CN111287923A - Underground grouting pump - Google Patents
Underground grouting pump Download PDFInfo
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- CN111287923A CN111287923A CN202010079461.8A CN202010079461A CN111287923A CN 111287923 A CN111287923 A CN 111287923A CN 202010079461 A CN202010079461 A CN 202010079461A CN 111287923 A CN111287923 A CN 111287923A
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- 230000033001 locomotion Effects 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims description 47
- 238000002347 injection Methods 0.000 claims 4
- 239000007924 injection Substances 0.000 claims 4
- 230000010354 integration Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 133
- 238000000034 method Methods 0.000 description 17
- 238000004891 communication Methods 0.000 description 8
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/02—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having two cylinders
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/138—Plastering the borehole wall; Injecting into the formation
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- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention belongs to the technical field of underground grouting pumps. The invention discloses an underground grouting pump, which comprises a shell, a cylinder barrel, a piston, a first plunger, a reversing assembly and a first spring, wherein the shell is provided with a P port connected with an oil inlet pipe and a T port connected with an oil outlet pipe, the cylinder barrel is positioned in the shell, the piston and the reversing assembly are positioned in the cylinder barrel, the piston can axially reciprocate under the action of high-pressure oil, the cylinder barrel can axially reciprocate relative to the shell under the control of the reversing assembly and the first spring, so that two sides of the piston are respectively communicated with the high-pressure oil alternately, and the automatic reversing reciprocating movement of the underground grouting pump is realized. The underground grouting pump can automatically reverse and reciprocate under the driving of hydraulic pressure, has simple and compact structure, low manufacturing cost and high integration level, can omit the use of a reversing valve, does not need electric control, avoids unstable factors of electric appliances, can work for a long time and has long service life.
Description
Technical Field
The invention belongs to the technical field of underground grouting pumps, and particularly relates to an underground grouting pump capable of automatically reciprocating.
Background
The construction drilling is a necessary method for exploring geological structures and coal bed occurrence and solving disasters such as mine gas, water, top and bottom plates and the like. The method is also an essential step for grouting and sealing the drilled hole, and at present, the common equipment for grouting and sealing the drilled hole in the mine is a pneumatic grouting pump. The pneumatic grouting pump mainly utilizes underground compressed air to push a cylinder piston to reciprocate in a cylinder, and the cylinder piston drives a grouting piston to reciprocate so as to realize the actions of sucking and grouting slurry. However, the existing pneumatic grouting pump can cause limited grouting pressure under the condition of insufficient power of underground compressed air, so that compression equipment and a compressed air pipeline are often required to be independently equipped, the cost of grouting and hole sealing is increased, and the existing pneumatic grouting pump is complex in transmission device, high in failure rate, heavy and bulky in body shape and difficult to transfer underground. In order to solve the problem, a hydraulic grouting pump appears in the prior art, although the hydraulic grouting pump can overcome some defects of a pneumatic grouting pump, a hydraulic flow distribution device needs to be specially configured, the whole system is complex, and the hydraulic grouting pump is high in failure rate and inconvenient to move in the using process.
Disclosure of Invention
In order to solve the problems of the conventional underground grouting pump, the invention provides an underground grouting pump with a brand-new structural form. The underground grouting pump comprises a shell, a cylinder barrel, a piston, a first plunger, a reversing assembly and a first spring; the first plunger and the piston are fixedly connected and move synchronously;
the device comprises a shell, a control chamber, a first working chamber, a first liquid inlet, a first liquid outlet, a second working chamber, a second liquid inlet, a second liquid outlet, a third working chamber, a fourth working chamber, a fifth working chamber and a sixth working chamber, wherein the control chamber and the first working chamber are mutually independent;
the cylinder barrel is positioned in the shell and can axially reciprocate relative to the shell, an independent first control cavity and an independent second control cavity are arranged between the cylinder barrel and the shell and are respectively positioned at two ends of the cylinder barrel, and the first control cavity and the second control cavity are both communicated with the T port; the cylinder barrel is provided with a first oil hole and a second oil hole which are distributed along the axial direction, and the first oil hole and the second oil hole are alternately communicated with the P port, the T port and the second control cavity; when the first oil hole is communicated with the P port, the second oil hole is communicated with the T port, and when the second oil hole is communicated with the P port, the first oil hole is communicated with the second control cavity;
the piston is positioned in the cylinder barrel and can perform axial reciprocating movement relative to the cylinder barrel; the piston divides the inside of the cylinder barrel into a first control chamber and a second control chamber along the axial direction, and the first control chamber and the second control chamber are respectively communicated with the first oil hole and the second oil hole;
the first plunger is positioned in the first working chamber, and the first liquid outlet are simultaneously communicated with the first working chamber;
the reversing assembly is arranged inside the cylinder barrel in a sliding mode and located at the left end of the cylinder barrel, and when moving leftwards, the reversing assembly can drive the cylinder barrel to move leftwards; the first spring is positioned in the first control cavity, one end of the first spring abuts against the shell, the other end of the first spring abuts against the cylinder barrel, and the cylinder barrel keeps a trend of moving rightwards;
when the piston moves to the right end position relative to the cylinder barrel, the pressure in the first control chamber rises, the pressure in the first control chamber pushes the reversing assembly to move leftwards, and then the cylinder barrel is driven to move leftwards relative to the shell, so that the second oil hole is communicated with the P port, the first oil hole is communicated with the second control cavity, and the oil return backpressure in the second control cavity keeps the cylinder barrel at the left end position; when the piston moves to the left end position relative to the cylinder barrel, the oil return back pressure in the second control cavity disappears, the first spring pushes the cylinder barrel to move rightwards relative to the shell, the first oil hole is communicated with the P port, the second oil hole is communicated with the first control cavity, and the cylinder barrel is kept at the right end position by the first spring.
Preferably, the housing is provided with a first oil path, a second oil path and a third oil path;
one end of the first oil way is communicated with the first control cavity, and the other end of the first oil way is communicated with the T port; one end of the second oil way is communicated with the second control cavity, and the other end of the second oil way is communicated with the T port; one end of the third oil path is communicated with the second control cavity, and the other end of the third oil path is selectively communicated with the first oil hole.
More preferably, an orifice is provided in the second oil passage.
Further preferably, the reversing assembly comprises a sleeve and a second spring, the sleeve is slidably disposed in the cylinder, one end of the second spring abuts against the housing, and the other end of the second spring abuts against the sleeve, so that the sleeve keeps moving towards the right.
Preferably, two end faces of the cylinder barrel are respectively provided with an annular groove, the annular grooves at two ends are respectively a part of the first control chamber and a part of the second control chamber, a left baffle ring is fixedly installed in the left annular groove, and when the sleeve moves leftwards, the cylinder barrel is driven to move leftwards through the left baffle ring; still fixed mounting has a left retaining ring in the casing, left retaining ring is used for right spacing left side sleeve carries out.
Further preferably, the piston is in a step structure, and the steps on two sides are respectively part of the first control chamber and the second control chamber.
Preferably, the shell is provided with a first connecting groove; the first connecting groove is located between the shell and the cylinder barrel, is an annular groove distributed along the axial direction, and is communicated with the port P.
Preferably, a second connecting groove is formed in the shell; the second connecting groove is located in an annular groove which is formed between the shell and the cylinder barrel and is distributed along the axial direction, one end of the second connecting groove is communicated with one end of the third oil way, and the other end of the second connecting groove is selectively communicated with the first oil hole; a third connecting groove is formed in the shell; the third connecting groove is located between the shell and the cylinder barrel and is an annular groove distributed along the axial direction, and the third connecting groove is communicated with the T-shaped opening.
Preferably, the underground grouting pump further comprises a second plunger, a second working chamber which is mutually independent from the control chamber and the first working chamber is further arranged in the shell, and a second liquid inlet and a second liquid outlet are further formed in the shell; the second piston is fixedly connected with the piston and moves synchronously; the second plunger is located in the second working chamber, and the second liquid inlet and the second liquid outlet are simultaneously communicated with the second working chamber.
Preferably, the shell adopts a split structure, and two ends of the shell are respectively provided with a detachable end cover.
Compared with the underground grouting pump with the existing structure, the underground grouting pump has the following beneficial technical effects:
1. in the invention, the shell is respectively provided with the P port connected with the oil inlet pipe and the T port connected with the oil outlet pipe, and the P port and the T port are alternately communicated with the control chambers on two sides of the piston, so that the piston is driven by high-pressure oil to axially reciprocate, and the first plunger and the second plunger are driven to reciprocate to perform compression work. Meanwhile, when the piston moves to the terminal position of the control chamber, the reversing assembly and the first spring are used for driving the cylinder to axially move relative to the shell, so that the switching of hydraulic acting force alternately applied to the two sides of the piston by high-pressure oil is achieved, the piston is driven to axially reciprocate and alternately move, and the purposes of automatically sucking liquid and discharging liquid by the first plunger and the second plunger are achieved. Therefore, the automatic reciprocating movement of the piston can be realized under the control of the hydraulic oil, and the reciprocating action condition which can be realized only by a reversing valve of the conventional grouting pump is changed.
2. In the invention, the oil way and the oil hole which are mutually related are arranged on the shell and the cylinder barrel, so that the alternative communication switching of the P port and the T port and the control chambers at two sides of the piston is completed in the relative axial movement process of the cylinder barrel relative to the shell. Like this, not only can save the use and the control requirement of current automatic switching-over in-process to the solenoid operated directional valve completely, reduce cost and control complexity, through set up the structure of a plurality of different functions on casing, cylinder and piston respectively moreover, improved the rate of utilization to spare part, reduced the volume of whole grouting pump, reduced spare part use amount to the high integration of whole grouting pump in the pit has been realized.
Drawings
FIG. 1 is a schematic structural diagram illustrating a process of moving a piston toward a second control chamber in the downhole grouting pump according to the embodiment;
FIG. 2 is a schematic view of the cross-sectional structure A-A of FIG. 1;
FIG. 3 is a schematic structural diagram illustrating a process of moving a piston toward a first control chamber in the downhole grouting pump according to the embodiment;
fig. 4 is a schematic view of the cross-sectional structure a-a in fig. 3.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments.
Referring to fig. 1, the downhole grouting pump of the present embodiment includes a housing 1, a cylinder 2, a piston 3, a first plunger 41, a second plunger 42, a reversing assembly, and a first spring 62. Wherein, along the axial direction, the first plunger 41 and the second plunger 42 are respectively located at both sides of the piston 3, and are fixedly connected with the piston 3.
The casing 1 is a hollow structure, and a control chamber, a first working chamber 9 and a second working chamber 10 which are independent from each other are arranged inside the casing 1, and the first working chamber 9 and the second working chamber 10 are respectively positioned at two sides of the control chamber. The shell 1 is provided with a port P, a port T, a first liquid inlet 11, a first liquid outlet 12, a second liquid inlet 13 and a second liquid outlet 14. Wherein, P mouth and advance oil pipe and be connected, T mouth is connected with an oil pipe respectively, installs corresponding imbibition check valve and play liquid check valve respectively in first inlet 11, first liquid outlet 12, second inlet 13 and second liquid outlet 14 to realize the corresponding one-way feed liquor of each liquid mouth and one-way flowing back function.
The first plunger 41 is connected to the housing 1 in a sliding manner and extends axially into the first working chamber 9. The end of the first plunger 41 performs the compression work of suction and discharge in the first working chamber 9 by the reciprocating axial movement of the piston 3. The second plunger 42 is slidably connected to the housing 1 and extends axially into the second working chamber 10. The end of the second plunger 42 performs the compression work of suction and discharge in the second working chamber 10 by the reciprocating axial movement of the piston 3.
The cylinder 2 is located inside the housing 1, and the outer surface of the cylinder 2 is in contact with the inner surface of the housing 1 and can perform reciprocating movement in the axial direction with respect to the housing 1. Be equipped with independent first control chamber 1a and second control chamber 1b between cylinder 2 and the casing 1 to be located the both ends of cylinder 2 respectively, first control chamber 1a and second control chamber 1b all are linked together with the T mouth. The cylinder tube 2 is provided with a first oil hole 21 and a second oil hole 22 distributed in the axial direction, and the first oil hole 21 and the second oil hole 22 are alternately communicated with the port P, the port T and the second control chamber 1 b. When the first oil hole 21 communicates with the port P, the second oil hole 22 communicates with the port T; when the second oil hole 22 communicates with the port P, the first oil hole 21 communicates with the second control chamber 1 b.
The piston 3 is located inside the cylinder 2 and can axially reciprocate relative to the cylinder 2. The piston 3 divides the inside of the cylinder tube 2 into a first control chamber 23 and a second control chamber 24 in the axial direction, and the first control chamber 23 and the second control chamber 24 are held in communication with the first oil holes 21 and the second oil holes 22, respectively.
The reversing assembly is arranged inside the cylinder barrel 2 in a sliding mode and located at the left end of the cylinder barrel 2, and when the reversing assembly moves leftwards, the cylinder barrel 2 can be driven to move leftwards. The first spring 62 is located in the first control chamber 1a, one end of the first spring 62 abuts against the housing 1, and the other end abuts against the cylinder 2, so that the cylinder 2 keeps the trend of moving rightward.
When the port P is communicated with the first oil hole 21, high-pressure oil in the oil inlet pipe is guided to the first control chamber 23, meanwhile, the second oil hole 22 is communicated with the port T, and oil in the second control chamber 24 is guided to the oil outlet pipe, so that the piston 3 moves towards the direction of the second control chamber 24 under the action of the high-pressure oil in the first control chamber 23, and liquid suction of the first working chamber 9 and liquid drainage of the second working chamber 10 are realized. When the piston 3 moves to the terminal position of the second control chamber 24, the pressure in the first control chamber 23 rises, the pressure in the first control chamber 23 pushes the reversing assembly to move leftward, and then the cylinder barrel 2 is driven to move leftward relative to the housing 1, so that the second oil hole 22 is communicated with the port P and the first oil hole 21 is communicated with the second control chamber 1b, the oil return back pressure in the second control chamber 1b keeps the cylinder barrel 2 at the left end position, and the piston 3 starts to be driven reversely to move towards the first control chamber 23.
When the port P is communicated with the second oil hole 22, high-pressure oil in the oil inlet pipe is guided to the second control chamber 24, meanwhile, the first oil hole 21 is communicated with the second control chamber 1b, and oil in the first control chamber 23 is guided to the oil outlet pipe through the second control chamber 1b, so that the piston 3 moves towards the direction of the first control chamber 23 under the action of the high-pressure oil in the second control chamber 24, and liquid absorption of the second working chamber 10 and liquid drainage of the first working chamber 9 are realized. When the piston 3 moves to the end position of the first control chamber 23, the return oil back pressure in the second control chamber 1b disappears, the first spring 62 pushes the cylinder 2 to move rightward relative to the housing 1, the first oil hole 21 is communicated with the port P and the second oil hole 22 is communicated with the port T, the first spring 62 keeps the cylinder 2 at the right end position, and the piston 3 starts to be driven reversely to move toward the second control chamber 24.
As shown in fig. 1, in the present embodiment, the casing 1 is provided with a first oil passage 104, a second oil passage 105, and a third oil passage 106, one end of the first oil passage 104 is communicated with the first control chamber 1a, and the other end is communicated with the T port; one end of the second oil passage 105 communicates with the second control chamber 1b and the other end communicates with the T port, and one end of the third oil passage 106 communicates with the second control chamber 1b and the other end selectively communicates with the first oil hole 21.
As shown in fig. 1, the second oil passage 105 is provided with an orifice 81. At this time, by virtue of the throttling effect of the throttle hole 81 on the passing oil, namely, the throttling effect on the oil flowing between the second oil passage 105 and the first control chamber 23, the acting force generated by the return oil back pressure in the second control chamber 1b on the cylinder 2 in the direction of the first control chamber 1a can be kept, the cylinder 2 is fixed at the terminal position of the first control chamber 1a, and the stable connection of the second oil hole 22 and the port P and the stable connection of the first oil hole 21 and the port T are ensured in the process that the piston 3 moves towards the first control chamber 23.
Preferably, as shown in fig. 1, in the present embodiment, the reversing assembly includes a sleeve 51 and a second spring 61, the sleeve 51 is slidably disposed in the cylinder 2, one end of the second spring 61 abuts against the housing 1, and the other end abuts against the sleeve 51, so that the sleeve 51 keeps a rightward trend.
Referring to fig. 1, in this embodiment, two end surfaces of the cylinder barrel 2 are respectively provided with an annular groove, the annular grooves at two ends are respectively a part of the first control chamber 1a and a part of the second control chamber 1b, a left baffle ring 7 is fixedly installed in the annular groove at the left end, and when the sleeve 51 moves leftward, the cylinder barrel 2 is driven to move leftward by the left baffle ring 7; still fixed mounting has left retaining ring 8 in the casing 1, left retaining ring 8 is used for right spacing left side sleeve 51 carries out.
As shown in fig. 1, in the present embodiment, the piston 3 has a stepped structure, and the steps on both sides are part of the first control chamber 23 and the second control chamber 24, respectively. Therefore, when the piston moves to the terminal position along the axial direction, the first control chamber and the second control chamber can be continuously kept between the piston and the shell by virtue of the steps on the two sides of the piston, so that high-pressure oil is quickly introduced, acting force for driving the piston in the opposite direction is quickly established, the reaction speed of the piston moving in the opposite direction along the axial direction is increased, and the reversing speed of the reciprocating motion of the hydraulic cylinder is increased.
As shown in fig. 1, the housing 1 is further provided with a first connecting groove 101. The first connecting groove 101 is in the form of an annular groove structure arranged along the axial direction and is communicated with the port P. Like this, carry out the axial displacement in-process at the cylinder, even if take place circumferencial direction's rotation, also can guarantee the accurate quick intercommunication of P mouth and first oilhole or second oilhole to guarantee this grouting pump working process's in the pit reliable and stable nature.
As shown in fig. 1, a second connection groove 102 and a third connection groove 103 are also provided on the housing 1, respectively. The second connecting groove 102 and the third connecting groove 103 both adopt an annular groove structure form and are located between the housing 1 and the cylinder 2, wherein one end of the second connecting groove 102 is communicated with one end of the third oil path 106, the other end of the second connecting groove 102 is selectively communicated with the first oil hole 21, and the third connecting groove 103 is communicated with the T port. Therefore, in the process of axial movement of the piston, even if the piston rotates in the circumferential direction, accurate and quick communication between the second control cavity 1b and the first oil hole 21 and accurate and quick communication between the T port and the second oil hole 22 can be guaranteed, and the stability and reliability of the working process of the underground grouting pump are guaranteed.
In the embodiment, the first working chamber and the second working chamber are respectively arranged on two sides of the control chamber, and end parts of the first plunger and the second plunger respectively extend into the first working chamber and the second working chamber, so that the alternating compression work of the first plunger and the second plunger on the liquid in the first working chamber and the second working chamber in the reciprocating movement process of the piston is realized, and the compression work efficiency on the liquid is improved. However, in other embodiments, the downhole grouting pump can be designed to have only one working chamber completely according to different working conditions, that is, only one plunger is reserved to compress oil in the corresponding working chamber to do work, so that the length of the whole shell can be properly reduced, the volume of the whole grouting pump is reduced, and a structural form of unidirectional liquid compression work is formed. Even, the first working chamber and the second working chamber can be sequentially arranged on the same side of the control chamber, the plunger is designed into a step-shaped structure and sequentially passes through the first working chamber and the second working chamber, so that a one-way compressed liquid working form is formed, and the one-way liquid compression working efficiency is improved.
In addition, as shown in fig. 1, in the present embodiment, the housing 1 is a split structure, and both ends of the housing are respectively in the form of end covers connected by axial bolts. Therefore, the whole shell is convenient to process and manufacture, particularly relevant oil ways, so that the processing difficulty and cost are reduced, the disassembly is convenient, and the assembly efficiency and the maintenance convenience are improved.
Combine fig. 1 to fig. 4 to show, the time of the downhole grouting pump of this embodiment working, the P mouth with advance oil pipe and be connected, the T mouth is connected with an oil pipe, concrete working process as follows:
when the piston 3 moves towards the second control chamber 24 to drain the liquid in the second working chamber 10 and suck the liquid in the first working chamber 9, high-pressure oil in the oil inlet pipe sequentially flows into the first control chamber 23 through the P port, the first connecting groove 101 and the first oil hole 21, and simultaneously oil in the second control chamber 24 sequentially flows into the oil outlet pipe through the second oil hole 22, the third connecting groove 103 and the T port, so that the piston 3 moves towards the second control chamber 24 under the action of pressure difference of the oil on two sides of the first control chamber 23 and the second control chamber 24, and liquid drainage of the second working chamber 10 and liquid suction of the first working chamber 9 are realized.
In the above process, since no oil flows in the first control chamber 1a and the second control chamber 1b, the pressure is equal to the pressure at the T-port, so that the cylinder 2 is fixed at the terminal position of the second control chamber 1b under the action of the first spring 62, the stable communication state between the first connecting groove 101 and the first oil hole 21 and the stable communication state between the second oil hole 22 and the third connecting groove 103 are maintained, and the stable reliability of the movement of the piston 3 toward the second control chamber 24 is ensured.
When the piston 3 moves to the terminal position of the second control chamber 24, the pressure in the first control chamber 23 rises rapidly, the pressure in the first control chamber 23 acts on the sleeve 51 to overcome the acting force of the second spring 61, the sleeve 51 is pushed to move leftwards, and the cylinder barrel 2 is driven to move leftwards through the left baffle ring 7, so that the high-pressure oil in the oil inlet pipe flows to the second control chamber 24 through the port P, the first connecting groove 101 and the second oil hole 22 in sequence, meanwhile, the oil in the first control chamber 23 flows to the oil outlet pipe through the first oil hole 21, the second connecting groove 102, the third oil path 106, the second control chamber 1b and the second oil path 105 in sequence, because of the back pressure oil return in the second control chamber 1b, the cylinder barrel 2 moves relative to the housing 1 in the direction of the first control chamber 1a under the action of the pressure difference of the oil on the two sides of the second control chamber 1b and the first control chamber 1a, the P port is switched to communicate with the second oil hole 22, and the first oil hole 21 is switched to communicate with the second connecting groove 102, so that the reversing operation of the piston 3 is realized.
When the piston 3 moves towards the first control chamber 23 to drain the liquid in the first working chamber 9 and suck the liquid in the second working chamber 10, the high-pressure oil in the oil inlet pipe sequentially flows into the second control chamber 24 through the port P, the first connecting groove 101 and the second oil hole 22, and simultaneously the oil in the first control chamber 23 sequentially flows into the oil outlet pipe through the first oil hole 21, the second connecting groove 102, the third oil path 106, the second control cavity 1b and the second oil path 105, so that the piston 3 moves towards the first control chamber 23 under the action of the pressure difference of the oil on two sides of the first control chamber 23 and the second control chamber 24, and the liquid drainage of the first working chamber 9 and the liquid suction of the second working chamber 10 are realized.
In the above process, the oil in the second control chamber 1b flows into the T port through the orifice 81 in the second oil passage 105, so that a back pressure exists in the second control chamber 1b, and at this time, since no oil flows in the first control chamber 1a, the pressure is equal to the pressure of the T port, so that the cylinder 2 is fixed at the terminal position of the first control chamber 1a under the action of the pressure difference between the oil at the two sides of the second control chamber 1b and the first control chamber 1a, the stable communication state between the first connecting groove 101 and the second oil hole 22 and the stable communication state between the first oil hole 21 and the second connecting groove 102 are maintained, and the stable reliability of the movement of the piston 3 toward the first control chamber 23 is ensured.
When the piston 3 moves to the terminal position of the first control chamber 23, the back pressure in the second control chamber 1b disappears, the pressure in the first control chamber 1a and the pressure in the second control chamber 1b are both equal to the pressure in the T port, the first spring 62 pushes the cylinder 2 to move rightwards, so that high-pressure oil in the oil inlet pipe flows to the first control chamber 23 sequentially through the P port, the first connecting groove 101 and the first oil hole 21, and simultaneously oil in the second control chamber 24 flows to the oil outlet pipe sequentially through the second oil hole 22, the third connecting groove 103 and the T port, thereby realizing the operation of reversing the piston 3 again.
The reciprocating action is repeated in sequence, and the work of reciprocating liquid suction and liquid discharge of the underground grouting pump under the hydraulic drive is realized.
Claims (10)
1. The underground grouting pump is characterized by comprising a shell, a cylinder barrel, a piston, a first plunger, a reversing assembly and a first spring; the first plunger and the piston are fixedly connected and move synchronously;
the device comprises a shell, a control chamber, a first working chamber, a first liquid inlet, a first liquid outlet, a second working chamber, a second liquid inlet, a second liquid outlet, a third working chamber, a fourth working chamber, a fifth working chamber and a sixth working chamber, wherein the control chamber and the first working chamber are mutually independent;
the cylinder barrel is positioned in the shell and can axially reciprocate relative to the shell, an independent first control cavity and an independent second control cavity are arranged between the cylinder barrel and the shell and are respectively positioned at two ends of the cylinder barrel, and the first control cavity and the second control cavity are both communicated with the T port; the cylinder barrel is provided with a first oil hole and a second oil hole which are distributed along the axial direction, and the first oil hole and the second oil hole are alternately communicated with the P port, the T port and the second control cavity; when the first oil hole is communicated with the P port, the second oil hole is communicated with the T port, and when the second oil hole is communicated with the P port, the first oil hole is communicated with the second control cavity;
the piston is positioned in the cylinder barrel and can perform axial reciprocating movement relative to the cylinder barrel; the piston divides the inside of the cylinder barrel into a first control chamber and a second control chamber along the axial direction, and the first control chamber and the second control chamber are respectively communicated with the first oil hole and the second oil hole;
the first plunger is positioned in the first working chamber, and the first liquid outlet are simultaneously communicated with the first working chamber;
the reversing assembly is arranged inside the cylinder barrel in a sliding mode and located at the left end of the cylinder barrel, and when moving leftwards, the reversing assembly can drive the cylinder barrel to move leftwards; the first spring is positioned in the first control cavity, one end of the first spring abuts against the shell, the other end of the first spring abuts against the cylinder barrel, and the cylinder barrel keeps a trend of moving rightwards;
when the piston moves to the right end position relative to the cylinder barrel, the pressure in the first control chamber rises, the pressure in the first control chamber pushes the reversing assembly to move leftwards, and then the cylinder barrel is driven to move leftwards relative to the shell, so that the second oil hole is communicated with the P port, the first oil hole is communicated with the second control cavity, and the oil return backpressure in the second control cavity keeps the cylinder barrel at the left end position; when the piston moves to the left end position relative to the cylinder barrel, the oil return back pressure in the second control cavity disappears, the first spring pushes the cylinder barrel to move rightwards relative to the shell, the first oil hole is communicated with the P port, the second oil hole is communicated with the first control cavity, and the cylinder barrel is kept at the right end position by the first spring.
2. The downhole mud injection pump of claim 1, wherein the housing defines a first oil passage, a second oil passage, and a third oil passage;
one end of the first oil way is communicated with the first control cavity, and the other end of the first oil way is communicated with the T port; one end of the second oil way is communicated with the second control cavity, and the other end of the second oil way is communicated with the T port; one end of the third oil path is communicated with the second control cavity, and the other end of the third oil path is selectively communicated with the first oil hole.
3. The downhole mud injection pump of claim 2, wherein the second oil passage is provided with an orifice.
4. The downhole mud pump of claim 2, wherein the reversing assembly comprises a sleeve slidably disposed within the bore and a second spring having one end bearing against the housing and the other end bearing against the sleeve to maintain the sleeve in a rightward tendency.
5. The downhole grouting pump according to claim 4, wherein two annular grooves are respectively formed in two end faces of the cylinder barrel, the annular grooves at two ends are respectively part of the first control chamber and the second control chamber, a left baffle ring is fixedly installed in the left annular groove, and when the sleeve moves leftwards, the cylinder barrel is driven to move leftwards by the left baffle ring; still fixed mounting has a left retaining ring in the casing, left retaining ring is used for right spacing left side sleeve carries out.
6. The downhole mud injection pump of claim 2, wherein the piston is in the form of a stepped structure, and the steps on either side are part of the first and second control chambers, respectively.
7. The downhole grouting pump of any one of claims 1-6, wherein the housing is provided with a first connecting groove; the first connecting groove is located between the shell and the cylinder barrel, is an annular groove distributed along the axial direction, and is communicated with the port P.
8. The downhole mud injection pump of any one of claims 1-6, wherein the housing has a second attachment slot; the second connecting groove is located in an annular groove which is formed between the shell and the cylinder barrel and is distributed along the axial direction, one end of the second connecting groove is communicated with one end of the third oil way, and the other end of the second connecting groove is selectively communicated with the first oil hole; a third connecting groove is formed in the shell; the third connecting groove is located between the shell and the cylinder barrel and is an annular groove distributed along the axial direction, and the third connecting groove is communicated with the T-shaped opening.
9. The downhole grouting pump according to any one of claims 1-6, further comprising a second plunger, wherein a second working chamber independent from the control chamber and the first working chamber is further provided inside the housing, and a second liquid inlet and a second liquid outlet are further provided on the housing; the second piston is fixedly connected with the piston and moves synchronously; the second plunger is located in the second working chamber, and the second liquid inlet and the second liquid outlet are simultaneously communicated with the second working chamber.
10. The downhole grouting pump of any one of claims 1-6, wherein the casing is of a split structure, and the two ends are respectively provided with a detachable end cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010079461.8A CN111287923A (en) | 2020-02-04 | 2020-02-04 | Underground grouting pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010079461.8A CN111287923A (en) | 2020-02-04 | 2020-02-04 | Underground grouting pump |
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| Publication Number | Publication Date |
|---|---|
| CN111287923A true CN111287923A (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010079461.8A Pending CN111287923A (en) | 2020-02-04 | 2020-02-04 | Underground grouting pump |
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| CN (1) | CN111287923A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114166409A (en) * | 2021-11-15 | 2022-03-11 | 北京建筑大学 | Grouting sleeve grouting pressure detection plug, grouting equipment and grouting method |
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Application publication date: 20200616 |