JP5351838B2 - Auto coupler equipment for hot metal pretreatment equipment - Google Patents

Abstract

The automatic coupling device for connecting tube on a pan side and a tube (102) on a vehicle side (200) in a device for pretreating molten pig iron, comprises elastic limbs, which surround the tube at the vehicle side, a safety pipe, which surrounds the tube at the vehicle side and the elastic limbs, a flange, which exists itself above the safety pipe and has a through-hole, which is connected with the upper end of the tube at the vehicle side, a base (204), which supports the elastic limbs at the lower end of the elastic limbs, and a teflon-O-ring. The automatic coupling device for connecting tube on a pan side and a tube (102) on a vehicle side (200) in a device for pretreating molten pig iron, comprises elastic limbs, which surround the tube at the vehicle side, a safety pipe, which surrounds the tube at the vehicle side and the elastic limbs, a flange, which exists itself above the safety pipe and has a through-hole, which is connected with the upper end of the tube at the vehicle side, a base (204), which supports the elastic limbs at the lower end of the elastic limbs, a teflon-O-ring, which is attached on the upper end surface of the flange, and a non-return valve (116) in the tube at the pan side, where recesses for supporting the elastic limbs are formed against the elastic limbs in the lower part of the flange and the upper part of the base, and the lower and the upper parts of the elastic limbs are supported directly by the recesses, which are formed in the lower part of the flange and the upper part of the base. Grooves are formed in the upper part of the O-ring and are concentric O-rings. The depth of the recesses is 1/10-1/5 of the length of the elastic limbs.

Description

  The present invention relates to an autocoupler apparatus for hot metal pretreatment equipment that enables an improvement of hot metal quality by bubbling an inert gas in a ladle during a steelmaking process.

  In the steelmaking process, when the pig iron coming out of the blast furnace is transferred to the electric furnace, a cart that can move the pig iron into the ladle and move the ladle is used. In order to shorten the time of the steelmaking process, a process for removing impurities can be added even when the cart is loaded with a ladle containing pig iron, and this process is called a hot metal pretreatment process. Also, a ladle and a carriage manufactured so as to be able to perform such hot metal pretreatment process are called hot metal pretreatment equipment. The hot metal pretreatment process is a process in which an inert gas is supplied to the inside of the ladle and the hot metal is bubbled from the lower part of the ladle to separate substances such as phosphorus, sulfur and gas. At this time, the piping for supplying the inert gas is connected to the ladle side piping via the bogie side piping, and the coupler apparatus is used to connect the bogie side piping to the ladle side piping. .

Such a hot metal pretreatment process is a core process for determining the quality of the subsequent molten steel. However, in the case of the conventional coupler apparatus, the bogie side and the ladle side pipes are mainly manually coupled. When manually coupled in this way, the work efficiency is extremely inferior and the molten steel is scattered by the operator. There were disadvantages such as being exposed to dangerous conditions.
Even when an auto coupler is used instead of manual operation, the part that connects the bogie-side piping and the ladle-side piping is already exposed to the outside, so when the ladle is seated on the bogie or when the bogie moves Occasionally, molten steel or slag is scattered and equipment damage occurs at the connection between the carriage and the ladle, which must be replaced from time to time, thereby consuming a lot of time and money. was there.

  In the case of hot metal pretreatment equipment, the ladle is tilted before the hot metal is transferred to the electric furnace, and the slag covered on the molten steel is removed. Even when such slag is removed, if the inert gas can be bubbled from the lower part, the bubbling effect can be maximized and the slag can easily enter the inclined side of the ladle. It is also possible to obtain an attendant effect that makes it very easy to remove the slag. However, in the existing hot metal pretreatment equipment, when the ladle is tilted, an unbalanced load is generated on the packing between the auto coupler and the packing is biased to one side. This may cause moisture to be generated on the opposite side of the tilt. become. As a result, about 1/3 of the inert gas actually injected escapes with wet air, and eventually, there is a problem that stirring through bubbling cannot be performed when the ladle is tilted.

  Furthermore, even in the process of coupling the ladle and the carriage, when the ladle is seated on the carriage, the right and left deviations allowed between the ladle side pipe and the carriage side pipe are not large. There was a disadvantage that a lot of time was wasted to settle the ladle within the range. Furthermore, the ladle moves frequently, and a plurality of ladles are used alternately on one carriage, and the tolerance range of tolerance is that the size and shape of the ladle can change slightly over a long period of use. In the narrow case, it was much more difficult to get the ladle seated correctly on the carriage.

  In order to solve the above-mentioned problems, the present invention has been created by many years of research and can prevent damage from foreign matters such as melt splash and slag when hot metal is discharged. An object of the present invention is to provide an autocoupler device that can be operated even under adverse conditions in the surrounding environment, can reduce the operation time, and has improved quality and productivity.

  The present invention relates to an automatic coupler apparatus for connecting a ladle side pipe and a trolley side pipe in a hot metal pretreatment facility, and a plurality of elastic members arranged so as to surround the trolley side pipe; A protective pipe that surrounds the pipe and the elastic member; a flange that is located on the upper side of the protective pipe and has a through hole connected to the upper end of the pipe on the cart side; an auto that supports the elastic member at the lower end of the elastic member A coupler base; and a Teflon-made O-ring attached to the upper end surface of the flange, and a recess for supporting the elastic member at a position corresponding to the elastic member at a lower portion of the flange and an upper portion of the base portion The upper end and the lower end of the elastic member are directly supported by the concave portion formed at the lower portion of the flange and the upper portion of the base portion of the autocoupler, respectively. On coupler devices.

  The present invention also relates to an autocoupler characterized in that a large number of grooves having concentric circles with the O-ring are provided in the upper portion of the O-ring.

  The present invention also relates to an autocoupler characterized in that the depth of the recess is 1/10 to 1/5 of the length of the elastic member.

  The present invention also relates to an autocoupler characterized by further including a check valve in the piping on the ladle side or the piping on the carriage side.

  The present invention is also a hot metal preliminary processing facility provided on a carriage in the autocoupler device, wherein a seating portion is formed on a side surface of the ladle, and the O-ring is brought into close contact with a lower end surface of the seating portion. The present invention relates to a hot metal pretreatment facility that is sealed and coupled so as to communicate with each other from a bogie side pipe to a ladle side pipe, and in which the ladle can be tilted by a tilting device.

According to the present invention, since the coupled portion of the bogie-side piping and the ladle-side piping is not exposed to the outside, foreign matter such as splash or slag of the melt is generated even when the hot metal is scattered. Where the auto-coupling device can be prevented from being damaged without touching the auto-coupling device, the life of the auto-coupling device can be improved.
Further, even if the piping on the carriage side and the piping on the ladle side are tilted while being coupled to each other, the packing is not biased to one side, so that the inert gas can be bubbled in the ladle without moisture. If bubbling of an inert gas is carried out at the lower part of the carriage, the slag is pushed in the direction in which the carriage is inclined, so that a large amount of slag can be easily removed. When the hot metal is sent to the electric furnace through such a method, the hot metal is leveled and high quality hot metal can be obtained.

  In addition, the tolerance that can be allowed when the ladle is seated on the trolley has increased, so that the ladle can be seated on the trolley more easily and quickly. Therefore, it is possible to shorten the time required for the cradle to be seated on the carriage and to improve the troublesomeness of the work, but it is possible to shorten the operation time and improve the productivity.

It is a front view of the hot metal preliminary treatment equipment to which the autocoupler device of the present invention is applied. It is drawing of the hot metal preliminary processing equipment which shows the state which inclined the trolley | bogie via the tilting apparatus. It is drawing which shows the ladle of the hot metal preliminary processing equipment of this invention. It is a perspective view of the base end part of the trolley | bogie with which the auto coupler apparatus of this invention was mounted | worn. It is a sectional side view of the autocoupler device of the present invention. It is sectional drawing along the AA direction of FIG.

Embodiments of the present invention will be described with reference to the drawings.
1a and 1b are drawings showing the entire hot metal pretreatment facility. The ladle (100) is provided with a ladle-side pipe (102) and a ladle-side seating portion (104), and an inert gas such as nitrogen or argon is introduced into the base end (204) on the cart (200) side. A supply-side piping (202) is provided. A cover for protecting the base end (204) on the cart side from hot metal, slag, etc. is attached to the cart (200). When the ladle (100) is seated on the carriage (200), the ladle side pipe (102) and the carriage side pipe (202) are connected by the auto coupler device (300). In FIG. 1a and FIG. 1b, two autocouplers (300) are provided on the base end (204) on the cart side, but the number of autocouplers (300) is not limited to this.

  As the pipe (102) on the ladle side, STPG high-pressure pipe steel pipe (Sch # 80) can be used in order to cope with adverse conditions in the field. The bogie-side pipe (202) is also made of the same material as the ladle-side pipe (102), but a flexible steel hose is used in part so that the ladle can be tilted. Further, a check valve (116) is used for the ladle side pipe (102) to prevent backflow, and such a check valve can also be used for the carriage side pipe (202).

  Also, as can be seen from FIG. 1b, the ladle (100) can be tilted via the tilting device in a state where the ladle (100) and the carriage (200) are connected by the autocoupler device (300). The tilted angle must be sufficient to be easy to remove the slag, and the tilted angle in this embodiment is a maximum of 35 °.

  FIG. 2 is a detailed view of the seating portion (104) on the ladle side. A ladle-side seating portion (104) is formed on the side surface of the ladle (100). One end of the pipe (102) on the ladle side is connected to the passage of the seating part on the ladle side. Since the ladle (100) moves well, it is preferable to simplify and minimize the configuration of the ladle side pipe (102) and the ladle side seating part (104).

FIG. 3 is an installation view of the autocoupler device (300) of the present invention.
The autocoupler (300) according to the present invention is configured such that an inert load does not leak due to the occurrence of an offset load when the ladle (100) is seated. The auto coupler device (300) is provided at the base end (204) on the cart side, and is connected to the piping (202) on the cart side. Further, on the base end (204), a pair of guide portions (208) are formed so as to be inclined so that surfaces facing each other become closer toward the bottom. Since the distance between the lower ends of the two guide portions (208) is substantially the same as the width of the seat portion (104) on the ladle side, the ladle (100) is seated on the carriage (200). Then, the seating portion (104) of the ladle (100) is guided by the guide portion (208), and the passage (108) of the seating portion on the ladle side comes to an accurate position on the autocoupler device (300). become able to.

  4 is a cross-sectional view of the autocoupler device (300), and FIG. 5 is a cross-sectional view taken along the line AA of FIG. In FIG. 4, the pipe (202) passing through the autocoupler device (300) is surrounded by a double protection pipe (306), and a heat insulating material (308) is inserted between the double protection pipes (306), so that the temperature is high. However, the internal components of the protective tube (306) are prevented from being deformed.

  A flange (310) is disposed on the upper portion of the protective pipe (306), and the flange (310) has a through hole connected to one end portion of the carriage-side pipe (202). The joint between the one end and the through hole is processed to be sealed from the outside by welding or the like. Therefore, when the inert gas is supplied through the piping (202) on the carriage side, the inert gas exits to one end of the piping (202) and is connected to the flange (310) through the through hole (311) of the flange (310). 310) and enters the ladle through the ladle side pipe (102) via the ladle side seating passage (108).

  An O-ring (314) is attached to the upper surface of the flange (310). A protrusion (312) is formed on the upper surface of the flange (310), and a recessed portion is formed on the lower portion of the O-ring (314) so as to correspond to the protrusion (312). Combined with ring (314). An O-ring cover is disposed on the upper side of the flange (310) and the O-ring so as to surround the O-ring, and this O-ring cover serves to prevent the flange (310) and the O-ring (314) from slipping upward. Fulfill.

  In general, for the O-ring (314), in order to make the crimping effective, a material having higher elasticity than a strong material is selected. The ring can be easily damaged. Accordingly, the O-ring (314) of the present invention is made of a strong Teflon material so as to prevent such damage to the O-ring and withstand the surrounding heat. If such a material is used, it is possible to prevent the O-ring from being easily broken, so that the time and labor required to replace the O-ring can be saved.

  The O-ring (314) was constructed as an integral type rather than a plurality of existing O-rings. In the case of using a plurality of O-rings, there is a disadvantage that a deviation allowed for seating the ladle on the carriage is small, but it is advantageous for packing. In the present invention, in order to overcome such disadvantages of the integral O-ring made of a Teflon material that is insufficient in elasticity but strong, a large number of grooves (315) are formed in the upper portion of the O-ring. The multiple grooves (315) are concentric with the O-ring (314) when viewed from above. Through this, when the O-ring comes into contact with the lower part of the seating part (104) on the ladle side, the sealing can be made firm. When using an O-ring made of a Teflon material having high strength but low elasticity, it is more preferable to form such a groove (315) to make the seal tight. Further, if the passage of the seating portion (104) on the ladle side is seated only in the portion where the plurality of grooves (315) are formed, packing is possible, so that the seating portion on the ladle side (substantially ( 104) and the left-right deviation between the centers of the holes in the upper part of the flange (310) can be increased.

  Four elastic members (302) are arranged between the protective pipe (22) and the carriage-side pipe (202) so as to surround the carriage-side pipe (202) with an interval of 90 °. In this example, a spring (302) was used as the elastic member (302). The position of the spring (302) is determined by the shaft (304) fixed to the lower part of the flange (310). When a load is applied to the flange (310), both the flange (310) and the shaft (304) move downward, whereby the spring (302) is elastically compressed downward, so that the elastic force of the spring (302) Will act upward. At this time, in the present invention, unlike the existing ones, the guides for preventing detachment surrounding the respective springs are deleted so that the four springs can move to each.

  In the following, the details of the arrangement of the spring without the spring guide for preventing separation will be described in detail. In the case where there is a spring guide for preventing detachment, the plurality of springs cannot move to each other but move in the same manner. In such a case, it may be advantageous to move the ladle only up and down, but if the ladle must be tilted, the problem of dampness occurs. In the present invention, recesses (318, 320) having a diameter corresponding to the diameter of the spring and a certain depth are formed in the lower part of the flange (310) and the upper part of the base part (316) of the autocoupler. 320) and the spring (302) and the shaft (304) are sandwiched between them to support the spring.

  The depth of the recesses (318, 320) is preferably 1/10 to 1/5 the length of the spring. When the depth of the recesses (318, 320) is less than 1/10, the effect of supporting the spring is small and the spring is detached, and conversely, when the depth of the recesses (318, 320) exceeds 1/5. , The spring will be prevented from moving to each. In this case, the position of each spring is determined by the shaft, the upper part is supported only by the concave part (318) at the lower part of the flange (310), and the lower part is supported only by the concave part (320) at the upper part of the base part (316) of the autocoupler. The four springs can each move according to the distance between the lower recess (318) of the flange (310) and the upper recess (320) of the base (316) of the autocoupler. That is, even when the ladle is tilted, the spring in the tilted direction has a relatively short length, and the spring positioned in the opposite direction has a relatively long length. Thereby, even if the ladle (100) is tilted, the sealing is not loosened not only in the tilted direction but also in the opposite direction. That is, when the ladle (100) is tilted, the four internal springs (302) of the autocoupler (300) can move to each other, and the same load is applied to the entire portion coupled by the autocoupler (300). This can be done. As a result, it is possible to prevent the cart (100) from excessively sliding in the tilted direction due to an unbalanced load, the sealing is not sufficient in the tilted opposite direction, and the inert gas dampness is not generated in this portion. . Through this, it becomes possible to bubble the inert gas without being damp even in the tilted state.

  In the case of the present invention, as a result of configuring the O-ring integrally and supporting the spring through the recess without the spring guide, the left-right deviation when the ladle (100) is seated on the carriage (200) is the existing ± 20 mm. It became possible to apply within ± 30mm. Accordingly, the ladle (100) can be more easily seated on the carriage (200).

The operating principle of the autocoupler is as follows.
When the autocoupler (300) is attached to the base end (204), the O-ring (314) protrudes upward from the upper end surface of the base end (204) by a certain distance. Therefore, when the ladle (100) is seated on the carriage (200), the lower end surface of the seating portion (104) comes into contact with the O-ring (314) of the autocoupler (300), and the load of the seating portion (104) The O-ring (314) and the flange (310) move downward, and the elastic force by the spring (302) acts upward. Thereby, the O-ring (314) is pressure-bonded by the load of the seating portion (104) and the elastic force of the spring (302). This creates a space sealed from the outside surface between the ladle side pipe (102) and the carriage side pipe (202). Therefore, when the inert gas is supplied through the carriage-side pipe (202), it is possible to prevent the gas from leaking to the outside.

  After moving the ladle toward the slag port, the ladle is pushed toward the slag port via the tilting device in a state where the ladle side pipe (102) and the carriage side pipe (202) are coupled to each other. . If the ladle is in a horizontal state, the slag cannot be pushed to one side via bubbling, but if the inert gas is bubbled in a tilted state, the slag is pushed in the direction in which the carriage is tilted. Therefore, a large amount of slag pushed toward one side can be easily removed.

  A cleaner capable of purging gas can be provided around the autocoupler (300) to remove dust and the like accumulated on the O-ring (314). It is possible to remove dust and the like accumulated on the O-ring (314) by instructing the PLC so that the foreign matter is automatically cleaned when the ladle (100) is seated and purging gas.

  The above-described embodiments of the present invention are merely illustrative, and the present invention is not limited thereto, and various changes and improvements can be made.

Claims (4)

In the auto coupler device for connecting the ladle side piping and the trolley side piping in the hot metal pretreatment facility,
A plurality of elastic members arranged in a form surrounding the carriage-side piping;
Protective pipes surrounding the trolley-side piping and elastic members;
A flange having a through hole located on the upper side of the protective tube and connected to the upper end of the bogie side pipe;
A base portion of an autocoupler that supports the elastic member at a lower end portion of the elastic member; and an O-ring made of polytetrafluoroethylene material attached to an upper end surface of the flange,
A recess for supporting the elastic member is formed at a position corresponding to the elastic member at a lower portion of the flange and an upper portion of the base portion,
The upper and lower ends of the elastic member are directly supported by the recesses formed at the lower part of the flange and the upper part of the base part of the autocoupler, respectively, and the respective elastic members move to each other, and the flange moves between the base part and the protection part. Movable relative to the tube,
An autocoupler device having two or more grooves concentric with the O-ring at an upper portion of the O-ring.   2. The autocoupler according to claim 1, wherein a depth of the recess is 1/10 to 1/5 of a length of the elastic member. Auto coupler according to claim 1 or claim 2, further comprising a check valve in the ladle side of the pipe or the truck side of the pipe. A hot metal preliminary treatment facility provided on a carriage in the autocoupler according to claim 1 or 2 ,
A seat is formed on the side of the ladle,
The O-ring is tightly sealed with the lower end surface of the seating portion by the autocoupler and is coupled so as to communicate with each other from the carriage side pipe to the ladle side pipe,
Hot metal pretreatment equipment that can tilt the ladle with a tilting device in the coupled state.

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