Dual channel rotary union for powder and gas

Abstract

The utility model relates to a kind of powder and gas double-channel rotary joint, it is characterized in that, including inner tube body, outer tube body, left shell body, intermediate shell body compression end cover and bearing assembly and sealing assembly;The inner tube body is the hollow structure of two ends opening, as desulfurizer channel, the outer tube body and the gas channel formed by the coaxial sleeve of inner tube body both, support bearing A is equipped at the connecting place of intermediate shell body, left shell body and inner tube body, air inlet pipe is equipped on the upper portion of intermediate shell body, the air inlet pipe is communicated with gas channel, support bearing B is installed at the connecting place of intermediate shell body, compression end cover and outer tube piece three, gas channel mouth and desulfurizer channel mouth are connected with external equipment by thread or flange.The utility model has the advantages that: this rotary joint, while inputting desulfurizer to stirring spray gun, can also cool spray gun, further improve the service life and performance of stirring spray gun.

Description

Technical Field

[0001] This utility model belongs to the technical field of rotary joint equipment, and particularly relates to a dual-channel rotary joint for powder and gas. Background Technology

[0002] Rotary joints are pipe connection devices that allow the connected pipes to rotate relative to each other. The application fields of rotary joints cover almost all processing and manufacturing industries, such as metallurgy, machine tools, power generation, petroleum, rubber, plastics, textiles, printing and dyeing, pharmaceuticals, cigarettes, papermaking, food, and feed processing.

[0003] In the desulfurization process of molten iron, a rotary stirring lance is often used to inject the desulfurizing agent into the molten iron to improve desulfurization efficiency and desulfurizing agent utilization. This method allows the desulfurizing agent to be more evenly dispersed in the molten iron, extending its reaction time with the molten iron. Simultaneously, since the stirring lance operates in a high-temperature molten iron environment, it requires cooling gas to ensure the lance's service life and performance.

[0004] Currently, the market lacks a rotary joint capable of simultaneously and efficiently delivering desulfurizing agent and gaseous coolant while meeting the complex operating requirements of rotary stirring nozzles. Existing rotary joints, in their structural design, struggle to simultaneously ensure the independent and stable delivery of desulfurizing agent and gaseous coolant, often resulting in problems such as channel blockage and leakage. Moreover, in the high-temperature, dusty, and mechanically vibrating environment of molten iron desulfurization, the sealing performance and durability of rotary joints face severe challenges. A failure in the rotary joint not only disrupts the normal operation of the desulfurization process, leading to decreased desulfurization efficiency and wasted desulfurizing agent, but may also damage the nozzle due to insufficient cooling, increasing production costs and maintenance workload for enterprises. Utility Model Content

[0005] The purpose of this invention is to provide a dual-channel rotary joint for injecting desulfurizing agent and cooling gas into a stirring nozzle, which aims to solve the problems of existing rotary joints that cannot simultaneously and stably deliver desulfurizing agent and cooling gas, have poor sealing performance, and are not durable enough.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] This utility model discloses a dual-channel rotary joint for powder and gas, characterized in that it comprises an inner tube, an outer tube, a left outer shell, a middle outer shell, and a pressing end cap; the inner tube is a hollow structure with openings at both ends, serving as a desulfurizing agent channel, with the left end of the inner tube being the desulfurizing agent inlet and the right end being the desulfurizing agent outlet; the outer tube and the inner tube are coaxially fitted together to form a gas channel, and the left outer shell is fitted onto the left end of the inner tube; a sealing ring is provided at the connection between the left end of the inner tube and the inner side of the left outer shell. The intermediate outer shell is fitted onto the outside of the inner and outer tubes. The left end of the intermediate outer shell is fixedly connected to the right end of the left outer shell by bolts. The other end is restricted by a clamping end cap to limit the axial movement of the intermediate outer shell. A support bearing A is provided at the connection between the intermediate outer shell, the left outer shell, and the inner tube. An air inlet pipe is provided on the intermediate outer shell, which is connected to a gas channel. The outlet end of the gas channel is connected to the annular cooling pipe of the stirring spray gun. A support bearing B is installed at the connection between the intermediate outer shell, the clamping end cap, and the outer tube. The gas channel port and the desulfurizing agent channel port are connected to external equipment by threads or flanges.

[0008] As a further description of the above technical solution: a connecting flange and a locking block are provided at the right end of the inner pipe body for connecting the inner pipe fittings and the drive mechanism of the desulfurization spray gun.

[0009] As a further description of the above technical solution: a groove is opened at the connection between the outer tube body and the intermediate outer shell body, and a third sealing ring is provided in the groove; a groove is opened at the connection between the outer tube body and the pressing end cap, and a fourth sealing ring is provided in the groove.

[0010] As a further description of the above technical solution: the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are O-rings, graphite sealing rings or polytetrafluoroethylene sealing rings.

[0011] Both the inner and outer tubes are made of high-strength, high-temperature resistant, and corrosion-resistant alloy materials.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1) This utility model has the advantages of simple structure, good sealing performance, and long service life.

[0014] It can simultaneously inject desulfurizing agent into molten iron and coolant gas into the stirring nozzle.

[0015] 2) High-efficiency dual-media delivery: Through independently designed inner and outer tube assemblies,

[0016] It can simultaneously and stably inject desulfurizing agent into molten iron and inject cooling gas into the stirring lance, meeting the different conveying requirements of the two media in the molten iron desulfurization process and improving the overall efficiency of the process.

[0017] 3) Superior sealing and durability: The multi-layer support and sealing structure, as well as the selection of high-temperature and wear-resistant materials, effectively solve the sealing problem, prevent the leakage of desulfurizing agent and cooling gas, and improve the durability of the rotary joint under harsh working conditions, extend the service life of the equipment, and reduce the number of maintenance and costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0019] To make the technical problem to be solved, the technical solution, and the beneficial technical effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and several exemplary embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the scope of protection of the present utility model.

[0020] It should be noted that in this article, the terms "first," "second," "third," "fourth," "left," and "right" are used for descriptive purposes only and should not be construed as indicating or implying relative importance, nor should they be construed as implicitly indicating the number of technical features indicated.

[0021] like Figure 1As shown, this utility model discloses a dual-channel rotary joint for powder and gas, characterized in that it includes an inner tube 1, an outer tube 2, a left outer shell 4, a middle outer shell 5, and a pressing end cap 8; the inner tube 1 is a hollow structure with openings at both ends, serving as a desulfurizing agent channel, with the left end of the inner tube 1 being the desulfurizing agent inlet and the right end being the desulfurizing agent outlet; the outer tube 2 and the inner tube 1 are coaxially fitted together to form a gas channel 3; the left outer shell 4 is fitted onto the left end of the inner tube 1, and a sealing ring 14 is provided at the connection between the left end of the inner tube 1 and the inner side of the left outer shell 4; the middle outer shell 5 is fitted onto the outer side of the inner tube 1 and the outer tube 2, and the middle outer shell 5... The left end of the middle outer shell 5 is fixedly connected to the right end of the left outer shell 4 by bolts. The other end is restricted by the pressure end cap 8 to limit the axial movement of the middle outer shell 5. A support bearing A15 is provided at the connection between the middle outer shell 5, the left outer shell 4 and the inner tube 1. An air inlet pipe 6 is provided on the middle outer shell 5. The air inlet pipe 6 is connected to the gas channel 3. The outlet connection end of the gas channel 3 is connected to the annular cooling pipe of the stirring spray gun. A support bearing B16 is installed at the connection between the middle outer shell 5, the pressure end cap 8 and the outer tube 2, so that the rotary joint can obtain a more stable transmission support after installation and fixation. The gas channel port and the desulfurizing agent channel port are connected to external equipment by threads or flanges.

[0022] As an example, this invention provides a connecting flange 10 and a locking block 11 at the right end of the inner tube 1 for connecting the inner tube 1 and the drive mechanism of the desulfurization spray gun. The drive mechanism can provide a stable torque output, ensuring that the stirring spray gun and the inner tube 1 rotate at a set speed.

[0023] Both the inner tube 1 and the outer tube 2 of this invention are made of high-strength, high-temperature resistant, and corrosion-resistant alloy materials. This effectively prevents leakage of desulfurizing agent and cooling gas, while improving the durability of the rotary joint under harsh working conditions, extending the service life of the equipment, and reducing maintenance frequency and costs.

[0024] The support bearings A15 and B16 of this utility model are made of high-temperature resistant ceramic bearings or graphite bearings, which not only provide stable support for the inner tube 1 during rotation, reducing vibration and friction, but also ensure that the inner tube 1 can rotate smoothly.

[0025] The present invention provides a groove A at the connection between the left shoulder of the inner tube 1 and the outer tube 2, and installs a first sealing ring 12 in the groove A. A groove B is provided at the connection between the inner tube 1 and the outer tube 2, and a second sealing ring is installed in the groove B to achieve sealing 13.

[0026] A groove C is provided at the connection between the outer tube 2 and the intermediate outer shell 5, and a third sealing ring 7 is provided in the groove C. A groove D is provided at the connection between the outer tube 2 and the pressing end cap 8, and a fourth sealing ring 9 is provided in the groove D.

[0027] The first sealing ring 12, the second sealing ring 13, the third sealing ring 7 and the fourth sealing ring 9 are O-rings, graphite sealing rings or polytetrafluoroethylene sealing rings.

[0028] Multiple layers of high-temperature and wear-resistant sealing materials are installed at key locations such as the connection between the inner and outer pipes, the feed connection, the discharge connection, the air inlet connection, and the air outlet connection, forming multiple sealing barriers to effectively prevent the leakage of desulfurizing agent and cooling gas, while also preventing external impurities from entering the rotary joint.

[0029] This invention also includes a control system, which controls parameters such as the flow rate and pressure of the desulfurizing agent, the flow rate, pressure and temperature of the cooling gas, and the rotation speed of the stirring spray gun. Based on set values, the system automatically adjusts the power of the desulfurizing agent delivery pump, the opening degree of the cooling gas supply valve, and the rotation speed of the rotary drive motor. The control system is existing technology and will not be described in detail here.

[0030] Connect the inner tube of this utility model to the external desulfurizing agent conveying pipeline, and check the installation of the sealing gasket to ensure that the connection is tight and leak-free; then connect the discharge connection end of the inner tube to the desulfurizing agent inlet of the mixing spray gun, adjust the position and then seal and fix it.

[0031] Next, connect the air inlet pipe 6 on the middle outer shell 5 to the external cooling gas supply source using a threaded connection or flange connection, and check the sealing condition. Then, surround the air outlet connection with the mixing spray gun to ensure that the cooling gas can be sprayed evenly onto the mixing spray gun.

[0032] Work process

[0033] Start the control system and set parameters such as the flow rate and pressure of the desulfurizing agent, the flow rate, pressure and temperature of the cooling gas, and the rotation speed of the stirring spray gun.

[0034] The external desulfurizing agent is pumped into the inner tube through the inlet end of the inner tube, and then into the mixing nozzle through the outlet connection end, finally being injected with molten iron.

[0035] An external cooling gas supply source delivers cooling gas through an inlet pipe to the gas channel 3 formed between the outer tube 2 and the inner tube 1. The cooling gas flows through the channel 3 and is sprayed into the annular cooling pipe of the mixing spray gun through the annular outlet at the outlet end, thereby cooling the spray gun and further improving its service life and performance.

Claims

1. A dual-channel rotary joint for powder and gas, characterized in that, The system includes an inner tube, an outer tube, a left outer shell, a middle outer shell, and a clamping end cap. The inner tube is a hollow structure with openings at both ends, serving as a desulfurizing agent channel. The left end of the inner tube is the desulfurizing agent inlet, and the right end is the desulfurizing agent outlet. The outer tube and the inner tube are coaxially fitted together to form a gas channel. The left outer shell is fitted onto the left end of the inner tube, and a sealing ring is provided at the connection between the left end of the inner tube and the inner side of the left outer shell. The middle outer shell is fitted onto the outer sides of the inner and outer tubes, and the left end of the middle outer shell is fixedly connected to the right end of the left outer shell by bolts. The other end is restricted by a clamping end cap to limit the axial movement of the middle outer shell. A support bearing A is provided at the connection between the middle outer shell, the left outer shell, and the inner tube. An air inlet pipe is provided on the middle outer shell, which communicates with the gas channel. The outlet of the gas channel is connected to the annular cooling pipe of the stirring spray gun. A support bearing B is installed at the connection between the middle outer shell, the clamping end cap, and the outer tube. The gas passage port and the desulfurizing agent passage port are connected to external equipment via threads or flanges; A connecting flange and a locking block are provided at the right end of the inner tube body for connecting the inner tube fittings and the drive mechanism of the desulfurization spray gun. Grooves are provided on the left shoulder of the inner tube and at the connection between the inner tube and the outer tube. A first sealing ring is installed in the groove on the left shoulder, and a second sealing ring is installed in the groove at the connection between the inner tube and the outer tube to achieve sealing. A groove is provided at the connection between the outer tube body and the intermediate outer shell body (1), and a third sealing ring is provided in the groove. A groove is provided at the connection between the outer tube body and the pressing end cap (2), and a fourth sealing ring is provided in the groove.

2. The dual-channel rotary joint for powder and gas according to claim 1, characterized in that, The first, second, third, and fourth sealing rings are O-rings, graphite sealing rings, or polytetrafluoroethylene sealing rings.

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