CN101865105A - Pumping device and piston of conveying cylinder thereof - Google Patents

Pumping device and piston of conveying cylinder thereof Download PDF

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Publication number
CN101865105A
CN101865105A CN 201010205709 CN201010205709A CN101865105A CN 101865105 A CN101865105 A CN 101865105A CN 201010205709 CN201010205709 CN 201010205709 CN 201010205709 A CN201010205709 A CN 201010205709A CN 101865105 A CN101865105 A CN 101865105A
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CN
China
Prior art keywords
piston
seal
conveying cylinder
layer
sealing
Prior art date
Application number
CN 201010205709
Other languages
Chinese (zh)
Inventor
唐维铁
Original Assignee
三一重工股份有限公司
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by 三一重工股份有限公司 filed Critical 三一重工股份有限公司
Priority to CN 201010205709 priority Critical patent/CN101865105A/en
Publication of CN101865105A publication Critical patent/CN101865105A/en

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Abstract

The invention discloses a piston of a conveying cylinder, which comprises a sealing body (3) fitted with the conveying cylinder and is characterized in that a booster cavity (30) and a valve port (31) are arranged in the sealing body, wherein fluid can be loaded into the booster cavity (31) via the valve port (31). The invention further discloses a pumping device comprising the piston of the conveying cylinder. The piston provided by the invention is capable of adjusting the pressure of the booster cavity (30), thus adjusting and improving the rigidity of the piston of the conveying cylinder, improving the sealing performance and facilitating the installation of the piston of the conveying cylinder; the sealing body can meet the functional requirement for the sealing performance by increasing the pressure of the booster cavity (30) even if the sealing body (3) is worn, thus prolonging the service life of the sealing body (3) and even the entire piston of the conveying cylinder; and the piston of the invention has the advantages of simple structure and low manufacturing cost.

Description

A kind of pumping equipment and piston of conveying cylinder thereof
Technical field
The present invention relates to a kind of piston of conveying cylinder of pumping equipment, particularly relate to a kind of piston of conveying cylinder of concrete pumping equipment.
Background technique
Piston of conveying cylinder is the critical component in the pumping equipment, along with the to-and-fro motion of piston in carrying cylinder, concrete, silt, water or other fluid thing is pressed in the conveyance conduit, and therefore, the performance of piston directly affects the performance of pumping equipment.
For example in the working procedure of concrete pumping equipment, piston rod drives piston motion under the effect of hydraulic oil, so with the transmission and concrete transmission in the piston cylinder to conveyance conduit, and it is on-the-spot to deliver to cast by conveyance conduit.In this process, piston axis along piston in piston cylinder moves reciprocatingly, its working environment very severe: not only need to bear for a long time the high pressure of 6MPa to 30MPa and-40 ℃ to the operating temperature more than 100 ℃, and be in for a long time in the immersion of slime water, caused the damage of piston, the mechanical property and the elastic performance of piston of conveying cylinder are descended, thereby cause and carry the sealability of cylinder to descend, can't proper functioning.
Because the particularity of the piston of conveying cylinder working environment of concrete pumping equipment, in order to address the above problem, prior art provides a kind of piston of conveying cylinder of concrete pumping equipment of improvement, and it is described to please refer to Fig. 1:
The piston of conveying cylinder that the prior art provides comprises sealed member 22, and sealed member 22 is fixed between pressing plate 23 and the piston rod 21, and pressing plate 23 is fixed by bolt and piston rod, thereby sealed member 22 is stuck between the two.Sealed member 22 comprises elastic skeleton part 221 and covered section 222, and elastic skeleton part 221 is fixed in the inside of covered section 222, and covered section 222 is played a supportive role, and improves the mechanical property and the elastic performance of covered section 222.Thereby improve its sealability, prolong piston of conveying cylinder working life.
But there is following shortcoming in this technological scheme: one, the mechanical property of covered section 222 and elastic performance are unadjustable.After covered section 222 wearing and tearing, its mechanical property and elastic performance can descend, thereby can influence its sealability and working life; Two, this piston of conveying cylinder is forced to be pressed into by pressure unit and is carried in the cylinder, because piston of conveying cylinder is provided with elastic skeleton part 221, it is very difficult to cause pressure to be pressed in the conveying cylinder, and it installs very inconvenient; Three, elastic skeleton part 221 only has only the elastic force of the two lip portions that improve sealed member 22, do not improve the elastic force of sealed member 22 all directions, promptly do not improve the coordinate force between sealed member and the conveying cylinder, after two lip portions of sealed member 22 are worn, this piston of conveying cylinder just can not play seal action, thereby can influence its working life.Four, elastic skeleton part 221 is destroyed covered sections 222 easily, because the elastic force of elastic skeleton part 221 is not impartial load, but concentrated load is easy to cause covered section 222 like this, destroys under the effect of the elastic force of elastic skeleton part 221.Five, complex structure, manufacture cost height.
Therefore, one, the rigidity and the elastic performance that how to keep piston of conveying cylinder for a long time, and can be according to the needs of actual fed pressure and the needs of sealability, and after the piston of conveying cylinder wearing and tearing, sealability descends, can regulate the rigidity and the elastic performance of piston of conveying cylinder at any time, prolong the working life of the sealed member of piston of conveying cylinder.Two, how to make things convenient for piston of conveying cylinder is installed to and carry in the cylinder, improve the piston of conveying cylinder installation capability.Three, how to improve the piston of conveying cylinder structure, reduce manufacture cost, the Economy that improves in the piston using process is the present technical issues that need to address of those skilled in the art.
Summary of the invention
The purpose of this invention is to provide a kind of piston of conveying cylinder, this piston has rigidity and the elastic performance that keeps piston of conveying cylinder for a long time, and can be according to the needs of actual fed pressure and the needs of sealability, and after the piston of conveying cylinder wearing and tearing, sealability descends, can regulate the rigidity and the elastic performance of piston of conveying cylinder at any time, prolong the working life of the sealed member of piston of conveying cylinder.And be convenient to the piston of conveying cylinder installation, and simple in structure, low cost of manufacture.
Another object of the present invention provides a kind of pumping equipment that comprises above-mentioned piston of conveying cylinder.
For solving the problems of the technologies described above, the invention provides a kind of piston of conveying cylinder, the seal that comprises and carry cylinder to cooperate is characterized in that, is provided with booster cavity in the described seal and charges into the valve nozzle of fluid to described booster cavity.Described seal is a ring structure, and described booster cavity is the sealed cavity around the portion's formation within it of described seal axis.
Preferably, described valve nozzle comprises delivery pipe and spool, and delivery pipe is connected with described seal, and described spool is installed in the delivery pipe for charge into the valve of fluid to described booster cavity.
Preferably, described seal comprises and the sealing surface layer of carrying cylinder to cooperate that the front end of described sealing surface layer is provided with first seal lip.
Preferably, the rear end of described sealing surface layer is provided with second lip of seal, is provided with oil storage tank between described first seal lip and the described second lip of seal.
Preferably, described seal also comprises the stress frame layer between described sealing surface layer and booster cavity, described stress frame layer is resilient metal member or is hangings lay, the steel band cord that layer of cloth that described hangings lay is made up of the kiss-coating tyre cord and/or steel wire are weaved into forms by arranged side by side and/or oblique line intercross arrangement.
Preferably, described sealing surface layer is made by teflon or graphite material, and described seal internal surface is a rubber layer, and described sealing surface layer, stress frame layer are formed by rubber bond.
Preferably, described gas is air or nitrogen.
Preferably, also comprise piston only and connecting rod, described seal is between described piston only and connecting rod, and described piston only is connected with connecting rod, fixing described seal.
For solving the problems of the technologies described above, the present invention also provides a kind of pumping equipment, comprises as above-mentioned each described piston of conveying cylinder.
A kind of piston of conveying cylinder provided by the invention not only can be used for concrete pumping equipment, can also be used for silt, water, the various conveying equipment for fluid substances of wet goods, as the piston of hydraulic jack, piston of plunger water pump or the like.
A kind of piston of conveying cylinder provided by the invention, the seal that comprises and carry cylinder to cooperate is provided with booster cavity and charges into the valve nozzle of fluid to booster cavity in the seal.The setting of booster cavity has not only improved the rigidity and the elastic performance of whole seal, and can be according to the needs of actual fed pressure and the needs of sealability, and after the piston of conveying cylinder wearing and tearing, sealability descends, can regulate the pressure of booster cavity at any time, thereby regulate the rigidity and the elastic performance of piston of conveying cylinder, prolong the working life of the sealed member of piston of conveying cylinder.In the installation of seal and the installation process of piston of conveying cylinder, at first be in place, and then booster cavity is charged into gas and liquid, improve its rigidity and elastic performance, install very conveniently like this, do not need directly to be pressed into.Structure is also very simple, low cost of manufacture.Seal can be by high-abrasive material, as: teflon or graphite material, also can make by multilayer material, the sealing surface layer is made by high-abrasive material, and other is made by rubber.Fluid can be a gas, also can be liquid.Optimal selection air or nitrogen.
In a kind of preferred implementation, first seal lip and the second lip of seal of seal provided by the present invention, be in order better to improve its sealability, being provided with oil storage tank between first seal lip and the second lip of seal, is for the lubrication between enhanced leaktightness body and the conveying cylinder.Under normal assembling situation, first seal lip mainly plays sealing and pressure transmission effect, be subjected to bigger frictional force, and second lip of seal is positioned at the rear end of piston body, the main dustproof effect that rises, the active force that is subjected to is less, and it is lighter to wear and tear, therefore, when the first seal lip sealability descends, second lip of seal still has the better seal performance, at this moment, just piston body can be turned over turnback and assemble, bear the effect of sealing and pressure transmission by second lip of seal, like this, can further prolong the working life of piston body, improve the Economy in the using process of piston body; On the other hand, the setting of second lip of seal, can make the intermediate portion and the piston cylinder of piston body form an airtight cavity, thereby guarantee that lubricant oil remains in the cavity for a long time, sealed member is lubricated, reduce friction and give birth to heat, reduce the rate of wear of sealed member, prolong the working life of sealed member.
In a kind of preferred implementation, the valve nozzle that provides of the present invention, valve nozzle can directly be installed on the seal, charges into fluid to booster cavity for convenience, also valve nozzle can be guided to outside the piston body.So valve nozzle comprises delivery pipe and spool, delivery pipe is connected with seal, and spool is installed in the delivery pipe for charge into the valve of fluid to booster cavity.
In a kind of preferred implementation, the seal that provides of the present invention, seal also comprises the stress frame layer between sealing surface layer and booster cavity, the stress frame layer is resilient metal member or is hangings lay, the steel band cord that layer of cloth that hangings lay is made up of the kiss-coating tyre cord and/or steel wire are weaved into forms by arranged side by side and/or oblique line intercross arrangement.This is in order to improve seal dimensional stability and mechanical property, prevent of the damage of hard material such as sandstone to seal, in order to improve the wear-resisting property of seal, the sealing surface layer is made by teflon or graphite material, in order to improve the sealability of booster cavity, the booster cavity internal surface is a rubber layer, and sealing surface layer, hangings lay are formed by rubber bond, have improved the mechanical property and the elastic energy of seal.
In a kind of preferred implementation, the piston of conveying cylinder that provides of the present invention also comprises piston only and connecting rod, and seal is between piston only and connecting rod, and piston only is connected with connecting rod, fixing seal body, the dimensional stability of raising seal.
The beneficial effect of pumping equipment provided by the present invention and the beneficial effect of piston of conveying cylinder are similar, do not repeat them here.
Description of drawings
Fig. 1 is the structural representation of a kind of piston of conveying cylinder in the prior art;
Fig. 2 is a kind of piston of conveying cylinder provided by the present invention, the structural representation of first kind of embodiment;
Fig. 3 is a kind of piston of conveying cylinder provided by the present invention, the structural representation of second kind of embodiment;
Fig. 4 is a kind of piston of conveying cylinder provided by the present invention, the structural representation of the third embodiment.
Embodiment
In order to make those skilled in the art person understand technical solution of the present invention better, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer in first kind of embodiment of Fig. 2, piston of conveying cylinder provided by the present invention comprises and seal 3, piston only 1, the connecting rod 2 of carrying cylinder to cooperate, seal 3 is between piston only 1 and connecting rod 2, piston only 1 and connecting rod 2 are connected by bolt, fixing seal body 3 is guaranteed seal 3 dimensional stabilitys.Seal 3 is a ring structure, is provided with booster cavity 30 in seal 3, and booster cavity 30 is ring structure for the sealed cavity around the portion's formation within it of seal 3 axis.
Also comprise the valve nozzle 31 that charges into fluid to booster cavity 30, fluid can be a gas, also can be liquid.Optimal selection air or nitrogen.Valve nozzle 31 can directly be installed on the seal 3, charges into fluid to booster cavity 30 for convenience, also valve nozzle 31 can be guided to outside the piston body.For valve nozzle 31 is guided to outside the piston body, valve nozzle 31 comprises delivery pipe 322 and spool 311, and delivery pipe 322 is connected with seal 3, and spool 311 is installed in the delivery pipe 322 for charge into the valve of fluid to booster cavity 30.
In order better to improve its sealability, seal 3 is provided with first seal lip 33 and second lip of seal 32.Lubrication between enhanced leaktightness body 3 and the conveying cylinder is provided with oil storage tank 34 between first seal lip 33 and second lip of seal 32.Under normal assembling situation, first seal lip 33 mainly plays sealing and pressure transmission effect, be subjected to bigger frictional force, and second lip of seal 32 is positioned at the rear end of piston body, the main dustproof effect that rises, the active force that is subjected to is less, and it is lighter to wear and tear, therefore, when first seal lip, 33 sealabilities descend, second lip of seal 32 still has the better seal performance, at this moment, just piston body can be turned over turnback and assemble, bear the effect of sealing and pressure transmission by second lip of seal 32, like this, can further prolong the working life of piston body, improve the Economy in the using process of piston body; On the other hand, the setting of second lip of seal 32, can make the intermediate portion and the piston cylinder of piston body form an airtight cavity, thereby guarantee that lubricant oil remains in the cavity for a long time, seal 3 is lubricated, reduce friction and give birth to heat, reduce the rate of wear of seal 3, prolong the working life of seal 3.
In first kind of embodiment of the present invention, the setting of booster cavity 30 and valve nozzle 31, the rigidity and the elastic performance of whole seal 3 have not only been improved, and can be according to the needs of actual fed pressure and the needs of sealability, and after the piston of conveying cylinder wearing and tearing, sealability descends, and can regulate the pressure of booster cavity 30 at any time, thereby regulate the rigidity and the elastic performance of piston of conveying cylinder, prolong the working life of the sealed member of piston of conveying cylinder.In the installation of seal 3 and the installation process of piston of conveying cylinder, at first be in place, and then booster cavity 30 is charged into gas and liquid, optimum charges into nitrogen, improves its rigidity and elastic performance, installs very conveniently like this, does not need directly to be pressed into.Structure is also very simple, low cost of manufacture.Seal 3 can be made by high-abrasive material, as: teflon or graphite material etc.
In another kind of preferred implementation, please refer in second kind of embodiment of Fig. 3, seal 3 is by forming with the sealing surface layer 300 of carrying cylinder to cooperate and the rubber layer 301 of seal 3 internal surfaces.Rubber layer 301 is in order to improve the sealability of booster cavity 30, to improve the elastic performance of whole seal 3.Sealing surface layer 300 is made by teflon or graphite material, improves and the piston of conveying cylinder wear-resisting property.
In another kind of preferred implementation, please refer in the third embodiment of Fig. 4, seal 3 by with the sealing surface layer 300 of carrying cylinder to cooperate and the rubber layer 301 of seal 3 internal surfaces, and rubber layer 301 and seal between the surface layer 300 and also be provided with stress frame layer 302.It is in order to improve seal dimensional stability and mechanical property, to prevent the damage of hard material such as sandstone to seal 3 that stress frame layer 302 is set.
Stress frame layer 302 can be a resilient metal member, also can be to arrange the same hangings lay with automobile tire, and the steel band cord that layer of cloth that hangings lay is made up of the kiss-coating tyre cord and/or steel wire are weaved into forms by arranged side by side and/or oblique line intercross arrangement.
Except above-mentioned piston of conveying cylinder, the present invention also provides a kind of pumping equipment that comprises above-mentioned piston of conveying cylinder, and the structure of these other each several parts of pumping equipment please refer to prior art, and this paper repeats no more.
The foregoing description only is a preferred implementation of the present invention; should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from principle of the present invention; can also make some equivalents, these equivalents all should be considered as protection scope of the present invention.

Claims (10)

1. piston of conveying cylinder, the seal (3) that comprises and carry cylinder to cooperate is characterized in that, is provided with booster cavity (30) in the described seal (3) and charges into the valve nozzle (31) of fluid to described booster cavity (30).
2. piston of conveying cylinder according to claim 1 is characterized in that, described seal (3) is a ring structure, and described booster cavity (30) is the sealed cavity around the portion's formation within it of described seal (3) axis.
3. piston of conveying cylinder according to claim 2, it is characterized in that, described valve nozzle (31) comprises delivery pipe (322) and spool (311), delivery pipe (322) is connected with described seal (3), described spool (311) is installed in the delivery pipe (322) for charge into the valve of fluid to described booster cavity (30).
4. piston of conveying cylinder according to claim 2 is characterized in that, described seal (3) comprises and the sealing surface layer (300) of carrying cylinder to cooperate that the front end of described sealing surface layer (300) is provided with first seal lip (33).
5. piston of conveying cylinder according to claim 4 is characterized in that, the rear end of described sealing surface layer (300) is provided with second lip of seal (32), is provided with oil storage tank (34) between described first seal lip (33) and the described second lip of seal (32).
6. according to claim 4 or 5 any described piston of conveying cylinder, it is characterized in that, described seal (3) also comprises the stress frame layer (302) that is positioned between described sealing surface layer (300) and the booster cavity (30), described stress frame layer (302) is resilient metal member or is hangings lay, the steel band cord that layer of cloth that described hangings lay is made up of the kiss-coating tyre cord and/or steel wire are weaved into forms by arranged side by side and/or oblique line intercross arrangement.
7. piston of conveying cylinder according to claim 6, it is characterized in that, described sealing surface layer (300) is made by teflon or graphite material, and described seal (3) internal surface is rubber layer (301), and described sealing surface layer (300), stress frame layer (302) are formed by rubber bond.
8. piston of conveying cylinder according to claim 1 or 5 is characterized in that described fluid is air or nitrogen.
9. piston of conveying cylinder according to claim 1 or 5, it is characterized in that, also comprise piston only (1) and connecting rod (2), described seal (3) is positioned between described piston only (1) and the connecting rod (2), described piston only (1) is connected with connecting rod (2), fixing described seal (3).
10. a pumping equipment is characterized in that, comprises as each described piston of conveying cylinder of claim 1 to 9.
CN 201010205709 2010-06-22 2010-06-22 Pumping device and piston of conveying cylinder thereof CN101865105A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201010205709 CN101865105A (en) 2010-06-22 2010-06-22 Pumping device and piston of conveying cylinder thereof

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Application Number Priority Date Filing Date Title
CN 201010205709 CN101865105A (en) 2010-06-22 2010-06-22 Pumping device and piston of conveying cylinder thereof

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CN101865105A true CN101865105A (en) 2010-10-20

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102606473A (en) * 2012-04-01 2012-07-25 三一重工股份有限公司 Adaptive concrete piston and concrete conveying device
WO2014190863A1 (en) * 2013-05-29 2014-12-04 湖南三一智能控制设备有限公司 Elastic piston, pumping system and engineering machine
CN104832424A (en) * 2014-12-19 2015-08-12 北汽福田汽车股份有限公司 Concrete piston, pumping device adopting same and pump truck
CN105587713A (en) * 2016-01-29 2016-05-18 管中林 Sealing-pressure-adjustable hydraulic seal piston device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB115281A (en) * 1900-01-01
GB372607A (en) * 1931-06-26 1932-05-12 Kurt Schoene Improvements in packings for the moving parts of pumps for liquids
GB455943A (en) * 1935-09-14 1936-10-30 Hay Smith Piston packing rings
US3094904A (en) * 1961-07-11 1963-06-25 James W Healy Mud pump pistons
CN2509383Y (en) * 2001-08-15 2002-09-04 南京奥亿达液压气动技术有限公司 Reciprocating self-reversing seal piston apparatus
CN101531331A (en) * 2008-03-12 2009-09-16 北京纽希液压技术研究所 Novel hydraulic lifting jack
CN101660521A (en) * 2009-08-31 2010-03-03 三一重工股份有限公司 Concrete pumping equipment and piston body thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB115281A (en) * 1900-01-01
GB372607A (en) * 1931-06-26 1932-05-12 Kurt Schoene Improvements in packings for the moving parts of pumps for liquids
GB455943A (en) * 1935-09-14 1936-10-30 Hay Smith Piston packing rings
US3094904A (en) * 1961-07-11 1963-06-25 James W Healy Mud pump pistons
CN2509383Y (en) * 2001-08-15 2002-09-04 南京奥亿达液压气动技术有限公司 Reciprocating self-reversing seal piston apparatus
CN101531331A (en) * 2008-03-12 2009-09-16 北京纽希液压技术研究所 Novel hydraulic lifting jack
CN101660521A (en) * 2009-08-31 2010-03-03 三一重工股份有限公司 Concrete pumping equipment and piston body thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102606473A (en) * 2012-04-01 2012-07-25 三一重工股份有限公司 Adaptive concrete piston and concrete conveying device
CN102606473B (en) * 2012-04-01 2015-07-01 三一重工股份有限公司 Adaptive concrete piston and concrete conveying device
WO2014190863A1 (en) * 2013-05-29 2014-12-04 湖南三一智能控制设备有限公司 Elastic piston, pumping system and engineering machine
CN104832424A (en) * 2014-12-19 2015-08-12 北汽福田汽车股份有限公司 Concrete piston, pumping device adopting same and pump truck
CN105587713A (en) * 2016-01-29 2016-05-18 管中林 Sealing-pressure-adjustable hydraulic seal piston device

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