CN112272993B

CN112272993B - Device for digging pit and fertilizing for multiple times

Info

Publication number: CN112272993B
Application number: CN202011179466.4A
Authority: CN
Inventors: 文世银
Original assignee: Xuancheng Conscience Intellectual Property Service Co ltd
Current assignee: Xuancheng Conscience Intellectual Property Service Co.,Ltd.
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-09-24
Anticipated expiration: 2040-10-29
Also published as: CN112272993A

Abstract

The invention relates to a fertilizer applicator, in particular to a device for once digging and multiple fertilizing, which comprises a charging barrel, braces, a conveying hose, a conveying hard pipe, a handle, a discharging pipe, a first rotating rod, an inserting rod and a film covering press-sealing assembly, wherein the charging barrel is connected with the braces; the two straps are fixed on one side of the charging barrel; one end of the delivery hose is fixed at the bottom of the charging barrel and is communicated with the charging barrel; one end of the material conveying hard pipe is fixedly connected and communicated with the vacant end of the material conveying hose, and a pipe valve is fixedly arranged on the pipeline of the material conveying hard pipe; the cylindrical side surface of the blanking pipe is fixedly connected and communicated with the vacant end of the material conveying hard pipe; the first rotating rod is hinged to the outer side surface of the blanking pipe through a rotating shaft; the lower end of the inserted bar is pointed, the inserted bar is used for being inserted into the ground to form a pit, a limiting ring is fixedly sleeved on the outer side surface of the inserted bar in a penetrating manner, and the inserted bar is made of iron; the handle is fixed on the conveying hard pipe; the laminating press sealing group is used for press sealing the laminating.

Description

Device for digging pit and fertilizing for multiple times

Technical Field

The invention relates to a fertilizer applicator, in particular to a device for digging a pit and applying fertilizer for multiple times.

Background

In order to shorten the ripening period of the watermelon and improve the yield of the watermelon, people often adopt film mulching planting, and mulching films have good effects on increasing temperature and preserving soil moisture of soil, so that the watermelon is early ripe and the yield is increased.

At present, people do to the watermelon fertilization process that the tectorial membrane was planted: cutting the coated film into holes by a knife, penetrating the holes by an iron shovel to dig holes, and then throwing the fertilizer into the holes; the dug soil is filled back into the pit and covered on the upper surface of the fertilizer to prevent the fertilizer from volatilizing.

The inventor of the present application finds that the above-mentioned technology has at least the following technical problems:

firstly, the method comprises the following steps: people scratch the mulching film with a knife, the knife is easy to scratch hands or scratch a large hole on the mulching film, and the scratched large hole is easy to enter air, so that the mulching film cannot play a role in warming and preserving soil moisture;

secondly, the method comprises the following steps: because the watermelon is fertilized for many times from the seedling to the mature stage, a pit needs to be dug every time for burying the fertilizer, the labor intensity of people is increased, and the pit is dug by a shovel for many times, so that the film covering or the watermelon seedling is easily shoveled by the shovel.

Disclosure of Invention

The embodiment of the application solves the technical problems in the prior art by providing the device for digging a pit and fertilizing for multiple times, and realizes mechanical membrane breaking and multiple fertilization resistance by digging for multiple times.

The embodiment of the application provides a device for once digging and multiple fertilizing, which is characterized by comprising a charging barrel, braces, a conveying hose, a conveying hard pipe, a handle, a discharging pipe, a first rotating rod, an inserting rod and a film covering press-sealing assembly;

the feed cylinder is used for containing a fertilizer;

the two straps are fixed on one side of the charging barrel;

one end of the delivery hose is fixed at the bottom of the charging barrel and is communicated with the charging barrel;

one end of the material conveying hard pipe is fixedly connected and communicated with the vacant end of the material conveying hose, and a pipe valve is fixedly arranged on the pipeline of the material conveying hard pipe;

the cylindrical side surface of the blanking pipe is fixedly connected and communicated with the vacant end of the material conveying hard pipe;

the first rotating rod is hinged to the outer side surface of the blanking pipe through a rotating shaft;

the lower end of the inserted bar is pointed, the inserted bar is used for being inserted into the ground to form a pit, a limiting ring is fixedly sleeved on the outer side surface of the inserted bar in a penetrating manner, and the inserted bar is made of iron;

the length of the inserted rod below the limiting ring is 8-14cm longer than that of the blanking pipe;

the handle is fixed on the conveying hard pipe;

the film covering press-sealing assembly comprises a base, a sealing seat, a guide rod fixing rod, a sliding seat, a baffle, a stop rod, a fixing rod and an elastic element;

the base comprises a base body and a fixed pipe;

the upper surface of the base body forms a certain included angle with the horizontal plane;

the fixed pipe vertically penetrates through the base body, the upper surface of the fixed pipe is coplanar with the upper surface of the base body, and the fixed pipe is made of a permanent magnet;

the lower side surface of the sealing seat is attached to the upper surface of the base body, and the sealing seat is used for covering and sealing the upper opening of the fixed pipe;

the two guide rods are respectively positioned at two sides of the axis of the fixed pipe and are parallel to the upper surface of the base body;

the two guide rod fixing rods respectively fix two ends of one guide rod with the upper surface of the base body;

the two sliding seats are respectively sleeved outside the two guide rod fixing rods in a sliding manner; the two sliding seats are respectively fixed on two sides of the sealing seat;

the fixed rod is vertically fixed on one side of the base body with the higher inclined upper surface; one end of the elastic element is fixed on the fixing rod, and the other end of the elastic element is fixed on the sealing seat;

the blocking rod is fixed on the upper surface of the base body and is positioned between the sealing seat and the fixing rod; when the sealing seat props against the stop lever, the sealing seat covers the upper pipe orifice of the fixed pipe;

the baffle is fixed on the upper surface of the sealing seat.

Further, the device also comprises a storage battery, an air pump, a switch, an air inlet pipe, an air outlet pipe and a fixed pipe seat;

the base further comprises a ring groove, an annular elastic bag, a first pipe, a second pipe, a first pressure release valve and a second pressure release valve;

the ring groove is formed in the lower surface of the base body;

the annular elastic bag is sleeved in the annular groove in a penetrating way, and the annular elastic bag is fixed on the outer side wall of the annular groove;

the first pipe penetrates through the base body, the lower end of the first pipe penetrates through the base body and is communicated with the annular groove, and a first pressure release valve is arranged at the upper port of the first pipe; the second pipe penetrates through the base body, the lower end of the second pipe penetrates through the base body and is communicated with the annular elastic bag, and a second pressure release valve is arranged at the upper port of the second pipe;

the storage battery is fixed on one side surface of the charging barrel;

the air suction pump is fixed on one side surface of the charging barrel;

the switch is fixed on the handle and used for controlling the starting and stopping of the air extracting pump;

the storage battery, the air extracting pump and the switch are sequentially and electrically connected in series;

the upper end of the air inlet pipe is fixedly communicated with the air inlet end of the air extracting pump, and the upper end of the air outlet pipe is fixedly communicated with the air outlet end of the air extracting pump;

when the blanking pipe abuts against the upper end opening of the fixed pipe, the lower end of the air inlet pipe abuts against and is communicated with the upper end of the first pipe; the lower end of the air outlet pipe is abutted against and communicated with the upper port of the second pipe.

Further, the sealing seat also comprises a rain inlet, a sealing plug and a water outlet;

a cavity is arranged in the sealing seat, and a rain inlet is formed in the upper surface of the sealing seat;

a water outlet is formed in one side, away from the blocking rod, of the sealing seat;

the water outlet is plugged into a sealing plug, the sealing plug is in a round table shape, one end of the sealing plug, which is located in a cavity of the sealing seat, is a large end, and the sealing plug is used for preventing water in the sealing seat from flowing out.

Further, the device also comprises an expansion seat, a support rod and a second rotating rod;

the expansion seat is fixed on one side of the sealing seat, which is far away from the stop rod, and is made of a solid material with high thermal expansion rate;

one end of the supporting rod is fixed between the expansion seat and the sealing plug;

the second dwang rotates to be fixed in the free end of branch, the both ends of second dwang contact with inflation seat and sealing stopper respectively.

Further, the surface of the expansion seat is processed into black, so that the heat absorption of the expansion seat is facilitated.

Furthermore, the distance ratio between the support rod and the expansion seat and the distance between the support rod and the sealing plug is 1: 10-1: 5.

Further, the numerical value of the pressure relief valve of the second pressure relief valve is 2-5 times larger than that of the first pressure relief valve.

Furthermore, the included angle between the upper surface of the base body and the horizontal plane is 4-10 degrees.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

firstly, the lower end of an inserted bar punctures the film into a hole, and a blade does not cut a hand or cut the film into a large hole; secondly, the pierced hole edge of the covering film is sealed by the lower surface of the base body in a pressing mode, so that the pierced hole edge of the covering film is still well sealed; thirdly, when fertilizing again, only need with first pivot pole with the seal seat from the fixed pipe upper end mouth remove to the unloading pipe supports at the fixed pipe upper end mouth, opens the pipe valve and pours into the chemical fertilizer into the hole, lifts the handle, need not dig a chemical fertilizer pre-buried hole once more.

Drawings

FIG. 1 is a schematic diagram of a part of the mechanism of the present application;

FIG. 2 is an enlarged view of the point A in FIG. 1;

FIG. 3 is an enlarged view of the point B in FIG. 1;

FIG. 4 is a schematic structural view of the insert rod;

FIG. 5 is a top view of the film covered press seal assembly;

FIG. 6 is a bottom view of the film covering press seal assembly;

FIG. 7 is a cross-sectional view E-E of FIG. 5;

FIG. 8 is a view showing the annular elastic bag pressing the coating film;

FIG. 9 is a state diagram of the entire apparatus in use;

FIG. 10 is an enlarged view of a portion of FIG. 9 at C;

fig. 11 is a state diagram of the film covering and press sealing assembly in the process of pressing the film covering and press sealing.

Detailed Description

In order that the invention may be more fully understood, reference will now be made to the accompanying drawings; preferred embodiments of the present invention are illustrated in the accompanying drawings; this invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present; the terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The using method of the once-digging and multiple-fertilizing device comprises a charging barrel 10, a back strap 20, a conveying hose 30, a conveying hard pipe 40, a handle 50, a blanking pipe 60, a first rotating rod 70, an inserted link 135 and a film covering press-sealing assembly;

the cartridge 10 is used to hold fertilizer.

Referring to fig. 1, two straps 20 are fixed to one side of the cartridge 10, and the straps 20 are used to be carried on the shoulder.

Referring to fig. 1, one end of the feed hose 30 is fixed to the bottom of the cartridge 10 and is connected thereto.

Referring to fig. 1, one end of the hard delivery pipe 40 is fixedly connected and communicated with the vacant end of the delivery hose 30, a pipe valve 55 is fixedly arranged on the pipeline of the hard delivery pipe 40, and the pipe valve 55 is used for controlling the on/off of the hard delivery pipe 40.

Referring to fig. 1 and 3, the cylindrical side surface of the blanking pipe 60 is fixedly connected and communicated with the vacant end of the hard conveying pipe 40.

The upper end of the first rotating rod 70 is hinged on the outer side surface of the blanking pipe 60 through a rotating shaft.

The lower end of the inserting rod 135 is pointed, the inserting rod 135 is used for being inserted into the ground to form a pit, referring to fig. 4, a limiting ring 1351 is fixedly sleeved on the outer side surface of the inserting rod 135 in a penetrating manner, and the inserting rod 135 is made of iron.

The inserted rod 135 is 8-14cm longer than the blanking pipe 60 below the limiting ring 1351.

Further, the handle 50 is fixed on the feeding hard pipe 40, so that the position of the blanking pipe 60 can be conveniently controlled by hands.

Referring to fig. 5, 6 and 7, the film covering press-sealing assembly includes a base 140, a sealing seat 150, a guide rod 160, a guide rod fixing rod 170, a sliding seat 180, a baffle 190, a stopper rod 200, a fixing rod 210 and an elastic element 220.

The susceptor 140 includes a susceptor body 141 and a fixing tube 142.

The upper surface of the base body 141 and the horizontal plane form a certain included angle, and further, the included angle between the upper surface of the base body 141 and the horizontal plane is 4-10 degrees.

The fixing tube 142 vertically penetrates through the base body 141, the upper end surface of the fixing tube 142 is coplanar with the upper surface of the base body 141, and the fixing tube 142 is made of a permanent magnet.

The lower side surface of the sealing seat 150 is attached to the upper surface of the base body 141, and the sealing seat 150 is used for sealing the upper port of the fixing tube 142.

Referring to fig. 5, two guide rods 160 are respectively located at two sides of the axis of the fixed tube 142, the guide rods 160 are used for guiding the seal seat 150 to slide along the upper surface of the base body 141, and referring to fig. 7, the guide rods 160 are parallel to the upper surface of the base body 141.

The two guide rod fixing rods 170 respectively fix both ends of one guide rod 160 to the upper surface of the base body 141.

Referring to fig. 5, the two sliding seats 180 are respectively slidably sleeved outside the two guide rod fixing rods 170; the two sliding seats 180 are respectively fixed on two sides of the sealing seat 150 (see fig. 5).

Referring to fig. 7, the fixing rod 210 is vertically fixed to a side of the base body 141 having a higher inclined upper surface; one end of the elastic element 220 is fixed on the fixing rod 210, and the other end of the elastic element 220 is fixed on the sealing seat 150, so that the elastic element 220 obliquely pulls the sealing seat 150 upwards, and the elastic element 220 is specifically a spring or a rubber band.

Referring to fig. 7, the stopper rod 200 is fixed on the upper surface of the base body 141, and the stopper rod 200 is located between the sealing seat 150 and the fixing rod 210; when the sealing seat 150 abuts against the stop lever 200, the sealing seat 150 covers the upper nozzle of the fixed pipe 142.

The baffle 190 is fixed on the upper surface of the seal seat 150, and the baffle 190 is used for being abutted by the first rotating rod 70 and driving the seal seat 150 to move downwards from the pipe opening on the fixed pipe 142.

The application principle and the steps are as follows:

1) adding a fertilizer into the charging barrel 10;

2) carry the harness 20 on the shoulder;

3) inserting the insert rod 135 into the blanking pipe 60, and abutting the limiting ring 1351 on the insert rod 135 against the upper pipe opening of the blanking pipe 60;

4) sleeving the film covering press seal assembly on the inserted rod 135 from the lower end of the inserted rod 135;

the sealing seat 150 of the film covering press-sealing assembly is obliquely pulled downwards along the upper surface of the base body 141; so that the fixing tube 142 is sleeved on the insertion rod 135 (the fixing tube 142 made of the permanent magnet material is adsorbed on the iron insertion rod 135), and meanwhile, the lower end of the first rotating rod 70 abuts against the baffle 190 and the sealing seat 150 is kept away from the upper nozzle of the fixing tube 142 (see fig. 10);

5) simultaneously holding the handle 50 and the upper section of the insertion rod 135 to exert downward force, and inserting the lower end of the insertion rod 135 into the thin film and the soil;

the upper section of the handle 50 and the plunger 135 are held to exert force downwards; firstly, the lower end of the inserting rod 135 punctures the film by one hole (the situation that a hand is scratched by a blade or the film is scratched by a large hole does not occur), the lower end of the inserting rod 135 together with the fixing tube 142 of the film pressing and sealing assembly is inserted into the soil, and the lower surface of the base body 141 presses and seals the punctured hole edge of the film, so that the punctured hole edge of the film is still well sealed;

6) the handle 50 is held still, and the inserted rod 135 is pulled out from the blanking pipe 60;

7) after the pipe valve 55 is opened for a preset duration, the pipe valve 55 is closed;

opening the pipe valve 55, allowing the fertilizer in the feed cylinder 10 to sequentially pass through the delivery hose 30, the delivery hard pipe 40, the blanking pipe 60 and the fixing pipe 142 to reach a pit formed by inserting the insertion rod 135 downwards, and closing the pipe valve 55 when the fertilizer in the pit reaches a preset application amount;

8) lifting the handle 50;

by lifting the handle 50, the first rotating rod 70 is gradually separated from the baffle 190, the sealing seat 150 is pulled upwards by the elastic element 220 and props against the baffle rod 200, and the sealing seat 150 covers the upper port of the fixed pipe 142 to prevent the volatilization of the fertilizer;

9) after 10-20 days, when fertilizing again, holding the handle 50 to force downwards to remove the sealing seat 150 from the upper end opening of the fixed pipe 142, enabling the discharging pipe 60 to abut against the upper end opening of the fixed pipe 142, opening the pipe valve 55 for a period of time, completing fertilizing again of the land (when fertilizing again, a fertilizer pre-buried pit does not need to be dug), and lifting the handle 50;

referring to fig. 10, when the handle 50 is held downward, the lower end of the first rotating rod 70 abuts against the side of the baffle 190 adjacent to the elastic element 220, as the upper handle 50 continues to move downward, the upper end of the first rotating rod 70 rotates, and the lower end of the first rotating rod 70 moves the baffle 190 downward along the slope of the base body 141, so that the sealing seat 150 is removed from the upper end opening of the fixed pipe 142, the discharging pipe 60 abuts against the upper end opening of the fixed pipe 142, and the pipe valve 55 is opened for a period of time to finish the re-fertilization of the soil, that is, when the re-fertilization is performed, a fertilizer pre-buried pit does not need to be dug;

in summary, firstly, the lower end of the inserting rod 135 punctures the film into one hole, and the hand is not cut by the blade or the film is not cut into a large hole; secondly, the lower surface of the base body 141 presses and seals the pierced hole edge of the coating film, so that the pierced hole edge of the coating film is still well sealed; thirdly, when fertilizing again, only the first rotating rod 70 is needed to move the sealing seat 150 away from the upper end opening of the fixed pipe 142, the discharging pipe 60 abuts against the upper end opening of the fixed pipe 142, the pipe valve 55 is opened to inject the fertilizer into the pit, the handle 50 is lifted upwards, and a fertilizer pre-buried pit does not need to be dug again;

referring to fig. 11, when the base body 141 is pressed against the punctured opening, there may be a situation shown in fig. 11, that is, there is a depression in the ground below the base body 141, so that the covering film cannot be pressed and sealed by the lower surface of the base body 141, and the covering film leaks, and cannot perform a good warming and moisture preservation function.

Further, the device comprises a storage battery 80, an air pump 90, a switch 100, an air inlet pipe 110, an air outlet pipe 120 and a fixed pipe seat 130.

The base 140 further includes a ring groove 143, an annular elastic bag 144, a first pipe 145, a second pipe 146, a first relief valve 148a, and a second relief valve 148 b.

Referring to fig. 6 and 7, the ring groove 143 is opened on the lower surface of the base body 141.

The annular elastic bag 144 is sleeved in the ring groove 143, and the annular elastic bag 144 is fixed on the outer side wall of the ring groove 143.

The first pipe 145 penetrates through the base body 141, the lower end of the first pipe 145 penetrates through the base body 141 and is communicated with the annular groove 143, and a first pressure relief valve 148a is arranged at the upper port of the first pipe 145; the second tube 146 penetrates through the base body 141, the lower end of the second tube 146 penetrates through the base body 141 and is communicated with the annular elastic bag 144, and a second pressure relief valve 148b is arranged at the upper port of the second tube 146.

The battery 80 is fixed to one side of the cartridge 10.

The suction pump 90 is fixed to one side surface of the cartridge 10.

The switch 100 is fixed on the handle 50, and the switch 100 is used for controlling the starting and stopping of the air pump 90.

The storage battery 80, the air pump 90 and the switch 100 are electrically connected in series in sequence.

Referring to fig. 1 and 2, the upper end of the air inlet pipe 110 is fixedly communicated with the air inlet end of the air pump 90, and the upper end of the air outlet pipe 120 is fixedly communicated with the air outlet end of the air pump 90, that is, when the air pump 90 works, air flows along the air inlet pipe 110, the air pump 90 and the air outlet pipe 120 in sequence.

Referring to fig. 11, when the blanking pipe 60 abuts against the upper end of the fixed pipe 142, the lower end of the air inlet pipe 110 abuts against and is communicated with the upper end of the first pipe 145; the lower end of the air outlet pipe 120 is abutted against and communicated with the upper port of the second pipe 146.

The step 6) further comprises starting the switch 100.

Starting a switch 100, wherein the air extracting pump 90 works, and when the air extracting pump 90 extracts air so that the pressure in the air inlet pipe 110 and the air outlet pipe 120 reaches the threshold values of the first pressure relief valve 148a and the second pressure relief valve 148b, the first pressure relief valve 148a and the second pressure relief valve 148b are opened; because air in the first tube 145 enters the suction pump 90 up the intake tube 110, the film is sucked up and into the annular groove 143; meanwhile, air sequentially passes through the air suction pump 90, the air outlet pipe 120 and the second pipe 146 to enter the annular elastic bag 144, the annular elastic bag 144 expands due to gas filling, and the film in the annular groove 143 is clamped by the expanded annular elastic bag 144 and the inner wall of the annular groove 143 (see fig. 8), so that the film at the hollow part can be still sealed by the base 140 in a pressing mode, namely the film keeps a good heat preservation effect.

Because the growth volume of watermelon is great, so will supply sufficient moisture to watermelon seedling, although the tectorial membrane can moisturize, but the moisture that is required of watermelon plant is not enough far away.

Further, the sealing seat 150 further comprises a rain inlet 151, a sealing plug 152 and a water outlet 153;

a cavity is arranged in the sealing seat 150, and a rain inlet 151 is formed in the upper surface of the sealing seat 150;

a water outlet 153 is formed on one side of the sealing seat 150 far away from the gear lever 200.

The water outlet 153 is plugged into a sealing plug 152, the sealing plug 152 is in a circular truncated cone shape, one end of the sealing plug 152, which is located in the cavity of the sealing seat 150, is a large end, and the sealing plug 152 is used for preventing water in the sealing seat 150 from flowing out.

When it rains in the weather, water enters the inner cavity of the sealing seat 150 from the rain inlet 151 of the sealing seat 150, the water in the inner cavities of the sealing seat 150 and the sealing seat 150 overcomes the elastic force of the elastic element 220 and moves downwards, so that the sealing seat 150 is moved away from the upper end opening of the fixed tube 142, that is, rainwater can enter a pit in the soil (a pit in which the inserted rod 135 is originally inserted in the soil) from the upper end opening of the fixed tube 142, and further supplement the soil moisture below the covering film; when people stay sunny, people open the sealing plug 152 to discharge water into the inner cavity of the sealing seat 150, so that the sealing seat 150 returns to the upper side of the upper end of the fixed pipe 142.

Further, referring to fig. 5, the device further includes an expansion seat 230, a support rod 240, and a second rotating rod 250;

the expansion seat 230 is fixed on the side of the sealing seat 150 away from the stopper rod 200, the expansion seat 230 is preferably made of a solid material with a high thermal expansion rate, and further, the surface of the expansion seat 230 is treated to be black, which is beneficial to the heat absorption of the expansion seat 230.

One end of the supporting rod 240 is fixed between the expansion seat 230 and the sealing plug 152.

The second rotating rod 250 is rotatably fixed at the free end of the supporting rod 240, and two ends of the second rotating rod 250 are respectively in contact with the expansion seat 230 and the sealing plug 152.

Further, the ratio of the distance between the rod 240 to the expansion seat 230 and the distance between the rod 240 to the sealing plug 152 is between 1:10 and 1:5, i.e. the action of the sealing plug 152 is made more sensitive when the expansion seat 230 is expanded.

Rainwater enters the inner cavity of the sealing seat 150 from the rainwater inlet 151 of the sealing seat 150, and the sealing seat 150 is removed from the upper end opening of the fixed pipe 142; referring to fig. 5, when weather is released, the expansion seat 230 is heated to expand, the second rotating rod 250 rotates, and the sealing plug 152 is further pushed to the inner cavity of the sealing seat 150, that is, the water outlet 153 of the sealing seat 150 is opened, water in the sealing seat 150 flows out, and the sealing seat 150 returns to the upper side of the upper end of the fixed tube 142; manual water drainage is not needed.

Further, the numerical value of the pressure relief valve of the second pressure relief valve 148b is 2-5 times greater than that of the pressure relief valve of the first pressure relief valve 148a, so that the coating film can be ensured to be sucked into the annular groove 143 first, and then the annular bag 144 is inflated with air to expand to extrude part of the coating film to the inner side wall of the annular groove 143; the annular bladder 144 is prevented from expanding to fill the annular groove 143 before the film enters the annular groove 143, thereby causing the film to enter the non-ringremoving groove 143.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and variations of the present invention may occur to those skilled in the art; any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The device for digging a pit once and fertilizing for multiple times is characterized by comprising a charging barrel, braces, a conveying hose, a conveying hard pipe, a handle, a discharging pipe, a first rotating rod, an inserting rod and a film covering press-sealing assembly;

the feed cylinder is used for containing a fertilizer;

the two straps are fixed on one side of the charging barrel;

the handle is fixed on the conveying hard pipe;

the base comprises a base body and a fixed pipe;

the baffle is fixed on the upper surface of the sealing seat;

the baffle is used for being supported by first pivot pole lower extreme and drive the seal seat and follow fixed pipe upper orifice department and move away from downwards.

2. The device for digging a pit and fertilizing a plurality of times for one time according to claim 1, further comprising a storage battery, a suction pump, a switch, an air inlet pipe, an air outlet pipe and a fixed pipe seat;

the ring groove is formed in the lower surface of the base body;

the storage battery is fixed on one side surface of the charging barrel;

the air suction pump is fixed on one side surface of the charging barrel;

3. The device for multiple fertilizing with one digging pit as claimed in claim 1,

the sealing seat also comprises a rain inlet, a sealing plug and a water outlet;

4. The device for multiple fertilizing with one digging pit as claimed in claim 3,

the expansion seat, the supporting rod and the second rotating rod are further included;

5. The device for multiple fertilizing with one digging pit as claimed in claim 4,

the surface of the expansion seat is processed into black, which is beneficial to the heat absorption of the expansion seat.

6. The device for multiple fertilizing with one digging pit as claimed in claim 4,

the ratio of the distance from the support rod to the expansion seat to the distance from the support rod to the sealing plug is 1: 10-1: 5.

7. The device for multiple fertilizing with one digging pit as claimed in claim 2,

the numerical value of the pressure relief valve of the second pressure relief valve is 2-5 times larger than that of the first pressure relief valve.

8. The device for multiple fertilizing with one digging pit as claimed in claim 1,

the included angle between the upper surface of the base body and the horizontal plane is 4-10 degrees.