A vibrating screen for dry mortar production

Abstract

This utility model relates to the field of vibrating screen technology, specifically disclosing a vibrating screen for dry mortar production, including a screening mechanism. An auxiliary discharge mechanism is installed inside the screening mechanism, and a drive mechanism is installed on one side of the external screening mechanism. This solution significantly improves screening efficiency and accuracy through an innovative screening mechanism design. The screening plate adopts a V-shaped structure and is paired with staggered guide plates to form an S-shaped discharge channel, extending the screening path of the dry mortar and ensuring sufficient material dispersion. The secondary screening design of screening holes one and two, combined with vibration, effectively reduces material blockage and local accumulation problems, enabling efficient separation of impurities from qualified powder. The staggered layout of the guide plates not only increases the screening contact area but also guides the material to slide down evenly through vibration, avoiding the uneven screening problem caused by material concentration in traditional screens.

Description

Technical Field

[0001] This utility model relates to the field of vibrating screen technology, and specifically discloses a vibrating screen for dry mortar production. Background Technology

[0002] Dry-mix mortar, also known as premixed mortar, is a dry-powder building material made by mixing raw materials such as cement, sand, additives, and mineral admixtures in a certain proportion. It is widely used in the construction industry, mainly for masonry, plastering, floor leveling, waterproofing, and other projects.

[0003] The production process of dry mortar is completed in the factory. Precise metering and mixing ensure the stability and consistency of product quality. This avoids quality problems caused by improper operation or uneven material mixing during on-site mortar mixing. For example, the utility model patent with authorization announcement number CN222490998U discloses a vibrating screen for dry mortar production, including a circular box and a cover. The bottom surface of the cover is provided with a drive shaft extending into the circular box. At least three sets of circular screen frames adapted to the size of the circular box are detachably mounted on the drive shaft. Each set of circular screen frames is equipped with a screen mesh, and the mesh aperture gradually decreases from top to bottom of the circular box. All components are detachably connected to the drive shaft via a circular sleeve. The circular sleeve includes a semi-circular block one and a semi-circular block two. The two ends of the semi-circular block one are provided with extended arc-shaped blocks, and the corresponding ends of the semi-circular block two are provided with arc-shaped grooves that are adapted to the arc-shaped blocks. The dry mortar is classified during rotation, realizing the classification of dry mortar into multiple specifications. At the same time, through the fitting of the cover and the circular box, removing the cover will drive the drive shaft and at least three sets of circular screens to be removed, and the circular sleeve can be disassembled, realizing the quick assembly and disassembly of the circular screens and the drive shaft.

[0004] Currently, in the production of dry mortar, it is necessary to screen the raw materials at each level to avoid the presence of stones and metal fragments, which would affect the quality of the dry mortar product. The most common screening equipment is a device based on a screening plate. However, a conventional screening plate assembly is simply an inclined plate structure with holes, coupled with a vibrating motor for vibrating screening. Due to the large screening volume of the raw materials, the materials are prone to crowding and agglomeration when entering the screening plate. As a result, the raw materials that should be able to pass through the screen holes are squeezed to other positions and cannot be screened normally. In addition, the screening path of a conventional screening plate is relatively short, which greatly increases the number of secondary screenings and reduces the screening accuracy. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a vibrating screen for dry mortar production, so as to solve the problem that the screening accuracy is reduced and the number of secondary screenings is increased due to the short screening path of conventional screening plates used for dry mortar screening.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a vibrating screen for dry mortar production, comprising a screening mechanism, an auxiliary discharge mechanism inside the screening mechanism, and a drive mechanism on one side of the outer side of the screening mechanism.

[0007] Furthermore, the screening mechanism includes a housing, with slides on both sides of the housing. A positioning frame is provided on the side of the slide away from the housing. A mounting hole penetrating the bottom horizontal plane of the positioning frame is provided. A positioning block is provided on the side of the positioning frame closer to the slide. A sliding groove is provided inside the slide, and the surface of the positioning block is slidably configured with respect to the sliding groove.

[0008] The inner side of the box is equipped with a screening plate, which has a V-shaped structure. The areas on both sides of the screening plate are inclined. Screening holes are opened on both sides of the screening plate. Several guide plates are distributed at the upper end of the screening plate. The guide plates are arranged in an alternating inclined manner based on the screening plate and form an S-shaped feeding channel with each other.

[0009] Furthermore, a screening channel is provided at the lower center of the screening plate. The screening channel and the screening plate are integrally formed. Several screening holes are provided on the surface of the screening channel.

[0010] Furthermore, the lower hollow area of ​​the box body has two symmetrically arranged feeding ramps, and a discharge port is provided between the two feeding ramps distributed on both sides. A waste hole penetrating the interior is opened on the side wall of the box body, and a ramp plate is provided on the outer wall surface of the box body, with the ramp plate located below the waste hole.

[0011] Furthermore, the upper hollowed-out area of ​​the box is covered with a top cover, and two symmetrically distributed feeding funnels are arranged through the surface of the top cover, with the feeding funnels located above the screening plate.

[0012] Furthermore, the auxiliary discharge mechanism includes a bearing that extends through the housing. A feeding shaft is interference-fitted onto the inner ring wall of the bearing. The feeding shaft is located inside the screening channel. Spiral blades are fixedly wound around the surface of the feeding shaft. A motor is installed at the outer end of the feeding shaft. A drive shaft is installed inside the motor. The end of the drive shaft is fixedly connected to the feeding shaft via a coupling.

[0013] Furthermore, the driving mechanism includes a sleeve, and several sleeves are provided. One end of the sleeve is fixedly installed on the surface of the housing by screws. A connecting rod is slidably connected inside any one sleeve. The ends of several connecting rods are provided with the same positioning frame II. The lower end of the positioning frame II is provided with mounting holes II through it on both horizontal surfaces. A spring is wound around the surface of the connecting rod. The two ends of the spring are fixedly installed to the end face of the sleeve and the vertical surface of the positioning frame II, respectively.

[0014] Furthermore, a support frame is provided above the second positioning frame, and a second motor is provided above the support frame. The second motor has a second rotating shaft for driving inside, and an eccentric wheel is fixedly installed at the end of the second rotating shaft. The near and far ends of the eccentric wheel are always in contact with the surface of the housing.

[0015] The working principle and beneficial effects of this solution are as follows: 1. This solution significantly improves screening efficiency and accuracy through innovative screening mechanism design. The screening plate adopts a V-shaped structure and is equipped with staggered guide plates to form an S-shaped feeding channel, which extends the screening path of dry mortar and ensures that the material is fully dispersed. The secondary screening design of screening hole one and screening hole two, combined with vibration, effectively reduces material blockage and local accumulation problems, and enables impurities to be efficiently separated from qualified powder. The staggered layout of the guide plates not only increases the screening contact area, but also guides the material to slide down evenly through vibration, avoiding the problem of uneven screening caused by material concentration in traditional screens. In addition, the linkage design of the screening channel and the spiral discharge mechanism allows for secondary screening to be carried out simultaneously during the impurity discharge process, further reducing the need for rework.

[0016] 2. As described in 1, the box body significantly improves working stability through a three-point positioning structure. The T-shaped positioning blocks on both sides of the box body cooperate with the sliding groove to ensure no deviation during horizontal vibration. The synergistic effect of the spring-linkage mechanism and the eccentric wheel realizes flexible buffering of vibration force and reduces mechanical impact. The ground fixation of positioning frame one and positioning frame two forms a triangular support, which, together with the limiting sliding of the connecting rod inside the sleeve, effectively suppresses the transmission of vibration to the external structure.

[0017] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0018] Figure 1 This is a schematic diagram showing the distribution of the various mechanisms in the embodiment;

[0019] Figure 2 This is a schematic diagram of the overall front structure of the embodiment;

[0020] Figure 3 This is a schematic diagram of the overall side structure of the embodiment;

[0021] Figure 4 This is a schematic diagram of the clothing structure inside the box in an embodiment;

[0022] Figure 5 This is a schematic diagram of the shape of the screening plate and the distribution structure of the guide plate in an embodiment.

[0023] Figure 6 This is a top view of the auxiliary material feeding mechanism in an embodiment.

[0024] Figure 7 This is a schematic diagram showing the location and shape of the unloading ramp in an embodiment.

[0025] The following are labeled in the attached diagram: 1. Screening mechanism; 2. Auxiliary discharge mechanism; 3. Drive mechanism; 10. Box body; 11. Slide seat; 12. Positioning frame one; 13. Mounting hole one; 14. Slide groove; 15. Positioning block; 16. Screening plate; 17. Guide plate; 18. Screening channel; 19. Screening hole one; 110. Screening hole two; 1001. Discharge ramp; 1002. Waste hole; 1003. Ramp plate; 1004. Top cover; 1005. Feed hopper; 20. Bearing; 21. Feeding shaft; 22. Spiral blade; 23. Motor one; 30. Sleeve; 31. Connecting rod; 32. Positioning frame two; 33. Spring; 34. Mounting hole two; 35. Support frame; 36. Motor two; 37. Eccentric wheel. Detailed Implementation

[0026] The following detailed description illustrates the specific implementation method:

[0027] Example

[0028] like Figures 1 to 7 As shown, a vibrating screen for dry mortar production is disclosed, including a screening mechanism 1, an auxiliary discharge mechanism 2 is provided inside the screening mechanism 1, and a drive mechanism 3 is provided on the outer side of the screening mechanism 1.

[0029] The screening mechanism 1 includes a housing 10, which is a rectangular hollow structure. Slides 11 are respectively installed on both sides of the housing 10. One side of each slide 11 is fixed to the housing 10 with screws. A positioning frame 12 is installed on the side of the slide 11 away from the housing 10. The positioning frame 12 has an L-shaped structure, and a mounting hole 13 penetrating its interior is opened on the bottom horizontal plane of the positioning frame 12. A positioning block 15 is installed on the side of the positioning frame 12 closest to the slide 11. A sliding groove 14 is provided inside the slide 11. The sliding arrangement of the positioning block 15 and the slide groove 14, through the cooperation of the positioning block 15 and the slide groove 14, ensures the stability of the horizontal reciprocating movement of the housing 10 during reciprocating vibration. Both the side shape of the positioning block 15 and the side shape of the slide groove 14 are T-shaped structures, allowing the positioning block 15 to slide based on the slide groove 14, providing an anti-detachment effect. The positioning frames 12 distributed along both sides are installed at fixed positions on the ground through screws passing through the mounting holes 13, ensuring the positioning of the housing 10 relative to the ground. The screening plate 16 is fixedly installed on the inner side of the housing 10. The screening plate 16 has a V-shaped structure, with inclined sections on both sides. The side walls of the screening plate 16 are fixed to the inner wall of the housing 10 by screws. Screening holes 19 are provided on both sides of the screening plate 16. Several guide plates 17 are distributed on the upper end of the screening plate 16. The guide plates 17 are fixed to the screening plate 16 by screws. The guide plates 17 are arranged in an alternating inclined pattern based on the screening plate 16 and are mutually inclined. An S-shaped feeding channel is formed between the two, so that when dry mortar needs to be screened, it can fall from the upper part of the slope of the screening plate 16 and be screened through the screening hole 19 for the first screening. The feeding channel presented by the guide plate 17 can increase the movement path of the dry mortar, thereby improving the accuracy of the screening process. In conjunction with the vibration effect of the screening plate 16, the feeding blockage can be avoided. Through the guidance of the feeding channel, the local crowding and accumulation of dry mortar can also be avoided during screening, reducing the number of secondary screenings.

[0030] A screening channel 18 is provided at the lower center of the screening plate 16. The screening channel 18 and the screening plate 16 are integrally formed. When the guide plate 17 discharges the screened impurities from the slopes on both sides of the screening plate 16, they can enter the screening channel 18 for waste discharge. The surface of the screening channel 18 is provided with several screening holes 110 that penetrate through it. The screening holes 110 can perform auxiliary secondary screening after screening by the screening holes 19. Thus, the crushed material discharged from the screening plate 16 into the screening channel 18 can be screened twice in the whole process, improving the screening efficiency.

[0031] The lower hollow area of ​​the housing 10 has two symmetrically arranged feeding ramps 1001. The side walls of the feeding ramps 1001 are fixed to the inner wall of the housing 10 with screws. A discharge port is provided between the two feeding ramps 1001 distributed along both sides. The discharge port can collect and discharge fine powder mortar that meets the specifications after screening. A waste hole 1002 penetrating through the interior is provided on the side wall of the housing 10. The waste hole 1002 can be used to discharge impurities that do not meet the specifications, such as… Stones, metal scraps, etc., are disposed of through a waste hole 1002 located at the end of the feeding shaft 21 away from the motor 23. The waste hole 1002 is also connected to the feeding shaft 21. A ramp 1003 is provided on the outer wall of the housing 10. The top of the ramp 1003 is fixed to the surface of the housing 10 by screws. The ramp 1003 is located below the waste hole 1002 and can be used to receive and guide the discharge of impurities, so as to avoid separation from the collection location of fine powder mortar that meets the regulations.

[0032] The upper part of the box 10 is covered by a top cover 1004. The lower part of the top cover 1004 is fixed to the box 10 by screws. Two symmetrically distributed feed funnels 1005 are arranged through the surface of the top cover 1004. The feed funnels 1005 are fixed to the top cover 1004 by screws. The feed funnels 1005 are located above the screening plate 16, and the feeding position of the feed funnels 1005 corresponds to the upper end of the feeding channel formed by the guide plate 17. This ensures that the dry mortar to be screened can be initially positioned above the slope of the screening plate 16 when it is fed, thus ensuring the stable operation of the screening process.

[0033] The auxiliary discharge mechanism 2 includes a bearing 20, which extends through the housing 10. The bearing 20 is fixed to the housing 10 by screws. A feeding shaft 21 is interference-fitted onto the inner wall of the bearing 20. The feeding shaft 21 is located inside the screening channel 18. The lower half of the screening channel 18 has a semi-circular cross-section. A spiral blade 22 is fixedly wound around the surface of the feeding shaft 21. The outer spiral surface of the spiral blade 22 can fit into the semi-circular inner wall of the lower half of the screening channel 18. When the feeding shaft 21 rotates, the spiral blade 22 can move in tandem to screen the material that has passed through the screening plate 16. Impurities are discharged through an auxiliary screw conveyor. During the screw conveyor process, secondary screening can be performed through the screening holes 110 on the screening channel 18 to achieve stable functional linkage. A motor 23 is installed at the outer end of the feeding shaft 21. The outer wall of the motor 23 is fixedly installed on the outer wall of the housing 10 through a bracket. A drive shaft is installed inside the motor 23. The end of the drive shaft is fixedly connected to the feeding shaft 21 through a coupling. After the motor 23 is powered on, its shaft can drive the feeding shaft 21 to rotate stably.

[0034] The drive mechanism 3 includes several sleeves 30. One end of each sleeve 30 is fixed to the surface of the housing 10 by screws. A connecting rod 31 is slidably connected inside each sleeve 30. The ends of the connecting rods 31 share a common positioning frame 32. The positioning frame 32 is fixed to any connecting rod 31 by screws. The positioning frame 32 is an inverted T-shaped structure. Mounting holes 34 are formed on both horizontal sides of the lower end of the positioning frame 32, allowing the positioning frame 32 to be fixed to a ground point via screws through the mounting holes 34. The installation of the positioning frame 2 32 and the two positioning frames 12 ensures that the box 10 has a three-point positioning effect when the vibrating screen is working, further improving the positional stability of the box 10 during operation. The surface of the connecting rod 31 is wound with a spring 33. The two ends of the spring 33 are fixedly installed to the end face of the sleeve 30 and the vertical surface of the positioning frame 2 32, respectively. When the box 10 reciprocates, the spring 33 can first extend and retract relative to the sleeve 30 through the connecting rod 31 to achieve limited sliding, and then return to the original position through the stretching of the spring 33, so that the box 10 can achieve the return and stability during reciprocating movement.

[0035] A support frame 35 is provided above the positioning frame 2 32. The support frames 35 are symmetrically distributed above the positioning frame 2 32. The support frames 35 are right-angled structures with reinforcing ribs fixed in their inner corner areas. The end faces of the support frames 35 and the positioning frame 2 32 are fixed by welding. A motor 2 36 is provided above the support frame 35. The outer wall of the motor 2 36 is fixedly assembled to the upper horizontal surface of the support frame 35 by a bracket. The motor 2 36 has a rotating shaft 2 for driving inside. An eccentric wheel 37 is fixedly installed at the end of the rotating shaft 2. The proximal and distal ends of the eccentric wheel 37 are always in contact with the surface of the housing 10. When the housing 10 is to reciprocate, the power supply of motor 2 36 is turned on. Motor 2 36 drives shaft 2 and causes eccentric wheel 37 to rotate. Thus, the near and far ends of eccentric wheel 37 continuously contact housing 10. With the connecting rod 31 sliding in sleeve 30 and the spring 33 stretching and returning to its original position, the reciprocating vibration of housing 10 can be stabilized. This allows screening plate 16 to stably screen and filter impurities in dry mortar. Positioning block 15 slides inside slide groove 14, which can assist in sliding support for the reciprocating vibration of housing 10, further ensuring the safety of the entire working process of housing 10.

[0036] In practice

[0037] The screening mechanism 1 in this scheme achieves multi-stage screening of dry mortar through the screening plate 16 and guide plate 17 inside the housing 10. The screening plate 16 adopts a V-shaped structure with inclined slopes on both sides and screening holes 19. After the dry mortar enters from the feed funnel 1005, it first slides down the slope of the screening plate 16 and undergoes initial screening through the screening holes 19. Qualified fine materials fall to the bottom, while larger impurities continue to move along the slope. The guide plates 17 are arranged in an S-shaped discharge channel, which extends the material flow path, improves screening accuracy, and avoids accumulation and blockage. After the initial screening... Impurities enter the screening channel 18, which has screening holes 110 on its surface to perform secondary screening of residual fine materials, ensuring thorough screening. Finally, qualified materials are collected at the discharge port via the discharge ramp 1001, while impurities are discharged through the waste hole 1002, achieving efficient separation. During the screening process, the vibration of the box 10 is controlled by the drive mechanism 3, which drives the screening plate 16 to vibrate at high frequency, further promoting material flow and screening efficiency. The combination design of the V-shaped screening plate 16 and the guide plate 17 not only optimizes the screening path but also reduces manual intervention, ensuring the stability of continuous production.

[0038] The auxiliary discharge mechanism 2 realizes automatic discharge and secondary screening of impurities through the feeding shaft 21 and the spiral blade 22. The screened impurities enter the screening channel 18 (the lower half is a semi-circular structure). The feeding shaft 21 is driven to rotate by the motor 23, which drives the spiral blade 22 to push the impurities to the waste hole 1002. The outer edge of the spiral blade 22 fits with the inner wall of the screening channel 18 to ensure smooth impurity conveying. At the same time, during the pushing process, the residual fine material can be screened again through the screening hole 110 to avoid resource waste.

[0039] The drive mechanism 3 achieves the reciprocating vibration of the housing 10 through the eccentric wheel 37 and the spring buffer system. The motor 2 36 drives the eccentric wheel 37 to rotate, and its near and far ends alternately contact the surface of the housing 10, generating periodic impact force, causing the housing 10 to vibrate horizontally. The vibration energy is transmitted through the sliding of the connecting rod 31 and the sleeve 30, and is buffered and reset by the spring 33, ensuring that the vibration is stable and the amplitude is controllable. The three-point positioning design (two positioning frames 12 and one positioning frame 32) further stabilizes the housing 10 and prevents vibration displacement. The T-shaped fit structure of the positioning block 15 and the slide groove 14 ensures the degree of freedom of sliding and prevents the risk of dislocation. The spring 33 repeatedly extends and retracts during vibration, absorbs the impact force and assists the housing 10 to return to its position, reducing mechanical wear.

[0040] The above description is merely an embodiment of this utility model, and common knowledge such as specific structures and characteristics in the solution is not described in detail here. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model, and these should also be considered within the protection scope of this utility model. These modifications and improvements will not affect the effectiveness of the implementation of this utility model or its practicality.

Claims

1. A dry powder mortar production shaker screen, characterized by: The device includes a screening mechanism, an auxiliary discharge mechanism inside the screening mechanism, and a drive mechanism on one side of the screening mechanism. The screening mechanism comprises a housing, with slides on both sides of the housing. A positioning frame is located on the side of the slide away from the housing. A mounting hole penetrating the bottom of the positioning frame is formed on its horizontal bottom surface. A positioning block is located on the side of the positioning frame closest to the slide. A sliding groove is provided inside the slide, and the surface of the positioning block slides along the groove. The inner side of the box is equipped with a screening plate, which has a V-shaped structure. The areas on both sides of the screening plate are inclined. Screening holes are opened on both sides of the screening plate. Several guide plates are distributed at the upper end of the screening plate. The guide plates are arranged in an alternating inclined manner based on the screening plate and form an S-shaped feeding channel with each other. A screening channel is provided at the lower center of the screening plate. The screening channel and the screening plate are integrally formed. Several screening holes are opened on the surface of the screening channel.

2. A vibrating screen for dry-mix mortar production according to claim 1, characterized in that: The lower hollow area of ​​the box has two symmetrically arranged feeding ramps. A discharge port is provided between the two feeding ramps distributed on both sides. A waste hole is opened on the side wall of the box and penetrates its interior. A ramp plate is provided on the outer wall of the box and is located below the waste hole.

3. A vibrating screen for dry-mix mortar production according to claim 2, characterized in that: The upper part of the box is covered by a top cover, and two symmetrically distributed feed funnels are arranged through the surface of the top cover. The feed funnels are located above the screening plate.

4. A vibrating screen for dry-mix mortar production according to claim 3, characterized in that: The auxiliary discharge mechanism includes a bearing that runs through the housing. A feeding shaft is interference-fitted onto the inner ring wall of the bearing. The feeding shaft is located inside the screening channel. Spiral blades are fixedly wound on the surface of the feeding shaft. A motor is installed at the outer end of the feeding shaft. A rotating shaft for driving is installed inside the motor. The end of the rotating shaft is fixedly connected to the feeding shaft via a coupling.

5. A dry-mix mortar production shaker according to claim 4, characterized in that: The driving mechanism includes a sleeve, and several sleeves are provided. One end of the sleeve is fixedly installed on the surface of the housing by screws. A connecting rod is slidably connected inside any one sleeve. The ends of several connecting rods are provided with the same positioning frame II. The lower end of the positioning frame II has two horizontal planes with mounting holes II that penetrate through it. Springs are wound around the surface of the connecting rods. The two ends of the springs are fixedly installed to the end face of the sleeve and the vertical plane of the positioning frame II, respectively.

6. A dry-mix mortar production shaker according to claim 5, characterized in that: A support frame is provided above the positioning frame 2, and a motor 2 is provided above the support frame. A rotating shaft 2 for driving is provided inside the motor 2. An eccentric wheel is fixedly installed at the end of the rotating shaft 2, and the near and far ends of the eccentric wheel are always in contact with the surface of the box.

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