LU501464B1 - Novel wet spraying machine for underground coal mines - Google Patents
Novel wet spraying machine for underground coal mines Download PDFInfo
- Publication number
- LU501464B1 LU501464B1 LU501464A LU501464A LU501464B1 LU 501464 B1 LU501464 B1 LU 501464B1 LU 501464 A LU501464 A LU 501464A LU 501464 A LU501464 A LU 501464A LU 501464 B1 LU501464 B1 LU 501464B1
- Authority
- LU
- Luxembourg
- Prior art keywords
- concrete
- stirring
- batching
- spraying machine
- pump
- Prior art date
Links
- 238000005507 spraying Methods 0.000 title claims abstract description 40
- 239000003245 coal Substances 0.000 title claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 61
- 239000004567 concrete Substances 0.000 claims abstract description 59
- 238000005086 pumping Methods 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 238000007599 discharging Methods 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 abstract description 8
- 238000002156 mixing Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 37
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000004568 cement Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011378 shotcrete Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Remote Sensing (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The present disclosure discloses a novel wet spraying machine for underground coal mines. The wet spraying machine comprises a batching mechanism, a stirring mechanism, a pumping mechanism and a spraying mechanism, wherein the batching mechanism, the stirring mechanism, the pumping mechanism and the spraying mechanism are connected in sequence; the batching mechanism is a mechanism for mixing raw materials; the stirring mechanism comprises a spiral stirring shaft; spiral pushing blades and stirring blades are arranged on the spiral stirring shaft; the pumping mechanism is used for pushing concrete to the spraying mechanism; and the spraying mechanism is used for mixing the concrete and a liquid accelerator and spraying the concrete under the action of compressed air. According to the wet spraying machine, the spiral pushing blade and the stirring blade are arranged on the spiral stirring shaft, so that continuous stirring operation is realized, the stirring is more sufficient and the stirring effect is ideal.
Description
BL-5411
LU501464
NOVEL WET SPRAYING MACHINE FOR UNDERGROUND COAL MINES
[01] The present disclosure relates to concrete wet type guniting equipment for underground coal mines, and particularly relates to a stirring device of a wet spraying machine.
[02] In the tunnel construction of railways and highways, the mixer truck is used to transport to the construction site for shotcrete operation. The shotcrete site for underground tunnel excavation is generally about 1,000 meters underground, and it is not economical for other equipment to transport commercial concrete to the underground. Concrete mixers that can be used for on-site mixing are for loading materials and stirring, and discharging intermittently, therefore, these mixers can only supply materials to the pumping device of the concrete wet spraying machine intermittently.
[03] The present disclosure aims to provide a novel wet spraying machine for underground coal mines. The wet spraying machine can be used to continuously mix concrete raw materials.
[04] In order to achieve the above object, the present disclosure adopts the following technical solutions:
[05] A novel wet spraying machine for underground coal mines comprises a batching mechanism, a stirring mechanism, a pumping mechanism, wherein the batching mechanism, the stirring mechanism, the pumping mechanism are connected in sequence; the batching mechanism is a mechanism for mixing raw materials; the stirring mechanism comprises a spiral stirring shaft; spiral pushing blades and stirring blades are arranged on the spiral stirring shaft, and the pumping mechanism is a mechanism used for spraying the concrete.
[06] The batching mechanism comprises at least two batching hoppers, and two discharging ports are formed in the lower part of each batching hopper in a staggered manner and communicated through screw pairs.
[07] There are two batching hoppers, the discharging ports in the lower parts of the batching hoppers are the same in size; and the two screw pairs are the same in size and are driven by a first motor and a second motor to rotate respectively, and a screen is arranged on the upper part of the batching hopper.
[08] The stirring mechanism further comprises a U-shaped groove, an inclined support frame and a water supply component; the upper part of the U-shaped groove is connected with the support frame, a spiral stirring shaft is arranged in the U-shaped groove; and the water supply component is arranged above the U-shaped groove. The
U-shaped groove and the water supply component form an inclined conveying pipe, and the conveying pipe is provided with a feeding port and a discharging port.
BL-5411
LU501464
[09] The spiral pushing blades and the stirring blades on the spiral stirring shaft are alternately arranged, the stirring blades are erected on the spiral stirring shaft in a columnar mode, and the spiral stirring shaft is driven by a third motor to rotate. The
U-shaped groove is made of rubber sheet, the spiral pushing blades and the stirring blades are provided with wear-resistant lining plates capable of being detached and replaced. The front part of the U-shaped groove is connected with a shaft seat on the support frame through a rotating shaft, and the rear part is connected with the support frame through a hydraulic cylinder. The water supply component comprises a plurality of adjusting water valves, and the adjusting water valves are evenly distributed on the upper portion of the conveying pipe.
[10] The pumping mechanism comprises two main oil cylinders alternately doing push-pull actions, concrete cylinders connected with the two main oil cylinders respectively, and a hopper, wherein the concrete cylinders are communicated with the hopper; an S pipe capable of being alternately communicated with the two concrete cylinders is arranged in the hopper; the S pipe is driven by a oscillating cylinder; and the main oil cylinders and the oscillating cylinder are controlled in a hydraulic control mode.
[11] The wet spraying machine further comprises a spraying mechanism, the spraying mechanism is provided with a concrete pumping hose, a main gas pipeline and a secondary gas pipeline, wherein one end of the concrete pumping hose is communicated with the concrete conveying steel pipe, and the other end of the concrete pumping hose is connected with a nozzle; an underground gas source is communicated with the concrete pumping hose through the main gas pipeline; the secondary gas pipeline is a branch of the main gas pipeline, and a gas storage tank, a pneumatic triple piece and a pneumatic accelerator pump are sequentially connected to the secondary gas pipeline and finally connected back to the main gas pipeline.
[12] The wet spraying machine further comprises a hydraulic control device, wherein the hydraulic control device is provided with two groups of double pumps; one pump of the first group of double pumps is connected with a first motor, a second motor and a hydraulic cylinder, and the other pump of the first group of double pumps is connected with a third motor; and one pump of the second group of double pumps is connected with a driving motor of a stirrer; and the other pump of the second group of double pumps is a power source of the pumping mechanism.
[13] The present disclosure has the following beneficial effects:
[14] 1, spiral pushing blades and stirring blades are arranged on a spiral stirring shaft, and the continuous operation of stirring is realized.
[15] 2, the concrete raw materials can complete the automatic batching by regulating the rotating speed of a spiral pair arranged under each batching hopper to rotate according to a certain proportion.
[16] 3, wear-resistant lining plates capable of being dismounted and replaced are respectively arranged on the spiral pushing blades and the stirring blades, and the wear-resistant lining plates can be replaced.
[17] 4, an adjusting water valve arranged at the upper part of a conveying pipe 1s used for flexibly regulating the flow rate.
BL-5411
LU501464
[18] 5, a discharging port formed in the lower part of each batching hopper is communicated with a feeding port of the conveying pipe in a sealed way, and the cement flying can be effectively prevented.
[19] 6, main oil cylinders and an oscillating cylinder are respectively controlled in a hydraulic control mode, and the anti-explosion problem of an electric control hydraulic control mode is solved.
[20] 7, the front part of a U-shaped groove is connected with a shaft seat arranged on a support frame through a rotating shaft, the rear part of the U-shaped groove is connected with the support frame through a hydraulic cylinder, and the conveying pipe can be conveniently cleaned. And
[21] 8, the rear end of each batching hopper is connected with the shaft seat arranged at the rear end of the conveying pipe through the rotating shaft, the front end of each batching hopper is connected with the conveying pipe through a movable limiting clamp, and the cleaning is simple and convenient.
[22] FIG 1 is a structural schematic view of a novel wet spraying machine for underground coal mines.
[23] FIG 2 is a structural schematic view of a batching mechanism.
[24] FIG 3 is a sectional view of a batching mechanism.
[25] FIG 4 is a sectional view of a stirring mechanism.
[26] FIG 5 is a structural schematic view of a spiral stirring shaft.
[27] FIG 6 is a sectional view of a pumping mechanism.
[28] FIG 7 is a top view of a pumping mechanism.
[29] FIG 8 is a connecting block diagram of a spraying mechanism.
[30] FIG 9 is a schematic view of hydraulic control.
[31] The present disclosure is further described below in conjunction with accompanying drawings.
[32] A novel wet spraying machine for underground coal mines comprises a batching mechanism 1, a stirring mechanism 2, a pumping mechanism 3 and a spraying mechanism, wherein the batching mechanism 1, the stirring mechanism 2, the pumping mechanism 3 and the spraying mechanism are connected in sequence; the batching mechanism 1 is a mechanism for mixing raw materials, the stirring mechanism 2 comprises a spiral stirring shaft 201; spiral pushing blades 202 and stirring blades 203 are arranged on the spiral stirring shaft 201; the pumping mechanism is used for pushing concrete to the spraying mechanism; and the spraying mechanism is used for mixing the concrete and a liquid accelerator and spraying the concrete under the action of compressed air.
[33] The batching mechanism 1 comprises two batching hoppers 101, wherein a screen 1s arranged at the upper part of each batching hopper 101, two discharging ports 102 are formed in the lower part of each batching hopper 101 in a staggered manner and communicated through screw pairs 103; the discharging ports 102 in the lower parts of
BL-5411
LU501464 the batching hoppers 101 are the same in size; and the two screw pairs 103 are the same in size and are driven by a first motor and a second motor to rotate respectively.
[34] The stirring mechanism 2 further comprises a U-shaped groove 204 made of a rubber plate; a support frame 205 and a water supply component 206, wherein the support frame 205 is in an inclined state; the front part of the U-shaped groove 204 is connected with a shaft seat on the support frame 205 through a rotating shaft, and the rear part is connected with the support frame 205 through a hydraulic cylinder 207; a spiral stirring shaft 201 is arranged in the U-shaped groove 204; and the water supply component 206 is arranged above the U-shaped groove 204. The U-shaped groove 204 and the water supply component 206 form an inclined conveying pipe provided with a feeding port and a discharging port. The rear ends of the batching hoppers 101 are connected with the shaft seat at the rear end of the conveying pipe through the rotating shaft, and the front ends are locked with the conveying pipe through movable limiting clamps; and the discharging ports 102 in the lower parts of the batching hoppers 101 are communicated with the feeding port of the conveying pipe in a closed manner.
[35] The spiral pushing blades 202 and the stirring blades 203 on the spiral stirring shaft 201 are alternately arranged, the stirring blades 203 are erected on the spiral stirring shaft 201 in a columnar mode, and the spiral stirring shaft 201 is driven by a third motor to rotate. The spiral pushing blades 202 and the stirring blades 203 are provided with wear-resistant lining plates capable of being detached and replaced. The water supply component 206 comprises a plurality of adjusting water valves, and the adjusting water valves are evenly distributed on the upper portion of the conveying pipe.
[36] The pumping mechanism 3 comprises two main oil cylinders 301 alternately doing push-pull actions, concrete cylinders 302 connected with the two main oil cylinders 301 respectively, and a hopper 303, wherein the concrete cylinders 302 are communicated with the hopper 303; an S pipe 304 capable of being alternately communicated with the two concrete cylinders 302 is arranged in the hopper 303; the S pipe 304 is driven by a oscillating cylinder; and the main oil cylinders and the oscillating cylinder are controlled in a hydraulic control mode. A stirrer is arranged in the hopper 303, a screen is arranged above the hopper 303, the S pipe 304 is connected with the spraying mechanism, and the discharging port of the conveying pipe right faces the screen. A concrete conveying steel pipe 305 connected through a hinge shaft is arranged at the front end of the hopper 303, and the front end of the concrete conveying steel pipe 305 is connected with a concrete pump hose 401 through a quick pipe clamp.
[37] The spraying mechanism 4 is provided with a concrete pumping hose 401, a main gas pipeline and a secondary gas pipeline, wherein one end of the concrete pumping hose 401 is communicated with the concrete conveying steel pipe 305, and the other end of the concrete pumping hose 401 is connected with a nozzle; an underground gas source is communicated with the concrete pumping hose 401 through the main gas pipeline; the secondary gas pipeline is a branch of the main gas pipeline, and a gas storage tank 402, a pneumatic triple piece 403 and a pneumatic accelerator pump 404 are sequentially connected to the secondary gas pipeline and finally connected back to the main gas pipeline.
BL-5411
LU501464
[38] It should be further described in detail for the spraying mechanism 4 that, compressed air of the underground gas source is connected with the main gas pipeline through a mining K-shaped connector, and a liquid accelerator is pumped into the main gas pipeline through the pneumatic accelerator pump 404 of the secondary gas pipeline 5 and then communicated with the concrete pumping hose 401 and the concrete nozzle through the K-shaped connector.
[39] The novel wet spraying machine for underground coal mines further comprises a hydraulic control device, wherein the hydraulic control device is provided with two groups of double pumps; one pump 2001 of the first group of double pumps is connected with a first motor, a second motor and a hydraulic cylinder, and the other pump 3001 of the first group of double pumps is connected with a third motor; and one pump 4001 of the second group of double pumps is connected with a driving motor of a stirrer; and the other pump 5001 of the second group of double pumps is a power source of the pumping mechanism.
[40] The accelerator pump of the present disclosure adopts a pneumatic reciprocating pumping device so that the explosion-proof problem of an electric power pump is effectively solved.
[41] The screw pairs, the spiral stirring shaft and the stirrer can control forward rotation or reverse rotation and the rotating speed as required.
[42] The control mode of the hydraulic control device 1s described with reference to FIG 9.
[43] According to the hydraulic control device, two explosion-proof motors drive two groups of double pumps, a quantitative pump (pump 4001) is adopted for driving the stirrer in the hopper 303, and variable pumps are adopted for speed adjustment of all working devices.
[44] The pump 2001 provides power for the screw pairs 103 and the hydraulic cylinder 207, two batching hoppers 101 are driven by the first motor 23 and the second motor 24 in series, two oil cylinders 26 and 26' are connected in parallel, a manual reversing valve 25 controls a lifting oil cylinder of the hydraulic cylinder 207, and a manual reversing valve 22 controls proportioning motors (the first motor 23 and the second motor 24).
[45] The pump 3001 is a power source of the third motor 21.
[46] The pump 4001 is a power source of the driving motor 19 of the stirrer, and manual reversing valves 20 and 18 are control devices of the two motors.
[47] The pump 5001 is a power source of the pumping mechanism. The manual reversing valve 6 plays a role in controlling the starting and stopping of a positive pump and the starting and stopping of a negative pump. The manual reversing valve 6 is switched to a right position to start the positive pump; if a hydraulic reversing valve 7 is also at the right position, pressure oil enters a head port of an oil cylinder 15 to push a piston rod to extend out (push out concrete), and meanwhile, a piston rod of an oil cylinder 15' retracts (suck in the concrete); when the piston rod of the oil cylinder 15 extends to the front end of the oil cylinder, a two-way cartridge valve assembly 12 arranged at the front end sends out a pressure signal, the pressure signal controls a hydraulic reversing valve 8 to be switched to the right position, and at the moment, a
BL-5411
LU501464 swinging oil cylinder 16' swings rightwards; when the swinging 1s about to be finished, a pressure signal is sent out again to control the reversing valve 7 to be switched to a left position, at the moment, the pressure oil enters the head port of the oil cylinder 15" to push the piston rod to extend out (push out the concrete), and meanwhile, the piston rod of the oil cylinder 15' retracts (suck in the concrete); when the piston rod of the oil cylinder 15' extends to the front end of the oil cylinder, the two-way cartridge valve assembly 12' arranged at the front end sends out a pressure signal, the pressure signal controls the hydraulic reversing valve 8 to be switched to the left position, and at the moment, the swinging oil cylinder 16' swings rightwards; and when the swinging is about to be finished, a pressure signal is sent out again to control the reversing valve 7 to be switched to the right position, therefore, a cyclic action of pushing out the concrete is finished, and a next cyclic action is started.
[48] The principle of the two-way cartridge valve assembly for sending out the pressure signal is that when an oil cylinder piston does not move to an end point, the control pressure of the upper end and the lower end of a two-way cartridge is equal, a valve port is closed by the area difference, and no signal is sent out; when the piston moves to the end point, the pressure of the upper end of the two-way cartridge is smaller than the pressure of the lower end of the two-way cartridge, the cartridge is opened, and the control pressure signal is sent out. Throttling ports 13 and 14 and a one-way valve 11 play a role in reducing reversing impact.
[49] One-way valves 9 and 9' play a role in removing the back pressure of the hydraulic reversing valve 8 to enable the hydraulic reversing valve 8 to be quickly reversed when the hydraulic reversing valve 8 is reversed. A one-way throttling valve 10 can play a role in relieving the impact when one oil cylinder moves to the end point of a head port. A cylinder 17 connected to two oscillating cylinders 16 and 16' in parallel is a piston of a lubricating grease pump and can provide lubricating oil for the part, needing to be lubricated, of the wet spraying machine.
[50] Overflow valves 27, 28, 29 and 30 are used for regulating the pressure of respective systems, pressure gauges 31, 32, 33 and 34 are used for displaying respective pressure, and all return oil is connected in parallel and returns to a power station in order to reduce the number of oil pipes. An oil absorption and return oil filter is arranged in the power station and is used for filtering oil liquid, a water cooler is used for cooling the oil temperature, and cooled water is introduced into the U-shaped groove and is used for stirring concrete.
[51] The working process of the wet spraying machine for underground coal mines comprises the following steps:
[52] Cement and sand stone prepared in advance according to a proportion are loaded into the two hoppers 101 correspondingly, and by adjusting the rotating speed of the screw pairs 103 below all the batching hoppers, concrete raw materials can be precisely batched according to requirements; the prepared raw materials fall into the stirring mechanism 2 from the discharging ports 102 in the lower portions of the batching hoppers, the regulating water valve quantitatively supplies water, the spiral stirring shaft 201 is driven by the third motor to rotate, thus, water is added into the automatically-prepared raw materials for stirring, and meanwhile, stirred concrete is
BL-5411
LU501464 conveyed to the pumping mechanism 3 through spiral blades 202; and the spiral stirring shaft 201 is provided with spiral pushing blades 202 and stirring blades 203 so that the concrete is stirred more uniformly.
[53] Then, the stirred concrete falls into the hopper 303 of the pumping mechanism 3, and the stirrer performs secondary stirring on the concrete. The two main oil cylinders 301 alternately perform push-pull actions; when one main oil cylinder drives the corresponding concrete cylinder to outwards push the concrete, the S pipe 304 is communicated with the concrete cylinder, and at the moment, the other main oil cylinder drives the corresponding concrete cylinder connected with the main oil cylinder to suck in the concrete. When the outwards pushed main oil cylinder moves to a limit position, the pressure in the main oil cylinder is enough to open a valve port of the two-way cartridge valve for oil passing so that a main oil way enters and controls the oscillating cylinder to act, and at the moment, the S pipe 304 is communicated with the other concrete cylinder, and the concrete cylinder outwards pushes the concrete. The concrete is continuously sprayed out from the S pipe.
Claims (5)
1. A novel wet spraying machine for underground coal mines, comprising a batching mechanism, a stirring mechanism and a pumping mechanism, wherein the batching mechanism comprises two batching hoppers, and two staggered same discharging ports are formed in the lower part of the batching mechanism and are communicated through a screw pair, the stirring mechanism comprises a rubber U-shaped groove, an inclined support frame and a water supply component, the upper part of the U-shaped groove is connected with the support frame, a spiral stirring shaft is arranged in the U-shaped groove, and the water supply component is arranged above the U-shaped groove; blades on the spiral stirring shaft are arranged alternately, and the stirring blades are erected on the spiral stirring shaft in a columnar shape; the front part of the U-shaped groove is connected with a shaft seat on the support frame through a rotating shaft, and the rear part of the U-shaped groove is connected with the support frame through a hydraulic cylinder, and the water supply component comprises a plurality of adjusting water valves and is arranged at the upper part of a conveying pipe.
2. The novel wet spraying machine for underground coal mines according to claim 1, wherein the rear ends of the batching hoppers are connected with the shaft seat at the rear end of the conveying pipe through the rotating shaft, the front ends of the batching hoppers are locked with the conveying pipe, and the discharging ports are communicated with a feeding port of the conveying pipe in a closed manner.
3. The novel wet spraying machine for underground coal mines according to claim 2, wherein the pumping mechanism comprises two main oil cylinders, a concrete cylinder and a hopper, and the concrete cylinder is provided with an S pipe communicated with the hopper.
4. The novel wet spraying machine for underground coal mines according to claim 3, wherein the spraying mechanism comprises a concrete pumping hose, a main gas pipeline and a secondary gas pipeline, and the hose is connected with a concrete conveying steel pipe and a nozzle; the main gas pipeline is connected with an underground gas source and the concrete pumping hose; and a gas storage tank, a pneumatic triple piece, an accelerator pneumatic pump and a main gas return pipeline are sequentially connected onto the secondary gas pipeline.
5. The novel wet spraying machine for underground coal mines according to the claim 4, wherein two groups of double pumps are provided, wherein one pump of the first group of double pumps is connected with a first motor, a second motor and a hydraulic cylinder, and the other pump is connected with a third motor; and one pump of the second group of double pumps is connected with a driving motor of a stirrer, and the other pump is a power source of the pumping mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU501464A LU501464B1 (en) | 2022-02-14 | 2022-02-14 | Novel wet spraying machine for underground coal mines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU501464A LU501464B1 (en) | 2022-02-14 | 2022-02-14 | Novel wet spraying machine for underground coal mines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU501464B1 true LU501464B1 (en) | 2023-08-17 |
Family
ID=87654459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU501464A LU501464B1 (en) | 2022-02-14 | 2022-02-14 | Novel wet spraying machine for underground coal mines |
Country Status (1)
| Country | Link |
|---|---|
| LU (1) | LU501464B1 (en) |
-
2022
- 2022-02-14 LU LU501464A patent/LU501464B1/en active IP Right Grant
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101749032B (en) | Novel underground wet blasting machine of coal mine | |
| CN201610755U (en) | Novel underground wet-spraying machine used in coal mine | |
| AU2022202759A1 (en) | Mixing and pump apparatus, system and associated method | |
| AU2020103316A4 (en) | A feeding device for coal mine shotcreting machine | |
| LU501464B1 (en) | Novel wet spraying machine for underground coal mines | |
| CN102635373B (en) | High-pressure hydraulic injection system | |
| CN110540072A (en) | Anti-blocking pipe method and device for pneumatically conveying concrete mortar | |
| CN105781585B (en) | A kind of low dust-type concrete shotcrete machine | |
| CN110344596B (en) | Anti-reverse-gas enhanced pneumatic concrete conveying system | |
| CN103203804B (en) | All-hydraulic swing arm list horizontal axis forces concrete-agitating feeder | |
| CN212686679U (en) | Spiral propelling feeding system for oil sludge sand treatment | |
| CN211800363U (en) | Grouting device | |
| CN211415735U (en) | Concrete mortar mixing equipment | |
| CN112207978A (en) | Twice mixing equipment and production process thereof | |
| CN212758415U (en) | Crawler-type slurry stirring pumping vehicle | |
| CN213320873U (en) | Mortar stirring conveyor | |
| CN221053713U (en) | Novel mining wet concrete sprayer | |
| CN216172100U (en) | Airtight reinforced metering device | |
| CN212040177U (en) | Accelerator agitating unit | |
| CN219387910U (en) | Underground pneumatic guniting device | |
| CN217813501U (en) | Mining concrete slurrying whitewashing robot complete set device | |
| CN219235707U (en) | Multistage batching agitator | |
| CN219450351U (en) | Compounding and paving integrated machine | |
| CN203765804U (en) | Ingredient mixing pump | |
| CN212049602U (en) | Accelerator adds conveying system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG | Patent granted |
Effective date: 20230817 |