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

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 relates to a preparation method of a quadrate foil type coil insulation paper roll, which belongs to the technical field of transformer coil production process. The technical scheme comprises the following process steps: (1) a paper panel is cut to meet requirements in a drawing for width, and curtain type oil groove is bond well; (2) the curtain type oil duct and the paper panel are laminated; (3) the bond paper panel and the curtain type oil duct are arranged on a mould; (4) a copper coil is wrapped by exerting slight tension or no tension; and (5) after a paper coil is completed by wrapping, the last support strip of the curtain type oil duct is just arranged on the upper part of the bond position of the paper panel. The invention has the advantages that the contact between the copper coil and the paper panel and between the mould and the paper panel is favorable by winding the copper coil to wind the paper panel and the curtain type oil duct on the mould along with the copper coil, the inner diameter of the coil is ensured, deflection of the copper coil because of the gap between the paper panel roll and the mould is reduced, the time for making the paper roll isomitted, working efficiency is increased, and thus, the aim that one stone kills two birds is achieved.

The invention belongs to the field of helicopter structure design. The present invention provides an integrally formed discharge channel with variable cross-section. The cup body 7, conduit 8, filter screen 9 and protrusion 10 of the variable-section discharge channel are integrally formed by melting metal powder by laser, which simplifies the process and reduces the number of parts. Long-term work in the marine environment does not produce corrosion defects, and the overall deformation of the parts is small.

A light emitting container comprising a trunk unit for forming a discharge space and a terminal unit into which an electrode member is inserted, both units being integrally formed from a transparent ceramic material, wherein at least the middle region of the trunk unit is smaller in wall thickness than the terminal unit and the boundary region between the terminal unit and the trunk unit and the inner diameter of the terminal unit is about 2 mm or smaller.

A brake piston manufacturing method is provided to simplify the process of making a piston, thereby improving productivity and work efficiency. CONSTITUTION: A brake piston manufacturing method comprises steps of: putting a material(100) into a first forming dies, pressing a first forming die of a first former cold forming machine to the material to process a position setting groove on the top of the material, putting the material into a second dies, pressing a second forming die of a second former cold forming machine to the material to process a first hollow portion(102) inside the material, putting the material into a third forming dies, pressing a third forming die of a third former cold forming machine to the material to chamfer a flow hole processing surface on the periphery of the first hollow portion of the material, putting the material into a fourth forming dies, pressing a fourth forming die of a fourth former cold forming machine to the material to process a third hollow portion(104) extended from the first hollow portion within the material.

The invention discloses a downhole hollow oil well pump. The downhole hollow oil well pump comprises a barrel body, wherein a hollow piston rod anchored down a well is arranged inside the barrel body; an upstream end of the piston rod is closed; a downstream end of the piston rod is provided with a well fluid inlet; a sealing sleeve fixed to the barrel body sleeves the piston rod; the sealing sleeve and a sealing structure of the piston rod divide an inner cavity of the barrel body into an upper chamber, a middle sealing chamber and a lower chamber; first oil introduction holes connected with the middle sealing chamber are formed in the side wall of the piston rod; the first oil introduction holes are coated with first elastic sealing parts; second oil introduction holes connected with the middle sealing chamber and a space outside the barrel body are formed in the sealing sleeve; and the second oil introduction holes are coated with second elastic sealing parts. According to the downhole hollow oil well pump, simulated production can be achieved, a stable working condition is reached, a testing tool is controlled through lifting and putting down a continuous oil pipe to test capacity conditions of all layers, a good sealing property is achieved, inner diameters are sufficiently guaranteed under the condition that outer diameters are the same, and the downhole hollow oil well pump is particularly applicable to production testing of high-inclination wells and horizontal wells.

The invention relates to equipment for producing a water hose, which comprises an outer forming die, an inner last die, an extruder and nip rolls matched in pairs up and down, wherein the extruder is provided with an extruder head; the outer forming die, the inner last die, the extruder head and the nip rolls are arranged from the back to front in turn; the shape of the cross section of the outerforming die comprises two up and down horizontal U-shaped outer sleeves; the upper wing of the upper U-shaped outer sleeve and the lower wing of the lower U-shaped outer sleeve are integrated into a whole through a side plate; and the shape of the cross section of the inner last die comprises an upper horizontal transverse plate and a lower horizontal transverse plate, an upper vertical plate anda lower vertical plate. The invention also provides a process for producing the water hose. The equipment and the process can improve the speed of the water hose production, have simple and ingeniousequipment structure, and easy processing technique and operation, and ensure the accurate inside diameter of the water hose.

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.