39results about How to "Novel and practical structure" patented technology

The invention relates to a portable flaw detection device for a steel wire rope. The device comprises a housing consisting of a fixed shell and two movable shells, an excitation shielding unit, a detection induction unit for inducing magnetic signals of the excitation shielding unit, a stroke computing unit, a guide maintaining unit for controlling the advancing direction of the detection device and a portable instrument which is internally provided with a power supply. The device provided by the invention is novel and practical in structure, convenient to carry manually and simple to install and operate; synchronous flaw detection in once mounting can be realized, and disassembly and conversion are not needed; the signal to noise ratio in detection is effectively improved by means of an advanced and reliable magnetic shielding anti-jamming technique; the repeatability and the stability of flaw detection results are good, the detection precision is remarkably enhanced, and the misjudgment rate of flaws is greatly reduced.

The invention discloses a rapid conical head fusing machine for a steel wire rope, which comprises a pay-off stand and a spooling device, and also comprises an automatic sizing device and a conical fusing device, wherein the conical fusing device comprises a transformer, a locking device and a rotating handle, can generate a large current to enable the steel wire rope to be heated to be in a glowed state within a set fusing distance, and can further break the steel wire rope by the locking device and the rotating handle in a rotating way to enable the rope head to be conical; and the automatic sizing device comprises a pressure wheel and a meter wheel eccentrically provided with a Hall switch, and can count the rotating number of turns of the meter wheel and convert the number of turns into length of the steel wire rope passing through the automatic sizing device. The length of the fused steel wire rope is correct by the sizing count, the penetrator of the steel wire rope is fixed conveniently and firmly, therefore, the fusing machine is suitable for massively cutting the sizing steel wire rope, and better solves the difficulty of the sizing seal head of the steel wire rope and cutting.

The invention relates to the technical field of dies, and particularly relates to an intelligent secondary fixed die releasing injection molding die structure. The intelligent secondary fixed die releasing injection molding die structure comprises a heat insulation board, a panel, a pushing rod bottom plate, a fixed die pushing rod fixing plate, a supporting plate, a fixed die plate and a movabledie plate which are sequentially arranged from top to bottom, wherein a fixed die embedding part and a fixed die mold core are mounted in the fixed die plate; a movable die embedding part is mounted in the movable die plate; the fixed die mold core is sleeved with the fixed die embedding part; a movable mold core which is fixedly connected to the supporting plate sleeves the fixed die mold core; and a plurality of pushing rods are mounted at the bottom part of the pushing rod bottom plate and penetrate the fixed die pushing rod fixing plate, the supporting plate, the fixed die plate and the fixed die mold core. The intelligent secondary fixed die releasing injection molding die structure further comprises a hot runner pouring system. The intelligent secondary fixed die releasing injectionmolding die structure is simple and novel; the hot runner pouring system and the pushing rods are arranged at the fixed die side, such structure is opposite to a general die structure; and the outer surface of a loudspeaker-shaped cover is prevented form pushing rod and pouring port marks.

The present invention relates to a maize ear-picking roller. It is characterized by that on the surface of the ear-picking roller a dentation structure is set, i.e. the surface of every ear-picking roller has uniformly-distributed matrix array convex teeth which are arranged in the form of axial-lines and radial-columns and identical concave teeth. Two ear-picking rollers are combined together to form a pair of ear-picking roller to implement ear-picking operation. Said invention also provides their mounting method and concrete operation method.

The invention relates to a PVC (polyvinyl chloride) pipe perforating device, in particular to a PVC pipe perforator, which comprises a frame body-shaped pipe clamp, wherein a vertical internal threaded hole is formed in a frame body positioned on the top end of the pipe clamp, horizontal springs positioned on the same horizontal line are respectively and fixedly arranged on the inner sides of the two vertical side frames of the frame body of the pipe clamp body, the end parts of the horizontal springs are respectively and fixedly provided with arc-shaped plates, arc-shaped openings of the two arc-shaped plates are opposite, a threaded rod is arranged in the internal threaded hole, the top end of the threaded rod is provided with a handle, the bottom end of the threaded rod is fixedly provided with a positioning block, the center part of the bottom surface of the positioning block is provided with a positioning cone, a projected point is also arranged on the side edge of the bottom surface of the positioning block, and the height of the positioning cone is greater than or equal to the height of the projected point. The PVC pipe perforator provided by the invention has the advantages that structure novelty and practicability are realized, the perforation can be conveniently and effectively realized on PCV pipes, and the problems that no special PVC pipe perforating tool exists in the prior art, so the PVC pipe perforation is inconvenient can be solved.

The invention relates to a piano string locking peg facilitating string replacement and tuning and relates to a piano string locking device. A small cylinder inner chamber and a large cylinder inner chamber which are communicated are coaxially formed in a cylinder body, the small cylinder inner chamber is communicated with the upper end surface of the cylinder body, the large cylinder inner chamber is communicated with the lower end surface of the cylinder body, the lower end of a rotary rod is rotationally inserted in the cylinder body, a string penetration hole is formed in the upper end of the side wall of the rotary rod, a positioning wheel is arranged in the large cylinder inner chamber, teeth are manufactured on the circumferential surface of the positioning wheel, the positioning wheel is coaxially and fixedly connected with the lower end surface of the rotary rod, a positioning groove is formed in the upper surface of a bottom plate, the upper surface of the bottom plate is fixedly connected with the lower end surface of the cylinder body, a fastening tube is provided with an external thread and coaxially fixed on the upper end surface of the cylinder body, a fastening cap is in fastening connection with the fastening tube through threads, and an opening I and an opening II are formed in the side wall of the fastening cap. A piano string mounting position is fixed in a wrapping and fastening manner, the structure is novel and practical, and string replacement and tuning are more convenient.

The invention discloses a smog-free ultrasound knife. The smog-free ultrasound knife comprises a control device, a suction device, a housing and an ultrasonic knife body. The control device comprises a switch, a power unit and a transmission unit, the power unit is connected with the transmission unit, the switch is electrically connected with the power unit and a negative pressure generator, the suction device comprises the negative pressure generator and a suction part, the negative pressure generator is electrically connected with the control device, the suction device coincides with the axis of the knife bar of the ultrasonic knife body, the inner diameter of the pipe of the suction device is larger than the largest diameter of the outer pipe of the ultrasonic knife body, the suction device is communicated with the negative pressure generator in a sealing manner, one end of the suction device is in transmission connection with the transmission unit to form the seal, the other end of the suction device is in transmission connection with the housing to form the seal, and the suction device is arranged in the housing. During the cutting process of the ultrasonic knife body, the suction device can play a role in cleaning the operation visual field, and the safety and fluency of operations can be improved.

The invention relates to an assembled building technology, which aims to provide a processing method for dry-connecting assembled partition wall panels, comprising the steps of: prefabricating a support net for reinforcement, arranging the support net into a mold, stabilizing a support cushion, pouring concrete, curing and hardening to obtain; The cavity cross section of the mold is convex, and the support net is symmetrical to the left and right on the convex cross section and extends along at least the top and bottom surfaces of the convex cross section. The two shoulder positions of the "convex" shape are provided with tubular dies for machining anchor holes. The assembled partition board processed by the method of the invention is arranged in a positive and negative manner, naturally overlapped together by shoulders of a convex shape, and then the adjacent partition board is anchored from an anchor hole by an anchor bolt. The whole processing method is also simple and easy to use,can be manual form, can also use automated equipment processing.

The invention discloses a feed crushing and stirring device, which belongs to the technical field of feed processing equipment and aims to solve the problem of waste caused by sticking feed on the inner wall of the feed crushing device. The present invention comprises a tank body, a first transmission shaft and a second transmission shaft are arranged at the same height in the tank body, crushing rollers are arranged on the first transmission shaft and the second transmission shaft, and a second transmission shaft is provided at a position different from the first transmission shaft. Three transmission shafts, three groups of transmission shafts are connected in sequence through the transmission chain; the side wall of the tank body is also provided with a guide rail frame along the vertical direction, and the guide rail frame is embedded with a first slider that can slide in the guide rail of the guide rail frame. The block is connected with a cleaning frame, and one side of the cleaning frame is provided with a cleaning plate, and the cleaning frame is provided with a groove along the length direction of the cleaning frame, and the groove is embedded with a second slide block that can slide in the groove, and the second slide block Hinged on the conveyor chain. The invention drives the cleaning frame to move up and down through the running transmission shaft so as to clean the inner wall of the tank.

The present invention relates to a maize ear-picking roller. It is characterized by that on the surface of the ear-picking roller a dentation structure is set, i.e. the surface of every ear-picking roller has uniformly-distributed matrix array convex teeth which are arranged in the form of axial-lines and radial-columns and identical concave teeth. Two ear-picking rollers are combined together to form a pair of ear-picking roller to implement ear-picking operation. Said invention also provides their mounting method and concrete operation method.

The invention provides an image-type device and a method for quantitative determination of infrared reflectivity and transmissivity. The method comprises firstly calibrating the reflectivity and the transmissivity of calibration cards with a plurality of different reflectivity or transmissivity, secondly collecting reflected and transmitted images of the calibration cards and to-be-detected objects under illumination of infrared LED light sources, and performing linearity interpolation in accordance with the reflectivity values and the transmissivity values of the calibration cards to obtain the reflectivity values and the transmissivity values of the to-be-detected objects at any positions in an imaging area, thereby realizing the quantitative determination of the reflectivity and the transmissivity. According to the invention, the above detection can be carried out for prints printed with infrared ink or white watermark, and thus printing quality can be effectively controlled. The method and the device are convenient and fast, flexible in function, and strong in expansibility, and can adjust optical devices and software configuration of host computers for different applications, thereby achieving detection requirements.

The invention relates to a plate storage and transportation tray. The plate storage and transportation tray comprises a tray main body frame, supporting columns, a supporting column base and guardrails; the tray main body frame is of a latticed rectangular structure formed by welding four longitudinal beams and six cross beams; the supporting columns are arranged at the junctions between the longitudinal beams and the cross beams at the long edge of the rectangular structure, and the supporting columns are perpendicular to the plane of the tray main body frame; and the middle parts of the twolong edges of the rectangular structure of the tray main body frame are connected with each other through the guardrails, and the supporting column base is arranged at the bottoms of the supporting columns. The tray is designed for board storage and transportation of shipbuilding factories. The tray is added with container corner parts, so that the tray is convenient to assemble and disassemble, and the trays up and down are stable when the trays are laminated; and the guardrails not only enable the tray to be not easily deformed during lifting, but also enable the supporting columns to be more stable. The plate storage and transportation tray is convenient to use, and also improves the working efficiency.

The invention relates to the technical field of logistics transportation, in particular to an intelligent trolley of an intelligent logistics system. The intelligent trolley comprises a trolley body, two U-shaped guide rails are arranged on the two sides of the top of the trolley body at intervals, sliding sleeves are slidably connected to the outer sides of the U-shaped guide rails, a loading plate is fixedly installed at the tops of the sliding sleeves, and a sleeve is fixedly installed at the top of the trolley body. In the braking state, the loading plate pulls the L-shaped rod to move, so that the piston moves in the sleeve, air inlet airflow can be generated in the state, the airflow pushes the blocking piece to turn over, after braking is completed, the piston resets under the action of the spring, exhaust is started at the moment, due to the fact that the blocking piece covers the front portion of the through hole at the moment, the airflow can only be exhausted through the exhaust hole. Due to the fact that the hole diameter of the exhaust hole is small, the buffering effect is achieved, the carrying plate can be slowly reset, the problem that objects slide out of the carrying plate before and after braking is avoided, and the design is reasonable.

The invention discloses a plug-in type large-flow check valve which is installed inside an integrated valve block of hydraulic system oil return by virtue of threads (11) on a plug-in valve body (9). The plug-in type large-flow check valve comprises the plug-in valve body (9) which is connected with the valve block, wherein a cover plate (6), a spring (3) and a support sleeve (4) are installed on the plug-in valve body (9) and stringed together through a bolt (5), opening pressure is fixed and regulated by a locknut (2), and an opening pin (1) is installed at the end of the bolt (5) so as to prevent the bolt (5) from dropping. With the adoption of the plug-in type large-flow check valve, the structure is novel and practical (a plug-in mode is adopted, so that a connecting pipeline is saved), the size is small, the installation is convenient, pressure drop of the flow is small, oil passing capability is strong, the flow of a cooler can keep smooth, and the cooler can be effectively prevented from bursting due to a large flow.

The invention relates to a wood-plastic base composite floor with a solid wood panel, comprising a base plate and a panel; the wood-plastic base composite floor is characterized in that: the base plate is made of wood-plastic material, and the panel is made of solid wood, the base plate is connected with the panel in a molding-injection way. In the technical proposal of the invention, particularly, the base plate is made of the wood-plastic material, the panel is made of solid wood and the base plate and the panel are connected in a molding-injection way, the invention has the beneficial effects that the structure is novel and practical, wood is saved, the application range is wide, the floor is helpful to environmental protection, the cost is low and the usage is convenient.

The invention relates to PVC tube drainage equipment, in particular to a PVC tube drainage device. The PVC tube drainage device comprises a tubular drainage nozzle and a hanging rod. A position clamping ring is arranged at the upper end of the tube body of the drainage nozzle, the tube body of the drainage nozzle is further provided with a hanging hole located below the position clamping ring, a first hook capable of being hung on the tube body of a PVC tube is arranged at the top end of the hanging rod, a second hook matched with the hanging hole is arranged at the bottom end of the hanging rod, the first hook and the second hook are integrally connected with the hanging rod, the opening diameter of the upper end of the tube body of the drainage nozzle is 20 mm, the opening diameter of the lower body of the tube body is 15 mm, and the tube body is 30 millimeter high. The PVC tube drainage device is novel and practical in structure, can effectively drain rainwater flowing into the PVC tube and solves the problem that frost cracking of optical cables occurs in winter due to the fact that the rainwater flowing into the PVC tube in an optical cable inspection well cannot be drained off.

Provided is a connecting rod transmission mechanism with a non-pressure air door for a mine. A plane linkage mechanism is arranged inside an upper transverse frame of the non-pressure air door. The plane linkage mechanism is mainly composed of rockers, a connecting rod, rocker fulcrum shafts and a connecting rod fulcrum shaft. The rockers are arranged at the two ends of the plane linkage mechanism and are connected with the rocker fulcrum shafts. The connecting rod is connected with the two rockers as a whole through the connecting rod fulcrum shaft. The rocker fulcrum shafts penetrate through rotational components arranged at the two ends of the upper transverse frame of the non-pressure air door and fix the plane linkage mechanism inside the upper transverse frame of the non-pressure air door to form a built-in connecting rod transmission mechanism. When one door leaf of two door leaves of the non-pressure air door is opened or closed, the other door leaf can be simultaneously opened or closed in an opposite direction through the built-in connecting rod transmission mechanism. The connecting rod transmission mechanism with the non-pressure air door for the mine has the advantages of being novel and practical in structure, flexible in opening, small in volume and occupying space, and suitable for being used in an underground coal mine.

The invention relates to the assembling type building technique and aims at providing a dry-method-connection assembly type partition board. According to the partition board, the assembling process issimplified, and the assembling effect is improved. The partition board comprises a board body and a support net, wherein the support net is located in the body and plays a supporting reinforcing role, the cross section of the board body is of a Chinese character 'tu' (meaning convex in English) structure, the support net is arranged on the cross section of the board body in a left-right symmetrymanner and extends along the top surface and bottom surface of the Chinese character 'tu' structure; and anchor holes for connecting adjacent board bodies are formed in two shoulders of the Chinese character 'tu' structure of the board body. Adjacent shoulders of the partition board and a construction column are anchored by virtue of the anchor holes and anchor bolts through a square tube; and thesquare tube is welded and fixed with a preserved steel rib of the construction column. The partition board can be connected with a column through an angle iron expansion screw structure or other structures. The structure and the assembling manner are novel and practical, and the prior art in the industry is revolutionarily improved.

The invention discloses a steam combustion-supporting boiler. The steam combustion-supporting boiler comprises a boiler and a pressure balance valve, wherein the boiler is provided with a water cavity and a hearth; a water tank is arranged outside the boiler; the hearth is provided with a steam generation device; the steam generation device comprises a heating pipe, a steam drum and a steam spray pipe; the pressure balance valve comprises a valve body and a valve core; the valve body is provided with a valve body cavity; the left end of the valve body is provided with a steam joint, and the right end of the valve body is provided with a threaded joint; the steam joint is communicated with a space above the water surface in the cavity of the water tank; a valve core is arranged in the valve body cavity; the valve body is provided with a water inlet and a water outlet; the valve core is a shaft which is provided with an annular groove; a pressure adjusting bolt and a pressure adjusting spring are arranged in the threaded joint; a cooling water pipe is arranged in the space above the water surface of the cavity of the water tank in a penetrating manner; a water inlet end of the cooling water pipe is communicated with the lower end of the water cavity through the pressure balance valve, and a water outlet end of the cooling water pipe is communicated with the upper end of the water cavity. According to the steam combustion-supporting boiler, the steam pressure of the steam drum is kept at constant pressure, so that the combustion of the boiler is kept in a stable state, the time and the labor are saved, and the boiler is convenient to use.

The invention discloses a large-flow check valve for a filter. A valve body (9) is connected with an oil return filter, a cover plate (7), a support pipe (5), a spring (4) and a pressure plate (3) are installed in the valve body (9) and stringed together by a bolt (6), opening pressure is fixed and regulated by a locknut (2), and an opening pin (1) is also installed at the end of the bolt (6) so as to prevent the bolt (6) from dropping. With the adoption of the large-flow check valve, the structure is novel and practical, pressure drop of a flow is small, oil passing capability is strong, and the requirements for adding the oil return filter of an engineering machinery hydraulic system can be satisfied.

The invention discloses a smog-free ultrasound knife. The smog-free ultrasound knife comprises a control device, a suction device, a housing and an ultrasonic knife body. The control device comprises a switch, a power unit and a transmission unit, the power unit is connected with the transmission unit, the switch is electrically connected with the power unit and a negative pressure generator, the suction device comprises the negative pressure generator and a suction part, the negative pressure generator is electrically connected with the control device, the suction device coincides with the axis of the knife bar of the ultrasonic knife body, the inner diameter of the pipe of the suction device is larger than the largest diameter of the outer pipe of the ultrasonic knife body, the suction device is communicated with the negative pressure generator in a sealing manner, one end of the suction device is in transmission connection with the transmission unit to form the seal, the other end of the suction device is in transmission connection with the housing to form the seal, and the suction device is arranged in the housing. During the cutting process of the ultrasonic knife body, the suction device can play a role in cleaning the operation visual field, and the safety and fluency of operations can be improved.

The invention relates to a portable flaw detection device for a steel wire rope. The device comprises a housing consisting of a fixed shell and two movable shells, an excitation shielding unit, a detection induction unit for inducing magnetic signals of the excitation shielding unit, a stroke computing unit, a guide maintaining unit for controlling the advancing direction of the detection device and a portable instrument which is internally provided with a power supply. The device provided by the invention is novel and practical in structure, convenient to carry manually and simple to install and operate; synchronous flaw detection in once mounting can be realized, and disassembly and conversion are not needed; the signal to noise ratio in detection is effectively improved by means of an advanced and reliable magnetic shielding anti-jamming technique; the repeatability and the stability of flaw detection results are good, the detection precision is remarkably enhanced, and the misjudgment rate of flaws is greatly reduced.

The invention relates to a piano string locking peg facilitating string replacement and tuning and relates to a piano string locking device. A small cylinder inner chamber and a large cylinder inner chamber which are communicated are coaxially formed in a cylinder body, the small cylinder inner chamber is communicated with the upper end surface of the cylinder body, the large cylinder inner chamber is communicated with the lower end surface of the cylinder body, the lower end of a rotary rod is rotationally inserted in the cylinder body, a string penetration hole is formed in the upper end of the side wall of the rotary rod, a positioning wheel is arranged in the large cylinder inner chamber, teeth are manufactured on the circumferential surface of the positioning wheel, the positioning wheel is coaxially and fixedly connected with the lower end surface of the rotary rod, a positioning groove is formed in the upper surface of a bottom plate, the upper surface of the bottom plate is fixedly connected with the lower end surface of the cylinder body, a fastening tube is provided with an external thread and coaxially fixed on the upper end surface of the cylinder body, a fastening cap is in fastening connection with the fastening tube through threads, and an opening I and an opening II are formed in the side wall of the fastening cap. A piano string mounting position is fixed in a wrapping and fastening manner, the structure is novel and practical, and string replacement and tuning are more convenient.

The invention discloses a feed crushing and stirring device, belonging to the technical field of feed processing equipment. The object of the invention is to solve the problem of wasting caused by sticking of feeds onto the inner wall of a feed crushing device. The feed crushing and stirring device of the invention comprises a tank body; a first transmission shaft and a second transmission shaft are arranged in the tank body at the same height, and are both provided with crushing rollers; a third transmission shaft at a height position different from the height position of the first transmission shaft; the three groups of transmission shaft are sequentially connected by a conveyor chain; the side wall of the tank body is further provided with a guide rail rack along a vertical direction; the guide rail rack is embedded with a first slide block which can slide in the guide rails of the guide rail rack; the first slide block is connected with a cleaning rack; one side of the cleaning rack is provided with a cleaning plate; the cleaning rack is provided with a groove along the length direction of the cleaning rack; a second slide block capable of sliding in the groove is embedded in the groove; and the second slide block is hinged onto the conveyor chain. According to the feed crushing and stirring device of the invention, the cleaning rack moves up and down under the driving by the running transmission shafts so as to clean the inner wall of the tank body.

The invention belongs to the field of equipment for processing crystal workpieces. Equipment for grinding a crystal ball comprises a stander, and two handpieces, a linear guide rail, a rack, a first millstone driving device, a first millstone, a second millstone driving device and a second millstone with a grinding function different from that of the first millstone which are arranged on the stander, wherein a dustproof and waterproof telescopic guide rail sheath is sleeved on the linear guide rail; and wire boxes for accommodating connection wires are arranged between the stander and the two handpieces. The equipment for grinding the crystal ball has the advantage of novel structure, has functions of rough grinding, fine grinding and polishing, and is high in production efficiency and processing precision.

A connecting rod transmission mechanism for a non-pressure damper for mining. A planar link mechanism is installed inside the upper horizontal frame of the non-pressurized damper. Composition, the rocker is set at both ends of the plane linkage mechanism, and the two rockers are respectively connected with the fulcrum shaft of the rocker; the connecting rod connects the two rockers as a whole through the fulcrum shaft of the connecting rod; Rotating parts at both ends of the upper horizontal frame of the air door fix the plane linkage mechanism inside the upper horizontal frame of the non-pressure air door to form a built-in linkage transmission mechanism. When any one of the two leaves of the non-pressure air door is opened or closed, the other door leaf can be opened or closed synchronously and in different directions through the built-in transmission mechanism. The invention has the advantages of novel and practical structure, flexible opening, small volume and small occupied space, and is suitable for underground use in coal mines.

The invention relates to an assembly type bus waiting hall which comprises at least one bus waiting unit. Each bus waiting unit comprises a bus shelter shell and a bus shelter frame, each bus shelterframe comprises a supporting stand column and a supporting inclined column, the outline of each supporting inclined column is consistent with that of the corresponding bus shelter shell, and each supporting stand column is fixedly connected with one end of the corresponding supporting inclined column into a whole. The other end of each supporting stand column and the other end of each supporting inclined column are fixedly connected to a base arranged on the ground, the two sides of each bus shelter shell are in lap joint with the supporting inclined columns respectively, a containing space isformed at the lower portion of each bus shelter shell and the lower portion of the corresponding bus shelter frame, and a water stop rubber belt is arranged at the joint of each bus shelter shell andthe corresponding supporting inclined column. By the adoption of the assembly type connecting structure, components are standardized, the structure is novel and practical, the arranged water stop rubber belts can effectively prevent water leakage of the shell, the size of the waiting hall can be changed through combination of the multiple waiting units, the components are convenient to assemble and disassemble, and the problem that the bus waiting hall is inconvenient to install in urban construction is effectively solved.

The invention discloses a bulk material bidirectional turning conveying system. The system is characterized in that the system comprises two conveyors with same structures; front frame body and rear frame body of the conveyor are mutually hinged through a hinge pin; a telescopic frame is arranged on the front frame body of the conveyor; and the front frame body is driven through a pneumatic or electric pull rod to rotate around the hinge pin. The system has a novel and practical structure, can realize the bidirectional turning conveying of bulk material through the matching of stretching variation and altitude variation at the end part of a position where the two bidirectional conveyors are connected, and has significance in the respects of reducing the investment, improving the utilization rate of equipment and improving the loading and unloading operation efficiency of bulk material.

The invention discloses an integral large-flow check valve which comprises a valve body (8) connected with a hydraulic system, wherein a cover plate (9), a support pipe (6), a spring (5) and a pressure plate (4) are installed in the valve body (8) and stringed by a bolt (7), opening pressure is fixed and regulated by a locknut (3), an opening pin (2) is installed at the end of the bolt (7) so as to prevent the bolt (7) from dropping, and a pressure detection hole (10) is formed at an oil inlet (11) of the valve body (8) so as to detect the opening pressure of the check valve and pressure variation in the using process. With the adoption of the integral large-flow check valve, the structure is novel and practical, pressure drop of the flow is small, oil passing capability is strong, the flow of a cooler can keep smooth, and the cooler can be effectively prevented from bursting due to a large flow.