Filter for full-closed intelligent loading and unloading device of liquid dangerous chemical tank truck

Abstract

The present application relates to the field of unloading equipment, especially to a liquid dangerous chemical tank car full-closed intelligent unloading device, which comprises a base, a motor, a speed reducer, a filter, a cam pump, a plurality of unloading cranes, an unloading valve for opening and closing the unloading crane, a flow monitoring instrument, a temperature monitoring instrument, a pre-pump pressure monitoring instrument, a post-pump pressure monitoring instrument, a control system, a first control valve for opening and closing the liquid inlet pipe and a second control valve for opening and closing the liquid outlet pipe. It makes full use of intelligent sensors, industrial internet of things and artificial intelligence technology to realize full-closed unloading, and has the functions of automatic start and stop, real-time monitoring, safety detection, state sensing, interlocking protection and the like, and changes the traditional unloading opening and the risk of running and leaking.

Description

[0001] This application is a divisional application, which is based on the application filed on December 20, 2022, with application number 202211644156.4 and invention title "A Fully Enclosed Intelligent Unloading Device for Liquid Hazardous Chemical Tank Trucks". Technical Field

[0002] This invention relates to the field of unloading equipment, and in particular to a filter for a fully enclosed intelligent unloading device for liquid hazardous chemical tank trucks. Background Technology

[0003] According to data disclosed by the China Federation of Logistics and Purchasing, the national hazardous chemicals logistics market size increased from 1.18 trillion yuan in 2015 to 2.24 trillion yuan in 2021.

[0004] The main modes of transporting hazardous chemicals include road transport, water transport, and rail transport. Due to the uneven distribution of domestic chemical raw material production and sales, road transport offers significant flexibility and thus occupies a dominant position.

[0005] A key objective of the innovative development of the hazardous chemicals logistics industry is to improve environmental protection, safety, and intelligent technology levels. Road and rail transport, which account for 78% of hazardous chemicals transportation, often present adverse effects such as pollutant emissions, safety risks, and occupational hazards during the unloading process. According to the U.S. Environmental Protection Agency's AP-42: Compilation of Air Emissions Factors, taking gasoline as an example, the average VOC emission rate during buffer tank unloading is 120 mg / L, resulting in significant pollutant emissions, safety risks, and substantial resource waste. Therefore, the environmental protection, safety, and intelligent technology upgrades for unloading liquid hazardous materials by road and rail tank cars are urgently needed. Summary of the Invention

[0006] This invention aims to solve the above-mentioned problems and provides a filter for a fully enclosed intelligent unloading device for liquid hazardous chemical tank trucks. The technical solution adopted is as follows:

[0007] A filter for a fully enclosed intelligent unloading device for liquid hazardous chemical tank trucks. The intelligent unloading device includes a base, a motor, a gearbox, a filter, a cam pump, multiple unloading arms, unloading valves for opening and closing the unloading arms, flow monitoring instruments, temperature monitoring instruments, pre-pump pressure monitoring instruments, post-pump pressure monitoring instruments, a control system, a first control valve for opening and closing the inlet pipe, and a second control valve for opening and closing the outlet pipe.

[0008] The cam pump inlet is connected to the inlet pipe and the outlet is connected to the outlet pipe. The filter is installed on the inlet pipe. The flow monitoring instrument is installed on the inlet pipe and located upstream of the first control valve. The temperature monitoring instrument and the pre-pump pressure monitoring instrument are installed on the inlet pipe and located downstream of the first control valve. The post-pump pressure monitoring instrument is installed on the outlet pipe. The unloading valve, control valve, and motor are controlled by the control system. The flow monitoring instrument, temperature monitoring instrument, pre-pump pressure monitoring instrument, and post-pump pressure monitoring instrument provide operating status information to the control system.

[0009] The control system includes a monitoring system, an unloading controller, and field control instruments. The monitoring system, the unloading controller, and the field control instruments exchange data with the DCS via MODBUS-RTU.

[0010] It also includes an anti-static controller, the unloading arm is connected to the anti-static controller, and the anti-static controller can output status signals to the control system;

[0011] The filter includes a cylindrical shell, with a top cover and a bottom cover sealed and fixed at the top and bottom ends of the cylindrical shell, respectively; an inlet and an outlet are arranged opposite to each other on the front and rear sides of the cylindrical shell; the inlet is connected to the first body of the liquid inlet pipe, and the outlet is connected to the second body of the liquid inlet pipe; a cylindrical filter screen (44) is provided inside the cylindrical shell, with the top end of the cylindrical filter screen rotating on the top cover and the bottom end of the cylindrical filter screen inserted into the annular slot of the bottom cover; the top cover and the bottom cover are fixedly connected by two telescopic slides; the two telescopic slides are located in the middle of the inlet and the outlet, with the inner ends of the two telescopic slides sealing and sliding on the outer surface of the cylindrical filter screen, and the outer ends of the two telescopic slides sealing and sliding on the inner surface of the cylindrical shell;

[0012] The telescopic slide includes an upper scraper, a lower scraper, and a first compression spring; the upper end of the upper scraper is fixed to the top cover, the lower end of the upper scraper slides in a sealed manner within the telescopic groove at the upper end of the lower scraper, the lower end of the lower scraper is fixed to the bottom cover, one end of the first compression spring is fixed to the lower end of the upper scraper, and the other end of the first compression spring is fixed to the bottom surface of the telescopic groove; the inner ends of both the upper and lower scrapers slide in a sealed manner on the outer surface of the cylindrical filter screen, and the outer ends of both the upper and lower scrapers slide in a sealed manner on the inner surface of the cylindrical outer shell;

[0013] A ring bevel gear is fitted on the outer surface of the cylindrical filter screen. A guide slider is fixed to the inner end of the ring bevel gear. The guide slider slides in the longitudinal groove on the outer side of the cylindrical filter screen. The ring bevel gear slides in the limiting slides at the inner ends of the two lower scrapers. The ring bevel gear meshes vertically with the driving bevel gear. The driving bevel gear is fixed to the inner end of the drive shaft. The middle part of the drive shaft rotates on the cylindrical shell. The outer end of the drive shaft is connected to the output shaft of the power motor through a coupling.

[0014] The bottom cover includes a bottom cover body fixed to the bottom of a cylindrical outer shell. A vertical tube is rotatably connected to the middle of the bottom cover body. A multi-faceted groove is provided at the upper end of the vertical tube. The lower end of a multi-faceted slide rod slides within the multi-faceted groove. The lower end of the multi-faceted slide rod is fixedly connected to the bottom surface of the multi-faceted groove by a second compression spring. Multiple stirring plates are evenly fixed around the upper end of the multi-faceted slide rod. A driven friction wheel is fixed on the vertical tube. The driven friction wheel is connected to the driving friction wheel by friction transmission. The driving friction wheel is in frictional engagement with the inner surface of the cylindrical filter screen. The driving friction wheel is fixed to the upper end of a linkage shaft. The lower end of the linkage shaft rotates on the bottom cover body. Multiple cleaning brushes are evenly fixed around the linkage shaft to scrub the inner wall of the cylindrical filter screen. The linkage shaft is located between the inlet of the cylindrical outer shell and the telescopic slide.

[0015] The top cover includes a top cover body fixed to the top of a cylindrical shell. A guide rod slides within the central through hole of the top cover body. A flow control plug is fixed to the lower end of the guide rod. The flow control plug slides and seals inside the upper part of the cylindrical shell to adjust the opening width of the inlet and outlet of the cylindrical shell. The flow control plug is fixedly connected to a telescopic slide, and the top of the cylindrical filter screen rotates on the flow control plug. A third compression spring is sleeved on the guide rod, located between the top cover body and the flow control plug. A limiting nut is threaded onto the guide rod, and the limiting nut is locked above the top cover body. An adjusting screw is threaded onto the top cover body, and the lower end of the adjusting screw is locked above the flow control plug.

[0016] Based on the above technical solution, compensators are connected to the inlet pipe and the outlet pipe.

[0017] Based on the above technical solution, the liquid outlet pipe is connected to the safety valve, and the liquid inlet pipe is connected to the safety valve through the overflow pipe.

[0018] Based on the above technical solution, a one-way valve is installed on the liquid outlet pipe.

[0019] The beneficial effects of this invention are: it makes full use of intelligent sensors, industrial Internet of Things and artificial intelligence technologies to achieve fully enclosed unloading, and at the same time has functions such as automatic start and stop, real-time monitoring, safety detection, status perception and interlock protection, changing the traditional open unloading and risk of running away. Attached Figure Description

[0020] Figure 1 : Schematic diagram of the principle structure of the present invention.

[0021] Figure 2 : A three-dimensional structural diagram of the present invention.

[0022] Figure 3 : Schematic diagram of the internal filter structure of this invention

[0023] Figure 4 Cross-sectional view of the internal filter of the present invention Figure 1 ;

[0024] Figure 5 Cross-sectional view of the internal filter of the present invention Figure 2 ;

[0025] Figure 6 : A cross-sectional view of the internal top cover of the present invention;

[0026] Figure 7 : A schematic diagram of the internal bottom cover of the present invention;

[0027] Figure 8 : A schematic diagram of the internal cylindrical filter screen of this invention;

[0028] Figure 9 : Schematic diagram of the internal telescopic carriage of the present invention. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0030] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] In the description of this invention, it should be understood that the terms "center," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," and "inner," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] like Figure 1 and Figure 2 As shown, a fully enclosed intelligent unloading device for liquid hazardous chemical tank trucks is characterized by comprising a base 11, a motor 21, a gearbox 22, a filter 32, a cam pump 23, multiple unloading arms, unloading valves for opening and closing the unloading arms, a flow monitoring instrument 12, a temperature monitoring instrument 13, a pre-pump pressure monitoring instrument 14, a post-pump pressure monitoring instrument 15, a control system 13, a first control valve 16 for opening and closing the inlet pipe 31, and a second control valve 17 for opening and closing the outlet pipe 34. The inlet of the cam pump 23 is connected to the inlet pipe 31, and the filter 32 is installed on the inlet pipe 31. The outlet of the wheel pump 23 is connected to the outlet pipe 34. The flow monitoring instrument is installed on the inlet pipe 31 and is located upstream of the first control valve 16. The temperature monitoring instrument 13 and the pre-pump pressure monitoring instrument are installed on the inlet pipe 31 and are located downstream of the first control valve 16. The post-pump pressure monitoring instrument 14 is installed on the outlet pipe 34. The unloading valve, the first control valve 16, the second control valve 17, and the motor 21 are controlled by the control system. The flow monitoring instrument 12, the temperature monitoring instrument 13, the pre-pump pressure monitoring instrument 14, and the post-pump pressure monitoring instrument 15 provide operating status information to the control system.

[0034] The control system mainly consists of a monitoring system, an unloading controller, and field control instruments.

[0035] The unloading supervisory control and data acquisition (SCADA) system displays specific on-site signals, including the unloading arm flow switch status, unloading valve status, liquid collection tank temperature and pressure, unloading switch status, pump inlet and outlet pressures, pump operating status, and electrostatic discharge (ESD) signals. The on-site control system then controls the opening and closing of valves and the start and stop of pumps according to the unloading process and the status of various on-site signals. The on-site control system can exchange data with the DCS via MODBUS-RTU.

[0036] Preferably, the inlet pipe 31 and the outlet pipe 34 are connected to a compensator 33. The compensator 33 can be a corrugated pipe or other structure, which plays a role in buffering and shock absorption of the overall equipment.

[0037] Preferably, the outlet pipe 34 is connected to the safety valve 37, and the inlet pipe 31 is connected to the safety valve 37 through the overflow pipe 38.

[0038] To ensure safety during the unloading process, the fully enclosed intelligent unloading device for liquid hazardous chemical tank trucks is also equipped with an anti-static controller to ensure the detection and control of static electricity during the unloading process. The unloading arm is connected to the anti-static controller, which can output status signals to the control system.

[0039] Each loading arm has a corresponding anti-static controller during unloading. If static electricity accumulates, the static grounding clamp is not securely released, or the static grounding clamp falls off, the controller will generate an audible and visual alarm and simultaneously output a status signal to the control system. The system will then interlock according to process requirements to ensure safety during the loading process.

[0040] Preferably, a one-way valve 18 is installed on the liquid outlet pipe 34. Optionally, a return pipe 35 is connected between the liquid inlet pipe 31 and the liquid outlet pipe 34, and a return valve 36 is provided on the return pipe 35 to control its opening and closing.

[0041] The control system mainly consists of three parts: unloading arm system, unloading pump skid system, and remote central control room DCS upper computer monitoring system.

[0042] The unloading arm system collects signals related to static grounding, flow switch, arm alignment, arm return, and other safety interlocks (such as combustible gas alarms) for each unloading arm position, and outputs control signals to open and close the electrically controlled valve at the arm outlet. The unloading arm system outputs its operating status, fault status, and unloading completion signal to the unloading pump skid system in the form of switch signals.

[0043] The unloading pump skid system collects liquid level signals from the collection tank to control the start and stop of the unloading pump, open and close the electric ball valves at the pump inlet and outlet, collect the working status, fault status, and first unloading completion signal of each unloading arm, and outputs the second unloading command to each unloading arm system.

[0044] During the unloading process, the remote control room's DCS (Distributed Computer System) monitor collects all signals from the unloading pump skid in real time via an RS485 communication interface and displays them centrally on the computer screen, allowing operators to monitor the unloading status in real time. In case of an emergency during unloading, operators can remotely output an emergency stop signal to the unloading system through the DCS monitor. Upon receiving the emergency stop signal, the unloading pump skid system immediately activates its emergency procedures. After the DCS system's emergency stop interlock is released, the operator must press the reset button on-site to confirm and restart the unloading process. The system will then re-enter the automatic unloading process.

[0045] Unloading process:

[0046] The operator performs routine checks on the unloading pump skid, including checking whether the inlet and outlet manual ball valves are open, whether the supporting electrical control cabinet is working properly, whether the touch LCD display is normal, whether there are any alarms on the panel, whether the indicator lights are working properly, and whether each knob is in the correct position.

[0047] The operator logs into the unloading pump skid system (using an explosion-proof mouse and entering the username and password on the touchscreen), selects the unloading arms (all arms are selected by default), and switches the "System" control knob to the "On" position. The unloading pump skid system opens the electric ball valves before and after the pump, collects the liquid level in the collection tank and the oil temperature in real time, and automatically starts the unloading pump when the conditions are met. The unloading pump skid system will execute frequency conversion control of the unloading process based on conditions such as changes in pump outlet pressure and the rate of liquid level change.

[0048] The operator operates the unloading arm to connect the bottom unloading arm to the tank truck unloading port, ensures the static grounding clamp is properly connected to the tank truck, and completes the unloading preparation work. After completing the unloading preparation work, the operator operates the "unloading" knob on the control panel to the "open" position. The system automatically opens the electric control valve at the arm outlet and begins unloading. The unloading arm system synchronously outputs the arm working status signal to the unloading pump skid system.

[0049] During unloading, the unloading arm system will monitor the static grounding clamp signal, flow switch signal, arm alignment signal, or combustible gas alarm signal near the site in real time. If any of these signals fail or alarm, the unloading arm system will automatically close the electric control valve at the arm outlet and simultaneously output the unloading arm fault status signal to the unloading pump skid for panel display. After troubleshooting is completed, the unloading arm system will open the electric control valve at the arm outlet and continue unloading.

[0050] During the unloading process, if the unloading pump skid system needs to interlock with the unloading arm for emergency stop, the unloading pump skid system outputs an emergency stop command to the designated unloading arm and executes the corresponding interlock control program.

[0051] After unloading is completed, the unloading arm system will automatically close the electric control valve at the arm outlet and simultaneously output an unloading completion signal to the unloading pump skid system (at this stage, most of the fuel oil in the tanker has been unloaded).

[0052] After the unloading pump skid system receives the first unloading completion signal from all unloading arms, the unloading pump skid system outputs a second unloading command to each unloading arm after a set time.

[0053] Upon receiving the secondary unloading command signal, each unloading arm will reopen the electric control valve at the arm outlet and maintain this position for a set period of time before automatically closing the electric control valve (during which time all remaining fuel in the tanker and the arm will be unloaded).

[0054] After the operator completes the loading arm return operation, he / she turns the "unload" knob to the "close" position on the loading arm control panel to complete the unloading task of this loading arm.

[0055] When all unloading arms are switched to "stop" and the liquid level in the collection tank is lower than the operating conditions of the unloading pump, the operator operates the "system" control knob on the unloading pump skid to the "close" position. The unloading pump skid automatically closes the electric ball valves before and after the unloading pump, completing the unloading task of the unloading pump skid for this time.

[0056] The unloading system operator logs out of the current login state, and the unloading pump skid host computer system is in standby mode, so other personnel cannot operate the unloading screen.

[0057] The remote DCS control system collects relevant data from the unloading pump skid in real time and monitors it in the host computer in the remote central control room to keep track of the unloading dynamic process.

[0058] During the unloading process, the unloading pump skid system has multiple safety interlocks (including but not limited to):

[0059] The unloading pump outlet pressure exceeds the set value, and the system interlocks to stop the unloading pump.

[0060] If the vacuum level at the unloading pump inlet exceeds the set value, the system interlock will stop the unloading pump.

[0061] The remote DCS control system provides an emergency stop output, and the system interlocks to stop the unloading pump.

[0062] Emergency stop via the on-site control panel; system stops unloading pump.

[0063] Interface description between the pump skid unloading system and other systems:

[0064] Interface with unloading arm system:

[0065] The unloading arm system outputs three switching signals to the unloading pump skid system, namely:

[0066] Loading arm operating status signal (achieved via a knob on the panel, passive dry contact signal).

[0067] Loading arm fault status signal (output through the loading arm PLC control system, passive dry contact signal)

[0068] Signal indicating completion of unloading (output via the loading arm PLC control system, passive dry contact signal).

[0069] The unloading pump skid system outputs two switching signals to the unloading arm system, namely:

[0070] Secondary unloading command (output via the PLC control system of the unloading pump skid, passive dry contact signal)

[0071] Emergency stop command for loading arm (output via PLC control system of unloading pump skid, passive dry contact signal)

[0072] Interface with DCS control system

[0073] The unloading PLC control system interacts with the remote DCS via the Modbus-RTU protocol and RS485 communication interface.

[0074] The PLC controller only receives emergency stop commands from the DCS control system.

[0075] The PLC controller provides data tables, and the DCS system collects relevant data during the unloading process, such as the operating status of the frequency converter, the liquid level and problems in the collection tank, the operating status and switch status of the electric valve, and displays the data in the DCS upper computer monitoring system so that operators can monitor the unloading process in real time.

[0076] Work process: (1) On-site unloading operators only need to operate the unloading arm to connect with the tank truck, the anti-static controller is connected and in place, and the indicator lights work normally;

[0077] (2) The control system will automatically collect external field signals, output signals, and control the start-up and operation of the unloading pump;

[0078] (3) By observing the dynamic process flow on the display screen, the control personnel can see the switching and working status of each component in real time;

[0079] (4) In case of emergency during unloading, the system will sound an alarm and automatically interlock the vehicle to stop; or you can manually press the "emergency stop" button to achieve the purpose of interlocking the vehicle to stop.

[0080] (5) The intelligent unloading control system will determine whether unloading is complete based on the real-time unloading situation and flow switch information, and then automatically output control signals to close the unloading valve. The control system will also output reasonable inverter operating frequency data based on the number of unloading arms in operation, the pressure before and after the unloading pump, the liquid level in the collection tank, etc., to efficiently control the unloading pump and achieve the purpose of energy saving, safe operation, and stable unloading.

[0081] like Figure 3-9As shown, optionally, the filter 32 includes a cylindrical shell 39, with a top cover 40 and a bottom cover 41 sealed and fixed at the top and bottom ends of the cylindrical shell 39, respectively; an inlet 42 and an outlet 43 are arranged opposite to each other on the front and rear sides of the cylindrical shell 39; the inlet 42 is connected to the first tube of the inlet pipe 31, and the outlet 43 is connected to the second tube of the inlet pipe 31; a cylindrical filter screen 44 is provided inside the cylindrical shell 39, with the top end of the cylindrical filter screen 44 rotating on the top cover 40, and the bottom end of the cylindrical filter screen 44 inserted into the annular slot of the bottom cover 41; the top cover 40 and the bottom cover 41 are fixedly connected by two telescopic slides 45; the two telescopic slides 45 are located in the middle of the inlet 42 and the outlet 43, with the inner ends of the two telescopic slides 45 sealingly sliding on the outer surface of the cylindrical filter screen 44, and the outer ends of the two telescopic slides 45 sealingly sliding on the inner surface of the cylindrical shell 39.

[0082] The filter 32 is used to filter the liquid hazardous chemicals transported through the inlet pipe 31 to reduce the amount of impurities in the liquid hazardous chemicals and improve the quality of the final product. During filtration, the liquid hazardous chemicals first enter the cylindrical shell 39 through the inlet 42. Since the cylindrical filter screen 44 has telescopic slides 45 at both ends, the two telescopic slides 45 and the cylindrical filter screen 44 divide the interior of the cylindrical shell 39 into front and rear regions. The liquid hazardous chemicals first enter the front region and are filtered by the front filter screen of the cylindrical filter screen 44. After filtration, the liquid hazardous chemicals enter the interior of the cylindrical filter screen 44 and then pass through the cylindrical filter screen 44. The filter holes at the rear end of the cylindrical filter screen 44 divert the flow to the outside of the cylindrical filter screen 44 and out through the outlet 43. By filtering the liquid hazardous chemicals, the quality of the liquid hazardous chemicals can be effectively improved. After filtration, the liquid hazardous chemicals are diverted, making the components inside the liquid hazardous chemicals more evenly dispersed. The cylindrical filter screen 44 can rotate, which facilitates scraping and cleaning of the outer wall of the cylindrical filter screen 44 through the two telescopic slides 45, reducing the probability of clogging of the cylindrical filter screen 44. The top and bottom ends of the cylindrical outer shell 39 are respectively sealed and fixed with the top cover 40 and the bottom cover 41. Both the top cover 40 and the bottom cover 41 are detachable structures, which facilitates the replacement of the cylindrical filter screen 44 or the cleaning of the filtered impurities.

[0083] like Figure 3-9 As shown, the telescopic slide 45 includes an upper scraper 451, a lower scraper 452, and a first compression spring 453. The upper end of the upper scraper 451 is fixed to the top cover 40, and the lower end of the upper scraper 451 slides in a telescopic groove at the upper end of the lower scraper 452. The lower end of the lower scraper 452 is fixed to the bottom cover 41. One end of the first compression spring 453 is fixed to the lower end of the upper scraper 451, and the other end of the first compression spring 453 is fixed to the bottom surface of the telescopic groove. The inner ends of the upper scraper 451 and the lower scraper 452 slide in a sealed manner on the outer surface of the cylindrical filter screen 44, and the outer ends of the upper scraper 451 and the lower scraper 452 slide in a sealed manner on the inner surface of the cylindrical outer shell 39.

[0084] The bottom end of the cylindrical filter screen 44 is inserted into the annular slot of the bottom cover 41, allowing the size of the cylindrical filter screen 44 to be adjusted. The depth of the bottom end of the cylindrical filter screen 44 inserted into the annular slot of the bottom cover 41 can be adjusted by controlling the top cover 40, thereby adjusting the size of the cylindrical filter screen 44 for use in conveying liquid hazardous chemicals with different flow rates or velocities. When adjusting the depth of the cylindrical filter screen 44 inserted into the annular slot of the bottom cover 41, the overall size of the telescopic slide 45 changes accordingly. The lower end of the upper scraper 451 can slide in a sealed manner within the telescopic groove at the upper end of the lower scraper 452, compressing the first compression spring 453, thereby achieving the adjustment of the overall size of the telescopic slide 45. This ensures that the adjustment of the applicable range of the cylindrical filter screen 44 is not affected, nor does it affect the cleaning effect of the telescopic slide 45 on the cylindrical filter screen 44.

[0085] like Figure 3-9 As shown, an annular bevel gear 441 is fitted on the outer surface of the cylindrical filter screen 44. A guide slider is fixed to the inner end of the annular bevel gear 441. The guide slider slides in the longitudinal groove on the outer side of the cylindrical filter screen 44. The annular bevel gear 441 is slidably engaged in the limiting slide rails at the inner ends of the two lower scrapers 452. The annular bevel gear 441 meshes vertically with the driving bevel gear 442. The driving bevel gear 442 is fixed to the inner end of the transmission shaft 443. The middle part of the transmission shaft 443 is sealed and rotates on the cylindrical outer shell 39. The outer end of the transmission shaft 443 is connected to the output shaft of the power motor 444 through a coupling.

[0086] After the power motor 444 is powered on and started, it drives the transmission shaft 443 to rotate. The rotation of the transmission shaft 443 drives the drive bevel gear 442 to rotate, which in turn meshes with and drives the ring bevel gear 441 to rotate. The rotation of the ring bevel gear 441, through the cooperation of the guide slider and the longitudinal slide groove, drives the cylindrical filter screen 44 to rotate, thus allowing the cylindrical filter screen 44 to perform filtration in a rotating state. This ensures that different positions of the cylindrical filter screen 44 continuously contact the telescopic slide 45 for continuous cleaning, and also allows different positions of the cylindrical filter screen 44 to react with the liquid. The filter effectively filters hazardous chemicals while cleaning them, ensuring filtration efficiency. The moving cylindrical filter screen 44 disperses the impact force of the liquid hazardous chemicals entering the cylindrical outer shell 39 through the inlet 42, preventing the cylindrical filter screen 44 from being deformed due to continuous impact from the liquid hazardous chemicals at the same position. This helps to make the cylindrical filter screen 44 more evenly stressed, ensuring its service life. Furthermore, the design of the guide slider and longitudinal groove structure allows the cylindrical filter screen 44 to rotate without affecting its up-and-down sliding movement within the annular slot of the bottom cover 41.

[0087] like Figure 3-9As shown, the bottom cover 41 includes a bottom cover body 411 fixed to the bottom of the cylindrical outer shell 39. A vertical tube 412 is rotatably connected to the middle of the bottom cover body 411. A multi-faceted groove is provided at the upper end of the vertical tube 412. A multi-faceted slide rod 413 slides within the multi-faceted groove. The lower end of the multi-faceted slide rod 413 is fixedly connected to the bottom surface of the multi-faceted groove via a second compression spring. Multiple stirring plates 414 are evenly fixed around the upper end of the multi-faceted slide rod 413. A driven friction wheel 415 is fixed on the vertical tube 412. The moving friction wheel 415 is connected to the active friction wheel 416 by friction transmission. The active friction wheel 416 is in frictional engagement with the inner side of the cylindrical filter screen 44. The active friction wheel 416 is fixed to the upper end of the linkage shaft 417. The lower end of the linkage shaft 417 rotates on the bottom cover body 411. Multiple cleaning brushes 418 are evenly fixed around the linkage shaft 417 to brush the inner wall of the cylindrical filter screen 44. The linkage shaft 417 is located between the inlet 42 of the cylindrical outer shell 39 and the telescopic slide 45.

[0088] There is a certain friction between the active friction wheel 416 and the cylindrical filter screen 44, so that when the cylindrical filter screen 44 rotates, it can drive the active friction wheel 416 to rotate to a certain extent. Although there is a slippage problem, it does not affect the rotation of the active friction wheel 416. When the active friction wheel 416 rotates, it can drive the linkage shaft 417 to rotate, which in turn drives multiple cleaning brushes 418 to rotate. This allows the multiple cleaning brushes 418 to brush the cylindrical filter screen 44 from the inside. Since the linkage shaft 417 is located between the inlet 42 of the cylindrical outer shell 39 and the telescopic slide 45, the multiple cleaning brushes 418 can push the impurities of the cylindrical filter screen 44 to the front end of the cylindrical filter screen 44. And during the rotation of the active friction wheel 416, it can drive the driven... When the friction wheel 415 rotates, the driven friction wheel 415 can drive the vertical pipe 412 to rotate. When the vertical pipe 412 rotates, it can drive the multi-faceted slide rod 413 to rotate, thereby driving the multiple stirring plates 414 to perform swirling stirring motion. When transporting oil, it can play the role of stirring to reduce viscosity and reduce the probability of oil solidifying on the inner wall of the cylindrical shell 39. Moreover, the setting of this structure does not affect the up-and-down sliding movement of the cylindrical filter screen 44 in the annular slot of the bottom cover 41. When the top cover 40 drives the cylindrical filter screen 44 to move downward, it can press the upper end of the multi-faceted slide rod 413, thereby causing the multi-faceted slide rod 413 to slide into the multi-faceted groove and compress the second compression spring. When the top cover 40 drives the cylindrical filter screen 44 to move upward, the multi-faceted slide rod 413 can return to its original position under the elastic force of the second compression spring.

[0089] The top cover 40 includes a top cover body 401 fixed to the top of the cylindrical outer shell 39. A guide rod 402 is slidably fitted in the central through hole of the top cover body 401. A flow control plug 403 is fixed to the lower end of the guide rod 402. The flow control plug 403 is slidably sealed inside the upper end of the cylindrical outer shell 39 to adjust the opening width of the inlet 42 and outlet 43 of the cylindrical outer shell 39. The flow control plug 403 is fixedly connected to the telescopic slide 45. The top of the cylindrical filter screen 44 rotates on the flow control plug 403; a third compression spring 404 is sleeved on the guide slide rod 402, and the third compression spring 404 is located between the top cover body 401 and the flow control plug 403; a limit nut 405 is threaded on the guide slide rod 402, and the limit nut 405 is stuck above the top cover body 401; an adjusting screw 406 is threaded on the top cover body 401, and the lower end of the adjusting screw 406 is stuck above the flow control plug 403.

[0090] The top cover 40 is equipped with a flow control plug 403. By adjusting the position of the flow control plug 403 sealing the inlet 42 and outlet 43, the opening degree of the inlet 42 and outlet 43 can be adjusted, ultimately regulating the flow rate of the liquid flowing through the invention. During adjustment, rotating the regulating screw 406 changes its contact position with the top cover body 401, thereby actuating the flow control plug 403 to adjust its position and stretching the third compression spring 404. After removing the regulating screw 406, rotating the limiting nut 405 can change its position relative to the guide slide rod. The contact position of 402 is adjusted to control the lowest position of the flow control plug 403, that is, the minimum opening range of the inlet 42 and the outlet 43. Then, the flow control plug 403 can be controlled to block the position of the inlet 42 and the outlet 43 according to the pressure of the liquid entering the invention. When the pressure increases, a greater pressure is generated on the flow control plug 403, which can drive the guide slide 402 to slide upward and compress the third compression spring 404, thereby realizing the adjustment of the opening size of the inlet 42 and the outlet 43 according to the liquid delivery pressure.

[0091] The present invention has been described above by way of example, but the present invention is not limited to the specific embodiments described above. Any modifications or variations made based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A filter (32) for a full-closed intelligent loading and unloading device of a liquid dangerous chemical tank vehicle, characterized in that, The filter (32) includes a cylindrical shell (39), with a top cover (40) and a bottom cover (41) sealed and fixed at the top and bottom of the cylindrical shell (39), respectively; an inlet (42) and an outlet (43) are arranged opposite to each other on the front and rear sides of the cylindrical shell (39); the inlet (42) is connected to the first tube of the liquid inlet pipe (31), and the outlet (43) is connected to the second tube of the liquid inlet pipe (31); a cylindrical filter screen (44) is provided inside the cylindrical shell (39), and the top of the cylindrical filter screen (44) rotates... The top cover (40) is on the bottom cover (41), and the bottom end of the cylindrical filter screen (44) is inserted into the circular slot of the bottom cover (41). The top cover (40) and the bottom cover (41) are fixedly connected by two telescopic slides (45). The two telescopic slides (45) are located in the middle of the inlet (42) and the outlet (43). The inner ends of the two telescopic slides (45) are sealed and slide on the outer surface of the cylindrical filter screen (44), and the outer ends of the two telescopic slides (45) are sealed and slide on the inner side of the cylindrical shell (39). The telescopic slide (45) includes an upper scraper (451), a lower scraper (452), and a first compression spring (453); the upper end of the upper scraper (451) is fixed to the top cover (40), the lower end of the upper scraper (451) slides in a sealed manner in the telescopic groove at the upper end of the lower scraper (452), the lower end of the lower scraper (452) is fixed to the bottom cover (41), one end of the first compression spring (453) is fixed to the lower end of the upper scraper (451), and the other end of the first compression spring (453) is fixed to the bottom surface of the telescopic groove; the inner ends of the upper scraper (451) and the lower scraper (452) slide in a sealed manner on the outer surface of the cylindrical filter screen (44), and the outer ends of the upper scraper (451) and the lower scraper (452) slide in a sealed manner on the inner side of the cylindrical outer shell (39); A ring bevel gear (441) is fitted on the outer surface of the cylindrical filter screen (44). A guide slider is fixed at the inner end of the ring bevel gear (441). The guide slider slides in the longitudinal groove on the outer side of the cylindrical filter screen (44). The ring bevel gear (441) is slidably fitted in the limiting slides at the inner ends of the two lower scrapers (452). The ring bevel gear (441) meshes vertically with the drive bevel gear (442). The drive bevel gear (442) is fixed at the inner end of the transmission shaft (443). The middle part of the transmission shaft (443) is sealed and rotates on the cylindrical shell (39). The outer end of the transmission shaft (443) is connected to the output shaft of the power motor (444) through a coupling. The bottom cover (41) includes a bottom cover body (411) fixed to the bottom of the cylindrical outer shell (39). A vertical tube (412) is rotatably connected to the middle of the bottom cover body (411). A multi-faceted groove is provided at the upper end of the vertical tube (412). The lower end of a multi-faceted slide rod (413) is slidably fitted in the multi-faceted groove. The lower end of the multi-faceted slide rod (413) is fixedly connected to the bottom surface of the multi-faceted groove by a second compression spring. Multiple stirring plates (414) are evenly fixed around the upper end of the multi-faceted slide rod (413). A driven friction wheel (415) is fixed on the vertical tube (412). 415) is connected to the active friction wheel (416) by friction drive. The active friction wheel (416) is in frictional engagement with the inner side of the cylindrical filter screen (44). The active friction wheel (416) is fixed on the upper end of the linkage shaft (417). The lower end of the linkage shaft (417) rotates on the bottom cover body (411). Multiple cleaning brushes (418) are evenly fixed around the linkage shaft (417) to brush the inner wall of the cylindrical filter screen (44). The linkage shaft (417) is located between the inlet (42) of the cylindrical outer shell (39) and the telescopic slide (45). The top cover (40) includes a top cover body (401) fixed to the top of the cylindrical shell (39). A guide rod (402) is slidably fitted in the central through hole of the top cover body (401). A flow control plug (403) is fixed at the lower end of the guide rod (402). The flow control plug (403) is sealed and slides inside the upper end of the cylindrical shell (39) to adjust the opening amplitude of the inlet (42) and outlet (43) of the cylindrical shell (39) through the flow control plug (403). The flow control plug (403) is fixedly connected to the telescopic slide (45). The top of the cylindrical filter screen (44) rotates on the flow control plug (403); a third compression spring (404) is sleeved on the guide slide rod (402), and the third compression spring (404) is located between the top cover body (401) and the flow control plug (403); a limit nut (405) is threaded on the guide slide rod (402), and the limit nut (405) is stuck above the top cover body (401); an adjusting screw (406) is threaded on the top cover body (401), and the lower end of the adjusting screw (406) is stuck above the flow control plug (403).

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