A new expansion joint for cyclone dust collector

Abstract

The present invention discloses a novel expansion joint for a cyclone dust collector, comprising: an end pipe I, a protective cover, a retaining ring, a bellows, an end pipe II, a dustproof ring plate and a dustproof ring; the two ends of the bellows are respectively fixed by welding through the end pipe I and the end pipe II; the protective cover is arranged on the outside of the bellows, the front end of the protective cover is welded and fixed to the end pipe I, and the tail end is welded to the dustproof ring plate; the bottom of the dustproof ring plate is fitted with the surface of the end pipe II; wherein a groove is arranged at the bottom of the dustproof ring plate, and the dustproof ring is located in the groove; the retaining ring is arranged in the protective cover; wherein one end of the retaining ring is welded to the inner surface of the front end of the protective cover, and the other end is welded to the end pipe I. The present invention improves the anti-vibration and anti-scouring capabilities of the product, and at the same time can greatly reduce the influence of dust in the medium on the product, can improve the comprehensive service life of the product, and ensure the safe operation of the system.

Description

Technical Field

[0001] The invention belongs to the technical field of expansion joints, and in particular relates to a novel expansion joint for a cyclone dust collector. Background Art

[0002] The energy recovery system of the catalytic cracking unit is a key device of the entire smoke exhaust system. Whether the energy recovery system unit can operate for a long period of time, in addition to its own design and manufacturing quality, is mainly determined by the quality of the flue gas entering the smoke exhaust. The flue gas coming out of the regenerator contains a certain amount of catalyst, which will cause wear on the blades of the smoke exhaust. When the smoke exhaust blades lose weight to a certain extent due to wear, the energy recovery system will lose its effectiveness. In order to ensure the quality of the flue gas entering the smoke exhaust, a cyclone dust collector must be used to remove and purify the flue gas coming out of the regenerator before it enters the smoke exhaust.

[0003] An expansion joint is generally installed on the central air pipe inside the cyclone dust collector to compensate for the thermal displacement between the high-temperature internal parts and the shell, installation deviation, impact vibration of gas flow, deformation of the internal partition, etc. The medium flows inside and outside the expansion joint, and the working temperature reaches 700-800℃. In addition, the dust content in the medium flowing inside is very high, and the average dust diameter is about 15 microns. In the previous structure, an outer protective cover was generally added, and the gap at the open end was reduced to avoid the flue gas from scouring the bellows. However, due to the high-speed flow of flue gas, it is easy to vibrate and even resonate when it contacts the external protective cover. In addition, the corrosion of the flue gas medium causes the weld of the outer protective cover to crack or even be worn away. Some wear out the connecting bolts of the outer protective cover, causing the outer protective cover to fall off. During the falling process, it collides with the bellows, causing the bellows to be damaged, affecting the normal operation of the system. Summary of the invention

[0004] The technology of the present invention solves the problem: overcomes the shortcomings of the prior art, provides a new expansion joint for cyclone dust collector, improves the product's anti-vibration and scouring capabilities, and can greatly reduce the impact of dust in the medium on the product, thereby increasing the comprehensive service life of the product and ensuring the safe operation of the system.

[0005] In order to solve the above technical problems, the present invention discloses a novel expansion joint for a cyclone dust collector, comprising: an end pipe I, a protective cover, a retaining ring, a bellows, an end pipe II, a dustproof ring plate and a dustproof ring;

[0006] The two ends of the bellows are respectively fixed by welding through end pipe Ⅰ and end pipe Ⅱ;

[0007] The protective cover is arranged outside the bellows, the front end of the protective cover is welded and fixed to the end pipe I, and the rear end is welded to the dustproof ring plate;

[0008] The bottom of the dustproof ring plate is in contact with the surface of the end pipe II; wherein a groove is provided at the bottom of the dustproof ring plate, and the dustproof ring is located in the groove;

[0009] The retaining ring is arranged in the protective cover; wherein one end of the retaining ring is welded to the inner surface of the front end of the protective cover, and the other end is welded to the end pipe I.

[0010] In the above-mentioned novel expansion joint for cyclone dust collector, the protective cover comprises: an end joint section, a transition section and an equal straight section;

[0011] The end joint section smoothly transitions to the straight section through the transition section;

[0012] The end joint section is parallel to the equal straight section;

[0013] The end joint section is fitted with the bottom surface of the end pipe I and fixed by welding;

[0014] The straight sections are parallel to the bellows and meet the set spacing requirements.

[0015] In the above-mentioned new expansion joint for cyclone dust collector,

[0016] Set the interval ≥30mm.

[0017] In the above-mentioned new expansion joint for cyclone dust collector,

[0018] The angle α formed by the extension line of the transition section and the straight section is 30°;

[0019] The length of the terminal section is 100 mm.

[0020] In the above-mentioned new expansion joint for cyclone dust collector,

[0021] The length of the retaining ring is 50mm;

[0022] The spacing distance between the end face of the retaining ring and the end face of the end pipe I is 125 mm.

[0023] The novel expansion joint for cyclone dust collector further comprises: a guide tube;

[0024] The guide tube is arranged below the bellows and parallel to the bellows;

[0025] One end of the guide tube is welded and fixed to the end pipe II.

[0026] The above-mentioned novel expansion joint for cyclone dust collector also includes: inner village;

[0027] The inner village is arranged on the inner surface of the guide tube.

[0028] The novel expansion joint for cyclone dust collector further comprises: a wear-resistant lining;

[0029] The wear-resistant lining is arranged on the inner surface of the end pipe I and the end pipe II.

[0030] In the above-mentioned novel expansion joint for cyclone dust collector, a plurality of U-shaped grooves are arranged on the welding surface of the end joint section and the end pipe I to increase the welding area during welding.

[0031] In the above-mentioned novel expansion joint for cyclone dust collector, the novel expansion joint for cyclone dust collector is installed in a three-stage cyclone dust collector;

[0032] The three-stage cyclone dust collector includes: a flue gas outlet I, a flue gas outlet II, a flue gas inlet, a gas supply port, a shell, a partition, a gas collecting cylinder, a hanging cylinder and a separation single pipe;

[0033] Smoke outlet I and smoke outlet II are arranged on the top of the shell;

[0034] The air supply port and the smoke inlet are respectively arranged on the left and right sides of the shell;

[0035] The gas collecting cylinder and the hanging cylinder are nested and installed in the shell, and the partition is arranged at the bottom end of the shell. The partition, the gas collecting cylinder and the hanging cylinder divide the inner cavity of the shell into a clean room, a gas distribution room and a gas collecting room.

[0036] Multiple separate single tubes are evenly distributed on the gas collecting cylinder;

[0037] The expansion joint of the new cyclone dust collector is installed on the air collecting cylinder and located above the separation single pipe.

[0038] The present invention has the following advantages:

[0039] (1) The present invention discloses a novel expansion joint for a cyclone dust collector, which adopts an integral stamping forming protective cover, the outer part of the protective cover has no welding or bolt connection, and the entire protective cover has no right-angle edges at the diameter change position, and all have smooth transitions. During the forming process of the protective cover, the end joint section reserves a straight edge to ensure that the protective cover is directly welded to the end pipe, and the welding operation is convenient.

[0040] (2) The present invention discloses a novel expansion joint for a cyclone dust collector, wherein a retaining ring is provided at the junction of the end joint section and the transition section of the protective cover, and the retaining ring serves to limit the protective cover and improve the protective cover's ability to resist impact and vibration. Even if the protective cover is damaged and falls off due to abnormal circumstances, the retaining ring can still serve as a protective limiter to prevent the protective cover from falling off and causing impact on the bellows.

[0041] (3) The present invention discloses a novel expansion joint for a cyclone dust collector, wherein a plurality of U-shaped grooves are arranged on the welding surface of the end joint section and the end pipe I, thereby increasing the welding area during welding, thereby improving the strength of the weld and enhancing the weld's ability to resist vibration and medium erosion.

[0042] (4) The present invention discloses a novel expansion joint for a cyclone dust collector. A dustproof ring plate and a dustproof ring are added to the tail end of the protective cover, which can not only limit and stabilize the protective cover, but also prevent dust in the medium from entering the bellows cavity, causing dust accumulation in the bellows and causing failure or even damage, thereby increasing the service life of the product and ensuring the safe operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a structural schematic diagram of a novel expansion joint for a cyclone dust collector according to an embodiment of the present invention;

[0044] Figure 2 yes Figure 1 A local enlarged schematic diagram of the middle A;

[0045] Figure 3 yes Figure 2 The corresponding dimensioning diagram;

[0046] Figure 4 is a schematic diagram of a weld bead of a welding surface in an embodiment of the present invention;

[0047] Figure 5 It is a schematic diagram of the installation of a novel expansion joint for a cyclone dust collector and a three-stage cyclone dust collector in an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments disclosed in the present invention will be further described in detail below with reference to the accompanying drawings.

[0049] like Figure 1 In this embodiment, the new expansion joint for cyclone dust collector includes: end pipe Ⅰ1, protective cover 2, retaining ring 3, bellows 4, end pipe Ⅱ5, dustproof ring plate 6 and dustproof ring 7. Specific connection relationship: the two ends of the bellows 4 are respectively welded and fixed by the end pipe Ⅰ1 and the end pipe Ⅱ5; the protective cover 2 is arranged on the outside of the bellows 4, the front end of the protective cover 2 is welded and fixed to the end pipe Ⅰ1, and the tail end is welded to the dustproof ring plate 6; the bottom of the dustproof ring plate 6 is in contact with the surface of the end pipe Ⅱ5; wherein, the bottom of the dustproof ring plate 6 is provided with a groove, and the dustproof ring 7 is located in the groove; the retaining ring 3 is arranged in the protective cover 2; wherein, one end of the retaining ring 3 is welded to the inner surface of the front end of the protective cover 2, and the other end is welded to the end pipe Ⅰ1.

[0050] In a preferred embodiment of the present invention, Figure 2 The protective cover 2 may specifically include: an end joint section 21, a transition section 22 and an equal straight section 23. The end joint section 21 smoothly transitions to the equal straight section 23 through the transition section 22; the end joint section 21 is parallel to the equal straight section 23; the end joint section 21 is attached to the bottom surface of the end tube Ⅰ1 and fixed by welding; the equal straight section 23 is parallel to the corrugated tube 4 and meets the set spacing requirements.

[0051] Preferably, Figure 3 , set the interval ≥ 30mm; the angle α formed by the extension line of the transition section 22 and the straight section 23 is 30°; the length of the end joint section 21 is 100mm.

[0052] Preferably, Figure 3 The length of the retaining ring 3 is 50 mm; the spacing distance between the end face of the retaining ring 3 and the end face of the end pipe Ⅰ1 is 125 mm.

[0053] In a preferred embodiment of the present invention, the novel expansion joint for cyclone dust collector may further include: a guide tube 8. The guide tube 8 is arranged below the bellows 4 and parallel to the bellows 4; one end of the guide tube 8 is welded and fixed to the end pipe II5.

[0054] In a preferred embodiment of the present invention, the novel expansion joint for cyclone dust collector may further include: an inner village 9. The inner village 9 is arranged on the inner surface of the guide cylinder 8.

[0055] In a preferred embodiment of the present invention, the novel expansion joint for cyclone dust collector may further include: a wear-resistant lining 10. The wear-resistant lining 10 is arranged on the inner surface of the end pipe Ⅰ1 and the end pipe Ⅱ5.

[0056] In a preferred embodiment of the present invention, Figure 4 A plurality of U-shaped grooves 211 are provided on the welding surface of the end joint section 21 and the end pipe Ⅰ1 to increase the welding area during welding.

[0057] In a preferred embodiment of the present invention, Figure 5 The new expansion joint for cyclone dust collector is installed in the three-stage cyclone dust collector. The three-stage cyclone dust collector includes: a flue gas outlet Ⅰ11, a flue gas outlet Ⅱ12, a flue gas inlet 13, an air supply port 14, a shell 15, a partition 16, a gas collecting cylinder 17, a hanging cylinder 18 and a separation single pipe 19.

[0058] Preferably, the smoke outlet I11 and the smoke outlet II12 are arranged at the top of the outer shell 15; the air supply port 14 and the smoke inlet 13 are respectively arranged on the left and right sides of the outer shell 15; the gas collecting cylinder 17 and the hanging cylinder 18 are nested and installed in the outer shell 15, and the partition 16 is arranged at the bottom end of the inner part of the outer shell 15. The partition 16, the gas collecting cylinder 17 and the hanging cylinder 18 divide the inner cavity of the outer shell 15 into a clean room, a gas distribution chamber and a gas collecting chamber; a plurality of separation single tubes 19 are evenly distributed on the gas collecting cylinder 17; the expansion joint for the new cyclone dust collector is installed on the gas collecting cylinder 17 and is located above the separation single tube 19.

[0059] It should be noted that, in this embodiment, the protective cover can be formed by rolling and welding a steel plate and then stamping it on a hydraulic press using a dedicated mold: the end joint section has a reserved straight section, and the inner diameter of the straight section matches the outer diameter of the end pipe to ensure that it can be normally assembled into the end pipe. The bellows can be formed into a finished product by rolling and welding a stainless steel plate and then hydraulically forming it on a bellows mold. The bellows can be an internal plug-in structure or an external plug-in structure, and the appearance and size of the protective cover can also be appropriately adjusted.

[0060] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

[0061] The contents not described in detail in the specification of the present invention belong to the common knowledge of the professionals in this field.

Claims

1. A new expansion joint for cyclone dust collector, characterized in that: include: End pipe I (1), protective cover (2), retaining ring (3), bellows (4), end pipe II (5), dustproof ring plate (6), dustproof ring (7), guide tube (8), inner village (9), wear-resistant lining (10); The two ends of the corrugated pipe (4) are respectively fixed by welding through an end pipe I (1) and an end pipe II (5); The protective cover (2) is arranged outside the corrugated pipe (4), the front end of the protective cover (2) is welded and fixed to the end pipe I (1), and the rear end is welded to the dustproof ring plate (6); The bottom of the dustproof ring plate (6) is in contact with the surface of the end pipe II (5); wherein a groove is provided at the bottom of the dustproof ring plate (6), and the dustproof ring (7) is located in the groove; The retaining ring (3) is arranged in the protective cover (2); wherein one end of the retaining ring (3) is welded to the inner surface of the front end of the protective cover (2), and the other end is welded to the end pipe I (1); The guide tube (8) is arranged below the bellows (4) and is arranged parallel to the bellows (4); one end of the guide tube (8) is welded and fixed to the end tube II (5); the inner village (9) is arranged on the inner surface of the guide tube (8); and the wear-resistant lining (10) is arranged on the inner surfaces of the end tube I (1) and the end tube II (5); The protective cover (2) is formed by rolling and welding a steel plate and then stamping it on a hydraulic press using a dedicated mold, and comprises: an end joint section (21), a transition section (22) and an equal straight section (23); wherein the end joint section (21) smoothly transitions to the equal straight section (23) through the transition section (22); the end joint section (21) is parallel to the equal straight section (23); the end joint section (21) is fitted to the bottom surface of the end pipe I (1) and fixed by welding; the equal straight section (23) is parallel to the corrugated pipe (4) and meets the set spacing requirements; a plurality of U-shaped grooves (211) are arranged on the welding surface of the end joint section (21) and the end pipe I (1) to increase the welding area during welding; the inner diameter of the reserved straight section of the end joint section (21) matches the outer diameter of the end pipe to ensure that it can be normally assembled into the end pipe; The novel cyclone dust collector expansion joint is installed in the three-stage cyclone dust collector; A three-stage cyclone dust collector comprises: a smoke outlet I (11), a smoke outlet II (12), a smoke inlet (13), a gas supply port (14), a housing (15), a partition (16), a gas collecting cylinder (17), a hanging cylinder (18) and a separation single pipe (19); The smoke outlet I (11) and the smoke outlet II (12) are arranged on the top of the housing (15); The air supply port (14) and the smoke inlet (13) are respectively arranged on the left and right sides of the outer shell (15); The gas collecting cylinder (17) and the hanging cylinder (18) are nested and installed in the shell (15), and the partition (16) is arranged at the bottom end of the shell (15). The partition (16), the gas collecting cylinder (17) and the hanging cylinder (18) divide the inner cavity of the shell (15) into a clean room, a gas distribution room and a gas collecting room. A plurality of separate single tubes (19) are evenly distributed on the gas collecting cylinder (17); The novel expansion joint for the cyclone dust collector is installed on the air collecting cylinder (17) and is located above the separation single pipe (19).

2. The novel expansion joint for cyclone dust collector according to claim 1 is characterized in that: Set the interval ≥30mm.

3. The novel expansion joint for cyclone dust collector according to claim 1 is characterized in that: The angle α formed by the extension line of the transition section (22) and the straight section (23) is 30°; The length of the terminal section (21) is 100 mm.

4. The novel expansion joint for cyclone dust collector according to claim 1 is characterized in that: The length of the retaining ring (3) is 50 mm; The spacing distance between the end face of the retaining ring (3) and the end face of the end pipe I (1) is 125 mm.

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