Perimeter drive thickener blanket detection device

Abstract

The present application belongs to the technical field of thickener, and particularly relates to a peripheral drive thickener mud layer detection device, characterized in that the device comprises a support frame arranged on one side of a travelling trolley arm frame of the thickener in a forward direction, a control box arranged above the support frame, a bearing arranged at an extended end of the support frame, a rotating shaft arranged on the bearing, an angle detector arranged at an end surface of the rotating shaft, a crank arranged at a middle part of the rotating shaft, a connecting rope connected to a lower end of the crank, and a sled type bottom touch device connected to the other end of the connecting rope. The present application effectively solves the problem of continuous detection of the mud layer thickness of the peripheral drive thickener, and through real-time display of the mud layer thickness of the thickener and a change trend, production is guided to be timely adjusted, and stable operation of the thickener is ensured.

Description

Technical Field

[0001] This invention belongs to the field of thickener technology, and in particular relates to a mud layer detection device for a peripheral drive thickener. Background Technology

[0002] Peripheral drive thickeners are commonly used equipment in mineral processing. The concentration of peripheral drive thickeners is usually detected by the following two methods, but neither is ideal: (1) The traditional method is to manually test the mud layer by lowering the suspended object with a rope, visually checking the length of the rope after feeling the bottom, and estimating the mud layer height based on the depth of the thickener pool. This method relies on manual experience and operator skills, making the data inaccurate, the measurement cycle long, and the data relatively delayed, and it is not possible to detect the mud layer thickness and change trend in a timely manner. (2) The thickener pressure is usually measured by a pressure transmitter installed at the bottom of the thickener. The pressure value reflects the mud layer thickness and the material layer pressure of the thickener. Since the bottom of the pool is nearly 2m thick, and the orifice of the pressure transmitter is easily blocked by the slurry, the measured pressure does not change with the increase of the ore layer thickness, making the detection inaccurate and unable to serve as a reliable basis for production guidance.

[0003] If the abnormal increase in the thickness of the mud layer in the thickener is not detected and adjusted in time, it may cause a rake-over accident, directly affecting safe production and causing economic losses.

[0004] Therefore, it is very important to design a new type of mud layer detection device for peripheral drive thickeners to solve problems such as continuous monitoring of mud layer thickness and early warning of changes. Summary of the Invention

[0005] The purpose of this invention is to provide a detection device that can continuously detect the thickness and changing trend of the mud layer in a peripheral transmission thickener, so as to guide timely operation and adjustment in production and avoid a series of effects caused by excessive mud layer thickness.

[0006] The objective of this invention is achieved through the following technical solution: The peripheral drive thickener sludge layer detection device of the present invention includes a support frame disposed on one side of the thickener traveling trolley boom in the forward direction, a control box disposed above the support frame, a bearing disposed at the extended end of the support frame, a rotating shaft disposed on the bearing, an angle measuring instrument disposed on the end face of the rotating shaft, a crank arm disposed in the middle of the rotating shaft, a connecting rope attached to the lower end of the crank arm, and a sled-type bottom contactor connected to the other end of the connecting rope. The support frame is installed on one side of the boom of the trolley of the concentrator in the direction of travel, extends to an appropriate length, and moves in a circular motion around the central disk with the trolley.

[0007] The rotating shaft is connected to the angle measuring instrument at one end, which is an external hexagonal shaft. The angle measuring instrument is connected to the rotating shaft at the other end, which is provided with an internal hexagonal hole, so that the rotating shaft and the angle measuring instrument fit together tightly. The angle measuring instrument is fixed to the support frame by a fixing rod.

[0008] The crank arm is welded to the middle of the rotating shaft in a "T" shape.

[0009] The connecting rope is a waterproof rope.

[0010] The sled-type bottom contactor is made of stainless steel.

[0011] The controller inside the control box is connected to the angle detector via a shielded instrument cable.

[0012] Advantages of this invention: The mud layer detection device for peripheral drive thickeners of the present invention effectively solves the problem of continuous mud layer thickness detection in peripheral drive thickeners. By displaying the mud layer thickness and its changing trend in real time, it guides timely production adjustments and ensures stable operation of the thickener. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention.

[0014] Figure 2 For the present invention Figure 1 A magnified view of part I.

[0015] Figure 3 This is a schematic diagram illustrating the specific detection process of the present invention. Detailed Implementation

[0016] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0017] like Figure 1 , 2 As shown in Figure 3, the peripheral drive thickener mud layer detection device of the present invention includes a support frame 2 disposed on one side of the thickener traveling trolley boom 3 in the forward direction, a control box 1 disposed above the support frame 2, a bearing 7 disposed at the extended end of the support frame 2, a rotating shaft 6 disposed on the bearing 7, an angle measuring instrument 8 disposed on the end face of the rotating shaft 6, a crank arm 10 disposed in the middle of the rotating shaft 6, a connecting rope 4 attached to the lower end of the crank arm 10 to minimize angle errors caused by the rope attachment method, and a sled-type bottom contactor 5 connected to the other end of the connecting rope 4. The sled-type bottom contactor 5 is designed in the shape of a sled to prevent it from penetrating deep into the mud layer and reduce obstruction during the travel process. At the same time, it relies on its weight to ensure bottom contact, and is connected to the crank arm 10 through the connecting rope 4. The length from the rotating shaft 6 to the sled-type bottom contactor 5 is measured as L. 绳长， Make L绳长 Slightly longer than the distance from the rotating shaft 6 to the vertical bottom of the pool, it is necessary to ensure that the sled-type bottom contactor 5 touches the bottom, but also to prevent it from dragging too far behind the vertically below the rotating shaft, thus avoiding collision with the underwater rake frame.

[0018] The support frame 2 is installed on one side of the boom 3 of the trolley of the concentrator in the forward direction, extends to an appropriate length, and moves in a circle around the central disk 11 with the trolley.

[0019] The support frame 2 moves forward with the traveling trolley boom 3, and indirectly drags the sled-type bottom plate 5 forward through the connecting rope 4. Due to gravity, the connecting rope 4 can be kept taut, which drives the rotating shaft 6 to rotate. The connecting rope 4 forms an angle α with the vertical direction, and the value is detected by the angle detector 8.

[0020] The shaft end of the rotating shaft 6 connected to the angle measuring instrument 8 is an external hexagonal shaft, and the connection end of the angle measuring instrument 8 and the rotating shaft 6 is provided with an internal hexagonal hole, so that the rotating shaft 6 and the angle measuring instrument 8 can fit tightly together. The angle measuring instrument 8 is fixed on the support frame 2 by a fixing rod 9.

[0021] The crank arm 10 is welded to the middle of the rotating shaft 6 in a "T" shape.

[0022] The connecting rope 4 is a waterproof rope.

[0023] The sled-type bottom contactor 5 is made of stainless steel.

[0024] The controller inside the control box 1 is connected to the angle detector 8 via a shielded instrument cable.

[0025] The controller inside control box 1 detects the angle α between the connecting rope 4 and the vertical direction using the angle detector 8, and then uses the formula H... 深 =L 绳长 Using ×cosα as a logical operation, the depth of the detection sled-type bottom contactor 5 relative to the rotating axis 6 can be calculated. The detection depth H0 of the first run after cleaning the bottom of the maintenance pool is used as the reference pool depth, i.e., H0=L. 绳长 ×cosα0. After operation, as the mud layer thickens, the real-time detection depth is H. i According to H 泥厚 =H0-H i The thickness of the mud layer can then be calculated.

[0026] According to formula L 滞后 =L 绳长 By performing a logical operation on ×sinα, the hysteresis distance between the sled-type bottom contactor 5 and the rotating axis 6 can be calculated.

[0027] The display on control box 1 can intuitively show the sludge layer thickness value in the thickener, and can also display the sludge layer thickness value and change curve for several consecutive weeks in conjunction with the trolley position information, which can be used to judge the sludge layer thickness and change trend. It can also set sludge layer thickness alarm thresholds and sludge layer thickness change rate alarm thresholds, and set an alarm function to issue when the thresholds are exceeded.

[0028] This device has a simple structure, is easy to maintain and operate, and can be easily controlled remotely or locally. It can also continuously monitor the sludge thickness and its changing trend in the surrounding drive thickener, guiding timely adjustments to production and avoiding a series of problems caused by excessively thick sludge layers.

[0029] A specific example using a φ53 meter thickener: 1. Fabricate support frame 2, and install support frame 2 on (e.g., Figure 1 As shown in the figure, the boom 3 of the traveling trolley of the concentrator extends 4 meters long on one side in the forward direction.

[0030] 2. Install bearing 7 using conventional methods (such as...) Figure 1 As shown in the figure, a rotating shaft 6 and an angle measuring instrument 8 are installed sequentially on the extended end of the support frame 2; the rotating shaft 6 and the angle measuring instrument 8 can fit together tightly; the angle measuring instrument 8 is fixed on the support frame 2 by a fixing rod 9.

[0031] 3. The rotating shaft 6 and the crank arm 10 are welded in a "T" shape, and the lower end of the "T" is tied with a connecting rope 4.

[0032] 4. The distance L from the bottom of the thickener to the rotating shaft was measured using a plumb bob. 铅直 =6 meters, connecting rope 4 is a waterproof rope, and L 绳长 Compared to L 铅直 0.5 meters long, i.e., L 绳长 =6.5 meters.

[0033] 5. Select stainless steel to make the bottoming device according to the sled-type bottoming device 5, and connect it to the crank arm 10 through the connecting rope 4.

[0034] 6. Control box 1 is made of stainless steel and is mounted on support frame 2 (e.g., Figure 1 As shown in the diagram, the controller inside the box is connected to the angle detector 8 via a shielded instrument cable.

[0035] 7. System Parameter Settings. Program according to the following logic, based on the included angle α (α=22.61986) detected and fed back by angle detector 8. 0 ), set H 深 =L 绳长 ×cosα; Set H0 (H0=6.5×cos22.61986) 0 =6 meters) is the baseline pool depth, H iTo detect depth in real time, set H 泥厚 =H0-H i Set the relative position L of the sled-type bottom contactor 5. 滞后 =L 绳长 ×sinα. A trend control is used to set the mud layer thickness change curve. The alarm threshold for mud layer thickness at the detection point is set to 1 meter, and the alarm threshold for mud layer thickness change rate is set to 0.08 meters / cycle.

[0036] 8. System testing: After cleaning the bottom of the maintenance pool, the first run of the system tested the included angle α = 22.61986. 0 Depth H0 = 6.5 × cos22.61986 0 =6 meters, H0 is used as the baseline pool depth and recorded in memory. As the mud layer thickens, the system feedback angle α during detection is 37.59831. 0 , Depth H i =6.5×cos37.59831=5.150 meters, H 泥厚 =6 - 5.15 = 0.85 meters L 滞后 =6.5 × sin37.59831 = 3.965 meters Feedback angle α = 39.71514 0 At that time, H 泥厚 =1 meter, the system triggers an alarm.

[0037] 9. The device has a simple structure, is easy to maintain and operate, and can be easily controlled remotely or locally.

[0038] The mud layer detection device for peripheral drive thickeners of the present invention effectively solves the problem of continuous mud layer thickness detection in peripheral drive thickeners. By displaying the mud layer thickness and its changing trend in real time, it guides timely production adjustments and ensures stable operation of the thickener.

Claims

1. A mud layer detection device for a peripheral drive thickener, characterized in that, The system includes a support frame mounted on one side of the boom of the thiocyanate trolley in the forward direction, a control box mounted above the support frame, a bearing mounted on the extended end of the support frame, a rotating shaft mounted on the bearing, an angle measuring instrument mounted on the end face of the rotating shaft, a crank arm mounted in the middle of the rotating shaft, a connecting rope attached to the lower end of the crank arm, and a sled-type bottom contactor connected to the other end of the connecting rope. The support frame is installed on one side of the boom of the trolley of the concentrator in the direction of travel, extends to an appropriate length, and moves in a circular motion around the central disk with the trolley.

2. The mud layer detection device for a peripheral drive thickener according to claim 1, characterized in that, The rotating shaft is connected to the angle measuring instrument at one end, which is an external hexagonal shaft. The angle measuring instrument is connected to the rotating shaft at the other end, which is provided with an internal hexagonal hole, so that the rotating shaft and the angle measuring instrument fit together tightly. The angle measuring instrument is fixed to the support frame by a fixing rod.

3. The mud layer detection device for a peripheral drive thickener according to claim 1, characterized in that, The crank arm is welded to the middle of the rotating shaft in a "T" shape.

4. The mud layer detection device for a peripheral drive thickener according to claim 1, characterized in that, The connecting rope is a waterproof rope.

5. The mud layer detection device for a peripheral drive thickener according to claim 1, characterized in that, The sled-type bottom contactor is made of stainless steel.

6. The mud layer detection device for a peripheral drive thickener according to claim 1, characterized in that, The controller inside the control box is connected to the angle detector via a shielded instrument cable.

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