Compensating seal for a slag cooler

Abstract

The utility model provides a kind of compensable sealing device of cold slag machine, including dynamic sealing ring, static sealing ring and dust baffle, wherein: the dynamic sealing ring is fixedly connected with the end plate of cold slag machine cylinder by several connecting pieces one, static sealing ring is provided in the dynamic sealing ring, and the outer end surface of static sealing ring is fixedly connected with dust baffle by several connecting pieces three;The utility model adopts dynamic and static separation sealing structure: sealing pad, dynamic sealing ring flange and other components are connected by bolt nut, rotate with cold slag machine cylinder;Static sealing ring, dust baffle and feed pipe are fixedly stationary.High-temperature packing realizes dynamic, static combination surface sealing, and packing wear gap is compensated by adjusting pressure plate compression force;Adjusting disc spring pre-tightening force controls dynamic sealing ring dynamic displacement, ensures that rotating axis and static sealing ring are coaxial, effectively solve the problem of dust leakage.

Description

Technical Field

[0001] This utility model relates to the field of boiler ash and slag treatment, and in particular to a compensable sealing device for a cold slag machine. Background Technology

[0002] After combustion, circulating fluidized bed boilers produce ash and slag at around 1000℃, which typically needs to be cooled by a drum-type ash cooler before reuse. A key component between the ash inlet and the drum of the ash cooler is the ash inlet sealing device. This device needs to have two functions: first, excellent sealing to prevent ash and slag leakage; and second, good coaxiality between the centerline of the sealing device and the centerline of the drum.

[0003] Current slag coolers commonly suffer from ash leakage in the slag inlet device. The main reason is that the mainstream sealing device is a mechanical labyrinth structure, located between the slag inlet pipe and the cylinder. The dynamic sealing ring is fixed to the cylinder end plate, and the static sealing ring is fixed to the slag inlet pipe. Both are rigidly connected. When the slag cooler is working, the static ring is stationary, while the dynamic ring rotates continuously with the cylinder. The rotation center line of the cylinder will swing slightly. In order to prevent interference between the static sealing ring and the dynamic sealing ring, a gap of not less than 8-10mm must be reserved between them. Due to the large gap, this structure still inevitably suffers from ash leakage in actual operation and cannot achieve the expected effect.

[0004] Therefore, it is essential to invent a compensable sealing device for a cold slag machine. Utility Model Content

[0005] To solve the above-mentioned technical problems, the present invention provides a compensable cold slag machine sealing device with the following technical solution: a compensable cold slag machine sealing device, including a dynamic sealing ring, a static sealing ring and a dust baffle plate, wherein: the dynamic sealing ring is fixedly connected to the end plate of the cold slag machine cylinder by a plurality of connecting parts; a static sealing ring is provided inside the dynamic sealing ring; and the outer end face of the static sealing ring is fixedly connected to the dust baffle plate by a plurality of connecting parts.

[0006] A high-temperature resistant packing is provided between the dynamic sealing ring and the static sealing ring;

[0007] A pressure plate is provided on the outer side of the high-temperature resistant packing.

[0008] The pressure plate and the dynamic sealing ring are fixedly connected by several connecting parts;

[0009] The pressure plate and the dynamic sealing ring are fixedly installed on the outside of the feed pipe by means of a dust baffle plate;

[0010] A sealing gasket is provided between the dynamic sealing ring and the end plate;

[0011] A second sealing gasket is provided between the static sealing ring and the dust baffle plate.

[0012] The dynamic sealing ring includes a dynamic sealing ring body, an outer flange ring one, an outer flange ring two, and an inner annular rim. The outer flange ring one and the outer flange ring two are coaxially fixedly installed on the outer sides of both ends of the dynamic sealing ring body. An integral inner annular rim is provided inside the dynamic sealing ring body on the side near the outer flange ring two. The dynamic sealing ring body is fixedly connected to the end plate through the outer flange ring two and the connecting piece one. The inner annular rim, the dynamic sealing ring body, and the static sealing ring form an annular cavity for installing high-temperature packing. One end of the pressure plate is inserted into the annular cavity to press the high-temperature packing. The dynamic sealing ring body is fixedly connected to the pressure plate through the outer flange ring one and the connecting piece two.

[0013] The pressure plate includes a flange and a pressure ring. An integral flange is coaxially provided on the outer side of one end of the pressure ring. One end of the pressure ring is inserted into the ring cavity. The flange is fixedly connected to the outer flange ring by a connecting piece two.

[0014] The static sealing ring includes a static sealing ring body and an inner flange ring. The inner flange ring is coaxially fixedly installed inside the static sealing ring body. The second sealing gasket is fixedly installed between the inner flange ring and the dust baffle plate. The inner flange ring is fixedly connected to the dust baffle plate with a connecting piece three.

[0015] The surface of the dust baffle plate is provided with a ring hole that matches the feed pipe.

[0016] Bolt holes are provided on the dust baffle, sealing gasket one, and sealing gasket two.

[0017] The first connector includes a butterfly spring, a flat washer, a hexagonal nut bolt, and a nut. One end of the hexagonal nut bolt passes through the end plate, the first sealing gasket, and the second outer flange ring in sequence, and protrudes from one side of the second outer flange ring. The end of the hexagonal nut bolt protruding from one side of the second outer flange ring is equipped with a nut, a butterfly spring, and a flat washer in sequence from the outside to the inside.

[0018] Compared with the prior art, the advantages of this utility model are:

[0019] This invention connects the sealing gasket, dynamic sealing ring flange, high-temperature packing, and pressure plate together with bolts and nuts, allowing them to rotate together with the slag cooler cylinder. The static sealing ring and baffle plate are connected to the feed pipe, remaining stationary and fixed to the slag pipe. The sealing effect of the high-temperature packing achieves a seal between the dynamic and static surfaces. The gap between the packing and the cylindrical surfaces of the dynamic and static sealing rings is compensated by periodically adjusting the pressure of the pressure plate. By adjusting the preload of the disc spring, the dynamic displacement between the dynamic sealing ring and the cylinder end plate is maintained, ensuring the cylinder's rotation centerline is coaxial with the static sealing ring's centerline, effectively solving the problem of ash leakage from the slag feeding device. Attached Figure Description

[0020] Figure 1 This is a partially enlarged structural diagram of part I of this utility model.

[0021] Figure 2 This is a schematic diagram of the front connection structure of the pressure plate, dynamic sealing ring, dust baffle, and end plate of this utility model.

[0022] Figure 3 This is a schematic diagram of the reverse connection structure of the pressure plate, dynamic sealing ring, dust baffle, and end plate of this utility model.

[0023] Figure 4 This is a partial cross-sectional structural diagram of the present invention.

[0024] Figure 5 This is a schematic diagram of the pressure plate structure of this utility model.

[0025] Figure 6 This is a schematic diagram of the dynamic sealing ring structure of this utility model.

[0026] Figure 7 This is a schematic diagram of the static sealing ring structure of this utility model.

[0027] Figure 8 This is a schematic diagram of the connector structure of this utility model.

[0028] Figure 9 This is a partially enlarged structural diagram of section II of this utility model.

[0029] Figure 10 This is a schematic diagram of the overall structure of the present invention and the installation structure of the slag cooler cylinder.

[0030] In the picture:

[0031] 1. Pressure plate, 11. Flange, 12. Pressure ring, 2. Dynamic sealing ring, 21. Dynamic sealing ring body, 22. Outer flange ring 1, 23. Outer flange ring 2, 24. Inner ring edge, 3. High-temperature packing, 4. Sealing gasket 1, 5. Static sealing ring, 51. Static sealing ring body, 52. Inner flange ring, 6. Sealing gasket 2, 7. Dust baffle, 71. Ring hole, 8. Butterfly spring, 9. Flat washer, 10. End plate, 13. Connecting piece 2, 14. Connecting piece 3, 15. Ring cavity, 16. Cold slag machine cylinder, 17. Feed pipe, 18. Hexagonal cap bolt, 19. Nut. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0033] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., 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 the present invention and for 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 the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0034] The present invention will be further described below with reference to the accompanying drawings: Example

[0035] Reference Figure 1-10 A compensable sealing device for a cold slag machine includes a dynamic sealing ring 2, a static sealing ring 5, and a baffle plate 7. The dynamic sealing ring 2 is fixedly connected to the end plate 10 of the cold slag machine cylinder 16 by several connectors. The dynamic sealing ring 2 is the basic structure of the entire device, used to support and fix other related components. The dynamic sealing ring 2 is made of heat-resistant stainless steel and has sufficient strength and stability to withstand the vibration and pressure generated during the operation of the device. The static sealing ring 5 is provided inside the dynamic sealing ring 2. The outer end face of the static sealing ring 5 is fixedly connected to the baffle plate 7 by several connectors 14 (such as bolts).

[0036] Specifically, a high-temperature resistant packing 3 is provided between the dynamic sealing ring 2 and the static sealing ring 5;

[0037] Specifically, a pressure plate 1 is provided on the outside of the high-temperature resistant packing 3, which can install the high-temperature resistant packing 3 into the cavity and press it tightly by the pressure plate 1 through the connecting part 13 (such as bolts). After the slag cooler has been running for a period of time, friction will cause a small gap to form between the high-temperature resistant packing 3 and the dynamic and static sealing rings. At this time, the bolts need to be tightened and the pressure plate 1 is used to press the packing 3 tightly to eliminate the gap and prevent ash leakage. This is the so-called compensation of the sealing packing.

[0038] Specifically, the pressure plate 1 and the dynamic sealing ring 2 are fixedly connected by several connecting parts 13;

[0039] Specifically, the pressure plate 1 and the dynamic sealing ring 2 are fixedly installed on the outside of the feed pipe 17 by means of the dust baffle plate 7;

[0040] Specifically, a sealing gasket 4 is provided between the dynamic sealing ring 2 and the end plate 10, which serves two purposes: firstly, to seal, and secondly, to buffer the friction between the two parts.

[0041] Specifically, a sealing gasket 6 is provided between the static sealing ring 5 and the dust baffle plate 7.

[0042] Specifically, the dynamic sealing ring 2 includes a dynamic sealing ring body 21, an outer flange ring 1 22, an outer flange ring 23, and an inner annular edge 24. The outer flange ring 1 22 and the outer flange ring 23 are coaxially fixedly installed on the outer sides of both ends of the dynamic sealing ring body 21. An integral inner annular edge 24 is provided inside the dynamic sealing ring body 21 on the side near the outer flange ring 23. The dynamic sealing ring body 21 is fixedly connected to the end plate 10 through the outer flange ring 23 and the connecting piece 1. The inner annular edge 24, the dynamic sealing ring body 21, and the static sealing ring 5 form an annular cavity 15 for installing the high-temperature packing 3. One end of the pressure plate 1 is inserted into the annular cavity 15 to press the high-temperature packing 3. The dynamic sealing ring 21 is fixedly connected to the pressure plate 1 through the outer flange ring 1 22 and the connecting piece 2 13.

[0043] The size of the hole on the flange face of outer flange ring 23 and the clearance between the bolts used should meet the runout of the axis when the slag cooler cylinder 16 rotates.

[0044] Specifically, the pressure plate 1 includes a flange 11 and a pressure ring 12. An integral flange 11 is coaxially provided on the outer side of one end of the pressure ring 12. One end of the pressure ring 12 is inserted into the ring cavity 15. The flange 11 is fixedly connected to the outer flange ring 22 with the connecting piece 2 13.

[0045] Specifically, the static sealing ring 5 includes a static sealing ring body 51 and an inner flange ring 52. The inner flange ring 52 is coaxially fixedly installed inside the static sealing ring body 51. The sealing gasket 2 6 is fixedly installed between the inner flange ring 52 and the dust baffle plate 7. The inner flange ring 52 is fixedly connected to the dust baffle plate 7 with the connecting piece 3 14.

[0046] Specifically, the surface of the dust baffle 7 is provided with an annular hole 71 that matches the feed pipe 17, and the dust baffle 7 is welded to the outer surface of the feed pipe 17 through the annular hole 71.

[0047] Specifically, bolt holes are provided on the dust baffle 7, sealing gasket 1 4, and sealing gasket 2 6.

[0048] Specifically, the connecting component includes a butterfly spring 8, a flat washer 9, a hexagonal cap bolt 18, and a nut 19. One end of the hexagonal cap bolt 18 passes through the end plate 10, the sealing gasket 4, and the outer flange ring 23 in sequence, and protrudes from one side of the outer flange ring 23. The end of the hexagonal cap bolt 18 protruding from one side of the outer flange ring 23 is fitted with a nut 19, a butterfly spring 8, and a flat washer 9 in sequence from the outside to the inside. The butterfly spring 8 and the flat washer 9 can cover the bolt hole, giving the butterfly spring 8 a certain preload, so that the dynamic sealing ring 2 can smoothly move around the axis of rotation when the cylinder rotates, thereby maintaining the coaxiality with the static sealing ring 5.

[0049] Through the above specific embodiments, the compensating slag inlet sealing device of this utility model can effectively prevent ash and slag leakage. Simultaneously, the planar displacement of the dynamic sealing ring on the cylinder end plate ensures the coaxiality of the sealing device and reduces wear on the high-temperature packing. Furthermore, the device has a compact structure, stable operation, and can significantly reduce maintenance costs for enterprises, thus possessing high practical value.

[0050] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A compensable sealing device for a cold slag machine, characterized in that: It includes a dynamic sealing ring (2), a static sealing ring (5) and a dust baffle plate (7), wherein: the dynamic sealing ring (2) is fixedly connected to the end plate (10) of the slag cooler cylinder (16) by a number of connectors; a static sealing ring (5) is provided inside the dynamic sealing ring (2); and the outer end face of the static sealing ring (5) is fixedly connected to the dust baffle plate (7) by a number of connectors (14). A high-temperature resistant packing (3) is provided between the dynamic sealing ring (2) and the static sealing ring (5). A pressure plate (1) is provided on the outside of the high-temperature packing (3); The pressure plate (1) and the dynamic sealing ring (2) are fixedly connected by several connecting parts (13); The pressure plate (1) and the dynamic sealing ring (2) are fixedly installed on the outside of the feed pipe (17) by means of a dust baffle plate (7); A sealing gasket (4) is provided between the dynamic sealing ring (2) and the end plate (10); A sealing gasket 2 (6) is provided between the static sealing ring (5) and the dust baffle plate (7).

2. The compensable cold slag machine sealing device as described in claim 1, characterized in that: The dynamic sealing ring (2) includes a dynamic sealing ring body (21), an outer flange ring one (22), an outer flange ring two (23), and an inner ring edge (24). The outer flange ring one (22) and the outer flange ring two (23) are coaxially fixedly installed on the outer sides of both ends of the dynamic sealing ring body (21). An integral inner ring edge (24) is provided inside the dynamic sealing ring body (21) on the side close to the outer flange ring two (23). The dynamic sealing ring body (21) is fixedly connected to the end plate (10) through the outer flange ring two (23) and the connecting piece one. The inner ring edge (24) forms an annular cavity (15) for installing the high-temperature packing (3) between the dynamic sealing ring body (21) and the static sealing ring (5). One end of the pressure plate (1) is inserted into the annular cavity (15) to press the high-temperature packing (3). The dynamic sealing ring body (21) is fixedly connected to the pressure plate (1) through the outer flange ring one (22) and the connecting piece two (13).

3. The compensable cold slag machine sealing device as described in claim 2, characterized in that: The pressure plate (1) includes a flange (11) and a pressure ring (12). An integral flange (11) is coaxially provided on the outer side of one end of the pressure ring (12). One end of the pressure ring (12) is inserted into the ring cavity (15). The flange (11) is fixedly connected to the outer flange ring (22) with the connecting piece two (13).

4. The compensable cold slag machine sealing device as described in claim 1, characterized in that: The static sealing ring (5) includes a static sealing ring body (51) and an inner flange ring (52). The inner flange ring (52) is coaxially fixedly installed inside the static sealing ring body (51). The second sealing gasket (6) is fixedly installed between the inner flange ring (52) and the dust baffle plate (7). The inner flange ring (52) is fixedly connected to the dust baffle plate (7) with the third connecting piece (14).

5. The compensable cold slag machine sealing device as described in claim 4, characterized in that: The surface of the dust baffle (7) is provided with an annular hole (71) that matches the feed pipe (17).

6. The compensable cold slag machine sealing device as described in claim 1, characterized in that: Bolt holes are provided on the dust baffle (7), sealing gasket one (4) and sealing gasket two (6).

7. A compensable cold slag machine sealing device as described in claim 2, characterized in that: The first connector includes a butterfly spring (8), a flat washer (9), a hexagonal cap bolt (18), and a nut (19). One end of the hexagonal cap bolt (18) passes through the end plate (10), the first sealing gasket (4), and the second outer flange ring (23) in sequence, and protrudes from one side of the second outer flange ring (23). The end of the hexagonal cap bolt (18) protruding from one side of the second outer flange ring (23) is equipped with a nut (19), a butterfly spring (8), and a flat washer (9) in sequence from the outside to the inside.

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