CN219324756U - Composite construction flows steel center brick - Google Patents

Abstract

The utility model relates to a refractory brick, in particular to a composite structure flow steel center brick. The composite structure flow steel center brick is characterized in that the upper part of the flow steel center brick is communicated with a pouring pipe brick, and the flow steel center brick comprises a flow steel center brick body and a reducing transition brick; the pouring pipe brick, the reducing transition brick and the steel flow center brick body are sequentially communicated from top to bottom; the bottom surface of the reducing transition brick is communicated with the top surface of the flow steel center brick body; the inner diameter of the bottom surface of the variable-diameter transition brick is larger than the inner diameter of the pouring tube brick and smaller than the inner diameter of the central pouring hole of the steel flow central brick body; the side wall of the flow steel center brick body is provided with a channel dividing hole. The diameter of the central hole injection part is large, the interval between the inner wall divided channels and the multiple holes is wide, and no burr exists. The novel flow steel center brick for pouring has reasonable structure and size of the center pouring hole, has smooth surface and no burrs in the processing process, resists molten steel scouring, and can reduce pollution to molten steel and exogenous inclusion compared with the traditional flow steel center brick.

Description

Composite construction flows steel center brick

Technical Field

The utility model relates to a refractory brick, in particular to a novel composite structure flow steel center brick.

Background

When pouring a plurality of steel ingots at one time by adopting a down pouring method, molten steel flowing out of a ladle nozzle sequentially passes through a pouring pipe brick, a steel flow center brick and a direct current runner brick to enter an ingot mould. In order to ensure that the molten steel has enough static pressure during pouring and can be filled into an ingot mould, the pouring pipe brick is generally vertical and 200-300 mm higher than the ingot mould, and the molten steel vertically falls from the height of the pouring pipe brick to flow into a steel flow center brick. The steel flow center brick has the function of shunting the molten steel through the channel dividing holes, so that the molten steel flows into each ingot mould and a plurality of steel ingots can be cast at one time in a shorter time.

When molten steel vertically falls from the height of the pouring pipe brick and flows into the steel flow center brick, the steel flow center brick is flushed by gravity of the vertically falling molten steel, refractory particles fall off, joints are not tight, and the steel flow center brick is corroded and burst when serious.

Secondly, when the steel flow center brick finishes pouring of a plurality of steel ingots at one time, the diameter of a center pouring hole is smaller, the distance between the inner wall channel multi-holes is narrow, steel leakage can be generated due to the fact that the channel multi-holes are blasted due to the narrow distance when molten steel is flushed, burrs are easy to generate in the channel multi-holes due to the small aperture in the processing process, and the burr refractory materials are easy to fall off in the flowing process of molten steel and then react with the molten steel or remain in the steel to form inclusions.

When a large amount of nonmetallic materials are doped in the molten steel, the molten steel is polluted, and the quality and the qualification rate of the cast steel ingot are seriously affected.

Disclosure of Invention

In order to at least solve the technical problems that the refractory material loss of the flow steel center brick is large, refractory material particles fall off, a large amount of nonmetallic materials are doped in the molten steel, the molten steel is polluted, the quality and the qualification rate of steel ingots are seriously influenced and the like in the prior art, the utility model provides the flow steel center brick with a composite structure, the flow steel center brick is communicated with a pouring pipe brick, and the flow steel center brick comprises:

the steel flow center brick comprises a steel flow center brick body, wherein a center injection hole is formed in the axial direction of the steel flow center brick body, and a channel dividing hole is formed in the side wall of the steel flow center brick body;

a reducing transition brick, the reducing transition brick is axially provided with a transition hole,

the lower end hole diameter of the transition hole is larger than the inner diameter of the pouring tube brick and smaller than the inner diameter of the central pouring hole;

the pouring pipe brick, the reducing transition brick and the steel flow center brick body are sequentially communicated from top to bottom.

Optionally, a first conical table groove which is communicated with the central hole and gradually contracts towards the central hole is formed in the top surface of the steel flow central brick body;

the first conical table groove is coaxial with the central injection hole, and the bottom aperture of the first conical table groove is larger than the inner diameter of the central injection hole;

the bottom of the first conical bench groove is distant from the channel dividing hole.

Optionally, the reducing transition brick is in an inverted horn mouth shape, and the reducing transition brick is embedded in the first conical table groove.

Optionally, the outer wall of the reducing transition brick includes: the first outer cone frustum, the second outer cone frustum and the first outer cylinder;

the first outer cone frustum, the second outer cone frustum and the first outer cylinder are sequentially connected from top to bottom,

the top surface of the first outer cone frustum is connected with the pipe injection brick, and the first outer cylinder is embedded into the first cone frustum groove;

the first outer cone frustum, the second outer cone frustum and the first outer cylinder are coaxial and integrally formed.

Optionally, the bottom surface outer diameter of the first outer cone frustum is smaller than the top surface outer diameter of the second outer cone frustum;

the outer diameter of the first outer cylinder is equal to the outer diameter of the bottom surface of the second outer cone frustum and is smaller than the bottom aperture of the first cone frustum groove;

the height of the first outer cone frustum is larger than that of the first outer cylinder and smaller than that of the second outer cone frustum.

Optionally, the inner wall of the reducing transition brick includes: an inner cylinder and an inner cone frustum;

the inner cylinder is coaxial with the inner cone table and is communicated with the inner cone table from top to bottom in sequence,

the top surface of the inner cylinder is communicated with the pouring pipe brick, and the bottom surface of the inner conical table is communicated with the central pouring hole of the flow steel central brick body.

Optionally, the inner diameter of the inner cylinder is equal to the inner diameter of the top surface of the inner conical table and is smaller than the inner diameter of the bottom surface of the inner conical table;

the inner diameter of the central injection hole of the steel flow central brick body is larger than the inner diameter of the bottom surface of the inner cone frustum;

the height of the inner cylinder is larger than that of the inner cone frustum and smaller than that of the second outer cone frustum,

the height of the inner cone frustum is larger than that of the first outer cone frustum.

Optionally, the number of the channel holes is plural, the channel holes are uniformly distributed along the circumferential direction of the steel flow center brick body, and the plurality of the channel holes are communicated with the center injection hole.

Optionally, one end of the split hole far away from the central injection hole is provided with a second conical table groove extending outwards,

the bottom of the second conical table groove is communicated with the lane hole, and the hole of the second conical table groove gradually contracts along the direction of the lane hole;

the aperture of the bottom of the second conical table groove is larger than the inner diameter of the lane hole;

the second conical bench groove and the split hole are coaxial and integrally formed.

Optionally, the outer wall of the flow steel center brick body is regular polygon;

the number of the lane holes is equal to that of the edges of the regular polygon, and the lane holes are distributed in the middle of each side edge of the regular polygon. The novel flow steel center brick for pouring has reasonable structure and size of the center pouring hole, has smooth surface and no burrs in the processing process, resists molten steel scouring, and can reduce pollution to molten steel and exogenous inclusion compared with the traditional flow steel center brick.

The technical scheme of the utility model has the following beneficial effects:

the composite structure steel flow center brick is communicated with the pouring pipe brick, and comprises a steel flow center brick body and a reducing transition brick; the pouring pipe brick, the reducing transition brick and the steel flow center brick body are sequentially communicated from top to bottom; the bottom surface of the reducing transition brick is communicated with the top surface of the flow steel center brick body; the inner diameter of the bottom surface of the variable-diameter transition brick is larger than the inner diameter of the pouring tube brick and smaller than the inner diameter of the central pouring hole of the steel flow central brick body; the side wall of the flow steel center brick body is provided with a channel dividing hole. The diameter of the central hole injection part is large, the interval between the inner wall divided channels and the multiple holes is wide, and no burr exists. The novel flow steel center brick for pouring has reasonable structure and size of the center pouring hole, has smooth surface and no burrs in the processing process, resists molten steel scouring, and can reduce pollution to molten steel and exogenous inclusion compared with the traditional flow steel center brick.

Drawings

FIG. 1 is a schematic structural view of a composite structural flow steel center brick of the present utility model.

FIG. 2 is a cross-sectional view of a composite structural flow steel center block of the present utility model.

Fig. 3 is a block diagram of the body of the flow steel center brick.

Fig. 4 is a cross-sectional view of a flow steel center brick body.

Fig. 5 is a block diagram of a variable diameter transition brick.

Fig. 6 is a cross-sectional view of a variable diameter transition tile.

In the figure, a 1-flow steel center brick body; 2-reducing transition bricks; 3-lane holes; 4-an inner cylinder; 5-inner cone frustum; 6-a first outer cone frustum; 7-a second outer cone frustum; 8-an outer cylinder; 9-a first conical table groove; 10-a second conical table groove; 11-center hole injection.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the embodiments of the present utility model will be described in further detail with reference to the accompanying drawings.

In the description of the present utility model, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. refer to the orientation or positional relationship based on that shown in the drawings, merely for convenience of description of the present utility model and do not require that the present utility model must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. The terms "coupled," "connected," "communicating," and "disposed" as used herein are to be construed broadly and may be, for example, fixedly connected or detachably connected; can be directly connected or indirectly connected through an intermediate component; either a wired electrical connection, a radio connection or a wireless communication signal connection, the specific meaning of which terms will be understood by those of ordinary skill in the art as the case may be.

In the description of the present utility model, it should be understood that the terms "first" and "second" are used to define the components, and are merely for convenience in distinguishing the corresponding components, and the terms are not meant to be construed as limiting the scope of the present utility model unless otherwise specified. The utility model will now be described in further detail with reference to the accompanying drawings.

The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

When the steel ingot is poured by adopting a down-pouring method, molten steel flowing down from a ladle nozzle is introduced into a steel flow center brick through a pouring pipe brick. As shown in fig. 1, the present utility model discloses a composite structure flow steel center brick communicated with a pouring pipe brick, the flow steel center brick comprising: the steel flow center brick body 1 and the variable diameter transition brick 2, a center injection hole 11 for receiving molten steel falling from high altitude is formed in the axial direction (middle position) of the steel flow center brick body 1, and a channel dividing hole 3 for dividing the molten steel into ingot molds is formed in the side wall of the steel flow center brick body 1; the diameter-variable transition brick 2 is axially provided with transition holes for buffering gravity flushing of molten steel, increasing the aperture of the central pouring hole 11 and increasing the interval between the inner wall channel-dividing holes 3, the aperture of the top end of the transition hole is consistent with the inner diameter of the pouring tube brick, and the aperture of the lower end of the transition hole is gradually expanded from top to bottom in a way that the aperture of the lower end of the transition hole is larger than the inner diameter of the pouring tube brick. According to the conventional connection mode, the pouring pipe brick, the reducing transition brick 2 and the steel flow center brick body 1 are sequentially communicated from top to bottom, so that gravity scouring cannot be generated on a connection gap between the reducing transition brick 2 and the steel flow center brick body 1 when molten steel falls down, and the hole diameter of the lower end of a transition hole is smaller than that of the center pouring hole 11.

Further, in order to ensure tight joints between the steel flow center brick main body 1 and the reducing transition brick 2, a first conical table groove 9 which is communicated with a center pouring hole 11 and gradually contracts towards the direction of the center pouring hole 11 is formed in the middle of the top surface of the steel flow center brick main body 1, meanwhile, in order to reduce the stress surface of the steel flow center brick main body 1, which is washed by the gravity perpendicular to molten steel, to reduce impurities generated by washing and to reduce unnecessary damage of the steel flow center brick main body 1, the first conical table groove 9 and the center pouring hole 11 are coaxially arranged, the bottom aperture of the first conical table groove 9 is larger than the inner diameter of the center pouring hole 11, and the bottom of the first conical table groove 9 is required to be arranged at a distance from the channel dividing hole 3 during improvement.

As shown in fig. 1 and 2, the thickness of the wall surface of the flow steel center brick main body 1, which is contacted with molten steel, is unchanged, and the outer wall of the variable-diameter transition brick 2 is connected by extrusion, so that when the flow steel center brick main body 1 and the variable-diameter transition brick 2 are built to be closely combined, the joint of the building materials is tight at the periphery, and meanwhile, unqualified steel ingots are not mixed due to the scouring of the molten steel. Specifically, the outer wall of the variable-diameter transition brick 2 is in an inverted horn mouth shape and is embedded in the first conical table groove 9, so that the variable-diameter transition brick 2 and the flow steel center brick main body 1 are installed seamlessly.

Furthermore, the sealing performance is good due to the connection of the truncated cone and the circular groove and the embedded extrusion mode of the cylinder and the truncated cone groove, and the sealing performance is correspondingly enhanced along with the increase of the fluid pressure in the pipe. As shown in fig. 5, the upper part of the reducing transition brick 2 is provided with a conical frustum shape on the outer wall thereof for more tightly connecting and communicating with the pouring tube brick, the reducing transition brick 2 also needs to play a role of supporting the pouring tube brick, and the outer wall thereof is provided with a first outer conical frustum 6 and a second outer conical frustum 7 (step shape) which are sequentially connected from top to bottom. When the diameter-variable transition brick 2 and the steel flow center brick main body 1 are in embedded seamless installation, in order to slow down the shaking of the diameter-variable transition brick 2 due to the influence of molten steel gravity, the lower end of the outer wall of the diameter-variable transition brick is designed into a cylinder shape (a first outer cylinder 8) during structural design, because the appearance of the cylinder is axisymmetric and has no shape change, the stress distribution is more uniform, and the bearing capacity is higher. The first outer cylinder 8 is embedded into the first conical frustum groove 9, the top end of the first outer cylinder is connected with the bottom end of the second outer conical frustum 7, the bottom end of the first outer cylinder is placed at the bottom of the first conical frustum groove 9, and in order to enable the bearing capacity to be high, the bearing stress to be uniform, the connecting gap is reduced, and the first outer conical frustum 6, the second outer conical frustum 7 and the first outer cylinder 8 are coaxially formed in an integral mode.

As shown in fig. 6, in order to reduce friction force during the flow of molten steel and prevent steel leakage and molten steel splashing, the inner hole of the steel flow center brick is required to be smooth and regular in appearance. When the pipe injection brick is communicated with the variable-diameter transition brick 2 in an extrusion mode, when the outer diameter of the bottom surface of the first outer cone frustum 6 is smaller than the outer diameter of the top surface of the second outer cone frustum 7, the variable-diameter transition brick 2 plays a role in fixedly supporting the pipe injection brick; when the first outer cylinder 8 is connected with the first conical table groove 9 in an extrusion mode, the outer diameter of the first outer cylinder 8 is equal to the outer diameter of the bottom surface of the second outer conical table 7, is smaller than the inner diameter of the bottom of the first conical table groove 9, and the joint gaps are small and compact in connection; the height of the first outer cone frustum 6 is larger than that of the first outer cylinder 8 and smaller than that of the second outer cone frustum 7, so that the variable-diameter transition brick 2 is more stable when being communicated up and down, and is stable in bearing force and difficult to be flushed and poured by molten steel.

Further, the diameter of the central injection hole 11 is enlarged through the reducing transition brick 2, because the inside of the transition original piece between pipelines with different pipe diameters is smooth, the stress distribution is even, but when the injection pipe brick is directly communicated with the cone frustum, the internal joint gap is big and not smooth, and the bearing capacity is not high, so that the installation and the disassembly are not easy. The inside of the reducing transition brick 2 is divided into an inner cylinder 4 and an inner cone table 5 which are communicated in sequence; the bottom surface of the inner cylinder 4 is communicated with the top surface of the inner cone frustum 5, and the bottom surface of the inner cone frustum 5 is communicated with the central injection hole 11 of the flow steel central brick body 1. The inner cylinder 4 can be communicated with the inside of the pipe-injecting brick in a smooth way and is communicated with the inner conical table 5 in a coaxial integrated manner, the structure meets the requirements of smooth inside and even stress distribution of transition elements among pipelines with different pipe diameters, the bearing capacity is higher, and the inner parts are easy to install and detach.

Furthermore, in order to slow down the flushing and splashing of the gravity of the molten steel, the top surface of the central pouring hole 11 does not bear the molten steel, and the molten steel is directly poured into the hole; secondly, the large-caliber surface of the inner cone table 5 is connected with the top surface of the central pouring hole 11, so that the splashing of molten steel can be slowed down; the height design aspect avoids the external connection bearing area, reduces the internal connection turning. Specifically, the inner diameter of the inner cylinder 4 is equal to the inner diameter of the top surface of the inner cone frustum 5 and smaller than the inner diameter of the bottom surface thereof; the inner diameter of the central injection hole 11 of the steel flow central brick body 1 is larger than the inner diameter of the bottom surface of the inner conical table 5; the height of the inner cylinder 4 is larger than that of the inner cone table 5 and smaller than that of the second outer cone table 7; the height of the inner cone frustum 5 is larger than that of the first outer cone frustum 6.

Further, the plurality of the channel holes 3 are uniformly distributed along the circumferential direction of the side wall of the flow steel center brick body 1 and are communicated with the center pouring hole 11. When the plurality of the lane holes 3 are circumferentially and uniformly distributed, the intervals among the lane holes are equal, the stress is also uniform, and steel leakage caused by cracking of the brick walls of the steel flow center brick due to unequal intervals and uneven stress among the lane holes 3 can be avoided.

As shown in fig. 3 and 4, one end of the split hole 3 far away from the central injection hole 11 is provided with a second conical table groove 10 extending outwards; the bottom of the second conical table groove 10 is communicated with the channel dividing hole 3, and the direction of the inner radial channel dividing hole 3 of the second conical table groove 10 gradually contracts; the inner diameter of the bottom of the second conical table groove 10 is larger than the inner diameter of the split hole 3; the second conical table groove 10 and the split hole 3 are coaxially and integrally formed. The molten steel is shunted into the ingot mould through the channel dividing hole 3, so that the impact force of the molten steel is relieved, and the molten steel can be more tightly communicated through the reducing of the second conical table groove 10.

As shown in fig. 1 and 3, the outer wall of the flow steel center brick body 1 is a regular polygon; the number of the lane holes 3 is equal to that of the sides of the regular polygon, and the lane holes are distributed in the middle of each side of the regular polygon. The hollow cylinder on the inner wall of the flow steel center brick has small smooth friction force on the inner wall, high bearing capacity and even stress when bearing molten steel, and because the flow steel center brick needs to be correctly and stably arranged on the bottom plate, the outside is more easy to fixedly mount and dismount by adopting a regular polygon, and secondly, the distribution of the split holes 3 is easy, so that the bearing capacity and the stress distribution of each split hole 3 are even.

In order to further and effectively explain the feasibility of the utility model, a person skilled in the art can quickly grasp the structure, the installation and the use of the utility model according to the structural characteristics of the utility model, and the utility model provides an embodiment of the composite structural flow steel center brick. The following are provided:

the height of the steel flow center brick body 1 is 115mm-123mm, preferably 115mm; the bottom wall thickness is 35mm-37mm, preferably 35mm; the aperture of the central injection hole 11 is 150mm-200mm, preferably 150mm; the aperture of the notch of the first conical table groove 9 is 188mm-193mm, preferably 190mm; the aperture of the groove bottom is 186mm-191mm, preferably 188mm; the height is 15mm-17mm, preferably 15mm.

The inner diameter of the split hole 3 is 50mm-52mm, preferably 50mm; the inner diameter of the large mouth of the second outer cone frustum 7 is 79mm-84mm, preferably 81mm; the inner diameter of the groove bottom is 74mm-78mm, preferably 76mm; the height is 8mm-12mm, preferably 10mm; the distance between the first conical table groove 9 and the split hole 3 is 15mm-17mm, preferably 15mm.

The height of the reducing transition brick 2 is 55mm-70mm, preferably 60mm; the wall thickness is 60mm-71mm; the outer diameter of the top of the outer first outer cone frustum 6 is 123mm-128mm, preferably 125mm; the outer diameter of the bottom is 123mm-132mm, preferably 130mm; the height is 10mm-16mm, preferably 13mm; the outer diameter of the top of the second outer cone frustum 7 is 158mm-163mm, preferably 160mm; the outer diameter of the bottom is 184mm-189mm, preferably 186mm; the height is 35mm-40mm, preferably 37mm; the first outer cylinder 8 has a height of 10mm-14mm, preferably 10mm; the inner diameter of the inner cylinder 4 is 95mm-103mm, preferably 100mm; the height is 32mm-40mm, preferably 35mm; the outer diameter of the bottom of the inner cone frustum 5 is 118mm-122mm, preferably 115mm; the height is 23mm-30mm, preferably 25mm.

When the composite structure flow steel center brick is used for pouring steel ingots, when molten steel enters the composite structure flow steel center brick, the molten steel firstly flows into the variable diameter transition brick 2, the impact of the molten steel in the flow steel center brick body 1 can be reduced through the buffer of the variable diameter transition brick 2, the molten steel passes through the central pouring hole 11 with the increased aperture, and then flows into each direct current runner brick through the plurality of channel dividing holes 3, and finally flows into each steel ingot.

It will be appreciated by those skilled in the art that the present utility model can be carried out in other embodiments without departing from the spirit or essential characteristics thereof. Accordingly, the above disclosed embodiments are illustrative in all respects, and not exclusive. All changes that come within the scope of the utility model or equivalents thereto are intended to be embraced therein.

Claims (10)

1. The utility model provides a composite construction flows steel center brick, its characterized in that, flow steel center brick and annotate the tube brick intercommunication, flow steel center brick includes:

the steel flow center brick comprises a steel flow center brick body (1), wherein a center injection hole (11) is formed in the axial direction of the steel flow center brick body (1), and a channel separation hole (3) is formed in the side wall of the steel flow center brick body (1);

the variable-diameter transition brick (2), a transition hole is formed in the axial direction of the variable-diameter transition brick (2), the outer wall of the variable-diameter transition brick (2) is divided into a first outer cone table (6), a second outer cone table (7) and a first outer cylinder (8) which are sequentially connected from top to bottom, and the inside of the variable-diameter transition brick (2) is divided into an inner cylinder (4) and an inner cone table (5) which are sequentially communicated;

the lower end hole diameter of the transition hole is larger than the inner diameter of the pouring tube brick and smaller than the inner diameter of the central pouring hole (11);

the pipe pouring brick, the reducing transition brick (2) and the steel flow center brick body (1) are sequentially communicated from top to bottom.

2. The composite structural flow steel center block of claim 1, wherein:

the top surface of the steel flow center brick body (1) is provided with a first conical table groove (9) which is communicated with the center injection hole (11) and gradually contracts towards the direction of the center injection hole (11);

the first conical table groove (9) is coaxial with the central injection hole (11), and the bottom aperture of the first conical table groove (9) is larger than the inner diameter of the central injection hole (11);

the bottom of the first conical bench groove (9) is distant from the channel dividing hole (3).

3. The composite structural flow steel center block of claim 2, wherein:

the reducing transition brick (2) is in an inverted horn mouth shape, and the reducing transition brick (2) is embedded into the first conical table groove (9).

4. The composite structural flow steel center block of claim 2, wherein:

the first outer cone frustum (6), the second outer cone frustum (7) and the first outer cylinder (8) are sequentially connected from top to bottom,

the top surface of the first outer cone frustum (6) is connected with the pipe pouring brick, and the first outer cylinder (8) is embedded into the first cone frustum groove (9);

the first outer cone frustum (6), the second outer cone frustum (7) and the first outer cylinder (8) are coaxial and integrally formed.

5. The composite structural flow steel center block of claim 4, wherein:

the outer diameter of the bottom surface of the first outer cone frustum (6) is smaller than the outer diameter of the top surface of the second outer cone frustum (7);

the outer diameter of the first outer cylinder (8) is equal to the outer diameter of the bottom surface of the second outer cone frustum (7) and is smaller than the bottom aperture of the first conical frustum groove (9);

the height of the first outer cone frustum (6) is larger than that of the first outer cylinder (8) and smaller than that of the second outer cone frustum (7).

6. The composite structural flow steel center block of claim 5, wherein:

the inner cylinder (4) and the inner cone table (5) are coaxial and are communicated sequentially from top to bottom,

the top surface of the inner cylinder (4) is communicated with the pouring pipe brick, and the bottom surface of the inner conical table (5) is communicated with a central pouring hole (11) of the flow steel central brick body (1).

7. The composite structural flow steel center block of claim 6, wherein:

the inner diameter of the inner cylinder (4) is equal to the inner diameter of the top surface of the inner cone table (5) and is smaller than the inner diameter of the bottom surface of the inner cone table (5);

the inner diameter of a central injection hole (11) of the steel flow central brick body (1) is larger than the inner diameter of the bottom surface of the inner cone frustum (5);

the height of the inner cylinder (4) is larger than that of the inner cone frustum (5) and smaller than that of the second outer cone frustum (7),

the height of the inner cone table (5) is larger than that of the first outer cone table (6).

8. The composite structural flow steel center block of claim 1, wherein:

the number of the channel dividing holes (3) is multiple, the channel dividing holes are uniformly distributed along the circumferential direction of the flow steel center brick body (1), and the channel dividing holes are communicated with the center injection hole (11).

9. The composite structural flow steel center block of claim 1, wherein:

one end of the channel dividing hole (3) far away from the central injection hole (11) is provided with a second conical table groove (10) extending outwards,

the bottom of the second conical table groove (10) is communicated with the channel dividing hole (3), and the hole of the second conical table groove (10) gradually contracts in the radial direction of the channel dividing hole (3);

the aperture of the bottom of the second conical table groove (10) is larger than the inner diameter of the lane hole (3);

the second conical table groove (10) and the split hole (3) are coaxial and integrally formed.

10. A steel center brick according to any one of claims 1-9, wherein:

the outer wall of the flow steel center brick body (1) is regular polygon;

the number of the lane holes (3) is equal to that of the edges of the regular polygon, and the lane holes are distributed in the middle of each side edge of the regular polygon.

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