30results about How to "Guaranteed inner diameter" patented technology

The invention provides a punching head, which comprises an expanding mold core (10) and a reducing jacket (30), wherein the first end of the expanding mold core (10) is an expanding end (11) and the second end of the expanding mold core (10) is a connecting end; and the expanding mold core (10) is installed in the inner hole of the reducing jacket (30), the first end of the reducing jacket (30) is a reducing end (31), and a gap is kept between the reducing end (31) and the expanding end (11). The punching head has the advantages of high production accuracy, simple production process and high efficiency.

The invention discloses extrusion and press molding equipment for fin heat exchange pipes. The equipment comprises a power source module, wherein the power source module and a driving module are connected in a direct connection mode, the right side of the driving module is connected with a forming module, the forming module is adjacent to a heating module, and the right end of the heating module is connected with a feeding module; and a material table is arranged on the rear side of the feeding module, a metal pipe pushing module is fixedly arranged on the front side face of the feeding module, a supporting group is arranged on the right side of the feeding module, and an inner core pushing module is arranged at the top of the supporting group. The metal pipe is heated at a high temperature through medium-frequency heating by the equipment, the metal pipe is pushed to a front side extrusion and press module in the forming module and between a rear side extrusion and press module and abottom extrusion and press module, the external fins of the fin heat exchange pipes are molded through the extrusion and press of the front side extrusion and pres module, the rear side extrusion andpress module and the bottom extrusion and press module, so that the strength of the produced fin heat dissipation pipes is high, heat exchange performance is good, and the phenomenon of dust deposition in a using process can be effectively avoided.

The invention discloses a forming method and device for simultaneously thickening a pipe end shrinkage mouth. The forming device comprises a hydraulic cylinder, a push head, a die, a filler block, heating bars, a cooling device and a heating device; a circular disc is connected to the hydraulic cylinder, a guiding cover is arranged on the circular disc, the push head is arranged on the hydraulic cylinder and penetrates through the guiding cover, the die is arranged at one side of the push head, the cooling device is arranged between the die and the push head, the die comprises a mold cavity and heating holes, the filler block is arranged in the mold cavity, and the heating bars are arranged in the heating holes, and are connected with the heating device; the filler block comprises a conical part and a reducing part, the conical part is arranged at one end of the filler block and is connected with the reducing part, and a material pushing rod is further arranged at one end of the reducing part. Through the design of the conical part of the filler block, a certain supporting effect is achieved on a pipe blank in a sudden-change area, the situation that the pipe blank gets unstable inwards when the pipe blank suffers from the axial compression stress is prevented, the forming technology is simple, the machining allowance is reduced, and the processing cost and production investment are lowered.

The invention relates to a sulfur tail gas super-gravity desulfurization device and process thereof. The sulfur tail gas super-gravity desulfurization device comprises an alkali liquid storage tank and a super-gravity machine; the device utilizes alkali liquid to desulfurize sulfur tail gas, and a unique super-gravity machine structure is provided; in the structure, a hollow rotary shaft with a fluid channel is formed in a shell in a manner of penetrating through the middle axis of the shell, and a sleeve with a gas channel function sleeves the hollow rotary shaft; meanwhile, a rotary channel, which is communicated with a filling region and is provided with a spiral channel, is also formed on the basis; fluid passes through the hollow rotary shaft and then self rotation of the fluid is realized through the rotary channel, and then the fluid enters the filling region; the liquid is crushed and torn into small liquid drops under the action of a centrifugal force of liquid and is in sufficient contact with liquid reverse-flow small bubbles, and a phase interface, which is rapidly updated, is provided; crushing and tearing mixing of the fluid and gas is further realized by utilizing the self-rotation under a rotary state; the sufficient degree of gas-liquid contact is improved, and furthermore, the better sulfur tail gas desulfurization effect is obtained.

The invention belongs to the field of surface treatment and particularly relates to a chromium-plated tooling. In the prior art, because a very poor depth capability in a chromium-plating process, uniformity degree of the thickness of a plating layer is difficult to ensure, so that only is a thick chromium can be plated, wherein the thickness is large than a required thickness by more than 50 [mu]m, and then the thick chromium is grinded until a use size in a mechanizing workshop. Another reason why a uniform thickness cannot be ensured is that an auxiliary anode during chromium-plating is required. Because a solution in a chromium trough is very low in transparency, the added auxiliary anode is very difficult to be ensured to be at a central position. Meanwhile, there is a potential risk that the anode contacts with the surface of a part, which causes electricity discharge and even causes part scrapping. The conventional production method is long in period, is high in cost and has quality potential risk. The chromium-plated tooling in the invention is convenient to use and is stable and reliable, and is suitable for producing aviation products as a tooling for plating chromium on inner bores. The tooling allows several parts to be electro-plated at the same time, is free of a grinding process after chromium-plating and can ensure inner diameter size and roundness of the part after chromium-plating to satisfy requirements.

The invention relates to a supergravity sewage treatment device. Firstly, a filter and a membrane component are utilized for carrying out pretreatment on electro-desalting sewage, then alkali liquor in an alkali liquor tank is mixed with the sewage treated by the filter and the membrane component, the mixture enters a supergravity machine through a fluid channel of the supergravity machine, by virtue of a unique supergravity machine structure and a rotating channel which is formed between a hollow rotating shaft and a sleeve, is communicated with a filler region and is provided with a helical channel, spinning entrance of fluid through the rotating channel after passing the hollow rotating shaft is realized, intensive mixing of the sewage in the fluid and the alkali liquor is realized under the actions of a rotation acting force, a shearing force and a spinning acting force of the fluid at the moment that the fluid enters the filler region, and sufficient degree of liquid-liquid contact is improved, so that removal of the alkali liquor on oily substances and COD in the sewage is realized.

The invention relates to a smoothing reactor coil manufacturing device, which comprises a glue plate, a support body placed above the glue plate, a winding die arranged on the periphery of the support body for coil winding, and a coil hanger above it; An upper busbar and a lower busbar are respectively welded to the upper and lower coil outlets of the winding die, and the lower busbar is installed on the glue-connecting tray and a suspension is provided on the glue-connecting tray. The invention has a simple structure, the winding mold is spliced ​​by steel pipes, and the production cost is low; the inner diameter of the coil and the tension force requirements during winding can be guaranteed; and the internal steel pipe is removed after the coil winding is completed, and the inner steel pipe does not need to be entered for internal operation, and the operation is convenient. At the same time, the coil sling and the crane are used for hoisting, the connection strength is reliable, and it is suitable for large-tonnage coils.

The invention discloses an inhaul cable protective sleeve with functional elements and a construction method thereof. The protective sleeve comprises an inner layer pipe, an outer layer pipe, reinforcing ribs fixedly arranged between the inner layer pipe and the outer layer pipe and cavity channels between the adjacent reinforcing ribs, and the inner layer pipe, the outer layer pipe and the reinforcing ribs are all made of plastic; the cavity channel penetrates through the two ends of the outer-layer pipe where the cavity channel is located. At least two sections of outer-layer pipes are arranged at intervals, and annular grooves are formed between the opposite end parts of the adjacent outer-layer pipes; a functional element is installed in the annular groove and connected with the outer-layer pipes at the two ends in a sealed mode. According to the inhaul cable protective sleeve with the functional element and the construction method of the inhaul cable protective sleeve, machining is easy, the sealing performance is good, and compared with the prior art, the inhaul cable is light in weight and small in cross sectional area, and the performance of the inhaul cable is not affected.

The invention discloses an induction coil winding device and a use method thereof. According to the winding device and the use method thereof, a plurality of cooling winding sleeves of the same or different specifications can be assembled according to different winding requirements to support and guide an induction coil, and a cooling device can be used for cooling and shaping the induction coil. The cooling winding device is characterized by comprising a supporting assembly, a cooling winding sleeve arranged on the supporting assembly and a conveying pipe arranged on the supporting assembly, the side wall of the cooling winding sleeve is of a hollow structure, and the cooling winding sleeve has various specifications and can be matched with the supporting assembly to be assembled according to different winding requirements; and the conveying pipe is matched with the supporting assembly to convey a cooling medium into the cooling winding sleeve to cool and shape the induction coil.

The invention discloses a lining part for pipe bending operation. The lining part comprises at least three outer blocks; all the outer blocks are fixed together through snap spring to form an olive-shaped hollow structure; the cross section of the hollow structure is matched with a pipe in shape; the outer blocks are provided with outer block internal teeth; an inner column is arranged in the hollow structure; the inner column is provided with inner column external teeth; the inner column is divided into a left inner column and a right inner column; and the left inner column and the right inner column are connected by a connecting device comprising a left universal ball, a right universal ball and a connecting rod, thus, by pulling the connecting rod, the inner column moves relative to theouter blocks, the outer blocks are inwardly contracted under the action of the snap spring, and the lining part is pulled out of the pipe. The lining part is simple in structure, when the lining partis tightly attached to the pipe, the lining part is pulled out smoothly after being bent, the inner diameter of a bent area of the pipe is effectively ensured, and the inner wall of the pipe is not liable to be damaged.

The invention belongs to the field of helicopter structure design, and provides an integrally-formed variable-section drainage channel. The variable-section drainage channel comprises a cup body 7, aguide pipe 8, a filter screen 9 and a protrusion 10. The variable-section drainage channel is integrally formed by melting metal powder through laser, the process is simplified, the number of parts isreduced, corrosion defects are avoided after long-term work in the marine environment, and the overall deformation of the parts is small.

The invention relates to a mouth mold and mold for forming a plastic pipe material. The mouth mold comprises a mold bell mouth supporting ring, a mold socket ring and a polytetrafluoroethylene ring. The inner side face of the mold socket ring is sleeved with the polytetrafluoroethylene ring; the bottom of the polytetrafluoroethylene ring extends outwards to form a connecting platform, and the endface of the connecting platform is provided with a dovetail groove; and the bottom of the mold socket ring extends outwards to form a spliced table which is matched with the dovetail groove. Accordingto the mouth mold and mold for forming the plastic pipe material, due to the inner side face of the polytetrafluoroethylene ring, sizing on the plastic pipe material is formed, so that the surface quality of the plastic pipe material can be improved; meanwhile, by forming the dovetail groove in a connection table, in cooperation with a spliced table at the bottom of the mold socket ring, the spliced table is made matched with the dovetail groove, and therefore due to the structural design of the dovetail groove and the spliced table, during heating expansion and deforming, the spliced table expands, the size of the dovetail groove changes small, and the spliced table and the dovetail groove can be matched more closely, so that the inner diameter size and the quality of polytetrafluoroethylene ring can be guaranteed.

A core-pulling aluminum tube drawing machine disclosed by the present invention relates to the technical field of non-ferrous metal pipe processing equipment, including a core-pulling mechanism, a feeding mechanism and a pulling mechanism, the core-pulling mechanism is installed at one end of the pulling mechanism, and the The feeding mechanism is installed on the top of the drawing mechanism; the core-pulling mechanism includes a core-pulling frame 1, a core-pulling rod chute 2, a core-pulling rod 6, a core-pulling mold core 7 and a core-pulling rod lifting cylinder; The rod chute 2 is installed on one end of the core-pulling frame 1, and one end of the core-pulling rod 6 can slide up and down in the core-pulling rod chute 2, and the core-pulling mold core 7 is mounted on the core-pulling rod 6 The other end of the core-pulling rod lifting cylinder is vertically installed on the lower part of the core-pulling frame 1, and the upper part of the cylinder shaft protruding upward carries the core-pulling rod 6. It has the characteristics of automatic pipe threading, automatic drawing, and high precision inside and outside the pipe. It can be used not only for drawing aluminum alloy pipes, but also for drawing other non-ferrous metal pipes.