Saw vibration ash removal device

Abstract

The utility model discloses an ash removal device, and particularly relates to a saw vibration ash removal device which comprises an ash removal trolley, the ash removal trolley is arranged on a track, a longitudinal driving device mounting seat is arranged on the ash removal trolley, a longitudinal driving device is arranged on the longitudinal driving device mounting seat, a main shaft is connected to the longitudinal driving device, and the main shaft is connected with a saw blade. And a comb plate is arranged on the main shaft. The high-temperature-resistant air cylinder is used for driving the comb teeth to move up and down, part of equipment parts are reduced, and equipment complexity is lowered. And meanwhile, stable output linear driving force is obtained during return stroke, and the situation that return stroke cannot be achieved due to blocking of viscous accumulated dust is avoided. An air cylinder piston rod accessory fisheye connector and a main shaft fixing block are connected with a main shaft, so that the ash deposition degree difference between pipe bundles of the air preheater during ash removal or the eccentric load and the transverse load on a piston rod caused by load eccentricity or non-parallelism due to the fact that air cylinders are asynchronous during driving of a plurality of air cylinders are absorbed; and the working stability and durability of the whole device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dust cleaning equipment, and particularly relates to a saw vibration dust cleaning device. Background Art

[0002] The mechanical dust cleaning device of an air preheater is a device that directly removes the dust and sediment accumulated between the heat exchange tubes of the air preheater by physical methods. At present, the mechanical dust cleaning device of the air preheater usually adopts a comb-tooth structure. The comb teeth are composed of multiple metal plates, which are mounted on the same support rod and extend into the gaps between the heat exchange tubes of the air preheater. Driven by a drive device outside the flue, the comb teeth reciprocate axially along the heat exchange tubes among the tube bundles of the air preheater, squeezing and removing the ash accumulated between the tubes. However, since the ash on the surface of the low-temperature section of the air preheater is mostly a mixture of ammonium sulfate and various dust particles, this mixture has strong viscosity. When the comb teeth move horizontally between the heat exchange tubes to clean the ash, the viscous ash easily adheres to the surface of the comb teeth and moves to the ends of the air preheater along with it, resulting in serious ash accumulation at both ends of the air preheater and the cleaning stroke of the dust cleaning equipment becoming shorter and shorter.

[0003] To solve the above problems, in a patented technology of an array drive device for a dust cleaning equipment proposed by our company previously (application number: 2023210671327), by using an air oscillator to drive the serrated comb teeth to perform high-frequency and small-amplitude reciprocating motions up and down, the drive device pushes the dust cleaning trolley, and the comb teeth vibrate up and down at high frequencies when moving horizontally between the heat exchange tubes, cutting and peeling the dust adhering to the surface of the tube bundles of the air preheater, avoiding the adhesion of viscous ash and improving the dust cleaning effect of the equipment at the same time. This kind of equipment that cleans ash by vibrating the comb teeth or saw teeth is generally called a saw vibration dust cleaning equipment.

[0004] The above patented technical solution of an array drive device for a dust cleaning equipment improves the dust cleaning effect of the equipment by making the comb teeth vibrate up and down at high frequencies. However, it is found that there are still the following deficiencies during the actual operation:

[0005] Due to carrying the comb teeth, the self-return mechanism of the air oscillator cannot return by relying on its own elasticity and a reset mechanism needs to be installed beside the comb teeth, increasing the complexity and maintenance difficulty of the equipment. In addition, when encountering highly viscous ash, the blockage encountered by the comb teeth is further aggravated. The return mechanism of the air oscillator and the installed reset mechanism are both elastic elements due to the high-temperature working conditions, and their return performance is limited, resulting in slow response or failure.

[0006] The reciprocating stroke of the air oscillator in the vertical direction is short. For ash with strong viscosity and high hardness, it cannot push the ash to generate sufficient displacement from top to bottom in the vertical direction, and thus cannot effectively remove the ash between the preheating tubes.

[0007] In the above-mentioned patented technical solution, the air source pipeline that provides power for the air oscillator increases the equipment installation steps (such as hole opening and sealing problems) and maintenance difficulty by penetrating into the air rod through a newly opened hole in the flue wall.

[0008] Therefore, there is an urgent need to invent a saw vibration dust cleaning device to solve the above problems. Utility Model Content

[0009] The present utility model provides a saw vibration dust cleaning device to solve the problems existing in the above-mentioned prior art.

[0010] The technical solution adopted by the present utility model to solve its technical problems is as follows:

[0011] The present utility model provides a saw vibration dust cleaning device, including: a dust cleaning trolley, the dust cleaning trolley is arranged on a track, a longitudinal driving device mounting seat is arranged on the dust cleaning trolley, a longitudinal driving device is arranged on the longitudinal driving device mounting seat, a main shaft is connected to the longitudinal driving device, and a comb tooth plate is arranged on the main shaft.

[0012] Preferably, the longitudinal driving device is a cylinder, the longitudinal driving device mounting seat is a cylinder mounting seat, and the main shaft is connected to the piston rod of the cylinder through a main shaft fixing block.

[0013] Preferably, a fish-eye joint is connected to the extending end of the piston rod of the cylinder. A groove is formed in the upper part of the main shaft fixing block, and symmetrical through holes are formed on both sides of the groove. The fish-eye joint extends into the groove, and a pin shaft passing through the two through holes is inserted into the through hole on the fish-eye joint and the through hole at the upper part of the groove of the main shaft fixing block.

[0014] Preferably, a telescopic protective cover is installed in the area between the front end cover of the cylinder block of the cylinder and the main shaft fixing block.

[0015] Preferably, the dust cleaning trolley is arranged in the boiler flue, a driving device is arranged outside the boiler flue, a push-pull rod penetrating the boiler flue wall is connected to the dust cleaning trolley, the push-pull rod is connected to the driving device, the cylinder is connected to an air source pipeline, and the air source pipeline penetrates through the hollow push-pull rod and is connected to an air source outside the boiler.

[0016] Preferably, the dust cleaning trolley is arranged in the boiler flue, a driving device is arranged outside the boiler flue, a push-pull rod penetrating the boiler flue wall is connected to the dust cleaning trolley, the push-pull rod is connected to the driving device, the push-pull rod is a hollow pipe, the push-pull rod includes two, one of the push-pull rods connects the air inlet of the cylinder and the air source pipeline, and the other push-pull rod connects the air outlet of the cylinder and the air source pipeline, and the air source pipeline is connected to an air source outside the boiler.

[0017] Preferably, a limit sleeve is fixed on the main shaft. A boss is arranged on the edge of the limit sleeve. The cross-section of the limit sleeve is concave. The limit sleeve is relatively slidably arranged in a slot of the side mounting plate of the cylinder mounting seat. The width of the slot is smaller than the diameter of the boss of the limit sleeve and larger than the diameter of the middle concave part of the limit sleeve. The width of the middle concave part of the limit sleeve is larger than the thickness of the side mounting plate of the cylinder mounting seat.

[0018] Preferably, a reset mechanism is arranged on the main shaft. The reset mechanism includes an upper hoop shaft seat, a lower hoop shaft seat and a support plate. The upper hoop shaft seat and the lower hoop shaft seat are clamped on the main shaft by threads. A guide rod is fixed on the lower hoop shaft seat. A reset spring is sleeved outside the guide rod. The reset spring is limited in the guide rod by the support plate. The support plate is fixed on the ash cleaning trolley.

[0019] Preferably, the ash cleaning trolley includes a front bridge, a rear bridge and a connecting rod connecting the front bridge and the rear bridge.

[0020] Preferably, the longitudinal driving device is a high-temperature resistant electric cylinder or a high-temperature resistant linear motor or a high-temperature resistant hydraulic cylinder.

[0021] The beneficial effects of the present utility model are as follows:

[0022] By using a high-temperature resistant cylinder to drive the comb teeth to move up and down, some equipment parts are reduced, and the complexity of the equipment is lowered. At the same time, a stable output linear driving force is obtained during the return stroke, avoiding the situation of being unable to return due to the blockage of viscous dust accumulation.

[0023] By connecting the main shaft with the fixed block of the main shaft through the fish-eye joint of the cylinder piston rod accessory, the difference in the dust accumulation degree between the air preheater tube bundles during ash cleaning is absorbed, or the eccentric load and lateral load generated by the eccentric load and non-parallelism of the load caused by the non-synchronization of multiple cylinders during driving are absorbed, improving the working stability and durability of the entire device.

[0024] Using the push-pull rod, the connecting piece between the out-of-furnace driving device and the in-furnace ash cleaning trolley, as the gas path penetrating inside and outside the furnace, there is no need to additionally open holes on the flue wall, reducing the equipment installation steps and the maintenance difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0026] Figure 1 is a schematic structural diagram of a partial structure of the saw vibration ash cleaning device according to an embodiment of the present utility model;

[0027] Figure 2 is a schematic structural diagram of the saw vibration ash cleaning device according to an embodiment of the present utility model;

[0028] Figure 3 This is another structural schematic diagram of the saw vibration dust cleaning device according to the embodiment of the present utility model.

[0029] Explanation of the reference numerals in the drawings:

[0030] In Figures 1 - 3 it, cylinder 1; reset mechanism 2; main shaft 3; comb tooth plate 4; cylinder mounting seat 5; dust cleaning trolley 6; main shaft fixing block 7; hoop shaft seat 8; guide rod 9; spring 10; support plate 11; roller 12; idler roller 13; hose clamp 14; protective cover 15; limit sleeve 16; ball eye joint 17; pin shaft 18; threaded element 19; side mounting plate of the cylinder mounting seat 20; anti - detachment roller assembly 21. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] The present utility model provides a saw vibration dust cleaning device, including: cylinder 1, cylinder mounting seat 5, main shaft 3, comb tooth plate 4, and dust cleaning trolley 6. The cylinder 1 is a high - temperature - resistant cylinder, the comb tooth plate 4 is a saw - toothed comb tooth plate, and the dust cleaning trolley 6 includes front and rear bridges and a connecting rod connecting the front and rear bridges.

[0033] The saw vibration dust cleaning device is arranged in the flue. The dust cleaning trolley 6 of the saw vibration dust cleaning device can slide on the track laid beside the air preheater, and the track is axially parallel to the air preheater tube bundle. The cylinder mounting seat 5 of the saw vibration dust cleaning device is installed on the front and rear bridges of the dust cleaning trolley 6. The cylinder 1 is installed on the cylinder mounting seat 5. The piston rod of the cylinder 1 passes through the through - hole of the upper - side mounting plate of the cylinder mounting seat 5 and extends into the cylinder mounting seat 5. The front end of the cylinder piston rod is connected with the main shaft 3. The main shaft 3 passes through the two - side mounting plates of the cylinder mounting seat 5 and is perpendicular to the air preheater tube bundle. One end of the comb tooth plate 4 extends into the gap between the heat exchange tubes of the air preheater, and the other end is hung on the main shaft 3.

[0034] Principle: The external driving device drives the ash cleaning trolley 6 of the saw vibration ash cleaning device in the flue to reciprocate axially along the tube bundle of the air preheater through a push-pull rod. The cylinder 1 installed on the cylinder mounting seat 5 moves synchronously with the ash cleaning trolley 6. While the ash cleaning trolley 6 reciprocates, the piston rod of the cylinder 1 drives the main shaft 3 and the comb tooth plate 4 to perform reciprocating up and down movements. While the comb teeth translate and extrude to peel off the accumulated ash between the heat exchange tubes of the air preheater, the accumulated ash and scale between the tube bundles are sawed up and down significantly. Since the stroke of the cylinder 1 is long and it can continuously and smoothly output a linear driving force, it avoids the inability to return due to the blockage of viscous accumulated ash. At the same time, the large-amplitude up and down movement enables the serrated comb teeth to deeply penetrate the accumulated ash layer, effectively breaking its structure, thus significantly enhancing the ash cleaning efficiency.

[0035] A connection method between the cylinder 1 and the main shaft 3: The connecting accessory at the extending end of the piston rod of the cylinder 1 uses a fish-eye joint 17. A groove is opened at the upper part of the main shaft fixing block 7, and symmetrical through holes are opened on both sides of the groove. The fish-eye joint 17 extends into the groove, and when the through holes of the fish-eye joint 17 are concentric with the through holes at the upper part of the groove of the main shaft fixing block 7, a pin shaft 18 is inserted for connection. A through hole is opened in the middle of the main shaft fixing block 7, and a flat seam is provided from the lower edge of this through hole to the lower table surface of the main shaft fixing block 7. Symmetrical through holes are opened on both sides of the flat seam, and a threaded element 19 is inserted through the through holes. After the main shaft 3 is installed in place through the through hole in the middle of the main shaft fixing block 7, the main shaft 3 is firmly locked by tightening the threaded element 19 at the lower part of the main shaft fixing block 7. Further, the connecting accessory at the extending end of the piston rod of the cylinder 1 can also use a Y-shaped joint or an I-shaped joint to connect with the main shaft fixing block 7; furthermore, the piston rod accessory joint and the main shaft fixing block 7 are directly changed to be connected through structural parts such as a floating joint or a spherical joint that have functions such as absorbing displacement, compensating for errors, and allowing freedom of movement changes. The purpose of this connection method is to make the main shaft 3 and the piston rod of the cylinder 1 be movably connected to absorb the difference in the degree of accumulated ash of the air preheater tube bundle parts during ash cleaning, or the eccentric load and lateral load generated by the piston rod due to the eccentricity or non-parallelism of the load caused by the non-synchronization of multiple cylinders 1 during driving, so as to improve the working stability and durability of the entire device.

[0036] Optimally, a telescopic protective cover 15 is installed in the area between the front end cover of the cylinder body of the cylinder 1 and the main shaft fixing block 7, and it is fastened with a hose clamp 14 to ensure tightness. This protective cover 15 is designed with a bellows structure, which can automatically extend as the piston rod extends, maintaining full coverage, effectively blocking the dust and particulate matter inside the flue from directly contacting the piston rod of the cylinder 1, thereby reducing the wear and pollution inside the cylinder 1 and extending the service life of the cylinder 1 and its seals.

[0037] Preferably, the gas source pipeline extends from one end of the push-pull rod, passes through the hollow push-pull rod, and extends out from the other end to be connected to the gas source outside the boiler. Or when using push-pull rods on both sides, the push-pull rod is directly used as a part of the gas source pipeline, with one side push-pull rod as the intake pipeline and the other side as the exhaust pipeline. There is no need to additionally drill holes in the flue wall.

[0038] Preferably, the main shaft 3 in the saw-vibration ash cleaning device is usually driven by one or more cylinders 1. The number of cylinders 1 on the front and rear bridge frames of a single ash cleaning trolley 6 is not necessarily the same, and the specific number needs to be determined according to the ash accumulation condition of the air preheater.

[0039] Optimally, in addition to using high-temperature-resistant cylinders 1, other high-temperature-resistant linear reciprocating drive devices can also be used as alternatives for the saw-vibration ash cleaning device. For example: high-temperature-resistant electric cylinders, high-temperature-resistant linear motors, high-temperature-resistant hydraulic cylinders, etc.

[0040] Preferably, the saw-vibration ash cleaning device is provided with a guiding mechanism. A limit sleeve 16 is fixed on the main shaft 3. The cross-section of the limit sleeve 16 is concave, with both sides higher than the middle part. The limit sleeve 16 is installed at the position of the grooved opening on the side mounting plate 20 of the cylinder mounting seat. The short axis length of the grooved hole is smaller than the diameter of the boss of the limit sleeve 16 and slightly larger than the diameter of the middle part of the limit sleeve 16. The distance between the inner surfaces of the two bosses is greater than the thickness of the side mounting plate 20 of the cylinder mounting seat, so that the middle part of the limit sleeve 16 is clamped into the grooved opening and slides in the grooved hole as the main shaft 3 moves up and down.

[0041] Preferably, a reset mechanism 2 is provided on the saw-vibration device, including a spring 10, a guide rod, upper and lower hoop shaft seats 8, and a support plate 11. The upper and lower hoop shaft seats 8 are clamped on the main shaft 3 by threads. A guide rod 9 is fixed on the lower hoop shaft seat 8. A reset spring 10 is sleeved outside the guide rod 9. The spring 10 is limited in the guide rod 9 by the support plate 11, and the support plate 11 is fixed on the ash cleaning trolley 6. Further, a fixing plate is installed on the cylinder mounting seat 5. The fixing plate is provided with a through hole, and the guide rod 9 passes through the through hole. One end of the guide rod 9 is fixed on the main shaft 3, and the other end is fixed with a support plate 11. The spring 10 is sleeved on the guide rod 9 and is located between the adjacent surfaces of the fixing plate and the support plate 11. When the main shaft 3 moves downward, the position of the fixing plate remains unchanged, and the support plate 11 moves downward with the main shaft 3 to compress the spring 10.

[0042] The comb teeth are driven by the cylinder 1. By controlling the air pressure switching of the two side air ports of the cylinder 1, the piston can continuously reciprocate in two directions without additional reset force. There is no need to install a reset mechanism 2, which reduces the equipment complexity and maintenance difficulty. Moreover, the return stroke ability of the cylinder 1 can be adjusted by controlling the air pressure, and it can continuously and smoothly output linear driving force, avoiding the inability to return due to the blockage of viscous ash accumulation.

[0043] The long stroke of cylinder 1 enables the comb teeth to saw the ash and scale between the tube bundles up and down significantly. At the same time, the large-amplitude up-and-down movement enables the serrated comb teeth to penetrate deep into the ash layer, effectively breaking its structure, thus significantly enhancing the ash cleaning efficiency.

[0044] Using the original push-pull rod as the gas path penetrating inside and outside the furnace eliminates the need to additionally drill holes in the flue wall, reducing the equipment installation steps and the maintenance difficulty.

[0045] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A saw vibration dust cleaning device, comprising: The dust cleaning trolley is characterized in that: the dust cleaning trolley is set on a track, a longitudinal drive device mounting seat is provided on the dust cleaning trolley, a longitudinal drive device is provided on the longitudinal drive device mounting seat, a main shaft is connected to the longitudinal drive device, and a comb plate is provided on the main shaft; the longitudinal drive device is a cylinder, the longitudinal drive device mounting seat is a cylinder mounting seat, and the main shaft is connected to the piston rod of the cylinder through a main shaft fixing block.

2. The sawing vibration dust cleaning device according to claim 1, characterized in that: The protruding end of the piston rod of the cylinder is connected with a fisheye joint, a groove is provided on the upper part of the spindle fixing block, symmetrical through holes are provided on both sides of the groove, the fisheye joint extends into the groove, and a pin shaft passing through the two through holes is inserted into the through hole on the fisheye joint and the through hole in the groove on the upper part of the spindle fixing block.

3. The sawing vibration dust cleaning device according to claim 1, characterized in that: A retractable protective cover is installed in the area between the front end cover of the cylinder body of the cylinder and the main shaft fixing block.

4. The saw vibration dust cleaning device according to claim 1, characterized in that: The cleaning trolley is arranged in the boiler flue, and a driving device is arranged outside the boiler flue. The cleaning trolley is connected to a push-pull rod that penetrates the boiler flue wall, and the push-pull rod is connected to the driving device. The cylinder is connected to the air source pipeline, and the air source pipeline penetrates the hollow push-pull rod to connect to the air source outside the boiler.

5. The sawing vibration dust cleaning device according to claim 1, characterized in that: The cleaning trolley is arranged in the boiler flue, and a driving device is arranged outside the boiler flue. The cleaning trolley is connected with a push-pull rod that penetrates the boiler flue wall, and the push-pull rod is connected to the driving device. The push-pull rod is a hollow tube, and the push-pull rod includes two push-pull rods, one of which connects the cylinder air inlet and the air source pipeline, and the other push-pull rod connects the cylinder air outlet and the air source pipeline, and the air source pipeline is connected to the air source outside the boiler.

6. The saw vibration dust cleaning device according to claim 1, characterized in that: A limiting sleeve is fixed on the main shaft, a boss is provided on the edge of the limiting sleeve, the cross-section of the limiting sleeve is concave, the limiting sleeve is relatively slidably arranged in the slot hole of the side mounting plate of the cylinder mounting seat, the width of the slot hole is smaller than the diameter of the boss of the limiting sleeve and larger than the diameter of the middle recessed part of the limiting sleeve, and the width of the middle recessed part of the limiting sleeve is larger than the thickness of the side mounting plate of the cylinder mounting seat.

7. The saw vibration dust cleaning device according to claim 1, characterized in that: A reset mechanism is provided on the main shaft, and the reset mechanism includes an upper hoop shaft seat, a lower hoop shaft seat and a support plate. The upper hoop shaft seat and the lower hoop shaft seat are clamped on the main shaft by threads, and a guide rod is fixed on the lower hoop shaft seat. A reset spring is sleeved on the outer side of the guide rod. The reset spring is limited in the guide rod by the support plate, and the support plate is fixed on the cleaning trolley.

8. The saw vibration dust cleaning device according to claim 1, characterized in that: The dust cleaning trolley comprises a front axle frame, a rear axle frame and a connecting rod connecting the front axle frame and the rear axle frame.

9. The saw vibration dust cleaning device according to claim 1, characterized in that: The longitudinal driving device is a high temperature resistant electric cylinder, a high temperature resistant linear motor or a high temperature resistant hydraulic cylinder.

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