Sealing device for high-pressure equipment

Abstract

The utility model relates to a sealing device for high-pressure equipment. The sealing device comprises a reverse flange, a flat cover, a supporting ring and a metal sealing ring assembly. The flat cover is detachably connected to the top of the reverse flange and provided with a boss protruding towards a center hole of the reverse flange. The metal sealing ring assembly is arranged between the inner edge of the top of the reverse flange and the boss of the flat cover and comprises a metal ring. One part of the supporting ring is detachably connected to the bottom of the boss of the flat cover through a first fastener, and the other part of the supporting ring is located at the bottom of the metal ring so as to support the metal ring. According to the sealing device for the high-pressure equipment, the reverse flange and the metal sealing ring assembly are matched for use, the boundary dimension of the equipment is remarkably reduced, the optional range of materials is widened, and therefore the manufacturing cost is reduced.

Description

Technical Field

[0001] This disclosure generally relates to the field of petrochemical equipment technology, and more specifically, to a sealing device for high-pressure equipment. Background Technology

[0002] In the petrochemical industry, high-pressure equipment (such as reactors, pressure vessels, and heat exchangers) is crucial for various processes. Because these devices typically operate under harsh conditions including high temperature, high pressure, and corrosion, extremely high demands are placed on their sealing structures. While existing sealing structures (such as metal ring gaskets and welded lip seals) meet these requirements to some extent, they still present the following problems: Regarding metal ring gaskets, when used in conjunction with the cylinder end, the bolts are large, and the cylinder end itself is also large, leading to higher costs. Regarding welded lip seals, the machining precision requirements are high, and sealing welding is necessary, resulting in inconvenient assembly and disassembly, difficult maintenance, and increased costs.

[0003] Therefore, how to provide a new type of high-pressure equipment sealing device that is smaller in size, lower in cost, and easier to maintain is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the present disclosure provides a sealing device for high-pressure equipment that significantly reduces the overall size of the equipment by using a reverse flange in conjunction with a metal sealing ring assembly, thereby expanding the range of material options and reducing manufacturing costs. Moreover, the reverse flange and flat cover of the sealing device are detachably connected, making it easy to remove the metal sealing ring assembly from between the reverse flange and flat cover for easy maintenance.

[0005] To achieve the above objectives, this disclosure provides a sealing device for high-pressure equipment, comprising a reverse flange, a flat cover, a retainer ring, and a metal sealing ring assembly; the flat cover is detachably connected to the top of the reverse flange and has a boss protruding toward the center hole of the reverse flange; the metal sealing ring assembly is disposed between the inner edge of the top of the reverse flange and the boss of the flat cover, and includes a metal ring; and a portion of the retainer ring is detachably connected to the bottom of the boss of the flat cover by a first fastener, and another portion of the retainer ring is located at the bottom of the metal ring to support the metal ring.

[0006] Optionally, the reverse flange and the flat cover are detachably connected by a second fastener.

[0007] Optionally, the second fastener includes a main stud and a main nut, and the flat cover and the reverse flange each have threaded holes for threaded connection with the main stud.

[0008] Optionally, the first fastener is a bolt.

[0009] Optionally, the flat cover has a metal ring receiving groove around the boss for receiving the upper part of the metal ring; and the inner edge of the top of the reverse flange is configured as a conical surface that matches the lower part of the metal ring.

[0010] Optionally, the upper conical surface of the metal ring that contacts the inner wall of the metal ring receiving groove of the flat cover is provided with a plurality of circumferential grooves.

[0011] Optionally, each of the plurality of circumferential grooves has a width of 1 to 1.5 mm and a depth of 1 mm.

[0012] Optionally, the metal sealing ring assembly further includes a graphite gasket located between the upper conical surface of the metal ring and the inner wall of the metal ring receiving groove.

[0013] Optionally, the thickness of the graphite pad is 1 mm.

[0014] Optionally, the sealing device for high-pressure equipment further includes an auxiliary bolt, and the flat cover has an auxiliary threaded hole for threaded connection with the auxiliary bolt.

[0015] Compared with the prior art, the sealing device for high-pressure equipment provided in this disclosure has at least the following advantages:

[0016] (1) Compared with the ordinary flanges with outwardly extending flange rings used in the prior art, the sealing device for high-pressure equipment disclosed herein adopts a reverse flange with inwardly extending flange ring. By using the reverse flange in conjunction with the metal sealing ring assembly, the sealing device can use a flat cover that is relatively smaller in size (e.g., smaller diameter, thinner thickness) than the existing flat cover. This significantly reduces the overall size of the equipment, allowing many low-cost materials that previously did not meet the size requirements (e.g., insufficient diameter, insufficient thickness) to be used as the small-sized flat cover of this disclosure. This expands the range of material options and reduces manufacturing costs. Moreover, the reverse flange and flat cover of this sealing device are detachably connected, making it easy to remove the metal sealing ring assembly from between the reverse flange and the flat cover, thus facilitating maintenance. Therefore, this sealing device, through improvements and optimizations to the structure of existing sealing devices, solves the problems of large size, high cost, and difficult maintenance existing in the prior art.

[0017] (2) The sealing device of this disclosure has multiple circumferential grooves on the upper conical surface of the metal ring, and a graphite gasket is provided between the upper conical surface of the metal ring and the inner wall of the metal ring receiving groove. In this way, the main stud and the main nut apply a clamping force, causing the graphite gasket to undergo plastic deformation and sink and fit into the multiple circumferential grooves, which further enhances the sealing reliability and sealing performance. Moreover, compared with the metal gaskets conventionally used in the prior art, the graphite gasket used in the sealing device of this disclosure is not easy to stick to the metal ring and the flat cover even when the equipment is running for a long time, which facilitates the disassembly and maintenance of the metal sealing ring assembly and reduces equipment downtime and maintenance costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of this disclosure, the embodiments of this disclosure will be further explained and described with reference to the following drawings. These drawings are only used to more conveniently and specifically describe the embodiments of this disclosure and are not intended to limit this disclosure. In the drawings:

[0019] Figure 1 This is a structural schematic diagram of a sealing device for high-pressure equipment according to one embodiment of the present disclosure.

[0020] In the diagram: 1. Reverse flange; 2. Support ring; 3. Metal ring; 4. Graphite gasket; 5. Flat cap; 6. Main stud; 7. Main nut; 8. Bolt; 9. Auxiliary bolt. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, specific embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. These embodiments are provided by way of example only. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. Based on the described embodiments of this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are also within the scope of protection claimed by this disclosure.

[0022] In the description of this disclosure, it should be noted that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0023] In the description of this disclosure, unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," etc., should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0024] One embodiment of this disclosure provides a sealing device for high-voltage equipment. (See also...) Figure 1 The sealing device for high-pressure equipment includes a reverse flange 1, a flat cover 5, a retainer ring 2, and a metal sealing ring assembly. The flat cover 5 is detachably connected to the top of the reverse flange 1 and has a boss protruding towards the center hole of the reverse flange 1. The metal sealing ring assembly is disposed between the inner edge of the top of the reverse flange 1 and the boss of the flat cover 5, and includes a metal ring 3. In use, the flat cover 5 engages with the metal ring 3. Under the pressure of the medium, the flat cover 5 is lifted upwards, causing the metal ring 3 to spring back outwards, thereby ensuring a sealing effect. A portion of the retainer ring 2 is detachably connected to the bottom of the boss of the flat cover 5 by a first fastener for easy installation and removal, while another portion of the retainer ring 2 is located at the bottom of the metal ring 3 to support it.

[0025] In a preferred embodiment of this disclosure, the reverse flange 1 and the flat cover 5 are detachably connected by a second fastener. Preferably, the second fastener includes a main stud 6 and a main nut 7. The flat cover 5 and the reverse flange 1 each have threaded holes for threaded connection with the main stud 6. Thus, when connecting the flat cover 5 and the reverse flange 1, the main stud 6 is sequentially threaded into the threaded holes of the flat cover 5 and the reverse flange 1, and the main nut 7 is tightened onto the main stud 6 at the top of the flat cover 5, thereby achieving the connection between the flat cover 5 and the reverse flange 1. The specifications and number of the main studs 6 can be optimized and adjusted according to the operating pressure and temperature of the equipment. The clamping force applied by the main studs 6 and the main nut 7 ensures a tight fit between the metal ring 3 and the inner wall of the metal ring receiving groove of the flat cover 5 and the conical surface of the inner edge of the reverse flange 1.

[0026] In a preferred embodiment of this disclosure, the first fastener is a bolt 8, such as... Figure 1 As shown, there can be multiple bolts 8, and the multiple bolts 8 can be arranged at even intervals.

[0027] In a preferred embodiment of this disclosure, the flat cover 5 has a metal ring receiving groove around the boss for receiving the upper part of the metal ring 3, and the inner edge of the top of the reverse flange 1 is configured as a conical surface that matches the lower part of the metal ring 3; thus, the metal ring receiving groove of the flat cover 5 and the conical surface of the reverse flange 1 together form a space for installing the metal ring 3.

[0028] In a preferred embodiment of this disclosure, the metal ring 3 and the reverse flange 1 are made of materials that are resistant to high temperature, corrosion, and high pressure, including but not limited to stainless steel, high-strength carbon steel, or composite materials thereof.

[0029] In a preferred embodiment of this disclosure, the upper conical surface of the metal ring 3, which contacts the inner wall of the metal ring receiving groove of the flat cover 5, is provided with a plurality of (e.g., 2 to 3) circumferential grooves. Figure 1 As shown, the circumferential grooves are preferably semi-circular. Preferably, each of the plurality of circumferential grooves has a width of 1 to 1.5 mm and a depth of 1 mm. The metal sealing ring assembly also includes a graphite gasket (i.e., an annular gasket made of graphite) 4, which is located between the upper conical surface of the metal ring 3 and the inner wall of the metal ring receiving groove. Preferably, the thickness of the graphite gasket 4 is 1 mm. In this way, the main stud 6 and the main nut 7 apply a clamping force, causing the graphite gasket 4 to undergo plastic deformation and recess and fit into the plurality of circumferential grooves, further enhancing the sealing reliability and sealing performance; moreover, the graphite gasket 4 used in the sealing device of this disclosure is not prone to sticking to the metal ring 3 and the flat cover 5 even when the equipment is running for a long time, thereby facilitating the disassembly and maintenance of the metal sealing ring assembly and reducing equipment downtime and maintenance costs.

[0030] In a preferred embodiment of this disclosure, the sealing device for high-pressure equipment further includes an auxiliary bolt 9, and the flat cover 5 has an auxiliary threaded hole for threaded connection with the auxiliary bolt 9.

[0031] In one embodiment of this disclosure, the sealing device for high-pressure equipment achieves initial sealing upon assembly via a metal ring 3 and a graphite gasket 4 that undergoes plastic deformation. Subsequently, during operation of the high-pressure equipment, the medium pressure acts on the flat cover 5, lifting it upwards. Simultaneously, the metal ring 3 rebounds outwards under the medium pressure, further tightening against the flat cover 5 and the reverse flange 1, thereby further enhancing the sealing effect and improving equipment safety performance. The sealing device for high-pressure equipment according to one embodiment of this disclosure features a compact structure, excellent sealing performance, convenient maintenance, high cost-effectiveness, and strong adaptability. Specifically, this sealing device, through the cooperation of the metal ring 3 and the reverse flange 1, reduces the outer diameter of the equipment end (reducing the outer diameter of the equipment end is equivalent to a diameter reduction treatment of the existing sealing device), and reduces the diameter and thickness of the flat cover 5. This allows the sealing device to use a flat cover 5 that is relatively smaller in size (e.g., smaller diameter, thinner thickness) than the existing flat cover. This allows many low-priced materials that did not meet the original size requirements (e.g., insufficient diameter, insufficient thickness) to be used as the small-sized flat cover 5 of this disclosure, thus expanding the range of material options and reducing manufacturing costs. The circumferential groove design on the metal ring 3, combined with the plastic deformation of the graphite gasket 4, ensures high pressure, The sealing reliability is excellent under harsh conditions such as high temperature and corrosion. The metal sealing ring assembly has a detachable structure, and its graphite gasket 4 is not prone to sticking to the metal ring 3 and flat cover 5 even after long-term use of the equipment, thus facilitating quick disassembly and maintenance, reducing equipment downtime and maintenance costs. This sealing device expands the range of materials available and reduces material and manufacturing costs through improvements and optimizations to the structure of existing sealing devices. Due to its excellent sealing performance, this sealing device is suitable for high-pressure equipment in the petroleum, chemical, and power industries. It can adapt to various complex working environments and can operate stably for a long time under harsh conditions such as high pressure, high temperature, and corrosion, effectively improving the safety and service life of the equipment.

[0032] It should be understood that the accompanying drawings in the embodiments of this disclosure only relate to structures relevant to the embodiments of this disclosure, while other structures can be referenced to conventional designs. The devices and / or structures in the various embodiments provided in this disclosure can be combined, modified, and / or changed to form new technical solutions. Without inventive effort, these technical solutions should also be included within the scope of protection claimed in this disclosure.

[0033] It should be understood that the specific examples provided in the embodiments described herein are for the purpose of illustrating the embodiments of this disclosure in detail and are not intended to limit the scope of this disclosure. The embodiments in this disclosure can be practiced without these specific examples. In some embodiments, structures and / or techniques well known to those skilled in the art have not been shown in detail so as not to obscure the understanding of this disclosure.

[0034] While preferred embodiments of the present disclosure have been shown and described herein, it will be readily understood by those skilled in the art that these embodiments are provided by way of example only. Various variations, modifications, and substitutions will occur to those skilled in the art without departing from the present disclosure. It should be understood that various alternatives to the embodiments of the present disclosure described herein are optionally used to implement the present disclosure. The scope of the present disclosure is intended to be defined by the appended claims, and thereby covers apparatuses, structures, and their equivalents within the scope of those claims.

Claims

1. A sealing device for high-pressure equipment, characterized in that, Includes a reverse flange (1), a flat cover (5), a support ring (2), and a metal sealing ring assembly; The flat cover (5) is detachably connected to the top of the reverse flange (1) and has a boss protruding toward the center hole of the reverse flange (1); The metal sealing ring assembly is disposed between the inner edge of the top of the reverse flange (1) and the boss of the flat cover (5), and includes a metal ring (3); and A portion of the support ring (2) is detachably connected to the bottom of the boss of the flat cover (5) by a first fastener, and another portion of the support ring (2) is located at the bottom of the metal ring (3) to support the metal ring (3).

2. The sealing device for high-pressure equipment according to claim 1, characterized in that, The reverse flange (1) and the flat cover (5) are detachably connected by a second fastener.

3. The sealing device for high-pressure equipment according to claim 2, characterized in that, The second fastener includes a main stud (6) and a main nut (7), and the flat cover (5) and the reverse flange (1) are each provided with a threaded hole for threaded connection with the main stud (6).

4. The sealing device for high-pressure equipment according to claim 1, characterized in that, The first fastener is a bolt (8).

5. The sealing device for high-pressure equipment according to claim 1, characterized in that, The flat cover (5) has a metal ring receiving groove around the protrusion for accommodating the upper part of the metal ring (3); and The inner edge of the top of the reverse flange (1) is configured as a conical surface that matches the lower part of the metal ring (3).

6. The sealing device for high-pressure equipment according to claim 5, characterized in that, The upper conical surface of the metal ring (3) that contacts the inner wall of the metal ring receiving groove of the flat cover (5) has multiple circumferential grooves.

7. The sealing device for high-pressure equipment according to claim 6, characterized in that, Each of the plurality of circumferential grooves has a width of 1 to 1.5 mm and a depth of 1 mm.

8. The sealing device for high-pressure equipment according to claim 6, characterized in that, The metal sealing ring assembly also includes a graphite gasket (4) located between the upper conical surface of the metal ring (3) and the inner wall of the metal ring receiving groove.

9. The sealing device for high-pressure equipment according to claim 8, characterized in that, The thickness of the graphite pad (4) is 1 mm.

10. The sealing device for high-pressure equipment according to claim 1, characterized in that, It also includes an auxiliary bolt (9), and the flat cover (5) has an auxiliary threaded hole for threaded connection with the auxiliary bolt (9).

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