8 results about "Packing pressure" patented technology

This utility model discloses a self-circulating saturated water heat extraction system, which includes a reactor metal cylinder, a steam drum jacket outside the reactor metal cylinder, a steam drum heating rod inside the steam drum jacket, and a steam drum insulation on the outside. The steam drum jacket is filled with metal packing, and a packing pressure plate is located at the top of the steam drum jacket. The packing pressure plate has multiple small holes and multiple steam guide pipes. The top of the steam drum jacket is connected to the end cap at the bottom of the tube side of the steam condenser through a steam-condensate flow pipe. The end cap at the top of the tube side has a vent, a cooling water inlet is located at the bottom of the shell side, and a cooling water outlet is located at the top of the shell side. Because the steam drum contains saturated water, even a small increase in the reactor surface temperature will locally disrupt the temperature and pressure balance of the water, causing the water in contact with the reactor surface to vaporize. Simultaneously, since water vaporization requires the reactor wall to transfer heat equivalent to the latent heat of water vaporization, the system achieves the purpose of rapidly removing the heat released by the reaction.

The present application relates to a kind of pumping unit polish rod wellhead sealing method, pumping unit sealing packing, belong to oilfield production engineering technical field.The polish rod wellhead sealing method of pumping unit of the present application, comprising the following steps: take annular washer and put into wellhead packing box cavity bottom on polish rod, then in packing box cavity alternately put into rubber strip and semi-solid lubricant, until to fill up packing seal box, then take annular washer and put into polish rod, install good gland and packing pressure cap, tighten;When putting into rubber strip, make rubber strip surround polish rod and place and in packing box cavity fill up a layer.The polish rod sealing method of pumping unit of the present application, completely solve the problem of difficult to add and take when replacing packing packing, reduce the labor intensity of post worker, especially applicable to the oil well of on-site polish rod not centering, and sealing effect is good, can effectively manage packing running, leaking and leaking phenomenon, reduce wear and tear, extend the use cycle of packing, realize the purpose of cost reduction and efficiency increase and energy saving and environmental protection.

This invention relates to the field of valve technology and discloses a C-type wear-resistant ball valve with a non-external leakage double stuffing box system for cryogenic devices. The valve valve includes: a valve body with a horizontally oriented through-flow channel inside; a valve seat embedded in the valve body; a valve seat sealing ring on the valve seat; a C-shaped ball that mates with the valve seat in the center of the valve body's inner cavity; a valve stem connected to the upper end of the C-shaped ball; a valve cover at the upper opening of the valve body; a first packing inside the valve cover, fitted onto the outside of the valve stem; a first packing sleeve at the upper end of the first packing; a bracket at the upper end of the valve cover; a second packing inside the bracket, fitted onto the outside of the valve stem; a second packing sleeve at the upper end of the second packing; a packing pressure plate at the upper end of the second packing sleeve; and a control module electrically connected to the C-shaped ball and an operating device. The control module controls the operation of the operating device. This invention ensures reliable sealing through its double stuffing box structure.

The application discloses a kind of based on mould temperature field self-adaptive control's recycled material injection molding method, it is characterized in that including following steps: (1) benchmark modeling: obtaining benchmark data, establishing the benchmark correlation model of recycled material physical property and injection molding parameter;(2) initialization mould temperature field data: construct global temperature field acquisition link, select effective temperature measuring point;(3) data real-time acquisition: real-time acquisition mould cavity global temperature dynamic change and pre-processing, calculate pre-processing data set;(4) calculate control parameter: the data of real-time acquisition are compared with data, and parameter adjustment amount is calculated;(5) execute linkage control: according to parameter adjustment amount adjustment mould temperature machine power and cold water flow, and adjust injection speed and packing pressure of injection molding machine;(6) closed-loop optimization: whether need optimization correction control coefficient is judged.The beneficial effects of the application are that this recycled material injection molding method can significantly improve product yield and reduce defects.

The utility model relates to the technical field of sealing, and discloses a spring energy storage U-shaped packing which comprises a packing body and a U-shaped spring, the cross section of the packing body is in a U shape, tooth-shaped sawtooth edge elastic pieces are arranged on the two sides of the packing body, the two elastic pieces are symmetrical with the center line of the cross section of the packing body as the symmetry axis, the cross section of the U-shaped spring is in a U shape, and the U-shaped spring is in a U shape. Rectangular through holes located in the same center line are formed in the inner side and the outer side of the packing body, and the U-shaped spring and the packing body are overlapped and connected through steps to form a spring energy storage structure. A 90-degree right-angle-shaped step is arranged in the packing body, and the U-shaped spring is provided with a connecting step matched with the right-angle-shaped step. According to the U-shaped packing capable of storing energy through the spring, the U-shaped spring and the packing body are close to each other and coincide with each other, so that the packing can form certain tension to achieve initial sealing, and the sealing performance of the packing is improved. And meanwhile, the packing has the characteristics of pressure resistance, high temperature resistance, acid and alkali resistance improvement, long service cycle and the like.

The utility model relates to the technical field of angle valve sealing for coal chemical industry, in particular to a packing pressing sleeve and sealing structure of an adjusting angle valve for coal chemical industry, which comprises a pressing sleeve body with an axial through hole in the middle. The packing structure comprises a packing pressing plate, a packing box, sealing packing, a valve rod and a packing pressing sleeve. The sealing pressing sleeve is reasonable and compact in structure and convenient to use, double sealing is achieved between the sealing pressing sleeve and the valve rod through the sealing ring installed in the sealing ring installation groove and the sealing grease filled in the spiral sealing groove, and a single-stage sealing structure between the stuffing box of the adjusting angle valve and the valve rod is upgraded to a triple sealing structure. The sealing effect between the adjusting angle valve and the valve rod is effectively enhanced; the sealing grease in the spiral sealing groove can effectively lubricate the valve rod, the friction coefficient of the valve rod is reduced, and the abrasion degree between the filler and the valve rod is reduced; through the composite wear-resistant layers arranged on the inner side of the pressing sleeve body and the outer side of the valve rod, the wear resistance of the inner wall of the pressing sleeve body is enhanced, and the erosion resistance of the pressing sleeve body is improved.

The utility model discloses a plastic particle packing machine with a weighing function, which belongs to the technical field of packing machines and comprises a weighing platform, a weighing seat is arranged below the weighing platform, a pressure tightening mechanism is arranged above the weighing platform and comprises a driving cylinder, a pressurizing sleeve frame, an extruding plate and an electric heating plate, the driving cylinder is arranged above the weighing platform, and the pressurizing sleeve frame is arranged above the extruding plate. The pressurizing sleeve frame is fixed to the output end of the driving air cylinder. By means of the pressure tightening mechanism, the packaging mode arranged on the electric control panel according to the material and density of plastic particles is operated, so that the air inlet amount and the stroke position of the air cylinder can be adjusted, the packaging pressure can be controlled, the pressure of the air cylinder is determined by the air inlet amount of the air cylinder, and the packaging efficiency is improved. And the stroke of the air cylinder determines the compression degree of the packaged objects, and when the pressurizing sleeve frame reaches the set packaging pressure, the electric heating plate on the extrusion plate is electrified for heating and carries out hot-pressing sealing and packaging treatment on a packaging bag opening.

The invention discloses a reworked material injection molding method based on self-adaptive control of a mold temperature field, which is characterized by comprising the following steps: (1) reference modeling: acquiring reference data, and establishing a reference correlation model of reworked material physical properties and injection molding parameters; (2) initializing mold temperature field data: constructing a global temperature field acquisition link, and selecting effective temperature measurement points; (3) data real-time collection: collecting dynamic changes of the global temperature of the mold cavity in real time and preprocessing the dynamic changes, and calculating a preprocessed data set; (4) calculation of regulation and control parameters: performing data comparison on the data acquired in real time, and calculating a parameter regulation quantity; (5) linkage regulation and control are executed, specifically, the power and the cold water flow of the mold temperature controller are adjusted according to the parameter adjusting quantity, and the injection speed and the dwell pressure of the injection molding machine are adjusted; and (6) closed-loop optimization: judging whether the control coefficient needs to be optimized and corrected or not. The reclaimed material injection molding method has the beneficial effects that the product yield can be remarkably improved, and defects are reduced.