CN214800787U - Portable liquid manure watering device suitable for horticulture cultivation - Google Patents

Abstract

The utility model relates to the technical field of irrigation of horticultural vegetation, in particular to a movable water-fertilizer irrigation device suitable for horticultural cultivation, which comprises a fixed frame, a fertilizer barrel arranged in the center of the fixed frame and an irrigation head movably connected with the fixed frame; the fixed frame comprises a base, a supporting plate and a second telescopic rod; the supporting plate is movably arranged right above the base through a second telescopic rod; a motor is arranged in the center of the top of the supporting plate, and a telescopic assembly is arranged at the top end of the motor; the output end of the motor penetrates through the supporting plate and is connected with the stirring assembly. The utility model adopts the telescopic component, the motor and the stirring component, so that the motor can drive the stirring component to rotate in the fertilizer barrel to fully stir the liquid manure in the fertilizer barrel; make the liquid manure pour into the watering head in back, can stretch out and draw back through flexible subassembly, the drive watering head is rotatory around the mount, changes the spraying angle and the spraying scope of watering head spray end, has satisfied the liquid manure watering demand of different vegetation in the horticulture cultivation process.

Description

Portable liquid manure watering device suitable for horticulture cultivation

Technical Field

The utility model relates to a horticulture vegetation watering technical field specifically is a portable liquid manure watering device suitable for horticulture cultivation.

Background

With the continuous progress of society, people pay more and more attention to the daily living environment and pay more and more attention to the artistic quality of the environment. The gardening cultivation is to construct a green and beautiful living environment after cultivating fruit trees, vegetables and ornamental plants.

The water fertilizer is the most common waste material in the gardening cultivation, and the vegetation can be effectively promoted to grow by mixing the chemical fertilizer with the water body and then fertilizing the vegetation. Most of the existing irrigation devices for gardening cultivation are of fixed structures, which are not beneficial to mobile irrigation, and the existing irrigation devices cannot fully stir water and fertilizer, cannot ensure the full fusion of the fertilizer and the water body, and cannot ensure the fertilizing concentration; meanwhile, most of the existing irrigation devices for gardening cultivation are fixed in size, adaptability adjustment cannot be performed according to the types of vegetation to be irrigated, irrigation angles and irrigation ranges cannot be adjusted according to growth requirements of the vegetation, and certain limitations exist.

Disclosure of Invention

An object of the utility model is to provide a portable liquid manure watering device suitable for horticulture cultivation to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a movable water and fertilizer irrigation device suitable for gardening cultivation comprises a fixed frame, a fertilizer barrel arranged in the center of the fixed frame and an irrigation head movably connected with the fixed frame; the bottom end of the fixing frame is provided with a universal wheel, and the pouring head is communicated with the fertilizer barrel through a material injection assembly; the fixed frame comprises a base, a supporting plate and a second telescopic rod; the supporting plate is movably arranged right above the base through a second telescopic rod; the fertilizer barrel is fixed in the center of the top of the base; a motor is arranged in the center of the top of the supporting plate, and a telescopic assembly detachably connected with the irrigation head is arranged at the top end of the motor; the output end of the motor penetrates through the supporting plate and is connected with the stirring assembly, the stirring assembly is located inside the fertilizer barrel, and the fertilizer in the fertilizer barrel is stirred and mixed.

Preferably, among the above-mentioned portable liquid manure pouring device suitable for horticulture cultivation, be equipped with the visual window on the lateral wall of fertilizer bucket, the top of fertilizer bucket is equipped with the sprue, be equipped with sealed lid on the sprue.

Based on the technical characteristics, the fertilizer content in the fertilizer barrel is observed through the visual window, so that the fertilizer can be supplemented in time when the fertilizer content in the fertilizer barrel is insufficient; and sealed lid can seal the fertilizer bucket to can expose the sprue through opening of sealed lid, supply the user to annotate the material operation to the fertilizer bucket.

Preferably, in the movable water and fertilizer pouring device suitable for horticultural cultivation, a pair of grooves are symmetrically formed in the supporting plate, and the pouring head is hinged to the inner part of each groove.

Based on the technical characteristics, the irrigation head can move in the groove of the supporting plate, so that the irrigation head can be vertically suspended between the base and the supporting plate under the action of self gravity when not used, the occupied space of the irrigation head is reduced, and the volume of the device is reduced; and the watering head upset is connected the back with flexible subassembly, can change the watering scope of watering head along with flexible lower swing of flexible subassembly, satisfies the liquid manure watering demand of the different vegetation of horticulture cultivation in-process.

Preferably, in the movable water and fertilizer pouring device suitable for gardening cultivation, the telescopic assembly comprises two magnetic suction seats, two telescopic rods I and a fixed seat; the two magnetic suction seats are respectively and movably arranged at one end of the first two telescopic rods and are used for being connected with the irrigation head at the side in a magnetic suction manner; one end of the first telescopic rod, which is far away from the magnetic attraction seat, is movably connected with the fixed seat.

Based on above-mentioned technical characteristic, inhale the seat through the magnetism and inhale fixedly with watering first magnetism for when flexible activity of telescopic link of flexible subassembly, can drive watering head and rotate in the articulated end department of recess, change the spray angle and the position of watering first shower end, thereby changed watering first watering scope, satisfied the liquid manure of the different vegetation of horticulture cultivation in-process and watered the demand.

Preferably, in the movable water and fertilizer pouring device suitable for horticultural cultivation, the material pouring assembly comprises a material guide seat arranged on the support plate and a material pouring pump arranged at the top of the fertilizer barrel; the material guide seat is positioned outside the motor, and two ends of the material guide seat are communicated with the two pouring heads through elastic hoses; the output end of the material injection pump is communicated with the material guide seat through a pipeline, the input end of the material injection pump is connected with a material guide pipe, and the bottom end of the material guide pipe extends to the lower part inside the fertilizer barrel.

Based on the technical characteristics, the fertilizer in the fertilizer barrel is conveyed to the guide seat from the bottom end of the guide pipe through the material injection pump, and then is injected into the corresponding irrigation head through the elastic hoses at the two ends of the guide seat, so that the fertilizer in the fertilizer barrel can be stably sprayed into the irrigation head.

Preferably, in the movable liquid manure pouring device suitable for horticultural cultivation, the stirring assembly comprises a connecting seat connected with the output end of the motor, a rotating shaft rotatably connected with the fertilizer barrel through a sealed bearing and stirring blades arranged on the outer side of the rotating shaft; the connecting seat is arranged on the outer side of the upper end of the rotating shaft in a sliding manner and is positioned right above the fertilizer barrel; ribs are uniformly arranged on the outer side wall of the rotating shaft above the fertilizer barrel, and a sliding groove matched with the ribs is arranged in the inner cavity of the connecting seat; the stirring blade is positioned in the inner cavity of the fertilizer barrel.

Based on the technical characteristics, when the motor drives the connecting seat to rotate, the connecting seat can drive the rotating shaft to rotate under the action of the sliding groove and the ribs, so that the stirring blades arranged on the outer side of the rotating shaft in the fertilizer barrel can mix and stir the fertilizer in the fertilizer barrel, and the phenomenon of uneven mixing of the water and the fertilizer in the mixing process is avoided; and when the fixed frame changed interval between base and the backup pad under the two effects of telescopic link, can slide each other and keep zonulae occludens between connecting seat and the pivot, can cause the influence to the stirring subassembly when avoiding the mount to adjust the use height, guaranteed the stirring subassembly to the continuous stirring of fertilizer bucket.

Preferably, in the movable water and fertilizer pouring device suitable for horticultural cultivation, the stirring blade comprises a first blade and a second blade; the first blade is located above the second blade and is of a 7-shaped structure, and the vertical end of the first blade is located on the outer side of the second blade.

Based on above-mentioned technical characteristics, blade one and blade two can be at the stirring leaf rotation in-process, can stir the fertilizer of different positions in the fertilizer bucket, and the liquid manure in the abundant mixed fertilizer bucket has effectively avoided the liquid manure to appear layering, pile up and mix uneven phenomenon.

Compared with the prior art, the beneficial effects of the utility model are that:

1) according to the movable water and fertilizer irrigation device suitable for gardening cultivation, the motor can drive the stirring component to rotate inside the fertilizer barrel by adopting the telescopic component, the material injection component, the motor and the stirring component, so that water and fertilizer in the fertilizer barrel are fully stirred; after the material injection assembly injects the uniformly stirred liquid manure into the irrigation head, the irrigation head can be driven to rotate around the fixing frame through the extension assembly connected with the irrigation head, the spraying angle and the spraying range of the spraying end of the irrigation head are changed, and the liquid manure irrigation requirements of different vegetation in the gardening cultivation process are met;

2) according to the movable water and fertilizer irrigation device suitable for gardening cultivation, the base, the supporting plate and the telescopic rod II form the fixing frame, and the universal wheels are arranged at the bottom of the fixing frame, so that the fixing frame can move through the universal wheels, and the convenience of irrigating plants and plants by the device is improved; the fixed frame can change the distance between the base and the supporting plate through the extension of the telescopic rod II, so that the use height of the fixed frame is changed, and the irrigation head can adjust the height according to the irrigation requirements of vegetation with different heights;

3) this portable liquid manure watering device suitable for horticulture cultivation can dismantle the watering head and the flexible subassembly of connection through the adoption for the watering head can be directly be connected with flexible subassembly and adjust the watering angle when using, can separate with flexible subassembly under the first unused state of watering simultaneously, makes the watering head hang perpendicularly between base and backup pad under self action of gravity, reduces the occupation space of watering head, reduces the device volume.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

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

fig. 2 is a schematic view of a partial structure of the fertilizer barrel after being connected with the material injection assembly and the stirring assembly;

fig. 3 is the utility model discloses the connecting seat and the pivot junction cut open the structure sketch map bow.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a base; 2. a fertilizer barrel; 3. a support plate; 31. a groove; 4. a watering head; 5. a telescoping assembly; 51. a magnetic attraction seat; 52. a first telescopic rod; 53. a fixed seat; 6. a material injection assembly; 61. an elastic hose; 62. a material guide seat; 63. a material injection pump; 64. a material guide pipe; 7. a motor; 8. a stirring assembly; 81. a connecting seat; 811. a sliding groove; 82. a rotating shaft; 821. a rib; 83. a first blade; 84. a second blade; 9. and a second telescopic rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a movable water and fertilizer irrigation device suitable for gardening cultivation comprises a fixed frame, a fertilizer barrel 2 arranged in the center of the fixed frame and an irrigation head 4 movably connected with the fixed frame; the bottom end of the fixing frame is provided with universal wheels, and the watering head 4 is communicated with the fertilizer barrel 2 through a material injection assembly 6; the fixed frame comprises a base 1, a supporting plate 3 and a second telescopic rod 9; the supporting plate 3 is movably arranged right above the base 1 through a second telescopic rod 9; the fertilizer barrel 2 is fixed in the center of the top of the base 1; a motor 7 is arranged in the center of the top of the supporting plate 3, and a telescopic component 5 detachably connected with the irrigation head 4 is arranged at the top end of the motor 7; the output end of the motor 7 penetrates through the supporting plate 3 and is connected with a stirring component 8, and the stirring component 8 is positioned inside the fertilizer barrel 2 and is used for stirring and mixing the fertilizer in the fertilizer barrel 2; in the embodiment, when the second telescopic rod 9 is stretched, the distance between the base 1 and the support plate 3 can be changed, so that the use height of the fixing frame is changed, and the irrigation head 4 can be adjusted in height according to the irrigation requirements of vegetation with different heights; the motor 7 can drive the stirring component 8 to mix and stir the fertilizer in the fertilizer barrel 2, so that the full mixing of the water and the fertilizer is ensured; after the irrigation head 4 is connected with the telescopic component 5, the irrigation head 4 can be driven to rotate around the fixing frame through the telescopic component 5 in a telescopic mode, the spraying angle and the spraying range of the spraying end of the irrigation head 4 are changed, so that the water and fertilizer uniformly stirred in the fertilizer barrel 2 can be injected into the irrigation head 4 by the injection component 6 to spray and irrigate the vegetation, the water and fertilizer irrigation requirements of different vegetation in the gardening cultivation process are met, and the applicability of the device is improved;

please refer to fig. 1 and 2 in the drawings of the specification: the outer side wall of the fertilizer barrel 2 is provided with a visual window, the top of the fertilizer barrel 2 is provided with a filling port, and the filling port is provided with a sealing cover; in the embodiment, the fertilizer content in the fertilizer barrel 2 is observed through the visual window, so that the fertilizer can be supplemented in time when the fertilizer content in the fertilizer barrel 2 is insufficient; the sealing cover can seal the fertilizer barrel 2 and can expose the injection port through the opening of the sealing cover, so that a user can perform injection operation on the fertilizer barrel 2;

please refer to fig. 1 in the drawings of the specification: wherein, a pair of grooves 31 are symmetrically arranged on the supporting plate 3, and the watering head 4 is hinged in the grooves 31; in this embodiment, the irrigation head 4 can move in the groove 31 of the support plate 3, so that the irrigation head 4 can be vertically suspended between the base 1 and the support plate 3 under the action of gravity when not in use, thereby reducing the occupied space of the irrigation head 4 and reducing the volume of the device; after the irrigation head 4 is turned over and connected with the telescopic component 5, the irrigation head can swing along with the telescopic component 5, so that the irrigation range of the irrigation head 4 is changed, and the water and fertilizer irrigation requirements of different vegetation in the gardening cultivation process are met;

please refer to fig. 1 in the drawings of the specification: the telescopic assembly 5 comprises two magnetic suction seats 51, two telescopic rods one 52 and a fixed seat 53; the two magnetic suction seats 51 are respectively and movably arranged at one end of the two telescopic rods one 52 and are used for being magnetically connected with the irrigation head 4 at the side; one end of the first telescopic rod 52, which is far away from the magnetic attraction seat 51, is movably connected with the fixed seat 53; in this embodiment, the telescopic assembly 5 is fixed with the irrigation head 4 through the magnetic suction seat 51 in a magnetic manner, so that when the telescopic rod one 52 of the telescopic assembly 5 is moved in a telescopic manner, the irrigation head 4 can be driven to rotate at the hinged end of the groove 31, and the spraying angle and position of the spraying end of the irrigation head 4 are changed, so that the irrigation range of the irrigation head 4 is changed, and the water and fertilizer irrigation requirements of different vegetation in the gardening cultivation process are met;

please refer to fig. 1 and 2 in the drawings of the specification: wherein, the material injection assembly 6 comprises a material guide seat 62 arranged on the support plate 3 and a material injection pump 63 arranged at the top of the fertilizer barrel 2; the material guide seat 62 is positioned outside the motor 7, and both ends of the material guide seat 62 are communicated with the two irrigation heads 4 through the elastic hose 61; the output end of the injection pump 63 is communicated with the material guide seat 62 through a pipeline, the input end of the injection pump 63 is connected with a material guide pipe 64, and the bottom end of the material guide pipe 64 extends to the lower part of the interior of the fertilizer barrel 2; in this embodiment, the fertilizer in the fertilizer barrel 2 is transported to the material guiding seat 62 from the bottom end of the material guiding pipe 64 by the material injecting pump 63, and then is injected into the corresponding irrigation head 4 through the elastic hoses 61 at the two ends of the material guiding seat 62, so as to ensure that the fertilizer in the fertilizer barrel 2 can be guided into the irrigation head 4 for stable spraying;

please refer to fig. 2 and 3 in the drawings of the specification: the stirring assembly 8 comprises a connecting seat 81 connected with the output end of the motor 7, a rotating shaft 82 rotatably connected with the fertilizer barrel 2 through a sealed bearing and a stirring blade arranged on the outer side of the rotating shaft 82; the connecting seat 81 is arranged at the outer side of the upper end of the rotating shaft 82 in a sliding manner, and the connecting seat 81 is positioned right above the fertilizer barrel 2; ribs 821 are uniformly arranged on the outer side wall of the rotating shaft 82 above the fertilizer barrel 2, and a sliding groove 811 matched with the ribs 821 is arranged in the inner cavity of the connecting seat 81; the stirring blades are positioned in the inner cavity of the fertilizer barrel 2; in this embodiment, when the motor 7 drives the connecting seat 81 to rotate, the connecting seat 81 drives the rotating shaft 82 to rotate under the action of the sliding groove 811 and the ribs 821, so that the stirring blades arranged outside the rotating shaft 82 in the fertilizer barrel 2 can mix and stir the fertilizer in the fertilizer barrel 2, and the phenomenon of uneven mixing of the water and the fertilizer in the mixing process is avoided; when the fixing frame changes the distance between the base 1 and the supporting plate 3 under the action of the second telescopic rod 9, the connecting seat 81 and the rotating shaft 82 can slide mutually and keep tight connection, so that the influence on the stirring assembly 8 caused by the use height adjustment of the fixing frame is avoided, and the continuous stirring of the stirring assembly 8 on the fertilizer barrel 2 is ensured;

please refer to fig. 2 in the drawings of the specification: wherein the stirring blade comprises a first blade 83 and a second blade 84; the first blade 83 is positioned above the second blade 84, the first blade 83 is in a 7-shaped structure, and the vertical end of the first blade 83 is positioned on the outer side of the second blade 84; in this embodiment, the first blade 83 and the second blade 84 can stir fertilizers at different positions in the fertilizer barrel 2 in the rotation process of the stirring blade, so as to fully mix the water and fertilizer in the fertilizer barrel 2, thereby effectively avoiding the phenomena of layering, accumulation and uneven mixing of the water and fertilizer;

in this embodiment, the first telescopic rod 52 and the second telescopic rod 9 both adopt electric telescopic rods, so that the first telescopic rod 52 and the second telescopic rod 9 can be automatically stretched according to the requirements of a user, the device is driven to be automatically adjusted, and the convenience of operation of the device is improved; an iron sheet (not shown in the figure) fixed with the magnetic suction seat 51 in a magnetic suction manner is arranged on the outer side of the irrigation head 4, so that the irrigation head 4 can be connected with the magnetic suction seat 51 of the telescopic component 5 in a magnetic suction manner;

in this embodiment, the device further includes a control button (not shown in the figure) for controlling the first telescopic rod 52, the material injection pump 63, the motor 7 and the second telescopic rod 9, and a power supply connected to the control button for supplying power to each electronic component, so that each electronic component can be powered on or powered off through the control button.

Principle of operation

When the movable water and fertilizer irrigation device suitable for gardening cultivation is used, the movable water and fertilizer irrigation device can move through universal wheels at the bottom of a fixing frame, the irrigation head 4 is overturned to be magnetically connected with a magnetic suction seat 51 of a telescopic component 5 according to the irrigation requirement of vegetation to be irrigated, the irrigation head 4 is driven to overturn through the telescopic rod I52 in a telescopic mode until the spraying angle of the spraying end of the irrigation head 4 reaches a proper position, then the distance between a base 1 and a supporting plate 3 is changed through the telescopic rod II 9 in a telescopic mode, the use height of the fixing frame is further changed, and the spraying position of the spraying end of the irrigation head 4 meets the required irrigation requirement; then the motor 7 is controlled to rotate, the stirring component 8 is driven to rotate through the motor 7, and the fertilizer in the fertilizer barrel 2 is mixed and stirred, so that the full mixing of water and fertilizer is ensured; then make pouring material subassembly 6 pour into the liquid manure of stirring in fertilizer bucket 2 into and water head 4 in to spray the watering to the vegetation, satisfied the liquid manure watering demand of different vegetation in the horticulture cultivation process.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.

Claims (7)

1. A movable water and fertilizer irrigation device suitable for gardening cultivation comprises a fixed frame, a fertilizer barrel (2) arranged in the center of the fixed frame and an irrigation head (4) movably connected with the fixed frame; the bottom end of the fixing frame is provided with universal wheels, and the irrigation head (4) is communicated with the fertilizer barrel (2) through a material injection assembly (6); the method is characterized in that: the fixing frame comprises a base (1), a supporting plate (3) and a second telescopic rod (9); the supporting plate (3) is movably arranged right above the base (1) through a second telescopic rod (9); the fertilizer barrel (2) is fixed in the center of the top of the base (1); a motor (7) is arranged in the center of the top of the supporting plate (3), and a telescopic component (5) detachably connected with the pouring head (4) is arranged at the top end of the motor (7); the output end of the motor (7) penetrates through the supporting plate (3) and is connected with a stirring assembly (8), the stirring assembly (8) is located inside the fertilizer barrel (2), and the fertilizer in the fertilizer barrel (2) is stirred and mixed.

2. A movable water and fertilizer irrigation device suitable for horticultural cultivation as claimed in claim 1, wherein: the outer side wall of the fertilizer barrel (2) is provided with a visual window, the top of the fertilizer barrel (2) is provided with a filling port, and the filling port is provided with a sealing cover.

3. A movable water and fertilizer irrigation device suitable for horticultural cultivation as claimed in claim 1, wherein: a pair of grooves (31) is symmetrically arranged on the supporting plate (3), and the pouring head (4) is hinged inside the grooves (31).

4. A movable water and manure watering device suitable for horticultural cultivation in accordance with any one of claims 1 to 3, wherein: the telescopic assembly (5) comprises two magnetic suction seats (51), two telescopic rods I (52) and a fixed seat (53); the two magnetic suction seats (51) are respectively and movably arranged at one end of the first telescopic rod (52) and are used for being connected with the irrigation head (4) at the side in a magnetic suction manner; one end of the first telescopic rod (52) far away from the magnetic suction seat (51) is movably connected with the fixed seat (53).

5. A movable water and manure watering device suitable for horticultural cultivation in accordance with any one of claims 1 to 3, wherein: the material injection assembly (6) comprises a material guide seat (62) arranged on the support plate (3) and a material injection pump (63) arranged at the top of the fertilizer barrel (2); the material guide seat (62) is positioned outside the motor (7), and both ends of the material guide seat (62) are communicated with the two pouring heads (4) through elastic hoses (61); the output end of the material injection pump (63) is communicated with the material guide seat (62) through a pipeline, the input end of the material injection pump (63) is connected with a material guide pipe (64), and the bottom end of the material guide pipe (64) extends to the lower part inside the fertilizer barrel (2).

6. A movable water and manure watering device suitable for horticultural cultivation in accordance with any one of claims 1 to 3, wherein: the stirring assembly (8) comprises a connecting seat (81) connected with the output end of the motor (7), a rotating shaft (82) rotatably connected with the fertilizer barrel (2) through a sealing bearing and stirring blades arranged on the outer side of the rotating shaft (82); the connecting seat (81) is arranged on the outer side of the upper end of the rotating shaft (82) in a sliding manner, and the connecting seat (81) is positioned right above the fertilizer barrel (2); ribs (821) are uniformly arranged on the outer side wall of the rotating shaft (82) above the fertilizer barrel (2), and a sliding groove (811) matched with the ribs (821) is arranged in the inner cavity of the connecting seat (81); the stirring blade is positioned in the inner cavity of the fertilizer barrel (2).

7. A movable water and fertilizer irrigation device suitable for horticultural cultivation as claimed in claim 6, wherein: the stirring blade comprises a first blade (83) and a second blade (84); the first blade (83) is located above the second blade (84), the first blade (83) is in a 7-shaped structure, and the vertical end of the first blade (83) is located on the outer side of the second blade (84).

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