83results about How to "Reliable adjustment" patented technology

The invention provides a TEC control circuit for pump laser temperature control and a control method, and relates to the technical field of semiconductor cooler control. The control circuit comprises a temperature acquisition circuit, a differential amplification circuit, a PID (Proportion Integration Differentiation) control circuit, a TEC control signal generating circuit and a TEC driving circuit, the temperature acquisition circuit, the differential amplification circuit, the PID control circuit, the TEC control signal generating circuit and the TEC driving circuit are electrically connected in sequence, and the temperature acquisition circuit and the TEC driving circuit are respectively and electrically connected with the pump laser. According to the invention, the problem that the cost cannot be saved and the efficient, stable, reliable and accurate temperature change control cannot be carried out on the pump laser due to the limitation of several common modes for controlling the TEC in the practical application at present is solved.

The present invention relates to the technical field of steel structure construction, and specifically to a support system for the installation of a tree-shaped column structure, comprising a main truss, a sliding device and a fixing device, wherein the main truss is erected on two tree-shaped columns; a sliding device is provided on the tree-shaped column, and the main truss abuts against the sliding device; a fixing device is arranged on one side of the main truss, one end of which is fixed on the main truss, and the other end of which is fixed on the branch rod of the tree-shaped column. The sliding device is placed on the tree-shaped column, and then the main truss is hoisted and placed on two adjacent tree-shaped columns to slide and adjust the position of the main truss, and then the main truss is fixed by the fixing device. The connecting truss segment is hoisted and temporarily placed on the support system, and workers can operate and construct on the main truss, and weld the connecting truss to the branch rod of the tree-shaped column. When the connecting truss is fixed, the fixing device is released, and the main truss is slid to the top of the next tree-shaped column, and the installation of the remaining connecting truss segments is completed in sequence in the above manner.

The invention relates to the technical field of unmanned aerial vehicle launchers, in particular to a marine unmanned aerial vehicle launcher. The marine unmanned aerial vehicle launcher comprises a supporting frame, a bottom bracket, a telescopic piece, an angle adjusting assembly, a lifting frame, a front supporting assembly and a rear supporting assembly. The two ends of the telescopic pieces are rotationally connected with the supporting frame and the bottom bracket correspondingly, and the multiple telescopic pieces are arranged at intervals; the angle adjusting assembly is arranged on the bottom bracket and is in transmission connection with the lifting frame; the front supporting assembly and the rear supporting assembly are arranged on the lifting frame at intervals in the length direction of the lifting frame, and the front supporting assembly and the rear supporting assembly are both used for being connected with the unmanned aerial vehicle. The front supporting assembly locks or releases the lug rods through the lock catches, so that the levelness of the bottom bracket can be adjusted by adjusting the lengths of the multiple telescopic pieces, it is guaranteed that the levelness of the bottom bracket is within the set range, and therefore the launching accuracy of the unmanned aerial vehicle is guaranteed.

The present invention relates to a pressurizing device and a pressurizing method in a chip mounting process, comprising a lever, on which a rotating shaft is horizontally mounted, the rear end of the lever is hoisted by a steel wire rope, the steel wire rope is connected to a load after passing around a pulley, a pressure head assembly is mounted on the bottom surface of the front end of the lever, and a pressure block at the bottom end of the pressure head assembly applies a vertical downward force to a chip below, thereby forming a chip pressurizing mechanism; a cam is arranged above the lever between the rotating shaft and the steel wire rope, and as the cam rotates, the cam applies a downward force to a lever below to release the downward pressure of the pressure head assembly on the chip; a downward, continuous and stable pressing force is applied to the chip through the steel wire rope and the lever by the load, and the cam rotates to slowly apply a force to the lever to offset the load to release the pressing of the chip, thereby effectively ensuring the continuous, uniform and stable chip mounting, and being suitable for the synchronous mounting of multiple rows of chips, greatly facilitating the use in chip mounting, and particularly suitable for the mounting of chips in different occasions such as heating.

The utility model provides an air speed adjusting valve and an air-speed-adjustable air duct, belongs to the technical field of winnowing machines, and solves the problems that an air speed adjusting mechanism of an existing winnowing machine is labor-consuming, easy to block, small in adjusting range, incapable of quantizing adjusting quantity and capable of causing turning plate deviation due to long-time vibration. The wind speed regulating valve comprises a driving assembly and a wind speed regulating assembly, the turning plate is in transmission connection with the driving assembly, the driving assembly drives the turning plate to rotate in the air duct, and the air speed is adjusted by changing the opening area of the air duct nozzle. According to the technical scheme, a combination mode of combining lead screw transmission and a connecting rod mechanism is provided, so that the wind speed adjusting mechanism can be conveniently and reliably adjusted, and the operation reliability of the winnowing machine is improved.

The utility model discloses an insulating flame-retardant fast charging cable structure, which comprises a cable body, a fast charging head, a fixed frame, a first telescopic moving frame and a second telescopic moving frame, one end of the cable body is connected with a charging pile, and the fixed frame is fixedly arranged on the charging pile. A first telescopic frame is installed among one sides of the tops of the fixed frame, the first telescopic moving frame and the second telescopic moving frame, an electric telescopic rod is rotationally installed on the other side of the top of the fixed frame, and the telescopic end of the electric telescopic rod is connected with the first telescopic frame. A second telescopic frame is mounted among the lower parts of one sides of the fixed frame, the first telescopic moving frame and the second telescopic moving frame; the insulating flame-retardant fast-charging cable structure is provided with the telescopic adjusting structure, and the telescopic adjusting structure can be used for carrying the cable in a suspended manner, so that the cable can be safely, stably and effectively charged without being in contact with the ground, the cable is effectively protected, and the service life of the cable is prolonged.

The present invention relates to the field of hydropower station engineering technology, in particular to a hydropower station dam concrete vibrating robot, which comprises a driving module, a vibrating rod position adjustment module, a vibrating construction combination control module and a vibrating rod, wherein the vibrating rod position adjustment module is arranged on the driving module, the vibrating construction combination control module is arranged on the vibrating rod position adjustment module, and the vibrating rod is arranged at the front end of the vibrating construction combination control module. The hydropower station dam concrete vibrating robot of the present invention has a delicate structure, does not require personnel to drive in the robot, has standardized and automated construction, and can be applied to concrete vibration construction of various warehouse surfaces at the hydropower station dam concrete site, thereby effectively and significantly reducing the labor intensity, improving the efficiency and quality of the vibration construction, and having a low operating cost, which is conducive to large-scale use.

The invention provides a pore analysis method and a pore analysis device. The method comprises a solid-liquid wetting angle adjusting step, a pressure applying step and a porosity determining step. In the solid-liquid wetting angle adjusting step, a solid sample is immersed in a liquid medium, the wetting angle between the liquid medium and the solid sample is increased by applying external stimulation to the solid sample and / or the liquid medium, and the value of a parameter used for indicating the space occupied by the liquid medium is obtained in the state that the external stimulation is applied to serve as a first value L1. In the pressure application step, pressure is applied to the liquid medium in a state in which the external stimulus is applied, and the value of the parameter is acquired as a second value L2 in a state in which the pressure is applied to the liquid medium. In the porosity determination step, the porosity of the solid sample is determined based on the volume V of the solid sample and the comparison result of the first value L1 and the second value L2.

The present invention belongs to the technical field of construction machinery and equipment, and relates to a movable curtain wall wall-riding hoisting equipment, comprising a crossbeam, a fixed pulley is rotatably arranged at the front end of the crossbeam, a front vertical beam is fixed to the bottom surface of the crossbeam corresponding to one end of the fixed pulley, and a rear vertical beam with adjustable position is also arranged on the crossbeam; a winch device is installed at the top of the rear vertical beam, and the wire rope drawn out of the winch device extends vertically downward after the fixed pulley is changed, a crossbeam walking device is fixed on the crossbeam corresponding to the front vertical beam and the rear vertical beam, the lower parts of the front vertical beam and the rear vertical beam are respectively fixedly connected to the sleeve frame, and a wall-supporting wheel is rotatably arranged at both ends of the sleeve frame; a top wall device with adjustable position is also arranged at the rear of the crossbeam, and the top wall device is used to adjust the position of the rear vertical beam. The hoisting equipment effectively solves the problem that the existing glass roof cannot be installed with hoisting equipment, and can improve work efficiency without damaging the glass curtain wall.

The invention relates to a method and device for adjusting the temperature of a furnace tube outlet of a cracking furnace and electronic equipment. The method comprises the following steps: for each first furnace tube group in a plurality of first furnace tube groups, determining furnace tube outlet average temperature of the first furnace tube group; calculating an average value of furnace tube outlet average temperatures of the plurality of first furnace tube groups; determining the target temperature of the furnace tube outlet of the cracking furnace according to the average value of the average temperatures of the furnace tube outlets of the plurality of first furnace tube groups, the measured values of all the wall-attached thermocouples in the cracking furnace and the measured values of all the plug-in thermocouples in the cracking furnace; and adjusting the fuel gas amount of the cracking furnace to enable the furnace tube outlet temperature of the cracking furnace to reach the target temperature. Therefore, the outlet temperature of the furnace tube of the cracking furnace can be reliably and accurately adjusted. Moreover, measured values of two types of temperature sensors, namely the wall-attached thermocouple and the plug-in thermocouple, are considered in the adjusting process, so that the accuracy and the reliability in the adjusting process are further improved, and the stability of the cracking furnace during operation is ensured.

The pesticide spraying device comprises a pesticide barrel, two first rotating rods are symmetrically and rotatably connected to one side of the pesticide barrel, a second rotating rod is rotatably connected to one end of each first rotating rod, and guide pipes are fixedly installed on the opposite sides of the first rotating rods and the second rotating rods; pesticide spraying nozzles are installed on the surface of the guide pipe at equal intervals, two adjusting rods are symmetrically and rotationally connected to one side of the pesticide barrel, the two adjusting rods are connected with the two first rotating rods correspondingly, a base is installed at the bottom of the pesticide barrel, and four moving wheels are installed at the bottom of the base; the pesticide spraying device has a double-side large-range spraying function and can be effectively folded, stretched and adjusted, so that the spraying range of the pesticide spraying device is effectively expanded, the pesticide spraying work efficiency is effectively improved, and the pesticide spraying work intensity is reduced.

The utility model discloses a fixing device for a fine hole electric discharge machine, which comprises a box body and a fine hole electric discharge machine body, a mounting block capable of horizontally moving and adjusting is arranged at the top in the box body, a T-shaped transverse groove is formed in the top in the box body, a threaded shaft is rotatably connected in the T-shaped transverse groove, and the threaded shaft is fixedly connected with the box body. The surface of the threaded shaft is in threaded connection with a T-shaped moving block slidably mounted in the T-shaped transverse groove, the mounting block is fixedly connected to the bottom of the T-shaped moving block, an arc groove is formed in the middle of the lower portion of the mounting block, a rotating ring capable of being rotationally adjusted is mounted in the arc groove, and a U-shaped fixing plate is fixedly mounted on the surface of the rotating ring. The pore discharge machine body is fixedly mounted at the bottom of the U-shaped fixing plate; the fixing device for the fine-hole electric discharge machine has an angle adjusting function, and can adjust the angle of the fine-hole electric discharge machine so as to carry out effective machining operation on a workpiece with a multi-surface structure, so that the machining practicability of the fine-hole electric discharge machine is effectively improved.

The utility model relates to the technical field of electrical cabinets, and discloses a mounting base structure of an electrical cabinet, which comprises a base body and an electrical cabinet body, the electrical cabinet body is fixedly mounted at the top of the base body, and a round convex groove is formed in the bottom of the base body. Two storage slots are formed between the middles of the four sides of the base body and the bottom of the electrical cabinet body, insertion rods extending into the circular convex groove are movably inserted into the eight storage slots, supporting blocks are fixedly connected to the bottoms of the insertion rods, four sliding grooves are symmetrically formed in the center of the top of the circular convex groove, and the supporting blocks are fixedly connected to the bottoms of the sliding grooves. The interiors of the four sliding grooves are rotationally connected with threaded shafts correspondingly, and adjusting rods are connected between the surfaces of the four threaded shafts and the lower portions of the four inserting rods correspondingly. The mounting base structure of the electrical cabinet has a lifting adjusting function, so that the electrical cabinet can be effectively lifted when water is accumulated suddenly, and electrical components in the electrical cabinet are effectively protected.

The utility model provides a kind of rotating equipment turning gear, it is related to turning tool technical field, including handle, fixed jaw piece and movable jaw piece, the fixed jaw piece is connected in the upper end of handle, the movable jaw piece is hinged in the rear side of fixed jaw piece, and worm wheel is connected on the hinged shaft of movable jaw piece, first shaft seat is equipped on the fixed jaw piece in the position below worm wheel, and the inside of first shaft seat is rotatably equipped with the worm that is compatible with worm wheel;The lower end of handle is equipped with rotating unit, and rotating unit is linked with worm and rotates;The utility model uses the clamping mode of fixed jaw piece cooperation movable jaw piece, the bolt of one coupling on the lock nut bolt on movable jaw piece is clamped, the end of fixed jaw piece is inserted into the bolt of another angle on coupling in clamping groove, and turning handle can be carried out turning, because it is supported by coupling bolt, it will not harm the body of coupling, and two fulcrum contact is more reliable, it is not easy to loosen when operating, more safe.

The invention discloses an unmanned aerial vehicle for mounting a falling protector and a control method of the unmanned aerial vehicle. The unmanned aerial vehicle comprises a vehicle body, a rotor wing assembly, a falling protector clamping and mounting assembly, a telescopic supporting assembly and a monitoring mechanism. The monitoring mechanism is used for monitoring whether the unmanned aerial vehicle reaches a falling protector mounting area or not, and when the unmanned aerial vehicle reaches the falling protector mounting area, the falling protector clamping and mounting assembly is used for conducting linkage control with the rotor wing assembly and the telescopic supporting assembly, so that the rotor wing assembly shrinks in the direction close to the vehicle body; the falling protector clamping and mounting assembly is used for mounting a pre-clamped falling protector to a preset mounting point according to a preset mode; and after the monitoring mechanism monitors that the unmanned aerial vehicle leaves the falling protector mounting area, the falling protector clamping and mounting assembly is used for performing linkage control with the rotor wing assembly and the telescopic supporting assembly, so that the falling protector clamping and mounting assembly, the telescopic supporting assembly and the rotor wing assembly are reset. The unmanned aerial vehicle can effectively prevent the unmanned aerial vehicle from colliding with the high-voltage transmission tower when the falling protector is hung.

The utility model discloses a bridge engineering sandstone firmness performance test device which comprises a base, a soaking barrel is installed at the top of the base, a cleaning barrel groove is formed in the top of the base, a cleaning barrel is arranged in the cleaning barrel groove, two first connecting shafts are symmetrically installed on the surface of the cleaning barrel, and two second connecting shafts are symmetrically installed on the surface of the cleaning barrel. The two first connecting shafts are rotationally connected with the side wall of the cleaning barrel groove, a turnover adjusting component in transmission connection with one first connecting shaft is installed in the base, a drying groove is formed in the top of the base, a rotating basket is rotationally installed in the drying groove, and a second motor connected with the rotating basket is installed in the base. An electric heating drying wire is installed on the lower portion of the drying groove, and an electric blowing fan is installed at the bottom of the drying groove. The sandstone firmness test device has pretreatment discharging and mixed material drying functions, can conveniently and quickly discharge pretreated and cleaned sandstone, and can mix the dried sandstone to facilitate uniform drying of the sandstone.

The invention relates to the technical field of power distribution cabinets, and discloses a power distribution cabinet which comprises a cabinet body and a cabinet door, the cabinet body comprises a base, an extensible fixed inverted-U-shaped cabinet plate, an extensible and liftable movable inverted-U-shaped cabinet plate and an extensible cover plate, the fixed inverted-U-shaped cabinet plate is fixedly installed on the top of the base, and the movable inverted-U-shaped cabinet plate is fixedly installed on the top of the base. The movable inverted-U-shaped cabinet plate is installed in the middle of the fixed inverted-U-shaped cabinet plate and can be adjusted in a lifting mode, the cover plate is fixedly installed on the top of the movable inverted-U-shaped cabinet plate, the lower portion of one end of the fixed inverted-U-shaped cabinet plate and the upper portion of one end of the movable inverted-U-shaped cabinet plate are each provided with two hinges, and the cabinet door is installed among the four hinges. The cabinet door can move up and down for expansion to be matched with the adjustment of the cabinet body for sealing, and the up-and-down movement expansion of the cabinet door and the up-and-down movement expansion matched with the cabinet body are synchronously adjusted in a linkage manner; the electric power distribution cabinet has an internal installation space expansion function, and can perform up-and-down and front-and-back space expansion according to actual use requirements.

This invention relates to the field of medical high-fidelity training model technology, and discloses a multi-vascular network biomimetic hemostasis model and method for junctional wounds. The model includes a biomimetic model, a blood bank system, a control system, and a temperature control unit. A biomimetic multi-vascular network is embedded in the junction area of ​​the biomimetic model, and a biomimetic wound opening is provided at the corresponding position of the biomimetic multi-vascular network. The input end of the biomimetic multi-vascular network is connected to the output end of the blood bank system, and the output end of the biomimetic multi-vascular network is located inside the biomimetic wound opening. The temperature control unit is located at the input end of the biomimetic multi-vascular network. A pressure sensor is provided in the biomimetic wound cavity wall of the biomimetic wound opening, and hemostatic material is filled inside the biomimetic wound opening, with the hemostatic material in contact with the pressure sensor. The control terminal of the control system is electrically connected to the blood bank system, the temperature control unit, and the pressure sensor. This invention can realistically simulate the bleeding process of penetrating and blind-tube injuries in the junctional wound of the simulation model, facilitating simulation training.

The utility model discloses an inclined leg type lifting table, belongs to the field of lifting tables, solves the problem that the service life of a gear is shortened due to the fact that the abrasion degree of the gear is easily increased when the same gear box is shared, and adopts the technical scheme that the inclined leg type lifting table mainly comprises table legs, a lifting stand column, a table plate and a power source for driving the lifting stand column to stretch out and draw back, the lifting stand column is obliquely arranged between the table legs and the table board, a transverse stand column for controlling the table board to move horizontally is fixed to the top of the lifting stand column, the lifting stand column comprises a first transmission assembly and a first gearbox, the transverse stand column comprises a second transmission assembly and a second gearbox, and the transmission rod is in transmission connection with the first gearbox and the second gearbox at the same time. In the process that the lifting stand column drives the table board to lift, the transverse stand column drives the table board to horizontally move so as to compensate horizontal displacement caused by lifting of the table board along with the lifting stand column. The gear boxes of the lifting stand column and the transverse stand column are independently arranged, so that the possibility that the output shaft is damaged is reduced.

The invention discloses a sliding type transport vehicle with a liftable chassis and a control method thereof.The sliding type transport vehicle is characterized in that the front side and the rear side of a lower sliding assembly are each provided with an adjusting device, the adjusting devices drive rotating shafts through built-in worm and gear mechanisms, and then wheel type assemblies located on the outer side of the lower sliding assembly are driven to rotate as a whole; the structure is combined with a corresponding control method, the wheels can be separated from the ground under supporting of the supporting legs, then the wheels are adjusted to the specific angle according to the working conditions, and finally switching of multiple walking modes is achieved. By actively adjusting the ground clearance of the chassis and the posture of the vehicle body, the problems of leg type walking and wheel type assembly bottom supporting are solved, and the structure is simple and convenient. And the trafficability, the stability and the energy efficiency under the rugged terrain are obviously improved.

This utility model discloses a bending and forming device for a high-speed rail seat frame, which includes a device base. A T-shaped fixed support is fixedly installed at one end of the top of the device base. A horizontally elongated groove is formed on the top of the device base. An adjustable seat that can move horizontally is installed inside the horizontally elongated groove. A T-shaped adjustable support is fixedly installed at one end of the top of the adjustable seat. An n-shaped frame is fixedly installed on the top of the T-shaped adjustable support. An electric telescopic rod is installed in the middle of the n-shaped frame. A pressing block is fixedly installed at the telescopic end of the electric telescopic rod located inside the n-shaped frame. A rotatable bending block is installed at one end of the upper part of the T-shaped adjustable support. A hydraulic telescopic cylinder is installed between the bottom of the bending block and the top of the adjustable seat. This bending and forming device has an adjustment function, which can stably and effectively place and bend aluminum alloy tubes of different lengths, thereby effectively improving the practicality of the bending and forming device.

The utility model relates to the field of machining discloses an auxiliary supporting device for thin -walled work piece processing, including device body, the device body one side screw thread has the adjusting bolt, the device body inside sliding has the axle body. In the utility model, the device provides reliable support and flexible adjustment for thin -walled work piece processing, effectively guarantees the processing quality, and it is directly contacted with the work piece through the axle body, cooperates the front end steel ball bolt locking, can stabilize the position of the axle, prevents the work piece processing and appears the deformation of shaking, the position of axle can be flexibly adjusted, can be adapted to the work piece of different specifications size, simultaneously, through the knob drive axle sliding, easy operation, adjusting bolt and body screw thread cooperation, can accurate adjustment push out, ensure that work piece corner and device R part closely fit, improve the adjustment accuracy, the whole design gives consideration to stability and flexibility, can satisfy the processing demand of diversification, provides powerful support for thin -walled work piece processing, helps to improve the processing efficiency and finished product quality.

The invention relates to a mine air volume adjusting method and system, a terminal and a readable storage medium, and belongs to the technical field of mine ventilation. According to the air volume value Q, a pre-generated air volume characteristic curve Map table of the to-be-adjusted air window is called; determining an air window angle value A corresponding to the set air volume value Q according to the Map table; the air window angle is controlled and adjusted to A; a current actual air volume value Qr is obtained; the difference value between the current actual air volume value Qr and the set air volume value Q is obtained; whether the difference absolute value is not larger than the air volume error value Qw or not is judged; and if not, finely adjusting the angle of the air window according to a preset angle adjusting rule. The air volume adjusting device has the beneficial effect that the air volume can be rapidly, timely, reliably and stably adjusted.

The utility model discloses an auxiliary mounting rack for external parts of a box body, which comprises a moving trolley on which a processing platform is arranged; the positioning device is arranged on the processing platform, the positioning device is used for clamping and fixing the parts, and a regulation and control device for driving the positioning device to move in the left-right direction, the up-down direction and the front-back direction of the processing platform is arranged on the processing platform; the positioning device comprises an annular ring body, a plurality of positioning frames annularly arranged on the ring body at equal intervals and a driving device for driving the positioning frames to move in the direction close to and away from the center of the ring body. The positioning frame comprises U-shaped locking frames, a part is arranged in the center of the ring body, the driving device drives the multiple locking frames to move towards the side away from the part, and the multiple locking frames are made to coincide with one another to clamp and fix the part. The device is convenient to operate and stable and reliable in adjustment, and achieves the effects that parts can be fixed and driven to move and get close to the circular cold box, and it is ensured that the parts are convenient to install.

The invention discloses a quasi-real friction test bench of a radial plunger tilt cylinder hydraulic motor friction pair, which comprises a hydraulic loading system and a rack, and also comprises an eccentric shaft and a first servo motor which are arranged on the rack, and the eccentric shaft comprises an upper end fixing shaft and a lower end fixing shaft which are connected to the rack through respective rolling bearings; the lower end fixing shaft is coaxially connected with the first servo motor, the upper end fixing shaft and the lower end fixing shaft are coaxial, and the eccentric shaft further comprises an adjustable eccentric shaft with the distance between the axis and the axis of the fixing shaft adjustable. Two tilt cylinders needing to be subjected to a real friction test are symmetrically arranged on the rack; the device further comprises a micro swing angle generating mechanism used for simulating reciprocating swing friction between a radial plunger swing cylinder hydraulic motor crank and the swing cylinder. The quasi-real friction test bed is high in pertinence, can perform a quasi-real friction test on the radial plunger tilt cylinder hydraulic motor friction pair for a long time, and can obtain related data of friction performance of the radial plunger tilt cylinder hydraulic motor friction pair under different working conditions.

The invention belongs to an automobile chassis height adjusting structure in the technical field of automobiles. The second hydraulic chamber (2) is internally provided with a lifting moving block (4), the upper part of the lifting moving block (4) is connected with a shock absorber (5), the second hydraulic chamber (2) is communicated with an adjusting chamber (3) through a second pipeline (7), the adjusting chamber (3) is internally provided with a piston (8), a piston rod (9) of the piston (8) extends to an upper chamber (10), the upper part of the piston rod (9) is provided with a worm (11), the upper chamber (10) is internally provided with a motor (12), and a rotating shaft of the motor (12) is provided with a worm wheel (13); and the turbine (13) is meshed with the worm (11). According to the automobile chassis height adjusting structure, automobile chassis height adjustment can be conveniently and flexibly achieved, the occupied space is small, response is fast, starting can be achieved at any time, the defects that an air spring is large in space occupancy rate, air leakage is slow, and an air compressor needs to be started irregularly are overcome, and the overall performance of an automobile is improved.

The invention discloses a device for controlling flow by adjusting the outlet area of a prewhirl nozzle, which comprises a gear driven disc, an adjusting disc, a mounting disc, a shielding device, an adjusting rod and the prewhirl nozzle, and is characterized in that the gear driven disc and the adjusting disc are assembled and matched through the inner diameter and the outer diameter of the gear driven disc and the adjusting disc and are mounted on the mounting disc; the prewhirl nozzle is installed on the side edge of the adjusting disc through the nozzle installation edge and fixed through a radial bolt, and the shielding device is installed on the periphery of the prewhirl nozzle and fixed to the adjusting disc. The adjusting rod is mounted on the gear driven disc, and the adjusting rod rotates the gear driven disc to control the adjusting disc to adjust the position of the shielding device, so that the area of the pre-swirl nozzle is adjusted to control the air inlet flow. And the shielding device, the pre-swirl nozzle and the air outlet are communicated to form an air flow path. The air inlet shielding device is reasonably arranged, the gear driven disc is adjusted and controlled through the adjusting rod, then the circumferential position of the adjusting disc and the circumferential position of the shielding device are controlled, the air inlet area of the pre-rotation nozzle is adjusted, the air inlet flow is effectively controlled, and adjustment is achieved.

The utility model discloses a blow mold opening and closing device which comprises a mold base, an upper mold frame capable of being opened and closed and a lower mold frame with the adjustable height are arranged on the mold base, the upper mold frame is rotationally connected with the mold base through a rotating shaft, the mold base is further provided with a hydraulic rod for driving the upper mold frame to be opened and closed, and the two ends of the hydraulic rod are rotationally connected with the upper mold frame and the mold base respectively. The lower die frame is connected with the die holder through a lifting mechanism; the lifting mechanism comprises a hydraulic cylinder arranged between the die holder and the lower die frame, the fixed end of the hydraulic cylinder is connected with the die holder, the free end of the hydraulic cylinder is connected with the lower die frame, and the hydraulic cylinder drives the lower die frame to adjust the height.

The invention discloses a neuroendoscopic soft channel with an adjustable skull fixation arm capable of retracting the scalp, and belongs to the technical field of surgical instruments for neurosurgery neuroendoscopic platforms. It comprises a puncture channel and a fixed arm structure, wherein the fixed arm structure comprises a retractor fixator and a fixing belt, and the puncture channel is connected to the retractor fixator through the fixing belt; since the channel has a fixed arm structure, it has a simple structure, reasonable design, simple operation, and strong practicality. The fixed arm structure is used for neurosurgery, and provides an adjustable and fixed skull fixation platform capable of retracting the scalp during surgery. The neuroendoscopic channel is connected to fix the neuroendoscopic channel at the most ideal position of intracranial hematoma, tumor and other lesions, and the channel puncture position is flexibly adjusted, the adjustment is convenient, the stability is good, and the fixation is reliable. During the operation, the surgical site can be accurately exposed, the operation is minimally invasive, the operation time is short, brain tissue damage is effectively reduced, and the patient's postoperative recovery is beneficial.