CN113864454A

CN113864454A - Leakage plugging structure and leakage plugging method

Info

Publication number: CN113864454A
Application number: CN202111086029.2A
Authority: CN
Inventors: 杨海明; 廖伟兴; 杨振洪; 傅川岳; 李洪禹; 杨淑慧; 王伟; 张书辉; 王铠; 张繁
Original assignee: Shenzhen Power Supply Co ltd
Current assignee: Shenzhen Power Supply Co ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2021-12-31
Anticipated expiration: 2041-09-16
Also published as: CN113864454B

Abstract

The invention relates to a leakage plugging structure and a leakage plugging method. According to the leakage plugging method, the end part of the gap between the transmission shaft and the equipment flange is plugged through the arrangement of the first sealing ring, and then the sealing sleeve is sleeved and filled with the sealing glue, so that the sealing glue can be prevented from flowing into the gap between the transmission shaft and the equipment flange. And the sealing between the sealing sleeve and the transmission shaft is realized after the sealant is cured. And then, a second sealing ring is sleeved on the outer side of the sealing sleeve, and the fixing seat is continuously sleeved in the fixing seat, so that the sealing connection between the fixing seat and the sealing sleeve is realized. When the fixed seat is fixed relative to the equipment flange, the leakage plugging of the shaft seal on the transmission shaft is realized. That is to say, this mode of operation only need embolia in proper order on the transmission shaft and carry out sealed spare part can, the sealed setting of gluing and two sealing washers moreover need not to shut down work, also need not to fill into a large amount of gas, directly on the transmission shaft operate can, the operation is comparatively simple.

Description

Leakage plugging structure and leakage plugging method

Technical Field

The invention relates to the technical field of electrical equipment, in particular to a leakage plugging structure and a leakage plugging method.

Background

A shaft seal of a transmission shaft in a GAS Insulated SWITCHGEAR (GIS) knife switch device causes GAS leakage due to aging loss of a seal, thereby affecting the normal operation of the device. The prior technical measures are as follows: 1. temporarily processing, namely supplementing the air pressure to a rated value, and supplementing air to the rated value when the air pressure is leaked to the state of not alarming; 2. the radical treatment method comprises the steps of powering off the equipment, disassembling and overhauling, replacing the sealing body and repairing the equipment.

However, the above two methods have the following disadvantages: 1. the temporary treatment not only wastes a large amount of SF6 (sulfur hexafluoride) gas and causes gas pollution, but also cannot fundamentally solve the equipment problem; 2. although the radical treatment can be completely solved, the long-term shutdown of the large-area equipment of the system is needed to be matched with the treatment, the cost for treating power failure and the cost for treating the equipment are high, the large-area shutdown of the system is difficult to plan and arrange, and the treatment of the equipment problems is not facilitated.

Disclosure of Invention

Based on this, it is necessary to provide a leakage blocking method for solving the technical problem of inconvenient maintenance when there is gas leakage in the prior art.

A method of leak plugging comprising the steps of: sleeving a first sealing ring at the position where the transmission shaft is connected with the equipment flange, sleeving a sealing sleeve outside the transmission shaft, filling a sealing glue between the sealing sleeve and the transmission shaft, and curing the sealing glue; the second sealing ring is sleeved outside the sealing sleeve, the fixing seat is sleeved outside the sealing sleeve, and the fixing seat is fixed relative to the equipment flange.

According to the leakage plugging method, the end part of the gap between the transmission shaft and the equipment flange is plugged through the arrangement of the first sealing ring, and then the sealing sleeve is sleeved and filled with the sealing glue, so that the sealing glue can be prevented from flowing into the gap between the transmission shaft and the equipment flange. And the sealing between the sealing sleeve and the transmission shaft is realized after the sealant is cured. And then, a second sealing ring is sleeved on the outer side of the sealing sleeve, and the fixing seat is continuously sleeved in the fixing seat, so that the sealing connection between the fixing seat and the sealing sleeve is realized. When the fixed seat is fixed relative to the equipment flange, the leakage plugging of the shaft seal on the transmission shaft is realized. That is to say, this mode of operation only need embolia in proper order on the transmission shaft and carry out sealed spare part can, the sealed setting of gluing and two sealing washers moreover need not to shut down work, also need not to fill into a large amount of gas, directly on the transmission shaft operate can, the operation is comparatively simple.

In one embodiment, after the sealant is cured, a first sealing ring is sleeved on the tail end of the sealing sleeve and between the sealing sleeve and the transmission shaft again.

In one embodiment, a third seal ring is installed in the groove of the holder prior to fixing the holder relative to the device flange.

In one embodiment, before the first seal ring is mounted relative to the transmission shaft, the side wall of the transmission shaft and the end surface of the equipment flange are ground, and the equipment flange is provided with a fastening hole extending along the axial direction of the transmission shaft.

The present invention also provides a leak-blocking structure that alleviates at least one of the above-mentioned problems.

A leakage plugging structure comprises a sealing sleeve, a sealing ring and a fixed seat;

the sealing sleeve is used for being sleeved on the outer side of the transmission shaft, and sealing glue is filled between the sealing sleeve and the transmission shaft; at least one end of the sealing sleeve, facing the equipment flange, is provided with a first sealing ring in a pressing mode, and the first sealing ring is plugged at the end part of a gap between the transmission shaft and the sealing sleeve; the fixing seat is sleeved outside the sealing sleeve and used for being fixed with the equipment flange.

The leakage plugging structure is sealed at one time by sleeving the sealing sleeve on the outer side of the transmission shaft and filling the sealing glue between the sealing sleeve and the transmission shaft. And a first sealing ring is arranged between the transmission shaft and the sealing sleeve for secondary sealing. Meanwhile, the fixed seat is sleeved outside the sealing sleeve, so that the fixed seat is fixedly connected with the equipment flange, and the installation of the leakage plugging structure relative to equipment is realized. Thus, gas leakage on the transmission shaft can be realized. The whole structure is simple, and the plugging effect is ensured through the twice sealing matching of each part. And the operation is simple, the structure is only required to be sleeved relatively to the transmission seal and fixed with the equipment flange, gas does not need to be filled in the plugging process, and meanwhile, the shutdown maintenance is not required.

In one embodiment, the fixing seat is configured with a mounting hole for sleeving the sealing sleeve; and a second sealing ring is arranged between the hole wall of the mounting hole and the side wall of the sealing sleeve.

In one embodiment, the side wall of the sealing sleeve is configured with a first groove extending circumferentially itself, and a portion of the second sealing ring is accommodated in the first groove.

In one embodiment, a second groove extending along the circumferential direction of the second groove is formed at one end, facing the equipment flange, of the fixed seat, and a third sealing ring is installed in the second groove and is compressed between the fixed seat and the equipment flange.

In one embodiment, the first grooves are annular grooves, the number of the first grooves is at least two, at least two first grooves are arranged at intervals along the axial direction of the sealing sleeve, and the second sealing ring is correspondingly installed in each first groove; and/or, the second groove is an annular groove, the number of the second grooves is at least two, the diameters of the second grooves are sequentially increased from inside to outside and are arranged at intervals, and each second groove is correspondingly provided with the third sealing ring.

In one embodiment, the fixing seat is configured with a plurality of fixing holes arranged at intervals, and the plurality of fixing holes are arranged at intervals around the axis of the fixing seat.

Drawings

Fig. 1 is a schematic view of a leak-stopping structure provided in an embodiment of the present invention installed in an apparatus;

FIG. 2 is a first exploded view of the leak-sealing structure provided in FIG. 1 mounted to an apparatus;

FIG. 3 is a second exploded view of the leak-sealing structure provided in FIG. 1 mounted to an apparatus;

FIG. 4 is a partial cross-sectional view A-A of FIG. 1;

FIG. 5 is a schematic view of a gland in the leak-sealing configuration provided in FIG. 1;

FIG. 6 is a schematic view of a mounting block in the leak-stopping structure provided in FIG. 1;

fig. 7 is a flowchart of a leak blocking method according to an embodiment of the present invention.

Reference numerals: 10-sealing sleeve; 11, a first groove; 20-a fixed seat; 21-groove two; 31-a first sealing ring; 32-a second seal ring; 33-a third sealing ring; 34-open flat pad; 35-sealing glue; 40-a fastener; 100-a drive shaft; 200-an equipment flange; 201-avoidance groove; 202-fixing holes; 1000-leakage blocking structure; 2001-fastening holes.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

As shown in fig. 2, fig. 3, fig. 4 and fig. 7, an embodiment of the present invention provides a leakage blocking method, which is mainly used for performing leakage blocking on a shaft seal on a transmission shaft 100 in a GIS disconnecting link device. The method comprises the following steps: the first sealing ring 31 is sleeved at the connecting position of the transmission shaft 100 and the equipment flange 200, the sealing sleeve 10 is sleeved outside the transmission shaft 100, then the sealing glue 35 is filled between the sealing sleeve 10 and the transmission shaft 100, and the sealing glue 35 is cured. The second sealing ring 32 is sleeved outside the sealing sleeve 10, the fixing seat 20 is sleeved outside the sealing sleeve 10, and the loudness equipment flange 200 of the fixing seat 20 is fixed.

Specifically, the first seal ring 31 is sleeved on the transmission shaft 100, the first seal ring 31 is moved to the end of the gap between the transmission shaft 100 and the equipment flange 200 (i.e. the exposed part), then the sealing sleeve 10 is sleeved on the transmission shaft 100, and the end of the sealing sleeve 10 facing the equipment flange 200 is pressed on the first seal ring 31, so as to seal the end of the gap, thereby forming a primary seal. Then, the sealant 35 is filled in the gap between the sealing sleeve 10 and the transmission shaft 100, and a sealant layer (hereinafter, referred to as sealant) is formed after the sealant 35 is cured. The sealant 35 not only serves as a seal between the transmission shaft 100 and the sealing sleeve 10, but also can improve the installation reliability of the sealing sleeve 10 relative to the transmission shaft 100, which is equivalent to bonding the two together. At this time, the first seal ring 31 is provided at the end of the gap, so that the filled sealant 35 does not flow into the space between the transmission shaft 100 and the equipment flange 200. Then, a second sealing ring 32 is sleeved outside the sealing sleeve 10, and the fixing seat 20 is sleeved on the sealing sleeve 10. At this time, the second seal ring 32 is installed between the outer sidewall of the seal sleeve 10 and the hole wall of the fixing seat 20, so as to realize the rotary seal between the seal sleeve 10 and the fixing seat 20. Finally, the fixing base 20 is fixed to the device flange 200. Thus, the leakage plugging of the shaft seal on the transmission shaft 100 can be realized. In the whole operation process, only the operation is directly carried out on the transmission shaft 100, the sealing parts matched with each other are arranged on the transmission shaft 100 in the steps, the stop operation is not needed, a large amount of gas is not needed to be filled, and the operation is simple.

It should be added that the sealant 35 is actually a metal adhesive, and the sealing adhesion between metals is realized. Wherein, the metal material of the sealing sleeve 10 may be similar to that of the transmission shaft 100. Moreover, after the injected sealant 35 is cured, the bonding position of the sealing sleeve 10 and the transmission shaft 100 can bear the working pressure of 1Mpa for a long time, and the shaft seal effect is improved.

As shown in fig. 2, 3, 4 and 7, in some embodiments, an open flat pad 34 is placed over the drive shaft 100 before the first seal 31 is placed over the drive shaft 100. In operation, the split flat pad 34 can be opened to fit over the drive shaft 100 and fit over the end of the gap. The opening flat pad 34 is provided to position the first sealing ring 31, so as to ensure that the first sealing ring 31 can deform within a proper range to perform a sealing function. The first seal ring 31 is an O-ring.

As shown in fig. 2, 3, 4 and 7, in some embodiments, after the sealant 35 is cured, a first sealing ring 31 is sleeved again at the end of the sealing sleeve 10 between the sealing sleeve 10 and the transmission shaft 100, and the first sealing ring 31 is compressed between the sealing sleeve 10 and the transmission shaft 100. That is, the first seal rings 31 are respectively installed at both ends of the seal sleeve 10 in the axial direction, and both ends of the seal sleeve 10 are sealed. At this time, the sealant 35 filled between the sealing sleeve 10 and the transmission shaft 100 is in a closed space, thereby ensuring that the sealant 35 does not flow out, and improving the bonding and sealing effect. Moreover, it is ensured that the sealant 35 and the first seal ring 31 do not interfere with each other due to the mounting after curing.

As shown in fig. 2, 3, 4 and 7, in some embodiments, the third seal 33 is installed in a groove of the holder 20 before the holder 20 is fixed relative to the device flange 200. That is to say, the third sealing ring 33 is pressed between the fixing seat 20 and the equipment flange 200 to realize sealing therebetween, so as to further improve the shaft seal leakage blocking effect. Wherein, when manufacturing the fixing base 20, a groove structure needs to be lathed on the end surface of the fixing base 20 so as to install the third sealing ring 33. Part of the third sealing ring 33 is accommodated in the groove, and when the fixed seat 20 is pressed against the end face of the equipment flange 200, the third sealing ring 33 is extruded and deformed.

As shown in fig. 2, 3, 4 and 7, in some embodiments, before the first seal ring 31 is mounted with respect to the drive shaft 100, the side wall of the drive shaft 100 and the end surface of the attachment flange 200 are ground, and fastening holes 2001 extending in the axial direction of the drive shaft 100 are opened in the attachment flange 200. That is, before plugging, the side wall of the transmission shaft 100 and the end face of the equipment flange 200 need to be polished to remove burrs, so as to ensure that the installation surface is smooth, and when the sealing structure is installed, the sealing effect cannot be affected by the burrs. When the grinding is completed, fastening holes 2001 need to be provided in advance in the device flange 200 so that the fixing base 20 is fastened to the device flange 200 by the fastening members 40 of the bolts when the fixing base 20 is mounted to the device flange 200. Furthermore, it is because the split flat gasket 34 is required to be installed for positioning before the first sealing ring 31 is installed for the first time. It is necessary to perform a grinding process on the above two positions before installing the open flat pad 34. In a specific embodiment, the fastening holes 2001 are arranged to be staggered with the threaded holes of the flange 200 for the mounting bolts. For example, one fastening hole 2001 is provided between any adjacent two threaded holes. The diameter of the fastening hole 2001 is smaller than the diameter of the threaded hole of the device flange 200 itself. Through such an arrangement, the equipment flange 200 can be ensured to have good structural strength on the basis of satisfying the fastening.

As shown in fig. 1 to 4, in an embodiment of the present invention, a leakage blocking structure 1000 is further provided, which includes a sealing sleeve 10, a first sealing ring 31, and a fixing seat 20. The sealing sleeve 10 is used for being sleeved on the outer side of the transmission shaft 100, and a sealing glue 35 is filled between the sealing sleeve 10 and the transmission shaft 100. The sealing sleeve 10 is provided with a first sealing ring 31 at one end facing the equipment flange 200, and the first sealing ring 31 seals the end of the gap between the transmission shaft 100 and the sealing sleeve 10. The fixing sleeve is sleeved outside the sealing sleeve 10, and the fixing seat 20 is used for fixing with the equipment flange 200.

Specifically, the sealing sleeve 10 is arranged to be sleeved on the outer side of the transmission shaft 100, and the sealing adhesive between the sealing sleeve 10 and the transmission shaft 100 is realized by using the sealant 35 filled between the two, so as to realize the sealing connection between the two. The first sealing ring 31 is used for sealing the sealant 35, so that the sealant 35 is prevented from flowing between the transmission shaft 100 and the equipment flange 200, and the end part of the sealing sleeve 10 can be sealed. The fixing sleeve is provided for fixing with the equipment flange 200, thereby further enhancing the fixing of the leakage blocking structure 1000 relative to the transmission shaft 100, and realizing the installation of the leakage blocking structure 1000 relative to the equipment. In this manner, gas leakage on the drive shaft 100 is achieved. The whole structure is simple, and the plugging effect is ensured through the twice sealing matching of each part. Moreover, the operation is simple, the structure is only required to be arranged relative to the transmission sealing sleeve 10 and fixed with the equipment flange 200, gas does not need to be filled in the plugging process, and meanwhile, shutdown maintenance is not required.

As shown in fig. 1 to 4, in other embodiments, a first sealing ring 31 is also provided at the end of the sealing sleeve 10 facing away from the device flange 200. The first sealing rings 31 are arranged at the two axial ends of the sealing sleeve 10, so that the gap between the sealing sleeve 10 and the transmission shaft 100 is sealed, the sealant 35 filled in the gap is prevented from leaking, and the sealing and bonding quality between the transmission shaft 100 and the sealing sleeve 10 is improved.

As shown in fig. 2 to 4, in some embodiments, the fixing base 20 is configured with a mounting hole for sleeving the sealing sleeve 10. A second sealing ring 32 is arranged between the hole wall of the mounting hole and the side wall of the sealing sleeve 10. Specifically, the second seal ring 32 is provided to seal between the fixed base 20 and the seal cover 10, and a third seal is performed in addition to the above-described two seals, thereby improving the seal-blocking effect of the leak-blocking structure 1000. In fact, after the sealing boot 10 is hermetically bonded to the drive shaft 100 by the sealant 35, the boot 10 rotates together with the drive shaft 100. After the fixing base 20 is fixed relative to the device flange 200, the fixing base 20 is in a stationary state, so that the sealing sleeve 10 rotates relative to the fixing base 20 along with the transmission shaft 100. At this time, the second sealing ring 32 installed between the sealing sleeve 10 and the fixing base 20 functions as a rotary seal. The thickness of the second sealing ring 32 accommodated in the first groove 11 is greater than the thickness of the second sealing ring 32 protruding out of the first groove 11. This arrangement ensures that the second seal ring 32 does not become loose due to friction with the wall of the mounting hole in the holder 20 when the holder 20 is mounted. In a specific embodiment, the second sealing ring 32 is an O-ring, and is disposed on the outer sidewall of the sealing sleeve 10. Wherein, the number of the second sealing rings 32 can be one, two, three, etc., and when the number of the second sealing rings 32 is at least two, the second sealing rings are arranged at intervals along the axial direction of the sealing sleeve 10. Thereby, a plurality of seals are provided between the sealing sleeve 10 and the fixed seat 20.

As shown in fig. 2-5, in some embodiments, the side wall of the sealing sleeve 10 is configured with a first groove 11 extending axially along itself, and a portion of the second sealing ring 32 is received within the first groove 11. Specifically, the first groove 11 provides a receiving space for mounting the second seal ring 32, so that the second seal ring 32 is prevented from axially shifting on the sealing sleeve 10, and the mounting stability of the second seal ring 32 is improved. When the fixing seat 20 is installed outside the sealing sleeve 10, the second sealing ring 32 is arranged to realize the rotary sealing of the sealing sleeve 10 relative to the fixing seat 20. In a specific embodiment, the first grooves 11 are annular grooves, the number of the first grooves 11 is at least two, the at least two first grooves 11 are arranged at intervals along the axial direction of the sealing sleeve 10, and each first groove 11 is correspondingly provided with the second sealing ring 32. That is, the first groove 11 is shaped as an annular groove structure in a closed ring around the circumferential direction of the sealing sleeve 10. At this time, the second seal ring 32 fitted in the groove one 11 has a restraining effect of the groove one 11 everywhere. The number of the first grooves 11 is matched with the number of the second sealing rings 32, so that stable installation of multiple seals between the sealing sleeve 10 and the fixing seat 20 is ensured. In yet another specific embodiment, the number of the first grooves 11 is two. The arrangement of the two first grooves 11 on the basis of meeting the multi-sealing requirement does not cause the problem that the structural strength of the sealing sleeve 10 is affected due to the fact that the number of the first grooves 11 is large.

As shown in fig. 2, 3, 4 and 6, in some embodiments, one end of the fixing seat 20 facing the device flange 200 is provided with a second groove 21 extending along a circumferential direction of the fixing seat, a third sealing ring 33 is installed in the second groove 21, and the third sealing ring 33 is compressed between the fixing seat 20 and the device flange 200. Specifically, the third sealing ring 33 is arranged to seal between the end face of the fixing seat 20 and the end face of the equipment flange 200. When actually installed, the third sealing ring 33 deforms under pressure to seal as the fixing seat 20 is pressed against the device flange 200 by the fastening member 40. The third seal ring 33 is an O-ring. Wherein, in order to ensure that the third sealing ring 33 has enough deformation part, the thickness of the third sealing ring 33 installed in the second groove 21 is smaller than the thickness of the third sealing ring 33 protruding out of the second groove 21.

As shown in fig. 2, 3, 4 and 6, in a specific embodiment, the second grooves 21 are annular grooves, the number of the second grooves 21 is at least two, the diameters of the at least two second grooves 21 are sequentially increased from inside to outside and are arranged at intervals, and each second groove 21 is correspondingly provided with a third sealing ring 33. With such an arrangement, the sealing performance between the fixing base 20 and the device flange 200 can be improved. When the number of the second grooves 21 is two, the two grooves are respectively the second large-diameter groove 21 and the second small-diameter groove 21, and the third sealing ring 33 with the large diameter and the third sealing ring 33 with the small diameter correspond to each other. Of course, the number of the second grooves 21 may be three or four. In the preferred embodiment, the number of second grooves 21 is three. The two grooves 21 are sequentially and uniformly arranged from inside to outside and from small to large according to the distance from the edge of the mounting hole to the edge of the fixing seat 20.

As shown in fig. 2, 3, 4 and 6, in some embodiments, the holder 20 is configured with a plurality of spaced apart fixing holes 202, and the plurality of fixing holes 202 are spaced apart about an axis of the holder 20. Each fastening hole 202 corresponds to a fastening hole 2001 opened in the equipment flange 200 to enable the assembly of a fastener 40 such as a bolt with respect to the fixing base 20 and the equipment flange 200. Wherein, be provided with a plurality of and equipment flange 200 on one side of fixing base 20 orientation equipment flange 200 the bolt one-to-one complex dodge groove 201 to be convenient for hold the nut of establishing and being connected in the bolt, reduce the interference of bolt on the equipment flange 200 to the installation of fixing base 20. Thus, the plurality of fixing holes 202 and the plurality of avoiding grooves 201 are arranged on the fixing base 20 at intervals, and one avoiding groove 201 is arranged between any two adjacent fixing holes 202. The avoiding groove 201 is recessed along the axial direction of the fixing seat 20, and the recessed depth is greater than the thickness of the nut.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A method of leak plugging comprising the steps of:

sleeving a first sealing ring (31) at the position where a transmission shaft (100) is connected with an equipment flange (200), sleeving a sealing sleeve (10) outside the transmission shaft (100), filling a sealing glue (35) between the sealing sleeve (10) and the transmission shaft (100), and curing the sealing glue (35);

the second sealing ring (32) is sleeved on the outer side of the sealing sleeve (10), the fixing seat (20) is sleeved on the outer side of the sealing sleeve (10), and the fixing seat (20) is fixed relative to the equipment flange (200).

2. Method for leak plugging according to claim 1, characterized in that after the curing of the sealant (35) a first sealing ring (31) is again fitted at the end of the sealing sleeve (10) between the sealing sleeve (10) and the drive shaft (100).

3. Method for leak plugging according to claim 1, wherein a third sealing ring (33) is inserted into the groove of the holder (20) before the holder (20) is fixed relative to the device flange (200).

4. The leak blocking method according to claim 1, wherein before the first seal ring (31) is mounted with respect to the drive shaft (100), the side wall of the drive shaft (100) and the end surface of the equipment flange (200) are ground, and fastening holes extending in the axial direction of the drive shaft (100) are opened in the equipment flange (200).

5. A leakage plugging structure is characterized by comprising a sealing sleeve (10), a first sealing ring (31) and a fixed seat (20);

the sealing sleeve (10) is sleeved on the outer side of the transmission shaft (100), and a sealing glue (35) is filled between the sealing sleeve (10) and the transmission shaft (100); at least one end, facing an equipment flange (200), of the sealing sleeve (10) is provided with a first sealing ring (31) in a pressing mode, and the first sealing ring (31) is plugged at the end of a gap between the transmission shaft (100) and the sealing sleeve (10); the fixing seat (20) is sleeved outside the sealing sleeve (10), and the fixing seat (20) is used for being fixed with the equipment flange (200).

6. Leak-blocking structure according to claim 5, characterized in that the holder (20) is configured with a mounting hole for the sleeve of the sealing sleeve (10);

and a second sealing ring (32) is arranged between the hole wall of the mounting hole and the side wall of the sealing sleeve (10).

7. Leak-blocking structure according to claim 6, characterized in that the side wall of the sealing sleeve (10) is configured with a first groove (11) extending circumferentially itself, a portion of the second sealing ring (32) being accommodated within the first groove (11).

8. Leakage blocking structure according to claim 7, characterized in that the end of the fixed seat (20) facing the equipment flange (200) is configured with a second groove (21) extending circumferentially along itself, and a third sealing ring (33) is mounted in the second groove (21), and the third sealing ring (33) is compressed between the fixed seat (20) and the equipment flange (200).

9. The leak blocking structure according to claim 8, wherein the first groove (11) is an annular groove, the number of the first grooves (11) is at least two, at least two first grooves (11) are arranged at intervals along the axial direction of the sealing sleeve (10), and the second sealing ring (32) is correspondingly installed in each first groove (11);

and/or, the second groove (21) is an annular groove, the number of the second groove (21) is at least two, the diameters of the second groove (21) are sequentially increased from inside to outside and are arranged at intervals, and each second groove (21) is correspondingly provided with the third sealing ring (33).

10. Leak blocking structure according to any one of claims 5 to 9, characterized in that the holder (20) is configured with a plurality of fastening holes (202) arranged at intervals, and that the plurality of fastening holes (202) are arranged at intervals around the axis of the holder (20).