CN109073111A - Emergency operation valve and relief circuit - Google Patents
Emergency operation valve and relief circuit Download PDFInfo
- Publication number
- CN109073111A CN109073111A CN201780020907.6A CN201780020907A CN109073111A CN 109073111 A CN109073111 A CN 109073111A CN 201780020907 A CN201780020907 A CN 201780020907A CN 109073111 A CN109073111 A CN 109073111A
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- Prior art keywords
- valve
- emergency operation
- state
- circuit
- oil circuit
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/363—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a piston
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/20—Control systems or devices for non-electric drives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Automation & Control Theory (AREA)
- Fluid-Pressure Circuits (AREA)
- Component Parts Of Construction Machinery (AREA)
- Fluid-Driven Valves (AREA)
- Mechanically-Actuated Valves (AREA)
- Safety Valves (AREA)
Abstract
The present invention discloses a kind of emergency operation valve, can carry out selecting a switching between valve opening state and closed valve state, and emergency operation valve of the invention has: clack box, has the valve chamber of empty shape；First oil circuit is formed in clack box, and is the oil circuit of the working oil supplied to valve chamber；Second oil circuit is formed in clack box, and is the oil circuit of the working oil discharged from valve chamber；Compression zone is configured at valve chamber in the state of movable between the second position for making the first position of the first oil circuit and the second oil communication and cutting off the first oil circuit and the second oil circuit；And elastomeric element exerts a force to compression zone in the direction from the second position towards first position.
Description
Technical field
The present invention relates to a kind of emergency operation valve and relief circuits.More specifically, the present invention relates to a kind of automobile dresses
Emergency operation valve and relief circuit used in the hydraulic working machines such as load formula crane.
Background technique
Lorry loading formula crane tool is standby: the suspension hook under being hung from the top of crane arm by electric wire is passed through capstan winch
(winch) mechanical structure rolled, put down；With the hydraulic circuit driven to capstan winch.Also, it is licked by suspension hook
When, suspension hook or boom can generate damage, therefore the relief circuit for stopping capstan winch driving is provided in hydraulic circuit.Institute
The anti-of the suspension hook of meaning licks device, and constituting includes such relief circuit.
The composition of relief circuit by pressure reducing valve and is mounted on the pilot circuit of the pressure reducing valve as shown in Patent Documents 1 and 2
In electromagnetic opening and closing valve constitute.Such relief circuit is configured to, and passes through the attached of the pilot pressure that is carried out by the electromagnetic opening and closing valve
Add/release, working oil is unloaded or is loaded.
But the relief circuit of patent document 1,2 composition is anti-theft device, rather than anti-suspension hook licks device.
About the anti-relief circuit 100 for licking device for constituting the suspension hook in lorry loading formula crane, carried out referring to Fig. 7
Explanation.The working oil being discharged by hydraulic pump 101 is supplied to each hydraulic actuating mechanism by supplying oil circuit 102.On the other hand, from
The working oil of each hydraulic actuating mechanism discharge is back to container 104 by discharging oil circuit 103.
Pressure reducing valve 105 is installed between supply oil circuit 102 and discharge oil circuit 103.Pressure reducing valve 105, in the pressing of spring
When power and pilot pressure are adapted to, valve is closed, becomes the stress state that working oil flows in supply oil circuit 102.On the other hand,
Pressure reducing valve 105 opens valve when pilot pressure disappears.If pressure reducing valve 105 opens valve, become the work in supply oil circuit 102
Make the unloaded state that oil directly discharged rather than be supplied to each hydraulic actuating mechanism to discharge oil circuit 103.
In addition, being provided with the supply to pilot pressure, discharge carries out the electromagnetic opening and closing valve 106 of switching control.
The limit switch 109 detected to the pulleying of suspension hook is arranged in its boom top end part for lorry loading formula crane.
Limit switch 109 is placed in open position in the case where detecting the pulleying of suspension hook, by electromagnetic opening and closing valve 106 to avoid guide
Pressure.Then, pressure reducing valve 105 is opened, and the driving of Winch motor stops.
However, electromagnetic opening and closing valve 106 is maintained at by spring if the electrical system of the pulleying of detection suspension hook generates broken string
Valve opening state.Therefore, pressure reducing valve 105 also continues to keep valve opening state, can not start crane.
Thus, in the prior art, as shown in fig. 7, manually open and close valve 120 is used as emergency operation valve, with electromagnetic opening and closing valve
106 are installed in series.If emergency operation valve 120 closes valve, pressure reducing valve 105 is also switched off valve.Then, working oil be loaded to
Oil circuit 102 is supplied, crane just can be started.
However, existing emergency operation valve 120 is structure as shown in Figure 8.Pump side access is formed in clack box 121
122 and container side access 123.Valve is formed in the position for becoming the crossing between pump side access 122 and container side access 123
Room 124, and it is inserted into valve body 125.Valve body 125 be it is screw connected, be formed in clack box 121 internal screw thread 126 and valve body 125 it is outer
Threaded engagement.If being inserted into driver in the chase 127 that the head of valve body 125 is formed and being allowed to positive and reverse return and transfer make valve body 125
It retreats, then pump side access 122 can be made to be connected to or cut off with container side access 123.
If being screwed into valve body 125 in above-mentioned emergency operation valve 120, quilt between pump side access 122 and container side access 123
Cutting, can continue to pilot pressure to pressure reducing valve 105 shown in Fig. 7.But since emergency operation valve 120 is manual
Operation, thus as long as no in advance remember carry out release operation, Winch motor can operating condition can all continue.If Winch motor
Can operating condition continue, it is likely that because of the pulleying of suspension hook can generate damage.
[existing technical literature]
[patent document]
Patent document 1: Japanese Unexamined Patent Publication 2008-137454 bulletin
Patent document 2: Japanese Unexamined Patent Publication 2009-154740 bulletin
Summary of the invention
The present invention makes in view of the foregoing, and the emergency operation released will not be forgotten its purpose is to provide one kind
Valve and the relief circuit for using emergency operation valve.
A kind of scheme of emergency operation valve of the present invention is that a kind of emergency operation valve in valve opening state and can close
It carries out selecting a switching between valve state, the emergency operation valve is characterized in that having:
Clack box has the valve chamber of empty shape；First oil circuit is formed in the clack box, and to supply to the valve chamber
Working oil oil circuit；Second oil circuit is formed in the clack box, and is the oil circuit of the working oil discharged from the valve chamber；By
Splenium makes the first position of first oil circuit and second oil communication and is making first oil circuit and described second
Oil circuit cutting the second position between it is movable in the state of, be configured at the valve chamber；And elastomeric element, from described
Two are positioned against on the direction of the first position to compression zone force.
Moreover, it relates to a scheme of relief circuit be that a kind of relief circuit is used in hydraulic working machine
Hydraulic circuit in, the relief circuit has: pressure reducing valve, be installed in pump connection supply oil circuit and connect with container
Discharge oil circuit between；With pilot pressure control valve, supply and discharge of the pilot pressure to the pressure reducing valve, the elder generation are controlled
Pilot force control valve includes above-mentioned emergency operation valve and constitutes.
Beneficial effect
One scheme of the vehicle and relief circuit that are related to according to the present invention can reduce and forget a possibility that releasing.
Detailed description of the invention
Fig. 1 is the construction explanatory diagram for the emergency operation valve that one embodiment of the present invention is related to, and Figure 1A is valve opening state, figure
1B is closed valve state.
Fig. 2 is the loop diagram for the relief circuit that one embodiment of the present invention is related to.
Fig. 3 A is the action specification figure of the emergency operation valve of non-operating state, and Fig. 3 B is that emergency operation valve is non-operating state
In the case where relief circuit action specification figure.
Fig. 4 A is by the action specification figure of the emergency operation valve of hand press operation, and Fig. 4 B is emergency operation valve by hand press operation
The action specification figure of relief circuit under state.
Fig. 5 A is the action specification figure of the emergency operation valve automatically kept, and Fig. 5 B is the shape that emergency operation valve is automatically kept
The action specification figure of relief circuit under state.
The action specification figure for the emergency operation valve that Fig. 6 A has been automatic homing, Fig. 6 B are emergency operation valve automatic homings
The action specification figure of relief circuit under state.
Fig. 7 is the circuit diagram of relief circuit in the prior art.
Fig. 8 is the cross-sectional view of emergency operation valve in the prior art.
Specific embodiment
Hereinafter, being illustrated with reference to the accompanying drawings to emergency operation valve involved in embodiments of the present invention.
< 1. is about emergency operation valve A >
Firstly, being illustrated according to Fig. 1 to emergency operation valve A.In addition, in Fig. 1, using top as an extreme direction, will under
Another extreme direction of Fang Zuowei is illustrated.
Firstly, being illustrated to the summary of emergency operation valve A.Emergency operation valve involved in present embodiment is split
Valve state and closed valve state can carry out selecting the emergency operation valve of a switching, have: have the valve chamber of empty shape (such as aftermentioned
Valve chamber 12) clack box (for example, aftermentioned clack box 11)；As being formed in above-mentioned clack box, to the working oil of above-mentioned valve chamber supply
Oil circuit, the first oil circuit (for example, aftermentioned pump side access 17)；As being formed in above-mentioned clack box, and discharged from above-mentioned valve chamber
The oil circuit of working oil, the second oil circuit (for example, aftermentioned container side access 18)；Make above-mentioned first oil circuit and above-mentioned second oil
The first position (such as position of the compression zone 15 of Figure 1A) and cut off above-mentioned first oil circuit and above-mentioned second oil circuit that road is connected to
The second position (for example, position of the compression zone 15 of Figure 1B) between it is movable in the state of, configure above-mentioned valve chamber compression
Portion's (for example, aftermentioned compression zone 15) and in the direction from said second position towards above-mentioned first position (for example, Figure 1A, 1B
Top) on to above-mentioned compression zone force elastomeric element (such as aftermentioned spring 16).
Then, it is illustrated for emergency operation valve A to specific structure.In Figure 1A, clack box 11 is formed in inside as circle
The valve chamber 12 in the cavity of tubular.In valve chamber 12, it can be loosely inserted into valve body 13 back and forth.In addition, in the following description, it will be with valve
A direction (top of Figure 1A, Figure 1B) involved in the round-trip activity of body 13 is also referred to as first direction, equally, by another side
Second direction is also referred to as to (lower section of Figure 1A, Figure 1B).
In addition, in the following description, the unloaded state of so-called emergency operation valve A refers to the valve opening shape of emergency operation valve A
State.On the other hand, the stress state of so-called emergency operation valve A, refers to the closed valve state of emergency operation valve.In addition, so-called unloading
The unloaded state in circuit refers to that working oil can be by the state of the pressure reducing valve 5 of relief circuit (referring to Fig. 2) (that is, pressure reducing valve 5
Valve opening state).On the other hand, the stress state of so-called relief circuit refers to that working oil can not be by the pressure reducing valve 5 of relief circuit
State (that is, closed valve state of pressure reducing valve 5).In turn, the unloaded state of the so-called group of hydraulic circuit for having entered relief circuit, refers to
Not to the state of the hydraulic actuating mechanism supply working oil of hydraulic working machine.On the other hand, the so-called group of liquid for having entered relief circuit
The stress state for pushing back road refers to the state to the hydraulic actuating mechanism supply working oil of hydraulic working machine.
Valve body 13 is constituted by the valve rod 14 of pole shape and in the flange shape compression zone 15 that is formed of middle part of valve rod 14.By
Splenium 15 is the diameter component bigger than valve rod 14.It is formed and is held in the upper surface (that is, surface of first direction side) of compression zone 15
By the compression face of the pressure of working oil.On the other hand, it is formed and is born on the lower surface of compression zone 15 (that is, surface of second direction)
The spring side compression face of the spring pressure of aftermentioned spring 16.Because compression zone 15 bears the pressure of working oil, so by valve body 13
It is pressed to second direction side (another side, the i.e. downside of Figure 1A).
Valve chamber 12 is divided to for upper and lower two parts by compression zone 15.By in valve chamber 12 than compression zone 15 closer to first direction side
The space of (one end, the upside of Figure 1A, Figure 1B) is referred to as compression chamber 12a.On the other hand, it will more be leaned in valve chamber 12 than compression zone 15
The space of nearly second direction side (downside of Figure 1A, Figure 1B) is referred to as spring housing 12b.That is, valve chamber 12 is separated into work by compression zone 15
Compression chamber 12a for the first Room and spring housing 12b as second Room.
The volume of compression chamber 12a and spring housing 12b generate variation according to the back and forth movement of compression zone 15.Such as Figure 1A
Shown, in the state that compression zone 15 has been moved to the first direction side of valve chamber 12 completely, the volume of compression chamber 12a becomes most
Small, the volume of spring housing 12b becomes maximum.
In spring 16 of the spring housing 12b configuration as an example of elastomeric element.Under the upper end of spring 16 and compression zone 15
Surface (that is, spring side compression face) abuts.Second direction (Figure 1A, Figure 1B in the lower end of spring 16 and the inner surface of clack box 11
Downside) end face abut.In this state, spring 16 exerts a force to first direction side (upside of Figure 1A, Figure 1B) and presses valve body
13.In addition, the type of elastomeric element and the position of elastomeric element, the case where being not limited to present embodiment.
Pump side access 17 and container side access 18 are formed in clack box 11.Pump side access 17 is formed in the central portion of valve chamber 12
Between the end of first direction side.In other words, pump side access 17 in valve body 13 by the spring pressure of spring 16 to first party
To end displacement in the state of, be formed in than compression zone 15 closer to second direction side (downside of Figure 1A, Figure 1B).
Container side access 18 is formed in the end (lower end of Figure 1A, Figure 1B) of the second direction of valve chamber 12.That is, valve body 13 exists
To in the state of the end displacement of first direction under the spring pressure effect of spring 16, pump side access 17 and container side access 18
Than compression zone 15 closer to second direction.In other words, under the valve opening state of emergency operation valve A, pump side access 17 and container
Side access 18 is connected to the spring housing 12b of valve chamber 12.In addition, be provided between valve rod 14 and clack box 11 for valve chamber 12 into
The liner 19 of row hydraulic seal.
As shown in Figure 1A, it is pressed upwards on to first party than pump side access in the compression zone 15 of valve body 13 by spring 16
17 closer in the state of first direction side (top of Figure 1A), and pump side access 17 is connected to container side access 18.The state is
The valve opening state of emergency operation valve A.
It on the other hand, as shown in Figure 1B, is to press 13 people of valve body, if under compression zone 15 is dropped to from pump side access 17
Side then supplies working oil to compression chamber 12a by pump side access 17.If compression chamber 12a is full of working oil, valve body 13 is pressurized
The pressure that portion 15 is born is pressed.In addition, pressing the movement of lower valve body 13, it is not limited to the case where people directly presses.Also, press lower valve
The main body of body 13, is not limited to people.For example, it is also possible to which lower valve body 13 is mechanically pressed by robot controlled by computer etc..
In the state that valve body 13 is pressed, even if stopping by the operation of lower valve body 13 (that is, artificially applying even if removing
To the power of valve body 13), valve body 13 can also be kept in the position.The function is referred to as and automatically keeps function.Function is automatically kept at this
During capable of playing a role, it is cut off between pump side access 17 and container side access 18.The state is the valve closing shape of emergency operation valve A
State.
On the other hand, the working oil of pump side access 17 is supplied, if (stopping for some reason for example, pumping) and disconnecting,
Power due to pressing compression zone 15 disappears, and is pushed valve body 13 to first direction side (upside of Figure 1B) by spring 16,
And restore to the state of Figure 1A.The function is referred to as automatic reset function.If automatic homing, become 17 He of pump side access again
The state that container side access 18 is connected to.
Emergency operation valve A of the invention, since with above-mentioned automatic reset function, realizing can be prevented urgent
The effect of return normal condition is forgotten after measure.
< 2. is about relief circuit B >
Then, illustrate in the relief circuit of the lorry loading formula crane of an example as hydraulic working machine using urgent
The embodiment of operation valve A.Firstly, illustrating the loop structure around relief circuit B according to fig. 2.
Fig. 2 shows hydraulic pumps 1, the discharge oil circuit 3 and container 4 for supplying oil circuit 2, working oil of working oil.Supply oil circuit 2
Each executing agency of crane is connected via operation valve cell 20 with discharge oil circuit 3.Diagram has Winch motor 21, boom in Fig. 2
Fluctuating cylinder 22 and hoisting arm expansion cylinder 23, but there is also other various hydraulic actuating mechanisms (not shown).With above-mentioned
In the hydraulic circuit of such basic structure, between supply oil circuit 2 and discharge oil circuit 3, it is provided with relief circuit of the invention
B。
Hereinafter, being described in detail for relief circuit B further progress.Hydraulic pump 1 is by engine of vehicle etc. as driving
Source.If engine is driven, in the starting of power withdrawing device, engine power is delivered to hydraulic pump 1, hydraulic pump 1 at
For operating condition.If power withdrawing device stops or engine stop, hydraulic pump 1 becomes halted state.
Supply oil circuit 2 will the working oil that be discharged by hydraulic pump 1 be supplied to Winch motor 21, boom fluctuating cylinder 22 and
Each hydraulic actuating mechanism such as hoisting arm expansion cylinder 23.The working oil discharged from each hydraulic actuating mechanism is returned via discharge oil circuit 3
To container 4.Relief circuit B includes: connection supplies oil circuit 2 and discharges the oil circuit 7 of oil circuit 3 and be mounted on the pressure reducing valve 5 of oil circuit 7.
Pressure reducing valve 5 has: the pilot circuit 5a to exert a force to valve opening position the and spring 5b to exert a force to valve closing direction and elder generation
Lead back to road 5c.Pilot circuit 5a and pilot circuit 5c, receives the supply of pilot pressure from oil circuit 7.
It is more after being added than the pilot pressure of the spring pressure of spring 5b and pilot circuit 5c in the pressure Pa of pilot circuit 5a
In the case that total pressure Pb is also small, pressure reducing valve 5 becomes closed valve state.In the case where pressure reducing valve 5 is closed valve state, working oil
It does not unload but is supplied to each hydraulic actuating mechanism.Then, hydraulic working machine starts to execute movement.
But if the pressure of pilot circuit 5c is discharged and disappeared, pressure Pa and pressure Pb generate balance and open valve
(state of pressure reducing valve 5 shown in Fig. 3 B).In this case, the working oil being discharged by hydraulic pump 1, via oil circuit 7 and decompression
Valve 5 is back to discharge oil circuit 3 (being unloaded).Therefore, above-mentioned working oil is not supplied with to each hydraulic actuating mechanism, hydraulic work
Industry machine does not execute movement.
Pilot control circuit 8 is provided between the pilot circuit 5c and discharge oil circuit 3 of pressure reducing valve 5.It is returned in pilot control
Being installed in series in road 8 has electromagnetic opening and closing valve 6 and emergency operation valve A.
Electromagnetic opening and closing valve 6 and emergency operation valve A are allowed hand over to the pilot pressure of the pilot circuit 5c of pressure reducing valve 5
Supply and discharge.If the pilot circuit 5c to pressure reducing valve 5 supplies pilot pressure, 5 closure valve of pressure reducing valve.On the other hand, if
Pilot pressure is discharged from pilot circuit 5c, then pressure reducing valve 5 opens valve.Electromagnetic opening and closing valve 6 and emergency operation valve A in this way
Between opening and closing switching, allow hand over the unloaded state and stress state of relief circuit B.
Electromagnetic opening and closing valve 6 is used in usual operation, the signal based on the anti-switch 9 for licking device from suspension hook and into
Action is made.On the other hand, in order to urgent in the case that the communication line between switch 9 and electromagnetic opening and closing valve 6, which generates, to break
Reply, emergency operation valve A are arranged in guide's control loop 8.Such emergency operation valve A is operated by manually.
Movement > of the < 2.1 about relief circuit B
Hereinafter, referring to Fig. 3Fig. 6 is illustrated the movement of relief circuit B.In addition, solenoid drives in following explanation
For streaming current because the reasons such as broken string are not powered in electromagnetic opening and closing valve 6, electromagnetic opening and closing valve 6 is maintained at valve opening state by spring.
> when < 2.1.1 not operation
Fig. 3 A shows the state (in other words, valve opening state) for not carrying out pressing operation to emergency operation valve A.In emergency operation
Under the valve opening state of valve A, compression zone 15 is located at the end of the first direction in valve chamber 12 by the pressing of spring 16.In addition,
So-called pump side access 17 is connected to like that as shown by arrow y with container side access 18.
About the valve opening state of emergency operation valve A, it is specifically described referring to Fig. 3 A.In the valve opening shape of emergency operation valve A
Under state, compression zone 15 is located at the end of the first direction (upside of Fig. 3 A) of valve chamber 12 by the pressing of spring 16, therefore by
The aftermentioned hand press operation state of the volume ratio of pressure chamber 12a and the compression chamber 12a automatically kept under state are small.
On the other hand, under the valve opening state of emergency operation valve A, the aftermentioned hand press operation shape of the volume ratio of spring housing 12b
State and the compression chamber 12a automatically kept under state are big.
Under the valve opening state of emergency operation valve A, pump side access 17 and container side access 18 are connected to spring housing 12b.
Therefore, under the valve opening state of emergency operation valve A, pump side access 17 is connected to container side access 18 via spring housing 12b.
In the case where emergency operation valve A is valve opening state, if indicating the emergency operation in relief circuit B with hydraulic mark
Valve A then becomes shown in Fig. 3 B like that, and pilot control circuit 8 is connected to discharge oil circuit 3.As a result, pilot pressure is from pressure reducing valve
5 releases, pressure reducing valve 5 become valve opening state.
It is sent via oil circuit 7 (referring to Fig. 2) from supply oil circuit 2 in this case, working oil as shown in arrow Xa in Fig. 3 B, becomes
To the unloaded state of discharge oil circuit 3.That is, under unloaded state, since working oil is not supplied with to each hydraulic actuating mechanism,
Each hydraulic actuating mechanism of hydraulic working machine does not drive.In this way, the accidents such as lick of suspension hook can be prevented.
> when < 2.1.2 hand press operation
Suspension hook it is anti-lick after, it is necessary to suspension hook is put down, or boom is made to be moved to stowed position.Therefore, it is necessary to
Hydraulic circuit is generally held in stress state.Therefore, as shown in Figure 4 A, crane operator is pressed into emergency operation valve A with hand
Valve body 13.Specifically, crane operator is by one end (upper end of Fig. 3 A) of valve rod 14 to second direction (under Fig. 3 A
Side) it pushes.
In this way, compression zone 15 is mobile to second direction together with valve rod 14, emergency operation valve A becomes state shown in Fig. 4 A
(hereinafter referred to as " closed valve state ").As a result, being cut off between pump side access 17 and container side access 18 by compression zone 15.In addition,
The valve body 13 of emergency operation valve A, not only can be directly pressed into hand, can also be pressed into such as via machinery.
About the closed valve state of emergency operation valve A, specifically it is illustrated referring to Fig. 4 A.In the valve closing shape of emergency operation valve A
In state, compression zone 15 is located at the general central portion of valve chamber 12.In this state, pump side access 17 is connected to compression chamber 12a.It is another
Aspect, container side access 18 are connected to spring housing 12b.Therefore, under the closed valve state of emergency operation valve A, pump side access 17 with
Container side access 18 is not connected to.
In the case where emergency operation valve A is closed valve state, if indicating the urgent behaviour in relief circuit B with hydraulic mark
Make valve A, then becomes shown in Fig. 4 B like that, pilot control circuit 8 is closed.As a result, not only applying spring pressure to pressure reducing valve 5, also
Apply the pilot pressure from pilot circuit 5c, pressure reducing valve 5 becomes closed valve state.In this case, working oil becomes arrow in Fig. 4 B
Shown in head Xo, send from supply oil circuit 2 to the stress state of each hydraulic actuating mechanism.In this way, the putting down of suspension hook, boom can be carried out
Harvesting movement.
< 2.1.3 automatically keeps state >
However, when carry out suspension hook put down or the harvesting of boom operate when, crane operator presses promptly in one hand
In the state of operation valve A, need to operate crane with another hand.
Fig. 5 A indicates that hand is left the state that valve body 13 stops push operation by crane operator.Under the state, from pump side
Access 17 flows into the working fluid pressure of compression chamber 12a, presses compression zone 15 and keeps valve body 13, therefore pump side access 17 and container
Side access 18 is maintained at cut-off state.That is, automatically keeping the closed valve state of emergency operation valve A.
In other words, in the state of shown in Fig. 5 A, based on the pressure of the working oil in compression chamber 12a, compression zone 15 by
The power (hereinafter referred to as the first pressing force) of second direction (lower section of Fig. 5 A) pressing and the elastic force compression zone 15 based on spring 16
Balance is generated to the power (hereinafter referred to as the second pressing force) of first direction (above Fig. 5 A) pressing.Therefore, the position of compression zone 15
It sets and is maintained at position shown in Fig. 5 A (that is, second position).In the case where present embodiment, above-mentioned first pressing force and above-mentioned
Two pressing forces balance each other as defined condition.
In pressure reducing valve 5, if the spring pressure that holding is applied with spring 5b adds the state of the pilot pressure of pilot circuit 5c,
Then pressure reducing valve 5 continues to keep closed valve state.That is, in the case where from the point of view of the hydraulic circuit shown in Fig. 5 B, keep working oil by from
Supply oil circuit 2 is sent to the stress state of each hydraulic actuating mechanism (referring to the arrow Xo of Fig. 5 B).In this way, crane operator can
Continue suspension hook put down and the harvesting of boom.
< 2.1.4 automatic homing >
Emergency operation valve A involved in present embodiment, from closed valve state automatic homing to valve opening state.Hereinafter, to tight
The automatic homing of anxious operation valve A is illustrated.If crane operator terminates the harvesting operation of boom, stop starting for vehicle
Machine operating.If engine stop, the rotation of hydraulic pump 1 stops, and working oil no longer is discharged from hydraulic pump 1.Then, pressure is urgent
The compression chamber 12a of anxious operation valve A discharges, and above-mentioned first pressing force becomes smaller than above-mentioned second pressing force.As a result, as schemed
Shown in 6A, by the pressing (that is, above-mentioned second pressing force) of spring 16, valve body 13 is moved to first direction (top of Fig. 6 B).
Also, compression zone 15 is located at the position that first direction side (top of Fig. 6 B) is leaned on than pump side access 17, pump side access 17 and container
It is connected between side access 18.So, emergency operation valve A is from closed valve state to valve opening state automatic homing.
If emergency operation valve A automatic homing as shown above, pilot pressure is discharged from pressure reducing valve 5, pressure reducing valve 5 opens valve
Door.If pressure reducing valve 5 opens valve, working oil becomes from supply oil circuit 2 to discharge oil circuit 3 and flows as shown in arrow Xa in Fig. 6
Unloaded state.Thus, for example, even if in the case where the engine of vehicle starts to start to make hydraulic pump 1 to restart,
It can prevent suspension hook or the undesigned movement of boom.It can prevent from being difficult to expect accident in this way.
In the above-described embodiment, relief circuit B is constituted using emergency operation valve A and electromagnetic opening and closing valve 6.But
Relief circuit can also be only made of emergency operation valve A.
In addition, non-common operation valve A involved in present embodiment, is not limited to prevent licking device, can also be applied to group
Enter the relief circuit for other devices (for example, overload protective device etc.) that there is the movement for making crane to stop function.
Effect/effect > of the < 3. about present embodiment
According to the present embodiment, following such effect/effect is realized.
Firstly, emergency operation valve A involved in present embodiment, as described above, from closed valve state automatic homing to valve opening
State.Specifically, in the closed valve state shown in Fig. 4 A, 5A, if because of reasons such as the driving stoppings of hydraulic pump 1, no longer from pump
Side access 17 supplies working oil, the then pressure for the working oil in compression chamber 12a that compression zone 15 is born to compression chamber 12a
Reduce.Then, valve body 13 (specifically, compression zone 15) by spring 16 from the position of closed valve state to first direction (Fig. 4 A,
The top of 5A) displacement.As a result, compression zone 15 is moved to the end (upper end of Fig. 4 A, 5b) of the first direction of valve chamber 12, pump
Side access 17 is connected to container side access 18 via spring housing 12b.That is, not by artificial power come operating valve body 13, promptly
Operation valve A just restores to valve opening state shown in Fig. 6 A.As previously discussed, since the emergency operation valve A of present embodiment is from closing
Valve state automatic homing, therefore will not there is a situation where forget to release emergency operation valve A to valve opening state.
In addition, relief circuit B involved in present embodiment has above-mentioned such emergency operation valve A.Therefore, if it is adjoint
The stopping of the engine of hydraulic working machine etc., hydraulic pump 1 stop, then emergency operation valve A is from closed valve state automatic homing to valve opening
State.With the automatic homing of such emergency operation valve A, the hydraulic circuit that group has entered relief circuit B switches from stress state
To unloaded state.In this way, relief circuit B involved according to the present embodiment, due to that will not forget to release emergency operation
The case where valve A, therefore hydraulic working machine will not arbitrarily execute movement, so as to prevent the generation of accident.
< 4. is attached with >
As the reference example of emergency operation valve, oil circuit is selected into an emergency operation valve for switching to valve opening state and closed valve state
Have: clack box；It is formed in the valve chamber of the empty shape in clack box；It can be loosely inserted into the indoor valve body of valve back and forth；By valve body to valve
One extreme direction of room pushes the spring of force；It is formed in clack box, the pump side access being connected to the one end of valve chamber；And and valve chamber
Another side connection container side access, valve body has compression zone, which bears the working solution that flows into from pump side access
The power in the direction for pushing back spring is pressed and generates, if resisting spring and artificially pushing valve body to another side, compression zone
It will not only be cut off between pump side access and container side access, and even if stopping pressing operation, it also can be because of the power of compression zone generation
And hold mode is pushed back valve body to one end using spring when losing the pressure of pump side access, makes pump side access and container
The connection of side access.
According to the reference example of above-mentioned emergency operation valve, if resisting spring and artificially pressing valve body, compression zone due to
The pressure for bearing the working oil supplied by pump side access is maintained at the state after spring-compressed, therefore even if stops pressing behaviour
Make, can also remain at the state that will be cut off between pump side access and container side access.In addition, the compression zone in valve body bears work
During making hydraulic coupling, even if stopping artificially pressing operation, can also be automatically kept as by pump side access and container side access it
Between the state cut off.If also, because the driving of pump stop etc. reasons, cause no longer from pump side access supply working oil, then by
It is reduced in the pressure that compression zone is born, and valve body is exerted a force by spring force, therefore automatic homing makes pump side access and container side
It is connected between access.Therefore, it will not generate and forget the case where releasing emergency operation valve.
In addition, the reference example 1 as relief circuit, by oily with the supply oil circuit of pump connection and the discharge being connect with container
The pressure reducing valve installed between road and the pilot pressure control valve for controlling supply and the discharge of pilot pressure to pressure reducing valve constitute hydraulic
Relief circuit in the hydraulic circuit of working rig can also constitute pilot pressure control using the emergency operation valve of above-mentioned reference example
Valve.
Using the reference example 1 of above-mentioned relief circuit, if pressing operation emergency operation valve makes pump side access and appearance
The state cut off between the access of device side, then pressure reducing valve bears pilot pressure and keeps blocking state, and working oil is supplied to hydraulic
Operation pusher side, therefore hydraulic working machine is acted as usual.Also, if engine for making hydraulic working machine etc. stops,
It then pumps and also stops, so that the pressure of pump side access disappears, therefore the valve body of emergency operation valve becomes the state to be exerted a force by spring, makes
It obtains and is connected between pump side access and container side access.In this way, the case where restoring emergency operation valve is forgotten due to that will not generate,
Hydraulic working machine will not arbitrarily execute movement, so as to prevent the generation of accident.
In addition, the reference example 2 as relief circuit, in the relief circuit of above-mentioned reference example 1, pilot pressure control valve by
Be installed in series electromagnetic opening and closing valve and manual open and close valve composition in pilot circuit, can also set above-mentioned for manual open and close valve
The emergency operation valve of reference example.
According to the reference example 2 of above-mentioned relief circuit, under normal circumstances, opening for pressure reducing valve is controlled by electromagnetic opening and closing valve
It closes, carries out the anti-of suspension hook and lick, but in the case where the electrical system connecting with electromagnetic opening and closing valve has occurred and the failures such as breaks, lead to
Manually emergency operation valve is crossed to control the opening and closing of pressure reducing valve.Also, even if occurring forgetting the case where releasing emergency operation valve, by
Movement will not be arbitrarily executed in hydraulic working machine, therefore the generation of accident can be prevented.
The specification that includes in the Japanese invention application Patent 2016-076332 submitted on 04 06th, 2016, attached drawing with
And the disclosure of abstract, it all quotes and is added in the application.
Symbol description:
1 hydraulic pump
2 supply oil circuits
3 discharge oil circuits
5 pressure reducing valves
6 electromagnetic opening and closing valves
8 pilot control circuits
11 clack boxes
12 valve chambers
13 valve bodies
14 valve rods
15 compression zones
16 springs
17 pump side accesses
18 container side accesses
A emergency operation valve
B relief circuit.
Claims (8)
1. a kind of emergency operation valve can carry out selecting a switching between valve opening state and closed valve state, the emergency operation valve
It is characterized in that having:
Clack box has the valve chamber of empty shape；
First oil circuit is formed in the clack box, and is the oil circuit of the working oil supplied to the valve chamber；
Second oil circuit is formed in the clack box, and is the oil circuit of the working oil discharged from the valve chamber；
Compression zone makes the first position of first oil circuit and second oil communication and is making first oil circuit and institute
State the second oil circuit cutting the second position between it is movable in the state of, be configured at the valve chamber；And
Elastomeric element, towards the direction of the first position, exerts a force to the compression zone from the second position.
2. emergency operation valve according to claim 1, which is characterized in that
The valve chamber is divided into the first Room and second Room by the part in compression, and the compression zone is in the shape for being located at the second position
Under state, first oil circuit is connected to first Room, and second oil circuit is connected to the second Room.
3. emergency operation valve according to claim 2, which is characterized in that
The compression zone is in the state of being located at the first position, first oil circuit and second oil circuit and described the
The connection of two Room.
4. emergency operation valve according to claim 2 or 3, which is characterized in that
In the case where the elastic force of the hydraulic and described elastomeric element of the described first indoor working oil meets rated condition, institute
The position for stating compression zone maintains the second position.
5. emergency operation valve according to claim 4, which is characterized in that
The defined condition is not met in the elastic force of the hydraulic and described elastomeric element of the described first indoor working oil
In the case of, elastic force of the compression zone based on the elastomeric element is moved to the first position from the second position.
6. emergency operation valve according to any one of claims 1 to 5, which is characterized in that
The compression zone can be made to be moved to the second position from the first position by artificial power.
7. a kind of relief circuit, is used in the hydraulic circuit of hydraulic working machine, the relief circuit is characterized in that having:
Pressure reducing valve is installed in and is pumped between the supply oil circuit connected and the discharge oil circuit connecting with container；With
Pilot pressure control valve controls supply of the pilot pressure to the pressure reducing valve and the discharge from the pressure reducing valve,
The pilot pressure control valve is configured to, and includes claimAny one of described in emergency operation valve.
8. relief circuit according to claim 7, which is characterized in that
The pilot pressure control valve is made of the electromagnetic opening and closing valve being installed in series in pilot circuit and manual open and close valve, described
Manual open and close valve is the emergency operation valve.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016076332 | 2016-04-06 | ||
| JP2016-076332 | 2016-04-06 | ||
| PCT/JP2017/014320 WO2017175820A1 (en) | 2016-04-06 | 2017-04-06 | Emergency operation valve and unloading circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109073111A true CN109073111A (en) | 2018-12-21 |
| CN109073111B CN109073111B (en) | 2019-12-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780020907.6A Active CN109073111B (en) | 2016-04-06 | 2017-04-06 | Emergency operation valve and unloading circuit |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6219554B1 (en) |
| KR (1) | KR101942229B1 (en) |
| CN (1) | CN109073111B (en) |
| WO (1) | WO2017175820A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112524325A (en) * | 2020-11-30 | 2021-03-19 | 沧州润久智能仪表有限公司 | Emergency valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3495501A (en) * | 1968-06-04 | 1970-02-17 | Gen Electric | Valve operating and emergency closing mechanism |
| US5577532A (en) * | 1994-07-11 | 1996-11-26 | Palmer; Thomas W. | Valve actuator |
| JPH1113715A (en) * | 1997-06-25 | 1999-01-22 | Kubota Corp | Hydraulic unit for driving emergency device |
| CN202023953U (en) * | 2011-04-14 | 2011-11-02 | 东莞市骏颖机械制造有限公司 | High and low pressure switching valve for polyurethane high pressure foaming machine |
| CN104736858A (en) * | 2012-07-31 | 2015-06-24 | 卡特彼勒公司 | A hydraulic system with a dynamic seal |
| CN204677838U (en) * | 2015-06-09 | 2015-09-30 | 武汉东江阀业制造有限公司 | Ultrahigh pressure direct-acting type transient equilibrium valve |
| CN204805220U (en) * | 2015-05-27 | 2015-11-25 | 上海朝田实业有限公司 | Piston ultralow pressure overflow valve |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59186569U (en) * | 1983-05-31 | 1984-12-11 | 三井精機工業株式会社 | Self-holding on-off valve equipped with safety device |
| JP2008137454A (en) | 2006-11-30 | 2008-06-19 | Furukawa Unic Corp | Anti-theft device of working machine |
| JP2009154740A (en) | 2007-12-27 | 2009-07-16 | Tadano Ltd | Control device for working vehicle |
| JP5135169B2 (en) * | 2008-10-31 | 2013-01-30 | 日立建機株式会社 | Hydraulic drive unit for construction machinery |
-
2017
- 2017-04-06 JP JP2017541124A patent/JP6219554B1/en active Active
- 2017-04-06 KR KR1020187026482A patent/KR101942229B1/en active IP Right Grant
- 2017-04-06 CN CN201780020907.6A patent/CN109073111B/en active Active
- 2017-04-06 WO PCT/JP2017/014320 patent/WO2017175820A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3495501A (en) * | 1968-06-04 | 1970-02-17 | Gen Electric | Valve operating and emergency closing mechanism |
| US5577532A (en) * | 1994-07-11 | 1996-11-26 | Palmer; Thomas W. | Valve actuator |
| JPH1113715A (en) * | 1997-06-25 | 1999-01-22 | Kubota Corp | Hydraulic unit for driving emergency device |
| CN202023953U (en) * | 2011-04-14 | 2011-11-02 | 东莞市骏颖机械制造有限公司 | High and low pressure switching valve for polyurethane high pressure foaming machine |
| CN104736858A (en) * | 2012-07-31 | 2015-06-24 | 卡特彼勒公司 | A hydraulic system with a dynamic seal |
| CN204805220U (en) * | 2015-05-27 | 2015-11-25 | 上海朝田实业有限公司 | Piston ultralow pressure overflow valve |
| CN204677838U (en) * | 2015-06-09 | 2015-09-30 | 武汉东江阀业制造有限公司 | Ultrahigh pressure direct-acting type transient equilibrium valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109073111B (en) | 2019-12-13 |
| KR101942229B1 (en) | 2019-01-24 |
| WO2017175820A1 (en) | 2017-10-12 |
| JPWO2017175820A1 (en) | 2018-04-12 |
| JP6219554B1 (en) | 2017-10-25 |
| KR20180108837A (en) | 2018-10-04 |
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