CN112431246B

CN112431246B - River channel dredging device

Info

Publication number: CN112431246B
Application number: CN202011262433.6A
Authority: CN
Inventors: 唐敏
Original assignee: Haixin Construction Development Group Co ltd
Current assignee: Haixin Construction Development Group Co.,Ltd.
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2022-02-15
Anticipated expiration: 2040-11-12
Also published as: CN112431246A

Abstract

The invention discloses a river channel dredging device, which relates to the technical field of dredging equipment and comprises a dredging pipe, wherein one end of the dredging pipe is communicated with a storage box, one side of the storage box, which is far away from the dredging pipe, is communicated with a sewage discharge pipe, a rotary rod is uniformly arranged in the dredging pipe, the outer side of the rotary rod is fixedly connected with a spiral plate, the outer side of the spiral plate is in sliding connection with the inner wall of the dredging pipe, the position, close to the rotary rod, of the inner wall of the dredging pipe is connected with a conical frame through a connecting rod, and the inner wall of the conical frame is fixedly connected with a spiral motor. This river course desilting device can enlarge the application range of device, uses in the lower region of silt water content, improves the ability that the device adapted to the complex environment, can utilize the interact between the silt to carry out the breakage to the higher silt of hardness, avoids silt to block up equipment, has improved the reliability of device, can carry out moist softening to silt, reduces the processing degree of difficulty of silt, improves the treatment effeciency of silt.

Description

River channel dredging device

Technical Field

The invention relates to the technical field of dredging equipment, in particular to a river channel dredging device.

Background

The river or lake needs to regularly clear up its bottom silt, if not clear up in time, can cause inconvenience to resident's life, and the main reason that the silt produced is that rainwater contains a part micronic dust and other solid particle, and traditional clearance method has: manual digging, dredging by a silt grab bucket vehicle, a dredging pump, a traditional dredging boat and the like are carried out by using a manual tool, but the manual digging has high labor intensity, poor working condition and low safety; silt grab bucket car trouble is many, and adaptability is poor, and it can only handle great stone and debris in the aquatic moreover, hardly handles to silt that tiny solids such as dust formed: the adaptability of the desilting pump is worse, and the pump body is easily damaged by larger stones in water: the traditional dredging ship has lower working efficiency and automation efficiency, and is inconvenient to work and move particularly when the dredging water surface is larger.

The invention CN109469139A discloses a dredging boat, which comprises a boat body, a cab arranged on the boat body, a positioning pile arranged at the rear part of the boat body, a suspension bracket arranged at the front end of the boat body, a mud suction device arranged in front of the boat body, a mud bin arranged in the middle of the boat body, a guide rail arranged above the mud bin, a movable support and a push-pull vehicle arranged on the guide rail, the push-pull vehicle and the movable support are connected through a connecting rod, the movable support is connected with the mud suction device, the movable support can pull the mud suction device out of water under the pulling of the push-pull vehicle, and the suspension bracket is used for fixing the mud suction device after the mud suction device is pulled out of water, so that the mud suction device can have a multi-angle adjustment function, and can realize a larger-range dredging work without moving the boat body.

But inhale mud device and only can use in the more region of silt water content, the scope of use is less, can't adapt to complicated operational environment, can not utilize the interact between the silt to carry out the breakage to silt, blocks up equipment easily when silt hardness is higher, and the reliability of device is relatively poor, can not carry out moist softening to silt, reduces the processing degree of difficulty of silt, and the efficiency that silt was handled is lower, can't be according to the moist silt of different situation automatic adjustment drainage function, and intelligent degree is lower.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the river channel dredging device, which can enlarge the application range of the device, is used in an area with lower water content of sludge, improves the capability of the device to adapt to a complex environment, can crush the sludge with higher hardness by utilizing the interaction between the sludge, avoids the sludge from blocking equipment, improves the reliability of the device, can moisten and soften the sludge, reduces the treatment difficulty of the sludge, improves the treatment efficiency of the sludge, can automatically adjust the drainage function to moisten the sludge according to different conditions, and has higher intelligent degree.

In order to achieve the purpose, the invention is realized by the following technical scheme: a river dredging device comprises a dredging pipe, wherein one end of the dredging pipe is communicated with a storage box, one side of the storage box, which is far away from the dredging pipe, is communicated with a blow-off pipe, a rotary rod is uniformly arranged in the dredging pipe, a spiral plate is fixedly connected to the outer side of the rotary rod, the outer side of the spiral plate is in sliding connection with the inner wall of the dredging pipe, the position, which is close to the rotary rod, of the inner wall of the dredging pipe is connected with a conical frame through a connecting rod, a spiral motor is fixedly connected to the inner wall of the conical frame, the output end of the spiral motor penetrates through the conical frame and is connected with the rotary rod, one end of the bottom of the dredging pipe is placed into the bottom of a river to be contacted with sludge, the rotary rod and the spiral plate are driven to rotate after the spiral motor is started, the spiral plate is drilled into the sludge to drive the sludge to enter the dredging pipe along the spiral plate, and the sludge inside of the dredging pipe continues to be driven by the spiral plate to gradually enter the storage box, then the sludge can be transported by thrust because the sludge is discharged to a designated position along the inclined sewage discharge pipe under the action of gravity, the water content of the sludge is not required, the sludge with less moisture can also be transported by pushing, the application range of the dredging equipment is expanded, the capability of the device for adapting to complex environment is improved, the outer side of the conical frame is symmetrically provided with stirring knives which are connected with the conical frame in a sliding way, the end of the stirring knife, which is far away from the conical frame, is fixedly connected with a mounting ring, the mounting ring is sleeved outside the rotary rod, the rotary rod and the mounting ring are driven to rotate simultaneously after the spiral motor is started, the mounting ring drives the stirring knife to rotate along the conical frame, impurity and hard piece in the silt can be cut up to the inside pivoted stirring sword of desilting, have improved the device to the crushing cleaning ability of silt and inside impurity, make things convenient for the clearance and the utilization of silt, the internally mounted of desilting pipe has breaker.

Preferably, the dredging pipe comprises a bottom pipe and an upper pipe, and the bottom pipe and the upper pipe are communicated through a semicircular pipe.

Preferably, the crushing device comprises an arc plate, the arc plate is arranged at the bottom of the inner side of the upper pipe, the bottom of the upper pipe is uniformly provided with crushing holes, a conveying pipe is arranged at a position, close to the crushing holes, of the bottom of the upper pipe, the inner diameter of the conveying pipe is gradually reduced from top to bottom, one end of the bottom of the conveying pipe penetrates through the bottom pipe, one end, extending to the inside of the upper pipe, of the conveying pipe is communicated with a funnel through a connecting pipe, sludge moved along the dredging pipe under the driving of a spiral plate changes the movement direction along the arc plate, the sludge at the top of the arc plate continuously moves and then falls into the funnel and the connecting pipe, and due to the gravity action of the sludge, the sludge is extruded through the conveying pipe and then enters into the inside of the bottom pipe, the sludge entering into the inside of the bottom pipe and the sludge entering from the outside of the dredging pipe are crushed due to different mutual collision of the movement directions, and the sludge with each other interaction between the sludge can be used for crushing the sludge with the larger hardness, the sludge is prevented from blocking the equipment, and the reliability of the device is improved.

Preferably, the spiral plate is evenly installed in the outside of connecting pipe, the wash port has evenly been seted up in the outside of funnel, promote because inertia promotes the spiral plate rotation along the silt that desilting pipe removed by the spiral plate, the spiral plate drives connecting pipe and funnel rotation, the moisture that contains in rotatory connecting pipe and the silt of funnel in with inside is thrown away, the silt hardening back that has reduced water content gets into the intraductal silt interact with inside original of bottom through the conveyer pipe, can increase the hardness of carrying out broken silt, better realization is broken and is got into the purpose of the inside silt of pipeline.

Preferably, one end of the output end of the spiral motor, which extends to the outside of the conical frame, is connected with a telescopic pipe, and one end of the telescopic pipe, which is far away from the spiral motor, is connected with the rotating rod.

Preferably, the stirring sword includes half sword on a left side and half sword on the right side, rotate between half sword on a left side and the right half sword and connect, the embedded groove has all been seted up to the both sides of half sword on the right side, the butt joint perforation with half sword looks adaptation on a left side is seted up to one side of half sword on a left side.

Preferably, an elastic strip is fixedly connected to one side of the right half cutter, the elastic strip extends to the inside of the butt joint perforation and is fixedly connected with the left half cutter, when the hardness of sludge is higher, the stirring cutters are moved and extruded along the inner wall of the dredging pipe, harder sludge is not easy to disperse and pass through the stirring cutters, the force for extruding the stirring cutters is increased along with the movement of the sludge, the stirring cutters are extruded and bent by the sludge, the right half cutter rotates to enter the inside of the left half cutter from the butt joint perforation, the horizontal distance between the bent stirring cutters is shortened, the telescopic pipe is driven to be shortened, the connecting rod, the conical frame and the internal spiral motor move towards the direction of the rotating rod, the conical frame collides with the harder sludge to crush the sludge, the elastic strip after passing through the stirring cutters pushes the right half cutter to rotate to the initial position due to the elasticity of the elastic strip, the elastic strip can automatically trigger the collision with the harder sludge to realize the crushing when the hardness of the sludge is higher, the damage caused by continuous extrusion of the sludge with higher hardness is avoided, and the service life of the device is prolonged.

Preferably, a water feeding channel is formed in the left half cutter, the water feeding channel penetrates through the left half cutter, the conical frame, the connecting rod and the dredging pipe, a sealing plug is fixedly connected to one side of the inner wall of the water feeding channel through a control spring, and the sealing plug extends to the inside of the butt-joint through hole.

Preferably, a water feeding groove is formed in the right half cutter, water leaking grooves are formed in two sides of the right half cutter, the water leaking grooves are communicated with the water feeding grooves, water is fed into the water feeding channel from one end, penetrating through the water feeding channel, of the outer portion of the dredging pipe, harder sludge enters the dredging pipe to extrude the stirring cutter to cause the stirring cutter to rotate and bend, the right half cutter enters the left half cutter from the butt joint through hole after rotating, the right half cutter extrudes and slides to extrude the sealing strip along the butt joint through hole, the sealing strip is pushed to extrude the control spring to enter the water feeding channel, water in the water feeding channel flows into the butt joint through hole after being blocked by the sealing strip, flows to the outer portion of the stirring cutter from the water leaking groove at the other end after entering the water feeding channel from the water leaking groove, sludge outside the stirring cutter continues to be driven by the spiral plate to move along the dredging pipe after being wetted and softened, and capable of wetting the sludge, the silt treatment degree of difficulty is reduced, the silt treatment efficiency is improved, the silt can be moistened according to the automatic adjustment drainage function of different conditions, and the intelligent degree is higher.

The invention provides a river channel dredging device. The method has the following beneficial effects:

(1) this river course desilting device can utilize thrust transportation silt, need not require the water content of silt, and the less silt of moisture also can be promoted the transportation, has enlarged the application range of desilting equipment, improves the ability that the device adapts to complex environment.

(2) This river course desilting device can utilize the interact between the silt to carry out the breakage to the great silt of hardness, avoids silt to block up equipment, has improved the reliability of device.

(3) This river course dredging device can increase the hardness of carrying out broken silt, and the broken purpose that gets into the inside silt of pipeline of better realization.

(4) This river course dredging device has improved the device and has made things convenient for the clearance and the utilization of silt to the crushing cleaning capacity of silt and inside impurity.

(5) This river course desilting device can realize the breakage at automatic triggering striking silt when silt hardness is higher, avoids the higher silt of hardness to last the extrusion equipment to cause the damage, has improved the life of device.

(6) This river course desilting device can carry out moist softening to silt, reduces the processing degree of difficulty of silt, improves the treatment effeciency of silt.

(7) This river course desilting device can be according to the moist silt of different situation automatic adjustment drainage function, and intelligent degree is higher.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the desilting tube structure of the present invention;

FIG. 3 is a schematic view showing the inner structure of the desilting pipe according to the present invention;

FIG. 4 is a schematic view of the crushing apparatus according to the present invention;

FIG. 5 is a schematic view of a stirring blade according to the present invention;

FIG. 6 is a schematic view of the internal structure of the stirring blade of the present invention.

In the figure: 1-dredging pipe, 101-bottom pipe, 102-upper pipe, 103-semicircular pipe, 2-storage tank, 3-blow-off pipe, 4-rotating rod, 5-spiral plate, 6-connecting rod, 7-conical frame, 8-spiral motor, 9-stirring knife, 901-left half knife, 902-right half knife, 903-embedded groove, 904-butt perforation, 905-elastic strip, 10-mounting ring, 11-crushing device, 111-arc plate, 112-crushing hole, 113-conveying pipe, 114-connecting pipe, 115-funnel, 12-spiral plate, 13-water discharging hole, 14-telescopic pipe, 15-water conveying channel, 16-control spring, 17-sealing plug, 18-water conveying groove and 19-water leaking groove.

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.

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

Example one

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a river course sediment removal device, including desilting pipe 1, the one end intercommunication of desilting pipe 1 has bin 2, bin 2 keeps away from one side intercommunication of desilting pipe 1 has blow off pipe 3, rotary rod 4 is evenly installed to the inside of desilting pipe 1, the outside fixedly connected with spiral plate 5 of rotary rod 4, the outside of spiral plate 5 and desilting pipe 1's inner wall sliding connection, the position that the inner wall of desilting pipe 1 is close to rotary rod 4 is connected with circular cone frame 7 through connecting rod 6, circular cone frame 7's inner wall fixedly connected with screw motor 8, screw motor 8's output runs through circular cone frame 7 and is connected with rotary rod 4, stirring sword 9 is installed to circular cone frame 7's outside symmetry, stirring sword 9 and circular cone frame 7 sliding connection, the one end fixedly connected with collar 10 of circular cone frame 7 is kept away from to stirring sword 9, collar 10 covers the outside at rotary rod 4.

During the use, the bottom and the silt contact of river are put into to the bottom one end of dredging pipe 1, it rotates to start driving rotary rod 4 and spiral plate 5 behind the screw motor 8, spiral plate 5 bores into inside the silt, it gets into inside dredging pipe 1 along spiral plate 5 to drive silt, the inside silt of dredging pipe 1 continues to be driven by inside pivoted spiral plate 5 and gets into bin 2 gradually, then because the effect of gravity discharges the assigned position along the blow off pipe 3 of slope, can utilize thrust transportation silt, need not require the water content of silt, the less silt of moisture also can be promoted the transportation, the application range of dredging equipment has been enlarged, improve the ability that the device adapts to the complex environment.

The 8 back that start-up of helical motor drives rotary rod 4 and collar 10 and rotates simultaneously, and collar 10 drives stirring sword 9 and rotates along circular cone frame 7, can cut up impurity and hard piece in silt at the inside pivoted stirring sword 9 of desilting pipe 1, has improved the device to the crushing clearance ability of silt and inside impurity, makes things convenient for the clearance and the utilization of silt.

Example two

Referring to fig. 1-4, the present invention provides a technical solution: on the basis of the first embodiment, the crushing device 11 is installed inside the dredging pipe 1, the dredging pipe 1 comprises a bottom pipe 101 and an upper pipe 102, and the bottom pipe 101 is communicated with the upper pipe 102 through a semicircular pipe 103.

Crushing device 11 includes circular arc board 111, and circular arc board 111 is installed in the interior survey bottom of upper portion pipe 102, and broken hole 112 has evenly been seted up to the bottom of upper portion pipe 102, and conveyer pipe 113 is installed to the position that the bottom of upper portion pipe 102 is close to broken hole 112, and conveyer pipe 113's internal diameter from the top down reduces gradually, and bottom pipe 101 is run through to conveyer pipe 113's bottom one end, and conveyer pipe 113 extends to the inside one end of upper portion pipe 102 and has funnel 115 through connecting pipe 114 intercommunication.

The spiral plate 12 is uniformly installed on the outer side of the connecting pipe 114, and the drain holes 13 are uniformly opened on the outer side of the funnel 115.

During the use, the silt that is driven along desilting pipe 1 and removes by spiral plate 5 changes the direction of motion along circular arc board 111, the silt at circular arc board 111 top continues to move the back inside funnel 115 and connecting pipe 114 drop, because the action of gravity of silt itself, silt is pushed and gets into bottom pipe 101 behind conveyer pipe 113 inside, the inside silt of getting into bottom pipe 101 and the silt that gets into from desilting pipe 1 outside are because the different collisions of direction of motion are broken, can utilize the interact between the silt to carry out the breakage to the great silt of hardness, avoid silt to block up equipment, the reliability of device has been improved.

The silt that is promoted to remove along dredging pipe 1 by spiral plate 5 is because inertia promotes spiral plate 12 and rotates, spiral plate 12 drives connecting pipe 114 and funnel 115 and rotates, the moisture that contains in rotatory connecting pipe 114 and the funnel 115 silt with inside is thrown away, the silt sclerosis back that has reduced the water content gets into bottom pipe 101 interior silt interact with inside original through conveyer pipe 113, can increase the hardness of carrying out broken silt, better realization breakage gets into the purpose of the inside silt of pipeline.

EXAMPLE III

Referring to fig. 1-6, the present invention provides a technical solution: on the basis of the first embodiment, one end of the output end of the spiral motor 8, which extends to the outside of the conical frame 7, is connected with a telescopic pipe 14, and one end of the telescopic pipe 14, which is far away from the spiral motor 8, is connected with the rotating rod 4.

The stirring knife 9 comprises a left half knife 901 and a right half knife 902, the left half knife 901 and the right half knife 902 are rotatably connected, embedded grooves 903 are formed in two sides of the right half knife 902, and a butt-joint through hole 904 matched with the right half knife 902 is formed in one side of the left half knife 901.

An elastic strip 905 is fixedly connected to one side of the right half blade 902, and the elastic strip 905 extends into the butt perforation 904 and is fixedly connected with the left half blade 901.

A water feeding channel 15 is formed in the left half cutter 901, the water feeding channel 15 penetrates through the left half cutter 901, the conical frame 7, the connecting rod 6 and the dredging pipe 1, a sealing plug 17 is fixedly connected to one side of the inner wall of the water feeding channel 15 through a control spring 16, and the sealing plug 17 extends to the inside of the butt-joint through hole 904.

The water feeding groove 18 is formed in the right half cutter 902, the water leaking grooves 19 are formed in the two sides of the right half cutter 902, and the water leaking grooves 19 are communicated with the water feeding groove 18.

When the sludge dredging pipe is used, when the hardness of sludge is higher, the stirring knives 9 are moved along the inner wall of the dredging pipe 1 to extrude, harder sludge is not easy to disperse and penetrate through the stirring knives 9, the force for extruding the stirring knives 9 along with the movement of the sludge is increased, the right half knife 903 rotates to enter the left half knife 901 from the butt joint through hole 904 after the stirring knives 9 are extruded and bent by the sludge, the horizontal distance between the bent stirring knives 9 is shortened, the telescopic pipe 14 is driven to be shortened, the connecting rod 6 is driven, conical frame 7 and inside helical electric motor 8 move to the direction of rotary rod 4 and are close to, and conical frame 7 collides the garrulous silt with harder silt after, and the higher silt of hardness is through stirring sword 9 back elastic strip 905 because the elasticity of self promotes right half sword 902 and rotates to initial position, can be when silt hardness is higher automatic triggering striking silt realizes the breakage, avoids the higher silt of hardness to continue to extrude equipment and causes the damage, has improved the life of device.

The water is sent to the inside of the water sending channel 15 from one end of the water sending channel 15 penetrating to the outside of the dredging pipe 1, harder sludge enters the inside of the dredging pipe 1 to press the stirring knife 9 to cause the stirring knife 9 to rotate and bend, the right half knife 902 enters the inside of the left half knife 901 from the butt joint perforation 904 after rotating, the right half knife 902 presses and slides to press the sealing strip 17 along the butt joint perforation 904, the sealing strip 17 is pushed to press the control spring 16 to enter the inside of the water sending channel 15, the water in the water sending channel 15 flows into the butt joint perforation 904 without being blocked by the sealing strip 17, the water enters the water sending channel 18 from the water leakage channel 19 and flows to the outside of the stirring knife 9 from the water leakage channel 19 at the other end, the sludge outside of the stirring knife 9 is wetted and softened and then continuously driven by the spiral plate 5 to move along the dredging pipe 1, so that the sludge can be wetted and softened, the sludge treatment difficulty is reduced, and the sludge treatment efficiency is improved, simultaneously can be according to the moist silt of different situation automatic adjustment drainage function, intelligent degree is higher.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a river course dredging device, includes desilting pipe (1), its characterized in that: the one end intercommunication of desilting pipe (1) has bin (2), one side intercommunication that desilting pipe (1) was kept away from in bin (2) has blow off pipe (3), rotary rod (4) are evenly installed to the inside of desilting pipe (1), the outside fixedly connected with spiral plate (5) of rotary rod (4), the outside of spiral plate (5) and the inner wall sliding connection of desilting pipe (1), the position that the inner wall of desilting pipe (1) is close to rotary rod (4) is connected with circular cone frame (7) through connecting rod (6), the inner wall fixedly connected with screw motor (8) of circular cone frame (7), the output of screw motor (8) runs through circular cone frame (7) and is connected with rotary rod (4), stirring sword (9) are installed to the outside symmetry of circular cone frame (7), stirring sword (9) and circular cone frame (7) sliding connection, one end of the stirring knife (9) far away from the conical frame (7) is fixedly connected with a mounting ring (10), the mounting ring (10) is sleeved outside the rotating rod (4), and a crushing device (11) is arranged inside the dredging pipe (1);

the dredging pipe (1) comprises a bottom pipe (101) and an upper pipe (102), and the bottom pipe (101) is communicated with the upper pipe (102) through a semicircular pipe (103);

the crushing device (11) comprises an arc plate (111), the arc plate (111) is installed at the inner bottom of an upper pipe (102), crushing holes (112) are uniformly formed in the bottom of the upper pipe (102), a conveying pipe (113) is installed at the position, close to the crushing holes (112), of the bottom of the upper pipe (102), the inner diameter of the conveying pipe (113) is gradually reduced from top to bottom, one end of the bottom of the conveying pipe (113) penetrates through a bottom pipe (101), and one end, extending into the upper pipe (102), of the conveying pipe (113) is communicated with a funnel (115) through a connecting pipe (114);

the spiral plate (12) is uniformly arranged on the outer side of the connecting pipe (114), and the water discharging holes (13) are uniformly formed in the outer side of the funnel (115).

2. The river channel dredging device according to claim 1, wherein: the output end of the spiral motor (8) extends to one end outside the conical frame (7) and is connected with a telescopic pipe (14), and one end, far away from the spiral motor (8), of the telescopic pipe (14) is connected with the rotating rod (4).

3. The river channel dredging device according to claim 1, wherein: the stirring knife (9) comprises a left half knife (901) and a right half knife (902), the left half knife (901) and the right half knife (902) are connected in a rotating mode, embedded grooves (903) are formed in the two sides of the right half knife (902), and butt-joint through holes (904) matched with the right half knife (902) are formed in one side of the left half knife (901).

4. A river channel dredging device according to claim 3, wherein: one side of the right half knife (902) is fixedly connected with an elastic strip (905), and the elastic strip (905) extends to the inside of the butt joint perforation (904) and is fixedly connected with the left half knife (901).

5. A river channel dredging device according to claim 3, wherein: a water feeding channel (15) is formed in the left half cutter (901), the water feeding channel (15) penetrates through the left half cutter (901), the conical frame (7), the connecting rod (6) and the dredging pipe (1), a sealing plug (17) is fixedly connected to one side of the inner wall of the water feeding channel (15) through a control spring (16), and the sealing plug (17) extends to the inside of the butt-joint perforation (904).

6. The river channel dredging device according to claim 5, wherein: the water feeding groove (18) is formed in the right half cutter (902), water leakage grooves (19) are formed in the two sides of the right half cutter (902), and the water leakage grooves (19) are communicated with the water feeding groove (18).