Rapping shaft sealing device for electrostatic precipitator

Abstract

The present invention relates to the technical field of rapping shaft sealing for electrostatic precipitators. Disclosed is a rapping shaft sealing device for an electrostatic precipitator. The rapping shaft sealing device comprises: an electrostatic precipitation assembly, which comprises an electrostatic precipitator housing and a rapping shaft body arranged on the electrostatic precipitator housing; an outer sealing assembly, which comprises a base mounted and arranged on the electrostatic precipitator housing, a sealing outer sleeve arranged on the base, and a sealing cavity formed in the sealing outer sleeve; and an inner sealing assembly, which comprises an inner sealing portion arranged in the sealing cavity and sealing rings arranged in a sleeved manner in the inner sealing portion, wherein the sealing rings are sleeved on the rapping shaft body, and a sealing medium is provided between the sealing outer sleeve and the inner sealing portion. The inner sealing portion is capable of rotating synchronously with the rapping shaft body by means of cooperation with the sealing rings and the rapping shaft body, the multiple stages of sealing rings are capable of blocking airflow between the sealing inner sleeve and the rapping shaft body, and the sealing medium and multiple stages of serpentine channels work together to form a seal, thereby isolating the passage of external air to the greatest extent.

Description

Sealing device for rapping shaft of electric dust collector TECHNICAL FIELD

[0001] The present application relates to the technical field of the sealing of the rapping shaft body of an electric dust collector, and particularly relates to a sealing device for the rapping shaft of an electric dust collector. BACKGROUND

[0002] An electric dust collector is a high-efficiency dust removal device for removing particulate matter from industrial exhaust gas, which achieves the purpose of purifying flue gas by capturing charged dust particles through the use of an electric field. The working principle is to make the dust particles charged by generating a strong electric field between two metal electrodes, and then to adsorb them on a dust collection plate, and then to remove the dust on the dust collection plate through a rapping device.

[0003] A vertical plate-type electric dust collector is generally equipped with a negative and positive rapping device to remove the dust attached to the electrode plate and electrode wire through the rapping device. The rapping shaft body of the existing rapping device generally uses felt sealing through the shaft hole of the electric dust collector shell. The felt sealing is only one layer, which will wear out after a period of operation, and cannot be replaced during the operation of the equipment. Since the inside of the dust collector is operated under negative pressure, after the sealing felt of the rapping shaft body is worn out, the outdoor air entering the inside of the electric dust collector through the hole of the rapping shaft body will cause corrosion around the shaft hole of the electric dust collector, increase the air leakage rate of the electric dust collector, and increase the oxygen concentration in the flue gas.

[0004] Therefore, there is an urgent need to propose a sealing device for the rapping shaft of an electric dust collector.

[0005] SUMMARY

[0006] This section is intended to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification of the present application in order to avoid obscuring the purpose of this section, the abstract and the title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0007] In view of the above-mentioned problems of the existing sealing device for the rapping shaft of an electric dust collector, the present application is proposed.

[0008] To solve the above-mentioned technical problems, the present application provides the following technical solutions: a sealing device for the rapping shaft of an electric dust collector, comprising,

[0009] An electric dust removal assembly, comprising an electric dust collector shell and a rapping shaft body arranged on the electric dust collector shell;

[0010] An outer sealing assembly, comprising a base arranged on the electric dust collector shell, a sealing sleeve arranged on the base, and a sealing cavity formed in the sealing sleeve;

[0011] An inner sealing assembly comprises an inner sealing part arranged in the sealing cavity, and a sealing ring arranged in the inner sealing part in a sleeving manner;

[0012] The sealing ring is sleeved on the rapping shaft body, the rapping shaft body passes through the outer sealing assembly, and a sealing medium is arranged between the sealing sleeve and the inner sealing part.

[0013] As a preferred scheme of the electric dust collector rapping shaft sealing device, the inner sealing part comprises a sealing sleeve sleeved on the rapping shaft body, a fixing pin arranged on the sealing sleeve, and a friction disc I arranged on the fixing pin.

[0014] The inner side of the sealing sleeve is provided with a sealing inner groove, the rapping shaft body passes through the sealing inner groove, and the sealing ring is located at the inner side of the sealing inner groove.

[0015] One side of the friction disc I inside the sealing inner groove is provided with a protrusion, and the protrusion is sleeved on the sealing sleeve.

[0016] The sealing inner groove is provided with a clamping groove, the sealing ring is tightly fitted in the clamping groove, and the sealing sleeve can move synchronously with the rapping shaft body through the clamping groove and the sealing ring.

[0017] As a preferred scheme of the electric dust collector rapping shaft sealing device, the sealing cavity comprises a movable area I, a sealing area adjacent to the movable area I, and a movable area II adjacent to the sealing area.

[0018] The movable area I is adjacent to the base.

[0019] As a preferred scheme of the electric dust collector rapping shaft sealing device, the sealing sleeve comprises a clamping section connected with the friction disc I, a connecting section adjacent to the clamping section, and an abutting section adjacent to the connecting section.

[0020] The clamping section is located in the movable area I, the abutting section is located in the movable area II, and the radius of the circumferential surface of the connecting section is smaller than the radius of the circumferential surface of the connecting section and the abutting section.

[0021] As a preferred scheme of the electric dust collector rapping shaft sealing device, the inner wall of the sealing sleeve is fixedly provided with a protruding ring I, the outer wall of the connecting section is fixedly provided with a protruding ring II, and the protruding ring I and the protruding ring II are located in the sealing area.

[0022] As a preferred scheme of the electric dust collector rapping shaft sealing device, one side of the convex circle one opposite to the convex circle two is provided with a convex platform one, one side of the convex circle two opposite to the convex circle one is provided with a convex platform two, the convex platform one and the convex platform two are staggered, and the convex circle one, the convex platform one, the convex platform two and the convex circle two form a serpentine channel.

[0023] As a preferred scheme of the electric dust collector rapping shaft sealing device, an auxiliary assembly is further arranged in the sealing cavity.

[0024] The auxiliary assembly comprises a fixing seat arranged on the base, a connecting rod arranged on the fixing seat, a friction disc two arranged on the connecting rod in a sleeved manner, and a spring fixed between the base and the friction disc two, and the friction disc two abuts against the friction disc one.

[0025] As a preferred scheme of the electric dust collector rapping shaft sealing device, a through hole is arranged on the sealing inner sleeve, a fixed block is threadedly connected in the through hole, one end of the fixed block abuts against the rapping shaft body, and one end of the fixed block close to the outer surface of the fixed inner sleeve is not higher than the edge of the through hole.

[0026] As a preferred scheme of the electric dust collector rapping shaft sealing device, the sealing outer sleeve comprises a first shell and a second shell which has the same structure as the first shell, the first shell and the second shell are fixedly installed through bolts, and the first shell and the second shell are symmetrically distributed.

[0027] The sealing inner sleeve comprises a first half cylinder and a second half cylinder which has the same structure as the first half cylinder, the first half cylinder and the second half cylinder are fixedly installed through bolts, and the first half cylinder and the second half cylinder are symmetrically distributed.

[0028] As a preferred scheme of the electric dust collector rapping shaft sealing device, an oil filling hole one is arranged on each of the first shell and the second shell, and the two oil filling hole ones penetrate the sealing outer sleeve and are connected with the movable area one.

[0029] An oil filling hole two is arranged on each of the first shell and the second shell, and the two oil filling hole two penetrate the sealing outer sleeve and are connected with the sealing area.

[0030] An oil filling channel is arranged on the inner side of each of the first shell and the second shell, the two oil filling channels are respectively connected with the corresponding oil filling hole two, and the sealing medium can enter the oil filling channel through the oil filling hole two and then enter the sealing area.

[0031] A detachable sealing plug is arranged in each of the oil filling hole one and the oil filling hole two.

[0032] The beneficial effects of the present application: multiple sealing rings are tightly sleeved on the beating shaft body, the inner sealing part can realize synchronous rotation with the beating shaft body through cooperation with the sealing ring and the beating shaft body, and the multi-stage sealing ring can block the air flow between the sealing inner sleeve and the beating shaft body, so that the negative pressure air can only enter the sealing cavity between the sealing outer sleeve and the sealing inner sleeve; lubricating oil is also injected into the sealing cavity, and multiple-stage serpentine channels are arranged between the sealing outer sleeves, the lubricating oil and the multiple-stage serpentine channels cooperate with each other to form a tight seal, which maximally isolates the external air; in addition, the spring of the auxiliary assembly can always abut the friction disc two against the friction disc one of the inner sealing part, so that the friction disc one and the friction disc two are always in contact, the sealing effect is guaranteed, and the lubricating oil can reduce the friction between the outer sealing assembly and the beating shaft body and between the friction disc one and the friction disc two, thereby reducing the resistance of the beating shaft body rotation, compared with the traditional felt seal, the device does not need to be maintained for a long time and can maintain the sealing effect, which brings long-term convenience to the staff. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0034] Fig. 1 is a schematic diagram of the overall structure of the present application.

[0035] Fig. 2 is an exploded view of the overall structure of the present application.

[0036] Fig. 3 is another exploded view of the overall structure of the present application.

[0037] Fig. 4 is an overall exploded view of the overall structure of the present application.

[0038] Fig. 5 is a partial schematic diagram of the sealing outer sleeve of the present application.

[0039] Fig. 6 is a partial schematic diagram of the sealing inner sleeve of the present application.

[0040] Fig. 7 is an opening schematic diagram of the sealing outer sleeve of the present application.

[0041] Fig. 8 is a top view of the opening schematic diagram of the sealing outer sleeve of the present application.

[0042] Fig. 9 is a partial structure exploded view of the auxiliary assembly of the present application. DETAILED DESCRIPTION

[0043] In order to make the above objectives, characteristics and advantages of the present application more apparent, concrete embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0044] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details and other implementations can be employed. Thus, the present application is not intended to be limited to the embodiments described herein and can be practiced with variations other than those described.

[0045] Secondly, the term "one embodiment" or "an embodiment" as used herein means that a particular implementation can include a particular feature, structure, or characteristic. However, such a phrase is not necessarily referring to the same embodiment or only to a single or preferred embodiment. "One embodiment" or "in one embodiment" as used herein does not necessarily refer to the same embodiment or to a preferred embodiment, but can include a specific feature, structure, or characteristic that can be incorporated into other embodiments to produce yet a further embodiment.

[0046] Thirdly, the present application is described in detail with reference to the accompanying drawings. In the detailed description of the embodiments of the present application, the sectional view of the device structure is partially enlarged without the general proportion for the convenience of description, and the schematic view is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in the actual manufacture.

[0047] Embodiment 1

[0048] Referring to FIGS. 1-2, a first embodiment of the present application provides a sealing device for a rapping shaft of an electric dust collector, which includes an electric dust collection assembly including an electric dust collector housing 101 and a rapping shaft body 102 disposed on the electric dust collector housing 101. The electric dust collection assembly in this embodiment is a vertical plate-type electric dust collector. The electric dust collector housing 101 is provided with a shaft hole, and the rapping shaft body 102 passes through the shaft hole. The device is installed at the connection between the rapping shaft body 102 and the shaft hole. Since a negative pressure is formed inside the vertical plate-type electric dust collector, external air is easily introduced into the inside of the electric dust collection assembly from the connection between the shaft hole and the rapping shaft body 102.

[0049] Further, the device further comprises an outer sealing assembly 200, which comprises a base 201 fixedly installed on the side surface of the electric dust collector shell 101 by bolts, a sealing outer sleeve 202 fixedly installed on the front side of the base 201 (note: the front side means the side away from the shell along the direction of the rapping shaft body 102, and the back side means the side opposite to the front side), and a sealing cavity 203 opened on the inner side of the sealing outer sleeve 202; an inner sealing assembly 300, which comprises an inner sealing part 301 arranged in the sealing cavity 203, and a sealing ring 302 sleeved in the inner sealing part 301; wherein the sealing ring 302 is sleeved on the circumferential surface of the rapping shaft body 102, the rapping shaft body 102 passes through the outer sealing assembly 200, and a sealing medium is arranged between the sealing outer sleeve 202 and the inner sealing part 301, and the sealing medium in the embodiment is lubricating oil.

[0050] In summary, for the inner sealing assembly 300, the plurality of sealing rings 302 are tightly sleeved on the rapping shaft body 102, the inner sealing part 301 can realize synchronous rotation with the rapping shaft body 102 through cooperation with the sealing ring 302 and the rapping shaft body 102, and the multi-stage sealing ring 302 can block the air flow between the sealing inner sleeve 301a and the rapping shaft body 102, so that the negative pressure air can only enter the sealing cavity 203 between the sealing outer sleeve 202 and the sealing inner sleeve 301a; for the outer sealing assembly 200, the base 201 is fixedly installed around the shaft hole on the electric dust collector shell 101, the rapping shaft body 102 passes through the sealing outer sleeve 202 and the base 201, the rapping shaft body 102 drives the inner sealing part 301 and the sealing ring 302 to rotate in the sealing cavity 203, and the lubricating oil in the sealing cavity 203 plays a role of lubrication and sealing between the inner sealing part 301 and the sealing outer sleeve 202.

[0051] During installation, first, the base 201 passes through the rapping shaft body 102, then the base 201 is fixedly installed on the electric dust collector shell 101 by bolts, then the sealing ring 302 is sleeved on the circumferential surface of the rapping shaft body 102, then the inner sealing part 301 is installed on the rapping shaft body 102 and the sealing ring 302, and finally the sealing outer sleeve 202 is wrapped around the inner sealing part 301 and the rapping shaft body 102, and then the inner sealing part 301 is fixedly installed on the base 201 by bolts.

[0052] Example 2

[0053] Referring to FIGS. 2-8, the second embodiment of the present application is different from the first embodiment in that the inner sealing part 301 includes a sealing inner sleeve 301a sleeved on the rapping shaft body 102, a fixed pin 301c threaded on the rear part of the sealing inner sleeve 301a, and a friction disc I 301b threaded on the rear side of the fixed pin 301c; the inner side of the sealing inner sleeve 301a is provided with a sealing inner groove 301d, the rapping shaft body 102 passes through the sealing inner groove 301d, a sealing ring 302 is located on the inner side of the sealing inner groove 301d, and the friction disc I 301b is provided with a protrusion 301b-1 on the side inside the sealing inner groove 301d, the protrusion 301b-1 is sleeved on the rear end of the sealing inner sleeve 301a.

[0054] Further, the sealing outer sleeve 202 includes a first shell 202b and a second shell 202c identical in structure to the first shell 202b, the first shell 202b and the second shell 202c are fixedly installed by bolts, and the first shell 202b and the second shell 202c are symmetrically distributed in an up-down direction; the sealing inner sleeve 301a includes a first half cylinder 301a-5 and a second half cylinder 301a-6 identical in structure to the first half cylinder 301a-5, the first half cylinder 301a-5 and the second half cylinder 301a-6 are fixedly installed by bolts, and the first half cylinder 301a-5 and the second half cylinder 301a-6 are symmetrically distributed in an up-down direction, which is convenient for workers to install and disassemble.

[0055] The sealing inner groove 301d is provided with four clamping grooves 301e, the four clamping grooves 301e are evenly distributed in parallel on the inner wall of the sealing inner sleeve 301a, and the sealing ring 302 is also provided with four, the four sealing rings 302 can be evenly distributed in parallel on the surface of the rapping shaft body 102, and the four sealing rings 302 are tightly fitted in the corresponding clamping grooves 301e respectively; through the clamping grooves 301e and the sealing rings 302, the sealing inner sleeve 301a can move synchronously with the rapping shaft body 102.

[0056] Specifically, when installing the inner sealing assembly 300, first, the friction disc 301b is passed through the rapping shaft body 102 from the front side of the rapping shaft body 102, and is sleeved on the rapping shaft body 102 at a proper position, then the four sealing rings 302 are sleeved on the rapping shaft body 102 one by one, the four sealing rings 302 are equidistantly distributed and arranged on the front side of the friction disc 301b, then the second half cylinder 301a-6 is placed below the rapping shaft body 102, so that the sealing inner groove 301d is aligned with the rapping shaft body 102, the four clamping grooves 301e correspond to the four sealing rings 302 respectively, then the rapping shaft body 102 is moved upward so that the clamping grooves 301e are tightly sleeved on the lower part of the sealing rings 302, then the first half cylinder 301a-5 is placed above the rapping shaft body 102, and the first half cylinder 301a-5 is sleeved on the upper part of the rapping shaft body 102, the first half cylinder 301a-5 and the second half cylinder 301a-6 correspond to each other internally, and the rapping shaft body 102 and the sealing rings 302 are clamped therebetween, then the four fixing pins 301c are used to tightly fix the first half cylinder 301a-5 and the second half cylinder 301a-6 together, two fixing pins 301c are arranged on each side, and the four fixing pins 301c are uniformly distributed at four corners, then it is ensured that the protrusions 301b-1 on the front side of the friction disc 301b enter the sealing inner groove 301d, so that the front end of the friction disc 301b abuts against the rear end of the sealing inner sleeve 301a, then the four fixing pins 301c are passed through the threaded holes in the friction disc 301b and the sealing inner sleeve 301a from the rear side of the friction disc 301b, two fixing pins 301c are arranged on each of the upper and lower sides, and the fixing pins 301c are symmetrically distributed; the bolts on the upper and lower sides are also symmetrically distributed, and are connected with the first half cylinder 301a-5 and the second half cylinder 301a-6 respectively; the friction disc 301b is fixed at the rear side of the sealing inner sleeve 301a by the four fixing pins 301c, so that it can rotate synchronously with the sealing inner sleeve 301a, and can also play a certain blocking role, and the fixing pins 301c do not protrude from the rear side surface of the fixing disc.

[0057] Referring to FIG. 5, the sealing cavity 203 includes a movable area 203a, a sealing area 203b adjacent to the movable area 203a, and a movable area 203c adjacent to the sealing area 203b; the movable area 203a is adjacent to the base 201, and the radii of the circumferential surfaces of the sealing area 203b are smaller than the radii of the circumferential surfaces of the movable area 203a and the movable area 203c respectively.

[0058] Referring to FIGS. 6 and 8, the sealing inner sleeve 301a includes a clamping section 301a-1 connected with the friction disc 301b, a connecting section 301a-2 adjacent to the clamping section 301a-1, and an abutting section 301a-3 adjacent to the connecting section 301a-2; the clamping section 301a-1 is located in the active area one 203a, the abutting section 301a-3 is located in the active area two 203c, and the radius of the circumferential surface of the connecting section 301a-2 is smaller than the radius of the circumferential surface of the connecting section 301a-2 and the abutting section.

[0059] Referring to FIGS. 5-8, four convex circles one 202a are fixedly arranged on the inner wall of the sealing outer sleeve 202 in parallel and equidifferent distribution, and four convex circles two 301a-4 are fixedly arranged on the outer wall of the connecting section 301a-2 in parallel and equidifferent distribution; the convex circles one 202a and the convex circles two 301a-4 are located in the sealing area 203b, the four convex circles one 202a and the four convex circles two 301a-4 are staggered, the frontmost convex circle one 202a is located to the right of the frontmost convex circle two 301a-4, the convex circle one 202a and the convex circle two 301a-4 form a sealing unit, the four convex circles one 202a and the four convex circles two 301a-4 form four levels of sealing, the lubricating oil fills therebetween, and the arrangement of the four levels of sealing can enhance the blocking of external gas by the device.

[0060] The side of the convex circle one 202a opposite to the convex circle two 301a-4 is fixedly provided with a convex boss one 202a-1, and the side of the convex circle two 301a-4 opposite to the convex circle one 202a is fixedly provided with two convex bosses two 301a-4a; the convex boss one 202a-1 and the convex boss two 301a-4a are staggered, the convex boss one 202a-1 is located between the two convex bosses two 301a-4a, the convex circle one 202a, the convex boss one 202a-1, the convex boss two 301a-4a and the convex circle two 301a-4 cooperate with each other to form a serpentine channel 301a-4b, the four levels of sealing have four serpentine channels 301a-4b, and the lubricating oil fills the sealing channel; the four serpentine channels 301a-4b cooperate with the lubricating oil, which further enhances the sealing effect and can maximize the isolation of external gas; the lubricating oil can also lubricate the parts, reducing the wear between the convex circle one 202a, the convex circle two 301a-4, the convex boss one 202a-1 and the convex boss two 301a-4a.

[0061] In addition, the convex boss one 202a-1 and the convex boss two 301a-4a can be provided with multiple convex bosses, which can enhance the complexity of the serpentine channel 301a-4b and further enhance the sealing effect.

[0062] During installation, according to the foregoing of the present embodiment, the base 201 and the inner sealing assembly 300 are sequentially installed first, and then the outer sealing sleeve 202 is installed, the second shell 202c is aligned with the vibration shaft body 102 and the lower side of the inner sealing part 301, the second shell 202c is moved upward so that the protruding ring 202a and the boss 202a-1 on the second shell 202c are aligned with and inserted into the corresponding protruding ring 301a-4 and boss 301a-4a, and the rear side of the outer sealing sleeve 202 is in close contact with the base 201, then the rear end of the outer sealing sleeve 202 is fixed on the base 201 through the left and right two bolts, and the first shell 202b is also installed in the same way, except that the second shell 202c is installed from the upper side of the vibration shaft body 102; then the first shell 202b and the second shell 202c are tightly installed into one body through the bolts.

[0063] The front wall of the protruding ring 202a on the most front side can block the abutting section 301a-3 together, after the gas enters between the outer sealing sleeve 202 and the vibration shaft body 102, enters the active area 203c, first bypasses the wider abutting section 301a-3, and then encounters the narrower connecting section 301a-2, and then enters the sealing area 203b, the gas in the active area 203c is preliminarily blocked, and then passes through the multi-stage sealing of the sealing area 203b, so as to maximize the isolation of external gas.

[0064] The rest of the structure is the same as that of example 1.

[0065] Example 3

[0066] Referring to FIGS. 4 and 7-9, the third embodiment of the present application is different from the second embodiment in that the sealing cavity 203 further comprises an auxiliary assembly 400; the auxiliary assembly 400 comprises a fixed seat 401 fixedly arranged on the front side of the base 201, four connecting rods 402 fixedly arranged on the front side of the fixed seat 401, a friction disc 404 slidingly arranged on the front part of the connecting rod 402, and a spring 403 fixedly arranged between the base 201 and the friction disc 404, the front side of the friction disc 404 abuts against the rear side of the friction disc 301b, and the spring 403 is sleeved on the side surface of the connecting rod 402.

[0067] Specifically, the spring 403 can always make the friction disc 404 abut against the friction disc 301b, and the friction disc 301b can rotate relative to the friction disc 404 during the rotation of the vibration shaft body 102, the friction disc 301b and the friction disc 404 can always be in close contact, and the friction between the friction disc 301b and the friction disc 404 can be reduced under the lubrication of the sealing medium lubricating oil, thereby reducing the resistance of the vibration shaft body 102 during rotation.

[0068] Further, the spring 403 abuts against the friction disc two 404 through the friction disc one 404, can extrude the sealing inner sleeve 301a to the front side, make the boss two 301a-4a on the convex circle two 301a-4 of the sealing inner sleeve 301a can contact with the convex circle one 202a, the boss one 202a-1 on the convex circle one 202a can contact with the convex circle two 301a-4, the auxiliary assembly 400 can also play the role of auxiliary sealing.

[0069] During installation, in combination with the content of the foregoing embodiments, when installing the base 201, the auxiliary assembly 400 is passed through the rapping shaft body 102 together with the base 201, and the base 201 is fixedly installed, when installing the inner sealing part 301, the friction disc one 301b is abutted against the friction disc two 404, and the spring 403 is pressed.

[0070] The rest of the structure is the same as that of the embodiment 2.

[0071] Embodiment 4

[0072] Referring to FIGS. 4 and 6-8, the fourth embodiment of the present application is different from the third embodiment in that the sealing inner sleeve 301a is provided with a through hole 301a-7, the through hole 301a-7 is threadedly connected with a fixing block 301a-8, the fixing block 301a-8 is a top pin, one end of the fixing block 301a-8 abuts against the rapping shaft body 102, the end of the fixing block 301a-8 close to the outer surface of the fixing sleeve is not higher than the edge of the through hole 301a-7, the first half cylinder 301a-5 and the second half cylinder 301a-6 are respectively provided with two fixing blocks 301a-8 and two through holes 301a-7, after the sealing inner sleeve 301a is installed, the four fixing blocks 301a-8 are respectively installed, through the cooperation of the four fixing blocks 301a-8 and the through holes 301a-7, the synchronous rotation of the sealing inner sleeve 301a and the shaft is further ensured, and the abrasion of the sealing ring 302 is avoided.

[0073] Specifically, if the lubricating effect is poor after long time use, if the fixing block 301a-8 is not provided, the friction force between the friction disc one 301b and the friction disc two 404 can be greater than the clamping force of the sealing inner sleeve 301a to the sealing ring 302 and the rapping shaft body 102, the sealing inner sleeve 301a can rotate relative to the rapping shaft body 102, at this time, the sealing ring 302 can be abraded in rotation; the plurality of fixing blocks 301a-8 provided in the embodiment can fasten the sealing inner sleeve 301a to be installed on the rapping shaft body 102, the occurrence of the foregoing condition can be effectively prevented, and the abrasion of the sealing ring 302 is prevented, for the abrasion caused by the long-term relative friction between the friction disc one 301b and the friction disc two 404, the stroke of the spring 403 can be used as compensation, and the lubricating oil can be supplemented in the later period.

[0074] The rest of the structure is the same as that of Example 3.

[0075] Example 5

[0076] Referring to Figs. 4-5, the fifth embodiment of the present application is different from the fourth embodiment in that: the first shell 202b and the second shell 202c are both provided with a first oil filling hole 204, and the two first oil filling holes 204 both pass through the sealing sleeve 202 and are connected with the movable area 203a; the first shell 202b and the second shell 202c are both provided with a second oil filling hole 205, and the two second oil filling holes 205 both pass through the sealing sleeve 202 and are connected with the sealing area 203b; the inner side of the first shell 202b and the second shell 202c are both provided with an oil filling channel 206, and the two oil filling channels 206 are respectively connected with the corresponding position of the second oil filling hole 205, the sealing medium can pass through the second oil filling hole 205 into the oil filling channel 206 and then into the sealing area 203b, the oil filling channel 206 transversely crosses the edge of the sealing area 203b, and the oil filling channel 206 penetrates the connection between the convex circle 202a and the inner wall of the sealing sleeve 202, the position of the oil filling channel 206 not passing through the convex circle 202a is open, and is connected with the sealing area 203b, which facilitates the lubricating oil entering the sealing area 203b from the second oil filling hole 205 to quickly enter each serpentine channel 301a-4b.

[0077] The first oil filling hole 204 and the second oil filling hole 205 are both provided with a detachable sealing plug 207, and the first oil filling hole 204 and the second oil filling hole 205 are both relatively narrow, the sealing plug 207 in the present embodiment adopts a sealing bolt, and the sealing plug 207 is tightly connected in the first oil filling hole 204 and the second oil filling hole 205 through threads, when filling oil, the staff takes out the sealing plug 207, then injects lubricating oil, and then inserts the sealing plug 207 and tightens it.

[0078] The rest of the structure is the same as that of Example 4.

[0079] It is important to note that the construction and arrangement of the application shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review the present disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements or positions can be altered or varied. Thus, the foregoing description is by way of example only, and is not intended to be limiting. The application is limited only as defined in the following claims and equivalents thereto. The sequence of any process or method steps, or the order in which they are carried out, can be altered or re-ordered without departing from the scope of the application. Any "articles of manufacture" or "manufacturing" as described herein are intended to encompass structures constructed of a multitude of different physical elements or components. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and also cover structures yet to be invented which perform the recited function but operate in a different manner. Other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the application as expressed in the appended claims.

[0080] Also, for the purposes of illustration only, and not by way of limitation, the description of the exemplary embodiments can not describe all features of actual implementations (i.e., those not relevant to the best mode of practicing the application currently under consideration, or those not relevant to implementing the application).

[0081] It is understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions can be made. Such development efforts can be complex and time-consuming, but would be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.

[0082] It should be noted that the above-mentioned embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application, and although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalent replaced without departing from the spirit and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. An electric precipitator rapping shaft seal apparatus characterized by: The utility model relates to an electric dust removal assembly, which comprises an electric dust removal shell (101), a rapping shaft body (102) arranged on the electric dust removal shell (101), an outer sealing assembly (200) comprising a base (201) arranged on the electric dust removal shell (101), a sealing outer sleeve (202) arranged on the base (201), and a sealing cavity (203) formed in the sealing outer sleeve (202), and an inner sealing assembly (300) comprising an inner sealing part (301) arranged in the sealing cavity (203) and a sealing ring (302) sleeved in the inner sealing part (301). The sealing ring (302) is sleeved on the rapping shaft body (102), the rapping shaft body (102) passes through the outer sealing assembly (200), and a sealing medium is arranged between the sealing outer sleeve (202) and the inner sealing part (301). The inner sealing part (301) comprises a sealing inner sleeve (301a) sleeved on the rapping shaft body (102), a fixed pin (301c) arranged on the sealing inner sleeve (301a), and a friction disc I (301b) arranged on the fixed pin (301c). A sealing inner groove (301d) is formed in the inner side of the sealing inner sleeve (301a), the rapping shaft body (102) passes through the sealing inner groove (301d), and the sealing ring (302) is located on the inner side of the sealing inner groove (301d). A protrusion (301b-1) is arranged on one side of the friction disc I (301b) inside the sealing inner groove (301d), and the protrusion (301b-1) is sleeved on the sealing inner sleeve (301a).

2. The rapping shaft seal for an electrostatic precipitator as defined in claim 1, wherein: A clamping groove (301e) is formed in the sealing inner groove (301d), the sealing ring (302) is tightly attached to the clamping groove (301e), and the sealing inner sleeve (301a) can move synchronously with the rapping shaft body (102) through the clamping groove (301e) and the sealing ring (302). The sealing cavity (203) comprises a movable area I (203a), a sealing area (203b) adjacent to the movable area I (203a), and a movable area II (203c) adjacent to the sealing area (203b). The movable area I (203a) is adjacent to the base (201). The sealing inner sleeve (301a) comprises a clamping section (301a-1) connected to the friction disc I (301b), a connecting section (301a-2) adjacent to the clamping section (301a-1), and an abutting section (301a-3) adjacent to the connecting section (301a-2).

3. The rapping shaft seal for an electrostatic precipitator as defined in claim 2, wherein: The clamping section (301a-1) is located in the movable area I (203a), the abutting section (301a-3) is located in the movable area II (203c), and the radius of the circumferential surface of the connecting section (301a-2) is smaller than the radius of the circumferential surface of the connecting section (301a-2) and the abutting section. ​ 4. The rapping shaft seal for an electrostatic precipitator as defined in claim 3, wherein: ​ ​ 5. The rapping shaft seal for an electrostatic precipitator as defined in claim 4, wherein: The inner wall of the sealing jacket (202) is fixedly provided with a convex circle I (202a), the outer wall of the connecting section (301a-2) is fixedly provided with a convex circle II (301a-4), and the convex circle I (202a) and the convex circle II (301a-4) are located in the sealing area (203b).

6. The rapping shaft seal for an electrostatic precipitator as defined in claim 5, wherein: The side of the convex circle I (202a) opposite to the convex circle II (301a-4) is provided with a convex platform I (202a-1), the side of the convex circle II (301a-4) opposite to the convex circle I (202a) is provided with a convex platform II (301a-4a), the convex platform I (202a-1) and the convex platform II (301a-4a) are staggered, and the convex circle I (202a), the convex platform I (202a-1), the convex platform II (301a-4a) and the convex circle II (301a-4) cooperatively form a serpentine channel (301a-4b).

7. The rapping shaft seal for an electrostatic precipitator as defined in claim 6, wherein: The sealing cavity (203) is further provided with an auxiliary assembly (400); The auxiliary assembly (400) comprises a fixing seat (401) arranged on the base (201), a connecting rod (402) arranged on the fixing seat (401), a friction disc II (404) sleeved on the connecting rod (402), and a spring (403) fixedly arranged between the base (201) and the friction disc II (404), and the friction disc II (404) abuts against the friction disc I (301b).

8. The rapping shaft seal for an electrostatic precipitator as defined in claim 7, wherein: A through hole (301a-7) is formed in the sealing inner sleeve (301a), a fixed block (301a-8) is threadedly connected in the through hole (301a-7), one end of the fixed block (301a-8) abuts against the rapping shaft body (102), and the end of the fixed block (301a-8) close to the inner sleeve outer surface is not higher than the edge of the through hole (301a-7).

9. The rapping shaft seal for an electrostatic precipitator as defined in claim 3 or 8, wherein: The sealing outer sleeve (202) comprises a first shell (202b) and a second shell (202c) which is identical in structure with the first shell (202b), the first shell (202b) and the second shell (202c) are fixedly installed by bolts, and the first shell (202b) and the second shell (202c) are symmetrically distributed. The sealing inner sleeve (301a) comprises a first half cylinder (301a-5) and a second half cylinder (301a-6) which is identical in structure with the first half cylinder (301a-5), the first half cylinder (301a-5) and the second half cylinder (301a-6) are fixedly installed by bolts, and the first half cylinder (301a-5) and the second half cylinder (301a-6) are symmetrically distributed. The first shell (202b) and the second shell (202c) are both provided with an oil filling hole I (204), and the two oil filling hole Is (204) penetrate through the sealing outer sleeve (202) and are connected with the movable area I (203a).

10. The rapping shaft seal for an electrostatic precipitator as defined in claim 9, wherein: ​ The first shell (202b) and the second shell (202c) are provided with oil filling holes two (205), both of which pass through the sealing sleeve (202) and are connected with the sealing area (203b); The first shell (202b) and the second shell (202c) are provided with oil filling channels (206) on the inner sides, both of which are connected with the oil filling holes two (205) at the corresponding positions, and the sealing medium can enter the oil filling channels (206) through the oil filling holes two (205) to enter the sealing area (203b); The oil filling holes one (204) and the oil filling holes two (205) are provided with detachable sealing plugs (207).

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