CN117005521B

CN117005521B - Afforestation drainage structures

Info

Publication number: CN117005521B
Application number: CN202311278698.9A
Authority: CN
Inventors: 冯幼艳; 李齐
Original assignee: Linyi Garden Sanitation Support Service Center
Current assignee: Linyi Garden Sanitation Support Service Center
Priority date: 2023-10-07
Filing date: 2023-10-07
Publication date: 2024-01-12
Anticipated expiration: 2043-10-07
Also published as: CN117005521A

Abstract

The invention discloses a landscaping drainage structure, which belongs to the field of landscaping drainage and comprises a shell, wherein a U-shaped groove is formed in the inner wall of the shell, a guide hole is formed in the rear side of the inner part of the U-shaped groove, a plurality of blocking columns which are distributed at equal intervals are fixedly connected in the shell, and a cutting mechanism is arranged in the shell; the cutting mechanism is used for cleaning the inside of the shell and scraping attachments on the inner wall of the shell; the cutting mechanism comprises an accommodating shell which is connected inside the U-shaped groove in a sliding manner, the accommodating shell can be moved, the inner wall of the U-shaped groove can be scratched while the inner part of the outer shell moves, attachments on the inner wall of the U-shaped groove are scraped, and branches or other falling objects in the outer shell can be moved together by the movement of the accommodating shell, so that the objects can be taken out from the positions of the cleaning openings of the device, and the attachments on the inner wall of the U-shaped groove are cleaned more conveniently by the inner wall of the opening of the accommodating shell.

Description

Afforestation drainage structures

Technical Field

The invention relates to the field of garden drainage, in particular to a garden greening drainage structure.

Background

The garden water supply and drainage and sewage treatment engineering is one of important components in the garden engineering, and the requirements of people on water quantity, water quality and water pressure must be met. The water can be polluted in the use process, the perfect water supply and drainage engineering and the sewage treatment engineering have very important effects on garden construction and environmental protection, a linear drainage groove is used in gardens, the main effect of the linear drainage groove is to convey and discharge water, inspection staff can use a leakage net to drag out the water from a cleaning port under the condition that more sundries are found in the inspection process, and the state of no sundries in the ditch can be kept all the time.

The landscaping drainage structure is inconvenient to adjust the quantity of the water outlet according to the water flow quantity, so that soil loss is caused, and the landscaping growth is affected.

The chinese patent of the bulletin number CN219569129U of authorizing discloses a afforestation drainage structure, and the inside board that opens and shuts of portable groove that the link surface was seted up moves, and then rotates the spout that the slider of opening board upper end welded was seted up on the link surface to open partial outlet, drain away a small amount of rainwater, remaining rainwater is used for watering afforestation, and when precipitation is high in addition, open three groups driving motor, thereby open all outlet that the drain bar surface was seted up, and then increase drainage efficiency, reduce ponding phenomenon.

The Chinese patent with the bulletin number of CN210737486U is granted to disclose an afforestation drainage structure, and the staff can prevent that silt from flowing into the filtration basin and blocking up the filter to the staff takes out the filter and takes out the filtration stone together simultaneously, makes things convenient for the staff to operate and use and improves work efficiency.

According to the first method, when precipitation is high, the three groups of driving motors are opened, so that all water outlets formed in the surface of the water discharge plate are opened, the water discharge efficiency is increased, and the water accumulation phenomenon is reduced.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide an afforestation drainage structure, which can scrape the inner wall of a U-shaped groove while moving the inside of a shell by moving a containing shell, scrape attachments on the inner wall of the U-shaped groove, and move the containing shell together with branches or other falling objects in the shell, so that the positions reach the cleaning opening of the device to take out the materials, and the inner wall of the opening of the containing shell is more convenient for cleaning the attachments on the inner wall of the U-shaped groove.

In order to solve the problems, the invention adopts the following technical scheme.

The utility model provides a afforestation drainage structures, includes the shell, U-shaped groove has been seted up to the inner wall of shell, the guiding hole has been seted up to the inside rear side in U-shaped groove, the inside fixedly connected with of shell is a plurality of blocking posts that are equidistant distribution, the inside of shell is provided with excision mechanism;

the cutting mechanism is used for cleaning the inside of the shell and scraping attachments on the inner wall of the shell;

the cutting mechanism comprises an accommodating shell which is connected inside the U-shaped groove in a sliding mode, the upper half portion of the cross section of the accommodating shell is rectangular, the cross section of the lower half portion of the cross section of the accommodating shell is semicircular, the outer surface of the accommodating shell is attached to the inner wall of the U-shaped groove, the right side of the accommodating shell is provided with an opening, and the surface of the guide hole is fixedly connected with a filter plate.

Further, a blocking plate is arranged at the top of the shell, and two groups of moving parts are arranged between the blocking plate and the accommodating shell.

Further, the moving piece comprises a first limiting block fixed with the bottom of the blocking plate, the top of the accommodating shell is fixedly connected with a second limiting block, a first limiting rod is movably connected between the first limiting block and the second limiting block, a torsion spring is welded between the second limiting block and the first limiting rod, and the first limiting rod is rotationally connected with the second limiting block.

Further, the first limiting block extends to the direction of the first limiting rod to form a sliding block, and the sliding block is connected to the inner portion of the first limiting rod in a sliding mode.

Further, the inside sliding connection of first restriction pole has the piece of stretching into, the bottom welding that stretches into the piece has first spring, the last half that stretches into the piece is right triangle.

Further, the right side of holding the shell is provided with the cutting member, the cutting member is including sliding connection in the semi-annular piece that holds the shell right side, the right side fixedly connected with first cutting knife of semi-annular piece.

Further, the cross section shape of the first cutting knife is an acute triangle, when the first cutting knife moves, the first cutting knife extends towards the direction of the U-shaped groove to form a second cutting knife, and the front side port of the semi-annular block extends towards the rear side to form a connecting rod.

Further, the top of connecting rod is provided with the driving piece, the driving piece include with connecting rod left side fixed connection's cylinder, the cylinder rotates with hold the shell and is connected, be connected with between cylinder and the hold shell and be used for reset spring, the top of connecting rod is in the rear side of cylinder and is provided with the actuating lever.

Further, the actuating lever is with hold shell sliding connection, the bottom of actuating lever is laminated mutually with the top of connecting rod, the upper half of actuating lever is isosceles triangle, hold the inside extension that the shell was to the actuating lever and form first extension piece, the removal groove has been seted up to the inside of actuating lever, the inside welding in removal groove has the second spring, first extension piece extrudees the second spring.

Further, blocking posts are arranged between every two of the two blocks, each blocking mechanism comprises a mounting plate fixedly connected with the inner walls of two sides of the opening of the shell, a plurality of second limiting rods which are distributed at equal intervals are fixedly connected to the surface of each mounting plate, each second limiting rod is formed by splicing an upper half cuboid with an irregular body with an arc-shaped cross section of a lower half, and the lower half of each second limiting rod extends upwards to form a second extending block.

Compared with the prior art, the invention has the beneficial effects that:

1. this scheme is through removing the containment shell, can scrape the inner wall of U-shaped groove when the inside of shell removes, scrape the attachment of U-shaped groove inner wall down, and the removal that holds the shell can be carried branch or other thing that drops in the shell and remove together, make the position that these positions reach the clearance mouth of device take out these substances, it is more convenient to hold the inner wall of shell opening part to the clearance of U-shaped groove inner wall attachment, and it can be with the inside of holding the shell to hold shell right side opening, effectively prevent that these substances from missing, stop through the filter plate, prevent that leaf, branch or other positions from reaching other pipelines through the guiding hole, cause the jam of pipeline, the filter plate is parallel and level mutually with the U-shaped groove, at the surface clearance that holds the shell and remove the in-process, make the filter plate can use for a long time can not block up.

2. According to the scheme, the blocking column is extruded to one of the first limiting rods, the first limiting rod rotates around the second limiting block, the first limiting block and the first limiting rod are conveniently opened, the blocking column passes through the first limiting rod to reach the lower portion of the blocking plate, then the blocking plate is moved again, the blocking column does not extrude the first limiting rod, the first limiting rod returns to the original position under the action of the torsion spring, the moving part passes through the blocking column, and the moving part is conveniently moved in the U-shaped groove with the accommodating shell without being influenced by the blocking column.

3. According to the scheme, when the first limiting rod is located below the first limiting block, the extending block is clamped into the first limiting block, positioning of the first limiting rod is achieved, the first limiting rod is not extruded by the blocking column under limiting of the sliding block and limiting of the first limiting rod, the first limiting rod is always fixed with the first limiting block, the accommodating shell can conveniently move in the U-shaped groove, after the blocking column extrudes the first limiting rod, the first limiting rod is separated from the first limiting block, the accommodating shell is more convenient to clean the U-shaped groove, and difficulty in cleaning the U-shaped groove due to the fact that the outer shell is of an integral structure is avoided.

4. This scheme is through when first cutting knife removes, and the acute angle department of first cutting knife cuts the attachment of U-shaped groove inner wall, and the attachment after the cutting is scraped by holding shell and semi-annular piece more easily to the attachment after the cutting is a plurality of fritters, more conveniently holds the shell and promotes the attachment removal, first cutting knife extends the direction in U-shaped groove and forms the second cutting knife, at the removal in-process of semi-annular piece, the second cutting knife cuts the attachment annular, cuts the attachment again, and is more convenient to clearance and transportation of attachment, the front side port department of semi-annular piece extends to the rear side and forms the connecting rod.

5. This scheme is through holding the shell and is carrying the actuating lever when blocking the post, blocks the post and extrudees the inclined part of actuating lever, and the actuating lever receives the extrusion and is in holding the inside slip of shell, makes the actuating lever slip more convenient, and the restriction to first extension piece through the movable groove makes the actuating lever remove more conveniently in holding the inside of shell, after the removal of first extension piece, makes the second spring change from originally natural extension state into tight state, makes things convenient for the actuating lever to get back to original position under the effect of second spring, makes the cutting member can repeatedly cut the inside attachment of U-shaped groove in the inside of U-shaped groove, and is more convenient to the clearance of attachment.

6. According to the scheme, the object falling is clamped on the upper surface of the second limiting rod through the lower half portion limitation of the second extending block, the second limiting rod is provided with a plurality of limiting rods, the effect of preventing substances such as mobile phones from falling into the shell is better, the lower half portion of the second limiting rod extends upwards to form the second extending block, and the second limiting rod has better blocking effect on substances such as branches, leaves and keys through the blocking of the second extending block.

Drawings

FIG. 1 is a schematic view of a drainage device according to the present invention;

FIG. 2 is a schematic view of the internal structure of the drainage device of the present invention;

FIG. 3 is a schematic view of a blocking mechanism according to the present invention;

FIG. 4 is a schematic view of the structure of the cutting mechanism of the present invention;

FIG. 5 is a side view of the cutting mechanism of the present invention;

FIG. 6 is a schematic view of a first cutter according to the present invention;

FIG. 7 is a schematic view of a moving member according to the present invention;

fig. 8 is a schematic structural view of a driving member according to the present invention.

The reference numerals in the figures illustrate:

1. a housing; 11. a U-shaped groove; 12. a blocking column; 13. a guide hole; 14. a filter plate; 2. a cutting mechanism; 21. a blocking plate; 22. a housing case; 23. a moving member; 231. a first limiting block; 232. a first restriction lever; 233. a second limiting block; 234. a torsion spring; 235. a protruding block; 236. a first spring; 237. a slide block; 24. a driving member; 241. a driving rod; 242. a cylinder; 243. a first extension block; 244. a second spring; 245. a moving groove; 25. a cutting member; 251. a first cutter; 252. a connecting rod; 253. a semi-annular block; 254. a second cutter; 3. a blocking mechanism; 31. a mounting plate; 32. a second restriction lever; 33. and a second extension block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present invention are within the protection scope of the present invention.

Referring to fig. 1 to 2 and 4 to 5, an afforestation drainage structure, including a housing 1, a U-shaped groove 11 is provided on an inner wall of the housing 1, water flows to a top of the housing 1 from the top of the housing 1 to an inside of the U-shaped groove 11 through an outside water flow, a guide hole 13 is provided on an inside rear side of the U-shaped groove 11, water is made to reach other positions through the guide hole 13 by connecting other pipes with the guide hole 13, a plurality of blocking posts 12 distributed at equal intervals are fixedly connected to an inside of the housing 1, an opening of the housing 1 is connected through the blocking posts 12 to prevent deformation of the opening of the housing 1 and prevent a strip-shaped object from falling to the inside of the housing 1, a cutting mechanism 2 is provided inside the housing 1, the cutting mechanism 2 includes a housing 22 slidably connected to the inside of the U-shaped groove 11, an upper half portion of a cross section of the housing 22 is rectangular, and a lower half section is semicircular, the outer surface of the accommodating shell 22 is attached to the inner wall of the U-shaped groove 11, the inner wall of the U-shaped groove 11 can be scratched while the inner part of the shell 1 moves by moving the accommodating shell 22, attachments on the inner wall of the U-shaped groove 11 can be scraped, the moving of the accommodating shell 22 can move together with branches or other falling objects in the shell 1, the positions of the branches or other falling objects reach the cleaning port of the device to take out the objects, the right side opening of the accommodating shell 22 is formed, the inner wall at the opening of the accommodating shell 22 is more convenient for cleaning attachments on the inner wall of the U-shaped groove 11 in the rightward moving process of the accommodating shell 22 through the right side opening of the accommodating shell 22, the cleaned objects can be stored in the accommodating shell 22, the objects are effectively prevented from being missed, the surface of the guide hole 13 is fixedly connected with the filter plate 14, the filter plate 14 is blocked by the filter plate 14, the filter plate 14 is flush with the U-shaped groove 11, and the surface of the filter plate 14 can be cleaned in the moving process of the accommodating shell 22, so that the filter plate 14 can be used for a long time without being blocked.

As shown in fig. 1 to 2 and 4 to 5 and 7, the top of the housing 1 is provided with a blocking plate 21, two sets of moving members 23 are provided between the blocking plate 21 and the receiving case 22, the blocking plate 21 moves inside the housing 1 with the moving members 23 by moving the blocking plate 21, while the moving members 23 are connected with the receiving case 22, the receiving case 22 moves inside the housing 1 with the moving members 23 by moving the receiving case 22, the moving members 23 include a first limiting block 231 fixed with the bottom of the blocking plate 21, a second limiting block 233 is fixedly connected with the top of the receiving case 22, a first limiting lever 232 is movably connected between the first limiting block 231 and the second limiting block 233, a torsion spring 234 is welded between the second limiting block 233 and the first limiting lever 232 when the first limiting lever 232 passes through the blocking post 12 when the receiving case 22 is moved, the first limiting lever 232 is rotatably connected with the second limiting block 233, first, the blocking column 12 presses one of the first limiting rods 232, so that the first limiting rod 232 rotates around the second limiting block 233, the first limiting block 231 and the first limiting rod 232 are conveniently opened, the blocking column 12 passes through the first limiting rod 232 to reach the lower part of the blocking plate 21, then the blocking plate 21 is moved again, the blocking column 12 does not press the first limiting rod 232 any more, the first limiting rod 232 returns to the original position under the action of the torsion spring 234, the first limiting block 231 extends towards the first limiting rod 232 to form a sliding block 237, the sliding block 237 is slidably connected inside the first limiting rod 232, the sliding block 237 rotates back to the original position through the first limiting rod 232, the upper and lower fixing between the first limiting rod 232 and the first limiting block 231 is achieved, the moving blocking column 12 presses the other first limiting rod 232 again, the blocking post 12 passes through the second first limiting rod 232, so that the moving member 23 passes through one blocking post 12, and the moving member 23 can conveniently move inside the U-shaped groove 11 with the accommodating shell 22 without being influenced by the blocking post 12.

As shown in fig. 1 to 2 and fig. 4 to 5 and fig. 7, the inside sliding connection of the first limiting rod 232 has the extension block 235, limit the extension block 235 through the first limiting rod 232, make the upper half of extension block 235 can upwards move under the effect of first spring 236, thereby break away from the inside card of first limiting rod 232 and go into the inside of first limiting block 231, the bottom welding of extension block 235 has first spring 236, the upper half of extension block 235 is right triangle-angled triangle, when first limiting rod 232 is in the below of first limiting block 231, the extension block 235 blocks into the inside of first limiting block 231, realize the location to first limiting rod 232, under the restriction of slider 237 and the restriction of first limiting rod 232, first limiting rod 232 is not pressed down by the extrusion of block post 12, first limiting rod 232 remains fixed with first limiting block 231 all the time, conveniently hold shell 22 can be at the inside removal of U-shaped groove 11 more convenient, after block post 12 extrudees first limiting rod 232, it is to keep away from first limiting rod 232 and first limiting rod 231 to the inside of U-shaped groove 11, the clearance is more convenient for the clearance to the U-shaped groove 11 because of the inside clearance is difficult to the whole to be kept for the shell 11.

As shown in fig. 2 and fig. 4 to 6, the right side of the accommodating case 22 is provided with the cutting member 25, the cutting member 25 includes the semi-annular block 253 slidingly connected to the right side of the accommodating case 22, the semi-annular block 253 is moved by the movement of the accommodating case 22, the right side of the semi-annular block 253 is fixedly connected with the first cutting knife 251, and the first cutting knife 251 is attached to the U-shaped groove 11, the semi-annular block 253 is moved by the first cutting knife 251 on the inner wall surface of the U-shaped groove 11, the cross section of the first cutting knife 251 is in an acute angle triangle shape, when the first cutting knife 251 is moved, the cut attachments are more easily scraped by the accommodating case 22 and the semi-annular block 253, and the cut attachments are a plurality of small blocks, so that the accommodating case 22 is more convenient to push the attachments to move, the second cutting knife 254 extends towards the direction of the U-shaped groove 11 to form the second cutting knife 254, the second cutting knife 254 is used for annular cutting the attachments, the attachments are cut again, the attachments are more convenient to clean and the attachments are more convenient to transport, and the front side port of the semi-annular block 253 extends backwards.

As shown in fig. 2 and 4 to 6 and 8, the top of the connecting rod 252 is provided with a driving member 24, the driving member 24 comprises a cylinder 242 fixedly connected with the left side of the connecting rod 252, the cylinder 242 can be rotated in the accommodating shell 22 through the rotation of the semi-annular block 253, the cylinder 242 is rotationally connected with the accommodating shell 22, a return spring is connected between the cylinder 242 and the accommodating shell 22, when the semi-annular block 253 rotates, the semi-annular block 253 returns to the original position under the action of the return spring connected with the accommodating shell 22, the top of the connecting rod 252 is provided with a driving rod 241 at the rear side of the cylinder 242, the driving rod 241 is slidably connected with the accommodating shell 22, the bottom of the driving rod 241 is attached to the top of the connecting rod 252, the connecting rod 252 can be extruded through the downward movement of the driving rod 241, the connecting rod 252 is extruded to rotate around the cylinder 242, the connecting rod 252 is more conveniently rotated through the semi-annular block 253, the upper half part of the driving rod 241 is isosceles triangle, when the driving rod 241 passes through the blocking column 12 by the accommodating shell 22, the blocking column 12 presses the inclined part of the driving rod 241, the driving rod 241 is pressed to slide in the accommodating shell 22, so that the driving rod 241 slides more conveniently, the accommodating shell 22 extends to the inside of the driving rod 241 to form a first extending block 243, a moving groove 245 is formed in the inside of the driving rod 241, the driving rod 241 moves more conveniently in the accommodating shell 22 by limiting the first extending block 243 by the moving groove 245, a second spring 244 is welded in the moving groove 245, after the first extending block 243 moves, the first extending block 243 presses the second spring 244, so that the second spring 244 is converted into a tight state from an original natural extending state, the driving rod 241 returns to the original position conveniently under the action of the second spring 244, the cutting member 25 can repeatedly cut the attachments in the U-shaped groove 11, and the attachments are more convenient to clean.

As shown in fig. 1 to 3, the blocking posts 12 are provided with blocking mechanisms 3 between every two, each blocking mechanism 3 comprises a mounting plate 31 fixedly connected with inner walls of two sides of an opening of the casing 1, a plurality of second limiting rods 32 distributed at equal intervals are fixedly connected to the surface of the mounting plate 31, the second limiting rods 32 are formed by splicing irregular bodies with arc-shaped cross sections of the upper half parts and the lower half parts, the falling objects are limited by the lower half parts of the second extending blocks 33, the falling objects are clamped on the upper surfaces of the second limiting rods 32, the second limiting rods 32 are provided with a plurality of limiting rods, the effect of preventing the falling of the objects such as mobile phones into the casing 1 is better, the lower half parts of the second limiting rods 32 extend upwards to form second extending blocks 33, and the blocking effect of the second limiting rods 32 on the objects such as branches, leaves and keys is better through the blocking of the second extending blocks 33.

The using method comprises the following steps: through setting up second restriction pole 32 in the inside of shell 1, make the material that falls into U-shaped groove 11 receive the barrier of second restriction pole 32 for the dropping of restriction object, when the material in the U-shaped groove 11 of want clearance, through removing barrier 21, barrier 21 carries accommodation shell 22 in the inside removal of U-shaped groove 11, semi-annular piece 253 and the lateral wall of accommodation shell 22 scratch the inner surface of shell 1, the attachment of first cutting knife 251 to shell 1 inner wall is cut, when the actuating lever 241 passes through blocking post 12, actuating lever 241 receives blocking post 12 extrusion and moves downwards, actuating lever 241 extrudees connecting rod 252, make semi-annular piece 253 rotation, semi-annular piece 253 carries first cutting knife 251 and second cutting knife 254 rotation, the second cutting knife 254 of rotation is annular again cut the attachment.

The above is only a preferred embodiment of the present invention; the scope of the invention is not limited in this respect. Any person skilled in the art, within the technical scope of the present disclosure, may apply to the present invention, and the technical solution and the improvement thereof are all covered by the protection scope of the present invention.

Claims

1. The utility model provides a afforestation drainage structures, includes shell (1), U-shaped groove (11), its characterized in that have been seted up to the inner wall of shell (1): the rear side of the inside of the U-shaped groove (11) is provided with a guide hole (13), the inside of the shell (1) is fixedly connected with a plurality of blocking columns (12) which are distributed at equal intervals, and the inside of the shell (1) is provided with a cutting mechanism (2);

the cutting mechanism (2) is used for cleaning the inside of the shell (1) and scraping attachments on the inner wall of the shell (1);

the cutting mechanism (2) comprises a containing shell (22) which is connected inside the U-shaped groove (11) in a sliding mode, the upper half part of the cross section of the containing shell (22) is rectangular, the cross section of the lower half part of the cross section of the containing shell is semicircular, the outer surface of the containing shell (22) is attached to the inner wall of the U-shaped groove (11), the right side of the containing shell (22) is provided with an opening, and the surface of the guide hole (13) is fixedly connected with a filter plate (14);

a blocking plate (21) is arranged at the top of the shell (1), and two groups of moving parts (23) are arranged between the blocking plate (21) and the accommodating shell (22);

the movable piece (23) comprises a first limiting block (231) fixed with the bottom of the blocking plate (21), a second limiting block (233) is fixedly connected to the top of the accommodating shell (22), a first limiting rod (232) is movably connected between the first limiting block (231) and the second limiting block (233), a torsion spring (234) is welded between the second limiting block (233) and the first limiting rod (232), and the first limiting rod (232) is rotatably connected with the second limiting block (233);

the first limiting block (231) extends towards the first limiting rod (232) to form a sliding block (237), and the sliding block (237) is connected to the inside of the first limiting rod (232) in a sliding mode;

the inside sliding connection of the first limiting rod (232) is provided with an extending block (235), the extending block (235) is limited by the first limiting rod (232), the upper half part of the extending block (235) can move upwards under the action of a first spring (236), so that the inside of the extending block (232) is separated from the inside of the first limiting block (231), the bottom of the extending block (235) is welded with the first spring (236), the upper half part of the extending block (235) is in a right triangle shape, when the first limiting rod (232) is positioned below the first limiting block (231), the extending block (235) is clamped into the inside of the first limiting block (231), the positioning of the first limiting rod (232) is realized, the first limiting rod (232) is always kept fixed with the first limiting block (231) under the extrusion of a blocking column (12), and the first limiting rod (232) can be conveniently separated from the first limiting column (12) after the first limiting rod (231) is accommodated in the U-shaped groove (22);

the right side of the accommodating shell (22) is provided with a cutting piece (25), the cutting piece (25) comprises a semi-annular block (253) which is connected to the right side of the accommodating shell (22) in a sliding mode, and a first cutting knife (251) is fixedly connected to the right side of the semi-annular block (253);

the cross section of the first cutting knife (251) is in an acute triangle shape, when the first cutting knife (251) moves, the first cutting knife (251) extends towards the direction of the U-shaped groove (11) to form a second cutting knife (254), and the front side port of the semi-annular block (253) extends towards the rear side to form a connecting rod (252);

the top of the connecting rod (252) is provided with a driving piece (24), the driving piece (24) comprises a cylinder (242) fixedly connected with the left side of the connecting rod (252), the cylinder (242) is rotationally connected with the accommodating shell (22), a return spring is connected between the cylinder (242) and the accommodating shell (22), and a driving rod (241) is arranged at the rear side of the cylinder (242) at the top of the connecting rod (252);

the driving rod (241) is in sliding connection with the accommodating shell (22), the bottom of the driving rod (241) is attached to the top of the connecting rod (252), the upper half part of the driving rod (241) is isosceles triangle, the accommodating shell (22) extends towards the inside of the driving rod (241) to form a first extending block (243), a moving groove (245) is formed in the inside of the driving rod (241), a second spring (244) is welded in the moving groove (245), and the first extending block (243) extrudes the second spring (244);

the two-by-two blocking columns (12) are respectively provided with a blocking mechanism (3), each blocking mechanism (3) comprises a mounting plate (31) fixedly connected with the inner walls of two sides of the opening of the outer shell (1), a plurality of second limiting rods (32) which are distributed at equal intervals are fixedly connected with the surface of each mounting plate (31), each second limiting rod (32) is formed by splicing irregular bodies with arc-shaped cross sections of the cuboid of the upper half part and the cross sections of the lower half part, and the lower half parts of the second limiting rods (32) upwards extend to form second extending blocks (33).