Pneumatic slurry agitator

Abstract

The application belongs to the technical field of mine mixers. A kind of pneumatic slurry mixer, including stirring barrel, stirring shaft, drive part, feed part and discharge part;Stirring shaft is arranged in the stirring barrel, and main stirring blade is arranged on the stirring shaft, and multiple secondary stirring blades are arranged on the inner wall of the stirring barrel, and the main stirring blade and the secondary stirring blade are staggered arrangement;Drive part is used to drive the stirring shaft to act;Feed part is arranged in the upper portion of the stirring barrel;Discharge part is arranged in the side portion of the stirring barrel.The application can not cause cement slurry to precipitate in long-term operation process, and the stirring effect is good, slurry is easy to transfer, can meet the requirements of coal mine site grouting operation, and can be used in flammable and explosive, strong magnetic, radiation, dusty and other occasions, suitable for coal mine underground operation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mine mixer, and particularly relates to a pneumatic slurry mixer. BACKGROUND

[0002] The coal mine plant area causes the change of geological structure due to the mining activity, forms the collapse, fracture, loose of stratum, greatly changes the underground water system, in order to prevent the further penetration and diffusion of the contaminated underground water, causes the pollution to the surrounding area, in the mine water plugging, slurry making and grouting operation, according to different geological conditions, different application sites, different slurry making and grouting equipment need to be used, the configured cementitious material slurry is pressed into the gap, fracture broken zone in the aquifer, aquiclude and the like, and is diffused and consolidated, so as to block the water passage, fill the water containing gap, increase the geological strength, and play the role of water isolation and water resistance.

[0003] At present, the research and practice of the slurry mixing technology in the field of mine water plugging and slurry making at home and abroad are still in the initial stage. The mixer can be divided into single-shaft mixer and double-shaft mixer according to the number of stirring shafts; and can be divided into electric mixer and pneumatic mixer according to the driving mode. The single-shaft mixing equipment is not uniform in mixing, cannot guarantee the quality of the slurry, and has poor stability, and is prone to overturning when applied to slopes and the like. A pneumatic mixer with a mixing device suitable for long-distance grouting in a rail tunnel mainly solves the problem of inconvenient on-site installation of the mixer, and the problem that the grouting equipment is not matched with the mixing device. The double-shaft horizontal mixer mainly solves the problem of uneven single-shaft mixing, but shares one feeding and discharging port and is driven by double motors, and is not suitable for mine grouting operation. The existing cement mixing equipment cannot meet the requirements of grouting operation in different application sites, and most of the work is completed by manpower. The cement mixer commonly used in coal mines has only one stirring shaft for stirring when mixing cement, and the cement slurry is prone to sedimentation and clumping, which may cause pipe blockage during grouting, greatly affecting the efficiency of water plugging and filling grouting. SUMMARY

[0004] The present application aims at the above-mentioned problems and deficiencies, and provides a pneumatic slurry mixer which can prevent cement slurry from sedimentation during long-term operation, has good mixing effect, and can meet the requirements of coal mine site grouting operation, and can be used in flammable and explosive, strong magnetic, radiation and dusty environments, and is suitable for coal mine operation.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted is:

[0006] A pneumatic slurry mixer, comprising:

[0007] A stirring cylinder;

[0008] a stirring shaft arranged in the stirring cylinder body, a main stirring blade arranged on the stirring shaft, and a plurality of secondary stirring blades arranged on the inner wall of the stirring cylinder body, the main stirring blades and the secondary stirring blades being staggered;

[0009] a driving part for driving the stirring shaft to act;

[0010] a feeding part arranged at the upper portion of the stirring cylinder body; and

[0011] a discharging part arranged at the side portion of the stirring cylinder body.

[0012] According to the pneumatic slurry mixer, preferably, the bottom of the stirring cylinder body is provided with a base plate, and an adjusting unit is arranged between the base plate and the stirring cylinder body, the adjusting unit being used for adjusting the placement angle of the stirring cylinder body.

[0013] According to the pneumatic slurry mixer, preferably, one side of the stirring cylinder body is hinged to the base plate, and the adjusting unit is arranged at the other side of the stirring cylinder body and the base plate, the adjusting unit comprising:

[0014] a vertical plate arranged on the base plate, the lower end of the vertical plate being hinged to the base plate;

[0015] a plurality of clamping grooves arranged at intervals along the length direction of the vertical plate; and

[0016] a clamping column arranged on the side wall of the stirring cylinder body, the clamping column being arranged corresponding to the clamping grooves.

[0017] According to the pneumatic slurry mixer, preferably, at least two groups of main stirring blades are arranged vertically on the stirring shaft, a secondary stirring blade is arranged corresponding to the adjacent two groups of main stirring blades, and the main stirring blades are longer than the secondary stirring blades.

[0018] According to the pneumatic slurry mixer, preferably, each group of main stirring blades comprises two main stirring blades arranged at 180°, the lowermost main stirring blade is spaced apart from the bottom surface and the side wall of the stirring cylinder body by 10mm-50mm, or the lower portion and the side portion of the lowermost main stirring blade are respectively provided with brush gears abutting the bottom surface and the side wall of the stirring cylinder body.

[0019] According to the pneumatic slurry mixer, preferably, the feeding part is a feeding hopper, and a feeding grid is arranged in the feeding hopper.

[0020] According to the pneumatic slurry mixer, preferably, the driving part comprises:

[0021] a pneumatic motor supported and arranged at the top portion of the stirring cylinder body, and an output shaft of the pneumatic motor being connected with the stirring shaft.

[0022] A gas source triplex is arranged on the sidewall of the stirring cylinder body, and the gas source triplex is in transmission connection with the pneumatic motor;

[0023] The pneumatic motor drives the stirring shaft to rotate forward or reversely.

[0024] According to the pneumatic slurry stirring machine, preferably, the discharging part comprises:

[0025] A filter cover is arranged on the inner wall of the stirring cylinder body, and a discharging cavity is formed between the filter cover and the stirring cylinder body; and

[0026] A discharging pipe is arranged on the sidewall of the stirring cylinder body and communicates with the discharging cavity.

[0027] According to the pneumatic slurry stirring machine, preferably, the filter cover is a cylindrical structure with a semicircular cross section, there is at least one filter cover, and there is a clearance between the lower part of the filter cover and the bottom surface of the stirring cylinder body, and the end of the lowermost main stirring blade extends into the clearance.

[0028] According to the pneumatic slurry stirring machine, preferably, further comprising a drainage pipe arranged at the bottom of the stirring cylinder body, and a control valve is arranged on the drainage pipe.

[0029] The above technical scheme has the following beneficial effects:

[0030] The overall structure of the application is reasonable in design, and the cement slurry does not precipitate during long-term operation, the stirring effect is good, the slurry is easy to transfer, and the requirements of the coal mine site grouting operation can be met, and the application can be used in flammable and explosive, strong magnetic, radiation, dusty and other occasions, and is suitable for coal mine underground operation.

[0031] The arrangement form of the stirring blades can improve the stirring efficiency and avoid the precipitation of the bottom slurry, and can make the internal slurry flow fully mixed, avoid the stratification of the slurry concentration after long-time stirring, and ensure uniform stirring. The length adjustment of the main stirring blade and the secondary stirring blade and the arrangement density of the main stirring blade and the secondary stirring blade can adjust the stirring effect, so as to adapt to different types of equipment.

[0032] The design of the chassis structure can adjust the angle of the stirring cylinder body, so as to meet the complex operation terrain and avoid the overturning accident of the stirring cylinder body in the working area with large slope. The application has strong stability and high practicability, so as to meet the needs of various working scenes, and the adjustment is convenient and the structure is stable.

[0033] The feeding part of the application can filter the large raw materials, avoid the large materials entering the stirring cylinder, and improve the stirring quality; the application also filters the slurry after stirring through the filter cover, avoids the large particle size raw materials from blocking the discharge pipe, and the filter cover has the effect of disturbing flow, so that the slurry mixing and stirring of the stirring cylinder are more sufficient.

[0034] The liquid discharge pipe of the application can discharge the excess slurry after the stirring cylinder is cleaned, realizes the cleaning and emptying of the stirring cylinder, and has high practicability. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings of the embodiments of the application will be briefly introduced below. The drawings are only used to show some embodiments of the application, and the application is not limited to the drawings.

[0036] Figure 1 It is a structural schematic view of the pneumatic slurry mixer according to the embodiment of the application.

[0037] Figure 2 It is a structural schematic view of the adjusting unit according to the embodiment of the application. Figure 1 It is a structural schematic view of the adjusting unit according to the embodiment of the application.

[0038] Figure 3 It is a structural schematic view of the adjusting unit according to the embodiment of the application. Figure 1 It is a structural schematic view of the adjusting unit according to the embodiment of the application.

[0039] Figure 4 It is a structural schematic view of the adjusting unit according to the embodiment of the application.

[0040] The serial number in the figure:

[0041] 100 is the stirring cylinder, 101 is the feeding hopper, 102 is the feeding grid, 103 is the liquid discharge pipe, and 104 is the control valve;

[0042] 201 is the stirring shaft, 202 is the main stirring blade, and 203 is the auxiliary stirring blade;

[0043] 301 is the pneumatic motor, and 302 is the gas source three-way joint;

[0044] 401 is the filter cover, 402 is the avoiding gap, 403 is the discharge pipe, and 404 is the handle-to-jam centerline butterfly valve;

[0045] 501 is the base plate, 502 is the vertical plate, 503 is the clamping groove, and 504 is the clamping column. DETAILED DESCRIPTION

[0046] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly described in the following. Unless otherwise defined, the technical terms or scientific terms used in the present application should be understood as their common meanings to those skilled in the art.

[0047] It should be noted that when an element is referred to as being "connected", "coupled" or "linked" to another element, it can be directly connected, coupled or linked to the other element, or there can be intervening elements present. That is, the positional relationship between the two elements can be direct connection or indirect connection.

[0048] It should be noted that the use of "one" or "a" or similar referents is not necessarily limited to one or only one. The use of "including" or "comprising" or similar words is intended to encompass the elements or objects listed before the word and equivalents thereof, but does not exclude other elements or objects.

[0049] It should be noted that the terms indicating the orientation or positional relationship, such as "upper", "lower", "left", "right", etc., are only used to represent the relative positional relationship, which is for the convenience of describing the present application, and the devices or elements referred to are not necessarily required to have a specific orientation, to be constructed and operated in a specific orientation; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0050] Referring to Figures 1-4 The present application discloses a kind of pneumatic slurry agitator, including stirring barrel 100, stirring shaft 201, drive part, feed part and discharge part, stirring shaft 201 is arranged in stirring barrel 100, main stirring blade 202 is arranged on stirring shaft 100, multiple secondary stirring blades 203 are arranged on the inner wall of stirring barrel 100, main stirring blade 202 and secondary stirring blade 203 are staggered arrangement;Drive part is used to drive stirring shaft 201 action;Feed part is set in the upper portion of stirring barrel 100;Discharge part is set in the side of stirring barrel 100.

[0051] Specifically, the bottom of stirring barrel 100 in the embodiment is provided with a bottom disc 501, and an adjusting unit is arranged between the bottom disc 501 and the stirring barrel 100, the adjusting unit being used to adjust the placement angle of the stirring barrel.

[0052] The stirring barrel body is hinged to one side of the base plate, and the adjusting unit is arranged on the other side of the stirring barrel body and the base plate, the adjusting unit comprises a vertical plate 502, a clamping groove 503 and a clamping column 504, the vertical plate 502 is arranged on the base plate 501, and the lower end of the vertical plate 502 is hinged to the base plate 501; a plurality of clamping grooves 503 are arranged on the vertical plate 502 in the length direction; the clamping column 504 is arranged on the side wall of the stirring barrel body 100, and the clamping column 504 is arranged correspondingly to the clamping groove 503; in order to facilitate the lifting between the stirring barrel body 100 and the base 501, a jack or a pneumatic cylinder can be arranged between the stirring barrel body 100 and the base 501, so that the opening and closing action is realized, and then the jack or the pneumatic cylinder is released after the clamping of the clamping column and the clamping groove is completed.

[0053] Further, at least two groups of main stirring blades 502 are arranged on the stirring shaft 201 in the vertical direction in the embodiment, and a sub-stirring blade 203 is arranged correspondingly between the adjacent two groups of main stirring blades 202, and the main stirring blade 202 is longer than the sub-stirring blade 203. Each group of main stirring blades 202 is two roots arranged at 180°, and the lowermost main stirring blade 202 is spaced apart from the bottom surface and the side wall of the stirring barrel body 100 by 10mm-50mm, or the lower part and the side part of the lowermost main stirring blade 202 are respectively provided with brush teeth matched with the bottom surface and the side wall of the stirring barrel body 100.

[0054] The feeding part in the embodiment is a feeding hopper 101, and a feeding grid 102 is arranged in the feeding hopper. The driving part comprises a pneumatic motor 301 and a gas source three-way joint 302, the pneumatic motor 301 is supported and arranged on the top of the stirring barrel body 100, the output shaft of the pneumatic motor 301 is connected with the stirring shaft 201, and the gas source three-way joint 302 is arranged on the side wall of the stirring barrel body 100 and is in transmission connection with the pneumatic motor 301; the pneumatic motor 301 drives the stirring shaft 201 to rotate forward or reversely.

[0055] The discharging part comprises a filter cover 401 arranged on the inner wall of the stirring barrel body 100 and a discharging pipe 403, the filter cover 401 and the stirring barrel body 100 form a discharging cavity, the discharging pipe 403 is arranged on the side wall of the stirring barrel body 100 and communicates with the discharging cavity, the filter cover 401 is a cylindrical structure with a semicircular cross section, there is at least one filter cover 401, there is a clearance 402 between the lower part of the filter cover 401 and the bottom surface of the stirring barrel body 100, and the end part of the lowermost main stirring blade 202 extends into the clearance.

[0056] In order to facilitate cleaning, the embodiment further comprises a drainage pipe 103, the drainage pipe 103 is arranged at the bottom of the stirring barrel body 100, and a control valve 104 is arranged on the drainage pipe 103.

[0057] Working process: the pneumatic motor drives the stirring shaft to rotate by compressed air, the stirring shaft is installed with the main stirring blades in the stirring cylinder, the main stirring blades in the stirring cylinder are used to make the cement slurry, and the cement slurry is pumped out through the suction pipe (i.e. the discharge pipe) of the grouting pump after stirring. After pumping, water and cement are added in the stirring cylinder for the next slurry making.

[0058] The specific role of each component in the embodiment in working:

[0059] Pneumatic motor: the stirring direction of the stirring shaft can be changed by adjusting the air inlet and outlet.

[0060] Main stirring blades and auxiliary stirring blades: in order to prevent the cement slurry from settling, the main stirring blades on the stirring shaft are arranged at 180°, and the auxiliary stirring blades on the inner wall of the stirring cylinder are arranged in a staggered manner. The stirring blades in the embodiment are made of a circular shaft with a diameter of 20 mm, the length of the auxiliary stirring blades on the inner wall of the stirring cylinder is 200 mm, and the length of the main stirring blades on the stirring shaft is 250 mm. The above-mentioned sizes are proposed for comparing the influence of different structural sizes on the stirring effect, and are not limited to the sizes.

[0061] Chassis: the two sides of the chassis are provided with adjusting units, which can adjust the placing angle when the ground is uneven, so that the cylinder does not overturn.

[0062] Feeding part: there is enough space for feeding at the feeding port, and a grating structure is adopted.

[0063] Discharge part: after stirring, the suction pipe is inserted into the slurry outlet and fixed during grouting, and then the grouting work can be carried out.

[0064] Drainage pipe: a drainage pipe and a control valve are arranged below the horizontal height of the chassis, which is used for discharging slurry after cleaning the mixer. After cleaning, the residual slurry can be discharged by opening the control valve.

[0065] The main stirring blades on the stirring shaft and the auxiliary stirring blades on the inner side of the cylinder in the application are arranged in a staggered manner, so that the stirring is uniform and the slurry quality is high. The device uses less material and has low cost, and can be used for batch production. The vertical adjusting mechanism makes it work on different slopes, occupies small space, has light weight, and is easy to install. The pneumatic motor is safe, reliable and pollution-free. The positive effect: uniform stirring without sedimentation, eliminating the caking phenomenon of the original equipment during slurry stirring, simple operation, through multiple test verification, the stirring effect of the equipment is remarkable, and the expected effect can be achieved.

[0066] Specific operation steps:

[0067] (1) Preparation before starting:

[0068] A, observe the oil mark and check whether the lubricating oil in the oil mist is sufficient.

[0069] B. Check if the connection of each part of the machine is correct and firm.

[0070] C. Run the machine for a short time to master the operation.

[0071] (2) The operation method of starting work:

[0072] At the beginning, slowly open 1 / 2 of the air valve (to prevent the liquid from splashing due to high speed), first add a certain amount of clean water into the barrel, then add cement (determine the amount of cement according to the water-cement ratio). At this time, the air valve can be slowly opened completely, and after about 2-4 minutes of stirring, the pulp preparation work is completed. At this time, it can be pumped out through the suction pipe of the grouting pump. After pumping is completed, the barrel is added with water and cement for the next pulp preparation.

[0073] (3) Stop work:

[0074] A. Stop adding water and cement into the barrel;

[0075] B. After the cement slurry is completely pumped out, add clean water into the barrel of the mine mixer, and after cleaning is completed, when the water flowing out of the outlet is basically clean (according to the cleaning effect, the water can be added for multiple times for cleaning), the air inlet valve can be closed.

[0076] C. Clean the machine and the surrounding debris, keep the machine clean and clean.

[0077] D. Check all air paths and water paths to ensure that they are completely closed.

[0078] E. When the work is temporarily interrupted, if there is residual material in the hopper of the mine mixer, it should be kept in the stirring state at all times; when the work is stopped for a long time, all residual materials in the equipment should be cleaned, especially the mine mixer and its pipeline should be cleaned to prevent the cement slurry from solidifying.

[0079] The preferred embodiments for implementing the present application have been described in detail above, but it should be understood that the functions of these embodiments are only for example, and do not limit the scope, application or structure of the present application in any way. The scope of protection of the present application is defined by the appended claims and their equivalents. Those skilled in the art can make many changes to the foregoing embodiments under the teaching of the present application, and these changes all fall within the scope of protection of the present application.

Claims

1. An aerated slurry mixer characterized by, The device comprises: a stirring barrel; a stirring shaft arranged in the stirring barrel, a main stirring blade being arranged on the stirring shaft, a plurality of secondary stirring blades being arranged on the inner wall of the stirring barrel, the main stirring blades and the secondary stirring blades being staggered, the lowermost main stirring blade being spaced apart from the bottom surface and the side wall of the stirring barrel by 10-50 mm, or the lower part and the side part of the lowermost main stirring blade being respectively provided with brush teeth abutting the bottom surface and the side wall of the stirring barrel; a driving part for driving the stirring shaft to act; a feeding part arranged at the upper part of the stirring barrel; a discharging part arranged at the side part of the stirring barrel, the discharging part comprising a filter cover arranged on the inner wall of the stirring barrel, a discharging cavity being formed between the filter cover and the stirring barrel, and a discharging pipe arranged on the side wall of the stirring barrel and communicating with the discharging cavity; the filter cover is a barrel-shaped structure with a semicircular cross section, there is at least one filter cover, and there is a clearance between the lower part of the filter cover and the bottom surface of the stirring barrel, the end of the lowermost main stirring blade extending into the clearance; a drain pipe is further arranged at the bottom of the stirring barrel, and a control valve is arranged on the drain pipe. A bottom plate is arranged at the bottom of the stirring barrel, and an adjusting unit is arranged between the bottom plate and the stirring barrel, the adjusting unit being used for adjusting the placement angle of the stirring barrel. One side of the stirring barrel and the bottom plate is hinged, and the adjusting unit is arranged at the other side of the stirring barrel and the bottom plate, the adjusting unit comprising:

2. The pneumatic slurry agitator of claim 1, wherein, a vertical plate arranged on the bottom plate, the lower end of the vertical plate being hinged to the bottom plate; 3. The pneumatic slurry agitator of claim 2, wherein, a plurality of clamping grooves being arranged along the length direction of the vertical plate; and a clamping column arranged on the side wall of the stirring barrel, the clamping column being arranged corresponding to the clamping grooves. At least two groups of main stirring blades are arranged vertically on the stirring shaft, a secondary stirring blade being arranged corresponding between two adjacent groups of main stirring blades, and the main stirring blades are longer than the secondary stirring blades. Each group of main stirring blades comprises two blades arranged at an angle of 180°.

4. The pneumatic slurry agitator of claim 1, wherein, The feeding part is a feeding hopper, and a feeding grid is arranged in the feeding hopper.

5. The pneumatic slurry agitator of claim 4, wherein, The driving part comprises:

6. The pneumatic slurry agitator of claim 1, wherein, a pneumatic motor supported and arranged at the top of the stirring barrel, an output shaft of the pneumatic motor being connected with the stirring shaft; and 7. The pneumatic slurry agitator of claim 1, wherein, a gas source three-way joint arranged on the side wall of the stirring barrel, the gas source three-way joint being in transmission connection with the pneumatic motor; the pneumatic motor drives the stirring shaft to rotate in the forward direction or the reverse direction. ​ ​

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