Automatic dredging device for conical section of slag falling pipe

Abstract

The invention relates to the technical field of slag falling pipes, in particular to a slag falling pipe conical section automatic dredging device which comprises a device body installed on the side face of a slag falling pipe conical section, a heat insulation cavity and a driving cavity are formed in the device body at intervals, and the heat insulation cavity communicates with the interior of the slag falling pipe conical section through a first sliding hole. The cavity wall, opposite to one side of the first sliding hole, of the heat insulation cavity communicates with the driving cavity through a second sliding hole, the first sliding hole and the second sliding hole are arranged in parallel, a slag poking rod is slidably arranged in the first sliding hole, a pushing rod is slidably arranged in the second sliding hole, and the pushing rod is in transmission connection with the slag poking rod in the heat insulation cavity; a driving assembly used for driving the pushing rod to reciprocate along the second sliding hole is arranged in the driving cavity. The problem that in the prior art, an effective automatic dredging device is not additionally arranged on a conical section of a slag falling pipe for dredging, and the position is prone to being blocked is solved.

Description

Technical Field

[0001] The invention relates to the technical field of slag dropping pipes, and in particular to an automatic dredging device for a cone section of a slag dropping pipe. Background Art

[0002] The development and application of circulating fluidized bed boiler technology has been widely used. This technology is one of the advanced technologies for clean coal combustion and sustainable development strategy. It integrates the advantages of energy saving, clean combustion, safety and reliability, and reduced pollution emissions. However, in the actual operation of the boiler, some local structural problems will also affect the efficiency of the boiler. For example, due to the frequent blockage of the boiler slag pipe, the safe and economic operation of the boiler is seriously affected.

[0003] The lower part of the slag drop pipe is connected to the slag cooler through a metal compensator. The metal compensator is used to compensate for the three-dimensional displacement caused by the thermal expansion of the boiler, resulting in a flared structure at the lower part of the expansion joint. A cone section with a gradually decreasing diameter is provided at the position where the upper end of the slag cooler inlet pipe is connected to the lower end of the metal compensator. Figure 1 As shown, the cone section is used as the intermediate connecting section between the metal compensator and the slag inlet pipe of the slag cooler.

[0004] Due to the large upper part and small lower part of the cone section, this position is prone to material blockage. Once the slag pipe is blocked, it can only be unblocked by vibration or manual opening. On the other hand, frequent blockages may also cause the boiler furnace bed pressure to increase, causing potential damage to the boiler and equipment downstream of the slag pipe, and increase the cost and frequency of equipment maintenance. However, in the prior art, there is no effective automatic unblocking device installed at this position of the coal drop pipe for unblocking. Most of them rely on manual knocking on the slag drop pipe for unblocking, which has low unblocking efficiency and poses certain safety hazards. Summary of the invention

[0005] The purpose of the present invention is to provide an automatic unclogging device for the cone section of a slag dropping pipe, so as to solve the problem in the prior art that the cone section of the slag dropping pipe is not equipped with an effective automatic unclogging device for unclogging, and this position is prone to blockage.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: An automatic clearing device for a cone section of a slag dropping pipe comprises a device body installed on the side of the cone section of the slag dropping pipe, wherein a heat insulating chamber and a driving chamber are arranged in the device body at intervals, the heat insulating chamber is connected with the inside of the cone section of the slag dropping pipe through a first sliding hole, the cavity wall of the heat insulating chamber on the side opposite to the first sliding hole is connected with the driving chamber through a second sliding hole, the first sliding hole and the second sliding hole are arranged in parallel, a slag poking rod is slidably arranged in the first sliding hole, a pushing rod is slidably arranged in the second sliding hole, the pushing rod is transmission-connected to the slag poking rod in the heat insulating chamber, and a driving component for driving the pushing rod to reciprocate along the second sliding hole is arranged in the driving chamber.

[0007] A further technical solution is that the driving assembly includes a lead screw, a driving nut and a rubber buffer block, and two second sliding holes and a push rod are matched with each other. The lead screw and the push rod are arranged in parallel in the driving cavity. One end of the lead screw is rotatably connected to the cavity wall of the driving cavity, and the other end passes through the driving cavity. A driving motor is connected to the outside of the device body, and the driving nut is threadedly matched on the lead screw. The rubber buffer block is connected to the driving nut, and one end of the two push rods placed in the driving cavity is connected to the rubber buffer block.

[0008] A further technical solution is that a driving plate is arranged around the rubber buffer block, and one end of the push rod placed in the driving cavity is connected to the driving plate through a connecting bolt.

[0009] A further technical solution is that the insulation chamber is divided into a first chamber and a second chamber by a vertically arranged partition between the first sliding hole and the second sliding hole. The first chamber is connected to the interior of the cone section of the slag dropping pipe through the first sliding hole, and the second chamber is connected to the driving chamber through the second sliding hole. A third sliding hole connecting the first chamber and the second chamber is provided on the partition, and the third sliding hole is aligned with the first sliding hole. One end of the slag poking rod is placed in the cone section of the slag dropping pipe, and the other end passes through the first sliding hole and the third sliding hole in sequence and is connected to the push rod in the second chamber.

[0010] A further technical solution is that one end of the push rod placed in the second chamber is connected to a thrust plate, and one end of the slag poking rod placed in the second chamber is connected to the thrust plate.

[0011] A further technical solution is that a packing sleeve is installed in the third sliding hole, and the outer wall of the slag-poking rod is slidably fitted with the inner wall of the packing sleeve.

[0012] A further technical solution is that a sealing packing is provided on the inner wall of the packing sleeve, the outer wall of the sealing packing is connected to the inner wall of the packing sleeve, and the inner wall of the sealing packing is slidably fitted with the outer wall of the slag-poking rod; a connecting rod is provided on the side of the thrust plate facing the third sliding hole, and a connecting groove is provided at the end of the connecting rod facing the third sliding hole, and a connecting column is formed on the end of the slag-poking rod facing the thrust plate, and the connecting column is assembled in the connecting groove.

[0013] A further technical solution is that a purge ring is installed on the side of the first sliding hole facing the packing sleeve, and a purge ring groove is recessed on the side of the purge ring facing the first sliding hole. The purge ring groove is connected to an external air supply device through an air inlet pipe. The diameter of the first sliding hole gradually expands from the middle to the end connected to the purge ring to form a bell mouth, and the purge ring groove is aligned and connected to the bell mouth; the aperture of the first sliding hole is larger than the diameter of the slag poking rod.

[0014] A further technical solution is that the number of the slag-poking rod and the first sliding hole is more than two.

[0015] Compared with the prior art, the present invention has at least one of the following beneficial effects: 1. Through the cooperation of the driving component and the pushing rod, the slag prying rod can be driven to perform reciprocating motion in the first sliding hole, so that the end of the slag prying rod can be reciprocatedly inserted into the interior of the slag pipe cone, and the ash moved to the coal dropping pipe cone section can be in a loose state to avoid blockage. For the situation where it has already been blocked, the dredging effect can also be achieved through multiple insertions of the slag prying rod; 2. By setting up a heat-insulating cavity as the connecting space between the slag prying rod and the pushing rod, the slag prying rod and the leaked fine ash will only enter the heat-insulating cavity and will not enter the driving cavity. In this way, the high-temperature slag prying rod and the leaked fine ash have less influence on the driving cavity, thus avoiding the heating and jamming of the driving component. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the slag dropping pipe.

[0017] Figure 2 It is a side sectional view of an automatic dredging device for a cone section of a slag falling pipe according to the present invention.

[0018] Figure 3 for Figure 2 A partial enlarged schematic diagram of the area marked A in the middle.

[0019] Figure 4 It is a schematic diagram of a driving chamber of an automatic dredging device for a cone section of a slag falling pipe according to the present invention.

[0020] Icons: 1-device body, 2-cone section of slag dropping pipe, 3-insulation chamber, 4-driving chamber, 5-first sliding hole, 6-second sliding hole, 7-slag poking rod, 8-pushing rod, 9-lead screw, 10-rubber buffer block, 11-driving motor, 12-driving nut, 13-driving plate, 14-connecting bolt, 15-partition, 16-first chamber, 17-second chamber, 18-third sliding hole, 19-thrust plate, 20-packing sleeve, 22-purge ring, 23-purge ring groove, 24-inlet pipe, 25-bell mouth, 26-sealing packing, 27-connecting rod, 28-connecting groove, 29-connecting column, 30-rubber buffer block. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] Figures 2 to 4 An embodiment of the present invention is shown.

[0023] Example: An automatic clearing device for a slag pipe cone section comprises a device body 1 installed on the side of the slag pipe cone section 2, wherein a heat insulating chamber 3 and a driving chamber 4 are arranged in the device body 1 at intervals, the heat insulating chamber 3 is connected with the inside of the slag pipe cone section 2 through a first sliding hole 5, the cavity wall of the heat insulating chamber 3 on the side opposite to the first sliding hole 5 is connected with the driving chamber 4 through a second sliding hole 6, the first sliding hole 5 and the second sliding hole 6 are arranged in parallel, a slag poking rod 7 is slidably arranged in the first sliding hole 5, a pushing rod 8 is slidably arranged in the second sliding hole 6, the pushing rod 8 is transmission-connected to the slag poking rod 7 in the heat insulating chamber 3, and a driving component for driving the pushing rod 8 to reciprocate along the second sliding hole 6 is arranged in the driving chamber 4. Through the cooperation of the driving assembly and the pushing rod 8, the slag-poking rod 7 can be driven to reciprocate in the first sliding hole 5, so that the end of the slag-poking rod 7 can reciprocate and poke the inner wall of the slag-dropping pipe cone section 2, so that the ash and slag moved to the coal-dropping pipe cone section can be in a loose state to avoid blockage. For the situation where it has been blocked, it can also play a dredging effect through multiple poking and insertion of the slag-poking rod 7. By setting the heat insulation chamber 3 as the connection space between the slag-poking rod 7 and the pushing rod 8, the slag-poking rod 7 and the fine ash carried by the leakage will only enter the heat insulation chamber 3 and will not enter the driving chamber 4. In this way, the high-temperature slag-poking rod 7 and the fine ash carried by the leakage have little effect on the driving chamber 4, avoiding the heating and jamming of the driving assembly.

[0024] The drive assembly includes a lead screw 9, a drive nut 12 and a rubber buffer block 10. Two second sliding holes 6 and a push rod 8 are matched. The lead screw 9 and the push rod 8 are arranged in parallel in the drive cavity 4. One end of the lead screw 9 is rotatably connected to the cavity wall of the drive cavity 4, and the other end passes through the drive cavity 4. A drive motor 11 is connected to the outside of the device body 1. The drive nut 12 is threadedly matched and sleeved on the lead screw 9. The rubber buffer block 10 is connected to the drive nut 12. One end of the two push rods 8 placed in the drive cavity 4 is connected to the rubber buffer block 10. With such an arrangement, when the drive motor 11 is started, the drive motor 11 drives the lead screw 9 to rotate in the drive chamber 4 through a coupling or other transmission connecting parts. When the lead screw 9 rotates, threaded transmission occurs through the drive nut 12 and the rubber buffer block 10. Since the rubber buffer block 10 cannot rotate with the lead screw 9 under the restriction of the two push rods 8, it will move along the length direction of the lead screw 9 when the lead screw 9 rotates, thereby driving the push rod 8 to move in the second sliding hole 6. The rubber buffer block 10 can prevent the drive nut 12 from hard collision with the front and rear ends of the drive chamber.

[0025] A driving plate 13 is arranged around the rubber buffer block 10, and one end of the push rod 8 placed in the driving chamber 4 is connected to the driving plate 13 through a connecting bolt 14. By providing the driving plate 13, it can serve as a transfer room between the driving nut 12, the rubber buffer block 10 and the push rod 8, so as to better drive the push rod 8 to move. By connecting the bolts 14, the push rod 8 and the driving plate 13 can be stably connected together. The rubber buffer block 10 is sandwiched between the driving plate 13 and the driving nut 12, and is connected by installing bolts. When the slag-poking rod 7 is working, it can serve as a buffer component between the driving plate 13 and the driving nut 12, and play a buffering role.

[0026] The heat insulation chamber 3 is separated into a first chamber 16 and a second chamber 17 by a vertically arranged partition 15 between the first sliding hole 5 and the second sliding hole 6. The first chamber 16 is connected to the inside of the slag falling pipe cone section 2 through the first sliding hole 5, and the second chamber 17 is connected to the driving chamber 4 through the second sliding hole 6. The partition 15 is provided with a third sliding hole 18 connecting the first chamber 16 and the second chamber 17, and the third sliding hole 18 is aligned with the first sliding hole 5. One end of the slag poking rod 7 is placed in the slag falling pipe cone section 2, and the other end passes through the first sliding hole 5 and the third sliding hole 18 in sequence and is connected to the push rod 8 in the second chamber 17. By setting the partition 15, the heat insulation chamber 3 can be better divided into two chambers with different temperature zones, namely the first chamber 16 and the second chamber 17. In the process of the slag poking rod 7 moving, the slag poking rod 7 is always in the first chamber 16, and the temperature of the first chamber 16 is relatively high and the dust is accumulated a lot. During the movement of the slag-poking rod 7 in the second chamber 17, the length of the slag-poking rod 7 in the second chamber 17 changes at any time, and the temperature of the slag-poking rod 7 in the second chamber 17 is lower than that of the slag-dropping pipe cone section 2, and more dust is accumulated, thereby avoiding the thrust rod 8 from getting stuck.

[0027] One end of the push rod 8 placed in the second chamber 17 is connected to a thrust plate 19, and one end of the slag-poking rod 7 placed in the second chamber 17 is connected to the thrust plate 19. By providing the thrust plate 19, it can serve as a connecting piece between the push rod 8 and the slag-poking rod 7 to drive the slag-poking rod 7 to reciprocate.

[0028] A packing sleeve 20 is installed in the third sliding hole 18, and the outer wall of the slag-poking rod 7 is slidably fitted with the inner wall of the packing sleeve 20. By providing the packing sleeve 20, the slag-poking rod 7 can be well guided, so that the slag-poking rod 7 can smoothly perform linear motion during use.

[0029] A purge ring 22 is installed on the side of the first sliding hole 5 facing the packing sleeve 20, and a purge ring groove 23 is recessed on the side of the purge ring 22 facing the first sliding hole 5. The purge ring groove 23 is connected to an external air supply device through an air inlet pipe 24. The diameter of the first sliding hole 5 gradually expands from the middle to the end connected to the purge ring 22 to form a bell mouth 25, and the purge ring groove 23 is aligned and connected with the bell mouth 25; the aperture of the first sliding hole 5 is larger than the diameter of the slag poking rod 7. With the help of the purge ring 22, the surface of the slag poking rod 7 can be purged and an air seal can be formed to prevent the slag poking rod 7 from driving too much ash and slag into the first chamber 16 during the reciprocating motion, causing the first chamber 16 to accumulate ash and slag. At the same time, the surface of the slag poking rod 7 can be cooled by low-temperature air during the reciprocating motion of the slag poking rod 7, thereby improving the durability of the slag poking rod 7. The air supply device can be an air compressor. The high-pressure air generated by the air compressor enters the purge ring groove 23 through the air inlet pipe 24. The air in the purge ring groove 23 enters the first sliding hole 5 through the bell mouth 25, and enters the interior of the slag dropping pipe cone section 2 along the first sliding hole 5. The surface of the slag poking rod 7 can be purged during the air flow.

[0030] The inner wall of the packing sleeve 20 is provided with a sealing packing 26, the outer wall of the sealing packing 26 is connected to the inner wall of the packing sleeve 20, and the inner wall of the sealing packing 26 is slidably fitted with the outer wall of the slag-poking rod 7; a connecting rod 27 is provided on the side of the thrust plate 19 facing the third sliding hole 18, and a connecting groove 28 is provided at the end of the connecting rod 27 facing the third sliding hole 18, and a connecting column 29 is formed at the end of the slag-poking rod 7 facing the thrust plate 19, and the connecting column 29 is assembled in the connecting groove 28. By providing the sealing packing 26, the surface of the slag-poking rod 7 can be cleaned when the slag-poking rod 7 reciprocates, so as to prevent the ash residue on the surface from entering the second chamber 17. By providing the connecting rod 27, it can be used as a connecting piece between the slag-poking rod 7 and the thrust plate 19. Since the connecting rod 27 does not participate in entering the slag-dropping pipe cone section 2 for dredging, the connecting rod 27 can be made of a low thermal conductivity material, which can effectively reduce the heat of the slag-poking rod 7 from being transferred to the thrust plate 19. The connecting rod 27 and the thrust plate 19 can be well connected through the connecting column 29 and the connecting groove 28. The connecting column 29 and the connecting groove 28 can be connected by threads, which is convenient for subsequent disassembly and replacement. With the help of the shaft sleeve 20 and the sealing packing 26, the slag-poking rod 7 does not directly contact the third sliding hole 18, so that the third sliding hole 18 will not be worn. After the slag-poking rod 7 is used for a long time, if the sealing packing 26 is worn, it is only necessary to remove the sealing packing 26 for replacement. There are two thrust plates 19, and the other thrust plate 19 is arranged in parallel at intervals, and the two thrust plates 19 are provided with aligned mounting holes. The two thrust plates 19 are connected by a connecting pipe, and the two ends of the connecting pipe are respectively aligned and connected with the mounting holes on the two thrust plates 19. The outer wall of the connecting rod 27 away from the end of the slag-poking rod 7 is installed in the two connecting holes and the connecting pipe. Such a setting can improve the stability and firmness of the installation of the connecting rod 27. The number of the slag-poking rod 7 and the first sliding hole 5 is more than two. Figure 2 As shown, three slag-poking rods 7 can be provided, so that the dredging efficiency and dredging effect can be improved by dredging multiple positions in the slag-falling pipe cone section 2 at the same time.

[0031] Although the present invention is described herein with reference to a number of illustrative embodiments of the present invention, it will be appreciated that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, drawings, and claims, a variety of variations and modifications may be made to the components and / or layout of the subject combination layout. In addition to the variations and modifications made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. An automatic dredging device for the cone section of a slag falling pipe, characterized in that: The invention comprises a device body (1) installed on the side of a slag dropping pipe cone section (2), wherein a heat insulating chamber (3) and a driving chamber (4) are arranged in the device body (1), wherein the heat insulating chamber (3) is connected to the inside of the slag dropping pipe cone section (2) through a first sliding hole (5), and the chamber wall of the heat insulating chamber (3) opposite to the first sliding hole (5) is connected to the driving chamber (4) through a second sliding hole (6), wherein the first sliding hole (5) and the second sliding hole (6) are arranged in parallel, wherein a slag poking rod (7) is slidably arranged in the first sliding hole (5), and wherein a pushing rod (8) is slidably arranged in the second sliding hole (6), wherein the pushing rod (8) is transmission-connected to the slag poking rod (7) in the heat insulating chamber (3), and wherein a driving assembly for driving the pushing rod (8) to reciprocate along the second sliding hole (6) is arranged in the driving chamber (4).

2. The automatic dredging device for the cone section of a slag falling pipe according to claim 1 is characterized in that: The driving assembly comprises a lead screw (9), a driving nut (12) and a rubber buffer block (10); the second sliding hole (6) and the push rod (8) are matched with each other and are provided with two of them; the lead screw (9) and the push rod (8) are arranged in parallel in the driving cavity (4); one end of the lead screw (9) is rotatably connected to the cavity wall of the driving cavity (4), and the other end passes through the driving cavity (4); a driving motor (11) is connected to the outside of the device body (1); the driving nut (12) is threadedly matched and sleeved on the lead screw (9); the rubber buffer block (10) is connected to the driving nut (12); and one end of the two push rods (8) placed in the driving cavity (4) is connected to the rubber buffer block (10).

3. The automatic dredging device for the cone section of a slag falling pipe according to claim 2 is characterized in that: A driving plate (13) is arranged around the rubber buffer block (10), and one end of the push rod (8) disposed in the driving chamber (4) is connected to the driving plate (13) via a connecting bolt (14).

4. The automatic dredging device for the cone section of a slag falling pipe according to claim 1 is characterized in that: The heat-insulating cavity (3) is divided into a first chamber (16) and a second chamber (17) by a partition (15) arranged vertically between the first sliding hole (5) and the second sliding hole (6); the first chamber (16) is connected to the interior of the slag dropping pipe cone section (2) through the first sliding hole (5); the second chamber (17) is connected to the driving cavity (4) through the second sliding hole (6); a third sliding hole (18) connecting the first chamber (16) and the second chamber (17) is arranged on the partition (15); the third sliding hole (18) is aligned with the first sliding hole (5); one end of the slag poking rod (7) is placed in the slag dropping pipe cone section (2); the other end passes through the first sliding hole (5) and the third sliding hole (18) in sequence and is then connected to the pushing rod (8) in the second chamber (17) by transmission.

5. The automatic dredging device for the cone section of a slag falling pipe according to claim 4 is characterized in that: One end of the push rod (8) placed in the second chamber (17) is connected to a thrust plate (19), and one end of the slag poking rod (7) placed in the second chamber (17) is connected to the thrust plate (19).

6. The automatic dredging device for the cone section of a slag falling pipe according to claim 4 is characterized in that: A packing sleeve (20) is installed in the third sliding hole (18), and the outer wall of the slag-poking rod (7) is slidably fitted with the inner wall of the packing sleeve (20).

7. The automatic dredging device for the cone section of a slag falling pipe according to claim 4 is characterized by: The inner wall of the packing sleeve (20) is provided with a sealing packing (26), the outer wall of the sealing packing (26) is connected to the inner wall of the packing sleeve (20), and the inner wall of the sealing packing (26) is slidably fitted with the outer wall of the slag-poking rod (7); a connecting rod (27) is provided on the side of the thrust plate (19) facing the third sliding hole (18), and a connecting groove (28) is recessed at the end of the connecting rod (27) facing the third sliding hole (18), and a connecting column (29) is formed at the end of the slag-poking rod (7) facing the thrust plate (19), and the connecting column (29) is assembled in the connecting groove (28).

8. The automatic dredging device for the cone section of a slag falling pipe according to claim 1 is characterized by: A purge ring (22) is installed on the side of the first sliding hole (5) facing the packing sleeve (20); a purge ring groove (23) is recessed on the side of the purge ring (22) facing the first sliding hole (5); the purge ring groove (23) is connected to an external air supply device via an air inlet pipe (24); the diameter of the first sliding hole (5) gradually expands from the middle to the end connected to the purge ring (22) to form a bell mouth (25); the purge ring groove (23) is aligned and connected to the bell mouth (25); the aperture of the first sliding hole (5) is larger than the diameter of the slag poking rod (7).

9. The automatic dredging device for the cone section of a slag falling pipe according to claim 1 is characterized by: The number of the slag-poking rod (7) and the first sliding hole (5) is set to be more than two.

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