CN102374310A - High-low pressure conversion device and pumping system - Google Patents
High-low pressure conversion device and pumping system Download PDFInfo
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- CN102374310A CN102374310A CN2011103383350A CN201110338335A CN102374310A CN 102374310 A CN102374310 A CN 102374310A CN 2011103383350 A CN2011103383350 A CN 2011103383350A CN 201110338335 A CN201110338335 A CN 201110338335A CN 102374310 A CN102374310 A CN 102374310A
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 88
- 238000005086 pumping Methods 0.000 title claims abstract description 24
- 239000003921 oil Substances 0.000 claims description 73
- 239000010720 hydraulic oil Substances 0.000 claims description 25
- 239000002828 fuel tank Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 description 11
- 238000010276 construction Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
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Abstract
The invention discloses a high-low pressure conversion device, which comprises a high-low pressure reversing valve, a first oil cylinder and a second oil cylinder, wherein the high-low pressure reversing valve comprises a valve body with a through valve cavity and a valve core arranged in the valve cavity. The invention also discloses a pumping system. By arranging the valve core with the annular groove and the side groove, high-low pressure conversion can be realized through the sliding of the valve core in the valve cavity.
Description
Technical field
The present invention relates to Hydraulic Field, particularly, relate to a kind of high low pressure conversion equipment and a kind of pumping system.
Background technique
In the engineering construction process, need to transport, pour into a mould a large amount of concrete, conventional construction method is to adopt wheelbarrow, tower crane etc., but these methods obviously do not meet the modern project construction requirement.Concrete pump pumping construction mode has advantages such as efficient height, quality is good, labor intensity is low, uses more and more widely in the engineering construction in modern times.
Because the concrete material condition becomes increasingly complex, the application of strong concrete surpasses to come extensive more, and concrete pump need be exported pumping pressure scope widely.Concrete pumping pressure depends on that concrete cylinder cylinder diameter, pumping oil cylinder cylinder diameter, pumping cylinder rod footpath, hydraulic system pressure and pressure oil get into the position of oil cylinder.Under the identical situation of concrete cylinder cylinder diameter, pumping oil cylinder cylinder diameter, pumping cylinder rod footpath, hydraulic system pressure, generally adopt the high low pressure conversion equipment to improve concrete operating range.
It is to realize that through changing pumps hydraulic system Placement pressure oil gets into the position change of pumping oil cylinder that high low pressure switches; When pressure oil when rod chamber advances to promote piston; Because active area is less; The outlet pressure of concrete pump is also less, and speed is then very fast, and this pumping mode is the low pressure pumping; And when pressure oil when rodless cavity advances to promote piston because active area is bigger, the outlet pressure of concrete pump is also bigger, speed is then slower, this pumping mode is the high pressure pumping.
At present, the high low pressure conversion can be divided into four kinds of modes basically: first kind is to realize the high low pressure conversion through changeing sebific duct; Second kind is to adopt the mode of rotating the manifold block cover plate to change the oil circuit communication relation to realize the high low pressure conversion; The third is the form that adopts rotary valve, and the communication that changes oil circuit through 90 ° of rotational valve cores realizes that high low pressure switches; The 4th kind is to adopt six cartridge valves and a solenoid directional control valve, realizes automatically controlled high low pressure conversion.
Preceding two kinds of manual high low pressure switching mode operations are cumbersome, need shut down release during conversion, take hydraulic system apart; Make the internal system oil contamination after hydraulic system is taken apart easily, also can go out by some hydraulic fluid leak, cause certain pollution and waste.When adopting six cartridge valves to realize that high low pressure switches, any cartridge valve breaks down, and the high low pressure switching function will lose efficacy, even can cause whole hydraulic system fault, and this kind mode reliability is not high enough.
So the high low pressure switching method that adopts usually at present is the third, promptly adopts the form of rotary valve to switch high low pressure.Disclose a kind of concrete pump high low pressure conversion equipment among the Chinese patent CN 01240425, as shown in fig. 1, this high low pressure conversion equipment mainly comprises valve body 1, valve body 2, valve plate 3, rotary valve 4, end cap 5, end cap 6; Valve body 1 links to each other with oil cylinder I, and valve body 2 links to each other with oil cylinder II, valve body 1 with valve plate 3 is installed above the valve body 2; In the middle of valve plate 3, be provided with rotary valve 4, all be provided with 3 holes on each in valve body 1 and the valve body 2, the hole, upper strata of valve body 1 and valve body 2 is equipped with vertical hole; This vertical hole is identical with oil cylinder II with oil cylinder I respectively, and the hole, middle level of valve body 1 and valve body 2 also is provided with transverse holes, and this transverse holes links to each other with the turnover oil pipe respectively; Be provided with six holes in the valve plate, communicate with valve body 1 and six holes on the valve body 2 respectively, rotary valve 4 is provided with two holes, four grooves; This rotary valve 4 can rotate, and 0 ° and 90 ° of two positions are arranged.
But; The spool of above-mentioned high low pressure conversion equipment is because there is oil through at the center, and the side also has oil groove, and the external diameter of spool must be greater than twice oilhole latus rectum; Can bring spool processing problems (it is reported that domestic highi degree of accuracy spool working ability is generally below Φ 50mm) thus; Under big system pressure, valve core rotation needs very big moment of torsion, and also there is certain difficulty in operation.
Therefore, how to provide a kind of high low pressure conversion equipment that is easy to process to become the technical problem that related domain needs to be resolved hurrily.
Summary of the invention
The purpose of this invention is to provide a kind of high low pressure conversion equipment and pumping system, this high low pressure conversion equipment has the high low pressure selector valve that is easy to comprise the spool that is easy to process.
To achieve these goals; The present invention provides a kind of high low pressure conversion equipment, and this high low pressure conversion equipment comprises high low pressure selector valve, first oil cylinder and second oil cylinder, and this high low pressure selector valve comprises the valve body of the valve pocket with perforation and is arranged on the spool in the said spool chamber; Wherein, Said spool comprises body, and this body is provided with two circular grooves and two side channels, and these two side channels are provided with along the circumferential interval of said body; Said spool can be in said valve pocket axially slides into another position from a position along this valve pocket; Thereby said high low pressure conversion equipment is in respectively under high pressure conditions and the low-pressure state, under high pressure conditions, a rod chamber connection in said two circular grooves with the rod chamber and said second oil cylinder of said first oil cylinder; Under low-pressure state, another in said two circular grooves is communicated with the rodless cavity of said first oil cylinder and the rodless cavity of said second oil cylinder.
Preferably, said two side channels are between said two circular grooves.
Preferably; Said valve body also comprises first oilhole, second oilhole, the 3rd oilhole, the 4th oilhole, the 5th oilhole and the 6th oilhole; This first oilhole, second oilhole, the 3rd oilhole, the 4th oilhole, the 5th oilhole and the 6th oilhole all connect with said valve pocket; And the opening of said first oilhole, said the 3rd oilhole and said the 5th oilhole is positioned on the side of said valve body; The opening of said second oilhole, the 4th oilhole and said the 6th oilhole is positioned on another side of said valve body, and said first oilhole is communicated with the rod chamber of said first oil cylinder, and said second oilhole is communicated with the rod chamber of said second oil cylinder; Said the 3rd oilhole is communicated with the rodless cavity of said first oil cylinder; Said the 4th oilhole is communicated with the rodless cavity of said second oil cylinder, and under high pressure conditions, one in said two side channels with said first oilhole and the connection of said the 5th oilhole; In said two side channels another is communicated with said second oilhole and said the 6th oilhole; Under low-pressure state, in said two side channels one is communicated with said the 3rd oilhole and said the 5th oilhole, and another in said two side channels is communicated with said second oilhole with said the 6th oilhole.
Preferably; Said high low pressure selector valve also comprises a plurality of seal rings; The said body of said spool is provided with a plurality of seal grooves, and these a plurality of seal grooves are between said circular groove and said side channel, and said a plurality of seal rings are separately positioned in said a plurality of seal groove.
Preferably; In said first oilhole of said valve body, said second oilhole, said the 3rd oilhole, said the 4th oilhole, said the 5th oilhole and said the 6th oilhole at least one comprises blind hole and aperture; This aperture is arranged on the bottom of said blind hole, and this blind hole is communicated with said valve pocket.
Preferably, the aperture of said aperture is less than the width of said seal ring.
Preferably; Said first oilhole, said the 3rd oilhole and said the 5th oilhole and said second oilhole, the 4th oilhole) and said the 6th oilhole about the central axis of said valve pocket symmetry, said two side channels of said spool are about the central axis symmetry of said body.
Preferably, the said body of said spool is provided with at least one ridge, is formed with the chute that matches with said ridge on the inwall of the said valve pocket of said valve body, and said at least one ridge is on the part between two said side channels.
Preferably, said ridge is two, and these two ridges are about the center longitudinal axis symmetry of said side channel.
Preferably, said high low pressure conversion equipment also comprises the spool moving assembly, and this spool moving assembly can be along the said spool of moving axially of said valve pocket.
Preferably; Said spool moving assembly comprises first blind flange, second blind flange, driving member and bias piece; Said first blind flange and said second blind flange are separately fixed on two sides that connected by said valve pocket of said valve body, and with said valve pocket sealing, said driving member can penetrate said first blind flange and promote said spool moving axially along said valve pocket; Said bias piece is arranged between said spool and said second blind flange in the cavity, with the said spool of bias voltage.
Preferably; Said spool moving assembly comprises first blind flange and second blind flange; Said first blind flange and said second blind flange are separately fixed on two sides that connected by said valve pocket of said valve body; And with said valve pocket sealing, said first blind flange is provided with the first hydraulic control oilhole that communicates with said valve pocket, and said second blind flange is provided with the second hydraulic control oilhole that communicates with said valve pocket.
Preferably; Said high low pressure conversion equipment also comprises hydraulic control system; This hydraulic control system comprises control valve, oil pump and the fuel tank of fluid connection; Said first hydraulic control oilhole and the said second hydraulic control oilhole are connected to said fuel tank through said control valve, and said control valve is used for controlling the flow direction of said hydraulic control system hydraulic oil.
As also aspect of the present invention, a kind of pumping system is provided, this pumping system comprises the high low pressure conversion equipment, wherein, this high low pressure conversion equipment is an above-mentioned high low pressure conversion equipment provided by the present invention.
In high low pressure conversion equipment of the present invention; The spool that has circular groove and side channel through setting; Can simplify the manufacturing of high low pressure selector valve; And can realize the high low pressure conversion through the slip of spool in valve pocket, and make it possible on spool, be provided with seal ring, thereby improve the sealability of high low pressure selector valve.
Other features and advantages of the present invention will partly specify in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with following embodiment, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is a kind of high low pressure conversion equipment of the prior art;
Fig. 2 is the high low pressure selector valve in the high low pressure conversion equipment of the present invention;
Fig. 3 is the stereogram of the spool of the high low pressure selector valve shown in Fig. 2;
Fig. 4 is the plan view of the spool shown in Fig. 3;
Fig. 5 is the valve body of the high low pressure selector valve shown in Fig. 2;
Fig. 6 is the main sectional view of the valve body shown in Fig. 5;
Fig. 7 is the partial enlarged view of the valve body shown in Fig. 6;
Fig. 8 is the schematic representation of high low pressure conversion equipment of the present invention under high pressure conditions;
Fig. 9 is the schematic representation of high low pressure conversion equipment of the present invention under low-pressure state;
Figure 10 is the schematic representation that high low pressure conversion equipment of the present invention is equipped with a kind of adjusting part of mode of execution; With
Figure 11 is the schematic representation that high low pressure conversion equipment of the present invention is equipped with the adjusting part of another kind of mode of execution.
Description of reference numerals
1 first valve body spare, 2 second valve body spares
3 valve plates, 4 rotary valves
5 first end caps, 6 second end caps
The I first oil cylinder II second oil cylinder
10 high low pressure selector valves, 11 valve bodies
12 spools, 13 seal rings
The 11c second oilhole 11d the 3rd oilhole
11e the 4th oilhole 11f the 5th oilhole
11g the 6th oilhole 11h chute
The 14a first blind flange 14b second blind flange
110b blind hole 111b aperture
The 141a first hydraulic control oilhole 141b second hydraulic control oilhole
30 oil pumps, 40 fuel tanks
Embodiment
Be elaborated below in conjunction with the accompanying drawing specific embodiments of the invention.Should be understood that embodiment described herein only is used for explanation and explains the present invention, is not limited to the present invention.
Shown in Fig. 8 to Figure 11, the present invention provides a kind of high low pressure conversion equipment, and this high low pressure conversion equipment comprises high low pressure selector valve 10, the first oil cylinder I and the second oil cylinder II; High low pressure selector valve 10 comprises the valve body 11 of the valve pocket 11a with perforation and is arranged on the spool 12 among the valve pocket 11a; Wherein, shown in Fig. 3 and Fig. 4, spool 12 comprises body 12a; This body 12a is provided with two circular groove 12b and two side channel 12c; These two side channel 12c are provided with along the circumferential interval of body 12a, spool 12 can be in valve pocket 11a along this valve pocket 11a axially slide into another position from a position, thereby said high low pressure conversion equipment is in respectively under high pressure conditions and the low-pressure state; Under high pressure conditions; Among two circular groove 12b one is communicated with the rod chamber of the said first oil cylinder I and the rod chamber of the second oil cylinder II, under low-pressure state, and the rodless cavity that another among two circular groove 12b will the said first oil cylinder I and rodless cavity connection of the second oil cylinder II.
In the present invention; The body 12a of the spool 12 of high low pressure selector valve 10 is provided with high pressure conditions and the low-pressure state that the circular groove 12b that works in coordination and side channel 12c realize high low pressure conversion equipment of the present invention; Need not on the body of spool 12, through hole to be set, therefore, reduced the size of spool 12; Reduce the difficulty of processing of spool 12, thereby simplified the course of working of the high low pressure selector valve 10 of high low pressure conversion equipment provided by the present invention.And, can realize the high low pressure conversion of said high low pressure conversion equipment through the slip of spool 12 in valve pocket 11a, the operating process of the high low pressure conversion of simplification.
When high low pressure conversion equipment of the present invention is in high pressure conditions; Hydraulic oil gets into the rodless cavity of the first oil cylinder I; At this moment; The rodless cavity of the rodless cavity of the first oil cylinder I and the second oil cylinder II does not communicate, and the circular groove 12b of the side of the rod chamber of the rod chamber of the first oil cylinder I and the second oil cylinder II through being positioned at spool 12 is connected.
At this moment, the rodless cavity of the first oil cylinder I communicates with oil inlet hole through a side channel 12c on the spool 12, and the rodless cavity of the second oil cylinder II communicates with oil outlet through another side channel 12c on the spool 12.
In the present invention, the concrete form of side channel 12c is not had specific (special) requirements, as long as can realize being communicated with the through hole on the valve body 11.
Preferably, in the present invention, two side channel 12c are between two circular groove 12b, thus the structure of simplification high low pressure selector valve 10.
Usually; High low pressure selector valve 10 is two six-way valves; That is, the valve body 11 of this high low pressure selector valve 10 also comprises the first oilhole 11b, the second oilhole 11c, the 3rd oilhole 11d, the 4th oilhole 11e, the 5th oilhole 11f and the 6th oilhole 11g, and this first oilhole 11b, the second oilhole 11c, the 3rd oilhole 11d, the 4th oilhole 11e, the 5th oilhole 11f and the 6th oilhole 11g all connect with valve pocket 11a; And the opening of the first oilhole 11b, the 3rd oilhole 11d and the 5th oilhole 11f is positioned on the side of valve body 11; The opening of the second oilhole 11c, the 4th oilhole 11e and the 6th oilhole 11g is positioned on another side of valve body 11, and the first oilhole 11b is communicated with the rod chamber of the first oil cylinder I, and the second oilhole 11c is communicated with the rod chamber of the second oil cylinder II; The 3rd oilhole 11d is communicated with the rodless cavity of the first oil cylinder I; The 4th oilhole 11e is communicated with the rodless cavity of the second oil cylinder II, and under high pressure conditions, among two side channel 12c one is communicated with the first oilhole 11b and the 5th oilhole 11f; Among two side channel 12c another is communicated with the second oilhole 11c and the 6th oilhole 11g; Under low-pressure state, among two side channel 12c one is communicated with the 3rd oilhole 11d and the 5th oilhole 11f, and another among two side channel 12c is communicated with the 4th oilhole 11e with the 6th oilhole 11g.
The working procedure of high low pressure conversion equipment of the present invention is described below in conjunction with Fig. 8 and Fig. 9.Shown in Fig. 8 is the schematic representation of high low pressure conversion equipment of the present invention under high pressure conditions, and under high pressure conditions, hydraulic oil is from flowing into high low pressure selector valve 10 from the 5th oilhole 11f; Get into the oilhole first oilhole 11b through one among two side channel 12c then, and from the rodless cavity of the first oilhole 11b, the first oil cylinder I, the piston rod that hydraulic oil promotes the first oil cylinder I moves towards rod chamber; Thereby the hydraulic oil in the rod chamber of the first oil cylinder I is pressed among the 3rd oilhole 11d, and the hydraulic oil in the 3rd oilhole 11d gets into the interior 10a of valve pocket of high low pressure selector valve 10, at this moment; The circular groove 12b of spool 12 1 ends is corresponding with the 3rd oilhole 11d and the 4th oilhole 11e; And the 3rd oilhole 11d and the 4th oilhole 11e all are communicated with valve pocket 11a, and therefore, hydraulic oil flows into valve pocket 11a from the 3rd oilhole 11d; From valve pocket 11a, flow into the 4th oilhole 11e then; And finally getting into the rod chamber of oil cylinder II, the hydraulic oil in the rod chamber promotes piston rod and moves towards rodless cavity, and the hydraulic oil in the rodless cavity is pressed among the second oilhole 11c; And entering valve pocket 11a; Through among two side channel 12c another, the hydraulic oil that flows into from the second oilhole 11c flows into the 6th oilhole 11g, and from the 6th oilhole 11g, flows out high low pressure selector valve 10.
If want to convert high low pressure conversion equipment of the present invention into low-pressure state from high pressure conditions, only need spool 12, the position that this spool 12 is moved among Fig. 9 along the axially position from Fig. 8 of valve pocket 11a gets final product.
Shown in Fig. 9 is the schematic representation of high low pressure conversion equipment of the present invention under low-pressure state.Under low-pressure state, hydraulic oil flows in the high low pressure selector valve 10 from the 5th oilhole 11f, flows into the 3rd oilhole 11d through one among two side channel 12c then; And flowing into the rod chamber of the first oil cylinder I from the opening that the 3rd oilhole 11d links to each other with the first oil cylinder I, the piston rod that hydraulic oil promotes the first oil cylinder I moves towards rodless cavity, thereby the hydraulic oil in the rodless cavity of the first oil cylinder I is pressed among the first oilhole 11b; Hydraulic oil in the first oilhole 11b flows in the valve pocket 11a of high low pressure selector valve valve 10, and at this moment, the circular groove 12b of spool 12 the other ends is corresponding with the first oilhole 11b; And the first oilhole 11b is communicated with valve pocket 11a; Therefore, hydraulic oil flows into valve pocket 11a from the first oilhole 11b, from valve pocket 11a, flows into the second oilhole 11c then; And finally get into the rodless cavity of the second oil cylinder II; Hydraulic oil in the rodless cavity promotes piston rod and moves towards rod chamber, and the hydraulic oil in the rod chamber is pressed into the 4th oilhole 11e, through among two side channel 12c another; The hydraulic oil that flows into from the 4th oilhole 11e flows into the 6th oilhole 11g, and from the 6th oilhole 11g, flows out.
It more than is the process that two six logical high low pressure selector valves 10 are accomplished the high low pressure conversion of high low pressure conversion equipment.
The high low pressure selector valve that adopts in the high low pressure conversion equipment shown in Fig. 1 is a rotary valve, and seal form is mechanical seal, that is, the spool of rotary valve and the valve pocket of valve body must closely cooperate and could realize sealing, thereby has increased the difficulty of processing and assembling greatly.
Because the high low pressure selector valve of using in the high low pressure conversion equipment of the present invention 10 is guiding valve, reaching spool 12 can rotate in valve pocket 11a, therefore, can adopt the form of radial seal that high low pressure selector valve 10 is sealed.That is, high low pressure selector valve 10 also comprises a plurality of seal rings 13, and the body 12a of spool 12 is provided with a plurality of seal groove 12d, and these a plurality of seal groove 12d are between circular groove 12b and side channel 12c, and a plurality of seal rings 13 are separately positioned among a plurality of seal groove 12d.
Usually, seal ring 13 can be the O type circle of being processed by the rubber-like material.And the summary external diameter of this O type circle is greater than the diameter of valve pocket 11a, thereby when being arranged on spool 12 among the valve pocket 11a, seal ring 13 deforms, thereby can between spool 12 and valve pocket 11a, form sealing, prevents the hydraulic oil leakage.
In order to prevent in the process that spool 12 slides oilhole and the sharp edge that passes through the place mutually of the valve pocket 11a seal ring 13 that weares and teares; Preferably; Among the first oilhole 11b of valve body 11, the second oilhole 11c, the 3rd oilhole 11d, the 4th oilhole 11e, the 5th oilhole 11f and the 6th oilhole 11g at least one can be provided with according to following mode: this first oilhole 11b comprises blind hole 110b and a plurality of aperture 111b; A plurality of aperture 111b are arranged on the bottom of blind hole 110b, and this blind hole 110b is communicated with valve pocket 11a.
The aperture of aperture 111b is much all little with respect to the aperture of the aperture of blind hole 110b and valve pocket 11a; Therefore; The intersecting line of each aperture and valve pocket 11a is all very short, thereby the sharp edge that passes through the place mutually is also shorter, therefore in the time of can reducing spool 12 and in valve pocket 11a, slide to the wearing and tearing of seal ring 13.
Preferably, the aperture of aperture can be less than the width of seal ring 13.When seal ring 13 on spool 12, when moving to the aperture place, can an aperture be sealed fully with this spool 12, further prevented the wearing and tearing of seal ring 13 at the aperture place.
Usually, the first oilhole 11b, the 3rd oilhole 11d and the 5th oilhole 11f and the second oilhole 11c, the 4th oilhole 11e and the 6th oilhole 11g are about the central axis symmetry of valve pocket 11a, and two side channel 12c of spool 12 are about the central axis symmetry of body 12a.
Shown in Fig. 3 to Fig. 6; Rotate when preventing that spool 12 from sliding in valve pocket 11a; Preferably; The body 12a of spool 12 is provided with at least one ridge 12e, is formed with the chute 11h that matches with ridge 12e on the inwall of the valve pocket 11a of valve body 11, and at least one ridge 12e is on the part between two side channel 12c.
In addition, the machining accuracy of ridge 12e and chute 11e is easy to control, therefore, through control ridge 12e and the machining accuracy of chute 11e and the sealing that quality of fit can also be realized side channel 12c are set, prevents hydraulic fluid leak.
For the ease of the processing of ridge 12e and chute, and spool 12 is slided equably in valve pocket, preferably, ridge 12e is two, and these two ridge 12e are about the center longitudinal axis symmetry of side channel 12c.The center longitudinal axis of side channel 12c is meant along the symmetry axis of the longitudinal direction of side channel 12c.
Preferably, high low pressure conversion equipment of the present invention can also comprise the spool moving assembly, this spool moving assembly can along valve pocket 11a move axially spool 12, to realize the conversion of high low pressure.
In high low pressure conversion equipment of the present invention, said spool moving assembly generally can be controlled through manual and hydraulic control dual mode, to realize the conversion of high low pressure.
When using manual mode to realize the conversion of high low pressure conversion equipment of the present invention; As shown in Figure 10; Said spool moving assembly comprises the first blind flange 14a, the second blind flange 14b, driving member 14c and bias piece 14d; The first blind flange 14a and the second blind flange 14b are separately fixed on two sides that connected by valve pocket 11a of valve body 11, and with valve pocket 11a sealing, driving member 14c can penetrate the first blind flange 14a and promote spool 12 moving axially along valve pocket 11a; Bias piece 14d is arranged between the spool 11a and the second blind flange 14b in the cavity, with bias voltage spool 12.
In the time need converting the low-pressure state shown in Figure 10 into high pressure conditions; Handle driving member 14c; Making this driving member 14c promote the left side of spool 12 in Figure 10 moves; And compress the bias piece 14d in the cavity that is arranged between the second blind flange 14b and the valve pocket 11a,, spool 12 stops to handle driving member 14c when moving to the pairing position of high pressure conditions.
When converting high pressure conditions into low-pressure state, only need to handle driving member 14c and move right, at this moment, the bias piece 14d that is in compressive state moves the right side of bias voltage spool 12 in Figure 10, when spool 12 moves to locations of low pressure, stops to handle driving member 14c.The advantage of this method is, and is simple in structure, is easy to realize.
Preferably, driving member 14c can be bolt, and bias piece 14d can be spring.Bolt and spring easy operating, and cost is lower.
When the mode of use hydraulic control realizes the high low pressure conversion of high low pressure conversion equipment of the present invention; As shown in Figure 11; This high low pressure conversion equipment also comprises the spool moving assembly; This spool moving assembly comprises the first blind flange 14a and the second blind flange 14b, and the first blind flange 14a and the second blind flange 14b are separately fixed on two sides that connected by valve pocket 11a of valve body 11, and valve pocket 11a is sealed; The first blind flange 14a is provided with the first hydraulic control oilhole 141a that communicates with valve pocket 11a, and the second blind flange 14b is provided with the second hydraulic control oilhole 141b that communicates with valve pocket 11a.
When with high low pressure conversion equipment of the present invention when the low-pressure state described in Figure 11 converts high pressure conditions into; In valve pocket 11a, feed hydraulic oil from the first hydraulic control oilhole 141a; Hydraulic oil promotes spool 12 and moves to the left side shown in Figure 11, till spool 12 moves to locations of high pressure.When with the high low pressure conversion equipment when high pressure conditions converts low-pressure state into, in the second hydraulic control oilhole 141b phase valve pocket 11a, feed hydraulic oil, hydraulic pressure has the spool 12 of promotion to move to the right side shown in Figure 11, moves to the locations of low pressure position until spool 12.
When the mode of using hydraulic control realizes the high low pressure conversion of high low pressure conversion equipment of the present invention; This high low pressure conversion equipment can also comprise hydraulic control system; This hydraulic control system comprises control valve 20, oil pump 30 and the fuel tank 40 of fluid connection; The first hydraulic control oilhole 141a and the second hydraulic control oilhole 141b are connected to fuel tank 40 through control valve 20, and control valve 20 is used for controlling the flow direction of said hydraulic control system hydraulic oil.Through control valve 20 hydraulic oil is flowed towards different directions, and the position of the spool 12 of control high low pressure selector valve 10.
For example, can oil-feed from the first hydraulic control oilhole 141a through adjustment control valve 20, through the second hydraulic control oilhole 141b oil return, be moved to the left thereby promote spool 12, make the high low pressure reversing arrangement convert high pressure conditions into from low-pressure state.In like manner, can also oil-feed from the second hydraulic control oilhole 141b through adjustment control valve 20, oil return from the first control oilhole 141a promotes spool 12 and moves right, and makes the high low pressure reversing arrangement convert low-pressure state into from high pressure conditions.Hydraulic control realizes that the advantage of high low pressure conversion is, has realized the automation of high low pressure control, save manpower, and control accurately.
As another aspect of the present invention, a kind of pumping system also is provided, this pumping system comprises the high low pressure conversion equipment, it is characterized in that, this high low pressure conversion equipment is an above-mentioned high low pressure conversion equipment provided by the present invention.Pumping system provided by the present invention can be changed between high pressure conditions and low-pressure state easily.
, can realize in the high low pressure conversion equipment said spool moving assembly that the convenience that high pressure conditions and low-pressure state switch has also improved the reliability of changing mutually between high pressure conditions and the low-pressure state simultaneously through being set.
Have the spool of circular groove and side channel through setting, can simplify the manufacturing of high low pressure selector valve, and spool can slide in valve pocket, make it possible on spool, be provided with seal ring, thereby improve the sealability of high low pressure selector valve.
More than combine accompanying drawing to describe preferred implementation of the present invention in detail; But; The present invention is not limited to the detail in the above-mentioned mode of execution; In technical conceive scope of the present invention, can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove that in addition each the concrete technical characteristics described in above-mentioned embodiment under reconcilable situation, can make up through any suitable manner.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between the various mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be regarded as the disclosed content of the present invention equally.
Claims (14)
1. high low pressure conversion equipment; This high low pressure conversion equipment comprises high low pressure selector valve (10), first oil cylinder (I) and second oil cylinder (II); Said high low pressure selector valve (10) comprises the valve body (11) of the valve pocket (11a) with perforation and is arranged on the spool (12) in the said valve pocket (11a); It is characterized in that; Said spool (12) comprises body (12a), and this body (12a) is provided with two circular grooves (12b) and two side channels (12c), and these two side channels (12c) are provided with along the circumferential interval of said body (12a); Said spool (12) can be in said valve pocket (11a) axially slides into another position from a position along this valve pocket (11a); Thereby said high low pressure conversion equipment is in respectively under high pressure conditions and the low-pressure state, under high pressure conditions, a rod chamber connection in said two circular grooves (12b) with the rod chamber and said second oil cylinder (II) of said first oil cylinder (I); Under low-pressure state, another in said two circular grooves (12b) is communicated with the rodless cavity of said first oil cylinder (I) and the rodless cavity of said second oil cylinder (II).
2. high low pressure conversion equipment according to claim 1 is characterized in that, said two side channels (12c) are positioned between said two circular grooves (12b).
3. high low pressure conversion equipment according to claim 2; It is characterized in that; Said valve body (11) also comprises first oilhole (11b), second oilhole (11c), the 3rd oilhole (11d), the 4th oilhole (11e), the 5th oilhole (11f) and the 6th oilhole (11g); This first oilhole (11b), second oilhole (11c), the 3rd oilhole (11d), the 4th oilhole (11e), the 5th oilhole (11f) and the 6th oilhole (11g) all connect with said valve pocket (11a); And the opening of said first oilhole (11b), said the 3rd oilhole (11d) and said the 5th oilhole (11f) is positioned on the side of said valve body (11); The opening of said second oilhole (11c), the 4th oilhole (11e) and said the 6th oilhole (11g) is positioned on another side of said valve body (11); Said first oilhole (11b) is communicated with the rod chamber of said first oil cylinder (I); Said second oilhole (11c) is communicated with the rod chamber of said second oil cylinder (II), and said the 3rd oilhole (11d) is communicated with the rodless cavity of said first oil cylinder (I), and said the 4th oilhole (11e) is communicated with the rodless cavity of said second oil cylinder (II); Under high pressure conditions; In said two side channels (12c) one is communicated with said first oilhole (11b) and said the 5th oilhole (11f), and another in said two side channels (12c) will said second oilhole (11c) and said the 6th oilhole (11g) connection, under low-pressure state; In said two side channels (12c) one is communicated with said the 3rd oilhole (11d) and said the 5th oilhole (11f), and another in said two side channels (12c) is communicated with said the 4th oilhole (11e) with said the 6th oilhole (11g).
4. high low pressure conversion equipment according to claim 3; It is characterized in that; Said high low pressure changing valve (10) also comprises a plurality of seal rings (13); The said body (12a) of said spool (12) is provided with a plurality of seal grooves (12d), and these a plurality of seal grooves (12d) are positioned between said circular groove (12b) and the said side channel (12c), and said a plurality of seal rings (13) are separately positioned in said a plurality of seal groove (12d).
5. high low pressure conversion equipment according to claim 4; It is characterized in that; In said first oilhole (11b) of said valve body (11), said second oilhole (11c), said the 3rd oilhole (11d), said the 4th oilhole (11e), said the 5th oilhole (11f) and said the 6th oilhole (11g) at least one comprises blind hole (110b) and aperture (111b); This aperture (111b) is arranged on the bottom of said blind hole (110b), and this blind hole (110b) is communicated with said valve pocket (11a).
6. high low pressure conversion equipment according to claim 5 is characterized in that, the aperture of said aperture (111b) is less than the width of said seal ring (13).
7. high low pressure conversion equipment according to claim 1; It is characterized in that; Said first oilhole (11b), said the 3rd oilhole (11d) and said the 5th oilhole (11f) and said second oilhole (11c), the 4th oilhole (11e) and said the 6th oilhole (11g) the central axis symmetry about said valve pocket (11a), said two side channels (12c) of said spool (12) are about the central axis symmetry of said body (12a).
8. high low pressure conversion equipment according to claim 1; It is characterized in that; The said body (12a) of said spool (12) is provided with at least one ridge (12e); Be formed with the chute (11h) that matches with said ridge (12e) on the inwall of the said valve pocket (11a) of said valve body (11), said at least one ridge (12e) is positioned on the part between two said side channels (12c).
9. high low pressure conversion equipment according to claim 8 is characterized in that, said ridge (12e) is two, and these two ridges (12e) are about the center longitudinal axis symmetry of said side channel (12c).
10. according to any described high low pressure conversion equipment in the claim 1 to 9, it is characterized in that this high low pressure conversion equipment also comprises the spool moving assembly, what this spool moving assembly can be along said valve pocket (11a) moves axially said spool (12).
11. high low pressure converter device according to claim 10; It is characterized in that; Said spool moving assembly comprises first blind flange (14a), second blind flange (14b), driving member (14c) and bias piece (14d); Said first blind flange (14a) and said second blind flange (14b) are separately fixed on two sides that connected by said valve pocket (11a) of said valve body (11); And said valve pocket (11a) sealed; Said driving member (14c) can penetrate said first blind flange (14a) and promote said spool (12) along said valve pocket the moving axially of (11a), and said bias piece (14d) is arranged between said spool (12) and said second blind flange (14b) in the cavity, with the said spool of bias voltage (12).
12. high low pressure conversion equipment according to claim 10; It is characterized in that; Said spool moving assembly comprises first blind flange (14a) and second blind flange (14b); Said first blind flange (14a) and said second blind flange (14b) are separately fixed on two sides that connected by said valve pocket (11a) of said valve body (11); And with said valve pocket (11a) sealing, said first blind flange (14a) is provided with the first hydraulic control oilhole (141a) that communicates with said valve pocket (11a), and said second blind flange (14b) is provided with the second hydraulic control oilhole (141b) that communicates with said valve pocket (11a).
13. high low pressure conversion equipment according to claim 12; It is characterized in that; This high low pressure conversion equipment also comprises hydraulic control system; This hydraulic control system comprises control valve (20), oil pump (30) and the fuel tank (40) of fluid connection, and said first hydraulic control oilhole (141a) and the said second hydraulic control oilhole (141b) are connected to said fuel tank (40) through said control valve (20), and said control valve (20) is used for controlling the flow direction of said hydraulic control system hydraulic oil.
14. a pumping system, this pumping system comprises the high low pressure conversion equipment, it is characterized in that, this high low pressure conversion equipment is any described high low pressure conversion equipment in the claim 1 to 13.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110338335 CN102374310B (en) | 2011-10-31 | 2011-10-31 | High-low pressure conversion device and pumping system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110338335 CN102374310B (en) | 2011-10-31 | 2011-10-31 | High-low pressure conversion device and pumping system |
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| Publication Number | Publication Date |
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| CN102374310A true CN102374310A (en) | 2012-03-14 |
| CN102374310B CN102374310B (en) | 2013-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110338335 Active CN102374310B (en) | 2011-10-31 | 2011-10-31 | High-low pressure conversion device and pumping system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102720670A (en) * | 2012-07-10 | 2012-10-10 | 三一重工股份有限公司 | Hydraulic valve, concrete pumping system and concrete pump |
| CN102734254A (en) * | 2012-07-13 | 2012-10-17 | 三一重工股份有限公司 | Parallel oil cylinder and engineering machinery |
| CN107932142A (en) * | 2017-12-25 | 2018-04-20 | 苏州石川制铁有限公司 | Machine tool oil pressure system high-low pressure automatic transfer equipment |
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| CN102720670B (en) * | 2012-07-10 | 2014-12-10 | 三一汽车制造有限公司 | Hydraulic valve, concrete pumping system and concrete pump |
| CN102734254A (en) * | 2012-07-13 | 2012-10-17 | 三一重工股份有限公司 | Parallel oil cylinder and engineering machinery |
| CN102734254B (en) * | 2012-07-13 | 2015-12-02 | 三一汽车制造有限公司 | Parallel oil cylinder and engineering machinery |
| CN107932142A (en) * | 2017-12-25 | 2018-04-20 | 苏州石川制铁有限公司 | Machine tool oil pressure system high-low pressure automatic transfer equipment |
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|---|---|
| CN102374310B (en) | 2013-01-23 |
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