阅读说明：本技术 粘稠物料行程受控的双缸泵送装置 (Double-cylinder pumping device with stroke controlled for viscous material ) 是由 彭娜 于 2020-06-23 设计创作，主要内容包括：本发明涉及泵送装置技术领域,具体是粘稠物料行程受控的双缸泵送装置,包括两个输送缸和两个液压油缸,所述输送缸的前端设有进料口和排料口,两个所述排料口的前端设有输出管道；本发明将活塞上的密封件设置成四个,分别两两一组,并在输送缸上设置对活塞中两个密封件之间供油的注油器,可以保证活塞在运动过程中始终保持着良好的润滑,降低密封件的磨损量,提高使用寿命,并且利用两个密封件之间的压力变化控制两组密封件的切换,当其中一组密封圈发生磨损泄露后,切换另一组使用,不仅可以及时的提醒使用者更换密封圈,且利用这种替换可以保证输送缸缸体的完整,同时保证施工工程的正常进行,防止工程中断或减少停滞时间。(The invention relates to the technical field of pumping devices, in particular to a double-cylinder pumping device with a stroke-controlled viscous material, which comprises two conveying cylinders and two hydraulic cylinders, wherein the front ends of the conveying cylinders are provided with a feed inlet and a discharge outlet, and the front ends of the two discharge outlets are provided with output pipelines; the four sealing elements on the piston are respectively arranged into one group in pairs, and the oil ejector for supplying oil between the two sealing elements in the piston is arranged on the conveying cylinder, so that the piston can be ensured to be always kept in good lubrication in the movement process, the abrasion loss of the sealing elements is reduced, the service life is prolonged, the switching of the two groups of sealing elements is controlled by utilizing the pressure change between the two sealing elements, when one group of sealing elements is abraded and leaked, the other group of sealing elements is switched for use, a user can be timely reminded to replace the sealing elements, the integrity of the cylinder body of the conveying cylinder can be ensured by utilizing the replacement, the normal operation of construction engineering is ensured, and the engineering interruption is prevented or the dead time is reduced.)

1. Double-cylinder pumping installations that viscous material stroke is controlled, its characterized in that: the automatic material conveying device comprises two conveying cylinders (1) and two hydraulic oil cylinders (2), wherein the front ends of the conveying cylinders (1) are provided with a feeding hole (11) and a discharging hole (12), the front ends of the discharging holes (12) are provided with an output pipeline (13), the two hydraulic oil cylinders (2) are respectively installed at the tail ends of the two conveying cylinders (1), the output ends of the hydraulic oil cylinders (2) are provided with valve rods (24) extending into the conveying cylinders (1), pistons (3) are arranged on the valve rods (24), sealing rings (34) are arranged on the outer walls of the pistons (3), each sealing ring (34) comprises a first sealing ring (341), a second sealing ring (342), a third sealing ring (343) and a fourth sealing ring (344), wherein the first sealing ring (341), the third sealing ring (343) are in contact with the inner walls of the conveying cylinders (1) or the second sealing ring (342), The fourth sealing ring (344) is in contact with the inner wall of the conveying cylinder (1), and an oil ejector (5) for injecting oil to the piston (3) is further arranged on the conveying cylinder (1);

two pushing block movable cavities (301) are arranged in the piston (3), the two pushing block movable cavities (301) are separated by a partition plate (31), a sealing ring pushing block (32) used for controlling the action states of a first sealing ring (341), a second sealing ring (342) or a third sealing ring (343) and a fourth sealing ring (344) is arranged in each pushing block movable cavity (301), and the two sealing ring pushing blocks (32) are fixedly connected through a connecting column (33) penetrating through the partition plate (31);

two oil storage cavities (305) are formed between the sealing ring pushing block (32) and the partition plate (31), a first oil injection channel (303) and a second oil injection channel (304) which are respectively communicated with the two oil storage cavities (305) are arranged on the piston (3), the oil injector (5) is connected with two oil delivery pipes (51) through a reversing valve (52), and the two oil delivery pipes (51) are respectively connected with the first oil injection channel (303) and the second oil injection channel (304);

the sealing ring pushing block (32) comprises two circular truncated cones with opposite small ends, the side wall surfaces of the circular truncated cones are in sliding connection with the sealing rings (34), the inner walls of the sealing rings (34) are arranged into inclined surfaces matched with the sealing ring pushing block (32), guide grooves (307) matched with the sealing rings (34) are further formed in the piston (3), and the guide grooves (307) are distributed along the radial direction of the piston (3);

a cooling layer (101) is arranged in the conveying cylinder (1), an observation pipe (4) communicated with the cooling layer (101) is arranged outside the conveying cylinder (1), the observation pipe (4) is a transparent pipe, one side, away from the discharge opening (12), of the piston (3) is filled with water, and a limiting block (102) used for limiting the piston (3) is arranged on the inner wall of the conveying cylinder (1);

two ends of the hydraulic oil cylinders (2) are respectively provided with a lower stroke valve port (21) and an upper stroke valve port (22), and one ends of the two hydraulic oil cylinders (2) close to the upper stroke valve port (22) are provided with communicating valves (23) which enable the two hydraulic oil cylinders (2) to be communicated.

2. The dual cylinder viscous material stroke controlled pumping apparatus of claim 1, wherein: and a connecting hole (241) is formed in the valve rod (24), and the oil delivery pipe (51) penetrates through the connecting hole (241) and enters the piston (3).

Technical Field

The invention relates to the technical field of pumping devices, in particular to a double-cylinder pumping device with a stroke controlled by a viscous material.

Background

The double-cylinder pumping mainly conveys viscous materials such as concrete or coal slime, and the like, in construction machinery, a concrete conveying cylinder is an important part of concrete conveying equipment for realizing the concrete conveying function, is easy to wear due to strong friction with concrete mortar during working, is a quick-wear part of the concrete conveying equipment, and directly influences the stability and the efficiency of pump truck construction, and the conveying cylinder used by the concrete conveying equipment mainly has two functions, namely sealing, and a sealing cavity is formed by the conveying cylinder and a piston to ensure that concrete can be normally pumped; secondly, concrete is conveyed, the concrete needs to enter a concrete conveying pipeline through a conveying cylinder and then is conveyed to a designated place, when a piston sealing element in the conveying cylinder is well sealed, abrasion of mortar is mainly buffered by the sealing element, if the sealing element cannot be replaced in time after being abraded, hard connection between the mortar and a cylinder wall and between the mortar and the piston is easily caused, the cylinder wall is scratched, the whole conveying cylinder needs to be replaced in serious cases, and how to timely judge whether the sealing element is abraded excessively and replaced is a problem to be solved urgently.

Disclosure of Invention

The invention aims to provide a double-cylinder pumping device with a stroke controlled for viscous materials, so as to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: the double-cylinder pumping device with the stroke of viscous materials controlled comprises two conveying cylinders and two hydraulic oil cylinders, wherein the front ends of the conveying cylinders are provided with a feed inlet and a discharge outlet, the front ends of the two discharge outlets are provided with output pipelines, the two hydraulic oil cylinders are respectively arranged at the tail ends of the two conveying cylinders, the output ends of the hydraulic oil cylinders are provided with valve rods extending into the conveying cylinders, pistons are arranged on the valve rods, sealing rings are arranged on the outer walls of the pistons and comprise first sealing rings, second sealing rings, third sealing rings and fourth sealing rings, the first sealing rings and the third sealing rings are in contact with the inner walls of the conveying cylinders or the second sealing rings and the fourth sealing rings are in contact with the inner walls of the conveying cylinders, oil injectors for injecting oil to the pistons are further arranged on the conveying cylinders, and the two hydraulic oil cylinders are connected with a hydraulic pump station, the material feeding device comprises a conveying cylinder, a feeding hole at the front end of the conveying cylinder is connected with a material feeding device, a discharging hole is connected with a conveying pipe, independently controlled valves are arranged at the feeding hole and the discharging hole, in the material conveying process, one conveying cylinder is pushed by a hydraulic pump station to convey forwards, the other conveying cylinder is pulled backwards by the hydraulic pump station, in the conveying process of the conveying cylinder, the valve at the discharging hole is opened, so that materials in the conveying cylinder are pushed out by a piston, in the feeding process of the conveying cylinder, the valve at the discharging hole is closed, the materials enter the conveying cylinder from the feeding hole, in the reciprocating sliding process of the piston in the conveying cylinder, sealing rings (a first sealing ring and a third sealing ring) on the piston are in contact with the inner wall of the conveying cylinder, and the sealing rings (a second sealing ring and a fourth sealing ring) are not in contact with the inner wall of the conveying cylinder, so that the second sealing ring, The fourth sealing ring is used as a standby sealing ring, and is replaced and used after the first sealing ring and the third sealing ring are abraded, so that the first sealing ring and the third sealing ring can be replaced untimely after abrasion occurs in one construction process, and can be replaced after construction is completed, so that the continuity of engineering can be ensured under the condition that the conveying cylinder is not abraded, the whole project can be failed if concrete of one project is not poured once, the conveying cylinder can be seriously abraded if construction is continued under the condition that the sealing rings are abraded, the problem can be well solved by using the standby sealing ring, in addition, the sealing rings can be ensured to be kept in a good lubricating state and sealing property by injecting oil between the sealing rings on the piston through the oil injector, so that the abrasion of the sealing rings in the motion process can be reduced, and the heat productivity can be reduced, therefore, the deformation can be effectively reduced and the service life can be prolonged.

Preferably, the inside of piston is equipped with two and promotes a movable chamber, two promote to separate through the baffle between the movable chamber of piece, it is used for control to promote to be equipped with in the movable chamber of piece first sealing ring, second sealing ring or third sealing ring, fourth sealing ring effect state's sealing ring promotes the piece, two the sealing ring promotes between the piece through running through the spliced pole fixed connection of baffle.

Preferably, the sealing ring promotes the piece with form two oil storage chambeies between the baffle, be equipped with on the piston respectively with two first oiling passageway and the second oiling passageway that oil storage chamber communicates, the grease squirt is connected with two defeated oil pipes through the switching-over valve, two defeated oil pipe respectively with first oiling passageway and second oiling passageway are connected.

Preferably, when the oil storage cavity is filled with oil, the other end of the pushing block of the sealing ring is attached to the inner wall of the movable cavity of the pushing block, an oil drain port on the oil storage cavity leaks out, and the oil drain port is communicated with a lubricating cavity formed between the two sealing rings; the sealing ring pushing block is a structure that the small-diameter ends of two circular truncated cones are butted together, two pushing block movable cavities are arranged together, one sealing ring pushing block is arranged in each pushing block movable cavity, the two sealing ring pushing blocks are fixedly connected through a connecting column, the sliding direction of the two sealing ring pushing blocks is the axial direction of a piston, when the sealing ring pushing blocks move in the axial direction, as the side wall surface of each sealing ring pushing block is an inclined surface, the inner side surfaces of the first sealing ring, the second sealing ring or the third sealing ring and the fourth sealing ring are adaptively designed into inclined surfaces, when lubricating oil enters from the second oil injection channel during relative sliding, the sealing ring pushing blocks below are continuously extruded, the two sealing ring pushing blocks move downwards, the sealing ring pushing block above pushes the first sealing ring to elastically extend outwards to contact the inner wall surface of the conveying cylinder, the second sealing ring elastically contracts and is separated from the contact with the inner wall surface of the conveying cylinder, the lower sealing ring pushing block pushes the third sealing ring to elastically extend outwards and contact the inner wall surface of the conveying cylinder, the fourth sealing ring elastically contracts and is separated from the contact with the inner wall surface of the conveying cylinder, so that the first sealing ring and the third sealing ring are active sealing rings, the second sealing ring and the fourth sealing ring are standby sealing rings, a lubricating cavity is formed between the first sealing ring and the third sealing ring, lubricating oil flows along an oil discharge port, when one of the first sealing ring and the third sealing ring is damaged, the lubricating oil in the lubricating cavity can be leaked out, the oil pressure is changed, an oil supply pipeline is switched by utilizing the change, the lubricating oil flows into the oil storage cavity from the first oil filling channel, the lubricating oil extrudes the upper sealing ring pushing block, and the second sealing ring and the fourth sealing ring elastically extend outwards, when the first sealing ring and the third sealing ring contact with the inner wall surface of the conveying cylinder, the first sealing ring and the third sealing ring are contracted and do not contact with the inner wall surface of the conveying cylinder any more, replacement of a standby sealing ring is achieved, abrasion of the cylinder wall of the conveying cylinder caused by damage of the sealing ring can be reduced, and the conveying process can be continued.

Preferably, the sealing ring pushing block comprises two circular truncated cones with opposite small ends, the side wall surfaces of the circular truncated cones are in sliding connection with the sealing ring, the inner wall of the sealing ring is arranged to be an inclined surface matched with the sealing ring pushing block, the piston is further provided with a guide groove matched with the sealing ring, and the guide groove is distributed along the radial direction of the piston.

Preferably, a plurality of arc steel sheets which are uniformly distributed are embedded in the inner side of the sealing ring.

Preferably, a first elastic joint and a second elastic joint which are connected with an input pipeline are arranged in the reversing valve, a guide rod is connected between the first elastic joint and the second elastic joint, and the two oil conveying pipes are respectively connected with the output ends of the first elastic joint and the second elastic joint.

Preferably, be equipped with the cooling layer in the transport cylinder, the outside of transport cylinder be equipped with the observation pipe of cooling layer intercommunication, the observation pipe is transparent pipe, the piston is kept away from one side packing of bin outlet has water, the inner wall of transport cylinder is equipped with and is used for right the spacing stopper of piston, if the piston takes place to reveal, then the concrete slurry can enter into the opposite side of piston, promptly, flows into the observation pipe from the aquatic in, the staff of just so being convenient for passes through the change of quality of water, judges whether to have taken place to reveal, and the observation pipe still plays the effect to the piston cooling simultaneously, and the cooling layer can be cooled down to the wall of transport cylinder, guarantees that the sealing washer on the piston is in good operational environment, increase of service life.

Preferably, two ends of the hydraulic oil cylinders are respectively provided with a lower stroke valve port and an upper stroke valve port, and one ends of the two hydraulic oil cylinders, which are close to the upper stroke valve ports, are provided with communication valves for communicating the two hydraulic oil cylinders.

Preferably, the valve rod is provided with a connecting hole, and the oil delivery pipe penetrates through the connecting hole and enters the piston.

Compared with the prior art, the invention has the beneficial effects that:

the four sealing elements on the piston are respectively arranged into one group in pairs, and the oil ejector for supplying oil between the two sealing elements in the piston is arranged on the conveying cylinder, so that the piston can be ensured to be always kept in good lubrication in the movement process, the abrasion loss of the sealing elements is reduced, the service life is prolonged, the switching of the two groups of sealing elements is controlled by utilizing the pressure change between the two sealing elements, when one group of sealing elements is abraded and leaked, the other group of sealing elements is switched for use, a user can be timely reminded to replace the sealing elements, the integrity of the cylinder body of the conveying cylinder can be ensured by utilizing the replacement, the normal operation of construction engineering is ensured, and the engineering interruption is prevented or the dead time is reduced.

Drawings

FIG. 1 is a schematic structural view of a dual cylinder pumping apparatus with controlled viscous material stroke according to the present invention;

FIG. 2 is a schematic structural view of a transfer cylinder in an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a first sealing ring and a third sealing ring on a piston acting on the inner wall of a conveying cylinder in the embodiment of the invention;

FIG. 4 is a schematic structural diagram of a second sealing ring and a fourth sealing ring on a piston acting on the inner wall of a conveying cylinder in the embodiment of the invention;

FIG. 5 is a schematic structural view of a diverter valve in an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a seal ring according to an embodiment of the present invention.

Reference numbers in the figures: 1. a delivery cylinder; 101. a cooling layer; 102. a limiting block; 11. a feed inlet; 12. a discharge outlet; 13. an output pipe; 2. a hydraulic cylinder; 21. a lower stroke valve port; 22. an upper travel valve port; 23. a communication valve; 24. a valve stem; 241. connecting holes; 3. a piston; 301. a push block movable cavity; 302. an oil discharge port; 303. a first oiling channel; 304. a second oiling channel; 305. an oil storage chamber; 306. a lubrication chamber; 307. a guide groove; 31. a partition plate; 32. a sealing ring pushing block; 33. connecting columns; 34. a seal ring; 341. a first seal ring; 342. a second seal ring; 343. a third seal ring; 344. a fourth seal ring; 35. a steel sheet; 4. an observation tube; 5. an oil lubricator; 51. an oil delivery pipe; 52. a diverter valve; 53. a first elastic joint; 54. a second elastic joint; 55. a guide rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): as shown in fig. 1 to 6, the double-cylinder pumping device with a stroke-controlled viscous material comprises two conveying cylinders 1 and two hydraulic oil cylinders 2, wherein the front ends of the conveying cylinders 1 are provided with a feed inlet 11 and a discharge outlet 12, the front ends of the two discharge outlets 12 are provided with output pipelines 13, the two hydraulic oil cylinders 2 are respectively installed at the tail ends of the two conveying cylinders 1, the output ends of the hydraulic oil cylinders 2 are provided with valve rods 24 extending into the conveying cylinders 1, the valve rods 24 are provided with pistons 3, the outer walls of the pistons 3 are provided with sealing rings 34, each sealing ring 34 comprises a first sealing ring 341, a second sealing ring 342, a third sealing ring 343 and a fourth sealing ring 344, wherein the first sealing ring 341 and the third sealing ring 343 are in contact with the inner walls of the conveying cylinders 1 or the second sealing ring 342 and the fourth sealing ring 344 are in contact with the inner walls of the conveying cylinders 1, and the; the two hydraulic oil cylinders 2 are connected with a hydraulic pump station, power is provided for the hydraulic oil cylinders 2, a feed port 11 at the front end of a conveying cylinder 1 is connected with a material feeding device, a discharge port 12 is connected with a conveying pipe, valves which are controlled independently are arranged at the feed port 11 and the discharge port 12, in the material conveying process, one conveying cylinder 1 is pushed forward by the hydraulic pump station, the other conveying cylinder 1 is pulled backward by the hydraulic pump station, in the conveying process of the conveying cylinder 1, the valve at the discharge port 12 is opened, so that the material in the conveying cylinder 1 is pushed out by a piston 3, when the conveying cylinder 1 feeds, the valve at the discharge port 12 is closed, the material enters the conveying cylinder 1 from the feed port 11, in the reciprocating sliding process of the piston 3 in the conveying cylinder 1, sealing rings 34 (a first sealing ring 341 and a third sealing ring 343) on the piston 3 are in contact with the inner wall of the conveying cylinder 1, the sealing rings 34 (the second sealing ring 342 and the fourth sealing ring 344) are not contacted with the inner wall of the conveying cylinder 1, so that the second sealing ring 342 and the fourth sealing ring 344 are used as spare sealing rings 34, when the first sealing ring 341 and the third sealing ring 343 are worn, the first sealing ring 341 and the third sealing ring 343 are replaced, so that the second sealing ring 342 and the fourth sealing ring 344 can be replaced in one construction process, if the first sealing ring 341 and the third sealing ring 343 are worn, the first sealing ring can be replaced untimely, and the third sealing ring can be replaced after the construction is finished, so that the construction can be continued without wearing the conveying cylinder 1, the continuous construction of the whole project can be ensured, if the concrete of one project is not poured once, the failure of the whole project can be caused, if the construction is continued under the condition that the sealing rings 34 are worn, the wearing of the conveying cylinder 1 can be serious, so that the problem can be well solved by using, the sealing ring 34 can be ensured to keep good lubrication state and sealing performance, so that the abrasion of the sealing ring 34 in the motion process can be reduced, the heat productivity is reduced, the deformation can be effectively reduced, and the service life can be prolonged.

Specifically, as shown in fig. 3, two movable pushing block cavities 301 are arranged inside the piston 3, the two movable pushing block cavities 301 are separated by a partition plate 31, a sealing ring pushing block 32 for controlling the action states of a first sealing ring 341, a second sealing ring 342, a third sealing ring 343 and a fourth sealing ring 344 is arranged in each movable pushing block cavity 301, the two sealing ring pushing blocks 32 are fixedly connected by a connecting column 33 penetrating through the partition plate 31, it can be seen that the sealing ring pushing block 32 is a structure in which the small-diameter ends of two circular truncated cones are butted together, two movable pushing block cavities 301 are arranged in total, one sealing ring pushing block 32 is arranged in each movable pushing block cavity 301, the two sealing ring pushing blocks 32 are fixedly connected by one connecting column 33, the sliding direction of the two sealing ring pushing blocks 32 is the axial direction of the piston 3, when the sealing ring pushing blocks 32 move in the axial direction, because the side wall surface of the sealing ring pushing block 32 is an inclined surface, the inner side surfaces of the first sealing ring 341, the second sealing ring 342 or the third sealing ring 343 and the fourth sealing ring 344 are adaptively designed to be inclined surfaces, when lubricating oil enters from the second oil filling channel 304, the inner side surfaces of the first sealing ring 341, the second sealing ring 342 or the third sealing ring 343 and the fourth sealing ring 344 are designed to be inclined surfaces, as shown in fig. 3, the lower sealing ring pushing block 32 is continuously pressed, the two sealing ring pushing blocks 32 move downwards, the upper sealing ring pushing block 32 pushes the first sealing ring 341 to elastically extend outwards to contact the inner wall surface of the conveying cylinder 1, the second sealing ring 342 elastically contracts to be separated from the contact with the inner wall surface of the conveying cylinder 1, the lower sealing ring pushing block 32 pushes the third sealing ring 343 to elastically extend outwards to contact the inner wall surface of the conveying cylinder 1, the fourth sealing ring 344 elastically contracts to be separated from the contact with, the second seal ring 342 and the fourth seal ring 344 are spare seal rings, a lubrication cavity 306 is formed between the first seal ring 341 and the third seal ring 343, the lubricating oil flows along the oil drain port 302, when one seal ring 34 of the first seal ring 341 and the third seal ring 343 is damaged, the lubricating oil in the lubrication cavity 306 is leaked out, so that the oil pressure is changed, and by using the change, the oil supply pipeline is switched, so that the lubricating oil flows into the oil storage cavity 305 from the first oil filling channel 303, as shown in fig. 4, the lubricating oil presses the upper seal ring push block 32, so that the second seal ring 342 and the fourth seal ring 344 elastically extend outwards and contact the inner wall surface of the conveying cylinder 1, the first seal ring 341 and the third seal ring 343 contract and are not contacted with the inner wall surface of the conveying cylinder 1 any more, the replacement of the spare seal ring 34 is realized, thereby the abrasion of the cylinder wall of the conveying cylinder 1 caused by the damage of the seal ring 34 can be, it is also ensured that the transport process can continue.

Specifically, two oil storage cavities 305 are formed between the sealing ring pushing block 32 and the partition plate 31, a first oil injection channel 303 and a second oil injection channel 304 which are respectively communicated with the two oil storage cavities 305 are arranged on the piston 3, the oil injector 5 is connected with two oil delivery pipes 51 through a reversing valve 52, the two oil delivery pipes 51 are respectively connected with the first oil injection channel 303 and the second oil injection channel 304, as shown in fig. 3, the sealing ring pushing block 32 is hermetically connected with the pushing block movable cavity 301, a sealing ring can be arranged on the end face of the sealing ring pushing block 32 to ensure that oil cannot leak from the oil storage cavity 305, the oil injector 5 injects oil into the oil storage cavity 305 through the second oil injection channel 304, when the oil in the oil storage cavity 305 increases to a certain amount, the sealing ring pushing block 32 is pushed to a limit position, at the moment, the oil discharge port 302 leaks out, the lubricating oil is filled in the lubricating cavity 306 and gradually stabilizes under a certain pressure, the reversing valve 52, if leakage occurs, the pressure changes, and the lubricator 5 is switched to the first lubricator passage 303 through the selector valve 52, as shown in fig. 4, to perform the lubrications and the replacement of the primary and backup seal rings 34.

Specifically, when being full of fluid in the oil storage chamber 305, the sealing ring promotes the other end of piece 32 and promotes the laminating of piece activity chamber 301 inner wall, oil drain port 302 on the oil storage chamber 305 leaks, lubrication chamber 306 that forms between oil drain port 302 and two sealing rings 34 switches on, just so can make only the sealing ring promote piece 32 slide when the limit state, oil drain port 302 just can be opened, fluid just can enter into lubrication chamber 306, can prevent the fluid backward flow in lubrication chamber 306 like this, oil drain port 302 in two oil storage chambers 305 only has one simultaneously and can be opened.

Specifically, the sealing ring pushing block 32 includes two circular truncated cones with opposite small ends, the side wall surfaces of the circular truncated cones are slidably connected with the sealing ring 34, the inner wall of the sealing ring 34 is provided with an inclined surface matched with the sealing ring pushing block 32, the piston 3 is further provided with a guide groove 307 matched with the sealing ring 34, the guide groove 307 is radially distributed along the piston 3, axial movement can be enabled to convert the sealing ring 34 into elastic deformation in the radial direction through the inclined surface, and the sealing ring 34 can be more stably extended in the radial direction by using the guide groove 307.

Specifically, as shown in fig. 6, a plurality of arc-shaped steel sheets 35 which are uniformly distributed are embedded in the inner side of the sealing ring 34, the sealing ring 34 is an elastic sealing ring in the prior art as a whole, but in order to ensure that the transmission is more accurate by utilizing the inclined plane to relatively slide, the rigidity of the inner side can be increased by utilizing the arc-shaped steel sheets 35 which are close to the inner side of the sealing ring 34, therefore, the deformation stability of the sealing ring 34 can be increased in the transmission process, and the outer layer can be uniformly contacted with the inner wall surface of the conveying cylinder 1.

Specifically, as shown in fig. 5, a first elastic joint 53 and a second elastic joint 54 connected to an input pipeline are arranged in the reversing valve 52, a guide rod 55 is connected between the first elastic joint 53 and the second elastic joint 54, the two oil delivery pipes 51 are respectively connected to output ends of the first elastic joint 53 and the second elastic joint 54, the guide rod 55 is made of hard material, a part of the guide rod is leaked outside the reversing valve 52 and is convenient for a user to manually control, the first elastic joint 53 and the second elastic joint 54 are deformable elastic components, when the oil pressure in the oil delivery pipes 51 has certain pressure, the first elastic joint 53 or the second elastic joint 54 can be expanded, and the other one can be squeezed to be closed, when the guide rod 55 is manually shifted to enable one to be squeezed to be blocked at the beginning, the other one can be automatically squeezed after the pressure is stabilized, when the pressure in the pipeline is reduced, the squeezed elastic joint is opened, the lubricating oil enters the other oil delivery pipe 51, and after the lubricating oil reaches a stable pressure, the former elastic joint is extruded and closed, so that the automatic switching of oil supply pipelines is realized.

Specifically, be equipped with cooling layer 101 in carrying jar 1, the outside of carrying jar 1 is equipped with the observation tube 4 with cooling layer 101 intercommunication, observation tube 4 is transparent pipe, the one side packing that the bin outlet 12 was kept away from to piston 3 has water, the inner wall of carrying jar 1 is equipped with and is used for the stopper 102 spacing to piston 3, if piston 3 takes place to reveal, then the concrete thick liquid can enter into piston 3's opposite side, namely, flow into observation tube 4 from the aquatic, the staff of just so being convenient for passes through the change of quality of water, judge whether to have taken place to reveal, observation tube 4 still plays the effect of cooling to piston 3 simultaneously, cooling layer 101 can cool down the wall of carrying jar 1, guarantee that sealing washer 34 on the piston 3 is in good operational environment, and service life is prolonged.

Specifically, the two ends of the hydraulic oil cylinder 2 are respectively provided with a lower stroke valve port 21 and an upper stroke valve port 22, one ends of the two hydraulic oil cylinders 2, which are close to the upper stroke valve port 22, are provided with communicating valves 23 which enable the two hydraulic oil cylinders 2 to be communicated, in order to ensure that the valve rods 24 in the two hydraulic oil cylinders 2 are downward synchronously upwards one by one, different phenomena cannot be generated, the communicating valves 23 of the two hydraulic oil cylinders 2 are enabled to connect the two hydraulic oil cylinders 2 together, the upper stroke valve port 22 is closed, the formation of the two hydraulic oil cylinders 2 is controlled only through the lower stroke valve port 21, a better control effect is achieved, and higher conveying continuity is.

Specifically, the valve rod 24 is provided with a connecting hole 241, and the oil delivery pipe 51 penetrates through the connecting hole 241 and enters the piston 3, mainly to facilitate the delivery of the lubricating oil to the piston 3.

The working principle is as follows: the two hydraulic oil cylinders 2 are connected with a hydraulic pump station, power is provided for the hydraulic oil cylinders 2, a feed port 11 at the front end of a conveying cylinder 1 is connected with a material feeding device, a discharge port 12 is connected with a conveying pipe, valves which are controlled independently are arranged at the feed port 11 and the discharge port 12, in the material conveying process, one conveying cylinder 1 is pushed forward by the hydraulic pump station, the other conveying cylinder 1 is pulled backward by the hydraulic pump station, in the conveying process of the conveying cylinder 1, the valve at the discharge port 12 is opened, so that the material in the conveying cylinder 1 is pushed out by a piston 3, when the conveying cylinder 1 feeds, the valve at the discharge port 12 is closed, the material enters the conveying cylinder 1 from the feed port 11, in the reciprocating sliding process of the piston 3 in the conveying cylinder 1, sealing rings 34 (a first sealing ring 341 and a third sealing ring 343) on the piston 3 are in contact with the inner wall of the conveying cylinder 1, the sealing rings 34 (the second sealing ring 342 and the fourth sealing ring 344) are not contacted with the inner wall of the conveying cylinder 1, so that the second sealing ring 342 and the fourth sealing ring 344 are used as spare sealing rings 34, when the first sealing ring 341 and the third sealing ring 343 are worn, the first sealing ring 341 and the third sealing ring 343 are replaced, so that the second sealing ring 342 and the fourth sealing ring 344 can be replaced in one construction process, if the first sealing ring 341 and the third sealing ring 343 are worn, the first sealing ring can be replaced untimely, and the third sealing ring can be replaced after the construction is finished, so that the construction can be continued without wearing the conveying cylinder 1, the continuous construction of the whole project can be ensured, if the concrete of one project is not poured once, the failure of the whole project can be caused, if the construction is continued under the condition that the sealing rings 34 are worn, the wearing of the conveying cylinder 1 can be serious, so that the problem can be well solved by using, the sealing ring 34 can be ensured to keep good lubrication state and sealing performance, so that the abrasion of the sealing ring 34 in the motion process can be reduced, the heat productivity can be reduced, the deformation can be effectively reduced, and the service life can be effectively prolonged, and it can be seen that the sealing ring pushing block 32 is a structure in which the small-diameter ends of two circular truncated cones are butted together, two pushing block movable cavities 301 are arranged together, one sealing ring pushing block 32 is arranged in each pushing block movable cavity 301, the two sealing ring pushing blocks 32 are fixedly connected through a connecting column 33, the sliding direction of the two sealing ring pushing blocks 32 is the axial direction of the piston 3, when the sealing ring pushing block 32 moves in the axial direction, because the side wall surface of the sealing ring pushing block 32 is an inclined surface, the inner side surfaces of the first sealing ring 341, the second sealing ring 342 or the third sealing ring 343 and the fourth sealing ring 344 are adaptively designed to, when the lubricating oil enters from the second oil filling channel 304, the lower sealing ring pushing blocks 32 are continuously pressed, as shown in fig. 3, the two sealing ring pushing blocks 32 move downwards, the upper sealing ring pushing block 32 pushes the first sealing ring 341 to elastically extend outwards and contact the inner wall surface of the conveying cylinder 1, the second sealing ring 342 elastically contracts and is separated from the contact with the inner wall surface of the conveying cylinder 1, the lower sealing ring pushing block 32 pushes the third sealing ring 343 to elastically extend outwards and contact the inner wall surface of the conveying cylinder 1, the fourth sealing ring 344 elastically contracts and is separated from the contact with the inner wall surface of the conveying cylinder 1, so that the first sealing ring 341 and the third sealing ring 343 are active sealing rings 34, the second sealing ring 342 and the fourth sealing ring 344 are standby sealing rings, a lubricating cavity 306 is formed between the first sealing ring 341 and the third sealing ring 343, the lubricating oil flows along the oil discharging port 302, when one of the first sealing ring 341 and the third sealing ring 343 is damaged, the lubricating oil in the lubricating cavity 306 leaks out, so that the oil pressure changes, and by using the change, the oil supply line is switched, the guide rod 55 is made of hard material, a part of the guide rod 55 leaks outside the reversing valve 52, so that the oil pressure is convenient for a user to control manually, the first elastic joint 53 and the second elastic joint 54 are deformable elastic components, when the oil pressure in the oil supply line 51 has certain pressure, the first elastic joint 53 or the second elastic joint 54 can be expanded, so that the other one is pressed and closed, when the oil pressure in the oil supply line 51 is shifted manually, the guide rod 55 is pressed and blocked until the pressure is stabilized, the other one is automatically pressed, when the pressure in the oil supply line is reduced, the pressed elastic joint is opened, the lubricating oil enters the other oil supply line 51 and reaches the stabilized pressure, one elastic joint is squeezed and closed, an oil supply pipeline is automatically switched, lubricating oil flows into the oil storage cavity 305 from the first oil filling channel 303, as shown in fig. 4, the lubricating oil pushes the sealing ring pushing block 32 above the lubricating oil, the second sealing ring 342 and the fourth sealing ring 344 elastically extend outwards and contact the inner wall surface of the conveying cylinder 1, the first sealing ring 341 and the third sealing ring 343 are contracted and do not contact the inner wall surface of the conveying cylinder 1 any more, replacement of the standby sealing ring 34 is realized, abrasion of the cylinder wall of the conveying cylinder 1 caused by damage of the sealing ring 34 can be reduced, and the conveying process can be continued.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.