66results about How to "Understand features" patented technology

The invention relates to the technical field of medical instruments, in particular to an electromagnetic cardiac pulse assisting device. The electromagnetic cardiac pulse assisting device comprises an inner membrane, an outer membrane supporting body, two permanent magnets, electromagnets, a power source and a controller. The inner membrane covers the surface of the heart, and the outer membrane supporting body covers the outer side of the inner membrane. The two permanent magnets are fixed to the outer side of the inner membrane and correspond to the left ventricle and the right ventricle respectively. The two electromagnets are fixed to the inner side of the outer membrane supporting body and are opposite to the permanent magnets. The power source and the controller are used for supplying power to the electromagnets and adjusting the magnitude and the direction of current, so that the electromagnets can apply repulsive force or attractive force to the permanent magnets, and then the heart is driven to contract or relax. The device has the advantages of being capable of assisting the heart of the human body to beat, high in controllability, capable of improving the heart failure symptom and prolonging the service life of a patient, simple in structure, small and exquisite in size, capable of being implanted only through surgical operation, convenient to replace, low in manufacturing and using cost, long in service life and easy to accept by doctors and patients.

The invention discloses a cambered surface cam grinding center based on reducing grinding wheel grinding. The cambered surface cam grinding center comprises a grinding wheel main spindle box; a grinding wheel spindle is arranged in the grinding wheel main spindle box; and the grinding wheel spindle is provided with grinding wheels which are reducing grinding wheels of which diameters can be changed. When the grinding center processes a cambered surface cam, as the diameters of the grinding wheels adopted by grinding can be changed to compensate the abrasion of the grinding wheels in the grinding process, and ensure that the external diameters of the grinding wheels keep stable in the grinding process, the planet grinding mode used in the prior art can be completely abandoned, and the cambered surface cam grinding center has the characteristics of high grinding efficiency and good grinding quality.

The invention relates to the technical field of heat coating, in particular to a heat coating device and a heat coating process method. The heat coating device comprises a workpiece grabbing mechanism, a rotating mechanism and a fluidized bed. The fluidized bed comprises a dust collection hood, a fluidized bin arranged in the dust collection hood and a first fluidized plate arranged in the fluidized bin. The fluidized bin is divided by the first fluidized plate into a fluidized pool and a first air inflation cavity up and down. The first inflation cavity communicates with the fluidized pool through micropores in the first fluidized plate. Feeding openings are formed above the fluidized pool. The first air inflation cavity is provided with a first air inlet. The workpiece grabbing mechanismcan grab to-be-coated heated workpieces, and the to-be-coated portions of the workpieces are stretched in or moved out of the fluidized pool. The rotating mechanism can enable the workpieces and thefluidized pool to rotate oppositely. The heat coating device has the advantages that the fluidization effect of heat coating powder is good, the workpiece immersion procedure in the heat coating process is quite reasonable, the workpieces can be in sufficient contact with the heat coating powder in a fluidized state, and stability of heat coating quality can be improved.

PURPOSE: A system for managing / offering image information related to a customer, a server device, and a simulation engine device are provided to easily and precisely compare various kinds of images for a customer service displayed on a display screen with a shape of the customer reflected on a mirror in a beauty and fashion related facility. CONSTITUTION: Each facility terminal(100) is equipped with a display panel(102) having the display screen emitting display light, a semitransparent mirror functioning as the mirror, and a communication device(303) transmits information related to an object placed in a front side. A server(400) is equipped with a customer management card database(409), the communicating device(403), and a processing unit(402). The customer card management database stores customer management cards including the image information displayed to the display panel by each object. The processing unit extracts one customer management card matched with the received object related information from the stored customer management cards.

The invention discloses a gate machine in a cinema general affair automation system, and the gate machine comprises a case, a swinging gate core, and a gate rod. The gate machine is characterized in that the interior of the case is provided with a glasses storage and conveying mechanism and a ticket business controller; the case is provided with a glasses taking port, a glasses recycling port, a glasses taking inductor, a glasses recycling inductor, an entrance ticket checker, and an exit ticket checker; the gate machine carries out the conveying of 3D glasses through the glasses storage and conveying mechanism; the 3D glasses can be taken and recycled at the glasses taking port and the glasses recycling port; the entrance ticket checker and the exit ticket checker are connected with the ticket business controller, and transmit the ticket information to the ticket business controller, so as to transmit different information through the ticket business controller to control the opening / closing of the gate rod or control a thermal sensitive printer to print child tickets for access; the above operations does not need to be carry out manually; the gate machine is high in automation degree, achieves the high-efficiency operation, and saves the time.

The invention provides an operation input device and electronic equipment including the operation input device. In the operation input device or the electronic equipment including the operation input device, there are: an operation panel on which a half mirror vapor-deposited film is formed on one surface; and a plurality of electrostatic capacity detection type touch input sensors are configured. The operation input device further includes: a light-emitting display unit including light-emitting display elements that perform light-emitting display at each position where the plurality of touch input sensors are arranged; The light emitting display element corresponding to the operable touch input sensor in the light emits light. This makes it difficult for the operator to see the inoperable portion on the operation panel.

The invention provides a method for constructing a multiple single-cell simplified representative methylation library based on an Illumina sequencing platform. The method comprises the following steps: (1) single-cell lysis or trace DNA extraction and purification; (2) digestion with restriction endonuclease Msp I; (3) repairing the tail end and adding A to the 3'end; (4) connecting methylated joints with labels; (5) converting the hydrosulfite into non-methylated cytosine; (6) carrying out PCR enrichment on the methylation library; and (7) carrying out mixing and Illumina platform sequencingon methylated libraries with similar sizes. The method not only solves the problem of insufficient unicellular methylation sequencing initial quantity, but also can perform large-batch operation treatment by introducing a double-label sequence into each unicellular sample and is easy to realize an automatic process. The method not only reduces the methylated library construction cost of each sample, but also shortens the library construction time.

The invention relates to the cable mounting field and particularly relates to a holding type cable tightening clamp. The holding type cable tightening clamp comprises a cable pressing plate and a holding plate assembly, wherein the holding plate assembly comprises a first clamping plate and a second clamping plate, two ends of the first clamping plate and the second clamping plate are respectivelyconnected through two connecting components, two ends of the cable pressing plate are respectively connected with two sides of the holding plate assembly through two connecting components, and the connecting components are screw rods and threaded sleeves; and the first clamping plate, the second clamping plate and a cable pressing part are respectively hinged with the corresponding threaded sleeves, the middle of the first clamping plate can be matched with the middle of the second clamping plate so as to form a clamp ring, and the cable pressing plate is arranged on the cable pressing plate.The holding type cable tightening clamp is convenient to mount and dismount and occupies a small area, can be used for firmly clamping cables without damaging the cables, is applicable to insulatorswith different diameter specifications and is convenient to adjust.

The invention belongs to the cable installation field and relates to a hinging type wire tightening clamp. The hinging type wire tightening clamp comprises a wire pressing plate and a hinging plate assembly; the hinging plate assembly includes a first clamping plate and a second clamping plate; one end of the wire pressing plate is hinged to one end of the hinging plate assembly through a first connection component; the first connection component includes a hinging shaft and a first threaded sleeve which are in threaded connection with each other; the first threaded sleeve is hinged to the wire pressing plate; the other end of the wire pressing plate is detachably connected with the other end of the hinging plate assembly through a second connection component; the second connection component comprises a hanging rod and a second threaded sleeve which are in threaded connection with each other; the second threaded sleeve is hinged to the wire pressing plate; the hanging rod is provided with a non-circular hanging buckle; through holes are formed in the first clamping plate and the second clamping plate respectively; after the hanging buckle passes through the through holes, the hanging rod can be rotated, so that the hanging buckle can deviate from the second through hole so as to be hanged on the second clamping plate; the middle of the first clamping plate and the middle of thesecond clamping plate can be matched with each other, so that a clamping ring can be formed; and the wire pressing plate is provided with a wire pressing portion. The hinging type wire tightening clamp is convenient to install and disassemble, does not occupy space, and does not damage a cable.

A self-locking type fastening wire clamp comprises a U-shaped male clamp and a female clamp. The bent position of the U-shaped male clamp is provided with a first wire clamping portion, and the female clamp is provided with a second wire clamping portion. The first wire clamping portion and the second wire clamping portion can be matched to clamp a cable. Two side rods of the U-shaped male clamp are locking rods. Corresponding through lock holes are formed in the female clamp. Non-return ring teeth are arranged on the locking rods. Movable locking blocks are arranged on the side edges of the locking holes. The locking blocks are provided with corresponding locking teeth. The locking blocks abut against locking springs. The locking springs push the locking blocks so that the locking teeth can abut against the non-return ring teeth of the locking rods so that the locking rods can be limited to move forwards only rather than inverse motion, a non-return self-locking mechanism is formed, the U-shaped male clamp can move forwards only and cannot move backwards in the female clamp, and during operation, automatic locking can be achieved by directly inserting the U-shaped male clamp into the female clamp, loosening is easy; when the clamp is opened, the locking blocks are taken back just by pressing back the locking springs, the U-shaped male clamp can be taken out freely from the female clamp, operation is quite convenient and rapid, use is convenient, and the wire clamp is particularly suitable for high-altitude overhead transmission line construction.

The present invention relates to the technical field of the equipment clamp, in particular to an anti-loose type equipment clamp. The anti-loose type equipment clamp comprises an equipment clamp and a cable clamp. The equipment clamp comprises an equipment clamp body, a dynamic pressure plate, a fastening bolt and a check bolt; the fastening bolt is also provided a reverse internal thread hole; the check bolt is provided with a reverse external thread; the equipment clamp body is provided with a fastening thread hole and a static pressure plate that are arranged opposite to each other; the fastening bolt passes through the fastening thread hole and is rotatably connected with the dynamic pressure plate; and the check bolt is inserted into the fastening bolt and connected with the reverse thread of the fastening bolt. The cable clamp comprises a cable clamp body, a dynamic clamp head and a locking bolt; the cable clamp body is provided with a locking thread hole and a static clamp head that are arranged opposite to each other; the locking bolt passes through the locking thread hole and is rotatably connected with the movable clamp head; and the dynamic clamp head and the static clamp head are provided with pressure grooves. Beneficial effects of the loose type equipment clamp provided by the present invention are that the conductive contact area between the equipment terminal and the equipment clamp is large, installation is firm, the contact surface is hard to generate a gap, and the safety and reliability are ensured.

The invention discloses an optical synchronous measurement method for a combustion flow field of a scramjet engine, and the method comprises the steps: S1, giving an incoming flow condition based on ascramjet engine direct connection type test model; S2, respectively adopting a focusing schlieren technology, a laser-induced fluorescence technology and a self-luminous photograph to obtain flow field structure images of the same section at the same moment in the flow field of the scramjet engine direct connection type test model; S3, correcting the three flow field structure images obtained inthe step S2 through Matlab image processing; and S4, comparing and verifying the three flow field structure images corrected in the step S3. The method can accurately obtain the flow field characteristics in the engine combustion chamber configuration at the same time on the same cross section, improves the interactivity of information obtained by three measurement means, and improves the understanding of the flow and combustion dynamic change characteristics in the engine combustion chamber.

The invention discloses a water gel composition and water gel lens. The water gel composition is used for preparation of the water gel lens. The water gel composition comprises the following components in parts by weight: 30 to 99.68 parts by weight of a hydrophilic monomer, 0.02 to 0.5 part by weight of a barrier blue-light monomer containing a yellow dye, 0.1 to 1 part by weight of a crosslinking agent and 0.2 to 2 parts by weight of an initiator. Thus, the water gel composition and the water gel lens provided by the invention have high water content and blue-light isolation function.

An electronic blood pressure monitor (1) has a switch (21) detecting whether a front cover is open or closed. When the front cover is opened by a subject, the switch (21) detects that the cover is opened, and outputs a detection signal to a control portion (16). In control portion (16) a CPU (161) operates in response to the detection signal being received to cause a power supply switch LED (51) to flash on and off / turn on. This indicates that of a variety of switches of a console (4), the type of manipulation switch that should first be operated is a power supply switch (41).

The invention belongs to the technical field of heat pumps, and particularly relates to a heat pump circulating system suitable for low-temperature environment. The heat pump circulating system comprises a compressor, a first heat exchanger, a throttling device, a second heat exchanger, a four-way valve and a gas-liquid separator. When the heat pump circulating system is in a heating state in the low-temperature environment, a high-pressure refrigerant before entering the throttling device is guided into a high-pressure refrigerant pipe in a gas-liquid separator so as to exchange heat with unevaporated low-temperature low-pressure liquid-state refrigerant in the gas-liquid separator to completely evaporate the unevaporated low-temperature low-pressure liquid-state refrigerant in the gas-liquid separator into a gaseous refrigerant, so that a refrigerant returning the compressor is the gaseous refrigerant completely; the high-pressure refrigerant in the high-pressure refrigerant pipe further releases heat in the gas-liquid separator, super-cooling degree of the refrigerant in the high-pressure refrigerant pipe is increased, and energy efficiency of the whole heat pump circulating system is further improved.

The invention belongs to the technical field of heat pumps, and particularly relates to a heat pump system with heating and defrosting functions. The heat pump system comprises a compressor, a four-way valve, a first heat exchanger, a throttling device and a second heat exchanger which communicate with one another through a refrigerant circulation pipeline. The heat pump system is characterized byfurther comprising a working medium heater used for heating a refrigerant; and the working medium heater is connected in series between the throttling device and the first heat exchanger or the second heat exchanger. The heat pump system provided by the invention has the beneficial effects that the working medium heater is connected in series between the throttling device and one indoor heat exchanger, so that the throttled low-temperature refrigerant can be heated, the temperature of the heated refrigerant can approach the indoor environment temperature, and the indoor heat exchange can be protected against the fogging phenomenon caused by excessive temperature differentials; and furthermore, the problems that the defrosting time is hugely long, the defrosting process is not thorough, aswell as the unit failure rate and repair rate are high can be solved.

The invention relates to the electric power fitting technology field and especially discloses a multi-lead installation type shunt device. The device comprises a shunt seat and an insulation shell. One side of the shunt seat is provided with a first groove, a main wire screw and a dynamic pressing block. One side of the dynamic pressing block is rotatably connected to the main wire screw, and theother side and the groove wall of the other end of the first groove are cooperated to form a main wire clamp used for clamping a main lead. The other side of the shunt sea is provided with a second groove, several locking blocks and shunt wire holes. Each locking block corresponds to one or two shunt wire holes. Each locking block and the inner cavity wall of the second groove are hinged and cooperated to form a shunt wire clamp. The device has advantages that through the shunt seat, several shunt wires and the main lead are conductively connected, and a clamping force is constant; the shunt wire clamp includes the several independent locking blocks, each locking block can be used to fix one or two shunt wires; and when the shunt wires are installed, removed and overhauled, the other shuntwires are not influenced, and usage is flexible and convenient.

The invention belongs to the technical field of ice cream makers, and particularly relates to an air-entrapping type ice cream maker and an air-entrapping control method of the ice cream maker. The ice cream maker comprises a refrigerating cylinder, a feeding cylinder, a discharging switch, a compressor, a stirrer and a stirring motor, and further comprises an air-entrapping device and a control device; and the control device comprises a controller, a delay control module and an air volume adjusting parameter detection device, the controller can control the air-entrapping device to be started in a delayed mode through the delay control module after the compressor or the stirring motor is started, and the air-entrapping flow of the air-entrapping device can be adjusted according to the real-time detection result of the air volume adjusting parameter detection device. According to the air-entrapping type ice cream maker and the air-entrapping control method of the ice cream maker, the air-entrapping device can be controlled to be started in a delayed mode through the delay control module, the air-entrapping opportunity is reasonably controlled, the air-entrapping flow of the air-entrapping device can be adjusted according to the real-time detected air volume adjusting parameters, the air-entrapping amount is adjusted more reasonably and more efficiently, and a better puffing effect can be realized.

The invention relates to the cable cutter field and especially relates to a cable sheath cutter. The cutter comprises a cutter rest and a cutter head. The cutter rest comprises a handle, a cable support portion and an outer cylinder, wherein the cable support portion and the outer cylinder are arranged on the handle. A cylinder bottom of the outer cylinder is provided with a cutter outlet hole. The cutter outlet hole and the cable support portion are arranged oppositely. The cutter head comprises an inner cylinder, a straight cutter handle, a blade and an adjusting bolt. The inner cylinder isarranged in the outer cylinder and is only rotated. The inner cylinder is provided with an installation hole. The cutter handle is arranged in the installation hole, can only longitudinally move in the installation hole and can not rotate. One end of the cutter handle is fixedly connected to the blade and the other end forms threaded connection with the adjusting bolt. The blade faces towards thecutter outlet hole. A bolt head of the adjusting bolt is rotatably connected to the inner cylinder. The cable sheath cutter is provided with an adjusting structure and a limiting mechanism, wherein the adjusting structure is used for adjusting rotation of the inner cylinder; and the limiting mechanism is used for limiting an inner cylinder rotation position. The cutter has advantages that a peeling depth and an angle are uniform; and the cable sheath cutter can circumferentially cut a cable sheath and can also vertically cut the cable sheath.

The invention relates to the cable cutter field and especially relates to a cable peeling cutter. The cutter comprises a cutter rest and a cutter head. The cutter rest comprises a handle, a cable support portion and an outer cylinder, wherein the cable support portion and the outer cylinder are arranged on the handle. A cylinder bottom of the outer cylinder is provided with a cutter outlet hole. The cutter outlet hole and the cable support portion are arranged oppositely. The cutter head comprises an inner cylinder, a straight cutter handle, a blade and an adjusting bolt. The inner cylinder isarranged in the outer cylinder and is only rotated. The inner cylinder is provided with an installation hole. The cutter handle is arranged in the installation hole, can only longitudinally move in the installation hole and can not rotate. One end of the cutter handle is fixedly connected to the blade and the other end forms threaded connection with the adjusting bolt. The blade faces towards thecutter outlet hole. A bolt head of the adjusting bolt is rotatably connected to the inner cylinder. The cable peeling cutter is provided with an adjusting structure and a limiting mechanism, whereinthe adjusting structure is used for adjusting rotation of the inner cylinder; and the limiting mechanism is used for limiting an inner cylinder rotation position. The cutter has advantages that a peeling depth and an angle are uniform; and the cable peeling cutter can circumferentially cut a cable sheath and can also vertically cut the cable sheath.

The invention belongs to the technical field of heat pump systems, and particularly relates to a gas-liquid separator which comprises a tank. An inlet pipe and an outlet pipe are arranged in the tank,gas-liquid mixture enters the tank through the inlet pipe, a supporting rod, a connecting rod and an oil return floating ball are connected onto the outlet pipe and sequentially arranged, and the oilreturn floating ball can float on the surface of liquid.

The invention belongs to the technical field of refrigerators, and particularly relates to a refrigerator water drinking all-in-one machine. The refrigerator water drinking all-in-one machine comprises a refrigerator body and a water dispenser, wherein a cold water tank, a warm water tank and a hot water tank are arranged in the water dispenser; a refrigerant circulating system comprises a compressor, a condenser, a first throttling device, a refrigerator evaporator, a second throttling device, a cold water tank heat exchanger, a warm water tank heat exchanger, a box outer evaporator and a first valve, a second valve, a third valve, a fourth valve, a fifth valve and a sixth valve, wherein the outlet of the compressor is connected with the first valve, the condenser, the fourth valve, the first throttling device, the refrigerator evaporator, the fifth valve, the box outer evaporator and the inlet of the compressor to form a loop; and the outlet of the compressor is further sequentiallyconnected with the second valve, the warm water tank heat exchanger and the inlet of the condenser, the outlet of the condenser is further sequentially connected with the third valve, the second throttling device, the sixth valve, the cold water tank heat exchanger and the inlet of the box outer evaporator, and an electric heating wire is arranged in the hot water tank. According to the machine, the waste heat and the waste cold generated by the refrigerator body can be effectively utilized, so that the heat efficiency is improved.

The invention belongs to the technical field of temperature measurement, and particularly relates to a temperature difference value feedback sensor. The temperature difference value feedback sensor comprises a temperature sensing cylinder, wherein a first piston and a second piston which are matched are arranged in the temperature sensing cylinder, the first piston and the second piston are connected through a spring, the first piston and one end of the temperature sensing cylinder are matched to form a sealed first temperature detection part, the second piston and the other end of the temperature sensing cylinder are matched to form a sealed second temperature detection part, temperature sensing media are respectively filled in the first temperature detection part and the second temperature detection part, the temperature sensing media can expand with heat and contract with cold along with temperature change so as to drive the corresponding pistons to move, a first contact and a fourth contact which are opposite are respectively arranged on the opposite surfaces of the first piston and the second piston, and a second contact and a third contact which are arranged in the length direction of the temperature sensing cylinder are arranged on the inner wall of the temperature sensing cylinder. The temperature difference value feedback sensor can conveniently measure the temperature difference between two points in a heating system, has the characteristics of convenience, accuracy and the like, and is simple in structure.

An image forming apparatus includes an information delivery apparatus including an analysis unit and a first display controller. The analysis unit analyzes data to extract data elements. The first display controller displays preview of the data elements on a first display unit. A data element selected from the preview is transmitted to an information processing apparatus via a network. The information processing apparatus displays the data element as a symbol at a predetermined position on a second display unit. The second display unit displays an application window. When the second display unit receives input to select the symbol and place it on the application window, the data element is entered into a corresponding application and the symbol is displayed on the application window.

The invention relates to the technical field of welding, in particular to an electrode cap replacement machine. The electrode cap replacement machine comprises a casing, a cap dismounting head, a driving device and a damper, wherein the cap dismounting head is movably arranged in the casing and comprises a cap dismounting gear, a clamping jaw cover and a plurality of clamping jaws, the cap dismounting gear can rotate relative to the clamping jaw cover, the clamping jaws are uniformly arranged on an inner ring of the cap dismounting gear, the rear ends of the clamping jaws are hinged with the inner wall of the cap dismounting cap, longitudinal clamping blades are arranged at the front end of the clamping jaws, the clamping jaws are hinged with the clamping jaw cover, the damper is mounted on the casing and can perform damping positioning on the clamping jaw cover, and the driving device can drive the cap dismounting gear to rotate. The electrode cap replacement machine can realize forward and reverse cap dismounting by means of the clamping blades of a double-blade structure and is simple in structure and convenient to operate.

A method for simulating real driving vision base on three-dimensional space scene map adopts the following steps of 1) presetting a three-dimensional space coordinate system; 2) presetting the coordinate of the driving three-dimensional space move focus; 3) loading the driving three-dimensional scene map; 4) deducing the driving three-dimensional scene map change, utilizing the three-dimensional space scene map to simulate the real driving vision method, thereby being able to realize the visual skill of simulating the real driving car on the mobile device directly by using the three-dimensional space scene, and bringing conveniences to people.

The invention relates to the cable cutter field, and specifically relates to a cable chamfer peeler comprising a first knife rest, a second knife rest, and an adjusting screw rod; one side of the second knife rest is provided with a guide straight slot; one side of the first knife rest is provided with a guide block; the guide block is embedded in the guide straight slot so as to make reciprocating motions; the adjusting screw rod penetrates the guide straight slot and is threaded with the guide block; two ends of the adjusting screw rod are respectively connected with two ends of the guide straight slot in a rotary manner; the first and second knife rests are provided with a first clamping surface and a second clamping surface arranged in opposite; either the first knife rest or the second knife rest are fixedly provided with a chamfer blade; a chamfer cutting blade of the chamfer blade extends outside the corresponding clamping surface, and form an obtuse angle with the clamping surface. The advantages are that the cable chamfering is high in efficiency, and the chamfering depth and angle are even, thus effectively preventing cable inner structure damages in a chamfering process; the cable chamfer peeler is suitable for cables of different diameters, good in versatility, simple in structure, and safe and reliable.

The invention relates to the field of medical equipment and in particular discloses a biosafety blood sampling table which comprises a table body, wherein a shielding screen is arranged above the table body; both sides of the shielding screen are a medical operator side and a patient side respectively; a channel from which a patient stretches an arm to the medical operator side is formed between the lower edge of the shielding screen and a table surface; and an air exhaust and purification device for sucking, filtering and purifying air and flying saliva expired by the patient is arranged on the table surface of the patient side. By adopting the biosafety blood sampling table disclosed by the invention, effective biosafety protection on medical operators in blood sampling can be achieved,the structural designing is reasonable, and normal blood sampling is not affected.

The invention relates to the technical field of cutting tools, in particular to a multi-blade rotary feeding pipe cutting cutterhead and a pipe cutter. The multi-blade rotary feeding pipe cutting cutterhead comprises a shell, a cutterhead body, a cutterhead driving device used for driving the cutterhead body to rotate in the shell, a plurality of cutter rests and blades arranged on the cutterhead body, and a blade feeding mechanism used for driving the blades to rotate along with the cutterhead body in the forward direction to conduct synchronous stepping feeding. The cutterhead has the advantages that the multiple blades are arranged, the multiple blades can be driven to be synchronously fed in an electric driving mode, the blade feeding process and the cutterhead rotating process are synchronously carried out, and each blade can synchronously carry out tiny stepping type feeding every time the cutterhead rotates by a circle. The pipe cutter comprises the multi-blade rotary feeding pipe cutting cutterhead and a clamping device which are coaxially and fixedly connected together. The pipe cutter has the advantage that it can be guaranteed that pipes cannot accidentally slide relative to the cutterhead in the pipe cutting process.