CN102410205B - Concrete pumping equipment and concrete piston thereof - Google Patents
Concrete pumping equipment and concrete piston thereof Download PDFInfo
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- CN102410205B CN102410205B CN201110268026.0A CN201110268026A CN102410205B CN 102410205 B CN102410205 B CN 102410205B CN 201110268026 A CN201110268026 A CN 201110268026A CN 102410205 B CN102410205 B CN 102410205B
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Abstract
The invention discloses a concrete piston which comprises a connecting rod and a piston head, wherein the connecting rod and the piston head are articulated through a cup-and-ball joint; and the ball head semicircular surface of the cup-and-ball joint vertical to the center line of the piston head is arranged at the front end of a sealing lip of the piston head. In case of deflection under the action of external force, the concrete piston can restore to the better coaxiality of the piston head and a piston cylinder under the action of smaller restoring force, the wear of the sealing lip of the piston head is reduced, and the service life is prolonged. The invention also discloses concrete pumping equipment comprising the concrete piston.
Description
Technical field
The present invention relates to technical field of engineering machinery, particularly relate to a kind of concrete piston for concrete pumping equipment.In addition, the invention still further relates to a kind of concrete pumping equipment that comprises above-mentioned concrete piston.
Background technique
Along with the fast development of China's economic construction, being on the increase of construction project, market also increases day by day for the demand of concrete equipment.
In process at concrete pumping equipment in pumping, the to-and-fro motion by concrete piston in carrying cylinder is pressed into concrete in conveyance conduit, realizes concrete pumping.
Please refer to Fig. 1, Fig. 1 is the structural representation of a kind of typical concrete piston in prior art.
As shown in FIG., concrete piston of the prior art comprises connecting rod 1 and piston head 2, the two connects by connecting bolt 3, wherein, piston head 2 comprises guide ring 21, piston body 22, concrete seal 23 and telescopic pressing plate 24, one end of connecting rod 1 is connected by connecting bolt with telescopic pressing plate 29, and the other end is connected with piston rod 4.
In working procedure, there are to-and-fro motion in piston rod 4, drive connecting rod 1 and the piston head 2 that is fixedly connected with it in the conveying cylinder of concrete pump to sucking or force feed concrete completes the concrete transport work of concrete pump.
Yet, in actual pumping procedure, between piston head 2 and conveying cylinder, can not keep completely coaxial, thereby in the process that concrete piston is moved reciprocatingly in carrying cylinder, be easy to be subject to the effect of radial effect power, cause the eccentric wear of concrete piston, cause the piston head of concrete pump and the wearing and tearing of carrying cylinder, affect its pump-conveying property, also can cause the time between failures of concrete pump shorter, make the operating cost of concrete pump higher.
For addressing the above problem, the concrete pumping equipment that patent CN200920312334.7 provides a kind of ball joint type concrete piston and comprised this concrete piston, please refer to Fig. 2, the structural representation of the concrete piston that Fig. 2 provides for aforementioned patent.
As shown in FIG., concrete piston comprises connecting rod 1 and piston head 2, the two ends of connecting rod 1 are connected with piston rod 4 with piston head 2 respectively, piston head 2 comprises guide ring 21, piston body 22, concrete seal 23, telescopic pressing plate 24, pressing plate 26 and connecting plate 25, on connecting plate 25, offer ball-and-socket 27, one end that connecting rod 1 is connected with piston head 2 is provided with hemispherical head 11, and hemispherical head 11 cooperatively interacts and is arranged in ball-and-socket 27 with ball-and-socket 27, is also provided with spherical surface hill 12 on connecting rod 1; Connecting rod 1 is connected by connecting bolt 3 with piston head 2, be specially, hemispherical head 11 is positioned at ball-and-socket 27, connecting bolt connects pressing plate 26, connecting plate 25 and telescopic pressing plate 24 successively, the crowning of spherical surface hill 12 is mutually corresponding with the end face of connecting plate 25, and pressing plate 26 and telescopic pressing plate 24 grip guide ring 21, piston body 22 and concrete seal 23.
Thereby in carrying out concrete pumping procedure, piston head 2 can be adjusted automatically according to stressing conditions, thereby guarantee piston head 2 and the coaxality of carrying cylinder, improve the stressing conditions of piston head 2, reduce the wearing and tearing of piston head 2, extend its working life.
Yet, piston head 2 in above-mentioned patent and the articulated position of connecting rod 1 are positioned at the rear end of the seal lip of piston head 2, piston head 2 is travelled forward under the thrust of connecting rod 1, to the effect of concrete applied thrust, and the drag effect that piston head 2 bears in proal process is larger, and piston head and connecting rod are hinged, thereby the moving direction of piston head 2 and seal lip is in an unsure state, be easy to occur have between the moving direction of piston head 2 and connecting rod 1 situation of certain angle, the active force that makes piston rod 4 act on piston head 2 produces the component of radial direction, the point of action of this component is positioned at the seal lip of piston head 2, cause seal lip in the situation that the sidewall of clamping piston cylinder moves, produce the frictional force of piston cylinder to seal lip, cause the wearing and tearing of seal lip.
Please refer to Fig. 3, Fig. 3 produces the stressed schematic diagram after angle for the concrete piston that patent CN200920312334.7 provides under unstable state.
As shown in FIG., in the course of the work, owing to being piston head 2 and being connected of connecting rod 1 stable, do not connect, under concrete effect, piston head 2 also can rotate around articulating point with respect to connecting rod 1, making rotatable portion and the connecting rod 1 formation size of piston head 2 is the angle of θ, due to the articulating point of connecting rod 1 and piston head 2 be positioned at seal lip after, therefore, seal lip and the pressure between piston cylinder of a side identical with sense of rotation can increase, correspondingly, frictional force also increases, now the seal lip of piston head 2 is subject to the pressure N of piston cylinder, be subject to the frictional force F2 of piston cylinder simultaneously.Now, directed force F 1 and the piston cylinder of 1 pair of articulating point of connecting rod form a pair of couple to the frictional force F2 of seal lip, the action direction of this couple further increases piston head 2 and the angle theta of connecting rod 1, thereby the wearing and tearing of aggravation piston head 2 reduce its working life.
Therefore, how to avoid producing angle because of the unstable state of piston head moving direction, thereby avoid causing the radial force of piston cylinder to seal lip because of this angle, or the angle how unstable state of modifying factor piston head moving direction produces returns back to original state, and then avoid the wearing and tearing of seal lip, extend its working life, just become the current technical issues that need to address of those skilled in the art.
Summary of the invention
The object of this invention is to provide a kind of concrete piston, while there is drift angle in this concrete piston under the effect that is subject to external force, can return back to original state at the angle that the unstable state of modifying factor piston head moving direction produces automatically, thereby return to the state that piston head and piston cylinder have good coaxality, and then reduced the wearing and tearing of the seal lip of piston head, extended working life.Another object of the present invention is to provide a kind of concrete pumping equipment that comprises above-mentioned concrete piston.
For solving the problems of the technologies described above, the invention provides a kind of concrete piston, comprise connecting rod and piston head, described connecting rod and piston head are hinged by cup-and-ball joint, and the centre of sphere of described cup-and-ball joint is positioned at the front end of the seal lip of described piston head.
Preferably, the front end of described connecting rod is provided with bulb, the gland of described piston head offers the first half ball-and-sockets that match with the first hemispherical head of described bulb, the bulb pressing plate that is arranged at described connecting rod one side offers the second half ball-and-sockets that match with the second hemispherical head of described bulb, described gland and described bulb pressing plate cooperatively interact, and described bulb is limited in described the first half ball-and-sockets and the second half ball-and-sockets.
Preferably, the centre of sphere of described the first hemispherical head overlaps with the centre of sphere of described the second hemispherical head, and the radius of described the first hemispherical head is less than the radius of described the second hemispherical head, and has predetermined gap between described the second hemispherical head and described gland.
Preferably, the front end of described connecting rod is provided with the 3 half ball-and-socket, the gland of described piston head is provided with the 3rd hemispherical head matching with the madial wall of described the 3 half ball-and-socket, the bulb pressing plate that is arranged at described connecting rod one side is provided with the second half ball-and-sockets that match with the outer side wall of described the 3 half ball-and-socket, described gland and described bulb pressing plate cooperatively interact, and described the 3rd hemispherical head is limited in described the 3 half ball-and-socket.
Preferably, the front end of described connecting rod is provided with the 3 half ball-and-socket, the gland of described piston head is provided with the first half ball-and-sockets that match with described the 3 half ball-and-socket, in described the 3 half ball-and-socket and described the first half ball-and-sockets, be provided with steel ball, the bulb pressing plate that is arranged at described connecting rod one side offers the second half ball-and-sockets that match with the outer side wall of described the 3 half ball-and-socket, and described bulb pressing plate and described gland are limited to described steel ball in described the first half ball-and-sockets and described the second half ball-and-sockets.
Preferably, between the cross section of the sidewall of described the 3 half ball-and-socket and described gland, there is predetermined gap.
Preferably, described bulb pressing plate and described gland are connected by screw.
Preferably, on described connecting rod, offer oil duct, described oil duct is communicated with fuel filler neck and described cup-and-ball joint.
Preferably, described fuel filler neck is positioned at tail end or the side of described connecting rod.
For solving the problems of the technologies described above, the present invention also provides a kind of concrete pumping equipment, comprises piston cylinder and the concrete piston matching with described piston cylinder, and described concrete piston is the concrete piston described in above-mentioned any one.
A kind of concrete piston provided by the present invention, comprises connecting rod and piston head, and connecting rod and piston head are hinged by cup-and-ball joint, and the centre of sphere of the bulb of cup-and-ball joint is positioned at the front end of the seal lip of piston head.Like this, connecting rod is connected by cup-and-ball joint with piston head, in the course of the work, when piston head can not overlap completely with the axis of piston cylinder, piston head can freely rotate with respect to connecting rod, adjust the coaxality of piston head and piston cylinder, meanwhile, owing to being piston head and being connected of connecting rod stable, do not connect, under concrete effect, piston head also can rotate around articulating point with respect to connecting rod, the active force that makes piston rod act on piston head produces the component of radial direction, the point of action of this component is positioned at the seal lip of piston head, cause seal lip in the situation that the sidewall of clamping piston cylinder moves, produce the frictional force of piston cylinder to seal lip, and because the centre of sphere of the bulb of cup-and-ball joint is positioned at the front end of the seal lip of piston head, under the effect of piston head in external force when the centre of sphere rotates, between the seal lip of a side contrary to sense of rotation and the sidewall of piston cylinder, produce pressure, and then generation frictional force, make connecting rod to the frictional force of seal lip, form a pair of couple to the active force of articulating point and piston cylinder, the action direction of this couple is contrary with the sense of rotation of piston head, thereby can reduce the moving direction of piston head and the angle between connecting rod, the component that the active force that causes piston rod to act on piston head produces radial direction further reduces, finally make piston head restore original position.Thereby greatly reduce the wearing and tearing of piston head, extended its working life.
The beneficial effect of concrete piston provided by the present invention is identical with the beneficial effect of above-mentioned concrete pump, repeats no more here.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of typical concrete piston in prior art;
The structural representation of the concrete piston that Fig. 2 provides for patent CN200920312334.7;
Fig. 3 produces the stressed schematic diagram after angle for the concrete piston that patent CN200920312334.7 provides under unstable state;
The structural representation of the concrete piston that Fig. 4 provides for the first embodiment of the present invention;
Fig. 5 is that concrete piston of the present invention produces the stressed schematic diagram after angle under unstable state;
The structural representation of the concrete piston that Fig. 6 provides for the second embodiment of the present invention;
The structural representation of the concrete piston that Fig. 7 provides for the third embodiment of the present invention;
The structural representation of the concrete piston that Fig. 8 provides for the 4th kind of embodiment of the present invention;
The structural representation of the concrete piston that Fig. 9 provides for the 5th kind of embodiment of the present invention;
The structural representation of the concrete pumping equipment that Figure 10 provides for a kind of embodiment of the present invention.
Embodiment
Core of the present invention is to provide a kind of concrete piston, while there is drift angle in this concrete piston under the effect that is subject to external force, can return back to original state at the angle that the unstable state of modifying factor piston head moving direction produces automatically, thereby return to the state that piston head and piston cylinder have good coaxality, and then reduced the wearing and tearing of the seal lip of piston head, extended working life.Another core of the present invention is to provide a kind of concrete pumping equipment that comprises above-mentioned concrete piston.
In order to make those skilled in the art person understand better the present invention program, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 4, the structural representation of the concrete piston that Fig. 4 provides for the first embodiment of the present invention.
As shown in FIG., in a kind of embodiment, concrete piston provided by the present invention, comprises connecting rod 53 and piston head 51, and connecting rod 53 and piston head 51 are hinged by cup-and-ball joint, and the centre of sphere of cup-and-ball joint is positioned at the front end of the seal lip of piston head 51.
Particularly, piston head 51 comprises connecting plate 515, guide ring 511, piston body 512, concrete seal 514 and pressing plate 513, wherein guide ring 511, piston body 512 and concrete seal 514 are arranged between connecting plate 515 and pressing plate 513, connecting plate 515 is connected by bolt 57 with pressing plate 513, and guide ring 511, piston body 512 and concrete seal 514 are clamped; Connecting rod 53 and piston head 51 are hinged by cup-and-ball joint, refer to that piston head 51 can produce drift angle with respect to connecting rod, thereby can meet the requirement of the coaxality of automatic adjustment piston head 51 and piston cylinder; The other end of connecting rod 53 can be connected with piston rod 56 by cassette joint 55.
Please refer to Fig. 5, Fig. 5 is that concrete piston of the present invention produces the stressed schematic diagram after angle under unstable state.
Like this, connecting rod 53 is connected by cup-and-ball joint with piston head 51, in the course of the work, when piston head 51 can not overlap completely with the axis of piston cylinder, piston head 51 can freely rotate with respect to connecting rod 53, adjust the coaxality of piston head 51 and piston cylinder, yet meanwhile, owing to being piston head 51 and being connected of connecting rod 53 stable, do not connect, under the effect of concrete resistance, piston head 51 also can rotate around articulating point with respect to connecting rod 53, because the bulb semi circular surface of the cup-and-ball joint of the center line perpendicular to piston head 51 is positioned at the front end of seal lip of the concrete seal 514 of piston head 51, thereby piston head 51 is when connecting rod rotates around ball and socket point under to the effect of the directed force F 1 ' of articulating point, between the seal lip of a side contrary to sense of rotation and the sidewall of piston cylinder, produce pressure N ', be subject to the frictional force F2 ' of piston cylinder simultaneously.Now, directed force F 1 ' and the piston cylinder of 53 pairs of articulating points of connecting rod form a pair of couple to the frictional force F2 ' of seal lip, the action direction of this couple makes the angle theta of piston head 51 and connecting rod 53 ' reduce, until restPose, thereby return to the state that piston head 51 and piston cylinder have good coaxality, thereby improved the stress of piston head 51, reduced the wearing and tearing of piston head 51, extended its working life.
Can find out, concrete piston provided by the present invention, not only can automatically adjust, meet the coaxality requirement of piston head 51 and piston cylinder, and while producing drift angle under the effect that is subject to concrete active force, only need less active force just can make piston head 51 set back, and the stress at each position of piston head 51 also improve, thereby greatly reduce the wearing and tearing of piston head 51, extended its working life.
Please refer to Fig. 6, the structural representation of the concrete piston that Fig. 6 provides for the second embodiment of the present invention.
As shown in FIG., in a kind of embodiment, the front end of the connecting rod 53 of concrete piston provided by the present invention is provided with bulb 532, the gland 513 of piston head offers the first half ball-and-sockets that match with the first hemispherical head 5321 of bulb 532, the bulb pressing plate 52 that is arranged at connecting rod 53 1 sides offers the second half ball-and-sockets that match with the second hemispherical head 5322 of bulb 532, gland 513 and bulb pressing plate 52 cooperatively interact, and bulb 532 is limited in the first half ball-and-sockets and the second half ball-and-sockets.
Particularly, above-mentioned the first hemispherical head 5321, the second hemispherical head 5322, the first half ball-and-sockets and the second half ball-and-sockets not represent that it is whole bulb or ball-and-socket half, so long as a part for whole bulb or ball-and-socket all can.
Visible, the structure that above-mentioned bulb and ball-and-socket cooperatively interact can realize the ball pivot between connecting rod 53 and piston head 51 easily, has met the automatic adjustment of piston head 51 with respect to connecting rod 53, simple in structure, easy to connect.
Further, as shown in FIG., the centre of sphere of the first hemispherical head 5321 overlaps with the centre of sphere of the second hemispherical head 5322, and the radius of the first hemispherical head 5321 is less than the radius of the second hemispherical head 5322, between the second hemispherical head 5322 and gland 513, has predetermined gap.Thereby, no matter in installation process, or in working procedure, can limited piston 51 adjustment amount with respect to connecting rod 53, meeting on the basis of adjusting requirement, the activity that prevents piston head 51 is excessive, simultaneously can also be when piston head 51 is subject to concrete active force and deflects, for piston head provides certain reset response power.
Please refer to Fig. 7, the structural representation of the concrete piston that Fig. 7 provides for the third embodiment of the present invention.
As shown in FIG., in a kind of embodiment, the front end of the connecting rod 53 of concrete piston provided by the present invention is provided with the 3 half ball-and-socket 533, the gland 513 of piston head 51 is provided with the 3rd hemispherical head 5131 matching with the madial wall of the 3 half ball-and-socket 533, the bulb pressing plate 52 that is arranged at connecting rod 53 1 sides is provided with the second half ball-and-sockets that match with the outer side wall of the 3 half ball-and-socket 533, gland 513 and bulb pressing plate 52 cooperatively interact, and the 3rd hemispherical head 5131 is limited in the 3 half ball-and-socket 533.
Can find out, by the way, can realize equally piston head 51 and be connected with the ball pivot of connecting rod 53, meet piston head 51 with respect to the self-adjusting requirement of connecting rod 53, reduce the wear extent of piston head 51, extend its working life.
Please refer to Fig. 8, the structural representation of the concrete piston that Fig. 8 provides for the 4th kind of embodiment of the present invention.
As shown in FIG., in a kind of embodiment, the front end of the connecting rod 53 of concrete piston provided by the present invention is provided with the 3 half ball-and-socket 533, the gland 513 of piston head 51 is provided with the first half ball-and-sockets that match with the 3 half ball-and-socket 533, in the 3 half ball-and-socket 533 and the first half ball-and-sockets, be provided with steel ball 58, the bulb pressing plate 52 that is arranged at connecting rod 53 1 sides offers the second half ball-and-sockets that match with the outer side wall of the 3 half ball-and-socket 533, and bulb pressing plate 52 and gland 513 are limited to steel ball 58 in the first half ball-and-sockets and the second half ball-and-sockets.
Similarly, the concrete piston with said structure still can meet piston head 51 with respect to the self-adjusting requirement of connecting rod 53, reduces the wear extent of piston head 51, extends its working life.
Certainly, except above-mentioned various embodiments, other can realize piston head 51 with respect to connecting rod 53 rotations, reduce the wear extent of piston head 51, and the mode that extends its working life is all fine.
Certainly, for limited piston 51 adjustment amount with respect to connecting rod 53, meeting on the basis of adjusting requirement, the activity that prevents piston head 51 is excessive, can be between the cross section of the sidewall of the 3 half ball-and-socket 533 and gland 513 reserved predetermined gap, like this, can also be when piston head 51 be subject to concrete active force and deflects, for piston head provides certain reset response power.
In order to facilitate the connection of bulb pressing plate 52 and gland 513, can on the two, offer the tapped hole of mutual correspondence, and connect by screw 54 or bolt.Certainly, bulb pressing plate 52 also can be connected by other means with gland 513, as long as can require to be all fine by practical function.
Due in the course of the work, piston head 51 needs around articulating point, rotate all the time, thereby each parts of ball pivot are are constantly worn and torn, and in order to reduce above-mentioned wearing and tearing, can on connecting rod 53, offer oil duct 531, oil duct 531 connection fuel filler neck and cup-and-ball joints.
Please refer to Fig. 9, the structural representation of the concrete piston that Fig. 9 provides for the 5th kind of embodiment of the present invention.
Particularly, as shown in Figure 9, above-mentioned fuel filler neck can be positioned at the tail end of connecting rod, also can be positioned at its side, when fuel filler neck is positioned at the side of connecting rod, in refueling process, without cassette joint 55 and the piston rod 56 of dismantling, thereby reduced the complexity while adding lubricant oil.
Please refer to Figure 10, the structural representation of the concrete pumping equipment that Figure 10 provides for a kind of embodiment of the present invention.
As shown in FIG., in a kind of embodiment, the present invention also provides a kind of concrete pumping equipment, comprise piston cylinder 6 and the concrete piston 5 matching with piston cylinder 6, concrete piston 5 is the concrete piston 5 described in above-mentioned any one, the structure of these other each several parts of concrete pumping equipment please refer to prior art, repeats no more herein.
Above concrete pumping equipment provided by the present invention and concrete piston thereof are described in detail.Applied specific case herein principle of the present invention and mode of execution are set forth, above embodiment's explanation is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (10)
1. a concrete piston, comprises connecting rod and piston head, and described connecting rod and described piston head are hinged by cup-and-ball joint, it is characterized in that, the centre of sphere of described cup-and-ball joint is positioned at the front end of the seal lip of described piston head.
2. concrete piston according to claim 1, it is characterized in that, the front end of described connecting rod is provided with bulb, the gland of described piston head offers the first half ball-and-sockets that match with the first hemispherical head of described bulb, the bulb pressing plate that is arranged at described connecting rod one side offers the second half ball-and-sockets that match with the second hemispherical head of described bulb, described gland and described bulb pressing plate cooperatively interact, and described bulb is limited in described the first half ball-and-sockets and the second half ball-and-sockets.
3. concrete piston according to claim 2, it is characterized in that, the centre of sphere of described the first hemispherical head overlaps with the centre of sphere of described the second hemispherical head, and the radius of described the first hemispherical head is less than the radius of described the second hemispherical head, and has predetermined gap between described the second hemispherical head and described gland.
4. concrete piston according to claim 1, it is characterized in that, the front end of described connecting rod is provided with the 3 half ball-and-socket, the gland of described piston head is provided with the 3rd hemispherical head matching with the madial wall of described the 3 half ball-and-socket, the bulb pressing plate that is arranged at described connecting rod one side is provided with the second half ball-and-sockets that match with the outer side wall of described the 3 half ball-and-socket, described gland and described bulb pressing plate cooperatively interact, and described the 3rd hemispherical head is limited in described the 3 half ball-and-socket.
5. concrete piston according to claim 1, it is characterized in that, the front end of described connecting rod is provided with the 3 half ball-and-socket, the gland of described piston head is provided with the first half ball-and-sockets that match with described the 3 half ball-and-socket, in described the 3 half ball-and-socket and described the first half ball-and-sockets, be provided with steel ball, the bulb pressing plate that is arranged at described connecting rod one side offers the second half ball-and-sockets that match with the outer side wall of described the 3 half ball-and-socket, and described bulb pressing plate and described gland are limited to described steel ball in described the first half ball-and-sockets and described the second half ball-and-sockets.
6. according to the concrete piston described in claim 4 or 5, it is characterized in that, between the cross section of the sidewall of described the 3 half ball-and-socket and described gland, there is predetermined gap.
7. according to the concrete piston described in claim 2 to 5 any one, it is characterized in that, described bulb pressing plate and described gland are connected by screw.
8. according to the concrete piston described in claim 1 to 5 any one, it is characterized in that, on described connecting rod, offer oil duct, described oil duct is communicated with fuel filler neck and described cup-and-ball joint.
9. concrete piston according to claim 8, is characterized in that, described fuel filler neck is positioned at tail end or the side of described connecting rod.
10. a concrete pumping equipment, comprises piston cylinder and the concrete piston matching with described piston cylinder, it is characterized in that, described concrete piston is the concrete piston described in claim 1 to 9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110268026.0A CN102410205B (en) | 2011-09-09 | 2011-09-09 | Concrete pumping equipment and concrete piston thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110268026.0A CN102410205B (en) | 2011-09-09 | 2011-09-09 | Concrete pumping equipment and concrete piston thereof |
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| Publication Number | Publication Date |
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| CN102410205A CN102410205A (en) | 2012-04-11 |
| CN102410205B true CN102410205B (en) | 2014-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110268026.0A Active CN102410205B (en) | 2011-09-09 | 2011-09-09 | Concrete pumping equipment and concrete piston thereof |
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| CN (1) | CN102410205B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6001993B2 (en) * | 2012-10-15 | 2016-10-05 | 日立アプライアンス株式会社 | Hermetic reciprocating compressor and refrigerator using the same |
| CN107701866A (en) * | 2017-10-19 | 2018-02-16 | 深圳市深精电科技有限公司 | Can incline zero-clearance pin cup assembly and has its equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6098518A (en) * | 1995-03-10 | 2000-08-08 | Audi Aktiengesellschaft | Piston with piston rod |
| CN201354731Y (en) * | 2008-11-28 | 2009-12-02 | 杭州中冷机电有限公司 | Refrigeration compressor piston with spherical holding part |
| CN201574922U (en) * | 2009-10-13 | 2010-09-08 | 三一重工股份有限公司 | Ball joint type concrete piston and concrete pumping equipment comprising same |
| CN201874804U (en) * | 2010-11-25 | 2011-06-22 | 宝鸡石油机械有限责任公司 | Mud pump piston rod device |
-
2011
- 2011-09-09 CN CN201110268026.0A patent/CN102410205B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6098518A (en) * | 1995-03-10 | 2000-08-08 | Audi Aktiengesellschaft | Piston with piston rod |
| CN201354731Y (en) * | 2008-11-28 | 2009-12-02 | 杭州中冷机电有限公司 | Refrigeration compressor piston with spherical holding part |
| CN201574922U (en) * | 2009-10-13 | 2010-09-08 | 三一重工股份有限公司 | Ball joint type concrete piston and concrete pumping equipment comprising same |
| CN201874804U (en) * | 2010-11-25 | 2011-06-22 | 宝鸡石油机械有限责任公司 | Mud pump piston rod device |
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| CN102410205A (en) | 2012-04-11 |
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