Liquid level measuring device applied to flotation tank

Abstract

The invention relates to the technical field of liquid level measurement, and provides a liquid level measuring device applied in a flotation cell, the liquid level measuring device comprises a flotation liquid level sensor, an automatic adjusting module and a mounting rack, the end part of the flotation liquid level sensor is provided with a screw joint rod and an inclination sensor, and the automatic adjusting module comprises an adjusting part and a control part; the adjusting part comprises a driving gear, a threaded pipe and a transmission gear, the transmission gear is connected with the threaded pipe, the threaded connection rod is in threaded connection in the threaded pipe, the transmission gear is in transmission connection with the driving gear, the threaded pipe is connected with the mounting frame, and the three sets of electromagnets, the threaded connection rod and the threaded pipe are symmetrically distributed about the axis of the flotation liquid level sensor. The perpendicularity of the flotation liquid level sensor can be automatically corrected from the position of each mounting point under the condition that the stable connection relation among the screw joint rods, the three groups of threaded pipes and the surface of the mounting frame is ensured and the capacity of the automatic adjusting module for adjusting the displacement of any group of screw joint rods is matched; and the measurement precision of the flotation liquid level sensor is improved.

Description

Technical Field

[0001] The invention relates to the technical field of liquid level measurement, and in particular to a liquid level measuring device used in a flotation tank. Background Art

[0002] The flotation tank is a device used for mineral separation. The liquid inside the flotation tank is usually flowing. The flotation level sensor (resistance level sensor) is an important device for monitoring the change of the liquid level in the flotation tank. It is usually composed of multiple electrode rings. These electrodes are immersed in the liquid. When the liquid level rises or falls, the number of electrodes immersed in the liquid will change, resulting in changes in the resistance value between the electrodes. By measuring the resistance value, the liquid level height can be calculated, so the verticality of the flotation level sensor is an important factor to ensure its measurement accuracy.

[0003] Existing liquid level sensors generally include a built-in sensor, an automatic adjustment bracket, and a matching feedback control system and software calibration system. The automatic adjustment bracket is generally fixed to the liquid level sensor by bolts. However, the automatic adjustment bracket still has the following defects: (1) The angle adjustment range is limited, and it is impossible to monitor and adjust the displacement of each bolt connection point, resulting in the liquid level sensor being unable to adjust the looseness or offset of each bolt connection point. For example, the angle-adjustable ultrasonic level meter disclosed in announcement number CN115991534B has the above problem in the adjustable bracket in this technical solution; (2) In addition to causing liquid level fluctuations, the liquid flowing inside the flotation tank will also directly impact the electrode ring when the liquid flows rapidly, thereby seriously interfering with the measurement results. Summary of the invention

[0004] The purpose of the present invention is to provide a liquid level measuring device used in a flotation tank, aiming to solve the problems existing in the existing liquid level sensor.

[0005] To achieve the above object, the present invention provides the following technical solution: a liquid level measuring device applied to a flotation tank, comprising a flotation liquid level sensor and a mounting frame, wherein a screw rod and a tilt sensor are arranged at the end of the flotation liquid level sensor, and further comprising: An automatic adjustment module, the automatic adjustment module comprises an adjustment part and a control part, the adjustment part comprises a driving gear, a threaded tube and a transmission gear, the transmission gear is connected with the threaded tube, the screw rod is threadedly connected in the threaded tube, the transmission gear is transmission-connected with the driving gear, and the threaded tube is connected with a mounting frame; The regulating part comprises an electromagnet, and the three groups of the electromagnet, the screw rod and the threaded tube are symmetrically distributed about the axis of the flotation liquid level sensor.

[0006] As a further solution of the present invention, it further includes a flow stabilizing shield, which is fixedly connected to the mounting frame. The surface of the flow stabilizing shield is provided with a diversion port. An inverted U-shaped flow stabilizing frame is fixedly connected to the inner side of the flow stabilizing shield. The inverted U-shaped flow stabilizing frame is distributed between the diversion port and the electrode ring of the flotation liquid level sensor. Since the inverted U-shaped flow stabilizing frame is open-designed along both axial sides of the flotation liquid level sensor, the water flow blocked by the inverted U-shaped flow stabilizing frame will flow along both axial sides of the flotation liquid level sensor, or in other words, the impact force of the water flow will be transmitted along both axial sides of the flotation liquid level sensor, thereby greatly weakening the impact force of the water flow on the electrode ring, ensuring the stability of the liquid level inside the flow stabilizing shield, and improving the accuracy of the flotation liquid level sensor.

[0007] As a further solution of the present invention, it further includes an automatic cleaning module. The automatic cleaning module includes an annular pipe, a cleaning valve, a suspension bracket, a winding part and a suspension rope. The cleaning valve and the suspension bracket are both fixedly connected to the annular pipe. The winding part is connected to the mounting frame. One end of the suspension rope is wound around the winding part, and the other end of the suspension rope is fixed to the suspension bracket. The suspension bracket is in sliding contact with the inverted U-shaped flow stabilizing frame.

[0008] As a further solution of the present invention, a base is fixedly connected to the end of the flotation liquid level sensor. An inclination sensor is embedded in the surface of the base. The threaded rod is fixedly connected to the base.

[0009] As a further solution of the present invention, ribs and rib grooves are respectively provided on the surfaces of the threaded pipe and the transmission gear. The ribs are in sliding connection with the rib grooves.

[0010] As a further solution of the present invention, the control part further includes a support ring, a conductive bar and a spring. The support ring is fixedly connected to the mounting frame. One end of the conductive bar is electrically connected to the electromagnet, and the other end of the conductive bar is connected to a power source. A switch unit is provided between the conductive bar and the electromagnet. The spring is connected between the support ring and the transmission gear. The transmission gear is made of metal.

[0011] As a further solution of the present invention, a sealing ring and a sealing cover are respectively fixedly connected to the surfaces of the base and the mounting frame.

[0012] The beneficial effects of the present invention: Different from the traditional automatic adjustment bracket, it can ensure a stable connection relationship between the threaded rod and the three threaded pipes and the surface of the mounting frame, and cooperate with the automatic adjustment module's ability to adjust the displacement of any one threaded rod, and can automatically correct the verticality of the flotation liquid level sensor from the position of each installation point, improving the measurement accuracy of the flotation liquid level sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a perspective view of the present invention.

[0014] Figure 2 This is a perspective view of the flotation liquid level sensor according to an embodiment of the present invention.

[0015] Figure 3 This is a disassembly and assembly schematic diagram of the automatic adjustment module and the flotation liquid level sensor according to an embodiment of the present invention.

[0016] Figure 4 This is an assembly drawing of the automatic adjustment module and the flotation liquid level sensor according to an embodiment of the present invention.

[0017] Figure 5 This is a perspective view of the automatic cleaning module according to an embodiment of the present invention.

[0018] Figure 6 This is a front sectional view of the connection between the present invention and the mounting bracket.

[0019] Figure 7 This is a bottom view of the present invention.

[0020] Reference numerals: 1 - flotation liquid level sensor, 11 - base, 12 - screw rod, 13 - tilt sensor, 14 - sealing ring; 2 - automatic adjustment module, 21 - adjustment part, 211 - drive gear, 212 - threaded tube, 213 - transmission gear, 214 - rib, 22 - control part, 221 - electromagnet, 222 - support ring, 223 - conductive bar, 224 - spring; 3 - mounting bracket, 31 - sealing cover; 4 - steady flow protection cover, 41 - diversion port, 42 - U-shaped steady flow frame; 5 - automatic cleaning module, 51 - annular tube, 52 - cleaning valve, 53 - suspension bracket, 54 - winding part, 55 - suspension rope, 56 - pipe joint. Detailed implementation manners

[0021] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0023] Please refer to Figures 1 to 6 , in an embodiment of the present invention, a liquid level measuring device applied to a flotation cell includes a flotation liquid level sensor 1 and a mounting bracket 3. A screw rod 12 and a tilt sensor 13 are provided at the end of the flotation liquid level sensor 1. The device further includes: The automatic adjustment module 2 includes an adjustment unit 21 and a control unit 22. The adjustment unit 21 includes a driving gear 211, a threaded tube 212 and a transmission gear 213. The transmission gear 213 is connected to the threaded tube 212. The threaded rod 12 is threadedly connected in the threaded tube 212. The transmission gear 213 is in transmission connection with the driving gear 211. The threaded tube 212 is connected to the mounting bracket 3. The adjusting part 21 includes an electromagnet 221 , and the three groups of the electromagnet 221 , the screw rod 12 and the threaded tube 212 are symmetrically distributed about the axis of the flotation liquid level sensor 1 .

[0024] See also Figure 2 Furthermore, the end of the flotation level sensor 1 is fixedly connected to a base 11 , a tilt sensor 13 or an accelerometer is embedded in the surface of the base 11 , and a screw rod 12 is fixedly connected to the base 11 .

[0025] See also Figure 3 and Figure 4 Furthermore, the surfaces of the threaded tube 212 and the transmission gear 213 are respectively provided with ribs 214 and rib grooves, and the ribs 214 are slidably connected to the rib grooves.

[0026] See also Figure 3 and Figure 4 Furthermore, the control unit 22 also includes a support ring 222, a conductive strip 223 and a spring 224. The support ring 222 is fixedly connected to the mounting frame 3. One end of the conductive strip 223 is electrically connected to the electromagnet 221. The other end of the conductive strip 223 is connected to a power module. A switch unit is provided between the conductive strip 223 and the electromagnet 221. The spring 224 is connected between the support ring 222 and the transmission gear 213. The transmission gear 213 is made of metal. The electromagnet 221 can magnetically absorb the transmission gear 213 after being energized.

[0027] See also Figure 2 and Figure 6 Furthermore, a sealing ring 14 and a sealing cover 31 are fixedly connected to the surface of the base 11 and the mounting frame 3, respectively. The sealing ring 14 and the sealing cover 31 both play a role of dustproof and waterproof, and are used to increase the service life of internal components.

[0028] In the embodiment of the present invention, the flotation liquid level sensor 1 is perpendicular to the liquid surface in the flotation cell. The inclination sensor 13 is used to monitor the perpendicularity of the flotation liquid level sensor 1 or the levelness of the base 11. Since the three sets of screwing rods 12 and the three sets of threaded tubes 212 are fixed from different coordinate positions in the same plane with the flotation liquid level sensor 1 as the axis, when any one or two sets among the three sets of screwing rods 12 and the three sets of threaded tubes 212 become loose (the so-called looseness means that there is an axial displacement between the screwing rod 12 and the threaded tube 212), the inclination sensor 13 will accurately capture the inclination angle of the base 11 in the direction of one or two sets of screwing rods 12. Conversely, the displacement amount or vector data of any one or two sets of screwing rods 12 can be obtained through the inclination angle parameters monitored by the inclination sensor 13. The driving gear 211 is driven by a driving motor. The inclination sensor 13, the switch unit, and the power module are all communicatively connected to the feedback control system. Combining with the output signal of the flotation liquid level sensor 1 and using a feedback control system (such as a PID controller), the perpendicularity of the flotation liquid level sensor 1 can be monitored in real time and corrected as needed to ensure that the flotation liquid level sensor 1 continuously maintains the best measurement state. Since the feedback control system is widely used in the prior art, it will not be elaborated here; Considering the convenience of maintaining the flotation liquid level sensor 1, the automatic adjustment module 2 in this application can also control the simultaneous movement of the three sets of threaded rods by controlling the simultaneous rotation of the three sets of threaded tubes 212, so as to be able to automatically disassemble the three sets of threaded rods from the three sets of threaded tubes 212.

[0029] Please refer to Figure 1 、 Figure 6 and Figure 7 , in an embodiment of the present invention, it further includes a steady flow shield 4. The steady flow shield 4 is fixedly connected to the mounting frame 3. The surface of the steady flow shield 4 is provided with a diversion opening 41. The inside of the steady flow shield 4 is fixedly connected with a U-shaped steady flow frame 42. The U-shaped steady flow frame 42 is distributed between the diversion opening 41 and the electrode ring of the flotation liquid level sensor 1. The outer contour of the diversion opening 41 is not limited, and the area of the diversion opening 41 should be no less than 5 square centimeters. On the one hand, it is to prevent impurities inside the liquid from blocking the diversion opening 41, and on the other hand, it is to avoid excessive concentration of foam inside the ore liquid in the steady flow shield 4, resulting in errors in liquid level measurement.

[0030] In the embodiment of the present invention, the material of the flow-stabilizing shield 4 is hard rubber. When the rapidly flowing ore liquid enters the diversion port 41, the impact force of the water flow directly acts on the surface of the U-shaped flow-stabilizing frame 42 facing the diversion port 41. Since the U-shaped flow-stabilizing frame 42 is designed with openings on both axial sides along the flotation liquid level sensor 1, the water flow blocked by the U-shaped flow-stabilizing frame 42 will flow along both axial sides of the flotation liquid level sensor 1. Or rather, the impact force of the water flow will be transmitted along both axial sides of the flotation liquid level sensor 1, thereby greatly weakening the impact force of the water flow on the electrode ring, ensuring the stability of the liquid level inside the flow-stabilizing shield 4, and improving the accuracy of the flotation liquid level sensor 1.

[0031] Please refer to Figure 6 and Figure 7 In an embodiment of the present invention, an automatic cleaning module 5 is further included. The automatic cleaning module 5 includes an annular pipe 51, a cleaning valve 52, a suspension bracket 53, a winding part 54 and a suspension rope 55. The cleaning valve 52 and the suspension bracket 53 are both fixedly connected to the annular pipe 51. The winding part 54 is connected to the mounting bracket 3. One end of the suspension rope 55 is wound around the winding part 54, and the other end of the suspension rope 55 is fixed to the suspension bracket 53. The suspension bracket 53 is in sliding contact with the U-shaped flow-stabilizing frame 42. A pipe joint 56 is fixedly connected to the surface of the annular pipe 51. The winding part 54 is composed of a winding roller shaft and a driving motor. The specific connection structure will not be elaborated here. Of course, the user can also design the specific structure of the winding part 54 according to their own needs, as long as the annular pipe 51 can be lifted and lowered by winding the suspension rope 55.

[0032] In the embodiment of the present invention, in the initial state, the winding part 54 suspends the annular pipe 51 to a position close to the base 11 through the suspension rope 55 to keep the annular pipe 51 out of the liquid surface. When cleaning is required, the winding part 54 slowly descends through the suspension rope 55. Driven by an external liquid pump, the cleaning agent is conveyed into the annular pipe 51 through a flexible water pipe and the pipe joint 56, and finally sprayed from the cleaning valve 52 onto the flotation liquid level sensor 1 to clean the foreign matters (suspended solid mineral particles) attached near the electrode ring, preventing the foreign matters from changing the contact resistance of the electrode and affecting the measurement result of the sensor. It should be noted that the compatibility between the cleaning agent and the sensor material should be ensured, and cleaning agents that can corrode the sensor material should be avoided. With the design of the axially extending U-shaped flow-stabilizing frame 42, since the suspension bracket 53 moves along the U-shaped flow-stabilizing frame 42, it can prevent the cleaning valve 52 from bumping against the electrode ring due to shaking, thus ensuring the stability during cleaning.

[0033] Working principle: According to the tilt angle parameters monitored by the tilt sensor 13, the position and displacement of the loosened screw rod 12 are judged, and the switch unit corresponding to the screw rod 12 is controlled to close. Since the electromagnet 221 loses the magnetic attraction to the transmission gear 213 after the switch unit is closed, the elastic deformation of the spring 224 drives the transmission gear 213 to move to a position where it fits with the mounting bracket 3. At this time, the transmission gear 213 is in transmission connection with the driving gear 211, and the driving gear 211 and the transmission gear 213 are used to control the rotation of the threaded tube 212. The rotating threaded tube 212 controls the movement of the screw rod 12 by a threaded connection with the screw rod 12 for a corresponding distance until it stops when receiving the horizontal signal fed back by the tilt sensor 13. Since the threaded tube 212 is connected to the bearing预埋 in the surface of the mounting bracket 3, and the screw rod 12 is in threaded connection with the threaded tube 212, under the condition of ensuring a stable connection relationship between the screw rod 12, the three threaded tubes 212 and the surface of the mounting bracket 3, and in cooperation with the adjustment ability of the automatic adjustment module 2 for the displacement of any one screw rod 12, the automatic correction of the perpendicularity of the flotation liquid level sensor 1 can be ensured, thereby improving the measurement accuracy of the flotation liquid level sensor 1 for the liquid level of the ore liquid in the flotation cell.

[0034] In summary, this application is different from the traditional automatic adjustment bracket. It can ensure a stable connection relationship between the screw rod 12, the three threaded tubes 212 and the surface of the mounting bracket 3. In cooperation with the adjustment ability of the automatic adjustment module 2 for the displacement of any one screw rod 12, it can automatically correct the perpendicularity of the flotation liquid level sensor 1 from the position of each installation point, improving the measurement accuracy of the flotation liquid level sensor 1.

[0035] With the structural design of the C-shaped flow stabilizer 42 cooperating with the diversion port 41, when the fast-flowing liquid flows through the diversion port 41 towards the flotation liquid level sensor 1, the impact force of the water flow will be transmitted along both axial sides of the flotation liquid level sensor 1 by the C-shaped flow stabilizer 42, thereby greatly weakening the impact force of the water flow on the electrode ring, ensuring the stability of the liquid level inside the flow stabilizer cover 4, and improving the accuracy of the flotation liquid level sensor 1.

[0036] For those skilled in the art, although several embodiments and examples of the present invention are described, these embodiments and examples are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the gist of the invention.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A liquid level measuring device for use in a flotation tank, comprising a flotation liquid level sensor (1) and a mounting frame (3), wherein a screw rod (12) and a tilt sensor (13) are arranged at the end of the flotation liquid level sensor (1), characterized in that: It further includes: An automatic adjustment module (2), the automatic adjustment module (2) includes an adjustment part (21) and a control part (22), the adjustment part (21) includes a driving gear (211), a threaded tube (212) and a transmission gear (213), the transmission gear (213) is connected to the threaded tube (212), the screw rod (12) is threadedly connected inside the threaded tube (212), the transmission gear (213) is in transmission connection with the driving gear (211), and the threaded tube (212) is connected to the mounting bracket (3); The adjustment part (21) includes an electromagnet (221), and the three groups of electromagnets (221), the screw rod (12) and the threaded tube (212) are all symmetrically distributed about the axis of the flotation liquid level sensor (1).

2. A liquid level measuring device for use in a flotation tank according to claim 1, characterized in that: It further includes a flow stabilizer shield (4), the flow stabilizer shield (4) is fixedly connected to the mounting bracket (3), a flow guiding port (41) is arranged on the surface of the flow stabilizer shield (4), and a U-shaped flow stabilizer frame (42) is fixedly connected to the inner side of the flow stabilizer shield (4), and the U-shaped flow stabilizer frame (42) is distributed between the flow guiding port (41) and the electrode ring of the flotation liquid level sensor (1).

3. A liquid level measuring device for use in a flotation tank according to claim 2, characterized in that: It further includes an automatic cleaning module (5), the automatic cleaning module (5) includes an annular tube (51), a cleaning valve (52), a suspension bracket (53), a winding part (54) and a suspension rope (55), the cleaning valve (52) and the suspension bracket (53) are both fixedly connected to the annular tube (51), the winding part (54) is connected to the mounting bracket (3), one end of the suspension rope (55) is wound around the winding part (54), the other end of the suspension rope (55) is fixed to the suspension bracket (53), and the suspension bracket (53) is in sliding contact with the U-shaped flow stabilizer frame (42).

4. The liquid level measuring device used in a flotation tank according to claim 1, characterized in that: A base (11) is fixedly connected to the end of the flotation liquid level sensor (1), an inclination sensor (13) is embedded on the surface of the base (11), and the screw rod (12) is fixedly connected to the base (11).

5. The liquid level measuring device used in a flotation tank according to claim 1, characterized in that: Ribs (214) and rib grooves are respectively arranged on the surfaces of the threaded tube (212) and the transmission gear (213), and the ribs (214) are in sliding connection with the rib grooves.

6. A liquid level measuring device for use in a flotation tank according to claim 5, characterized in that: The control part (22) further includes a support ring (222), a conductive bar (223) and a spring (224), the support ring (222) is fixedly connected to the mounting bracket (3), one end of the conductive bar (223) is electrically connected to the electromagnet (221), the other end of the conductive bar (223) is connected to a power source, a switch unit is arranged between the conductive bar (223) and the electromagnet (221), the spring (224) is connected between the support ring (222) and the transmission gear (213), and the transmission gear (213) is made of metal.

7. The liquid level measuring device used in a flotation tank according to claim 4, characterized in that: Sealing rings (14) and sealing covers (31) are respectively fixedly connected to the surfaces of the base (11) and the mounting bracket (3).

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