening and closing shaft 19 is completed, the opening and closing shaft sleeve 16 and the opening and closing shaft 19 pass through the inner hole of the large-diameter disc spring assembly 21 and the bottom through hole of the automatic ash discharge type mounting shell 22, then the inner threaded opening of the opening and closing shaft fixing piece 26 is screwed to the bottom outer threaded end of the opening and closing shaft 19 to the end face, and the opening and closing shaft fixing piece 26 can be further fixed and connected with the automatic ash discharge type mounting shell 22 through a screw;

[0045] The upper end of the upper parallelism adjusting assembly 9 is provided with a dovetail groove 12, four Ø3mm exhaust holes 14 are uniformly distributed in the circumferential direction around the dovetail groove 12, and a high-temperature-resistant O-shaped ring 13 is embedded and installed in the dovetail groove 12; when the high-temperature-resistant O-shaped ring 13 is compressed back into the dovetail groove 12, the air in the gap between the two is discharged from the exhaust holes 14, so that the air spring effect is avoided; the reflective dustproof assembly 10 is assembled with the upper end of the lower gland 8 through the second fixing screw 11, and plays a dustproof role on the air port of the upper parallelism adjusting assembly 9; the lower surface of the upper parallelism adjusting assembly 9 is provided with a spherical concave shape in the middle, which is matched and sealed with the spherical convex shape of the lower parallelism adjusting assembly 15, and a certain gap is formed at the two end faces, so that the upper parallelism adjusting assembly 9 can be adjusted at an angle of 1 to 5° within the circumferential range of the center of the concave-convex contact surface;

[0046] The bottom end of the lower gland 8 is welded and connected with the upper end of the automatic ash discharge type mounting shell 22, and the upper parallelism adjusting assembly 9, the lower parallelism adjusting assembly 15 and the automatic ash discharge type mounting shell 22 are assembled into a whole through the lower gland 8;

[0047] The bottom end of the automatic ash discharge type mounting shell 22 is provided with a plurality of slag discharge holes 24, the diameter of the slag discharge holes 24 is 16mm to 30mm, and the number is two to sixteen; the online cleaning embedded air valve assembly 25 is embedded and installed in the right side of the automatic ash discharge type mounting shell 22.

[0048] The design of the self-opening and closing air path technical scheme of the utility model is as follows: when the upper parallelism adjusting assembly 9 is forced to move downward, the lower parallelism adjusting assembly 15 and the opening and closing shaft sleeve 16 are driven to move downward and compress the large-diameter disc spring assembly 21; at this time, the concave sealing surface of the opening and closing shaft sleeve 16 is separated from the convex sealing surface of the opening and closing shaft 19, the gas enters the opening and closing shaft sleeve 16 from the air hole 20 at the upper end of the opening and closing shaft 19, and then enters the middle hole of the upper parallelism adjusting assembly 9 from the middle hole of the lower parallelism adjusting assembly 15, so as to flow into the upper joint, at this time, the air path is opened; when the upper parallelism adjusting assembly 9 is not subjected to external pressure, at this time, the opening and closing shaft 19 is reset with the upward movement of the lower parallelism adjusting assembly 15; at this time, the concave sealing surface of the opening and closing shaft sleeve 16 is in contact with the convex sealing surface of the opening and closing shaft 19, and remains sealed under the assembly static tension of the opening and closing shaft fixing piece 26; at this time, the air path is closed.

[0049] The dustproof technical scheme of the disc spring comprises a disc spring assembly 21, a lower parallelism adjusting assembly 15, a dustproof ring 23, a dustproof cover 24 and a dustproof cover 25.

[0050] The technical scheme of the slag discharge of the utility model discloses a bottom of the automatic dust discharging type installation shell 22 is evenly distributed with a circle of slag discharge holes 24, the slag discharge hole 24 is between the outer circle of the disc spring assembly dustproof ring 23 and the annular gap formed by the inner wall of the automatic dust discharging type installation shell 22, when the dust enters the gap, it is automatically discharged outside the equipment from the slag discharge hole 24 under the action of gravity.

[0051] The technical scheme of the dust cleaning without disassembly of the utility model discloses that the online cleaning embedded air valve assembly 25 is a one-way air valve core installed on the shell of the automatic dust discharging type installation shell 22, the core is in the closed state when not in use, and the core can be opened by blowing high-pressure gas from the external air hole when in use, so that the gas enters the annular gap formed by the outer circle of the disc spring assembly dustproof ring 23 and the inner wall of the automatic dust discharging type installation shell 22, and the residual dust at the bottom is discharged from the slag discharge hole 24, thereby achieving the dust cleaning without disassembly.

[0052] In addition, the high-temperature-resistant O-shaped ring 13 of the lower joint of the utility model adopts a anti-falling groove design, in the normal use process, when the high-temperature-resistant O-shaped ring 13 is extruded, the high-temperature-resistant O-shaped ring 13 will retract into the sealing groove, and because the sealing groove adopts the dovetail groove 12 form design, the air in the gap of the dovetail groove 12 is compressed in the retraction process, when the upper joint leaves the lower joint, the high-temperature-resistant O-shaped ring 13 releases the rebound, and at this time, the air in the gap of the dovetail groove 12 is compressed, and the air spring effect will make the high-temperature-resistant O-shaped ring 13 pop out of the dovetail groove 12, which is easy to be pressed and damaged by the upper joint in the next docking, in view of this problem, the utility model further designs the air vent 14 on the outer circle of the dovetail groove 12, which can discharge the air in the gap of the dovetail groove 12 outside the dovetail groove 12 when the high-temperature-resistant O-shaped ring 13 is compressed, thereby preventing the air spring phenomenon from occurring.

[0053] The upper joint of the utility model adopts the dustproof technology without maintenance, the filtration precision is high, the triple filter element is integrated on the inner top of the sealing plate 1, special air duct design is adopted, when the gas passes through the filter assembly 5, the filter assembly 5 generates self-vibration, the dust cannot be adhered and connected, the gas channel cannot be blocked, and in actual use, it can be used for a long time without cleaning, the use effect of the valve and the air brick installed on the steel ladle is effectively guaranteed, and the phenomenon of being blocked and stuck due to blowing in large particle impurities does not occur.

[0054] In addition, the contents not described in detail in the embodiments are in the category of prior art and common knowledge.

[0055] Finally, it should be noted that: the above is only the preferred embodiments of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A reliable plane sealing device capable of autonomously opening and closing an air path, characterized in that: including an upper joint and a lower joint; The upper joint comprises a sealing plate (1), an upper gland (2) and a filter assembly (5); The upper end of the sealing plate (1) is fixedly mounted with an upper gland (2) via a fixing screw (3), and a filter assembly (5) is movably mounted inside the upper end of the sealing plate (1); The lower joint includes a lower gland (8), an upper parallelism adjustment assembly (9), a reflective dustproof assembly (10), a lower parallelism adjustment assembly (15), an opening and closing mandrel outer sleeve (16), an opening and closing mandrel (19), a large-diameter disc spring assembly (21), an automatic dust discharge installation housing (22), a disc spring assembly dustproof ring (23), a slag discharge hole (24) and an online cleaning embedded valve assembly (25); The upper parallelism adjustment component (9) is movably installed inside the lower pressure cover (8), and a reflective dustproof component (10) is fixedly installed inside the upper end of the upper parallelism adjustment component (9) through a fixing screw (11). The upper end of the upper parallelism adjustment component (9) is provided with a dovetail groove (12), and a high-temperature resistant O-ring (13) is embedded in the dovetail groove (12). A plurality of exhaust holes (14) are provided around the outer periphery of the upper end of the upper parallelism adjustment component (9), and the exhaust holes (14) are communicated with the dovetail groove (12). The lower pressure cover (8) The lower parallelism adjustment component (15) is movably installed inside the lower parallelism adjustment component (15) and is located below the upper parallelism adjustment component (9). The middle position of the bottom end of the lower parallelism adjustment component (15) is fixedly welded with an opening and closing core shaft sleeve (16). The bottom inner wall of the opening and closing core shaft sleeve (16) is fitted with an O-type sealing ring (17). The bottom inner wall of the opening and closing core shaft sleeve (16) is fitted with a lip dust ring (18) and the lip dust ring (18) is located below the O-type sealing ring (17). The inside of the opening and closing core shaft sleeve (16) An opening and closing core shaft (19) is movably installed, and a plurality of vent holes (20) are opened around the upper end of the opening and closing core shaft (19). The bottom end of the lower pressure cover (8) is welded and fixed with an automatic ash discharge type installation shell (22), and the inner bottom end of the automatic ash discharge type installation shell (22) is fixedly connected with a disc spring assembly dust ring (23), and the bottom end of the lower parallelism adjustment component (15) is movably connected with the automatic ash discharge type installation shell (22) and the disc spring assembly dust ring (23), and a large-diameter disc spring component (21) is movably installed inside the disc spring assembly dust ring (23). The opening and closing core shaft sleeve (16) passes through the large diameter disc spring assembly (21), and the bottom end of the opening and closing core shaft (19) passes through the bottom end of the automatic ash discharge type installation shell (22), and the opening and closing core shaft fixing part (26) is screwed and connected to the outside of the bottom end of the opening and closing core shaft (19), and the opening and closing core shaft fixing part (26) is located below the automatic ash discharge type installation shell (22). The bottom end of the automatic ash discharge type installation shell (22) is provided with a plurality of slag discharge holes (24), and the right side of the automatic ash discharge type installation shell (22) is embedded with an online cleaning embedded valve assembly (25).

2. A reliable plane sealing device capable of autonomously opening and closing an air path according to claim 1, characterized in that: A copper sealing gasket (4) is embedded and installed around the bottom end of the upper pressure cover (2).

3. A reliable plane sealing device capable of autonomously opening and closing an air path according to claim 1, characterized in that: A heat insulation pad (6) is fixedly mounted on the upper end of the sealing plate (1).

4. A reliable plane sealing device capable of autonomously opening and closing an air path according to claim 1, characterized in that: The sealing plate (1) is provided with mounting countersunk holes (7) on all four sides.

5. A reliable plane sealing device capable of autonomously opening and closing an air path according to claim 1, characterized in that: The number of disc springs in the large-diameter disc spring assembly (21) is eight to ten, the diameter is 120 mm to 180 mm, and the fatigue life is not less than 300,000 times.

6. A reliable plane sealing device capable of autonomously opening and closing an air path according to claim 1, characterized in that: The ventilation holes (20) are provided in three layers in total, each layer is distributed in an annular shape at equal intervals, and the number of ventilation holes in each layer is four to six.

7. A reliable plane sealing device capable of autonomously opening and closing an air path according to claim 1, characterized in that: The exhaust holes (14) are provided at four locations, each having a diameter of 3 mm.

8. A reliable plane sealing device capable of autonomously opening and closing an air path according to claim 1, characterized in that: The diameter of the slag discharge holes (24) is 16 mm to 30 mm, and the number thereof is two to sixteen.

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