CN103104564B - Inserting installation type balance valve - Google Patents
Inserting installation type balance valve Download PDFInfo
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- CN103104564B CN103104564B CN201210538147.7A CN201210538147A CN103104564B CN 103104564 B CN103104564 B CN 103104564B CN 201210538147 A CN201210538147 A CN 201210538147A CN 103104564 B CN103104564 B CN 103104564B
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- valve
- spool
- chamber
- hydraulic fluid
- fluid port
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Abstract
An inserting installation type balance valve comprises a barrel-shaped valve body, an end cover, a threaded plug, a valve core, a valve seat and a piston, wherein the valve body is provided with a first oil mouth and a second oil mouth and is provided with a first cavity and a second cavity along the axial direction, and the end cover and the threaded plug are respectively connected with two ends of the valve body in a sealing mode. A third oil mouth is formed in the rear end of the threaded plug, and a filter screen and a damper are arranged at the third oil mouth position. The valve seat is arranged inside the first cavity of the valve body and located between the first oil mouth and the second oil mouth. The front section of the valve core is matched inside the end cover in a sliding mode, and the rear section of the valve core is matched inside a through hole of the valve seat. The valve core is provided with an inner cavity which penetrates through the valve core in the axial direction, and a steel ball which is matched with the inner cavity of the valve core is arranged inside the valve core. The inner cavity of the valve core is provided with a protruding platform which is used for limiting the steel ball in the axial direction and is provided with a first spring which abuts against the steel ball, and the other end of the first spring abuts against the interior of the end cover. The piston is matched inside the second cavity in a sliding mode, and a ladder end of a piston rod penetrates through a chamber wall between the first cavity and the second cavity and is matched with the inner cavity of the valve core in a sliding mode. The inserting installation type balance valve is simple in structure, compact in size and stable in work.
Description
Technical field
The present invention relates to a kind of hydrovalve, particularly relate to the cartridge balanced valve be applied in oil hydraulic circuit.
Background technique
In the machinery such as engineering machinery, building machinery in modern times, widely applied the oil hydraulic circuit that hoists, wherein equilibrium valve is the crucial hydraulic element controlling oil hydraulic motor work in hoisting circuit, and the quality of equilibrium valve performance directly affects the performance of main frame.
Existing equilibrium valve is divided into board-like equilibrium valve and cartridge balanced valve two kinds by Placement, in order to reduce installing space in telescopic oil cylinder of crane, improving system reliability, generally adopting cartridge balanced valve.Patent No. ZL01139273.8 name is called that the patent of invention of " a kind of equilibrium valve " provides a kind of equilibrium valve of plug-in type.It comprises main valve, pilot valve, above-mentioned each valve all comprises two chambeies be positioned at before and after spool, and wherein main valve comprises valve pocket, main valve plug, and described valve pocket is cylindrical tube, the outer side surface of valve pocket is provided with the first main hydraulic fluid port A and the second main hydraulic fluid port B, and pilot valve is positioned at main valve plug.This equilibrium valve is owing to can directly insert oil hydraulic cylinder head, due to multiple spring structures that its main spool spring adopts rigidity to differ, mix the skewed slot on main valve plug conical side surface, make control more accurate, sensitive, even if when decompression, pilot valve in main valve plug can close rapidly the oil circuit between the second main hydraulic fluid port and the first main hydraulic fluid port, can prevent load stall from declining, play the effect of a hydraulic lock.
But there is following shortcoming in this equilibrium valve:
1, this balancing valve structure is complicated, required precision is high, the requirement of coaxality is had just to have more than six places between each part, and it is all minimum that being slidably matched of main valve plug and valve pocket, pilot valve and main valve plug locates gap, manufacturing process difficulty is large, during product actual use, spool easily blocks, thus can affect the reliability of host work.
2, to be located at main valve plug (balance valve core) inner for the pilot valve (nonreturn valve core) of this equilibrium valve, main valve plug wired seal request again and between valve pocket, also wired seal request between pilot valve and main valve plug.This just requires that will there be very high hardness at main valve plug conical side surface place, and to prevent the wearing and tearing of part, and main valve plug inner chamber is relative lower again with pilot valve cooperation place hardness.This just proposes very high request to the heat treatment of main valve plug and material, adds processing cost.
3, because the pilot valve of this equilibrium valve is located at main valve plug inside, in order to reduce flow resistance, certainly will will increase the size of pilot valve, the size of main valve plug and valve pocket also will become large in succession, makes the overall dimensions of equilibrium valve bigger than normal.And the diameter of oil hydraulic cylinder is certain, the oversize words of equilibrium valve will make the machining allowance of the plug-in opening on oil hydraulic cylinder less than normal, cause certain difficulty to processing.
Summary of the invention
Technical problem to be solved by this invention is: the above-mentioned shortcoming overcoming prior art, provides that a kind of structure is simple, volume compact, the reliable cartridge balanced valve of working stability.
The present invention's adopted technological scheme that solves the problem is: a kind of cartridge balanced valve, comprises and is provided with the first hydraulic fluid port and the second hydraulic fluid port and arranges the piston that the valve body of the tubular of the first chamber and the second chamber, the end cap being sealedly connected on valve body two ends respectively and screw plug, spool, steel ball, valve seat and cover have the second spring vertically; Described screw plug rear end is provided with the 3rd hydraulic fluid port, and described 3rd oil port is provided with filter screen and damper, and described valve seat is located in valve body first chamber, and between the first hydraulic fluid port, the second hydraulic fluid port; Described spool leading portion is slidably tied in end cap, the back segment of described spool is matched with in the through hole of valve seat, described spool is provided with the inner chamber axially run through, the first steel ball matched with valve core cavity is provided with in described spool, and described valve core cavity is provided with the boss for carrying out axial limiting to steel ball, described valve core cavity is provided with the first spring offseted with the first steel ball, and the other end of described first spring is butted in end cap; Described piston is sliding to be assigned in the second chamber, and the stepped end of piston rod is slidably tied in the inner chamber of spool through the locular wall the first chamber and the second chamber.
Compared with prior art, the invention has the advantages that: this cartridge balanced valve structure is simple, volume compact, and between each part, coaxality is less, and the place that is slidably matched is less demanding, manufacturing process is simple.This cartridge balanced valve is only provided with a spool, and some the technologic problems related to during without the need to considering main valve plug and pilot valve plug-in mounting, reduce processing cost.And the size of this equilibrium valve more easily ensures, can be plugged in easily into oil hydraulic cylinder head.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of cartridge balanced valve of the present invention.
Fig. 2 is the structural representation of a kind of cartridge balanced valve of the present invention.(when load is risen)
Fig. 3 is the structural representation of a kind of cartridge balanced valve of the present invention.(when load declines)
Fig. 4 is the application hydraulic schematic diagram of a kind of cartridge balanced valve of the present invention.
Shown in Fig. 1-4: 1 end cap, 2 valve bodies, 3 first springs, 4 spring seats, 5 steel balls, 6 spools, 6.1 boss, 7 valve seats, 8 piston rods, 9 second springs, 10 pistons, 11 dampers, 12 screw plugs, 13 filter screens.
A first hydraulic fluid port, B second hydraulic fluid port, X, the 3rd hydraulic fluid port.
G first chamber, H second chamber.
A first radial direction through hole, b second radial direction through hole, c third through-hole.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are further described.
As shown in Figure 1, a kind of cartridge balanced valve, comprises and is provided with the first hydraulic fluid port A and the second hydraulic fluid port B and arranges the piston 10 that the valve body 2 of the tubular of the first chamber G and the second chamber H, the end cap 1 being sealedly connected on valve body 2 two ends respectively and screw plug 12, spool 6, valve seat 7 and cover have the second spring vertically; Described screw plug 12 rear end is provided with the 3rd hydraulic fluid port X, and described 3rd hydraulic fluid port X place is provided with filter screen 13 and damper 11, and described valve seat 7 is located in valve body 2 first chamber G, and between the first hydraulic fluid port A, the second hydraulic fluid port B; Described spool 6 leading portion is slidably tied in end cap 1, the back segment of described spool 6 is matched with in the through hole of valve seat 7, described spool 6 is provided with the inner chamber axially run through, the steel ball 5 matched with spool 6 inner chamber is provided with in described spool 6, and described spool 6 inner chamber is provided with the boss 6.1 for carrying out axial limiting to steel ball, described spool 6 inner chamber is provided with the first spring 3 offseted with steel ball 5, and the other end of described first spring 3 is butted in end cap 1; Described piston 10 is sliding to be assigned in the second chamber H, and the stepped end of piston rod 8 is slidably tied in the inner chamber of spool 6 through the locular wall the first chamber G and the second chamber H.
The periphery that described spool 6 back segment matches with the through hole of valve seat 7 is conical surface, and the outer conical surface of described spool 6 coordinates with valve seat 7 linear sealing.
Be provided with the first radial direction through hole a of connection second hydraulic fluid port B and spool 6 inner chamber in the middle part of described spool 6, described spool 6 rear end is provided with the second radial direction through hole b of connection first hydraulic fluid port A and spool 6 inner chamber.
Locular wall between first chamber G of described valve body 2 and the second chamber H is provided with the third through-hole c of connection two chamber.
Working principle of the present invention is as shown in Figure 2,3:
1, when load is risen, beaten by selector valve in left position, hydraulic oil enters valve body 2 from the first hydraulic fluid port A, and the third through-hole c that on the one hand hydraulic oil is provided with by the locular wall between the first chamber G of valve body 2 and the second chamber H enters the second chamber H.On the other hand, hydraulic oil acts on impacting force spool 6 overcoming the first spring 3, and spool 6 is moved to left, and at this moment, hydraulic oil can flow to the second hydraulic fluid port B by the first hydraulic fluid port A, and enters the rodless cavity B1 of oil hydraulic cylinder, thus promotes load rising.
2, when load declines, selector valve is got to right position, hydraulic oil flows into cavity by the 3rd hydraulic fluid port X by through hole on filter screen 13 and damper 11 and acts on piston 11, and the active force promotion piston 10 overcoming the second spring 9 moves to left, piston rod 8 external part of piston 10 first pushes up steel ball 5 and steel ball 5 backs down by the active force overcoming the first spring 3, at this moment, the hydraulic oil of the second hydraulic fluid port B flows into spool 6 inner chamber by the first radial direction through hole a in the middle part of spool 6, and flow into the first hydraulic fluid port A by the second radial direction through hole b of spool 6 rear end, thus load is slowly declined.Piston 10 continues to move to left, and the piston rod 8 external part top of piston 10 on spool 6, and makes spool 6 depart from valve seat 7, and at this moment the hydraulic oil of the second hydraulic fluid port B flows into the first hydraulic fluid port A by the gap between spool 6 and valve body 2 again, thus load rate of descent is accelerated.
3, when loadlock aloft time, selector valve is beaten at meta, 3rd hydraulic fluid port X takes back fuel tank, the path of cut-out pressure source and selector valve A1, under the pressure effect that spool 6 produces in the first spring 3 and load, makes spool 6 reset, the outer conical surface of spool 6 back segment matches with valve seat 7 again, form linear sealing, cut off the path between the first hydraulic fluid port A and the second hydraulic fluid port B, by loadlock aloft.
Claims (4)
1. a cartridge balanced valve, comprises and is provided with the first hydraulic fluid port (A) and the second hydraulic fluid port (B) and arranges the piston (10) that the valve body (2) of the tubular of the first chamber (G) and the second chamber (H), the end cap (1) being sealedly connected on valve body (2) two ends respectively and screw plug (12), spool (6), valve seat (7) and cover have the second spring vertically, described screw plug (12) rear end is provided with the 3rd hydraulic fluid port (X), described 3rd hydraulic fluid port (X) place is provided with filter screen (13) and damper (11), it is characterized in that: described valve seat (7) is located in valve body (2) first chamber (G), and be positioned between the first hydraulic fluid port (A), the second hydraulic fluid port (B), described spool (6) leading portion is slidably tied in end cap (1), the back segment of described spool (6) is matched with in the through hole of valve seat (7), described spool (6) is provided with the inner chamber axially run through, the steel ball (5) matched with spool (6) inner chamber is provided with in described spool (6), and described spool (6) inner chamber is provided with the boss (6.1) for carrying out axial limiting to steel ball, described spool (6) inner chamber is provided with the first spring (3) offseted with steel ball (5), the other end of described first spring (3) is butted in end cap (1), described piston (10) is sliding to be assigned in the second chamber (H), and the stepped end of piston rod (8) is slidably tied in the inner chamber of spool (6) through the locular wall the first chamber (G) and the second chamber (H).
2. a kind of cartridge balanced valve according to claim 1, it is characterized in that: the periphery that described spool (6) back segment matches with the through hole of valve seat (7) is conical surface, and the outer conical surface of described spool (6) coordinates with valve seat (7) linear sealing.
3. a kind of cartridge balanced valve according to claim 1, it is characterized in that: described spool (6) middle part is provided with the first radial direction through hole (a) of connection second hydraulic fluid port (B) and spool (6) inner chamber, and its rear end is provided with the second radial direction through hole (b) of connection first hydraulic fluid port (A) and spool (6) inner chamber.
4. a kind of cartridge balanced valve according to claim 3, is characterized in that: the locular wall between first chamber (G) of described valve body (2) and the second chamber (H) is provided with the third through-hole (c) of connection two chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210538147.7A CN103104564B (en) | 2012-12-13 | 2012-12-13 | Inserting installation type balance valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210538147.7A CN103104564B (en) | 2012-12-13 | 2012-12-13 | Inserting installation type balance valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103104564A CN103104564A (en) | 2013-05-15 |
| CN103104564B true CN103104564B (en) | 2015-07-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210538147.7A Expired - Fee Related CN103104564B (en) | 2012-12-13 | 2012-12-13 | Inserting installation type balance valve |
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| Country | Link |
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| CN (1) | CN103104564B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948148B (en) * | 2015-06-30 | 2018-02-02 | 中国石油大学(华东) | A kind of stepless volume control device |
| CN108252973B (en) * | 2018-01-20 | 2020-07-14 | 上海欧特莱阀门机械有限公司 | Plug-in type direct-acting proportional pressure reducing valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4002755A1 (en) * | 1990-01-31 | 1991-08-01 | Daimler Benz Ag | Automatic distributor valve controlling oil supply - has spool valve actuated by inlet pressure to apportion pump output between first and second user |
| CN101435446A (en) * | 2007-11-14 | 2009-05-20 | 上海立新液压有限公司 | Balance valve |
| CN201475070U (en) * | 2009-08-21 | 2010-05-19 | 宁波汉商液压有限公司 | Cartridge balance valve |
| CN201547364U (en) * | 2009-11-06 | 2010-08-11 | 周重威 | Liquid-control flow valve for ultra-high-pressure double-pole pump |
| EP2466155A1 (en) * | 2010-12-15 | 2012-06-20 | HAWE Hydraulik SE | Hydraulically unlocked return-seat valve |
| CN203051273U (en) * | 2012-12-13 | 2013-07-10 | 陈磊 | Plug-in mounting type balance valve |
-
2012
- 2012-12-13 CN CN201210538147.7A patent/CN103104564B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4002755A1 (en) * | 1990-01-31 | 1991-08-01 | Daimler Benz Ag | Automatic distributor valve controlling oil supply - has spool valve actuated by inlet pressure to apportion pump output between first and second user |
| CN101435446A (en) * | 2007-11-14 | 2009-05-20 | 上海立新液压有限公司 | Balance valve |
| CN201475070U (en) * | 2009-08-21 | 2010-05-19 | 宁波汉商液压有限公司 | Cartridge balance valve |
| CN201547364U (en) * | 2009-11-06 | 2010-08-11 | 周重威 | Liquid-control flow valve for ultra-high-pressure double-pole pump |
| EP2466155A1 (en) * | 2010-12-15 | 2012-06-20 | HAWE Hydraulik SE | Hydraulically unlocked return-seat valve |
| CN203051273U (en) * | 2012-12-13 | 2013-07-10 | 陈磊 | Plug-in mounting type balance valve |
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| Publication number | Publication date |
|---|---|
| CN103104564A (en) | 2013-05-15 |
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| ASS | Succession or assignment of patent right |
Owner name: NINGBO JIANGDONG SIKAO TECHNOLOGY SERVICE CO., LTD Free format text: FORMER OWNER: CHEN LEI Effective date: 20150414 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 315137 NINGBO, ZHEJIANG PROVINCE TO: 315043 NINGBO, ZHEJIANG PROVINCE |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20150414 Address after: 315043, No. 4, No. 26, Dongfang business center, Jiangdong District, Zhejiang, Ningbo Applicant after: Ningbo Jiangdong Sikao Technology Service Co., Ltd. Address before: 315137, Zhejiang, Ningbo province Yinzhou District Yunlong Town Di village Di River District Applicant before: Chen Lei |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150701 Termination date: 20151213 |
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| EXPY | Termination of patent right or utility model |