A sand filter device for thiourea synthetic liquid

Abstract

The present invention relates to the technical field of sand filter devices, and discloses a sand filter device for thiourea synthetic liquid, comprising a device body for filtering the thiourea synthetic liquid, the device body comprising a tank body, a first filter plate and a second filter plate are installed in the tank body, and a sand storage chamber is provided between the first filter plate and the second filter plate; a spoiler assembly, the spoiler assembly comprising a boss connected to the tank body by a bearing, and a connecting column is installed on the boss, a plurality of brackets are distributed in an annular manner on the connecting column, and a second nozzle is connected to the bracket by a bearing. The present invention drives the second nozzle to swing up and down, utilizes the swinging motion of the second nozzle, controls the thiourea synthetic liquid to be evenly distributed on the second filter plate, and interferes with the flow of the thiourea synthetic liquid, thereby improving the filtering effect of the thiourea synthetic liquid, and avoiding the thiourea synthetic liquid from being concentrated and accumulated at a certain point on the second filter plate, causing the second filter plate to be locally overused and blocked by impurities.

Description

Technical Field

[0001] The invention relates to the technical field of sand filter devices, and more specifically to a sand filter device for thiourea synthetic liquid. Background Art

[0002] In the thiourea synthesis process, in addition to thiourea, some by-products and impurities are also produced. These impurities include unreacted raw materials, decomposition products, catalyst residues, etc. The presence of these impurities will affect the quality of the thiourea solution. If it is not filtered, it will cause problems in subsequent use, such as clogging the filter, affecting product quality, affecting equipment performance, etc.

[0003] Specifically, the sand filled in the sand filter has a large surface area and pore structure, as well as a physical filtration mechanism, which can block larger impurity particles and trap the impurities in the sand layer, while the clean solution flows out through the sand layer. Among them, for some applications, such as pharmaceuticals and fine chemicals, high-purity thiourea solution is essential. Sand filtration can effectively remove impurities in the solution, improve the purity of the thiourea solution, and make the final product purer.

[0004] When sand filtering thiourea synthetic liquid, the unevenness of liquid flow will cause the synthetic liquid to concentrate in certain areas of the sand layer, forming local excess liquid accumulation. Local overload will cause the filtration efficiency of the sand layer to decrease, resulting in excessive liquid failing to pass through the sand layer evenly, and thus failing to effectively intercept impurities. In addition, overload in certain areas of the sand layer will reduce the filtration effect and affect the overall filtration efficiency, resulting in more impurities not being effectively removed. Summary of the invention

[0005] The present invention provides a sand filter device for thiourea synthetic liquid, which solves the technical problem in the related art that local overload will lead to a decrease in the filtering efficiency of the sand layer, resulting in excessive liquid being unable to pass through the sand layer evenly, thereby failing to effectively intercept impurities.

[0006] The invention provides a sand filtering device for thiourea synthetic liquid, comprising an equipment body, the equipment body comprising a tank body, a first filter plate and a second filter plate are installed in the tank body, a sand storage chamber is arranged between the first filter plate and the second filter plate, and a fixing frame is installed in the tank body; a spoiler assembly, the spoiler assembly comprises a boss connected to the tank body by a bearing, a connecting column is installed on the boss, a first nozzle is installed at one end of the connecting column close to the sand storage chamber, a plurality of brackets are distributed in an annular manner on the connecting column, a second nozzle is connected to the bracket by a bearing, and a hose is installed between the connecting column and the second nozzle; a plurality of guide columns are slidably connected inside the connecting column, a first rack plate is installed on the guide column, a first gear is meshedly connected on the first rack plate, and the first gear is installed on the second nozzle, a spring is arranged on the guide column, a ball is installed at one end of the guide column away from the rack plate, a guide ring is arranged outside the boss, and the guide ring is fixedly connected to the tank body, a plurality of arc grooves are distributed in an annular manner on one end of the guide ring close to the ball, and the arc groove is slidably connected to the ball.

[0007] As a further optimization scheme of the present invention, a water supply tray is provided outside the connecting column, and a water supply port is installed on the water supply tray, a water flow channel is opened in the water supply tray, a water inlet is opened on the connecting column, and the water inlet is connected to the water flow channel.

[0008] As a further optimization scheme of the present invention, two groups of annular grooves are symmetrically opened on the water supply plate, and the annular grooves are located on the upper and lower sides of the water flow channel. Sliding rings are slidably connected in the annular grooves, and the sliding rings are installed on the connecting columns.

[0009] As a further optimization scheme of the present invention, a motor is installed on the tank body, and a rotating shaft is installed at the output shaft of the motor. The rotating shaft is connected to the connecting column through a pulley transmission mechanism. The bearing on the rotating shaft is connected to a support plate, and the support plate is connected to the inner wall of the tank body.

[0010] As a further optimization solution of the present invention, the support plate is connected to a shaft with a bearing, and a plurality of spoilers are installed on the shaft, and the spoilers are located in the sand storage chamber.

[0011] As a further optimization scheme of the present invention, a connecting shaft is connected to the bearing on the support plate, and a second gear is installed on the connecting shaft and the rotating shaft, and the two groups of the second gears are meshingly connected. A cam is also installed on the connecting shaft, and a transmission rod is installed on the end of the cam away from the connecting shaft, and a groove wheel is installed on the shaft rod, a transmission groove is opened on the groove wheel, and the transmission groove is connected to the transmission rod in transmission, and a limit block is also installed on the cam, a limit groove is opened on the groove wheel, and the limit groove is adapted to the limit block.

[0012] As a further optimization solution of the present invention, a plurality of brush plates are provided on the second filter plate, and the brush plates are fixedly connected to the shaft rod.

[0013] As a further optimization solution of the present invention, a first sand port and a second sand port are installed on the tank body, the first sand port and the second sand port are connected to the inside of the sand storage chamber, and a sealing component is provided in the sand storage chamber.

[0014] As a further optimization scheme of the present invention, the closing component includes a connecting plate located in the sand storage chamber, and the connecting plate is connected to a plurality of flip shafts with bearings, the flip shafts are mounted with swing blades, and the initial state of the swing blades is inclined, a circular ring is arranged on the outside of the tank body, and a swing arm is installed at one end of the flip shaft away from the connecting plate, passing through the sand storage chamber, and the end of the swing arm away from the flip shaft is rotatably connected to the circular ring through a rotating shaft.

[0015] As a further optimization scheme of the present invention, a second rack plate is installed on the circular ring, and the second rack plate is meshed with a third gear, a transmission shaft is installed on the third gear, and the transmission shaft is rotatably connected to the tank body through a bearing, a third rack plate is meshed with the third gear, an electric push rod is installed on the tank body, and the telescopic end of the electric push rod is fixedly connected to the third rack plate.

[0016] The beneficial effects of the present invention are as follows: the present invention drives the second nozzle to swing up and down, utilizes the swinging motion of the second nozzle to control the thiourea synthetic liquid to be evenly distributed on the second filter plate, and interferes with the flow of the thiourea synthetic liquid, thereby improving the filtering effect of the thiourea synthetic liquid and avoiding the thiourea synthetic liquid from being concentratedly accumulated at a certain point on the second filter plate, causing the second filter plate to be locally overused and clogged with impurities. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 It is a schematic diagram of the internal three-dimensional structure of the present invention;

[0019] Figure 3 It is a partial three-dimensional structural schematic diagram of the present invention;

[0020] Figure 4 The present invention Figure 3 Schematic diagram of the local three-dimensional structure;

[0021] Figure 5 It is a schematic diagram of a partial three-dimensional structure of a spoiler assembly of the present invention;

[0022] Figure 6 The present invention Figure 5 A magnified view of the structure at center;

[0023] Figure 7 The present invention Figure 5 Schematic diagram of the three-dimensional cross-sectional structure;

[0024] Figure 8 The present invention Figure 7 A magnified view of the structure at B in the middle;

[0025] Fig. 9 It is a schematic diagram of the partial three-dimensional structure of the connection between the cam and the groove wheel of the present invention;

[0026] Fig.10 It is a schematic diagram of the three-dimensional structure of the closed component of the present invention.

[0027] In the figure: 100, equipment body; 101, tank body; 102, first sand mouth; 103, second sand mouth; 104, first liquid inlet pipe; 105, second liquid inlet pipe; 106, first liquid outlet pipe; 107, second liquid outlet pipe; 108, column; 109, first filter plate; 110, second filter plate; 111, fixing frame; 200, spoiler assembly; 201, boss; 202, connecting column; 203, first nozzle; 204, bracket; 205, second nozzle; 206, guide column; 207, first rack plate; 208, first gear; 209, spring; 210, sphere; 211, guide ring; 212, arc groove; 213, hose; 214, water supply tray; 215, water supply port ; 216, water flow channel; 217, water inlet; 218, sliding ring; 219, connecting pipe; 220, motor; 221, rotating shaft; 222, pulley transmission mechanism; 223, support plate; 224, connecting shaft; 225, second gear; 226, cam; 227, transmission rod; 228, groove wheel; 229, transmission groove; 230, limit block; 231, limit groove; 232, shaft rod; 233, spoiler; 234, brush plate; 300, closing component; 301, connecting plate; 302, flip shaft; 303, swing blade; 304, ring; 305, swing arm; 306, second rack plate; 307, third gear; 308, third rack plate; 309, electric push rod. DETAILED DESCRIPTION

[0028] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0029] according to Figure 1 and Figure 2As shown, a sand filtering device for thiourea synthetic liquid includes an equipment body 100, and the equipment body 100 includes a tank body 101. A first liquid inlet pipe 104 and a second liquid inlet pipe 105 are installed on the tank body 101. The end of the second liquid inlet pipe 105 away from the tank body 101 is connected to the first liquid inlet pipe 104. The first liquid inlet pipe 104 and the second liquid inlet pipe 105 are both installed with a first electrically controlled valve. The tank body 101 is also installed with a column 108 for supporting the tank body 101.

[0030] It should be understood that, through the setting of the first electrically-controlled valve, when the first electrically-controlled valve of the first liquid inlet pipe 104 is in the open state and the first electrically-controlled valve of the second liquid inlet pipe 105 is in the closed state, it is a backwash mode, and liquid is injected into the tank body 101 through the first liquid inlet pipe 104 to backwash the interior.

[0031] When the first electrically controlled valve of the first liquid inlet pipe 104 is closed and the first electrically controlled valve of the second liquid inlet pipe 105 is open, it is in filtering mode. At this time, the liquid flows into the second liquid inlet pipe 105 through the first liquid inlet pipe 104 and enters the tank body 101 for filtering.

[0032] The tank body 101 is also provided with a first liquid outlet pipe 106 and a second liquid outlet pipe 107, both of which are provided with a second electrically controlled valve. The first liquid outlet pipe 106 is provided to facilitate the discharge of the filtered thiourea synthetic liquid, and the second liquid outlet pipe 107 is provided to facilitate the discharge of the liquid after backwashing.

[0033] In summary, the use of the first electrically-controlled valve and the second electrically-controlled valve to control the first liquid inlet pipe 104 and the second liquid inlet pipe 105 to adjust the filtration mode and the backwash mode, as well as the discharge of liquid to the outside through the first liquid outlet pipe 106 and the second liquid outlet pipe 107 are existing technologies well known to people in the art, and the detailed working principle and work flow will not be described in detail here.

[0034] Further, according to Figure 2 As shown, a first filter plate 109 and a second filter plate 110 are installed in the tank body 101, and a sand storage chamber is provided between the first filter plate 109 and the second filter plate 110. The first filter plate 109 and the second filter plate 110 can limit the position of the sand material, thereby limiting the moving space of the sand material and preventing the sand material from scattering.

[0035] according to Figures 2 to 5As shown, a fixing frame 111 is installed in the tank body 101, and a spoiler assembly 200 is provided on the fixing frame 111. The spoiler assembly 200 includes a boss 201 connected to the tank body 101 by a bearing, and a connecting column 202 is installed on the boss 201. The fixing frame 111 and the connecting column 202 are rotatably connected through a bearing, and a first nozzle 203 is installed at one end of the connecting column 202 close to the sand storage chamber. A plurality of brackets 204 are distributed in an annular shape on the connecting column 202, and a second nozzle 205 is connected to the bracket 204 by a bearing, and a hose 213 is installed between the connecting column 202 and the second nozzle 205.

[0036] It should be understood that the provision of the first nozzle 203 and the second nozzle 205 facilitates the dispersion of the thiourea synthetic liquid, thereby avoiding concentrated discharge at a certain point on the surface of the second filter plate 110, thereby causing local overuse of the second filter plate 110, resulting in blockage and reduced service life.

[0037] Specifically, according to Figure 5 and Figure 6 As shown, a plurality of guide posts 206 are slidably connected inside the connecting post 202, and a first rack plate 207 is installed on the guide post 206. A guide groove adapted to the first rack plate 207 is provided on the connecting post 202. The setting of the guide groove facilitates the first rack plate 207 to be limited. A first gear 208 is meshedly connected to the first rack plate 207, and the first gear 208 is installed on the second nozzle 205. A spring 209 is provided on the guide post 206, and one end of the spring 209 is fixedly connected to the connecting post 202, and the other end is fixedly connected to the rack plate. When the first rack plate 207 is driven to move up and down, the first rack plate 207 is meshedly connected to the first gear 208, thereby driving the second nozzle 205 to swing up and down. The swinging motion of the second nozzle 205 is used to control the thiourea synthetic liquid to be evenly distributed on the second filter plate 110, and to interfere with the flow of the thiourea synthetic liquid.

[0038] Among them, a sphere 210 is installed at the end of the guide column 206 away from the rack plate, a guide ring 211 is arranged on the outside of the boss 201, and the guide ring 211 is fixedly connected to the tank body 101, and a plurality of arc grooves 212 are distributed in a ring shape at the end of the guide ring 211 close to the sphere 210, and an arc-shaped transition is adopted between each arc groove 212, and the arc groove 212 is slidably connected to the sphere 210.

[0039] When the connecting column 202 is driven to rotate, the ball 210 contacts the arc groove 212, and the ball 210 is squeezed, so that the guide column 206 moves up and down inside the connecting column 202, so as to drive the first rack plate 207 to move up and down, and the first rack plate 207 is meshed and connected with the first gear 208, so as to drive the second nozzle 205 to swing up and down, so as to control the thiourea synthetic liquid to be evenly distributed on the second filter plate 110. In addition, when the connecting column 202 is driven to rotate continuously, the ball 210 contacts the arc groove 212 continuously, so that the second nozzle 205 swings up and down continuously.

[0040] Further, according to Figure 7 and Figure 8 As shown, a water supply disk 214 is provided outside the connecting column 202, and a water supply port 215 is installed on the water supply disk 214, a water flow channel 216 is opened in the water supply disk 214, a water inlet 217 is opened on the connecting column 202, and the water inlet 217 is communicated with the water flow channel 216, two groups of annular grooves are symmetrically opened on the water supply disk 214, and the annular grooves are located on the upper and lower sides of the water flow channel 216, a sliding ring 218 is slidably connected in the annular groove, and the sliding ring 218 is installed on the connecting column 202, through the arrangement of the annular groove and the sliding ring 218, the water supply disk 214 is convenient for continuously supplying water to the rotating connecting column 202, thereby not affecting the rotation of the connecting column 202, a connecting pipe 219 is installed between the water supply port 215 and the second liquid inlet pipe 105, and the water supply disk 214 is installed on the fixed frame 111.

[0041] It should be noted that according to Figure 4 As shown, a motor 220 is installed on the tank body 101, and a rotating shaft 221 is installed at the output shaft of the motor 220. The rotating shaft 221 is connected to the connecting column 202 through a pulley transmission mechanism 222. A support plate 223 is connected to the bearing on the rotating shaft 221, and the support plate 223 is connected to the inner wall of the tank body 101.

[0042] When the driving motor 220 rotates, the connecting column 202 is driven to rotate synchronously through the pulley transmission mechanism 222, so that the first nozzle 203 and the second nozzle 205 rotate synchronously, so that the second nozzle 205 evenly sprays the thiourea synthetic liquid on the second filter plate 110, and the distribution of the thiourea synthetic liquid is disturbed by the rotation of the second nozzle 205, thereby improving the filtering effect of the thiourea synthetic liquid and preventing the thiourea synthetic liquid from being concentrated and accumulated in a certain place on the second filter plate 110, causing the second filter plate 110 to be locally overused and clogged with impurities.

[0043] In one embodiment, according to Figure 4As shown, the support plate 223 is connected to a shaft 232 by a bearing, and a plurality of spoilers 233 are installed on the shaft 232, and the spoilers 233 are located in the sand storage chamber. When the shaft 232 is driven to rotate, the shaft 232 drives the spoilers 233 to rotate synchronously, slowly stirring the sand material, and disturbing the sand material, thereby interfering with the flow path of the thiourea synthetic liquid in the sand material. In addition, the arrangement of the spoilers 233 can improve the fluidity of the sand material, and cooperate with the flow of the thiourea synthetic liquid, so that the internal impurities can be quickly deposited, thereby facilitating the centralized discharge of the bottom deposited dirt.

[0044] Specifically, the support plate 223 is connected to a connecting shaft 224 by a bearing, and the connecting shaft 224 and the rotating shaft 221 are both provided with second gears 225, and the two sets of second gears 225 are meshedly connected. When the rotating shaft 221 rotates, the second gears 225 are meshedly connected to drive the connecting shaft 224 to rotate synchronously.

[0045] Among them, according to Fig. 9 As shown, a cam 226 is also installed on the connecting shaft 224, and a transmission rod 227 is installed on the end of the cam 226 away from the connecting shaft 224, a groove wheel 228 is installed on the shaft rod 232, a transmission groove 229 is opened on the groove wheel 228, and the transmission groove 229 is connected to the transmission rod 227 in transmission, and a limit block 230 is also installed on the cam 226, a limit groove 231 is opened on the groove wheel 228, and the limit groove 231 is adapted to the limit block 230.

[0046] It should be noted that when the driving connection shaft 224 rotates, the cam 226 rotates synchronously, thereby driving the transmission rod 227 to rotate. When the transmission rod 227 rotates, the transmission rod 227 rotates to engage with the transmission groove 229, thereby driving the groove wheel 228 to rotate. In addition, during the rotation process, the rotation of the groove wheel 228 is limited by the setting of the limiting groove 231 and the limiting block 230, so that the groove wheel 228 can remain stable when intermittently rotating.

[0047] In yet another embodiment, according to Figure 4 As shown, a plurality of brush plates 234 are provided on the second filter plate 110, and the brush plates 234 are fixedly connected to the shaft 232. When the shaft 232 is driven to rotate, the shaft 232 drives the brush plates 234 to rotate on the surface of the second filter plate 110, so that the brush plates 234 contact the second filter plate 110 to clean the second filter plate 110, thereby disturbing and cleaning the impurities attached to the surface of the second filter plate 110, and improving the filtering efficiency of the thiourea synthetic liquid.

[0048] In one embodiment, according to Figure 2 and Figure 3As shown, the sand storage chamber is filled with granular filter filling materials, which can be quartz sand. Quartz sand can effectively remove suspended particles and solid impurities in the thiourea synthetic liquid, thereby avoiding affecting the purity of the product and subsequent chemical reactions. In addition, quartz sand helps improve the clarity of the thiourea synthetic liquid, making the liquid clearer.

[0049] Furthermore, the tank body 101 is provided with a first sand port 102 and a second sand port 103, and the first sand port 102 and the second sand port 103 are connected to the interior of the sand storage chamber. In a specific implementation, the first sand port 102 and the second sand port 103 are connected to a screw pump, and the screw pump is controlled to rotate, so that the screw pump inputs the sand material to be replaced into the first sand port 102, and the second sand port 103 discharges the sand material containing impurities and dirt outward through the screw pump, thereby facilitating the replacement of the internal sand material. In this embodiment, through the provision of the first sand port 102 and the second sand port 103, the sand material inside the tank body 101 can be quickly replaced, thereby effectively removing the dirt in the granular filter filling material and avoiding blockage caused by long-term use.

[0050] In another embodiment, there are various impurities in the thiourea synthetic liquid, including undissolved thiourea crystals or other crystalline impurities, suspended solid particles such as granular impurities, impurity particles, precipitations such as reaction products, and organic pollutants such as organic solvents, organic wastewater, etc. When the impurities pass through the sand filter device, they will be intercepted and adsorbed by the sand layer and gradually deposited at the bottom of the sand filter device. Therefore, after using the sand filter device, it is necessary to regularly clean the sediment at the bottom of the sand layer to maintain the filtering effect and operating efficiency of the sand filter device. Figure 2 and Figure 3 As shown, a closing component 300 is provided in the sand storage chamber to partition the sand storage chamber through the closing component 300 so that the sand is divided into two layers, an upper layer and an lower layer, thereby facilitating the discharge of the deposited sand at the bottom to maintain the filtering effect of the sand filter device.

[0051] Specifically, according to Fig.10 As shown, the sealing assembly 300 includes a connecting plate 301 located in the sand storage chamber, and a plurality of flip shafts 302 are connected to the bearings on the connecting plate 301, and a swing blade 303 is installed on the flip shaft 302, and the initial state of the swing blade 303 is inclined. In this embodiment, the initial state of the swing blade 303 is set to be inclined, so as to facilitate the disturbance of the thiourea synthetic liquid in the sand material, so that the thiourea synthetic liquid is evenly distributed in the sand material, and the accumulation of impurities is avoided.

[0052] A ring 304 is disposed outside the tank body 101 , and a swing arm 305 is installed on one end of the flip shaft 302 away from the connecting plate 301 through the sand storage chamber, and one end of the swing arm 305 away from the flip shaft 302 is rotatably connected to the ring 304 through a rotating shaft.

[0053] It should be understood that when the driving ring 304 rotates, the swing arm 305 is connected to the rotating shaft of the ring 304 through the swing arm 305, and the swing arm 305 is synchronously driven to rotate. When the swing arm 305 rotates, the flip shaft 302 is controlled to rotate, so that the swing blades 303 rotate synchronously, and the swing blades 303 are closed, so as to separate the inside of the sand storage chamber and discharge the sand containing deposited impurities. In addition, the connecting plate 301 is rotatably connected to the shaft rod 232 through the bearing, so that the connecting plate 301 is rotatably supported by the shaft rod 232, and the rotation of the shaft rod 232 is not affected.

[0054] Furthermore, a second rack plate 306 is installed on the ring 304, and the second rack plate 306 is meshed with a third gear 307, a transmission shaft is installed on the third gear 307, and the transmission shaft is rotatably connected to the tank body 101 through a bearing, a third rack plate 308 is meshed with the third gear 307, an electric push rod 309 is installed on the tank body 101, and the telescopic end of the electric push rod 309 is fixedly connected to the third rack plate 308.

[0055] It should be noted that when the sand storage chamber needs to be separated into upper and lower parts, the electric push rod 309 is driven to perform telescopic movement, and the third rack plate 308 is controlled to move synchronously. The second rack plate 306, the third rack plate 308 and the third gear 307 are meshed and connected, so as to control the ring 304 to rotate, so as to drive the swing blade 303 to rotate synchronously, and the interior of the sand storage chamber is divided into two parts, so as to facilitate the discharge of sand containing deposited impurities.

[0056] An example of the present specific implementation mode is described above, but the present embodiment is not limited to the above-mentioned specific implementation mode, which is merely illustrative and not restrictive. A person skilled in the art may make many forms inspired by the present embodiment, all of which are protected by the present embodiment.

Claims

1. A sand filter for thiourea synthetic liquid, used for filtering thiourea synthetic liquid, characterized in that: include: An equipment body (100), the equipment body (100) comprising a tank body (101), a first filter plate (109) and a second filter plate (110) being installed in the tank body (101), a sand storage chamber being provided between the first filter plate (109) and the second filter plate (110), and a fixing frame (111) being installed in the tank body (101); A spoiler assembly (200), the spoiler assembly (200) comprising a boss (201) connected to the tank body (101) by a bearing, a connecting column (202) being mounted on the boss (201), a first nozzle (203) being mounted on one end of the connecting column (202) close to the sand storage chamber, a plurality of brackets (204) being distributed in an annular shape on the connecting column (202), a second nozzle (205) being connected to the bracket (204) by a bearing, and a hose (213) being mounted between the connecting column (202) and the second nozzle (205); A plurality of guide pillars (206) are slidably connected inside the connecting pillar (202), and a first rack plate (207) is installed on the guide pillar (206), a first gear (208) is meshingly connected to the first rack plate (207), and the first gear (208) is installed on the second nozzle (205), a spring (209) is provided on the guide pillar (206), a ball (210) is installed at one end of the guide pillar (206) away from the rack plate, a guide ring (211) is provided outside the boss (201), and the guide ring (211) is fixedly connected to the tank body (101), and a plurality of arc grooves (212) are distributed in an annular shape at one end of the guide ring (211) close to the ball (210), and the arc grooves (212) are slidably connected to the ball (210); A first sand opening (102) and a second sand opening (103) are installed on the tank body (101); the first sand opening (102) and the second sand opening (103) are connected to the interior of a sand storage chamber; and a sealing component (300) is provided in the sand storage chamber; The closure assembly (300) comprises a connection plate (301) located in the sand storage chamber, and a plurality of turning shafts (302) are connected to bearings on the connection plate (301), swing blades (303) are installed on the turning shafts (302), and the swing blades (303) are initially arranged to be inclined, a circular ring (304) is arranged outside the tank body (101), and a swing arm (305) is installed at one end of the turning shaft (302) away from the connection plate (301) and passing through the sand storage chamber, and the end of the swing arm (305) away from the turning shaft (302) is rotatably connected to the circular ring (304) via a rotating shaft; The initial state of the swing blade (303) is set to be inclined, so as to facilitate the disturbance of the thiourea synthetic liquid in the sand material, so that the thiourea synthetic liquid is evenly distributed in the sand material, and the accumulation of impurities is avoided; When the sand storage chamber needs to be separated into upper and lower parts, the control ring (304) is rotated to drive the swing blade (303) to rotate synchronously, so as to separate the interior of the sand storage chamber into upper and lower parts, so as to facilitate the discharge of sand containing deposited impurities.

2. A sand filter device for thiourea synthesis liquid according to claim 1, characterized in that: A water supply tray (214) is provided outside the connection column (202), and a water supply port (215) is installed on the water supply tray (214). A water flow channel (216) is provided inside the water supply tray (214). A water inlet (217) is provided on the connection column (202), and the water inlet (217) is communicated with the water flow channel (216).

3. A sand filter device for thiourea synthesis liquid according to claim 2, characterized in that: The water supply plate (214) is symmetrically provided with two groups of annular grooves, and the annular grooves are located at the upper and lower sides of the water flow channel (216). A sliding ring (218) is slidably connected in the annular groove, and the sliding ring (218) is installed on the connecting column (202).

4. A sand filter device for thiourea synthesis liquid according to claim 1, characterized in that: The tank body (101) is mounted with a motor (220), and a rotating shaft (221) is mounted on the output shaft of the motor (220); the rotating shaft (221) is connected to the connecting column (202) via a pulley transmission mechanism (222); a support plate (223) is connected to a bearing on the rotating shaft (221), and the support plate (223) is connected to the inner wall of the tank body (101).

5. A sand filter device for thiourea synthesis liquid according to claim 4, characterized in that: The support plate (223) is connected to a shaft (232) via a bearing, and a plurality of spoilers (233) are mounted on the shaft (232), wherein the spoilers (233) are located in the sand storage chamber.

6. A sand filter device for thiourea synthesis liquid according to claim 5, characterized in that: The support plate (223) is connected to a connecting shaft (224) by a bearing, and the connecting shaft (224) and the rotating shaft (221) are both provided with second gears (225), and two groups of the second gears (225) are meshingly connected. The connecting shaft (224) is also provided with a cam (226), and a transmission rod (227) is provided at one end of the cam (226) away from the connecting shaft (224). The shaft rod (232) is provided with a groove wheel (228), and a transmission groove (229) is provided on the groove wheel (228), and the transmission groove (229) is transmission-connected to the transmission rod (227). The cam (226) is also provided with a limiting block (230), and a limiting groove (231) is provided on the groove wheel (228), and the limiting groove (231) is adapted to the limiting block (230).

7. A sand filter device for thiourea synthesis liquid according to claim 5, characterized in that: A plurality of brush plates (234) are provided on the second filter plate (110), and the brush plates (234) are fixedly connected to the shaft rod (232).

8. The sand filtration device for thiourea synthesis liquid according to claim 1, characterized in that: A second rack plate (306) is mounted on the circular ring (304), and a third gear (307) is meshedly connected to the second rack plate (306), a transmission shaft is mounted on the third gear (307), and the transmission shaft is rotatably connected to the tank body (101) via a bearing, a third rack plate (308) is meshedly connected to the third gear (307), an electric push rod (309) is mounted on the tank body (101), and a telescopic end of the electric push rod (309) is fixedly connected to the third rack plate (308).

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