CN107537703B - Differential force rotary spray head - Google Patents

Abstract

The invention relates to a differential rotation type spray head which comprises a V-shaped rotating arm, a spray nozzle, a dustproof cap, a sealing cover, a gasket, a limiting nut, a bearing shell, a bearing bush, an oil seal, a first sealing rubber ring, a second sealing rubber ring and a third sealing rubber ring. This shower nozzle simple structure is reasonable, need not often to change lubricating oil, and is sealed effectual, can realize even low-speed rotatory, the water spray is even, save the water resource, the installation with dismantle convenient.

Description

Differential force rotary spray head

Technical Field

The invention relates to a sprinkling irrigation device, in particular to a differential rotary type spray head which can be used for all the fields, gardens, landscapes, fruits, vegetables, flowers and the like needing irrigation.

Background

At present, the rotary sprayers used in the market are of two types, the first type is a rocker arm rotary sprayer (called rocker arm sprayer for short) designed according to a mechanical principle, the second type is a jet flow rotary sprayer (called jet flow sprayer for short) designed according to a fluid mechanics principle, when the sprayers of the two types are used, people find that the defects of uneven spraying, unstable spraying frame, easy overturning, unstable rotating speed, incapability of realizing large-scale and large-area irrigation, poor sealing effect, short service life and the like exist, and in order to overcome the defects and shortcomings, the applicant provides a prior application with an application number: 201410076494.1 (reflective rotary sprinkler), which, although overcoming to some extent the above drawbacks and drawbacks, in use the applicant has found that certain drawbacks exist, as reflected in: (1) the dustproof cap and the shaft tube are connected in a threaded manner and sleeved on the bearing shell, water is easy to seep due to the fact that the threaded connection is not tight in sealing, lubricating oil is deteriorated after the water seeps into the bearing shell, and oil needs to be changed frequently, so that a lot of troubles are brought; (2) the friction between the shaft tube and the bearing bush is hard friction, the rotation is not uniform enough, and the low-speed rotation cannot be realized in the rotation process; (3) the disassembly and assembly mode in the existing structure is realized by screwing off the sealing screw plug, the disassembly is relatively easy, but the assembly is very inconvenient; (4) the water spray of the nozzles in the existing structure is not even enough, and the middle zone is often lack of water during spraying.

Disclosure of Invention

The invention aims to provide a differential rotation type spray head which is simple and reasonable in structure, free of frequent replacement of lubricating oil, good in sealing effect, capable of achieving uniform low-speed rotation and uniform water spraying, saving water resources and convenient to install and disassemble.

The invention aims to realize the purpose, the spray head comprises a V-shaped rotating arm, a spray nozzle, a dustproof cap, a sealing cover, a gasket, a limiting nut, a bearing shell, a bearing bush, an oil seal, a first sealing rubber ring, a second sealing rubber ring and a third sealing rubber ring, the spray nozzle is symmetrically arranged at the two top ends of the V-shaped rotating arm, the limiting nut is in threaded connection with an arm body below the V-shaped rotating arm, the gasket, the sealing cover and the dustproof cap are sequentially sleeved on the arm body of the V-shaped rotating arm above the limiting nut from bottom to top, the inner wall of the sealing cover is provided with the second sealing rubber ring, the outer wall of the sealing cover is provided with the third sealing rubber ring, the inner wall of the dustproof cap is provided with the first sealing rubber ring, the bearing shell is sleeved outside the sealing cover, the gasket and the limiting nut, the upper end of the bearing bush is in threaded connection with the sealing cover, the bearing bush is arranged between the limiting nut at the lower end of the inside of the bearing shell and the bearing shell, and the oil seal is arranged between the V-shaped rotating arm body at the lower end of the inside the bearing shell and the bearing shell.

The nozzle is provided with a positive perforation and a reflecting hole, and an angle alpha between the positive perforation and the reflecting hole is 120 degrees.

The invention has the following advantages and positive effects:

1. the invention changes the original threaded connection of the dust cap into the sleeved connection of the sealing ring and the buckling connection of the sealing ring on the sealing cover, thereby avoiding the defects of untight sealing and easy water seepage, preventing the lubricating oil in the bearing shell from deteriorating and needing not to be replaced frequently.

2. The sealing cover structure is added, the sealing ring is arranged on the inner hole arm of the sealing cover, and the sealing ring and the shaft tube rotate in a zero-clearance friction mode, so that the sealing effect is achieved, and the effect of uniform rotation is achieved.

3. The invention adopts two sealing structures of the dustproof cap seal and the sealing cover seal, has good sealing effect, less failure occurrence rate, stable rotation and prolonged service life.

4. The invention cancels the oil injection hole, and the processing is more convenient; meanwhile, the disassembly can be realized only by loosening the screw of the sealing cover, so that the disassembly is more convenient and easier.

5. The angle between the reflecting hole and the normal incidence hole on the nozzle is set to be 120 degrees, the angle is more reasonable, no matter which hole of the normal incidence hole and the reflecting hole is raised, the spraying distance of the higher hole is relatively close, and the spraying distance of the lower hole is relatively far, so that the spraying uniformity can be kept, the water is sprayed more uniformly, and no dead angle exists.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is an exploded view of the invention of fig. 1.

Fig. 3 is an assembly view of the components of fig. 2 of the present invention.

FIG. 4 is a cross-sectional view of a nozzle arrangement according to the present invention.

FIG. 5 isbase:Sub>A sectional view taken along line A-A of FIG. 4 in accordance with the present invention.

Reference numerals in the above figures: 1. the device comprises a V-shaped rotating arm, 2, a nozzle, 3, a dust cap, 4, a sealing cover, 5, a gasket, 6, a limiting nut, 7, a bearing shell, 8, a bearing bush, 9, an oil seal, 10, a first sealing rubber ring, 11, a second sealing rubber ring, 12, a third sealing rubber ring, 13 limiting nut connecting threads, 14, sealing cover connecting threads, 15, pipeline connecting threads, 16, an orthographic hole, 17, a reflection hole, 18 and an arm body.

Detailed Description

Shown in attached figures 1 and 2: the spray head comprises a V-shaped rotatingarm 1, anozzle 2, adustproof cap 3, asealing cover 4, agasket 5, alimiting nut 6, abearing shell 7, abearing bush 8, anoil seal 9, a first sealingrubber ring 10, a second sealingrubber ring 11 and a third sealingrubber ring 12, wherein thenozzle 2 is symmetrically arranged at two top ends of the V-shaped rotatingarm 1, thelimiting nut 6 is in threaded connection with anarm body 18 below the V-shaped rotatingarm 1, thegasket 5, thesealing cover 4 and thedustproof cap 3 are sequentially sleeved on thearm body 18 of the V-shaped rotatingarm 1 above thelimiting nut 6 from bottom to top, the second sealingrubber ring 11 is arranged on the inner wall of thesealing cover 4, the third sealingrubber ring 12 is arranged on the outer wall of thesealing cover 4, the first sealingrubber ring 10 is arranged on the inner wall of thedustproof cap 3, thebearing shell 7 is sleeved outside thesealing cover 4, thegasket 5 and thelimiting nut 6, the upper end of the bearing shell is in threaded connection with thesealing cover 4, thebearing shell 7 is arranged between thelimiting nut 6 and thebearing shell 7 at the lower end of the inside, thebearing shell 7, and theoil seal 9 is arranged between thearm body 18 of the V-shaped rotatingarm 1 and thebearing shell 7 at the lower end of the inside of thebearing shell 7.

Thenozzle 2 is provided with apositive perforation 16 and a reflectinghole 17, and an angle alpha between thepositive perforation 16 and the reflectinghole 17 is 120 degrees.

The working process comprises the following steps:

when thebearing shell 7 is used, thebearing shell 7 is connected with a water inlet pipeline through thepipeline connecting thread 15, the directions of thenormal perforation 16 and thereflection hole 17 on the twonozzles 2 arranged at the top end of the V-shaped rotatingarm 1 are opposite, so when a water pump pressurizes water and sends the water to a spray head through a pipeline, the water flow is sprayed from thenormal perforation 16 and thereflection hole 17 on thenozzles 2, the water sprayed from thenormal perforation 16 is scattered in a near range of the spray head, the water sprayed from thereflection hole 17 covers a far range, and thereflection hole 17 not only sprays the water to a far range, but also plays a role in generating power for the rotation of the spray head.

The working principle is as follows:

if the power for pushing the nozzle to rotate is F, the frictional resistance is F₁ Thrust of normal perforation is F₂ Thrust of the reflection hole is F₃ Then the force F = F for pushing the spray head to rotate₃ - F₁ - F₂ . Due to F₁ Is constant, F₂ And F₃ Is adjustable, when the nozzle is manufactured (delivered from factory) according to the condition that the normal perforation and the reflecting hole are at the horizontal elevation angle of 30 degrees at the same time, F₃ Greater than F₁ Adding F₂ When the sprayer works, the sprayer is in a state of rotating at a medium constant speed, when the rotating speed needs to be accelerated, the angle of the reflecting hole can be adjusted downwards, the horizontal elevation angle of the reflecting hole is lower than 30 degrees, meanwhile, the horizontal elevation angle of the regular hole is larger than 30 degrees, and the thrust generated by air reverse thrust on the rotation of the sprayer is smaller in angle and smaller in thrustThe larger the angle is, the larger the thrust is, so that when the horizontal inclination angle of the reflection hole is adjusted to be 0 degrees, the maximum angle of the horizontal elevation angle of the normal incidence hole is 60 degrees, and F is at the moment₃ Maximum, positive thrust F₂ And the minimum value is that the spray head rotates fastest and the F value is maximum. On the contrary, when the rotation at low speed is needed, the normal incidence hole is adjusted downwards, and when the normal incidence hole is adjusted to the horizontal elevation angle of 0 degree, the horizontal elevation angle of the reflection hole is 60 degrees, and at this time, F₃ - F₁ - F₂ The difference is minimum, the force F for pushing the spray head to rotate is minimum, and the spray head is in the state of rotating at the lowest speed.

Claims (1)

1. The utility model provides a differential rotation formula shower nozzle, this shower nozzle includes V-arrangement rocking arm (1), nozzle (2), dust cap (3), packing ring (5), bearing housing (7), axle bush (8), oil blanket (9), first sealed rubber ring (10), second sealed rubber ring (11) and third sealed rubber ring (12), its characterized in that: the novel oil-gas well drilling device is characterized by further comprising a sealing cover (4) and a limiting nut (6), wherein the limiting nut (6) is in threaded connection with an arm body (18) below the V-shaped rotating arm (1), a gasket (5), the sealing cover (4) and a dustproof cap (3) are sequentially sleeved on the arm body (18) of the V-shaped rotating arm (1) above the limiting nut (6) from bottom to top, a second sealing rubber ring (11) is arranged on the inner wall of the sealing cover (4), a third sealing rubber ring (12) is arranged on the outer wall of the sealing cover (6), a first sealing rubber ring (10) is arranged on the inner wall of the dustproof cap (3), the bearing shell (7) is sleeved on the outer sides and the upper end of the sealing cover (4), the gasket (5) and the limiting nut (6) and is in threaded connection with the sealing cover (4), an oil seal (9) is arranged between the limiting nut (6) and the bearing shell (7) at the inner lower end of the bearing shell (7), an oil seal (9) is arranged between the arm body (18) of the V-shaped rotating arm (1) and the bearing shell (7) at the inner lower end of the bearing shell (7), a perforation hole (2) is symmetrically arranged between the rotating arm (1), and a positive reflection hole (17) are arranged between the two positive reflection angle alpha-shaped rotating arm (17) and the two reflection hole (17), the water ejected by the positive perforation (16) is scattered in a near range of the spray head, and the water ejected by the reflection hole (17) covers a far-end range.

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