Coal preparation plant heavy medium system medium adding device and coal preparation plant heavy medium system

Abstract

This utility model provides a medium-adding device and a heavy medium system for a coal preparation plant. The medium-adding device includes: a mixing tank with a receiving cavity inside, connected to a water inlet pipe, a feed pipe, and a conveying pipe; a motor fixedly connected to the mixing tank; a drive shaft disposed in the receiving cavity and fixedly connected to the output shaft of the motor; a connecting ring sleeved on the drive shaft and movable along the extension direction of the drive shaft; multiple first stirring blades fixedly connected circumferentially at intervals to the outer wall of the connecting ring; multiple second stirring blades fixedly connected circumferentially at intervals to the end of the drive shaft near the conveying pipe; a fixing ring, the inner wall of which is fixedly connected to the end of each first stirring blade away from the drive shaft; and a lifting assembly driven by the fixing ring for driving the fixing ring to rise and fall. Using this utility model, the mixture at different heights within the mixing tank can be stirred, improving the stirring efficiency of the device and thus enhancing the overall production efficiency of the heavy medium system.

Description

Technical Field

[0001] This utility model relates to the field of medium addition technology in coal preparation plants, specifically to a medium addition device and a heavy medium system in a coal preparation plant. Background Technology

[0002] In the heavy media system of a coal preparation plant, the medium addition device is a key piece of equipment used to prepare and transport heavy media suspension. The medium addition device mixes and stirs the medium and water in a mixing tank to form a uniform suspension, which is then pumped to the subsequent sorting equipment.

[0003] In the prior art, when mixing a suspension, the stirring blades inside the mixing tank can only perform stirring operations at a fixed point with a constant height. This results in the suspension, after stratification, often requiring more time to fully mix, reducing the stirring efficiency of the device and consequently affecting the overall production efficiency of the heavy media system. Utility Model Content

[0004] In view of this, the present invention provides a medium-adding device for a heavy medium system in a coal preparation plant and a heavy medium system in a coal preparation plant to solve the above-mentioned technical problems.

[0005] The medium-adding device for a heavy medium system in a coal preparation plant provided by this utility model includes:

[0006] A mixing tank, wherein a receiving cavity is provided inside the mixing tank, and the mixing tank is connected to a water inlet pipe, a feed pipe and a conveying pipe;

[0007] An electric motor, which is fixedly connected to the mixing tank;

[0008] A drive shaft is disposed within the receiving cavity and is fixedly connected to the output shaft of the motor;

[0009] A connecting ring, which is sleeved on the drive shaft and can move along the extension direction of the drive shaft;

[0010] Multiple first stirring blades are fixedly connected to the outer wall of the connecting ring at circumferential intervals.

[0011] Multiple second stirring blades are fixedly connected to the drive shaft at circumferential intervals near one end of the feed pipe;

[0012] A retaining ring, the inner wall of which is fixedly connected to the end of each of the first stirring blades away from the drive shaft;

[0013] A lifting assembly is connected to the fixed ring drive and is used to drive the fixed ring to lift.

[0014] Optionally, the lifting assembly includes:

[0015] Mounting plate, which is fixedly connected to the outer wall of the mixing tank;

[0016] The telescopic component has its fixed end fixedly connected to the mounting plate.

[0017] A connecting plate, which is fixedly connected to the movable end of the telescopic component;

[0018] Multiple lifting rods are provided, with the first end of each lifting rod fixedly connected to the connecting plate, and the second end of each lifting rod penetrating the mixing tank and slidably connected to the fixing ring.

[0019] Optionally, a limiting ring groove is provided circumferentially on the side of the fixing ring facing the lifting rod;

[0020] The second end of each of the lifting rods is inserted into the limiting ring groove and can slide along the limiting ring groove.

[0021] Optionally, the heavy medium feeding device of the coal preparation plant further includes: multiple diversion blades, wherein the multiple diversion blades are circumferentially and fixedly connected to the fixed ring.

[0022] Optionally, the coal preparation plant heavy medium system adding device further includes: a support frame, which is fixedly connected to the inner wall of the mixing tank and rotatably connected to the end of the drive shaft away from the motor.

[0023] Optionally, the support frame includes:

[0024] Multiple support rods, the first ends of which are fixedly connected to the inner wall of the mixing tank at intervals;

[0025] A fixed column is fixedly connected to the second end of each of the support rods;

[0026] A protruding rod is fixedly connected to the end of the fixed column away from the support rod, and a groove is formed on the surface of the protruding rod away from the fixed column;

[0027] A connecting ball is fixed to one end of the drive shaft facing the protruding rod, and the other end of the connecting ball away from the drive shaft is embedded in the groove and can rotate within the groove.

[0028] Optionally, the heavy media feeding device of the coal preparation plant further includes:

[0029] A first bevel gear, on which the connecting ball is fitted and fixedly connected;

[0030] A longitudinal stirring device, comprising:

[0031] A rotating shaft, the two opposite ends of which are rotatably connected to the fixed column and the inner wall of the mixing tank, respectively;

[0032] The second bevel gear is sleeved on the rotating shaft and fixedly connected to the rotating shaft. The second bevel gear meshes with the first bevel gear.

[0033] Multiple third stirring blades are circumferentially fixedly connected to the rotating shaft.

[0034] Optionally, the coal preparation plant heavy medium system adding device further includes: multiple support legs, which are fixedly connected to the outer wall of the mixing tank at circumferential intervals.

[0035] Optionally, the mixing tank includes a detachably connected tank body and a lid, the tank body and the lid enclosing the receiving cavity.

[0036] This utility model also provides a heavy medium system for a coal preparation plant, including a heavy medium separator and a medium feeding device for the heavy medium system as described in any of the above-mentioned embodiments, wherein the conveying pipe of the medium feeding device for the heavy medium system is connected to the feed inlet of the heavy medium separator.

[0037] The technical solution provided by this utility model has at least the following beneficial effects compared with the prior art:

[0038] The present invention relates to a coal preparation plant heavy media system adding device and a coal preparation plant heavy media system. By using the first and second stirring blades, the mixture at two height positions in the mixing tank is stirred simultaneously. At the same time, the lifting component drives the fixed ring and the first stirring blade to rise and fall, which can realize the stirring of the mixture at different height positions in the mixing tank. This allows the mixture in the mixing tank to be fully mixed in a short time, improving the stirring efficiency of the device and thus helping to improve the overall production efficiency of the heavy media system. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of a medium-adding device for a heavy medium system in a coal preparation plant according to an embodiment of the present invention;

[0040] Figure 2 for Figure 1 A schematic diagram showing the connection relationship between the drive shaft of the medium addition device and the first and second stirring blades.

[0041] Figure 3 for Figure 1 A schematic diagram of the lifting assembly of the medium-addition device shown;

[0042] Figure 4 for Figure 1 A schematic diagram of the support frame for the medium-addition device shown;

[0043] Figure 5 for Figure 1 A schematic diagram of the longitudinal stirring device of the medium addition device shown.

[0044] Figure label:

[0045] 1: Mixing tank; 101: Tank body; 102: Cover; 2: Motor; 3: Drive shaft; 4: First mixing blade; 5: Second mixing blade; 6: Fixing ring; 61: Limiting ring groove; 7: Lifting assembly; 71: Mounting plate; 72: Telescopic component; 73: Connecting plate; 74: Lifting rod; 8: Water inlet pipe; 9: Feed pipe; 10: Conveying pipe; 11: Diverting blade; 12: Support frame; 121: Support rod; 122: Fixing column; 123: Protruding rod; 124: Rotating groove; 13: Connecting ball; 14: First bevel gear; 15: Longitudinal mixing device; 151: Rotating shaft; 152: Second bevel gear; 153: Third mixing blade; 16: Support leg; 17: Connecting ring. Detailed Implementation

[0046] The embodiments of this utility model will be further described below with reference to the accompanying drawings. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description of this utility model. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0047] Figure 1 This is a schematic diagram of a medium-adding device for a heavy medium system in a coal preparation plant according to an embodiment of the present invention; Figure 2 for Figure 1 The diagram shows the connection relationship between the drive shaft of the medium-adding device and the first and second stirring blades. Figure 1 and Figure 2As shown, the medium-addition device of the heavy medium system in a coal preparation plant includes a mixing tank 1, a motor 2, a drive shaft 3, a connecting ring 17, multiple first mixing blades 4, multiple second mixing blades 5, a fixing ring 6, and a lifting assembly 7. The mixing tank 1 has a receiving cavity and is connected to a water inlet pipe 8, a feed pipe 9, and a conveying pipe 10. The motor 2 is fixedly connected to the mixing tank 1. The drive shaft 3 is located inside the receiving cavity and is fixedly connected to the output shaft of the motor 2. The connecting ring 17 is fitted onto the drive shaft 3 and can move along the extension direction of the drive shaft 3. The multiple first mixing blades 4 are circumferentially fixedly connected to the outer wall of the connecting ring 17 at intervals. The multiple second mixing blades 5 are circumferentially fixedly connected to the end of the drive shaft 3 near the conveying pipe 10 at intervals. The inner wall of the fixing ring 6 is fixedly connected to the end of each first mixing blade 4 away from the drive shaft 3. The lifting assembly 7 is driven by the fixing ring 6 and is used to drive the fixing ring 6 to rise and fall.

[0048] In use, the conveying pipe 10 is connected to the feed inlet of the downstream sorting equipment, the medium is fed into the mixing tank 1 through the feed pipe 9, and clean water is fed into the mixing tank 1 through the water inlet pipe 8. The motor 2 is started, and the output shaft of the motor 2 rotates, which drives the transmission shaft 3 connected to it to rotate. The rotation of the transmission shaft 3 drives the connecting ring 17 sleeved on it to rotate, which in turn drives the first stirring blade 4 and the fixed ring 6 directly or indirectly connected to the connecting ring 17 to rotate. At the same time, the transmission shaft 3 also drives the second stirring blade 5, which is located at a different height position from the first stirring blade 4, to rotate synchronously. Thus, the first stirring blade 4 and the second stirring blade 5 stir the mixture at different height positions in the mixing tank 1. After stirring for a certain period of time, the lifting assembly 7 is activated, causing it to drive the fixed ring 6 connected to it, as well as the first stirring blade 4 and connecting ring 17 directly or indirectly connected to the fixed ring 6, to rise or fall along the extension direction of the drive shaft 3. The lifting assembly 7 can drive the fixed ring 6 to rise and fall without affecting its rotation. After the lifting assembly 7 drives the fixed ring 6 to rise or fall to a new height, it stops and continues to stir the mixture at that height. By driving the fixed ring 6 to rise and fall, the mixture at different heights in the mixing tank 1 can be thoroughly stirred. After the mixture is stirred evenly, the valve on the delivery pipe 10 is opened to transport the evenly mixed suspension to the downstream sorting equipment.

[0049] The heavy media adding device of this utility model for coal preparation plant uses the first stirring blade 4 and the second stirring blade 5 to stir the mixture at two height positions in the mixing tank 1. At the same time, the lifting component 7 drives the fixed ring 6 and the first stirring blade 4 to rise and fall, which can realize the stirring of the mixture at different height positions in the mixing tank 1. This allows the mixture in the mixing tank 1 to be fully mixed in a short time, improves the stirring efficiency of the device, and thus helps to improve the overall production efficiency of the heavy media system.

[0050] like Figure 1As shown, in this embodiment, the upper part of the mixing tank 1 is a hollow cylindrical structure, and the lower part is a hollow funnel structure. The top end is connected to a water inlet pipe 8 and a feed pipe 9, and the lower end is connected to a conveying pipe 10. The motor 2 is fixed to the top outer wall of the mixing tank 1. The output shaft of the motor 2 passes through the mixing tank 1. The transmission shaft 3 is a hexagonal prism, vertically arranged, with its upper end fixedly connected to the output shaft of the motor 2, and its lower end extending to the bottom of the cylindrical structure of the mixing tank 1, maintaining a certain distance from the conveying pipe 10. Figure 2 As shown, the connecting ring 17 is fitted onto the drive shaft 3, allowing it to rotate synchronously with the drive shaft 3 and move along its extension direction. Three first stirring blades 4 are evenly distributed at equal intervals along the circumference of the connecting ring 17. The end of the first stirring blade 4 furthest from the drive shaft 3 is fixedly connected to the inner wall of the fixed ring 6, which is annular. Two second stirring blades 5 are symmetrically arranged about the drive shaft 3, fixedly connected to the drive shaft 3, and positioned near the lower end of the drive shaft 3. Figure 1 As shown, the outer circumferential wall of the fixed ring 6 is circumferentially fitted with the inner circumferential wall of the mixing tank 1. This allows it to move up and down under the drive of the lifting assembly 7 without interfering with the inner wall of the mixing tank 1, while also maximizing the extension length of the first stirring blade 4 for more thorough mixing of the mixture. Depending on the actual application, the specific shape and dimensions of the mixing tank 1 can be adjusted. Correspondingly, the dimensions of the fixed ring 6 and the drive shaft 3 can be adjusted, as can the specific number of the first stirring blade 4 and the second stirring blade 5. The specific connection position between the second stirring blade 5 and the drive shaft 3 can also be adjusted appropriately. The lifting assembly 7 can be of any structure, as long as it can drive the fixed ring 6 to move up and down without affecting its rotation.

[0051] Figure 3 for Figure 1 A schematic diagram of the lifting assembly of the medium-addition device is shown. Figure 3 As shown, optionally, the lifting assembly 7 includes a mounting plate 71, a telescopic member 72, a connecting plate 73, and a plurality of lifting rods 74. The mounting plate 71 is fixedly connected to the outer wall of the mixing tank 1; the fixed end of the telescopic member 72 is fixedly connected to the mounting plate 71; the connecting plate 73 is fixedly connected to the movable end of the telescopic member 72; the first end of each lifting rod 74 is fixedly connected to the connecting plate 73, and the second end of each lifting rod 74 passes through the mixing tank 1 and is slidably connected to the fixing ring 6.

[0052] like Figure 1 and Figure 3As shown, in this embodiment, the mounting plate 71 is fixed to the top outer wall of the mixing tank 1, the telescopic member 72 is vertically arranged, and the fixed end at the lower end is fixedly connected to the mounting plate 71. The connecting plate 73 is horizontally arranged and includes a first connecting section fixedly connected to the movable end at the upper end of the telescopic member 72, an arc-shaped section fixedly connected to the free end of the first connecting section, and a second connecting section extending from opposite ends of the arc-shaped section. The arc-shaped section can play a role in avoiding contact with the motor 2 during the lifting process, thus preventing mutual repulsion of movement. The lower surfaces of the two second connecting sections are respectively connected to a lifting rod 74. The lower end of each lifting rod 74 penetrates the upper side wall of the mixing tank 1 and is connected to the upper surface of the fixed ring 6. The lifting rod 74 can both drive the fixed ring 6 to lift and slide along the upper surface of the fixed ring 6 without affecting the rotation of the fixed ring 6 with the transmission shaft 3. Depending on the actual application, the specific fixing position of the mounting plate 71 and the mixing tank 1, the specific structural form of the connecting plate 73, and the specific number of lifting rods 74 can all be adjusted. The telescopic component 72 can be any length of adjustable telescopic structure, such as an electric telescopic rod, a hydraulic cylinder, or a pneumatic push rod.

[0053] Optionally, a limiting groove 61 is circumferentially formed on the side of the fixed ring 6 facing the lifting rod 74; the end of the second end of each lifting rod 74 is inserted into the limiting groove 61 and can slide along the limiting groove 61. This arrangement can limit the lifting rod 74 by means of the limiting groove 61 to prevent the lifting rod 74 from disengaging from the fixed ring 6, and also allows the end of the lifting rod 74 to slide in the limiting groove 61 during the rotation of the fixed ring 6 with the transmission shaft 3, without affecting the normal rotation of the fixed ring 6.

[0054] like Figure 2 As shown, in this embodiment, the upper surface of the fixing ring 6 is provided with an annular limiting groove 61 along the circumferential direction, such as... Figure 3 As shown, the shape of the lower end of each lifting rod 74 is designed to match the limiting ring groove 61, ensuring that after the lower end of the lifting rod 74 is inserted into the limiting ring groove 61, the lifting rod 74 can drive the fixed ring 6 to move up and down as a whole without dislocation, and without affecting the rotation of the fixed ring 6 itself.

[0055] Optionally, the heavy media feeding device in the coal preparation plant also includes multiple diversion blades 11, which are circumferentially and fixedly connected to the fixed ring 6. The diversion blades 11 can divert and stir the mixture in the mixing tank 1, making the mixture more uniformly mixed.

[0056] like Figure 1 and Figure 2As shown, in this embodiment, multiple diversion blades 11 are fixed at equal intervals around the lower surface of the fixed ring 6. The specific shape, size, number, and tilt angle of the diversion blades 11 connected to the fixed ring 6 can be adjusted appropriately according to specific stirring requirements.

[0057] Optionally, the medium-addition device of the heavy medium system in the coal preparation plant also includes a support frame 12, which is fixedly connected to the inner wall of the mixing tank 1 and rotatably connected to the end of the drive shaft 3 away from the motor 2. The support frame 12 provides rotatable support to the free end of the drive shaft 3, improving the stability of the drive shaft 3's rotation and thus enhancing the stability of the mixing process.

[0058] like Figure 1 As shown, in this embodiment, the support frame 12 is located near the bottom of the mixing tank 1. The lower end of the support frame 12 is fixedly connected to the inner wall of the mixing tank 1, and the upper end is rotatably connected to the bottom end of the transmission shaft 3. The support frame 12 provides axial support force to the transmission shaft 3 without affecting the rotation of the transmission shaft 3.

[0059] Figure 4 for Figure 1 A schematic diagram of the support frame for the substrate feeding device is shown below. Figure 1 and Figure 4 As shown, optionally, the support frame 12 includes multiple support rods 121, fixed columns 122, and protruding rods 123. The first ends of the multiple support rods 121 are fixedly connected to the inner wall of the mixing tank 1 at intervals; the fixed columns 122 are fixedly connected to the second end of each support rod 121; the protruding rods 123 are fixedly connected to the end of the fixed columns 122 away from the support rods 121, and a groove is formed on the surface of the protruding rods 123 away from the fixed columns 122; a connecting ball 13 is fixed to the end of the drive shaft 3 facing the protruding rod 123, and the end of the connecting ball 13 away from the drive shaft 3 is embedded in the groove and can rotate within the groove. This arrangement simplifies the structural composition of the support frame 12 and facilitates assembly and operation.

[0060] like Figure 1 and Figure 4 As shown, in this embodiment, four support rods 121 are provided, inclined towards each other. The lower end of each support rod 121 is fixedly connected to the circumferential inner wall of the mixing tank 1, and the upper end of each support rod 121 is fixedly connected to the lower surface of the fixing column 122. The fixing column 122 is a cylinder, and its upper surface is fixedly connected to the lower surface of the protruding rod 123. A groove is formed on the upper surface of the protruding rod 123. Figure 1 and Figure 2As shown, a connecting ball 13 is fixed at the lower end of the drive shaft 3. The lower part of the connecting ball 13 is inserted into the groove on the surface of the protrusion 123, and the part of the connecting ball 13 inserted into the groove matches the size of the groove, so that the connecting ball 13 can rotate in the groove and will not come out of the groove during the rotation. That is, a stable rotational connection between the drive shaft 3 and the support frame 12 is achieved.

[0061] Figure 5 for Figure 1 A schematic diagram of the longitudinal stirring device of the medium addition device is shown below. Figure 1 and Figure 5 As shown, optionally, the medium-adding device of the heavy medium system in the coal preparation plant also includes a first bevel gear 14 and a longitudinal stirring device 15. The first bevel gear 14 is fitted with a connecting ball 13 and is fixedly connected to the connecting ball 13. The longitudinal stirring device 15 includes a rotating shaft 151, a second bevel gear 152, and multiple third stirring blades 153. The two ends of the rotating shaft 151 are rotatably connected to the fixed column 122 and the inner wall of the mixing tank 1, respectively. The second bevel gear 152 is fitted with the rotating shaft 151 and is fixedly connected to the rotating shaft 151. The second bevel gear 152 meshes with the first bevel gear 14. The multiple third stirring blades 153 are circumferentially fixedly connected to the rotating shaft 151. With this arrangement, by means of the meshing of the first bevel gear 14 and the second bevel gear 152, the transmission shaft 3 drives the first stirring blade 4 and the second stirring blade 5 to perform horizontal stirring while simultaneously driving the longitudinal stirring device 15 to perform vertical stirring, thereby forming a bidirectional stirring effect and improving the overall stirring and mixing rate.

[0062] like Figure 4 As shown, in this embodiment, a rotating groove 124 is provided on the side wall of the fixed column 122, and a mounting groove can also be provided on the inner wall of the mixing tank 1 at the corresponding position. The two ends of the rotating shaft 151 are respectively inserted into the rotating groove 124 on the fixed column 122 and the mounting groove on the inner wall of the mixing tank 1, and a rotating connection with the fixed column 122 and the mixing tank 1 is achieved by means of bearings. Figure 1 and Figure 5As shown, two rotating shafts 151 are horizontally arranged perpendicular to the transmission shaft 3 and are symmetrically arranged about the fixed column 122. A second bevel gear 152 is fixedly fitted onto one end of each rotating shaft 151 near the fixed column 122, meshing with a first bevel gear 14 fixedly fitted onto the connecting ball 13. Multiple sets of third stirring blades 153 are fixed at intervals along the extension direction of each rotating shaft 151, each set including three stirring blades, evenly arranged circumferentially along the rotating shaft 151. When the motor 2 drives the transmission shaft 3 to rotate, the transmission shaft 3 drives the first stirring blade 4 and the second stirring blade 5 to rotate accordingly. Simultaneously, it drives the connecting ball 13 connected to it and the first bevel gear 14 fitted onto the connecting ball 13 to rotate synchronously. The rotation of the first bevel gear 14 drives the second bevel gear 152 meshing with it to rotate, which in turn drives the rotating shaft 151 connected to the second bevel gear 152 and the third stirring blades 153 on the rotating shaft 151 to rotate accordingly. In this embodiment, the drive shaft 3 extends to a position close to the bottom of the mixing tank 1, and the support frame 12 is also located close to the bottom of the mixing tank 1. Therefore, the longitudinal stirring device 15 performs vertical stirring near the bottom of the mixing tank 1, preventing the medium from settling and accumulating at the bottom.

[0063] Optionally, the heavy media feeding device in the coal preparation plant also includes multiple support legs 16, which are fixedly connected to the outer wall of the mixing tank 1 at circumferential intervals. The support legs 16 provide stable support for the mixing tank 1.

[0064] Optionally, the mixing tank 1 includes a detachably connected tank body 101 and a cover 102, which enclose a receiving cavity. The detachable connection of the tank body 101 and the cover 102 facilitates the maintenance or replacement of various structural components within the mixing tank 1.

[0065] like Figure 1 As shown, in this embodiment, the mixing tank 1 includes a lower tank body 101 and a top cover 102. The tank body 101 is composed of a hollow ring structure and a hollow funnel structure. The cover 102 seals the top of the tank body 101 and encloses an internal cavity.

[0066] This utility model also provides a heavy medium system for a coal preparation plant, including a heavy medium separator and a medium feeding device for the heavy medium system of the coal preparation plant as described in any of the above embodiments. The conveying pipe 10 of the medium feeding device for the heavy medium system of the coal preparation plant is connected to the feed inlet of the heavy medium separator.

[0067] The heavy media system for coal preparation plants of this invention uses the first stirring blade 4 and the second stirring blade 5 to simultaneously stir the mixture at two height positions in the mixing tank 1. At the same time, the lifting component 7 drives the fixed ring 6 and the first stirring blade 4 to rise and fall, which can realize the stirring of the mixture at different height positions in the mixing tank 1. This allows the mixture in the mixing tank 1 to be fully mixed in a short time, improving the stirring efficiency of the device and thus helping to improve the overall production efficiency of the heavy media system.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A medium feeding device for a dense medium system of a coal preparation plant, characterized in that, include: A mixing tank, wherein a receiving cavity is provided inside the mixing tank, and the mixing tank is connected to a water inlet pipe, a feed pipe and a conveying pipe; An electric motor, which is fixedly connected to the mixing tank; A drive shaft is disposed within the receiving cavity and is fixedly connected to the output shaft of the motor; A connecting ring, which is sleeved on the drive shaft and can move along the extension direction of the drive shaft; Multiple first stirring blades are fixedly connected to the outer wall of the connecting ring at circumferential intervals. Multiple second stirring blades are fixedly connected to the drive shaft at circumferential intervals near one end of the feed pipe; A retaining ring, the inner wall of which is fixedly connected to the end of each of the first stirring blades away from the drive shaft; A lifting assembly is connected to the fixed ring drive and is used to drive the fixed ring to lift.

2. The coal preparation plant dense medium system media addition device of claim 1, wherein, The lifting assembly includes: Mounting plate, which is fixedly connected to the outer wall of the mixing tank; The telescopic component has its fixed end fixedly connected to the mounting plate. A connecting plate, which is fixedly connected to the movable end of the telescopic component; Multiple lifting rods are provided, with the first end of each lifting rod fixedly connected to the connecting plate, and the second end of each lifting rod penetrating the mixing tank and slidably connected to the fixing ring.

3. The medium-adding device for the heavy medium system of a coal preparation plant according to claim 2, characterized in that: The fixing ring has a circumferential limiting ring groove on the side facing the lifting rod; The second end of each of the lifting rods is inserted into the limiting ring groove and can slide along the limiting ring groove.

4. The medium-adding device for a heavy medium system in a coal preparation plant according to any one of claims 1-3, characterized in that, Also includes: Multiple flow divider blades are fixedly connected to the fixed ring at circumferential intervals.

5. The medium-adding device for a heavy medium system in a coal preparation plant according to any one of claims 1-3, characterized in that, Also includes: A support frame is fixedly connected to the inner wall of the mixing tank and rotatably connected to the end of the drive shaft away from the motor.

6. The medium-adding device for a heavy medium system in a coal preparation plant according to claim 5, characterized in that, The support frame includes: Multiple support rods, the first ends of which are fixedly connected to the inner wall of the mixing tank at intervals; A fixed column is fixedly connected to the second end of each of the support rods; A protruding rod is fixedly connected to the end of the fixed column away from the support rod, and a groove is formed on the surface of the protruding rod away from the fixed column; A connecting ball is fixed to one end of the drive shaft facing the protruding rod, and the other end of the connecting ball away from the drive shaft is embedded in the groove and can rotate within the groove.

7. The medium-adding device for a heavy medium system in a coal preparation plant according to claim 6, characterized in that, Also includes: A first bevel gear is fitted with the connecting ball and is fixedly connected to the connecting ball; A longitudinal stirring device, comprising: A rotating shaft, the two opposite ends of which are rotatably connected to the fixed column and the inner wall of the mixing tank, respectively; The second bevel gear is sleeved on the rotating shaft and fixedly connected to the rotating shaft. The second bevel gear meshes with the first bevel gear. Multiple third stirring blades are circumferentially fixedly connected to the rotating shaft.

8. The medium-adding device for a heavy medium system in a coal preparation plant according to any one of claims 1-3, characterized in that, Also includes: Multiple support legs are fixedly connected to the outer wall of the mixing tank at circumferential intervals.

9. The medium-adding device for a heavy medium system in a coal preparation plant according to any one of claims 1-3, characterized in that: The mixing tank includes a detachably connected tank body and a lid, the tank body and the lid enclosing the receiving cavity.

10. A heavy medium system for a coal preparation plant, comprising a heavy medium separator, characterized in that, It also includes the medium feeding device for the heavy medium system of the coal preparation plant as described in any one of claims 1-9, wherein the conveying pipe of the medium feeding device for the heavy medium system of the coal preparation plant is connected to the feed inlet of the heavy medium separator.

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