CN111387168B - Nozzle and herbicide spraying device for synchronous transplanting of rice transplanter - Google Patents

Abstract

The present invention discloses a nozzle comprising a housing having a channel with a front opening and a rear opening. A water column is housed within the channel, capable of sliding along the channel and circulating liquid. The rear end of the water column is connected to a water outlet mechanism, which is configured to withstand the impact of liquid flowing through the water column and to form or enlarge a gap with the rear opening, through which liquid is sprayed. The present invention also discloses a herbicide spraying device for synchronous transplanting with a rice transplanter. The present invention has the beneficial effect of depositing liquid as fine droplets at the transplanting site, making it suitable for synchronous transplanting.

Description

Nozzle and herbicide spraying device for synchronous transplanting of rice transplanter

Technical Field

The invention relates to a nozzle and a herbicide spraying device for synchronous transplanting of a transplanter, which are mainly applied to the field of synchronous transplanting of rice seedlings.

Background

Weed control is a key link for guaranteeing the rice yield and rice quality in China. Weeds can release chemical substances with rice in the aspects of fertilizer competition, water competition, light competition, space competition and root system release, inhibit normal growth of rice, enable the rice to seriously reduce yield and even to be in dead harvest, and are intermediate hosts for transmitting rice diseases and insect pests, so that the quality of rice is seriously influenced and the production safety of rice is endangered. At present, an industry personnel proposes a paddy field 'sowing and spraying synchronous' closed weeding technology, designs spraying equipment and accessories accurately, and successfully screens closed herbicide products suitable for mechanically-direct seeding fields. For example, publication number CN203984920U discloses a multifunctional agricultural device, which comprises a device main body, a transplanting device, a plowing device and a pesticide spraying device, wherein the device main body comprises a basic transmission system and a component transmission system, the rear end of the component transmission system is provided with an output shaft a, the output shaft a extends out of a part of the component transmission system, the section of the output shaft a is square with rounded corners, the transplanting device, the plowing device and the pesticide spraying device all comprise a variable-speed transmission component and a fixed frame, the front end of the variable-speed transmission component is provided with an input shaft a, the input shaft a is a hollow shaft, the hollow section shape is the same as the extending part of the output shaft a, the multifunctional agricultural device integrates herbicide spraying, rice transplanting and plowing functions, and the transplanting device, the plowing device and the pesticide spraying device are all provided with a butt flange plate and a fixed plate which correspond to the device main body, so that the multifunctional agricultural device can be conveniently disassembled and switched, and is suitable for being popularized in a large range in the agricultural field.

The technology of synchronous seedling transplanting and herbicide spraying is proposed, but the herbicide spraying device used by the technology is a spraying system, and the spraying system has certain defects that the herbicide is easy to suspend and diffuse in the air after being sprayed by atomization, can float in an unpredictable direction under the condition of encountering certain wind force, can be sprayed at fixed points accurately, has lower action rate, and is easy to cause physical damage to seedlings if the existing spraying device similar to a spray gun is used, and is unfavorable for the growth of the seedlings.

Disclosure of Invention

One of the technical problems to be solved by the invention is to provide a nozzle which can drop liquid at a transplanting place in the form of fine water drops and is suitable for synchronous transplanting.

The invention is realized by the following technical scheme.

The utility model provides a nozzle, includes the casing, the casing has the passageway, the passageway is equipped with front end opening, rear end opening at the casing, the passageway embeds can follow the passageway slip and be used for the water column of circulation liquid, the water outlet mechanism is connected to the rear end of water column, water outlet mechanism is used for bearing the impact of the liquid of flowing through the water column to form gap or increase gap with the rear end opening between, liquid by the gap blowout.

The principle of the invention is that liquid (herbicide) is input into the shell from the front end opening, flows through the water column and impacts the water outlet mechanism, as the water column can slide along the channel direction in the channel of the shell, a gap is formed between the water outlet mechanism and the rear end opening to output the liquid, the output liquid is not in an atomized state, and is not a water column with certain pressure sprayed by a similar spray gun, the output caliber, namely the size of the gap, is changed by the input intensity of the liquid input into the shell, thus the pressure of the liquid output by the gap cannot be changed too much along with the total intensity of the liquid, and the output liquid drops at the transplanting position or soil in the form of fine water drops, and the output accuracy and the output intensity are tightly combined with the characteristics of transplanting.

As a further improvement of the invention, the water outlet mechanism comprises a split body and a cover body which can be inserted in an opening at the rear end in a matching way, wherein the front end and the rear end of the split body are respectively connected with a water column and the cover body, the front end of the split body is provided with at least two split channels, the liquid flowing through the water column is split from the middle part to the side part, and the split channels at the front end of the split body split the liquid from the middle part to the side part, so that the flow path of the liquid is optimized.

The invention further improves that the rear end of the split fluid is provided with a fixed shaft which is coaxial with the cover body, the cover body is fixed on the fixed shaft, a turntable is arranged between the split fluid and the cover body, the turntable is rotatably sleeved on the fixed shaft, the front end face of the turntable is provided with a plurality of guide vanes which are deviated from warps around the circumference, the characteristics of the space for splitting the guide vanes can average liquid along the outer edge of the circumference of the turntable, namely the liquid sprayed from the outer edge of the circumference of the turntable is more even, and the split liquid impacts the guide vanes to drive the turntable to rotate due to the deviation of the guide vanes from the warps, so that the liquid is sprayed from the adjacent guide vanes to form 360-degree rotation.

As a further improvement of the invention, a positioning ring member connected with the shell is arranged in the channel, the water passing column penetrates through the positioning ring member, the water passing column is sleeved with a pressure spring, two ends of the pressure spring are respectively connected with the positioning ring member and the front end of the water passing column, the pressure spring moves towards the rear end opening along with the water passing column and the water outlet mechanism to generate elastic force, and the elastic force and the acting force of liquid impacting the water outlet mechanism are balanced mutually so as to control the size of the gap.

As a further improvement of the invention, the outer sleeve of the water column and the pressure spring is provided with a first sleeve fixed on the positioning ring piece and a second sleeve fixed on the front end of the water column, the first sleeve is sleeved on or sleeved on the second sleeve in a sliding way, and a plurality of O-shaped rings are arranged on the sliding contact surfaces of the first sleeve, the second sleeve and the water column, so that the pressure spring is in a sealed space and cannot be corroded by liquid, the cylindrical structure can correspondingly deform along with the movement of the water column and the water outlet mechanism, the O-shaped rings can play a role of reinforcing the sealing effect, in addition, the O-shaped rings of the first sleeve and the O-shaped rings of the second sleeve can generate friction force, small fluctuation of the liquid input strength can occur, the friction force generated by the O-shaped rings of the first sleeve and the second sleeve can not actively increase or decrease the liquid input strength, displacement of the water column and the water outlet mechanism can be avoided, and the water column can only actively and obviously increase or decrease the liquid input strength and the water outlet mechanism can generate positive displacement only by accident.

As a further improvement of the invention, a filter vat sleeved outside the first sleeve and the second sleeve is arranged in the channel, the rear end of the filter vat is opened and fixed on the positioning ring piece, the front end cover of the filter vat is used for containing liquid to flow into the vat, the inner wall of the filter vat is provided with a plurality of impurity absorbing parts, and the impurity absorbing parts can be activated carbon used for absorbing solid particle impurities and most organic impurities in the liquid, purifying the filtered liquid and reducing the interference of the impurities on the performance of the filtered liquid.

As a further improvement of the invention, gaps are arranged between the filter vat and the inner wall of the channel to form an annular space, a plurality of strong magnetic pieces are arranged in the annular space, the strong magnetic pieces form magnetic lines of force to magnetize the liquid flowing through the water column, and impurities in the liquid can be charged to generate electric potential in the magnetizing process to become polar substances, so that the original electrostatic attraction state of the impurities is changed, the deposition of calcium, magnesium and the like in the liquid is prevented, a soft crystal is formed to achieve the function of scale prevention, and various impurities in the liquid can be removed better by matching with the impurity absorbing piece.

As a further improvement of the invention, the middle part of the front end cover of the filter vat is a solid area, a plurality of through holes for liquid to pass through are arranged at the part between the solid area and the outer edge of the filter vat, and the guided liquid can fully contact with the filter vat after entering the water column, so that the filtering effect of impurities can be enhanced.

As a further improvement of the invention, the rear end face of the front end cover of the filter vat is provided with the guide cylinder coaxial with the water passing column in the solid area, the outer wall of the guide cylinder is provided with the spiral protruding part, the guide cylinder can further improve the contact rate of liquid and the filter vat, and the spiral protruding part can prolong the flow path of the liquid in the water passing column and increase the contact time with the filter vat.

The second technical problem to be solved by the invention is to provide a herbicide spraying device for synchronous transplanting of a rice transplanter.

The invention is realized by the following technical scheme.

The herbicide spraying device comprises a water tank containing herbicide, a water pipe, a plurality of nozzles which are arranged in parallel at equal intervals on the water pipe, and a water pump for pumping the herbicide in the water tank to the water pipe through the pipeline, wherein the water tank is arranged on the rice transplanter, the water pipe is horizontally arranged below a rice transplanting channel of the rice transplanter, the nozzles are staggered with the rice transplanting channel, the maximum spraying ranges of the adjacent nozzles are not overlapped, and the maximum spraying ranges of the nozzles cover rice transplanting points of the adjacent rice transplanting channels.

The invention has the beneficial effects that:

(1) Compared with the prior art that atomization and spraying are easy to diffuse in air or greatly influenced by wind force, and the prior art that a similar spray gun sprays water columns with certain pressure intensity to damage seedlings, the nozzle sprays liquid in a fine water drop shape, so that the defects can be avoided;

(2) According to the invention, through the fluid separation and the rotary table, the liquid can be separated from the middle part to the side part so as to be conveniently sprayed out from the gap, the guide piece of the rotary table can homogenize the liquid on one hand, and the liquid can be sprayed out in a 'throwing' mode in a 360-degree rotation manner on the other hand, so that the spraying effect is suitable for synchronous transplanting;

(3) According to the invention, the first sleeve, the second sleeve and the O-shaped ring can play a role in sealing the pressure spring, prevent the pressure spring from being corroded to influence the performance, generate a friction effect, prevent the water column from sliding relatively with the water outlet mechanism when the liquid input intensity fluctuates slightly, and improve the spraying stability;

(4) The filter vat of the invention can adsorb solid particle impurities and most organic impurities in liquid, and is provided with a strong magnetic piece outside the filter vat, so that other impurities such as metal can be filtered out through magnetizing the liquid flowing through a water column, and the filter vat has better filtering performance;

(5) The through hole of the front end cover of the filter vat, the guide cylinder and the spiral bulge part can enable liquid to fully contact the filter vat, so that the filtering effect is further improved.

Drawings

FIG. 1 is a schematic cross-sectional view of a nozzle of embodiment 1;

FIG. 2 is a schematic diagram of the structure of a turntable according to embodiment 1;

FIG. 3 is a schematic cross-sectional view of a lid and a rear opening forming a slit according to embodiment 1;

FIG. 4 is a schematic view showing a partial cross section of the first sleeve and the second sleeve according to embodiment 1;

FIG. 5 is a schematic view showing the construction of a herbicide spraying device for synchronous transplanting of rice transplanter according to embodiment 2;

FIG. 6 is a schematic view of plant height and weed control of rice 15 days after the injection of the Sync drug in example 3;

FIG. 7 is a graph showing weed control and rice yield 35 days after "plug-spray synchronization" of example 3.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples.

Embodiment case 1:

Referring to fig. 1-4, the nozzle comprises a shell 1, wherein the shell 1 is composed of a shell front part 11 and a shell rear part 12, the shell front part 11 is in threaded fit connection with the shell rear part 12, the shell 1 is provided with a channel 2, the channel 2 is provided with a front end opening 1-a and a rear end opening 1-B in the shell 1, the channel 2 is composed of a channel front part 21, a channel middle part 22 and a channel rear part 23, the channel front part 21 and the channel middle part 22 are positioned at the shell front part 11, and the channel rear part 23 is positioned at the shell rear part 12. The front part 21 and the middle part 22 are cylindrical, the caliber of the middle part 22 is larger than that of the front part 21, the rear part 23 is in a horn shape with a small front opening and a large rear opening, the size of the front opening is approximately the same as that of the front part 21, more specifically, a section of tubular structure 12-A is arranged in the rear part 12 of the shell and extends into the space of the front part 11 of the shell to form the front opening of the rear part 23, the front opening of the tubular structure is small, the rear opening is large, the shape of the tubular structure is matched with the horn shape of the rear part 23 of the channel, the front end of the tubular structure is provided with a ring-shaped structure serving as a positioning ring member 12-B, and the front end face of the positioning ring member 12-B is provided with a ring of grooves.

The filter vat 3 is arranged in the middle 22 of the channel, the front end of the filter vat 3 is provided with a front end cover 31, the rear end of the filter vat 3 is provided with an opening 1-B, the front end cover 31 is clung to the flange of the front end of the middle 22 of the channel protruding out of the rear end of the front 21 of the channel, the rear end of the filter vat 3 is sleeved on the outer ring of the positioning ring piece 12-B and is tightly attached, therefore, the filter vat 3 is not fixed in the shell 1, and the filter vat 3 can be freely assembled and disassembled when the front 11 and the rear 12 of the shell are disassembled. A water passing column 4 is arranged in the middle part 22 of the channel and the filter drum 3, the water passing column 4 can slide along the channel 2, the water passing column 4 is used for circulating liquid, the rear end of the water passing column 4 is connected with a water outlet mechanism, the water outlet mechanism is positioned at the rear part 23 of the channel, the water outlet mechanism is used for bearing the impact of the liquid flowing through the water passing column 4, a gap 1-c or an enlarged gap 1-c is formed between the water outlet mechanism and the rear end opening 1-B, and the liquid flows through the rear part 23 of the channel and is sprayed out through the gap 1-c.

The main principle of the nozzle is that liquid (herbicide) is input into a shell 1 from a front end opening 1-A, flows through a water column 4 and impacts a water outlet mechanism, the water column 4 and the water outlet mechanism move towards a rear end opening 1-B because the water column 4 can slide along the direction of the channel 2 in the channel 2 of the shell 1, so that a gap 1-c is formed between the water outlet mechanism and the rear end opening 1-B to output the liquid, the output liquid is not in an atomized state, cannot be dispersed into tiny fog drops or particles to suspend in air, is irregularly dispersed in the air or drips in an unpredictable direction due to wind force, and is not directly impacted by water columns with certain pressure sprayed by a similar spray gun, so that certain damage can be caused to seedlings.

The water outlet mechanism comprises a split body 51, a cover 52, a turntable 53 and a split body mounting piece 54, wherein the front end of the split body 51 is fixedly connected with the split body mounting piece 54, the split body mounting piece 54 is fixedly connected with the rear end of the water column 4, the split body mounting piece 54 is used for enhancing the fixing strength between the split body 51 and the water column 4, and radial movement of the water column 4 can be avoided. The front end of the split flow body 51 is provided with two split flow passages 51-a for splitting the liquid flowing through the water column 4 from the middle part to the side part, because the liquid is output by the nozzle of the invention through the gap 1-c between the water outlet mechanism and the rear end opening 1-B, the split flow body 51 is arranged, the split flow body 51 takes the impact of the liquid flowing through the water column 4 as a power source to drive the water column 4 and the water outlet mechanism to move, the split flow passage 51-a at the front end of the split flow body 51 splits the liquid from the middle part to the side part, thereby optimizing the flow path of the liquid, the shape of the cover 52 is matched with the rear end opening 1-B of the shell 1, the rear end of the split flow body 51 is provided with a fixed shaft 511, the fixed shaft 511 is coaxial with the cover 52, and the cover 52 is fixedly arranged on the fixed shaft 511. The turntable 53 is located between the split flow body 51 and the cover 52, and is rotatably sleeved on the fixed shaft 511, the front end surface of the turntable is provided with a plurality of guide vanes 531 which are inclined to warp around the circumference, the inclination angle is 10-30 degrees, the guide vanes 531 have two functions, firstly, the characteristics of the division space of the guide vanes 531 can average the liquid along the outer edge of the circumference of the turntable 53, namely, the liquid sprayed from the outer edge of the circumference of the turntable 53 is relatively average, the local output is avoided from being excessively large, secondly, the split liquid impacts the guide vanes 531 to drive the turntable 53 to rotate, the liquid is sprayed out of the nozzle by 360 degrees rotation between the adjacent guide vanes 531, and compared with the straight line spraying, the spraying mode is similar to 'throwing out'.

The front end of the water passing column 4 radially protrudes, the width of the water passing column is approximately the same as the inner diameter of the filter vat 3, the water passing column 4 is sleeved with a pressure spring 4-a, the front end of the pressure spring 4-a is fixedly connected with the front end of the water passing column 4, the rear end of the pressure spring 4-a stretches into a groove of the positioning ring piece 12-B and is fixedly connected with the positioning ring piece 12-B, the pressure spring 4-a serves as a reset part of the water passing column 4 and the water outlet mechanism, moves towards the rear end opening 1-B along with the water passing column 4 and the water outlet mechanism to generate elastic force, and is balanced with the acting force of liquid impacting the water outlet mechanism to control the size of a gap 1-c for spraying liquid, when the input intensity of liquid input by the nozzle is reduced, the pressure spring 4-a drives the water passing column 4 and the water outlet mechanism to reset for a certain distance to reduce the size of the gap 1-c, and when the liquid input by the nozzle is completely stopped, the nozzle is completely reset to close the gap 1-c.

The water passing column 4 and the pressure spring 4-a are sleeved with a first sleeve 61 fixed on the positioning ring piece 12-B and a second sleeve 62 fixed at the front end of the water passing column 4, the first sleeve 61 is sleeved on the second sleeve 62 in a sliding way, a plurality of O-shaped rings 6-A are arranged on the sliding contact surfaces of the first sleeve 61, the second sleeve 62 and the water passing column 4, a cylindrical structure with a front end opening 1-A and a closed rear end is formed, the pressure spring 4-a is in a sealed space and cannot be influenced by corrosion of liquid (herbicide), the cylindrical structure can correspondingly deform along with the movement of the water passing column 4 and the water outlet mechanism due to the mutual sleeving relation of the first sleeve 61 and the second sleeve 62, the O-shaped rings 6-A play a role of strengthening sealing effect, the O-shaped rings 6-A also play an important role, the O-ring 6-a of the first sleeve 61 and the O-ring 6-a of the second sleeve 62 generate friction force, and before the friction force does not exceed the maximum static sliding friction force, the first sleeve 61 and the second sleeve 62 do not generate relative displacement, and it is worth noting that in practice, during continuous spraying of liquid, the liquid input intensity of the nozzle occasionally fluctuates by a small extent, the fluctuation is caused by objective factors (such as shaking), the liquid input intensity is not actively increased or decreased, in this case, if the guide post and the water outlet mechanism move, the gap 1-c is increased or decreased, so that normal liquid spraying is affected, and therefore, the friction force generated by the O-ring 6-a of the first sleeve 61 and the second sleeve 62 can avoid the displacement of the water column 4 and the water outlet mechanism, only when the liquid input intensity is actively and obviously increased or reduced, the water passing column 4 and the water outlet mechanism can correspondingly generate displacement, so the arrangement of the first sleeve 61, the second sleeve and the O-shaped ring 6-A has the effect of maintaining the positive spraying.

The inner wall of the filter vat 3 is provided with a plurality of impurity absorbing parts 32, the impurity absorbing parts 32 can be activated carbon, preferably coconut shell activated carbon, can absorb solid particle impurities and most organic impurities in liquid, can purify and filter liquid (herbicide) on the one hand, reduce the interference of impurities on the performance of the liquid, and can filter the solid particle impurities on the other hand, can avoid the problem of nozzle blockage caused by long-term deposition, and the arrangement of the first sleeve 61, the second sleeve 62 and the O-shaped ring 6-A can seal the overpressure spring 4-a. The filter vat 3 and the inner wall of the channel 2 are provided with gaps and form an annular space, a plurality of strong magnetic pieces 33 are arranged in the annular space, the strong magnetic pieces 33 are made of high-coercivity permanent magnetic materials with magnetic field strength larger than 5000 gauss, the strong magnetic pieces 33 form magnetic lines of force, liquid flowing through the water column 4 is magnetized, impurities in the liquid can be charged to generate electric potential in the magnetizing process, the impurities become polar substances, the original electrostatic attractive force state of the impurities is changed, deposition of calcium, magnesium and the like in the liquid is prevented, soft crystals are formed to achieve a scale prevention effect, and various impurities in the liquid can be removed well by matching with the impurity absorbing piece 32.

The middle part of the front end cover 31 of the filter vat 3 is a solid area 31-A, a plurality of through holes 31-B for allowing liquid to pass through are arranged at the part between the solid area 31-A and the outer edge of the filter vat 3, the axial direction of the through holes 31-B can be inclined from front to back to the inner wall of the filter vat 3, and guided liquid can fully contact with the filter vat 3 after entering the water column 4, so that the filtering effect of impurities can be enhanced. The rear end face of the front end cover 31 of the filter vat 3 is positioned in the solid area 31-A and is provided with a guide cylinder 34 coaxial with the water passing column 4, the outer wall of the guide cylinder 34 is provided with a spiral bulge 341, the guide cylinder 34 is arranged to further improve the contact rate of liquid and the filter vat 3, the spiral bulge 341 can prolong the flow path of liquid in the water passing column 4, the contact time with the filter vat 3 is prolonged, and the two are combined to further improve the filtering effect.

Embodiment case 2:

Referring to fig. 5, the herbicide spraying device for synchronous transplanting of the rice transplanter comprises a water tank 101 containing herbicide, a water pipe 102, a plurality of nozzles 103 which are arranged in parallel on the water pipe 102 at equal intervals, and a water pump 104 for pumping the herbicide in the water tank 101 to the water pipe 102 through the pipeline, wherein the nozzles 103 are the nozzles of embodiment 1, the water tank 101 is arranged on the rice transplanter 105, the water pipe 102 is horizontally arranged below a transplanting channel 106 of the rice transplanter 105, the nozzles 103 and the transplanting channel 106 are arranged in a staggered manner, the maximum spraying ranges of the adjacent nozzles 103 are not overlapped, and the maximum spraying range of the nozzles 103 covers the transplanting points of the adjacent transplanting channel 106.

In the embodiment, the rice transplanter is a kenaf transplanter (6 rows, row spacing 30cm, plant spacing 25 cm) with VP6D model, the height of the nozzles from the ground is 20-25cm, each nozzle is fixed between every two rows of rice (the spacing of the spray heads is 30 cm), and the dosage of rice plants is reduced. The model of the water pump is a 12V air extraction type diaphragm pump, the pressure is 1.2-1.6 MPa, the power supply is 12V, the water pump can be directly connected to a storage battery of a rice transplanter, a large number of complicated and complicated circuits are avoided, the liquid spraying amount under the condition of the embodiment is 0.5L min ^-1, and the air tightness is checked after the installation is finished, so that the test is ready to be developed.

Embodiment 3:

Test point and processing method

The field test was conducted at 3 points of the laboratory of China rice institute (point A, E119 DEG 93', N30 DEG 08'), fuyang city, long mountain village of Zhejiang province (point B, E119 DEG 92', N30 DEG 09'), jiaxing city, sea salt county, huaxing farm of Zhejiang province (point C, E120 DEG 87', N30 DEG 50'). The test points A and B are sandy clay loam, the pH value is 5.98, the organic matter content is 3.10%, the soil of the test field C is sandy clay loam, the pH value is 7.10, and the organic matter content is 3.40%. The three test points are all field blocks for carrying out weed tests for many years, the weeds such as barnyard grass, special-shaped nutgrass flatsedge, crushed nutgrass flatsedge, amaranthus auriculatus, syzygium aromaticum, polygonum hydropiper and the like are various, the density is high, the damage is serious, the previous crop of each test field is single-cropping rice in the last year, and the field is idle in winter. The method comprises the steps of adopting a rice variety Jia 58 at the A point and the B point, soaking seeds in the rice variety Jia 58 at the 2019 month for 25 days, managing a seedling tray by using a conventional water fertilizer, preparing soil for 4 months for 25 days to enable a field to be smooth, carrying out a synchronous injection test in the rice variety Jia 67 at the 4 months for 28 days, soaking seeds in the rice variety Jia 67 at the 2019 month for 20 days, leveling the soil at the 6 months for 8 days, carrying out a synchronous injection test in the rice variety 10 days at the 6 months, preserving water for 0-2 cm in the rice field before mechanical transplanting, and carrying out normal water fertilizer and pest management after transplanting.

The herbicide selected by the 'synchronous spraying' is shown in the table 1, the application amount is recommended to be medium, the time required for each mu of land is 8 minutes according to the working efficiency of the rice transplanter, and the conversion application amount is 4 kg, so that the water adding amount of the herbicide per mu is 4 kg.666.7m-2. The application day of the test points A and B is a cloudy day, the wind power is level 2, the temperature is 16-24 ℃, no heavy rain occurs in 7 days after the drug administration, occasionally little rain occurs, the application day of the test point C is cloudy, the wind power is level 3, the temperature is 20-29 ℃, no heavy rain occurs in 7 days after the drug administration, and occasionally little rain occurs.

TABLE 1 selection of herbicides and treatment area

The phytotoxicity symptoms of the rice are visually investigated respectively at 7 days and 15 days after the rice is dosed, the plant height of the rice is measured at 15 days, and the yield is measured by harvesting the whole field of the harvester after the rice is thoroughly cooked. The weed control was visually observed 15 days and 30 days after the application, respectively. Data analysis and processing was performed using SAS 9.1 software. ANOVA significance analysis of variance, different lower case letters represent significant differences between treatments (P < 0.05), the same letters represent insignificant differences between treatments.

As shown in FIG. 6, the symptoms of rice phytotoxicity were visually observed 7 days and 15 days after the drug administration, and no visible phytotoxicity occurred in each treatment rice at each test point. The plant height is measured 15 days after the medicine, the plant height difference statistics of treatments 1-5 is not obvious at the test points A and B, no growth inhibition phenomenon exists, and the plant height of treatments 2 and 4 is not obviously different from that of a control at the test point C, and the plant height of treatments 1 and 3 is obviously higher than that of the control treatment, so that the herbicide product to be tested has no adverse effect on the rice growth under the precise and uniform medicine condition by adopting the 'plug-spray synchronization' technology.

As shown in FIG. 6, the control effect of weeds in paddy fields was visually observed 15 days after the application, and compared with the control (T5) treatment, weeds in paddy fields were effectively controlled, the total weed control effect of T1-T4 was 97.7% or more, and the control effect was excellent. At A, B and C test points, only extreme individual barnyard grass was found, with significant amounts of barnyard grass and duck tongue grass occurring in the control rice fields.

As shown in FIG. 7, the control effect of weeds in paddy fields was observed visually 35 days after the application, and compared with the control treatment, the control effect of weeds in paddy fields was effectively controlled, the total weed control effect of T1-T4 was 95.0% or more, and the control effect was excellent. In test points A and B, T1-T4 only found extreme individual barnyard grass, in test point C, T1-T4 only found individual barnyard grass and amaranth, and in control (T5) paddy fields barnyard grass, glossoside, nutgrass, amaranth occurred in large amounts.

The rice is sealed about 40 days after the machine transplanting, the rice growth advantage is ensured, the weed growth is inhibited, and the later-stage growth and yield formation of the rice are not affected even if the weed growth occurs. The rice yield is measured in the rice mature period, and the result of the whole field after-production measurement shows that each test point is affected by natural weeds differently, wherein the influence of the C test point control (T5) treatment is most serious, the yield is only 240 kg-667 m ², the yield loss is up to 42.7% compared with the average yield of T1-T4, the yield loss of the B test point is the least, the yield loss of the A test point is 12.5%, and the rice yield loss of the A test point is between B and C. There is no significant difference between the 4 herbicides selected, for example, T3 is highest in yield at the a and B test points and lowest at the C test point, whereas T4 is lowest at the a test point and highest at the C test point. Therefore, the rice yield field test is much affected by the environment, and the quality of each herbicide product cannot be judged.

The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and implement it without limiting the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.

Claims (7)

1. A spray nozzle is characterized by comprising a shell, wherein the shell is provided with a channel, the channel is provided with a front end opening and a rear end opening, a water passing column capable of sliding along the channel and used for passing liquid is arranged in the channel, the rear end of the water passing column is connected with a water outlet mechanism, the water outlet mechanism is used for bearing the impact of the liquid flowing through a water column and forming a gap or increasing the gap between the water outlet mechanism and the rear end opening, the liquid is sprayed out of the gap, a positioning ring piece connected with the shell is arranged in the channel, the water passing column penetrates through the positioning ring piece, a pressure spring is sleeved on the water passing column, two ends of the pressure spring are respectively connected with the positioning ring piece and the front end of the water passing column, a first sleeve fixed on the positioning ring piece and a second sleeve fixed on the front end of the water passing column are sleeved on the water passing column in a sliding mode, a plurality of O-shaped rings are arranged on the surfaces of the water outlet mechanism in a sliding mode, the water passing column cover body can be inserted in a matched mode, and the water outlet mechanism at least partially flows through the front end of the channel through the water passing column, and the front end of the water passing column cover respectively, and the front end of the water passing through the channel respectively, and at least partially flow-splitting liquid at least flow front ends of the water passing through the channel respectively.

2. The nozzle according to claim 1, wherein the rear end of the split flow body is provided with a fixed shaft coaxial with the cover body, the cover body is fixed on the fixed shaft, a rotary disk is arranged between the split flow body and the cover body, the rotary disk is rotatably sleeved on the fixed shaft, and a plurality of guide vanes which are inclined to warp threads are arranged on the front end face of the rotary disk around the circumference.

3. The nozzle of claim 1, wherein a filter barrel sleeved outside the first sleeve and the second sleeve is arranged in the channel, the rear end of the filter barrel is opened and fixed on the positioning ring, the front end cover of the filter barrel contains liquid and flows into the barrel, and a plurality of impurity absorbing parts are arranged on the inner wall of the filter barrel.

4. A nozzle according to claim 3, wherein the filter cartridge has a gap with the inner wall of the passageway and defines an annular space in which a plurality of ferromagnetic pieces are disposed.

5. A nozzle according to claim 3, wherein the middle part of the front end cover of the filter barrel is a solid area, and a plurality of through holes for liquid to pass through are arranged between the solid area and the outer edge of the filter barrel.

6. The nozzle according to claim 5, wherein a guide cylinder coaxial with the water column is arranged on the solid area of the rear end face of the front end cover of the filter barrel, and a spiral protruding portion is arranged on the outer wall of the guide cylinder.

7. A herbicide spraying device for synchronous transplanting of a transplanter, which is characterized by comprising a water tank containing herbicide, a water pipe, a plurality of nozzles which are arranged in parallel on the water pipe at equal intervals, and a water pump for pumping the herbicide in the water tank to the water pipe through a pipeline, wherein the water tank is arranged on the transplanter, the water pipe is horizontally arranged below a transplanting channel of the transplanter, the nozzles are arranged in a staggered manner with the transplanting channel, the maximum spraying ranges of adjacent nozzles are not overlapped, and the maximum spraying range of the nozzles covers transplanting points of the adjacent transplanting channels.