30results about How to "Solving fixed difficulties" patented technology

The invention discloses a device and a method suitable for monitoring the elevation change of a bearing of a turbo generator set. The device comprises testing devices, a communicating pipe network and a data acquisition device, wherein the testing devices are arranged on a tested bearing seat; the communicating pipe network comprises a total pipeline and a branched pipeline; each testing device is connected with the total pipeline through the corresponding branched pipeline and a tee joint; and the input ends of sensors inside the testing devices are all connected with the input end of the data acquisition device. The invention realizes the elevation measurement of a tested bearing by utilizing the testing mode of the communicating pipe network, enlarges the monitoring range of a system, enhances the testing precision, the economy of the system and conveniently and reliably fixes the testing devices, has convenient testing and high testing precision, meets the requirements for monitoring the elevation of bearings of various traditional large-sized turbo generator sets and has wide application prospect.

The invention discloses an intelligent ventilation monitoring system suitable for the construction period of a tunnel and underground engineering, and a method. The intelligent ventilation monitoringsystem comprises a collecting module and a controller. The collecting module is configured to receive monitoring data of the air environment nearby a ventilator and transmit the data to the controller. The controller is configured to judge whether the dust and harmful gas allowed value is met or not according to the on-site monitoring data and conduct corresponding pre-warning, the rotating speedof the ventilator is adjusted according to pre-warning information, accordingly, the ventilation quantity in the tunnel is changed, and real-time ventilation control is achieved. The full-automatic real-time feedback monitoring system is adopted, real-time dynamic ventilation in the tunnel, an underground engineering tunnel and the undergrounding engineering can be achieved, efficient environmentprotection is achieved, and the difficulties that the timeliness of suction-type ventilation of the tunnel and the underground engineering is poor, and the air supply volume is fixed are solved.

The invention relates to a solar cell module. The solar cell module comprise a plurality of solar cell pieces, a back plate for supporting the solar cell pieces and a junction box positioned on the other side of the back plate, wherein the junction box comprises an anode junction box and a cathode junction box; the anode junction box is connected with the anode of the solar cell module; the cathode junction box is connected with the cathode of the solar cell module; and the anode junction box and the cathode junction box are positioned at the positions of opposite angles of the back plate respectively. In the solar cell module, due to the fact that the anode junction box and the cathode junction box positioned on the other side of the back plate are positioned at the positions of opposite angles of the back plate respectively, when at least two solar cell modules are adjacently connected for use, the anode junction box of each solar cell module can be tightly adjacent to the cathode junction box of the adjacent solar cell module, and the anode junction box and the cathode junction box can be directly connected for use, so that the using amount of connecting cables is greatly reduced, the cost can be reduced, the reliability is improved, the generating capacity is improved, and the solar cell module is beneficial for application.

The invention provides a hybrid power system which comprises a gearbox and a hollow bearing-free motor, wherein the hollow bearing-free motor comprises a stator and a rotor mounted in the stator; the rotor comprises a turntable; the gearbox comprises an end cover and an output shaft; the stator is fixed with the end cover of the gearbox; the turntable is fixed with the output shaft of the gearbox. The hollow bearing-free motor is smartly designed, the stator is fixed with a gearbox shell and a flange at the output shaft end of the gearbox is fixed with the turntable of the rotor, so that the hybrid power system can be refitted for a common vehicle without increasing the axial length, the mounting difficulty problem of the motor is smartly solved, the refitting is convenient and the cost is saved.

The invention discloses a cable and its field constructing method, and it includes an insulating outer layer where lead wires are arranged, where one surface of the insulating outer layer is a plane and a bonding layer is connected with the plane. Its field constructing method includes the steps: coating a curing agent on the planar part of the insulating part and combining the cable with the roof. Its structure is simple, and it solves the difficulty in curing soft material for cable trades and makes the cable appearance beautiful; and it can be fixed on the surfaces of soft, superhard and breakable materials, thus making it simpler to construct and wire and its application rang wide; it is convenient to construct on the spot, thus reducing the labor strength of workers and increasing the operating efficiency; it has a good fixing effect, beneficial to implement and it ahs a wide market prospect.

The invention provides a method for manufacturing a sand coated shell type bronze composite casting valve plate. The method for manufacturing the sand coated shell type bronze composite casting valve plate is composed of following steps that firstly, a precoated sand injection valve plate die cavity is taken, and is kept arm, precoated sand is molded in a curing manner, stripping is carried out, and a sand coated shell type is obtained; secondly, a copper sleeve is fixed to an inner core of the sand coated shell type, and then, mould assembling and vertical clamping are carried out so as to form a casting cavity, wherein the copper sleeve is made of tin bronze, and the tin bronze comprises tin smaller than or equal to 13 percent and phosphorus smaller than or equal to 0.2 percent; thirdly, molten iron is taken, and then the molten iron is poured into the casting cavity to obtain a casting; fourthly, the casting is taken to be cooled, blasting finishing is carried out, and the sand coated shell type bronze composite casting valve plate is obtained. According to the method for manufacturing the sand coated shell type bronze composite casting valve plate, the yield of composite castings can reach more than 95 percent. The technical problem of long-existing in mass production in the prior art is solved.

The invention discloses a power concentration and distribution device for power supply system control equipment of a space craft. The device comprises a plurality of module frameworks, a heat dissipation bottom plate, a bottom plate reinforcing rib, an upper insulating plate, a lower insulating plate and copper bus bars; the bottom of each module framework is connected with the heat dissipation bottom plate and the module frameworks are vertical to the heat dissipation bottom plate; the bottom plate reinforcing rib is fixed on the heat dissipating bottom plate inside the module frameworks; the upper insulating plate is placed on the upper surface of the bottom plate reinforcing rib and the lower insulating plate is placed on the lower surface of the bottom plate reinforcing rib; the copper bus bars are mounted on the bottom plate reinforcing rib, penetrate through the lower insulating plate, the bottom plate reinforcing rib and the upper insulating plate and are fixed; the copper bus bars are vertical to the module frameworks. The power concentration and distribution device for power supply system control equipment of a space craft, provided by the invention, overcomes such problems of a traditional power concentration and electric energy distribution form under the limitation of small size and light weight as poor maintenanceability, heavy device weight, high difficulty in lead fixing and poor heat dissipation effect.

The invention discloses an internet-based video micro-monitoring device. The internet-based video micro-monitoring device comprises a video camera shell and a micro camera. The front end of the videocamera shell is provided with night viewing infrared lamps and illuminating lamps. The upper portion of the video camera shell is provided with a loudspeaking outlet. A loudspeaker is arranged in theposition, corresponding to the loudspeaking outlet, of the interior of the video camera shell. The lower end of the video camera shell is provided with fixed bases. The surfaces of the fixed bases areprovided with external threads. Each fixed base is provided with a first fixing device. The rear end of the video camera shell is provided with a universal bending pipe. The other end of the universal bending pipe is provided with a second fixing device. According to the internet-based video micro-monitoring device provided by the invention, the micro-monitoring device can be fixed to different locations through the first fixing devices and the second fixing device, and the problem that an existing micro-monitoring device is not likely to be fixed is solved. The loudspeaker can achieve the remote reminding and broadcasting functions in the monitoring process. Accordingly, the micro video camera has diversified functions.

The invention discloses a system and a method for a time domain and a rotation angle domain of an in-cylinder pressure signal of an internal combustion engine, a cylinder pressure measurement device and a pulse signal measurement device. The cylinder pressure measurement device and the pulse signal measurement device measure the collected in-cylinder pressure signal and the The pulse signal corresponding to the flywheel ring gear is transmitted to the internal clock acquisition system, and the internal clock acquisition system further transmits the received data to the processor for processing; the precise zero-crossing point of the pulse signal is determined by an interpolation algorithm, and on this basis, the in-cylinder The pressure signal is converted from the time domain to the angle domain; this method effectively avoids the problem of false triggering due to the loss or interference of the encoder signal in the traditional test method, and effectively improves the reliability of the data acquisition process.

The invention discloses a semi-automatic screw type steel pipe, flange and connecting plate grouping device. The semi-automatic screw type steel pipe, flange and connecting plate grouping device comprises an H-shaped base; the top of the H-shaped base is correspondingly provided with an annular seat, a first sliding seat and a second sliding seat; and the first sliding seat and the second slidingseat are both slidably connected with the H-shaped base. The semi-automatic screw type steel pipe, flange and connecting plate grouping device is simple in structure; a steel cable and a slider are used for driving clamping rods to clamp and fix a flange; a steel pipe is placed on a V-shaped base by utilizing a crane; a second screw is rotated to drive two hinging blocks to approach to each otheror leave away from each other by virtue of screw threads which are arranged reversely; the height of the V-shaped base is regulated by virtue of the support and connection effects of connecting rods so that the steel pipe is concentric to the flange and convenience in welding and fixation is realized; subsequently a connecting plate is fixedly installed on a top platform; a third screw is rotatedto drive the top platform to move leftwards and rightwards; the connecting plate is inserted into the steel pipe; afterwards welding is implemented, thus assembling and welding of the flange, the steel pipe and the connecting plate are realized; time and efforts are saved; and relatively high safety is achieved.

The invention discloses a laryngeal mask fixing band with a good fixing effect, belongs to the technical field of clinical medical instruments, and is used for effectively fixing a laryngeal mask. The technical scheme is that the laryngeal mask fixing band is composed of a front fixed surface, a lower fixed surface and a fastening band, wherein the front fixed surface covers cheeks on two sides, an oral cavity, an upper lip and a lower lip; the lower fixed surface covers a lower jaw; the front fixed surface and the lower fixed surface are smoothly and integrally connected; after being respectively connected to the two ends of the front fixed surface, the fastening band encircles a head backwardly to be connected; a laryngeal mask fixing hole is formed in the front fixed surface; the position of the laryngeal mask fixing hole is corresponding to the oral cavity; the diameter of the laryngeal mask fixing hole is matched with the diameter of a laryngeal mask pipe. The laryngeal mask fixing band is simple and practical in structure and good in fastening effect; an effective medical instrument is provided for patients and medical workers; a clinical problem which is not solved for a long time is solved; a blank in laryngeal mask clinical fixation at home and abroad is filled; promotional and use values and obvious social benefits are achieved.

The invention discloses a mobile lighting device and a use method thereof. The mobile lighting device comprises a circular ball lamp and a clamping device, the clamping device includes a clamping head, a fixed lamp holder and a connecting pipe, the connecting pipe is a rotatable flexible pipe, and the clamping head and the fixed lamp holder are connected through the connecting pipe; and the bottom part of the circular ball lamp is provided with a clamping groove, the fixed lamp holder is provided with a spring pressing mechanism and a bumping, and the bumping is clamped in the clamping groove. The use method comprises the following steps of assembling the clamping head, assembling the fixed lamp holder, installing the connecting pipe, fixing the clamping head and using the circular ball lamp. According to the mobile lighting device and the use method thereof, installation is fast, operation is convenient, various occasions are provided, and application and promotion in markets are worthwhile.

The invention relates to the technical field of LEDs, and discloses an LED light source cutting method. The LED light source cutting method comprises the following steps that an LED light source plate is placed on a cutting table, and the LED light source plate is adsorbed to the cutting table through vacuum suction holes, wherein the LED light source plate comprises a plurality of LED light source units which are arranged in a matrix mode, the LED light source plate is provided with a plurality of transverse connecting lines and longitudinal connecting lines which separate the adjacent LED light source units, the side edges of the adjacent LED light source units are connected through the transverse connecting lines or the longitudinal connecting lines, a cutting knife and a polishing grinding wheel which moves synchronously in the same direction with the cutting knife are arranged above the cutting table, the cutting knife and the polishing grinding wheel are arranged at intervals in the transverse direction, and the interval between the cutting knife and the polishing grinding wheel is equal to the transverse width of one or more LED light source units; and driving the cutting knife to cut the LED light source plate along the longitudinal connecting lines, and separating the LED light source units on the two sides of each longitudinal connecting line; the polishing grinding wheel synchronously moves along with the cutting knife in the same direction to polish the side edges of the LED light source units.

The invention relates to an underground diaphragm wall prefabricating method for a built-in capillary tube heat exchanger. The underground diaphragm wall prefabricating method comprises the followingsteps of: in each segment of diaphragm wall, independently constructing diaphragm wall guide walls, drilling on a position near the diaphragm wall between two diaphragm wall guide walls, and graspinga groove between the two diaphragm wall guide walls; fixing a capillary tube and a reinforcement cage, checking the air tightness of capillary tube branch tubes, sealing two ends by a plurality of capillary tube branch tubes in the presence of air, fixing capillary tube main tubes with the reinforcement cage, connecting the plurality of capillary tube branch tubes with a plurality of capillary tube main tubes, placing an integral structure of the reinforcement cage and the plurality of capillary tube branch tubes in the groove along external diaphragm wall guide walls, and pouring concrete into the groove to fix the reinforcement cage; connecting the capillary tube main tubes, and connecting the capillary tube main tubes with a water collection manifold (water knockout drum) branch tubes;and arranging a crown beam above a reinforcement structure, pouring the concrete to enable the concrete to cover the crown beam and the capillary tube main tubes, and forming a plurality of diaphragmwalls into a whole. According to the underground diaphragm wall prefabricating method, quick construction of the underground diaphragm wall of the built-in capillary tube heat exchanger is realized.

The invention discloses a test piece load test assembly. The test piece load test assembly comprises a connector assembly, a load sensor, a curved load transfer frame, a transmission assembly and an actuator cylinder, wherein one end of the connector assembly is connected with a test piece; one side of the load sensor is connected with the other end of the connector assembly; one end of the curvedload transfer frame is connected with the other side of the load sensor, and the curved load transfer frame comprises a bent section; the transmission assembly comprises a first load transfer wire rope end and a second load transfer wire rope end, and the first load transfer wire rope end is connected with the other end of the curved load transfer frame; the loading end of the actuator cylinder is connected with the second load transfer wire rope end. By the arrangement of the curved load transfer frame, the test piece load test assembly can bypass an interference through the bent section tomaintain the loading direction.

The invention discloses a power concentration and distribution device for power supply system control equipment of a space craft. The device comprises a plurality of module frameworks, a heat dissipation bottom plate, a bottom plate reinforcing rib, an upper insulating plate, a lower insulating plate and copper bus bars; the bottom of each module framework is connected with the heat dissipation bottom plate and the module frameworks are vertical to the heat dissipation bottom plate; the bottom plate reinforcing rib is fixed on the heat dissipating bottom plate inside the module frameworks; the upper insulating plate is placed on the upper surface of the bottom plate reinforcing rib and the lower insulating plate is placed on the lower surface of the bottom plate reinforcing rib; the copper bus bars are mounted on the bottom plate reinforcing rib, penetrate through the lower insulating plate, the bottom plate reinforcing rib and the upper insulating plate and are fixed; the copper bus bars are vertical to the module frameworks. The power concentration and distribution device for power supply system control equipment of a space craft, provided by the invention, overcomes such problems of a traditional power concentration and electric energy distribution form under the limitation of small size and light weight as poor maintenanceability, heavy device weight, high difficulty in lead fixing and poor heat dissipation effect.

The invention provides an aluminum mold process stair railing embedded part mounting device and a mounting method thereof, and belongs to the technical field of constructional engineering, the device comprises a stair step aluminum mold, a stair railing base embedded mounting device and a stair railing base embedded part, and the stair step aluminum mold is provided with an opening; the stair railing base embedded installation device is arranged above the stair step aluminum mold and penetrates through the open hole, the stair railing base embedded part is arranged at the bottom of the stair step aluminum mold, and the stair railing base embedded installation device and the stair railing base embedded part are detachably arranged. On the basis of an existing technology of installing a base embedded part before pouring of a stair railing base, the advantage of good appearance quality of concrete outer surface forming of the technology is reserved. And components can be repeatedly and circularly used, so that the consumption of manpower, materials and machines is reduced, the construction procedures are reduced, the cost is reduced, the economic benefits are further improved, and the device is wide in application range.

The invention relates to a comprehensive reinforcing structure of an active open-spandrel arch bridge. The comprehensive reinforcing structure comprises a pressure grouting treatment arch ring pointing and crack structure and a finalization operation platform, the pressure grouting treatment arch ring pointing and crack structure comprises an arc-shaped pressing plate face plate, a first steel plate with bolt holes, a transverse steel pipe and a vertical steel pipe. The arc-shaped pressing plate face plate is fixed to an arch ring of a web arch through a second anchor bolt. The finalization operation platform comprises a third formwork, a second steel plate with a bolt hole, a transverse short rod, a horizontal transverse rod, a vertical rod, a connecting disc, a horizontal longitudinal rod and a buckling head, the second steel plate with the bolt hole is fixed to the web arch transverse wall through a fourth anchor bolt, and the buckling head is arranged on the connecting disc. The structure has the beneficial effects that the problem of comprehensive reinforcement construction of the open-spandrel arch bridge in active service under limited construction conditions can be solved, the structure is suitable for various working conditions during construction, and the structure has a wide application range.

The invention discloses an LED lamp with a lampshade, and belongs to the technical field of LED lamps. According to the technical key points, the LED lamp comprises a substrate; a light source is arranged on the substrate; a drive power source box is arranged in the middle of the substrate; the light source is distributed on the periphery of the drive power source box; an optical diffusion cover is arranged at the position, on the periphery of the light source, of the substrate; and the optical diffusion cover and the drive power source box are connected through a connecting part. The LED lampwith the lampshade is compact in structure, convenient to mount and good in use effect and is used for indoor and outdoor illumination.

The invention provides a method for detecting wave aberration of a high numerical aperture oil immersion lens. An outgoing beam emitted by a light source converges on a light bar at the focal point of a collimating lens. After the beam is divided by a beam splitting prism, the beams are emitted along the collimating lens in parallel and projected onto a standard flat crystal. The incidence plane of the standard flat crystal is taken as the reference plane, a part of the light is reflected along the reference plane, and the other part of the light is transmitted through the reference plane and is focused on the focal point through a measured lens and medium oil. The light beam enters a super-hemispherical reflector in the point incidence direction of the focal point and returned, finally, the two light beams are reflected through the beam splitting prism, two bright holes are formed in the exit pupil position, by adjusting an air wedge between the standard flat crystal and the measured lens, images of the two small holes are overlapped, and finally through the CCD, the images at the small holes are converted into electrical signals. The super-hemispherical reflector is made of glass, the vector height of the super-hemispherical reflector is larger than the radius R of the super-hemispherical reflector, and the super-hemispherical excircle surface is plated with a total reflection film.

The invention discloses a cushioning inflatable bag suspension plate comprising a carrier plate. A plurality of first-type U-shaped notches are arranged on the lower half part of the carrier plate inparallel, openings of the U-shaped structures of the first-type U-shaped notches are all downward, and an elastic clamping plate is formed in each U-shaped structure; and a second-type U-shaped notchand a third-type U-shaped notch are symmetrically formed on the upper half part of the carrier plate left and right, openings of the U-shaped structures of the second-type U-shaped notch and the third-type U-shaped notch outwards face the two sides of the carrier plate, and an arm plate is formed in each U-shaped structure of the second-type U-shaped notch and the third-type U-shaped notch. The cushioning inflatable bag suspension plate solves the problem that on the operation site, as the size of a cushioning inflatable bag is large, cargoes are at high positions, consequently the inflatablebag cannot be independently erected and fixed, and inflation operation is difficult.

The invention is suitable for the field of power boxes, and provides a multifunctional power box, which comprises a box body, a guide plate, a transverse frame and a support connecting unit, the guide plates are fixed to the two sides in the box body, the side faces of the guide plates are attached to the side walls of the box body, the guide plates are vertically arranged, the supporting and connecting units are slidably arranged on the guide plates, and the transverse frame is fixed between the supporting and connecting units corresponding to the guide plates on the two sides; telescopic pieces facing the two sides are arranged in the transverse frame and the supporting and connecting unit, a control button is arranged on the transverse frame and used for driving the telescopic pieces on the two sides to contract, and a plurality of locking structures are arranged on the side wall of the box body. The transverse frame has the beneficial effects that the transverse frame is adjusted and fixed by adopting an ingenious and simple structure, so that a user can operate the transverse frame with one hand, and the actual use effect is good.

The invention discloses a leveling device for a wind measuring instrument on a large cable of a large-span suspension bridge. The supporting steel plate is fixed on the crossbeam of the inspection road, and a platform panel for fixing the supporting rod of the wind measuring instrument is arranged above it. The supporting steel plate and the platform There is a controller and three leveling parts with the same structure between the panels; the controller receives the inclination data sent by the sensor, calculates the adjustment range of each servo motor according to the current inclination situation, and sends the adjustment command to the corresponding programmable Logic controller; the programmable logic controller turns on the servo motor, and the output end of the servo motor reducer is vertically provided with a ball screw; the matching screw nut is fixedly connected to the platform panel to drive the platform panel to lift and level. The invention can detect the inclination of the wind measuring instrument in real time, automatically adjust the angle of the instrument in time according to the inclination degree of the instrument, keep the instrument completely level, greatly reduce the workload of manual leveling, and improve the accuracy of wind measurement data.

The invention provides a preparation method for an aluminum bronze composite casting valve plate. The preparation method comprises the following steps that 1 precoated sand is fetched and injected into a valve plate die cavity, heat preservation is conducted so that the precoated sand is solidified and formed, drawing is conducted, and a shell mould of the precoated sand is acquired; 2 a copper bush is fixed to an inner core of the shell mould of the precoated sand, then mould assembling is conducted, and the copper bush is vertically clamped to form a pouring cavity; the component of the copper bush is aluminum bronze; 3 iron liquid is acquired, then the iron liquid is poured into the pouring cavity, and a casting piece is acquired; 4 the casting piece is fetched and cooled, shot blasting and finishing are conducted, and a precoated sand shell-shaped composite casting valve plate is acquired. The yield of the composite casting piece can reach over 96% through the adoption of the preparation technology of the aluminum bronze composite casting valve plate, and the preparation technology of the aluminum bronze composite casting valve plate solves the long-existing technical problem puzzling the mass production in the prior art.

A rapid clamping device for laser tin soldering of an electric ignition head comprises a base assembly, an electric ignition head pressurizing plate and a bridge wire pressurizing block. Two columns and N rows of electric ignition head limiting fixing grooves are arrayed in the base assembly, and the electric ignition head limiting fixing grooves are used for containing electric ignition head forked wires. A bridge wire pulling and covering groove is machined in the base assembly in the length direction of the cuboid and used for containing a bridge wire. Bridge wire fixing mechanisms are arranged at the two ends of the base assembly correspondingly and used for fixing the two ends of the bridge wire. The electric ignition head forked wires are pressed and fixed by the electric ignition head pressurizing plate through a plurality of electric ignition head pressurizing claws, and the bridge wire is pressed and fixed by the bridge wire pressurizing block through a plurality of bridge wire pressurizing claws; the pressurizing claws of the electric ignition head pressurizing plate and the bridge wire pressurizing claws of the bridge wire pressurizing block are arranged at intervals; and the base assembly and the electric ignition head pressurizing plate are connected and fixed through magnets, and the electric ignition head pressurizing plate and the bridge wire pressurizing blockare connected and fixed through magnets. Rapid clamping of laser tin soldering can be achieved by the rapid clamping device for laser tin soldering of the electric ignition head, and the positioning precision is high.

The embodiment of the invention discloses an electro-hydraulic control pressure shutoff system used for a hydraulic support vertical column. The electro-hydraulic control pressure shutoff system comprises a liquid inlet main pipeline, a liquid returning main pipeline, a pressurizer, two hydraulic control one-way valves, two hydraulic control two-position three-way reversing valves and two electromagnetic reversing valves. The liquid inlet main pipeline comprises a first branch and a second branch; the liquid returning main pipeline comprises a third branch and a fourth branch; the first branch is connected with inlets of the two electromagnetic reversing valves; emittings of the two electromagnetic reversing valves are connected with control openings of the two hydraulic control two-position three-way reversing valves; oil returning openings of the two electromagnetic reversing valves are connected with the third branch; the second branch is connected with inlets of the two hydraulic control two-position three-way reversing valves; oil returning openings of the two hydraulic control two-position three-way reversing valves are connected with the fourth branch; and an emitting of the pressurizer used for being connected with an annular cavity. The embodiment of the invention discloses an electro-hydraulic control pressure shutoff method used for the hydraulic support vertical column. By utilizing the electro-hydraulic control pressure shutoff system and method used for the hydraulic support vertical column, the disassembling efficiency of a middle cylinder guide sleeve can be improved.

The invention relates to the technical field of fuel injectors, in particular to a fuel injector fixing structure. The fuel injector fixing structure comprises a pressing block which one end is abutted against an installing surface on an fuel injector and a pressing bolt with one end abutting against the upper surface of the middle of the pressing block and the other end is in threaded connectionwith a cylinder head, and further comprises a supporting element in threaded connection with the cylinder head, wherein the top of the supporting element abuts against the bottom of the other end of the pressing block. According to the fuel injector fixing structure, the problem that the fuel injector is difficult to fix due to structural change in a design and development process of an engine issolved, the supporting surface of the fuel injector pressing block is raised, the compactness design of a cylinder head cover is guaranteed, and the weight of the cylinder head is effectively reduced.

The invention relates to a positioning device for pre-embedded steel plates and a construction method thereof. It is used to fix the steel plate at a concrete structure to be formed, and one side of the steel plate is fixed with several fixing ribs at intervals. The positioning device includes: a base; A telescopic piece that is vertically fixed on the base and can be adjusted up and down; and a clamp that is fixedly installed on the side of the telescopic piece and matches the steel plate, the steel plate is clamped by the clamp, and the fixing rib faces the side away from the telescopic piece, and then Adjust the telescopic member to drive the steel plate up to the concrete structure to be formed. The invention effectively solves the problem of difficult fixing of the steel plate, without welding the steel plate to the steel bars in the concrete structure, the positioning of the steel plate can be completed through the positioning device, and the deviation of the steel plate can be avoided during concrete pouring, ensuring the pre-positioning of the steel plate. The buried accuracy lays a good foundation for subsequent construction.