A coal pipe for adjusting coal injection amount

Abstract

The present invention relates to the technical field of coal injection pipes, and discloses a coal pipe for adjusting the amount of coal injection. The coal pipe for adjusting the amount of coal injection comprises a coal pipe, wherein an inner layer pipe is sleeved inside the coal pipe, and a central auxiliary rod is installed at the center of the inner layer pipe, a shrinking collar is embedded and installed on the outside of the coal pipe, and a connecting strip is movably connected to one side of the shrinking collar, and a telescopic cylinder is rotatably connected to the right side of the shrinking collar, and a volute is installed at the inlet end of the coal pipe; the volute is connected to the inlet end of the coal pipe, and an impeller structure inside the volute is used to drive the impeller to rotate by an impeller driving motor, and the speed of the impeller is conducive to controlling and adjusting the inlet flow rate and flow of coal powder, and the volute is used to increase the circulation amount of coal powder, thereby achieving drainage and guiding, and stabilizing the flow balance of coal powder, thereby cooperating with the shrinking collar to control the amount of coal powder passing through the coal pipe, thereby adjusting the amount of coal injection of the coal pipe.

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, pulverized coal enters the coal injection main pipe through the 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 coal powder and the 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 coal powder particles. The coal injection pipe is a key equipment for cement clinker calcination.

[0003] Existing publication number CN2076553U discloses a flow control device for blast furnace coal injection. This device replaces the conventional porous distribution plate with a distribution plate composed of multiple one-way check fluidizing nozzles. It also employs a series-connected fluidizing gas flow control system consisting of a fluidizing gas slide valve port and a needle-type regulating valve. This control device eliminates the possibility of the distribution plate becoming clogged or powder backflowing into the fluidizing gas chamber, while also reducing premature wear of the regulating opening. Consequently, the powder flow can be regulated stably, continuously, and online. Control of the coal injection flow is achieved through the control of the regulating system and valve assembly. However, the coordination of the system and valves can lead to valve operation loss and operational delays after prolonged use. The lack of a mechanical regulating structure to assist in coordinated control and regulation results in reduced control of the coal powder flow.

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

[0005] (1) Technical problems solved

[0006] In view of the shortcomings of the existing technology, 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] (2) 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: it includes a coal pipe, an inner layer pipe is provided inside the coal pipe, and a central auxiliary rod is installed at the inner center of the inner layer pipe, a shrinkage collar is embedded and installed on the outer side of the coal pipe, and a connecting strip is movably connected to one side of the shrinkage collar, and a telescopic cylinder is rotatably connected to the right side of the shrinkage collar, a volute is installed at the inlet end of the coal pipe, and one end of the volute is connected to a connecting port, and the other end of the volute is installed at a coal inlet, one side of the volute is connected to an impeller drive motor for driving an internal impeller, an impeller seat is installed inside the volute, and impeller blades are provided on the surface of the impeller seat, and the center of the impeller seat is fixedly connected to a drive shaft.

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

[0010] As an embodiment of the present invention, a sliding groove is provided 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 shrinking collar is slidably connected to the connecting strip via a sliding groove, and the left side of the shrinking collar is set 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 provided 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 embodiment 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, the outlet end of the connection port is fixedly connected to a push cylinder, 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 sheathed inside the coal pipe, and a shrinkage ring is movably sheathed outside the coal pipe. The inner tube can improve the sealing between the inside of the coal pipe and the shrinkage ring, and prevent coal powder from leaking from the installation position of the shrinkage ring. A soft bag tube is provided at the overlapping position of the inner tube and the shrinkage ring. In this way, when the size of the shrinkage ring is adjusted by shrinkage, 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 to an open structure, which is connected by a connecting strip. The open end of the shrinking sleeve and the connecting strip are slidingly connected. The opening size of the shrinking sleeve can be controlled by the expansion and contraction of the telescopic cylinder. The smaller the opening, the more the shrinking sleeve is squeezed 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 volute structure and the impeller structure inside the volute are used to drive the impeller to rotate. The speed of the impeller is conducive to controlling and adjusting the inlet flow rate and flow of the coal powder. The volute is used to increase the circulation volume of the coal powder, achieve drainage and guidance, and stabilize the flow balance of the coal powder. In conjunction with the shrinkage ring, the amount of coal powder passing through the coal pipe is controlled, and the coal injection amount of the coal pipe is adjusted.

[0022] 4. The conical sleeve is installed in the middle of the coal pipe through the central auxiliary rod. An air bag and an inflator are provided inside the conical sleeve. The inflator and the air bag are connected to each other. The inflator is connected to the air bag through a pipe, so that the inflator can inflate the inside of the air bag. One end of the air bag is connected to one end of the inflatable ball, so that the inside of the air bag and the inflatable ball are connected to each other. The inflator inflates the air bag and utilizes the communication structure between the air bag 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. The bulging inflatable ball will reduce the diameter space inside the coal pipe, thereby adjusting 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 when 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 Schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 4 Schematic diagram of the volute structure in the present invention;

[0027] Figure 5 This is a schematic diagram of the installation structure between the coal pipe and the shrinkage collar 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 Schematic diagram of the internal cross-sectional structure of the tapered sleeve in the present invention;

[0030] Figure 8 Schematic diagram of the connection structure between the airbag and the inflatable ball in the present invention;

[0031] Figure 9 Schematic diagram of the structure of the impeller blade in the present invention;

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

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

[0034] Among them: 1. Coal pipe; 2. Inner pipe; 3. Center auxiliary rod; 4. Volute; 5. Connecting port; 6. Coal inlet; 7. Shrinkage ring; 701. Connecting strip; 702. Slide; 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 provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall 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 includes a coal pipe 1, an inner layer pipe 2 is sheathed inside the coal pipe 1, and a central auxiliary rod 3 is installed at the center of the inner layer pipe 2. 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 provided 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. 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 provided 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 provided in the middle of the conical sleeve 8. During the inflation process, the air bag 9 and the inflatable ball 10 provided 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 the coal powder inside the coal pipe 1 is controlled and the passage amount of the coal powder is limited. Secondly, the interior of the coal pipe 1 is sealed in time, and when the input amount of the coal powder is large, it is intercepted in time to avoid excessive coal injection.

[0038] A shrinking collar 7 is fitted on the outside of the coal pipe 1, and a connecting strip 701 is movably connected to one side of the shrinking collar 7. A telescopic cylinder 703 is rotatably connected to the right side of the shrinking collar 7. 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 collar 7. 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 set as an open end.

[0039] Specifically, the left side of the shrinking collar 7 is set to an open structure, and is movably connected to the connecting strip 701. The opening size of the opening end of the shrinking collar 7 is adjusted by the expansion 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 collar 7 is contracted and adjusted, the passing diameter of the coal powder inside the coal pipe 1 will be limited, thereby limiting the passing amount of the coal powder.

[0040] A volute 4 is mounted at the inlet end of the coal pipe 1, with a connection port 5 connected to one end of the volute 4 and a coal inlet 6 mounted at the other end. An impeller drive motor 12 for driving an internal impeller is connected to one side of the volute 4. An impeller seat 14 is mounted inside the volute 4, and impeller blades 16 are provided on the surface of the impeller seat 14. A drive 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 via the connection port 5, and the interior of the volute 4 is in communication with the interior of the coal pipe 1 via 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, and then the amount of coal powder passing through the coal pipe 1 is controlled, which is conducive to adjusting the coal injection amount of the coal pipe 1. The volute 4 is rotatably connected to an impeller seat 14, and the impeller seat 14 is connected to the impeller drive motor 12 through a drive shaft 15. The impeller drive motor 12 is used to drive the impeller seat 14 to rotate. The surface of the impeller seat 14 is provided with impeller blades 16. 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 centerline of the inner tube 2 coincides with the centerline of the coal tube 1 and the centerline of the central auxiliary rod 3, and a soft bag tube 13 is provided 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 of the inside of the coal pipe 1 to prevent the coal pipe 1 from leaking when the coal powder passes through and the coal is sprayed. In addition, a soft bag tube 13 is provided at the corresponding setting position of the inner tube 2 and the shrinkage ring 7. The ductility of the soft bag tube 13 is utilized to cooperate with the shrinkage of the shrinkage ring 7 for shrinkage adjustment, thereby reducing the space inside the coal pipe 1 and limiting the amount of coal powder passing through.

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

[0045] Specifically, an elastic sealing plug 18 is provided inside the pipe sleeve 17. The elastic sealing plug 18 temporarily seals 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 and the coal pipe 1 are connected, the push cylinder 19 inside the connecting port 5 is used to push the elastic sealing plug 18 deep into the interior of the coal pipe 1, so that the pipe mouth of the coal pipe 1 is opened, and the vent hole 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 interior of the coal pipe 1. The push cylinder 19 will push the elastic sealing plug 18 to move deep into the interior of the coal pipe 1, so that the elastic sealing plug 18 retreats, and then the pipe mouth of the coal pipe 1 is opened. 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 interior of the volute 4 through the coal inlet 6 at one end of the volute 4, and the impeller drive motor 12 drives the impeller structure inside the volute 4 to rotate. The impeller seat 14 is connected to the impeller drive motor 12 through the drive shaft 15. The impeller drive 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 drive motor 12, the speed of the impeller blade 16 is conducive to controlling and adjusting the inlet flow rate and flow 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. As the air flow increases, the input volume also increases. Conversely, when the impeller blades 16 rotate 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 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 shrinkage sleeve 7 is adjusted by the expansion and contraction of the telescopic cylinder 703 and the sliding connection structure between the shrinkage sleeve 7 and the connecting strip 701. The smaller the opening, the more the shrinkage sleeve 7 is squeezed into the interior of the coal pipe 1. As the shrinkage of the shrinkage sleeve 7 is adjusted, the shrinkage 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 amount of coal sprayed from the coal pipe 1. 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, adjusting the space inside the coal pipe 1, further limiting the amount of coal powder passing through, and intercepting it in time when the input amount of coal powder is excessive to avoid excessive coal spraying.

[0047] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the 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 ring (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 ring (7), and a telescopic cylinder (703) is rotatably connected to the right side of the shrinking ring (7). 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 connecting 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 center line of the inner tube (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 provided 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). 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 provided 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.

2. A coal pipe for adjusting 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 connecting port (5), and the interior of the volute (4) is communicated with the interior of the coal pipe (1) via the connecting port (5).

3. The 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. The 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 set as an open end.

5. The coal pipe for adjusting coal injection amount according to claim 1, characterized in that: The interior of the inflatable ball (10) and the interior of the air bag (9) are communicated with each other.

6. The coal pipe for adjusting coal injection amount according to claim 1, characterized in that: One end of the coal pipe (1) connected to the connecting port (5) is provided with a pipe sleeve (17), and an elastic sealing plug (18) is installed inside the pipe sleeve (17).

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

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