CN205018143U - Dripping proof valve - Google Patents
Dripping proof valve Download PDFInfo
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- CN205018143U CN205018143U CN201520776875.0U CN201520776875U CN205018143U CN 205018143 U CN205018143 U CN 205018143U CN 201520776875 U CN201520776875 U CN 201520776875U CN 205018143 U CN205018143 U CN 205018143U
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Abstract
The utility model relates to a dripping proof valve, wherein, dripping proof valve include bellows, cylinder and disk seat, the bellows first end with the first port of disk seat be connected, the bellows second end with the gas vent of cylinder be connected, the air inlet of cylinder be connected with compressed air, the second port of disk seat be connected with the nozzle, the second port of disk seat be connected with liquid interpolation pump, the bellows be welded bellows. Adopt the dripping proof valve of this kind of structure, it is antidrip effectual, and simple structure, longe -lived, the cost of manufacture is low, and is small, simple to operate, and the range of application is extensive.
Description
Technical field
The utility model relates to mechanical field, particularly relates to liquid batch and adds equipment, spraying equipment, specifically refer to a kind of anti-dripping valve.
Background technology
Nowadays, in the every field of prior art, when liquid (or raw material), after the amount arrival setting value of spraying, the residual liquid around nozzle continues drippage, can have a strong impact on the quality of product.
Especially in agricultural production, in order to protect Crop securify, health, the high place of production growth, the control of disease, worm, crop smothering is absolutely necessary, in order to prevent cure the disease, worm, crop smothering, need to spray various agricultural chemicals to crops.No matter be biopesticide, organic agricultural chemicals, safety pesticide or chemical pesticide, spray that these agricultural chemicals are requisite will adopt pesticide dispersal equipment.Spray bar type spraying machine is a kind of common pesticide dispersal equipment, and spray bar type spraying machine is a kind of by the engine-driven atomiser of cartridge nozzle on horizontal spray boom or setting spray boom.The operating efficiency of spray bar type spraying machine is high, sprinkling quality is good, spouting liquid is evenly distributed, and applicable large area sprays the liquid formulation of various agricultural chemicals, fertilizer and plant growth regulation etc., is widely used in field crop, lawn, nursery, wall-vineyard and specific occasion.
Spray bar type spraying machine in existing technology; usually shower nozzle is directly installed on the outlet end of spray boom; spray bar type spraying machine shutting down, shift, keep in repair, add water, in the process such as dosing; liquid in pipeline is constantly outflowed by shower nozzle; thus cause the waste of liquid and liquid to the pollution of surrounding environment; especially for some go out natural disposition and optionally liquid; may cause that crop is long, weeds are not long; poisoning is the longest reaches 3 years; namely do not grow grass and crop in 3 years by liquid medicine contamination district, harm is serious.
Along with the application of anti-dripping valve and the appearance of corresponding local regulation, the shower nozzle of spray bar type spraying machine does not assemble anti-dripping valve is forbidden to enter field work, and above-mentioned pollution situation makes moderate progress.But existing anti-dripping valve rustic, antidrip effect is poor, still has part liquid and flows out from shower nozzle, still have part liquid and be wasted, and these liquids flowed out still can pollute surrounding environment.
Utility model content
The purpose of this utility model is the shortcoming overcoming above-mentioned prior art, provide a kind of spray equipment stop after the anti-dripping valve of no longer dropping liquid.
To achieve these goals, anti-dripping valve of the present utility model has following formation:
This anti-dripping valve, its main feature is, described anti-dripping valve comprises bellows, cylinder and valve seat; The first end of described bellows is connected with the first port of described valve seat, second end of described bellows is connected with the exhaust outlet of described cylinder, the air inlet of described cylinder is connected with compressed air, second port of described valve seat is connected with nozzle, and the second port of described valve seat is connected with pump for adding liquid.
Further, described bellows is welding bellows.
Further, described anti-dripping valve also comprises a guide pipe, described guide pipe is sheathed on the outside of described welding bellows, slide along the inwall of described guide pipe to make described welding bellows, and the first end of described guide pipe is tightly connected mutually with described valve seat, the second end of described guide pipe is tightly connected mutually with described cylinder.
Further, described cylinder is connected with described compressed air by a two-position three way magnetic valve.
Further, the second port of described valve seat is connected with pump for adding liquid by the two-position two-way solenoid valve of an one-way conduction.
Have employed the anti-dripping valve in this utility model, compared with prior art, there is following useful technique effect:
1) antidrip effective;
2) anti-dripping valve structure is simple, and the life-span is long, low cost of manufacture;
3) volume is little, easy for installation.
Accompanying drawing explanation
Fig. 1 is the structural representation of anti-dripping valve in an embodiment of the present utility model.
Fig. 2 is the structural representation of anti-dripping valve when spray equipment works in an embodiment of the present utility model.
Fig. 3 is the structural representation of anti-dripping valve when spray equipment quits work in an embodiment of the present utility model.
Wherein,
1 welding bellows
2 cylinders
3 valve seats
4 nozzles
5 pump for adding liquids
6 guide pipes
7 two-position three way magnetic valves
8 two-position two-way solenoid valves
Embodiment
In order to more clearly describe technology contents of the present utility model, conduct further description below in conjunction with specific embodiment.
In the utility model, anti-dripping valve adopts is inverted Method for Installation, and during suck-back, volume increases, nozzle 4 forefront pressure removal.
Anti-dripping valve comprises can reciprocating welding bellows 1, welding bellows 1 is allowed to produce reciprocating cylinder 2, the guide pipe 6 (because welding bellows 1 is axially softer, so want guide pipe 6 normally to stretch) be used for as welding bellows 1 leads, valve seat 3 and other annexes.
The realization of anti-dripping valve function depends primarily on the technical characteristic of welding bellows 1.
Welding bellows is a kind of by many thin type hollow membrane shaping with impact style, utilizes the high-fidelity made by precision welding and flexible metal tube.Welding bellows 1 has following characteristic: withstand voltage, heatproof, corrosion-resistant, good airproof performance, and the bellows than tradition shaping also has two outstanding advantages: deflection is large, the life-span is long.
Refer to shown in Fig. 2, when spray equipment starts, two-position three way magnetic valve 7 obtains electric simultaneously, and cylinder 2 push rod stretches out, and welding bellows 1 is in confined state, and cavity volume diminishes; Two-position two-way solenoid valve 8 one-way conduction, spray equipment normally works.
Refer to shown in Fig. 3, when pump for adding liquid 5 stops, cylinder 2 pusher retracted simultaneously, welding bellows 1 relies on the elasticity of self naturally to extend, cavity volume becomes large, thus creating suck-back power, the soldered bellows 1 of residual liquid be in around nozzle 4 absorbs, and prevents the generation of nozzle 4 dropping liquid phenomenon.
During unlatching spray equipment, cylinder 2 stretches out again, and the liquid that soldered bellows 1 absorbs is discharged, and so periodic work, prevents the generation of dropping liquid phenomenon.
In a kind of preferred embodiment, the following condition of selection demand fulfillment of cylinder 2:
(1) minimum thrust of cylinder 2
According to the pressure in nozzle 4, the minimum thrust that cylinder 2 needs can be extrapolated, cylinder 2 cylinder diameter can be determined.
(2) effective travel
Need the distance of suck-back (the L length in Fig. 2) that the effective travel of cylinder 2 can be extrapolated according to nozzle 4 and liquid.
In a kind of preferred embodiment, the following condition of selection demand fulfillment of welding bellows 1:
(1) sealing of welding bellows 1
This anti-dripping valve need utilize the sealing of welding bellows 1 absorb liquid and discharge, so welding bellows 1 and can not have leakage phenomenon with the junction of welding bellows.
(2) good springiness
This anti-dripping valve needs to move back and forth, so elasticity will be got well.Concrete reciprocating motion number of times (or life-span) can be determined according to the frequency of nozzle 4 periodic switch.
(3) intensity will be got well
This anti-dripping valve needs to bear certain pressure, so welding bellows 1 needs certain intensity, the great power of concrete needs, needs to calculate according to the pressure in nozzle 4.
(4) material of welding bellows 1 is selected according to the character of liquid (acid, alkaline etc.).
(5) need internal diameter and the length of the position calculation bellows of suck-back according to the diameter of fluid pipeline and liquid, anti-dripping valve has suitable volume just can complete release and antidrip.
When liquid spraying equipment completes the spraying operation of one-period, nozzle quits work and anti-dripping valve starts, thus make the state of welding bellows change elongation state into from by compression, at this moment welding bellows volume is large from little change, create suck-back power, thus can absorption nozzle surrounding liquid, force the residual liquid at nozzle place to enter welding bellows, prevent nozzle dropping liquid phenomenon to occur, ensure that the quality of product.
Have employed the anti-dripping valve in this utility model, compared with prior art, there is following useful technique effect:
1) antidrip effective;
2) anti-dripping valve structure is simple, and the life-span is long, low cost of manufacture;
3) volume is little, easy for installation.
Above-described embodiment is this patent preferred embodiment; not be used for limiting practical range of the present utility model; those skilled in the art is under the prerequisite not departing from the utility model principle; the improvement done, change, combination, substitute etc., all belong within the utility model claim scope required for protection.
In this description, the utility model is described with reference to its specific embodiment.But, still can make various amendment and conversion obviously and not deviate from spirit and scope of the present utility model.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (5)
1. an anti-dripping valve, is characterized in that, described anti-dripping valve comprises bellows, cylinder and valve seat; The first end of described bellows is connected with the first port of described valve seat, second end of described bellows is connected with the exhaust outlet of described cylinder, the air inlet of described cylinder is connected with compressed air, second port of described valve seat is connected with nozzle, and the second port of described valve seat is connected with pump for adding liquid.
2. anti-dripping valve according to claim 1, is characterized in that, described bellows is welding bellows.
3. anti-dripping valve according to claim 2, it is characterized in that, described anti-dripping valve also comprises a guide pipe, described guide pipe is sheathed on the outside of described welding bellows, slide along the inwall of described guide pipe to make described welding bellows, and the first end of described guide pipe is tightly connected mutually with described valve seat, the second end of described guide pipe is tightly connected mutually with described cylinder.
4. anti-dripping valve according to claim 1, is characterized in that, described cylinder is connected with described compressed air by a two-position three way magnetic valve.
5. anti-dripping valve according to claim 1, is characterized in that, the second port of described valve seat is connected with pump for adding liquid by the two-position two-way solenoid valve of an one-way conduction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520776875.0U CN205018143U (en) | 2015-10-08 | 2015-10-08 | Dripping proof valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520776875.0U CN205018143U (en) | 2015-10-08 | 2015-10-08 | Dripping proof valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205018143U true CN205018143U (en) | 2016-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520776875.0U Active CN205018143U (en) | 2015-10-08 | 2015-10-08 | Dripping proof valve |
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| CN (1) | CN205018143U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105123661A (en) * | 2015-10-08 | 2015-12-09 | 上海曼孚机电控制工程有限公司 | Anti-dripping valve |
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2015
- 2015-10-08 CN CN201520776875.0U patent/CN205018143U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105123661A (en) * | 2015-10-08 | 2015-12-09 | 上海曼孚机电控制工程有限公司 | Anti-dripping valve |
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