CN210600323U - Direct-acting pressure control valve - Google Patents
Direct-acting pressure control valve Download PDFInfo
- Publication number
- CN210600323U CN210600323U CN201721879729.6U CN201721879729U CN210600323U CN 210600323 U CN210600323 U CN 210600323U CN 201721879729 U CN201721879729 U CN 201721879729U CN 210600323 U CN210600323 U CN 210600323U
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- Prior art keywords
- valve
- spring
- pressure control
- seat
- valve body
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- Expired - Fee Related
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- 238000007789 sealing Methods 0.000 claims description 27
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 31
- 230000001105 regulatory effect Effects 0.000 description 8
- 239000010720 hydraulic oil Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
A direct-acting pressure control valve is characterized in that a valve core is assembled at the lower part of a valve cavity in a valve body in a sliding manner; the valve cavity is also sequentially provided with a spring and a spring seat at the upper part of the valve core, and the upper end and the lower end of the spring respectively act on the spring seat and the valve core in an axial elastic manner; the lower end of the valve cavity is closed by a valve seat which is pressed on the inner side of the lower opening end of the valve body, and the center of the valve seat is provided with an oil inlet hole a; the lower end of the valve core is provided with a convex part matched with the oil inlet hole a; the middle part of the valve core is also provided with a guide ring, and the lower end surface of the guide ring is provided with an annular oil groove; the lower part of the valve body is provided with an oil discharge hole b; the locking nut is assembled at the upper end of the valve body, and a threaded hole of the locking nut is communicated with the valve cavity through a through hole which is arranged at the upper end of the valve body in a penetrating way; the adjusting screw penetrates through the locking nut and is in butt fit with the top end of the spring seat. The pressure control valve is simple in structure, small in size and suitable for being installed and used in narrow space, and meanwhile, the valve core of the pressure control valve has hydraulic power compensation function and can be high in opening/closing rate.
Description
Technical Field
The utility model relates to a pressure control valve, concretely relates to direct action type pressure control valve.
Background
In hydraulic systems, a pressure control valve is typically used to limit the maximum pressure of the system to protect the entire hydraulic system from exceeding a set pressure. At present, the valve body and the valve seat of the direct-acting pressure control valve mostly adopt a threaded connection structure, the connection mode not only makes the overall structure of the control valve more complex, but also makes the overall volume of the control valve larger, and therefore the direct-acting pressure control valve is not convenient to install and use in narrow and small positions of some installation spaces. In addition, the conventional valve core has no hydrodynamic force compensation function, and the opening/closing efficiency of the conventional pressure control valve is low due to the influence of the hydrodynamic force.
Disclosure of Invention
Problem to above-mentioned prior art exists, the utility model provides a direct action type pressure control valve, this pressure control valve simple structure, small can be applicable to the installation in narrow and small space and use, and simultaneously, its case has hydraulic power compensation work, and it is high to open/close the rate.
In order to achieve the above object, the present invention provides a direct-acting pressure control valve, which comprises a valve body, a valve core and an adjusting screw; the valve body is internally provided with a valve cavity in the axial direction, and the valve core is assembled at the lower part of the valve cavity in a sliding manner;
the valve cavity is also sequentially provided with a spring and a spring seat in the upper space of the valve core, and the upper end and the lower end of the spring respectively act on the spring seat and the valve core in an axial elastic manner; the lower end of the valve cavity is closed by a valve seat which is pressed on the inner side of the lower opening end of the valve body, and an oil inlet hole a is formed in the position, corresponding to the axial lead of the valve cavity, of the valve seat;
the lower end of the valve core is provided with a convex part which axially slides into or out of the oil inlet hole a so as to close or open the oil inlet hole a; the position of the valve core above the convex part is provided with a guide ring in sliding fit with the valve cavity, and the lower end surface of the guide ring is provided with an annular oil groove which is sunken upwards in a mode of surrounding the convex part;
an oil discharge hole b communicating the valve cavity with the outside of the valve body is radially formed in the position, close to the upper surface of the valve seat, of the lower part of the valve body;
the adjusting screw penetrates through a threaded hole in the upper end of the valve body in a threaded fit mode, the lower end of the adjusting screw extends into the valve cavity to be in butt fit with the top end of the spring seat, and a locking nut in threaded fit with the adjusting screw is sleeved on the portion, at the upper end of the valve body, of the adjusting screw.
The valve body and the valve seat are connected together in a riveting and pressing mode, so that the overall structure of the pressure control valve can be simplified, the overall size can be smaller, and the pressure control valve can adapt to the installation working condition of a narrow area. The lower surface of the guide ring on the valve core is provided with the annular oil groove, so that the valve core has a hydraulic compensation function, the valve core can offset the influence of hydraulic force by utilizing the recoil force of oil, and the opening/closing rate of the pressure control valve is good.
Furthermore, in order to facilitate assembly of the spring, the elasticity of the spring can be ensured to stably act on the spring seat and the valve core, the lower part of the spring seat is provided with an accommodating groove, the upper part of the valve core is provided with an annular boss, the upper end of the spring is assembled in the accommodating groove, and the lower end of the spring is sleeved outside the annular boss.
Furthermore, in order to ensure that the sealing performance of the pressure control valve is better and the sealing performance is more stable, an annular groove is arranged on the outer side of the upper part of the spring seat, and a second O-shaped sealing ring which is in sliding sealing fit with the valve cavity is assembled in the annular groove; and a first O-shaped sealing ring is assembled on the outer side of the lower part of the valve body. The traditional pressure control valve adopts an O-shaped ring and retaining ring type sealing structure in a high-pressure area in a sealing mode, and the O-shaped ring is easy to lose efficacy when high-pressure impact exists in the sealing structure, so that the pressure control valve can be caused to generate an oil leakage working condition, and the high-pressure resistance of the pressure control valve can be obviously deteriorated. The annular groove is formed in the outer side of the upper portion of the spring seat in sliding fit with the valve cavity, and the second O-shaped sealing ring is arranged in the annular groove, so that the high-pressure resistance of the pressure control valve in the face of high-pressure impact is better, and good sealing performance can be guaranteed when high-pressure impact exists.
Further, in order to enable the pressure control valve to bear higher pressure, the lower end face of the valve seat is of a planar structure. The lower end face of the valve seat is of a plane structure, so that when the pressure control valve is installed in the integrated block jack, the pressure control valve can be in contact fit with the plane at the bottom of the integrated block jack, a metal plane can be formed for sealing, hydraulic oil can be guaranteed not to leak through the gap between the valve seat and the plane at the bottom of the integrated block jack, and the pressure control valve can bear higher pressure. In addition, the lower end face of the valve seat is of a planar structure, and the valve seat can be processed conveniently.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. the oil valve comprises a valve body, 2, a spring seat, 3, a spring, 4, a valve core, 5, a valve seat, 6, a first O-shaped ring, 7, a second O-shaped ring, 8, a pressure regulating screw, 9, a locking nut, 10, a convex part, 11, an accommodating groove, 12, an annular boss, 13, an annular groove, 14, an annular oil groove, 15, a guide ring, 16, a counter bore, 17, oil inlet holes a and 18 and an oil outlet hole b.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, a direct-acting pressure control valve comprises a valve body 1, a valve core 4 and an adjusting screw 8; a valve cavity is arranged in the valve body 1 in the axial direction, and the valve core 4 is assembled at the lower part of the valve cavity in a sliding manner;
the valve cavity is also sequentially provided with a spring 3 and a spring seat 2 in the upper space of the valve core 4, and the upper end and the lower end of the spring 3 respectively act on the spring seat 2 and the valve core 4 in an axial elastic manner; the lower end of the valve cavity is sealed by a valve seat 5 which is pressed on the inner side of the lower opening end of the valve body 1, and an oil inlet hole a is formed in the position, corresponding to the axial lead of the valve cavity, of the valve seat 5;
the lower end of the valve core 4 has a convex portion 10 axially sliding into or out of the oil inlet hole a17 to close or open the oil inlet hole a 17; the valve core 4 is provided with a guide ring 15 which is in sliding fit with the valve cavity at the position above the convex part 10, and the lower end surface of the guide ring 15 is provided with an annular oil groove 14 which is sunken upwards and surrounds the convex part 10; preferably, the annular oil groove 14 has a right-angled trapezoidal cross section with a flow guide portion inclined inwardly from the outer end.
An oil discharge hole b18 communicating the valve cavity with the outside of the valve body 1 is radially arranged at the position of the lower part of the valve body 1 close to the upper surface of the valve seat 5;
the adjusting screw 8 penetrates through a threaded hole in the upper end of the valve body 1 in a threaded fit mode, the lower end of the adjusting screw 8 extends into the valve cavity to be in butt fit with the top end of the spring seat 2, and the portion, at the upper end of the valve body 1, of the adjusting screw 8 is sleeved with a locking nut 9 in threaded fit with the adjusting screw. The threaded hole at the upper end of the valve body 1 is arranged coaxially with the valve cavity. When the locking nut 9 locks the position of the adjusting screw 8, the lower end of the locking nut 9 is in butt fit with the upper end surface of the valve body 1. The upper end of the adjusting screw 8 is provided with a counter bore 16 for adjustment, and the counter bore 16 is square or regular hexagon so as to facilitate screwing in or screwing out of the adjusting screw 8 by a tool.
The valve body and the valve seat are connected together in a mortise pressing mode, the whole structure of the pressure control valve can be simplified, the whole size can be small, and the mounting working condition of a narrow area can be adapted. The lower surface of the guide ring on the valve core is provided with the annular oil groove, so that the valve core has a hydraulic compensation function, the valve core can offset the influence of hydraulic force by utilizing the recoil force of oil, and the opening/closing rate of the pressure control valve is good.
In order to facilitate the assembly of the spring, the elasticity of the spring can be ensured to stably act on the spring seat and the valve core, the lower part of the spring seat 2 is provided with a containing groove 11, the upper part of the valve core 4 is provided with an annular boss 12, the upper end of the spring 3 is assembled in the containing groove 11, and the lower end of the spring 3 is sleeved outside the annular boss 12.
In order to ensure that the sealing performance of the pressure control valve is better and the sealing performance is more stable, an annular groove 13 is arranged on the outer side of the upper part of the spring seat 2, and a second O-shaped sealing ring 7 which is in sliding sealing fit with the valve cavity is assembled in the annular groove 13; the outer side of the lower part of the valve body 1 is provided with a first O-shaped sealing ring 6. The traditional pressure control valve adopts an O-shaped ring and retaining ring type sealing structure in a high-pressure area in a sealing mode, and the O-shaped ring is easy to lose efficacy when high-pressure impact exists in the sealing structure, so that the pressure control valve can be caused to generate an oil leakage working condition, and the high-pressure resistance of the pressure control valve can be obviously deteriorated. The annular groove is formed in the outer side of the upper portion of the spring seat in sliding fit with the valve cavity, and the second O-shaped sealing ring is arranged in the annular groove, so that the high-pressure resistance of the pressure control valve in the face of high-pressure impact is better, and good sealing performance can be guaranteed when high-pressure impact exists.
In order to make the pressure control valve capable of withstanding higher pressures, the lower end surface of the valve seat 5 is of a planar structure. The lower end face of the valve seat is of a plane structure, so that when the pressure control valve is installed in the integrated block jack, the pressure control valve can be in contact fit with the plane at the bottom of the integrated block jack, a metal plane can be formed for sealing, hydraulic oil can be guaranteed not to leak through the gap between the valve seat and the plane at the bottom of the integrated block jack, and the pressure control valve can bear higher pressure. In addition, the lower end face of the valve seat is of a planar structure, and the valve seat can be processed conveniently.
The working process is as follows: the direct-acting pressure control valve is installed in an integrated block jack when in use, the bottom plane of the valve seat 5 is in contact with the bottom plane of the integrated block jack to form metal plane sealing, and hydraulic oil is prevented from leaking through a gap between the valve seat 5 and the bottom plane of the integrated block jack. The hydraulic oil acts on the valve core 4 through the oil inlet hole a17 on the valve seat 5, when the hydraulic pressure reaches the set pressure value of the spring 3, the valve core 4 is opened, and the oil enters the valve cavity through the oil inlet hole a17 on the valve seat 5 and returns to the oil tank from the oil outlet b18 on the valve body 1. The first O-shaped sealing ring 6 can ensure that the direct-acting pressure control valve is installed in the jack of the integrated valve block without the occurrence of the condition of external oil leakage, and the second O-shaped sealing ring 7 can ensure that oil in the direct-acting pressure control valve cannot leak out through the gap between the spring seat 2 and the valve body 1. Clockwise rotation pressure regulating screw 8, pressure regulating screw 8 can move down and promote spring holder 2 compression spring 3, the increase of 3 compressional capacities of spring, and direct action formula pressure control valve's pressure can rise, and pressure regulating screw 8 is selected anticlockwise equally, and spring 3 promotes spring holder 2 also rebound when pressure regulating screw 8 can the rebound, and the 3 compressional capacities of spring reduce, and direct action formula pressure control valve's pressure can reduce. When the locking nut 9 is screwed down, the pressure regulating screw 8 is locked, so that further pressure regulation cannot be performed, on the contrary, the locking nut 9 is unscrewed, the pressure regulating screw 8 is unlocked, and the pressure of the direct-acting pressure control valve can be regulated at the moment. The annular oil groove 14 that the bottom of case 4 has, when case 4 opens under hydraulic pressure force effect, hydraulic oil strikes on the annular oil groove 14 on case 4, and fluid can flow down along annular oil groove 14 to can offset the hydrodynamic force, enable pressure control valve's the rate of opening/closure better.
Claims (4)
1. A direct-acting pressure control valve comprises a valve body (1) and a valve core (4), wherein a valve cavity is arranged in the valve body (1) in the axial direction, and the valve core (4) is assembled at the lower part of the valve cavity in a sliding manner, and is characterized by further comprising an adjusting screw (8);
the valve cavity is also sequentially provided with a spring (3) and a spring seat (2) in the upper space of the valve core (4), and the upper end and the lower end of the spring (3) respectively act on the spring seat (2) and the valve core (4) in an axial elastic manner; the lower end of the valve cavity is sealed by a valve seat (5) which is pressed on the inner side of the lower opening end of the valve body (1), and an oil inlet hole a (17) is formed in the position, corresponding to the axial lead of the valve cavity, of the valve seat (5);
the lower end of the valve core (4) is provided with a convex part (10) which axially slides into or out of the oil inlet hole a (17) so as to close or open the oil inlet hole a (17); the valve core (4) is provided with a guide ring (15) which is in sliding fit with the valve cavity at the position above the convex part (10), and the lower end surface of the guide ring (15) is provided with an annular oil groove (14) which is sunken upwards in a manner of surrounding the convex part (10);
an oil discharge hole b (18) communicating the valve cavity with the outside of the valve body (1) is radially formed in the position, close to the upper surface of the valve seat (5), of the lower part of the valve body (1);
adjusting screw (8) wear to locate in the screw hole of valve body (1) upper end through screw-thread fit, and the lower extreme of adjusting screw (8) stretch into the valve pocket in with the top butt cooperation of spring holder (2), adjusting screw (8) partial cover in valve body (1) upper end is equipped with rather than through screw-thread fit's lock nut (9).
2. A direct-acting pressure control valve as claimed in claim 1, wherein the lower portion of the spring seat (2) is provided with a receiving groove (11), the upper portion of the valve core (4) is provided with an annular boss (12), the upper end of the spring (3) is fitted in the receiving groove (11), and the lower end of the spring (3) is sleeved outside the annular boss (12).
3. A direct-acting pressure control valve as claimed in claim 1 or 2, characterized in that the spring seat (2) is provided with an annular groove (13) on the outer side of the upper part thereof, and a second O-ring (7) in sliding sealing engagement with the valve chamber is fitted in the annular groove (13); and a first O-shaped sealing ring (6) is assembled on the outer side of the lower part of the valve body (1).
4. A direct acting pressure control valve as claimed in claim 3, characterized in that the lower end surface of the valve seat (5) is of planar configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721879729.6U CN210600323U (en) | 2017-12-28 | 2017-12-28 | Direct-acting pressure control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721879729.6U CN210600323U (en) | 2017-12-28 | 2017-12-28 | Direct-acting pressure control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210600323U true CN210600323U (en) | 2020-05-22 |
Family
ID=70720976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721879729.6U Expired - Fee Related CN210600323U (en) | 2017-12-28 | 2017-12-28 | Direct-acting pressure control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210600323U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112762207A (en) * | 2021-01-12 | 2021-05-07 | 上海航天控制技术研究所 | Hydraulic control one-way valve with safety function |
| CN114876887A (en) * | 2022-04-11 | 2022-08-09 | 东风汽车集团股份有限公司 | Control valve, ejector, fuel cell system and vehicle |
-
2017
- 2017-12-28 CN CN201721879729.6U patent/CN210600323U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112762207A (en) * | 2021-01-12 | 2021-05-07 | 上海航天控制技术研究所 | Hydraulic control one-way valve with safety function |
| CN114876887A (en) * | 2022-04-11 | 2022-08-09 | 东风汽车集团股份有限公司 | Control valve, ejector, fuel cell system and vehicle |
| CN114876887B (en) * | 2022-04-11 | 2023-12-19 | 东风汽车集团股份有限公司 | Control valve, ejector, fuel cell system and vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200522 |