CN113340167A - A block up device that is used for semi-automatic big gun hole of tunnelling blasting to block up - Google Patents
A block up device that is used for semi-automatic big gun hole of tunnelling blasting to block up Download PDFInfo
- Publication number
- CN113340167A CN113340167A CN202110503490.7A CN202110503490A CN113340167A CN 113340167 A CN113340167 A CN 113340167A CN 202110503490 A CN202110503490 A CN 202110503490A CN 113340167 A CN113340167 A CN 113340167A
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- automatic
- mud
- air
- pipe
- cavity
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- 238000005422 blasting Methods 0.000 title claims description 20
- 230000000903 blocking effect Effects 0.000 claims abstract description 22
- 238000012856 packing Methods 0.000 claims abstract description 9
- 238000005192 partition Methods 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 17
- 230000005641 tunneling Effects 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 239000011435 rock Substances 0.000 claims description 5
- 238000005553 drilling Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/006—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
- F42D1/18—Plugs for boreholes
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Earth Drilling (AREA)
Abstract
The inner cavity of the blocking device is sequentially divided into a push rod air cavity, a rod withdrawing air cavity and a mud storage cavity along the length direction, the rod withdrawing air cavity and the mud storage cavity are divided by a partition wall, and the push rod air cavity and the rod withdrawing air cavity are divided by one end of a piston type push-pull structure; one end of the automatic filling cylinder body is connected with a mud outlet pipe communicated with the mud storage cavity through a first one-way valve; a mud inlet pipe and an air inlet pipe are arranged on one side of the automatic filling cylinder at intervals, and the mud inlet pipe can be communicated with the mud storage cavity through a second one-way valve; install the tuber pipe on one side bottom of automatic barrel of packing, the first end of tuber pipe communicates in push rod wind chamber, and the second end communicates in moving back the pole wind chamber, and the air-supply line passes through three-phase switch and connects in the third end at tuber pipe middle part. The device is portable, and the blast hole blocks up airtight effectual.
Description
Technical Field
The application relates to the blasting field, in particular to a blocking device for semi-automatic blast hole blocking of tunneling blasting.
Background
Underground excavation blasting is a mature blasting technology and is widely applied to the fields of underground mine roadway excavation, tunnel engineering excavation, underground space engineering and the like. The underground tunneling blasting is characterized in that blast holes are formed by pneumatic rock drilling, the number of the blast holes is large, the diameter of the blast holes is small, and the blocking length is fixed. The purpose of blast hole blocking is to increase the pressure of detonation gas on the hole wall and prolong the action time of the pressure, so that the spalling degree and the throwing distance of the rock are greatly improved, and the efficiency and the quality of blast hole blocking are one of important factors influencing the tunneling blasting effect and the efficiency.
At present, most of blast hole blockage of tunneling blasting adopts a blast rod to fill drilling slag and mud chips into blast holes, and the method has the following defects: 1. the efficiency is too low, manual repeated charging is needed, and the gun rod is pushed to fill; 2. the drilling slag as a plugging material has insufficient sealing property, cannot achieve the purpose of preventing gas from escaping from a blast hole when explosive explodes due to the blockage of the blast hole, and has poor plugging effect.
Disclosure of Invention
One of the purposes of the application is to provide a blocking device for semi-automatic blast hole blocking of tunneling blasting, and the blocking device aims to solve the problem that the existing blast hole blocking is low in working efficiency.
The technical scheme of the application is as follows:
a blocking device for blocking a semi-automatic blast hole for tunneling blasting comprises an automatic filling barrel, wherein an inner cavity of the automatic filling barrel is sequentially divided into a push rod air cavity, a rod returning air cavity and a mud storage cavity along the length direction, the rod returning air cavity and the mud storage cavity are divided by a partition wall, the push rod air cavity and the rod returning air cavity are divided by one end of a piston type push-pull structure, one end of the piston type push-pull structure is axially movably mounted on two opposite inner walls of the automatic filling barrel, and the other end of the piston type push-pull structure is axially movably mounted on two opposite inner walls of the mud storage cavity; one end of the automatic filling cylinder is connected with a mud outlet pipe communicated with the mud storage cavity through a first one-way valve; a mud inlet pipe and an air inlet pipe are arranged on one side of the automatic filling cylinder at intervals, and the mud inlet pipe can be communicated with the mud storage cavity through a second one-way valve; install the tuber pipe on one side bottom of automatic barrel of packing, the first end of tuber pipe communicate in push rod air chamber, the second end communicate in move back the pole air chamber, the air-supply line pass through three-phase switch connect in the third end at tuber pipe middle part.
As a technical solution of the present application, the automatic filling cylinder is made of high-strength steel.
As a technical scheme of this application, go out the mud pipe and be the rubber hose, and the diameter is less than the diameter of big gun hole, and with the play mud end threaded connection who loads the barrel automatically.
As a technical scheme of this application, advance mud pipe be the rubber hose, and with the mud end threaded connection that advances of automatic barrel of packing.
As a technical scheme of this application, piston push-and-pull structure is I shape structure, and both ends all through sealing rubber movably connect in on the inner wall of automatic barrel of packing.
As a technical scheme of this application, install two relief valves on another lateral wall of the automatic barrel of filling at interval, the relief valve with automatic barrel sealing connection fills, and is in the tip of the automatic barrel of filling with between the division wall.
As a technical scheme of this application, the first end of tuber pipe with automatic the barrel of packing passes through thread sealing connection, the second end with automatic the barrel of packing passes through thread sealing connection, the third end with the air-supply line passes through thread sealing connection.
As a technical scheme of this application, the air-supply line is air-leg rock drill air-supply line.
As a technical scheme of this application, the bottom fixed mounting who loads the barrel automatically has the triangular supports frame that two intervals set up.
The beneficial effect of this application:
according to the plugging device for the semi-automatic blast hole plugging for tunneling blasting, the three-phase switch is opened to the right, so that high-pressure air of the air inlet pipe enters the push rod air cavity, the high-pressure air pushes the rear end of the piston type push-pull structure to move to the left, meanwhile, the first one-way valve at the mud outlet pipe is opened, the second one-way valve at the mud inlet pipe is closed, and the front end of the piston type push-pull structure moves to the left, so that air in the mud storage cavity is discharged; through opening three-phase switch left side, the highly compressed air of air-supply line enters into and moves back in the pole wind chamber, highly compressed air promotes piston push-and-pull structure's rear end and moves right, and the first check valve that goes out mud pipe department simultaneously closes, and the second check valve that advances mud pipe department opens, and piston push-and-pull structure's front end moves right and causes to hold mud intracavity and produce the vacuum, and the stemming is full of through advancing the mud pipe simultaneously and holds the mud chamber to the big gun hole is packed into with going out the mud pipe, makes three-phase switch open on the right again, then can discharge the stemming and accomplish big gun hole jam. The device simple structure, it is convenient to use, and the automatic big gun hole that realizes blocks up, and work efficiency is high, blocks up effectually.
Drawings
In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic diagram of a plugging device for semi-automatic hole plugging of tunneling blasting according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an automatic filling cartridge provided in an embodiment of the present application.
Icon: 1-automatically filling a cylinder; 2-push rod air cavity; 3-withdrawing the rod wind cavity; 4-a mud storage cavity; 5-a partition wall; 6-piston type push-pull structure; 7-a first one-way valve; 8-a mud outlet pipe; 9-a mud inlet pipe; 10-an air inlet pipe; 11-a second one-way valve; 12-air pipe; 13-a three-phase switch; 14-a pressure relief valve; 15-a triangular support frame; and 16-blast hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like refer to orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.
Further, in the present application, unless expressly stated or limited otherwise, the first feature may be directly contacting the second feature or may be directly contacting the second feature, or the first and second features may be contacted with each other through another feature therebetween, not directly contacting the second feature. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Example (b):
referring to fig. 1 and fig. 2 in combination, the present application provides a blocking device for semi-automatic blast hole blocking of tunneling blasting, which comprises an automatic filling cylinder 1, wherein the automatic filling cylinder 1 is made of high-strength steel, and an inner cavity of the automatic filling cylinder is sequentially divided into a push rod air cavity 2, a rod withdrawing air cavity 3 and a mud storage cavity 4 along the length direction of the automatic filling cylinder; the rod withdrawing air cavity 3 and the sludge storage cavity 4 are separated by a partition wall 5, and the push rod air cavity 2 and the rod withdrawing air cavity 3 are separated by one end of a piston type push-pull structure 6; one end of the piston type push-pull structure 6 is axially movably mounted on two opposite inner walls of the automatic charging cylinder 1, and the other end is axially movably mounted on two opposite inner walls of the mud storage cavity 4. In addition, one end of the automatic filling cylinder body 1 is connected with a mud outlet pipe 8 communicated with the mud storage cavity 4 through a first one-way valve 7; a mud inlet pipe 9 and an air inlet pipe 10 are connected to one side of the automatic filling cylinder 1 at intervals, and the mud inlet pipe 9 can be communicated with the mud storage cavity 4 through a second one-way valve 11; the bottom of the same side of the automatic filling cylinder 1 is provided with an air pipe 12, the air pipe 12 is provided with a first end, a second end and a third end, the first end is communicated with the push rod air cavity 2, the second end is communicated with the rod air cavity 3, and the air inlet pipe 10 is connected with the third end in the middle of the air pipe 12 through a three-phase switch 13.
It should be noted that, in this embodiment, the mud discharging pipe 8 is made of a steel wire rubber hose, the diameter of the hose is slightly smaller than the diameter of the blast hole 16, the hose has certain strength and toughness, the hose can be easily plugged into the blast hole 16 by an operator, and the mud discharging pipe 8 and the mud discharging end of the automatic charging barrel 1 are firmly and reliably connected through a thread.
Meanwhile, the mud inlet pipe 9 is made of a rubber hose with steel wires and is in threaded connection with the mud inlet end of the automatic filling cylinder 1. In addition, the mud inlet pipe 9 is provided with a heavy end for increasing weight, so that the inconvenience in operation caused by the problem that the mud inlet pipe 9 cannot sink into the bottom of a mud gun pool when being placed into the mud gun pool is avoided; and, be provided with a plurality of mud inlet hole on the tip of advancing mud pipe 9, both can improve into mud efficiency, can avoid effectively again to advance the mud difficult problem that mud hole is blockked up and is caused.
In addition, in this embodiment, this piston push-and-pull structure 6 is the I shape structure, and both ends all are connected on the inner wall of automatic filling barrel 1 through sealing rubber is movably, and the body of rod intensity of piston push-and-pull structure 6 satisfies the life requirement. The automatic filling cylinder body 1 is made of high-strength steel, and meets the use requirements of the device on strength, sealing property, friction resistance, rust resistance and the like.
Two pressure relief valves 14 are mounted on the other outer side wall of the automatic filling cylinder 1 at intervals, and the pressure relief valves 14 are connected with the automatic filling cylinder 1 in a sealing manner and are located between the end part of the automatic filling cylinder 1 and the partition wall 5. The pressure release valve 14 can also be used as an air outlet to ensure stable and safe pressure in the push rod air cavity 2 and the rod withdrawing air cavity 3.
In addition, the air inlet pipe 10 is provided with a three-phase switch 13, so that the air inlet direction can be controlled and the air inlet pipe can be closed at any time.
The first end of tuber pipe 12 passes through screw thread sealing connection with automatic barrel 1 of packing, and the second end passes through screw thread sealing connection with automatic barrel 1 of packing, and the third end passes through screw thread sealing connection with air-supply line 10. The strength and the section area of the air pipe 12 are matched with the air pressure.
The air inlet pipe 10 can adopt an air inlet pipe 10 of an air-leg rock drilling machine commonly used in a construction site, and the connection mode is the same as that in the prior art.
The bottom of the automatic filling cylinder 1 is fixedly provided with two triangular supports 15 arranged at intervals, and the triangular supports are connected with the automatic filling cylinder 1 through bolts.
The working principle of the blocking device for the semi-automatic blast hole blocking of tunneling blasting is as follows:
the three-phase switch 13 is opened to the right, so that high-pressure air of the air inlet pipe 10 enters the push rod air cavity 2, the high-pressure air pushes the rear end of the piston type push-pull structure 6 to move to the left, meanwhile, the first one-way valve 7 at the mud outlet pipe 8 is opened, the second one-way valve 11 at the mud inlet pipe 9 is closed, and the front end of the piston type push-pull structure 6 moves to the left, so that air in the mud storage cavity 4 is exhausted; through opening three phase switch 13 on the left, the highly compressed air of air-supply line 10 enters into and moves back pole wind chamber 3, highly compressed air promotes the rear end of piston push-and-pull structure 6 and moves right, the first check valve 7 of the 8 departments of mud pipe of play simultaneously closes, the second check valve 11 of the 9 departments of mud pipe of advancing opens, the front end of piston push-and-pull structure 6 moves right and causes to hold and produce the vacuum in mud chamber 4, the stemming is full of through advancing mud pipe 9 and holds mud chamber 4 simultaneously, thereby the big gun hole 16 is packed into to mud pipe 8, make three phase switch 13 open on the right again, then can discharge the big gun hole and accomplish the jam of big gun hole 16.
Therefore, the device is simple in structure, convenient to use, high in working efficiency and good in blocking effect, and the blast hole 16 is automatically blocked.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (9)
1. A blocking device for blocking a semi-automatic blast hole for tunneling blasting is characterized by comprising an automatic filling barrel, wherein an inner cavity of the automatic filling barrel is sequentially divided into a push rod air cavity, a rod returning air cavity and a mud storage cavity along the length direction, the rod returning air cavity and the mud storage cavity are divided by a partition wall, the push rod air cavity and the rod returning air cavity are divided by one end of a piston type push-pull structure, one end of the piston type push-pull structure is axially movably mounted on two opposite inner walls of the automatic filling barrel, and the other end of the piston type push-pull structure is axially movably mounted on two opposite inner walls of the mud storage cavity; one end of the automatic filling cylinder is connected with a mud outlet pipe communicated with the mud storage cavity through a first one-way valve; a mud inlet pipe and an air inlet pipe are arranged on one side of the automatic filling cylinder at intervals, and the mud inlet pipe can be communicated with the mud storage cavity through a second one-way valve; install the tuber pipe on one side bottom of automatic barrel of packing, the first end of tuber pipe communicate in push rod air chamber, the second end communicate in move back the pole air chamber, the air-supply line pass through three-phase switch connect in the third end at tuber pipe middle part.
2. The plugging device for semi-automatic bore plugging of a tunneling blast according to claim 1, wherein said automatic charging barrel is made of high-strength steel.
3. The device for blocking the semi-automatic shot hole blocking of the tunneling blasting according to claim 1, wherein the mud discharging pipe is a rubber hose, has a diameter smaller than that of the shot hole, and is in threaded connection with the mud discharging end of the automatic charging barrel.
4. The device as claimed in claim 1, wherein the mud inlet pipe is a rubber hose and has a plurality of mud inlet holes, and is in threaded connection with the mud inlet end of the automatic charging barrel.
5. The plugging device for the semi-automatic bore plugging of the tunneling blasting according to claim 1, wherein the piston type push-pull structure is an i-shaped structure, and both ends of the piston type push-pull structure are movably connected to the inner wall of the automatic charging cylinder through sealing rubber.
6. The plugging device for the semi-automatic blasthole plugging of the tunneling blasting according to claim 1, wherein two pressure relief valves are installed on the other outer side wall of the automatic filling cylinder at intervals, and the pressure relief valves are connected with the automatic filling cylinder in a sealing manner and are located between the end of the automatic filling cylinder and the partition wall.
7. The device of claim 1, wherein the first end of the air pipe is in threaded sealing connection with the automatic charging barrel, the second end of the air pipe is in threaded sealing connection with the automatic charging barrel, and the third end of the air pipe is in threaded sealing connection with the air inlet pipe.
8. The plugging device for semi-automatic blasthole plugging of a tunneling blast of claim 1, wherein said blast pipe is a blast pipe of a gas-leg rock drill.
9. The device for blocking the semi-automatic blast hole for the tunneling blasting according to claim 1, wherein two triangular supports are fixedly arranged at intervals at the bottom of the automatic filling cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110503490.7A CN113340167A (en) | 2021-05-10 | 2021-05-10 | A block up device that is used for semi-automatic big gun hole of tunnelling blasting to block up |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110503490.7A CN113340167A (en) | 2021-05-10 | 2021-05-10 | A block up device that is used for semi-automatic big gun hole of tunnelling blasting to block up |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113340167A true CN113340167A (en) | 2021-09-03 |
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ID=77470219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110503490.7A Pending CN113340167A (en) | 2021-05-10 | 2021-05-10 | A block up device that is used for semi-automatic big gun hole of tunnelling blasting to block up |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113340167A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005330712A (en) * | 2004-05-20 | 2005-12-02 | Fudo Constr Co Ltd | Classifying device and method |
| CN202255146U (en) * | 2011-06-20 | 2012-05-30 | 重庆工程职业技术学院 | Stemming forming device |
| CN207159982U (en) * | 2017-08-21 | 2018-03-30 | 重庆水利电力职业技术学院 | Mud sample sampling device is used in detection |
| JP6370954B1 (en) * | 2017-03-29 | 2018-08-08 | アイレック技建株式会社 | Digging machine used for mud type propulsion method |
| CN108748616A (en) * | 2018-08-06 | 2018-11-06 | 程智道 | A kind of special stemming extrusion molding apparatus of iron mouth maintenance |
| CN209538725U (en) * | 2018-12-30 | 2019-10-25 | 吴福冠 | Cement grout device |
| CN112760438A (en) * | 2021-01-29 | 2021-05-07 | 山西晋南钢铁集团有限公司 | Automatic mud loading device for blast furnace mud gun |
-
2021
- 2021-05-10 CN CN202110503490.7A patent/CN113340167A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005330712A (en) * | 2004-05-20 | 2005-12-02 | Fudo Constr Co Ltd | Classifying device and method |
| CN202255146U (en) * | 2011-06-20 | 2012-05-30 | 重庆工程职业技术学院 | Stemming forming device |
| JP6370954B1 (en) * | 2017-03-29 | 2018-08-08 | アイレック技建株式会社 | Digging machine used for mud type propulsion method |
| CN207159982U (en) * | 2017-08-21 | 2018-03-30 | 重庆水利电力职业技术学院 | Mud sample sampling device is used in detection |
| CN108748616A (en) * | 2018-08-06 | 2018-11-06 | 程智道 | A kind of special stemming extrusion molding apparatus of iron mouth maintenance |
| CN209538725U (en) * | 2018-12-30 | 2019-10-25 | 吴福冠 | Cement grout device |
| CN112760438A (en) * | 2021-01-29 | 2021-05-07 | 山西晋南钢铁集团有限公司 | Automatic mud loading device for blast furnace mud gun |
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Application publication date: 20210903 |