CN113137495B

CN113137495B - Anti-blocking mud ball valve for shield tunneling machine

Info

Publication number: CN113137495B
Application number: CN202110503991.5A
Authority: CN
Inventors: 王春; 巩文彬; 陈磊; 顾洪霞; 李文东
Original assignee: Anhui Tongdu Flow Technology Co ltd
Current assignee: Anhui Tongdu Flow Technology Co ltd
Priority date: 2021-05-08
Filing date: 2021-05-08
Publication date: 2023-07-04
Anticipated expiration: 2041-05-08
Also published as: CN113137495A

Abstract

The invention provides an anti-blocking mud ball valve for a shield tunneling machine, which relates to the technical field of tunneling and comprises a motor and a valve body, wherein the bottom of the motor is fixedly connected with a bottom frame, the top of the valve body is fixedly connected with a first connecting pipe, the bottom of the valve body is fixedly connected with a second connecting pipe, the top of the first connecting pipe is fixedly connected with a top frame, and the bottom of the bottom frame is fixedly connected with the top of the top frame through bolts. According to the invention, through the arranged dredging motor, the dredging rod, the telescopic rod and the scraping blade, when the inner cavity of the valve body is blocked, the dredging motor is started, the dredging rod can be jacked up and rapidly rotated by the dredging motor, when the dredging rod rapidly rotates, the scraping blade on the outer wall of the dredging rod can be unfolded under the action of centrifugal force, so that the mud and the dirt in the inner cavity of the valve body are broken up, finally, the water flow can wash the broken mud and dirt cleanly by opening the valve cover through the motor, and the accumulation of the mud and the dirt in the inner cavity of the valve body are prevented from blocking the valve body.

Description

Anti-blocking mud ball valve for shield tunneling machine

Technical Field

The invention relates to the technical field of tunnel tunneling, in particular to an anti-blocking mud ball valve for a shield tunneling machine.

Background

The ball valve, the opening and closing piece (sphere) is driven by the valve rod and rotates around the axis of the ball valve. The device can also be used for regulating and controlling fluid, wherein the hard seal V-shaped ball valve has strong shearing force between the V-shaped ball core and the metal valve seat of the hard alloy for surfacing, and is particularly suitable for mediums containing fibers, tiny solid particles and the like. The multi-way ball valve can flexibly control the confluence, the diversion and the flow direction switching of the medium on the pipeline, and simultaneously can close any channel to connect the other two channels. The valve should be installed generally horizontally in the pipeline. The ball valve is divided into: pneumatic ball valve, electric ball valve, manual ball valve.

Among the prior art, a mud ball valve for shield constructs quick-witted, the patent application number of disclosure is 201910375379.7, the valve body lower extreme is equipped with the bottom in the through-hole department lid to wear to be equipped with the back shaft in this through-hole inside, this spheroid lower extreme the counter bore bottom be connected with the thrust pad, the valve body upper end is connected with the supporting sleeve in through-hole department, this supporting sleeve is hollow structure, it passes and communicates the valve body, gland, link and drive arrangement have been connected gradually from bottom to top to the top of supporting sleeve, it is through adopting the upper and lower bearing structure that supporting sleeve and back shaft constitute, support the spheroid in the valve pocket in the middle of the valve pocket, when realizing that the valve does on-off control, bear the thrust to the spheroid with the pressure of mud medium, avoided the valve rod to receive the side thrust from the spheroid, the wearing and tearing of valve rod have been alleviateed greatly, the possibility that the valve rod receives stress concentration and fracture appears in the local wearing and tearing has been avoided.

But it has only solved mud medium and valve rod department friction and has led to the cracked problem of valve rod, and mud medium also will rub with the spheroid outer wall when passing in the valve body, and mud medium rubs the spheroid surface for a long time can, thereby leads to the unable tight closure of spheroid to appear the seepage phenomenon, and increases the part and can reduce the mud passageway in the valve body, and then the problem of the more easy mud jam valve body that appears.

Disclosure of Invention

The invention aims to solve the defects in the prior art, the problem that the valve body is blocked by mud because the mud medium rubs the surface of the ball body for a long time, so that the ball body cannot be tightly closed to generate a leakage phenomenon, and the mud channel is reduced by adding parts in the valve body is solved, so that the problem that the valve body is blocked by mud is more easily generated.

In order to achieve the above purpose, the present invention adopts the following technical scheme: the utility model provides a prevent blockking up mud ball valve for shield constructs machine, includes motor and valve body, the bottom fixedly connected with chassis of motor, the top fixedly connected with first connecting pipe of valve body, the bottom fixedly connected with second connecting pipe of valve body, the top fixedly connected with roof-rack of first connecting pipe, the bottom of chassis passes through bolt fixed connection with the top of roof-rack, the bottom grafting of motor has the valve rod, the inner wall swing joint of valve body has the valve gap, the equal fixedly connected with connecting piece in upper and lower both ends of valve gap, one side swing joint that the valve gap kept away from the valve body has the bolster, one side fixedly connected with circle protruding piece that the valve gap is close to the valve body is located the top of connecting piece at valve gap top is pegged graft with the bottom of valve rod, be located the bottom of connecting piece of valve gap bottom is pegged graft there is the locating lever, the top outer wall of locating lever and the inner wall swing joint of second connecting pipe, the bottom outer wall of locating lever has cup jointed the leak protection piece, the inner wall grafting of locating lever has the valve rod, the outer wall uniform swing joint of doctor blade has the bottom fixedly connected with of motor, the bottom fixedly connected with flexible mediation pole of the bottom flexible mediation pole.

As a preferred implementation mode, a water outlet is formed in one side of the valve body, a water inlet is formed in the other side of the valve body, and sealing rings are clamped on the inner walls of the water outlet and the water inlet.

As a preferred implementation mode, the inner wall of one side of the water outlet is sleeved with a ring, one side of the ring close to the valve cover is uniformly and movably connected with a clamping spring, one end of the clamping spring close to the valve cover is fixedly connected with a buffer ring, and one side of the buffer ring close to the valve cover is fixedly connected with a sealing ring.

As a preferred implementation mode, the top of valve rod has evenly cup jointed first rubber ring, the outer wall of first rubber ring and the top inner wall swing joint of first connecting pipe, the top joint of first rubber ring has the clamp piece, the bottom inner wall of clamp piece and the top inner wall swing joint of first connecting pipe, the top of clamp piece passes through bolt fixed connection with the top upper surface of first connecting pipe.

As a preferred implementation mode, the outer wall of leak protection spare cup joints with the bottom inner wall of second connecting pipe, the bottom fixedly connected with bottom of leak protection spare, the lower surface of locating lever and the upper surface fixed connection of bottom, the bottom outer wall of dredging the pole is pegged graft there is the inner wall of bottom, the lower surface fixed connection of bottom has the telescopic link, the upper surface of bottom passes through bolt fixed connection with the lower surface of second connecting pipe.

As a preferred implementation mode, the top fixedly connected with top piece of mediation pole, the outer wall of top piece has cup jointed leak protection ring cover, the outer wall of top piece, leak protection ring cover all with the inner wall swing joint of locating lever.

As a preferred implementation mode, one side of the valve cover, which is far away from the valve body, is symmetrically provided with elastic sheets, the inner wall of the valve cover, which is far away from the valve body, is uniformly provided with a diversion trench, one end of the elastic sheet, which is far away from the valve body, is fixedly connected with a buffer piece, and the outer wall of the circular protruding piece is sleeved with a second rubber ring.

Compared with the prior art, the invention has the advantages and positive effects that,

1. according to the invention, through the buffer ring, the sealing ring and the clamping spring, when the round convex part at one side of the valve cover is in contact with the buffer ring, the clamping spring at the rear end of the buffer ring is pressed and shortened, so that abrasion after the round convex part collides with the buffer ring is avoided, when the round convex part is sleeved with the buffer ring, the clamping spring can squeeze the buffer ring and the round convex part, so that the round convex part and the buffer ring are tightly attached, water leakage caused by friction damage at the round convex part and the buffer ring is avoided, the service life of the valve cover is prolonged, the clamping spring and the sealing ring can absorb impact force from a water hammer effect, and damage caused by direct collision of the round convex part of the valve cover and the water outlet is avoided.

2. According to the invention, through the buffer ring, the flow disturbing groove and the valve cover, the water hammer effect is generated at the moment when the valve cover closes the water outlet, the buffer piece is pressed and moves towards one side of the elastic piece when water flow impacts one side of the valve cover, the elastic piece is compressed to eliminate the water hammer, the impact friction between the valve cover and the water outlet is prevented, the buffer piece can rotate due to the impact of the water flow when the water flow acts on one side of the buffer piece, the mud in the inner cavity of the valve body is scattered, meanwhile, the water flow can be disturbed at the flow disturbing groove, the impact effect of the water flow on the mud in the inner cavity is enlarged, the mud is prevented from being deposited or adhered to the inner cavity of the valve body, and the possibility of blocking the valve body is further reduced.

3. According to the invention, through the arranged dredging motor, the dredging rod, the telescopic rod and the scraping blade, when the inner cavity of the valve body is blocked, the dredging motor is started, the dredging rod can be jacked up and rapidly rotated by the dredging motor, when the dredging rod rapidly rotates, the scraping blade on the outer wall of the dredging rod can be unfolded under the action of centrifugal force, so that the mud and the dirt in the inner cavity of the valve body are broken up, finally, the water flow can wash the broken mud and dirt clean by opening the valve cover through the motor, and the phenomenon that the mud and the dirt in the inner cavity of the valve body are deposited and accumulated to block the valve body is avoided.

Drawings

FIG. 1 is a perspective view of a cross-section of an anti-clogging slurry ball valve for a shield machine according to the present invention;

FIG. 2 is a cross-sectional elevation view of an anti-clogging slurry ball valve for a shield machine in accordance with the present invention;

FIG. 3 is a cross-sectional side view of an anti-clogging slurry ball valve for a shield machine in accordance with the present invention;

fig. 4 is a perspective view showing the internal structure of a valve body of an anti-blocking slurry ball valve for a shield machine according to the present invention;

FIG. 5 is a perspective view of a dredging rod of an anti-blocking slurry ball valve for a shield machine;

FIG. 6 is an enlarged view at A in FIG. 2;

fig. 7 is a perspective view of a valve cover structure of an anti-blocking slurry ball valve for a shield machine according to the present invention;

fig. 8 is a cross-sectional elevation view of a valve cover of an anti-clogging slurry ball valve for a shield machine according to the present invention.

Legend description:

1. a motor; 2. a valve body; 10. a chassis; 25. a first connection pipe; 251. a top frame; 26. a valve stem; 4. a valve cover; 40. a connecting piece; 42. a buffer member; 41. a circular convex member; 27. a positioning rod; 23. a second connection pipe; 232. a leakage preventing member; 31. a dredging rod; 311. a wiper blade; 30. a telescopic rod; 3. dredging the motor; 22. a water outlet; 21. a water inlet; 20. a seal ring; 24. a ring; 243. a clamping spring; 241. a buffer ring; 242. a seal ring; 261. a first rubber ring; 262. a pressing member; 231. a bottom cover; 312. a top piece; 313. a leak-proof ring sleeve; 45. a spring plate; 43. a flow disturbing groove; 44. and a second rubber ring.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-8, the present invention provides a technical solution: the utility model provides an anti-blocking mud ball valve for shield constructs machine, which comprises a motor 1 and a valve body 2, the bottom fixedly connected with chassis 10 of motor 1, the top fixedly connected with of valve body 2 has first connecting pipe 25, the bottom fixedly connected with of valve body 2 has second connecting pipe 23, the top fixedly connected with roof-rack 251 of first connecting pipe 25, the bottom of chassis 10 passes through bolt fixed connection with the top of roof-rack 251, the first connecting pipe 25 at motor 1 and valve body 2 top passes through chassis 10 and roof-rack 251 fixed connection, prevent motor 1 drop at the during operation, the bottom of motor 1 has pegged graft valve rod 26, the inner wall swing joint of valve body 2 has valve gap 4, the upper and lower both ends of valve gap 4 are all fixedly connected with connecting piece 40, one side swing joint that valve gap 4 kept away from valve body 2 has cushioning piece 42, one side that valve gap 4 is close to valve body 2 is fixedly connected with circle protruding piece 41, the top of the connecting piece 40 positioned at the top of the valve cover 4 is spliced with the bottom of the valve rod 26, the valve rod 26 is driven to rotate by the motor 1 so as to control the valve cover 4 at the bottom of the valve rod 26 to deflect, the valve cover 4 is controlled to open and close a channel on the inner wall of the valve body 2, the bottom of the connecting piece 40 positioned at the bottom of the valve cover 4 is spliced with the positioning rod 27 so as to support the bottom of the valve cover 4 and prevent the valve cover 4 from loosening and falling, the top outer wall of the positioning rod 27 is movably connected with the inner wall of the second connecting pipe 23, the bottom outer wall of the positioning rod 27 is sleeved with the leakage-proof piece 232, the inner wall of the positioning rod 27 is spliced with the dredging rod 31, the outer wall of the dredging rod 31 is uniformly and movably connected with the scraping blade 311, the bottom of the dredging rod 31 is fixedly connected with the telescopic rod 30, the bottom of the telescopic rod 30 is fixedly connected with the dredging motor 3, the telescopic rod 30 is controlled by the dredging motor 3 to eject the dredging rod 31 out of the inner wall of the positioning rod 27, and then the rotary motion is performed in the cavity at the bottom of the valve body 2, the scraping blade 311 on the outer wall of the dredging rod 31 is unfolded by centrifugal force, and sundries in the cavity of the valve body 2 are scattered.

One side of the valve body 2 is provided with a water outlet 22, the other side of the valve body 2 is provided with a water inlet 21, the inner walls of the water outlet 22 and the water inlet 21 are respectively clamped with a sealing ring 20, and the sealing rings 20 can prevent leakage at the water outlet 22 or the water inlet 21 after the valve body 2 is installed.

The inner wall of one side of the water outlet 22 is sleeved with a ring piece 24, one side of the ring piece 24 close to the valve cover 4 is uniformly and movably connected with a clamping spring 243, one end of the clamping spring 243 close to the valve cover 4 is fixedly connected with a buffer ring 241, one side of the buffer ring 241 close to the valve cover 4 is fixedly connected with a sealing ring 242, when the valve cover 4 is closed, a circular convex piece 41 on one side of the valve cover 4 is in contact with the buffer ring 241, the clamping spring 243 at the rear end of the buffer ring 241 is pressed and shortened, abrasion after the circular convex piece 41 is impacted with the buffer ring 241 is avoided, after the circular convex piece 41 is sleeved with the buffer ring 241, the clamping spring 243 extrudes the buffer ring 241 and the circular convex piece 41, so that the circular convex piece 41 and the buffer ring 241 are attached tightly, and water seepage is prevented.

The top of valve rod 26 has evenly cup jointed first rubber ring 261, the outer wall of first rubber ring 261 and the top inner wall swing joint of first connecting pipe 25, the top joint of first rubber ring 261 has compressing tightly piece 262, compressing tightly the bottom inner wall of piece 262 and the top inner wall swing joint of first connecting pipe 25, compressing tightly the top of piece 262 and the top upper surface of first connecting pipe 25 through bolt fixed connection, through the height of adjustment compressing tightly piece 262, in order to reach the first rubber ring 261 with valve rod 26 top of its bottom and compress tightly the first rubber ring 261 after compressing tightly the deformation and hug closely with first connecting pipe 25 inner wall, avoid first connecting pipe 25 top department water leakage.

The outer wall of leak protection spare 232 cup joints with the bottom inner wall of second connecting pipe 23, the bottom fixedly connected with bottom 231 of leak protection spare 232, the lower surface of locating lever 27 and the upper surface fixed connection of bottom 231, the inner wall that has pegged graft bottom 231 is pegged graft to the bottom outer wall of mediation pole 31, the lower surface fixedly connected with telescopic link 30 of bottom 231, the upper surface of bottom 231 passes through bolt fixed connection with the lower surface of second connecting pipe 23, the bottom 231 is fixed leak protection spare 232, locating lever 27 and mediation pole 31 jack-up at second connecting pipe 23 lower surface, prevent leaking because of becoming flexible.

The top fixedly connected with top piece 312 of mediation pole 31, the outer wall of top piece 312 cup joints leak protection ring cover 313, and the outer wall of top piece 312, leak protection ring cover 313 all with the inner wall swing joint of locating lever 27, top piece 312 and leak protection ring cover 313 can avoid valve body 2 interior water to pass through the inner wall seepage of locating lever 27 when the inside wall of locating lever 27 has not been ejected out to mediation pole 31.

The valve gap 4 is kept away from one side symmetry of valve body 2 and is provided with shell fragment 45, and shell fragment 4 has evenly offered the disturbing groove 43 far away from the inner wall of valve body 2, the one end fixedly connected with bolster 42 far away from valve body 2 of shell fragment 45, the outer wall of circle protruding piece 41 has cup jointed second rubber ring 44, when valve gap 4 rotary displacement closed the delivery port 22 of valve body 2, can produce the water hammer effect because of the inertial effect of rear end rivers, rivers striking is in the bolster 42 one side of valve gap 4, bolster 42 is pressurized back to shell fragment 45 one side displacement, and compress shell fragment 45 in order to reach the purpose of eliminating the water hammer, prevent water hammer direct impact and valve gap 4, lead to valve gap 4 and delivery port 22 striking friction, and when rivers acted on bolster 42 one side, bolster 42 is rotated because of rivers impact, will be 2 inner chamber debris of the valve body are scattered, disturb groove 43 department also can make rivers take place the disturbing, enlarge the impact effect of rivers to interior intracavity debris.

The working principle of the embodiment is as follows: when the anti-blocking mud ball valve for the shield machine is used, firstly, according to the figures 1-8, when the anti-blocking mud ball valve is installed, the water inlet 21 is positioned at the outlet of a dredging pipeline and is connected with the outlet of the dredging pipeline through bolts, the position of the water outlet 22 is connected with the water inlet of the next pipeline through bolts, and then the motor 1 is electrified. When the ball valve needs to be closed, the motor 1 is opened, the motor 1 rotates the control valve rod 26 to enable the valve cover 4 at the bottom of the valve rod 26 to deflect at the position of the water outlet 22 in the rotating axial direction by taking the valve rod 26 as the rotating axial direction, the valve cover 4 is extruded with the outer wall of one side of the buffer ring 241 when the valve cover 4 deflects to close the outlet, when the round convex piece 41 at one side of the valve cover 4 is contacted with the buffer ring 241, the clamping spring 243 at the rear end of the buffer ring 241 is pressed and shortened, abrasion after the round convex piece 41 and the buffer ring 241 are impacted is avoided, and when the round convex piece 41 is sleeved with the buffer ring 241, the clamping spring 243 extrudes the buffer ring 241 and the round convex piece 41, so that the joint of the round convex piece 41 and the buffer ring 241 is tighter, and water leakage caused by friction damage at the position of the round convex piece 41 and the buffer ring 241 is avoided.

When the valve cover 4 closes the water outlet 22, the water flow at one end of the water inlet 21 continues to move forward due to inertia until impacting to one side of the valve cover 4, so that a water hammer effect is generated, when the water flow impacts one side of the valve cover 4, the buffer member 42 is pressed and then moves to one side of the elastic sheet 45, the elastic sheet 45 is compressed to achieve the purpose of eliminating the water hammer, the water hammer is prevented from directly impacting the valve cover 4, the valve cover 4 and the water outlet 22 are impacted and rubbed, and when the water flow acts on one side of the buffer member 42, the buffer member 42 rotates due to the impact of the water flow, the mud in the inner cavity of the valve body 2 is scattered, meanwhile, the water flow is disturbed by the position of the diversion trench 43, the impact of the water flow on the mud in the inner cavity is enlarged, the mud is prevented from being deposited or adhered to the inner cavity of the valve body 2, and the possibility of blocking the valve body 2 is further reduced.

When the inner cavity of the valve body 2 is blocked by mud, the bottom dredging motor 3 can be electrified, after the dredging motor 3 is started, the dredging motor 3 firstly ejects the inner wall of the positioning rod 27 through the telescopic rod 30 and drives the telescopic rod 30 and the dredging rod 31 at the top of the telescopic rod to rapidly rotate at the top of the inner cavity of the valve body 2, when the dredging rod 31 rapidly rotates, the scraping blade 311 on the outer wall of the dredging rod 31 can be unfolded under the action of centrifugal force to break up mud in the inner cavity of the valve body 2, after mud is broken up, the telescopic rod 30 and the dredging rod 31 at the top of the dredging rod can fall back again through the dredging motor 3, after the dredging motor 3 stops rotating the dredging rod 31, the scraping blade 311 falls down to cling to the outer wall of the dredging rod 31 under the action of self gravity until the dredging rod 31 is again retracted to the inner wall of the positioning rod 27, and finally, the motor 1 is opened to enable the water flow to be flushed clean by opening the valve cover 4.

The present invention is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present invention without departing from the technical content of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides an anti-blocking mud ball valve for shield constructs machine, includes motor (1) and valve body (2), its characterized in that: the bottom of motor (1) is fixedly connected with chassis (10), the top of valve body (2) is fixedly connected with first connecting pipe (25), the bottom of valve body (2) is fixedly connected with second connecting pipe (23), the top fixedly connected with roof-rack (251) of first connecting pipe (25), the bottom of chassis (10) and the top of roof-rack (251) pass through bolt fixed connection, the bottom of motor (1) is pegged graft and is had valve rod (26), the inner wall swing joint of valve body (2) has valve gap (4), the equal fixedly connected with connecting piece (40) in upper and lower both ends of valve gap (4), one side swing joint that valve gap (4) kept away from valve body (2) has bolster (42), one side that valve gap (4) are close to valve body (2) is fixedly connected with boss (41);

the top of a connecting piece (40) positioned at the top of the valve cover (4) is inserted with the bottom of the valve rod (26), the bottom of the connecting piece (40) positioned at the bottom of the valve cover (4) is inserted with a positioning rod (27), the top outer wall of the positioning rod (27) is movably connected with the inner wall of the second connecting pipe (23), a leakage-proof piece (232) is sleeved on the bottom outer wall of the positioning rod (27), a dredging rod (31) is inserted on the inner wall of the positioning rod (27), a scraping blade (311) is uniformly and movably connected with the outer wall of the dredging rod (31), a telescopic rod (30) is fixedly connected with the bottom of the dredging rod (31), and a dredging motor (3) is fixedly connected with the bottom of the telescopic rod (30);

the outer wall of the leakage prevention piece (232) is sleeved with the bottom inner wall of the second connecting pipe (23), a bottom cover (231) is fixedly connected to the bottom of the leakage prevention piece (232), the lower surface of the positioning rod (27) is fixedly connected with the upper surface of the bottom cover (231), the bottom outer wall of the dredging rod (31) is inserted with the inner wall of the bottom cover (231), the lower surface of the bottom cover (231) is fixedly connected with a telescopic rod (30), and the upper surface of the bottom cover (231) is fixedly connected with the lower surface of the second connecting pipe (23) through bolts;

one side symmetry that valve gap (4) kept away from valve body (2) is provided with shell fragment (45), just the inner wall that valve gap (4) kept away from valve body (2) evenly has offered chute (43), one end fixedly connected with bolster (42) that valve body (2) were kept away from to shell fragment (45), second rubber ring (44) have been cup jointed to the outer wall of protruding piece of circle (41).

2. The anti-clogging slurry ball valve for a shield machine according to claim 1, wherein: one side of the valve body (2) is provided with a water outlet (22), the other side of the valve body (2) is provided with a water inlet (21), and sealing rings (20) are clamped on the inner walls of the water outlet (22) and the water inlet (21).

3. The anti-clogging slurry ball valve for a shield machine according to claim 2, wherein: the inner wall of one side of the water outlet (22) is sleeved with a ring (24), one side of the ring (24) close to the valve cover (4) is uniformly and movably connected with a clamping spring (243), one end of the clamping spring (243) close to the valve cover (4) is fixedly connected with a buffer ring (241), and one side of the buffer ring (241) close to the valve cover (4) is fixedly connected with a sealing ring (242).

4. The anti-clogging slurry ball valve for a shield machine according to claim 1, wherein: the top of valve rod (26) has evenly cup jointed first rubber ring (261), the outer wall of first rubber ring (261) and the top inner wall swing joint of first connecting pipe (25), the top joint of first rubber ring (261) has compact heap (262), the bottom inner wall of compact heap (262) and the top inner wall swing joint of first connecting pipe (25), the top of compact heap (262) passes through bolt fixed connection with the top upper surface of first connecting pipe (25).

5. The anti-clogging slurry ball valve for a shield machine according to claim 1, wherein: the top fixedly connected with top piece (312) of mediation pole (31), leak protection ring cover (313) have been cup jointed to the outer wall of top piece (312), leak protection ring cover (313) all with the inner wall swing joint of locating lever (27).