CN102410204B - Pumping machine, pumping system and distribution valve thereof - Google Patents
Pumping machine, pumping system and distribution valve thereof Download PDFInfo
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- CN102410204B CN102410204B CN201110329970.2A CN201110329970A CN102410204B CN 102410204 B CN102410204 B CN 102410204B CN 201110329970 A CN201110329970 A CN 201110329970A CN 102410204 B CN102410204 B CN 102410204B
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Abstract
The invention discloses a distribution valve, which comprises a valve body (1) and a valve core (2) in slide fit, wherein the valve body (1) is provided with a feed port (11), a first feed and discharge port (121), a second feed and discharge port (122), a first pumping port (131) and a second pumping port (133); the valve core (2) is provided with a first pumping channel (21), a second pumping passage (22) and a suction passage (23); when the feed port (11), the suction passage (23) and the first feed and discharge port (121) are in communication, the second feed and discharge port (122) is communicated with the second pumping port (132) through the second pumping passage (22); and when the feed port (11), the suction passage (23) and the second feed and discharge port (122) are in communication, the first feed and discharge port (121) is communicated with the first pumping port (131) through the first pumping passage (21). The invention also discloses a pumping system and a pumping machine comprising the distribution valve.
Description
Technical field
The invention belongs to the technical field of pumping machine, particularly a kind of distributing valve of pumping system, comprise this distributing valve pumping system, comprise the pumping machine of this pumping system.
Background technique
Conventional pumping system generally includes pumping power section, material container, distributing valve and delivery pipe.Pumping power section comprises the first conveying cylinder and the second conveying cylinder, and first carries cylinder and second to carry cylinder to be arranged side by side in material container front portion, and its inner piston carries out respectively fore and aft motion under the driving of an oil hydraulic cylinder.Distributing valve has various structures, and conventional have S type valve, gate valve, C shape valve, skirt valve etc.
The working principle of pumping system is: in the predetermined very first time, distributing valve is in a kind of state, and now, first carries cylinder to communicate with material container, and second carries cylinder to communicate with delivery pipe by distributing valve; Now, first carries cylinder can from material container, suck material, and second carries the cylinder can be by distributing valve to stock in delivery pipe.In the second predetermined time, distributing valve is in another kind of state, and now, first carries cylinder to communicate with delivery pipe by distributing valve, and second carries cylinder to communicate with material container.Conversion by distributing valve at two states, carries cylinder to carry out in turn suction and stock, realizes the object of pumping for two.
The patent No. is that the application documents of CN03118016 disclose a kind of distribution valve for concrete transport pump, it comprises bow type supply pipe and the arrow type feeding tube being fixedly connected with, bow type feeding tube has two discharge ports, two discharge port center distance are the twice of supporting concrete cylinder spacing T, arrow type feeding tube has a material feeding mouth, symmetrical two discharge ports, its material feeding mouth is centered close to the center position of bow type supply pipe two discharge ports, and the spacing of its two discharge port is T.
Adopt this structure, by push oil cylinder, can promote distributing valve in Huo You working position, left working position, when the intake port of bow type supply pipe feeds concrete to left concrete cylinder, arrow type feeding tube is carried the concrete in right concrete cylinder, when the intake port of bow type supply pipe feeds concrete to right concrete cylinder, arrow type feeding tube is carried the concrete in left concrete cylinder, realizes the object of delivering concrete.
Yet, in the working position handoff procedure of the distribution valve for concrete transport pump of said structure, because bow type supply pipe is fixedly connected with arrow type feeding tube and the material feeding mouth of arrow type feeding tube is positioned at the center position of bow type supply pipe two discharge ports, during switching, push oil cylinder need promote the two simultaneously and moves together, and while causing switching, required power consumption is larger; In addition, due to the import material-receiving bucket of bow type supply pipe, when distributing valve moves, also need to drive hopper to move together, so the needed driving force ratio of distributing valve is larger, also makes in the handoff procedure of distributing valve power consumption larger.
In view of this, urgently for above-mentioned technical problem, for the further optimal design of concrete structure of above-mentioned distributing valve, make its commutation resistance less, required power consumption while reducing to switch, and there is feature simple in structure.
Summary of the invention
The technical problem to be solved in the present invention is the distributing valve that is provided for pumping system, and the commutation resistance of this distributing valve is less, and during switching, required power consumption is less, and this distributing valve also has simple in structure, convenient processing and manufacture, feature simple to operate.On this basis, another problem that the present invention will solve is for a kind of pumping system that comprises above-mentioned distributing valve is provided, and the pumping machine that comprises this pumping system.
For solving the problems of the technologies described above, the invention provides a kind of distributing valve of pumping system, comprise valve body; Also comprise spool, be provided with and can hold described spool inner chamber in axial sliding in described valve body, the wall of described inner chamber matches with the outer circumferential face of described spool; The intake port, the first feeding and discharging hole, the second feeding and discharging hole, the first stock hole and the second stock hole that are all communicated to inner chamber are set on described valve body; Described spool arranges the first stock passage, the second stock passage and the suction passage between described the first stock passage and described the second stock passage; When import, the outlet of described suction passage communicate with described intake port, described the first feeding and discharging hole, described the second feeding and discharging hole communicates with described the second stock hole by the second stock passage; When import, the outlet of described suction passage communicate with described intake port, described the second feeding and discharging hole, described the first feeding and discharging hole communicates with described the first stock hole by the first stock passage.
Preferably, described intake port is an elongated hole.
Preferably, described intake port comprises the first sub-intake port and the second sub-intake port; Described the first feeding and discharging hole communicates with described intake port and communicates with described the first sub-intake port for described the first feeding and discharging hole; Described the second feeding and discharging hole communicates with described intake port and communicates with described the second sub-intake port for described the second feeding and discharging hole.
Preferably, the cross section of the fitting surface between the wall of described inner chamber and the outer circumferential face of described spool is circular.
Preferably, the import of described suction passage is positioned at the end face of described spool, corresponding with described intake port; Its outlet is positioned at the sidewall of described spool, corresponding with described the first feeding and discharging hole, described the second feeding and discharging hole.
Preferably, the cross section of described suction passage is circular, and its center line is circular arc.
Preferably, the circular arc that the center line of described suction passage is quadrant.
The distributing valve of a kind of pumping system provided by the present invention, comprises valve body and spool, the inner chamber that the internal face formation of valve body and the outer circumferential face of spool are slidably matched; Intake port, the first feeding and discharging hole, the second feeding and discharging hole, the first stock hole and the second stock hole are set on valve body; Spool arranges the first stock passage, the second stock passage and the suction passage between the first stock passage and the second stock passage; When import, the outlet of suction passage communicate with intake port, the first feeding and discharging hole, the second feeding and discharging hole communicates with the second stock hole by the second stock passage; When import, the outlet of suction passage communicate with intake port, the second feeding and discharging hole, the first feeding and discharging hole communicates with the first stock hole by the first stock passage.
At the first state, spool is positioned at first limit position, and now, the import of the first stock passage of spool communicates with the first feeding and discharging hole, and its outlet communicates with the first stock hole, and the first feeding and discharging hole is communicated with the first stock hole.The import of the suction passage of spool communicates with intake port, and its outlet communicates with the second feeding and discharging hole, so that intake port communicates with the second feeding and discharging hole.Now, second carries cylinder from material container, to suck material by suction passage, first carry cylinder can be by stock passage by its inner material pumping to Y-tube, then be pumped in delivery pipe by Y-tube.
At the first state, keep, after the scheduled time, can making spool move to another limit position along directions X, can make distributing valve be transformed into the second state.
At the second state, spool is positioned at second limit position, and now, the import of the second stock passage of spool communicates with the second feeding and discharging hole, and its outlet communicates with the second stock hole, and the second feeding and discharging hole is communicated with the second stock hole.The import of the suction passage of spool communicates with intake port, and its outlet communicates with the first feeding and discharging hole, so that intake port communicates with the first feeding and discharging hole.Now, first carries cylinder from material container, to suck material by suction passage, second carry cylinder can be by stock passage by its inner material pumping to Y-tube, then be pumped in delivery pipe by Y-tube.
According to foregoing description, compared with prior art, distributing valve provided by the invention only has slide member of spool, and the switching of two limit positions by slide member has realized pumping commutation, have simple in structure, easy for installation, the advantage of reliable performance.In addition, due to the slide member of distributing valve be spool not in hopper, material surface of contact when spool moves and in hopper is less, the required material resistance overcoming is less, therefore distributing valve carries out state and changes needed driving force and greatly reduce, and then can reduce the energy consumption of distributing valve.
The present invention also provides a kind of pumping system, comprise hopper, at least two conveying cylinders, at least one distributing valve and at least one commutation driving mechanism, described distributing valve adopts the distributing valve described in above-mentioned any one, described valve body is arranged at described feed hopper bottom, and the material spilling hole of described hopper and the intake port of described valve body communicate; Described commutation driving mechanism is connected with described spool.
Preferably, described commutation driving mechanism is telescopic oil cylinder, and described telescopic oil cylinder stretches along the longitudinal center line of described spool.
The present invention also provides a kind of pumping machine, comprises pumping system and chassis, and described pumping system is arranged on chassis, and described pumping system adopts pumping system as above.
Because above-mentioned distributing valve has above-mentioned technique effect, therefore comprise the pumping system of this distributing valve, and comprise that the pumping machine of above-mentioned pumping system all should have identical technique effect, does not repeat them here.
Accompanying drawing explanation
Fig. 1 is a kind of explosive view of embodiment that the invention provides the distributing valve of pumping system;
Fig. 2-1st, the invention provides the ssembly drawing of the distributing valve of pumping system, and this figure shows the structure of distributing valve when the first state simultaneously;
Fig. 2-2 show distributing valve that the embodiment of the present invention the provides structure when the second state;
Fig. 3 is in distributing valve provided by the invention, the structural representation of another kind of valve body 1;
Fig. 4 shows the structural representation of pumping system provided by the invention.
Wherein, the component names in Fig. 1 to Fig. 4 and the corresponding relation between reference character are: valve body 1; Spool 2; Hopper 3; Y-tube 4; First carries cylinder 51; Second carries cylinder 52; Inner chamber 101; Intake port 11; The first sub-intake port 111; The second sub-intake port 112; The first feeding and discharging hole 121; The second feeding and discharging hole 122; The first stock hole 131; The second stock hole 132; The first stock passage 21; The second stock passage 22; Suction passage 23; The first discharge port 41; The second discharge port 42.
Embodiment
Core of the present invention is for a kind of distributing valve for pumping system is provided, and this distributing valve can be realized the pumping commutation to material, and commutation resistance is little, commutation power consumption is less, and this distributing valve is simple in structure, convenient processing and manufacture, simple to operate.Another core of the present invention is for a kind of pumping system that comprises above-mentioned distributing valve is provided, and the pumping machine that comprises this pumping system.
In order to make those skilled in the art understand better technological scheme of the present invention, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 1 to Fig. 2-2, Fig. 1 is a kind of explosive view of embodiment that the invention provides the distributing valve of pumping system; Fig. 2-1st, the invention provides the ssembly drawing of the distributing valve of pumping system, and this figure shows the structure of distributing valve when the first state simultaneously; Fig. 2-2 show distributing valve that the embodiment of the present invention the provides structure when the second state.
The distributing valve of pumping system provided by the invention comprises valve body 1 and is set in the spool 2 of valve inner.The interior formation of valve body 1 is held spool 2, is made its inner chamber 101 in axial sliding, and the inner chamber 101 on the internal face of the outer circumferential face of spool 2 and valve body 1 matches, and then spool 2 can be slided with respect to valve body 1 on directions X.As shown in Figure 1, in this example, the cross section of valve body 1 outer surface is rectangle, and the cross section of inner chamber 101 is circular, and the cross section of spool 2 is also circular, and described cross section is the cross section vertical with directions X.Like this, between valve body 1 internal face and the outer circumferential face of spool 2, form mating annular face, between the two, the cross section of fitting surface is circular.The cross section of fitting surface is that circle not only facilitates machining, also has to utilize to improve quality of fit, guarantees the sealing of fitting surface.The cross section that is appreciated that inner chamber 101 can be also rectangle or other concrete shapes, and corresponding, the outer circumferential face of spool 2 can be other shapes that coordinate with inner chamber 101 internal faces.
The sub-intake port 112 of the first sub-intake port 111, second, the first feeding and discharging hole 121, the second feeding and discharging hole 122, the first stock hole 131 and the second stock hole 132 are set on valve body 1.Wherein, the first sub-intake port 111 and the second sub-intake port 112 are positioned at the roof of valve body 1, take Fig. 1 in reference; The first feeding and discharging hole 121 and the second feeding and discharging hole 122 are arranged in the first side wall; The first stock hole 131 and the second stock hole 132 are arranged in the second sidewall; The first side wall is relative with the second sidewall, and the first stock hole 131 is relative with the second feeding and discharging hole 122 with the first feeding and discharging hole 121 respectively with the second stock hole 132.In this example, 6 holes are circular hole, and the inner chamber 101 that is all communicated with valve body 1 is with extraneous; And the center line in the center line in the center line of the first sub-intake port 111, the first stock hole 131 and the first feeding and discharging hole 121 is all in the same plane vertical with directions X; The center line in the center line in the center line of the second sub-intake port 112, the second stock hole 132 and the second feeding and discharging hole 122 is all in another plane vertical with directions X.
The external frame integral body of spool 2 is cylindrical structure, and form the first stock passage 21, the second stock passage 22 and a suction passage 23, the first stock passage 21 and the second stock passage 22 are respectively near the two ends of spool 2, and suction passage 23 is between the first stock passage 21 and the second stock passage 22.The import of suction passage 23 is positioned on spool 2 end faces, so that the import of suction passage 23 can corresponding with the sub-intake port 112 of the first sub-intake port 111 or the second and alternately be communicated with in spool 2 sliding processes; The outlet of suction passage 23 is located on the first side wall of spool 2, so that the outlet of suction passage 23 can corresponding with the first feeding and discharging hole 121 or the second feeding and discharging hole 122 and alternately be communicated with in spool 2 sliding processes.
In this example, on the cross section vertical with Flow of Goods and Materials direction, suction passage 23 is circle, and the center line of this passage is a circular arc, forms corresponding arcuate socket; And the import of suction passage 23 and outlet lay respectively on orthogonal two surfaces of spool 2.The structure that adopts arcuate socket, makes material from import enters into suction passage 23, can make full use of himself gravity landing to the outlet of suction passage 23.More specifically, the center line of above-mentioned curved channel can be the circular arc that quadrant is long, can guarantee that like this material enters the fluency that suction passage 23 slides, and makes again spool 2 have simple in structure, manufacturing process feature easily.Certainly, above-mentioned suction passage 23 can also adopt the curved channel of other shapes.Above-mentioned suction passage 23 is also not limited in above-mentioned arcuate socket, can also adopt by import and start as vertical hole, and then bending is for slope hole is to outlet, and user can select according to actual needs voluntarily.
It should be noted that, the import of the first stock passage 21, the second stock passage 22, outlet are located at respectively on the first relative side and the second side of spool 2; In the first stock passage 21 and the second stock passage 22, the opening relative with the second feeding and discharging hole 122 with the first feeding and discharging hole 121 is called import, and the opening corresponding with the first stock hole 131 and the second stock hole 132 is called outlet.
By suitable driving mechanism, spool 2 is slided with respect to valve body 1, just can make distributing valve change between two states.Below in conjunction with accompanying drawing, illustrate the working procedure under two kinds of different conditions of this distributing valve.
Please refer to Fig. 2-1 and Fig. 4, the figure shows distributing valve that the embodiment of the present invention the provides structure when the first state.At the first state, spool 2 is positioned at first limit position, and now, the import of the first stock passage 21 of spool 2 communicates with the first feeding and discharging hole 121, and its outlet communicates with the first stock hole 131, and the first feeding and discharging hole 121 is communicated with the first stock hole 131.The import of the suction passage 23 of spool 2 communicates with the second sub-intake port 112, and its outlet communicates with the second feeding and discharging hole 122, so that the second sub-intake port 112 communicates with the second feeding and discharging hole 122.Now, second carries cylinder 52 from material container, to suck material by suction passage 23, first carry cylinder 51 can be by stock passage by its inner material pumping to Y-tube 4, by Y-tube 4, be pumped in delivery pipe.
At the first state, keep, after the scheduled time, can making spool 2 move to another limit position along directions X, can make distributing valve be transformed into the second state.
Please refer to Fig. 2-2 and Fig. 4, the figure shows distributing valve that the embodiment of the present invention the provides structure when the second state.At the second state, spool 2 is positioned at second limit position, and now, the import of the second stock passage 22 of spool 2 communicates with the second feeding and discharging hole 122, and its outlet communicates with the second stock hole 132, so that the second feeding and discharging hole 122 communicates with 132 holes, the second stock hole.The import of the suction passage 23 of spool 2 communicates with the first sub-intake port 111, and its outlet communicates with the first feeding and discharging hole 121, so that the first sub-intake port 111 communicates with the first feeding and discharging hole 121.Now, first carries cylinder 51 from material container, to suck material by suction passage 23, second carry cylinder 52 can be by stock passage by its inner material pumping to Y-tube 4, by Y-tube 4, be pumped in delivery pipe.
According to foregoing description, compared with prior art, the distributing valve that the embodiment of the present invention provides only has 2 one slide members of spool, the switching of two limit positions by slide member has realized pumping commutation, there is commutation resistance little, simple in structure, easy for installation, the advantage of reliable performance.In addition, the inner chamber 101 on inner chamber 101 walls of valve body 1 is not limited to lineal shape slideway, can be also cambered way.
According to foregoing description, be appreciated that, it is the structure that inner chamber 101 is offered at cuboid, cuboid middle part that valve body 1 is not limited to external frame, above-mentioned spool 2 is also not limited in cylindrical body, also can be other concrete shapes or structure, according to the difference of valve body 1 and spool 2 shape of cross sections and structure, respective aperture can be arranged on preposition according to actual needs.
According to foregoing description, the first sub-intake port 111 and the second sub-intake port 112 all communicate with material container, and therefore, valve body 1 also can adopt another kind of structure.Please refer to Fig. 3, this figure is in distributing valve provided by the invention, the structural representation of another kind of valve body 1.Compare with the valve body 1 in the distributing valve shown in Fig. 2-1, in this valve body 1, the first sub-intake port 111 and the second sub-intake port 112 merge the microscler intake port 11 of formation.In fact, intake port 11 is not limited to elongated hole, so long as intake port 11 has suitable size, at distributing valve, during in the first state and the second state, can communicate with the import of suction passage 23, just can provide prerequisite for the suction of corresponding conveying cylinder.
As shown in Figure 4, a kind of embodiment structural representation that Fig. 4 is pumping system provided by the present invention.The present invention also provides a kind of pumping system, comprises that hopper 3, first carries cylinder 51,, second carry cylinder 52, distributing valve, commutation driving mechanism and Y-tube 4.Distributing valve adopts distributing valve as above, and valve body 1 is arranged at hopper 3 bottoms, and the material spilling hole of hopper 3 and the intake port of distributing valve 11 communicate; First carries cylinder 51,, second carry cylinder 52 to communicate with the first feeding and discharging hole 121, the second feeding and discharging hole 122 respectively, the first material feeding mouth 41 of Y-tube 4, the second material feeding mouth 42 communicate with the first stock hole 131, the second stock hole 132 respectively; Commutation driving mechanism is connected with spool 2, to drive spool 2 to slide with respect to valve body 1.Because above-mentioned distributing valve has above-mentioned technique effect, comprise that the pumping system of this distributing valve also has corresponding technique effect.In addition, can effectively improve pumping system suction, reduce pumping resistance.
Concrete structure about commutation driving mechanism, can have multiple choices.Particularly, above-mentioned commutation driving mechanism can be telescopic oil cylinder, and the flexible direction of telescopic oil cylinder is along the longitudinal center line of spool 2.Certainly, above-mentioned commutation driving mechanism, except adopting the structure of telescopic oil cylinder, can also be also other driving mechanisms.
The present invention also provides a kind of pumping machine, comprises pumping system and chassis, and pumping system is arranged on chassis, and wherein pumping system adopts pumping system as above.
Because above-mentioned pumping system has above-mentioned technique effect, therefore, comprise that the pumping machine of this pumping system also should have identical technique effect, do not repeat them here.
Above a kind of pumping machine provided by the present invention, pumping system and distributing valve thereof are described in detail.Applied specific case herein principle of the present invention and mode of execution are set forth, above embodiment's explanation is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (10)
1. a distributing valve for pumping system, comprises valve body (1); It is characterized in that, also comprise spool (2), be provided with and can hold described spool (2) inner chamber (101) in axial sliding in described valve body (1), the wall of described inner chamber (101) matches with the outer circumferential face of described spool (2); The intake port (11), the first feeding and discharging hole (121), the second feeding and discharging hole (122), the first stock hole (131) and the second stock hole (132) that are all communicated to inner chamber (101) are set on described valve body (1); Described spool (2) the first stock passage (21), the second stock passage (22) are set and be positioned at described the first stock passage (21) and described the second stock passage (22) between suction passage (23);
When import, the outlet of described suction passage (23) communicate with described intake port (11), described the first feeding and discharging hole (121), described the second feeding and discharging hole (122) communicates with described the second stock hole (132) by the second stock passage (22); When import, the outlet of described suction passage (23) communicate with described intake port (11), described the second feeding and discharging hole (122), described the first feeding and discharging hole (121) communicates with described the first stock hole (131) by the first stock passage (21).
2. the distributing valve of pumping system according to claim 1, is characterized in that, described intake port (11) is an elongated hole.
3. the distributing valve of pumping system according to claim 1, is characterized in that, described intake port (11) comprises the first sub-intake port (111) and the second sub-intake port (112); Described the first feeding and discharging hole (121) communicates with described intake port (11) and communicates with described the first sub-intake port (111) for described the first feeding and discharging hole (121); Described the second feeding and discharging hole (122) communicates with described intake port (11) and communicates with described the second sub-intake port (112) for described the second feeding and discharging hole (122).
4. the distributing valve of pumping system according to claim 1, is characterized in that, the cross section of the fitting surface between the wall of described inner chamber (101) and the outer circumferential face of described spool (2) is circular.
5. the distributing valve of pumping system according to claim 1, is characterized in that, the import of described suction passage (23) is positioned at the end face of described spool (2), corresponding with described intake port (11); Its outlet is positioned at the sidewall of described spool (2), corresponding with described the first feeding and discharging hole (121) or described the second feeding and discharging hole (122).
6. the distributing valve of pumping system according to claim 5, is characterized in that, the cross section of described suction passage (23) is circular, and its center line is circular arc.
7. the distributing valve of pumping system according to claim 6, is characterized in that, the circular arc that the center line of described suction passage (23) is quadrant.
8. a pumping system, comprise hopper (3), at least two conveying cylinders (51,52), at least one distributing valve and at least one commutation driving mechanism, it is characterized in that, described distributing valve adopts the distributing valve as described in claim 1-7 any one, described valve body (1) is arranged at described hopper (3) bottom, and the material spilling hole of described hopper (3) communicates with the intake port (11) of described valve body (1); Described commutation driving mechanism is connected with described spool (2).
9. pumping system according to claim 8, is characterized in that, described commutation driving mechanism is telescopic oil cylinder, and described telescopic oil cylinder stretches along the longitudinal center line of described spool (2).
10. a pumping machine, comprises pumping system and chassis, and described pumping system is arranged on chassis, it is characterized in that, described pumping system is the pumping system described in claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110329970.2A CN102410204B (en) | 2011-10-26 | 2011-10-26 | Pumping machine, pumping system and distribution valve thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110329970.2A CN102410204B (en) | 2011-10-26 | 2011-10-26 | Pumping machine, pumping system and distribution valve thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN102410204A CN102410204A (en) | 2012-04-11 |
| CN102410204B true CN102410204B (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110329970.2A Active CN102410204B (en) | 2011-10-26 | 2011-10-26 | Pumping machine, pumping system and distribution valve thereof |
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| CN (1) | CN102410204B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4343598A (en) * | 1980-03-14 | 1982-08-10 | Friedrich Wilh. Schwing Gmbh | Viscous material pump, particularly for concrete |
| US5360321A (en) * | 1990-07-03 | 1994-11-01 | Putzmeister-Werk Maschinenfabrik Gmbh | Feeding reservoir for two-cylinders thick-matter pumps |
| CN1425852A (en) * | 2003-01-13 | 2003-06-25 | 孙梓华 | Distribution valve for concrete transport pump |
| CN1946937A (en) * | 2004-02-26 | 2007-04-11 | 施维英集团公司 | Thick matter piston pump |
| CN102127969A (en) * | 2010-12-16 | 2011-07-20 | 三一重工股份有限公司 | Material conveying system and conveying pipe switching device thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100606203B1 (en) * | 2004-04-19 | 2006-07-31 | 주식회사 디앤에스 | A concrete-mortar transfer system of concrete pump car |
-
2011
- 2011-10-26 CN CN201110329970.2A patent/CN102410204B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4343598A (en) * | 1980-03-14 | 1982-08-10 | Friedrich Wilh. Schwing Gmbh | Viscous material pump, particularly for concrete |
| US5360321A (en) * | 1990-07-03 | 1994-11-01 | Putzmeister-Werk Maschinenfabrik Gmbh | Feeding reservoir for two-cylinders thick-matter pumps |
| CN1425852A (en) * | 2003-01-13 | 2003-06-25 | 孙梓华 | Distribution valve for concrete transport pump |
| CN1946937A (en) * | 2004-02-26 | 2007-04-11 | 施维英集团公司 | Thick matter piston pump |
| CN102127969A (en) * | 2010-12-16 | 2011-07-20 | 三一重工股份有限公司 | Material conveying system and conveying pipe switching device thereof |
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| Publication number | Publication date |
|---|---|
| CN102410204A (en) | 2012-04-11 |
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