Stirring self-suction flotation machine directly driven by variable frequency motor

Abstract

The utility model discloses a stirring self-suction flotation machine directly driven by a variable frequency motor, and belongs to the field of flotation machines. The flotation machine comprises a flotation machine body, wherein a flotation cavity is formed in the flotation machine body; the torque sensor is mounted on the flotation machine body; a main shaft of the variable frequency motor is connected with the torque sensor; the stirring assembly comprises a stirring main shaft, one end of the stirring main shaft is connected with the output shaft end of the torque sensor through a coupler, and the other end of the stirring main shaft is provided with an impeller; the control cabinet is arranged on the flotation machine body, and the control cabinet is in signal connection with the variable frequency motor and the torque sensor; and rotation axes of the variable frequency motor, the torque sensor and the stirring main shaft are coaxial. The stirring shaft is directly driven by the variable frequency motor to stir metal mineral slurry, and the problems that an original belt transmission stirring type flotation machine is large in energy consumption, low in transmission efficiency, non-adjustable in rotating speed, short in service life, high in maintenance cost and the like are solved.

Description

Technical Field

[0001] The utility model belongs to the field of flotation machines, in particular to a variable frequency motor directly driven stirring self-priming flotation machine. Background Art

[0002] At present, the vast majority of non-ferrous metal smelting enterprises still use traditional belt-driven agitator flotation machines for mineral flotation operations, that is, the power of the asynchronous motor is transmitted to the agitator main shaft through belt drive. The use of friction belt drive mode will inevitably lead to low transmission efficiency, and the wear of the transmission belt itself and surface fatigue cracking and peeling will further increase maintenance costs and reduce flotation operation efficiency.

[0003] At present, there have been many reports on the design patents of flotation machines, but there are still many problems in the structural design, working mode, installation, use and maintenance of these flotation machine transmission devices, such as:

[0004] Patent 1 (publication number CN 108940607 A) discloses a flotation machine transmission device, including a reduction box, an upper hollow shaft, a motor support frame, an auxiliary oil tank and a lubricating oil circulation pump, wherein the input shaft of the reduction box is connected to the motor shaft through a high-speed end coupling and is parallel to the upper hollow shaft. As can be seen from the patent overview and drawings, the device connects the motor and the upper hollow shaft through a reducer and a coupling, thereby transmitting the power of the motor to the agitator. However, since the motor and the hollow shaft of the device are placed parallel, the transmission efficiency may be reduced; on the other hand, since the overall structure of the device is relatively complex and cumbersome, the installation and daily maintenance costs of the entire device are high, and the overall economic benefits are low.

[0005] Patent 2 (publication number CN 203548745 U) discloses a sprocket transmission device of a flotation machine scraping mechanism, including a transmission shaft, a bearing seat group, and a sprocket device, wherein the sprocket device is connected to the power device to provide power for the transmission shaft, and the sprocket device synchronously drives the two adjacent shafts to rotate. From the overview and drawings of the patent, it can be seen that the device described in the patent only relies on the sprocket device to transmit the power of the motor to the working part of the flotation machine, but because the chain and sprocket in the sprocket device will wear during the operation, the service life is short, and the parts in the device need to be replaced frequently, resulting in a large amount of unnecessary financial losses; on the other hand, the daily maintenance cost of the device is high and there is no design for safety protection settings for the transmission device. Once a problem occurs in a certain link, the entire power transmission process will fail. Utility Model Content

[0006] The utility model aims to overcome the deficiencies of the prior art and provide a variable frequency motor directly driven stirring self-priming flotation machine.

[0007] The purpose of the utility model is achieved through the following technical solutions: a variable frequency motor directly driven stirring self-priming flotation machine, comprising:

[0008] A flotation machine body, wherein a flotation chamber is provided in the flotation machine body;

[0009] A torque sensor, wherein the torque sensor is mounted on the flotation machine body;

[0010] A variable frequency motor, the main shaft of which is connected to the torque sensor;

[0011] A stirring assembly, wherein the stirring assembly comprises a stirring main shaft, one end of the stirring main shaft is connected to the output shaft end of the torque sensor via a coupling, and the other end of the stirring main shaft is equipped with an impeller, and the impeller is located in the flotation chamber;

[0012] A control cabinet, which is arranged on the flotation machine body and is respectively connected to the variable frequency motor and the torque sensor signal;

[0013] The frequency conversion motor, the torque sensor and the rotation axis of the stirring main shaft are coaxial.

[0014] Furthermore, the flotation machine body comprises:

[0015] A flotation box, wherein a flotation cavity is provided in the flotation box;

[0016] a first bracket, the first bracket being mounted on the flotation box;

[0017] Wherein, the torque sensor is installed on the first bracket.

[0018] Furthermore, the flotation material box is a box body with an open top, and a flotation tank is provided on the flotation material box. The flotation machine body also includes:

[0019] A rotating shaft, the rotating shaft being arranged at the opening of the flotation box;

[0020] A foam scraper, wherein the foam scraper is arranged on the rotating shaft;

[0021] A scraper motor, wherein the scraper motor is mounted on the flotation material box, the main shaft of the scraper motor is connected to one end of the rotating shaft, and the scraper motor is connected to the control cabinet signal;

[0022] The foam scraper is used to scrape the metal mineralization foam generated in the flotation chamber during the flotation process into the flotation tank.

[0023] Furthermore, the outer surface of the foam scraper is provided with an anti-corrosion coating.

[0024] Furthermore, the first bracket comprises:

[0025] A base bracket, the base bracket is installed on the flotation material box;

[0026] A motor support frame, the motor support frame is installed on the base support, and the motor support frame is a trapezoidal support structure;

[0027] A support plate, the support plate is mounted on the top of the motor support frame;

[0028] Wherein, the torque sensor is installed on the support plate, and the stirring assembly is connected to the base bracket.

[0029] Furthermore, the support plate is provided with eye bolts.

[0030] Furthermore, the stirring assembly further comprises:

[0031] A stirring shaft base, wherein the stirring shaft base is installed on the flotation machine body;

[0032] A mixing drum connected to the mixing shaft base;

[0033] The stirring main shaft passes through the stirring drum, and there is a gap between the outer surface of the stirring main shaft and the inner wall of the stirring drum.

[0034] Furthermore, the stirring assembly further comprises:

[0035] A self-priming pipe, one end of which is located outside the flotation machine body, and the other end of which is communicated with the gap between the mixing drum and the mixing main shaft.

[0036] Furthermore, the self-priming tube is an L-shaped structure.

[0037] Furthermore, the coupling is an elastic pin coupling.

[0038] The beneficial effects of the utility model are:

[0039] (1) The utility model directly drives the stirring shaft to stir the metal ore slurry through a variable frequency motor, thereby solving the problems of the original belt-driven stirring flotation machine, such as high energy consumption, low transmission efficiency, non-adjustable speed, short life, and high maintenance cost;

[0040] (2) The utility model directly drives the foam scraper to rotate through the scraper motor, and uses a control cabinet to adjust the speed of the scraper motor, thereby solving the problems of low efficiency and unadjustable speed of the existing foam scraper driven by belts;

[0041] (3) The utility model monitors the torque borne by the stirring main shaft in real time through the torque sensor, and adjusts the speed of the variable frequency motor through the control cabinet, thereby realizing the automatic control of the stirring process of the flotation machine, extending the life of the variable frequency motor, and further saving energy consumption;

[0042] (4) The utility model improves the working stability of the variable frequency motor and the overall mechanical balance of the flotation machine through the structural design of the support plate, motor support frame, etc., and solves the problems of structural force imbalance caused by the original motor support frame and the motor being arranged outside the flotation box;

[0043] (5) The utility model improves the convenience of installation and maintenance of the main components of the flotation machine through the design of lifting rings and studs, and solves the problem of inconvenient lifting of the commonly used flotation machine components;

[0044] (6) The utility model adopts an L-shaped self-priming pipe, which uses the negative pressure generated by the stirring shaft during the stirring process to achieve self-priming of external air, solving the problem of some existing stirring flotation machines introducing air by setting up an air pump conveying device. The overall structure is simple and the cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a structural schematic diagram of a stirring self-priming flotation machine directly driven by a variable frequency motor in the utility model;

[0046] Figure 2 A cross-sectional schematic diagram of a stirring self-priming flotation machine directly driven by a variable frequency motor in the utility model;

[0047] Figure 3 A schematic diagram of the position of the control cabinet in the utility model;

[0048] In the figure, 1 is a variable frequency motor, 2 is a torque sensor, 3 is a support plate, 4 is a connecting flange, 5 is an eye bolt, 6 is a motor support frame, 7 is a base bracket, 8 is a flotation box, 9 is a scraper motor, 10 is a flotation tank, 11 is a rotating shaft, 12 is a foam scraper, 13 is a self-priming pipe, 14 is a stirring shaft base, 15 is a coupling, 16 is a stirring main shaft, 17 is a stirring drum, 18 is an impeller, and 19 is a control cabinet. DETAILED DESCRIPTION

[0049] The following will be combined with the embodiments to clearly and completely describe the technical solution 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 those skilled in the art without creative work are within the scope of protection of the utility model.

[0050] See also Figures 1 to 3This embodiment provides a variable frequency motor directly driven stirring self-priming flotation machine:

[0051] A variable frequency motor 1 directly drives a stirring self-priming flotation machine, comprising a flotation machine body, a torque sensor 2, a variable frequency motor 1, a stirring assembly, a coupling 15, an impeller 18 and a control cabinet 19, wherein the stirring assembly comprises a stirring main shaft 16.

[0052] like Figure 1 and Figure 3 As shown, a flotation chamber is provided inside the flotation machine body, a torque sensor 2 and a control cabinet 19 are installed on the flotation machine body, and the main shaft of the variable frequency motor 1 is connected to the torque sensor 2. Figure 2 As shown, one end of the stirring main shaft 16 is connected to the output shaft end of the torque sensor 2 through the coupling 15, and the other end of the stirring main shaft 16 is equipped with an impeller 18. The end of the stirring main shaft 16 equipped with the impeller 18 is located in the flotation chamber, for example, Figure 1 An impeller 18 is installed at the bottom end of the stirring main shaft 16, and the impeller 18 stirs the mineral slurry under the drive of the stirring main shaft 16. The control cabinet 19 is respectively connected to the frequency conversion motor 1 and the torque sensor 2, wherein the rotation axis of the frequency conversion motor 1, the torque sensor 2 and the stirring main shaft 16 are coaxial.

[0053] When the main shaft of the variable frequency motor 1 rotates, the stirring main shaft 16 is driven to rotate, and the mineral slurry in the flotation chamber is stirred. The torque sensor 2 dynamically monitors the torque of the stirring main shaft 16 when stirring the mineral slurry in real time, and feeds back the measured torque value to the control cabinet 19. The control cabinet 19 adjusts the speed of the variable frequency motor 1 according to the torque value. For example, when the torque is greater than the set first threshold, the control cabinet 19 sends a signal to the inverter of the variable frequency motor 1 to reduce the speed of the variable frequency motor 1. When the torque is less than the set second threshold, the control cabinet 19 sends a signal to the inverter of the variable frequency motor 1 to increase the speed of the variable frequency motor 1, so that the variable frequency motor 1 recovers and maintains the normal speed.

[0054] The flotation machine in this embodiment directly drives the stirring spindle 16 to stir the metal ore slurry through the variable frequency motor 1, which solves the problems of large energy consumption, low transmission efficiency, non-adjustable speed, short life, high maintenance cost, etc. of the existing belt-driven flotation machine; at the same time, the flotation machine in this embodiment monitors the torque borne by the stirring spindle 16 in real time through the torque sensor 2, and adjusts the speed of the variable frequency motor 1 through the control cabinet 19, thereby realizing the automatic control of the stirring process of the flotation machine, extending the life of the variable frequency motor 1, further reducing the energy consumption of the flotation operation, avoiding the overload start of the variable frequency motor 1, and can also judge and adjust the concentration of the ore slurry accordingly.

[0055] In some embodiments, the flotation machine body includes a flotation box 8 and a first bracket, the first bracket is mounted on the flotation box 8, and the torque sensor 2 and the control cabinet 19 are mounted on the flotation box 8.

[0056] Specifically, the flotation box 8 is a box with an open top. The first bracket includes a base bracket 7, a motor support bracket 6 and a support plate 3. The base bracket 7 is installed on the flotation box 8, the motor support bracket 6 is installed on the base bracket 7, the support plate 3 is installed on the top of the motor support bracket 6, the torque sensor 2 is installed on the support plate 3, and the stirring assembly is connected to the base bracket 7.

[0057] like Figure 1 As shown, the base support 7 includes two support bars, both ends of which are mounted on two opposite sides of the top opening of the flotation box 8. The support bars can be fixed to the flotation box 8 by welding, and the base support 7 is made of stainless steel angle steel.

[0058] The material of the motor support frame 6 is gray cast iron, and the bottom end of the motor support frame 6 is fixed to the support bar by bolt connection; the motor support frame 6 is a trapezoidal support structure. Due to the use of the trapezoidal support structure, the motor support frame 6 can more stably support the torque sensor 2, the variable frequency motor 1, etc.

[0059] The support plate 3 is installed on the top of the motor support frame 6 by means of bolt connection, and the torque sensor 2 is installed on the support plate 3 by means of the connecting flange 4 .

[0060] In this embodiment, the structural design of the base bracket 7, the motor support frame 6 and the support plate 3 improves the stability of the variable frequency motor 1 during operation and the overall mechanical balance of the flotation machine, and solves the problems of structural force imbalance caused by the original motor support frame 6 and the motor being arranged outside the flotation box.

[0061] The support plate 3 is provided with eyebolts 5, which improves the convenience of installation and maintenance of the main components of the flotation machine and solves the problem that the components of the flotation machine commonly used are inconvenient to lift.

[0062] Furthermore, if Figure 1As shown, the flotation machine body also includes a scraper motor 9, a rotating shaft 11 and a foam scraper 12. The flotation tank 8 is provided with a flotation trough 10, and the rotating shaft 11 is provided with a foam scraper 12, for example, the foam scraper 12 is welded and arranged on the rotating shaft 11. The two opposite sides of the flotation tank 8 are provided with a rotating shaft hole, and the two ends of the rotating shaft 11 are respectively installed in the rotating shaft holes on the two sides, and the aperture of the rotating shaft hole is larger than the diameter of the rotating shaft 11, so as to ensure that the rotating shaft 11 can rotate in the rotating shaft hole. The scraper motor 9 is installed on the outer surface of the flotation tank 8, and the scraper motor 9 is connected to the control cabinet 19 by signal. The main shaft of the scraper motor 9 is connected to one end of the rotating shaft 11. When the main shaft of the scraper motor 9 rotates, the foam scraper 12 is driven to rotate, so as to scrape the metal mineralization foam generated in the flotation chamber during the flotation process into the flotation tank 10.

[0063] In this embodiment, the foam scraper 12 is directly driven to rotate by the scraper motor 9, and the control cabinet 19 is used to adjust the speed of the scraper motor 9, thereby solving the problems of low efficiency and unadjustable speed of the existing foam scraper 12 through belt transmission.

[0064] In order to improve the service life of the foam scraper 12 , an anti-corrosion coating may be provided on the outer surface of the foam scraper 12 .

[0065] In some embodiments, Figure 2 As shown, the stirring assembly further includes a stirring shaft base 14 and a stirring drum 17. The stirring drum 17 has a through hole connecting both ends thereof, and the stirring main shaft 16 passes through the stirring drum 17 through the through hole. There is a gap between the outer surface of the stirring main shaft 16 and the inner wall of the stirring drum 17 to allow air to enter. The stirring shaft base 14 is mounted on the flotation machine body, and the stirring drum 17 is connected to the stirring shaft base 14.

[0066] like Figure 1 As shown, the stirring shaft base 14 is a flat plate structure, and the stirring shaft base 14 is fixed to the support bar of the base bracket 7 by bolts, and the stirring drum 17 is fixedly connected to the stirring shaft base 14 by bolts.

[0067] In some embodiments, Figure 2 As shown, the stirring assembly further includes a self-priming pipe 13, one end of which is located outside the flotation machine body, and the other end of which is connected to the gap between the stirring drum 17 and the stirring main shaft 16. The self-priming pipe 13 can be an L-shaped structure. During flotation stirring, the impeller 18 rotates and stirs in the mineral slurry to form a certain negative pressure, and the outside air can enter the gap between the stirring drum 17 and the stirring main shaft 16 through the self-priming pipe 13, and then enter the slurry to form mineralized foam with stirring.

[0068] The self-priming pipe 13 can be a PVC pipe with an inner diameter of 25 to 35 mm.

[0069] This embodiment adopts the structural design of the L-shaped self-priming pipe 13, and utilizes the negative pressure generated by the stirring main shaft 16 during the stirring process to realize the self-inhalation of external air, which solves the design of introducing air by setting an air pump conveying device in some existing stirring flotation machines. The overall structure is simple and the cost is lower. At the same time, compared with the design of some linear self-priming pipes 13, the L-shaped self-priming pipe 13 makes the self-priming stirring part of the flotation machine more compact, avoiding the ore slurry from mistakenly entering and clogging the self-priming pipe 13 during the stirring process.

[0070] In some embodiments, the coupling 15 is an elastic pin coupling 15, which can effectively avoid impact and vibration when the motor spindle is started and stopped.

[0071] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A variable frequency motor directly driven stirring self-priming flotation machine, characterized in that: include: A flotation machine body, wherein a flotation chamber is provided in the flotation machine body; A torque sensor, wherein the torque sensor is mounted on the flotation machine body; A variable frequency motor, the main shaft of which is connected to the torque sensor; A stirring assembly, wherein the stirring assembly comprises a stirring main shaft, one end of the stirring main shaft is connected to the output shaft end of the torque sensor via a coupling, and the other end of the stirring main shaft is equipped with an impeller, and the impeller is located in the flotation chamber; A control cabinet, which is arranged on the flotation machine body and is respectively connected to the variable frequency motor and the torque sensor signal; The frequency conversion motor, the torque sensor and the rotation axis of the stirring main shaft are coaxial.

2. A variable frequency motor directly driven stirring self-priming flotation machine according to claim 1, characterized in that: The flotation machine body comprises: A flotation box, wherein a flotation cavity is provided in the flotation box; a first bracket, the first bracket being mounted on the flotation box; Wherein, the torque sensor is installed on the first bracket.

3. A variable frequency motor directly driven stirring self-priming flotation machine according to claim 2, characterized in that: The flotation material box is a box body with an open top, and a flotation tank is provided on the flotation material box. The flotation machine body also includes: A rotating shaft, the rotating shaft being arranged at the opening of the flotation box; A foam scraper, wherein the foam scraper is arranged on the rotating shaft; A scraper motor, wherein the scraper motor is mounted on the flotation material box, the main shaft of the scraper motor is connected to one end of the rotating shaft, and the scraper motor is connected to the control cabinet signal; The foam scraper is used to scrape the metal mineralization foam generated in the flotation chamber during the flotation process into the flotation tank.

4. A variable frequency motor directly driven stirring self-priming flotation machine according to claim 3, characterized in that: The outer surface of the foam scraper is provided with an anti-corrosion coating.

5. The variable frequency motor directly driven stirring self-priming flotation machine according to claim 2, characterized in that: The first bracket comprises: A base bracket, the base bracket is installed on the flotation material box; A motor support frame, the motor support frame is installed on the base support, and the motor support frame is a trapezoidal support structure; A support plate, the support plate is mounted on the top of the motor support frame; Wherein, the torque sensor is installed on the support plate, and the stirring assembly is connected to the base bracket.

6. A variable frequency motor directly driven stirring self-priming flotation machine according to claim 5, characterized in that: The support plate is provided with eye bolts.

7. The variable frequency motor directly driven stirring self-priming flotation machine according to claim 1, characterized in that: The stirring assembly also includes: A stirring shaft base, wherein the stirring shaft base is installed on the flotation machine body; A mixing drum connected to the mixing shaft base; The stirring main shaft passes through the stirring drum, and there is a gap between the outer surface of the stirring main shaft and the inner wall of the stirring drum.

8. The variable frequency motor directly driven stirring self-priming flotation machine according to claim 7, characterized in that: The stirring assembly also includes: A self-priming pipe, one end of which is located outside the flotation machine body, and the other end of which is communicated with the gap between the mixing drum and the mixing main shaft.

9. A variable frequency motor directly driven stirring self-priming flotation machine according to claim 8, characterized in that: The self-priming tube is an L-shaped structure.

10. The variable frequency motor directly driven stirring self-priming flotation machine according to claim 1, characterized in that: The coupling is an elastic pin coupling.

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