CN203853190U - Fixed spray nozzle with square spray regions - Google Patents

Abstract

The utility model relates to an irrigation spray nozzle, in particular to a fixed spray nozzle with square spray regions. The fixed spray nozzle comprises a pipeline connecting section (1), a nozzle (2), a flow guide curved surface (3) and a reflection cone (4). The flow guide curved surface (3) is arranged on the upper portion of the nozzle (2), a flow guide angle alpha of the flow guide curved surface (3) can be continuously changed in a range from a first flow guide angle alpha 1 and a second flow guide angle alpha 2, and the flow guide curved surface (3) has a 90-degree opening range on the horizontal plane; the reflection cone (4) which is parallel to the flow guide curved surface (3) is arranged on the upper portion of the flow guide curved surface (3), the angle change of the reflection cone (4) is identical to the angle change of the flow guide curved surface (3), and a water flow channel can be formed under the joint effects of the reflection cone (4) and the flow guide curved surface (3); the flow guide angle alpha is determined by the aid of a functional relation expression. The fixed spray nozzle has the advantages of simple structure, low cost, zero special requirements on materials and applicability to large-scale production and application.

Description

A kind of fixed sprinkler of square spray field

Technical field

The utility model relates to the fixed sprinkler of a kind of water dispensing head for irrigation, particularly a kind of square spray field.

Background technology

Traditional sprinkler irrigation technique based on whole-round shower nozzle cannot meet the sprinkling needs in difformity plot, and in sprinkling irrigation process, can produce that spray area is overlapping, drain spray, the problem such as sprinklings out-of-bounds, so the research and development of non-circular territory sprinkler irrigation technique are most important.Non-circular territory sprinkler irrigation technique take that improve to irrigate the whole uniformity be target, is intended to realize shower nozzle and sprays that territory and ground are block-shaped substantially to be approached and facilitate the combination layout between shower nozzle.

In the research in sprinkler irrigation technique field, non-circular territory, mainly concentrate on aspect the improvement of impact driven sprinkler at present both at home and abroad.Relevant patented technology has: non-circular spraying district, application number 01265799.9; The shower nozzle servicing unit of non-circular spraying district, application number 01247020.1; The impact driven sprinkler of non-circular spraying district, application number 03218590.1; Elevation angle automatic regulation variable spray nozzle, application number 201010250227.3 etc.Current most patent is all on the basis of impact driven sprinkler, to increase the structures such as flow control valve, cam disc, by consuming more energy, realizes non-circular spraying district.This project organization is comparatively complicated, and the loss of flood peak is larger.

Summary of the invention

The purpose of this utility model is to propose a kind of simple in structure, fixed sprinkler of being convenient to time processing moulding, energy consumption is low, hydraulic efficiency is high square spray field.

The purpose of this utility model is achieved through the following technical solutions:

A fixed sprinkler for square spray field, comprises pipeline linkage section 1 and nozzle 2, and it also comprises water conservancy diversion curved surface 3 and refraction cone 4, wherein, on nozzle 2 tops, channelization angle α is set at the first channelization angle α ₁with the second channelization angle α ₂between continually varying water conservancy diversion curved surface 3, the opening scope of water conservancy diversion curved surface 3 on horizontal plane is 90 °; And angle parallel with water conservancy diversion curved surface 3 is set on water conservancy diversion curved surface 3 tops and changes identical refraction and bore 4, formed water flow passage with 3 actings in conjunction of water conservancy diversion curved surface;

Described channelization angle α is determined by following functional relation:

$L=\frac{v\sin \mathrm{\α}+\sqrt{v^2\mathrm{si}{n}^2\mathrm{\α}+2\mathrm{gh}}}{g}\·v\cos \mathrm{\α}$

L---range (m)

V---current outgoing speed (m/s)

α---jet angle (°)

H---shower nozzle is apart from ground level (m);

Jet angle in formula is corresponding with described channelization angle, wherein, and the first channelization angle α ₁corresponding to the beeline in square spray field, i.e. the foursquare length of side; The second channelization angle α ₂corresponding to the maximum distance in square spray field, i.e. foursquare diagonal.

Described the first channelization angle α ₁span be 5 °～8 °.

Described the second channelization angle α ₂span be 30 °～35 °.

0.5～the 1.5mm that is spaced apart between 4 is bored in described water conservancy diversion curved surface 3 and refraction.

Water conservancy diversion curved surface 3 is a curved section on vertical cross-section, and described curved section has straightway a, arc b and axial length c from top to bottom successively, and described arc b and straightway a and axial length c are tangent.

Within the scope of 90 ° of openings, the length of described straightway a remains unchanged, and span is 3～6mm.

The second channelization angle α ₂vertical cross-section position, the radius of arc b is R=σ (D2-φ 2), wherein σ is correction factor, its span is that 1～1.15, D is internal diameter of the pipeline, Φ is the contraction place internal diameter of nozzle 2; In the vertical cross-section position of other channelization angles α, the radius of arc b is r=R-0.18 (α ₂-α).

The beneficial effects of the utility model are:

The utility model simple structure, cost are low, for material, without specific (special) requirements, are suitable for large-scale production and application.Meanwhile, because the utility model is to reach by increasing water conservancy diversion curved-surface structure the object that changes range, therefore extra power drive device and energy consumption be needn't increase, reliability and service life greatly improved.Spray shower nozzle sum and network collocation that the block-shaped compatibility in territory and ground has reduced spray irrigation system, avoided respraying, drain spray and super spray, improved irrigation uniformity, be conducive to extensive popularization.

Accompanying drawing explanation

Fig. 1 is that the structure of the fixed sprinkler of the utility model square spray field is partly cutd open schematic diagram;

Fig. 2 is that the structure partial of the fixed sprinkler of the utility model square spray field cuts open schematic diagram;

Fig. 3 is sprinkling region and the corresponding design sketch of angle of the fixed sprinkler of the utility model square spray field;

Fig. 4 is the water conservancy diversion curved surface schematic diagram of the fixed sprinkler of the utility model square spray field;

Fig. 5 is the second channelization angle α of the fixed sprinkler of the utility model square spray field ₂the generalized section at place;

Fig. 6 is the first channelization angle α of the fixed sprinkler of the utility model square spray field ₁the generalized section at place;

Fig. 7 is the refraction wimble structure schematic diagram of the fixed sprinkler of the utility model square spray field.

Reference numeral:

1 pipeline linkage section 2 nozzle 3 water conservancy diversion curved surfaces

4 refraction cones

The specific embodiment

Below in conjunction with drawings and Examples, the specific embodiment of the present utility model is described in further detail.

In order to adapt to the pressure condition of conventional pressure pipeline, the circular spraying range that the fixed sprinkler of square spray field is original 360 ° is set to the square spraying range within the scope of 90 ° in plane.The opening scope of shower nozzle delivery port is 90 °, and the fixed sprinkler of square spray field is positioned at a corner point of square spray field, as shown in Figure 3.Under identical operating pressure, can realize square sprinkling region like this, can also effectively increase range, improve the uniformity.

The cardinal principle that changes range is by continually varying space water conservancy diversion curved surface being set in 90 ° of scope inner flow passages of shower nozzle delivery port, change the current outgoing velocity attitude at place, each exit position and the angle of horizontal plane, thereby change range, realize square sprinkling territory.

According to range theory and model test, under certain operating pressure, the functional relation of the jet angle α of range L and shower nozzle delivery port (angle of current outgoing velocity attitude and horizontal plane) is substantially satisfied:

$L=\frac{v\sin \mathrm{\α}+\sqrt{v^2\mathrm{si}{n}^2\mathrm{\α}+2\mathrm{gh}}}{g}\·v\cos \mathrm{\α}---\left(1\right)$

L---range (m)

V---current outgoing speed (m/s)

α---jet angle (°)

H---shower nozzle is apart from ground level (m)

Shower nozzle is the key factor that affects range L at the jet angle α of exit diverse location.Therefore, design water conservancy diversion angle continually varying space water conservancy diversion curved surface, current are changed at the jet angle α at the outlet of shower nozzle after water conservancy diversion non-plane motion diverse location place, and now the channelization angle of water conservancy diversion curved surface is jet angle α, by the range of correspondence direction, according to formula (1), is determined.

As shown in Figure 1, 2, the applicable working pressure range of the fixed sprinkler of the utility model square spray field is 10～25m head pressure.Structure is from top to bottom followed successively by: pipeline linkage section 1, nozzle 2, water conservancy diversion curved surface 3, refraction cone 4.

Wherein, pipeline linkage section 1 can arrange connecting thread, is connected (as shown in Figure 1) with aqueduct.

The opening scope of water conservancy diversion curved surface 3 on horizontal plane is 90 °, and water conservancy diversion curved surface 3 is a curved section on vertical cross-section, and described arc has straightway a, arc b and axial length c from top to bottom successively.

Wherein, the angle of straightway a and horizontal plane is channelization angle α, and the size of α changes with the range of place vertical cross-section correspondence direction.During the beeline in range is square spray field (the square length of side) as shown in Figure 3, channelization angle is herein the first channelization angle α ₁, according to formula (1), determine that its span is 5 °～8 °; During the maximum distance in range is square spray field (square diagonal) as shown in Figure 3, channelization angle is herein the second channelization angle α ₂, according to formula (1), determine that its span is 30 °～35 ° (as shown in Figure 3), between the square length of side and diagonal, the value of corresponding channelization angle α is determined according to formula (1).Preferably, between the square length of side and diagonal, the value of corresponding channelization angle α also can be drawn by linear interpolation, forms thus channelization angle continually varying water conservancy diversion curved surface (as Fig. 4) within the scope of 90 ° of hoops.

Within the scope of 90 ° of openings, the length of straightway a remains unchanged, and span is 3～6mm.Arc b and straightway a and axial length c are tangent.At the second channelization angle α ₂vertical cross-section position (as Fig. 5), the radius of arc b is R=σ (D2-φ 2), wherein σ is correction factor (span is 1～1.15), D is internal diameter of the pipeline, Φ is the contraction place internal diameter of nozzle 2; In the vertical cross-section position of other channelization angles α (as Fig. 6), the radius of arc b is r=R-0.18 (α ₂-α).The span of axial length c is 1～3mm, for supplementing the height of water conservancy diversion curved surface, guarantees that the starting point of current within the scope of 90 ° of openings is identical.

Above water conservancy diversion curved surface, design is parallel to the refraction cone 4 of water conservancy diversion curved surface 3, the variation identical with water conservancy diversion curved surface 3 (as Fig. 7) of the corresponding channelization angle α of its all directions, and the distance between water conservancy diversion curved surface 3 and refraction cone 4 is 0.5～1.5mm.

In realizing the process of square region sprinkling, for meeting rainfall distribution uniformity, the flow that requires diagonal place is length of side place doubly.The runner that water conservancy diversion curved surface 3 and refraction cone 4 form can effectively be adjusted the first channelization angle α on water conservancy diversion curved surface 3 ₁with the second channelization angle α ₂the flow of peripheral region, makes the second channelization angle α ₂sprinkling flow meet the first channelization angle α ₁2 times, coordinate mutually with the range of its correspondence direction, form and to execute the uniform square spray field of water.

In use, sprinkling irrigation water enters shower nozzle from pipeline linkage section 1 to the utility model, and after the nozzle 2 sharply shrinking, the broken particle that forms of water droplet, reaches atomizing effect.Through continually varying water conservancy diversion curved surface 3 and the runner that refraction cone 4 forms, complete assignment of traffic again, the flow of realizing diagonal positions place is length of side position doubly, thus meet the requirement of uniformity coefficient of sprinkler irrigation.Under the effect of water conservancy diversion curved surface 3, the water flow jet angle of all directions in 90 ° of spraying range is changed and is controlled at the first channelization angle α ₁(5 °～8 °) and the second channelization angle α ₂in (30 °～35 °) scope, the first channelization angle α ₁range corresponding to the beeline in square region, i.e. the square length of side; The second channelization angle α ₂range corresponding to the maximum distance of square region, i.e. square diagonal; The length of side of square region is to diagonal positions, and channelization angle α is by the first channelization angle α ₁be increased to gradually the second channelization angle α ₂.Current can meet the requirement in square sprinkling region after being sprayed by shower nozzle, due to the distribution of atomizing and flow, the water yield of ejection are uniformly distributed in square region.

At internal diameter of the pipeline, be that under 20mm, the working-pressure head condition that is 16m, nozzle contraction place internal diameter is 10mm, nozzle height 10mm, water conservancy diversion curved surface 3 height 10mm, water conservancy diversion curved surface 3 and refraction cone 4 spacing 1mm.This shower nozzle can spray the square area that the length of side is 4～5m, and atomization index can reach 4000, and uniformity coefficient of sprinkler irrigation is more than 80%, meets sprinkling irrigation requirement.

Claims (7)

1. the fixed sprinkler of a square spray field, comprise pipeline linkage section (1) and nozzle (2), it is characterized in that: it also comprises water conservancy diversion curved surface (3) and refraction cone (4), wherein, on nozzle (2) top, channelization angle α is set at the first channelization angle α ₁with the second channelization angle α ₂between continually varying water conservancy diversion curved surface (3), the opening scope of water conservancy diversion curved surface (3) on horizontal plane is 90 °; And angle parallel with water conservancy diversion curved surface (3) is set on water conservancy diversion curved surface (3) top and changes identical refraction and bore (4), formed water flow passage with water conservancy diversion curved surface (3) acting in conjunction;

Described channelization angle α is determined by following functional relation:

L---range (m)

V---current outgoing speed (m/s)

α---jet angle (°)

H---shower nozzle is apart from ground level (m);

Jet angle in formula is corresponding with described channelization angle, wherein, and the first channelization angle α ₁corresponding to the beeline in square spray field, i.e. the foursquare length of side; The second channelization angle α ₂corresponding to the maximum distance in square spray field, i.e. foursquare diagonal.

2. the fixed sprinkler of a kind of square spray field according to claim 1, is characterized in that: described the first channelization angle α ₁span be 5 °～8 °.

3. the fixed sprinkler of a kind of square spray field according to claim 1, is characterized in that: described the second channelization angle α ₂span be 30 °～35 °.

4. the fixed sprinkler of a kind of square spray field according to claim 1, is characterized in that: the 0.5～1.5mm that is spaced apart between (4) is bored in described water conservancy diversion curved surface (3) and refraction.

5. the fixed sprinkler of a kind of square spray field according to claim 1, it is characterized in that: water conservancy diversion curved surface (3) is a curved section on vertical cross-section, described curved section has straightway a, arc b and axial length c from top to bottom successively, and described arc b and straightway a and axial length c are tangent.

6. the fixed sprinkler of a kind of square spray field according to claim 5, is characterized in that: within the scope of 90 ° of openings, the length of described straightway a remains unchanged, and span is 3～6mm.

7. the fixed sprinkler of a kind of square spray field according to claim 5, is characterized in that: the second channelization angle α ₂vertical cross-section position, the radius of arc b is R=σ (D2-φ 2), wherein σ is correction factor, its span is that 1～1.15, D is internal diameter of the pipeline, Φ is the contraction place internal diameter of nozzle (2); In the vertical cross-section position of other channelization angles α, the radius of arc b is r=R-0.18 (α ₂-α).