Sand screening equipment for dry-mixed mortar production

Abstract

The utility model relates to the technical field of sand material screening, and discloses sand material screening equipment for dry-mixed mortar production, which comprises a main shell, a screening box is arranged in the main shell, uniformly distributed screening holes are formed in the lower surface of the screening box, a guide rod is fixed on the rear side of the inner part of the screening box, and the guide rod is connected with the screening box. And an auxiliary block slides on the outer diameter of the guide rod. According to the utility model, the interior of the screening box after screening is cleaned, so that sand or dust can be prevented from being accumulated in the screening box or accumulated, and the accumulated sand and dust can possibly cause premature abrasion or blockage of equipment parts, so that the screening efficiency is influenced, and even equipment faults are caused. Regular cleaning can keep the normal operation state of the equipment, and the service life of the equipment is prolonged. And in the cleaning process, the soft cleaning brush can effectively remove adhesive substances and particulate matters on the inner wall of the screening box and around the screening holes, and the substances generally influence the screening efficiency and the service life of the screening holes.

Description

Technical Field

[0001] The utility model relates to the technical field of sand material screening, in particular to sand material screening equipment for dry-mix mortar production. Background Art

[0002] Dry-mix mortar is a pre-mixed, dry powdered building material typically composed of cement, lime, gypsum, or other binding materials mixed with sand, fillers, and additives in a specific proportion. Sand screening is a crucial step in the dry-mix mortar production process. Proper sand screening ensures consistent mortar quality and reliable construction.

[0003] A search revealed an existing Chinese patent publication number of CN208712151U, which provides a dry-mix mortar sand screening device comprising a housing, the upper end of which is provided with a stepped stop section, the inner diameter of which is larger than the inner diameter of the lower end of the housing, a bearing ring provided on the inner side surface of the stepped stop section, the outer ring of which is interference-fitted with the inner side surface of the stepped stop section, and a screen drum provided within the stepped stop section, the outer wall of which is interference-fitted with the inner ring of the bearing drum. This patent prevents dust from escaping through the screening process within a confined space; simultaneously, the screen drum rotates automatically so that the sand can be evenly distributed on the screen, preventing it from accumulating in one place; screening through two screens improves screening quality and also increases the sand discharge speed. An air duct is provided at the bottom of the housing to partially remove dust from the sand.

[0004] Although the above patent can rotate the screen drum by itself so that the sand can be evenly distributed on the screen to avoid its accumulation in a certain place; screening through two screens improves the screening quality and also increases the sand discharge speed, and an air duct is provided at the bottom of the box to partially remove dust in the sand, but the above-mentioned dry-mixed mortar sand screening equipment still has the following problems: it does not have a self-cleaning function, and during the sand screening process, if the inside of the screening equipment is not clean, the screened product may be mixed with accumulated dust or impurities, and the accumulated sand and dust may cause premature wear or blockage of equipment components, thereby affecting the screening efficiency and even causing equipment failure.

[0005] In view of the above problems, a sand screening device for dry-mix mortar production is proposed. Utility Model Content

[0006] The purpose of the utility model is to provide a sand screening device for dry-mix mortar production, which solves the problem in the background technology that the interior of the screening equipment is not clean, and the sand and dust accumulated inside may cause premature wear or blockage of the equipment components, thereby affecting the screening efficiency and even causing equipment failure.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sand screening device for dry-mixed mortar production, comprising a main shell, a screening box is provided inside the main shell, and the lower surface of the screening box is provided with evenly distributed sieve holes, a guide rod is fixed at the rear side of the interior of the screening box, an auxiliary block is slidably provided on the outer diameter of the guide rod, a screw rod is rotated at the front side of the interior of the screening box, and the screw rod is arranged parallel to the guide rod, the outer diameter of the screw rod is threadedly connected to a moving block, an arc-shaped connecting strip is fixed to the bottom of the moving block and the auxiliary block, and evenly distributed soft cleaning brushes are installed on the side of the arc-shaped connecting strip adjacent to the inner wall of the screening box, and the soft cleaning brush contacts the inner wall of the screening box, a motor is fixed on the right side of the screening box near the screw rod, and the output end of the motor passes through the screening box and is fixedly connected to the screw rod; a dust suction mechanism is provided on the top of the screening box.

[0008] As a further description of the above technical solution: sliding rods are fixed to the interior of the main shell near the front and rear sides, and the two sliding rods are arranged in parallel, connecting slides are fixed to the tops of the left and right sides of the screening box, and the position of the connecting slides is higher than the motor, and the two connecting slides slide on the two sliding rods.

[0009] As a further description of the above technical solution: the outer diameter of the two sliding rods is provided with a spring, and the spring is located between the left connecting slide and the main shell.

[0010] As a further description of the above technical solution: a cylinder is fixed in the middle of the right side of the main shell, the output end of the cylinder passes through the main shell and is fixed with a rubber push plate, and the rubber push plate is located below the connecting slide on the right side.

[0011] As a further description of the above technical solution: an inclined discharge hopper is passed through and fixed at the bottom of the front side of the main shell.

[0012] As a further description of the above technical solution: the dust collection mechanism includes a square pipe installed at the top frame of the screening box, and a dust collector installed at the rear side of the main shell.

[0013] As a further description of the above technical solution: evenly distributed inner dust suction heads are passed through and fixed on all four sides of the inner side of the square pipe, and the ends of the inner dust suction heads are inclined and facing the inside of the screening box, evenly distributed outer dust suction heads are passed through and fixed on both sides of the outer side of the square pipe, and a connecting head is passed through and fixed on the top rear side of the square pipe, and the dust suction end of the vacuum cleaner is connected to the connecting head through a dust suction connecting pipe.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The utility model provides a sand screening device for dry-mixed mortar production. By cleaning the inside of the screening box after screening, it can prevent sand or dust from piling up or accumulating in the screening box. The accumulated sand and dust may cause premature wear or clogging of equipment components, thereby affecting the screening efficiency and even causing equipment failure. Regular cleaning can maintain the normal operation of the equipment and extend the service life of the equipment. In addition, during the cleaning process, the soft cleaning brush can effectively remove adhesions and particulate matter around the inner wall of the screening box and the sieve holes, which usually affect the screening efficiency and the service life of the sieve holes. Therefore, keeping the sieve holes unobstructed can ensure the continuity and efficiency of the screening process and avoid production stoppages or quality problems due to blockage. Therefore, this design can improve the reliability and operating efficiency of the equipment.

[0016] 2. The utility model provides a sand screening equipment for dry-mixed mortar production, which effectively reduces the dust generated during the sand screening process through the design of the dust suction mechanism, and the internal dust suction head mainly focuses on processing the dust generated in the screening box during the screening process, while the external dust suction head specifically processes the dust generated after the sand falls into the main shell, ensuring that the dust generated during the entire screening process is effectively controlled and cleaned, without affecting the working environment and the health and safety of the staff, and significantly improving the cleanliness of the working environment and the safety of operation. At the same time, precise dust management also helps to protect the equipment from dust, extend the service life of the equipment, reduce maintenance and cleaning costs, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 It is a right side structural schematic diagram of the present utility model;

[0019] Figure 3 This is a schematic diagram of the front cross-sectional structure of the present utility model;

[0020] Figure 4 This is a structural diagram of the screening box and the slide bar in the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the square pipe and the inner and outer dust collector heads in the utility model;

[0022] Figure 6 It is a right side structural schematic diagram of the screening box in the present utility model.

[0023] In the figure: 1. Main housing; 2. Slide rod; 3. Connecting slide plate; 4. Spring; 5. Cylinder; 6. Rubber push plate; 7. Screening box; 71. Sieve hole; 72. Square pipe; 73. Inner dust suction head; 74. Outer dust suction head; 75. Vacuum cleaner; 76. Dust suction connecting pipe; 77. Connecting head; 8. Guide rod; 81. Auxiliary block; 82. Screw rod; 83. Moving block; 84. Arc-shaped connecting strip; 85. Soft cleaning brush; 86. Motor; 9. Tilt discharge hopper. DETAILED DESCRIPTION

[0024] The following will refer to the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0026] Reference Figure 1 and Figure 6 The utility model relates to a sand screening device for dry-mixed mortar production, comprising a main shell 1, a screening box 7 is provided inside the main shell 1, and the lower surface of the screening box 7 is provided with evenly distributed sieve holes 71, a guide rod 8 is fixed at the rear side of the interior of the screening box 7, and an auxiliary block 81 is slidably provided on the outer diameter of the guide rod 8, and a screw rod 82 is rotated at the front side of the interior of the screening box 7, and the screw rod 82 is arranged parallel to the guide rod 8, and the outer diameter of the screw rod 82 is threadedly connected to a moving block 83, and an arc-shaped connecting strip 84 is fixed to the bottom of the moving block 83 and the auxiliary block 81, and the arc-shaped connecting strip 84 is installed with evenly distributed soft cleaning brushes 85 on the side adjacent to the inner wall of the screening box 7, and the soft cleaning brush 85 contacts the inner wall of the screening box 7, and a motor 86 is fixed on the right side of the screening box 7 near the screw rod 82, and the output end of the motor 86 passes through the screening box 7 and is fixedly connected to the screw rod 82.

[0027] When the screening box 7 has finished screening the sand material, the motor drives the screw to rotate, thereby driving the moving block 83 to move on the screw, and the movement of the moving block 83 drives the auxiliary block 81 and the arc-shaped connecting strip 84, so that the arc-shaped connecting strip 84 drives the soft cleaning brush 85 to move. Since the soft cleaning brush 85 is in contact with the inner wall of the screening box 7, the soft cleaning brush 85 will generate a certain friction force during the movement. The friction effect helps to remove the adhesion on the inner wall of the screening box 7 and the particulate matter in the sieve hole 71, and remove or reduce the fine particles or dust adhering to the vicinity of the sieve hole 71, so that the sieve hole 71 can be kept unobstructed, and the sand material can be prevented from being blocked when being screened next time.

[0028] Reference Figure 1 、 Figure 3 and Figure 4 , sliding bars 2 are fixed inside the main shell 1 near the front and rear sides, and the two sliding bars 2 are arranged in parallel, connecting slides 3 are fixed at the top of the left and right sides of the screening box 7, and the position of the connecting slides 3 is higher than the motor 86, and the two connecting slides 3 slide on the two sliding bars 2, and the outer diameter of the two slide bars 2 is provided with a spring 4, and the spring 4 is located between the left connecting slide 3 and the main shell 1, and a cylinder 5 is fixed in the middle of the right side of the main shell 1, and the output end of the cylinder 5 passes through the main shell 1 and is fixed with a rubber push plate 6, and the rubber push plate 6 is located below the right connecting slide 3, and an inclined discharge hopper 9 is passed through and fixed at the bottom of the front side of the main shell 1.

[0029] When the sand material needs to be screened, the sand material to be screened is first poured into the screening box 7. At the same time, the output end of the cylinder pushes the rubber push plate 6 to the left. Since the rubber push plate 6 is located below the right connecting slide 3, when the rubber plate 6 reaches a certain distance, it pushes the screening box 7, causing the entire screening box 7 to drive the connecting slide 3 to move. Since the connecting slide 3 is also slidably connected to the slide bar 2, the connecting slide 3 slides to the left under the guidance of the slide bar 2. During the movement, due to the presence of the spring 4, the connecting slide 3 moves to the left, which compresses the spring 4. When the spring 4 is completely compressed, the cylinder 5 quickly drives the rubber push plate 6 to retract and shrink to its original state. When the cylinder quickly contracts, since the spring 4 is no longer under stress, the spring 4 quickly rebounds and pushes the screening box 7 to the right, completing a movement cycle. Therefore, the sand material inside the screening box 7 will shake during the movement, allowing the sand material inside to quickly pass through the sieve hole 71 for screening. After being screened by the sieve holes 71 , the sand material falls into the interior of the main shell 1 and is finally discharged through the inclined discharge hopper 9 .

[0030] Reference Figure 1 、 Figure 2 and Figure 5 A dust suction mechanism is provided on the top of the screening box 7. The dust suction mechanism includes a square pipe 72 installed on the top frame of the screening box 7 and a dust collector 75 installed on the rear side of the main shell 1. The inner side of the square pipe 72 is penetrated and fixed with evenly distributed inner dust suction heads 73, and the ends of the inner dust suction heads 73 are inclined and facing the inside of the screening box 7. The outer left and right sides of the square pipe 72 are penetrated and fixed with evenly distributed outer dust suction heads 74. A connecting head 77 is penetrated and fixed on the top rear side of the square pipe 72. The dust suction end of the dust collector 75 is connected to the connecting head 77 through a dust suction connecting pipe 76.

[0031] During the screening process of the sand material in the screening box 7, the movement of the screening box 7 will cause the sand material inside to generate a large amount of fine dust. Therefore, during the screening process, the dust collector 75 quickly absorbs the generated dust particles into the square pipe 72 through the arrangement of the inner and outer dust suction heads (the dust suction connecting pipe 76 is made of soft material and has sufficient length to ensure the normal movement of the screening box 7). After that, the dust particles are guided to the connector 77 and then discharged into the dust collector 75 through the dust suction connecting pipe 76. Since the inner dust suction head 73 is mainly used to remove the dust generated in the screening box 7 during the screening process, it prevents the dust from affecting the working environment and the staff. Since the screened sand material falls into the interior of the main shell 1, it will also generate dust after falling in. Therefore, the outer dust suction head 74 is specifically used to deal with the dust generated after the sand material falls. Therefore, the dust suction mechanism can effectively reduce the dust generated during the sand material screening process, improve the cleanliness of the working environment and the safety of operation, and is also beneficial to the protection of the equipment and the extension of its service life.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sand screening device for dry-mix mortar production, comprising a main housing (1), characterized in that: A screening box (7) is provided inside the main housing (1), and the lower surface of the screening box (7) is provided with evenly distributed sieve holes (71). A guide rod (8) is fixed at the rear side of the inside of the screening box (7), and an auxiliary block (81) is slidably provided on the outer diameter of the guide rod (8). A screw rod (82) is rotated at the front side of the inside of the screening box (7), and the screw rod (82) is arranged parallel to the guide rod (8). The outer diameter of the screw rod (82) is connected to a moving block (83) through a thread, and the moving block (83) is connected to the outer diameter of the screw rod (82). ) and the bottom of the auxiliary block (81) are fixed with an arc-shaped connecting strip (84), and evenly distributed soft cleaning brushes (85) are installed on the side adjacent to the inner wall of the screening box (7), and the soft cleaning brushes (85) are in contact with the inner wall of the screening box (7). A motor (86) is fixed on the right side of the screening box (7) near the screw rod (82), and the output end of the motor (86) passes through the screening box (7) and is fixedly connected to the screw rod (82); a dust collection mechanism is provided on the top of the screening box (7).

2. The sand screening device for dry-mix mortar production according to claim 1, characterized in that: Slide bars (2) are fixed near the front and rear sides of the main housing (1), and the two slide bars (2) are arranged in parallel. Connecting slide plates (3) are fixed at the tops of the left and right sides of the screening box (7), and the position of the connecting slide plates (3) is higher than the motor (86). The two connecting slide plates (3) slide on the two slide bars (2).

3. The sand screening device for dry-mix mortar production according to claim 2, characterized in that: The outer diameters of the two slide bars (2) are both provided with springs (4), and the springs (4) are located between the left connecting slide plate (3) and the main housing (1).

4. The sand screening device for dry-mix mortar production according to claim 2, characterized in that: A cylinder (5) is fixed in the middle of the right side of the main housing (1), and the output end of the cylinder (5) passes through the main housing (1) and is fixed with a rubber push plate (6), and the rubber push plate (6) is located below the right side connecting slide plate (3).

5. The sand screening device for dry-mix mortar production according to claim 2, characterized in that: An inclined discharge hopper (9) is passed through and fixed at the front bottom of the main housing (1).

6. The sand screening equipment for dry-mix mortar production according to claim 1, characterized in that: The dust collection mechanism comprises a square pipe (72) installed at the top frame of the screening box (7), and a dust collector (75) installed at the rear side of the main shell (1).

7. The sand screening device for dry-mix mortar production according to claim 6, characterized in that: Evenly distributed inner dust suction heads (73) are passed through and fixed around the inner side of the square pipe (72), and the ends of the inner dust suction heads (73) are inclined and face the inside of the screening box (7). Evenly distributed outer dust suction heads (74) are passed through and fixed on both the left and right sides of the outer side of the square pipe (72). A connector (77) is passed through and fixed on the top rear side of the square pipe (72), and the dust suction end of the dust collector (75) is connected to the connector (77) through a dust suction connecting pipe (76).

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