50results about How to "Adapt to usage needs" patented technology

This utility model discloses a tunnel fire-fighting foam liquid filling system, belonging to the field of fire-fighting equipment technology. It includes several fire boxes, a foam liquid filling vehicle, and a monitoring center. Both the fire boxes and the foam liquid filling vehicle are networked with the monitoring center to achieve data exchange. Specifically, each fire box contains a foam liquid storage tank and a first control device. The foam liquid storage tank is equipped with a first liquid level sensor, a solenoid valve, a variable frequency delivery pump, and a first flow meter. A flow regulating valve and a second flow meter are installed on the pressure water pipe. All components are connected to the first control device. The foam liquid filling vehicle contains a foam liquid storage tank, a variable frequency high-pressure pump, a battery, a third flow meter, and a second control device. Both the first and second control devices are connected to the monitoring center. This utility model provides a highly efficient, intelligent, and easy-to-maintain tunnel fire-fighting foam liquid filling system.

The application discloses a high-temperature gas flow automatic regulating valve and relates to the technical field of valves.The application solves the problems of slow response speed and poor sealing and heat insulation capacity in the prior art.The application comprises a valve body, a flow-limiting nozzle structure is arranged on the valve body, a chamber is arranged on the flow-limiting nozzle structure, flow channel openings I and II, which are in communication with the chamber, are arranged on the flow-limiting nozzle structure, an electromagnet is connected to the valve body, a movable end of the electromagnet is connected to one end of a yoke, the other end of the yoke extends into the chamber and is matched with the flow channel opening II, the movable end of the electromagnet can drive the yoke to control the opening and closing degree of the flow channel opening II, and a sealing and heat insulation structure for matching with the yoke is arranged on the chamber.The sealing and heat insulation structure is matched with the yoke directly, sealing and heat insulation are formed, and the use requirement of a high-temperature medium conveying scene is met.The end of the yoke is matched with the flow channel opening II directly to control the flow, the design of a valve core is cancelled, space occupation is saved, the structure is simplified, friction in the control process is reduced, the driving force requirement of an electromagnetic valve is reduced, the response time of control is improved.

The utility model discloses a heater convenient to hang, which comprises a machine body, a machine core assembly is arranged in the machine body, an air inlet groove is arranged at the rear end of the machine body, a heating cavity and an air outlet assembly are arranged in the machine body, the air outlet assembly is communicated with the heating cavity, the machine core assembly comprises a fan and a heating element arranged in the heating cavity, and the fan is arranged in the heating cavity. An air outlet of the fan is communicated with the heating cavity, and an air inlet of the fan is communicated with the air inlet groove; the air outlet assembly comprises a plurality of air guide plates, and the air guide plates guide hot air to be discharged. A hanging assembly is arranged at the rear end of the machine body, the hanging assembly comprises a mounting plate fixed at the rear end of the machine body, a hanging support is arranged on the mounting plate, a first elastic piece is arranged on the hanging support, a clamping part is arranged on the first elastic piece, a limiting baffle is arranged on the hanging support, and the limiting baffle is clamped on the clamping part. According to the utility model, hot air is guided to be softly and uniformly output, the comfort is improved, and meanwhile, the heating efficiency is improved.

The application provides a radar-based multipath interference area identification method, system and product, the method comprising: obtaining multiple frames of point cloud data detected by a radar; selecting target point cloud data within a preset time period and meeting a preset environment state from the multiple frames of point cloud data; wherein the preset environment state is a state in which there are people in the target space and no one is moving; constructing a space heat map based on the cumulative distribution of the target point cloud data; and obtaining a multipath interference area according to the peak distribution of the space heat map. The multipath interference area identification method can break through the inherent scene limitation that the existing technology must rely on a no-person environment in an air scene to complete multipath calibration, and can complete the identification of the multipath interference area in an indoor scene with long-term residence of people without emptying the monitoring environment, greatly improving the anti-interference ability and operation robustness of the multipath identification result, and adapting to the use demand of long-term continuous monitoring indoors.

This application relates to the field of nylon glass fiber preparation technology, and particularly to a method for preparing a nylon glass fiber composite flexible hinge. The method includes: acquiring composite data; adjusting the composite data and input data from the operator to obtain preparation data; and initiating the preparation process of the nylon glass fiber composite flexible hinge based on the preparation data and a start command from the operator. The nylon glass fiber composite flexible hinge preparation method provided by this application solves the problem that in traditional nylon glass fiber composite flexible hinge preparation processes, the use of general specifications and processes often makes precise customization according to specific needs difficult, resulting in the performance of the prepared nylon glass fiber composite flexible hinge not fully meeting the user's requirements.

The utility model provides a vehicle-mounted charger with a replaceable billboard, and belongs to the technical field of vehicle-mounted charging equipment. The vehicle-mounted charger comprises a power taking module; one end of the spring wire is connected with the output end of the power taking module; a vehicle-mounted support; the input end of the charging module is connected with the other end of the spring wire, and the charging module is mounted on the vehicle-mounted bracket; one end of the charging wire is provided with a first charging interface and a second charging interface, and the other end of the charging wire is connected with the output end of the charging module; the charging module comprises a lower shell, an upper shell, a charging mainboard, a loudspeaker, a human body sensor, a switch button, a two-dimensional code support, a two-dimensional code board and an advertising board. The vehicle-mounted charger has the advantage that the functionality of the vehicle-mounted charger is greatly improved.

The utility model relates to the technical field of drawing frames, and discloses a spinning drawing frame convenient to improve efficiency, which comprises a base, a drawing device is fixedly connected to the left side of the top of the base, a connecting rod is fixedly connected to the right side of the drawing device, a supporting assembly is arranged on the outer side of the base, and a positioning mechanism is arranged on the inner side of the base. The positioning mechanism is used for improving the machining efficiency, the inner side of the connecting rod is rotationally connected with a rotating rod, the left side and the right side of the exterior of the rotating rod are each provided with a plurality of bidirectional threaded grooves, the left side and the right side of the exterior of each bidirectional threaded groove are each in threaded connection with a moving plate, and the outer side of each moving plate is fixedly connected with a spring. According to the utility model, the rotating rod drives the bidirectional threaded groove to rotate, the movable plate and the spring are moved through threaded connection, the spring pushes the movable block and adjusts the elasticity of the movable block, the movable block adjusts the position of the wire feeding roller, and the use requirements of wires with different specifications are met by controlling the position and the elasticity of the wire feeding roller.

This invention provides a metal mask for silicon-based liquid crystal light valve chips, relating to the field of semiconductor optoelectronic device manufacturing technology. It includes a metal substrate and a pixel aperture array, alignment mark area, stress buffer, and reinforced border disposed on the metal substrate, adaptable to mass production evaporation and photolithography processes for LCoS light valve chips. The metal substrate consists of four layers stacked sequentially from bottom to top: a substrate layer, a molybdenum transition layer, a Mo-Ta-N functional pattern layer, and an Al2O3-SiO2 composite passivation layer. The molybdenum transition layer is deposited on the substrate surface using magnetron sputtering, with a surface roughness Ra < 0.15 nm. The Mo-Ta-N functional pattern layer is deposited on the surface of the molybdenum transition layer using reactive magnetron sputtering. The near-vertical, low-roughness aperture sidewalls of this invention result in shadow-free evaporation, uniform electrodes, and clear edges, improving the light utilization and contrast of the LCoS chip. It also increases the utilization rate of the evaporation material and reduces material loss during mass production.

The utility model belongs to the technical field of security inspection machines, particularly relates to an antenna frame for adjusting a cargo conveying port, and aims to solve the problems that a traditional cargo delivery mode adopts conveying and radio frequency identification antenna identification, an antenna frame for fixing a radio frequency identification antenna is of a fixed structure, 360-degree adjustment of the antenna is inconvenient, and the antenna is inconvenient to adjust. In order to solve the problems that in the prior art, the use requirements of different conditions cannot be met, according to the scheme, the conveying device comprises a supporting rod mechanism, a conveying machine shell is arranged on the side of the supporting rod mechanism, openings are formed in the two sides of the conveying machine shell, and a plurality of blocking strips are arranged at the positions of the two openings; and an angle adjusting mechanism. The goods are monitored through the two infrared correlation sensors, the antenna is automatically controlled to be opened, the antenna is not opened when no goods pass through, the RFID tag of the goods is identified through the antenna, the antenna can be adjusted by 360 degrees, the identification range of the antenna to the RFID tag is expanded, and the use requirements of different situations are met.

The invention relates to the technical field of physiological signal detection, and provides a blood oxygen detection method and device based on dual-band signal fusion, and the method comprises the following steps: aiming at an obtained reflected signal, adopting a dual-band fusion judgment method to judge whether the blood oxygen detection device is close to a detection state, and determining whether the blood oxygen detection device is in effective contact or not; when the contact is effective, a current self-adaptive adjustment algorithm is started, and the driving current of the transmitting unit is corrected in real time; and calculating the oxyhemoglobin saturation based on the obtained reflected signal to obtain a detection result. Reliable contact detection is achieved through comprehensive judgment of the red light signals and the infrared light signals, the optical signals are maintained in the optimal working interval through the current self-adaptive adjustment algorithm, and therefore the accuracy and stability of blood oxygen measurement are guaranteed.

The utility model discloses an energy storage box and an energy storage system, and belongs to the technical field of battery boxes, the energy storage box comprises a box body and a cover plate assembly, the box body is provided with an opening, the box body comprises a first plate and a second plate which are oppositely arranged, the opening is formed in the first plate, and the first plate is provided with a first surface back to the second plate. The cover plate assembly covers the opening and is provided with a second surface back to the second plate, and the second surface is arranged in a sunken mode towards the side close to the second plate relative to the first surface. According to the invention, dependence on external space is reduced through the first plate with the concave design, so that the energy storage box can be installed closer to an installation surface, and the overall occupied area is saved; and the pressure relief space added in the box body improves the installation flexibility, and the use requirement in a compact space is met.

This utility model relates to the field of children's walker technology, specifically a height-adjustable structure for a children's walker. It includes a base frame and a railing positioned above the base frame. Hollow sleeves are fixedly connected to both sides of the base frame, and solid sliding rods that fit into the inner walls of the hollow sleeves are fixedly connected to both sides of the railing. The solid sliding rods are slidably disposed within the hollow sleeves. A sliding groove is fixedly connected to the rear side of the base frame, and a ratchet rack is slidably connected inside the sliding groove. The top of the ratchet rack is fixedly connected to the railing. This utility model allows the railing to move upwards simply by pulling it up, and downwards by pushing the ratchet outwards and pressing down on the railing. This allows for flexible height adjustment to accommodate children of different heights, and automatically maintains the railing at the adjusted height without requiring additional locking mechanisms. The adjustment process is more convenient, faster, and easier to operate.

The utility model relates to the technical field of automatic door air showers, and discloses an automatic door air shower which comprises an air shower body, a fixed installation pad is fixed to the bottom of the air shower body, and the outer side of the air shower body is rotationally connected with an automatic door body through a rotating shaft. The device is provided with an auxiliary holding cleaning mechanism, when a user stands on a treading rotating disc and a holding handle moves up and down, the arms of the user move along with the holding handle and are lifted up, clothes and other parts on the armpits of the user can be effectively cleaned conveniently, then the user holds the holding handle and exerts force on the waist, and the user can clean the clothes conveniently. The lower half body is twisted to drive the treading rotating disc to rotate, so that the outer side of the body is further cleaned, and cleaning dead angles are reduced; the device is provided with a locking mechanism, stable connection between the positioning mounting block and the fixed mounting sleeve is conveniently completed, locking of the angle of the treading rotating disc can be conveniently completed, and the device can meet the use requirements of old users.

The application provides a foldable non-powered treadmill applied to a water environment, comprising a supporting assembly and a running mechanism; the running mechanism is rotationally connected with the inner side of the supporting assembly, so as to realize switching of the running mechanism between a storage state and a deployment state; in the storage state, the projection of the gravity center on the ground is located within the range surrounded by the supporting assembly on the ground; in the deployment state, the included angle between the plane where the running surface of the running mechanism is located and the horizontal plane is an acute angle. The application provides a foldable non-powered treadmill, which can realize good storage convenience, so that the structure of the treadmill is relatively stable after being stored, the damage of the treadmill is not caused easily, the use safety is enhanced, and the corrosion resistance is relatively strong, so that the use demand of the water environment can be met.

The invention discloses an escalator safety protection device based on intelligent optical perception, belongs to the technical field of escalator safety protection, and solves the problems that an existing escalator does not have intelligent crowd screening control, cannot recognize individual riding of infants and does not have real-time anti-falling protection. The device comprises a blocking device and an infrared induction device at an entrance, and optical recognition early warning devices and lateral anti-falling devices on the two sides of the escalator. An optical recognition early warning device serves as a core, an infrared induction probe is combined for preposed height monitoring, the independent sitting state of an infant is accurately recognized, a blocking device is linked to achieve entrance mechanical blocking, meanwhile, a magnetic control quick release mechanism is triggered to drive a self-folding type protective net to be unfolded, and lateral anti-falling protection is formed. And the tension sensing module can monitor the stress of the protective net and realize intelligent positioning. The device realizes infrared and optical dual identification and blocking and protection linkage protection, is fast in action response and accurate in identification, greatly improves the safety of the escalator, and is adaptive to various public scenes.

The application discloses a wavelength modulation-direct absorption dual-mode wide-range gas concentration detection method with temperature self-adaptive threshold, and belongs to the technical field of tunable diode laser absorption spectrum gas detection. The existing pure mode switching scheme generally uses a fixed concentration threshold, and temperature change will cause the switching point to deviate from the optimal error balance point, aiming at the problem, the application calibrates the critical peak absorbance as a unified reference under the reference temperature, and also calculates the line intensity under different temperatures to generate a corresponding lookup table; during work, the current line intensity is obtained by real-time temperature lookup table, and the concentration switching threshold is dynamically updated, the wavelength modulation mode is used in the initial detection stage, when the concentration continuously exceeds the threshold, the direct absorption mode is switched to, and when the concentration is lower than the hysteresis threshold, it is switched back, the application uses dynamic threshold updating to make the switching point correspond to the optimal error balance point of the two methods at all times, and the sensitivity at low concentration and the linearity at high concentration are considered.

The utility model relates to a sky rail type telescopic mechanical arm carrying robot which comprises a main beam assembly, a mechanical arm, end beam assemblies and main beam motors, the end beam assemblies are installed at the two ends of the main beam assembly, and the main beam motors are installed on the end beam assemblies and used for longitudinal movement of the end beam assemblies. The manipulator is provided with a manipulator walking motor which is movably mounted in a sliding rail of the main beam assembly; the mechanical arm further comprises a telescopic mechanical arm and a mechanical arm lifting power mechanism. The telescopic mechanical arm comprises multiple stages of telescopic units which are sequentially arranged in a nested mode from outside to inside, and a mechanical arm object carrying fixing plate arranged at the bottom of the telescopic unit on the innermost side. The fixed end of the mechanical arm lifting power mechanism is connected with the outermost telescopic unit, and the telescopic end of the mechanical arm lifting power mechanism is connected with the mechanical arm carrying fixing plate. Compared with the prior art, the utility model has the advantages of good stability, high positioning accuracy, greatly increased load and stroke, standardized structural design and the like.

The application discloses an underwater cable armored connection process applied to the field of underwater cables, which is characterized by using a pair of armored connection devices to connect and fix the disconnected armored layers by the armored connection devices, thereby enhancing the structural strength of the armored layer connection part, effectively reducing the experience requirement for the operator, shortening the overall connection operation time, and preventing the outer diameter of the connection part from being excessively thickened after connection, so that the original cable outer diameter can be maintained, no excessive protrusion is formed, the probability of hooking with underwater objects in the subsequent use process is reduced, and the risk of connection part damage is reduced; grouting filling can integrate the armored connection device and the internal cable into a whole, thereby further improving the integrity and structural stability of the connection structure, and cooperating with a small amount of outer layer wound self-adhesive sealing tape to realize effective outer sheath sealing structure, without additional thickening and reinforcement, while ensuring the connection strength and sealing property, the use requirement of the underwater cable is met.

The utility model discloses a floor type liquid crystal display mounting bracket which comprises a triangular bracket body (3), a lifting device (5) and an adjusting device (4), the adjusting device (4) and the triangular support body (3) are both connected with the lifting device (5). According to the floor type liquid crystal screen installation support, the position and the angle of the display screen can be adjusted through the lifting device (5) and the adjusting device (4), and therefore the floor type liquid crystal screen installation support can meet the use requirements of different scenes.

The application relates to the field of semiconductor testing equipment, and discloses a multi-channel integrated circuit testing board and testing equipment, which comprises a testing board main body, the upper surface of the testing board main body is provided with a supporting and protecting assembly, the surface of the testing board main body is provided with four groups of cavities, the supporting and protecting assembly comprises four groups of testing needle plates which are slidably connected to the inner sides of the cavities of the testing board main body, the supporting and protecting assembly is used for separating and testing multiple groups of chips, and the testing needle plates can be firmly supported during the testing process. By adopting a crimping linkage type shielding frame structure, the shielding frame can be automatically lifted synchronously during chip crimping testing, the current testing station is completely wrapped to form an independent shielding cavity, high-frequency electromagnetic crosstalk between adjacent channels is effectively blocked, and the testing signal is stable and accurate; in a non-testing state, the shielding frame is automatically stored in the board body, does not occupy extra wiring space, and perfectly adapts to the layout requirements of multi-channel high density.

The invention relates to a pressure container tank which comprises a pressure tank mechanism and a temporary plugging assembly, the outer side of the pressure tank mechanism is sleeved with the temporary plugging assembly, and a main body frame of the temporary plugging assembly is made of an elastic material. The temporary plugging assembly is tightly attached to the outer peripheral face of the pressure tank mechanism, and the temporary plugging assembly divides the outer peripheral face of the pressure tank mechanism into a plurality of independent closed detection areas. On the premise that an existing tank body is not greatly transformed, the leakage condition of the tank body is monitored and blocked in time, through cooperative use of the passive detection assembly, the replaceable warning mechanism and all matched parts, passive and timely response during leakage of the pressure container tank is achieved, temporary blocking can be conducted on the damaged position of the tank body, and the pressure container tank is prevented from being damaged. Medium leakage is primarily controlled, and pollution expansion is prevented.

The invention relates to the technical field of charging pile auxiliary equipment, and discloses a new energy automobile charging gun take-up and pay-off device and a using method.The device comprises a mounting frame, a driving wire extruding wheel and a driven wire extruding wheel are arranged on one side of the mounting frame, the driving wire extruding wheel is driven by a gear motor, and the driven wire extruding wheel is close to the driving wire extruding wheel through an elastic structure; the induction wheel is located on the front side of the driving wire extruding wheel and installed on a potentiometer assembly sliding block which only plays a bearing role, and the installation frame is further provided with a guide wheel and a front-back guide block. The using method comprises the steps of paying-off operation, charging state judgment, take-up triggering verification and automatic take-up homing, and a manager linkage homing step can be additionally arranged. Through motor driving and double verification, automatic take-up of the charging gun is achieved, exposure is prevented, safety is guaranteed, and take-up is accurate; the induction wheel and the position sensor are matched with a collaborative algorithm, so that paying-off is labor-saving and smooth; and the method adapts to existing charging piles, parameters are adjustable, and application is wide.

This utility model discloses a yellow phosphorus tail gas combustion system that reduces the generation of acidic substances, belonging to the field of phosphorus chemical processing technology. It solves the problems of high cost, inefficiency, poor stability, and easy secondary pollution associated with existing technologies. The system includes three sequentially connected modules: tail gas pretreatment, combustion, and purification, forming a complete treatment pathway. The pretreatment module uses a centrifugal fan to transport the tail gas, a spray-filter desulfurization tower to remove sulfides, and a high-pressure backflush pipe to ensure stable airflow. The combustion module optimizes the air-fuel ratio, combines flue gas circulation and parameter monitoring to suppress nitrogen oxide generation, and is adapted to boiler waste heat utilization. The purification module is equipped with a waste heat recovery device before electrostatic precipitator to remove impurities. The system achieves desulfurization liquid regeneration and circulation, reduces equipment corrosion and treatment costs, ensures that exhaust gas emissions meet standards, and balances environmental protection and energy utilization efficiency.

The utility model discloses a kind of gas tank flow regulating valves, it includes installation valve body, regulating valve piece and gas outlet component, the upper end of this installation valve body is recessed with adjusting slot, the regulating valve piece can be adjusted and connect in this adjusting slot, the lower side end of this adjusting slot is opened with gas outlet hole, the gas outlet component is fixedly connected in this gas outlet hole, the inner bottom of this adjusting slot is equipped with sealing cone groove, the bottom of this regulating valve piece is equipped with the sealing cone head compatible with this sealing cone groove, the sealing cone head is embedded into the sealing cone groove and forms conical surface sealing connection.The gas tank flow regulating valve of the utility model is realized by screw thread transmission the up-and-down movement of regulating valve piece, so that sealing cone head generates controllable gap in sealing cone groove, to realize the accurate regulation of gas flow, in closed state, sealing cone head and sealing cone groove are closely combined, form high-efficiency conical surface sealing, ensure that gas circuit is completely cut off.

A frit lifting machine belongs to the technical field of metal smelting and comprises a trapezoidal frame, a connecting ring is fixedly mounted on the upper surface of the trapezoidal frame, a hydraulic telescopic column is fixedly mounted on the upper surface of the connecting ring in a penetrating manner, a lifting hook capable of rotatably adjusting the hooking direction is mounted on the lower surface of the hydraulic telescopic column, and four lifting chains are rotatably mounted on the upper surface of the trapezoidal frame. The four lifting chains are respectively distributed at the four corners of the upper surface of the trapezoidal frame and are respectively and rotatably connected with the lug blocks with the holes at the four corners of the upper surface of the trapezoidal frame, an auxiliary lifting ring is detachably mounted between every two adjacent lifting chains, and a main lifting ring is connected between every two auxiliary lifting rings. The lifting hook is accurately hung in the melting block lifting ring, and the melting block can be driven to be easily separated from the iron mold barrel through contraction of the hydraulic telescopic column.

This invention relates to the field of insulating materials, specifically to a wear-resistant, high-voltage composite silicone insulating sleeve, which addresses the problems of poor wear resistance and insufficient high-voltage resistance in existing insulating sleeves. The insulating sleeve incorporates benzoxazole-modified POSS. First, fluorobenzoxazole is synthesized, then amino POSS is synthesized. The carboxyl group in fluorobenzoxazole undergoes an amidation reaction with the amino group in amino POSS to obtain benzoxazole-modified POSS. The POSS structure enhances the wear resistance of the matrix material, while also dispersing electric field stress, reducing local electric field concentration, and improving the high-voltage resistance of the matrix material. The rigid heterocyclic structure of benzoxazole further strengthens interchain interactions, reducing material loss during friction. Furthermore, benzoxazole exhibits excellent high-temperature resistance, maintaining the integrity of the material structure under high-temperature conditions, thus meeting the requirements for long-term stable operation under high-voltage environments.

This invention belongs to the technical field of miniature high-voltage DC inverters, and particularly relates to a surface-mount miniature high-voltage DC inverter device, comprising: a DC input port, an AC output port, a controllable switching switch, a control signal input port, and conductive connection components; the conductive connection components electrically connect the DC input port and the AC output port, and construct the internal inverter circuit of the device, the inverter circuit being configured with multiple sets of conductive contacts; the control signal input port is electrically connected to the controllable switching switch; the controllable switching switch can respond to external control signals to switch operating states, used to regulate the on / off and connection states of each set of conductive contacts; the inverter circuit converts the input DC power into AC power and outputs it through the AC output port by switching the on / off and connection states of each set of conductive contacts. The surface-mount miniature high-voltage DC inverter device has the advantages of simple structure, small size, and light weight, and can be well adapted to the needs of micro-robots.

The invention discloses a compact broadband frequency modulation optical fiber AOM optical path, which comprises an optical fiber coupler I, a 1 / 2 wave plate and a polarization splitting prism, the 1 / 2 wave plate and the polarization splitting prism are rotatably arranged in front of the optical fiber coupler I in sequence, and an AOM crystal, a rotatably arranged 1 / 4 wave plate, a separation blade and a spherical reflector are sequentially arranged on an optical path separated by the polarization splitting prism. The sphere center of the reflecting surface of the spherical reflector is located in the center of the AOM crystal, and a second optical fiber coupler is arranged on the other light path separated by the polarization splitting prism. According to the optical fiber AOM optical path scheme provided by the invention, a broadband frequency modulation optical fiber AOM optical path is simplified, the optical path is shortened by 1 / 3, miniaturization is further realized, and the optical fiber AOM optical path is more compact, has higher implementability and meets the use requirements of a miniaturized all-optical fiber laser optical path.

The utility model relates to the technical field of ground surface cracking prevention, in particular to a splitting machine circular knife structure capable of being quickly assembled and disassembled. Two groups of T-shaped grooves are formed in the outer wall of the cutter shaft; a mounting structure is mounted on the outer side of the cutter shaft and comprises a T-shaped block, the cutter shaft is sleeved with the T-shaped block, a first screw is welded to the surface of the T-shaped block, the outer side of the first screw is in threaded connection with a first nut, a rubber pad adheres to the surface of the T-shaped block, and the outer side of the first screw is sleeved with a shroud ring; and a second screw rod is welded at one end of the shroud ring. The T-shaped groove is formed in the cutter shaft, the T-shaped block capable of sliding is arranged in the T-shaped groove, and the first nut is matched, so that the installation position of the blade on the outer side of the cutter shaft can be flexibly adjusted according to actual requirements, the cutting size of materials can be flexibly adjusted, practicability is higher, and the blade is convenient to disassemble, assemble and replace.

The invention discloses a multi-layer circuit board via hole non-stub preparation device, and relates to the field of multi-layer circuit board preparation, the multi-layer circuit board via hole non-stub preparation device comprises a multi-layer circuit board and a processing groove used for processing the surface of the multi-layer circuit board, the multi-layer circuit board is provided with a plurality of through holes, and the processing groove is fixedly connected with a moving track. A vertical moving assembly is fixedly connected to the moving end of the moving rail and used for driving the vertical moving assembly to move in the length direction of the processing groove. Local plugging of the through hole is achieved through the plugging assembly, the through hole is divided into a copper-plating-free area and a target copper-plating area through the two silicon rubber cases on the plug, only electroplating liquid is allowed to enter the target copper-plating area through the open hole in the connecting pipe, and generation of redundant copper columns is eradicated fundamentally; meanwhile, the check ring precisely limits the insertion depth of the plug, it is ensured that the copper plating area is precisely positioned, interference of the stub on high-speed signal transmission is effectively avoided, the signal integrity and reliability of the multi-layer circuit board are improved, and the use requirements of high-end electronic equipment are met.