CN217976290U

CN217976290U - Screw type continuous grouting equipment suitable for inorganic powder material in coal mine

Info

Publication number: CN217976290U
Application number: CN202222179967.3U
Authority: CN
Inventors: 吴怀国; 魏宏亮; 刘�东; 韩澍; 马国庆; 田玉春
Original assignee: Beijing Ruinuoanke New Energy Technology Co ltd
Current assignee: Beijing Ruinuoanke New Energy Technology Co ltd
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2022-12-06
Anticipated expiration: 2032-08-18

Abstract

The utility model relates to a be suitable for colliery inorganic powder material's in pit screw continuous grouting equipment, a serial communication port, including powder unloading system, water intake system, water material mixing and stirring system, screw pump output system and screw pump actuating system, powder unloading system is used for the powder of supplying with, water intake system is used for the feed water, water material mixing and stirring system is used for mixing the stirring the powder with water forms the thick liquids, screw pump output system is used for the pump sending output the thick liquids. The powder and water are fed from the screw pump to the working position by means of direct quantity and speed control dosing, stirring and propulsion via the screw. The whole process is continuously stirred and rapidly propelled, and the water-cement ratio can be continuously allocated and accurately controlled.

Description

Screw type continuous grouting equipment suitable for inorganic powder material in coal mine

Technical Field

The utility model relates to a slip casting technical field, concretely relates to be suitable for colliery inorganic powder material's continuous slip casting technique in pit.

Background

The high-water or ultrahigh-water inorganic powder material is a novel material widely applied in the underground safe and efficient production of coal mines, and is characterized in that the material is prepared from inorganic materials such as ordinary portland cement, sulphoaluminate cement, aluminate cement, gypsum, lime and the like, and is different from the traditional ordinary portland cement material which can only be mixed and used in a small water-cement ratio (less than or equal to 1. Different water-cement ratios have different strength properties, and the underground application of the coal mine is different. The method can be used for constructing a gob-side entry retaining supporting wall body during underground coal pillar-free mining; can also be used for constructing a cylindrical supporting body of the supporting column; the method can also be used for grouting consolidation of falling bodies in small kiln areas encountered in the underground; or can be used for the integral filling of underground waste roadways; and can be used for the functions of grouting and fire extinguishing in a spontaneous combustion area behind an underground working face frame, and the like, so the application is very wide.

The general downhole application method is: and (3) preparing a slurry stirring and preparing barrel on site, and pouring the slurry stirring and preparing barrel into a slurry injecting barrel of a slurry injecting pump to implement slurry injecting operation with different functions. The underground on-site construction method has the following defects: 1) Slurry is required to be prepared on site according to the determined water-cement ratio, and inaccuracy of manual control of the water-cement ratio exists; 2) The process is not simple enough, the slurry needs to be prepared first and then grouting is carried out by adopting a grouting pump, the process is intermittent operation, and the slurry needs to have certain working time to keep the viscosity change of the slurry unobvious so as to ensure that grouting is carried out smoothly. However, when the slurry is prepared, the cement-based material begins to react with water to a different extent. Therefore, it is necessary to grasp the total amount of the slurry to be dispensed and the dispensing time for keeping the slurry stable in fluidity according to the estimated amount of the on-site grouting and the grouting speed, which is difficult to control technically.

Meanwhile, in many cases in the underground, when grouting is required, after the slurry is injected to a specific construction point, the slurry is solidified quickly (short solidification time), which brings about a conflict problem between distribution time when the slurry needs proper fluidity and solidification time after grouting.

Therefore, many of these products are converted into two-component packaging, wherein separate grouting of the two components is performed and mixing of the slurry is performed at the point of grouting. However, such formulation modifications may cause problems in material formulation properties, for example, in order to separate a single component into two components (usually two components in a weight ratio of 1.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

In view of the above shortcoming, the not enough of prior art, the utility model provides a grouting equipment that can be adapted to the great scope water-cement ratio of high water class material, continuity slip casting can accurate controllable water-cement ratio, limit rapid mixing, limit continuous output slip casting as required.

(II) technical scheme

In order to achieve the above object, the utility model discloses a main technical scheme include:

the screw type continuous grouting equipment suitable for inorganic powder materials in a coal mine is characterized by comprising a powder blanking system, a water inlet system, a water-material mixing and stirring system, a screw pump output system and a screw pump driving system, wherein the powder blanking system is used for supplying powder, the water inlet system is used for supplying water, the water-material mixing and stirring system is used for mixing and stirring the powder and the water to form slurry, and the screw pump output system is used for pumping and outputting the slurry.

The powder blanking system comprises a powder storage bin, an auger screw for conveying powder and a stepless speed regulator for regulating the rotating speed of the auger screw.

The water inlet system comprises a water supply pipeline, a water inlet adjusting device is arranged on the pipeline, and the tail end of the pipeline comprises a water sprayer.

The water sprayer is arranged between the inlet of the water-material mixing and stirring bin and the outlet of the blanking system.

The water sprayer comprises a connector and a rectangular frame part, wherein the rectangular frame part comprises a plurality of fine water spraying holes which are circumferentially arranged and a central channel for powder to pass through

The water inlet adjusting device comprises a flow meter, a Y-shaped filter and a water inlet valve.

The water and material mixing and stirring system comprises a stirring bin with an upward opening and a propelling screw positioned below the stirring bin.

The propelling screw is connected with a main driving motor, and reinforcing steel bar stirring teeth with different intervals are arranged on the periphery of the screw.

The screw pump driving system comprises a motor and a speed reducer and is used for driving the propelling screw and the screw pump.

(III) advantageous effects

The technical effects of the utility model lie in: the powder and water are fed from the screw pump to the working position by means of direct quantity-controlled, speed-controlled dosing, stirring and propulsion via the screw. The whole process is continuously stirred and rapidly propelled, and the water-cement ratio can be continuously allocated and accurately controlled. The mixing of a single powder with water eliminates the need for two-component dispensing, thereby avoiding the introduction of ingredients that lose strength.

Drawings

Fig. 1 is a side view of the general assembly drawing of grouting equipment of the present invention.

Fig. 2 shows a bottom view of a schematic of the structure of the sprinkler of the water intake system.

Fig. 3 shows a side view of a schematic of the structure of the water and material mixing and stirring system.

Fig. 4 shows a top view of a schematic of the structure of the water-material mixing and stirring system.

Detailed Description

For a better understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings.

Fig. 1 shows the general assembly diagram of the grouting equipment of the present invention. The grouting equipment comprises a powder discharging system 1, a water inlet system 2, a water-material mixing and stirring system 3, a screw pump output system 4 and a screw pump driving system 5.

The powder blanking system 1 comprises a powder storage bin 11, a stepless speed regulator 12 for regulating the blanking speed of powder and an auger screw 13 for conveying powder. Wherein the internal volume of the powder bin is about to hold two bags (25 kg/bag) of powder; the feeding auger conveying screw in the storage bin has a dustproof structure for preventing powder from entering bearings in two ends of the screw in continuous operation.

The blade interval of the screw 13 of the auger is 60-90mm, it is confirmed on the basis of theoretical calculation and experimental verification that the powder and water are not mixed well rapidly and the slurry is not pushed well when the screw exceeds the range, the feeding speed (kilogram per minute) of the powder is adjusted by matching with the stepless speed regulator 12 for adjusting the rotating speed of the screw of the auger, the feeding speed of the powder is adjusted within an adjustable range, and the water-cement ratio is large in range.

The water inlet system 2 comprises a water supply pipeline, a water inlet adjusting device 21 is arranged on the pipeline, and the tail end of the pipeline comprises a water sprayer 22 which is arranged between the inlet of the water and material mixing and stirring bin 3 and the outlet of the blanking system 1. The water inlet control device 21 comprises a precise flow meter, a Y-shaped filter and a water inlet valve and is used for adjusting the water inlet amount and the water inlet speed of system water.

Fig. 2 shows a bottom view of a schematic of the structure of the water jet 22 of the water intake system 2. The sprinkler 22 in fig. 2 comprises a connection head 23 and a rectangular frame 24. The rectangular frame 24 defines an annular internal cavity and forms a central passage in the centre for the powder to pass through. The annular connector 23 comprises a tubular structure adapted to fit a conduit for supplying water, the inner bore of the tubular structure communicating with the interior cavity of the rectangular frame portion. The rectangular frame 24 has an outer length and width dimension of about 350 x 260mm, a central channel dimension of about 210 x 180mm, and a box wall thickness of about 1mm when viewed from the bottom. The bottom surface of the rectangular frame 24 comprises an annular bottom wall 26 sloping outwardly and upwardly from the central channel at an angle of 45 ° to the bottom horizontal plane. At the position where the annular bottom wall 26 is close to the central passage, fine water jet holes 25 are uniformly arranged in the circumferential direction, and the water jet holes 25 vertically penetrate through the annular bottom wall 26, so that the water in the inner cavity can be jetted out from the water jet holes 25 at an angle of 45 degrees downwards and outwards. The diameter of the water spray hole is about 2mm. The rectangular frame is arranged in the middle of the upper part of the water and material mixing and stirring bin 3, so that after external water enters the water sprayer through the flowmeter, the water is sprayed into the middle of the stirring bin in a dispersing manner around the bottom of the inner edge of the water sprayer, and meanwhile, the blanking port of the powder material just falls into the stirring bin through the central channel at the central position of the upper part of the stirring bin, so that the water and the powder material are contacted in the stirring bin and are more uniformly mixed, and the subsequent distribution in a uniformly mixed state is facilitated. The measuring range of the flowmeter is 0-200L/min.

Fig. 3 shows a side view of a schematic of the structure of the water-material mixing and stirring system. Fig. 4 shows a top view of a schematic of the structure of the water-material mixing and stirring system. It can be seen that the water-material mixing and stirring system 3 comprises a powder and water mixing and stirring chamber 31 with an upward opening (inlet), and a powder and water rapid stirring and slurry propelling screw 32 located below the powder and water mixing and stirring chamber 31.

Powder and water rapid mixing and thick liquids impel screw rod 32 and connect main driving motor, and the screw rod is provided with the reinforcing bar stirring tooth of different intervals all around, and the rapid mixing of realization water and powder is rotated fast under the drive of main driving motor, and thick liquids rapid mixing exports through the screw pump body 6 of connecting down simultaneously, and the length of time preference control that the material was exported through the screw pump body 6 is about 1-2 seconds. The rotation speed of the main driving screw is 450-500 rpm so as to obtain good effective mixing of the powder and the water, thereby controlling the application performance of the slurry to be optimal.

The screw pump driving system 5 comprises a motor and a speed reducer, wherein the power of the motor is about 7.5kW, and the screw pump driving system is an explosion-proof motor. Meanwhile, the powder and water are driven to be rapidly stirred and the slurry is driven to advance the screw rod 3 and the screw pump 6.

The screw pump output system 6 is a screw pump comprising a rotor and a rubber stator, the stator constitutes a casing of the screw pump, and the rotor is positioned in the stator. The rotor of the screw pump is directly connected with the powder and water rapid stirring and slurry propelling screw 32 through a universal joint. The screw pump is of a 3-stage or 4-stage structure, and the specification of the screw can be G50-G70. The output pressure is generally about 5 to 7 MPa.

With the aid of the utility model discloses a grouting equipment, the powder contacts and mixes with water in stirring the storehouse, under propulsion screw's stirring and impetus to the speed delivery of ideal exports to the screw pump, satisfies the needs of high water class material continuity slip casting, realizes the ration with single form powder and water mixture, has avoided adding the joining of the composition that is unfavorable for curing strength.

The last of these should be mentioned: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The screw type continuous grouting equipment suitable for inorganic powder materials in a coal mine is characterized by comprising a powder blanking system, a water inlet system, a water-material mixing and stirring system, a screw pump output system and a screw pump driving system, wherein the powder blanking system is used for supplying powder, the water inlet system is used for supplying water, the water-material mixing and stirring system is used for mixing and stirring the powder and the water to form slurry, and the screw pump output system is used for pumping and outputting the slurry.

2. Grouting equipment according to claim 1, characterised in that the powder blanking system comprises a powder silo, an auger screw for powder transport and a stepless speed regulator for regulating the rotational speed of the auger screw.

3. Grouting equipment as claimed in claim 1, characterised in that the water inlet system comprises a pipe for water supply, in which a water inlet regulating device is arranged, and in which the end of the pipe comprises a water sprayer.

4. Grouting equipment according to claim 3, characterised in that the water jet is arranged between the inlet of the water-material mixing and stirring silo and the outlet of the blanking system.

5. The grouting device of claim 3, wherein the water sprayer comprises a connector and a rectangular frame portion, the rectangular frame portion comprising a plurality of fine water spray holes arranged circumferentially and a central passage for powder to pass through.

6. Grouting equipment according to claim 3, characterised in that the inflow regulating means comprise a flow meter, a Y-filter and an inflow valve.

7. The grouting equipment of claim 1, wherein the water-material mixing and stirring system comprises a stirring bin with an upward opening and a propelling screw positioned below the stirring bin.

8. The grouting equipment of claim 7, wherein the propelling screw is connected with a main driving motor, and reinforcing steel bar stirring teeth with different intervals are arranged on the periphery of the propelling screw.

9. Grouting equipment according to claim 1, characterised in that the screw pump drive system comprises a motor and a reducer for driving the propulsion screw and the screw pump.