Concrete production waste slurry filter-pressing dehydration device

Abstract

The utility model discloses a concrete production waste slurry filter pressing dehydration device which comprises a filter pressing box, the inner walls of the two sides of the filter pressing box are respectively and movably connected with a first roller and a second roller through open holes by using bearings, the outer walls of the first roller and the second roller are provided with arc-shaped clamping grooves which are distributed at equal intervals, and the arc-shaped clamping grooves are connected with the filter pressing box. The outer walls of the two first rollers are sleeved with upper material pressing belts, and the outer walls of the two second rollers are sleeved with lower material pressing belts. The lower material pressing belt and the upper material pressing belt rotate reversely to convey waste slurry to an extrusion area of a gap between the rollers, the metal pipes are fixed in the arc-shaped clamping grooves of the rollers through the filter cloth inserting bags, the water filtering holes in the outer walls of the metal pipes and the filter cloth jointly form a continuous filtering layer, and the metal pipes are densely arranged in the axial direction of the rollers through the filter cloth inserting bags. The metal pipes and the filter cloth side pockets are nested and combined to form a three-dimensional water filtering structure, and the distribution of the metal pipes greatly improves the effective filter pressing area.

Description

Technical Field

[0001] This utility model relates to the field of concrete, specifically to a dewatering device for concrete production waste slurry. Background Technology

[0002] Concrete mixing plants, tunnel boring machine (TBM) construction, and other similar scenarios generate a large amount of concrete waste slurry with a moisture content of 80%-95%, which needs to be dehydrated to achieve resource utilization.

[0003] Existing concrete production waste slurry dewatering devices (belt filter presses) generally adopt a two-layer filter cloth filtration structure to squeeze the concrete waste slurry. The filtrate can only be discharged laterally through the gaps between the filter cloth fibers, resulting in a long drainage path and high resistance. This makes the pressure gauge ineffective, especially when treating waste slurry with high water content. Utility Model Content

[0004] The purpose of this invention is to provide a dewatering device for concrete production waste slurry by pressure filtration, in order to solve the above-mentioned shortcomings in the technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A dewatering device for concrete production waste slurry includes a filter press box. Two first rollers and a second roller are movably connected to the inner walls of both sides of the filter press box via bearings through openings. The outer walls of the first and second rollers have equally spaced arc-shaped grooves. An upper pressing belt is fitted onto the outer walls of the two first rollers, and a lower pressing belt is fitted onto the outer walls of the two second rollers. The upper and lower pressing belts are composed of equally spaced, intersecting filter cloths and filter cloth inserts. Adjacent filter cloths and filter cloth inserts are connected by stitching. Filter cloth inserts are inserted into the inner walls of the filter cloth inserts. The outer walls of the first and second rollers have equally spaced arc-shaped grooves, and the inner walls of these grooves fit into the outer walls of metal tubes via filter cloth inserts. The outer walls have equally spaced filter holes.

[0007] Preferably, the length of the lower pressing belt is greater than the length of the upper pressing belt, and the upper pressing belt is located at the top center of the lower pressing belt.

[0008] Preferably, two motor mounting covers are installed on one side of the filter press box, and motors are installed inside the two motor mounting covers. The output ends of the two motors are respectively connected to the rotating shafts of the first roller and the second roller.

[0009] Preferably, the outer walls of the filter press box have two sets of equally spaced sliding grooves. Each set of sliding grooves consists of two parts. A rotating shaft is slidably connected to the inner wall of the corresponding sliding groove. The rotating shaft is inserted into the lower pressing belt and the upper pressing belt, respectively. Bearings are movably connected to the outer walls of both ends of the rotating shaft. Two first fixing plates are fixedly provided on the outer wall of the bottom bearing, and two second fixing plates are fixedly provided on the outer wall of the top bearing.

[0010] Preferably, the outer wall of the first fixing plate is fixed with a vertically upward threaded guide rod, the outer wall of the second fixing plate is provided with a sliding hole, the outer wall of the threaded guide rod is slidably connected to the inner wall of the sliding hole, a compression spring is slidably connected to the outer wall of the threaded guide rod, a wing nut is screwed to the top of the threaded guide rod, the compression spring is located at the top of the second fixing plate, and the wing nut is located at the top of the compression spring.

[0011] Preferably, the outer wall of the rotating shaft is fixedly provided with two positioning discs, and the outer wall of the positioning discs is provided with equally spaced positioning grooves. The inner wall of the positioning grooves is fitted to the outer wall of the metal tube through a filter cloth insert.

[0012] Preferably, a feed hopper is installed on one side of the top of the filter press box through an opening, and a vertically downward discharge channel is connected to the bottom of the feed hopper. The discharge channel is located at the top end of the lower pressing belt, and a discharge pipe is installed at the bottom of the filter press box away from the feed hopper through an opening.

[0013] Preferably, the bottom of the filter press is connected to a drain pipe through an opening, a valve is installed on the drain pipe, and support legs are fixed at the four corners of the bottom of the filter press at equal intervals.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0015] 1. This utility model discloses a concrete production waste slurry pressure filtration and dewatering device. The waste slurry is transported to the squeezing zone between the rollers by the counter-rotating lower and upper pressure belts. The metal tubes are fixed in the arc-shaped groove of the rollers through filter cloth inserts. The water-filtering holes on the outer wall of the metal tubes and the filter cloth together form a continuous filtration layer. The metal tubes are densely arranged along the roller axis through the filter cloth inserts. The nested combination of the metal tubes and the filter cloth inserts forms a three-dimensional water-filtering structure. The distribution of the metal tubes greatly increases the effective pressure filtration area, thus improving the pressure filtration effect of the concrete waste slurry. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic cross-sectional view of the filter press box of this utility model;

[0019] Figure 3 This is a schematic diagram of the pressing belt structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the metal tube structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the first roller structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the rotating shaft structure of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Filter press box; 2-1. First roller; 2-2. Second roller; 2-3. Arc-shaped groove; 3. Lower pressing belt; 4. Upper pressing belt; 5. Filter cloth; 6. Filter cloth insert bag; 7. Metal pipe; 8. Filter hole; 9. Motor; 10. Motor fixing cover; 11. Sliding groove; 12. Rotary shaft; 13. Positioning plate; 14. Positioning groove; 15. Bearing; 16. First fixing plate; 17. Second fixing plate; 18. Threaded guide rod; 19. Sliding hole; 20. Butterfly nut; 21. Compression spring; 22. Discharge channel; 23. Feed hopper; 24. Discharge pipe; 25. Support legs; 26. Drain pipe; 27. Valve. Detailed Implementation

[0025] The following drawings will disclose several embodiments of this utility model. For clarity, many physical details will be described in the following description. However, it should be understood that these physical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these physical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0026] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0027] Example 1

[0028] Refer to the instruction manual appendix Figure 1-6 A concrete production waste slurry dewatering device includes a filter press box 1. The inner walls of both sides of the filter press box 1 are movably connected to a first roller 2-1 and a second roller 2-2 via bearings. An upper pressing belt 4 sleeved on the outer wall of the two first rollers 2-1 and a lower pressing belt 3 sleeved on the outer wall of the two second rollers 2-2 form a cross-closed structure. The front end of the lower pressing belt 3 extends below the feed hopper 23, and the rear end corresponds to the position of the discharge pipe 24. Both ends of a metal pipe 7 are inserted into arc-shaped grooves 2-3 on the outer wall of the rollers via filter cloth inserts 6. A positioning groove 14 on the positioning plate 13 forms an interference fit with the metal pipe 7. When the shaft 12 is adjusted up and down through the sliding groove 11, it drives the bearing 15 to move. The threaded guide rod 18 of the first fixed plate 16 is inserted into the sliding hole 19 of the second fixed plate 17. The compression spring 21 is sleeved on the outside of the threaded guide rod 18. After the butterfly nut 20 is tightened, the spring is compressed to realize the tension adjustment. The water-containing waste slurry falls onto the surface of the lower pressing belt 3 through the feeding channel 22. When the upper and lower pressing belts rotate in opposite directions, they are filtered twice through the water filter hole 8 of the metal pipe 7 and the filter cloth 5. The squeezed filtrate is discharged through the drain pipe 26. The valve 27 controls the flow rate. The supporting legs 25 support this utility model.

[0029] Example 2

[0030] Based on Embodiment 1, the design of the lower pressing belt 3 being longer than the upper pressing belt 4 ensures that the waste slurry falls into the lower pressing belt 3. The metal tube 7 is elastically fixed in the arc-shaped slot 2-3 through the filter cloth insert 6. When the motor 9 drives the roller to rotate, the positioning slot 14 of the positioning plate 13 is axially aligned with the metal tube 7. The rotating shaft 12 can change the gap between the upper and lower pressing belts by moving up and down along the sliding groove 11. The compression spring 21 buffers the roller pressure after being pre-tightened by the butterfly nut 20. The filter cloth 5 is sewn onto the surface of the filter cloth insert 6 and together with the metal tube 7 forms a continuous filter layer. The discharge pipe 24 collects the dewatered filter cake.

[0031] Example 3

[0032] Based on Example 1, after the operator loosens the butterfly nut 20, the compression spring 21 rebounds and releases the tension. The height of the rotating shaft 12 along the sliding groove 11 is adjusted to change the tension of the pressure belt. When the metal tube 7 is pulled out from the arc-shaped slot 2-3, the filter cloth insert 6 automatically disengages. After replacing the new metal tube, it is re-inserted into the positioning slot 14. The motor 9 starts and drives the first roller 2-1 and the second roller 2-2 to rotate synchronously in opposite directions. The upper and lower pressure belts apply squeezing pressure to the waste slurry in the intersection area. The filtrate seeps into the drain pipe 26 through the filter hole 8 of the metal tube 7. After the valve 27 is opened, the wastewater is discharged from the box. The feed hopper 23 distributes the waste slurry flow evenly through the discharge channel 22.

[0033] Example 4

[0034] Based on Embodiment 1, when the filter press box 1 is running, the upper pressing belt 4 spans across the outside of the first roller 2-1 to form an upper filter layer, and the lower pressing belt 3 spans across the outside of the second roller 2-2 to form a lower filter layer. The positioning discs 13 at both ends of the metal tube 7 are embedded in the arc-shaped grooves 2-3 of the roller. The rotating shaft 12 is supported by the bearing 15 and the spacing is adjusted along the sliding groove 11. The compression spring 21 provides stable pressure after being locked by the butterfly nut 20. The water-containing waste slurry falls onto the surface of the lower pressing belt 3 through the feeding channel 22. When the upper and lower pressing belts are running, the solid particles are doubly intercepted by the water filtration holes 8 of the metal tube 7 and the filter cloth 5. The dewatered filter cake is discharged from the discharge pipe 24, and the clean water collected by the drain pipe 26 is discharged through the valve 27.

[0035] Working principle of this utility model:

[0036] Refer to the instruction manual appendix Figure 1-6 Motors 9 are installed inside the motor mounting covers 10 on both sides of the filter press box 1. The output shaft of the motor 9 is connected to the rotating shafts 12 of the first roller 2-1 and the second roller 2-2 via a coupling, driving the first roller 2-1 and the second roller 2-2 to rotate synchronously in opposite directions. The lower pressing belt 3 is sleeved on the outer wall of the second roller 2-2 and conveys waste slurry forward as it rotates clockwise. The upper pressing belt 4 is sleeved on the outer wall of the first roller 2-1 and forms downward pressure due to its counterclockwise rotation. The two form a dynamic extrusion zone at the gap between the rollers. The metal tube 7 is fixed in the arc-shaped groove 2-3 of the roller through the filter cloth insert 6. When the roller rotates, its surface... The filter holes 8 and the filter cloth 5 together form a continuous filter layer. The waste slurry is forced through the holes of the metal tube 7 and the micropores of the filter cloth under the clamping of the pressure belt. The liquid seeps into the drain pipe 26, while the solid particles are intercepted and accumulated. The rotating shaft 12 is adjustable up and down along the sliding groove 11. The tension of the pressure belt is adjusted by the pre-tightening force of the compression spring 21 and the butterfly nut 20. During the extrusion process, the metal tube 7 and the filter cloth 5 are tightly attached. The positioning groove 14 of the positioning plate 13 prevents the metal tube from shifting axially. The supporting legs 25 stabilize the box body to withstand the extrusion force. The valve 27 controls the flow rate of the filtrate discharge, realizing the fully automated operation of continuous feeding, extrusion dewatering and filter cake discharge.

[0037] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A concrete production waste slurry filter-press dewatering device comprising a filter-press tank (1), characterized in that: Two first roller cylinders (2-1) and second roller cylinders (2-2) are movably connected to the inner walls of the two sides of the filter box (1) through openings and bearings, arc-shaped clamping grooves (2-3) are formed in the outer walls of the first roller cylinders (2-1) and the second roller cylinders (2-2), upper pressing belts (4) are sleeved on the outer walls of the two first roller cylinders (2-1), lower pressing belts (3) are sleeved on the outer walls of the two second roller cylinders (2-2), the upper pressing belts (4) and the lower pressing belts (3) are combined by equidistantly distributed filter cloths (5) and filter cloth insertion bags (6), adjacent filter cloths (5) and filter cloth insertion bags (6) are connected by sewing, filter cloth insertion bags (6) are inserted into the inner walls of the filter cloth insertion bags (6), arc-shaped clamping grooves (2-3) are formed in the outer walls of the first roller cylinders (2-1) and the second roller cylinders (2-2), the inner walls of the arc-shaped clamping grooves (2-3) are matched with the outer walls of metal pipes (7) through filter cloth insertion bags (6), and water filtering holes (8) are formed in the outer walls of the metal pipes (7).

2. The concrete production waste slurry filter-press dewatering device according to claim 1, characterized in that: The length of the lower pressing belt (3) is greater than that of the upper pressing belt (4), and the upper pressing belt (4) is located at the top central position of the lower pressing belt (3).

3. The concrete production waste slurry filter-press dewatering device according to claim 1, characterized in that: Two motor fixed covers (10) are installed on the outer walls of the filter box (1), electric motors (9) are installed in the two motor fixed covers (10), and the output ends of the two electric motors (9) are connected with the rotating shafts of the first roller cylinders (2-1) and the second roller cylinders (2-2) respectively.

4. The concrete production waste slurry filter-press dewatering device according to claim 1, characterized in that: Two groups of equidistantly distributed sliding grooves (11) are formed in the outer walls of the filter box (1), each group of sliding grooves (11) is divided into two, rotating shafts (12) are slidably connected to the inner walls of the sliding grooves (11), the rotating shafts (12) are inserted into the interiors of the lower pressing belts (3) and the upper pressing belts (4) respectively, bearings (15) are movably connected to the outer walls of the two ends of the rotating shafts (12), two first fixed pieces (16) are fixedly arranged on the outer walls of the bottom bearings (15), and two second fixed pieces (17) are fixedly arranged on the outer walls of the top bearings (15).

5. The device for dewatering of waste slurry from concrete production by pressure filtration according to claim 4, characterized in that: A vertically upward threaded guide rod (18) is fixedly arranged on the outer wall of the first fixed piece (16), a sliding hole (19) is formed in the outer wall of the second fixed piece (17), the outer wall of the threaded guide rod (18) is slidably connected with the inner wall of the sliding hole (19), a compression spring (21) is slidably connected to the outer wall of the threaded guide rod (18), a butterfly nut (20) is screwed on the top of the threaded guide rod (18), the compression spring (21) is located on the top of the second fixed piece (17), and the butterfly nut (20) is located on the top of the compression spring (21).

6. The concrete production waste slurry filter-press dewatering device according to claim 4, characterized in that: Two positioning discs (13) are fixedly arranged on the outer wall of the rotating shaft (12), equidistantly distributed positioning grooves (14) are formed in the outer wall of the positioning disc (13), and the inner walls of the positioning grooves (14) are matched with the outer walls of the metal pipes (7) through the filter cloth insertion bags (6).

7. The concrete production waste slurry filter-press dewatering device according to claim 1, characterized in that: The top side of the filter box (1) is provided with a feeding hopper (23) through an opening, the bottom of the feeding hopper (23) is communicated with a vertical downward discharging channel (22), the discharging channel (22) is located at the top end of the lower pressing belt (3), and the bottom of the filter box (1) is provided with a discharging pipe (24) through an opening away from the feeding hopper (23).

8. The concrete production waste slurry filter-press dewatering device according to claim 1, characterized in that: The bottom of the filter box (1) is communicated with a liquid discharge pipe (26) through an opening, the liquid discharge pipe (26) is provided with a valve (27), and the bottom of the filter box (1) is fixedly provided with support legs (25) distributed at equal distances at four corners.

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