CN105289863A - Tangential centrifugal agricultural sprayer nozzle with two spraying hole sheets - Google Patents

Abstract

The invention discloses a tangential centrifugal agricultural sprayer nozzle with two spraying hole sheets. The tangential centrifugal agricultural sprayer nozzle comprises a liquid inflow pipe joint and a nozzle body, wherein the liquid inflow pipe joint is provided with a liquid inflow channel. The liquid inflow pipe joint is tangentially connected with the nozzle body. The liquid inflow channel is tangential to an inner cavity of the nozzle body. The two spraying hole sheets are installed in a spraying cavity of the nozzle body and divide the spraying cavity into a flow mixing chamber and an eddy chamber. The two-spraying-hole-sheet structure is adopted, a traditional spraying cavity is divided into the eddy chamber and the flow mixing chamber, high-speed pesticide liquid is buffered in the eddy chamber and then sprayed out through the flow mixing chamber, the pressure of the pesticide liquid and the speed of mist drops are reduced, the spraying diameter is increased, the drifting phenomena can be effectively reduced, and harm caused by pesticide drifting to the ecological environment and human health is reduced. The nozzle is compact in structure, reliable in work, convenient to detach and install, suitable for manual sprayers and various self-propelled pesticide spraying machines, extremely high in economical efficiency and practicality and high in application and popularization value.

Description

A tangential centrifugal agricultural sprayer nozzle with double nozzle holes

technical field

The invention belongs to the technical field of agricultural spraying devices, and in particular relates to a tangential centrifugal agricultural sprayer nozzle with double nozzle holes.

Background technique

Spray drift is one of the important causes of agricultural environmental pollution in my country. The most direct and effective way to solve spray drift is to improve the anti-drift performance of the atomization part, that is, the nozzle. The knapsack sprayer is the most widely used chemical pesticide spraying device in my country, and the tangential centrifugal nozzle is the most important working part of the knapsack sprayer, and its anti-drift ability directly affects the amount of pesticide drift. Domestic and foreign studies have shown that when the diameter of spray droplets is less than 150 μm, the spray droplets are prone to drift. At present, the structure of ordinary tangential centrifugal nozzles in my country is relatively simple, and the types are relatively single. They mainly produce fine droplets with a droplet diameter of 100-200 μm, and the amount of droplets that are prone to drift accounts for 30-30% of the total spray volume above 50. A large number of pesticides drift into the atmosphere, pollute water sources and soil, and cause great harm to the ecological environment and human health. Therefore, it is an objective need to develop a tangential centrifugal agricultural sprayer nozzle that can improve the spray droplet diameter and effectively reduce pesticide drift by changing the nozzle structure.

Contents of the invention

The object of the present invention is to provide a tangential centrifugal agricultural sprayer nozzle capable of improving the spray droplet diameter and effectively reducing pesticide drift.

The object of the present invention is achieved in this way, comprising a liquid inlet pipe joint and a nozzle body provided with a liquid inlet channel, the liquid inlet pipe joint is tangentially connected with the nozzle body, and the liquid inlet channel is tangent to the inner cavity of the nozzle body; The open end of the body is equipped with a nozzle cap, and the outer end of the nozzle cap is equipped with a second orifice sheet, and a plurality of spray holes are processed on the second orifice sheet, and the nozzle body, the nozzle cap and the second orifice sheet form a spray chamber , the spray chamber is provided with a first spray hole sheet, the first spray hole sheet divides the spray chamber into a mixed flow chamber and a vortex chamber, and the center of the first spray hole sheet is processed with a main spray hole.

Further, the nozzle cap includes a small cylinder and a large cylinder, the inner wall of the open end of the small cylinder is processed with a second sealing surface, the inner wall of the connection between the small cylinder and the large cylinder is processed with a first sealing surface, the upper part of the outer wall of the nozzle is processed with external threads, and the large cylinder The inner wall is processed with an internal thread that matches the outer wall of the nozzle; the first orifice plate is installed on the first sealing surface, the second orifice plate is installed on the second sealing surface, and the first orifice plate is installed on the end surface of the nozzle body. As for the gasket, a gasket ring is installed between the second orifice sheet and the first orifice sheet.

Further, the nozzle cap includes a small cylinder and a large cylinder, the first orifice plate is fixedly connected to the end of the small cylinder, the upper part of the outer wall of the nozzle is processed with external threads, and the inner wall of the large cylinder is processed with internal threads that match the outer wall of the nozzle; the large cylinder is connected with the outer wall of the nozzle. A first sealing surface is processed on the inner wall of the bottom of the connecting side of the small tube, the first nozzle hole plate is installed on the first sealing surface, a gasket 5 is installed between the first nozzle hole plate and the end surface of the nozzle body, and the large tube and the small tube are threaded. .

Further, the center of the vortex chamber is provided with a nozzle core, the nozzle core is a truncated cone with the big end facing down, and the center of the top of the truncated cone is aligned with the main nozzle hole. A flow deflector concentric with the nozzle core is installed on the upper side of the nozzle core. A liner is installed on the inner wall of the nozzle, and the flow deflector is fixedly installed on the liner through ribs. The outer wall of the nozzle core is processed with spiral grooves. The cross-section of the spiral groove can be groove-shaped, V-shaped or semi-circular.

Further, when the liquid inlet pipe joint is installed with the nozzle body, the included angle between the center line of the liquid inlet pipe joint and the cross section of the nozzle body is 0-5 degrees.

The present invention divides the traditional spray chamber into a vortex chamber and a mixing chamber by adopting a double-orifice sheet structure, and the high-speed medicinal liquid can be buffered in the vortex chamber and sprayed out through the mixing chamber, the pressure of the medicinal liquid is reduced, and the velocity of the droplets is slowed down. The resulting increased spray diameter can effectively reduce drift and reduce the harm caused by pesticide drift to the ecological environment and human health. Moreover, the nozzle has compact structure, reliable operation, and convenient disassembly and assembly. It can be applied to manual sprayers and various self-propelled spraying machines.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

FIG. 2 is a schematic diagram of the overall structure of Embodiment 2 of the present invention;

FIG. 3 is a schematic diagram of the overall structure of Embodiment 3 of the present invention;

In the figure: 1-inlet pipe joint, 2-inlet channel, 3-nozzle body, 4-nozzle cap, 41-second sealing surface, 42-small cylinder, 43-first sealing surface, 44-big cylinder, 5 -Gasket, 6-first orifice sheet, 7-gasket ring, 8-second orifice sheet, 9-spray orifice, 10-mixing chamber, 11-main orifice, 12-vortex chamber, 13-nozzle core , 14-shroud, 15-rib, 16-liner, 17-spiral groove.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or improvements made based on the teaching of the present invention belong to the protection scope of the present invention.

Example 1:

As shown in Fig. 1, a kind of tangential centrifugal agricultural sprayer head of double orifice sheet according to the present invention comprises the liquid inlet pipe connector 1 and the nozzle body 3 that are provided with liquid inlet passage 2, and described liquid inlet pipe connector 1 Tangentially connected to the nozzle body 3, the liquid inlet channel 2 is tangent to the inner cavity of the nozzle body 3; the nozzle cap 4 is installed on the open end of the nozzle body 3, and the second nozzle hole plate 8 is installed on the outer end of the nozzle cap 4 , a plurality of spray holes 9 are processed on the second spray hole sheet 8, the aperture of the spray holes 9 is generally 0.2-2mm, and the number of spray holes 9 is 2-50, which are evenly distributed in the second spray hole according to the flow rate. The spray hole plate 8 is sufficient; the spray head body 3, the spray head cap 4 and the second spray hole plate 8 form a spray cavity, and the first spray hole plate 6 is arranged in the spray cavity, and the first spray hole plate 6 divides the spray cavity into a mixed flow The chamber 10 and the vortex chamber 12, the center of the first orifice plate 6 are processed with a main nozzle hole 11, and the diameter of the main nozzle hole 11 is generally 1-6 mm. The nozzle cap 4 includes a small tube 42 and a large tube 44, the inner wall of the open end of the small tube 42 is processed with a second sealing surface 41, the inner wall of the connection between the small tube 42 and the large tube 44 is processed with a first sealing surface 43, and the upper part of the outer wall of the nozzle body 3 It is processed with external threads, and the inner wall of the large cylinder 44 is processed with internal threads that match the outer wall of the nozzle body 3; the first nozzle hole sheet 6 is installed on the first sealing surface 43, and the second nozzle hole sheet 8 is installed on the second sealing surface 41. A washer 5 is installed between the first orifice plate 6 and the end surface of the nozzle body 3 , and a washer 7 is installed between the second orifice plate 8 and the first orifice plate 6 . The center of the vortex chamber 12 is provided with a nozzle core 13, the nozzle core 13 is a truncated cone with the big end facing down, and the center of the top of the truncated cone is aligned with the main nozzle hole 11.

When working, the medicine liquid enters the liquid inlet channel 2 from the liquid inlet pipe joint 1 under the action of the pressure of the sprayer, and the high-speed liquid flow enters the vortex chamber 12 along the ramp and tangentially, and spirals around the conical nozzle core 13 at high speed. When approaching the first orifice plate 6 , the radius of rotation decreases and the flow speed increases, and the spray is scattered into the mixing chamber 10 from the main orifice 11 in the center of the first orifice plate 6 in a cone shape. Due to the large volume of the mixed-flow chamber 10, the pressure of the liquid medicine decreases, and the speed of the droplets slows down. The fine droplets collide with each other and condense into droplets with a larger diameter. out and attach to crops.

Example 2:

As shown in Figure 2, a tangential centrifugal agricultural sprayer nozzle with double orifice sheets according to the present invention includes a liquid inlet pipe joint 1 and a nozzle body 3 provided with a liquid inlet channel 2, and is characterized in that: the inlet The liquid pipe joint 1 is connected tangentially to the nozzle body 3, and the liquid inlet channel 2 is tangent to the inner cavity of the nozzle body 3; a nozzle cap 4 is installed on the open end of the nozzle body 3, and a second Orifice plate 8, a plurality of spray holes 9 are processed on the second orifice plate 8, the nozzle body 3, the nozzle cap 4 and the second orifice plate 8 form a spray cavity, and the first orifice plate 6 is arranged in the spray cavity. The first orifice plate 6 divides the spray chamber into a mixing chamber 10 and a vortex chamber 12 , and a main orifice 11 is processed in the center of the first orifice plate 6 . The nozzle cap 4 includes a small tube 42 and a large tube 44. The first orifice plate 6 is fixedly connected to the end of the small tube 42. The upper part of the outer wall of the nozzle body 3 is processed with external threads, and the inner wall of the large tube 44 is processed with a thread that matches the outer wall of the nozzle body 3. Internal thread; the inner wall of the bottom of the large cylinder 44 and the small cylinder 42 is processed with a first sealing surface 43, the first nozzle hole plate 6 is installed on the first sealing surface 43, and the first nozzle hole piece 6 is installed between the end surface of the nozzle body 3 Gasket 5 is arranged, and the large tube 44 and the small tube 42 are threaded. The center of the vortex chamber 12 is provided with a nozzle core 13, the nozzle core 13 is a truncated cone with the big end facing down, and the center of the top of the truncated cone is aligned with the main nozzle hole 11.

When working, the medicine liquid enters the liquid inlet channel 2 from the liquid inlet pipe joint 1 under the action of the pressure of the sprayer, and the high-speed liquid flow enters the vortex chamber 12 along the ramp and tangentially, and spirals around the conical nozzle core 13 at high speed. When approaching the first orifice plate 6 , the radius of rotation decreases and the flow speed increases, and the spray is scattered into the mixing chamber 10 from the main orifice 11 in the center of the first orifice plate 6 in a cone shape. Due to the large volume of the mixed-flow chamber 10, the pressure of the liquid medicine decreases, and the speed of the droplets slows down. The fine droplets collide with each other and condense into droplets with a larger diameter. out and attach to crops.

Example 3:

As shown in Fig. 3, a kind of tangential centrifugal agricultural sprayer nozzle of double orifice sheet according to the present invention comprises the liquid inlet pipe connector 1 and the nozzle body 3 that are provided with liquid inlet channel 2, and described inlet pipe connector 1 Tangentially connected to the nozzle body 3, the liquid inlet channel 2 is tangent to the inner cavity of the nozzle body 3; the nozzle cap 4 is installed on the open end of the nozzle body 3, and the second nozzle hole plate 8 is installed on the outer end of the nozzle cap 4 , a plurality of spray holes 9 are processed on the second orifice sheet 8, the nozzle body 3, the nozzle cap 4 and the second orifice sheet 8 form a spray cavity, the first orifice sheet 6 is arranged in the spray cavity, the first orifice The sheet 6 divides the spray chamber into a mixed flow chamber 10 and a vortex chamber 12 , and the center of the first spray hole sheet 6 is processed with a main spray hole 11 . The nozzle cap 4 includes a small tube 42 and a large tube 44, the inner wall of the open end of the small tube 42 is processed with a second sealing surface 41, the inner wall of the connection between the small tube 42 and the large tube 44 is processed with a first sealing surface 43, and the upper part of the outer wall of the nozzle body 3 It is processed with external threads, and the inner wall of the large cylinder 44 is processed with internal threads that match the outer wall of the nozzle body 3; the first nozzle hole sheet 6 is installed on the first sealing surface 43, and the second nozzle hole sheet 8 is installed on the second sealing surface 41. A washer 5 is installed between the first orifice plate 6 and the end surface of the nozzle body 3 , and a washer 7 is installed between the second orifice plate 8 and the first orifice plate 6 . The center of the vortex chamber 12 is provided with a nozzle core 13, the nozzle core 13 is a truncated cone with the big end facing down, and the center of the top of the truncated cone is aligned with the main nozzle hole 11. A flow guide cover 14 concentric with the nozzle core 13 is installed on the upper side of the nozzle core 13 . A liner 16 is installed on the inner wall of the nozzle body 3 , and the flow deflector 14 is fixedly installed on the liner 16 through ribs 15 . The outer wall of the nozzle core 13 is processed with a spiral groove 17 . The cross section of the spiral groove 17 can be a groove shape, a V shape or a semicircle shape. When the liquid inlet pipe joint 1 and the nozzle body 3 are installed, the included angle between the center line of the liquid inlet pipe joint 1 and the cross section of the nozzle body 3 is 0-5 degrees.

When working, the medicine liquid enters the liquid inlet channel 2 from the liquid inlet pipe joint 1 under the action of the pressure of the sprayer, and the high-speed liquid flow enters the vortex chamber 12 along the ramp and tangentially, and spirals around the conical nozzle core 13 at high speed. When approaching the first orifice plate 6 , the radius of rotation decreases and the flow speed increases, and the spray is scattered into the mixing chamber 10 from the main orifice 11 in the center of the first orifice plate 6 in a cone shape. The deflector 14 can effectively promote the liquid medicine from the vortex chamber 12 into the mixed flow chamber 10; the spiral groove 17 can help form a stable swirl flow, and promote the liquid medicine to enter the mixed flow chamber 10 from the vortex chamber 12; the inclined setting of the inlet pipe joint 1, The liquid flow in the vortex chamber 12 can also be further promoted to form a better vortex effect. Due to the large volume of the mixed-flow chamber 10, the pressure of the liquid medicine decreases, and the speed of the droplets slows down. The fine droplets collide with each other and condense into droplets with a larger diameter. out and attach to crops. Due to the increase of the spray diameter, the drift can be effectively reduced, and the harm caused by the drift of pesticides to the ecological environment and human health can be reduced. In addition, the invention has compact structure, reliable operation, high economy and practicality.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (9)

1. the tangential centrifugal farm mister head of a two spray nozzle sheet, comprise the feed tube joint (1) and sprayer body (3) that are provided with feed pathway (2), it is characterized in that: described feed tube joint (1) is tangentially connected with sprayer body (3), feed pathway (2) is tangent with the inner chamber of sprayer body (3); The opening end of sprayer body (3) is provided with sprinkler cap (4), the outboard end of sprinkler cap (4) is provided with the second spray nozzle sheet (8), the multiple loose spray orifice (9) of the upper processing of second spray nozzle sheet (8), sprayer body (3), sprinkler cap (4) and the second spray nozzle sheet (8) composition spray chamber, the first spray nozzle sheet (6) is provided with in spray chamber, spray chamber is separated into mixed flow room (10) and minor air cell (12) by the first spray nozzle sheet (6), and the center of the first spray nozzle sheet (6) is processed with main jet hole (11).

2. the tangential centrifugal farm mister head of a kind of pair of spray nozzle sheet according to claim 1, it is characterized in that: described sprinkler cap (4) comprises little cylinder (42) and large cylinder (44), little cylinder (42) opening end inwall is processed with secondary sealing area (41), little cylinder (42) and large cylinder (44) junction inwall are processed with primary sealing area (43), sprayer body (3) outer wall epimere is processed with external screw thread, and large cylinder (44) inwall is processed with the internal thread coordinated with sprayer body (3) outer wall; First spray nozzle sheet (6) is arranged on primary sealing area (43), second spray nozzle sheet (8) is arranged on secondary sealing area (41), packing ring (5) is installed between the first spray nozzle sheet (6) and sprayer body (3) end face, gasket ring (7) is installed between the second spray nozzle sheet (8) and the first spray nozzle sheet (6).

3. the tangential centrifugal farm mister head of a kind of pair of spray nozzle sheet according to claim 1, it is characterized in that: described sprinkler cap (4) comprises little cylinder (42) and large cylinder (44), first spray nozzle sheet (6) is connected with little cylinder (42) end winding support, sprayer body (3) outer wall epimere is processed with external screw thread, and large cylinder (44) inwall is processed with the internal thread coordinated with sprayer body (3) outer wall; Large cylinder (44) and little cylinder (42) connection side bottom interior wall are processed with primary sealing area (43), first spray nozzle sheet (6) is arranged on primary sealing area (43), packing ring (5) is installed, for being threaded between large cylinder (44) with little cylinder (42) between the first spray nozzle sheet (6) and sprayer body (3) end face.

4. according to the tangential centrifugal farm mister head of a kind of pair of spray nozzle sheet in claims 1 to 3 described in any 1, it is characterized in that: the center of described minor air cell (12) is provided with sprinkler core (13), sprinkler core (13) is the large end frustum of a cone down, and frustum of a cone top center and main jet hole (11) align.

5. the tangential centrifugal farm mister head of a kind of pair of spray nozzle sheet according to claim 4, is characterized in that: be provided with the kuppe (14) concentric with sprinkler core (13) in the upside of sprinkler core (13).

6. the tangential centrifugal farm mister head of a kind of pair of spray nozzle sheet according to claim 5, it is characterized in that: described sprayer body (3) inwall is provided with lining (16), kuppe (14) is fixedly mounted on lining (16) by gusset (15).

7. the tangential centrifugal farm mister head of a kind of pair of spray nozzle sheet according to claim 4, is characterized in that: the outer wall of described sprinkler core (13) is processed with helicla flute (17).

8. the tangential centrifugal farm mister head of a kind of pair of spray nozzle sheet according to claim 7, is characterized in that: the cross section of described helicla flute (17) can be grooved, V-type or semi-circular.

9. according to the tangential centrifugal farm mister head of a kind of pair of spray nozzle sheet in claims 1 to 3 described in any 1, it is characterized in that: when described feed tube joint (1) and sprayer body (3) are installed, the angle between feed tube joint (1) center line and sprayer body (3) cross section is 0 ~ 5 degree.