46results about How to "Achieve the purpose of blocking" patented technology

The invention relates to a horizontal well segmented temporary blockage fracturing method and belongs to the technical field of hydraulic fracturing of oil and gas field development. The method comprises the steps of: carrying out temporary blockage on a perforation of a horizontal well; forming a new crack around the temporary blocked perforation; and repeating the process above. The horizontal well segmented temporary blockage fracturing method achieves a segmented fracturing effect on a well section of a horizontal well and provides a more effective, rapider and more convenient mode for development of the horizontal well. Meanwhile, after a temporary blockage agent is degraded, a crack end port also can be supported so as to improve a fracturing success rate; the temporary blockage agent cannot be left in a shaft, meanwhile, has a very high degradation rate in fracturing fluid, and cannot generate pollution to the stratum, so that the transformation effect is greatly promoted.

The invention relates to a high-pressure gas seam-expanding, grouting and water-plugging method for a precutting trough of microfissure surrounding rock. Annular cutting groove pretreatment is performed on the bottom of a grouting hole, the surrounding rock on the bottom of the grouting hole cracks in a directional manner along an annular cutting groove by a high-pressure gas seam-expanding mode, a through fracture plane is generated between the surrounding rock and an adjacent drilling hole, cement paste is injected in the through fracture plane so as to block the through fracture plane, a complete and effective water-plugging curtain is formed, the purpose of blocking a water seepage channel of the microfissure surrounding rock is achieved, new fissures in the surrounding rock can be avoided, water-plugging failure caused by secondary damage on the surrounding rock is avoided, a microfissure surrounding rock grouting and water-plugging effect is improved greatly, an application range is wide, field operation is simple, a blocking effect on permeated water of the microfissure surrounding rock is excellent, and the field direct application value is high.

The invention discloses a water environment delayed consolidation leakage stopping paste used for drilling wells, and belongs to the field of petroleum drilling engineering leakage stopping agents. The leakage stopping paste comprises a component A and a component B; the component A comprises multi-component resin, a flow type regulator and auxiliary materials, and the multi-component resin comprises modified furfural resin, modified epoxy resin and modified vinyl resin; and the component B comprises an initiator, a cross-linking agent, the flow type regulator and an inert material. The leakage stopping paste is an organic paste with the characteristics of unable free flowing, compression plastic deformation, consolidation in water environment and adjustable consolidation time at different temperatures, solves the problems of difficulty in judgment of the shape and the dimensions of a leakage layer and a channel at different temperatures and difficulty in successful leakage stopping of a water layer and especially a flowing water leakage layer, and improves the leakage stopping success rate (leakage loss reduction and time saving).

The invention relates to the technical field of planing machines, in particular to a double-sided planing machine capable of achieving vertical planing. The machine comprises a base, two symmetrically-arranged first U-shaped plates are fixedly connected to the top of the base, and two partition plates are fixedly connected to inner cavities of the two first U-shaped plates. A plurality of conveying rollers located at the outer sides of the partition plates are installed on the inner cavity walls of the first U-shaped plates, and planing roller cutters located at the inner sides of the two partition plates are further installed on the inner cavity walls of the first U-shaped plates. Through elastic arrangement and cooperation of every two adjacent partition plates and baffles, the chip blocking effect can be effectively improved, the situation that wood chips are extruded along with plate conveying to generate indentations, and consequently the plate planing quality is affected can be effectively prevented, the planing roller cutters drive cams to rotate through cooperation of rotating rods and bevel gears, brush plates are driven to move up and down in a reciprocating manner for cleaning chippings, a suction fan is controlled to be started through touch control setting, the planed chippings are collected, the purpose that the suction fan is started at any time when used is achieved, and resources can be effectively saved.

The invention discloses a slow release and solid-liquid separation device for biological fertilizers such as fish protein amino acid liquid fertilizers, which comprises a box body and bases, wherein aplurality of bases are fixedly connected below the box body, and a separation device is arranged in the box body. According to the slow release and solid-liquid separation device for biological fertilizers such as fish protein amino acid liquid fertilizers, an output shaft of the first motor drives a belt to rotate, the belt drives a first rotating shaft to rotate, the first rotating shaft drivesa barrel to rotate, a liquid fertilizer in the barrel is stirred through a stirring rod, and the problems of high labor intensity and low production efficiency by manual stirring in the prior art aresolved; the handle drives the stirring rod to move, a second rotating shaft is driven by an output shaft of a second motor to rotate, and a second transverse plate is driven by the second rotating shaft to rotate, so that the second transverse plate rotates to the position above the barrel, and the problems that in the prior art, no blocking equipment exists, liquid splashing is caused, potentialsafety hazards exist, and cleaning is troublesome are solved.

The invention discloses a coal mine gas extraction hole plugging device. According to the coal mine gas extraction hole plugging device, after an extraction hole is plugged, along with continuous increasing of the gas amount in the hole, the hole is plugged secondarily through mixing of water and cement. The coal mine gas extraction hole plugging device is characterized in that two connecting plates are placed at the two ends of an elastic sleeve correspondingly and are made of rigid materials; a through hole is formed in the middle of the connecting plate at one end of the elastic sleeve, andone end of a main body cylinder is placed on the connecting plate at one end of the elastic sleeve; a fastening thread is arranged on the outer side of the main body cylinder; the main body cylinderis made of a rigid material, and two gas guiding grooves are symmetrically formed in the main body cylinder and communicate with the interior of the main body cylinder; two cover plates are placed onthe inner walls of the main body cylinder correspondingly and correspond to the two gas guiding grooves; a plurality of gas inlet holes are formed in the cover plates, and the diameters of the gas inlet holes are increased gradually from an inlet to an outlet; and a partition plate is placed on the elastic sleeve and partitions the interior of the elastic sleeve into a water storage cavity and a cement cavity.

The invention discloses a construction method of an ecological safety barrier in a waste mine restoration area. The construction method comprises the following steps: S1, before mining of a mining area, removing soil on the surface layer and the subsurface layer of a mine in a digging manner, storing the soil in a proper environment, after mining of the mine is completed, placing the stored soil back to the original place, storing the soil for 3-5 days, taking a certain amount of the soil in a unit range for testing, and detecting the pH value, humidity and nutritional condition of the soil. According to the construction method, the construction process of the ecological safety barrier in the waste mine restoration area is simple, the effect is obvious, treatment can be carried out from multiple aspects of the pH value, humidity and nutritional condition of the soil, the soil quality is improved, improvement is accelerated, and the period of restoration construction is shortened; and meanwhile, a good condition is provided for vegetation growth by broadcasting fertilizers, the air permeability and water permeability of the soil are improved by animals, a stone-built slope protection structure is stable, and the purposes of leakage prevention and blocking can be efficiently achieved.

The invention discloses building rubbish treatment multi-directional lap-joint combination equipment. The building rubbish treatment multi-directional lap-joint combination equipment comprises a horizontal plate, a crusher and a first material unloading plate, wherein the left side of the upper surface of the horizontal plate is provided with the crusher, the material outlet position of the crusher is fixedly connected with the first material unloading plate, and the left side of the lower portion of the first material unloading plate is provided with a material blocking device. According to the building rubbish treatment multi-directional lap-joint combination equipment, by means of mutual coordination among an H-shaped plate, a first motor, a threaded rod, a gear, a T-shaped tooth plateand other structures, the first motor can be made to drive the gear to rotate through the threaded rod, and the gear drives the T-shaped tooth plate to move, so that rubbish is blocked; and by means of the mutual coordination among first connection rods, a third motor, a cam, a water spray pipe, a water pump, a water box and other structures, the third motor can be made to drive a second connection rod to move through the cam, the second connection rod drives the water spray pipe to perform reciprocating motions, meanwhile, the water spray pipe performs dust settling through water spray, and the environment is protected.

The invention provides a molecular sieve adsorption apparatus for high-humidity organic waste gas, which belongs to the technical field of molecular sieves. The molecular sieve adsorption apparatus comprises a waste gas purifying barrel, wherein the top surface of the waste gas purifying barrel is provided with a sealing cover, the left lower end of the waste gas purifying barrel is provided withan air inlet, the right upper end of the waste gas purifying barrel is provided with an air outlet, and a dehydration chamber, a dehumidifying chamber and a purifying chamber are successively arrangedin the waste gas purifying barrel from bottom to top. The molecular sieve adsorption apparatus for the high-humidity organic waste gas has the advantages of good purifying effect and high working efficiency in the aspect of treating the high-humidity organic waste gas.

The invention discloses a blocking mechanism of an oil level indicator pipe. The blocking mechanism comprises a front sleeve body and a back sleeve body, the front portion of the back sleeve body is inserted into a hole of the front sleeve body, a spring is arranged between the front end of the back sleeve body and the inner end face of the front sleeve body, an annular groove is arranged in the inner side of the back portion of the front sleeve body, the annular groove is located in the outer side of the front portion of the back sleeve body, the diameter of the annular groove is gradually changed smaller from the front end to the back end, a hole is formed in the front portion of the back sleeve body, a steel ball is located in the hole, a screw rod is connected with the inner hole of the back sleeve body in a threaded mode, a blocking ring is connected with the front end of the screw rod, and a hand wheel is connected with the rear end of the screw rod. The blocking mechanism is simple in overall structure, tight in blocking and convenient to operate.

The invention discloses a plugging device for leakage point detection of a sewage transmission pipe. The plugging device seals the end of the sewage transmission pipe through cooperation of a plurality of clamping arms and a fixing ring, no foreign matter cleaning is required, and the plugging efficiency of the end of the sewage pipe can be effectively improved. The plugging device is characterized in that a thread sleeve is disposed at the center of a cover plate, the cover plate is divided into two parts by the middle, and the diameter of the part close to an opening is larger than that of the other part; the fixing ring is disposed in the cover plate, an inner clamping groove is formed in an outer ring of the fixing ring, a guide ring is placed on the inner wall of the part with the larger diameter of the cover plate, and the guide ring is put in the inner clamping groove; an annular groove is formed in the end face of the end, away from the cover plate, of the fixing ring; a limiting ring is put on the inner wall of the fixing ring and corresponds to the annular groove, a sealing rubber strip is arranged in the annular groove, and the diameter of the annular groove gradually decreases from outside to inside; and one end of a hollow pipe is placed in the thread sleeve and in threaded connection with the thread sleeve, and the other end of the hollow pipe penetrates out of the fixing ring.

The invention relates to a medical care dredging drainage system for department of cardiology. The medical care dredging drainage system comprises a dredging drainage tank, wherein the dredging drainage tank is connected with a negative pressure cavity; the dredging drainage tank is connected with a piston cylinder; the piston cylinder is connected with a ventilation partition board; the piston cylinder is connected with a driving piston; the driving piston is connected with a driving piston rod; the driving piston rod is connected with a driving cam; the driving cam is connected with a transmission shaft; the transmission shaft is connected with a motor; the dredging drainage tank is connected with a drainage tube interface; the drainage tube interface is connected with a drainage tube; the drainage tube is connected with a drainage bag; the dredging drainage tank is connected with a draining valve; the draining valve is connected with a draining tube; and the draining tube is connected with the drainage bag. According to the medical care dredging drainage system disclosed by the invention, air pressure is formed through utilizing the up-and-down effect of the driving piston, so that the functions of dredging plug and guiding flowing are achieved.

The invention discloses a coal mine blast hole plugging device. According to the coal mine blast hole plugging device, through matching of an elastic sleeve and a screw, a blast hole is plugged in a multistage mode, and the outer side of the elastic sleeve can be tightly attached to the hole wall of the blast hole. The outer side of the elastic sleeve can be tightly attached to the hole wall of the blast hole during plugging, plugging is tighter, and the plugging effect is improved effectively. The coal mine blast hole plugging device is characterized in that a top plate is arranged at one endof the elastic sleeve, is made of rigid materials and is provided with two liquid outlet grooves; plugging pieces are arranged in the liquid outlet grooves, are of an arc-shaped piece structure and are made of plastics; the outer side of the top plate is provided with two liquid outlet holes communicating with the two liquid outlet grooves correspondingly; the middle of the top plate is providedwith a round limiting groove; a bottom plate is arranged at the other end of the elastic sleeve and is made of rigid materials; the middle of the bottom plate is provided with a through hole; and a plurality of separation plates are arranged in the elastic sleeve to divide the inside of the elastic sleeve into a mixed liquid cavity, a water storage cavity, a gravel cavity and a clay cavity.

The invention discloses construction waste treatment equipment. The construction waste treatment equipment comprises a transverse plate, a crusher and a first discharging plate, wherein the crusher isinstalled on the left side of the upper surface of the transverse plate, the first discharging plate is fixedly connected to a discharging port of the crusher, a material blocking device is installedon the left side of the lower portion of the first discharging plate, the construction waste treatment is combined with assembly equipment in multidirectional aspects, through mutual cooperation of structures such as an H-shaped plate, a first motor, a threaded rod, a gear and a T-shaped toothed plate, the first motor can drive the gear to rotate through the threaded rod, and the gear drives theT-shaped toothed plate to move, so that waste is blocked, through mutual cooperation of structures such as a first connecting rod, a third motor, a cam, a water spraying pipe, a water pump and a watertank, the third motor can drive a second connecting rod to move through the cam, the second connecting rod drives the water spraying pipe to reciprocate, meanwhile, the water spraying pipe conducts dust falling through water spraying, and the environment is protected.

The invention belongs to the field of heat insulation pipe manufacturing machines, and particularly relates to a hydraulic air sealing machine for an outer sleeve. The hydraulic air sealing machine comprises a moving frame, a hydraulic cylinder, a pressing plate and a locking plate. The hydraulic cylinder is fixed to the upper portion of the moving frame, a piston rod of the hydraulic cylinder is connected with the locking plate, U-shaped grooves are formed in the two sides of the locking plate, the lower portion of the locking plate is fixedly connected with the pressing plate, a working table matched with the pressing plate is arranged on the lower portion of the pressing plate and fixed to the outer side of the moving frame, and moving wheels are arranged at the bottom of the moving frame. The hydraulic air sealing machine is simple in structure; the hydraulic cylinder arranged on the moving frame can drive the pressing plate to move downwards to be matched with the working table; the hydraulic air sealing machine can effectively prevent air leakage in the blocking process.

The invention provides an automobile painting room ventilating device. The automobile painting room ventilating device comprises a round bar, a hairbrush, a support rod, a rolling bearing, a through opening and a rubber ring, wherein the through opening is formed in the middle of the upper end surface of a barrel cover, the round bar is mounted inside the through opening through the rolling bearing, the lower end of the round bar extends to the lower portion inside a transparent water storage barrel, the hairbrush is connected with the round bar through the support rod and is in contact with the inner wall of the transparent water storage barrel, and the rubber ring is arranged in a sleeve mode at the upper end of the round bar and mounted inside the through opening. The automobile painting room ventilating device achieves the aim of convenient brushing by driving the hairbrush to slide on the inner wall of the transparent water storage barrel and meanwhile is good in filtering effects, capable of facilitating brushing and good in stability.

The invention relates to the technical field of stone construction process, in particular to an indoor stone laying processing method, and aims to solve the problem that existing stone laying is hardin facing antiskid and anti-alkali processing. According to the technical scheme, the method includes the steps of S1, cleaning stone, and subjecting the stone to natural air drying or drying; S2, performing sand blasting on the dried stone; S3, preparing a waterproof curing agent, and evenly coating the surface of the stone with the curing agent to achieve a permeation sealing effect, wherein thecuring agent is conveyed in the micropore capillary of the stone to reach the internal pores of the stone so as to achieve the purpose of overall blocking; S4, performing base layer processing beforelaying, and arranging an under-layer aluminum veneer and a honeycombed aluminum plate on the to-be-laid base layer, wherein the honeycombed aluminum plate is horizontally laid right above the under-layer aluminum veneer; S5, preparing a stone laying adhesive, and using the adhesive to lay the corresponding stone onto the corresponding honeycombed aluminum plate. By the method, stone facing saltpetering can be avoided, and cooperation with outdoor rough-surface stone can be achieved.

The invention discloses a fire protection plugging device which is used for plugging holes in fire protection structures of a building. The fire protection plugging device comprises a base (1), a base plate (2), a first driving device, a second driving device, an L-shaped vertical plate (10), a third driving device and a first plugging block (13). The base plate (2) and the first driving device are both arranged on the base (1). The base plate (2) can be driven by the first driving device to move horizontally relative to the base (1). The second driving device and the L-shaped vertical plate (10) are both arranged on the base plate (2). The L-shaped vertical plate (10) can be driven by the second driving device to move longitudinally relative to the base plate (2). The first plugging block (13) and the third driving device are both arranged on the L-shaped vertical plate (10). The first plugging block (13) can be driven by the third driving device to move vertically relative to the L-shaped vertical plate (10). Through the scheme, the problems of low safety coefficient and inconvenient operation of existing plugging equipment can be solved.

The invention discloses an oil cylinder. The oil cylinder comprises a cylinder body, wherein a left end cover is fixedly installed at the left end of the cylinder body, a right end cover is fixedly installed at the right end of the cylinder body, a piston body is slidably connected into the cylinder body, a piston rod extending out of the right end cover is installed at the right end of the pistonbody, a rodless cavity is formed between the piston body and the left end cover in the cylinder body, and a rod cavity is formed between the piston body and the right end cover; an opening B communicating with the rod cavity is formed in the side surface of the right end cover, a valve hole is formed in the side surface, facing the piston body, of the left end cover, and an opening A communicating with the valve hole is formed in the side surface of the left end cover; mounting holes are formed in the piston body and the piston rod in the axial direction of the piston rod, sleeve rods are installed in the mounting holes, an adjusting assembly is installed in the left end cover, and the adjusting assembly is used for controlling the length of the portions, extending out of the mounting holes, of the left ends of the sleeve rods. The oil cylinder is simple in structure, and can achieve the adjustment of the stroke of the oil cylinder.

The invention provides a preparation method of a slow-release feed additive for pigs and poultry. The preparation method comprises the following steps of preparing microencapsulated plant essential oil capsule core liquid, preparing microencapsulated plant essential oil coating liquid, preparing microencapsulated plant essential oil, preparing mixed acid and preparing the feed additive. Through single-layer coating of the plant essential oil, plant essential oil components are isolated from air, and therefore, oxidation is avoided; the loss rate of the plant essential oil components can be reduced, after the feed additive is placed in a drying oven at 60 DEG C for 24 hours, the loss rate of cinnamyl aldehyde is 3.11-3.91%, the loss rate of carvacrol is 3.09-3.92%, and the loss rate of thymol is 3.82-4.58%; and after 26-day-old sows are bred for 30 days by using the feed additive disclosed by the invention, a weight gain rate can reach 16.88-20.31%, a survival rate can reach 100%, and the number of diarrhea sows can be reduced to 0-2.

The invention discloses a coal mine blast hole plugging device. According to the coal mine blast hole plugging device, through matching of an elastic sleeve and a screw, a blast hole is plugged in a multistage mode, and the outer side of the elastic sleeve can be tightly attached to the hole wall of the blast hole. The outer side of the elastic sleeve can be tightly attached to the hole wall of the blast hole during plugging, plugging is tighter, and the plugging effect is improved effectively. The coal mine blast hole plugging device is characterized in that a top plate is arranged at one endof the elastic sleeve, is made of rigid materials and is provided with two liquid outlet grooves; plugging pieces are arranged in the liquid outlet grooves, are of an arc-shaped piece structure and are made of plastics; the outer side of the top plate is provided with two liquid outlet holes communicating with the two liquid outlet grooves correspondingly; the middle of the top plate is providedwith a round limiting groove; a bottom plate is arranged at the other end of the elastic sleeve and is made of rigid materials; the middle of the bottom plate is provided with a through hole; and a plurality of separation plates are arranged in the elastic sleeve to divide the inside of the elastic sleeve into a mixed liquid cavity, a water storage cavity, a gravel cavity and a clay cavity.

The present invention relates to driller design scheme for petroleum and gas well, and is especially one new design scheme of composite driving driller with reliable performance, compact and flexible structure and low cost. The driller platform includes winch, diesel engine, linking machine, valve assembly, clutch, hydraulic coupler, turntable, driving mechanism, drilling bit, control table, pressure converter, signal transducer, electric pressure gauge, etc. It features the turntable driven with frequency variable motor, the driving mechanism with frequency variable motor connected through the turntable box with the turntable, the drilling bit inside the turntable, the winch driven with a diesel engine, the connection of the winch with the automatic drilling bit feeding mechanism via a gear switching mechanism, etc. The present invention has reliable performance, simple first, flexible control and high interchangeability.

The invention relates to a low-frequency warning sonar countermeasure device, which includes an acoustic subsystem, an autonomous energy subsystem, and an anchoring depth determination subsystem; wherein, the acoustic subsystem includes a duty circuit, a remote control receiver, a control computer, and a high-power linear power amplifier. and an ultra-low frequency high-power transmitting transducer; the autonomous energy subsystem includes a marine power energy collection device, an intelligent power management system and a rechargeable battery pack; the mooring depth-fixing subsystem includes an anchoring mechanism, a depth-fixing mechanism, a control compartment and docking interface. The low-frequency warning sonar countermeasure device has the characteristics of low operating frequency, long working hours, can be deployed in key battle sea areas, and can be used in peacetime and wartime, etc., and finally achieves the purpose of supporting our submarines to break through the blockade of the enemy island chain underwater acoustic defense system , Improve the concealment and combat effectiveness of our submarine operations.

The invention discloses a water-sand separation buffer mechanism for high-purity quartz sand processing, which comprises a water-sand separation device, the water-sand separation device comprises a mounting rack and a water-sand separation chamber fixed on the mounting rack, and a guide-in pipeline is obliquely mounted below the water-sand separation chamber. A separation opening is formed in the middle of the guide-in pipeline, a speed brake is machined and formed at the upper end of the guide-in pipeline, a filter screen is movably installed at the opening of the separation opening, two unloading buffer plates are evenly installed at the right end of the filter screen and located at the joint of the guide-in pipeline and the water-sand separation chamber, and a protective outer cover is installed on the surface of the filter screen. The top of the protective outer cover is provided with a reset piece, and the left end is provided with a buffer hanging mechanism. The mechanism specially used for buffering the quartz sand water-sand separation equipment is designed, the buffering mechanism mainly comprises a force unloading buffering plate and a buffering hanging mechanism, and the service life of a filter screen can be effectively prolonged through the omnibearing buffering mode.

The invention discloses construction waste processing equipment, comprising a horizontal plate, a crusher and a first blanking plate, a crusher is installed on the left side of the upper surface of the horizontal plate, and a discharge port of the crusher is fixedly connected with The first blanking plate, the lower left side of the first blanking plate is equipped with a material blocking device, the construction waste treatment multi-directional lap joint combination equipment, through the H-shaped plate, the first motor, threaded rod, gear and T-shaped The mutual cooperation between structures such as the tooth plate can make the first motor drive the gear to rotate through the threaded rod, and the gear drives the T-shaped tooth plate to move, thereby blocking the garbage. Through the first connecting rod, the third motor, The mutual cooperation between the cam, water spray pipe, water pump and water tank and other structures can make the third motor drive the second connecting rod to move through the cam, and the second connecting rod drives the water spray pipe to reciprocate. The water is used to reduce dust and protect the environment.

The invention discloses a valve actuator with good energy-saving effect. The valve actuator comprises a pipe body, a fixing pipe is arranged at the middle position of the top of the pipe body, moreover, a sleeve is fixed at the top end of one side of the fixing pipe, an electric push rod is fixed on one side of the fixing sleeve through a mounting rod, moreover, clamping grooves are formed in theupper end and the lower end of the sleeve, and a push plate is arranged at the output end of the electric push rod. According to the valve actuator, the arranged electric push rod pushes the push plate to move, the push plate drives a connecting rod to move, under cooperation between a movable arm and a limiting plate, a sliding rod moves downwards, then the purpose of blocking the pipe body is achieved, first reset springs drive clamping heads to enter the clamping grooves while blocking is performed, so that fixation of the push plate is completed, then electric energy waste caused by the fact that the electric push rod is continuously used is avoided, an arranged rotating handle drives a screw column to continuously move downwards under the condition that a second internal thread and asecond external thread cooperate with each other, and the screw column drives the sliding rod to move downwards under the action of a rotating disc to achieve the purpose of manual on-off.

The invention discloses an environment-friendly sanding machine with an intelligent dust removal function for furniture production, and relates to the technical field of sanding machines. The environment-friendly sanding machine comprises a working table, wherein supporting columns are fixedly connected to the bottom of the working table, moving wheels are movably connected to the bottoms of the supporting columns, a conveying belt is movably connected to the interior of the working table, a working box is fixedly connected to the top of the working table, fixing plates are fixedly connected to the two sides of the working box, and first air cylinders are fixedly connected to the tops of the fixing plates. According to the environment-friendly sanding machine with an intelligent dust removal function for furniture production, by arranging dust collectors and dust collecting boxes, the purpose of collecting dust generated after furniture sanding is achieved, and then the problem that the body of a worker is likely to be harmed is solved; and by arranging a second air cylinder and a second push rod, the problem that on-site adjustment cannot be easily carried out according to the furniture thickness is solved.

The invention relates to a convenient luggage barrow which comprises a main body, a connecting mechanism, an adjusting mechanism, an auxiliary mechanism and two moving mechanisms, the adjusting mechanism comprises an electromagnet, a limiting assembly and two adjusting assemblies, and each adjusting assembly comprises a baffle, a moving plate, a first spring and a magnet strip. The auxiliary mechanism comprises a blocking assembly, a connecting plate, two friction plates and two air cylinders, according to the convenient luggage barrow, the loading capacity of equipment can be adjusted according to the actual luggage amount through the adjusting mechanism, so that the practicability of the equipment is improved, and through the auxiliary mechanism, the moving resistance of the equipment can be increased when the equipment goes downhill. And a worker does not need to consume large force in order to pull the equipment, so that more labor is saved, the convenience of the equipment is improved, the probability of a landslide phenomenon is reduced, and the reliability of the equipment is improved.

The invention discloses a blocking mechanism of an oil level indicator pipe. The blocking mechanism comprises a front sleeve body and a back sleeve body, the front portion of the back sleeve body is inserted into a hole of the front sleeve body, a spring is arranged between the front end of the back sleeve body and the inner end face of the front sleeve body, an annular groove is arranged in the inner side of the back portion of the front sleeve body, the annular groove is located in the outer side of the front portion of the back sleeve body, the diameter of the annular groove is gradually changed smaller from the front end to the back end, a hole is formed in the front portion of the back sleeve body, a steel ball is located in the hole, a screw rod is connected with the inner hole of the back sleeve body in a threaded mode, a blocking ring is connected with the front end of the screw rod, and a hand wheel is connected with the rear end of the screw rod. The blocking mechanism is simple in overall structure, tight in blocking and convenient to operate.

The invention relates to the technical field of mobile communication base stations, and discloses a mobile communication base station control cabinet which comprises a control cabinet body, heat dissipation openings are formed in the left side and the right side of the control cabinet body, two inclined plates are fixedly installed in one heat dissipation opening and are symmetrically arranged, a filter screen is fixedly installed between the two inclined plates, a vibrating ball for vibrating is arranged at one side of the filter screen, a connecting spring is connected between the two inclined plates, a U-shaped plate for driving the connecting spring to twist is arranged on the connecting spring, and a blowing-away mechanism for disturbing airflow is arranged between the upper inner wall and the lower inner wall of the heat dissipation opening. When air enters through the heat dissipation opening of the control cabinet body, branches and leaves can be blocked at the outer end of the filter screen, and thus, prevented from entering the control cabinet body, the blocking purpose is achieved, fire disasters caused by overheating of the branches and leaves entering the control cabinet body are prevented, and meanwhile the filter screen is effectively prevented from being blocked by the branches and leaves.