9 results about "Integrally closed" patented technology

The utility model relates to the technical field of expansion valves, in particular to an electronic expansion valve and an air conditioning system. The electronic expansion valve comprises a valve body assembly and a valve element assembly, a valve port is formed in the valve body assembly, and the valve element assembly is movably installed in the valve body assembly and used for controlling opening and closing of the valve port. The valve element assembly comprises a screw rod, a bearing and a valve needle, the bearing is located between the screw rod and the valve needle, and one end of the screw rod penetrates through an inner ring of the bearing and is fixedly connected with the bearing. The valve needle is fixedly connected with the outer ring of the bearing, and the screw, the bearing and the valve needle can be integrally close to or away from the valve port in the axial direction. According to the electronic expansion valve and the air conditioning system, the problem that the cost is increased due to the fact that the connecting structure between the screw and the valve needle of an existing electronic expansion valve is complex is solved.

The utility model relates to a sealing ring for sealing a graphite pipe and a pipe plate, which comprises a sealing main body, and the appearance of the sealing main body is any one of a square, a circle and an ellipse. The sealing body is of an integrated structure in sealed connection, a sealing groove is formed in the bottom face of the sealing body, expansion filler is arranged in the sealing groove, and particularly, the expansion filler is sodium polyacrylate. After the sealing ring is assembled, initial sealing with low pressure is formed, the expansion filler is expanded when meeting water in a water pressure test, the sealing pressure is increased, the designed sealing pressure is achieved, and therefore the high sealing effect is achieved. Compared with a graphite heat exchanger adopting an O-shaped sealing ring, the graphite heat exchanger adopting the sealing ring is simpler in structure and high in practicability, the tube bank density can be increased by more than 40%, the appearance of the heat exchanger is reduced, and the cost is reduced.

The present application is a kind of full hydraulic constant roll gap straightener, comprising, high stiffness frame, be integrally closed force frame structure arrangement;Roller system device, including upper roller system and lower roller system;Upper movable crossbeam, the straightening force of upper roller system is transmitted to high stiffness frame;Self-adapting roll gap adjustment mechanism, including multiple independent and self-adapting adjustment hydraulic cylinders, the top of each hydraulic cylinder is connected to high stiffness frame, the bottom of each hydraulic cylinder is abutted to the top of upper movable crossbeam;Multi-point bending roll compensation mechanism, fixedly connected to upper movable crossbeam and upper roller system, including multiple rows of bending roll compensation units, for dynamic compensation when straightening the elastic deformation of upper roller system and dynamic adjustment the crown of upper roller system;Main transmission system;Roll changing system.The present application realizes the presetting and dynamic compensation of roll gap through self-adapting roll gap adjustment mechanism and multi-point bending roll compensation mechanism, can realize the dynamic maintenance of roll gap constant, the straightening process is stable, the degree of automation is high, the roll changing rhythm is fast, and the safety protection is reliable.

The invention relates to the field of machining, in particular to a method for machining an integrally closed impeller through cooperation of a planing table type boring machine and a vertical rotating table. According to the method, machining is achieved through cooperation of a planing table type boring machine and a vertical rotating table; a vertical rotating table (2) is additionally arranged on a rotating table (5) of the planing table type boring machine; the vertical rotating table relatively fixes the bottom of a workpiece (4) to be machined through a connecting structure (3); the workpiece to be machined is a blank of the integral closed impeller; the rotary worktable (2) is a vertical worktable; a rotating motor of the rotating table (2) rotates to drive a to-be-machined workpiece (4) to rotate for machining; the planing table type boring machine is matched with the integrated high-precision vertical rotating table to form a new linkage machining system, the machining state in the runner is clearly visible at the horizontal machining view angle, and real-time monitoring is facilitated; and cuttings are convenient to discharge. A boring rod of the spindle power system (1) is slender and telescopic, and interference in the machining process is small.

The utility model discloses a rain-proof and snow-proof thermal insulation tunnel for a welded rail base roller line, which is erected on the roller line and comprises a fixed frame, a fixed side rain-proof and snow-proof baffle and a movable side rain-proof and snow-proof baffle. Wherein the fixing frame is arranged on the roller line along the roller line. And the bottom edge of the fixed side rain-proof and snow-proof baffle is fixedly connected with the long edge of one side of the fixed frame. The movable side rain and snow prevention baffle is provided with a movable side top plate and a movable side plate; the bottom edge of the movable side plate is hinged to the long edge of the other side of the fixing frame, and a hinge shaft is connected with a driving motor; one side edge of the top plate is fixedly connected with the top edge of the side plate, and the other opposite side edge is connected with the top edge of the fixed side rain-proof and snow-proof baffle. Therefore, the movable side plate is opened / closed through the driving motor, the upper part of the steel rail is communicated with the outside in an opening state, and hoisting operation can be carried out; after the movable side plates are closed, an overall circumferentially-closed tunnel is formed, and high-temperature steel rail welding seams can be prevented from making contact with rain and snow; therefore, normal operation of the roller way can be effectively guaranteed, and the service life of the roller way is prolonged.

The application relates to an integrally closed double-cover closed interface of electrical auxiliary equipment, which comprises a shell, an outer cover, an inner cover and an interface module. The shell comprises a bottom plate located at the bottom and a side plate surrounded at the periphery of the bottom plate, and forms a shell inner cavity with an open top end. A through hole is arranged at the center of the bottom plate and is used for embedding and installing the interface module. The inner cover covers the hole near the shell inner cavity, and forms an inner layer protection. The outer cover comprises a cover plate and a linkage closing connecting rod. The cover plate covers the opening of the shell inner cavity. One end of the linkage closing connecting rod is fixed to the inner wall of the cover plate, and the other end is hinged to the side plate, which is used for hinging opening and closing of the whole outer cover and linkage closing of the inner cover. The cover plate far from the hinge end of the outer cover is locked with the bottom plate through pressing self-locking buckles. The interface is covered by double protective covers, has the structural characteristics of sequentially opening and linkage closing, avoids the mistaken contact of the interface module, and improves the water and gas tightness and the electromagnetic shielding protection effect of the whole shelter.

This invention discloses a steel-shell composite girder structure and its optimized design method for filling ultra-high performance concrete (UHPC) within a steel shell. It relates to the field of steel-concrete composite structure technology. The key technical points are: the invention welds and fixes the lower steel plate of the bridge deck's steel shell to the upper chord and upper crossbeam of the truss, creating a continuous connection between the upper chord and the lower steel plate, forming an integrally closed frame structure with the side plates of the steel shell. During UHPC pouring, the continuity between the upper chord and the lower steel plate avoids the problem of phased pouring. This frame structure also serves as a permanent formwork for the UHPC pouring and a part of the structural load-bearing capacity, thereby enhancing the integrity between the bridge deck and the truss. By arranging perforated I-beams, shear bolts, and transverse reinforcement details between the bridge deck's steel shell, a good combination of UHPC and steel shell is achieved, forming an integrated steel-shell-UHPC composite bridge deck system, improving the bridge deck's stiffness and load-bearing capacity.

The present invention relates to an electrolytic machining device and method for an integral closed blade ring channel, and belongs to the field of electrolytic machining technology. The invention seeks the optimal installation angle of the workpiece according to the degree of distortion of the channel, that is, the end face of the workpiece is installed at a certain angle to the coordinate axis X of the machine tool. At this angle, the blade basin and back margins on both sides of the channel projected by the cathode along the X-axis are uniform. During machining, the cathode is fed along the Y-axis, and the workpiece is fed along the X-axis while rotating along the C-axis to achieve twisted channel machining. Since the workpiece is installed at an angle to the cathode, an inlet liquid sealing device is designed to ensure the stability of the flow field in the initial machining stage. The flow field will change drastically at the moment the blade ring channel is opened, and an outlet liquid sealing device is designed to achieve flow field stability in the final stage of machining. The tilted installation of the workpiece reduces the angle of rotation of the workpiece during feeding, thereby improving machining efficiency and accuracy.

The invention provides a novel roof structure of a stainless steel metro vehicle and a railway vehicle, the roof structure is a closed cavity-shaped roof structure composed of an upper-layer roof plate structure, a lower-layer roof plate structure and a middle-layer corrugated plate, and end camber beams are arranged at the two ends of the roof structure. A local opening structure adopts a cross beam and longitudinal beam structure with a C-shaped section for reinforcing design, the overall structure is uniform, structural sudden change and stress concentration do not exist, and overall rigidity supporting and vehicle longitudinal load transmission are better facilitated; when bearing a vertical load, the integral closed cavity-shaped structure and the middle hollow corrugated structure can effectively transmit the load and prevent larger deformation through the characteristic of good vertical rigidity of the integral closed cavity-shaped structure and the middle hollow corrugated structure; and when bearing a longitudinal load, a load transmission path is smooth, and no structural sudden change exists.