CN209721397U - A kind of proportional multi-way valve of getting on the bus for lorry-mounted crane - Google Patents

Abstract

The utility model discloses a kind of proportional multi-way valves of getting on the bus for lorry-mounted crane, including oil inlet connection, work connection and tail connection；Oil inlet connection is machined with oil inlet P mouth and 1 mouthful and T2 mouthfuls of two oil return inlet Ts；Work connection is machined with actuator port；It is machined with installation cavity on P mouthfuls of the connection internal galleries between T1 mouthfuls and T2 mouthfuls in oil inlet connection, flow divider is installed in the installation cavity；The PT mouth for connection leg multi-way valve oil-feed port is machined on tail connection, the PT mouthfuls passes sequentially through normally closed type unidirectional cutoff solenoid valve, the third main oil gallery of tail connection, the second main oil gallery joined that works and is connected with the first main oil gallery that oil inlet joins, and the oil inlet port of the first main oil gallery is P mouthfuls；For selecting PT mouthfuls of pressure or selecting the load pressure feedback of work connection to the selector valve of flow divider, the pressure and P mouthfuls of pressure difference size that flow divider is fed back according to selector valve determine the P mouthfuls of oil mass ratios for branching to oil return opening for installation on tail connection；PT mouthfuls could only be connected in the case where normally closed type unidirectional cutoff solenoid valves with P mouthfuls.

Description

A kind of proportional multi-way valve of getting on the bus for lorry-mounted crane

Technical field

The utility model relates to the control technologies of hydraulic system, more particularly to the logic control of lorry-mounted crane safety operation System, specifically a kind of proportional multi-way valve of getting on the bus for lorry-mounted crane.

Background technique

Lorry-mounted crane currently on the market carries out the control of upper frame part using multiple directional control valve or proportional multi-way valve, with The Multi-way valve with support leg connection got off is substantially the advanced Multi-way valve with support leg of pressure oil of oil pump again into multi-way valve of getting on the bus, this control mould Formula in the actual operation process, when getting on the bus in lifting operation, if Multi-way valve with support leg is misused, will cause to turn over The danger of vehicle.

Summary of the invention

Technical problem to be solved in the utility model is that in view of the above-mentioned state of the art, and providing a kind of can prevent Cause the dangerous proportional multi-way valve of getting on the bus for lorry-mounted crane that overturns because of maloperation.

The case that the utility model solves technical solution used by above-mentioned technical problem, solves blockage problem are as follows:

A kind of proportional multi-way valve of getting on the bus for lorry-mounted crane, including the oil inlet connection, work connection and tail connection being sequentially connected； Oil inlet connection is machined with oil inlet P mouth and 1 mouthful and T2 mouthfuls of two oil return inlet Ts；Work connection is machined with for controlling crane work Actuator port；It is integral with work connection assembled end respectively that oil inlet connection and tail connection cross screw；In P mouthfuls and T1 of connection in oil inlet connection It is machined with installation cavity on internal galleries between mouth and T2 mouthfuls, the shunting for realizing the control of oil mass ratio is installed in the installation cavity Valve；Be machined with PT mouth for connection leg multi-way valve oil-feed port on tail connection, the PT mouthfuls pass sequentially through be mounted on tail join it is normal The first main oil gallery phase that the second main oil gallery that enclosed unidirectional cutoff solenoid valve, the third main oil gallery of tail connection, work join joins with oil inlet Connection, the oil inlet port of the first main oil gallery are P mouthfuls；Installation is for selecting PT mouthfuls of pressure or the load of selection work connection on tail connection Selector valve of the pressure feedback to flow divider.

To optimize above-mentioned technical proposal, the measure taken further include:

Above-mentioned flow divider is by flow divider valve core, little spring, steel ball, steel ball seat, big spring, big spring seat, valve shell, adjusting Bolt and locking cap composition；Installation cavity is cavity up and down, and flow divider valve core is slidably arranged in installation cavity, installation cavity Lower accent spiral is equipped with oil storage and blocks up, and stifled match with flow divider valve core of oil storage is formed with the P mouth for acting on flow divider valve core lower end pressure Power chamber；Valve shell is mounted on the upper accent of installation cavity, which matches to be formed with the upper accent of installation cavity and act on point The feedback pressure chamber of flow valve core upper end；Flow divider valve core is axially machined with the axial oil duct of connection P mouthfuls of pressure chambers and feedback pressure chamber And it is connected to the radial direction oil of axial oil duct, radial direction oil is connected with the first main oil gallery；Little spring and steel ball are through steel ball seat list It is hermetically fitted in liquid in the upper port of axial oil duct；Big spring and big spring seat are installed in feedback pressure chamber, and The upper end phase apical grafting of one end of big spring and flow divider valve core, the big spring other end and big spring seat phase apical grafting；Adjust bolt spiral It is mounted on valve shell, and adjusts bolt and extend into top surface phase apical grafting in feedback pressure chamber with big spring seat, locking cap spiral shell Rotation be mounted on adjust bolt on and with valve shell outer end face phase apical grafting.

It is machined with the back oil road for being connected to T1 mouthfuls He T2 mouthfuls in above-mentioned oil inlet connection, is machined with and is shunting on flow divider valve core The annular channel of P mouthfuls of oil masses shunting is realized when spool moves up for linking up back oil road and the first main oil gallery；Selector valve Feedback pressure is transferred in feedback pressure chamber；Being provided on steel ball seat can make the pressure oil fed back in feedback pressure chamber (4c) push steel open Pearl enters the connection oil duct of axial oil duct.

There are three hydraulic fluid ports for above-mentioned selector valve tool, in which: it is small that No. 1 hydraulic fluid port of selector valve successively joins process first through tail Hole, second orifice, third aperture are connected with the load oilhole of work connection processing, and the pressure for loading oilhole is derived from work connection load Pressure；Fourth aperture, fiveth aperture, sixth aperture, seventh aperture, the of No. 2 hydraulic fluid ports of selector valve successively through tail connection processing Eight apertures, the 9th aperture, the connection aperture of work connection processing, the first feedback hole of oil inlet connection processing, the second feedback hole, third are anti- Feed-through, the 4th feedback hole and the 5th feedback hole are connected to the feedback pressure chamber of flow divider；No. 3 hydraulic fluid ports of selector valve successively join through tail The tenth aperture, the 11st aperture and the 12nd aperture of processing are connected to No. 2 hydraulic fluid ports of normally closed type unidirectional cutoff solenoid valve, normally closed type No. 2 hydraulic fluid ports of unidirectional cutoff solenoid valve are connected to PT mouthfuls, the third master of No. 1 hydraulic fluid port connection tail connection of normally closed type unidirectional cutoff solenoid valve Oil duct.

Above-mentioned third main oil gallery is made of the first macropore, the second macropore and third macropore being sequentially communicated；First macropore Oil inlet be connected with the second main oil gallery of work connection, the oil outlet of the first macropore connects the oil inlet of the second macropore, second The oil inlet of the oil outlet connection third macropore of macropore, the 1 of the oil outlet connection normally closed type unidirectional cutoff solenoid valve of third macropore Number hydraulic fluid port.

Off the hook control valve group, telescopic arm control valve group, rise and fall width control valve group and a left side have been installed in above-mentioned work connection Right-hand rotation control valve group；The actuator port of work connection include correspond to the off the hook hydraulic fluid port A4 of off the hook control valve group with hook up hydraulic fluid port B4, The semi-girder hydraulic fluid port A3 and contracting arm hydraulic fluid port B3 of corresponding telescopic arm control valve group, correspondence rise and fall width control valve group fall width hydraulic fluid port A2 and The right-hand rotation hydraulic fluid port A1 and left-hand rotation hydraulic fluid port B1 of width hydraulic fluid port B2, corresponding left/right rotation control valve group.

Load-sensitive mouth LS, oil inlet pressure tap MP, oil return pressure tap MT are additionally provided on above-mentioned oil inlet connection；It is also set on tail connection There is unloading port L；There are two the dampings for eliminating feedback pressure impact for installation in the third feedback hole of oil inlet connection.

The main overflow valve of remote control type is installed in above-mentioned oil inlet connection, the oil inlet end of the main overflow valve of the remote control type is connected with P mouthfuls It connects, the oil outlet of the main overflow valve of remote control type is connected with oil return opening；On-off action can be played only in energization by being equipped in tail connection The two-way stop Solenoid ball valve open in usual that can just make hydraulic system normally build pressure by closing the main overflow valve of remote control type under state.

Compared with prior art, the oil inlet connection of the utility model is machined with the oil inlet connecting for the oil outlet with oil pump P mouthfuls, tail joins the PT mouth being machined with for connection leg multi-way valve oil-feed port, and PT mouthfuls are connected with P mouthfuls, and PT mouthfuls and P mouthfuls Between oil duct on normally closed type unidirectional cutoff solenoid valve for controlling oil circuit on-off is installed, to make the supply of oil pump hydraulic oil Mode are as follows: hydraulic oil is introduced into proportional multi-way valve of getting on the bus, then the PT mouth through proportional multi-way valve tail connection of getting on the bus enters Multi-way valve with support leg. The PT mouth of the utility model could only be connected in the case where normally closed type unidirectional cutoff solenoid valves with P mouthfuls.When this is practical When novel proportional multi-way valve of getting on the bus works, in the cold situation of normally closed type unidirectional cutoff solenoid valve, because Multi-way valve with support leg does not have There is hydraulic oil supply, therefore operation Multi-way valve with support leg is invalid, it is dangerous so as to prevent from overturning because of caused by maloperation, reach peace Full purpose.

The utility model structure is simple, is quick on the draw, securely and reliably, is avoided that maloperation bring risk, be adapted to The accurate control of vehicle crane part.

Detailed description of the invention

Fig. 1 is the operation principle schematic diagram of the utility model；

Fig. 2 is the schematic view of the front view of the utility model；

Fig. 3 is the top view of Fig. 2；

Fig. 4 is the left view of Fig. 2；

Fig. 5 is the main view of oil inlet connection；

Fig. 6 is the left view of Fig. 5；

Fig. 7 is the A-A diagrammatic cross-section in Fig. 5；

Fig. 8 is the C-C diagrammatic cross-section in Fig. 7；

Fig. 9 is the G-G diagrammatic cross-section in Fig. 5；

Figure 10 is the F-F diagrammatic cross-section in Fig. 6；

Figure 11 is the main view of work connection；

Figure 12 is the left view of Figure 11；

Figure 13 is the right view of Figure 11；

Figure 14 is the main view of tail connection；

Figure 15 is the right view of Figure 14；

Figure 16 is the rearview of Figure 14；

Figure 17 is the A-A diagrammatic cross-section in Figure 14；

Figure 18 is the B-B diagrammatic cross-section in Figure 15；

Figure 19 is the C-C diagrammatic cross-section in Figure 14；

Figure 20 is the D-D diagrammatic cross-section in Figure 16；

Figure 21 is the E-E diagrammatic cross-section in Figure 15；

Figure 22 is the F-F diagrammatic cross-section in Figure 15；

Figure 23 is the G-G diagrammatic cross-section in Figure 15.

Specific embodiment

The embodiments of the present invention are described in further detail below in conjunction with attached drawing.

Fig. 1 to 23 is the principles and structure schematic diagram of the utility model.

Appended drawing reference therein are as follows: the first feedback hole F1, the second feedback hole F2, third feedback hole F3, the 4th feedback hole F4, 5th feedback hole F5, connection aperture G, the first aperture K1, second orifice K2, third aperture K3, the 4th aperture K4, the 5th aperture K5, the 6th aperture K6, the 7th aperture K7, the 8th aperture K8, the 9th aperture K9, the tenth aperture K10, the 11st aperture K11, load It is big that oilhole m, oil storage block up Y, the 1, first main oil gallery 11 of oil inlet connection, back oil road 12, the 2, second main oil gallery 21 of work connection, tail connection 3, first Hole 31, the second macropore 32, third macropore 33, flow divider 4, axial oil duct 4a, radial direction oil 4b, feedback pressure chamber 4c, annular groove Road 4d, flow divider valve core 41, little spring 42, steel ball 43, steel ball seat 44, connection oil duct 44a, big spring 45, big spring seat 46, outside valve Shell 47 adjusts bolt 48, locking cap 49, normally closed type unidirectional cutoff solenoid valve 5, selector valve 6, two-way stop Solenoid ball valve open in usual 7, the main overflow valve 8 of remote control type, damping 9.

As shown, the utility model discloses a kind of proportional multi-way valve of getting on the bus for lorry-mounted crane, the ratio of getting on the bus Example multi-way valve includes oil inlet connection 1, work connection 2 and tail connection 3, and oil inlet connection 1 and tail connection 3 are connected group with work connection 2 respectively by screw Dress up one.

Oil inlet P mouth, load-sensitive mouth LS, oil inlet pressure tap MP, oil return pressure tap MT and two are machined on oil inlet connection 1 1 mouthful and T2 mouthfuls of oil return inlet T.P mouthfuls for connecting the oil outlet of oil pump.Installation is for controlling the four of crane work in work connection 2 A valve group, four valve groups have included off the hook control valve group, telescopic arm control valve group, width control valve group of rising and falling and left/right rotation control valve Group.It works at the same time and is machined with actuator port corresponding with each valve group on connection 2.

The actuator port of work connection 2 includes having corresponded to the off the hook hydraulic fluid port A4 of off the hook control valve group and having hooked up hydraulic fluid port B4, correspondence The semi-girder hydraulic fluid port A3 and contracting arm hydraulic fluid port B3 of telescopic arm control valve group, corresponding width control valve group of rising and falling fall width hydraulic fluid port A2 and play width oil The right-hand rotation hydraulic fluid port A1 and left-hand rotation hydraulic fluid port B1 of mouth B2, corresponding left/right rotation control valve group.

The maximum contribution of the utility model is: in oil inlet connection 1 on P mouthfuls of the connection internal galleries between T1 mouthfuls and T2 mouthfuls It is machined with installation cavity, the flow divider 4 for controlling shunting in proportion for realizing P mouthfuls of oil mass is installed in the installation cavity；On tail connection 3 It is machined with the PT mouth for connection leg multi-way valve oil-feed port, the PT mouthfuls to pass sequentially through the normally closed type being mounted on tail connection 3 unidirectional The second main oil gallery 21 that third main oil gallerys that cut-off electromagnetic valve 5, tail connection 3 are formed with, work connection 2 are formed with and oil inlet connection 1 be formed with the One main oil gallery 11 is connected, and the oil inlet port of the first main oil gallery 11 is P mouthfuls；That is pass through normally closed type unidirectional cutoff for PT mouthfuls Solenoid valve 5 is connected with P mouthfuls.The utility model is provided with PT mouthfuls on tail connection 3, and the work of Multi-way valve with support leg is needed with oil by upper Vehicle proportional multi-way valve, the PT mouth through proportional multi-way valve tail connection 3 of getting on the bus enter Multi-way valve with support leg.Normally closed type unidirectional cutoff solenoid valve 5 For a kind of normally close valve, valve no power when getting on the bus proportional multi-way valve work, therefore the oil circuit being connected between PT mouthfuls and P mouthfuls is cut Disconnected, Multi-way valve with support leg does not have hydraulic oil supply.That is it when getting on the bus in running order, such as hangs and carries operating condition, at this time It is invalid to operate Multi-way valve with support leg, it is dangerous so as to prevent from overturning because of caused by maloperation, achieve the purpose that safe.PT mouthfuls and P Mouth could only be connected in the case where normally closed type unidirectional cutoff solenoid valve 5 is powered.

The load pressure that the pressure or selection work that the utility model also installs in tail connection 3 for selecting PT mouthfuls join 2 is anti- It feeds the selector valve 6 of flow divider 4, the pressure and P mouthful of pressure difference size that flow divider 4 is fed back according to selector valve 6 determine that P mouthfuls are divided It flow to the oil mass ratio of oil return opening.

In embodiment, as shown in Figure 7, Figure 8, the flow divider 4 of the utility model is by flow divider valve core 41, little spring 42, steel ball 43, steel ball seat 44, big spring 45, valve shell 47, adjust bolt 48 and the composition of locking cap 49 at big spring seat 46；Installation cavity is upper The cavity of lower perforation, flow divider valve core 41 are slidably arranged in installation cavity, and the lower accent spiral of installation cavity is equipped with oil storage and blocks up Y, The stifled Y of oil storage is matched with flow divider valve core 41 is formed with the P mouth pressure chamber for acting on 41 lower end of flow divider valve core.Valve shell 47 is mounted on The upper accent of installation cavity, which, which matches to be formed with the upper accent of installation cavity, acts on the anti-of 41 upper end of flow divider valve core Present pressure chamber 4c；Axial axial oil duct 4a and the company for being machined with connection P mouthfuls of pressure chambers and feedback pressure chamber 4c of flow divider valve core 41 To the radial direction oil 4b of oil duct 4a, radial direction oil 4b is connected axis with the first main oil gallery 11；Little spring 42 and steel ball 43 are through steel Pearl 44 unidirectional liquid of seat are hermetically fitted in the upper port of axial oil duct 4a, and little spring 42, steel ball 43 and steel ball seat 44 constitute Prevent hydraulic oil from entering the check valve of feedback pressure chamber 4c from axial oil duct 4a.Big spring 45 and big spring seat 46 are installed in instead It presents in pressure chamber 4c, and the upper end phase apical grafting of one end of big spring 45 and flow divider valve core 41,45 other end of big spring and big bullet 46 phase apical grafting of spring abutment；It adjusts 48 spiral of bolt to be mounted on valve shell 47, and adjusts bolt 48 and extend into feedback pressure chamber 4c In top surface phase apical grafting with big spring seat 46,49 spiral of locking cap be mounted on adjust on bolt 48 and with outside valve shell 47 End face phase apical grafting.Big spring 45 can be compressed by rotation press big spring seat 46 to adjust the work of flow divider 4 by adjusting bolt 48 Pressure.

The utility model is machined with back oil road 12 for being connected to T1 mouthfuls He T2 mouthfuls in oil inlet connection 1, on flow divider valve core 41 It is machined with when flow divider valve core 41 is moved up for linking up back oil road 12 and the first main oil gallery 11 to realize what P mouthfuls of oil masses shunted Annular channel 4d；The feedback pressure of selector valve 6 is transferred in feedback pressure chamber 4c；Feedback pressure chamber can be made by being provided on steel ball seat 44 The pressure oil fed back in 4c pushes the connection oil duct 44a that steel ball 43 enters axial oil duct 4a open.The flow divider valve core 41 of the utility model When being in initial position, P mouthful are the state being cut off with T1 mouthfuls, T2 mouthfuls of oil circuit.

In embodiment as shown in Fig. 1 and Figure 19 to Figure 23, there are three hydraulic fluid ports for the tool of selector valve 6 of the utility model, in which: The first aperture K1, second orifice K2, third aperture K3 and the work connection 2 that No. 1 hydraulic fluid port of selector valve 6 successively joins 3 processing through tail add The load oilhole m of work is connected, and the pressure of load oilhole m is derived from the pressure of 2 load of work connection.Load oilhole m connection work The feedback oil duct of four valve groups in connection 2.Fourth aperture K4, fiveth aperture of No. 2 hydraulic fluid ports of selector valve 6 successively through 3 processing of tail connection K5, the 6th aperture K6, the 7th aperture K7, the 8th aperture K8, the 9th aperture K9, the connection aperture G of work connection processing, oil inlet connection add The first feedback hole F1, the second feedback hole F2, third feedback hole F3, the 4th feedback hole F4 and the 5th feedback hole F5 of work are connected to point Flow the feedback pressure chamber 4c of valve 4；Tenth aperture K10, ten one aperture of No. 3 hydraulic fluid ports of selector valve 6 successively through 3 processing of tail connection No. 2 hydraulic fluid ports of K11 and the 12nd aperture K12 connection normally closed type unidirectional cutoff solenoid valve 5, the 2 of normally closed type unidirectional cutoff solenoid valve 5 Number hydraulic fluid port is connected to PT mouthful, and No. 1 hydraulic fluid port connection tail of normally closed type unidirectional cutoff solenoid valve 5 joins 3 third main oil gallery.

Third main oil gallery in tail connection is made of the first macropore 31, the second macropore 32 and third macropore 33 being sequentially communicated； The oil inlet of first macropore 31 is connected with the second main oil gallery 21 of work connection 2, and the oil outlet connection of the first macropore 31 is second largest The oil inlet in hole 32, the oil inlet of the oil outlet connection third macropore 33 of the second macropore 32, the oil outlet connection of third macropore 33 No. 1 hydraulic fluid port of normally closed type unidirectional cutoff solenoid valve.

Unloading port L is additionally provided on tail connection 3；There are two for eliminating feedback pressure for installation in the third feedback hole F3 of oil inlet connection 1 The damping 9 of power impact.

The main overflow valve 8 of remote control type is installed in oil inlet connection 1, the oil inlet end of the main overflow valve 8 of the remote control type is connected with P mouthfuls, The oil outlet of the main overflow valve 8 of remote control type is connected with oil return opening；On-off action can be played only in the shape of energization by being equipped in tail connection 3 The two-way stop Solenoid ball valve 7 open in usual that can just make hydraulic system normally build pressure by closing the main overflow valve 8 of remote control type under state.

The utility model reaches the normal work of get on the bus proportional multi-way valve and Multi-way valve with support leg by logical relation, when upper When vehicle proportional multi-way valve works, in the cold situation of normally closed type unidirectional cutoff solenoid valve 5, operation Multi-way valve with support leg is invalid, keeps away Exempt to overturn, it is safe to achieve the purpose that.In addition the system pressure of the utility model vehicle needs two-way section open in usual of 2/2-way The only energization of Solenoid ball valve 7 could establish pressure, and hydraulic system will work, then two-way stop Solenoid ball valve open in usual 7 just needs It is powered.

There are two kinds of operating conditions for the embodiments of the present invention: Multi-way valve with support leg work and proportional multi-way valve work of getting on the bus, this The connection type of utility model oil circuit and conventional system are inconsistent, and conventional system is the advanced Multi-way valve with support leg of oil of oil pump again into upper Vehicle proportional multi-way valve, the utility model are advanced proportional multi-way valves of getting on the bus again into Multi-way valve with support leg.

One, operating condition 1: when Multi-way valve with support leg works, the normally closed type unidirectional cutoff electromagnetism that needs to get on the bus on proportional multi-way valve Valve 5 and two-way stop Solenoid ball valve 7 open in usual are all powered, at this time oil pump come out hydraulic oil enter oil inlet connection 1 P mouth, i.e., into Enter the first main oil gallery 11 of oil inlet connection 1, then the third master by the first main oil gallery 11, the second main oil gallery 21 of work connection 2, tail connection 3 Oil duct is connected to No. 1 mouth of normally closed type unidirectional cutoff solenoid valve 5, because normally closed type unidirectional cutoff solenoid valve 5 has been powered, then No. 1 mouth of normally closed type unidirectional cutoff solenoid valve 5 and No. 2 mouths of normally closed type unidirectional cutoff solenoid valve 5 communicate, and normally closed type is unidirectional No. 2 mouths of cut-off electromagnetic valve 5 are connected with PT mouthfuls again, and P mouth and the PT mouth on tail connection of the connection of oil inlet at this time are connection, and PT mouthfuls are to connect Connect the oil-feed port of Multi-way valve with support leg, it is meant that the hydraulic oil of oil pump can enter Multi-way valve with support leg.

Because proportional multi-way valve of getting on the bus is that proportional-type multi-way valve is suitable for Constant Pump System, constant displacement pump is in big flow always Output state, so need to be arranged flow divider 4 to meet the low pressure diverter function under off working state, i.e., when valve group does not work, The hydraulic oil of oil inlet P mouth can branch to 1 mouthful and T2 mouthfuls of oil return inlet T with low pressure, then just needing a pressure feedback signal, promote 4 flow divider valve core 41 of flow divider is set to shunt or not shunt less.As shown in fig. 7, P mouthfuls are connected with the first main oil gallery 11, the first main oil gallery 11 hydraulic oil leads to P mouthfuls of pressure chambers and feedback pressure chamber by the radial direction oil 4b and axial direction oil duct 4a on flow divider valve core 41 4c.Since the upper end of axial oil duct 4a is equipped with steel ball 43, pressure cannot reach feedback pressure chamber 4c outside, and hydraulic oil is locked in 41 inside of flow divider valve core and P mouthfuls of pressure chambers, the pressure of P mouthfuls of pressure chambers force flow divider valve core 41 to have the tendency that up moving.At this time It is normally closed because the oil filling capacity of normally closed type unidirectional cutoff solenoid valve 5 is big in 5 energized state of normally closed type unidirectional cutoff solenoid valve No. 2 mouth pressure of formula unidirectional cutoff solenoid valve 5 are more slightly lower compared with No. 1 mouth of normally closed type unidirectional cutoff solenoid valve 5, such as Figure 20 institute Show, No. 2 mouths of normally closed type unidirectional cutoff solenoid valve 5 pass sequentially through the 12nd aperture K12, the 11st aperture K11 and the tenth aperture K10 is connect with No. 3 mouths of selector valve 6, because the work connection 2 for proportional multi-way valve of getting on the bus does not operate, load pressure useless Pass to No. 1 mouth of selector valve 6, No. 1 mouth of selector valve 6 and No. 2 mouths closings, selector valve 6 is by normally closed type unidirectional cutoff solenoid valve 5 No. 2 mouth pressure be transferred to No. 2 mouths of selector valve 6, successively through the 4th aperture K4, the 5th aperture K5, the 6th aperture K6, the 7th small Hole K7, the 8th aperture K8, the 9th aperture K9, connection aperture G, the first feedback hole F1, the second feedback hole F2, third feedback hole F3, 4th feedback hole F4 and the 5th feedback hole F5 are transferred to feedback pressure chamber 4c.

Because P mouthfuls of pressure ratio of the pressure that No. 2 mouths of normally closed type unidirectional cutoff solenoid valve 5 pass over is small, shunt Steel ball 43 inside 41 upper end of spool is remained for closed state, but adds the spring force of the big spring 45 as shown on Fig. 7, The power for acting on 41 upper end of flow divider valve core is greater than the power of lower end, causes flow divider valve core 41 that can not move up, to make to enter P mouthfuls All hydraulic oil fully enters PT mouthfuls of inflow Multi-way valve with support leg, and Multi-way valve with support leg can work normally.

Two, operating condition 2: when proportional multi-way valve of getting on the bus works, two-way stop Solenoid ball valve 7 open in usual is powered, and normally closed type is unidirectional 5 no power of cut-off electromagnetic valve, as shown in Figure 1, the hydraulic oil of oil inlet P mouth is truncated towards PT mouthfuls of channel, Multi-way valve with support leg It can not work, i.e. operation is invalid, achievees the purpose that safe, and No. 2 mouths of normally closed type unidirectional cutoff solenoid valve 5 are also transmitted without pressure To No. 3 mouths of selector valve 6.

Work connection 2 is operated, the load pressure of generation is transferred to the load oilhole m of work connection shown in Figure 12 2, then passes It is handed to the third aperture K3 of the connection of tail shown in Figure 15 and Figure 22 3, passes through the second orifice K2 and the first aperture K1 on Figure 22 and Figure 20 It is connected with No. 1 mouth of selector valve 6, because No. 3 mouths of selector valve 6 do not have pressure signal, No. 2 mouths and No. 3 mouths of selector valve 6 Closing, No. 2 mouths of selector valve 6 select the pressure output of No. 1 mouth, by Figure 20 and Figure 19 it is found that No. 2 mouths of selector valve 6 pass through 4th aperture K4, the 5th aperture K5, the 6th aperture K6, the 7th aperture K7, the 8th aperture K8, the 9th aperture K9, connection aperture G, First feedback hole F1, the second feedback hole F2, third feedback hole F3, the 4th feedback hole F4 and the 5th feedback hole F5 are transferred to feedback pressure Power chamber 4c.The pressure of No. 2 mouths feedback of selector valve 6 and the size of P mouthfuls of pressure difference determine the size of 41 shunt volume of flow divider valve core, i.e., Pressure difference is big, and flow divider valve core 41 is big toward the mobile amount in upper end, and the P mouthfuls of flows for branching to oil return opening are big, the working oil of supply work connection 2 The flow of mouth is small, then execution movement is just slow, conversely, the flow that flow divider valve core 41 is diverted to oil return opening is small, supply work joins 2 works The flow for making hydraulic fluid port is big, and execution movement is just fast, and for simple, the spool displacement of valve group is small in work connection 2, and pressure difference is big, work Hydraulic fluid port output flow is small, executes slow motion, and the spool displacement of valve group is big in work connection 2, and pressure difference is small, and working hole output flow is big, Execution movement is fast, and the spool displacement amount of valve group is zero in work connection 2, pressure feedback zero, and pressure difference reaches maximum, working hole output The hydraulic oil whole low pressure that flow is zero, P mouthfuls branches to oil return opening.

The above, only the preferred embodiments of the present invention, but scope of protection of the utility model is not limited thereto, Anyone skilled in the art within the technical scope disclosed by the utility model, the variation that can readily occur in or replaces It changes, should all be covered by scope of protection of the utility model.

Claims (8)

1. a kind of proportional multi-way valve of getting on the bus for lorry-mounted crane, including be sequentially connected oil inlet connection (1), work connection (2) and Tail joins (3)；The oil inlet connection (1) is machined with oil inlet P mouth and 1 mouthful and T2 mouthfuls of two oil return inlet Ts；The work joins (2) It is machined with the actuator port for controlling crane work；It is characterized in that: the oil inlet joins (1) and tail connection (3) passes through screw It is integral with work connection (2) assembled end respectively；P mouthfuls of the connection inside between T1 mouthfuls and T2 mouthfuls in the oil inlet connection (1) It is machined with installation cavity on oil duct, the flow divider (4) for realizing the control of oil mass ratio is installed in the installation cavity；Described It is machined with PT mouth for connection leg multi-way valve oil-feed port on tail connection (3), the PT mouthfuls passes sequentially through and be mounted on tail and join on (3) Normally closed type unidirectional cutoff solenoid valve (5), the third main oil gallery of tail connection (3), the second main oil gallery (21) of work connection (2) and oil inlet join The first main oil gallery (11) be connected, the oil inlet port of first main oil gallery (11) is P mouthfuls；Pacify on the tail connection (3) Fill selector valve (6) of the load pressure feedback to flow divider (4) that pressure or selection work for selecting PT mouthfuls join (2).

2. a kind of proportional multi-way valve of getting on the bus for lorry-mounted crane according to claim 1, it is characterized in that: point Flow valve (4) by flow divider valve core (41), little spring (42), steel ball (43), steel ball seat (44), big spring (45), big spring seat (46), Valve shell (47) adjusts bolt (48) and locking cap (49) composition；The installation cavity is cavity up and down, point Flow valve core (41) is slidably arranged in installation cavity, and the lower accent spiral of the installation cavity is equipped with oil storage and blocks up (Y), described Oil storage stifled (Y) is matched with flow divider valve core (41) is formed with the P mouth pressure chamber for acting on flow divider valve core (41) lower end；The valve Shell (47) is mounted on the upper accent of installation cavity, which matches to be formed with the upper accent of installation cavity and act on point The feedback pressure chamber (4c) of flow valve core (41) upper end；The flow divider valve core (41) is axially machined with P mouthful pressure chambers of connection and instead It presents the axial oil duct (4a) of pressure chamber (4c) and is connected to the radial direction oil (4b) of axial oil duct (4a), the radial direction oil (4b) is connected with the first main oil gallery (11)；The little spring (42) and steel ball (43) through the unidirectional liquid of steel ball seat (44) hermetically It is fitted in the upper port of axial oil duct (4a)；The big spring (45) and big spring seat (46) is installed in feedback pressure chamber In (4c), and the upper end phase apical grafting of one end of big spring (45) and flow divider valve core (41), big spring (45) other end and big bullet Spring abutment (46) phase apical grafting；Described adjusting bolt (48) spiral is mounted on valve shell (47), and is adjusted bolt (48) and protruded into To in feedback pressure chamber (4c) with the top surface phase apical grafting of big spring seat (46), the locking cap (49) spiral is mounted on adjusting spiral shell On bolt (48) and with valve shell (47) outer end face phase apical grafting.

3. a kind of proportional multi-way valve of getting on the bus for lorry-mounted crane according to claim 2, it is characterized in that: it is described into It is machined with the back oil road (12) for being connected to T1 mouthfuls He T2 mouthfuls in oil connection (1), is machined with and is dividing on the flow divider valve core (41) The annular of P mouthfuls of oil masses shunting is realized when flow valve core (41) moves up for linking up back oil road (12) and the first main oil gallery (11) Conduit (4d)；The feedback pressure of the selector valve (6) is transferred in feedback pressure chamber (4c)；It is opened on the steel ball seat (44) Having can make the pressure oil fed back in feedback pressure chamber (4c) push the connection oil duct that steel ball (43) enter axial oil duct (4a) open (44a)。

4. a kind of proportional multi-way valve of getting on the bus for lorry-mounted crane according to claim 3, it is characterized in that: the choosing Valve (6) tool is selected there are three hydraulic fluid port, in which: first aperture (K1) of No. 1 hydraulic fluid port of selector valve (6) successively through tail connection (3) processing, the Two apertures (K2), third aperture (K3) are connected with the load oilhole (m) of work connection (2) processing, the load oilhole (m) Pressure is derived from the pressure of work connection (2) load；No. 2 hydraulic fluid ports of the selector valve (6) are successively through the 4th small of tail connection (3) processing Hole (K4), the 5th aperture (K5), the 6th aperture (K6), the 7th aperture (K7), the 8th aperture (K8), the 9th aperture (K9), work Join processing connection aperture (G), oil inlet connection processing the first feedback hole (F1), the second feedback hole (F2), third feedback hole (F3), 4th feedback hole (F4) and the 5th feedback hole (F5) are connected to the feedback pressure chamber (4c) of flow divider (4)；The selector valve (6) No. 3 hydraulic fluid ports successively through tail connection (3) processing the tenth aperture (K10), the 11st aperture (K11) and the 12nd aperture (K12) company No. 2 hydraulic fluid ports of usual enclosed unidirectional cutoff solenoid valve (5), No. 2 hydraulic fluid ports connection of the normally closed type unidirectional cutoff solenoid valve (5) PT mouthfuls, the third main oil gallery of No. 1 hydraulic fluid port connection tail connection (3) of the normally closed type unidirectional cutoff solenoid valve (5).

5. a kind of proportional multi-way valve of getting on the bus for lorry-mounted crane according to claim 4, it is characterized in that: described Three main oil gallerys are made of the first macropore (31), the second macropore (32) and third macropore (33) being sequentially communicated；First macropore (31) Oil inlet be connected with the second main oil gallery (21) of work connection (2), the oil outlet of the first macropore (31) connects the second macropore (32) oil inlet, the second macropore (32) oil outlet connection third macropore (33) oil inlet, third macropore (33) it is fuel-displaced No. 1 hydraulic fluid port of mouth connection normally closed type unidirectional cutoff solenoid valve.

6. a kind of proportional multi-way valve of getting on the bus for lorry-mounted crane according to claim 5, it is characterized in that: the work Work, which joins, has been equipped with off the hook control valve group, telescopic arm control valve group, width control valve group of rising and falling and left/right rotation control valve group in (2)； The actuator port of the work connection (2) includes having corresponded to the off the hook hydraulic fluid port A4 of off the hook control valve group and having hooked up hydraulic fluid port B4, correspondence The semi-girder hydraulic fluid port A3 and contracting arm hydraulic fluid port B3 of telescopic arm control valve group, corresponding width control valve group of rising and falling fall width hydraulic fluid port A2 and play width oil The right-hand rotation hydraulic fluid port A1 and left-hand rotation hydraulic fluid port B1 of mouth B2, corresponding left/right rotation control valve group.

7. a kind of proportional multi-way valve of getting on the bus for lorry-mounted crane according to claim 6, it is characterized in that: it is described into Load-sensitive mouth LS, oil inlet pressure tap MP, oil return pressure tap MT are additionally provided on oil connection (1)；It is additionally provided with and unloads on the tail connection (3) Lotus mouthful L；There are two the dampings for eliminating feedback pressure impact for installation in the third feedback hole (F3) of the oil inlet connection (1) (9)。

8. a kind of proportional multi-way valve of getting on the bus for lorry-mounted crane according to claim 7, it is characterized in that: it is described into The main overflow valve of remote control type (8) is installed in oil connection (1), the oil inlet end of the main overflow valve of the remote control type (8) is connected with P mouthfuls, remote control The oil outlet of the main overflow valve of formula (8) is connected with oil return opening；On-off action can be played only logical by being equipped in the tail connection (3) The two-way stop electromagnetism open in usual that can just make hydraulic system normally build pressure by closing the main overflow valve of remote control type (8) in the state of electricity Ball valve (7).