A new type of sealing device for the hole of a rapping shaft of an electric dust collector

Abstract

The utility model discloses a novel sealing device of rapping shaft hole of electric dust collector, including electric dust collector casing, shaft seal mechanism, rapping shaft and electric porcelain insulation shaft, and the part of electric dust collector casing corresponding installation shaft seal mechanism is equipped with assembly hole, and shaft seal mechanism includes bearing seat, first sleeve, first insulating rubber bush, second sleeve, second insulating rubber bush, and the structure of second sleeve is identical with the structure of first sleeve, first insulating rubber bush and second insulating rubber bush are arranged respectively in the flue gas side and external environment side of rapping shaft through dust remover casing, improve the sealing reliability, and the helical projection of insulating rubber bush inner wall is closely contacted with rapping shaft surface, forms effective dynamic sealing, can allow the shaft smooth rotation, can greatly hinder the leakage of flue gas along the shaft surface, significantly improves the overall air tightness, can prolong the service life of equipment, reduces the failure risk simultaneously, provides better guarantee for the maintenance and long -term use of electric dust collector.

Description

Technical Field

[0001] This utility model relates to a novel sealing device for the rapping shaft hole of an electrostatic precipitator. Background Technology

[0002] An electrostatic precipitator (ESP) is an environmentally friendly device that uses electrostatics to separate and remove dust from industrial flue gas, thereby significantly reducing the amount of dust emitted into the atmosphere and improving air quality. For an ESP to perform stably and reliably, in addition to providing a stable and sustainable high-voltage discharge electric field, the proper functioning of its rapping device is also crucial. Dust passing through the high-voltage discharge electric field becomes charged. If charged dust adheres to the sealing plate and the porcelain insulating shaft, creepage can easily occur, affecting the performance of the ESP and even causing accidents. Therefore, the rapping device must be effective at cleaning dust, the porcelain insulating shaft must not adhere to dust or creep, and insulation and sealing must be reliable.

[0003] In conventional electrostatic precipitators, a circular hole is opened on the side wall of the casing for the high-voltage insulating ceramic shaft to pass through. If dust-laden gas enters the cathode insulation box and accumulates on the insulating ceramic shaft, a thick layer of dust will accumulate over time. When the dust reaches a certain thickness, it will reduce the insulation distance of the ceramic shaft, causing arcing discharge or even low-voltage breakdown, which is detrimental to reducing the risk of failure and extending the service life of the equipment. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a new sealing device for the rapping shaft hole of an electrostatic precipitator.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A novel sealing device for the rapping shaft hole of an electrostatic precipitator includes an electrostatic precipitator housing, a shaft sealing mechanism installed on the electrostatic precipitator housing, a rapping shaft installed through the shaft sealing mechanism, and an electric porcelain insulated shaft connected to the rapping shaft. The electrostatic precipitator housing has an assembly hole corresponding to the location where the shaft sealing mechanism is installed. The shaft sealing mechanism includes a bearing seat embedded in the assembly hole, a first sleeve located on one side of the electrostatic precipitator housing and pressing against the bearing seat, a first insulating sleeve embedded inside the first sleeve for covering the rapping shaft, a second sleeve located on the other side of the electrostatic precipitator housing and pressing against the bearing seat, and a second insulating sleeve embedded inside the second sleeve for covering the rapping shaft. The structure of the second sleeve is the same as that of the first sleeve.

[0007] Preferably, the first sleeve and the second sleeve are tightly attached to the electrostatic precipitator housing and are fixedly installed by bolts and nuts.

[0008] Preferably, the first sleeve has an insulating rubber sleeve insertion cavity inside.

[0009] Preferably, a circular groove is provided on the side of the first sleeve facing the electrostatic precipitator housing.

[0010] Preferably, the interior of the first insulating sleeve is provided with spiral protrusions.

[0011] Preferably, both the first insulating sleeve and the second insulating sleeve are made of polytetrafluoroethylene (PTFE).

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. A first insulating sleeve and a second insulating sleeve are respectively installed on the flue gas side and the external environment side where the rapping shaft passes through the dust collector housing, which improves the sealing reliability. Moreover, the spiral protrusions on the inner wall of the insulating sleeve are in close contact with the surface of the rapping shaft, forming an effective dynamic seal. This allows the shaft to rotate smoothly while greatly preventing the leakage of flue gas along the shaft surface, significantly improving the overall airtightness.

[0014] 2. The use of polytetrafluoroethylene (PTFE) material gives the sealing device superior performance under high temperature, low temperature and friction environments. The PTFE sleeve is not easy to soften or melt, and the performance of the sealing device remains stable even in harsh working environments, thereby greatly improving the service life and operational reliability of the electrostatic precipitator. In addition, the spiral protrusion design inside the first insulating sleeve, although it can contact the surface of the rapping shaft, will not increase excessive friction, ensuring that the rapping shaft can rotate smoothly, reducing the torque at startup, and improving the operating efficiency of the rapping shaft. Attached Figure Description

[0015] Figure 1 This is a structural diagram of a novel sealing device for the rapping shaft hole of an electrostatic precipitator according to the present invention;

[0016] Figure 2 for Figure 1 Exploded view;

[0017] Figure 3 for Figure 2 Structural diagram of the first sleeve;

[0018] Figure 4 for Figure 2 Structural diagram of the first insulating rubber sleeve;

[0019] Figure 5 for Figure 1 Cross-sectional view. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0021] Example

[0022] like Figure 1-5 As shown, a novel sealing device for the rapping shaft hole of an electrostatic precipitator includes an electrostatic precipitator housing 1, a shaft sealing mechanism 2 installed on the electrostatic precipitator housing 1, a rapping shaft 3 installed through the shaft sealing mechanism 2, and an electric porcelain insulating shaft 4 axially connected to the rapping shaft 3.

[0023] The electrostatic precipitator housing 1 has an assembly hole 11 at the location where the shaft sealing mechanism 2 is installed.

[0024] The shaft sealing mechanism 2 includes a bearing seat 21 fitted into the mounting hole 11, a first sleeve 22 located on one side of the electrostatic precipitator housing 1 and pressing against the bearing seat 21, a first insulating sleeve 23 fitted inside the first sleeve 22 for covering the vibrating shaft 3, a second sleeve 24 located on the other side of the electrostatic precipitator housing 1 and pressing against the bearing seat 21, and a second insulating sleeve 25 fitted inside the second sleeve 24 for covering the vibrating shaft 3.

[0025] The structure of the second sleeve 24 is the same as that of the first sleeve 22. The first sleeve 22 and the second sleeve 24 are tightly attached to the electrostatic precipitator housing 1 and are fixedly installed by bolts and nuts. The first sleeve 22 has an insulating sleeve insertion cavity 221 inside, which can be used to insert the first insulating sleeve 23 and prevent the first insulating sleeve 23 from falling out of the first sleeve 22. The first sleeve 22 has a circular groove 222 on the side facing the electrostatic precipitator housing 1, which can be used to insert the bearing seat 21, which is convenient for installing the bearing seat 21 on the electrostatic precipitator housing 1.

[0026] It should be further explained that the first insulating sleeve 23 can also be embedded inside the second sleeve 24, preventing the first insulating sleeve 23 from falling out of the first sleeve 22, and can cooperate with the mounting of the bearing seat 21, which is beneficial for the installation of the bearing seat 21 in the electrostatic precipitator housing 1.

[0027] The first insulating sleeve 23 has a spiral protrusion 231 inside. Specifically, the spiral protrusion can contact the surface of the vibrating shaft 3 without affecting the rotation of the vibrating shaft 3, and can effectively prevent the leakage of smoke and gas.

[0028] Both the first insulating sleeve 23 and the second insulating sleeve 25 are made of polytetrafluoroethylene (PTFE). Specifically, PTFE sleeves have outstanding performance in terms of high temperature resistance and abrasion resistance. They can work for a long time between -200℃ and +260℃, and their performance remains stable without softening or melting. Moreover, the resistance of the rapping shaft 3 is minimal when rotating inside the PTFE sleeve, and the rotation is very smooth and easy, significantly reducing the starting torque.

[0029] It should be further explained that a first insulating sleeve and a second insulating sleeve are respectively installed on the flue gas side and the external environment side where the rapping shaft passes through the dust collector housing, which improves the sealing reliability. Moreover, the spiral protrusions on the inner wall of the insulating sleeve are in close contact with the surface of the rapping shaft, forming an effective dynamic seal. This allows the shaft to rotate smoothly while greatly preventing the leakage of flue gas along the shaft surface, significantly improving the overall airtightness.

[0030] The above embodiments of this utility model are not intended to limit the scope of protection of this utility model. The implementation of this utility model is not limited thereto. All other modifications, substitutions or alterations made to the above structure of this utility model based on the above content of this utility model and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, shall fall within the scope of protection of this utility model.

Claims

1. A novel sealing device for the rapping shaft hole of an electrostatic precipitator, comprising an electrostatic precipitator housing, a shaft sealing mechanism mounted on the electrostatic precipitator housing, a rapping shaft installed through the shaft sealing mechanism, and an electric porcelain insulated shaft connected to the rapping shaft, wherein the electrostatic precipitator housing has an assembly hole corresponding to the location where the shaft sealing mechanism is installed, characterized in that, The shaft sealing mechanism includes a bearing housing fitted into an assembly hole, a first sleeve located on one side of the electrostatic precipitator housing and pressing against the bearing housing, a first insulating sleeve fitted inside the first sleeve for covering the rapping shaft, a second sleeve located on the other side of the electrostatic precipitator housing and pressing against the bearing housing, and a second insulating sleeve fitted inside the second sleeve for covering the rapping shaft. The structure of the second sleeve is the same as that of the first sleeve.

2. The novel sealing device for the vibrating shaft hole of an electrostatic precipitator according to claim 1, characterized in that, The first and second sleeves are tightly fitted against the electrostatic precipitator housing and are fixed in place by bolts and nuts.

3. The novel sealing device for the vibrating shaft hole of an electrostatic precipitator according to claim 1, characterized in that, The first sleeve has an insulating rubber sleeve insertion cavity inside.

4. The novel sealing device for the vibrating shaft hole of an electrostatic precipitator according to claim 1, characterized in that, A circular groove is provided on the side of the first sleeve facing the electrostatic precipitator housing.

5. The novel sealing device for the vibrating shaft hole of an electrostatic precipitator according to claim 1, characterized in that, The first insulating sleeve has spiral protrusions inside.

6. The novel sealing device for the vibrating shaft hole of an electrostatic precipitator according to claim 1, characterized in that, Both the first and second insulating sleeves are made of polytetrafluoroethylene (PTFE).

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