CN212260052U - Secondary watering device for transplanter - Google Patents
Secondary watering device for transplanter Download PDFInfo
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- CN212260052U CN212260052U CN202021712341.9U CN202021712341U CN212260052U CN 212260052 U CN212260052 U CN 212260052U CN 202021712341 U CN202021712341 U CN 202021712341U CN 212260052 U CN212260052 U CN 212260052U
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Abstract
The utility model discloses a secondary watering device for a transplanter, which comprises a water tank, a water tank cover welding piece, a watering connecting rod, a swing rod, a watering control mechanism and a water outlet hose; the water tank cover welding piece is arranged at the top of the water tank, a pressing type water outlet valve is arranged in the water tank, and the pressing type water outlet valve is arranged on a water outlet formed in the bottom of the water tank; one end of a water outlet hose positioned outside the water tank is connected with the water outlet, and the other end of the water outlet hose is fixedly connected with one end of the swing rod; the other end of the swing rod is hinged with one end of the watering connecting rod, and the middle part of the swing rod is hinged with the outer wall of the water tank; one end of the swing rod close to the watering connecting rod is provided with an arc-shaped plate which is matched with the watering control mechanism to operate, and the arc-shaped plate does reciprocating swing motion along with the swing rod; the watering control mechanism is arranged on the welding piece of the water tank cover. On the basis of not changing the structure of the existing transplanter, the watering amount of each well cellar is greatly increased, and the survival rate of the seedlings transplanted in the dry land is improved.
Description
Technical Field
The utility model relates to a transplanting machine technical field, more specifically the secondary device that waters relates to a transplanter that says so.
Background
The duckbill type transplanter is divided into a single duckbill type transplanter and a multi-duckbill type transplanter, the existing transplanter generally adopts a double-crank parallel four-bar mechanism to drive duckbill movement, the process of the duckbill from the soil entering to the soil exiting is basically static relative to the ground by utilizing a trochoid track of the duckbill, the uprightness of transplantation is ensured, each duckbill bracket of the multi-duckbill type is uniformly distributed on a left disc and a right disc which are eccentrically arranged, each duckbill bracket and the two discs form a double-crank parallel four-bar mechanism, the duckbill of the single duckbill type transplanter is hinged on a transplanting connecting rod, the transplanting connecting rod and the two cranks form a double-crank parallel four-bar mechanism, the single duckbill type transplanter is relatively simple in structure due to the fact that only one duckbill is arranged, the single duckbill type transplanter is relatively suitable for transplanting of crops with large plant spacing such as tobacco, and the;
the current watering device of the duckbilled dry land transplanter has two common types, one type is that the watering device is designed at the back of the duckbilled, the watering device is fixed at the back part of the transplanting connecting rod, the distance between the watering device and the duckbilled is equal to a plant distance, the watering scheme solves the watering problem, but the watering quantity is small, as water is directly watered on the ground surface of the seedling plant, most of the water runs off along the ground surface, the water which can permeate to the root of the seedling plant is little, the survival rate of transplanting the seedling is low, in addition, when the transplanting plant distance needs to be adjusted, the front-back distance between the watering device and the duckbilled needs to be synchronously adjusted, otherwise, the water can not be accurately watered on the seedling;
the other type is a well cellar type transplanter, a synchronous watering device arranged in a duckbill is adopted, and seedlings and water almost synchronously enter a well cellar to finish synchronous watering. Chinese utility model CN201920235201.8 specifically discloses a synchronization device for transplanting and watering.
The watering amount of a common dry land transplanter is smaller at present, generally 200 plus 500ml, the watering amount of each well of a well cellar type transplanter is relatively larger but generally not more than 1000ml, the water amount has no problem in ensuring the survival of transplanted seedlings under the condition of better soil moisture content, but if the watering amount can not be increased any more when the soil moisture content is poor, the survival rate of the planted seedlings is difficult to ensure, and the application of the well cellar type transplanter under the condition of poor soil moisture content is severely restricted.
Therefore, in order to ensure the survival rate of the well cellar type transplanter, the problem that how to increase the watering amount of the well cellar type transplanter watering device needs to be solved urgently by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a secondary device that waters for transplanter to solve the above-mentioned problem that the above-mentioned background art part provided, on the basis that does not change current transplanter structure, increased the volume of watering in every well cellar for storing things by a wide margin, improved the survival rate that the seedling was transplanted in the dry land.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a secondary watering device for a transplanter comprises a water tank, a water tank cover welding piece, a watering connecting rod, a swing rod, a watering control mechanism and a water outlet hose; the water tank cover welding piece is arranged at the top of the water tank, a pressing type water outlet valve is arranged in the water tank, and the pressing type water outlet valve is arranged on a water outlet formed in the bottom of the water tank; one end of the water outlet hose positioned outside the water tank is connected with the water outlet, and the other end of the water outlet hose is fixedly connected with one end of the swing rod; the other end of the swing rod is hinged with one end of the watering connecting rod, and the middle part of the swing rod is hinged with the outer wall of the water tank; one end of the swing rod, which is close to the watering connecting rod, is provided with an arc plate which is matched with the watering control mechanism to operate, and the arc plate does reciprocating swing motion along with the swing rod; the watering control mechanism is arranged on the welding piece of the water tank cover.
The utility model discloses the connecting rod that will water is connected with the current transplanting connecting rod of transplanter, makes the transplanting connecting rod drive accomplish the secondary operation of watering, does not need plus power drive. The lower end of the water outlet hose is driven to swing back and forth by hinging the watering connecting rod with a transplanting connecting rod of the transplanter, when the transplanting connecting rod rotates to the next half of the cycle, a synchronous watering device arranged in the transplanter finishes one-time watering from drainage of a duckbilled built-in water channel, when the transplanting connecting rod rotates to the first half of the cycle, the lower end of the water outlet hose swings back and forth from front, the lower end of the water outlet hose swings back, meanwhile, the watering connecting rod can drive a swing rod to swing, and the arc plate does reciprocating swing motion along with the swing rod and triggers a watering control mechanism to enable the push type water outlet valve to be opened. The water discharged from the water tank accurately enters the well cellar after transplanting seedlings through the water outlet hose.
Preferably, in the secondary watering device for the transplanter, the water tank cover welding piece comprises a cover plate and a water tank cover bracket, the cover plate is welded at the bottom of the water tank cover bracket, and the cover plate covers the opening at the top of the water tank; the water tank cover support is fixedly connected with a rack of the transplanter through U-shaped bolts, so that the secondary watering device for installing the transplanter is ensured not to change any structure of the original transplanter.
Preferably, in the secondary watering device for the transplanter, the watering control mechanism comprises a watering swing arm, a spring seat, a return spring, a watering sliding column and a steel wire retaining ring for a shaft; the watering swing arm is hinged to the water tank cover bracket through a watering swing arm bracket and is matched with the arc-shaped plate for operation; the watering sliding column is positioned in a guide sleeve vertically arranged on the cover plate; the spring seat is fixed on the upper portion of the watering sliding column through a shaft steel wire retaining ring, and the return spring is located between the spring seat and the cover plate.
Preferably, in the secondary watering device for the transplanter, the watering swing arm comprises a support sleeve, and a first control arm and a second control arm which are vertically connected to two ends of the support sleeve; a roller is rotatably arranged at the end part of the first control arm through a pin shaft and is in contact with the outline of the arc-shaped plate; the end of the second control arm is in contact with the top end of the watering slide; the support sleeve penetrates through a through hole formed in the watering swing arm support and is hinged with the support sleeve; the swing rod drives the arc plate to swing, the arc plate is matched with the end part of the first control arm through the roller to drive the watering swing arm to swing clockwise, the end part of the second control arm presses the watering sliding column downwards, the bottom end of the watering sliding column moves downwards to act on the pressing type water outlet valve, and the pressing type water outlet valve is opened to enable water to flow out.
Preferably, in the above-mentioned secondary device of watering for transplanter, the traveller includes slide bar, lock nut and adjusting bolt, adjusting bolt installs in the screw of slide bar, lock nut is located adjusting bolt's screw rod, adjusting bolt accomplishes the back, with lock nut locking is fixed.
Preferably, in the secondary watering device for the transplanter, a gathering port is arranged at the bottom of the water outlet, and the water outlet hose is connected with the water outlet through the gathering port.
Preferably, in the secondary watering device for the transplanter, a water inlet pipe joint is designed at one side of the water tank, and the water tank is communicated with a water storage tank on the transplanter through a water inlet pipe.
Can know via foretell technical scheme, compare with prior art, the utility model discloses a secondary device that waters for transplanter, in view of present well cellar for storing things formula transplanter seedling transplantation and the synchronization of watering go on, the duration of watering of device in step is less than the time of transplanting the rotatory half week of duckbilled, the duckbilled begins to water from burying promptly, unearthed the stop watering, because the frequency of planting of industry standard requirement duckbilled formula transplanter is not less than 40 trunk/min, every trunk duration of watering is less than 1s, consequently the biggest water yield can't be greater than 1000 ml.
The utility model adds a structure which can be used for secondary watering on the basis of the original synchronous watering device, and the secondary watering device for the transplanter is additionally arranged behind the synchronous watering device, so that the original synchronous watering device for the transplanter starts watering after the duckbill enters the soil, stops watering after the soil emerges, starts watering after the synchronous watering device stops, and stops until the duckbill starts to enter the soil; the total watering quantity for transplanting is the sum of the original synchronous watering quantity of the transplanter and the secondary watering quantity of the utility model, and the total watering quantity is more than 2 times of the water quantity of the synchronous watering device in the current transplanter.
The utility model provides a current well cellar for storing things formula transplanter the biggest volume of watering slightly little, is difficult to ensure the problem of transplanting the survival rate when soil moisture content is poor, under the condition that does not change the synchronous device structure that waters of transplanter, through installing the secondary device that waters for the transplanter additional, increased the single trunk water yield by a wide margin, make the volume of watering ensure the water demand that the seedling survived under the soil moisture content extremely poor condition. Not only simplifies the structure of the transplanter, but also increases the watering amount of the single plant, which has important significance for improving the survival rate of the transplanted seedlings under the poor soil moisture.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a front view of an embodiment of the present invention;
fig. 2 is a K-direction view of an embodiment of the present invention;
fig. 3 is a top view of an embodiment of the present invention;
FIG. 4 is a partial cross-sectional view of the watering control mechanism of the present invention;
FIG. 5 is a B-B rotation cross-sectional view of the watering swing arm of the present invention;
fig. 6 is a partial cross-sectional view of the watering slide of the present invention;
fig. 7 is a transmission schematic diagram of the present invention.
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 in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the utility model discloses secondary device that waters for transplanter on the basis that does not change current transplanter structure, has increased the volume of watering in every well cellar for storing things by a wide margin, has improved the survival rate that the seedling was transplanted in nonirrigated farmland.
The utility model discloses a secondary watering device for a transplanter, which comprises a water tank 1, a water tank cover welding piece, a watering connecting rod 2, a swing rod 3, a watering control mechanism and a water outlet hose 4; the water tank cover welding piece is arranged at the top of the water tank 1, a pressing type water outlet valve 7 is arranged in the water tank 1, and the pressing type water outlet valve 7 is arranged on a water outlet formed in the bottom of the water tank 1; one end of a water outlet hose 4 positioned outside the water tank 1 is connected with the water outlet, and the other end of the water outlet hose 4 is fixedly connected with one end of the swing rod 3; the other end of the swing rod 3 is hinged with one end of the watering connecting rod 2, and the middle part of the swing rod 3 is hinged with the outer wall of the water tank 1; one end of the swing rod 3 close to the watering connecting rod 2 is provided with an arc-shaped plate 5 which is matched with the watering control mechanism to operate, and the arc-shaped plate 5 does reciprocating swing motion along with the swing rod 3; the watering control mechanism is arranged on the welding piece of the water tank cover.
The utility model discloses connecting rod 2 that will water is connected with transplanter current transplantation connecting rod 6, makes transplantation connecting rod 6 drive accomplish the secondary operation of watering, does not need the external power drive. The lower end of the water outlet hose 4 is driven to swing back and forth by hinging the watering connecting rod 2 with the transplanting connecting rod 6 of the transplanter, when the transplanting connecting rod 6 rotates to the next half of the cycle, a self-contained synchronous watering device in the transplanter finishes one-time watering from drainage of a duckbilled built-in water channel, when the transplanting connecting rod 6 rotates to the first half of the cycle, the lower end of the water outlet hose 4 swings from front to back, the lower end of the water outlet hose 4 swings back, meanwhile, the watering connecting rod 2 can drive the swing rod 3 to swing, and the arc-shaped plate 5 does reciprocating swing motion along with the swing rod 3 and triggers the watering control mechanism to open the pressing type water outlet valve 7. The water discharged from the water tank 1 accurately enters the well cellar after transplanting seedlings through the water outlet hose 4.
In order to further optimize the technical scheme, the water tank cover welding part comprises a cover plate 8 and a water tank cover bracket 9, the cover plate 8 is welded at the bottom of the water tank cover bracket 9, and the cover plate 8 covers the opening at the top of the water tank 1; the water tank cover bracket 9 is fixedly connected with a frame 11 of the transplanter through a U-shaped bolt 10, so that the secondary watering device for installing the transplanter is ensured not to change any structure of the original transplanter.
In order to further optimize the technical scheme, the watering control mechanism comprises a watering swing arm 12, a spring seat 13, a return spring 14, a watering sliding column 15 and a steel wire retaining ring 16 for a shaft; the watering swing arm 12 is hinged on the water tank cover bracket 9 through a watering swing arm 12 bracket and is matched with the arc-shaped plate 5 for operation; the watering sliding column 15 is positioned in a guide sleeve 17 vertically arranged on the cover plate 8; the spring seat 13 is fixed on the upper part of the watering sliding column 15 through a shaft steel wire retaining ring 16, and the return spring 14 is positioned between the spring seat 13 and the cover plate 8.
In order to further optimize the technical scheme, the watering swing arm 12 comprises a supporting sleeve 18 and a first control arm 19 and a second control arm 20 which are vertically connected to the two ends of the supporting sleeve 18; the end part of the first control arm 19 is rotatably provided with a roller 21 through a pin shaft, and the roller 21 is contacted with the outline of the arc-shaped plate 5; the end of the second control arm 20 is in contact with the top end of the watering slide 15; the supporting sleeve 18 penetrates through a through hole formed in a bracket of the watering swing arm 12 and is hinged; the arc-shaped plate 5 is driven to swing through the swing rod 3, the arc-shaped plate 5 is matched with the end roller 21 of the first control arm 19 to drive the watering swing arm 12 to swing clockwise, the end of the second control arm 20 presses the watering sliding column 15 downwards, the bottom end of the watering sliding column 15 moves downwards to act on the pressing type water outlet valve 7, the pressing type water outlet valve 7 is opened to enable water to flow out, after watering is finished, the watering sliding column 15 can move upwards under the action of the return spring 14, the spring seat 13 and the steel wire baffle ring 16 for the shaft, the pressing type water outlet valve 7 is closed, and the watering swing arm 12 is separated from the arc-shaped plate 5 in contact. That is, when the swing rod 3 rotates counterclockwise from the rightmost side, the contour of the arc-shaped plate 5 acts on the roller 21 to rotate the watering swing arm 12 clockwise, the end of the second control arm 20 presses the watering sliding column 15 downwards, the bottom end of the watering sliding column 15 moves downwards to act on the pressing type water outlet valve 7, and the pressing type water outlet valve 7 is opened to enable water to flow out. When the swing rod 3 continues to swing anticlockwise, the arc-shaped plate 5 is separated from the roller 21 in contact, the watering sliding column 15 is reset under the action of the return spring 14, the watering connecting rod 2 continues to move along with the transplanting connecting rod 6, then the watering connecting rod 2 can drive the swing rod 3 to rotate clockwise, when the swing rod 3 reaches the rightmost end, resetting is achieved, and the watering swing arm 12 does not affect the swing rod 3 in the resetting process.
In order to further optimize the technical scheme, the watering sliding column 15 comprises a sliding rod 23, a locking nut 24 and an adjusting bolt 25, the adjusting bolt 25 is installed in a screw hole of the sliding rod 23, the locking nut 24 is located in a screw rod of the adjusting bolt 25, and after the adjusting bolt 25 is adjusted, the locking nut 24 is used for locking and fixing. The push type water outlet valve 7 can be completely closed when the watering is not performed, and can be completely opened when the watering is performed. The push type water outlet valve 7 is a toilet flushing valve used in the toilet water tank 1 in the prior art.
In order to further optimize the technical scheme, a gathering port 26 is arranged at the bottom of the water outlet, and the water outlet hose 4 is connected with the water outlet through the gathering port 26.
In order to further optimize the technical scheme, a water inlet pipe joint is designed at one side of the water tank 1, and the water tank 1 is communicated with a water storage tank on the transplanter through a water inlet pipe.
The working principle is as follows:
a first output shaft and a second output shaft are arranged in a transplanting transmission box 27 of the existing transplanting machine, a transplanting crank is divided into an upper crank 28 and a lower crank 29, the upper crank 28 is installed on the first output shaft of the transplanting transmission box 27, the lower crank 29 is installed on the second output shaft of the transplanting transmission box 27, the upper crank 28 and the lower crank 29 are respectively hinged with a transplanting connecting rod 6 through a crank pin, the lower end of the transplanting connecting rod 6 is hinged with a transplanting duckbill 22, and the transplanting crank and the transplanting connecting rod 6 form a double-crank mechanism;
the front end of a watering connecting rod 2 is hinged with a transplanting connecting rod 6, the rear end of the watering connecting rod is hinged with the upper end of a swing rod 3, the middle part of the swing rod 3 is hinged on a water tank 1 body, a gathering port 26 is arranged on a water outlet at the lower end of the water tank 1, a water outlet hose 4 is arranged on the gathering port 26, and the lower end of the water outlet hose 4 is fixed at the lower end of the swing rod 3;
when the secondary watering device starts watering, the lower end of the swing rod 3 enables the lower end of the water outlet hose 4 to swing from front to back, the backward swinging speed of the water outlet hose 4 is basically equal to the forward moving speed of the transplanting, the position of water discharged from the water outlet hose 4 relative to a well cellar for transplanting seedlings is basically unchanged, and the secondary watering can accurately enter the well cellar.
Like this current transplanter is from the synchronous device that waters of taking and waters at transplanting duckbilled 22 process of transferring to the next half week, and the secondary device that waters is transplanted duckbilled 22 and is transferred the process of last half week and waters, and the total duration of watering equals approximately to the duckbilled and rotates 1 week's time, therefore its total volume of watering is about 2 times more of present well cellar for storing things formula transplanter maximum water yield.
The distance between the water flowing port at the lower end of the water outlet hose 4 and the front-back direction of the transplanting duckbill 22 is half of the plant distance, the water flowing port at the lower end of the water outlet hose 4 swings forwards when the transplanting duckbill 22 moves backwards, the water flowing port at the lower end of the water outlet hose 4 swings backwards when the transplanting duckbill 22 moves forwards, the backward swinging speed and the advancing speed of the transplanter are mutually offset when the water flowing port at the lower end of the water outlet hose 4 waters, the water flowing port at the lower end of the water outlet hose 4 is just positioned above one side of the well cellar, and watering is started when the water flowing port is static relative to the ground, so.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A secondary watering device for a transplanter is characterized by comprising a water tank, a water tank cover welding piece, a watering connecting rod, a swing rod, a watering control mechanism and a water outlet hose; the water tank cover welding piece is arranged at the top of the water tank, a pressing type water outlet valve is arranged in the water tank, and the pressing type water outlet valve is arranged on a water outlet formed in the bottom of the water tank; one end of the water outlet hose positioned outside the water tank is connected with the water outlet, and the other end of the water outlet hose is fixedly connected with one end of the swing rod; the other end of the swing rod is hinged with one end of the watering connecting rod, and the middle part of the swing rod is hinged with the outer wall of the water tank; one end of the swing rod, which is close to the watering connecting rod, is provided with an arc plate which is matched with the watering control mechanism to operate, and the arc plate does reciprocating swing motion along with the swing rod; the watering control mechanism is arranged on the welding piece of the water tank cover.
2. The secondary watering device for a transplanter according to claim 1, wherein the tank cover welding member comprises a cover plate and a tank cover bracket, the cover plate is welded to the bottom of the tank cover bracket, and the cover plate covers the opening at the top of the tank; the water tank cover bracket is fixedly connected with a rack of the transplanter through a U-shaped bolt.
3. The secondary watering device for the transplanter according to claim 2, wherein the watering control mechanism comprises a watering swing arm, a spring seat, a return spring, a watering slide column and a shaft steel wire retaining ring; the watering swing arm is hinged to the water tank cover bracket through a watering swing arm bracket and is matched with the arc-shaped plate for operation; the watering sliding column is positioned in a guide sleeve vertically arranged on the cover plate; the spring seat is fixed on the upper portion of the watering sliding column through the shaft steel wire retaining ring, and the return spring is located between the spring seat and the cover plate.
4. The secondary watering device for the transplanter according to claim 3, wherein the watering swing arm comprises a support sleeve and a first control arm and a second control arm vertically connected to two ends of the support sleeve; a roller is rotatably arranged at the end part of the first control arm through a pin shaft and is in contact with the outline of the arc-shaped plate; the end of the second control arm is in contact with the top end of the watering slide; the support sleeve penetrates through a through hole formed in the watering swing arm support and is hinged with the support sleeve; the swing rod drives the arc-shaped plate to swing, the arc-shaped plate is matched with the end part of the first control arm through the roller to drive the watering swing arm to swing clockwise, the end part of the second control arm presses the watering sliding column downwards, and the bottom end of the watering sliding column moves downwards to act on the pressing type water outlet valve.
5. The secondary watering device for the transplanting machine as claimed in claim 4, wherein the watering sliding column comprises a sliding rod, a lock nut and an adjusting bolt, the adjusting bolt is installed in a screw hole of the sliding rod, the lock nut is located in a screw rod of the adjusting bolt, and the adjusting bolt is locked and fixed by the lock nut after being adjusted.
6. The secondary watering device for the transplanter according to claim 1, wherein a gathering port is arranged at the bottom of the water outlet, and the water outlet hose is connected with the water outlet through the gathering port.
7. The secondary watering device for the transplanter according to claim 1, wherein a water inlet pipe joint is designed on one side of the water tank, and the water tank is communicated with a water storage tank on the transplanter through a water inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021712341.9U CN212260052U (en) | 2020-08-17 | 2020-08-17 | Secondary watering device for transplanter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021712341.9U CN212260052U (en) | 2020-08-17 | 2020-08-17 | Secondary watering device for transplanter |
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| CN212260052U true CN212260052U (en) | 2021-01-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111919735A (en) * | 2020-08-17 | 2020-11-13 | 许昌职业技术学院 | Secondary watering device for transplanter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111919735A (en) * | 2020-08-17 | 2020-11-13 | 许昌职业技术学院 | Secondary watering device for transplanter |
| CN111919735B (en) * | 2020-08-17 | 2024-05-07 | 许昌职业技术学院 | Secondary watering device for transplanting machine |
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