Screening mechanism with adjustable screen mesh for coal separator

Abstract

The utility model discloses a sieve hole adjustable type screening mechanism for coal selecting machine, include: frame, the casing is established on the frame, a plurality of first guide rod, a plurality of first guide rod fixed setting between the inner wall of both sides of casing, a plurality of sieve bars, a plurality of sieve bars all are established on the first guide rod, and form sieve hole between adjacent sieve bars, and a plurality of sieve bars all are equipped with first spring, adjusting mechanism, adjusting mechanism sets up in the casing, and adjusting mechanism is used for adjusting the distance between a plurality of sieve bars. Compared with prior art, through the adjusting mechanism that sets up, can the interval between a plurality of sieve bars be adjusted synchronously, thereby the size of sieve hole is changed quickly. This design saves the step of replacing the screen, significantly reduces the downtime, improves the production efficiency, and does not need to purchase multiple specifications of screen, reduces the use cost.

Description

Technical Field

[0001] This utility model relates to the field of coal preparation machine technology, and in particular to an adjustable screen separation mechanism for a coal preparation machine. Background Technology

[0002] In the coal washing process, screening is one of the important steps. Coal preparation machines separate coal of different particle sizes through screening.

[0003] Chinese Patent CN221017309U discloses a fluidized bed dry coal preparation machine, including a main body and a feeding buffer mechanism. The main body includes a base frame, a screening hopper, elastic supports, a vibrating motor, and a screen plate. The vibrating motor is installed at the rear end of the screening hopper, which is located above the base frame. Four sets of elastic supports are respectively installed on both sides of the screening hopper and the base frame. The screen plate is fixedly installed inside the screening hopper. The feeding buffer mechanism includes a feeding plate, side plates, an arc-shaped flexible concave plate, and a handle. The top and bottom ends of the feeding plate are hinged together. Two side plates are respectively fixed on both sides of the feeding plate. The handle is installed on the outside of the side plates. The arc-shaped flexible concave plate is located at the bottom of the feeding plate.

[0004] As mentioned above, the existing coal preparation machine screening mechanism has a fixed screen size. In actual production, due to the complex and varied particle size composition of coal, when it is necessary to screen coal of different particle sizes, the entire screen needs to be replaced, which is cumbersome, time-consuming and labor-intensive, and seriously affects production efficiency. Utility Model Content

[0005] The main purpose of this invention is to propose an adjustable screen mechanism for coal preparation machines, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: an adjustable screen aperture screening mechanism for a coal preparation machine, comprising: frame; A housing, which is mounted on a frame; Multiple first guide rods are fixedly disposed between the inner walls of both sides of the housing; Multiple screen bars are provided, each screen bar is mounted on a first guide rod, screen holes are formed between adjacent screen bars, and a first spring is provided between the multiple screen bars; An adjustment mechanism is provided inside the machine housing and is used to adjust the distance between multiple screen bars. A limiting mechanism is provided on the machine housing and is used to limit the position of the screen bars.

[0007] As a further description of the above technical solution, the adjusting mechanism includes a pressure wedge block, which is fixedly disposed at one end of the screen bar. Slide grooves are provided on both inner walls of the machine housing, and a bracket is slidably disposed between the two slide grooves. A second guide rod is fixedly connected between the inner walls of the two sides of the bracket. The second guide rod is provided with a plurality of extrusion wedge blocks adapted to the pressure wedge block. A second spring is provided between the plurality of extrusion wedge blocks. An internal threaded sleeve is fixedly embedded on the upper side wall of the machine housing. An adjusting screw is internally threadedly connected to the internal threaded sleeve. The lower end of the adjusting screw is rotatably connected to the bracket, and the upper end is fixedly connected to a handwheel.

[0008] As a further description of the above technical solution, the limiting mechanism includes a limiting screw, which is threadedly connected to one side wall of the housing. One end of the limiting screw is fixedly connected to a rotating wheel, and the other end extends into the housing and is rotatably connected to a limiting plate. Limiting rods are fixedly connected to one side wall of the limiting plate on both sides of the limiting screw. The other end of the limiting rod slides through the housing and extends to its outer side.

[0009] As a further description of the above technical solution, one of the screen bars near the end of the first guide rod is fixedly connected to the first guide rod, and the remaining screen bars are slidably engaged with the first guide rod.

[0010] As a further description of the above technical solution, one of the extrusion wedges near the end of the second guide rod is fixedly connected to the second guide rod, and the remaining extrusion wedges are slidably connected to the second guide rod.

[0011] As a further description of the above technical solution, a main baffle is fixedly connected to the fixedly connected screen bar, and a secondary baffle is slidably provided inside the main baffle. The secondary baffle is fixedly connected to the screen bar on the side away from the main baffle.

[0012] As a further description of the above technical solution, a vibration motor is installed on the housing.

[0013] As a further description of the above technical solution, the bottom of the housing is provided with a discharge port.

[0014] As a further description of the above technical solution, two guide grooves are formed on the wall of the second guide rod, and the slidably connected extrusion wedge has two guide blocks that are adapted to the guide grooves.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The adjustable mechanism allows for simultaneous adjustment of the spacing between multiple screen bars, thus quickly changing the screen aperture size. This design eliminates the need to replace screens, significantly reducing downtime, improving production efficiency, and eliminating the need to purchase multiple screen sizes, thereby lowering operating costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an adjustable screen aperture screening mechanism for a coal preparation machine according to this utility model; Figure 2 This is a schematic diagram of the screen bar structure of an adjustable screen aperture screening mechanism for a coal preparation machine according to the present invention. Figure 3 This is a schematic diagram of the casing structure of an adjustable screen aperture screening mechanism for a coal preparation machine according to the present invention. Figure 4 This is a schematic diagram of the adjustment mechanism of an adjustable screen for a coal preparation machine according to the present invention. Figure 5 This is a schematic diagram of the limiting plate structure of an adjustable screen hole screening mechanism for a coal preparation machine according to the present invention. Figure 6 This is a schematic diagram of the main baffle structure of an adjustable screen hole screening mechanism for a coal preparation machine according to this utility model. Figure 7 This is a schematic diagram of the second guide rod structure of an adjustable screen hole screening mechanism for a coal preparation machine according to the present invention; In the diagram: 1. Frame; 2. Housing; 3. First guide rod; 4. Screen bar; 41. First spring; 5. Adjustment mechanism; 6. Limiting mechanism; 51. Pressure wedge; 52. Slide groove; 53. Support; 54. Second guide rod; 55. Extrusion wedge; 56. Internal threaded sleeve; 57. Adjusting screw; 58. Handwheel; 551. Second spring; 61. Limiting screw; 62. Rotary wheel; 63. Limiting plate; 64. Limiting rod; 7. Main baffle; 71. Secondary baffle; 8. Vibrating motor; 21. Discharge port; 541. Guide groove; 552. Guide block. Detailed Implementation

[0017] To make the technical means, creative features, and objectives of this utility model easier to understand, the following describes this utility model in conjunction with specific embodiments.

[0018] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Please see Figure 1-7 This utility model provides an adjustable screen aperture screening mechanism for a coal preparation machine, comprising: Rack 1; Housing 2, housing 2 is mounted on frame 1; Multiple first guide rods 3 are fixedly disposed between the inner walls of both sides of the housing 2; Multiple screen bars 4 are arranged on the first guide rod 3, and screen holes are formed between adjacent screen bars 4. A first spring 41 is provided between the multiple screen bars 4. Adjustment mechanism 5 is installed inside the casing 2 and is used to adjust the distance between multiple screen bars 4; Limiting mechanism 6 is installed on the machine housing 2 and is used to limit the screen bar 4.

[0021] The above structure enables coal screening and allows for flexible adjustment of the spacing between screen bars 4, thereby changing the size of the screen holes.

[0022] The adjusting mechanism 5 includes a pressure wedge 51, which is fixedly installed at one end of the screen bar 4. Slide grooves 52 are provided on both inner walls of the machine housing 2. A bracket 53 is slidably installed between the two slide grooves 52. A second guide rod 54 is fixedly connected between the inner walls of the two sides of the bracket 53. Multiple extrusion wedges 55 that are adapted to the pressure wedge 51 are provided on the second guide rod 54. A second spring 551 is provided between the multiple extrusion wedges 55. An internal threaded sleeve 56 is fixedly embedded on the upper side wall of the machine housing 2. An adjusting screw 57 is internally threaded to the internal threaded sleeve 56. The lower end of the adjusting screw 57 is rotatably connected to the bracket 53, and the upper end is fixedly connected to a handwheel 58.

[0023] With the above structure, the spacing between multiple screen bars 4 can be adjusted synchronously, thereby quickly changing the size of the screen holes, eliminating the need to replace the screen, significantly reducing downtime, and improving production efficiency.

[0024] The limiting mechanism 6 includes a limiting screw 61, which is threadedly connected to one side wall of the housing 2. One end of the limiting screw 61 is fixedly connected to a rotating wheel 62, and the other end extends into the housing 2 and is rotatably connected to a limiting plate 63. Limiting rods 64 are fixedly connected to one side wall of the limiting plate 63 and on both sides of the limiting screw 61. The other end of the limiting rod 64 slides through the housing 2 and extends to its outer side.

[0025] By setting the above structure, the screen bar 4 can be limited to prevent it from sliding during the screening process.

[0026] One of the screen bars 4, which is close to the end of the first guide rod 3, is fixedly connected to the first guide rod 3, while the other screen bars 4 are slidably engaged with the first guide rod 3.

[0027] One of the compression wedges 55, which is close to the end of the second guide rod 54, is fixedly connected to the second guide rod 54, while the remaining compression wedges 55 are slidably connected to the second guide rod 54.

[0028] Among them, a main baffle 7 is fixedly connected to the fixedly connected screen bar 4, and a secondary baffle 71 is slidably provided inside the main baffle 7. The secondary baffle 71 is fixedly connected to the screen bar 4 on the side away from the main baffle 7.

[0029] By setting up the above structure, the screen bar 4 can move together with the auxiliary baffle 71 when it moves, so that the auxiliary baffle 71 can extend or retract into the main baffle 7 to control the feeding range and prevent coal from being added outside the main baffle 7 and the auxiliary baffle 71.

[0030] The housing 2 is equipped with a vibration motor 8, which is used to drive the housing 2 to vibrate.

[0031] The bottom of the casing 2 is provided with a discharge port 21, through which the screened coal is discharged.

[0032] The second guide rod 54 has two guide grooves 541 on its rod wall, and the slidably connected extrusion wedge 55 has two guide blocks 552 that are adapted to the guide grooves 541, which guide the extrusion wedge 55 and prevent it from rotating.

[0033] It should be noted that this utility model is an adjustable screen screening mechanism for a coal preparation machine. In use, coal is added between the main baffle 7 and the auxiliary baffle 71. Under the action of the vibrating motor 8, the machine casing 2 drives the screen bars 4 to vibrate, and the coal moves along the screen bars 4. Coal of the correct size will fall through the screen holes between adjacent screen bars 4 into the bottom of the machine casing 1 and be discharged through the discharge port 21. When it is necessary to change the size of the screen holes, the handwheel 58 is turned to drive the adjusting screw 57 to rotate. When the adjusting screw 57 rotates, under the action of the internal threaded sleeve 56, the adjusting screw 57 pushes the support 53 downwards. The downward movement of the support 53 drives the second guide rod 54 and the pressing wedge 55 to move downwards. The inclined surface of the pressing wedge 55 will press against the pressure wedge 51. Due to the leftmost pressing wedge 55 and the leftmost... Since the side screen bar 4 is fixed, the remaining pressure wedges 51 will move to the right under force during the downward movement of the squeezing wedge 55, thereby synchronously changing the spacing between the screen bars 4 and thus enlarging the screen holes. After adjustment, the rotating wheel 62 drives the limiting screw 61 to rotate. When the limiting connecting rod 61 rotates, it can push the limiting plate 63 closer to the rightmost screen bar 4, so that it presses against the screen bar 4, thereby fixing the position of the rightmost screen bar 4 and preventing the screen bar 4 from sliding to the right during screening. When it is necessary to reduce the screen holes, the handwheel 58 is reversed and the adjusting screw 57 pulls the bracket 53 upward. At this time, under the pull of the first spring 41 and the second spring 551, the spacing between the multiple screen bars 4 will decrease synchronously, thereby reducing the screen holes.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A screening mechanism with adjustable screen aperture for a coal preparation machine, characterized in that, include: Rack (1); The housing (2) is mounted on the frame (1); Multiple first guide rods (3) are fixedly disposed between the inner walls of both sides of the housing (2); Multiple sieve bars (4) are provided on a first guide rod (3), and sieve holes are formed between adjacent sieve bars (4). A first spring (41) is provided between the multiple sieve bars (4). Adjustment mechanism (5), which is located inside the housing (2), is used to adjust the distance between multiple screen bars (4); A limiting mechanism (6) is provided on the housing (2) and is used to limit the screen bar (4).

2. The adjustable screen aperture screening mechanism for a coal preparation machine according to claim 1, characterized in that, The adjusting mechanism (5) includes a pressure wedge (51), which is fixedly installed at one end of the screen bar (4). Slide grooves (52) are provided on both sides of the inner wall of the housing (2). A bracket (53) is slidably provided between the two slide grooves (52). A second guide rod (54) is fixedly connected between the two sides of the inner wall of the bracket (53). Multiple extrusion wedges (55) that are adapted to the pressure wedge (51) are provided on the second guide rod (54). A second spring (551) is provided between the multiple extrusion wedges (55). An internal thread sleeve (56) is fixedly embedded on the upper side wall of the housing (2). An adjusting screw (57) is internally threaded on the internal thread sleeve (56). The lower end of the adjusting screw (57) is rotatably connected to the bracket (53), and a handwheel (58) is fixedly connected to the upper end.

3. The adjustable screen aperture screening mechanism for a coal preparation machine according to claim 1, characterized in that, The limiting mechanism (6) includes a limiting screw (61), which is threadedly connected to one side wall of the housing (2). One end of the limiting screw (61) is fixedly connected to a rotating wheel (62), and the other end extends into the housing (2) and is rotatably connected to a limiting plate (63). On one side wall of the limiting plate (63) and on both sides of the limiting screw (61), a limiting rod (64) is fixedly connected. The other end of the limiting rod (64) slides through the housing (2) and extends to its outer side.

4. The adjustable screen aperture screening mechanism for a coal preparation machine according to claim 1, characterized in that, One of the screen bars (4) near the end of the first guide rod (3) is fixedly connected to the first guide rod (3), and the remaining screen bars (4) are slidably engaged with the first guide rod (3).

5. The adjustable screen aperture screening mechanism for a coal preparation machine according to claim 2, characterized in that, One of the compression wedges (55) near the end of the second guide rod (54) is fixedly connected to the second guide rod (54), and the remaining compression wedges (55) are slidably connected to the second guide rod (54).

6. The adjustable screen aperture screening mechanism for a coal preparation machine according to claim 4, characterized in that, A main baffle (7) is fixedly connected to the fixedly connected screen bar (4), and a secondary baffle (71) is slidably provided inside the main baffle (7). The secondary baffle (71) is fixedly connected to the screen bar (4) on the side away from the main baffle (7).

7. The adjustable screen aperture screening mechanism for a coal preparation machine according to claim 1, characterized in that, A vibration motor (8) is installed on the housing (2).

8. The adjustable screen aperture screening mechanism for a coal preparation machine according to claim 1, characterized in that, The bottom of the housing (2) is provided with a discharge port (21).

9. A screen-measuring mechanism with adjustable screen aperture for a coal preparation machine according to claim 5, characterized in that, The second guide rod (54) has two guide grooves (541) on its rod wall, and the slidably connected extrusion wedge (55) has two guide blocks (552) that are adapted to the guide grooves (541).

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