CN113137495A

CN113137495A - A prevent blockking up mud ball valve for shield structure machine

Info

Publication number: CN113137495A
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: 2021-07-20
Anticipated expiration: 2041-05-08
Also published as: CN113137495B

Abstract

The invention provides an anti-blocking slurry ball valve for a shield machine, which relates to the technical field of tunnel excavation 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 arrangement of the dredging motor, the dredging rod, the telescopic rod and the scraping piece, when the inner cavity of the valve body is blocked by mud, 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 piece on the outer wall of the dredging rod can be unfolded under the action of centrifugal force, so that the mud in the inner cavity of the valve body is scattered, and finally, the valve cover is opened by the motor, so that water flow can wash the scattered mud cleanly, and the situation that the mud in the inner cavity of the valve body is accumulated to block the valve body is avoided.

Description

A prevent blockking up mud ball valve for shield structure machine

Technical Field

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

Background

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

In the prior art, a mud ball valve for a shield machine is disclosed in patent application No. 201910375379.7, a bottom cover is covered at a through hole at the lower end of a valve body, a support shaft penetrates through the through hole, the bottom of the counter bore at the lower end of the ball body is connected with a thrust pad, the upper end of the valve body is connected with a supporting sleeve at the through hole, the supporting sleeve is of a hollow structure, which penetrates through and is communicated with the valve body, a gland, a connecting frame and a driving device are sequentially connected above the supporting sleeve from bottom to top, the upper and lower support structures formed by the support sleeve and the support shaft support the ball in the valve cavity in the middle of the valve cavity, so that the thrust generated by the pressure of a slurry medium to the ball is realized when the valve is controlled to be opened and closed, the supporting structure is used for bearing, so that the valve rod is prevented from being subjected to lateral thrust from a sphere, the abrasion of the valve rod is greatly reduced, and the possibility that the valve rod is broken due to stress concentration caused by local abrasion is avoided.

But it has only solved the mud medium and has located the friction and lead to the cracked problem of valve rod with the valve rod, and the mud medium also will rub with the spheroid outer wall when passing through in the valve body, and the mud medium rubs meeting to the spheroid surface for a long time, thereby leads to the unable inseparable closed seepage phenomenon that appears of spheroid, and increases the part in the valve body and can reduce the mud passageway, and then changes the problem that mud blockked up the valve body.

Disclosure of Invention

The invention aims to solve the problems that in the prior art, the surface of a ball body is rubbed by a slurry medium for a long time, so that the ball body cannot be tightly closed, the leakage phenomenon occurs, and the slurry channel is reduced by adding parts in a valve body, so that the valve body is more easily blocked by slurry.

In order to achieve the purpose, the invention adopts the following technical scheme: an anti-blocking slurry ball valve for a shield machine comprises a motor and a valve body, wherein the bottom of the motor is fixedly connected with an underframe, the top of the valve body is fixedly communicated with a first connecting pipe, the bottom of the valve body is fixedly communicated with a second connecting pipe, the top of the first connecting pipe is fixedly connected with a top frame, the bottom of the underframe is fixedly connected with the top of the top frame through a bolt, the bottom of the motor is inserted with a valve rod, the inner wall of the valve body is movably connected with a valve cover, the upper end and the lower end of the valve cover are fixedly connected with connecting pieces, one side of the valve cover, which is far away from the valve body, is movably connected with a buffer piece, one side of the valve cover, which is close to the valve body, is fixedly connected with a round convex piece, the top of the connecting piece, which is positioned at the top of the valve cover, is inserted with the bottom of the valve rod, the bottom of the connecting piece, is inserted with a positioning rod, the outer wall of the top of the positioning rod is movably connected with the inner wall of the second connecting pipe, the anti-leakage device is connected to the outer wall of the bottom of the positioning rod in a sleeved mode, the dredging rod is connected to the inner wall of the positioning rod in an inserted mode, the scraping blade is evenly and movably connected to the outer wall of the dredging rod, the telescopic rod is fixedly connected to the bottom of the dredging rod, and the dredging motor is fixedly connected to the bottom of the telescopic rod.

As a preferred embodiment, one side of the valve body is provided with a water outlet, the other side of the valve body is provided with a water inlet, and the inner walls of the water outlet and the water inlet are all clamped with sealing rings.

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

As a preferred embodiment, the top of the valve rod is uniformly sleeved with a first rubber ring, the outer wall of the first rubber ring is movably connected with the inner wall of the top of the first connecting pipe, the top of the first rubber ring is clamped with a pressing piece, the inner wall of the bottom of the pressing piece is movably connected with the inner wall of the top of the first connecting pipe, and the top of the pressing piece is fixedly connected with the upper surface of the top of the first connecting pipe through a bolt.

As a preferred embodiment, the outer wall of the leakage-proof member is sleeved with the inner wall of the bottom of the second connecting pipe, the bottom of the leakage-proof member is fixedly connected with a bottom cover, the lower surface of the positioning rod is fixedly connected with the upper surface of the bottom cover, the inner wall of the bottom cover is inserted into the outer wall of the bottom of the dredging rod, the lower surface of the bottom cover is fixedly connected with a telescopic rod, and the upper surface of the bottom cover is fixedly connected with the lower surface of the second connecting pipe through a bolt.

As a preferred embodiment, the top of the dredging rod is fixedly connected with a top piece, the outer wall of the top piece is sleeved with a leakage-proof ring sleeve, and the outer walls of the top piece and the leakage-proof ring sleeve are movably connected with the inner wall of the positioning rod.

As a preferred embodiment, the valve cover is provided with the shell fragment from one side symmetry of valve body, just the valve cover is kept away from the inner wall of valve body and has evenly seted up the disturbed flow groove, the one end fixedly connected with bolster of valve body is kept away from to the shell fragment, the outer wall of protruding piece has cup jointed the second rubber ring.

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

1. according to the invention, through the arrangement of the buffer ring, the sealing ring and the clamping spring, when the circular convex part at one side of the valve cover is contacted with the buffer ring, the clamping spring at the rear end of the buffer ring is compressed and shortened, so that the circular convex part is prevented from being abraded after being impacted with the buffer ring, when the circular convex part is sleeved with the buffer ring, the clamping spring can extrude the buffer ring and the circular convex part, so that the circular convex part and the circular convex part are more tightly attached, water leakage caused by friction damage at the position of the circular 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 the circular convex part of the valve cover is prevented from being directly impacted with a water outlet to be damaged.

2. According to the valve cover, the buffering ring, the flow disturbing groove and the valve cover are arranged, so that a water hammer effect can be generated at the moment when the valve cover closes the water outlet, when water flow impacts one side of the valve cover, the buffering member is pressed and then moves towards one side of the elastic sheet, the elastic sheet is compressed to eliminate the water hammer, the water hammer is prevented from directly impacting the valve cover, the valve cover and the water outlet are impacted and rubbed, when the water flow acts on one side of the buffering member, the buffering member can rotate due to the impact of the water flow to break away dirt in an inner cavity of the valve body, meanwhile, the flow disturbing groove can disturb the water flow, the impact effect of the water flow on the dirt in the inner cavity is enlarged, the dirt is prevented from being deposited or adhered to the inner cavity of the valve body, and the possibility of blocking of the valve body is reduced.

3. According to the invention, through the arrangement of the dredging motor, the dredging rod, the telescopic rod and the scraping piece, when the inner cavity of the valve body is blocked by mud, 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 piece on the outer wall of the dredging rod can be unfolded under the action of centrifugal force, so that the mud in the inner cavity of the valve body is scattered, and finally, the valve cover is opened through the motor, so that water flow can wash the scattered mud cleanly, and the situation that the mud in the inner cavity of the valve body is deposited and accumulated to block the valve body is avoided.

Drawings

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

FIG. 2 is a cross-sectional elevation view of an anti-jam mud ball valve for a shield tunneling machine according to the present invention;

FIG. 3 is a cross-sectional side view of an anti-jam mud ball valve for a shield tunneling machine according to the present invention;

FIG. 4 is a perspective view of the internal structure of the valve body of the anti-clogging mud ball valve for the shield tunneling machine according to the present invention;

FIG. 5 is a perspective view of a dredge rod of the anti-clogging mud ball valve for a shield tunneling machine according to the present invention;

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

FIG. 7 is a perspective view of a valve cover structure of an anti-clogging mud ball valve for a shield tunneling machine according to the present invention;

FIG. 8 is a cross-sectional front view of a valve cover of an anti-clogging mud ball valve for a shield tunneling machine according to the present invention.

Illustration of the drawings:

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

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, the present invention provides a technical solution: an anti-blocking slurry ball valve for a shield machine comprises a motor 1 and a valve body 2, wherein the bottom of the motor 1 is fixedly connected with an underframe 10, the top of the valve body 2 is fixedly communicated with a first connecting pipe 25, the bottom of the valve body 2 is fixedly communicated with a second connecting pipe 23, the top of the first connecting pipe 25 is fixedly connected with a top frame 251, the bottom of the underframe 10 is fixedly connected with the top of the top frame 251 through bolts, the motor 1 is fixedly connected with the first connecting pipe 25 at the top of the valve body 2 through the underframe 10 and the top frame 251 to prevent the motor 1 from falling down during working, the bottom of the motor 1 is inserted with a valve rod 26, the inner wall of the valve body 2 is movably connected with a valve cover 4, the upper end and the lower end of the valve cover 4 are fixedly connected with connecting pieces 40, one side of the valve cover 4, which is far away from the valve body 2, is movably connected with a buffer piece 42, one side of the valve cover 4, which is close to the valve body 2, the top of the connecting piece 40 at the top of the valve cover 4 is inserted with the bottom of the valve rod 26, the valve rod 26 is driven to rotate by the motor 1, so that the valve cover 4 at the bottom of the control valve rod 26 deflects, the control valve cover 4 opens and closes a channel on the inner wall of the valve body 2, a positioning rod 27 is inserted at the bottom of a connecting piece 40 at the bottom of the valve cover 4 to support the bottom of the valve cover 4 and prevent the valve cover 4 from loosening and falling, the outer wall of the top of the positioning rod 27 is movably connected with the inner wall of a second connecting pipe 23, a leakage-proof piece 232 is sleeved on the outer wall of the bottom of the positioning rod 27, a dredging rod 31 is inserted on the inner wall of the positioning rod 27, the outer wall of the dredging rod 31 is uniformly and movably connected with a scraping piece 311, a telescopic rod 30 is fixedly connected at the bottom of the dredging rod 31, a dredging motor 3 is fixedly connected at the bottom of the telescopic rod 30, the dredging rod 31 is ejected out of the inner wall of the positioning rod 27 by the dredging rod 30 controlled by the dredging motor 3, then, the rotating movement is carried out in the cavity at the bottom of the valve body 2, so that the scraping piece 311 on the outer wall of the dredging rod 31 is unfolded due to the centrifugal force, and the sundries in the cavity of the valve body 2 are scattered.

One side of valve body 2 is provided with delivery port 22, and the opposite side of valve body 2 is provided with water inlet 21, and the equal joint of inner wall of delivery port 22, water inlet 21 has sealing washer 20, and sealing washer 20 can prevent that delivery port 22 or water inlet 21 department from taking place the seepage after valve body 2 installs.

The inner wall of one side of the water outlet 22 is sleeved with the ring member 24, one side of the ring member 24 close to the valve cover 4 is uniformly and movably connected with the clamping spring 243, one end of the clamping spring 243 close to the valve cover 4 is fixedly connected with the buffer ring 241, one side of the buffer ring 241 close to the valve cover 4 is fixedly connected with the sealing ring 242, when the valve cover 4 is closed, the circular convex part 41 at 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 compressed and shortened, abrasion after the circular convex part 41 is collided with the buffer ring 241 is avoided, after the circular convex part 41 is sleeved with the buffer ring 241, the clamping spring 243 can extrude the buffer ring 241 and the circular convex part 41, the two are attached more tightly, and water seepage is prevented.

First rubber ring 261 has evenly been cup jointed at valve rod 26's top, 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 a 262, the bottom inner wall that compresses tightly a 262 and the top inner wall swing joint of first connecting pipe 25, the top that compresses tightly a 262 and the top upper surface of first connecting pipe 25 pass through bolt fixed connection, compress tightly the height of a 262 through the adjustment, in order to reach and compress tightly the first rubber ring 261 and the valve rod 26 top of its bottom, compress tightly first rubber ring 261 and hug closely with first connecting pipe 25 inner wall after the deformation, avoid first connecting pipe 25 top department to leak water.

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

The top of the dredging rod 31 is fixedly connected with a top piece 312, the outer wall of the top piece 312 is sleeved with a leakage-proof ring sleeve 313, the outer walls of the top piece 312 and the leakage-proof ring sleeve 313 are movably connected with the inner wall of the positioning rod 27, and when the dredging rod 31 does not eject the inner wall of the positioning rod 27, the top piece 312 and the leakage-proof ring sleeve 313 can prevent water in the valve body 2 from leaking through the inner wall of the positioning rod 27.

The side of the valve cover 4 far away from the valve body 2 is symmetrically provided with elastic sheets 45, the inner wall of the valve cover 4 far away from the valve body 2 is uniformly provided with turbulent flow grooves 43, one end of the elastic sheet 45 far away from the valve body 2 is fixedly connected with a buffer member 42, the outer wall of the round convex member 41 is sleeved with a second rubber ring 44, when the valve cover 4 rotates and moves to close the water outlet 22 of the valve body 2, the inertia effect of the water flow at the rear end can generate a water hammer effect, the water flow impacts one side of the buffer member 42 of the valve cover 4, the buffer member 42 moves to one side of the elastic sheet 45 after being pressed, and the elastic sheet 45 is compressed to achieve the purpose of eliminating the water hammer, so as to prevent the water hammer from directly impacting the valve cover 4 to cause the impact friction between the valve cover 4 and the water outlet 22, when water flow acts on one side of the buffer piece 42, the buffer piece 42 rotates due to the impact of the water flow, so that sundries in the inner cavity of the valve body 2 are scattered, meanwhile, the turbulent groove 43 can disturb the water flow, so that the impact effect of the water flow on the impurities in the inner cavity is enlarged.

The working principle of the embodiment is as follows: when the anti-blocking mud ball valve for the shield machine is used, firstly, as shown in fig. 1-8, during installation, the water inlet 21 is positioned at the outlet of a dredging pipeline and connected with the outlet of the dredging pipeline through a bolt, the water outlet 22 is positioned at the water inlet of the next pipeline and connected with the bolt, and then the motor 1 is electrified. When the ball valve needs to be closed, the motor 1 is turned on, the motor 1 controls the valve rod 26 through rotation, the valve cover 4 at the bottom of the valve rod 26 is deflected towards the water outlet 22 by taking the valve rod 26 as a rotating shaft, the valve cover 4 is extruded with the outer wall of one side of the buffer ring 241 when the outlet is closed through deflection, when the circular convex part 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 circular convex part 41 collides with the buffer ring 241 is avoided, after the circular convex part 41 is sleeved with the buffer ring 241, the clamping spring 243 can extrude the buffer ring 241 and the circular convex part 41, the two parts are attached more tightly, and water leakage caused by friction damage at the positions of the circular convex part 41 and the buffer ring 241 is avoided.

When valve gap 4 closes delivery port 22 in the twinkling of an eye, water inlet 21 one end rivers then can continue forward because of inertia, until strikeing to valve gap 4 one side, thereby produce the water hammer effect, bolster 42 pressurized back displacement to shell fragment 45 one side when rivers impact valve gap 4 one side, and compress shell fragment 45 in order to reach the purpose of eliminating the water hammer, prevent water hammer vertical stroke and valve gap 4, lead to valve gap 4 and delivery port 22 striking friction, and rivers act on bolster 42 one side, bolster 42 can take place rotatoryly because of the rivers impact, break up 2 inner chamber dirt of valve body, it also can make rivers take place the confusion groove to disturb simultaneously 43 department, enlarge the impact of rivers to the inner chamber dirt, avoid the dirt deposit or bond at 2 inner chambers of valve body, and then reduced the possibility that valve body 2 blockked up.

When the inner cavity of the valve body 2 is blocked by dirt, the dredging motor 3 at the bottom can be electrified, after the dredging motor 3 is started, the dredging motor 3 firstly ejects out of the inner wall of the positioning rod 27 through the telescopic rod 30, and drives the expansion link 30 and the dredging rod 31 at the top of the expansion link to rotate rapidly at the top of the inner cavity of the valve body 2, when the dredging rod 31 rotates rapidly, the scraping piece 311 on the outer wall of the dredging rod 31 can be unfolded under the action of centrifugal force to break up the dirt in the inner cavity of the valve body 2, and after the dirt is broken up, the telescopic rod 30 and the dredging rod 31 at the top thereof can be dropped and retracted again by the dredging motor 3, after the dredging motor 3 stops rotating the dredging rod 31, the scraping piece 311 falls down to be tightly attached to the outer wall of the dredging rod 31 under the action of self gravity until the scraping piece is withdrawn to the inner wall of the positioning rod 27 along with the dredging rod 31 again, and finally the motor 1 opens the valve cover 4, so that the scattered mud and dirt can be flushed completely by water flow.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.

Claims

1. The utility model provides a prevent blockking up mud ball valve for shield constructs machine, includes motor (1) and valve body (2), its characterized in that: the bottom of the motor (1) is fixedly connected with an underframe (10), the top of the valve body (2) is fixedly communicated with a first connecting pipe (25), the bottom of the valve body (2) is fixedly communicated with a second connecting pipe (23), the top of the first connecting pipe (25) is fixedly connected with a top frame (251), the bottom of the underframe (10) is fixedly connected with the top of the top frame (251) through bolts, the bottom of the motor (1) is inserted with a valve rod (26), the inner wall of the valve body (2) is movably connected with a valve cover (4), the upper end and the lower end of the valve cover (4) are both fixedly connected with connecting pieces (40), one side, far away from the valve body (2), of the valve cover (4) is movably connected with a buffer piece (42), and one side, close to the valve body (2), of the valve cover (4) is fixedly connected with a round convex piece (41);

the top of the connecting piece (40) located valve gap (4) top is pegged graft with the bottom of valve rod (26), is located the bottom of the connecting piece (40) of valve gap (4) bottom is pegged graft and is had locating lever (27), the top outer wall of locating lever (27) and the inner wall swing joint of second connecting pipe (23), the bottom outer wall of locating lever (27) has cup jointed leak protection piece (232), the inner wall of locating lever (27) is pegged graft and has dredge pole (31), the even swing joint of outer wall of dredge pole (31) has doctor-bar (311), the bottom fixedly connected with telescopic link (30) of dredge pole (31), the bottom fixedly connected with mediation motor (3) of telescopic link (30).

2. The anti-clogging mud ball valve for the shield tunneling machine according to claim 1, characterized in that: one side of valve body (2) is provided with delivery port (22), just the opposite side of valve body (2) is provided with water inlet (21), the equal joint of inner wall of delivery port (22), water inlet (21) has sealing washer (20).

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

4. The anti-clogging mud ball valve for the shield tunneling machine according to claim 1, characterized in that: first rubber ring (261) has evenly been cup jointed at the top of valve rod (26), 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), the bottom inner wall of compressing tightly piece (262) and the top inner wall swing joint of first connecting pipe (25), the top that compresses tightly piece (262) and the top upper surface of first connecting pipe (25) pass through bolt fixed connection.

5. The anti-clogging mud ball valve for the shield tunneling machine according to claim 1, characterized in that: the outer wall of the leakage-proof piece (232) is sleeved with the inner wall of the bottom of the second connecting pipe (23), the bottom of the leakage-proof piece (232) is fixedly connected with a bottom cover (231), the lower surface of the positioning rod (27) is fixedly connected with the upper surface of the bottom cover (231), the outer wall of the bottom of the dredging rod (31) is connected with the inner wall of the bottom cover (231) in an inserting mode, 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.

6. The anti-clogging mud ball valve for the shield tunneling machine according to claim 1, characterized in that: the top of the dredging rod (31) is fixedly connected with a top piece (312), the outer wall of the top piece (312) is sleeved with a leakage-proof ring sleeve (313), and the outer walls of the top piece (312) and the leakage-proof ring sleeve (313) are movably connected with the inner wall of the positioning rod (27).

7. The anti-clogging mud ball valve for the shield tunneling machine according to claim 1, characterized in that: valve gap (4) keep away from one side symmetry of valve body (2) and are provided with shell fragment (45), just the inner wall that valve body (2) were kept away from in valve gap (4) has evenly seted up and has disturbed chute (43), the one end fixedly connected with bolster (42) of valve body (2) are kept away from in shell fragment (45), second rubber ring (44) have been cup jointed to the outer wall of round protruding piece (41).