A vibrating screen for use in a coal mine underground

Abstract

The utility model provides a kind of vibrating screen for coal mine underground, it is related to coal mine screening technical field, sieve plate subassembly includes upper sieve plate and lower sieve plate, upper sieve plate and lower sieve plate are opened and the hole of corresponding distribution position, size, the connection of lower sieve plate and upper sieve plate has two states of relative sliding and relative fixation.The utility model is changed by the setting of sieve plate subassembly, the device can be according to actual coal mining out the particle size variation of coal before screening, and the variation of required separation granularity size, can timely adjust the size of screen hole, improve the pertinence of screening operation, reduce the loss of unqualified material due to screen hole fixation, by effective screening, it can greatly improve the efficiency of coal handling, also can improve the uniformity of granularity size in the same level of screening;On the other hand, the device can also be applied in repeated screening, can efficiently realize the classification of coal multi-level different granularity size material, improve the efficiency of coal screening treatment.

Description

Technical Field

[0001] This utility model relates to the field of coal mine screening technology, specifically a vibrating screen for underground coal mines. Background Technology

[0002] A vibrating screen for underground coal mines is a screening device used in underground coal mines. Its main function is to screen raw coal or other materials extracted from the mine. Through screening, coal dust of different particle sizes is separated, and coarse coal and fine coal can be separated to facilitate the rational planning of subsequent transportation and storage. Vibrating screens are commonly used in the coal production process of coal mines, especially in the processes of coal washing, sorting and transportation.

[0003] Existing vibrating screens used in underground coal mines have fixed screen aperture sizes, making it difficult to target the size of raw coal particles. Furthermore, the degree of fineness in the gradation of the screened coal particles is difficult to control, which can easily lead to inconsistent particle sizes within the same gradation. Utility Model Content

[0004] The purpose of this utility model is to provide a vibrating screen for underground coal mines, in order to solve the problem mentioned in the background art that the existing vibrating screens for underground coal mines have fixed screen hole sizes, making it difficult to specifically screen the size of raw coal particles, and the degree of subdivision of the screened coal particle size is not easy to control, which easily leads to the problem that the particle size of the screened particles in the same level is not uniform.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a vibrating screen for underground coal mines, comprising a base, a spring support column, and a screen frame. The screen frame is mounted on the base via the spring support column. A vibration connector is provided on the screen frame, and the vibration connector is driven by a vibration motor. A screen plate assembly is provided inside the screen frame. The screen plate assembly includes an upper screen plate and a lower screen plate. The upper and lower screen plates have holes of corresponding distribution and size. The connection between the lower and upper screen plates can be either relatively sliding or relatively fixed.

[0006] Preferably, the sieve plate assembly further includes a frame, which is installed inside the sieve frame. The upper sieve plate is fixedly connected inside the sieve frame, and the lower sieve plate is in two states within the sieve frame: a horizontal sliding connection and a fixed connection.

[0007] Preferably, a lower screen plate positioning component is provided at the bottom of the lower screen plate. The lower screen plate positioning component includes a connecting block fixedly connected to the bottom of the lower screen plate, a limiting component that fixes the lower screen plate relative to the falling direction frame of the frame, and a moving component that allows the lower screen plate to slide relative to the falling direction frame of the frame. The limiting component and the moving component are both connected to the side of the connecting block away from the lower screen plate.

[0008] Preferably, the limiting member includes a first rod, an elastic washer, and a nut. The first rod is fixedly connected to the side of the connecting block away from the lower screen plate. The first rod passes through the falling direction frame from the inside to the outside and is threadedly connected to the nut on the outside of the falling direction frame. An elastic washer is sleeved around the first rod between the nut and the falling direction frame.

[0009] Preferably, the moving part includes a second rod, a roller, and a handle. The second rod is fixedly connected to the side of the connecting block away from the lower screen plate. The falling direction frame is provided with a horizontal groove. The second rod passes through the groove of the falling direction frame and is hinged to the roller at the groove. The handle is fixedly connected to the end of the second rod located outside the falling direction frame.

[0010] Preferably, a double-layer screen plate assembly is provided inside the screen frame, and a bottom plate is provided below the lower screen plate assembly inside the screen frame.

[0011] Preferably, an agitation assembly is provided above the screen frame. The agitation assembly includes a support, a conventional motor, an output shaft, and a rod frame. The two ends of the support are fixedly connected to the side plates of the screen frame. The body of the conventional motor is fixedly connected to the upper middle part of the support. The output shaft of the conventional motor is hinged to the support and the rod frame is fixedly connected to the lower part of the support. The rod frame includes a top plate and agitation rods. Multiple sets of agitation rods are arranged below the top plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, through the setting of the screen plate assembly, allows the device to adjust the screen aperture size in a timely manner according to the changes in the particle size of coal before screening and the changes in the required separation particle size, thereby improving the targeting of the screening operation and reducing the loss of unqualified materials caused by fixed screen apertures. Through effective screening, the efficiency of coal processing can be greatly improved, and the uniformity of particle size in the same screening level can be improved, thus improving the quality of the screened coal. On the other hand, this device can also be applied to repeated screening, which can efficiently realize the classification of coal materials of different particle sizes in multiple levels, thereby improving the efficiency of coal screening and processing.

[0013] 2. By setting up a stirring component, this utility model allows the ordinary motor to drive the rod frame to rotate back and forth slightly to the left and right when the coal material is fed into the screen frame and falls onto the upper screen plate. The stirring rod moves back and forth in the coal material, reducing the falling speed of the material. At the same time, while turning the material, small-sized coal particles fall more easily and completely, reducing the situation where small-sized materials are not carried away by the lower layer, improving separation efficiency, and ensuring the uniformity of the size of coal particles in the same layer after separation. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the structure of the vibrating screen for underground coal mines according to this utility model.

[0015] Figure 2 This is a schematic diagram of the sieve plate assembly structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the lower sieve plate positioning component of this utility model.

[0017] Figure 4 This is a cross-sectional schematic diagram of the positional relationship of the limiting component of this utility model.

[0018] Figure 5 This is a cross-sectional schematic diagram of the positional relationship of the moving part of this utility model.

[0019] Figure 6 This is a schematic diagram showing the installation position of the cross brace of this utility model.

[0020] Figure 7 This is a schematic diagram of the stirring component structure of this utility model.

[0021] In the diagram: 1. Base; 2. Spring support; 3. Screen frame; 31. Vibration connector; 311. Vibration motor; 4. Screen plate assembly; 401. Hole; 41. Frame; 411. Falling direction frame bar; 4111. Slide groove; 412. Horizontal support rod; 4121. Slider; 42. Upper screen plate; 43. Lower screen plate; 44. Lower screen plate positioning component; 441. Connecting block; 442. Limiting component; 4421. First rod; 4422. Elastic washer; 4423. Nut; 443. Moving component; 4431. Second rod; 4432. Roller; 4433. Handle; 5. Base plate; 6. Agitator assembly; 61. Bracket; 62. Ordinary motor; 63. Output shaft; 64. Insert rod frame; 641. Top plate; 642. Agitator rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] One embodiment of this utility model provides: a vibrating screen for use in underground coal mines, such as... Figure 1 As shown, it includes a base 1, a spring support 2, a screen frame 3, a screen plate assembly 4, a bottom plate 5, and an agitator assembly 6.

[0024] like Figure 1As shown, the screen frame 3 is mounted on the base 1 via spring supports 2. A vibration connector 31 is installed on the screen frame 3, which is driven by a vibration motor 311. The screen frame 3 contains a screen plate assembly 4 and a base plate 5. During operation, the vibration motor 311 generates vibration force through its eccentric block or exciter, causing the entire screen frame 3 to move periodically. This causes the screen plate assembly 4 to vibrate as well, thus screening the coal material falling onto the screen plate assembly 4.

[0025] A double-layer screen plate assembly 4 is installed inside the screen frame 3, and the bottom plate 5 is located below the lower layer of the screen plate assembly 4 inside the screen frame 3. Broken coal materials of different particle sizes fall from top to bottom into the inclined screen plate assembly 4 on the higher side of the screen frame 3. Particles larger than the screen holes remain on the screen surface, while particles smaller than the screen holes pass through both layers of screen holes and finally fall onto the bottom plate 5. This achieves the separation of coarse and fine particles, separating three different grades of coal materials, which are collected at the lower positions of the double-layer screen plate assembly 4 and the bottom plate 5, respectively, completing the screening process and facilitating the rational planning of subsequent transportation and storage.

[0026] like Figure 2 As shown, the sieve plate assembly 4 includes a frame 41, an upper sieve plate 42, a lower sieve plate 43, and a lower sieve plate positioning component 44. The upper sieve plate 42 and the lower sieve plate 43 have corresponding holes 401 in their respective positions and sizes. The connection between the lower sieve plate 43 and the upper sieve plate 42 can be either relatively sliding or relatively fixed. The frame 41 is installed inside the sieve frame 3, and the upper sieve plate 42 is fixedly connected within the frame of the sieve frame 3. The outer diameter of the upper sieve plate 42 matches the inner diameter of the sieve frame 3. The lower sieve plate 43, through the lower sieve plate positioning component 44, can be either laterally sliding or fixedly connected within the frame of the sieve frame 3. The lateral dimension of the lower sieve plate 43 is smaller than the lateral dimension of the upper sieve plate 42. In the initial state, the holes 401 of the lower screen plate 43 and the upper screen plate 42 are completely aligned vertically. The lower screen plate 43 is moved horizontally in one direction so that its holes 401 overlap with the holes 401 of the upper screen plate 42, and the screen plate assembly 4 as a whole can reduce the size of the screen holes that allow coal particles to pass through.

[0027] like Figure 3 , Figure 4 and Figure 5As shown, the lower screen plate positioning component 44 is located at the bottom of the lower screen plate 43. The lower screen plate positioning component 44 includes a connecting block 441 fixedly connected to the bottom of the lower screen plate 43, a limiting component 442 that fixes the lower screen plate 43 relative to the falling direction frame 411 of the frame 41, and a moving component 443 that allows the lower screen plate 43 to slide relative to the falling direction frame 411 of the frame 41. The limiting component 442 and the moving component 443 are both connected to the side of the connecting block 441 away from the lower screen plate 43. The lower screen plate positioning component 44 is symmetrically arranged on the left and right sides of the falling direction frame 411, which improves the stability of the lower screen plate 43 when it is adjusted to a moving or fixed state.

[0028] The limiting component 442 includes a first rod 4421, an elastic washer 4422, and a nut 4423. The first rod 4421 is fixedly connected to the side of the connecting block 441 away from the lower screen plate 43. The first rod 4421 passes through the falling direction frame 411 from the inside to the outside, and the nut 4423 is threadedly connected to the outside of the falling direction frame 411. The elastic washer 4422 is sleeved around the first rod 4421 between the nut 4423 and the falling direction frame 411. When the nut 4423 is tightened, the elastic washer 4422 is compressed and pressed tightly against the vertical surface of the nut 4423 and the falling direction frame 411. The material of the elastic washer 4422 increases the friction, improving the firmness of the lower screen plate 43 when it is relatively fixed to the frame 41.

[0029] The movable component 443 includes a second rod 4431, a roller 4432, and a handle 4433. The second rod 4431 is fixedly connected to the side of the connecting block 441 away from the lower screen plate 43. The falling direction frame 411 has a transverse groove 4111. The second rod 4431 passes through the groove 4111 of the falling direction frame 411 and is correspondingly hinged to the roller 4432 at the groove 4111. The handle 4433 is fixedly connected to the end of the second rod 4431 located outside the falling direction frame 411. The first rod 4421 passes through the falling direction frame 411 exactly inside the groove 4111.

[0030] like Figure 6 As shown, in order to maintain the stability of the lower screen plate 43 when it slides laterally relative to the frame 41, a horizontal support rod 412 is provided on the inner side of the frame 41 below the lower screen plate 43. The lower screen plate 43 is slidably connected to the horizontal support rod 412 through a slider 4121.

[0031] Before screening coal materials, the relative positions of the upper screen plate 42 and the lower screen plate 43 can be adjusted by the lower screen plate positioning component 44 to change the actual screen hole size. When adjusting the screen hole size, first adjust all the limiting components 442, loosen the nut 4423, and the side length of the first rod 4421 between the nut 4423 and the connecting block 441 and the falling direction frame 411 are unrestrained. At this time, push the handle 4433 to make the lower screen plate 43 slide laterally relative to the frame 41, and the roller 4432 moves in the slide groove 4111. The final position of the lower screen plate 43 is adjusted according to the required screen hole size. The remaining size after the holes 401 of the lower screen plate 43 and the upper screen plate 42 overlap, which allows coal particles to pass through, is the screen hole size. After the lower screen plate 43 is in the determined position, tighten the nut 4423 again to fix the lower screen plate 43 and the frame 41, thus completing the adjustment of the screen hole size.

[0032] After adjusting the upper sieve plate assembly 4, adjust the size of the sieve holes in the lower sieve plate assembly 4 according to the size required for secondary sieve screening in the lower sieve plate assembly 4.

[0033] This device, through the adjustable screen plate assembly 4, can, on the one hand, adjust the screen aperture size in a timely manner according to the changes in the particle size of coal before screening and the changes in the required separation particle size, thereby improving the targeting of the screening operation and reducing the loss of unqualified materials caused by fixed screen apertures. Through effective screening, the efficiency of coal processing can be greatly improved, and the uniformity of particle size in the same screening level can be improved, thus improving the quality of the screened coal. On the other hand, this device can also be used in repeated screening situations. When high precision screening and grading of coal materials is required, the device can be reused. The coal material collected from the outlet of the bottom plate 5 after one round of screening can be put back into the screen frame 3 for screening again. Before this screening, the screen apertures of the screen plate assembly 4 are adjusted to be smaller than the previous aperture, resulting in multi-level separation of coal materials. If necessary, multiple rounds of screening can be repeated. This operation can efficiently classify coal materials of different particle sizes in multiple levels, replacing the operation method of increasing the number of screening layers or screening equipment in the original technology, saving costs and improving the efficiency of coal screening and processing.

[0034] like Figure 7As shown, in order to alleviate the problem of coal material accumulating easily when it is put into the screen frame 3, an agitation component 6 is also provided above the screen frame 3. The agitation component 6 includes a support 61, a general motor 62, an output shaft 63, and a rod frame 64. The two ends of the support 61 are fixedly connected to the side plates of the screen frame 3. The body of the general motor 62 is fixedly connected to the upper middle part of the support 61. The output shaft 63 of the general motor 62 is hinged to the support 61 and the rod frame 64 is fixedly connected below the support 61. The rod frame 64 includes a top plate 641 and agitation rods 642. Multiple sets of agitation rods 642 are arranged below the top plate 641. For coal and mineral materials fed into the screen frame 3 and falling onto the upper screen plate 42, the ordinary motor 62 drives the insert rod frame 64 to rotate back and forth slightly. The stirring rod 642 moves back and forth in the coal and mineral materials, reducing the falling speed of the materials. At the same time, while turning the materials, small-sized coal particles fall more easily and completely, reducing the situation where small-sized materials are not carried away by the lower layer, improving separation efficiency, and ensuring the uniformity of the size of coal and mineral materials of the same level after separation.

[0035] The above are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics in the solutions has not been described in detail here. It will be apparent to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A vibrating screen for use in underground coal mines, comprising a base (1), a spring support column (2), and a screen frame (3), wherein the screen frame (3) is mounted above the base (1) via the spring support column (2), and a vibrating connector (31) is provided on the screen frame (3), the vibrating connector (31) being driven by a vibrating motor (311), characterized in that: The sieve frame (3) is provided with a sieve plate assembly (4), which includes an upper sieve plate (42) and a lower sieve plate (43). The upper sieve plate (42) and the lower sieve plate (43) have holes (401) with corresponding distribution positions and sizes. The connection between the lower sieve plate (43) and the upper sieve plate (42) has two states: relative sliding and relative fixing.

2. The vibrating screen for underground coal mines according to claim 1, characterized in that: The sieve plate assembly (4) also includes a frame (41), which is installed inside the sieve frame (3). The upper sieve plate (42) is fixedly connected inside the sieve frame (3), and the lower sieve plate (43) is in two states: a horizontal sliding connection and a fixed connection inside the sieve frame (3).

3. A vibrating screen for underground coal mines according to claim 2, characterized in that: The lower sieve plate (43) is provided with a lower sieve plate positioning component (44) at the bottom. The lower sieve plate positioning component (44) includes a connecting block (441) fixedly connected to the bottom of the lower sieve plate (43), a limiting component (442) that fixes the lower sieve plate (43) relative to the falling direction frame (411) of the frame (41), and a moving component (443) that slides relative to the falling direction frame (411) of the frame (41). The limiting component (442) and the moving component (443) are both connected to the side of the connecting block (441) away from the lower sieve plate (43).

4. A vibrating screen for underground coal mines according to claim 3, characterized in that: The limiting member (442) includes a first rod (4421), an elastic washer (4422), and a nut (4423). The first rod (4421) is fixedly connected to the side of the connecting block (441) away from the lower screen plate (43). The first rod (4421) passes through the falling direction frame (411) from the inside to the outside, and the nut (4423) is threadedly connected to the outside of the falling direction frame (411). The elastic washer (4422) is sleeved around the first rod (4421) between the nut (4423) and the falling direction frame (411).

5. A vibrating screen for underground coal mines according to claim 3, characterized in that: The moving part (443) includes a second rod (4431), a roller (4432) and a handle (4433). The second rod (4431) is fixedly connected to the side of the connecting block (441) away from the lower screen plate (43). The falling direction frame (411) is provided with a sliding groove (4111) in the transverse direction. The second rod (4431) passes through the sliding groove (4111) of the falling direction frame (411) and is hinged to the roller (4432) at the sliding groove (4111). The handle (4433) is fixedly connected to one end of the second rod (4431) located outside the falling direction frame (411).

6. A vibrating screen for underground coal mines according to claim 1, characterized in that: The screen frame (3) is provided with a double-layer screen plate assembly (4) inside, and a bottom plate (5) is provided below the lower screen plate assembly (4) inside the screen frame (3).

7. A vibrating screen for underground coal mines according to claim 1, characterized in that: An agitation assembly (6) is provided above the sieve frame (3). The agitation assembly (6) includes a bracket (61), a common motor (62), an output shaft (63), and a rod frame (64). The two ends of the bracket (61) are fixedly connected to the side plates of the sieve frame (3). The body of the common motor (62) is fixedly connected to the upper middle part of the bracket (61). The output shaft (63) of the common motor (62) is hinged to the bracket (61) and the rod frame (64) is fixedly connected below the bracket (61). The rod frame (64) includes a top plate (641) and agitation rods (642). Multiple sets of agitation rods (642) are arranged below the top plate (641).

Images