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 pilot-operated type of manufacturing cost
Shut-off valve.
A kind of guide type valve according to an embodiment of the present invention, comprising:
Valve body, the valve body have the valve hole that Open Side Down, and the valve hole includes that aperture is successively from top to bottom
Widened valve body undergauge hole section, valve body hole section and valve body expanding hole section have on the side wall of the valve body and are connected to the valve
First hydraulic fluid port of the periphery wall of body and the valve body hole section;
Adjust bar, the adjustment bar include the head that can slide up and down to Pei He in the valve body hole section and with
The valve is stretched out in the body of rod that the valve body undergauge hole section is threadedly engaged and is connected with the head, the upper end of the body of rod upwards
Body;
Bushing, the bushing include upper cooperation section in the lower end for fit in the valve body hole section, fit in it is described
The outer diameter of the main paragraph of the expanding hole section of valve body and the lower cooperation section below the main paragraph, the lower cooperation section is less than institute
The outer diameter of cooperation section is stated, there is bushing through-hole up and down on the bushing, the bushing through-hole includes hole from top to bottom
The liner body hole section and bushing undergauge hole section that diameter successively reduces;
Valve casing, the upper end secure fit of the valve casing have up and down on the valve casing in the expanding hole section of valve body
Valve casing through-hole, the valve casing through-hole include the first valve casing through hole section, the second valve casing through hole section, third valve casing through-hole from top to bottom
Section, the 4th valve casing through hole section and the 5th valve casing through hole section, the aperture of the first valve casing through hole section are equal to the lower of the bushing and match
The outer diameter of section is closed, the aperture of the second valve casing through hole section is less than the aperture of the first valve casing through hole section, the third valve casing
The aperture of through hole section is less than the aperture of the second valve casing through hole section, and the aperture of the 4th valve casing through hole section is between described second
Between the aperture of valve casing through hole section and the aperture of the third valve casing through hole section, the aperture of the 5th valve casing through hole section is equal to institute
State the aperture of the second valve casing through hole section, the lower cooperation section of the bushing fit in the upper end of the first valve casing through hole section so that
The upper surface of the valve casing against the main paragraph of the bushing lower end surface and make the bushing main paragraph upper surface against
The leave from office terrace of the valve body hole section has the periphery wall and described second for being connected to the valve casing on the side wall of the valve casing
Second hydraulic fluid port of valve casing through hole section, the connection valve casing periphery wall and the third hydraulic fluid port of the third valve casing through hole section, be connected to
4th hydraulic fluid port of the periphery wall of the valve casing and the 5th valve casing through hole section has on the valve casing and is connected to first valve casing
The runner of through hole section and the 5th valve casing through hole section;
Connector, the connector include described in the connector upper section fitted in the first valve casing through hole section and adaptation
Connector lower section in second valve casing through hole section, the lower end surface of the connector upper section is against the upper of the second valve casing through hole section
Step surface, the lower end surface of the connector lower section are located at the upper surface of the inner opening of second hydraulic fluid port, have on the connector
The connector blind hole of opening upwards, the connector blind hole include connector blind hole main paragraph and the contracting of connector blind hole from top to bottom
Diameter section has the first of the lower end of the lower end surface and the connector blind hole undergauge section that are connected to the connector on the connector
Damping hole;
Guide's valve pocket, guide's valve pocket include first segment, second segment, third section, the 4th section and the 5th section from bottom to top,
The first segment fits in the connector blind hole main paragraph, and the outer diameter of the second segment is greater than the connector blind hole main body
The aperture of section and the aperture for being less than the first valve casing through hole section, the lower end surface of the second segment is against the upper end of the connector
Face, the third section fits in the first valve casing through hole section and the upper surface of the third section is against the lower end of the bushing
Face, described 4th section fits in the bushing undergauge hole section and the 4th section of the axial length is equal to bushing undergauge hole
The axial length of section, described 5th section is located in the liner body hole section, and the 5th section of the outer diameter is not more than the described 4th
The outer diameter and the 5th section of the upper surface of section are concordant with the upper surface of the bushing, and the pilot valve, which is put on, to be had up and down
Guide's valve pocket through-hole, the aperture of guide's valve pocket through-hole is equal to the aperture of the connector blind hole undergauge section and the guide
Valve pocket through-hole and the connector blind hole undergauge section are coaxial, have on the second segment be connected to the periphery wall of guide's valve pocket with
First through flow hole of guide's valve pocket through-hole, described 5th section upper with the periphery wall for being connected to guide's valve pocket and the elder generation
Second through flow hole of guide valve bushing through-hole, the valve casing, the connector define the first control between guide's valve pocket three
Chamber, the upper opening of the runner are connected to first control chamber;
Pilot valve, the pilot valve, which can slide up and down to, is located at guide's valve pocket through-hole and the connector blind hole
In undergauge section, when the lower end of the pilot valve is against the bottom surface of the connector blind hole undergauge section, the pilot valve
Upper surface is not less than the upper surface of guide's valve pocket, has the through-flow blind hole that Open Side Down in the pilot valve, along described
The radial direction of pilot valve penetrates through the pilot valve and up and down spaced apart first radial through-flow hole and the second radial through-flow hole,
First radial through-flow hole is with second radial through-flow hole between the upper and lower away from equal to first through flow hole and described second
Through flow hole between the upper and lower away from the lower end closed of the through-flow blind hole;
First spring, first spring are located in the valve body hole section, and the upper end of first spring is against institute
The lower end of head and first spring is stated against the upper end of the pilot valve, first spring is for often pushing downwards institute
Pilot valve is stated so that the lower end of the pilot valve is against the bottom surface of the connector blind hole undergauge section, at this point, described first
Radial through-flow hole is between first through flow hole and second through flow hole and second radial through-flow hole is positioned at described
Under first through flow hole;
Nonreturn valve core, the nonreturn valve core can slide up and down to cooperation in the second valve casing through hole section and be located at described
Under connector, the nonreturn valve core includes nonreturn valve core main paragraph and nonreturn valve core undergauge section, the check valve from top to bottom
The outer diameter of core undergauge section is described between the aperture of the second valve casing through hole section and the aperture of the third valve casing through hole section
There is the list of the periphery wall of the upper surface and the nonreturn valve core undergauge section that are connected to the nonreturn valve core main paragraph on nonreturn valve core
To spool through flow hole;
Second spring, the second spring are located in the second valve casing through hole section, the upper end of the second spring against
The lower end of the connector and lower end of the second spring is against the upper end of the nonreturn valve core, the second spring is normal downwards
Push the nonreturn valve core so that third valve casing through hole section described in the lower end face closure of the nonreturn valve core undergauge section upper opening;
Screw plug, the screw plug are located on the valve casing for closing the under shed of the 5th valve casing through hole section;
Off-load spool, the off-load spool, which can slide up and down to, to be located in the 5th valve casing through hole section and is located at the spiral shell
It the upper surface of blocks up, there is the of the lower end surface of the upper surface and the off-load spool that are connected to the off-load spool on the off-load spool
Two damping holes, define the second control chamber between the off-load spool and the screw plug, the under shed of the runner and described the
The connection of two control chambers;
Third spring, the third spring are located in the 5th valve casing through hole section, the upper end of the third spring against
The lower end of the off-load spool and the third spring often pushes the unloading valve against the screw plug, the third spring upwards
Core so that the 4th valve casing through hole section described in the upper end face closure of the off-load spool under shed.
Advantageously, the guide type valve further includes lower spring cup and upper spring seat, and the lower spring cup is located at institute
It states between the upper end of pilot valve and the lower end of first spring, the upper spring seat is located at lower end and the institute of the adjustment bar
Between the upper end for stating the first spring.
Advantageously, the guide type valve further includes sealing shroud, and the sealing is set on the valve body, the bar
The upper end of body is upward through the sealing shroud.
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.
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 guide type valve according to an embodiment of the present invention.
As shown in Figure 1 to Figure 3, a kind of guide type valve according to an embodiment of the present invention, comprising: valve body 1 adjusts bar
10, bushing 3, valve casing 2, connector 6, guide's valve pocket 7, pilot valve 8, the first spring 9a, nonreturn valve core 5, second spring 9b, spiral shell
Stifled 11, off-load spool 4, third spring 9c.
Specifically, valve body 1 has the valve hole that Open Side Down, valve hole successively expands including aperture from top to bottom
Valve body undergauge hole section, valve body hole section and the expanding hole section of valve body, there is on the side wall of valve body 1 periphery wall of connection valve body 1
With the first hydraulic fluid port T2 of the valve body hole section.
Adjustment bar 10 include can slide up and down to cooperate head in the valve body hole section and with the valve body
Valve body 1 is stretched out in the body of rod that undergauge hole section is threadedly engaged and is connected with the head, the upper end of the body of rod upwards.Advantageously, institute
The guide type valve stated further includes sealing shroud 100, and sealing shroud 100 is located on valve body 1, and the upper end of the body of rod is upward through close
Big envelope 100.Thus, it is possible to guarantee leakproofness.
Bushing 3 includes the upper cooperation section fitted in the lower end of the valve body hole section, to fit in the valve body expanding
The outer diameter of the main paragraph of hole section and the lower cooperation section below the main paragraph, the lower cooperation section is less than the upper cooperation
The outer diameter of section, has bushing through-hole up and down on bushing 3, the bushing through-hole include from top to bottom aperture successively reduce
Liner body hole section and bushing undergauge hole section.
The upper end secure fit of valve casing 2 has valve casing through-hole up and down, institute in the expanding hole section of valve body, on valve casing 2
It is logical to state valve casing through-hole from top to bottom and include the first valve casing through hole section, the second valve casing through hole section, third valve casing through hole section, the 4th valve casing
Hole section and the 5th valve casing through hole section, the aperture of the first valve casing through hole section are equal to the outer diameter of the lower cooperation section of bushing 3, and described the
The aperture of two valve casing through hole sections is less than the aperture of the first valve casing through hole section, and the aperture of the third valve casing through hole section is less than institute
State the aperture of the second valve casing through hole section, the aperture of the 4th valve casing through hole section between the second valve casing through hole section aperture with
Between the aperture of the third valve casing through hole section, the aperture of the 5th valve casing through hole section is equal to the second valve casing through hole section
Aperture, the lower cooperation section of bushing 3 fits in the upper end of the first valve casing through hole section so that the upper surface of valve casing 2 is against bushing
The lower end surface of 3 main paragraph and make bushing 3 main paragraph leave from office terrace of the upper surface against the valve body hole section, valve casing
Have the periphery wall of connection valve casing 2 with the second hydraulic fluid port A of the second valve casing through hole section on 2 side wall, be connected to the periphery of valve casing 2
The 4th of wall and the third hydraulic fluid port P of the third valve casing through hole section, the periphery wall for being connected to valve casing 2 and the 5th valve casing through hole section
Hydraulic fluid port T1 has the runner 21 for being connected to the first valve casing through hole section and the 5th valve casing through hole section on valve casing 3.
Connector 6 includes that the connector upper section fitted in the first valve casing through hole section and adaptation second valve casing are logical
Connector lower section in hole section, appear on the stage terrace of the lower end surface of the connector upper section against the second valve casing through hole section, institute
The lower end surface for stating connector lower section is located at the upper surface of the inner opening of the second hydraulic fluid port A, the connector with opening upwards on connector 6
Blind hole, the connector blind hole include connector blind hole main paragraph and connector blind hole undergauge section from top to bottom, are had on connector 6
There is the first damping hole 61 of the lower end surface of connection connector 6 and the lower end of the connector blind hole undergauge section.
Guide's valve pocket 7 includes first segment, second segment, third section, the 4th section and the 5th section from bottom to top, and the first segment is suitable
It fits in the connector blind hole main paragraph, the outer diameter of the second segment is greater than the aperture of the connector blind hole main paragraph and small
In the aperture of the first valve casing through hole section, the lower end surface of the second segment is connected the upper surface of body 6, the third Duan Shi
It fits in the first valve casing through hole section and the upper surface of the third section is against the lower end surface of bushing 3, the 4th section of adaptation
In the bushing undergauge hole section and the 4th section of the axial length is equal to the axial length of the bushing undergauge hole section, described
5th section is located in the liner body hole section, and the 5th section of the outer diameter is not more than the 4th section of the outer diameter and the described 5th
The upper surface of section is concordant with the upper surface of bushing 3, has guide's valve pocket through-hole up and down, the guide on guide's valve pocket 7
The aperture of valve pocket through-hole is equal to the aperture of the connector blind hole undergauge section and guide's valve pocket through-hole and the connector are blind
Hole undergauge section is coaxial, and there is the periphery wall of connection guide's valve pocket 7 and the first of guide's valve pocket through-hole to lead on the second segment
Discharge orifice 72, the second through flow hole 71 of the described 5th section upper periphery wall with connection guide's valve pocket 7 and guide's valve pocket through-hole,
Valve casing 2, connector 6 define the first control chamber 2b, the upper opening of runner 21 and the first control chamber between 7 three of guide's valve pocket
2b connection.
Pilot valve 8, which can slide up and down to, to be located in guide's valve pocket through-hole and the connector blind hole undergauge section, when
When the lower end of pilot valve 8 is against the bottom surface of the connector blind hole undergauge section, the upper surface of pilot valve 8 is not less than pilot valve
7 upper surface is covered, there is the through-flow blind hole 81, the radial perforation pilot valve along pilot valve 8 that Open Side Down in pilot valve 8
8 and spaced apart first radial through-flow hole 83 and the second radial through-flow hole 82, the first radial through-flow hole 83 and the second diameter up and down
To through flow hole 82 between the upper and lower away from be equal to the first through flow hole 72 and the second through flow hole 71 between the upper and lower away from.The lower end of through-flow blind hole 81
Closing.
First spring 9a is located in the valve body hole section, and the upper end of the first spring 9a is against the head and the first bullet
The lower end of spring 9a is against the upper end of pilot valve 8, and the first spring 9a for often pushing pilot valve 8 so that pilot valve 8 downwards
Lower end against the bottom surface of the connector blind hole undergauge section, at this point, the first radial through-flow hole 83 between the first through flow hole 72 with
Between second through flow hole 71 and the second radial through-flow hole 82 is located under the first through flow hole 72.Advantageously, the pilot-operated type is cut
Only valve further includes lower spring cup 12 and upper spring seat 13, and lower spring cup 12 is located at the upper end of pilot valve 8 with the first spring 9a's
Between lower end, upper spring seat 13 is located between the lower end of adjustment bar 10 and the upper end of the first spring 9a.
Nonreturn valve core 5 can slide up and down to cooperation in the second valve casing through hole section and be located under connector 6, unidirectionally
Spool 5 includes nonreturn valve core main paragraph and nonreturn valve core undergauge section from top to bottom, the outer diameter of the nonreturn valve core undergauge section between
There is connection institute between the aperture of the second valve casing through hole section and the aperture of the third valve casing through hole section, on nonreturn valve core 5
State the nonreturn valve core through flow hole 51 of the upper surface of nonreturn valve core main paragraph and the periphery wall of the nonreturn valve core undergauge section.
Second spring 9b is located in the second valve casing through hole section, and the upper end of second spring 9b is connected the lower end of body 6
And the lower end of second spring 9b, against the upper end of nonreturn valve core 5, second spring 9b often pushes nonreturn valve core 5 so that the list downwards
The upper opening of third valve casing through hole section described in lower end face closure to spool undergauge section.
Screw plug 11 is located on valve casing 2 for closing the under shed of the 5th valve casing through hole section.
Off-load spool 4, which can slide up and down to, the upper surface of to be located in the 5th valve casing through hole section and is located at screw plug 11, off-load
There is the second damping hole 41 of the upper surface and the lower end surface for stating off-load spool 4 of connection off-load spool 4, off-load spool 4 on spool 4
The second control chamber 2a is defined between screw plug 11, the under shed of runner 21 is connected to the second control chamber 2a.
Third spring 9c is located in the 5th valve casing through hole section, and the upper end of third spring 9c is against off-load spool 4 and
The lower end of three spring 9c often pushes off-load spool 4 so that the upper surface of off-load spool 4 is sealed upwards against screw plug 11, third spring 9c
Close the under shed of the 4th valve casing through hole section.
Below with reference to the accompanying drawings a kind of working principle of guide type valve according to an embodiment of the present invention is sketched.
As shown in figure 3, third hydraulic fluid port P is connected with the outlet of hydraulic pump 14, the import phase of the second hydraulic fluid port A and accumulator 16
Even, the 4th hydraulic fluid port T1, the first hydraulic fluid port T2 and fuel tank 15 are connected directly.
It can change the preload of the first spring 9a by adjusting adjustment bar 10 (rotating clockwise or counterclockwise adjusting rod)
Power, to set the cracking pressure of pilot valve 8.
Work as electric motor starting, when hydraulic pump 14 being driven to rotate, the oil liquid that hydraulic pump 14 exports is applied to unidirectionally through third hydraulic fluid port P
On spool 5, overcomes the active force of second spring 9b that nonreturn valve core 5 is pushed to move upwards and open the upper of the third valve casing through hole section
Opening enters the second hydraulic fluid port A through nonreturn valve core through flow hole 51, carries out fliud flushing, while the oil liquid warp of third hydraulic fluid port P to accumulator 16
Second damping hole 41 enters the second control chamber 2a, because pilot valve 8 is in close state, the oil liquid of the second control chamber 2a is without stream
Dynamic, the pressure of the second control chamber 2a and third hydraulic fluid port P are equal, and under the active force of third spring 9c, off-load spool 4, which is in, is closed
State, third hydraulic fluid port P and the 4th hydraulic fluid port T1 cut-off are obstructed.
When the pressure in accumulator 16 reach setting pressure when (namely the pressure of the second hydraulic fluid port A reach setting pressure when),
The pressure oil of second hydraulic fluid port A is applied in pilot valve 8 through the first damping hole 61, and pilot valve 8 is pushed to overcome the first spring 9a
Active force move upwards, so that the second radial through-flow hole 82 is connected with the first through flow hole 72, the first radial through-flow hole 83 and
Two through flow holes 71 are connected, and the oil liquid of such second control chamber 2a is successively through runner 21, the first through flow hole 72, the second radial through-flow
The first hydraulic fluid port T2 is flowed to after hole 82, through-flow blind hole 81, the first radial through-flow hole 83, the second through flow hole 71, due to the second damping hole
41 effect, making to produce pressure difference between third hydraulic fluid port P and the second control chamber 2a, (i.e. the pressure of third hydraulic fluid port P is greater than the second control
The pressure of chamber 2a processed), this pressure difference pushes off-load spool 4 that the active force of third spring 9c is overcome to move downward and opens the 4th valve
The under shed of shell through hole section, so that third hydraulic fluid port P is connected to the 4th hydraulic fluid port T1, the oil liquid of third hydraulic fluid port P flows into the 4th hydraulic fluid port T1
Off-load is carried out, makes hydraulic pump 14 compared with being operated under low consumpting power, simultaneously as between the second hydraulic fluid port A and third hydraulic fluid port P
Pressure difference the pressure of third hydraulic fluid port P (i.e. the second hydraulic fluid port A pressure be greater than) is generated, in the oil pressure of second spring 9b and the second hydraulic fluid port A
Under effect, nonreturn valve core 5 moves downward the upper opening for closing the third valve casing through hole section, and third hydraulic fluid port P and the second hydraulic fluid port A are cut
Break obstructed, accumulator 16 enters state of pressure keeping.
When pressure of the pressure of the second hydraulic fluid port A lower than the first spring 9a setting, pilot valve 8 moves downward partition second
The connection of control chamber 2a and the first hydraulic fluid port T2, are re-closing off off-load spool 4, and the oil liquid of third hydraulic fluid port P is flowed into through nonreturn valve core 5
Second hydraulic fluid port A carries out ftercompction.
The beneficial effect of guide type valve according to an embodiment of the present invention is, is designed by plug-in structure, will be single
It is integrated together to function, unloading function, 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.