100results about How to "Improve the blocking effect" patented technology

The invention discloses a TBC battery structure, a preparation method thereof and a TBC battery, in the structure, a P region and an N region are respectively provided with a P-type / N-type doped polycrystalline silicon passivation layer, and an oxygen-doped polycrystalline silicon layer is arranged between the P region and the N region. The preparation method comprises the step of preparing the P-type / N-type doped polycrystalline silicon passivation layer and the oxygen-doped polycrystalline silicon layer on the P region and the N region. In the structure, the oxygen-doped polycrystalline silicon layer is arranged between the P region and the N region, so that the P region and the N region can be effectively separated, an excellent shadow shielding resisting function of a corresponding assembly can be realized, and the generating capacity of the assembly in a shadow shielding environment can be further improved. According to the preparation method, the design of depositing multiple tunneling oxide layers and polycrystalline silicon layers at a time, the design of a laminated mask, a new isolation mode, an efficient cleaning process and the like are adopted, the problems that an existing TBC battery preparation process is tedious, boron-doped polycrystalline silicon laser ablation residues exist, the investment and generation cost is high and the like are effectively solved, and the preparation method is a brand-new TBC battery route.

The application discloses a polyurethane and rock wool composite board side foaming leakage prevention device, and belongs to the technical field of building material processing. The device comprises a conveying frame and a foaming filling pipe. The board is conveyed on the conveying frame, and the foaming filling pipe is inserted into the gap between the rock wool layer and the lower side film paper. The front side of the lower side film paper is provided with a first guide piece, and the rear side is provided with a second guide piece. The lower side film paper is arranged between the first guide piece and the second guide piece. The upper side film paper is located at the front side of the first guide piece. A pressing wheel is arranged in front of the upper side film paper and is used for laminating the upper side film paper and the upper side layer. A carding piece is arranged and is used for pressing the upper side film paper and the lower side film paper together. The first guide piece is provided with glue which is coated on the surface of the lower side film paper and the upper side film paper. When the board moves on the conveying frame, the lower side film paper and the upper side film paper are bonded and pressed together. The application is used for solving the problems that the barrier layer is easy to deviate and the foaming is easy to leak during the processing of the composite board.

The invention provides an organic compound, a preparation method thereof and an organic electroluminescent device, and belongs to the technical field of luminescent materials, and the organic compound has a structure as shown in a general formula I. The organic compound is used as a luminescent auxiliary material, can effectively improve the luminescent efficiency and stability of the organic electroluminescent device, and has good application prospects. The service life is prolonged, the driving voltage is reduced, and the device is endowed with more excellent comprehensive performance.

The application belongs to the technical field of new energy automobile charging, and particularly relates to a direct-current split type charging host, aiming at the problems of inconvenient transportation of the existing split type host, and poor protection effect on the charging terminal, and the following scheme is proposed, which comprises a mounting box, a base is fixedly installed at the bottom of the mounting box, two movable doors are hingedly connected to one side of the mounting box, and a storage bin is fixedly installed at the top of the mounting box; a first charging terminal and a second charging terminal are arranged on the two sides of the mounting box, in the application, the split type charging host can be combined and installed with at most two charging terminals, the split type charging host can be conveniently transported, and the use of the charging state is not affected, and meanwhile, when the charging terminals are installed on the two sides of the charging host, the charging terminals can be continuously shielded, the tarpaulin for shielding can be synchronously extended with the extension of the terminals, and the long-term use of the charging terminals is facilitated.

The utility model discloses a differential oil seal plugging frock orientation positioning structure, including guide post, the left side of guide post is provided with recess, the recess is cylindrical. The utility model discloses adopt the recess of cylindrical with inner spline who sets up in the left side of guide post, can with the accurate cooperation of differential half axle's outer spline, realize the stable connection of guide post and differential, ensure the integral positioning accuracy. The movable frame in the sliding groove cooperates with the threaded rod, can move steadily through the rotation handle driving sleeve and oil seal assembly pressure ring, make oil seal even stress in the installation process, effectively avoid the damage or deformation of oil seal in traditional installation mode because of uneven stress, the lamination design of guide post and oil seal assembly pressure ring further guarantees the coaxial degree of oil seal installation, improves the plugging effect and installation quality, reduces the subsequent problem of installation deviation, and the device has the advantages of accurate positioning, good plugging effect and convenient to use.

The utility model relates to the technical field of sealing gasket, especially to a double-layer composite sealing gasket, which comprises a metal ring, an annular cavity is arranged on the inner side of the metal ring, a rubber ring is fixed in the annular cavity of the metal ring, an annular deep groove and an annular shallow groove are arranged on the inner circumferential surface of the rubber ring, the annular deep groove and the annular shallow groove are connected through at least one sawtooth groove, the depth of the groove bottom of the sawtooth groove gradually decreases from the annular deep groove to the annular shallow groove, compared with the prior art, the composite structure of the metal ring and the rubber ring, combined with the unique annular deep groove, annular shallow groove and sawtooth groove on the inner circumferential surface of the rubber ring, can effectively improve the sealing performance of the sealing gasket, the annular deep groove and the annular shallow groove can form multiple sealing lines during the sealing process, and the blocking ability of the fluid is enhanced, the uniform distribution of pressure is facilitated by the through design of the sawtooth groove, stress concentration is reduced, and the pressure resistance and wear resistance of the sealing gasket are improved.

The utility model discloses a kind of refining machine oil agent circulation systems for fiber production involve fiber production technical field, including refiner, oil agent circulation tank and membrane filtration device, the bottom of the refiner is provided with liquid collecting tank, and the circulating liquid of liquid collecting tank is connected with oil agent circulation tank, and oil agent circulation tank is connected with membrane filtration device and oiling device respectively, and the circulating liquid of oil agent outlet of membrane filtration device is connected with oil agent circulation tank, the refining machine oil agent circulation system for fiber production is also provided with external processor, liquid level transmitter is arranged in the oil agent circulation tank, and oil agent circulation pump is arranged in the liquid outlet of oil agent circulation tank, and solenoid valve I is arranged in the inlet of membrane filtration device;By optimizing oil agent process, improve fiber oiling rate uniformity, make fiber physical property more stable, product strength and elongation rate variation coefficient reduce, significantly improve product quality.Product quality improvement helps company to develop high-end market, improve product added value, enhance market competitiveness.

The present application belongs to the field of oil and gas field development, and particularly relates to a nitrogen foam flooding method for fractured shale oil reservoirs; it solves the problems of long production cycle and difficult matrix production of current foam flooding technology; the technical scheme is: through physical simulation experiment, reservoir core, crude oil and formation water are obtained; first, wettability reversal experiment is carried out to determine the optimal effective time of wettability reversal agent, and imbibition experiment is carried out to determine the optimal well shut-in time; after establishing the initial oil saturation of the core, formation water flooding and foam flooding experiments are carried out in turn; cumulative oil production is recorded and oil displacement efficiency is calculated; finally, staged foam flooding experiment is carried out, and oil displacement efficiency is also calculated; after the experiment, the curves of oil displacement efficiency and time change of staged foam flooding, foam flooding and formation water flooding are compared and analyzed; the results show that the final oil displacement efficiency of staged foam flooding is the highest; the new method can significantly shorten the production lag period and improve the final oil displacement efficiency.

The invention relates to a double-end tool magazine machine, and relates to the technical field of machine tools, the double-end tool magazine machine comprises a machine body, two main shafts, a tool magazine and two plugging devices, two tool changing openings are formed in the tool magazine in a spaced mode, and each plugging device comprises a plugging door which is arranged on the tool magazine in a sliding mode and used for plugging or opening the tool changing openings; the moving block is arranged on the tool magazine in a sliding mode in the direction opposite to the sliding direction of the blocking door. The air injection mechanism is arranged on the moving block; the driving mechanism is used for driving the blocking door and the moving block to move. The driving mechanism starts and drives the blocking door to move to open the tool changing opening, the air injection mechanism is close to the tool changing opening, the air injection mechanism injects air to prevent impurities, cooling liquid and the like on the outer side of the tool magazine from entering the inner side of the tool magazine, the risk that the impurities and the cooling liquid enter the tool magazine is reduced, and the stability and the service life of a machine tool during operation are improved.

The utility model relates to the technical field of laser cutting machines, in particular to a laser cutting machine with an auxiliary feeding platform, which comprises a machine body, a feeding platform with an inclined top is arranged on one side of the machine body, a plurality of driving grooves are formed in the top of the feeding platform at equal intervals, and feeding rollers are arranged in the driving grooves. Baffles are arranged on the front side and the rear side of the top of the feeding table, a plurality of supporting plates are arranged at the tops of the baffles at equal intervals and fixedly connected with the tops of the baffles, a supporting frame is fixedly connected between the supporting plates, positioning assemblies are symmetrically arranged on the supporting frame, and anti-skid assemblies are symmetrically arranged below the supporting frame. The feeding device has the auxiliary feeding capacity, so that feeding difficulty caused by the weight or the large specification of a material is avoided when the material is cut, the labor intensity of workers can be reduced, and the cutting efficiency can be improved.

The invention provides a temporary plugging agent and a preparation method thereof. Raw materials of the temporary plugging agent comprise resin and modified particles, and raw materials of the modified particles comprise rigid particles wrapped by composite membranes and a modifier; the modifier is a mixture containing a silane coupling agent and a film-forming agent; the composite membrane is prepared from polyethyleneimine, polyallylamine hydrochloride and nano silicon dioxide. The preparation method of the temporary plugging agent comprises the following steps: sequentially immersing rigid particles into a polyallylamine hydrochloride solution, a nano silicon dioxide dispersion liquid, a polyethyleneimine solution and a nano silicon dioxide dispersion liquid, and repeating for 20-100 times to obtain rigid particles wrapped by a composite film; mixing the rigid particles wrapped by the composite film, a silane coupling agent and a film-forming agent, and heating to obtain modified particles; and mixing the modified particles with resin, and curing to obtain the temporary plugging agent. The temporary plugging agent provided by the invention has good toughness and relatively high strength, and can be used for plugging the interior of a crack through good deformability.

The utility model relates to numerical control machine tool protection technical field has solved to the work piece processing, its splashing work piece slag is easy to enter personnel eye department, causes the injury to personnel eye department, and after work piece processing is completed, the work piece is taken out and is inconvenient to the problem of the internal cleaning of numerical control machine tool. Specifically a kind of numerical control machine tool protection mechanism, including numerical control machine tool, the both sides in numerical control machine tool are fixedly installed with guide rail, the both sides of opposite in numerical control machine tool are all set with sliding slot, the inside of guide rail and sliding slot is all slidably connected with protection mechanism, the inner bottom of numerical control machine tool is fixedly installed with several telescopic rods, spring is sleeved on the surface of telescopic rod, the top of telescopic rod is fixedly installed with support plate, the surface of support plate is fixedly installed with locating plate, the surface of locating plate is fixedly installed with buffer pad, protection mechanism includes electric push rod fixedly installed in the both sides of numerical control machine tool, and the output of electric push rod is fixedly installed with moving frame.

The utility model discloses a kind of gob coalbed methane rapid plugging devices, it is related to gas layer plugging technical field, including directional drilling rig and mixing box, mixing box is used to store filling material, support frame carries out stirring to filling material in mixing box, improve the injection efficiency of filling material, improve the plugging speed to gas layer, and support frame quantitative injection retarder or accelerator in mixing box changes the coagulation speed of filling material, improve the plugging effect to gas layer, while the filling material in mixing box is stirred, the inside wall of mixing box is scraped, avoid that filling material sticks in the inside wall of mixing box, the utility model improves the speed and efficiency of plugging to gas layer.

The utility model discloses a centrifugal machine for medicine raw material production, which belongs to the technical field of centrifugal machines and comprises a centrifugal machine main body, a cabinet door is arranged on one side of the centrifugal machine main body, a cover plate is rotatably connected above the centrifugal machine main body, and a rotating component is arranged above the inside of the centrifugal machine main body. A rotating assembly is arranged on the centrifugal machine body, a containing cylinder is fixedly connected to the upper portion of the rotating assembly in a surrounding mode, a clamping assembly is arranged at one end of the interior of the containing cylinder, a blocking assembly is arranged in the middle of the cover plate, and damping assemblies are symmetrically arranged on the lower portion of the centrifugal machine body. The sealing effect is good through the rubber sealing gasket, vibration generated when the centrifugal machine works can be conveniently absorbed and relieved through the damping assembly, and the anti-skid effect can be conveniently achieved through the rubber anti-skid pad.

The utility model discloses a piping plugging device which comprises an inverted filter part, the inverted filter part surrounds a piping position, a stabilizing part is arranged on the periphery of the inverted filter part, the stabilizing part is used for stabilizing the position of the inverted filter part, a plugging part is connected into the inverted filter part through a lead screw, and the lead screw is used for adjusting the depth of the plugging part embedded into a piping opening. The plugging piece is used for plugging the piping opening, the plugging piece can permeate water and block sand, the device can plug piping emergency rescue through the plugging piece and the inverted filtering piece, silt can be left in the device, silt loss is reduced, then emptying of a sand layer is avoided, and more dangerous accidents are avoided.

The utility model discloses an anti-dropping trachea cannula, which is characterized in that the stable state of the trachea cannula is realized through the matching of all parts during an operation, the normal operation of an artificial airway is effectively maintained and guaranteed, the problems of outward movement, dropping, inward sliding and the like of the trachea cannula are avoided, the efficiency and the safety of the operation are improved, and the life safety of a patient is further guaranteed. According to the technical scheme, the device is characterized by comprising a pipe body, a limiting piece and a deformation piece, a connector is arranged at one end of the pipe body, an air outlet and a fixing air bag are arranged at the other end of the pipe body, the fixing air bag is connected with a filling connector through a branch pipe, a penetrating hole is formed in the middle of the limiting piece, and the limiting piece can be arranged at the position, close to the connector, of the pipe body in a sleeving mode. The limiting piece is detachably connected with the tube body, the trachea cannula is tightly wrapped on the inner side of the penetrating hole through the fastening assembly, and the deformation piece is arranged on the tube body and located at the position, corresponding to the inner side of teeth, of the tube body.

The invention belongs to the field of oil and gas field development, and discloses a drillable and grindable high-water-content horizontal well plugging tool and a using method.The plugging tool comprises a first connector and a connecting sleeve which are connected with one end of a bridge plug body, and a second connector and a lifting sleeve which are connected with the other end of the bridge plug body; according to the plugging tool, the pressure of the inner cavity of the mandrel acts on the main piston and the auxiliary piston; the main piston drives a nut, a central pipe, a second joint, a rubber sleeve shaft and a second cone to move upwards and extrudes the lower part of the slip to move upwards; the auxiliary piston drives the taper sleeve and the first cone to move downwards to extrude the upper part of the slip to move downwards, so that the slip is expanded to anchor the sleeve and the rubber sleeve is compressed to block an upper oil layer and a lower oil layer; the plugging tool combination can be installed at a reasonable position as required according to the plugging requirement of a water outlet point of a middle-high water content horizontal well, a swabbing production layer section can be converted by lifting and lowering a pipe column at a wellhead, the requirement of two-section and three-section separated mining is met, an oil pipe does not need to be directly connected with a separated mining tool, and the reliability is improved.

The utility model provides a storage steel tray processing corner polishing device, which relates to the technical field of polishing devices, and comprises a machine body, a machine case, a protection plate and a grinding wheel, the machine case is installed at one end of the machine body, the protection plate is fixedly installed on one side of the machine case through bolts, the grinding wheel is arranged inside the protection plate, and the grinding wheel is fixedly installed on one side of the machine case. The protective device comprises a machine box, a protective plate is arranged on the machine box and rotationally installed on one side of the machine box, a fixing device is arranged on the outer surface of the protective plate, and the fixing device clamps and fixes a grinding wheel through two clamping plates. And the two clamping plates can fix the grinding wheel until the grinding wheel is completely clamped by the two clamping plates, so that the situation that in the process of carrying the angle grinder, the grinding wheel rotates, other objects are wound around the grinding wheel, and consequently the objects are damaged is prevented, and the angle grinder is more convenient to carry.

The utility model discloses an internal expansion type sealing plug which comprises an installation disc, a first extrusion disc and a second extrusion disc, the left side and the right side of the installation disc are respectively provided with a convex structure protruding outwards, the peripheral face of each convex structure is fixedly connected with a rubber ring in a sleeved mode, and the interior of each rubber ring is hollow. The first extrusion disc and the second extrusion disc are arranged on the left side and the right side of the mounting disc correspondingly, grooves matched with the convex structures are formed in the sides, facing the mounting disc, of the first extrusion disc and the second extrusion disc correspondingly, and the convex structures on the two sides of the mounting disc slidably extend into the grooves of the first extrusion disc and the second extrusion disc correspondingly. A plurality of annularly-distributed sliding holes are formed in the two sides, facing the groove, of the installation disc. The rubber ring, the extrusion disc and other mechanisms are ingeniously combined, the pipeline plugging effect is achieved, the structural design is simple and clear, use is convenient and fast, production and maintenance cost is remarkably reduced, and good market popularization and application value is achieved.

The invention belongs to the technical field of oilfield chemistry, and relates to a gas reservoir crack mixed temporary plugging agent and a preparation method thereof. The temporary plugging agent is prepared from the following components in parts by mass: a water-soluble high-molecular polymer, heat-resistant starch, degradable fibers, a strength improver and water, the strength improver is montmorillonite powder wrapped by polyvinyl alcohol. The water-soluble high-molecular polymer is matched with the degradable fibers and the starch particles to be interwoven and connected to form a net-shaped structure, so that the pressure resistance is improved, and the temporary plugging effect is improved; according to the strength improving agent, montmorillonite powder wrapped by polyvinyl alcohol is added, in the process that the temporary plugging agent still flows downwards, the polyvinyl alcohol on the surface of the montmorillonite powder is melted along with decline and temperature rise, so that the montmorillonite powder leaks out and absorbs water again to swell, and the strength of the temporary plugging agent is improved. And montmorillonite powder wrapped by heat-resistant starch-degradable fiber-polyvinyl alcohol is cross-linked to form a rich three-dimensional system structure as a climbing skeleton, so that the temporary plugging agent can temporarily plug cracks at positions needing temporary plugging.

The application relates to the photovoltaic technology field, in particular to a back contact cell, a preparation method thereof, a back contact laminated cell and a photovoltaic module. The back contact cell comprises a substrate and a first passivation structure, and a first surface of the substrate is sequentially provided with a first hydrogenated amorphous silicon oxide layer, a second hydrogenated amorphous silicon oxide layer and a P-type doped layer. The oxygen doping ratio of the first hydrogenated amorphous silicon oxide layer is X1, the oxygen doping ratio of the second hydrogenated amorphous silicon oxide layer is X2, and X1 and X2 satisfy X1>X2. By arranging the laminated structure with the oxygen doping ratio gradient design, the asymmetric carrier transport channel can be formed, the blocking effect on the electrons and the transmission effect on the holes can be improved, the selective transmission of the carriers can be realized, the parasitic absorption at the interface can be reduced, the probability of the repeated absorption of the light by the substrate can be increased, the open-circuit voltage and the short-circuit current of the back contact cell can be improved, and the photoelectric conversion efficiency of the back contact cell can be improved.

The utility model relates to the field of power equipment fire safety technology discloses a kind of fireproof plugging device for transformer box cable inlet and outlet, comprising: fixed sleeve, be located at the cable inlet and outlet of transformer box, its two ends are respectively connected with extension sleeve, one of the extension sleeve is located inside transformer box, another extension sleeve is located outside transformer box;The utility model is through being provided with fixed sleeve, extension sleeve, annular airbag, liquid ring, connecting pipe, piston and detection part, realize the automatic plugging of transformer box cable inlet and outlet under high-temperature environment such as fire. Annular airbag is expanded by liquid pressure and is attached to cable outer wall, forms efficient fire-retardant seal.

The invention relates to a diene gel chemical blocking and channeling sealing agent. The problems that the plugging effect is poor and well cementation accidents are easily caused after an existing superfine cement system is solidified in large pore channel or crack plugging are mainly solved. The adhesive is characterized by comprising the following components in parts by mass: 8-10 parts of acrylamide; 1 to 3 parts of N, N-dimethylacrylamide; 5-6 parts of superfine silicate; 0.1 to 0.5 part of a dissolution promoter; 0.5 to 2.0 parts of a cross-linking agent; 0.1 to 0.3 part of an initiator; 0.1 to 0.2 part of a reinforcing agent and 78 to 85.2 parts of water; the preparation method comprises the following steps: sequentially adding the acrylamide, the N, N-dimethylacrylamide and the dissolution promoter into quantitative clear water according to the formula proportion of the agent, stirring, adding the cross-linking agent and the initiator, continuously stirring, adding the superfine silicate and the enhancer, and stirring and dissolving to obtain uniform liquid. The blocking and channeling sealing agent can improve the field working efficiency, the blocking effect is good after solidification, and well cementation accidents are not prone to being caused.

This invention discloses an organic compound, its preparation method, and an organic electroluminescent device, relating to the field of luminescent materials technology. The chemical formulas I-1 and I-2 provided by this invention are fluorene compounds with a unique fluorene structure. As a light-emitting auxiliary layer in a red organic electroluminescent device, this type of compound can reduce the potential barrier between the hole transport layer and the light-emitting layer, lower the driving voltage of the organic electroluminescent device, further improve the hole transport rate and electron blocking ability, and increase the charge balance between holes and electrons within the light-emitting layer. This allows light to be formed effectively within the light-emitting layer, rather than on the surface of the hole transport layer, thereby greatly improving the device's lifetime and luminous efficiency.

The invention relates to the field of oilfield development and recovery, and discloses a profile control agent as well as a preparation method and application thereof. The profile control agent has a modified nano silicon dioxide core and a hair chain grafted on the surface of the core; the hair chain contains a structural unit A as shown in a formula (I), a structural unit B as shown in a formula (II) and an end-capping group; the core has a surface modification group as shown in a formula (III); the molar ratio of the structural unit A to the structural unit B is 1: (0.5-1.8); the number average molecular weight of the hair chain is 5000 to 20000 g / mol; the end-capping group is halogen; the weight ratio of the inner core to the hair chain is 1: (25-65). The profile control agent does not depend on the matching property with the pore throat size in an oil reservoir, can adapt to the pore throat space and form effective plugging areas in pore throats with different sizes, is excellent in plugging effect, and greatly improves the adaptability of the profile control agent to the oil reservoir.

This invention provides an antibody targeting the human interleukin-6 receptor, its applications, and products, belonging to the field of protein engineering technology. The antibody provided by this invention comprises: any one or more of HCDR1, HCDR2, and HCDR3 with sequences as shown in SEQ ID NO.1, SEQ ID NO.2, and SEQ ID NO.3, respectively, and / or any one or more of LCDR1, LCDR2, and LCDR3 with sequences as shown in SEQ ID NO.4, SEQ ID NO.5, and SEQ ID NO.6, respectively. The antibody targeting the human interleukin-6 receptor provided by this invention has high affinity, good blocking effect, and excellent safety.

This invention provides a blocking separation structure, a blocking separation device, and a turret-type testing equipment. The turret-type testing equipment includes a feeding structure and a blocking separation device. The blocking separation device is installed at the front end of the feeding structure and includes a feeding structure and a blocking separation structure. The blocking separation structure includes a fixed bracket, a movable bracket, first and second adjusting fixing components, and a pressing component connected in sequence. The fixed bracket is connected to the feeding structure. The movable bracket can rotate up and down around a rotating shaft, thereby driving the pressing component to rise or fall. When the pressing component rises, it releases the product; when it falls, it presses down on the product. The first adjusting fixing component can be adjusted in a first direction, the second adjusting fixing component can be adjusted in a second direction, and the pressing component can be adjusted in its rising and falling direction. This invention simplifies the product blocking separation structure, reduces debugging difficulty, and provides better blocking effect and longer service life.

This invention relates to an oil-based drilling fluid plugging agent and its preparation method, comprising granular materials made of the following components by weight percentage: asphalt powder: 15-28 wt%; organic clay: 6-16 wt%; rock fiber: 25-40 wt%; nano-SiO2: 5-12 wt%; sepiolite: 8-15 wt%; elastic graphite: 8-18 wt%; and polyurethane (TPU) powder particles: 10-20 wt%. This invention features good compatibility, high efficiency, and excellent plugging effect. It can repair formation defects in the wellbore, prevent wellbore leakage, enhance the retention and plugging effect of oil-based drilling fluid in formation microfractures, improve wellbore stability, and effectively plug and strengthen the wellbore.

The structure of preventing oil short circuit of terminal block includes a terminal block and a plurality of terminal; the terminal block has a bottom surface and a wiring surface; the terminal extends one end on the wiring surface to form a wiring part which can combine the wire; the other end of the terminal extends on the bottom surface to form a pin part; the bottom surface of the terminal block is concave between the pin parts to form a flow channel; the pin part is concave to form a surrounding part around the pin part; the surrounding part is convex compared with the concave part and the flow channel; the surrounding part can be inserted between the terminal block and the inserted surface (such as circuit board) to form a surrounding mechanism to prevent the dust, impurities and oil in the flowing air from entering the concave part; the flowing air is guided to the flow channel to prevent the accumulation of the oil and impurities.

The application relates to an automatic blockage cleaning device, method and electronic equipment for a coal conveying and screening system, wherein the automatic blockage cleaning device comprises a control system and an execution device for dredging screen holes; the control system comprises a monitoring unit, a processing unit and an output unit; the monitoring unit is used for acquiring screen underflow material information of the coal conveying and screening system in real time, the screen underflow material information being material yield meeting screening conditions; the processing unit is used for calculating average yield within a preset time according to the screen underflow material information; and the output unit is used for outputting a first control signal according to the average yield, the first control signal being used for controlling running or closing of the execution device. The application has the effect of realizing mechanicalization and automatic blockage cleaning of the coal conveying and screening system, and avoids various problems generated in the process of manually cleaning blockage.