9results about How to "Reliable maintenance" patented technology

The application discloses a servo cut-off valve group, which comprises a first valve body and a second valve body integrated on a valve seat. Both the valve bodies are provided with valve cavities, and the valve cavities are internally provided with valve spools driven by a servo motor through a screw rod. The valve bodies are provided with outer ring channels communicated with inlet and outlet of the valve seat on the side surfaces, the outer ring channels are communicated with the valve cavities through a plurality of uniformly distributed lateral flow channels, and the inner walls of the valve cavities are further provided with inner ring channels. The longitudinal flow channels at the bottoms of the two valve cavities are communicated with each other through channels in the valve seat. When the two valve spools synchronously rise above the lateral flow channels, fluid can sequentially pass through the flow channels, and the valve is opened; when the two valve spools synchronously descend to completely cover the lateral flow channels, the valve is closed. The two valve cavities are communicated at the bottoms to form a pressure balance cavity, so that the valve spools are hardly subjected to axial thrust when the valve is closed, and high pressure is converted into sealing force in the radial direction of the valve spools, thereby fundamentally solving the high pressure leakage problem of traditional cut-off valves, and the application is especially suitable for high pressure equipment such as filter presses.

The utility model belongs to the technical field of gas extraction pipeline water drain, specifically is a kind of coal mine gas extraction pipeline water drain. Include: extraction pipeline, the extraction pipeline is horizontally arranged, and the opening is set in extraction pipeline bottom;Water drain main part, the water drain main part is connected in extraction pipeline bottom, and is communicated with opening;The top of water drain main part is equipped with the water inlet that is communicated with extraction pipeline, bottom is equipped with drain, the inside of water drain main part is equipped with check valve for controlling water accumulation discharge;The check valve includes valve seat and the ball float for sealing this valve seat, ball float is arranged on limit rod, limit rod is provided with return spring, and return spring supports ball float.The utility model effectively solves the problem of small volume and easy water accumulation caused by the height restriction of traditional vertical water drain.

An access node transmits, in a downlink signal having a series of subframes, a beam-formed reference signal in subframes, where the beam-formed reference signals are transmitted in fewer than all of the subframes of the downlink signal. A first subset includes beam-formed reference signals corresponding to a first frequency or first localized range of frequencies, and a second subset includes beam-formed reference signals corresponding to a second frequency or second localized range of frequencies. The second frequency or second localized range of frequencies is spaced apart from and differing from the first frequency or first localized range of frequencies. A user equipment, UE, receives, in the downlink signal, the beam-formed reference signal in each of a plurality of subframes. The UE performs mobility management measurements using at least the first subset of the received beam-formed reference signals and performs RLM using the second subset of the received beam-formed reference signals.

The present invention relates to the field of the transportation and storage of thermally labile goods such as pharmaceuticals, and to a container system and apparatus employing a total loss evaporation agent such as dry ice. In particular, but not necessarily restricted thereto, the present invention relates to a system for the transportation and temperature controlled storage of ultra-low temperature, low volume, high value goods.

The invention provides a composite material ground terminal phased array antenna housing forming device and method, and relates to the technical field of antenna housing forming. The composite material ground terminal phased array antenna housing forming equipment comprises a drying oven, a plurality of ventilation holes are formed in the drying oven, lifting plates are arranged on the two sides of the inner wall of the drying oven in a sliding mode respectively, frames are arranged on the lifting plates in a sliding mode, and leveling plates are movably arranged in the frames; the thickness of the side walls of the two sides, making contact with the lifting plate, of the frame is larger than that of the other two sides, sliding grooves are formed in the side walls of the two sides, making contact with the lifting plate, of the frame respectively, the bottoms of the plummets are made of magnetic metal materials, and the positions of the magnetic attraction blocks correspond to the positions of the plummets in a one-to-one mode. According to the invention, the leveling plate which can be manually leveled is arranged in the drying oven, so that a worker can level the leveling plate which is in direct contact with the mold, and the mold and a to-be-formed antenna housing can be in a horizontal state, so that the forming quality of the antenna housing is ensured.

The application discloses a mold vertical warehouse, and relates to the technical field of storage equipment, which comprises a sand blasting device, an oil spraying device, a mold rack and a main control cabinet. The sand blasting device is used for spraying sand on the mold when the mold is stored in the warehouse, so that the surface treatment of the mold is realized. The oil spraying device is used for spraying rust-proof oil on the mold when the mold is stored in the warehouse, so that the maintenance of the mold is realized. The mold rack is provided with a plurality of storage stations for storing the mold, so that the storage of the mold is realized. The mold vertical warehouse further comprises a walking track extending to the sand blasting device, the oil spraying device and the mold rack, and a carrying robot slidably arranged on the walking track. The carrying robot can take and place the mold and drive the mold to move between the sand blasting device, the oil spraying device and the mold rack. The mold vertical warehouse disclosed by the application can realize the automatic storage and withdrawal of the mold. Before the mold is stored in the warehouse, the mold can be automatically cleaned, polished, maintained and lubricated, so that the reliable storage and maintenance of the mold are realized.

The utility model discloses a cut big and medium -sized casting with wet dust removal device belongs to dust purification field. Including frame main part, antechamber drive double speed reducer, fire -retardant fire -resistant cloth, explosion -proof lighting warning light, walking track and supporting parts, controlling means, dust fog filter, off -wind machine, flue gas exhaust pipe. The water in equipment water tank is promoted to form circulating water curtain with the negative pressure of off -wind machine. The air containing smoke dust is first impacted with water curtain under the action of certain airflow organization, and part of the viscosity material in it is intercepted in water. Then pass through water screen and enter the air -water channel, and the water in the channel produces strong stirring and mixes, and the particulate matter is completely cleaned to water. After a part of water follows airflow organization and enters the gas collecting box, air -water separates, and the treated gas passes through the water baffle and is discharged to the atmosphere through the off -wind machine, and the separated water flows into the overflow tank after gathering in the gas collecting box, and overflows from the overflow tank to the water flooding board to form a water curtain, and the cycle is repeated, and the smoke dust is removed.

The utility model discloses a battery box structure and battery package, battery box structure includes: box, protection cover and antenna board, and the box is equipped with assembly opening, protection cover is equipped with the rim buckle connection of assembly opening with the box, and the cover encapsulation assembly opening, and the material of protection cover is plastic, and the antenna board is connected with protection cover. First, protection cover adopts plastic material, avoids the shielding and interference of metal to antenna board signal, and has promoted the signal quality and communication stability of system. Secondly, protection cover buckle connection with the box makes the sealing property of assembly opening improve greatly, prevents dust and water vapor and other external factors from entering the box effectively, thereby has strengthened the security and service life of battery box internal element. In addition, the buckle type connection mode is convenient for the dismounting of protection cover and antenna board, provides great convenience for the subsequent maintenance, overhaul and antenna board replacement, and has improved the maintainability of product.

The utility model discloses a modular angle self -adaptation PE perforated pipe belongs to perforated pipe technical field, including perforated pipe, the lower extreme of perforated pipe is connected with the bellows of screw thread, the perforated pipe includes the perforated pipe body, the upper fixed joint of perforated pipe body has the outer sleeve, the lower fixed joint of perforated pipe body has the inner sleeve, the inside surface of outer sleeve is equipped with positive thread no.