WO2022247077A1 - Air-cooled blast furnace distributor - Google Patents

Abstract

The present invention belongs to the technical field of blast furnace distributor air cooling, and relates to an air-cooled blast furnace distributor, which comprises a distributor body and a rotary cylinder rotatably connected to the distributor body, wherein a cooling air duct and an air supply device are provided on the rotary cylinder; the air supply device is provided with an air inlet and an air outlet, the air inlet being in communication with a distributor inner cavity; and one end of the cooling air duct is connected to the air outlet, and the other end of the cooling air duct is in communication with the distributor inner cavity. According to the present invention, by means of providing the air supply device and the cooling air duct in the distributor, the air supply device accelerates the circular flow of nitrogen in the distributor; meanwhile, cooling gas is directionally introduced into a designated position through the cooling air duct, thereby achieving local fixed-point cooling, and improving the cooling efficiency.

Description

An air-cooled blast furnace distributor technical field

The invention belongs to the technical field of air-cooling of a blast furnace distributor, and relates to an air-cooled blast furnace distributor.

Background technique

It has been nearly 50 years since the bellless top distributor has been used in blast furnaces. It is often called "water-cooled gearbox" or "airtight box" in China. At present, there are many kinds of distributors. The common feature of these distributors is that they all have a rotating cylinder structure. The seal between the rotating cylinder and the fixed part of the distributor is sealed with nitrogen. At the same time, nitrogen can also be used as a cooling gas. The rotating cylinder is the key transmission part of the blast furnace distributor. The transmission parts on the rotating cylinder are in the cavity of the distributor and are eroded by the high temperature gas of the blast furnace. If the rotating cylinder and the parts installed on it are not cooled, the thermal deformation will cause component failure.

In the traditional technology, cooling gas is fed into the distributor cavity to cool the distributor cavity, but because the cooling gas cannot flow at a high speed, its heat transfer efficiency is very low, and it cannot effectively cool the rotating cylinder of the distributor and the parts on it . Later, a water cooling structure was adopted, such as the European patent with the publication number EP0116142B1, which adopts an open water cooling method for cooling, that is, an annular water tank is arranged above the rotating cylinder, the water inlet is aligned with the water tank for water supply, and detection elements such as a water level gauge are installed The water level is monitored in the annular water tank to prevent water from overflowing into the inner cavity of the distributor and the blast furnace. The bottom of the water tank is connected to the cooling part on the rotating cylinder. The road is discharged to the outside of the distributor. However, it has the following defects: dust easily enters the cooling water channel, and at the same time, due to the slow water flow, the cooling efficiency is low, the energy consumption is high, the water channel is often fouled and blocked, the water tank is also heavily dusted, and the maintenance cost is also high.

Another example is the Chinese patent whose publication number is CN102483304B, which adopts a ring-shaped rotary joint to seal the original ring-shaped water tank structure, set a fixed circuit and a rotating circuit, and provide a sealing structure between the fixed circuit and the rotating circuit. The pressurized water can enter the rotating cylinder to cool the parts, and then return to the fixed circuit to form a closed water cooling, but the structure of the closed water cooling is complicated and the cost is high.

Contents of the invention

In view of this, the object of the present invention is to solve the problem of low cooling efficiency of the rotating cylinder of the existing distributor, and provide an air-cooled blast furnace distributor.

To achieve the above object, the present invention provides the following technical solutions:

An air-cooled blast furnace distributor, comprising a distributor body and a rotating cylinder rotatably connected to the distributor body, the rotating cylinder is provided with a cooling air duct and an air supply device; the air supply device is provided with an air inlet, an outlet An air outlet, the air inlet communicates with the inner cavity of the distributor; one end of the cooling air duct is connected with the air outlet, and the other end communicates with the inner cavity of the distributor.

In this basic scheme, the air supply device and the cooling air duct are arranged on the rotating cylinder, and the air supply device sucks the cooling nitrogen of the distributor itself, so as to accelerate the circulation of nitrogen in the inner cavity of the distributor. Since the rotating cylinder is a high-heating component, The cooling nitrogen gas is directed into the rotating cylinder through the cooling air channel to cool it, improving the cooling efficiency of the rotating cylinder, and the air supply device can be used in forward and reverse directions, which can realize circulating cooling.

Further, the air supply device includes a fan, a fan shaft, and a roller; the fan is arranged on the rotating cylinder; one end of the fan shaft is connected to the fan, and the other end is connected to the roller; the inner cavity of the distributor is also provided with an annular Raceway; the roller is rollingly connected with the annular raceway, and drives the fan shaft to rotate; the roller rolls on the annular roller table, drives the fan shaft to rotate, thereby driving the fan to rotate.

Further, the annular raceway is fixedly connected to the distributor body, and the rollers are driven by the rotating cylinder to roll on the annular raceway; using the relative rotation relationship between the rotating cylinder and the distributor body, the rotation of the rotating cylinder itself is used as power to drive the fan Rotation, no need to provide a power source for the air supply device separately.

Further, the distributor body is also provided with a power device; the annular raceway is rotatably connected with the distributor body or the rotating cylinder; the power device is connected with the ring raceway and drives the ring raceway to rotate, and the power device Drive the ring raceway to realize the rotation of the roller, thereby driving the fan to run; the rotation direction of the ring raceway can be opposite to that of the rotating cylinder, which can increase the rotation speed of the roller and accelerate the nitrogen circulation cooling.

Further, the surface of the roller is a cylindrical surface or a drum-shaped surface or a tooth surface, and the shape of the annular raceway matches the roller; the raceway and the surface of the roller can be made of friction-enhancing materials or structures, such as rubber materials, and the surface is made of belts. Knurled structure of dimples.

Further, the air supply device further includes a transmission, the fan shaft is connected to the fan through a transmission, and the transmission is fixedly connected to the rotating cylinder, and the speed of the fan is increased through the transmission to accelerate the gas flow.

Further, the distributor body includes a driving device and a fixed housing; the rotating cylinder is rotationally connected with the fixed housing; the driving device is arranged on the fixed housing and connected with the rotating cylinder to drive the rotating cylinder to rotate.

Further, the cooling air passage is provided on the outer wall of the rotating cylinder; the cooling air passage is provided with a labyrinth structure; the labyrinth structure increases the contact area between the cooling gas and the rotating cylinder, thereby improving the cooling effect, and the labyrinth structure can improve the sealing performance.

Further, a chute assembly is also provided on the rotating drum, and the chute assembly includes a chute and a trunnion; the trunnion is fixedly connected to the chute, and the chute is arranged in the rotating drum and is rotatably connected to the rotating drum through the trunnion ;The trunnion is provided with a cooling hole, and the cooling hole is connected to the air outlet through a pipe; the cooling hole communicates with the inner cavity of the distributor; Apply local cooling.

Further, the number of the air supply device is at least one, and the number of the air supply device can be adjusted according to actual needs to improve the cooling effect.

The beneficial effects of the present invention are:

1) In the present invention, the cooling nitrogen in the inner cavity of the distributor is utilized, and the air supply device and the cooling air duct are used to perform forced air cooling on the rotating drum, and the cooling gas flows at a high speed in the cooling air duct of the labyrinth structure to improve its heat exchange efficiency ; And accelerate the circulating flow of cooling nitrogen, improve the overall cooling efficiency of the distributor. And for parts that are prone to heat, directional and fixed-point cooling are realized, which improves the cooling effect.

2) In the present invention, the fan power source can directly use the rotation of the rotating cylinder itself as power, without additional investment cost of the power source, the added components are conventional and simple, and the cost is also low; a separate power can also be used to drive the fan, when When the rotating cylinder is not rotating, the fan can still operate normally.

3) Compared with the existing water cooling structure, the present invention has simple structure and is easy to implement.

Other advantages, objects and features of the present invention will be set forth in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the investigation and research below, or can be obtained from Taught in the practice of the present invention. The objects and other advantages of the invention may be realized and attained by the following specification.

Description of drawings

In order to make the purpose of the present invention, technical solutions and advantages clearer, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

Fig. 1 is the overall structural representation of distributor among the present invention;

Fig. 2 is A-A partial sectional view of Fig. 1;

Fig. 3 is an enlarged view of part I of Fig. 1;

Fig. 4 is the partial sectional view of B-B of Fig. 1;

Fig. 5 is a schematic diagram of the arrangement of rollers in the vertical direction;

Fig. 6 is a schematic diagram of vertical arrangement of tapered rollers;

Figure 7 is a schematic diagram of the horizontal arrangement of the tapered rollers;

Fig. 8 is a schematic diagram of the arrangement of the drum rollers in the horizontal direction.

Reference signs: 1-distributor body; 2-rotating cylinder; 3-air supply device; 4-chute assembly; 5-maze structure; 6-nitrogen port; 7-driving device; 8-distributor inner chamber; Rotating drive gear; 102-rotating cylinder support; 103-tilting mechanism; 104-fixed shell; 105-fixed chassis; 201-rotating cylinder; 202-rotating cylinder chassis; Input shaft; 304-transmission; 305-air inlet; 306-fan shaft; 307-fan; 308-air outlet; 309-air supply pipe; 310-cooling air duct; 311-cooling air duct outlet; 401-trunnion; 402-chute.

Detailed ways

Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should not be construed as limiting the present invention; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, Enlargement or reduction does not represent the size of the actual product; for those skilled in the art, it is understandable that certain known structures and their descriptions in the drawings may be omitted.

In the drawings of the embodiments of the present invention, the same or similar symbols correspond to the same or similar components; , "front", "rear" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred devices or elements must It has a specific orientation, is constructed and operated in a specific orientation, so the terms describing the positional relationship in the drawings are for illustrative purposes only, and should not be construed as limiting the present invention. For those of ordinary skill in the art, the understanding of the specific meaning of the above terms.

Example 1

Please refer to Figures 1 to 4, which are an air-cooled blast furnace distributor, including a distributor body 1, a nitrogen port 6 is provided on the distributor body 1, a cooling air duct 310 and an air supply device 3 are provided on the rotating cylinder 2, The air supply device 3 is provided with an air inlet 305 and an air outlet 308, the air outlet 308 communicates with the cooling air duct 310 through the air supply pipe 309, and the air inlet 305 communicates with the inner cavity 8 of the distributor; wherein, the distributor body 1 includes a driving device 7. The fixed casing 104 and the rotating cylinder 2 ; the rotating cylinder 2 is rotationally connected with the fixed casing 104 ; the driving device 7 is installed on the fixed casing 104 , and drives the rotating cylinder 2 to rotate through the rotating drive gear 101 .

In this embodiment, the rotating cylinder 2 includes a rotating cylinder body 201 and a rotating cylinder chassis 202. The rotating cylinder body 201 is rotatably connected to the fixed housing 104 through the rotating cylinder support 102. The rotating cylinder chassis 202 is welded on the bottom of the rotating cylinder body 201. A cooling air duct 310 is installed on the body 201 and the rotating cylinder chassis 202, and a labyrinth structure 5 is arranged in the middle of the cooling air duct 310, and the outlet 311 of the cooling air duct communicates with the inner cavity 8 of the distributor.

In this embodiment, the air supply device 3 includes a fan 307, a fan shaft 306, and a roller 302; the fan 307 is installed on the rotating cylinder chassis 202, one end of the fan shaft 306 is connected with the fan 307, and the other end is connected with the transmission 304, and the roller 302 is fixedly installed On the input shaft 303 of the transmission 304, the transmission 304 is fixedly installed on the rotating cylinder 2, the fixed chassis 105 is welded to the lower part of the fixed housing 104, and the annular raceway 301 is fixedly installed on the fixed chassis 105, and the roller 302 rolls with the annular raceway 301. Cooperate and drive the fan shaft 306 to rotate.

Please refer to Figures 5 to 8. In this embodiment, the surface of the roller 302 is a cylindrical surface or a drum-shaped surface or a tooth surface, and the shape of the annular raceway 301 matches the roller 302; a friction wheel is used between the roller 302 and the annular raceway 301. Transmission form, between the roller 302 and the annular raceway 301 realizes rolling motion through frictional resistance, and there are various layout forms, the axis of the roller 302 is vertical or horizontal.

In this embodiment, a chute assembly 4 is installed on the distributor body 1, and the chute assembly 4 includes a chute 402 and a trunnion 401; 201, the driving device 7 drives the chute 402 to rotate at a limited angle around the central axis A1 of the trunnion 401 through the tilting mechanism 103; the trunnion 401 is provided with a cooling hole 312, and the cooling hole 312 communicates with the air outlet 308 through the air supply pipe 309. The trunnions 401 are cooled; the cooling holes 312 communicate with the inner cavity 8 of the distributor.

Example 2

The difference between this embodiment and Embodiment 1 is that the annular raceway 301 is rotatably mounted on the fixed chassis 105 through a slewing bearing, the outer circle of the annular raceway 301 is provided with a gear, and the fixed chassis 105 is also equipped with a motor, which drives the ring through the gear. The raceway 301 rotates.

When the rotating cylinder 2 is not rotating, the motor can also drive the ring raceway 301 to rotate, thereby driving the roller 302 to rotate through friction, so as to realize the continuous operation of the fan 307 .

Example 3

The difference between the present embodiment and Embodiment 2 is that the annular raceway 301 is rotatably mounted on the rotary cylinder 2 through a slewing bearing, and a motor is installed on the fixed chassis 105, and the motor drives the annular raceway 301 to rotate, thereby driving the roller 302 to rotate through friction, Realize that the fan 307 runs continuously.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements, without departing from the spirit and scope of the technical solution, should be included in the scope of the claims of the present invention.

Claims (10)

1. An air-cooled blast furnace distributor, comprising a distributor body and a rotating cylinder rotatably connected to the distributor body, characterized in that: the rotating cylinder is provided with a cooling air duct and an air supply device; the air supply device is provided with An air inlet and an air outlet, the air inlet communicates with the inner cavity of the distributor; one end of the cooling air duct is connected with the air outlet, and the other end communicates with the inner cavity of the distributor.
2. An air-cooled blast furnace distributor according to claim 1, characterized in that: the air supply device includes a fan, a fan shaft, and a roller; the fan is arranged on a rotating cylinder; one end of the fan shaft is connected to the fan, The other end is connected with the roller; the inner cavity of the distributor is also provided with an annular raceway; the roller is rollingly connected with the annular raceway, and drives the fan shaft to rotate.
3. An air-cooled blast furnace distributor according to claim 2, characterized in that: the annular raceway is fixedly connected with the distributor body, and the rollers are driven by the rotating cylinder to roll on the annular raceway.
4. An air-cooled blast furnace distributor according to claim 2, characterized in that: the distributor body is also equipped with a power device; the annular raceway is rotatably connected with the distributor body or the rotating cylinder; the power device It is connected with the ring raceway and drives the ring raceway to rotate.
5. An air-cooled blast furnace distributor according to claim 2, characterized in that: the surface of the roller is a cylindrical surface or a drum surface or a tooth surface, and the shape of the annular raceway matches the roller.
6. The air-cooled blast furnace distributor according to claim 2, wherein the air supply device further includes a transmission, the fan shaft is connected to the fan through a transmission, and the transmission is fixedly connected to the rotating cylinder.
7. An air-cooled blast furnace distributor according to claim 1, characterized in that: the distributor body includes a driving device and a fixed housing; the rotating cylinder is rotatably connected to the fixed housing; The casing is connected with the rotating drum to drive the rotating drum to rotate.
8. An air-cooled blast furnace distributor according to claim 1, characterized in that: the cooling air passage is arranged on the outer wall of the rotating cylinder; a labyrinth structure is arranged in the cooling air passage.
9. An air-cooled blast furnace distributor according to claim 1, characterized in that: a chute assembly is also provided on the rotating cylinder, and the chute assembly includes a chute and a trunnion; the trunnion is fixedly connected with the chute, so The chute is arranged in the rotating cylinder, and is rotatably connected with the rotating cylinder through a trunnion; a cooling hole is provided in the trunnion, and the cooling hole is connected to the air outlet through a pipe; the cooling hole communicates with the inner cavity of the distributor.
10. An air-cooled blast furnace distributor according to claim 1, characterized in that the number of said air supply device is at least one.

Images