CN211852333U - Internal control slide valve type high-pressure one-way valve - Google Patents
Internal control slide valve type high-pressure one-way valve Download PDFInfo
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- CN211852333U CN211852333U CN202020047307.8U CN202020047307U CN211852333U CN 211852333 U CN211852333 U CN 211852333U CN 202020047307 U CN202020047307 U CN 202020047307U CN 211852333 U CN211852333 U CN 211852333U
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Abstract
The utility model relates to an interior accuse sliding valve type high pressure check valve. The technical scheme is as follows: the internal control slide valve type high-pressure 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 installed at the corresponding left end and right end of the valve body (3) through bolts (16), a valve core (4) and a spring (6) are installed in the valve body (3), one end of the spring (6) is in contact with the right valve cover (8), and the other end of the spring (6) is in contact with the right end of the valve core (4); a first combined sealing ring (11) is arranged on the right cylindrical surface of the valve core (4), a second combined sealing ring (13) is arranged close to the right in the middle of the inner wall of the valve body (3), and a third combined sealing ring (14) is arranged on the left cylindrical surface of the valve core (4); the left end surface and the right end surface of the valve body (3) are correspondingly provided with a left sealing ring (2) and a right sealing ring (7). The utility model has the characteristics of no hydraulic pressure and mechanical impact, the leakproofness is good, stability is good and longe-lived.
Description
Technical Field
The utility model belongs to the technical field of the one-way hydrovalve. In particular to an internal control slide valve type high-pressure one-way valve.
Background
At present, adopt the check valve comparatively commonly in hydraulic system, its case structure is mostly toper or spherical, and current check valve case is mostly line contact with disk seat joint department, appears the case dislocation easily to because the switching is frequent and the oscillation, wear and tear easily in joint department, produce the trace ditch, influence sealing performance, make check valve work unstable, reduce life. 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, vibration and noise are increased for the hydraulic system, and the working performance of the hydraulic system is influenced. 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 complicated.
From the current research situation, many scholars utilize software such as fluent to carry out fluid simulation on the check valve, improve the structure to a certain extent, effectively solve the defects of high noise, easy blocking, poor opening rapidity and the like, and most of valve core structures of the scholars are still spherical or conical. "a pilot operated check valve (CN 209725330)" discloses a pilot operated check valve with improved structure, which improves the contact performance of a spherical surface and a through hole, but the sealing performance is still to be improved; "ultrahigh pressure pilot operated check valve (CN 209469836U)" discloses a check valve working under ultrahigh pressure condition, which is provided with a piston driven by liquid and capable of assisting the movement of a ball core; "a high-pressure check valve (CN209761891U) of electro-magnet control" discloses a check valve controlled by electro-magnet, has improved the automatic control level of check valve, and have not influenced by oil return back pressure, response speed is fast and do not need the characteristics of control oil circuit. However, in the above technology, the valve core is in a spherical or conical surface structure, and the joint of the valve core and the valve seat is still in line contact, so that the abrasion of the contact surface is easily caused under the mechanical impact and the hydraulic impact, the sealing performance is deteriorated, and the service life is shortened.
Disclosure of Invention
The utility model aims at overcoming above-mentioned defect, the purpose provides one kind can realize not having hydraulic pressure and mechanical shock, the leakproofness is good, stability is good and longe-lived high-pressure check valve of interior accuse slide valve type.
In order to realize the purpose, the utility model discloses a technical scheme is:
the internal control slide valve type high-pressure 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 installed at the corresponding left end and right end of the valve body through bolts, a valve core and a spring are installed in the valve body, one end of the spring is in contact with the right valve cover, and the other end of the spring is in contact with the right end of the valve core; a first combined sealing ring is arranged on the right cylindrical surface of the valve core, a second combined sealing ring is arranged close to the right in the middle of the inner wall of the valve body, and a third combined sealing ring is arranged on the left cylindrical surface of the valve core; 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, a first oil port is formed in the middle of the valve body close to the right, a second oil port is formed in the right side of the first 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 located on the same cross section, and the distance L1 between the center line of the first oil port and the center line of the second oil port is 23-40 mm. The inner wall of the valve body is provided with a first sinking and cutting groove and a second sinking and cutting groove, the groove width center line of the first sinking and cutting groove and the first oil port center line are positioned on the same cross section, and the groove width center line of the second sinking and cutting groove and the second oil port center line are positioned on the same cross section; a second sealing groove is formed in the inner wall of the valve body and is positioned in the middle of the first undercut groove and the second undercut groove, and a second combined sealing ring is installed in the second sealing groove; two sides 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 the left cavity of the valve body, an oil inlet of the control oil channel is communicated with the second oil port, and the distance L2 between the oil outlet of the control oil channel and the left end face of the valve body is 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 a left sealing ring and a right sealing ring are correspondingly arranged in the left sealing groove and the right sealing groove.
The valve core is a whole formed by the core rod, a left cylinder at the left end of the core rod and a right cylinder at the right end of the core rod. A third sealing groove is formed in the middle of the left cylinder, and a third combined sealing ring is arranged in the third sealing groove; a first sealing groove is arranged at a position 5-10 mm away from the right end face of the right cylinder, and a first combined sealing ring is arranged in the first sealing groove; the third sealing groove is the same as the first sealing groove, and the first combined sealing ring is the same as the third combined sealing ring. The right end face of the right cylinder is coaxially and concentrically 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 and the cylindrical surface of the right cylinder.
The clearance between the diameters of the left cylinder and the right cylinder of the valve core and the inner wall of the valve body is 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 the left valve cover is uniformly provided with screw holes.
The center of the right valve cover is provided with a blind hole which is a spring seat, the center of the blind hole is provided with an oil leakage hole, and the right valve cover is uniformly provided with screw holes.
The free length of the spring is 45-80 mm, and the compression amount is 22-40 mm.
And 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 combined 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 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 in an I shape, 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 both made of No. 45 steel.
The taper angle of the conical surface is 30-35 degrees, and the length of the generatrix 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 an oil-resistant rubber material.
The outer sealing ring for the valve core is made of tetrafluoroethylene material.
The inner sealing ring for the valve body is made of tetrafluoroethylene material.
The outer sealing ring for the valve body is made of an oil-resistant rubber material.
Due to the adoption of the technical scheme, compared with the prior art, the utility model have the following advantage:
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 of a slide valve structure and is not prone to dislocation, so that the valve core can move quickly and stably under the action of the action 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 leftwards to reset, 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, oil on the upper portion of the first oil port is prevented from flowing out, the movement position of the valve core is accurate, the working stability of the internal control slide valve type high-pressure one-way valve is guaranteed, and meanwhile hydraulic oil inside related execution elements is prevented from flowing out.
3. The utility model discloses a processing of the right cylinder left end face of case has the conical surface, and the cone angle of conical surface is 30 ~ 35, and the bus length is 3 ~ 5mm to slow down the impact of high-pressure oil. In a 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 combined sealing ring is 0.5-1 mm, the fit clearance between the valve body and the valve core is 5-10 micrometers, a clearance sealing effect is achieved, the leakage amount of hydraulic oil caused by the fit clearance is reduced, and the sealing performance of the internal control slide valve type high-pressure one-way valve is good.
4. A third sealing groove is formed in the middle of the left cylinder of the valve core, and a third combined sealing ring is mounted in the third sealing groove; be equipped with first seal groove 5 ~ 10mm department apart from the right-hand member face of right side cylinder, first combination sealing washer is installed to first seal groove. The leakage of hydraulic oil is effectively reduced, and the sealing performance of the internal control slide valve type high-pressure one-way valve is good.
The first combined sealing ring and the third combined sealing ring are both composed of an inner sealing ring 31 for the valve core and an outer sealing ring 32 for the valve core, the 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 material; the section of the inner sealing ring 31 for the valve element is in an I shape, the width is 5-6 mm, the height is 3-5 mm, the two sides are symmetrical arcs, the width of the middle part is 3-4 mm, and the inner sealing ring is made of an oil-resistant rubber material.
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 material; 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, and the material is oil-resistant rubber material. The hydraulic oil leakage is obviously reduced, the sealing performance is effectively improved, the sealing effect of the internal control slide valve type high-pressure 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 lid 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 leakage mouth, moves the in-process right when the case, and the oil leakage of right intracavity portion is discharged through leaking the oil leakage mouth, has avoided leaking the oil and has formed the backpressure in right intracavity for the removal process of case is quick and steady.
6. In the process of leftward movement of the valve core, 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, 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, hydraulic impact is avoided, and the service life of the internal control slide valve type high-pressure one-way valve is prolonged.
Therefore, the utility model has the characteristics of no hydraulic pressure and mechanical shock, the leakproofness is good, stability is good and longe-lived.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the valve body 3 in FIG. 1;
FIG. 3 is a schematic view of a valve cartridge 4 of 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 structural view of the third composite sealing 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 will be further described with reference to the drawings and the detailed description, without limiting the scope of the invention.
In this embodiment:
the valve body 3 and the valve core 4 are both made of No. 45 steel.
The taper angle of the conical surface 26 is 30-35 degrees, and the length of a bus 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 inner sealing ring 31 for the valve core is made of oil-resistant rubber material.
The outer sealing ring 32 for the valve core is made of tetrafluoroethylene material.
The inner sealing ring 33 for the valve body is made of tetrafluoroethylene material.
The outer sealing ring 34 for the valve body is made of oil-resistant rubber.
The detailed description is omitted in the embodiments.
Example 1
An internal control slide valve type high-pressure one-way valve. As shown in fig. 1, the internal control spool type high pressure check valve includes 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 installed at the corresponding left end and right end of the valve body 3 through bolts 16, a valve core 4 and a spring 6 are installed in the valve body 3, one end of the spring 6 is in contact with the right valve cover 8, and the other end of the spring 6 is in contact with the right end of the valve core 4; a first combined sealing ring 11 is arranged on the right cylindrical surface of the valve core 4, a second combined sealing ring 13 is arranged close to the right in the middle of the inner wall of the valve body 3, and a third combined sealing ring 14 is arranged on the left cylindrical surface of the valve core 4; the left end surface and the right end surface 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 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 upward, the opening of the second oil port 12 faces downward, the center line of the first oil port 5 and the center line of the second oil port 12 are located on the same cross section, and the distance L1 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 23-30 mm. 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 located on the same cross section, and the groove width center line of the second undercut groove 18 and the center line of the second oil port 12 are located on the same cross section; a second sealing groove 19 is formed in the inner wall of the valve body 3, the second sealing groove 19 is located in the middle 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; two side surfaces of the second undercut groove 18 are symmetrical annular inclined surfaces, and an included angle between each annular inclined surface and the inner wall is 40-43 degrees.
As shown in fig. 2, a control oil passage 15 is arranged in the housing of the valve body 3 along the axial line, an oil outlet of the control oil passage 15 is communicated with a left cavity 17 of the valve body 3, an oil inlet of the control oil passage 15 is communicated with the second oil port 12, and a distance L2 between the oil outlet of the control oil passage 15 and the left end surface of the valve body 3 is 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 an integral body of the core rod 27, the left cylinder 28 at the left end of the core rod 27, and the right cylinder 25 at the right end of the core rod 27. A third sealing groove 29 is formed in the middle of the left cylinder 28, and a third combined sealing ring 14 is arranged in the third sealing groove 29; a first sealing groove 24 is formed in the position 5-10 mm away from the right end face of the right cylinder 25, and a first combined sealing ring 11 is installed in the first sealing groove 24; the third seal groove 29 is the same as the first seal groove 24, and the first combined seal ring 11 is the same as the third combined seal ring 14. The right end face of the right cylinder 25 is coaxially and concentrically 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 clearance between the diameter of the left cylinder 28 and the diameter of the right cylinder 25 of the valve core 4 and the inner wall of the valve body 3 is 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 arranged on the left valve cover 1.
As shown in fig. 1 and 5, a blind hole 30 is formed in the center of the right bonnet 8, the blind hole 30 is a spring seat, an oil leakage port 9 is formed in the center of the blind hole 30, and threaded holes are uniformly formed in the right bonnet 8.
As shown in FIG. 1, the spring 6 has a free length of 45 to 70mm and a compression amount of 22 to 35 mm.
As shown in fig. 1, in the closed state of this 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 side surface of the second combined seal ring 13 is 0.5 to 1 mm.
As shown in fig. 6, the third combination seal ring 14 is composed of a spool inner seal ring 31 and a spool outer seal ring 32. The section of the outer sealing ring 32 for the valve core is rectangular; the section of the inner sealing ring 31 for the valve core is in an I shape, two sides of the 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 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.
As shown in fig. 7, the second combined seal ring 13 is composed of an inner seal ring 33 for a valve body and an outer seal ring 34 for a 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
An internal control slide valve type high-pressure one-way valve. The procedure is as in example 1, except for the following parameters:
and the distance L1 between the extension line of the central line of the first oil port 5 and the extension line of the central line of the second oil port 12 is 30-40 mm.
The included angle between the annular inclined plane and the inner wall is 42-45 DEG
The distance L2 between the oil outlet of the control oil channel 15 and the left end face of the valve body 3 is 22-25 mm;
the clearance between the diameters of the left cylinder 28 and the right cylinder 25 of the valve core 4 and the inner wall of the valve body 3 is 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 implementation mode has the following advantages:
1. when high-pressure oil enters from the second oil port 12 and enters the left cavity 17 through the control oil channel 15, the high-pressure oil acts on the left end face of the valve core 4 to push the valve core 4 to move to the right, 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 of a slide valve structure and is not prone to dislocation, so that the valve core 4 can move quickly and stably under the action of the action force acting on the left end face of the valve core 4.
2. When the second oil port 12 is in low-pressure oil return, the spring 6 pushes the valve core 4 to move leftwards to reset, and meanwhile, the position can be limited; the valve port is closed, the second oil port 12 and the first oil port 5 are cut off, oil on the upper portion of the first oil port 5 is prevented from flowing empty, the movement position of the valve core 4 is accurate, the working stability of the internal control slide valve type high-pressure one-way valve is guaranteed, and meanwhile hydraulic oil inside related execution elements is prevented from flowing empty.
3. The left end face of a right cylinder 25 of the valve core 4 of the embodiment is processed with a conical surface 26, the cone angle of the conical surface 26 is 30-35 degrees, and the length of a bus is 3-5 mm, so that the impact of high-pressure oil is relieved. In a closed state, the distance between the intersection line of the cylindrical surfaces of the conical surface 26 and the right cylinder 25 and the left side surface of the second combined sealing ring 13 is 0.5-1 mm, the fit clearance between the valve body 3 and the valve core 4 is 5-10 micrometers, a clearance sealing effect is achieved, the hydraulic oil leakage amount caused by the fit clearance is reduced, and the sealing performance of the internal control slide valve type high-pressure one-way valve is good.
4. A third seal groove 29 is formed in the middle of the left cylinder 28 of the valve core 4, and a third combined seal ring 14 is mounted in the third seal groove 29; be equipped with first seal groove 24 at 5 ~ 10mm departments apart from the right end face of right cylinder 25, first combination sealing washer 11 is installed to first seal groove 24. The leakage of hydraulic oil is effectively reduced, and the sealing performance of the internal control slide valve type high-pressure one-way valve is good.
The first combined sealing ring 11 and the third combined sealing ring 14 are both composed of an inner sealing ring 31 for a valve core and an outer sealing ring 32 for the valve core, the 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 material; the section of the inner sealing ring 31 for the valve element is in an I shape, the width is 5-6 mm, the height is 3-5 mm, the two sides are symmetrical arcs, the width of the middle part is 3-4 mm, and the inner sealing ring is made of an oil-resistant rubber material.
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 section shape of the inner sealing ring 33 for the valve body is the same as that of the outer sealing ring 32 for the valve core, and the material is tetrafluoroethylene material; the cross-sectional shape of the valve body outer seal ring 34 is the same as the cross-sectional shape of the valve core inner seal ring 31, and the material is an oil-resistant rubber material. The hydraulic oil leakage is obviously reduced, the sealing performance is effectively improved, the sealing effect of the internal control slide valve type high-pressure 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 lid 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 the oil leak mouth 9, moves the in-process when case 4 right, and the inside leakage oil in right side chamber 10 is discharged through oil leak mouth 9, has avoided leaking the oil and has formed the backpressure in right side chamber 10 for the removal process of case 4 is quick and steady.
6. In the process of leftward movement of the valve core 4, the 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 surface of the left cylinder 28 of the valve core 4 and the left circular boss of the left valve cover 1 is avoided, the valve core 4 is stable in motion, hydraulic impact is avoided, and the service life of the internal control slide valve type high-pressure one-way valve is prolonged.
Therefore, the specific implementation mode has the characteristics of no hydraulic and mechanical impact, good sealing performance, good stability and long service life.
Claims (3)
1. An internal control slide valve type high-pressure 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 installed at the corresponding left end and right end of the valve body (3) through bolts (16), a valve core (4) and a spring (6) are installed in the valve body (3), one end of the spring (6) is in contact with the right valve cover (8), and the other end of the spring (6) is in contact with the right end of the valve core (4); a first combined sealing ring (11) is arranged on the right cylindrical surface of the valve core (4), a second combined sealing ring (13) is arranged close to the right in the middle of the inner wall of the valve body (3), and a third combined sealing ring (14) is arranged on the left cylindrical surface of the valve core (4); a left sealing ring (2) and a right sealing ring (7) are correspondingly arranged on the left end surface and the right end surface 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 on the same cross section, and the distance L1 between the center line of the first oil port (5) and the center line of the second oil port (12) is 23-40 mm; 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 located on the same cross section, and the groove width center line of the second undercut groove (18) and the center line of the second oil port (12) are located on the same cross section; a second sealing groove (19) is formed in the inner wall of the valve body (3), the second sealing groove (19) is located in the middle of the first undercut groove (20) and the second undercut groove (18), and a second combined sealing ring (13) is installed in the second sealing groove (19); two side surfaces of the second undercut groove (18) are symmetrical annular inclined surfaces, and an included angle between each annular inclined surface and the inner wall is 40-45 degrees;
a control oil channel (15) is arranged on a shell of the valve body (3) along an 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 a distance L2 between the oil outlet of the control oil channel (15) and the left end face of the valve body (3) is 20-25 mm; a left sealing groove (21) and a right sealing groove (22) are correspondingly formed in 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 in the left sealing groove (21) and the right sealing groove (22);
the valve core (4) is a whole body formed by a core rod (27), a left cylinder (28) at the left end of the core rod (27) and a right cylinder (25) at the right end of the core rod (27), a third sealing groove (29) is arranged in the middle of the left cylinder (28), and a third combined sealing ring (14) is arranged in the third sealing groove (29); 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 a first combined sealing ring (11) is arranged in the first sealing groove (24); 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); a right circular boss (23) is coaxially and concentrically arranged on the right end face of the right cylinder (25), 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 clearance between the diameters of the left cylinder (28) and the right cylinder (25) of the valve core (4) and the inner wall of the valve body (3) is 5-10 mu m;
a left circular boss is coaxially and concentrically arranged on the inner side of the left valve cover (1), 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);
a blind hole (30) is formed in the center of the right valve cover (8), the blind hole (30) is a spring seat, and an oil leakage opening (9) is formed in the center of the blind hole (30);
the free length of the spring (6) is 45-80 mm, and the compression amount is 22-40 mm;
in a 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 section of the outer sealing ring (32) for the valve core is rectangular, the section of the inner sealing ring (31) for the valve core is in an I shape, two sides of the section of the inner sealing ring (31) for the valve core are symmetrical 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 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 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).
2. The internally piloted slide valve type high pressure check valve as in claim 1, characterized in that said conical surface (26) has a cone angle of 30-35 ° and a generatrix length of 3-5 mm.
3. The internally piloted slide valve type high pressure check valve of claim 1, characterized in that the diameter of said left circular boss is 0.35 to 0.5 times the diameter of the spool (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020047307.8U CN211852333U (en) | 2020-01-10 | 2020-01-10 | Internal control slide valve type high-pressure one-way valve |
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| CN202020047307.8U CN211852333U (en) | 2020-01-10 | 2020-01-10 | Internal control slide valve type high-pressure one-way valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237275A (en) * | 2020-01-10 | 2020-06-05 | 武汉科技大学 | High-pressure slide valve type one-way valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237275A (en) * | 2020-01-10 | 2020-06-05 | 武汉科技大学 | High-pressure slide valve type one-way valve |
| CN111237275B (en) * | 2020-01-10 | 2024-05-17 | 武汉科技大学 | High-pressure slide valve type one-way valve |
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