CN114185368B - High-precision flow proportional control valve - Google Patents
High-precision flow proportional control valve Download PDFInfo
- Publication number
- CN114185368B CN114185368B CN202111458410.7A CN202111458410A CN114185368B CN 114185368 B CN114185368 B CN 114185368B CN 202111458410 A CN202111458410 A CN 202111458410A CN 114185368 B CN114185368 B CN 114185368B
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- 239000007788 liquid Substances 0.000 claims abstract description 7
- 230000001105 regulatory effect Effects 0.000 claims description 42
- 230000002457 bidirectional effect Effects 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 9
- 230000008859 change Effects 0.000 abstract description 7
- 230000035945 sensitivity Effects 0.000 abstract description 7
- 230000033228 biological regulation Effects 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract description 2
- 230000008676 import Effects 0.000 abstract 1
- 238000005299 abrasion Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000009123 feedback regulation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
Abstract
The invention discloses a high-precision flow proportional control valve which is suitable for occasions with high-precision control requirements on flow proportions when two storage tanks or storage tanks discharge liquid or exhaust gas simultaneously. The medium carries out pressure regulation and current limiting through the throttle ring of valve casing both ends import, and when the medium that flows into the valve in both ends influenced by external pressure fluctuation causes flow proportion to appear changing, the automatic feedback adjustment mechanism that takes valve casing inner piston subassembly, adjusting lever, two-way regulation case, spring as the main part can resume the regulation to the change of flow state to reach the purpose of accurate control flow size and proportion when outwards discharging the medium, have sensitivity adjustable, suitability and maintainability stronger characteristics.
Description
Technical Field
The invention relates to a high-precision flow proportional control valve which is mainly used for discharging and mixing control of gas or liquid in the fields of aerospace, chemical industry and the like according to a certain flow proportion.
Background
In the aerospace field, the control of the mass center and the working state of the aircraft in the working process has higher requirements. When an aircraft has a plurality of tanks or storage tanks, the working state of the aircraft is easily influenced by centroid change caused by working medium consumption or fluctuation of the mixing proportion of the working medium. The influence of the fluctuation of the flow proportion of the working medium caused by the change of the working state or the fluctuation of the external pressure is eliminated, the controllability of the working state of the aircraft can be further improved, and the potential safety hazard possibly caused by the change of the mass center and the working state is eliminated.
Disclosure of Invention
The invention aims to design a high-precision flow proportional control valve with an automatic feedback regulation structure, which can perform high-precision flow proportional control on a working medium entering the valve, and further, the high-precision flow proportional control valve is applied to an aircraft, so that the controllability of the working state of the aircraft is improved.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
A high-precision flow proportional control valve comprises,
The valve housing is provided with a first inlet, a second inlet and an outlet, a first cavity, a second cavity, a third cavity, a fourth cavity and a fifth cavity are arranged in the valve housing,
One end of the first chamber is communicated with the first inlet;
one end of the second chamber is communicated with the second inlet;
the third chamber is respectively communicated with the fourth chamber, the fifth chamber and the outlet;
the fourth chamber is connected with the first chamber, and the fifth chamber is communicated with the second chamber;
The two-way regulating valve core is positioned in the third cavity, the left end and the right end of the two-way regulating valve core respectively extend into the fourth cavity and the fifth cavity, two valve core conical surfaces are arranged on the surface of the two-way regulating valve core, and the two valve core conical surfaces respectively form two throttling channels with the inner wall of the fourth cavity and the inner wall of the fifth cavity;
The adjusting screw comprises a first adjusting screw and a second adjusting screw, the first adjusting screw is in threaded connection with one end of the fourth chamber, the first adjusting screw is connected with one end of the bidirectional adjusting valve core, the second adjusting screw is in threaded connection with one end of the fifth chamber, and the second adjusting screw is connected with the other end of the bidirectional adjusting valve core;
The spring comprises a first spring and a second spring, the first spring is positioned in the fourth cavity and sleeved on the bidirectional regulating valve core, the second spring is positioned in the fifth cavity and sleeved on the bidirectional regulating valve core, the first spring is positioned between the first regulating screw and the valve core conical surface, and the second spring is positioned between the second regulating screw and the other valve core conical surface;
The piston assembly spans the first chamber, the second chamber and the third chamber and comprises a first piston and a second piston, the first piston is in sliding connection with the inner wall of the first chamber, and the second piston is in sliding connection with the inner wall of the second chamber;
and two ends of the adjusting lever are respectively connected with the two-way adjusting valve core and the piston assembly in a rotating way.
Alternatively, the high-precision flow proportional control valve further comprises a throttle ring, and the two throttle rings are detachably connected in the first chamber and the second chamber respectively.
As an option, the high-precision flow proportional control valve further comprises valve core guide sleeves, the valve core guide sleeves are connected to the end faces of the adjusting screws, the two valve core guide sleeves are respectively in sliding fit with the inner walls of the fourth chamber and the fifth chamber, the left end and the right end of the bidirectional adjusting valve core are respectively connected to the two valve core guide sleeves, and one end of the spring is tightly attached to the valve core guide sleeves.
Alternatively, the high-precision flow proportional control valve further comprises an O-shaped sealing ring, wherein the O-shaped sealing ring is sleeved on the outer surface of the adjusting screw and forms sealing with the inner wall of the fourth chamber and the inner wall of the fifth chamber.
Alternatively, the surface of the bidirectional regulating valve core is provided with two spring positioning surfaces, the two spring positioning surfaces are respectively positioned between the first spring and the valve core conical surface, and between the second spring and the other valve core conical surface, and the two spring positioning surfaces are tightly attached to one end of the spring.
Alternatively, the high-precision flow proportional control valve further comprises a rotary connecting pin, the rotary connecting pin is respectively and rotatably connected to the two-way regulating valve core and the piston assembly, a pin hole is formed in the rotary connecting pin, and two ends of the regulating lever are connected with the pin hole.
Alternatively, the high-precision flow proportional control valve further comprises an adjusting lever rotating fulcrum, wherein the adjusting lever rotating fulcrum is positioned in the third cavity and hinged with the adjusting lever, and the hinge point is positioned between the adjusting lever and a rotating connecting point of the two-way adjusting valve core and the piston assembly.
Alternatively, the first and second chambers are symmetrical about a third chamber and the fourth and fifth chambers are symmetrical about the third chamber.
Alternatively, the cross-sectional area of the first piston in contact with the medium is different from the cross-sectional area of the second piston in contact with the medium.
An aircraft, wherein a plurality of storage tanks or storage tanks are arranged in the aircraft, any two storage tanks or storage tanks are connected through a high-precision flow proportional control valve in the claim, and the storage tanks or storage tanks are filled with gas or liquid.
Compared with the prior art, the valve core provided by the invention has an automatic feedback adjusting structure, can be used for adjusting the flow proportion of a working medium entering a valve with high precision, and specifically has the following advantages:
(1) Two valve core conical surfaces on the two-way regulating valve core respectively form two throttling channels with the inner wall of the fourth chamber and the inner wall of the fifth chamber, and the area (annular area) of the two throttling channels is changed by the left and right movement of the two-way regulating valve core, so that the flow is changed;
(2) The piston assembly, the adjusting lever and the two-way adjusting valve core form an automatic feedback adjusting mechanism, and working media entering the first inlet and the second inlet are automatically adjusted by sensing pressure change;
(3) The throttle ring and the adjusting screw are used for adjusting the flow and the flow proportion control sensitivity according to the actual working condition;
(4) The whole high-precision flow proportional control valve is of a pure mechanical structure, has low failure rate and high reliability, is convenient to replace and maintain, and can recover normal work by simply replacing corresponding worn components when abrasion and other conditions occur;
(5) The rotating force arm can be adjusted through changing the rotating pivot of the adjusting lever, so that the sensitivity of the high-precision flow proportional control valve is adjusted;
(6) The device is suitable for connecting different storage tanks or storage tanks in the aircraft, and ensures that the influence of the mass center change of the aircraft is controllable.
Drawings
FIG. 1 is a schematic diagram of a high-precision flow proportional control valve according to the present invention;
FIG. 2 is a schematic diagram of the state of the flow proportional control valve when the high-precision flow proportional control valve senses a pressure change and performs flow regulation;
In the drawings, 1-valve housing; 2-a two-way regulating valve core; 3-a spring; 4-a valve core guide sleeve; a 5-O-shaped sealing ring; 6-adjusting the screw; 7-a throttle ring; 8-a piston assembly; 9-rotating the connecting pin; 10-adjusting the lever; 11-adjusting a lever rotation fulcrum; 12-a valve core conical surface; 13-throttle passage.
Detailed Description
The present invention will be further described with reference to the drawings and the specific embodiments, but it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments, and various modifications, substitutions and alterations made according to the ordinary skill and familiar means of the art to which this invention pertains are included within the scope of the present invention without departing from the above technical idea of the invention.
As an embodiment of the present invention, as shown in fig. 1 to 2, the high-precision flow proportional control valve mainly comprises a valve housing 1, a bidirectional regulating valve core 2, a spring 3, a valve core guiding sleeve 4, an O-shaped sealing ring 5, a regulating screw 6, a throttle ring 7, a piston assembly 8, a rotary connecting pin 9, a regulating lever 10, and the like. Wherein the piston component 8 and the spring 3 are automatic adjusting feedback devices; the bidirectional regulating valve core 2 is an automatic regulating executing device, and valve core conical surfaces 12 at two ends of the bidirectional regulating valve core 2 and corresponding channels form a throttling channel 13 with adjustable area, which corresponds to an A1 flow section (annular) and an A2 flow section (annular) in fig. 1 and 2.
The valve housing 1 is provided with a first inlet, a second inlet and an outlet, and a first chamber, a second chamber, a third chamber, a fourth chamber and a fifth chamber are arranged in the valve housing 1, wherein one end of the first chamber is communicated with the first inlet; one end of the second chamber is communicated with the second inlet; the third chamber is respectively communicated with the fourth chamber, the fifth chamber and the outlet; the fourth chamber is connected with the first chamber, the fifth chamber is communicated with the second chamber, the first chamber and the second chamber are symmetrical about the third chamber, and the fourth chamber and the fifth chamber are symmetrical about the third chamber.
The bidirectional regulating valve core 2 is a variable-section shaft, and is provided with a valve core conical surface 12 and a spring positioning surface, and the bidirectional regulating valve core 2 spans the fourth chamber, the third chamber and the fifth chamber.
The adjusting lever 10 is arranged in the third chamber, and two ends of the adjusting lever are respectively connected with the bidirectional adjusting valve core 2 and the piston assembly 8 in a rotating way through rotating connecting pins 9.
The two ends of the spring 3 are respectively clung to the spring positioning surface and the valve core guide sleeve 4.
The piston assembly 8 spans the first chamber, the third chamber and the second chamber, and the first piston and the second piston are respectively in sliding connection with the inner wall of the first chamber and the inner wall of the second chamber.
Before the high-precision flow proportional control valve is installed and used, throttle rings 7 can be installed at inlets at two ends of the valve respectively and used for controlling flow values of working mediums at two ends in a rated state; if the throttle is not needed for depressurization, the installation of the throttle ring 7 can be omitted. The pretightening force of the springs 3 at the two ends on the two-way regulating valve core 2 is regulated by screwing in or screwing out the corresponding regulating screw 6; the compression amount and the pretightening force of the springs 3 at the two ends are equal in the initial state, and the axis of the adjusting lever 10 is ensured to coincide with the central axis of the valve body. The tightening torque of the adjusting screw 6 can be adjusted according to the actual working requirements. The larger the tightening torque of the adjusting screw 6 is, the lower the sensitivity is when the flow ratio is adjusted; conversely, the higher the sensitivity in controlling the flow ratio adjustment.
When the high-precision flow proportional control valve works, the pressures of working media entering the valve at two ends of the piston assembly 8 are P1 and P2 respectively.
When the working media at the two ends are in the rated state, the acting force generated by the pressure P1 on the piston assembly 8 is equal to the acting force generated by the pressure P2 on the piston assembly 8, the piston assembly 8 does not move, and the flowing state of the working media at the two ends in the valve is kept unchanged.
When the working medium at two ends is influenced by external pressure supply fluctuation and the flow quantity of the working medium inlet at the left end is increased, P1 is increased; at this time, the acting force of the pressure P1 on the piston assembly 8 is greater than the acting force of the pressure P2 on the piston assembly 8, the piston assembly 8 slides rightward, and the adjusting lever 10 rotates counterclockwise around the adjusting lever rotating fulcrum 11 under the driving action of the rotating connecting pin 9, so that the bidirectional adjusting valve core 2 slides leftward. At the moment, the A1 flow area of a throttling channel 13 formed by the valve core conical surface 12 at the left end of the bidirectional regulating valve core 2 and the valve body channel is reduced, so that the flow of working medium passing through the left end channel is reduced; the A2 flow area of the throttling channel 13 formed by the conical surface 12 of the valve core at the right end of the two-way regulating valve core 2 and the valve body channel is increased, so that the flow rate of working medium passing through the right end channel is increased, and the purpose of stabilizing the flow rate proportion of the working medium at the two ends of the valve body is achieved. When the disturbance of the external pressure disappears, the pressure P1 returns to the rated state, the resultant force of the hydraulic pressure acting on the piston assembly 8 to the right disappears, and the bidirectional regulating valve core 2 is only influenced by the acting forces of the springs 3 at the two ends. At the moment, the force generated by the left end spring 3 of the bidirectional regulating valve core is larger than the force generated by the right end spring 3, and the bidirectional regulating valve core 2 integrally slides rightwards to the original rated state; and the adjusting lever 10 rotates clockwise around the adjusting lever rotating supporting point 11 under the driving action of the rotating connecting pin 9, so that the piston assembly 8 is restored to the original state, and the adjusting lever rotating supporting point 11 is fixed in the third cavity and hinged with the hinge hole on the adjusting lever 10 through a pin shaft.
Conversely, if the pressure P2 is influenced by the external pressure fluctuation, the acting force of the pressure P2 on the piston assembly 8 is greater than the acting force of the pressure P2 on the piston assembly 8, and corresponding feedback adjustment can be performed.
The high-precision flow proportional control valve is provided with an automatic feedback adjusting mechanism mainly comprising a piston assembly 8, an adjusting lever 9, a bidirectional adjusting valve core 10 and a spring 3, wherein the working medium which is adjusted and controlled is liquid or gas.
The high-precision flow proportional control valve is provided with a throttle ring 7 and an adjusting screw 6, and can adjust the flow and the flow proportional control sensitivity according to the actual working condition.
The high-precision flow proportional control valve can be used for disassembling, assembling and replacing corresponding components according to actual working conditions and component abrasion conditions, and has strong applicability and maintainability.
The two-way regulating valve core 2 is assembled on the valve core guide sleeve 4, and two ends of the two-way regulating valve core are respectively provided with a valve core conical surface 12 for regulating the area of a throttle channel 13. The spring 3 is positioned between the valve core guide sleeve 4 and the step beside the valve core conical surface 12. The adjusting screw 6 is in threaded connection with the valve housing 1 and is sealed by an O-shaped sealing ring 5.
The stress pistons at the two ends of the piston assembly 8 can be designed into pistons with equal areas according to actual working requirements, and can also be designed into pistons with different stress areas (namely, the sizes D1 and D2 in the figures 1 and 2 can be equal or unequal).
The ratio of the turning force arm of the adjusting lever 10 between the piston assembly 8 and the bidirectional adjusting valve core 2 can be designed to be different states according to the actual working requirement and the sensitivity requirement, in this embodiment, the distance from the adjusting lever turning fulcrum 11 to the turning connection point of the bidirectional adjusting valve core 2 and the adjusting lever 10 is smaller than the distance from the adjusting lever turning fulcrum 11 to the turning connection point of the adjusting lever 10 and the piston assembly 8, and the adjusting lever turning fulcrum 11 is aligned with the two turning connection points.
The high-precision flow proportional control valve in the embodiment is used for synchronous discharge control between two storage tanks or storage tanks, and media at two ends can be the same liquid or different liquids to be mixed, and can also be gas.
The above examples are illustrative of the inventive concept and do not limit the final scope of protection, and any embodiments based on the inventive concept should fall within the scope of protection of the invention.
Claims (9)
1. A high-precision flow proportional control valve is characterized in that: comprising the steps of (a) a step of,
The valve housing (1), the valve housing (1) is provided with a first inlet, a second inlet and an outlet, the valve housing (1) is internally provided with a first cavity, a second cavity, a third cavity, a fourth cavity and a fifth cavity,
One end of the first chamber is communicated with the first inlet;
one end of the second chamber is communicated with the second inlet;
the third chamber is respectively communicated with the fourth chamber, the fifth chamber and the outlet;
the fourth chamber is connected with the first chamber, and the fifth chamber is communicated with the second chamber;
The two-way regulating valve core (2) is positioned in the third cavity, the left end and the right end of the two-way regulating valve core (2) respectively extend into the fourth cavity and the fifth cavity, two valve core conical surfaces (12) are arranged on the surface of the two-way regulating valve core (2), and the two valve core conical surfaces (12) respectively form two throttling channels (13) with the inner wall of the fourth cavity and the inner wall of the fifth cavity;
The adjusting screw (6) comprises a first adjusting screw and a second adjusting screw, the first adjusting screw is connected with one end of the fourth chamber in a threaded mode, the first adjusting screw is connected with one end of the two-way adjusting valve core (2), the second adjusting screw is connected with one end of the fifth chamber in a threaded mode, and the second adjusting screw is connected with the other end of the two-way adjusting valve core (2);
the spring (3) comprises a first spring and a second spring, the first spring is positioned in the fourth cavity and sleeved on the bidirectional regulating valve core (2), the second spring is positioned in the fifth cavity and sleeved on the bidirectional regulating valve core (2), the first spring is positioned between the first regulating screw and the valve core conical surface (12), and the second spring is positioned between the second regulating screw and the other valve core conical surface (12);
The piston assembly (8) spans the first chamber, the second chamber and the third chamber, the piston assembly (8) comprises a first piston and a second piston, the first piston is in sliding connection with the inner wall of the first chamber, and the second piston is in sliding connection with the inner wall of the second chamber;
the two ends of the adjusting lever (10) are respectively connected with the two-way adjusting valve core (2) and the piston assembly (8) in a rotating way;
the adjusting lever rotating fulcrum (11) is positioned in the third cavity and hinged with the adjusting lever (10), and the hinge point is positioned between the rotating connection points of the adjusting lever (10) and the two-way adjusting valve core (2) and the piston assembly (8).
2. The high-precision flow proportional control valve of claim 1, wherein: the device also comprises throttle rings (7), and the two throttle rings (7) are detachably connected in the first cavity and the second cavity respectively.
3. The high-precision flow proportional control valve of claim 1, wherein: the valve core guide sleeve (4) is connected to the end face of the adjusting screw (6), the two valve core guide sleeves (4) are respectively in sliding fit with the inner walls of the fourth chamber and the fifth chamber, the left end and the right end of the two-way adjusting valve core (2) are respectively connected to the two valve core guide sleeves (4), and one end of the spring (3) is tightly attached to the valve core guide sleeves (4).
4. The high-precision flow proportional control valve of claim 1, wherein: the novel air conditioner further comprises an O-shaped sealing ring (5), wherein the O-shaped sealing ring (5) is sleeved on the outer surface of the adjusting screw (6) and forms sealing with the inner wall of the fourth chamber and the inner wall of the fifth chamber.
5. The high-precision flow proportional control valve of claim 1, wherein: the surface of the bidirectional regulating valve core (2) is provided with two spring positioning surfaces, the two spring positioning surfaces are respectively positioned between the first spring and the valve core conical surface (12) and between the second spring and the other valve core conical surface (12), and the two spring positioning surfaces are tightly attached to one end of the spring (3).
6. The high-precision flow proportional control valve of claim 1, wherein: the rotary valve further comprises a rotary connecting pin (9), the rotary connecting pin (9) is respectively and rotatably connected to the two-way regulating valve core (2) and the piston assembly (8), a pin hole is formed in the rotary connecting pin (9), and two ends of the regulating lever (10) are connected with the pin hole.
7. The high-precision flow proportional control valve of claim 1, wherein: the first and second chambers are symmetrical about a third chamber and the fourth and fifth chambers are symmetrical about the third chamber.
8. The high-precision flow proportional control valve of claim 1, wherein: the cross-sectional area of the first piston, which is in contact with the medium, is different from the cross-sectional area of the second piston, which is in contact with the medium.
9. An aircraft having a plurality of tanks or reservoirs therein, characterized by: any two storage tanks or storage tanks are connected through the high-precision flow proportional control valve in claim 1, and the storage tanks or storage tanks are filled with gas or liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111458410.7A CN114185368B (en) | 2021-12-01 | 2021-12-01 | High-precision flow proportional control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111458410.7A CN114185368B (en) | 2021-12-01 | 2021-12-01 | High-precision flow proportional control valve |
Publications (2)
| Publication Number | Publication Date |
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| CN114185368A CN114185368A (en) | 2022-03-15 |
| CN114185368B true CN114185368B (en) | 2024-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111458410.7A Active CN114185368B (en) | 2021-12-01 | 2021-12-01 | High-precision flow proportional control valve |
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| CN (1) | CN114185368B (en) |
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| Publication number | Publication date |
|---|---|
| CN114185368A (en) | 2022-03-15 |
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