Automatic large slag extruding and crushing system for boiler

Abstract

The invention relates to an automatic large slag extruding and crushing system for a boiler. The automatic large slag extruding and crushing system comprises a shutoff door and a camera, a first spiral pipe is spirally connected to the shutoff door, and a universal flexible shaft is arranged in the first spiral pipe; one end of the first spiral pipe extends out of the shutoff door and is connected with a drill bit; the output end of the universal flexible shaft is connected with the drill bit; the first spiral pipe is connected with an external cooling water source through a soft water supply pipe; first liquid outlet holes which are uniformly distributed are formed in the first spiral pipe; when the camera recognizes that the extruded slag block cannot be crushed but is deformed, the first spiral pipe spirally rotates to be inserted into the slag block; a channel allowing the first spiral pipe to be inserted is drilled in the slag block through the drill bit, and spiral insertion of the first spiral pipe is facilitated. And after the first spiral pipe is inserted into the slag block, external cooling liquid is sprayed into the slag block through the first spiral pipe, and the cooling efficiency is improved by spraying the cooling liquid into the slag block.

Description

Technical Field

[0001] The invention relates to the technical field of boiler slag removal, and in particular to an automatic large slag extrusion and crushing system for a boiler. Background Art

[0002] The basic principle of the dry slag discharge system is to use the convection movement between the ambient air and the hot slag to exchange heat, so that the hot slag is discharged after cooling, and the cold air is heated and then enters the furnace under the action of the negative pressure of the furnace. For the dry slag discharge system, the steel belt slag conveyor is a key component and the main force-bearing equipment. In order to prevent the slag blocks falling from the furnace from falling directly on the steel belt of the dry slag conveyor, a grille is installed above the dry slag discharger, that is, at the outlet of the cold slag bucket, and a shut-off door driven by a hydraulic drive rod is installed on the grille. The main function of the shut-off door is to isolate and squeeze the slag.

[0003] For example, the "dry slag discharge system" disclosed by patent announcement number CN201561432U can start the extrusion device of the hydraulic closing door device to crush the large slag when the slag blocks discharged from the boiler are too large, thereby preventing the large slag blocks from falling onto the conveyor belt and damaging the conveyor belt.

[0004] However, in the actual operation process, when coking occurs in the furnace, relatively large coke blocks fall on the grille. After being observed by the camera, they need to be squeezed and broken. However, due to the limited cooling air volume, the large coke blocks cannot be cooled and hardened. As a result, when squeezed with the shut-off door, the coke blocks are soft and their shape changes, but they still cannot be broken into small pieces and fall onto the steel belt. Even manual slag poking cannot solve the problem at this time. If not handled in time, the slag will become stuck and accumulate more and more. In severe cases, the entire cold ash hopper is full and the furnace has to be stopped for treatment.

[0005] Therefore, it is necessary to cool the larger slag blocks that fall on the grille in the furnace to make the slag blocks harden quickly, and then crush them by squeezing through the extrusion head on the shut-off door;

[0006] For example, the "Isolation and Crushing Device and Method Suitable for Dry Slag Discharge Machine" disclosed in patent announcement number CN102580832B uses a crushing device, a water supply device and an isolation baffle to use small-flow, high-pressure cooling water to water-blast the larger slag blocks that fall on the grille in the furnace, so that the slag blocks harden quickly, and then they are crushed by squeezing through an extrusion head on the shut-off door.

[0007] However, in the prior art, cooling water is sprayed onto the outer surface of the hot slag block. When the slag block is large, its interior is not easy to cool and the cooling efficiency is low. At the same time, when the cold water contacts the high-temperature surface of the slag block, the water will evaporate quickly to form a large amount of white mist, affecting the visual recognition of the external camera. Summary of the invention

[0008] In view of the deficiencies in the prior art, the present invention provides a boiler automated slag extrusion and crushing system to solve the above problems.

[0009] The present invention provides the following technical solutions:

[0010] A boiler automated large slag extrusion and crushing system, comprising a grille arranged at an outlet of a cold slag hopper, a shutoff door installed on the grille, and a camera aimed at the grille;

[0011] The shut-off door is spirally connected to a first spiral tube driven by a first power assembly, wherein the first spiral tube has a universal flexible shaft built therein; one end of the first spiral tube extends to the outside of the shut-off door and is connected to a drill bit;

[0012] The output end of the universal flexible shaft is connected to the drill bit, and the input end is driven by the second power assembly;

[0013] The first spiral tube is connected to an external cooling water source through a soft water supply pipe; the first spiral tube is provided with evenly distributed first liquid outlet holes.

[0014] Preferably, the first power assembly includes an internal tooth groove opened in the shut-off door, a first drive motor, and a drive gear installed at the output end of the first drive motor; a mounting plate is fixedly provided at one end of the first spiral tube, the first drive motor is arranged on the mounting plate, the drive gear is meshed with the internal tooth groove, and the axis of the internal tooth groove is aligned with the axis of the first spiral tube.

[0015] Preferably, the second power assembly drive includes a second drive motor arranged on the mounting plate, and the output end of the second drive motor is connected to the input end of the universal flexible shaft.

[0016] Preferably, a matching second spiral tube is movably sleeved on the outer wall of the first spiral tube, and the second spiral tube is provided with evenly distributed second liquid outlet holes. The first spiral tube and the second spiral tube can be spirally moved relative to each other so that the first liquid outlet holes are aligned or staggered with each other.

[0017] Preferably, the outer wall protrusion of the first spiral tube is provided with a limiting portion, and the second spiral tube is located between two groups of limiting portions.

[0018] Preferably, a rotation control sealing ring is provided on the outer wall of the movable sleeve of the universal flexible shaft.

[0019] Preferably, the rotation control sealing ring includes a movable ring and a fixed ring, both of which are provided with infusion channels, the fixed ring is fixed to the outer wall of the movable sleeve, and the movable ring is rotatably connected to the fixed ring so that the infusion channels on the movable ring and the fixed ring are aligned or staggered with each other.

[0020] Preferably, a thermosensitive component is provided at a position of the fixing ring corresponding to the infusion channel, and the thermosensitive component closes the corresponding infusion channel when heated, and opens the corresponding infusion channel when cooled.

[0021] Preferably, the outer diameter of the drill bit is larger than the outer diameters of the first spiral tube and the second spiral tube.

[0022] Preferably, the shut-off door is provided with a protruding portion on one side of the outer wall through which the first spiral tube spirals in and out.

[0023] The present invention has the following beneficial technical effects:

[0024] When the camera recognizes that the slag block is large in size, the present invention controls the shut-off door driven by the hydraulic cylinder, and the shut-off door squeezes and crushes the large slag block;

[0025] When the camera recognizes that the squeezed slag block cannot be broken but is deformed, the first power component is controlled to drive the first spiral tube to rotate and move to the outside of the shut-off door. In this process, the first spiral tube is spirally inserted into the slag block. At the same time, the second power component drives the drill bit to rotate, and the drill bit drills a channel out of the slag block for the insertion of the first spiral tube, which is facilitating the spiral insertion of the first spiral tube.

[0026] After the first spiral tube is inserted into the slag block, the external coolant is sprayed into the slag block through the first spiral tube. Spraying the coolant into the slag block is beneficial to improving the cooling efficiency.

[0027] Spraying coolant inside the slag block can reduce the amount of coolant used and reduce the formation of white mist. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the shutoff door structure of the present invention;

[0030] Figure 3 yes Figure 2 A schematic diagram of a local A enlargement;

[0031] Figure 4 is a schematic diagram of the first power assembly inside the shutoff door of the present invention;

[0032] Figure 5 This is a schematic diagram of the cooperation between the internal tooth groove and the driving gear of the present invention;

[0033] Figure 6 This is a schematic diagram of the cooperation between the first spiral tube and the second spiral tube of the present invention;

[0034] Figure 7It is a schematic diagram of the cooperation between the movable shaft sleeve and the rotation control sealing ring of the universal flexible shaft of the present invention;

[0035] Figure 8 It is a schematic diagram of the first direction of the rotary control sealing ring of the present invention;

[0036] Fig. 9 It is a schematic diagram of the second direction of the rotation control sealing ring of the present invention.

[0037] The reference numerals in the figure are:

[0038] 1. Camera; 2. Grille; 3. Hydraulic cylinder; 4. Shut-off door; 41. Protrusion; 42. Internal tooth groove; 5. First spiral tube; 51. First liquid outlet; 52. Mounting plate; 53. First drive motor; 54. Drive gear; 55. Limiting part; 6. Drill bit; 61. Second drive motor; 7. Rotation control sealing ring; 71. Movable ring; 72. Fixed ring; 73. Infusion channel; 74. Thermosensitive element; 8. Second spiral sleeve; 81. Second liquid outlet. DETAILED DESCRIPTION

[0039] 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.

[0040] A boiler automated slag extrusion and crushing system, such as Figure 1-9 As shown:

[0041] The grille 2 is arranged at the outlet of the cold slag hopper, and a plurality of shut-off doors 4 are divided into two groups and symmetrically arranged on both sides of the top of the grille 2. The two symmetrical groups of shut-off doors 4 are driven by corresponding hydraulic cylinders 3 to move closer to or away from each other; the camera 1 is aimed at the grille 2, and the camera 1 is a part of the visual recognition system, and the camera 1 is used to capture the image of the slag blocks on the grille 2;

[0042] The visual recognition system adopts the PointNet deep learning model. By capturing video images, it analyzes whether there is large slag on the top of the grid 2. In manual mode, it can output a large slag alarm signal. In automatic mode, it can automatically interlock and shut off the door 4 slag squeezing head to perform crushing action.

[0043] An inner tooth groove 42 is provided in the shut-off door 4, a mounting plate 52 is provided in the inner tooth groove 42, a first drive motor 53, a second drive motor 61 and a planetary gear set are installed on the side wall of the mounting plate 52, a drive gear 54 is installed at the output end of the first drive motor 53, the drive gear 54 is one of the planetary gear sets, and the drive gear 54 (spur gear structure) is meshed with the inner tooth groove 42;

[0044] The first spiral tube 5 is spirally cooperated with the shut-off door 4; one end of the first spiral tube 5 extends to the inner tooth groove 42 and is connected to the mounting plate 52, and the other end extends to the outside of the shut-off door 4 and is rotatably connected to the drill bit 6; the first spiral tube 5 is hollow in design, and a universal flexible shaft is arranged inside the first spiral tube 5, the output end of the universal flexible shaft is connected to the drill bit 6, and the input end of the universal flexible shaft is connected to the output end of the second drive motor 61; and the axis of the first spiral tube 5 is aligned with the axis of the inner tooth groove 42.

[0045] The first spiral tube 5 has first liquid outlet holes 51 evenly formed on its outer wall, the interior of the first spiral tube 5 is connected to an external cooling water source via a soft water supply pipe, two limiting portions 55 are protruded from the outer wall of the first spiral tube 5, a second spiral sleeve 8 is sleeved on the outer wall of the first spiral tube 5 between the two limiting portions 55, and second liquid outlet holes 81 are evenly formed on the outer wall of the second spiral sleeve 8; the inner contour of the second spiral sleeve 8 is matched with the outer contour of the first spiral tube 5.

[0046] The outer wall of the movable sleeve of the universal flexible shaft is provided with a rotation control sealing ring 7, and the movable sleeve is liquid-tightly matched with the inner wall of the first spiral tube 5 through the rotation control sealing ring 7;

[0047] The rotation control sealing ring 7 includes a movable ring 71 and a fixed ring 72. The movable ring 71 and the fixed ring 72 are both provided with corresponding infusion channels 73. The fixed ring 72 is fixed to the outer wall of the movable shaft sleeve. The movable ring 72 is rotationally connected to the coaxial side wall of the fixed ring 71 and the rotation angle is limited. An elastic sealing layer is provided on the outer edge of the movable ring 72 to improve the sealing effect between the movable ring 72 and the inner wall of the first spiral tube 5. A thermal sensitive component 74 is provided at the infusion channel 73 of the movable ring 71.

[0048] Embodiment 1:

[0049] Under normal circumstances, most of the first spiral tube 5 is spirally hidden in the inner cavity of the inner tooth groove 42 of the shut-off door 4, and the drill bit 6 is now attached to the side wall of the shut-off door 4; when the camera 1 recognizes that there are large slag blocks on the top of the grille 2, the shut-off door 4 driven by the hydraulic cylinder 3 is controlled, and the two symmetrical shut-off doors 4 cooperate to squeeze and crush the large slag blocks; in this process, the protrusion 41 on the side wall of the shut-off door 4 can prevent the slag blocks from contacting the drill bit 6.

[0050] When the two symmetrical shut-off doors 4 cooperate to squeeze and crush the larger slag blocks, the camera 1 recognizes that the slag blocks are greatly deformed and cannot be crushed. The deformation of the slag blocks indicates that the texture is relatively soft, and the hydraulic cylinder 3 is controlled to stop driving;

[0051] At the same time, the first driving motor 53 is controlled to drive the driving gear 54 to rotate in the positive direction. The gear 54 rotates in cooperation with the relatively fixed inner tooth groove 42 to push the gear 54 to rotate around the axis of the inner tooth groove 42, thereby realizing the rotation of the mounting plate 52. The rotation of the mounting plate 52 drives the first spiral tube 5 to rotate accordingly, and the first spiral tube 5 rotates and moves to the outside of the shut-off door 4.

[0052] At the same time, the second driving motor 61 drives the drill bit 6 to rotate at the end of the first spiral tube 5 through the universal flexible shaft, and the drill bit 6 at the end of the first spiral tube 5 rotates to drill a hole in the slag block, providing a channel for the subsequent first spiral tube 5 to be spirally inserted into the interior of the slag block;

[0053] During this process, the driving gear 54 moves relatively along the axial direction of the inner tooth groove 42 / the first spiral tube 5 to adapt.

[0054] After the first spiral tube 5 is spirally inserted into the slag block, the external cooling water source is transported to the first spiral tube 5 through the soft water supply pipe, and sprayed into the slag block through the first liquid outlet 51, so as to spray the cooling liquid inside the slag block to improve the cooling effect. Afterwards, the first spiral tube 5 is reversely rotated to separate from the slag block and reset.

[0055] A gap is left between the inner cavity of the first spiral tube 5 and the universal flexible shaft for cooling water to flow.

[0056] The hydraulic cylinder 3 continues to push the shut-off door 4 to crush the slag blocks that have been hardened by water cooling. The visual recognition system controls the hydraulic cylinder 3 to reset after detecting the crushing of the slag blocks through the camera 1.

[0057] Embodiment 2 includes all the contents of Embodiment 1:

[0058] When the first drive motor 53 rotates forward, the second spiral sleeve 8 moves relative to the first spiral tube 5 under the action of external friction force, so that the second spiral sleeve 8 abuts against one of the limiting portions 55. At this time, the second liquid outlet hole 81 on the second spiral sleeve 8 is staggered with the first liquid outlet hole 51 on the first spiral tube 5, so that the first liquid outlet hole 51 is closed by the second spiral sleeve 8; therefore, during the process of spirally inserting the first spiral tube 5 into the slag block, the coolant inside the first spiral tube 5 will not flow out, thereby preventing the slag block from hardening due to water cooling, making it more difficult for the drill bit 6 to drill a hole.

[0059] After the first spiral tube 5 is spirally inserted into the interior of the slag block, the first drive motor 53 is controlled to rotate in the opposite direction. First, the second spiral sleeve 8 moves in the opposite direction relative to the first spiral tube 5 under the action of external friction force, so that the second spiral sleeve 8 abuts against another limiting portion 55. At this time, the second liquid outlet 81 on the second spiral sleeve 8 is aligned one-to-one with the first liquid outlet 51 on the first spiral tube 5, so that the first liquid outlet 51 is in an open state; the coolant inside the first spiral tube 5 flows out through the first liquid outlet 51 and the second liquid outlet 81 to water-cool the interior of the slag block; the slag block is hardened by being sprayed with water.

[0060] The first spiral tube 5 rotates in the opposite direction and is drawn out from the inside of the slag block.

[0061] Embodiment 3 includes all the contents of Embodiment 2:

[0062] When the first drive motor 53 rotates forward to cause the first spiral tube 5 to be spirally inserted into the slag block, the second drive motor 61 drives the universal flexible shaft to rotate forward. During this process, the movable ring 71 first rotates relative to the fixed ring 72 to the first limit position through the friction between the movable ring 71 and the inner wall of the first spiral tube 5. At this time, the infusion channels 73 of the movable ring 71 and the fixed ring 72 are staggered with each other, so that the rotation control sealing ring is in a closed state at this time, thereby blocking the flow of cooling water from the outside to the end of the first spiral tube 5 through the rotation control sealing ring, thereby avoiding the cooling water built into the end of the first spiral tube 5, which causes the slag block to harden and makes it inconvenient for the drill bit 6 to drill a hole.

[0063] Before the first drive motor 53 rotates in the reverse direction to spirally extract the first spiral tube 5 from the inside of the slag block, the second drive motor 61 first drives the universal flexible shaft to rotate in the reverse direction. During this process, the movable ring 71 first rotates in the reverse direction relative to the fixed ring 72 to the second limit position through the friction between the movable ring 71 and the inner wall of the first spiral tube 5. At this time, the infusion channels 73 of the movable ring 71 and the fixed ring 72 are connected one by one, so that the rotation control sealing ring is in an open state at this time, so that the external cooling water can flow freely in the first spiral tube 5.

[0064] Embodiment 4 includes all the contents of Embodiment 3:

[0065] When the first driving motor 53 rotates forward so that the first spiral tube 5 is spirally inserted into the slag block, the thermal sensitive element 74 in the initial state is in a state of closing the one-to-one corresponding infusion channel 73, further blocking the flow of cooling water from the outside to the end of the first spiral tube 5;

[0066] When the first spiral tube 5 is spirally inserted into the slag block, the heat inside the slag block is relatively high, and the heat-sensitive element 74 is deformed by the heat and opens the corresponding infusion channel 73;

[0067] After the external cooling water cools the inside of the slag block, the internal temperature of the slag block decreases, and the temperature of the thermistor 74 follows the decrease and returns to its original state, and is in a closed one-to-one corresponding infusion channel 73 state, thereby preventing the cooling water from continuing to be delivered due to improper operation after the slag block is cooled and hardened, causing the outflowing cold water to contact the outer surface of other slag blocks, and the water is evaporated to form a large amount of white mist, affecting the visual recognition effect of the external camera.

[0068] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A boiler automated large slag squeezing and crushing system, comprising a grid (2) arranged at an outlet of a cold slag hopper, a shutoff door (4) installed on the grid (2), and a camera (1) aimed at the grid (2), characterized in that: The shutoff door (4) is spirally connected to a first spiral tube (5) driven by a first power assembly, wherein the first spiral tube (5) has a universal flexible shaft built therein; one end of the first spiral tube (5) extends to the outside of the shutoff door (4) and is connected to a drill bit (6); The output end of the universal flexible shaft is connected to the drill bit (6), and the input end is driven by a second power assembly; The first spiral tube (5) is connected to an external cooling water source via a soft water supply pipe; the first spiral tube (5) is provided with evenly distributed first liquid outlet holes (51).

2. The boiler automated slag extrusion and crushing system according to claim 1 is characterized in that: The first power assembly comprises an inner tooth groove (42) provided in the shutoff door (4), a first drive motor (53), and a drive gear (54) mounted on the output end of the first drive motor (53); a mounting plate (52) is fixedly provided at one end of the first spiral tube (5), the first drive motor (53) is arranged on the mounting plate (52), the drive gear (54) is meshed with the inner tooth groove (42), and the axis of the inner tooth groove (42) is aligned with the axis of the first spiral tube (5).

3. The boiler automated slag extrusion and crushing system according to claim 2 is characterized in that: The second power assembly drive comprises a second drive motor (61) arranged on the mounting plate (52), and the output end of the second drive motor (61) is connected to the input end of the universal flexible shaft.

4. The boiler automated slag extrusion and crushing system according to claim 1 is characterized in that: The outer wall of the first spiral tube (5) is movably sleeved with a matching second spiral tube (8), and the second spiral tube (8) is provided with evenly distributed second liquid outlet holes (81). The first spiral tube (5) and the second spiral tube (8) are relatively spirally movable so that the first liquid outlet holes (51) and the second liquid outlet holes (81) are aligned or staggered with each other.

5. The boiler automated slag extrusion and crushing system according to claim 4 is characterized in that: The outer wall of the first spiral tube (5) is protruded to provide a limiting portion (55), and the second spiral tube (8) is located between two groups of limiting portions (55).

6. The boiler automated slag extrusion and crushing system according to claim 4, characterized in that: The outer wall of the movable shaft sleeve of the universal flexible shaft is provided with a rotation control sealing ring (7).

7. The boiler automated slag extrusion and crushing system according to claim 6, characterized in that: The rotation control sealing ring (7) comprises a movable ring (71) and a fixed ring (72), each of the movable ring (71) and the fixed ring (72) being provided with an infusion channel (73), the fixed ring (72) being fixed to the outer wall of the movable shaft sleeve, and the movable ring (71) being rotationally connected to the fixed ring (72) so that the infusion channels (73) on the movable ring (71) and the fixed ring (72) are aligned with or staggered with each other.

8. The boiler automated slag extrusion and crushing system according to claim 7, characterized in that: The fixing ring (72) is provided with a heat-sensitive component (74) at a position corresponding to the infusion channel (73); the heat-sensitive component (74) closes the corresponding infusion channel (73) when heated, and opens the corresponding infusion channel (73) when cooled.

9. The boiler automated slag extrusion and crushing system according to claim 4, characterized in that: The outer diameter of the drill bit (6) is greater than the outer diameters of the first spiral tube (5) and the second spiral tube (8).

10. The boiler automated slag extrusion and crushing system according to claim 1, characterized in that: The shut-off door (4) is provided with a protruding portion (41) on one side of the outer wall of the shut-off door (4) for the first spiral tube (5) to spirally enter and exit.

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