34results about How to "Improve instability" patented technology

The invention provides a low-pressure hydroisomerization / cracking process for preparing bio-based aviation fuel, and relates to the technical field of biomass energy. A three-stage hydrogenation process is adopted, a low-temperature and low-pressure homogeneous hydrogenation method combining an oil soluble catalyst with a suspended bed reactor A and a suspended bed reactor B is adopted in the front stage of step (1) and step (2), low-cost hydrogenation upgrading pretreatment is conducted on high-silicon and high-metal biomass inferior grease, deep fixed bed hydrofining is conducted in the middle stage of step (1) and step (2), and high-silicon and high-metal biomass inferior grease is obtained. In order to improve the yield of light oil products, a rear-section fixed bed hydroisomerization reactor is additionally arranged to carry out isomerization / cracking processing on heavy components.

The invention discloses an enhanced zero-dynamic attack method for an automatic voltage regulator, which comprehensively analyzes influence factors of zero-dynamic attack destructiveness, and enhances the zero-dynamic attack destructiveness by modifying attack signals and sacrificing certain concealment. A transfer function is used for representing a relation model between an input signal and an output signal of the automatic voltage regulator, destructive influence factors of zero-dynamic attacks are analyzed, a coefficient matrix of attack signals is adjusted, additional items are added, enhanced zero-dynamic attack signals are constructed, and the enhanced zero-dynamic attacks are initiated to the automatic voltage regulator. Compared with the existing zero-dynamic attack method, the enhanced zero-dynamic attack designed by the invention is stronger in destructiveness and wider in selectable attack objects.

The invention discloses green low-carbon high-rutting-resistance asphalt concrete and a preparation method thereof, and relates to the technical field of asphalt concrete. The technical scheme is as follows: RAP accounts for 30-40% of the mass of a new aggregate, 53-65 parts of the new aggregate, 3.2-4.1 parts of new asphalt, 4-6 parts of mineral powder, 0.3-0.4 part of high-density oxidized polyolefin, 0.05-0.1 part of a drying agent, 0.05-0.1 part of a lead salt stabilizer, 0.05-0.1 part of an auxiliary agent, 1.5-3 parts of reactive polyurethane, 3-6 parts of a polyester modifier, 0.5-2 parts of a silane coupling agent, 0.1-0.5 part of an antioxidant and 0.5-2 parts of a dispersing agent. Through the synergistic effect of high-density oxidized polyolefin and reactive polyurethane, the performance of aged asphalt in RAP is improved, the rutting resistance of asphalt concrete is improved, VOC emission is reduced, the sustainability of the material is enhanced, the long-term durability is improved, and the service life of a road is prolonged.

The invention relates to the field of data processing, in particular to an energy regulation and control method and system for a wind energy storage power station, and the method comprises the steps: calculating a correction value of an initial smoothing parameter; the product of the initial smoothing parameter and the correction value is used as a correction smoothing parameter of the future moment; and obtaining a prediction result according to the corrected smoothing parameter and an exponential smoothing algorithm, and performing electric energy regulation and control according to the prediction result. The calculation method of the correction value comprises the following steps: taking the wind power and the moment as a two-dimensional data point; calculating the local change degree of the wind power data and the noise degree of the wind power data of the data points within a preset time range; taking a normalization result of the product of the local change degree and the noise degree as the attention degree of the data point; and setting a local window, and taking the ratio of the mean value of the data points with the attention degree greater than a preset threshold value in the local window to the maximum value of the data points in the local window as a correction value. According to the method, the prediction accuracy is improved by adaptively correcting the smoothing parameters.

The utility model relates to the technical field of urea spraying, in particular to a double-rotational-flow valve body for a urea nozzle and the urea nozzle, the double-rotational-flow valve body comprises a body, the body is provided with a first end face and a second end face which are opposite to each other, an inlet groove is formed in the first end face, an outlet groove is formed in the second end face, and the inlet groove is communicated with the outlet groove. The body is provided with a double-rotational-flow runner communicated with the inlet groove and the outlet groove; the double-swirl flow channel comprises an inlet flow channel, an outlet flow channel and a connecting flow channel, the inlet flow channel is arranged on the first end face and communicated with the inlet groove, the outlet flow channel is arranged on the second end face and communicated with the outlet groove, and the connecting flow channel is arranged in the body and connected with the inlet flow channel and the outlet flow channel. According to the double-rotational-flow valve body, the rotational flow strength of the urea nozzle can be improved, the spraying effect is improved, the double-rotational-flow valve body can have high machining consistency, and the reliability of the urea nozzle is improved.

The present application discloses an image processing method, device, storage medium and electronic device, wherein the method comprises: determining a first feature region in an image, obtaining a depth image of the image and a segmented image of a second feature region in the image, the second feature region including the first feature region; obtaining feature depth information of the first feature region according to the depth image; and correcting the second feature region in the segmented image according to the feature depth information of the first feature region. By adopting the present application, the accuracy of the feature region in the segmented image can be enhanced, and the reliability of image processing can be improved.

A walking device for power conductor rotating operation equipment and a control method thereof. The walking device comprises a semicircular plate, lifting mechanisms arranged on both sides of the semicircular plate, telescopic mechanisms, horizontal moving gantry mechanisms connected to the telescopic mechanisms, and driving clamping mechanisms connected to the horizontal moving gantry mechanisms. The control method adopts the walking device, detects obstacles in front in real time by using a detection unit, automatically adjusts the pitch angle by using the rotary connection between the telescopic mechanisms and the semicircular plate, plans a composite obstacle avoidance track by the lateral displacement of the telescopic mechanisms cooperating with the gantry mechanisms according to the shape of the obstacles, and realizes power failure protection by using the mechanical self-locking characteristics of the forward and reverse rotating ball screws and the roller envelope structure. The present application can realize stable obstacle crossing and flexible posture adjustment of the power conductor rotating operation equipment under heavy load conditions, avoid mechanism jamming or wire damage caused by rigid confrontation, and reduce the risk of equipment falling caused by power failure during operation.

This invention discloses a USY molecular sieve, its preparation, and its application. The USY molecular sieve has the following properties: mesoporous pore volume accounts for 30%–60% of the total pore volume; the total acid content is 400–480 μmol / g at 200℃ and 120–150 μmol / g at 350℃. When the molecular sieve of this invention is used as a hydrocracking catalyst, both the catalyst activity and selectivity are significantly improved.

This invention discloses a composite flow control device of needle valve and pressure valve and its working method, which solves the problem that fluid controllers in the prior art all use single control. It has the beneficial effects of realizing the switching between pressure valve and needle valve and avoiding fluid contamination. The specific solution is as follows: A composite flow control device of needle valve and pressure valve includes a support frame, which supports a switching control structure. A needle valve and a pressure valve are arranged sequentially on one side of the switching control structure. The needle valve includes a needle valve body, a first flow channel is provided in the needle valve body, the needle valve body is connected to an isolation shell, an internal rotor is provided in the isolation shell, an external rotor is arranged circumferentially outside the isolation shell, the bottom of the isolation shell is fixedly connected to a screw, and part of the screw is located inside the internal rotor to form a helical drive between the internal rotor and the internal rotor. One end of the internal rotor is provided with a needle-shaped component that can be inserted into the first flow channel. The switching control structure includes a rotating shaft that passes through the support member. The rotating shaft is rotatable and is connected to the sun gear of the planetary gear component.

The application provides a damping type linear generator, a design method and a damping control method, and belongs to the field of rail transit. The damping type linear generator comprises a superconducting coil, an 8-shaped coil and a damping type current collection coil. The damping type current collection coil is arranged in the superconducting coil shell on both sides of the superconducting motorized magnetic suspension train bogie, is used for collecting the energy of the air gap harmonic magnetic field of the 8-shaped coil, and directly supplies power to the on-board electrical equipment and the battery after rectification and filtering, and generates electricity by using the harmonic magnetic field in the train system. The damping type current collection coil is also used for receiving the stable current injected from the on-board power converter converted from the battery. At this time, the damping type current collection coil simulates the superconducting coil magnetic field to generate additional electromagnetic damping force, so as to reduce the vibration amplitude of the bogie in high-speed operation and improve the stability of the superconducting motorized magnetic suspension train in operation. The application improves the stability of the bogie in the operation of the magnetic suspension train.

The application discloses a bolt tightening method based on a vision-language-action model, and belongs to the technical field of intelligent manufacturing. The method comprises the following steps: collecting scene image data of a target bolt and a workpiece region around the target bolt, extracting multi-scale visual features from the collected scene image data, and obtaining a multi-scale visual feature vector Fv; performing semantic analysis on a natural language instruction to obtain a language feature vector Fl; performing cross-modal feature alignment on the Fv and the Fl to obtain an aligned feature vector Fvl; performing action decoding and parameterized mapping processing on the Fvl to generate an action parameter vector Fd; inputting the Fd into a control execution module to perform kinematics solving and control instruction generation, so as to drive an automated execution device to complete a bolt tightening operation. The method can improve the accuracy, adaptability and stability of bolt tightening operation under complex working conditions, and effectively reduce the labor cost of bolt tightening work.

The invention discloses an alloy steel wire rod for a low-cost high-plasticity sorbite tool and a manufacturing method of the alloy steel wire rod. The alloy steel wire rod comprises the following chemical components in percentage by mass: 0.55-0.61% of C, 1.25-1.60% of Si, 0.60-0.80% of Mn, 0.60-0.80% of Cr, less than or equal to 0.35% of Ni, less than or equal to 0.35% of Cu, less than or equal to 0.025% of P, less than or equal to 0.020% of S and the balance of Fe and inevitable impurities. The manufacturing method comprises the steps of steel billet smelting, continuous casting, heating, controlled rolling and controlled cooling, wherein a soft reduction process is adopted for continuous casting, the initial rolling temperature is controlled to be 900-980 DEG C, the high-pressure water descaling pressure is larger than or equal to 19 MPa, the final rolling temperature is 780-840 DEG C, the spinning temperature is 780-840 DEG C, and cooling is conducted through an air cooling roller bed. The steel wire rod is free of precious metal and low in cost, the hardness of a finished product reaches 58-61 HRC, and the product requirement is met.

The invention relates to the technical field of vehicle hydrogen energy power generation, and discloses a vehicle hydrogen-doped compressed natural gas supply system and method.The vehicle hydrogen-doped compressed natural gas supply system comprises a main pipeline connected with a vehicle HCNG engine, and the other end of the main pipeline is connected with a gaseous natural gas regulation and control pipeline and a gaseous hydrogen regulation and control pipeline; the gaseous natural gas regulation and control pipeline comprises a compressed natural gas bottle and a natural gas flow regulating valve connected with the outlet end of the compressed natural gas bottle; the gaseous hydrogen regulating and controlling pipeline comprises a hydrogen cylinder and a hydrogen flow regulating valve connected with the outlet end of the hydrogen cylinder. The flow of compressed natural gas and hydrogen is controlled in real time according to requirements, the proportion of mixed gas is accurately adjusted, the requirements of different hydrogen-doped compressed natural gas (HCNG) fuel engines and the same engine for variable working conditions can be met, safe and reliable operation of the compressed natural gas supply system is ensured, and the service life of the compressed natural gas supply system is prolonged. And the emission performance and the economic efficiency of the compressed natural gas automobile are improved.

The invention provides a preparation method and application of a citric acid modified Cd-MOF material, and belongs to the technical field of metal organic framework materials. The citric acid modified beta-cyclodextrin metal organic framework (CA-beta-CD-MOF) is synthesized by adopting a chemical grafting and steam diffusion method, and the adsorption performance and the reusability of the citric acid modified beta-cyclodextrin metal organic framework (CA-beta-CD-MOF) are systematically researched. Parameters such as concentration, dosage, pH and the like of citric acid are associated, the adsorption effect of the citric acid on heavy elements in a portable solution is investigated, and the adsorption capacities of the citric acid on anionic dye Congo red (CR) and heavy metal ions (Cu < 2 + >) are as high as 900.9 and 287.4 mg.g <-1 > respectively. The citric acid modified beta-cyclodextrin metal organic framework (CA-beta-CD-MOF) obtained by the invention has the characteristics of being simple, green, environment-friendly and reusable, has excellent adsorption performance, and can be used for simultaneously removing organic dye and heavy metal ion pollution in water.

This invention discloses a USY molecular sieve, its preparation method, and its applications. The USY molecular sieve has the following properties: mesoporous pore volume accounts for 35.0%–55.0% of the total pore volume of the molecular sieve, and the most probable pore size is 23–30 nm. When used as a hydrocracking catalyst, this USY molecular sieve exhibits better adsorption, diffusion, and shape selectivity, resulting in superior reaction performance.

The invention discloses mesoporous nano-selenium, a mesoporous nano-selenium drug loading system as well as a preparation method and application of the mesoporous nano-selenium drug loading system. The preparation method of the mesoporous nano-selenium comprises the following steps: (1) dissolving a surfactant in water, then adding Zn, and uniformly stirring to obtain a mixed solution; (2) adding a Na2SeO3 solution and a VC solution into the mixed solution, and carrying out a stirring reaction; and (3) after the reaction is finished, separating the solid, adding the solid into ethanol, carrying out heating reflux for 20-30 hours, after the reflux is finished, taking the solid, and drying the solid to obtain the mesoporous nano-selenium. The preparation method of the mesoporous nano-selenium drug loading system comprises the following steps: adding mesoporous nano-selenium into a mixed solution containing EGCG and CAR, and stirring for 40-90 minutes; and after the stirring is finished, separating the solid to obtain the mesoporous nano-selenium drug loading system. According to the mesoporous nano-selenium and the mesoporous nano-selenium drug loading system disclosed by the invention, accurate treatment on pulmonary arterial hypertension can be realized by inhibiting excessive proliferation of smooth muscle cells and related cell signal channels.

The utility model relates to the technical field of coreless disc generators, in particular to a coreless efficient disc generator coil stator capable of being used for batch production, which comprises a stator upper cover, a stator outer cover main body is arranged on one side of the stator upper cover in parallel, and a plurality of coil positioning blocks are fixedly connected to one end of the surface of the stator outer cover main body. A coil positioning block is arranged on the surface of the stator outer cover body, an upper end cover positioning protrusion is fixedly connected to the top of the coil positioning block, a plurality of penetrating upper end cover positioning holes are formed in the surface of the stator upper cover, and a stator body wire outlet is formed in one side of the surface of the stator outer cover body. The generator coil stator shell is processed in a 3D printing mode, the generator coil stator shell is made of glass fiber nylon and is provided with a plurality of supporting points and fixing points, the stability of stator forming can be enhanced, batch production can be achieved through the technology, and the power generation efficiency can be greatly improved by adding the first layer of coil and the second layer of coil.

The invention discloses a service processing method, device and equipment based on mobile payment, a medium and a product. The invention relates to the technical field of computers. The method comprises the steps of obtaining a request parameter from a target transaction request of a target transaction service sent by a target access party, determining a target configuration identifier according to a target payment channel and a target payment scene in the request parameter, and searching a target configuration item corresponding to the target configuration identifier from a configuration file stored in a preset cache, wherein the target configuration item comprises configuration items corresponding to different configuration identifiers respectively, the configuration items comprise a preset transaction code and a preset message structure corresponding to the preset transaction code, performing message interaction with an online banking side based on the preset transaction code in the target configuration item, and responding to the target transaction request according to a message interaction result. The preset message structure is used for message assembly and / or message analysis. By adopting the technical scheme, the service stability can be enhanced, the maintenance cost can be reduced, and the access timeliness of the access party can be improved.

A sintered body in a cylindrical shape is formed by sintering a raw material powder mainly composed of a metal material, and contains a lubricating oil. An end portion in one axial direction is provided as a first bearing portion, and an end portion in the other axial direction is provided as a second bearing portion. A sliding surface is formed by an inner diameter surface of the first bearing portion and an inner diameter surface of the second bearing portion. An intermediate portion having a larger diameter than the inner diameter surface of the first bearing portion and the inner diameter surface of the second bearing portion is formed in a bearing inner diameter central portion. The first bearing portion, the second bearing portion, and the intermediate portion are provided with a density difference.

The invention discloses a method for treating waste oil sludge based on high-voltage pulse electro-oxidation technology, belonging to the technical field of petrochemical industry. The waste oil sludge to be treated is mixed with chabazite and modified silica microspheres, reacted for 0.5-10h under normal temperature and high-voltage pulse electric field conditions, and purified after oil and water phase separation; the surface of the modified silica microspheres is coated with a composite polyvinylidene fluoride / polymethyl methacrylate polymer layer and modified with carboxyl groups; the invention adds chabazite and modified silica microspheres to the waste oil sludge, and combines the high-voltage pulse electric field to achieve demulsification of the system. The treatment method can combine the demulsification and pulse electro-oxidation steps, thereby simplifying the treatment steps.

The invention discloses a method for preparing a reconstructed LDH catalyst for photoanode water splitting, comprising the following steps: S1, washing an FTO substrate; S2, preparing a solution; S3, preparing an FTO / FeOOH sample; S4, preparing FTO / Sn@FeOOH; S5, preparing FTO / Sn@α-Fe 2 O 3 Preparation of S6, FTO / Sn@α‑Fe 2 O 3 / Ni 3 Preparation of FeOOH; S7, FTO / Sn@α‑Fe 2 O 3 / Ni 3 FeOOH / Ag@SiO 2 / FeOOH photoanode; NiFe‑LDH was introduced by hydrothermal synthesis, and FeOOH was introduced by electrodeposition to improve the stability of NiFe‑LDH catalyst. 2 The plasmon effect of nanoparticles reduces interface defects and significantly improves the performance of PEC‑WS.

The utility model discloses a windproof warm-keeping chemical fiber fabric, which relates to the technical field of fabrics, and is characterized in that the windproof warm-keeping chemical fiber fabric comprises a base layer, a plurality of spoiler strips I and a plurality of spoiler strips II are fixedly connected to the end surface of one side of the base layer, and the horizontal sections of the spoiler strips I and the spoiler strips II are arch-shaped. The multiple first turbulent flow strips and the multiple second turbulent flow strips are linearly arrayed in the warp direction of the base layer to form multiple turbulent flow sets, the opening direction of the first turbulent flow strips in each turbulent flow set is opposite to the opening direction of the second turbulent flow strips in each turbulent flow set, heat preservation strips are arranged between the adjacent turbulent flow sets, and a windproof layer is arranged on the end face of the other side of the base layer. The nylon fiber and the polyester profiled fiber with the hollow circle center section are arranged in the fabric, the overall heat retention property of the fabric is improved by utilizing the characteristics of fluffiness and heat retention of the material, and the arrangement of the windproof layer ensures that the base layer has a good windproof effect.

The utility model discloses a kind of female die shovel machine drive male die oblique extraction sliding block structure, including male die and female die, the male die and female die are provided with the die core that product cavity is enclosed to form, fixed with slider fixed seat on the male die, slider fixed seat inside horizontal direction sliding installation has slider seat, slider fixed seat vertical direction sliding installation has the shovel base that drive slider seat moves back and forth, the shovel base lengthening design, shovel base passes through slider fixed seat and top is fixed to the A plate of female die, shovel base is up with female die opening mould, the end of slider seat close to injection moulded product is equipped with oblique extraction face, oblique extraction face place sliding installation has oblique extraction sliding block, the oblique extraction sliding block top inserts injection moulded product bottom and is equipped with inner forming face. By the above-mentioned mode, the utility model simplifies opening mould action, is driven by A plate opening mould and is further driven slider seat finally realizes oblique extraction sliding block exit, guarantee oblique extraction sliding block movement in limited space, guarantee mould operation stability, shorten forming cycle.

The utility model discloses release paper processing and cutting equipment, which relates to the technical field of release paper cutting, and comprises a box body, a wind pressure machine, a conveying belt, a pressure feeding arm, a connecting rod, a cutting mechanism and a workbench, the wind pressure machine is connected to the top of the box body through a connecting block, and the pressure feeding arm is divided into a connecting disc, a telescopic arm and a mechanical claw which are connected in sequence; a conveying belt is arranged at the top of the box and connected with a threaded hole in the center of the connecting disc in an embedded mode through a connecting rod, the mechanical claw is provided with a damping piece for increasing friction force, and the cutting mechanism comprises a second cutting roller and a first cutting roller which make contact with each other and are parallel to the workbench. The utility model provides a novel assembly mode of the cutting equipment for processing the release paper, so that after the release paper is cut, the cut material is mechanically conveyed to the next process, and the transportation efficiency is slightly accelerated through a simple air pressure machine and a damping piece structure.

The invention relates to the technical field of biological medicines, in particular to application of celecoxib in preparation of a tumor immunotherapy drug, and provides a mechanism that the celecoxib promotes PD-L1 instability through deglycosylation so as to enhance immune response. The invention aims to provide the application of the celecoxib in preparation of the tumor immunotherapy medicine, which proves that the celecoxib promotes PD-L1 instability, improves immune response and realizes in-vitro and survival synergistic anti-tumor effect through deglycosylation, and provides a new treatment method and a solid theoretical basis for combined immunotherapy.

The utility model relates to computer host accessories field discloses an extensible computer host bracket, including base, the inner wall of base is provided with fixed establishment, the inner wall fixed connection of base has extension mechanism, the fixed establishment includes rotary lever, the inner wall of base is rotatively connected in rotary lever, the outer wall fixed connection of rotary lever has the crank handle, the outer wall fixed connection of rotary lever has first bevel gear, first bevel gear has the second bevel gear, the second bevel gear has third bevel gear, in the utility model, through rotary crank handle drive rotary lever rotation, make first bevel gear mesh the second bevel gear, and further drive third bevel gear rotation, drive threaded rod rotation, and threaded block moves along the sliding slot under the threaded rod effect, drives the clamping block to slide and clamps the fixed host through the sliding block in the sliding slot, thereby improved the problem that the host directly placed on the bracket is unstable in the prior art.

The invention discloses a coal sticking prevention device for a horizontal carrier roller, and relates to the technical field of horizontal carrier rollers. Comprising a mounting frame, a supporting frame arranged on the mounting frame, a carrier roller arranged on the supporting frame, a spiral sleeve arranged on the carrier roller, a sliding assembly arranged on the mounting frame, a cleaning assembly arranged on the sliding assembly, a limiting assembly arranged on the sliding assembly and a one-way assembly arranged on the sliding assembly. The rotating assembly is arranged on the one-way assembly; and the driving component is arranged on the mounting frame and comprises a transmission assembly arranged on the mounting frame, a pushing assembly arranged on the mounting frame and a reset assembly arranged on the mounting frame. Through cooperative use of the cleaning component and the driving component, when the carrier roller rotates, the cleaning component can reciprocate on the mounting frame to clean coal dust adhered to the carrier roller, and the problems of belt deviation and unstable operation caused by long-term coal adhesion to the carrier roller are solved.

The application discloses an ultra-stable Y-type molecular sieve and a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing a first aluminum source, a first alkali source, a first Fe source, a first silicon source and water to obtain an Fe-containing Y molecular sieve directing body; (2) mixing a second aluminum source, a second silicon source, a second Fe source, a second alkali source, water and the directing body in step (1) to obtain a gel; (3) performing crystallization treatment on the gel in step (2); and (4) performing ammonium exchange, hydrothermal treatment and acid washing treatment on the crystallization product obtained in step (3) to obtain the ultra-stable Y-type molecular sieve. When the ultra-stable Y-type molecular sieve prepared by the method is used in a hydrocracking catalyst, the activity and selectivity are both significantly improved.

The invention discloses an image quality evaluation method and device, equipment and a storage medium, and relates to the technical field of image processing, and the method comprises the steps: obtaining a target image obtained by photographing a current scene, and determining the local gradient energy of pixel points in the target image; determining a target pixel point from the pixel points of the target image based on a preset gradient statistical mode, and performing accumulation calculation on target local gradient energy corresponding to the target pixel point to obtain image change energy of the target image; and determining an effective gray scale range of the target image by using a preset brightness statistical mode, and performing standardization processing on the image change energy based on the effective gray scale range to determine the definition of the target image. Therefore, the influence of noise on image quality evaluation is reduced by using the local gradient, and the influence of illumination variation on image quality evaluation is reduced by using the effective gray scale range standardization, so that the image quality evaluation is accurately carried out.

The utility model discloses screening equipment for ammonium molybdate production, and belongs to the technical field of ammonium molybdate production. Comprising a bottom plate, the bottom plate is upwards movably connected with a supporting frame, and a screening barrel is arranged in the supporting frame; a lifting plate is arranged in the supporting frame in an up-down sliding mode, and a crushing motor is arranged on the lifting plate. An output shaft of the crushing motor is fixedly connected with a rotating shaft located above the screening barrel, and the rotating shaft is fixedly connected with a crushing rod. A vibrating motor is arranged on the screening barrel, and a screening net is arranged at the bottom of the screening barrel; the bottom plate is fixedly connected with a fixing column upwards, and the two sides of the screening cylinder are fixedly connected with connecting blocks. The connecting block is slidably arranged on the fixing column in a sleeving mode, and the fixing column is sleeved with a vibration spring located below the connecting block. The movable crushing structure is arranged above the screening structure, residual cakes can be crushed after most ammonium molybdate powder is screened, the crushing pressure can be reduced, and the crushing efficiency and the screening efficiency are improved.