743 results about "Floor type" patented technology

Several methods of controlling a vacuum cleaner (10) using various types of sensors (94, 96, 97, 98) are provided. One method is based on a differential pressure between a suction airflow path and ambient air and includes: detecting the differential pressure, comparing the detected differential pressure to a predetermined threshold, and, when the detected differential pressure is less than the predetermined threshold, initiating a predetermined control procedure. A status indicator (164) is updated based on the detected differential pressure. Another method is based on a level of electrical current flowing through a brush motor (100). Still another method is based on a type or condition of the floor being traversed. Yet another method is based on a distance to a surface of a floor over which the vacuum cleaner is advancing. In another aspect of the invention, a vacuum cleaner is provided. In various combinations, the vacuum cleaner includes a vacuum source (36, 38), a brush motor (100), a drive motor (104), a controller processor (74), a sensor processor (90), an overcurrent sensor (98), a suction airflow sensor (94), a floor type sensor (97), and a floor distance sensor (96).

A cleaning appliance includes a housing with a brushroll and a wheel mounted thereto. A floor-type sensor is disposed within a mounting tube secured to the housing. The floor-type sensor emits sonic energy toward a surface being traversed by the cleaning appliance and receives corresponding sonic energy reflected by the surface. A comparator, electrically coupled to the floor-type sensor, compares the received reflected sonic energy to one or more associated predetermined values to determine the type of surface being traversed. A processor analyzes the results of the comparison and controls at least one of a suction fan, said wheel and said brushroll, based at least in part on the analysis.

The invention discloses a split floor-type air conditioner. The split floor-type air conditioner comprises a shell, a panel assembly, an upper air supply device and a lower air supply device, wherein an air inlet is formed in the shell; the panel assembly is arranged at the air outlet side of the shell, and a first upper air outlet and a first lower air outlet are formed in the panel assembly; the upper air supply device is arranged in the shell, a second upper air outlet and a second lower air outlet are formed in the shell, the second upper air outlet and the first upper air outlet are arranged in a corresponding manner, and the upper air supply device has an upper air outlet first working state and a lower air outlet second working state; the lower air supply device is arranged below the upper air supply device, a third upper air outlet and a third lower air outlet are formed in the lower air supply device, the third lower air outlet corresponds to the first lower air outlet, and the lower air supply device has an upper air outlet first working state and a lower air outlet second working state; the second lower air outlet and the first lower air outlet are optionally communicated with each other, and the third upper air outlet and the first upper air outlet are optionally communicated with each other. According to the split floor-type air conditioner, air volume and temperature inside a room can be uniformly distributed, and the application comfort of the air conditioner can be improved.

The invention provides a floor type air-conditioner indoor unit. The floor type air-conditioner indoor unit comprises a floor type main body and a wind supply assembly, wherein the floor type main body comprises an air inlet, a fan air flue and a heat exchanger, the wind supply assembly is provided with a wind outlet side and a wind inlet side, the wind supply assembly comprises an environment air flow channel, a first wind outlet, a second wind outlet and a wind adjusting mechanism, the environment air flow channel penetrates through the middle of the wind supply assembly in a front-rear mode, the first wind outlet is formed in the lower portion of the wind outlet side, the second wind outlet is formed in the upper portion of the wind outlet side, the wind adjusting mechanism is arranged inside the environment air flow channel and is provided with a third wind outlet, an opening of the third wind outlet faces the wind outlet side, and air flow inside the fan air flue comprises first part air flow discharged from the first wind outlet, second part air flow discharged from the second wind outlet, and third part air flow discharged from the third wind outlet. For different working conditions such as refrigeration and heating, the air-conditioner indoor unit has good organization and adjustment capacities for the outlet air flow, improves the comfort level of the indoor environment, and improves the degree of satisfaction of a user.

The invention discloses a trolley flexible transport system and an application method thereof. A plurality of trolleys are arranged on an orbit which is arranged in advance; a rotary table is arranged on the bent part of the orbit; a friction drive device drives the trolleys to run and the rotary table to rotate; and bilateral combined lifting devices are arranged on the trolleys, so that a full floor type assembly line that a workpiece only needs to be loaded and positioned at one time, and the height can be controlled through lifting is constructed. The trolleys for assembly complete omnibearing assembly operation of the workpieces of an automobile, the workpieces are loaded and positioned at one time, and the conversion between load change and position reference in the prior art is avoided; and assembly quality and the working efficiency are improved. A floor running mode is adopted in the trolleys serving as main equipment and the rotary table and completely replaces a suspension transportation mode in the prior art, so that a large number of steel structure lifting devices are reduced, the hoist load of plants is greatly reduced, engineering investment is reduced, and the construction period is shortened. The layout design of the production line is more flexible and practical.

The invention discloses an air guide part of an air conditioner. The air guide part can rotate along a rotary axis; the air guide part comprises a first flow guide piece and a second flow guide piece, which are arranged on the rotary direction of the air guide part; and an air flue provided with an air inlet and an air outlet is formed between the first flow guide piece and the second flow guide piece. The air guide part disclosed by the invention can rotate, so that the air outlet of the air flue is driven to rotate; large-angle air supplying can be realized and the comfort of the air conditioner is improved; and when the air guide part rotates to the left and right sides, air loss is not caused. Meanwhile, the invention further discloses a splitting floor type air conditioner provided with the air guide part.

The invention discloses a multifunctional advertisement player. The multifunctional advertisement player comprises a floor type machine shell, an auxiliary display screen and a main display screen, wherein the auxiliary display screen and the main display screen are arranged on the front face of the machine shell. The auxiliary display screen is located over the machine shell, the main display screen is located in the middle of the machine shell, and a high-definition camera, a body sensor and a card swiping area are further arranged between the auxiliary display screen and the main display screen. A computer which is connected with the advertisement display screens, the high-definition camera, the body sensor and a card swiping recognizer is arranged in the machine shell. An environment temperature monitoring device is further arranged in the machine shell. By means of the multifunctional advertisement player, the two display screens are adopted, floor distribution of an office building is detailed through electronic navigation, and people can know real-time news, dynamic advertisements and required on-demand information when waiting for an elevator by finding related information of a certain floor and a certain company through a touch screen; people can also enter a virtual e-commerce platform through the 3D body sensor to perform commercial activities such as trying on in front of a mirror or item selection or item purchasing; people can participate in the big lucky wheel game to win a big prize after obtaining lucky draw codes.

A quick replacement of multi-cable friction elevator achieves reducing of replacement time and labor intensity, and fsafety. Its apparatus consists of a stepped replacing mechansm, a cable-off preventing unit, and an automatic monitor. The stepped replacing mechansm comprises a stepping cylinder, a clamp, and a basement. The cable-off preventing unit comprises a sleeve, a cable going-through unit, a press cap, a wedge, a spring and a spring base, a hydraulic cylinder, an installing rack, pins, U-shaped clips, needle oil cups, and H-shape steel. The automatic monitor comprises a pressure monitoring alarm which includes an A / D converter, a pressure sensor, PLC, relays, and pressure modules, and a cable-off monitoring alarm which includes a tachogenerator, solenoid valves, an A / D converter, PLC and relays.

The invention provides a packing structure of a floor type air-conditioner indoor unit. The packing structure comprises packing foam and packing paper supports, the foam specifically comprises the first packing foam and the second packing foam connected with the first packing foam, and a first containing groove is formed in the first packing foam. A second containing groove corresponding to the first containing groove is formed in the second packing foam, and the first containing groove and the second containing groove form a containing chamber used for containing the floor type air-conditioner indoor unit. The packing paper supports are laid on the opposite outer side faces of the packing foam in the height direction of the floor type air-conditioner indoor unit. According to the packing structure of the floor type air-conditioner indoor unit, ant-treading performance is improved when the floor type air-conditioner indoor unit is transversely placed by adopting the packing structure, and after the packing structure is adopted in the floor type air-conditioner indoor unit, the floor air-conditioner indoor unit can be placed vertically and transversely, the limit on the transportation and placing mode and the loading and unloading mode of the floor type air-conditioner indoor unit by the packing structure is lowered, and the transportation efficiency of the floor type air-conditioner indoor unit is improved.

The invention provides a split floor type air conditioner which comprises a shell, a first fan and a second fan, wherein a first air outlet and a second air outlet are formed in the shell, the first air outlet is formed in the top of the shell, and the second air outlet is formed in the bottom of the shell; the first fan is provided with a first air supply port and a second air supply port, the first air supply port is communicated with the first air outlet, and the second air supply port is communicated with the second air outlet; an air supply port of the second fan is communicated with the first air outlet or the second air outlet. With the adoption of the split floor type air conditioner, the problem of poorer comfort of the split floor type air conditioner in the prior art is effectively solved.

The invention discloses a floor type indoor ceiling concrete slab bottom drilling mechanism which belongs to the technical field of building indoor decoration construction instruments and comprising a supporting pipe, a pressure lever handle, an outer sleeve, a grip type power supply switch, an inner sleeve, a puncher bracket and a puncher, wherein the bottom of the supporting pipe is provided with a stabilizing plate; the pressure lever handle is connected to the supporting pipe; the upper part of the outer sleeve is provided with one group of outer sleeve regulating holes, the lower part ofthe outer sleeve is matched with the outer wall of the supporting pipe, the outer sleeve moves up and down when being adhered on the outer wall of the supporting pipe, the lower end part of the outersleeve is hinged with the pressure lever handle; the grip type power supply switch is fixed on the supporting pipe; the inner sleeve is accommodated in an outer sleeve cavity of the outer sleeve, theinner sleeve is provided with one group of inner sleeve regulating holes, when the inner sleeve regulating holes and the outer sleeve regulating holes are mutually coincided, the inner sleeve and theouter sleeve are locked by using an inner sleeve locking member; the puncher bracket is arranged at the top end part of the inner sleeve; and the puncher is fixed on the puncher bracket and is in electrical control connection with the grip type power supply switch. The floor type indoor ceiling concrete slab bottom drilling mechanism has the advantages of ensuring stability, having safety and light integral weight, being capable of adapting to different spatial heights and being convenient for movement.

The invention relates to an erection construction method for a rearmounted pre-embedded type fastener to wall, wherein a chemical anchor widely applied to steel structure and concrete is anchored on the wall or post of a building, a steel plate embedded part with a short steel pipe is fixed on the chemical anchor, and the short steel pipe on the steel plate embedded part is connected with the a scaffold wall rod. The method comprises the following steps: (1) determining the chemical anchor; (2) placing a chemical anchor position line; (3) processing outer wall surface base material; (4) drilling holes the base material; (5) cleaning the holes; (6) putting a drug tube in; (7) screwing in a screw; (8) curing; (9) pull-out testing; (10) installing a rearmounted embedded part; (11) connecting with a wall rod and (12) acceptance checking the wall rod. The method is easy to operate, the anchoring force is reliable, the construction cost is low, the efficiency is high, convenient for detaching and turnover for many times, the safe use of a scaffold and the normal use and security of the inside of a building are effectively ensured; the damage to the original building structure is little, and the method can be widely applied to a floor type scaffold higher than 24 meters in rebuilding or refitting engineering, and the anchoring of steel structure and concrete having a concrete strength less than C20.

The invention discloses a large-span non-floor type cast-in-place beam falsework and a construction method thereof. The large-span non-floor type cast-in-place beam falsework is characterized in that two side supports are symmetrically arranged on two side bearing platforms and piers used for bearing a cast-in-place beam, embedded bearing platform steel plates are arranged at the top of the concrete bearing platforms via foundation bolts, embedded pier steel plates are respectively arranged at different height on side portions of the concrete piers via foundation bolts, vertical steel tube columns and bracket side stays are respectively arranged on the embedded bearing platform steel plates, and vertical pier column connecting steel tubes are arranged at different height between the embedded pier steel plates and the vertical steel tube columns, and horizontal bracket supports are arranged between the vertical steel tube columns and the bracket side stays, sand cylinder disassembling top caps are respectively arranged at the top of the vertical steel tube columns and the bracket side stays, double-spliced H-shaped steel is arranged on the sand cylinder disassembling top caps, and Bailey beams are arranged on the double-spliced H-shaped steel. The large-span non-floor type cast-in-place beam falsework is used in construction of cast-in-place continuous beams and continuous steel structures, foundation treatment can be omitted, and construction cost and safety risks in construction are reduced.

The invention provides an indoor unit of a split floor type air conditioner. The indoor unit comprises a front panel, a rear housing connected with the front panel to forming a receiving cavity, and a heat exchanger and fans both located in the receiving cavity, as well as a motor for driving the fan to run, wherein air outlets are formed in the front panel; the fans are axial-flow fans or mixed flow fans and are located between the heat exchanger and the front panel; at least two fans are arranged, and the indoor unit is provided with the air outlets as many as the fans; an air inlet is formed in the rear housing; the projections of the air outlets on the rear housing and the projections of the fans on the rear housing have overlapped parts with the air inlet. According to the indoor unit of the split floor type air conditioner, the airflow is capable of transversely passing through the indoor unit, the flowing distance of the airflow from the air inlet to the air outlet is shortened, and therefore, the energy loss is reduced and the overall operating efficiency is improved.

A low floor type vehicle 10 is disclosed with a housing box 59 having substantially similar longitudinal length to the longitudinal length of a seat is provided under the seat 58 and a rear cushion for the rear wheel is transversely arranged under the housing box. The housing box is provided with a lid for checking the rear cushion for the rear wheel at the bottom. The engine is suspended from a diamond type frame 20. The rear cushion for the rear wheel is arranged along the rear of an upper frame extended backward and downward from a head pipe.

The invention discloses a method for simulating a thermal characteristic numerical value of a heavy numerical control floor type boring and milling machine. The problem that an existing heavy numerical control machine tool thermal state characteristic finite element numerical analysis method is inaccurate in analysis result and low in precision is solved. According to the digital simulation method, a machine tool is adopted as a whole for thermal characteristic numerical simulation, then the thermal contact resistance of the combination faces of parts and the heat generated by a hydrostatic guideway oil film are combined, and the accuracy and precision of an analysis result are effectively improved. The method is high in analysis result accuracy and precision, and a solid foundation is laid for large-scale application and popularization of the method.

The invention provides a split type floor air conditioner which is capable of really achieving wide angle air supply, improving comfort and having more science and technology sense. According to the split type floor air, the technical scheme includes that that the whole of the split type floor type air conditioner is in a cylindrical structure, the split type floor type air condition comprises a main component and a shell, the main component comprises a heat transfer component and a ventilation component, the heat transfer component and the ventilation component are arranged in an inner cavity of the shell, the shell is provided with an air inlet and an air outlet, the split type floor air conditioner further comprises a rotating air outlet which does a reciprocating rotational motion at the inner side or at the outer side of the air outlet, the outer contour of the air outlet is arranged on a plane or a curved surface, a projection which is projected onto the plane or the curved surface of the outer contour of the air outlet by the rotating air outlet is located inside the area of the outer contour of the air outlet, the air outlet is arranged on the upper portion of the front of the shell and the air inlet is arranged on the back of the shell.

The invention discloses an air conditioner indoor unit, an air conditioner and a control method of the air conditioner. The air conditioner indoor unit comprises a shell, an upper draught fan assembly, a lower draught fan assembly, a lower air guide assembly and a shutter assembly, wherein the shell is provided with an air inlet, an upper air outlet and a lower air outlet, and the upper air outletand the lower air outlet are distributed in the vertical direction; both the upper draught fan assembly and the lower draught fan assembly are located in the shell; the lower air guide assembly is arranged at the place of the lower air outlet and comprises a first air guide set and a second air guide set which are arranged in the vertical direction, the first air guide set comprises a plurality of first air guide bars which are arranged in parallel in the left-right direction, the second air guide set comprises a plurality of second air guide bars which are arranged in parallel in the left-right direction, and both the first air guide bars and the second air guide bars are provided with a plurality of vent holes; and the shutter assembly is arranged in the upper stream position or in thedown stream position of the lower air guide assembly in the air outlet direction, and shutters can swing up and down. The upper draught fan assembly, the lower draught fan assembly the first air guideset and the second air guide set are controlled independently. The air conditioner indoor unit has the advantages of being good in air outlet effect, convenient and comfortable to use and the like.

A kind of console air condition indoor machine and its control method of door opening electrical outage are provided in the invention. This control method is used for the switchable front panel of indoor machine. When the indoor machine's front panel suddenly opens on the condition of electricity, this can control the unit's electrical outage. This air condition indoor machine includes: the case; the front panel; the air outlet part which is set upside of the front panel; the air inlet which is set on both sides of the case or on the front panel; the indoor mechanism cooling circle system, the control system and the display control part which are set inner the case. The stated air condition machine has a front panel which can turn on, self-lock turn off and has integral door type structure. One side of this front panel can fix on the case through at least a pair of pin joint fixing settings. The other side of this front panel connects with the case through at least one pair of switchable door lock settings.

A motorcycle with a low floor is configured such that secondary vibration of an engine can be largely reduced and an increase in engine width can be suppressed. The motorcycle with a low floor includes step floors on which to put a rider's feet on left and right sides of a vehicle body frame. An engine is provided between the step floors. A plurality of exhaust pipes extend respectively from cylinders of the engine, the exhaust pipes being gathered at a gathering portion. The engine is an in-line 3-cylinder engine having cylinder portions inclined forwardly. The exhaust pipes extend downwards from the cylinder portions on the basis of each cylinder. The exhaust pipes are bundled and extend on the right side of the engine, in a position on the lower side of one of the step floors.

This invention deals specifically with the use of ultraviolet light emitters within a vacuum cleaner, where the lights are used to neutralize bacterial contamination. The air and debris entering into the vacuum is exposed to one or more ultraviolet light sources, with the resulting radiation causing the bacterial contaminants to be neutralized. The vacuum used may be an upright bag vacuum, an upright bagless vacuum, a floor type vacuum, or a shop type vacuum. Multiple chambers are provided, in which the lights are disposed in secondary chambers, in addition to any lights used at the point of initial filtration.

The invention relates to a floor-type air conditioner, and an air supply method and system thereof. The air deflectors are divided into two sets, namely upper air deflectors and lower air deflectors; and each set is driven by an independent drive unit. The air supply method comprises a standard heating mode. The standard heating mode is as follows: when the air conditioner is started to operate heating, the upper air deflectors are opened to a first upward default angle which is slightly upward from the horizon, and the lower air deflectors are opened to a first downward default angle which is slightly downward from the horizon. The adhesion characteristic of the fluid is utilized to control the air flow of the air outlet, so that the outlet air flow is regionally controlled; and the air outlet is divided into two parts by the two air deflector assemblies according to the air flow wall-attachment effect, so that the air flow is regionally attached to the upper walls of the air deflector channels and is shrunk, thereby inhibiting the corrosion of the cold air flow of the upper air outlet to the outlet hot air flow. The unsynchronized air deflector control method is utilized to solve the problem of nonuniform outlet air temperature, thereby providing comfort of the air conditioner.

The invention provides a floor-type split air conditioner, as well as a refrigerant recovering method and device for the floor-type split air conditioner. The floor-type split air conditioner comprises an indoor machine and an outdoor machine, wherein a throttling device, an indoor heat exchanger, a four-way valve and a compressor which sequentially communicate are arranged in the indoor machine; an outdoor heat exchanger is arranged in the outdoor machine; one end of the outdoor heat exchanger communicates with the throttling device through a first connecting pipeline; the other end of the outdoor heat exchanger communicates with the four-way valve through a second connecting pipeline; a first stop valve is arranged on the first connecting pipeline; a second stop valve is arranged on the second connecting pipeline. According to the technical scheme adopted by the air conditioner disclosed by the invention, the compressor is arranged in the indoor machine, so that the size of the outdoor machine and the weight of the outdoor machine can be reduced; therefore, the outdoor machine is convenient to mount, and the safety of mounting workers is improved; in addition, the four-way valve is positioned in the indoor machine, so that the connection of pipelines is reduced, and the material cost is reduced.

The invention discloses a rolling and automatic cleaning device used for a split-floor typed air conditioner filter net, comprising a filter net rolling device, a cleaning device and an installation frame; the filter net rolling device and the cleaning device are both arranged on the installation frame; wherein, the cleaning device is arranged in front of the filter net rolling device; the rolling device can lead the filter net to achieve the reciprocating motion of the filter net with circular track upwards and downwards; and the cleaning device is characterized in that during the reciprocating motion process of a dust absorption pipe to the left side and the right side, the dust absorption hole scans any horizontal positions in front of the filter net, and with the staggering motion between the filter net and the dust absorption hole, the accumulated dust of all areas of the filter net is completely removed. The device has the advantages of simple structure, easy installation and production and avoiding the trouble of manual cleaning of the filter net by users.

The invention provides an indoor unit of a floor-type air conditioning chamber and a controlling method thereof. The indoor unit of the floor-type air conditioning chamber comprises strip-shaped air guiding plates and a rotation mechanism, wherein the rotation mechanism is connected with a plurality of strip-shaped air guiding plates; the plurality of strip-shaped air guiding plates are driven to rotate in a plane range in which an air outlet is located, and each strip-shaped air guiding plate is also driven to rotate around a straight line, as an axial line, on the length direction of each strip-shaped air guiding plate. The controlling method comprises the steps: driving the plurality of strip-shaped air guiding plates to rotate to a preset angle in the plane range in which the air outlet is located and stopping, and controlling the rotation of the plurality of strip-shaped air guiding plates along the axial line; or controlling the plurality of strip-shaped air guiding plates to rotate along the axial line while the strip-shaped air guiding plates are driven to rotate in the plane range in which the air outlet is located. The indoor unit of the floor-type air conditioning chamber provided by the invention has two different air feeding controlling ways; therefore, more flexible and varied air feeding modes are provided, so that user requirements can be met to a great extent, and the user experience is improved.

The invention provides a floor type air conditioner indoor unit. According to the floor type air conditioner indoor unit, two cavities are formed in the upper portion and lower portion of a shell, a draught fan part is provided with air outlet ducts which are communicated with the two cavities respectively, a first opening and a second opening are formed in the front portion and rear portion of the shell respectively, an air guiding part is installed in each cavity, each air guiding part comprises an installation part which is connected to the second opening and an air guiding wall which extends from the periphery of the installation part to the first opening in a gradually-expanding mode, the free side of each air guiding wall is installed at the position of the first opening and is provided with a cavity body in a surrounding mode, air guiding openings which extend in the direction from the second opening to the first opening and penetrate through the air guiding walls are formed in the air guiding walls, and the air guiding holes are communicated with the hollow parts in the peripheries of the air guiding walls and the cavity bodies of the air guiding walls. According to the floor type air conditioner indoor unit, an air conditioner can blow air in the vertical direction; due to the arrangement of the air guiding walls which expand gradually of the air guiding parts and the air guiding openings distributed in the outer peripheral surfaces of the air guiding walls, airflow discharged by the air guiding parts can be blown into a room with a larger outlet area and a large air volume, and the natural wind blowing feel is brought to people.

The invention discloses an air outlet plate controlling device for a split floor-type air conditioner. The device comprises a movable air outlet plate. The air outlet plate is arranged in front of an air outlet frame of the air conditioner and is driven by a rack-and-gear transmission mechanism to slide up and down along a guide rail. The device further comprises a retaining mechanism for connecting and retaining the movable air outlet plate on the guide rail, a limiting mechanism for limiting the rise / fall of the movable air outlet plate. The retaining mechanism comprises a guide rail press block arranged on the surface of the air outlet frame. The guide rail press block has a rim extending to the lateral side. A slide way is formed on the guide rail to engage with the rim. The air outlet plate controlling device has the advantages of simple structure, easy fabrication and assembly and beautiful appearance.

The invention relates to a measurement device of a scanning probe, belonging to the field of precision measurement and being applicable to the measurement of micro-displacements and two-dimensional small sizes. The measurement device comprises a mechanical probe part and a grating signal processing part, wherein the mechanical probe part comprises two layers of parallel spring leaf structures, and the two layers of parallel spring leaf structures are vertical to each other. The measurement device of the scanning probe, provided by the invention, has the advantages that: the measurement device is simple and compact in structure, small in volume, light in weight and free of frictional influence during moving; the defects of complicated structure and inconvenience in use of the traditional scanning probe are avoided; and compared with the traditional parallel spring leaf combinatorial structure adopting a floor-type structure, the measurement device is more suitable for measuring by being horizontally mounted and is dispensable of a gravity balancing mechanism.

The invention discloses a floor-type screening and crushing device. A material supply belt conveyor (1) is connected with a feed inlet of a screening machine (3) through a material supply guide tube (2). A qualified material outlet of the screening machine (3) is connected with an inlet of a funnel-shaped discharge tube (6). An unqualified material outlet of the screening machine (3) is connected with a discharge outlet of a crushing machine (4) through an unqualified material discharge tube (7). The funnel-shaped discharge tube (6) and the unqualified material discharge tube (7) are partitioned through a partition baffle (8). The big-end-up funnel-shaped discharge tube is adopted for being connected with the qualified material outlet of the screening machine, the height of the funnel-shaped discharge tube is in direct proportion to the screening capacity and the floor height, large-grain-diameter unqualified materials mixed at the qualified material outlet of the screening machine can be subjected to secondary screening and crushing, and the screening area is enlarged. The floor-type layout is adopted, so that the installing space is narrowed; and coal materials collide with the walls of guide tubes under the effect of gravity, repeated screening and crushing are achieved, and the screening effect is good.