阅读说明：本技术 一种在潜孔式拦污栅栅顶上部以水工导槽为导向轨道的清污抓斗 (Dirt cleaning grab bucket taking hydraulic guide groove as guide track on upper part of grid top of down-the-hole type dirt blocking grid ) 是由 侯鹏 乔荣军 王奋追 于 2020-03-26 设计创作，主要内容包括：本发明公开了一种在潜孔式拦污栅栅顶上部以拦污栅水工导槽为导向轨道的清污抓斗,主要由斗架1、斗爪6和5、斗爪开闭机构3、栅顶上部导向装置4以及抓斗导向装置2所组成。和现有技术不同的是,清污抓斗的栅顶上部导向装置4是在潜孔式拦污栅栅顶上部以拦污栅水工导槽为导向轨道。该清污抓斗不需要在潜孔拦污栅栅顶上部设置清污抓斗导向拦污栅或者抓斗导向轨道,利用潜孔式拦污栅栅顶上部的拦污栅水工导槽作为清污抓斗在拦污栅栅顶上部的导向轨道,解决清污抓斗在潜孔式拦污栅上部无导向轨道,清污抓斗因受水流冲击,清污抓斗无法在拦污栅栅顶位置与拦污栅确定相对位置关系的问题,以节约工程投资。(The invention discloses a trash cleaning grab bucket taking a trash rack hydraulic guide groove as a guide rail at the upper part of a down-the-hole type trash rack top, which mainly comprises a bucket frame 1, bucket claws 6 and 5, a bucket claw opening and closing mechanism 3, a grid top guide device 4 and a grab bucket guide device 2. Different from the prior art, the upper guide device 4 of the grid top of the trash cleaning grab bucket takes the hydraulic guide groove of the trash rack as a guide rail on the upper part of the grid top of the down-the-hole trash rack. The trash cleaning grab bucket does not need to be provided with a trash cleaning grab bucket guide trash rack or a grab bucket guide rail on the upper portion of the top of the down-the-hole trash rack, and the trash rack hydraulic guide groove on the upper portion of the top of the down-the-hole trash rack is used as the guide rail of the trash cleaning grab bucket on the upper portion of the top of the trash rack, so that the problem that the trash cleaning grab bucket does not have the guide rail on the upper portion of the down-the-hole trash rack, and cannot determine the relative position relation between the trash rack and the trash rack due to the fact that the trash cleaning grab bucket is impacted by water flow is solved, and engineering investment is saved.)

1. The utility model provides a use hydraulic guide groove as orbital grab bucket of decontaminating of direction on down-the-hole trash rack bars top upper portion, mainly comprises bucket rack, claw switching mechanism and grab guider, its characterized in that: the upper guide device of the grid top can move from the grid top position of the downhole trash rack to the upstream side of the trash rack without influencing the descending and dirt cleaning position of the trash grab bucket along the surface of the trash rack or be separated from the trash grab bucket.

2. The grab bucket for cleaning dirt on top of downhole trash rack as claimed in claim 1, wherein the guiding device is a guide rail for the trash rack of downhole trash rack.

3. The grab bucket for cleaning dirt on the top of a down-the-hole trash rack as claimed in claim 1, wherein the guide means on the top of the down-the-hole trash rack is the guide rail of the hydraulic guide groove of the down-the-hole trash rack.

4. The grab bucket for cleaning dirt on the top of a down-the-hole trash rack in claim 1 features that the guide unit on the top of the grid is a roller rolling along the hydraulic guide channel of the down-the-hole trash rack.

5. The grab bucket for cleaning dirt on the top of a down-the-hole trash rack of claim 1, wherein the guide means on the top of the down-the-hole trash rack is a slide block sliding along the hydraulic guide groove of the down-the-hole trash rack.

6. The cleaning grab bucket with hydraulic guide channel as guide track in the top of the down-the-hole trash rack as claimed in claim 1, wherein the hydraulic driving mechanism is used as the hydraulic driving mechanism for the operation executing mechanism to shift the position of the guide device in the top of the down-the-hole trash rack from the top position to the upstream side of the trash rack without affecting the descending and cleaning position of the cleaning grab bucket along the surface of the trash rack.

7. The cleaning grab bucket with hydraulic guide channel as guide track in the top of the down-the-hole trash rack as claimed in claim 1, wherein the actuating mechanism for moving the guide unit from the top position to the upstream side of the trash rack is an electric driving mechanism.

8. The trash-cleaning grab bucket with the hydraulic guide groove as the guide rail on the upper part of the top of the down-the-hole trash rack according to claim 1, wherein the actuator for separating the guide device on the top of the grid from the trash-cleaning grab bucket is a hydraulic driving mechanism.

9. The trash-cleaning grab bucket with the hydraulic guide groove as the guide rail on the upper part of the top of the down-the-hole trash rack according to claim 1, wherein the actuator for separating the guide device on the top of the grid from the trash-cleaning grab bucket is an electric driving mechanism.

10. The trash cleaning grab bucket with the hydraulic guide groove as the guide rail on the upper part of the top of the down-the-hole trash rack according to claim 1, characterized in that the bucket claw opening and closing mechanism is a hydraulically driven opening and closing mechanism.

11. The trash cleaning grab bucket with the hydraulic guide groove as the guide rail on the upper part of the top of the down-the-hole trash rack according to claim 1, characterized in that the bucket claw opening and closing mechanism is a mechanically driven opening and closing mechanism.

Technical Field

The invention belongs to a dirt cleaning device for cleaning dirt on a down-the-hole type trash rack by a water inlet of a hydraulic turbine of a hydropower station or a water inlet of a pump station, and also belongs to a dirt cleaning device matched with a dirt cleaner or other mechanical equipment.

Background

In order to ensure smooth water flow of the trash rack, the trash rack is generally arranged in front of a water inlet of a hydraulic turbine of a hydropower station or a water inlet of a pump station, dirt attached to the front of the trash rack and the surface of the trash rack needs to be removed, the trash rack is prevented from being blocked by the dirt, head loss is caused, and the safety of the trash rack is endangered in serious cases. Some trash rack arrangement types are down-the-hole trash racks (in hydraulic engineering, the trash rack arrangement types without exposed dam surfaces on the tops of the trash racks are all called down-the-hole trash racks), the hydraulic power station or the pump station of a trash cleaning grab bucket guide rail is not arranged on the upper portions of the tops of the trash racks, the trash racks are arranged in deep water, the water velocity of the tops of the trash racks is high and the trash racks are in a turbulent flow state, when the trash cleaning grab bucket performs descending trash cleaning operation, the trash cleaning grab bucket swings back and forth or rotates left and right along with water flow under the impact of water flow, so that the trash cleaning grab bucket cannot perform trash cleaning operation when descending to the tops of the trash racks, the trash cleaning grab bucket and the trash racks do not have a determined relative position relation, bucket teeth of the trash cleaning grab bucket interfere with the trash racks, and even the trash cleaning scheme is abandoned, and a diver is used for manual trash cleaning, and manual decontamination requires the unit to stop generating electricity, which causes great economic loss.

In the prior art, in order to solve the problem that no guide rail of the trash-cleaning grab bucket is arranged on the upper part of the top of the down-the-hole trash rack, the complicated trash-cleaning grab bucket guide trash rack or the trash-cleaning grab bucket guide rail needs to be arranged on the upper part of the top of the down-the-hole trash rack. The power station is generally provided with the porous trash rack at the water inlet, and the down-the-hole trash rack is arranged in deep water, so the engineering quantity of the trash removal grab bucket guide trash rack or the trash removal grab bucket guide rail which needs to be added is larger, the lifting tonnage of the original lifting equipment for lifting the trash rack can be increased or the lifting mode is changed along with the increase of the dead weight of the trash rack, the problem that the trash removal grab bucket does not have guide rail support on the upper portion of the down-the-hole trash rack is solved by adding the trash removal grab bucket guide trash rack or the trash removal grab bucket guide rail on the upper portion of the down-the-hole trash rack, great engineering investment is needed, and huge workload and economic burden are brought to later operation and overhaul of the power station due to the fact that a large amount of trash removal grab bucket guide trash rack or trash removal grab bucket guide rail is added.

Disclosure of Invention

Based on the problems in the prior art, the invention aims to design the sewage disposal grab bucket which takes the hydraulic guide groove as the guide rail at the upper part of the top of the down-the-hole type sewage barrier, the sewage disposal grab bucket does not need to be provided with the sewage disposal grab bucket guide sewage barrier or the sewage disposal grab bucket guide rail at the upper part of the top of the down-the-hole type sewage barrier, and the problem that the sewage disposal grab bucket does not have the guide rail at the upper part of the top of the down-the-hole type sewage barrier due to the hydraulic guide groove of the down-the-hole type sewage barrier is impacted by water flow, and the sewage disposal grab bucket cannot determine the relative position relation between the top of the down-the-down-the-hole type sewage barrier and the sewage barrier is solved, so as to save the engineering investment.

The purpose of the invention is realized by the following technical scheme: a dirt-removing grab bucket with hydraulic guide slot as guide track at the top of down-the-hole dirt barrier is composed of bucket frame, bucket claws, opening-closing mechanism for bucket claws and guide unit for grab bucket. The bucket claw, the bucket claw opening and closing mechanism and the grab bucket guide device. The method is characterized in that: the trash cleaning grab bucket is provided with a grid top upper part guiding device which takes a down-the-hole trash rack hydraulic guide groove as a guide rail. When the cleaning grab bucket descends to the top of the down-the-hole type trash rack, the position of the guide device on the upper part of the grid top can be moved to the upstream side of the trash rack from the top of the down-the-hole type trash rack without influencing the descending cleaning position of the cleaning grab bucket along the surface of the trash rack or be separated from the cleaning grab bucket.

The invention relates to a trash cleaning grab bucket which takes a hydraulic guide groove as a guide rail at the upper part of the top of a down-the-hole trash rack. The upper guide device of the grid top of the grab bucket uses the down-the-hole trash rack guide rail as a guide rail to limit the front and back and left and right positions of the trash cleaning grab bucket, so that the trash cleaning grab bucket cannot swing back and forth or rotate left and right due to water flow impact in the descending process, and the trash cleaning grab bucket descends under the action of the upper guide device of the grid top and descends to the top of the trash rack along the down-the-hole trash rack guide rail. Due to the function of the down-the-hole type trash rack guide rail, the trash cleaning grab bucket has a determined relative position relation between the trash rack top position and the trash rack under the function of the guide device on the upper portion of the rack top, so that the problems that the trash cleaning grab bucket is impacted by water flow on the upper portion of the down-the-hole type trash rack top position, the trash cleaning grab bucket descends to the down-the-hole type trash rack top position and cannot determine the relative position relation with the trash rack are well solved, and bucket teeth of the trash cleaning grab bucket cannot interfere with the trash rack.

The invention relates to a trash cleaning grab bucket which takes a hydraulic guide groove as a guide rail at the upper part of the top of a down-the-hole trash rack. The upper guide device of the grid top of the grab bucket uses the inner wall and the side wall of the down-the-hole type trash rack groove as guide surfaces to limit the front and back and left and right positions of the trash rack, so that the trash rack cannot swing back and forth or rotate left and right due to water flow impact in the descending process, and the trash rack can descend under the action of the upper guide device of the grid top and descend to the trash rack top along the down-the-hole type trash rack groove. Due to the action of the down-the-hole type trash rack groove, the trash cleaning grab bucket has a determined relative position relation between the trash rack and the trash rack at the position of the top of the down-the-hole type trash rack under the action of the guide device at the upper part of the rack top, so that the problems that the trash cleaning grab bucket is impacted by water flow at the upper part of the top of the down-the-hole type trash rack, the trash cleaning grab bucket is lowered to the position of the top of the down-the-hole type trash rack and cannot determine the relative position relation with the trash rack are well solved, and bucket teeth of the trash cleaning grab bucket cannot interfere with the trash rack.

The invention relates to a trash cleaning grab bucket which takes a hydraulic guide groove as a guide rail at the upper part of the top of a down-the-hole trash rack. The roller takes the downhole trash rack hydraulic guide groove as a guide rail, and limits the front and back and left and right positions of the grab bucket by using the downhole trash rack hydraulic guide groove, so that the trash cleaning grab bucket cannot swing back and forth or rotate left and right due to water flow impact in the descending process, and can descend under the action of the guide device on the upper part of the grid top and descend to the position of the trash rack top along the downhole trash rack hydraulic guide groove.

The invention relates to a trash cleaning grab bucket which takes a hydraulic guide groove as a guide rail at the upper part of a down-the-hole trash rack top.

The invention relates to a trash cleaning grab bucket which takes a hydraulic guide groove as a guide rail at the upper part of the top of a down-the-hole trash rack, and is characterized in that the top position of the hole type trash rack of a guide device at the upper part of the top of the grid is moved to the upstream side of the trash rack, and an action executing mechanism which does not influence the descending and trash cleaning position of the trash cleaning grab bucket along the surface of the trash rack is a hydraulic driving mechanism. The hydraulic driving mechanism mainly comprises a hydraulic oil cylinder, a hydraulic pipeline and a hydraulic pump station, wherein the hydraulic oil output by the hydraulic pump station drives the hydraulic oil cylinder to realize that the position of the guide device on the upper part of the grid top moves from the position of the top of the down-the-hole trash rack to the position of the upstream side of the trash rack.

The invention relates to a trash cleaning grab bucket which takes a hydraulic guide groove as a guide rail at the upper part of a down-the-hole trash rack top. The electric mechanism drive mainly comprises an electric push rod or an electro-hydraulic push rod, and the position of the guide device on the upper part of the grid top is moved to the upstream side of the trash rack from the top of the trash rack by driving the push rod of the electric push rod or the electro-hydraulic push rod without influencing the position of the trash cleaning grab bucket descending along the surface of the trash rack for cleaning.

The invention relates to a trash-cleaning grab bucket which takes a hydraulic guide groove as a guide rail at the upper part of the top of a down-the-hole trash rack, and is characterized in that a hydraulic driving mechanism is used as an actuating mechanism for separating a guide device at the upper part of the top of the grid from the trash-cleaning grab bucket. The hydraulic driving mechanism mainly comprises a hydraulic oil cylinder, a hydraulic pipeline and a hydraulic pump station, wherein hydraulic oil output by the hydraulic pump station drives the hydraulic oil cylinder to realize the separation action of the guide device on the upper part of the grid top of the trash-cleaning grab bucket and the trash-cleaning grab bucket.

The invention relates to a trash-cleaning grab bucket which takes a hydraulic guide groove as a guide rail at the upper part of the top of a down-the-hole trash rack, and is characterized in that an actuating mechanism for separating a guide device at the upper part of the top of the grid from the trash-cleaning grab bucket is an electric driving mechanism. The electric driving mechanism mainly comprises an electric push rod or an electro-hydraulic push rod, and the upper guide device on the grid top of the sewage cleaning grab bucket is separated from the sewage cleaning grab bucket by driving the push rod of the electric push rod or the electro-hydraulic push rod.

The invention relates to a trash cleaning grab bucket which takes a hydraulic guide groove as a guide rail at the upper part of the top of a down-the-hole trash rack, and is characterized in that a bucket claw opening and closing mechanism is a hydraulically-driven opening and closing device. The hydraulic driving mechanism can mainly comprise a hydraulic oil cylinder, a hydraulic pipeline and a hydraulic pump station, and hydraulic oil output by the hydraulic pump station drives the hydraulic oil cylinder to realize the opening and closing of the bucket claw.

The invention relates to a trash cleaning grab bucket which takes a hydraulic guide groove as a guide rail at the upper part of the top of a down-the-hole trash rack, and is characterized in that a bucket claw opening and closing mechanism is a mechanically driven opening and closing mechanism. The opening and closing mechanism driven by the machine can be a steel wire rope pulling mechanism arranged on the trash-cleaning grab bucket, and the steel wire rope pulling mechanism pulls the grab bucket to open and close the steel wire rope, so that the opening and closing actions of the trash-cleaning grab bucket are realized.

Obviously, the invention discloses a trash cleaning grab bucket which takes a hydraulic guide groove as a guide rail at the upper part of the top of a down-the-hole trash rack, the hydraulic guide groove of the down-the-hole trash rack is used as a guide rail at the upper part of the grid top of the down-the-hole trash rack, and a complex trash cleaning grab bucket guide trash rack or a trash cleaning grab bucket guide rail is not required to be arranged at the upper part of the grid top of the down-the-hole trash rack, in particular to an established power station or a pump station, the existing downhole trash rack hydraulic guide groove is used as a guide track of a trash cleaning grab bucket on the upper part of the top of the downhole trash rack, the problem that when the dirt removing grab bucket is impacted by water flow on the upper part of the grid top of the down-the-hole dirt barrier and the dirt removing rake bucket is lowered to the grid top of the down-the-hole dirt barrier can be solved, the method can not determine the relative position relation with the trash rack, can save a large amount of engineering investment, and has wide practicability and great economic value.

Drawings

FIG. 1 is a front view and a side view of a first embodiment of the present invention

FIG. 2 is a top view of the first embodiment of the present invention

FIG. 3 illustrates a front and side view of a grab bucket grid top guide after displacement according to a first embodiment of the present invention

FIG. 4 is a top view of a grab bucket grid top guide device after displacement according to a first embodiment of the present invention

FIG. 5 is a front view and a side view of a second embodiment of the present invention

FIG. 6 is a top view of a second embodiment of the present invention

FIG. 7 front and side views of a second embodiment of the invention after displacement of the grapple fence top guide

FIG. 8 is a top view of a second embodiment of the invention after displacement of the grapple grid top guide

FIG. 9 is a front view and a side view of a third embodiment of the present invention

FIG. 10 is a top view of the third embodiment of the present invention

FIG. 11 is a front and side view of a third embodiment of the invention, shown separated from a trash bowl, of a grapple grid top guide

FIG. 12 is a top view of a third embodiment of the invention, shown separated from a trash bowl, of a grab bucket grid top guide

FIG. 13 is a front and side view of a fourth embodiment of the present invention.

Detailed Description

Fig. 1 and 2 are schematic views of a first embodiment of a cleaning grab bucket of the present invention, which is used for cleaning the dirt of a down-the-hole trash rack 8 in the figures, and which uses a hydraulic guide groove as a guide rail at the upper part of the top of the down-the-hole trash rack. The trash removal grab bucket mainly comprises a hydraulic pump station 1, a bucket frame 2, a grab bucket guide device 3, a grab bucket opening and closing mechanism 4, a grid top upper portion guide device 5, and grab buckets 6 and 7. Wherein the grid top upper part guiding device 5 consists of a shifting oil cylinder 51, a rotating support frame 52, a shifting oil cylinder 53 and a guiding roller device 54. When the trash-cleaning grab bucket descends on the upper part of the top of the down-the-hole trash rack, the guide wheels in the guide roller device 54 and positioned in the trash rack grooves 9 roll along the trash rack guide rails arranged in the down-the-hole trash rack grooves 9, the guide wheels in the guide roller device 54 and positioned outside the down-the-hole trash rack grooves 9 roll along the trash rack guide rails arranged on the side walls of the down-the-hole trash rack grooves 9, so that the trash rack guide rails arranged on the side walls of the down-the-hole trash rack grooves 9 in the down-the-hole trash rack grooves 9 form the guide rails of the upper guide devices 5 on the top of the grid, and the upper guide devices 5 on the top of the grid are connected with the trash-cleaning grab bucket, so that under the impact of water flow on the top of the down-the trash rack, the trash rack guide rails 5 provide reliable guide support for the descending movement of the trash cleaning grab bucket, the relative position relation between the position of the trash cleaning grab bucket on the top of the down-the-hole trash rack and the trash rack is determined. The bucket claw opening and closing mechanism 4 mainly comprises a bucket claw opening and closing oil cylinder and a necessary hydraulic pipeline, and the bucket claw opening and closing oil cylinder of the bucket claw opening and closing mechanism 4 is driven by the hydraulic pump station 1 to drive the bucket claw 7 to rotate so as to realize the opening and closing of the bucket claw of the trash cleaning grab.

Fig. 3 and 4 are schematic diagrams of the grab bucket grid top guide device of the first embodiment of the trash cleaning grab bucket of the invention, which takes a hydraulic guide groove as a guide track on the upper part of the down-the-hole type trash rack grid top, after displacement. When the trash cleaning grab bucket descends to the trash rack top position under the action of the rack top guide device 5, the shifting oil cylinder 53 of the rack top upper guide device 5 is driven by the hydraulic pump station 1 to move the guide wheel device of the guide roller device 54 positioned in the down-the-hole trash rack groove 9 out of the down-the-hole trash rack groove 9, then the shifting oil cylinder 51 of the rack top upper guide device 5 is driven by the hydraulic pump station 1 to drive the rotating support frame 52 to rotate upstream, and the shifting oil cylinder 53 and the guide roller device 54 move to the upstream of the trash rack, so that the trash cleaning operation of the trash grab bucket along the rack surface is not influenced by the rack top upper guide device. Therefore, the sewage disposal grab bucket takes the down-the-hole type sewage barrier guide rail as the guide rail, the problem that the sewage disposal grab bucket cannot be accurately positioned with the sewage barrier in the descending process due to the impact of water flow can be solved without arranging a complex sewage disposal grab bucket guide rail or a sewage disposal grab bucket guide rail on the upper part of the top of the sewage barrier, and a large amount of engineering investment can be saved, so that the sewage disposal grab bucket has wide practicability and great economic value.

Fig. 5 and 6 are schematic views of a second embodiment of a cleaning grab bucket of the invention, which is used for cleaning the dirt of the down-the-hole trash rack 8 in the figure, and which uses a hydraulic guide groove as a guide rail at the upper part of the top of the down-the-hole trash rack. The trash removal grab bucket mainly comprises a hydraulic pump station 1, a bucket frame 2, a guide device 3, a bucket claw opening and closing mechanism 4, a grid top upper portion guide device 5, and bucket claws 6 and 7. Wherein the grid top upper part guiding device 5 consists of a shifting oil cylinder 51, a rotating support frame 52, a shifting oil cylinder 53 and a guiding roller device 54. When the trash-cleaning grab bucket descends on the upper part of the top of the down-the-hole trash rack, the guide device 5 on the upper part of the grid top rolls along the inner wall of the down-the-hole trash rack groove 9, and the guide wheel tread of the guide roller device 54 rolls along the side wall of the down-the-hole trash rack groove 9, so that the inner wall and the side wall of the down-the-hole trash rack groove 9 form a guide rail of the guide device 5 on the upper part of the grid top, and the guide device 5 on the upper part of the grid top is connected with the trash-cleaning grab bucket, so that under the action of the inner wall and the side wall of the down-the-down-the trash rack groove 9, the guide device 5 on the upper part of the grid top provides reliable guide support for the descending movement of the trash-cleaning grab bucket, and the trash grab bucket has a determined relative position relation with the trash rack on the top of the down-the trash rack. The bucket claw opening and closing mechanism 4 mainly comprises a bucket claw opening and closing oil cylinder and a necessary hydraulic pipeline, and the bucket claw opening and closing oil cylinder of the bucket claw opening and closing mechanism 4 is driven by the hydraulic pump station 1 to drive the bucket claw 7 to rotate so as to realize the opening and closing of the bucket claw of the trash cleaning grab.

Fig. 7 and 8 are schematic diagrams of the grab bucket grid top guide device of the second embodiment of the trash cleaning grab bucket of the invention, which takes the hydraulic guide groove as the guide track at the upper part of the down-the-hole type trash rack grid top, after displacement. When the cleaning grab bucket descends to the top position of the down-the-hole type trash rack under the action of the grid top guide device 5, the shifting oil cylinder 53 of the grid top upper guide device 5 is driven by the hydraulic pump station 1 to move the guide wheel rim of the guide roller device 54 out of the down-the-hole type trash rack groove 9, then the shifting oil cylinder 51 of the grid top upper guide device 5 is driven by the hydraulic pump station 1 to drive the rotary support frame 52 to rotate towards the upstream of the trash rack, and the shifting oil cylinder 53 and the guide roller device 54 move towards the upstream, so that the dirt cleaning operation of the cleaning grab bucket along the grid surface is not influenced by the grid top guide device. Therefore, the trash cleaning grab bucket takes the down-the-hole trash rack groove as the guide rail, the problem that the trash cleaning grab bucket cannot be accurately positioned with the trash rack in the descending process due to the impact of water flow can be solved without arranging a complex trash cleaning grab bucket guide trash rack or a trash cleaning grab bucket guide rail on the upper portion of the top of the down-the-hole trash rack, and the existing down-the-hole trash rack groove is used as the guide rail of the trash cleaning grab bucket on the upper portion of the top of the trash rack, so that a large amount of engineering investment can be saved, and the trash cleaning grab bucket has wide practicability and higher economic value.

Fig. 9 and 10 are schematic views of a third embodiment of the invention of a dredging grab bucket with a hydraulic guide groove as a guide track on the upper part of the top of a down-the-hole trash rack, which is used for the dirt cleaning work of the down-the-hole trash rack 8 in the figure. The trash removal grab bucket mainly comprises a hydraulic pump station 1, a bucket frame 2, a guide device 3, a bucket claw opening and closing mechanism 4, a grid top upper portion guide device 5, and bucket claws 6 and 7. Wherein the grid top upper guide device 5 consists of a displacement oil cylinder 51, a rotating support frame 52 and separating oil cylinders 53 and 54. When the cleaning grab bucket descends on the top of the down-the-hole trash rack, the guide wheel in the down-the-hole trash rack groove 9 in the guide beam 54 rolls along the inner wall of the down-the-hole trash rack groove 9, the guide wheel outside the down-the-hole trash rack groove 9 in the guide beam 54 rolls along the side wall of the down-the-hole trash rack groove 9, the inner wall and the side wall of the down-the-hole trash rack groove 9 form a guide track of the guide device 5 at the upper part of the rack top, the upper guide device 5 of the grid top is connected with the trash-cleaning grab bucket, so under the action of the inner wall and the side wall of the down-the-hole trash rack groove 9, the guide device 5 on the upper part of the grid top provides reliable guide support for the descending motion of the trash-cleaning grab bucket, and the problem that the trash-cleaning grab bucket has a determined relative position relation with the trash rack at the position of the grid top of the down-the-hole trash rack under the impact of water flow on the upper part of the trash rack top is solved. The bucket claw opening and closing mechanism is a set of mechanically driven opening and closing mechanism, the mechanical opening and closing mechanism mainly comprises a lifting steel wire rope and an opening and closing steel wire rope, and when the lifting steel wire rope and the opening and closing steel wire rope are oppositely pulled upwards or downwards, the rotatable bucket claw 7 of the cleaning grab bucket can be opened or closed, so that the bucket claw can be opened and closed.

Fig. 11 and 12 are schematic views of the guide of a third embodiment of the trash grab bucket of the invention with a hydraulic guide groove as a guide rail at the upper part of the top of the down-the-hole trash rack. When the trash cleaning grab bucket descends to the top position of the trash rack under the action of the grid top guide device, the separation oil cylinder 53 of the grid top upper guide device 5 is driven by the hydraulic pump station 1 to separate the guide beam 54 from the rotary support frame 52, then the shift oil cylinder 51 of the grid top upper guide device 5 is driven by the hydraulic pump station 1 to drive the rotary support frame 52 to rotate upstream, the separation oil cylinder 53 and the rotary support frame 52 move upstream to ensure that the separation oil cylinder 53 and the rotary support frame 52 do not influence the trash cleaning operation of the trash cleaning grab bucket along the grid surface, and meanwhile, the guide beam 54 is temporarily stored at the top position of the trash rack. After the movement of descending the trash-cleaning grab along the grid surface to clean the trash is completed, the trash-cleaning grab can be lifted to the top position of the trash rack, the hydraulic pump station 1 is operated to drive the shifting oil cylinder 51 to move the separating oil cylinder 53 and the rotating support frame 52 to the upper part of the guide beam 54, then the hydraulic pump station 1 is operated to drive the separating oil cylinder 53 to connect the rotating support frame 52 with the guide beam 54, and the trash-cleaning grab drives the guide beam 54 to be lifted together to prepare for descending and trash cleaning of the next trash-cleaning grab. Therefore, the sewage disposal grab bucket takes the downhole type sewage barrier hydraulic guide groove as the guide track, the complex sewage disposal grab bucket guide sewage barrier or the sewage disposal grab bucket guide track is not required to be arranged at the upper part of the top of the downhole type sewage barrier, the problem that the sewage disposal grab bucket cannot be accurately positioned with the sewage barrier in the descending process due to the impact of water flow can be solved by using the conventional downhole type sewage barrier hydraulic guide groove as the guide track of the sewage disposal grab bucket at the upper part of the top of the downhole type sewage barrier, a large amount of engineering investment can be saved, and the sewage disposal grab bucket has wide practicability and higher economic value.