CN206988212U - A kind of balanced valve suitable for crane amplitude variation oil cylinder - Google Patents
A kind of balanced valve suitable for crane amplitude variation oil cylinder Download PDFInfo
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- CN206988212U CN206988212U CN201720921753.5U CN201720921753U CN206988212U CN 206988212 U CN206988212 U CN 206988212U CN 201720921753 U CN201720921753 U CN 201720921753U CN 206988212 U CN206988212 U CN 206988212U
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- hydraulic fluid
- oil cylinder
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Abstract
A kind of balanced valve suitable for crane amplitude variation oil cylinder.Solve the problems, such as existing crane balanced valve poor safety performance, balance quality difference in practical work process.It includes valve body, described valve body is provided with first passage, second channel, first logical hydraulic fluid port, second logical hydraulic fluid port, control chamber with connect chamber, control piston is provided with described control chamber, described connection intracavitary is provided with valve element, described valve element includes the first sealing and the second sealing, the first described sealing and the second sealing are separated out logical oil pocket by chamber is connected, the pressure for leading to oil pocket suffered by described the first sealing and the second sealing is identical, described valve element has the first position and the second place for make it that logical oil pocket is connected with the second logical hydraulic fluid port is opened by control piston for causing that logical oil pocket is spaced with the second logical hydraulic fluid port during installation.The advantages that the utility model also has simple in construction, easy to assembly, reliable in action, and service life is long.
Description
Technical field
It the utility model is related to a kind of crane hydraulic control system, and in particular to one kind is applied to crane amplitude variation oil cylinder
Balanced valve.
Background technology
Telescopic arm crane has following action：Elevator, luffing, flexible and revolution.Elevator and revolution are made using motor
For executive component, luffing uses oil cylinder as executive component with flexible.From the concrete principle of crane, crane passes through volume
Raise mechanism to sling weight, selection elsewhere puts down weight, is also required to stretch in addition, amplitude oil cylinder flexible adjustment weight
Far and near and height.Luffing is vital as one of one main action of crane its security, is directly connected to life
Life and property safety.Therefore in order to ensure security, it would be desirable to a balanced valve is set in amplitude oil cylinder, to ensure to become
The security of width.When setting up another heavy-duty machine and doing luffing action, when large arm and ground angle are less and less, by the shadow of acceleration of gravity
Ring, load is increasing, and derricking speed can be increasingly faster, even results in stall and causes accident so that product safety performance is poor.
The content of the invention
To solve existing crane balanced valve poor safety performance, balance quality in practical work process in background technology
The problem of poor, the utility model provide a kind of balanced valve suitable for crane amplitude variation oil cylinder.
The technical solution of the utility model is：A kind of balanced valve suitable for crane amplitude variation oil cylinder, including valve body, it is described
Valve body be provided with first passage, second channel, the first logical hydraulic fluid port, the second logical hydraulic fluid port, control chamber and connect chamber, described first
Logical hydraulic fluid port is connected with first passage, and control piston, the described second logical hydraulic fluid port and second channel are provided with described control chamber
It is connected, described connection intracavitary is provided with valve element, and described valve element includes the first sealing and the second sealing, and described first
Sealing, the second sealing are connected by link rod part, and the first described sealing and the second sealing are separated out chamber is connected
Logical oil pocket, is connected between described first passage and second channel, and described first passage is connected with logical oil pocket, and described the
The pressure of logical oil pocket is identical suffered by one sealing and the second sealing, and described valve element causes logical oil pocket and second when having installation
The first position and the second place for make it that logical oil pocket is connected with the second logical hydraulic fluid port is opened by control piston that logical hydraulic fluid port is spaced.
As a kind of improvement of the present utility model, the first described sealing and the second sealing are cylinder, and the
The diameter of one sealing and the second sealing is identical.
As further improvement of the utility model, at least provided with a throttling channel on the second described sealing.
As further improvement of the utility model, the first valve pocket is arranged with outside the second described sealing.
As further improvement of the utility model, the first described valve pocket is provided with clearance groove.
As further improvement of the utility model, described valve element is provided with pushing part, described valve body be provided with
The adjusting part that pushing part offsets for adjusting spool Opening pressure.
As further improvement of the utility model, described control control piston is located at the both ends of valve element with adjusting part
And offseted with valve element.
As further improvement of the utility model, check valve is provided between described first passage and second channel.
As further improvement of the utility model, described valve body is provided with oil return opening, and described second channel is with returning
The overload overflow valve for being used for overload pressure protection is provided between hydraulic fluid port,
The beneficial effects of the utility model are that valve element is provided with valve body, and the first sealing and are set on valve element
Two sealings, and make it that the pressure for leading to oil pocket suffered by the first sealing and the second sealing is identical, homalographic spool design, valve element
Aperture area is controllable, ensure that the stationarity that amplitude oil cylinder declines.The utility model also have it is simple in construction, it is easy to assembly, move
The advantages that work is reliable, and service life is long.
Brief description of the drawings
Accompanying drawing 1 is the structural representation of the utility model embodiment.
Accompanying drawing 2 is the hydraulic schematic diagram of the utility model embodiment.
Accompanying drawing 3 is balanced valve pressure and the graph of a relation of oil return opening flow in the utility model embodiment work.
In figure, 1, valve body；11st, control chamber；12nd, chamber is connected；13rd, oil pocket is led to；2nd, piston is controlled；3rd, valve element；31st, first is close
Envelope portion；32nd, the second sealing；33rd, link rod part；34th, throttling channel；35th, pushing part；4th, the first valve pocket；41st, clearance groove；5th, adjust
Component；6th, check valve；7th, overflow valve is overloaded；A, first passage；B, second channel；V1, the first logical hydraulic fluid port；V2, the second logical oil
Mouthful；T, oil return opening.
Embodiment
The utility model embodiment is described further below in conjunction with the accompanying drawings：
As shown in Fig. 1 combination accompanying drawings 2-3, a kind of balanced valve suitable for crane amplitude variation oil cylinder, including valve body 1, it is described
Valve body be provided with first passage A, second channel B, the first logical hydraulic fluid port V1, the second logical hydraulic fluid port V2, control chamber 11 and connect chamber 12,
The logical hydraulic fluid port of described first is connected with first passage, and control piston 2, the described second logical hydraulic fluid port are provided with described control chamber
It is connected with second channel, described connection intracavitary is provided with valve element 3, and described valve element includes the first sealing 31 and the second sealing
Portion 32, the first described sealing 31, the second sealing 32 are connected by link rod part 33, the first described sealing and second
Sealing is separated out logical oil pocket 13 by chamber is connected, and is connected between described first passage and second channel, described first passage
It is connected with logical oil pocket, the pressure of logical oil pocket is identical suffered by described the first sealing and the second sealing, described valve element tool
Have during installation so that first position that logical oil pocket is spaced with the second logical hydraulic fluid port and being opened by control piston to lead to oil pocket and the
The second place that two-way hydraulic fluid port is connected.The utility model is provided with valve element on valve body, and the first sealing is set on valve element
With the second sealing, and make it that the pressure for leading to oil pocket suffered by the first sealing and the second sealing is identical, valve element both ends stress surface
Product is equal, changes regardless of load, for the unlatching on valve element without influence, valve core opening area is controllable, ensure that amplitude oil cylinder
The stationarity of decline.The advantages that the utility model also has simple in construction, easy to assembly, reliable in action, and service life is long.
Described the first sealing and the second sealing is cylinder, and the diameter of the first sealing and the second sealing
It is identical.Homalographic spool design, change regardless of load, for the unlatching on valve element without influence, valve core opening area is controllable, protects
The stationarity of amplitude oil cylinder decline is demonstrate,proved.
At least provided with a throttling channel 34 on the second described sealing.Specifically, the second described sealing overcoat
Provided with the first valve pocket 4.Specifically, the first described valve pocket is provided with clearance groove 41.Such structure causes the control of product more
Reliably, valve element can be opened quickly.When being arranged on core and opening of throttling channel, it is anti-that fluid by meter in mode produces hydraulic power
Feedback, valve element is set, by hydraulic power repulsion, to ensure valve element in the case where load is bigger, valve port opening is in liquid in opening procedure
Tend to turn down under dynamic action, so as to reduce valve element by flow, slow down speed of being lain prone under arm, ensure safety.
Described valve element is provided with pushing part 35, and described valve body is provided with to offset with pushing part and opened for adjusting spool
The adjusting part 5 of pressure.Specifically, described control control piston with adjusting part located at the both ends of valve element and and valve element
Offset.The setting of adjusting part, valve element Opening pressure can be arranged as required to, so that the control of product is reliable.Described
Adjusting part includes adjusting screw and spring, and the pressure of spring is adjusted by adjusting screw, so as to the Opening pressure of adjusting spool.
Check valve 6 is provided between described first passage and second channel.Specifically, described valve body is provided with oil return
Mouth T, is provided with the overload overflow valve 7 for being used for overload pressure protection between described second channel and oil return opening.The setting of check valve
Play a part of reverse flow limiting, the setting for overloading overflow valve make it that product safety performance is higher.
Operation principle of the present utility model is：When luffing rises, fluid passes through second channel B, list from the second logical hydraulic fluid port V2
Enter first passage A to valve 6, the big chamber of amplitude oil cylinder is out entered by the first logical hydraulic fluid port V1, oil cylinder stretches out.When luffing falls, become
The big chamber fluid of width oil cylinder enters in balance valve body from the first logical hydraulic fluid port V1, while pilot control oil enters control chamber 11 from P mouths,
Promote control piston 2 to the right（Referring to accompanying drawing 1）Mobile, top valve opening core 3 opens the valve between the valve pocket 4 of valve element 3 and first toward moving right
Mouthful, the big chamber oil of oil cylinder enters second channel B from first passage A by the first logical hydraulic fluid port V1 by valve core opening throttling channel 34, by the
Two-way hydraulic fluid port V2 oil returns, amplitude oil cylinder are retracted, and are lain prone under large arm.Due to being influenceed by acceleration of gravity, crane large arm is lain prone under
During, liftoff angle is smaller, and load is bigger, and speed of being lain prone under large arm is faster, or even stall, and this is the process of a danger close.
Being caused the accident to prevent stall of being lain prone under large arm, this balanced valve is designed to homalographic at valve element load cavity position, the
The characteristics of diameter of one sealing and the second sealing is identical, and this is designed is equal for valve element both ends lifting surface area, no matter load is such as
What changes, and the unlatching on valve element is without influence.Throttling channel is designed with valve element, when core is opened, fluid passes through meter in
Mode produces force feedback of surging, and valve element, by hydraulic power repulsion, is ensured that valve element is loading bigger feelings in opening procedure
Under condition, valve port opening tends to turn down under hydraulic power effect, so as to reduce valve element by flow, slows down speed of being lain prone under arm, protects
Card safety.The curve map of balanced valve pressure and oil return opening flow is disclosed in accompanying drawing 3, it is gradual to be respectively indicated as load by wherein C, D
Increase balance valve flow is gradually reduced, and load is gradually reduced balance valve flow and gradually increased.
In the description of the invention, it is necessary to explanation, term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, thus it is it is not intended that right
The limitation of the present invention.In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint are relative
Importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.In addition, in the description of the invention, unless otherwise indicated, " multiple " are meant that two or two
More than.
Every technical staff's notice：Although the utility model describes according to above-mentioned embodiment, this
The invention thought of utility model is not limited to that utility model, any repacking with inventive concept, will all include this specially
In sharp scope of patent protection.
Claims (9)
1. a kind of balanced valve suitable for crane amplitude variation oil cylinder, including valve body, it is characterised in that:Described valve body is provided with the
One passage, second channel, the first logical hydraulic fluid port, the second logical hydraulic fluid port, control chamber are led to chamber, the described first logical hydraulic fluid port and first is connected
Road is connected, and control piston is provided with described control chamber, and the described second logical hydraulic fluid port is connected with second channel, described company
Valve element is provided with cavity, described valve element includes the first sealing and the second sealing, the first described sealing, the second sealing
Portion is connected by link rod part, and the first described sealing and the second sealing will connect chamber and be separated out logical oil pocket, and described the
It is connected between one passage and second channel, described first passage is connected with logical oil pocket, the first described sealing and second
The pressure of logical oil pocket is identical suffered by sealing, and described valve element, which has, causes logical oil pocket and second to lead to what hydraulic fluid port was spaced during installation
First position and being opened by control piston causes logical oil pocket to lead to the second place that hydraulic fluid port is connected with second.
A kind of 2. balanced valve suitable for crane amplitude variation oil cylinder according to claim 1, it is characterised in that described
One sealing and the second sealing are cylinder, and the diameter of the first sealing and the second sealing is identical.
A kind of 3. balanced valve suitable for crane amplitude variation oil cylinder according to claim 1, it is characterised in that described
At least provided with a throttling channel on two sealings.
A kind of 4. balanced valve suitable for crane amplitude variation oil cylinder according to claim 1, it is characterised in that described
The first valve pocket is arranged with outside two sealings.
A kind of 5. balanced valve suitable for crane amplitude variation oil cylinder according to claim 4, it is characterised in that described
One valve pocket is provided with clearance groove.
A kind of 6. balanced valve suitable for crane amplitude variation oil cylinder according to claim 1, it is characterised in that described valve
Core is provided with pushing part, and described valve body is provided with the adjusting part to be offseted with pushing part for adjusting spool Opening pressure.
A kind of 7. balanced valve suitable for crane amplitude variation oil cylinder according to claim 6, it is characterised in that described control
System control piston offsets located at the both ends of valve element and with valve element with adjusting part.
A kind of 8. balanced valve suitable for crane amplitude variation oil cylinder according to claim 1, it is characterised in that described
Check valve is provided between one passage and second channel.
A kind of 9. balanced valve suitable for crane amplitude variation oil cylinder according to claim 1, it is characterised in that described valve
Body is provided with oil return opening, and the overload overflow valve for being used for overload pressure protection is provided between described second channel and oil return opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720921753.5U CN206988212U (en) | 2017-07-27 | 2017-07-27 | A kind of balanced valve suitable for crane amplitude variation oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720921753.5U CN206988212U (en) | 2017-07-27 | 2017-07-27 | A kind of balanced valve suitable for crane amplitude variation oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206988212U true CN206988212U (en) | 2018-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720921753.5U Active CN206988212U (en) | 2017-07-27 | 2017-07-27 | A kind of balanced valve suitable for crane amplitude variation oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206988212U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111664136A (en) * | 2020-05-25 | 2020-09-15 | 圣邦集团有限公司 | Load compensation balance valve |
| CN111664136B (en) * | 2020-05-25 | 2024-04-19 | 圣邦集团有限公司 | Load compensation balance valve |
-
2017
- 2017-07-27 CN CN201720921753.5U patent/CN206988212U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111664136A (en) * | 2020-05-25 | 2020-09-15 | 圣邦集团有限公司 | Load compensation balance valve |
| CN111664136B (en) * | 2020-05-25 | 2024-04-19 | 圣邦集团有限公司 | Load compensation balance valve |
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