Coal mine gangue concrete continuous mixer capable of accurately proportioning raw materials

Abstract

The invention discloses a coal mine gangue concrete continuous mixer capable of accurately proportioning raw materials, and belongs to the technical field of filling coal mining, the coal mine gangue concrete continuous mixer comprises a machine body and a cover plate mounted above the machine body, a stirring motor is mounted above the cover plate through screws, the output end of the stirring motor is connected with a rotating shaft, and the rotating shaft is rotatably mounted in the machine body. According to the gangue concrete continuous stirring machine for the coal mine and capable of accurately proportioning the raw materials, when gangue concrete materials need to be proportioned and conveyed, the rotating rotating shaft can drive the rotating shaft to rotate in the machine body; then, the rotating shaft can drive a first magnet and a second magnet installed on the outer side face of the baffle to drive the baffle to contract and move according to the principle that opposite magnetic fields attract each other, at the moment, the materials conveyed by the feeding port can be quantitatively and proportionally conveyed into the machine body, and the situation that the materials are accumulated in the machine body, and consequently the later mixing and stirring efficiency is affected is avoided.

Description

Technical Field

[0001] This invention relates to the field of coal filling technology, specifically to a continuous mixer for coal mine gangue concrete with precise raw material proportioning. Background Technology

[0002] Backfilling mining is a modern coal mining technology that allows for coal mining without ground collapse, waste recycling, and is safe and environmentally friendly. The continuous mixing machine for coal mine gangue concrete is the core mixing equipment for backfilling mining. It is a continuous, explosion-proof special mixing equipment designed for underground backfilling mining and roadway support in coal mines. Its core is to use coal gangue as the main aggregate and continuously mix it with cement, fly ash, water, etc. to make concrete, so as to realize on-site material sourcing and continuous and efficient production underground.

[0003] For example, in a prior art (Chinese patent application number CN201921786470.X, application date 2019-10-23), in a continuous concrete mixer, when the inner cavity of the mixing tank or the mixing rod needs to be cleaned later, two cylinders drive the motor bracket to rise through the piston rod, thereby indirectly driving the mixing rod to rise from inside the mixing tank to a position that does not affect the rotation of the support column; then the limiting bolt is rotated out of the bolt hole, and then the support column is rotated 180° through two bearings before the limiting bolt is rotated and screwed back into the bolt hole for fixation. At this time, the inner cavity space of the mixing tank becomes larger, which facilitates the washing of the inner wall, and the mixing rod is placed on the outside, which makes it more convenient for the operator to clean.

[0004] While existing technologies allow for the opening of the mixing tank to facilitate subsequent rinsing and cleaning of its inner walls, the process of mixing gangue concrete typically involves directly conveying materials into the mixer. However, this method can lead to material accumulation inside the mixer, affecting subsequent concrete mixing and processing. Therefore, a continuous coal mine gangue concrete mixer with precise raw material proportioning has been proposed to effectively solve these problems. Summary of the Invention

[0005] The purpose of this invention is to provide a continuous mixer for coal mine gangue concrete with precise raw material proportions, in order to solve the problem mentioned in the background art that in the current market, gangue concrete is basically mixed by directly conveying the materials into the mixer, but this conveying method will cause the materials to accumulate inside the mixer, which will affect the subsequent concrete mixing and processing.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a continuous mixer for coal mine gangue concrete with precise raw material proportioning, comprising a machine body and a cover plate installed on the top of the machine body. A mixing motor is screwed onto the top of the cover plate, and the output end of the mixing motor is connected to a rotating shaft, which is rotatably installed inside the machine body. Feed inlets are symmetrically installed on the top of the cover plate, and a discharge port is provided on the front bottom side of the machine body. A proportioning and feeding assembly is provided inside the cover plate, wherein the proportioning and feeding assembly includes two baffles, which are slidably installed inside the cover plate, and the top of the two baffles corresponds to the two feed inlets.

[0007] Preferably, a vertical plate is installed on the outer side of the rotating shaft, and a first magnet is installed above the vertical plate, with the first magnet corresponding to a second magnet, and the second magnet is installed on the outer side of the baffle.

[0008] Preferably, the magnetic poles of the first magnet and the second magnet are opposite.

[0009] Preferably, one end of two compression springs is fixedly connected to the inner wall of the cover plate, and the two compression springs have the same structure, and the other end of the two compression springs is fixedly connected to a baffle.

[0010] Preferably, a crossbeam is also installed on the outer side of the rotating shaft, and two auxiliary stirring rods are slidably installed below the crossbeam via guide blocks, and the two auxiliary stirring rods are symmetrically arranged about the transverse center line of the crossbeam.

[0011] Preferably, the two auxiliary stirring rods are staggered on both sides of the main stirring rod.

[0012] Preferably, one end of a return spring is fixedly connected to the inner wall of the two auxiliary stirring rods, and the other end of the two return springs is fixedly connected to a crossbar.

[0013] Preferably, the feed inlet is equipped with an explosion-proof raw material metering sensor unit, and the machine body is equipped with a stirring status monitoring unit, which is connected to an intrinsically safe intelligent control unit for real-time acquisition and adjustment of raw material ratio and stirring parameters.

[0014] Preferably, the proportioning and feeding component is equipped with an electromagnetic auxiliary drive structure, which is connected to the intelligent control unit. It can work with the original magnetic control mechanism to automatically adjust the baffle opening and feeding time, thereby improving the proportioning accuracy.

[0015] Preferably, the equipment is equipped with an intrinsically safe human-machine interface and downhole communication unit on the outside, which is used for local parameter setting, status display and remote data uploading; the intelligent control unit has built-in fault identification and safety protection programs, which can realize automatic alarm and shutdown protection for overload, material blockage and abnormal proportion.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) When it is necessary to mix and process gangue concrete, the material is simply fed into the machine body through two feed ports. Then, the mixing motor is started to drive a row of main mixing rods installed on the outer side of the rotating shaft to rotate inside the machine body, so as to realize the continuous mixing and stirring of gangue concrete raw materials. Finally, the material is discharged to the outside of the machine body through the discharge port to complete the mixing and processing of gangue concrete materials.

[0017] (2) When it is necessary to mix and transport gangue concrete materials, the rotating shaft will drive the shaft to rotate inside the machine body. Then the shaft will drive the first magnet and the second magnet installed on the outer side of the baffle to drive the baffle to contract and move through the principle of magnetic attraction between opposite poles. At this time, the material conveyed by the feed port can be quantitatively transported to the inside of the machine body to avoid the accumulation of materials inside the machine body and affect the mixing efficiency in the later stage.

[0018] (3) When the first magnet and the second magnet are no longer in magnetic contact, the compression spring will reset the position of the retracted baffle through its own elastic force, so as to block the material conveyed by the feed port, thereby improving the mixing effect of gangue concrete material.

[0019] (4) While the rotating shaft drives the main mixing rod to mix the material being transported, the rotating shaft will also drive the two auxiliary mixing rods installed below the cross frame to rotate simultaneously, so as to better cooperate with the main mixing rod to mix the gangue concrete material being transported.

[0020] (5) During the process of mixing gangue concrete material by the two auxiliary stirring rods driven by the cross frame and the main stirring rod, the two top blocks installed at the bottom of the machine body will simultaneously squeeze and move the two rotating auxiliary stirring rods upward. Then, the two auxiliary stirring rods will move up and down through the guide blocks set by the cross frame, thereby expanding the mixing effect of the two auxiliary stirring rods on the gangue concrete material. Finally, the position of the auxiliary stirring rods after the lifting and lowering movement can be reset by the elastic force of the reset spring, so as to facilitate the subsequent connection, mixing and stirring processing.

[0021] (6) The equipment is equipped with an intelligent control module, which can monitor the operating status such as raw material feed, material level, and stirring resistance in real time. Through closed-loop control, it automatically optimizes the proportion and stirring action, making the raw material proportion more accurate and the operation more stable. At the same time, it supports local operation and underground remote monitoring, and has automatic fault diagnosis and safety protection functions, which significantly improves the intelligence and safety of underground coal mine filling and mixing. Attached Figure Description

[0022] Figure 1 This is a frontal three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of a partial three-dimensional structure of the fuselage of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the main stirring rod and the auxiliary stirring rod after rotation according to the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a partial three-dimensional structural diagram of the rotating shaft and vertical plate of the present invention; Figure 6 This is a partial three-dimensional structural diagram of the cross frame and auxiliary stirring rod of the present invention.

[0023] In the diagram: 1. Machine body; 2. Cover plate; 3. Stirring motor; 4. Feed inlet; 5. Discharge outlet; 6. Baffle; 7. Rotating shaft; 8. Main stirring rod; 9. Horizontal frame; 10. Secondary stirring rod; 11. Top block; 12. Vertical plate; 13. First magnet; 14. Second magnet; 15. Compression spring; 16. Return spring. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] This utility model provides the following technical solution: a continuous mixer for coal mine gangue concrete with precise raw material proportioning: Example 1 addresses the problem that in the current process of mixing gangue concrete, materials are typically directly fed into the mixer, which leads to material accumulation inside the mixer and affects subsequent concrete mixing. The following method is disclosed: The machine body 1 and a cover plate 2 mounted on top of the machine body 1 are provided. A mixing motor 3 is screwed onto the top of the cover plate 2, and the output end of the mixing motor 3 is connected to a rotating shaft 7. The rotating shaft 7 is rotatably mounted inside the machine body 1. Feed inlets 4 are symmetrically mounted on the top of the cover plate 2, and a discharge port 5 is located on the front bottom of the machine body 1. When mixing and processing gangue concrete, the material is simply fed into the machine body 1 through the two feed inlets 4. Then, the mixing motor 3 is started, driving a row of main mixing rods 8 mounted on the outer side of the rotating shaft 7 to rotate inside the machine body 1. This allows for continuous mixing and blending of the gangue concrete raw materials. Finally, the material is discharged to the outside of the machine body 1 through the discharge port 5, thus completing the mixing and processing of the gangue concrete material. Figure 1 and Figure 2 As shown.

[0026] The cover plate 2 is equipped with a proportioning and feeding assembly, which includes two baffles 6 that are slidably installed inside the cover plate 2. The baffles 6 have two feed inlets 4 above them. A vertical plate 12 is installed on the outer side of the rotating shaft 7, and a first magnet 13 is installed above the vertical plate 12, corresponding to a second magnet 14. The second magnet 14 is installed on the outer side of the baffles 6. The magnetic poles of the first magnet 13 and the second magnet 14 are opposite. When it is necessary to proportion and transport gangue concrete materials, the rotating shaft 7 will rotate inside the machine body 1. The rotating shaft 7 will then drive the first magnet 13 and the second magnet 14 installed on the outer side of the baffles 6 to retract and move due to the attraction of opposite magnetic poles. This allows the material fed through the feed inlets 4 to be quantitatively proportioned and transported into the machine body 1, preventing material accumulation inside the machine body 1 and affecting the subsequent mixing efficiency. Figures 1-4 As shown.

[0027] Two compression springs 15 are fixedly connected to one end of the inner wall of the cover plate 2. The two compression springs 15 have identical structures, and the other end of each compression spring 15 is fixedly connected to a baffle 6. When the first magnet 13 and the second magnet 14 are no longer in magnetic contact, the compression springs 15 will use their own elasticity to reset the position of the baffle 6 after its retraction and movement, thereby clearing any blockages in the material conveyed through the feed inlet 4. Figure 4 As shown.

[0028] Example 2 differs from Example 1 in that two top blocks 11 can be used to assist the main mixing rod 8 in mixing the incoming materials, thereby improving the mixing efficiency of the gangue concrete. The following is disclosed: A crossbeam 9 is also installed on the outer side of the rotating shaft 7. Two auxiliary stirring rods 10 are slidably installed below the crossbeam 9 via guide blocks. The two auxiliary stirring rods 10 are symmetrically arranged about the transverse centerline of the crossbeam 9 and are staggered on both sides of the main stirring rod 8. One end of a return spring 16 is fixedly connected to the inner wall of the two auxiliary stirring rods 10, and the other end of the return spring 16 is fixedly connected to the crossbeam 9. While the rotating shaft 7 drives the main stirring rod 8 to mix the incoming material, the rotating shaft 7 simultaneously drives the crossbeam 9 to rotate the two auxiliary stirring rods 10 installed below, better cooperating with the main stirring rod 8 to... The incoming gangue concrete material is mixed and stirred. During the mixing process, the two auxiliary stirring rods 10, driven by the cross frame 9 and working in conjunction with the main stirring rod 8, simultaneously compress and lift the two rotating auxiliary stirring rods 10. The two auxiliary stirring rods 10 then move up and down via guide blocks on the cross frame 9, thus amplifying the mixing effect on the gangue concrete material. Finally, the return spring 16, with its own elasticity, resets the position of the auxiliary stirring rods 10 after lifting and lowering, facilitating subsequent connection, mixing, and processing. Figure 5 and Figure 6 As shown.

[0029] Example 3: Based on Examples 1 and 2, intelligent control functions are added. Explosion-proof metering sensors at the feed inlet collect real-time data on the feeding of each raw material and transmit it to an intrinsically safe PLC controller. The controller, according to the preset ratio, controls the electromagnetic auxiliary drive mechanism in conjunction with the original magnetic control baffle mechanism to automatically adjust the feeding speed and quantity, achieving precise closed-loop mixing. Simultaneously, the mixing status is monitored by material level, torque, and temperature sensors inside the machine body, automatically adjusting the speed of the mixing motor to prevent material blockage, idling, and overload. The equipment panel allows for parameter setting and status viewing. Data is uploaded to the ground control center via an underground communication module. In case of abnormalities, automatic audible and visual alarms are triggered, and the machine is shut down for protection. The entire process is stable, intelligent, and safe.

[0030] The above is the entire working process of the device, and all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0031] The contents not described in detail in this specification are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A coal mine gangue concrete continuous mixer with precise raw material proportioning, comprising a machine body (1) and a cover plate (2) installed on the top of the machine body (1), wherein a mixing motor (3) is screwed on the top of the cover plate (2), and the output end of the mixing motor (3) is connected to a rotating shaft (7), and the rotating shaft (7) is rotatably installed inside the machine body (1); Its features are: The cover plate (2) is symmetrically equipped with a feed inlet (4) and the bottom front side of the machine body (1) is provided with a discharge outlet (5). The cover plate (2) is provided with a proportioning and feeding component, which includes two baffles (6). The two baffles (6) are slidably installed inside the cover plate (2), and the two baffles (6) are located above two feed inlets (4).

2. The continuous mixing machine for coal mine gangue concrete with precise raw material proportioning according to claim 1, characterized in that: A vertical plate (12) is installed on the outer side of the rotating shaft (7), and a first magnet (13) is installed above the vertical plate (12). The first magnet (13) corresponds to a second magnet (14), and the second magnet (14) is installed on the outer side of the baffle (6).

3. The continuous mixing machine for coal mine gangue concrete with precise raw material proportioning according to claim 2, characterized in that: The first magnet (13) has opposite magnetic poles to the second magnet (14).

4. The continuous mixing machine for coal mine gangue concrete with precise raw material proportioning according to claim 1, characterized in that: The inner wall of the cover plate (2) is fixedly connected to one end of two compression springs (15), and the two compression springs (15) have the same structure. The other end of the two compression springs (15) is fixedly connected to a baffle (6).

5. A continuous mixing mill for coal mine gangue concrete with precise raw material proportioning according to claim 1, characterized in that: The outer side of the rotating shaft (7) is also equipped with a cross frame (9), and two auxiliary stirring rods (10) are slidably installed below the cross frame (9) via guide blocks, and the two auxiliary stirring rods (10) are symmetrically arranged about the transverse center line of the cross frame (9).

6. A continuous mixing mill for coal mine gangue concrete with precise raw material proportioning according to claim 5, characterized in that: The two auxiliary stirring rods (10) are staggered on both sides of the main stirring rod (8).

7. A continuous mixing mill for coal mine gangue concrete with precise raw material proportioning according to claim 6, characterized in that: The inner walls of the two auxiliary stirring rods (10) are fixedly connected to one end of the return spring (16), and the other end of the two return springs (16) is fixedly connected to the crossbar (9).

8. A continuous mixing mill for coal mine gangue concrete with precise raw material proportioning according to claim 7, characterized in that: The feed inlet is equipped with an explosion-proof raw material metering sensor unit, and the machine body is equipped with a stirring status monitoring unit. The whole is connected to an intrinsically safe intelligent control unit for real-time collection and adjustment of raw material ratio and stirring parameters.

9. A continuous mixing mill for coal mine gangue concrete with precise raw material proportioning according to claim 8, characterized in that: The proportioning and feeding component is equipped with an electromagnetic auxiliary drive structure, which is connected to the intelligent control unit. It can work with the original magnetic control mechanism to automatically adjust the baffle opening and feeding time, thereby improving the proportioning accuracy.

10. A continuous mixing mill for coal mine gangue concrete with precise raw material proportioning according to claim 9, characterized in that: The equipment is equipped with an intrinsically safe human-machine interface and downhole communication unit on the outside, which is used for local parameter setting, status display and remote data uploading; the intelligent control unit has built-in fault identification and safety protection programs, which can realize automatic alarm and shutdown protection for overload, material blockage and abnormal proportion.

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