CN117469121A - Pumping system and working machine - Google Patents

Pumping system and working machine Download PDF

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Publication number
CN117469121A
CN117469121A CN202311394974.8A CN202311394974A CN117469121A CN 117469121 A CN117469121 A CN 117469121A CN 202311394974 A CN202311394974 A CN 202311394974A CN 117469121 A CN117469121 A CN 117469121A
Authority
CN
China
Prior art keywords
port
cylinder
driving
communicated
conveying cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311394974.8A
Other languages
Chinese (zh)
Inventor
毛志兵
李昴
师朝阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sany Automobile Manufacturing Co Ltd
Original Assignee
Sany Automobile Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sany Automobile Manufacturing Co Ltd filed Critical Sany Automobile Manufacturing Co Ltd
Priority to CN202311394974.8A priority Critical patent/CN117469121A/en
Publication of CN117469121A publication Critical patent/CN117469121A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/002—Hydraulic systems to change the pump delivery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
    • F04B9/111—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members
    • F04B9/113—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by a double-acting liquid motor

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

The invention relates to the technical field of engineering machinery, and provides a pumping system and an operation machine, wherein the pumping system comprises a hopper for containing materials, a first conveying cylinder, a second conveying cylinder, a third conveying cylinder and a three-way pipe; the first conveying cylinder and the second conveying cylinder are communicated with the hopper; the three-way pipe is rotationally arranged on the hopper, the first port of the three-way pipe is communicated with the conveying pipe, the third port of the three-way pipe is coaxially arranged with the first port, the third port is communicated with the third conveying cylinder, and the second port can be communicated with the first conveying cylinder or the second conveying cylinder in a switching way when the three-way pipe rotates around the axis of the first port. When the second port of the three-way pipe is reversed, the third conveying cylinder conveys materials to the three-way pipe through the third port, so that the loss of concrete during the reversing of the three-way pipe is compensated, and the phenomena of concrete pumping stagnation and discontinuity of the three-way pipe in the reversing process are eliminated; the pumping system comprises three conveying cylinders, so that the stability of the actual pumping displacement can be ensured.

Description

Pumping system and working machine
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a pumping system and a working machine.
Background
The existing pumping system is generally pumping by driving a double-main oil cylinder to alternately reciprocate, but the S pipe can cause short-time concrete pumping stagnation and discontinuous pumping in the reversing process; and the stability of discharge capacity needs two master cylinders to be guaranteed to two conveying cylinder structures, but because the restriction of the switching speed of hydraulic pump discharge capacity, two master cylinders can't realize fast switching and can't compensate the partial loss of discharge capacity that causes when switching over to can't guarantee the stability of discharge capacity.
Disclosure of Invention
The invention provides a pumping system and a working machine, which are used for solving the defects that concrete is stopped and discontinuous in short time when an S pipe is reversed in the prior art, and the two main cylinders cannot realize quick switching and cannot compensate partial loss of displacement caused by reversing due to the limitation of the switching speed of the displacement of a hydraulic pump, so that the stability of the displacement cannot be ensured.
The invention provides a pumping system, which comprises a hopper, a first conveying cylinder, a second conveying cylinder, a third conveying cylinder and a three-way pipe, wherein,
the hopper is used for containing materials, and the first conveying cylinder and the second conveying cylinder are communicated with the hopper;
the three-way pipe is rotatably arranged on the hopper, a first port of the three-way pipe is used for being communicated with the conveying pipe, a third port of the three-way pipe is coaxially arranged with the first port, the third port is communicated with the third conveying cylinder, and a second port of the three-way pipe can be communicated with the first conveying cylinder or the second conveying cylinder in a switching manner when the three-way pipe rotates around the axis of the first port.
According to the present invention there is provided a pumping system further comprising:
the driving mechanism is used for driving the first conveying cylinder, the second conveying cylinder and the third conveying cylinder to suck or pump materials respectively, and is a pneumatic mechanism, a hydraulic mechanism or an electric mechanism.
According to the present invention there is provided a pumping system, the drive mechanism comprising:
the first driving piece is used for driving the piston of the first conveying cylinder to move so as to enable the first conveying cylinder to suck or pump materials;
the second driving piece is used for driving the piston of the second conveying cylinder to move so as to enable the second conveying cylinder to suck or pump materials;
and the third driving piece is used for driving the piston of the third conveying cylinder to move so as to enable the third conveying cylinder to suck or pump materials.
According to the pumping system provided by the invention, the first driving piece is a first driving oil cylinder, the second driving piece is a second driving oil cylinder, and the third driving piece is a third driving oil cylinder.
According to the present invention there is provided a pumping system further comprising:
the inlet of the first main valve is communicated with an oil outlet of a hydraulic oil tank of the working machine, a first working port of the first main valve is communicated with a rod cavity of the first driving oil cylinder, a second working port of the first main valve is communicated with a rod cavity of the second driving oil cylinder, and a rodless cavity of the first driving oil cylinder is communicated with a rodless cavity of the second driving oil cylinder; or, the first working port of the first main valve is communicated with the rodless cavity of the first driving oil cylinder, the second working port of the first main valve is communicated with the rodless cavity of the second driving oil cylinder, and the rod cavity of the first driving oil cylinder is communicated with the rod cavity of the second driving oil cylinder;
the inlet of the second main valve is communicated with the oil outlet of the hydraulic oil tank, the first working port of the second main valve is communicated with the rodless cavity of the third driving oil cylinder, and the second working port of the second main valve is communicated with the rod cavity of the third driving oil cylinder.
According to the present invention there is provided a pumping system further comprising:
the control pilot valve is used for controlling the reversing of the second main valve, an oil inlet of the control pilot valve and a first pilot port of the control pilot valve are respectively communicated with a rod cavity of the first driving oil cylinder, an outlet of the control pilot valve and a second pilot port of the control pilot valve are respectively communicated with a rodless cavity of the second driving oil cylinder, a first working port of the control pilot valve is communicated with a first pilot port of the second main valve, and a second working port of the control pilot valve is communicated with a second pilot port of the second main valve.
According to the present invention there is provided a pumping system further comprising:
the reversing mechanism is arranged on the hopper and used for driving the three-way pipe to rotate around the axis of the first port.
According to the present invention there is provided a pumping system, the reversing mechanism comprising:
the first reversing driving piece is used for driving the tee pipe to rotate along a first direction;
the second reversing driving piece is used for driving the tee pipe to rotate along a second direction;
wherein the first direction and the second direction are opposite directions.
According to the pumping system provided by the invention, the third port is rotatably connected with the third conveying cylinder, and a sealing element is arranged between the third port and the cylinder wall of the third conveying cylinder.
According to the pumping system provided by the invention, the hopper is provided with the first material port and the second material port, the first conveying cylinder is communicated with the first material port, the second conveying cylinder is communicated with the second material port, and the second port can be communicated with the first conveying cylinder through the first material port, or the second port can be communicated with the second conveying cylinder through the second material port.
The present invention also provides a work machine comprising a pumping system as claimed in any one of the preceding claims.
The invention provides a pumping system and a working machine, wherein the pumping system comprises a hopper, a first conveying cylinder, a second conveying cylinder, a third conveying cylinder and a three-way pipe, wherein the hopper is used for containing materials, and the first conveying cylinder and the second conveying cylinder are communicated with the hopper so that the first conveying cylinder and the second conveying cylinder can respectively suck materials from the hopper; the three-way pipe is rotatably arranged on the material port, and a first port of the three-way pipe can be used for being communicated with the conveying pipe so that materials can be conveyed out from the first port through the conveying pipe; the third port of the three-way pipe is coaxially arranged with the first port, the third port is communicated with the third conveying cylinder, and the second port can be communicated with the first conveying cylinder or the second conveying cylinder in a switching way when the three-way pipe rotates around the axis of the first port.
The three-way pipe is connected with the third conveying cylinder through the third port of the three-way pipe, and when the second port of the three-way pipe is reversed, the third conveying cylinder can convey the materials in the three-way pipe to the three-way pipe through the third port, so that the loss of concrete during the reversing of the three-way pipe can be compensated, and the phenomena of concrete pumping stagnation and discontinuity of the three-way pipe in the reversing process can be eliminated; and the pumping system is arranged in a three-conveying-cylinder structure, so that the stability of the actual pumping displacement can be ensured.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a diagram of the connection relationship between a hopper, a conveying cylinder and an oil cylinder provided by the invention;
FIG. 2 is a perspective view of a tee provided by the present invention;
FIG. 3 is a diagram of the connection relationship between the hopper and the reversing mechanism provided by the invention;
FIG. 4 is a schematic diagram of the hydraulic control provided by the present invention;
fig. 5 is an enlarged view of the connection relationship of the first, second and third driving cylinders in fig. 4.
Reference numerals:
1. a hopper; 2. a three-way pipe; 3. a first conveying cylinder;
4. a second conveying cylinder; 5. a third conveying cylinder; 6. a spectacle plate;
7. a first drive cylinder; 8. a second driving cylinder; 9. a third driving cylinder;
10. a washing chamber; 11. A first reversing oil cylinder; 12. The second reversing oil cylinder;
13. stirring paddles; 14. A first main valve; 15. A second main valve;
16. a third main valve; 17. Controlling the pilot valve; 18. A first main pump;
19. a second main pump; 20. a hydraulic oil tank; 21. a material pipe;
22. a shaft tube; 211. a second port; 212. a first port.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The pumping system and work machine of the present invention are described below in connection with fig. 1-5.
As shown in fig. 1-3, the pumping system provided by the invention can comprise a hopper 1, a first conveying cylinder 3, a second conveying cylinder 4, a third conveying cylinder 5 and a tee pipe 2.
Wherein the hopper 1 can be used for containing materials, and the first conveying cylinder 3 and the second conveying cylinder 4 can be communicated with the hopper 1, so that the first conveying cylinder 3 and the second conveying cylinder 4 can respectively suck materials from the hopper 1.
The three-way pipe 2 is rotatably arranged on the hopper 1, and a first port 212 of the three-way pipe 2 can be used for communicating with a conveying pipe so that materials can be conveyed out from the first port 212 through the conveying pipe; the third port of the tee 2 may be coaxially arranged with the first port 212, the third port may be in communication with the third delivery cylinder 5, and the tee 2 may be capable of switching communication between the second port 211 and the first delivery cylinder 3 or the second delivery cylinder 4 when rotated about the axis of the first port 212.
Specifically, the tee 2 may include a pipe 21 and a shaft tube 22, two ports of the pipe 21 are a first port 212 and a second port 211, respectively, a port of the shaft tube 22 communicating with the third delivery cylinder 5 may be a third port, the shaft tube 22 may be coaxially disposed with the first port 212, and the shaft tube 22 may communicate with the pipe 21 to form the tee 2.
Further, the rotation of the shaft tube 22 enables the rotation of the tube around the axis of the shaft tube 22 so that the second port 211 can be brought into communication with the first and second transfer cylinders 3 and 4.
It should be noted that, the shaft tube 22 may be a hollow tube, the shaft tube 22 is always in communication with the third conveying cylinder 5, and the third conveying cylinder 5 may suck the material in the material tube 21 through the shaft tube 22 and pump the material to the material tube 21 through the shaft tube 22, compared to the S-tube in which the driving shaft is a solid shaft in the prior art.
Here, when the first conveying cylinder 3 or the second conveying cylinder 4 pumps the material, the third conveying cylinder 5 may suck part of the material from the material pipe 21 through the shaft pipe 22, so that when the three-way pipe 2 is reversed, the third conveying cylinder 5 may convey the material inside the third conveying cylinder into the material pipe 21 of the three-way pipe 2 to compensate for the loss of the material when the three-way pipe 2 is reversed.
The three-way pipe 2 is connected with the third conveying cylinder 5 through the third port of the three-way pipe 2, and when the second port 211 of the three-way pipe 2 is reversed, the third conveying cylinder 5 can convey the materials in the three-way pipe 2 to the three-way pipe 2 through the shaft pipe 22, so that the loss of concrete during the reversing of the three-way pipe 2 can be compensated, and the phenomena of concrete pumping stagnation and discontinuity of the three-way pipe 2 during the reversing process can be eliminated; and the pumping system is arranged in a three-conveying-cylinder structure, so that the stability of the actual pumping displacement can be ensured.
In an alternative embodiment, the third port may be in rotational connection with the third transfer cylinder 5 and a seal is provided between the third port and the cylinder wall of the third transfer cylinder 5. In this way, mutual restriction between the third port and the third transfer cylinder 5 can be avoided, and leakage of material at the gap between the third port and the third transfer cylinder 5 when the tee 2 is rotated can be avoided.
In an alternative embodiment, the hopper 1 may be provided with a first port and a second port, the first conveying cylinder 3 may be in communication with the first port, the second conveying cylinder 4 may be in communication with the second port, and the second port 211 of the tee 2 may be in communication with the first conveying cylinder 3 through the first port, or the second port 211 of the tee 2 may be in communication with the second conveying cylinder 4 through the second port. In this way, the first conveying cylinder 3 and the second conveying cylinder 4 are convenient to pump materials to the material pipe 21 after sucking the materials from the hopper 1.
In an alternative embodiment, the inner wall of the hopper 1 may be provided with a spectacle plate 6, the spectacle plate 6 may be provided with two through holes, the two through holes may be respectively communicated with the first material port and the second material port, and the second port 211 of the three-way pipe 2 may be communicated with the first material port or the second material port through the through holes of the spectacle plate 6.
In an alternative embodiment, the hopper 1 is further provided with a discharge port, and the discharge port may be disposed on a side of the hopper 1 opposite to the glasses plate, and the discharge port may be communicated with the conveying pipe, and the first port 212 is rotationally connected with the discharge port.
In an alternative embodiment, the pumping system may further comprise stirring means for stirring the material in the hopper 1.
The stirring device may include a stirring paddle 13 and a stirring motor, the stirring paddle 13 may be disposed in the hopper 1 so as to be capable of stirring materials, the stirring motor may be disposed outside the hopper 1, and the stirring motor drives the stirring paddle 13 to rotate so as to stir the materials in the hopper 1.
In an alternative embodiment of the invention, the pumping system may further comprise a drive mechanism, which may be used to drive the first, second and third transfer cylinders 3, 4, 5, respectively, for sucking or pumping material.
Wherein, the driving mechanism can be a pneumatic mechanism or a hydraulic mechanism or an electric mechanism. In this way, the delivery cylinder may be driven to suck or pump material in a number of ways.
In an alternative embodiment, the driving mechanism may comprise a first driving member, a second driving member and a third driving member, the first driving member being operable to drive the piston movement of the first delivery cylinder 3 such that the first delivery cylinder 3 may suck or pump material; the second driving member may be used to drive the piston of the second conveying cylinder 4 to move so that the second conveying cylinder 4 may suck or pump material; the third driving member may be used to drive the piston of the third transfer cylinder 5 to move so that the third transfer cylinder 5 may suck or pump material.
In this embodiment, the first driving member may be a first driving cylinder 7, the second driving member may be a second driving cylinder 8, and the third driving member may be a third driving cylinder 9.
Here, the first driving member, the second driving member, and the third driving member may be cylinders.
In an alternative embodiment of the invention, as shown in fig. 4 and 5, the pumping system may further comprise a first main valve 14, the inlet P1 of the first main valve 14 may be in communication with the outlet of the hydraulic tank 20 of the work machine, the first main valve 14 being adapted to control the extension and retraction of the first and second drive cylinders 7, 8.
In the first manner, the first working port A1 of the first main valve 14 may communicate with the rod chamber of the first drive cylinder 7, the second working port B1 of the first main valve 14 may communicate with the rod chamber of the second drive cylinder 8, and the rod-less chamber of the first drive cylinder 7 and the rod-less chamber of the second drive cylinder 8. Thus, when the first main valve 14 is switched to the first working position, that is, when the inlet P1 of the first main valve 14 is communicated with the first working port A1 of the first main valve 14, hydraulic oil can enter the rod cavity of the first driving oil cylinder 7, so that the first driving oil cylinder 7 is contracted to drive the first conveying cylinder 3 to suck materials; at this time, the hydraulic oil in the rodless cavity of the first driving oil cylinder 7 flows into the rodless cavity of the second driving oil cylinder 8, so that the second driving oil cylinder 8 extends and the second conveying cylinder 4 is driven to pump materials; when the first main valve 14 is switched to the second working position, namely, the inlet P1 of the first main valve 14 is communicated with the second working port B1 of the first main valve 14, hydraulic oil can enter a rod cavity of the second driving oil cylinder 8, so that the second driving oil cylinder 8 contracts and the second conveying cylinder 4 is driven to suck materials; at this time, the hydraulic oil in the rodless cavity of the second driving oil cylinder 8 flows into the rodless cavity of the first driving oil cylinder 7, so that the first driving oil cylinder 7 extends and the first conveying cylinder 3 is driven to pump materials.
In the second manner, the first working port A1 of the first main valve 14 may communicate with the rodless chamber of the first drive cylinder 7, the second working port B1 of the first main valve 14 may communicate with the rodless chamber of the second drive cylinder 8, and the rod chamber of the first drive cylinder 7 and the rod chamber of the second drive cylinder 8. Thus, when the first main valve 14 is switched to the first working position, that is, when the inlet P1 of the first main valve 14 is communicated with the first working port A1 of the first main valve 14, hydraulic oil can enter the rodless cavity of the first driving oil cylinder 7, so that the first driving oil cylinder 7 is extended to drive the first conveying cylinder 3 to discharge materials, and at the moment, the hydraulic oil in the rod cavity of the first driving oil cylinder 7 flows into the rod cavity of the second driving oil cylinder 8, so that the second driving oil cylinder 8 is contracted to drive the second conveying cylinder 4 to suck materials; when the first main valve 14 is switched to the second working position, that is, when the inlet P1 of the first main valve 14 is communicated with the second working port B1 of the first main valve 14, hydraulic oil can enter the rodless cavity of the second driving oil cylinder 8, so that the second driving oil cylinder 8 is extended to drive the second conveying cylinder 4 to pump materials, and at the moment, hydraulic oil in the rod cavity of the second driving oil cylinder 8 flows into the rod cavity of the first driving oil cylinder 7, so that the first driving oil cylinder 7 is contracted to drive the first conveying cylinder 3 to suck materials.
The pumping system may further comprise a second main valve 15, the inlet P2 of the second main valve 15 may be in communication with the oil outlet of the hydraulic oil tank 20 of the work machine, the first working port A2 of the second main valve 15 may be in communication with the rodless chamber of the third drive cylinder 9, and the second working port B2 of the second main valve 15 may be in communication with the rod chamber of the third drive cylinder 9. Thus, when the second main valve 15 is switched to the first working position, that is, the inlet P2 of the second main valve 15 is communicated with the first working port A2 of the second main valve 15, and the second working port B2 of the second main valve 15 is communicated with the outlet T2 of the second main valve 15, the third driving oil cylinder 9 can be extended to drive the third conveying cylinder 5 to pump materials; when the second main valve 15 is switched to the second working position, that is, the inlet P2 of the second main valve 15 is communicated with the second working port B2 of the second main valve 15, the first working port A2 of the second main valve 15 is communicated with the outlet T2 of the second main valve 15, the third driving oil cylinder 9 can be contracted to drive the third conveying cylinder 5 to suck materials.
The telescopic end of the first driving oil cylinder 7 can be connected with the piston of the first conveying cylinder 3, so that the piston of the first conveying cylinder 3 can be driven to move through the telescopic action of the first driving oil cylinder 7 to drive the first conveying cylinder 3 to suck or pump materials.
The telescopic end of the second driving oil cylinder 8 can be connected with the piston of the second conveying cylinder 4, so that the piston of the second conveying cylinder 4 can be driven to move through the telescopic action of the second driving oil cylinder 8 to drive the second conveying cylinder 4 to suck or pump materials.
Here, since the rodless chambers of the first driving cylinder 7 and the second driving cylinder 8 are communicated, the pressures of the rodless chambers of the first driving cylinder 7 and the second driving cylinder 8 may be the same. The outlet T1 of the first main valve may be in communication with an oil return port of the hydraulic tank 20.
In an alternative embodiment of the invention, the pumping system may further comprise a control pilot valve 17, the control pilot valve 17 being operable to control the reversing of the second main valve 15 to control the retraction of the third drive cylinder 9 and thereby the switching of the third delivery cylinder 5 between suction and pumping.
Wherein the first working port a of the control pilot valve 17 may communicate with the first pilot port of the second main valve 15, and the second working port b of the control pilot valve 17 may communicate with the second pilot port of the second main valve 15; the inlet P of the control pilot valve 17 and the first pilot port of the control pilot valve 17 may be respectively communicated with the rod cavity of the first driving cylinder 7, the outlet t of the control pilot valve 17 and the second pilot port of the control pilot valve 17 may be respectively communicated with the rod-less cavity of the second driving cylinder 8, or the inlet P of the control pilot valve 17 and the first pilot port of the control pilot valve 17 may be respectively communicated with the rod-less cavity of the first driving cylinder 7, and the outlet t of the control pilot valve 17 and the second pilot port of the control pilot valve 17 may be respectively communicated with the rod cavity of the second driving cylinder 8.
Here, the telescopic end of the third driving cylinder 9 may be connected to the piston of the third conveying cylinder 5, so that the piston of the third conveying cylinder 5 may be driven to move by the telescopic movement of the third driving cylinder 9, so as to drive the third conveying cylinder 5 to suck or pump materials.
Specifically, the first working port a of the control pilot valve 17 may communicate with the first pilot port of the second main valve 15, and the second working port b of the control pilot valve 17 may communicate with the second pilot port of the second main valve 15; the oil inlet p of the control pilot valve 17 and the first pilot port of the control pilot valve 17 may be respectively communicated with the rod cavity of the first driving oil cylinder 7, the outlet t of the control pilot valve 17 and the second pilot port of the control pilot valve 17 may be respectively communicated with the rod-less cavity of the second driving oil cylinder 8, or the oil inlet p of the control pilot valve 17 and the first pilot port of the control pilot valve 17 may be respectively communicated with the rod-less cavity of the first driving oil cylinder 7, and the outlet t of the control pilot valve 17 and the second pilot port of the control pilot valve 17 may be respectively communicated with the rod cavity of the second driving oil cylinder 8.
Thus, when the first delivery cylinder 3 completes the discharging and reversing preparation for sucking the material, the first main valve 14 controls the hydraulic oil to enter the rod cavity of the first drive cylinder 7, the pressure of the rod cavity of the first drive cylinder 7 increases, and part of the hydraulic oil in the rod cavity of the first drive cylinder 7 flows into the oil inlet p and the first pilot port of the control pilot valve 17, so that the valve core of the control pilot valve 17 is switched to the first working position, even if the oil inlet of the control pilot valve 17 is communicated with the first working oil port a thereof, so as to supply the pilot oil to the first pilot oil port of the second main valve 15, so that the second main valve 15 is switched to the first working position, and the third drive cylinder 9 is controlled to extend, thereby driving the third delivery cylinder 5 to pump the material.
When the first conveying cylinder 3 pumps materials, the pressure of the rodless cavity of the first driving oil cylinder 7 is increased, namely, the pressure of the rodless cavity of the second driving oil cylinder 8 is increased, part of hydraulic oil in the rodless cavity of the second driving oil cylinder 8 flows into the oil return port t and the second pilot port of the control pilot valve 17, so that the valve core of the control pilot valve 17 is switched to the second working position, even if the oil return port t of the control pilot valve 17 is communicated with the second working oil port b thereof, the pilot oil is supplied to the second pilot oil port of the second main valve 15, so that the second main valve 15 is switched to the second working position, and the third driving oil cylinder 9 is controlled to shrink, thereby driving the third conveying cylinder 5 to suck materials.
Or when the first delivery cylinder 3 finishes the material sucking reversing preparation for discharging, the first main valve 14 controls the hydraulic oil to enter the rodless cavity of the first drive cylinder 7, the pressure of the rodless cavity of the first drive cylinder 7 is increased, and part of the hydraulic oil in the rodless cavity of the first drive cylinder 7 flows into the oil inlet p and the first pilot port of the control pilot valve 17, so that the valve core of the control pilot valve 17 is switched to the first working position, even if the oil inlet of the control pilot valve 17 is communicated with the first working oil port a thereof, so as to supply the pilot oil to the first pilot oil port of the second main valve 15, so that the second main valve 15 is switched to the first working position, and the third drive cylinder 9 is controlled to extend, thereby driving the third delivery cylinder 5 to pump materials.
When the first conveying cylinder 3 sucks materials, the pressure of the rod cavity of the first driving oil cylinder 7 is increased, namely, the pressure of the rod cavity of the second driving oil cylinder 8 is increased, part of hydraulic oil in the rod cavity of the second driving oil cylinder 8 flows into the oil return port t and the second pilot port of the control pilot valve 17, so that the valve core of the control pilot valve 17 is switched to the second working position, even if the oil return port t of the control pilot valve 17 is communicated with the second working port b thereof, pilot oil is supplied to the second pilot oil port of the second main valve 15, so that the second main valve 15 is switched to the second working position, and the third driving oil cylinder 9 is controlled to shrink, thereby driving the third conveying cylinder 5 to suck materials.
In this way, the second main valve 15 can be controlled to reverse through the reversing of the first main valve 14, namely the pressure difference formed by reversing the first driving oil cylinder 7 and the second driving oil cylinder 8, and the expansion and contraction of the third driving oil cylinder 9 can be realized only through hydraulic control, so that the pumping or sucking of the third conveying cylinder 5 is realized, an electric element is not needed, the control mode is reliable, and the cost is low.
In an alternative embodiment of the invention, the pumping system may further comprise a reversing mechanism, which may be provided on the hopper 1, and which may be used to drive the tee 2 in rotation about the axis of the shaft tube 22, to enable a switched communication of the pipe 21 of the tee 2 with the first and second conveying cylinders 3, 4.
In alternative embodiments, the reversing mechanism may include a first reversing drive that may be used to drive the tee 2 to rotate in a first direction and a second reversing drive that may be used to drive the tee 2 to rotate in a second direction, where the first and second directions may be opposite directions. In this way, the pipe 21 of the tee 2 is facilitated to rotate between the first and second delivery cylinders 3, 4 so as to be switchable in communication with the first and second delivery cylinders 3, 4.
Here, the first direction may be a clockwise direction and the second direction may be a counterclockwise direction.
In an alternative embodiment, the shaft tube 22 may be provided with a connection portion that is adapted to connect with the first reversing drive and the second reversing drive.
The first reversing driving piece can be a first reversing oil cylinder 11, the fixed end of the first reversing oil cylinder 11 can be rotationally connected with the hopper 1, and the telescopic end of the first reversing oil cylinder 11 can be rotationally connected with the connecting part; the second reversing driving piece can be a second reversing oil cylinder 12, the fixed end of the second reversing oil cylinder 12 can be rotationally connected with the hopper 1, and the telescopic end of the second reversing oil cylinder 12 can be rotationally connected with the connecting part.
In an alternative embodiment, the reversing mechanism may include a driving motor that may control the rotation of the shaft tube 22 to rotate the tube 21, thereby enabling the rotation of the tee 2.
In an alternative embodiment, the pumping system may further include a third main valve 16, the oil inlet P3 of the third main valve 16 may be in communication with the oil outlet of the hydraulic oil tank 20, the oil return port T3 of the third main valve 16 may be in communication with the oil return port of the hydraulic oil tank 20, the first working port A3 of the third main valve 16 may be in communication with the rodless chamber of the first reversing cylinder 11, and the second working port B3 of the third main valve 16 may be in communication with the rodless chamber of the second reversing cylinder 12, where the rod chambers of both the first reversing cylinder 11 and the second reversing cylinder 12 are in communication with the oil return port of the hydraulic oil tank 20.
In an alternative embodiment of the present invention, the pumping system may further include a first main pump 18 and a second main pump 19, oil inlets of the first main pump 18 and the second main pump 19 may be connected to a hydraulic oil tank 20, and an oil outlet of the first main pump 18 may be connected to an oil inlet of the first main valve 14 for supplying hydraulic oil to the first drive cylinder 7 or the second drive cylinder 8; an oil outlet of the second main pump 19 may be connected with an oil inlet of the third main valve 16 for supplying hydraulic oil to the first reversing cylinder 11 or the second reversing cylinder 12.
In an alternative embodiment of the invention, the pumping system may further comprise a washing chamber 10, the washing chamber 10 may be arranged between the first and second driving cylinders 7, 8 and the first and second conveying cylinders 3, 4, the washing chamber 10 may be used to wash the residues of the first and second conveying cylinders 3, 4 after each pumping to reduce wear of the cylinders of the first and second conveying cylinders 3, 4 and their pistons; the washing chamber 10 can cool and lubricate the piston, piston rod and piston rod sealing parts of the first conveying cylinder 3 and the second conveying cylinder 4, and the washing chamber 10 can also play a role of connecting the first conveying cylinder 3 with the first driving oil cylinder 7, the second conveying cylinder 4 and the second driving oil cylinder 8, and the pumping system can be mounted on an auxiliary beam of the working machine through a hanging plate, a pin shaft and the like.
It should be noted that, the first main valve, the third main valve and the control pilot valve may be three-position four-way reversing valves, and the second main valve may be two-position four-way reversing valves or two-position six-way reversing valves.
The present invention will now be described with reference to a work machine, which is described below with reference to the pumping system described above.
The invention provides a working machine which can comprise the pumping system of any embodiment.
The beneficial effects achieved by the working machine provided by the invention are consistent with those achieved by the pumping system provided by the invention, and will not be described in detail herein.
The working machine may be a concrete pump truck or other engineering machines.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (11)

1. The pumping system is characterized by comprising a hopper (1), a first conveying cylinder (3), a second conveying cylinder (4), a third conveying cylinder (5) and a three-way pipe (2), wherein,
the hopper (1) is used for containing materials, and the first conveying cylinder (3) and the second conveying cylinder (4) are communicated with the hopper (1);
the three-way pipe (2) is rotatably arranged on the hopper (1), a first port (212) of the three-way pipe (2) is used for being communicated with a conveying pipe, a third port of the three-way pipe (2) is coaxially arranged with the first port (212), the third port is communicated with the third conveying cylinder (5), and a second port (211) of the three-way pipe (2) can be communicated with the first conveying cylinder (3) or the second conveying cylinder (4) in a switching mode when the three-way pipe (2) rotates around the axis of the first port (212).
2. The pumping system of claim 1, further comprising:
the driving mechanism is used for driving the first conveying cylinder (3), the second conveying cylinder (4) and the third conveying cylinder (5) to suck or pump materials respectively, and the driving mechanism is a pneumatic mechanism or a hydraulic mechanism or an electric mechanism.
3. The pumping system of claim 2, wherein the drive mechanism comprises:
the first driving piece is used for driving the piston of the first conveying cylinder (3) to move so as to enable the first conveying cylinder (3) to suck or pump materials;
the second driving piece is used for driving the piston of the second conveying cylinder (4) to move so as to enable the second conveying cylinder (4) to suck or pump materials;
and the third driving piece is used for driving the piston of the third conveying cylinder (5) to move so as to enable the third conveying cylinder (5) to suck or pump materials.
4. A pumping system according to claim 3, characterized in that the first driving member is a first driving cylinder (7), the second driving member is a second driving cylinder (8), and the third driving member is a third driving cylinder (9).
5. The pumping system of claim 4, further comprising:
a first main valve (14), wherein an inlet of the first main valve (14) is communicated with an oil outlet of a hydraulic oil tank (20) of the working machine, a first working port of the first main valve (14) is communicated with a rod cavity of the first driving oil cylinder (7), a second working port of the first main valve (14) is communicated with a rod cavity of the second driving oil cylinder (8), and a rod-free cavity of the first driving oil cylinder (7) is communicated with a rod-free cavity of the second driving oil cylinder (8); or, a first working port of the first main valve (14) is communicated with a rodless cavity of the first driving oil cylinder (7), a second working port of the first main valve is communicated with a rodless cavity of the second driving oil cylinder (8), and a rod cavity of the first driving oil cylinder (7) is communicated with a rod cavity of the second driving oil cylinder (8);
the inlet of the second main valve (15) is communicated with the oil outlet of the hydraulic oil tank (20), the first working port of the second main valve (15) is communicated with the rodless cavity of the third driving oil cylinder (9), and the second working port of the second main valve (15) is communicated with the rod cavity of the third driving oil cylinder (9).
6. The pumping system of claim 5, further comprising:
the control pilot valve (17) is used for controlling the reversing of the second main valve (15), an inlet of the control pilot valve (17) and a first pilot port of the control pilot valve (17) are respectively communicated with a rod cavity of the first driving oil cylinder (7), an outlet of the control pilot valve (17) and a second pilot port of the control pilot valve (17) are respectively communicated with a rodless cavity of the second driving oil cylinder (8), a first working port of the control pilot valve (17) is communicated with a first pilot port of the second main valve (15), and a second working port of the control pilot valve (17) is communicated with a second pilot port of the second main valve (15).
7. The pumping system of claim 1, further comprising:
and the reversing mechanism is used for driving the tee pipe (2) to rotate around the axis of the first port (212).
8. The pumping system of claim 7, wherein the reversing mechanism comprises:
the first reversing driving piece is used for driving the tee pipe (2) to rotate along a first direction;
the second reversing driving piece is used for driving the tee pipe (2) to rotate along a second direction;
wherein the first direction and the second direction are opposite directions.
9. Pumping system according to claim 1, characterized in that the third port is in rotational connection with the third transfer cylinder (5) and that a seal is provided between the third port and the cylinder wall of the third transfer cylinder (5).
10. Pumping system according to claim 1, characterized in that the hopper (1) is provided with a first and a second port, the first conveying cylinder (3) is in communication with the first port, the second conveying cylinder (4) is in communication with the second port, and the second port (211) can be in communication with the first conveying cylinder (3) through the first port, or the second port (211) can be in communication with the second conveying cylinder (4) through the second port.
11. A work machine comprising a pumping system according to any of claims 1-10.
CN202311394974.8A 2023-10-25 2023-10-25 Pumping system and working machine Pending CN117469121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311394974.8A CN117469121A (en) 2023-10-25 2023-10-25 Pumping system and working machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311394974.8A CN117469121A (en) 2023-10-25 2023-10-25 Pumping system and working machine

Publications (1)

Publication Number Publication Date
CN117469121A true CN117469121A (en) 2024-01-30

Family

ID=89635671

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311394974.8A Pending CN117469121A (en) 2023-10-25 2023-10-25 Pumping system and working machine

Country Status (1)

Country Link
CN (1) CN117469121A (en)

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