CN205298720U - Knapsack sprayer constant pressure valve - Google Patents

Knapsack sprayer constant pressure valve Download PDF

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Publication number
CN205298720U
CN205298720U CN201620039526.5U CN201620039526U CN205298720U CN 205298720 U CN205298720 U CN 205298720U CN 201620039526 U CN201620039526 U CN 201620039526U CN 205298720 U CN205298720 U CN 205298720U
Authority
CN
China
Prior art keywords
valve
rubber
pressure valve
constant pressure
knapsack sprayer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201620039526.5U
Other languages
Chinese (zh)
Inventor
张霞
蔡宗寿
陈颖
熊林
杨彦鑫
张国帅
杨飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yunnan Agricultural University
Original Assignee
Yunnan Agricultural University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yunnan Agricultural University filed Critical Yunnan Agricultural University
Priority to CN201620039526.5U priority Critical patent/CN205298720U/en
Application granted granted Critical
Publication of CN205298720U publication Critical patent/CN205298720U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model provides a knapsack sprayer constant pressure valve, including liquid outlet pipe connector, valve body and feed liquor coupling, the feed liquor coupling be threaded connection with the valve body, and feed liquor coupling bottom is provided with the disk seat, and the center processing of disk seat has the valve opening, in the through -hole of valve body outside -in in proper order concentric installation have rubber inner tube and spring, fixed connection is held to the play liquid of rubber inner tube and spring and valve body, install axially movable's case in the valve opening, have high -pressure valve block, low pressure valve block, rubber diaphragm and spring holder along liquid flow direction coaxial arrangement in proper order on the case. The utility model discloses compact structure, the reliable operation can be in the homogeneity of flow, spraying range and the droplet size of certain within range control atomizer, realizes the requirement that accurate, safety, high efficiency gave medicine to the poor free of charge, can effectively reduce the waste of pesticide and the pollution of environment moreover, improvement pesticide result of use and economic benefits.

Description

A kind of knapsack sprayer constant pressure valve
Technical field
This utility model relates to spraying apparatus parts technical field, particularly relates to a kind of knapsack sprayer constant pressure valve.
Background technology
Knapsack sprayer is the most widely used equipment for plant protection of China, due to its simple in construction, of many uses, low price, is popular with the masses of users. But, due to the defect of this body structure of knapsack sprayer and operation principle aspect, when causing its work, atomisation pressure fluctuation is big, and flow and the quality of spraying are uneven, have impact on the prevention effect of plant pest. Such as, at the hydraulic fluid stroke of piston pump, the gas pressure of air chamber is maximum up to 0.8MPa, and at imbibition stroke, the gas pressure of air chamber is only 0.1MPa. But, research shows when atomisation pressure is more than 0.5MPa, and the flow of spraying becomes big, and fogdrop diameter reduces, and the mist ratio of dripping that diameter is 100��200 ��m producing easily to drift about increases; And when atomisation pressure is less than 0.2MPa, the flow of spraying is little, spray angle reduces, and spraying amplitude narrows. Therefore, constant pressure valve is used to control the atomisation pressure of knapsack sprayer, the uniformity of the flow of aerosol apparatus, spraying amplitude and droplet size can be controlled in certain scope, realize the requirement of dispenser accurate, safe efficient, and can effectively reduce the waste of pesticide and the pollution of environment, improve Pesticide use effect and economic benefit.
Summary of the invention
The purpose of this utility model is in that to solve the defect that above-mentioned prior art exists, it is provided that a kind of knapsack sprayer constant pressure valve.
The purpose of this utility model is realized in, a kind of knapsack sprayer constant pressure valve, including liquid outlet joint, valve body and feed tube joint, the center of liquid outlet joint, valve body and feed tube joint all processes the through hole for fluid flow paths, feed tube joint with valve body for threadeding, it is provided with valve seat bottom feed tube joint, the center processing of valve seat has valve opening, in the through hole of valve body, ecto-entad is provided with that the liquid outlet of rubber inner core and spring, rubber inner core and spring and valve body is fixing to be connected successively with one heart; The spool being axially movable is installed in valve opening, spool is sequentially coaxially provided with along liquid flow direction high pressure valve block, low pressure valve block, diaphragm of rubber and spring base.
A kind of knapsack sprayer constant pressure valve that this utility model provides, compact conformation, reliable operation, the uniformity of the flow of aerosol apparatus, spraying amplitude and droplet size can be controlled in certain scope, realize the requirement of dispenser accurate, safe efficient, and can effectively reduce the waste of pesticide and the pollution of environment, improve Pesticide use effect and economic benefit.
Accompanying drawing explanation
Fig. 1 is this utility model overall structure schematic diagram.
In figure: 1-liquid outlet joint, 2-valve body, 3-rubber inner core, 4-spring, 5-spring base, 6-diaphragm of rubber, 7-low pressure valve block, 8-valve seat, 9-high pressure valve block, 10-feed tube joint.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearly, below technical scheme in this utility model be clearly and completely described, it is clear that described embodiment is a part of embodiment of this utility model, rather than whole embodiments. Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of this utility model protection.
As shown in Figure 1, a kind of knapsack sprayer constant pressure valve that this utility model provides, including liquid outlet joint 1, valve body 2 and feed tube joint 10, the center of liquid outlet joint 1, valve body 2 and feed tube joint 10 all processes the through hole for fluid flow paths, it is characterized in that: feed tube joint 10 with valve body 2 for threadeding, valve seat 8 it is provided with bottom feed tube joint 10, the center processing of valve seat 8 has valve opening, in the through hole of valve body 2, ecto-entad is provided with that the liquid outlet of rubber inner core 3 and spring 4, rubber inner core 3 and spring 4 and valve body 2 is fixing to be connected successively with one heart; The spool being axially movable is installed in valve opening, spool is sequentially coaxially provided with along liquid flow direction high pressure valve block 9, low pressure valve block 7, diaphragm of rubber 6 and spring base 5.
Further, being provided with supporting station inside valve body 2 liquid outlet, on supporting station, processing has the mounting groove for installing rubber inner core 3 leg, with the displacement of fixing rubber inner core 3 circumferencial direction, leaves fluid flow paths between supporting station and rubber inner core 3.
Further, the liquid outlet side circumferencial direction of valve seat 8 is uniform is provided with projection pressure head, and pressure head directly bears against on diaphragm of rubber 6, for fixing the axial displacement of rubber inner core 3, leaves fluid flow paths between valve seat 8 and diaphragm of rubber 6.
Further, rubber inner core 3 is installed with base by inside liquid outlet side, and spring 4 is arranged between base and spring base 5.
Further, the distance between high pressure valve block 9 and low pressure valve block 7 is more than the thickness of valve seat 8.
Further, valve body 2 is connected with feed tube joint 10 with external screw thread, is provided with gasket seal between valve body 2 end face and feed tube joint 10. Feed tube joint 10 one end is connected with valve body 2 with female thread, and the other end is connected with spraying rod for sprayer joint with female thread.
Further, described valve opening is manhole.
During work, medicinal liquid is under the effect of aerosol apparatus air chamber pressure, and by entering tube for transfusion, spray boom enters into constant pressure valve feed tube joint 10. When medicinal liquid pressure is lower than low-voltage rated pressure, low pressure valve block 7 is close to valve seat 8 under the effect of spring 4 pressure, and valve opening is closed, and aerosol apparatus quits work; When medicinal liquid pressure increases to constant pressure valve low-voltage rated pressure, low pressure valve 7 overcomes spring force to be moved to the left under the effect of medicinal liquid pressure, and valve opening is opened, and aerosol apparatus is started working; When medicinal liquid pressure is further increased to high pressure rated pressure, high pressure valve block 9 is moved farther leftward as under medicine action of hydraulic force, and high pressure valve block 9 and valve seat 8 are adjacent to, and valve opening is closed again, and aerosol apparatus quits work.
So, under the effect of this utility model knapsack sprayer constant pressure valve, only medicinal liquid pressure is when rated range, and aerosol apparatus just can carry out spraying operation. Use constant pressure valve can control the atomisation pressure of knapsack sprayer, the uniformity of the flow of aerosol apparatus, spraying amplitude and droplet size is controlled in certain scope, realize the requirement of dispenser accurate, safe efficient, and can effectively reduce the waste of pesticide and the pollution of environment, improve Pesticide use effect and economic benefit.
Last it is noted that above example is only in order to illustrate the technical solution of the utility model, it is not intended to limit; Although this utility model being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent replacement; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of this utility model.

Claims (7)

1. a knapsack sprayer constant pressure valve, including liquid outlet joint (1), valve body (2) and feed tube joint (10), liquid outlet joint (1), the center of valve body (2) and feed tube joint (10) all processes the through hole for fluid flow paths, it is characterized in that: feed tube joint (10) with valve body (2) for threadeding, feed tube joint (10) bottom is provided with valve seat (8), the center processing of valve seat (8) has valve opening, in the through hole of valve body (2), ecto-entad is provided with rubber inner core (3) and spring (4) successively with one heart, rubber inner core (3) and spring (4) are fixing with the liquid outlet of valve body (2) to be connected, the spool being axially movable is installed in valve opening, spool is sequentially coaxially provided with along liquid flow direction high pressure valve block (9), low pressure valve block (7), diaphragm of rubber (6) and spring base (5).
2. a kind of knapsack sprayer constant pressure valve according to claim 1, it is characterized in that: inside valve body (2) liquid outlet, be provided with supporting station, on supporting station, processing has the mounting groove for installing rubber inner core (3) leg, with the displacement of fixing rubber inner core (3) circumferencial direction, between supporting station and rubber inner core (3), leave fluid flow paths.
3. a kind of knapsack sprayer constant pressure valve according to claim 1, it is characterized in that: the liquid outlet side circumferencial direction of valve seat (8) is uniform is provided with projection pressure head, pressure head directly bears against on diaphragm of rubber (6), for fixing the axial displacement of rubber inner core (3), between valve seat (8) and diaphragm of rubber (6), leave fluid flow paths.
4. a kind of knapsack sprayer constant pressure valve according to claim 1, it is characterised in that: rubber inner core (3) is by being installed with base inside liquid outlet side, spring (4) is arranged between base and spring base (5).
5. a kind of knapsack sprayer constant pressure valve according to claim 1, it is characterised in that: the distance between high pressure valve block (9) and low pressure valve block (7) is more than the thickness of valve seat (8).
6. a kind of knapsack sprayer constant pressure valve according to claim 1, it is characterised in that: valve body (2) is connected with feed tube joint (10) with external screw thread, is provided with gasket seal between valve body (2) end face and feed tube joint (10).
7. a kind of knapsack sprayer constant pressure valve according to claim 1, it is characterised in that: described valve opening is manhole.
CN201620039526.5U 2016-01-18 2016-01-18 Knapsack sprayer constant pressure valve Expired - Fee Related CN205298720U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620039526.5U CN205298720U (en) 2016-01-18 2016-01-18 Knapsack sprayer constant pressure valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620039526.5U CN205298720U (en) 2016-01-18 2016-01-18 Knapsack sprayer constant pressure valve

Publications (1)

Publication Number Publication Date
CN205298720U true CN205298720U (en) 2016-06-08

Family

ID=56476265

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201620039526.5U Expired - Fee Related CN205298720U (en) 2016-01-18 2016-01-18 Knapsack sprayer constant pressure valve

Country Status (1)

Country Link
CN (1) CN205298720U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110177602A (en) * 2017-01-12 2019-08-27 德国美力有限两合公司 Constant pressure valve and alarm valve station and self-extinguishing equipment with constant pressure valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110177602A (en) * 2017-01-12 2019-08-27 德国美力有限两合公司 Constant pressure valve and alarm valve station and self-extinguishing equipment with constant pressure valve

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160608

Termination date: 20170118