Coarse aggregate screening device for concrete mixing plant

Abstract

The utility model discloses a coarse aggregate screening device for a concrete mixing plant, which relates to the technical field of vibrating screens and comprises a frame, a plurality of support columns are fixedly mounted at the upper end of the frame, a screening box is arranged on the plurality of support columns, and the screening box is movably mounted on the plurality of support columns through a plurality of support springs. Two bearing frames are fixedly installed in the supporting column, a plurality of screen plates are arranged on the bearing frames, the screening hole diameters of the screen plates on the two bearing frames are different, and the screen plates are fixedly installed on the bearing frames through installation mechanisms. The multiple screen plates are arranged in the screening box, so that part of the screen plates can be replaced according to the damage condition, the maintenance cost is reduced, in addition, by means of the arrangement of the installation mechanism, namely, the installation mechanism is composed of a fixing base, a limiting frame, a spring bolt plate and other components, rapid disassembly and assembly of the screen plates in the screening box can be achieved; and the situation that the sieve plate is loosened or separated from the bearing frame due to vibration is avoided, and the use stability of the sieve plate is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of vibrating screens, and particularly relates to a coarse aggregate screening device for a concrete mixing plant. Background Art

[0002] The coarse aggregate screening device used in a concrete mixing plant is an important piece of equipment, mainly used for screening and grading the coarse aggregates in the concrete raw materials. This device usually consists of parts such as a vibrating screen, a conveyor belt, and a control system. During operation, the raw materials are fed into the vibrating screen through the conveyor belt, and the vibrating screen separates the aggregates of different particle sizes through vibration. The aggregates with larger particle sizes remain on the screen surface, while the aggregates with smaller particle sizes fall through the screen holes, thus achieving hierarchical screening.

[0003] For example, a concrete mixing plant aggregate screening device disclosed in the publication number CN218797255U. Through the settings of the first chute, the frame, the coarse-hole screen, the first slider, the limiting block, and the first fixing screw, the cooperation of the first chute and the first slider can facilitate the disassembly between the coarse-hole screen and the outer shell when the coarse-hole screen is damaged or needs to be cleaned, so that the aggregates are divided into three grades: large, medium, and small, which is convenient for use in different places. However, when the sieve plate of the vibrating screen screens the aggregates, after a period of use, due to the physical properties of the aggregates themselves, such as hardness, particle size, etc., it will directly wear the sieve plate. Especially when there are a large number of sharp particles or hard objects in the aggregates, these particles will rub and impact with the sieve plate during the screening process of the vibrating screen, resulting in the gradual wear of the sieve plate surface and even damage. Therefore, when dealing with the damaged sieve plate in this application and existing vibrating screens, the entire sieve plate is replaced, and this replacement method will cause the undamaged part of the sieve plate to be unable to be reused, resulting in waste of resources. When the sieve plate is fixedly installed in the equipment through structures such as screws, since the equipment realizes the screening of aggregates through vibration, the screws fixing the sieve plate will become loose, and the loose sieve plate will further affect the screening of aggregates and even increase the probability of sieve plate damage. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a coarse aggregate screening device for a concrete mixing plant, which can effectively solve the problems in the background art.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A coarse aggregate screening device for a concrete mixing plant, comprising a frame. A plurality of support columns are fixedly installed at the upper end of the frame. A screening box is arranged on the plurality of support columns, and the screening box is movably installed on the plurality of support columns through a plurality of support springs. Two bearing brackets are fixedly installed inside the support columns. A plurality of sieve plates are arranged on the bearing brackets, and the sieve apertures of the sieve plates on the two bearing brackets are different. The sieve plates are fixedly installed on the bearing brackets through an installation mechanism. The installation mechanism includes a limit frame, a locking tongue plate and two fixed seats. The two fixed seats are respectively fixedly installed on one side of the screening box. The limit frame is movably installed between the two fixed seats. The locking tongue plate is movably installed inside the screening box located between the two fixed seats. An exciter is also fixedly installed inside the screening box located between the two bearing brackets. The exciter is electrically connected to an external controller through a cable. First discharge trays and second discharge trays are respectively fixedly installed on one side of the screening box located on one side of the two bearing brackets.

[0007] As a further optimized scheme of the utility model, a plurality of installation through slots are opened on both sides of the screening box. Through the opening of the installation through slots, the locking tongue plate can be movably installed in the installation through slots.

[0008] As a further optimized scheme of the utility model, fixing blocks are respectively fixedly installed on one side of the two fixed seats. A first clamping block is fixedly installed at the upper end of the fixing block. The two fixed seats are respectively fixedly installed on the screening box located on one side of the installation through slot by welding.

[0009] As a further optimized scheme of the utility model, the limit frame is in a C-shaped structure. Slots are opened at both ends of the limit frame. Limit blocks are fixedly installed on both sides inside the limit frame. A plurality of jacks are also opened on the part of the limit frame parallel to the screening box. The slots at both ends of the limit frame are respectively inserted and installed on the corresponding fixing blocks and first clamping blocks, that is, the limit frame is inserted and installed between the two fixed seats. Through the setting of the limit frame, the control and limitation of the moving process of the locking tongue plate can be realized.

[0010] As a further optimized scheme of the utility model, limit grooves are opened at both ends of the locking tongue plate. Two second clamping blocks are fixedly installed at the lower end of the locking tongue plate. Three guide shafts are fixedly installed at the end of the locking tongue plate relative to the limit frame. The locking tongue plate and the second clamping blocks are inserted and installed in the corresponding installation through slots, while the limit grooves are inserted and installed on one side of the corresponding limit blocks. One end of the guide shaft is inserted and installed in the corresponding jack. A compression spring is sleeved on the guide shaft located between the limit frame and the locking tongue plate. By setting the second clamping blocks at the lower end of the locking tongue plate and cooperating with the guide shafts and the compression spring, the rapid disassembly and assembly of the sieve plate on the bearing bracket can be realized.

[0011] As a further optimization solution of the utility model, two card slots are provided at both ends of the sieve plate, the sieve plate is laid on the support frame, and the second card blocks at the lower ends of the two locking tongue plates are respectively mounted in the corresponding card slots.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model discloses a coarse aggregate screening device for a concrete mixing station, in which a plurality of sieve plates are arranged in a screening box, so that some of the sieve plates can be replaced according to the damage conditions, thereby reducing maintenance costs. In addition, with the arrangement of an installation mechanism, that is, the installation mechanism is composed of a fixed seat, a limit frame, a locking tongue plate and other components, the sieve plates can be quickly disassembled and assembled in the screening box, and the sieve plates will not become loose or detached from the supporting frame due to vibration, thereby ensuring the stability of the sieve plates in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the screen plate installation structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the local structure of the screening box of the utility model;

[0017] Figure 4 This is a schematic diagram of the disassembly of the installation mechanism structure of the utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the bolt plate of the utility model;

[0019] Figure 6 This is a schematic diagram of the screen plate structure of the utility model.

[0020] In the figure: 1. frame; 2. support column; 3. screening box; 4. support spring; 5. support bracket; 6. sieve plate; 7. mounting mechanism; 8. fixed seat; 9. limit frame; 10. lock tongue plate; 11. first feed tray; 12. second feed tray; 13. mounting slot; 14. fixed block; 15. first clamping block; 16. slot; 17. jack; 18. limit block; 19. limit slot; 20. second clamping block; 21. guide shaft; 22. compression spring; 23. slot; 24. vibrator. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figures 1 - 6As shown in the figure, a coarse aggregate screening device for a concrete mixing plant provided by the utility model includes a frame 1. A plurality of support columns 2 are fixedly installed at the upper end of the frame 1. A screening box 3 is arranged on the plurality of support columns 2, and the screening box 3 is movably installed on the plurality of support columns 2 through a plurality of support springs 4. Two support brackets 5 are fixedly installed inside the support columns 2. A plurality of sieve plates 6 are arranged on the support brackets 5, and the sieve apertures of the sieve plates 6 on the two support brackets 5 are different. The sieve plates 6 are fixedly installed on the support brackets 5 through an installation mechanism 7. The installation mechanism 7 includes a limit frame 9, a locking tongue plate 10 and two fixed seats 8. The two fixed seats 8 are respectively fixedly installed on one side of the screening box 3. The limit frame 9 is movably installed between the two fixed seats 8. The locking tongue plate 10 is movably installed inside the screening box 3 located between the two fixed seats 8. An exciter 24 is also fixedly installed inside the screening box 3 located between the two support brackets 5. The exciter 24 is electrically connected to an external controller through a cable. A first discharge tray 11 and a second discharge tray 12 are respectively fixedly installed on one side of the screening box 3 located on one side of the two support brackets 5.

[0023] As Figure 3 shown, a plurality of installation through slots 13 are opened on both sides of the screening box 3. Through the opening of the installation through slots 13, the locking tongue plate 10 can be movably installed inside the installation through slots 13;

[0024] As Figures 2 - 4 shown, fixing blocks 14 are respectively fixedly installed on one side of the two fixed seats 8. A first clamping block 15 is fixedly installed at the upper end of the fixing block 14. The two fixed seats 8 are respectively fixedly installed on the screening box 3 located on one side of the installation through slots 13 by welding. The limit frame 9 has a C-shaped structure. Slots 16 are opened at both ends of the limit frame 9. Limit blocks 18 are fixedly installed on both sides inside the limit frame 9. A plurality of jacks 17 are also opened on the part of the limit frame 9 parallel to the screening box 3. The slots 16 at both ends of the limit frame 9 are respectively inserted and installed on the corresponding fixing blocks 14 and the first clamping blocks 15, that is, the limit frame 9 is inserted and installed between the two fixed seats 8. Through the setting of the limit frame 9, the control and limitation of the moving process of the locking tongue plate 10 can be realized;

[0025] As Figures 3 - 6As shown in the figure, limiting grooves 19 are provided at both ends of the locking tongue plate 10. Two second clamping blocks 20 are fixedly installed at the lower end of the locking tongue plate 10. Three guide shafts 21 are fixedly installed at one end of the locking tongue plate 10 relative to the limiting frame 9. The locking tongue plate 10 and the second clamping blocks 20 are inserted and installed in the corresponding installation through grooves 13, while the limiting grooves 19 are inserted and installed on one side of the corresponding limiting blocks 18. One end of the guide shaft 21 is inserted and installed in the corresponding jack 17. A compression spring 22 is sleeved on the guide shaft 21 between the limiting frame 9 and the locking tongue plate 10. By arranging the second clamping blocks 20 at the lower end of the locking tongue plate 10 and cooperating with the guide shaft 21 and the compression spring 22, the quick disassembly and assembly of the sieve plate 6 on the bearing bracket 5 can be realized. Two clamping grooves 23 are provided at both ends of the sieve plate 6. The sieve plate 6 is paved on the bearing bracket 5, and the second clamping blocks 20 at the lower ends of the two locking tongue plates 10 are respectively clamped in the corresponding clamping grooves 23.

[0026] It should be noted that the present utility model is a coarse aggregate screening device for a concrete mixing station. When installing the sieve plate 6, the sieve plate 6 can be directly placed on the corresponding bearing bracket 5 and pressed against the bearing bracket 5. Then, both ends of the sieve plate 6 respectively squeeze the locking tongue plates 10 on one side inside the screening box 3, so that the locking tongue plates 10 drive a plurality of guide shafts 21 to move in the corresponding jacks 17, and the locking tongue plates 10 compress the compression springs 22 outside the guide shafts 21 towards the limiting frame 9. After the upper surface of the sieve plate 6 moves to the position below the locking tongue plate 10, the locking tongue plate 10 is reset and moved by the acting force of the compression spring 22, so that the two second clamping blocks 20 at the lower end of the locking tongue plate 10 can be respectively inserted into the corresponding clamping grooves 23 at one end of the sieve plate 6, and the locking tongue plate 10 is still located above the sieve plate 6, thus completing the quick installation of the sieve plate 6.

[0027] When disassembling the sieve plate 6, only need to manually squeeze the two locking tongue plates 10 to one side respectively, so that one end of the two locking tongue plates 10 respectively contracts into the corresponding installation through grooves 13. After the locking tongue plates 10 do not limit the sieve plate 6, the sieve plate 6 is jacked up a certain distance by the deformation of the rubber pad between the sieve plate 6 and the bearing bracket 5. Then, the locking tongue plates 10 can be released by hand, and the two ends of the sieve plate 6 limit the movement of the locking tongue plates 10, so that the sieve plate 6 can be taken off from the bearing bracket 5.

[0028] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A coarse aggregate screening device for a concrete mixing station, characterized in that: The machine comprises a frame (1), a plurality of support columns (2) being fixedly mounted on the upper end of the frame (1), a screening box (3) being arranged on the plurality of support columns (2), and the screening box (3) being movably mounted on the plurality of support columns (2) via a plurality of support springs (4), two support brackets (5) being fixedly mounted inside the support columns (2), a plurality of sieve plates (6) being arranged on the support brackets (5), and the sieve plates (6) on the two support brackets (5) having different sieve apertures, and the sieve plates (6) being fixedly mounted on the support brackets (5) via a mounting mechanism (7); The mounting mechanism (7) comprises a limit frame (9), a locking tongue plate (10) and two fixed seats (8), the two fixed seats (8) are respectively fixedly mounted on one side of the screening box (3), the limit frame (9) is movably mounted between the two fixed seats (8), the locking tongue plate (10) is movably mounted in the screening box (3) between the two fixed seats (8), and an exciter (24) is also fixedly mounted in the screening box (3) between the two supporting frames (5), and the exciter (24) is electrically connected to an external controller via a cable. The screening box (3) located on one side of the two supporting frames (5) is also respectively fixedly mounted with a first discharge tray (11) and a second discharge tray (12).

2. A coarse aggregate screening device for a concrete mixing station according to claim 1, characterized in that: A plurality of installation slots (13) are provided on both sides of the screening box (3).

3. A coarse aggregate screening device for a concrete mixing station according to claim 2, characterized in that: A fixing block (14) is fixedly mounted on one side of each of the two fixing seats (8), a first clamping block (15) is fixedly mounted on the upper end of each of the fixing blocks (14), and the two fixing seats (8) are fixedly mounted on the screening box (3) located on one side of the mounting slot (13) by welding.

4. A coarse aggregate screening device for a concrete mixing station according to claim 3, characterized in that: The limiting frame (9) is in a C-shaped structure. Both ends of the limiting frame (9) are provided with slots (16). Both sides of the limiting frame (9) are fixedly installed with limiting blocks (18). The portion of the limiting frame (9) parallel to the screening box (3) is also provided with a plurality of insertion holes (17). The slots (16) at both ends of the limiting frame (9) are respectively inserted and installed on the corresponding fixed blocks (14) and the first clamping block (15), that is, the limiting frame (9) is inserted and installed between the two fixed seats (8).

5. A coarse aggregate screening device for a concrete mixing station according to claim 4, characterized in that: Both ends of the bolt plate (10) are provided with limiting grooves (19), and two second clamping blocks (20) are fixedly mounted on the lower end of the bolt plate (10). One end of the bolt plate (10) opposite to the limiting frame (9) is fixedly mounted with three guide shafts (21). The bolt plate (10) and the second clamping blocks (20) are inserted and mounted in corresponding installation through grooves (13), and the limiting grooves (19) are inserted and mounted on one side of the corresponding limiting blocks (18). One end of the guide shaft (21) is inserted and mounted in the corresponding insertion hole (17), and the guide shaft (21) located between the limiting frame (9) and the bolt plate (10) is sleeved with a compression spring (22).

6. A coarse aggregate screening device for a concrete mixing station according to claim 5, characterized in that: Two clamping grooves (23) are provided at both ends of the sieve plate (6); the sieve plate (6) is installed on the support frame (5), and the second clamping blocks (20) at the lower ends of the two locking tongue plates (10) are respectively clamped in the corresponding clamping grooves (23).

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