CN2650497Y

CN2650497Y - Pressure-compensating throttler

Info

Publication number: CN2650497Y
Application number: CN 03264318
Authority: CN
Inventors: 张克毅
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-06-02
Filing date: 2003-06-02
Publication date: 2004-10-27
Anticipated expiration: 2013-06-02

Abstract

A throttling device is provided, which comprises a shell (1) formed by deformable thin wall, the inner cavity is arranged with a discrete elastic rubber ball (2), the pressure water is flown outside from an outlet (4) after entered from an inlet (3) and flows through the fissure of the elastic rubber ball, meanwhile, the size of fissure is reversely changed with the water pressure in a delivery pipe (7). The net structure and energy consumption channel can be varied with the dynamic variation of water pressure, which lets the device with the excellent pressure compensation and antiblocking performances, thus the device is very suitable for water-saving agricultural field to form a micro-irrigation device, such as a micro-drip nozzle, and a drip-irrigation hose, etc.

Description

The pressure-compensated throttling arrangement

Technical field

The utility model relates to a kind of being fixed on pressure liquid-transport pipe-line or the container inner wall, in order to the throttling arrangement of automatic adjusting fluid flow.The utility model is specially adapted to construct micro-irrigation emitter in the water-saving agriculture field, as micro drop head and irrigate band, drip irrigation pipe etc.

Background technology

Good micro-irrigation emitter should possess two important performances, i.e. pressure compensation and block resistance.The former can make up-and-down region obtain to irrigate uniformly, and the latter can make irrigation system be suitable for relatively poor water quality and use limit more all the year round.

On structure, present widely used irrigator, as various types of labyrinth types and pressure-compensated micro drop head, the water stream channel energy dissipating decompression of a long and narrow and fixed apertures is mostly adopted in the irrigate band.This tactic pattern itself has greatly limited the raising of irrigator block resistance, and very high to the requirement on machining accuracy of energy dissipating passage and pressure compensation mechanism.

The purpose of this utility model is to provide a kind of throttling arrangement of new construction, and the micro-irrigation emitter of constructing with this throttling arrangement has good pressure compensation and block resistance, and simple in structure, is easy to processing.

Summary of the invention

The purpose of this utility model is achieved in that the described throttling arrangement of this utility model comprises shell, inflow entrance, flow export and bluff body.

Described shell be one by outer wall around forming the tubular member of inner chamber, the whole or at least one parts of described outer wall are made of the deformable thin-walled.Described inflow entrance and flow export are tubular member, and there is the fluid passage centre, and they lay respectively at the two ends of described shell.

It is characterized in that described bluff body is the block things of a plurality of elastomers, be limited among the described inner chamber by the outer wall of described shell and described inflow entrance and flow export.

Described flow export is fixed on pressure liquid-transport pipe-line or the container inner wall, and be communicated with the outlet on described pipeline or the chamber wall, make pressure fluid to enter among the inner chamber of described shell through described inflow entrance, and the slit between the block thing of the described elastomer of flowing through, flow to pressure liquid-transport pipe-line or external container from described flow export.

Simultaneously, the outer surface of described shell bears the pressure of pressure liquid-transport pipe-line or liquid in container, and described deformable thin-walled is inwardly shunk.When fluid pressure raise, the contraction of described deformable thin-walled strengthened, and the volume of the block thing of described elastomer is compressed, and described slit reduces thereupon.Otherwise when fluid pressure reduced, described slit increased.The Back Up in this fluid pressure and current slit makes this throttling device have good pressure compensation performance.

As can be seen from the above description, the most remarkable difference of throttling arrangement of the present utility model and prior art is, the energy dissipating relief passage of this throttling device is not the single passage of machine-shaping in advance, but the block thing of described elastomer forms the netted slit of dynamic change when being squeezed at random.This energy dissipating passage that is made of the slit net does not have fixed path and aperture, and this makes this throttling device have extremely strong antiblocking ability.Enter impurity particle in the described slit and chemical sediment etc. with current, quantity or shaped slightly that its effect resembles elastomer block in the described inner chamber change, and this discharge influence to this throttling device integral body is little, more can not cause obstruction.The slit that is made of the block thing of elastomer has very big tolerance, and along with these slits stretched and relaxed action and current scour, impurity particle can constantly be discharged from described flow export.This self-cleaning function occurs in the overall process of this throttling device work.

The utility model throttling arrangement is provided with the cellular barrier and goes out to stop the block logistics of elastomer in the fluid passage of described inflow entrance and flow export.

The most frequently used structure of the block thing of the described elastomer of the utility model throttling arrangement is the identical glueballs set of diameter.The glueballs diameter requires usually between one to ten millimeter according to discharge.Also can form wire harness with adhesive tape.

The part of the described shell of the utility model throttling arrangement or whole outer wall can be connected into one with the inwall of pressure liquid-transport pipe-line or container, to construct various forms of drip irrigation emitters and valve.

The utility model is simple in structure, does not have the high accuracy parts, therefore is easy to processing, and production cost is low, is particularly suitable for the valve of the various micro drop head of structure, irrigate band, drip irrigation pipe and controlled water flow amount in the water-saving agriculture field etc.

Description of drawings

Concrete structure of the present utility model is provided by following examples and accompanying drawing thereof.

Fig. 1 is the profile according to a kind of pipe following formula micro drop head that the utility model proposes.

Fig. 2 is the profile according to a kind of irrigate band that the utility model proposes.

Fig. 3 is the profile according to a kind of micro path emitter that the utility model proposes.

Embodiment

Fig. 1 is a kind of profile of pipe following formula micro drop head.This device comprises that shell (1) made by elastic rubber tube; Bluff body (2) is identical by a plurality of diameters, and whippy ball is formed; Inflow entrance (3) is the zone of the porous in shell (1) end, and it not only can the impurity screening particle but also can hinder a grade ball and drop out; Flow export (4) is a hard parts, makes with duroplasts usually, and is tightly connected with shell (1).Its central through hole (5) one ends are communicated with the inner chamber of shell (1), have net grid resistance shelves ball to flow out in the hole; The other end leads to outside the pipe, and irrigation water is from these several outflows.The outer garden alveolus (6) of flow export (4) is used for being tightly connected with the end of water delivery hollow billet (7).Flow export (4) also has an ear position (8) of outwards stretching, and this throttling device is packed into from the end of water delivery hollow billet (7) or takes out with convenient manual operations.Complete micro drop head of the common formation in the end of this throttling device and water delivery hollow billet (7).

Press water at first arrives the end regions of hollow billet (7) with shell (1) and bluff body (2) compression after irrigation operation begins.Press water enters outside the inner chamber of shell (1) and centre bore (5) effuser along the slit between the elasticity glueballs from flow export (4) from inflow entrance (3) simultaneously, when hollow billet (7) end regions variation in water pressure, shell (1) and bluff body (2) all can produce correspondingly tension and relaxation action, make the discharge of this micro drop head keep stable.

Fig. 2 is a kind of profile of irrigate band.This irrigate band be the water-supply-pipe (5) that is connected in pressure water source and on this length of tube direction the compartment of terrain have a plurality of water dropping openings (6).Throttling arrangement shown in Figure 2 is fixed on water dropping openings (6) and locates on the inner surface of water-supply-pipe (5).The structure of this throttling arrangement and throttling arrangement shown in Figure 1 are basic identical, also are by shell (1), and bluff body (2) inflow entrance (3) and flow export (4) are formed.Its main distinction is that the cross section of shell in this device (1) is an ellipse garden shape, flow export (4) is opened on the side direction of shell (1), whole throttling arrangement is attached on the inwall of water-supply-pipe (5), so that the flattening of whole piece irrigate band, bending and coil etc.

Fig. 3 is a kind of profile of micro path emitter.Bluff body (2), inflow entrance (3), flow export (4) and water delivery hollow billet (5) formation that this water dropper also is the shell (1) made by sebific duct, the elasticity glueballs constitutes.Its structure and structural similarity shown in Figure 1, the main distinction are that the inner chamber of the shell (1) of this micro path emitter is made up of the identical chamber of a plurality of sizes.There are net grid (6) to separate between the adjacent chamber, current are passed through, but can hinder grade elasticity glueballs (2) and move.

The characteristics of this structure are that shell (1) can be separately as the whole processing of coiling of the microtubule (7) that drips together with bluff body (2).And at the irrigation operation scene, the required microtubule length of each water dropper then can according to actual water the water yield by hand or special equipment dynamically intercept.The chamber of laterally being cut off on the microtubule that drips, one side form the inflow entrance (3) of this micro path emitter naturally, and opposite side then becomes the part that shell on the next water dropper (1) inserts flow export (4).

Use this micro path emitter can accurately control the water yield of every water dropper in the irrigated area or reduce the cost of drip irrigation emitter significantly.

Claims

1, a kind of being fixed on pressure liquid-transport pipe-line or the container inner wall in order to regulate the throttling arrangement of fluid flow, this device comprises shell, inflow entrance, flow export and bluff body; Described shell be one by outer wall around forming the tubular member of inner chamber, the whole or at least one parts of described outer wall are made of the deformable thin-walled; Described inflow entrance and flow export are tubular member, and there is the fluid passage centre, lay respectively at the two ends of described shell: described inflow entrance is communicated with the inner chamber of pressure liquid-transport pipe-line or container, and described flow export is communicated with outlet on pressure liquid-transport pipe-line or the chamber wall;

It is characterized in that described bluff body is a quantity greater than the block thing of 1 elastomer, by the outer wall of described shell, and described inflow entrance and flow export are limited among the described inner chamber.

2,, it is characterized in that being provided with the cellular barrier in the fluid passage of described inflow entrance and flow export according to the described device of claim 1.

3,, it is characterized in that the block thing of described elastomer is a sphere according to claim 1 or 2 described devices.

4,, it is characterized in that the block thing of described elastomer is a thread according to claim 1 or 2 described devices.

5, according to claim 1 or 2 described devices, it is characterized in that the part of described shell or all outer wall connect with the inwall of pressure liquid-transport pipe-line or container and become one.