Dust suppression sealing device of roller screen

Abstract

The utility model discloses a dust suppression sealing device of a roller screen, and belongs to the technical field of roller screen equipment. The utility model solves the problem that dust overflows at the junction of the screen shaft and the shell due to the poor sealing effect of the sealing seat and asbestos packing structure adopted by the existing roller screen. The dust suppression device comprises a first-stage material blocking mechanism, a screen piece shaft, third-stage dust suppression blades and screen pieces, the screen piece shaft is connected with the multiple screen pieces, the two ends of the screen piece shaft are respectively provided with an end rotary piece, a second-stage dust prevention gap is formed between the first-stage material blocking mechanism and the end rotary pieces, and the third-stage dust suppression blades are evenly distributed on the end rotary pieces. The screen piece shaft is rotationally connected with the equipment shell, and the first-stage material blocking mechanism is installed on the inner side of the equipment shell. According to the dust suppression sealing device of the roller screen, a three-stage sealing dust suppression mode is adopted, the problem that material blocks enter the shaft end to cause shaft clamping is solved, and compared with an existing roller screen, the dust suppression sealing device of the roller screen has a better sealing effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of roller screen equipment, and particularly relates to a dust suppression and sealing device for a roller screen. Background Art

[0002] Since the incoming materials of the roller screen are mainly bulk or granular materials, a large amount of dust is generated during the screening process. The existing shaft end seal usually adopts a structure of a sealing seat plus asbestos packing, which has a simple structure and poor sealing effect. Dust overflows at the intersection of the screen shaft and the housing, which will not only pollute the environment but also endanger the health of on-site workers.

[0003] When the existing roller screen is running, the material blocks on the roller screen are also likely to enter the two side shaft ends, resulting in the problem of shaft jamming and the phenomenon of screen shaft tripping, which affects the normal operation of the roller screen.

[0004] Therefore, this application proposes a dust suppression and sealing device for a roller screen with dust suppression and dust prevention functions and improving the operation efficiency of the roller screen to solve the above problems. Summary of the Utility Model

[0005] The research and development purpose of the utility model is to solve the problem that the sealing seat plus asbestos packing structure adopted by the existing roller screen has a poor sealing effect, resulting in dust overflow at the intersection of the screen shaft and the housing. The following gives a brief overview of the utility model to provide a basic understanding of certain aspects of the utility model. It should be understood that this overview is not an exhaustive overview of the utility model. It is not intended to identify the key or important parts of the utility model, nor is it intended to limit the scope of the utility model.

[0006] The technical solution of the utility model:

[0007] A dust suppression and sealing device for a roller screen includes a first-stage material blocking mechanism, a screen shaft, third-stage dust suppression blades, and screens. Multiple screens are connected to the screen shaft. End rotary vanes are respectively arranged at both ends of the screen shaft. There is a second-stage dust prevention gap between the first-stage material blocking mechanism and the end rotary vanes. Multiple third-stage dust suppression blades are evenly distributed on the end rotary vanes. The screen shaft is rotatably connected to the equipment housing, and the first-stage material blocking mechanism is installed inside the equipment housing.

[0008] Further, the first-stage material blocking mechanism is connected to the equipment housing by screws, and nuts are connected in cooperation with the screws. The nuts are arranged outside the equipment housing.

[0009] Further, the screws are cross recessed countersunk head screws.

[0010] Further, the number of the third-stage dust suppression blades is four, and the four third-stage dust suppression blades are circumferentially and evenly distributed on the end rotary vanes.

[0011] Furthermore, the three - stage dust suppression blade includes a blade surface and a blade root. The width of the blade surface is greater than that of the blade root, and the blade root is connected to the end rotating blade by welding.

[0012] Furthermore, the three - stage dust suppression blade is a curved blade.

[0013] The utility model has the following beneficial effects:

[0014] 1. For the dust suppression and sealing device of a roller screen of the utility model, a three - stage sealing and dust suppression method is adopted. First, a primary material blocking mechanism installed inside the equipment housing blocks materials from entering the intersection of the screen shaft and the housing, preventing material blocks from entering the shaft end and causing shaft jamming and the phenomenon of the screen shaft skipping, thus ensuring the normal operation of the roller screen. Then, a secondary dust - proof gap designed between the end rotating blade and the primary material blocking mechanism blocks fine - grained materials and dust from entering the intersection of the screen shaft and the housing. Finally, by installing three - stage dust suppression blades on the end rotating blade, when the screen shaft rotates to drive the end rotating blade to rotate, the three - stage dust suppression blades rotate at the same speed as the end rotating blade. Under the action of the three - stage dust suppression blades, a micro - negative pressure is generated between the end rotating blade and the housing, inhibiting the entry of pulverized coal.

[0015] 2. The three - stage dust suppression blades of the dust suppression and sealing device of a roller screen of the utility model are curved blades. The windward surface of the curved - structured blades arcs up, reducing resistance and improving the work - doing ability. Every time the screen shaft rotates one circle, the end rotating blades on both sides of the screen shaft rotate coaxially and at the same speed, purging the intersection of the screen shaft and the equipment housing once. A micro - negative pressure is formed in this space, preventing dust from entering and realizing no dust overflow between the screen shaft and the housing shaft hole. Moreover, the width of the blade surface part is greater than that of the blade root, and the wide blade surface is used to increase the sweeping area and improve the air volume. Description of the Drawings

[0016] Figure 1 is the front view of a dust suppression and sealing device of a roller screen;

[0017] Figure 2 is the schematic diagram of a dust suppression and sealing device of a roller screen;

[0018] Figure 3 is the front view of the three - stage dust suppression blade;

[0019] Figure 4 is the top view of the three - stage dust suppression blade.

[0020] In the figure: 1 - primary material blocking mechanism, 2 - screen shaft, 3 - spacer, 4 - secondary dust - proof gap, 5 - three - stage dust suppression blade, 6 - screen, 7 - screw, 8 - nut, 9 - equipment housing, 51 - blade surface, 52 - blade root, 61 - end rotating blade. Detailed Implementation Modes

[0021] To make the objectives, technical solutions and advantages of the present utility model clearer and more explicit, the present utility model will be described below through specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present utility model. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0022] The connections mentioned in the present utility model are divided into fixed connections and detachable connections. The fixed connections (i.e., non-detachable connections) include, but are not limited to, conventional fixed connection methods such as hemming connections, rivet connections, bonding connections, and welding connections. The detachable connections include, but are not limited to, conventional disassembly methods such as screw connections, snap connections, pin connections, and hinge connections. When the specific connection method is not clearly defined, it is defaulted that at least one connection method can always be found among the existing connection methods to achieve this function, and those skilled in the art can select according to their needs. For example: welding connection is selected for the fixed connection, and hinge connection is selected for the detachable connection.

[0023] In the present utility model, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] Example 1, in combination with Figures 1 - 4 To illustrate this embodiment, a dust suppression and sealing device for a roller screen in this embodiment includes a primary material blocking mechanism 1, a screen shaft 2, tertiary dust suppression vanes 5, and screens 6. Multiple screens 6 are connected to the screen shaft 2. End rotors 61 are respectively arranged at both ends of the screen shaft 2. There is a secondary dust prevention gap 4 between the primary material blocking mechanism 1 and the end rotors 61. Multiple tertiary dust suppression vanes 5 are evenly distributed on the end rotors 61. The screen shaft 2 is rotatably connected to the equipment housing 9, and the primary material blocking mechanism 1 is installed inside the equipment housing 9.

[0025] The primary material blocking mechanism 1 is installed inside the equipment housing 9. The primary material blocking mechanism 1 is an enclosed guard plate. A spacer 3 is arranged between the primary material blocking mechanism 1 and the equipment housing 9. The thickness of the spacer 3 is the same as the distance between the end rotor 61 and the inner wall of the equipment housing 9. There is a secondary dust prevention gap 4 between the primary material blocking mechanism 1 and the end rotors 61 on the screen shaft 2. The width of the secondary dust prevention gap 4 is set to be minimized on the premise that the screens 6 on the screen shaft 2 can rotate normally. Fine particles and dust are effectively blocked from entering the intersection of the screen shaft 2 and the equipment housing 9 through the secondary dust prevention gap 4;

[0026] The first-level material blocking mechanism 1 is connected to the guard plate 1 by screws 7. The screws 7 are inserted from the side of the first-level material blocking mechanism 1. After passing through the first-level material blocking mechanism 1 and the equipment housing 9, the tail ends of the screws 7 are arranged outside the equipment housing 9. Nuts 8 are screwed onto the screws 7. Through the cooperation connection of the nuts 8 and the screws 7, the equipment housing 9 is connected and fastened to the first-level material blocking mechanism 1. The screws 7 are countersunk cross-recessed screws, making the end faces of the screws 7 flush with the end faces of the first-level material blocking mechanism 1 to avoid damage or deformation of the screws 7 caused by the impact of the material blocks.

[0027] The blade roots 52 of the third-level dust suppression blades 5 are welded to the end rotating vanes 61. The blade roots 52 and the blade surfaces 51 are integrally machined. The width of the blade surfaces 51 is greater than that of the blade roots 52, increasing the sweeping area of the third-level dust suppression blades 5 and improving the air volume. At least four third-level dust suppression blades 5 are circumferentially distributed on the end rotating vanes 61. When the sieve shaft 2 drives the sieve 6 to rotate, the end rotating vanes 61 drive the third-level dust suppression blades 5 to rotate, and the intersection of the sieve shaft 2 and the equipment housing 9 is purged once. A micro-negative pressure is formed in this space, preventing dust from entering and realizing dust-free overflow at the shaft hole of the sieve shaft 2 and the equipment housing 9.

[0028] The third-level dust suppression blades 5 are curved blades. With the design of curved blades, the windward surface is arched, reducing resistance and improving the work capacity.

[0029] This embodiment is only an exemplary illustration of the present application and does not limit its protection scope. Those skilled in the art can also make partial changes to it. As long as it does not exceed the spirit of the present application, it is within the protection scope of the present application.

Claims

1. A dust suppression and sealing device for a roller screen, characterized in that: It includes a primary material blocking mechanism (1), a sieve shaft (2), tertiary dust suppression vanes (5) and sieve plates (6). Multiple sieve plates (6) are connected to the sieve shaft (2). End rotary vanes (61) are respectively arranged at both ends of the sieve shaft (2). There is a secondary dust prevention gap (4) between the primary material blocking mechanism (1) and the end rotary vanes (61). Multiple tertiary dust suppression vanes (5) are evenly distributed on the end rotary vanes (61). The sieve shaft (2) is rotatably connected to the equipment housing (9), and the primary material blocking mechanism (1) is installed inside the equipment housing (9).

2. The dust suppression and sealing device of a roller screen according to claim 1, characterized in that: The primary material blocking mechanism (1) is connected to the equipment housing (9) by screws (7), and nuts (8) are cooperatively connected to the screws (7). The nuts (8) are arranged on the outer side of the equipment housing (9).

3. The dust suppression and sealing device of a roller screen according to claim 2, characterized in that: The screw (7) is a cross recessed countersunk head screw.

4. The dust suppression and sealing device for a roller screen according to claim 1, characterized in that: The number of the tertiary dust suppression vanes (5) is four, and the four tertiary dust suppression vanes (5) are evenly distributed in a circle on the end rotary vanes (61).

5. The dust suppression and sealing device of a roller screen according to claim 4, characterized in that: The tertiary dust suppression vane (5) includes a blade surface (51) and a blade root (52). The width of the blade surface (51) is greater than that of the blade root (52). The blade root (52) is connected to the end rotary vane (61) by welding.

6. The dust suppression and sealing device for a roller screen according to claim 4 or 5, characterized in that: The tertiary dust suppression vane (5) is a curved vane.

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