Sand washing and dewatering all-in-one machine

Abstract

The utility model relates to a sand washing and dewatering all-in-one machine which comprises a sand washing pool, a sand washing wheel installed in the sand washing pool in a self-rotating mode and a dewatering screen arranged on the downstream portion of the sand washing pool. The device comprises a sand washing pool, and further comprises a reciprocating driving mechanism arranged on the sand washing pool, a pair of swing rods rotationally connected to the sand washing pool, a first stirring paddle rotationally connected between the pair of swing rods and arranged close to the discharging side of the sand washing pool, a transmission mechanism and a pair of sliding rods slidably connected to the sand washing pool. The second stirring paddles are rotationally connected between the pair of sliding rods and are arranged close to the feeding side of the sand washing pool, and an output shaft of the reciprocating driving mechanism is arranged at the rotating end of one swing rod; an input shaft of the transmission mechanism is arranged at the rotating end of the other swing rod, and the moving end of the transmission mechanism is arranged on one sliding rod. The gravel stirring and cleaning device has the effects of improving the gravel stirring and cleaning effect and controlling the solid content in cleaning waste water.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sand and gravel cleaning, and particularly relates to a sand washing and dewatering integrated machine. BACKGROUND

[0002] Concrete is the most widely used man-made engineering material in the world, and its preparation and application have a profound and lasting impact on the natural environment and the human social environment. With the increase in concrete production, the amount of wastewater generated will also continue to grow. These wastewaters are mainly derived from site flushing, sand production wastewater treatment, sand and gravel cleaning, and residual concrete cleaning of production and transportation equipment. Improper handling of these wastewaters will lead to situations such as wastewater overflow and waste residue accumulation. Since wastewater mainly contains mud, cement, fly ash, mineral powder, and their hydration products or ions such as Ca 2+ , OH - , K + , Na + , SO4 2- , etc. introduced by additives and mineral admixtures, the presence of these components makes the properties of wastewater uncertain and has a high alkali content. Direct discharge not only wastes resources but also pollutes the soil and water sources.

[0003] Currently, environmental protection issues in concrete production are also being highly valued, and many concrete production companies are increasingly investing in wastewater treatment. Studies have shown that wastewater has some impact on the performance of cement, but it is within the scope of the cement standard requirements and has little effect on the flexural strength and compressive strength of cement. Some studies have shown that the standard water content of cement is positively correlated with the amount of wastewater. For every 20% increase in wastewater, the water content increases by about 0.5%. When wastewater completely replaces clean water, the total water content increases by about 2.3%. At the same time, the water content is positively correlated with the solid content of wastewater, i.e., the higher the solid content, the greater the water content of cement. Therefore, by improving the sand washing process of the sand washing and dewatering integrated machine to control the solid content of sand and gravel cleaning wastewater to be consistent, it is the key to the large-scale application of concrete flushing residual slurry in C40~C80 concrete.

[0004] The Chinese patent with the authorization publication number CN213996248U discloses a sand washing and recycling dehydration all-in-one machine, which comprises a sand washing pool, a sand washing wheel, a transmission mechanism, a motor, a water collecting pool, an elastic assembly and a vibrating screen body, the sand washing wheel is arranged in the sand washing pool, the water collecting pool is located on one side of the sand washing pool, the vibrating screen body is supported on the water collecting pool through four elastic assemblies, and a vibrating motor is arranged on the vibrating screen body; the sand washing and recycling dehydration all-in-one machine further comprises a fine sand recycling device, the fine sand recycling device comprises a stand column, a water tank, a separated liquid discharge pipe, a cyclone separator, a conveying pipeline and a sludge pump, the cyclone separator is fixed on one side of the water tank and located above the vibrating screen body, the water tank is fixed on the stand column, the stand column is fixed on the water collecting pool, one end of the separated liquid discharge pipe is in communication with the water tank, a water discharge pipeline is arranged on the water tank, the other end of the separated liquid discharge pipe is in communication with a liquid output port of the cyclone separator, a fine sand discharge port is arranged at the lower end of the cyclone separator, a sewage input port of the cyclone separator is in communication with one end of the conveying pipeline, and the other end of the conveying pipeline is in communication with a sewage discharge pipe of the sand washing pool, and the sludge pump is installed on the conveying pipeline.

[0005] The prior technical solution has the following defects: the sand washing and recycling dehydration all-in-one machine adopts a motor as a power source to drive the sand washing wheel to rotate, and then drive the wheel bucket to roll and stir the sandstone. Subsequently, the sandstone is conveyed to the vibrating screen body for dehydration treatment. Since there is a certain gap between the inner wall of the sand washing pool and the bottom wall of the sand washing wheel, the wheel bucket can pass through, and only by the rotating power of the sand washing wheel, the sandstone far from the sand washing wheel at the bottom of the sand washing pool is difficult to be touched by the wheel bucket. This leads to the sandstone being easily deposited at the bottom, which not only affects the stirring and cleaning effect of the sandstone, but also may cause the solid content of different batches of sandstone materials after cleaning to be inconsistent, thereby affecting its large-scale application in C40~C80 concrete. Practical new type content

[0006] The problem to be solved by the present application is to provide a sand washing and dehydration all-in-one machine which improves the stirring and cleaning effect of sandstone and controls the solid content in the cleaning wastewater to be about 12~15%wt.

[0007] The above practical new type of the present application is realized through the following technical solutions:

[0008] The application relates to a sand washing and dewatering integrated machine, which comprises a sand washing pool, a self-rotating sand washing wheel installed in the sand washing pool, a dewatering screen arranged downstream of the sand washing pool, a reciprocating driving mechanism arranged on the sand washing pool, a pair of swing rods rotatably connected to the sand washing pool, a first stirring paddle rotatably connected between the pair of swing rods and arranged close to a discharging side of the sand washing pool, a transmission mechanism, a pair of sliding rods slidingly connected to the sand washing pool, and at least two second stirring paddles rotatably connected between the pair of sliding rods and arranged close to a feeding side of the sand washing pool, wherein an output shaft of the reciprocating driving mechanism is arranged at a rotating end of one of the swing rods, and an input shaft of the transmission mechanism is arranged at a rotating end of the other swing rod and a moving end of the transmission mechanism is arranged on one of the sliding rods.

[0009] By adopting the technical scheme, the reciprocating driving mechanism is used for driving the swing rods to rotate and swing in a predetermined angle range, and drives the first stirring paddle to swing below the discharging side of the sand washing wheel; meanwhile, the input shaft of the transmission mechanism is driven to rotate, and the moving end of the transmission mechanism is driven to move, so that the second stirring paddles are obliquely slid below the feeding side of the sand washing wheel; under the interaction of water flow and the first and second stirring paddles, the first and second stirring paddles can rotate along the water flow and the feeding direction; in the actual sand and stone cleaning and dewatering process, the sand and stone is first fed into the sand washing pool from the feeding side of the sand washing wheel; in the process of falling along the inclined inner wall of the feeding side of the sand washing pool, the second stirring paddles are first obliquely moved upwards, so that the sand and stone is forced to be scattered and falls to the bottom of the sand washing pool; then the second stirring paddles are obliquely moved downwards, so that the sand and stone at the bottom of the feeding side of the sand washing pool is rolled; in addition, the first stirring paddle swings below the discharging side of the sand washing wheel to cover the working blind area of the sand washing wheel as much as possible; at the same time, the wheel bucket of the sand washing wheel rotates and contacts the rolled sand and stone to perform preliminary sand and stone scrubbing operation; then the sand and stone is driven by the sand washing wheel from bottom to top to pass through the second stirring paddles again; the excess sand and stone is separated from the sand washing wheel in the turning process, is stirred by the second stirring paddles, and falls into the sand washing pool again; the other sand and stone is continuously ground and cleaned on the sand washing wheel; the clean sand and stone is taken away by the wheel bucket of the sand washing wheel and falls into the dewatering screen from the discharging side of the sand washing wheel; and finally, the dewatering screen is used for dewatering treatment.

[0010] The reciprocating driving mechanism comprises a linear driving element arranged on the sand washing pool, a driving rack arranged at a moving end of the linear driving element and slidingly connected to the sand washing pool, and a driving half gear wheel engaged with the driving rack and rotatably connected to the sand washing pool; and the driving half gear wheel is coaxially connected with the rotating end of one of the swing rods.

[0011] By adopting the above technical scheme, the coaxial connection of the driving half gear and the swing rod ensures the accurate swing of the stirring paddle in the sand washing tank, so that the sand and gravel are uniformly stirred and dispersed in the sand washing tank, which not only improves the sand and gravel cleaning efficiency, but also reduces the loss of sand and gravel in the cleaning process by accurately controlling the movement of the stirring paddle, and is beneficial to controlling the solid content in the cleaning wastewater.

[0012] The utility model further sets up: linear drive spare is set up as linear motor.

[0013] By adopting the above technical scheme, the use of linear motor makes the movement of the driving mechanism more stable and accurate, reduces mechanical wear and maintenance cost, and the high efficiency and fast response characteristics of the linear motor make the whole sand washing and dewatering process more efficient and energy-saving.

[0014] The utility model further sets up: the first stirring paddle includes the first rotary shaft that rotates and is connected between the pair of swing rod, the first strip blade that sets up on the first rotary shaft and arranges along the periphery equidistantly, and first guide surface is set up respectively on the both side surfaces of first strip blade.

[0015] By adopting the above technical scheme, the sand and gravel passing through the first stirring paddle can be fully dispersed.

[0016] The utility model further sets up: the first stirring paddle still includes the first spiral convex strip that sets up on the first rotary shaft.

[0017] By adopting the above technical scheme, the sand and gravel on the surface of the first rotary shaft are guided to move obliquely, avoiding the formation of inertial vortex around the first stirring paddle, and ensuring the stirring effect.

[0018] The utility model further sets up: transmission mechanism includes the driving sprocket and driven sprocket that rotate and are connected on the sand washing tank, the transmission chain that is engaged and is set on the driving sprocket and driven sprocket, the driven half gear that is coaxially arranged on the driven sprocket, and the driven rack that is engaged on the driven half gear, the driving sprocket and the rotation end of another swing rod are coaxially connected, and the driven rack is arranged on one of the sliding rods.

[0019] By adopting the above technical scheme, the structure of the transmission mechanism is more compact, and the transmission efficiency is significantly improved, the meshing transmission of the driving sprocket and the driven sprocket ensures the stability and reliability of power transmission, and at the same time, the cooperation of the driven half gear and the driven rack makes the torque distribution in the transmission process more uniform, thereby reducing the equipment wear caused by uneven transmission.

[0020] The utility model further sets up: the second stirring paddle still includes the second spiral convex strip of setting on the second shaft.

[0021] Through adopting above technical scheme, can promote the sand and stone that passes through second stirring paddle is fully scattered

[0022] The utility model further sets up: the second stirring paddle still includes the second spiral convex strip of setting on the second shaft.

[0023] Through adopting above technical scheme, be used for guiding the sand and stone inclined motion of second shaft surface, avoid forming inertial vortex around second stirring paddle, guarantee stirring effect.

[0024] Summarized above, the beneficial technical effect of the utility model is: the utility model not only improves the working efficiency and stability of sand washing dehydration integrated machine, also reduces energy consumption and maintenance cost, is favorable to improve the stirring cleaning effect of sand and stone, and control the solid content in cleaning waste water is about 12~15%wt, is favorable to the large-scale application of cleaning waste water in C40~C80 concrete. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the front view structural schematic diagram of sand washing dehydration integrated machine of the utility model.

[0026] Figure 2 It is the top view structural schematic diagram of sand washing dehydration integrated machine of the utility model.

[0027] Figure 3 It is the connection relation between reciprocating drive mechanism, swing rod, first stirring paddle, transmission mechanism, sliding rod and second stirring paddle of the utility model.

[0028] In the drawing, 1, sand washing pool;2, sand washing wheel;21, equipment frame;22, frequency conversion motor;23, speed reducer;24, belt transmission pair;3, dehydration screen;4, reciprocating drive mechanism;41, linear drive part;42, driving rack;43, driving half gear;5, swing rod;6, first stirring paddle;61, first shaft;62, first spiral convex strip;63, first strip blade;64, first guide surface;7, transmission mechanism;71, driving sprocket;72, driven sprocket;73, transmission chain;74, driven half gear;75, driven rack;8, sliding rod;9, second stirring paddle;91, second shaft;92, second spiral convex strip;93, second strip blade;94, second guide surface. DETAILED DESCRIPTION

[0029] In order to make the technical means, creation characteristics, achieve purposes and effects of the utility model more clear and easy to understand, the utility model will be further described below in combination with the drawings and specific embodiments.

[0030] With reference to Figure 1 The utility model discloses a sand washing and dehydration all -in -one, including sand washing pool 1, the sand wheel 2 of self -rotation installation in sand washing pool 1 through rotating module, the dehydration screen 3 of arrangement in the downstream of sand washing pool 1, the reciprocating drive mechanism 4 of setting in sand washing pool 1, the pair of swing bar 5 of rotation connection in sand washing pool 1, the first stirring paddle 6 of rotation connection between the pair of swing bar 5 and close to the discharge side arrangement of sand washing pool 1, transmission mechanism 7, the pair of sliding rod 8 of sliding connection in sand washing pool 1 and the pair of second stirring paddle 9 of rotation connection between the pair of sliding rod 8 and close to the feeding side arrangement of sand washing pool 1. Wherein, the output shaft of reciprocating drive mechanism 4 is arranged at the rotating end of one of swing bar 5, and the input shaft of transmission mechanism 7 is arranged at the rotating end of the other swing bar 5, and the moving end is arranged on one of sliding rod 8.

[0031] With reference to Figure 2 To ensure the sand and gravel stirring cleaning effect, the opening of sand washing pool 1 is set to be gradually expanded. Wherein, the tank wall of sand washing pool 1 close to the discharge side of sand wheel 2 is parallel to the vertical plane and arranged with a gap with sand wheel 2, and the tank wall of sand washing pool 1 close to the feeding side of sand wheel 2 is inclined to the vertical plane and arranged with a gap with second stirring paddle 9. In addition, the rotating module comprises a device frame 21 arranged on one side of sand washing pool 1, a variable frequency motor 22 and a speed reducer 23 arranged on the device frame 21, and a belt transmission pair 24 arranged between the output shaft of variable frequency motor 22 and the input shaft of speed reducer 23, and sand wheel 2 is arranged on the output shaft of speed reducer 23.

[0032] With reference to Figure 3 The reciprocating drive mechanism 4 comprises a linear drive 41 (refer to Figure 2 ), a driving rack 42 arranged on the moving end of linear drive 41 and slidingly connected to sand washing pool 1, and a driving half gear 43 engaged with driving rack 42 and rotationally connected to sand washing pool 1. Wherein, the linear drive 41 is set as a linear motor, and the driving half gear 43 and the rotating end of one of the swing bars 5 are coaxially connected. The coaxial connection of the driving half gear 43 and the swing bar 5 ensures the accurate swinging of the stirring paddle in the sand washing pool 1, so that the sand and gravel in the sand washing pool 1 are uniformly stirred and dispersed. This design not only improves the efficiency of sand and gravel cleaning, but also reduces the loss of sand and gravel in the cleaning process by accurately controlling the movement of the stirring paddle, which is conducive to controlling the solid content in the cleaning wastewater.

[0033] The transmission mechanism 7 comprises a driving sprocket 71 rotatably connected to the sand washing tank 1, a driven sprocket 72, a transmission chain 73 sleeved on the driving sprocket 71 and the driven sprocket 72, a driven half gear 74 coaxially arranged on the driven sprocket 72, and a driven rack 75 engaged with the driven half gear 74. The driving sprocket 71 is coaxially connected with the rotating end of the other swing rod 5, and the driven rack 75 is arranged on one of the sliding rods 8. The transmission mechanism 7 has a more compact structure and a significantly improved transmission efficiency. The meshing transmission of the driving sprocket 71 and the driven sprocket 72 ensures the stability and reliability of power transmission. Meanwhile, the use of the driven half gear 74 and the driven rack 75 makes the torque distribution in the transmission process more uniform, thereby reducing the equipment wear caused by uneven transmission.

[0034] In order to improve the cleaning effect, the first stirring paddle 6 comprises a first rotating shaft 61 rotatably connected between the pair of swing rods 5, a first helical protrusion 62 arranged on the first rotating shaft 61, a first strip-shaped blade 63 arranged on the first rotating shaft 61 and arranged at equal intervals in the circumferential direction, and a first guide surface 64 arranged on the two side surfaces of the first strip-shaped blade 63, respectively. Meanwhile, the second stirring paddle 9 comprises a second rotating shaft 91 rotatably connected between the pair of sliding rods 8, a second helical protrusion 92 arranged on the second rotating shaft 91, a second strip-shaped blade 93 arranged on the second rotating shaft 91 and arranged at equal intervals in the circumferential direction, and a second guide surface 94 arranged on the two side surfaces of the second strip-shaped blade 93, respectively.

[0035] The implementation principle of the embodiment is that the reciprocating driving mechanism 4 is used to drive the rotary swing of the swing rod 5 in a predetermined angle range, and drive the swing of the first stirring paddle 6 below the discharge side of the sand washing wheel 2, and at the same time, the input shaft of the transmission mechanism 7 is driven to rotate, and then the moving end of the transmission mechanism 7 is driven to move, so as to realize the oblique sliding of the second stirring paddle 9 below the feeding side of the sand washing wheel 2, and under the interaction of the water flow and the first stirring paddle 6 and the second stirring paddle 9, the first stirring paddle 6 and the second stirring paddle 9 can rotate along the water flow and the feeding direction; in the actual sandstone cleaning and dewatering process, the sandstone is first poured into the sand washing tank 1 from the feeding side of the sand washing wheel 2, and in the process of falling along the inclined inner wall of the feeding side of the sand washing tank 1, the second stirring paddle 9 is first moved obliquely upwards, so as to force the sandstone to be scattered and fall to the bottom of the sand washing tank 1, and then the second stirring paddle 9 is moved obliquely downwards, so as to drive the sandstone at the bottom of the sand washing tank 1 on the feeding side to tumble, in addition, the first stirring paddle 6 swings below the discharge side of the sand washing wheel 2 to cover the working blind area of the sand washing wheel 2 as much as possible, at the same time, the wheel bucket of the sand washing wheel 2 rotates and contacts the tumbling sandstone to perform a preliminary sandstone scrubbing operation, then the sand washing wheel 2 drives the sandstone to pass through the second stirring paddle 9 again from bottom to top, the excess sandstone is separated from the sand washing wheel 2 in the turning process, and after being stirred by the second stirring paddle 9, the sandstone falls into the bottom of the sand washing tank 1 again, and the other sandstone is continuously ground and cleaned on the sand washing wheel 2, the clean sandstone is taken away by the wheel bucket of the sand washing wheel 2 and falls into the dewatering screen 3 from the discharge side of the sand washing wheel 2, and finally the dewatering treatment is performed through the dewatering screen 3.

[0036] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A sand washing and dewatering all-in-one machine, comprising a sand washing pool (1), a sand washing wheel (2) which can rotate and is installed in the sand washing pool (1), and a dewatering screen (3) which is arranged downstream of the sand washing pool (1), characterized in that: The reciprocating driving mechanism (4) is arranged on the sand washing tank (1), a pair of swing rods (5) are rotationally connected to the sand washing tank (1), a first stirring paddle (6) is rotationally connected between the pair of swing rods (5) and arranged close to the discharging side of the sand washing tank (1), a transmission mechanism (7), a pair of sliding rods (8) are slidingly connected to the sand washing tank (1), and at least two second stirring paddles (9) are rotationally connected between the pair of sliding rods (8) and arranged close to the feeding side of the sand washing tank (1), the output shaft of the reciprocating driving mechanism (4) is arranged at the rotating end of one of the swing rods (5), and the input shaft of the transmission mechanism (7) is arranged at the rotating end of the other swing rod (5) and the moving end is arranged on one of the sliding rods (8).

2. The sand washing and dewatering all-in-one machine according to claim 1, characterized in that: The reciprocating driving mechanism (4) comprises a linear driving element (41) arranged on the sand washing tank (1), a driving rack (42) slidingly connected to the sand washing tank (1) and arranged at the moving end of the linear driving element (41), and a driving half gear (43) meshing with the driving rack (42) and rotationally connected to the sand washing tank (1), and the driving half gear (43) is coaxially connected with the rotating end of one of the swing rods (5).

3. The sand washing and dewatering all-in-one machine according to claim 2, characterized in that: The linear driving element (41) is a linear motor.

4. The sand washing and dewatering all-in-one machine according to claim 1, characterized in that: The first stirring paddle (6) comprises a first rotating shaft (61) rotationally connected between the pair of swing rods (5), a first strip-shaped blade (63) arranged on the first rotating shaft (61) and arranged at equal intervals in the circumferential direction, and a first guide surface (64) arranged on the two side surfaces of the first strip-shaped blade (63), respectively.

5. The sand washing and dewatering all-in-one machine according to claim 4, characterized in that: The first stirring paddle (6) further comprises a first helical protrusion (62) arranged on the first rotating shaft (61).

6. The sand washing and dewatering all-in-one machine according to claim 1, characterized in that: The transmission mechanism (7) comprises a driving sprocket (71) and a driven sprocket (72) rotationally connected to the sand washing tank (1), a transmission chain (73) meshing with the driving sprocket (71) and the driven sprocket (72), a driven half gear (74) coaxially arranged on the driven sprocket (72), and a driven rack (75) meshing with the driven half gear (74), the driving sprocket (71) is coaxially connected with the rotating end of the other swing rod (5), and the driven rack (75) is arranged on one of the sliding rods (8).

7. The sand washing and dewatering all-in-one machine according to claim 1, characterized in that: The second stirring paddle (9) comprises a second rotating shaft (91) rotationally connected between the pair of sliding rods (8), a second strip-shaped blade (93) arranged on the second rotating shaft (91) and arranged at equal intervals in the circumferential direction, and a second guide surface (94) arranged on the two side surfaces of the second strip-shaped blade (93), respectively.

8. The sand washing and dewatering all-in-one machine according to claim 7, characterized in that: The second stirring paddle (9) further comprises a second helical protrusion (92) arranged on the second rotating shaft (91).

Images