CN108547818A - A kind of plug-in load-sensitive reversal valve - Google Patents
A kind of plug-in load-sensitive reversal valve Download PDFInfo
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- CN108547818A CN108547818A CN201810735576.0A CN201810735576A CN108547818A CN 108547818 A CN108547818 A CN 108547818A CN 201810735576 A CN201810735576 A CN 201810735576A CN 108547818 A CN108547818 A CN 108547818A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/025—Pressure reducing valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention discloses a kind of plug-in load-sensitive reversal valve, including grafting valve body, it is equipped with the perforative valve opening in left and right in the grafting valve body, spool is slidably connected in the valve opening；The left end of grafting valve body is equipped with swivel nut, and the perforative mounting hole in left and right is equipped in the swivel nut, the drive link being threadedly coupled with the left end of the spool is slidably connected in mounting hole；The left end of valve opening is equipped with the screw plug that gap is socketed on the drive link, and resetting spring is socketed on the outside of drive link in the mounting hole；The lateral surface of the swivel nut is equipped with the 5th annular groove, X hydraulic control hydraulic fluid ports is equipped in the 5th annular groove, the right end of the valve opening is Y hydraulic control hydraulic fluid ports；Third through flow hole, the 4th through flow hole, the 11st through flow hole are equipped in the spool, the right end of the third through flow hole is connected to the Y hydraulic controls hydraulic fluid port；The inserted valve is simple and reasonable, and manufacturing cost is low, convenient for Integrated design, can simplify hydraulic circuit.
Description
Technical field
The present invention relates to inserted valve technical field more particularly to a kind of plug-in load-sensitive reversal valves.
Background technology
More actuator load sensory systems are to be now widely used for vehicle, engineering machinery, agricultural machinery, mining industry machine
A kind of energy-saving hydraulic system in tool, forestry machinery, petroleum machinery equipment, mainly by load sensitive pump, load-sensitive multichannel
The compositions such as reversal valve, executing agency.Since system is in the case of only by single oil pump feed, can be changed by load-sensitive multichannel
Multiple executing agencies with different loads pressure are controlled simultaneously to valve, and can guarantee that speed does not change with load pressure, because
This can increase substantially the operating characteristics of vehicle and engineering machinery, avoid the phenomenon that low-load is too fast, high load stops.
Currently, the load-sensitive multiple directional control valve used in load sensitive system is generally three six logical forms, mostly cast
Part form chip multiple directional control valve either integral multi-way reversing valve, each reversal valve are eight slot structures, then
It is equipped with corresponding shuttle valve component, inner flow passage is sufficiently complex, causes that overall volume is huge, weight is big and of high cost；And with
The complexity of hydraulic circuit, existing multiple directional control valve is not suitable for carrying out the design of integration, in order to meet complicated hydraulic pressure
Multiple directional control valve and other function valve blocks will be attached by oil circuit by many hoses, are kept the pipeline of host complicated and held
Easily cause oil leak.
Invention content
(1) technical problems to be solved
It is an object of the invention to overcome the defect in the prior art, a kind of simple and reasonable, manufacturing cost is provided
It is low, convenient for Integrated design, the energy plug-in load-sensitive reversal valve of hydraulic circuit can be simplified.
(2) technical solution
To achieve the above object, the present invention provides the following technical solutions：
A kind of plug-in load-sensitive reversal valve, including grafting valve body, the grafting valve body is interior to be equipped with the perforative valve in left and right
Hole slidably connects spool in the valve opening；It is equipped with successively from left to right on the lateral surface of the grafting valve body first annular
Slot, the second annular groove, third annular groove, fourth annular slot, the first annular slot is interior to be equipped with the LS feedback oil being connected to valve opening
Mouthful, it is equipped with the B hydraulic fluid ports and the first through flow hole being connected to valve opening in the second annular groove, is equipped in third annular groove and is connected to valve opening
P hydraulic fluid ports, the A hydraulic fluid ports and the second through flow hole being connected to valve opening are equipped in fourth annular slot；The left end of the grafting valve body is installed
Have a swivel nut, mounting hole be connected to the valve opening equipped with right end in the swivel nut, slidably connected in the mounting hole with it is described
The drive link that the left end of spool is threadedly coupled；The left end of the valve opening is equipped with the screw plug that gap is socketed on the drive link,
It is socketed with resetting spring on the outside of drive link in the mounting hole, socket is equipped between the right end and screw plug of the resetting spring
The first spring base on drive link, and the right end of first spring base across screw plug stretch into valve opening for spool to
Pass through the first spring base compression reseting spring when left movement；It is equipped between the left end and plug of the resetting spring and is socketed in biography
Second spring seat in lever, the left end of the drive link are equipped with convex shoulder and are used to lead to when spool drives drive link to move right
Cross second spring seat compression reseting spring；The lateral surface of the swivel nut is equipped with the 5th annular groove, is set in the 5th annular groove
There are the X hydraulic control hydraulic fluid ports being connected to mounting hole, the right end of the valve opening is Y hydraulic control hydraulic fluid ports；
It is axially arranged with third through flow hole, the 4th through flow hole, the 11st through flow hole along it in the spool, the third is logical
The right end of discharge orifice is connected to the Y hydraulic controls hydraulic fluid port, and the side of the spool is equipped with the first convex shoulder, second convex successively from left to right
Shoulder, third convex shoulder, the 4th convex shoulder form left control chamber between first convex shoulder and the screw plug；The outside of the third convex shoulder
Face is equipped with first annular through-flow slot and the second annular flow slot, and the lateral surface of the 4th convex shoulder is logical equipped with third annular
Chute and the through-flow slot of fourth annular, interior the 5th be equipped with for being connected to the second annular flow slot and third through flow hole of the spool
Through flow hole, and the 6th through flow hole for being connected to the through-flow slot of fourth annular and third through flow hole；It is equipped with and is used in the spool
It is connected to the 8th through flow hole of the third annular flow slot and the 4th through flow hole, and described first annular for being connected to
9th through flow hole of through-flow slot and the 11st through flow hole；On the side of spool between the second convex shoulder and third convex shoulder shape
The for being connected to the 5th annular flow slot and the 11st through flow hole the 7th is equipped at the 5th annular flow slot, in the spool to lead to
Discharge orifice；The 6th annular flow slot is formed in the first convex shoulder and the second convex shoulder on the side of the spool, is equipped with and uses in the spool
In the tenth through flow hole for being connected to the 6th annular flow slot and the 4th through flow hole.
Through the above technical solutions, when X hydraulic controls hydraulic fluid port and Y hydraulic control hydraulic fluid ports are communicated with fuel tank when the inserted valve works, this
When spool it is in an intermediate position, the fluid of A hydraulic fluid ports and B hydraulic fluid ports has mouth to be connected to carry out off-load with Y hydraulic controls；When X hydraulic control hydraulic fluid ports return
When oily and Y hydraulic control hydraulic fluid ports are passed through pressure oil, spool overcomes resetting spring under the pressure effect of Y hydraulic control hydraulic fluid ports from centre position
Active force be moved to the left, the second annular flow slot is gradually turned off with the first through flow hole, and the through-flow slot of fourth annular and second logical
Discharge orifice is gradually turned off, and such spool just disconnects A hydraulic fluid ports, B hydraulic fluid ports and the connection of third through flow hole and stops off-load；Spool is by B simultaneously
Hydraulic fluid port is gradually opened, and the aperture of B hydraulic fluid ports is directly proportional to the control pressure size of Y hydraulic control hydraulic fluid ports, therefore can pass through hydraulic control ratio
Example controls the openings of sizes of B hydraulic fluid ports, to control the flow of B hydraulic fluid ports, when P hydraulic fluid ports communicate and second annular flow with B hydraulic fluid ports
When slot and the first through flow hole disconnect, the first through flow hole is connected to first annular through-flow slot and the 5th annular flow slot is fed back with LS
Hydraulic fluid port is connected, and the fluid of such B hydraulic fluid ports flows into LS feedback hydraulic fluid ports and carries out load pressure feedback；As Y hydraulic control hydraulic fluid port oil returns and X
When hydraulic control hydraulic fluid port is passed through pressure oil, pressure oil passes sequentially through the gap between mounting hole and screw plug and drive link and enters left control
Intracavitary pushes spool to be moved right from centre position, and resetting spring starts to compress under the action of drive link, the second annular flow
Slot is gradually turned off with the first through flow hole, and the through-flow slot of fourth annular is gradually turned off with the second through flow hole, and such spool just disconnects A
Hydraulic fluid port, B hydraulic fluid ports and the connection of third through flow hole stop off-load；A hydraulic fluid ports are gradually opened by spool simultaneously, the aperture and X of A hydraulic fluid ports
The control pressure size of hydraulic control hydraulic fluid port is directly proportional, therefore the openings of sizes of A hydraulic fluid ports can be controlled by hydraulic control ratio, to control
The flow of A hydraulic fluid ports processed, when P hydraulic fluid ports are communicated with A hydraulic fluid ports and the through-flow slot of fourth annular and the second through flow hole disconnect, second is through-flow
Hole is connected to third annular flow slot and the 6th annular flow slot is connected with LS feedback hydraulic fluid ports, and the fluid of such A hydraulic fluid ports flows into
LS feeds back hydraulic fluid port and carries out load pressure feedback；The inserted valve is simple and reasonable, and manufacturing cost is low, convenient for Integrated design, can
To simplify hydraulic circuit.
In further technical solution, when the spool is in an intermediate position, it is through-flow that the B hydraulic fluid ports pass sequentially through first
Hole, the second annular flow slot, the 5th through flow hole, third through flow hole are connected to Y hydraulic control hydraulic fluid ports, and the A hydraulic fluid ports pass sequentially through second
Through flow hole, fourth annular are through-flow slot, the 6th through flow hole, third through flow hole are connected to Y hydraulic control hydraulic fluid ports, and P hydraulic fluid ports and A hydraulic fluid ports and B
Hydraulic fluid port is not communicated with；When the spool is in left position, the P hydraulic fluid ports are connected to B hydraulic fluid ports, and it is logical that the B hydraulic fluid ports pass sequentially through first
Discharge orifice, first annular through-flow slot, the 9th through flow hole, the 11st through flow hole, the 7th through flow hole, the 5th annular flow slot and LS are anti-
Present hydraulic fluid port connection；When the spool is in right position, the P hydraulic fluid ports are connected to A hydraulic fluid ports, and it is through-flow that the A hydraulic fluid ports pass sequentially through second
Hole, third annular flow slot, the 8th through flow hole, the 4th through flow hole, the tenth through flow hole, the 6th annular flow slot and LS feedback oil
Mouth connection.
(3) advantageous effect
Compared with prior art, technical scheme of the present invention has the following advantages：
(1) it is designed for plug-in, it is volume compact, simple, rationally, load-sensitive pressure feedback may be implemented, without list
Only shuttle valve, and can be with off-load of the position to A hydraulic fluid ports, B hydraulic fluid ports in ratio control A hydraulic fluid ports, the output flow of B hydraulic fluid ports and progress.
(2) it can realize that remote control, use are very convenient by the proportional pressure-reducing valve of external connection.
(3) control P hydraulic fluid ports and A hydraulic fluid ports, the connection area of B hydraulic fluid ports are realized by hydraulic control, unlike multichannel in the prior art
Valve equally will also control the connection of A hydraulic fluid ports or B hydraulic fluid ports and T hydraulic fluid ports, therefore the oil circuit of the present invention is more succinct, facilitates and utilizes it
The inserted valve of its type carries out integrated form design, simplifies the oil circuit of integrated hydraulic system, to reduce integrated hydraulic system complex
Degree reduces hydraulic valve and the volume and weight of valve block.
Description of the drawings
Fig. 1 is the right view of the present invention；
Fig. 2 is the sectional view at the middle A-A of Fig. 1；
Fig. 3 is the sectional view at the middle B-B of Fig. 1；
Fig. 4 is the hydraulic schematic diagram of the present invention；
Hydraulic schematic diagram when Fig. 5 is present invention application.
Specific implementation mode
It please refers to Fig.1 shown in -5, a kind of plug-in load-sensitive reversal valve, including grafting valve body 9, the grafting valve body 9
It is interior to be equipped with the perforative valve opening 901 in left and right, slidably connect spool 8 in the valve opening 901；On the lateral surface of the grafting valve body 9
It is equipped with first annular slot 902, the second annular groove 903, third annular groove 904, fourth annular slot 905 successively from left to right, it is described
It is equipped with the LS feedback hydraulic fluid ports 906 being connected to valve opening 901 in first annular slot 902, is equipped with and valve opening 901 in the second annular groove 903
The B hydraulic fluid ports 92 of connection and the first through flow hole 9b, are equipped with the P hydraulic fluid ports 93 being connected to valve opening 901 in third annular groove 904, and the 4th
The A hydraulic fluid ports 91 and the second through flow hole 9c being connected to valve opening 901 are equipped in annular groove 905；The left end of the grafting valve body 9 is installed
There is swivel nut 1, is connected in mounting hole 1c, the mounting hole 1c and is slidably connected with the valve opening 901 equipped with right end in the swivel nut 1
There is the drive link 3 that the left end with the spool 8 is threadedly coupled；The left end of the valve opening 901 is equipped with gap and is socketed in the biography
Screw plug 7 in lever 3, the mounting hole 1c is interior to be socketed with resetting spring 4 in the outside of drive link 3, the resetting spring 4
The first spring base 6 being socketed on drive link 3 is equipped between right end and screw plug 7, and the right end of first spring base 6 passes through
The gap of screw plug 7 and drive link 3 is stretched into multiple for being compressed by the first spring base 6 when spool 8 is moved downward in valve opening 901
Position spring 4；The second spring seat 2 being socketed on drive link 3 is equipped between the left end and plug 11 of the resetting spring 4, it is described
The left end of drive link 3, which is equipped with convex shoulder and is used to compress by second spring seat 2 when spool 8 drives drive link 3 to move right, to be resetted
Spring 4；The lateral surface of the swivel nut 1 is equipped with the 5th annular groove 101, is equipped with and mounting hole 1c in the 5th annular groove 101
The right end of the X hydraulic controls hydraulic fluid port 102 of connection, the valve opening 901 is Y hydraulic controls hydraulic fluid port 94；
It is axially arranged with third through flow hole 8c, the 4th through flow hole 8k, the 11st through flow hole 8l along it in the spool 8, it is described
The right end of third through flow hole 8c is connected to the Y hydraulic controls hydraulic fluid port 94, and the side of the spool 8 is equipped with first successively from left to right
Convex shoulder 801, the second convex shoulder 802, third convex shoulder 803, the 4th convex shoulder 804, shape between first convex shoulder 801 and the screw plug 7
At left control chamber 9d；The lateral surface of the third convex shoulder 803 is equipped with 84 and second annular flow slot 83 of first annular through-flow slot,
The lateral surface of 4th convex shoulder 804 is equipped with third annular flow slot 86 and the through-flow slot 87 of fourth annular, in the spool 8
Equipped with the 5th through flow hole 8a for being connected to the second annular flow slot 83 and third through flow hole 8c, and for being connected to Fourth Ring
6th through flow hole 8b of shape is through-flow slot 87 and third through flow hole 8c；It is equipped in the spool 8 logical for being connected to the third annular
8th through flow hole 8h of chute 86 and the 4th through flow hole 8k, and for being connected to the first annular through-flow slot 84 and institute
State the 9th through flow hole 8j of the 11st through flow hole 8l；On the side of spool 8 between the second convex shoulder 802 and third convex shoulder 803 shape
It is equipped at the 5th annular flow slot 82, in the spool 8 for being connected to the 5th annular flow slot 82 and the 11st through flow hole 8l
7th through flow hole 8i；On the side of the spool 8 the 6th annular flow slot is formed in the first convex shoulder 801 and the second convex shoulder 802
88, interior the tenth through flow hole 8g being equipped with for being connected to the 6th annular flow slot 88 and the 4th through flow hole 8k of the spool 8.
When X hydraulic controls hydraulic fluid port 102 and Y hydraulic controls hydraulic fluid port 94 are all communicated with fuel tank, spool 8 is in an intermediate position.At this point, B is oily
The fluid of mouth 92 returns to Y hydraulic controls through the first through flow hole 9b, the second annular flow slot 83, the 5th through flow hole 8a, third through flow hole 8c
Hydraulic fluid port 94 carries out off-load；The fluid of A hydraulic fluid ports 91 is through the second through flow hole 9c, fourth annular is through-flow slot 87, the 6th through flow hole 8b,
Threeway discharge orifice 8c returns to Y hydraulic controls hydraulic fluid port 94 and carries out off-load；From the point of view of Fig. 5 application hydraulic schematic diagrams, when the present invention does not work
When, off-load can be carried out to A hydraulic fluid ports, B hydraulic fluid ports, to make the first balanced valve 17a, the second balanced valve 17b in hydraulic system
It can be reliably in cut-off state, meanwhile, P hydraulic fluid ports are all not communicated with A hydraulic fluid ports, B hydraulic fluid ports.
In the case that external hydraulic control makes 102 oil return of X hydraulic controls hydraulic fluid port and 94 oil inlet of Y hydraulic controls hydraulic fluid port, spool 8 is certainly intermediate
Position is moved to the left and the left end of spool 8 withstands the first spring base 6 so that the first spring base 6 moves downward compression and resets bullet
Spring 4, the second annular flow slot 83 are gradually turned off with the first through flow hole 9b, and the through-flow 87 and second through flow hole 9c of slot of fourth annular
It is gradually turned off, such spool 8 just disconnects A hydraulic fluid ports 91, the connection of B hydraulic fluid ports 92 and third through flow hole 8c stops off-load；Spool simultaneously
8 are gradually opened B hydraulic fluid ports 92, and the aperture of B hydraulic fluid ports 92 is directly proportional to the control pressure size of Y hydraulic controls hydraulic fluid port 94, therefore can be with
The openings of sizes that B hydraulic fluid ports 92 are controlled by hydraulic control ratio, to control the flow of B hydraulic fluid ports 92, when 92 phase of P hydraulic fluid ports 93 and B hydraulic fluid ports
When logical and the second annular flow slot 83 and the first through flow hole 9b are disconnected, the first through flow hole 9b is connected to first annular through-flow slot 84
And the 5th annular flow slot 82 and LS feedback hydraulic fluid port 906 be connected, the fluid of such B hydraulic fluid ports 92 passes sequentially through the first through flow hole
9b, first annular through-flow slot 84, the 9th through flow hole 8j, the 11st through flow hole 8l, the 7th through flow hole 8i, the 5th annular flow slot
82, which flow into LS feedback hydraulic fluid ports 906, carries out load pressure feedback, in conjunction with Fig. 5 it can be seen that the pressure of LS feedback hydraulic fluid ports 906 introduces
The load-sensitive chamber of load sensitive pump 15 controls it and adjusts output flow.
In the case that external hydraulic control makes 102 oil inlet of X hydraulic controls hydraulic fluid port and 94 oil return of Y hydraulic controls hydraulic fluid port, spool 8 is certainly intermediate
Position moves right and spool 8 drives drive link 3 to move right, and drive link 3 drives second spring by the convex shoulder of its left end
Seat 2 moves right compression reseting spring 4, and the second annular flow slot 83 is gradually turned off with the first through flow hole 9b, and fourth annular is logical
Chute 87 is gradually turned off with the second through flow hole 9c, and such spool 8 just disconnects A hydraulic fluid ports 91, B hydraulic fluid ports 92 and third through flow hole 8c
Connection stops off-load；A hydraulic fluid ports 91 are gradually opened by spool 8 simultaneously, the control pressure of the aperture and X hydraulic controls hydraulic fluid port 102 of A hydraulic fluid ports 91
Power size is directly proportional, therefore the openings of sizes of A hydraulic fluid ports 91 can be controlled by hydraulic control ratio, to control the stream of A hydraulic fluid ports 91
Amount, when P hydraulic fluid ports 93 are communicated with A hydraulic fluid ports 91 and the through-flow 87 and second through flow hole 9c of slot of fourth annular is disconnected, the second through flow hole 9c
It is connected with LS feedback hydraulic fluid ports 906 with the connection of third annular flow slot 86 and the 6th annular flow slot 88, such A hydraulic fluid ports 91
Fluid through the second through flow hole 9c, third annular flow slot 86, the 8th through flow hole 8h, the 4th through flow hole 8k, the tenth through flow hole 8g,
6th annular flow slot 88 flows into LS feedback hydraulic fluid ports 906 and carries out load pressure feedback, sees that LS feeds back the pressure of hydraulic fluid port 906 in conjunction with Fig. 5
The load-sensitive chamber that power introduces load sensitive pump 15 controls its adjusting output flow.
As shown in Figure 5, when 102 oil return of X hydraulic controls hydraulic fluid port, Y hydraulic control 94 oil inlets of hydraulic fluid port, the pressure by Y hydraulic controls hydraulic fluid port 94 is big
It is small can control P hydraulic fluid ports 93 and B hydraulic fluid ports 92 be connected to size, to control the flow of B hydraulic fluid ports 92, fluid is by hydraulic pump
15 outlet through P hydraulic fluid ports 93, B hydraulic fluid ports 92, the first check valve 16a, into hydraulic cylinder 18 rodless cavity push hydraulic cylinder 18 transport to the right
It is dynamic, while pressure the second balanced valve of control 17b of B hydraulic fluid ports 92 is opened, the fluid of 18 rod chamber of hydraulic cylinder is by the second balanced valve
17b oil return boxes, the pressure size of B hydraulic fluid ports 92 feed back to load sensitive pump through LS mouthfuls and automatically adjust.
As shown in Figure 5, when 102 oil inlet of X hydraulic controls hydraulic fluid port, Y hydraulic control 94 oil returns of hydraulic fluid port, by the pressure of X hydraulic controls hydraulic fluid port 102
What size can control P hydraulic fluid ports 93 and A hydraulic fluid ports 91 is connected to size, and to control the flow of A hydraulic fluid ports 91, fluid is by hydraulic pressure
Pump 15 outlet through P hydraulic fluid ports 93, A hydraulic fluid ports 91, the second check valve 16b, into hydraulic cylinder 18 rod chamber push hydraulic cylinder 18 to the left
Movement, while pressure the first balanced valve of control 17a of A hydraulic fluid ports 91 is opened, the fluid of 18 rodless cavity of hydraulic cylinder is by the first balanced valve
17a oil return boxes, the pressure size of A hydraulic fluid ports 91 feed back to load sensitive pump through LS mouthfuls and automatically adjust.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications can also be made, these are improved and profit
Decorations also should be regarded as protection scope of the present invention.
Claims (2)
1. a kind of plug-in load-sensitive reversal valve, which is characterized in that including grafting valve body, left and right is equipped in the grafting valve body
Perforative valve opening slidably connects spool in the valve opening；It is equipped with the on the lateral surface of the grafting valve body successively from left to right
One annular groove, the second annular groove, third annular groove, fourth annular slot, the first annular slot is interior to be equipped with the LS being connected to valve opening
Hydraulic fluid port is fed back, the B hydraulic fluid ports and the first through flow hole being connected to valve opening are equipped in the second annular groove, is equipped in third annular groove and valve opening
The P hydraulic fluid ports of connection, fourth annular slot is interior to be equipped with the A hydraulic fluid ports and the second through flow hole being connected to valve opening；The left end of the grafting valve body
Swivel nut is installed, the mounting hole being connected to the valve opening equipped with right end in the swivel nut, slidably connect in the mounting hole and
The drive link that the left end of the spool is threadedly coupled；The left end of the valve opening is equipped with the spiral shell that gap is socketed on the drive link
It is stifled, it is socketed with resetting spring on the outside of drive link in the mounting hole, set is equipped between the right end and screw plug of the resetting spring
The first spring base being connected on drive link, and the right end of first spring base across screw plug stretch into valve opening for spool to
Pass through the first spring base compression reseting spring when left movement；It is equipped between the left end and plug of the resetting spring and is socketed in transmission
Second spring seat on bar, the left end of the drive link are equipped with convex shoulder and are used for when spool drives drive link to move right by the
Two spring base compression reseting springs；The lateral surface of the swivel nut is equipped with the 5th annular groove, be equipped in the 5th annular groove with
The right end of the X hydraulic control hydraulic fluid ports of mounting hole connection, the valve opening is Y hydraulic control hydraulic fluid ports；
It is axially arranged with third through flow hole, the 4th through flow hole, the 11st through flow hole along it in the spool, the third through flow hole
Right end is connected to the Y hydraulic controls hydraulic fluid port, and the side of the spool is equipped with the first convex shoulder, the second convex shoulder, third successively from left to right
Convex shoulder, the 4th convex shoulder form left control chamber between first convex shoulder and the screw plug；The lateral surface of the third convex shoulder is equipped with
The lateral surface of first annular through-flow slot and the second annular flow slot, the 4th convex shoulder is equipped with third annular flow slot and the 4th
Annular flow slot, interior the 5th through flow hole being equipped with for being connected to the second annular flow slot and third through flow hole of the spool, and
The 6th through flow hole for being connected to the through-flow slot of fourth annular and third through flow hole；It is equipped in the spool for being connected to the third
8th through flow hole of annular flow slot and the 4th through flow hole, and for being connected to the first annular through-flow slot and described
9th through flow hole of 11 through flow holes；The 5th annular flow is formed on the side of spool between the second convex shoulder and third convex shoulder
Slot, interior the 7th through flow hole being equipped with for being connected to the 5th annular flow slot and the 11st through flow hole of the spool；The spool
The 6th annular flow slot is formed in the first convex shoulder and the second convex shoulder on side, is equipped in the spool logical for being connected to the 6th annular
Tenth through flow hole of chute and the 4th through flow hole.
2. plug-in load-sensitive reversal valve according to claim 1, which is characterized in that the spool is in an intermediate position
When, the B hydraulic fluid ports pass sequentially through the first through flow hole, the second annular flow slot, the 5th through flow hole, third through flow hole and Y hydraulic control oil
Mouth connection, the A hydraulic fluid ports pass sequentially through the through-flow slot of the second through flow hole, fourth annular, the 6th through flow hole, third through flow hole and Y liquid
Oil-control mouth is connected to, and P hydraulic fluid ports are not communicated with A hydraulic fluid ports and B hydraulic fluid ports；
When the spool is in left position, the P hydraulic fluid ports are connected to B hydraulic fluid ports, and the B hydraulic fluid ports pass sequentially through the first through flow hole, first
Annular flow slot, the 9th through flow hole, the 11st through flow hole, the 7th through flow hole, the 5th annular flow slot are connected to LS feedback hydraulic fluid ports；
When the spool is in right position, the P hydraulic fluid ports are connected to A hydraulic fluid ports, and the A hydraulic fluid ports pass sequentially through the second through flow hole, third
Annular flow slot, the 8th through flow hole, the 4th through flow hole, the tenth through flow hole, the 6th annular flow slot are connected to LS feedback hydraulic fluid ports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810735576.0A CN108547818A (en) | 2018-07-06 | 2018-07-06 | A kind of plug-in load-sensitive reversal valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810735576.0A CN108547818A (en) | 2018-07-06 | 2018-07-06 | A kind of plug-in load-sensitive reversal valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108547818A true CN108547818A (en) | 2018-09-18 |
Family
ID=63493453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810735576.0A Withdrawn CN108547818A (en) | 2018-07-06 | 2018-07-06 | A kind of plug-in load-sensitive reversal valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108547818A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285048A (en) * | 2019-07-19 | 2019-09-27 | 宁波克泰液压有限公司 | Screw thread inserting type speed sensitive load control valve |
-
2018
- 2018-07-06 CN CN201810735576.0A patent/CN108547818A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285048A (en) * | 2019-07-19 | 2019-09-27 | 宁波克泰液压有限公司 | Screw thread inserting type speed sensitive load control valve |
| CN110285048B (en) * | 2019-07-19 | 2024-03-19 | 宁波克泰液压有限公司 | Screw thread plug-in type speed sensitive load control valve |
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Application publication date: 20180918 |
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| WW01 | Invention patent application withdrawn after publication |