CN114658900B - Vibration-proof check valve - Google Patents
Vibration-proof check valve Download PDFInfo
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- CN114658900B CN114658900B CN202210406628.6A CN202210406628A CN114658900B CN 114658900 B CN114658900 B CN 114658900B CN 202210406628 A CN202210406628 A CN 202210406628A CN 114658900 B CN114658900 B CN 114658900B
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- valve core
- vibration
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- 238000007789 sealing Methods 0.000 claims abstract description 58
- 230000000903 blocking effect Effects 0.000 claims abstract description 25
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 230000004323 axial length Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 8
- 230000002265 prevention Effects 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 230000009471 action Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/01—Damping of valve members
- F16K47/011—Damping of valve members by means of a dashpot
- F16K47/0112—Damping of valve members by means of a dashpot the valve members comprising a dashpot sliding over a fixed plunger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
- F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/54—Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
- F16K15/026—Check valves with guided rigid valve members the valve being loaded by a spring the valve member being a movable body around which the medium flows when the valve is open
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
- F16K3/26—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
- F16K3/267—Combination of a sliding valve and a lift valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
- F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
The invention provides a vibration prevention one-way valve, which belongs to the technical field of one-way valves and comprises: a housing having an inlet and an outlet for the passage of a medium; an adjusting member; a valve core; the valve core is provided with a flow limiting through hole, and the sectional area of the flow limiting through hole is gradually reduced along the medium flowing direction; when the sealing end is positioned at the sealing position, the blocking part is blocked on the flow-limiting through hole; when the sealing end is positioned at the circulation position, the plugging part partially or completely avoids the flow limiting through hole; an elastic member; according to the anti-vibration check valve, in the moving process of the valve core, the area of the blocking part blocked on the flow-limiting through hole is gradually reduced, the flow-through area is gradually increased, but the flow-through area is always smaller than the inlet, the pressure at the inlet is gradually increased, and the speed of the valve core is further accelerated, so that the working time of the valve core under a small flow working condition is shortened, and the vibration phenomenon is effectively restrained.
Description
Technical Field
The invention relates to the technical field of check valves, in particular to an anti-vibration check valve.
Background
The one-way valve is one of the most widely used single products in the carrier rocket pressurizing and conveying system and the attitude and orbit control power system, and is generally composed of an inlet shell, an outlet shell, a valve assembly, an elastic element, a guide structure, a static seal and other components, and the function of the one-way valve is to realize the one-way flow of working medium. The check valve generally has three operating states: when the pressure difference force of the inlet and the outlet is smaller than the pretightening force of the elastic element, the valve is contacted with the valve seat under the pretightening force of the elastic element, so that the valve is sealed and is in a closed state; when the pressure difference force of the inlet and the outlet is increased to be larger than the pretightening force of the elastic element, the valve is opened by overcoming the elasticity of the elastic element under the action of the pressure difference force of the medium, the flow path is smooth, and the valve is in an opened state; when the inlet pressure is lower than the outlet pressure, the valve contacts with the valve seat under the action of the pretightening force of the elastic element and the reverse pressure difference force, so that the sealing is realized, the valve is in a closed state, and the sealing performance of the valve is better as the reverse pressure difference force is larger.
Chatter is a typical phenomenon occurring during the opening and closing process of a general check valve and during low flow operation. When the valve is opened and closed and works at a small flow rate, the deformation of the elastic element is slightly increased and the elasticity is increased compared with the closed state, and the pressure difference force for driving the valve to move towards the opening direction is insufficient to continuously overcome the elasticity due to the fact that the medium flow rate is small, so that the valve generates high-frequency reciprocating motion near the balance position, namely the flutter phenomenon. The vibration can increase the load frequency of the sealing surface of the valve, aggravate the abrasion of the guiding surface between the valve and the guiding structure, accelerate the fatigue failure of the elastic element, seriously affect the safety and the service life of the one-way valve, and further endanger the normal operation of the system. Therefore, the vibration prevention measures should be taken in a targeted manner when designing the structure of the one-way valve.
At present, the common vibration prevention technology of the check valve is to increase the motion damping of the valve, such as a stainless steel spring ring, a corrugated expansion ring, a nonmetallic lining and the like, and the method can inhibit the vibration of the check valve to a certain extent, but also increases the risk of clamping stagnation of parts and reduces the reliability of products.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defects that the risk of part clamping stagnation is increased and the reliability of the product is reduced by an improved mode in the prior art, so that the anti-vibration one-way valve is provided.
In order to solve the technical problems, the invention provides an anti-vibration check valve, which comprises:
A housing having an inlet and an outlet for the passage of a medium;
The adjusting piece is arranged in the shell; the regulating piece comprises a blocking part and a circulation channel communicated with the outlet;
The valve core is sleeved outside the adjusting piece in a sliding way; the valve core is provided with a sealing end; the sealing end has a sealing position blocking the inlet and also has a flow-through position away from the inlet; the valve core is provided with a flow limiting through hole, and the sectional area of the flow limiting through hole is gradually reduced along the medium flowing direction;
When the sealing end is positioned at the sealing position, the blocking part is blocked on the flow-limiting through hole; when the sealing end is positioned at the circulation position, the plugging part partially or completely avoids the flow limiting through hole;
an elastic member disposed between the valve element and the regulating member; the elastic member has a driving force for driving the sealing end to move from the circulation position to the sealing position.
Preferably, the flow limiting through holes are multiple and are arranged at intervals along the circumferential direction of the valve core; the blocking part is in an annular flange shape.
Preferably, the flow-limiting through holes are triangular, and the vertex angle faces the flowing direction of the medium.
Preferably, an annular shoulder which is in sealing abutting connection with the inner part of the shell is arranged on the outer surface of the valve core; the annular shoulder is arranged on one side of the flow limiting through hole, which is close to the outlet; the annular shoulder, the shell and the adjusting piece enclose to form a containing cavity for placing the elastic piece.
Preferably, the adjusting member has an annular limiting groove extending toward the accommodating cavity, and the elastic member abuts against the annular limiting groove.
Preferably, a first flow hole is formed in the side wall of the adjusting piece; the flow channel communicates with the accommodation chamber through the first flow hole.
Preferably, the plugging part is provided with a through second flow hole.
Preferably, the housing includes:
The first shell is provided with an inlet for medium circulation;
The second shell is sleeved on the first shell; an outlet for medium circulation is formed in the second shell; the second shell is in threaded connection with the first shell.
As a preferable scheme, an annular groove is formed in the outer surface of the first shell, and a sealing rubber ring is arranged in the annular groove.
Preferably, the axial length of the flow limiting through hole is equal to the length of the movable distance of the valve core.
The technical scheme of the invention has the following advantages:
1. The invention provides a vibration prevention check valve, comprising: the valve comprises a shell, an adjusting piece, a valve core and an elastic piece; when the valve is in a closed state, namely the sealing end is in a sealing position under the action of the elastic force of the elastic piece; when the valve core gradually enters the inlet, the sealing end is pressed, the pressure overcomes the elastic force of the elastic piece and drives the valve core to move, namely the sealing end is at a circulation position; the sectional area of the flow limiting through hole is gradually reduced along the medium flowing direction, so that the area of the plugging part plugged on the flow limiting through hole is gradually reduced and the overflow area is gradually increased in the moving process of the valve core, but the overflow area is always smaller than the inlet, the pressure at the inlet is gradually increased, and the speed of the valve core is further accelerated, so that the working time of the valve core under the working condition of small flow is shortened, and the flutter phenomenon is effectively restrained.
2. According to the anti-vibration one-way valve provided by the invention, the flow limiting through hole is triangular, so that the flow passing area is parabolic along with the change rule of the stroke of the valve core, and the like, therefore, the increase rate of the flow passing area is slower at the initial stage of the movement of the valve core, and the vibration phenomenon can be effectively inhibited.
3. The invention provides a vibration prevention one-way valve, wherein a first flow hole is formed in the side wall of a regulating piece; the first flow hole is arranged for exhausting the medium in the accommodating cavity.
4. The anti-vibration one-way valve provided by the invention has the advantages that the second flow hole is formed in the blocking part, and the second flow hole is used for balancing the pressure difference between the upstream and downstream of the blocking part.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic cross-sectional view of a vibration-preventing check valve of the present invention.
Fig. 2 is a schematic perspective view of a valve core according to the present invention.
Fig. 3 is a schematic cross-sectional view of the valve element of the present invention.
Fig. 4 is a schematic perspective view of an adjusting member according to the present invention.
Fig. 5 is a schematic cross-sectional view of the adjusting member of the present invention.
FIG. 6 is a graph of percent valve spool travel versus area ratio of flow through each position in accordance with the present invention.
Reference numerals illustrate:
1. A first housing; 2. a second housing; 3. an inlet; 4. an outlet; 5. a valve core; 6. a nonmetallic sealing block; 7. a flow-limiting through hole; 8. an annular shoulder; 9. an elastic member; 10. an adjusting member; 11. a blocking part; 12. an annular groove; 13. an overflow hole; 14. a flow-through chamber; 15. an annular limit groove; 16. a first flow hole; 17. a second flow hole; 18. and (5) sealing the rubber ring.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The embodiment provides a vibration prevention one-way valve, as shown in fig. 1, which comprises a shell, wherein an inlet 3 and an outlet 4 for medium circulation are formed in the shell; an adjusting member 10 is arranged in the interior of the housing, and the adjusting member 10 comprises a blocking portion 11 and a flow passage communicated with the outlet 4; a valve core 5 is slidably arranged outside the adjusting piece 10, one end of the valve core 5 is a sealing end, and the sealing end is provided with a sealing position blocked at the inlet 3 and also provided with a circulation position far away from the inlet 3; meanwhile, a flow limiting through hole 7 is formed in the outer wall of the valve core 5, and the sectional area of the flow limiting through hole 7 is gradually reduced along the medium flowing direction; when the sealing end is at a sealing position, the blocking part 11 is blocked on the flow-limiting through hole 7; when the sealing end is in the circulation position, the blocking part 11 partially or completely avoids the flow-limiting through hole 7. An elastic member 9 is provided between the valve body 5 and the regulating member 10, and the elastic member 9 has a driving force for driving the sealing end to move from a flow position to a sealing position.
When the valve is in a closed state, i.e. the sealing end is in a sealing position under the action of the elastic force of the elastic element 9; when gradually entering the inlet 3, the sealing end is pressed, and the pressure overcomes the elastic force of the elastic piece 9 to drive the valve core 5 to move, namely the sealing end is at a circulation position; the sectional area of the flow limiting through hole 7 is gradually reduced along the medium flowing direction, so that the area of the plugging part 11 plugged on the flow limiting through hole 7 is gradually reduced and the overflow area is gradually increased in the moving process of the valve core 5, but the overflow area is always smaller than the position of the inlet 3, the pressure at the position of the inlet 3 is gradually increased, and the speed of the valve core 5 is further accelerated, so that the working time of the valve core 5 under the working condition of small flow is shortened, and the flutter phenomenon is effectively restrained.
As shown in fig. 2 and 3, the valve core 5 has an annular structure, the outer diameter of the valve core 5 is smaller than the inner diameter of the shell, and a gap is formed between the outer surface of the valve core 5 and the inside of the shell; the valve core 5 is internally provided with a cavity with one end open; one end of the valve core 5 is a sealing end, in particular, a dovetail groove is formed at the end of the valve core 5, and a nonmetallic sealing block 6 is placed in the dovetail groove through a pressing process to carry out stroke sealing end; the non-metal sealing block 6 has a hardness smaller than that of a metal material, and can have good sealing performance when being in direct contact with the inlet 3 of the housing to form a seal.
A plurality of flow-limiting through holes 7 are arranged at intervals in the circumferential direction of the valve core 5, the flow-limiting through holes 7 are opposite holes, in the scheme, the flow-limiting through holes 7 are triangular, further isosceles triangles, and one vertex angle of each isosceles triangle faces the flow direction of the medium, namely the direction of the outlet 4; the three inner corners of the flow-limiting through hole 7 are respectively provided with a round angle R0.1-R0.2 to adapt to processing. The axial length of the flow limiting through hole 7 is equal to the length of the movable distance of the valve core 5, and in this embodiment, the length of the perpendicular bisector of the isosceles triangle is equal to the length of the movable distance of the valve core 5.
The outer surface of the valve core 5 is provided with an annular shoulder 8, and the outer surface of the annular shoulder 8 is in sealing abutting joint with the inner wall of the shell; the annular shoulder 8 is arranged on one side of the flow limiting through hole 7 close to the outlet 4; the annular shoulder 8, the inside of the shell and the adjusting piece 10 are enclosed to form a containing cavity, the containing cavity is internally used for containing the elastic piece 9, and one end of the elastic piece 9 is abutted with one side of the annular shoulder 8.
As shown in fig. 4 and 5, the blocking part 11 of the adjusting piece 10 is in the shape of an annular shoulder 8, and the outer surface can be blocked on the flow-limiting through hole 7; the regulating element 10 is also provided with a flow channel; the concrete structure is that the adjusting piece 10 is divided into an upper end and a lower end through an annular groove 12, a blocking part 11 is formed at one end, an overflow hole 13 is formed at the end of the other end, a circulation cavity 14 is formed at the other end of the overflow hole 13, and the annular groove 12, the overflow hole 13 and the circulation cavity 14 jointly form a circulation channel of the adjusting piece 10; the width of the annular groove 12 is larger than or equal to the axial length of the limiting through hole; the overflow aperture 13 has a fan shape.
When the sealed end is in sealed position, the shutoff portion 11 shutoff of regulating part 10 is on spacing through-hole, and the tip that shutoff portion 11 is close to export 4 aligns with the position that is close to export 4 of restriction through-hole 7, when rivers have pressure to case 5, when pushing the case 5 to remove, sealed end is in the circulation position, restriction through-hole 7 and ring channel 12 intercommunication, along with the removal of case 5, restriction through-hole 7 and ring channel 12's intercommunication cross-section increase gradually, after case 5 reaches the biggest removal stroke, restriction through-hole 7 corresponds the setting with ring channel 12 entirely, realizes biggest circulation cross-section.
The end part of the adjusting piece 10 is provided with an annular limiting groove 15 which extends towards the accommodating cavity, and the other end of the elastic piece 9 is abutted in the annular limiting groove 15; when the sealing end is in the sealing position, the end of the valve core 5 has a spacing distance from the edge of the annular limiting groove 15, and the spacing distance is the movable stroke of the valve core 5.
At the position of the outer wall of the adjusting member 10 corresponding to the spacing distance, a first flow hole 16 is provided, and the first flow hole realizes the communication between the flow channel and the accommodating cavity, so that the medium entering the accommodating cavity can be emptied.
The blocking part 11 is provided with through second flow holes 17 which are uniformly arranged along the circumferential direction, and the arrangement of the second flow holes 17 can balance the upstream pressure difference and the downstream pressure difference of the blocking part 11 in the moving process of the valve.
The shell comprises a first shell 1 and a second shell 2 in threaded connection with the first shell 1; an inlet 3 for medium circulation is formed in the first shell 1, and an outlet 4 for medium circulation is formed in the second shell 2; the inlet 3 and the outlet 4 are arranged opposite.
Further, an annular groove is formed in the outer surface of the first shell 1, a sealing rubber ring 18 is arranged in the annular groove, and leakage of medium flowing inside can be effectively prevented by the aid of the sealing rubber ring 18.
Application method and principle
When no medium flows, the valve core 5 drives the sealing end to be in close contact with the inlet 3 of the shell under the action of the elastic force of the elastic piece 9, so that sealing is realized, and the blocking part 11 completely blocks the flow limiting through hole 7.
When the flow of the medium starts, the valve core 5 is pushed to gradually move, the sealing end is gradually far away from the inlet 3 and starts to be in a flowing position, along with the movement of the valve core 5, the area of the blocking part 11 covering the limiting through hole is gradually reduced, the overflow area is gradually increased, but the overflow area of the area is always smaller than that of the inlet 3 of the shell, so that the projection area of the valve core 5 subjected to pressure difference is much larger than that of the valve core in a closing state in an opening state, the opening speed of the valve core 5 is accelerated by the increase of the pressure difference force in the opening state of the valve core 5, the working time of the valve core 5 under a small flow working condition is shortened, and the flutter phenomenon is effectively restrained; in addition, as shown in fig. 6, the limiting through holes are designed to be isosceles triangles, so that the change rule of the overflow area along with the valve core 5 is parabolic, that is, the change rate of the overflow area of the valve core 5 at the initial opening stage and the final closing stage is slower, and the flutter phenomenon can be effectively inhibited.
When the valve core 5 is completely opened, the flow area of the flow limiting through hole 7 is larger than the effective area of the inlet and the outlet 4 of the shell, so that the smooth flow of the medium can be kept.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (10)
1. A vibration-proof check valve, comprising:
a housing having an inlet (3) and an outlet (4) for the medium to circulate;
An adjusting member (10) disposed in the housing; the regulating piece (10) comprises a blocking part (11) and a circulation channel communicated with the outlet (4);
The valve core (5) is sleeved outside the adjusting piece (10) in a sliding manner; the valve core (5) is provided with a sealing end; the sealing end has a sealing position blocking the inlet (3) and also has a flow-through position remote from the inlet (3); a flow limiting through hole (7) is formed in the valve core (5), and the sectional area of the flow limiting through hole (7) is gradually reduced along the medium flowing direction;
when the sealing end is positioned at the sealing position, the blocking part (11) is blocked on the flow-limiting through hole (7); when the sealing end is positioned at the circulation position, the blocking part (11) partially or completely avoids the flow limiting through hole (7); when the sealing end is at the circulation position, the area of the blocking part (11) covering the flow-limiting through hole (7) is gradually reduced along with the movement of the valve core (5), and the flow-through area is gradually increased, but the flow-through area is always smaller than that of the inlet (3) of the shell;
An elastic member (9) provided between the valve element (5) and the regulating member (10); the elastic member (9) has a driving force for driving the sealing end to move from the circulation position to the sealing position.
2. The anti-vibration one-way valve according to claim 1, wherein the flow limiting through holes (7) are arranged at intervals along the circumferential direction of the valve core (5); the blocking part (11) is in an annular flange shape.
3. The anti-vibration one-way valve according to claim 2, characterized in that the flow-limiting through hole (7) is triangular and has a top angle directed in the flow direction of the medium.
4. The anti-vibration one-way valve according to claim 1, characterized in that the outer surface of the valve core (5) is provided with an annular shoulder (8) in sealing abutment with the interior of the housing; the annular shoulder (8) is arranged at one side of the flow limiting through hole (7) close to the outlet (4); the annular shoulder (8), the housing and the adjusting element (10) enclose a receiving space for receiving an elastic element (9).
5. The anti-vibration one-way valve according to claim 4, wherein the adjusting member (10) has an annular limiting groove (15) formed by extending into the accommodating cavity, and the elastic member (9) abuts in the annular limiting groove (15).
6. The anti-vibration one-way valve according to claim 4, wherein the side wall of the regulator (10) is provided with a first flow hole (16); the flow channel communicates with the receiving chamber via the first flow opening (16).
7. The anti-vibration one-way valve according to claim 1, wherein the blocking portion (11) is provided with a second through hole (17) therethrough.
8. The anti-flutter check valve of claim 1, wherein said housing comprises:
a first housing (1) provided with an inlet (3) for medium circulation;
The second shell (2) is sleeved on the first shell (1); an outlet (4) for medium circulation is formed in the second shell (2); the second shell (2) is in threaded connection with the first shell (1).
9. The anti-vibration one-way valve according to claim 8, wherein the outer surface of the first housing (1) is provided with an annular groove, and a sealing rubber ring (18) is arranged in the annular groove.
10. The anti-flutter check valve according to any one of claims 1 to 9, characterized in that the axial length of the flow-limiting through hole (7) is equal to the length of the movable distance of the valve core (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210406628.6A CN114658900B (en) | 2022-04-18 | 2022-04-18 | Vibration-proof check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210406628.6A CN114658900B (en) | 2022-04-18 | 2022-04-18 | Vibration-proof check valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
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| CN202441936U (en) * | 2012-02-28 | 2012-09-19 | 卢午明 | Shutoff safety valve |
| CN104895859A (en) * | 2014-03-06 | 2015-09-09 | 罗伯特·博世有限公司 | Valve assembly with load retaining function |
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| CN215258025U (en) * | 2021-08-13 | 2021-12-21 | 河南航天液压气动技术有限公司 | Ultralow opening pressure relief valve |
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| Publication number | Publication date |
|---|---|
| CN114658900A (en) | 2022-06-24 |
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