CN102478031A - Switching valve and pumping system - Google Patents
Switching valve and pumping system Download PDFInfo
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- CN102478031A CN102478031A CN2010105573798A CN201010557379A CN102478031A CN 102478031 A CN102478031 A CN 102478031A CN 2010105573798 A CN2010105573798 A CN 2010105573798A CN 201010557379 A CN201010557379 A CN 201010557379A CN 102478031 A CN102478031 A CN 102478031A
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Abstract
The invention discloses a switching valve and a pumping system. The switching valve comprises a valve body. The valve body is provided with a first oil inlet/outlet, a second oil inlet/outlet, a first port, a second port, a third port and a fourth port, wherein the first port and the second port are respectively communicated with the rod cavities of a left oil cylinder and a right oil cylinder; the third port and the fourth port are respectively communicated with the rodless cavities of the left oil cylinder and the right oil cylinder; first cartridge valves are respectively connected between the first oil inlet/outlet and the third port, between the first port and the second port as well as between the fourth port and the second oil inlet/outlet; second cartridge valves are respectively connected between the first oil inlet/outlet and the second port, between the fourth port and the third port as well as between the first port and the second oil inlet/outlet; the first cartridge valves and the second cartridge valves are connected with an electromagnetic directional valve; and the two oil outlets of the electromagnetic directional valve are respectively connected with the control ports of the first cartridge valves and the second cartridge valves. The switching valve provided by the invention has a simple structure, and is capable of effectively performing high and low-pressure oil way switching, so that the high and low-pressure oil way switching is extremely convenient.
Description
Technical field
The present invention relates to the valve technology, relate in particular to a kind of switching valve and pumping system.
Background technique
Need high-low voltage switching device in the pumping system of engineering machinery; To carry out the switching of high low pressure oil circuit, satisfy different pumping pressure needs, realize high pressure pumping and low pressure pumping; For example; At concrete mixer, drag in the pumping system of pump and Vehicle loaded pump, all be equipped with as being used for the switching valve that the high low pressure oil circuit switches, realize that the high low pressure pumping needs.
Figure 1A is the plan view of switching valve in the existing concrete pumping system; Figure 1B is the left view of switching valve in the existing concrete pumping system.In the existing concrete pumping system, the switching that switching valve carries out high low pressure pumping state mainly is to adopt the direction of transposing manifold block to realize, promptly changes the circulating direction of oil circuit in the switching valve through the transposing manifold block, realizes the switching of high low pressure oil circuit.Shown in Figure 1A and Figure 1B; Switching valve in the existing concrete pumping system comprises: go up manifold block 10 and following manifold block 20, fixing through bolt 30 between last manifold block 10 and the following manifold block 20, both sides have A1 mouth, A2 mouth and B1 mouth, B2 mouth respectively before and after the switching valve that last manifold block 10 and following manifold block 20 involutory backs form; Wherein, A1 mouth, A2 mouth are communicated with the rod chamber of oil cylinder, and B1 mouth, B2 mouth are communicated with the rodless cavity of oil cylinder, and the oil inlet and outlet P1 mouth of oil circuit and P2 mouth respectively with this switching valve on oil inlet and outlet and the oil hydraulic pump or the hydrovalve of pumping system be communicated with; During original state; The A1 mouth of switching valve, be communicated with the oil inlet and outlet P1 mouth of oil circuit, the A2 mouth is communicated with oil inlet and outlet P2, and B1 mouth, B2 mouth are communicated with; This moment, the high pressure oil of P1 mouth can make concrete pumping system under low pressure pumping state, to work through the rod chamber of A1 mouth entering oil cylinder; And when concrete pumping system need carry out the high pressure pumping; 6 bolts 30 on the switching valve can come loose; And retighten again together with following manifold block 20 after will going up manifold block 10 Rotate 180 degree; Make oil inlet and outlet P1 mouth to be communicated with the B1 mouth, oil inlet and outlet P2 mouth is communicated with the B2 mouth, and A1 mouth, A2 mouth are communicated with.This moment, the high pressure oil from the working connection of the pumping system of P1 mouth entering can make concrete pumping system under high pressure pumping state, to work through the rodless cavity of B1 mouth entering oil cylinder.
To sum up can find out, when the switching valve in the existing concrete pumping system carries out the switching of high low pressure oil circuit, need dismounting and re-assembly switching valve; Therefore; When the high low pressure oil circuit switches, need pumping system to shut down, make the high low pressure oil circuit switch time-consuming, effort, handoff procedure is complicated; And, in high low pressure oil circuit handoff procedure,, make hydraulic oil outflow easily owing to will dismantle to switching valve, introduced contaminants also gets into pumping system easily and causes oil circuit to pollute, and causes the system failure.
Summary of the invention
The present invention provides a kind of switching valve and pumping system, can effectively solve the problem that existing switching valve exists in high low pressure oil circuit handoff procedure, improves the convenience that switching valve carries out high low pressure oil circuit handoff procedure, avoids the pumping system oil circuit to pollute.
The present invention provides a kind of switching valve, comprising:
Valve body; Said valve body is provided with first oil inlet and outlet and second oil inlet and outlet; And first hydraulic fluid port and second hydraulic fluid port that are communicated with respectively with the rod chamber of left oil cylinder and right oil cylinder, the 3rd hydraulic fluid port and the 4th hydraulic fluid port that are communicated with respectively with the rodless cavity of said left oil cylinder and right oil cylinder;
Between said first oil inlet and outlet and the 3rd hydraulic fluid port, between said first hydraulic fluid port and second hydraulic fluid port and be connected with first cartridge valve respectively between said the 4th hydraulic fluid port and second oil inlet and outlet;
Between said first oil inlet and outlet and second hydraulic fluid port, between said the 4th hydraulic fluid port and the 3rd hydraulic fluid port and be connected with second cartridge valve respectively between said first hydraulic fluid port and second oil inlet and outlet;
Said first cartridge valve and second cartridge valve are connected with solenoid directional control valve, and two oil outlets of said solenoid directional control valve are connected with the control mouth of said first cartridge valve and second cartridge valve respectively.
The present invention provides a kind of pumping system, comprises 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, through the cartridge valve be connected with each hydraulic fluid port of valve body is set, and the solenoid directional control valve that is connected with cartridge valve; Make switching valve when carrying out the switching of high low pressure oil circuit; Only need control and get final product, and need not dismantle switching valve, can not carry out the switching of high low pressure oil circuit under the outage state at pumping system through solenoid directional control valve; Make that the switching valve of high low pressure oil circuit is very convenient, can effectively improve the working efficiency of pumping system; Simultaneously, in the high low pressure oil circuit handoff procedure, the oil circuit pollution problem that causes because of the dismounting switching valve can not occur in the existing technology yet, can effectively guarantee the pumping system proper functioning, reduce the fault odds.Switch valve structure provided by the invention is simple, and it is convenient to realize, can effectively carry out the switching of high low pressure oil circuit.
Description of drawings
Figure 1A is the plan view of switching valve in the existing concrete pumping system;
Figure 1B is the left view of switching valve in the existing concrete pumping system;
Fig. 2 is the structural representation of cartridge valve among the switching valve embodiment of the present invention;
Fig. 3 A is switching valve embodiment's of the present invention plan view;
Fig. 3 B is switching valve embodiment's of the present invention rear view;
Fig. 3 C is switching valve embodiment's of the present invention plan view;
Fig. 3 D is switching valve embodiment's of the present invention right elevation;
Fig. 3 E is switching valve embodiment's of the present invention left view;
Fig. 4 is the internal structure schematic representation of valve body in the embodiment of the invention;
Fig. 5 is the internal structure schematic representation of center valve body in the embodiment of the invention;
Fig. 6 is the linkage structure schematic representation of switching valve embodiment of the present invention and oil cylinder;
Fig. 7 A is switching valve embodiment of the present invention catenation principle schematic representation between each valve and the hydraulic fluid port when carrying out the low pressure pumping;
Fig. 7 B is switching valve embodiment of the present invention catenation principle schematic representation between each valve and the hydraulic fluid port when carrying out the high pressure pumping.
Reference character:
The last manifold block of 10-; Manifold block under the 20-; The 30-bolt;
The 201-spool; The 202-valve pocket; The 203-spring;
The 204-baffle plate; The 205-control chamber; Chamber at the bottom of the 206-;
The 207-annular chamber; The 1-valve body; 21-first cartridge valve;
22-second cartridge valve; The 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; The 171-lumen pore;
The 172-lumen pore; The 173-lumen pore; The 174-lumen pore;
The 175-lumen pore; The 176-lumen pore; The 4-center valve body;
The 5-shuttle valve; The 41-cavity; The 18-cover plate;
The 300-switching valve; 100-left side oil cylinder; The right oil cylinder of 200-.
Embodiment
For the purpose, technological scheme and the advantage that make the embodiment of the invention clearer; To combine the accompanying drawing in the embodiment of the invention below; Technological scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment is the present invention's part embodiment, rather than whole embodiments.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment who is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
In view of having switching valve now when carrying out the high-pressure oil passage switching; Need the dismounting switching valve just can carry out the high low pressure oil circuit and switch the problem that exists, the inventor provides a kind of switching valve, can be through cartridge valve and the solenoid directional control valve that on valve body, is provided with; Utilize solenoid directional control valve to control the conducting or the disconnection of cartridge valve; And then the switching of realization high low pressure oil circuit, make that the switching of high low pressure oil circuit is very convenient, can effectively avoid existing dismounting switching valve just can carry out the problem that the high low pressure oil circuit switches existence.
At first will describe below, so that technological scheme of the present invention is had a better understanding cartridge valve in the embodiment of the invention and solenoid directional control valve.
Fig. 2 is the structural representation of cartridge valve among the switching valve embodiment of the present invention.Cartridge valve that relates in the present embodiment switching valve and solenoid directional control valve all can be the 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 its electromagnet thrust capable of using promotes valve core movement with the conversion 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 oil outlets of solenoid directional control valve; And then the flow direction of the oil outlet through changing solenoid directional control valve, i.e. main hydraulic fluid port A and the main hydraulic fluid port B conducting or the disconnection of may command cartridge valve.As shown in Figure 2, cartridge valve comprises: spool 201, valve pocket 202, spring 203 and baffle plate 204, and have control chamber 205 on this cartridge valve as control mouthful x; And as the chamber, the end 206 of main hydraulic fluid port A with as the annular chamber 207 of main hydraulic fluid port B, when injecting high pressure oil in the control mouthful x, spool can be in the seat hole of tightly keeping out under the high pressure oil effect at valve pocket 202; Make hydraulic fluid port A of winner and the main hydraulic fluid port B can't conducting, otherwise, when a control mouthful x communicates with oil return; The spring force that main hydraulic fluid port A internal pressure oil only need overcome spring 203 can force upwards jack-up of spool 201; Thereby, therefore, be connected with solenoid directional control valve through control mouth x with cartridge valve with main hydraulic fluid port B conducting; Can under the control of the control of solenoid directional control valve oil, control conducting or disconnection between main hydraulic fluid port A and the main hydraulic fluid port B.In the present embodiment, be exactly, change the circulating direction in switching valve of the pressure oil that gets into from oil inlet and outlet through the cooperating of solenoid directional control valve and cartridge valve, and then the switching of realization high low pressure oil circuit.
Fig. 3 A is switching valve embodiment's of the present invention plan view; Fig. 3 B is switching valve embodiment's of the present invention rear view; Fig. 3 C is switching valve embodiment's of the present invention plan view; Fig. 3 D is switching valve embodiment's of the present invention right elevation; Fig. 3 E is switching valve embodiment's of the present invention left view.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; This first cartridge valve 21 and second cartridge valve 22 promptly are above-mentioned cartridge valves shown in Figure 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 first oil inlet and outlet 11, second oil inlet and outlet 12, first hydraulic fluid port 13, second hydraulic fluid port 14, the 3rd hydraulic fluid port 15 and the 4th hydraulic fluid port 16, the first hydraulic fluid ports 13 and second hydraulic fluid port 14 is communicated with the left oil cylinder of pumping system and the rod chamber of right oil cylinder respectively, and the 3rd hydraulic fluid port 15 and the 4th hydraulic fluid port 16 are communicated with the rodless cavity of left oil cylinder and right oil cylinder respectively; And between first oil inlet and outlet 11 and the 3rd hydraulic fluid port 15, between first hydraulic fluid port 13 and second hydraulic fluid port 14 and be connected with first cartridge valve 21 respectively between the 4th hydraulic fluid port 16 and second oil inlet and outlet 12; Between first oil inlet and outlet 11 and second hydraulic fluid port 14, between the 4th hydraulic fluid port 16 and the 3rd hydraulic fluid port 15 and be connected with second cartridge valve 22 respectively between first hydraulic fluid port 13 and second oil inlet and outlet 12; The control mouth x of first cartridge valve 21 and second cartridge valve 22 is communicated with the oil outlet Ad and the oil outlet Bd of solenoid directional control valve 3 respectively; Make solenoid directional control valve 3 to control the conducting or the disconnection of first cartridge valve 21 and second cartridge valve 22 through the oily circulating direction of the control of control oil outlet Ad and oil outlet Bd.
In the present embodiment, each first cartridge valve 21 that is connected between each hydraulic fluid port can be formed the first cartridge valve group; Second cartridge valve 22 that is connected between each hydraulic fluid port can be formed the second cartridge valve group.Because the control mouth x of first cartridge valve in the first cartridge valve group and the control mouth x of second cartridge valve in the second cartridge valve group are communicated with the oil outlet Ad and the oil outlet Bd of solenoid directional control valve 3 respectively; Therefore; In solenoid directional control valve 3, be connected with control oil; And when the control mouth x of first cartridge valve 21 was connected with the control oil with elevated pressures, the control mouth x of second cartridge valve 22 will communicate with oil return, therefore; At synchronization, first cartridge valve 21 and second cartridge valve 22 only have one of them can be on state.
Particularly; When being connected with the control oil of high pressure in first cartridge valve 21 in the first cartridge valve group; Will break off between the main hydraulic fluid port A of first cartridge valve 21 in the first cartridge valve group and the main hydraulic fluid port B; And will conducting between main hydraulic fluid port A and the main hydraulic fluid port B of second cartridge valve 21 in the second cartridge valve group; Therefore; Between first oil inlet and outlet 11 and second hydraulic fluid port 14, between the 4th hydraulic fluid port 16 and the 3rd hydraulic fluid port 15 and will be on state through second cartridge valve 22 between first hydraulic fluid port 13 and second oil inlet and outlet 12, and between first oil inlet and outlet 11 and the 3rd hydraulic fluid port 15, between first hydraulic fluid port 13 and second hydraulic fluid port 14 and be in off state between the 4th hydraulic fluid port 16 and second oil inlet and outlet 12; Otherwise; Solenoid directional control valve 3 switching-overs make the control mouth x of the cartridge valve 21 of winning be connected with low voltage control oil; When the control mouth x of second cartridge valve 22 is connected with high voltage control oil; Between first oil inlet and outlet 11 and the 3rd hydraulic fluid port 15, between first hydraulic fluid port 13 and second hydraulic fluid port 14 and will be on state through first cartridge valve 21 between the 4th hydraulic fluid port 16 and second oil inlet and outlet 12, between first oil inlet and outlet 11 and second hydraulic fluid port 14, between the 4th hydraulic fluid port 16 and the 3rd hydraulic fluid port 15 and will be in off state between first hydraulic fluid port 13 and second oil inlet and outlet 12.Can find out, the circulating direction of the control oil through the control solenoid directional control valve, i.e. the conductive channel of oil circuit in the may command switching valve, thus can realize the switching of oil circuit, its concrete implementation procedure will be elaborated in the back.
Fig. 4 is the internal structure schematic representation of valve body in the embodiment of the invention.In the present embodiment, first cartridge valve and second cartridge valve all can be plugged in the valve body 1, particularly; Like Fig. 3 C and shown in Figure 5; Can be provided with lumen pore in the valve body 1, the cartridge valve 21 of winning can be plugged in the lumen pore with second cartridge valve 22, and be fixed in the lumen pore through being fixed on valve body 1 surperficial cover plate 18; In the present embodiment; Be provided with 66 lumen pores adaptive in the valve body 1, 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 the fluid passage in each lumen pore with the cartridge valve shape and size; Make to be plugged between fluid passage that cartridge valve in the lumen pore can be through lumen pore and each hydraulic fluid port to be connected, thereby set up the connecting passage between each hydraulic fluid port in valve body 1 inside.Can find out, through cartridge valve is plugged in the valve body, and utilize the fluid passage that is provided with in the valve body to be communicated with, make the compact structure of whole switching valve to have the better seal effect, can effectively avoid the oil circuit bad connection and leakage of oil occurs with each hydraulic fluid port.
In the present embodiment, solenoid directional control valve 3 is installed on the valve body 1, and the oil outlet Ad of solenoid directional control valve 3 is connected with the control mouth x of first cartridge valve 21 and second cartridge valve 22 through the fluid passage that is arranged on the valve body 1 respectively with oil outlet Bd.
In the present embodiment, shown in Fig. 3 A and Fig. 3 B, also can be provided with center valve body 4 on the valve body 1, and be provided with shuttle valve 5 in this center valve body 4, the control oil of solenoid directional control valve 3 can flow into the oil inlet P d of this solenoid directional control valve 3 through shuttle valve 5.
Fig. 5 is the internal structure schematic representation of center valve body in the embodiment of the invention.Shown in Fig. 5 and Fig. 3 A, this center valve body 4 is provided with cavity 41, make shuttle valve 5 can be plugged in this cavity 41, and cavity 41 is provided with the fluid passage that is communicated with solenoid directional control valve; Simultaneously; On center valve body 4, also be provided with oily oil inlet and outlet PX1 of control and PX2; Make extraneous control oil to get into shuttle valve and the final oil inlet P d that gets into solenoid directional control valve through this oil inlet and outlet PX1 and PX2; Can effectively guarantee to get into the pressure of solenoid directional control valve inner control oil, improve the control effect.
In the present embodiment; Above-mentioned cartridge valve, solenoid directional control valve, shuttle valve are the valve of standard, through cavity that cooperates with standard valve and the fluid passage that is provided with are set on valve body and center valve body; Can effectively realize between above-mentioned each hydraulic fluid port and the valve, and being connected of each hydraulic fluid port between valve and the valve.
For technological scheme of the present invention is had a better understanding, will be elaborated with the concrete application of the embodiment of the invention below.
Fig. 6 is the linkage structure schematic representation of switching valve embodiment of the present invention and oil cylinder; Fig. 7 A is switching valve embodiment of the present invention catenation principle schematic representation between each valve and the hydraulic fluid port when carrying out the low pressure pumping; Fig. 7 B is switching valve embodiment of the present invention catenation principle schematic representation between each valve and the hydraulic fluid port when carrying out the high pressure pumping.As shown in Figure 6; The first hydraulic fluid port E2 of present embodiment switching valve 300 is communicated with the rod chamber E2 of left oil cylinder 100; The 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; The first oil inlet and outlet C is connected with oil hydraulic pump or hydrovalve respectively with the second oil inlet and outlet D; Through the solenoid directional control valve on the switching valve 300 3; Being may command gets into the oil circuit direction behind the switching valve 300 from the first oil inlet and outlet C or the second oil inlet and outlet D, thereby can make pumping system be operated in high pressure pumping state or low pressure pumping state.
In the present embodiment; Shown in Fig. 7 A and Fig. 7 B, the cartridge valve A1 among the figure, cartridge valve A4, cartridge valve A5 are first cartridge valve, and cartridge valve B2, cartridge valve B3, cartridge valve B6 are second cartridge valve; Valve C4 is a shuttle valve; Valve D3 is a solenoid directional control valve, and the oil outlet Ad of solenoid directional control valve is connected with second cartridge valve with first cartridge valve respectively with oil outlet Bd, thereby is the conducting or the disconnection of may command first cartridge valve and second cartridge valve through solenoid directional control valve.Particularly, shown in Fig. 7 A, when pumping system need carry out the low pressure pumping; But the solenoid directional control valve no electric circuit, the control oil of PX1, the entering of PX2 mouth can be through the shuttle valve side hydraulic oil that pressure is high at this moment, i.e. and high pressure side control oil acts on the control chamber of cartridge valve A1, cartridge valve A4 and cartridge valve A5; Therefore, first cartridge valve all is in off state, then is on state as cartridge valve B2, cartridge valve B3, cartridge valve B6; The high pressure oil of working connection gets into the annular chamber of cartridge valve B3 from the first oil inlet and outlet C at this moment; 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 through cartridge valve B3, and enters into the rod chamber F2 of right oil cylinder through flexible pipe; Under the effect of rod chamber F2 inner high voltage oil; Pressure oil in the rodless cavity E1 enters into the chamber, the end of cartridge valve B6 through the 4th hydraulic fluid port E1; Behind the spring force that overcomes cartridge valve B6, flow out from the annular chamber of cartridge valve B6, and get into the rodless cavity F1 of left oil cylinder through the 3rd hydraulic fluid port F1; Under the effect of rodless cavity F1 inner high voltage oil; Pressure oil in the rod chamber E2 gets into the chamber, the end of cartridge valve B2 through the first hydraulic fluid port E2, and after overcoming the spring force of cartridge valve B2, flows out from annular chamber; The final second oil inlet and outlet D that arrives; Again be back to the fuel tank of pumping system through the hydraulic oil of the second oil inlet and outlet D, thereby realize the low pressure pumping, the circulating direction of oil circuit specifically can be referring to the direction of arrow shown in Fig. 7 A.
Similarly, shown in Fig. 7 B, when pumping system need carry out the high pressure pumping; The solenoid directional control valve energising, the control oil of PX1, PX2 mouth can act on the control chamber of cartridge valve B2, cartridge valve B3, cartridge valve B6, therefore through the shuttle valve side hydraulic oil that pressure is high at this moment; Second cartridge valve all is in off state; Cartridge valve A1, cartridge valve A4, cartridge valve A5 then are on state, after the high pressure oil of working connection gets into valve body from the first oil inlet and outlet C at this moment, can get into the rodless cavity F1 of left oil cylinder through cartridge valve A4 and the 3rd hydraulic fluid port F1; Under the high pressure oil effect of hydraulic oil in rodless cavity F1 in the rod chamber E2; Get into the rod chamber F2 of right oil cylinder from the first hydraulic fluid port E2, cartridge valve A5 and the second hydraulic fluid port F2, the hydraulic oil in the rodless cavity E1 is back to fuel tank from the 4th hydraulic fluid port E1, cartridge valve A1 from the second oil inlet and outlet D under the effect of rod chamber F2 inner high voltage oil; Thereby realize the high pressure pumping, the circulating direction of oil circuit specifically can be referring to 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 each hydraulic fluid port on cartridge valve and the valve body, pouring orifice A on the cartridge valve and pouring orifice B can be according to suitable Placements; Perhaps corresponding relation is connected with other hydraulic fluid port; Thereby guarantee under solenoid directional control valve 3 controls, can between first oil inlet and outlet 11 and second oil inlet and outlet 12, form high pressure pumping oil circuit through the conducting of main hydraulic fluid port A on first cartridge valve 21 and main hydraulic fluid port B; Perhaps,, between first oil inlet and outlet 11 and second oil inlet and outlet 12, form low pressure pumping oil circuit, thereby satisfy the high low pressure pumping needs of switching valve through the conducting of main hydraulic fluid port A and main hydraulic fluid port B on second cartridge valve 22.
To sum up, in the present embodiment switching valve, through the cartridge valve that is connected with each hydraulic fluid port of valve body is set; And the solenoid directional control valve that is connected with cartridge valve, make switching valve carry out the high low pressure oil circuit when switching, only need control and get final product through solenoid directional control valve; And need not dismantle switching valve; Can not carry out the switching of high low pressure oil circuit at pumping system under the outage state, make that the switching valve of high low pressure oil circuit is very convenient, can effectively improve the working efficiency of pumping system; Simultaneously, in the high low pressure oil circuit handoff procedure, the oil circuit pollution problem that causes because of the dismounting switching valve can not occur in the existing technology yet, can effectively guarantee the pumping system proper functioning, reduce the fault odds.The present embodiment switch valve structure is simple, and it is convenient to realize, can effectively carry out the switching of high low pressure oil circuit.
The embodiment of the 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, first hydraulic fluid port of this switching valve and second hydraulic fluid port are communicated with the rod chamber of left oil cylinder and right oil cylinder through flexible pipe respectively; The 3rd hydraulic fluid port of switching valve and the 4th hydraulic fluid port are communicated with the rodless cavity of left oil cylinder and right oil cylinder through flexible pipe respectively.Switching valve in the present embodiment pumping system can carry out the switching of high low pressure oil circuit in the pumping system working procedure; Make that the switching of high low pressure oil circuit is very convenient; Do not need pumping system to shut down in the high low pressure oil circuit handoff procedure, can effectively improve the working efficiency of pumping system.
What should explain at last is: above embodiment is only in order to explaining technological scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technological scheme that aforementioned each embodiment put down in writing, and perhaps part technical characteristics wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technological scheme of relevant art scheme.
Claims (9)
1. a switching valve is characterized in that, comprising:
Valve body; Said valve body is provided with first oil inlet and outlet and second oil inlet and outlet; And first hydraulic fluid port and second hydraulic fluid port that are communicated with respectively with the rod chamber of left oil cylinder and right oil cylinder, the 3rd hydraulic fluid port and the 4th hydraulic fluid port that are communicated with respectively with the rodless cavity of said left oil cylinder and right oil cylinder;
Between said first oil inlet and outlet and the 3rd hydraulic fluid port, between said first hydraulic fluid port and second hydraulic fluid port and be connected with first cartridge valve respectively between said the 4th hydraulic fluid port and second oil inlet and outlet;
Between said first oil inlet and outlet and second hydraulic fluid port, between said the 4th hydraulic fluid port and the 3rd hydraulic fluid port and be connected with second cartridge valve respectively between said first hydraulic fluid port and second oil inlet and outlet;
Said first cartridge valve and second cartridge valve are connected with solenoid directional control valve, and two oil outlets of said solenoid directional control valve are connected with the control mouth of said first cartridge valve and second cartridge valve respectively.
2. switching valve according to claim 1 is characterized in that, said first cartridge valve and second cartridge valve all are plugged in the said valve body.
3. switching valve according to claim 2; It is characterized in that; Be provided with the lumen pore that plugs said first cartridge valve and second cartridge valve in the said valve body, said first cartridge valve and second cartridge valve are plugged in the said lumen pore through the cover plate that is installed in valve body surface.
4. switching valve according to claim 1; It is characterized in that said first cartridge valve is connected with said first oil inlet and outlet, first hydraulic fluid port, second hydraulic fluid port, the 3rd hydraulic fluid port, the 4th hydraulic fluid port or second oil inlet and outlet through the fluid passage that is arranged in the said valve body;
Said second cartridge valve is connected with said first oil inlet and outlet, first hydraulic fluid port, second hydraulic fluid port, the 3rd hydraulic fluid port, the 4th hydraulic fluid port or second oil inlet and outlet through the fluid passage that is arranged in the said valve body.
5. according to the arbitrary described switching valve of claim 1～4, it is characterized in that said solenoid directional control valve is installed on the said valve body.
6. switching valve according to claim 5 is characterized in that, two oil outlets of said solenoid directional control valve are connected with the control mouth of said first cartridge valve and second cartridge valve through the fluid passage that is arranged on the valve body respectively.
7. switching valve according to claim 5 is characterized in that, also is installed with center valve body on the said valve body, is inserted with shuttle valve in the said center valve body;
The filler opening of said solenoid directional control valve is connected with said shuttle valve, and the control oil of said solenoid directional control valve flows into said solenoid directional control valve through said shuttle valve.
8. a pumping system is characterized in that, comprises the arbitrary described switching valve of left oil cylinder, right oil cylinder and claim 1～7.
9. pumping system according to claim 8 is characterized in that, first hydraulic fluid port of said switching valve and second hydraulic fluid port are communicated with the rod chamber of said left oil cylinder and right oil cylinder through flexible pipe respectively;
The 3rd hydraulic fluid port of said switching valve and the 4th hydraulic fluid port are communicated with the rodless cavity of said left oil cylinder and right oil cylinder through flexible pipe respectively.
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 |
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| 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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| CN102478031A true CN102478031A (en) | 2012-05-30 |
| CN102478031B CN102478031B (en) | 2015-09-09 |
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| CN201010557379.8A Active CN102478031B (en) | 2010-11-22 | 2010-11-22 | Switching valve and pumping system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748338A (en) * | 2012-07-25 | 2012-10-24 | 中联重科股份有限公司 | Rotary valve and double-cylinder pumping equipment |
| WO2014005398A1 (en) * | 2012-07-05 | 2014-01-09 | 中联重科股份有限公司 | Pumping device and pumping equipment comprising same |
| CN112576564A (en) * | 2020-11-26 | 2021-03-30 | 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 |
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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 |
| 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 |
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| WO2014005398A1 (en) * | 2012-07-05 | 2014-01-09 | 中联重科股份有限公司 | Pumping device and pumping equipment comprising same |
| CN102748338A (en) * | 2012-07-25 | 2012-10-24 | 中联重科股份有限公司 | Rotary valve and double-cylinder pumping equipment |
| 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 |
| CN112576564A (en) * | 2020-11-26 | 2021-03-30 | 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 |
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| Publication number | Publication date |
|---|---|
| CN102478031B (en) | 2015-09-09 |
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Effective date of registration: 20200927 Address after: No.202 Xuanfu street, Xuanhua District, Zhangjiakou, Hebei Province Patentee after: Hebei Leisa Heavy Construction Machinery Co., Ltd Address before: 102206 Changping District City, Shahe, Sha Yang Road, Beijing Patentee before: BEIQI FOTON MOTOR Co.,Ltd. |