19results about How to "Avoid high pressure" patented technology

The utility model discloses an optimized water supply system, relates to the technical field of water supply optimization, and aims to solve the problem that the output pressure of an existing common pressure reducing valve does not change along with the output flow. An optimized water supply system comprises a main valve of a pressure reducing valve and a pilot valve, a pressure sensor and a flow sensor are arranged on an output pipeline of the main valve of the pressure reducing valve, a remote pressure sensor is further arranged on the most disadvantageous water distribution point, and a flow adjusting valve is arranged on an input pipeline of the main valve of the pressure reducing valve. The pressure sensor and the flow sensor are electrically connected with the controller; the pilot valve comprises a servo motor; and the controller is electrically connected with the servo motor. According to the optimized water supply system, the output pressure of a common pressure reducing valve can be changed along with the output flow, the output pressure is low when the flow is small, the situation that a pipeline system bears high pressure all the time regardless of the flow is avoided, and therefore the water leakage rate and the pipe explosion rate are reduced.

The utility model relates to the technical field of smoke bullet, and disclose a smoke bullet, smoke bullet silica gel child lock and smoke bullet oil injection exhaust device, including bottom cover, the bottom cover is fixedly connected with oil absorption cotton in, the bottom cover inlays has the oil storehouse sealing silica gel, the oil absorption cotton is located between bottom cover and oil storehouse sealing silica gel, through the child lock silica gel and the exhaust groove design, compared with the cross groove gap natural exhaust mode, the exhaust groove specially designed provides independent and unobstructed discharge path for the gas in the smoke bullet, in the oil injection process, the tobacco tar enters the tobacco tar storehouse under the action of oil injection pressure, the internal gas can be through the exhaust groove fast, directional discharge, avoid the gas accumulation in the storehouse and form high pressure, the above structured exhaust design can accurately match the oil injection rate, ensure that the gas discharge and tobacco tar injection are synchronous, eliminate the tobacco tar extrusion into the atomizing core problem caused by the poor exhaust from the root, make the oil injection process more stable, controllable.

A refrigeration apparatus and a method for bleeding thereof are provided. The refrigeration apparatus comprises a compressor comprising a compressor inlet and a compressor outlet; a condenser downstream of the compressor outlet; a first valve downstream of the condenser; and at least one flow path downstream of the first valve, each of the at least one flow path comprising a flow regulating valve to control the flow of refrigerant into the at least one flow path; wherein the first valve and the flow regulating valve are normally closed valves, and wherein the refrigeration system further comprises a bleed flow path connected between the first valve and the flow regulating valve, thereby allowing fluid to escape between the first valve and the flow regulating valve when the first valve and the flow regulating valve are closed. Embodiments according to the present invention effectively bleed fluid in a closed circuit, preventing the creation of high pressure.

The utility model relates to a kind of double-layer heating's ironing bottom plate, including bottom plate and the baffle being located on bottom plate, bottom plate is equipped with steam generation chamber, bottom plate and baffle are equipped with cabin wall and form the steam generation chamber, the steam generation chamber is separated into upper layer cabin and lower layer cabin by baffle, the upper layer cabin includes upper layer inner labyrinth in middle part and upper layer outer labyrinth in periphery;The lower layer cabin includes lower layer inner labyrinth in middle part and lower layer outer labyrinth;The terminal point of lower layer inner labyrinth is connected with exhaust chamber, steam injection hole is arranged in the position of bottom plate of the bottom surface of exhaust chamber;Baffle also includes electric heating unit for supplying heat to steam generation chamber.This embodiment has the beneficial effect that double-layer vaporization design enables steam generation chamber to produce steam more efficiently, reducing the time from normal temperature to produce high-temperature steam, thereby shortening the preheating time of electric iron, and users can start ironing work faster.

The refrigerating system comprises a compressor, a condenser, an evaporator, a buffer part and a controller, the buffer part is connected to the input end and the output end of the compressor through a first bypass pipeline and a second bypass pipeline, a first bypass valve is arranged on the first bypass pipeline, and a second bypass valve is arranged on the second bypass pipeline; the controller is used for acquiring related parameters of the compressor; related parameters are converted into a fuzzy set through a membership function, and reasoning calculation is conducted on the fuzzy set; performing defuzzification operation on the reasoning calculation result; controlling the opening degree of the first bypass valve and the opening degree of the second bypass valve according to the defuzzification operation result; the operation efficiency and stability of a refrigerating system of the air conditioning unit under different working conditions are improved, and high-voltage and low-voltage faults are avoided.

The bidirectional gear pump comprises a front shell, a rear shell, a first shaft hole, a second shaft hole, a third shaft hole, a fourth shaft hole, a first gear shaft and a second gear shaft, wherein the first shaft hole, the second shaft hole, the third shaft hole and the fourth shaft hole are vertically and symmetrically formed in the horizontal center line of the front shell and the rear shell; a first groove and a second groove are formed around the first shaft hole and the second shaft hole, the first gear and the second gear are installed in the grooves, and the first gear and the second gear are connected in a meshed mode; oil drainage grooves are formed in the outer end surfaces; the thicknesses of the first gear and the second gear are consistent with the depths of the first groove and the second groove of the front shell; an oil inlet and an oil outlet are formed in the outer end face of the rear shell and located in the two sides of the vertical center line of the rear shell. No gap exists between the inner end face of the front shell and the inner end face of the rear shell.

Pendulum power transmission drive wheel with mechanical recovery of part of the braking energy, developed from a reducer (3) attached to the vehicle suspension. The drive wheel (1) is fixed to the slow shaft (4) of the reducer (3). On the fast shaft (5) on its stub axle, a bearing (7) is fixed from which a swing arm (6) hangs, at the end of which the engine (8) is fixed, which drives the fast shaft (5) by means of a belt transmission (11), chain or gears, forming a pendulum assembly (19). On the arm (6) brake calipers (14) are mounted which, when activated on the disc (13), keep the pendulum assembly (19) raised, by the effect of the engine brake (8), accumulating potential energy. To move the vehicle, the calipers (14) are deactivated and the engine (8) is started simultaneously, recovering part of the braking energy on its descent and facilitating the starting of the engine (8) and the vehicle.

The present application provides an ultrasonic fingerprint recognition device and an electronic device. The ultrasonic fingerprint recognition device is arranged under the cover of the electronic device to realize ultrasonic fingerprint recognition, including an ultrasonic fingerprint recognition chip, a matching layer stacked on the ultrasonic fingerprint recognition chip, and a second electrode arranged relative to the matching layer. The ultrasonic fingerprint recognition chip includes a substrate, a first electrode, a pixel electrode array, and a piezoelectric layer. The first electrode receives a driving signal to drive the piezoelectric layer to excite an ultrasonic signal, and the second electrode receives a second driving signal to detect the self-capacitance between the second electrode and the finger to realize fingerprint recognition of the finger. Separating the shared touch sensing signal driving signal can avoid the existence of high voltage in the second electrode to reduce the voltage resistance design requirements of the chip circuit, and also improve the sensitivity of self-capacitance detection. Furthermore, it also adds more flexible and diverse application forms, which is convenient for flexible adjustment of the stacking in different application scenarios.

This invention discloses a dynamic constant pressure control device and method for hydrogen gas in a gas chromatograph, belonging to the field of gas analysis instrument control technology. It includes a chromatograph body, a ten-way valve, a multi-stage electromagnetic gas path control module, a pressure regulating chamber, a pressure regulating module group, and a pressure regulating control module. The pressure regulating chamber is connected to the hydrogen inlet through a first pressure regulating module, and is connected to the gas path pipelines of the multi-stage electromagnetic gas path control module through a second and third pressure regulating module, respectively. The pressure regulating control module controls the opening and closing of each pressure regulating module according to pressure changes at various points, achieving dynamic pressure balance. This invention buffers high pressure and supplements low pressure through the pressure regulating chamber, eliminating pressure surges in the closed pipeline when the ten-way valve switches, thus maintaining a stable hydrogen supply. This method achieves closed-loop control through initialization, pressure monitoring, predictive adjustment, and flow compensation steps. This invention solves the measurement deviation problem caused by hydrogen pressure fluctuations, improving the analytical accuracy and baseline stability of the chromatograph.

The invention discloses an active pressure release valve control method for air conditioner joint control, and relates to the technical field of vehicle engineering. If it is obtained that the vehicle is in the normal running mode, the vehicle door opening and closing state, the vehicle window opening and closing state, the air conditioner running state and in-vehicle environment information are detected; under the working conditions that a vehicle door is closed, a vehicle window is closed and an air conditioner is started, when the in-vehicle environment information parameter reaches a preset threshold value, the pressure release valve is controlled to be closed; when the in-vehicle environment parameters do not reach the preset threshold value, the pressure release valve is controlled to be opened or intermittently opened; if it is obtained that the vehicle is in the uphill and downhill mode, in-vehicle environment information is detected; when the in-vehicle environment information parameter reaches a preset threshold value, the pressure release valve is controlled to be in a closed state, when the in-vehicle environment information parameter exceeds the preset threshold value, the pressure release valve is controlled to release pressure in a small-opening, multi-frequency and staged mode, and when the in-vehicle environment information is abnormal, the opening degree of the pressure release valve is controlled, air conditioner external circulation is started, and air pressure inside and outside the vehicle is balanced.

A pressure protection device for hydraulic equipment relates to the field of hydraulic equipment, and comprises a pressure protection mechanism (4) connected in parallel to a hydraulic pipeline (1). The pressure protection mechanism (4) is used to protect the hydraulic oil in the hydraulic pipeline (1) from high pressure and unstable pressure. The pressure protection mechanism (4) comprises an oil inlet assembly (41), an oil outlet assembly (45), and a storage tank assembly (44) arranged between the oil inlet assembly (41) and the oil outlet assembly (45). The storage tank assembly (44) is used to stabilize the pressure of the hydraulic oil. The storage tank assembly (44) comprises a storage tank (441) that can undergo pressure deformation. The pressure protection device for hydraulic equipment of the present invention is connected in parallel to the hydraulic pipeline via the storage tank assembly that can undergo pressure deformation. When the pressure inside the hydraulic pipeline changes, the hydraulic oil in the storage tank assembly enters and exits the hydraulic pipeline, thereby preventing the hydraulic oil in the hydraulic pipeline from being high pressure or unstable pressure, reducing the load on the hydraulic equipment, and preventing leakage.

The present application discloses a circuit board damping mechanism and a vehicle-mounted apparatus using same. The mechanism is used for fixing a circuit board having through hole(s) to a base plate, and the damping mechanism includes: an assembly plate fixedly arranged on the base plate; each fixing bolt including a nut and a stud, wherein the stud passes through the through hole(s) and cooperate with the nut to fix the circuit board to the assembly plate; and a damping gasket arranged between the circuit board and the nut of the fixing bolt. In the present application, a bearing ring portion of a damping rubber ring bears most weight of the circuit board; and when the apparatus shakes longitudinally, the bearing ring portion and the upper damping gasket form a vertical buffer structure; moreover, the elasticity of the rubber ring itself is utilized to tightly press against the circuit board under the action of the fixing bolt(s), thereby buffering a longitudinal impact on the circuit board while preventing the circuit board from shaking longitudinally.

The invention relates to the field of wastewater purification, in particular to oil-liquid separation and purification equipment for oil-containing industrial wastewater treatment, which comprises a collection unit arranged in a sewage pool and used for collecting oil liquid, the oil liquid is gathered at the bottom of the collection unit, and a suction unit communicated with the bottom of the collection unit is arranged below the sewage pool. The suction unit comprises a suction shell fixedly arranged on the lower portion of the sewage pool, the suction shell is of a circular shell structure, the axis of the suction shell is parallel to the horizontal plane, a feeding port and a discharging port are formed in the upper portion and the lower portion of the suction shell in the vertical direction respectively, and a rotating ring is rotationally arranged in the suction shell around the axis of the suction shell. The axis of the rotating ring and the axis of the suction shell are collinear, a suction groove is formed in the circumferential wall of the rotating ring in the radial direction of the rotating ring, and a sliding block is arranged in the suction groove in the extending direction of the suction groove in a sliding mode. According to the invention, the oil liquid is prevented from blocking the suction unit for sucking the oil liquid, and the separated oil liquid can be smoothly discharged.

The utility model discloses an adjustable emergency pressure relief manhole which comprises a main body mechanism and an adjusting mechanism. The main body mechanism comprises a pipe body, an exhaust pipe installed on one side of the pipe body and communicated with an inner cavity of the pipe body, a baffle fixed to the inner wall of the pipe body, a round pipe fixed to the inner top wall of the pipe body, and an annular plate fixedly connected to the outer side of the round pipe in a sleeving mode and fixed to the inner wall of the pipe body. One end of the sealing piece is embedded in an inner cavity of the round pipe, the other end of the sealing piece is attached to the baffle, one end of the movable rod is embedded in the inner cavity of the round pipe, the other end of the movable rod extends out of the pipe body, the pipe body is used for installing other assemblies, and the bottom end of the pipe body is fixed to the tank body through bolts and communicated with the inner cavity of the tank body, so that air in the inner cavity of the tank body is conveniently exhausted outwards; an air hole is formed in the middle of the baffle, air can pass through the air hole conveniently, the top end of the round pipe is fixed to the inner top wall of the pipe body, and the adjustable emergency pressure relief manhole has the advantages of being adjustable in gas discharge pressure and high in practicability.

The invention discloses a stainless steel on-line solid solution acid-free descaling method capable of reducing work hardening, a solid solution process is to carry out on-line solid solution by using waste heat on the surface of a steel coil, an acid-free descaling process is carried out after the solid solution process, and the specific process comprises the following steps: (1) carrying out S roller treatment and scale breaking treatment on a stainless steel strip after the solid solution process, applying tension to two sides of the steel belt through S rollers at two ends; water spraying treatment is performed during scale breaking; (2) the stainless steel strip subjected to scale breaking treatment is subjected to surface scale removal through EPS treatment; (3) the stainless steel strip subjected to EPS treatment is brushed through a roller brush; (4) carrying out rinsing treatment on the stainless steel strip subjected to scrubbing treatment; and (5) the rinsed stainless steel strip is dried and then enters a coiling machine to be coiled into a finished steel coil.

The application relates to a motor double-layer cooling water channel shell based on additive manufacturing and an immersed cooling system, and belongs to the technical field of motor structures and thermal management. The shell comprises, from outside to inside, an inlet and outlet water jacket, a shunt outer water jacket and a shunt inner water jacket which are coaxially arranged in sequence; the inlet and outlet water jacket comprises two annular cavities as liquid inlet channels and liquid outlet channels; a shunt plate is coaxially arranged at the middle part of the shunt outer water jacket, and the shunt plate divides the inner cavity of the shunt outer water jacket into a shunt liquid inlet channel and a shunt liquid outlet channel; the shunt liquid inlet channel is uniformly provided with a layer of drainage holes which are in communication with the liquid inlet channels in the circumferential direction; the shunt liquid outlet channel is provided with another layer of drainage holes which are in communication with the liquid outlet channels in the circumferential direction; the shunt inner water jacket is provided with a plurality of distribution holes in the circumferential direction, and the circumferentially adjacent distribution holes are respectively in communication with the shunt liquid inlet channel and the shunt liquid outlet channel. The application realizes a spatial cross-flow channel network of "axial double-layer + radial layered", realizes precise cooling, and greatly improves the utilization rate of the cooling medium.

The utility model discloses a liquid cooling host computer and magnetic stimulation therapeutic instrument of magnetic stimulation therapeutic instrument, and liquid cooling host computer includes: host computer casing, water tank sets up in the inside of host computer casing, liquid sight glass is connected on host computer casing, and liquid sight glass is equipped with vent and air release, and vent is located the top of liquid sight glass and communicates with outside atmosphere, and the first communication pipeline is communicated between air release and water tank, adds and drains the pipeline, and the pipe orifice of one end communicates with water tank, and the other end adds and drains the pipe orifice and is located the outside of host computer casing, and adds and drains the pipeline and can supply the water of outside to enter water tank. Through additional setting and water tank communication adds and drains the pipeline, through adding and draining the pipeline to add water to water tank, and the air release of upper portion of liquid sight glass is not blocked in the process of adding water, and the water adding speed of water tank is faster, and on the basis that can utilize liquid sight glass to observe whether water level height in water tank adds to the set height, improves the water adding speed of water tank.

The utility model discloses a thermos kettle pressure relief structure which comprises a thermos kettle body, the upper end face of the thermos kettle body is in threaded connection with a kettle cover, an air leakage box is fixedly connected in the kettle cover, an air leakage hole is formed in the lower end face of the air leakage box, and a first spring is fixedly connected in the air leakage box. By arranging the air leakage box and the ventilation box, when the heat preservation kettle is used, after hot water is poured into the heat preservation kettle body, internal high pressure can be released through an air leakage hole of the pressure release box and discharged through a first ventilation hole, so that a stable air pressure structure is formed in the kettle; however, after hot water in the thermos kettle body is slowly cooled under the influence of various factors, negative pressure is formed in the thermos kettle body, then air is sucked in through a second air hole piece in the ventilation box, a stable air pressure structure is formed in the thermos kettle again, and the situation that the thermos kettle body is difficult to open due to the high pressure or negative pressure in the thermos kettle body is prevented. The use feeling is influenced.

The utility model discloses a kind of flange temporary connecting devices, belong to pipeline maintenance field.Its technical scheme is, a kind of flange temporary connecting device, including flexible connecting piece, the first end of flexible connecting piece is equipped with tightening mechanism, and the second end of flexible connecting piece is detachably installed on the tightening mechanism;Multiple clamping plates are installed on the flexible connecting piece, clamping plate can be moved along the length direction of the flexible connecting piece, and the side edge of clamping plate is equipped with wedge slot, when the both ends of the flexible connecting piece are connected, the wedge slot is all towards the ring inside the annular ring formed by the flexible connecting piece.This scheme, multiple clamping plates are arranged around flange plate, two flange plates are clamped into wedge slot, with the gradually tightening contraction diameter of the annular ring formed by flexible connecting piece, wedge slot makes two flange plates gradually press tightly each other, realize the temporary fixing of flange plate, without repeatedly installing bolt in this process, greatly simplify the dismounting process of blind plate when pipeline maintenance, improve maintenance efficiency.