Cathode rapping device for high temperature electrostatic precipitator

Abstract

The present invention relates to the technical field of electrostatic precipitators, and in particular to a cathode rapping device for a high-temperature electrostatic precipitator, comprising a reduction motor and an insulator shaft, wherein one end of the insulator shaft is connected to the power output end of the reduction motor, and the other end is connected to a rapping shaft in a transmission manner; the rapping shaft comprises a first shaft, a second shaft and a third shaft which are sequentially arranged in a direction away from the insulator shaft, and a gap is provided between the ends of the first shaft and the second shaft, and between the ends of the second shaft and the third shaft; the shaft bodies of the first shaft, the second shaft and the third shaft are provided with short arms which are arranged at intervals along their length directions, and the suspended ends of the short arms are connected to a rapping hammer via a pin shaft; the present invention splits the rapping shaft into a multi-section structure, and provides gaps at adjacent ends of the multi-section structure, thereby effectively avoiding the extrusion displacement caused by the expansion of the rapping shaft due to thermal expansion and contraction, and ensuring the stability of the cathode rapping transmission mechanism during the rapping process.

Description

Technical Field

[0001] The invention relates to the technical field of electrostatic precipitator, and in particular to a cathode rapping device for a high-temperature electrostatic precipitator. Background Art

[0002] Electrostatic precipitator is a device that captures dust in flue gas by electrostatic purification. It is an ideal equipment for purifying industrial waste gas. Its purification work is mainly completed by the two systems of discharge electrode and precipitation electrode. When high voltage direct current is input between the two electrodes, anions and cations are generated in the electrode space and act on the surface of waste gas particles passing through the electrostatic field, so that they move to the electrode with opposite polarity under the action of the electric field force and settle on the electrode to achieve the purpose of dust collection. Both electrode systems have a vibration device. When the vibration hammer periodically hits the two-electrode system, the dust adhering to the electrode is shaken off, falls into the lower ash hopper and is discharged from the body through the ash discharge device. The purified waste gas is discharged into the atmosphere through the chimney from the outlet, thus completing the purification of the flue gas.

[0003] At present, the rapping devices suitable for electrostatic precipitators include an electromagnetic hammer top rapping device and a reduction motor lateral transmission side rapping device; among them, the reduction motor lateral transmission side rapping device has defects such as uneven transmission of rapping acceleration and lateral shear force. In addition, under high temperature conditions, due to the influence of thermal expansion and contraction of the system, it is difficult for the rapping hammer to align the impact center of the rapping rod, and the force effect of the rapping rod is poor, which affects the dust collection effect and service life of the equipment. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a cathode rapping device for a high-temperature electrostatic precipitator, which effectively avoids the extrusion displacement caused by the expansion of the rapping shaft due to thermal expansion and contraction in a high-temperature environment, thereby ensuring the stability of the cathode rapping device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A cathode rapping device for a high-temperature electrostatic precipitator, comprising:

[0007] A reduction motor, which is arranged outside the side wall of the electrostatic precipitator and is used to provide power;

[0008] An insulator shaft, one end of which is connected to the power output end of the reduction motor, and the other end of which is drivingly connected to a rapping shaft disposed inside the electrostatic precipitator;

[0009] Wherein, the rapping shaft comprises a first shaft, a second shaft and a third shaft which are sequentially arranged in a direction away from the electric porcelain shaft, the ends of the first shaft and the second shaft, and the ends of the second shaft and the third shaft are connected and fixed by a half coupling, and there is a gap between the ends of the first shaft and the second shaft, and between the ends of the second shaft and the third shaft;

[0010] The shaft bodies of the first shaft, the second shaft and the third shaft are provided with short arms arranged at intervals along the length direction thereof, and the suspension ends of the short arms are connected with rapping hammers through pin shafts.

[0011] In a further technical solution, the cathode rapping device further comprises:

[0012] A heat preservation box is fixed to the outside of the side wall of the electrostatic precipitator and sleeved on the insulator shaft.

[0013] In a further technical solution, a baffle plate arranged in parallel and spaced apart is provided on the inner side of the side wall, a through hole is provided on the baffle plate for the first shaft to pass through, a sealing ring is provided on the side of the through hole away from the side wall, a first washer is provided outside the sealing ring, an open pin is provided on the shaft body of the first shaft, a second washer is provided on the side of the open pin adjacent to the first washer, and a spring is provided between the first washer and the second washer.

[0014] In a further technical solution, the ends of the first shaft and the second shaft are respectively provided with first half couplings, and the outer edges of the first half couplings on the first shaft and the second shaft are locked and fixed by bolts;

[0015] The ends of the second shaft and the third shaft are respectively provided with second half couplings, and the outer edges of the second half couplings on the second shaft and the third shaft are connected and fixed by the third half coupling.

[0016] In a further technical solution, both ends of the insulator shaft are connected to the power output end of the reduction motor and the end of the first shaft respectively through universal couplings.

[0017] In a further technical solution, the first shaft, the second shaft and the third shaft are all supported by bearings installed on the bearing seat.

[0018] In a further technical solution, the cathode rapping device further includes a bracket fixed to the outside of the side wall and extending horizontally, and the reduction motor is fixed on the bracket.

[0019] In a further technical solution, an obliquely arranged supporting angle steel is provided between the bracket and the outside of the side wall.

[0020] Compared with the prior art, the present invention has the following technical effects:

[0021] The cathode rapping device for a high-temperature electrostatic precipitator provided by the present invention is divided into a multi-section structure by a rapping shaft, and gaps are arranged at adjacent ends of the multi-section structure. In this way, when used in a high-temperature environment, the extrusion displacement caused by the expansion of the rapping shaft due to thermal expansion and contraction can be effectively avoided, thereby ensuring the stability of the cathode rapping transmission mechanism during the rapping process.

[0022] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It shows a schematic structural diagram of a cathode rapping device for a high-temperature electrostatic precipitator provided according to a specific embodiment of the present invention;

[0024] Figure 2 Shown as Figure 1 A magnified schematic diagram of position A in the middle;

[0025] Figure 3 It is a schematic diagram showing the connection between the ends of the first shaft and the second shaft in the present invention;

[0026] Figure 4 It is a schematic diagram showing the connection between the ends of the second shaft and the third shaft in the present invention;

[0027] Explanation of numbers in the figure: 1-side wall, 2-bracket, 3-support angle steel, 4-rapping rod, 10-reduction motor, 20-ceramic shaft, 21-universal coupling, 30-rapping shaft, 301-bearing, 31-first shaft, 311-cotter pin, 32-second shaft, 33-third shaft, 34-short arm, 35-rapping hammer, 36-first half coupling, 37-bolt, 38-second half coupling, 39-third half coupling, 40-insulation box, 50-baffle, 51-sealing ring, 52-first gasket, 53-second gasket, 54-spring. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific drawings.

[0029] It should be noted that, in the present invention, when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0031] Combination Figure 1-4 As shown, the present invention provides a cathode rapping device for a high-temperature electrostatic precipitator, comprising a reduction motor 10 and an insulator shaft 20; wherein the reduction motor 10 is arranged outside the side wall 1 of the electrostatic precipitator for providing power, one end of the insulator shaft 20 is connected to the power output end of the reduction motor 10, and the other end is drivingly connected to a rapping shaft 30 arranged inside the electrostatic precipitator;

[0032] The rapping shaft 30 includes a first shaft 31, a second shaft 32 and a third shaft 33 which are arranged in sequence in a direction away from the insulator shaft 20, the ends of the first shaft 31 and the second shaft 32, and the ends of the second shaft 32 and the third shaft 33 are all connected and fixed by half-couplings, and there is a gap between the ends of the first shaft 31 and the second shaft 32, and between the ends of the second shaft 32 and the third shaft 33; the shafts of the first shaft 31, the second shaft 32 and the third shaft 33 are provided with short arms 34 arranged at intervals along their length direction, and the suspended ends of the short arms 34 are connected to a rapping hammer 35 through a pin.

[0033] In the technical solution provided by the present invention, the rapping shaft 30 is split into a first shaft 31, a second shaft 32 and a third shaft 33, and a gap is set between the ends of the first shaft 31 and the second shaft 32, and between the ends of the second shaft 32 and the third shaft 33; in this way, in a high-temperature use environment, the extrusion displacement of the rapping shaft caused by thermal expansion and contraction is effectively avoided, ensuring that the rapping hammer 35 can always face the impact center of the rapping rod 4, thereby improving the stability of the cathode rapping transmission mechanism during the rapping process.

[0034] In the present invention, the cathode rapping device further comprises a heat preservation box 40 , which is fixed to the outside of the electrostatic precipitator side wall 1 and sleeved on the insulator shaft 20 .

[0035] In the present invention, a baffle plate 50 arranged in parallel and spaced apart is provided on the inner side of the side wall 1, a through hole is provided on the baffle plate 50 for the first shaft 31 to pass through, a sealing ring 51 is provided on the side of the through hole away from the side wall 1, a first washer 52 is provided outside the sealing ring 51, a cotter pin 311 is provided on the shaft body of the first shaft 31, a second washer 53 is provided on the side of the cotter pin 311 adjacent to the first washer 52, and a spring 54 is provided between the first washer 52 and the second washer 53. The elastic force of the spring 54 causes the first washer 52 to be pressed against the sealing ring 51.

[0036] In the present invention, as a specific implementation of connecting the ends of the first shaft 31 and the second shaft 32, and connecting the ends of the second shaft 32 and the third shaft 33, the ends of the first shaft 31 and the second shaft 32 are respectively provided with first half-couplings 36, and the outer edges of the first half-couplings 36 on the first shaft 31 and the second shaft 32 are locked and fixed by bolts 37; the ends of the second shaft 32 and the third shaft 33 are respectively provided with second half-couplings 38, and the outer edges of the second half-couplings 38 on the second shaft 32 and the third shaft 33 are connected and fixed by a third half-coupling 39.

[0037] In the present invention, the end gap between the first shaft 31 and the second shaft 32, and the end gap between the second shaft 32 and the third shaft 33 can be selected within a wider range. In a specific embodiment of the present invention, the end spacing between the first shaft 31 and the second shaft 32 is 2 mm, and the end spacing between the second shaft 32 and the third shaft 33 is 20 mm.

[0038] In the present invention, the two ends of the insulator shaft 20 are respectively connected to the power output end of the reduction motor 10 and the end of the first shaft 31 through the universal coupling 21. The setting of the universal coupling 21 avoids the installation error causing the rotation center line of the rapping shaft 30 to be inconsistent with the rotation center line of the output shaft of the reduction motor 10, which affects the power transmission, and improves the stability of the equipment operation.

[0039] In the present invention, the first shaft 31, the second shaft 32 and the third shaft 33 are all supported by bearings 301 installed on the bearing seat.

[0040] In the present invention, the cathode rapping device further comprises a bracket 2 fixed to the outside of the side wall 1 and extending horizontally, and the reduction motor 10 is fixed to the bracket 2. Furthermore, in order to improve the stability of the bracket 2, an obliquely arranged support angle steel 3 is provided between the bracket 2 and the outside of the side wall 1.

[0041] The cathode rapping device provided by the present invention, in a specific working process, the power output end of the reduction motor 10 drives the rapping shaft 30 to rotate through the insulator shaft 20, thereby driving the short arm 34 on the rapping shaft 30 to swing, and the short arm 34 drives the rapping hammer 35 to rotate. When the rapping hammer 35 rotates to a vertical state, due to inertia and gravity, the rapping hammer 35 rotates and falls around the pin shaft between it and the short arm 34, rapping the rapping rod 4 fixed on the cathode top beam, causing the cathode line to vibrate, thereby achieving the purpose of cathode cleaning.

[0042] The above shows and describes the basic principles, main features and characteristics of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A cathode rapping device for a high-temperature electrostatic precipitator, characterized in that: include: a reduction motor (10), the reduction motor (10) being arranged outside the side wall (1) of the electrostatic precipitator and used for providing power; an insulator shaft (20), one end of the insulator shaft (20) being connected to the power output end of the reduction motor (10), and the other end of the insulator shaft (20) being drivingly connected to a rapping shaft (30) disposed inside the electrostatic precipitator; The rapping shaft (30) comprises a first shaft (31), a second shaft (32) and a third shaft (33) which are arranged in sequence in a direction away from the insulator shaft (20); the ends of the first shaft (31) and the second shaft (32), and the ends of the second shaft (32) and the third shaft (33) are connected and fixed by a half coupling, and there is a gap between the ends of the first shaft (31) and the second shaft (32), and between the ends of the second shaft (32) and the third shaft (33); The shaft bodies of the first shaft (31), the second shaft (32) and the third shaft (33) are provided with short arms (34) arranged at intervals along their length direction, and the suspended ends of the short arms (34) are connected to rapping hammers (35) via pins; A baffle (50) is provided on the inner side of the side wall (1) and arranged in parallel and spaced apart. A through hole is provided on the baffle (50) for the first shaft (31) to pass through. A sealing ring (51) is provided on the side of the through hole away from the side wall (1). A first gasket (52) is provided outside the sealing ring (51). A cotter pin (311) is provided on the shaft of the first shaft (31). A second gasket (53) is provided on the side of the cotter pin (311) adjacent to the first gasket (52), and a spring (54) is provided between the first gasket (52) and the second gasket (53). The elastic force of the spring 54 causes the first gasket 52 to be pressed against the sealing ring 51; The two ends of the insulator shaft (20) are respectively connected to the power output end of the reduction motor (10) and the end of the first shaft (31) through a universal coupling (21); Also includes: an insulation box (40), the insulation box (40) being fixed to the outside of the electrostatic precipitator side wall (1) and sleeved on the insulator shaft (20); The ends of the first shaft (31) and the second shaft (32) are respectively provided with first half couplings (36), and the outer edges of the first half couplings (36) on the first shaft (31) and the second shaft (32) are locked and fixed by bolts (37); The ends of the second shaft (32) and the third shaft (33) are respectively provided with second half couplings (38), and the outer edges of the second half couplings (38) on the second shaft (32) and the third shaft (33) are connected and fixed via a third half coupling (39); The first shaft (31), the second shaft (32) and the third shaft (33) are all supported by bearings (301) mounted on the bearing seat; It also includes a bracket (2) fixed to the outside of the side wall (1) and arranged to extend horizontally, and the reduction motor (10) is fixed on the bracket (2); An obliquely arranged supporting angle steel (3) is provided between the bracket (2) and the outside of the side wall (1).

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