30results about How to "Protect the sealing surface" patented technology

The invention provides an internal sealing specific pressure-regulable fixed-ball ball valve, which comprises a valve body, a bonnet, a ball, a floating valve seat, valve packing and the like, wherein a plurality of sets of short adjusting screw units are mounted on the sidewall of the bonnet and are connected with a round hole plate, plungers, springs and the floating valve seat in a valve cavity, the sealing specific pressure between the ball and the floating valve seat can be regulated by rotating short screw lifters outside the sidewall of the bonnet, a plurality of sets of long adjustingscrew units are mounted on the sidewall of the bonnet as well, and can regulate the sealing specific pressure upon the valve seat packing outside the sidewall of the bonnet, and because of the adoption of the the mechanism, the faults of jam and leakage can be eliminated when the valve is in use. The internal sealing specific pressure-regulable fixed-ball ball valve also comprises an automatic dirt-scraping unit, and thereby having longer operability and sealing property.

The invention discloses a stop valve with a valve seat provided with a protective sleeve, belonging to the technical field of the structure of the stop valve and aiming to solve the problems of the influence on the closing tightness due to the fact that the sealing surface of the valve seat of existing stop valve is easy to have defect in the scouring of fluid. The stop valve comprises a valve body, a valve seat and a valve plate. A protective sleeve is arranged on the inner ring of the valve seat; the lower end of the protective sleeve is connected with an elastic bearing mechanism. The protective sleeve moves upwards when the valve plate is opened, the upper end face of the protective sleeve is higher than the sealing surface of the valve seat; the upper end face of the protective sleeve clings to the lower surface of the valve plate to move downwards together with the valve plate when the valve plate is closed. The stop valve with the valve seat provided with the protective sleeve is applied to the stop valve with a planar valve plate.

The invention relates to a front cassette type jack and tool anchorage equipment for prestress tension. The equipment comprises a front clamping type tool anchorage device and a front cassette type jack with a force measurement sensor, wherein the front clamping type tool anchorage device includes a tool anchorage disc, a front push plate, a back push plate, a tool clamping sheet, a back-push rod,a forward push spring and a retraction amount feeler lever; the front cassette type jack includes a jack outer cylinder, a jack back baffle plate, a jack front baffle plate, the force measurement sensor, a limiting plate mounting seat and a jack piston; the front clamping type tool anchorage device is sleeved in the jack piston of the front cassette type jack. According to the front cassette typejack and tool anchorage equipment for prestress tension, while a steel strand is saved, the retraction amount of the tool clamping sheet can be detected through the retraction amount feeler lever, thus the tension efficiency and the tension control precision can be improved.

The invention provides a lock slag and lock hopper valve with purging and flushing devices for the coal chemical industry. A purging device and a cleaning device are fixedly connected on a valve body, a journal of a valve stem and inner rings of upper and lower bearing sleeves are sprayed with WC (wolfram carbide) and Ni60, and the surface of a valve body bushing, the surface of a valve seat and the inner wall of a ball are all sprayed with the WC. Gaps between the bearing sleeves and the valve stem can be purged, a valve body cavity can be cleaned, occurrence of jamming of the valve is avoided, the valve has better wear resistance and corrosion resistance, and service life is prolonged.

The invention provides a combined valve. The combined valve can be free of leakage for a long time under severe working conditions. The combined valve comprises a combined valve body, wherein a medium inlet and a ball valve cavity communicated with the medium inlet are formed in one side of the combined valve body, a medium outlet and a stop valve cavity communicated with the medium outlet are formed in the other side of the combined valve body, the ball valve cavity is communicated with the stop valve cavity, a stop valve element arranged in the stop valve cavity a is connected with stop valve rod, a handle is connected to one end of the stop valve rod, a ball valve ball body arranged in the ball valve cavity is connected with a ball valve rod, the ball valve rod is connected with an output shaft at one end of a speed reduction mechanism, the other end of the speed reduction mechanism is connected with a driving gear for driving the speed reduction mechanism to rotate, the driving gear is meshed with a transition gear, and the stop valve rod drives the transition gear to rotate. The combined valve is integrally designed, has few leakage points, and is more reliable in pipeline installation, and more convenient to operate.

The invention relates to a washout-preventing soft-sealing single-seat regulating valve, which comprises a valve body, a valve cover, a valve seat, a soft-sealing washer, a valve rod and a valve plug; the valve body is coaxially connected with the valve cover, the valve plug is coaxially arranged at the lower end of the valve rod which is arranged in the valve body, the valve seat is coaxially fixedly arranged on the valve body between the lower part of the valve plug and the valve body, a seal is arranged between the valve seat and the valve body, the soft-sealing washer is fixed arranged on the outer edge of the valve plug which is in contact with the valve seat, the valve plug and the valve seat form sealing cooperated through the soft-sealing washer, the valve plug realizes regulation and on and off of the valve through the driving of the valve rod, and a guide convex plate ring is coaxially arranged on the valve plug at the lower end face of the soft-sealing washer at the lower part of the valve plug, which is in contact with the valve seat. The regulating valve can avoid direct washout of a medium on a nonmetal sealing surface, and has a more remarkable effect especially under the working condition of higher pressure difference, thus the service life can be effectively prolonged.

The invention aims to provide a large-dive-depth Kinston valve with small valve opening force. The large-dive-depth Kinston valve comprises a hand wheel, a valve rod, a valve rod power block, a bearing box, a valve body, a valve head and a reinforcement rod mechanism, wherein the hand wheel is connected with the valve rod power block through a spline, the upper portion of the valve rod is sleeved with the valve rod power block, threads on the upper portion of the valve rod are matched with the valve rod power block, the bearing box is arranged outside the valve rod power block, an upper angle thrust bearing and a lower angle thrust bearing are arranged in the bearing box, the valve rod power block is provided with a protrusion, the upper angle thrust bearing is located above the protrusion, the lower angle thrust bearing is located below the protrusion, the bearing box is connected with the valve body, the lower portion of the valve rod is located in the valve body, a valve head cover is arranged in the valve head, the head of the valve rod is located in a cavity formed by the valve head cover and the valve head, and a moving space is formed between the head of the valve rod and the valve head when the head of the valve rod is attached to the valve head cover. According to the large-dive-depth Kinston valve, a two-level reinforcement mechanism is adopted, and the valve opening force is greatly reduced. The seal surface of an end mouth of the valve is protected, and reliability of the valve is enhanced.

The invention discloses an anti-blocking regulating valve. The anti-blocking regulating valve comprises a valve body, a valve cavity is formed in the valve body, a valve plate is arranged in the valvecavity, the valve plate divides the valve cavity into an upper valve cavity and a lower valve cavity, a valve port is formed in the valve plate, and an orifice is formed in the position, at the upperend of the valve port, of the valve plate; an outlet pipe and an inlet pipe are arranged on the side face of the valve body; a valve deck is installed at the upper end of the valve body, a shaft rodis arranged in the valve deck, a throttling valve head is arranged at the lower end of the shaft rod, a valve rod is connected into the shaft rod and the throttling valve head in a threaded mode, anda valve block is arranged at the lower end of the valve rod; and a plurality of valve seat baffles are arranged at the position, around the orifice, on the valve plate along the circumferential direction of the orifice, and a valve control assembly used for controlling the multiple valve seat baffles to move synchronously is arranged in the valve body. The anti-blocking regulating valve is simplein structure and can be prevented from being blocked.

The invention relates to a high-performance slow-shut check valve which comprises a main valve and a slot-shut mechanism, wherein a swing check valve is adopted as the main valve which is mainly characterized in that one end of a main valve rotating shaft extends out of the valve body and is connected with the slow-shut mechanism; the slow-shut mechanism is of a piston structure and comprises a cylinder body, a cylinder cover, a piston rod, a piston convex disk and a piston concave disk, one end of the piston rod is fixedly connected with the rotating shaft, part of the other end of the piston rod, which is positioned in the cylinder body, is provided with a T-shaped thread, the piston convex disk and the piston concave disk are respectively provided with a positive T-shaped thread and a negative T-shaped thread and meshed with the piston rod, a convex block of the piston convex disk is movably matched with a concave hole of the piston convex disk, and a piston cavity between the piston convex disk and the piston concave disk, a piston cavity between the piston convex disk and the cylinder body, and a piston cavity between the piston convex disk and the cylinder cover are respectively communicated with three port channels of a regulating valve. The high-performance slow-shut check valve has the characteristics of low closing noise, stable slow-shut performance, convenience forinstallation, simple structure and the like, and is suitable for control valves of preventing mediums on outlet pipelines of various pump stations from flowing backwards.

The invention discloses an online cleaning basket filter for a high-concentration formaldehyde pipeline in the production technology of trioxymethylene. The basket filter comprises a basket filter body, a scraping jet cleaner, a hollow cleaning support rod I, a hollow cleaning support rod II, a hand wheel, a transmission rod and a transmission force distribution plate; a sealing cover is arrangedat the upper open end of the basket filter body, the hollow cleaning support rods I and the hollow cleaning support rod II respectively vertically go through the sealing cover and are connected with the scraping jet cleaner, the top ends of the hollow cleaning support rod I and the hollow cleaning support rod II are located at the upper part of the sealing cover and are respectively connected withthe lower end of the transmission rod through the transmission force distribution plate, the upper end of the transmission rod is connected with the hand wheel, and the hand wheel is located at a power support at the upper part of the sealing cover. The basket filter can realize online cleaning at any time without affecting the running of a system, and also can realize closed cleaning in order toeffectively control the pollution of toxic and harmful media to the environment and the occupational health of operators. The basket filter prolongs the overhaul period to one year or above in orderto greatly reduce the workload of the operators.

The invention provides an impact resisting check valve. The impact resisting check valve is composed of a valve body, a valve seat, a valve clack, an elastic piece and a valve cover. The valve clack is arranged on the valve seat in a vertical moving mode. The elastic piece is arranged on the valve clack in a sleeving mode to make the valve clack have the tendency of being closed to the valve seat. A guide sleeve and a fixing plug are fixedly arranged above a middle cavity of the valve body. The fixing plug is located in the middle of the guide sleeve and extends downwards. The upper portion of the valve clack is arranged in the guide sleeve in a vertical sliding fit mode. A receding space is arranged above the valve clack and located on the guide sleeve. A piston hole for the fixing plug to be inserted therein is formed in the valve clack. A through hole communicated with the middle cavity is formed in the bottom of the side wall of the piston hole. A buffering structure hole communicated with the piston hole and the middle cavity is formed above the through hole. The buffering structure hole vertically extends in the length direction of the buffering structure hole. The buffering structure hole is provided with an upper section and a lower section which are communicated. The moving speed of the valve clack is controlled through the relative position relation of the fixing plug and the buffering structure hole. Impact force produced between the valve clack and the valve seat when the valve clack is closed is prevented, and therefore the service life of the valve is prolonged.

A gate valve has a gate valve seat for sealing a valve body to a gate of the gate valve. The valve seat extends from a flow passage of the valve body into a cavity of the valve body parallel to an axis of the flow passage. The cavity is perpendicular to the flow passage, and the gate is disposed within the cavity. The valve seat has a tubular body having a face for contact with a gate, and an end opposite the face adjacent to and in contact with the valve body. The valve seat also includes a sleeve positioned on an inner diameter of the tubular body, the sleeve adapted to receive a shear force for shearing a member extending through the flow passage, the inner sleeve having an adjustable length.

The invention relates to a nuclear power station manhole cover plate assembling and disassembling tool. The assembling and disassembling tool is used for opening manhole cover plates of nuclear powerplant container equipment. The assembling and disassembling tool comprises a pair of assembling and disassembling rods which are arranged in a complete set, each assembling and disassembling rod comprises a prying rod, a movable supporting ring and a movable head; and for each assembling and disassembling rod, the movable head is arranged at the top end of the prying rod and is hinged to the prying rod, a limiting hole is formed in the middle of the prying rod, a limiting pin is inserted into the limiting hole, and the movable supporting ring sleeves the prying rod and slides between the movable head and the limiting pin. Compared with the prior art, the assembling and disassembling tool has the advantages of being labor-saving, safe, capable of protecting a flange surface, wide in application range and the like.

The invention discloses a high-insulation and high-voltage GIS (gas insulated switchgear) casing. The casing comprises a main cylinder, main cylinder flanges and branch cylinder assemblies, wherein female ends of the main cylinder flanges are nested on the main cylinder at an interval and fixedly connected through welding; each branch cylinder assembly comprises a branch cylinder II and a branch cylinder flange; the outward end surfaces of the main cylinder flanges concave inwards to form round grooves I; further improvement is characterized in that the outward end surfaces of the branch cylinder flanges concave inwards to form round grooves II; holes are formed in the side wall of the main cylinder, openings of the holes extend outwards to form the branch cylinders I, and the intersections of the main cylinder and the branch cylinders I are in circular arc transition connection; the branch cylinder I is welded and fixedly connected with the end part of the branch cylinder II of the branch cylinder assembly; the diameter of an inner hole of each main cylinder flange is equal to that of an inner hole of the main cylinder, and a joint between the inner end surface of the female end of each main cylinder flange and each inner groove of the main cylinder is ground flush; insulated coatings are arranged on the inner walls of the inner holes of the main cylinder and the walls of theinner holes of the main cylinder flanges. The sealing surfaces of the main cylinder flanges and the branch cylinder flanges can be effectively protected, the insulation performance is good, and no discharge phenomenon can be caused.

The invention discloses an anti-resonance clean water valve. A hydraulic cylinder is arranged at the upper part of a valve body, wherein an upper flange adapter tube opening is formed in the lower part of the valve body; a lower flange adapter tube opening is formed between the flange adapter tube opening in the lower part and a hydraulic cylinder connection flange; a sealing structure is arranged in an opposite position between a flow intercepting direction and a medium controlling direction; the sealing structure is characterized in that a sealing valve seat is arranged at the root part of the flange adapter tube opening of the lower part; the sealing valve seat is in close fit with the valve body; the sealing surface is arranged under the valve seat; a sealing valve plate is fixed at the lower end of a piston rod of a hydraulic piston and is connected with the lower end of the piston rod through screw threads; a valve plate is arranged on the lower side of the valve seat; the sealing surface of the valve plate faces upwards. Compared to the prior art, the anti-resonance clean water valve has the advantages that the valve switching-off force and the medium pushing force offset each other, so the resonance of the valve plate end is avoided, the valve seat and the valve plate sealing surface are protected, the valve switching-on force and the medium pushing force offset each other, so the resonance of the piston cylinder end is avoided, and the piston and the piston rod structure are protected. The anti-resonance clean water valve is safe and reliable, excellent in practical function, and capable of ensuring the continuous operation of the industrial production.

The invention provides a lock slag and lock hopper valve with purging and flushing devices for the coal chemical industry. A purging device and a cleaning device are fixedly connected on a valve body, a journal of a valve stem and inner rings of upper and lower bearing sleeves are sprayed with WC (wolfram carbide) and Ni60, and the surface of a valve body bushing, the surface of a valve seat and the inner wall of a ball are all sprayed with the WC. Gaps between the bearing sleeves and the valve stem can be purged, a valve body cavity can be cleaned, occurrence of jamming of the valve is avoided, the valve has better wear resistance and corrosion resistance, and service life is prolonged.

The invention discloses a two-way sealing butterfly valve which comprises a valve body, a butterfly plate installed in the valve body, a valve seat two-way sealing assembly installed in the valve body, and a valve rod connected with the butterfly plate and used for driving the butterfly plate to open or close a valve body medium channel. The valve body medium channel is obliquely arranged, and an included angle of 2-5 degrees is formed between the axial direction of the valve body medium channel and the horizontal direction; the valve seat two-way sealing assembly comprises an O-type sealing ring, a basin-shaped sealing ring and a pressing ring, the O-type sealing ring is installed in a valve seat groove, the basin-shaped sealing ring presses the O-type sealing ring and falls into the valve seat groove, the pressing ring abuts against the basin-shaped sealing ring, and the pressing ring limits the basin-shaped sealing ring in the valve seat groove in an adjustable mode. The two-way sealing butterfly valve has the advantages of being simple in structure, convenient to manufacture, reliable in use and high in practicality, is good in sealing effect, and reduces damage to the sealing surface of the butterfly valve; besides, few medium residues exist, pollution of the original residual mediums on new mediums is reduced when different mediums are adjusted for use, and the possible permeation action of the residual mediums is avoided; meanwhile, operation torque can be lowered.

The invention relates to a front clamping jack and tool anchor equipment for prestress tension, comprising a front clamping tool anchor device and a front clamping jack with a load cell; the front clamping tool anchor device comprises a tool anchor plate, Front push plate, back push plate, front push sleeve, tool clip, back push rod, front push spring and retraction probe rod; the front clamp jack includes jack outer cylinder, jack rear baffle, jack front baffle , a load cell, a limit plate mounting seat and a jack piston; the front clamp tool anchor device is set in the jack piston of the front clamp jack. While saving the steel strands, the present invention can also detect the retraction amount of the tool clip by retracting the probe rod, thereby improving the tensioning effect and the tensioning control precision.

The invention aims to provide a large-dive-depth Kinston valve with small valve opening force. The large-dive-depth Kinston valve comprises a hand wheel, a valve rod, a valve rod power block, a bearing box, a valve body, a valve head and a reinforcement rod mechanism, wherein the hand wheel is connected with the valve rod power block through a spline, the upper portion of the valve rod is sleeved with the valve rod power block, threads on the upper portion of the valve rod are matched with the valve rod power block, the bearing box is arranged outside the valve rod power block, an upper angle thrust bearing and a lower angle thrust bearing are arranged in the bearing box, the valve rod power block is provided with a protrusion, the upper angle thrust bearing is located above the protrusion, the lower angle thrust bearing is located below the protrusion, the bearing box is connected with the valve body, the lower portion of the valve rod is located in the valve body, a valve head cover is arranged in the valve head, the head of the valve rod is located in a cavity formed by the valve head cover and the valve head, and a moving space is formed between the head of the valve rod and the valve head when the head of the valve rod is attached to the valve head cover. According to the large-dive-depth Kinston valve, a two-level reinforcement mechanism is adopted, and the valve opening force is greatly reduced. The seal surface of an end mouth of the valve is protected, and reliability of the valve is enhanced.

The invention discloses an anti-blocking regulating valve, which comprises a valve body, a valve cavity is arranged in the valve body, a valve plate is arranged in the valve cavity, and the valve plate divides the valve cavity into an upper valve cavity and a lower valve cavity , the valve plate is provided with a valve port, and the valve plate is provided with an orifice at the upper end of the valve port; the side of the valve body is provided with an outlet pipe and an inlet pipe; the upper end of the valve body is equipped with a valve cover, A shaft is arranged inside the valve cover, a throttle valve head is provided at the lower end of the shaft rod, a valve rod is connected with internal threads of the shaft rod and the throttle valve head, and a valve block is provided at the lower end of the valve rod; The valve plate is provided with a plurality of valve seat baffles around the orifice along the circumferential direction of the orifice; the valve body is provided with a valve control assembly for controlling the synchronous movement of a plurality of valve seat baffles; the anti-blocking adjustment The valve is not only simple in structure, but also prevents from being blocked.

The invention provides an internal sealing specific pressure-regulable fixed-ball ball valve, which comprises a valve body, a bonnet, a ball, a floating valve seat, valve packing and the like, wherein a plurality of sets of short adjusting screw units are mounted on the sidewall of the bonnet and are connected with a round hole plate, plungers, springs and the floating valve seat in a valve cavity, the sealing specific pressure between the ball and the floating valve seat can be regulated by rotating short screw lifters outside the sidewall of the bonnet, a plurality of sets of long adjusting screw units are mounted on the sidewall of the bonnet as well, and can regulate the sealing specific pressure upon the valve seat packing outside the sidewall of the bonnet, and because of the adoption of the the mechanism, the faults of jam and leakage can be eliminated when the valve is in use. The internal sealing specific pressure-regulable fixed-ball ball valve also comprises an automatic dirt-scraping unit, and thereby having longer operability and sealing property.

The invention relates to a Y-shaped flow channel throttling sleeve. Three layers of throttling sleeve bodies are used, a groove is machined in an inner hole of each layer of throttling sleeve body, a flow distribution hole is machined in the outer diameter of each layer of throttling sleeve body, and machining can be completed by utilizing common machining equipment. A medium plays a role in throttling through an annular groove, then the purpose of damping and controlling the flow speed of fluid movement is achieved through the flow dividing holes, the flow distribution holes in the outer diameters and the grooves of the inner holes are fully and effectively used for combination, and repeated three-layer throttling and pressure reduction are achieved. The Y-shaped flow channel throttling sleeve is suitable for valve components used in high-pressure-drop liquid, steam and gas emptying occasions such as thermal power, chemical engineering and the like, and has the advantages of cavitation resistance, flash evaporation resistance, low noise, low vibration and the like, machining is easy and convenient, the efficiency is high, and the machining cost is greatly reduced.

The invention relates to a high-performance slow-shut check valve which comprises a main valve and a slot-shut mechanism, wherein a swing check valve is adopted as the main valve which is mainly characterized in that one end of a main valve rotating shaft extends out of the valve body and is connected with the slow-shut mechanism; the slow-shut mechanism is of a piston structure and comprises a cylinder body, a cylinder cover, a piston rod, a piston convex disk and a piston concave disk, one end of the piston rod is fixedly connected with the rotating shaft, part of the other end of the piston rod, which is positioned in the cylinder body, is provided with a T-shaped thread, the piston convex disk and the piston concave disk are respectively provided with a positive T-shaped thread and a negative T-shaped thread and meshed with the piston rod, a convex block of the piston convex disk is movably matched with a concave hole of the piston convex disk, and a piston cavity between the piston convex disk and the piston concave disk, a piston cavity between the piston convex disk and the cylinder body, and a piston cavity between the piston convex disk and the cylinder cover are respectively communicated with three port channels of a regulating valve. The high-performance slow-shut check valve has the characteristics of low closing noise, stable slow-shut performance, convenience forinstallation, simple structure and the like, and is suitable for control valves of preventing mediums on outlet pipelines of various pump stations from flowing backwards.

The invention discloses a centering elastic coupling. The centering elastic coupling comprises a piston rod sleeve provided with a piston rod mounting hole, a middle base and a valve rod sleeve provided with a valve rod mounting hole, wherein the middle base is connected to the piston rod sleeve, an elastic part is arranged between the middle base and the piston rod sleeve, the middle base is meshed with the valve rod sleeve through a spherical bulge and a spherical groove, the middle base is connected to the valve rod sleeve, and meanwhile the piston rod mounting hole and the valve rod mounting hole are coaxial; the sphere centers of the spherical bulge and the spherical groove are located on the central axis of the piston rod mounting hole and the central axis of the valve rod mounting hole, and the elastic part stretches out and draws back in the axial direction of the piston rod mounting hole and the axial direction of the valve rod mounting hole. The spherical centering structure solves the problem that the coaxiality of the piston rod and the valve rod of an actuator is not high, and is convenient to install and safe to operate; and an elastic connecting structure can ensure the normal operation of the actuator and protect the sealing surface of the valve seat.

The invention discloses a safety valve, comprising a valve body, the valve body is provided with a valve chamber with an open upper end, the circumferential side of the valve body is provided with an outlet pipe communicating with the valve chamber, and the bottom of the valve body is provided with An inlet pipe communicating with the valve cavity; a main valve seat is provided in the valve cavity; a valve cover is fixedly installed at the upper opening of the valve cavity, and the valve cover is provided with a sleeve extending vertically downward; the A first spring is sleeved on the sleeve; a main control rod is slidably connected to the inside of the sleeve, a vertical chute is provided on the sleeve, and a first A spiral groove, a first boss is provided on the circumferential side of the main control rod; a second spring is provided in the sleeve; a pilot valve assembly is provided in the valve cover; the safety valve is not only simple in structure, but also avoids the main The stuck phenomenon of the spool due to the accumulation of processing errors; at the same time, it can also avoid the collision between the main spool and the main valve seat when opening and closing.

The invention discloses an online cleaning basket filter for a high-concentration formaldehyde pipeline in the production technology of trioxymethylene. The basket filter comprises a basket filter body, a scraping jet cleaner, a hollow cleaning support rod I, a hollow cleaning support rod II, a hand wheel, a transmission rod and a transmission force distribution plate; a sealing cover is arrangedat the upper open end of the basket filter body, the hollow cleaning support rods I and the hollow cleaning support rod II respectively vertically go through the sealing cover and are connected with the scraping jet cleaner, the top ends of the hollow cleaning support rod I and the hollow cleaning support rod II are located at the upper part of the sealing cover and are respectively connected withthe lower end of the transmission rod through the transmission force distribution plate, the upper end of the transmission rod is connected with the hand wheel, and the hand wheel is located at a power support at the upper part of the sealing cover. The basket filter can realize online cleaning at any time without affecting the running of a system, and also can realize closed cleaning in order toeffectively control the pollution of toxic and harmful media to the environment and the occupational health of operators. The basket filter prolongs the overhaul period to one year or above in orderto greatly reduce the workload of the operators.

The invention relates to a soft suspension device for a drilling riser and an operation method thereof. The device comprises the following components: a hydraulic damping system, and a suspension short section system; the hydraulic damping system comprises a hydraulic cylinder and a hollow piston rod assembled in the hydraulic cylinder; the hydraulic cylinder is divided into a rod cavity and a rodless cavity by the hollow piston rod; a cavity is formed in the hollow piston rod; the suspension short section system comprises a suspension short section, a top suspension mechanism and a hinge joint; the hinge joint is assembled at the lower end of the suspension short section and is used for being connected with the drilling riser; and after the suspension short section penetrates through the cavity of the hollow piston rod, the upper end of the suspension short section is connected with the hollow piston rod through the top suspension mechanism. According to the device, the hinge joint is assembled at the lower end of the suspension short section, the hinge joint is composed of two pin shaft universal joints which are perpendicular to each other, 360-degree free rotation in a horizontal plane can be achieved, the drilling riser can rotate around the hinge joint, and the purpose of releasing the bending moment load borne by the drilling riser is achieved.