40results about How to "Easy disassembly and maintenance" patented technology

The invention discloses a variable hydraulic damping torsion vibration reduction device which comprises a flange plate, a torsion vibration reduction assembly and an end cover. The flange plate and the end cover are arranged on the two sides of an annular shell respectively and are connected with the annular shell through screws to form an overall rotary component. The torsion vibration reduction assembly comprises a shaft coupling barrel, connecting rods, piston push rods, hydraulic cylinders and adjusting screws. The shaft coupling barrel is connected with a driving rotary shaft, the driving rotary shaft drives the shaft coupling barrel to rotate, the piston push rods are driven to rotate through the connecting rods, the piston push rods compress vibration reduction springs, and extrude hydraulic oil, the hydraulic oil is made to pass through oil channels in the piston push rods and flow to the other hydraulic cylinder, the adjusting screws capable of adjusting the flow of the hydraulic oil are arranged on the piston push rods, and therefore the function of variable hydraulic damping torsion vibration reduction is achieved. The variable hydraulic damping torsion vibration reduction device is simple in structure, convenient to dismount, mount and maintain, capable of achieving the function of variable hydraulic damping torsion vibration reduction and good in torsion vibration reduction effect.

The invention provides a driving system of a rim and the driving system is installed inside the rim so as to drive or brake the rim. The system comprises a motor system within wheels, a two-piece rim, a wheel cover which does not rotate and is in a static state, and a braking device, wherein the motor system within the wheels comprises a ring-shaped rotor, an inner wheel bearing, an outer wheel bearing, a ring-shaped stator, an inner ring-shaped knuckle, an outer ring-shaped knuckle, a motor connector set, an inverter connector set and a ring-shaped inverter. The two-piece rim comprises a main rim and an outer rim. The braking device comprises a ring-shaped braking disc and braking calibers. The two-piece rim which is assembled with a rotor bracket has a groove depth which is bigger than that of a standard rim, the thin-wall wheel bearing with a long diameter, the ring-shaped knuckle with large inside space, the static wheel cover without rotation and the ring-shaped inverter fixed on the axial outer side of the outer ring-shaped knuckle. The system has the advantages of being convenient to assemble and maintain, improving comfort and driving safety of a car and improving dynamic characteristic of the car.

The invention discloses a detachable monitoring dome camera, which relates to the technical field of monitoring devices and solves a problem of inconvenience in mounting and detaching of the existingdome cameras. The detachable monitoring dome camera comprises a protective cover and a camera head in the protective cover, an upper part of the protective cover is sleeved with an outer cover of which a top end is provided with a mounting hole, a mounting tube with an internal thread is arranged on the mounting hole, an external wall of the protective cover is sleeved with a ring-shaped guide groove, a bottom end of the outer cover is provided with a plurality of through holes, a support rod is arranged in the through hole, one end of the support rod is provided with an idler wheel cooperating with the ring-shaped guide groove, the other end of the support rod stretches out the outer cover via the through holes, a limit fixing mechanism cooperating with the tail end of the support rod isarranged on the external wall of the outer cover, mounting and detaching can be convenient through cooperation of the internal thread and an upright tube with an external thread, meanwhile, stretchingout and drawing back of the support rod are realized by cooperation of the support rod and the limit fixing mechanism, the protective cover and the outer cover can be separated and detached, and overhauling for the camera is facilitated further.

The invention discloses a wire-passing structure for a small flow rate center flow-concentrating flowmeter of an oil field. The wire-passing structure comprises a main body for installing an electromagnetic flowmeter, and the main body is internally provided with a water passing hole penetrating the upper and lower end faces. A water outlet communicating with the water passing hole is formed in the side wall, close to the lower end of the water passing hole, of the main body, and a wire-passing steel pipe penetrating through the upper and lower ends of the water passing hole and used for threading is arranged in the water passing hole in a sleeved mode. An annular liquid flow passage is formed between the outer wall of the wire-passing steel pipe and the inner wall of the water passing hole. The outer walls of the upper and lower ends of the wire-passing steel pipe are separated from the liquid flow passage through a sealing structure. According to the wire-passing structure for the flowmeter, the wire-passing steel pipe is adopted to pass through a high-pressure zone in the water passing hole, and then an electric wire passes through the wire-passing steel pipe to divide the outerand inner space of the wire-passing steel pipe into high and low pressure zones, so that it is realized that the space is divided and a wire-passing passage is stable and strong, and the wire is notdirectly subjected to pressure bearing. The wire-passing steel pipe is installed once, the electric wire can be threaded for multiple times without damage, and the wire-passing structure is easy to disassemble and assemble and convenient to maintain.

The invention relates to a display device, in particular to a rotary display device for artware sales. The display device comprises a barrel, a central shaft is connected to the middle of the bottom of the barrel through a bolt, a driving mechanism is arranged on the outer wall of the central shaft, a rotary display stand is connected to the top of the central shaft through a bolt, the middle position of the top of the rotary display stand is connected with a central display stand through bolts, the cross section of the central display stand is of a ladder stand type structure, a first storage groove is formed in the middle position of the top of the central display stand, second storage grooves which are circularly distributed at equal intervals are formed in the top of the central display stand, and through holes which are circularly distributed at equal intervals are formed in the top of the rotary display stand. According to the multi-layer rotary display device for artware sales, a multi-layer rotary display structure for artware sales is formed, so that the storage hopper is subjected to auto-rotation treatment in the rotating process, a sufficient dynamic effect is achieved, a multi-angle rotation adjusting effect is achieved, and the whole display device has the effect that artware is displayed and stored at the same time.

The invention discloses a wall-mounted elevator fire-fighting box. The wall-mounted elevator fire-fighting box comprises a wall-mounted plate and a box body arranged on the outer side of the wall-mounted plate in a covering mode. The upper end of the wall-mounted plate is bent towards the box body, so that an upper bent edge is formed. The lower end of the wall-mounted plate is bent towards the box body, so that a lower bent edge is formed. The box body comprises a bottom plate, primary bent edges which are bent corresponding to the four edges of the bottom plate, and a secondary bent edge which is bent downwards corresponding to the primary bent edge on the upper portion of the bottom plate. The secondary bent edge abuts against the outer side face of the lower bent edge, so that the boxbody is hung on the wall-mounted plate. A surface plate is inlaid in the bottom plate. A window is arranged on the surface plate. A transparent cover is arranged on the window in a covering mode. A fire-fighting switch is arranged in the transparent cover. The wall-mounted elevator fire-fighting box can be formed without a complex process and has the advantages of being simple in structure, smallin product thickness, low in manufacturing cost, convenient to install and maintain, and the like.

The invention relates to a cooling and filtering structure of an engine oil pump. The cooling and filtering structure comprises an oil outlet pipe, a cooler assembly, an oil duct, a filter, an oil return pipe and an accessory enamel; the cooler assembly is fixedly mounted on a side plane of the accessory enamel; the filter is mounted on a top plane of the accessory enamel; one end of the oil outlet pipe is upwards and slantwise connected to the cooler assembly, and the cooler assembly is connected with the filter through the oil duct; the oil return pipe is connected to the filter. The cooling and filtering structure of the engine oil pump has the advantages that a quality fault of engine oil pollution produced by possible leakage of the cooler assembly is avoided, the mounting efficiency and the assembly quality are improved, mounting, demounting and maintenance are enabled to become more convenient, the safety and reliability of an engine lubrication system are improved and the service life of the system is prolonged; further, due to an inside and outside temperature difference, water vapor easily gathers on the oil outlet pipe and prone to enter the cooler assembly, and therefore, the oil outlet pipe is arranged in an inclined form, such that the water vapor is led to a portion relatively far away from the cooler assembly along the inclined pipe to be discharged without entering the cooler assembly.

The invention relates to the field of display support assemblies, and provides a detachable support assembly. The detachable support assembly comprises a power line, a first connector, a support and abase, wherein the support comprises a support shell with a containing cavity, and a frame core component. A first opening is formed in the bottom end of the containing cavity. The frame core component comprises a component body and a plug-in part, the component part is fixed in the containing cavity, the plug-in part is used for being detachably connected with the base, and the plug-in part covers the first opening. A first connector is disposed at one end of the power line and electrically connected with the first connector, a first containing groove for containing the power line is formed in the component body, and a second containing groove allowing the first connector to be placed in is formed in the inserting portion. The base comprises a base shell, and a wireless charging emittingdevice used for being electrically connected with the first connector is fixed inside the base shell, and a first notch allowing the inserting and connecting part to extend into the internal space isformed in the base shell. The structure enables a display support to be detachably connected with the base with a wireless charging function, and the neatness degree of the periphery of the display isimproved by arranging a wiring mode.

The invention discloses an infrared monitoring device mounting shell. The infrared monitoring device mounting shell comprises a monitoring shell body; the monitoring shell body is provided with a dustproof cover near the top of the monitoring shell body; the dustproof cover is connected onto the monitoring shell body in a sealed manner; two sides of the dustproof cover are respectively provided with two protective plates; the protective plates are fixed to the dustproof cover and the dustproof cover; the front side surface of the monitoring shell body is provided with a liquid crystal display panel; the liquid crystal display panel is arranged on the monitoring shell body in an embedded manner; the inner side surface of the monitoring shell body is provided with an infrared scanning device corresponding to the liquid crystal display panel; and the front side surface of the monitoring shell body is also provided with a switch for controlling the working of the infrared scanning device. The infrared mounting device mounting shell of the invention has strong anti-collision capability and is convenient to disassemble and maintain; and the infrared mounting device mounting shell has a good dustproof effect, and therefore, dust accumulation can be prevented, and the problem of deterioration of the performance of an internal structure caused by dust accumulation can be solved; and an infrared scanning function can be better utilized to aid better monitoring, overall practicability can be increased, and the service life of the shell can be greatly prolonged.

A slide way for escalators relates to the technical field of elevators. The slide way is characterized in that: guide plates are respectively arranged in the same direction on both sides of a bottom plate in the length direction, and extension parts are oppositely arranged on the ends of the guide plates, which are far from the bottom plate. The bottom plate of the slide way is provided with a fixing hole which is 14mm in diameter, and the guide plates of the slide way are respectively provided with a fixing hole which is 10mm in diameter. The fixing holes of the slide way are symmetrically arranged. The slide way can prolong the service life of an elevator, is easy to mount, and can ensure that steps can be kept on the same horizontal plane.

An embodiment of the invention provides a consumable box for use in a medical waste collecting device. The consumable box comprises a casing including a first consumable box inner cavity and a secondconsumable box inner cavity; a first mounting joint disposed in the casing and in communication with the first consumable box inner cavity and used for being connected to a first mounting base of themedical waste collecting device to simultaneously connect a vacuum source and a waste collecting tank of the medical waste collecting device; a connecting base assembled to the casing and communicatedwith the second consumable box inner cavity for connecting an external suction line; a second mounting joint located on the casing and in communication with the second consumable box inner cavity andused for being connected with the medical waste collecting device to allow the waste to enter the waste collecting tank. The consumable box can effectively isolate the waste in the waste collecting tank from a vacuum source.

The desilting device for the water conservancy project comprises a frame body, a first rectangular cavity is formed in the frame body, a first rectangular through opening is formed in the front end of the upper surface of the frame body, the first rectangular through opening communicates with the first rectangular cavity, and a second U-shaped plate is fixedly connected to the rear end of the frame body; the desilting device comprises a frame body, a first circular through opening is formed in the upper end of the front surface of the frame body, a third circular through opening is formed in the lower portion of a second rectangular cavity, an electric telescopic suction cylinder is fixedly connected to the inner wall of the third circular through opening, and a suction motor is placed at the upper end of the electric telescopic suction cylinder; the side surface of the suction motor is fixedly connected with two first straight rods, and the opposite faces of the two first straight rods are fixedly connected with the inner wall of the second rectangular cavity. The suction motor can suck a sludge soil layer, the device is simple, and subsequent disassembly and maintenance are facilitated.

The magnetic attraction type building decoration panel and modular multifunctional integrated base plate comprises a decoration frame, a base plate is installed on the back face of the decoration frame, a decoration panel is installed on the front face of the decoration frame, bottom plates arranged at equal intervals are installed on the rear wall of the base plate, and line pipe clamping groove blocks are installed on the front faces of the bottom plates. A bottom box arranged in a 3 * 3 mode is installed on the rear wall of the base layer plate, a multifunctional leveling bolt is connected into the bottom box, the interior of the multifunctional leveling bolt is designed to be hollow, an inspection module is installed on the outer wall of the bottom box, and an isolation module is installed on the back face of the base layer plate. By arranging the line pipe clamping groove block, the decoration panel and the multifunctional leveling bolt, the construction scheme of leveling, wiring and fixing the decoration panel is achieved at a time, and the construction cost and the later maintenance difficulty are greatly reduced.

The invention relates to the technical field of experimental devices, and more specifically, relates to a solvent exchange system. The solvent exchange system comprises a solvent exchange tank, a rawsolvent tank and a waste liquid tank, and further comprises a first peristaltic pump and a second peristaltic pump; the first peristaltic pump is connected with the solvent exchange tank and the raw solvent tank; and the second peristaltic pump is connected with the raw solvent tank and the waste liquid tank. The solvent exchange system has the advantages of being automatic in solvent exchange process, being labor-saving and time-saving, and improving the efficiency.

The invention discloses an intelligent man-machine interaction high-pitch early warning system based on a high-voltage line, which comprises a sound box with a built-in high-pitch early warning system, a solar panel is arranged above the sound box, a mounting rod is arranged on the right side of the sound box, a storage battery is fixedly connected to the top of the left side of the mounting rod, and an inverter is fixedly and electrically connected to the top of the storage battery. The inverter is electrically connected with the solar panel, the bottom of the solar panel is fixedly connected with an inclined protection plate, and the bottom of the protection plate is fixedly connected with an elastic guide mechanism. According to the invention, the falling impact force of an object at a high position can be conveniently relieved, the risk that the object at the high position crushes the sound equipment can be effectively reduced by arranging the protection plate, and the protection box is matched with the dustproof net to shield and prevent dust from the sound equipment, so that the phenomenon that dust enters the sound equipment can be effectively reduced; the height of the sound box can be rapidly reduced, fixation of the sound box can be synchronously and automatically relieved, the dismounting efficiency is improved, potential safety hazards are reduced, and convenience is provided for later dismounting and maintenance operation.

The invention discloses a novel dry type transformer tank body. The novel dry type transformer tank body comprises a transformer assembly and a tank body, wherein the transformer assembly is arranged inside the tank body; the tank body comprises a plurality of supporting rods and a plurality of overturning plates; the supporting rods are connected into a tank rack through connectors in an interference fit manner; the overturning plates are arranged on the tank rack; and ventilation holes and an observation window are formed in each overturning plate. The novel dry type transformer tank body has the advantages that the novel dry type transformer tank body is simple in structure, quick in mounting and dismounting, convenient in operation, firm in installation, high in stability, high in safety and reliability, good in dissipation effect, good in sound absorption effect and good in noise reduction effect, and is beneficial for later maintenance; and moreover, the novel dry type transformer tank body is applicable for different types of transformers, and is wide in application range and long in service life, so that the production cost is reduced.

The invention discloses a chain type decoration structure, the chain type decoration structure is applied to a building peripheral structure and installed on the side, close to a building body, of the building peripheral structure, the chain type decoration structure comprises a guide assembly and a chain type decoration assembly, the guide assembly is provided with a guide groove and a disassembly and assembly window communicating with the guide groove, and the chain type decoration assembly is installed on the chain type decoration assembly. The disassembly and assembly window is arranged towards the building main body; the chain type decoration assembly is movably arranged in the guide groove and can move along the guide groove, and the chain type decoration assembly can be installed in or separated from the guide groove through the disassembly and assembly window. The problems that a decoration structure is complex, decoration parts are scattered, and disassembly, assembly and maintenance are difficult are solved.

The invention discloses a new energy battery mounting rack and a mounting method thereof. The new energy battery mounting rack comprises a fixed frame, first supporting legs are fixedly mounted at thefour corners of the bottom end of the fixed frame correspondingly, connecting plates are mounted at the bottom ends of the four first supporting legs through movable pins, and second supporting legsare fixedly connected to the inner sides of the two connecting plates; two handles are fixedly installed on the two sides of the top of the fixing frame respectively, installing frames are fixedly installed on the two sides of the bottom end of the fixing frame, one sides of the bottom ends of the two installing frames are fixedly connected with the two sides of the bottom of the top end of the fixing frame through two connecting rods, and two installing plates are fixedly installed on the two sides of one end of the top of the fixing frame. According to the new energy battery mounting rack, the new energy battery frame can be conveniently fixed through the arranged mounting frame, the stability of a new energy battery in the battery placement frame is prevented from being improved in thedriving process of a new energy vehicle, the battery fixing frame can be conveniently fastened through the arranged two mounting plates, and a maintainer can conveniently disassemble and maintain thenew energy battery.

The invention discloses a flue purification device modular layout method, and belongs to the field of energy conservation and environmental protection. Box body modules are arranged in a tail flue, the tail flue comprises a vertical flue and a horizontal flue, the horizontal flue part or the vertical flue part is selected at the tail flue to arrange the box body module, and elbows, reducers and special-shaped pipelines are avoided. The size of the box body modules is designed according to bearing, and meanwhile the smoke amount is considered. Considering the expansion of a box body, the flow field at an inlet is not influenced, and the box body modules can be connected in an arc-shaped, inferior arc-shaped, triangular and other modes. A supporting module is arranged in each box body module, a purification module is placed in each supporting module, the purification modules adopt a cylindrical tube bundle type structure, one, two or four cylindrical tube bundle type structures form a purification unit, and each purification unit can be relatively independently disassembled or assembled in the corresponding supporting module. Uniform flowing of airflow in a flue is facilitated, and generation of vortexes is reduced.

The invention discloses an all-solid-state VTS radar radome installation method. The method comprises the following concrete steps that S1) a type is selected; S2) air inlet and outlet channels are designed; S3) anticorrosion processing is carried out; S4) an installation place is designed; S5) an assembling tool system is designed; S5) the radome attitude is adjusted; S7) an interface tool is adjusted; S8) a radome body is bored; S9) the profile and hole surface of the radome body are processed; S10) a metal strip and the radome are installed; S11) disengaging is carried out; S12) supplementary boring is carried out; and S13) packaging is carried out. The interface tool serves as a reference, installation steps are simplified, the radome body is divided into upper, lower and front covers,convenience is provided for dismounting and maintenance as well as design and processing of the radome body, the manufacture cost is reduced, the air inlet and outlet channels are reserved in the bottom surface of the lower cover and the side surface of the front cover to provide convenience for heat radiation, the profile and hole surface of the radome body are finished to ensure the installation precision, and the method also has advantages of reasonable design and safe and practical use and can be used and popularized widely.

The invention discloses a combined YP18 packaging box case side face suction connection rod mechanism which comprises a first movable connection rod and a second movable connection rod, and the firstmovable connection rod and the second movable connection rod are horizontally arranged side by side. A first rotary shaft, a second rotary shaft and a third rotary shaft are rotationally connected between the first movable connection rod and the second movable connection rod in sequence from the right end to the left end. The first rotary shaft is fixedly provided with a driving gear, and the second rotary shaft is fixedly provided with a driven gear engaged with the driving gear. The second rotary shaft is fixedly provided with a vertically arranged first swinging arm. The third rotary shaftis fixedly provided with a vertically arranged second swinging arm. The free ends of the first swinging arm and the second swinging arm are hinged to a horizontal arm. The left end of the horizontal arm is rotationally connected with a fourth rotary shaft which is arranged in the front-back direction. The fourth rotary shaft is fixedly provided with a side suction cup and a short swinging arm. A short horizontal arm is hinged between the bottom end of the short swinging arm and the middle of the second swinging arm. The overall structure is simple, machining is easy, the machining cost is low,and occurrence of the phenomenon of fracture of a single connection arm is avoided.

The invention relates to a memory and a detection method for preventing information loss of the memory, the memory comprises a memory body, an inner frame is mounted in the memory body, memory chip fixing plates are mounted on two sides of the inner frame, and memory chips and electromagnetic lock boxes are mounted on the memory chip fixing plates; a first cooling fan box is mounted at the bottom of the memory body, and a second cooling fan box is mounted on the side surface of the memory body; the top of the memory body is connected with a memory sealing cover, the top of the memory sealing cover is provided with a third heat dissipation fan box, the bottom of the memory sealing cover is provided with an electromagnetic bolt, the electromagnetic bolt is matched and connected with the electromagnetic lock box, the memory sealing cover is provided with a power switch, and the power switch is connected with the electromagnetic lock box. According to the invention, rapid dismounting and maintenance of the memory are realized, internal high temperature of the memory is rapidly discharged, the service life is prolonged, and information loss in the memory is effectively prevented.

The invention relates to a bidirectional illumination lamp. The bidirectional illumination lamp comprises a shell, a fan and two light source devices; the shell is provided with an air guiding channel, a first bearing face and a second bearing face adjacent to the first bearing face; an included angle is formed between the first bearing face and the second bearing face, a first opening is formed in the first bearing face, and a second opening is formed in the second bearing face; the fan is installed in the shell and corresponds to the air guiding channel; the two light source devices are installed in the shell, each light source device comprises a light emitting module and a heat dissipation fin base making hot contact with the light emitting module, one light emitting module is exposed out of the first opening, the other light emitting module is exposed out of the second opening, and the heat dissipation fin bases are contained in the air guiding channel. Accordingly, the bidirectional illumination lamp has the advantages of adding the light emitting direction, increasing the brightness region and enhancing the heat dissipation efficiency.

The invention discloses a fixing device for an electric power instrument. The fixing device for the electric power instrument comprises a bottom seat, wherein a support pillar is rotatably connected with the middle position of the top of the bottom seat through a bearing, a fixed box is fixedly connected with the top of the support pillar, through holes evenly distributed are formed in the bottomof the fixed box, and electric push rods are connected with inner walls of two sides of the fixed box through bolts. When the fixing device for the electric power instrument is used, the electric power instrument is placed in the fixed box, the two electric push rods push the electric power instrument inwards, the electric power instrument is clamped and fixed through two main push plates, heat dissipation air fans are respectively placed in two fan boxes, the air fans blow airstream upwards after electrified, the airstream performs heat dissipation on the electric power instrument through thethrough holes in the bottom of the fixed box, the overheating circumstance is prevented from occurring in long time work of the electric power instrument, the fan boxes can fix the air fans on the heat dissipation position, the air fans are convenient to dismount and maintain, and two rubber rings achieve a protection and buffering function for the air fans, and prevent the air fans from being damaged due to collision generated when the air fans are placed in the fan boxes.

The invention discloses a combined substation. The combined substation comprises a box body, wherein a first partition plate is fixedly arranged at a left end of an inner cavity of the box body, a second partition plate is fixedly arranged at a right end of the inner cavity of the box body, line through holes are formed in upper ends of inner surfaces of the first partition plate and the second partition plate, first rollers are movably arranged at the bottom of a left side of the first partition plate and the bottom of a right side of the inner cavity of the box body, high-voltage switch equipment is movably connected with upper surfaces of the first rollers, and second rollers are movably arranged at the bottom of a right side of the first partition plate and the bottom of a left side ofthe second partition plate. In the combined substation, the first partition plate is fixedly arranged at the left end of the inner cavity of the box body, the second partition plate is fixedly arranged at the right end of the inner cavity of the box body, the high-voltage switch equipment is placed on the upper surfaces of the first rollers, a power distribution transformer is placed on upper surfaces of the second rollers, low-voltage power distribution equipment is placed on upper surfaces of third rollers, the combined installation demand of the substation is achieved, and people is convenient to disassemble and maintain the substation.

The invention discloses an aviation spraying device. The device comprises an aircraft and a spraying system which is arranged on the aircraft, the spraying system comprises multiple spray nozzles anda medicine box, a booster pump and a spraying pipe which are connected in sequence, the spray nozzles are evenly arranged on the spraying pipe, the spraying pipe is detachably arranged on the aircraft, and medicine liquid in the medicine box is pumped into the spraying pipe through the booster pump. According to the aviation spraying device, the spraying pipe is detachably arranged on the aircraft, and the spraying pipe and the spray nozzles on the spraying pipe are disassembled and maintained conveniently.

The invention discloses a heavy-duty one-character locking ball valve in the technical field of ball valves. The ball valve comprises a valve body, wherein a valve rod is arranged in the inner cavityat the upper end of the valve body; a rotary screw rod is connected in the top of the valve rod in a movable and inserted manner; a rotary handle is arranged at the top of the rotary screw rod; a movable top rod is connected in the inner cavity of the rotary screw rod in a movable and inserted manner; insert blocks are arranged on the inner walls of four sides of the inner cavity of the valve rod;a limiting hole is formed in one end of each the insert block far away from the inner wall of the valve rod; a clamping device is fixedly arranged on the inner wall of the rotary screw rod; the clamping device comprises a fastening sleeve ring fixedly formed in the inner wall of the rotary screw rod; movable plate blocks are uniformly arranged on the inner walls of four sides of the fastening sleeve ring; spring rods and limiting rods are arranged at one end of each the movable plate block close to the inner wall of the fastening sleeve ring; and the other end of each the limiting rod penetrates through the rotary screw rod and extends to the inner side of each the limiting hole. The ball valve can be conveniently fixed; and meanwhile, the movable top rod can be directly pulled out duringreplacement and maintenance, so that disassembly and maintenance are facilitated.

The invention discloses a butterfly valve structure comprising a valve body, a valve, and filter screens. The valve body is in a 1 / 4 spherical chamber structure. The filter screens include a first filter screen and a second filter screen both in 1 / 4 spherical chamber structures, and the first filter screen, the valve and the second filter screen are connected in sequence to form a valve structure fitted in the valve body. The butterfly valve structure is in the valve structure combining the filter screens and the valve; the first and second filter screens are mounted on two sides of the valve body to form the valve structure; when the valve structure closes, gas cannot pass through; when the valve structure opens, the gas passing through is filtered by the first and second filter screens; foreign matters such as glass fragments in the gas can be prevented from entering a mechanical pump through a pipeline; the butterfly valve structure is helpful for checking and replacing the valve and the filter screens and convenient for demounting and maintenance.