Automatic dredging device for conical section of slag falling pipe

Abstract

The utility model relates to the technical field of slag falling pipes, in particular to an automatic dredging device for a conical section of a slag falling pipe, which comprises a device body mounted on the side face of the conical section of the slag falling pipe, a heat insulation cavity and a driving cavity are arranged in the device body at intervals, and the heat insulation cavity is communicated with the interior of the conical section of the slag falling pipe 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 utility model relates to a falling slag pipe technology field, concretely relates to a falling slag pipe cone section automatic dredging device. BACKGROUND

[0002] The development and application of circulating fluidized bed boiler technology have been widely applied. The technology is one of the advanced technologies for clean coal combustion and realizing sustainable development strategy. It integrates the advantages of energy saving, clean combustion, safety and reliability, and pollution emission reduction. However, in the actual operation of the boiler, some local structural problems will also affect the efficiency of the boiler, such as the frequent blockage problem of the boiler slag pipe, which seriously affects the safe and economic operation of the boiler.

[0003] Among them, the lower part of the slag pipe is connected with the slag cooler through the metal compensator, the metal compensator is used for compensating the three-dimensional displacement caused by the thermal expansion of the boiler, the lower part of the expansion joint is provided with a flared structure, and a tapered section with gradually reducing diameter is arranged at the position where the upper end of the slag cooler inlet pipe is connected with the lower end of the metal compensator. Figure 1 As shown, the tapered section is used as the intermediate connecting section of the metal compensator and the slag cooler inlet pipe.

[0004] Due to the characteristics of the tapered section that the upper part is large and the lower part is small, material blockage is prone to occur at this position. Once the slag pipe is blocked, it can only be dredged by vibration or manual opening. On the other hand, frequent blockage may also cause the bed pressure of the boiler furnace to rise, which may cause potential damage to the boiler and downstream equipment of the slag pipe, and increase the equipment maintenance cost and frequency. However, in the prior art, the coal falling pipe does not install an effective automatic dredging device at this position for dredging, and most of them rely on manual knocking of the slag pipe for dredging, which has low dredging efficiency and certain safety hazards. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a falling slag pipe cone section automatic dredging device, solving the problem that the cone section of the slag pipe does not install an effective automatic dredging device for dredging in the prior art, and the position is prone to blockage.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme:

[0007] The utility model provides an automatic dredging device for slag chute cone section, which comprises a device body installed on the side of the slag chute cone section, a heat insulation cavity and a driving cavity are arranged in the device body, the heat insulation cavity is connected with the inside of the slag chute cone section through a first sliding hole, the cavity wall on the side of the heat insulation cavity opposite to the first sliding hole is connected 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, the pushing rod is connected with the slag poking rod in transmission in the heat insulation cavity, and a driving assembly for driving the pushing rod to reciprocate along the second sliding hole is arranged in the driving cavity.

[0008] Further, the driving assembly comprises a lead screw, a driving nut and a rubber buffer block, the second sliding hole and the pushing rod are matched with two, the lead screw is arranged in the driving cavity in parallel with the pushing rod, one end of the lead screw is rotationally connected with the cavity wall of the driving cavity, the other end of the lead screw penetrates out of the driving cavity, a driving motor is connected to the outside of the device body, the driving nut is threadedly matched with the lead screw, the rubber buffer block is connected with the driving nut, and one end of each of the two pushing rods arranged in the driving cavity is connected with the rubber buffer block.

[0009] Further, a driving plate is arranged around the rubber buffer block, and one end of the pushing rod arranged in the driving cavity is connected with the driving plate through a connecting bolt.

[0010] Further, the heat insulation cavity is divided into a first chamber and a second chamber by a vertical partition plate arranged between the first sliding hole and the second sliding hole, the first chamber is connected with the inside of the slag chute cone section through the first sliding hole, the second chamber is connected with the driving cavity through the second sliding hole, a third sliding hole for connecting the first chamber and the second chamber is arranged on the partition plate, the third sliding hole is aligned with the first sliding hole, one end of the slag poking rod is arranged in the slag chute cone section, the other end of the slag poking rod penetrates through the first sliding hole and the third sliding hole in sequence and is connected with the pushing rod in transmission in the second chamber.

[0011] Further, one end of the pushing rod arranged in the second chamber is connected with a thrust plate, and one end of the slag poking rod arranged in the second chamber is connected with the thrust plate.

[0012] Further, a packing shaft sleeve is arranged in the third sliding hole, and the outer wall of the slag poking rod is slidably attached to the inner wall of the packing shaft sleeve.

[0013] Further, the inner wall of the packing shaft sleeve is provided with a sealing packing, the outer wall of the sealing packing is connected with the inner wall of the packing shaft sleeve, and the inner wall of the sealing packing is slidably attached to the outer wall of the slag poking rod; the side of the thrust plate facing the third sliding hole is provided with a connecting rod, the end of the connecting rod facing the third sliding hole is recessed to form a connecting groove, and the end of the slag poking rod facing the thrust plate is protruded to form a connecting column, and the connecting column is assembled in the connecting groove.

[0014] Further, the first sliding hole is provided with a blowing ring on one side of the packing shaft sleeve, the blowing ring is provided with a blowing ring groove on one side of the first sliding hole, the blowing ring groove is connected with an external gas supply device through a gas inlet pipe, the diameter of the first sliding hole gradually expands from the middle part to the end part connected with the blowing ring to form a horn mouth, and the blowing ring groove is in alignment and communication with the horn mouth.

[0015] Further, the slag poking rod and the first sliding hole are provided as two or more.

[0016] Compared with the prior art, the utility model has at least one of the following beneficial effects: 1. through the cooperation of the driving assembly and the push rod, the slag poking rod can reciprocate in the first sliding hole, so that the end part of the slag poking rod reciprocates and inserts into the inside of the slag pipe cone, the ash and slag moving to the coal pipe cone section are in a loose state, and blockage is avoided, and for the blocked condition, the slag poking rod can also be inserted multiple times to achieve the dredging effect; 2. through the setting of the heat insulation cavity, the heat insulation cavity is used as the connecting space of the slag poking rod and the push rod, and the slag poking rod and the carried leaked fine ash only enter the heat insulation cavity and do not enter the driving cavity, so that the high-temperature slag poking rod and the carried leaked fine ash have little influence on the driving cavity, and the driving assembly is prevented from being heated and jammed. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a slag pipe schematic view.

[0018] Figure 2 It is a side sectional view of the automatic dredging device for the slag pipe cone section.

[0019] Figure 3 It is Figure 2 It is a local enlarged schematic view at the middle mark A.

[0020] Figure 4 It is a driving cavity schematic view of the automatic dredging device for the slag pipe cone section.

[0021] Figure legend: 1-device body, 2-slag pipe cone section, 3-heat insulation cavity, 4-driving cavity, 5-first sliding hole, 6-second sliding hole, 7-slag poking rod, 8-push rod, 9-screw rod, 10-rubber buffer block, 11-driving motor, 12-driving nut, 13-driving plate, 14-connection bolt, 15-baffle, 16-first chamber, 17-second chamber, 18-third sliding hole, 19-thrust plate, 20-packing shaft sleeve, 22-blowing ring, 23-blowing ring groove, 24-gas inlet pipe, 25-horn mouth, 26-sealing packing, 27-connection rod, 28-connection groove, 29-connection column, 30-rubber buffer block. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples.

[0023] Figures 2 to 4 The utility model discloses an embodiment.

[0024] Embodiment:

[0025] A kind of automatic dredging device of slag pipe taper section, including installation on the side surface of slag pipe taper section 2 device body 1, device body 1 is spaced apart and is provided with heat insulation cavity 3 and drive cavity 4, heat insulation cavity 3 is communicated by first sliding hole 5 and the inside of slag pipe taper section 2, the cavity wall of first sliding hole 5 side relative to heat insulation cavity 3 is connected with drive cavity 4 by second sliding hole 6, first sliding hole 5 and second sliding hole 6 are arranged in parallel, push slag rod 7 is slidably arranged in first sliding hole 5, push rod 8 is slidably arranged in second sliding hole 6, push rod 8 is connected in drive cavity 4 and drive assembly is arranged for driving push rod 8 reciprocating motion along second sliding hole 6 in heat insulation cavity 3 and push slag rod 7 transmission, by drive assembly and push rod 8 cooperation, push slag rod 7 can be driven to reciprocating motion in first sliding hole 5, so that the end of push slag rod 7 reciprocating stabs the inner wall of slag pipe taper section 2, can make the ash and slag that move to coal pipe taper section be in loose state, avoid happening jam, for the situation that has been jammed, also can play dredging effect by the multiple stabs of push slag rod 7. By setting heat insulation cavity 3, as the connecting space of push slag rod 7 and push rod 8, push slag rod 7 and carry only the fine ash of leakage into heat insulation cavity 3 will not enter drive cavity 4, so that high temperature push slag rod 7 and carry the leakage of fine ash to drive cavity 4 less, avoid drive assembly heating and jam.

[0026] The driving assembly comprises a lead screw 9, a driving nut 12 and a rubber buffer block 10, two sets of the second sliding hole 6 and the push rod 8 are matched, the lead screw 9 is parallel to the push rod 8 and is arranged in the driving cavity 4, one end of the lead screw 9 is rotationally connected to the cavity wall of the driving cavity 4, the other end of the lead screw 9 penetrates the driving cavity 4, the driving motor 11 is connected to the outside of the device body 1, the driving nut 12 is threadedly matched and arranged on the lead screw 9, the rubber buffer block 10 is connected to the driving nut 12, and one end of each of the two push rods 8 arranged in the driving cavity 4 is connected to the rubber buffer block 10. In this way, when the driving motor 11 is started, the driving motor 11 drives the lead screw 9 to rotate in the driving cavity 4 through the shaft coupling or other transmission connecting piece, when the lead screw 9 rotates, the driving nut 12 and the rubber buffer block 10 are threadedly connected, and the rubber buffer block 10 cannot rotate with the lead screw 9 due to the restriction of the two push rods 8, so that the rubber buffer block 10 moves 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, and the rubber buffer block 10 can avoid the hard collision between the driving nut 12 and the front and rear ends of the driving cavity.

[0027] The driving plate 13 is arranged around the rubber buffer block 10, and one end of the push rod 8 arranged in the driving cavity 4 is connected to the driving plate 13 through the connecting bolt 14. The driving plate 13 can be used as a transfer station for connecting the driving nut 12, the rubber buffer block 10 and the push rod 8, and can better drive the push rod 8 to move. The connecting bolt 14 can stably connect the push rod 8 and the driving plate 13 together. The rubber buffer block 10 is clamped between the driving plate 13 and the driving nut 12 and is connected through the mounting bolt, so that the rubber buffer block 10 can be used as a buffer component between the driving plate 13 and the driving nut 12 when the slag poking rod 7 works, and the rubber buffer block 10 can play a buffering role.

[0028] The heat insulation cavity 3 is divided into a first chamber 16 and a second chamber 17 by a vertically arranged partition plate 15 between the first sliding hole 5 and the second sliding hole 6, the first chamber 16 is in communication with the inside of the slag chute cone section 2 through the first sliding hole 5, the second chamber 17 is in communication with the driving cavity 4 through the second sliding hole 6, the third sliding hole 18 in communication with the first chamber 16 and the second chamber 17 is arranged on the partition plate 15, and the third sliding hole 18 is aligned with the first sliding hole 5, one end of the slag poking rod 7 is arranged in the slag chute cone section 2, the other end sequentially passes through the first sliding hole 5 and the third sliding hole 18 and is in transmission connection with the pushing rod 8 in the second chamber 17. By arranging the partition plate 15, the heat insulation cavity 3 can be better divided into two temperature area chambers, i.e. the first chamber 16 and the second chamber 17. Among them, in the moving process of the slag poking rod 7, the slag poking rod 7 is always in the first chamber 16, the first chamber 16 has high temperature and much dust accumulation. In the moving process of the slag poking rod 7, the length of the slag poking rod 7 in the second chamber 17 changes with the movement of the slag poking rod 7, and the temperature of the slag poking rod 7 in the second chamber 17 is lower than that in the slag chute cone section 2, and the slag poking rod 7 has more dust accumulation, thereby avoiding the jamming of the pushing rod 8.

[0029] The pushing rod 8 is connected with a thrust plate 19 at one end arranged in the second chamber 17, and the slag poking rod 7 is connected with the thrust plate 19 at one end arranged in the second chamber 17. By arranging the thrust plate 19, the thrust plate 19 can be used as a connecting piece between the pushing rod 8 and the slag poking rod 7 to drive the slag poking rod 7 to reciprocate.

[0030] A packing shaft sleeve 20 is arranged in the third sliding hole 18, and the outer wall of the slag poking rod 7 is in sliding fit with the inner wall of the packing shaft sleeve 20. By arranging the packing shaft sleeve 20, the slag poking rod 7 can be well guided to smoothly perform linear motion in the use process.

[0031] The first sliding hole 5 is provided with a blowing ring 22 on the side facing the packing sleeve 20. The blowing ring 22 is provided with a blowing ring groove 23 on the side facing the first sliding hole 5. The blowing ring groove 23 is connected with an external air supply device through an air inlet pipe 24. The diameter of the first sliding hole 5 gradually increases from the middle part to the end part connected with the blowing ring 22 to form a bell mouth 25. The blowing ring groove 23 is in alignment with the bell mouth 25. The diameter of the first sliding hole 5 is larger than the diameter of the slag poking rod 7. With the blowing ring 22, the surface of the slag poking rod 7 can be blown and air sealed to avoid the slag poking rod 7 from bringing too much ash into the first chamber 16 during the reciprocating movement, causing the first chamber 16 to accumulate ash. At the same time, the surface of the slag poking rod 7 can be cooled by the low-temperature air during the reciprocating movement of the slag poking rod 7, 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 blowing ring groove 23 through the air inlet pipe 24. The air in the blowing ring groove 23 enters the first sliding hole 5 through the bell mouth 25 and enters the inside of the slag falling pipe taper section 2 along the first sliding hole 5. The surface of the slag poking rod 7 can be blown during the air flow.

[0032] The inner wall of the packing shaft sleeve 20 is provided with a sealing packing 26, the outer wall of the sealing packing 26 is connected with the inner wall of the packing shaft sleeve 20, and the inner wall of the sealing packing 26 is in sliding fit with the outer wall of the slag poking rod 7; the side of the thrust plate 19 facing the third sliding hole 18 is provided with a connecting rod 27, the end of the connecting rod 27 facing the third sliding hole 18 is recessed and provided with a connecting groove 28, the end of the slag poking rod 7 facing the thrust plate 19 is protruded and formed with a connecting column 29, and the connecting column 29 is assembled into the connecting groove 28. By arranging the sealing packing 26, the surface of the slag poking rod 7 can be cleaned when the slag poking rod 7 reciprocates, so that the residual ash in the surface of the slag poking rod 7 can be prevented from entering the second cavity 17. By arranging the connecting rod 27, the connecting rod 27 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 the dredging into the slag falling pipe cone section 2, the connecting rod 27 can be made of a low-thermal-conductivity material, so that the heat of the slag poking rod 7 can be effectively transferred to the thrust plate 19. By the connecting column 29 and the connecting groove 28, the connecting rod 27 and the thrust plate 19 can be well connected. The connecting column 29 and the connecting groove 28 can be screw-connected, so that the connecting column 29 and the connecting groove 28 can be easily disassembled and replaced. By means of the packing shaft sleeve 20 and the sealing packing 26, the slag poking rod 7 is not directly in contact with the third sliding hole 18, so that the third sliding hole 18 is not abraded. After the slag poking rod 7 is used for a long time, if the sealing packing 26 is abraded, the sealing packing 26 can be disassembled and replaced. The thrust plate 19 is provided with two thrust plates 19, the other thrust plate 19 is arranged in parallel at intervals, aligned mounting holes are arranged on the two thrust plates 19, the two thrust plates 19 are connected through a communication pipe, the two ends of the communication pipe are respectively aligned and communicated with the mounting holes on the two thrust plates 19, and the outer wall of the end of the connecting rod 27 away from the slag poking rod 7 is mounted in the two communication holes and the communication pipe. Such an arrangement can improve the stability and firmness of the installation of the connecting rod 27

[0033] The slag poking rod 7 and the first sliding hole 5 are provided with two or more than two. As shown in the figure, Figure 2 The slag poking rod 7 can be provided with three, so that the dredging efficiency and effect can be improved by simultaneously dredging multiple positions in the slag falling pipe cone section 2.

[0034] Although the utility model has been described herein with reference to a number of explanatory embodiments of the utility model, it should be understood that those skilled in the art can design many other modifications and embodiments, which will fall within the scope and spirit of the disclosure of the present application. More specifically, within the scope of the disclosure, drawings and claims of the present application, various modifications and improvements can be made to the constituent components and / or layout of the subject combination layout. In addition to the modifications and improvements to the constituent components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. An automatic unblocking device for a cone section of a slag discharge pipe, characterized in that, The device includes a device body (1) installed on the side of the slag discharge pipe cone section (2). The device body (1) is provided with a heat insulation cavity (3) and a drive cavity (4) at intervals. The heat insulation cavity (3) is connected to the inside of the slag discharge pipe cone section (2) through a first sliding hole (5). The cavity wall of the heat insulation cavity (3) on the side opposite to the first sliding hole (5) is connected to the drive cavity (4) through a second sliding hole (6). The first sliding hole (5) and the second sliding hole (6) are arranged in parallel. A slag-pumping rod (7) is slidably arranged in the first sliding hole (5). A push rod (8) is slidably arranged in the second sliding hole (6). The push rod (8) is connected to the slag-pumping rod (7) in the heat insulation cavity (3). A drive assembly for driving the push rod (8) to reciprocate along the second sliding hole (6) is provided in the drive cavity (4).

2. The automatic unblocking device for the cone section of a slag-falling pipe according to claim 1, characterized in that: The drive assembly includes a lead screw (9), a drive nut (12), and a rubber buffer block (10). The second sliding hole (6) and the push rod (8) are provided in pairs. The lead screw (9) and the push rod (8) are arranged parallel to each other 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 fitted onto the lead screw (9). The rubber buffer block (10) is connected to the drive nut (12). One end of each of the two push rods (8) placed in the drive cavity (4) is connected to the rubber buffer block (10).

3. The automatic unblocking device for the cone section of a slag-falling pipe according to claim 2, characterized in that: A drive plate (13) is provided around the rubber buffer block (10), and one end of the push rod (8) placed in the drive cavity (4) is connected to the drive plate (13) by a connecting bolt (14).

4. The automatic unblocking device for the cone section of a slag-falling pipe according to claim 1, characterized in that: The heat insulation cavity (3) is divided 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 discharge pipe cone section (2) through the first sliding hole (5). The second chamber (17) is connected to the drive cavity (4) through the second sliding hole (6). The partition (15) is provided with a third sliding hole (18) that connects the first chamber (16) and the second chamber (17). The third sliding hole (18) is aligned with the first sliding hole (5). One end of the slag-pumping rod (7) is placed inside the slag discharge 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).

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

6. The automatic unblocking device for the cone section of a slag-falling pipe according to claim 5, characterized in that: A packing sleeve (20) is installed in the third sliding hole (18), and the outer wall of the slag-pumping rod (7) slides and fits against the inner wall of the packing sleeve (20).

7. The automatic unblocking device for the cone section of a slag-falling pipe according to claim 6, characterized in that: The inner wall of the packing bushing (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 bushing (20), and the inner wall of the sealing packing (26) is slidably fitted with the outer wall of the slag-pumping 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 protruded at the end of the slag-pumping rod (7) facing the thrust plate (19), and the connecting column (29) is assembled in the connecting groove (28).

8. The automatic unblocking device for the cone section of a slag-falling pipe according to claim 1, characterized in that: A purge ring (22) is installed on the side of the first sliding hole (5) facing the packing sleeve (20). The purge ring (22) is recessed on the side facing the first sliding hole (5) with a purge ring groove (23). 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 trumpet mouth (25). The purge ring groove (23) is aligned and connected to the trumpet mouth (25). The diameter of the first sliding hole (5) is larger than the diameter of the slag-purge rod (7).

9. The automatic unblocking device for the cone section of a slag-falling pipe according to claim 1, characterized in that: The slag-pumping rod (7) and the first sliding hole (5) are configured to be two or more.

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