CN102678540A - Hydraulic oil cylinder, hydraulic oil circuit, material pumping system, and engineering machinery - Google Patents
Hydraulic oil cylinder, hydraulic oil circuit, material pumping system, and engineering machinery Download PDFInfo
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- CN102678540A CN102678540A CN2012101736367A CN201210173636A CN102678540A CN 102678540 A CN102678540 A CN 102678540A CN 2012101736367 A CN2012101736367 A CN 2012101736367A CN 201210173636 A CN201210173636 A CN 201210173636A CN 102678540 A CN102678540 A CN 102678540A
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Abstract
The invention provides a hydraulic oil cylinder used for a material pumping system. The hydraulic oil cylinder comprises a cylinder barrel, a piston and a piston rod installed in the cylinder barrel; two ends of the cylinder barrel are sealed by a first end cover and a second end cover; one end of the piston rod is arranged on the piston while the other end of the piston rod passes through the first end cover; the inner part of the cylinder barrel is divided into a first cavity and a second cavity by the piston; the invention also comprises a limit piston and a limit piston fixing rod, wherein one end of the piston rod is provided with a blind hole in which the limit piston fixing rod can be inserted; the limit piston can reciprocate on the limit piston fixing rod. The invention also provides a hydraulic oil circuit, a material pumping system and an engineering machinery. According to the technical scheme of the invention, the length of the hydraulic oil cylinder is effectively shortened, the installation space of the pumping system is reduced, the manufacture of the hydraulic oil cylinder and connection of oil pipes are facilitated, the concrete pistons are more convenient and faster to clean and replace, and the continuity of the cement pumping work and the production efficiency are enhanced remarkably.
Description
Technical field
The present invention relates to engineering machinery field, more specifically, relate to a kind of hydraulic jack, contain this hydraulic jack hydraulic circuit, contain the material pumping system and the engineering machinery of this hydraulic circuit.
Background technique
In concrete conveying equipment; The concrete piston is an easily damaged parts, often needs to change, but carries in the cylinder owing to concrete piston when normal state (working state) is in fully; When needs are changed, just can dismantle, change or safeguard after must from carry cylinder, being retracted in the water tank concrete piston.
As shown in Figure 1, at present, typical structure is that concrete piston 2 is connected on the piston rod 5 through middle extension bar 20.When needs dismountings concrete piston 2, at first middle extension bar 20 is pulled down, crawl operated piston bar 5 advances then, makes piston rod 5 near concrete piston 2, again with piston rod 5 directly and concrete piston 2 be linked together, as shown in Figure 2; Crawl operated piston bar 5 is retreated then, and concrete piston 2 is retracted in the water tank 3, and is as shown in Figure 3; Install by above-mentioned anti-process again after having torn open, operation is inconvenience very, needs the time long.
In a kind of in addition relevant pumping mechanism; As shown in Figure 4, concrete piston 2 directly connects with piston rod 5 through cutting ferrule 40, with the length lengthening of cylinder barrel 4; The tail end of cylinder barrel 4 connects locating oil cylinder 30; Spacing piston 31 is arranged in the locating oil cylinder 30, and locating oil cylinder 30 connects selector valve, connects pressure oil-source by selector valve through one-way valve.Owing to saved middle extension bar, when needs are changed or clean concrete piston 2, concrete piston 2 directly is retracted in the water tank 3, as shown in Figure 5; Concrete piston 2 is changed or cleaned, convenient, fast, less to the influence of concrete pumping construction, improved efficiency of construction.
But this structure makes the length of whole hydraulic jack and weight increase owing to increased an auxiliary cylinder at the cylinder barrel afterbody, thereby makes that requisite space becomes big and increased complete machine weight when installing; Simultaneously, manufacture cost is also than higher, complex manufacturing technology.
Therefore, guaranteeing to realize that the concrete piston withdraws from the basis of carrying cylinder efficiently, provide a kind of structure more compact, the littler hydraulic jack that takes up room becomes those skilled in the art's problem demanding prompt solution.
Summary of the invention
In order to solve existing moving back in the concrete piston technology, the hydraulic jack size is long, and the big problem that takes up room the invention provides a kind of new type hydraulic oil cylinder.
The invention provides a kind of hydraulic jack; Be used for the material pumping system, it comprises cylinder barrel, is installed on piston and piston rod in the said cylinder barrel, and the two ends of cylinder barrel are respectively through first end cap and second end bracket enclosed; One end of piston rod is installed on the piston; The other end passes first end cap, and piston is divided into first chamber and second chamber with cylinder barrel inside, also comprises: the spacing piston and the spacing piston fixing rod that are positioned at second chamber; The end that piston rod is fixedly connected with said piston has axial blind hole; One end of said spacing piston fixing rod can insert said axial blind hole, and the other end is fixed on said second end cap, and said spacing piston sleeve is located at also can be along the to-and-fro motion of said spacing piston fixing rod on the said spacing piston fixing rod; Be located at the casing wall on spacing piston right side or first hydraulic fluid port on second end cap; Be located at first end cap or near second hydraulic fluid port on the casing wall of first end cap; The 3rd hydraulic fluid port that is communicated with cavity between the said piston with said spacing piston.
Technological scheme provided by the invention makes the shared cylinder body of spacing piston and master cylinder and spacing piston and the overlapping LAP of main oil cylinder piston; Reduced the structure length of master cylinder significantly, both saved the installing space of oil cylinder, made it more adapt to relative narrow space; Offer convenience for the design of complete machine, reduced the production consumptive material again, reduce production costs; Also reduced oil cylinder weight; Offer convenience for the weight of machine product reduces, can effectively reduce the operation cost of machine product, this has very positive meaning for the energy-saving and emission-reduction consumption reduction.
Further, the end that matches with said piston rod of said spacing piston fixing rod is provided with limiting stopper.Like this, can guarantee the spacing piston spacing piston fixing rod of can not scurrying out.
Preferably, the length of said spacing piston fixing rod equals the centre distance between said first hydraulic fluid port and said the 3rd hydraulic fluid port.
Preferably, said the 3rd hydraulic fluid port is located on the barrel of said cylinder barrel.This structure is easy to process, directly can accomplish in the barrel upper shed, and difficulty of processing is low, and manufacturing efficiency is high.
Preferably, said the 3rd hydraulic fluid port is to be located at said spacing piston fixing rod inside along its axial through hole.
This structural design is ingenious, avoids the radial opening at end cap, guarantees the neat of hydraulic jack profile, reasonably utilizes the structure of spacing piston fixing rod, has reduced the weight of spacing piston fixing rod and pumping system simultaneously.
On the other hand; The present invention also provides a kind of hydraulic circuit; Comprise the hydraulic jack in the technique scheme, said second hydraulic fluid port and the 3rd hydraulic fluid port are connected to the fuel tank or first oil hydraulic pump through the 3rd selector valve respectively, and said first hydraulic fluid port is connected to the fuel tank or second oil hydraulic pump through first selector valve.
This hydraulic circuit can drive the checking maintenance operation of the normal pumpdown of hydraulic jack and concrete piston in the such scheme, guarantees the proper functioning of material pumping system.
In a kind of embodiment of this hydraulic circuit, said first hydraulic fluid port is located at said second end cap radially.This structure can reduce the difficulty of processing of first hydraulic fluid port, is convenient to processing, can enhance productivity.
In above-mentioned any hydraulic circuit, further, also comprise second selector valve and damping piece, said the 3rd hydraulic fluid port is connected to said the 3rd selector valve or said damping piece through second selector valve, and said damping piece is communicated with fuel tank.Damping piece can play certain damping function in the process of moving back the concrete piston rod, reduce the piston rod opening speed, reduces impact or the wearing and tearing of piston near Sealing spacing piston and the 3rd hydraulic fluid port, prolongs the working life of material pumping system.
Moreover; The present invention also provides a kind of material pumping system; Comprise and carry cylinder, intermediate member and be located at the concrete piston in the said conveying cylinder; It also comprises above-mentioned hydraulic circuit, and said intermediate member is located between said conveying cylinder and the said hydraulic jack, and said concrete piston is connected with the piston rod of said hydraulic jack through connecting rod; At the pumping state, said hydraulic jack is used to drive said concrete piston, so that the pumping material; At maintenance state, said hydraulic jack is used to order about said concrete piston and withdraws from said conveying cylinder.
In addition, the present invention also provides a kind of engineering machinery, comprises above-mentioned material pumping system.
Technological scheme provided by the invention has following beneficial effect:
Make the shared cylinder body of spacing piston and master cylinder; The overlapping LAP of spacing piston and main oil cylinder piston; Reduced the structure length of master cylinder significantly, saved the installing space of oil cylinder, made it more adapt to relative narrow space; Offer convenience for the design of complete machine, make the material pumping can do compactly more; The structure length of master cylinder reduces, and has also reduced the production consumptive material, reduces production costs; Simultaneously, also reduced oil cylinder weight, offered convenience, can effectively reduce the operation cost of machine product, had very positive meaning for the energy-saving and emission-reduction consumption reduction for the weight of material pumping system and pump truck reduces; This structure can be accomplished the cleaning and the replacing of concrete piston quickly and easily, reduces working strength of workers, significantly improves the efficient that the concrete piston cleans and changes, and boosts productivity.
Description of drawings
Fig. 1 is the schematic representation of a kind of hydraulic jack in the correlation technique;
Fig. 2 is the schematic representation behind the extension bar in the middle of dismantling in the structure shown in Figure 1;
Fig. 3 is that the concrete piston is retracted into the schematic representation in the water tank in the structure shown in Figure 2;
Fig. 4 is the schematic representation of another kind of hydraulic jack in the correlation technique;
Fig. 5 is that the concrete piston is retracted into the schematic representation in the water tank in the structure shown in Figure 4;
Fig. 6 is the structural representation according to hydraulic jack one embodiment according to the invention;
Fig. 7 is that the concrete piston is retracted into the schematic representation in the water tank in the structure shown in Figure 6;
Fig. 8 is the structural representation according to the another embodiment of hydraulic jack according to the invention;
Fig. 9 is the comparison diagram of hydraulic jack one embodiment according to the invention and related fluid compressing cylinder.
Wherein, the corresponding relation between reference character and the component names is among Fig. 1 to Fig. 9:
100 indirect rod-type hydraulic jacks, 200 locating oil cylinder formula hydraulic jacks
300 hydraulic jacks
1 carries cylinder 2 concrete pistons 3 water tanks 4 cylinder barrels
5 piston rods, 51 blind holes, 6 pistons
71 first end caps, 72 second end caps, 8 spacing pistons
9 spacing piston fixing rods
91 through holes, 92 limiting stoppers, 16 damping pieces
10 the 3rd hydraulic fluid ports, 11 second hydraulic fluid ports, 12 first hydraulic fluid ports
131 first selector valves, 132 first one-way valves
133 second selector valves 134 the 3rd selector valve, 135 second one-way valves
Extension bar 30 spacing oily 31 spacing pistons in the middle of 20
32 spacing piston rod 40 cutting ferrules 50 fuel tanks
61 first oil hydraulic pumps, 62 second oil hydraulic pumps
Embodiment
In order to make those skilled in the art understand technological scheme of the present invention better, the present invention is done further detailed description below in conjunction with accompanying drawing and specific embodiment.Need to prove that under the situation of not conflicting, the application's embodiment and the characteristic among the embodiment can make up each other.
Like Fig. 6 and shown in Figure 7; The embodiment of the invention provides a kind of hydraulic oil 300, comprises cylinder barrel 4, is installed on piston 6 and piston rod 5 in the said cylinder barrel 4, and the two ends of cylinder barrel 4 are respectively through first end cap 71 and 72 sealings of second end cap; One end of piston rod 5 is installed on the piston 6; The other end passes first end cap 71, and piston 6 is divided into first chamber and second chamber with cylinder barrel 4 inside, also comprises the spacing piston 8 and spacing piston fixing rod 9 that are positioned at second chamber; Said piston rod 5 has axial blind hole 51 with the end that said piston 6 is fixedly connected; One end of said spacing piston fixing rod 9 can insert said axial blind hole 51, and the other end is fixed on said second end cap 72, and said spacing piston 8 is sheathed on also can be along said spacing piston fixing rod 9 to-and-fro motion on the said spacing piston fixing rod 9;
Be located at the casing wall on spacing piston 8 right sides or first hydraulic fluid port 12 on second end cap 72;
Be located at first end cap 71 or near second hydraulic fluid port 11 on the casing wall of first end cap 71;
The 3rd hydraulic fluid port 10 that is communicated with cavity between said spacing piston 8 and the said piston 6.
Technological scheme provided by the invention for indirect rod-type hydraulic jack 100, has been saved middle extension bar 20; Concrete piston 2 is directly connected with piston rod 5 through cutting ferrule 40; This has just saved the mounting-dismounting programme of middle extension bar 20, has reduced the repeated disassembled and assembled of piston rod 5 with concrete piston 2 simultaneously, and is easy to operate; Practice thrift the dismounting time, improve the efficient of changing and cleaning.
Simultaneously, under the situation of identical piston stroke, this oil cylinder is spacing with spacing piston 8; Spacing piston 8 and piston 6 shared cylinder bodies, and overlapping LAP, this is with respect to hydraulic jack shown in Figure 4; Shorten length dimension greatly, on the one hand, reduced hydraulic jack occupied space on pumping equipment; Make hydraulic jack adapt to relative narrow space more, offer convenience, reduced and produced hydraulic jack and the required consumptive material of pumping system to the design of pumping system and engineering machinery complete machine; Reduce production costs, also reduced the weight of hydraulic jack simultaneously, it is lighter to make that material pumping system and engineering machinery complete machine can design; Effectively reduce the operation cost of material pumping system, have positive meaning for the energy-saving and emission-reduction in the engineering construction.
As shown in Figure 6, during said hydraulic jack proper functioning, said spacing piston 8 is positioned at the end that said spacing piston fixing rod 9 cooperates with said piston rod 5, keeps the distance of setting between said spacing piston 8 and the said end cap 7.
Said spacing piston fixing rod 9 is provided with limiting stopper 92 with the end that said piston rod 5 cooperates.Limiting stopper 92 can prevent the spacing piston 8 spacing piston fixing rod 9 of scurrying out, and avoids so the spacing inefficacy that causes takes place, and the present technique scheme has guaranteed the normal operation of hydraulic jack.
Like Fig. 6, Fig. 7 and shown in Figure 9, in a kind of specific embodiment of the present invention, said the 3rd hydraulic fluid port 10 is located on the barrel of said cylinder barrel 4.This structure is easy to process, directly can accomplish in the barrel upper shed, and difficulty of processing is low, and manufacturing efficiency is high.
At first state, the 3rd hydraulic fluid port 10 is between piston 6 and spacing piston 8, and at second state, the 3rd hydraulic fluid port 10 is positioned at piston 6 left sides.
In another kind of embodiment of the present invention, as shown in Figure 8, said the 3rd hydraulic fluid port 10 is for to be located at said spacing piston fixing rod 9 inside along its axial through hole 91.
This through hole can or be derived the chamber between spacing piston 8 and the piston 6 with the hydraulic oil injection, realizes the proper functioning of hydraulic jack.
Like this, can utilize the hollow structure of spacing piston fixing rod 9,, reduce quantity, further improve the structural strength of cylinder barrel 4 in cylinder barrel 4 upper sheds as the filler opening of cylinder barrel 4 rodless cavities.
In addition; The present invention also provides a kind of hydraulic circuit; Comprise the hydraulic jack described in the foregoing description; Said second hydraulic fluid port 11 and the 3rd hydraulic fluid port 10 are connected to the fuel tank 50 or first oil hydraulic pump 61 through the 3rd selector valve 134 respectively, and said first hydraulic fluid port 12 is connected to the fuel tank or second oil hydraulic pump 62 through first selector valve 131.
This hydraulic circuit can drive the checking maintenance operation of the normal pumpdown of hydraulic jack and concrete piston in the such scheme, guarantees the proper functioning of material pumping system.
A kind of embodiment of this hydraulic circuit is that said first hydraulic fluid port 12 is located at said second end cap 72 radially.This structure can reduce the difficulty of processing of first hydraulic fluid port, is convenient to processing, can enhance productivity.
Further, the described hydraulic circuit of present embodiment also comprises:
Like Fig. 6, Fig. 7 and shown in Figure 9, when moving back the concrete piston, said the 3rd hydraulic fluid port 10 emptyings, said second selector valve 133 can make hydraulic oil through said the 3rd hydraulic fluid port 10 and said damping piece 16 oil sump tanks.Damping piece can play certain damping function in the process of moving back the concrete piston, reduce the speed that piston rod is return, and reduces impact and the wearing and tearing of piston near Sealing spacing piston and the 3rd hydraulic fluid port 10, prolongs the working life of material pumping system.
Moreover the present invention also provides a kind of material pumping system, comprise carrying cylinder 1, intermediate member and being located at the concrete piston 2 in the said conveying cylinder,
This material pumping system also comprises the hydraulic circuit in the foregoing description, and said intermediate member is located between said conveying cylinder 1 and the said hydraulic jack, and said concrete piston is connected with the piston rod of said hydraulic jack through connecting rod;
At the pumping state, said hydraulic jack is used to drive said concrete piston, so that the pumping material;
At maintenance state, said hydraulic jack is used to order about said concrete piston and withdraws from said conveying cylinder.
In the present embodiment, preferably, said intermediate member is a water tank 3.
State shown in Figure 6 carries out the structural representation of pumpdown for this material pumping system; At this moment; Spacing piston 8 is positioned at the high order end of spacing piston fixing rod 9; And be held in limiting stopper 92, and the hydraulic oil in the cavity between spacing piston 8 and said second end cap 72 carries out pressurize, and spacing piston 8 keeps shown position; Piston 6 carries out pumpdown under the effect of the 3rd hydraulic fluid port 10 and second hydraulic fluid port 11.
The pumping principle; I.e. first state: the 3rd selector valve 134 controls first oil hydraulic pump 61 is connected to the 3rd hydraulic fluid port 10 through second one-way valve 135; Cavity between piston 6 and the spacing piston 8 (second chamber) oiling; Piston 6 drive piston rods 5 are moved to the left and carry out pumpdown, and second hydraulic fluid port 11 is switched to fuel tank 50 simultaneously; After pumping is accomplished; 134 switching-overs of the 3rd selector valve; First oil hydraulic pump 61 is connected through second one-way valve 135 and second hydraulic fluid port 11; Cavity between second hydraulic fluid port 11 and the piston 6 (first chamber) oiling, the hydraulic oil between piston 6 and the spacing piston 8 is through the 3rd hydraulic fluid port 10, the 3rd selector valve 134 back oil sump tanks.
Further, said second end cap 72 is provided with first hydraulic fluid port, 12, the first hydraulic fluid ports 12 and is connected to the fuel tank or second oil hydraulic pump 62 through first selector valve 131.
As shown in Figure 7; Second state: when concrete piston 2 needed to change or cleans, first hydraulic fluid port 12 was switched to fuel tank 50 under the effect of first selector valve 131, and the hydraulic oil in the cavity between the spacing piston 8 and second end cap 72 is through first hydraulic fluid port, 12 oil sump tanks 50; Piston 6 continues to retreat; Spacing piston 8 moves to second end cap, 72 places under the holding of piston rod 5, and spacing piston fixing rod 9 inserts in the blind hole 51 of piston rod 5, is retracted in the water tank 3 until concrete piston 2; Can like a cork concrete piston 2 and piston rod 5 be disassembled, accomplish the operation of cleaning or changing the concrete piston.
Said spacing piston fixing rod 9 length of the said blind hole 51 on the said piston rod 5 stroke when being not less than said piston rod 5 and driving said concrete piston 2 and be retracted in the said water tank 3 fully that can submerge.
The working principle of product pump according to the invention system is following:
In the present technique scheme, removed the middle extension bar 20 in the conventional concrete piston pumping mechanism, concrete piston 2 has directly been connected with piston rod 5, with the stroke of cylinder barrel 4 lengthening, spacing with spacing piston 8.
Spacing piston 8 and cylinder barrel 4 shared cylinder bodies, and overlapping LAP.Spacing piston fixing rod 9 travel limit that wherein spacing piston 8 utilizes cylinder barrel 4 afterbodys to install.Wherein running length is that concrete piston 2 is retracted into the stroke that water tank 3 needs.
When the pumping mechanism proper functioning, pressure oil enters into the enclosed cavity between spacing piston 8 right sides and cylinder barrel 4 tail ends through first one-way valve 132 and first selector valve 131, shifts spacing piston 8 onto spacing piston fixing rod 9 left end (see figure 7)s.The stroke limit of 8 pairs of piston rods 5 of spacing piston this moment can't be retracted into concrete piston 2 in the water tank 3.This moment, the pressure oil of cylinder barrel 4 work provided through the 3rd selector valve 134 and second selector valve 133.
Need change and clean the concrete piston when pumping mechanism, operate first selector valve 131 pressure oil in the enclosed cavity between spacing piston 8 right sides and cylinder barrel 4 tail ends is leaked in the fuel tank 50, this moment, spacing piston 8 right sides lacked pressure oil, can't carry out spacing.Operate the 3rd selector valve 134, pressure oil is fed the rod chamber of cylinder barrel 4, promote piston rod 5 withdrawals, wherein the pressure oil of cylinder barrel 4 rodless cavities leaks in the fuel tank through second selector valve 133 and throttle valve (damping piece 16).Can shift spacing piston 8 onto cylinder barrel 4 afterbodys and spacing piston fixing rod 9 right-hand members in the piston rod 5 withdrawal processes, the middle (see figure 7) of cavity (being blind hole 51) that wherein spacing piston fixing rod 9 is built in piston rod 5 this moment.Concrete piston 2 is retracted in the water tank 3 fully this moment, is convenient to change and clean.
Fig. 9 shows the contrast effect of hydraulic jack one embodiment according to the invention and related fluid compressing cylinder; As shown in Figure 9; Hydraulic jack 300 relative and locating oil cylinder formula hydraulic jacks 200 provided by the invention; On length, shorten L, saved the length of locating oil cylinder, shortened the shared space of novel pumping system greatly.
Moreover the present invention also provides a kind of engineering machinery, comprises the material pumping system described in the foregoing description.
Technological scheme provided by the invention has shortened the length of master cylinder in the pumping system, has reduced space required when pumping system is installed; The structure of master cylinder is simpler simultaneously; Reduced the overall weight of material pumping system, further reduced the whole transportation energy consumption of pumping system, the connection of processing and fabricating and oil pipe is all comparatively convenient; Can effectively reduce the processing cost of master cylinder, improve the benefit of enterprise.
In the present invention, term " first ", " second ", " the 3rd " only are used to describe purpose, and can not be interpreted as indication or hint relative importance.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a hydraulic jack is used for the material pumping system, and it comprises cylinder barrel (4), is installed on piston (6) and piston rod (5) in the cylinder barrel (4); The two ends of cylinder barrel (4) are respectively through first end cap (71) and second end cap (72) sealing; One end of piston rod (5) is installed on the piston (6), and the other end passes first end cap (71), and piston (6) is divided into first chamber and second chamber with cylinder barrel (4) inside; It is characterized in that, also comprise:
Be positioned at the spacing piston (8) and the spacing piston fixing rod (9) of second chamber; The end that piston rod (5) is fixedly connected with piston (6) has axial blind hole (51); One end of spacing piston fixing rod (9) can insert axial blind hole (51); The other end is fixed on second end cap (72), and spacing piston (8) is sheathed on spacing piston fixing rod (9) upward also can be along spacing piston fixing rod (9) to-and-fro motion;
Be located at the casing wall on spacing piston (8) right side or first hydraulic fluid port (12) on second end cap (72);
Be located at first end cap (71) or near second hydraulic fluid port (11) on the casing wall of first end cap (71);
The 3rd hydraulic fluid port (10) that is communicated with cavity between said spacing piston (8) and the said piston (6).
2. hydraulic jack according to claim 1 is characterized in that, the end that said spacing piston fixing rod (9) matches with said piston rod (5) is provided with limiting stopper (92).
3. hydraulic jack according to claim 2 is characterized in that, the length of said spacing piston fixing rod (9) equals the centre distance between said first hydraulic fluid port (12) and said the 3rd hydraulic fluid port (10).
4. according to each described hydraulic jack in the claim 1 to 3, it is characterized in that said the 3rd hydraulic fluid port (10) is located on the barrel of said cylinder barrel (4).
5. according to each described hydraulic jack in the claim 1 to 3, it is characterized in that said the 3rd hydraulic fluid port (10) is inner along its axial through hole (91) for being located at said spacing piston fixing rod (9).
6. hydraulic circuit; It is characterized in that; Comprise like each described hydraulic jack in the claim 1 to 5; Said second hydraulic fluid port (11) and the 3rd hydraulic fluid port (10) are connected to fuel tank or first oil hydraulic pump (61) through the 3rd selector valve (134) respectively, and said first hydraulic fluid port (12) is connected to fuel tank or second oil hydraulic pump (62) through first selector valve (131).
7. hydraulic circuit according to claim 6 is characterized in that, said first hydraulic fluid port (12) is located at said second end cap (72) radially.
8. according to claim 6 or 7 described hydraulic circuits; It is characterized in that; Also comprise second selector valve (133) and damping piece (16); Said the 3rd hydraulic fluid port (10) is connected to said the 3rd selector valve (134) or said damping piece (16) through second selector valve (133), and said damping piece (16) is communicated with fuel tank.
9. a material pumping system comprises and carries cylinder (1), intermediate member and be located at the concrete piston (2) in the said conveying cylinder, it is characterized in that:
Comprise that also like each described hydraulic circuit in the claim 6 to 8, said intermediate member is located between said conveying cylinder (1) and the said hydraulic jack, said concrete piston is connected with the piston rod of said hydraulic jack through connecting rod;
At the pumping state, said hydraulic jack is used to drive said concrete piston, so that the pumping material;
At maintenance state, said hydraulic jack is used to order about said concrete piston and withdraws from said conveying cylinder.
10. an engineering machinery is characterized in that, comprises like the described material pumping system of each described hydraulic jack or claim 9 in the claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210173636.7A CN102678540B (en) | 2012-05-30 | 2012-05-30 | Hydraulic oil cylinder, hydraulic oil circuit, material pumping system, and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210173636.7A CN102678540B (en) | 2012-05-30 | 2012-05-30 | Hydraulic oil cylinder, hydraulic oil circuit, material pumping system, and engineering machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102678540A true CN102678540A (en) | 2012-09-19 |
| CN102678540B CN102678540B (en) | 2015-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210173636.7A Expired - Fee Related CN102678540B (en) | 2012-05-30 | 2012-05-30 | Hydraulic oil cylinder, hydraulic oil circuit, material pumping system, and engineering machinery |
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| CN104235009A (en) * | 2014-09-16 | 2014-12-24 | 三一重型能源装备有限公司 | Conveying cylinder piston lubricating system and pump vehicle |
| CN104481963A (en) * | 2014-11-05 | 2015-04-01 | 三一汽车制造有限公司 | Oil cylinder, pumping system and concrete pumping device |
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| CN104235009A (en) * | 2014-09-16 | 2014-12-24 | 三一重型能源装备有限公司 | Conveying cylinder piston lubricating system and pump vehicle |
| CN104235009B (en) * | 2014-09-16 | 2017-03-15 | 三一石油智能装备有限公司 | Piston of conveying cylinder lubricating system and pump truck |
| CN104481963A (en) * | 2014-11-05 | 2015-04-01 | 三一汽车制造有限公司 | Oil cylinder, pumping system and concrete pumping device |
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| CN102678540B (en) | 2015-04-01 |
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