CN105065694A - Valve for agricultural machine - Google Patents
Valve for agricultural machine Download PDFInfo
- Publication number
- CN105065694A CN105065694A CN201510417954.7A CN201510417954A CN105065694A CN 105065694 A CN105065694 A CN 105065694A CN 201510417954 A CN201510417954 A CN 201510417954A CN 105065694 A CN105065694 A CN 105065694A
- Authority
- CN
- China
- Prior art keywords
- valve head
- valve
- main valve
- head
- main
- 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.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
- F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention provides a valve for an agricultural machine. The valve comprises a hydraulic cylinder, a linear valve rod, a valve body, an auxiliary valve head and a main valve head. The main valve head is located in the valve body. A shaft sleeve is arranged between the valve rod and a rack. An edge is arranged on the top face of the shaft sleeve. A friction sleeve is arranged on the inner wall of the rack, and the edge and the friction sleeve make contact to form a friction face. According to the valve, the main valve head and the auxiliary valve head are matched; long-term practice proves that the valve is safer, more reliable and longer in service life. Through the friction sleeve, the valve can be safely and stably opened.
Description
Technical field
The present invention relates to a kind of farm machinery valve, belong to field of mechanical technique.
Background technique
Medium is the valve of liquid is be widely used in the industry equipment of agricultural mechanical field for conveying liquid body medium.When valve aperture comparatively large (bore is greater than 100mm) and under pressure medium is high pressure (PN2.5 ~ 6.4MPa) operating mode, medium is high by the pressure of valve, flow velocity is fast, flow is large, usually with the ball valve, stop valve etc. of hard sealing under this operating mode, in general, valve operating mechanism is complicated, more slowly and easily occur some problems, there is the phenomenons such as " water hammer ", valve head rapid wear, valve rod are bending in as tight in valve closing, downstream line to opening and closing speed.Therefore, a kind of valve of safe and reliable, long service life, has certain meaning to raising industrial production benefit and safety in production.
Summary of the invention
The invention provides a kind of farm machinery valve, high-pressure high-flow that is safe and reliable, long service life opens hydraulic valve soon.
For realizing the above, technological scheme provided by the invention is as follows: a kind of farm machinery valve, comprise oil hydraulic cylinder, straight line valve rod, valve body, auxiliary valve head and main valve head, main valve head is positioned at valve body, the inner chamber of main valve head is formed towards the lateral opening carrying out flow path direction at described main valve head, auxiliary valve head is positioned at the inner chamber of main valve head, and straight line valve rod one end is positioned at oil hydraulic cylinder, and the straight line valve rod the other end is fixedly connected with auxiliary valve head through main valve head; Drive auxiliary valve head and main valve head motion by oil hydraulic cylinder and straight line valve rod, realize the opening and closing of valve; The outer surface of described auxiliary valve head and main valve head is cylindrical, and described auxiliary valve head, the axis of main valve head and the axis of valve rod are on same straight line; Described main valve head is column type " the horse degree of lip-rounding ", forms the first circular hole in the center portion, upper-end surface of main valve head, forms the second circular hole in the center portion, lower end surface of main valve head, and the diameter of described auxiliary valve head is larger than the diameter of described circular hole; Be provided with axle sleeve between described valve rod and frame, the end face of axle sleeve is provided with edge, and frame inner wall is provided with friction sleeve, and edge contacts with friction sleeve formation rubbing surface.
Further, described main valve head is column type " the horse degree of lip-rounding ", forms the first circular hole in the center portion, upper-end surface of main valve head, forms the first circular hole in the center portion, lower end surface of main valve head, and the diameter of described auxiliary valve head is larger than the diameter of described circular hole.
Further, the perforated area of described second circular hole is 12% ~ 18% of valve drift diameter area.
Further, described auxiliary valve head and main valve head all adopt hard, wear-resistant alloy.
Further, described oil hydraulic cylinder is medium to auxiliary valve head and main valve head pressure to the normal thrust of valve rod or pulling force 1.3 to 1.5 times.
Accompanying drawing explanation
Fig. 1 is the sectional view of farm machinery valve of the present invention.
Embodiment
High-pressure high-flow hydraulic valve of the present invention comprises oil hydraulic cylinder 1, straight line valve rod 2, valve body 3, auxiliary valve head 4 and main valve head 5, main valve head 5 is positioned at valve body 3, the inner chamber of main valve head 5 is formed towards the lateral opening carrying out flow path direction at described main valve head 5, auxiliary valve head 4 is positioned at the inner chamber of main valve head 5, auxiliary valve head 4 is positioned at main valve head 5 inner chamber, straight line valve rod 2 one end is positioned at oil hydraulic cylinder 1, and straight line valve rod 2 the other end is fixedly connected with auxiliary valve head 4 through main valve head 5; First drive auxiliary valve head 4 to move by oil hydraulic cylinder 1 and straight line valve rod 2, then drive main valve head 5 to move, realize the opening and closing of valve.When valve closing, the lower surface of auxiliary valve head 4 contacts with main valve head 5, and the auxiliary upper surface of valve head 4 and the upper surface of main valve head 5 inner chamber have certain distance; When valve opening, straight line valve rod 2 first drives auxiliary valve head 4 to move up to and contacts with main valve head 5, and then drives main valve head 5 to move upward; When valve closing, straight line valve rod 2 drives auxiliary valve head 4 and main valve head 5 to move downward; Be provided with axle sleeve between described valve rod and frame, the end face of axle sleeve is provided with edge, and frame inner wall is provided with friction sleeve 6, and edge contacts with friction sleeve formation rubbing surface.
The outer surface of described auxiliary valve head 4 and main valve head 5 is cylindrical, and the axis of described auxiliary valve head 4, main valve head 5 and the axis of valve rod 2 are on same straight line.Described main valve head 5 is column type " the horse degree of lip-rounding ", described main valve head 5 towards the lateral opening carrying out flow path direction, above described main valve head 5, below center portion open a circular hole respectively, the diameter of described auxiliary valve head 4 is larger than the diameter of described circular hole.The size being positioned at the circular hole of lower end surface depends on that the size of pressure medium and flow, general perforated area are valve drift diameter area 10% ~ 20%.Auxiliary valve head 4 size is advisable with salable main valve head 5 lower end surface perforate.
Oil hydraulic cylinder 1 is positioned at above valve body, for the opening and closing of valve provides power.Valve rod 2 is threaded with auxiliary valve head 4, and it is fastening to use pin to locate.
When valve closing, the distance of described auxiliary valve head 4 upper-end surface and the inner chamber upper surface of main valve head 5 is generally 10 ~ 15mm.
Described auxiliary valve head 4 all adopts hard, wear-resistant alloy with main valve head 5.
The normal thrust of described oil hydraulic cylinder 1 pair of valve rod 2 or pulling force are that medium is to auxiliary valve head 4 and main valve head 5 pressure 1.3 ~ 1.5 times.
When high-pressure liquid working medium needs to flow into downstream from valve downstream (direction of arrow A), by oil hydraulic cylinder upwardly valve rod substep Open valve, first auxiliary valve head is opened, open main valve head again, the valve not only realized under high-pressure high-flow liquid medium condition is opened fast, also solves " water hammer " effect of downstream line when opening soon, when needing throttle down, promote valve rod downwards by oil hydraulic cylinder, drive auxiliary valve head and main valve head motion, realize the quick closedown of valve.Valve of the present invention can meet the demand under high-pressure high-flow liquid medium operating mode, particularly can meet valve aperture comparatively large (bore is greater than 100mm) and pressure medium is the demand under high pressure (PN2.5 ~ 6.4MPa) operating mode.
Claims (4)
1. a farm machinery valve, it is characterized in that: comprise oil hydraulic cylinder, straight line valve rod, valve body, auxiliary valve head and main valve head, main valve head is positioned at valve body, the inner chamber of main valve head is formed towards the lateral opening carrying out flow path direction at described main valve head, auxiliary valve head is positioned at the inner chamber of main valve head, straight line valve rod one end is positioned at oil hydraulic cylinder, and the straight line valve rod the other end is fixedly connected with auxiliary valve head through main valve head; Drive auxiliary valve head and main valve head motion by oil hydraulic cylinder and straight line valve rod, realize the opening and closing of valve; The outer surface of described auxiliary valve head and main valve head is cylindrical, and described auxiliary valve head, the axis of main valve head and the axis of valve rod are on same straight line; Described main valve head is column type " the horse degree of lip-rounding ", forms the first circular hole in the center portion, upper-end surface of main valve head, forms the second circular hole in the center portion, lower end surface of main valve head, and the diameter of described auxiliary valve head is larger than the diameter of described circular hole; Be provided with axle sleeve between described valve rod and frame, the end face of axle sleeve is provided with edge, and frame inner wall is provided with friction sleeve, and edge contacts with friction sleeve formation rubbing surface.
2. farm machinery valve according to claim 1, is characterized in that: the perforated area of described second circular hole is 12% ~ 18% of valve drift diameter area.
3. farm machinery valve according to claim 1, is characterized in that: described auxiliary valve head and main valve head all adopt hard, wear-resistant alloy.
4. farm machinery valve according to claim 1, is characterized in that: 1.3 to 1.5 times that described oil hydraulic cylinder is medium to auxiliary valve head and main valve head pressure to the normal thrust of valve rod or pulling force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510417954.7A CN105065694A (en) | 2015-07-16 | 2015-07-16 | Valve for agricultural machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510417954.7A CN105065694A (en) | 2015-07-16 | 2015-07-16 | Valve for agricultural machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105065694A true CN105065694A (en) | 2015-11-18 |
Family
ID=54495144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510417954.7A Pending CN105065694A (en) | 2015-07-16 | 2015-07-16 | Valve for agricultural machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105065694A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3888280A (en) * | 1973-08-20 | 1975-06-10 | Rockwell International Corp | Bi-directional pressure balanced valve |
| CN2055551U (en) * | 1989-09-21 | 1990-04-04 | 沈阳市第三阀门厂 | Hydraulic rubber-lining stop valve |
| CN202418601U (en) * | 2011-11-30 | 2012-09-05 | 江苏江分电分析仪器有限公司 | Large-diameter shutoff valve |
| CN103123004A (en) * | 2013-01-21 | 2013-05-29 | 中国航天空气动力技术研究院 | Hydraulic valve with high pressure and large flow |
-
2015
- 2015-07-16 CN CN201510417954.7A patent/CN105065694A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3888280A (en) * | 1973-08-20 | 1975-06-10 | Rockwell International Corp | Bi-directional pressure balanced valve |
| CN2055551U (en) * | 1989-09-21 | 1990-04-04 | 沈阳市第三阀门厂 | Hydraulic rubber-lining stop valve |
| CN202418601U (en) * | 2011-11-30 | 2012-09-05 | 江苏江分电分析仪器有限公司 | Large-diameter shutoff valve |
| CN103123004A (en) * | 2013-01-21 | 2013-05-29 | 中国航天空气动力技术研究院 | Hydraulic valve with high pressure and large flow |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151118 |
|
| RJ01 | Rejection of invention patent application after publication |