CN102606442B - Piston pump for pumping slurry shaped materials, in particular concrete, and concrete pump - Google Patents
Piston pump for pumping slurry shaped materials, in particular concrete, and concrete pump Download PDFInfo
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- CN102606442B CN102606442B CN201210075167.5A CN201210075167A CN102606442B CN 102606442 B CN102606442 B CN 102606442B CN 201210075167 A CN201210075167 A CN 201210075167A CN 102606442 B CN102606442 B CN 102606442B
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Abstract
The invention provides a piston pump for pumping slurry shaped materials, in particular concrete. The piston pump comprises at least one transfer cylinder; a concrete piston capable of moving in the axial direction is arranged in the transfer cylinder, wherein a radial annular clearance is left between the transfer cylinder and the concrete piston in advance; a second end face of the concrete piston is connected with a driving mechanism by a piston rod. One elastic annular element is arranged on each of two end faces of the concrete piston; the annular elements are communicated with the annular clearance, and are bonded on the inner surface of the transfer cylinder. In order to reduce the wearing between the transfer cylinder and the concrete piston during the pumping process of the high pressure pump, an oil scraping ring is arranged on a first end face of the concrete piston, a pressure seal is arranged on the second end face of the concrete piston, the oil scraping ring and the pressure seal synchronously limit the annular clearance in the axial direction so as to form an annular cavity capable of containing the fluid. A certain amount of fluid is always injected in the annular cavity, and the fluid is pumped by the instant pressure of material pumping process at the side of the first end face of the concrete piston.
Description
Technical field
The present invention relates to engineering machinery field, particularly relate to a kind of pumping mud shape material, especially concrete reciprocating pump and concrete pump.
Background technique
Reciprocating pump is used for the industrial mud shaped material of pumping, such as concrete, and under normal circumstances, reciprocating pump has two conveying cylinders; At suction stroke, conveying cylinder is communicated with hopper, can from suction in hopper; At stock stroke, conveying cylinder can be communicated with cloth tube by distributing valve.The concrete piston of conveying cylinder is connected with main oil cylinder piston by a public piston rod, realizes reciprocatory motion by master cylinder driving.Because concrete piston directly contacts with material, therefore with conveying cylinder internal surface, strict requirement is proposed to the sealing of concrete piston, and requires as far as possible little friction.For reducing wearing and tearing, concrete piston is generally be placed in wear-resistant conveying cylinder of modified sclerosis or height chromium plating process.Except metalwork, concrete piston also has the rubber sleeve of sulfuration.Respectively there is a ring-type element at the two ends of concrete piston, thus at suction stroke and stock stroke, the two ends of concrete piston all can reach sealing effect.But the speed of pumping is faster, be located at concrete piston also faster near the ring-type element wearing and tearing of material end face, therefore, this ring-type element carries out cleaning type scraping by the lip of himself to conveying cylinder surfaces, large owing to rubbing, the elasticity pressurized position at this ring-type element rear portion is tending towards dry, thus cause dry type to be worn and torn, and under high pressure to-and-fro motion, the lip of ring-type element will soon thin down because of wearing and tearing, now sand-like material may infiltrate in toroidal cavity, causes the damage of concrete piston.
For avoiding above-mentioned situation, existing conventional way is: the yarn fabric of ring-type element surrounding or man-made fabric are carried out vulcanizing treatment, makes the fluid in water tank penetrate in toroidal cavity, reduces dry type wearing and tearing.But under high-pressure situations, this way poor effect, because the material with wearing and tearing infiltrated can cause wearing and tearing to conveying cylinder; And also driving force is had higher requirement simultaneously.
Therefore, to inject the flush fluid in such as water tank away from the end face of material from concrete piston.This flush fluid rinses except the mud shaped material of infiltration except can be used for, and also has cooling action: not only can cool driving liquid, also can cool the frictional heat between concrete piston and conveying cylinder, and the fricative heat of conveying cylinder casing wall is taken away by pumping material.
Summary of the invention
The object of the present invention is to provide a kind of reciprocating pump, the wearing and tearing between concrete piston and conveying cylinder can be reduced.Spatially can be realized sealing and the scraping effect of concrete piston at function and structure by ingenious suitable structural design simultaneously.
For solving this technical problem, first the present invention advises:
A kind of reciprocating pump, comprise at least one conveying cylinder, being provided with in conveying cylinder can the concrete piston of axial motion, between concrete piston and conveying cylinder, there is annular space, second end face of concrete piston is connected with driving mechanism by piston rod, first end face of concrete piston is provided with scraper ring, second end face of concrete piston is provided with pressure seal, described scraper ring and described pressure seal carry out spacing to annular space, form toroidal cavity, all the time a certain amount of fluid is injected with in described toroidal cavity, described fluid is by the instantaneous pressure press-in of the pumping material of concrete piston first end face side.
Further, guide ring is provided with between described scraper ring and described pressure seal; Described guide ring communicates with annular space, and guide ring, with open channel, realizes fluid circulation in the axial direction.
Further, described scraper ring by can bearing pressure, flexible lip forms; The front end of lip contacts with pumping material, and the rear end of lip contacts with toroidal cavity.
Further, the lip of described scraper ring can fit in conveying cylinder surfaces, is provided with buffer memory chamber between scraper ring and the first end face of concrete piston, and this buffer memory chamber is communicated with toroidal cavity.
Further, described toroidal cavity has at least one fluid passage that can temporarily communicate with the external world, and described fluid passage is provided with backflow non-return valve.
Further, described concrete piston carries out the to-and-fro motion of suction and stock in conveying cylinder; And conveying cylinder is provided with a first fluid passage that penetrate conveying cylinder casing wall, can inject fluid in toroidal cavity.
Further, described pressure seal comprises is located at seal ring in piston groove and flexible O RunddichtringO, and O RunddichtringO is used for the seal ring that pretension can communicate with annular space.
Further, described pressure seal can the axial displacement of opposed annular cavity, can inject fluid outside it; The fluid passage of axial clearance and backflow non-return valve is provided with in piston groove.
Further, the first end face center of described concrete piston is provided with space, and being provided with outside space can the diaphragm of perception pumping material pressure.
Further, described scraper ring is positioned at the outer ledge of diaphragm.
Further, described diaphragm carries out spacing to described space, and form the first stroke room being used for containing fluid, described first stroke room is communicated with toroidal cavity.
Further, described concrete piston is provided with receiving cavity, is provided with plunger in described receiving cavity, and by the effect of diaphragm, plunger can move in receiving cavity; Receiving cavity and plunger spacing formation second stroke room, described second stroke room can be communicated with toroidal cavity.
Further, the first described stroke room is communicated with water tank by second fluid passage with the second described stroke room, and is communicated with toroidal cavity by the 3rd fluid passage.
Further, described second fluid passage and/or described 3rd fluid passage are provided with backflow non-return valve.
Further, described plunger is contacted with diaphragm by plunger top board and/or piston spring.
Further, described concrete piston is combined mutually by the piston body that two are separated in the axial direction.
Further, the piston rod of described concrete piston, through the water tank for store fluid, is connected with driving mechanism.
Further, described driving mechanism is at least double-acting oil hydraulic cylinder.
In addition, present invention also offers a kind of concrete pump, comprise the reciprocating pump of above-mentioned any one.
A kind of pumping mud shape material provided by the invention, especially concrete reciprocating pump, has at least one conveying cylinder; Being provided with in conveying cylinder can the concrete piston of axial motion.Wherein, radial ringed gap is provided with between concrete piston and conveying cylinder.Concrete piston second end face is connected with driving mechanism by a piston rod.
An elastic annular element be made up of lip scraper ring is assembled at the first end face of concrete piston; A ring-type element be made up of pressure seal is assembled at the second end face of concrete piston, the spacing formation toroidal cavity of two ring-type elements, be injected with a certain amount of fluid in toroidal cavity, these fluids are be injected into by the instantaneous pressure of concrete piston first end pumping material all the time.Scraper ring is located at concrete piston first end face, with one or more flexible lip.Pressure seal is preferably: the cylinder sleeve type seal ring at least with 1 with " friction factor is little ", such as is made up of artificial material.
When frizing, scraper ring only by band lip works, make the fluid in toroidal cavity and material have identical pressure, therefore scraper ring can fit in conveying cylinder internal surface by means of only the precompression of its resilient radial, thus realizes the effect of scraping and separation of material.The front end of scraper ring lip contacts with pumping material, and rear end contacts with toroidal cavity.
For the guidance quality of Optimal improvements concrete piston, scraper ring and pressure seal axially guide ring is set; This guide ring communicates with toroidal cavity, and with the fluid passage be convenient to fluid and passed through.
Be full of fluid for guaranteeing to remain in toroidal cavity, toroidal cavity is at least temporary transient keep unimpeded with the external world; Preferably on fluid passage, install back flow shutoff valve.Usually, concrete piston to-and-fro motion between suction and stock state.Therefore in suction dislocation place of conveying cylinder, injected in piston by fluid, and flow in toroidal cavity, make each suction stroke, in toroidal cavity, the fluid of seepage realizes supply by fluid passage.
Preferably, when pressure seal has radial and axial displacement in piston groove, preferably an additional O RunddichtringO is as elastic element, for the pressure seal that pretension communicates with annular space.Now, the supply of toroidal cavity inner fluid can be realized by another kind of improved procedure: pressure seal can float at the outer side surface of toroidal cavity and be injected into liquid; And backflow non-return valve exists axial with gap that is radial direction in piston groove.At suction stroke, pumping pressure and toroidal cavity internal pressure are down to below ambient pressure, and pressure seal lifts from its bearing by the lateral fluid making to be under ambient pressure, namely flows in toroidal cavity by pressure seal.
Further, the neutral position of concrete piston first end face is provided with a space; Being provided with one at the end face in space can the diaphragm of perception pumping material pressure.Preferably the ring-type element be made up of scraper ring is deformed into the outer ledge of diaphragm.Can the first stroke room of containing fluid by the spacing formation of diaphragm and space one, the first stroke room can be communicated with toroidal cavity.By this structural change, cylinder sleeve type lip ring can have axial free clearance in piston groove.
Further, arrange a receiving cavity, be provided with plunger in receiving cavity in concrete piston, this plunger, by being located at the effect of the diaphragm outside receiving cavity, is holding indoor moving.Preferably at plunger arranged outside plunger top board, or can be connected with diaphragm by piston spring.Receiving cavity and the common spacing formation second stroke room of plunger, the second stroke room is laid in pond by second fluid passage with fluid and is connected, and is communicated with toroidal cavity by the 3rd fluid passage.Second fluid passage and/or the 3rd fluid passage are provided with backflow non-return valve, in order to ensure reliable pumping effect.
For ease of arrange on concrete piston pressure-driven and suction drive needed for passage, concrete piston of the present invention to be at least interconnected at the piston body of axial separation by two and to form.Due to the stroke motion of concrete piston, the leakage of toroidal cavity inner fluid is inevitable, therefore needs to arrange enough available fluid space, can arrange closed buffer memory chamber between scraper ring and concrete piston first end face.
Accompanying drawing explanation
Fig. 1 is the structural representation of reciprocating pump;
Fig. 2 is the profile of the first mode of execution of concrete piston;
Fig. 3 is the profile of concrete piston the second mode of execution;
Fig. 4 is the profile of the third mode of execution of concrete piston;
Fig. 5 is the profile of concrete piston the 4th kind of mode of execution.
Shown by reference numeral:
Cylinder end face opening 14 hopper carried by 10,10 ' conveying cylinder 12,12 '
16 distributing valve 18 cloth tube 20,20 ' master cylinders
21,21 ' concrete piston 22,22 ' piston rod 24,24 ' main oil cylinder piston
26 water tank 28,28 ' oil pipe 30 oil pipes
32,32 ', 34,34 ' measuring probe 36 annular space
38 scraper ring 40 pressure seal 40 ' seal rings
42 conveying cylinder internal surface 44 toroidal cavities 45,46 carry cylinder cavity volume
48 guide ring 50 open channel 52 lips
54 buffer memory chamber 56 first fluid passage 58 piston grooves
60O RunddichtringO 62 axial clearance 64 radial clearance
65 bearing 66 space 68 diaphragms
70 first radial passage 74, stroke room 72 receiving cavities
76 plunger 78 plunger push rod 80 piston springs
82 second fluid passage 86, stroke room 84 the 3rd second fluid passages
88,90 axial separation face, backflow non-return valve 92 the 4th fluid passages 94
96,98 piston bodies 99 tight a bolt
Embodiment
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1, a kind of pumping mud shape material, especially concrete reciprocating pump, comprises two conveying cylinders 10,10 '; The end face opening 12,12 ' of conveying cylinder can be communicated with hopper at suction stroke S, suction from hopper; Be communicated with cloth tube by distributing valve 16 at pumping stroke D.Conveying cylinder 10,10 ' by master cylinder 20,20 ' hydraulic driving in an asynchronous manner.Therefore concrete piston 21,21 ' is connected respectively by a public piston rod 22,22 ' with main oil cylinder piston 24,24 '.Be provided with water tank 26 between concrete piston and main oil cylinder piston, piston rod 22,22 ' through water tank.Conveying cylinder is communicated with water tank, and the fluid namely in water tank can be injected into the back side of concrete piston 21,21 ', the mud shaped material entering concrete piston can be washed, and play cooling effect simultaneously.
Main oil cylinder piston 24,24 ' by oil pipe 28, and 28 ' is connected with B mouth with A mouth, by the driving of oil hydraulic pump (not shown), achieves the alter least-squares of pressure oil.Main oil cylinder piston 24,24 ' realizes the connection of liquid by oil pipe 30.For realizing orderly control, be all provided with measuring probe 32,32 ', 34,34 ' at the rod chamber of master cylinder and rodless cavity afterbody, for measuring main oil cylinder piston 24, the 24 ' respective displacement.Measuring probe 32, the kinetic characteristic of 32 ', 34,34 ' main oil cylinder piston 24,24 ' when can demonstrate pumping stroke and suction stroke, and when dislocation, provide a digital commutation signal.
Above-mentioned hydraulic drive type concrete piston, also can use mechanical type or electromechanical driving mechanism in principle.
The invention has the advantages that: concrete piston 21,21 ' can play the effect reducing and rub between conveying cylinder, and conveying cylinder 10 can be reduced, the driving force of 10 ', pressure result and sealing effect can not problems of implementation simultaneously in pumping procedure to solve concrete piston, particularly can form the wiper seal of " friction factor is little ".
For simplified characterization, independent below concrete piston 21 and conveying cylinder 10 to be set forth.Two or more embodiments are all provided for twin-tub or multi-cylinder piston pump.
Concrete piston 21 is located in conveying cylinder 10, is reserved with annular space 36 in the axial direction; Be provided with scraper ring 38 at the first end face of concrete piston 21, the second end face of concrete piston 21 is provided with pressure seal 40; Scraper ring 38 and pressure seal 40 fit in the internal surface 42 of conveying cylinder 10, carry out axially spacing, form toroidal cavity 44 to annular space 36.By injecting fluid in toroidal cavity 44, realize the intercommunication of fluid on scraper ring 38 and pressure seal 40.Wherein the first end face of concrete piston refers to the end face near pumping material, and the second end face of concrete piston refers to the end face away from pumping material.
Next different structure of the present invention distortion will be set forth further.Various malformation is all in order to realize the injection of toroidal cavity 44 inner fluid better, and in various example structure, fluid is actually and relies on the pumping material instantaneous pressure acted on concrete piston 21 to be injected into.For realizing the sealing of concrete piston two ends conveying cylinder cavity volume 45,46, concrete piston 21 is equipped with scraper ring 38 and cylinder sleeve type pressure seal 40; Pressure seal 40 can bear the pressure of pumping material.Scraper ring 38 by can bearing pressure, lip 52 that is flexible, that contact with pumping material and the rear portion that is communicated with toroidal cavity 44 form.Scraper ring 38 both achieved scraping function by its flexible radial clearance, the material in conveying cylinder cavity volume 45 can be separated with the fluid of toroidal cavity 44 again.
In the structural representation shown in Fig. 2-Fig. 5, the guide ring 48 in toroidal cavity 44 is communicated with annular space 36.This guide ring 48 realizes fluid circulation in the axial direction by the open channel 50 of himself.Guide ring 48 pairs of concrete pistons lead at the internal surface of conveying cylinder.Scraper ring 38 is communicated with guide ring 48 by open channel 50 with pressure seal 40.
As Fig. 2,3, shown in 5, between scraper ring 38 and the first end face of concrete piston 21, be provided with a buffer memory chamber 54 that is closed, that can expand fluid displacement, this buffer memory chamber 54 is communicated with toroidal cavity 44.Wherein, scraper ring 38 is with the lip 52 that can fit in conveying cylinder internal surface 42; First end face of concrete piston 21 can be communicated with toroidal cavity 44.In addition, as shown in Figure 4, scraper ring can be made up of multistage lip.
In pumping stroke and suction stroke, due to the motion of concrete piston, toroidal cavity 44 inner fluid will inevitably leak from pressure seal 40 and scraper ring 38, therefore should carry out supply again by suitable measure to the fluid in toroidal cavity 44.For this reason, Fig. 2-Fig. 5 provides various structures mode, can make to remain enough fluids in toroidal cavity 44.
By measure probe 32,34, the switching position of the suction/pumping of main oil cylinder piston 24 and concrete piston 21 can be determined.As shown in Figure 2, on conveying cylinder 10, on conveying cylinder corresponding in toroidal cavity 44 width range when the suction being preferable over concrete piston 21 switches to stock, the first fluid passage 56 running through and carry cylinder casing wall, fluid can be injected to toroidal cavity 44 is provided with.At each suction stroke, all in toroidal cavity 44, inject fluid by first fluid passage 56.Because fluid is injected by high pressure, therefore by the injection process of toroidal cavity 44, the material penetrating into concrete piston can be washed.Now the lip 52 of scraper ring 38 can carry cylinder casing wall slightly to float due to hydrodynamic pressure relatively, and can be adjacent to conveying cylinder casing wall in ensuing stock process.Meanwhile, pressure seal 40 forms cylinder sleeve type ring packing, and pressure seal 40 comprises is located at seal ring in piston groove 58 40 ' and flexible O RunddichtringO 60, and has axial free clearance between this pressure seal 40 and piston groove 58.The seal ring 40 ' that O RunddichtringO 60 communicates with annular space 36 in order to pretension as elastic element.
As shown in Figure 3, it is relative to the difference of Fig. 2: piston groove 58 has carried out expansion slightly, be provided with the fluid passage of cylinder sleeve type annular pressure Sealing 40, axial clearance and backflow non-return valve in piston groove 58, specifically comprise seal ring 40 ', O RunddichtringO 60, axial clearance 62, radial clearance 64 and radial passage 72.Due to ambient pressure, the fluid in water tank can inject in concrete piston 21 from conveying cylinder cavity volume 46.In Fig. 3, in cylinder sleeve type annular pressure Sealing 40, be provided with backflow non-return valve.At suction stroke, by reference to pumping pressure, toroidal cavity 44 internal pressure is reduced to below ambient pressure, the bearing 65 of concrete piston second end face will be lifted, pressure seal 40 can opposed annular cavity 44 axial displacement, make the fluid outside pressure seal 40 can be passed through the free clearance of pressure seal 40, piston groove 58, radial passage 72, inject in toroidal cavity 44.At stock stroke, lip 52 pressurized of scraper ring 38, buffer memory chamber 54 volume is reduced, thus make fluid by toroidal cavity 44, float over the lip 52 of conveying cylinder internal surface 42, and the first end face of concrete piston 21 infiltrates in conveying cylinder cavity volume 45, thus complete cleaning process, in this scheme, the first fluid passage 56 arranged in Fig. 2 can be cancelled.
Same Fig. 3 of principle of structure shown in Fig. 4, in addition, the central position of concrete piston 21 first end face is provided with the space 66 of opening, be provided with outside it be made up of elastic material, can the diaphragm 68 of perception pumping material pressure.By diaphragm 68 pairs of spaces 66 carry out spacing formed close the first stroke room 70; First stroke room 70 is communicated with toroidal cavity 44 and piston groove 58 by axis-radial passage 72.In the present embodiment, in piston groove 58, be provided with cylinder sleeve type annular pressure Sealing 40 equally, axial clearance 62, radial clearance 64 and radial passage 72.Pressure seal 40 can seal the conveying cylinder cavity volume 46 of rear end.In the suction stage, toroidal cavity 44 can be made to produce a pressure drop by diaphragm 68, the pressure seal 40 that fluid floats by relative seat 65, the outer arch of diaphragm 68 is made to produce pretightening force, at ensuing stock stroke, by the effect of diaphragm 68, fluid unnecessary in toroidal cavity 44 can be forced out, infiltrate conveying cylinder cavity volume 45 by concrete piston first end face, thus reach the object of cleaning scraper oil ring lip 52.
The principle of structure shown in Fig. 5 is the same, and it is relative to the difference of Fig. 4: in concrete piston 21, be provided with receiving cavity 74, is provided with plunger 76 in receiving cavity 74.Plunger 76 is connected with a plunger top board 78; And be coupled with diaphragm 68 by a piston spring 80, therefore at stock stroke and suction stroke, plunger 76 all can be mobile in receiving cavity 74 under the effect of diaphragm 68.Receiving cavity 74 and stroke room, plunger 76 common spacing formation second stroke room 82, second 82 are communicated with liquid storage tank by second fluid passage 86, and are communicated with toroidal cavity 44 by the 3rd fluid passage 84; Second fluid passage 86 and the 3rd fluid passage 84 are equipped with backflow non-return valve 88,89, and guarantee do not have fluid to be pressed in liquid storage tank at stock stroke, suction stroke does not have fluid to be sucked out from toroidal cavity 44.Being provided with the 4th fluid passage 92, fluid passage the 92, four is in addition located between space 66 and concrete piston 21 second end face; Wherein concrete piston 21 second end face is by the water cleaning in water tank.Thus realize: at stock stroke, fluid can inject toroidal cavity 44, and toroidal cavity 44 can be cleaned up hill and dale.In addition, at stock stroke and suction stroke, the pressure in toroidal cavity 44 is all identical with the pressure of pumping material.The volume of the second stroke room 82 can change according to the magnitude of pressure differential in the conveying cylinder 10 of diaphragm 68 perception, wherein this magnitude of pressure differential refers to the magnitude of pressure differential that the 3rd fluid passage 84 or second fluid passage 86 produce when feed liquor or discharge opeing, wherein, the first stroke room 70 is communicated with water tank by second fluid passage 86 with the second stroke room 82.
In addition, by the developing result of fluid, the improvement of other function can also be realized, such as, can reduce the wearing and tearing of scraper ring 38 lip 52.Consider that the leakage amount of fluid in cylinder sleeve type lip ring 40 region is fewer than extrusion capacity during pumping.Cylinder sleeve type lip ring 40 is assemblied in piston groove 58, and reserved axial clearance 62, when reciprocating pump starts, a discharge opeing process fast will be had; And by discharge opeing effect and valve effect, toroidal cavity 44 can be filled liquid.
As shown in Figure 4 and Figure 5, concrete piston 21 is mutually assembled by two piston bodies be separated in the axial direction 96,98, forms public axial separation face 94.Thus passage, pressure seal 40 etc. needed for stock stroke and suction stroke can be set at concrete internal piston.Piston body 96,98 by some 99 realization assemblings that tight a bolt, and diaphragm 68 is clamped in the first end face of concrete piston by flexible scraper ring 38.
Fluid can use organic liquid, such as uses the ageing oil of recovery to substitute water and plays flushing action, not only cost-saving, lubrication and reduce abrasive effect better.Simultaneously owing to carrying the internal surface 42 of cylinder 10 can produce one deck oil film, can prevent tiny concrete or mortar bonding on conveying cylinder internal surface, reduce friction better.
In sum, can obtaining as drawn a conclusion: the invention provides a kind of pumping mud shape material, especially concrete reciprocating pump, at least comprising a conveying cylinder 10, being provided with in conveying cylinder 10 can the concrete piston 21 of axial motion, therebetween reserved radial annular space 36.Concrete piston second end face is connected by piston rod 22 and driving mechanism 20,24, and wherein, driving mechanism is at least double-acting oil hydraulic cylinder.Concrete piston 21 both ends of the surface are respectively provided with a flexible ring-type element; This ring-type element is communicated with annular space 36, and fits in the internal surface 42 of conveying cylinder 10.For carrying the wearing and tearing between cylinder 10 and concrete piston 21 when reducing high pressure pumping, the present invention advises: install scraper ring 38 at concrete piston first end face; At concrete piston second end face setting pressure Sealing 40; Simultaneously scraper ring and pressure seal to annular space 36 carry out axial limiting form one can the toroidal cavity 44 of containing fluid, toroidal cavity 44 have at least one can temporarily with extraneous fluid passage 56,84,86 that communicate.Present invention also offers a kind of concrete pump with above-mentioned reciprocating pump.
Above a kind of reciprocating pump provided by the present invention is described in detail.Apply specific case herein to set forth principle of the present invention and mode of execution, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.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 improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (21)
1. the reciprocating pump of a pumping mud shape material, comprise at least one conveying cylinder (10), being provided with in conveying cylinder (10) can the concrete piston (21) of axial motion, between concrete piston (21) and conveying cylinder (10), there is annular space (36), second end face of concrete piston (21) is by piston rod and driving mechanism (20, 24) be connected, first end face of concrete piston (21) is provided with scraper ring (38), second end face of concrete piston (21) is provided with pressure seal (40), described scraper ring (38) and described pressure seal (40) carry out spacing to annular space (36), form toroidal cavity (44), it is characterized in that: in described toroidal cavity (44), be injected with a certain amount of fluid all the time, described fluid is by the instantaneous pressure press-in of the pumping material of concrete piston (21) first end face side, described toroidal cavity (44) has at least one fluid passage (56,84,86) that can temporarily communicate with the external world, and described fluid passage (56,84,86) are provided with backflow non-return valve (89,90), described pressure seal (40) comprises is located at seal ring (40 ') in piston groove (58) and flexible O RunddichtringO (60), the seal ring (40 ') that O RunddichtringO (60) can communicate with annular space (36) for pretension.
2. reciprocating pump according to claim 1, is characterized in that: be provided with guide ring (48) between described scraper ring (38) and described pressure seal (40); Described guide ring (48) communicates with annular space (36), and guide ring (48), with open channel (50), realizes fluid circulation in the axial direction.
3. reciprocating pump according to claim 1, is characterized in that: described scraper ring (38) by can bearing pressure, flexible lip (52) forms; The front end of lip contacts with pumping material, and the rear end of lip contacts with toroidal cavity (44).
4. reciprocating pump according to claim 2, is characterized in that: described scraper ring (38) by can bearing pressure, flexible lip (52) forms; The front end of lip contacts with pumping material, and the rear end of lip contacts with toroidal cavity (44).
5. reciprocating pump according to claim 3, it is characterized in that: the lip (52) of described scraper ring (38) can fit in conveying cylinder surfaces (42), between scraper ring (38) and the first end face of concrete piston, be provided with buffer memory chamber (54), this buffer memory chamber (54) is communicated with toroidal cavity (44).
6. reciprocating pump according to claim 4, it is characterized in that: the lip (52) of described scraper ring (38) can fit in conveying cylinder surfaces (42), between scraper ring (38) and the first end face of concrete piston, be provided with buffer memory chamber (54), this buffer memory chamber (54) is communicated with toroidal cavity (44).
7. the reciprocating pump according to any one of claim 1-6, is characterized in that: described concrete piston carries out the to-and-fro motion of suction and stock in conveying cylinder; And conveying cylinder is provided with a first fluid passage (56) that penetrate conveying cylinder casing wall, can inject fluid in toroidal cavity (44).
8. reciprocating pump according to claim 7, is characterized in that: described pressure seal (40) can opposed annular cavity (44) axial displacement, can inject fluid outside it; The fluid passage of axial clearance and backflow non-return valve is provided with in piston groove (58).
9. reciprocating pump according to claim 7, it is characterized in that: the first end face center of described concrete piston (21) is provided with space (66), space (66) outside is provided with can the diaphragm (68) of perception pumping material pressure.
10. reciprocating pump according to claim 9, is characterized in that: described scraper ring (38) is positioned at the outer ledge of diaphragm (68).
11. reciprocating pumps according to claim 9, it is characterized in that: described diaphragm (68) carries out spacing to described space (66), form the first stroke room (70) being used for containing fluid, described first stroke room (70) is communicated with toroidal cavity (44).
12. reciprocating pumps according to claim 9, it is characterized in that: described concrete piston is provided with receiving cavity (74), plunger (76) is provided with in described receiving cavity (74), by the effect of diaphragm (68), plunger (76) can move in receiving cavity (74); Receiving cavity (74) and plunger (76) spacing formation second stroke room (82), described second stroke room (82) can be communicated with toroidal cavity (44).
13. reciprocating pumps according to claim 11, it is characterized in that: the first described stroke room (70) is communicated with water tank by second fluid passage (86), and be communicated with toroidal cavity (44) by the 3rd fluid passage (84).
14. reciprocating pumps according to claim 12, it is characterized in that: the second described stroke room (82) is communicated with water tank by second fluid passage (86), and be communicated with toroidal cavity (44) by the 3rd fluid passage (84).
15. reciprocating pumps according to claim 13, is characterized in that: described second fluid passage (86) and/or described 3rd fluid passage (84) are provided with backflow non-return valve (88,90).
16. reciprocating pumps according to claim 14, is characterized in that: described second fluid passage (86) and/or described 3rd fluid passage (84) are provided with backflow non-return valve (88,90).
17. reciprocating pumps according to claim 12, is characterized in that: described plunger (76) is contacted with diaphragm (68) by plunger top board (78) and/or piston spring (80).
18. reciprocating pumps according to claim 7, is characterized in that: described concrete piston (21) is combined mutually by the piston body that two are separated in the axial direction.
19. reciprocating pumps according to claim 7, is characterized in that: the piston rod of described concrete piston, through the water tank for store fluid, is connected with driving mechanism.
20. reciprocating pumps according to claim 7, is characterized in that: described driving mechanism is at least double-acting oil hydraulic cylinder.
21. 1 kinds of concrete pumps, is characterized in that: comprise the reciprocating pump described in any one of claim 1-20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210075167.5A CN102606442B (en) | 2012-03-21 | 2012-03-21 | Piston pump for pumping slurry shaped materials, in particular concrete, and concrete pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210075167.5A CN102606442B (en) | 2012-03-21 | 2012-03-21 | Piston pump for pumping slurry shaped materials, in particular concrete, and concrete pump |
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| CN102606442A CN102606442A (en) | 2012-07-25 |
| CN102606442B true CN102606442B (en) | 2015-06-10 |
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| CN201210075167.5A Active CN102606442B (en) | 2012-03-21 | 2012-03-21 | Piston pump for pumping slurry shaped materials, in particular concrete, and concrete pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103850907A (en) * | 2014-03-12 | 2014-06-11 | 中国石油大学(华东) | Double plunger type high pressure grinding material injection device |
| CN105179377B (en) * | 2015-09-21 | 2017-06-23 | 济南大学 | A kind of sealing piston of hydraulic cylinder device with anti-deformation and storage oil leak ability |
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| CN107175019A (en) * | 2017-06-30 | 2017-09-19 | 嘉善凝辉新型建材有限公司 | A kind of mixing plant |
| CN111622915B (en) * | 2020-06-22 | 2021-09-24 | 苏州维斯勒姆智能科技有限公司 | Flat straight-connected concrete ultrahigh-pressure delivery pump |
| CN112780518B (en) * | 2020-06-23 | 2022-04-22 | 江苏锡安达防爆股份有限公司 | Double-cylinder pumping device with stroke controlled for viscous material |
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