CN108040833A - Mobile drip-irrigation device - Google Patents

Mobile drip-irrigation device Download PDF

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Publication number
CN108040833A
CN108040833A CN201711411105.6A CN201711411105A CN108040833A CN 108040833 A CN108040833 A CN 108040833A CN 201711411105 A CN201711411105 A CN 201711411105A CN 108040833 A CN108040833 A CN 108040833A
Authority
CN
China
Prior art keywords
montant
valve
water
tank
drip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN201711411105.6A
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Chinese (zh)
Inventor
蒋秋菊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201711411105.6A priority Critical patent/CN108040833A/en
Publication of CN108040833A publication Critical patent/CN108040833A/en
Withdrawn legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G25/00Watering gardens, fields, sports grounds or the like
    • A01G25/09Watering arrangements making use of movable installations on wheels or the like
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/22Improving land use; Improving water use or availability; Controlling erosion

Abstract

The invention discloses Mobile drip-irrigation devices, including montant and attic base, water storage device is fixedly mounted in montant top, water storage device is divided into rainwater chamber and adds water cavity, rainwater bottom of chamber portion connects rain pipe, add the connection of water cavity bottom and add water pipe, the outer wall on montant top is equipped with connecting rod, the connecting rod is connected by sliding mouth with montant, montant inner valve, the hook of connecting rod hangs up drip irrigation emitter, valve control adds water pipe, add water pipe connection drip irrigation appliance, the junction for adding water pipe and tank is mouth-shaped, floating ball slot is set in tank, movable floating ball is placed in floating ball slot, and with mouth in corresponding and coordinate up and down, tank bottom sets water dropper, water dropper connects tank and outlet pipe.It adjusts the rate of trickle irrigation to greatest extent by valve, drip irrigation emitter, extends the time of trickle irrigation.By detecting the Weight control valve of water in drip irrigation emitter, the time for adding aqueous mode, extending trickle irrigation in arid for adding water cavity is opened.

Description

Mobile drip-irrigation device
Technical field
The present invention relates to water-saving irrigation technique fields, are specially Mobile drip-irrigation device.
Background technology
With the gradual scarcity of water resource, large-scale tree, the method that the irrigation method of urban landscape plant is traditional is direct It is watered with water pipe in root, moisture is allowed to ooze people underground naturally, this irrigation method causes great lot of water resources to waste.And it is raining It can not also collect rainwater and be used as irrigating in the future, these passive irrigations are not to irrigate not in time, are exactly overirrigation, all unfavorable In the growth of plant, the yield and quality of crop, waste water resource are affected.
The content of the invention
It is an object of the invention to provide Mobile drip-irrigation device, to solve the problems mentioned in the above background technology.
To achieve the above object, the present invention provides following technical solution:Mobile drip-irrigation device, including montant 11 and attic base 1, attic base 1 is arranged on the bottom of montant 11, and water storage device is fixedly mounted in 11 top of montant, and water storage device is divided into rainwater chamber 43 and adds Water cavity 44,43 bottom of rainwater chamber connection rain pipe 37 add 44 bottom of water cavity connection first and add water pipe 7;11 top of montant Outer wall is equipped with connecting rod 5, and the connecting rod 5 is connected by sliding mouth 9 with montant 11, and the inner bottom of the montant 11 is equipped with baffle 25, the baffle 25 is connected by the first compression spring 24 with connecting rod 5, and the top of the connecting rod 5 is equipped with mandril 26, described perpendicular The inner tip of bar 11 sets valve;The valve is connected by deck 8 with montant 11;The valve includes valve body 27, valve seat 30 and flap 29 valve body 27 is divided into epicoele 32 and cavity of resorption 31, flap 29 connects valve rod 28 and stretches out valve body 27, under valve rod 28 is located at In chamber 31, being connected between flap 29 and valve body 27 by the second compression spring 35, the second compression spring 35 is located in epicoele 32, under Water inlet 33 on chamber is set, water outlet 34 is set on epicoele;Valve rod 28 is arranged on 26 top of mandril, and coaxial with mandril 26;Institute The one side for stating connecting rod 5 is equipped with link 10, and the bottom of the link 10 is equipped with hook 4;Drip irrigation emitter is hung up on hook 4, it is described Drip irrigation emitter includes babinet 36, and 36 top rain water pipe 37 and second of babinet adds water pipe 45, and rain pipe 37 and second add water pipe 45 all It is connected with tank 38, first adds 7 connecting valve water inlet 33 of water pipe, and second adds 45 connecting valve water outlet 34 of water pipe, the Two add the junction of water pipe 45 and tank 38 as mouth-shaped, and floating ball slot 39, floating ball slot 39 are set in tank 38 Interior placement movable floating ball 40 and with mouth in corresponding up and down and coordinate, 38 bottom of tank setting water dropper 41, water dropper 41 connection tanks 38 and outlet pipe 42.The tank 38 of the drip irrigation emitter is filled in the state of water, drip irrigation emitter entirety matter The pulling force that amount generates to keep at a distance between valve rod 28 and mandril 26;The tank 38 of the drip irrigation emitter is in anhydrous state Under, the pulling force that total quality generates causes mandril 26 to contact valve rod 28, and valve is made to open completely.43 top of rainwater chamber is Open architecture collects rainwater;Add 44 top of water cavity and water inlet is set.The floating ball 40 be hollow ball, floating ball slot 39 for Tubular, diameter is up-small and down-big, and floating ball 40 has up and down space in floating ball slot 39, and more than material uses corrosion resistant modeling Material products are attached using prior art.The lower section of the deck 8 is equipped with pulling plate 6, and the pulling plate 6 runs through montant 11, described Pulling plate 6 is between mandril 26 and the valve rod 28 of valve.The montant 11 is sleeved in hollow cylinder 12, and the montant 11 is through hollow Cylinder 12, the outer wall of the hollow cylinder 12 are equipped with change 3, and the inner wall of the change 3 is equipped with slide bar 17, the outer wall of the montant 11 Equipped with slideway 19, the slide bar 11 is connected with the overlap joint of slideway 19, and the montant 11 is internally provided with groove 18, the groove 18 Fixture block 15 is internally provided with, the hollow cylinder 12 is internally provided with brace 16, and the brace 16 passes through hinge 20 and 12 phase of hollow cylinder Even, the brace 16 is connected by fixture block 15 with the clamping of groove 18, and the left side of the brace 16 is equipped with spring base 23, described oblique Bar 16 is connected by the 3rd compression spring 22 with hollow cylinder 12, and the slide bar 17 is connected with the overlap joint of brace 16, and the attic base 1 passes through Link block 2 is connected with hollow cylinder 12.The outer wall socket rubber sleeve 21 of the 3rd compression spring 22.The bottom of the attic base 1 Supporting leg 14 is installed.The bottom of the supporting leg 14 is equipped with cushion block 13.
Water dropper of the present invention may be employed that the water in tank arbitrarily is become water droplet in the prior art is slow It discharges to the device in outlet pipe.Outlet pipe can be buried to underground or ground proximity, outlet pipe, rain pipe and add water pipe Own wt is lightweight material, be can be ignored compared with the quality of drip irrigation emitter, and rain pipe, the length for adding water pipe do not interfere company The up and down motion of bar.Valve in the present invention can also can realize that external force applies active force to valve rod in the prior art After open water flowing, the two-way valve or other similar structures of obstructed water are closed under normality.
Compared with prior art, the beneficial effects of the invention are as follows:Trickle irrigation is adjusted by valve, drip irrigation emitter to greatest extent Rate extends the time of trickle irrigation.By detecting the Weight control valve of water in drip irrigation emitter, open add water cavity add aqueous mode, Extend the time of trickle irrigation when arid.The drip irrigation appliance is moved with moving slide-bar inside the slideway of hollow cylinder by rotating It is dynamic, fixture block is made to depart from the groove on montant, effectively montant is moved up and down in the inside of hollow cylinder, and montant is carried out Elongation and shortening facilitate adjustment height, the addition convenient for the collection of rainwater and convenient for adding water in water cavity.
Description of the drawings
Fig. 1 is schematic structural view of the invention;
Fig. 2 is the ring revolving structure schematic diagram of the present invention;
Fig. 3 is the brace structure diagram of the present invention;
Fig. 4 is the cunning mouth internal structure schematic diagram of the present invention;
Fig. 5 is the valve mechanism figure of the present invention.
In figure:1st, attic base, 2, link block, 3, change, 4, hook, 5, connecting rod, 6, pulling plate, 7, first adds water pipe, and 8, deck, 9th, sliding mouth, 10, link, 11, montant, 12, hollow cylinder, 13, cushion block, 14, supporting leg, 15, fixture block, 16, brace, 17, slide bar, 18, Groove, 19, slideway, 20, hinge, 21, rubber sleeve, the 22, the 3rd compression spring, 23, spring base, the 24, first compression spring, 25, Baffle, 26, mandril, 27, valve, 28, valve rod, 29, flap, 30, valve seat, 31, cavity of resorption, 32, epicoele, 33, water inlet, 34, go out The mouth of a river, the 35, second compression spring, 36, babinet, 37, rain pipe, 38, tank, 39, floating ball slot, 40, floating ball, 41, water dropper, 42nd, outlet pipe, 43, rainwater chamber, 44, add water cavity, 45, second adds water pipe.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work Embodiment belongs to the scope of protection of the invention.
- 5 are please referred to Fig.1, the present invention provides a kind of technical solution:Mobile drip-irrigation device, including montant 11 and attic base 1, Attic base 1 is arranged on the bottom of montant 11, and water storage device is fixedly mounted in 11 top of montant, and water storage device is divided into rainwater chamber 43 and adds water Chamber 44,43 bottom of rainwater chamber connection rain pipe 37 add 44 bottom of water cavity connection first and add water pipe 7;Outside 11 top of montant Wall is equipped with connecting rod 5, and the connecting rod 5 is connected by sliding mouth 9 with montant 11, and the inner bottom of the montant 11 is equipped with baffle 25, The baffle 25 is connected by the first compression spring 24 with connecting rod 5, and the top of the connecting rod 5 is equipped with mandril 26, the montant 11 inner tip sets valve;The valve is connected by deck 8 with montant 11;The valve includes valve body 27, valve seat 30 Valve body 27 is divided into epicoele 32 and cavity of resorption 31 with flap 29, flap 29 connects valve rod 28 and stretches out valve body 27, and valve rod 28 is located at cavity of resorption It in 31, is connected between flap 29 and valve body 27 by the second compression spring 35, the second compression spring 35 is located in epicoele 32, cavity of resorption It is upper that water inlet 33 is set, water outlet 34 is set on epicoele;Valve rod 28 is arranged on 26 top of mandril, and coaxial with mandril 26;It is described The one side of connecting rod 5 is equipped with link 10, and the bottom of the link 10 is equipped with hook 4;Drip irrigation emitter, the drop are hung up on hook 4 Filling device includes babinet 36, and 36 top rain water pipe 37 of babinet and second add water pipe 45, rain pipe 37 and second add water pipe 45 all with Tank 38 connects, and first adds 7 connecting valve water inlet 33 of water pipe, and second adds 45 connecting valve water outlet 34 of water pipe, and second Add the junction of water pipe 45 and tank 38 as mouth-shaped, floating ball slot 39 is set in tank 38, in floating ball slot 39 Place movable floating ball 40 and with mouth in corresponding up and down and coordinate, 38 bottom of tank setting water dropper 41, water dropper 41 Connect tank 38 and outlet pipe 42.The tank 38 of the drip irrigation emitter is filled in the state of water, drip irrigation emitter total quality The pulling force of generation to keep at a distance between valve rod 28 and mandril 26;The tank 38 of the drip irrigation emitter is in anhydrous state Under, the pulling force that total quality generates causes mandril 26 to contact valve rod 28, and valve is made to open completely.43 top of rainwater chamber is Open architecture collects rainwater;Add 44 top of water cavity and water inlet is set.The floating ball 40 be hollow ball, floating ball slot 39 for Tubular, diameter is up-small and down-big, and floating ball 40 has up and down space in floating ball slot 39, and more than material uses corrosion resistant modeling Material products are attached using prior art.The lower section of the deck 8 is equipped with pulling plate 6, and the pulling plate 6 runs through montant 11, described Pulling plate 6 is between mandril 26 and the valve rod 28 of valve.The montant 11 is sleeved in hollow cylinder 12, and the montant 11 is through hollow Cylinder 12, the outer wall of the hollow cylinder 12 are equipped with change 3, and the inner wall of the change 3 is equipped with slide bar 17, the outer wall of the montant 11 Equipped with slideway 19, the slide bar 11 is connected with the overlap joint of slideway 19, and the montant 11 is internally provided with groove 18, the groove 18 Fixture block 15 is internally provided with, the hollow cylinder 12 is internally provided with brace 16, and the brace 16 passes through hinge 20 and 12 phase of hollow cylinder Even, the brace 16 is connected by fixture block 15 with the clamping of groove 18, and the left side of the brace 16 is equipped with spring base 23, described oblique Bar 16 is connected by the 3rd compression spring 22 with hollow cylinder 12, and the slide bar 17 is connected with the overlap joint of brace 16, and the attic base 1 passes through Link block 2 is connected with hollow cylinder 12.The outer wall socket rubber sleeve 21 of the 3rd compression spring 22.The bottom of the attic base 1 Supporting leg 14 is installed.The bottom of the supporting leg 14 is equipped with cushion block 13.
When drip irrigation appliance is used, montant is configured on the top of hollow cylinder first, montant is in hollow cylinder Portion is moved, and then the outer wall of hollow cylinder is configured change, rotate with moving slide-bar inside the slideway of hollow cylinder into Row movement, slide bar carry out brace the groove that top makes fixture block depart from montant, and effectively montant is carried out in the inside of hollow cylinder It moves up and down, montant is extended and is shortened.Connecting rod 5 is configured on montant 11, connecting rod 5 is carried out in the inside of sliding mouth 9 It is mobile, drip irrigation emitter is hung on the hook 4 of connecting rod 5.The rainwater chamber 43 of water storage device and add water cavity 44 and all fill water, rainwater chamber 43 Water by rain pipe 37 into and full of tank 38, floating ball floats closing horn mouth, blocks the passage for adding water pipe.Water storage The water of container 38 gradually passes through drip nozzle trickle irrigation, in a state that rainwater chamber 43 is completely anhydrous, under the water surface of tank 38 is gradual Drop, floating ball decline, and the passage for adding water pipe is opened.With the weight saving of drip irrigation emitter, the first compression spring 24 promotes connecting rod 5 upward Movement, ejector pin contact valve rod, the weight of drip irrigation emitter persistently mitigate, and mandril jacks up valve rod, and valve is opened, and adds the current in water cavity 44 Enter tank, the weight of drip irrigation emitter no longer mitigates, and starts to increase, and valve becomes closing from opening, and drip irrigation emitter works on.
During the work time, due to the opening and closing opportunity of valve, the weight change of drip irrigation emitter, the trickle irrigation speed of drip irrigation emitter It mutually restricts between degree, when needing fine-grained management, can be adjusted according to common knowledge, for example replace spring, control The maximum amount of water of tank replaces the second compression spring in valve, between drip irrigation emitter full load control valve rod and mandril The modes such as distance.
The presence of pulling plate 6 can control whether the work for adding water cavity operates, and become common drip irrigation appliance.
In the description of the present invention, it is to be understood that term " coaxial ", " bottom ", " one end ", " top ", " in Portion ", " other end ", " on ", " one side ", " top ", " interior ", " forepart ", " center ", the orientation of the instructions such as " both ends " or position close It is based on orientation shown in the drawings or position relationship, to be for only for ease of the description present invention and simplifying description rather than instruction Or imply that signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore be not understood that For limitation of the present invention.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " setting ", " connection ", " Gu It is fixed ", the terms such as " being screwed on " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral; Can be mechanical connection or electrical connection;It can be directly connected, can also be indirectly connected by intermediary, it can be with It is the interaction relationship of connection inside two elements or two elements, unless otherwise restricted clearly, for this field For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace And modification, the scope of the present invention is defined by the appended.

Claims (9)

1. Mobile drip-irrigation device, including montant(11)And attic base(1), it is characterised in that:Attic base(1)It is arranged on montant(11)'s Bottom, montant(11)Water storage device is fixedly mounted in top, and water storage device is divided into rainwater chamber(43)With add water cavity(44), rainwater chamber (43)Bottom connects rain pipe(37), add water cavity(44)Bottom connection first adds water pipe(7);The montant(11)The outer wall on top Equipped with connecting rod(5), the connecting rod(5)Pass through sliding mouth(9)With montant(11)It is connected, the montant(11)Inner bottom be equipped with Baffle(25), the baffle(25)Pass through the first compression spring(24)With connecting rod(5)It is connected, the connecting rod(5)Top installation There is mandril(26), the montant(11)Inner tip set valve;The valve passes through deck(8)With montant(11)It is connected; The valve includes valve body(27), valve seat(30)And flap(29)By valve body(27)It is divided into epicoele(32)And cavity of resorption(31), flap (29)Connect valve rod(28)Stretch out valve body(27), valve rod(28)Positioned at cavity of resorption(31)In, flap(29)With valve body(27)Between lead to Cross the second compression spring(35)Connection, the second compression spring(35)Positioned at epicoele(32)In, water inlet is set on cavity of resorption(33), on Water outlet is set on chamber(34);Valve rod(28)It is arranged on mandril(26)Top, and and mandril(26)Coaxially;The connecting rod(5)'s One side is equipped with link(10), the link(10)Bottom hook is installed(4);Hook(4)On hang up drip irrigation emitter, the drop Filling device includes babinet(36), babinet(36)Top rain water pipe(37)Add water pipe with second(45), rain pipe(37)Add with second Water pipe(45)All with tank(38)Connection, first adds water pipe(7)Connecting valve water inlet(33), second adds water pipe(45)Even Connect valve outlet(34), second adds water pipe(45)With tank(38)Junction for mouth-shaped, tank (38)Interior setting floating ball slot(39), floating ball slot(39)Interior placement movable floating ball(40)And with mouth in up and down it is corresponding simultaneously Cooperation, tank(38)Bottom sets water dropper(41), water dropper(41)Connect tank(38)And outlet pipe(42).
2. Mobile drip-irrigation device according to claim 1, it is characterised in that:The tank of the drip irrigation emitter(38)It deposits In the state of full water, the pulling force that drip irrigation emitter total quality generates causes valve rod(28)And mandril(26)Between keep at a distance;It is described The tank of drip irrigation emitter(38)In the state of anhydrous, the pulling force that total quality generates causes mandril(26)Contact valve rod (28), and valve is made to open completely.
3. Mobile drip-irrigation device according to claim 1, it is characterised in that:The rainwater chamber(43)Top is open Structure collects rainwater;Add water cavity(44)Top sets water inlet.
4. Mobile drip-irrigation device according to claim 1, it is characterised in that:The floating ball(40)For hollow ball, floating ball Slot(39)For tubular, diameter is up-small and down-big, floating ball(40)In floating ball slot(39)Inside there are up and down space, more than material Using corrosion resistant plastic products, it is attached using prior art.
5. Mobile drip-irrigation device according to claim 1, it is characterised in that:The deck(8)Lower section be equipped with pulling plate (6), the pulling plate(6)Through montant(11), the pulling plate(6)In mandril(26)With the valve rod of valve(28)Between.
6. Mobile drip-irrigation device according to claim 1, it is characterised in that:The montant(11)It is sleeved on hollow cylinder (12)In, the montant(11)Through hollow cylinder(12), the hollow cylinder(12)Outer wall be equipped with change(3), the change(3) Inner wall slide bar is installed(17), the montant(11)Outer wall be equipped with slideway(19), the slide bar(11)With slideway(19)It takes Connect connected, the montant(11)Be internally provided with groove(18), the groove(18)Be internally provided with fixture block(15), it is described hollow Cylinder(12)Be internally provided with brace(16), the brace(16)Pass through hinge(20)With hollow cylinder(12)It is connected, the brace (16)Pass through fixture block(15)With groove(18)Clamping is connected, the brace(16)Left side spring base is installed(23), it is described oblique Bar(16)Pass through the 3rd compression spring(22)With hollow cylinder(12)It is connected, the slide bar(17)With brace(16)Overlap joint is connected, institute State attic base(1)Pass through link block(2)With hollow cylinder(12)It is connected.
7. Mobile drip-irrigation device according to claim 6, it is characterised in that:The 3rd compression spring(22)Outer wall It is socketed rubber sleeve(21).
8. Mobile drip-irrigation device according to claim 1, it is characterised in that:The attic base(1)Bottom branch is installed Leg(14).
9. Mobile drip-irrigation device according to claim 7, it is characterised in that:The supporting leg(14)Bottom pad is installed Block(13).
CN201711411105.6A 2017-12-23 2017-12-23 Mobile drip-irrigation device Withdrawn CN108040833A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711411105.6A CN108040833A (en) 2017-12-23 2017-12-23 Mobile drip-irrigation device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711411105.6A CN108040833A (en) 2017-12-23 2017-12-23 Mobile drip-irrigation device

Publications (1)

Publication Number Publication Date
CN108040833A true CN108040833A (en) 2018-05-18

Family

ID=62130750

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711411105.6A Withdrawn CN108040833A (en) 2017-12-23 2017-12-23 Mobile drip-irrigation device

Country Status (1)

Country Link
CN (1) CN108040833A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108934960A (en) * 2018-07-26 2018-12-07 王利利 A kind of solar energy water injector
CN109084532A (en) * 2018-06-28 2018-12-25 湖州吾爱食品有限公司 A kind of efficient food processing dehydration device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109084532A (en) * 2018-06-28 2018-12-25 湖州吾爱食品有限公司 A kind of efficient food processing dehydration device
CN108934960A (en) * 2018-07-26 2018-12-07 王利利 A kind of solar energy water injector

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Application publication date: 20180518

WW01 Invention patent application withdrawn after publication