Mud layer interface indicating device

Abstract

The present invention provides a mud layer interface indicator device, comprising a thickener, a main shaft, and a sled-type measuring device. The main shaft is positioned at the center of the thickener, and the sled-type measuring device is connected to the main shaft and rotates within the thickener. Based on the actual operating conditions of the thickener, the sled-type measuring device hovers when the supporting force of the mud layer and gravity reach equilibrium as it slides within the mud layer. (The deeper the mud layer, the greater the yield stress, and the greater the supporting force on the sled-type measuring device due to sliding.) The position of the mud layer interface is determined by the depth of the sled-type measuring device, eliminating the technical drawback of inaccurate mud layer interface measurements by existing measurement methods.

Description

Technical Field

[0001] The present invention relates to the technical field of mining machinery, and in particular to a mud layer interface indicating device. Background Art

[0002] Thickeners are widely used in mining, chemical industry, environmental protection and other fields. Their main function is to settle and concentrate the slurry fed into the thickener. The sludge with higher concentration is discharged from the bottom of the thickener, and the clarified water is discharged through overflow.

[0003] During thickener production, monitoring the position of the interface between the mud layer and water is a crucial parameter for proper thickener operation. The density of the thickener bed increases gradually from top to bottom, and there's no clear demarcation between the mud and water layers. Therefore, we can only measure the equivalent thickness of the bed (i.e., where the mud concentration or yield stress reaches a certain value). The mud interface is typically measured using ultrasonic measurement, a weight level meter, and indirect pressure measurement. However, the unclear mud-water interface and the presence of a deep transition layer between the water and mud significantly impact the accuracy of ultrasonic measurement. The weight level meter's measurements are intermittent and cannot reflect real-time interface changes. Pressure transmitters installed near the vessel wall can easily cause inactive slurry to compact at the pressure transmitter's mounting location, resulting in inaccurate pressure measurements. Summary of the Invention

[0004] The object of the present invention is to provide a mud layer interface indicating device, which can more accurately measure the interface position between the mud layer and water.

[0005] The solution of the present invention is as follows: A mud layer interface indication device includes: a thickening tank, a main shaft and a sled-type measuring device, wherein the main shaft is arranged at the center of the thickening tank, the sled-type measuring device is connected to the main shaft and rotates in the thickening tank following the main shaft.

[0006] Preferably, the sled type measuring device includes: a supporting device, a guide rod and a sled plate, the supporting device is arranged on the main shaft and arranged perpendicular to the main shaft, the guide rod is movably connected to the supporting device, and the sled plate is arranged at the end of the guide rod.

[0007] Preferably, the supporting device includes a bracket, the bracket is provided with a channel, and the guide rod is slidingly connected to the bracket through the channel.

[0008] Preferably, the supporting device includes a connecting rod and a hinge, one end of the connecting rod is connected to the main shaft through the hinge, and the other end is connected to the guide rod through the hinge.

[0009] Preferably, the skid plate is arranged horizontally or the front end is tilted upward.

[0010] Preferably, a scale is provided on the top surface of the guide rod, and a position sensor is provided on the guide rod, and the position sensor converts the position information of the sled plate into an electrical signal or a digital signal.

[0011] Preferably, the surface of the guide rod is provided with a scale.

[0012] Preferably, it further comprises a counterweight device, wherein the counterweight device is connected to the sled-type measuring device.

[0013] Preferably, the counterweight device includes: a counterweight, a pulley and a sling, the counterweight is suspended on the pulley via the sling, and the pulley is provided on the supporting device.

[0014] Preferably, the average specific gravity of the material used to make the ski board may be greater than or less than that of water.

[0015] Compared with the prior art, the present invention has the following advantages: 1) it can accurately measure the position of the mud layer; 2) it can realize the continuous measurement work; and 3) it can reduce the failure rate of the measuring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the internal structure of the mud layer interface indicator device according to an embodiment of the present invention;

[0018] Figure 2 Schematic diagram of the hinged installation of the main shaft and the guide rod according to an embodiment of the present invention.

[0019] Description of reference numerals:

[0020] 1: thickening tank; 2: water interface; 3: main shaft; 4: mud layer interface; 5: guide rod; 6: bracket; 7: pulley; 8: counterweight device; 9: skid plate; 10: hinge; 11: connecting rod. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" and the like to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0024] like Figure 1 and Figure 2 As shown, the present invention provides a mud layer interface indicator device, comprising: a thickening tank 1, a main shaft 3, and a sled-type measuring device. The main shaft 3 is disposed at the center of the thickening tank 1. The sled-type measuring device is connected to the main shaft 3 and rotates within the thickening tank 1 along with the main shaft 3. Water and mud will separate into layers in the thickening tank 1, forming a distinct boundary: a water interface 2 at the top and a mud layer interface 4 at the bottom.

[0025] When sliding through the mud layer, the sled-type measuring device hovers when the supporting force of the mud layer and gravity reach equilibrium (the deeper the mud layer, the greater the yield stress, and the greater the supporting force on the sled-type measuring device due to sliding). Therefore, the depth of the sled-type measuring device can be used to determine the location of the mud layer interface. The depth at which the sled-type measuring device hovers is considered the effective height of the bed layer.

[0026] In some more preferred embodiments, the sled-type measuring device includes: a support device, a guide rod 5, and a sled plate 9. The support device is disposed on the main shaft 3 and arranged perpendicular to the main shaft 3, the guide rod 5 is movably connected to the support device, and the sled plate 9 is disposed at the end of the guide rod 5.

[0027] In some embodiments, the support device includes a bracket 6 having a channel formed therein, through which the guide rod 5 is slidably connected to the bracket 6. This means that the guide rod 5 can slide up and down within the channel. In other embodiments, the support device includes a connecting rod 11 and a hinge 10. One end of the connecting rod 11 is connected to the main shaft 3 via the hinge 10, and the other end is connected to the guide rod 5 via the hinge 10. The support device of the present invention includes but is not limited to the aforementioned embodiments.

[0028] In some more preferred embodiments, the skid 9 is set horizontally or the front end is tilted upward. If the skid 9 is set horizontally, its cross-sectional shape can be a wing-shaped, and it can also generate lift when it moves horizontally, thereby achieving a hovering effect. If the front end of the skid 9 is tilted upward, its cross-section is one of linear, arc-shaped, semicircular, elliptical or wing-shaped, or other shapes that can generate a supporting force when moving in the mud layer. Since the resistance of the skid 9 to movement in the mud layer is greater than the resistance to movement in clear water, and the skid 9 has a certain gravity, the skid 9 with the front end tilted upward will keep moving on the mud layer interface. The guide rod 5 and the skid 9 are fixed together and can slide up and down along the channel on the bracket 6.

[0029] In some more preferred embodiments, the top surface of the guide rod 5 is provided with a scale to directly read the mud layer height, and a position sensor is provided on the guide rod 5 to convert the position information of the skid 9 into an electrical or digital signal. The mud layer height can be determined by the height of the guide rod 5 above the water surface. Alternatively, the position sensor can monitor the height of the end of the guide rod 5 to measure the mud layer height, thereby achieving automatic control of mud layer measurement. The position sensor can be ultrasonic or radar.

[0030] In some preferred embodiments, to prevent excessive weight on the sled 9, a counterweight device 8 is further included. The counterweight device 8 is connected to the sled-type measuring device. The counterweight device 8 comprises a counterweight, a pulley 7, and a sling. The counterweight is suspended from the pulley 7 via the sling, and the pulley 7 is mounted on a support device. The average specific gravity of the material used to make the sled 9 can be greater than or less than water. The counterweight is used to partially balance the weight of the sled 9 and the guide rod 5.

[0031] The operating principle of the present invention is as follows: a sled-type measuring device is mounted on the main shaft 3, with the sled plate 9 naturally hanging down at its lowest position. When the thickener begins operation, the sled plate 9 moves around the main shaft 3 within the mud layer, creating a supporting force on the sled plate 9. This force causes the sled plate 9 to rise to a certain height and then hover. The guide rod 5 then indicates the equivalent thickness of the mud layer. The mud layer height can be read using a scale or a signal from a position sensor. As the thickness or density of the mud layer in the thickener changes, the hovering height of the sled plate 9 automatically changes accordingly.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mud layer interface indicator device, characterized in that: include: A concentration tank (1), a main shaft (3), and a sled-type measuring device, wherein the main shaft (3) is arranged at the center of the concentration tank (1), and the sled-type measuring device is connected to the main shaft (3) and rotates within the concentration tank (1) following the main shaft (3); The sled type measuring device comprises: a supporting device, a guide rod (5) and a sled plate (9), wherein the supporting device is arranged on the main shaft (3) and is arranged perpendicular to the main shaft (3), the guide rod (5) is movably connected to the supporting device, and the sled plate (9) is arranged at the end of the guide rod (5); the supporting device comprises a bracket (6), a hole is provided on the bracket (6), and the guide rod (5) and the bracket (6) are slidably connected through the hole; the supporting device comprises a connecting rod (11) and a hinge (10), one end of the connecting rod (11) is connected to the hinge (10) ) is connected to the main shaft (3), and the other end is connected to the guide rod (5) through the hinge (10); the top surface of the guide rod (5) is provided with a scale, and a position sensor is provided on the guide rod (5), and the position sensor converts the position information of the sled (9) into an electrical signal or a digital signal; it also includes a counterweight device (8), and the counterweight device (8) is connected to the sled type measuring device; the counterweight device (8) includes: a counterweight, a pulley (7) and a sling, the counterweight is suspended on the pulley (7) through the sling, and the pulley (7) is provided on the supporting device.

2. The mud layer interface indicator device according to claim 1, characterized in that: The skid plate (9) is arranged horizontally or with its front end tilted upward.

3. The mud layer interface indicator device according to claim 2, characterized in that: The front end of the skid plate (9) is tilted upward, and its cross section is one of a linear shape, an arc shape, or an airfoil shape.

4. The mud layer interface indicator device according to claim 1, characterized in that: The average specific gravity of the material used to make the skid plate (9) is greater than or less than water.

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