CN101776053A - Concrete pumping structure - Google Patents
Concrete pumping structure Download PDFInfo
- Publication number
- CN101776053A CN101776053A CN 201010125059 CN201010125059A CN101776053A CN 101776053 A CN101776053 A CN 101776053A CN 201010125059 CN201010125059 CN 201010125059 CN 201010125059 A CN201010125059 A CN 201010125059A CN 101776053 A CN101776053 A CN 101776053A
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- Prior art keywords
- piston
- auxiliary cylinder
- cylinder
- piston rod
- concrete
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- 238000005086 pumping Methods 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000003921 oil Substances 0.000 claims description 100
- 239000012530 fluid Substances 0.000 claims description 12
- 239000010720 hydraulic oil Substances 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract 1
- 230000008859 change Effects 0.000 description 9
- 239000002828 fuel tank Substances 0.000 description 7
- 238000009835 boiling Methods 0.000 description 3
- 230000004224 protection Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
- F04B9/103—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber
- F04B9/105—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber reciprocating movement of the pumping member being obtained by a double-acting liquid motor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Actuator (AREA)
Abstract
The invention relates to a concrete pumping structure which comprises a conveying cylinder (1), a water tank (3) and a drive cylinder (4), wherein the conveying cylinder is internally provided with a concrete piston (2), a piston rod (5) of the drive cylinder drives the concrete piston to reciprocate in the conveying cylinder (1) when in pumping, and the water tank is positioned between the conveying cylinder and the drive cylinder (4). The concrete pumping structure is characterized by also comprising a piston withdrawing assisting cylinder (7) which is arranged into the drive cylinder at the tail end of the drive cylinder, and the piston withdrawing assisting cylinder is internally provided with a movable assisting cylinder piston (12) so as to limit the piston rod to carry the concrete piston back the water tank when in working or allow the piston rod to carry the concrete piston back the water tank when the piston is withdrawn. The invention achieves the purpose of easily replacing the concrete piston, and reduces the length of the pumping structure relative to the prior art to enable the structure to be more compact, thereby effectively saving the installation space of the pumping structure and lightening the weight of the pumping structure.
Description
Technical field
The present invention relates to a kind of concrete pumping structure.
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.
At present, pump structure commonly used has two kinds, and first kind is that the concrete piston is connected with the driving oil cylinder piston rod by middle brace rod, and (middle extension bar can pass through screw attachment with being connected of driving oil cylinder piston rod and concrete piston as shown in Figure 1, also can connect, be illustrated as screw attachment) by cutting ferrule.When needs dismounting concrete piston, at first middle brace rod 2 is pulled down, the crawl operation allows driving oil cylinder piston rod 3 advance then, make driving oil cylinder piston rod 3 near concrete piston 1, again with driving oil cylinder piston rod 3 directly and concrete piston 1 be linked together, last crawl operation driving oil cylinder piston rod 3 retreats, and concrete piston 1 is retracted in the water tank.Install by above-mentioned inverse process again after having torn open, it is very inconvenient to operate, and needed time is also very long, and concrete pumping construction and equipment are all had very big influence.
Second kind of typical structure cancelled middle brace rod, and not holding in driving oil cylinder has increased a locating oil cylinder that is used for moving back the concrete piston specially, and as shown in Figure 2, the relative first kind of structure of this kind structure can realize the replacing and the maintenance of concrete piston more easily.Its working principle is: concrete piston 2 is installed in the conveying cylinder 1 and its rear end directly connects with driving oil cylinder piston rod 4 by cutting ferrule 3; stroke lengthening with driving oil cylinder 6; with spacing piston 8 position limitation protections; spacing piston oil-cylinder 9 back cavities are connected with pressure oil-source with selector valve 12 by an one-way valve 11; during proper functioning; pressure oil passes through one-way valve; selector valve enters the back cavity of spacing piston oil-cylinder 9; shift spacing piston 8 onto front end back-up ring 7 places; because the locking of one-way valve 11; hydraulic oil can not be run out of from the back cavity of spacing piston oil-cylinder 9, so spacing piston 8 can not retreat.When driving oil cylinder piston rod 4 is run into spacing piston 8, block, make concrete piston 2 remain on the working position with regard to limited piston 8.When needs are changed or clean concrete piston 2,12 commutations of control selector valve, spacing piston oil-cylinder 9 is communicated with fuel tank 10, hydraulic oil can freely flow out, owing to there has not been the lock function of one-way valve 11, when crawl operation driving oil cylinder piston rod 4 retreats, driving oil cylinder piston rod 4 just can promote spacing piston 8 and retreat into the end always, concrete piston 2 is fallen back in the water tank 5, the case lid of so just can fetching boiling water, to concrete piston 2 directly clean or change finish after, cover tank lid, control selector valve 12 again and be connected with pressure oil-source.Pressure oil enters the back cavity of spacing piston oil-cylinder 9 by one-way valve 11, selector valve 12, shifts spacing piston 8 onto front end back-up ring 7 places again, because the locking of one-way valve 11, hydraulic oil can not be run out of from the back cavity of spacing piston oil-cylinder 9, and spacing piston 8 can not retreat.After driving oil cylinder piston rod 4 is run into spacing piston 8, block, make concrete piston 2 remain on normal operation position again with regard to limited piston 8.
The pump structure of above-mentioned easy replacing concrete piston, owing to increased an auxiliary cylinder and owing to lean the length of that section piston rod 4 of the driving oil cylinder piston rear end of spacing piston 8 at the driving oil cylinder afterbody, make the length and the weight of whole pump structure increase, thereby make that requisite space becomes big and increased complete machine weight when installing.
Summary of the invention
The invention provides a kind of new concrete pumping structure that is easy to change the concrete piston, this concrete pumping structure had both reached the purpose that is easy to change the concrete piston, reduced the length of whole pumping mechanism again with respect to prior art, make total compact more attractive in appearance, and alleviated the weight of whole pump structure.
Purpose according to the present invention realizes by following scheme: a kind of concrete pumping structure, comprise the conveying cylinder, water tank, driving oil cylinder, be provided with the concrete piston in the described conveying cylinder, the piston rod of described driving oil cylinder drives the to-and-fro motion in described conveying cylinder of described concrete piston when pumping is worked, wherein said water tank is between described conveying cylinder and described driving oil cylinder, it is characterized in that: also comprise and move back the piston auxiliary cylinder, the described piston auxiliary cylinder that moves back is among described driving oil cylinder end is built in described driving oil cylinder, be provided with movably auxiliary cylinder piston in the piston auxiliary cylinder described moving back, described auxiliary cylinder piston allows described piston rod that described concrete piston brought back in described water tank to get back to described water tank or oil return at the described concrete piston of work timing system when moving back piston by the oil-feed of an auxiliary cylinders hydraulic fluid port.
By driving oil cylinder terminal built-in one be used to move back the concrete piston move back the piston auxiliary cylinder, make that moving back the piston auxiliary cylinders might take the interior space of existing driving oil cylinder tail end thickening casing wall, saved the length of the attachment portion between driving oil cylinder and the auxiliary cylinder, thereby made that add one moves back the piston auxiliary cylinders and do not make the length of whole pump structure increase a length of moving back the piston auxiliary cylinders.Therefore, make the length increasing amount of whole pump structure significantly reduce with respect to prior art.
According to the further improvement of the present invention scheme, the rear end of described driving oil cylinder piston rod offers perforate; Described perforate is designed to and the described piston auxiliary cylinder that moves back can be contained in wherein; The rear end of described driving oil cylinder piston rod offers perforate; Described perforate is designed to and the described piston auxiliary cylinder that moves back can be contained in wherein; Between described perforate and described auxiliary cylinder piston, be provided with an auxiliary cylinder piston rod.Described driving oil cylinder piston rod by described auxiliary cylinder piston rod front end against the diapire of described perforate or the rear end by described auxiliary cylinder piston rod spacing when described auxiliary cylinder piston is implemented in work.Can hold the perforate of moving back the piston auxiliary cylinder by moving back that the piston auxiliary cylinder is built in the driving oil cylinder tail end and offering by rear end at described driving oil cylinder piston rod, can be so that the length of whole pump structure increase when saving the middle brace rod of traditional pump structure.The present invention is with respect to prior art, reduced by an auxiliary cylinder and the length sum of middleware that auxiliary cylinder and driving oil cylinder are linked together.In first embodiment of the present invention, the rear end of auxiliary cylinder piston rod is connected with the auxiliary cylinder piston, in the time of in working order, the auxiliary cylinder piston rod can be contained in the perforate of driving oil cylinder piston-rod end, the bottom that the front end of driving oil cylinder piston rod by the auxiliary cylinder piston rod withstands its terminal perforate is carried out spacing and is built in described driving oil cylinder end owing to move back the piston auxiliary cylinder, holds by described perforate when moving back piston and describedly moves back the piston auxiliary cylinder and move back a described stroke that moves back the piston auxiliary cylinder more.In second embodiment of the present invention, the front end of described auxiliary cylinder piston rod is connected the diapire place of perforate, in the time of so in working order, the rear end of driving oil cylinder piston rod by the auxiliary cylinder piston rod spacing when the auxiliary cylinder piston is implemented in work held by described perforate when moving back piston and describedly moved back the piston auxiliary cylinder and move back a described stroke that moves back the piston auxiliary cylinder more.Therefore, the length of whole pump structure is compared with conventional construction can't increase.Thereby both reached the purpose that is easy to change the concrete piston, make total compact more again, effectively saved the installing space of this pump structure on main frame, and alleviated the weight of whole pump structure, simultaneously can also realize saving the middle brace rod in traditional pump structure, by installing the cleaning of moving back the concrete piston that piston auxiliary cylinder control realizes additional or changing more convenient, quick, saving of labor, save time, increase work efficiency greatly.
Preferably, the position of the diapire of perforate is in the axial direction than the more close described water tank of described main oil cylinder piston, makes the auxiliary cylinder piston rod make full use of the length that driving oil cylinder piston rod volume inside reduces whole pump structure.
Preferably, the length of perforate is a described stroke that moves back the piston auxiliary cylinder.Thereby reduced the length of whole pump structure in simple mode.
First embodiment according to the invention, the rear end of described auxiliary cylinder piston rod be connected with the auxiliary cylinder piston and described driving oil cylinder piston rod by described auxiliary cylinder piston rod front end spacing when the diapire of described perforate is implemented in work, when moving back piston, hold and describedly move back the piston auxiliary cylinder and move back a described stroke that moves back the piston auxiliary cylinder more by described perforate.Herein, the implication of " connection " speech is " one connection " or removably connect.That is to say; in the time of in working order; by selector valve pressure oil-source is communicated with the described piston auxiliary cylinder back cavity that moves back; promote the auxiliary cylinder piston-advance to spacing position; drive the auxiliary cylinder piston rod and move to spacing position (perhaps being called the working position), thereby the diapire that makes the auxiliary cylinder piston rod can withstand the perforate of driving oil cylinder piston-rod end carries out position limitation protection to it.When needs are changed the concrete piston, the back cavity that will move back the piston auxiliary cylinder by selector valve is communicated with fuel tank, make the auxiliary cylinder piston lose position-limiting action, the driving oil cylinder piston rod can promote the auxiliary cylinder piston rod when retreating and the auxiliary cylinder piston retreats to driving oil cylinder stern transom plate place always, thereby the concrete piston is receded in the water tank.
Preferably, described auxiliary cylinder piston sleeve is located on the rear end of described auxiliary cylinder piston rod and is spacing by back-up ring.The described front end that moves back the piston auxiliary cylinder is connected with an auxiliary cylinder end cap with holes by screw thread or fastening piece, and rear end and driving oil cylinder stern transom plate weld together.In order to realize being connected of described auxiliary cylinder piston rod and auxiliary cylinder piston, described auxiliary cylinder piston rod is designed to have at least the stepped construction of middle diameter portion and minor diameter, the size of diameter portion and the aperture on the described auxiliary cylinder cylinder end cap are complementary in described, and described minor diameter is suitable for described auxiliary cylinder piston sleeve and establishes thereon.More preferably, described auxiliary cylinder piston rod also has large-diameter portion, described large-diameter portion and described perforate leave certain clearance, described gap be designed and sized to guarantee auxiliary cylinder piston rod and perforate have be convenient under the situation of enough area of contact the two near the time allow the hydraulic oil between them overflow.Size described large-diameter portion, middle diameter portion, minor diameter depends on the factors such as diameter of auxiliary stroke that moves back the concrete cylinder (its depend on again the concrete piston is receded into additional that section stroke in the water tank) and driving oil cylinder piston rod.
According to an alternative of the present invention, the front end of described auxiliary cylinder piston rod is connected spacing when described auxiliary cylinder piston is implemented in work of the diapire place of perforate and the rear end by described auxiliary cylinder piston rod and holds by described perforate when moving back piston and describedly move back the piston auxiliary cylinder and move back a described stroke that moves back the piston auxiliary cylinder more.Herein, the implication of " connection " speech is " one connection " or removably connect.That is to say, in the time of in working order, pressure oil-source is communicated with the described piston auxiliary cylinder back cavity that moves back, promote the auxiliary cylinder piston-advance, play the position limitation protection effect thereby can withstand the auxiliary cylinder piston rod to the working position by selector valve.When needs are changed the concrete piston, the back cavity that will move back the piston auxiliary cylinder by selector valve is communicated with fuel tank, make the auxiliary cylinder piston lose position-limiting action, the driving oil cylinder piston rod can push away the auxiliary cylinder piston and retreat to driving oil cylinder stern transom plate place always when being with the auxiliary cylinder piston rod to retreat, thereby the concrete piston is receded in the water tank.
Preferably, in each embodiment, the size of described perforate is not less than the described external diameter that moves back the piston auxiliary cylinder.When moving back the concrete piston, the perforate of driving oil cylinder piston rod can surround the external diameter that moves back the piston auxiliary cylinder and continue to draw back.
Preferably, the outer surface of described auxiliary cylinder piston is provided with seal ring, and the back cavity and the described back cavity that moves back the piston auxiliary cylinder of described driving oil cylinder are kept apart.
Preferably, the described front end that moves back the piston auxiliary cylinder by fastening piece for example screw connect or the auxiliary cylinder end cap with holes that is threaded, rear end and driving oil cylinder stern transom plate weld together.This moment, the auxiliary cylinder piston was limited to the working position by auxiliary cylinder end cap backstop.In this case, described auxiliary cylinders hydraulic fluid port is arranged in the described driving oil cylinder stern transom plate, thereby realizes back cavity oil-feed or oil return by the auxiliary cylinders hydraulic fluid port.
In order to realize that the auxiliary cylinder piston is by oil-feed or the oil return and be arranged on described moving back in the piston auxiliary cylinder movably when changing the concrete piston in working order of auxiliary cylinders hydraulic fluid port, described auxiliary cylinders hydraulic fluid port is connected to the actuator port of selector valve, the filler opening of described selector valve passes through one-way valve, be connected to pressure oil-source, its return opening is connected to oil sump tank.This selector valve is two position three-way valve preferably.
The present invention is also corresponding to relate to a kind of concrete pumping system, comprises two concrete pumping structures recited above.
Description of drawings
Technological scheme when Fig. 1 shows the available technology adopting intermediate link;
Fig. 2 shows the technological scheme when saving intermediate link in the prior art;
Fig. 3 shows the schematic representation according to the first embodiment of the present invention;
Fig. 4 shows schematic representation according to a second embodiment of the present invention.
Embodiment
First specific embodiment that the present invention adopts as shown in Figure 3, wherein concrete pumping structure comprises: carry cylinder 1, concrete piston 2, water tank 3, driving oil cylinder 4, driving oil cylinder piston rod 5, auxiliary cylinder piston rod 6, move back piston auxiliary cylinder 7, fuel tank 8, one-way valve 9, selector valve 10, driving oil cylinder stern transom plate 11, auxiliary cylinder piston 12, auxiliary cylinder end cap 13.Described driving oil cylinder piston rod 5 is by concrete pump control device for reversing control to-and-fro motion.Owing to present invention focuses on to change the improvement of concrete piston aspect, therefore under normal circumstances how just no longer to elaborate by concrete pump control device for reversing (not shown) control to-and-fro motion for driving oil cylinder piston rod 5.
In this specific embodiment, concrete piston 2 is installed in the conveying cylinder 1 and its rear end directly connects with the front end of driving oil cylinder piston rod 5 by cutting ferrule latchs such as (or screws).The rear end of driving oil cylinder piston rod 5 has a perforate 14, and driving oil cylinder piston rod 5 is undertaken spacing by the bottom that the front end that helps oil cylinder piston bar 6 withstands described perforate 14.Being designed and sized to of described perforate 14 can be contained in the described piston auxiliary cylinder 7 that moves back wherein.Preferably, described perforate 14 this moment is designed and sized to be not less than and moves back piston auxiliary cylinder 7 external diameters.
In this specific embodiment, move back piston auxiliary cylinder 7 and be built among the described driving oil cylinder 4, auxiliary cylinder piston 12 is by auxiliary cylinders hydraulic fluid port 15 oil-feed or be arranged on described moving back in the piston auxiliary cylinder 7 movably moving back the piston mode oil return in working order.Moving back piston auxiliary cylinder 7 front ends is assembled together by fastening pieces such as screw and auxiliary cylinder end cap 13, moving back piston auxiliary cylinder 7 rear ends and driving oil cylinder stern transom plate 11 welds together, its back cavity is connected with pressure oil-source by auxiliary cylinders hydraulic fluid port 15, specifically as shown in the figure, auxiliary cylinders hydraulic fluid port 15 is connected to the actuator port of selector valve, the filler opening of described selector valve is connected to pressure oil-source by one-way valve 9, and its return opening is connected to oil sump tank 8.
Described auxiliary cylinder piston rod 6 is designed to have large-diameter portion, the stepped construction of middle diameter portion and minor diameter, described large-diameter portion and described perforate leave certain clearance, guarantee under described auxiliary cylinder piston rod and described perforate have the situation of enough area of contact, to be convenient to the two near the time allow the hydraulic oil between them overflow.The size of diameter portion and the aperture on the auxiliary cylinder end cap 13 are complementary in described, and it is thereon sheathed that described minor diameter is suitable for described auxiliary cylinder piston 12.Auxiliary cylinder piston 12 is set on the auxiliary cylinder piston rod 6, and left end is undertaken spacing by the ladder between middle diameter portion and the minor diameter, and right-hand member is spacing by back-up ring 16, thereby firmly that auxiliary cylinder piston 12 is thereon sheathed.Auxiliary cylinder piston 12 is kept apart the back cavity of driving oil cylinder 4 with the back cavity that moves back piston auxiliary cylinder 7, and by realize the seal isolation between these two back cavities at the seal ring that adds on the auxiliary cylinder piston 12.
This embodiment's working principle is: during proper functioning, pressure oil enters the back cavity that moves back piston auxiliary cylinder 7 by one-way valve 9, selector valve, shift auxiliary cylinder piston 12 onto auxiliary cylinder end cap 13 places, because the locking of one-way valve 9, hydraulic oil can not be run out of from the back cavity that moves back piston auxiliary cylinder 7, so auxiliary cylinder piston 12 can not retreat.When perforate 14 diapires of driving oil cylinder piston rod 5 are run into auxiliary cylinder piston rod 6, just blocked, make concrete piston 2 remain on the working position by auxiliary cylinder piston rod 6.When needs are changed or clean concrete piston 2,10 commutations of control selector valve, make and move back piston auxiliary cylinder 7 and be communicated with fuel tank 8, hydraulic oil can freely flow out, owing to there has not been the lock function of one-way valve 9, when crawl operation driving oil cylinder piston rod 5 retreats, driving oil cylinder piston rod 5 just can promote auxiliary cylinder piston rod 6 and retreat, and drive auxiliary cylinder piston 12 and retreat into driving oil cylinder stern transom plate 11 front ends always, the perforate 14 of driving oil cylinder piston rod can surround the external diameter that moves back piston auxiliary cylinder 7 and continue to draw back.Concrete piston 2 is retracted in the water tank 3, and the case lid of so just can fetching boiling water directly cleans or changes concrete piston 2.To concrete piston 2 clean or change finish after, cover tank lid, control selector valve 10 commutation again, make and move back piston auxiliary cylinder 7 back cavities and be connected with pressure oil-source with one-way valve 9 by selector valve 10.Pressure oil enters the back cavity that moves back piston auxiliary cylinder 7 by one-way valve 9, selector valve 10, shift auxiliary cylinder piston 12 onto auxiliary cylinder end cap 13 places again, because the locking of one-way valve 9, hydraulic oil can not be run out of from the back cavity that moves back piston auxiliary cylinder 7, and auxiliary cylinder piston 12 can not retreat.Behind the front end of running into auxiliary cylinder piston rod 6 at the bottom of the hole of the perforate 14 of driving oil cylinder piston rod 5 rear ends, just blocked, make concrete piston 2 remain on normal operation position again by auxiliary cylinder piston rod 6.
Second specific embodiment that the present invention adopts as shown in Figure 4, the difference of Fig. 4 and Fig. 3 only is that the front end of auxiliary cylinder piston rod 6 is connected the diapire place of perforate 14, described auxiliary cylinder piston 12 passing of rear end ejection when moving back piston mode.The implication of " connection " speech is for removably connecting or the one connection herein.The size of perforate this moment is greater than the described external diameter that moves back the piston auxiliary cylinder.At this moment, when changing the concrete piston, the perforate of driving oil cylinder piston rod can surround the external diameter that moves back the piston auxiliary cylinder and continue to draw back, thereby guarantees that the concrete piston can be retracted in the water tank smoothly.Can guarantee the reduction of the whole length of concrete pumping structure so effectively.
The relevant work principle is, during proper functioning, pressure oil enters the back cavity that moves back piston auxiliary cylinder 7 by one-way valve 9, selector valve, shift auxiliary cylinder piston 12 onto auxiliary cylinder end cap 13 places, because the locking of one-way valve 9, hydraulic oil can not be run out of from the back cavity that moves back piston auxiliary cylinder 7, so auxiliary cylinder piston 12 can not retreat.When the auxiliary cylinder piston rod 6 that links together with driving oil cylinder piston rod 5 is run into auxiliary cylinder piston 12, just blocked, make concrete piston 2 remain on the working position by auxiliary cylinder piston 12.When needs are changed or clean concrete piston 2,10 commutations of control selector valve, make and move back piston auxiliary cylinder 7 and be communicated with fuel tank 8, hydraulic oil can freely flow out, owing to there has not been the lock function of one-way valve 9, when crawl operation driving oil cylinder piston rod 5 retreats, driving oil cylinder piston rod 5 and the auxiliary cylinder piston rod 6 that connects thereon retreat together, auxiliary cylinder piston rod 6 drives auxiliary cylinder piston 12 and retreats into driving oil cylinder stern transom plate 11 front ends always, the perforate 4 of driving oil cylinder piston rod surrounds the external diameter that moves back piston auxiliary cylinder 7 and continues to draw back, concrete piston 2 is retracted in the water tank 3, and the case lid of so just can fetching boiling water directly cleans or changes concrete piston 2.To concrete piston 2 clean or change finish after, cover tank lid, control selector valve 10 commutation again, make and move back piston auxiliary cylinder 7 back cavities and be connected with pressure oil-source with one-way valve 9 by selector valve 10.Pressure oil enters the back cavity that moves back piston auxiliary cylinder 7 by one-way valve 9, selector valve 10, shift auxiliary cylinder piston 12 onto auxiliary cylinder end cap 13 places again, because the locking of one-way valve 9, hydraulic oil can not be run out of from the back cavity that moves back piston auxiliary cylinder 7, and auxiliary cylinder piston 12 can not retreat.When the auxiliary cylinder piston rod 6 of driving oil cylinder piston rod 5 is run into auxiliary cylinder piston 12, just be blocked, make concrete piston 2 remain on normal operation position again.
Reference identification
1 carries cylinder 2 concrete pistons
3 water tanks 4 drive oil cylinder
5 drive cylinder piston rod 6 auxiliary cylinder piston rods
7 move back piston auxiliary cylinder 8 fuel tanks
9 one-way valves, 10 selector valves
11 driving oil cylinder stern transom plates, 12 auxiliary cylinder pistons
14 perforates of 13 auxiliary cylinder end caps
15 auxiliary cylinders hydraulic fluid ports, 16 back-up rings.
Claims (16)
1. concrete pumping structure, comprise and carry cylinder (1), water tank (3), driving oil cylinder (4), be provided with concrete piston (2) in the described conveying cylinder (1), the piston rod (5) of described driving oil cylinder (4) drives described concrete piston (2) to-and-fro motion in described conveying cylinder (1) when pumping is worked, wherein said water tank (3) is positioned between described conveying cylinder (1) and the described driving oil cylinder (4), it is characterized in that:
Also comprise and move back piston auxiliary cylinder (7), the described piston auxiliary cylinder (7) that moves back is among described driving oil cylinder (4) end is built in described driving oil cylinder (4), be provided with movably auxiliary cylinder piston (12) in the piston auxiliary cylinder (7) described moving back, described concrete piston brought back to described water tank (3) to allow described piston rod (5) in work timing system or when moving back piston.
2. concrete pumping structure according to claim 1 is characterized in that,
The rear end of described driving oil cylinder piston rod (5) offers perforate (14); Described perforate (14) is designed to and the described piston auxiliary cylinder (7) that moves back can be contained in wherein;
Between described perforate (14) and described auxiliary cylinder piston (12), be provided with an auxiliary cylinder piston rod (6).
3. concrete pumping structure according to claim 2 is characterized in that,
The position of the diapire of described perforate (14) is in the axial direction than the more close described water tank of described main oil cylinder piston (3).
4. concrete pumping structure according to claim 3 is characterized in that,
The length of described perforate (14) is a described stroke that moves back piston auxiliary cylinder (7).
5. according to each described concrete pumping structure among the claim 2-4, it is characterized in that, the rear end of described auxiliary cylinder piston rod (6) be connected with auxiliary cylinder piston (12) and described driving oil cylinder piston rod (5) by described auxiliary cylinder piston rod (6) front end spacing when the diapire of described perforate (14) is implemented in work, when moving back piston, hold and describedly move back piston auxiliary cylinder (7) and move back a described stroke that moves back piston auxiliary cylinder (7) more by described perforate (14).
6. concrete pumping structure according to claim 5 is characterized in that, described auxiliary cylinder piston (12) is set on the rear end of described auxiliary cylinder piston rod (6) and is spacing by back-up ring (16).
7. according to each described concrete pumping structure among the claim 2-4, it is characterized in that the front end of described auxiliary cylinder piston rod (6) is connected the diapire place of perforate (14) and the rear end by described auxiliary cylinder piston rod (6) to be held by described perforate (14) against described auxiliary cylinder piston (12) spacing when being implemented in work and when moving back piston and describedly move back piston auxiliary cylinder (7) and move back a described stroke that moves back piston auxiliary cylinder (7) more.
8. according to each described concrete pumping structure among the claim 1-4, it is characterized in that, the outer surface of described auxiliary cylinder piston (12) is provided with seal ring, and the back cavity and the described back cavity seal isolation of moving back piston auxiliary cylinder (7) of described driving oil cylinder (4) are opened.
9. according to each described concrete pumping structure among the claim 1-4, it is characterized in that, the described front end that moves back piston auxiliary cylinder (7) is connected with an auxiliary cylinder end cap (13) with holes by screw thread or fastening piece, and rear end and driving oil cylinder stern transom plate (11) weld together.
10. concrete pumping structure according to claim 9, it is characterized in that, the stepped construction that described auxiliary cylinder piston rod (6) is designed to have middle diameter portion and minor diameter, the size of diameter portion and the aperture on the described auxiliary cylinder end cap (13) are complementary in described, and it is thereon sheathed that described minor diameter is suitable for described auxiliary cylinder piston (12).
11. concrete pumping structure according to claim 10, it is characterized in that, described auxiliary cylinder piston rod (6) also has large-diameter portion, described large-diameter portion and described perforate (14) leave certain clearance, described gap be designed and sized to guarantee auxiliary cylinder piston rod (6) and perforate (14) have be convenient under the situation of enough area of contact the two near the time allow the hydraulic oil between them overflow.
12. according to each described concrete pumping structure among the claim 1-4, it is characterized in that, described auxiliary cylinder piston (12) by an auxiliary cylinders hydraulic fluid port (15) oil-feed when moving back piston, to allow described piston rod (5) described concrete piston is brought back to described water tank (3) in work timing system or oil return.
13. concrete pumping structure according to claim 12 is characterized in that, described auxiliary cylinders hydraulic fluid port (15) is arranged in the stern transom plate (11) of described driving oil cylinder.
14. concrete pumping structure according to claim 12, it is characterized in that, described auxiliary cylinders hydraulic fluid port (15) is connected to the actuator port of selector valve, and the filler opening of described selector valve is connected to pressure oil-source by one-way valve (9), and its return opening is connected to oil sump tank (8).
15. concrete pumping structure according to claim 9 is characterized in that, described auxiliary cylinder piston (12) passes through auxiliary cylinder end cap (13) backstop in the working position.
16. concrete pumping system comprises two according to each described concrete pumping structure among the claim 1-15.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101250595A CN101776053B (en) | 2010-03-16 | 2010-03-16 | Concrete pumping structure |
| PCT/CN2010/074862 WO2011113241A1 (en) | 2010-03-16 | 2010-06-30 | Concrete pumping structure |
| EP10847710A EP2549103A1 (en) | 2010-03-16 | 2010-06-30 | Concrete pumping structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101250595A CN101776053B (en) | 2010-03-16 | 2010-03-16 | Concrete pumping structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101776053A true CN101776053A (en) | 2010-07-14 |
| CN101776053B CN101776053B (en) | 2012-09-05 |
Family
ID=42512607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101250595A Active CN101776053B (en) | 2010-03-16 | 2010-03-16 | Concrete pumping structure |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2549103A1 (en) |
| CN (1) | CN101776053B (en) |
| WO (1) | WO2011113241A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032135A (en) * | 2010-11-11 | 2011-04-27 | 三一重工股份有限公司 | Concrete pump and pumping system thereof |
| CN102374150A (en) * | 2010-08-12 | 2012-03-14 | 中集车辆（山东）有限公司 | Pumping mechanism capable of replacing concrete piston |
| WO2012034424A1 (en) * | 2010-09-19 | 2012-03-22 | 湖南三一智能控制设备有限公司 | Pumping mechanism |
| WO2012034425A1 (en) * | 2010-09-19 | 2012-03-22 | 湖南三一智能控制设备有限公司 | Pumping mechanism |
| CN102588241A (en) * | 2011-10-14 | 2012-07-18 | 三一重工股份有限公司 | Concrete pump and pumping mechanism thereof |
| CN102927078A (en) * | 2012-10-31 | 2013-02-13 | 三一重工股份有限公司 | Hydraulic oil cylinder and pumping mechanism and engineering machinery comprising same |
| CN103104434A (en) * | 2011-11-14 | 2013-05-15 | 徐工集团工程机械股份有限公司 | Concrete piston automatic returning device in closed type pumping system |
| CN105422408A (en) * | 2015-12-09 | 2016-03-23 | 长沙琦清机械设备有限公司 | Industrial emulsion explosive conveying device and conveying method |
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| CN103775300B (en) * | 2014-02-20 | 2016-08-17 | 中联重科股份有限公司 | pumping device |
| CN114876758B (en) * | 2022-04-30 | 2024-02-13 | 青岛盘古智能制造股份有限公司 | Vacuum pump and application system and method thereof |
| CN120466263A (en) * | 2025-05-19 | 2025-08-12 | 徐州金鼎恒立液压件有限公司 | A hydraulic cylinder convenient for stroke adjustment |
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| CN201486790U (en) * | 2009-08-10 | 2010-05-26 | 福田雷沃重机股份有限公司 | Pumping mechanism capable of changing strokes and pump vehicle provided therewith |
| CN101705928A (en) * | 2009-12-01 | 2010-05-12 | 北汽福田汽车股份有限公司 | Concrete transfer pump |
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- 2010-03-16 CN CN2010101250595A patent/CN101776053B/en active Active
- 2010-06-30 EP EP10847710A patent/EP2549103A1/en not_active Withdrawn
- 2010-06-30 WO PCT/CN2010/074862 patent/WO2011113241A1/en not_active Ceased
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| US4270440A (en) * | 1979-02-22 | 1981-06-02 | Weatherford/Dmc | High pressure piston and seal |
| CN2851676Y (en) * | 2005-12-09 | 2006-12-27 | 徐州重型机械有限公司 | Hydraulic cylinder with double work travels |
| CN2881144Y (en) * | 2005-12-26 | 2007-03-21 | 中集车辆（集团）有限公司 | Pumping structure capable of easy changing concrete piston |
| CN201165948Y (en) * | 2007-12-06 | 2008-12-17 | 北京华强京工机械制造有限公司 | Conveying device of concrete pump |
| CN201310456Y (en) * | 2008-11-13 | 2009-09-16 | 福田雷沃重机股份有限公司 | Oil cylinder and concrete mixer for rapidly replacing concrete piston |
| CN201851298U (en) * | 2010-03-16 | 2011-06-01 | 三一重工股份有限公司 | Concrete pumping structure |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374150A (en) * | 2010-08-12 | 2012-03-14 | 中集车辆（山东）有限公司 | Pumping mechanism capable of replacing concrete piston |
| WO2012034424A1 (en) * | 2010-09-19 | 2012-03-22 | 湖南三一智能控制设备有限公司 | Pumping mechanism |
| WO2012034425A1 (en) * | 2010-09-19 | 2012-03-22 | 湖南三一智能控制设备有限公司 | Pumping mechanism |
| CN102032135A (en) * | 2010-11-11 | 2011-04-27 | 三一重工股份有限公司 | Concrete pump and pumping system thereof |
| CN102032135B (en) * | 2010-11-11 | 2013-09-25 | 三一汽车制造有限公司 | Concrete pump |
| CN102588241A (en) * | 2011-10-14 | 2012-07-18 | 三一重工股份有限公司 | Concrete pump and pumping mechanism thereof |
| CN102588241B (en) * | 2011-10-14 | 2015-01-14 | 三一汽车制造有限公司 | Concrete pump and pumping mechanism thereof |
| CN103104434A (en) * | 2011-11-14 | 2013-05-15 | 徐工集团工程机械股份有限公司 | Concrete piston automatic returning device in closed type pumping system |
| CN103104434B (en) * | 2011-11-14 | 2015-06-03 | 徐州徐工施维英机械有限公司 | Concrete piston automatic returning device in closed type pumping system |
| CN102927078A (en) * | 2012-10-31 | 2013-02-13 | 三一重工股份有限公司 | Hydraulic oil cylinder and pumping mechanism and engineering machinery comprising same |
| CN105422408A (en) * | 2015-12-09 | 2016-03-23 | 长沙琦清机械设备有限公司 | Industrial emulsion explosive conveying device and conveying method |
| CN105422408B (en) * | 2015-12-09 | 2017-07-07 | 湖南金能自动化设备有限公司 | The conveying device and carrying method of industrial emulsion explosive |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011113241A1 (en) | 2011-09-22 |
| EP2549103A1 (en) | 2013-01-23 |
| CN101776053B (en) | 2012-09-05 |
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