CN108716494A - A kind of concrete pumping equipment high-low pressure automatic switching valve and hydraulic system - Google Patents
A kind of concrete pumping equipment high-low pressure automatic switching valve and hydraulic system Download PDFInfo
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- CN108716494A CN108716494A CN201810780986.7A CN201810780986A CN108716494A CN 108716494 A CN108716494 A CN 108716494A CN 201810780986 A CN201810780986 A CN 201810780986A CN 108716494 A CN108716494 A CN 108716494A
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- valve
- valve body
- oil
- mandril
- hydraulic fluid
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- 238000005086 pumping Methods 0.000 title claims abstract description 25
- 239000012530 fluid Substances 0.000 claims abstract description 85
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 21
- 239000003921 oil Substances 0.000 claims description 87
- 239000002828 fuel tank Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims 1
- 210000004907 gland Anatomy 0.000 abstract description 11
- 238000006243 chemical reaction Methods 0.000 description 11
- 238000012423 maintenance Methods 0.000 description 5
- 241000009298 Trigla lyra Species 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
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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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
-
- 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
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
Abstract
A kind of concrete pumping equipment high-low pressure automatic switching valve of present invention offer and hydraulic system, including at least two hydraulic control valves, v1 and v2 a pair of the check valves being arranged in hydraulic control valve body, the inner cavity of check valve by being divided into valve body cavity and mandril chamber inside outside, it is correspondingly arranged on check valve body and mandril, gland closed valve inner cavity is simultaneously connect by resetting spring with check valve body, the stroke of check valve body movement, valve body chamber when check valve body is in range are divided between gland and check valve body；Valve body cavity wall is provided with hydraulic fluid port；Through-hole connection mandril chamber is provided between the mandril end face of v1 and the mandril end face of v2, through-hole side wall sets oil-control hole；Channel is provided between v1, v2 mandril chamber, hydraulic oil enters oil-control hole by pushing mandril to make check valve body to gland slip, and to open valve body cavity, two hydraulic fluid ports realize connection.It is the configuration of the present invention is simple, easy to operate, it can realize the quick commutation work of high-low pressure.
Description
Technical field
The invention belongs to engineering machinery fields, and in particular to a kind of concrete pumping equipment (including pump truck, Vehicle loaded pump and mixed
Solidifying soil drag pump) high-low pressure automatic switching valve and hydraulic system.
Technical background
Currently, concrete pumping equipment (including pump truck, Vehicle loaded pump and concrete pump), according to construction height, distance and
The requirement of conveying capacity, need using be pumped by with low pressure pump mutually switching, the present high low switching of concrete pumping equipment
There are three types of methods, one is using valve block is rotated, manually switches, the disadvantage is that manual operation is needed, troublesome, time length and people
Leakage pressure oil when work operates pollutes environment, also dangerous.Second is that switching high-low pressure using two six-way valves, the disadvantage is that cost
Height, since pipeline is long, easy heat causes hydraulic fluid temperature high, generates oil seepage phenomena, cause equipment sometimes cannot normal work
Make.The third is to use multiple inserting Vavle switchings, the disadvantage is that high, of high cost, easy to hydraulic oil, fluid pressure line required precision
Bad, repair inconvenience, maintenance cost is high, and difficulty is big, requires the technology of maintenance personal high.
Invention content
In order to overcome drawbacks described above, provide a kind of concrete pumping equipment high-low pressure automatic switching valve and hydraulic system with
Meet easy switching, easy to maintenance, operationally reliable requirement.
In order to achieve the above object, which includes at least two hydraulic controls
Valve；The hydraulic control valve includes two separate check valve V1 and V2, in the inner cavity of the check valve by dividing inside outside
For valve body cavity, seal chamber and mandril chamber, seal chamber is provided between the valve body cavity and the mandril chamber；
Resetting spring and check valve body, the setting of check valve body nearly mandril chamber side are provided in the valve body cavity；
Piston mandril intracavitary setting mandril and be integrally coaxially disposed, the remote valve body cavity side setting of the piston；
Further include an excessively oily channel, the excessively oily channel is connected to two mandril chambers；
The check valve body is sequentially divided into guide section, excessively oily section and seal section in an axial direction, and the guide section is close to described multiple
Position spring one end；
The check valve body pushes the mandril chamber under the action of the resetting spring, and the seal section and seal chamber are close
Envelope cooperation；
The position for corresponding to the excessively oily section in the valve body cavity wall offered oily hydraulic fluid port；
The mandril length is more than the valve body slides stroke length；
The mandril chamber end of check valve V1 and the mandril chamber end set of check valve V2 have oil-control hydraulic fluid port；
When no hydraulic oil enters the control port, due to the effect of resetting spring, the check valve body is maintained at institute
It states in valve body cavity close to mandril chamber one end, is closed between the mandril chamber and the valve body cavity；
When high pressure liquid pressure oil is into mandril chamber described in the control port, hydraulic oil pushes the piston of the mandril to make institute
It states mandril to move to valve body cavity direction, pushes the check valve body to be moved to resetting spring direction so as to cause the mandril, make
The valve body cavity is connected to the mandril chamber, thus the excessively oily hydraulic fluid port of check valve V1, V1 valve body cavities, V1 mandrils chamber, excessively oily channel,
V2 mandrils chamber, V2 valve body cavities, the oily of V2 cross oil phase connection；
Further, the check valve V1 and check valve V2 is coaxially oppositely arranged, and each mandril position is close；
Further, the setting connection block on the outside of hydraulic control valve body, by the mandril of the check valve V1 and check valve V2
Chamber is connected to；
Further；The one-way valve axis of hydraulic control valve described in two is arranged in parallel.
A kind of hydraulic system for concrete pumping equipment made using high-low pressure switching valve：
The system includes oil cylinder G1, oil cylinder G2 and high-low pressure automatic switching valve Z1, high-low pressure automatic switching valve Z2, high-low pressure
Automatic switching valve Z3 and two way selected valve D1 and two way selected valve D2；The oil cylinder G1, the oil cylinder G2 are both provided with piston
Bar；
The high-low pressure automatic switching valve Z2's is provided with high voltage control hydraulic fluid port K21 and low voltage control hydraulic fluid port K22,
High voltage control hydraulic fluid port K21 controls B21, B22 hydraulic fluid port, and low voltage control hydraulic fluid port K22 controls B23, B24；
The high-low pressure automatic switching valve Z1's is provided with high voltage control hydraulic fluid port K11 and low voltage control hydraulic fluid port K12,
High voltage control hydraulic fluid port K11 controls B11, B12 hydraulic fluid port, and low voltage control hydraulic fluid port K12 controls B13, B14；
The high-low pressure automatic switching valve Z3's is provided with high voltage control hydraulic fluid port K31 and low voltage control hydraulic fluid port K32,
High voltage control hydraulic fluid port K31 controls B31, B32 hydraulic fluid port, and low voltage control hydraulic fluid port K32 controls B33, B34；
B21, B14 are connected to by oil pipe with the rod chamber of oil cylinder G1 respectively；
B23, B12 are connected to by oil pipe with the rodless cavity of oil cylinder G1 respectively；
B22, B34 are connected to by oil pipe with the rod chamber of oil cylinder G2 respectively；
B24, B32 are connected to by oil pipe with the rodless cavity of oil cylinder G2 respectively；
B11, B13 are connected in parallel in the work oil outlet d1 of two way selected valve D1；
B31, B33 are connected in parallel in the work oil outlet d2 of two way selected valve D1；
The oil inlet of two way selected valve D1 is connect by oil inlet pipe with oil pump, and the oil return opening of two way selected valve D1 is by returning
Oil pipe line is connect with fuel tank；
K11, K21, K31 are connected in parallel in the work oil inlet f1 of two way selected valve D2；
K12, K22, K32 are connected in parallel in the work oil inlet f2 of two way selected valve D2；
The oil inlet of two way selected valve D2 is connect by oil inlet pipe with oil pump, and the oil return opening of two way selected valve D2 is by returning
Oil pipe line is connect with fuel tank.
Since the present invention is provided with high and low pressure job control hydraulic fluid port at mandril end, pressure fluid can be worked by high and low pressure
Control port enters valve body and mandril, mandril is pushed to push check valve body, and the connection so as to open valve body cavity and mandril chamber is led to
Road；Due to being connected between the mandril chamber of v1 and the mandril chamber of v2, it is thus achieved that the connection between two valve body cavities；Because of valve
Body cavity is provided with the external hydraulic fluid port of communicating valve, so final result leads to the connection between two hydraulic fluid ports；Without pressure fluid
Into being blocking state between fashionable hydraulic fluid port, hydraulic system can pass through reversal valve by the oil inlet of high and low pressure job control hydraulic fluid port
It easily controls, changes flow direction of the hydraulic oil in pipeline by changing the combination of hydraulic fluid port connection, and then change liquid
The working condition of cylinder pressure；Realize the conversion of high-low pressure working condition.
The present invention have it is simple in structure, it is easy to operate, can be switched fast automatically concrete pumping equipment high-low pressure switching work
To make, reliable operation, volume is few, hydraulic oil ne-leakage, at low cost, low to the technology requirement of maintenance personal, easy to maintenance, while because
It is not easy heat without pipeline, hydraulic oil.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples
Fig. 1 is the front view of concrete pumping equipment high-low pressure automatic switching valve
Fig. 2 is the vertical view of Fig. 1
Fig. 3 is the left view of Fig. 1
Fig. 4 is to be pumped by under working condition Fig. 1 along the sectional view of line A-A
Fig. 5 is Fig. 1 under low pressure pumping working condition along the sectional view of line A-A
Fig. 6 is the B-B sectional views of Fig. 2
Fig. 7 is the C-C sectional views of Fig. 4
Fig. 8 is to be pumped by under working condition Fig. 4 along the sectional view of line D-D
Fig. 9 is to be pumped by under working condition Fig. 4 along the sectional view of E-E lines
Figure 10 is Fig. 5 under low pressure pumping working condition along the sectional view of F-F
Figure 11 is Fig. 5 under low pressure pumping working condition along the sectional view of G-G lines
Figure 12 is the main hydraulic system schematic diagram that pumping equipment uses high-low pressure automatic switching valve
Figure 13 is pumping equipment (pump truck, Vehicle loaded pump, concrete pump) main electric system schematic diagram
In figure,
In figure, 1-gland I；2-high-low pressures convert valve body；3-connection blocks I；4-glands II；5-glands III；6-even
Logical block II；7-glands IV；8-resetting springs III；9-check valve bodies III；10-mandrils III；11-mandrils IV；12-check valves
Body IV；13-resetting springs IV；14-resetting springs II；15-check valve bodies II；16-mandrils II；17-mandrils I；18-is mono-
To valve body I；19-resetting springs I；20-fuel tanks；21-liquid level gauges；22-air filters；23-oil absorption filters；24-oil returns
Filter；25-motors；26-constant output pumps；27-coolers；28-throttle valves；29-overflow valves；30-pressure gauges；31—
Electro-hydraulic reversing valve；32.1-high-low pressure automatic switching valves I；32.2-high-low pressure automatic switching valves II；32.3-high-low pressures are automatic
Switching valve III；33-oil cylinders I；34-oil cylinders II；35-solenoid directional control valves；36-pipelines I；37-pipelines II；38-pipelines III；
39-pipelines IV；40-master cylinder, I piston rod；41-master cylinder, II piston rod；42-motor stop buttons；43-electric motor startings
Button；44-pumping stop buttons；45-pumping buttons；46-counter pump button；47-low pressure switching push buttons
X1-high-pressure work control port；X2-operating on low voltage control port；
B1, B2, B3, B4 are high-low pressure automatic switching valve hydraulic fluid port；
A1, A2, A3, A4 are oil pocket；
C1, C2, C3, C4, C5, C6, C7, C8, C9, C10 oil circuit in order to control；
K1, K2 are close to switch；
KM1 is ac contactor mouth；
KA1, KA2, KA3 are contactor；
Specific implementation mode
Embodiment is described further below in conjunction with the accompanying drawings.
Embodiment
The present embodiment provides a kind of embodiments of the present invention,
See shown in Fig. 1-Figure 11, the both sides that valve body 2 is converted in high-low pressure are provided with connection block I 3 and are connected to block II 6, are connected to
High-low pressure is converted the A1 chambers in valve body 2 and be connected to A2 chambers by block I 3, connection block II 6 height is pressed change A3 chambers in valve body 2 and
A4 chambers are connected to；
Left side in high-low pressure conversion valve body 2, is arranged in parallel with check valve body I 18, check valve body III 9, in check valve
The left side of body I 18 is provided with resetting spring I 19, and the other end of resetting spring I 19 is connected with gland I, on the right side of check valve I 18
It is provided with mandril I 17；
The left side of check valve III 9 is provided with resetting spring III 8, the other end of resetting spring III 8 is connected with gland III 5,
The right side of check valve body III 9 is provided with mandril III 10；
Right side in high-low pressure conversion valve body 2, is arranged in parallel with check valve body II 15, check valve body IV 12；
The right side of check valve body II 15 is provided with resetting spring II 14, the other end and the gland II 4 of resetting spring II 14
It is connected, the left side of check valve body II 15 is provided with mandril II 16；
The right side of check valve body IV 12 is provided with resetting spring IV 13, the other end and the gland IV 7 of resetting spring IV 13
It is connected, the left side of check valve body IV 12 is provided with mandril IV 11；
It is provided with high-pressure work control port X1, operating on low voltage control port X2 on high-low pressure conversion valve body 2.In height
It is provided with hydraulic fluid port B1, hydraulic fluid port B2, hydraulic fluid port B3, hydraulic fluid port B4 on pressure conversion valve body 2,
As shown in figure 12, there are three high for setting in pumping equipment (pump truck, Vehicle loaded pump, concrete pump) main hydraulic system
Low pressure automatic switching valve 32.1, high-low pressure automatic switching valve 32.2, high-low pressure automatic switching valve 32.3.Motor 25 and constant output pump
26 are connected, and constant output pump 26 is connected by oil absorption filter 23 with fuel tank 20, and constant output pump 26 is changed by pipeline I 36 with electro-hydraulic
It is connected to valve 31, electro-hydraulic reversing valve 31 is connected by pipeline II 37 with hydraulic fluid port B1, B3 of high-low pressure automatic switching valve 32.1, height
The hydraulic fluid port B2 of pressure automatic switching valve 32.1 is connected with the rodless cavity of master cylinder I 33, the B4 hydraulic fluid ports of high-low pressure automatic switching valve 32.1
It is connected with the rod chamber of master cylinder I 33.
Electro-hydraulic reversing valve 31 is connected by pipeline III 38 with hydraulic fluid port B1, B3 of high-low pressure automatic switching valve 32.2, high-low pressure
The hydraulic fluid port B2 of automatic switching valve 32.2 is connected with the rodless cavity of master cylinder II 34, the hydraulic fluid port B4 of high-low pressure automatic switching valve 32.2 with
The rod chamber of master cylinder II 34 is connected.
The rod chamber of master cylinder I 33 is connected with the hydraulic fluid port B1 of high-low pressure automatic switching valve 32.3, the rodless cavity of master cylinder I 33
It is connected with the hydraulic fluid port B3 of high-low pressure automatic switching valve 32.3, hydraulic fluid port B2 and the master cylinder II 34 of high-low pressure automatic switching valve 32.3
Rod chamber is connected；
The hydraulic fluid port B4 of high-low pressure automatic switching valve 32.3 is connected with the rodless cavity of master cylinder II 34；
Control oil IV 39 is connected by the road with solenoid directional control valve 35, solenoid directional control valve 35 by control piper C1, C3, C4,
The high pressure of C9, C10 and high-low pressure automatic switching valve 32.1, high-low pressure automatic switching valve 32.2, high-low pressure automatic switching valve 32.3
Job control hydraulic fluid port X1 is connected, and solenoid directional control valve 35 passes through control piper C2, C5, C6, C7, C8 and high-low pressure automatic switching valve
32.1, high-low pressure automatic switching valve 32.2, the operating on low voltage control port X2 of high-low pressure automatic switching valve 32.3 are connected, electro-hydraulic to change
It is connected to valve 31 with fuel tank 20 by throttle valve 28, cooler 27, return filter 24 with the oil return of overflow valve 29；Electromagnetic switch
The oil return of valve 35 is connected with fuel tank 20.
Use concrete pumping equipment provided by the invention (pump truck, Vehicle loaded pump, concrete pump) high-low pressure automatic conversion
When valve, electric motor starting button 43, driving 26 fuel feeding of constant output pump are pressed, presses pumping button 45 at this time, 1DT energizations, 2DT, 3DT are disconnected
Electricity；
Electro-hydraulic reversing valve 1 is in left position, solenoid directional control valve 35 in right position at this time, and control oil IV 39 enters electromagnetism by the road at this time
35 right position of reversal valve, control oil circuit C1, C3, C4, C9, C10 enter high-low pressure automatic switching valve I 32.1, high-low pressure from turn
The high-pressure work control port X1 for changing valve II 32.2, high-low pressure automatic switching valve III 32.3, enters high-pressure work control port
The control hydraulic oil of X1 pushes mandril I 17, mandril II 16 to be moved to both sides, and check valve body is pushed by mandril I 17, mandril II 16
I 18, check valve body II 15 is moved to both sides, and compression reseting spring I 19, resetting spring II 14 are moved to gland I 1, gland II 4
It is dynamic, while hydraulic fluid port B1, the oil pocket A1 on high-low pressure automatic switching valve I 32.1, II 32.2, III 32.3 are passed through into link block I 3 and oil
Chamber A2, hydraulic fluid port B2 connection, while high-low pressure automatic switching valve I 32.1, high-low pressure automatic switching valve II 32.2, high-low pressure are from turn
The oily right position through C2, C5, C6, C7, C8, solenoid directional control valve 35 of control for changing the operating on low voltage control port X2 on valve III 32.3 is returned
Fuel tank 20.
Simultaneously under the action of resetting spring III 8, resetting spring IV 13, by check valve III 9, check valve IV 12 and mandril III
10, mandril IV 11 pushes the centre of high-low pressure conversion valve body 2 to, while high-low pressure being converted to the hydraulic fluid port B3 and hydraulic fluid port B4 envelopes of valve body 2
It closes.
The hydraulic oil that constant output pump 26 supplies at this time by the road I 36, the left position of electro-hydraulic reversing valve 31, pipeline II 37, high-low pressure
Hydraulic fluid port B1, the hydraulic fluid port B2 of automatic conversion valve body I 32.1 enter the rodless cavity of master cylinder I 33, push the piston rod 40 of master cylinder I
Advance.Meanwhile the hydraulic oil of the rod chamber of master cylinder I 33 enters through hydraulic fluid port B1, B2 on high-low pressure automatic switching valve III 32.3
To the rod chamber of master cylinder II 34, the piston rod 41 of master cylinder II is made to retreat, the hydraulic oil of II 34 rodless cavity of master cylinder is through height
Pressure is automatic to fill the hydraulic fluid port B1 changed on valve II 32.2, hydraulic fluid port B2, pipeline III 38, the left position of electro-hydraulic reversing valve 31, throttle valve 28, cooling
Device 27,24 oil return box 20 of return filter；
When I piston rod 40 of master cylinder proceeds to stroke end, automatic touching keeps 1DT power-off, 2DT logical close to switch K1
Electricity, electro-hydraulic reversing valve 31 is in right position, at this point, hydraulic oil diameter pipeline I 36,31 right position of electro-hydraulic reversing valve, pipeline that constant output pump supplies
III 38, dress changes the hydraulic fluid port B1 of valve II 32.2 to high-low pressure automatically, hydraulic fluid port B2 enters the rodless cavity of master cylinder II 34, pushes master cylinder
II piston rod 41 advances.The hydraulic oil of the rod chamber of master cylinder II 34 is through the hydraulic fluid port on high-low pressure automatic switching valve III 32.3 simultaneously
B1, hydraulic fluid port B2 enter the rod chamber of master cylinder I 33, so that I piston rod 40 of master cylinder is retreated, the hydraulic pressure of I 33 rodless cavity of master cylinder
Oil fills the hydraulic fluid port B1 for changing valve I 32.1, hydraulic fluid port B2, pipeline II 37, the right position of electro-hydraulic reversing valve 31, throttle valve through high-low pressure automatically
28, cooler 27,24 oil return box 20 of return filter, a cycle of higher pressure terminate.
When II piston rod 41 of master cylinder proceeds to stroke end, touches and be powered, 2DT power-off, make close to switch K2,1DT
31 left position of electro-hydraulic reversing valve, second cycle start, recycle successively, make concrete pumping (pump truck, Vehicle loaded pump, concrete pump)
Always it is in high-pressure work state, the height height of conveying, fed distance are remote, see Fig. 4, Fig. 8, Fig. 9.
When concrete pump (pump truck, Vehicle loaded pump, concrete pump) needs low pressure huge discharge, operating on low voltage is needed：At this time
By low pressure switching push button 47,3DT are powered, solenoid directional control valve 35 is in left position, Fig. 5, Figure 10, Figure 11 are seen.
At this point, the oily diameter pipeline IV 39 of control, 35 left position of solenoid directional control valve, control oil circuit C2, C5, C6, C7, C8 enter height
The operating on low voltage control port X2 of low pressure automatic switching valve I 32.1, II 32.2, III 32.3, the control hydraulic oil for entering X2 push away
Dynamic mandril III 10, mandril IV 11 are moved to both sides, and check valve body III 9, check valve body IV are pushed by mandril III 10, mandril IV 11
12, and compression reseting spring III 8, resetting spring IV 13 are moved to gland III 5, gland IV 7, meanwhile, high-low pressure automatic switching valve I
32.1, high-low pressure automatic switching valve II 32.2, the hydraulic fluid port B3 on high-low pressure automatic switching valve III 32.3, oil pocket A3 pass through link block
II 6 are connected to oil pocket A4, hydraulic fluid port B4.Meanwhile high-low pressure automatic switching valve I 32.1, high-low pressure automatic switching valve II 32.2, height
Press control oil diameter C9, C10, C4, C3, C1, the solenoid directional control valve of the high-pressure work control port X1 on automatic switching valve III 32.3
35 left position oil return box 20. is at this time under the action of resetting spring I 19, resetting spring II 14, by check valve body I 18, check valve
Body II 15 and mandril I 17, mandril II 16 are pushed among high-low pressure conversion valve body 2；Simultaneously by the oil of high-low pressure automatic conversion valve body 2
Mouth B1, B2 closing.Pumping button 45 is pressed at this time, and 1DT is powered, the hydraulic oil that electro-hydraulic reversing valve 31 is supplied in left position, constant output pump 26
By the road I 36,31 left position of electro-hydraulic reversing valve, pipeline II 37, high-low pressure automatic conversion valve block I 32.1 hydraulic fluid port B3, B4 enter
The rod chamber of master cylinder I 33 pushes I piston rod 40 of master cylinder to retreat, while the hydraulic oil of the rodless cavity of master cylinder I 33 is through height
Hydraulic fluid port B3, B4 of pressure auto-steering valve III 32.3 enter the rodless cavity of master cylinder II 34, before pushing II piston rod 41 of master cylinder
Into a left side of the hydraulic fluid port B4, B3 of, II 34 rod chamber hydraulic oil of master cylinder through high-low pressure automatic switching valve II 32.2, electro-hydraulic reversing valve 31
Position, throttle valve 28, cooler 27,24 oil return box 20 of return filter, when II piston rod 41 of master cylinder proceeds to stroke end,
When touching is close to switch K2,1DT is made to power off, 2DT is powered, and electro-hydraulic reversing valve 31 is in right position, the hydraulic pressure that constant output pump 26 supplies at this time
Oil is by the road I 36,31 right position of electro-hydraulic reversing valve, pipeline III 38, hydraulic fluid port B3, B4 on high-low pressure automatic switching valve II 32.2 enter
To the rod chamber of master cylinder II 34, II piston rod 41 of master cylinder is pushed to retreat, while II 34 rodless cavity hydraulic oil of master cylinder is through height
Hydraulic fluid port B3, B4 on low pressure automatic switching valve III 32.3 enter the rodless cavity of master cylinder I 33, push I piston rod 40 of master cylinder
Advance, while the hydraulic oil diameter high-low pressure of I 33 rod chamber of master cylinder fills the hydraulic fluid port B4, B3 changed on valve I 32.1, electro-hydraulic commutation automatically
The right position of valve 31, throttle valve 28, cooler 27,24 oil return box 20 of return filter, a low pressure recycle terminates, when master cylinder I
It when piston rod 40 proceeds to stroke end, touches and is powered close to switch K1,1DT, 2DT power-off makes the commutation of electro-hydraulic reversing valve 31 on a left side
Position, second cycle start, recycle successively, make concrete mixer (pump truck, Vehicle loaded pump, concrete pump) always in operating on low voltage
State；
Wherein the pressure of pipeline I 36 is adjusted by overflow valve 29 and is shown by pressure gauge 30；Throttle valve 28 is used for adjusting control
The pressure of oil.
It these are only the preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, any this field
Technical staff in the technical scope disclosed by the present invention, change can be made easily in form and details, should all cover this
Within the protection domain of invention.Therefore, protection scope of the present invention should be subject to the protection domain that claim is defined.
Claims (6)
1. a kind of hydraulic control valve, it is characterised in that：The hydraulic control valve includes two separate check valve V1 and V2,
In the inner cavity of the check valve by being divided into valve body cavity, seal chamber and mandril chamber inside outside, the valve body cavity and the mandril chamber it
Between be provided with seal chamber；
Resetting spring and check valve body, the setting of check valve body nearly mandril chamber side are provided in the valve body cavity；
Piston mandril intracavitary setting mandril and be integrally coaxially disposed, the remote valve body cavity side setting of the piston；Also wrap
An excessively oily channel is included, the excessively oily channel is connected to two mandril chambers；
The check valve body is sequentially divided into guide section, excessively oily section and seal section in an axial direction, and the guide section is close to the reset bullet
Spring one end；
The check valve body pushes the mandril chamber under the action of the resetting spring, and the seal section is matched with seal chamber sealing
It closes；
The position for corresponding to the excessively oily section in the valve body cavity wall offered oily hydraulic fluid port；
The mandril length is more than the valve body slides stroke length；
The mandril chamber end of check valve V1 and the mandril chamber end set of check valve V2 have oil-control hydraulic fluid port；
When no hydraulic oil enters the control port, due to the effect of resetting spring, the check valve body is maintained at the valve
Close to mandril chamber one end in body cavity, closed between the mandril chamber and the valve body cavity；
When high pressure liquid pressure oil is into mandril chamber described in the control port, hydraulic oil pushes the piston of the mandril to make the top
Bar is moved to valve body cavity direction, pushes the check valve body to be moved to resetting spring direction so as to cause the mandril, is made described
Valve body cavity is connected to the mandril chamber, so that the excessively oily hydraulic fluid port of check valve V1, V1 valve body cavities, V1 mandrils chamber, excessively oily channel, the tops V2
Rod cavity, V2 valve body cavities, the oily of V2 cross oil phase connection.
2. a kind of hydraulic control valve as described in claim 1, it is characterised in that：The coaxial phases of the check valve V1 and check valve V2
To setting, each mandril position is close.
3. a kind of hydraulic control valve as described in claim 1, it is characterised in that：Connection is set on the outside of hydraulic control valve body
The check valve V1 is connected to by block with the mandril chamber of check valve V2.
4. a kind of concrete pumping equipment high-low pressure automatic switching valve, it is characterised in that：It is wanted including at least two or more such as right
It asks 1 to the hydraulic control valve described in claim 3 any one claim.
5. a kind of concrete pumping equipment high-low pressure automatic switching valve as claimed in claim 4, it is characterised in that：Described in two
The one-way valve axis of hydraulic control valve be arranged in parallel.
6. a kind of a kind of concrete pumping equipment high-low pressure automatic switching valve using as described in claim 4 or claim 5
Hydraulic system, it is characterised in that：The system includes that oil cylinder G1, oil cylinder G2 and high-low pressure automatic switching valve Z1, high-low pressure are automatic
Switching valve Z2, high-low pressure automatic switching valve Z3 and two way selected valve D1 and two way selected valve D2；The oil cylinder G1, the oil cylinder
G2 is both provided with piston rod；
The high-low pressure automatic switching valve Z2's is provided with high voltage control hydraulic fluid port K21 and low voltage control hydraulic fluid port K22, high voltage control oil
Mouth K21 controls B21, B22 hydraulic fluid port, and low voltage control hydraulic fluid port K22 controls B23, B24；The setting of the high-low pressure automatic switching valve Z1
There are high voltage control hydraulic fluid port K11 and low voltage control hydraulic fluid port K12, high voltage control hydraulic fluid port K11 to control B11, B12 hydraulic fluid port, low voltage control oil
Mouth K12 controls B13, B14；The high-low pressure automatic switching valve Z3's is provided with high voltage control hydraulic fluid port K31 and low voltage control hydraulic fluid port
K32, high voltage control hydraulic fluid port K31 control B31, B32 hydraulic fluid port, and low voltage control hydraulic fluid port K32 controls B33, B34；
B21, B14 are connected to by oil pipe with the rod chamber of oil cylinder G1 respectively；
B23, B12 are connected to by oil pipe with the rodless cavity of oil cylinder G1 respectively；
B22, B34 are connected to by oil pipe with the rod chamber of oil cylinder G2 respectively；
B24, B32 are connected to by oil pipe with the rodless cavity of oil cylinder G2 respectively；
B11, B13 are connected in parallel in the work oil outlet d1 of two way selected valve D1；
B31, B33 are connected in parallel in the work oil outlet d2 of two way selected valve D1；
The oil inlet of two way selected valve D1 is connect by oil inlet pipe with oil pump, and the oil return opening of two way selected valve D1 passes through oil return pipe
Road is connect with fuel tank；
K11, K21, K31 are connected in parallel in the work oil inlet f1 of two way selected valve D2；
K12, K22, K32 are connected in parallel in the work oil inlet f2 of two way selected valve D2；
The oil inlet of two way selected valve D2 is connect by oil inlet pipe with oil pump, and the oil return opening of two way selected valve D2 passes through oil return pipe
Road is connect with fuel tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810780986.7A CN108716494B (en) | 2018-07-17 | 2018-07-17 | High-low pressure automatic switching valve of concrete pumping equipment and hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810780986.7A CN108716494B (en) | 2018-07-17 | 2018-07-17 | High-low pressure automatic switching valve of concrete pumping equipment and hydraulic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108716494A true CN108716494A (en) | 2018-10-30 |
| CN108716494B CN108716494B (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810780986.7A Active CN108716494B (en) | 2018-07-17 | 2018-07-17 | High-low pressure automatic switching valve of concrete pumping equipment and hydraulic system |
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| Country | Link |
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| CN (1) | CN108716494B (en) |
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| CN200982329Y (en) * | 2006-11-16 | 2007-11-28 | 湖北楚天工程机械有限公司 | Two position two-way plug-in valve type high and low pressure switching valve |
| CN201568278U (en) * | 2009-08-06 | 2010-09-01 | 王力辉 | High and low pressure switching valve for concrete pump |
| CN201884255U (en) * | 2010-12-16 | 2011-06-29 | 飞翼股份有限公司 | High-displacement high-and-low-pressure automatic switching operator for concrete pumps |
| CN202031822U (en) * | 2011-03-15 | 2011-11-09 | 山推楚天工程机械有限公司 | Integral-type concrete pump high-low-pressure switching device |
| JP2013194565A (en) * | 2012-03-16 | 2013-09-30 | Kyokuto Kaihatsu Kogyo Co Ltd | Concrete pump |
| CN107218261A (en) * | 2017-06-30 | 2017-09-29 | 湖南十开科技有限公司 | Hydraulic lock and load feedback hydraulic system |
| CN209324770U (en) * | 2018-07-17 | 2019-08-30 | 湖南鼎峰机械有限公司 | A kind of hydraulic control valve, concrete pumping equipment high-low pressure automatic switching valve and hydraulic system |
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2018
- 2018-07-17 CN CN201810780986.7A patent/CN108716494B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200982329Y (en) * | 2006-11-16 | 2007-11-28 | 湖北楚天工程机械有限公司 | Two position two-way plug-in valve type high and low pressure switching valve |
| CN201568278U (en) * | 2009-08-06 | 2010-09-01 | 王力辉 | High and low pressure switching valve for concrete pump |
| CN201884255U (en) * | 2010-12-16 | 2011-06-29 | 飞翼股份有限公司 | High-displacement high-and-low-pressure automatic switching operator for concrete pumps |
| CN202031822U (en) * | 2011-03-15 | 2011-11-09 | 山推楚天工程机械有限公司 | Integral-type concrete pump high-low-pressure switching device |
| JP2013194565A (en) * | 2012-03-16 | 2013-09-30 | Kyokuto Kaihatsu Kogyo Co Ltd | Concrete pump |
| CN107218261A (en) * | 2017-06-30 | 2017-09-29 | 湖南十开科技有限公司 | Hydraulic lock and load feedback hydraulic system |
| CN209324770U (en) * | 2018-07-17 | 2019-08-30 | 湖南鼎峰机械有限公司 | A kind of hydraulic control valve, concrete pumping equipment high-low pressure automatic switching valve and hydraulic system |
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| Publication number | Publication date |
|---|---|
| CN108716494B (en) | 2023-12-01 |
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