762 results about "Diaphragm pump" patented technology

In order to improve the stability and reliability of the micro diaphragm pump, the invention provides the micro diaphragm pump with the columnar bubble and liquid monitoring function. The channel is formed in the pump cavity, the valve body is installed in the channel, the valve body is composed of the upper layer, the middle layer and the friction layer, the sensing part is arranged on the middle layer, the sensing area is formed through cooperation of the friction layer and the sensing part, and then columnar bubbles and liquid in the micro diaphragm pump are monitored. The device is small in size, high in energy density, high in controllability and capable of monitoring columnar bubbles and liquid.

The invention discloses an underwater multi-mode mobile robot equipped with a flexible bionic gripper, which integrates three operation modes of propeller propulsion, six-foot crawling and target object grabbing, and realizes'movement-attachment-operation 'integrated collaboration. The robot main body adopts a five-thruster vector layout and has a five-degree-of-freedom motion capability; and six groups of three-degree-of-freedom mechanical feet and two groups of three-degree-of-freedom mechanical arms are arranged outside, and a cruising mode, a crawling mode or a grabbing mode can be automatically switched according to tasks. A coordination dual-network hydrogel bionic sucker and a flexible gripper are integrated at the foot end and the arm end, and controllable adsorption and desorption are achieved through a diaphragm pump. The control system generates a rhythm signal based on the central mode generator, and coordinates multi-module actions of paddles, legs and arms in combination with inverse kinematics solution. The robot is suitable for tasks such as wide water area cruising, complex terrain exploration, environment maintenance and seabed sampling, has high maneuverability and high integration degree, and provides an innovative platform for underwater fine operation.

The application discloses a high-pressure diaphragm pump one-way valve structure multi-objective optimization method based on digital twinning, and belongs to the technical field of pump valve optimization design; the application collects geometric size parameters and material properties of a high-pressure diaphragm pump one-way valve, and establishes a simulation model; an Isight and ANSYS joint simulation method is used to generate sample points and calculate response values; an agent model is constructed according to response values of each group of sample points, calculation efficiency is improved, and a digital twinning model is constructed; a one-way valve structure multi-objective optimization model is established by taking the maximum equivalent stress of a valve core and the minimum maximum flow velocity of a valve gap flow field as objective functions, a genetic algorithm is used for solving, the best structure parameter combination of the one-way valve impact resistance performance is obtained, and finally, result verification is carried out; the application can realize high-precision simulation of a one-way valve operating state and solving of optimal structure parameters of impact resistance performance, thereby guiding one-way valve structure design, reducing product research and development time cost, and improving service life.

The present application provides an oil-gas separation apparatus capable of implementing complete degassing and methods. The apparatus comprises: a piston cylinder and a degassing cylinder, a degassing solenoid valve being arranged between the degassing cylinder and the piston cylinder, one end of the degassing solenoid valve extending into the interior of the piston cylinder, and the other end thereof being in communication with the degassing cylinder; a variable speed diaphragm pump, an air intake end thereof being in communication with the atmosphere and an air discharge end thereof being in communication with the degassing cylinder for drawing ambient air, and used for cleaning a gas path of the oil-gas separation apparatus, and providing power for the degassing cylinder, thereby replacing a design involving a carrier gas cylinder or a gas generator; and a main control module. According to the present application, the piston cylinder, the degassing cylinder, the degassing solenoid valve, and the variable speed diaphragm pump are integrated and are uniformly controlled by the main control module, so that high-efficiency oil and gas separation is implemented. A unique degassing control method and a concentration calculation method are designed, so that fast and efficient degassing is implemented, nearly complete degassing is achieved without correcting a degassing rate, a mathematical model for inverse calculation of an oil sample concentration on the basis of a gas concentration is simplified, and concentration conversion is convenient.

A novel ball valve on a diaphragm pump comprises a ball seat, a ball cage and a valve ball. The ball cage comprises a positioning ring, a supporting column, a connecting ring and a limiting ring. The four supporting columns are annularly arranged at intervals. The positioning ring, the supporting column, the connecting ring and the limiting ring are integrally formed. The end, away from the positioning ring, of the supporting column and the side, facing the valve ball, of the supporting column are provided with an inclined face part, the inclined face of the inclined face part faces the valve ball, and the spherical face of the valve ball abuts against the four inclined face parts. According to the novel ball valve on the diaphragm pump, a one-way channel of the valve ball is formed through the four supporting columns which are annularly arranged at intervals, and the maximum flow of a fluid medium can be guaranteed while movement of the valve ball is limited. And during assembly, the ball cage of the corresponding model can be selected according to the flow performance required by the pump, so that the simple and low-cost matching of the overall flow characteristic of the pump can be realized, and the main structure of the pump body or the ball valve does not need to be changed.

This invention relates to a sampling device and method for sulfur hexafluoride (SF6) and its mixed gases used in electrical equipment. The sampling device includes an equipment connection module, a sampling module, a gas filling module, and a vacuuming module. The equipment connection module, used to connect the electrical equipment and the gas sampler, consists of an equipment connection valve, a diaphragm pump, and corresponding pipelines. The sampling module, used for gas buffering, consists of a sampling cylinder, a pressure detection unit, a sampling valve, a gas filling valve, a tail gas valve, and corresponding pipelines. The gas filling module, used to fill the sampling container, consists of a booster pump, a sampling container connection valve, and corresponding pipelines. The vacuuming module, used for vacuuming and tail gas collection, consists of a vacuum pump, a tail gas collection device, and its connection valves. The sampling method utilizes appropriate flushing and vacuuming methods when the gas pressure is higher or lower than 0.2 MPa. This sampling device and method can improve the accuracy of sampling sulfur hexafluoride gas or sulfur hexafluoride mixed insulating gases.

The invention discloses a planetary structure type flexible gear ring diaphragm pump, and belongs to the technical field of pumps, the planetary structure type flexible gear ring diaphragm pump comprises a pump body, a motor assembly is arranged in the pump body, an output shaft of the motor assembly is connected with a sun gear, a plurality of planetary gears are rotatably connected in the pump body, a flexible gear ring is arranged in the pump body, and the planetary gears are meshed and matched with the sun gear and the flexible gear ring. A fluid chamber seat is fixed at the end part of the pump body, a three-dimensional diaphragm is fixed in the fluid chamber seat, a plurality of flexible diaphragm chambers are arranged in the three-dimensional diaphragm along the outer circumferential direction of the flexible gear ring, and one-way valve groups are arranged on the flexible diaphragm chambers; planetary transmission and the positive displacement pump principle are combined, controllable deformation of a flexible component is used for replacing a traditional rigid connecting rod or eccentric wheel mechanism, and a brand-new internally-balanced driving mode is provided for fluid conveying; compared with a traditional eccentric wheel driving diaphragm pump, stress of the planet wheels on the two sides is always in internal balance, the running stability and reliability are greatly improved, and the motor cost is optimized.

The invention relates to the technical field of diaphragm pump automatic control, in particular to a diaphragm pump self-adaptive pressure relief and stabilization control method based on pressure feedback, which comprises the following steps: configuring reference parameters before starting and detecting faults of a pressure sensor, a pump driving unit and an electromagnetic pressure relief valve; obtaining an effective pressure value through moving average filtering; dynamically adjusting PID parameters according to the pressure deviation and the change trend; and pump rotating speed adjustment, graded pressure relief or emergency shutdown are executed according to the normal area, the early warning area and the overpressure area. The method effectively improves the pressure stabilization precision and the pressure relief response flexibility, comprehensively avoids the equipment fault risk, adapts to the working conditions of multiple fields, and remarkably enhances the reliability and practicability of system operation.

The utility model relates to a diaphragm pump noise reduction silencer which comprises a first-stage silencing pot, an air inlet assembly and an air exhaust assembly, and a first silencing layer is arranged on the inner wall of the first-stage silencing pot; the air inlet assembly comprises a drying cylinder and an air inlet pipe, one end of the drying cylinder is inserted into the first-stage silencing cylinder, a plurality of second air inlet holes are formed in the cylinder wall, located in the first-stage silencing cylinder, of the drying cylinder, and one end of the air inlet pipe is inserted into the drying cylinder from the other end of the drying cylinder; a plurality of first air inlet holes are formed in the pipe wall, located in the drying cylinder, of the air inlet pipe, the other end of the air inlet pipe is connected with an exhaust port of the diaphragm pump, and a water absorption layer is arranged in a cavity between the air inlet pipe and the drying cylinder. According to the diaphragm pump, moisture in airflow exhausted by the diaphragm pump is absorbed through the water absorption layer of the air inlet assembly so as to dry the airflow, the first silencing layer is matched with the partition plates to conduct primary silencing and noise reduction, secondary silencing and noise reduction are conducted through the second silencing layer, then the airflow is exhausted, the silencing and noise reduction effect is improved, and the service life of a silencer is prolonged.

The invention relates to the technical field of diaphragm pump aging test, and discloses a two-parameter intelligent closed-loop diaphragm pump aging test system and method. According to the method, a temperature spectrum and a vibration spectrum are obtained through fast Fourier transform, a frequency domain coherence coefficient is calculated to identify temperature-vibration coupling characteristics, a resonance frequency band and a drift trend thereof are identified in real time by adopting a spectrum peak tracking algorithm, and a multi-objective optimization function considering aging acceleration efficiency and resonance risk is constructed. And solving the optimal temperature stress amplitude and vibration stress frequency by using a particle swarm algorithm, generating a stress loading instruction avoiding a resonance area through a self-adaptive PID controller, and dynamically updating model parameters based on a closed-loop feedback mechanism. According to the invention, the problem of resonance effect amplification caused by traditional fixed frequency stress loading is solved, and refined adaptive stress control is realized.

The utility model discloses an array type piezoelectric diaphragm pump, and relates to the technical field of piezoelectric diaphragm pump production and design. The device comprises a diaphragm pump, the diaphragm pump is formed by combining pump bodies, a water inlet pipe, a water outlet pipe and a fixing seat, the pump bodies are communicated through a guide pipe, a rapid positioning unit is arranged below the pump bodies, the fixing seat in the rapid positioning unit is slidably connected to the interior of a bottom plate, a convex block is fixedly connected to the top of the bottom plate, and a concave block is fixedly connected to the bottom of the fixing seat. The protruding block is movably connected with the concave block in a clamped mode, and the clamping piece is arranged in the bottom plate and movably connected with the fixing base in a clamped mode. According to the device, the position of the pump body is limited through the bottom plate, the pump body can be rapidly positioned through cooperation of the sliding grooves and the bottom plate, the installation efficiency is improved, unnecessary abrasion to the pump body is avoided, original bolt fixing is replaced through cooperation of the protruding blocks, the concave blocks and the clamping pieces, the fixing effect cannot be affected by vibration, and the requirements of users are met.

The invention provides a foam fire extinguishing device based on an unmanned aerial vehicle, and relates to the field of unmanned aerial vehicles. The foam fire extinguishing device based on the unmanned aerial vehicle comprises an unmanned aerial vehicle body, a control unit is arranged at the front end of the inner wall of the unmanned aerial vehicle body, mounting frames are fixedly connected to the four corners of the lower end of the unmanned aerial vehicle body, and fixing frames are fixedly connected to the outer walls of the mounting frames. According to the unmanned aerial vehicle, the mixing box, the gas tank and the diaphragm pump are integrated to form an autonomous liquid and gas supply system, the constraint of traditional mooring water supply is eliminated, and the maneuverability and the operation range of the unmanned aerial vehicle in complex terrains such as Zhangjiang are greatly improved; the telescopic conveying cylinder adopts a reducing design of a 32mm rear section and a 25mm front section, and is matched with the assistance of high-pressure gas in a gas tank, so that the foaming effect of the foam is obviously enhanced, and the fire extinguishing efficiency of the A-type foam is improved; the vertical nozzles and the transverse nozzles are combined with the flow distribution design of the electric control valve, so that multi-mode injection with large-area coverage and accurate spot injection can be realized, and the device is suitable for different fire scenes.

A diaphragm pump includes a driving mechanism including a crank body fixed to the rotating shaft of a motor, a driving shaft that is fixed to the crank body and inclined, and a driving body rotatably supported by the driving shaft via a bearing member. The driving body includes a shaft portion that stores the bearing member, and an arm portion connected to the deformation portion of a diaphragm. The bearing member includes a first bearing member close to the crank body, a second bearing member spaced apart from the crank body, a shaft hole in which the driving shaft is rotatably fitted, and an oil reservoir formed at a boundary between the first and second bearing members. The shaft hole includes a through hole formed in the first bearing member, and a non-through hole formed in the second bearing member.

The utility model relates to a carburetor capable of improving starting effect, which comprises a carburetor body, a diaphragm pump is arranged on the outer side portion of the carburetor body, an upper oil port is arranged on the diaphragm pump, an oil inlet hole channel communicated with the upper oil port is arranged on the carburetor body, and the oil inlet hole channel is communicated with an oil cavity in the diaphragm pump. A manual oil recharging pump is arranged on the outer side portion of the carburetor body, an oil inlet of the manual oil recharging pump is communicated with the oil inlet hole channel, and an oil outlet of the manual oil recharging pump is communicated with an oil cavity in the diaphragm pump. The carburetor with the improved starting effect is novel in structure and reasonable in design, on the basis of an original diaphragm pump, the manual oil supplementing pump is connected in parallel, when an engine is started, the oiling speed can be increased by rapidly pressing the manual oil supplementing pump, the starting speed of the engine is greatly increased, and the starting effect is good.

The application relates to the technical field of diaphragm pumps, and discloses a diaphragm pump capable of self-balancing pressure pulsation and a medical device. The diaphragm pump comprises a pump body, a pressure acquisition device, a volume adjusting assembly and a control device. The pump body is provided with a liquid inlet, a liquid outlet, an inlet buffer cavity and an outlet buffer cavity. The pressure acquisition device is configured to acquire pressure data of the liquid inlet and the liquid outlet. The volume adjusting assembly can dynamically change the volume of the inlet buffer cavity and the volume of the outlet buffer cavity. The control device is configured to determine the pressure pulsation amplitude of the liquid inlet and the liquid outlet based on the pressure data of the liquid inlet and the liquid outlet, and to control the volume adjusting assembly to dynamically configure the volume of the inlet buffer cavity and / or the volume of the outlet buffer cavity based on the pressure pulsation amplitude. The application can eliminate pressure pulsation without increasing the volume and the structural complexity.

1. The name of the design product: large flow diaphragm pump. 2. The use of the design product: for suction and discharge of chemical agents. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

The utility model discloses an internal circulation distillation device which comprises a distillation still, a diaphragm pump, a first electric control valve and a second electric control valve, a heating mechanism is arranged in the distillation still, an inlet of the diaphragm pump is communicated with the distillation still through a first pipeline, an inlet of the first electric control valve is communicated with an outlet of the diaphragm pump through a second pipeline, and the diaphragm pump is communicated with the second electric control valve through a third pipeline. An outlet of the first electric control valve is communicated with the distillation still through a third pipeline, an inlet of the second electric control valve is communicated with an outlet of the diaphragm pump through a fourth pipeline, an outlet of the second electric control valve is communicated with a fifth pipeline, and the first electric control valve and the second electric control valve are electrically connected to a preset controller. And the controller is used for controlling one of the first electric control valve and the second electric control valve to be switched on. The distillation device can improve the distillation efficiency and is convenient for discharging waste liquid.

The invention belongs to the technical field of pump body conveying, and particularly discloses a diaphragm pump conveying device and an organic fluorine intermediate synthesis conveying method.The diaphragm pump conveying device comprises a base, a pump body, a driving part, diaphragm agitating mechanisms, a discharging pipe and a feeding pipe; one end of the driving part penetrates through the interior of the pump body to drive the diaphragm agitating mechanisms to move, the driving part is fixedly installed above the base, the sides, away from each other, of the two diaphragm agitating mechanisms communicate with vertical pipes, the discharging pipe is located above the two vertical pipes, and the feeding pipe is located below the two vertical pipes; the problems that vibration leakage occurs, sealing is not stable, and leakage is difficult to perceive are solved, sealing is reliable, vibration reduction and looseness prevention are achieved, monitoring is timely, and the organic fluorine intermediate conveying device is suitable for safe conveying of organic fluorine intermediates.

The utility model discloses an abrasion -resistant coal water slurry feed diaphragm pump relates to coal water slurry conveying technical field, including fixed base, four pump body housings are fixedly connected through the fixed stand on the fixed base, both ends of each pump body housing are fixedly connected with fixed end cover in thread, and both sides fixed end cover correspond fixedly connected with inner hose diaphragm and outer hose diaphragm between pump body housing inner chamber, the inner hose diaphragm is inserted to the center of outer hose diaphragm, and one side fixed end cover is buried with pressure sensor between annular gap end position between inner hose diaphragm and outer hose diaphragm, and the structure of double hose diaphragm makes the coal water slurry that is transported only with inner hose diaphragm inside and modular one -way valve contact, and is completely isolated with the pump cavity of pump body housing. Effectively avoid the corrosion and abrasion of the pump cavity of pump body housing to coal water slurry. The deformation of inner hose diaphragm and outer hose diaphragm is closer to the expansion and shrinkage of radial, avoids stress concentration, and makes fatigue life greatly improve.

The invention provides a vacuum diaphragm pump which is provided with a cavity, different spaces are formed in the cavity, the vacuum diaphragm pump is provided with a steam extraction channel and a process gas extraction channel which are independent of each other, and the steam extraction channel and the process gas extraction channel communicate with the different spaces of the cavity correspondingly. Two different fluids (such as steam and process gas) can be extracted respectively through the steam extraction channel and the process gas extraction channel which are independent of each other, so that the two different fluids are prevented from flowing through the same extraction channel to react; deposited powder (namely process gas) is prevented from being adhered to the inner wall of the extraction channel or the inner wall of the cavity under the action of steam, so that the pollution and blockage of the vacuum pump cavity caused by sediments are prevented, the performance of the vacuum diaphragm pump is ensured, and the service life of the vacuum diaphragm pump is prolonged; besides, different temperature control can be carried out on different channels according to different extracted process objects, so that the stability of the process gas in the channels is ensured.

The application discloses a cell liquid subpackaging method, which is applied to a cell liquid subpackaging system. The cell liquid subpackaging system comprises a peristaltic pump, a subpackaging bag, a calibration container and a diaphragm pump which are sequentially connected in the extension direction of the same subpackaging pipeline. The subpackaging method pumps cell liquid into the subpackaging bag first, then discharges the mixed cell liquid and the residual gas in the subpackaging bag into the subpackaging pipeline through the backflow mode, discharges the residual gas mixed in the subpackaging pipeline through the calibration container and the diaphragm pump on the subpackaging pipeline, obtains the cell liquid after gas-liquid separation, and then pumps the cell liquid after gas-liquid separation into the subpackaging bag again, so that the subpackaging product without residual bubbles is obtained, and the subpackaging quality is improved.

The utility model discloses an aluminum-foil paper water-based composite material conveying system which comprises a liquid storage tank, a pneumatic diaphragm pump and a dispersion tank, a liquid outlet of the dispersion tank is provided with a liquid discharge pipe, and the liquid discharge pipe is provided with a liquid discharge valve; the inlet end of the pneumatic diaphragm pump is communicated with the liquid outlet of the liquid storage tank through a pipeline I, the pipeline I is provided with a valve I, the pipeline I is communicated with a pipeline II, the pipeline II is provided with a valve II, and the outlet end of the pneumatic diaphragm pump is connected with the liquid inlet of the dispersion tank through a pipeline III; a liquid return pipe is communicated with the liquid discharge pipe, and a liquid return valve I is arranged on the liquid return pipe; the other end of the liquid return pipe is communicated with the upper part of the liquid storage tank; a liquid return valve II is arranged at the joint of the liquid return pipe and the liquid storage tank; the liquid return pipe is communicated with a cleaning liquid emptying pipe, and a cleaning liquid emptying valve is arranged on the cleaning liquid emptying pipe. The utility model has the advantages that various risks and physical power consumption caused by the traditional manual carrying mode are effectively reduced.

1. The name of the design product: diaphragm pump. 2. The use of the design product: the design product is mainly used for conveying fluid. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

The application discloses a device and method for preparing graphene by electrophoretic hydrodynamic cavitation liquid phase stripping, which comprises a graphite flake raw material slurry tank, a diaphragm pump, a high-pressure pump, an electrophoretic high-pressure liquid phase stripping assembly, a first cyclone separator, a second cyclone separator, a graphene slurry tank and a wastewater tank; the diaphragm pump and the high-pressure pump are installed on a pipeline between the graphite flake raw material slurry tank and an input end of the electrophoretic high-pressure liquid phase stripping assembly; the first cyclone separator and the second cyclone separator are installed on a pipeline connected to an output end of the electrophoretic high-pressure liquid phase stripping assembly; a discharge port of the first cyclone separator is communicated with a feed port of the second cyclone separator; and a discharge port of the second cyclone separator is communicated with the graphene slurry tank. Compared with a traditional chemical method, the device has the advantages of green environmental protection, less defects of graphene structure and better preservation of characteristics of graphene; and compared with a traditional physical method, the device has the advantages of high production efficiency and better dispersibility.

The utility model discloses a device for collecting floating oil in an alkali liquor tank, which relates to the technical field of degreasing and cleaning of copper plate strips and comprises an alkali liquor tank body, alkali liquor is arranged in the alkali liquor tank body, a stainless steel floating ball support frame is arranged at the top end of the alkali liquor in a floating manner, and a stainless steel pipe is fixedly connected to the middle of the stainless steel floating ball support frame. The top end of the stainless steel pipe is fixedly connected with a stainless steel funnel-shaped oil absorber, the top end of the stainless steel floating ball supporting frame is provided with a stainless steel hollow floating ball, and the stainless steel hollow floating ball can guarantee that the stainless steel hollow floating ball cannot incline when the liquid level floats up and down. Through the stainless steel floating ball supporting frame, the stainless steel funnel-shaped oil absorber, the semicircular flow guide opening and the stainless steel hollow floating ball, the diaphragm pump can be controlled to float up and down along with the liquid level change caused by the starting of equipment, and deflection is avoided, so that floating oil on the surface of alkali liquor is automatically skimmed, and the working efficiency is improved. And automatic floating oil skimming can avoid direct contact between personnel and alkali liquor, so that the risk of personnel injury is reduced.

1. The name of the design product: double cylinder double action hydraulic hose diaphragm pump. 2. The use of the design product: the design is a double cylinder double action hydraulic hose diaphragm pump using compressed air or liquid as power source. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

1. The name of the design product: diaphragm pump accessories. 2. The use of the design product: diaphragm pump accessories for transferring fluid. 3. The design features of the design product: in shape. 4. The picture or photo that best shows the design features: perspective view 1.

The application belongs to the technical field of pump detection, and discloses a diaphragm pump automatic detection equipment and a control method, wherein the diaphragm pump automatic detection equipment comprises a rack, a cleaning mechanism and a detection mechanism; the rack is provided with a controller, a conveying belt, a receiving seat, a visual sensor, a moving assembly, a rotating part and a clamping jaw; the visual sensor is used for shooting the diaphragm pump; the moving assembly is used for driving the clamping jaw to move between the conveying belt and the receiving seat; the rotating part is used for driving the clamping jaw to rotate; and the clamping jaw is used for clamping the diaphragm pump; the cleaning mechanism comprises a cleaning assembly and a drying assembly; the cleaning assembly comprises a first driving part and two brushes; the first driving part is used for driving the two brushes to rotate; the drying assembly comprises a second driving part and two water absorption rollers; and the second driving part is used for driving the two water absorption rollers to rotate; and the detection mechanism is used for detecting the diaphragm pump. The diaphragm pump automatic detection equipment can realize automatic detection of the diaphragm pump, and can improve the detection efficiency and accuracy.

The utility model discloses a lithium primary battery electrolyte circulation purification device relates to lithium primary battery production technical field. It includes purification tank body, diaphragm pump, electrolyte tank, ultrasonic flowmeter and corrosion -resistant ball valve etc. The purification tank body is built -in spiral shape winding lithium belt, and the outside is twisted electric heating wire temperature control, makes electrolyte through diaphragm pump and circulates between electrolyte tank and purification tank body. In the circulation, lithium belt and electrolyte water, harmful metal ion take place replacement reaction, and ultrasonic flowmeter monitors flow. The device can efficiently remove impurity, improve electrolyte purity, and it is convenient for maintenance, can guarantee lithium primary battery performance stability, and the practicality is strong.

A pure pneumatic high-precision oil filtering device comprises an equipment shell, a control assembly, a diaphragm pump, a filtering assembly and a connecting assembly. The equipment shell comprises a fixed frame and a side plate. The control assembly comprises a pneumatic three-way ball valve and a pneumatic ball valve. And the filtering assembly comprises a pre-filter and an oil removal filter. The connecting assembly comprises a first oil inlet pipe, a second oil inlet pipe, a first oil conveying pipe, a second oil conveying pipe, a backflow pipe, a first oil outlet pipe, a second oil outlet pipe and a liquid outlet pipe. Compared with the prior art, the pre-filter is arranged to primarily filter the filtrate, large-particle impurities in the filtrate are filtered, the service life of the decolorizing and filtering equipment is prolonged, and the filter residue cleaning frequency is increased. Meanwhile, the return pipe is arranged, so that filtrate filtered by the oil removal filter can be circularly filtered for multiple times, and a pneumatic ball valve and a pneumatic three-way ball valve are used for controlling, so that a user can control the filtering times in real time according to the actual decoloration effect of the filtrate.