165 results about "Central cylinder" patented technology

The utility model discloses an integrated magnetic flocculation device system and relates to the technical field of water treatment devices. The device comprises a device shell, a central cylinder, a conical mud bucket, a water inlet pipe, a flocculant dosing pipe, a pipeline mixer, a gas inlet pipe for gas stripping, a coagulant aid dosing pipe, a water outlet pipe and a mud discharge pipe, according to the utility model, when water enters, a flocculant is added and mixed on a water inlet pipe by using a pipeline mixer, after water enters the magnetic coagulation area, compressed air is used as a power source for circulation and mixing, a coagulant aid is added above an air release port, supplementary magnetic powder is added to an upper opening of a central cylinder, and water subjected to magnetic coagulation reaction enters the precipitation separation area; when the magnetic coagulation reaction device is used, supernatant is collected by the water collecting tank and then discharged, precipitated sludge containing magnetic powder can slide into the conical sludge bucket to be treated again, redundant sludge is discharged through the sludge discharging pipe, the whole magnetic coagulation reaction and sludge-water separation treatment process is completed in one device, and an independent backflow system is not needed.

A device (1) for holding and / or moving a rod-shaped body (2) is proposed, comprising: a fully enclosed housing (3) with a longitudinal axis (L) along which the rod-shaped body (2) is guided or is to be guided; a thrust piston (4) surrounding the rod-shaped body (2), which can be subjected to a first pressure from the outside via a first pressure port (L) through the housing (3) and which can be subjected to a second pressure from the outside via a second pressure port (K) through the housing (3), and which has a first effective surface (5) and a second effective surface (6), which effective surfaces (5, 6) preferably extend in a radial direction, wherein the first effective surface (5) is in fluidic operative connection with the first pressure port (L) and the second effective surface (6) is in fluidic operative connection with the second pressure port (K), wherein the thrust piston (4) has a radially internal recess (7) through which a circumferential free space (8) is formed between the rod-shaped body (2) and an inner surface (9) of the thrust piston (4), which free space (8) has an axial limit (10, 11) on both sides; and at least one clamping sleeve (12) which, with its inner surface (13), defines a central cylindrical area through which the rod-shaped body (2) is guided or can be guided, and which is received in the aforementioned free space (8), extending axially between the two axial limits (10, 11), wherein the clamping sleeve (12) can be subjected to a third pressure from the outside via a third pressure port (V) through the force-pull piston (4) and is designed to deform itself reversibly radially inwards according to the third pressure and to exert a holding force on the rod-shaped body (2).

The application discloses a punching device for motorcycle exhaust muffler pipes and particularly relates to the technical field of punching devices, which comprises a supporting frame, a clamping and punching assembly arranged on the supporting frame, the clamping and punching assembly comprising a central cylinder arranged in the supporting frame, one end of the central cylinder being provided with an adjusting circular truncated cone cylinder, and a plurality of clamping blocks being arranged on the middle part of the adjusting circular truncated cone cylinder. The clamping blocks can be synchronously contracted or expanded along the radial direction, and the arc-shaped fitting grooves on the clamping blocks and the rubber pads can stably clamp the motorcycle exhaust muffler pipes with a certain range of outer diameter differences. The punching device can solve the problem that the traditional punching device can only be adapted to single-specification pipes and the time-consuming replacement of molds, greatly improve the universality of the equipment, simultaneously punch different positions of the same section of the muffler pipe, and automatically feed the slip ring through the motor-driven screw rod, so that the clamping, angle adjustment, punching and resetting linkage operation can be completed, manual intervention is reduced, and the operation strength is reduced.

The invention belongs to the technical field of reagent extraction, and particularly relates to chemical reagent uniform mixing and extracting equipment for a laboratory and a using method thereof.The chemical reagent uniform mixing and extracting equipment comprises a base, a rotary drum is rotationally installed on the base through a motor, a storage barrel is detachably installed on the rotary drum, and a rear frame is arranged on the rear portion of the base. The central cylinder drives the plurality of injectors to circularly work to form an extraction-transfer-sample adding assembly line, so that when a chemical reagent is extracted into a test tube, the sampling of multiple parts of the reagent can be continuously completed, and by regulating and controlling the downward moving range of the sliding frame, the sampling efficiency is greatly improved. When the liquid level drops after the reagent in the storage barrel is extracted for a certain number of times, the injector on the sliding frame can always extract the chemical reagent in the storage barrel, and the position of the rectangular piece can be accurately controlled when the pointer slides on the graduated scale by lifting the lifting plate on the rectangular piece.

A core structure of a coil-wound heat exchanger and a coil-wound heat exchanger. The core structure comprises a central cylinder and a heat exchange tube, which extends in the axial direction of the central cylinder and is spirally wound around the periphery of the central cylinder layer by layer from the inside out to form multiple spiral tube layers. The core structure further comprises an annular sound-absorbing cylinder, the peripheral wall of which forms a sound-absorbing cavity with two open ends by means of enclosure and is circumferentially arranged between two adjacent spiral tube layers. During heat exchange, the sound-absorbing cylinder of the present utility model can absorb noise generated during the heat exchange of the part of the core structure enclosed within the sound-absorbing cylinder, thereby achieving the effect of noise reduction. Moreover, since the two ends of the sound-absorbing cylinder are open, a shell-side medium for heat exchange can enter and exit the sound-absorbing cylinder for heat exchange, without affecting the normal heat exchange operation of the core structure.

The utility model relates to the technical field of liquid packaging machine equipment, and discloses a feeding device of a back sealing liquid packaging machine, which comprises a liquid storage tank, the upper side of the liquid storage tank is rotatably connected with a second bevel gear, and the lower side of the second bevel gear downwards penetrates through an upper tank cover of the liquid storage tank and is fixedly connected with a plurality of connecting rods; a plurality of connecting rods are arranged in the liquid storage tank, the lower ends of the plurality of connecting rods are jointly and fixedly connected with a central cylinder, a shaftless auger blade is rotatably connected in the central cylinder, and the upper end of the shaftless auger blade is fixedly connected with a transmission rod. The shaftless auger blade can convey macromolecular substances settled below the liquid storage tank to the upper-layer space of the liquid storage tank along the central cylinder, and the macromolecular substances are mixed with an upper-layer low-density solution, so that the density difference value of the upper-layer solution and the lower-layer solution is reduced, and the densities of the upper-layer solution and the lower-layer solution in the whole liquid storage tank tend to be uniform relatively.

The invention belongs to the technical field of combustion equipment, and relates to a plasma ignition system and a using method thereof. The system comprises a plasma generator, a combustor, a power supply system, a carrier working medium system and a cooling water system, an anode and a cathode of the plasma generator are coaxially arranged to form an electric arc cavity and a surrounding cooling water cavity, and the anode is provided with a compressed air inlet and a plasma jet outlet; the plasma combustor is sequentially and coaxially sleeved with a first-stage center cylinder, a second-stage combustion cylinder and an outer wall cylinder from inside to outside, the first-stage center cylinder communicates with the jet flow outlet, and the outer wall cylinder is provided with a pulverized coal inlet; the power supply system supplies power to the generator through the isolation transformer and the rectifier cabinet. The carrier working medium system supplies air to the compressed air inlet; the cooling water system enables demineralized water to circulate in the cooling water cavity. Efficient and stable ignition and low-nitrogen combustion of pulverized coal are achieved, the ignition reliability is remarkably improved, the system service life is remarkably prolonged, and the operation automation level is remarkably improved.

The utility model discloses a manufacturing auxiliary device for an aluminum coiled tube type heat exchanger, and belongs to the technical field of heat exchanger manufacturing tools. The device provided by the utility model comprises a manufacturing platform, an automatic pipe feeder, two turntables, a central cylinder and a track. Each rotating disc is fixedly installed on the manufacturing platform through a roller frame, the center cylinder is horizontally installed between the two rotating discs, the two ends of the center cylinder are fixedly connected with the rotating discs through clamps respectively, and the central axis of the center cylinder and the central points of the rotating discs are located at the same horizontal height. The automatic pipe feeding machine is arranged on one side of the manufacturing platform and is in sliding connection with the track. And an automatic lifting machine is arranged on the automatic pipe feeding machine. An operator flexibly adjusts the conveying speed of the aluminum pipes through the automatic lifting machine and the automatic pipe conveying machine, it is ensured that the aluminum pipes are tightly attached to the center cylinder or the aluminum pipes on the upper layer, and therefore the pipe winding flatness and the gap precision are improved. And meanwhile, the automatic pipe feeding machine can move left and right along with an operator, so that the convenience and efficiency of pipe winding work are further improved.

The invention relates to the technical field of grinding machines, in particular to a grinding machine with automatic discharging and sorting functions. According to the technical scheme, the machine comprises a machine shell, wherein a side part is arranged on the side edge of the machine shell; the charging barrel is fixedly connected to the top of the shell; the inner barrel is rotationally connected into the charging barrel; the bottom bin is fixedly connected to the bottom of the inner cylinder; the central cylinder is fixedly connected to the center of the inner cylinder; the sieve tray is arranged in the inner cylinder in a sliding manner; the sealing rod is fixedly connected to the bottom of the inner cylinder; the first driving piece is arranged in the machine shell; the second driving piece is arranged in the machine shell; the bottom of the inner cylinder is funnel-shaped, the central cylinder is of a hollow structure, and a feeding hole is formed in the lower part of the central cylinder and corresponds to the lowest point of the bottom of the inner cylinder; and the conveying piece is arranged in the central cylinder. The problems that in the prior art, additional screening operation is needed, abrasive recovery is inconvenient, and overall manual intervention is much can be solved, so that the abrasive and abrasive dust separation efficiency is improved, and the overall grinding machining efficiency and the material utilization rate are improved.

This utility model discloses a mechanically replaceable side-mounted agitator, comprising a motor mounted on a bracket, the motor being connected to the input shaft of a reducer via a coupling, a main shaft inserted into the central cylinder of the reducer mounting base, a hollow shaft fitted onto the outer wall of the central cylinder, a large bevel gear fixedly fitted onto the outer wall of the hollow shaft, a small bevel gear fixedly fitted onto one end of the reducer's input shaft inserted into the housing, the small bevel gear meshing with the large bevel gear, and the end of the hollow shaft connected to the end of the main shaft via a transmission sleeve; a bushing fitted onto the main shaft, and a rear-end mechanical seal fitted onto the bushing, the rear-end mechanical seal being located between the outer wall of the bushing and the inner wall of the central cylinder of the mounting base, the end of the bushing having a protruding stop ring, the front end of the rear-end mechanical seal being tightly fitted against the stop ring. This utility model discloses a mechanically replaceable side-mounted agitator, enabling online replacement of the rear-end mechanical seal.

To provide a circuit breaker (1) for a HV circuit-breaker.SOLUTION: The circuit breaker includes a pair of permanent contacts (24, 41), at least one of them being movable along an axis (AA'); an insulating nozzle (30) having a central cylindrical wall (33) defining a longitudinal cylindrical hole (36), along the axis; and a pair of arcing contacts (22, 42), at least one of them being movable along the axis, a lateral wall of one of the arcing contacts being at a distance from the central cylindrical wall thereby defining a cylindrical volume between the arcing contact and the central cylindrical wall, the arcing contact further comprising at least one inner central channel (220) extending along the axis and along part of the arcing contact, and at least one lateral conduit (26) between the at least one inner channel and at least one lateral hole (27).SELECTED DRAWING: Figure 1A

This utility model relates to the field of sunflower seed screening technology and discloses a sunflower seed processing and screening device, including a central cylinder. Lifting and adjusting components are provided on both sides of the upper end of the central cylinder, and these components are used to adjust the height as needed. A movable pushing component is provided on the inner side of the upper end of the central cylinder, and this movable pushing component is used to push out suspended sunflower seeds. This sunflower seed processing and screening device, by installing the movable pushing component, uses a welded plate to provide an installation position for the inner structure. A drive motor controls the rotation of the drive shaft, which in turn drives a C-shaped bracket for lateral adjustment via two sets of large gear discs. During adjustment, a connecting plate drives a pushing plate to move laterally via a connecting guide plate. Since the pushing plate is in a vertical position, it does not significantly affect the airflow. Through lateral movement, the pushing plate pushes out sunflower seeds suspended in the designated area, which are then discharged and collected by the guide plate.

The utility model belongs to the technical field of air preheaters, and particularly relates to a sealing, energy-saving and efficiency-improving device for a central cylinder of an air preheater, which is characterized in that an outer ring is mounted on a base arranged on the central cylinder, and an inner ring consisting of arc sections is arranged in a chute on the inner side of the outer ring; and the back surface of each arc section is connected with an elastic piece, so that the inner ring is in sealing contact with the outer wall of the central cylinder, air leakage in the air preheater is reduced, and energy conservation and efficiency improvement are facilitated. In the operation process of the air preheater, when the center cylinder shakes, the corresponding arc sections are ejected outwards in the radial direction, and when the center cylinder does not eject the arc sections outwards any more, under the action of the elastic pieces, the arc sections can continue to be in contact with the inner diameter face of the center cylinder again, and therefore the air preheater is prevented from being damaged. The elastic action type sealing structure does not generate a gap with the central cylinder due to the shaking of the central cylinder, so that the effective sealing service life is longer.

The application provides a coiled tube heat exchanger using spherical clamping strips to fix tube bundles, and belongs to the technical field of heat exchange equipment, and comprises a central cylinder and a plurality of clamping strips with spherical protrusions arranged on the outer wall of the central cylinder. The upper surface of the clamping strip is provided with a spherical protrusion structure, and adjacent spherical protrusions constitute a heat exchange tube positioning element. The spacing between the spherical structures is optimized to match the arrangement of the tube bundles, and the outer surface of the central cylinder is wound with heat exchange tubes. The clamping strip with the spherical protrusion adopts a reverse stamping process in the manufacturing process, so that the processing surface is located on the non-contact side of the heat exchange tube, effectively avoiding direct friction damage of the processing defects to the tube wall. The spherical streamline structure reduces the turbulence intensity when the shell side fluid flows around, effectively reduces the shell side pressure drop while ensuring the positioning accuracy of the heat exchange tube, and improves the heat transfer efficiency of the heat exchanger. The clamping strip with the spherical protrusion omits the independent welding area required by the traditional tube clamp, thereby reducing the material consumption of the clamping strip.

The conveyor belt (24) of an oven system and apparatus (20) is configured into ascending and descending spiral stacks (26) and (28) to define a central cylindrical channel (62). A pair of upper and lower fans (130) and (132) are positioned within the central cylindrical channel (62) to circulate thermal processing fluid in upper and lower circuits vertically through the spiral stacks and also laterally toward the inlet of the fans (130) and (132) to set up upper and lower thermal processing zones in the spiral stacks and circulation routes for the cooking medium through the spiral stacks.

This invention discloses an oil extraction device, including a packer. The packer includes a central cylinder with a first end and a second end. A first sleeve is fitted over the central cylinder. An annular piston is installed in the cavity formed between the first sleeve and the central cylinder, dividing the cavity into a first chamber and a second chamber. A second sleeve is installed in the second chamber. A rubber sleeve is fitted over the central cylinder. A water inlet hole communicating with the first chamber is provided on the side wall of the central cylinder. A third sleeve is installed outside the first sleeve. The third sleeve has a driving member that extends through the first sleeve into the first chamber. A third elastic member is installed between the driving member and the end of the first chamber facing the first end. The third elastic member pushes the third sleeve to move towards the second end. During depressurization, the third sleeve can move towards the rubber sleeve and squeeze the rubber sleeve, thereby increasing the pressure of the rubber sleeve on the first abutment member, accelerating the retraction of the second sleeve, thereby accelerating the discharge of water from the first chamber and accelerating the unsealing speed of the packer.

The utility model discloses an improved sealing gasket, a drainer and a drainage device, the improved sealing gasket is mounted on the edge of an upper end cover of a drainer shell which is detachably arranged in a drainage port of a wash basin, the improved sealing gasket comprises an annular hollow sealing gasket body, and the sealing gasket body is integrally formed by an elastic material; the sealing gasket body comprises a center cylinder allowing a drainer shell to penetrate through and a first elastic sealing edge formed on the periphery of the sealing gasket body. And an annular second elastic sealing edge is arranged on the lower surface of the sealing gasket body between the central cylinder and the first elastic sealing edge. Compared with the prior art, the sealing gasket has the advantages that the first elastic sealing edge and the second elastic sealing edge are arranged on the sealing gasket, and the two elastic sealing edges are matched with each other, so that the adaptability of the sealing gasket is improved. And a vacuum cavity can be formed, and the adsorption capacity of the sealing gasket is improved.

This utility model discloses a suction cup mechanism for transferring large timber boards, including a central cylinder with telescopic horizontal lifting cylinders fixedly connected to both sides. An extension tube is inserted into the other end of each telescopic horizontal lifting cylinder. This suction cup mechanism for transferring large timber boards utilizes an internal thread to activate the rotating cylinder, generating a threaded displacement force on the surface of the extension tube. This, combined with an internal rectangular positioning rod, constrains the rotation direction of the extension tube, causing it to extend and retract outward within the telescopic horizontal lifting cylinder. This allows for adjustment of the distance between the two large suction cups according to different sizes of timber boards. A vacuum pump extracts the gas adsorbed inside the timber boards by the large suction cups, using the pressure difference to firmly adhere the timber boards to the suction cups. This allows for adjustable suction and lifting based on different sizes of timber boards, enabling stable lifting by directly adsorbing the large suction cups onto the stable points of the timber boards.

A return towing head for directional synchronous crossing of a main pipeline and an outer casing, relating to the field of pipeline crossing technology, includes an outer casing, a main pipeline, and a return towing head. Reinforcing plates are welded to the outer wall of the outer casing at equal intervals along the circumference. The return towing head includes a main body, with tie rods evenly spaced along the circumference at the ends of the main body. The tie rods can extend between two reinforcing plates, and a limiting plate is provided at the end of the tie rod. When the outer casing and the return towing head need to connect, the limiting plate is placed horizontally on the reinforcing plates on both sides, thus forming an effective connection. A central cylinder is provided inside the main body, and a top block is slidably mounted radially upward on the central cylinder. One end of the top block can abut against the inner wall of the main pipeline. A drag rod is slidably mounted axially upward on the central cylinder, and the drag rod has a conical portion. The other end of the top block can abut against the conical portion of the drag rod. When the drag rod is dragged outward, the conical portion pushes the top block out and presses it tightly against the inner wall of the main pipeline. Thus, this application achieves synchronous dragging of the outer casing and the main pipeline by the return towing head.

This utility model discloses a replaceable gear, including a gear body, a central cylinder, and an auxiliary mechanism. The gear body has teeth on its exterior and a through hole. The central cylinder is slidably inserted into the inner cavity of the through hole. The central cylinder has an assembly hole inside. The auxiliary mechanism is located on the gear body and is used to fix the central cylinder to the gear body. The auxiliary mechanism includes a positioning seat and a positioning pin. The positioning seat is fixedly connected to the exterior of the central cylinder. This utility model utilizes the mutual cooperation of the central cylinder, assembly hole, positioning seat, positioning pin, and rotating head. Multiple central cylinders are provided, and their internal assembly holes have different sizes. The positioning seat and positioning pin position the central cylinder for installation on the gear body, and the locking pin limits the relative position of the positioning pin and the fixing ring. This facilitates the installation and disassembly of central cylinders with different internal dimensions to adapt to different sized shafts, improving the gear's adaptability.

This invention discloses a pneumatic concave cavity flame stabilization device for an afterburner, comprising a central cylinder, an annular combustion chamber shell, a diffuser, an afterburner shell, a pneumatic concave cavity pipe, and a central cylinder connecting rod. The diffuser fixes the annular combustion chamber shell and the afterburner shell together. The central cylinder is fixed to the center of the annular combustion chamber shell via the central cylinder connecting rod. The pneumatic concave cavity pipe extends through the central cylinder into the afterburner shell. The vertical jet from the pneumatic concave cavity exhaust port of this invention can enhance the recirculation zone and stably maintain a low-speed recirculation vortex under different operating conditions, stabilizing the combustion operating range and reducing the risk of flameout. The vertical jet from the pneumatic concave cavity exhaust port of this invention can entrain fuel and air into the cavity, prolonging the fuel residence time and fundamentally improving combustion efficiency. The vertical jet from the pneumatic concave cavity exhaust port of this invention can fill the low-pressure zone at the rear edge of the cavity, reducing resistance, significantly reducing total pressure loss, and improving engine thrust efficiency.

The invention discloses a feeding structure and an injection molding machine, and relates to the technical field of injection molding.The feeding structure comprises a hopper, a center cylinder is coaxially arranged in the hopper, a plurality of partition plates are arranged on the center cylinder, the hopper is divided into a plurality of material areas by the partition plates, the partition plates can move in the circumferential direction of the center cylinder to adjust the capacity of the material areas, and an annular vibrating body is arranged on the center cylinder; the vibrating body is provided with a quantity control ring capable of axially moving and adjusting, and an annular channel for materials to pass through is formed between the bottom of the quantity control ring and the conical annular inner wall of the hopper. According to the feeding structure, the partition plates of the feeding structure can divide the hopper into the multiple material areas, the capacity of the material areas can be adjusted according to the proportion of all the materials, the upper portion of the vibrating body vibrates on the basis of directly bearing part of the weight of the materials, the probability that the materials are extruded by gravity to form bridges is structurally reduced, and it is ensured that the feeding process is continuous and smooth; the quantity control ring on the vibrating body can move in the axial direction to adjust the opening degree of the annular channel, and accurate control over the feeding flow is achieved.

The utility model relates to an auxiliary supporting structure for a rotary platform of a stereo garage. The auxiliary supporting structure comprises a supporting seat arranged on a lifting arm, an auxiliary supporting rod with one end installed on the rotary platform and a roller assembly installed at the other end of the auxiliary supporting rod. The roller assembly rolls on the supporting seat; the four auxiliary supporting rods are evenly distributed in the circumferential direction of the rotary platform. The annular supporting seat is concentric with the central cylinder; each roller assembly comprises an open groove formed in the corresponding auxiliary supporting rod, a center shaft fixedly connected with the side wall of the open groove and a roller rotationally connected with the center shaft. A bearing is arranged on the roller; the rotary platform has the beneficial effects that the auxiliary supporting rods and the rolling wheels are arranged between the rotary platform and the supporting arms, the edge of the rotary platform can be supported on the supporting arms, the rigidity of the rotary platform is improved, and deformation of the edge of the rotary platform can be avoided.

The utility model discloses a special pneumatic claw for automatic positioning equipment for a heat transfer tube of a heat exchanger, which relates to the technical field of nondestructive testing of heat exchangers in the electric power industry and comprises a moving substrate, and a cushion block is mounted above the moving substrate; a lower piston structure of the piston pull rod is mounted in the central cylinder body, and forms an air cylinder structure with the lower end cover and the upper end cover, and the expansion head acts in the pipe hole; the utility model relates to a fixing device required by tube plate crawling positioning equipment applied to eddy current testing equipment, the device is called as a pneumatic claw, and the pneumatic claw can enable the tube plate crawling positioning equipment to tightly grasp a tube hole and freely crawl or position on a tube plate. The pneumatic claw can realize the expansion action, the contraction action, the action of inserting the expansion head into the pipe hole and the action of pulling the expansion head out of the pipe hole in the pipe hole, can be applied to grasping and positioning of various heat transfer pipe holes, and provides technical support for realizing automatic detection of eddy current detection of more heat transfer pipes of heat exchangers.

The satellite flexographic printing central roller unit comprises a central roller, a central shaft arranged in the central roller, and a first bearing seat fixed to one end of the central shaft; a driving coding assembly is mounted on the side of the first bearing seat away from the central roller, and the driving coding assembly is fixed to the first bearing seat and the central shaft; a second bearing seat is mounted on the other end of the central shaft, and a brake braking assembly is fixed to the side of the second bearing seat away from the central roller; a cooling assembly is mounted at the transverse axis of the central shaft in the central roller, and the cooling assembly extends to the side of the brake braking assembly. The torque motor mounted at the shaft end of the central roller shaft can directly drive the roller, without transmission power loss, and the line speed accuracy of the central roller is improved; the water cooling joint of the central roller can be cooled by cold water to ensure the diameter size of the central roller, and the printing quality is not affected by temperature change.

The utility model relates to the field of carbon processing. The high-purity carbon powder grading crushing device comprises a bottom frame and a machine shell arranged on the bottom frame. A circle of annular discharging opening is formed in the position, close to the edge, of the bottom of the machine shell, and a filter screen is arranged in the discharging opening; a feeding hopper communicated with the interior of the machine shell is arranged on the lower portion of one side of the machine shell. A center cylinder is arranged in the machine shell, and the lower end of the center cylinder is connected with a first gear motor located at the bottom of the machine shell. A plurality of crushing conical surfaces are formed on the inner side wall of the central cylinder, and the slopes of every two adjacent crushing conical surfaces are opposite; a side hole is formed in the side wall of the lower part of the central cylinder; a vertical center shaft is arranged in the center of the interior of the machine shell, and spiral blades extending around the center cylinder in the vertical direction are arranged on the outer side wall of the center cylinder. According to the multi-stage crushing device, multi-stage crushing of materials can be quickly realized, and the materials can be circularly crushed, so that the product quality is improved.

A compact type winding pipe heat exchanger comprises a shell pass cylinder, a winding pipe, a winding pipe and a winding pipe, the two tube plates are respectively arranged at the upper end and the lower end of the shell pass cylinder; the central cylinder is vertically arranged in the shell pass cylinder; the heat exchange tubes are arranged in the shell pass barrel, and the two ends of each heat exchange tube are supported on the corresponding tube plates respectively; the two tube boxes are provided with tube pass connecting tubes and are respectively arranged on the corresponding tube plates; the lower portion of the center cylinder is hollow to form a first channel with the bottom open, and a first through hole is formed in the side wall of the first channel so as to communicate the first channel with the inner space of the shell pass cylinder. The upper part of the central cylinder is hollow to form a second channel with an open top; a second through hole is formed in the side wall of the second channel; meanwhile, shell pass connecting pipes are arranged on the two pipe boxes, and the shell pass connecting pipes are communicated with the bottom opening of the corresponding first channel and the top opening of the corresponding second channel through connecting pipes of the shell pass connecting pipes. The axial length of the heat exchanger is reduced while the heat exchange effect is guaranteed.

The utility model discloses a secondary sedimentation tank which comprises a tank body, the central cylinder is mounted in the tank body and connected with a water inlet pipe, and sewage enters the central cylinder from the water inlet pipe; the effluent weir is positioned at the upper part of the tank body, and clear water is discharged from the effluent weir after sewage enters the tank body to be settled; the sludge outlet pipe is used for discharging sludge settled at the bottom of the tank body out of the tank body; wherein a reflecting plate is arranged below the central cylinder, and sewage from the central cylinder flows through the reflecting plate and then enters the tank body. Compared with the prior art, the secondary sedimentation tank has the advantages that the reflecting plate is arranged below the central cylinder, and sewage from the central cylinder flows through the reflecting plate and then enters the tank body, so that the flow direction of the sewage can be changed, and the sewage is prevented from directly impacting the bottom of the secondary sedimentation tank.

A barium sulfate precipitation device includes a cylindrical body and a frame-shaped transmission device support mounted on top of the cylindrical body. A funnel-shaped lower tank is located at the bottom of the cylindrical body. A vertical central cylinder is fixed at the center of the cylindrical body, and a funnel-shaped sludge discharge hopper is located at the lower center of the central cylinder. A vertical drive shaft of a geared motor extends to the sludge discharge hopper. One end of each set of scraper blades is fixedly connected to the side wall of the drive shaft. A water collection trough is located on one side of the top of the cylindrical body, and a brine outlet communicating with the outside is located on one side of the water collection trough. A brine inlet communicating with the outside is located on the transmission device support on one side of the geared motor. A sludge discharge pipe is located on one side of the bottom of the sludge discharge hopper. This invention effectively removes barium sulfate impurities from brine, improving the purity of the brine; it achieves continuous separation of barium sulfate precipitation and clarification of brine, improving the efficiency and stability of chlor-alkali production, and facilitating the continuous and automated production process.

The invention relates to the technical field of visual inspection, in particular to a holder visual inspection device and method. Comprising a platform rack and a Y-axis lead screw module on the upper surface of the platform rack; an overturning module and a 360-degree rotating module are arranged above the Y-axis screw rod module; the upper surface of the platform rack is fixedly connected with a gantry module; an X-axis lead screw module and a Z-axis lead screw module with a visual module are mounted on the gantry module; a jig on the 360-degree rotating module is formed by combining a rectangular plate at the upper part and a cylinder at the center at the lower part; a circular groove is formed in the center of the jig; the piston in the jig is driven to move downwards through the gravity of the product, so that the four clamping blocks push the product to move towards the center of the jig from the four directions of the product, the product is placed in the middle and clamped on the upper surface of the jig, the situation that the products on the subsequent adjacent jigs collide and make contact in the rotating process is avoided, and the product quality is improved. And the product detection stability and efficiency are improved.