Mine overlying strata separation layer grouting grout spillage prevention and control equipment

Abstract

The invention relates to the technical field of bed separation grouting, and discloses a mine overlying strata bed separation grouting grout overflow prevention device which comprises a first sealing mechanism arranged in the middle of a sleeve and a second sealing mechanism installed at the joint of the two sleeves. The first sealing mechanism comprises a cylindrical sleeve capable of rotating relative to the outer side of the casing pipe, an annular groove is formed in the middle of the sleeve, a first elastic skin is arranged at a groove opening of the annular groove and seals the annular groove to form an air cavity, an air channel communicated with the air cavity is formed in the sleeve, and an air inlet is formed in one end of the air channel. A power mechanism is further arranged on the sleeve and drives the sleeve to rotate along the casing pipe. The second sealing mechanism blocks the grouting hole at the joint of the two sleeves. By means of the designed sealing mechanism, the grouting hole can be effectively sealed, waste of grout is avoided, meanwhile, the separation grouting effect can be improved, and the safety of a mining area is improved.

Description

Technical Field

[0001] The invention relates to the technical field of delamination grouting, and in particular to a grouting prevention and control device for delamination grouting of overburden rock in a mine. Background Art

[0002] In the field of coal mining, in order to reduce the impact of mining on the ground surface, grouting treatment is usually carried out through drilling into the delamination fissures between the overlying rock strata above the coal seam, such as fly ash, sand and gravel, so as to reduce the movement of the overlying rock and thus achieve the purpose of controlling surface subsidence.

[0003] The stratum grouting is to construct a hole in the ground and then inject grout to the stratum. The space from the surface to the stratum is mainly the Quaternary loose layer, bedrock (rock layer), and stratum space. It is similar to oil drilling. The general operation is: first construct the grouting drilling, then cement the well, and finally put in the casing.

[0004] At present, when grouting is performed on the delamination, if the drilling and cementing are not done well, since the diameter of the casing is smaller than the diameter of the drill hole, the slurry is easy to flow out from the pores between the casing and the soil when flowing out of the grouting hole, thereby causing slurry bubbling, and the grouting is forced to stop, which seriously affects the delamination reinforcement effect and causes a large amount of slurry to be wasted, thus causing major problems for the delamination grouting. Summary of the invention

[0005] In order to solve the technical problems raised in the background technology, the present invention provides a grouting prevention and control device for grouting of overburden separation layer in mines.

[0006] The present invention is implemented by the following technical scheme: a grouting prevention and control device for grouting of overburden separation in a mine, comprising a sealing mechanism 1 arranged in the middle of a casing and a sealing mechanism 2 installed at the connection between two casings.

[0007] The sealing mechanism comprises a cylindrical sleeve which can rotate relative to the outside of the sleeve, an annular groove is arranged in the middle of the sleeve, an elastic skin is arranged at the notch of the annular groove, the elastic skin seals the annular groove to form an air cavity, and an air passage connected to the air cavity is arranged in the sleeve, one end of the air passage is an air inlet; a power mechanism is also arranged on the sleeve, and the power mechanism drives the sleeve to rotate along the sleeve.

[0008] The sealing mechanism also includes a hole expansion mechanism arranged on the outside of the sleeve to form an expanded portion with a larger cross-sectional diameter in the grouting hole, and the hole expansion mechanism cooperates with the elastic skin to block the grouting hole.

[0009] The second sealing mechanism blocks the grouting hole at the connection between the two casings.

[0010] As a further improvement of the above scheme, several hole expanding mechanisms are distributed along the circumference of the sleeve, and the hole expanding mechanisms include arc-shaped movable plates. The two ends of the movable plates in adjacent hole expanding mechanisms can fit tightly, and the curvature of the movable plates is the same as the curvature of the sleeve and the grouting hole. In the vertical direction, the top of the movable plate is higher than the top surface of the sleeve, and the bottom end is lower than the bottom surface of the sleeve. Connecting parts are provided in the middle of both ends of the movable plate, and mounting holes are opened on the connecting parts. A rotating shaft is installed at the mounting holes. A mounting block rotatably connected to the rotating shaft is fixed on the outside of the sleeve. A driving mechanism for driving each movable plate to rotate along the rotating shaft is also provided on the sleeve. The driving mechanism drives each movable plate to rotate synchronously, and the sleeve rotates relative to the casing to form an expansion portion on the inner wall of the grouting hole.

[0011] As a further improvement of the above scheme, the connecting part and the movable plate can slide relative to each other along the radial direction of the sleeve, wherein a plug-in groove is provided on the inner side of the movable plate, a connecting rod slidably inserted into the plug-in groove is fixed on the connecting part, a guide groove is provided in the plug-in groove along its depth direction, and a guide part slidingly matched with the guide groove is provided on the outer side of the connecting rod, so that the connecting rod can only slide along the depth direction of the plug-in groove, and a return spring is installed in the guide groove.

[0012] As a further improvement of the above scheme, a number of abutment mechanisms are distributed on the inner side of the movable plate to contact the expanded elastic skin, thereby pushing the movable plate to fit against the inner wall of the expanded portion, and the abutment mechanism includes a push rod and a pressure plate, wherein the push rod is connected to the inner side of the movable plate, and the pressure plate is fixed at the other end of the push rod, and the pressure plate is an arc-shaped plate to facilitate fitting and contacting with the surface of the elastic skin.

[0013] As a further improvement of the above scheme, a center hole for the sleeve to pass through is opened in the middle of the sleeve, an annular groove is opened in the outer wall of the sleeve along the circumferential direction, and a positioning pin is provided on the inner wall of the sleeve. The positioning pin can be movably clamped in the annular groove so that the sleeve and the sleeve are relatively fixed in the axial direction, and a servo motor is provided on the inner side of the sleeve, and the output shaft of the servo motor is connected to a spur gear, and the outer wall of the sleeve is provided with a gear ring meshing with the spur gear to drive the sleeve to rotate around the sleeve.

[0014] As a further improvement of the above solution, elastic expansion units are provided at both ends of the movable plate, so that circumferential sealing can be achieved when the movable plate is in contact with the inner wall of the enlarged portion.

[0015] As a further improvement of the above scheme, the elastic telescopic unit includes a mounting groove opened at the end of the movable plate, a plurality of internal elastic parts arranged in the mounting groove, and a telescopic sealing plate connected to the internal elastic parts. The telescopic sealing plate has an inner end inserted in the mounting groove and connected to the internal elastic part, and an outer end located outside the mounting groove. The thickness and height of the outer end are consistent with the main body of the movable plate. Both ends of the outer end have tails extending toward the middle of the movable plate. The top and bottom surfaces of the end of the movable plate are respectively provided with tail grooves that can cooperate with the tail, and the width of the tail is consistent with the thickness of the movable plate.

[0016] As a further improvement of the above solution, the internal elastic member is a columnar spring.

[0017] As a further improvement of the above scheme, the second sealing mechanism includes an elastic skin second and an annular docking port opened on the end face of the sleeve. Both ends of the elastic skin second have flanges, which are detachably fixed by a fixing mechanism and the sleeve, and the outer surfaces of the elastic skin second and the sleeve form an annular cavity, which is connected to the annular cavity and the annular docking port through a through hole initially formed on the sleeve, and the other end of the docking tube has a docking head that can be plugged into one end of the plug-in tube of the annular docking port, and the end is also provided with an annular boss that can be spirally connected to the annular docking port, and the top of the annular boss is rotatably connected to an annular extrusion portion, so that the extrusion portion gradually extends into the annular docking port to achieve pressurization of the inside of the annular cavity.

[0018] As a further improvement of the above scheme, the fixing mechanism includes an annular groove opened on the outer surface of the sleeve, and a compression sleeve movably installed in the annular groove. The compression sleeve can compress the flange, and a locking clamp can be provided on the outside of the compression sleeve for fixing.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention provides a grouting prevention and control device for grouting of overburden rock separation in a mine, comprising a sealing mechanism 1 arranged in the middle of a casing and a sealing mechanism 2 installed at the connection between two casings.

[0021] The sealing mechanism 1 proposed by the present invention includes a cylindrical sleeve that can rotate relative to the outer side of the sleeve, an annular groove is arranged in the middle of the sleeve, an elastic skin 1 is arranged at the notch of the annular groove, the elastic skin 1 seals the annular groove to form an air cavity, and an air passage connected to the air cavity is arranged in the sleeve, one end of the air passage is an air inlet; a power mechanism is also arranged on the sleeve, and the power mechanism drives the sleeve to rotate along the sleeve. The sealing mechanism 1 also includes a hole expansion mechanism arranged on the outer side of the sleeve to form an enlarged portion with a larger cross-sectional diameter in the grouting hole, and the hole expansion mechanism cooperates with the elastic skin 1 to block the grouting hole.

[0022] The second sealing mechanism proposed by the present invention blocks the grouting hole at the connection between the two sleeves.

[0023] Through the above structure, the grouting holes can be effectively sealed, avoiding the waste of slurry and improving the effect of delamination grouting, thereby improving the safety of the mining area. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional diagram of the sleeve and the sealing mechanism 1 proposed by the present invention;

[0025] Figure 2 This is a schematic diagram of the structure when the movable plate of the sealing mechanism 1 proposed by the present invention rotates to form a complete ring;

[0026] Figure 3 This is a schematic diagram of the structure of the sealing mechanism 1 proposed by the present invention after the movable plate rotates a certain angle;

[0027] Figure 4 For the present invention Figure 2 A magnified image of point A;

[0028] Figure 5 For the present invention Figure 2 The enlarged view of point B;

[0029] Figure 6 It is a structural schematic diagram of the sleeve and the second sealing mechanism in Embodiment 2 of the present invention;

[0030] Figure 7 For the present invention Figure 6 Enlarged view of point C.

[0031] Figure 8 A schematic diagram of the structure of the movable plate proposed by the present invention;

[0032] Fig. 9 This is a three-dimensional diagram of the local structure at the corner of the movable panel proposed by the present invention.

[0033] Description of main symbols:

[0034] In the figure: sleeve 1, sleeve 2, movable plate 3, connecting part 301, plug-in slot 302, tail slot 303, transmission gear 4, mounting block 5, rotating shaft 6, notch 7, driving gear 8, driving motor 9, annular sleeve 10, elastic skin 11, expansion part 12, mounting gear 13, push rod 14, pressure plate 1401, grouting hole 15, guide part 16, return spring 17, connecting plug rod 19, internal elastic part 20, mounting slot 21, telescopic sealing plate 22, inner end 221, outer end 222, tail 223, docking head 23, annular groove 24, clamping sleeve 25, locking hoop 26, elastic skin 27, through hole 28, annular boss 29, extrusion part 30, flange 31. DETAILED DESCRIPTION

[0035] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0036] Embodiment 1:

[0037] Reference Figure 1-5 8-9. The present invention proposes a grouting prevention and control device for grouting of overburden separation in a mine, comprising a sealing mechanism 1 arranged in the middle of the casing 1 and a sealing mechanism 2 installed at the connection between the two casings 1.

[0038] The sealing mechanism 1 includes a cylindrical sleeve 2 that can rotate relative to the outside of the sleeve 1. An annular groove is arranged in the middle of the sleeve 2. The annular groove is not marked with a number in the accompanying drawings, but it does not affect the understanding of the present scheme by technical personnel in this field. An elastic skin 11 is arranged at the notch of the annular groove. The elastic skin 11 seals the annular groove to form an air cavity, and an air passage connected to the air cavity is arranged in the sleeve 2, and one end of the air passage is an air inlet; a power mechanism is also arranged on the sleeve 2, and the power mechanism drives the sleeve 2 to rotate along the sleeve 1.

[0039] The sealing mechanism 1 also includes a hole expansion mechanism arranged on the outside of the sleeve 2 to form an expanded portion 12 with a larger cross-sectional diameter in the grouting hole 15, and the hole expansion mechanism cooperates with the elastic skin 11 to block the grouting hole.

[0040] Since the inner wall of the grouting hole is not smooth after it is formed, if it is directly sealed with a sealer, leakage is likely to occur and the effect of preventing grouting is poor. For this reason, a hole expansion mechanism is used to form an enlarged portion with a smooth inner wall inside the grouting hole. At this time, sealing at the enlarged portion can play a better role in preventing grouting and has better sealing.

[0041] In this solution, the second sealing mechanism blocks the grouting hole 15 at the connection between the two sleeves 1 .

[0042] As an optional embodiment of the present invention, several reaming mechanisms are distributed along the circumference of the sleeve 2, and the reaming mechanisms include arc-shaped movable plates 3. The two ends of the movable plates 3 in adjacent reaming mechanisms can fit tightly, and the curvature of the movable plates 3 is the same as the curvature of the sleeve 2 and the grouting hole 15. In the vertical direction, the top of the movable plate 3 is higher than the top surface of the sleeve 2, and the bottom end is lower than the bottom surface of the sleeve 2. A connecting portion 301 is provided in the middle of both ends of the movable plate 3, and a mounting hole is opened on the connecting portion 301. A rotating shaft 6 is installed at the mounting hole. A mounting block 5 rotatably connected to the rotating shaft 6 is fixed on the outer side of the sleeve 2. A driving mechanism for driving each movable plate 3 to rotate along the rotating shaft 6 is also provided on the sleeve 2. The driving mechanism drives each movable plate 3 to rotate synchronously, and the sleeve 2 rotates relative to the casing 1 to form an enlarged portion 12 on the inner wall of the grouting hole 15.

[0043] The driving mechanism includes an annular sleeve 10 rotatably connected to the top surface of the sleeve 2, a gear ring is arranged on the outer wall of the annular sleeve 10, a driving motor 9 is fixed to the outer side of the sleeve 2, and a driving gear 8 is connected to the output end of the driving motor 9, and the driving gear 8 is meshed with the gear ring.

[0044] Specific reference Figure 2 When the movable plate 3 rotates to the state shown, a gap is left between the outer surface of the movable plate and the inner wall of the grouting hole. During the specific operation, the driving motor 9 drives the driving gear 8 to rotate, so that the annular sleeve rotates, thereby driving the movable plate 3 to rotate. Since the end of the movable plate 3 will conflict with the inner wall of the grouting hole, the movable sleeve is kept rotating counterclockwise. A tool is set at the end of the movable plate 3, and its end is hardened. In this way, the diameter of the expanded part becomes larger and larger due to grouting until the driving motor stops working. At this time, a shape as shown in FIG. Figure 3 The structure in .

[0045] In this solution, the connecting part 301 and the movable plate 3 can slide relative to each other along the radial direction of the sleeve 2, wherein the inner side of the movable plate 3 is provided with a plug-in slot 302, a connecting rod 19 that is slidably inserted into the plug-in slot 302 is fixed on the connecting part 301, a guide slot is provided in the plug-in slot 302 along its depth direction, and a guide part 16 that slides with the guide slot is provided on the outer side of the connecting rod 19, so that the connecting rod 19 can only slide along the depth direction of the plug-in slot 302, and a return spring 17 is installed in the guide slot. The above structure facilitates the movable plate 3 to slide along the radial direction of the sleeve 2, so that the outer surface of the movable plate 3 fits on the inner wall of the enlarged portion formed by it.

[0046] There are several abutment mechanisms distributed on the inner side of the movable plate 3 to contact the expanded elastic skin 11, so as to push the movable plate 3 to fit against the inner wall of the expansion part 12. The abutment mechanism includes a push rod 14 and a pressure plate 1401, wherein the push rod 14 is connected to the inner side of the movable plate 3, and the pressure plate 1401 is fixed to the other end of the push rod 14. The pressure plate 1401 is an arc-shaped plate to facilitate the contact with the surface of the elastic skin.

[0047] The middle of the sleeve 2 is provided with a central hole for the sleeve 1 to pass through (refer to Figure 1 ), an annular groove is opened on the outer wall of the sleeve 1 along the circumferential direction, and the center hole and the annular groove are not indicated by numbers in the accompanying drawings, but it does not affect the understanding of the present solution by those skilled in the art. A locating pin is arranged on the inner wall of the sleeve 2, and the locating pin can be movably arranged in the annular groove so that the sleeve 2 and the sleeve 1 are relatively fixed in the axial direction, and a servo motor is arranged on the inner side of the sleeve 2, and the output shaft of the servo motor is connected to a spur gear, and the outer wall of the sleeve 1 is provided with a gear ring meshing with the spur gear to drive the sleeve 2 to rotate around the sleeve 1.

[0048] Specific reference Figure 5Both ends of the movable plate 3 are provided with elastic expansion units, so that when the movable plate 3 is in contact with the inner wall of the enlarged portion 12, circumferential sealing can be achieved.

[0049] The elastic telescopic unit includes a mounting groove 21 opened at the end of the movable plate 3, a plurality of internal elastic members 20 arranged in the mounting groove 21, and a telescopic sealing plate 22 connected to the internal elastic member 20. The telescopic sealing plate 22 has an inner end 221 inserted in the mounting groove 21 and connected to the internal elastic member 20, and an outer end 222 located outside the mounting groove 21. The thickness and height of the outer end 222 are consistent with the main body of the movable plate 3. Both ends of the outer end 222 extend with a tail 223 toward the middle of the movable plate 3. The top surface and bottom surface of the end of the movable plate 3 are respectively provided with a tail groove 303 that can cooperate with the tail 223. The width of the tail 223 is consistent with the thickness of the movable plate 3.

[0050] In this solution, the internal elastic member 20 is a columnar spring.

[0051] Embodiment 2:

[0052] Reference Figure 6 , Figure 7 As an optional embodiment of the present invention, the second sealing mechanism includes an elastic skin 27 and an annular docking port opened on the end face of the sleeve 1. Both ends of the elastic skin 27 have flanges 31. The flanges 31 are detachably fixed to the sleeve 1 through a fixing mechanism, and the elastic skin 27 and the outer surface of the sleeve form an annular cavity. The annular cavity and the annular docking port are connected through a through hole 28 initially formed on the sleeve 1. The other end of the docking tube 1 has a docking head 23 that can be plugged into one end of the plug-in tube 1 of the annular docking port. The end is also provided with an annular boss 29 that can be spirally connected to the annular docking port. The top of the annular boss 29 is rotatably connected to an annular extrusion portion 30, so that the extrusion portion 30 gradually extends into the annular docking port to achieve pressurization of the inside of the annular cavity.

[0053] The fixing mechanism includes an annular groove 24 formed on the outer surface of the sleeve 1 and a compression sleeve 25 movably mounted on the annular groove 24 . The compression sleeve 25 can compress the flange 31 , and a locking clamp 26 can be provided on the outer side of the compression sleeve 25 for fixing.

[0054] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A grouting prevention and control device for grouting of overburden separation layer in a mine, characterized in that: It comprises a sealing mechanism 1 arranged in the middle of the sleeve and a sealing mechanism 2 installed at the connection between the two sleeves; The sealing mechanism 1 comprises a cylindrical sleeve that can rotate relative to the outer side of the sleeve, an annular groove is arranged in the middle of the sleeve, an elastic skin 1 is arranged at the notch of the annular groove, the elastic skin 1 seals the annular groove to form an air cavity, and an air passage connected to the air cavity is arranged in the sleeve, one end of the air passage is an air inlet; a power mechanism is also arranged on the sleeve, and the power mechanism drives the sleeve to rotate along the sleeve; The sealing mechanism 1 also includes a hole expansion mechanism arranged outside the sleeve to form an expanded portion with a larger cross-sectional diameter in the grouting hole, and the hole expansion mechanism cooperates with the elastic skin 1 to block the grouting hole; The second sealing mechanism blocks the grouting hole at the connection point of the two sleeves.

2. The grouting prevention and control equipment for grouting in overburden separation layer of a mine as claimed in claim 1, characterized in that: The reaming mechanisms are distributed in a plurality of manners along the circumference of the sleeve, and the reaming mechanisms include arc-shaped movable plates. The two ends of the movable plates in adjacent reaming mechanisms can fit tightly together. The curvature of the movable plates is the same as the curvature of the sleeve and the grouting hole. In the vertical direction, the top end of the movable plate is higher than the top surface of the sleeve, and the bottom end thereof is lower than the bottom surface of the sleeve. Connecting parts are provided in the middle of both ends of the movable plates, and mounting holes are provided on the connecting parts. A rotating shaft is installed at the mounting holes. A mounting block rotatably connected to the rotating shaft is fixed on the outside of the sleeve. A driving mechanism for driving each movable plate to rotate along the rotating shaft is also provided on the sleeve. The driving mechanism drives each movable plate to rotate synchronously, and the sleeve rotates relative to the casing to form an expansion part on the inner wall of the grouting hole.

3. The grouting prevention and control equipment for grouting in overburden separation layer of a mine as claimed in claim 2, characterized in that: The connecting part and the movable plate can slide relative to each other along the radial direction of the sleeve, wherein a plug-in groove is provided on the inner side of the movable plate, a connecting rod slidably inserted into the plug-in groove is fixed on the connecting part, a guide groove is provided in the plug-in groove along its depth direction, and a guide part slidingly matched with the guide groove is provided on the outer side of the connecting rod, so that the connecting rod can only slide along the depth direction of the plug-in groove, and a return spring is installed in the guide groove.

4. The grouting prevention and control equipment for grouting in overburden separation layer of a mine as claimed in claim 3, characterized in that: A plurality of abutment mechanisms are distributed on the inner side of the movable plate to contact the expanded elastic skin, thereby pushing the movable plate to fit against the inner wall of the expanded portion. The abutment mechanism includes a push rod and a pressure plate, wherein the push rod is connected to the inner side of the movable plate, and the pressure plate is fixed to the other end of the push rod. The pressure plate is an arc-shaped plate so as to facilitate fitting and contacting with the surface of the elastic skin.

5. The grouting prevention and control equipment for grouting in overburden separation layer of a mine as claimed in claim 4, characterized in that: A center hole is provided in the middle of the sleeve for the sleeve to pass through, an annular groove is provided on the outer wall of the sleeve along the circumferential direction, a positioning pin is provided on the inner wall of the sleeve, and the positioning pin can be movably clamped in the annular groove so that the sleeve and the sleeve are relatively fixed in the axial direction, and a servo motor is provided on the inner side of the sleeve, the output shaft of the servo motor is connected to a spur gear, and the outer wall of the sleeve is provided with a gear ring meshing with the spur gear to drive the sleeve to rotate around the sleeve.

6. The grouting prevention and control equipment for grouting in overburden separation layer of a mine as claimed in claim 5, characterized in that: Both ends of the movable plate are provided with elastic expansion units, so that when the movable plate is in contact with the inner wall of the enlarged portion, circumferential sealing can be achieved.

7. The grouting prevention and control equipment for grouting in overburden separation layer of a mine as claimed in claim 6, characterized in that: The elastic telescopic unit includes a mounting groove opened at the end of the movable plate, a plurality of internal elastic parts arranged in the mounting groove, and a telescopic sealing plate connected to the internal elastic parts. The telescopic sealing plate has an inner end inserted in the mounting groove and connected to the internal elastic part, and an outer end located outside the mounting groove. The thickness and height of the outer end are consistent with the movable plate body, and both ends of the outer end extend with tails toward the middle of the movable plate. The top surface and bottom surface of the end of the movable plate are respectively provided with tail grooves that can cooperate with the tail, and the width of the tail is consistent with the thickness of the movable plate.

8. The grouting prevention and control equipment for grouting in overburden separation layer of a mine as claimed in claim 7, characterized in that: The internal elastic member is a columnar spring.

9. The grouting prevention and control equipment for grouting in overburden separation layer of a mine as claimed in claim 1, characterized in that: The second sealing mechanism includes an elastic skin second and an annular docking port opened on the end face of the sleeve. Both ends of the elastic skin second have flanges, which are detachably fixed by a fixing mechanism and the sleeve. The elastic skin second and the outer surface of the sleeve form an annular cavity. The annular cavity and the annular docking port are connected through a through hole initially formed on the sleeve. The other end of the docking tube has a docking head that can be plugged into one end of the plug-in tube of the annular docking port. The end is also provided with an annular boss that can be spirally connected to the annular docking port. The top of the annular boss is rotatably connected to an annular extrusion portion, so that the extrusion portion gradually extends into the annular docking port to achieve pressurization of the inside of the annular cavity.

10. The grouting prevention and control equipment for grouting in overburden separation layer of a mine as claimed in claim 9, characterized in that: The fixing mechanism comprises an annular groove formed on the outer surface of the sleeve, a compression sleeve movably mounted on the annular groove, the compression sleeve can compress the flange, and a locking clamp can be provided on the outer side of the compression sleeve for fixing.

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