A multilayer sand filter tank for preparing dinitrochlorobenzene and a method of using the same

Abstract

The invention discloses a multi-layer sand filter tank for preparing dinitrochlorobenzene and a use method thereof, and relates to the technical field of filtering equipment. The multi-layer sand filter tank comprises a bottom plate and side plates symmetrically fixed on both sides of the top of the bottom plate, wherein an upper box body is installed on the inner sides of the two side plates, and a lower box body is fixedly connected to the bottom of the upper box body, and further comprises: a stirring component arranged inside the lower box body, and a positioning component is arranged in the middle of the inner side of the side plate; a filter screen layer, wherein a placement box is installed at the inner connection between the upper box body and the water inlet pipe, the interior of the placement box is filled with filtering sand material, and the inner side wall of the placement box is evenly and fixedly connected with protrusions, so as to solve the problem that when the device is backwashing, the cleaning effect of the sand material accumulated on the bottom layer is relatively general during backwashing, and when the device is used for filtering, the static filtration through the flow of the water body to be treated is only required for a long time, and the filtering effect is not high.

Description

Technical Field

[0001] The invention relates to the technical field of filtering equipment, in particular to a multi-layer sand filter tank for preparing dinitrochlorobenzene and a use method thereof. Background Art

[0002] The preparation of dinitrochlorobenzene requires a sand filter tank, which is a filter filled with filter sand. The water to be filtered is passed into the sand filter tank. When the water passes through the filter sand, some impurities in the water are filtered out by the filter sand. The filtered water is then discharged from the sand filter tank, thus completing the filtration.

[0003] For example, a sand filter tank that is easy to clean and has a publication number of CN210946275U comprises a tank body, a cap disposed above the tank body and a filter assembly disposed in the tank body, the cap is provided with a water inlet, the bottom is provided with a water outlet, the cap and the tank body are detachably connected, the filter assembly comprises a support frame disposed on the tank body and a filter box placed on the support frame, the filter box is filled with filter filler, the filter box is a water-permeable structure, and a lifting ear is provided on the upper part of the filter box. By setting the cap to be detachable and separating the filter assembly from the tank body, it is convenient to clean the inside of the tank body after a period of use, and there is no need to spend the cost of excessive sealing, so it is easy to use and low in cost. However, when the filter assembly of the device is backwashed, the position of the sand inside is fixed, and it is difficult to effectively clean the sand accumulated on the bottom layer during backwashing, and the cleaning effect is general. When the device is used for filtering, it only passes the water to be treated through the filter assembly for static filtration, which requires a long time and the filtering effect is not high, which has certain defects.

[0004] Therefore, we propose a multi-layer sand filter tank and a method for using it for preparing dinitrochlorobenzene, so as to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a multi-layer sand filter tank for preparing dinitrochlorobenzene and a method for using the same, so as to solve the problem that when the device is backwashing, the sand material accumulated on the bottom layer is not cleaned well during backwashing, and when the device is used for filtering, it only performs static filtration through the flow of water to be treated, which takes a long time and has a low filtering effect.

[0006] To achieve the above object, the present invention provides the following technical solution: a multi-layer sand filter tank for preparing dinitrochlorobenzene and a method for using the same, comprising a bottom plate and side plates symmetrically fixed on both sides of the top of the bottom plate, an upper box body being installed on the inner sides of the two side plates, and a lower box body being fixedly connected to the bottom of the upper box body;

[0007] Also includes:

[0008] A water inlet pipe is installed in the middle of the top of the upper box body, the water inlet pipe is connected to the upper box body, and the bottom of the lower box body is symmetrically connected to a drain pipe;

[0009] A stirring assembly is arranged inside the lower box body, and a positioning assembly is arranged in the middle of the inner part of the side plate;

[0010] The filter layer is fixedly installed on the upper part of the upper box body. A placement box is installed at the inner connection between the upper box body and the water inlet pipe. Holes are opened on the top and bottom of the placement box. The inside of the placement box is filled with filter sand. The inner wall of the placement box is evenly fixedly connected with bumps.

[0011] The stirring assembly comprises an installation box, the installation box is fixedly connected to the middle of the bottom of the lower box body, a driving motor is fixedly installed in the middle of the bottom of the lower box body, the output end of the driving motor is fixedly connected to the main rotating shaft, the top end of the main rotating shaft is fixedly connected to the top block, the middle outer side of the main rotating shaft is fixedly connected to the main pulley, one side of the inner top surface of the installation box is rotatably connected to the driven shaft, the bottom end of the driven shaft is fixedly connected to the slave pulley, and the main pulley is adaptively connected to the slave pulley through a belt;

[0012] The upper outer side of the driven shaft is fixedly connected with a main gear, the top of the mounting box is rotatably connected with a sleeve, the outer side of the sleeve is fixedly connected with a slave gear, the main gear is meshed with the slave gear, the sleeve is located on one side of the driven shaft, an upper rod is installed on the inner side of the sleeve, the bottom end of the upper rod is fixedly connected with a bottom block, a sliding rod is symmetrically fixed with a bottom of the bottom block, the sliding rod is slidably connected with the top block, a connecting block is slidably connected to the middle part of the outer side of the bottom block, and one end of the connecting block is fixedly connected with an adjusting sleeve;

[0013] The top end of the sleeve is fixedly connected to the placement box, the top end of the upper rod is fixedly connected to a stirring rod, the adjustment sleeve is located on the outside of the driven shaft, the adjustment sleeve is located between the main gear and the slave pulley, a limit block is fixed on the outside of the driven shaft, an adjustment groove is opened in the middle of the inner side of the adjustment sleeve, the adjustment groove is a wave-shaped circle, and the limit block is rotatably connected to the adjustment groove;

[0014] The positioning assembly comprises a fixed rod and a rotating disk. The fixed rod is symmetrically arranged on both sides of the upper box body. One end of the fixed rod is fixedly connected to the upper box body, and the other end of the fixed rod is fixedly connected to the rotating disk.

[0015] Preferably, an adaptor groove is provided at the connection between the upper box body and the lower box body, a mounting ring is fixedly connected to the outer side of the placement box, the mounting ring is rotatably connected to the adaptor groove, support blocks are symmetrically installed on the upper and lower sides of the placement box, the support blocks are fitted with the placement box, the two support blocks are respectively fixedly connected to the upper box body and the lower box body, the main rotating shaft is rotatably connected to the lower box body, the top block is fitted with the bottom block, and the sleeve is located above the bottom block.

[0016] By adopting the above technical solution, a stirring assembly is provided, and the stirring rod cooperates with the protrusion on the inside of the placement box to disturb the filter sand, and the adjustment sleeve drives the bottom block to move up and down through the connecting block, so that the stirring rod will also disturb up and down while rotating, thereby reducing the blockage of the filter sand and improving the filtration efficiency.

[0017] Preferably, two sliding rods are symmetrically arranged, an annular step groove is formed on the outer ring of the bottom block, one end of the connecting block is located inside the annular step groove, and the connecting block is slidably connected to the annular step groove.

[0018] By adopting the above technical solution and setting the annular step groove, the connecting block will not fall off from the bottom block.

[0019] Preferably, the stirring rods are symmetrically arranged, and there are no less than four of them. Air holes are opened inside the stirring rods, and the air holes are opened evenly. The limit blocks are symmetrically arranged, and there are two limit blocks.

[0020] By adopting the above technical solution, the air holes are used to filter the passage of sand materials, thereby reducing the rotation resistance of the stirring rod.

[0021] Preferably, the rotating disk is rotatably connected to the side plate, a positioning block is fixedly connected to the side of the rotating disk away from the fixing rod, a mounting block is fixedly connected to the upper part of the side of the side plate away from the upper box body, and a positioning pin is installed inside the mounting block.

[0022] By adopting the above technical solution, during backwashing, the positioning pins on both sides are pulled out of the positioning holes, and then the upper box body is rotated 180 degrees so that the water inlet pipe faces downward and the drain pipe faces upward, which is convenient for flushing the internal filter sand.

[0023] Preferably, the positioning pin is slidably connected to the mounting block, and a positioning hole is vertically opened inside the positioning block.

[0024] By adopting the above technical solution, the positioning pin is inserted into the positioning hole to position the rotating disk and the fixing rod, thereby positioning the upper box body.

[0025] Preferably, the positioning hole passes through the entire positioning block, and the positioning pin is engaged and connected with the positioning hole.

[0026] A method for using a multi-layer sand filter tank for preparing dinitrochlorobenzene, the steps of use are as follows:

[0027] Step 1: Install the mounting ring on the outside of the placement box in the adapter groove at the connection between the upper box and the lower box, and then fix the lower box to the bottom of the upper box by bolts. The inside of the placement box is filled with filter sand. The dinitrochlorobenzene to be treated is input through the water inlet pipe, initially filtered by the filter layer, and then flows into the filter sand through the holes on the placement box for re-filtration;

[0028] Step 2: Start the driving motor and rotate it slowly. The driving motor drives the main shaft to rotate, the main shaft drives the top block to rotate, the top block drives the bottom block to rotate through the sliding rod, and the bottom block drives the stirring rod to rotate through the upper rod; the main shaft drives the main pulley to rotate, the main pulley drives the slave pulley to rotate through the belt, the slave pulley drives the driven shaft and the main gear to rotate, the main gear drives the sleeve to rotate through the slave gear, the sleeve drives the placement box to rotate, the placement box and the stirring rod rotate in opposite directions, and the stirring rod cooperates with the convex block inside the placement box to disturb the filtered sand;

[0029] Step 3: At this time, the driven shaft drives the limit block to rotate inside the adjustment groove. The adjustment groove is set in a wave shape, so that the adjustment sleeve moves up and down. The adjustment sleeve drives the bottom block to move up and down through the connecting block, so that the stirring rod will also be disturbed up and down while rotating. The filtered dinitrochlorobenzene is discharged and collected from the drain pipe;

[0030] Step 4: During backwashing, pull the positioning pins on both sides to make them come out of the positioning holes, then rotate the upper box body 180 degrees. The upper box body drives the fixing rod and the rotating disk to rotate, and the rotating disk drives the positioning block to rotate, so that the water inlet pipe faces downward and the drain pipe faces upward. After adjustment, insert the positioning pins into the positioning holes to complete the flipping of the upper box body. At this time, flush with water through the drain pipe, and start the drive motor to rotate faster. The rotation of the stirring rod and the placement box is coordinated to reduce the accumulation of filtered sand during flushing.

[0031] Compared with the prior art, the invention has the following beneficial effects: a stirring assembly is provided, the stirring rod cooperates with the convex block inside the placement box to disturb the filter sand material, and the adjustment sleeve drives the bottom block to move up and down through the connecting block, so that the stirring rod will also disturb up and down while rotating, thereby reducing the blockage of the filter sand material and improving the filtering efficiency;

[0032] 1. A stirring assembly is provided. The mounting ring on the outside of the placement box is installed in the adapter groove at the connection between the upper box body and the lower box body, and then the lower box body is fixed to the bottom of the upper box body by bolts. The inside of the placement box is filled with filter sand. The dinitrochlorobenzene to be treated is input through the water inlet pipe, preliminarily filtered by the filter layer, and then flows into the filter sand through the holes on the placement box for re-filtration. At the same time, the drive motor is started to rotate slowly, the drive motor drives the main shaft to rotate, the main shaft drives the top block to rotate, the top block drives the bottom block to rotate through the sliding rod, and the bottom block drives the stirring rod to rotate through the upper rod; the main shaft drives the main pulley to rotate, the main pulley drives the slave pulley to rotate through the belt, the slave pulley drives the driven shaft and the main gear to rotate, and the main gear The sleeve is driven to rotate by the slave gear, and the sleeve drives the placement box to rotate, and the placement box and the stirring rod rotate in opposite directions. The stirring rod cooperates with the convex block on the inner side of the placement box to disturb the filter sand material, and the driven shaft drives the limit block to rotate inside the adjustment groove. The adjustment groove is arranged in a wave shape, so that the adjustment sleeve moves up and down. The adjustment sleeve drives the bottom block to move up and down through the connecting block. One end of the connecting block is located inside the bottom block, similar to a step groove, so that the connecting block will not fall off the bottom block. The stirring rod will also disturb up and down while rotating, thereby reducing the blockage of the filter sand material and improving the filtering efficiency. This solves the problem that when the device is used for filtering, it only requires static filtering through the flow of the water body to be treated, which takes a long time and has a low filtering effect.

[0033] 2. A positioning assembly is provided. During backwashing, the positioning pins on both sides are pulled out of the positioning holes, and then the upper box is rotated 180 degrees. The upper box drives the fixing rod and the rotating disk to rotate, and the rotating disk drives the positioning block to rotate, so that the water inlet pipe faces downward and the drain pipe faces upward. After adjustment, the positioning pins are inserted into the positioning holes to complete the flipping of the upper box. At this time, water is fed in through the drain pipe for flushing, and the drive motor is started to rotate faster at the same time. The rotation of the stirring rod and the placement box is coordinated to reduce the accumulation of filter sand during flushing, and there is no need to frequently remove the filter assembly for cleaning, which improves the cleaning efficiency and solves the problem that when the device is used for filtering, it only requires static filtration through the flow of the water to be treated, which takes a long time and has a low filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the three-dimensional overall structure of the present invention;

[0035] Figure 2 It is a schematic diagram of the cross-sectional structure of the upper box body and the lower box body of the present invention;

[0036] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0037] Figure 4 This is a schematic diagram of the cross-sectional structure of the installation box of the present invention;

[0038] Figure 5 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0039] Figure 6 This is a schematic diagram of the cross-sectional structure of the adjustment sleeve of the present invention;

[0040] Figure 7 For the present invention Figure 6 The enlarged structural diagram at C in the middle;

[0041] Figure 8 This is a schematic diagram of the structure of the regulating tank of the present invention;

[0042] Fig. 9 This is a schematic diagram of the stirring rod height increase of the present invention;

[0043] Fig.10 It is a schematic diagram of the structure of the positioning component of the present invention.

[0044] In the figure: 1, bottom plate; 2, side plate; 3, upper box body; 4, water inlet pipe; 5, lower box body; 6, drain pipe; 7, stirring assembly; 71, installation box; 72, driving motor; 73, main rotating shaft; 74, top block; 75, main pulley; 76, driven shaft; 77, slave pulley; 78, main gear; 79, sleeve; 710, slave gear; 711, bottom block; 712, slide bar; 713, connecting block; 714, adjusting sleeve; 715, stirring rod; 716, limit block; 717, adjusting slot; 718, upper rod; 8, positioning assembly; 81, fixing rod; 82, rotating disk; 83, positioning block; 84, installation block; 85, positioning pin; 86, positioning hole; 9, filter layer; 10, placement box; 11, support block; 12, adapter slot; 13, installation ring; 14, bump. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] See also Figure 1-Figure 10 The present invention provides a technical solution: a multi-layer sand filter tank for preparing dinitrochlorobenzene, comprising a bottom plate 1 and side plates 2 symmetrically fixed on both sides of the top of the bottom plate 1, an upper box body 3 is installed on the inner sides of the two side plates 2, and a lower box body 5 is fixedly connected to the bottom of the upper box body 3;

[0047] The water inlet pipe 4 is installed in the middle of the top of the upper box body 3, and the water inlet pipe 4 is connected to the upper box body 3 through the bottom of the lower box body 5. The drain pipe 6 is symmetrically connected to the bottom of the lower box body 5;

[0048] A stirring assembly 7 is arranged inside the lower box 5;

[0049] The filter layer 9 is fixedly installed on the upper part of the upper box body 3. A placement box 10 is installed at the inner connection between the upper box body 3 and the water inlet pipe 4. Holes are opened on the top and bottom of the placement box 10. The inside of the placement box 10 is filled with filter sand. The inner wall of the placement box 10 is evenly fixedly connected with a protrusion 14.

[0050] An adapting groove 12 is provided at the connection between the upper box body 3 and the lower box body 5, and a mounting ring 13 is fixedly connected to the outer side of the placement box 10, and the mounting ring 13 is rotatably connected to the adapting groove 12, and support blocks 11 are symmetrically installed on the upper and lower sides of the placement box 10, and the support blocks 11 are fitted with the placement box 10. The two support blocks 11 are fixedly connected to the upper box body 3 and the lower box body 5 respectively, the main rotating shaft 73 is rotatably connected to the lower box body 5, the top block 74 is fitted with the bottom block 711, and the sleeve 79 is located above the bottom block 711.

[0051] The stirring assembly 7 includes an installation box 71, which is fixedly connected to the middle of the bottom of the lower box body 5. A driving motor 72 is fixedly installed in the middle of the bottom of the lower box body 5. The output end of the driving motor 72 is fixedly connected to a main rotating shaft 73, the top of the main rotating shaft 73 is fixedly connected to a top block 74, and the middle outer side of the main rotating shaft 73 is fixedly connected to a main pulley 75. A driven shaft 76 is rotatably connected to one side of the inner top surface of the installation box 71, and a slave pulley 77 is fixedly connected to the bottom end of the driven shaft 76. The main pulley 75 is adaptively connected to the slave pulley 77 through a belt.

[0052] A main gear 78 is fixedly connected to the outer side of the upper part of the driven shaft 76, and a sleeve 79 is rotatably connected to the top of the mounting box 71. A slave gear 710 is fixedly connected to the outer side of the sleeve 79. The main gear 78 is meshed with the slave gear 710. The sleeve 79 is located on one side of the driven shaft 76. An upper rod 718 is installed on the inner side of the sleeve 79. The bottom end of the upper rod 718 is fixedly connected to a bottom block 711. A sliding rod 712 is symmetrically fixed to the bottom of the bottom block 711. The sliding rod 712 is slidably connected to the top block 74. A connecting block 713 is slidably connected to the middle part of the outer side of the bottom block 711, and one end of the connecting block 713 is fixedly connected to an adjusting sleeve 714.

[0053] Two sliding rods 712 are symmetrically arranged. An annular step groove is formed on the outer ring of the bottom block 711. One end of the connecting block 713 is located inside the annular step groove. The connecting block 713 is slidably connected to the annular step groove.

[0054] The top of the sleeve 79 is fixedly connected to the placement box 10, the top of the upper rod 718 is fixedly connected to the stirring rod 715, the adjusting sleeve 714 is located on the outside of the driven shaft 76, the adjusting sleeve 714 is located between the main gear 78 and the slave pulley 77, a limiting block 716 is fixed on the outside of the driven shaft 76, and an adjusting groove 717 is opened in the middle of the inner side of the adjusting sleeve 714, the adjusting groove 717 is a wavy circle, and the limiting block 716 is rotatably connected to the adjusting groove 717.

[0055] The stirring rods 715 are symmetrically arranged, and there are no less than four stirring rods 715 . Air holes are opened inside the stirring rods 715 , and the air holes are opened evenly. The limit blocks 716 are symmetrically arranged, and there are two limit blocks 716 .

[0056] Embodiment 1: Figure 2-Figure 9 As shown, a stirring assembly 7 is provided, and the mounting ring 13 on the outside of the placement box 10 is installed in the adapter groove 12 at the connection between the upper box body 3 and the lower box body 5, and then the lower box body 5 is fixed to the bottom of the upper box body 3 by bolts. The interior of the placement box 10 is filled with filter sand, and the dinitrochlorobenzene to be treated is input through the water inlet pipe 4, preliminarily filtered by the filter layer 9, and then flows into the filter sand through the holes on the placement box 10 for re-filtration.

[0057] At the same time, the drive motor 72 is started to rotate slowly, the drive motor 72 drives the main shaft 73 to rotate, the main shaft 73 drives the top block 74 to rotate, the top block 74 drives the bottom block 711 to rotate through the slide bar 712, and the bottom block 711 drives the stirring rod 715 to rotate through the upper rod 718; the main shaft 73 drives the main pulley 75 to rotate, the main pulley 75 drives the slave pulley 77 to rotate through the belt, the slave pulley 77 drives the driven shaft 76 and the main gear 78 to rotate, the main gear 78 drives the sleeve 79 to rotate through the slave gear 710, and the sleeve 79 drives the placement box 10 to rotate.

[0058] The placement box 10 and the stirring rod 715 rotate in opposite directions. The stirring rod 715 cooperates with the protrusion 14 on the inner side of the placement box 10 to disturb the filter sand material, and the driven shaft 76 drives the limit block 716 to rotate inside the adjustment groove 717. The adjustment groove 717 is arranged in a wave shape, so that the adjustment sleeve 714 moves up and down. The adjustment sleeve 714 drives the bottom block 711 to move up and down through the connecting block 713. One end of the connecting block 713 is located inside the bottom block 711, similar to a step groove, so that the connecting block 713 will not fall off the bottom block 711. The stirring rod 715 will also disturb up and down while rotating, thereby reducing the blockage of the filter sand material and improving the filtering efficiency. This solves the problem that when the device is used for filtering, it only requires static filtering through the flow of the water body to be treated, which takes a long time and has a low filtering effect.

[0059] A positioning assembly 8 is arranged in the middle of the side panel 2, and the positioning assembly 8 includes a fixed rod 81 and a rotating disk 82. The fixed rod 81 is symmetrically arranged on both sides of the upper box body 3, one end of the fixed rod 81 is fixedly connected to the upper box body 3, and the other end of the fixed rod 81 is fixedly connected to the rotating disk 82.

[0060] The rotating disk 82 is rotatably connected to the side plate 2 . A positioning block 83 is fixedly connected to the side of the rotating disk 82 away from the fixing rod 81 . A mounting block 84 is fixedly connected to the upper part of the side plate 2 away from the upper box body 3 . A positioning pin 85 is installed inside the mounting block 84 .

[0061] The positioning pin 85 is slidably connected to the mounting block 84 . A positioning hole 86 is vertically opened inside the positioning block 83 . The positioning hole 86 runs through the entire positioning block 83 . The positioning pin 85 is engaged and connected with the positioning hole 86 .

[0062] Embodiment 2: Figure 1 and Fig.10 As shown, a positioning assembly 8 is provided. During backwashing, the positioning pins 85 on both sides are pulled so that the positioning pins 85 are disengaged from the positioning holes 86, and then the upper box body 3 is rotated one hundred and eighty degrees. The upper box body 3 drives the fixing rod 81 and the rotating disk 82 to rotate, and the rotating disk 82 drives the positioning block 83 to rotate, so that the water inlet pipe 4 faces downward and the drain pipe 6 faces upward. After adjustment, the positioning pins 85 are inserted into the positioning holes 86 to complete the flipping of the upper box body 3. At this time, water is fed in through the drain pipe 6 for flushing, and the drive motor 72 is started to rotate faster at the same time. The rotation cooperation of the stirring rod 715 and the placement box 10 reduces the accumulation of filter sand during flushing, and there is no need to frequently remove the filter assembly for cleaning, thereby improving the cleaning efficiency. This solves the problem that when the device is used for filtering, it only requires static filtration through the flow of the water body to be treated, which takes a long time and has a low filtering effect.

[0063] Working principle: When using the device, first, Figure 1-Figure 10 As shown, the mounting ring 13 on the outside of the placement box 10 is installed in the adapter groove 12 at the connection between the upper box body 3 and the lower box body 5, and then the lower box body 5 is fixed to the bottom of the upper box body 3 by bolts. The inside of the placement box 10 is filled with filter sand, and the dinitrochlorobenzene to be treated is input through the water inlet pipe 4, preliminarily filtered by the filter layer 9, and then flows into the filter sand through the holes on the placement box 10 for re-filtration.

[0064] Start the driving motor 72 and rotate it slowly. The driving motor 72 drives the main rotating shaft 73 to rotate. The main rotating shaft 73 drives the top block 74 to rotate. The top block 74 drives the bottom block 711 to rotate through the sliding rod 712. The bottom block 711 drives the stirring rod 715 to rotate through the upper rod 718; the main rotating shaft 73 drives the main pulley 75 to rotate. The main pulley 75 drives the slave pulley 77 to rotate through the belt. The slave pulley 77 drives the driven shaft 76 and the main gear 78 to rotate. The main gear 78 drives the sleeve 79 to rotate through the slave gear 710. The sleeve 79 drives the placement box 10 to rotate. The placement box 10 and the stirring rod 715 rotate in opposite directions. The stirring rod 715 cooperates with the protrusion 14 on the inner side of the placement box 10 to disturb the filtered sand.

[0065] The driven shaft 76 drives the limit block 716 to rotate inside the adjusting groove 717. The adjusting groove 717 is arranged in a wave shape, so that the adjusting sleeve 714 moves up and down. The adjusting sleeve 714 drives the bottom block 711 to move up and down through the connecting block 713, so that the stirring rod 715 will also be disturbed up and down while rotating. The filtered dinitrochlorobenzene is discharged and collected from the drain pipe 6.

[0066] During backwashing, the positioning pins 85 on both sides are pulled out of the positioning holes 86, and then the upper box body 3 is rotated one hundred and eighty degrees. The upper box body 3 drives the fixing rod 81 and the rotating disk 82 to rotate, and the rotating disk 82 drives the positioning block 83 to rotate, so that the water inlet pipe 4 faces downward and the drain pipe 6 faces upward. After adjustment, the positioning pins 85 are inserted into the positioning holes 86 to complete the flipping of the upper box body 3. At this time, water is flushed through the drain pipe 6, and the drive motor 72 is started to rotate faster. The rotation coordination of the stirring rod 715 and the placement box 10 reduces the accumulation of filtered sand during flushing.

[0067] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0068] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-layer sand filter tank for preparing dinitrochlorobenzene, comprising a bottom plate (1) and side plates (2) symmetrically fixed on both sides of the top of the bottom plate (1), an upper box (3) being installed on the inner sides of the two side plates (2), and a lower box (5) being fixedly connected to the bottom of the upper box (3); It is characterized in that Also includes: A water inlet pipe (4) is installed in the middle of the top of the upper box body (3), the water inlet pipe (4) is connected to the upper box body (3), and the bottom of the lower box body (5) is symmetrically connected to a drainage pipe (6); A stirring assembly (7) is arranged inside the lower box body (5), and a positioning assembly (8) is arranged in the middle of the side plate (2); The filter layer (9) is fixedly mounted on the upper part of the upper box body (3); a placement box (10) is installed at the inner connection between the upper box body (3) and the water inlet pipe (4); holes are provided at the top and bottom of the placement box (10); the interior of the placement box (10) is filled with filter sand; and the inner wall of the placement box (10) is evenly and fixedly connected with a protrusion (14); The stirring assembly (7) comprises a mounting box (71), the mounting box (71) being fixedly connected to the middle of the bottom of the lower box body (5), a driving motor (72) being fixedly installed in the middle of the bottom of the lower box body (5), an output end of the driving motor (72) being fixedly connected to a main rotating shaft (73), a top block (74) being fixedly connected to the top of the main rotating shaft (73), a main pulley (75) being fixedly connected to the outer side of the middle of the main rotating shaft (73), a driven shaft (76) being rotatably connected to one side of the inner top surface of the mounting box (71), a driven pulley (77) being fixedly connected to the bottom end of the driven shaft (76), and the main pulley (75) being adaptively connected to the driven pulley (77) via a belt; The upper outer side of the driven shaft (76) is fixedly connected to a main gear (78); the top of the mounting box (71) is rotatably connected to a sleeve (79); the outer side of the sleeve (79) is fixedly connected to a slave gear (710); the main gear (78) is meshingly connected to the slave gear (710); the sleeve (79) is located on one side of the driven shaft (76); an upper rod (718) is installed on the inner side of the sleeve (79); the bottom end of the upper rod (718) is fixedly connected to a bottom block (711); a sliding rod (712) is symmetrically fixed to the bottom of the bottom block (711); the sliding rod (712) is slidably connected to the top block (74); a connecting block (713) is slidably connected to the middle of the outer side of the bottom block (711); one end of the connecting block (713) is fixedly connected to an adjustment sleeve (714); The top end of the sleeve (79) is fixedly connected to the placement box (10), the top end of the upper rod (718) is fixedly connected to a stirring rod (715), the adjustment sleeve (714) is located on the outside of the driven shaft (76), the adjustment sleeve (714) is located between the main gear (78) and the slave pulley (77), a limit block (716) is fixed on the outside of the driven shaft (76), an adjustment groove (717) is provided in the middle of the inner side of the adjustment sleeve (714), the adjustment groove (717) is a wave-shaped circle, and the limit block (716) is rotatably connected to the adjustment groove (717); The positioning assembly (8) comprises a fixed rod (81) and a rotating disk (82), wherein the fixed rod (81) is symmetrically arranged on both sides of the upper box body (3), one end of the fixed rod (81) is fixedly connected to the upper box body (3), and the other end of the fixed rod (81) is fixedly connected to the rotating disk (82).

2. A multi-layer sand filter tank for preparing dinitrochlorobenzene according to claim 1, characterized in that: An adapting groove (12) is provided at the connection between the upper box body (3) and the lower box body (5); a mounting ring (13) is fixedly connected to the outer side of the placement box (10); the mounting ring (13) is rotatably connected to the adapting groove (12); support blocks (11) are symmetrically installed on the upper and lower sides of the placement box (10); the support blocks (11) are fitted with the placement box (10); the two support blocks (11) are fixedly connected to the upper box body (3) and the lower box body (5) respectively; the main rotating shaft (73) is rotatably connected to the lower box body (5); the top block (74) is fitted with the bottom block (711); and the sleeve (79) is located above the bottom block (711).

3. A multi-layer sand filter tank for preparing dinitrochlorobenzene according to claim 2, characterized in that: Two sliding rods (712) are symmetrically arranged. An annular step groove is formed on the outer ring of the bottom block (711). One end of the connecting block (713) is located inside the annular step groove. The connecting block (713) is slidably connected to the annular step groove.

4. A multi-layer sand filter tank for preparing dinitrochlorobenzene according to claim 3, characterized in that: The stirring rods (715) are symmetrically arranged, and there are no less than four stirring rods (715). Air holes are provided inside the stirring rods (715), and the air holes are evenly arranged. The limit blocks (716) are symmetrically arranged, and there are two limit blocks (716).

5. A multi-layer sand filter tank for preparing dinitrochlorobenzene according to claim 4, characterized in that: The rotating disk (82) is rotatably connected to the side plate (2); a positioning block (83) is fixedly connected to a side of the rotating disk (82) away from the fixing rod (81); a mounting block (84) is fixedly connected to an upper portion of a side of the side plate (2) away from the upper box body (3); and a positioning pin (85) is installed inside the mounting block (84).

6. A multi-layer sand filter tank for preparing dinitrochlorobenzene according to claim 5, characterized in that: The positioning pin (85) is slidably connected to the mounting block (84), and a positioning hole (86) is vertically opened inside the positioning block (83).

7. A multi-layer sand filter tank for preparing dinitrochlorobenzene according to claim 6, characterized in that: The positioning hole (86) passes through the entire positioning block (83), and the positioning pin (85) is engaged and connected with the positioning hole (86).

8. A method for using a multi-layer sand filter tank for preparing dinitrochlorobenzene, using the multi-layer sand filter tank for preparing dinitrochlorobenzene as claimed in claim 7, and the steps of the method are as follows: Step 1: Install the mounting ring (13) on the outside of the placement box (10) in the adapter groove (12) at the connection between the upper box body (3) and the lower box body (5), and then fix the lower box body (5) to the bottom of the upper box body (3) by bolts. The placement box (10) is filled with filter sand. The dinitrochlorobenzene to be treated is input through the water inlet pipe (4), initially filtered by the filter layer (9), and then flows into the filter sand through the holes on the placement box (10) for re-filtration; Step 2: Start the driving motor (72) to rotate slowly, the driving motor (72) drives the main rotating shaft (73) to rotate, the main rotating shaft (73) drives the top block (74) to rotate, the top block (74) drives the bottom block (711) to rotate through the sliding rod (712), the bottom block (711) drives the stirring rod (715) to rotate through the upper rod (718); the main rotating shaft (73) drives the main pulley (75) to rotate, the main pulley (75) drives the slave pulley (77) to rotate through the belt, the slave pulley (77) drives the driven shaft (76) and the main gear (78) to rotate, the main gear (78) drives the sleeve (79) to rotate through the slave gear (710), the sleeve (79) drives the placement box (10) to rotate, the placement box (10) and the stirring rod (715) rotate in opposite directions, and the stirring rod (715) cooperates with the protrusion (14) on the inner side of the placement box (10) to disturb the filtered sand material; Step 3: At this time, the driven shaft (76) drives the limit block (716) to rotate inside the adjustment groove (717). The adjustment groove (717) is arranged in a wave shape, so that the adjustment sleeve (714) moves up and down. The adjustment sleeve (714) drives the bottom block (711) to move up and down through the connecting block (713), so that the stirring rod (715) rotates and also disturbs up and down. The filtered dinitrochlorobenzene is discharged and collected from the drain pipe (6); Step 4: During backwashing, the positioning pins (85) on both sides are pulled out so that the positioning pins (85) are disengaged from the positioning holes (86), and then the upper box body (3) is rotated 180 degrees. The upper box body (3) drives the fixing rod (81) and the rotating disk (82) to rotate, and the rotating disk (82) drives the positioning block (83) to rotate, so that the water inlet pipe (4) faces downward and the drain pipe (6) faces upward. After adjustment, the positioning pins (85) are inserted into the positioning holes (86) to complete the flipping of the upper box body (3). At this time, water is introduced through the drain pipe (6) for flushing, and the drive motor (72) is started to rotate at the same time. The accumulation of filter sand during flushing is reduced by the rotation cooperation of the stirring rod (715) and the placement box (10).

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