CN108953709A - A kind of unloading valve - Google Patents
A kind of unloading valve Download PDFInfo
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- CN108953709A CN108953709A CN201811134286.7A CN201811134286A CN108953709A CN 108953709 A CN108953709 A CN 108953709A CN 201811134286 A CN201811134286 A CN 201811134286A CN 108953709 A CN108953709 A CN 108953709A
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The present invention proposes a kind of unloading valve, comprising: valve body, swivel nut, the first adjusting rod, the second adjusting rod, valve seat, valve pocket, off-load spool, unloading spring, overflow spool, overflow spring, check valve sheet, unidirectional spring.A kind of unloading valve according to an embodiment of the present invention, volume compact, the processing is simple, and manufacturing cost is low.
Description
Technical field
The present invention relates to a kind of valve modules of hydraulic device, relate in particular to a kind of unloading valve.
Background technique
Duplex hydraulic pump is usually used in the special purpose machine tool for having the machining of fast feed and work feed requirement, at this moment double
Connection pump by a high-pressure low-flow hydraulic pump and a low pressure and mass flow hydraulic pressure pump group at.When fast feed, two hydraulic pumps are simultaneously
Fuel feeding (pressure is lower at this time), when work feed, by the hydraulic oil pump feed of high-pressure low-flow (pressure is higher at this time), while in oil
Make high-capacity pump off-load in the system of road, this can save the energy compared with using the pump of a high-pressure high-flow, reduce oil liquid hair
Heat.In the prior art, work feed is transformed by fast feed to control duplex hydraulic pump frequently with off-load valve group, makes low pressure
High-capacity pump carries out off-load, and existing off-load valve group is generally integrated into a valve block by independent check valve, overflow valve, unloading valve
On, it is bulky, with high costs.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, an object of the present invention is to provide a kind of volume compact, the processing is simple, the low off-load of manufacturing cost
Valve.
A kind of unloading valve according to an embodiment of the present invention, comprising:
Valve body, the valve body have valve hole up and down, and the valve hole includes the first valve body from top to bottom
Through hole section, the second valve hole section, third valve hole section, the 4th valve hole section and the 5th valve hole section, described first
The aperture of valve hole section is greater than the aperture of the second valve hole section, and the aperture of the second valve hole section is greater than described
The aperture of third valve hole section, the aperture of the third valve hole section are less than the aperture of the 4th valve hole section, institute
The aperture for stating the 4th valve hole section is less than the aperture of the 5th valve hole section, has the first hydraulic fluid port and the on the valve body
Two hydraulic fluid ports, first hydraulic fluid port are connected to the second valve hole section, and second hydraulic fluid port is connected to the 4th valve hole section；
Swivel nut, the lower end of the swivel nut be plugged in the first valve hole section and the lower end surface of the swivel nut with it is described
The top bar face interval preset distance of second valve hole section, the swivel nut have swivel nut through-hole up and down, the swivel nut
Through-hole includes the first swivel nut through hole section and the second swivel nut through hole section from top to bottom, and the aperture of the first swivel nut through hole section is less than institute
State the aperture of the second swivel nut through hole section；
First adjusting rod, first adjusting rod include the upper pole part fitted in the first swivel nut through hole section and adaptation
In the lower bar portion of the second swivel nut through hole section, the upper pole part is threadedly engaged with the first swivel nut through hole section and the upper boom
The upper end in portion is projected upwards in the upper surface of the swivel nut, and the lower bar portion is slidably matched with the second swivel nut through hole section, institute
The first adjusting rod is stated with adjusting rod through-hole up and down, the adjusting rod through-hole includes top-down screw thread hole section and cunning
Dynamic hole section；
Second adjusting rod, second adjusting rod and the screw thread hole section are threadedly engaged and the upper end of second adjusting rod
It projects upwards in the upper surface of first adjusting rod；
Valve seat, described valve seat cooperation is in the 5th valve hole section and the outer peripheral surface of the valve seat is against the described 5th
The internal perisporium of valve hole section has valve seat central through hole and the first through flow hole up and down, the valve seat on the valve seat
The aperture of central through hole is equal to the aperture of the third valve hole section；
Valve pocket, the upper end of the valve pocket be plugged in the 5th valve hole section so that the valve seat upper surface against
The leave from office terrace of the 4th valve hole section, the valve pocket have a valve pocket through-hole up and down, and the valve pocket through-hole is from upper
And lower includes the first valve pocket through hole section, the second valve pocket through hole section and third valve pocket through hole section, the hole of the first valve pocket through hole section
Diameter is equal to the 4th valve hole section, and the aperture of the first valve pocket through hole section is greater than the hole of the second valve pocket through hole section
Diameter, the aperture of the second valve pocket through hole section are greater than the aperture of the third valve pocket through hole section, the third valve pocket through hole section
Under shed is configured to third hydraulic fluid port；
Off-load spool, the off-load spool include the sliding that can slide up and down to Pei He in the valve seat central through hole
Section, positioned at the upper surface of described glissile segment and with the undergauge section of the third valve hole section clearance fit and be located at the contracting
The upper surface of diameter section and extension diameter section with the second valve hole section clearance fit, the off-load spool have the up and down
Two through flow holes；
Unloading spring, the internal perisporium clearance fit of the periphery wall of the unloading spring and the second valve hole section, institute
The upper end of unloading spring is stated against the lower end of first adjusting rod and the lower end of the unloading spring is against the off-load spool
Upper end, the unloading spring often pushes the off-load spool downwards so that the lower end surface of the extension diameter section is against the third valve
The top bar of body through hole section to often close the upper opening of the third valve hole section, at this point, the lower end of the glissile segment to
It is lower to stretch out the valve seat and protrude into the second valve pocket through hole section；
Overflow spool, the overflow spool are located in the unloading spring and positioned at the upper surface of described off-load spool；
Overflow spring, the overflow spring are located in the unloading spring, and the upper end of the overflow spring is against described
The lower end of two adjusting rods and the lower end of the overflow spring are against the overflow spool, described in the overflow spring often pushes downwards
It is logical that the lower end surface of overflow spool the above overflow spool often closes described second against the upper surface of the off-load spool
The upper opening of discharge orifice；
Check valve sheet, the check valve sheet can slide up and down to below the valve seat to be socketed on the glissile segment,
The outer diameter of the check valve sheet is less than the aperture of the first valve pocket through hole section and the outer diameter of the check valve sheet is greater than described the
The aperture of two valve pocket through hole sections；
Unidirectional spring, the upper end of the unidirectional spring are socketed in the lower end of the glissile segment and against the check valve sheets
Lower end surface, against the terrace of appearing on the stage of the third valve pocket through hole section, the unidirectional spring is normal upwards for the lower end of the unidirectional spring
The check valve sheet is pushed so that the check valve sheet often closes the under shed of first through flow hole.
Advantageously, the unloading valve further includes spring base, and the spring base, which can slide up and down to, is located at the sliding eye
In section and the spring base is located between the lower end of second adjusting rod and the upper end of the overflow spring.
Advantageously, first through flow hole is multiple, multiple first through flow holes around the valve seat central through hole
Circumferential uniform intervals along the valve seat are arranged.
Advantageously, the extension diameter section is configured to the round table-like extension diameter section that outer diameter is sequentially increased from bottom to top, described round table-like
The lower end of extension diameter section extends downwardly into the third valve hole section.
Advantageously, the overflow spool is configured to vertex coniform overflow spool directed downwardly, the coniform overflow spool
Lower end extend downwardly into second through flow hole.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of unloading valve according to an embodiment of the invention；
Fig. 2 is the hydraulic schematic diagram of unloading valve according to an embodiment of the invention；
Fig. 3 is the hydraulic schematic diagram of an application scenarios of unloading valve according to an embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings it is described in detail unloading valve according to an embodiment of the present invention.
As shown in Figure 1 to Figure 3, a kind of unloading valve according to an embodiment of the present invention, comprising: valve body 1, swivel nut 2, first is adjusted
Bar 3, the second adjusting rod 13, valve seat 6, valve pocket 9, off-load spool 4, unloading spring 10, overflow spool 5, overflow spring 11, check valve
Piece 7, unidirectional spring 8.
Specifically, valve body 1 has valve hole up and down, the valve hole includes the first valve body from top to bottom
Through hole section, the second valve hole section, third valve hole section, the 4th valve hole section and the 5th valve hole section, described first
The aperture of valve hole section is greater than the aperture of the second valve hole section, and the aperture of the second valve hole section is greater than described
The aperture of third valve hole section, the aperture of the third valve hole section are less than the aperture of the 4th valve hole section, institute
The aperture for stating the 4th valve hole section is less than the aperture of the 5th valve hole section.There is the first hydraulic fluid port T and second on valve body 1
Hydraulic fluid port P, the first hydraulic fluid port T are connected to the second valve hole section, and the second hydraulic fluid port P is connected to the 4th valve hole section.
The lower end of swivel nut 2 is plugged in the first valve hole section and the lower end surface of swivel nut 2 and second valve body are logical
The top bar face interval preset distance of hole section.Swivel nut 2 has swivel nut through-hole up and down, and the swivel nut through-hole wraps from top to bottom
The first swivel nut through hole section and the second swivel nut through hole section are included, the aperture of the first swivel nut through hole section is less than the second swivel nut through-hole
The aperture of section.
First adjusting rod 3 includes the upper pole part fitted in the first swivel nut through hole section and fits in second swivel nut
The lower bar portion of through hole section, the upper pole part is threadedly engaged with the first swivel nut through hole section and the upper end of the upper pole part is dashed forward upwards
For the upper surface of swivel nut 2, the lower bar portion is slidably matched with the second swivel nut through hole section.First adjusting rod 3 has up and down
The adjusting rod through-hole of perforation, the adjusting rod through-hole include top-down screw thread hole section and sliding hole section.
Second adjusting rod 13 is threadedly engaged with the screw thread hole section and the upper end of the second adjusting rod 13 is projected upwards in first
The upper surface of adjusting rod 3.
The cooperation of valve seat 6 is in the 5th valve hole section and the outer peripheral surface of the valve seat 6 is logical against the 5th valve body
The internal perisporium of hole section has valve seat central through hole and the first through flow hole 61 up and down, the valve seat central through hole on valve seat 6
Aperture be equal to the third valve hole section aperture.Advantageously, the first through flow hole 61 is around the valve seat central through hole
It is multiple, multiple first through flow holes 61 along valve seat 6 circumferential uniform intervals arrange.
The upper end of valve pocket 9 is plugged in the 5th valve hole section so that the upper surface of valve seat 6 is against the 4th valve
The leave from office terrace of body through hole section.Valve pocket 9 has valve pocket through-hole up and down, and the valve pocket through-hole includes the first valve from top to bottom
Cover through hole section, the second valve pocket through hole section and third valve pocket through hole section.The aperture of the first valve pocket through hole section is equal to the described 4th
Valve hole section, the aperture of the first valve pocket through hole section are greater than the aperture of the second valve pocket through hole section, second valve pocket
The aperture of through hole section is greater than the aperture of the third valve pocket through hole section.The under shed of the third valve pocket through hole section is configured to third
Hydraulic fluid port A.
Off-load spool 4 includes that can slide up and down to the glissile segment cooperated in the valve seat central through hole, be located at the cunning
The upper surface of dynamic section and with the undergauge section of the third valve hole section clearance fit and the upper surface of be located at described undergauge section and with
The extension diameter section of the second valve hole section clearance fit.Off-load spool 4 has the second through flow hole 41 up and down.
The internal perisporium clearance fit of the periphery wall of unloading spring 10 and the second valve hole section, unloading spring 10 it is upper
It holds against the lower end of the first adjusting rod 3 and the lower end of unloading spring 10 is against the upper end of off-load spool 4, unloading spring 10 is normal downwards
Push off-load spool 4 so that the extension diameter section lower end surface against the third valve hole section top bar to often closing institute
State the upper opening of third valve hole section.At this point, the lower end of the glissile segment extends downwardly valve seat 6 and protrudes into second valve pocket
In through hole section.Advantageously, the extension diameter section is configured to the round table-like extension diameter section that outer diameter is sequentially increased from bottom to top, described round table-like
The lower end of extension diameter section extends downwardly into the third valve hole section.
Overflow spool 5 is located in unloading spring 10 and positioned at the upper surface of off-load spool 4.
Overflow spring 11 is located in unloading spring 10, the upper end of overflow spring 11 against the second adjusting rod 13 lower end and overflow
The lower end of stray bullet spring 11 often pushes overflow spool 5 with the lower end of overflow valve core 5 downwards against overflow spool 5, overflow spring 11
The upper opening of the second through flow hole 41 is often closed against the upper surface of off-load spool 4 in face.Advantageously, overflow spool 5 is configured to
Vertex coniform overflow spool directed downwardly, the lower end of the coniform overflow spool extend downwardly into the second through flow hole 41.Advantageously,
The unloading valve further includes spring base 12, and spring base 12, which can slide up and down to, to be located in the sliding hole section and spring base 12
Between the lower end of the second adjusting rod 13 and the upper end of overflow spring 11.
Check valve sheet 7 can slide up and down to below valve seat 6 to be socketed on the glissile segment.The outer diameter of check valve sheet 7
Less than the aperture of the first valve pocket through hole section and the outer diameter of check valve sheet 7 is greater than the aperture of the second valve pocket through hole section.
The upper end of unidirectional spring 8 is socketed in the lower end of the glissile segment and against the lower end surface of check valve sheet 7, unidirectional spring
Against the terrace of appearing on the stage of the third valve pocket through hole section, unidirectional spring 8 is normal upwards to push check valve sheet 7 so that unidirectional for 8 lower end
Valve block 7 often closes the under shed of the first through flow hole 61.
Simply introduce a kind of unloading valve course of work according to an embodiment of the present invention with reference to the accompanying drawing.
As shown in figure 3, in use, the outlet of the second hydraulic fluid port P and low pressure and mass flow pump 15 is connected, third hydraulic fluid port A with
The outlet of high-pressure low-flow hydraulic pump 14 is connected, and the first hydraulic fluid port T is connected directly with fuel tank 16.
It can change the pretightning force of unloading spring 10 by adjusting the first adjusting rod 3, to set pressure unloading；Pass through tune
Saving the second adjusting rod 13 can change the pretightning force of overflow spring 10, to set oil pressure relief.
Work as electric motor starting, when driving the rotation of duplex hydraulic pump, the oil liquid that low pressure and mass flow hydraulic pump 15 exports is through the second oil
Mouthful P, the first through flow hole 61, which are applied to, to be overcome the active force of unidirectional spring 8 that nonreturn valve core 7 is pushed to move downward to beat in check valve sheet 7
The first through flow hole 61 is opened, the oil liquid into third hydraulic fluid port A, while 14 outlet of high-pressure low-flow pump also enters third hydraulic fluid port A, realizes
Fast feed, third hydraulic fluid port A pressure is lower at this time.When fast feed terminates, lathe, which touches workpiece, to be made in third hydraulic fluid port A pressure
When being raised to pressure unloading, the active force that the pressure oil of third hydraulic fluid port A pushes off-load spool 4 to overcome unloading spring 10 upwards opens institute
The upper opening for stating third valve hole section makes the oil liquid of the second hydraulic fluid port P flow into the by the upper opening of the third valve hole section
One hydraulic fluid port T carries out off-load, simultaneously as the pressure of third hydraulic fluid port A is greater than the pressure of the second hydraulic fluid port P, in unidirectional spring 8 and third
Under the action of hydraulic fluid port A oil pressure, check valve sheet 7, which moves upwards, closes the first through flow hole 61, and the second hydraulic fluid port P and third hydraulic fluid port A are truncated
It is obstructed；Duplex hydraulic pump enters work feed operating condition, only 14 fuel feeding of high-pressure low-flow hydraulic pump to third hydraulic fluid port A, third
The pressure of hydraulic fluid port A can achieve higher pressure, and the pressure of third hydraulic fluid port A makes off-load spool 4 be constantly in unlatching unloading condition.
In work feed operating condition, when the pressure of third hydraulic fluid port A is more than the pressure that overflow spring 11 is set, the oil liquid of third hydraulic fluid port A by
Second through flow hole 41 pushes overflow spool 5 to move upwards the upper opening for opening the second through flow hole 41, and the oil liquid of third hydraulic fluid port A is made to overflow
The first hydraulic fluid port T is flowed to, safeguard protection is played the role of.
The beneficial effects of the present invention are: it is designed by plug-in structure, by one-way function, unloading function, relief function
It is integrated together, volume compact, simple and reasonable, manufacturing cost is low.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more, unless separately
There is clearly specific restriction.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are within the scope of the invention to above-mentioned implementation
Example be changed, modify, replacement and variant, each fall within protection scope of the present invention.
Claims (5)
1. a kind of unloading valve characterized by comprising
Valve body, the valve body have valve hole up and down, and the valve hole includes the first valve hole from top to bottom
Section, the second valve hole section, third valve hole section, the 4th valve hole section and the 5th valve hole section, first valve body
The aperture of through hole section is greater than the aperture of the second valve hole section, and the aperture of the second valve hole section is greater than the third
The aperture of valve hole section, the aperture of the third valve hole section are less than the aperture of the 4th valve hole section, and described the
The aperture of four valve hole sections is less than the aperture of the 5th valve hole section, has the first hydraulic fluid port and the second oil on the valve body
Mouthful, first hydraulic fluid port is connected to the second valve hole section, and second hydraulic fluid port is connected to the 4th valve hole section；
Swivel nut, the lower end of the swivel nut is plugged in the first valve hole section and the lower end surface and described second of the swivel nut
The top bar face interval preset distance of valve hole section, the swivel nut have swivel nut through-hole up and down, the swivel nut through-hole
It from top to bottom include the first swivel nut through hole section and the second swivel nut through hole section, the aperture of the first swivel nut through hole section is less than described the
The aperture of two swivel nut through hole sections；
First adjusting rod, first adjusting rod include the upper pole part fitted in the first swivel nut through hole section and fit in institute
State the lower bar portion of the second swivel nut through hole section, the upper pole part and the first swivel nut through hole section are threadedly engaged and the upper pole part
Upper end is projected upwards in the upper surface of the swivel nut, and the lower bar portion is slidably matched with the second swivel nut through hole section, and described
One adjusting rod has adjusting rod through-hole up and down, and the adjusting rod through-hole includes top-down screw thread hole section and sliding eye
Section；
Second adjusting rod, second adjusting rod is threadedly engaged with the screw thread hole section and the upper end of second adjusting rod is upward
Protrude from the upper surface of first adjusting rod；
Valve seat, described valve seat cooperation is in the 5th valve hole section and the outer peripheral surface of the valve seat is against the 5th valve body
The internal perisporium of through hole section has valve seat central through hole and the first through flow hole up and down, the valve seat center on the valve seat
The aperture of through-hole is equal to the aperture of the third valve hole section；
Valve pocket, the upper end of the valve pocket is plugged in the 5th valve hole section so that the upper surface of the valve seat is against described
The leave from office terrace of 4th valve hole section, the valve pocket have valve pocket through-hole up and down, and the valve pocket through-hole is from top to bottom
Including the first valve pocket through hole section, the second valve pocket through hole section and third valve pocket through hole section, the aperture etc. of the first valve pocket through hole section
In the 4th valve hole section, the aperture of the first valve pocket through hole section is greater than the aperture of the second valve pocket through hole section, institute
The aperture for stating the second valve pocket through hole section is greater than the aperture of the third valve pocket through hole section, the under shed of the third valve pocket through hole section
It is configured to third hydraulic fluid port；
Off-load spool, the off-load spool include the glissile segment that can slide up and down to Pei He in the valve seat central through hole, position
In the upper surface of described glissile segment and with the undergauge section of the third valve hole section clearance fit and positioned at the undergauge section
Above and the extension diameter section with the second valve hole section clearance fit, the off-load spool are through-flow with second up and down
Hole；
Unloading spring, the internal perisporium clearance fit of the periphery wall of the unloading spring and the second valve hole section are described to unload
The upper end of lotus spring is against the lower end of first adjusting rod and the lower end of the unloading spring is against the upper of the off-load spool
End, the unloading spring often pushes the off-load spool downwards so that the lower end surface of the extension diameter section is logical against the third valve body
The top bar of hole section is to often close the upper opening of the third valve hole section, at this point, the lower end of the glissile segment is stretched downwards
It the valve seat and protrudes into the second valve pocket through hole section out；
Overflow spool, the overflow spool are located in the unloading spring and positioned at the upper surface of described off-load spool；
Overflow spring, the overflow spring are located in the unloading spring, and the upper end of the overflow spring is adjusted against described second
The lower end of the pole and lower end of the overflow spring is against the overflow spool, the overflow spring often pushes downwards the overflow
Second through flow hole is often closed against the upper surface of the off-load spool in the lower end surface of spool the above overflow spool
Upper opening；
Check valve sheet, the check valve sheet can slide up and down to below the valve seat to be socketed on the glissile segment, described
The outer diameter of check valve sheet is less than the aperture of the first valve pocket through hole section and the outer diameter of the check valve sheet is greater than second valve
Cover the aperture of through hole section；
Unidirectional spring, the upper end of the unidirectional spring are socketed in the lower end of the glissile segment and against the lower ends of the check valve sheet
Face, against the terrace of appearing on the stage of the third valve pocket through hole section, the unidirectional spring often pushes upwards for the lower end of the unidirectional spring
The check valve sheet is so that the check valve sheet often closes the under shed of first through flow hole.
2. unloading valve according to claim 1, which is characterized in that further include spring base, the spring base can slide up and down
Ground is located in the sliding hole section and the spring base is located at the lower end of second adjusting rod and the upper end of the overflow spring
Between.
3. unloading valve according to claim 1, which is characterized in that first through flow hole is logical around the valve seat center
Multiple, the circumferential uniform intervals arrangement of multiple first through flow holes along the valve seat in hole.
4. unloading valve according to claim 1, which is characterized in that the extension diameter section is configured to outer diameter and successively increases from bottom to top
Big round table-like extension diameter section, the lower end of the round table-like extension diameter section extend downwardly into the third valve hole section.
5. unloading valve according to claim 1, which is characterized in that it is directed downwardly coniform that the overflow spool is configured to vertex
The lower end of overflow spool, the coniform overflow spool extends downwardly into second through flow hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811134286.7A CN108953709B (en) | 2018-09-27 | 2018-09-27 | A kind of unloading valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811134286.7A CN108953709B (en) | 2018-09-27 | 2018-09-27 | A kind of unloading valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108953709A true CN108953709A (en) | 2018-12-07 |
| CN108953709B CN108953709B (en) | 2019-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811134286.7A Active CN108953709B (en) | 2018-09-27 | 2018-09-27 | A kind of unloading valve |
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| CN (1) | CN108953709B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110657267A (en) * | 2019-11-15 | 2020-01-07 | 黄洪刚 | Unloading valve with overflow function |
| CN111747218A (en) * | 2020-06-16 | 2020-10-09 | 武芳 | Controller for winding device of textile machine |
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| DE19919014A1 (en) * | 1999-04-27 | 2000-11-09 | Danfoss Fluid Power As | Hydraulic valve with locking and floating function has housing bore, in which switch channel optionally providable with pressure and with connecting channels on both sides is connectable by control valve with pressure source and tank |
| CN203584781U (en) * | 2013-12-16 | 2014-05-07 | 宁波赛维思机械有限公司 | Cartridge pilot relief valve with one-way valve |
| CN107917116A (en) * | 2016-10-08 | 2018-04-17 | 王换春 | A kind of fluid pressure type check valve |
| CN107939766A (en) * | 2017-12-28 | 2018-04-20 | 邵立坤 | A kind of oil supplementation buffer valve |
| CN108061069A (en) * | 2017-12-19 | 2018-05-22 | 宁波文泽机电技术开发有限公司 | Buffer overflow valve |
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2018
- 2018-09-27 CN CN201811134286.7A patent/CN108953709B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19919014A1 (en) * | 1999-04-27 | 2000-11-09 | Danfoss Fluid Power As | Hydraulic valve with locking and floating function has housing bore, in which switch channel optionally providable with pressure and with connecting channels on both sides is connectable by control valve with pressure source and tank |
| CN203584781U (en) * | 2013-12-16 | 2014-05-07 | 宁波赛维思机械有限公司 | Cartridge pilot relief valve with one-way valve |
| CN107917116A (en) * | 2016-10-08 | 2018-04-17 | 王换春 | A kind of fluid pressure type check valve |
| CN108061069A (en) * | 2017-12-19 | 2018-05-22 | 宁波文泽机电技术开发有限公司 | Buffer overflow valve |
| CN107939766A (en) * | 2017-12-28 | 2018-04-20 | 邵立坤 | A kind of oil supplementation buffer valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110657267A (en) * | 2019-11-15 | 2020-01-07 | 黄洪刚 | Unloading valve with overflow function |
| CN111747218A (en) * | 2020-06-16 | 2020-10-09 | 武芳 | Controller for winding device of textile machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108953709B (en) | 2019-08-23 |
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