CN211646673U

CN211646673U - Municipal administration road drainage structure

Info

Publication number: CN211646673U
Application number: CN202020080118.0U
Authority: CN
Inventors: 凌受钊
Original assignee: Sichuan Zhaoshuo Construction Engineering Co ltd
Current assignee: Sichuan Zhaoshuo Construction Engineering Co ltd
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2020-10-09
Anticipated expiration: 2030-01-14

Abstract

The utility model relates to a town road drainage structure, it includes a plurality of wells and communicates a plurality of wells in drainage pipe of an organic whole, and the dirty groove of collection has been seted up to drainage pipe's below, and the vertical trash cleaning well of seting up and collecting the dirty groove intercommunication in one side of well has seted up the drain on drainage pipe's the diapire, rotates on drainage pipe's the diapire to be provided with the apron that is used for the switching drain, is provided with on the inner wall of well to be used for restricting the spacing subassembly of apron pivoted. When the mediation scale removal operation, put into the dirty groove of collection with the immersible pump from the well of decontaminating earlier, make the apron on the drainage pipe diapire turn over downwards and open after that, make the impurity rubbish of jam in drainage pipe flow in the dirty groove of collection from the drain, later, take impurity out from the dirty groove of collection through the immersible pump, handle, effectively remove from that operating personnel is manual clears up rubbish in the sewer pipe from, the utility model discloses it is laborsaving quick to have the clearance mediation work, improves the effect of dredging drainage pipe efficiency.

Description

Municipal administration road drainage structure

Technical Field

The utility model belongs to the technical field of municipal drainage structure's technique and specifically relates to a sewage structure under town road.

Background

The municipal roadside drainage facility system is a whole set of engineering facility consisting of structures such as a sewer port, a rainwater pipe channel, an inspection well, a water outlet and the like, and has the function of quickly removing rain and snow on the ground in time so as to ensure normal traffic of vehicles and pedestrians, improve the sanitary condition of cities and avoid damage to a pavement structure due to water immersion.

Chinese patent with publication number CN206752244U discloses an anti-blocking dredging drainage system for urban roads, which comprises a roadbed, a road surface, a drainage ditch, a net plate, a slurry pump, a sludge storage chamber and a material lifting cavity, wherein the roadbed is provided with the road surface, the right side of the roadbed is provided with the drainage ditch, the drainage ditch is provided with a flow guide inclined plane, a groove accommodating frame and the net plate, and the right side of the drainage ditch is provided with road teeth, the slurry pump and the sludge storage chamber; the input end of the mud pump is provided with a sewage cleaning pipe, the right side of the sludge storage chamber is provided with a material lifting cavity, and the material lifting cavity is provided with a material lifting motor, a rotating shaft, a spiral lifting blade, a feeding pipe, a filter screen and a drain pipe. According to the design, impurities are injected into the material lifting cavity through a mud pump, and then sludge impurities are pumped out through the spiral lifting blades.

The above prior art solutions have the following drawbacks: to subaerial drainage pipe, in case silt and floccule rubbish are too much in the drainage pipe, will cause the pipeline to block, the drainage function inefficacy causes the road ponding serious, influences the normal current of pedestrian's vehicle, can cause the vehicle to intake even, harm people's life and property safety, and the sewer well opening of road is less usually, and desilting staff is difficult to carry out the performance in sewer well and moves by a wide margin and clear up drainage pipe, and very hard, desilting work difficulty and inefficiency.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, one of the purposes of the utility model is to provide a convenient desilting town road drainage structure.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a municipal road drainage structure comprises a plurality of drainage wells and drainage pipelines which connect the drainage wells into a whole, the cross section of the drainage pipeline is square, a sewage collecting groove is arranged below the drainage pipeline, the sewage collecting groove is positioned under the sewage well, one side of the sewage well is vertically provided with a sewage cleaning well for placing a submersible pump in parallel, the bottom end of the sewage disposal well is communicated and integrated with the sewage collection groove, the bottom wall of the drainage pipeline is provided with a sewage discharge outlet communicated with the drainage pipeline and the sewage collection groove, the sewage draining exit is positioned under the sewer well, the projection of the sewage draining exit on the horizontal plane extends to the two sides of the projection of the sewer well on the horizontal plane along the length direction of the drainage pipeline, the sewage draining device is characterized in that a cover plate for opening and closing a sewage draining outlet is rotatably arranged on the bottom wall of the drainage pipeline, and a limiting assembly for limiting the rotation of the cover plate is arranged on the inner wall of the sewer well.

By adopting the technical scheme, when an operator conducts dredging and descaling operation on the blocked drainage pipeline, the submersible pump is firstly placed in the sewage collection groove by using the hanging bracket from the sewage disposal well, the submersible pump is placed in the sewage collection groove, then the limit component is untied from the sewer well, the cover plate on the bottom wall of the drainage pipeline is turned over downwards and opened, so that impurity garbage blocked in the drainage pipeline and positioned at the front and the back of the sewer well flows into the sewage collection groove from the sewage discharge outlet, then the submersible pump is opened, sewage and impurities are pumped out from the sewage collection groove for treatment, after the cleaning is finished, the sewage collection groove is cleaned by using clean water from the sewer well, the cover plate is turned over to be horizontal again, the upper sewage discharge outlet of the drainage pipeline is sealed, the cover plate is fixed by the limit component again, and finally the submersible pump is taken out, so that the dredging operation on the drainage pipeline is finished, and the manual cleaning of the, the cleaning and dredging work is labor-saving and quick, and the cleaning and dredging drainage pipeline is high in efficiency.

The present invention may be further configured in a preferred embodiment as: the limiting assembly comprises a pull rope, a lifting ring and a bolt, the rotation axis of the cover plate is parallel to the length direction of the drainage pipeline, one end of the pull rope is fixedly connected to the top surface of the cover plate, the other end of the pull rope is fixedly connected to the outer wall of the lifting ring, a threaded hole is formed in the inner wall of the drainage well, the bolt is in threaded connection with the threaded hole, and the lifting ring is sleeved on the bolt, and the pull rope pulls the cover plate to close the drain outlet.

Through adopting above-mentioned technical scheme, operating personnel upwards overturn the apron to seal the drain, use the bolt to pass the rings that stay cord connected under the straight state of tightening on the apron to screw up the bolt screw thread in the screw thread on the lower well inner wall, fix the apron position fast promptly, the simple operation.

The present invention may be further configured in a preferred embodiment as: the threaded hole is coaxially provided with an insertion hole inside, and one end of the bolt, which is far away from the head of the bolt, is coaxially and fixedly provided with an extension rod.

Through adopting above-mentioned technical scheme, when operating personnel unties the bolt, screw rod with the screw thread on the bolt is twisted out from the screw hole earlier, and make on the bolt extension rod still keep inserting the screw hole state, hold the bolt by operating personnel again, and pull out the bolt from screw hole and rings, when effectively avoiding the apron to overturn fast under the action of gravity of impurity in drainage pipe, operating personnel is unstable owing to holding the bolt after unscrewing and sending the bolt, cause the bolt to fall into a great deal of inconvenience that brings in the drainage pipe, improve bolt operation convenience.

The present invention may be further configured in a preferred embodiment as: the bottom wall of the sewage collecting groove inclines downwards to the projection area of the sewage cleaning well on the bottom wall of the sewage collecting groove.

Through adopting above-mentioned technical scheme, after the drain is opened, impurity falls into the dirty groove of collection in the drainage pipe to the clean water pump of the dirty well below slides in the dirty inslot of collection, and is taken out by the immersible pump, thereby improves the clearance effect of the dirty inslot impurity of collection.

The present invention may be further configured in a preferred embodiment as: the filter is characterized in that a filter pocket is arranged in the sewer well, a notch is formed in the edge of an upper opening of the sewer well, and a hanging plate matched with the notch is fixedly arranged at the top of the filter pocket.

Through adopting above-mentioned technical scheme, operating personnel is utilizing the immersible pump to take impurity and the sewage of dirty inslot of collection out the back, can follow the top of lower well and discharge into the lower well once more, pour into sewer pipe-line in-process once more at impurity and sewage from the well head of a sewer, filter impurity by straining the pocket, thereby make operating personnel can constantly take the in-process of taking out in the dirty inslot of collection and filter in straining the pocket, and will strain the pocket by operating personnel and tear out the back, carry out centralized processing to impurity, effectively avoid operating personnel directly to discharge sewage and impurity on the road surface, cause the pollution to the surrounding environment, the environmental protection effect in the desilting work is improved.

The present invention may be further configured in a preferred embodiment as: the hanging plate is provided with a handle.

Through adopting above-mentioned technical scheme, operating personnel will strain the pocket and take out from the lower well when, can be directly to holding the handle on straining the pocket, will strain the pocket and mention from the lower well, concentrate to topple over the processing to straining interior impurity of pocket, improve operating personnel clearance and strain the pocket convenience.

The present invention may be further configured in a preferred embodiment as: the sewage disposal well is internally provided with a lifting assembly for lifting the submersible pump, the lifting assembly comprises a lifting plate, a winding drum, a rocking handle and a lifting rope, the lifting plate is arranged in the sewage disposal well in a sliding mode along the vertical direction, an installing platform is arranged at the upper opening of the sewage disposal well, an installing frame is arranged on the installing platform, the winding drum is arranged on the installing frame in a rotating mode, the axis of the winding drum is horizontal, the lifting rope is wound on the winding drum, one end of the lifting rope is fixedly connected with the winding drum, the other end of the lifting rope is fixedly connected with the top wall of the lifting plate, and one end of the rocking handle is fixedly connected with one end of.

Through adopting above-mentioned technical scheme, operating personnel is when putting into the well of decontaminating with the immersible pump, and manual rotation rocking handle drives the reel and rotates to the rolling lifting rope makes the lifter plate rise in the well of decontaminating, puts the immersible pump on the lifter plate after that, rotates the rocking handle again, can make the immersible pump go up and down in the well of decontaminating, saves operating personnel and erects the gallows at the well head of decontaminating, makes the lifting and placing convenient operation of immersible pump quick.

The present invention may be further configured in a preferred embodiment as: the winding drum is characterized in that a limiting part used for limiting rotation of the winding drum is arranged on the mounting frame, the limiting part is an insert rod, an outer toothed ring is coaxially and fixedly sleeved on the outer wall of one end of the winding drum, the insert rod is vertically arranged on the mounting frame in a sliding mode, and the bottom end of the insert rod can be inserted into the upper portion of the outer toothed ring.

Through adopting above-mentioned technical scheme, when operating personnel rotatory rocking handle, mention the inserted bar earlier, make the inserted bar break away from with the outer ring gear on the reel, rise the back with the lifter plate again, release the inserted bar to make the inserted bar peg graft on outer ring gear, can fix the reel, thereby the operating personnel of being convenient for puts or takes out the immersible pump on the lifter plate, improve the immersible pump and get the convenience.

To sum up, the utility model discloses a following at least one useful technological effect:

1. when an operator conducts dredging and descaling operation on the blocked drainage pipeline, firstly, the submersible pump is placed into the sewage collection groove from the sewage removal well, then the cover plate on the bottom wall of the drainage pipeline is turned downwards to be opened, so that impurity garbage blocked in the drainage pipeline flows into the sewage collection groove from the sewage discharge port, then, the impurity is pumped out of the sewage collection groove through the submersible pump for treatment, the manual cleaning of the garbage in the sewer pipeline by the operator is effectively avoided, the cleaning and dredging work is labor-saving and rapid, and the efficiency of cleaning and dredging the drainage pipeline is high;

2. after the impurities and the sewage in the sewage collecting tank are pumped out by the submersible pump, the impurities and the sewage are discharged into the sewer well from the upper part of the sewer well again, and the impurities are filtered by the filter bag, so that the situation that the sewage and the impurities are directly discharged on a road surface by an operator to pollute the surrounding environment is effectively avoided, and the environment-friendly effect in dredging work is improved;

3. when an operator puts the submersible pump into the sewage disposal well, the rocking handle is manually rotated to drive the winding drum to rotate, the lifting rope is wound to lift the lifting plate in the sewage disposal well, then the submersible pump is put on the lifting plate, and the rocking handle is rotated again, so that the submersible pump can lift in the sewage disposal well, the hanging bracket is erected at the wellhead of the sewage disposal well by the operator, and the lifting operation of the submersible pump is convenient and quick.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of a partial cross-sectional structure of the pavement of the present invention.

Fig. 3 is another schematic partial sectional structure of the pavement of the present invention.

Fig. 4 is a partially enlarged schematic view of a portion a in fig. 3.

Fig. 5 is a schematic structural diagram of the lifting assembly of the present invention.

In the figure, 1, a drainage well; 11. filtering the bag; 12. a notch; 13. a hanging plate; 14. a handle; 2. a water discharge pipeline; 21. a sewage draining outlet; 3. a sewage collecting tank; 4. cleaning a sewage well; 5. a cover plate; 6. a limiting component; 61. pulling a rope; 62. a hoisting ring; 63. a bolt; 64. a threaded hole; 65. an extension pole; 7. a lifting assembly; 71. a lifting plate; 72. a reel; 73. a rocking handle; 74. a lifting rope; 75. inserting a rod; 76. an outer ring gear; 77. an installation table; 78. and (7) mounting frames.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the utility model discloses a municipal administration road drainage structure, include a plurality of wells 1 and communicate a plurality of wells 1 in drainage pipe 2 of an organic whole. The sewer well 1 is vertically arranged on the ground, a well cover used for sealing the sewer well 1 is movably placed at the upper well mouth, the drainage pipeline 2 is horizontally laid under the ground, and the cross section of the drainage pipeline is square. The sewage collecting tank 3 is arranged below the drainage pipe and is positioned right below the drainage well 1, the projection of the sewage collecting tank on the horizontal plane and the overlapped area of the projection of the drainage pipe 2 extend to two sides of the plane projection of the drainage well 1 in the length direction of the drainage pipe 2. The depth of the sewage collection groove 3 is not less than the width of the drainage pipeline 2, and the two edges parallel to the width direction of the drainage pipeline 2 are inclined to the middle part on the bottom wall of the sewage collection groove 3. The ground is provided with a sewage disposal well 4 parallel to the sewage disposal well 1 on one side of the sewage disposal well 1, and a well cover used for sealing the sewage disposal well 4 is movably placed at the top well mouth of the sewage disposal well 4. The sewage collecting groove 3 extends to one side of the drainage pipeline 2 along the width direction of the drainage pipeline 2, and the bottom of the sewage cleaning well 4 is communicated with the top wall of the sewage collecting groove 3 far away from one end of the drainage pipeline 2. The bottom wall of the sewage collection groove 3 is inclined towards the range of the bottom wall of the sewage collection groove 3 which is just opposite to the lower part of the sewage disposal well 4 along the width direction of the drainage pipeline 2, and the horizontal height of the bottom wall of the sewage collection groove which is close to one end of the sewage disposal well 4 is a lower end. The integrative polytetrafluoroethylene board that has laid on the diapire in dirty groove 3 of collection for in reducing the friction between impurity and the dirty groove 3 diapalls of collection, accelerate impurity flow rate.

Referring to fig. 2 and 3, a drain outlet 21 is formed in the bottom wall of the drainage pipeline 2, the drain outlet 21 communicates the drainage pipeline 2 with the sewage collecting groove 3, and the length of the drain outlet is matched with the length of the contact surface between the sewage collecting groove 3 and the drainage pipeline 2. The bottom wall of the drainage pipeline 2 is hinged with a cover plate 5 with the size slightly larger than that of the drain outlet 21, the cover plate can seal the drain outlet 21, and a hinged shaft of the cover plate is parallel to the length direction of the drainage pipeline 2 and is positioned at the edge of the bottom wall of the drainage pipeline 2, which is far away from the sewage disposal well 4. The cover plate 5 can be fixedly bonded with a rubber sealing ring on the surface contacted with the drainage pipeline 2, and the sealing ring is provided with a circle along the circumferential direction of the cover plate 5 and used for completely sealing the drain outlet 21 by the cover plate 5.

Referring to fig. 3 and 4, a limiting assembly 6 for limiting the rotation of the cover plate 5 is disposed on the inner wall of the sewer well 1, and in this embodiment, the limiting assembly 6 includes a pull rope 61, a hanging ring 62 and a bolt 63. Stay cord 61 is wire rope, and fixed ligature is on the roof of apron 5, and the position welding that the self articulated shaft was kept away from to the roof of apron 5 has the collar that supplies stay cord 61 ligature, and rings 62 ligature is kept away from the one end of apron 5 at stay cord 61. The side wall of the drainage well 1 is also provided with a threaded hole 64, and the axis of the threaded hole 64 is horizontal or inclined downwards along the direction far away from the central line of the drainage well 1. The axis of the threaded bore 64 is horizontal in this embodiment. The end of the bolt 63 far away from the head of the bolt is also coaxially and integrally formed with a cylindrical extension rod 65, and the diameter of the extension rod 65 is not larger than the small diameter of the bolt 63 with an external thread section. The bottom wall of the threaded hole 64 is provided with an insertion hole into which the extension rod 65 can be inserted. When the bolt 63 passes through the hanging ring 62 and is screwed in the threaded hole 64, the pull rope 61 pulls the cover plate 5 to be horizontal, the sewage discharge opening 21 is closed, and the pull rope 61 is in a stretched straight state.

Referring to fig. 3 and 4, a top wellhead of the drainage well 1 is provided with a notch 12 on two parallel side walls. The filtering bag 11 is made of metal wires, two hanging plates 13 are welded and fixed to the top of the filtering bag, and metal handles 14 are vertically welded to the top walls of the hanging plates 13 respectively. When the filter bag 11 is movably placed in the sewer well 1, the two hanging plates 13 are respectively placed in the two gaps 12 of the sewer well 1.

Referring to fig. 2 and 5, a lifting assembly 7 for lifting a submersible pump is arranged in the sewage disposal well 4, and in the embodiment, the lifting assembly 7 comprises a lifting plate 71, a winding drum 72, a crank 73 and a lifting rope 74. Two sliding grooves are respectively formed in the two vertical inner walls, parallel to the width direction of the pipeline, of the sewage disposal well 4 in the vertical direction, two sliding blocks are integrally formed on the lifting plate 71, and the sliding blocks respectively slide in the sliding grooves of the sewage disposal well 4. The mount table 77 has been seted up to the well head position of well 4 of decontaminating, and mounting bracket 78 fix with screw is on mount table 77, and the both ends of mounting bracket 78 are the triangular supports, and the axis of rotation at reel 72 both ends rotates respectively to be connected on mounting bracket 78, and the axis of spool is the level. The rotating shaft at one end of the winding drum 72 penetrates through the mounting frame 78, and one end of the rocking handle 73 is fixedly connected with the rotating shaft of the winding drum 72 penetrating through the mounting frame 78. The lifting rope 74 is wound around the winding drum 72, and one end of the lifting rope is fixedly connected to the winding drum 72, and the other end of the lifting rope is fixedly bound to the top wall of the lifting plate 71. An outer gear ring 76 is coaxially fixedly sleeved at one end of the winding drum 72. A support sheet covered above the outer toothed ring 76 is welded on the mounting frame 78 at the same side as the outer toothed ring 76, an inserted rod 75 is vertically inserted in a sliding manner on the support sheet, and teeth matched with the teeth on the outer toothed ring 76 are arranged at the bottom of the inserted rod 75. The rotation of the spool 72 is restricted by the insertion of the rod 75 into the outer ring gear 76.

The implementation principle of the embodiment is as follows: when an operator conducts dredging and descaling operation on the blocked drainage pipeline 2, the submersible pump is firstly placed from the sewage disposal well 4 by using the hanging bracket, and the submersible pump is placed in the sewage collection tank 3. Then, the bolt 63 on the inner wall of the drainage well 1 is loosened, and the bolt 63 is pulled out from the threaded hole 64 on the drainage well 1 and the hanging ring 62 connected to the cover 5 by the pulling rope 61. The cover plate 5 on the bottom wall of the drainage pipeline 2 is turned downwards and opened, so that the impurity garbage blocked in the drainage pipeline 2 and positioned at the front and the rear of the sewer well 1 quickly flows into the sewage collecting groove 3 from the sewage outlet 21 on the bottom wall of the drainage pipeline 2. Then, the submersible pump is started to pump out the sewage and the impurities from the sewage collecting tank 3 for treatment. And after the dirt in the dirt collecting groove 3 is completely pumped out, clear water is poured from the sewer well 1 to clean the dirt collecting groove 3. After the sewage collecting tank 3 is cleaned, the cover plate 5 is turned over to be horizontal again, the sewage discharge opening 21 of the water discharge pipeline 2 is closed, and the cover plate 5 is fixed by using the bolt 63 again, penetrating the hanging ring 62 and being screwed on the side wall of the sewer well 1. And finally, pumping the cleaning water in the sewage collecting tank 3 by using a submersible pump, stopping the submersible pump, and taking out the submersible pump to finish the dredging work of the drainage pipeline 2. Effectively remove operating personnel from and manually clear up the interior rubbish of sewer pipe, the clearance mediation work is laborsaving quick, and it is efficient to clear up drainage pipe 2.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a town road drainage structure, includes a plurality of wells (1) and communicates a plurality of wells (1) in drainage pipe (2) of an organic whole, its characterized in that: the cross-sectional shape of drainage pipe (2) is square, the dirty groove (3) of collection has been seted up to the below of drainage pipe (2), dirty groove (3) of collection is located the lower well (1) under, one side of lower well (1) is side by side vertical offers the well (4) of decontaminating that is used for putting into the immersible pump, the bottom and the dirty groove (3) intercommunication and an organic whole of decontamination well (4), set up drain (21) of intercommunication drainage pipe (2) and collection dirty groove (3) on the diapire of drainage pipe (2), drain (21) are located the lower well (1) under, drain (21) projection on the horizontal plane extends to the both sides of lower well (1) projection on the horizontal plane along drainage pipe (2) length direction, it is provided with apron (5) that are used for switching drain (21) to rotate on the diapire of drainage pipe (2), and a limiting component (6) for limiting the rotation of the cover plate (5) is arranged on the inner wall of the sewer well (1).

2. The town road launching structure according to claim 1, wherein: spacing subassembly (6) include stay cord (61), rings (62) and bolt (63), the rotation axis of apron (5) is on a parallel with the length direction of drainage pipe (2), the one end rigid coupling of stay cord (61) is on the top surface of apron (5), the other end rigid coupling is on the outer wall of rings (62), set up threaded hole (64) on the inner wall of sewer well (1), bolt (63) and threaded hole (64) threaded connection, when rings (62) cup joint on bolt (63), drain (21) are closed in stay cord (61) pulling apron (5).

3. The municipal road drainage structure according to claim 2, wherein: the threaded hole (64) is coaxially provided with an insertion hole, and one end of the bolt (63) far away from the head of the bolt is coaxially and fixedly provided with an extension rod (65).

4. The town road launching structure according to claim 1, wherein: the bottom wall of the sewage collecting groove (3) inclines downwards to the projection area of the sewage cleaning well (4) on the bottom wall of the sewage collecting groove (3).

5. The town road launching structure according to claim 1, wherein: the improved sewage filter is characterized in that a filter pocket (11) is arranged in the sewage well (1), a notch (12) is formed in the edge of an upper opening of the sewage well (1), and a hanging plate (13) matched with the notch (12) is fixedly arranged at the top of the filter pocket (11).

6. The municipal road drainage structure according to claim 5, wherein: the hanging plate (13) is provided with a handle (14).

7. The town road launching structure according to claim 1, wherein: be provided with lifting unit (7) that is used for going up and down the immersible pump in trash-cleaning well (4), lifting unit (7) include lifter plate (71), reel (72), rocking handle (73) and lifting rope (74), lifter plate (71) slide along vertical direction and set up in trash-cleaning well (4), mount table (77) have been seted up to the upper shed of trash-cleaning well (4), be provided with mounting bracket (78) on mount table (77), reel (72) rotate and set up on mounting bracket (78), the axis level of reel (72), lifting rope (74) are around establishing on reel (72), the one end of lifting rope (74) and the roof rigid coupling of reel (72) rigid coupling, the other end and lifter plate (71), the coaxial one end of one end rigid coupling of rocking handle (73) is in the one end of reel (72).

8. The municipal road drainage structure according to claim 7, wherein: be provided with on mounting bracket (78) and be used for restricting reel (72) pivoted locating part, the locating part is inserted bar (75), coaxial fixed cover is equipped with outer ring gear (76) on the outer wall of the one end of reel (72), inserted bar (75) vertical slip sets up on mounting bracket (78), the bottom of inserted bar (75) can be pegged graft in the upper portion of outer ring gear (76).