CN108757623A - Proportional throttle valve is led in a kind of stable type two - Google Patents
Proportional throttle valve is led in a kind of stable type two Download PDFInfo
- Publication number
- CN108757623A CN108757623A CN201810945015.3A CN201810945015A CN108757623A CN 108757623 A CN108757623 A CN 108757623A CN 201810945015 A CN201810945015 A CN 201810945015A CN 108757623 A CN108757623 A CN 108757623A
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- main valve
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- 239000012530 fluid Substances 0.000 claims abstract description 64
- 238000006073 displacement reaction Methods 0.000 claims abstract description 33
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 238000002955 isolation Methods 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 2
- 230000035939 shock Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 241001484259 Lacuna Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 230000009711 regulatory function Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- 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
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The present invention relates to valve technology fields, it discloses a kind of stable type two and leads to proportional throttle valve, including main valve seat, displacement sensor, pilot valve, main valve chamber is equipped in main valve seat, the upper end of main valve chamber is equipped with main valve lid, the side of main valve seat is equipped with A hydraulic fluid ports, B hydraulic fluid ports, valve pocket is equipped in main valve chamber, the side of main valve housing is equipped with lower through-hole, upper through-hole, the lateral surface of main valve lid is equipped with driving cylinder, hollow main valve plug is equipped in valve pocket, main valve plug is equipped with main piston, the center of valve pocket limit base is equipped with sealing hole, it is equipped with and the fixed brake piston of main valve plug in driving chamber, the side upper end of driving cylinder is equipped with upper oil hole, the side lower end of driving cylinder is equipped with lower oilhole, upper oil hole, lower oilhole is connect by pipeline with pilot valve respectively, the upper end of driving cylinder is equipped with sensor locating seat, displacement sensor is fixed on the inside of sensor locating seat.The present invention has the advantageous effect that stability is good, service life is long, easy to maintain.
Description
Technical field
The present invention relates to valve technology fields more particularly to a kind of stable type two to lead to proportional throttle valve.
Background technology
Two logical proportional throttle valves are widely used in the equipment such as die casting machine, forging press, ceramic press, proportional throttle valve
Basic functional principle：It is big by the pilot proportional servo valve and the displacement sensor formation closed-loop control on main valve plug of small dimension
The spool displacement amount of latus rectum proportional throttle valve, to realize that the opening degree of proportional throttle valve accurately controls, to realize through A oil
The flow proportional regulatory function of mouth, B hydraulic fluid ports.At present the displacement sensor in common two logical proportional throttle valves directly with A hydraulic fluid ports
It communicates, A hydraulic fluid ports are actuator port, are usually connect with pipeline or executing agency, and A oil ports have larger compression shock or negative
Pressure, compression shock or negative pressure are easy to cause displacement sensor and generate fatal damage, and usually this proportional throttle valve body
Product, weight are very big, and the quality of two logical proportional throttle valves of big specification is tens kilograms even more than 100 kilograms, replaces displacement
It needs to disassemble and install by various tools, lifting equipment when sensor, displacement sensor replacement difficulty is big, repairs
It is long, of high cost.
Invention content
The present invention is in order to solve the displacement sensor in two logical proportional throttle valves in the prior art by oil shock or negative
The problem of pressure condition is easily damaged provides a kind of stable type two and leads to proportional throttle valve, the position in two logical proportional throttle valve of this kind
Displacement sensor and A hydraulic fluid ports, B hydraulic fluid ports are completely isolated, will not be influenced under any circumstance by oil pressure, displacement sensor is not easy
Damage, overall stability are high.
To achieve the goals above, the present invention adopts the following technical scheme that：
Proportional throttle valve, including main valve seat, displacement sensor, pilot valve are led in a kind of stable type two, are set in the main valve seat
There are main valve chamber, the upper end of the main valve chamber to be equipped with main valve lid, the side of the main valve seat is equipped with the A hydraulic fluid ports, the B that are connected to main valve chamber
Hydraulic fluid port, the main valve chamber is interior to be equipped with cylindrical valve pocket, and the bottom of the main valve chamber is equipped with valve pocket limit base, the main valve lid
Medial surface be equipped with the position limiting convex ring that is clamped on the outside of valve pocket upper end, the side of valve pocket is equipped with the lower through-hole being connected to A hydraulic fluid ports, valve
The side of set is equipped with the upper through-hole being connected to B hydraulic fluid ports, and the lateral surface of the main valve lid is equipped with driving cylinder, is equipped in the driving cylinder
Cylindrical driving chamber, the driving chamber and valve pocket are coaxial, and the main valve is covered equipped with for being connected to driving chamber and main valve
The upper end of the lower connection through-hole of chamber, driving cylinder is equipped with upper connection through-hole；Hollow main valve plug, the main valve are equipped in the valve pocket
Be located at the position in valve pocket on core and be equipped with main piston, the center of the valve pocket limit base is equipped with sealing hole, the lower end of main valve plug with
The upper end of sealing hole clearance fit, main valve plug is stretched into across lower connection through-hole in driving chamber, is equipped in driving chamber solid with main valve plug
Fixed brake piston, the side upper end of the driving cylinder are equipped with the upper oil hole being connected to driving chamber, and the side lower end of driving cylinder is set
There are the lower oilhole being connected to driving chamber, upper oil hole, lower oilhole to be connect respectively with pilot valve by pipeline, the upper end of the driving cylinder
Equipped with sensor locating seat, the upper end of the main valve plug coordinates with upper connection via clearance, and the displacement sensor is fixed on
The inside of sensor locating seat, displacement sensor coaxially stretch into main valve plug.
Off-position or when without command signal, default conditions are A hydraulic fluid ports, B hydraulic fluid port closed states, i.e., main valve plug,
Main piston is in downward extreme position, and when needing A hydraulic fluid ports, the connection of B hydraulic fluid ports, lower oilhole oil inlet is controlled by pilot valve, from
And driving brake piston that main valve plug, main piston is driven integrally to move up a fragment position, specific displacement passes through displacement sensor
Signal is fed back to pilot valve by detection, to quantitatively control the opening size of A hydraulic fluid ports, B hydraulic fluid ports, similarly, is needed A hydraulic fluid ports, B oil
When mouth cut-out, pilot valve controls upper oil hole oil inlet, and brake piston drives main valve plug, main piston to move down, to cut off A oil
Fluid between mouth, B hydraulic fluid ports is linked up；During entire use, displacement sensor always by hollow main valve plug and main valve chamber,
A hydraulic fluid ports, B hydraulic fluid ports are completely isolated, will not be influenced by A hydraulic fluid ports, the oil shock of B oil ports or negative pressure, will not be by height
The medium influence of temperature, low temperature, the stability of displacement sensor is more preferable, is hardly damaged, to improve whole service life and steady
It is qualitative；Using independent housing configuration, it can individually process and assemble and be easy to be surface-treated, add to greatly reduce main valve chamber
Work precision reduces processing cost, reduces surface treatment cost.
Preferably, the upper side of the sensor locating seat is equipped with pressure release hydraulic fluid port.When main valve plug and sealing hole, upper company
When connecing through hole and leaking, the oil of leakage can be exhausted from pressure release oil port, to prevent displacement sensor from being made by oil pressure
With, and can also judge main valve plug and sealing hole, the sealing state of upper connection through hole according to the fluid of pressure release hydraulic fluid port.
Preferably, forming annular chamber between the valve pocket and main valve chamber, the inner wall of the main valve chamber is equipped with for A to be isolated
The isolation bulge loop of hydraulic fluid port, B hydraulic fluid ports is sealed between the inner wall and the outer wall of valve pocket of the isolation bulge loop by sealing ring；The valve
Upper through-hole, the lower through-hole of set side have several, upper through-hole along the circumferentially distributed of valve pocket, lower through-hole along valve pocket circumferential direction
Distribution.Upper through-hole, lower through-hole have several, can guarantee the big flow between A hydraulic fluid ports, B hydraulic fluid ports, and the pressure loss is small.
Preferably, being equipped with several oil-through-holes between two end faces of the main piston, it is located at the inner wall of the valve pocket
Position between upper through-hole and lower through-hole is equipped with conical sealing seat, and the lower end of the main piston is equipped with to be coordinated with conical sealing seat
Sealing cone is equipped with sealing ring between the upper side and valve pocket of the main piston.Upside cavity, the downside cavity of main piston are logical
Oil-through-hole communication is crossed, is subjected to displacement to prevent main piston unilateral side to be pressurized, moreover it is possible to upside cavity be avoided to generate vacuum, another party
Face can also mitigate the quality of main piston, and then improve the sensitivity of pilot valve control.
Preferably, being equipped with O-ring at the inner wall of the lower connection through-hole, upper connection through-hole, sealing hole.Various parts
Junction needs to be slidingly sealed, and setting O-ring plays sealing function.
Preferably, the pilot valve is proportional servo valve.
Therefore, the present invention has the advantages that：(1) displacement sensor and main valve chamber, A hydraulic fluid ports, B hydraulic fluid ports completely every
From, it will not be influenced by oil shock or negative pressure, will not be by cold and hot medium influence, stability is good, and service life is long, is not easy
Damage；(2) independent housing configuration is used, individually process and assemble and can be easy to be surface-treated, to greatly reduce main valve
Chamber machining accuracy reduces processing cost, reduces surface treatment cost.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of the present invention.
Status diagram when Fig. 2 is A hydraulic fluid ports, the connection of B hydraulic fluid ports.
Fig. 3 is close-up schematic view at C in Fig. 2.
In figure：Main valve seat 1, displacement sensor 2, pilot valve 3, main valve chamber 4, main valve lid 5, A hydraulic fluid ports 6, B hydraulic fluid ports 7, valve pocket 8,
Annular chamber 9, isolation bulge loop 10, lower through-hole 11, upper through-hole 12, valve pocket limit base 13, position limiting convex ring 14, driving cylinder 15, driving chamber
16, main valve plug 17, main piston 18, sealing hole 19, brake piston 20, upper oil hole 21, lower oilhole 22, sensor locating seat 23, let out
Press oil port 24, oil-through-hole 25, conical sealing seat 26, sealing cone 27.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and detailed description：
Proportional throttle valve, including main valve seat 1, displacement sensor 2, pilot valve 3 are led in a kind of stable type two as shown in Figure 1,
Pilot valve is proportional servo valve, and main valve chamber 4 is equipped in main valve seat, and the upper end of main valve chamber is equipped with main valve lid 5, and the side of main valve seat is set
There are the A hydraulic fluid ports 6 being connected to main valve chamber, B hydraulic fluid ports 7, cylindrical valve pocket 8, shape between valve pocket and main valve chamber are equipped in main valve chamber
Chamber 9 is circularized, the inner wall of main valve chamber is equipped with the isolation bulge loop 10 for A hydraulic fluid ports, B hydraulic fluid ports to be isolated, the inner wall of the isolation bulge loop
It is sealed by sealing ring between the outer wall of valve pocket, the side of valve pocket is equipped with the lower through-hole 11 being connected to A hydraulic fluid ports, the side of valve pocket
Equipped with the upper through-hole 12 being connected to B hydraulic fluid ports, upper through-hole, the lower through-hole of valve pocket side have several, and upper through-hole is along valve pocket
Circumferentially distributed, lower through-hole is along the circumferentially distributed of valve pocket.
The bottom of main valve chamber 4 is equipped with valve pocket limit base 13, and the medial surface of main valve lid 5 is equipped with and clamping on the outside of valve pocket upper end
Position limiting convex ring 14, the lateral surface of main valve lid are equipped with driving cylinder 15, are equipped with cylindrical driving chamber 16 in driving cylinder, driving chamber with
Valve pocket is coaxial, and main valve is covered equipped with the lower connection through-hole for being connected to driving chamber and main valve chamber, and the upper end of driving cylinder is equipped with upper company
Connect hole；It is equipped with hollow main valve plug 17 in valve pocket, the position in valve pocket is located on main valve plug and is equipped with main piston 18, valve pocket limit
The center of seat 13 is equipped with sealing hole 19, and the upper end of lower end and the sealing hole clearance fit of main valve plug, main valve plug passes through lower connection logical
Hole is stretched into driving chamber, is equipped in driving chamber and is equipped with and drive with the fixed brake piston 20 of main valve plug, the side upper end of driving cylinder
The upper oil hole 21 of dynamic chamber connection, the side lower end of driving cylinder are equipped with the lower oilhole 22 being connected to driving chamber, upper oil hole, lower oilhole point
It is not connect with pilot valve 3 by pipeline, the upper end of driving cylinder is equipped with sensor locating seat 23, and the upper end of main valve plug and upper connection are logical
Interporal lacuna coordinates, and displacement sensor 2 is fixed on the inside of sensor locating seat, and displacement sensor coaxially stretches into main valve plug；It passes
The upper side of sensor positioning seat is equipped with pressure release hydraulic fluid port 24.
As shown in figures 1 and 3, it is equipped with several oil-through-holes 25 between two end faces of main piston, is located at the inner wall of valve pocket 8
Position between upper through-hole and lower through-hole is equipped with conical sealing seat 26, and the lower end of main piston is close equipped with coordinating with conical sealing seat
The conical surface 27 is sealed, sealing ring is equipped between the upper side and valve pocket of main piston；Lower connection through-hole, upper connection through-hole, sealing hole
O-ring is equipped at inner wall.
In conjunction with attached drawing, the principle of the present invention is as follows：As shown in Figure 1, off-position or when without command signal, acquiescence
State is A hydraulic fluid ports, B hydraulic fluid port closed states, i.e. main valve plug, main piston is in downward extreme position, quilt between A hydraulic fluid ports, B hydraulic fluid ports
Partition；When needing A hydraulic fluid ports, the connection of B hydraulic fluid ports, lower oilhole oil inlet is controlled by pilot valve, to drive brake piston to drive master
Spool, main piston integrally move up a fragment position, and specific displacement is detected by displacement sensor feeds back to guide by signal
Valve, to quantitatively control the opening size of A hydraulic fluid ports, B hydraulic fluid ports, state is as shown in Figure 2 at this time；Similarly, it needs A hydraulic fluid ports, B hydraulic fluid ports
When cut-out, pilot valve controls upper oil hole oil inlet, and brake piston drives main valve plug, main piston to move down, to cut off A hydraulic fluid ports, B
Fluid between hydraulic fluid port is linked up；During entire use, displacement sensor passes through hollow main valve plug and main valve chamber, A oil always
Mouthful, B hydraulic fluid ports it is completely isolated, will not be influenced by A hydraulic fluid ports, the oil shock of B oil ports or negative pressure, will not by high temperature,
The stability of the medium influence of low temperature, displacement sensor is more preferable, is hardly damaged, to improve whole service life and stabilization
Property；Using independent housing configuration, can individually process and assemble and be easy to be surface-treated, to greatly reduce main valve chamber processing
Precision reduces processing cost, reduces surface treatment cost.
In the present embodiment, the signal between displacement sensor and pilot valve is transmitted, processing, is controlled, feedback is existing two
General technology in logical proportional throttle valve, belongs to the prior art, also the not claimed technology of the application, therefore the present embodiment
In no longer to the part, the prior art repeats.It these are only specific embodiments of the present invention, but the technical characteristic of the present invention
It is not limited thereto, it is any based on the present invention, for the technical problem for solving essentially identical, realize essentially identical technology effect
Fruit, made simple change, equivalent replacement or modification etc., is all covered by among protection scope of the present invention.
Claims (6)
1. proportional throttle valve, including main valve seat, displacement sensor, pilot valve are led in a kind of stable type two, it is equipped in the main valve seat
The upper end of main valve chamber, the main valve chamber is equipped with main valve lid, and the side of the main valve seat is equipped with the A hydraulic fluid ports being connected to main valve chamber, B oil
Mouthful, characterized in that cylindrical valve pocket is equipped in the main valve chamber, the bottom of the main valve chamber is equipped with valve pocket limit base, institute
State main valve lid medial surface be equipped with the position limiting convex ring that is clamped on the outside of valve pocket upper end, the side of valve pocket is equipped with to be connected to A hydraulic fluid ports
Lower through-hole, the side of valve pocket are equipped with the upper through-hole being connected to B hydraulic fluid ports, and the lateral surface of the main valve lid is equipped with driving cylinder, the drive
It is equipped with cylindrical driving chamber in dynamic cylinder, the driving chamber and valve pocket are coaxial, and the main valve is covered to be equipped with and be driven for being connected to
The upper end of the lower connection through-hole of dynamic chamber and main valve chamber, driving cylinder is equipped with upper connection through-hole；Hollow main valve is equipped in the valve pocket
Core is located at the position in valve pocket on the main valve plug and is equipped with main piston, and the center of the valve pocket limit base is equipped with sealing hole, main valve
The lower end of core and sealing hole clearance fit, the upper end of main valve plug is stretched into driving chamber across lower connection through-hole, is equipped in driving chamber
With the fixed brake piston of main valve plug, the side upper end of the driving cylinder is equipped with the upper oil hole being connected to driving chamber, driving cylinder
Side lower end is equipped with the lower oilhole being connected to driving chamber, and upper oil hole, lower oilhole are connect by pipeline with pilot valve respectively, the drive
The upper end of dynamic cylinder is equipped with sensor locating seat, and the upper end of the main valve plug coordinates with upper connection via clearance, and the displacement passes
Sensor is fixed on the inside of sensor locating seat, and displacement sensor coaxially stretches into main valve plug.
2. proportional throttle valve is led in a kind of stable type two according to claim 1, characterized in that the sensor locating seat
Upper side is equipped with pressure release hydraulic fluid port.
3. proportional throttle valve is led in a kind of stable type two according to claim 1, characterized in that the valve pocket and main valve chamber it
Between form annular chamber, the inner wall of the main valve chamber is equipped with the isolation bulge loop for A hydraulic fluid ports, B hydraulic fluid ports to be isolated, the isolation bulge loop
It is sealed by sealing ring between inner wall and the outer wall of valve pocket；Upper through-hole, the lower through-hole of the valve pocket side have several, upper logical
Hole is along the circumferentially distributed of valve pocket, and lower through-hole is along the circumferentially distributed of valve pocket.
4. proportional throttle valve is led in a kind of stable type two according to claim 1 or 3, characterized in that the two of the main piston
Several oil-through-holes are equipped between a end face, the position at the inner wall of the valve pocket positioned at upper through-hole and lower through-hole between is equipped with taper
Seal receptacle, the lower end of the main piston are equipped with sealing cone coordinate with conical sealing seat, the upper side of the main piston and
Sealing ring is equipped between valve pocket.
5. proportional throttle valve is led in a kind of stable type two according to claim 1, characterized in that the lower connection through-hole, on
Connection through-hole, sealing hole inner wall at be equipped with O-ring.
6. proportional throttle valve is led in a kind of stable type two according to claim 1, characterized in that the pilot valve is ratio
Servo valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810945015.3A CN108757623B (en) | 2018-08-20 | 2018-08-20 | Stable two-way proportional throttle valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810945015.3A CN108757623B (en) | 2018-08-20 | 2018-08-20 | Stable two-way proportional throttle valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108757623A true CN108757623A (en) | 2018-11-06 |
| CN108757623B CN108757623B (en) | 2024-05-10 |
Family
ID=63966339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810945015.3A Active CN108757623B (en) | 2018-08-20 | 2018-08-20 | Stable two-way proportional throttle valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108757623B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109595358A (en) * | 2018-12-27 | 2019-04-09 | 刘永 | A kind of safety-type threeway proportional throttle valve structure |
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2018
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108757623B (en) | 2024-05-10 |
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