31results about How to "No need to add length" patented technology

The invention provides an EGR (exhaust gas recirculation) mixer with small occupied space and high mixing efficiency. The EGR mixer comprises a first chamber and a second chamber, wherein the first chamber includes a first air inlet and an air outlet, the second chamber includes a second air inlet, and the second chamber is communicated with the interior of the first chamber through a plurality of air vents arranged on the walls of the first chamber. Fresh air and EGR exhaust gas can respectively enter the chamber through the first air inlet and the second air inlet and can be uniformly mix in the first chamber due to the mutually vertical flow directions. The EGR mixer provided by the invention has a small and exquisite structure; as two chambers are arranged, the flow directions of the exhaust gas and the fresh air can be vertical, thus improving the mixing uniformity and the mixing efficiency without increasing the length of air inlet pipelines; and the exhaust gas and the fresh air can be completely and uniformly mixed before entering the engine cylinder, thus satisfying the steady operation of the engine. Besides, a pressure-regulating valve is not needed to be additionally installed in the use of the EGR mixer; therefore, the costs can be saved.

The invention discloses a device for weakening the rarefaction wave of a hydrogen-oxygen detonation shock tube, which includes a detonation driving section, a transition section, a driven section, a diaphragm and a baffle. The detonation driving section, the transition section and the driven section are connected in sequence. The diaphragm is arranged at the joint of the detonation driving section and the transition section. The baffle is arranged at the joint of the transition section and the driven section. The upper end of the baffle is hinged to the pipe of the transition section or of the driven section. After the incident shock wave formed by the detonation driving section breaks the diaphragm, the baffle is lifted up to allow the incident shock wave to pass and be propagated to the driven section. Part of the incident shock wave is reflected by the baffle and interferes with rarefaction wave, so that the attenuation effect of the rarefaction wave on the incident shock wave is weakened, and the steady flow time of the incident shock wave is prolonged. After the incident shock wave passes through the baffle, the baffle is closed again under the action of gravity. The invention further provides a method for weakening the rarefaction wave of a hydrogen-oxygen detonation shock tube. Through the device and the method, the rarefaction wave of a hydrogen-oxygen detonation shock tube can be weakened, and the steady gas flow used in experimental study can exist longer.

The invention provides a key and card slot combined structure and a mobile terminal. The key and clamping groove combination structure comprises a clamping groove. The card slot comprises a card support and a surface cover arranged at one end of the card support. At least one key is arranged on the surface cover. The surface cover is provided with a plurality of keys, the keys protrude out of theouter surface of the surface cover, the positions, corresponding to the keys, of the surface cover are provided with touch pressure sensors used for sensing the pressing operation of the keys, the keyand clamping groove combination structure further comprises induction signal contacts arranged on the clamping grooves, and the induction signal contacts are electrically connected with the touch pressure sensors. The surface cover is provided with the keys and the touch pressure sensor, so that the keys and the surface cover are combined, and then the keys and the clamping grooves are combined into an integrated structure. Through arranging the induction signal contacts on the clamping grooves, the length of the surface cover does not need to be increased, the strength of the surface cover is guaranteed, and the problem of breakage or deformation in the using process is better prevented.

The invention provides an underground coal mine fracture sealing device and method. The underground coal mine fracture sealing device comprises a water injection pipe, a thick liquid return pipe, a front polyurethane hole sealing section, a back polyurethane hole sealing section, a safety valve, an umbrella type supporting device assembly and a thick liquid injection pipe. The umbrella type supporting device assembly is composed of an umbrella supporting frame, a supporting pipe, a sliding hoop, a piston rod and a piston, and a guide rail groove and the safety valve are arranged on the supporting pipe. When being fed into a drill hole, the umbrella type sealing device shrinks, and then the device is conveniently fed into the drill hole. When high-pressure water of which the initial injection pressure is 5MPa is injected, the umbrella type supporting device is opened, the piston is pushed forwards, the umbrella type supporting frame is unfolded and penetrates into coal, the high-pressure water continuously squeezes the hole sealing sections, and then the umbrella type supporting frame penetrates into the coal deeper and deeper. When the water injection pressure is increased to be larger than or equal to 15MPa, pressure water breaks through the safety valve to carry out fracturing operation on the drill hole, and therefore pressure loading capacity of the hole sealing sections is greatly improved, water injection pressure is increased, and the fracturing effect is improved. The underground coal mine fracture sealing device is simple in structure, easy to operate, high in pressure loading capacity, and good in sealing effect.

The invention discloses a tunneling movable dust removal device which comprises a ventilating pipe. The ventilating pipe is connected with a dust removal chamber, the two sides of the dust removal chamber are respectively provided with a traveling device, a spray device is arranged in the dust removal chamber, a water collecting tank is arranged below the dust removal chamber, an air outlet is arranged on the dust removal chamber, an inlet of a water suction pump is connected with the water collecting tank, and an outlet of the water suction pump is connected with the spray device. A filtered water dust removal net is obliquely arranged below a dust outlet of the ventilating pipe, and the lower end of the filtered water dust removal net is provided with a silt chute outlet. A silt sediment tank is arranged below the filtered water dust removal net, one end of the silt sediment tank is provided with a grid water outlet, a desilting overflow weir is arranged near the grid water outlet, and a silt-flushing open-close channel is arranged near the desilting overflow weir. The dust removal device disclosed by the invention can move along with the moving of a tunneling machine, so that the effect of dust removal is enhanced. The dust removal device can effectively absorb 90% and more of dust in front of a tunnel face, so that a good sight and relatively clean air are provided for drivers of tunnel boring machines and other operators.

The invention is applicable to the field of mobile terminals. Provided is a handset receiver groove structure which comprises a mobile phone rear shell, a front shell arranged opposite to the mobile phone rear shell, and a top shell arranged at the end parts of the mobile phone rear shell and the front shell, wherein the inner wall surface of the top shell is convexly provided with at least one back-off structure, the back-off structure is arranged opposite to the inner wall surface of the mobile phone rear shell, the inner wall surface of the top shell and the inner wall surface of the back-off structure enclose to form a receiver groove for accommodating a receiver, and an adhesive layer is arranged between the back-off structure and the mobile phone rear shell. Based on the mobile phonereceiver groove structure, the back-off structure is arranged on the top shell of the mobile phone; therefore, the top shell and the mobile phone rear shell can be connected and sealed through the inverted buckle structure; therefore, enough effective adhesive area between the top shell and the rear shell of the mobile phone can be ensured so as to ensure the stability and the sealing performanceof connection, the thickness of the top shell and the length of the whole mobile phone do not need to be increased, and the requirements of IPX2 protection level and the requirements of appearance and portability of the mobile phone can be met at the same time.

The invention provides a slider structure. The slider structure is used for clamping or inserting a workpiece and comprises a connecting rod assembly, at least one rotating assembly, a guide base andat least one functional assembly. The connecting rod assembly is connected with the rotating assembly; one rotating assembly is connected with at least one functional assembly; and the rotating assembly and the functional assembly are both slidably connected with the guide base. Under the driving of a power source, the connecting rod assembly drives the rotating assembly to rotate on the guide base, and the rotating assembly drives the functional assembly to slide along the guide base so that the functional assembly is clamped or inserted into the workpiece. The invention also relates to an injection mold adopting the above-mentioned slider structure; by using the slider structure, the power source drives the rotating assembly to rotate after driving the connecting rod assembly to move, sothat the functional assembly is further moved in the guide base, and the functional assembly is clamped or inserted into the workpiece so as to realize more convenient operation, and meanwhile the efficiency for processing the workpiece is improved.

The invention discloses a device for weakening the rarefaction wave of a hydrogen-oxygen detonation shock tube, which includes a detonation driving section, a transition section, a driven section, a diaphragm and a baffle. The detonation driving section, the transition section and the driven section are connected in sequence. The diaphragm is arranged at the joint of the detonation driving section and the transition section. The baffle is arranged at the joint of the transition section and the driven section. The upper end of the baffle is hinged to the pipe of the transition section or of the driven section. After the incident shock wave formed by the detonation driving section breaks the diaphragm, the baffle is lifted up to allow the incident shock wave to pass and be propagated to the driven section. Part of the incident shock wave is reflected by the baffle and interferes with rarefaction wave, so that the attenuation effect of the rarefaction wave on the incident shock wave is weakened, and the steady flow time of the incident shock wave is prolonged. After the incident shock wave passes through the baffle, the baffle is closed again under the action of gravity. The invention further provides a method for weakening the rarefaction wave of a hydrogen-oxygen detonation shock tube. Through the device and the method, the rarefaction wave of a hydrogen-oxygen detonation shock tube can be weakened, and the steady gas flow used in experimental study can exist longer.

The invention discloses a cross arm for an angle tower. The angle tower comprises a tower body, wherein one end of the cross arm is connected with the tower body, and one end, far from the tower body, is a free end and is used for being connected with a lead; the free end comprises an end part connecting component and an extension component, and the extension component is fixed with the end part connecting component and extends from the end part connecting component in a projection of a horizontal plane; and the lead is connected to the extension component, and an included angle between the extension component and the central line of the cross arm is larger than the included angle between the lead and the central line of the cross arm. By utilizing the extension component, the distance from the lead to the angle tower can be increased while a corner angle is met, the requirements of an electrical gap between the lead and the angle tower are met, and the cross arm does not need to be lengthened.

The invention relates to a rolling control method of bars of medium specifications, and belongs to a material processing engineering technique. When rolled pieces of intermediate billets of the bars are conveyed in a roller way between units, a multi-station rotary cooling mechanism is additionally arranged in an area above the roller way of a rolling line, and the intermediate billets are liftedand rotated and then are put in the roller way of the rolling line, so that the rolled pieces rotate during movement and are uniformly cooled to the required temperature, and the rolling control is realized in the subsequent unit. According to the rolling control method, the rotary cooling mechanism can be matched with water cooling of the intermediate billets and can be separately used; the equipment structure is compact, an additional site is not needed, and the length of a workshop does not need to be increased; the bar microstructures are uniform, and the difference between the grain sizesof the surface and the central structure is less than the 0.5 level; the rolling control method is suitable for a stripping production line between a rough rolling unit and an intermediate rolling unit or between the intermediate rolling unit and a finish rolling unit; and the rolling control method can be used for producing diameter bars, and when the method is used for producing the bars of medium specifications, the problems of difficulty in uniform cooling of the intermediate billets on a continuous rolling production line and influence on the production efficiency can be solved.

The invention provides a coupler, and belongs to the technical field of carriage connection. The coupler is fixed on a traction beam, and comprises a coupler body and a rod body extending from the coupler body, wherein the coupler body is positioned outside the traction beam, and the coupler body is positioned inside the traction beam; a mounting seat is provided with a first through hole and a plurality of first mounting holes, the axial direction of the first through hole is parallel to the longitudinal direction of the traction beam, the axial directions of the first mounting holes are parallel to the transverse direction of the traction beam, and the mounting seat is positioned in the traction beam and is connected with the traction beam through bolts inserted in the first mounting holes; one end of a buffer device passes through the first through hole and is connected with the rod body, and the other end of the buffer device is abutted against the mounting seat. The coupler can reduce the potential safety hazard of the carriage, save the installation space of a retractor, and also prevent the carriage from shaking when just subjected to the traction force of the retractor.

In order to solve the problem that existing photodetectors have low responsivity and cannot meet the requirements of high optical power detection, an embodiment of the present application provides a photodetector, which relates to the technical field of photodetectors, and the photodetector includes: a silicon layer , the silicon layer includes a doped region of the first doping type; a germanium layer in contact with the silicon layer, the germanium layer includes a doped region of the second doping type; a silicon nitride waveguide, the nitride A silicon waveguide is disposed around the germanium layer along the extension direction of at least three sidewalls of the germanium layer; wherein the silicon nitride waveguide is used to transmit an optical signal and couple the optical signal to the germanium layer, The germanium layer is used to detect the optical signal and convert the optical signal into an electrical signal.

The invention provides a vehicle coupler, which belongs to the technical field of carriage connection. The vehicle coupler is fixed on a traction beam. The pull hook includes a hook body and a rod body extended from the hook body, and the hook body is located outside the traction beam, and the hook body is located inside the traction beam; The seat is provided with a first through hole and a plurality of first mounting holes, the axial direction of the first through hole is parallel to the longitudinal direction of the drawing beam, the axial direction of the first mounting hole is parallel to the transverse direction of the drawing beam, and the mounting seat is located in the drawing beam. And it is connected with the traction beam through the bolt inserted in the first installation hole; one end of the buffer device is connected with the rod body through the first through hole, and the other end of the buffer device abuts against the mounting seat. The vehicle coupler provided by the invention can reduce the potential safety hazard of the carriage and save the installation space of the draw hook, and at the same time, avoid the shaking of the carriage when it just receives the traction force of the draw hook.

The invention provides display equipment which comprises a shell and a display screen module. The display screen module is placed in the shell; and a mounting screw hole is placed on the display screen module. The display equipment further comprises a switching nut column. The nut column comprises a nut and a stud which are fixedly connected together. The stud is connected in the mounting screw hole in a threaded mode. The switching nut column is supported between the display screen module and the back side of the shell. A mounting hole is further formed in the back side of the shell, and is placed opposite to a screw hole of the nut. Because the stud of the switching nut column is connected on the mounting screw hole of the display screen module in the shell of the display equipment in a threaded mode, the nut is against the back side of the shell, the switching nut column is supported between the back side of the shell and the mounting screw hole, a sink pit is not needed to be arranged in the back side of the shell of the display equipment, and wall hanging requirements of a video electronics standards association (VESA) standard can be satisfied without adding extra accessories.

In order to solve the problem that the existing photodetector has obvious saturated absorption effect and low responsivity, an embodiment of the present application provides a photodetector, which relates to the technical field of photodetectors. The photodetector includes: a silicon layer, the The silicon layer includes a doped region of the first doping type; a germanium layer in contact with the silicon layer, the germanium layer includes a doped region of the second doping type; a first layer waveguide, the first layer waveguide includes A first detection coupling region disposed above the germanium layer; a second layer waveguide, the second layer waveguide including a second detection coupling region disposed on the side of the germanium layer; wherein, the first layer waveguide and the second layer waveguide The second-layer waveguide is used to transmit optical signals, and the first-layer waveguide and the second-layer waveguide respectively couple the optical signal to the a germanium layer; the germanium layer is used to detect the optical signal and convert the optical signal into an electrical signal.

The invention relates to the technical field of engines, in particular to a gas engine intake system, a gas engine and an automobile. The system comprises a first cylinder set, a second cylinder set, a plurality of oil nozzles, an intake manifold, an intake elbow and a spacer; the first air cylinder set comprises at least one air cylinder, the second air cylinder set comprises at least one air cylinder, and the air cylinders in the first air cylinder set and the air cylinders in the second air cylinder set are arranged in one-to-one correspondence with the oil nozzles; the intake ends of the oil nozzles are connected with the intake manifold; the intake end of the intake manifold is connected with the intake elbow; and the spacer is arranged in the middle of the intake manifold and divides the intake manifold into a first intake part and a second intake part, the first intake part is used for providing fuel gas to the first cylinder set, and the second intake part is used for providing fuel gas to the second cylinder set. According to the gas engine intake system, airflow between two cylinders with air fed in sequence cannot interfere with each other only by additionally arranging the spacer in the intake manifold, and therefore the purpose of uniform intake is achieved, and the design has a high degree of freedom.

In order to solve the problem that existing photodetectors have low responsivity and cannot meet the requirements of high optical power detection, an embodiment of the present application provides a photodetector, which relates to the technical field of photodetectors, and the photodetector includes: a silicon layer , the silicon layer includes a doping region of the first doping type; a germanium layer in contact with the silicon layer, the germanium layer includes a doping region of the second doping type; a silicon nitride waveguide, the nitride The silicon waveguide includes a first waveguide region and a second waveguide region, the germanium layer is arranged between the first waveguide region and the second waveguide region; a light splitting waveguide connected to the silicon nitride waveguide, the light splitting The waveguide is used to divide the received optical signal into at least two optical signals, and output the two optical signals to the first waveguide region and the second waveguide region respectively; wherein, the silicon nitride waveguide is used for transmitting an optical signal and coupling the optical signal to the germanium layer; the germanium layer is used to detect the optical signal and convert the optical signal into an electrical signal.

The present application provides a combined structure of a button and a card slot and a mobile terminal. The combined structure of a button and a card slot includes a card slot, and the card slot includes a card holder and a cover provided at one end of the card holder. The cover There is at least one button on the top, and the button protrudes from the outer surface of the cover, and the position corresponding to the button is provided with a touch sensor for sensing the pressing operation of the button, and the button The combined structure with the card slot also includes an inductive signal contact arranged on the card slot, and the inductive signal contact is electrically connected with the touch pressure sensor. The application sets buttons and touch sensors on the cover to combine the buttons and the cover, and then combines the buttons and the card slot into an integrated structure; by setting the induction signal contacts on the card slot, there is no need to increase Length to ensure the strength of the cover and better prevent breakage or deformation problems during use.