CN217121020U

CN217121020U - Side slope removes algae with novel cavitation jet washing dolly

Info

Publication number: CN217121020U
Application number: CN202220233358.9U
Authority: CN
Inventors: 于磊; 李佳琪; 石晓辉; 赵永强; 耿继涛; 荆丛; 乔娜
Original assignee: Huanghe Machinery Co ltd
Current assignee: Huanghe Machinery Co ltd
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2022-08-05
Anticipated expiration: 2032-01-28

Abstract

The utility model provides a side slope removes algae and uses novel cavitation jet cleaning trolley, it is including whole rectangle and the open housing in bottom that is, the length direction of housing sets up along left right direction, four angles at housing top are equipped with a mount pad respectively, every mount pad all is equipped with a universal wheel, the lower side that the lower part of universal wheel is less than the housing, be equipped with on the housing and hang flexible coupling assembling, the housing middle part is equipped with a plurality of rotation type cavitation water jet subassembly along the even interval of left right direction, the center of all rotation type cavitation water jet subassemblies is located along a straight line of left right direction, the high pressure water source of outside supply is through setting up at the distribution valve of housing top and high pressure water pipe evenly distributed to every rotation type cavitation water jet subassembly, housing top side department is equipped with the drain mouth subassembly. The utility model relates to a rationally, simple structure, easily make, with low costs, efflux area of coverage big, improve the clean efficiency to the channel side slope, the life of each part is longer, clean effect also strengthens greatly.

Description

Side slope removes algae with novel cavitation jet cleaning dolly

Technical Field

The utility model belongs to the technical field of water treatment, concretely relates to side slope removes algae with novel cavitation jet washing dolly.

Background

Patent No. zl201910815723.x discloses an underwater cavitation jet cleaning device for removing channel side slope algae mud mixture, which has the following disadvantages or shortcomings: 1. the housing adopts a special-shaped structure, the manufacturing process is complicated, and the cost is high; 2. although the adopted elastic vertical connecting component can cling the device to the side slope of the channel with a certain pre-pressing force, the universal wheel is stressed greatly and is easy to damage; 3. three cleaning disc assemblies which are arranged in an obtuse triangle are adopted, so that the coverage area is small although no dead angle exists in the coverage; 4. the high-pressure rotary joint is purchased in the market, and works in water, so that the working environment is severe, and the high-pressure rotary joint is easy to damage, so that the three spray pipes are unsmooth in rotation during working, and the cleaning effect is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a slope removes algae and uses novel cavitation jet cleaning trolley which the structure is simpler, easily make, disposable cover clear away the area big, the part is more durable.

In order to solve the technical problem, the utility model adopts the following technical scheme: the utility model provides a side slope removes algae and uses novel cavitation jet cleaning trolley, it is including whole rectangle and the open housing in bottom that is, the length direction of housing sets up along left right direction, four angles at housing top are equipped with a mount pad respectively, every mount pad all is equipped with a universal wheel, the lower side that the lower part of universal wheel is less than the housing, be equipped with on the housing and hang flexible coupling assembling, the housing middle part is equipped with a plurality of rotation type cavitation water jet subassembly along the even interval of left right direction, the center of all rotation type cavitation water jet subassemblies is located along a straight line of left right direction, the high pressure water source of outside supply is through setting up at the distribution valve of housing top and high pressure water pipe evenly distributed to every rotation type cavitation water jet subassembly, housing top side department is equipped with the drain mouth subassembly.

The rotary type cavitation water jet assembly comprises a positioning clamping piece, a high-pressure rotary joint, spray pipes and cavitation jet nozzles, wherein the top of the housing is provided with a mounting hole, the high-pressure rotary joint comprises a cylindrical fixed cylinder and a rotary cylinder arranged in the fixed cylinder, the fixed cylinder is vertically assembled in the mounting hole, the positioning clamping piece is sleeved on the excircle of the fixed cylinder and clamps the fixed cylinder tightly, the positioning clamping piece is arranged at the top of the housing and is connected with the housing through bolts, the inner circle of the upper port of the fixed cylinder is provided with an inner thread for connecting a high-pressure water pipe, the part of the lower end of the rotary cylinder, which extends out of the fixed cylinder, is of a hexagonal prism structure, the lower port of the rotary cylinder is in threaded connection with a plug, the spray pipes are provided with three, the inner ends of the three spray pipes are in threaded connection with the lower side part of the rotary cylinder and are uniformly arranged along the circumferential direction of the central line of the rotary cylinder, the outer end of each spray pipe is connected with one cavitation jet nozzle, and the three cavitation jet nozzles are all arranged in a downward inclination manner, the jet direction of the cavitation jet nozzle is equal to the included angle of the jet pipe and is consistent with the direction of the jet pipe.

The open stepped mounting groove of lower extreme has been seted up to circle lower part in the solid fixed cylinder, the rotatory section of thick bamboo upper end stretches into in the stepped mounting groove with the axial, be equipped with annular tang structure between rotatory section of thick bamboo upper end and the stepped mounting groove upper end inboard, the ceramic bearing through two upper and lower interval arrangement between the circle in rotatory section of thick bamboo excircle and the stepped mounting groove rotates and is connected, be equipped with the position sleeve of cover on the rotatory section of thick bamboo between two ceramic bearings, the solid fixed cylinder lower extreme is equipped with the bearing gland, bearing gland upper portion threaded connection under the stepped mounting groove port and with the ceramic bearing outer lane crimping of lower part, circle and rotatory section of thick bamboo clearance fit in the bearing gland lower part, position sleeve upper end and lower extreme contact with the ceramic bearing inner race on upper portion and lower part respectively, the tip is equipped with the spacing ring on the rotatory section of thick bamboo excircle, the spacing ring lower extreme contacts with the ceramic bearing upper end on upper portion.

Hang flexible coupling assembling and include two dead levers, two movable rods, two ring chains and a connecting rod, two dead lever front ends stretch into in the housing and with housing fixed connection, interval arrangement about two dead levers, two dead lever rear ends are articulated with a movable rod lower extreme respectively, the connecting rod sets up along controlling the direction, two ring chain lower extremes are connected at the housing top, interval arrangement about two ring chains, two movable rod upper ends are articulated with the rear side at both ends about the connecting rod respectively, two ring chain upper ends are articulated with the front side at both ends about the connecting rod respectively, the connecting rod adopts the rectangle steel pipe to make, the side is equipped with the backing plate respectively around the connecting rod middle part, penetrating connecting hole around having seted up between two backing plates.

Adopt above-mentioned technical scheme, the utility model discloses a housing leading flank, trailing flank, left surface and right flank all are equipped with a rubber scraper, and the rubber scraper outside is passed through clamp plate and screw and is connected with the housing, and the side flushes with the universal wheel bottom under the rubber scraper. The sewage pumping port assemblies are arranged in two numbers, the two sewage pumping port assemblies are respectively located on the right side and the right front side of the top of the housing, each sewage pumping port assembly comprises a guide cylinder with a small upper part and a large lower part, a rectangular hole is formed in the top of the housing, the lower end of the guide cylinder covers the rectangular hole and is fixedly connected with the top of the housing, and a pipe joint is arranged at the upper port of the guide cylinder.

The connecting hole in the middle of the connecting rod of the suspension flexible connecting assembly is connected with a mechanical arm through a pin shaft, the mechanical arm drives four universal wheels of the whole cleaning device to roll on a channel side slope, and a pipe joint of the sewage pumping port assembly is connected with a sludge pipe and a sewage suction pump. When cleaning operation is carried out on the channel side slope, high-pressure water provides high-pressure water for all the rotary type cavitation water jet assemblies, the high-pressure water enters the rotary cylinder through the fixed cylinder and then enters the three spray pipes, and finally the high-pressure water is obliquely and downwards sprayed onto the surface of the channel side slope through the cavitation jet spray heads to remove algae and sludge on the channel side slope, gaps are formed between the lower edges of rubber scrapers arranged on the periphery of the housing and the surface of the channel side slope, the rubber scrapers basically seal the interior of the housing, and the algae-sludge mixture in the housing is outwards pumped out to the external algae-sludge separating device through the dirt pumping port assembly by the dirt suction pump so as to be dehydrated and separated. Meanwhile, the rubber scraper can scrape and gather algae mud mixture which is cleared away by jet flow on the channel side slope in the moving process, so that the sewage suction efficiency of the sewage suction pump can be further improved.

When the three cavitation jet nozzles are installed at the end parts of the spray pipes, the three cavitation jet nozzles are inclined downwards by a certain angle along the direction of a rotary axis, the sizes of the three cavitation jet nozzles are equal, the directions of the three cavitation jet nozzles are consistent, and when high-pressure water is sprayed from the cavitation jet nozzles, the arrangement mode can generate a certain rotary driving moment, so that the spray pipes and the cavitation jet nozzles rotate at a high speed, the coverage area is improved, and the cleaning efficiency is also improved.

When the rotary cylinder rotates in the fixed cylinder, the rotary cylinder rotates more flexibly due to the arrangement of the two ceramic bearings, has good corrosion resistance and is suitable for underwater work. The annular spigot structure arranged between the upper end of the rotary cylinder and the inner side of the upper end of the stepped mounting groove has a good sealing effect, and prevents high-pressure water from entering the stepped mounting groove to influence water pressure. The spacing ring plays the effect of injecing rotatory section of thick bamboo axial position, avoids rotatory section of thick bamboo to break away from the fixed cylinder. The positioning clamping piece has the same structure as the clamping piece in the patent number zl201910815723.x, and is not described in detail here. The distance between the cavitation jet nozzle and the surface of the side slope of the channel to be treated is adjusted by adjusting the position of the positioning clamping piece for clamping the excircle of the fixed cylinder, so that the adaptability of the underwater cavitation jet cleaning device to various working conditions is improved. The bearing gland serves to define the axial position of the ceramic bearing. In order to improve the reliability of the threaded connection of the spray pipe and the rotary cylinder, a fastening nut for pressing the outer surface of the rotary cylinder can be further connected to the spray pipe in a threaded mode.

The hanging flexible connecting assembly is simple in structure, and the mechanical arm does not need to press the cleaning device onto the channel slope downwards and directly moves along the channel slope by the gravity of the cleaning device. The mode that the circular chain is combined with the movable rod is adopted, so that the connecting rod can swing back and forth, and the mechanical arm is prevented from generating downward pressure on the whole cleaning device.

The housing is not provided with the small water-permeable holes, and clear water enters the housing only through the gap between the lower side edge of the rubber scraper and the channel side slope, so that the dirt absorbing effect can be improved.

Interval arrangement about a plurality of rotation type cavitation water jet components follow the straight line can be the rectangle with the housing preparation like this, and manufacturing process is simpler, because the equal downward sloping setting of jet direction of cavitation jet nozzle has the clearance between the spray tube of two adjacent rotation type cavitation water jet components like this, and cavitation jet nozzle also can be in the comprehensive jet flow of left right direction cover algae mud.

The structure of the dirt pumping port assembly enables the suction port to be enlarged, the area of the chain in the housing is enlarged, and the suction efficiency is improved.

To sum up, the utility model relates to a rationally, simple structure, easily manufacturing, with low costs, efflux area of coverage big, improvement are longer to the clean efficiency of channel side slope, the life of each part, and clean effect also strengthens greatly.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a bottom view of the present invention;

FIG. 3 is a perspective view of a rotary cavitation water jet assembly of the present invention;

fig. 4 is an axial cross-sectional view of a rotating cavitation water jet assembly.

Detailed Description

As shown in figures 1-4, the utility model discloses a novel cavitation jet cleaning trolley for side slope algae removal, which comprises a casing 1 (a section steel frame is arranged inside the casing 1) which is rectangular as a whole and is open at the bottom, the length direction of the casing 1 is arranged along the left and right directions, four corners at the top of the casing 1 are respectively provided with a mounting seat 2, each mounting seat 2 is provided with a universal wheel 3, the lowest part of the universal wheel 3 is lower than the lower side of the casing 1, a hanging flexible connecting component is arranged on the casing 1, a plurality of rotary cavitation water jet components are uniformly arranged at intervals along the left and right directions in the middle of the casing 1, the centers of all the rotary cavitation water jet components are positioned on a straight line along the left and right directions, and high-pressure water source supplied from outside is uniformly distributed to each rotary cavitation water jet component through a distribution valve and a high-pressure water pipe which are arranged above the casing 1, a sewage pumping port component is arranged at the side edge of the top of the housing 1.

The front side surface, the rear side surface, the left side surface and the right side surface of the housing 1 are respectively provided with a rubber scraper 21, the outer side of the rubber scraper 21 is connected with the housing 1 through a pressing plate 22 and a screw, and the lower side edge of the rubber scraper 21 is flush with the bottom of the universal wheel 3.

The two sewage pumping port assemblies are respectively positioned on the right side and the right front side of the top of the housing 1, each sewage pumping port assembly comprises a guide cylinder 23 which is small at the top and big at the bottom, a rectangular hole is formed in the top of the housing 1, the lower end of the guide cylinder 23 covers the rectangular hole and is fixedly connected with the top of the housing 1, and a pipe joint 24 is arranged at the upper port of the guide cylinder 23.

The rotary type cavitation water jet assembly comprises a positioning clamping piece 4, a high-pressure rotary joint 5, spray pipes 6 and cavitation jet nozzles 7, the top of a housing 1 is provided with a mounting hole, the high-pressure rotary joint 5 comprises a cylindrical fixed cylinder 8 and a rotary cylinder 9 arranged in the fixed cylinder 8, the fixed cylinder 8 is vertically assembled in the mounting hole, the positioning clamping piece 4 is sleeved on the excircle of the fixed cylinder 8 and clamps the fixed cylinder 8 tightly, the positioning clamping piece 4 is arranged on the top of the housing 1 and is connected with the housing 1 through a bolt, the inner circle of the upper end of the fixed cylinder 8 is provided with an inner thread for connecting a high-pressure water pipe, the part of the lower end of the rotary cylinder 9 extending out of the fixed cylinder 8 is of a hexagonal prism structure, the lower end of the rotary cylinder 9 is in threaded connection with a plug 10, the three spray pipes 6 are arranged at the lower side part of the rotary cylinder 9 in a threaded connection mode and are evenly distributed along the circumferential direction of the central line of the rotary cylinder 9, the outer end of each spray pipe 6 is connected with one cavitation jet nozzle 7, the spraying directions of the three cavitation jet nozzles 7 are all arranged in a downward inclined mode, and the spraying directions of the cavitation jet nozzles 7 are equal to the included angle of the spray pipe 6 in size and consistent in direction.

The open stepped mounting groove of lower extreme has been seted up to circle lower part in the solid fixed cylinder 8, the upper end of the rotatory section of thick bamboo 9 stretches into in the stepped mounting groove with the axial, be equipped with annular tang structure 11 between the upper end of the rotatory section of thick bamboo 9 and the inboard of stepped mounting groove upper end, rotate through ceramic bearing 12 of two upper and lower interval arrangements between the excircle of the rotatory section of thick bamboo 9 and the interior circle of stepped mounting groove and be connected, be equipped with the position sleeve 25 of cover on the rotatory section of thick bamboo 9 between two ceramic bearing 12, the solid fixed cylinder 8 lower extreme is equipped with bearing cover 13, bearing cover 13 upper portion threaded connection is at the port under the stepped mounting groove and with the ceramic bearing 12 outer lane crimping of lower part, bearing cover 13 lower part inner circle and rotatory section of thick bamboo 9 clearance fit, position sleeve 25 upper end and lower extreme contact with ceramic bearing 12 on upper portion and the ceramic bearing 12 inner circles of lower part respectively, the outer tip of the rotatory section of thick bamboo 9 is equipped with spacing ring 14, spacing ring 14 lower extreme contacts with the ceramic bearing 12 upper end on upper portion.

Hang flexible coupling assembling and include two dead levers 16, two movable rods 17, two ring chains 18 and a connecting rod 19, two dead lever 16 front ends stretch into in the housing 1 and with housing 1 fixed connection, interval arrangement about two dead levers 16, two dead lever 16 rear ends are articulated with a movable rod 17 lower extreme respectively, connecting rod 19 sets up along controlling the direction, two ring chains 18 lower extreme are connected at housing 1 top, interval arrangement about two ring chains 18, two movable rod 17 upper ends are articulated with the rear side at both ends about connecting rod 19 respectively, two ring chains 18 upper ends are articulated with the front side at both ends about connecting rod 19 respectively, connecting rod 19 adopts the rectangle steel pipe to make, connecting rod 19 middle part front and back side is equipped with backing plate 20 respectively, the penetrating connecting hole of front and back has been seted up between two backing plates 20.

The connecting hole in the middle of the connecting rod 19 for hanging the flexible connecting assembly is connected with a mechanical arm through a pin shaft, the mechanical arm drives four universal wheels 3 of the whole cleaning device to roll on a channel side slope, and a pipe joint 24 of the sewage pumping port assembly is connected with a sludge pipe and a sewage suction pump. When cleaning operation is carried out on the channel side slope, high-pressure water provides high-pressure water for all the rotary type cavitation water jet assemblies, the high-pressure water enters the rotary cylinder 9 through the fixed cylinder 8 and then enters the three spray pipes 6, and finally, the high-pressure water is obliquely and downwards sprayed to the surface of the channel side slope through the cavitation jet spray head 7, algae and sludge on the channel side slope are removed, gaps are reserved between the lower edge of a rubber scraper 21 arranged on the periphery of the housing 1 and the surface of the channel side slope, the rubber scraper 21 basically seals the inside of the housing 1, and a sewage suction pump outwards pumps algae-sludge mixture in the housing 1 to an external algae-sludge separating device through a sewage pumping port assembly so as to carry out dehydration separation.

When the three cavitation jet nozzles 7 are installed at the end part of the spray pipe 6, the three cavitation jet nozzles are inclined downwards at a certain angle along the direction of a rotary axis, the sizes of the three cavitation jet nozzles are equal, the directions of the three cavitation jet nozzles are consistent, and when high-pressure water is sprayed from the cavitation jet nozzles 7, the arrangement mode can generate certain rotary driving torque, so that the spray pipe 6 and the cavitation jet nozzles 7 rotate at high speed, the coverage area is improved, and the cleaning efficiency is also improved.

When the rotary cylinder 9 rotates in the fixed cylinder 8, the rotation is more flexible due to the arrangement of the two ceramic bearings 12, and the rotary cylinder has good corrosion resistance and is suitable for underwater work. The annular spigot structure 11 arranged between the upper end of the rotary drum 9 and the inner side of the upper end of the stepped mounting groove has a good sealing effect, and prevents high-pressure water from entering the stepped mounting groove to influence water pressure. The stop ring 14 serves to limit the axial position of the rotary cylinder 9 and prevent the rotary cylinder 9 from being separated from the fixed cylinder 8. The positioning clamp 4 has the same structure as the clamp in patent No. zl201910815723.x, and is not described in detail here. The circle all sets up annular antiskid friction line 15 in location holder 4 excircle and solid fixed cylinder 8, and this can improve the clamp force to solid fixed cylinder 8, prevents solid fixed cylinder 8 downstream. The distance between the cavitation jet nozzle 7 and the surface of the side slope of the channel to be treated is adjusted by adjusting the position of the positioning clamping piece 4 for clamping the excircle of the fixed cylinder 8, so that the adaptability of the underwater cavitation jet cleaning device to various working conditions is improved. The bearing gland 13 serves to define the axial position of the ceramic bearing 12. In order to improve the reliability of the threaded connection of the nozzle 6 and the rotary cylinder 9, a fastening nut for pressing the outer surface of the rotary cylinder 9 can be further screwed on the nozzle 6.

The hanging flexible connecting assembly is simple in structure, and the mechanical arm does not need to press the cleaning device onto the channel slope downwards and directly moves along the channel slope by the gravity of the cleaning device. The link rod 19 can be swung back and forth by the combination of the link chain 18 and the movable rod 17 to prevent the arm from exerting downward pressure on the entire cleaning apparatus.

The housing 1 is not provided with the small water-permeable holes, and clear water enters the housing 1 only through the gap between the lower side edge of the rubber scraper 21 and the channel side slope, so that the dirt absorbing effect can be improved.

A plurality of rotation type cavitation water jet assemblies are along the interval arrangement about the straight line, can be the rectangle with housing 1 preparation like this, and manufacturing process is simpler, because the equal downward sloping setting of jet direction of cavitation jet shower nozzle 7 has the clearance between two adjacent rotation type cavitation water jet assembly's the spray tube 6 like this, and cavitation jet shower nozzle 7 also can be in the comprehensive efflux of left right direction and cover the algae mud.

The above description is only a preferred embodiment of the present invention, and the arrangement position and the corresponding direction of each component described in the present embodiment are only convenient for those skilled in the art to understand the technical solution, and are not used to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it can still modify the technical solution described in the foregoing embodiments, or make equivalent replacement for some technical features thereof, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a slope removes algae and uses novel cavitation jet cleaning trolley which characterized in that: including wholly being rectangle and the open housing in bottom, the length direction of housing sets up along left right direction, four angles at housing top are equipped with a mount pad respectively, every mount pad all is equipped with a universal wheel, the lower side that the lower part of universal wheel is less than the housing, be equipped with on the housing and hang flexible coupling assembling, the housing middle part is equipped with a plurality of rotation type cavitation water jet subassembly along the even interval of left right direction, the center of all rotation type cavitation water jet subassemblies is located along a straight line of left right direction, the high pressure water source of outside supply is through setting up distribution valve and high pressure water pipe evenly distributed to every rotation type cavitation water jet subassembly in housing top, housing top side department is equipped with takes out dirty mouthful subassembly.

2. The novel cavitation jet cleaning trolley for slope algae removal as claimed in claim 1, wherein: the rotary type cavitation water jet assembly comprises a positioning clamping piece, a high-pressure rotary joint, spray pipes and cavitation jet nozzles, wherein the top of the housing is provided with a mounting hole, the high-pressure rotary joint comprises a cylindrical fixed cylinder and a rotary cylinder arranged in the fixed cylinder, the fixed cylinder is vertically assembled in the mounting hole, the positioning clamping piece is sleeved on the excircle of the fixed cylinder and clamps the fixed cylinder tightly, the positioning clamping piece is arranged at the top of the housing and is connected with the housing through bolts, the inner circle of the upper port of the fixed cylinder is provided with an inner thread for connecting a high-pressure water pipe, the part of the lower end of the rotary cylinder, which extends out of the fixed cylinder, is of a hexagonal prism structure, the lower port of the rotary cylinder is in threaded connection with a plug, the spray pipes are provided with three, the inner ends of the three spray pipes are in threaded connection with the lower side part of the rotary cylinder and are uniformly arranged along the circumferential direction of the central line of the rotary cylinder, the outer end of each spray pipe is connected with one cavitation jet nozzle, and the three cavitation jet nozzles are all arranged in a downward inclination manner, the jet direction of the cavitation jet nozzle is equal to the included angle of the jet pipe and is consistent with the direction of the jet pipe.

3. The novel cavitation jet cleaning trolley for slope algae removal as claimed in claim 2, wherein: the open stepped mounting groove of lower extreme has been seted up to circle lower part in the solid fixed cylinder, the rotatory section of thick bamboo upper end stretches into in the stepped mounting groove with the axial, be equipped with annular tang structure between rotatory section of thick bamboo upper end and the stepped mounting groove upper end inboard, the ceramic bearing through two upper and lower interval arrangement between the circle in rotatory section of thick bamboo excircle and the stepped mounting groove rotates and is connected, be equipped with the position sleeve of cover on the rotatory section of thick bamboo between two ceramic bearings, the solid fixed cylinder lower extreme is equipped with the bearing gland, bearing gland upper portion threaded connection under the stepped mounting groove port and with the ceramic bearing outer lane crimping of lower part, circle and rotatory section of thick bamboo clearance fit in the bearing gland lower part, position sleeve upper end and lower extreme contact with the ceramic bearing inner race on upper portion and lower part respectively, the tip is equipped with the spacing ring on the rotatory section of thick bamboo excircle, the spacing ring lower extreme contacts with the ceramic bearing upper end on upper portion.

4. The novel cavitation jet cleaning trolley for slope algae removal as claimed in claim 2 or 3, wherein: hang flexible coupling assembling and include two dead levers, two movable rods, two ring chains and a connecting rod, two dead lever front ends stretch into in the housing and with housing fixed connection, interval arrangement about two dead levers, two dead lever rear ends are articulated with a movable rod lower extreme respectively, the connecting rod sets up along controlling the direction, two ring chain lower extremes are connected at the housing top, interval arrangement about two ring chains, two movable rod upper ends are articulated with the rear side at both ends about the connecting rod respectively, two ring chain upper ends are articulated with the front side at both ends about the connecting rod respectively, the connecting rod adopts the rectangle steel pipe to make, the side is equipped with the backing plate respectively around the connecting rod middle part, penetrating connecting hole around having seted up between two backing plates.