32results about How to "Easy online replacement" patented technology

The invention discloses a reduced-pressure type backflow preventer which comprises a valve body, two check valves with the same structure and a drain valve, wherein a cavity is formed in the valve body, and a water inlet, a water outlet and a drain opening are formed in the valve wall of the valve body; the two check valves are fixedly mounted in the valve body through support pieces and are located at the water inlet and the water outlet respectively; the drain valve is mounted outside the valve body and located at the drain opening; each check valve comprises a valve seat, a valve clack, a rocker and a twins torsional spring; one side of each valve clack is hinged to the upper end of the corresponding valve seat, and rollers are mounted on the other sides of the valve clacks; the rockers are connected with the lower ends of the valve seats through pin shafts; the rollers are propped against the rockers and slide on the rockers; the pin shafts are sleeved with the twins torsional springs; and the spring forces of the twins torsional springs act on the rockers to keep the valve clacks in a normally-closed state, and the rollers on the valve clacks are enabled to roll on the rockers by external forces to realize the opening of the valve clacks. Owing to the twins torsional spring-rocker structures of the check valves, the reduced-pressure type backflow preventer achieves a better flow prevention effect.

The invention relates to a vacuum controllable high-flux heavy-caliber optical focusing and frequency conversion system and belongs to the technical field of optical focusing and frequency conversion. The vacuum controllable high-flux heavy-caliber optical focusing and frequency conversion system solves the problem that an integral structure of an existing optical focusing and frequency conversion system is not beneficial to on-line replacement. The vacuum controllable high-flux heavy-caliber optical focusing and frequency conversion system comprises a target window unit part, a frequency conversion unit part, a focusing lens unit part and a light beam measuring sampling part, wherein the tail end of the target window unit part is in sealing connection with a shell body at the head end of the frequency conversion unit part through a flange, the tail end of the frequency conversion unit part is in sealing connection with a shell body at the head end of the focusing lens unit part through a flange, the tail end of the focusing lens unit part is in sealing connection with a shell body at the head end of the light beam measuring sampling part through a flange, and an atmosphere chamber is formed by the target window unit part, the frequency conversion unit part and the focusing lens unit part. The mechanical structure is designed into a detachable assembly, and rapid replacement of each composition part and each internal assembly can be achieved by a rapid disassembly mechanism through corresponding hatches formed in the shell bodies. The vacuum controllable high-flux heavy-caliber optical focusing and frequency conversion system is applicable to the heavy-caliber optical focusing and frequency conversion.

A double-eccentric ultralow temperature butterfly valve comprises a valve body, a valve rod and a butterfly plate. The double-eccentric ultralow temperature butterfly valve is characterized in that a manhole is formed in the valve body, and an upper maintenance cover is arranged at the position of the manhole; a sealing component composed of a sealing ring, a pressing ring and a jacking and pressing component is included; the inner side face of the sealing ring is sealed with the butterfly plate, the jacking and pressing component comprises a locking ring, a plurality of jacking and pressing screws arranged on the locking ring and locking nuts connected with the jacking and pressing screws, the end portions of the jacking and pressing screws are pressed on the outer end face of the pressing ring, a circular bead face is arranged at the end, away from the pressing ring, of the locking ring, and a compression ring compressed on the circular bead face is inserted in the inner cavity wall of the valve body. Through the structure, the sealing ring is convenient to replace online, and the online maintenance of the valve body is more convenient and faster. In the maintenance process, only the upper maintenance cover needs to be opened, and the sealing component is dismounted one by one. In addition, the position of the pressing ring is controlled by adjusting the jacking and pressing screws, the compression amount of the sealing ring can be adjusted, and therefore the sealing performance of the valve is guaranteed, and the safe reliability of the valve is improved.

The invention discloses an elastic fiber dry spinning mechanism and a spinning component maintenance control method. The elastic fiber dry spinning mechanism comprises a spinning component which includes a temperature control part and a fiber spraying part which are overlapped with each other, and a rotary movement control part which is used for enabling the spinning component to rise and descend, move horizontally and rotate around a horizontal movement direction so as to change the facing direction of the spinning component to a direction where the maintenance of the fiber spraying part can be facilitated. The spinning component maintenance control method includes the following steps that: the spinning component is made to rotate around the horizontal movement direction so as to change the facing direction of the spinning component to a direction where the fiber spraying part can conveniently spray fibers towards a spinning box; the spinning component is made to move horizontally so that the spinning component can be aligned with the spinning box along a vertical direction; and the spinning component can be lowered so as to be connected with the spinning box. With the elastic fiber dry spinning mechanism and the spinning component maintenance control method of the invention adopted, maintenance of the fiber spraying part such as online replacement is convenient and fast, high maintenance efficiency can be realized.

The invention relates to the technical field of power transmission protection equipment and discloses an aluminum equalizing ring for insulators, which comprises an equalizing ring body. The equalizing ring body includes a small equalizing ring, a medium equalizing ring and a large equalizing ring; adjusting bars are threadedly mounted at the bottom of the small equalizing ring in nested manner; afixing socket bar is movably mounted at the bottom of each adjusting bar in sleeving manner; the bottoms of the fixing socket bars are fixedly connected to the top of the medium equalizing ring. Thealuminum equalizing ring for insulators is provided with openings which may act as discharge gaps; when too much electric charges are accumulated, self-discharging can occur to allow relief; the operation demand of a + / -8000 kV DC line can be well met; the ends of insulators can be well protected from being eroded by an electric field; online replacement and installation are also facilitated; linemaintenance cost is greatly reduced; the good material also helps effectively avoid rusting and ensure long-term reliable operation; the aluminum equalizing ring for insulators has good market application prospect and social and economic benefits.

The invention relates to a hydraulic differential butterfly-shaped water pump control valve. The hydraulic differential butterfly-shaped water pump control valve comprises a valve body assembly, a rocker arm (11), a buffering oil cylinder (15), an oil line control assembly and a differential driving assembly (8), wherein the valve body assembly comprises a valve body (1), a spindle (6), a butterfly plate (2), a valve seat (5) and an end cap assembly (4); the butterfly plate (2) is fixed on the spindle (6); the spindle (6) is in drive connection with the buffering oil cylinder (15) through the rocker arm (11); the differential driving assembly (8) consists of a water pressure assembly and an oil pressure assembly which drive each other; a water inlet valve (812) and a water drainage valve (811) are arranged on the water pressure assembly; the water inlet valve (812) is connected with a valve front water tube; and the oil pressure assembly is connected with the oil line control assembly. Compared with the prior art, the hydraulic differential butterfly-shaped water pump control valve only needs pressure of a valve front water system and does not need other external force driving sources during working, and has functions of slowly opening at the initial opening stage and slowly closing at the later closing stage.

An energy-saving resistance-free check valve comprises a valve body, a valve clack and a valve deck. A valve rod is arranged in the valve body. The axial direction of the valve rod is perpendicular to the axial direction of a medium inlet. The valve rod penetrates through the upper portion of a valve cavity. The two ends of the valve rod extend out of the front side and the rear side of the valve body respectively. A rotating pair is arranged between the valve rod and the valve body. A rocker is connected to one side of the valve clack. The upper end of the rocker is connected with the valve rod. A limiting device is connected to the bottom side of the valve deck. The front side and the rear side of the valve body are respectively provided with a hydraulic slow-closing device. According to the energy-saving resistance-free check valve, gravity and buoyancy enable a medium to pass through the valve body fully without resistance when the valve clack is fully opened, so that the work efficiency of a water pump is improved, power consumption is lowered, and the energy-saving effect is achieved; since the valve body is in a streamline form, the medium cannot deposit in the valve cavity, and the energy-saving resistance-free check valve is suitable for conveying media with particles prone to deposition; in the closing process, water hammer can be effectively reduced, and damage of the water hammer to a pipeline and valve equipment is lowered; under the condition that the pressure of return water is very low, sealing can be guaranteed, and therefore the conveying medium can be effectively prevented from flowing back in the quick-closing process.

The invention discloses a nozzle anti-blocking spray gun for molten iron desulfurization injection, which is composed of a connecting section, a gun body section and an injection section, the connecting section is sequentially composed of a connecting flange and a composite gun core, and the composite gun core is from the inside to the The outside includes an inner intubation tube, a main pipe and a strengthening tube in turn, an inner intubation tube connector is installed on the inner wall of the bottom end of the strengthening tube, and a hollow fixing groove is opened at the lower end of the inner intubation tube guide, and a fixed groove is installed in the fixing groove The graphite blowing tube, the main pipe is fixed on the inner wall of the upper end of the inner insertion tube guide, and the inner insertion tube is inserted into the graphite injection tube through the inner insertion tube guide. The invention realizes the comprehensive purposes of preventing the spray gun from clogging, facilitating maintenance and replacement of clogged parts, prolonging the service life of the spray gun, reducing the maintenance cost of the spray gun and the consumption of desulfurizing agent, and improving the operation rate of desulfurization production.