31results about How to "Reliable expansion" patented technology

The present invention provides an upsetting method capable of unevenly expanding the diameter of a portion to be expanded in the circumferential direction of a blank. A guide body (20) having an insertion hole (21) through which the planned diameter expansion portion (2) of the holding blank (1) is inserted in a vertical bending preventing state is prepared. A protruding piece portion (22) for suppressing diameter expansion that protrudes in the axial direction of the guide body (20) is integrally provided on a part of the front end portion (20a) of the guide body (20). The predetermined diameter expansion portion (2) of the blank (1) fixed in the stationary mold (10) is inserted and held in the insertion hole (21) of the guide body (20). Next, while moving the punch (30) and pressing the portion (2) of the blank (1) to be enlarged by the punch (30) in the axial direction, the guide body (20) is directed toward the punch (30) is moved in the opposite direction of the moving direction, whereby the planned diameter expansion portion (2) of the blank (1) exposed between the front end portion (20a) of the guide body (20) and the fixed mold (10), The diameter expansion is performed in a state where the diameter expansion is suppressed for the contact portion of the planned diameter expansion portion (2) with the protruding piece portion (22).

An expandable tubing assembly comprises a tubular connector defining overlapping longitudinal slots, the connector comprising end portions and an intermediate portion. The slots extend over the whole length of the connector, but the only slot overlap occurs in the intermediate portion. The assembly further comprises lengths of expandable tubing defining overlapping longitudinal slots and having end portions defining nodes between and beyond the ends of the tubing slots. Tubing threads are formed on the end most tubing nodes. The connector end portions define threads and are coupled with the threads formed on the nodes of the respective end portions of the tubing lengths.

An array linkage type solar energy two-degree-of-freedom tracking system comprises a supporting mechanism, a tracking mechanism, a linkage mechanism, and a driving device, wherein the supporting mechanism supports a battery panel tray by using a cardan joint and a vertical shaft; the tracking mechanism is connected to a transmission gear by using the linkage mechanism, the driving device is connected to the linkage mechanism, the linkage mechanism is connected to a tracking crank by using a linkage diverter and a linkage connecting rod, and performs successive disjunction distribution and winding cascading on two types of linkage nodes a and b along an azimuth angle (or altitude angle) linkage direction by using a steel wire rope, to implement power transmission between nodes in an array. According to the present invention, the quantity of driving devices and the quantity of sensors are reduced, a structure is relatively simple, and array linkage type solar energy two-degree-of-freedom tracking is implemented with low costs, so that not only a solar energy utilization ratio is improved, but also a geography adaptive capacity is enhanced, and array expansion is simpler and more convenient; and the quantity of battery panel components carried by a single tracking device is greater, and an area is larger.

The invention relates to an ablation catheter device with a mapping function. The device comprises a handle, a wire, a pulse generation circuit, an operation control device, a metal valve, a first catheter and a flexible circuit, wherein the first catheter is located at the far end of the handle, the far end of the first catheter is movably connected with a second catheter, the second catheter and the first catheter are mutually nested, and a catheter head is arranged at the far end of the second catheter; the metal valve is sheet-shaped, one end of the metal valve is connected with the first catheter, the other end of the metal valve is connected with the second catheter, the flexible catheter comprises a non-conductive base material, and the non-conductive base material is fixed on the outer surface of the metal valve; a conductive layer is fixed on the outer surface of the non-conductive base material; and a non-conductive covering material partially covers the outer surface of the conductive layer, and the non-covered part of the conductive layer forms an electrode. The device has the advantages that the device can be well attached to endocardium tissue, ablation and mapping can be achieved, the ablation range and angle are reasonable, and operation is convenient.

A fluid container for packing a product includes a check valve for each container member. A bonding structure of check-valves to a fluid container and a production method and apparatus of fluid container are disclosed in detail where the check valve is capable of reliably keeping the expansion of the fluid container without any fluid leakage after inflating the fluid container. As the check-valve is bonded to only one of thermoplastic container films, both films of the check-valve are fixed to one of the container films, thereby preventing the reverse flow by tightly closing the check valve. The manufacturing apparatus includes an up-down roller controller which precisely positions the films to form the check valve. The manufacturing apparatus can produce the fluid container with high reliability by having a belt conveyor specially designed for cooling down the heat sealed films before separating from the belt conveyor without damage.

The invention relates to a leakage prevention and stoppage tool for a loess layer and a using method of the leakage prevention and stoppage tool. The leakage prevention and stoppage tool at least comprises a pipe body and further comprises a rubber cylinder assembly and a sliding sleeve which are sequentially arranged on the pipe body in a sleeving mode from top to bottom; and an upper steel ringand a lower steel ring are arranged at the two ends of the rubber cylinder assembly correspondingly, the upper steel ring is fixed to the upper part of the pipe body, a shear pin is arranged between the lower steel ring and the lower part of the pipe body, when the lower pressure is greater than the bearing capacity of the shear pin, the shear pin is sheared off, the sliding sleeve moves upwards,and thus the sliding sleeve is extruded axially. During using, the leakage stoppage tool is connected with a guide pipe string entering a well to be lowered into a loess borehole, after the guide pipestring reaches the well bottom, the sliding sleeve makes contact with the well bottom, guide pipes downwards press the sliding sleeve through the self weight, the shear pin is sheared off, and the guide pipe string continues moving downwards to extrude a rubber cylinder; and the rubber cylinder is compressed in the axial direction and expanded in the radial direction to make contact with the wellwall so as to be sealed. According to the using method, an annulus between the guide pipe string and the borehole in the loess layer is reliably packed and blocked at the well bottom, so that duringsubsequent drilling, circulating drilling fluid does not make contact with the loess layer, and the leakage prevention and stoppage effects are achieved.

The invention discloses coalbed methane mining auxiliary equipment. According to the coalbed methane mining auxiliary equipment, a mode of centralizing local area extraction is adopted, and the extraction efficiency and reliability can be effectively improved without the excessive extraction power; a ring flange positioning assembly is used for positioning, auxiliary hollow rods can be swung at acertain amplitude with an angle adjustment assembly as a supporting point, in the way, the auxiliary hollow rods can conveniently extend into coalbed extraction drilling holes, and the layout efficiency of extraction pipes is improved; extraction rods extend into the auxiliary hollow rods to protect the extraction rods, and the risk that fractures are produced due to the fact that the extraction rods are placed in the drilling holes is prevented; the space between a first expansion sleeve assembly and a second expansion sleeve assembly can be conveniently adjusted to realize key extraction; and expansion of the first expansion sleeve assembly and the second expansion sleeve assembly is more reliable, a hydraulic mode is used for expansion, a porous inner expansion sleeve is arranged internally, expansion can be more uniform, the tightness is improved, and the service life is prolonged.

The invention relates to a small sample gas concentration prediction method based on improved GAN and LSTM. The method comprises the following steps: acquiring historical data of target gas concentration; preprocessing the historical data of the target gas concentration, and constructing to obtain a historical data set; a historical data set is expanded through the improved GAN, an expanded data set is obtained, and in order to avoid the gradient disappearance problem of the GAN in the training process, a Wasserstein distance is used for constructing a loss function to improve the GAN; dividing the expanded data set into a training set and a test set according to a set proportion; training the LSTM network by using the training set and the test set to obtain a gas concentration prediction model; and inputting gas data which actually needs to be predicted into the gas concentration prediction model, and outputting to obtain a corresponding predicted gas concentration. Compared with the prior art, the method has the advantages that negative effects caused by insufficient samples can be eliminated, the problem of small sample gas concentration prediction can be effectively solved, and the gas concentration prediction precision is improved.

The invention provides an automatic expanding connection device at an engine oil filling port. The automatic expanding connection device comprises a case. An expanding connection die is arranged on the case which is internally provided with a pneumatic power system. The expanding connection die is connected with the pneumatic power system through a lifting cylinder and composed of a flange plate fixing part and an engine oil filling port expanding connection part. The engine oil filling port expanding connection part is arranged in the center of the flange plate fixing part and composed of a plurality of expanding connection petals and an expanding connection shaft. An expanding connection protrusion is arranged outside each expanding connection petal. A circle is defined by the expanding connection petals in a surrounded mode. The expanding connection shaft is located in the center of the circle defined by the expanding connection petals in the surrounded mode and connected with the lifting cylinder. A foot switch is arranged outside the case. The pneumatic power system is controlled by the foot switch. According to the automatic expanding connection device at the engine oil filling port, premise requirements for the brazing process are met; the automatic expanding connection device is convenient and efficient to use and has multiple functions by means of electric control; and the automatic expanding connection device is suitable for automatic expanding connection for multiple types of products.