CN208870861U - Switching valve, telescoping boom and crane - Google Patents
Switching valve, telescoping boom and crane Download PDFInfo
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- CN208870861U CN208870861U CN201821357914.3U CN201821357914U CN208870861U CN 208870861 U CN208870861 U CN 208870861U CN 201821357914 U CN201821357914 U CN 201821357914U CN 208870861 U CN208870861 U CN 208870861U
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Abstract
The utility model relates to a kind of switching valve, telescoping boom and cranes.Wherein, which includes switching valve body, and switching valve body includes: to control oily oil inlet passage, control oil circuit, drain path, the first reversal valve and the second reversal valve.Wherein, oily oil inlet passage is controlled to be connected with the first reversal valve；Control oil circuit is connected with the first reversal valve；Drain path is connected with the first reversal valve and the second reversal valve respectively；First reversal valve controls oily oil inlet passage and control oil circuit for connection in the operating condition, and the second reversal valve is commutated；And connection controls oil circuit and drain path in a non-operative state；Second reversal valve includes draining chamber, and draining chamber is connected to drain path.It by the utility model, solves the technical issues of how realizing compact-sized switching valve, saves piping connection, independent functional unit can be formed, reduce leakage point, improve integrated level, reduces volume, installation space is saved, installation effectiveness is improved, is also easily accessible for service.
Description
Technical field
The utility model relates to technical field of hydraulic pressure, more particularly to a kind of switching valve, telescoping boom and crane.
Background technique
As the continuous development of China's engineering machinery field is grown, meanwhile, under the impact of advanced foreign technology, Yong Huhe
Requirement of the host unit to vehicle hydraulic system is also just higher and higher.
The outer dimension of existing switching valve is huger, moreover, usually being formed by assembly, cannot be formed independent
Functional unit, to cause not compact enough in structure.This not compact structure can bring very big difficulty to batch production, very
It is unstable to the performance that will lead to the product produced.
Therefore it provides the technical issues of a kind of compact-sized switching valve is urgent need to resolve.
Summary of the invention
The technical issues of the utility model solves is to provide a kind of switching valve, telescoping boom and crane, with solve how
Realize compact-sized technical problem.
To achieve the goals above, according to the present utility model in a first aspect, the following technical schemes are provided:
A kind of switching valve, including switch valve body (1), the switching valve body 1 includes:
Oily oil inlet passage (2) is controlled, is connected with first reversal valve (3)；
It controls oil circuit (4), is connected with first reversal valve (3)；
Drain path (5) is connected with first reversal valve (3) and the second reversal valve (6) respectively；
First reversal valve (3), for being connected to the oily oil inlet passage (2) of the control and the control oil circuit in the operating condition
(4), and second reversal valve (6) is commutated；And be connected in a non-operative state the control oil circuit (4) with
The drain path (5)；
Second reversal valve (6), including draining chamber (61), the draining chamber (61) are connected to the drain path (5).
Further, second reversal valve (6) includes the second reversing valve core (62), oil suction chamber (63), the first working oil
Chamber (64), the second working oil chamber (65), the first oil back chamber (66), the second oil back chamber (67)；Wherein, the draining chamber (61),
One oil back chamber (66), the first working oil chamber (64), oil suction chamber (63), the second working oil chamber (65), the second oil back chamber (67) are successively
It is connected；Second reversing valve core (62) is connected with the control oil circuit (4), and for realizing: first working oil chamber
(64) it commutates between the oil suction chamber (63) and first oil back chamber (66), correspondingly, second working oil chamber
(65) it commutates between the oil suction chamber (63) and second oil back chamber (67).
Further, the switching valve further includes oil return opening (68)；In second oil back chamber (67) and the oil return opening
(68) one-way overflow valve (7) are provided between.
Further, the one-way overflow valve (7) uses screw thread inserting type structure, and by valve block (8), is mounted on described
Switch on valve body (1).
Further, in the oil inlet passage (2), alternatively, in the oil inlet passage (2) and first reversal valve
(3) damper (9) are provided between.
Further, cover board (10) are provided between first reversal valve (3) and second reversal valve (6)；Institute
Oil inlet passage (2), the damper (9) and the control oil circuit (4) is stated to be arranged in the cover board (10).
Further, one end of the draining chamber (61) is provided with end cap (11).
Further, first reversal valve (3) includes the first reversing valve core (31) and oil circuit (32), the oil circuit (32)
Including the first oil circuit (321), the second oil circuit (322), third oil circuit (323) and the 4th oil circuit (324)；Wherein:
First reversing valve core (31), respectively with first oil circuit (321), second oil circuit (322), described
Three oil circuits (323) are connected with the 4th oil circuit (324)；
First oil circuit (321), is also connected with the drain path (5)；
Second oil circuit (322) is also connected with the control oil circuit (4)；
The third oil circuit (323), is also connected with the oil inlet passage (2)；
4th oil circuit (324) is also connected with the cover board (10).
To achieve the goals above, second aspect according to the present utility model, and also the following technical schemes are provided:
A kind of telescoping boom, including switching valve described in the utility model first aspect.
To achieve the goals above, the third aspect according to the present utility model, and also the following technical schemes are provided:
A kind of crane, including telescoping boom described in the utility model second aspect.
The utility model embodiment provides a kind of switching valve, telescoping boom and crane.Wherein, which includes switching
Valve body, switching valve body include: to control oily oil inlet passage, control oil circuit, drain path, the first reversal valve and the second commutation
Valve.Wherein, oil inlet passage is connected with the first reversal valve；Control oil circuit is connected with the first reversal valve；Drain path is respectively with first
Reversal valve and the second reversal valve are connected；First reversal valve controls oily oil inlet passage and control oil for connection in the operating condition
Road, and the second reversal valve is commutated；And connection controls oil circuit and drain path in a non-operative state；Second changes
It include draining chamber to valve, draining chamber is connected to drain path.
The utility model is by taking above-mentioned technical proposal, using oil inlet passage and control oil circuit, and passes through the first commutation
The commutation of valve, so that the second reversal valve commutates.In this process, the draining chamber of the second reversal valve is carried out by drain path
Draining；And the drain path is also in the control oil circuit progress draining in the case of off working state to the first reversal valve；To
The draining that the draining chamber of control oil circuit and the second reversal valve is realized by drain path, saves piping connection, so as to
So that the structure of switching valve is more compact, independent functional unit can be formed, reduces leakage point, improves integrated level, reduce
Outer dimension, reduces volume, saves installation space, improve installation effectiveness, be also easily accessible for service, reduce costs.
The above description is merely an outline of the technical solution of the present invention, in order to better understand the technology of the utility model
Means, and being implemented in accordance with the contents of the specification, and to allow the above and other purpose of the utility model, feature and excellent
Point can be more clearly understood, special below to lift preferred embodiment, and cooperate attached drawing, and detailed description are as follows.
Detailed description of the invention
Fig. 1 is the structural schematic diagram according to the switching valve of the utility model one embodiment；
Fig. 2 is the one-way overflow valve schematic view of the mounting position according to the utility model one embodiment；
Fig. 3 is the conspectus according to the switching valve of the utility model one embodiment；
Fig. 4 is to be illustrated according to the cutting of the switching valve body internal oil channel on the left of the cover board of the utility model one embodiment
Figure.
Specific embodiment
Illustrate the embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this theory
Content disclosed by bright book understands other advantages and effect of the utility model easily.Obviously, described embodiment is only
It is the utility model a part of the embodiment, instead of all the embodiments.The utility model can also pass through in addition different tools
Body embodiment is embodied or practiced, and the various details in this specification can also not had based on different viewpoints and application
Various modifications or alterations are carried out under the spirit of the utility model.It should be noted that in the absence of conflict, implementing below
Feature in example and embodiment can be combined with each other.Based on the embodiments of the present invention, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, is fallen within the protection scope of the utility model.
It should also be noted that, diagram provided in following embodiment only illustrates the base of the utility model in a schematic way
This conception, only show in schema with related component in the utility model rather than component count, shape when according to actual implementation
And size is drawn, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its assembly layout
Kenel may also be increasingly complex.
In addition, in the following description, providing detail is for the ease of understanding thoroughly embodiment.However, fields
The skilled person will understand that, the aspect can be practiced without these specific details.
It is described in detail below with reference to Fig. 1-4 pairs of the utility model.Wherein, Fig. 1 schematically illustrates switching valve
Structural schematic diagram.Fig. 2 schematically illustrates one-way overflow valve schematic view of the mounting position.Fig. 3 schematically illustrates switching valve
Conspectus, wherein chain-dotted line indicates that switching valve is whole.Fig. 4 schematically illustrates the switching valve body on the left of cover board
The cut-away illustration of internal oil channel.
In order to realize compact structure, the utility model provides a kind of switching valve.The switching valve mainly includes switching valve sheet
Body 1.The switching valve body 1 includes: to control oily oil inlet passage 2, the first reversal valve 3, control oil circuit 4, drain path 5 and the
Two reversal valves 6.Wherein, oil inlet passage 2 is connected with the first reversal valve 3.Control oil circuit 4 is connected with the first reversal valve 3.Drain path
5 are connected with the first reversal valve 3 and the second reversal valve 6 respectively.First reversal valve 3 controls oily oil inlet for connection in the operating condition
Channel 2 and control oil circuit 4, and the second reversal valve 6 is commutated；And in a non-operative state connection control oil circuit 4 with
Drain path 5.Second reversal valve 6 includes draining chamber 61, which is connected to drain path 5.
Wherein, the first reversal valve 3 and the second reversal valve 6 are originally practical such as can be for solenoid directional control valve, hydraulic directional valve
It is novel that this is not construed as limiting.
In practical applications, above-mentioned draining chamber 61 can be spring cavity.The draining chamber 61 can connect with drain path 5 always
It is logical.Because draining is a slow process, and pipeline is thinner, in practical applications, if the second reversal valve 6 commutation frequency
It is numerous, then may this draining also do not complete just carry out next time commutation.Therefore, such case can be considered as to draining chamber 61
Always or always it is in draining state.
In the present embodiment, using the oily oil inlet passage 2 of control and control oil circuit 4, and pass through the commutation of the first reversal valve 3,
So that the second reversal valve 6 commutates.In this process, the draining chamber 61 of the second reversal valve 6 is let out by drain path 5
Oil；And the drain path 5 is also in the progress draining of control oil circuit 4 in the case of off working state to the first reversal valve 3；To
The draining of the draining chamber 61 of control oil circuit 4 and the second reversal valve 6 is realized by drain path 5.It is more with passing through in the prior art
The mode that a drain path carries out draining is compared, and piping connection is saved, so that the structure of switching valve is more compact,
Independent functional unit can be formed, reduces leakage point, improves integrated level, reduce outer dimension, reduce volume, save
Installation space, improves installation effectiveness, is also easily accessible for service, reduce costs.
As a preferred embodiment, as shown in Figure 1, the second reversal valve 6 also specifically includes: the second reversing valve core 62,
Oil suction chamber 63, the first working oil chamber 64, the second working oil chamber 65, the first oil back chamber 66 and the second oil back chamber 67.Wherein, draining chamber
61, the first oil back chamber 66, the first working oil chamber 64, oil suction chamber 63, the second working oil chamber 65, the second oil back chamber 67 are sequentially connected；
Second reversing valve core 62 is connected with control oil circuit 4, and for realizing: the first working oil chamber 64 is in oil suction chamber 63 and the first oil back chamber
It commutates between 66, correspondingly, the second working oil chamber 65 commutates between oil suction chamber 63 and the second oil back chamber 67.
In the present embodiment, the two sides of oil suction chamber 63 are arranged in the first working oil chamber 64 and the second working oil chamber 65.First
Oil back chamber 66, the second oil back chamber 67 are separately positioned on the outside of the first working oil chamber 64, the second working oil chamber 65 (that is: such as Fig. 1 institute
Show, the left side of the first working oil chamber 64 is arranged in the first oil back chamber 66；The second working oil chamber 65 is arranged in second oil back chamber 67
Right side.).The left side of the first oil back chamber 66 is arranged in draining chamber 61.
Above-mentioned first oil back chamber 66 can be communicated with the second oil back chamber 67 in switching valve body 1 by internal oil passages, and
And it can also be connected simultaneously with one-way overflow valve 7.
As shown in Figure 1, being provided with spring 12 in the draining chamber 61 of the second reversal valve 6.The spring is preferably compression spring.It should
Spring 12 is used to apply pressure to second reversing valve core 62, to be allowed at above-mentioned second reversing valve core 62 commutation to left end
It resets.
As an example, in the specific implementation process, by the way that the second reversing valve core 62 is connected with control oil circuit 4, working as control
When oil circuit 4 is connected to oil inlet passage 2, the oil liquid inputted through oil inlet passage 2 flow to control oil circuit 4, and then can reach second and change
To the right end of spool 62.The oil liquid can push second reversal valve to the effect of the end applied force of second reversing valve core 62
Core 62 commutates.Specifically, which may be implemented to commutate as follows: (1) oil suction chamber 63 and the first working oil
Chamber 64 is connected to, and correspondingly, the second working oil chamber 65 is connected to the second oil back chamber 67；(2) oil suction chamber 63 and the second working oil chamber 65
Connection, correspondingly, the first working oil chamber 64 ends obstructed with the first oil back chamber 66 or the second oil back chamber 67.
As a preferred embodiment, as shown in Fig. 2, the switching valve can also include oil return opening 68；In the second oil return
One-way overflow valve 7 is provided between chamber 67 and oil return opening 68.
Wherein, which can be composed by check valve and overflow valve.Wherein, in one direction, lead to
It crosses check valve and realizes straight-through effect；In the other directions, check valve is reversed, and obstructed effect is realized by overflow valve.
The normal position of one-way overflow valve 7 is in off state.It in a particular application, can be default for the one-way overflow valve 7 setting
Pressure value (such as 5MPa).When the actuator (not shown) pressure of the second reversal valve 6 is more than the preset pressure value, this is unidirectional excessive
Stream valve 7 can be opened, i.e. oil liquid in the first oil back chamber 66 or the second oil back chamber 67 flows to oil return opening 68, and then flows back to fuel tank.
In a preferred embodiment, as shown in Fig. 2, the one-way overflow valve 7 uses screw thread inserting type structure, and lead to
Valve block 8 is crossed, is mounted on switching valve body 1.
Wherein, by using thread cartridge structure, the volume of switching valve can be further decreased, the utility model is provided
Switching valve it is more compact, and be also easily accessible for service.
In a preferred embodiment, in oil inlet passage 2, alternatively, between oil inlet passage 2 and the first reversal valve 3
It is provided with damper 9.
Above-mentioned damper 9 for example can be the damper that diameter is 1.2 millimeters.
By using above-mentioned damper 9, the flowing velocity of the oil liquid entered by oil inlet passage 2, Jin Erke can control
To control the commutating speed of the first reversal valve 3, to can reduce oil cylinder in practical applications because of pressure caused by quick movement
Power impact.
In a preferred embodiment, cover board 10 is provided between the first reversal valve 3 and the second reversal valve 6；Oil inlet
Channel 2, damper 9 and control oil circuit 4 are arranged in cover board 10.
Wherein, the first reversal valve 3 and the second reversing valve core 62 are connected by the cover board 10, and junction can also lead to
Cross the sealing of sealing ring further progress.
In a preferred embodiment, one end of draining chamber 61 is provided with end cap 11.
Referring to Fig.1, end cap 11 can be set in the left side of draining chamber 61.The end cap 11 can be with spring 12 in draining chamber 61
One end mutually fix, and sealing can also be played the role of
In a preferred embodiment, the first reversal valve 3 includes the first reversing valve core 31 and oil circuit 32, and oil circuit 32 includes
First oil circuit 321, the second oil circuit 322, third oil circuit 323 and the 4th oil circuit 324；Wherein, the first reversing valve core 31 is respectively with
One oil circuit 321, the second oil circuit 322, third oil circuit 323 are connected with the 4th oil circuit 324；First oil circuit 321 also with 5 phase of drain path
Even；Second oil circuit 322 is also connected with control oil circuit 4；Third oil circuit 323 is also connected with oil inlet passage 2；4th oil circuit 324 also with
Cover board 10 is connected.
In the present embodiment, the first reversing valve core 31 is for realizing the first oil circuit 321, the second oil circuit 322, third oil circuit
323 and the 4th switching between oil circuit 324.In practical applications, the first reversing valve core 31 can be used to realize the road of control oil
Diameter switching.
In specific implementation, blind hole is provided on cover board 10.4th oil circuit 324 can be connected with the blind hole.
It is former with work of the specific embodiment to the first reversal valve for the ease of understanding the utility model, below with reference to Fig. 1-4
Reason is described in detail.Wherein, be solenoid directional control valve with the first reversal valve 3, the second reversal valve 6 is hydraulic directional valve, work is situated between
Matter be oil liquid for be described in detail.
When the electromagnet 13 of the first reversal valve 3 must not be electric, the first reversal valve 3 is in off working state.At this point, oil inlet is logical
Road 2 is connected to third oil circuit 323, and is communicated by the first reversing valve core 31 with the 4th oil circuit 324.The one of 4th oil circuit 324
The blind hole being connected on cover board 10 is held, i.e. the 4th oil circuit 324 is ended.At the same time, oil circuit 4 and the second oil circuit 322 are controlled
It communicates, and is communicated by the first reversing valve core 31 with the first oil circuit 321.First oil circuit 321 is communicated with drain path 5 again, from
And the connection of control oil circuit 4 and drain path 5 is realized, it is possible thereby to realize the draining of oil liquid in control oil circuit 4.Referring to Fig. 3,
The draining path S1 of control oil circuit 4 is shown.It should be noted that in practical applications, at this point, the second reversal valve 6
Draining chamber 61 is also communicated with drain path 5, so, which can also carry out draining.Referring to Fig. 3, it is shown and lets out
The draining path S2 of oil pocket 61.
When the electromagnet 13 of the first reversal valve 3 must be electric, the first reversal valve 3 is in running order, first reversing valve core
31 move downward, and commutate.At this point, oil inlet passage 2 is connected to the second oil circuit 322.Second oil circuit 322 again with control oil circuit
4 communicate.So the oil inlet passage 2 is connected to control oil circuit 4, oil liquid can flow to control oil circuit 4 through oil inlet passage 2 as a result,.It should
Control oil circuit 4 is connected with the second reversing valve core 62.The oil liquid for reaching control oil circuit 4 pushes second reversing valve core 62 to transport to the left
It is dynamic, it commutates.Under the working condition, the 4th oil circuit 324 is connected to the first oil circuit 321.First oil circuit 321 is again logical with draining
Road connection.So the 4th oil circuit 324 is connected to drain path 5.
For the ease of further understanding the utility model, below with reference to Fig. 1-4, second is described in detail with specific embodiment
The working principle of reversal valve.Wherein, be solenoid directional control valve with the first reversal valve 3, the second reversal valve 6 is hydraulic directional valve, work
Medium be oil liquid for be described in detail.
When the electromagnet 13 of the first reversal valve 3 must not be electric, it is in off working state, the second reversing valve core 62 is in normal
Position.At this point, oil suction chamber 63 is connected to the first working oil chamber 64；Oil liquid enters oil suction chamber 63 by oil inlet, and flows to the first work
Make oil pocket 64, to actuator (not shown) in the second reversal valve 6 corresponding hydraulic fluid port is connected first working oil chamber 64.This second is changed
Into valve 62, another hydraulic fluid port of actuator is connected with the second working oil chamber 65, and is connected to second time by the second reversing valve core 62
Oil pocket 67.End between oil suction chamber 63 and the second working oil chamber 65, oil liquid is obstructed.Oil liquid in second working oil chamber 65 flows to
Two oil back chambers 67.Oil liquid in second oil back chamber 67 flows back to fuel tank by oil return opening 68.Wherein, the first oil back chamber 66 and second time
Oil pocket 67 is (as shown in Figure 4) communicated.
It is in running order when the electromagnet 13 of the first reversal valve 3 must be electric.Second reversing valve core 62 by from control oil circuit
4, which are conducted through the pressure come, pushes, and moves downward, commutates.By the commutation, oil suction chamber 63 and the second working oil chamber 65 connect
It is logical, so that oil liquid flows to the second working oil chamber 65 by oil suction chamber 63；Between oil suction chamber 63 and the first working oil chamber 64
Path cut-off, oil liquid are obstructed.Path cut-off between first working oil chamber 64 and the first oil back chamber 66 or the second oil back chamber 67, oil
Liquid is obstructed；At this point, the second reversal valve 6 is discharged by drain path 5 in the oil liquid in draining chamber 61, such as S2 institute in draining path in Fig. 3
Show.
In conclusion in switching valve provided by the utility model, when the electromagnet 13 of the first reversal valve 3 must not be electric,
First reversing valve core 31 is in normal position, without movement, by oil inlet passage 2, through damper 9, then to the first reversing valve core 31
Path cut-off.Drain path 5 is communicated by the first reversing valve core 31 with control oil circuit 4.Draining chamber 61 and control oil circuit 4 are in
Draining state.At this point, the oil liquid flows to the first working oil chamber 64 by oil suction chamber 63 if being passed through oil liquid to oil suction chamber 63；
Second working oil chamber 65 is connected to the second oil back chamber 67.If there are oil liquid in the second working oil chamber 65, which can be through
Two oil back chambers 67, one-way overflow valve 7 (overcoming pressure set by one-way overflow valve 7) flow back into fuel tank (not shown).Second changes
Oil liquid into the draining chamber 61 of valve 6 carries out draining by drain path 5, and the second reversing valve core 62 is discharged in oil liquid.When first
When the electromagnet 13 of reversal valve 3 is powered, oil liquid can through oil inlet passage 2, damper, until the first reversing valve core 31, and this
Under the action of the commutation of one reversing valve core 31, it is flow to control oil circuit 4, and to 62 applied force of the second reversing valve core, pushes the second commutation
Spool 62 is moved to the left, and is commutated, so that oil liquid flows to the second working oil chamber 65 by oil suction chamber 63, and first works
Oil pocket 64 and the second oil back chamber 67 end, and oil liquid stream is obstructed.When the second reversing valve core 62 is moved to the left, draining chamber 61 can be made
In oil liquid by drain path 5 carry out draining, by oil liquid be discharged the second reversal valve 6.When 13 power loss again of electromagnet, second is changed
It is resetted to spool 62 by the power that the spring in draining chamber 61 is applied.Therefore, switching valve provided by the utility model, benefit
With oil inlet passage and oil circuit is controlled, and passes through the commutation of the first reversal valve, so that the second reversal valve commutates.In the process
In, the draining chamber of the second reversal valve carries out draining by drain path；And the drain path is also in non-to the first reversal valve
Control oil circuit under operating condition carries out draining；Oil circuit and the second reversal valve are controlled to realize by drain path
The draining of draining chamber, saves piping connection, so that the structure of switching valve is more compact, can form independent function
Unit reduces leakage point, improves integrated level, reduces outer dimension, reduces volume, saves installation space, improves
Installation effectiveness, is also easily accessible for service, reduces costs.
For indicating the term of positional relationship applied in above-mentioned any technical solution disclosed by the utility model, except another
There is statement outer, meaning includes approximate with its, similar or close state.Either component provided by the utility model either
Assembled by multiple individual component parts, or the separate part that integrally formed technique manufactures.
It should be noted that the terms "include", "comprise" or other any variants are intended to cover non-exclusive inclusion,
So that including the commodity of a series of elements or which element is system not only include, but also including being not explicitly listed
Other element, or further include for this commodity or the intrinsic element of system.In the absence of more restrictions, by
The element that sentence "including a ..." limits, it is not excluded that there is also in addition in the commodity or system for including the element
Identical element.
It should be noted that for sake of simplicity, describing embodiment herein by relevant mode.Above-mentioned each
In embodiment, identical content is omitted, and the content distinguished between each embodiment is described in detail.Those skilled in the art
It will be understood that can mutually be used for reference between above-mentioned each embodiment.
The feature and advantage described in the description are not included, and specifically, many supplementary features and advantage will
In view of attached drawing, description and claims and it is clear by those of ordinary skill in the art.Further, it should be noted that in the description
The language used is selected primarily for readable and guidance purpose, and can it is unselected for defining or
Person limits subject matter content.
The above descriptions are merely preferred embodiments of the present invention, not does in any form to the utility model
Limitation be not intended to limit the utility model although the utility model has been disclosed with preferred embodiment as above, it is any ripe
Professional and technical personnel is known, is not being departed within the scope of technical solutions of the utility model, when in the technology using the disclosure above
Hold the equivalent embodiment for being modified or being modified to equivalent variations, but all without departing from technical solutions of the utility model
Hold, according to the technical essence of the utility model any simple modification, equivalent change and modification made to the above embodiment, still
It is within the scope of the technical solutions of the present invention.
Claims (10)
1. a kind of switching valve, which is characterized in that including switching valve body (1), the switching valve body (1) includes:
Oily oil inlet passage (2) is controlled, is connected with the first reversal valve (3)；
It controls oil circuit (4), is connected with first reversal valve (3)；
Drain path (5) is connected with first reversal valve (3) and the second reversal valve (6) respectively；
First reversal valve (3), for being connected to the oily oil inlet passage (2) of the control and the control oil circuit in the operating condition
(4), and second reversal valve (6) is commutated；And be connected in a non-operative state the control oil circuit (4) with
The drain path (5)；
Second reversal valve (6), including draining chamber (61), the draining chamber (61) are connected to the drain path (5).
2. switching valve according to claim 1, which is characterized in that second reversal valve (6) includes the second reversing valve core
(62), oil suction chamber (63), the first working oil chamber (64), the second working oil chamber (65), the first oil back chamber (66), the second oil back chamber
(67)；Wherein, the draining chamber (61), the first oil back chamber (66), the first working oil chamber (64), oil suction chamber (63), the second work
Oil pocket (65), the second oil back chamber (67) are sequentially connected；Second reversing valve core (62) is connected with the control oil circuit (4), and
For realizing: first working oil chamber (64) is changed between the oil suction chamber (63) and first oil back chamber (66)
To correspondingly, second working oil chamber (65) is changed between the oil suction chamber (63) and second oil back chamber (67)
To.
3. switching valve according to claim 2, which is characterized in that the switching valve further includes oil return opening (68)；Described
One-way overflow valve (7) are provided between second oil back chamber (67) and the oil return opening (68).
4. switching valve according to claim 3, which is characterized in that the one-way overflow valve (7) uses screw thread inserting type knot
Structure, and by valve block (8), it is mounted on the switching valve body (1).
5. switching valve according to claim 1, which is characterized in that in the oil inlet passage (2), alternatively, it is described into
Damper (9) are provided between oily channel (2) and first reversal valve (3).
6. switching valve according to claim 5, which is characterized in that in first reversal valve (3) and second commutation
Cover board (10) are provided between valve (6)；The oil inlet passage (2), the damper (9) and the control oil circuit (4) setting exist
In the cover board (10).
7. switching valve according to claim 2, which is characterized in that one end of the draining chamber (61) is provided with end cap
(11)。
8. switching valve according to claim 6, which is characterized in that first reversal valve (3) includes the first reversing valve core
(31) and oil circuit (32), the oil circuit (32) includes the first oil circuit (321), the second oil circuit (322), third oil circuit (323) and the
Four oil circuits (324)；Wherein:
First reversing valve core (31) is oily with first oil circuit (321), second oil circuit (322), the third respectively
Road (323) is connected with the 4th oil circuit (324)；
First oil circuit (321), is also connected with the drain path (5)；
Second oil circuit (322) is also connected with the control oil circuit (4)；
The third oil circuit (323), is also connected with the oil inlet passage (2)；
4th oil circuit (324) is also connected with the cover board (10).
9. a kind of telescoping boom, which is characterized in that including switching valve described in any one of claims 1-8.
10. a kind of crane, which is characterized in that including telescoping boom as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821357914.3U CN208870861U (en) | 2018-08-22 | 2018-08-22 | Switching valve, telescoping boom and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821357914.3U CN208870861U (en) | 2018-08-22 | 2018-08-22 | Switching valve, telescoping boom and crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208870861U true CN208870861U (en) | 2019-05-17 |
Family
ID=66465370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821357914.3U Active CN208870861U (en) | 2018-08-22 | 2018-08-22 | Switching valve, telescoping boom and crane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110759241A (en) * | 2019-10-29 | 2020-02-07 | 三一汽车起重机械有限公司 | Hydraulic switching control system and crane |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110759241A (en) * | 2019-10-29 | 2020-02-07 | 三一汽车起重机械有限公司 | Hydraulic switching control system and crane |
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