A screening device for ready-mixed mortar

Abstract

The utility model discloses a kind of screening devices of premixed mortar, including support, box body is installed on the upper end of support by spring assembly, vibration motor is installed at the lower end of box body by mounting seat, detachably connected on the upper end of box body is box cover, and screen is set in the box body;The box cover is provided with feed inlet, and the box body is provided with discharge port;Support frame is provided in the box body, the screen is placed on support frame, crimping frame is provided on the screen, and the crimping frame, screen and support frame are connected by bolt as a whole;The end of support frame close to discharge port is hinged with box body, and the other end is provided with height adjusting mechanism.The utility model has the advantages that: by design adjustable screen inclination angle structure, the adaptability and screening efficiency of premixed mortar screening device can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the technical field of mortar processing equipment, and in particular to a screening device for premixed mortar. Background Technology

[0002] A screening device for premixed mortar is a key piece of equipment used for particle size classification of premixed mortar raw materials. It typically consists of an inlet, screen, vibrating motor, frame, and outlet. During operation, the vibration force generated by the vibrating motor causes the screen to vibrate regularly, causing the premixed mortar raw materials entering the device to jump and advance across the screen surface. Fine particles that meet the particle size requirements pass through the screen and fall, while particles that are too large are trapped and discharged from the end of the screen. This device effectively removes large particle impurities or lumps from the mortar, ensuring the uniformity of the mortar and the quality of construction. It is widely used in dry-mixed mortar production lines and mortar processing at construction sites.

[0003] However, during the screening process of mortar raw materials, different batches of raw materials have different particle size distributions and moisture contents, resulting in varying flowability. Currently, most screening devices use screens with fixed inclination angles, which cannot be flexibly adjusted according to the actual characteristics of the materials. When processing materials with high moisture content or fine particle size, the material flows too slowly on the screen surface, easily causing blockages or insufficient screening; while when processing dry, free-flowing materials, the material flow rate is too fast, potentially leading to insufficient screening time and poor separation. Therefore, screens with fixed inclination angles are difficult to adapt to varying raw material conditions, resulting in unsatisfactory overall screening efficiency and separation accuracy, affecting the quality stability of subsequent mortar products. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a screening device for premixed mortar.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A screening device for premixed mortar includes a support frame, a box mounted on the upper end of the support frame via a spring assembly, a vibrating motor mounted on the lower end of the box via a mounting base, a box cover detachably connected to the upper end of the box, and a screen disposed inside the box; the box cover is provided with a feed inlet, and the box is provided with a discharge outlet; a support frame is provided inside the box, the screen is placed on the support frame, and a pressing frame is provided on the screen; the pressing frame, the screen, and the support frame are connected as a whole by bolts; one end of the support frame near the discharge outlet is hinged to the box, and the other end is provided with a height adjustment mechanism.

[0007] As a preferred embodiment of this utility model, the height adjustment mechanism includes a base with a waist-shaped groove and fixed to the lower end of a support frame, a round rod passing through the waist-shaped groove and movable along the groove, a support seat fixed to the round rod, an internally threaded sleeve fixed to the lower end of the support seat, a screw threaded to the internally threaded sleeve, a rotating shaft fixed to the lower end of the screw, a worm gear fixed to the rotating shaft, a worm meshing with the worm gear, and a cover covering the worm gear and worm and fixed to a housing. The rotating shaft passes through the housing and is rotatably connected to the cover and the housing. The worm is rotatably connected to the cover, and one end of the worm extends out of the cover.

[0008] As a preferred technical solution of this utility model, a guide section is provided at one end of the worm gear extending out of the cover, a locking sleeve that can move along the guide section is fitted on the guide section, a threaded section is provided at the end of the guide section, a compression sleeve is screwed on the threaded section, and an operating section is provided at the end of the threaded section.

[0009] As a preferred technical solution of this utility model, the end face of the locking sleeve adjacent to the cover has a plurality of limiting grooves in an annular array, and the cover is provided with limiting protrusions that cooperate with the limiting grooves; the locking sleeve is hinged to the compression sleeve.

[0010] As a preferred technical solution of this utility model, the support frame includes a frame body, a plurality of support bars spaced apart on the frame body, a stop on the two long sides of the frame body, and a stop on the side of the frame body located at the feed inlet.

[0011] As a preferred embodiment of this utility model, the upper end of the frame is provided with a positioning protrusion, and the screen and the pressing frame are both provided with positioning holes that are adapted to the positioning protrusion.

[0012] As a preferred embodiment of this utility model, a telescopic dust cover is fitted onto the internal threaded sleeve and the screw.

[0013] As a preferred embodiment of this utility model, the lid and the body are connected by a snap fastener.

[0014] The above technical solution has the following advantages:

[0015] This invention, through the design of an adjustable screen tilt angle, effectively improves the adaptability and screening efficiency of premixed mortar screening equipment. Based on the differences in particle size distribution and moisture content of different batches of raw materials, operators can flexibly adjust the screen tilt angle: when the raw material has a high moisture content and poor flowability, the tilt angle can be appropriately reduced to extend the material's residence time on the screen and ensure thorough screening; when the raw material is dry and has good flowability, the tilt angle can be appropriately increased to accelerate material flow and improve processing capacity. This adjustment function effectively avoids the problem of decreased screening efficiency due to insufficient screening or material blockage, significantly improves the separation accuracy and equipment operational stability under different working conditions, thereby ensuring the consistency of mortar product quality and enhancing the adaptability of the screening equipment to varying raw materials. Attached Figure Description

[0016] Figure 1 This is a front view of one embodiment of the present utility model;

[0017] Figure 2 for Figure 1 Enlarged view of section A;

[0018] Figure 3 for Figure 1 The left view;

[0019] Figure 4 for Figure 1 Top view;

[0020] Figure 5 for Figure 1 A three-dimensional image;

[0021] Figure 6 for Figure 1 3D exploded view;

[0022] Figure 7 for Figure 6 Enlarged view of section B;

[0023] Figure 8 for Figure 6 Another perspective of the 3D exploded view;

[0024] Figure 9 for Figure 8 Enlarged view of section C;

[0025] In the picture:

[0026] 1-Bracket, 2-Spring assembly, 3-Box body, 4-Mounting base, 5-Vibration motor, 6-Box cover, 7-Screen, 8-Inlet, 9-Outlet, 10-Support frame, 11-Crimping frame, 12-Bolt, 13-Height adjustment mechanism, 14-Snap fastener;

[0027] 101-Frame, 102-Support bar, 103-Side guard, 104-Positioning protrusion, 105-Positioning hole;

[0028] 131-Waist-shaped groove, 132-Base, 133-Round rod, 134-Support seat, 135-Internal threaded sleeve, 136-Screw, 137-Rotating shaft, 138-Worm gear, 139-Worm, 140-Cover, 141-Guide section, 142-Locking sleeve, 143-Threaded section, 144-Extrusion sleeve, 145-Operating section, 146-Limiting groove, 147-Limiting protrusion. Detailed Implementation

[0029] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0030] Example 1

[0031] As attached Figure 1-9 As shown, a screening device for premixed mortar includes a support 1, a box 3 mounted on the upper end of the support 1 via a spring assembly 2, a vibrating motor 5 mounted on the lower end of the box 3 via a mounting base 4, a box cover 6 detachably connected to the upper end of the box 3, and a screen 7 disposed inside the box 3. The box cover 6 has a feed inlet 8, and the box 3 has a discharge outlet 9. A support frame 10 is disposed inside the box 3, the screen 7 is placed on the support frame 10, and a pressing frame 11 is disposed on the screen 7. The pressing frame 11, the screen 7, and the support frame 10 are connected as a whole by bolts 12. One end of the support frame 10 near the discharge outlet 9 is hinged to the box 3, and the other end is provided with a height adjustment mechanism 13. This invention is hinged to the box 3 via a pivot; obviously, bearings and other components can be added as needed.

[0032] The screen 7 assembly, consisting of the pressing frame 11, the screen mesh 7, and the support frame 10, achieves adjustable tilt angle through a hinge at one end and a height adjustment mechanism 13 at the other. Operators can manually or automatically adjust the tilt angle of the screen mesh 7 according to the material characteristics. This structure gives the screening device good adaptability, enabling optimization of the screen surface angle for mortar raw materials with different particle sizes and moisture contents, thereby improving screening efficiency and separation accuracy, and avoiding problems such as insufficient screening or material accumulation caused by a fixed tilt angle.

[0033] As a preferred embodiment, the height adjustment mechanism 13 includes a base 132 with a waist-shaped groove 131 and fixed to the lower end of the support frame 10, a round rod 133 passing through the waist-shaped groove 131 and movable along the waist-shaped groove 131, a support seat 134 fixed to the round rod 133, an internal threaded sleeve 135 fixed to the lower end of the support seat 134, a screw 136 threadedly connected to the internal threaded sleeve 135, a rotating shaft 137 fixed to the lower end of the screw 136, a worm gear 138 fixed to the rotating shaft 137, a worm 139 meshing with the worm gear 138, and a cover 140 covering the worm gear 138 and the worm 139 and fixed to the housing 3. The rotating shaft 137 passes through the housing 3 and is rotatably connected to the cover 140 and the housing 3. The worm 139 is rotatably connected to the cover 140, and one end of the worm 139 extends out of the cover 140. In operation, rotating the worm gear 139 drives the worm wheel 138 to rotate, which in turn drives the screw 136 to rise and fall, thus moving the support base 134 up and down. Since the round rod 133 can slide in the waist-shaped groove 131, horizontal displacement compensation is allowed when the support end changes height. This transmission structure has the advantages of strong self-locking and smooth operation, ensuring that the screen 7 can stably maintain the set angle after adjustment, avoiding angle deviation during vibration, and improving the reliability and safety of equipment operation.

[0034] As a preferred technical solution in this embodiment, the end of the worm gear 139 extending out of the cover 140 is provided with a guide section 141. A locking sleeve 142 that can move along the guide section 141 is fitted on the guide section 141. In this embodiment, the locking sleeve 142 is a regular hexahedron guide section 141, but obviously, a keyway structure or the like can also be used for guidance. A threaded section 143 is provided at the end of the guide section 141, and a compression sleeve 144 is screwed onto the threaded section 143. An operating section 145 is provided at the end of the threaded section 143. In this embodiment, the operating section 145 is a regular hexahedron to facilitate the use of tools or handwheels. Obviously, an operating handle can also be further provided on the operating section 145. Obviously, in order to further improve the locking ability of the compression sleeve 144, the compression sleeve 144 can be a locking nut or a double nut structure. After the height adjustment is completed, the rotating compression sleeve 144 pushes the locking sleeve 142 to move along the guide section 141. The compression cover abuts against the cover body 140 to form a friction self-locking mechanism, which makes the contact surface rough and achieves axial positioning of the worm gear 139, forming a double locking mechanism. This design not only facilitates manual operation, but also effectively prevents the worm gear 139 from loosening due to vibration during equipment operation, ensuring the long-term stability of the height adjustment mechanism 13 and extending the service life of the equipment.

[0035] In one preferred embodiment, the locking sleeve 142 has a plurality of limiting grooves 146 arranged in a ring on the end face adjacent to the cover 140, and the cover 140 is provided with limiting protrusions 147 that cooperate with the limiting grooves 146. The locking sleeve 142 is hinged to the compression sleeve 144. When the compression sleeve 144 rotates in both directions, it can drive the locking sleeve 142 to reciprocate. The cooperation between the limiting grooves 146 and the limiting protrusions 147 restricts the circumferential rotation of the locking sleeve 142, ensuring that it can only move axially, thereby accurately transmitting the thrust of the compression sleeve 144. This structure improves the reliability and repeatability of the locking action, avoids locking failure, and further enhances the fixing effect after angle adjustment.

[0036] As a preferred embodiment, the support frame 10 includes a frame body 101, multiple support bars 102 spaced apart on the frame body 101, two long sides of the frame body 101, and a retaining edge 103 located on the side of the frame body 101 near the feed inlet 8. The support bars 102 are evenly distributed to provide stable support for the screen 7 and prevent it from deforming or collapsing during vibration; the retaining edge 103 is designed to effectively prevent material from overflowing from the side or the feed end.

[0037] As a preferred technical solution in this embodiment, a positioning protrusion 104 is provided at the upper end of the frame 101, and positioning holes 105 adapted to the positioning protrusion 104 are provided on both the screen 7 and the pressing frame 11. The cooperation between the positioning protrusion 104 and the positioning hole 105 enables the screen 7 and the pressing frame 11 to be installed quickly and accurately, ensuring assembly consistency, avoiding the impact of installation deviation on the tension of the screen 7 and the screening effect, and improving the equipment maintenance efficiency and ease of use. The telescopic dust cover can deform synchronously with the extension and retraction of the screw 136, effectively isolating dust and moisture from entering the threaded pair, preventing the screw 136 from jamming or corroding due to the intrusion of mortar particles or moisture, and significantly improving the durability and maintenance cycle of the adjustment mechanism.

[0038] As a preferred technical solution in this embodiment, a telescopic dust cover (not shown in the figure) is fitted on the internal threaded sleeve 135 and the screw 136.

[0039] As a preferred technical solution in this embodiment, the lid 6 and the body 3 are connected by a snap fastener 14. The snap fastener 14 connection facilitates the quick opening and closing of the lid 6, which is beneficial for daily cleaning, screen replacement 7, and equipment maintenance, improving operational efficiency, reducing maintenance time costs, and is suitable for scenarios involving frequent screen replacement 7 or multiple batches of production.

[0040] The workflow is as follows:

[0041] Based on the particle size distribution and moisture content characteristics of the mortar raw material to be screened, the operator adjusts the tilt angle of the screen 7 by rotating the worm gear 139. The rotation of the worm gear 139 drives the worm wheel 138, which in turn drives the screw 136 to rise and fall, causing the support seat 134 to move up and down. The round rod 133 slides along the waist groove 131 to compensate for horizontal displacement when the height of the support frame 10 changes. After the required angle adjustment is completed, the operator rotates the extrusion sleeve 144, pushing the locking sleeve 142 to move along the guide section 141 and press against the cover 140, forming a double locking mechanism to ensure the stability of the screen 7 angle. Then the material enters the screen 7 from the feed port 8 on the box cover 6. Under the action of the vibrating motor 5, the screen 7 generates regular vibration, causing the material to jump forward on the screen surface. Fine particles that meet the particle size requirements pass through the screen 7 and fall out from the corresponding outlet, while particles that are too large are intercepted by the screen 7 and discharged from the corresponding outlet. After the screening operation is completed, the box cover 6 can be quickly opened by loosening the buckle 14, which facilitates routine cleaning or maintenance work such as replacing the screen 7.

[0042] In the description of the above embodiments, for the sake of brevity and clarity, some components and their specific structural details that are not directly related to the core innovations of this embodiment have been omitted. These omitted parts all fall within the scope of existing technology, and those skilled in the art can fully implement the design and manufacture of these parts based on their professional knowledge and existing technical materials. Therefore, they will not be described in detail here.

[0043] The embodiments of this invention have been described in detail above with reference to the accompanying drawings, but these embodiments are not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of these embodiments, and these variations still fall within the protection scope of these embodiments.

Claims

1. A screening device for premixed mortar, comprising a support (1), a housing (3) mounted on the upper end of the support (1) via a spring assembly (2), a vibrating motor (5) mounted on the lower end of the housing (3) via a mounting base (4), a housing cover (6) detachably connected to the upper end of the housing (3), and a screen (7) disposed inside the housing (3); wherein the housing cover (6) is provided with a feed inlet (8), and the housing (3) is provided with a discharge outlet (9); characterized in that: The box (3) is provided with a support frame (10), the screen (7) is placed on the support frame (10), and the screen (7) is provided with a pressing frame (11). The pressing frame (11), the screen (7) and the support frame (10) are connected as one unit by bolts (12). One end of the support frame (10) near the discharge port (9) is hinged to the box (3), and the other end is provided with a height adjustment mechanism (13).

2. The screening device for premixed mortar according to claim 1, characterized in that: The height adjustment mechanism (13) includes a base (132) with a waist-shaped groove (131) and fixed to the lower end of the support frame (10), a round rod (133) passing through the waist-shaped groove (131) and movable along the waist-shaped groove (131), a support seat (134) fixed to the round rod (133), an internal threaded sleeve (135) fixed to the lower end of the support seat (134), a screw (136) threadedly connected to the internal threaded sleeve (135), and a screw (136) fixed to the screw (136). The lower end has a rotating shaft (137), a worm gear (138) fixedly connected to the rotating shaft (137), a worm (139) meshing with the worm gear (138), and a cover (140) covering the worm gear (138) and the worm (139) and fixedly connected to the housing (3). The rotating shaft (137) extends out of the housing (3) and is rotatably connected to the cover (140) and the housing (3). The worm (139) is rotatably connected to the cover (140), and one end of it extends out of the cover (140).

3. The screening device for premixed mortar according to claim 2, characterized in that: The worm (139) has a guide section (141) at one end extending out of the cover (140). A locking sleeve (142) that can move along the guide section (141) is fitted on the guide section (141). A threaded section (143) is provided at the end of the guide section (141). A compression sleeve (144) is screwed onto the threaded section (143). An operating section (145) is provided at the end of the threaded section (143).

4. The screening device for premixed mortar according to claim 3, characterized in that: The locking sleeve (142) and the cover (140) have a number of limiting grooves (146) arranged in an annular array on their end faces. The cover (140) is provided with limiting protrusions (147) that cooperate with the limiting grooves (146). The locking sleeve (142) and the compression sleeve (144) are hinged.

5. The screening device for premixed mortar according to any one of claims 1-4, characterized in that: The support frame (10) includes a frame (101), multiple support bars (102) spaced apart on the frame (101), two long sides of the frame (101), and a retaining edge (103) on the side of the frame (101) located at the feed inlet (8).

6. The screening device for premixed mortar according to claim 5, characterized in that: The upper end of the frame (101) is provided with a positioning protrusion (104), and the screen (7) and the pressing frame (11) are provided with positioning holes (105) that are adapted to the positioning protrusion (104).

7. The screening device for premixed mortar according to any one of claims 2-4, characterized in that: The internal threaded sleeve (135) and the screw (136) are fitted with telescopic dust covers.

8. The screening device for premixed mortar according to any one of claims 1-4, characterized in that: The lid (6) and the body (3) are connected by a buckle (14).

9. The screening device for premixed mortar according to claim 5, characterized in that: The lid (6) and the body (3) are connected by a buckle (14).

Images