Coal ash screening device

Abstract

The utility model relates to a coal ash screening device which comprises a shell, a driving mechanism and at least two screens, a containing cavity is formed in the shell, and the at least two screens are slidably arranged in the containing cavity at intervals in the vertical direction and divide the containing cavity into a first containing cavity and a second containing cavity which are arranged in the vertical direction; an inlet, a first outlet and a second outlet are formed in the shell, the inlet and the first outlet are communicated with the first containing cavity, and the second outlet is communicated with the second containing cavity. Each screen comprises a mounting frame and a screen body, the screen body is mounted in the mounting frame, and the driving mechanism is arranged between the two adjacent screens and connected with the mounting frames of the two adjacent screens so as to drive the two adjacent screens to reciprocate in the vertical direction. Due to the fact that the driving mechanism is arranged between the two screens, the two screens can be driven by the same driving mechanism to do reciprocating motion in the vertical direction, and the space occupied by the driving mechanism in the vertical direction and the horizontal direction is further reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of ore sorting, and in particular, to a coal ash screening device. Background Art

[0002] Coal ash is the powder formed after the combustion of coal-fired boilers. Its main uses include urban landfill, coal ash dam treatment, road and railway laying, and drainage engineering, etc. At the same time, coal ash has functions such as adsorption, purification, and catalysis. Therefore, in the laboratory, coal ash can be used to replace many drugs for various experiments, and in daily life, it can be used for life-saving, purifying sewage, as fertilizer and improving acidic soil in production, and treating industrial wastewater in environmental protection, etc.

[0003] In the related art, usually according to different uses, the coal ash particles are sorted by size before use. For example, in the patent document with the authorization publication number CN216026147U, an ore sorting device for mine mining engineering is disclosed. This device completes multiple screenings of the ore by setting different screening mechanisms. However, different screening mechanisms are respectively equipped with separate driving mechanisms, which occupy a large space both in the horizontal direction and the vertical direction, and are not conducive to the miniaturization of the device. Summary of the Utility Model

[0004] The purpose of the present disclosure is to provide a coal ash screening device to solve the above technical problems.

[0005] To achieve the above purpose, the present disclosure provides a coal ash screening device, including a housing, a driving mechanism, and at least two screen meshes. An accommodation cavity is formed in the housing. At least two of the screen meshes are slidably arranged at intervals in the accommodation cavity in the up-down direction, and divide the accommodation cavity into a first accommodation cavity and a second accommodation cavity arranged in the up-down direction. An inlet, a first outlet, and a second outlet are formed on the housing. The inlet and the first outlet are communicated with the first accommodation cavity, and the second outlet is communicated with the second accommodation cavity.

[0006] The screen mesh includes an installation frame and a screen mesh body. The screen mesh body is installed in the installation frame. The driving mechanism is arranged between two adjacent screen meshes and is respectively connected to the installation frames of the two adjacent screen meshes to drive the two adjacent screen meshes to move reciprocally in the up-down direction.

[0007] Optionally, the installation frame includes a frame and a middle frame. Two ends of the middle frame are respectively connected to two sides of the frame. The driving mechanism is arranged between two adjacent middle frames.

[0008] Optionally, the number of the driving mechanisms is multiple, and the multiple driving mechanisms are arranged at intervals along the extending direction of the middle frame.

[0009] Optionally, the driving mechanism is a two-way hydraulic cylinder, and the ends of the two piston rods of the two-way hydraulic cylinder away from the cylinder body are respectively connected to two adjacent middle frames.

[0010] Optionally, the coal ash screening device further includes a limiting structure, the limiting structure includes a slider, a chute extending in the up and down direction is formed on the inner wall of the housing, the slider is slidably arranged in the chute, and the slider is connected to the mounting frame.

[0011] Optionally, the number of the sliders is at least two, the number of the chutes is two, and the two sliders are respectively arranged in the corresponding chutes.

[0012] The limiting structure further includes an elastic member, the elastic member is arranged in the chute located on the lower side of the screen mesh, one end of the elastic member is connected to the side of the slider away from the screen mesh, and the other end of the elastic member is connected to the inner wall of the chute to provide an elastic restoring force for the screen mesh.

[0013] Optionally, the multiple screen meshes include a first screen mesh and a second screen mesh. The first screen mesh and a part of the inner wall of the housing enclose to form the first accommodation cavity, and the second screen mesh and a part of the inner wall of the housing enclose to form the second accommodation cavity. The aperture size of the first screen mesh is larger than that of the second screen mesh.

[0014] Optionally, the coal ash screening device further includes a base, rolling wheels and a supporting mechanism. The housing is arranged on the upper side of the base, and the rolling wheels are arranged on the lower side of the base.

[0015] The supporting mechanism includes a first supporting rod and a second supporting rod. The first supporting rod is telescopically arranged on the base, and the first supporting rod has a supporting end for abutting against the ground.

[0016] The lower end of the second supporting rod is connected to the base, and the upper end of the second supporting rod is connected to the housing. The housing is arranged obliquely so that the inlet is located above the first outlet and the second outlet.

[0017] Optionally, an anti-slip pad is covered on the surface of the supporting end close to the ground.

[0018] Optionally, the supporting mechanism further includes a hydraulic cylinder. The cylinder body of the hydraulic cylinder is arranged on the base, and one end of the first supporting rod is arranged in the cylinder body of the hydraulic cylinder, and the other end of the first supporting rod is the supporting end.

[0019] Through the above technical solution, coal ash can be screened by two different sieve meshes, so that coal ash with different particle diameters is discharged from different outlets of the accommodating cavity. Moreover, since the driving mechanism is arranged between the two sieve meshes, the two sieve meshes can be driven by the same driving mechanism to reciprocate in the up and down direction, further reducing the space occupied by the driving mechanism in the up and down direction and the horizontal direction, and improving the miniaturization degree of the coal ash screening device.

[0020] Other features and advantages of the present disclosure will be described in detail in the following specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0022] Figure 1 is a three-dimensional view of the internal structure of the housing of the coal ash screening device provided by an embodiment of the present disclosure;

[0023] Figure 2 is Figure 1 an enlarged view of part A in

[0024] Figure 3 is a three-dimensional view of the driving mechanism of the coal ash screening device provided by an embodiment of the present disclosure, wherein the middle frame of the installation frame is shown;

[0025] Figure 4 is a three-dimensional view of the coal ash screening device provided by an embodiment of the present disclosure.

[0026] DESCRIPTION OF THE REFERENCE NUMERALS

[0027] 100 - Coal ash screening device; 1 - Housing; 11 - Inlet; 12 - First outlet; 13 - Second outlet; 2 - Driving mechanism; 3 - Sieve mesh; 31 - Installation frame; 311 - Frame; 312 - Middle frame; 32 - First sieve mesh; 33 - Second sieve mesh; 34 - Sieve mesh body; 4 - Limiting structure; 41 - Slide block; 42 - Slide groove; 43 - Elastic member; 44 - First limiting block; 45 - Second limiting block; 5 - Base; 6 - Rolling wheel; 7 - Support mechanism; 71 - First support rod; 711 - Support end; 712 - Anti-slip pad; 72 - Second support rod; 73 - Hydraulic cylinder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following will describe in detail the specific implementation of the present disclosure with reference to the drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0029] In this disclosure, unless otherwise stated, the orientation terms such as "upper" and "lower" are generally defined based on the drawing direction of the corresponding drawings. It is only for the convenience of describing this disclosure and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, as well as a specific orientation structure and operation. Therefore, it should not be construed as a limitation to this disclosure. "Inner" and "outer" refer to the inside and outside of the contour of the corresponding component. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0030] In the description of this disclosure, it should also be noted that unless otherwise clearly specified and limited, the terms "arranged", "connected", "linked", "installed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0031] As Figures 1 to 4 shown, this disclosure provides a coal ash screening device 100, which includes a housing 1, a driving mechanism 2, and at least two screens 3. An accommodation cavity is formed in the housing 1. At least two screens 3 are slidably arranged at intervals in the accommodation cavity in the up and down direction, and divide the accommodation cavity into a first accommodation cavity and a second accommodation cavity arranged in the up and down direction. An inlet 11, a first outlet 12, and a second outlet 13 are formed on the housing 1. The inlet 11 and the first outlet 12 are communicated with the first accommodation cavity, and the second outlet 13 is communicated with the second accommodation cavity.

[0032] The screen 3 includes a mounting frame 31 and a screen body 34. The screen body 34 is installed in the mounting frame 31. The driving mechanism 2 is arranged between two adjacent screens 3 and is respectively connected to the mounting frames 31 of the two adjacent screens 3 to drive the two adjacent screens 3 to move reciprocally in the up and down direction.

[0033] During the process of screening coal ash by the coal ash screening device 100 of this disclosure, the coal ash to be screened can be poured into the first accommodation cavity through the inlet 11, and the coal ash falls on the upper screen 3 under the action of gravity. As the screen 3 moves reciprocally in the up and down direction, the coal ash with a particle diameter smaller than the aperture of the screen 3 falls, and after being screened by the lower screen 3, it is discharged from the accommodation cavity through the second outlet 13. The coal ash with a particle diameter larger than the aperture of the upper screen 3 is discharged through the first outlet 12.

[0034] Through the above technical solution, the coal ash can be screened by two different sieve meshes 3, so that the coal ash with different particle diameters is discharged from the accommodating cavity through different outlets. Moreover, since the driving mechanism 2 is arranged between the two sieve meshes 3, the two sieve meshes 3 can be driven by the same driving mechanism 2 to move reciprocally in the up and down direction, further reducing the space occupied by the driving mechanism 2 in the up and down direction and the horizontal direction, and improving the miniaturization degree of the coal ash screening device 100.

[0035] Optionally, in order to increase the connection strength, as Figure 1 shown, the mounting frame 31 includes a frame border 311 and a middle frame 312. Two ends of the middle frame 312 are respectively connected to two sides of the frame border 311, and the driving mechanism 2 is arranged between two adjacent middle frames 312.

[0036] The driving mechanism 2 is arranged between the two middle frames 312. The driving end of the driving mechanism 2 drives the middle frame 312 to move in the up and down direction, which can make the middle frame 312 drive the frame border 311 to move in the up and down direction together, so as to drive the sieve mesh body 34 to move together and filter the coal ash. Moreover, since the middle frame 312 is arranged in the middle of the mounting frame 31, the space in the middle of the sieve mesh body 34 can be used to arrange the driving mechanism 2, thereby further reducing the space occupied by the coal ash screening device 100 in the horizontal direction.

[0037] Optionally, as Figure 3 shown, the number of the driving mechanisms 2 is multiple, and the multiple driving mechanisms 2 are arranged at intervals along the extending direction of the middle frame 312. The multiple driving mechanisms 2 are arranged at intervals along the extending direction of the middle frame 312, which can provide uniform driving force and supporting force at different positions in the extending direction of the middle frame 312, thereby preventing the middle frame 312 from being unevenly stressed during the movement, which may cause the sieve meshes 3 to collide with each other and shift, and ensuring the normal operation of the coal ash screening device 100.

[0038] The present disclosure does not limit the specific structure of the driving mechanism 2. In an embodiment provided by the present disclosure, as Figure 3 shown, the driving mechanism 2 is a double-acting hydraulic cylinder. One ends of two piston rods of the double-acting hydraulic cylinder far away from the cylinder body are respectively connected to two adjacent middle frames 312. The double-acting hydraulic cylinder can simultaneously provide driving force for the sieve meshes 3 on both sides, so that the sieve meshes 3 on both sides can move in the up and down direction. Moreover, the structure is simple and convenient for installation and maintenance.

[0039] In another embodiment provided by the present disclosure, the driving mechanism 2 may include a motor, a cam and a reset member. The large end of the cam is drivingly connected to the driving end of the motor, and the small end of the cam can contact with the middle frames 312 on both sides respectively as the cam rotates, so as to push the sieve mesh 3 to move away from the cam, and the reset member is used to provide an elastic force for the sieve mesh 3 to approach the cam.

[0040] To limit the movement range of the screen 3, optionally, as Figure 2 shown, the coal ash screening device 100 further includes a limiting structure 4. The limiting structure 4 includes a slider 41. A chute 42 extending in the up and down direction is formed on the inner wall of the housing 1. The slider 41 is slidably disposed in the chute 42, and the slider 41 is connected to the mounting frame 31. Since the slider 41 is connected to the mounting frame 31 and the slider 41 slides in the chute 42 extending in the up and down direction, the mounting frame 31 also moves along the extending direction of the chute 42 following the slider 41, thereby realizing the limitation of the movement range of the screen 3. In this way, it is possible to prevent the screen 3 from shifting and rotating during the movement, ensuring the normal operation of the coal ash screening device 100.

[0041] Optionally, the cross-section of the chute 42 can be I-shaped, and the cross-sectional shape of the slider 41 can be matched with the cross-sectional shape of the chute 42, and can be an I-shaped slider 41. The I-shaped chute 42 and the slider 41 can cooperate with each other to prevent the slider 41 from disengaging from the chute 42, further ensuring that the screen 3 will not break away from the limitation of the chute 42 during the movement.

[0042] Optionally, as Figure 1 shown, the limiting structure 4 further includes a first limiting block 44 and a second limiting block 45. Both the first limiting block 44 and the second limiting block 45 are disposed on the inner wall of the housing 1, and the first limiting block 44 and the second limiting block 45 are disposed between two adjacent screens 3. The first limiting block 44 is separably abutted against the surface of the mounting frame 31 of the screen 3 located on the upper side, and the second limiting block 45 is separably abutted against the surface of the mounting frame 31 of the screen 3 located on the lower side. The first limiting block 44 and the second limiting block 45 can limit the distance between two adjacent screens 3, ensuring that the mounting frames 31 of the screens 3 will not collide due to being too close during the movement in the up and down direction. At the same time, it can also provide support for the screen 3 to prevent the screen 3 from deforming or even breaking due to excessive force.

[0043] To ensure the movement space of the screen 3, optionally, as Figure 2 shown, the number of the sliders 41 is at least two, and the number of the chutes 42 is two. The two sliders 41 are respectively disposed in the corresponding chutes 42. The limiting structure 4 further includes an elastic member 43. The elastic member 43 is disposed in the chute 42 located under the screen 3. One end of the elastic member 43 is connected to the side of the slider 41 away from the screen 3, and the other end of the elastic member 43 is connected to the inner wall of the chute 42 to provide an elastic restoring force for the screen 3. Since the coal ash screening device 100 has two screens 3 and is spaced apart in the up and down direction, respectively providing corresponding chutes 42 and sliders 41 for each screen 3 can better guide the movement of the screen 3.

[0044] The provision of the elastic member 43 can, on the one hand, provide support for the lower screen 3 by the upper screen 3, so that the lower screen 3 will not always be located at the bottom of the accommodating cavity under the action of gravity, ensuring the normal movement of the screen 3; on the other hand, since the elastic member 43 can be compressed or stretched, it can provide sufficient movement space for the screen 3 while providing support, ensuring the normal operation of the coal ash screening device 100.

[0045] Optionally, as Figure 1 shown, the multiple screens 3 include a first screen 32 and a second screen 33. The first screen 32 and a part of the inner wall of the housing 1 enclose a first accommodating cavity, and the second screen 33 and a part of the inner wall of the housing 1 enclose a second accommodating cavity. The screen hole size of the first screen 32 is larger than that of the second screen 33. Two adjacent screens 3 and a part of the inner wall of the housing 1 enclose a third accommodating cavity, and a third outlet is also formed on the housing 1, and the third outlet communicates with the third accommodating cavity.

[0046] After the coal ash to be screened is screened by the first screen 32 with a larger screen hole size, the coal ash with larger particles that do not pass through the screen holes of the first screen 32 can be discharged from the first accommodating cavity through the first outlet 12, and the coal ash screened by the first screen 32 enters the third accommodating cavity. After the coal ash in the third accommodating cavity is screened by the second screen 33, the coal ash that does not pass through the screen holes of the second screen 33 can be discharged from the third accommodating cavity through the third outlet, and the coal ash screened by the second screen 33 enters the second accommodating cavity and is discharged from the second accommodating cavity through the second outlet 13. By providing the first screen 32 and the second screen 33 with different screen hole sizes, the coal ash can be screened into three types according to the particle size through two filtrations to meet different usage requirements.

[0047] To improve the stability of the coal ash screening device 100 during operation, optionally, as Figure 4 shown, the coal ash screening device 100 further includes a base 5, rolling wheels 6 and a support mechanism 7. The housing 1 is arranged on the upper side of the base 5, and the rolling wheels 6 are arranged on the lower side of the base 5.

[0048] The support mechanism 7 includes a first support rod 71 and a second support rod 72. The first support rod 71 is telescopically arranged on the base 5, and the first support rod 71 has a support end 711 for abutting against the ground. The lower end of the second support rod 72 is connected to the base 5, and the upper end of the second support rod 72 is connected to the housing 1. The housing 1 is inclined so that the inlet 11 is located above the first outlet 12 and the second outlet 13.

[0049] The housing 1 is arranged on the upper side of the base 5, and rolling wheels 6 are arranged on the lower side of the base 5, which facilitates moving the housing 1 to a position close to the coal ash accumulation for screening work, improving the flexibility of the coal ash screening device 100. The first support rod 71 arranged on the base 5 is in a retracted state and does not contact the ground when the housing 1 moves through the rolling wheels 6; after the housing 1 moves to the working position, the first support rod 71 can extend until the support end 711 of the first support rod 71 abuts against the ground, thereby providing support for the base 5, reducing the shaking during the working process of the coal ash screening device 100, and improving the stability.

[0050] The second support rod 72 can lift one end of the housing 1, making the housing 1 in an inclined state, and further making the inlet 11 located above the first outlet 12 and the second outlet 13. The coal ash entering the accommodation cavity through the inlet 11 can always move along the direction from the inlet 11 to the first outlet 12 or the second outlet 13 under the action of gravity during the working process of the coal ash screening device 100, so that the coal ash during the screening process will not accumulate on the screen 3, thereby improving the screening efficiency.

[0051] Optionally, as Figure 4 shown, an anti-slip pad 712 is covered on the surface of the support end 711 close to the ground. Since the screen 3 can move in the up and down direction under the drive of the drive mechanism 2, the housing 1 will shake during the working process of the coal ash screening device 100. Covering the anti-slip pad 712 on the surface of the support end 711 close to the ground makes the friction between the support end 711 and the ground greater when the first support rod 71 shakes under the influence of the housing 1, preventing the support end 711 from slipping and ensuring the support effect of the first support rod 71.

[0052] The present disclosure does not limit the specific structure of the support mechanism 7. As Figure 4 shown, in an embodiment provided by the present disclosure, the support mechanism 7 further includes a hydraulic cylinder 73. The cylinder body of the hydraulic cylinder 73 is arranged on the base 5, one end of the first support rod 71 is arranged in the cylinder body of the hydraulic cylinder 73, and the other end of the first support rod 71 is the support end 711. The hydraulic cylinder 73 can drive the first support rod 71 to expand and contract in different states. At the same time, when the support end 711 of the first support rod 71 abuts against the ground, the hydraulic cylinder 73 can also provide a stable support force to improve the stability when the coal ash screening device 100 is working.

[0053] In another embodiment provided by the present disclosure, the support mechanism 7 may further include a motor and a nut. The nut is in transmission connection with the motor. An external thread is formed on the outer surface of one end of the first support rod 71. The nut is sleeved on one end of the first support rod 71, forming a lead screw-nut pair with the first support rod 71. The first support rod 71 can move axially under the drive of the nut.

[0054] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0055] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination manners.

[0056] Furthermore, any combination can be made among the various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A coal ash screening device, characterized in that, It includes a housing, a driving mechanism and at least two sieves. An accommodation cavity is formed in the housing. At least two of the sieves are slidably arranged at intervals in the accommodation cavity in the up and down direction, and divide the accommodation cavity into a first accommodation cavity and a second accommodation cavity arranged in the up and down direction. An inlet, a first outlet and a second outlet are formed on the housing. The inlet and the first outlet are communicated with the first accommodation cavity, and the second outlet is communicated with the second accommodation cavity. The sieve includes a mounting frame and a sieve body. The sieve body is mounted in the mounting frame. The driving mechanism is arranged between two adjacent sieves and is respectively connected to the mounting frames of the two adjacent sieves to drive the two adjacent sieves to move reciprocally in the up and down direction.

2. The coal ash screening device according to claim 1, characterized in that, The mounting frame includes a frame and a middle frame. Two ends of the middle frame are respectively connected to two sides of the frame. The driving mechanism is arranged between two adjacent middle frames.

3. The coal ash screening device according to claim 2, characterized in that, The number of the driving mechanisms is multiple, and the multiple driving mechanisms are arranged at intervals along the extending direction of the middle frame.

4. The coal ash screening device according to claim 2, wherein The driving mechanism is a double-acting hydraulic cylinder. One ends of two piston rods of the double-acting hydraulic cylinder far away from the cylinder body are respectively connected to two adjacent middle frames.

5. The coal ash screening device according to claim 1, characterized in that, The coal ash screening device further includes a limiting structure. The limiting structure includes a slider. A chute extending in the up and down direction is formed on the inner wall of the housing. The slider is slidably arranged in the chute, and the slider is connected to the mounting frame.

6. The coal ash screening device according to claim 5, characterized in that, The number of the sliders is at least two, and the number of the chutes is two. The two sliders are respectively arranged in the corresponding chutes. The limiting structure further includes an elastic member. The elastic member is arranged in the chute located below the sieve. One end of the elastic member is connected to the side of the slider far away from the sieve, and the other end of the elastic member is connected to the inner wall of the chute to provide an elastic restoring force for the sieve.

7. The coal ash screening device according to any one of claims 1-6, characterized in that The multiple sieves include a first sieve and a second sieve. The first sieve and a part of the inner wall of the housing enclose to form the first accommodation cavity, and the second sieve and a part of the inner wall of the housing enclose to form the second accommodation cavity. The sieve hole size of the first sieve is larger than the sieve hole size of the second sieve.

8. The coal ash screening device according to any one of claims 1-6, characterized in that, The coal ash screening device further includes a base, rolling wheels and a supporting mechanism. The housing is arranged on the upper side of the base, and the rolling wheels are arranged on the lower side of the base. The supporting mechanism includes a first support rod and a second support rod. The first support rod is telescopically arranged on the base. The first support rod has a supporting end, and the supporting end is used for abutting against the ground in contact. The lower end of the second support rod is connected to the base, and the upper end of the second support rod is connected to the housing. The housing is arranged obliquely so that the inlet is located above the first outlet and the second outlet.

9. The coal ash screening device according to claim 8, characterized in that, An anti-slip pad is covered on the surface of the supporting end close to the ground.

10. The coal ash screening device according to claim 8, characterized in that, The supporting mechanism further includes a hydraulic cylinder. The cylinder body of the hydraulic cylinder is arranged on the base. One end of the first support rod is arranged in the cylinder body of the hydraulic cylinder, and the other end of the first support rod is the supporting end.

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