Toothed plate vibration device for cleaning air pre-heater

Abstract

The invention discloses a vibration device, and particularly relates to a toothed plate vibration device for cleaning an air pre-heater, which comprises a transmission shaft and a support frame, and an eccentric wheel is arranged on the transmission shaft; the eccentric wheel is fixedly connected with the transmission shaft, and the inner circular ring face of the outer circumference of the eccentric wheel is slidably connected with the top face of the main shaft. A toothed plate is mounted on the main shaft; the reset assembly is installed between the main shaft and the supporting frame. When the device is used, the device is installed above heat exchange tubes of the air pre-heater, the toothed plates are inserted among the heat exchange tubes of the air pre-heater, the toothed plates continuously move up and down through rotation of the eccentric wheels, dust on the heat exchange tubes is cut off, the dust removal effect is better, and the device occupies a small space of a place outside a furnace and has better adaptability.

Description

Technical Field

[0001] The invention relates to the technical field of power equipment, in particular to a tooth plate vibration device for a cleaning air preheater. Background Art

[0002] In order to improve the thermal efficiency of the boiler and reduce the heat loss of flue gas, an air preheater is usually installed at the tail of the boiler. When the air preheater is working, dust will accumulate on its surface, which reduces the thermal efficiency of the air preheater and hinders the flow of flue gas. The accumulated dust is mostly a mixture of various components such as ammonium bisulfate and dust particles, and the heat exchange tubes of the air preheater are easily corroded and damaged. Therefore, it is necessary to clean the air preheater with dust cleaning equipment.

[0003] In the prior art, contact-type dust cleaning equipment mainly uses a driving mechanism to push and pull the dust cleaning elements on the dust cleaning mechanism to move back and forth between the heat exchange tubes of the air preheater to squeeze and peel off the dust accumulated on the heat exchange tubes. Some contact-type dust cleaning equipment is also equipped with a cylinder vibration device. The problems of this contact-type dust cleaning method are: (1) The air pipe of the cylinder vibration device is easy to rupture in a high temperature and high corrosion environment; (2) The service life of the cylinder is short, and the seal is prone to aging and failure; (3) The vibration frequency of the cylinder is difficult to adjust; (4) The installation space requirement of the cylinder vibration device is relatively high. Summary of the invention

[0004] In order to solve the above problems in the prior art, the present invention provides a tooth plate vibration device for a clean air preheater to solve the current technical problems.

[0005] The technical solution adopted by the present invention to solve its technical problem is: A toothed plate vibration device for a cleaning air preheater comprises: a transmission shaft and a support frame, wherein the transmission shaft is fixedly connected to an eccentric wheel, a driving shaft is slidably connected to the transmission shaft, and the outer edge of the eccentric wheel is slidably connected to the upper side surface of the main shaft of the vibration component; the reset component is installed between the main shaft and the support frame.

[0006] Preferably, a driving shaft is provided at the front end of the transmission shaft, and the driving shaft is inserted into a transmission hole in the middle of the transmission shaft to slide axially with the transmission shaft.

[0007] Preferably, the vibration assembly includes a main shaft, and an upper fixed seat and a lower fixed seat are arranged on the upper and lower sides of the main shaft, the upper fixed seat and the lower fixed seat are connected to each other, and a reset guide rod of the reset assembly is connected to the lower fixed seat, and the lower end of the reset guide rod passes through a second support plate, and the second support plate is arranged on the support frame.

[0008] Preferably, a toothed plate is mounted on the main shaft.

[0009] Preferably, the reset assembly comprises a reset guide rod, a reset spring is sleeved on the outer side of the reset guide rod, and the reset spring is arranged between the main shaft and the support frame.

[0010] Preferably, a bearing seat is provided on the support frame, a bearing is provided inside the bearing seat, and the transmission shaft passes through the bearing.

[0011] Preferably, the rear section of the drive shaft is a hexagonal column structure, and the transmission hole is an inner hexagonal hole.

[0012] Preferably, the drive shaft is connected to a drive device via a coupling, and the drive device is located outside the air preheater tube sheet.

[0013] The beneficial effects of the present invention are as follows: when in use, the present application is installed above the heat exchange tube of the air preheater, and the tooth plate is inserted between the heat exchange tubes of the air preheater. The present application causes the tooth plate to continuously move up and down through the rotation of the eccentric wheel, thereby shearing the dust on the heat exchange tube, and achieving a better cleaning effect. In addition, the present equipment occupies very little space outside the furnace and has better adaptability. At the same time, the drive shaft and the transmission shaft of the device are telescopically connected, so that variable distance transmission can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 2 is a schematic structural diagram of a tooth plate vibration device of a clean air preheater according to an embodiment of the present invention; Figure 2 2 is a schematic structural diagram of a tooth plate vibration device of a clean air preheater according to an embodiment of the present invention; Figure 3 2 is a schematic structural diagram of a tooth plate vibration device of a clean air preheater according to an embodiment of the present invention; Figure 4 2 is a schematic structural diagram of a tooth plate vibration device of a clean air preheater according to an embodiment of the present invention; Figure 5 It is a structural schematic diagram of a partial structure of a tooth plate vibration device of a clean air preheater according to an embodiment of the present invention; Figure 6 It is a structural schematic diagram of a partial structure of a tooth plate vibration device of a clean air preheater according to an embodiment of the present invention; Figure 7 It is a structural schematic diagram of a partial structure of a tooth plate vibration device of a clean air preheater according to an embodiment of the present invention. Description of Reference Numerals

[0015] exist Figure 1-Figure 7In the figure, the dust cleaning trolley 1-1; the main shaft 2-1; the bearing seat 2-2; the eccentric wheel 2-3; the clamping plate 2-4; the driving motor 2-5; the transmission shaft 2-6; the driving shaft 2-7; the supporting frame 2-8; the guide plate 2-9; the upper fixing seat 2-10; the lower fixing seat 2-11; the bolt 2-12; the reset guide rod 2-13; the spring 2-14; the second supporting plate 2-15; and the reset guide rod 2-16. DETAILED DESCRIPTION

[0016] 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.

[0017] The present invention provides a tooth plate vibration device for a cleaning air preheater, comprising: a bearing seat 2-2, a bearing structure, an eccentric wheel 2-3, a driving motor 2-5, a transmission shaft 2-6 and a driving shaft 2-7.

[0018] The bearing seat 2-2 is fixedly supported on the support frame 2-8, and the bearing structure is installed inside the bearing seat 2-2. The transmission shaft and the bearing structure on the support frame 2-8 match each other, and the transmission shaft is fixedly connected with the eccentric wheel 2-3, and the eccentric wheel 2-3 is supported on the main shaft 2-1 and matches with the main shaft 2-1. The driving motor 2-5 is located on the outside of the air preheater tube plate, and is connected to the driving shaft 2-7 through a coupling. The driving shaft 2-6 has a transmission hole, and the driving shaft 2-7 extends into the transmission hole and axially slides with the driving shaft 2-6; the front section of the driving shaft 2-7 is a cylindrical structure, and the rear section is a hexagonal structure, and the transmission hole is an inner hexagonal hole. The driving device can use the driving motor 2-5, or a hydraulic motor, an air motor, a rotary cylinder, etc.

[0019] The present application is also provided with a second support plate 2-15, a lower fixing seat 2-11, an upper fixing seat 2-10, a bolt 2-12, a reset guide rod 2-13, a reset spring 2-14, a reset guide rod 2-16 and a guide plate 2-9.

[0020] Among them, the support plate is supported on the support frame 2-8, the lower fixed seat 2-11 and the upper fixed seat 2-10 are respectively located on the lower and upper sides of the main shaft 2-1, and the upper fixed seat 2-10 and the lower fixed seat 2-11 are fixedly connected by bolts 2-12, so as to realize the connection between the upper fixed seat 2-10, the lower fixed seat 2-11 and the main shaft 2-1. The reset guide rod 2-13 is located at the lower side of the lower fixed seat 2-11 and is fixedly connected to the lower fixed seat 2-11, and the lower end of the reset guide rod 2-13 passes through the second support plate 2-15. The reset spring 2-14 is sleeved on the outer periphery of the reset guide rod 2-13 and is located between the second support plate 2-15 and the lower fixed seat 2-11. The reset guide rod 2-16 is located on the upper side of the upper fixed seat 2-10 and is fixedly connected to the upper fixed seat 2-10, one end of the guide plate 2-9 is fixedly connected to the upper side of the clamping plate 2-4, and the reset guide rod 2-16 passes through the guide plate 2-9 and slides with the guide plate 2-9.

[0021] When in use, the motor rotates to drive the eccentric wheel 2-3 to rotate. Every time the eccentric wheel 2-3 rotates one circle, it turns to the distal end of the eccentric section to press the main shaft 2-1 downward. The main shaft 2-1 slides down a distance along the U-shaped groove on the upper part of the clamping plate 2-4, and the reset spring 2-14 is compressed; then it turns to the proximal end of the eccentric section, and the main shaft 2-1 is extended and pushed by the reset spring 2-14, and slides upward along the U-shaped groove to reset. As a result, the main shaft 2-1 reciprocates up and down with the rotation of the motor. The movement distance is the eccentric distance of the eccentric section, and the frequency of the reciprocating motion is determined by the motor speed. In this way, several cleaning tooth plates fixed to the main shaft 2-1 reciprocate up and down with the rotation of the motor, and the saw teeth on them can cut the accumulated dust and break it off. The cutting stroke of the cleaning tooth plate on the accumulated dust can be set by setting the eccentric distance of the eccentric section, and the reciprocating cutting frequency and working cycle of the cleaning tooth plate can be adjusted by adjusting the start / stop / speed of the motor during use.

[0022] Optimally, the eccentric wheel 2-3 is fixed on the transmission shaft 2-6.

[0023] Optimally, the sliding transmission of the regular hexagonal shaft / hole can adopt non-circular cross-sections such as triangular prism cross-sections, star cross-sections, and elliptical cross-sections. A simpler method is to use a flat key or a spline.

[0024] Optimized, an anti-wear spacer is added between the main shaft 2-1 and the U-shaped groove to reduce wear and increase service life.

[0025] Optimally, the main shaft 2 - 1 is not limited to a cylinder.

[0026] The optimized outer edge surface of the eccentric section is in an arc shape, which increases the contact area with the main shaft 2-1 section and reduces wear.

[0027] Optimally, the eccentric section is composed of an inner eccentric section, a bearing, and an outer ring. The inner hole of the bearing is sleeved on the outer edge of the inner eccentric section, and the inner hole of the outer ring is sleeved on the outer ring of the bearing.

[0028] Optimally, the two monomers (eccentric wheels 2-3) are connected in series and driven by the same motor, and the main shaft 2-1 can perform synchronous or asynchronous up and down reciprocating motion.

[0029] When in use, the present application is installed above the heat exchange tube of the air preheater, and the toothed plate fixed at one end on the main shaft 2-1 is inserted between the heat exchange tubes of the air preheater. The present application causes the toothed plate to continuously move up and down through the rotation of the eccentric wheel 2-3, shearing the dust on the heat exchange tube, and achieving a better cleaning effect. The present device occupies very little space outside the furnace and has better adaptability; at the same time, the drive shaft 2-7 and the transmission shaft 2-6 of the present device are retractably connected, and variable distance transmission can be realized.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tooth plate vibration device for cleaning an air preheater, comprising: The transmission shaft and the support frame are characterized in that: the transmission shaft and the eccentric wheel are fixedly connected, the driving shaft is slidably connected to the transmission shaft, the outer edge of the eccentric wheel is slidably connected to the upper side of the main shaft of the vibration component; the reset component is installed between the main shaft and the support frame.

2. The tooth plate vibration device of the clean air preheater according to claim 1 is characterized in that: A driving shaft is arranged at the front end of the transmission shaft, and the driving shaft is inserted into a transmission hole in the middle of the transmission shaft and slidably cooperates with the axial direction of the transmission shaft.

3. The tooth plate vibration device of the clean air preheater according to claim 1 is characterized in that: The vibration assembly includes a main shaft, an upper fixed seat and a lower fixed seat are arranged on the upper and lower sides of the main shaft, the upper fixed seat and the lower fixed seat are connected to each other, a reset guide rod of the reset assembly is connected to the lower fixed seat, the lower end of the reset guide rod passes through a second support plate, and the second support plate is arranged on the support frame.

4. The tooth plate vibration device of the clean air preheater according to claim 1 is characterized in that: A toothed plate is mounted on the main shaft.

5. The tooth plate vibration device of the clean air preheater according to claim 1 is characterized in that: The reset assembly comprises a reset guide rod, a reset spring is sleeved on the outer side of the reset guide rod, and the reset spring is arranged between the main shaft and the support frame.

6. The tooth plate vibration device of the clean air preheater according to claim 1 is characterized in that: A bearing seat is arranged on the support frame, a bearing is arranged inside the bearing seat, and the transmission shaft passes through the bearing.

7. The tooth plate vibration device of the clean air preheater according to claim 6 is characterized in that: The rear section of the driving shaft is a hexagonal column structure, and the transmission hole is an inner hexagonal hole.

8. The tooth plate vibration device of the clean air preheater according to claim 6 is characterized in that: The driving shaft is connected to a driving device through a coupling, and the driving device is located outside the air preheater tube sheet.

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