33results about How to "Change friction" patented technology

The invention belongs to the technical field of paper shredders, and particularly relates to a portable paper shredder special for finance, which comprises a double-roller type driving mechanism, synchronous adjusting type cutting mechanisms, a mechanical door opening and closing mechanism and a toggle type spacing adjusting mechanism, and the synchronous adjusting type cutting mechanisms are arranged on the double-roller type driving mechanism in an array. Through the adjustable large wheel assembly and the adjustable small wheel assembly which can adjust the width, the width of paper slips generated through preliminary crushing can be adjusted according to different working condition requirements; an elastic wing plate capable of elastically deforming is used as a bottom plate for secondary cutting, and a first shearing circular ring and a sharp corner cutting part can slide relative to the elastic wing plate when the elastic wing plate is used as the bottom plate for cutting by utilizing different linear speeds caused by different diameters of an adjustable large wheel assembly and an adjustable small wheel assembly; therefore, the paper shearing effect is optimized.

The utility model discloses a woven bag width detection device, which relates to the field of woven bag detection and comprises a first support rod and a second support rod, the first support rod and the second support rod are rotatably connected from the top end position, and the opposite surfaces of the first support rod and the second support rod are fixedly provided with handles. The bottom ends of the first supporting rod and the second supporting rod are rotationally connected with a first measuring foot and a second measuring foot respectively, rhombic pointers are embedded in the lower middle positions of the front surfaces of the first measuring foot and the second measuring foot, and a first measuring scale is fixedly installed at the position, located above the rhombic pointers, of the front portion of the first measuring foot. According to the woven bag width detection device, when the width or the length of a woven bag is measured, the woven bag can be flattened conveniently, the situation that the measurement precision of the woven bag is affected by unevenness factors such as wrinkles and bumps of the woven bag is avoided, the measurement effect is better, the measurement mode is simpler, and the measurement precision is improved. Compared with a traditional direct ruler measurement mode, the device is convenient to use and high in functionality.

The utility model provides an air jet loom supporting and blocking mechanism, which relates to the technical field of air jet loom accessories, and comprises a supporting and blocking seat, a supporting and blocking thorn shaft and a supporting rod, the supporting and blocking thorn shaft comprises a thorn shaft rod, a rubber sleeve and a thorn ring mechanism, and the thorn ring mechanism comprises a thorn ring sleeve, a plurality of thorn ring breast boards and a plurality of thorn rings. The multiple thorn ring breast boards are rotationally connected to the outer side of the thorn ring sleeve in a sleeving mode, the multiple thorn ring breast boards are arranged on the outer side of the thorn ring sleeve in a sleeving mode and arranged between every two adjacent thorn ring breast boards, rotating rods extend from the left side and the right side of the thorn ring sleeve, rotating holes are formed in the two sides of each thorn ring breast board, and the thorn ring breast boards are rotationally connected to the rotating rods. An adjusting gear is fixedly arranged on the inner wall of the thorn ring breast board, an adjusting rack is installed on the outer wall of the thorn ring sleeve in a sliding mode, and the adjusting rack is meshed with the adjusting gear. The barbed ring breast boards can rotate and incline by adjusting the racks, so that the inclination angle of the barbed rings is adjusted, and the external supporting force of the barbed rings on the fabric is changed.

This invention discloses a sesame oil raw material grinding device, comprising: a grinding table, an upper grinding plate, and a lower grinding plate, with a base disposed on the upper surface of the grinding table; an auxiliary grinding assembly, which includes multiple sets of grinding rods and a lifting mechanism; an adjustment assembly, comprising multiple sets of adjustment components arranged in a ring at equal intervals on the outer side of the upper grinding plate, and all sets of adjustment components being drively connected to the lifting mechanism; and a crushing assembly, disposed inside the feed hole, which consists of an opening and closing component and a transmission component. This invention has the advantage that, through the cooperation of multiple sets of grinding rods, crushing heads, and adjustment components, the grinding effect of the upper grinding plate can be adjusted according to different types of sesame raw materials and the required oil yield, thereby effectively improving the practicality of the grinding equipment. Furthermore, the design of the crushing assembly effectively improves the grinding efficiency of the grinding equipment.

The invention discloses an embedded RFID intelligent identification chip tire and a manufacturing method thereof, relates to the technical field of tires, and solves the problems that bar codes on the tire and information of tire side positions are all located on the surface of the tire and possibly abraded in the using process of the tire, and once the information cannot be seen, the information of the tire is lost, so that the tire cannot be damaged. And the friction force between the tire and the road surface cannot be changed according to the condition of the external road surface. The invention relates to an embedded RFID (Radio Frequency Identification Device) intelligent identification chip tire. According to the steel wire seam allowance wrapping cloth, the RFID chip is pasted on the outer surface of the steel wire seam allowance wrapping cloth before a tire is manufactured through the steel wire seam allowance wrapping cloth, after the tire is manufactured through the steel wire seam allowance wrapping cloth, the RFID chip is embedded into the tire, then the tire information of equipment can be read through a special RFID, and the tire information of the equipment can be read through the RFID. And the friction force between the whole high-adaptability chip tire and the road surface can be changed according to different road surface conditions through the high-adaptability chip tire, so that the slipping possibility of the high-adaptability chip tire is reduced.

The present invention discloses a Ferris wheel drive pre-tightening rapid control device and method thereof, which relates to the first field of Ferris wheel drive control, and comprises a mounting frame, the top of the mounting frame is provided with a sleeve rod, the outer side of the sleeve rod is sleeved with a wheel frame, one end of the wheel frame is provided with a track, one side of the wheel frame is provided with an upper box body above the track, and one side of the wheel frame is provided with a lower box body below the track. The present invention provides a pull plate, a round tube, and a sleeve, and when multiple groups of wheel discs of the Ferris wheel need to be urgently pre-tightened, the pull plate is pulled by the round tube, and the bottom end of the pull plate rotates around the second pin shaft, so that the pull plate drives the first pin shaft to rotate around the second pin shaft, and the second pin shaft drives the outer fixed mounting sleeve plate to move, thereby driving the balance cylinder below the mounting sleeve plate to move up and down, thereby changing the pressure inside the balance cylinder, thereby changing the tension in the balance spring, and thereby changing the pressure between the wheel disc and the track.

The application relates to the technical field of coil coating, and discloses a radiation refrigeration coil coating composition, a coating and application, the coating composition comprises a basecoat composition and a topcoat composition which are arranged independently. The basecoat composition comprises polyvinylidene fluoride resin slurry, hydroxy acrylic resin, heat-reflecting filler and blocked polyisocyanate curing agent; the topcoat composition comprises polyvinylidene fluoride resin slurry, hydroxy acrylic resin, heat-emitting filler and topcoat crosslinking agent. The application sets the unblocking starting temperature of the basecoat curing agent to be lower than the starting temperature of the topcoat crosslinking reaction, realizes gradient crosslinking of a multilayer coating film from bottom to top, and solves the exhaust blistering defect during baking of a thick coating film. The glass transition temperature of the multilayer coating body is controlled to be 35 DEG C to 50 DEG C, the deformation requirement of warm stamping processing is met, and the coating film is prevented from cracking.

The invention relates to a cleaning machine which comprises a machine shell and a power assisting wheel. The roughness detector is arranged on the machine shell; the balancing weight is movably arranged on the machine shell; the first driving mechanism is in driving connection with the balancing weight and is used for driving the distance between the balancing weight and the power-assisted wheel; and the control module is in electric signal connection with the roughness detector and the first driving mechanism. According to the cleaning machine, the gravity center of the machine shell can be adjusted based on ground roughness, so that friction force between the power-assisted wheel and the ground is appropriate. The invention further relates to a working method of the cleaning machine. The working method comprises the steps that the ground roughness Ra of the position where the current machine shell is located is detected and obtained based on the roughness detector; according to the ground roughness Ra, the first driving mechanism is controlled to drive the balancing weight, and then the gravity center of the machine shell is adjusted to move forwards and backwards. According to the working method of the cleaning machine, the friction force between the power-assisted wheel and the ground can be adjusted according to the ground roughness, and then the problems that the power-assisted wheel slips and is seriously abraded are solved. The invention further relates to a storage medium.

The utility model discloses an artificial valve retrograde implantation guider for an aortic valve operation, which relates to the technical field of medical instruments and comprises a fixing frame, a sliding block is arranged above the fixing frame, a sliding mechanism is arranged between the sliding block and the fixing frame, a mounting plate is arranged on the sliding block, and the mounting plate is connected with the fixing frame. And a plurality of limiting plates are rotationally mounted on the mounting plate, balls are arranged at one ends of the limiting plates, and limiting blocks are arranged on the limiting plates in a sliding mode. The device is reasonable in design structure, the limiting plate, the mounting plate, the balls, the limiting blocks, the fixing shaft and other components are arranged, and the driving mechanism controls the limiting block component to slide on the limiting plate in the working process, so that one end of the limiting plate component rotates around the fixing shaft, and the other end of the limiting plate component drives the balls to move towards the axis of the mounting plate; therefore, the distance between the ball and the axis is changed, puncture of different sizes is limited, and the effect of widening the application range of the device is achieved.

The present invention discloses an external torque-adjustable angular displacement sensor, wherein the inner end of a rotating shaft passes through a through hole at the front end of a housing from the outside to the inside, and an adjusting nut and an elastic washer which are sequentially mounted on the rotating shaft from the front to the back are both placed outside the front end of the housing, and the adjusting nut is connected to the rotating shaft by a thread, and the outer peripheral edge of the elastic washer and the central hole wall are not in the same plane and form a front end and a rear end respectively, and the front end of the elastic washer contacts the rear end surface of the adjusting nut, and the rear end of the elastic washer contacts the vertical outer wall surface of the front end of the housing. The present invention installs an elastic washer and an adjusting nut on the rotating shaft, and uses the adjusting nut to push the elastic washer to move backward to compress it or move forward to stretch it, thereby changing the friction force at the front and rear ends of the elastic washer, thereby changing the resistance to the rotation of the rotating shaft, and realizing the adjustment and control of the rotation torque (including the starting torque) of the angular displacement sensor, and is suitable for application occasions where there is a need to adjust and control the rotation torque.

The invention relates to the technical field of water body sampling, and discloses a water body stratified sampling device for water quality detection, the water body stratified sampling device comprises a support column, the top of the support column is fixedly connected with a fixing ring, one end, far away from the support column, of the fixing ring is fixedly connected with a shell, and the outer wall of the shell is fixedly connected with a fixing block; the fixing block is fixedly connected with the fixing ring, the end, away from the fixing ring, of the supporting column is rotationally connected with a fixing assembly, a telescopic rod is arranged in the shell and fixedly connected with the top of the shell, and the bottom of the telescopic rod is fixedly connected with a fixing rod. The end, away from the telescopic rod, of the fixing rod is fixedly connected with a connecting rope, and the end, away from the fixing rod, of the connecting rope is fixedly connected with a traction ball, so that water bodies with three different depths can be sampled at the same time, the working efficiency of equipment is improved, the impact resistance of the sampling pipe is improved, and the sampling pipe is prevented from inclining in the sampling process; the sampling precision is improved.

The utility model relates to the field of electrode roll press, concretely relates to a variable diameter floating roller and electrode roll press, and the variable diameter floating roller includes: a roller body, and at least one adjustable diameter contact component is arranged on the roller body and corresponds with the position of the lug area, wherein the adjustable diameter contact component includes: a radial expansion drive mechanism, an elastic ring-shaped bearing beam is sleeved on the outside of the radial expansion drive mechanism, and a rubber composite layer is wrapped around the elastic ring-shaped bearing beam. The embodiment of the utility model realizes the real-time and on-line adjustment of the diameter by controlling the radial expansion drive mechanism, thereby changing the friction or contact pressure of the adjustable diameter contact component and the lug of the pole piece, and further changing the elongation of the lug, and the whole process does not need to stop, and the equipment operation rate is improved.

The utility model belongs to the technical field of maintenance workbenches, and particularly relates to a household appliance maintenance workbench which comprises a first supporting plate. Two pairs of first supporting columns are fixedly connected to the bottom of the outer side wall of the first supporting plate. The outer side wall of the first supporting column is fixedly connected with a fixing box. A second supporting column is slidably connected to the inner side wall of the first supporting column. An operation disc is arranged at the end part of the outer side wall of the first supporting plate; the operation board is rotationally connected with the first supporting plate; a first fixing column is arranged on the side wall of the fixing box; the outer side wall of the first fixing column is fixedly connected with an oval limiting column. A limiting block is arranged on the side wall of the first supporting column and cannot be separated from the first supporting column. The friction force between the second supporting columns and the first supporting columns can be changed through the arranged oval limiting columns and limiting blocks, so that the effect of fixing the second supporting columns is achieved, the situation that due to the fact that the first supporting plates are not flat, objects above the first supporting plates are prone to slipping off is reduced, and the phenomenon that the objects are damaged due to slipping off is reduced.

The utility model relates to the technical field of wear resistance detection, and discloses a wear resistance detection device which comprises a first supporting plate, an optical shaft, a second supporting plate, a third supporting plate, a rotating shaft, a driving piece, a friction block, a first fixing ring and an electric telescopic rod. In the using process, the moving end of the electric telescopic rod is controlled to stretch out, the second supporting plate can be driven to ascend, finally the abrasive disc installed on the rotating shaft is driven to ascend until the abrasive disc abuts against the friction block, the driving piece is controlled to work, the rotating shaft can be driven to rotate, and then the abrasive disc is driven to rotate. Moreover, a balancing weight can be placed on the top face of the third supporting plate to change the pressure value, and then the friction force is changed. In the whole detection process, when the abrasive disc is worn and thinned, the friction block always makes contact with the abrasive disc under the action of gravity, position adjustment is not needed, and the device is simple and convenient to use and facilitates detection.

The present invention provides a spindle for stepless tension adjustment of a braiding machine, comprising: a base, a top cover and a bracket connecting the base and the top cover; a bobbin shaft is installed between the base and the top cover; and a bobbin is sleeved on the bobbin shaft. The spindle for stepless tension adjustment of a braiding machine provided by the present invention can adjust the pressure between friction plates by adjusting the setting of nuts and magnets, thereby changing the friction between the friction plates, and the pulling force needs to overcome the friction force, thereby realizing stepless adjustment of the pulling force.

The application discloses a winding and tensioning equipment for production and processing of scientific veneer, which comprises a traction part, the traction part comprises a machine base, the machine base is rotationally connected with a traction stick through a frame arranged on the top of the machine base, and a winding part, the winding part comprises a rotating stick, the rotating stick is fixedly connected with a rotating shaft through a limiting plate arranged on the outer end of the rotating stick, and the application relates to the technical field of scientific veneer winding. The winding and tensioning equipment for production and processing of scientific veneer can effectively solve the problem that tension adjustment is a very critical step when veneer is wound in the prior art, proper tension can ensure the flatness and curling degree of the veneer, and can avoid wrinkles or loose phenomenon, and general common winding equipment does not have an independent tensioning structure, and can only control the rotating speed of a winding roller motor or a frequency converter to control the winding tension, and thus cannot maintain stable rotating speed, thereby reducing the problems of veneer roll neatness and tightness.

The invention provides a surface treatment device and method for high-pressure valve casting production, and belongs to the technical field of casting surface treatment. Comprising a base body, a control assembly installed on one side of the top of the base body, a grinding mechanism and a fixing mechanism installed on the other side of the top of the base body and used for clamping a casting, and the control assembly is used for controlling the grinding mechanism to move left and right to grind the inner surface of the casting; and the grinding wheel cannot extend into the outlet of the valve rod, so that the grinding consistency is ensured, and the condition of non-uniform grinding or excessive grinding during grinding is avoided.

The invention discloses astronaut training simulation equipment which comprises a hollow base, and a driving mechanism is arranged in the base. The driving mechanism comprises a first shaft, the first shaft is rotationally connected with the base through a bearing in a penetrating mode, the end, located in the base, of the first shaft is fixedly connected with a first gear and a contact wheel in a penetrating mode, the inner top wall of the base is fixedly connected with a driving motor through a support, and an output shaft of the driving motor is fixedly connected with a second shaft; the second shaft is fixedly connected with a second gear in a penetrating mode, the second gear is meshed with the first gear, a first sliding sleeve is fixedly connected to the side wall of the base in a penetrating mode, a piston is slidably connected into the first sliding sleeve in a sealed mode, and an electric push rod is fixedly connected to the side wall of the base through a support. The training simulation equipment has the advantages that the simulation degree of the training simulation equipment is higher, the training environment of astronauts can be closer to the actual situation, and therefore the better training effect is achieved.

The present invention provides a motion execution system and method based on negative pressure and friction. The system is based on the prior art self-sufficient device (100) and adds guide posts (200), friction parts (300), limit blocks (400) and other components. The friction between the friction parts (300) and the guide posts (200) is controlled to realize the movement of the linkage rod (130). The system realizes the process of changing from accelerated motion to uniform, accelerated or decelerated motion by increasing friction or active friction to balance the negative pressure that always exists, thereby satisfying the uniform or controllable feed force to achieve the purpose of controlling the speed of output liquid or gas, fluid metering, etc. The system can be applied to various devices such as thrust actuators, syringes, reciprocating motion devices, and injection pumps, and overcomes the previous method of changing the structure and components of the device by changing the diameter of the negative pressure tube or increasing or decreasing the number of negative pressure tubes to control the motion execution performance. A set of devices can form multiple execution behaviors.

The utility model provides a centrifugal hatch cover capable of being closed safely, which relates to the technical field of medical instruments and comprises a fixing part, a cover body and a cover body. The damping piece is U-shaped on the whole and is provided with a rotating cavity; the damping piece is fixedly connected to the upper end of the fixing piece; the damping piece is provided with a mounting hole, and the mounting hole is aligned with the mounting screw hole of the fixing piece; the damping piece has elasticity; the adjusting screw penetrates through the mounting hole of the damping piece and is connected with the mounting screw hole of the fixing piece through a thread; the connecting shaft is inserted into the rotating cavity of the damping part, and when the adjusting screw rotates in the mounting screw hole, the adjusting screw is screwed in / out along the central axis of the mounting screw hole; and when the adjusting screw is screwed in / out, the damping piece is compressed / released, and the friction force between the damping piece and the connecting shaft is increased / reduced, so that the problems that the whole centrifugal hatch cover has relatively large weight, the hatch cover needs to be controlled by relatively large force when the centrifugal hatch cover is opened and closed, and a user is easily injured by pressing or squeezing due to unstable control are solved.

The sesame oil raw material grinding device comprises a grinding table, an upper grinding plate and a lower grinding plate, and a base is arranged on the upper surface of the grinding table; the auxiliary grinding assembly comprises a plurality of groups of grinding rods and a lifting mechanism; the multiple sets of adjusting assemblies are annularly arranged on the outer side of the upper grinding plate at equal intervals, and the multiple sets of adjusting assemblies are all in transmission connection with the lifting mechanism; and the crushing assembly is arranged in the feeding hole, and the crushing assembly is composed of an opening and closing component and a transmission component. According to the sesame raw material grinding device, through mutual cooperation of multiple sets of grinding rods, smashing heads and adjusting assemblies, the grinding effect of the upper grinding plate can be correspondingly selected and changed according to different kinds of sesame raw materials and the requirement for the oil outlet amount of the sesame raw materials, and therefore the practicability of the grinding device is effectively improved; and the grinding efficiency of the grinding equipment can be effectively improved.

The utility model provides a tension adjusting device of a steel belt winding packer, and relates to the field of winding packers. The tension adjusting device of the steel belt winding packer comprises a bearing frame, a sliding groove is formed in the left side of the top of the bearing frame, a sliding block is slidably connected into the sliding groove, a supporting spring is fixedly connected to the position, located above the sliding block, in the sliding groove, clamping rollers are rotationally connected to the front end of the sliding block and the front end of the bearing frame, and a discharging rod is rotationally connected to the axis position of the bearing frame. The outer surface of the front end of the discharging rod is fixedly connected with a baffle, and the rear end of the discharging rod is fixedly connected with a limiting wheel behind the bearing frame. When the tension adjusting device of the steel belt winding packer is used, the servo motor drives the adjusting rod to rotate, the adjusting rod drives the moving plate to move, the moving plate drives the friction block to move, and the friction block makes contact with the contact disc under the action of the buffer spring, so that the friction force between the friction block and the contact disc is changed, and then the tension of a binding belt is changed; and the tension is convenient to adjust.

The present invention discloses a built-in torque-adjustable angular displacement sensor, wherein the inner end of a horizontal rotating shaft passes through a through hole at the front end of a shell from the outside to the inside and is connected to a collector ring assembly, and an elastic washer and an adjusting nut which are sequentially mounted on the rotating shaft from the front to the back are both placed in the inner cavity of the shell and between the front inner wall of the shell and the collector ring assembly, and the adjusting nut is connected to the rotating shaft by a thread, and the front end of the elastic washer contacts the vertical inner wall surface at the front end of the shell, and the rear end of the elastic washer contacts the front end surface of the adjusting nut. The present invention installs an elastic washer and an adjusting nut on the rotating shaft, and uses the adjusting nut to push the elastic washer forward to compress it or backward to stretch it, thereby changing the friction force at the front and rear ends of the elastic washer, thereby changing the resistance to the rotation of the rotating shaft, and realizing the adjustment and control of the rotation torque (including the starting torque) of the angular displacement sensor, and is suitable for application occasions where there is a need to adjust and control the rotation torque.

The utility model relates to a vehicle door electric driving device with an adjustable internal resistance and a vehicle. The vehicle door electric driving device comprises a shell, a driving device and a driving device, wherein the shell is used for being installed on a vehicle door; the push rod is movably arranged in the shell in the axial direction, and the tail end of the push rod extends out of the shell and is connected to a vehicle body; the driving assembly is used for driving the push rod to move so as to realize opening and closing of a vehicle door, and the driving assembly is mounted in the shell; the adjusting assembly is used for applying a jacking force in the radial direction of the push rod and balancing resistance fluctuation borne by the push rod by adjusting the magnitude of the jacking force, and the adjusting assembly is installed in the shell. The elastic force acts on the surface of the push rod through the pushing part to generate pressure, the friction force between the pushing part and the push rod can be changed through the pressure, and therefore the friction resistance borne by the push rod is adjusted through screwing-in and screwing-out of the threaded shaft, and fluctuation of resistance of other components can be compensated by changing the friction resistance of the push rod through the threaded shaft. And finally, the resistance of the electric driving device keeps small fluctuation.

The utility model provides a torsion hinge convenient to install and long in service life, which comprises a first bushing, a second bushing and a pin shaft, installation blades are fixed on one side of the first bushing and one side of the second bushing, installation holes are arranged on the surfaces of the installation blades, a check block is fixed at one end of the pin shaft, and external threads are arranged at the other end of the pin shaft. A threaded sleeve is installed on the pin shaft in a threaded mode, a damping sleeve is arranged between the first lining and the second lining and arranged on the pin shaft in a sleeving mode, a damping ring plate is arranged at one end of the threaded sleeve, a damping groove is formed in the surface of the second lining, the damping ring plate is inserted into the damping groove, and the damping ring plate is sleeved with the damping groove. The torsion hinge structure solves the problems that when an existing torsion hinge structure is assembled and used, only torsion can be adjusted to be small, the torsion cannot be adjusted to be large, and therefore using limitation is large, and using is inconvenient.

The utility model discloses a kind of quick paper feeding devices of paper folding machine, belong to paper folding machine technical field.A kind of quick paper feeding devices of paper folding machine, including the top fixed installation of rack belt conveyor, paper feeding roller is installed on rack, further include: at least two baffle, setting on rack, first adjusting part is equipped on belt conveyor, first adjusting part is used to drive two baffle to be mutually close and away;At least two guide plates are arranged in the middle part of rack, and the bottom end of guide plate is arc design;The utility model can flexibly adjust the support position of cushion block by rotating hand wheel, and change the friction between paper and belt conveyor conveyor belt, and then the suitable friction required by different types of paper can be flexibly set, so that the device can stably, reliably transmit various types of paper, greatly reduce the probability of occurrence of double paper feeding or empty paper condition, help to improve the continuity and stability of paper feeding.

The invention discloses a high-rise escape device, comprising a columnar main body system, a left handle assembly, a gravity system, a right handle assembly and a life jacket system. The left side of the columnar main body system is provided with a left handle assembly, a gear assembly in the left handle assembly is meshed with a rotatable adjustable gear in the columnar main body system, the right side of the columnar main body system is provided with a right handle assembly, the right handle assembly is connected to a connecting column in the columnar main body system through a connecting block, a gravity system is provided at the lower end of the columnar main body system, a life jacket system is provided at the lower end of the gravity system, the life jacket system is connected to a gravity main cylinder in the gravity system through a safety rope, and a fire-resistant layer is provided on the outer surface of each component of the escape device, according to the different weights of the escapee, the spring generates the most suitable friction force for the escapee on the gravity pressure device, the friction force of the rope is controlled by the left handle assembly and the right handle assembly, so that the escapee descends safely.

The invention relates to the technical field of needle valves, and discloses a high-temperature and high-pressure double-sealing and double-adjusting needle valve which comprises a valve body and a valve rod assembly, a feeding channel, a discharging channel and a communicating cavity are formed in the valve body, the inner end of the feeding channel is divided into an upper channel and a lower channel, the upper channel is communicated to the bottom face of the communicating cavity located on the upper portion of the valve body, and the lower channel is communicated to the bottom face of the communicating cavity located on the lower portion of the valve body. The valve rod assembly comprises an inner valve rod, the inner valve rod is arranged in the valve body in a sliding mode in the axial direction of the inner valve rod, the inner end of the inner valve rod penetrates into the communicating cavity and abuts against the communicating position of the feeding channel and the communicating cavity, and a fixed sealing assembly is arranged between the valve rod assembly and the valve body. The fixed sealing assembly comprises packing rings and a packing gland, and the multiple packing rings are arranged in a stacked mode. The problem that an existing needle valve is prone to abrasion and leakage can be solved or at least relieved, and the sealing performance of the high-temperature and high-pressure double-sealing and double-adjusting needle valve is enhanced.