CN111075680A - Grouting pump for underground coal mine - Google Patents
Grouting pump for underground coal mine Download PDFInfo
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- CN111075680A CN111075680A CN201911398413.9A CN201911398413A CN111075680A CN 111075680 A CN111075680 A CN 111075680A CN 201911398413 A CN201911398413 A CN 201911398413A CN 111075680 A CN111075680 A CN 111075680A
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- 239000003245 coal Substances 0.000 title claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 238000004891 communication Methods 0.000 claims description 22
- 239000002002 slurry Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 238000013016 damping Methods 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims 6
- 239000007924 injection Substances 0.000 claims 6
- 238000007789 sealing Methods 0.000 abstract description 5
- 238000005553 drilling Methods 0.000 abstract description 3
- 230000010354 integration Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000004323 axial length Effects 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
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 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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Classifications
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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
- 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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- 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
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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
- 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
- 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
- F04B53/14—Pistons, piston-rods or piston-rod connections
Landscapes
- 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 a coal mine underground drilling hole sealing grouting pump. The invention discloses a grouting pump for a coal mine underground, which comprises a shell, a main piston and a main shaft, wherein a control chamber and a first working chamber which are mutually independent are arranged in the shell, the main piston is positioned in the control chamber, the main shaft is positioned in the shell and axially penetrates through the main piston, the main piston can drive the main shaft to axially and synchronously move, and when the main piston moves to the terminal position of the control chamber, the main shaft can axially move relative to the main piston and rotate relative to the main piston along the circumferential direction, so that two sides of the main piston are respectively and alternately communicated with high-pressure oil. The grouting pump can suck and discharge liquid 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, can work for a long time and has long service life.
Description
Technical Field
The invention belongs to the technical field of a coal mine underground drilling hole sealing grouting pump, and particularly relates to a hydraulically-driven coal mine underground grouting pump.
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 grouting pump with the conventional structure at present, the invention provides a grouting pump for a coal mine underground with a brand-new structure. The grouting pump for the underground coal mine comprises a shell, a main piston and a main shaft;
the shell is internally provided with a control chamber and a first working chamber which are mutually independent, and the shell is provided with a P port, a T port, a first liquid inlet hole and a first liquid outlet hole;
the main piston is positioned in the control chamber and divides the control chamber into a first control chamber and a second control chamber which are independent of each other; the P port and the T port are respectively communicated with the first control chamber and the second control chamber in an alternating mode, when the P port is communicated with the first control chamber, the T port is communicated with the second control chamber, and when the P port is communicated with the second control chamber, the T port is communicated with the first control chamber;
the main shaft is positioned in the shell and axially penetrates through the main piston, the main piston can drive the main shaft to axially and synchronously move, and meanwhile, the main shaft can axially move relative to the main piston and rotate in the circumferential direction relative to the main piston in the relative axial movement process; two ends of the main shaft are connected with the shell in a sliding mode along the axial direction, and the left end of the main shaft is located in the first working chamber; when the main piston drives the main shaft to axially move to a terminal position in the control chamber, the main shaft axially moves relative to the main piston and rotates in the circumferential direction relative to the main piston to complete the communication relation switching of the P port and the T port with the first control chamber and the second control chamber.
Preferably, the main piston is provided with a first oil path, a second oil path, a third oil path and a fourth oil path, the main shaft is provided with a first through flow groove and a second through flow groove which are formed along the axial direction, the main shaft is also provided with a spiral groove, the main piston is provided with a convex column which extends into the spiral groove, and when the main shaft moves axially relative to the main piston, the main shaft is driven to rotate along the circumferential direction through the matching of the convex column and the spiral groove;
one end of the first oil passage is communicated with the first control chamber; one end of the second oil passage is communicated with the second control chamber; one end of the third oil path is communicated with the port P, and the other end of the third oil path is selectively communicated with the first through flow groove and the second through flow groove; one end of the fourth oil path is communicated with the T port, and the other end of the fourth oil path is selectively communicated with the first through flow groove and the second through flow groove;
when the main shaft moves along with the main piston towards the direction of the first control chamber, the first oil path is communicated with the fourth oil path through a first through flow groove, and the second oil path is communicated with the third oil path through a second through flow groove; when the main shaft moves along with the main piston towards the direction of the second control chamber, the first oil path is communicated with the third oil path through the first through flow groove, and the second oil path is communicated with the fourth oil path through the second through flow groove;
when the main shaft moves relative to the main piston in the direction of the first control chamber, the first oil path is switched to be communicated with the third oil path through the first through flow groove, and the second oil path is switched to be communicated with the fourth oil path through the second through flow groove; when the main shaft moves relative to the main piston in the direction of the second control chamber, the second oil path is switched to the second through-flow groove to be communicated with the third oil path, and the first oil path is switched to be communicated with the fourth oil path through the first through-flow groove.
Preferably, the outer surface of the main piston is provided with a first oil groove and a second oil groove which are axially formed, the first oil groove and the second oil groove are symmetrically distributed along the circumferential direction, the first oil groove is communicated with the third oil path and the port P, and the second oil groove is communicated with the fourth oil path and the port T.
Preferably, the housing is provided with a first auxiliary oil path, a second auxiliary oil path, a third auxiliary oil path and a fourth auxiliary oil path, the main shaft is provided with a first communicating groove and a second communicating groove, a first control cavity and a second control cavity are respectively formed at two ends of the main shaft and the main piston, a first communicating oil path for communicating the first communicating groove and the second control cavity and a second communicating oil path for communicating the second communicating groove and the first control cavity are arranged in the main shaft, and the main shaft is provided with a first damping hole for communicating the first control chamber and the first communicating oil path and a second damping hole for communicating the second control chamber and the second communicating oil path;
one end of the first auxiliary oil way is communicated with the port P, and the other end of the first auxiliary oil way is selectively communicated with the first connecting groove; one end of the second auxiliary oil way is communicated with the port P, and the other end of the second auxiliary oil way is selectively communicated with the second communication groove; one end of the third auxiliary oil way is communicated with the T port, one end of the third auxiliary oil way is communicated with the first reversing chamber, and the other end of the third auxiliary oil way is selectively communicated with the first connecting groove; one end of the fourth auxiliary oil way is communicated with the T port, and the other end of the fourth auxiliary oil way is selectively communicated with the second communication groove;
in the process that the main shaft moves along with the main piston, the first auxiliary oil path and the third auxiliary oil path are kept disconnected from the first communicating groove, and the second auxiliary oil path and the fourth auxiliary oil path are kept disconnected from the second communicating groove; when the main shaft moves to the terminal of the first control chamber along with the main piston and the first auxiliary oil way is communicated with the first communicating groove, the fourth auxiliary oil way is communicated with the second communicating groove; and when the main piston moves to the terminal position of the second control chamber and the second auxiliary oil way is communicated with the second communicating groove, the third auxiliary oil way is communicated with the first communicating groove.
Further preferably, the first communicating groove and the second communicating groove are annular grooves along the circumferential direction.
Preferably, the underground grouting pump for the coal mine is also provided with a rotation stopping rod; the rotation stopping rod penetrates through the main piston along the axial direction and then is fixed in the shell.
Preferably, a second working chamber which is independent from the control chamber and the first working chamber is further arranged in the shell, and a second liquid inlet hole and a second liquid outlet hole which are communicated with the second working chamber are further formed in the shell; the right end of the main shaft is located in the second working chamber.
Preferably, the shell adopts a split structure, a partition plate is arranged inside the shell, and the inside of the shell is divided into a control chamber and a first working chamber which are distributed along the axial direction.
Compared with the grouting pump with the existing structure, the grouting pump has the following beneficial technical effects:
1. in the invention, the shell is respectively provided with a P port connected with the hydraulic pump and a T port connected with the oil return tank, and the P port and the T port are alternately communicated with the control chambers at two sides of the main piston, so that the main piston is driven to axially reciprocate by means of hydraulic pressure, and the left end and the right end of the main shaft are driven to respectively perform repeated liquid suction and liquid discharge work in the first working chamber and the second working chamber. Meanwhile, the high-pressure oil at the position of the P port axially moves the main shaft moving to the terminal position of the control chamber relative to the main piston, and the high-pressure oil alternately applies hydraulic acting force to the two sides of the main piston in a switching manner relative to the rotation of the main piston, so that the main piston is driven to axially reciprocate and alternately move. Therefore, the liquid suction and discharge are alternately realized by taking the hydraulic pressure as power to drive the left end and the right end of the main shaft, the structure is simplified, and the compactness of the volume is improved.
2. In the invention, a plurality of oil ways and a plurality of annular grooves which are mutually associated are respectively arranged on the main piston and the main shaft, so that the switching of the alternative communication of the P port and the T port with the control chambers at the two sides of the main piston is completed in the relative movement process between the main shaft and the main piston. Furthermore, the shell and the main shaft are respectively provided with the auxiliary oil way and the communicating groove which are mutually associated, so that the main shaft is driven to axially move relative to the main piston by high-pressure oil at the position of the P port, and the rotation of the main shaft is realized. Like this, not only saved the use and the control requirement to the change valve in current hydraulic drive's grouting pump, reduced cost and control complexity, through set up a plurality of different functional structure respectively on casing, main shaft and main piston moreover to improved the rate of utilization to spare part, reduced the volume of whole grouting pump, reduced spare part use amount, realized the high integration of whole grouting pump.
Drawings
Fig. 1 is a schematic structural diagram of a main piston of a grouting pump for underground coal mine according to the embodiment of the invention moving to a terminal in a direction of a second working chamber;
fig. 2 is a schematic structural diagram of the grouting pump for the underground coal mine according to the embodiment, in which the main piston is located at the terminal of the second control chamber and the main shaft moves in the direction of the second working chamber relative to the main piston;
fig. 3 is a schematic structural diagram of the grouting pump for underground coal mine according to the embodiment when the main piston moves to the terminal in the direction of the first working chamber;
fig. 4 is a schematic structural diagram of the grouting pump for the underground coal mine according to the embodiment, in which the main piston is located at the terminal of the first control chamber and the main shaft moves toward the first working chamber relative to the main piston;
FIG. 5 is a schematic cross-sectional view taken along the line A-A in FIG. 4;
fig. 6 is a schematic three-dimensional structure diagram of the spindle in the present embodiment.
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 grouting pump for the underground coal mine of the embodiment includes a housing 1, a main piston, and a main shaft 5.
The shell 1 is of a hollow structure, a control room, a first working room 12 and a second working room 13 which are mutually independent are arranged in the shell 1, the first working room 12 and the second working room 13 are respectively positioned at two sides of the control room, and a P port, a T port, a first liquid inlet hole 14, a first liquid outlet hole 15, a second liquid inlet hole 16 and a second liquid outlet hole 17 are arranged on the shell 1. Corresponding liquid passing one-way valves are respectively arranged in the first liquid inlet hole 14, the first liquid discharging hole 15, the second liquid inlet hole 16 and the second liquid discharging hole 17, so that corresponding one-way liquid inlet and one-way liquid discharging functions of all the holes are achieved.
The master piston 2 is located in the control chamber and divides the control chamber into a first control chamber 111 and a second control chamber 112, which are independent of each other. Wherein the P port and the T port are alternately communicated with the first control chamber 111 and the second control chamber 112, respectively. When the port P communicates with the first control chamber 111, the port T communicates with the second control chamber 112, and the high-pressure oil enters the first control chamber 111 to drive the main piston 2 to move axially in the direction of the second control chamber 112. When the port P communicates with the second control chamber 112, the port T communicates with the first control chamber 111, and the high-pressure oil enters the second control chamber 112 to drive the main piston 2 to move axially in the direction of the first control chamber 111. The main shaft 5 is located inside the housing 1 and axially penetrates through the main piston 2, two ends of the main shaft 5 are axially and slidably connected with the housing 1, the left end of the main shaft 5 is located in the first working chamber 12, and the right end of the main shaft 5 is located in the second working chamber 13. The main piston 2 can drive the main shaft 5 to axially move synchronously, and the main shaft 5 can axially slide relative to the main piston 2 and rotate in the circumferential direction relative to the main piston 2 in the relative axial movement process. When the main piston 2 carries the main shaft 5 to axially move to the terminal position of the first control chamber 111 or the second control chamber 112 under the driving action of the high-pressure oil introduced from the port P, the main shaft 5 continues to axially move relative to the main piston 2 and rotates in the circumferential direction relative to the main piston to complete the switching of the communication relationship between the port P and the port T and the first control chamber 111 and the second control chamber 112, so that the main piston 2 carries the main shaft 5 to axially move in the opposite direction under the driving action of the high-pressure oil introduced from the port P again after the switching.
Referring to fig. 1, in the present embodiment, the main shaft 5 is designed in a stepped shaft structure, and a positioning plug 6 is respectively disposed at both ends of the main piston 2. The stage on the main shaft 5 is in sliding contact with the main piston 2, and the axial distance between the two positioning plugs 6 is greater than the axial length of the stage on the main shaft 5. Therefore, the main piston can carry the main shaft to axially move together by virtue of the axial positioning of the positioning plugs on the step sections of the main shaft, and the axial movement of the main shaft relative to the main piston can be realized by virtue of the axial distance between the two positioning plugs and the axial size difference of the stage.
Referring to fig. 1 and 4, in the present embodiment, a first oil path 21, a second oil path 22, a third oil path 23, and a fourth oil path 24 are provided on the main piston 2, a first through groove and a second through groove 51 and 52 are provided on the main shaft 5 along the axial direction, a spiral groove 59 is further provided on the main shaft 5, a convex column 20 extending into the spiral groove 59 is provided on the main piston 2, and when the main shaft 5 moves axially relative to the main piston 2, the main shaft 5 is driven to rotate in the circumferential direction by the cooperation of the convex column 20 and the spiral groove 59.
One end of the first oil passage 21 is communicated with the first control chamber 111; one end of the second oil passage 22 is in communication with the second control chamber 112; one end of the third oil passage 23 is communicated with the port P, and the other end is selectively communicated with the first through-flow groove 51 and the second through-flow groove 52; one end of the fourth oil passage 24 is in communication with the T port, and the other end is selectively in communication with the first communicating groove 51 and the second communicating groove 52.
As shown in fig. 5, when the main shaft 5 moves in the direction of the first control chamber 111 with the master piston 2, the first oil passage 21 is communicated with the fourth oil passage 24 through the first through-flow groove 51, and the second oil passage 22 is communicated with the third oil passage 23 through the second through-flow groove 52. As shown in fig. 1, when the main shaft 5 moves in the direction of the second control chamber 112 with the master piston 2, the first oil passage 21 is communicated with the third oil passage 23 through the first flow passage 51, and the second oil passage 22 is communicated with the fourth oil passage 24 through the second flow passage 52.
As shown in fig. 6, when the main shaft 5 moves in the direction of the first control chamber 111 with respect to the main piston 2, the first oil passage 21 is switched to be communicated with the third oil passage 23 through the first flow passage 51, and the second oil passage 22 is switched to be communicated with the fourth oil passage 24 through the second flow passage 52. As shown in fig. 2, when the main shaft 5 moves in the direction of the second control chamber 112 with respect to the main piston 2, the second oil passage 22 is switched to communicate with the third oil passage 23 through the second flow passage 52, and the first oil passage 21 is switched to communicate with the fourth oil passage 24 through the first flow passage 51.
Preferably, as shown in fig. 1, the outer surface of the main piston 2 is provided with a first oil groove 25 and a second oil groove 26 which are axially opened, and the first oil groove 25 and the second oil groove 26 are symmetrically distributed along the circumferential direction, the first oil groove 25 is communicated with the third oil path 23 and the port P, and the second oil groove 26 is communicated with the fourth oil path 24 and the port T.
As shown in fig. 1, in this embodiment, a first auxiliary oil path 181, a second auxiliary oil path 182, a third auxiliary oil path 183, and a fourth auxiliary oil path 184 are provided on the casing 1, a first communicating groove 53 and a second communicating groove 54 are provided on the main shaft 5, a first control chamber 2a and a second control chamber 2b are respectively formed at two ends of the main shaft 5 and the main piston 2, a first communicating oil path 55 for communicating the first communicating groove 53 and the second control chamber 2b and a second communicating oil path 56 for communicating the second communicating groove 54 and the first control chamber 2a are provided in the main shaft 5, and a first damping hole 57 for communicating the first control chamber 111 and the first communicating oil path 55 and a second damping hole 58 for communicating the second control chamber 112 and the second communicating oil path 56 are provided on the main shaft 5.
One end of the first auxiliary oil path 181 is in communication with the port P, and the other end is selectively in communication with the first communicating groove 53. One end of the second auxiliary oil passage 182 is in communication with the port P, and the other end is selectively in communication with the second communication groove 54. One end of the third auxiliary oil path 183 is communicated with the T port, and the other end is selectively communicated with the first communicating groove 53. One end of the fourth auxiliary oil passage 184 communicates with the T port, and the other end selectively communicates with the second communication groove 54.
During the axial movement of the main shaft 5 with the main piston 2, the first auxiliary oil passage 181 and the third auxiliary oil passage 183 are kept in a disconnected state from the first communicating groove 53, and the second auxiliary oil passage 182 and the fourth auxiliary oil passage 184 are kept in a disconnected state from the second communicating groove 54.
When the main shaft 5 moves with the main piston 2 to the end of the first control chamber 111, the first auxiliary oil passage 181 communicates with the first communicating groove 53, and the fourth auxiliary oil passage 184 communicates with the second communicating groove 54. At this time, the high-pressure oil at the P port enters the second control chamber 2b through the first auxiliary oil passage 181, the first communicating groove 53, and the first communicating oil passage 55 to act on the main shaft 5, thereby pushing the main shaft 5 to move toward the first working chamber 12 relative to the main piston 2, and the oil in the first control chamber 2a returns to the T port through the second communicating oil passage 56, the second communicating groove 54, and the fourth auxiliary oil passage 184.
When the main shaft 5 moves to the end of the second control chamber 112 with the main piston 2 and the second auxiliary oil passage 182 communicates with the second communication groove 54, the third auxiliary oil passage 183 communicates with the first communication groove 53. At this time, the high-pressure oil at the P port enters the first control chamber 2a through the second auxiliary oil passage 182, the second communicating groove 54, and the second communicating oil passage 56 to act on the main shaft 5, and further pushes the main shaft 5 to move toward the second working chamber 13 relative to the main piston 2, and the oil in the second control chamber 2b returns to the T port through the first communicating oil passage 55, the first communicating groove 53, and the third auxiliary oil passage 183.
Preferably, in the present embodiment, the main shaft 5 has a cylindrical structure, and the first communicating groove 53 and the second communicating groove 54 are annular grooves opened in the circumferential direction.
In this embodiment, as shown in fig. 3, the grouting pump is further provided with a rotation stopping rod 7; the rotation stopping rod 7 penetrates through the main piston 3 along the axial direction and then is fixed in the shell 1, and the rotation stopping rod 8 is arranged to prevent the main piston 2 from rotating, so that the main shaft 5 can be driven to rotate along the circumferential direction relative to the main piston 2 when the main shaft 5 moves relative to the main piston 2 along the axial direction.
In addition, as shown in fig. 1, in the present embodiment, the housing 1 is of a split structure, and is composed of three parts of housings corresponding to the control chamber, the first air chamber 12 and the second air chamber 13, and the left partition plate 3 and the right partition plate 4 are axially and fixedly connected by 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.
Referring to fig. 1 to 6, when the grouting pump of this embodiment is operated, the P port is connected to the hydraulic pump, and the T port is connected to the oil return tank, specifically, the operation process is as follows:
when the main piston 2 moves towards the direction of the second working chamber 13, the convex column 20 is located at the rightmost end position of the spiral groove 59, and the positioning plug 6 on the left side of the main piston 2 is in contact with the left side of the middle stage of the main shaft 5, so that the main piston 2 drives the main shaft 5 to move towards the direction of the second working chamber 13 together. At this time, the high-pressure oil output from the hydraulic pump flows to the first control chamber 111 through the port P, the first oil groove 25, the third oil passage 23, the first flow groove 51, and the first oil passage 21 in this order, and the oil in the second control chamber 112 flows to the oil return tank through the second oil passage 22, the second flow groove 52, the second oil groove 22, and the port T in this order. In this way, the main piston 2 moves towards the second working chamber 13 under the action of the high-pressure oil in the first control chamber 111, and simultaneously drives the right end of the main shaft 5 to compress and apply work to the slurry in the second working chamber 13 and output the slurry through the second liquid discharge hole 17, and simultaneously drives the left end of the main shaft 5 to perform liquid suction operation in the first working chamber 12 and introduce the slurry through the first liquid inlet hole 14. At this time, since the second control chamber 2b communicates with the first control chamber 111 through the first orifice 57, the pressure of the second control chamber 2b acts on the main shaft 5 to hold the main shaft 5 at the left end position of the main piston 2.
When the master piston 2 moves to the end position with the second control chamber 112, the second auxiliary oil passage 182 communicates with the second communication groove 54, and the third auxiliary oil passage 183 communicates with the first communication groove 53. At this time, the high-pressure oil at the P port enters the first control chamber 2a through the second auxiliary oil passage 182, the second communicating groove 54, and the second communicating oil passage 56 to act on the main shaft 5, and further pushes the main shaft 5 to move toward the second working chamber 13 relative to the main piston 2, and the oil in the second control chamber 2b returns to the T port through the first communicating oil passage 55, the first communicating groove 53, and the third auxiliary oil passage 183. When the main shaft 5 moves relative to the main piston 2 in the direction of the second working chamber 13, due to the engagement of the convex column 20 and the spiral groove 59 and the inability of the main piston 2 to rotate, the main shaft 5 rotates relative to the main piston 2 in the circumferential direction, the port P is switched to be communicated with the second control chamber 112 and the port T is switched to be communicated with the first control chamber 111, and the reversing operation of the main piston 2 is completed.
When the main piston 2 moves towards the first air chamber 12, the positioning plug 6 on the right side of the main piston 2 is in contact with the right side of the middle stage of the main shaft 5, so that the main piston 2 drives the main shaft 5 to move towards the first air chamber 12 together. At this time, the high-pressure oil output from the hydraulic pump flows to the second control chamber 112 through the port P, the first oil groove 25, the third oil passage 23, the second flow passage 52, and the second oil passage 22 in sequence, and the oil in the first control chamber 111 flows to the oil return tank through the first oil passage 21, the first communication groove 51, the fourth oil passage 24, the second oil groove 26, and the port T in sequence. In this way, the main piston 2 moves towards the first working chamber 12 under the action of the high-pressure oil in the second control chamber 112, and simultaneously drives the left end of the main shaft 5 to perform compression work and output the slurry through the first liquid discharge hole 15, and simultaneously drives the right end of the main shaft 5 to perform liquid suction operation and introduce the slurry through the second liquid inlet hole 16. At this time, since the first control chamber 2a communicates with the second control chamber 112 through the second orifice 58, the pressure of the first control chamber 2a acts on the main shaft 5 to hold the main shaft 5 at the right end position of the main piston 2.
When the main piston 2 moves to the end position with the first control chamber 111, the first auxiliary oil passage 181 communicates with the first communicating groove 53, and the fourth auxiliary oil passage 184 communicates with the second communicating groove 54. At this time, the high-pressure oil at the P port enters the second control chamber 2b through the first auxiliary oil passage 181, the first communicating groove 53, and the first communicating oil passage 55 to act on the main shaft 5, thereby pushing the main shaft 5 to move toward the first working chamber 12 relative to the main piston 2, and the oil in the first control chamber 2a returns to the T port through the second communicating oil passage 56, the second communicating groove 54, and the fourth auxiliary oil passage 184. When the main shaft 5 moves relative to the main piston 2 in the direction of the second working chamber 13, due to the engagement of the convex column 20 and the spiral groove 59 and the inability of the main piston 2 to rotate, the main shaft 5 rotates relative to the main piston 2 in the circumferential direction, the port P is switched to be communicated with the first control chamber 111 and the port T is switched to be communicated with the second control chamber 112, and the reversing operation of the main piston 2 is completed.
And repeating the reciprocating action in sequence to complete the work of reciprocating liquid suction and liquid discharge of the grouting pump under the hydraulic drive.
Claims (8)
1. The grouting pump for the underground coal mine is characterized by comprising a shell, a main piston and a main shaft;
the shell is internally provided with a control chamber and a first working chamber which are mutually independent, and the shell is provided with a P port, a T port, a first liquid inlet hole and a first liquid outlet hole;
the main piston is positioned in the control chamber and divides the control chamber into a first control chamber and a second control chamber which are independent of each other; the P port and the T port are respectively communicated with the first control chamber and the second control chamber in an alternating mode, when the P port is communicated with the first control chamber, the T port is communicated with the second control chamber, and when the P port is communicated with the second control chamber, the T port is communicated with the first control chamber;
the main shaft is positioned in the shell and axially penetrates through the main piston, the main piston can drive the main shaft to axially and synchronously move, and meanwhile, the main shaft can axially move relative to the main piston and rotate in the circumferential direction relative to the main piston in the relative axial movement process; two ends of the main shaft are connected with the shell in a sliding mode along the axial direction, and the left end of the main shaft is located in the first working chamber; when the main piston drives the main shaft to axially move to a terminal position in the control chamber, the main shaft axially moves relative to the main piston and rotates in the circumferential direction relative to the main piston to complete the communication relation switching of the P port and the T port with the first control chamber and the second control chamber.
2. The slurry injection pump for the underground coal mine according to claim 1, wherein the main piston is provided with a first oil path, a second oil path, a third oil path and a fourth oil path, the main shaft is provided with a first through flow groove and a second through flow groove which are formed along the axial direction, the main shaft is further provided with a spiral groove, the main piston is provided with a convex column which extends into the spiral groove, and when the main shaft moves axially relative to the main piston, the main shaft is driven to rotate along the circumferential direction through the matching of the convex column and the spiral groove;
one end of the first oil passage is communicated with the first control chamber; one end of the second oil passage is communicated with the second control chamber; one end of the third oil path is communicated with the port P, and the other end of the third oil path is selectively communicated with the first through flow groove and the second through flow groove; one end of the fourth oil path is communicated with the T port, and the other end of the fourth oil path is selectively communicated with the first through flow groove and the second through flow groove;
when the main shaft moves along with the main piston towards the direction of the first control chamber, the first oil path is communicated with the fourth oil path through a first through flow groove, and the second oil path is communicated with the third oil path through a second through flow groove; when the main shaft moves along with the main piston towards the direction of the second control chamber, the first oil path is communicated with the third oil path through the first through flow groove, and the second oil path is communicated with the fourth oil path through the second through flow groove;
when the main shaft moves relative to the main piston in the direction of the first control chamber, the first oil path is switched to be communicated with the third oil path through the first through flow groove, and the second oil path is switched to be communicated with the fourth oil path through the second through flow groove; when the main shaft moves relative to the main piston in the direction of the second control chamber, the second oil path is switched to the second through-flow groove to be communicated with the third oil path, and the first oil path is switched to be communicated with the fourth oil path through the first through-flow groove.
3. The slurry injection pump for the underground coal mine according to claim 2, wherein a first oil groove and a second oil groove which are axially formed in the outer surface of the main piston, the first oil groove and the third oil passage and the P port are symmetrically distributed in the circumferential direction and are communicated with each other, and the second oil groove and the fourth oil passage and the T port are communicated with each other.
4. The slurry injection pump for the underground coal mine according to claim 1, wherein a first auxiliary oil path, a second auxiliary oil path, a third auxiliary oil path and a fourth auxiliary oil path are arranged on the casing, a first communicating groove and a second communicating groove are arranged on the main shaft, a first control cavity and a second control cavity are respectively formed at two ends of the main shaft and the main piston, a first communicating oil path for communicating the first communicating groove and the second control cavity and a second communicating oil path for communicating the second communicating groove and the first control cavity are arranged in the main shaft, and a first damping hole for communicating the first control chamber and the first communicating oil path and a second damping hole for communicating the second control chamber and the second communicating oil path are arranged on the main shaft;
one end of the first auxiliary oil way is communicated with the port P, and the other end of the first auxiliary oil way is selectively communicated with the first connecting groove; one end of the second auxiliary oil way is communicated with the port P, and the other end of the second auxiliary oil way is selectively communicated with the second communication groove; one end of the third auxiliary oil way is communicated with the T port, one end of the third auxiliary oil way is communicated with the first reversing chamber, and the other end of the third auxiliary oil way is selectively communicated with the first connecting groove; one end of the fourth auxiliary oil way is communicated with the T port, and the other end of the fourth auxiliary oil way is selectively communicated with the second communication groove;
in the process that the main shaft moves along with the main piston, the first auxiliary oil path and the third auxiliary oil path are kept disconnected from the first communicating groove, and the second auxiliary oil path and the fourth auxiliary oil path are kept disconnected from the second communicating groove; when the main shaft moves to the terminal of the first control chamber along with the main piston and the first auxiliary oil way is communicated with the first communicating groove, the fourth auxiliary oil way is communicated with the second communicating groove; and when the main piston moves to the terminal position of the second control chamber and the second auxiliary oil way is communicated with the second communicating groove, the third auxiliary oil way is communicated with the first communicating groove.
5. The slurry injection pump for the underground coal mine according to claim 3, wherein the first communicating groove and the second communicating groove are annular grooves along a circumferential direction.
6. The underground grouting pump for the coal mine according to claim 1, wherein the underground grouting pump for the coal mine is further provided with a rotation stopping rod; the rotation stopping rod penetrates through the main piston along the axial direction and then is fixed in the shell.
7. The slurry injection pump for the underground coal mine according to claim 1, wherein a second working chamber which is independent from the control chamber and the first working chamber is further arranged inside the casing, and a second liquid inlet hole and a second liquid outlet hole which are communicated with the second working chamber are further formed in the casing; the right end of the main shaft is located in the second working chamber.
8. The slurry injection pump for the underground coal mine according to any one of claims 1 to 7, wherein the casing is of a split structure, and a partition is arranged inside the casing to divide the inside of the casing into a control chamber and a first working chamber which are distributed along an axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911398413.9A CN111075680A (en) | 2019-12-30 | 2019-12-30 | Grouting pump for underground coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911398413.9A CN111075680A (en) | 2019-12-30 | 2019-12-30 | Grouting pump for underground coal mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111075680A true CN111075680A (en) | 2020-04-28 |
Family
ID=70319942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911398413.9A Withdrawn CN111075680A (en) | 2019-12-30 | 2019-12-30 | Grouting pump for underground coal mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111075680A (en) |
-
2019
- 2019-12-30 CN CN201911398413.9A patent/CN111075680A/en not_active Withdrawn
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Application publication date: 20200428 |
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