37results about How to "Achieving a static seal" patented technology

The invention discloses a high-pressure controllable slide-valve type mechanical combined sealing system. The system comprises a controllable slide valve stationary seal assembly and a rotating mechanical seal assembly; the controllable slide valve stationary seal assemble comprises a slide valve gland (13), a slide valve (11) and a tapered shaft sleeve (12) sheathed on a shaft shoulder, the tapered shaft sleeve (12) is positioned inside the slide valve gland (13), the slide valve (11) which is partially positioned in a flange (16) is hermetically connected with the tapered shaft sleeve (12) in a sliding way, and the flange (16) is provided with a pressure source channel I (161) and a pressure source channel II (162) which are respectively used for controlling the slide valve (11) to slide leftwards or slide rightwards; the rotating mechanical seal assembly comprises a rotating seat (9) which is fixedly connected with a shaft sleeve (10), a rotating ring (17) and a stationary ring (7) which are closely jointed on a seal face and the like. The sealing system can help greatly reduce and avoid leakage of dangerous fluid and serious accidents.

The invention relates to the technical field of dynamic sealing devices and discloses a multipoint compression high-temperature-resistant dynamic sealing device. According to the device, a sealing compression ring presses a graphite packing set in the axial direction to enable the graphite packing set to be in close contact with the sealing surface of a fixed body and flexibly fixed to the fixed body through an axial fastening bolt; a spring pressing piece is of a wavy structure, one end of the spring pressing piece is fixed to a radial bolt hole of the sealing compression ring through a radial fastening bolt, the other end of the spring pressing piece is suspended in the air and is in contact with and fixed to the graphite packing set flexibly through a wave trough, and the spring pressing piece presses the graphite packing set tightly and evenly in the radial direction to enable the inner surface of the graphite packing set to be in close contact with the sealing surface of rotary equipment. According to the device, axial static sealing and radial flexible dynamic sealing are achieved for the rotary equipment, and due to the fact that the graphite packing set adopted is good in high temperature resistance, the service life of the sealing device can be prolonged. The device is suitable for large high-temperature rotary equipment and has good market prospects.

The invention discloses a large-diameter large-gap magnetic liquid static seal structure comprising a housing (2), a seal assembly, magnetic liquid and a chassis (12), wherein the housing is made of a nonmagnetic material and is welded and connected with a seal body (1); the seal assembly is arranged in the groove of the housing; the magnetic liquid is filled on the inner ring surface of an annular permanent magnet (6); a gasket (10) is arranged between a chassis and the housing; the chassis, the gasket and the housing are tightly fixed by bolts (11) to ensure the seal gap by adjusting the thickness of the gasket; on the chassis, an inner seal tooth (4) and an outer seal tooth (9) are manufactured; the parameters of the tooth profile of the seal tooth are as follows: tooth width is 1 mm, tooth height is 3 mm, and groove width is 3 mm. The seal assembly is formed by splicing an annular inner pole shoe (5) embedded into an O-shaped seal ring, an annular permanent magnet and an annular outer pole shoe (7) embedded into the O-shaped seal ring in sequence. The invention solves the problem of the static pressure sealing of magnetic liquid of which the seal shaft diameter is more than 300 mm and the seal gap exceeds 1 mm.

The invention discloses a magnetic drive pump for liquefied natural gas delivery, which comprises a center shaft, an internal magnetic rotor, a connection seat and an external magnetic rotor. The internal magnetic rotor and the connection seat surround the center shaft, the external magnetic rotor surrounds the internal magnetic rotor, the internal magnetic rotor is fixedly connected with the center shaft, the connection seat is connected with the center shaft through a first bearing, a spacer sleeve is arranged between the internal magnetic rotor and the external magnetic rotor and is fixedly connected with the connection seat, and a seal gasket is arranged at the joint between the spacer sleeve and the connection seat. Besides, the spacer sleeve and the connection seat are connected fixedly and incapable of moving relative to each other, the seal gasket is arranged at the joint between the spacer sleeve and the connection seat, and then static seal between a pump and a medium can be realized and the pump is safe and reliable in structure, so that the possibility of medium leakage is reduced, unsafe factors generated in delivery process of liquefied natural gas are reduced greatly and safety and reliability of the pump in running are improved. In addition, structures below a mounting platform of the magnetic drive pump can be submerged under liquid level completely, and accordingly heat insulation measures to pipelines when the magnetic drive pump is mounted on the ground and auxiliary cost for the pipeline is lowered.

The invention discloses a supporting mechanism, which comprises a mounting plate, a bearing plate, a connecting piece and a stopper. The connecting piece and the stopper are parallel to each other and connected between the mounting plate and the bearing plate; the connecting piece comprises a connecting post and an elastic element; the upper end of the connecting post is movably connected with the bearing plate, and the lower end of the connecting post is movably connected with the mounting plate; the elastic element is compressively sleeved outside the connecting post; the upper end of the elastic element is pressed against the bearing plate, and the lower end of the elastic element is pressed against the mounting plate; the lower end of the stopper is connected with the mounting plate, and the upper end of the stopper extends along the direction of the bearing plate; and the upper end of the stopper is also provided with a soft cushion pad. The supporting mechanism has the advantages of buffering and damping functions, capability of preventing the bearing plate from being rigidly and mechanically contacted with a borne subject and preventing the borne subject from being damaged, simple structure and convenient maintenance. Moreover, the invention also discloses an automatic elevating device having the supporting mechanism.

The invention relates to a water lubrication deep-water passive dual-end-face stern shaft tube sealing device, which comprises a shell connected with a boat body, and is characterized in that: an inner cavity and an outer cavity are formed in the shell along the axial direction; an end face sealing device is arranged in each cavity, so that two-stages of end face sealing devices are constructed; each end face sealing device comprises a static ring and a movable ring; a static sealing ring is arranged on the outer end face of each static ring; the inner end face of each static ring is hermetically connected with an end cover, and is configured together with a spring arranged on the end face of the end cover; each movable ring is fixedly connected with a stern shaft; a movable sealing ring arranged on the inner end face of each movable ring is configured together with the static sealing ring on the outer end face of the corresponding static ring; water inlets are formed in the inner and outer cavities respectively; and the water inlets of the inner and outer cavities are communicated with a cooling pressure water source respectively. In a normal state, one end face sealing pair of the inner cavity works; when an inner cavity seal fails, one end face sealing pair of the outer cavity takes effect by using the passive physical characteristic of pressure difference, so that the sealing performance of a stern shaft system and the running safety of a submersible vehicle are ensured fully under the condition of deep water.

The invention relates to the technical field of explosion-proof motors, in particular to a magnetofluid sealed positive pressure explosion-proof motor. The motor comprises a shell, a rotor, retainers,a positive pressure system and a protective shell; the rotor is installed in the shell, and the retainers sleeve the outer sides of the two ends of the rotor; a part, located outside the shell, of arotor rotating shaft is fixedly sleeved with a plurality of outer convex rings. The two retainers are embedded into embedding grooves in the two sides of the shell respectively; permanent magnets arearranged in the retainers; the shell is connected with the positive pressure system; the positive pressure system comprises a gas conveying pipe, a gas pressure detector and a protective gas tank; thegas conveying pipe is embedded in the outer wall of the shell; the other end of the gas conveying pipe is communicated with the protective gas tank. By the adoption of the technical scheme, a sealingring and lubricating oil are arranged between the outer end faces of the retainers and the shell in the sealing system, the sealing ring of the sealing system and the shell can achieve static sealing, an outer convex ring and an inner concave ring are matched with each other to form a zigzag dust blocking face, and the dust blocking effect is achieved.

The invention relates to a lifting hook type shot blasting machine, which mainly solves the problems of the existing lifting hook type shot blasting machine that the sealing effect is poor; the workshop environment is polluted; the driving lifting hook rotation is not reliable; automatic control over the workpiece mounting and dismounting cannot be realized. The lifting hook type shot blasting machine is characterized in that a lifting hook comprises an inner lifting hook (3) and an outer lifting hook (4); a slide plate (8) and a sealing baffle plate (9) are sequentially connected onto a piston rod of a first air cylinder (5); the inner lifting hook (3) penetrates through a notch (2) and is positioned in a shot blasting chamber (1); a piston rod of a second air cylinder (7) is connected with a slippage trolley (21); a third air cylinder (22) and a lifting slide plate (23) are arranged on the slippage trolley (21); a piston rod of a fourth air cylinder (24) is connected with the outer lifting hook (4). The lifting hook type shot blasting machine has the advantages that an inner and outer two-group lifting hook mutual bearing structure and a sealing baffle plate structure are used, so that the notch above the shot blasting chamber can be completely covered; the sealing effect is good; the workshop environment is not polluted; the automatic workpiece mounting and dismounting can be realized.

The invention belongs to the technical field of shoe washing machines, and aims at solving the problem that damage to a power mechanism is easily caused due to the lack of a sealing mechanism in an existing shoe washing machine. For this, the invention provides a sealing mechanism used for a shoe washing machine, and the shoe washing machine. The shoe washing machine comprises a fixed member and aslide mechanism arranged on the fixed member in a slide manner, wherein the sealing mechanism is arranged between the slide mechanism and the fixed member, and used for sealing the fixed member. According to the sealing mechanism used for the shoe washing machine, and the shoe washing machine, through the arrangement for the sealing mechanism between the slide mechanism and the fixed member, sealing for the fixed member can be realized, so that in a shoe washing process of the shoe washing machine, splashing water cannot enter into the power mechanism through the fixed member, and then damageto the power mechanism due to dip dyeing of water is avoided; and meanwhile, the drive efficiency and the service life of the power mechanism cannot be influenced.

The invention discloses a chemical mechanical system with a T-type paddle horizontal reactor. A horizontal stirring paddle of a horizontal stirrer is a T-type paddle and is prepared from stainless steel. A distance between the tail end of the T-type paddle and the inner wall of a horizontal tank is in a range of 3-5mm and is larger than the maximum particle diameter of the stirred material. The system comprises the 96 T-type paddles divided into 24 groups uniformly distributed along an axial direction of a horizontal stirring shaft at equal intervals and a ratio of the thickness to length of the T-type paddle is 1: 10. The four T-type paddles in each group are uniformly distributed along the circumferential direction of the horizontal stirring shaft at an angle of 90 degrees. The two adjacent groups of the T-type paddles are arranged at 0 degree along the circumferential direction of the horizontal stirring shaft. The back surface of each T-type paddle is provided with reinforcing ribs.

The invention discloses a chemical mechanical system with a magnetic torque adjustable reactor. A first reactor is an electromagnetic driven reactor with a magnetic torque adjustment function. A stirrer comprises a magnetic driver, a vertical stirring shaft and a vertical stirring paddle. A vertical stirring paddle is arranged on the vertical stirring shaft. The magnetic driver is connected to thevertical stirring shaft and drives the vertical stirring shaft to rotate so that a stirring function is realized.

An automatic cleaning device for a dissolved oxygen sensor, including a power output device, a cleaning device and a sensor connection protection device, characterized in that: the power output device includes a transmission shaft, a self-lubricating ceramic bearing, a protection device-motor compartment connector , magnetic coupling, motor compartment and small DC reduction motor, used to provide power for the cleaning device to wash the dissolved oxygen sensor; one end of the sensor connection protection device is threaded and sealed with the dissolved oxygen sensor, and the other end is threaded and sealed with the power output device. , used to connect the fixed dissolved oxygen sensor and cleaning device to realize automatic cleaning of the dissolved oxygen sensor. The invention is an automatic cleaning device for a dissolved oxygen sensor that can realize automatic cleaning and static sealing, and has the characteristics of maintenance-free, self-lubricating and good stability.

The invention discloses a rotary cylinder piston compressor. The rotary cylinder piston compressor comprises a cylinder sleeve, an upper supporting plate and a valve cover, wherein the upper supporting plate and the valve cover are arranged at the two ends of the cylinder sleeve, a valve plate is arranged on the inner side of the valve cover, a cavity is defined by the valve plate, the cylinder sleeve and the upper supporting plate, a rotating component is arranged in the cavity, a rotating shaft bearing is arranged on the outer side of the valve cover, and a rotating shaft penetrates through the rotating shaft bearing to drive the rotating component to rotate; the rotating component comprises a piston connecting rod, the piston connecting rod is arranged on the air cylinder wall face in a rotary cylinder in a sleeving mode, needle bearings capable of rolling along the inner wall face of the cylinder sleeve are arranged at the two ends of the piston connecting rod, and the rotary cylinder is arranged on the rotating shaft in the sleeving mode; air cylinder end covers are symmetrically arranged on the two sides of the rotary cylinder and provided with air inlet and outlet ports. The rotary cylinder drives the piston connecting rod to rotate relative to the cylinder sleeve, and meanwhile the piston connecting rod reciprocates relative to the rotary cylinder, so that volumes of the two sides of the piston connecting rod in the rotary cylinder are changed, and air suction, compression and exhaust are achieved. According to the rotary cylinder piston compressor, quick-wear parts are reduced, the structure of the compressor is simplified, the overall stress of a piston is small, the operation is stable, and the reliability of the compressor is improved.

The invention discloses a sealing paste, and belongs to the technical field of chemical engineering in order to solve the problem of influence of unable formation of a thick and stable oil film due to poor adhesiveness of present sealing pastes on the sealing performance of devices. The sealing paste comprises a common grease and a copper-based composite powder material uniformly dispersed in the common grease, a mass ratio of the copper-based composite powder material to the common grease is 0.5-20:100, and the particle size of the copper-based composite powder material does not exceed 30[mu]m. The sealing paste can greatly improve the adhesion performance of the sealing paste on the working surface of a machine to form a thick and stable oil film in order to improve the sealing performance.

The invention discloses a mixing chemical mechanical system with a function of multi-sensor monitoring. The mixing chemical mechanical system comprises a master control station and sensors. A master control computer receives signals from the sensors through a sampling circuit, a filter circuit, an amplifier, a holding circuit and an A / D converter. The sensors comprise a rotation speed sensor, a thermometer, a pressure sensor, a vibration sensor and a noise sensor.

The invention discloses a magnetically driven horizontal vortex pump. The magnetically driven horizontal vortex pump comprises a pump housing with a water inlet and a water outlet, a rotor module, a stator module and a driving device, wherein the rotor module comprises a pump shaft which is arranged in the pump housing in a penetrating manner and is provided with two vortex wheels at least; the stator module comprises a pump unit consisting of at least two pump bodies arranged in the axial direction of the pump shaft, annular pump runners and a space transition runner used for communicating all the annular pump runners are arranged on the pump body, and the annular pump runners of the pump bodies at the two ends of the pump unit are respectively communicated with the water inlet and the water outlet of the pump housing; and the driving device is connected with the pump shaft through a magnetic coupling. The vortex pump has the characteristics of small flow and high lift. Through a spacer sleeve, an inner magnetic rotor and a medium are isolated from an outer magnetic rotor, so that full seal is realized. As long as the vortex wheels are increased or reduced according to requirements, the magnetically driven horizontal vortex pump can safely and reliably run so as to meet different water injecting requirements, and the performance range of the vortex pump is enlarged. Due to the adoption of a modular structure, the magnetically driven horizontal vortex pump is convenient to disassemble and maintain and low in use cost.

The invention discloses an underwater camera sealing cabin. The sealed cabin includes a main sealed cabin and a cable fixing sealing module; one end face of the main sealed cabin is a pressure-resistant transparent plate, and the pressure-resistant transparent plate is sealed and connected with the main sealed cabin; An opening is arranged on the end face of the main airtight chamber opposite to the pressure transparent plate; the cable fixing and sealing module includes a sleeve, and the sleeve is sealingly connected with the opening; several sealing chambers are arranged in the sleeve ring, and the sealing ring is in contact with the inner surface of the sleeve; the other end of the sleeve is sealed; both ends of the sleeve are provided with a through hole, the through hole and the The cavities formed by the sealing rings are located on the same straight line and have equal inner diameters. In the present invention, the pressure-resistant transparent plate provided at the front of the main sealed cabin is used for the internal universal camera to observe the external environment; the front end adopts an end face O-shaped sealing ring, and by pressing the O-shaped sealing ring, the static sealing of the front end observation window is realized.

The invention provides a magnetic force driving mechanism for a valve. The mechanism comprises a valve rod, wherein the valve rod is supported in a left-end disc through a bearing; the left-end disc is connected with a right-end disc through a connecting sleeve; an outer magnetic cylinder body which is located inside the connecting sleeve is supported on the right-end disc through a bearing; the inside of the outer magnetic cylinder body is provided with an inner rotor which is installed on the valve rod; an isolation hook which is fixedly connected with the left-end disk is arranged between the inner rotor and the outer magnetic cylinder body; a seal pad is arranged between the isolation hook and the left-end disc; inner magnetic blocks are inlaid on the circumferential surface of the outside of the inner rotor; and outer magnetic blocks matched with the inner magnetic blocks are inlaid on the circumferential surface of the inside of the outer magnetic cylinder body. When the magnetic force driving mechanism is used, the valve rod is connected with the valve core of the valve; the left-end disc is fixedly connected with a mounting seat arranged on a tank body in a system; the inner rotor located on the end head of the valve rod is covered in the isolation hook, thus static seal is achieved; and when the outer magnetic cylinder body is rotated, the inner rotor rotates under the action of the magnetic blocks, so as to realize non-contact type dynamic transfer and no medium leakage, thus the magnetic force driving mechanism provided by the invention is safe and reliable, maintenance frequency is reduced, and production efficiency is improved.

The invention relates to the technical field of dynamic sealing devices and discloses a multipoint compression high-temperature-resistant dynamic sealing device. According to the device, a sealing compression ring presses a graphite packing set in the axial direction to enable the graphite packing set to be in close contact with the sealing surface of a fixed body and flexibly fixed to the fixed body through an axial fastening bolt; a spring pressing piece is of a wavy structure, one end of the spring pressing piece is fixed to a radial bolt hole of the sealing compression ring through a radial fastening bolt, the other end of the spring pressing piece is suspended in the air and is in contact with and fixed to the graphite packing set flexibly through a wave trough, and the spring pressing piece presses the graphite packing set tightly and evenly in the radial direction to enable the inner surface of the graphite packing set to be in close contact with the sealing surface of rotary equipment. According to the device, axial static sealing and radial flexible dynamic sealing are achieved for the rotary equipment, and due to the fact that the graphite packing set adopted is good in high temperature resistance, the service life of the sealing device can be prolonged. The device is suitable for large high-temperature rotary equipment and has good market prospects.

The invention discloses a high-pressure controllable slide-valve type mechanical combined sealing system. The system comprises a controllable slide valve stationary seal assembly and a rotating mechanical seal assembly; the controllable slide valve stationary seal assemble comprises a slide valve gland (13), a slide valve (11) and a tapered shaft sleeve (12) sheathed on a shaft shoulder, the tapered shaft sleeve (12) is positioned inside the slide valve gland (13), the slide valve (11) which is partially positioned in a flange (16) is hermetically connected with the tapered shaft sleeve (12) in a sliding way, and the flange (16) is provided with a pressure source channel I (161) and a pressure source channel II (162) which are respectively used for controlling the slide valve (11) to slide leftwards or slide rightwards; the rotating mechanical seal assembly comprises a rotating seat (9) which is fixedly connected with a shaft sleeve (10), a rotating ring (17) and a stationary ring (7)which are closely jointed on a seal face and the like. The sealing system can help greatly reduce and avoid leakage of dangerous fluid and serious accidents.

The invention discloses a chemical mechanical system with an inner baffle horizontal reactor. The horizontal reactor comprises a horizontal tank, a horizontal agitator and a horizontal jacket. The horizontal jacket is arranged in the middle of the horizontal tank. The horizontal jacket and the horizontal tank form a closed annular sandwich layer. Four baffles are arranged in the horizontal tank, are uniformly arranged at axial positions of the reactor at equal intervals, are semicircular and respectively form angles of 0 degree, 90 degrees, 180 degrees and 270 degrees with the plane. A ratio of the baffle thickness to diameter is 1: 20.

The invention relates to a low heat source magnetic stirring device, which comprises a support, a bearing box, a sealing bucket, a speed reducer and a magnetic transmission device, wherein the speed reducer is connected with a source power motor, an output shaft of the speed reducer is connected with an input shaft, the input shaft is connected with a stirring blade, the magnetic transmission device comprises a drive magnetic rotor and a driven magnetic rotor which are arranged in the support, the drive magnetic rotor is connected with the output shaft, and is coupled with the driven magnetic rotor, an isolation sleeve is arranged between the drive magnetic rotor and the driven magnetic rotor, the driven magnetic rotor is connected with the input shaft, magnetic suction components and magnetic spending components are respectively arranged between the input shaft and the rear end of the bearing box and between the input shaft and the front end of the bearing box, two groups of magnetic slip sleeve components are respectively arranged in the input shaft and an inner cavity of a base body of the bearing box, a magnetic locking component is arranged between the input shaft and the sealing bucket, and a cooling device is respectively connected outside a cavity formed between an inner cavity of the isolation cover, the input shaft and the bearing box and an inner cavity of the sealing bucket. The low heat source magnetic stirring device can effectively improve stirring drive efficiency.

The invention provides a valve sealing gasket for a new energy automobile cooling system. The valve sealing gasket comprises a sealing gasket base body and a PTEF diaphragm framework. A through hole is formed in the middle of the sealing gasket base body in a penetrating mode, the first side face of the sealing gasket base body protrudes outwards to form an inner sealing rib annularly arranged around the through hole, and the second side face of the sealing gasket base body protrudes outwards to form an outer sealing lip annularly arranged around the through hole. The PTEF diaphragm framework is connected with the first side face of the sealing gasket base body and wraps the inner sealing rib. According to the sealing gasket, the rigidity can be effectively reduced, meanwhile, bidirectional self-tightening sealing can be achieved, the sealing effect is guaranteed, meanwhile, the PTEF diaphragm framework wraps the first side face of the sealing gasket base body to make contact with the rotating shaft core, the PTEF diaphragm framework makes direct contact with the rotating shaft core, the abrasion resistance of the sealing gasket is effectively improved, the friction torque is reduced, and the performance requirement of the sealing gasket is met.

The invention relates to a device and method for sealing and locking a water nozzle of a liquid-cooled radiator. A quick connector is arranged at the upper end of a sealing device, a fastening shaft is movably connected with a fixed support seat, a sealing shaft passes through a through hole formed in the middle of the fastening shaft and is connected with a transit joint, and the transit joint is also connected with the quick connector; and by adjusting the position of the fastening shaft on the fixed support seat, the position of the sealing shaft can be limited, the sealing shaft is enabled to prop against the water nozzle of the liquid-cooled radiator by the fastening shaft, and a sealed space is formed between a shaft disc and the liquid-cooled radiator. According to the device and the method, a guide pillar is enabled to prop against the water nozzle by rotating the fastening shaft, and the shaft disc is pressed downwards by a fastening chassis, so that the shaft disc and the liquid-cooled radiator can be sealed in a static state by a gasket in a groove of the shaft disc; and the fastening shaft is prevented from rotating by screwing down a lock nut, so that the sealing shaft is limited and locked by the fastening chassis of the fastening shaft, the shaft disc and the liquid-cooled radiator can be well sealed in the static state by the gasket, and the phenomena of loosening and air leakage are avoided.

The invention discloses a pipe hot air heating box which comprises an inner barrel and an outer barrel. The outer barrel comprises an air inlet barrel section and an air return barrel section. The inner barrel comprises a heating barrel section and a heat preservation barrel section. A through hole is formed in the heating barrel section. An annular contracted conical surface is arranged on the heating barrel section. A heating cavity is formed between the outer side face of the contracted conical surface and the air inlet barrel section. A heating air port is annularly formed in the inner side wall of the heating cavity. A heat preservation cavity is formed between an inner hole of the heat preservation barrel section and a pipe penetrating through the through hole. An air return cavity is formed between the heat preservation barrel section and the air return barrel section. The downstream end of the heat preservation cavity communicates with the air return cavity. The air return cavity communicates with an air return pipe opening. The pipe hot air heating box is reasonable in structure, quite convenient to assemble and disassemble, reliable in heating effect, higher in heat utilization rate and smaller in heat loss. In addition, the invention further discloses a hot air heating device using the hot air heating box, and the hot air heating device has the same effects as the pipe hot air heating box.

The invention relates to a lifting hook type shot blasting machine, which mainly solves the problems of the existing lifting hook type shot blasting machine that the sealing effect is poor; the workshop environment is polluted; the driving lifting hook rotation is not reliable; automatic control over the workpiece mounting and dismounting cannot be realized. The lifting hook type shot blasting machine is characterized in that a lifting hook comprises an inner lifting hook (3) and an outer lifting hook (4); a slide plate (8) and a sealing baffle plate (9) are sequentially connected onto a piston rod of a first air cylinder (5); the inner lifting hook (3) penetrates through a notch (2) and is positioned in a shot blasting chamber (1); a piston rod of a second air cylinder (7) is connected with a slippage trolley (21); a third air cylinder (22) and a lifting slide plate (23) are arranged on the slippage trolley (21); a piston rod of a fourth air cylinder (24) is connected with the outer lifting hook (4). The lifting hook type shot blasting machine has the advantages that an inner and outer two-group lifting hook mutual bearing structure and a sealing baffle plate structure are used, so that the notch above the shot blasting chamber can be completely covered; the sealing effect is good; the workshop environment is not polluted; the automatic workpiece mounting and dismounting can be realized.

The invention discloses a supporting mechanism, which comprises a mounting plate, a bearing plate, a connecting piece and a limiting piece, the connecting piece and the limiting piece are connected between the installing plate and the bearing plate in parallel with each other, and the connecting piece includes a connecting column and an elastic The upper end of the connecting column is movably connected with the bearing plate, the lower end of the connecting column is movably connected with the mounting plate, the elastic element is sleeved outside the connecting column in a compressed form, and the upper end of the elastic element is in conflict with the bearing plate, and the lower end of the elastic element is in contact with the loading plate. The mounting plate conflicts, the lower end of the spacer is connected to the mounting plate, the upper end of the spacer extends along the direction of the load plate, and the upper end of the spacer is also provided with a soft cushion; The hard mechanical contact between the bearing plate and the loaded object prevents the loaded object from being damaged, and the structure is simple and easy to maintain. In addition, the invention also discloses an automatic lifting device with the support mechanism of the invention.

A large-diameter and large-gap magnetic liquid static sealing structure includes a casing (2), a sealing assembly, magnetic liquid and a chassis (12). The shell is made of non-magnetic material, and is welded with the sealing body (1); the sealing assembly is placed in the groove of the shell, and magnetic liquid is injected into the inner ring surface of the annular permanent magnet (6); there is a cushion between the chassis and the shell Gasket (10), fasten the chassis, gasket and shell together with screws (11), and ensure the sealing gap by adjusting the thickness of the gasket; on the chassis, make inner sealing teeth (4) and outer sealing teeth ( 9), the tooth shape parameters of the sealing tooth are: tooth width 1mm, tooth height 3mm, groove width 3mm. The sealing assembly is composed of an annular inner pole shoe (5) embedded in an O-ring seal, an annular permanent magnet and an annular outer pole shoe (7) embedded in an O-ring seal. It solves the static pressure sealing problem of the magnetic liquid with the sealing shaft diameter greater than 300mm and the sealing gap exceeding 1mm.

The invention relates to a microcarrier bioreactor tank inner and outer pipeline channel sealing connection device. The device comprises a hard pipe, a sealing connection seat, a sealing connection sleeve and a compression nut. The hard pipe is fixed on a microcarrier frame in a reaction tank, and one end of the hard pipe penetrates through a top cover of the reaction tank; the top cover is provided with a threaded connector, and the threaded connector is connected with the sealing connecting seat. The sealing connecting sleeve which is inserted on the hard pipe in a sleeving manner is arranged in the sealing connecting seat; the compression nut is pressed on the sealing connecting sleeve; the compression nut is connected with the sealing connecting seat; and sealing rings are arranged in the sealing connecting seat and the sealing connecting sleeve. The internal and external pipelines of a microcarrier bioreactor tank can be conveniently connected in a static sealing mode, and compared with the existing dynamic sealing connection mode, the device is safer and more reliable, and the structure is simpler.