CN102619977B - Novel concrete piston and concrete transporting device having same - Google Patents
Novel concrete piston and concrete transporting device having same Download PDFInfo
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- CN102619977B CN102619977B CN201210101472.7A CN201210101472A CN102619977B CN 102619977 B CN102619977 B CN 102619977B CN 201210101472 A CN201210101472 A CN 201210101472A CN 102619977 B CN102619977 B CN 102619977B
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- 239000004576 sand Substances 0.000 claims abstract description 124
- 238000007789 sealing Methods 0.000 claims abstract description 50
- 238000007790 scraping Methods 0.000 claims abstract description 12
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 239000002893 slag Substances 0.000 claims description 22
- 239000000428 dust Substances 0.000 claims description 16
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 abstract description 24
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 208000035874 Excoriation Diseases 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- -1 residual silt Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The invention provides a novel concrete piston, which comprises a front-mounted piston, a connecting rod and a main piston, wherein the front-mounted piston is in clearance fit with the inner wall of a transporting cylinder, and the main piston is in interference fit with the inner wall of the transporting cylinder; two ends of the connecting rod are respectively fixedly connected with the front-mounted piston and the main piston; a cavity is respectively formed between the end surfaces of the front-mounted piston and the main piston and the outer wall of the connecting rod and between the end surfaces of the front-mounted piston and the main piston and the inner wall of the transporting cylinder; a sand scraping device is respectively arranged inside the cavities, and each sand scraping device sweeps hard particles such as sand adhered on the inner wall of the transporting cylinder into the cavities; and each cavity is connected with a sand discharging device, and the sand discharging device can discharge the hard particles such as the sand inside the cavities. The invention also provides a concrete transporting device comprising the novel concrete piston. Through the technical scheme provided by the invention, the service life of the concrete piston can be effectively prolonged, and especially the service life of the wearing parts such as concrete sealing bodies and the like can be prolonged.
Description
Technical Field
The invention relates to a piston, in particular to a concrete piston and a concrete conveying device with the concrete piston.
Background
The concrete pump is a building device which realizes the functions of sucking and pumping materials by utilizing the sliding seal between a concrete piston and a conveying cylinder. The typical structure of the combined concrete piston consists of a pressure plate, a concrete sealing body, a guide ring, a dust ring, a bolt and a piston framework. The concrete sealing body is in interference fit with the conveying cylinder to realize the sealing function; the guide ring and the lubricating grease around the guide ring realize the guide and lubrication functions of the concrete piston; dustproof and water proof functions are realized by the cooperation of the dustproof ring and the conveying cylinder.
However, the concrete piston works in a conveying cylinder with the length of 2 meters, and is influenced by multi-directional flow (concrete) high-pressure impact, concrete piston part machining and assembly errors (particularly coaxiality and cylindricity), hydraulic system vibration, deformation of a slender piston rod and the like, so that phenomena of damage of a concrete sealing body, eccentric wear of the concrete piston, cylinder pulling and the like are generated. The research aiming at the phenomenon discovers that the destruction steps are as follows:
1. the concrete sealing body is deformed under the influence and rubs with the conveying cylinder to generate high temperature, and a nearby lubricating oil film is damaged; the concrete sealing body is adhered, torn off and adhered to the conveying cylinder to form adhesive abrasion, and the concrete sealing is initially damaged;
2. tiny sand is clamped between the damaged concrete sealing body and the conveying cylinder, the main form of abrasion on the concrete sealing body and the conveying cylinder is changed into abrasive wear, and the sealing is further damaged;
3. the harder profile peak or abrasive particles scratch strip-shaped fine grooves on the matching surface like cutting, even the concrete is separated and adhered to a concrete piston under the action of high temperature and is hardened together, the hard materials fall off together with the concrete piston, a vicious circle of abrasive particle abrasion is formed, and finally the sealing is completely damaged.
In the prior art, there is an improved combined concrete piston, the structure of which is shown in fig. 1, and the structure is characterized as follows:
1. the concrete piston consists of a piston body 01 and a piston floating body 02 which are connected 03 through a chain and can move axially or radially relative to each other;
2. a closed cavity 05 is formed among the piston floating body 02, the piston body 01 and the conveying cylinder 04;
3. the piston body 01 is provided with a check valve 06, and high-pressure liquid in the cylinder 04 is conveyed after the piston body 01 is sucked by pressure difference.
This structure has the following drawbacks:
1. the pressure of the high-pressure liquid in the suction chamber needs to be greater than the pumping pressure of concrete in the conveying cylinder, so that the concrete piston is not suitable for a high-pressure pumping concrete pump;
2. the interference fit part is flushed by the high-pressure liquid, so that the secondary abrasion of the concrete sealing body and the conveying cylinder is caused, and the quality of the pumped concrete is influenced;
3. the installation of the check valve increases the complexity of the concrete piston processing and assembling process and the maintenance cost in the future.
Therefore, how to effectively prolong the service life of the concrete piston, especially the service life of wearing parts such as the concrete sealing body, remains a technical problem which needs to be solved at present.
Disclosure of Invention
Based on the above background art, there is a need for a concrete piston, which can effectively prolong the service life of the concrete piston, especially the service life of vulnerable parts such as concrete sealing bodies.
The invention provides a concrete piston, comprising: the device comprises a front piston, a connecting rod and a main piston which are arranged in a conveying cylinder, wherein the front piston is in clearance fit with the inner wall surface of the conveying cylinder, and the main piston is in interference fit with the inner wall surface of the conveying cylinder; two ends of the connecting rod are respectively and fixedly connected with the front piston and the main piston; a cavity is formed between the end surfaces of the front piston and the main piston and the outer wall surface of the connecting rod and the inner wall surface of the conveying cylinder; a sand scraping device is arranged in the cavity and is in contact with the inner wall of the conveying cylinder, so that the sand and sand adhered to the inner wall of the conveying cylinder can be swept into the cavity; the chamber is connected with the sand discharge device, and the sand discharge device can discharge silt in the chamber.
Preferably, the sand scraping device comprises a wear-resistant ring, the wear-resistant ring is fixedly arranged on the outer peripheral wall of the connecting rod, and the wear-resistant ring is matched with the inner wall of the conveying cylinder.
Preferably, a concrete sealing body, a guide ring and a dust ring are mounted on the outer peripheral surface of the main piston, the concrete sealing body is mounted adjacent to the connecting rod, the dust ring is mounted adjacent to the outer end surface of the main piston, and the guide ring is located between the concrete sealing body and the dust ring; the concrete sealing body is in interference fit with the inner wall surface of the conveying cylinder.
Preferably, the front piston, the connecting rod and the main piston are integrally formed. Or,
the front piston and the connecting rod are processed in a connected mode, and the connecting rod is fixedly connected with the main piston through a fixing piece; the concrete sealing body is fixed on the main piston through a sealing body pressing plate; the connecting rod is fixedly connected with the main piston through the sealing body pressing plate.
Preferably, a front piston baffle is fixedly mounted on the outer end face of the front piston; and the outer peripheral surface of the front piston is provided with a piston ring made of a high-hardness material, and the piston ring is in clearance fit with the inner wall surface of the conveying cylinder.
Preferably, a front piston guide sleeve is mounted on the outer peripheral surface of the front piston, and the front piston guide sleeve is in clearance fit with the inner wall surface of the conveying cylinder.
Preferably, the wear-resistant ring is provided with at least one wear-resistant brush in interference fit with the inner wall surface of the conveying cylinder; the wear-resistant brush has elasticity.
Preferably, the lower part of the wear-resistant brush is provided with an axial through groove for silt to pass through.
Preferably, the sand discharge device comprises a sand suction port, a sand suction pipeline and a sand suction device; inhale husky mouth opening orientation the cavity, inhale husky mouth through inhale husky pipeline with inhale husky ware intercommunication, inhale husky ware is for inhale husky mouth provides the suction of inhaling husky.
Preferably, the sand suction port is a V-shaped sand suction port arranged on the outer wall surface of the connecting rod; the sand suction pipeline comprises branch pipes, a collecting pipe and a sand suction main pipe; the branch pipe is arranged in the connecting rod, one end of the branch pipe is communicated with the V-shaped sand suction port, and the other end of the branch pipe is communicated with the collecting pipe; the collecting pipe is arranged in the main piston, one end of the collecting pipe is communicated with the branch pipe, and the other end of the collecting pipe is communicated with the sand suction main pipe; one end of the sand suction main pipe is communicated with the collecting pipe, and the other end of the sand suction main pipe is communicated with the sand suction device.
Preferably, a plurality of V-shaped sand suction ports are arranged on the outer wall surface of the connecting rod at intervals; the sum of suction covering angles of the V-shaped sand suction ports is not less than 360 degrees; the sand suction pipeline comprises a plurality of branch pipes, one end of each branch pipe is communicated with a V-shaped sand suction port, and the other ends of the branch pipes are converged and then connected with the collecting pipe; the sum of the cross-sectional areas of all the branch pipes is smaller than the cross-sectional area of the collecting pipe.
Preferably, the plurality of V-shaped sand suction ports are positioned on the same circumference, and the central angles between every two adjacent V-shaped sand suction ports are equal; the included angle between every two adjacent branch pipes is equal.
Preferably, the sand discharge device further comprises a slag suction port arranged at the bottom of the chamber, and the slag suction port is communicated with the collecting pipe through a pipeline.
Preferably, the slag suction port is communicated with the collecting pipe through a slag suction pipe arranged in the main piston body; the sum of the cross-sectional areas of all the branch pipes and the area of the slag suction port is smaller than the cross-sectional area of the collecting pipe.
Preferably, a hoisting mechanism is arranged on the sand sucker, and the sand sucking main pipe is wound on the hoisting mechanism.
Preferably, the sand discharge device comprises a sand suction port, a sand suction pipeline and a sand suction device; the sand suction port is a circular hole arranged on the wear-resistant ring, a plurality of wear-resistant brushes in interference fit with the inner wall surface of the conveying cylinder are arranged on the wear-resistant ring along the axial direction of the concrete piston, and one side of each wear-resistant brush close to the front piston is provided with the sand suction port; a plurality of groups of radial holes and at least one axial hole are arranged in the connecting rod, the opening of each radial hole is communicated with the sand suction port of the wear-resistant ring, and the other end of each radial hole is communicated with the axial hole; and a connecting pipe is arranged in the main piston, one end of the connecting pipe is connected with the axial hole, and the other end of the connecting pipe is communicated with the sand suction main pipe.
The invention also provides a concrete conveying device which comprises the concrete piston in any one of the technical schemes.
In conclusion, according to the technical scheme of the invention, a gap is formed between the preposed piston and the conveying cylinder, so that hard particles such as fine silt and the like can enter the cavity or be adhered to the inner wall surface of the conveying cylinder, then the hard particles such as fine silt and the like are swept down from the inner wall surface of the conveying cylinder through the sand scraping device, and are discharged out of the conveying cylinder through the sand discharging device without flushing the hard particles such as fine silt and the like back to the pumped concrete, thereby avoiding influencing the quality of the pumped concrete, cutting off the vicious circle of abrasive wear of the concrete sealing body and the conveying cylinder, creating a working environment without abrasive wear for the main piston, and prolonging the service lives of the concrete piston, the concrete sealing body and the conveying cylinder; and a one-way valve does not need to be arranged on the concrete piston, so that the complexity of the processing and assembling process of concrete piston parts is reduced, and the maintenance difficulty is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a concrete piston in the prior art;
FIG. 2 is a schematic illustration of a concrete piston according to one embodiment of the present invention;
FIGS. 3 and 5 are schematic structural views of concrete pistons according to various embodiments of the present invention;
FIG. 4 is a schematic sectional view A-A of the concrete piston shown in FIG. 3;
fig. 6 is an enlarged view of a portion B in fig. 5.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
FIG. 2 is a schematic illustration of a concrete piston according to one embodiment of the present invention; FIGS. 3 and 5 are schematic structural views of concrete pistons according to various embodiments of the present invention; fig. 4 is a schematic sectional view taken along line a-a of the concrete piston shown in fig. 3, and fig. 6 is an enlarged view of portion B of fig. 5.
As shown in FIG. 2, the present invention provides a concrete piston, comprising: the device comprises a front piston 21, a connecting rod 22 and a main piston 23 which are arranged in a conveying cylinder 1, wherein the front piston 21 is in clearance fit with the inner wall surface of the conveying cylinder 1, and the main piston 23 is in interference fit with the inner wall surface of the conveying cylinder 1; two ends of the connecting rod 22 are respectively fixedly connected with the front piston 21 and the main piston 23; a cavity 3 is formed between the end surfaces of the front piston 21 and the main piston 23, the outer wall surface of the connecting rod 22 and the inner wall surface of the conveying cylinder 1; a sand scraping device is arranged in the chamber 3 and sweeps the silt adhered to the inner wall of the conveying cylinder 1 into the chamber 3; the chamber 3 is connected with a sand discharge device which can discharge hard particles such as silt in the chamber 3. In the figure, the direction of the arrows indicates the direction of the silt discharge.
In the technical scheme, a gap (about 0.3-0.5 mm) exists between the front piston 21 and the conveying cylinder 1, so that hard particles such as fine silt and the like can enter the cavity 3, the sand scraping device sweeps the hard particles such as silt and the like adhered to the inner wall of the conveying cylinder 1 into the cavity 3, then the hard particles such as fine silt and the like are discharged out of the conveying cylinder 1, the hard particles such as fine silt and the like do not need to be flushed back into pumped concrete, the quality of the pumped concrete is prevented from being influenced, vicious circle of abrasive wear of a concrete sealing body and the conveying cylinder is cut off, a working environment without abrasive wear is created for the main piston 23, and the service lives of the concrete piston, the concrete sealing body and the conveying cylinder 1 are prolonged; and a one-way valve does not need to be arranged on the concrete piston, so that the complexity of the processing and assembling process of concrete piston parts is reduced, and the maintenance difficulty is reduced.
Preferably, as shown in fig. 3 and 4, the sand scraping device comprises a wear-resistant ring 4, the wear-resistant ring 4 is fixedly arranged on the outer peripheral wall of the connecting rod 22, and the wear-resistant ring 4 is matched with the inner wall of the conveying cylinder 1; the sand discharging device comprises a sand suction port 51, a sand suction pipeline 52 and a sand suction device 53; the sand suction port 51 opens towards the chamber 3, the sand suction port 51 is connected with a sand sucker 53 through a sand suction pipeline 52, and the sand sucker 53 provides sand suction force for the sand suction port 51.
In the technical scheme, the wear-resistant ring 4 is matched with the inner wall of the conveying cylinder 1, so that hard particles such as fine silt and the like on the inner wall of the conveying cylinder 1 can be swept down when the concrete piston moves, and then the hard particles are discharged by the sand discharge device.
As shown in fig. 3, the front piston 21, the connecting rod 22 and the main piston 23 may be integrally formed; the outer peripheral surface of the main piston 23 is provided with a concrete sealing body 231, a guide ring 232 and a dust ring 233, the concrete sealing body 231 is arranged adjacent to the connecting rod 22, the dust ring 233 is arranged adjacent to the outer end surface of the main piston 23, and the guide ring 232 is positioned between the concrete sealing body 231 and the dust ring 233; the concrete sealing body 231 is in interference fit with the inner wall surface of the conveying cylinder 1. The integrally formed concrete piston is firmer and simpler to process; the concrete sealing body 231 realizes a sealing function, the guide ring 232 realizes a guiding and lubricating function, and the dust ring 233 realizes dust blocking and water resisting functions.
The front piston 21, the connecting rod 22 and the main piston 23 are made of high-hardness polymer organic materials; a front piston baffle 211 is fixedly arranged on the outer end surface of the front piston 21; the piston ring 212 made of a high hardness material is mounted on the outer peripheral surface of the front piston 21, and the piston ring 212 is in clearance fit with the inner wall surface of the transfer cylinder 1.
In the technical scheme, the dust blocking ring 233 can prevent foreign matters from entering the conveying cylinder to influence the work of the conveying cylinder; the front piston baffle 211 is used for resisting the high-pressure impact of concrete; the front piston 21 is provided with a high-hardness metal piston ring for protecting the circumferential surface of the front piston 21.
Preferably, the wear-resistant ring 4 is provided with at least one wear-resistant brush 41 in interference fit with the inner wall surface of the conveying cylinder 1; the wear brush 41 has elasticity. The elastic wear-resistant brush can scrape sand completely and protect the inner wall surface of the conveying cylinder.
In this technical solution, preferably, an axial through slot 411 for allowing silt to pass through is formed at the lower portion of the wear-resistant brush 41. So as to provide a passage for the silt which is not discharged by the silt suction port 51 to enter the slag suction port 55 at the lower part of the chamber 3 and discharge the remaining silt.
Preferably, the wear-resistant ring 4 is provided with a wear-resistant brush 41 which is in interference fit with the inner wall surface of the conveying cylinder 1; the sand suction port 51 is a V-shaped sand suction port formed on the outer wall surface of the connecting rod 22; the sand suction pipeline 52 comprises a branch pipe 521, a collecting pipe 522 and a sand suction main pipe 523; the branch pipe 521 is arranged in the connecting rod 22, one end of the branch pipe is communicated with the V-shaped sand suction port, and the other end of the branch pipe is communicated with the collecting pipe 522; the collecting pipe 522 passes through the main piston 23, one end of the collecting pipe is communicated with the branch pipe 521, and the other end of the collecting pipe is communicated with the sand suction main pipe 523; one end of the sand suction main pipe 523 is communicated with the collecting pipe 522, and the other end is communicated with the sand sucker 53. The sand suction port is arranged in a V shape, so that the suction coverage angle is large, and the sand suction effect is better.
Preferably, as shown in fig. 4, a plurality of V-shaped sand suction ports are arranged on the outer wall surface of the connecting rod 22 at intervals; preferably, the plurality of V-shaped sand suction ports are positioned on the same circumference, and the central angles between every two adjacent V-shaped sand suction ports are equal; the sum of the suction covering angles of the V-shaped sand suction ports is not less than 360 degrees; the sand suction pipeline 52 comprises a plurality of branch pipes 521, one end of each branch pipe 521 is communicated with a corresponding V-shaped sand suction port, and the other ends of the branch pipes 521 are converged and then connected with a collecting pipe 522; preferably, the included angle between each two adjacent branches 521 is equal; the sum of the cross-sectional areas of all the branch pipes 521 is smaller than the cross-sectional area of the manifold 522. In the embodiment, 10V-shaped nozzles and 10 branch pipes are adopted, so that the suction covering angle of each V-shaped nozzle is not less than 36 degrees, and the included angle between every two branch pipes is 36 degrees. In this embodiment, the "coverage of the suction force of the V-shaped sand suction port" means a range in which the V-shaped suction port can suck away the sediment, and the sediment in the range can be sucked away by the V-shaped sand suction port.
In the technical scheme, the sum of the cross sectional areas of all the branch pipes 521 is smaller than the cross sectional area of the collecting pipe 522, so that the suction force can be amplified, and the blockage of the collecting pipe 522 can be effectively avoided.
Preferably, the sand discharging device further comprises a slag suction port 55 arranged at the bottom of the chamber 3, and the slag suction port 55 is communicated with the collecting pipe 522 through a pipeline. The slag suction port 55 is arranged, so that after the sand suction port 51 sucks sand, residual silt, impurities and the like fall into the bottom of the chamber 3 and are discharged through the slag suction port 55. The bottom of the chamber 3, as used herein, refers to the lowermost portion of the chamber 3, as shown in the lower portion of the figures of fig. 3 and 5. In this embodiment, the slag suction port 55 is matched with the axial through groove 411 at the bottom of the wear-resistant brush 41, and discharges residual silt which is not sucked away by the sand suction port 51, that is, the residual silt is collected to the bottom of the chamber 3 under the action of gravity, and then reaches the slag suction port 55 through the axial through groove 411 at the bottom of the wear-resistant brush 41, and is discharged.
Preferably, the slag suction port 55 communicates with the manifold 522 through a slag suction pipe 551 provided in the main piston 23; the sum of the cross-sectional area of all the branch pipes 521 and the area of the slag suction port 55 is smaller than the cross-sectional area of the collecting pipe 522.
In the technical scheme, the clearance between the slag suction port 55 and the inner wall of the conveying cylinder 1 is small, a needle-shaped design is adopted, and a needle hole is slightly larger than the particle size of hard particles such as fine silt.
Preferably, the sand sucker 53 is provided with a hoisting mechanism 56, and the sand sucking main pipe 523 is wound on the hoisting mechanism 56, so that the hoisting mechanism 56 can control the hoisting and releasing of the sand sucking main pipe 523.
In the technical scheme, the hoisting mechanism 56 can control the retraction of the sand suction main pipe 523 and complete the sand discharge and slag discharge work in cooperation with the telescopic motion of the concrete piston.
As shown in fig. 5 and 6, another embodiment of the concrete piston of the present invention is: the front piston 21, the connecting rod 22 and the main piston 23 can also be made of light materials which have higher hardness and are easy to process, for example, light alloys or inorganic non-metallic materials; the front piston 21 and the connecting rod 22 are integrally processed, and the connecting rod 22 is fixedly connected with the main piston through a fixing piece; the outer peripheral surface of the main piston 23 is provided with a concrete sealing body 231, a guide ring 232 and a dust ring 233, the concrete sealing body 231 is arranged adjacent to the connecting rod 22, the dust ring 233 is arranged adjacent to the outer end surface of the main piston 23, the guide ring 232 is positioned between the concrete sealing body 231 and the dust ring 233, and the concrete sealing body 231 is in interference fit with the inner wall of the conveying cylinder 1; a front piston guide sleeve 214 is mounted on the outer peripheral surface of the front piston 21, and the front piston guide sleeve 214 is in clearance fit with the inner wall surface of the delivery cylinder 1. The concrete sealing body 231 is fixed on the main piston 23 through the sealing body pressing plate 234; the connecting rod 22 is fixedly connected with the main piston through a sealing body pressing plate 234; the front piston guide 214 is mounted on the outer wall surface of the front piston 21 by a male-female fitting structure.
In the technical scheme, a gap (about 0.3-0.5 mm) exists between the front piston 21 and the conveying cylinder 1, so that hard particles such as fine silt and the like can enter the cavity 3, the sand scraping device sweeps the hard particles such as silt and the like adhered to the inner wall of the conveying cylinder 1 into the cavity 3, then the hard particles such as fine silt and the like are discharged out of the conveying cylinder 1, the hard particles such as fine silt and the like do not need to be flushed back into pumped concrete, the quality of the pumped concrete is prevented from being influenced, vicious circle of abrasive wear of a concrete sealing body and the conveying cylinder is cut off, a working environment without abrasive wear is created for the main piston 23, and the service lives of the concrete sealing body of the concrete piston and the conveying cylinder 1 are prolonged; and a one-way valve does not need to be arranged on the concrete piston, so that the complexity of the processing and assembling process of concrete piston parts is reduced, and the maintenance difficulty is reduced.
Preferably, the sand suction port 51 is a circular hole arranged on the wear-resistant ring 4, and a plurality of wear-resistant brushes 41 in interference fit with the inner wall surface of the conveying cylinder 1 are arranged on the wear-resistant ring 4 in parallel along the axial direction of the concrete piston; a plurality of groups of radial holes 524 and at least one axial hole 525 are arranged in the connecting rod 22, the opening of the radial hole 524 is communicated with the round hole of the wear-resistant ring 4, and the other end of the radial hole 524 is communicated with the axial hole 525; a connecting pipe 526 is arranged in the main piston 23, one end of the connecting pipe 526 is connected with the axial hole 525, and the other end is communicated with the sand suction main pipe 523. Other structures are the same as those of the above embodiments, and are not described again.
The concrete piston provided by the embodiment can sweep the silt adhered to the inner wall surface of the conveying cylinder 1 through the wear-resistant brushes 41 arranged in parallel, then the silt is sucked into a plurality of groups of radial holes 524 through the round holes on the wear-resistant ring 4, enters the connecting pipe 526 through the axial hole 525, and finally is discharged through the sand suction main pipe 523, and the aim of the invention can also be achieved.
The invention also provides a concrete conveying device which comprises the concrete piston in any technical scheme and has all the beneficial effects of the concrete piston.
In conclusion, a gap exists between the front piston and the conveying cylinder, so that hard particles such as fine silt and the like can enter the cavity, the sand scraping device sweeps the hard particles such as silt and the like adhered to the inner wall of the conveying cylinder into the cavity 3, then the hard particles such as fine silt and the like are discharged out of the conveying cylinder, the hard particles such as fine silt and the like do not need to be flushed back into the pumped concrete, the quality of the pumped concrete is prevented from being influenced, the vicious circle of abrasive wear of the concrete sealing body and the conveying cylinder is cut off, a working environment without abrasive wear is created for the main piston, and the service lives of the concrete piston, the concrete sealing body and the conveying cylinder are prolonged; and a one-way valve does not need to be arranged on the concrete piston, so that the complexity of the processing and assembling process of concrete piston parts is reduced, and the maintenance difficulty is reduced.
In the present invention, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance, the term "plurality" referring to two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (17)
1. A concrete piston, comprising:
the device comprises a front piston (21), a connecting rod (22) and a main piston (23) which are installed in a conveying cylinder (1), wherein the front piston (21) is in clearance fit with the inner wall surface of the conveying cylinder (1), and the main piston (23) is in interference fit with the inner wall surface of the conveying cylinder (1);
two ends of the connecting rod (22) are respectively and fixedly connected with the front piston (21) and the main piston (23);
a cavity (3) is formed between the end surfaces of the front piston (21) and the main piston (23) and the outer wall surface of the connecting rod (22) and the inner wall surface of the conveying cylinder (1);
a sand scraping device is arranged in the cavity (3), is in contact with the inner wall of the conveying cylinder (1), and can sweep silt adhered to the inner wall of the conveying cylinder (1) into the cavity (3);
the chamber (3) is connected with a sand discharge device, and the sand discharge device can discharge silt in the chamber (3);
the sand discharging device comprises a sand suction port (51), a sand suction pipeline (52) and a sand suction device (53);
inhale husky mouth (51) opening orientation chamber (3), inhale husky mouth (51) through inhale husky pipeline (52) with inhale husky ware (53) intercommunication, inhale husky ware (53) for inhale husky mouth (51) provide the suction of inhaling husky.
2. The concrete piston according to claim 1,
the sand scraping device comprises a wear-resistant ring (4), the wear-resistant ring (4) is fixedly installed on the outer peripheral wall of the connecting rod (22), and the wear-resistant ring (4) is matched with the inner wall of the conveying cylinder (1).
3. The concrete piston according to claim 1,
a concrete sealing body (231), a guide ring (232) and a dust ring (233) are mounted on the outer peripheral surface of the main piston (23), the concrete sealing body (231) is mounted adjacent to the connecting rod (22), the dust ring (233) is mounted adjacent to the outer end surface of the main piston (23), and the guide ring (232) is located between the concrete sealing body (231) and the dust ring (233); the concrete sealing body (231) is in interference fit with the inner wall surface of the conveying cylinder (1).
4. The concrete piston according to claim 3,
the front piston (21), the connecting rod (22) and the main piston (23) are integrally formed.
5. The concrete piston according to claim 3,
the front piston (21) and the connecting rod (22) are processed in a connected mode, and the connecting rod (22) is fixedly connected with the main piston (23) through a fixing piece;
the concrete sealing body (231) is fixed on the main piston (23) through a sealing body pressure plate (234);
the connecting rod (22) is fixedly connected with the main piston through the sealing body pressing plate (234).
6. Concrete piston according to any one of claims 1 to 5,
a front piston baffle (211) is fixedly arranged on the outer end surface of the front piston (21);
the outer peripheral surface of the front piston (21) is provided with a piston ring (212), and the piston ring (212) is in clearance fit with the inner wall surface of the conveying cylinder (1).
7. Concrete piston according to any one of claims 1 to 5,
the outer peripheral surface of the front piston (21) is provided with a front piston guide sleeve (214), and the front piston guide sleeve (214) is in clearance fit with the inner wall surface of the conveying cylinder (1).
8. The concrete piston according to claim 2,
the wear-resistant ring (4) is provided with at least one wear-resistant brush (41) which is in interference fit with the inner wall surface of the conveying cylinder (1);
the wear-resistant brush (41) has elasticity.
9. The concrete piston according to claim 8,
the lower part of the wear-resistant brush (41) is provided with an axial through groove (411) for silt to pass through.
10. The concrete piston according to claim 1,
the sand suction port (51) is a V-shaped sand suction port arranged on the outer wall surface of the connecting rod (22);
the sand suction pipeline (52) comprises branch pipes (521), a collecting pipe (522) and a sand suction main pipe (523);
the branch pipe (521) is arranged in the connecting rod (22), one end of the branch pipe is communicated with the V-shaped sand suction port, and the other end of the branch pipe is communicated with the collecting pipe (522);
the confluence pipe (522) penetrates through the main piston (23), one end of the confluence pipe is communicated with the branch pipe (521), and the other end of the confluence pipe is communicated with the sand suction main pipe (523);
one end of the sand suction main pipe (523) is communicated with the collecting pipe (522), and the other end of the sand suction main pipe is communicated with the sand suction device (53).
11. The concrete piston of claim 10,
a plurality of V-shaped sand suction ports are arranged on the outer wall surface of the connecting rod (22) at intervals;
the sum of suction covering angles of the V-shaped sand suction ports is not less than 360 degrees;
the sand suction pipeline (52) comprises a plurality of branch pipes (521), one end of each branch pipe (521) is communicated with a V-shaped sand suction port, and the other ends of the branch pipes (521) are converged and then connected with a collecting pipe (522);
the sum of the cross-sectional areas of all the branch pipes (521) is smaller than the cross-sectional area of the manifold pipe (522).
12. The concrete piston of claim 11,
the V-shaped sand suction ports are positioned on the same circumference, and the central angles between every two adjacent V-shaped sand suction ports are equal; the included angle between every two adjacent branch pipes (521) is equal.
13. The concrete piston of claim 11,
the sand discharge device further comprises a slag suction port (55) arranged at the bottom of the chamber (3), and the slag suction port (55) is communicated with the collecting pipe (522) through a pipeline.
14. The concrete piston of claim 13,
the slag suction port (55) is communicated with the collecting pipe (522) through a slag suction pipe (551) arranged in the main piston (23);
the sum of the cross-sectional area of all the branch pipes (521) and the area of the slag suction port (55) is smaller than the cross-sectional area of the collecting pipe (522).
15. Concrete piston according to any one of claims 10 to 14,
the sand sucker (53) is provided with a hoisting mechanism (56), and the sand sucking main pipe (523) is wound on the hoisting mechanism (56).
16. Concrete piston according to claim 8 or 9,
the sand suction port (51) is a circular hole formed in the wear-resistant ring (4), a plurality of wear-resistant brushes (41) which are in interference fit with the inner wall surface of the conveying cylinder (1) are arranged on the wear-resistant ring (4) in parallel along the axial direction of the concrete piston, and the sand suction port (51) is formed in one side, close to the front piston, of each wear-resistant brush (41);
a plurality of groups of radial holes (524) and at least one axial hole (525) are arranged in the connecting rod (22), the opening of each radial hole (524) is communicated with the sand suction port (51) of the wear-resistant ring (4), and the other end of each radial hole (524) is communicated with the axial hole (525);
a connecting pipe (526) is arranged in the main piston (23), one end of the connecting pipe (526) is connected with the axial hole (525), and the other end of the connecting pipe (526) is communicated with a sand suction main pipe (523).
17. A concrete delivery apparatus, comprising a concrete piston according to any one of claims 1 to 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210101472.7A CN102619977B (en) | 2012-04-09 | 2012-04-09 | Novel concrete piston and concrete transporting device having same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210101472.7A CN102619977B (en) | 2012-04-09 | 2012-04-09 | Novel concrete piston and concrete transporting device having same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102619977A CN102619977A (en) | 2012-08-01 |
| CN102619977B true CN102619977B (en) | 2015-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210101472.7A Active CN102619977B (en) | 2012-04-09 | 2012-04-09 | Novel concrete piston and concrete transporting device having same |
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| Country | Link |
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| CN (1) | CN102619977B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6290475B1 (en) * | 2000-03-30 | 2001-09-18 | Jerry M. Snow | Helical wiper for sucker rod pump |
| DE20319933U1 (en) * | 2003-12-23 | 2004-04-01 | Hansen, Christoph | Pump for sludge and gravel has a double piston with floating disc valves to create a water piston effect for improved pumping efficiency |
| CN200971848Y (en) * | 2006-11-20 | 2007-11-07 | 冯春国 | Corrosion-proof sand-proof underground beam unit |
| CN101294445B (en) * | 2008-06-26 | 2010-04-21 | 三一重工股份有限公司 | Concrete piston and concrete conveying apparatus with the concrete piston |
| CN202579160U (en) * | 2012-04-09 | 2012-12-05 | 三一重工股份有限公司 | Novel concrete piston and concrete conveying device with novel concrete piston |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS606082A (en) * | 1983-06-23 | 1985-01-12 | Itsumi Kawa | Method and device for sending pressure-sent body by pressure |
| US6568925B2 (en) * | 2001-03-28 | 2003-05-27 | Eric Gunderson | Abrasive liquid pump apparatus and method |
| US20080257143A1 (en) * | 2007-04-17 | 2008-10-23 | Leman William W | Methods and apparatus for a fluid or slurry pump piston |
| NO329730B1 (en) * | 2007-10-17 | 2010-12-13 | Tts Sense Mud As | Piston Pump |
| CN201096081Y (en) * | 2007-11-09 | 2008-08-06 | 刘延林 | Sandproof descaling oil pump |
-
2012
- 2012-04-09 CN CN201210101472.7A patent/CN102619977B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6290475B1 (en) * | 2000-03-30 | 2001-09-18 | Jerry M. Snow | Helical wiper for sucker rod pump |
| DE20319933U1 (en) * | 2003-12-23 | 2004-04-01 | Hansen, Christoph | Pump for sludge and gravel has a double piston with floating disc valves to create a water piston effect for improved pumping efficiency |
| CN200971848Y (en) * | 2006-11-20 | 2007-11-07 | 冯春国 | Corrosion-proof sand-proof underground beam unit |
| CN101294445B (en) * | 2008-06-26 | 2010-04-21 | 三一重工股份有限公司 | Concrete piston and concrete conveying apparatus with the concrete piston |
| CN202579160U (en) * | 2012-04-09 | 2012-12-05 | 三一重工股份有限公司 | Novel concrete piston and concrete conveying device with novel concrete piston |
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| Publication number | Publication date |
|---|---|
| CN102619977A (en) | 2012-08-01 |
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