55results about How to "Quick unblock" patented technology

The present invention discloses a filter for dusty oil and gas, comprising a cylinder, the top of which is connected to a top cover, the bottom of which is connected to a cone, a first bypass port and a second bypass port are provided on the top cover and the cylinder, the two are connected through a pipeline to form an external passage, and a bypass valve is provided on the pipeline; a plurality of filter elements are provided in the cylinder; a first heating component and a second heating component are provided on the outer wall of the cylinder and the cone. The filter of the present invention, under the joint action of the heating component and the external passage, can not only ensure that the interior of the cylinder and the cone always maintains a relatively high temperature, but also can timely dredge the filter element during operation, thereby achieving effective separation of dust and oil and gas, and effectively avoiding abnormal phenomena such as negative pressure inside the filter, having the advantages of high processing efficiency, good filtering effect, low maintenance cost, high safety, long service life, etc., can effectively remove dust in the oil and gas when used for filtering dusty oil and gas, has high use value, and good application prospects.

The utility model relates to the field of filter screen devices, in particular to an energy-saving filter screen device for air conditioning, which comprises an air supply box, an end flange of the air supply box is connected with a filter pipe, an end flange of the filter pipe is connected with a three-way pipe, one end flange of the three-way pipe is connected with an air supply pipe, and a pipe body of the air supply pipe is provided with an electric control valve. A three-way pipe is arranged at one end of the filter pipe, a flange at the other end of the three-way pipe is connected with a blow-off pipe, a stop valve is arranged on a pipe body of the blow-off pipe, an air supply assembly is arranged in the air supply box, and a filter screen assembly and a dredging assembly are arranged in the filter pipe. The defects that the ventilation effect is not ideal due to blockage of the filter screen, and electric energy consumption needs to be enhanced to achieve the expected ventilation effect are effectively overcome, energy saving is facilitated, the filter screen assembly does not need to be disassembled, use is convenient, and dredging is convenient.

The utility model belongs to the technical field of ore crushers, and particularly relates to an ore crusher with an anti-blocking structure, which comprises a base and a crusher body, the crusher body is fixed on the upper surface of the base, an opening at the top end of the crusher body is fixedly connected with a blanking hopper, and an anti-blocking mechanism is arranged in the blanking hopper; according to the utility model, the anti-blocking mechanism is arranged to adjust the size of the blanking opening in the crusher body, so that larger ores can be automatically discharged through the discharge port of the blanking hopper and move along the material guide table, the interior of the blanking hopper can be quickly dredged, and the size of the blanking opening can be flexibly adjusted through the design of automatically dredging the blanking hopper and flexibly adjusting the size of the blanking opening. The ore crusher has high flexibility, can improve the production efficiency of the ore crusher, reduces manual intervention and downtime, can adapt to ore raw materials of different sizes and types, and improves the universality and adaptability of the equipment.

The utility model discloses a preparation device for nano corundum abrasive, which relates to the technical field of preparation devices for nano corundum abrasive, and comprises a box body, specifically, the bottom of the box body is fixedly connected with a support plate, the inner wall of the box body is rotatably connected with a crushing roller, the inner wall of the box body is provided with a first groove, and the first groove is T-shaped; the two first grooves are distributed in the box body in a bilateral symmetry mode, second connecting plates are slidably connected to the inner walls of the first grooves, the second connecting plates are consistent with the first grooves in shape and size, movable grooves are formed in the inner side walls of the second connecting plates, filter plates are slidably connected to the inner walls of the movable grooves, and first springs are fixedly connected to the tops of the filter plates; the top of each first spring is fixedly connected with the inner top wall of the movable groove, the two sets of first springs are arranged, and each set of first springs comprises two first springs, the discharging port can be quickly dredged when materials block the discharging port, and the materials can be smoothly discharged.

A fracturing pipe fitting relates to the technical field of oil field downhole tools and comprises an anchoring and packing integrated tool, the anchoring and packing integrated tool comprises a central pipe, an anchoring slip assembly, a sealing rubber sleeve assembly and a setting and unsetting assembly, the anchoring slip assembly and the sealing rubber sleeve assembly are slidably arranged on the outer side of the central pipe in a sleeving mode and abut against each other, and the anchoring slip assembly and the sealing rubber sleeve assembly abut against each other. A first pressure transmitting hole used for pushing the anchoring slip assembly to move is formed in the center pipe. The setting and unsetting assembly comprises an outer sleeve, fixed teeth, elastic teeth, an unlocking ring and a trigger ring, the unlocking ring moves downwards during setting to enable the elastic teeth to be meshed with the fixed teeth, the unlocking ring is limited through an elastic limiting angle pin, and the elastic limiting angle pin is pressed into the center pipe by pushing the trigger ring during unsetting to enable the elastic teeth to be meshed with the fixed teeth. Therefore, the unlocking ring separates the elastic teeth from the fixed teeth. According to the invention, timely anchoring during setting of the packer is truly realized, and timely unanchoring during unsetting of the packer is realized, so that the protection effect of the anchor on the packer is the most ideal.

The invention relates to the technical field of magnesium powder transportation, in particular to a magnesium powder conveying device which comprises a material distributing tank and a conveying pipe, the conveying pipe is a turbulent flow double-sleeve pipe and comprises an outer sleeve pipe and an inner sleeve pipe connected to the top of the inner wall of the outer sleeve pipe, and openings evenly distributed in the conveying direction at intervals are formed in the bottom of the inner sleeve pipe; a ring set is fixedly connected into the inner sleeve and comprises a drainage ring and a stop ring, a mounting ring is elastically connected to the side, away from the conveying direction, of the stop ring, an iris mechanism is arranged in the mounting ring, and a flow guide plate is rotationally connected to the side, away from the conveying direction, of the mounting ring. A driving assembly I for driving the iris mechanism to change the size of the through hole and a driving assembly II for driving the flow guide plate to rotate are arranged on the inner sleeve. According to the magnesium powder conveying device, magnesium powder is not prone to being accumulated and agglomerated in the conveying pipe, and when the accumulation and blocking phenomena occur, the magnesium powder can be rapidly dispersed, the conveying pipe can be dredged, and normal conveying of powder is guaranteed.

The invention relates to the technical field of water conservancy projects, in particular to an energy-saving and environment-friendly canal sundry intercepting and cleaning device which comprises a frame integrally provided with an intercepting net in the middle and installed in a canal. The device further comprises a moving frame, the front side of the moving frame is connected with a mounting frame through a first spring, and the middle of the mounting frame is elastically and slidably connected with two tool rests in a penetrating mode. A material gathering plate is hinged to the end part of the front side of the material collecting plate; the cutting auxiliary assembly is arranged at the edge of the frame and on the knife rest; the energy-saving and environment-friendly water channel sundry intercepting and cleaning device comprises a frame, a material collecting plate arranged on the frame, a material gathering assembly arranged on the material collecting plate and used for gathering sundries collected by discharged water, and a cleaning assembly arranged on the two sides of the frame and the bottom of the material collecting plate. And during discharging, sundries are gathered, so that cleaning and collecting are more thorough, and the blocking net is prevented from being blocked to affect water delivery operation of the water channel.

This application relates to a flood control emergency response method, device, and electronic equipment for a valley-type dry ash storage yard. The method includes: responding to a preset emergency condition where the water level of the downstream drainage well's tail-end dammed lake meets the required emergency conditions, initiating emergency drainage measures to excavate a flood discharge channel and construct a flood control work surface; using a combination of hydraulic flushing and slurry pumping to clean the surrounding sediment deposits of the upstream drainage well; and after the drainage functions of both the downstream and upstream drainage wells are restored, reshaping the ash surface morphology of the entire valley-type dry ash storage yard based on the flood control work surface to construct a flood discharge system with the drainage wells as the lowest control points within the yard. This solves the problems in related technologies where heavy rain causes drainage wells to be buried by sediment, leading to drainage system failure, rapid rise in water level within the storage yard, and a lack of systematic emergency response measures, resulting in a sharp shortening or even disappearance of the dry beach in front of the dam, posing a risk of ash water overflow and dam collapse.

The utility model belongs to the technical field of throwing devices of microbial agents, and particularly relates to a throwing device for improving saline-alkali soil based on the microbial agents. Comprising a frame, wheels are installed at the bottom end of the frame, a push handle is welded to one side of the frame, a box body is welded to the frame, a feeding port and a discharging port are formed in the upper end and the lower end of the box body respectively, a bottom plate is welded to the discharging port, a movable plate is inserted into the position, below the bottom plate, of the box body, and a plurality of strip-shaped holes are formed in the bottom plate and the movable plate. A material distribution plate is obliquely welded on the inner wall of the box body below the movable plate, one side of the movable plate is rotationally connected with an adjusting rod, the adjusting rod is connected with a supporting frame in a penetrating manner, the supporting frame is welded on the outer side of the box body, the adjusting rod in the supporting frame is sleeved with a spring, and the part, located on the outer side of the supporting frame, of the adjusting rod is sleeved with a limiting rod. According to the utility model, the feeding amount of a microbial agent can be adjusted, uniform feeding can be realized, the feeding can be quickly stopped when the feeding needs to be stopped, the working efficiency is high, and the feeding effect is good.

This application discloses a device for treating blockages in cooling wall water pipes. The device includes: a first tee pipe having a fourth, fifth, and sixth pipe, wherein the fourth pipe is connected to the flow channel of the first pipe, the fifth pipe is connected to the flow channel of the third pipe, and the sixth pipe is located between the fourth and fifth pipes; a second tee pipe having a seventh, eighth, and ninth pipe, wherein the seventh pipe is connected to the sixth pipe, the ninth pipe is connected to the second pipe, and the ninth pipe is located between the seventh and eighth pipes; a first shut-off valve located on the eighth pipe for controlling the on / off state of the eighth pipe; and a second shut-off valve located on the ninth pipe for controlling the on / off state of the ninth pipe.

The invention discloses a pipeline dredging device, and relates to the technical field of pipeline dredging equipment.The pipeline dredging device comprises a forced drainage power station, a water suction pump and a centrifugal dehydrator, the forced drainage power station is connected with the water suction pump through a hydraulic oil pipe, and the water outlet end of the water suction pump is connected with a sludge conveying pipe; the dredging device further comprises a dredging unit, the dredging unit comprises a dredging mechanism and a plurality of propelling mechanisms, a front end plate is arranged on one sides of the propelling mechanisms, the dredging mechanism is mounted on the front end plate, a rear end plate is arranged at the ends, away from the dredging mechanism, of the propelling mechanisms, and the dredging mechanism is mounted on the rear end plate. The water suction pump is connected with the rear end plate through a support, the dredging mechanism is connected with a filtered water conveying pipe, the filtered water conveying pipe is communicated with the centrifugal dehydrator, and the forced drainage power station is installed on the engineering vehicle, so that movement of the forced drainage power station and decontamination of municipal pipelines are facilitated.

The invention discloses a glue dispensing device for PCB board processing, relates to the field of PCB board processing, solves the problem that it is difficult to clean the glue dispensing needle of the existing glue dispensing device, comprises: a glue dispensing machine and a glue dispensing syringe installed at the output end of the glue dispensing machine, a turntable frame is arranged below the glue dispensing syringe, a driving turntable is arranged on the inner side of the turntable frame, four centrally symmetrical glue dispensing needles are arranged on the surface of the driving turntable, an electromagnetic suction joint is fixedly installed at the bottom end of the glue dispensing syringe, the top end of each of the glue dispensing needles is magnetically connected to the electromagnetic suction joint through a limit block, and an arc-shaped clamping plate is fixedly installed on the inner side of the turntable frame; it also comprises: a dredging mechanism for dredging the inner wall of the glue dispensing needle, and the dredging mechanism is installed on the outer side of the turntable frame; the invention can dredge the inner wall of the glue dispensing needle stored on the driving turntable through the dredging mechanism, thereby achieving the effect of facilitating the replacement of the glue dispensing needle and rapid dredging.

The invention discloses a pulse recuperating device and a combined qi and blood recuperating instrument, which are used for performing warm and vibration stimulation on perineal acupoints and related parts around the perineal acupoints, and comprise: a handle-shaped holding part; the guide head is made of a heat conduction material, the guide head comprises a connecting part and a working part, the connecting part of the guide head is fixed with one end of the holding part, and the working part of the guide head is provided with a limiting surface attached to the perineum acupoint and related parts around the perineum acupoint or is in a three-dimensional shape; the vibration module is used for driving the guide head to vibrate; and the heating module emits heat in a working state and transmits the heat to the guide head. The invention aims to solve the technical problems that the traditional massage is high in requirement, slow in effect and easy to spread diseases, and the massage of the current instrument is harmful to the human body, and provides the pulse conditioning device and the combined qi and blood conditioning instrument which are low in application requirement and can be used for safely and effectively conditioning pulse.

The utility model discloses a kind of sorting mechanism for low-grade copper sulphide ore, comprising: main component, the main component includes sorting equipment main part and crushing roller mechanism.The utility model is equipped with screening plate, electric telescopic link, dredging rod and motor one, screening plate bulk ore that is not smashed and handled is discharged, electric telescopic link controls dredging rod to move up and can be dredged to screening plate mesh, motor one can control screening plate limit lifting movement;This step, the clogged screening mesh can be dredged quickly, improve screening efficiency, the use effect of device is better;Based on the above beneficial effect, it is equipped with hydraulic lifting column, briquetting, motor two and auxiliary block, hydraulic lifting column can control briquetting to implement pressing to ore, motor two can control the position of exchange briquetting and auxiliary block, and the activity space of ore can be further compressed by auxiliary block cooperation crushing roller mechanism;This step, prevents stone splashing, improves the crushing efficiency, and higher use safety.

This invention relates to the field of sterilization treatment device technology, and discloses a sterilization treatment device for dishwasher water, including a dishwasher and a sterilization lamp installed inside the dishwasher, and further including: a filter section installed on the dishwasher; a backflushing section installed on the filter section; a sterilization section installed on the dishwasher; the filter section includes an installation assembly installed on the dishwasher; a limiting assembly installed on the installation assembly; the installation assembly includes a conveying pipe connected to the dishwasher, and a support ring is provided on the inner wall of the conveying pipe. This invention, by setting up a filter section, solves the problems of existing sterilization treatment devices where the filter screen uses a fixed or entirely enclosed installation structure, mostly requiring auxiliary tools, making operation difficult, and making timely and convenient maintenance difficult after the filter screen becomes clogged. Long-term accumulation of debris can easily cause water circuit blockage, slow water flow, and easily lead to water backflow.

The present application relates to feed ring mold repair cleaning technical field, especially to a kind of multifunctional cleaning equipment for feed ring mold repair, including cleaning cylinder and cylinder cover;Cleaning cylinder is equipped with cylinder cover.This application realizes by electric control ball valve to close branch pipe, so that high-pressure clean water cannot pass through electric control ball valve, and then high-pressure clean water will sliding sleeve be pushed to the hole in the corresponding hole of feed ring mold, and the clogging material in hole is pushed out by sliding sleeve, and the hole is dredged, to avoid causing a large amount of water waste;Through dredging pipe, before sliding sleeve, insert into the clogging material inside the hole of feed ring mold, and by through hole, make the flow guide groove and the corresponding dredging pipe communicate, so that the clean water in branch pipe enters the dredging pipe through the flow guide groove and the through hole, and then is sprayed from the fine hole on the outer surface of the dredging pipe, to directly inject into the clogging material inside, quickly wet the inside of clogging material, so that clogging material quickly absorbs water, expands and softens, to facilitate sliding sleeve to push out the material.

The utility model discloses a dry-mixed mortar stirring device which comprises a stirring tank, a feeding pipe is fixedly connected to the top of the stirring tank, a dredging component is arranged on the stirring tank, and a cleaning component is arranged in the stirring tank. The dredging component comprises a vertical plate, a lifting groove formed in one side of the vertical plate, a lifting block arranged in the lifting groove, a screw rod connected with the lifting block, a first motor fixedly connected with the top of the screw rod, a moving plate fixedly connected with one side of the lifting block and a dredging rod connected with the moving plate, and the lifting block is slidably connected with the lifting groove; through the arrangement of the stirring tank, the feeding pipe and the dredging component, the problems that when an existing stirring device is used, although raw materials can be stirred, the feeding port is prone to being blocked when the raw materials are added into the stirring tank, manual dredging is needed after the feeding port is blocked, dredging is relatively time-consuming and labor-consuming, and the stirring efficiency is high are solved. And therefore, the practicability is reduced.

The application relates to a dredging device for a plastic extruder screw cylinder cooling water pipe and relates to the technical field of cooling water pipe technology, which comprises a screw cylinder, a dredging water recycling mechanism comprises a plurality of flow guide pipes, the bottom of the plurality of flow guide pipes is externally fixedly connected with a three-way switching shell, the inside of the three-way switching shell is rotationally connected with a switching control handrail, the inside of the three-way switching shell is rotationally connected with a three-way switching ball, the inside of the three-way switching shell is fixedly connected with a switching branch pipe, and the other end of the switching branch pipe is fixedly connected with a water resource recycling main pipe. The application has the effects that the switching control handrail fixed in the inside of the three-way switching shell is rotated, the three-way switching ball is driven to rotate by the switching control handrail, the flow direction of water flow in the cooling water pipe is changed in the rotating process of the three-way switching ball, and the filtered water flow is filtered by a filtering assembly connected with the water resource recycling main pipe.

The utility model provides sterilization equipment for lotus seed processing, which comprises a box body, a connecting frame which can be repeatedly inclined and is provided with an opening on one side is arranged in the box body, a leak hole is arranged at the bottom of the connecting frame, a motor used for driving the connecting frame is arranged on the box body, a collecting box is fixed at the bottom of the connecting frame, and the opening of the collecting box is staggered with the opening of the connecting frame. Two electric telescopic rods are fixed to the bottom of the collecting box, a baffle and a blocking piece which are used for blocking the opening position of the connecting frame and the opening position of the collecting box are fixed to the telescopic ends of the two electric telescopic rods correspondingly, a movable plate capable of moving front and back is arranged on one face of the box body, and an ultraviolet disinfection lamp penetrating through the box body is fixed to the face, close to the box body, of the movable plate; and the ultraviolet disinfection lamp is positioned above the connecting frame. The lotus seed leak hole dredging device can quickly dredge blocked leak holes, the dredging process is simple and quick, workers do not need to manually dredge the leak holes, the labor burden of the workers is relieved, and the sterilization efficiency of lotus seeds is improved.

The invention discloses an automatic feeding synthesis kettle with a flow detection control device, which comprises a funnel and a reaction kettle, the top of the reaction kettle is provided with a driving motor, the left upper end of the reaction kettle is provided with a feeding port, the lower end of the funnel is provided with a tubular screw conveyor, and the discharge port of the tubular screw conveyor is provided with a flow detection device. A quantitative box is fixedly arranged at an outlet of the flow detection device, a discharging pipe is arranged at the lower end of the quantitative box, a first electromagnetic valve is arranged at the lower end of the discharging pipe, a transparent pipe is fixedly arranged at an outlet of the first electromagnetic valve, and the lower end of the transparent pipe is inserted into the feeding opening; a first feeding dredging device is arranged right above the funnel, a box cover is arranged at the upper end of the quantitative box, and the reaction kettle comprises a kettle body and a heating base plate; the kettle body comprises a stainless steel inner layer, an aerogel heat insulation layer, a silicate felt heat preservation layer and a stainless steel outer layer. According to the technical scheme, the structural design is reasonable, feeding is smooth, the working efficiency can be improved, and the heat preservation performance and practicability are good.

The utility model relates to the field of packaging bags, and discloses an easily-opened three-edge-sealed packaging bag which comprises a packaging bag body, a lifting layer is arranged at the top of the packaging bag body, a first sealing strip is arranged on one side of the bottom of the lifting layer, and a second sealing strip is arranged on the other side of the bottom of the lifting layer. Connecting blocks are arranged on the outer wall of the lifting layer, a through groove is formed between the connecting blocks, the first sealing strip is made of a magnet material, and the first sealing strip and the second sealing strip are symmetrically distributed. According to the three-edge-sealed packaging bag easy to open, through the arrangement of the packaging bag body, the lifting layer, the first sealing strip, the second sealing strip, the connecting block and the through groove, the function of being convenient to tear is achieved, sealing and unsealing can be rapidly conducted again after the packaging bag is torn, and therefore operation convenience is improved, re-sealing storage of objects is facilitated, and the packaging bag is convenient to use. The working requirements of people are met, and the device is worthy of popularization and application.

The utility model discloses mixing equipment provided with an anti-blocking structure and used for organic fertilizer production and processing, which belongs to the technical field of organic fertilizer production and processing and comprises an equipment whole body, a discharge hole is formed in the bottom of the equipment whole body in a penetrating manner, and a vibration arc plate is mounted on the inner wall of the bottom of the equipment whole body. Through mutual cooperation of a first rotating motor, a cam, a tension spring and a limiting groove, vibration of a vibration plate in the whole equipment is achieved, and then through vibration of the vibration plate, organic fertilizer tightly stacked together is vibrated and dispersed, so that the organic fertilizer rapidly rolls and descends in the whole equipment; and through mutual cooperation of structures such as a second sliding foot, a second sliding groove and a dredging rod, dredging of the organic fertilizer blocked in the discharging port is achieved, so that rapid dredging of the blocked discharging port is achieved, the problem that the discharging port is blocked is effectively avoided, the overall discharging speed of the equipment is increased, and the working efficiency is improved. The overall production efficiency of the organic fertilizer is further improved.

The utility model discloses a terrace water collecting and draining device, and relates to the technical field of terraces. Comprising a terrace body, a plurality of water guide pipes installed on the terrace body and used for guiding water in an upper-level terrace to a lower-level terrace, and a water drainage mechanism installed on the terrace body and used for draining excessive water in the terrace into an external water storage facility in extreme weather such as rainstorm, and the water drainage mechanism comprises a water drainage assembly and a control assembly. Through the arrangement of the water guide pipe, water in the upper-layer terraced field can be guided into the lower-layer terraced field to irrigate crops in the terraced field layer by layer, and under the extreme weather conditions such as rainstorm, if the water inlet amount of the terraced field is larger than the water discharge amount of the water guide pipe, the water level of the terraced field can rise, and at the moment, the control assembly can automatically start the emergency water discharge mode; redundant water resources are rapidly discharged out of the terrace area through the drainage assembly, and water and soil loss, terrace collapse and other disasters are avoided.

The utility model discloses a crocodile farm sewage treatment device, including the jar body, the jar body top fixedly connected with the overflow pipe, the jar body bottom fixedly connected with the control valve, install the filter screen in the jar body, be equipped with the dredging part on the jar body, jar body one side is equipped with the miscellaneous component, the dredging part includes with the extension frame of jar body one side fixed connection, with the first motor of extension frame one side fixed connection, with the first screw rod of first motor output fixed connection and with the drive frame of first screw rod outside link, the utility model discloses a jar body, overflow pipe, control valve, filter screen and dredging part are set up, when using, although the sewage treatment device of existing can carry out purification filtration to the sewage in the farm, but when the filter screen is blocked, it needs to remove the filter screen and clean, after cleaning, again install, lead to the relatively longer downtime, thereby lead to the problem of reduced practicability.

The utility model belongs to sewage treatment equipment technical field, concretely relates to a PVC pipeline for sewage treatment, including pipeline body, pipeline bend, sealing connection subassembly, is equipped with anti -blocking flow guide subassembly in pipeline body, is equipped with maintenance sewage cleaning subassembly in the bottom of pipeline bend. Anti -blocking flow guide subassembly contains spiral pollution guide rib, flow guide cone and bionic convex point, can guide sewage flow, reduce impurity deposition;Sealing connection subassembly guarantees the leakproofness of pipeline connection;Maintenance sewage cleaning subassembly is convenient for jam dredging;It is also equipped with sensor module, data processing module etc. can monitor pipeline operating state. The utility model is anti -blocking, and the sealing performance is good, is convenient for maintaining and can intelligent monitoring, is applicable to the field of sewage treatment.

The utility model discloses a drainage structure with a floor drain overhaul function, which belongs to the technical field of building waterproof equipment and comprises a drainage tube, a plurality of communicating parts are arranged on the drainage tube, the upper ends of the communicating parts are opened to form overhaul tube openings, and an overhaul box is arranged above each overhaul tube opening; a floor drain opening is formed in the middle of the top of the overhaul box body and connected with a water drainage pipeline, and the water drainage pipeline penetrates through the overhaul box body and extends into the overhaul pipe opening. A cement mortar layer is arranged on the upper portion of the gravel sublayer, a pit is formed in the position, close to an overhaul pipe opening of the communicating piece, of the cement mortar layer, and the overhaul box body is detachably arranged in the pit. If the interior of the drainage tube is blocked, the overhauling tube opening can be exposed only by lifting out the overhauling box body, and each branch at the overhauling tube opening can be quickly dredged by adopting mechanical dredging equipment; and if the branch communicating piece of the overhaul pipe orifice needs to be replaced, the overhaul box body is disassembled to expose the corresponding communicating piece, the ground does not need to be excavated, and the overhaul efficiency is high.

The application discloses a lattice public key data encryption and decryption method and a key encapsulation method based on vector decoding. The method comprises the following steps: obtaining first target ciphertext data according to predetermined plaintext data, a first predetermined encryption method, a first target public key and a predetermined interference term, so that lattice public key data encryption can be realized; obtaining target plaintext data according to the first target ciphertext data, a first target private key and a predetermined decryption method, so that lattice public key data decryption can be realized. Meanwhile, the application also proposes a variant problem of a ring learning with errors problem (RLWE), namely, a subset-sum parity RLWE (sspRLWE) problem, and further optimizes the lattice public key data encryption method based on vector decoding in the application based on the variant problem. The public key encryption method and the key encapsulation method designed in the application have the characteristics and advantages of provable security, resistance to quantum computer attacks, short public key and ciphertext length, high calculation efficiency, low decryption failure rate, flexible parameter selection and the like.

The present invention discloses a dredging tool for a filter cartridge, comprising a base, a horizontally arranged guide cylinder is provided on the top of the base, a guide groove is provided in the axial direction of the guide cylinder, a protective shell is provided at the rear end of the guide cylinder, and the front end of the guide cylinder is a free end; a dredging tube is sleeved in the guide groove, a dredging shaft is provided at the front end of the dredging tube, one end of the dredging shaft is connected to the front end of the dredging tube, and a puncture head is provided at the other end of the dredging shaft, and the puncture head is conical; an operating wheel is provided at the rear end of the dredging tube, a fixed disk is provided at the middle position of the operating wheel facing inward, and a connecting shaft is plugged between the fixed disk and the center of the axis of the operating wheel. The present invention can quickly dredge the axial direction of the filter cartridge; the dredging tool for the filter cartridge greatly improves the efficiency of dredging the filter cartridge.

The utility model relates to the technical field of oil well dredging equipment, in particular to a producing well unblocking device which comprises a shell, handles are fixedly connected to the left side and the right side of the outer surface of the shell, a connecting block is fixedly connected to the front side of the outer surface of the shell, and a first connecting hole is formed in the upper end of the connecting block in a penetrating mode. An angle adjusting assembly is fixedly installed in the first connecting hole, a threaded column is fixedly connected to the lower end of the shell, and a dredging head assembly is installed on the outer surface of the threaded column in a threaded mode. According to the unblocking device for the oil producing well, the dredging head assembly is arranged, so that the purposes of quickly dredging a blocked position and improving the unblocking efficiency are achieved; and by arranging the angle adjusting assembly, the purposes of improving the pertinence of blockage removal and reducing the labor burden of workers are achieved.

The utility model belongs to the technical field of unmanned aerial vehicles, and particularly relates to a plant protection unmanned aerial vehicle fertilizing device which comprises a machine body, a fertilizing box is arranged at the bottom of the machine body, a screen plate is arranged at the bottom of the fertilizing box, and an anti-blocking mechanism is arranged at the bottom of the screen plate; the power device is arranged at the bottom of the machine body, and the power device is in linkage with the anti-blocking mechanism; wherein the anti-blocking mechanism comprises two flow guide assemblies which are hinged to each other, the two flow guide assemblies are hinged through a rotating shaft, and the power device is used for driving the flow guide assemblies to dredge the screen plate. And the flow guide assembly can be rapidly rotated by controlling the power device, so that the ejector rod is extruded out to dredge the screen plate.