CN113915183A - Overflow valve with adjustable buffer function - Google Patents
Overflow valve with adjustable buffer function Download PDFInfo
- Publication number
- CN113915183A CN113915183A CN202111068867.7A CN202111068867A CN113915183A CN 113915183 A CN113915183 A CN 113915183A CN 202111068867 A CN202111068867 A CN 202111068867A CN 113915183 A CN113915183 A CN 113915183A
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- Prior art keywords
- hole
- valve
- section
- valve seat
- middle section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003139 buffering effect Effects 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
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
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to a hydraulic element, in particular to an overflow valve with an adjustable buffering function, which comprises a valve body. The invention not only has the overflow function, but also has the functions of throttling buffering and being used as a safety valve, the one-time opening pressure is adjustable, and the buffering pressure and the buffering time can be realized by adjusting the size of the throttling hole and the length of the buffering area.
Description
Technical Field
The invention relates to a hydraulic element, in particular to an overflow valve with an adjustable buffering function.
Background
In a hydraulic drive traveling device, in order to prevent the service life of a traveling machine from being affected by pressure overload during traveling of a hydraulic motor, an overflow valve is generally provided to protect the traveling device. The existing overflow valve only has a pressure relief function for preventing equipment from being overloaded when the set pressure is exceeded, but has no buffer function. In this way, when the walking equipment is started or stopped, although the overflow valve prevents the pressure from being too high, the pressure rises too fast, and the impact is too large, so that the walking device is blocked, and the use feeling of a client is influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an overflow valve with an adjustable buffering function, which can adjust the buffering pressure and the buffering time according to the working environment of a walking machine and the use feeling of a client, and therefore, the invention adopts the technical scheme that:
the utility model provides an overflow valve with buffer function with adjustable, includes the valve body, is different with prior art, and two cascaded mounting holes are established relatively on the valve body, overflow valve unit of installation in every cascaded mounting hole, and every overflow valve unit includes from inside to outside in proper order:
the valve seat is integrally cylindrical, the inner end face of the valve seat is abutted against the bottom wall of the stepped mounting hole, the outer end face of the valve seat is provided with a concave conical surface, and the peripheral surface of the valve seat is in sealing fit with the stepped mounting hole;
the valve sleeve comprises a valve sleeve, an inner cavity and a valve seat, wherein the inner cavity is divided into an inner section hole, a middle section hole and an outer section hole, the diameter of the middle section hole is the smallest, one part of the inner section hole is sleeved on the valve seat, and the peripheral surface of the rest part of the inner section hole is provided with a radial hole; valve sleeve throttling holes are formed in the outer section holes along the radial direction;
the valve core comprises an inner section frustum, a middle section large circular truncated cone and an outer section small circular truncated cone, wherein part of the inner section frustum enters the valve seat, the conical surface of the inner section frustum and the concave conical surface of the valve seat form conical surface sealing, the rest part in the valve seat forms a valve seat cavity, the middle section large circular truncated cone and the middle section hole of the valve sleeve form sliding sealing, and the length of the middle section large circular truncated cone is greater than that of the middle section hole of the valve sleeve; a valve core throttling hole is formed along the axial direction;
the spring seat is sleeved on the small round table of the valve core, is positioned in the outer section hole of the valve sleeve and is provided with a spring seat throttling hole along the axial direction;
the spring is partially positioned in the outer section hole of the valve sleeve, and the inner end of the spring is abutted against the spring seat;
the buffer valve sleeve is sleeved on the valve sleeve and forms sliding seal with the valve sleeve and the stepped mounting hole respectively;
the plug comprises a large-hole inner section, a small-hole middle section and a screw hole outer section, wherein the large-hole inner section is in interference fit with the valve sleeve, and the outer part of the large-hole inner section is in threaded connection with the stepped mounting hole;
the pressurizing piston is positioned in the middle section of the plug small hole and forms sliding seal with the plug small hole, and the inner end of the pressurizing piston is abutted against the outer end of the spring;
the adjusting screw is in threaded connection with the outer section of the screw hole of the plug, and the inner end of the adjusting screw is abutted against the outer end of the pressurizing piston;
the valve body is provided with a first oil port and a second oil port, the first oil port is communicated with the valve seat cavity of one overflow valve unit and the radial hole of the other overflow valve unit, and the second oil port is communicated with the radial hole of the one overflow valve unit and the valve seat cavity of the other overflow valve unit.
Further, the adjusting device also comprises a locking nut which is in threaded connection with the adjusting screw.
Furthermore, the valve seat and the stepped mounting hole, the buffer valve sleeve and the valve sleeve are sealed through a check ring and an O-shaped ring, and the pressurizing piston and the small-hole middle section of the plug, the plug and the stepped mounting hole are sealed through the O-shaped ring.
Compared with the prior art, the invention not only has the overflow function, but also has the functions of throttling buffering and being used as a safety valve, the one-time opening pressure is adjustable, and the buffering pressure and the buffering time can be realized by adjusting the size of the throttling hole and the length of the buffering area.
Drawings
Fig. 1 is a schematic structural diagram of a valve body in an embodiment.
Fig. 2 is a schematic structural diagram of the multifunctional overflow valve in one state in the embodiment.
Fig. 3 is a schematic structural diagram of the multifunctional overflow valve in another state in the specific embodiment.
Fig. 4 is an enlarged view of the structure of the multifunctional overflow valve section part in the embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. While the terms "left", "right", "inside", "outside", etc., used in the embodiments indicate orientations or positional relationships based only on the orientations or positional relationships shown in the drawings, "a" and "two" are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1, the rear flange of the hydraulic motor is also used as a valve body 100 of the multifunctional overflow valve, two stepped mounting holes 101 are oppositely formed in the valve body 100, an overflow valve unit is mounted in each stepped mounting hole 101, and each overflow valve unit sequentially comprises from inside to outside:
the valve seat 10 is integrally cylindrical, the inner end surface of the valve seat is abutted to the bottom wall of the stepped mounting hole 101, the outer end surface of the valve seat is provided with a concave conical surface, and the peripheral surface of the valve seat is in sealing fit with the stepped mounting hole 101;
the valve sleeve 8 is characterized in that an inner cavity is divided into an inner section hole, a middle section hole and an outer section hole, the diameter of the middle section hole is the smallest, one part of the inner section hole is sleeved on the valve seat 10, and the circumferential surface of the rest part of the inner section hole is provided with a radial hole W; a valve sleeve throttling hole Z is formed in the outer section hole along the radial direction;
the valve core 9 comprises an inner section frustum, a middle section large frustum and an outer section small frustum, wherein part of the inner section frustum enters the valve seat 10, the conical surface of the inner section frustum and the concave conical surface of the valve seat 10 form conical surface sealing, the rest part in the valve seat 10 forms a valve seat cavity F, the middle section large frustum and the middle section hole of the valve sleeve 8 form sliding sealing, and the length of the middle section large frustum is larger than that of the middle section hole of the valve sleeve 8; a valve core throttling hole X is formed along the axial direction;
the spring seat 7 is sleeved on the small round table of the valve core 9, is positioned in the outer section hole of the valve sleeve 8, and is provided with a spring seat throttling hole Y along the axial direction;
the spring 6 is partially positioned in the outer section hole of the valve sleeve 8, and the inner end of the spring 6 is abutted against the spring seat 7;
the buffer valve sleeve 5 is sleeved on the valve sleeve 8 and forms sliding seal with the valve sleeve 8 and the stepped mounting hole 101 respectively;
the plug 4 comprises a large-hole inner section, a small-hole middle section and a screw hole outer section, wherein the large-hole inner section is in interference fit with the valve sleeve 8 and is externally screwed with the stepped mounting hole 101;
the pressurizing piston 3 is positioned in the middle section of the small hole of the plug 4 and forms sliding seal with the small hole, and the inner end of the pressurizing piston is abutted against the outer end of the spring 6;
the adjusting screw 1 is in threaded connection with the outer section of the screw hole of the plug 4, and the inner end of the adjusting screw is abutted against the outer end of the pressurizing piston 3;
the valve body 100 is provided with a first port a and a second port B, the first port a communicates with the valve seat cavity F of one overflow valve unit and the radial hole W of the other overflow valve unit, and the second port B communicates with the radial hole W of the one overflow valve unit and the valve seat cavity F of the other overflow valve unit.
The adjusting device also comprises a locking nut 2, wherein the locking nut 2 is in threaded connection with the adjusting screw 1.
The valve seat 10 and the stepped mounting hole 101, the buffer valve sleeve 5 and the valve sleeve 8 are sealed through check rings and O-shaped rings, and the pressurizing piston 3 and the small-hole middle section of the plug 4, and the O-shaped rings between the plug 4 and the stepped mounting hole 101 are sealed.
The adjusting screw 1 is in threaded connection with the plug 4 to adjust the precompression amount of an inner spring of the overflow valve, and is also the key for setting the pressure of the overflow valve, and after the adjusting screw is set, the locking nut is used for preventing looseness. The overflow valve is provided with three throttling holes which respectively comprise a valve core throttling hole X, a spring seat throttling hole Y and a valve sleeve throttling hole Z.
The working process of the present invention will be described below by taking the example that the traveling machine advances, and the traveling motor returns oil from the first oil port a and returns oil from the second oil port B.
When the oil inlet pressure of the first oil port A is smaller than the primary opening pressure of the overflow valves, the left overflow valve and the right overflow valves do not act. The primary opening pressure is the pressure of the high-pressure oil pushing the valve core to overcome the spring force.
As shown in fig. 2-4: when the oil inlet pressure of the first oil port A is larger than the primary opening pressure of the overflow valve, the valve core of the overflow valve on the right side is opened, and part of high-pressure oil enters the second oil port B through the radial hole W. Meanwhile, high-pressure oil enters the inner cavity of the valve sleeve through the valve core throttling hole X and the spring seat throttling hole Y, the overflow valve has a closing trend due to the area difference of two ends of the valve core, however, as the flow of the first oil port A continues to increase, when the valve core continues to be opened, the high-pressure oil in the valve sleeve cavity pushes the buffer valve sleeve 5 from the rightmost end to the leftmost end through the valve sleeve throttling hole Z, the pressure of the first oil port A in the process is basically kept unchanged, the process is called as the buffering effect of the overflow valve, the overflow valve serves as the buffer valve at the moment, and the buffering time is the time that the high-pressure oil enters the inner cavity of the valve sleeve through the valve core throttling hole X and the spring seat throttling hole Y, the time that the buffer valve sleeve is pushed to move to the limit position through the valve sleeve throttling hole Z, and the time that the pressure difference is balanced when the high-pressure oil is decompressed in the cavity. Therefore, the adjustment of the buffer pressure and the buffer time can be realized by adjusting the size of the throttling hole and the length of the buffer area, and the adjustable buffer function is realized. When the overflow valve reaches the set pressure, the valve core is completely opened, the overflow valve overflows, and the overflow valve serves as a safety valve.
The primary opening pressure is defined as the pressure of high-pressure oil pushing the valve core to overcome the spring force; the set pressure of the relief valve is defined as the pressure at which the relief valve completely overflows.
When the walking machine retreats, the hydraulic motor enters oil from the second oil port B and returns oil from the first oil port A, the working process is similar to the process, and the description is omitted.
Finally, the description is as follows: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (3)
1. The utility model provides an overflow valve with adjustable buffer function, includes valve body (100), its characterized in that, two cascaded mounting hole (101) are established relatively in valve body (100), overflow valve unit of installation in every cascaded mounting hole (101), every overflow valve unit includes from inside to outside in proper order:
the valve seat (10) is integrally cylindrical, the inner end face of the valve seat is abutted to the bottom wall of the stepped mounting hole (101), the outer end face of the valve seat is provided with a concave conical surface, and the peripheral surface of the valve seat is in sealing fit with the stepped mounting hole (101);
the valve sleeve (8) is characterized in that an inner cavity is divided into an inner section hole, a middle section hole and an outer section hole, the diameter of the middle section hole is the smallest, one part of the inner section hole is sleeved on the valve seat (10), and the circumferential surface of the rest part of the inner section hole is provided with a radial hole (W); a valve sleeve throttling hole (Z) is formed in the outer section hole along the radial direction;
the valve core (9) comprises an inner section frustum, a middle section large frustum and an outer section small frustum, wherein part of the inner section frustum enters the valve seat (10), the conical surface of the inner section frustum and the concave conical surface of the valve seat (10) form conical surface sealing, the rest part in the valve seat (10) forms a valve seat cavity (F), the middle section large frustum and the middle section hole of the valve sleeve (8) form sliding sealing, and the length of the middle section large frustum is greater than that of the middle section hole of the valve sleeve (8); a valve core throttling hole (X) is formed along the axial direction;
the spring seat (7) is sleeved on the small round table of the valve core (9), is positioned in the outer section hole of the valve sleeve (8), and is provided with a spring seat throttling hole (Y) along the axial direction;
the spring (6) is partially positioned in the outer section hole of the valve sleeve (8), and the inner end of the spring is abutted against the spring seat (7);
the buffer valve sleeve (5) is sleeved on the valve sleeve (8) and forms sliding seal with the valve sleeve (8) and the stepped mounting hole (101) respectively;
the plug (4) comprises a large-hole inner section, a small-hole middle section and a screw hole outer section, the large-hole inner section is in interference fit with the valve sleeve (8), and the outer part of the large-hole inner section is in threaded connection with the stepped mounting hole (101);
the pressurizing piston (3) is positioned in the middle section of the small hole of the plug (4) and forms sliding seal with the small hole, and the inner end of the pressurizing piston is abutted against the outer end of the spring (6);
the adjusting screw (1) is in threaded connection with the outer section of the screw hole of the plug (4), and the inner end of the adjusting screw is abutted against the outer end of the pressurizing piston (3);
a first oil port (A) and a second oil port (B) are formed in the valve body (100), the first oil port (A) is communicated with a valve seat cavity (F) of one overflow valve unit and a radial hole (W) of the other overflow valve unit, and the second oil port (B) is communicated with the radial hole (W) of the one overflow valve unit and the valve seat cavity (F) of the other overflow valve unit.
2. The overflow valve with the adjustable buffering function as claimed in claim 1, further comprising a locking nut (2), wherein the locking nut (2) is in threaded connection with the adjusting screw (1).
3. The overflow valve with the adjustable buffering function as claimed in claim 1, wherein the valve seat (10) and the stepped mounting hole (101) and the buffering valve sleeve (5) and the valve sleeve (8) are sealed by a retaining ring and an O-ring, and the pressurizing piston (3) and the small hole middle section of the plug (4) and the O-rings between the plug (4) and the stepped mounting hole (101) are sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111068867.7A CN113915183A (en) | 2021-09-13 | 2021-09-13 | Overflow valve with adjustable buffer function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111068867.7A CN113915183A (en) | 2021-09-13 | 2021-09-13 | Overflow valve with adjustable buffer function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113915183A true CN113915183A (en) | 2022-01-11 |
Family
ID=79234765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111068867.7A Pending CN113915183A (en) | 2021-09-13 | 2021-09-13 | Overflow valve with adjustable buffer function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113915183A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115263840A (en) * | 2022-06-30 | 2022-11-01 | 潍柴动力股份有限公司 | Buffer adjustable overflow valve for walking motor and walking system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07243402A (en) * | 1994-03-04 | 1995-09-19 | Kubota Corp | Hydraulic pressure gradually varying mechanism |
| JPH10122401A (en) * | 1996-10-14 | 1998-05-15 | Kayaba Ind Co Ltd | Pressure rising buffer mechanism for relief valve |
| CN102235393A (en) * | 2011-08-15 | 2011-11-09 | 宁波广天赛克思液压有限公司 | Buffer relief valve for hydraulic motor |
| CN203604303U (en) * | 2013-12-18 | 2014-05-21 | 博世力士乐（北京）液压有限公司 | Overflow valve |
| CN111911473A (en) * | 2020-06-30 | 2020-11-10 | 苏州远上精密机械有限公司 | Screw pressure regulating overflow valve |
| CN113446275A (en) * | 2021-06-25 | 2021-09-28 | 青岛力克川液压机械有限公司 | Integral plug-in type hydraulic braking buffer valve |
| CN113898628A (en) * | 2021-09-22 | 2022-01-07 | 江苏汇智高端工程机械创新中心有限公司 | Super-large flow bidirectional balance valve |
| CN216158387U (en) * | 2021-09-13 | 2022-04-01 | 烟台艾迪液压科技有限公司 | Multifunctional overflow valve |
| CN114791049A (en) * | 2021-01-26 | 2022-07-26 | 杭州力龙液压有限公司 | Overflow valve and hydraulic motor with same |
-
2021
- 2021-09-13 CN CN202111068867.7A patent/CN113915183A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07243402A (en) * | 1994-03-04 | 1995-09-19 | Kubota Corp | Hydraulic pressure gradually varying mechanism |
| JPH10122401A (en) * | 1996-10-14 | 1998-05-15 | Kayaba Ind Co Ltd | Pressure rising buffer mechanism for relief valve |
| CN102235393A (en) * | 2011-08-15 | 2011-11-09 | 宁波广天赛克思液压有限公司 | Buffer relief valve for hydraulic motor |
| CN203604303U (en) * | 2013-12-18 | 2014-05-21 | 博世力士乐（北京）液压有限公司 | Overflow valve |
| CN111911473A (en) * | 2020-06-30 | 2020-11-10 | 苏州远上精密机械有限公司 | Screw pressure regulating overflow valve |
| CN114791049A (en) * | 2021-01-26 | 2022-07-26 | 杭州力龙液压有限公司 | Overflow valve and hydraulic motor with same |
| CN113446275A (en) * | 2021-06-25 | 2021-09-28 | 青岛力克川液压机械有限公司 | Integral plug-in type hydraulic braking buffer valve |
| CN216158387U (en) * | 2021-09-13 | 2022-04-01 | 烟台艾迪液压科技有限公司 | Multifunctional overflow valve |
| CN113898628A (en) * | 2021-09-22 | 2022-01-07 | 江苏汇智高端工程机械创新中心有限公司 | Super-large flow bidirectional balance valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115263840A (en) * | 2022-06-30 | 2022-11-01 | 潍柴动力股份有限公司 | Buffer adjustable overflow valve for walking motor and walking system |
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