CN101410619A - Piston pump for thick matter - Google Patents
Piston pump for thick matter Download PDFInfo
- Publication number
- CN101410619A CN101410619A CNA200780011201XA CN200780011201A CN101410619A CN 101410619 A CN101410619 A CN 101410619A CN A200780011201X A CNA200780011201X A CN A200780011201XA CN 200780011201 A CN200780011201 A CN 200780011201A CN 101410619 A CN101410619 A CN 101410619A
- Authority
- CN
- China
- Prior art keywords
- cylinder
- reciprocating pump
- carrying
- annular
- described reciprocating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention relates to a piston pump for thick matter, in particular for high-solids sewage sludge, coal sludge and concrete. The piston pump has at least one delivery cylinder (16) which contains a motor-driven or hydraulically driven delivery piston (20) and which has an orifice (12) which communicates alternately with the interior of a material feed container (10) and with a pressure delivery line (30) in a slide-controlled manner in accordance with the movement of the delivery piston (20). In order to significantly increase the degree of filling of the at least one delivery cylinder (16), an annular nozzle (32) opening into the delivery cylinder (16) in the region of the orifice (12) is provided, and this annular nozzle (32) is connected to an external pressure line (34) to which a lubricant can be admitted.
Description
Technical field
The present invention relates to a kind of reciprocating pump that is used for mud, comprise the conveying cylinder that at least one comprises an electronic or hydraulically powered conveyor piston, this conveying cylinder has a port, and the mode that this port is controlled with guiding valve according to the motion of conveyor piston alternately is communicated with the inside of a feeding container with a head conduit.
Background technique
The reciprocating pump of this pattern is used to carry the solid-liquid mixture with high solid deal, for example sedimentation mud, coal slime slurry, biological pug or concrete.Such mud has a big internal friction, thereby carries the filling degree of cylinder often to feel not enough in aspiration procedure.Known in the reciprocating pump of this pattern on the other hand (EP-B-633863) adds an oiling agent between mud channel and the head conduit wall on the input end of wall friction at head conduit in order to reduce when the conveying of mud.This realizes usually continuously and with feed flow is proportional quantitatively, consequently, forms a boundary film between inner tube wall and mud channel, can reduce discharge pressure whereby.Because lubricating film must be gone into the lubricant injection that replenishes in the head conduit with certain interval along carrying the highway section to disappear gradually.In order to improve the filling degree of carrying cylinder, a prepressing device is set in the zone of feeding container usually, borrow it fill pressure can be improved at least 1 crust.But this is not enough under many circumstances.
Summary of the invention
Setting out thus the objective of the invention is to, and improves the known reciprocating pump that is used for mud targetedly, also can improve the filling degree of carrying in the cylinder under the situation of its high solid deal in mud materials significantly even make.
In order to reach this purpose, the characteristics combination of explanation in the suggestion claim 1.Draw favourable form of implementation of the present invention and further constitute by each dependent claims.
, promptly be provided with one and feed the ring nozzle of carrying cylinder in the zone of port especially based on such conception according to the solution of the present invention, this ring nozzle is connected on the pressure piping of an outside, and wherein pressure piping can load an oiling agent via a high-pressure service pump.Advantageously pressure piping is connected on the annular pass of a feeding ring nozzle via a hole that is provided with in the port zone of carrying cylinder.
The form of implementation of a preferred construction of the present invention is set, carry cylinder to have an outer shroud, this outer shroud has at least one an annular pass of leading to ring nozzle is connected hole on the pressure piping outside, wherein the annular pass in the inboard by carry cylinder or one limit and limit by an internal surface of outer shroud in the outside with the outer surface of the interior ring of the axial adjacency of conveying cylinder.Meet the destination described in ring embed in the groove that inwardly opens wide of outer shroud and with its common annular pass and ring nozzle of limiting.Interior ring advantageously is clamped between two opposed facing ring surfaces carrying annular solid cylinder and the outside with a flange back side, that radially protrude this.
In order to ensure the uniform distribution of mud along circumference, the annular pass meets the destination and has at least one annular cross section widening portion.Be advantageously provided the cross section widening portion of the annular that two each intervals are arranged.
According to of the present invention one preferred form of implementation, be provided with a pair of conveyor piston in carrying cylinder the position and/or the control gear of stroke direction response and one that in pressure piping, be provided with, to the control valve of the output signal response of control gear, this control valve is opened when the aspiration stroke of conveyor piston and was closed before its compression stroke.But control valve meets the destination to this constitutes the selector valve of controlling via the preferred magnetic force of conveyor piston.
Of the present invention one preferred form of implementation is set, and two conveying cylinders that have a ring nozzle in its port zone respectively are set, and their ring nozzle can be via the control valve supply of lubricant when each aspiration stroke of the conveyor piston of push-pull mode control.
The invention still further relates to a kind of method in order to the reciprocating pump used of operation mud, wherein alternately in an aspiration stroke, mud materials sucked one during in the conveying cylinder that a side is opened wide and in the compression stroke that is right after from carrying cylinder to be pressed into the head conduit.In order to improve the filling degree of carrying cylinder significantly,, when each aspiration stroke, one lubricant injection is gone into to carry cylinder according to the present invention's suggestion.Oiling agent advantageously is injected at mud materials and carries in the border region between the cylinder internal surface to this, and along its wholecircle week.For fear of the emptying unintentionally of the input pipeline of oiling agent, in the process of compression stroke, advantageously interrupt lubricant injection.With an overpressure injection oiling agent with respect to the mud that is provided with in the conveying cylinder.Injection pressure meets the destination greater than 50 crust, preferred about 100 crust, and the precompression in the mud materials advantageously is about 2 crust when aspiration stroke.
Of the present invention one preferred form of implementation is set, under the situation of one twin-tub-reciprocating pump, be controlled at first and second pistons of carrying in the cylinders by implementing an aspiration stroke and a compression stroke, wherein when each aspiration stroke, one lubricant injection gone into respectively to carry in the cylinder and during corresponding compression stroke and interrupting lubricant injection with push-pull mode.
Utilize measure of the present invention in mud, to reach the significant improvement of carrying the filling degree in the cylinder especially with high solid deal.The lubricant film that forms in this external conveying cylinder is brought in the head conduit, thereby at a lubricant injection that and then need not to replenish in first pipe section of slurry pump.Just in the head conduit that has greater than the length of 50 to 100m length, can the lubricant injection that replenish be gone in the head conduit at spacing place from slurry pump.Though only when aspiration stroke, lubricant injection is gone into to carry in the cylinder, should realize lubricant injection continuously to head conduit.
Description of drawings
Below the embodiment shown in simplifying in the accompanying drawings by illustrate in greater detail the present invention.Wherein:
The plan view of twin-tub-reciprocating pump that Fig. 1 mud is used is used to be connected a conveyance conduit;
Fig. 2 a and b press the plan view of amplification of twin-tub-reciprocating pump of Fig. 1 and the sectional view of amplification, do not have feeding container;
Fig. 3 presses the part of amplifying in the sectional view of Fig. 2 b;
The section in the port zone of Fig. 4 one conveying cylinder is with respect to the enlarged view of Fig. 3.
Embodiment
Twin-tub-reciprocating pump shown in simplifying among Fig. 1 is given for the mud of carrying a large amount of solid matters, for example has the mud of part to fall mud, spiral shell powder mud or concrete.
Reciprocating pump consists essentially of a feeding container 10, two and is carrying in the cylinder 16 in connect on the feeding container 10 conveying cylinder 16, two via cinclides 14 with the port 12 of its end face and can carry the water tank 22 of setting between the cylinder 16 in each drive cylinder 18 and each via the conveyor piston 20 and that hydraulic drive cylinder 18 drives with push-pull mode.One tubular-type slide valve 21 is set in feeding container 10, this tubular-type slide valve alternately is connected in the port 12 of carrying cylinder with its import 26, the piston of this conveying cylinder is implemented a compression stroke and the port 12 of open another conveying cylinder, this another carry the piston of cylinder to implement an aspiration stroke, and its outlet 28 is connected on the unshowned head conduit via the pressure sleeves 30 that are provided with on the feeding container 10.Tubular-type slide valve 24 has return bend one deflectable in feeding container 10, the bending of S shape in the embodiment shown in fig. 1.Correspondingly mud materials enters the conveying cylinder 16 that relates to via the port 12 that opens wide by applying a precompression in case of necessity from the inside of feeding container 10 when each aspiration stroke, carries the mud materials that is in the there in cylinder 16 to be pressed in the head conduit that is right after via the return bend and the pressure sleeve 30 of tubular-type slide valve 24 by implementing a compression stroke by conveyor piston 20 at another simultaneously.
Characteristics of the present invention are, a ring nozzle 32 is set in the zone of port 12, this ring nozzle via each pressure piping 34, each hole 36 and an annular pass 38 can one about 50 to 100 the crust pressure under supply of lubricant.In order to form annular pass 38 and ring nozzle 30, axially manage 40 in the adjacency one in the zone at port 12 on the conveying cylinder 16, this interior Guan Youyi is carrying outer tube 42 overlap joints of tightening on the cylinder 16.Pipe 40 has a flange 44 that radially protrudes for this reason, and between the ring surface 48 of its ring surface 46 that is clamped in outer tube 42 and the end face of carrying cylinder 16, and it is unlimited that ring nozzle 32 and annular pass 38 are kept between interior pipe and outer tube.Each hole 36 that oiling agent is supplied with is arranged in the outer tube 42.Interior Guan Zaiqi limits on the internal surface of annular pass 38 has two circular grooves, they form a cross section widening portion 50 and the oiling agent that guarantees to flow out by ring nozzle 32 along the uniform distribution of circumference.
In order to carry the oiling agent of cylinder 16 to supply with to each, control the unshowned control gear of an outside like this, promptly only when aspiration stroke, lubricant injection is gone into to carry cylinder.Oiling agent enters at mud materials there and carries in the border region between the cylinder internal surface, thereby because the sliding friction that reduces improves the filling degree.Experiment shows, utilizes at least 25% the improvement that can reach the filling degree according to measure of the present invention in the sedimentation mud of a large amount of solid matters.Thereby oiling agent enters pressure piping with mud materials and also reduces sliding friction there and be reduced to the discharge pressure that material is carried to be needed when the compression stroke that is right after.In the process of compression stroke, always interrupt lubricant injection.Avoid thus because the mud materials that flows through causes the danger of finding time of lubricant pipe.
Be summarized as follows: the present invention relates to a kind ofly to be used for mud, especially for the sedimentation mud that is rich in solid matter, coal slime slurry and concrete reciprocating pump.Reciprocating pump has at least one conveying cylinder 16 that comprises a conveyor piston 20 electronic or that hydraulically drive, described conveying cylinder has a port 12, and the mode that this port is controlled with guiding valve according to the motion of conveyor piston 20 alternately is communicated with the inside of a feeding container 10 with a head conduit 30.For improve significantly described at least one carry the filling degree of cylinder 16, a ring nozzle 32 that feeds conveying cylinder 16 in the zone of port 12 is set, this ring nozzle is connected one and can loads on the pressure piping 34 of outside of oiling agent.
Claims (18)
1. the reciprocating pump that is used for mud, comprise the conveying cylinder (16) that at least one comprises a conveyor piston (20) electronic or that hydraulically drive, described conveying cylinder has a port (12), and the mode that this port is controlled with guiding valve according to the motion of conveyor piston (20) alternately is communicated with the inside of a feeding container (10) with a head conduit (pressure sleeve 30); It is characterized in that be provided with one and feed the ring nozzle of carrying in the cylinder (16) (32) in the zone of port (12), this ring nozzle is connected at least one outside pressure piping (34).
2. according to the described reciprocating pump of claim 1, it is characterized in that pressure piping (34) can load oiling agent via a high-pressure service pump.
3. according to the described reciprocating pump of claim 2, it is characterized in that pressure piping (34) is connected on the annular pass (38) that feeds in the ring nozzle (32) via a hole (36) that is provided with in the port zone of carrying cylinder (16).
4. according to one of claim 1 to 3 described reciprocating pump, it is characterized in that, carry cylinder (16) to have the annular solid (42) of an outside, this annular solid has at least one an annular pass (38) of leading to ring nozzle (32) is connected hole (36) on the pressure piping (34) outside.
5. according to claim 3 or 4 described reciprocating pumps, it is characterized in that annular pass (38) outer surface by carrying cylinder or limits with the outer surface of the interior pipe (40) of carrying the axial adjacency of cylinder and the one internal surface qualification of the annular solid (42) by described outside in the outside in the inboard.
6. according to one of claim 1 to 5 described reciprocating pump, it is characterized in that, carrying upward pipe (40) in end face connection one of cylinder (16), limit annular pass (38) and ring nozzle (32) jointly in the groove that inwardly opens wide of the annular solid (42) of pipe embedding outside and with this annular solid in this.
7. according to one of claim 3 to 6 described reciprocating pump, it is characterized in that annular pass (38) have at least one annular cross section widening portion (50).
8. according to the described reciprocating pump of claim 7, it is characterized in that annular pass (38) have the cross section widening portion (50) of the annular that two each intervals are arranged.
9. according to one of claim 1 to 8 described reciprocating pump, it is characterized in that, be provided with one the position and/or the control gear and of the stroke direction response control valve that in pressure piping (34), be provided with, that an output signal of control gear is responded of conveyor piston (20) in carrying cylinder (16).
10. according to the described reciprocating pump of claim 9, it is characterized in that the control valve that is provided with is opened and closed when the aspiration stroke of conveyor piston (20) via control gear before its compression stroke in pressure piping (34).
11., it is characterized in that control valve constitutes via conveyor piston (20) but the selector valve of preferred magnetic force control according to claim 9 or 10 described reciprocating pumps.
12. according to one of claim 1 to 11 described reciprocating pump, it is characterized in that, two conveying cylinders (16) that have a ring nozzle (32) in its port zone (12) respectively are set, the ring nozzle of described conveying cylinder (32) but when each aspiration stroke of the conveyor piston (20) of push-pull mode control, can load oiling agent via control valve.
13. according to one of claim 5 to 12 described reciprocating pump, it is characterized in that interior pipe (40) is clamped between two opposed facing ring surfaces (46,48) of carrying cylinder annular solid (16) and the outside (42) with flange (a 44) back side, that radially protrude.
14. be used to operate the method for the reciprocating pump that a mud uses, wherein alternately in an aspiration stroke, mud materials sucked one during in the conveying cylinder (16) that a side is opened wide and in the compression stroke that is right after from carrying cylinder to be pressed into the head conduit; It is characterized in that, when each aspiration stroke, one lubricant injection is gone into to carry in the cylinder (16).
15. in accordance with the method for claim 14, it is characterized in that, go into lubricant injection at mud materials and carry in the border region between the cylinder internal surface.
16. according to claim 14 or 15 described methods, it is characterized in that, along the wholecircle week shot lubrication agent of carrying the cylinder internal surface.
17. according to one of claim 14 to 16 described method, it is characterized in that, during compression stroke, interrupt lubricant injection.
18., wherein be controlled at first piston of carrying in the cylinder and the second conveying cylinder by implementing an aspiration stroke and a compression stroke with push-pull mode according to one of claim 14 to 17 described method; It is characterized in that, when each aspiration stroke, lubricant injection gone into respectively to carry in the cylinder and during corresponding compression stroke and interrupting lubricant injection.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006016083.5 | 2006-04-04 | ||
| DE102006016083A DE102006016083A1 (en) | 2006-04-04 | 2006-04-04 | Piston pump for thick materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101410619A true CN101410619A (en) | 2009-04-15 |
Family
ID=38102553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200780011201XA Pending CN101410619A (en) | 2006-04-04 | 2007-03-23 | Piston pump for thick matter |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20100232996A1 (en) |
| EP (1) | EP2002121B1 (en) |
| JP (1) | JP5202512B2 (en) |
| CN (1) | CN101410619A (en) |
| AT (1) | ATE484676T1 (en) |
| CA (1) | CA2647794A1 (en) |
| DE (2) | DE102006016083A1 (en) |
| WO (1) | WO2007115665A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104266061A (en) * | 2014-09-19 | 2015-01-07 | 中建三局集团有限公司 | Concrete conveying pipeline lubricating device and method |
| CN109372712A (en) * | 2018-11-06 | 2019-02-22 | 能诚集团有限公司 | Pumping installations |
| CN112423605A (en) * | 2018-07-18 | 2021-02-26 | 株式会社日冷食品 | Quantitative dividing unit, quantitative dividing method and food manufacturing method |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104119265B (en) | 2009-06-03 | 2016-07-13 | 富士胶片株式会社 | Photo-electric conversion element, its preparation method, optical sensor, imaging device and driving method thereof |
| KR101083802B1 (en) * | 2009-06-29 | 2011-11-18 | 주식회사 맥스텍 | Method of supplying Liquid |
| JP5680324B2 (en) * | 2010-03-30 | 2015-03-04 | 三菱重工環境・化学エンジニアリング株式会社 | Solid material pumping apparatus and solid material pumping method |
| BR112014019410A8 (en) | 2012-02-07 | 2017-07-11 | Commw Scient Ind Res Org | DEVICE AND METHOD FOR REDUCING THE FRICTION OF A VISCOUS FLUID FLOW IN A DUCT |
| US10648462B2 (en) * | 2013-10-29 | 2020-05-12 | Thermtech Holdings As | System for feeding and pumping of less pumpable material in a conduit line |
| US9216536B2 (en) | 2014-01-17 | 2015-12-22 | Kolmar Laboratories, Inc. | Piston-based extrusion for viscous products |
| CN111246932B (en) * | 2017-11-07 | 2022-06-24 | Sabic环球技术有限责任公司 | Piston system and high pressure homogenizer using the same |
| FR3105252B1 (en) | 2019-12-23 | 2023-01-20 | Syctom Lagence Metropolitaine Des Dechets Menagers | Device for injecting an organic resource under high pressure |
| FR3105207B1 (en) | 2019-12-23 | 2022-04-29 | Syctom Lagence Metropolitaine Des Dechets Menagers | Device for high pressure injection of a wet mixture |
| FR3112089B1 (en) | 2020-07-02 | 2024-01-19 | Commissariat Energie Atomique | DEVICE FOR INJECTING AN EFFLUENT UNDER HIGH PRESSURE |
| WO2022194332A1 (en) * | 2021-03-17 | 2022-09-22 | Circlia Nordic Aps | Pumping system for thermochemical biomass converters |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2330781A (en) * | 1941-05-28 | 1943-09-28 | Standard Oil Dev Co | Conveying fluids containing solids |
| NL129372C (en) * | 1960-08-08 | |||
| JPS5066204U (en) * | 1973-10-18 | 1975-06-14 | ||
| US4510958A (en) * | 1982-05-06 | 1985-04-16 | E. I. Du Pont De Nemours And Company | Apparatus and method for transferring a Bingham solid through a long conduit |
| DE3605723A1 (en) * | 1986-02-22 | 1987-08-27 | Uhde Gmbh | Method and device for conveying solid/liquid mixtures |
| JPS63121782U (en) * | 1987-02-02 | 1988-08-08 | ||
| US5002025A (en) * | 1990-06-18 | 1991-03-26 | Crouse William H | Lubricating oil permeable cylinder wall ring |
| DE4211138A1 (en) * | 1992-04-03 | 1993-10-07 | Putzmeister Maschf | Device for conveying thick solids |
| JPH0625563U (en) * | 1992-09-01 | 1994-04-08 | 石川島建機株式会社 | Swing valve type viscous fluid pump valve ring |
| DE59305912D1 (en) * | 1993-02-02 | 1997-04-24 | Putzmeister Maschf | METHOD FOR CONVEYING PRE-CRUSHED METAL SCRAP OR THE SAME SOLID CONTAINING SOLIDS |
| DE10036202A1 (en) * | 2000-07-24 | 2002-02-07 | Putzmeister Ag | Slurry pump |
| JP4083470B2 (en) * | 2002-05-30 | 2008-04-30 | 古河機械金属株式会社 | Sliding part lubrication mechanism of piston pump backflow prevention device |
-
2006
- 2006-04-04 DE DE102006016083A patent/DE102006016083A1/en not_active Withdrawn
-
2007
- 2007-03-23 WO PCT/EP2007/002572 patent/WO2007115665A1/en active Application Filing
- 2007-03-23 DE DE502007005346T patent/DE502007005346D1/en active Active
- 2007-03-23 JP JP2009503453A patent/JP5202512B2/en not_active Expired - Fee Related
- 2007-03-23 AT AT07723523T patent/ATE484676T1/en active
- 2007-03-23 US US12/225,775 patent/US20100232996A1/en not_active Abandoned
- 2007-03-23 CN CNA200780011201XA patent/CN101410619A/en active Pending
- 2007-03-23 EP EP07723523A patent/EP2002121B1/en not_active Not-in-force
- 2007-03-23 CA CA002647794A patent/CA2647794A1/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104266061A (en) * | 2014-09-19 | 2015-01-07 | 中建三局集团有限公司 | Concrete conveying pipeline lubricating device and method |
| CN112423605A (en) * | 2018-07-18 | 2021-02-26 | 株式会社日冷食品 | Quantitative dividing unit, quantitative dividing method and food manufacturing method |
| CN112423605B (en) * | 2018-07-18 | 2023-02-21 | 株式会社日冷食品 | Quantitative dividing unit, quantitative dividing method and food manufacturing method |
| CN109372712A (en) * | 2018-11-06 | 2019-02-22 | 能诚集团有限公司 | Pumping installations |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2002121B1 (en) | 2010-10-13 |
| ATE484676T1 (en) | 2010-10-15 |
| CA2647794A1 (en) | 2007-10-18 |
| DE502007005346D1 (en) | 2010-11-25 |
| WO2007115665A1 (en) | 2007-10-18 |
| JP5202512B2 (en) | 2013-06-05 |
| DE102006016083A1 (en) | 2007-10-11 |
| JP2009532616A (en) | 2009-09-10 |
| US20100232996A1 (en) | 2010-09-16 |
| EP2002121A1 (en) | 2008-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101410619A (en) | Piston pump for thick matter | |
| CN101435422B (en) | Abrasion-proof plunger pump | |
| CA2940124C (en) | Hydraulically driven bellows pump | |
| CN102536787A (en) | Pumping mechanism and material pumping equipment comprising same | |
| US7828474B2 (en) | Shot pump and variable-speed-type two-liquid metering and mixing apparatus | |
| CN105927495A (en) | Constant-flowing filling pump for glue used for producing anchoring agent | |
| CN108730148A (en) | A kind of double plunger fracturing pump of hydraulic-driven | |
| CN101782054A (en) | Paste transfer pump | |
| KR101914497B1 (en) | High viscosity crude oil transfer device with syringe pump type | |
| CN109253117B (en) | Hydraulic push rod driving system | |
| CN210440173U (en) | Pasty material conveying device and engineering vehicle | |
| CN209012151U (en) | A kind of hydraulic push rod drive system | |
| US5281113A (en) | Thick materials pump with paired, preferably parallel feed cylinders which alternatingly deliver and intake | |
| CN105972235A (en) | Carriage slide valve, delivery pump comprising carriage slide valve and pump truck | |
| CN106545493A (en) | A kind of distributing valve and the delivery pump using this distributing valve | |
| CN109989900B (en) | Paste material conveying device, control method thereof and engineering vehicle | |
| CN209908750U (en) | Pneumatic material pumping pump | |
| CN209818583U (en) | Hydraulic clutch | |
| HU176079B (en) | Machine for delivering and applying plastering materials | |
| CN117212090A (en) | Graphene pumping system with buffer function and control method | |
| JP5680324B2 (en) | Solid material pumping apparatus and solid material pumping method | |
| JP2004225676A (en) | Reciprocating double row type positive displacement pump | |
| CN117206040A (en) | Graphene stripping and crushing equipment | |
| CN109058525A (en) | A kind of single outlet streamline valve body device of pumpable compressibility material | |
| JPH06101633A (en) | Structure for fixed plate and sliding plate in slurry force feed pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |