CN111237275B - High-pressure slide valve type one-way valve - Google Patents

High-pressure slide valve type one-way valve Download PDF

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Publication number
CN111237275B
CN111237275B CN202010024915.1A CN202010024915A CN111237275B CN 111237275 B CN111237275 B CN 111237275B CN 202010024915 A CN202010024915 A CN 202010024915A CN 111237275 B CN111237275 B CN 111237275B
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China
Prior art keywords
valve
sealing ring
valve body
valve core
groove
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CN111237275A (en
Inventor
湛从昌
陈兵
邓江洪
叶文杰
陈新元
郭媛
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Wuhan University of Science and Engineering WUSE
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Wuhan University of Science and Engineering WUSE
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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
    • F15B13/027—Check valves
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves
    • 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
    • F16K3/30—Details
    • F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/363—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a piston

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Multiple-Way Valves (AREA)
  • Check Valves (AREA)

Abstract

The invention belongs to the technical field of one-way hydraulic valves. In particular to a high-pressure slide valve type one-way valve. The technical proposal is as follows: the high-pressure slide valve type one-way valve comprises a valve body (3), a valve core (4), a spring (6), a left valve cover (1) and a right valve cover (8); the left valve cover (1) and the right valve cover (8) are arranged at the left end and the right end corresponding to the valve body (3) through bolts (16), the valve body (3) is internally provided with a valve core (4) and a spring (6), one end of the spring (6) is contacted with the right valve cover (8), and the other end of the spring (6) is contacted with the right end of the valve core (4); the right cylindrical surface of the valve core (4) is provided with a first combined sealing ring (11), the middle part of the inner wall of the valve body (3) is provided with a second combined sealing ring (13) near the right part, and the left cylindrical surface of the valve core (4) is provided with a third combined sealing ring (14); a left sealing ring (2) and a right sealing ring (7) are correspondingly arranged on the left end face and the right end face of the valve body (3). The invention has the characteristics of no hydraulic and mechanical impact, good sealing performance, good stability and long service life.

Description

High-pressure slide valve type one-way valve
Technical Field
The invention belongs to the technical field of one-way hydraulic valves. In particular to a high-pressure slide valve type one-way valve.
Background
At present, the check valve is adopted in a hydraulic system, the valve core structure of the check valve is in a conical shape or a spherical shape, the joint of the valve core and a valve seat of the existing check valve is in line contact, valve core dislocation easily occurs, and the joint is easy to wear due to frequent opening and closing and oscillation, so that a trace groove is generated, the sealing performance is influenced, the work of the check valve is unstable, and the service life is prolonged. When the hydraulic system is in high-frequency vibration, the check valve is also in high-frequency vibration at the moment, so that the valve core and the valve seat generate impact, and the hydraulic system is increased in vibration and noise to influence the working performance of the hydraulic system. And a small unloading valve is added when the high-pressure one-way valve is opened, so that the structure of the high-pressure one-way valve is more complex.
According to the research situation, a plurality of students use software such as fluent to simulate the fluid of the one-way valve, the structure is improved to a certain extent, the defects of large noise, easiness in blocking, poor opening speed and the like are effectively overcome, and most of valve core structures are spherical or conical. "a pilot operated check valve (CN 209725330)" discloses a pilot operated check valve with improved structure, the contact performance between the spherical surface and the through hole is improved, but the sealability is still to be improved; the ultra-high pressure hydraulic control one-way valve (CN 209469836U) discloses a one-way valve which works under the ultra-high pressure condition, and a piston which can be driven by liquid is arranged, so that the movement of a ball core can be assisted; the electromagnet controlled high pressure check valve (CN 209761891U) has raised automatic control level, fast response speed and no need of controlling oil path. However, in the above technology, the valve core is in a spherical or conical surface structure, the joint of the valve core and the valve seat is still in line contact, the abrasion of the contact surface is easy to be caused under mechanical impact and hydraulic impact, the tightness is poor, and the service life is reduced.
Disclosure of Invention
The invention aims to overcome the defects, and aims to provide the high-pressure slide valve type one-way valve which can realize no hydraulic and mechanical impact, and has good sealing performance, good stability and long service life.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
The high-pressure slide valve type one-way valve comprises a valve body, a valve core, a spring, a left valve cover and a right valve cover. The left valve cover and the right valve cover are arranged at the left end and the right end corresponding to the valve body through bolts, a valve core and a spring are arranged in the valve body, one end of the spring is contacted with the right valve cover, and the other end of the spring is contacted with the right end of the valve core; the right cylindrical surface of the valve core is provided with a first combined sealing ring, the middle part of the inner wall of the valve body is provided with a second combined sealing ring close to the right, and the left cylindrical surface of the valve core is provided with a third combined sealing ring; the left end face and the right end face of the valve body are correspondingly provided with a left sealing ring and a right sealing ring.
The valve body is tubular, and the right side of the middle part of the valve body is provided with a first oil port, the right side of the first oil port is provided with a second oil port, the opening of the first oil port faces upwards, the opening of the second oil port faces downwards, the center line of the first oil port and the center line of the second oil port are positioned on the same section, and the distance L1=23-40 mm between the center line of the first oil port and the center line of the second oil port. A first countersink groove and a second countersink groove are formed in the inner wall of the valve body, the groove width center line of the first countersink groove and the center line of the first oil port are positioned in the same section, and the groove width center line of the second countersink groove and the center line of the second oil port are positioned in the same section; the inner wall of the valve body is provided with a second sealing groove, the second sealing groove is positioned at the middle position of the first undercut groove and the second undercut groove, and the second sealing groove is provided with a second combined sealing ring; the two side surfaces of the second undercut groove are symmetrical annular inclined planes, and the included angle between the annular inclined planes and the inner wall is 40-45 degrees.
A control oil channel is arranged on the shell of the valve body along the axis, an oil outlet of the control oil channel is communicated with a left cavity of the valve body, an oil inlet of the control oil channel is communicated with a second oil port, and the distance between the oil outlet of the control oil channel and the left end face of the valve body is L < 2 > = 20-25 mm; the left end face and the right end face of the valve body are correspondingly provided with a left sealing groove and a right sealing groove, and the left sealing groove and the right sealing groove are correspondingly provided with a left sealing ring and a right sealing ring.
The valve core is an integral body formed by the core bar, a left cylinder at the left end of the core bar and a right cylinder at the right end of the core bar. The middle part of the left cylinder is provided with a third sealing groove, and the third sealing groove is provided with a third combined sealing ring; a first sealing groove is arranged at a position 5-10 mm away from the right end face of the right cylinder, and is provided with a first combined sealing ring; the third seal groove is the same as the first seal groove, and the first combined seal ring is the same as the third combined seal ring. The right end face of the right cylinder is coaxially provided with a right circular boss, the right circular boss is a mandrel of the spring, the diameter of the right circular boss is the same as the inner diameter of the spring, and a conical surface is arranged between the left end face of the right cylinder and the cylindrical surface.
The diameter of the left cylinder and the right cylinder of the valve core and the gap between the inner wall of the valve body are 5-10 mu m.
The inner side of the left valve cover is coaxially provided with a left circular boss, the height L3 of the left circular boss is equal to the distance L2 between the oil outlet of the control oil channel and the left end face of the valve body, and screw holes are uniformly formed in the left valve cover.
The center of right valve gap is equipped with the blind hole, and the blind hole is the spring holder, and the central point department of blind hole is equipped with the oil leakage mouth, evenly is equipped with the screw on the right valve gap.
The free length of the spring is 45-80 mm, and the compression amount is 22-40 mm.
In the closed state, the distance between the intersection line of the conical surface and the cylindrical surface of the right cylinder and the left side surface of the second sealing ring is 0.5-1 mm.
The third combined sealing ring consists of an inner sealing ring for the valve core and an outer sealing ring for the valve core. The cross section of the outer sealing ring for the valve core is rectangular; the cross section of the inner sealing ring for the valve core is I-shaped, the two sides of the cross section of the inner sealing ring for the valve core are symmetrical circular arcs, and the width of the middle part of the inner sealing ring for the valve core is 3-4 mm; the width of the inner sealing ring for the valve core and the width of the outer sealing ring for the valve core are the same as the nominal width of the third sealing groove, and the width is 5-6 mm; the height of the inner sealing ring for the valve core is 3-5 mm, the height of the outer sealing ring for the valve core is 2-3 mm, and the sum of the height of the inner sealing ring for the valve core and the height of the outer sealing ring for the valve core is the same as the nominal size of the height of the third sealing groove.
The second combined sealing ring consists of an inner sealing ring for the valve body and an outer sealing ring for the valve body. The cross-sectional shape of the inner sealing ring for the valve body is the same as that of the outer sealing ring for the valve core, and the cross-sectional shape of the outer sealing ring for the valve body is the same as that of the inner sealing ring for the valve core.
The valve body and the valve core are made of 45 # steel.
The cone angle of the conical surface is 30-35 degrees, and the bus length is 3-5 mm.
The diameter of the left circular boss is 0.35-0.5 times of the diameter of the valve core.
The inner sealing ring for the valve core is made of oil-resistant rubber materials.
The outer sealing ring for the valve core is made of tetrafluoroethylene.
The inner sealing ring for the valve body is made of tetrafluoroethylene.
The outer sealing ring for the valve body is made of oil-resistant rubber materials.
By adopting the technical scheme, compared with the prior art, the invention has the following advantages:
1. When high-pressure oil enters from the second oil port and enters the left cavity through the control oil channel, the high-pressure oil acts on the left end face of the valve core to push the valve core to move rightwards, the spring is compressed, the valve port is opened (the second oil port is communicated with the first oil port), the high-pressure oil flows from the second oil port to the first oil port, and the valve core is not easy to misplace due to the spool structure, so that the valve core moves quickly and stably due to acting force acting on the left end face of the valve core.
2. When the second oil port is in low-pressure oil return, the spring pushes the valve core to move left for resetting, and meanwhile, the valve core can also be limited; the valve port is closed, the second oil port and the first oil port are cut off, the oil flow at the upper part of the first oil port is prevented from being empty, the movement position of the valve core is accurate, the working stability of the high-pressure slide valve type one-way valve is ensured, and meanwhile, the hydraulic oil flow inside the related executive component is avoided.
3. The left end face of the right cylinder of the valve core is provided with a conical surface, the cone angle of the conical surface is 30-35 degrees, and the bus length is 3-5 mm, so that the impact of high-pressure oil is relieved. In the closed state, the distance between the intersection line of the conical surface and the cylindrical surface of the right cylinder and the left side surface of the second sealing ring is 0.5-1 mm, and the fit clearance between the valve body and the valve core is 5-10 mu m, so that the clearance sealing function is realized, the hydraulic oil leakage quantity caused by the fit clearance is reduced, and the sealing performance of the high-pressure slide valve type one-way valve is good.
4. A third sealing groove is arranged in the middle of the left cylinder of the valve core, and is provided with a third combined sealing ring; a first sealing groove is arranged at a position 5-10 mm away from the right end face of the right cylinder, and is provided with a first combined sealing ring. The leakage of hydraulic oil is effectively reduced, and the sealing performance of the high-pressure slide valve type one-way valve is good.
The first combined sealing ring and the third combined sealing ring are composed of an inner sealing ring 31 for a valve core and an outer sealing ring 32 for the valve core, the cross section of the outer sealing ring 32 for the valve core is a rectangular surface, the width is 5-6 mm, the height is 2-3 mm, and the material is tetrafluoroethylene; the cross section of the inner sealing ring 31 for the valve core is in an I shape, the width is 5-6 mm, the height is 3-5 mm, the two sides are symmetrical circular arcs, the width of the middle part is 3-4 mm, and the inner sealing ring is made of oil-resistant rubber materials.
The second combined sealing ring consists of an inner sealing ring for the valve body and an outer sealing ring for the valve body, the cross section shape of the inner sealing ring for the valve body is the same as that of the outer sealing ring for the valve core, and the material is tetrafluoroethylene; the cross section shape of the outer sealing ring for the valve body is the same as that of the inner sealing ring for the valve core, and the material is oil-resistant rubber material. The leakage of hydraulic oil is obviously reduced, the sealing performance is effectively improved, the sealing effect of the high-pressure slide valve type one-way valve is achieved through the sealing of the combined sealing ring and the annular clearance fit sealing, and the sealing performance is good.
5. The center of right valve gap is equipped with the blind hole, and the blind hole is the spring holder, and the central point of blind hole puts and is equipped with the oil port of revealing, and in the case right movable process, the inside oil that leaks of right side chamber is discharged through the oil port of revealing, has avoided revealing oil and has formed the backpressure in the right side intracavity for the movable process of case is quick and steady.
6. In the process of moving the valve core leftwards, the hydraulic oil in the left cavity flows back to the oil tank through the control oil channel, the hydraulic oil in the left cavity plays a role in buffering, the mechanical impact between the left end face of the left cylinder of the valve core and the left circular boss of the left valve cover is avoided, the valve core moves stably, the hydraulic impact is avoided, and the service life of the high-pressure slide valve type one-way valve is prolonged.
Therefore, the invention has the characteristics of no hydraulic and mechanical impact, good sealing performance, good stability and long service life.
Drawings
FIG. 1 is a schematic diagram of a structure of the present invention;
fig. 2 is a schematic view of a structure of the valve body 3 in fig. 1;
FIG. 3 is a schematic view of a structure of the valve core 4 in FIG. 1;
Fig. 4 is a schematic structural view of the left valve cover 1 in fig. 1;
fig. 5 is a schematic structural view of the right valve cover 8 in fig. 1;
FIG. 6 is a schematic view of the third combined seal ring 14 in FIG. 1;
fig. 7 is a schematic structural diagram of the second combined sealing ring 13 in fig. 1.
Detailed Description
The invention is further described below in connection with the drawings and the detailed description, without limiting the scope thereof.
In this embodiment:
The valve body 3 and the valve core 4 are made of 45 # steel.
The taper angle of the conical surface 26 is 30-35 degrees, and the bus length is 3-5 mm.
The diameter of the left circular boss is 0.35-0.5 times of the diameter of the valve core 4.
The material of the inner sealing ring 31 for the valve core is oil-resistant rubber material.
The valve element outer seal ring 32 is made of tetrafluoroethylene.
The valve body inner seal 33 is made of tetrafluoroethylene.
The outer seal ring 34 for the valve body is made of oil-resistant rubber material.
The embodiments are not described in detail.
Example 1
A high pressure spool valve type one-way valve. As shown in fig. 1, the high-pressure spool-type check valve includes a valve body 3, a spool 4, a spring 6, a left valve cover 1, and a right valve cover 8. The left valve cover 1 and the right valve cover 8 are arranged at the left end and the right end corresponding to the valve body 3 through bolts 16, the valve body 3 is internally provided with a valve core 4 and a spring 6, one end of the spring 6 is contacted with the right valve cover 8, and the other end of the spring 6 is contacted with the right end of the valve core 4; the right cylindrical surface of the valve core 4 is provided with a first combined sealing ring 11, the middle part of the inner wall of the valve body 3 is provided with a second combined sealing ring 13 near the right part, and the left cylindrical surface of the valve core 4 is provided with a third combined sealing ring 14; the left end face and the right end face of the valve body 3 are correspondingly provided with a left sealing ring 2 and a right sealing ring 7.
As shown in fig. 2, the valve body 3 is tubular, a first oil port 5 is opened near the right side of the middle part of the valve body 3, a second oil port 12 is opened on the right side of the first oil port 5, the opening of the first oil port 5 faces upwards, the opening of the second oil port 12 faces downwards, the center line of the first oil port 5 and the center line of the second oil port 12 are positioned on the same section, and the distance l1=23-30 mm between the extension line of the center line of the first oil port 5 and the extension line of the center line of the second oil port 12. A first undercut groove 20 and a second undercut groove 18 are formed in the inner wall of the valve body 3, the groove width center line of the first undercut groove 20 and the center line of the first oil port 5 are positioned in the same section, and the groove width center line of the second undercut groove 18 and the center line of the second oil port 12 are positioned in the same section; a second sealing groove 19 is formed in the inner wall of the valve body 3, the second sealing groove 19 is positioned at the middle position of the first undercut groove 20 and the second undercut groove 18, and the second sealing groove 19 is provided with a second combined sealing ring 13; the two side surfaces of the second undercut groove 18 are symmetrical annular inclined planes, and the included angle between the annular inclined planes and the inner wall is 40-43 degrees.
As shown in fig. 2, a control oil channel 15 is arranged on the shell of the valve body 3 along the axis, an oil outlet of the control oil channel 15 is communicated with a left cavity 17 of the valve body 3, an oil inlet of the control oil channel 15 is communicated with the second oil port 12, and the distance between the oil outlet of the control oil channel 15 and the left end face of the valve body 3 is l2=20-23 mm; the left end face and the right end face of the valve body 3 are correspondingly provided with a left sealing groove 21 and a right sealing groove 22, and the left sealing groove 21 and the right sealing groove 22 are correspondingly provided with a left sealing ring 2 and a right sealing ring 7.
As shown in fig. 3, the valve core 4 is formed by integrating a core bar 27 with a left cylinder 28 at the left end of the core bar 27 and a right cylinder 25 at the right end of the core bar 27. The middle part of the left cylinder 28 is provided with a third sealing groove 29, and the third sealing groove 29 is provided with a third combined sealing ring 14; a first seal groove 24 is arranged at a position 5-10 mm away from the right end face of the right cylinder 25, and the first seal groove 24 is provided with a first combined seal ring 11; the third seal groove 29 is identical to the first seal groove 24, and the first combined seal ring 11 is identical to the third combined seal ring 14. The right end face of the right cylinder 25 is coaxially provided with a right circular boss 23, the right circular boss 23 is a mandrel of the spring 6, the diameter of the right circular boss 23 is the same as the inner diameter of the spring 6, and a conical surface 26 is arranged between the left end face and the cylindrical surface of the right cylinder 25.
As shown in fig. 1, the diameter of the left cylinder 28 and the right cylinder 25 of the valve element 4 and the gap between the inner wall of the valve body 3 are 5-8 μm.
As shown in fig. 1,2 and 4, a left circular boss is coaxially arranged on the inner side of the left valve cover 1, the height L3 of the left circular boss is equal to the distance L2 between the oil outlet of the control oil channel 15 and the left end face of the valve body 3, and screw holes are uniformly formed on the left valve cover 1.
As shown in fig. 1 and 5, a blind hole 30 is arranged in the center of the right valve cover 8, the blind hole 30 is a spring seat, a leakage oil port 9 is arranged in the center of the blind hole 30, and screw holes are uniformly formed in the right valve cover 8.
As shown in FIG. 1, the free length of the spring 6 is 45 to 70mm, and the compression amount is 22 to 35mm.
As shown in fig. 1, in the closed state of embodiment 1, the distance between the intersection line of the conical surface 26 and the cylindrical surface of the right cylinder 25 and the left surface of the second seal ring 13 is 0.5 to 1mm.
As shown in fig. 6, the third combined seal ring 14 is composed of an inner seal ring 31 for the spool and an outer seal ring 32 for the spool. The cross section of the valve core outer seal ring 32 is rectangular; the cross section of the inner sealing ring 31 for the valve core is in an I shape, two sides of the cross section of the inner sealing ring 31 for the valve core are symmetrical circular arcs, and the width of the middle part of the inner sealing ring 31 for the valve core is 3-4 mm; the width of the inner seal ring 31 for the valve core and the width of the outer seal ring 32 for the valve core are the same as the nominal width of the third seal groove 29, and the width is 5-6 mm; the height of the inner seal ring 31 for the valve core is 3-5 mm, the height of the outer seal ring 32 for the valve core is 2-3 mm, and the sum of the height of the inner seal ring 31 for the valve core and the height of the outer seal ring 32 for the valve core is the same as the nominal size of the height of the third seal groove 29.
As shown in fig. 7, the second combined seal ring 13 is composed of an inner seal ring 33 for the valve body and an outer seal ring 34 for the valve body. The cross-sectional shape of the valve body inner seal ring 33 is the same as the cross-sectional shape of the valve body outer seal ring 32, and the cross-sectional shape of the valve body outer seal ring 34 is the same as the cross-sectional shape of the valve body inner seal ring 31.
Example 2
A high pressure spool valve type one-way valve. Example 1 was repeated except for the following technical parameters:
The distance between the extension line of the center line of the first oil port 5 and the extension line of the center line of the second oil port 12 is l1=30-40 mm.
The included angle between the annular inclined plane and the inner wall is 42-45 DEG
The distance between the oil outlet of the control oil channel 15 and the left end face of the valve body 3 is L2=22-25 mm;
the diameter of the left cylinder 28 and the right cylinder 25 of the valve core 4 and the gap between the inner wall of the valve body 3 are 7-10 mu m.
The free length of the spring 6 is 55-80 mm, and the compression amount is 30-40 mm.
Compared with the prior art, the specific embodiment has the following advantages:
1. when high-pressure oil enters from the second oil port 12 and passes through the control oil channel 15 to enter the left cavity 17, the high-pressure oil acts on the left end face of the valve core 4 to push the valve core 4 to move rightwards, the spring 6 is compressed, the valve port is opened (the second oil port 12 is communicated with the first oil port 5), the high-pressure oil flows from the second oil port 12 to the first oil port 5, and the valve core 4 is not easy to generate dislocation due to the spool structure, and the acting force acting on the left end face of the valve core 4 enables the valve core 4 to move quickly and stably.
2. When the second oil port 12 is in low-pressure oil return, the spring 6 pushes the valve core 4 to move left for resetting, and meanwhile, the limiting can be realized; the valve port is closed, the second oil port 12 and the first oil port 5 are cut off, the upper part of the first oil port 5 is prevented from being emptied, the movement position of the valve core 4 is accurate, the working stability of the high-pressure slide valve type one-way valve is ensured, and meanwhile, the hydraulic oil in the relevant executive component is prevented from being emptied.
3. The left end face of the right cylinder 25 of the valve core 4 in the specific embodiment is provided with a conical surface 26, the cone angle of the conical surface 26 is 30-35 degrees, and the bus length is 3-5 mm, so as to slow down the impact of high-pressure oil. In the closed state, the distance between the intersection line of the conical surface 26 and the cylindrical surface of the right cylinder 25 and the left side surface of the second sealing ring 13 is 0.5-1 mm, and the fit clearance between the valve body 3 and the valve core 4 is 5-10 mu m, so that the clearance sealing function is realized, the hydraulic oil leakage quantity caused by the fit clearance is reduced, and the sealing performance of the high-pressure slide valve type one-way valve is good.
4. A third sealing groove 29 is arranged in the middle of the left cylinder 28 of the valve core 4, and a third combined sealing ring 14 is arranged on the third sealing groove 29; a first seal groove 24 is arranged at a position 5-10 mm away from the right end face of the right cylinder 25, and the first seal groove 24 is provided with a first combined seal ring 11. The leakage of hydraulic oil is effectively reduced, and the sealing performance of the high-pressure slide valve type one-way valve is good.
The first combined sealing ring 11 and the third combined sealing ring 14 are composed of an inner sealing ring 31 for a valve core and an outer sealing ring 32 for the valve core, the cross section of the outer sealing ring 32 for the valve core is a rectangular surface, the width is 5-6 mm, the height is 2-3 mm, and the material is tetrafluoroethylene; the cross section of the inner sealing ring 31 for the valve core is in an I shape, the width is 5-6 mm, the height is 3-5 mm, the two sides are symmetrical circular arcs, the width of the middle part is 3-4 mm, and the inner sealing ring is made of oil-resistant rubber materials.
The second combined sealing ring 13 consists of an inner sealing ring 33 for a valve body and an outer sealing ring 34 for the valve body, wherein the cross section shape of the inner sealing ring 33 for the valve body is the same as that of the outer sealing ring 32 for a valve core, and the material is tetrafluoroethylene; the cross-sectional shape of the outer seal ring 34 for the valve body is the same as that of the inner seal ring 31 for the valve core, and the material is oil-resistant rubber material. The leakage of hydraulic oil is obviously reduced, the sealing performance is effectively improved, the sealing effect of the high-pressure slide valve type one-way valve is achieved through the sealing of the combined sealing ring and the annular clearance fit sealing, and the sealing performance is good.
5. The center of right valve gap 8 is equipped with blind hole 30, and blind hole 30 is the spring holder, and the central point of blind hole 30 puts and is equipped with and reveal hydraulic fluid port 9, and when case 4 moves the in-process to the right, the inside oil that leaks of right side chamber 10 is discharged through revealing hydraulic fluid port 9, has avoided revealing oil and has formed the backpressure in right side intracavity 10 for the removal process of case 4 is quick and steady.
6. In the process of moving the valve core 4 leftwards, hydraulic oil in the left cavity 17 flows back to the oil tank through the control oil channel 15, the hydraulic oil in the left cavity 17 plays a role in buffering, mechanical impact between the left end face of the left cylinder 28 of the valve core 4 and a left circular boss of the left valve cover 1 is avoided, the valve core 4 moves stably, hydraulic impact is avoided, and the service life of the high-pressure slide valve type one-way valve is prolonged.
Therefore, the concrete implementation mode has the characteristics of no hydraulic and mechanical impact, good sealing performance, good stability and long service life.

Claims (7)

1. The high-pressure slide valve type one-way valve is characterized by comprising a valve body (3), a valve core (4), a spring (6), a left valve cover (1) and a right valve cover (8); the left valve cover (1) and the right valve cover (8) are arranged at the left end and the right end corresponding to the valve body (3) through bolts (16), the valve body (3) is internally provided with a valve core (4) and a spring (6), one end of the spring (6) is contacted with the right valve cover (8), and the other end of the spring (6) is contacted with the right end of the valve core (4); the right cylindrical surface of the valve core (4) is provided with a first combined sealing ring (11), the middle part of the inner wall of the valve body (3) is provided with a second combined sealing ring (13) near the right part, and the left cylindrical surface of the valve core (4) is provided with a third combined sealing ring (14); a left sealing ring (2) and a right sealing ring (7) are correspondingly arranged on the left end face and the right end face of the valve body (3);
The valve body (3) is tubular, a first oil port (5) is formed in the middle of the valve body (3) close to the right, a second oil port (12) is formed in the right side of the first oil port (5), the opening of the first oil port (5) faces upwards, the opening of the second oil port (12) faces downwards, the center line of the first oil port (5) and the center line of the second oil port (12) are located in the same section, and the distance L1=23-40 mm between the center line of the first oil port (5) and the center line of the second oil port (12); a first countersink groove (20) and a second countersink groove (18) are formed in the inner wall of the valve body (3), the groove width center line of the first countersink groove (20) and the center line of the first oil port (5) are positioned in the same section, and the groove width center line of the second countersink groove (18) and the center line of the second oil port (12) are positioned in the same section; a second sealing groove (19) is formed in the inner wall of the valve body (3), the second sealing groove (19) is positioned at the middle position of the first countersink groove (20) and the second countersink groove (18), and the second sealing groove (19) is provided with a second combined sealing ring (13); the two side surfaces of the second undercut groove (18) are symmetrical annular inclined planes, and the included angle between the annular inclined planes and the inner wall is 40-45 degrees;
A control oil channel (15) is arranged on the shell of the valve body (3) along the axis, an oil outlet of the control oil channel (15) is communicated with a left cavity (17) of the valve body (3), an oil inlet of the control oil channel (15) is communicated with a second oil port (12), and the distance L2=20-25 mm between the oil outlet of the control oil channel (15) and the left end face of the valve body (3); a left sealing groove (21) and a right sealing groove (22) are correspondingly formed on the left end face and the right end face of the valve body (3), and a left sealing ring (2) and a right sealing ring (7) are correspondingly arranged on the left sealing groove (21) and the right sealing groove (22);
The valve core (4) is an integral body formed by a core bar (27), a left cylinder (28) at the left end of the core bar (27) and a right cylinder (25) at the right end, a third sealing groove (29) is arranged in the middle of the left cylinder (28), and the third sealing groove (29) is provided with a third combined sealing ring (14); a first sealing groove (24) is arranged at a position 5-10 mm away from the right end face of the right cylinder (25), and the first sealing groove (24) is provided with a first combined sealing ring (11); the third sealing groove (29) is the same as the first sealing groove (24), and the first combined sealing ring (11) is the same as the third combined sealing ring (14); the right end face of the right cylinder (25) is coaxially provided with a right circular boss (23), the right circular boss (23) is a mandrel of the spring (6), the diameter of the right circular boss (23) is the same as the inner diameter of the spring (6), and a conical surface (26) is arranged between the left end face and the cylindrical surface of the right cylinder (25);
The diameter of the left cylinder (28) and the diameter of the right cylinder (25) of the valve core (4) are 5-10 mu m with the gap between the inner wall of the valve body (3);
the inner side of the left valve cover (1) is coaxially provided with a left circular boss, and the height L3 of the left circular boss is equal to the distance L2 between an oil outlet of the control oil channel (15) and the left end face of the valve body (3);
The center of the right valve cover (8) is provided with a blind hole (30), the blind hole (30) is a spring seat, and the center of the blind hole (30) is provided with a leakage oil port (9);
the free length of the spring (6) is 45-80 mm, and the compression amount is 22-40 mm;
In the closed state, the distance between the intersection line of the conical surface (26) and the cylindrical surface of the right cylinder (25) and the left side surface of the second combined sealing ring (13) is 0.5-1 mm;
The third combined sealing ring (14) consists of an inner sealing ring (31) for the valve core and an outer sealing ring (32) for the valve core; the cross section of the valve core outer sealing ring (32) is rectangular, the cross section of the valve core inner sealing ring (31) is I-shaped, two sides of the cross section of the valve core inner sealing ring (31) are symmetrical circular arcs, and the width of the middle part of the valve core inner sealing ring (31) is 3-4 mm; the width of the inner sealing ring (31) for the valve core and the width of the outer sealing ring (32) for the valve core are the same as the nominal width of the third sealing groove (29), and the width is 5-6 mm; the height of the inner sealing ring (31) for the valve core is 3-5 mm, the height of the outer sealing ring (32) for the valve core is 2-3 mm, and the sum of the height of the inner sealing ring (31) for the valve core and the height of the outer sealing ring (32) for the valve core is the same as the nominal size of the height of the third sealing groove (29);
The second combined sealing ring (13) consists of an inner sealing ring (33) for the valve body and an outer sealing ring (34) for the valve body; the cross-sectional shape of the inner seal ring (33) for the valve body is the same as the cross-sectional shape of the outer seal ring (32) for the valve core, and the cross-sectional shape of the outer seal ring (34) for the valve body is the same as the cross-sectional shape of the inner seal ring (31) for the valve core;
The outer sealing ring (34) for the valve body is made of oil-resistant rubber materials.
2. The high-pressure slide valve type one-way valve according to claim 1, characterized in that the valve body (3) and the valve core (4) are made of 45 # steel.
3. The high-pressure spool-type check valve according to claim 1, characterized in that the taper angle of the conical surface (26) is 30-35 °, and the bus bar length is 3-5 mm.
4. The high-pressure slide valve type one-way valve according to claim 1, wherein the diameter of the left circular boss is 0.35-0.5 times of the diameter of the valve core (4).
5. The high-pressure spool valve type check valve according to claim 1, wherein the material of the inner seal ring (31) for the spool is an oil-resistant rubber material.
6. The high-pressure spool-type check valve according to claim 1, wherein the valve element outer seal ring (32) is made of tetrafluoroethylene.
7. The high-pressure spool-type check valve according to claim 1, wherein the inner seal ring (33) for the valve body is made of tetrafluoroethylene.
CN202010024915.1A 2020-01-10 2020-01-10 High-pressure slide valve type one-way valve Active CN111237275B (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4848390A (en) * 1987-09-07 1989-07-18 Heilmeier & Weinlein Fabrik Fur Oel-Hydraulik Gmbh & Co. Kg Switching valve having hydraulic self-holding properties
EP0488529A1 (en) * 1990-11-26 1992-06-03 Westinghouse Brake And Signal Holdings Limited Valve arrangements
CN1802528A (en) * 2003-06-04 2006-07-12 伊顿流体动力有限公司 Pressure-dependent check valve and hydraulic system equipped therewith
CN201615104U (en) * 2010-03-09 2010-10-27 绿友机械集团股份有限公司 Three-position four-way solenoid directional valve
CN202182082U (en) * 2011-08-23 2012-04-04 苏州新和机械有限公司 Return oil check valve for oil cylinder used in die-casting of slide block
JP2017110678A (en) * 2015-12-14 2017-06-22 株式会社キッツ High-pressure check valve and hydrogen station using this valve
CN107429851A (en) * 2015-04-15 2017-12-01 Ｋｙｂ株式会社 Valve gear and fluid pressure control device
CN108895052A (en) * 2018-09-17 2018-11-27 宁波真格液压科技有限公司 A kind of plug-in automatic stop valve
CN211852333U (en) * 2020-01-10 2020-11-03 武汉科技大学 Internal control slide valve type high-pressure one-way valve

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4848390A (en) * 1987-09-07 1989-07-18 Heilmeier & Weinlein Fabrik Fur Oel-Hydraulik Gmbh & Co. Kg Switching valve having hydraulic self-holding properties
EP0488529A1 (en) * 1990-11-26 1992-06-03 Westinghouse Brake And Signal Holdings Limited Valve arrangements
CN1802528A (en) * 2003-06-04 2006-07-12 伊顿流体动力有限公司 Pressure-dependent check valve and hydraulic system equipped therewith
CN201615104U (en) * 2010-03-09 2010-10-27 绿友机械集团股份有限公司 Three-position four-way solenoid directional valve
CN202182082U (en) * 2011-08-23 2012-04-04 苏州新和机械有限公司 Return oil check valve for oil cylinder used in die-casting of slide block
CN107429851A (en) * 2015-04-15 2017-12-01 Ｋｙｂ株式会社 Valve gear and fluid pressure control device
JP2017110678A (en) * 2015-12-14 2017-06-22 株式会社キッツ High-pressure check valve and hydrogen station using this valve
CN108895052A (en) * 2018-09-17 2018-11-27 宁波真格液压科技有限公司 A kind of plug-in automatic stop valve
CN211852333U (en) * 2020-01-10 2020-11-03 武汉科技大学 Internal control slide valve type high-pressure one-way valve

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