CN111804455B

CN111804455B - Hand-push type sprayer for paddy field

Info

Publication number: CN111804455B
Application number: CN202010463266.5A
Authority: CN
Inventors: 吴仙君
Original assignee: Taizhou Green Dragonfly Spray Ltd By Share Ltd
Current assignee: Taizhou Green Dragonfly Spray Ltd By Share Ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2021-07-16
Anticipated expiration: 2040-05-27
Also published as: CN111804455A

Abstract

The invention relates to a hand-push sprayer for paddy fields, which comprises a box body, wherein a mixing chamber and a booster pump communicated with the mixing chamber are arranged in the box body, a spraying mechanism is arranged on the surface of the box body, the output end of the booster pump is connected with the spraying mechanism, one end of the box body is a tail part, a hand-push frame is arranged on the tail part, the other end of the box body is a head part, two guide surfaces are arranged on two sides of the head part, the two guide surfaces are mutually connected together at the side edges far away from the tail part, the bottom surface of the head part is an arc-shaped surface, and the distance from the bottom surface of the head part to the top surface of. The bottom that directly adopts the box contacts with the ground in the paddy field, increases area of contact in order to prevent that the box from being absorbed in the soft earth in the paddy field, and arc bottom surface and guide face on the box head can both reduce the hindrance of uneven ground in the paddy field to the box gos forward simultaneously, and convenience of customers promotes the box and removes, reduces user's exerting oneself.

Description

Hand-push type sprayer for paddy field

Technical Field

The invention relates to the technical field of sprayers, in particular to a hand-push sprayer for paddy fields.

Background

The sprayer is an indispensable important agricultural tool for preventing and controlling plant diseases and insect pests in agriculture. The knapsack sprayer is the most widely used sprayer, but the hand-push type sprayers are gradually getting more and more because the user is required to walk on the knapsack, which causes a large pressure to the user.

At present, chinese patent with publication number CN106035301B discloses a hand-push type sprayer, which comprises a medicine box, a front wheel, a rear wheel, a spraying bracket, a spraying pipe provided with a plurality of spray heads, a hand-push bracket, a medicine pump, a battery for supplying electric energy to the medicine pump, and a controller; the front side and the rear side of the medicine box are respectively and integrally provided with a front wheel frame and a rear wheel frame for mounting front wheels and rear wheels; the spraying support, the spraying pipe, the hand-push frame, the medicine pump, the battery and the controller are all installed on the medicine chest.

Hand sprayers are basically wheel sprayers. In paddy fields, however, the soil is relatively soft due to the long-term immersion in water. If the wheel sprayer is still used for spraying liquid medicine on crops in the paddy field, the roller is easy to fall into soil in the advancing process, and a user needs to spend more labor to take out the roller, so that the normal operation is influenced.

Disclosure of Invention

In view of the disadvantages of the prior art, it is an object of the present invention to provide a push-type sprayer for paddy fields, which has the advantage of being convenient for use in paddy fields.

The above object of the present invention is achieved by the following technical solutions: the utility model provides a hand pushing-type atomizer for paddy field, includes the box, install the mixing chamber in the box and with the booster pump of mixing chamber intercommunication, the box install on the surface spray the mechanism, the output of booster pump with spray the mechanism and be connected, the one end of box is installed the hand push frame on afterbody and the afterbody, the other end of box all is equipped with two guide faces for the both sides of head and head, the side interconnect who keeps away from the afterbody is in the same place for two guide faces, the bottom surface of head is the arcwall face, the distance between the bottom surface of head to the top surface of head diminishes from the one side of being close to the afterbody to the one side of.

Through adopting above-mentioned technical scheme, the bottom that directly adopts the box contacts with the ground in the paddy field, increases area of contact in order to prevent that the box from being absorbed in soft earth in the paddy field, and arc bottom surface and guide face on the box head can both reduce the hindrance of uneven ground in the paddy field to the box gos forward simultaneously, and convenience of customers promotes the box and removes, reduces user's exerting oneself.

The present invention in a preferred example may be further configured to: the water inlet that communicates with the mixing chamber is all seted up on the both sides lateral wall of box, install the screen cloth on the water inlet, still install medicine mechanism on the box, medicine mechanism is arranged in injecting the medicament of concentration into the mixing chamber.

Through adopting above-mentioned technical scheme, the user only need carry concentrated medicament, and need not prepare the water that the diluted medicament used, in the use, directly extract in the paddy field through the filterable water of screen cloth after mix with concentrated medicament, because the box need not store a large amount of diluents, the box volume can be less relatively, more makes things convenient for the box to remove in the paddy field.

The present invention in a preferred example may be further configured to: the medicine adding mechanism comprises a driving assembly, a blocking plate, a medicine storage pipe and a base, the base is located right above the mixing chamber, a medicine adding channel communicated with the mixing chamber is formed in the base, the medicine storage pipe is installed on the base, one end of the medicine storage pipe is communicated with the medicine adding channel, the blocking plate is hinged in the medicine adding channel, and the driving assembly controls the blocking plate to block or open the medicine adding channel.

By adopting the technical scheme, after the medicine adding channel is blocked by the blocking plate, concentrated medicine is added into the medicine storage tube, the medicine is blocked onto the blocking plate along the medicine adding channel, and the driving assembly controls the blocking plate to move in the subsequent use process, so that the medicine adding channel is conducted, and the concentrated medicine is guided into the mixing chamber along the medicine adding channel to be mixed with water.

The present invention in a preferred example may be further configured to: the mixing chamber is close to the head part, and the booster pump is close to the tail part.

Through adopting above-mentioned technical scheme, because the box removes the back, the soil friction between bottom of the box and the paddy field, the silt of depositing is taken up easily in the paddy field, blocks up the screen cloth in order to reduce silt, is close to the contact opportunity of head in order to reduce with silt with the mounted position of screen cloth.

The present invention in a preferred example may be further configured to: the medicine adding channel is the echelonment, the tip that medicine adding channel inner diameter is big is first intercommunication portion, and the tip that medicine adding channel inner diameter is little is the second intercommunication portion, forms the ladder face between first intercommunication portion and the second intercommunication portion, first intercommunication portion is close to the storage medicine pipe, second intercommunication portion and mixing chamber intercommunication, install the articulated shaft on one side of interception board and articulate on the ladder face through the articulated shaft, be connected with the extension spring between the inner wall of interception board and second intercommunication portion, coaxial coupling has the gear on the articulated shaft of interception board, still rotates in the base and is connected with fan-shaped tooth, drive assembly is used for driving fan-shaped tooth's rotation.

Through adopting above-mentioned technical scheme, drive assembly can drive fan-shaped tooth all the time and rotate, and along with fan-shaped tooth rotates, fan-shaped tooth is regular with gear engagement, and fan-shaped tooth rethread gear drive intercepts the board and rotates, makes and intercepts the board and remove so that the medicament gets into the mixing chamber from the ladder face, and the medicament that adds at every turn has relatively fixed.

The present invention in a preferred example may be further configured to: the driving assembly comprises a roller, a first bevel gear, a second bevel gear and a transmission rod, blades are distributed on the circumferential side wall of the roller, the roller is rotatably connected in the box body, the roller is intercepted between the mixing chamber and the booster pump, the first bevel gear is coaxially connected with the roller, the second bevel gear is coaxially connected with the fan-shaped teeth, the transmission rod is rotatably connected in the box body, one end of the transmission rod is close to the roller, the other end of the transmission rod penetrates into the base and is close to the fan-shaped teeth, the two ends of the transmission rod are respectively and coaxially connected with a third bevel gear and a fourth bevel gear, the first bevel gear is vertically meshed with the third bevel gear, and the fourth bevel gear is vertically meshed with the second bevel gear.

Through adopting above-mentioned technical scheme, with the help of the impact force of the rivers that the mixing chamber flows to the booster pump, make the cylinder rotate, the cylinder drives fan-shaped tooth through a series of transmissions again and rotates, need not additionally to set up the driving source to according to the speed of rivers speed, the time interval between the two times addition medicaments also can corresponding adjustment, play the effect of configuration medicament in proportion.

The present invention in a preferred example may be further configured to: the two ends of the roller are respectively and fixedly connected with a rocker, the rocker is hinged with a connecting rod, the two screen meshes are respectively and slidably connected with a brush head, the middle of the brush head is connected with a sliding rod, the sliding rod is slidably connected onto the box body, and one end, away from the brush head, of the sliding rod is hinged with the connecting rod on the corresponding side.

Through adopting above-mentioned technical scheme, the roll with the help of the cylinder drives the brush head and removes, need not to set up extra driving source equally to in the course of the work, the brush head can be repeatedly cleaned the screen cloth, cleans the impurity of jam on the screen cloth, reduces the possibility that the screen cloth blockked up.

The present invention in a preferred example may be further configured to: the brush head is arranged in the mixing chamber, and two ends of the sliding rod are respectively arranged in the first cavity and the mixing chamber of the corresponding side.

Through adopting above-mentioned technical scheme, the brush head is in the mixing chamber work, and sliding connection between brush head and the screen cloth is difficult to receive the influence of impurity, and is the same, and the removal of rocker, connecting rod and slide bar is all difficult to receive the influence of external impurity, ensures that the brush head can work for a long time.

The present invention in a preferred example may be further configured to: and the inner wall of the second communicating part is provided with a vent hole communicated with the outside.

Through adopting above-mentioned technical scheme, the air vent makes the air pressure in the second intercommunication portion unanimous with external atmospheric pressure, makes the interception board can not receive the negative pressure influence, reduces the power that needs provide when the upset interception board, makes things convenient for fan-shaped tooth to drive the upset of interception board.

In summary, the invention includes at least one of the following beneficial technical effects:

the bottom of the box body is directly used for sliding in a paddy field, so that the contact area between the box body and the ground is increased, the box body is lowered to be sunk into soil, and a user can conveniently push the box body to move forwards;

the water in the paddy field is pumped by the booster pump to prepare the medicament, a water storage container does not need to be arranged in the box body, the volume of the box body is reduced, and the box body is easier to pass in the paddy field;

through setting up drive assembly, convert the impact force of rivers into the power of fan-shaped tooth and brush head, reduce the setting of driving source, further reduce the box volume.

Drawings

FIG. 1 is a schematic view of the overall structure of the embodiment;

FIG. 2 is a sectional view from a first perspective in the embodiment;

FIG. 3 is a sectional view from a second perspective in the examples;

FIG. 4 is an enlarged partial schematic view of portion A of FIG. 3;

fig. 5 is a sectional view from a third perspective in the example.

In the figure, 1, a box body; 11. a mixing chamber; 12. a first cavity; 13. a water passage; 14. a head portion; 15. a tail portion; 16. a storage chamber; 17. a third cavity; 2. a dosing mechanism; 211. a drum; 212. a first bevel gear; 213. a second bevel gear; 214. a transmission rod; 215. a third bevel gear; 216. a fourth bevel gear; 22. a interception plate; 23. a drug storage tube; 24. a base; 241. a first communicating portion; 242. a second communicating portion; 243. a second cavity; 244. a vent hole; 25. a tension spring; 26. a gear; 27. sector-shaped teeth; 3. a hand-push frame; 4. a spraying mechanism; 41. spraying a bracket; 42. a nozzle; 5. a brush head; 6. a booster pump; 7. screening a screen; 81. a rocker; 82. a connecting rod; 83. a slide bar.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the hand-push type sprayer for paddy field disclosed by the invention comprises a box body 1, wherein a hand-push frame 3, a spraying mechanism 4 and a dosing mechanism 2 are arranged on the top of the box body 1. One end of the box body 1 is a head part 14, the other end of the box body 1 is a tail part 15, the medicine adding mechanism 2 is close to the head part 14 of the box body 1, the hand push frame 3 is located at the tail part 15 of the box body 1, and the spraying mechanism 4 is close to the tail part 15 of the box body 1. Both sides of the head portion 14 are provided with two guide surfaces, the two guide surfaces are connected to each other at the sides far away from the tail portion 15, the bottom surface of the head portion 14 is an arc-shaped surface, and the distance from the bottom surface of the head portion 14 to the top surface of the head portion 14 is gradually reduced from the side near the tail portion 15 to the side far away from the bottom portion. When the water-saving box is used, the head part 14 of the box body 1 faces the advancing direction, a user pushes the box body 1 to advance through the hand push frame 3, the guide surface and the arc-shaped surface on the head part 14 can reduce the obstruction of uneven ground in a paddy field to the box body 1, and the user can push the box body 1 more easily.

Referring to fig. 2 and 3, a mixing chamber 11, a storage chamber 16, and a water passage 13 communicating the storage chamber 16 and the mixing chamber 11 are formed in the box body 1. The mixing chamber 11 is located right below the dosing mechanism 2, and the dosing mechanism 2 is used for feeding the concentrated liquid medicine into the mixing chamber 11. The storage chamber 16 is positioned right below the spraying mechanism 4, the booster pump 6 and a storage battery for providing power for the booster pump 6 are arranged in the storage chamber 16, and the output end of the booster pump 6 is connected with the spraying mechanism 4. The lateral walls of the two sides of the mixing chamber 11 are both provided with water inlets communicated with the outside, and the water inlets are provided with screen meshes 7.

Referring to fig. 1 and 2, the spraying mechanism 4 includes a spraying bracket 41 fixed on the box body 1, and two spray pipes 42 hinged on the top of the spraying bracket 41, and a buckle for clamping the spray pipes 42 is installed on the top of the spraying bracket 41. A plurality of spray heads are uniformly installed on the spray pipe 42 in the length direction. The two spray pipes 42 are respectively communicated with the output ends of the booster pumps 6 through hoses. When the spout 42 is snapped into the snap, the two spouts 42 are horizontally parallel to each other, and after the spouts 42 are removed from the snap, the spouts 42 can be flipped down to reduce the overall volume of the sprayer.

Referring to fig. 2 and 3, the dosing mechanism 2 includes a driving assembly, a blocking plate 22, a drug storage tube 23 and a base 24, the base 24 is located right above the mixing chamber 11, and a dosing channel communicated with the mixing chamber 11 is provided on the base 24, the dosing channel is obliquely arranged, and one end of the dosing channel far away from the mixing chamber 11 is close to the tail 15 of the box body 1. The medicine storage tube 23 is arranged in a hollow manner, the medicine storage tube 23 is arranged vertically and is mounted on the base 24, and the hollow cavity of the medicine storage tube 23 is communicated with the medicine feeding channel. The medicine feeding channel is in a step shape, the end portion with the large inner diameter of the medicine feeding channel is a first communicating portion 241, the end portion with the small inner diameter of the medicine feeding channel is a second communicating portion 242, a step face is formed between the first communicating portion 241 and the second communicating portion 242, the first communicating portion 241 is communicated with the hollow cavity of the medicine storage tube 23, the second communicating portion 242 is communicated with the mixing chamber 11, the inner wall of the second communicating portion 242 is provided with a vent hole 244 communicated with the outside, and the vent hole 244 is located on the side wall, close to the head portion 14, of the base 24. A hinge shaft is installed at one side of the interception plate 22 and is hinged on the stepped surface through the hinge shaft, and a tension spring 25 is connected between the interception plate 22 and the inner wall of the second communication part 242. The blocking plate 22 is covered by the tension spring 25 so as to closely contact the stepped surface and block the communication between the first communicating portion 241 and the second communicating portion 242. Referring to fig. 4, the base 24 is further provided with two second cavities 243, the two second cavities 243 are respectively located at two sides of the drug feeding channel, two ends of the hinge shaft of the interception plate 22 respectively penetrate into the two second cavities 243, the end of the hinge shaft located in the second cavities 243 is coaxially connected with the gear 26, and the inner wall of the second cavity 243 is rotatably connected with the sector gear 27. The driving assembly is used for driving the two sector-shaped teeth 27 to rotate synchronously, and during one complete rotation of the sector-shaped teeth 27, the sector-shaped teeth 27 are meshed with the gear 26 and drive the gear 26 to rotate, and the gear 26 drives the interception plate 22 to turn towards the side far away from the head 14. When the sector gear 27 is disengaged from the gear 26, the interceptor plate 22 is again covered on the step surface by the tension spring 25.

Referring to fig. 3 and 4, two third cavities 17 respectively located at two sides of the water passage 13 are further formed in the box body 1. Two third cavities 17 are in one-to-one correspondence with the second cavities 243, the third cavities 17 being directly below the corresponding second cavities 243. The drive assembly comprises a drum 211, two first bevel gears 212, two second bevel gears 213 and two transmission rods 214. The drum 211 is rotatably coupled to the inner wall of the water passage 13 and the drum 211 is laterally intercepted between the mixing chamber 11 and the booster pump 6. Blades are distributed on the circumferential side wall of the roller 211, and along with the flow of water flowing to the booster pump 6 from the mixing chamber 11, the water flow impacts the blades and drives the roller 211 to rotate. Two ends of the roller 211 penetrate into the two third cavities 17 respectively, and two first bevel gears 212 are located in the two third cavities 17 respectively and are coaxially connected with the roller 211. Two second bevel gears 213 are coaxially connected to the two sector teeth 27, respectively. The two transmission rods 214 are both vertically arranged and rotatably connected in the box body 1. The two ends of the transmission rod 214 are respectively positioned in the third cavity 17 and the corresponding second cavity 243, and the two ends of the transmission rod 214 are respectively coaxially connected with a third bevel gear 215 and a fourth bevel gear 216, the first bevel gear 212 and the third bevel gear 215 are vertically meshed with each other, and the fourth bevel gear 216 and the second bevel gear 213 are vertically meshed with each other.

Referring to fig. 3 and 5, two first cavities 12 respectively located at two sides of the water passage 13 are further opened in the case 1, and the first cavities 12 are farther from the drum 211 than the third cavities 17 at the corresponding sides. The two ends of the roller 211 extend continuously and penetrate into the two first cavities 12 respectively, a rocker 81 is fixedly connected to the end, located in the first cavity 12, of the roller 211, and a connecting rod 82 is hinged to the end, located away from the first cavity 12, of the rocker 81. The two screens 7 are connected with the brush head 5 in a sliding mode, the middle of the brush head 5 is fixed with the sliding rod 83, the sliding rod 83 is connected to the box body 1 in a sliding mode, and one end, far away from the brush head 5, of the sliding rod 83 penetrates into the first cavity 12 of the corresponding side and is hinged to the connecting rod 82 of the corresponding side. The brush head 5 and the sliding rod 83 slide in the same direction, and the sliding rod 83 and the brush head 5 move back and forth between the head 14 and the head 14 by the transmission of the rocker 81 and the connecting rod 82 along with the rotation of the roller 211.

The implementation principle of the embodiment is as follows: when the water-saving device is used in a paddy field, a user puts the box body 1 into water firstly, so that the water flows into the mixing chamber 11, the water passage 13 and the storage chamber in sequence, and the booster pump 6 is soaked with the water. Then, the user horizontally expands the spray pipe 42 and fixes the spray pipe, the booster pump 6 is started after the concentrated liquid medicine is filled into the medicine storage pipe 23, the booster pump 6 pumps water to the mixing chamber 11, the water is pressurized and then is transmitted to the spray pipe 42, and the pressurized water is sprayed out through a nozzle on the spray pipe 42. As water in the paddy field is continuously sucked into the mixing chamber 11 and then flows into the booster pump 6 from the mixing chamber 11, the water flow impacts the roller to rotate the roller. The transmission rod 214 is driven to rotate by the cooperation of the first bevel gear 212 and the second bevel gear 213 on one side of the roller 211, the sector-shaped teeth 27 are driven to rotate by the cooperation of the third bevel gear 215 and the fourth bevel gear 216 through the transmission rod 214, the sector-shaped teeth 27 drive the interception plate 22 to turn over at intervals in the rotation process, each time the interception plate 22 leaves the step surface, part of concentrated liquid medicine enters the mixing chamber 11 and is mixed with water to form medicine with proper concentration, and the medicine is finally sprayed out of the nozzle to irrigate crops in the paddy field. Meanwhile, the roller 211 drives the brush head 5 to repeatedly clean the screen 7 through the matching of the rocker 81 and the connecting rod 82, so that the blockage of the screen 7 by impurities in a paddy field is reduced, and the water inflow of the booster pump 6 is ensured. The user pushes the sprayer to move forward, and the pesticide spraying to crops can be realized.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a hand push type atomizer for paddy field, includes box (1), its characterized in that: the automatic spraying device is characterized in that a mixing chamber (11) and a booster pump (6) communicated with the mixing chamber (11) are installed in the box body (1), a spraying mechanism (4) is installed on the surface of the box body (1), the output end of the booster pump (6) is connected with the spraying mechanism (4), one end of the box body (1) is a tail portion (15), a hand-push frame (3) is installed on the tail portion (15), the other end of the box body (1) is a head portion (14), two guide surfaces are arranged on two sides of the head portion (14), the two guide surfaces are far away from the side edges of the tail portion (15) and are mutually connected, the bottom surface of the head portion (14) is an arc-shaped surface, and the distance from the bottom surface of the head portion (14) to the top surface of the head portion (14) is gradually;

the side walls of two sides of the box body (1) are respectively provided with a water inlet communicated with the mixing chamber (11), the water inlet is provided with a screen (7), the box body (1) is also provided with a dosing mechanism (2), and the dosing mechanism (2) is used for injecting concentrated medicaments into the mixing chamber (11);

the medicine adding mechanism (2) comprises a driving assembly, a blocking plate (22), a medicine storage pipe (23) and a base (24), the base (24) is located right above the mixing chamber (11), a medicine adding channel communicated with the mixing chamber (11) is formed in the base (24), the medicine storage pipe (23) is installed on the base (24), one end of the medicine storage pipe (23) is communicated with the medicine adding channel, the blocking plate (22) is hinged in the medicine adding channel, and the driving assembly controls the blocking plate (22) to block or open the medicine adding channel;

the medicine feeding channel is in a step shape, the end part with the large inner diameter of the medicine feeding channel is a first communicating part (241), the end part with the small inner diameter of the medicine feeding channel is a second communicating part (242), a step surface is formed between the first communicating part (241) and the second communicating part (242), the first communicating part (241) is close to the medicine storage pipe (23), the second communicating part (242) is communicated with the mixing chamber (11), a hinged shaft is installed on one side of the intercepting plate (22) and hinged to the step surface through the hinged shaft, a tension spring (25) is connected between the intercepting plate (22) and the inner wall of the second communicating part (242), a gear (26) is coaxially connected to the hinged shaft of the intercepting plate (22), a fan-shaped tooth (27) is further rotatably connected to the inside of the base (24), and the driving assembly is used for driving the fan-shaped tooth (27) to rotate;

the driving assembly comprises a roller (211), a first bevel gear (212), a second bevel gear (213) and a transmission rod (214), blades are distributed on the circumferential side wall of the roller (211), the roller (211) is rotatably connected in the box body (1) and the roller (211) is intercepted between the mixing chamber (11) and the booster pump (6), the first bevel gear (212) is coaxially connected with the roller (211), the second bevel gear (213) is coaxially connected with the fan-shaped teeth (27), the transmission rod (214) is rotatably connected in the box body (1), one end of the transmission rod (214) is close to the roller (211), the other end of the transmission rod (214) penetrates into the base (24) and is close to the fan-shaped teeth (27), the two ends of the transmission rod (214) are respectively and coaxially connected with a third bevel gear (215) and a fourth bevel gear (216), and the first bevel gear (212) and the third bevel gear (215) are mutually vertically meshed, and the fourth bevel gear (216) and the second bevel gear (213) are vertically engaged with each other.

2. A hand-push sprayer for paddy field according to claim 1, wherein: the mixing chamber (11) is close to the head (14), and the booster pump (6) is close to the tail (15).

3. A hand-push sprayer for paddy field according to claim 1, wherein: the two ends of the roller (211) are fixedly connected with rocking rods (81) respectively, the rocking rods (81) are hinged with connecting rods (82), the two screen meshes (7) are connected with the brush head (5) in a sliding mode, the middle of the brush head (5) is connected with sliding rods (83), the sliding rods (83) are connected to the box body (1) in a sliding mode, and one end, away from the brush head (5), of each sliding rod (83) is hinged with the corresponding connecting rod (82).

4. A hand-push sprayer for paddy fields as claimed in claim 3, wherein: two first cavities (12) respectively positioned at two sides of the roller (211) are further formed in the box body (1), the rocker (81) and the connecting rod (82) are positioned in the first cavities (12) at the corresponding sides, the brush head (5) is positioned in the mixing chamber (11), and two ends of the sliding rod (83) are respectively positioned in the first cavities (12) and the mixing chamber (11) at the corresponding sides.

5. A hand-push sprayer for paddy field according to claim 1, wherein: the inner wall of the second communication part (242) is provided with a vent hole (244) communicated with the outside.