428 results about "Pump pressure" patented technology

The application discloses a processing method of gel candies, and belongs to the technical field of gel candies. The method comprises a control unit with multiple independent pouring units, each pouring unit comprising a pouring head and a temperature control module, and the following steps are performed: S1: initial sensing and parameter setting; S2: a staged dynamic pouring step; S201: a starting stage, in which pouring is started at P0 and the F0, and lasts for a predetermined starting time Δt1; S202: a stable stage, in which after Δt1 ends, a control mode based on real-time viscosity feedback is switched to, the heating power is adjusted to maintain the real-time viscosity μ of the material in a target range [μ min , μ max ], and pouring is performed at a basic pump pressure F base . Through the staged dynamic control, the application realizes the precision and high efficiency of the gel candy pouring process.

The invention discloses a dredge pump power monitoring and controlling method during long-distance complex slurry conveying of a trailing suction dredger, which comprises the following steps of: firstly, monitoring parameters, mounting a slurry densimeter, a pressure transmitter and a flow meter at an outlet of a dredge pump pipeline, collecting the slurry density rho, the pump pressure P and the flow velocity v in real time, measuring the density by the slurry densimeter; the pressure transmitter obtains pressure data, and the flow meter monitors flow. Secondly, pipe blockage risk judgment and power adjustment are carried out, judgment is carried out through two modes, and in the first mode, flow length related pipeline loss judgment is calculated based on the real-time density rho and the flow velocity v in combination with the collection time interval; in the second mode, the total pipeline resistance is calculated through a fitting formula based on the density rho and the flow velocity v under the rated flow and compared with the pump pressure P for judgment. The power of the dredge pump is increased immediately when the pipe blocking risk is judged in any mode; collecting data every 30 minutes after the self-dredge pump is started for 30 minutes, and adjusting the constant A according to the relationship between the density and the viscosity when the accumulated flow length reaches a specific condition; the method can ensure smooth conveying of the slurry and improve the construction efficiency and the equipment safety.

The invention relates to the technical field of automatic control of drilling parameters, in particular to a coal bed gas underground drilling construction parameter optimization method and system.The method comprises the following steps that sound wave response signals are obtained, propagation characteristics are calculated, bit pressure data are aligned, abnormal fluctuation is recognized, pumping pressure information is extracted, and the change trend is analyzed; and comparing the consistency of the regulation and control points and organizing regulation and control actions to finally form a coal-bed gas well drilling parameter optimization control flow. According to the method, accurate calibration of an abnormal state is achieved by constructing a sound wave propagation delay sequence and synchronizing bit pressure response, key regulation and control fragments are recognized in combination with a pumping pressure change trend, a time sequence coupling relation between bit pressure and pumping pressure is established, regulation and control action combinations meeting response consistency are extracted, and sequential organization is conducted; a control instruction set with continuity and pertinence is formed, collaborative recognition and linkage regulation and control of multi-parameter change trends are achieved, and stability and response coordination in the construction process are improved.

The present application relates to a kind of fracturing perforation position selection method, belong to a kind of coalbed gas horizontal well development technical field, specifically relates to a kind of coal seam roof horizontal well fracturing perforation position selection method.The present application provides new method and train of thought for the optimal perforation position of coal seam roof horizontal well, can reduce the problem of pump pressure being too high, sanding difficulty in reservoir reconstruction process, improve the reconstruction efficiency of coal seam.

The invention relates to the technical field of a multi-field coupling simulation shield pump pressure-bearing component service life prediction method, particularly discloses a multi-field coupling simulation shield pump pressure-bearing component service life prediction method, and aims to solve the problem of service life prediction distortion caused by difficult accurate modeling of a nonlinear coupling effect in traditional single field domain analysis. The method comprises the following steps: constructing a three-dimensional self-adaptive grid model covering a pressure-bearing shell, a flange and a bearing seat; defining multi-physical field boundary conditions containing temperature gradient, pressure pulsation, electromagnetic excitation and time-varying creep parameters; and executing thermal electromagnetic full-coupling transient simulation to obtain a stress-strain evolution field. According to the method, through strong coupling modeling, time-varying constitutive embedding and data closed-loop correction, crack dynamic tracking and life rolling prediction under extreme working conditions are realized, and failure early warning perspectiveness and engineering decision reliability are remarkably improved.

The invention relates to a soft soil foundation CFG pile construction method, and belongs to the technical field of soft soil foundation treatment. In order to solve the technical problems that the quality of a pile body is difficult to control and the pile forming efficiency is low in the soft soil foundation construction, the method is characterized by comprising the following steps: firstly, flattening and compacting a site, measuring and lofting to mark a pile position, and building a ground pumping system comprising a concrete truck pump and a high-pressure pipeline; then the long spiral drilling machine is moved to the pile position, drilling is conducted according to the initial speed, the motor current is monitored to range from 150 A to 180 A, and after it is judged that the long spiral drilling machine enters the hard soil layer, the speed is adjusted to range from 0.4 m / min to 0.9 m / min, and drilling is conducted to the designed pile depth; then the CFG mixture is pumped and poured, when it is monitored that the pumping pressure reaches 0.5-0.9 MPa, the drill rod is lifted at the initial speed, and the pumping displacement and the lifting speed are adjusted in real time according to the pressure of an outlet in the bottom of the drill rod; and finally, pouring to the pile top elevation, covering with wet linen, and watering for maintenance. The method is mainly used for CFG pile construction of the soft soil foundation, and the pile forming quality and efficiency can be improved.

The invention discloses a true triaxial hydraulic fracturing multi-scale monitoring system fusing acoustic emission, ultrasonic wave and strain linkage, and relates to the technical field of true triaxial hydraulic fracturing, which comprises a device main body, a horizontal stress loading system, a hydraulic servo pump pressure module, an acoustic emission monitoring system, a crack strain monitoring system and an ultrasonic monitoring system, according to the true triaxial hydrofracture multi-scale monitoring system integrating acoustic emission, ultrasonic wave and strain linkage, the hydrofracture process is comprehensively monitored through the acoustic emission monitoring module, the ultrasonic wave monitoring module and the strain gauge array monitoring module in an experiment, and the three monitoring means are matched with one another; and a data support with high temporal-spatial resolution is provided for the whole crack evolution process.

The invention discloses an air supply method and an air supply system for a pulsating type ventricular assist device. The air supply method comprises the following steps: setting working parameters of the pulsatile ventricular assist device; the stroke range of the piston in the air pump is determined according to the working parameters; obtaining a piston position piecewise function based on the stroke range; the piston is driven to be at the working zero point, the air pump communicates with the pre-inflation equipment through the pre-inflation pipeline, the air pump is inflated through the pre-inflation equipment, and air pump pressure initialization is completed; and the pre-inflation equipment is disconnected, the air pump is communicated with the pneumatic execution part through the air supply pipeline, a piston in the air pump reciprocates according to the determined piston position piecewise function, the pressure in the air pump is periodically changed, and the pneumatic execution part is periodically and intermittently driven to work according to the sequence of inflation, high-pressure keeping, deflation and low-pressure keeping. The problem of air supply of a balloon, an extracorporeal membrane cavity and the like of an existing pulsatile ventricular assist device is solved.

The invention provides a well bottom ECD accurate determination method based on a field multi-point cycle test, and belongs to the technical field of petroleum and natural gas drilling engineering. Comprising the following steps: selecting at least three different-depth test points on a casing section, and synchronously obtaining pump pressure, drilling fluid rheological parameters and borehole-drill rod geometric data; preprocessing the data; calculating annulus pressure loss, drill rod pressure loss and drill bit pressure loss of each test point based on an API standard formula; establishing a pumping pressure-pressure consumption associated linear equation set and solving annulus and drill rod pressure consumption correction coefficients; and outputting a shaft bottom ECD for eliminating naked eye interference in combination with the real-time drilling parameters and the inversion coefficient. According to the method, the multi-point cycle test and the dynamic inversion model are combined, the deviation between the theoretical model and the actual working condition is quantified through the correction coefficient, the weighted least square and the matrix condition number pre-judgment technology are combined, the problem of ECD calculation misalignment of a traditional method is solved, and the pressure control precision and safety in a complex drilling scene are remarkably improved.

The invention relates to the technical field of automatic control, and discloses an automatic control method and system for bearing grease injection. The method comprises the steps that weight data in the grease injection process are collected, a weight change curve is obtained after filtering, and the flow pulsation amplitude is calculated; when flow pulsation is abnormal, pump cavity volume and pipeline impedance parameters are obtained, pump speed correction is calculated based on pressure feedback, the pump rotating speed is adjusted, and preliminary stable flow is obtained; the state of the servo system is monitored based on the initial stable flow, if the resonance peak value exceeds the limit, servo parameters are optimized, the pumping pressure is adjusted in combination with a temperature compensation mechanism, and a compensation pressure signal is obtained; the overshoot of the pressure signal is evaluated, if the overshoot exceeds the limit, the control parameters are adjusted, the pressure deviation is corrected, a final grease injection instruction is generated in combination with backpressure suppression, precise grease injection is executed, and the weight accumulation change is monitored to judge the completion state; and the deviation between the actual total grease injection amount and the target amount is calculated, the current parameter is recorded as the initial set value of next grease injection if the precision reaches the standard, and the control precision of the grease injection process is improved.

The invention discloses a heat exchange system applied to fused salt energy storage and heat supply and an operation method of the heat exchange system, and particularly relates to the field of fused salt energy storage and heat supply. S2, starting of a high-temperature loop is completed through starting of a thermal medium loop, starting of a circulating pump, flow adjustment and pressure correction of a buffer tank; s3, starting the molten salt loop and controlling the temperature, regulating the opening degree based on a formula to stabilize the flow of the high-temperature loop, synchronously controlling the total flow of the circulating pump, and judging that the loop is started when the flow, molten salt outlet temperature and pump pressure stable conditions are met; an intermediate medium of the heat exchange system is in a liquid state and is driven by the circulating pump, and operation reliability and economical efficiency are higher than those of a gaseous medium; the heat exchange system can be suitable for heat exchange with the temperature difference larger than 500 DEG C, and heat stress safety and medium safety of the heat exchanger can be guaranteed; the investment cost of the pump is reduced by reducing the design temperature of the circulating pump.

The invention discloses a drilling pump pressure prediction method based on an artificial neural network, and the method comprises the following steps: S1, data collection; s2, data preprocessing; s3, constructing a neural network model; s4, model training and optimization; and S5, model verification and deployment. According to the method, multi-channel data fusion and time synchronization optimization are innovatively adopted, so that the data quality and consistency are improved; in combination with a deep neural network and a self-adaptive optimization strategy, the precision and generalization ability of pump pressure prediction of the drilling pump are improved; and an online updating mechanism is introduced, so that the model can be dynamically optimized according to real-time data, the defects of low prediction precision, poor adaptability and difficulty in real-time updating of a traditional method are overcome, and an efficient and reliable prediction means is provided for intelligent drilling control.

1. Name of the product in this design: Bottle body of a pump-pressed bottle. 2. Purpose of this design: For storing liquid contents. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The invention provides a fire extinguishing system and a fire fighting truck thereof, and the fire extinguishing system comprises a rack, the main water pump, the pure water pipeline, the mixing pipeline, the water path pneumatic butterfly valve, the mixing path pneumatic butterfly valve, the water pump pressure gauge, the water path flowmeter, the mixing path flowmeter, the liquid mixer, the gas-liquid mixing module, the first component supply module, the expansion component supply module and the control module are mounted on the rack; the water outlet end of the main water pump is provided with a water pump pressure gauge, and then is connected with a pure water pipeline and a mixing pipeline in a forked manner; the starting ends of the pure water pipeline and the mixing pipeline are respectively provided with a water path pneumatic butterfly valve and a mixing path pneumatic butterfly valve; the first component supply module is connected with the water inlet end of the main water pump; and the at least one expansion component supply module converges and is connected to the front of the gas-liquid mixing module of the mixing pipeline. Two or more groups of fire extinguishing components can be mixed and foamed, and are integrated on the rack, so that independent movement is facilitated to support fire extinguishing.

The utility model relates to coffee machine auxiliary equipment technical field, specifically is a kind of coffee machine brewing device outlet structure, comprising: funnel-shaped outlet pipeline and its columnar output end, output end is connected with the communication sleeve of sealing ring belt, and is connected with waste water collection tank through telescopic hose, outlet pipeline side wall inserts food-grade cleaning agent tank, manually lifting type pump pressure mechanism is equipped in tank, and push cleaning fluid enters pipeline flushing through the opening and closing mouth of hinged sealing sheet control, waste liquid is introduced into collection tank in orientation. The device realizes efficient cleaning, waste water zero pollution, and convenient operation, applicable to various coffee machines.

The invention provides a drilling machine fault diagnosis, alarm and processing method and device.The method comprises the steps that operation data and logging data of a target drilling machine are obtained, and the operation data comprise at least one of motor torque, motor rotating speed, motor power and motor temperature; the logging data comprises at least one of bit pressure, rotating speed, pumping pressure, well depth and torque; performing timestamp alignment, data normalization, feature cleaning and missing compensation on the operation data and the logging data to construct a unified time sequence multi-modal feature set; and inputting the unified time sequence multi-modal feature set into a pre-trained large language model, performing anomaly diagnosis on the target drilling machine, and outputting an improvement suggestion. According to the scheme, the technical problem that existing drilling machine fault diagnosis is low in efficiency and accuracy is solved, and the technical effect of improving the accuracy, generalization and response speed of drilling machine fault diagnosis is achieved.

The invention discloses a hand sprayer with a labor-saving pressing mechanism, and relates to the technical field of manual spraying devices. A compression pump is in threaded connection with the interior of a liquid outlet hole formed in the right side of the top of a box body, a push rod is fixedly connected to one side of the compression pump, the water outlet end of the compression pump communicates with a spraying rod, a cover is in threaded connection with the interior of a liquid inlet hole formed in the left side of the top of the box body, and a labor-saving mechanism is arranged in a cavity formed in the bottom of the box body. And a stirring assembly is arranged at the top of the labor-saving mechanism. According to the invention, by arranging the compression pump, the labor-saving mechanism and the stirring assembly, the natural arm swinging action conforming to ergonomics is converted into pumping pressure power, so that labor-saving operation of spraying operation and automatic and uniform mixing of liquid medicine are realized.

The application provides a low-energy operation precision control system and method for a truck, which comprises a tipping bucket variable pump, an oil return filter, a heat dissipation variable pump, a pressure control valve, a tipping bucket multi-way valve, a tipping bucket control valve group, a tipping bucket rodless cavity pressure sensor, a tipping bucket oil cylinder, a tipping bucket rod cavity pressure sensor, a hydraulic oil radiator, a temperature control valve, a radiator group one, a radiator pump outlet pressure sensor, a radiator control valve, a radiator group two, a radiator pump safety valve and an oil tank. The application can realize linear proportional control, energy-saving proportional control and high-efficiency proportional control of tipping bucket action.

The invention discloses a full built-in fluid circulation system which is mainly composed of a pressure chamber, a one-way valve or a controllable built-in valve or a controllable pumping pressure device or a controllable propelling device, a backflow guide pipe and the like. A one-way valve or a controllable built-in valve or a controllable pumping pressure device or a controllable propelling device, a backflow guide pipe, a load and the like are all arranged in the pressure cabin. The backflow guide pipe is a long and thin flow pipe, and the inlet end located below the pressure cabin is usually connected with the one-way valve or not connected with the one-way valve. A one-way valve or a controllable built-in valve or a controllable pumping pressure device or a controllable propelling device or a similar device arranged in the pressure cabin can be independently connected with the backflow guide pipe and can also be combined to be connected with the backflow guide pipe; and the fluid enters the backflow guide pipe from the inlet of the backflow guide pipe to start a circulation process, returns into the pressure cabin from the outlet of the backflow guide pipe, and enters the backflow guide pipe again under pressure to finish circulation.

The utility model discloses an adjustable pressure reducing valve structure of an airplane wheel jack, which relates to the field of pressure reducing valves and comprises a hydraulic manifold block, a one-way valve is arranged at the bottom of the hydraulic manifold block and comprises a one-way hole arranged at the bottom of the hydraulic manifold block, and a one-way valve steel ball and a one-way valve seat are sequentially arranged in the one-way hole from top to bottom. An overflow valve is arranged on one side of the hydraulic integrated block and comprises an overflow hole formed in one side of the hydraulic integrated block, and an overflow valve steel ball, an overflow valve seat, an overflow valve spring and an overflow valve element are sequentially arranged in the overflow hole from inside to outside. Compared with an existing pressure reducing valve, the pressure reducing valve has the advantages that the space of the pressure reducing valve is effectively saved, good pressure reducing performance is guaranteed, the pressure difference between the pressure of a low-pressure hand pump and the pressure of a high-pressure hand pump is reliable, pressure reduction is achieved, and the pressure reducing valve is compact in structure, light in weight and small in size.

The utility model discloses an automatic switchable CNG (compressed natural gas) filling device which comprises a liquid feeding pump, a pressure injection pump, a carbon dioxide storage tank and a generator, and the generator supplies power to the liquid feeding pump, the pressure injection pump and an electric heater. And the liquid feeding pump, the pressure injection pump and the generator are vehicle-mounted pries. Due to the fact that the liquid feeding pump, the pressure injection pump and the generator are vehicle-mounted pries, only one pressure injection vehicle-mounted device is needed to meet the requirement of carbon dioxide huff and puff operation hardware, additional transportation and hoisting operation is not needed, convenience, high efficiency, safety and reliability are achieved, and the operation cost of carbon dioxide huff and puff is effectively reduced.

The invention relates to the technical field, in particular to a fractured formation drilling fluid control system which comprises a pressure difference extraction module, a flow velocity deviation extraction module, a fracture sudden change recognition module, a channel switching execution module and a pumping pressure adjustment execution module. According to the method, by analyzing the difference fluctuation amplitude of the pressure intensity time sequences between different depths of the shaft and combining the flow velocity change trend comparison, a combined recognition mechanism for abnormal seepage path change is established, the control instruction is triggered to push the state adjustment of the conveying channel, the response period from recognition to execution is shortened, the path control flexibility is improved, and the method is suitable for popularization and application. Further, after channel state switching is completed, pump pressure adjustment is executed according to the resistance characteristic of the current connection structure, and through dynamic adaptation of conveying frequency and pressure output, matching regulation and control of the fluid operation state are achieved, the adaptability of drilling fluid to the crack sudden change environment is enhanced, pressure disturbance caused by abnormal seepage is relieved, and the stability of the drilling fluid is improved. The shaft operation environment is kept stable.

The invention discloses a device and a method for preparing diacetate fiber tows with adjustable total denier. The device comprises a dissolving kettle, a filtering system, a gear pump, a pressure sensor, a spinneret cap assembly, a channel, a wire feeding roller and a motor. Wherein the spinneret cap assembly is provided with an adjustable opening adjuster, and the number of the fan-shaped adjusting units is increased or decreased to control the effective opening number of the spinneret orifices, so that the total denier number of tows is continuously adjusted. And in cooperation with rotation speed adjustment of the gear pump, the production requirements of tows of different specifications can be met, and efficient and flexible preparation of the tows with multiple total deniers is achieved. The method comprises the steps of dissolving, filtering, spinning and total denier adjusting, and accurate control over the total denier number is achieved by synchronously adjusting the number of the fan-shaped adjusting units and the rotating speed of the gear pump. The device is compact in structure, convenient to adjust, good in sealing performance and suitable for large-scale production of the diacetate fiber tows.

1. The name of the design product: water pump pressure controller. 2. The use of the design product: for controlling water pump water pressure. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

The invention provides a pump pressure and hanging load dynamic threshold early warning method and an intelligent monitoring device, and relates to the technical field of industrial automation monitoring, and the device comprises a host, a 7-inch color touch display screen, a pump pressure sensor, a hanging load sensor, a pump pressure transmitter, a hanging load transmitter, an audible and visual alarm, a relay set, a PLC and a DC24V external power supply. All the components are connected through special cables (a pumping pressure signal cable, an alarm cable and the like). According to the device, the early warning standard can be flexibly adjusted according to the actual operation rhythm through the adjustable early warning detection time (supporting setting of different operation durations) in combination with the dynamic judgment logic of the average pumping pressure value in the set time period and the value lower than the average parameter, and during short-time operation, the detection time can be shortened, and false alarm can be avoided; during long-time continuous operation, the detection time can be prolonged, long-term low-voltage risks can be captured, the requirements of on-site diversified operation are really met, invalid shutdown and risk omission are reduced, and it is guaranteed that the operation process is coherent and efficient.

The utility model relates to the technical field of waste plastic recycling, in particular to a waste plastic recycling device which comprises a pulverizer, a spiral conveyor is arranged at a discharge port of the pulverizer, a melting machine is arranged at a discharge port of the spiral conveyor, a pressure pump is arranged at an outlet of the melting machine, and an outlet of the pressure pump is connected with a profiling die. A cooling box is arranged at the discharging position of the profiling die, an automatic cutting device is arranged at a discharging port of the cooling box and comprises a cutting knife installed at the discharging port and an electric push rod controlling the cutting knife to act, and a discharging table is arranged below the cutting knife. According to the utility model, waste plastics with different sizes are crushed into particles through the crusher, and then the particles are heated by the melting machine, so that the plastics are molded again, and people can recycle the molded plastics conveniently.

This invention discloses a mud pump pressure reduction device for engineering exploration drilling rigs, including a drilling mechanism. The bottom of the drilling mechanism is provided with several drill rods connected by a connecting mechanism. The bottom of each drill rod is provided with a drill bit fixedly connected thereto. The outer periphery of the drill bit is provided with a first annular tube detachably connected thereto. The surface of the drill bit is provided with several first channels extending to the top of the drill rod. The top of each first channel is provided with a mud pump connected thereto. The device also includes a fixing mechanism for fixing the device to the ground. This device ensures that the pressure inside the borehole always adapts to and balances the side pressure on the borehole wall generated by the continuous increase in drilling depth, maintaining the integrity of the borehole wall and preventing collapse. It can also completely fit against uneven borehole walls, seamlessly connecting the fixing work of the borehole during drilling, while preventing the pump cover from breaking and flying out and injuring people due to excessive pump pressure.

The utility model provides a ceramic pressure grouting machine, and relates to the technical field of ceramic pressure grouting. The ceramic pressure grouting machine comprises a base, a slurry barrel, a female mold and a supporting frame are fixedly installed at the top of the base, the ceramic pressure grouting machine further comprises a hydraulic cylinder, the hydraulic cylinder is fixedly installed at the top of the supporting frame, an output shaft of the hydraulic cylinder penetrates through the top of the supporting frame and is fixedly provided with a male mold, and the male mold is located over the female mold; the pressure pump is fixedly mounted at the top of the slurry barrel, a rotating roller is rotatably mounted in the slurry barrel, and a plurality of stirring blades are fixedly mounted on the peripheral side of the rotating roller, so that gravel particles attached to the filter screen and raw material cakes which are not fully ground can be scraped; gravel particles in the ceramic slurry and raw materials which are not fully ground are prevented from blocking the filter screen, it is guaranteed that the ceramic slurry can smoothly pass through the filter screen, and the conveying efficiency of the ceramic slurry is greatly improved.

The high-viscosity melt material filter comprises a first pipeline and a second pipeline which are vertically arranged, the filter screen used for filtering high-viscosity melt materials is arranged in an installation pipe, a fixing rod is fixedly connected to an installation plate, a rotating support is movably installed on the fixing rod, and the first pipeline and the second pipeline are fixedly connected to the installation plate. A short connecting pipe is fixedly installed on the rotating support, the short connecting pipe is arranged between the first heat preservation ball valve and the installation pipe, a quick disassembling mechanism is arranged on the short connecting pipe, and the short connecting pipe is fixedly installed on the first heat preservation ball valve and the installation pipe through the quick disassembling mechanism. In order to reduce resistance, melt materials are discharged in a vertical discharging mode, gravity can be utilized in vertical discharging, pumping pressure is reduced, energy consumption is reduced, retention and blockage can be reduced, flowing efficiency is improved, the retention and blockage rate of the materials is reduced, maintenance frequency and cost are reduced, and the service life of equipment is prolonged.

The application relates to a gas control vacuum proportional valve, belonging to the field of gas pump pressure regulation, and mainly applied to vacuum pumping after electrolyte is filled into a battery pack of a lithium battery. The gas control vacuum proportional valve comprises a valve head, a valve body and a valve core. The valve head and the valve body enclose a positive pressure cavity connected with a positive pressure gas source. The valve core is provided with an output air channel connected with a vacuum pump and an input air channel connected with a lithium battery device to be vacuumized. The input air channel and the output air channel are selectively connected into a vacuum flow channel through an air port. The valve core is further provided with a containing cavity and a gas control pressure regulating assembly arranged in the containing cavity. The gas control pressure regulating assembly comprises a rubber-coated valve port diaphragm separating the vacuum flow channel and the containing cavity. The valve core is provided with a gas stopping baffle. The gas pressure in the positive pressure cavity can drive the rubber-coated valve port diaphragm and cooperate with the gas stopping baffle to form the air port. The containing cavity is always in a sealed state, so that the problem that corrosive electrolyte is inhaled into the containing cavity along with the gas when the gas control vacuum proportional valve is used to pump vacuum after electrolyte is filled into the battery pack is solved.