CN101776053B - Concrete pumping structure - Google Patents
Concrete pumping structure Download PDFInfo
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- CN101776053B CN101776053B CN2010101250595A CN201010125059A CN101776053B CN 101776053 B CN101776053 B CN 101776053B CN 2010101250595 A CN2010101250595 A CN 2010101250595A CN 201010125059 A CN201010125059 A CN 201010125059A CN 101776053 B CN101776053 B CN 101776053B
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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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- 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 through middle brace rod, and as shown in Figure 1 (middle extension bar can pass through screw attachment with being connected of driving oil cylinder piston rod and concrete piston; Also can connect, be illustrated as screw attachment) through cutting ferrule.When needs dismounting concrete piston; At first middle brace rod 2 is pulled down; Crawl operation lets driving oil cylinder piston rod 3 advance then, makes 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 is retreated, and concrete piston 1 is retracted in the water tank.Install by above-mentioned inverse process again after having torn open, operation is inconvenience very, 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, as shown in Figure 2, and 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 through cutting ferrule 3; With the stroke lengthening of 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 through an one-way valve 11; During proper functioning; Pressure oil gets into the back cavity of spacing piston oil-cylinder 9 through one-way valve, selector valve, shifts 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 be retreated.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 were changed or clean concrete piston 2,12 switching-overs of control selector valve made spacing piston oil-cylinder 9 be communicated with fuel tank 10; Hydraulic oil can freely flow out, owing to do not had the lock function of one-way valve 11, and when crawl operation driving oil cylinder piston rod 4 is retreated; 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 is shifted spacing piston 8 onto front end back-up ring 7 places again through the back cavity of one-way valve 11, the spacing piston oil-cylinder 9 of selector valve 12 entering, 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 be retreated.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 existing technology; Make total compact more attractive in appearance, and alleviated the weight of whole pump structure.
Realize through following scheme according to the object of the invention: a kind of concrete pumping structure; Comprise and carry cylinder, water tank, driving oil cylinder; Be provided with the concrete piston in the said conveying cylinder; The piston rod of said driving oil cylinder drives the to-and-fro motion in said conveying cylinder of said concrete piston when pumping is worked; Wherein said water tank is characterized in that between said conveying cylinder and said driving oil cylinder: comprise also and move back the piston auxiliary cylinder that the said piston auxiliary cylinder that moves back is among said driving oil cylinder end is built in said driving oil cylinder; Be provided with movably auxiliary cylinder piston in the piston auxiliary cylinder said moving back, said auxiliary cylinder piston allows said piston rod that said concrete piston brought back in said water tank to get back to said water tank or oil return at the said concrete piston of work timing system when moving back piston through the oil-feed of an auxiliary cylinders hydraulic fluid port.
Through 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 space in the 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 existing technology.
According to further improvement project of the present invention, the rear end of said driving oil cylinder piston rod offers perforate; Said perforate is designed to and can the said piston auxiliary cylinder that moves back be contained in wherein; The rear end of said driving oil cylinder piston rod offers perforate; Said perforate is designed to and can the said piston auxiliary cylinder that moves back be contained in wherein; Between said perforate and said auxiliary cylinder piston, be provided with an auxiliary cylinder piston rod.Said driving oil cylinder piston rod through said auxiliary cylinder piston rod front end against the diapire of said perforate or the rear end through said auxiliary cylinder piston rod spacing when said auxiliary cylinder piston is implemented in work.Can hold the perforate of moving back the piston auxiliary cylinder through moving back that the piston auxiliary cylinder is built in the driving oil cylinder tail end and offering through rear end at said 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 existing technology, 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 through the auxiliary cylinder piston rod withstands its terminal perforate is carried out spacing and to be built in said driving oil cylinder terminal owing to move back the piston auxiliary cylinder, when moving back piston, holds through said perforate and saidly moves back the piston auxiliary cylinder and move back a said stroke that moves back the piston auxiliary cylinder more.In second embodiment of the present invention; The front end of said 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 through the auxiliary cylinder piston rod spacing when the auxiliary cylinder piston is implemented in work held through said perforate when moving back piston and saidly moved back the piston auxiliary cylinder and move back a said 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 save the installing space of this pump structure on main frame, and alleviated the weight of whole pump structure, can also realize saving simultaneously the middle brace rod in traditional pump structure; Through 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 in the axial direction than said main oil cylinder piston more near said water tank, make 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 said stroke that moves back the piston auxiliary cylinder.Thereby reduced the length of whole pump structure with simple mode.
First embodiment according to the invention; The rear end of said auxiliary cylinder piston rod be connected with the auxiliary cylinder piston and said driving oil cylinder piston rod through said auxiliary cylinder piston rod front end spacing when the diapire of said perforate is implemented in work, when moving back piston, hold and saidly move back the piston auxiliary cylinder and move back a said stroke that moves back the piston auxiliary cylinder more through said perforate.Here, the implication of " connection " speech is " one connection " or removably connect.That is to say; In the time of in working order; Through selector valve pressure oil-source is communicated with the said piston auxiliary cylinder back cavity that moves back; Promote 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 through selector valve is communicated with fuel tank; Make the auxiliary cylinder piston lose position-limiting action; The driving oil cylinder piston rod when retreating, can promote the auxiliary cylinder piston rod and the auxiliary cylinder piston is retreated to driving oil cylinder stern transom plate place always, thereby the concrete piston is receded in the water tank.
Preferably, said auxiliary cylinder piston sleeve is located on the rear end of said auxiliary cylinder piston rod and is spacing through back-up ring.The said front end that moves back the piston auxiliary cylinder is connected with an auxiliary cylinder end cap with holes through screw thread or fastening piece, and rear end and driving oil cylinder stern transom plate weld together.In order to realize being connected of said auxiliary cylinder piston rod and auxiliary cylinder piston; Said 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 said auxiliary cylinder cylinder end cap are complementary in said, and said minor diameter is suitable for said auxiliary cylinder piston sleeve and establishes above that.More preferably; Said auxiliary cylinder piston rod also has large-diameter portion; Said large-diameter portion and said perforate leave certain clearance, said 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 let the hydraulic oil between them overflow.Size said 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 said auxiliary cylinder piston rod is connected spacing when said auxiliary cylinder piston is implemented in work of the diapire place of perforate and the rear end through said auxiliary cylinder piston rod and when moving back piston, holds through said perforate and saidly move back the piston auxiliary cylinder and move back a said stroke that moves back the piston auxiliary cylinder more.Here, 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 said 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 through selector valve.When needs are changed the concrete piston; The back cavity that will move back the piston auxiliary cylinder through 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 said perforate is not less than the said 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 said auxiliary cylinder piston is provided with seal ring, and the back cavity and the said back cavity that moves back the piston auxiliary cylinder of said driving oil cylinder are kept apart.
Preferably, for example screw connects the said front end that moves back the piston auxiliary cylinder or the auxiliary cylinder end cap with holes that is threaded through fastening piece, and rear end and driving oil cylinder stern transom plate weld together.This moment, the auxiliary cylinder piston was limited to the working position through auxiliary cylinder end cap backstop.In this case, said auxiliary cylinders hydraulic fluid port is arranged in the said driving oil cylinder stern transom plate, thereby realizes back cavity oil-feed or oil return through the auxiliary cylinders hydraulic fluid port.
In order to realize that the auxiliary cylinder piston is through oil-feed or the oil return and be arranged on said moving back in the piston auxiliary cylinder movably when changing the concrete piston in working order of auxiliary cylinders hydraulic fluid port; Said auxiliary cylinders hydraulic fluid port is connected to the actuator port of selector valve; The filler opening of said 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 existing technology;
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 is as shown in Figure 3, and 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.Said 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 to set forth no longer in detail 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 through 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 carries out spacing through the bottom that the front end that helps oil cylinder piston bar 6 withstands said perforate 14.Being designed and sized to of said perforate 14 can be contained in the said piston auxiliary cylinder 7 that moves back wherein.Preferably, said 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 said driving oil cylinder 4, auxiliary cylinder piston 12 is through auxiliary cylinders hydraulic fluid port 15 oil-feed or be arranged on said 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 through 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 through auxiliary cylinders hydraulic fluid port 15, and 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 said selector valve is connected to pressure oil-source through one-way valve 9, and its return opening is connected to oil sump tank 8.
Said auxiliary cylinder piston rod 6 is designed to have large-diameter portion, the stepped construction of middle diameter portion and minor diameter; Said large-diameter portion and said perforate leave certain clearance, guarantee under said auxiliary cylinder piston rod and said perforate have the situation of enough area of contact, to be convenient to the two near the time let the hydraulic oil between them overflow.Size and the aperture on the auxiliary cylinder end cap 13 of diameter portion are complementary in said, and it is above that sheathed that said minor diameter is suitable for said auxiliary cylinder piston 12.Auxiliary cylinder piston 12 is set on the auxiliary cylinder piston rod 6, and left end carries out spacing through the ladder between middle diameter portion and the minor diameter, and right-hand member is spacing through back-up ring 16, thereby firmly that auxiliary cylinder piston 12 is above that 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 through realizing the seal 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 gets into the back cavity that moves back piston auxiliary cylinder 7 through 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 be retreated.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 switching-overs 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 is retreated; Driving oil cylinder piston rod 5 just can promote auxiliary cylinder piston rod 6 and retreat, and drives auxiliary cylinder piston 12 and retreat into driving oil cylinder stern transom plate 11 front ends always, and 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 switching-over again, make and move back piston auxiliary cylinder 7 back cavities and be connected with pressure oil-source with one-way valve 9 through selector valve 10.Pressure oil gets into the back cavity that moves back piston auxiliary cylinder 7 through 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 be retreated.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 is as shown in Figure 4, and 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, and ejection when moving back piston mode said auxiliary cylinder piston 12 in rear end is passed.The implication of " connection " speech is for removably connecting or the one connection here.The size of perforate this moment is greater than the said 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 does; During proper functioning; Pressure oil gets into the back cavity that moves back piston auxiliary cylinder 7 through one-way valve 9, selector valve, shifts 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 be retreated.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 were changed or clean concrete piston 2,10 switching-overs of control selector valve made and move back piston auxiliary cylinder 7 and be communicated with fuel tank 8; Hydraulic oil can freely flow out, owing to do not had the lock function of one-way valve 9, and when crawl operation driving oil cylinder piston rod 5 is retreated; Driving oil cylinder piston rod 5 and the auxiliary cylinder piston rod 6 that connects are above that retreated together; Auxiliary cylinder piston rod 6 drives auxiliary cylinder piston 12 and retreats into driving oil cylinder stern transom plate 11 front ends always, and 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, and concrete piston 2 is retracted in the water tank 3; 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 switching-over again, make and move back piston auxiliary cylinder 7 back cavities and be connected with pressure oil-source with one-way valve 9 through selector valve 10.Pressure oil gets into the back cavity that moves back piston auxiliary cylinder 7 through 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 be retreated.When the auxiliary cylinder piston rod 6 of driving oil cylinder piston rod 5 is run into auxiliary cylinder piston 12, just blocked, make concrete piston 2 remain on normal operation position again.
Reference identification
1 carries cylinder 2 concrete pistons
3 water tanks, 4 driving oil cylinder
5 driving oil cylinder piston rods, 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 (15)
1. concrete pumping structure; Comprise and carry cylinder (1), water tank (3), driving oil cylinder (4); Be provided with concrete piston (2) in the said conveying cylinder (1); The driving oil cylinder piston rod (5) of said driving oil cylinder (4) drives said concrete piston (2) to-and-fro motion in said conveying cylinder (1) when pumping is worked, wherein said water tank (3) is positioned between said conveying cylinder (1) and the said driving oil cylinder (4), it is characterized in that:
Also comprise and move back piston auxiliary cylinder (7); The said piston auxiliary cylinder (7) that moves back is among said driving oil cylinder (4) end is built in said driving oil cylinder (4); Be provided with movably auxiliary cylinder piston (12) in the piston auxiliary cylinder (7) said moving back; To allow said driving oil cylinder piston rod (5) that said concrete piston is brought back to said water tank (3) in work timing system or when moving back piston, the rear end of said driving oil cylinder piston rod (5) offers perforate (14); Said perforate (14) is designed to and can the said piston auxiliary cylinder (7) that moves back be contained in wherein; Between said perforate (14) and said auxiliary cylinder piston (12), be provided with an auxiliary cylinder piston rod (6).
2. concrete pumping structure according to claim 1 is characterized in that,
The position of the diapire of said perforate (14) in the axial direction than driving oil cylinder piston more near said water tank (3).
3. concrete pumping structure according to claim 2 is characterized in that,
The length of said perforate (14) is a said stroke that moves back piston auxiliary cylinder (7).
4. according to each described concrete pumping structure among the claim 1-3; It is characterized in that; The rear end of said auxiliary cylinder piston rod (6) be connected with auxiliary cylinder piston (12) and said driving oil cylinder piston rod (5) through said auxiliary cylinder piston rod (6) front end spacing when the diapire of said perforate (14) is implemented in work, when moving back piston, hold and saidly move back piston auxiliary cylinder (7) and move back a said stroke that moves back piston auxiliary cylinder (7) more through said perforate (14).
5. concrete pumping structure according to claim 4 is characterized in that, said auxiliary cylinder piston (12) is set on the rear end of said auxiliary cylinder piston rod (6) and is spacing through back-up ring (16).
6. according to each described concrete pumping structure among the claim 1-3; It is characterized in that the front end of said auxiliary cylinder piston rod (6) is connected the diapire place of perforate (14) and the rear end through said auxiliary cylinder piston rod (6) to be held through said perforate (14) against said auxiliary cylinder piston (12) spacing when being implemented in work and when moving back piston and saidly move back piston auxiliary cylinder (7) and move back a said stroke that moves back piston auxiliary cylinder (7) more.
7. according to each described concrete pumping structure among the claim 1-3; It is characterized in that; The outer surface of said auxiliary cylinder piston (12) is provided with seal ring, and the back cavity and the said back cavity seal of moving back piston auxiliary cylinder (7) of said driving oil cylinder (4) are opened.
8. according to each described concrete pumping structure among the claim 1-3; It is characterized in that; The said front end that moves back piston auxiliary cylinder (7) is connected with an auxiliary cylinder end cap (13) with holes through screw thread or fastening piece, and rear end and driving oil cylinder stern transom plate (11) weld together.
9. concrete pumping structure according to claim 8; It is characterized in that; The stepped construction that said 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 said auxiliary cylinder end cap (13) are complementary in said, and it is above that sheathed that said minor diameter is suitable for said auxiliary cylinder piston (12).
10. concrete pumping structure according to claim 9; It is characterized in that; Said auxiliary cylinder piston rod (6) also has large-diameter portion; Said large-diameter portion and said perforate (14) leave certain clearance, said 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 let the hydraulic oil between them overflow.
11. according to each described concrete pumping structure among the claim 1-3; It is characterized in that, said auxiliary cylinder piston (12) through an auxiliary cylinders hydraulic fluid port (15) oil-feed when moving back piston, to allow said driving oil cylinder piston rod (5) said concrete piston is brought back to said water tank (3) in work timing system or oil return.
12. concrete pumping structure according to claim 11 is characterized in that, said auxiliary cylinders hydraulic fluid port (15) is arranged in the stern transom plate (11) of said driving oil cylinder.
13. concrete pumping structure according to claim 11; It is characterized in that; Said auxiliary cylinders hydraulic fluid port (15) is connected to the actuator port of selector valve, and the filler opening of said selector valve is connected to pressure oil-source through one-way valve (9), and its return opening is connected to oil sump tank (8).
14. concrete pumping structure according to claim 8 is characterized in that, said auxiliary cylinder piston (12) passes through auxiliary cylinder end cap (13) backstop in the working position.
15. concrete pumping system comprises two according to each described concrete pumping structure among the claim 1-14.
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 CN101776053A (en) | 2010-07-14 |
| CN101776053B true CN101776053B (en) | 2012-09-05 |
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| 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) |
Families Citing this family (10)
| 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 |
| CN101956459B (en) * | 2010-09-19 | 2011-12-21 | 三一重工股份有限公司 | Pumping machine |
| CN101982636B (en) * | 2010-09-19 | 2011-12-21 | 三一重工股份有限公司 | Pumping machine |
| CN102032135B (en) * | 2010-11-11 | 2013-09-25 | 三一汽车制造有限公司 | Concrete pump |
| CN102588241B (en) * | 2011-10-14 | 2015-01-14 | 三一汽车制造有限公司 | Concrete pump and pumping mechanism thereof |
| 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 |
| CN102927078B (en) * | 2012-10-31 | 2016-01-20 | 三一重工股份有限公司 | A kind of hydraulic jack and there is its pumping mechanism, engineering machinery |
| CN103775300B (en) * | 2014-02-20 | 2016-08-17 | 中联重科股份有限公司 | Pumping equipment |
| 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 |
| 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 |
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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 active Application Filing
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| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101776053A (en) | 2010-07-14 |
| EP2549103A1 (en) | 2013-01-23 |
| WO2011113241A1 (en) | 2011-09-22 |
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