CN105080743A - Secondary nozzle device of sprinkling irrigation nozzle - Google Patents

Abstract

The invention discloses a sub-nozzle device of a sprinkler nozzle, which comprises a sub-nozzle shell, an adjusting spring, an inner core of the sub-nozzle, a limiting sleeve and a sealing ring. The inner core of the auxiliary nozzle is set on the inner side of the auxiliary nozzle shell. The inner core of the auxiliary nozzle and the auxiliary nozzle shell are installed concentrically. An adjustment spring is set between the inner core of the auxiliary nozzle and the auxiliary nozzle shell. The inner side of the nozzle housing is used to limit the inner core of the auxiliary nozzle, and the sealing ring is set in the sealing groove on the inner core of the auxiliary nozzle to realize the sealing when the second tapered section and the fourth tapered section are fitted together. The second outlet hole is processed on the auxiliary nozzle shell, and the first outlet hole is processed on the inner core of the auxiliary nozzle; when the nozzle is working at low pressure, the first outlet hole and the second outlet hole spray at the same time, when the nozzle pressure When it increases to a certain value, only the first sub-nozzle runner sprays.

Description

Sprinkler nozzle device

technical field

The invention relates to the field of fluid machinery, in particular to an auxiliary nozzle device of a sprinkler head.

Background technique

The sprinkler head is one of the key equipment for sprinkler irrigation, and reducing the rated working pressure of the sprinkler head is an important way to save energy and reduce consumption in the sprinkler irrigation system. However, when the working pressure of the sprinkler head is reduced, the uniformity of sprinkler irrigation will usually be reduced. Therefore, improving the low-pressure hydraulic performance of the sprinkler head has always been one of the difficulties in the design of the sprinkler head. Adopting the main and auxiliary nozzle structure is an important measure to improve the hydraulic performance of the nozzle. Chinese Patent No. CN2401024Y discloses "a rotating nozzle", and a three-nozzle rocker nozzle is designed. In addition to the second nozzle, the first The tube wall of the two-nozzle spray pipe is also provided with fan-shaped jet refraction sub-nozzles, or common sub-nozzles and water-dispersing impellers are housed. Chinese patent No. CN201930871U discloses "a rocker nozzle with a secondary nozzle". On the outer wall of the secondary nozzle nozzle, there is a through chute along the axis of the orifice. Part of the jet is sprayed through the chute and scattered on the nozzle rod. Nearby, the water distribution at the near range of the nozzle is improved. In addition, the chute can disturb the water flow sprayed by the sub-nozzle and improve the dissipation effect of the sub-nozzle. Chinese Patent No. CN102513238B discloses "a sub-nozzle of a variable spraying rotary spray head". The sub-nozzle thin cover is provided above the sub-nozzle outlet, and the sub-nozzle thin cover is connected with the sub-nozzle. The angle can be bent to adjust the angle between the thin cover plate of the auxiliary nozzle and the axial direction of the auxiliary nozzle. The bottom outlet of the auxiliary nozzle is provided with two water diversion channels with different inclinations, so that the water can be sprayed along different directions of the flow channels. External to improve the uniformity of water distribution in the nozzle.

Although the existing auxiliary nozzles have different structures, they have one thing in common, that is, the outlet form of the auxiliary nozzle is fixed. With the decrease of the working pressure of the nozzle, the water flow sprayed by the nozzle with the same outlet form will inevitably reduce its dissipation effect. It often leads to a decline in the uniformity of the water distribution of the nozzle, so the existing sub-nozzle structure has limited effect on improving the water distribution of the sprinkler nozzle under low pressure conditions, and has no obvious effect on reducing the working pressure of the nozzle.

Aiming at the deficiencies in the prior art, the present invention proposes a secondary nozzle device whose nozzle outlet style changes with the working pressure, so as to improve the uniformity of sprinkling irrigation of the sprinkler head under low pressure.

Contents of the invention

Aiming at the deficiencies in the prior art, the present invention provides an auxiliary nozzle device for a sprinkler head whose outlet style of the nozzle can change with the working pressure.

The present invention achieves the above-mentioned technical purpose through the following technical means.

A sub-nozzle device for a sprinkler nozzle, the sub-nozzle device 1 is installed on the elbow 2 of the sprinkler head, and includes a sub-nozzle housing 11, a sub-nozzle inner core 13 and a stop sleeve 14; the sub-nozzle housing 11 has a guide The hole 111 and the second outlet hole 115; the limiting sleeve 14 is provided with a secondary diversion hole 141 and a main diversion hole 142, and the limiting sleeve 14 is fixedly connected in the inner cavity of the secondary nozzle housing 11 through threads; The auxiliary nozzle inner core 13 is movably fitted in the inner cavity of the first auxiliary nozzle 11, one end of the auxiliary nozzle inner core 13 is inserted into the guide hole 111 of the auxiliary nozzle housing 11, and the other end abuts against the limiting sleeve 14 , the limiting sleeve is used to adjust the position of the auxiliary nozzle inner core 13 in the auxiliary nozzle housing 11; the main guide hole 142 of the limiting sleeve 14 and the guide hole of the auxiliary nozzle inner core 13 form a first spray channel; The secondary guide hole 141 of the limiting sleeve 14 , the gap between the secondary nozzle housing 11 and the secondary nozzle inner core 13 and the second outlet hole 115 of the secondary nozzle housing 11 form a second spraying channel.

Further, the inner wall of the secondary nozzle housing 11 includes a first conical section 113, a second conical section 114, a second cylindrical section 117, a guide hole 111 and a second outflow hole 115, the first conical section The transition surface of segment 113 and second tapered segment 114 forms a step 116 .

Further, the auxiliary nozzle inner core 13 is provided with a guide part 131 , a tapered part 133 , a cylindrical part 134 and a guide rib 135 in sequence from left to right, and the guide part is inserted into the guide hole 111 of the auxiliary nozzle housing 11 Among them, the diameter of the bottom surface of the tapered portion 133 is smaller than the diameter of the cylindrical portion 134 , and the outer peripheral surface of the cylindrical portion 134 is provided with guide ribs 135 .

Further, a water-sealing thin groove 112 is provided in the middle of the guide hole 111 , and the water-sealing thin groove 112 is used to seal the gap between the guide portion 131 and the guide hole 111 .

Further, the guide rib 135 and the second straight segment 117 are clearance fit to limit the movement of the auxiliary nozzle inner core 13 and reduce the frictional resistance between the guide rib 135 and the second straight segment 117 .

Further, the auxiliary nozzle housing 11 is installed coaxially with the auxiliary nozzle inner core 13 , and the guide section 131 of the auxiliary nozzle inner core 13 extends out of the guide hole 111 of the auxiliary nozzle housing 11 .

Further, the auxiliary nozzle device further includes an adjustment spring 12 , the adjustment spring 12 is sleeved on the tapered portion 133 of the auxiliary nozzle inner core 13 , and one end of the adjustment spring abuts against the step 116 on the inner wall of the auxiliary nozzle housing 11 , the other end abuts against the cylindrical portion 134 of the sub-nozzle inner core 13 , and the sub-nozzle inner core 13 can be reset by the elastic force of the adjustment spring 12 .

Further, the end face of the cylindrical part 134 connected to the tapered part 133 is provided with a chamfer to form a fourth tapered section 136, and a sealing groove 137 is formed on the fourth tapered section 136, and the sealing groove 137 A sealing ring 15 is fixedly installed inside.

Further, the angle between the second outflow hole 115 and the first outflow hole 132 is β, 10°≤β≤40°.

Further, the diameter of the first outlet hole 132 is 0.3-0.6 of the diameter of the main nozzle 4 , and the diameter of the second outlet hole 115 is 0.4-0.7 of the diameter of the first outlet hole 132 .

The beneficial effect of the present invention is: to provide a secondary nozzle device for the sprinkler nozzle whose nozzle outlet style changes with the working pressure, realize the spraying operation of 3 nozzles under low pressure, and realize the spraying operation of 2 nozzles under high pressure. The control of the number of outlets improves the sprinkling uniformity of the nozzle under low pressure.

Description of drawings

Fig. 1 is a structural diagram of the sprinkler head of the present invention.

Fig. 2 is a structural diagram of the sub-nozzle device of the present invention.

Fig. 3 is a part diagram of the sub-nozzle housing of the present invention;

Fig. 4 is a part diagram of the auxiliary nozzle inner core of the present invention;

Fig. 5 is a cross-sectional view of A-A of the auxiliary nozzle device of the present invention;

Fig. 6 is a part diagram of the spacer sleeve of the present invention;

Reference numerals are explained as follows: 1-auxiliary nozzle device, 2-elbow, 3-nozzle pipe, 4-main nozzle, 5-hollow shaft, 6-swivel connection seat, 11-auxiliary nozzle housing, 12-adjusting spring , 13-Auxiliary nozzle inner core, 14-Limiting sleeve, 15-Sealing ring, 16-Annular flow channel, 111-Guide hole, 112-Water seal groove, 113-First tapered section, 114-Second cone Shaped section, 115-the second outflow hole, 116-step, 117-the second cylindrical section, 131-the guide section, 132-the first outflow hole, 133-conical part, 134-cylindrical part, 135-guiding Rib, 136-fourth tapered section, 137-seal groove, 141-secondary diversion hole, 142-main diversion hole.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

Referring to accompanying drawings 1 to 4, the rocker type sprinkler sprinkler includes a secondary nozzle device 1, an elbow 2, a nozzle 3, a main nozzle 4, a hollow shaft 5 and a swivel connection seat 6, and the secondary nozzle device 1 is installed on the elbow 2 on. The secondary nozzle device 1 includes a secondary nozzle housing 11 , an adjustment spring 12 , a secondary nozzle inner core 13 , a limiting sleeve 14 and a sealing ring 15 . The auxiliary nozzle inner core 13 is set on the inner side of the auxiliary nozzle housing 11 , the auxiliary nozzle housing 11 and the auxiliary nozzle inner core 13 are installed concentrically, and the guide section 131 extends out of the guide hole 111 .

The auxiliary nozzle housing 11 is processed with a guide hole 111, a water seal groove 112, a first conical section 113, a second conical section 114, a second outflow hole 115, a step 116 and a second cylindrical section 117. The auxiliary nozzle The inner core 13 is processed with a guide section 131, a first outlet hole 132, a tapered part 133, a cylindrical part 134, a guide rib 135, a fourth tapered section 136, and a sealing groove 137; the guide section 131 is set in the guide hole 111 The inner side of the guide section 131 and the guide hole 111 is a gap fit, and the water seal slot 112 is arranged in the middle of the guide hole 111 to seal the gap between the guide section 131 and the guide hole 111, preventing the auxiliary nozzle housing 11 and the guide hole 111 from The working fluid between the auxiliary nozzle inner cores 13 is ejected from the gap between the guide section 131 and the guide hole 111; the guide rib 135 and the second straight line segment 117 are clearance fit to limit the movement of the auxiliary nozzle inner core 13 , while reducing the frictional resistance between the guide rib 135 and the second straight line segment 117 .

The diameter of the first outlet hole 132 is 0.3～0.6 of the diameter of the main nozzle 4, and the diameter of the second outlet hole 115 is 0.4～0.7 of the diameter of the first outlet hole 132, so as to realize the spraying of the first outlet hole 132. The working fluid supplements the water volume distribution in the middle area of the spraying area, and the working fluid sprayed from the second outlet hole 115 supplements the water volume distribution in the spraying area near the nozzle.

The second tapered section 114 is parallel to the fourth tapered section 136, which can cut off the working fluid under high pressure. When the working pressure of the nozzle increases to a certain value, the water pressure pushes the inner core 13 of the secondary nozzle to slide in the direction of the guide hole 111, thereby Drive the second tapered section 114 and the fourth tapered section 136 to fit together, and under the joint action of the sealing ring 15, the working fluid in the annular flow channel 16 can be isolated from entering the second outlet hole 115, and the second outlet hole 115 Do not work.

An adjustment spring 12 is set between the sub-nozzle housing 11 and the sub-nozzle inner core 13, and the limit sleeve 14 is mounted on the inner side of the sub-nozzle housing 11 through threaded connection. By adjusting the installation position of the limit sleeve 14, the adjustment spring 12 preload, to ensure the smooth flow of the second spray channel under low pressure conditions, the working fluid can enter the second outlet hole 115, in addition, the limit sleeve 14 can limit the position of the nozzle inner core 13, preventing the non-working state from being adjusted Under the elastic force of the spring 12 , the inner core 13 of the spray nozzle falls off from the sub-nozzle housing 11 .

Referring to accompanying drawing 6, described limit sleeve 14 is processed with sub-direction hole 141 and main flow hole 142, and secondary flow hole 141 provides working fluid for the second spray channel, and main flow hole 142 provides working fluid for the first spray channel. fluid. In order to realize that the working fluid sprayed by the first outlet hole 132 and the second outlet hole 115 covers different spraying areas, the ratio of the flow area of the secondary guide hole 141 to the flow area of the main guide hole 142 is not greater than 0.4.

The working process of the nozzle is:

Under the low-pressure working condition, due to the low working pressure, under the action of the pre-tightening force of the adjustment spring 12, the second conical section 114 on the sub-nozzle group housing 11 and the fourth conical section 136 on the sub-nozzle inner core 13 Before it fits, a small part of the working water flow enters the annular flow channel 16 through the auxiliary diversion hole 141 on the limit sleeve 14, and sprays out from the second outlet hole 115, and the second spray channel covers the area near the nozzle in the spray area; Part of the working water flow enters the sub-nozzle core 13 from the main flow hole 142, and is sprayed out from the first outlet hole 132, and the first spray channel covers the area near the middle range in the spray area; most of the water flow is sprayed from the main nozzle 4 of the sprinkler head , which mainly covers the water volume distribution at the middle and long range in the spraying area; through the joint action of three working water flows in different coverage areas, uniform spraying under low pressure is realized.

When the working pressure of the nozzle increases to work near the rated pressure, the water pressure pushes the inner core 13 of the auxiliary nozzle to slide in the direction of the guide hole 111, the adjustment spring 12 is compressed, and the second tapered section 114 on the auxiliary spray group casing 11 and the auxiliary nozzle The fourth tapered section 136 on the nozzle inner core 13 fits together, the second spray channel is closed, and the working water flow entering the second outlet hole 115 is cut off, and the second outlet hole 115 is not working; part of the working water flow flows from the main flow hole 142 Enter the sub-nozzle core 13, at this time, the effect of water flow is better, and the working water flow sprayed from the first outlet hole 132 can cover the area between the middle range in the spray area and the installation position of the sprinkler; most of the water flows from the main nozzle of the sprinkler Nozzle 4 sprays out to cover the entire spray area; at this time, two working water streams in different coverage areas work together to achieve uniform spraying from the nozzle.

The described embodiment is a preferred implementation of the present invention, but the present invention is not limited to the above-mentioned implementation, without departing from the essence of the present invention, any obvious improvement, replacement or modification that those skilled in the art can make Modifications all belong to the protection scope of the present invention.

Claims (10)

1. A secondary nozzle device of a sprinkler nozzle, the secondary nozzle device (1) is installed on the elbow (2) of the sprinkler nozzle, it is characterized in that it comprises a secondary nozzle housing (11), a secondary nozzle inner core (13) and Limiting sleeve (14); The secondary nozzle housing (11) has a guide hole (111) and a second outlet hole (115); The limiting sleeve (14) is provided with a secondary diversion hole (141) and a main diversion hole (142), and the limiting sleeve (14) is fixedly connected in the inner cavity of the secondary nozzle housing (11) through threads; The auxiliary nozzle inner core (13) is movably fitted in the inner cavity of the auxiliary nozzle housing (11), and one end of the auxiliary nozzle inner core (13) is inserted into the guide hole (111) of the auxiliary nozzle housing (11) , the other end abuts against the limit sleeve (14), and the limit sleeve is used to adjust the position of the auxiliary nozzle inner core (13) in the auxiliary nozzle housing (11); The main guide hole (142) of the limiting sleeve (14) and the guide hole of the auxiliary nozzle inner core (13) form a first spray channel; the auxiliary guide hole (141) of the limiting sleeve (14), The gap between the sub-nozzle housing (11) and the sub-nozzle inner core (13) and the second outlet hole (115) of the sub-nozzle housing (11) form a second spraying channel. 2. The auxiliary nozzle device of the sprinkler head according to claim 1, characterized in that: the inner wall of the auxiliary nozzle housing (11) comprises a first tapered section (113), a second tapered section (114), The second cylindrical section (117), the guide hole (111) and the second outlet hole (115), the transition surface of the first tapered section (113) and the second tapered section (114) forms a step (116) . 3. The sub-nozzle device of the sprinkler head according to claim 1, characterized in that: the sub-nozzle inner core (13) is provided with a guide section (131), a tapered part (133), a round cylinder part (134) and guide ribs (135), the guide part is inserted into the guide hole (111) of the sub-nozzle housing (11), and the diameter of the bottom surface of the tapered part (133) is smaller than that of the cylinder part (134 ), the outer peripheral surface of the cylindrical portion (134) is provided with guide ribs (135). 4. The sub-nozzle device of the sprinkler head according to claim 2 or 3, characterized in that: a water-sealed slot (112) is provided at the middle position of the guide hole (111), and the water-sealed slot (112) Used to seal the gap between the guide section (131) and the guide hole (111). 5. The auxiliary nozzle device of the sprinkler head according to claim 4, characterized in that: the guide rib (135) and the second cylindrical section (117) are in clearance fit to limit the inner core (13) of the auxiliary nozzle The movement can reduce the frictional resistance between the guide rib (135) and the second cylindrical section (117) at the same time. 6. according to the secondary nozzle device of claim 1 or 2 or 3 described sprinkler nozzles, it is characterized in that, described secondary nozzle shell (11) and secondary nozzle inner core (13) are installed coaxially, secondary nozzle inner core ( 13) The guide segment (131) protrudes from the guide hole (111) of the sub-nozzle housing (11). 7. The auxiliary nozzle device of the sprinkler head according to claim 1, characterized in that: the auxiliary nozzle device further comprises an adjustment spring (12), and the adjustment spring (12) is sleeved on the inner core (13) of the auxiliary nozzle ), one end abuts on the step (116) of the inner wall of the sub-nozzle casing (11), and the other end abuts on the cylindrical part (134) of the sub-nozzle inner core (13) , the secondary nozzle inner core (13) can be reset by the elastic force of the adjustment spring (12). 8. The sub-nozzle device of the sprinkler head according to claim 7, characterized in that: the end face of the cylindrical part (134) connected to the tapered part (133) is provided with a chamfer so as to form a fourth tapered section ( 136), the fourth tapered section (136) is provided with a sealing groove (137), and a sealing ring (15) is fixedly installed in the sealing groove (137). 9. The sub-nozzle device of the sprinkler head according to claim 1, characterized in that: the angle between the axis of the second outflow hole (115) and the axis of the first outflow hole (132) is β, 10°≤β≤40°. 10. The auxiliary nozzle device of the sprinkler head according to claim 9, characterized in that: the diameter of the first outlet hole (132) is 0.3-0.6 of the diameter of the main nozzle (4), and the second outlet hole ( 115) has a diameter of 0.4-0.7 of the diameter of the first outflow hole (132).