CN112855485A - Hydraulic grouting pump for underground coal mine - Google Patents
Hydraulic grouting pump for underground coal mine Download PDFInfo
- Publication number
- CN112855485A CN112855485A CN202110239325.5A CN202110239325A CN112855485A CN 112855485 A CN112855485 A CN 112855485A CN 202110239325 A CN202110239325 A CN 202110239325A CN 112855485 A CN112855485 A CN 112855485A
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- China
- Prior art keywords
- cylinder
- hydraulic
- hydraulic cylinder
- coal mine
- grouting pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000003245 coal Substances 0.000 title claims abstract description 27
- 239000002002 slurry Substances 0.000 claims abstract description 32
- 238000003754 machining Methods 0.000 claims description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 5
- 239000004570 mortar (masonry) Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- 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
- F04B53/22—Arrangements for enabling ready assembly or disassembly
-
- 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
- F04B9/103—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 only one pumping chamber
- F04B9/105—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 only one pumping chamber reciprocating movement of the pumping member being obtained by a double-acting liquid motor
- F04B9/1056—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 only one pumping chamber reciprocating movement of the pumping member being obtained by a double-acting liquid motor with fluid-actuated inlet or outlet valve
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention belongs to the technical field of coal mine underground operation. A hydraulic grouting pump for a coal mine underground comprises a chassis, an oil tank, a hydraulic cylinder and a slurry cylinder, wherein the oil tank is arranged on the chassis; an oil pump and a main reversing valve group are arranged between the oil tank and the hydraulic cylinder; a connecting frame and a pilot reversing unit are arranged between the hydraulic cylinder and the pulp cylinder, and the connecting frame is used for controlling the coaxiality of the hydraulic cylinder and the pulp cylinder; the pilot reversing unit is used for controlling the reversing of the main reversing valve group. This application structural design is reasonable, can effectively solve the pneumatic cylinder and the thick liquid jar indirect easy decentraction and cause "draw jar" phenomenon, improves the life of thick liquid jar and piston to the reversing mechanism of this application is simple reliable, can adapt to the switching-over requirement of well high pressure grouting pump.
Description
Technical Field
The invention belongs to the technical field of coal mine underground operation, and particularly relates to a hydraulic grouting pump for a coal mine underground.
Background
The underground hydraulic grouting pump for the coal mine is applied more and is mainly used for grouting reinforcement, grouting water plugging, grouting fire prevention and extinguishment, hole sealing during gas drainage and the like. The single-cylinder double-acting hydraulic grouting pump is used as a reciprocating pump, can realize double-liquid grouting due to small volume, and is widely applied to underground coal mines.
The reversing signal of the existing single-cylinder double-acting hydraulic grouting pump commonly used in coal mines is mainly obtained from the reciprocating motion of a piston cylinder of an oil cylinder. The hydraulic cylinder and the slurry cylinder are arranged in two modes, one mode is that the hydraulic cylinder and the slurry cylinder are tightly connected, a piston rod at the other end of the oil cylinder, which is not connected with the slurry cylinder, extends out due to the requirement of the reversing mechanism, and the reversing mechanism is connected through a shifting mechanism. In another mode, the hydraulic cylinder and the mortar cylinder are not directly connected, the hydraulic cylinder and the mortar cylinder are respectively connected to other structural components, the hydraulic cylinder and the mortar cylinder are connected into a whole through long bolts, the oil cylinder piston cylinder is conveniently and directly connected with a mortar cylinder piston rod into a whole, the piston rod is high in strength and good in rigidity, and the reversing mechanism is conveniently driven to move. However, the structure is complex due to the fact that the connecting pieces are connected, the concentricity of the hydraulic cylinder and the slurry cylinder cannot be guaranteed, the piston of the slurry cylinder and the cylinder body of the slurry cylinder are not concentric during working, the phenomenon of cylinder pulling is easy to occur, and the piston and the cylinder body of the slurry cylinder are damaged.
Due to the explosion-proof requirement of a coal mine, the reciprocating motion of the piston rod is difficult to be fed back to the main (electromagnetic) reversing valve by the reversing mechanism through an electric signal of the proximity switch, so that the reciprocating motion of the oil cylinder is realized. Generally, a hydraulic cylinder is adopted to push a pilot hydraulic valve to change direction, then a main reversing valve is controlled to realize the reversing of the hydraulic cylinder, and further, the pulp cylinder is driven to change direction, and the pulp sucking and discharging process is realized. The pilot hydraulic valve has two types, one is a slide valve, and the other is a rotary valve. The slide valve is suitable for medium and low pressure conditions, and the adaptive pressure range of the slide valve is wide. Among the arrangement modes of the hydraulic cylinder and the paddle cylinder, the first arrangement mode is characterized in that the extension of a piston rod of the hydraulic cylinder is not limited by the paddle cylinder, so that the space is large, and a slide valve is convenient to adopt as a pilot hydraulic valve. In the second arrangement mode, because a piston rod of the hydraulic cylinder extends out between the hydraulic cylinder and the slurry cylinder, the space is limited, and the pilot hydraulic valve is provided with more rotary valves, so that the grouting pressure range of the grouting pump is limited. The spool valve is also used as a pilot hydraulic valve, but the structure is complicated and the reliability is poor.
Disclosure of Invention
The invention aims to solve the problems and the defects in the prior art, and provides a hydraulic grouting pump for a coal mine underground, which has reasonable structural design, can effectively solve the problem of cylinder pulling caused by non-direct and easy non-concentricity of a hydraulic cylinder and a slurry cylinder, prolongs the service life of the slurry cylinder and a piston, has a simple and reliable reversing mechanism, and can meet the reversing requirement of a medium-high pressure grouting pump.
In order to realize the purpose, the adopted technical scheme is as follows:
a hydraulic grouting pump for underground coal mine comprises:
a chassis;
the oil tank is arranged on the chassis;
the hydraulic cylinder is provided with an oil pump and a main reversing valve group between the oil tank and the hydraulic cylinder; and
the connecting frame is used for controlling the coaxiality of the hydraulic cylinder and the pulp cylinder; the pilot reversing unit is used for controlling the reversing of the main reversing valve group.
According to the hydraulic grouting pump for the underground coal mine, the pilot reversing unit preferably comprises:
a stationary housing;
a pilot valve disposed within the stationary housing;
the middle part of the connecting rod is hinged with the fixed shell, and the first end part of the connecting rod is connected with the valve core of the pilot valve; and
the second end part of the connecting rod is connected with the shifting fork; the hydraulic cylinder piston rod of the hydraulic cylinder and the slurry cylinder piston rod of the slurry cylinder are coaxially connected, a driving plate corresponding to the shifting fork is arranged between the hydraulic cylinder piston rod and the slurry cylinder piston rod, and the driving plate moves back and forth along with the hydraulic cylinder piston rod and the slurry cylinder piston rod.
According to the hydraulic grouting pump for the underground coal mine, the middle part of the shifting fork is preferably connected with the connecting rod, and the left end and the right end of the shifting fork are respectively provided with the first contact part and the second contact part which are arc-shaped.
According to the hydraulic grouting pump for the underground coal mine, the pilot valve is preferably a slide valve.
According to the hydraulic grouting pump for the underground coal mine, the connecting frame preferably comprises:
a housing;
the first assembling end and the second assembling end are arranged at two end parts of the shell and are respectively connected with the hydraulic cylinder and the pulp cylinder; and
the assembly table is arranged on the side portion of the shell, an assembly through groove is formed in the assembly table, and the pilot reversing unit is arranged on the assembly table in a matched mode.
According to the hydraulic grouting pump for the underground coal mine, a support pedestal is preferably arranged at the lower part of the shell.
According to the hydraulic grouting pump for the underground coal mine, preferably, the first assembling end and the second assembling end are coaxially provided with a first assembling inner arc surface and a second assembling inner arc surface, and the first assembling inner arc surface and the second assembling inner arc surface are formed in one-step machining mode.
By adopting the technical scheme, the beneficial effects are as follows:
the invention provides a hydraulic grouting pump for a coal mine underground, which solves the problems that a hydraulic cylinder and a slurry cylinder are not directly connected and are easy to be non-concentric, so that the phenomenon of cylinder pulling is caused, and the slurry cylinder and a piston are damaged. And meanwhile, a driving plate and a shifting fork are arranged between the hydraulic cylinder and the paddle cylinder, the shifting fork pushes a reversing mechanism to realize the reversing of the pump, and a pilot valve of the reversing mechanism adopts a manual reversing slide valve. The reversing mechanism is simple and reliable, and can meet the reversing requirement of a medium-high pressure grouting pump.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly described below. Wherein the drawings are only for purposes of illustrating some embodiments of the invention and are not to be construed as limiting the invention to all embodiments thereof.
Fig. 1 is a schematic structural view of a hydraulic grouting pump for a coal mine according to an embodiment of the invention.
Fig. 2 is a schematic top view of the structure of fig. 1.
Fig. 3 is a schematic structural diagram of a connection frame according to an embodiment of the invention.
Fig. 4 is a schematic top view of fig. 3.
Fig. 5 is a side view of the structure of fig. 3.
Fig. 6 is a schematic structural diagram of a pilot reversing unit according to an embodiment of the present invention.
Fig. 7 is a schematic top view of the structure of fig. 6.
Number in the figure:
100 is a chassis;
200 is an oil tank;
300 is an oil pump, 311 is a motor;
400 is a hydraulic cylinder, 410 is a main reversing valve group, and 420 is a hydraulic cylinder piston rod;
500 is a slurry cylinder, 510 is a slurry cylinder piston rod;
600 is a connecting frame, 601 is a shell, 602 is a first assembling end, 603 is a second assembling end, 604 is an assembling table, 605 is an assembling through groove, and 606 is a supporting table seat;
700 is a pilot ring unit, 701 is a fixed housing, 702 is a pilot valve, 703 is a link, 704 is a shift fork, 7041 is a first touching portion, 7042 is a second touching portion, and 705 is a dial.
Detailed Description
Illustrative aspects of embodiments of the invention are described more fully hereinafter with reference to the accompanying drawings, in which specific embodiments of the invention are shown. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art.
In the description of the present invention, it should be understood that the terms "first" and "second" are used to describe various elements of the invention, and are not intended to limit any order, quantity, or importance, but rather are used to distinguish one element from another.
It should be noted that when an element is referred to as being "connected," "coupled," or "connected" to another element, it can be directly connected, coupled, or connected, but it is understood that intervening elements may be present therebetween; i.e., positional relationships encompassing both direct and indirect connections.
It should be noted that the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.
It should be noted that terms indicating orientation or positional relationship such as "upper", "lower", "left", "right", and the like, are used only for indicating relative positional relationship, which is for convenience in describing the present invention, and do not indicate that the device or element must have a specific orientation, be constructed and operated in a specific orientation; when the absolute position of the object to be described is changed, the relative positional relationship may also be changed accordingly.
Referring to fig. 1-7, the application discloses a hydraulic grouting pump for a coal mine underground, which comprises a chassis 100, an oil tank 200, a hydraulic cylinder 400 and a grout cylinder 500, wherein the oil tank 200 is arranged on the chassis 100; an oil pump 300 and a main directional control valve group 410 are arranged between the oil tank 200 and the hydraulic cylinder 400; a connecting frame 600 and a pilot reversing unit 700 are arranged between the hydraulic cylinder 400 and the slurry cylinder 500, and the connecting frame 600 is used for controlling the coaxiality of the hydraulic cylinder 400 and the slurry cylinder 500 to realize the coaxial transmission connection of a hydraulic cylinder piston rod and a slurry cylinder piston rod; the pilot switching unit 700 is used to control the switching of the main switching valve group 410.
Preferably, the pilot reversing unit 700 in this embodiment includes a fixed housing 701, a pilot valve 702, a link 703 and a shift fork 704, the pilot valve 702 being disposed in the fixed housing 701; the middle part of the connecting rod 703 is hinged with the fixed shell 701, and the first end part of the connecting rod 703 is connected with the valve core of the pilot valve 702; a second end of the link 703 is connected to a fork 704; the hydraulic cylinder piston rod 420 of the hydraulic cylinder 400 is coaxially connected with the mortar cylinder piston rod 510 of the mortar cylinder 500, a dial 705 corresponding to the shifting fork 704 is arranged between the hydraulic cylinder piston rod 420 and the mortar cylinder piston rod 510, and the dial 705 reciprocates along with the hydraulic cylinder piston rod 420 and the mortar cylinder piston rod 510.
Further, the middle of the shifting fork 704 in this embodiment is connected to the connecting rod 703, and the left and right ends of the shifting fork 704 are respectively provided with a first touching portion 7041 and a second touching portion 7042 in an arc shape; the pilot valve 702 is a spool valve.
The connecting frame 600 in this embodiment includes a housing 601, a first assembling end 602 and a second assembling end 603 provided at both ends of the housing, and an assembling table 604, the first assembling end and the second assembling end being connected to the hydraulic cylinder and the pulp cylinder, respectively; the assembly table is arranged on the side part of the shell, an assembly through groove 605 is arranged on the assembly table, the pilot reversing unit is arranged on the assembly table in a matching mode, and a support pedestal 606 is arranged on the lower portion of the shell. The casing of this embodiment is cylindrical cavity structure to hydraulic cylinder piston rod and thick liquid jar piston rod are inside reciprocating motion, and the setting of assembly logical groove makes guide's switching-over unit and driver plate can realize counterpointing the assembly, also is convenient for guide's switching-over unit's fixed.
When the slurry pump works, the motor drives the oil pump to generate hydraulic pressure, the pressure oil path is divided into two paths, one path enters the hydraulic cylinder through the main reversing valve group to drive the piston rod of the hydraulic cylinder to move, and the hydraulic cylinder drives the slurry cylinder to realize the reciprocating motion of the slurry cylinder and drive the slurry sucking and discharging valve group to suck and discharge slurry.
The connecting frame is of a frame structure, and two ends of the connecting frame are respectively provided with an inner circular surface which is respectively matched and connected with the hydraulic cylinder and the pulp cylinder. The inner circular surfaces at the two ends of the connecting frame can be processed and formed at one time, so that the coaxiality can be ensured, and further, the coaxiality of the hydraulic cylinder and the slurry cylinder is ensured, and the phenomenon of cylinder pulling is not easy to occur.
The pilot reversing unit is arranged on the side face of the connecting frame and mainly comprises a shifting fork, a connecting rod, a fixing plate, a pilot valve plate and a pilot valve, and the pilot valve is a manual reversing slide valve. The fixed plate and the pilot valve plate form a shell and are mainly used for fixing the pilot valve and conducting an oil way, the connecting rod is connected with a valve core of the pilot valve, the other end of the connecting rod is connected with the shifting fork, and the middle of the connecting rod is hinged with the shell. In order to realize the control of the main reversing valve group, the pilot valve reversing oil port is connected with the control oil port of the main reversing valve group. When the hydraulic cylinder operates, the piston rod of the hydraulic cylinder drives the driving plate to stir the shifting fork to drive the pilot valve core to operate, so that the main reversing valve group is controlled to realize the reversing of the oil way of the hydraulic cylinder, and the suction and the discharge of the pump are further completed. Because the pilot reversing device adopts the slide valve as the pilot valve, the pilot reversing device can be suitable for medium and high pressure hydraulic systems, and has a wide application range.
While the preferred embodiments for carrying out the invention have been described in detail, it should be understood that they have been presented by way of example only, and not limitation as to the scope, applicability, or configuration of the invention in any way. The scope of the invention is defined by the appended claims and equivalents thereof. Many modifications may be made to the foregoing embodiments by those skilled in the art, which modifications are within the scope of the present invention.
Claims (7)
1. The utility model provides a colliery is hydraulic grouting pump for pit which characterized in that includes:
a chassis;
the oil tank is arranged on the chassis;
the hydraulic cylinder is provided with an oil pump and a main reversing valve group between the oil tank and the hydraulic cylinder; and
the connecting frame is used for controlling the coaxiality of the hydraulic cylinder and the pulp cylinder; the pilot reversing unit is used for controlling the reversing of the main reversing valve group.
2. The hydraulic grouting pump for the underground coal mine according to claim 1, wherein the pilot reversing unit comprises:
a stationary housing;
a pilot valve disposed within the stationary housing;
the middle part of the connecting rod is hinged with the fixed shell, and the first end part of the connecting rod is connected with the valve core of the pilot valve; and
the second end part of the connecting rod is connected with the shifting fork; the hydraulic cylinder piston rod of the hydraulic cylinder and the slurry cylinder piston rod of the slurry cylinder are coaxially connected, a driving plate corresponding to the shifting fork is arranged between the hydraulic cylinder piston rod and the slurry cylinder piston rod, and the driving plate moves back and forth along with the hydraulic cylinder piston rod and the slurry cylinder piston rod.
3. The hydraulic grouting pump for the underground coal mine according to claim 2, wherein the middle part of the shifting fork is connected with the connecting rod, and a first contact part and a second contact part which are arc-shaped are respectively arranged at the left end and the right end of the shifting fork.
4. The hydraulic grouting pump for the underground coal mine according to claim 2, wherein the pilot valve is a slide valve.
5. The hydraulic grouting pump for the underground coal mine according to any one of claims 1 to 4, wherein the connecting frame comprises:
a housing;
the first assembling end and the second assembling end are arranged at two end parts of the shell and are respectively connected with the hydraulic cylinder and the pulp cylinder; and
the assembly table is arranged on the side portion of the shell, an assembly through groove is formed in the assembly table, and the pilot reversing unit is arranged on the assembly table in a matched mode.
6. The hydraulic grouting pump for the underground coal mine according to claim 5, wherein a support pedestal is arranged at the lower part of the casing.
7. The hydraulic grouting pump for the underground coal mine according to claim 5, wherein the first assembling end and the second assembling end are coaxially provided with a first assembling intrados and a second assembling intrados, and the first assembling intrados and the second assembling intrados are formed in one-step machining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110239325.5A CN112855485A (en) | 2021-03-04 | 2021-03-04 | Hydraulic grouting pump for underground coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110239325.5A CN112855485A (en) | 2021-03-04 | 2021-03-04 | Hydraulic grouting pump for underground coal mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112855485A true CN112855485A (en) | 2021-05-28 |
Family
ID=75991603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110239325.5A Pending CN112855485A (en) | 2021-03-04 | 2021-03-04 | Hydraulic grouting pump for underground coal mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112855485A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1304684A (en) * | 1961-07-28 | 1962-09-28 | Hydraulic piston pump for pumping thick, slurry or plastic products | |
| CN201007087Y (en) * | 2007-01-10 | 2008-01-16 | 广西大都混凝土有限公司 | Concrete conveying apparatus |
| CN102330651A (en) * | 2011-10-13 | 2012-01-25 | 三一重工股份有限公司 | Thick slurry pump and pumping system thereof |
| CN108730151A (en) * | 2018-05-18 | 2018-11-02 | 东莞海特帕沃液压科技有限公司 | A kind of high-pressure injection pump of hydraulic-driven |
| CN209115275U (en) * | 2018-11-28 | 2019-07-16 | 江苏江林机械有限公司 | A kind of electromagnetic switch formula hydraulic grouting pump |
| CN209146022U (en) * | 2018-11-28 | 2019-07-23 | 江苏江林机械有限公司 | A kind of mining two-way automatic hydraulic reversing mechanism |
| CN210994715U (en) * | 2019-10-17 | 2020-07-14 | 江苏唐源生物发电有限公司 | Stable reinforcing assembly of high-strength crushing equipment |
| CN211230743U (en) * | 2019-12-06 | 2020-08-11 | 平顶山市碧源科技有限公司 | Crawler walking type hydraulic grouting pump for coal mine |
| CN214998060U (en) * | 2021-03-04 | 2021-12-03 | 河南省煤科院科明机电设备有限公司 | Hydraulic grouting pump for underground coal mine |
-
2021
- 2021-03-04 CN CN202110239325.5A patent/CN112855485A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1304684A (en) * | 1961-07-28 | 1962-09-28 | Hydraulic piston pump for pumping thick, slurry or plastic products | |
| CN201007087Y (en) * | 2007-01-10 | 2008-01-16 | 广西大都混凝土有限公司 | Concrete conveying apparatus |
| CN102330651A (en) * | 2011-10-13 | 2012-01-25 | 三一重工股份有限公司 | Thick slurry pump and pumping system thereof |
| CN108730151A (en) * | 2018-05-18 | 2018-11-02 | 东莞海特帕沃液压科技有限公司 | A kind of high-pressure injection pump of hydraulic-driven |
| CN209115275U (en) * | 2018-11-28 | 2019-07-16 | 江苏江林机械有限公司 | A kind of electromagnetic switch formula hydraulic grouting pump |
| CN209146022U (en) * | 2018-11-28 | 2019-07-23 | 江苏江林机械有限公司 | A kind of mining two-way automatic hydraulic reversing mechanism |
| CN210994715U (en) * | 2019-10-17 | 2020-07-14 | 江苏唐源生物发电有限公司 | Stable reinforcing assembly of high-strength crushing equipment |
| CN211230743U (en) * | 2019-12-06 | 2020-08-11 | 平顶山市碧源科技有限公司 | Crawler walking type hydraulic grouting pump for coal mine |
| CN214998060U (en) * | 2021-03-04 | 2021-12-03 | 河南省煤科院科明机电设备有限公司 | Hydraulic grouting pump for underground coal mine |
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