JPH0810721Y2 - Fluid supply rotary joint for converter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a fluid supply rotary joint for supplying a fluid having wear or corrosivity to a converter furnace body, for example.

[Prior Art] Conventionally, in order to supply a wearable or corrosive fluid to a converter furnace body from a fluid supply source provided on the fixed side, for example, a method disclosed in Japanese Patent Publication No. 57-53411. As in the rotary joint shown in FIG. 2, in order to avoid wear and stagnation, a fluid having wear or corrosion flows into the central fluid 8 whose flow direction does not suddenly change, and the fluid of the central fluid pipe 8 An annular fluid passage 13 penetrating the stator 21 and the rotor 22 is provided on the outer circumference, and the pressure or gas component of the cutoff gas flowing therein is constantly monitored by the monitor 23 to check the state of the central fluid pipe 8. I used the method of guessing. That is, when the fluctuation of the cutoff gas pressure or the change of the component is detected, it is judged that the central fluid pipe 8 is worn and the hole is opened, and the rotary joint body is promptly replaced.

[Problems to be solved by the invention] However, even in the example shown in FIG.
When a corrosive fluid such as an acid is circulated, other than wear of the flow path wall, for example, when the detection pressure or the detection gas component is affected by a change in the pressure or composition of the fluid flowing in the annular fluid passage 13 However, after replacing the rotary joint, there was no way to confirm it other than to conduct a detailed survey, which was also inconvenient. Further, it is necessary to replace the rotary joint main body every time the wear of the flow path wall is detected, which is a very disadvantageous structure in terms of main body manufacturing cost and replacement work.

As described above, the conventional rotary joint structure has not been practical in terms of circulating a fluid having wear or corrosion.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a fluid supply rotary joint for a converter, which is capable of surely visually confirming the wear state and which is inexpensive and easy to maintain.

[Means for Solving the Problems] The present invention is configured as follows to achieve the above object. That is, it is composed of a rotor A3 fixed to the end of the trunnion shaft 1 that supports and rotates the converter furnace body, and rotates together with the trunnion shaft 1, and a stator A2 that is connected to the fluid supply side and does not rotate.
One or more sets of fluid passages are bored in the rotor A3 and the stator A2, and each fluid passage communicates with a fluid passage provided in a sleeve 20 installed in the trunnion shaft or on the outer circumference of the trunnion shaft. By doing so, in the converter fluid supply rotary joint that simultaneously supplies two or more types of fluids containing an abrasive fluid or corrosive fluid to the converter furnace body, the central through space 4 is provided at the center of the rotary shaft of the rotary joint A18. ,
A central fluid pipe 8 is inserted into the space 4, fixed to the rotor A3 and communicated with a fluid passage 10 provided in the trunnion shaft 1, and a separate rotary joint B19 is provided at a fluid supply end of the central fluid pipe 8. The rotor B7 is fixed and communicated with the fixed end on the fluid supply side through the stator B6.

[Operation] In the present invention, a plurality of replaceable central fluid pipes are provided with an abradable fluid or a corrosive fluid in an annular fluid passage or rotor arranged on the outer periphery of the central fluid pipes and in a stator. By allowing other fluids to flow through the independent flow path of, it is possible to simultaneously supply two or more types of fluids with one fluid supply rotary joint, and to ensure a flow path through which an abradable fluid or a corrosive fluid flows. Allows management and easy replacement.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view showing the structure of a converter fluid supply rotary joint of the present invention. The converter fluid supply rotary joint of the present invention comprises a rotor A3 fixed to a rotating trunnion shaft 1 and a fluid. A rotary joint A18 consisting of a non-rotating stator A2 fixed to the supply side, and a rotor B7 fixed to the rotor A3 and rotating with the converter furnace body, and a stator B6 fixed to the fluid supply side and not rotating. It indicates that

Abrasable powder such as ore powder and carbon powder is supplied from the powder supply pipe 5, and is supplied to the converter furnace body through the central fluid pipe 8 connected by the rotary joint B19. The central fluid pipe 8 is inserted into a central through space 4 formed in a rotor A3 that rotates with the trunnion shaft 1, and both ends thereof are fixed to the rotor A3 in a detachable state by a pipe seal 9 and a pipe fixing bolt 11. ing. The central fluid pipe 8 is connected to the converter furnace side pipe 10 in a detachable manner in the trunnion shaft.

Air is supplied to the converter furnace body by an air supply pipe 12 provided on the stator A, an annular fluid passage 13 of the rotor A, and an air outlet side pipe 14 arranged in a through hole in the trunnion shaft. Has been done. Further, the protective gas is supplied from the stator A through the independent flow path 16 of the rotor A by the protective gas supply pipe 15 to the converter furnace body by the protective gas outlet pipe 17 similarly to the air.

The present invention is a fluid supply rotary joint for a converter configured as described above, and the central fluid pipe 8 which is expected to be worn can be easily removed or installed, so that the wear state can be surely confirmed, and Even if the wear progresses, only the worn central fluid pipe 8 can be replaced and the other parts can be used as they are without being removed.

[Effects of the Invention] As described above, the present invention uses two converter fluid supply rotary joints to transfer two or more kinds of converter fluids, including abrasive or corrosive converter fluids, to a converter furnace body. When supplying, it is possible to reliably confirm the wear state of the abradable or corrosive fluid passage, and it is possible to prevent leaks, mixing of dissimilar fluids, or various accidents accompanying them, and the replacement range is minimal. The present invention provides a fluid supply rotary joint for a converter whose maintenance cost is low because the replacement work is limited.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing the device of the present invention, and FIG. 2 is a vertical sectional view of a conventional technique. 1 ... Trunnion shaft, 2 ... Stator A, 3 ... Rotor A, 4 ... Central through space, 5 ... Powder supply pipe, 6 ... Stator B, 7 ... Rotor B, 8 …… Central fluid piping, 9 ……
Piping seal, 10 …… Converter furnace side piping, 11 …… Piping fixing bolt, 12 …… Air supply pipe, 13 …… Annular fluid passage, 14
…… Air outlet pipe, 15 …… Protective gas supply pipe, 16 …… Independent flow path, 17 …… Protective gas outlet pipe, 18 …… Rotary joint A,
19 …… Rotary joint B, 20 …… Sleeve.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ikki Yamate 46-59 Nakahara, Tobata-ku, Kitakyushu, Fukuoka 46-59 Nippon Steel Corporation Machinery & Plant Division (72) Inventor Kiyoharu Ito Tobata-ku, Kitakyushu, Fukuoka Nakahara 46-59 Nittetsu Plant Design Co., Ltd. (72) Inventor Yasuhiko Sugaya 7117-1, Komuro, Ina-cho, Kitadachi-gun, Saitama (Showa Giken Kogyo Co., Ltd. (56) References JP-B 57-53411 (JP, B2)

Claims (1)

[Scope of utility model registration request] 1. A rotor A (3) fixed to the end of a trunnion shaft (1) that supports and rotates a converter furnace body and rotates together with the trunnion shaft (1), and is connected to a fluid supply side and does not rotate. It consists of a stator A (2) and these rotors A (3)
One or more sets of fluid passages are bored inside and inside the stator A (2), and each fluid passage is provided in the sleeve (20) provided in the trunnion shaft or on the outer periphery of the trunnion shaft. A fluid supply rotary joint for a converter that simultaneously supplies two or more kinds of fluids including an abradable fluid or a corrosive fluid to the converter furnace body by making them communicate with each other. The through space (4) is provided, and the central fluid pipe (8) is inserted into the space (4),
It is fixed to the rotor A (3) and communicates with the fluid passage (10) provided in the trunnion shaft (1), and a separate rotary joint B (1) is provided at the fluid supply end of the central fluid pipe (8).
A fluid supply rotary joint for a converter characterized in that the rotor B (7) of 9) is fixed and communicated with the fixed end on the fluid supply side through the stator B (6).