Automatic cleaning device for ash discharging opening of filling and stirring barrel

Abstract

The utility model discloses an automatic cleaning device for an ash discharging opening of a filling and stirring barrel, which comprises the filling and stirring barrel and a second driving motor arranged above the filling and stirring barrel, the output end of the second driving motor is connected with a turbine worm speed reducer through a coupler, and the output end of the turbine worm speed reducer is connected with a transmission shaft. The free end of the transmission shaft is inserted into an ash discharging pipe at the top of the filling and stirring barrel and is connected with a circular ring cleaner in the ash discharging pipe; the automatic cleaning device further comprises a time relay and an intermediate relay, the time relay and the intermediate relay are electrically connected with the signal input end of the PLC, and the signal output end of the PLC is electrically connected with the first driving motor and the second driving motor. The circular ring cleaner in the ash discharging pipe is regularly controlled to clean the ash discharging opening of the filling and stirring barrel, so that the problems that cement wetted at the ash discharging opening cannot be cleaned in time when the filling and stirring barrel runs, the ash discharging opening is easily blocked by caking, and abnormal shutdown is caused are solved.

Description

Technical Field

[0001] This utility model relates to filling slurry preparation equipment, specifically to an automatic cleaning device for the ash outlet of a filling mixing tank. Background Technology

[0002] A certain mining area's backfilling and mixing plant is divided into two phases, constructed to meet the backfilling requirements of the mining area's 4.5 million tons per year mining output. The ore has a specific gravity of 3, and considering a dewatering, loss, and settling coefficient of 1.15, the maximum required backfilling volume is 1.725 million m³ / year. The average daily backfilling volume of the phase two mixing plant is 1500 m³ / d, and that of the phase three mixing plant is 3500 m³ / d. The backfilling and mixing plant has three sets of backfill slurry preparation systems, each with a backfilling capacity of 150 m³ / h and a pure backfilling time of 10 hours / day.

[0003] The filling and mixing plant employs a high-concentration rod-milled sand slurry gravity-flow filling process. The filling aggregate is rod-milled sand, and the binding material is cement (containing fly ash). The sand-to-ash ratio is 1:4, and the designed concentration of the filling slurry is 78%. The prepared filling slurry flows by gravity through filling pipelines to each filling goaf area. The filling mixing tank used has dimensions of ￠2600mm×3000mm (H) and a total volume of 15.9m³. 3 The effective mixing volume is 12.7m³. 3 The preparation capacity is 150m 3 / h. However, during the preparation process, the high-speed rotating impeller of the filling mixing tank drives the high-concentration slurry to rotate and mix. The cement slurry splashes, causing the inlet to be easily wetted by water. After being wetted, the cement adheres to the inner wall of the lower ash pipe and solidifies into clumps. As the running time increases, more and more clumps accumulate, causing the inlet to gradually narrow until it becomes blocked, resulting in abnormal shutdown and affecting the filling quality. Therefore, it is necessary to stop the machine for regular cleaning. During cleaning, manual entry into the mixing tank is required to remove the clumps of cement blocking the inlet. The cleaning process is not only time-consuming and labor-intensive, but also poses significant safety hazards. Utility Model Content

[0004] This utility model provides an automatic cleaning device for the ash outlet of a filling mixing tank, which aims to solve the problem that the ash outlet of the filling mixing tank is easily blocked, causing abnormal shutdown, affecting the filling quality, and posing great difficulties and safety hazards during cleaning.

[0005] To achieve its purpose, this utility model adopts the following technical solution:

[0006] An automatic cleaning device for the ash outlet of a filling mixing tank includes a filling mixing tank. Inside the tank is a mixing shaft driven by a first drive motor, and a mixing impeller is connected to the mixing shaft. A bent ash outlet pipe is located at the top of the filling mixing tank, with its vertical section inserted into the tank. The automatic cleaning device includes a second drive motor positioned above the filling mixing tank. The output end of the second drive motor is connected to a worm gear reducer via a coupling. The output end of the worm gear reducer is connected to a drive shaft, the free end of which is inserted into the ash outlet pipe and connected to a circular cleaner horizontally positioned within the vertical section of the ash outlet pipe. The automatic cleaning device also includes a time relay and an intermediate relay, both electrically connected to the signal input terminals of a PLC programmable controller. The signal output terminals of the PLC programmable controller are electrically connected to the first and second drive motors.

[0007] Furthermore, the ring cleaner includes a ring with a mounting hole at its center and several cleaning rods arranged inside the ring around the outer periphery of the mounting hole.

[0008] Furthermore, there are three cleaning rods, equidistantly positioned within the ring.

[0009] Furthermore, the outer diameter of the ring is the same as the inner diameter of the lower ash pipe.

[0010] Furthermore, the end of the drive shaft is inserted into the mounting hole and connected by a shaft key.

[0011] Furthermore, the connection between the drive shaft and the lower ash pipe is sealed with a Y-shaped sealing ring.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This utility model provides an automatic cleaning device for the ash inlet of a filling mixing tank. By controlling a circular cleaner inside the ash inlet pipe at set times, it periodically cleans the ash inlet of the filling mixing tank. This solves the problem of wet cement at the ash inlet not being cleaned in time during the operation of the filling mixing tank, leading to cement lumps that easily clog the ash inlet and cause abnormal shutdowns. After actual application at a filling station in a mining area, all cement adhering to the cement inlet of the mixing tank has been cleaned up, completely resolving a series of problems caused by ash leakage, ash overflow, and shutdowns due to blockage of the ash inlet pipe. This saves raw materials, reduces the labor intensity and cleaning difficulty for workers, improves operational efficiency and filling quality, and is intelligent, safe, and practical. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the automatic cleaning device for the ash outlet of this utility model;

[0015] Figure 2 This is a schematic diagram of the circular cleaner structure of this utility model;

[0016] In the figure: 1-stirring shaft; 2-stirring impeller; 3-filling mixing tank; 4-circular cleaner; 5-drive shaft; 6-second drive motor; 7-coupling; 8-worm gear reducer; 9-lower ash pipe; 10-circular ring; 11-cleaning rod; 12-mounting hole; 13-first drive motor. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] like Figure 1-2 As shown, this utility model is an automatic cleaning device for the ash outlet of a filling mixing tank, including a filling mixing tank 3. The filling mixing tank 3 has a mixing shaft 1 driven by a first drive motor 13 inside, and a mixing impeller 2 connected to the mixing shaft 1. A bent ash outlet pipe 9 is located at the top of the filling mixing tank 3, with its lower vertical section inserted into the filling mixing tank 3. The automatic cleaning device includes a second drive motor 6 located above the filling mixing tank 3. The output end of the second drive motor 6 is connected to a worm gear reducer 8 via a coupling 7. The output end of the worm gear reducer 8 is connected to a drive shaft 5 with a diameter of 40mm. The free end of the drive shaft 5 is inserted into the ash outlet pipe 9 and connected to a circular cleaner 4 horizontally located within the vertical section of the ash outlet pipe 9. The circular cleaner 4 includes a circular ring 10 with a diameter of 350 mm and a height of 100 mm. The steel plate of the circular ring 10 is 3 mm thick. The outer diameter of the circular ring 10 is the same as the inner diameter of the lower ash pipe 9. A mounting hole 12 is provided at the center of the circular ring 10. Three cleaning rods 11 with a diameter of 20 mm are provided at equal intervals around the outer periphery of the mounting hole 12 inside the circular ring 10 for support and fixation. Specifically, the end of the drive shaft 5 is inserted into the mounting hole 12 and connected by a shaft key. The connection between the drive shaft 5 and the lower ash pipe 9 is sealed by a Y-type sealing ring to prevent leakage of filling material during the up and down movement.

[0019] The automatic cleaning device also includes a time relay and an intermediate relay, which are electrically connected to the signal input terminals of the PLC programmable controller, and the signal output terminals of the PLC programmable controller are electrically connected to the first drive motor 13 and the second drive motor 6, respectively.

[0020] During operation, the automatic cleaning device of this application is interlocked with the first drive motor 13 of the filling mixing tank 3. After the filling mixing tank 3 runs for 10 minutes, the automatic cleaning device starts running. After the filling mixing tank 3 stops running for 3 minutes, the automatic cleaning device stops running.

[0021] During cleaning, time relays and intermediate relays control the second drive motor 6 to start every 15 minutes, controlling the rotation of the worm gear reducer 8. This, in turn, drives the annular cleaner 4 at the end of the drive shaft 5 to reciprocate up and down along the vertical section of the ash pipe 9. This periodically cleans the cement clumps adhering to the inner wall of the vertical section of the ash pipe 9, promptly removing the cement slurry adhering to the inner wall of the ash pipe 9 and transferring it into the filling mixing tank 3 for mixing. This prevents cement, wetted by the slurry, from remaining in the ash pipe 9 for extended periods and causing blockages. After practical application at a filling station in a mining area, all the cement adhering to the inner wall of the ash pipe 9 in the filling mixing tank 3 has been completely cleaned, thoroughly resolving a series of problems caused by blockages in the ash pipe 9, such as ash leakage, ash emission, and equipment shutdowns. This saves raw materials and reduces equipment malfunctions.

Claims

1. An automatic cleaning device for the ash outlet of a filling mixing tank, comprising a filling mixing tank (3), wherein the filling mixing tank (3) is provided with a stirring shaft (1) driven by a first drive motor (13), a stirring impeller (2) is connected to the stirring shaft (1), and a bent ash outlet pipe (9) is provided at the top of the filling mixing tank (3) with the vertical section of the ash outlet pipe (9) inserted into the filling mixing tank (3), characterized in that: The automatic cleaning device includes a second drive motor (6) located above the filling mixing tank (3). The output end of the second drive motor (6) is connected to a worm gear reducer (8) via a coupling (7). The output end of the worm gear reducer (8) is connected to a drive shaft (5). The free end of the drive shaft (5) is inserted into the lower ash pipe (9) and connected to a circular cleaner (4) horizontally located in the vertical section of the lower ash pipe (9). The automatic cleaning device also includes a time relay and an intermediate relay. The time relay and the intermediate relay are electrically connected to the signal input terminal of the PLC programmable controller, and the signal output terminal of the PLC programmable controller is electrically connected to the first drive motor (13) and the second drive motor (6), respectively.

2. The automatic cleaning device for the ash outlet of a filling mixing tank as described in claim 1, characterized in that: The circular cleaner (4) includes a circular ring (10), with a mounting hole (12) at the center of the circular ring (10), and a number of cleaning rods (11) arranged inside the circular ring (10) around the outer periphery of the mounting hole (12).

3. The automatic cleaning device for the ash outlet of a filling mixing tank as described in claim 2, characterized in that: The cleaning rods (11) are three in number and are equidistantly arranged inside the ring (10).

4. The automatic cleaning device for the ash outlet of a filling mixing tank as described in claim 3, characterized in that: The outer diameter of the ring (10) is the same as the inner diameter of the lower gray pipe (9).

5. The automatic cleaning device for the ash outlet of a filling mixing tank as described in claim 4, characterized in that: The end of the drive shaft (5) is inserted into the mounting hole (12) and connected by a shaft key.

6. The automatic cleaning device for the ash outlet of a filling mixing tank as described in claim 5, characterized in that: The connection between the drive shaft (5) and the lower ash pipe (9) is sealed by a Y-type sealing ring.

Images