51 results about "Diaphragm rupture" patented technology

The invention discloses a simulation test system of coal-gas outburst during rock cross-cut coal uncovering, comprising a box provided with an opening at the top thereof, wherein the opening is equipped with a loading steel plate; a top plate and a bottom plate are paved in a closed cavity; a coal layer is paved between the top plate and the bottom plate; a slant angle is formed between the coal layer and the horizontal plane; an outburst simulation roadway is stretched in the bottom plate till being intersected with the coal layer; a notch attached to the coal layer is arranged at the intersection of the outburst simulation roadway; a diaphragm is arranged at the notch; an outburst opening and a gas balance opening are arranged at a part of outburst simulation roadway, which is exposed out of the box; the outburst opening is provided with a quick-opening seal structure; the gas balance opening is communicated with an air pressure tank; surface inflatable structures are respectively arranged on the contact surface of the coal layer and the top plate as well as the contact surface of the coal layer and the bottom plate; and the surface inflatable structures are communicated with a gas pressure tank. According to the invention, a mechanical release-diaphragm rupture method is adopted to ensure that the whole-process simulation of the coal-gas outburst during the rock cross-cut coal uncovering is realized.

A hydraulically driven pump includes a first chamber exposed to a process fluid, a second chamber configured to retain a hydraulic fluid, and a multi-layer diaphragm positioned between the first and second chambers. The diaphragm includes a first layer in contact with the process fluid being pumped, a second layer in contact with the hydraulic fluid, and a third layer that includes an elastomeric base material and an elastomeric conductive trace embedded in the elastomeric base material. The third layer is positioned between the first and second layers and being movable relative to the first and second layers. Changes in an electrical resistance of the conductive trace indicate a failure condition in one of the first, second and third layers.

The invention discloses a compound nanofiber diaphragm for a lithium ion power battery. The compound nanofiber diaphragm comprises an upper layer, an upper middle layer, a middle layer, a lower middle layer and a lower layer, wherein the upper, middle and lower layers are polyethylene terephthalate (PET) nanofiber layers; the upper and lower middle layers are polyethylene nanofiber layers; the lower middle layer is covered on the lower layer; the middle layer is covered on the lower middle layer; the upper middle layer is covered on the middle layer; and the upper layer is covered on the upper middle layer. Or the compound nanofiber diaphragm adopts a three-layer structure form. The invention also provides the compound nanofiber diaphragm for the lithium ion power battery and a manufacturing method thereof. By the compound nanofiber diaphragm for the lithium ion power battery and the manufacturing method thereof, heat resistance is improved, a difference value between diaphragm rupturing temperature and obturating temperature is increased, and security is enhanced.

The invention relates to a diaphragm positioning and clamping device. The diaphragm positioning and clamping device comprises slotted nuts, left-handed screws, right-hand screws, and adjusting rings; the external screw-thread of the left-hand screws matches the inner thread of the left-hand threaded hole of the slotted nuts and the external screw-thread forms a alveolar interleaving structure along the circumferential direction; through-holes with the same diameter as the shock tube of the wind tunnel are formed inside of the left-handed screw; the external screw-thread of the right-hand screw is matched with the inner thread of the slotted nuts and the right-hand threaded hole, and the external screw-thread forms an alternating structure of the teeth along the circumferential direction; the through holes of the right-hand screw are in the throat section of the wind tunnel nozzle; the compressed air is adjusted inside the ring through the long slot of the left screw rod, acting at the left end of the diaphragm; When the diaphragm ruptures, the compressed air enters the wind tunnel nozzle via a long slot of the right-hand screw; The diaphragm positioning and clamping device can insert the rod into the slotted nuts through a hydraulic push and a pull mechanism of the shock tube and the nozzle; by setting the swinging hydraulic cylinder to drive the slotted nut to rotate, the meshing, clamping and releasing can be realized, and the device is simple to operate and has high degree of automation.

The invention provides a battery diaphragm, a preparation method thereof and a battery comprising the battery diaphragm. The battery diaphragm comprises a ceramic layer, and a first polymer electrolyte layer and a second polymer electrolyte layer which are arranged on two sides of the ceramic layer, wherein the first polymer electrolyte layer and the second polymer electrolyte layer respectively and independently comprise components in percentage by weight, 10-87% of polymer, 2-30% of ceramic powder, 1-30% of lithium salt and 10-30% of plasticizer. The battery diaphragm is prepared by dispersing materials of the first polymer electrolyte layer and the second polymer electrolyte layer in solvent to prepare the slurry, and then forming a film with the ceramic layer in sequence. The battery diaphragm is advantaged in that the battery diaphragm has a relatively high liquid absorption rate, ionic conductivity and elongation at break, can effectively reduce the risk of diaphragm rupture, andimproves the rate capability and cycle performance of the battery.

The invention relates to a shock tunnel diaphragm rupture device and belongs to the hypersonic shock tunnel engineering field. The shock tunnel diaphragm rupture device includes a gun barrel connection structure, a cone supporting plate, a diaphragm rupture cone, a high-pressure cavity pipeline, a low-pressure cavity pipeline, a shock tube high-pressure section gun barrel, a shock tube low-pressure section gun barrel and a diaphragm; the left side of the gun barrel connection structure is fixedly connected with the shock tube high-pressure section gun barrel; the right side of the gun barrel connection structure is fixedly connected with the shock tube low-pressure section gun barrel; the cone supporting plate is fixedly installed in the gun barrel connection structure; the diaphragm rupture cone is axially and fixedly installed at the axis of the cone supporting plate through the gun barrel connection structure; the high-pressure cavity pipeline and the low-pressure cavity pipeline are arranged at the outer wall of the diaphragm rupture cone along the radial direction of the gun barrel connection structure; and the diaphragm is fixed between the gun barrel connection structure and the shock tube low-pressure section gun barrel. The diaphragm rupture of a shock tunnel can be both realized under high driving pressure or low driving pressure, diaphragm rupture time is significantly shortened, and the controllability of the diaphragm rupture process is high.

The invention discloses a vibrating diaphragm preparation method and a vibrating diaphragm. The preparation method comprises the steps: adding a mica material into liquid silica gel and evenly mixing;performing cross-linking formation on the mixed materials to obtain the vibrating diaphragm. The liquid silica gel is modified by the mica material, so that the damping capacity and the elasticity modulus can be obviously improved, partition vibration of the vibrating diaphragm can be obviously reduced, and noise can be absorbed; thus, audition performance of a sound production device is improved, F0 (resonant frequency) of the vibrating diaphragm is adjusted, nonlinear distortion of the vibrating diaphragm is reduced, and the phenomenon of vibrating diaphragm rupture is reduced.

The invention relates to a self-operated axial-flow pressure regulating valve that can be fully opened when a failure occurs, including a valve body with an inlet before pressure regulation and an outlet after pressure regulation, a valve core, a film, an opening spring, a position sensor, a preposition and a control command The device and the pressure-taking nozzle are characterized in that: the opening spring of the inner cavity of the valve is placed at the rear of the membrane diaphragm. Beneficial effects: the opening spring in the main valve body is arranged at the rear of the main diaphragm of the film, which can realize that when the main diaphragm of the pressure regulating valve is broken or damaged or the control pilot (pilot valve) is damaged and the load control pressure is lost, the pressure regulating valve valve The core uses the force of the opening spring to open the pressure regulating valve and maintain the fully open state, and at the same time the sensor sends out an alarm signal to remind the user of the function of timely maintenance.

The invention relates to the technical field of lithium battery diaphragms and in particular to a high-strength composite lithium battery diaphragm and a preparation method thereof. The high-strengthcomposite lithium battery diaphragm comprises components: by weight, 100 to 120 parts of base material, 20 to 30 parts of reinforcing agent, 5 to 10 parts of toughening agent, 10 to 20 parts of macromolecular pore-foaming agent, 2 to 5 parts of antioxidant, 10 to 15 parts of adjuvant, and 2 to 5 parts of lubricant. the lithium battery diaphragm of the invention is prepared by a film-blowing forming and macromolecular pore formation method, and has good high temperature resistance and a relatively high obturator temperature and diaphragm rupture temperature difference. When the working temperature rises during the use of the battery, the migration channel of electrolyte ions can be quickly closed to stop the passage of ions and thus ensure the safety of the battery.

The invention provides a diaphragm, a preparation method thereof, a secondary battery and electric equipment. The diaphragm comprises a base film, at least one inorganic coating and at least one organic coating, the base film, the inorganic coating and the organic coating are laminated, at least one side surface of the base film is in contact with the inorganic coating, the organic coating contains organic heat-resistant resin, and the lower one of the melting point and the decomposition temperature of the organic heat-resistant resin is greater than or equal to 200 DEG C. The diaphragm with the structure can improve the high-temperature shrinkage performance of the diaphragm while increasing the diaphragm rupture temperature of the diaphragm.

A pressure-measuring sensor having an electrically-conductive separating diaphragm closing off an interior chamber of the pressure-measuring sensor to the outside, to whose exterior surface a liquid medium under pressure can be applied, and having a device for detecting a diaphragm rupture of the separating diaphragm. At least one electrode is arranged on an interior surface of the separating diaphragm which faces the interior chamber, said electrode being electrically insulated from the separating diaphragm by an insulating layer arranged between the electrodes and the separating diaphragm and mechanically connected to the separating diaphragm, a measuring circuit is connected to a capacitor formed by the separating diaphragm and the electrode, said measuring circuit measuring and monitoring a measured variable dependent upon an electrical property of the capacitor, which is changed by a medium penetrating into the area of the capacitor when a diaphragm rupture of the separating diaphragm occurs.

The invention discloses a two-dimensional simulation method for a shock tube diaphragm rupture process based on overlapped dynamic grids. According to the two-dimensional simulation method for the shock tube diaphragm rupture process based on the overlapped dynamic grids, initial grids are established for a shock tube and a diaphragm respectively, the problem of grid hole breaking under the wall surface crossing condition is solved by setting special boundary conditions, the diaphragm deformation mode is defined as arc bending type deformation, and dynamic grid simulation is carried out on the rupture process of the diaphragm, so that dynamic CFD simulation of the movement process of the diaphragm can be realized. Compared with an existing main ideal diaphragm rupture analysis method, the two-dimensional simulation method for the shock tube diaphragm rupture process based on the overlapped dynamic grids better conforms to physical reality, the obtained simulation result is more accurate and feasible, and the effect of researching the flow problem of a shock tube and a shock tunnel is obvious.

The invention discloses a double-diaphragm rupture warning device of a metering pump. The double-diaphragm rupture warning device comprises a double-diaphragm sealing ring. The double-diaphragm sealing ring is fixed to a position between a pump head and a pump cylinder of the metering pump by the aid of bolts, mounting fixing positions for a pump-head-side diaphragm and a pump-cylinder-side diaphragm of the metering pump are arranged on the double-diaphragm sealing ring, the top of the double-diaphragm sealing ring is used as a pressure output channel and is connected with an adjustable pressure filter valve, an annular pressure sampling pipe clings to the inner side of the double-diaphragm sealing ring, crossed pressure sampling holes are uniformly formed in a pipe body of the annular pressure sampling pipe, the top of the annular pressure sampling pipe is connected onto the pressure output channel of the double-diaphragm sealing ring, the annular pressure sampling pipe is connected with the adjustable pressure filter valve, and various warning monitoring elements are connected to the top of the adjustable pressure filter valve. The double-diaphragm rupture warning device has the advantages that the problem that media or hydraulic oil are contaminated by fillers of an existing double-diaphragm rupture warning device with the fillers after diaphragms rupture can be solved; problems that mistaken warning signals are easily transmitted by an existing vacuumized double-diaphragm rupture warning device and staffs are misled by the mistaken warning signals can be solved.

The present invention concerns a diaphragm unit for a diaphragm pump comprising a diaphragm core having a receiving means for a thrust rod of a pump drive, and a multi-layer pump diaphragm connected to the diaphragm core, wherein the pump diaphragm has a fluid-impermeable working diaphragm layer which in operation of the diaphragm pump comes into contact with a fluid to be delivered by the diaphragm pump, and a fluid-impermeable safety diaphragm layer, a sealed volume for receiving a fluid passing through the working diaphragm layer, that is arranged between the working diaphragm layer and thesafety diaphragm layer, and a first clamping region with which the pump diaphragm can be received in a receiving means of the diaphragm pump, wherein the first clamping region forms a ring which annularly surrounds the diaphragm core. To provide a diaphragm unit for a diaphragm pump which in a simple fashion permits detection of a rupture of the working diaphragm layer, according to the inventionit is proposed that provided within the ring formed by the first clamping region is at least one element of a sensor for detecting a fluid which penetrates into the sealed volume of the pump diaphragm.

The invention discloses a lithium battery diaphragm rupture temperature measurement system and a use method. The system comprises a heating device, a puncture device, a diaphragm, a measurement deviceand a control and data acquisition and processing device. The heating device, the puncture device, the measuring device and the control and data acquisition and processing device are connected with one another through electric signals. The relation of the diaphragm puncture strength changing along with the temperature can be measured through monitoring of the dynamic temperature, the diaphragm rupture temperature of the diaphragm can be accurately reflected through the change of the puncture strength, and the diaphragm rupture temperature measurement accuracy is improved.

The invention provides a diaphragm rupture determination method and device of a diaphragm compressor, electronic equipment and a storage medium, and relates to the technical field of computers. The method comprises the following steps: starting an electromagnetic valve connected with a diaphragm to exhaust air in the diaphragm; in the working process of the diaphragm type compressor, pressure values of all moments in a pressure guide pipe connected with the diaphragm are obtained; determining a pressure value change trend of the diaphragm in a first time period according to the pressure values of all moments in the pressure guide pipe; and according to the change trend of the pressure value, whether the diaphragm is broken or not is determined. Therefore, before the diaphragm compressor works, the air in the diaphragm is discharged firstly, and then whether the diaphragm is broken or not is determined according to the change trend of the pressure value, so that the influence of the air in the diaphragm on the pressure value is avoided, and the accuracy of judging whether the diaphragm is broken or not is improved.

The present invention relates to an improvement of a diaphragm holder for diaphragm electrolysis. It is characterized in that the diaphragm frame is made of epoxy methacrylic vinyl ester resin or MFE-3 vinyl ester resin by integral molding. The diaphragm frame used for diaphragm electrolysis of the present invention is formed by a continuous production process and has good corrosion resistance and bidirectional strength, so that the integrally molded FRP diaphragm frame has a long service life, good production and operation effect, and no Due to the collapse and fracture of the diaphragm frame, the liquid level difference between the cathode and anode in the electrolytic cell cannot meet the stable control of process technical conditions and the impact on product quality.