CN102478031B - Switching valve and pumping system - Google Patents
Switching valve and pumping system Download PDFInfo
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- CN102478031B CN102478031B CN201010557379.8A CN201010557379A CN102478031B CN 102478031 B CN102478031 B CN 102478031B CN 201010557379 A CN201010557379 A CN 201010557379A CN 102478031 B CN102478031 B CN 102478031B
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Abstract
The invention discloses a kind of switching valve and pumping system.This switching valve comprises: valve body, valve body is provided with the first oil inlet and outlet and the second oil inlet and outlet, and the first hydraulic fluid port to be communicated with respectively with left oil cylinder and the rod chamber of right oil cylinder and the second hydraulic fluid port, the 3rd hydraulic fluid port be communicated with respectively with left oil cylinder and the rodless cavity of right oil cylinder and the 4th hydraulic fluid port; The first cartridge valve is connected between first oil inlet and outlet and the 3rd hydraulic fluid port, between the first hydraulic fluid port and the second hydraulic fluid port and between the 4th hydraulic fluid port and the second oil inlet and outlet; The second cartridge valve is connected between first oil inlet and outlet and the second hydraulic fluid port, between the 4th hydraulic fluid port and the 3rd hydraulic fluid port and between the first hydraulic fluid port and the second oil inlet and outlet; First cartridge valve and the second cartridge valve are connected with solenoid directional control valve, and two oil outlets of solenoid directional control valve are connected with the control mouth of the first cartridge valve and the second cartridge valve respectively.Switch valve structure provided by the invention is simple, can effectively carry out the switching of high low pressure oil circuit, high low pressure oil circuit is switched very convenient.
Description
Technical field
The present invention relates to valve gate technology, particularly relate to a kind of switching valve and pumping system.
Background technique
High-low voltage switching device is needed in the pumping system of engineering machinery, to carry out the switching of high low pressure oil circuit, meet different pumping pressure needs, realize high pressure pumping and low pressure pumping, such as, at concrete mixer, drag in the pumping system of pump and Vehicle loaded pump, the switching valve as switching for high low pressure oil circuit is all installed, realize high low pressure pumping needs.
Figure 1A is the plan view of switching valve in existing concrete pumping system; Figure 1B is the left view of switching valve in existing concrete pumping system.In existing concrete pumping system, the switching that switching valve carries out high low pressure pumping state mainly adopts the direction exchanging manifold block to realize, and namely changing the circulating direction of oil circuit in switching valve by exchanging manifold block, realizing the switching of high low pressure oil circuit.As shown in FIG. 1A and 1B, switching valve in existing concrete pumping system comprises: upper manifold block 10 and lower manifold block 20, fixed by bolt 30 between upper manifold block 10 and lower manifold block 20, before and after the switching valve of upper manifold block 10 and the involutory rear formation of lower manifold block 20, both sides have A1 mouth respectively, A2 mouth and B1 mouth, B2 mouth, wherein, A1 mouth, A2 mouth is communicated with the rod chamber of oil cylinder, B1 mouth, B2 mouth is communicated with the rodless cavity of oil cylinder, and the oil inlet and outlet P1 mouth of oil circuit and P2 mouth are communicated with the oil hydraulic pump of the oil inlet and outlet on this switching valve and pumping system or hydrovalve respectively, during original state, the A1 mouth of switching valve, be communicated with the oil inlet and outlet P1 mouth of oil circuit, A2 mouth is communicated with oil inlet and outlet P2, B1 mouth, B2 mouth is communicated with, now the high pressure oil of P1 mouth enters the rod chamber of oil cylinder by A1 mouth, concrete pumping system can be worked under low pressure pumping state, and when concrete pumping system needs to carry out high pressure pumping, 6 bolts 30 that can come loose on switching valve, and together with retightening again with lower manifold block 20 after upper manifold block 10 is revolved turnback, oil inlet and outlet P1 mouth can be communicated with B1 mouth, oil inlet and outlet P2 mouth is communicated with B2 mouth, and A1 mouth, A2 mouth are communicated with.The high pressure oil of the working connection of the pumping system now entered from P1 mouth enters the rodless cavity of oil cylinder by B1 mouth, concrete pumping system can be worked under high pressure pumping state.
In summary it can be seen, when the switching valve in existing concrete pumping system carries out the switching of high low pressure oil circuit, need dismantle and re-assembly switching valve, therefore, need pumping system to shut down when high low pressure oil circuit switches, make high low pressure oil circuit switch time-consuming, effort, handoff procedure is complicated; And in high low pressure oil circuit handoff procedure, owing to will dismantle switching valve, make hydraulic oil easily outflow, introduced contaminants also easily enters pumping system and causes oil circuit to pollute, and causes the system failure.
Summary of the invention
The invention provides a kind of switching valve and pumping system, effectively can solve existing switching valve Problems existing in high low pressure oil circuit handoff procedure, improve the convenience that switching valve carries out high low pressure oil circuit handoff procedure, avoid pumping system oil circuit to pollute.
The invention provides a kind of switching valve, comprising:
Valve body, described valve body is provided with the first oil inlet and outlet and the second oil inlet and outlet, and the first hydraulic fluid port to be communicated with respectively with left oil cylinder and the rod chamber of right oil cylinder and the second hydraulic fluid port, the 3rd hydraulic fluid port be communicated with respectively with described left oil cylinder and the rodless cavity of right oil cylinder and the 4th hydraulic fluid port;
The first cartridge valve is connected between described first oil inlet and outlet and the 3rd hydraulic fluid port, between described first hydraulic fluid port and the second hydraulic fluid port and between described 4th hydraulic fluid port and the second oil inlet and outlet;
The second cartridge valve is connected between described first oil inlet and outlet and the second hydraulic fluid port, between described 4th hydraulic fluid port and the 3rd hydraulic fluid port and between described first hydraulic fluid port and the second oil inlet and outlet;
Described first cartridge valve and the second cartridge valve are connected with solenoid directional control valve, and two oil outlets of described solenoid directional control valve are connected with the control mouth of described first cartridge valve and the second cartridge valve respectively.
The invention provides a kind of pumping system, comprise the switching valve that left oil cylinder, right oil cylinder and the invention described above provide.
Switching valve provided by the invention and pumping system, by arranging the cartridge valve be connected with each hydraulic fluid port of valve body, and the solenoid directional control valve to be connected with cartridge valve, make switching valve when carrying out high low pressure oil circuit and switching, only need to be undertaken controlling by solenoid directional control valve, and do not need to dismantle switching valve, the switching of high low pressure oil circuit can be carried out under pumping system not outage state, make the switching valve of high low pressure oil circuit very convenient, effectively can improve the working efficiency of pumping system; Meanwhile, in high low pressure oil circuit handoff procedure, also to there will not be in prior art because of the oil circuit pollution problem that causes of dismounting switching valve, can effectively ensure that pumping system normally works, reduce fault odds.Switch valve structure provided by the invention is simple, and it is convenient to realize, and effectively can carry out the switching of high low pressure oil circuit.
Accompanying drawing explanation
Figure 1A is the plan view of switching valve in existing concrete pumping system;
Figure 1B is the left view of switching valve in existing concrete pumping system;
Fig. 2 is the structural representation of cartridge valve in switching valve embodiment of the present invention;
Fig. 3 A is the plan view of switching valve embodiment of the present invention;
Fig. 3 B is the rear view of switching valve embodiment of the present invention;
Fig. 3 C is the plan view of switching valve embodiment of the present invention;
Fig. 3 D is the right elevation of switching valve embodiment of the present invention;
Fig. 3 E is the left view of switching valve embodiment of the present invention;
Fig. 4 is the internal structure schematic diagram of valve body in the embodiment of the present invention;
Fig. 5 is the internal structure schematic diagram of center valve body in the embodiment of the present invention;
Fig. 6 is the linkage structure schematic diagram of switching valve embodiment of the present invention and oil cylinder;
Fig. 7 A is the catenation principle schematic diagram of switching valve embodiment of the present invention when carrying out low pressure pumping between each valve and hydraulic fluid port;
Fig. 7 B is the catenation principle schematic diagram of switching valve embodiment of the present invention when carrying out high pressure pumping between each valve and hydraulic fluid port.
Reference character:
The upper manifold block of 10-; Manifold block under 20-; 30-bolt;
201-spool; 202-valve pocket; 203-spring;
204-baffle plate; 205-control chamber; Chamber at the bottom of 206-;
207-annular chamber; 1-valve body; 21-first cartridge valve;
22-second cartridge valve; 3-solenoid directional control valve; 11-first oil inlet and outlet;
12-second oil inlet and outlet; 13-first hydraulic fluid port; 14-second hydraulic fluid port;
15-the 3rd hydraulic fluid port; 16-the 4th hydraulic fluid port; 171-lumen pore;
172-lumen pore; 173-lumen pore; 174-lumen pore;
175-lumen pore; 176-lumen pore; 4-center valve body;
5-shuttle valve; 41-cavity; 18-cover plate;
300-switching valve; The left oil cylinder of 100-; The right oil cylinder of 200-.
Embodiment
For making the object of the embodiment of the present invention, technological scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technological scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In view of existing switching valve is when carrying out high-pressure oil passage and switching, need dismounting switching valve just can carry out high low pressure oil circuit and switch Problems existing, inventor provide a kind of switching valve, by the cartridge valve that arranges on valve body and solenoid directional control valve, utilize solenoid directional control valve to control being turned on or off of cartridge valve, and then realize the switching of high low pressure oil circuit, make the switching of high low pressure oil circuit very convenient, existing dismounting switching valve effectively can be avoided just to carry out high low pressure oil circuit and switch Problems existing.
First be described to the cartridge valve in the embodiment of the present invention and solenoid directional control valve below, to have a better understanding to technical solution of the present invention.
Fig. 2 is the structural representation of cartridge valve in switching valve embodiment of the present invention.The cartridge valve related in the present embodiment switching valve and solenoid directional control valve all can be cartridge valve and the solenoid directional control valve of standard, wherein, solenoid directional control valve is the selector valve of a two-position four-way, and it can utilize electromagnet thrust to promote valve core movement to convert fluid flow direction; Cartridge valve has control mouth and two main hydraulic fluid ports, and the control mouth of cartridge valve can be connected with two of a solenoid directional control valve oil outlet, and then passing through the flow direction of the oil outlet changing solenoid directional control valve, main hydraulic fluid port A and the main hydraulic fluid port B that can control cartridge valve are turned on or off.As shown in Figure 2, cartridge valve comprises: spool 201, valve pocket 202, spring 203 and baffle plate 204, and the control chamber 205 this cartridge valve had as controlling mouth x, and as the chamber, the end 206 of main hydraulic fluid port A and the annular chamber 207 as main hydraulic fluid port B, when controlling to inject high pressure oil in mouth x, spool can tightly be kept out in the bore of valve pocket 202 under high pressure oil effect, make winner hydraulic fluid port A and main hydraulic fluid port B cannot conducting, otherwise, when controlling mouth x and communicating with oil return, the spring force that main hydraulic fluid port A internal pressure oil only need overcome spring 203 can force spool 201 upwards jack-up, thus with main hydraulic fluid port B conducting, therefore, by the control mouth x of cartridge valve is connected with solenoid directional control valve, can under the control of the control oil of solenoid directional control valve, control being turned on or off between main hydraulic fluid port A and main hydraulic fluid port B.In the present embodiment, be exactly coordinating by solenoid directional control valve and cartridge valve, change the circulating direction in switching valve of the pressure oil entered from oil inlet and outlet, and then realize the switching of high low pressure oil circuit.
Fig. 3 A is the plan view of switching valve embodiment of the present invention; Fig. 3 B is the rear view of switching valve embodiment of the present invention; Fig. 3 C is the plan view of switching valve embodiment of the present invention; Fig. 3 D is the right elevation of switching valve embodiment of the present invention; Fig. 3 E is the left view of switching valve embodiment of the present invention.As shown in Fig. 3 A ~ Fig. 3 E, the present embodiment switching valve comprises: valve body 1, first cartridge valve 21, second cartridge valve 22 and solenoid directional control valve 3, namely this first cartridge valve 21 and the second cartridge valve 22 are the cartridge valves shown in above-mentioned Fig. 2, solenoid directional control valve 3 is the solenoid directional control valve of above-mentioned said two-position four-way, wherein, valve body 1 is provided with the first oil inlet and outlet 11, second oil inlet and outlet 12, first hydraulic fluid port 13, second hydraulic fluid port 14, 3rd hydraulic fluid port 15 and the 4th hydraulic fluid port 16, first hydraulic fluid port 13 is communicated with the rod chamber of right oil cylinder with the left oil cylinder of pumping system respectively with the second hydraulic fluid port 14, 3rd hydraulic fluid port 15 is communicated with the rodless cavity of left oil cylinder with right oil cylinder respectively with the 4th hydraulic fluid port 16, and be connected to the first cartridge valve 21 between the first oil inlet and outlet 11 and the 3rd hydraulic fluid port 15, between the first hydraulic fluid port 13 and the second hydraulic fluid port 14 and between the 4th hydraulic fluid port 16 and the second oil inlet and outlet 12, the second cartridge valve 22 is connected between first oil inlet and outlet 11 and the second hydraulic fluid port 14, between the 4th hydraulic fluid port 16 and the 3rd hydraulic fluid port 15 and between the first hydraulic fluid port 13 and the second oil inlet and outlet 12, first cartridge valve 21 is communicated with oil outlet Bd with the oil outlet Ad of solenoid directional control valve 3 respectively with the control mouth x of the second cartridge valve 22, making solenoid directional control valve 3 by controlling the circulating direction of control oil of oil outlet Ad and oil outlet Bd, controlling being turned on or off of the first cartridge valve 21 and the second cartridge valve 22.
In the present embodiment, each first cartridge valve 21 be connected between each hydraulic fluid port can form the first cartridge valve group; The second cartridge valve 22 be connected between each hydraulic fluid port can form the second cartridge valve group.Because the control mouth x of the first cartridge valve in the first cartridge valve group is communicated with oil outlet Bd with the oil outlet Ad of solenoid directional control valve 3 respectively with the control mouth x of the second cartridge valve in the second cartridge valve group, therefore, oil is controlled when being connected with in solenoid directional control valve 3, and the control mouth x of the first cartridge valve 21 be connected with there is elevated pressures control oil time, the control mouth x of the second cartridge valve 22 will communicate with oil return, therefore, at synchronization, the first cartridge valve 21 and the second cartridge valve 22 only have one of them to be on state.
Particularly, when being connected with the control oil of high pressure in the first cartridge valve 21 in the first cartridge valve group, will disconnect between the main hydraulic fluid port A of the first cartridge valve 21 in the first cartridge valve group and main hydraulic fluid port B, and will conducting between the main hydraulic fluid port A of the second cartridge valve 21 in the second cartridge valve group and main hydraulic fluid port B, therefore, between first oil inlet and outlet 11 and the second hydraulic fluid port 14, between 4th hydraulic fluid port 16 and the 3rd hydraulic fluid port 15, and first will be on state by the second cartridge valve 22 between hydraulic fluid port 13 and the second oil inlet and outlet 12, and between the first oil inlet and outlet 11 and the 3rd hydraulic fluid port 15, between first hydraulic fluid port 13 and the second hydraulic fluid port 14, and the 4th is in off state between hydraulic fluid port 16 and the second oil inlet and outlet 12, otherwise, solenoid directional control valve 3 commutation makes the control mouth x of the first cartridge valve 21 be connected with low voltage control oil, when the control mouth x of the second cartridge valve 22 is connected with high voltage control oil, on state will be in by the first cartridge valve 21 between first oil inlet and outlet 11 and the 3rd hydraulic fluid port 15, between the first hydraulic fluid port 13 and the second hydraulic fluid port 14 and between the 4th hydraulic fluid port 16 and the second oil inlet and outlet 12, between the first oil inlet and outlet 11 and the second hydraulic fluid port 14, between the 4th hydraulic fluid port 16 and the 3rd hydraulic fluid port 15 and between the first hydraulic fluid port 13 and the second oil inlet and outlet 12, will off state be in.Can find out, by controlling the circulating direction of the control oil of solenoid directional control valve, can control the conductive channel of oil circuit in switching valve, thus can realize the switching of oil circuit, its specific implementation process will be described in detail later.
Fig. 4 is the internal structure schematic diagram of valve body in the embodiment of the present invention.In the present embodiment, first cartridge valve and the second cartridge valve all can be plugged in valve body 1, particularly, as shown in Fig. 3 C and Fig. 5, lumen pore can be provided with in valve body 1, first cartridge valve 21 and the second cartridge valve 22 can be plugged in lumen pore, and be fixed in lumen pore by the cover plate 18 being fixed on valve body 1 surface, in the present embodiment, be provided with in valve body 16 with 6 lumen pores of cartridge valve shape and size adaptation, be respectively lumen pore 171, lumen pore 172, lumen pore 173, lumen pore 174, lumen pore 175 and lumen pore 176, and be provided with fluid passage in each lumen pore, make to be plugged in the cartridge valve in lumen pore to be connected with between each hydraulic fluid port by the fluid passage of lumen pore, thus set up the connecting passage between each hydraulic fluid port in valve body 1 inside.Can find out, by being plugged in valve body by cartridge valve, and utilize the fluid passage arranged in valve body to be communicated with each hydraulic fluid port, making the compact structure of whole switching valve, there is good sealing effect, can effectively avoid oil circuit bad connection and occur leakage of oil.
In the present embodiment, solenoid directional control valve 3 is installed on valve body 1, and the oil outlet Ad of solenoid directional control valve 3 is connected respectively by the control mouth x of the fluid passage be arranged on valve body 1 with the first cartridge valve 21 and the second cartridge valve 22 with oil outlet Bd.
In the present embodiment, as shown in Figure 3 A and Figure 3 B, valve body 1 also can be provided with center valve body 4, and be provided with shuttle valve 5 in this center valve body 4, the control oil of solenoid directional control valve 3 flows into the oil inlet P d of this solenoid directional control valve 3 by shuttle valve 5.
Fig. 5 is the internal structure schematic diagram of center valve body in the embodiment of the present invention.As shown in Fig. 5 and Fig. 3 A, this center valve body 4 is provided with cavity 41, shuttle valve 5 can be plugged in this cavity 41, and cavity 41 be provided with the fluid passage be communicated with solenoid directional control valve; Simultaneously, center valve body 4 is also provided with and controls oily oil inlet and outlet PX1 and PX2, extraneous control oil is made to enter shuttle valve by this oil inlet and outlet PX1 and PX2 and finally enter the oil inlet P d of solenoid directional control valve, effectively can ensure the pressure entering solenoid directional control valve internal control liquefaction, improve control effects.
In the present embodiment, above-mentioned cartridge valve, solenoid directional control valve, shuttle valve are the valve of standard, by arranging the cavity coordinated with standard valve on valve body and center valve body, and the fluid passage arranged, can effectively realize between above-mentioned each hydraulic fluid port and valve, and the connection of each hydraulic fluid port between valve and valve.
For having a better understanding to technical solution of the present invention, below the embody rule with the embodiment of the present invention is described in detail.
Fig. 6 is the linkage structure schematic diagram of switching valve embodiment of the present invention and oil cylinder; Fig. 7 A is the catenation principle schematic diagram of switching valve embodiment of the present invention when carrying out low pressure pumping between each valve and hydraulic fluid port; Fig. 7 B is the catenation principle schematic diagram of switching valve embodiment of the present invention when carrying out high pressure pumping between each valve and hydraulic fluid port.As shown in Figure 6, first hydraulic fluid port E2 of the present embodiment switching valve 300 is communicated with the rod chamber E2 of left oil cylinder 100, second hydraulic fluid port F2 is communicated with the rod chamber F2 of right oil cylinder 200, and the 3rd hydraulic fluid port F1 is communicated with the rodless cavity F1 of left oil cylinder 100, and the 4th hydraulic fluid port E1 is communicated with the rodless cavity E1 of right oil cylinder 200; First oil inlet and outlet C is connected with oil hydraulic pump or hydrovalve respectively with the second oil inlet and outlet D, by the solenoid directional control valve 3 on switching valve 300, can control to enter the oil circuit direction after switching valve 300 from the first oil inlet and outlet C or the second oil inlet and outlet D, thus pumping system can be made to be operated in high pressure pumping state or low pressure pumping state.
In the present embodiment, as shown in figures 7 a and 7b, cartridge valve A1 in figure, cartridge valve A4, cartridge valve A5 are the first cartridge valve, cartridge valve B2, cartridge valve B3, cartridge valve B6 are the second cartridge valve, valve C4 is shuttle valve, valve D3 is solenoid directional control valve, and the oil outlet Ad of solenoid directional control valve is connected with the first cartridge valve and the second cartridge valve respectively with oil outlet Bd, thus can control being turned on or off of the first cartridge valve and the second cartridge valve by solenoid directional control valve.Particularly, as shown in Figure 7 A, when pumping system needs to carry out low pressure pumping, solenoid directional control valve can no electric circuit, now PX1, the control oil that PX2 mouth enters can through shuttle valve by side hydraulic oil high for pressure, namely high pressure side controls oil and acts on cartridge valve A1, on the control chamber of cartridge valve A4 and cartridge valve A5, therefore, first cartridge valve is all in off state, and as cartridge valve B2, cartridge valve B3, cartridge valve B6 is then on state, now the high pressure oil of working connection enters the annular chamber of cartridge valve B3 from the first oil inlet and outlet C, overcome the spring force on the spool top of cartridge valve B3, spool is backed down, the main hydraulic fluid port A of cartridge valve B3 and pouring orifice B conducting, high pressure oil flows to the second hydraulic fluid port F2 by cartridge valve B3, and the rod chamber F2 of right oil cylinder is entered into by flexible pipe, under the effect of rod chamber F2 inner high voltage oil, pressure oil in rodless cavity E1 enters into the chamber, the end of cartridge valve B6 through the 4th hydraulic fluid port E1, after the spring force overcoming cartridge valve B6, flow out from the annular chamber of cartridge valve B6, and enter the rodless cavity F1 of left oil cylinder by the 3rd hydraulic fluid port F1, under the effect of rodless cavity F1 inner high voltage oil, pressure oil in rod chamber E2 enters the chamber, the end of cartridge valve B2 by the first hydraulic fluid port E2, and after overcoming the spring force of cartridge valve B2, flow out from annular chamber, final arrival second oil inlet and outlet D, again be back to the fuel tank of pumping system by the hydraulic oil of the second oil inlet and outlet D, thus realize low pressure pumping, the circulating direction of oil circuit specifically can see the direction of arrow shown in Fig. 7 A.
Similar, as shown in Figure 7 B, when pumping system needs to carry out high pressure pumping, solenoid directional control valve is energized, now PX1, side hydraulic oil high for pressure can be acted on cartridge valve B2 through shuttle valve by the control oil of PX2 mouth, cartridge valve B3, on the control chamber of cartridge valve B6, therefore, second cartridge valve is all in off state, and cartridge valve A1, cartridge valve A4, cartridge valve A5 is then on state, after now the high pressure oil of working connection enters valve body from the first oil inlet and outlet C, the rodless cavity F1 of left oil cylinder is entered by cartridge valve A4 and the 3rd hydraulic fluid port F1, under the high pressure oil effect of hydraulic oil in rod chamber E2 in rodless cavity F1, from the first hydraulic fluid port E2, cartridge valve A5 and the second hydraulic fluid port F2 enters the rod chamber F2 of right oil cylinder, hydraulic oil in rodless cavity E1 is under the effect of rod chamber F2 inner high voltage oil, from the 4th hydraulic fluid port E1, cartridge valve A1 is back to fuel tank from the second oil inlet and outlet D, thus realize high pressure pumping, the circulating direction of oil circuit specifically can see the direction of arrow shown in Fig. 7 B.
It will be understood by those skilled in the art that, between each cartridge valve, and when being connected between cartridge valve and each hydraulic fluid port on valve body, pouring orifice A on cartridge valve and pouring orifice B can according to suitable Placement, or corresponding relation is connected with other hydraulic fluid port, thus ensure, under solenoid directional control valve 3 controls, by the conducting of hydraulic fluid port A main on the first cartridge valve 21 and main hydraulic fluid port B, between the first oil inlet and outlet 11 and the second oil inlet and outlet 12, to form high pressure pumping oil circuit; Or, by the conducting of hydraulic fluid port A main on the second cartridge valve 22 and main hydraulic fluid port B, between the first oil inlet and outlet 11 and the second oil inlet and outlet 12, form low pressure pumping oil circuit, thus meet the high low pressure pumping needs of switching valve.
To sum up, in the present embodiment switching valve, by arranging the cartridge valve be connected with each hydraulic fluid port of valve body, and the solenoid directional control valve to be connected with cartridge valve, make switching valve when carrying out high low pressure oil circuit and switching, only need to be undertaken controlling by solenoid directional control valve, and do not need to dismantle switching valve, the switching of high low pressure oil circuit can be carried out under pumping system not outage state, make the switching valve of high low pressure oil circuit very convenient, effectively can improve the working efficiency of pumping system; Meanwhile, in high low pressure oil circuit handoff procedure, also to there will not be in prior art because of the oil circuit pollution problem that causes of dismounting switching valve, can effectively ensure that pumping system normally works, reduce fault odds.The present embodiment switch valve structure is simple, and it is convenient to realize, and effectively can carry out the switching of high low pressure oil circuit.
The embodiment of the present invention also provides a kind of pumping system, comprises the switching valve that left oil cylinder, right oil cylinder and the invention described above embodiment provide, and wherein, the first hydraulic fluid port of this switching valve is communicated with the rod chamber of left oil cylinder with right oil cylinder respectively by flexible pipe with the second hydraulic fluid port; 3rd hydraulic fluid port of switching valve is communicated with the rodless cavity of left oil cylinder with right oil cylinder respectively by flexible pipe with the 4th hydraulic fluid port.Switching valve in the present embodiment pumping system can carry out the switching of high low pressure oil circuit in pumping system working procedure; make the switching of high low pressure oil circuit very convenient; do not need pumping system to shut down in high low pressure oil circuit handoff procedure, effectively can improve the working efficiency of pumping system.
Last it is noted that above embodiment is only in order to illustrate technological scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technological scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technological scheme.
Claims (8)
1. a switching valve, is characterized in that, comprising:
Valve body, described valve body is provided with the first oil inlet and outlet and the second oil inlet and outlet, and the first hydraulic fluid port to be communicated with respectively with left oil cylinder and the rod chamber of right oil cylinder and the second hydraulic fluid port, the 3rd hydraulic fluid port be communicated with respectively with described left oil cylinder and the rodless cavity of right oil cylinder and the 4th hydraulic fluid port;
The first cartridge valve is connected between described first oil inlet and outlet and the 3rd hydraulic fluid port, between described first hydraulic fluid port and the second hydraulic fluid port and between described 4th hydraulic fluid port and the second oil inlet and outlet; Wherein, the annular chamber of described first cartridge valve that described first oil inlet and outlet is connected with between described first oil inlet and outlet and described 3rd hydraulic fluid port connects;
The second cartridge valve is connected between described first oil inlet and outlet and the second hydraulic fluid port, between described 4th hydraulic fluid port and the 3rd hydraulic fluid port and between described first hydraulic fluid port and the second oil inlet and outlet; Wherein, the annular chamber of described second cartridge valve that described first oil inlet and outlet is connected with between described first oil inlet and outlet and the second hydraulic fluid port connects;
Described first cartridge valve and the second cartridge valve are connected with solenoid directional control valve, and two oil outlets of described solenoid directional control valve are connected with the control mouth of described first cartridge valve and the second cartridge valve respectively;
Described valve body is installed with center valve body, in described center valve body, is inserted with shuttle valve;
The filler opening of described solenoid directional control valve is connected with described shuttle valve, and the control oil of described solenoid directional control valve flows into described solenoid directional control valve by described shuttle valve.
2. switching valve according to claim 1, is characterized in that, described first cartridge valve and the second cartridge valve are all plugged in described valve body.
3. switching valve according to claim 2, it is characterized in that, be provided with the lumen pore plugging described first cartridge valve and the second cartridge valve in described valve body, described first cartridge valve and the second cartridge valve are plugged in described lumen pore by the cover plate being installed in valve body surface.
4. switching valve according to claim 1, it is characterized in that, described first cartridge valve is connected with described first oil inlet and outlet, the first hydraulic fluid port, the second hydraulic fluid port, the 3rd hydraulic fluid port, the 4th hydraulic fluid port or the second oil inlet and outlet by the fluid passage be arranged in described valve body;
Described second cartridge valve is connected with described first oil inlet and outlet, the first hydraulic fluid port, the second hydraulic fluid port, the 3rd hydraulic fluid port, the 4th hydraulic fluid port or the second oil inlet and outlet by the fluid passage be arranged in described valve body.
5., according to the arbitrary described switching valve of Claims 1 to 4, it is characterized in that, described solenoid directional control valve is installed on described valve body.
6. switching valve according to claim 5, is characterized in that, two oil outlets of described solenoid directional control valve are connected respectively by the control mouth of the fluid passage be arranged on valve body with described first cartridge valve and the second cartridge valve.
7. a pumping system, is characterized in that, comprises the arbitrary described switching valve of left oil cylinder, right oil cylinder and claim 1 ~ 6.
8. pumping system according to claim 7, is characterized in that, the first hydraulic fluid port of described switching valve is communicated with the rod chamber of right oil cylinder with described left oil cylinder respectively by flexible pipe with the second hydraulic fluid port;
3rd hydraulic fluid port of described switching valve is communicated with the rodless cavity of right oil cylinder with described left oil cylinder respectively by flexible pipe with the 4th hydraulic fluid port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010557379.8A CN102478031B (en) | 2010-11-22 | 2010-11-22 | Switching valve and pumping system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010557379.8A CN102478031B (en) | 2010-11-22 | 2010-11-22 | Switching valve and pumping system |
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| Publication Number | Publication Date |
|---|---|
| CN102478031A CN102478031A (en) | 2012-05-30 |
| CN102478031B true CN102478031B (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010557379.8A Active CN102478031B (en) | 2010-11-22 | 2010-11-22 | Switching valve and pumping system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705226B (en) * | 2012-07-05 | 2015-08-19 | 中联重科股份有限公司 | Pumping device and pumping equipment comprising same |
| CN102748338B (en) * | 2012-07-25 | 2014-12-24 | 中联重科股份有限公司 | Rotary valve and double-cylinder pumping equipment |
| CN112576564B (en) * | 2020-11-26 | 2023-01-24 | 天津市天锻压力机有限公司 | Pressure balance protection device of double-side horizontal side extrusion cylinder of large servo press |
Citations (4)
| 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 |
| CN201255147Y (en) * | 2008-09-05 | 2009-06-10 | 郑州大方桥梁机械有限公司 | Multifunction driving liquid controlled valve |
| CN101532518A (en) * | 2009-04-18 | 2009-09-16 | 安徽星马汽车股份有限公司 | Concrete pump truck pumping double-main oil cylinder automatic high-low pressure switching and equidirectional telescoping hydraulic device |
| CN102465934A (en) * | 2010-11-12 | 2012-05-23 | 北汽福田汽车股份有限公司 | Hydraulic system |
-
2010
- 2010-11-22 CN CN201010557379.8A patent/CN102478031B/en active Active
Patent Citations (4)
| 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 |
| CN201255147Y (en) * | 2008-09-05 | 2009-06-10 | 郑州大方桥梁机械有限公司 | Multifunction driving liquid controlled valve |
| CN101532518A (en) * | 2009-04-18 | 2009-09-16 | 安徽星马汽车股份有限公司 | Concrete pump truck pumping double-main oil cylinder automatic high-low pressure switching and equidirectional telescoping hydraulic device |
| CN102465934A (en) * | 2010-11-12 | 2012-05-23 | 北汽福田汽车股份有限公司 | Hydraulic system |
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| CN102478031A (en) | 2012-05-30 |
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