Coal pipe capable of adjusting coal injection quantity

Abstract

The invention relates to the technical field of coal injection ducts, and discloses a coal duct capable of adjusting the coal injection amount. The coal pipe capable of adjusting the coal injection quantity comprises a coal pipe body, an inner-layer pipe is arranged in the coal pipe body in a sleeved mode, a center auxiliary rod is installed in the center of the interior of the inner-layer pipe, a shrinkage lantern ring is installed on the outer side of the coal pipe body in an embedded mode, a connecting strip is movably connected to one side of the shrinkage lantern ring, and a telescopic air cylinder is rotationally connected to the right side of the shrinkage lantern ring; a volute is mounted at the inlet end of the coal pipe; the inlet end of the coal pipe is connected with the volute, the impeller is driven to rotate through the volute structure and the impeller structure in the volute, the impeller driving motor drives the impeller to rotate, the rotating speed of the impeller is beneficial to control and adjustment of the inlet flow speed and flow of pulverized coal, the circulation of the pulverized coal is increased through the volute, drainage and guiding can be achieved, and meanwhile the flow rate of the pulverized coal is increased. And the flow balance of the pulverized coal is stabilized, so that the passing amount of the pulverized coal in the coal pipe is controlled in cooperation with the shrinkage lantern ring, and the coal injection amount of the coal pipe is adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of coal injection pipes, in particular to a coal pipe for adjusting the amount of coal injection. Background Art

[0002] During the normal smelting process of the blast furnace, the pulverized coal enters the pulverized coal injection main pipe through the pulverized coal injection tank and is sprayed into the blast furnace through the distributor. During this process, the temperature, humidity, fluidization degree and pressure fluctuation of the pulverized coal in the pulverized coal injection tank will cause fluctuations in the instantaneous coal injection amount to varying degrees. However, the fluidization degree plays a decisive role in destroying the static adsorption force between the pulverized coal particles. The pulverized coal injection pipe is a key equipment for cement clinker calcination.

[0003] In the existing publication number CN2076553U, a flow regulating device for blast furnace coal injection is disclosed, which uses a distribution plate composed of multiple one-way check fluidizing nozzles to replace the conventional porous distribution plate, and adopts a series regulating system of fluidizing gas flow composed of a fluidizing gas slide valve port and a needle regulating valve. This regulating device not only eliminates the possibility of the distribution plate being blocked or the powder backflowing into the fluidizing gas chamber, but also reduces the premature wear of the regulating opening. Therefore, the powder flow can be regulated stably, continuously, and online, and the control and regulation of the coal injection flow is achieved through the control of the regulating system and the valve assembly. The coordination of the system and the valve, after long-term use, the system and the valve may experience valve operation out of control and operation delay, and the lack of a mechanical regulating structure to assist in the coordinated control and regulation leads to a decrease in the control effect of the coal powder flow.

[0004] The current coal pipe is not conducive to controlling and adjusting the amount of coal powder passing through the coal pipe during use. Since it is not conducive to adjusting the amount of coal powder passing through, the coal injection amount at the output end of the coal pipe is not easy to control, resulting in uneven distribution of coal powder during blast furnace smelting, causing problems with the quality of cement clinker calcination. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a coal pipe for adjusting the coal injection amount, which can solve the problem of regulating the amount of coal powder passing through the coal pipe and controlling the amount of coal powder sprayed.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose of regulating the amount of coal powder passing through the coal pipe and controlling the amount of coal powder ejected, the present invention provides the following technical solution: comprising a coal pipe, an inner layer pipe is sleeved inside the coal pipe, and a central auxiliary rod is installed at the inner center of the inner layer pipe, a shrinking ring is embedded and installed on the outer side of the coal pipe, and a connecting strip is movably connected to one side of the shrinking ring, and a telescopic cylinder is rotatably connected to the right side of the shrinking ring, a volute is installed at the inlet end of the coal pipe, and a connecting port is connected to one end of the volute, and a coal inlet is installed at the other end of the volute, an impeller driving motor for driving an internal impeller is connected to one side of the volute, an impeller seat is installed inside the volute, and impeller blades are provided on the surface of the impeller seat, and a driving shaft is fixedly connected to the center of the impeller seat.

[0009] As an embodiment of the present invention, the volute is connected to the inlet end of the coal pipe through the connection port, and the interior of the volute is connected to the interior of the coal pipe through the connection port.

[0010] As an embodiment of the present invention, a sliding groove is arranged on the surface of the connecting strip, and both ends of the connecting strip are movably connected to the shrinking ring.

[0011] As an embodiment of the present invention, the shrink sleeve is slidably connected to the connecting strip via a sliding groove, and the left side of the shrink sleeve is arranged as an open end.

[0012] As an embodiment of the present invention, the center line of the inner layer pipe coincides with the center line of the coal pipe and the center line of the central auxiliary rod, and a soft bag tube is provided on the surface of the inner layer pipe.

[0013] As an embodiment of the present invention, the inner tube and the soft bag tube are integrally connected, and the setting position of the soft bag tube corresponds to the setting position of the shrink ring.

[0014] As an embodiment of the present invention, a conical sleeve is installed on the surface of the central auxiliary rod, and an airbag is installed inside the conical sleeve. An inflatable ball is arranged in the middle of the airbag, and one end of the airbag is connected to an inflator through an air pipe.

[0015] As an embodiment of the present invention, the interior of the inflatable ball is communicated with the interior of the airbag.

[0016] As an implementation mode of the present invention, a pipe sleeve is provided at one end of the coal pipe connected to the connecting port, and an elastic sealing plug is installed inside the pipe sleeve.

[0017] As an embodiment of the present invention, a push cylinder is fixedly connected to the outlet end of the connection port, and a vent hole is fixedly opened on the surface of the push cylinder.

[0018] Compared with the prior art, the present invention provides a coal pipe for adjusting the coal injection amount, which has the following beneficial effects:

[0019] 1. An inner tube is sleeved inside the coal pipe, and a shrinking ring is sleeved on the outer movable sleeve of the coal pipe. The inner tube can improve the sealing between the inside of the coal pipe and the shrinking ring, and prevent coal powder from leaking from the installation position of the shrinking ring. A soft bag tube is arranged at the overlapping position of the inner tube and the shrinking ring. In this way, when the size of the shrinking ring is adjusted by shrinking, the soft bag tube will be squeezed, thereby reducing the passable diameter of the soft bag tube, thereby reducing the contact space area of ​​the coal powder inside the coal pipe and reducing the amount of coal powder passing through.

[0020] 2. The left side of the shrinking sleeve is a rotatable structure, and the right side of the shrinking sleeve is set as an open structure, which is connected by a connecting strip. The open end of the shrinking sleeve and the connecting strip are slidably connected. The opening size of the shrinking sleeve can be controlled by the extension and contraction of the telescopic cylinder. The smaller the opening, the more the shrinking sleeve squeezes into the coal pipe. Conversely, the larger the opening, the more the shrinking sleeve expands to the outside of the coal pipe. The shrinkage size of the opening will control and adjust the diameter of the soft bag tube, thereby adjusting the amount of coal powder passing through the coal pipe.

[0021] 3. A volute is connected to the inlet end of the coal pipe. The impeller driving motor drives the impeller to rotate by utilizing the volute structure and the impeller structure inside the volute. The speed of the impeller is conducive to controlling and adjusting the inlet flow rate and flow rate of the coal powder. The volute can increase the circulation volume of the coal powder, realize drainage and guidance, and stabilize the flow balance of the coal powder, thereby cooperating with the shrinkage ring to control the amount of coal powder passing through the coal pipe, and then adjust the coal injection amount of the coal pipe.

[0022] 4. The conical sleeve is installed in the middle of the coal pipe through the central auxiliary rod. An airbag and an inflator are arranged inside the conical sleeve. The inflator and the airbag are connected to each other. The inflator is connected to the airbag through a pipeline to facilitate the inflator to inflate the inside of the airbag, and one end of the airbag is connected to one end of the inflatable ball, so that the inside of the airbag and the inflatable ball are connected to each other. The inflator inflates the airbag and utilizes the connecting structure between the airbag and the inflatable ball to inflate the inside of the inflatable ball. As the inflatable ball continues to expand, the inflatable ball will bulge out from the middle opening of the conical sleeve from the middle of the conical sleeve. The bulging inflatable ball will reduce the diameter space inside the coal pipe, and then adjust the space inside the coal pipe. When the space is reduced, the amount of coal powder passing through is reduced. Conversely, when the space inside the coal pipe is restored, the coal powder passes through at a normal amount. In this way, the amount of coal powder passing through can be further limited by limiting the diameter space inside the coal pipe. At the same time, it can also be intercepted in time after the input amount of coal powder is excessive to avoid excessive coal injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of the coal pipe in the present invention;

[0025] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 4 It is a schematic diagram of the volute structure in the present invention;

[0027] Figure 5 It is a schematic diagram of the installation structure between the coal pipe and the shrink sleeve in the present invention;

[0028] Figure 6 This is a schematic diagram of the internal cross-sectional structure of the coal pipe in the present invention;

[0029] Figure 7 It is a schematic diagram of the internal cross-sectional structure of the tapered sleeve in the present invention;

[0030] Figure 8 It is a schematic diagram of the connection structure between the airbag and the inflatable ball in the present invention;

[0031] Fig. 9 It is a schematic diagram of the structure of the impeller blade in the present invention;

[0032] Fig.10 It is a schematic diagram of the connection structure between the coal pipe and the connection port in the present invention;

[0033] Fig.11 It is a schematic diagram of the cross-sectional structure of the coal pipe and the connecting port in the present invention.

[0034] Among them: 1. coal pipe; 2. inner pipe; 3. central auxiliary rod; 4. volute; 5. connection port; 6. coal inlet; 7. shrinkage ring; 701. connection strip; 702. slide groove; 703. telescopic cylinder; 704. side ear; 705. connecting shaft; 8. conical sleeve; 9. air bag; 10. inflatable ball; 11. inflator; 12. impeller drive motor; 13. soft bag tube; 14. impeller seat; 15. drive shaft; 16. impeller blade; 17. pipe sleeve; 18. elastic sealing plug; 19. push cylinder; 20. vent. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1-11 A coal pipe for adjusting the amount of coal injection, comprising a coal pipe 1, an inner layer pipe 2 is sleeved inside the coal pipe 1, a central auxiliary rod 3 is installed at the inner center of the inner layer pipe 2, a conical sleeve 8 is installed on the surface of the central auxiliary rod 3, an air bag 9 is installed inside the conical sleeve 8, an inflatable ball 10 is arranged in the middle of the air bag 9, one end of the air bag 9 is connected to an inflator 11 through an air pipe, and the interior of the inflatable ball 10 is connected to the interior of the air bag 9;

[0037] Specifically, a central auxiliary rod 3 is arranged at the inner center of the coal pipe 1, and the central auxiliary rod 3 is connected to the conical sleeve 8, and an open structure is arranged in the middle of the conical sleeve 8. During the inflation process, the air bag 9 and the inflatable ball 10 arranged inside the conical sleeve 8 make the inflatable ball 10 bulge out from the open structure in the middle of the conical sleeve 8, thereby adjusting and sealing the space inside the coal pipe 1. In this way, the passage space of coal powder inside the coal pipe 1 is controlled and the passage amount of coal powder is limited. Secondly, the interior of the coal pipe 1 is timely sealed, and when the input amount of coal powder is large, it is intercepted in time to avoid excessive coal injection.

[0038] A shrinking collar 7 is fitted and installed on the outer side of the coal pipe 1, and a connecting strip 701 is movably connected to one side of the shrinking collar 7, and a telescopic cylinder 703 is rotatably connected to the right side of the shrinking collar 7. A sliding groove 702 is arranged on the surface of the connecting strip 701, and both ends of the connecting strip 701 are movably connected to the shrinking collar 7. The shrinking collar 7 is slidably connected to the connecting strip 701 through the sliding groove 702, and the left side of the shrinking collar 7 is arranged as an open end;

[0039] Specifically, the left side of the shrinking ring 7 is set as an open structure, and is movably connected with the connecting strip 701. The opening size of the opening end of the shrinking ring 7 is adjusted by the extension and contraction of the telescopic cylinder 703, and is adjusted in conjunction with the slide groove 702 set on the connecting strip 701. As the shrinking ring 7 is adjusted, the passing diameter of the coal powder inside the coal pipe 1 is limited, thereby limiting the passing amount of the coal powder.

[0040] A volute 4 is installed at the inlet end of the coal pipe 1, and one end of the volute 4 is connected to a connection port 5, and the other end of the volute 4 is installed with a coal inlet 6. One side of the volute 4 is connected to an impeller driving motor 12 for driving an internal impeller, an impeller seat 14 is installed inside the volute 4, and an impeller blade 16 is provided on the surface of the impeller seat 14, and a driving shaft 15 is fixedly connected to the center of the impeller seat 14. The volute 4 is connected to the inlet end of the coal pipe 1 through the connection port 5, and the interior of the volute 4 is connected to the interior of the coal pipe 1 through the connection port 5.

[0041] Specifically, a volute 4 is provided at the inlet end of the coal pipe 1, and the rotation speed of the impeller inside the volute 4 is used to control the amount of coal powder entering, thereby controlling the amount of coal powder passing through the coal pipe 1, thereby facilitating the adjustment of the coal injection amount of the coal pipe 1. An impeller seat 14 is rotatably connected inside the volute 4, and the impeller seat 14 is interconnected with the impeller drive motor 12 through a driving shaft 15. The impeller drive motor 12 is used to drive the impeller seat 14 to rotate. Impeller blades 16 are provided on the surface of the impeller seat 14. The impeller blades 16 adopt a curved structure, so that the flow of coal powder between the impeller blades 16 is smoother and the fluidity is better, which facilitates the flow of coal powder through.

[0042] The center line of the inner tube 2 coincides with the center line of the coal tube 1 and the center line of the central auxiliary rod 3, and a soft bag tube 13 is arranged on the surface of the inner tube 2. The inner tube 2 and the soft bag tube 13 are integrally connected, and the setting position of the soft bag tube 13 corresponds to the setting position of the shrink ring 7;

[0043] Specifically, an inner tube 2 is added inside the coal pipe 1, and the inner tube 2 is used to increase the sealing property inside the coal pipe 1 to prevent leakage of the coal pipe 1 when coal powder passes through and coal is sprayed, and a soft bag tube 13 is provided at the corresponding setting position of the inner tube 2 and the shrinkage ring 7, and the ductility of the soft bag tube 13 is utilized to cooperate with the shrinkage of the shrinkage ring 7 to perform shrinkage adjustment, thereby reducing the space inside the coal pipe 1 and limiting the amount of coal powder passing through.

[0044] A pipe sleeve 17 is provided at one end of the coal pipe 1 connected to the connection port 5, and an elastic sealing plug 18 is installed inside the pipe sleeve 17. A push tube 19 is fixedly connected to the outlet end of the connection port 5, and a vent hole 20 is fixedly opened on the surface of the push tube 19.

[0045] Specifically, an elastic sealing plug 18 is arranged inside the pipe sleeve 17, and the elastic sealing plug 18 is used to temporarily seal one end of the coal pipe 1. One end of the coal pipe 1 is connected to the volute 4 through the connecting port 5. When the connecting port 5 is connected to the coal pipe 1, the elastic sealing plug 18 is pushed deep into the interior of the coal pipe 1 by the push cylinder 19 inside the connecting port 5, so that the pipe mouth of the coal pipe 1 is opened, and the air vent 20 on the surface of the push cylinder 19 is used to connect the interior of the volute 4 with the interior of the coal pipe 1.

[0046] When in use, first, the volute 4 is connected to the inlet end of the coal pipe 1 through the connecting port 5, and the push cylinder 19 on the connecting port 5 is pushed into the coal pipe 1. The push cylinder 19 will push the elastic sealing plug 18 to move deep into the coal pipe 1, so that the elastic sealing plug 18 retreats, and then the pipe mouth of the coal pipe 1 is opened, and the push cylinder 19 on the connecting port 5 also enters the interior of the coal pipe 1. A vent hole 20 is provided on the surface of the push cylinder 19. After the push cylinder 19 enters the interior of the coal pipe 1, the vent hole 20 makes the interior of the coal pipe 1 and the interior of the volute 4 communicate with each other. The coal enters the volute 4 through the coal inlet 6 at one end of the volute 4, and the impeller driving motor 12 drives the impeller structure inside the volute 4 to rotate. The impeller seat 14 is connected to the impeller driving motor 12 through the driving shaft 15. The impeller driving motor 12 is used to drive the impeller seat 14 to rotate. The surface of the impeller seat 14 is provided with an impeller blade 16. Under the drive of the impeller driving motor 12, the speed of the impeller blade 16 is conducive to controlling and adjusting the inlet flow rate and flow rate of the coal powder. When the impeller blade 16 rotates faster, the coal powder will pass through the volute 4 faster, and the coal powder will increase in flow rate. When the impeller blade 16 rotates slowly, the input flow rate of the coal powder decreases, and the input volume also decreases. Secondly, when the coal powder enters the interior of the coal pipe 1 through the vent hole 20 on the surface of the push cylinder 19 on the connection port 5 at one end of the volute 4, the opening size of the opening end of the shrinking sleeve 7 is adjusted by using the expansion and contraction of the telescopic cylinder 703 and the sliding connection structure between the shrinking sleeve 7 and the connecting strip 701. The smaller the opening, the more the shrinking sleeve 7 is squeezed into the interior of the coal pipe 1. As the shrinking adjustment of the shrinking sleeve 7 is made, the shrinking sleeve 7 will squeeze the coal pipe 1. The soft bag tube 13 at the corresponding position on the surface of the inner tube 2 reduces the passable diameter of the soft bag tube 13, so that the amount of coal powder passing through the coal pipe 1 is reduced, thereby controlling the coal injection amount of the coal pipe 1; and secondly, the inflator 11 inflates the interior of the airbag 9, and the airbag 9 is interconnected with the interior of the inflatable ball 10, so that the interior of the inflatable ball 10 is inflated and expanded, and bulges out from the middle of the conical sleeve 8, so as to adjust the space inside the coal pipe 1, further limit the amount of coal powder passing through, and intercept in time when the input amount of coal powder is excessive, so as to avoid excessive coal injection.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal pipe for adjusting the amount of coal injection, comprising a coal pipe (1), characterized in that: The coal pipe (1) is sleeved with an inner layer pipe (2), and a central auxiliary rod (3) is installed at the inner center of the inner layer pipe (2). A shrinking collar (7) is embedded and installed on the outer side of the coal pipe (1), and a connecting strip (701) is movably connected to one side of the shrinking collar (7), and a telescopic cylinder (703) is rotatably connected to the right side of the shrinking collar (7). A volute (4) is installed at the inlet end of the coal pipe (1), and a connecting port (5) is connected to one end of the volute (4), and a coal inlet (6) is installed at the other end of the volute (4). An impeller driving motor (12) for driving an internal impeller is connected to one side of the volute (4). An impeller seat (14) is installed inside the volute (4), and impeller blades (16) are arranged on the surface of the impeller seat (14). A driving shaft (15) is fixedly connected to the center of the impeller seat (14).

2. A coal pipe for adjusting the coal injection amount according to claim 1, characterized in that: The volute (4) is connected to the inlet end of the coal pipe (1) via the connection port (5), and the interior of the volute (4) is connected to the interior of the coal pipe (1) via the connection port (5).

3. A coal pipe for adjusting coal injection amount according to claim 1, characterized in that: A sliding groove (702) is provided on the surface of the connecting strip (701), and both ends of the connecting strip (701) are movably connected to the shrinking ring (7).

4. A coal pipe for adjusting coal injection amount according to claim 1, characterized in that: The shrinking collar (7) is slidably connected to the connecting strip (701) via the sliding groove (702), and the left side of the shrinking collar (7) is arranged as an open end.

5. The coal pipe for adjusting the coal injection amount according to claim 1, characterized in that: The center line of the inner layer pipe (2) coincides with the center line of the coal pipe (1) and the center line of the central auxiliary rod (3), and a soft bag tube (13) is arranged on the surface of the inner layer pipe (2).

6. The coal pipe for adjusting the coal injection amount according to claim 1, characterized in that: The inner layer tube (2) and the soft bag tube (13) are connected in an integrated manner, and the setting position of the soft bag tube (13) corresponds to the setting position of the shrink sleeve (7).

7. The coal pipe for adjusting the coal injection amount according to claim 1, characterized in that: A conical sleeve (8) is installed on the surface of the central auxiliary rod (3), and an air bag (9) is installed inside the conical sleeve (8). An inflatable ball (10) is arranged in the middle of the air bag (9), and one end of the air bag (9) is connected to an inflator (11) through an air pipe.

8. The coal pipe for adjusting the coal injection amount according to claim 7, characterized in that: The interior of the inflatable ball (10) is communicated with the interior of the airbag (9).

9. The coal pipe for adjusting the coal injection amount according to claim 1, characterized in that: A pipe sleeve (17) is provided at one end of the coal pipe (1) connected to the connection port (5), and an elastic sealing plug (18) is installed inside the pipe sleeve (17).

10. The coal pipe for adjusting the coal injection amount according to claim 1, characterized in that: The outlet end of the connection port (5) is fixedly connected to a push tube (19), and a vent hole (20) is fixedly opened on the surface of the push tube (19).

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