Magnetite powder dense medium adding device for coal preparation plant

Abstract

The utility model discloses a magnetite powder dense medium adding device of a coal preparation plant, which is characterized in that a trench is arranged on the ground of a flushing medium warehouse, a slope communicated with the trench is arranged in the flushing medium warehouse, a first flushing pipe is fixed on the slope, the first flushing pipe penetrates out of the flushing medium warehouse and is communicated with a water inlet main pipe, and an electromagnetic valve is arranged on the water inlet main pipe; nozzles facing the slope are uniformly distributed on the first flushing pipe along the length direction; the flushing medium library is communicated with the sweeping pump pit through a trench, and a sweeping pump is arranged in the sweeping pump pit; a fixing rod is vertically arranged above the sweeping pump pit, and a first proximity switch and a second proximity switch are fixed on the fixing rod from bottom to top; the end part of the PVC pipe is fixedly connected with the floating ball, and an iron sheet is arranged on the PVC pipe; a circular ring is further horizontally fixed to the fixing rod, the floating ball is arranged in the sweeping pump pit, and the PVC pipe is movably arranged in the circular ring in a penetrating mode. The first proximity switch and the second proximity switch are electrically connected with the input end of the controller, and the output end of the controller is electrically connected with the electromagnetic valve and the sweeping pump.

Description

Technical field:

[0001] The utility model relates to the technical field of coal preparation plants, in particular to a device for adding magnetite powder heavy medium to coal preparation plants. Background technology:

[0002] A coal plant is a coal processing plant that sorts coal, removes mineral impurities from the raw coal, and separates it into products of different specifications. In a coal preparation plant, magnetite powder needs to be placed inside the processing equipment. The common way of adding it is: manually use a water pipe to flush the magnetite powder heavy medium so that it flows into the sweeping pump pit. The sweeping pump uses a BUQK-01 explosion-proof float liquid level controller to control the start and stop, and the sweeping pump is pumped into the concentrated medium barrel through the sweeping pump; however, the above process has the following disadvantages: 1. The workload of manual flushing is large, and the body will be wet after each flushing of the magnetite powder heavy medium; 2. After long-term use, the connecting rod of the explosion-proof float liquid level controller will rust, resulting in the float unable to float up or fall, thereby affecting the start and stop of the sweeping pump, and the sweeping pump pit is often flooded or the sweeping pump is idling for a long time. Utility model content:

[0003] The utility model aims to provide a device for adding magnetite powder heavy medium to a coal preparation plant.

[0004] The purpose of the utility model is implemented by the following technical scheme: a device for adding heavy medium of magnetite powder in a coal preparation plant, which comprises a flushing medium storehouse, a trench, a sweeping pump pit, a sweeping pump, a fixing rod, a ring, a floating ball, a PVC pipe, a first proximity switch and a second proximity switch; the end of the PVC pipe is fixedly connected to the floating ball, and an iron sheet is wrapped outside the PVC pipe;

[0005] The trench is opened on the ground of the flushing medium reservoir, a slope is provided in the flushing medium reservoir, which descends from the wall to the trench, a first flushing water pipe is fixed on the slope along the length direction of the trench, the first flushing water pipe passes through the flushing medium reservoir and is connected to the water inlet main pipe, a solenoid valve is provided on the water inlet main pipe, and nozzles are evenly distributed on the first flushing water pipe along the length direction and arranged toward the slope;

[0006] The flushing medium reservoir is connected to the sweeping pump pit through the trench, and the sweeping pump is arranged in the sweeping pump pit; the fixing rod is vertically arranged above the sweeping pump pit, and the first proximity switch and the second proximity switch are fixed on the fixing rod in sequence from bottom to top; a horizontally arranged circular ring is also fixed on the fixing rod, the floating ball is placed in the sweeping pump pit, and the PVC pipe is movably inserted in the circular ring;

[0007] The first proximity switch and the second proximity switch are electrically connected to the input end of the controller respectively, and the output end of the controller is electrically connected to the solenoid valve and the sweeping pump respectively.

[0008] Preferably, the trench is opened on the ground center line of the flushing medium storage, and the slopes descending from the wall toward the trench are respectively provided on the ground on both sides of the trench, and the two slopes are arranged opposite to each other; the first flushing pipe is respectively fixed in the middle of each slope along the length direction of the trench.

[0009] Preferably, second flushing water pipes are fixed on both side walls of the trench along the length direction, and nozzles arranged toward the trench are evenly distributed on the second flushing water pipes along the length direction. The first flushing water pipe and the second flushing water pipe located on the same side of the trench are connected through a branch pipe.

[0010] Preferably, a third proximity switch is fixed on the fixing rod above the second proximity switch, the third proximity switch is electrically connected to the input end of the controller, and the output end of the controller is electrically connected to the sound and light alarm.

[0011] Preferably, the angle α between the slope and the horizontal direction is 6-10°.

[0012] Advantages of the utility model: the utility model is provided with a flushing medium reservoir, a trench, a first flushing water pipe, a second flushing water pipe, a sweeping pump pit, a sweeping pump, a floating ball, a PVC pipe, a first proximity switch and a second proximity switch; two oppositely arranged slopes are arranged in the flushing medium reservoir, a first flushing water pipe is arranged on the slope, and magnetite powder can be transported to the trench through the nozzle of the first flushing water pipe; second flushing water pipes are respectively fixed on the two side walls of the trench along the length direction, and magnetite powder can be transported from the trench to the sweeping pump pit through the nozzle of the second flushing water pipe; the floating ball drives the PVC pipe to rise or fall as the liquid level in the sweeping pump pit changes. When the second proximity switch detects the iron sheet on the PVC pipe, the controller controls the solenoid valve to close and the sweeping pump to start, and the material in the sweeping pump pit is transported to the concentrated medium barrel through the sweeping pump; when the first proximity switch detects the iron sheet on the PVC pipe, the controller controls the sweeping pump to stop and the solenoid valve to open, so as to realize automatic control of flushing and the start and stop of the sweeping pump, avoiding the time-consuming and labor-intensive manual flushing. The float, PVC pipe, the first proximity switch and the second proximity switch are used to replace the explosion-proof float liquid level controller to prevent the problem of automatic start and stop of the sweeping pump due to rust of the connecting rod of the explosion-proof float liquid level controller. Description of the drawings:

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creativity and labor.

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 yes Figure 1 AA section view.

[0016] Figure 3 It is a control principle diagram of the utility model.

[0017] The components in the accompanying drawings are marked as follows: flushing medium reservoir 1, slope 1.1, ditch 2, sweeping pump pit 3, sweeping pump 4, fixing rod 5, ring 6, float 7, PVC pipe 8, first proximity switch 9, second proximity switch 10, iron sheet 11, first flushing pipe 12, water inlet main 13, solenoid valve 14, second flushing pipe 15, controller 16, third proximity switch 17, sound and light alarm 18. Specific implementation method:

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1-Figure 3 As shown, a device for adding heavy medium of magnetite powder in a coal preparation plant comprises a flushing medium reservoir 1, a trench 2, a sweeping pump pit 3, a sweeping pump 4, a fixing rod 5, a ring 6, a floating ball 7, a PVC pipe 8, a first proximity switch 9 and a second proximity switch 10; the end of the PVC pipe 8 is fixedly connected to the floating ball 7, and an iron sheet 11 is wrapped outside the PVC pipe 8;

[0020] A trench 2 is opened in the center of the ground of the flushing medium reservoir 1 along the length direction. Slopes 1.1 are respectively provided on the ground on both sides of the trench 2 in the flushing medium reservoir 1, which are lowered from the wall to the trench 2. The two slopes 1.1 are arranged opposite to each other, and the angle α between each slope 1.1 and the horizontal direction is 6-10°; a first flushing water pipe 12 is respectively fixed in the middle of each slope 1.1 along the length direction of the trench 2, and the two first flushing water pipes 12 respectively pass through the flushing medium reservoir 1 and are connected to the water inlet main pipe 13, and a solenoid valve 14 is provided on the water inlet main pipe 13. The first flushing water pipe 12 is uniformly distributed along the length direction with nozzles arranged toward the slope 1.1. Two oppositely arranged slopes 1.1 are provided in the flushing medium reservoir 1, and the first flushing water pipe 12 is provided on the slope 1.1. Through the first flushing water pipe 1 The nozzles of 2 can transport magnetite powder into the trench 2; second flushing pipes 15 are respectively fixed along the length direction on the two side walls of the trench 2, and the first flushing pipe 12 and the second flushing pipe 15 are both made of galvanized steel pipes. Sprinklers arranged toward the trench 2 are evenly distributed along the length direction on the second flushing pipe 15, and the first flushing pipe 12 and the second flushing pipe 15 located on the same side of the trench 2 are connected through a branch pipe, and the magnetite powder can be transported from the trench 2 to the sweeping pump pit 3 through the nozzles of the second flushing pipe 15; the two second flushing pipes 15 far from the outlet of the trench 2 are connected through a pipeline, and a nozzle facing the trench 2 is arranged on the pipeline connecting the two second flushing pipes 15, so as to facilitate the transportation of magnetite powder in the trench 2 to the sweeping pump pit 3;

[0021] The flushing medium reservoir 1 is connected to the sweeping pump pit 3 through a trench 2, and a sweeping pump 4 is arranged in the sweeping pump pit 3; a fixing rod 5 is vertically arranged above the sweeping pump pit 3, and a first proximity switch 9 and a second proximity switch 10 are fixed on the fixing rod 5 from bottom to top, the first proximity switch 9 serves as a low liquid level detection point, and the second proximity switch 10 serves as a high liquid level detection point; a horizontally arranged ring 6 is also fixed on the fixing rod 5, a floating ball 7 is placed in the sweeping pump pit 3, and a PVC pipe 8 is movably arranged in the ring 6. As the liquid level in the sweeping pump pit 3 changes, the floating ball 7 drives the PVC pipe 8 to rise or fall; the first proximity switch 9 and the second proximity switch 10 are respectively electrically connected to the input end of the controller 16, and the output end of the controller 16 is respectively connected to the solenoid valve 14 and the sweeping pump 4. When the second proximity switch 10 detects the iron sheet 11 on the PVC pipe 8, the controller 16 controls the solenoid valve 14 to close and the sweeping pump 4 to start; when the first proximity switch 9 detects the iron sheet 11 on the PVC pipe 8, the controller 16 controls the sweeping pump 4 to stop and the solenoid valve 14 to open; a third proximity switch 17 is fixed on the fixed rod 5 above the second proximity switch 10, and the third proximity switch 17 is electrically connected to the input end of the controller 16, and the output end of the controller 16 is electrically connected to the sound and light alarm 18. When the third proximity switch 17 detects the iron sheet 11 on the PVC pipe 8, the controller 16 controls the sound and light alarm 18 to alarm, so as to avoid the failure of the second proximity switch 10 to detect the iron sheet 11, resulting in an overflow accident of the material pit of the sweeping pump 4.

[0022] Working process: start the solenoid valve 14, water enters the first flushing pipe 12 through the water inlet main pipe 13, and is sprayed out from the nozzle on the first flushing pipe 12 to flush the magnetite powder on the slope 1.1 of the flushing medium 1, and the magnetite powder enters the ditch 2. At the same time, the water in the first flushing pipe 12 enters the second flushing pipe 15 through the branch pipe, and is sprayed out from the nozzle on the second flushing pipe 15 to flush the magnetite powder in the ditch 2. The flushed magnetite powder enters the sweeping pump pit 3 along the ditch 2; the liquid level in the sweeping pump pit 3 rises, and the float 7 drives the PVC pipe 8 to rise. When the second proximity switch 10 detects the iron sheet 11 on the PVC pipe 8, the controller 16 controls the solenoid valve 14 The sweeping pump 4 is turned off and started to transport the material in the sweeping pump pit 3 to the concentrated medium barrel through the sweeping pump 4. When the liquid level in the sweeping pump pit 3 decreases, the float 7 drives the PVC pipe 8 to descend. When the first proximity switch 9 detects the iron sheet 11 on the PVC pipe 8, the controller 16 controls the sweeping pump 4 to stop and the solenoid valve 14 to open; if the second proximity switch 10 fails and cannot detect the iron sheet 11 during the process of the float 7 driving the PVC pipe 8 to rise, the float 7 drives the PVC pipe 8 to continue to rise until the third proximity switch 17 detects the iron sheet 11 on the PVC pipe 8. The controller 16 controls the sound and light alarm 18 to alarm, so that the operating personnel can handle it in time.

[0023] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for adding magnetite powder to a coal preparation plant, characterized in that: It includes a flushing medium reservoir, a trench, a sweeping pump pit, a sweeping pump, a fixing rod, a ring, a floating ball, a PVC pipe, a first proximity switch and a second proximity switch; the end of the PVC pipe is fixedly connected to the floating ball, and an iron sheet is wrapped outside the PVC pipe; The trench is opened on the ground of the flushing medium reservoir, a slope is provided in the flushing medium reservoir, which descends from the wall to the trench, a first flushing water pipe is fixed on the slope along the length direction of the trench, the first flushing water pipe passes through the flushing medium reservoir and is connected to the water inlet main pipe, a solenoid valve is provided on the water inlet main pipe, and nozzles are evenly distributed on the first flushing water pipe along the length direction and arranged toward the slope; The flushing medium reservoir is connected to the sweeping pump pit through the trench, and the sweeping pump is arranged in the sweeping pump pit; the fixing rod is vertically arranged above the sweeping pump pit, and the first proximity switch and the second proximity switch are fixed on the fixing rod in sequence from bottom to top; a horizontally arranged circular ring is also fixed on the fixing rod, the floating ball is placed in the sweeping pump pit, and the PVC pipe is movably inserted in the circular ring; The first proximity switch and the second proximity switch are electrically connected to the input end of the controller respectively, and the output end of the controller is electrically connected to the solenoid valve and the sweeping pump respectively.

2. A device for adding magnetite powder heavy medium to a coal preparation plant according to claim 1, characterized in that: The trench is opened on the ground center line of the flushing medium storage, and the ground on both sides of the trench is provided with slopes descending from the wall to the trench, and the two slopes are arranged opposite to each other; the first flushing pipe is fixed in the middle of each slope along the length direction of the trench.

3. A coal preparation plant magnetite powder heavy medium adding device according to claim 1 or 2, characterized in that: Second flushing water pipes are fixed on both side walls of the trench along the length direction, and nozzles arranged toward the trench are evenly distributed on the second flushing water pipes along the length direction. The first flushing water pipe and the second flushing water pipe located on the same side of the trench are connected through a branch pipe.

4. A device for adding magnetite powder heavy medium to a coal preparation plant according to claim 3, characterized in that: A third proximity switch is fixed on the fixing rod above the second proximity switch. The third proximity switch is electrically connected to the input end of the controller, and the output end of the controller is electrically connected to the sound and light alarm.

5. A coal preparation plant magnetite powder heavy medium adding device according to claim 1 or 2, characterized in that: The angle α between the slope and the horizontal direction is 6-10°.

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