CN201155499Y - Engineering machinery one-way balance valve - Google Patents
Engineering machinery one-way balance valve Download PDFInfo
- Publication number
- CN201155499Y CN201155499Y CNU2008203001345U CN200820300134U CN201155499Y CN 201155499 Y CN201155499 Y CN 201155499Y CN U2008203001345 U CNU2008203001345 U CN U2008203001345U CN 200820300134 U CN200820300134 U CN 200820300134U CN 201155499 Y CN201155499 Y CN 201155499Y
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- valve
- valve seat
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Abstract
The utility model relates to an engineering machinery one-way balance valve integrating the structures of a one-way valve and a balance valve. The utility model consists of a valve body and a valve core; wherein, the valve body is provided with a control valve chamber and a balance valve chamber; a barrel-shaped combination valve seat is installed in the balance valve chamber through close fit; wherein, the combination valve seat is provided with two spacing devices which are respectively arranged in the forward and backward directions; mobile spaces are arranged in the forward and backward directions; the edge of the center hole of the combination valve seat forms a valve port; the main valve core is provided with a sealing face matching with the valve port. As the combination valve seat is provided with the mobile spaces and the spacing devices in the forward and backward directions, when opening the valve, the main valve core moves backward after being pushed by the external control valve core, the combination valve seat moves along with the main valve core through the function of the spring of the combination valve seat until the combination valve seat reaches the extremity of the limited location, and then the main valve core continues to move backward and the valve is fully opened. Thereby the valve can be opened steadily, and the heavy objects can be lowered steadily. When the pressure oil is piloted from the B port, the combination valve seat is pushed open in the opposite direction, the pressure oil flows freely from the B port to the A port, thus protecting the one-way valve.
Description
Technical field
The utility model relates in a kind of engineering machinery hydraulic control system and to keep the weight load steadily to drop to the equilibrium valve of feature, the unidirectional equilibrium valve of engineering machinery that particularly a kind of one-way valve, equilibrium valve function and structure are integrated in one.
Background technique
In hydraulic construction machines such as the engineering machinery in modern times, building machinery, equilibrium valve is crucial hydraulic element, and its performance and quality are directly connected to the performance of whole system.Unidirectional equilibrium valve comprises valve body, spool, described valve body is provided with control valve pocket peace weighing apparatus valve pocket, and be provided with the A mouth of balance valve pocket UNICOM, B mouth and with the control port of control valve pocket UNICOM, be provided with the external control spool in the described control valve pocket, be provided with balance valve core in the balance valve pocket and valve port matches, on valve body, be respectively equipped with A, B, X hydraulic fluid port.Existing equilibrium valve restriction form simple in structure is single, and the weight smooth decreasing is poor; In addition, one-way valve of Chang Binglian solves free-pouring needs in the other direction, and physical dimension is big.
Summary of the invention
The utility model is to provide the unidirectional equilibrium valve of engineering machinery of a kind of compact structure, raising weight smooth decreasing and reliability.
In order to achieve the above object, the technical solution adopted in the utility model is as follows: the unidirectional equilibrium valve of a kind of engineering machinery, comprise control valve and equilibrium valve, described unidirectional equilibrium valve comprises valve body, spool, described valve body is provided with control valve pocket peace weighing apparatus valve pocket, and be provided with A mouth with balance valve pocket UNICOM, the B mouth and with the control port of control valve pocket UNICOM, be provided with the external control spool in the described control valve pocket, be provided with balance valve core in the balance valve pocket, it is characterized in that: described valve body is an integral structure, the axis of described control valve pocket peace weighing apparatus valve pocket is on the same straight line, be provided with linked hole between the described control valve pocket peace weighing apparatus valve pocket, the close composite valve seat that is provided with tubular movingly of described equilibrium valve intraluminal fluid, described composite valve seat is provided with position-limit mechanism on former and later two directions, former and later two directions all leave mobile space, the main valve plug front end passes the close linked hole that is arranged on movingly of composite valve seat center hole liquid towards the control valve pocket and offsets with the control spool, composite valve seat center hole edge constitutes valve port, main valve plug be provided with the sealing surface that matches with valve port with the balance valve pocket be divided into respectively with A mouth and B mouth UNICOM go out oil pocket and oil suction chamber two-part, also being provided with the composite valve seat spring in the described balance valve pocket makes composite valve seat have a power of pressing to the main valve plug sealing surface, the main valve plug rear end is provided with pressure spring, also is provided with the face formation drive surface with axis normal on described composite valve seat and B mouth UNICOM one side.
Compared with prior art, the beneficial effects of the utility model are: the unidirectional equilibrium valve of this engineering machinery has the function of one-way valve and equilibrium valve concurrently, compact structure, and because the close composite valve seat that is provided with tubular movingly of equilibrium valve intraluminal fluid, composite valve seat center hole edge constitutes valve port, main valve plug is provided with the sealing surface that matches with valve port, former and later two directions of composite valve seat are provided with and leave mobile space and position-limit mechanism, during valve opening, when main valve plug retreats under the promotion of external control spool, composite valve seat moves with main valve plug under the composite valve seat spring action in the initial procedure, arrive spacing position until composite valve seat, main valve plug continues to retreat, the valve complete opening, therefore valve opening is steady, has improved the stationarity that weight descends.
The utility model is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Description of drawings
Accompanying drawing 1 is the utility model specific embodiment structure sectional view.
Embodiment
As shown in Figure 1, the unidirectional equilibrium valve of engineering machinery still comprises valve body 1, spool, valve body 1 is an integral structure, be and be bar shape, it can be cylindrical or four prism type, valve body 1 two ends are provided with blind hole and constitute control valve end cap cavity volume 2 and balance valve pocket 3 respectively, be provided with linked hole 4 between control valve end cap cavity volume 2 and the balance valve pocket 3, control valve end cap 5 is arranged in the control valve end cap cavity volume 2, control valve end cap 5 the inners are provided with control valve pocket 6, the axis of control valve pocket 6 and balance valve pocket 3 preferably is on the same straight line, control valve end cap 5 outer ends are provided with and control the control port 7 of valve pocket 6 UNICOMs, control spool 8 is the short cylindrical that an end is provided with boss, liquid is close to be arranged in the control valve pocket 6 movingly, boss is aimed at linked hole 4, the B mouth is arranged on the middle part of valve body 1 side, the A mouth is arranged between B mouth and the control valve end cap cavity volume 2, by linked hole 4 and control valve pocket 6 UNICOMs, be provided with the sliding chamber 9 of composite valve seat between A mouth and the B mouth, composite valve seat 10 liquid of tubular are close to be provided with wherein movingly, the sliding chamber of composite valve seat 9 length are greater than composite valve seat 10, composite valve seat spring 11 is arranged in the composite valve seat 10, the sliding chamber 9 of composite valve seat constitutes the spacing of composite valve seat 10 1 sides near the through-hole diameter of A mouth one end less than the sliding chamber of composite valve seat 9 diameters, composite valve seat 10 constitutes drive surface 12 near the end face of B mouth one end, balance valve pocket 3 opening ends are inserted with tubular main valve core retainer plate 13, main valve core retainer plate 13 front ends constitute the spacing of composite valve seat 10 opposite sides near the sliding chamber 9 of composite valve seat, main valve core retainer plate 13 afterbodys are provided with closed end cap, pressure spring 14 is arranged in the main valve core retainer plate 13, main valve plug 15 is the thinner rod component in thick stage casing, two ends, main valve plug 15 front ends pass close being arranged on movingly in the linked hole 4 and with control spool 8 of composite valve seat 10 center hole liquid towards control valve pocket 6 and offset, rear end liquid is close to be arranged in main valve core retainer plate 13 front ends movingly, and be provided with the conical surface that matches with valve port and constitute described sealing surface 16, pressure spring 14 1 ends are against on the closed end cap, the other end is against on the spring seat 17 that is arranged on main valve plug 15 tail ends, under original state, main valve plug 15 front ends are against on the control spool 8, the sealing surface 16 of main valve plug 15 offsets with the valve port on the composite valve seat 10, and composite valve seat 10 is in the sliding chamber 9 of composite valve seat, all leave mobile space in former and later two directions.
The working principle of the unidirectional equilibrium valve of this engineering machinery is as follows:
External control pressure oil from the opposite side working oil path promotes control spool 8, control spool 8 promotes main valve plug 15 and retreats, composite valve seat 10 moves with main valve plug 15 under 11 effects of composite valve seat spring in the initial procedure, arrive spacing position until composite valve seat 10, main valve plug 15 continues to retreat, the valve complete opening; After external control pressure oil was removed, main valve plug 15 moved forward under the promotion of pressure spring 14, and up to being against on the control spool 8, composite valve seat 10 is at composite valve seat spring 11 effect lower sealing surface 16 and valve port on the composite valve seat 10 throttle down that offsets.
When pressure oil when the B mouth attracts, pressure oil acts on the drive surface 12 of valve port outer rim composite valve seat 10, pushes composite valve seat 10 open, pressure oil to the A mouth, plays the effect of one-way valve from B mouth free stream.
Claims (2)
1. unidirectional equilibrium valve of engineering machinery, comprise control valve and equilibrium valve, described unidirectional equilibrium valve comprises valve body, spool, described valve body is provided with control valve pocket peace weighing apparatus valve pocket, and be provided with A mouth with balance valve pocket UNICOM, the B mouth and with the control port of control valve pocket UNICOM, be provided with the external control spool in the described control valve pocket, be provided with balance valve core in the balance valve pocket, it is characterized in that: described valve body is an integral structure, the axis of described control valve pocket peace weighing apparatus valve pocket is on the same straight line, be provided with linked hole between the described control valve pocket peace weighing apparatus valve pocket, the close composite valve seat that is provided with tubular movingly of described equilibrium valve intraluminal fluid, described composite valve seat is provided with position-limit mechanism on former and later two directions, former and later two directions all leave mobile space, the main valve plug front end passes the close linked hole that is arranged on movingly of composite valve seat center hole liquid towards the control valve pocket and offsets with the control spool, composite valve seat center hole edge constitutes valve port, main valve plug be provided with the sealing surface that matches with valve port with the balance valve pocket be divided into respectively with A mouth and B mouth UNICOM go out oil pocket and oil suction chamber two-part, also being provided with the composite valve seat spring in the described balance valve pocket makes composite valve seat have a power of pressing to the main valve plug sealing surface, the main valve plug rear end is provided with pressure spring, also is provided with the face formation drive surface with axis normal on described composite valve seat and B mouth UNICOM one side.
2. by the unidirectional equilibrium valve of the described engineering machinery of claim 1, it is characterized in that: described valve body is a cylinder, the valve body two ends are provided with blind hole and constitute control valve end cap cavity volume and balance valve pocket respectively, the control valve end cap is arranged in the control valve end cap cavity volume, control valve end cap the inner is provided with the control valve pocket, the outer end is provided with and controls the control port of valve pocket UNICOM, the external control spool is provided with wherein movingly with control valve pocket liquid is close, the B mouth is arranged on the middle part of valve body side, the A mouth is arranged between B mouth and the control valve end cap cavity volume, be provided with the sliding chamber of composite valve seat between A mouth and the B mouth, the sliding cavity length of composite valve seat is greater than composite valve seat, the composite valve seat liquid of tubular is close to be provided with wherein movingly, the composite valve seat spring is arranged in the composite valve seat, drive surface is made of the end face of composite valve seat, balance valve pocket opening end is inserted with tubular main valve core retainer plate, main valve core retainer plate afterbody is provided with closed end cap, pressure spring is arranged in the main valve core retainer plate, front end constitutes described position-limit mechanism mechanism near the sliding chamber of composite valve seat, main valve plug is the thinner rod component in thick stage casing, two ends, the main valve plug front end passes the close linked hole that is arranged on movingly of composite valve seat center hole liquid towards the control valve pocket and offsets with the control spool, rear end liquid is close to be arranged in the main valve core retainer plate front end movingly, and is provided with the conical surface that matches with valve port and constitutes described sealing surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203001345U CN201155499Y (en) | 2008-01-24 | 2008-01-24 | Engineering machinery one-way balance valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203001345U CN201155499Y (en) | 2008-01-24 | 2008-01-24 | Engineering machinery one-way balance valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201155499Y true CN201155499Y (en) | 2008-11-26 |
Family
ID=40103282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008203001345U Expired - Lifetime CN201155499Y (en) | 2008-01-24 | 2008-01-24 | Engineering machinery one-way balance valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201155499Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470815A (en) * | 2013-09-30 | 2013-12-25 | 常德中联重科液压有限公司 | Balance valve |
| CN108019391A (en) * | 2017-12-08 | 2018-05-11 | 重庆红江机械有限责任公司 | A kind of board-like damping adjustable one-way balance valve of connection |
-
2008
- 2008-01-24 CN CNU2008203001345U patent/CN201155499Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470815A (en) * | 2013-09-30 | 2013-12-25 | 常德中联重科液压有限公司 | Balance valve |
| CN108019391A (en) * | 2017-12-08 | 2018-05-11 | 重庆红江机械有限责任公司 | A kind of board-like damping adjustable one-way balance valve of connection |
| CN108019391B (en) * | 2017-12-08 | 2019-12-13 | 重庆红江机械有限责任公司 | Plate-type connected damping-adjustable one-way balance valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081126 |