CN101865127A - Pumping device and piston of conveying cylinder thereof - Google Patents
Pumping device and piston of conveying cylinder thereof Download PDFInfo
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- CN101865127A CN101865127A CN201010205708A CN201010205708A CN101865127A CN 101865127 A CN101865127 A CN 101865127A CN 201010205708 A CN201010205708 A CN 201010205708A CN 201010205708 A CN201010205708 A CN 201010205708A CN 101865127 A CN101865127 A CN 101865127A
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Abstract
The invention discloses a piston of a conveying cylinder, which comprises a piston body (1) and a sealing body (3) fitted with the conveying cylinder and is characterized in that the sealing body (3) has a ring-shaped structure; a booster cavity (4) is arranged between the piston body (1) and the sealing body (3); and a valve port (5) is arranged on the booster cavity (4), so that fluid can be loaded into the booster cavity (4) via the valve port (5). The piston provided by the invention is capable of adjusting the pressure of the booster cavity (4), 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 (3) can meet the functional requirement for the sealing performance by increasing the pressure of the booster cavity (4) 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
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, comprise piston only and the seal that cooperates with the conveying cylinder, it is characterized in that, described seal is a ring structure, be provided with booster cavity between described piston only and described seal, described booster cavity is provided with valve nozzle, charges into fluid by described valve nozzle to described booster cavity.
Preferably, described seal cooperates with described piston only, forms the booster cavity of sealing.
Preferably, be provided with the inner tube of a tyre between described piston only and the described seal, the described inner tube of a tyre is a ring structure, and described booster cavity is formed by the described inner tube of a tyre, and described valve nozzle is installed on the described inner tube of a tyre.
Preferably, described valve nozzle comprises delivery pipe and spool, and delivery pipe is connected with described booster cavity, and described spool is installed in the delivery pipe for charge into the valve of fluid to described booster cavity.
Preferably, described seal and described piston only auxiliary section are provided with the elastic support circle that is used for fixing described seal, in corresponding described piston only portion, are provided with the groove of the elastic support circle that is used for fixing described seal.
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 rubber layer that is positioned at described seal inner surface layer, stress frame layer between described sealing surface layer and the described rubber layer, 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 booster cavity internal surface is a rubber layer, and described sealing surface layer, stress frame layer are formed by rubber bond.
Preferably, described fluid is air or nitrogen.
Preferably, also comprise the connecting rod that is used to connect piston rod, described connecting rod is connected with described piston only, and described seal is between described connecting rod and described piston only.
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 and the piston only that comprise and carry cylinder to cooperate are provided with booster cavity and charge into the valve nozzle of fluid to booster cavity between seal and the piston only.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 booster cavity pressure 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, seal cooperates with piston only, forms the booster cavity of sealing.Seal and piston only auxiliary section are provided with the elastic support circle that is used for fixing seal, in corresponding piston only portion, are provided with the groove of the elastic support circle that is used for fixing described seal.The setting of elastic support circle is fixing for sealing performance that improves booster cavity and enhanced leaktightness body.
In a kind of preferred implementation, be provided with the inner tube of a tyre between piston only and the described seal, the inner tube of a tyre is a ring structure, and booster cavity is formed by the described inner tube of a tyre, and valve nozzle is installed on the inner tube of a tyre.The inner tube of a tyre is made by rubber, as air tube, offers certain rigidity of Sealing and elastic performance.It is simple in structure, low cost of manufacture.
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 inner tube of a tyre or piston only or the seal, charge 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 booster cavity, 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 rubber layer that is positioned at the seal inner surface layer, stress frame layer between described sealing surface layer and the described rubber layer, 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, rubber layer, sealing surface layer, stress frame layer are formed by rubber bond, have improved the mechanical property and the elastic energy of seal.
In a kind of preferred implementation, piston of conveying cylinder also comprises the connecting rod that is used to connect piston rod, and connecting rod is connected with piston only, and seal is between connecting rod and piston only.Connecting rod also is used for seal is fixed, and improves the qualitative and booster cavity sealability of size original text of 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 piston only 1, the seal 3, the connecting rod 2 that cooperate with the conveying cylinder, seal 3 cooperates with piston only 1, 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.Seal 3 and piston only 1 auxiliary section, and connecting rod 2 auxiliary sections are provided with the elastic support circle 30 that is used for fixing seal 3, at corresponding piston only 1, are provided with the groove 10 of the elastic support circle 30 that is used for fixing seal 3.Form booster cavity 4 between piston only 1 and seal 3, piston only 1 is provided with valve nozzle 5, charges into to booster cavity 4 by valve nozzle 5.Fluid can be gas or liquid, optimal selection air or nitrogen.
Valve nozzle 5 can directly be installed on seal 3 or the piston only 1, charges into fluid to booster cavity 4 for convenience, also valve nozzle 5 can be guided to outside the piston only 1.For valve nozzle 5 is guided to outside the piston only 1, valve nozzle 5 comprises delivery pipe 50 and spool 51, and delivery pipe 50 is connected with piston only 1, and spool 51 is installed in the delivery pipe 50 for charge into the valve of fluid to booster cavity 4.
In order better to improve its sealability, seal 3 is provided with first seal lip 31 and second lip of seal 32.Lubrication between enhanced leaktightness body 3 and the conveying cylinder is provided with oil storage tank 33 between first seal lip 31 and second lip of seal 32.Under normal assembling situation, first seal lip 31 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, 31 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 4 and valve nozzle 5, 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 booster cavity pressure 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 4 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, in order to improve the sealability of booster cavity 4, between seal 3 and piston only 1, be provided with the inner tube of a tyre 6, the inner tube of a tyre 6 is equivalent to the same structure of bicycle tyre, booster cavity 4 is formed by the inner tube of a tyre 6, simplify the piston of conveying cylinder structure, improve the sealability of booster cavity 4, impel the sealability between piston only 1 and the seal 3 to require unrestricted.
In another kind of preferred implementation, please refer in the third embodiment of Fig. 4, seal 3 is by forming with the rubber layer 301 that the sealing surface layer 300 of carrying cylinder to cooperate and seal 3 internal surfaces are good seal performance.Rubber layer 301 is in order to improve the sealability of booster cavity 4, 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.
Also can between rubber layer 301 and sealing surface layer 300, 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 (12)
1. piston of conveying cylinder, comprise piston only (1) and the seal (3) that cooperates with the conveying cylinder, it is characterized in that, described seal (3) is a ring structure, between described piston only (1) and described seal (3), be provided with booster cavity (4), described booster cavity (4) is provided with valve nozzle (5), charges into fluid by described valve nozzle (5) to described booster cavity (4).
2. piston of conveying cylinder according to claim 1 is characterized in that, described seal (3) cooperates with described piston only (1), forms the booster cavity (4) of sealing.
3. piston of conveying cylinder according to claim 1, it is characterized in that, be provided with the inner tube of a tyre (6) between described piston only (1) and the described seal (3), the described inner tube of a tyre (6) is a ring structure, described booster cavity (4) is formed by the described inner tube of a tyre (6), and described valve nozzle (5) is installed on the described inner tube of a tyre (6).
4. according to any described piston of conveying cylinder of claim 1 to 3, it is characterized in that, described valve nozzle (5) comprises delivery pipe (50) and spool (51), delivery pipe (50) is connected with described booster cavity (4), described spool (51) is installed in the delivery pipe (50) for charge into the valve of fluid to described booster cavity (4).
5. according to any described piston of conveying cylinder of claim 1 to 3, it is characterized in that, described seal (3) and described piston only (1) auxiliary section, be provided with the elastic support circle (30) that is used for fixing described seal (3), in corresponding described piston only (1) portion, be provided with the groove (10) of the elastic support circle (30) that is used for fixing described seal (3).
6. according to any described piston of conveying cylinder of claim 1 to 3, it 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 (31).
7. piston of conveying cylinder according to claim 6 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 (33) between described first seal lip (31) and the described second lip of seal (32).
8. piston of conveying cylinder according to claim 6, it is characterized in that, described seal (3) also comprises the rubber layer (301) of seal inner surface layer, be positioned at the stress frame layer (302) between described sealing surface layer (300) and the rubber layer (301), 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.
9. piston of conveying cylinder according to claim 8 is characterized in that, described sealing surface layer (300) is made by teflon or graphite material, and described sealing surface layer (300), stress frame layer (302) are formed by rubber bond.
10. according to any described piston of conveying cylinder in the claim 1 to 3, it is characterized in that described fluid is air or nitrogen.
11. according to any described piston of conveying cylinder in the claim 1 to 3, it is characterized in that, also comprise the connecting rod (2) that is used to connect piston rod, described connecting rod (2) is connected with described piston only (1), and described seal (3) is positioned between described connecting rod (2) and the described piston only (1).
12. a pumping equipment is characterized in that, comprises as each described piston of conveying cylinder of claim 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102057082A CN101865127B (en) | 2010-06-22 | 2010-06-22 | Pumping device and piston of conveying cylinder thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102057082A CN101865127B (en) | 2010-06-22 | 2010-06-22 | Pumping device and piston of conveying cylinder thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101865127A true CN101865127A (en) | 2010-10-20 |
| CN101865127B CN101865127B (en) | 2012-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102057082A Active CN101865127B (en) | 2010-06-22 | 2010-06-22 | Pumping device and piston of conveying cylinder thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN101865127B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321892A (en) * | 2013-05-29 | 2013-09-25 | 三一汽车制造有限公司 | Elastic piston and pumping system and engineering machine with elastic piston |
| 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 |
| CN107905980A (en) * | 2017-11-14 | 2018-04-13 | 江西风石压缩机有限公司 | A kind of air compressor piston |
| CN108302032A (en) * | 2018-02-12 | 2018-07-20 | 惠州海卓科赛医疗有限公司 | A kind of elastic piston, high-pressure pumping system and method |
| CN108317249A (en) * | 2018-03-15 | 2018-07-24 | 惠州海卓科赛医疗有限公司 | A kind of elastic piston sealing structure and medical high-pressure pumping system |
| WO2019153955A1 (en) * | 2018-02-12 | 2019-08-15 | 惠州海卓科赛医疗有限公司 | Elastic piston and high-pressure pumping system |
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| CN2392006Y (en) * | 1999-06-23 | 2000-08-16 | 魏建宏 | Internal pressure type expansion piston |
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| GB1206507A (en) * | 1967-05-29 | 1970-09-23 | Stiga Verken Ab | Double acting fluid pump |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321892A (en) * | 2013-05-29 | 2013-09-25 | 三一汽车制造有限公司 | Elastic piston and pumping system and engineering machine with elastic piston |
| 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 |
| CN107905980A (en) * | 2017-11-14 | 2018-04-13 | 江西风石压缩机有限公司 | A kind of air compressor piston |
| CN107905980B (en) * | 2017-11-14 | 2019-12-13 | 江西风石压缩机有限公司 | Air compressor piston |
| CN108302032A (en) * | 2018-02-12 | 2018-07-20 | 惠州海卓科赛医疗有限公司 | A kind of elastic piston, high-pressure pumping system and method |
| WO2019153955A1 (en) * | 2018-02-12 | 2019-08-15 | 惠州海卓科赛医疗有限公司 | Elastic piston and high-pressure pumping system |
| JP2021513627A (en) * | 2018-02-12 | 2021-05-27 | 恵州海卓科賽医療有限公司Ｈｕｉｚｈｏｕ Ｈｙｄｒｏ Ｃａｒｅｓｙｓ Ｍｅｄｉｃａｌ Ｃｏ．， Ｌｔｄ． | Elastic piston and high pressure pumping system |
| JP7082675B2 (en) | 2018-02-12 | 2022-06-08 | 恵州海卓科賽医療有限公司 | Elastic piston and high pressure pumping system |
| CN108317249A (en) * | 2018-03-15 | 2018-07-24 | 惠州海卓科赛医疗有限公司 | A kind of elastic piston sealing structure and medical high-pressure pumping system |
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| Publication number | Publication date |
|---|---|
| CN101865127B (en) | 2012-09-05 |
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