Polyurethane screen for sticky fine coal

Abstract

The utility model discloses a kind of polyurethane screen mesh of viscous fine particle size raw coal, it is related to screening equipment technical field.The utility model includes screen mesh body;Screen mesh body's upside wall left end is equipped with screen mesh sliding slot, the front and back sides of the bottom side wall of screen mesh body are all provided with vibration subassembly, vibration subassembly includes the rubber sleeve that is bonded on the bottom side wall of screen mesh body, the inside of rubber sleeve is provided with cam, and cam's axis center is installed with wheel shaft, the outside end of wheel shaft is installed with linkage, the right end of the bottom side wall of screen mesh body is installed with extension component, extension component includes the I-joist that is fixed on the bottom side wall of screen mesh body, and the bottom of I-joist is respectively provided with elastic piece one and elastic piece two on upside and downside.The utility model can improve the strength toughness, corrosion resistance and durability of screen mesh by vulcanized steel wire rope and polyurethane layer, when screen mesh is vibrated up and down by extension component, screen mesh connected by mutual ladder does not produce gap.

Description

Technical Field

[0001] This utility model belongs to the technical field of screening equipment, and in particular relates to a polyurethane screen for viscous fine-grained raw coal. Background Technology

[0002] Sticky fine-grained raw coal refers to raw coal with strong stickiness and small particle size. This type of coal is prone to clogging the screen during screening, affecting screening efficiency. Therefore, when screening sticky fine-grained raw coal, it is necessary to use a tension screen type screening equipment. The tension screen adopts a dual-mass vibration system, which consists of the linear vibration of the main screen body and the additional vibration of the floating screen frame, thereby preventing material from adhering to the screen and clogging the screen holes.

[0003] Chinese patent application CN209549963U discloses a string tension screen, comprising a first support frame, a fixed column, a second support frame, a discharge box, a floating frame, a first motor, a swing cam, a fixed frame, a screen box, a second motor, a string screen mesh, a string fixing frame, a string support, a rotating cam, a feed inlet, a fixed crossbeam, a third motor, a crushing box, a crushing roller, and a rotating shaft. Fixed crossbeams are installed through both ends of the screen box, and a bearing is embedded in the top of the first support frame. This utility model, a string screen with active screen cleaning, has a reasonable structure, high screening efficiency, good environmental performance, low noise, and low energy consumption. Its actively cleaning string screen mesh has a significant anti-clogging effect and has great potential for application in screening wet, sticky, fine-grained raw coal and other similar materials. Before screening, the third motor drives the crushing roller to crush the coal lumps, facilitating better screening.

[0004] The aforementioned string-type tension screen has three rotating cams at the bottom of each string screen mesh. The string screen meshes are arranged in a stepped structure, with each end connected. When the rotating cams push the string screen meshes to oscillate, gaps are created between the stepped meshes, causing sticky, fine-grained raw coal to flow out. Furthermore, the string screen structure, made of woven steel wire rope, while possessing high strength, has poor elasticity. When sticky, fine-grained raw coal falls onto it for screening, it generates significant noise. Moreover, the sticky, fine-grained raw coal is often moist, and prolonged screening of this moist material can cause the string screen meshes to rust. Therefore, we provide a polyurethane screen for sticky, fine-grained raw coal to solve the aforementioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a polyurethane screen for sticky, fine-grained raw coal. The strength, toughness, corrosion resistance, and durability of the screen can be improved by using vulcanized steel wire rope and polyurethane layer. The extension component ensures that the interconnected screens do not produce gaps when the screen vibrates up and down, thus solving the problems of an existing string tension screen.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a polyurethane screen for viscous fine-grained raw coal, comprising a screen body; a screen groove is provided at the left end of the upper side wall of the screen body, and the front and rear side walls of the screen groove are covered with side cover plates; vibration components are provided on both the front and rear sides of the bottom side wall of the screen body; the vibration components include a rubber sleeve bonded to the bottom side wall of the screen body, a cam is provided inside the rubber sleeve, and a wheel axle is mounted on the axis of the cam; a linkage component is installed at the outer end of the wheel axle; an extension component is installed at the right end of the bottom side wall of the screen body, the extension component includes an I-beam plate fixed to the bottom side wall of the screen body, and elastic element one and elastic element two are respectively provided on the upper and lower sides of the bottom of the I-beam plate.

[0007] The present invention is further configured such that the screen groove penetrates the front and rear side walls of the screen body, and fixing bolts are provided at the four connection points of the side cover plate, and the side cover plate is connected to the outer wall of the screen groove through the fixing bolts.

[0008] The present invention is further configured such that vibration grooves are provided at both the front and rear ends of the bottom sidewall of the screen body, the rubber sleeve is bonded to the vibration groove, and multiple cams are provided at equal intervals inside the rubber sleeve.

[0009] The present invention is further configured such that the cams are equally spaced, and the cams are connected to the vibration groove through rubber sleeves. The linkage includes a grooved gear sleeved on the wheel axle, and the grooved gears are meshed and connected by a toothed belt.

[0010] The present invention is further configured such that the grooved gear located on the central axis of the screen body has the largest diameter, and the diameters of the other grooved gears located on both sides of the central axis decrease sequentially to both sides.

[0011] The present invention is further configured such that an installation groove is provided at the right end of the bottom side wall of the screen body, the upper end of the I-beam is connected to the installation groove by an installation bolt, and a plate hole one and a plate hole two are respectively provided in the bottom upper and lower side walls of the I-beam.

[0012] The present invention is further configured such that the first elastic element includes a first spring fixed in the first plate hole, and a sleeve plate is fixedly provided on the upper side wall of the first spring. The sleeve plate is also slidably sleeved with the vertical side wall of the I-beam plate. The second elastic element includes a second spring fixed in the second plate hole, and a sliding plate is fixedly installed on the bottom side wall of the second spring.

[0013] The present invention is further configured such that the screen body consists of two parts: a skeleton and an outer coating. The skeleton is woven from vulcanized steel wire rope, and the outer coating is composed of a polyurethane layer.

[0014] This utility model has the following beneficial effects: This utility model features a screen body and a vibration assembly. The screen body consists of a frame and an outer coating. The frame is woven from vulcanized steel wire rope, and the outer coating is made of polyurethane. The polyurethane layer improves the corrosion resistance and durability of the frame, while the vulcanized steel wire rope enhances its elasticity and toughness. Vibration grooves are formed at both ends of the bottom sidewall of the screen body. A vibration assembly is installed within each groove. The vibration assembly includes a rubber sleeve bonded to the groove, and multiple equally spaced cams are installed within the rubber sleeve. A wheel axle is mounted on the axis of each cam, and a linkage component is installed at the end of the wheel axle. The linkage component includes a grooved gear mounted on the wheel axle. The grooved gear located on the central axis of the screen body has the largest diameter. The diameter of the grooved gears decreases sequentially towards both sides. All grooved gears are connected by meshing with a toothed belt. In use, the shaft on the largest grooved gear is connected to the motor via a coupling. With the power of the motor, the shaft rotates, which in turn drives the grooved gears to rotate. Since the grooved gears are meshed with the toothed belt, all the grooved gears rotate synchronously, which in turn drives all the cams to rotate. When the cams rotate, their protrusions intermittently contact the rubber sleeve in the vibration groove at the bottom of the screen body, thereby achieving the effect of pushing the screen body to move up and down. Furthermore, the presence of the rubber sleeve greatly reduces the impact noise generated when the cam contacts the screen body.

[0015] This utility model, through the arrangement of a screen body and an extension component, features a screen groove on the left sidewall of the screen body, with cover plates at both ends of the groove connected to the screen body via bolts. An extension component is fixedly mounted on the right sidewall of the bottom sidewall of the screen body. The extension component includes an I-beam plate fixed to the bottom sidewall of the screen body via bolts. The upper sidewall of the bottom of the I-beam plate has a first plate hole, and the lower sidewall has a second plate hole. The first plate hole is used for mounting an elastic element, and the second plate hole is used for mounting an elastic element. The first elastic element includes a spring fixed within the first plate hole, with a sleeve plate fixedly mounted on its upper sidewall. This sleeve plate also slides against the vertical sidewall of the I-beam plate. The second elastic element includes a spring fixed within the second plate hole, with a sliding plate fixedly mounted on its bottom sidewall. In use, the upper end of the I-beam plate is fixed to the mounting groove on the bottom sidewall of the screen body via bolts, and then the sleeve plate and sliding plate are pressed down. Compression of springs one and two brings the sleeve plate and slide plate closer together. At this point, the I-beam plate on the screen body is aligned with the screen groove on the next-level screen body and inserted from the side of the groove. After the I-beam plate enters the screen groove, the sleeve plate and slide plate are released, and the I-beam plate is continuously pushed until it is fully inside the screen groove. At this point, springs one and two lose their pressing force, which pushes the sleeve plate and slide plate upwards or downwards, abutting against the inner walls of the upper and lower sides of the screen groove. With the power support of the vibration assembly, the screen body vibrates up and down. During this process, because the I-beam plate remains within the screen groove, it does not detach, thus sealing the gaps between the multi-stage screen bodies. It also adjusts itself during vibration. Furthermore, the presence of elastic elements one and two prevents excessive impact vibration of the screen body and provides a certain degree of buffering and noise reduction. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0017] Figure 1 This is a schematic diagram of the structure of a polyurethane screen for viscous, fine-grained raw coal.

[0018] Figure 2 This is a schematic diagram of the structure of the screen body. Figure 1 .

[0019] Figure 3 This is a schematic diagram of the structure of the screen body. Figure 2 .

[0020] Figure 4 This is a schematic diagram of the vibration assembly.

[0021] Figure 5This is a structural disassembly diagram of the vibration assembly.

[0022] Figure 6 This is a schematic diagram of the structure of the extension component.

[0023] Figure 7 This is a structural disassembly diagram of the extension component.

[0024] Figure 8 This is a schematic diagram of the sliding plate.

[0025] Figure 9 This is a cross-sectional view of the warp threads of the screen body.

[0026] The attached diagram lists the components represented by each number as follows: 1-Screen body, 101-Screen chute, 102-Vibration groove, 103-Mounting groove, 104-Vulcanized steel wire rope, 105-Polyurethane layer, 2-Side cover plate, 201-Fixing bolt, 3-Vibration assembly, 301-Rubber sleeve, 302-Cam, 302a-Wheel shaft, 303-Linkage component, 303a-Groove gear, 303b-Toothed belt, 4-Extension assembly, 401-I-beam plate, 401a-Mounting bolt, 401b-Plate hole one, 401c-Plate hole two, 402-Elastic component one, 402a-Sleeve plate, 402b-Spring one, 403-Elastic component two, 403a-Slide plate, 403b-Spring two. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Example 1

[0028] Please see Figure 1-5 This utility model is a polyurethane screen for sticky fine-grained raw coal, including a screen body 1 and a vibration component 3. The vibration component 3 can drive the screen body 1 to move up and down, thereby providing power support for the screen body 1 to vibrate up and down, and can also effectively reduce noise during the vibration process.

[0029] Specifically, vibration grooves 102 are provided at both the front and rear ends of the bottom sidewall of the screen body 1. Vibration components 3 are installed in the vibration grooves 102. The vibration components 3 include a rubber sleeve 301 bonded to the inner wall of the vibration groove 102 and a cam 302 disposed in the rubber sleeve 301.

[0030] Furthermore, multiple cams 302 are provided, and the cams 302 are equally spaced. A wheel axle 302a is also mounted on the shaft of the cam 302, and a linkage 303 is mounted on the outer end of the wheel axle 302a. The linkage 303 includes a grooved gear 303a sleeved on the wheel axle 302a. The grooved gear 303a located on the central axis of the screen body 1 has the largest diameter, and the diameters of the other grooved gears 303a decrease sequentially to both sides. All grooved gears 303a are connected by meshing through a toothed belt 303b.

[0031] The operation process of this embodiment is as follows: In use, the axle 302a on the largest grooved gear 303a is connected to the motor through a coupling. With the power support of the motor, the axle 302a can be rotated, which in turn drives the grooved gear 303a to rotate. Since the grooved gear 303a is meshed with the toothed belt 303b, all the grooved gears 303a will rotate synchronously, which will also drive all the cams 302 to rotate. When the cam 302 rotates, its protruding part will intermittently contact the rubber sleeve 301 in the vibration groove 102 at the bottom of the screen body 1, thereby achieving the effect of pushing the screen body 1 to move up and down. Furthermore, the presence of the rubber sleeve 301 greatly reduces the impact noise generated when the cam 302 contacts the screen body 1. Example 2

[0032] Please see Figure 6-8 Based on embodiment 1, a screen body 1 and an extension component 4 are also provided. The extension component 4 ensures that the screen bodies 1, which are connected in a stepped manner, do not produce gaps when the screen body 1 vibrates up and down.

[0033] Specifically, a screen groove 101 is provided on the upper left side wall of the screen body 1, and an installation groove 103 is provided on the bottom right side wall of the screen body 1. Side cover plates 2 are provided on both the front and rear sides of the screen groove 101, and the side cover plates 2 are fixedly connected to the screen body 1 by fixing bolts 201.

[0034] Furthermore, the extension component 4 includes an I-beam plate 401 fixed in the mounting groove 103 by mounting bolts 401a. The upper side wall of the bottom of the I-beam plate 401 has a plate hole 401b and the lower side wall has a plate hole 401c. Elastic element 402 includes a spring 402b fixed in a plate hole 401b, and a sleeve plate 402a is fixedly provided on the upper side wall of the spring 402b. The sleeve plate 402a is also slidably sleeved with the vertical side wall of the I-beam plate 401. Elastic element 403 includes a spring 403b fixed in a plate hole 401c, and a sliding plate 403a is fixedly installed on the bottom side wall of the spring 403b.

[0035] The operation process of this embodiment is as follows: In use, the upper end of the I-beam plate 401 is fixed in the mounting groove 103 on the bottom side wall of the screen body 1 by the mounting bolt 401a. Then, the sleeve plate 402a and the sliding plate 403a are pressed down, and the springs 402b and 403b are compressed, so that the sleeve plate 402a and the sliding plate 403a are brought closer to each other. At this time, the I-beam plate 401 on the screen body 1 is aligned with the screen slide groove 101 on the next stage screen body 1, and is inserted into the screen slide groove 101 from the side. After the I-beam plate 401 enters the screen slide groove 101, the sleeve plate 402a and the sliding plate 403a can be released, and the I-beam plate 401 is continuously pushed until the I-beam plate 401 is completely inserted into the screen. When the screen slide 101 stops, springs 402b and 403b lose their pressing force, which in turn pushes the sleeve plate 402a and the slide plate 403a to move up or down and abut against the inner walls of the upper and lower sides of the screen slide 101. Under the power support of the vibration component 3, the screen body 1 will vibrate up and down. During this process, since the I-beam plate 401 is always inside the screen slide 101, there will be no separation phenomenon. This can seal the gap between the multi-stage screen bodies 1 and adjust itself with the vibration process. Furthermore, due to the presence of elastic element 402 and elastic element 403, excessive impact vibration of the screen body 1 is avoided, and a certain buffering and noise reduction effect is also achieved. Example 3

[0036] Please see Figure 9 Based on Examples 1 and 2, a screen body 1 is also provided. The strength, toughness, corrosion resistance and durability of the screen body 1 can be improved by using vulcanized steel wire rope 104 and polyurethane layer 105.

[0037] Specifically, the screen body 1 consists of two parts: a skeleton and an outer coating. The skeleton is woven from vulcanized steel wire rope 104, and the outer coating is composed of a polyurethane layer 105.

[0038] Furthermore, the polyurethane layer 105 improves the corrosion resistance and durability of the skeleton woven from the vulcanized steel wire rope 104, while the vulcanized steel wire rope 104 enhances the elasticity and toughness of the skeleton.

[0039] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A polyurethane screen for sticky, fine-grained raw coal, comprising a screen body (1); characterized in that: The upper sidewall of the screen body (1) is provided with a screen groove (101) at the left end, and the front and rear sidewalls of the screen groove (101) are covered with side cover plates (2). The front and rear sides of the bottom sidewall of the screen body (1) are provided with vibration components (3). The vibration components (3) include a rubber sleeve (301) bonded to the bottom sidewall of the screen body (1). The rubber sleeve (301) is provided with a cam (302) inside, and a wheel axle (302a) is installed on the axis of the cam (302). A linkage component (303) is installed on the outer end of the wheel axle (302a). The right end of the bottom sidewall of the screen body (1) is provided with an extension component (4). The extension component (4) includes an I-beam plate (401) fixed to the bottom sidewall of the screen body (1), and elastic element one (402) and elastic element two (403) are respectively provided on the upper and lower sides of the bottom of the I-beam plate (401).

2. The polyurethane screen for sticky, fine-grained raw coal according to claim 1, characterized in that, The screen groove (101) penetrates the front and rear side walls of the screen body (1). The four connection points of the side cover plate (2) are provided with fixing bolts (201), and the side cover plate (2) is connected to the outer wall of the screen groove (101) through the fixing bolts (201).

3. The polyurethane screen for sticky, fine-grained raw coal according to claim 1, characterized in that, Vibration grooves (102) are provided at both the front and rear ends of the bottom sidewall of the screen body (1). The rubber sleeve (301) is bonded to the vibration groove (102), and multiple cams (302) are provided at equal intervals inside the rubber sleeve (301).

4. The polyurethane screen for sticky, fine-grained raw coal according to claim 3, characterized in that, The cams (302) are evenly spaced and connected to the vibration groove (102) via rubber sleeves (301). The linkage (303) includes a grooved gear (303a) sleeved on the axle (302a) and the grooved gears (303a) are meshed and connected by a toothed belt (303b).

5. The polyurethane screen for sticky, fine-grained raw coal according to claim 4, characterized in that, The grooved gear (303a) located on the central axis of the screen body (1) has the largest diameter, and the diameters of the other grooved gears (303a) located on both sides of the central axis decrease sequentially to both sides.

6. The polyurethane screen for sticky, fine-grained raw coal according to claim 1, characterized in that, The bottom side wall of the screen body (1) is provided with an installation groove (103). The upper end of the I-beam plate (401) is connected to the installation groove (103) by an installation bolt (401a). The bottom upper and lower side walls of the I-beam plate (401) are respectively provided with plate hole one (401b) and plate hole two (401c).

7. The polyurethane screen for sticky, fine-grained raw coal according to claim 6, characterized in that, The first elastic element (402) includes a first spring (402b) fixed in the first plate hole (401b), and a sleeve plate (402a) is fixedly provided on the upper side wall of the first spring (402b). The sleeve plate (402a) is also slidably sleeved with the vertical side wall of the I-beam plate (401). The second elastic element (403) includes a second spring (403b) fixed in the second plate hole (401c), and a sliding plate (403a) is fixedly installed on the bottom side wall of the second spring (403b).

8. The polyurethane screen for sticky, fine-grained raw coal according to claim 1, characterized in that, The screen body (1) consists of two parts: a skeleton and an outer coating. The skeleton is woven from vulcanized steel wire rope (104), and the outer coating is composed of a polyurethane layer (105).

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