8results about How to "Replaceable" patented technology

The utility model relates to a fuel cell stacking tool. The device comprises a stacking bottom plate, a positioning assembly, an air tightness test plate, an adjusting knob, an adjusting platform and a crossbeam; the positioning assembly is composed of a positioning embracing column and a positioning rod; the stacking bottom plate is provided with the positioning embracing column, the positioning embracing column is connected with the positioning rod, and the positioning rod is connected with the crossbeam; the air tightness test plate is fixed on the stacking bottom plate through the positioning embracing column; one side of the positioning embracing column is provided with the adjusting platform, the adjusting platform is provided with the adjusting knob for adjusting the backward or forward movement of the positioning embracing column; the positioning embracing column and the stacking bottom plate are provided with the adjusting knob for adjusting the inclination direction of the positioning embracing column. In the utility model, each component is modularly designed, convenient to disassemble and assemble, and can be compatible with the size change of the small range of the electric pile and the stacking requirement of different numbers of sheets, thereby achieving the effect of saving time and labor in the research and development stage.

The invention discloses a preparation method of a hydrogel electrode for freeze-induced ion directional diffusion and an electrode system, and belongs to the field of electrochemistry, and the preparation method comprises the following steps: constructing a hydrogel layer on the surface of an electrode catalyst layer, forming a water blocking region, and preventing free water from flowing and leaking on the premise of ensuring ion transportation required by electrochemical reaction. The gas-liquid-solid three-phase reaction gas diffusion electrode solves the problem of liquid leakage after long-time use of the gas-liquid-solid three-phase reaction gas diffusion electrode, realizes directional transportation of ions, improves the gas transportation efficiency of the electrode, and is especially suitable for various electrochemical systems with gas-liquid-solid three-phase reaction.

The invention belongs to the field of nuclear power station electrical engineering, and particularly relates to a silicon controlled rectifier pulse test device for detecting a generator excitation system. The device comprises a voltage regulating module, an adjustable alternating-current voltage source, an oscillographic module, a voltmeter, a waveform acquisition anode wiring terminal, a waveform acquisition cathode wiring terminal, a direct-current voltage anode acquisition wiring terminal and a direct-current voltage cathode acquisition wiring terminal. The alternating current power supply is connected with the adjustable alternating current voltage source through the voltage regulating module and used for providing alternating current power for the device, the adjustable alternating current voltage source is used for being connected with an alternating current input busbar, and the voltage regulating module is used for regulating conversion voltage; the positive input end and the negative input end of the oscillographic module are connected with a waveform acquisition anode wiring terminal and a waveform acquisition cathode wiring terminal respectively, the waveform acquisition anode wiring terminal is used for being connected with an equipment direct current output anode, and the waveform acquisition cathode wiring terminal is used for being connected with an equipment direct current output cathode; the oscillographic module is used for detecting the pulse waveform of the direct-current output end; the positive input end and the negative input end of the voltmeter are respectively connected with a direct-current voltage positive electrode acquisition wiring terminal and a direct-current voltage negative electrode acquisition wiring terminal, the direct-current voltage positive electrode acquisition wiring terminal is used for accessing a direct-current output positive electrode of equipment, and the direct-current voltage negative electrode acquisition wiring terminal is used for accessing a direct-current output negative electrode of the equipment; the voltmeter is used for measuring direct-current output voltage of equipment. The device is simple in wiring, can visually read voltage and check waveform, effectively improves the test measurement precision, improves the working efficiency, and reduces human errors at the same time.

The application discloses a manned-unmanned aircraft cooperative operation formation collision avoidance control method, and belongs to the technical field of aircraft cooperative control; the method adopts a hierarchical architecture separating performance layer and safety layer: the performance layer generates nominal instructions for tracking operation slots by model predictive control; the safety layer filters threats in real time based on collision cones, and converts collision avoidance conditions into linear inequality constraints about unmanned aircraft acceleration by using control barrier functions. By setting hierarchical safety parameters for unmanned aircraft-manned aircraft interaction and unmanned aircraft-unmanned aircraft interaction, and imposing hard constraints on the former and soft constraints that can be relaxed on the latter in solving, the absolute safety priority of manned aircraft is ensured. The application realizes effective decoupling of high-performance formation tracking and real-time autonomous collision avoidance, improves the real-time performance and reliability of the system while ensuring safety, and is suitable for large-scale cooperative operation tasks.

The present application relates to a kind of ultra-low temperature disc valves, it has set valve seat sealing structure in valve body;Along the preset axis of valve body, set valve stem;One end of valve stem is fixed butterfly valve sealing structure;Butterfly valve sealing structure and valve seat sealing structure keep sealed when valve stem rotates to, the state of ultra-low temperature disc valve closing, it is convenient to replace the sealing structure between valve body and valve seat, solve the sealing performance requirement of the sealing structure between valve body and valve seat in the existing ultra-low temperature disc valve is higher and higher, simultaneously, require the sealing structure between valve body and valve seat to have replaceability, the sealing structure of original ultra-low temperature disc valve cannot dismount the sealing structure between valve body and valve seat, only the valve body and valve seat of integral replacement, so as to cause the waste of resources, cause the increase of cost technical problem.

The utility model discloses a toy model which comprises a body component and a connecting component, and the body component comprises a head component, a body component, a crotch component, an arm component and a leg component. The connecting part comprises a spherical connecting piece and a horizontal rotating connecting assembly; the body parts are connected through the connecting parts; wherein one end of the spherical connecting piece is a spherical part, the other end of the spherical connecting piece is a columnar part, and clamping teeth are arranged on the columnar part; the horizontal rotation connecting assembly comprises a first connecting piece and a second connecting piece. One end of the first connecting piece is a columnar part with clamping teeth, and the other end of the first connecting piece is in a hemispherical shape with a cylindrical protrusion. One end of the second connecting piece is a columnar part with clamping teeth, and the other end of the second connecting piece is in a hemispherical shape with a cylindrical groove; the groove is matched with the protrusion, and the first connecting piece and the second connecting piece are connected through the groove and the protrusion. According to the toy model provided by the utility model, the body parts of the toy model are divided into a plurality of parts, and the rotation of the joints can be realized, so that the interestingness of the toy model is enhanced.

The utility model relates to the technical field of high-temperature-resistant plant tents, and particularly discloses a mutually-spliced high-temperature-resistant plant tent which comprises a frame and tarpaulin with changeable layers, and the frame and the tarpaulin can be spliced mutually. The frame comprises a main frame, transverse frames and longitudinal frames, wherein the transverse frames and the longitudinal frames are arranged in the main frame and form a plurality of splicing areas used for being connected with the tarpaulin. The tarpaulin comprises an outer frame detachably connected with the splicing area, a plurality of replaceable tarpaulin layers arranged in the outer frame and a fixing assembly arranged on the outer frame and used for fixing the tarpaulin layers. The service life of the tarpaulin cannot reach the use expectation due to the fact that the temperature difference between day and night is large, and the cost is high due to the fact that the whole tarpaulin needs to be replaced finally.

The present invention provides an additional support with adjustable lateral position. Based on the additional support, a single-column pier bridge is reinforced. The bridge includes a beam body, a single-column pier and a cap. The reinforcement structure includes a perforated bottom plate, a horizontal perforated sliding plate, an L-shaped additional support, a steel diagonal brace, a slide groove structure, a baffle, a single rod and an anchor bolt. The single-column pier is surrounded by a perforated bottom plate, the perforated bottom plate is provided with a slide groove, a horizontal perforated sliding plate is installed in the slide groove, an L-shaped additional support is provided on the horizontal perforated sliding plate, and the L-shaped additional support is provided with a slide groove structure. A single rod is hingedly installed in each slide groove structure through a slider. The other ends of the four single rods located on one side of the L-shaped additional support converge and are connected to the perforated steel pipe. The single-column pier bridge reinforcement structure provided by the present invention provides effective additional support for the transverse outer edge of the beam body at the position of the single-column pier by arranging a steel diagonal brace and a baffle on the L-shaped additional support, significantly improving the lateral anti-rollover capacity of the existing single-column pier bridge, and the reinforcement effect is remarkable.