CN109707587B - Hydraulic-based piston pump - Google Patents
Hydraulic-based piston pump Download PDFInfo
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- CN109707587B CN109707587B CN201811388703.0A CN201811388703A CN109707587B CN 109707587 B CN109707587 B CN 109707587B CN 201811388703 A CN201811388703 A CN 201811388703A CN 109707587 B CN109707587 B CN 109707587B
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Abstract
The invention discloses a hydraulic-based piston pump, wherein liquid output by a hydraulic pump enters a piston pump through a liquid inlet channel to provide power for the piston pump, the piston pump is designed with an automatic reversing function, so that when a piston moves to a bottom dead center, the liquid can enter a lower cavity of an upper cylinder to push the piston to move upwards, when the piston moves to the top dead center, the liquid can enter an upper cavity of a lower cylinder to push the piston to move downwards, and the liquid moves repeatedly so as to extract target liquid at the bottom of the piston pump upwards. The liquid outlet channel and the liquid inlet channel are both arranged in the piston pump body. Almost all channels of the device are arranged in the pump body of the piston pump, which is very beneficial to the integration of the piston pump and leads the device to be more exquisite and more efficient.
Description
Technical Field
The present invention relates to a piston pump, and more particularly, to a hydraulic-based piston pump.
Background
Similar to the chinese patent with publication No. 100497882C entitled "hydraulic oil extraction method and apparatus", a hydraulic oil extraction apparatus is disclosed, in which a piston pump is used, which uses the existing reversing valve and designs a complicated and long pipe, and the pipe is located outside the pump body of the piston pump, which is very disadvantageous for the integration of the apparatus and the improvement of efficiency. This is merely an example of a piston pump. In addition, many piston pumps require a vacuum to be applied to the chambers of the pistons, which on the one hand leads to high costs and on the other hand can lead to air leakage and thus to poor performance.
Disclosure of Invention
The invention aims to solve the technical problem of providing a hydraulic-based piston pump, and designs a novel hydraulic-based piston pump which can realize the function of automatically reversing the piston pump under the conditions of not needing to vacuumize and reducing pipeline connection.
In order to achieve the purpose, the invention adopts the following technical scheme:
a hydraulic-based piston pump comprises a piston pump body, wherein the piston pump body comprises an upper pump body positioned at the upper part, a reversing pump body positioned at the middle part and a lower pump body positioned at the lower part;
an upper cylinder barrel is arranged in the upper pump body, an upper piston is arranged in the upper cylinder barrel, and the upper cylinder barrel is divided into an upper cylinder barrel upper cavity positioned above and an upper cylinder barrel lower cavity positioned below by the upper piston;
a lower cylinder barrel is arranged in the lower pump body, a lower piston is arranged in the lower cylinder barrel, and the lower cylinder barrel is divided into a lower cylinder barrel upper cavity positioned above and a lower cylinder barrel lower cavity positioned below by the lower piston;
the reversing pump body is in a hollow column shape, and a piston rod penetrates through a hollow area of the reversing pump body to connect the upper piston and the lower piston to two ends;
the piston pump also comprises a liquid inlet channel which is communicated with the output end of the hydraulic pump and is used as power input, and a liquid outlet channel which is used for collecting target liquid pumped by the piston pump; the liquid inlet channel and the liquid outlet channel are both arranged in the piston pump body;
a first channel hole, a second channel hole, a third channel hole, a fourth channel hole and a fifth channel hole are sequentially and equidistantly formed in the inner wall of the reversing pump body from top to bottom;
the first channel hole and the fifth channel hole are communicated with the liquid outlet channel;
the second passage hole is communicated with the lower cavity of the upper cylinder barrel;
the third channel hole is communicated with the liquid inlet channel;
the fourth channel hole is communicated with the upper cavity of the lower cylinder barrel;
a slide valve capable of moving axially is fixed on the inner wall of the reversing pump body in a clinging manner through friction force, and a first groove and a second groove are sequentially formed in the outer wall of the slide valve from top to bottom along the axial direction;
when the lower piston moves to a top dead center, the lower piston pushes the sliding valve to move to the top dead center, meanwhile, the first groove communicates the first channel hole with the second channel hole, and the second groove communicates the third channel hole with the fourth channel hole;
when the upper piston moves to the lower dead point, the upper piston pushes the sliding valve to move to the lower dead point, meanwhile, the first groove communicates the second channel hole with the third channel hole, and the second groove communicates the fourth channel hole with the fifth channel hole;
the bottom of the lower cylinder barrel lower chamber is also connected with a first one-way valve used for guiding the target liquid to the lower cylinder barrel lower chamber;
the lower cavity of the lower cylinder barrel is communicated with the liquid outlet channel through a second one-way valve which leads to the liquid outlet channel;
the upper cavity of the upper cylinder barrel is communicated with the liquid outlet oil pipe through a third one-way valve which guides the liquid outlet oil pipe;
the upper cavity of the upper cylinder barrel is communicated with the liquid outlet channel through a fourth one-way valve which leads to the upper cavity of the upper cylinder barrel.
A liquid outlet oil pipe can be arranged above the upper cylinder barrel and is communicated with the liquid outlet channel; the liquid outlet oil pipe is also communicated with the input end of the hydraulic pump.
And a liquid inlet oil pipe can be arranged above the upper cylinder barrel, one end of the liquid inlet oil pipe is communicated with an output port of the hydraulic pump, and the other end of the liquid inlet oil pipe is communicated with the liquid outlet channel.
The inner wall of the slide valve can be tightly attached to a fixed valve signal pipe, the axial length of the valve signal pipe is longer than that of the reversing pump body, and the valve signal pipe can extend into the lower cavity of the upper cylinder barrel or the upper cavity of the lower cylinder barrel; when the lower piston moves to the top dead center, the lower piston pushes the valve sleeve to move to the top dead center, and meanwhile, the valve sleeve pushes the sliding valve to move to the top dead center; when the upper piston moves to the lower dead point, the upper piston pushes the valve sleeve to move to the lower dead point, and meanwhile, the valve sleeve pushes the sliding valve to move to the lower dead point.
The invention has the advantages that almost all the channels are arranged in the pump body of the piston pump, which is very beneficial to the integration of the piston pump and leads the device to be more exquisite; also in this case the liquid stroke is the shortest and the piston movement efficiency will be higher; the connection of pipelines is omitted, on one hand, resources are saved, and on the other hand, leakage of liquid possibly generated at the connection port is reduced. In addition, the reversing assembly is skillfully designed for the piston pump, and the conduction of each chamber of the piston is skillfully designed, so that the piston pump can run very smoothly without vacuumizing, and the efficiency of piston movement is high.
Drawings
Fig. 1 and 2 are exploded views of the apparatus of the present invention when the spool valve is moved to the top dead center after the oil recovery device is incorporated, wherein fig. 1 is the upper half and fig. 2 is the lower half;
FIG. 3 is a schematic view of the reversing pump body when the spool valve is moved to bottom dead center.
In the figure, 1, an upper pump body, 11, an upper cylinder, 12, an upper cylinder upper chamber, 13, an upper piston, 14, an upper cylinder lower chamber, 2, a reversing pump body, 21, a slide valve, 22, a valve communication pipe, 3, a lower pump body, 31, a lower cylinder, 32, a lower cylinder upper chamber, 33, a lower piston, 34, a lower cylinder lower chamber, 35, a piston rod, 41, a first passage hole, 42, a second passage hole, 43, a third passage hole, 44, a fourth passage hole, 45, a fifth passage hole, 51, a first groove, 52, a second groove, 61, a liquid inlet passage, 62, a liquid outlet passage, 71, a first check valve, 72, a second check valve, 73, a third check valve, 74, a fourth check valve, 8, a hydraulic pump, 81, a power liquid output pipe, 82, a heater, 83, an insulating pipe joint, 84, an insulating sealing box, 91, a liquid inlet pipe, 911, an insulating centralizer, 912, a hydraulic pipe joint, 92. the device comprises a longitudinal oil pipe 93, a transverse oil pipe 10, a master control cabinet 101, a first cable 102, a second cable 103, a temperature sensor 104, a liquid level pressure sensor 105 and a flow sensor.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings. In order to show the practicability of the piston pump more clearly, the piston pump is combined with an oil extraction device, so that the action of the piston pump is shown in the oil extraction process. Since the apparatus diagram is large and some fine content is involved therein after the oil recovery apparatus is incorporated, the overall diagram of the apparatus is broken down into fig. 1 and 2; in order to show where the two images are spliced, the two images are overlapped at the splicing part for a small part. Fig. 1 and 2 show the device in which the slide valve 21 moves to the top dead center, and fig. 3 is also provided in order to show the situation in which the slide valve 21 moves to the bottom dead center, but fig. 3 only shows the situation in which the pump body 2 is reversed in a highlighted manner because the rest of the device is the same as fig. 1 and 2. This is described next in conjunction with these three figures.
First, a brief description is given of the basic ideas and contents of the oil recovery process for easy understanding.
The basic process of pumping oil with the newly designed piston pump is: 8 output fluid of hydraulic pump gets into the piston pump through going into liquid passageway 61 and provides power for the piston pump, the piston pump design has the automatic reversing function, make when the piston removes to bottom dead center, thereby fluid can get into cylinder 14 down and promote the piston and move up, when the piston removes to the top dead center, thereby fluid can get into down cylinder and go up cavity 32 and promote the piston and move down, so motion repeatedly, thereby come in the extraction of oil reservoir fluid bottom the piston pump, and with one of them some fluid and hydraulic pump 8 formation circulation. Some of the problems involved here are how to make the piston realize the automatic reversing function, how to make the piston move forward (not to say that only one end of the piston is flushed with liquid to make the piston move smoothly, but the other end of the piston also affects the movement of the piston), how to collect the pumped oil, and so on. This device will be systematically described next.
First, a piston pump will be described. The device with hatching in the figures represents a piston pump comprising a piston pump body (in principle, the piston pump body is not essentially different from the piston pump body; the piston pump body is intended to describe the function of the piston pump, i.e. to enable the movement of the piston, and the piston pump body is intended to describe the device itself or the structure; as if it were a cup and a cup body), which for the sake of convenience is divided into three parts, an upper body 1 located above, a reversing body 2 located in the middle and a lower body 3 located below; these three regions are separated by the bottom surface of the upper cylinder 11 and the top surface of the lower cylinder 31, which will be described later, as dividing lines;
an upper cylinder barrel 11 is arranged in the upper pump body 1, an upper piston 13 is arranged in the upper cylinder barrel 11, and the upper cylinder barrel 11 is divided into an upper cylinder barrel upper chamber 12 and an upper cylinder barrel lower chamber 14 by the upper piston 13; a lower cylinder 31 is arranged in the lower pump body 3, a lower piston 33 is arranged in the lower cylinder 31, and the lower cylinder 31 is divided into a lower cylinder upper cavity 32 and a lower cylinder lower cavity 34 by the lower piston 33; the upper piston 13 and the lower piston 33 are connected by a piston rod 35;
it can be seen that if the upper cylinder 11 and the lower cylinder 31 are both completely closed and each cylinder is also divided into two completely closed chambers by a piston, the piston cannot move (unless a vacuum is drawn) because of the pressure; as will be described later, the four chambers are all in communication with the outside so as to be movable and capable of pumping oil.
The reversing pump body 2 located between the upper cylinder 11 and the lower cylinder 31 mainly performs a reversing function, and is a hollow cylinder, and the piston rod 35 described above passes through the hollow area of the reversing pump body 2. The reversing pump body 2 mainly plays a role in reversing, which will be described later.
The device also comprises a hydraulic pump 8, wherein the output end of the hydraulic pump 8 is connected with a power fluid output pipeline 81, the power fluid output pipeline 81 is connected with a fluid inlet oil pipe 91 through an insulating pipe joint 83, and the fluid inlet oil pipe 91 can convey oil serving as power to the piston pump; in addition, there is a liquid outlet pipe (the liquid outlet pipe includes a longitudinal oil pipe 92 and a transverse oil pipe 93, which will be described later) connected to the top end of the pump body of the piston pump, and the liquid outlet pipe will collect the oil pumped by the piston pump, and transport most of the oil out, and return another small part of the oil to the input port of the hydraulic pump 8 to form a circulation.
In order to convey the oil in the oil inlet pipe 91 to the piston pump, an oil inlet channel 61 is arranged in the pump body of the piston pump, and the oil inlet pipe 91 is communicated with the oil inlet channel 61; similarly, a liquid outlet channel 62 is arranged in the pump body of the piston pump, and a liquid outlet oil pipe is communicated with the liquid outlet channel 62; after the oil output by the hydraulic pump 8 enters the liquid inlet channel 61 from the oil inlet pipe 91, the input oil should carry the newly extracted oil out of the liquid outlet channel 62 and enter the liquid outlet pipe; it will be described how the inlet channel 61 and the outlet channel 62 form a circuit and how the piston is moved in the process.
A first channel hole 41, a second channel hole 42, a third channel hole 43, a fourth channel hole 44 and a fifth channel hole 45 are sequentially arranged on the inner wall of the reversing pump body 2 from top to bottom at equal intervals;
the first channel hole 41 and the fifth channel hole 45 are both communicated with the liquid outlet channel 62;
the second passage hole 42 communicates with the upper cylinder lower chamber 14;
the third passage hole 43 is communicated with the liquid inlet passage 61;
the fourth passage hole 44 communicates with the lower cylinder upper chamber 32;
the above communication is achieved by a channel provided in the pump body of the piston pump.
The inner wall of the reversing pump body 2 is tightly attached and fixed with the slide valve 21 capable of moving axially through friction force (that is, under the action of no external force, the slide valve 21 is fixed through friction force, once a large enough external axial force is applied, the slide valve 21 can move axially), the outer wall of the slide valve 21 is provided with a first groove 51 and a second groove 52 from top to bottom in sequence along the axial direction, and the positions of the first groove 51 and the second groove 52 are easily and properly designed, so that the following conditions can be met:
when the spool valve 21 moves to the top dead center, the first groove 51 communicates the first passage hole 41 with the second passage hole 42, and the second groove 52 communicates the third passage hole 43 with the fourth passage hole 44;
when the spool 21 moves to the bottom dead center, the first recess 51 communicates the second passage hole 42 with the third passage hole 43, and the second recess 52 communicates the fourth passage hole 44 with the fifth passage hole 45;
however, it can be seen from the figures that the first groove 51 and the second groove 52 are both axially symmetrical, in fact because the first groove 51 and the second groove 52 are both annular grooves, and therefore the cross-sectional view will cut out two of each annular groove. The annular groove has the advantages that the channel hole can be inserted in the whole ring range, so that the method is more convenient; in principle, however, only a small non-annular region is formed as a groove to achieve the function of communicating the two passage holes.
There is also a problem how the slide valve 21 can move?, after all we say that the slide valve 21 is fixed by friction and needs to be pushed by external force to realize axial movement;
of course, utilize a piston! When the upper piston 13 moves to the bottom dead center, the slide valve 21 is pushed to the bottom dead center, and when the lower piston 33 moves to the top dead center, the slide valve 21 is pushed to the top dead center. However, in the design of the present invention, this is indirect:
the inner wall of the slide valve 21 is also tightly fixed with a valve sleeve 22, the axial length of the valve sleeve 22 is longer than that of the reversing pump body 2, so that when the valve sleeve 22 is at the top dead center, a small section is exposed out of the lower cavity 14 of the upper cylinder barrel, and when the valve sleeve 22 is at the bottom dead center, a small section is exposed out of the upper cavity 32 of the lower cylinder barrel; the length of the exposed small segment can be selected according to actual conditions.
Next, when the lower piston 33 moves to the top dead center, the lower piston 33 will push the valve sleeve 22 to move to the top dead center, and the valve sleeve 22 will push the slide valve 21 to move to the top dead center; when the upper piston 13 moves to the lower dead point, the upper piston 13 pushes the valve sleeve 22 to move to the lower dead point, and meanwhile, the valve sleeve 22 pushes the slide valve 21 to move to the lower dead point; in principle, however, it is also possible to use the valve sleeve 22 as part of the slide valve 21, so that both are inherently fixed, but only in that the valve sleeve 22 has a "probe" projecting into the upper cylinder lower chamber 14 or the lower cylinder upper chamber 32 for the piston to push, which is deliberately separated; that is, the design of the spool valve 21 configuration may be such that the piston is able to push the spool valve 21; in any case, the expression that the upper piston 13 or the lower piston 33 pushes the slide valve 21, either indirectly or directly, is unproblematic.
The operation of the entire piston pump can be described by explaining several check valves:
the bottom of the lower cylinder lower chamber 34 is also connected with a first one-way valve 71 used for guiding oil layer oil to the lower cylinder lower chamber 34;
the lower cylinder barrel lower chamber 34 is communicated with the liquid outlet channel 62 through a second one-way valve 72 which is guided to the liquid outlet channel 62;
the upper cylinder barrel upper chamber 12 is communicated with the liquid outlet oil pipe through a third one-way valve 73 leading to the liquid outlet oil pipe;
the upper cylinder barrel upper chamber 12 is communicated with the liquid outlet channel 62 through a fourth one-way valve 74 which leads to the upper cylinder barrel upper chamber 12;
next, describing the operation of the whole piston pump, first, imagine that the slide valve 21 moves to the bottom dead center, and at this time, the oil enters the upper cylinder lower chamber 14 from the liquid inlet channel 61, the piston moves upward accordingly, the volume of the lower cylinder lower chamber 34 increases, and the oil is drawn into the lower cylinder lower chamber 34 from the bottom through the first check valve 71; next, the slide valve 21 is pushed to the top dead center by the lower piston 33, at this time, the oil enters the lower cylinder upper chamber 32 from the oil inlet channel 61, the piston moves downwards, and then the oil in the lower cylinder lower chamber 34 enters the oil outlet channel 62 through the second check valve 72, and further enters the oil outlet pipe, and in the process, simultaneously enters the upper cylinder upper chamber 12 through the fourth check valve 74 (this enables the upper piston 13 to move downwards); the upper piston 13 pushes the slide valve 21 to move to the bottom dead center, the oil output from the liquid inlet channel 61 enters the upper cylinder upper chamber 12, the piston moves upwards, the oil in the oil layer continues to enter the lower cylinder lower chamber 34 through the first check valve 71, the oil in the upper cylinder upper chamber 12 enters the liquid outlet pipe through the third check valve 73, and the lower piston 33 continues to push the slide valve 21, so that the cyclic reciprocation … … can be seen, the oil exists in two chambers of the two cylinders in the working process, and the piston can move smoothly without vacuumizing.
Next, the oil pipe portion will be described with emphasis. As described above, the oil pipe is divided into the liquid inlet pipe 91 and the liquid outlet pipe, which respectively function to input oil to the piston pump and collect the pumped oil; the liquid outlet oil pipe is designed into two parts, namely a longitudinal oil pipe 92 and a transverse oil pipe 93; the longitudinal oil pipe 92 is arranged above the piston pump body, and the transverse oil pipe 93 is vertically connected with the longitudinal oil pipe 92 and communicated with the longitudinal oil pipe 92; the transverse oil pipe 93 is provided with an opening for outputting oil, and in addition, the transverse oil pipe 93 is connected with the input end of the hydraulic pump 8, so that a hydraulic circuit can be formed.
For the inlet pipe 91, which has a smaller radius than the longitudinal pipe 92, it passes through the top of the longitudinal pipe 92 via the insulating sealing box 84 and is connected above the piston pump body via the hydraulic union 912 (electrically conductive); note also that the other end of the inlet pipe 91 is connected to the power fluid outlet pipe 81 of the hydraulic pump 8 via an insulated pipe joint 83, so that the inlet pipe 91, the hydraulic pipe joint 912, the piston pump body, the outlet pipe (longitudinal pipe 92) form an unclosed electrically conductive path, while the inlet pipe 91 and the outlet pipe are insulated. Such a conductive path is intended to additionally illustrate some heating of the oil pipe:
the device further comprises a main control cabinet 10, from which two cables, called first cable 101 and second cable 102 respectively, extend from the main control cabinet 10 and are connected to the fluid inlet pipe 91 (the part of the fluid inlet pipe 91 connected to the outside of the longitudinal oil pipe 92, i.e. if the top surface of the longitudinal oil pipe 92 divides the fluid inlet pipe 91 into an upper fluid inlet pipe and a lower fluid inlet pipe, the cables are connected to the upper fluid inlet pipe) and the longitudinal oil pipe 92, so that the main control cabinet 10, the fluid inlet pipe 91, the hydraulic pipe joint 912 (in principle, it is not necessary to describe the hydraulic pipe joint 912, the fluid inlet pipe 91 can be electrically connected with the piston pump body by other means, such as by direct welding, the piston pump body and the longitudinal oil pipe 92 form an electrically conductive loop, and the main control cabinet 10 outputs 38V/400A via the first cable 101 and the second cable 102 (this is only in a substantial range, current or voltage can be varied to vary the heating intensity) double-pulse direct current, so that the heating effect of the current heats both the fluid feed line 91 and the longitudinal oil line 92. The transverse oil pipe 93 is also provided with a temperature sensor 103, so that the temperature of the finally output oil can be measured, the temperature sensor 103 can transmit data to the master control cabinet 10 through a lead, and the master control cabinet 10 can properly adjust the current of the double-pulse direct current according to the feedback temperature value, so that the temperature range can be properly controlled.
In addition, a heater 82 may be installed on the power fluid output pipe 81. In addition, an insulating centralizer 911 may be further installed on the outer wall of the lower fluid inlet pipe 91.
In addition to the installation of the temperature sensor 103 to enable temperature adjustment, a level pressure sensor 104 may be provided above the upper pump body 1, and a flow sensor 105 may be provided near the outlet of the transverse oil pipe 93, both connected to the general control cabinet 10. The bottom hole liquid level pressure signal detected by the liquid level pressure sensor 104 and the flow information detected by the flow sensor 105 are transmitted to the control unit in the master control cabinet 10 through a dedicated cable, and the control unit compares the manually set flow value or pressure value and intelligently adjusts the flow rate and flow rate of the hydraulic pump 8 to be stabilized at the set value.
The main control cabinet 10 is internally provided with a power supply system, a frequency converter, a temperature control display part, a 38V/400A double-pulse direct-current power supply, a flow, a temperature and oil well liquid level data storage, remote wireless transmission, a liquid level intelligent control stop-start system, an intelligent temperature control system and the like, thereby realizing the functions, converting data such as the indication of the flow sensor 105, the liquid level pressure sensor 104 and the temperature sensor 103 in the system, the stop-start running time of equipment and the like into wireless data signals, and carrying out remote data transmission and interaction with users on the internet through a mobile network terminal and an antenna which are arranged in the main control cabinet 10.
Although only the function of the piston pump in the process of pumping oil is described above, it is obvious that other target fluids can be pumped by the piston pump by means of the power input of the hydraulic pump.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (5)
1. The hydraulic-based piston pump is characterized by comprising a piston pump body, wherein the piston pump body comprises an upper pump body positioned at the upper part, a reversing pump body positioned at the middle part and a lower pump body positioned at the lower part;
an upper cylinder barrel is arranged in the upper pump body, an upper piston is arranged in the upper cylinder barrel, and the upper piston divides the upper cylinder barrel into an upper cylinder barrel upper cavity positioned above and an upper cylinder barrel lower cavity positioned below;
a lower cylinder barrel is arranged in the lower pump body, a lower piston is arranged in the lower cylinder barrel, and the lower piston divides the lower cylinder barrel into a lower cylinder barrel upper cavity positioned above and a lower cylinder barrel lower cavity positioned below;
the reversing pump body is in a hollow column shape, and a piston rod penetrates through a hollow area of the reversing pump body to connect the upper piston and the lower piston to two ends;
the piston pump also comprises a liquid inlet channel which is communicated with the output end of the hydraulic pump and is used as power input, and a liquid outlet channel which is used for collecting target liquid pumped by the piston pump; the liquid inlet channel and the liquid outlet channel are both arranged in the piston pump body;
a first channel hole, a second channel hole, a third channel hole, a fourth channel hole and a fifth channel hole are sequentially arranged on the inner wall of the reversing pump body at equal intervals from top to bottom;
the first channel hole and the fifth channel hole are communicated with the liquid outlet channel;
the second passage hole is communicated with the lower cavity of the upper cylinder barrel;
the third channel hole is communicated with the liquid inlet channel;
the fourth channel hole is communicated with the upper cavity of the lower cylinder;
the inner wall of the reversing pump body is tightly attached and fixed with a sliding valve capable of moving axially through friction force, and the outer wall of the sliding valve is provided with a first groove and a second groove from top to bottom in sequence along the axial direction;
when the lower piston moves to a top dead center, the lower piston pushes the slide valve to move to the top dead center, meanwhile, the first groove communicates the first passage hole with the second passage hole, and the second groove communicates the third passage hole with the fourth passage hole;
when the upper piston moves to the bottom dead center, the upper piston pushes the slide valve to move to the bottom dead center, meanwhile, the first groove communicates the second channel hole with the third channel hole, and the second groove communicates the fourth channel hole with the fifth channel hole;
the bottom of the lower cylinder barrel lower chamber is also connected with a first one-way valve used for guiding the target liquid to the lower cylinder barrel lower chamber;
the lower cavity of the lower cylinder barrel is communicated with the liquid outlet channel through a second one-way valve which leads to the liquid outlet channel;
the upper cavity of the upper cylinder barrel is communicated with the liquid outlet oil pipe through a third one-way valve which leads to the liquid outlet oil pipe;
the upper cavity of the upper cylinder barrel is communicated with the liquid outlet channel through a fourth one-way valve which leads to the upper cavity of the upper cylinder barrel.
2. The hydraulic-based piston pump as claimed in claim 1, wherein a liquid outlet pipe is further disposed above the upper cylinder, and the liquid outlet pipe is communicated with the liquid outlet channel.
3. The hydraulic-based piston pump of claim 2, wherein the outlet conduit is further in communication with an input of the hydraulic pump.
4. The hydraulic-based piston pump as claimed in claim 1, wherein a fluid inlet pipe is further disposed above the upper cylinder, one end of the fluid inlet pipe is communicated with an output port of the hydraulic pump, and the other end of the fluid inlet pipe is communicated with the fluid inlet passage.
5. The hydraulic-based piston pump as claimed in claim 1, wherein said slide valve inner wall is further tightly fixed with a valve tube, an axial length of said valve tube is longer than an axial length of said reversing pump body, and said valve tube can be extended into said upper cylinder lower chamber or said lower cylinder upper chamber; when the lower piston moves to a top dead center, the lower piston pushes the valve sleeve to move to the top dead center, and meanwhile, the valve sleeve pushes the slide valve to move to the top dead center; when the upper piston moves to the bottom dead center, the upper piston pushes the valve signal pipe to move to the bottom dead center, and meanwhile, the valve signal pipe pushes the sliding valve to move to the bottom dead center.
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| CN201811388703.0A CN109707587B (en) | 2018-11-21 | 2018-11-21 | Hydraulic-based piston pump |
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| CN201811388703.0A CN109707587B (en) | 2018-11-21 | 2018-11-21 | Hydraulic-based piston pump |
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| CN109707587B true CN109707587B (en) | 2020-01-07 |
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| DE102006010122A1 (en) * | 2004-11-18 | 2007-08-30 | Technische Universität Dresden | Combined piston-expander-compressor for use in e.g. cooling system, has control valve provided for controlling piston rod, and attachment plate arranged in attachment housing that is attached to cylinder of expansion stage |
| CN1963141A (en) * | 2006-11-16 | 2007-05-16 | 叶少华 | Hydraulic oil production method and device |
| CN201180635Y (en) * | 2008-04-18 | 2009-01-14 | 刘运林 | Hydraulic double-acting rodless pump |
| CN101545470A (en) * | 2009-04-17 | 2009-09-30 | 李洪敏 | Ground hydraulic augmented injection pump |
| CN105986981A (en) * | 2015-02-13 | 2016-10-05 | 彭道琪 | Pressure fluid driven reciprocating pump |
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