Pulverized coal sieve

Abstract

The utility model provides a pulverized coal sieve, which relates to the technical field of pulverized coal sieving, and comprises a sieve box main body, a chassis arranged at the bottom of the sieve box main body, a replacement door rotatably connected to the front of the sieve box main body, a sundry cleaning hole arranged on the back of the sieve box main body, a sieve frame slidably connected to the inner wall of the sieve box main body, and a sieve mesh fixed on the surface of the sieve frame. Threaded holes are formed in the top of the inner wall of the screen box body, fixing bolts are in threaded connection with the inner walls of the threaded holes, and the screen frame is fixed to the screen box body through the fixing bolts. The totally-closed structure is adopted, meanwhile, the replacement door facilitating replacement of the screen frame and the screen mesh and the impurity cleaning hole facilitating cleaning of impurities are arranged, pulverized coal flying is avoided, replacement of the screen mesh and cleaning of the impurities are facilitated, the screen frame is fixed through the fixing bolts at the top of the screen box body, installation is convenient, and the cost is low. The operation is simple, the maintenance efficiency and the operation effect of equipment are improved, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal powder screening, especially to a coal powder sieve. BACKGROUND

[0002] The coal powder sieve is suitable for coal powder screening of the blast furnace and the blast furnace coal injection system of the steel industry and the non-ferrous metal industry, has an important role in the blast furnace coal injection production, and the particle size and impurity content of the coal powder directly affect the combustion efficiency of the blast furnace and the stability of equipment operation, and usually comprises a sieve box, the bottom of the sieve box is provided with a fixing base, vibration motors are fixed on the two sides of the sieve box, the top of the sieve box is provided with a coal powder inlet, and the bottom of the sieve box is provided with a coal powder outlet.

[0003] In the prior art, in order to prevent coal dust pollution of the environment, the traditional screening technology usually adopts a fully enclosed structure, and the structure has the disadvantages of inconvenient replacement of the screen mesh and difficult impurity cleaning, thereby affecting the maintenance efficiency and operation effect of the equipment. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the shortcomings in the prior art and provides a coal powder sieve.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a coal powder sieve, comprising a sieve box main body, the bottom of the sieve box main body is provided with a chassis, the front of the sieve box main body is rotationally connected with a replacement door, the back of the sieve box main body is provided with an impurity cleaning hole, the inner wall of the sieve box main body is slidably connected with a sieve frame, the surface of the sieve frame is fixed with a screen mesh, the top of the inner wall of the sieve box main body is provided with a threaded hole, the inner wall of the threaded hole is threadedly connected with a fixing bolt, and the sieve frame is fixed with the sieve box main body through the fixing bolt.

[0006] Preferably, the inner wall of the sieve box main body is provided with trapezoidal sliding grooves on the two sides, the included angle between the trapezoidal sliding grooves and the ground is not less than 15 degrees, the two sides of the sieve frame are fixed with trapezoidal pieces, the surface of the trapezoidal piece is slidably connected with the inner wall of the trapezoidal sliding groove, a plurality of flat grooves are formed in the top of the trapezoidal piece, a fixing circular groove is formed in the surface of the flat groove, and the bottom end of the fixing bolt is attached to the inner wall of the fixing circular groove.

[0007] Preferably, the two sides of the trapezoidal piece are provided with arc grooves, the inner wall of the trapezoidal sliding groove is fixed with an elastic sheet, and the inner wall of the arc groove is nested with the surface of the elastic sheet.

[0008] Preferably, the end of the trapezoidal piece away from the replacement door is provided with a dust shoveling groove.

[0009] Preferably, the dust shoveling groove is provided with a separation groove on one side, and the end of the trapezoidal sliding groove away from the replacement door is provided with a dust discharging groove.

[0010] Preferably, the inner wall of the dust shoveling groove is provided with an inner inclined surface.

[0011] Preferably, guide slopes are provided on both sides of the inner wall of the flat groove.

[0012] Preferably, a double-strand spring is fixed to the bottom of the screen box body, and the bottom of the double-strand spring is fixed to the top of the base frame.

[0013] Beneficial effects

[0014] This utility model achieves a fully enclosed structure while providing a replacement door for easy replacement of the screen frame and screen mesh, as well as a debris cleaning hole for easy cleaning of debris. This not only avoids coal dust, but also facilitates the replacement of the screen mesh and the cleaning of debris. Furthermore, the screen frame is fixed by several fixing bolts on the top of the screen box body, making installation convenient and operation simple, improving the maintenance efficiency and operating effect of the equipment, and enhancing work efficiency.

[0015] This invention achieves stability of the screen frame during installation and equipment production by using a trapezoidal groove and trapezoidal components, preventing the screen frame from swaying left and right within the inner wall of the screen box body due to vibration, thus improving the stability of the screen frame.

[0016] This invention enables the inner wall of the arc groove to be nested with the surface of the spring piece, so that the vibration generated when the spring piece is nested into the inner wall of the arc groove can be fed back to the workers. It also provides temporary fixation for the screen frame and trapezoidal component before they are fixed with fixing bolts, preventing the trapezoidal component from shifting due to equipment vibration, thereby increasing the installation accuracy of the trapezoidal component. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a three-dimensional structural diagram of the sieve frame of this utility model;

[0019] Figure 3 This is a cross-sectional view of the trapezoidal component of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the fixing bolt of this utility model;

[0021] Figure 5 This is a sectional view of the flat groove of this utility model;

[0022] Figure 6 This is a cross-sectional view of the ash trough of this utility model;

[0023] Figure 7 This is a cross-sectional view of the spring clip of this utility model;

[0024] Figure 8 This is a cross-sectional view of the trapezoidal slide of this utility model.

[0025] Legend:

[0026] 1, sieve box main body; 101, chassis; 2, replacement door; 201, sieve frame; 202, sieve screen; 203, fixing bolt; 204, flat groove; 205, fixed circular groove; 3, trapezoidal sliding groove; 301, trapezoidal piece; 4, arc groove; 401, elastic sheet; 5, guide slope; 6, ash removal groove; 7, disengagement groove; 701, ash discharge groove; 8, inner slope; 9, double-leaf spring. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0028] The specific embodiments of the utility model are described below in combination with the drawings.

[0029] Reference Figures 1-8 A coal powder sieve, comprising a sieve box main body 1, the bottom of the sieve box main body 1 is provided with a chassis 101, the front of the sieve box main body 1 is rotatably connected with a replacement door 2, the back of the sieve box main body 1 is provided with a sundry cleaning hole, the inner wall of the sieve box main body 1 is slidably connected with a sieve frame 201, the surface of the sieve frame 201 is fixedly provided with a sieve screen 202, the top of the inner wall of the sieve box main body 1 is provided with a threaded hole, the inner wall of the threaded hole is threadedly connected with a fixing bolt 203, the sieve frame 201 is fixed with the sieve box main body 1 through the fixing bolt 203, when the staff needs to replace the sieve frame 201 and the sieve screen 202, the bolt nut of the replacement door 2 and the sieve box main body 1 is loosened, the replacement door 2 is rotated and opened, the inside of the sieve box main body 1 is opened, then the fixing bolt 203 is loosened, the sieve frame 201 and the inner wall of the sieve box main body 1 can slide, then the sieve frame 201 is pulled to make the sieve frame 201 and the sieve screen 202 separate from the sieve box main body 1, and another sieve frame 201 is put in for replacement, and the fixing bolt 203 is tightened to fix the sieve frame 201, so that the equipment can keep sealed during work, and the replacement work is more efficient.

[0030] The inner wall of the sieve box body 1 is provided with trapezoidal sliding grooves 3 on both sides, the included angle between the trapezoidal sliding grooves 3 and the ground is not less than 15 degrees, the sieve frame 201 is fixed with trapezoidal pieces 301 on both sides, the surface of the trapezoidal piece 301 is in sliding connection with the inner wall of the trapezoidal sliding groove 3, a plurality of flat grooves 204 are formed in the top of the trapezoidal piece 301, a fixed circular groove 205 is formed in the surface of the flat groove 204, and the bottom end of the fixing bolt 203 is in close contact with the inner wall of the fixed circular groove 205. When the staff puts the sieve frame 201 into the sieve box body 1, the trapezoidal pieces 301 on both sides of the sieve frame 201 are aligned with the trapezoidal sliding grooves 3 on the inner wall of the sieve box body 1 and are slid in, the cooperation of the trapezoidal sliding grooves 3 and the trapezoidal pieces 301 limits the possible left-right shaking of the sieve frame 201, prevents the sieve frame 201 from deviating on the inner wall of the sieve box body 1, and improves the stability of the sieve frame 201.

[0031] Arc grooves 4 are formed in the two sides of the trapezoidal piece 301, and elastic sheets 401 are fixed on the inner wall of the trapezoidal sliding groove 3. The inner wall of the arc groove 4 is nested with the surface of the elastic sheet 401. When the staff slides the trapezoidal piece 301 into the trapezoidal sliding groove 3, the trapezoidal piece 301 first extrudes the elastic sheet 401, so that the elastic sheet 401 accumulates elastic potential energy under pressure, and the elastic sheet 401 exerts a counterforce on the side surface of the trapezoidal piece 301, so that the pressure is reduced and the sliding speed is reduced. The collision force between the end of the trapezoidal piece 301 away from the replacement door 2 and the end of the trapezoidal sliding groove 3 away from the replacement door 2 is reduced, preventing damage to the trapezoidal piece 301 and the trapezoidal sliding groove 3. When the arc groove 4 reaches the elastic sheet 401, the elastic sheet 401 releases the elastic potential energy and is embedded in the arc groove 4, so that it can be temporarily fixed and stable under the condition that the equipment does not stop running, and it is convenient for the staff to fix it through the fixing bolt 203.

[0032] A dust shovel groove 6 is formed in the end of the trapezoidal piece 301 away from the replacement door 2. The dust shovel groove 6 has an acute edge, which shovels the dust in the trapezoidal sliding groove 3 into the dust shovel groove 6 when it contacts the dust, preventing the dust from accumulating in the trapezoidal sliding groove 3, reducing the friction between the trapezoidal sliding groove 3 and the trapezoidal piece 301, and increasing the service life of the trapezoidal sliding groove 3 and the trapezoidal piece 301.

[0033] A separation groove 7 is formed on one side of the dust shovel groove 6, and a dust discharge groove 701 is formed in the end of the trapezoidal sliding groove 3 away from the replacement door 2. The dust in the dust shovel groove 6 can leave the dust shovel groove 6 through the separation groove 7 and then leave the trapezoidal sliding groove 3 through the dust discharge groove 701 at the end of the trapezoidal sliding groove 3, which facilitates dust removal and facilitates staff cleaning.

[0034] An inner inclined surface 8 is arranged on the inner wall of the dust shovel groove 6, which provides a smooth moving route for the dust, facilitating its exit from the dust shovel groove 6 and preventing the occurrence of dead points that make it difficult to discharge dust.

[0035] Guide inclined surfaces 5 are arranged on both sides of the inner wall of the flat groove 204, which guide the fixing bolt 203 into the fixed circular groove 205 when there is a certain deviation between the position of the bottom end of the fixing bolt 203 and the position of the fixed circular groove 205.

[0036] The double spring 9 is fixed at the bottom of the sieve box body 1, and the bottom of the double spring 9 is fixed to the top of the bottom frame 101, so that the influence of vibration on the bottom frame 101 is reduced, and the noise caused by the collision of the bottom frame 101 with the ground after the vibration is transmitted to the bottom frame 101 is prevented, thereby reducing the influence of noise.

[0037] The working principle of the utility model is: the coal powder sieve makes the sieve frame 201 and the sieve net 202 vibrate by two vibration motors, and forces the material to make continuous linear motion on the sieve net 202. The coal powder is rapidly loosened and sieved, and the wood chips and other sundries are left on the upper part of the sieve net 202. When the staff needs to replace the sieve frame 201 and the sieve net 202, the bolt nut of the replacement door 2 and the sieve box body 1 is loosened, the replacement door 2 is rotated and opened, the inside of the sieve box body 1 is opened, then the fixing bolt 203 is loosened, the sieve frame 201 can slide on the inner wall of the sieve box body 1, then the sieve frame 201 is pulled to make the sieve frame 201 and the sieve net 202 leave the sieve box body 1, and another sieve frame 201 is put in for replacement, and the sieve frame 201 is fixed by the fixing bolt 203 again. The material of the sieve net 202 is manganese wire, and the aperture of the sieve net 202 is determined by calculation. When the staff puts the sieve frame 201 into the sieve box body 1, the trapezoidal pieces 301 on the two sides of the sieve frame 201 are aligned with the trapezoidal sliding grooves 3 on the inner wall of the sieve box body 1 and are slid in, the trapezoidal sliding grooves 3 and the trapezoidal pieces 301 are matched to limit the possible left and right shaking of the sieve frame 201, and the sieve frame 201 is prevented from deviating on the inner wall of the sieve box body 1. When the staff slides the trapezoidal pieces 301 into the trapezoidal sliding grooves 3, the trapezoidal pieces 301 first press the elastic pieces 401, the elastic pieces 401 accumulate elastic potential energy under pressure, and the elastic pieces 401 generate a reaction force on the side of the trapezoidal pieces 301, so that the pressure is reduced and the sliding speed is reduced. The collision force between the end of the trapezoidal piece 301 far from the replacement door 2 and the end of the trapezoidal sliding groove 3 far from the replacement door 2 is reduced, and the damage of the trapezoidal piece 301 and the trapezoidal sliding groove 3 is prevented. When the arc groove 4 reaches the elastic piece 401, the elastic piece 401 releases the elastic potential energy and is embedded in the arc groove 4, so that the sieve frame 201 can be temporarily fixed and stable under the condition that the equipment does not stop. The dust shovel groove 6 shovels the dust in the trapezoidal sliding groove 3 into the dust shovel groove 6 through the sharp edge of the dust shovel groove 6 when the dust shovel groove 6 contacts the dust in the trapezoidal sliding groove 3. The dust in the dust shovel groove 6 can be separated from the dust shovel groove 6 through the separation groove 7 and then be discharged from the trapezoidal sliding groove 3 through the dust discharge groove 701 at the end of the trapezoidal sliding groove 3. The inner inclined surface 8 provides a smooth moving route for the dust, and the guide inclined surface 5 guides the fixing bolt 203 into the fixed circular groove 205.

[0038] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them. Moreover, first feature "on", "above" and "on" second feature include that first feature is directly above and obliquely above second feature, or only indicate that first feature horizontal height is higher than second feature. First feature "under", "below" and "under" second feature include that first feature is directly below and obliquely below second feature, or only indicate that first feature horizontal height is less than second feature.

[0039] The basic principle, main features and advantages of the utility model are shown and described above. The skilled in the art should understand that the utility model is not limited by the above examples, the above examples and the description in the specification are only preferred examples of the utility model, and are not used to limit the utility model, various changes and improvements of the utility model are possible without departing from the spirit and scope of the utility model, and all fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A coal powder screen, comprising a screen box body (1), wherein a base frame (101) is provided at the bottom of the screen box body (1), characterized in that: The screen box body (1) has a replacement door (2) rotatably connected to the front. The screen box body (1) has a debris cleaning hole on the back. The screen frame (201) is slidably connected to the inner wall of the screen box body (1). The screen mesh (202) is fixed on the surface of the screen frame (201). The top of the inner wall of the screen box body (1) has a threaded hole. The inner wall of the threaded hole is threaded with a fixing bolt (203). The screen frame (201) is fixed to the screen box body (1) by the fixing bolt (203).

2. The coal powder sieve according to claim 1, characterized in that: The inner walls of the screen box body (1) are provided with trapezoidal grooves (3) on both sides. The angle between the trapezoidal grooves (3) and the ground is not less than 15 degrees. Trapezoidal parts (301) are fixed on both sides of the screen frame (201). The surface of the trapezoidal parts (301) is slidably connected to the inner wall of the trapezoidal grooves (3). Several flat grooves (204) are provided on the top of the trapezoidal parts (301). Fixed circular grooves (205) are provided on the surface of the flat grooves (204). The bottom end of the fixing bolts (203) is attached to the inner wall of the fixed circular grooves (205).

3. A coal powder sieve according to claim 2, characterized in that: The trapezoidal component (301) has arc grooves (4) on both sides, and a spring piece (401) is fixed on the inner wall of the trapezoidal groove (3). The inner wall of the arc groove (4) is nested with the surface of the spring piece (401).

4. A coal powder sieve according to claim 2, characterized in that: The trapezoidal component (301) has a shovel groove (6) at the end away from the replacement door (2).

5. A coal powder sieve according to claim 4, characterized in that: The ash trough (6) has a release groove (7) on one side, and the trapezoidal slide (3) has an ash discharge groove (701) at the end away from the replacement door (2).

6. A coal powder sieve according to claim 4, characterized in that: The inner wall of the ash trough (6) is provided with an inner inclined surface (8).

7. A coal powder sieve according to claim 2, characterized in that: The inner walls of the flat groove (204) are provided with guide slopes (5) on both sides.

8. A coal powder sieve according to claim 1, characterized in that: The bottom of the sieve box body (1) is fixed with a double spring (9), and the bottom of the double spring (9) is fixed to the top of the base frame (101).

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