225results about How to "Prevent rush out" patented technology

The invention discloses a magnetic field decoupling structure for direct-driven type magnetic suspension linear feed unit. A supporting block is arranged on a base and the supporting block is provided with a supporting guide rail. The guide rail is sleeved with a workbench on the outside and an auxiliary support is arranged between the bottom of the workbench and the base; the stator of a linear motor is arranged on the center of the supporting guide rail and the rotor of the linear motor is arranged on the internal side of the workbench which corresponds to the stator. Two pairs of bearing electromagnet assemblies are arranged with each electromagnet facing to each other in the longitudinal direction on the insides of the upper and lower sides of the workbench and guiding electromagnet assemblies are arranged with each guiding electromagnet facing to each other on the insides of the left and right sides of the workbench. The supporting guide rail comprises a main body consisting of pure aluminum materials and pure ferrous suction plates are arranged on the part of the main body which is relative to the bearing electromagnet assemblies and guiding electromagnets and magnetic shielding covers are sleeved with the circumferential parts of the stator and rotor of the linear motor. The magnetic field decoupling structure for direct-driven type magnetic suspension linear feed unit has reasonable structure and thus can effectively achieve the magnetic field decoupling of the magnetic suspension linear feed unit from the aspect of structure.

The invention discloses an electric automobile power battery quick-change mechanism which has simple structure, time-saving and labor-saving operations and use and convenient and quick battery change. The technical problems of time consumption, labor consumption, troublesome procedures, low efficiency, heavy workload and the like during battery removal, installation and change in the prior art is solved. The mechanism comprises a battery installing frame fixed on an automobile chassis and a battery pack arranged on the battery installing frame. One side of the battery installing frame is pivoted on the automobile chassis through a horizontal connecting shaft, the bottom of the battery installing frame is provided with a lifting mechanism which can drive the battery installing frame to rotate around the horizontal connecting shaft, and the other side of the battery installing frame opposite to the horizontal connecting shaft is provided with a battery pack inlet. The battery pack passing through the battery pack inlet is loaded to and unloaded from the battery installing frame through a sliding mechanism between a bottom board of the battery installing frame and the bottom surface of the battery pack, and a sliding stop mechanism capable of stopping the sliding of the battery pack is arranged in the battery installing frame corresponding to the battery pack inlet.

The invention relates to a long steel rail transport vehicle set capable of rapidly unloading steel rails, which is characterized by comprising an unloading operation vehicle, wherein the unloading operation vehicle is provided with a steel rail unloading device; the steel rail unloading device comprises a winding device for pulling and unloading the steel rails and a pusher for pushing the steelrails; tracks are controlled by a guiding device, a tracking device and a lifting rail door at the time of unloading the steel rails; and the winding device, the pusher, the guiding device, the tracking device, the lifting rail door are fixed on the unloading operation vehicle body in sequence along with the running direction. The long steel rail transport vehicle set is formed by grouping six types of vehicles which are successively hung in serials, namely an unloading operation vehicle, a rail transporting heading vehicle, front rail transporting vehicles, a locking vehicle I, a locking vehicle II, rear rail transporting vehicles, and a rail transporting tail vehicle, wherein the number of the front rail transporting vehicles and the rear rail transporting vehicles depends on length of the transported steel rails. The long steel rail transport vehicle set has the advantages of large carrying capacity, simple structure, safety and reliability, high working efficiency of transporting and unloading the steel rails, and lower transportation cost.

The invention relates to a method for enhancing the slotting blasting efficiency of roadway (tunnel) tunneling. The method comprises the steps that four empty holes perpendicular to a working face andwith the diameters being 78 mm are dilled in the lower middle part of a roadway (tunnel) tunneling working face, a first explosive charging hole with the diameter being 50 mm is formed in the centerof a connecting line of the empty holes and serves as a first section hole for detonating, and four evenly-distributed second explosive charging holes with the diameters being 50 mm are drilled in a circumference with the radius being 40 cm by taking the center of the connecting line of the empty holes as a circle center and serve as a second section for detonating. According to the technical scheme, an inverse detonating mode is adopted, the first explosive charging hole in the middle and the surrounding second explosive charging holes adopt the mode of hole-bottom detonating, detonating primers are all arranged at the bottom of blast holes, and energy gathering cavities of both detonators and explosive cartridges face towards the outside of the holes, so that the propagation direction ofexplosive detonating waves and the direction of throwing rock are consistent; and on the one hand, complete crushing of the rock can be ensured, on the other hand, it can be ensured that the more crushed rock can be thrown out of the hole through explosive blasting energy, so that the slotting blasting efficiency is effectively improved.

The invention discloses a system and a method for controlling the swerving of an automobile through a mobile terminal. The mobile terminal of the system comprises a swerving angle acquisition module, and a transmission module; the swerving angle acquisition module is used for acquiring the current swerving angle through the mobile terminal when the automobile swerves; the transmission module is used for transmitting the current swerving angle to an automobile microprocessor; the automobile microprocessor of the automobile comprises a swerving angle receiving module, a driving speed acquisition module, a comparison module, and a power output control module; the swerving angle receiving module is used for receiving the current swerving angle; the driving speed acquisition module is used for reading the current driving speed of the automobile; the comparison module is used for comparing the current swerving angle and the current driving speed with a judgment thread value which is set by the system to judge whether the ratio of the current driving speed to the current swerving angle is more than the preset judgment thread value; and the power output control module is used for reducing the power output value of a controller of an engine when the ratio of the current driving speed to the current swerving angle is more than the preset judgment thread value. The system can control the automobile speed when the automobile swerves to prevent the automobile from rushing out of a road surface by combining the common mobile terminal.

The anti-collision barrier with cushioning performance adopts an axisymmetric structure. The outermost side is provided with a protective cover, the inner side of the protective cover is provided with polyurethane rubber, the inner side of the polyurethane rubber is provided with anti-collision steel plates, and the inner part of the anti-collision steel plate is the fence part and The base part and the column body part include a high-damping concrete filling layer set on the inner side of the anti-collision steel plate, and energy-absorbing buffer materials are arranged between the high-damping concrete filling layers, and an anti-collision cushion is arranged on the inner side of the high-damping concrete filling layer, and the anti-collision The inner side of the buffer pad is provided with ultra-high toughness concrete, and the inner side of the ultra-high toughness concrete has sand, and multiple spring dampers and horizontal connecting steel pipes are arranged in the sand in the column body part; the center of the base part is equipped with a high-strength The anti-crack concrete column is embedded in the ground, and sand is arranged between the anti-collision steel plate of the base part and the high-strength anti-crack concrete column. The invention has the advantages that the anti-collision barrier has strong anti-collision ability, high anti-deformation ability and high stability, and can effectively protect accidents such as collisions.

The invention relates to an urban railway traffic continuous basin type beam. A beam body of the continuous basin type beam is a passage which has the basin-shaped cross section and is formed by connecting a support bottom plate, upper web plates and wing edge plates, the upper web plates are arranged at both sides of the support bottom plate, the wing edge plates are arranged at the tops of the upper web plates, at least two pairs of rail carrying tables are arranged on the support bottom plate, a power supply device, power supply cable support bodies and communication signal cable grooves are fixedly connected in the length direction of the beam body, the span of the beam body is 40m to 80m, the support bottom plate of the beam body at the side fulcrum region section and the middle spanflat and straight section is in a single layer, the rest support bottom plate of the beam body is in a closed opening box shape, in addition, the lower surface of the single-layer support bottom plate of the side fulcrum region section and the middle span flat and straight section is in smooth transition connection with the bottom surface of the box shape. The beam is arranged at the crossed transition line region section or a place required to span a large node, the urban railway traffic continuous basin type beam belongs to a bridge structural form integrating the thin-wall opening U-shapedbeam and the closed opening box-shaped beam into a whole, the problems that the ordinary railway traffic U-shaped beam cannot span large node and cannot be applied to the crossed wire transition region section are solved, and the application range of the U-shaped beam is enlarged.

The invention discloses a U-shaped girder for urban rail traffic. A girder body is connected into a channel with a U-shaped section by a bottom plate, web plates on both sides and flange plates at the top of the web plates. The upper surface of the bottom plate is connected with a support rail platform, a power supply device, a power supply cable bearing body and a communication signal cable bearing body are fixedly connected along the length direction of the girder body, the web plates on both sides are asymmetric, wherein, a bending arc even wall thickness web plate is on one side and the flange plate connected with the top of the side web plate is a 7-shaped flange plate, namely, only an inward flange is arranged; a smooth and thickness-adding bending arc non-even wall thickness web plate with the exterior of medium-and-upper-sections thereof being prominent is on the other side, and the flange plate connected with the top of the web plate is a T-shaped flange plate, namely, an internal flange and an external flange are arranged. The girder can save materials and improve the torsion resistance capacity of an opening thin-wall U-shaped girder. By utilizing the bottom plate to support the rails and trains, the girder reduces the standard height of the rails and the entire height of a bridge, diminishes the impact on the surrounding environment, and prevents the trains from running out of the bridge after running off rails. The girder is applicable to medium-span bridges with the height of about 30 meters for the urban rail traffic.

The invention provides a coal seam drilling coal-gas-water separating, conveying and containing device, comprising a dynamical-static combined type sealing and rapid mounting collector, a coal-gas separating conveyor, and a coal-water separator, wherein the collector is connected with the tail end of a hole protection tube, and is provided with a gas pump drainage opening, a coal and gas conveying opening and a drilling opening; a sealing structure sealed with a drilling rod is arranged at the drilling opening; the coal-gas separating conveyor is provided with a buffer separator, a coal-water conveying system and a supporting system; the buffer separator is provided with a gas pump drainage opening and an overload discharging door; the coal-water conveying system is a sealed system, and is communicated with the buffer separator through the overload discharging door; an output end of the coal-water conveying system is connected with the coal-water separator through a connection pipe; and the coal-water separator comprises a dewatering system, a conveying system and a supporting system. With the adoption of the coal seam drilling coal-gas-water separating, conveying and containing device provided by the invention, not only can coal, gas and water sprayed out in a drilling process of a de-dusting coal seam be effectively separated, contained and conveyed, so that the efficiency of using drilling on the coal seam can be improved; but also the stronger safe protection can be provided, and the coal seam can be safely drilled.

The invention discloses a styptic blocked plug for a viscera puncture path, which comprises a shell and an interior core, wherein the shell is provided with an opening and is made of a hydrophilic and resolvable organism degradable material, and the interior core is arranged in the shell and is mainly made of gelatin sponge. The styptic blocked plug for the viscera puncture path of the invention can not only ensure that the gelatin sponge takes the effect of hemostasia immediately, but also prevent the gelatin sponge from absorbing water prematurely to bulge. Therefore, the gelatin sponge is easily pushed to the deep part of the puncture path and cannot be dashed out easily by blood, all gelatin sponge grains are released to take the durative effect of hemostasia after the shell thaws. The styptic blocked plug has accurate, reliable, good and thorough effects of blocking and hemostasia, which is capable of curing maniple hemorrhage of the puncture path effectively and reducing or getting rid of the risk of secondary hemorrhage and massive haemorrhage; the styptic blocked plug also has a better styptic effect on the massive haemorrhage of the puncture path; and the styptic blocked plug has the advantages of wide material resource, low cost, simple preparation, convenient use, no any toxic and side effect and wide application prospect.

Provided is a racing car model control system and a control method. The control system comprises a motor, a steering engine, a power supply, laser transmitting tubes, laser receiving tubes and a micro-controller. A racing car module is located on a white racing rack with two black edges, and in the running process, the micro-controller controls the laser transmitting tubes at different positions to emit laser signals and controls deflection of the steering engine and output of the motor according to the situation whether the laser receiving tubes corresponding to the laser emitting tubes for emitting laser receive laser diffuse reflecting signals. The racing car model control system judges the condition of the racing track in the front through the fed back diffuse reflecting signals to carry out speed adjustment and steering adjustment, detecting distance is prolonged, time preserved for adjustment of the micro-controller is correspondingly prolonged, load of the steering engine during steering is greatly reduced, running safety of the racing car model is improved, the racing car model is effectively prevented from rushing out of the track, meanwhile control flexibility and promptness are also improved, and running speed and safety stability of the racing car model are ensured.

The invention discloses an improved roots vacuum pump which comprises a shell, a rotor cavity, an inner sleeve and a cooling cavity, wherein a partition plate is connected in the cooling cavity; the cooling cavity is divided by the partition plate into a first cooling water channel on the inner side and a second cooling water channel on the outer side; the first cooling water channel is connectedto a water inlet in a penetrating manner; the second cooling water channel is connected to a water outlet in a penetrating manner; a cylindrical cavity is formed in the bottom of the cooling cavity; aresidue storage tank is connected below the cylindrical cavity in a penetrating manner; a rotary shaft is inserted into the cylindrical cavity; a rotary knob is connected to the outer side of the rotary shaft; the part, located on the inner side of the cylindrical cavity, of the rotary shaft is connected to a first metal frame; a second metal frame is also connected to the rotary shaft; the second metal frame and the first metal frame are mutually perpendicular, an arc-shaped panel is fixedly connected to the outer side of the second metal frame, brushing hairs are connected to the outer sideof the arc-shaped plate, and an arc-shape screen is connected to the outer side of one end of the first metal frame. According to the improved roots vacuum pump disclosed by the invention, defects inthe prior art can be improved, and blockage of the cooling water channels as a result of metal residues of the cooling cavity of the pump can be prevented.

The invention provides a scissors-type simple lifting utility garage comprising a base, hydraulic cylinders, scissors supports, a carrying plate, and a mechanical safety hook interlocking device. The hydraulic cylinders and the scissors supports are arranged on two sides of the base. Each scissors support comprises a first pillar and a second pillar; the pillars are movably connected in the middle to form an X shape; one end of the second pillar is movably connected to the carrying plate through a roller; the other end of the second pillar is provided with a third roller; the rollers are arranged in rail channels. The scissors-type simple lifting utility garage occupies small area, multiplied cars can be parked on the scissors-type simple lifting utility garage and are convenient and safe to access, the parking difficult is conveniently overcome, an ascent detection switch and a descent detection switch ensure that the cars are safe and reliable to access; by adding the mechanical safety hook interlocking device, the whole frame is prevented from slipping down, namely the carrying plate never descends in normal conditions, and the cars can be safely and reliably stored on the carrying plate.

The invention discloses a self-power-generating type energy saving barrier gate used for a toll station. The self-power-generating type energy saving barrier gate comprises an installation groove formed in the ground. Two rotary shafts are symmetrically and rotationally connected to the front end and the rear end of the installation groove. A first lane board and a second lane board are symmetrically and fixedly connected to the two rotary shafts. A linkage mechanism is arranged between the first lane board and the second lane board. Buffer springs are fixedly connected between the bottoms ofthe ends, away from the rotary shafts, of the first lane board and the second lane board and the bottom of the installation groove. Two fixing piles and two vehicle license plate recognition instruments are symmetrically and fixedly connected to the ground on the two sides of the installation groove. The weight of vehicles coming and going is used for transmission, two sets of barrier gate bars are automatically lifted and released, manual operation and electric drive are not needed, use is convenient, and energy is saved; and kinetic energy generated in the reset process of the two lane boards can be converted into electric energy which is stored into a storage battery and provided for the vehicle license plate recognition instruments to be used, the self-power-generating process is achieved, and electric power losses of the barrier gate of the toll station can be saved to the great extent.

The invention discloses a mountain road protection railing and belongs to the field of road safety. The mountain road protection railing comprises a plurality of vertical columns, rollers and transverse rods. The vertical columns are arranged along the edge of a road. The lower end of each vertical column is fixedly connected with the ground. The upper ends of every two adjacent vertical columns are fixedly connected through the corresponding transverse rod. The middles of the vertical columns are sleeved with the rollers. The rollers are connected with the vertical columns through bearings. The rollers, the vertical columns and the bearings are coaxially arranged. Impact force of vehicle collision can be resolved, the mountain road protection railing only bears the impact force perpendicular to the protection railing without bearing the impact force parallel to the protection railing, and thus the vehicle can be effectively prevented from rushing out of the road; and the construction cost is reduced while loading capacity of the protection railing is improved.

The invention discloses a cableway trolley transport system including a steel cable, characterized by, but also a tram, blocking device, The trolley is driven on a steel cable, Person or goods can betransported, The locking device is fixed at the end part of the cable in order to prevent the tram from rushing out of the cable due to out of control.The trolley comprises a frame, wheels, an electric motor, a battery, a controller, frame supporting wheels and carrying goods, wherein the wheels are mounted on the steel cable, the electric motor drives the wheels to rotate, the trolley is drivenby the friction force between the wheels and the steel cable, the battery provides electric power, and the controller controls the operation of the trolley. The invention has the advantages of simplestructure and low construction difficulty.

This invention discloses a solid fuel torch which cracks the problems as instable burning, short-time burning, light-color flame and low visibility when the torch is under low temperature, voltage and heavy wind. The torch includes the fuel bin that loads the solid or gel fuel, the burning unit that connects to the top of the fuel bin. The side wall of the burning unit has holes and the inside sets heat-feedback unit of which the bottom attaches to the fuel. The pusher which connects to the bottom of fuel bin pushes the fuel forward the burning unit. The structure of multi-hole and heat-feedback can keep the continue burning and improve the flame burning thickness when the torch is under heavy wind, low temperature and voltage so as to improve the flame color and visibility and satisfy many displaying function.

The invention provides a short-distance takeoff ideal scheme of a running take-off airplane. The core technology is that a runway is divided into a fixed part and a dynamic part, and the fixed part is closely connected with the dynamic part, so that the airplane is static relative to the fixed runway when running on the dynamic runway and enters into the fixed runway till being accelerated at a preset speed on the dynamic runway, therefore, the airplane can realize the short-distance takeoff under the status of high initial speed and large kinetic energy. The airplane not only meets the best requirements of the aircraft carrier airplane such as short-distance takeoff, full-load takeoff and full-oil takeoff, but also has the capability of short-distance landing. A crawler type integrated dynamic runway has the functions of short takeoff and landing, can be used for preventing the airplane from rushing out of the runway in a land aerodrome, can be used for building a military field aerodrome, can be used for building a temporary takeoff and landing point for the vehicle-mounted (carrier-based) military aircraft, possibly brings the development direction of the miniaturization and the submarine trend of the aircraft carrier, and possibly brings the great change of an air operation mode. The airplane jointly uses three schemes such as a crawler type integrated dynamic runway, a three-point type synchronous running wheel short-distance take-off airplane, a straight line type synchronous column wheel short-distance take-off airplane, and the like.

The invention discloses a dust hood for a drilling machine. An inner hood (1) is arranged inside of an outer hood (4) by a connecting plate (2); the side wall of the outer hood (4) is connected with a dust outlet (5); the top of the outer hood (4) is provided with a mounting plate (3); a cup-like sealing hood (7) and an annular sealing plate (8) are assembled on the mounting plate (3); and a dust-proof belt plate (10) is arranged on the bottom edge of the outer hood (4) and the dust outlet (5). The dust hood of the invention can prevent dust rushing upwards in the drilling process, can prevent the dust from spilling over, can prevent the discharged dregs from falling in a shot hole when moving the drilling machine, and has simple structure and reliable property.

The invention relates to anti-collision barrelincluding a guard rail body and a rotating drum, A main body of that guard rail body includes an upright post and a first cross bar and a second cross bar, the columns are parallel and spaced apart, the first cross bar and the second cross bar are perpendicular to the upright post, A first cross bar and a second cross bar are arranged parallel and spaced apart from each other, A rotary drum includes a rotating shaft and a sleeve, The inner cavity of the sleeve is arranged as a hollow cavity, the axial two ends of the sleeve are respectively provided with blocking caps, the two ends of the rotating shaft are fixedly connected with the blocking caps and the two ends of the rotating shaft are exposed with the blocking caps, the sleeve is arrangedbetween the first cross bar and the second cross bar, and the rotating shaft penetrates between the first cross bar and the second cross bar and is rotatably connected with the first cross bar and thesecond cross bar. Due to the rotatability of the rotating drum, the rotating direction of the sleeve forces the runaway vehicle to change direction and return to the normal driving direction, so as to prevent the vehicle from rushing out of the road, protect the vehicle and passengers, reduce the loss caused by the accident, and have a good anti-collision effect.

The invention provides a protective fence plate mechanism used for road and bridge engineering. The protective fence plate mechanism used for road and bridge engineering comprises bases, protective net storage chambers and buffering slide blocks; one group of protective fences is connected to the rear end surface of each base through four groups of bottom connecting rods; the two adjacent groups of protective fences are connected with each other through multiple groups of side connecting rods; two groups of oil pressure buffers are arranged on the internal sides of the lower parts of the basesand the protective fences; and in a normal state, the bases are fixedly connected with the protective fences through bolts. As protective nets are arranged, vehicles are protected, the vehicles are prevented from falling off from a gap after rushing out a pavement; according to the protective fence plate mechanism used for road and bridge engineering, through adoption of a multi-stage protectionand blocking mode, the vehicles are prevented from rushing out the pavement to fall off to cause tragedies, the safety is greatly enhanced, the floor space is smaller, the manufacturing cost is low, and the protective fence plate mechanism used for road and bridge engineering is suitable for substantial promotion.

The invention belongs to the technical field of road safety piles and particularly relates to a safety road pillar based on weight block buffering. The safety road pillar comprises a weight block, a steel wire rope, a buffering rotary corner mechanism, a first support, a transverse supporting bar, bent pillars, a steel wire splitting plate, a guide pillar and the like; the four bent pillars are mounted on the transverse supporting bar between the first support and a second support in sequence at equal distance intervals; the steel wire rope penetrates through steel wire holes in the four bent pillars and the tail ends of the steel wire ropes are fixedly mounted on the steel wire splitting plate; the weight block is mounted below the steel wire splitting plate through three pull wires; when a car collides with the bent pillars, the transverse supporting bar is released from the first support and the second support if the car speed is very high; the steel wire rope pulls up the weight block and a buffering spring in the buffering rotary corner mechanism is compressed; the safety road pillar is simple in structure; and when the car collides with the road pillar, the matching of the weight block and the buffering rotary corner mechanism can have effective buffering effect and the damage degree of the car is alleviated. The safety road pillar has relatively strong practical effect.

The present invention relates to the technical field of traffic safety accessory devices, in particular to an emergency avoidance protection device for highways, which can improve the deceleration ability of automobiles, can effectively decelerate automobiles with large kinetic energy until they stop, and improve safety; and can Effectively prevent the car from stopping and the cargo rushing out due to inertia, avoiding losses; including sequentially connected driving-in area, first deceleration area, first buffer area, second deceleration area, second buffer area, and third deceleration area and the collision buffer zone, both ends of the first deceleration area are provided with triangular supports, and multiple sets of roller shafts are arranged between the two sets of triangular supports, and the two ends of the multiple sets of roller shafts are rotationally connected with the two sets of triangular supports through ball bearings. The first buffer zone is provided with the first interception net, the second deceleration zone is provided with artificial sand, the second buffer zone is provided with the second interception net, the third deceleration zone is provided with medium sand, and the collision buffer zone is provided with anti-collision barrels and elastic damping plate.

The invention discloses a gas extraction-water injection integrated under-pressure grouting hole sealing device and method. The gas extraction-water injection integrated under-pressure grouting hole sealing device comprises an extraction pipe, an outer bag grouting pipe and a water injection hole sealing structure. A plurality of extraction pipe holes are formed in the top of the extraction pipe,extraction pipe outer bags are separately arranged outside the front end and the rear end of the extraction pipe, and inner bags are separately arranged inside the front end and the rear end of the extraction pipe. The outer bag grouting pipe is arranged outside the extraction pipe and penetrates through the inner part of the two extraction pipe outer bags. The water injection hole sealing structure is arranged in the extraction pipe in a sleeved mode, and the water injection hole sealing structure includes an inner bag grouting pipe and a water injection steel pipe. The gas extraction-water injection integrated under-pressure grouting hole sealing device and method can effectively utilize extraction drilling holes, and a bedding gas extraction hole is proposed to be used for injecting water in front of a working surface; on the one hand, the construction problem of water injection hole drilling can be solved, and a large amount of hole drilling construction costs are saved; on the other hand, the time and space contradiction of coal seam gas extraction and coal seam water injection can be solved; and water injection hole sealing is achieved on the basis of an extraction and hole sealing structure so as to achieve gas-water injection integrated hole sealing.

The invention discloses an improved roots vacuum pump which comprises a shell, a rotor cavity, an inner sleeve and a cooling cavity, wherein a partition plate is connected in the cooling cavity; the cooling cavity is divided by the partition plate into a first cooling water channel on the inner side and a second cooling water channel on the outer side; the first cooling water channel is connectedto a water inlet in a penetrating manner; the second cooling water channel is connected to a water outlet in a penetrating manner; a cylindrical cavity is formed in the bottom of the cooling cavity; aresidue storage tank is connected below the cylindrical cavity in a penetrating manner; a rotary shaft is inserted into the cylindrical cavity; a rotary knob is connected to the outer side of the rotary shaft; the part, located on the inner side of the cylindrical cavity, of the rotary shaft is connected to a first metal frame; a second metal frame is also connected to the rotary shaft; the second metal frame and the first metal frame are mutually perpendicular, an arc-shaped panel is fixedly connected to the outer side of the second metal frame, brushing hairs are connected to the outer sideof the arc-shaped plate, and an arc-shape screen is connected to the outer side of one end of the first metal frame. According to the improved roots vacuum pump disclosed by the invention, defects inthe prior art can be improved, and blockage of the cooling water channels as a result of metal residues of the cooling cavity of the pump can be prevented.

The invention provides an efficient water-saving toilet bowl which comprises a flushing pipeline, a blow-off pipeline, an ejection pipeline and a barrel cylinder. The flushing pipeline is composed of a water inlet, a water distribution pipe, a flushing pipeline inlet, a flushing pipeline and a flushing opening, wherein water flows into a water tank through the water inlet, enters the flushing pipeline after being distributed by the water distribution pipe, and enters the barrel cylinder through the flushing opening for flushing. The blow-off pipeline is composed of a blow-off opening and a blow-off pipe. The blow-off pipe is communicated with the blow-off opening located in the bottom of the barrel cylinder. Water flushing the barrel cylinder enters the blow-off pipe for blow-off, the blow-off pipe is in a bent S shape. The ejection pipeline is composed of a water inlet, a water distribution pipe, an ejection pipe inlet, an ejection pipe and an ejection hole, wherein water flows into the water tank through the water inlet, enters the ejection pipe inlet after being distributed by the water distribution pipe, then passes through the ejection pipe, produces jet water flow at the ejection hole in the tail end of the ejection pipe, and produces the siphonage under the strong water pressure effect.

The present invention discloses a concealed garbage incineration charging equipment. It is characterized by that on the surface of lower layer carriage body of said charging carriage which is covered with upper layer carriage body two auxiliary guideway parallel to guideway are set, on said auxiliary guideway an auxiliary charging carriage is set, the front end of the described auxiliary charging caariage is extended from front end of upper layer carriage body of charging carriage, and is supported by wear-resistant slide block, in the rear portion of undersurface of said auxiliary charging carriage two wheels are mounted, said wheels are supported by correspondent auxiliary guideway, and can be forwards or backwards rolled. Said equipment can greatly raise charging efficiency.

The invention provides a tunneling carbon dioxide phase change directional pressure relief cracker and an application method thereof. The cracker comprises a liquid storage pipe used for storing liquid-state carbon dioxide, a filling valve, a heater and an explosion venting head. The explosion venting head comprises an explosion venting pipeline of a Y-shaped structure, the explosion venting pipeline comprises a first pipeline, a second pipeline and a third pipeline, the first pipeline, the second pipeline and the third pipeline are in communication, one end of the first pipeline is connectedwith the liquid storage pipe, the other end of the first pipeline is obliquely connected with the head end of the second pipeline and the head end of the third pipeline, and the tail end of the secondpipeline and the tail end of the third pipeline face the free face of a to-be-tunneled roadway and are provided with an explosion venting opening. The explosion venting opening is used for carrying out explosion venting on carbon dioxide gas, and the included angle of the explosion venting opening and the axis of a drilled hole is smaller than 90 degrees. The cracker is fixed in the drilled holein an inverted manner and can impact on the hole wall along the oblique angle in the explosion venting direction in the exploding process, the advantage that impact waves are released towards an orifice along the reflection angle is achieved, and the problem about stability of existing crackers in drilled holes is solved. Energy losses are reduced, and the danger of counter impacting of the cracker is eliminated.

The invention discloses a multi-piece valve disk (T, T'), in particular a multi-piece valve disk (T, T') of a sliding and / or seat valve (V). In the multi-piece valve disk (T, T'), a ring seal (R, R') with an elastic sealing ring (17) with an external sealing zone (31) is placed in a ring groove (N) of the valve disk (T, T') onto a dimensionally stable backup ring (16, 16'), and where an elastic restoring region (33) effectively positioned between the backup ring (16, 16') and the external sealing zone (31) is arranged in the backup ring (16, 16'), the restoring region (33) being embodied in one piece with the sealing ring (17) of its material adjacent to the external sealing zone (31) of the sealing ring (17).

The invention relates to the field of lifting arms, and discloses a structure and method for preventing an oil cylinder from rushing out of a knuckle arm and a lifting arm. The structure for preventing the oil cylinder from rushing out of the knuckle arm comprises the knuckle arm and the oil cylinder. A plug pin is arranged on either of the knuckle arm and the oil cylinder, and a pin hole is formed in the other one of the knuckle arm and the oil cylinder. Centering induction blocks axially spaced and a front induction block are arranged on either of the inner surface of the knuckle arm and the outer surface of the oil cylinder, and centering testing pieces and a front testing piece which can induct objects correspondingly to the centering induction blocks and the front induction block respectively are arranged on the other one of the inner surface of the knuckle arm and the outer surface of the oil cylinder. When induction is conducted through the centering testing pieces and the centering induction blocks, the plug pin can be inserted and pulled relative to the pin hole. After induction is completed through the centering testing pieces and the centering induction blocks and when induction is conducted through the front testing piece and the front induction block, the oil cylinder stops extending forwards relative to the knuckle arm, and the plug pin is located in the pin hole so that the plug pin and the pin hole can be effectively and timely locked; in addition, the oil cylinder is prevented from extending forwards, the protection reliability is improved, and the structure is simple.