Liquid level measuring device for flotation machine

Abstract

The liquid level measuring device comprises a measuring cover (2), a radar liquid level meter (1), a fresh water inlet pipe (3), a compressed air inlet pipe (4) and the like, the measuring cover (2) is installed in a groove body of the flotation machine through a supporting frame, the radar liquid level meter (1) is fixed to the upper end of the measuring cover (2), the lower end of the measuring cover (2) is open, and bar grid holes (20) are formed in the lower end of the measuring cover (2) at intervals to form a comb-shaped bar grid structure; one end of the fresh water inlet pipe (3) is connected with a water source, and the other end enters the measuring cover (2) and is connected with the fresh water nozzle (31) to clean the inner side wall of the measuring cover (2); one end of the compressed air inlet pipe (4) is connected with an air compressor, and the other end of the compressed air inlet pipe (4) enters the measuring cover (2) and is connected with the compressed air nozzle (41) of the measuring cover (2), so that the bar grid hole (20) can be purged. Therefore, the influence of the foam on the liquid level meter can be avoided, and the influence of the foam attached to the wall of the liquid level meter on measurement can be avoided, so that the accuracy of liquid level measurement data is ensured.

Description

Technical Field

[0001] The utility model relates to flotation equipment, in particular to the structure of a liquid level measuring device used for a flotation machine. Background Art

[0002] Flotation machine is the abbreviation of flotation concentrator, which is a mechanical equipment used in the flotation process. The original ore pulp and specific reagents are added to the flotation machine for aeration and stirring, so that the specific components in it adhere to the foam and float to the surface of the ore pulp. The foam and ore pulp are separated by scraping, thereby achieving the separation of the components in the ore pulp.

[0003] During the mineral flotation process, the liquid level of the flotation slurry needs to be measured and controlled.

[0004] However, due to the presence of a large amount of flotation foam on the surface of the flotation slurry, it will affect the signal of non-contact level gauges such as radar level gauges, resulting in the inability to accurately measure the liquid level. In addition, due to the strong adhesion of flotation foam and the presence of a large amount of flotation materials and flotation reagents, it will adhere to the wall of contact level gauges such as scale level gauges, interfering with the signal and directly affecting the accuracy and timeliness of liquid level measurement.

[0005] That is to say, affected by the flotation foam, it is difficult to accurately and timely measure the liquid level of the flotation slurry regardless of whether a non-contact liquid level meter such as a radar level meter or a contact liquid level meter such as a scale level meter is used, resulting in untimely or deviation in the liquid level control of the flotation machine. Utility Model Content

[0006] The utility model aims to solve the problem that the existing liquid level meter is difficult to accurately and timely measure the liquid level of the flotation slurry in the flotation machine due to the flotation foam with strong adhesion on the surface of the flotation slurry in the flotation machine.

[0007] For the above purpose, the utility model provides a liquid level measuring device for a flotation machine, wherein the flotation machine has a tank body filled with flotation slurry, including a measuring cover 2, a radar level gauge 1, a fresh water inlet pipe 3, a fresh water nozzle 31, a fresh water valve 32, a compressed air inlet pipe 4, a compressed air nozzle 41, and a compressed air valve 42.

[0008] The measuring cover 2 is installed in the tank body by a fixed or movable support frame. The measuring cover 2 is a straight cylinder with a closed upper end and an open lower end. The radar level meter 1 is fixed on the upper end of the measuring cover 2.

[0009] The lower end of the side wall of the measuring cover 2 is provided with a plurality of long vertical through grooves as bar grid holes 20 at intervals to form a comb-shaped bar grid structure. The lower end of the measuring cover 2 is immersed in the flotation slurry.

[0010] One end of the fresh water inlet pipe 3 is connected to a water source, and the other end enters the measuring cover 2 and is connected to a fresh water nozzle 31 located above the inside of the measuring cover 2 .

[0011] The fresh water nozzle 31 sprays fresh water toward the inner wall of the measurement cover 2 .

[0012] The fresh water valve 32 is disposed on the fresh water inlet pipe 3 to control the on-off of the fresh water inlet pipe 3 .

[0013] One end of the compressed air inlet pipe 4 is connected to the air compressor, and the other end enters the measuring cover 2 and is connected to the compressed air nozzle 41 located above the inside of the measuring cover 2 .

[0014] The compressed air nozzle 41 sprays compressed air toward the grille holes 20 .

[0015] The compressed air valve 42 is disposed on the compressed air inlet pipe 4 to control the opening and closing of the compressed air inlet pipe 4 .

[0016] When measuring the flotation slurry level, the fresh water valve 32 is opened first, and a small amount of fresh water is sprayed from the fresh water nozzle 31 to clean the inner wall of the measuring cover 2, remove the flotation foam adhering to the inner wall of the measuring cover 2, and then close the fresh water control valve 1.

[0017] Afterwards, the air compressor and the compressed air valve 42 are turned on to blow away the flotation foam in the measuring cover 2 with compressed air, that is, the foam is blown out of the measuring cover 2 from the bar grid holes 20, and then the compressed air control valve 2 is closed.

[0018] Afterwards, the measurement signal sent by the radar level meter 1 can directly act on the flotation slurry surface to be measured, eliminating the interference of foam on the measurement, and the obtained level measurement data is accurate and timely.

[0019] Preferably, the radar level meter 1, the fresh water valve 32 and the compressed air valve 42 are interlocked to realize automatic control, so that the acquisition of liquid level measurement data is more timely and labor-saving.

[0020] Preferably, the fresh water valve 32 and the compressed air valve 42 are respectively provided with a delay time controller for controlling the opening time of the fresh water valve 32 and the compressed air valve 42, so that the usage of fresh water and compressed air can be controlled to prevent them from affecting flotation production.

[0021] Preferably, the measuring cover 2 is fixedly arranged on the inner upper side of the trough body by a supporting frame, so that the fixing structure is simple and the cost is low.

[0022] Preferably, the measuring cover 2 is connected to a buoyancy box 5 capable of floating on the flotation slurry through a support frame, the fresh water inlet pipe 3 is connected to the water source through a first hose, and the compressed air inlet pipe 4 is connected to the air compressor through a second hose, that is, the measuring cover 2 can move up and down with the liquid level of the flotation slurry, so that the liquid level of the flotation slurry to be measured is always located at the bottom of the bar grid hole 20, leaving sufficient channels for cleaning and blowing.

[0023] In summary, the present invention uses a radar level meter 1 and a measuring cover 2 and other accessories to form a level measuring device for a flotation machine. First, it can avoid the influence of foam on the level meter; second, it can avoid the foam adhering to the wall of the level meter and affecting the measurement, thereby ensuring the accuracy of the level measurement data. Through practical application, the effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an illustration of the external structure of a liquid level measuring device for a flotation machine;

[0025] Figure 2 It is a diagram illustrating the internal structure of a liquid level measuring device used in a flotation machine;

[0026] Figure 3 This is a diagram illustrating the state of the liquid level measuring device of the flotation machine with foam before flushing and blowing;

[0027] Figure 4 This is an explanatory diagram of a modified example of a liquid level measuring device for a flotation machine, which floats on the liquid surface when in use. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. The following description is a concretization of the claims of the present invention.

[0029] Example

[0030] Figure 1 and Figure 2 The external structure and internal structure of the liquid level measuring device for a flotation machine are shown respectively. Figure 3 The figure shows the state of the liquid level measuring device of the flotation machine with foam before flushing and blowing.

[0031] Combination Figure 1 , Figure 2 From the perspective of FIG. 1 , the liquid level measuring device for the flotation machine includes: a measuring cover 2 , a radar level gauge 1 , a fresh water inlet pipe 3 , a fresh water nozzle 31 , a fresh water valve 32 , a compressed air inlet pipe 4 , a compressed air nozzle 41 , and a compressed air valve 42 .

[0032] like Figure 1As shown, the measuring cover 2 is in a straight cylindrical shape, with a closed upper end and an open lower end. The radar level meter 1 is fixed on the upper end of the measuring cover 2 , and the signal transmitting end is located inside the measuring cover 2 .

[0033] A plurality of long strip-shaped through grooves as bar grid holes 20 are provided on the lower side wall of the measuring cover 2, and the spacing between adjacent bar grid holes 20 is equal, forming a comb-shaped bar grid structure. The bar grid holes 20 extend upward from the lower end of the measuring cover 2, and their length is at least two-thirds of the length of the measuring cover 2, so that the measuring cover 2 can block the flotation foam to a certain extent and provide a channel for discharging the flotation foam.

[0034] The measuring cover 2 is installed in a tank body (not shown in the figure) of the flotation machine for filling the flotation slurry by a support frame. In this embodiment, the measuring cover 2 is fixedly arranged on the inner upper side of the tank body by a support frame (not shown in the figure), so that the lower end of the measuring cover 2 is immersed in the flotation slurry.

[0035] like Figures 1 to 3 As shown, one end of the fresh water inlet pipe 3 is connected to the water source, and the other end enters the measuring cover 2 and is connected to the fresh water nozzle 31 located above the inside of the measuring cover 2. The fresh water nozzle 31 sprays fresh water toward the measuring cover 2. The fresh water valve 32 is a pneumatic valve, which is arranged on the fresh water inlet pipe 3 to control the opening and closing of the fresh water inlet pipe 3.

[0036] One end of the compressed air inlet pipe 4 is connected to an air compressor (not shown in the figure), and the other end enters the measuring cover 2 and is connected to the compressed air nozzle 41 located above the inner part of the measuring cover 2. The fresh water nozzle 31 sprays compressed air toward the bar grid holes 20. The compressed air valve 42 is a pneumatic valve, which is arranged on the compressed air inlet pipe 4 to control the opening and closing of the compressed air inlet pipe 4.

[0037] The radar level gauge 1 , the fresh water valve 32 and the compressed air valve 42 are interlocked, and the fresh water valve 32 and the compressed air valve 42 are respectively provided with delay time controllers for controlling the opening time of the fresh water valve 32 and the compressed air valve 42 .

[0038] See also Figure 3 During the flotation process, the liquid level 50 of the flotation slurry submerges the lower end of the measuring cover 2 , and there are a lot of flotation foams on the liquid level 50 .

[0039] When measuring the flotation slurry level, the fresh water valve 32 is opened first, and a small amount of fresh water is sprayed from the fresh water nozzle 31 to clean the inner wall of the measuring cover 2, remove the flotation foam adhering to the inner wall of the measuring cover 2, and then close the fresh water control valve 1.

[0040] Afterwards, the air compressor and the compressed air valve 42 are turned on to blow away the flotation foam in the measuring cover 2 with compressed air, that is, the foam is blown out of the measuring cover 2 from the bar grid holes 20, and then the compressed air control valve 2 is closed.

[0041] Afterwards, the measurement signal sent by the radar level meter 1 can directly act on the flotation slurry surface to be measured, eliminating the interference of foam on the measurement, and the obtained level measurement data is accurate and timely.

[0042] Modifications

[0043] Figure 4 A modified example of the liquid level measuring device for a flotation machine is shown floating on the liquid surface during use.

[0044] As shown in the figure, the structure of the liquid level measuring device for the flotation machine in this variant is basically the same as that in the embodiment, with the only difference being that the measuring cover 2 is connected to a float box 5 capable of floating on the flotation slurry surface 50 through a support frame, the fresh water inlet pipe 3 is softly connected to the water source through a first hose 30, and the compressed air inlet pipe 4 is softly connected to the air compressor through a second hose 40.

[0045] Therefore, the measuring cover 2 and the radar level meter 1 can move up and down with the liquid level of the flotation slurry, so that the liquid surface of the flotation slurry to be measured is always located below the bar grid holes 20, leaving sufficient channels for cleaning and purging.

[0046] In summary, the present invention uses a radar level meter 1 and a measuring cover 2 and other accessories to form a level measuring device for a flotation machine. First, it avoids the influence of foam on the level meter; second, it avoids the foam adhering to the wall of the level meter and affecting the measurement, thereby ensuring the accuracy of the level measurement data. Through practical application, the effect is good.

Claims

1. A level measuring device for a flotation machine having a tank filled with flotation slurry, characterized in that: It comprises a measuring cover (2), a radar level gauge (1), a fresh water inlet pipe (3), a fresh water nozzle (31), a fresh water valve (32), a compressed air inlet pipe (4), a compressed air nozzle (41), and a compressed air valve (42). The measuring cover (2) is installed in the tank body by a fixed or movable support frame. The measuring cover (2) is a straight cylinder with a closed upper end and an open lower end. The radar level meter (1) is fixed on the upper end of the measuring cover (2). The lower end of the side wall of the measuring cover (2) is provided with a plurality of long vertical through grooves as bar grid holes (20) at intervals to form a comb-shaped bar grid structure. The lower end of the measuring cover (2) is immersed in the flotation slurry. One end of the fresh water inlet pipe (3) is connected to a water source, and the other end enters the measuring cover (2) and is connected to a fresh water nozzle (31) located above the inside of the measuring cover (2). The fresh water nozzle (31) sprays fresh water toward the inner wall of the measuring cover (2). The fresh water valve (32) is arranged on the fresh water inlet pipe (3) to control the opening and closing of the fresh water inlet pipe (3). One end of the compressed air inlet pipe (4) is connected to the air compressor, and the other end enters the measuring cover (2) and is connected to the compressed air nozzle (41) located above the inside of the measuring cover (2). The compressed air nozzle (41) sprays compressed air toward the grille holes (20). The compressed air valve (42) is arranged on the compressed air inlet pipe (4) to control the opening and closing of the compressed air inlet pipe (4).

2. The liquid level measuring device for a flotation machine according to claim 1, characterized in that: The radar level meter (1), the fresh water valve (32) and the compressed air valve (42) are interlocked.

3. The liquid level measuring device for a flotation machine according to claim 2, characterized in that: The fresh water valve (32) and the compressed air valve (42) are respectively provided with a delay time controller for controlling the opening time of the fresh water valve (32) and the compressed air valve (42).

4. The liquid level measuring device for a flotation machine according to any one of claims 1 to 3, characterized in that: The measuring cover (2) is fixedly arranged on the inner upper side of the tank body via a support frame.

5. The liquid level measuring device for a flotation machine according to any one of claims 1 to 3, characterized in that: The measuring cover (2) is connected to a buoyancy box (5) capable of floating on the flotation slurry via a support frame, the fresh water inlet pipe (3) is connected to the water source via a first hose, and the compressed air inlet pipe (4) is connected to the air compressor via a second hose.

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