A high life rotary union for desulfurizer delivery

Abstract

The application discloses a high-life rotary joint for desulfurizer conveying, which comprises a gas-powder joint bushing, a rotary joint shell, an upper bearing, a lower bearing and a liquid storage type sealing flange plate; the rotary joint shell is sleeved outside the gas-powder joint bushing, the upper end of the rotary joint shell is rotatably connected with the gas-powder joint bushing through the upper bearing, and the lower end of the rotary joint shell is rotatably connected with the gas-powder joint bushing through the lower bearing; the liquid storage type sealing flange plate is fixedly connected with the outer wall of the rotary joint shell; the upper end surface of the liquid storage type sealing flange plate is rotatably and sealingly connected with the lower end of the gas-powder joint bushing through a sealing assembly; and the middle part of the liquid storage type sealing flange plate is provided with a gas-powder outlet channel which is communicated with a material flow channel. Through the upper bearing and the lower bearing, in cooperation with the liquid storage type sealing flange plate and the sealing assembly, the high sealing of the rotary joint is realized, and the rotary joint is especially suitable for conveying high-pressure gas-powder mixed medium, is convenient to install, durable, and easy to maintain.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of desulfurization devices in the metallurgical industry, and in particular to a long-service-life rotary joint for desulfurizer conveying. BACKGROUND

[0002] In order to improve the efficiency of hot metal desulfurization and the utilization rate of desulfurizer, at present, major steel plants have all set up projects to reform the desulfurization devices by the injection method. The commonly used method at present is to rotate the injection gun, which can improve the kinetic performance of the hot metal, uniformly refine the desulfurizing powder, increase the reaction area of the desulfurizer and the hot metal, thereby improving the utilization rate of the desulfurizer; on the other hand, by rotating the injection gun, the vertical upward floating track of the desulfurizer is changed into a spiral floating track, the reaction time of the desulfurizer and the hot metal is prolonged, and the efficiency of the hot metal desulfurization and the utilization rate of the desulfurizer are further improved. In order to rotate the injection gun and at the same time make the desulfurizer be injected into the hot metal through the bottom of the injection gun, a rotary joint needs to be installed at the rotating device. However, due to the particularity of the desulfurizing powder and the poor working conditions of the hot metal desulfurization site, the rotary joints on the market generally adopt a double-layer rotary composite cylinder. Due to poor sealing performance, sometimes even the newly installed rotary joint appears powder leakage or bearing seizure within one week.

[0003] Therefore, the prior art still needs to be improved. SUMMARY

[0004] To solve the above technical problems, the embodiments of the present application propose a long-service-life rotary joint for desulfurizer conveying, which solves the technical problem of short service life of the existing rotary joint.

[0005] To solve the above technical problems, some embodiments of the present application disclose a long-service-life rotary joint for desulfurizer conveying, which comprises a gas-powder joint bushing, a rotary joint shell, an upper bearing, a lower bearing and a liquid storage type sealing flange,

[0006] The gas-powder joint bushing is internally hollow to form a material flow passage;

[0007] The rotary joint shell is sleeved outside the gas-powder joint bushing, the upper end of the rotary joint shell is rotatably connected with the gas-powder joint bushing through the upper bearing, and the lower end of the rotary joint shell is rotatably connected with the gas-powder joint bushing through the lower bearing;

[0008] The liquid storage type sealing flange is fixedly connected with the outer wall of the rotary joint shell; and the upper end surface of the liquid storage type sealing flange is rotatably and sealingly connected with the lower end of the gas-powder joint bushing through a sealing assembly;

[0009] The liquid-storing sealing flange has a gas powder outlet channel in the middle that is connected to the material flow channel.

[0010] Furthermore, the upper end of the gas powder connector bushing is provided with internal threads for connecting the gas powder input hose.

[0011] Furthermore, the outer wall of the gas powder connector bushing is provided with an upper bearing locking nut and a first spacer sleeve from top to bottom. The first spacer sleeve is located between the upper bearing locking nut and the upper bearing. In addition, a bearing mounting flange is provided on the outside of the first spacer sleeve, and the lower end face of the bearing mounting flange is sealed to the upper end face of the rotary joint housing.

[0012] Furthermore, the outer wall of the upper end of the gas powder connector bushing is provided with an external thread for connecting with the upper bearing locking nut.

[0013] Furthermore, the bearing mounting flange has a circumferentially arranged first sealing groove inside, and a dustproof sealing ring is placed in the first sealing groove, which is tightly against the outer wall of the first spacer sleeve.

[0014] Furthermore, the inner wall of the upper part of the rotary joint housing has a first step, and the lower end face of the upper bearing is partially located on the first step.

[0015] Furthermore, a second spacer sleeve is fitted on the outer wall of the gas powder connector bushing. The second spacer sleeve is located between the upper bearing and the lower bearing. The gap between the inner wall of the rotary joint housing and the outer wall of the second spacer sleeve forms a sealed oil cavity that connects the upper bearing and the lower bearing.

[0016] Furthermore, the rotary joint housing is provided with an oil injection nozzle that communicates with the sealed oil chamber.

[0017] Furthermore, the sealing assembly includes:

[0018] A second sealing groove is provided on the lower end face of the gas powder connector bushing;

[0019] A horizontal extension extending outward from the lower end of the gas powder connector bushing;

[0020] An annular sealing partition extending downward from the end of the horizontal extension;

[0021] An annular liquid storage tank is provided on the upper end face of the liquid storage sealing flange.

[0022] And a third sealing groove is provided on the side of the annular liquid storage tank away from the gas powder connector bushing;

[0023] The annular sealing partition is located inside the annular liquid storage tank, and a third sealing ring is provided inside the third sealing groove, which is in close contact with the annular sealing partition.

[0024] A second sealing ring is provided in the second sealing groove. The lower end of the second sealing ring is in close contact with the upper surface of the liquid storage sealing flange and is located inside the annular liquid storage groove.

[0025] Furthermore, the lower end of the rotary joint housing is provided with bolt holes for connecting to the liquid-storage sealing flange.

[0026] By adopting the above technical solution, the present invention has at least the following beneficial effects:

[0027] This invention provides a high-life rotary joint for desulfurizing agent transportation. Through upper and lower bearings, combined with a liquid-storage sealing flange and sealing components, the rotary joint achieves a high degree of sealing. It is particularly suitable for transporting high-pressure gas-powder mixed media, and is easy to install, durable, and easy to maintain. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of a high-life rotary joint for desulfurizing agent delivery disclosed in some embodiments of the present invention;

[0030] Figure 2 for Figure 1 AA section view;

[0031] Figure 3 This is a schematic diagram of a high-life rotary joint for desulfurizing agent delivery disclosed in some embodiments of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Gas powder connector bushing; 2. Rotary joint housing; 3. Upper bearing; 4. Lower bearing; 5. Liquid storage sealing flange; 6. Upper bearing lock nut; 7. First spacer sleeve; 8. Bearing mounting flange; 9. Dustproof sealing ring; 10. First step; 11. Second spacer sleeve; 12. Sealing oil chamber; 13. Oil nozzle; 14. Second sealing ring; 15. Annular sealing partition; 16. Annular liquid storage tank; 17. Third sealing ring; 18. Gas powder inlet; 19. Gas powder outlet; 20. Sealing groove on the bottom surface of the sealing flange; 21. Material flow channel. Detailed Implementation

[0034] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure. This disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0035] These embodiments are provided to make the disclosure thorough and complete, and to fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0036] It should be noted that, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are 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, and therefore should not be construed as a limitation of this disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] Furthermore, the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0038] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to 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 depending on the specific circumstances. When a particular device is described as being located between a first device and a second device, an intermediary device may or may not be present between the particular device and the first or second device.

[0039] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0040] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0041] like Figures 1 to 3 As shown, some embodiments of the present invention disclose a high-life rotary joint for desulfurizing agent transportation, including a gas-powder joint bushing 1, a rotary joint housing 2, an upper bearing 3, a lower bearing 4, and a liquid-storage sealing flange 5. The gas-powder joint bushing 1 serves as a material flow channel 21 for the passage of materials such as gas-powder mixtures; that is, the gas-powder joint bushing 1 is hollow to form a material flow channel 21, with the upper end connected to an input flow pipe and the lower end outputting fluid through the liquid-storage sealing flange 5. The rotary joint housing 2 is fitted outside the gas-powder joint bushing 1; generally, the upper part of the gas-powder joint bushing 1 protrudes from the upper end of the rotary joint housing 2. The upper end of the rotary joint housing 2 is rotatably connected to the gas powder connector bushing 1 via an upper bearing 3, and the lower end of the rotary joint housing 2 is rotatably connected to the gas powder connector bushing 1 via a lower bearing 4; the rotary connection between the rotary joint housing 2 and the gas powder connector bushing 1 is achieved through the upper and lower bearings 4, and the liquid storage sealing flange 5 is fixedly connected to the outer wall of the rotary joint housing 2; furthermore, the upper end face of the liquid storage sealing flange 5 is rotatably sealed to the lower end of the gas powder connector bushing 1 via a sealing assembly; the liquid storage sealing flange 5 has a gas powder outlet 19 channel in the middle that communicates with the material flow channel 21.

[0042] This embodiment achieves a rotary connection between the rotary joint housing 2 and the gas powder connector bushing 1 through the upper bearing 3 and the lower bearing 4. A liquid-storage sealing flange 5 ensures a sealed connection between the gas powder connector bushing 1 and the liquid-storage sealing flange 5, thus preventing gas powder from entering the rotation space and damaging the rotary joint. This specifically solves the problems of desulfurizer sealing and bearing life, demonstrating significant application feasibility and market potential. In some embodiments, to connect the gas powder connector bushing 1 to the fluid input pipeline, the upper end of the gas powder connector bushing 1 is provided with internal threads for connecting to the gas powder input hose. These internal threads facilitate the connection of the high-pressure gas powder mixing hose. In use, the upper end of the split connector bushing becomes the gas powder inlet 18, and the lower end becomes the gas powder outlet 19, enabling the delivery and discharge of gas powder.

[0043] The high-life rotary joint disclosed in some embodiments of the present invention, based on the above embodiments, has an upper bearing locking nut 6 and a first spacer sleeve 7 arranged sequentially from top to bottom on the outer wall of the gas powder connector bushing 1. The first spacer sleeve 7 is located between the upper bearing locking nut 6 and the upper bearing 3. Furthermore, a bearing mounting flange 8 is provided on the outer side of the first spacer sleeve 7, and the lower end face of the bearing mounting flange 8 is sealed to the upper end face of the rotary joint housing 2. The connection between the upper ends of the rotary joint housing 2 is achieved through the first spacer sleeve 7 and the bearing locking nut. In some embodiments, the outer wall of the upper end of the gas powder connector bushing 1 is provided with external threads for connection with the upper bearing locking nut 6. Through the external thread connection, the upper bearing locking nut 6 can contact the first spacer sleeve 7 as much as possible to form an effective seal. Further, to further ensure sealing, a circumferentially arranged first sealing groove is provided inside the bearing mounting flange 8, and a dustproof sealing ring 9 is placed in the first sealing groove, tightly abutting against the outer wall of the first spacer sleeve 7. With the cooperation of the first sealing ring, it is virtually impossible for the gas-powder mixture to enter the rotation gap from the upper end of the rotary joint housing 2, effectively avoiding jamming and stuck.

[0044] The high-life rotary joint disclosed in some embodiments of the present invention, based on the above embodiments, has a first step 10 on the inner wall of the upper part of the rotary joint housing 2, and the lower end face of the upper bearing 3 is partially located on the first step 10. The first step 10 allows the upper bearing 3 to be better installed. At the same time, it is partially suspended in the gap to provide lubricating oil to the bearing. Specifically, in some embodiments, a second spacer sleeve 11 is also fitted on the outer wall of the gas powder connector bushing 1. The second spacer sleeve 11 is located between the upper bearing 3 and the lower bearing 4. The gap between the inner wall of the rotary joint housing 2 and the outer wall of the second spacer sleeve 11 forms a sealed oil cavity 12 connecting the upper bearing 3 and the lower bearing 4. The rotary joint housing 2 is provided with an oil injection nozzle 13 that connects to the sealed oil cavity 12. In use, lubricating oil is injected through the oil injection nozzle 13. The upper end of the lubricating oil is the upper bearing 3, and the lower end is the lower bearing 4, which can simultaneously lubricate the upper bearing 3 and the lower bearing 4, reduce wear and friction during the rotation of the upper bearing 3 and the lower bearing 4, and further improve the service life.

[0045] The high-life rotary joint disclosed in some embodiments of the present invention, based on the above embodiments, includes the following sealing assembly: a second sealing groove disposed on the lower end face of the gas powder connector bushing 1; a horizontal extension extending outward from the lower end of the gas powder connector bushing 1; an annular sealing partition 15 extending downward from the end of the horizontal extension; an annular liquid storage groove 16 disposed on the upper end face of the liquid storage sealing flange 5; and a third sealing groove disposed on the groove wall of the annular liquid storage groove 16 on the side away from the gas powder connector bushing 1; wherein, the annular sealing partition 15 is located within the annular liquid storage groove 16, and a third sealing ring 17 is disposed within the third sealing groove, which abuts against the annular sealing partition 15; a second sealing ring 14 is disposed within the second sealing groove, the lower end of the second sealing ring 14 abutting against the upper surface of the liquid storage sealing flange 5 and located inside the annular liquid storage groove 16. The sealing liquid in the annular liquid storage tank 16 is sealed by the second sealing ring 14 and the third sealing ring 17 respectively. This effectively prevents the gas-powder mixture from entering the bearing, thus solving the problem of powder entering the bearing and causing low lifespan or even damage to the rotary joint. The lower end of the rotary joint housing 2 may be provided with bolt holes for connecting to the liquid-storage sealing flange 5, so that the liquid-storage sealing flange 5 and the rotary joint housing 2 can be stably connected by bolts.

[0046] The high-life rotary joint disclosed in some embodiments of the present invention is suitable for conveying high-pressure, high-flow-rate gas-powder mixtures. Applications have proven that this rotary joint is particularly suitable for conveying high-pressure gas-powder mixtures, and is easy to install, durable, and easy to maintain.It mainly consists of several parts, including a gas-powder joint bushing 1, a rotary joint housing 2, a liquid storage sealing flange 5, a bearing flange end cover (bearing mounting flange 8), a first spacer sleeve 7, a second stepped spacer sleeve 11, a lower bearing 4, an upper bearing 3, a bearing lock nut, a nut washer, connecting bolts, a dustproof sealing ring 9, a second sealing ring 14, a third sealing ring 17, and explosion-proof lubricating fluid. It can be divided into a fixed end and a rotating end, which rotate relative to each other via upper and lower bearings. The upper end of the fixed end is the fixed inlet of the gas-powder mixture (gas-powder inlet 18), and the lower end of the rotating end is the rotating outlet of the gas-powder mixture (gas-powder outlet 19). The fixed end inlet and the rotating end outlet are connected by equal-diameter... The internal flow channel (inner hole) of the gas-powder mixture is connected, meaning that the gas-powder connector bushing 1 has an inner wall of equal diameter, which can effectively prevent powder accumulation and blockage of the gas-powder mixture inside the rotary joint. The fixed end consists of several parts from top to bottom, including the gas-powder connector bushing 1, bearing locking nut, nut washer, spacer sleeve one, stepped spacer sleeve two, and O-ring (third sealing ring 17) in the sealing groove at the bottom of the mounting connector bushing. The rotating end consists of several parts from top to bottom, including the bearing flange end cover and dustproof sealing ring 9 installed in the sealing groove of the bearing flange end cover, bearing flange connecting bolts, rotary joint housing 2, liquid storage sealing flange 5, and rotary joint mounting bolts. The outer wall of the gas-powder connector bushing 1 is an integral stepped annular hollow structure. The structure includes an internal thread on the inner side of the upper end of the bushing (air powder connector bushing 1) for connection with the air powder hose; an external thread and a locking gasket groove on the outer side of the upper end of the bushing; an O-ring groove (second sealing groove) and a liquid storage sealing partition (annular sealing partition 15) on the lower end of the bushing; the liquid storage sealing flange 5 is also a hollow structure, with an inner hole serving as an air powder flow channel; a liquid storage groove (annular liquid storage groove 16) is provided on the upper end of the liquid storage sealing flange for storing sealing oil; a sealing ring groove (third sealing groove) is provided on the inner wall of the outer side of the liquid storage groove, and an O-ring (third sealing ring 17) is placed in the third sealing groove to prevent the sealing oil from flowing out and entering the bearing cavity; a sealing groove (sealing flange) is provided on the lower end of the sealing flange. Bottom sealing groove 20), with O-rings placed inside to prevent leakage of gas-powder mixture; bolt through holes of the same number as the connecting bolts are evenly distributed along the circumference of the outer circumference of the flange. The rotary joint mounting bolts pass through the threaded holes on the rotary joint housing 2 and the bolt through holes on the liquid storage sealing flange 5 in sequence to install the rotary joint on the rotating hollow shaft of the desulfurization equipment; the liquid storage tank (sealing oil chamber 12) of the rotating part is filled with lubricating fluid, and the liquid storage sealing baffle at the lower end of the bushing of the fixed end part is inserted into the liquid storage groove, and the sealing rings on both sides of the groove prevent the lubricating oil from leaking; the liquid in the liquid storage groove and the front and rear seals effectively prevent the gas-powder mixture from entering the bearing, thereby effectively solving the problem of powder entering the bearing and causing the rotary joint to have a short service life or even be damaged.

[0047] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0048] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner.

Claims

1. A long-life rotary joint for desulfurizing agent transportation, characterized in that, This includes the gas powder connector bushing, rotary joint housing, upper bearing, lower bearing, and liquid-retaining sealing flange. The hollow interior of the gas powder connector bushing forms a material flow channel; The rotary joint housing is fitted outside the gas powder connector bushing. The upper end of the rotary joint housing is rotatably connected to the gas powder connector bushing via an upper bearing, and the lower end of the rotary joint housing is rotatably connected to the gas powder connector bushing via a lower bearing. The liquid-storing sealing flange is fixedly connected to the outer wall of the rotary joint housing; and the upper end face of the liquid-storing sealing flange is rotatably and sealingly connected to the lower end of the gas powder connector bushing through a sealing assembly. The liquid-storing sealing flange has a gas powder outlet channel in the middle that is connected to the material flow channel; The outer wall of the gas powder connector bushing is provided with an upper bearing locking nut and a first spacer sleeve from top to bottom. The first spacer sleeve is located between the upper bearing locking nut and the upper bearing. A bearing mounting flange is also provided on the outside of the first spacer sleeve. The lower end face of the bearing mounting flange is sealed to the upper end face of the rotary joint housing. The upper outer wall of the gas powder connector bushing is provided with an external thread for connecting with the upper bearing locking nut. The bearing mounting flange is provided with a circumferentially arranged first sealing groove. A dustproof sealing ring is placed in the first sealing groove and abuts against the outer wall of the first spacer sleeve. The sealing assembly includes: A second sealing groove is provided on the lower end face of the gas powder connector bushing; A horizontal extension extending outward from the lower end of the gas powder connector bushing; An annular sealing partition extending downward from the end of the horizontal extension; An annular liquid storage tank is provided on the upper end face of the liquid storage sealing flange. And a third sealing groove is provided on the side of the annular liquid storage tank away from the gas powder connector bushing; The annular sealing partition is located inside the annular liquid storage tank, and a third sealing ring is provided inside the third sealing groove, which is in close contact with the annular sealing partition. A second sealing ring is provided in the second sealing groove. The lower end of the second sealing ring is in close contact with the upper surface of the liquid storage sealing flange and is located inside the annular liquid storage groove.

2. The high-life rotary joint according to claim 1, characterized in that, The upper end of the gas powder connector bushing is provided with internal threads for connecting the gas powder input hose.

3. The high-life rotary joint according to claim 1, characterized in that, The inner wall of the upper part of the rotary joint housing has a first step, and the lower end face of the upper bearing is partially located on the first step.

4. The high-life rotary joint according to claim 1, characterized in that, A second spacer sleeve is also fitted on the outer wall of the gas powder connector bushing. The second spacer sleeve is located between the upper bearing and the lower bearing. The gap between the inner wall of the rotary joint housing and the outer wall of the second spacer sleeve forms a sealed oil cavity that connects the upper bearing and the lower bearing.

5. The high-life rotary joint according to claim 4, characterized in that, The rotary joint housing is provided with an oil inlet that communicates with the sealed oil chamber.

6. The high-life rotary joint according to claim 1, characterized in that, The lower end of the rotary joint housing is provided with bolt holes for bolting to the liquid-storage sealing flange.

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