3465 results about "Relief valve" patented technology

An incubator can include a body, a bed supported by the body, and a canopy defining an interior chamber that includes the bed. The incubator can include any combination of various features configured to reduce sound energy inside the incubator. The incubator can include a passive radiator, a Helmholtz resonator, a meta material absorber, an active noise cancelation system, a vented door latch assembly, an acoustically permeable seal, a pressure relief valve, a lift mechanism that uses a belt drive, double paned canopy walls, a bin with insulating compliant elements, a manual pressure release valve, a pressure differential notification system, non-parallel or curved canopy walls, a mattress with reticulated foam, and / or an acoustic filter.

A pump system includes a housing defining a first internal volume and a second internal volume, a first piston positioned to separate the first internal volume into a first chamber and a second chamber, a second piston positioned to separate the second internal volume into a third chamber and a fourth chamber, a first inlet check valve configured to permit fluid flow into the first chamber, a second inlet check valve configured to permit fluid flow into the third chamber, a directional control valve (DCV) repositionable between (a) a first position where the DCV is configured to fluidly couple the second chamber to a high pressure fluid source and (b) a second position where the DCV is configured to fluidly couple the fourth chamber to the high pressure fluid source, and a relief valve configured to supply a fluid to the DCV through an orifice to move the DCV.

The invention discloses horizontal rotary fermentation equipment for food processing and a fermentation method, and relates to the technical field of food processing ferment.The horizontal rotary fermentation equipment comprises a tank body, a feeding hopper, a discharging pipe, a barometer, an exhaust pipe and a pressure relief valve, the circumferential outer wall of the tank body is fixedly connected with a fixing frame, and a supporting frame is arranged below the tank body; the fixing frame is fixedly connected with the supporting frame, and a first stirring assembly and a second stirring assembly which are used for fully fermenting materials are arranged in the tank body. According to the invention, through the arrangement of the first stirring assembly and the second stirring assembly, under the synergistic effect of the driving force provided by the power assembly and the stirring direction changed by the reversing assembly, efficient stirring of materials is realized, and good conditions are created for fermentation; the defoaming assembly is arranged, so that the problem that the fermentation quality is influenced by excessive bubbles during stirring of traditional horizontal fermentation equipment is effectively solved, and the stability and high efficiency of the food processing and fermentation process are guaranteed on the whole.

The invention relates to the technical field of transformers, in particular to an oil-immersed power transformer which comprises a hollow rod, a first round rod, a first piston, a first spring, a cylinder, a second round rod, a second piston, a limiting block and a ventilation assembly. A hollow rod is fixedly connected to the diaphragm; a first round rod is slidably connected to the hollow rod. A first piston is fixedly connected to the first round rod and makes contact with the lower end of the hollow rod. A cylinder is fixedly connected to the box body; through cooperation of the hollow rod, the first round rod, the first piston, the first spring, the cylinder, the second round rod, the second piston, the second spring and the limiting block, pressure relief operation can be automatically completed when pressure in the transformer body is increased abnormally, and therefore the transformer body can be protected; and the transformer oil sprayed out at a high speed can be intercepted and prevented from being sprayed to the outside to pollute the environment, the intercepted transformer oil is gathered on the upper side of the diaphragm, manual collection of the transformer oil can be facilitated, and waste is avoided.

The invention provides a liquid cooling CDU system with an intelligent pressure balance tank, and relates to the technical field of electronic equipment heat dissipation, and the system comprises a main circulation loop, the intelligent pressure balance tank, a liquid supplementing loop, a control system and a monitoring module. The intelligent pressure balance tank is provided with a liquid level sensor set, an exhaust valve installed on the non-top portion and a mechanical pressure release valve. The installation height of the exhaust valve is preset so that a buffer air layer can be reserved. The control system responds to signals of the liquid level sensor and controls opening and closing of the liquid supplementing loop and the exhaust valve. Through the design of a buffer air layer and a non-top valve group of the intelligent pressure balance tank, automatic liquid supplementing and graded pressure protection logic are combined, the problems of manual liquid supplementing lag, large pressure fluctuation, high safety risk and the like of a traditional liquid cooling CDU system are solved, and the liquid cooling CDU system is suitable for efficient heat dissipation of a data center and high-power electronic equipment.

The invention discloses a load simulation loading system based on an engineering mechanical power system and a control method thereof, and relates to the technical field of mechanical power system simulation. The load simulation loading system comprises an engineering machinery power system, a load loading system, a whole vehicle control unit and an upper computer platform. The engineering machinery power system comprises a first oil tank, a main pump, a pilot pump, a pilot control handle, a signal control valve and a multi-way valve. The load loading system comprises a three-position four-way reversing valve, a proportional overflow valve, a first proportional throttle valve, a second proportional throttle valve, an electromagnetic valve, a third proportional throttle valve and a variable pump, wherein the three-position four-way reversing valve, the proportional overflow valve and the first proportional throttle valve are connected to the multi-way valve, the second proportional throttle valve and the electromagnetic valve are connected to an outlet of the proportional overflow valve, and the third proportional throttle valve is connected between the second proportional throttle valve and the second oil tank. And the three-position four-way reversing valve is constructed to enable an inlet of the proportional overflow valve to be communicated with one of the oil port A and the oil port B of the multi-way valve in a switching manner, and an outlet of the proportional overflow valve to be communicated with the other one of the oil port A and the oil port B in a switching manner.

The invention relates to the technical field of pressure release valves, in particular to a fire-fighting pipeline linear adjusting pressure release valve and a method, the fire-fighting pipeline linear adjusting pressure release valve comprises a first valve body, and further comprises a third valve body, a second valve body, a third valve core assembly, a second valve core assembly and a third valve core assembly, the second valve body is fixedly connected to the top of the third valve body, and a second valve element assembly is connected to the interior of the second valve body; and the pressure regulating mechanism comprises a pressure assembly communicating with the water outlet end of the first valve body, and the top of the second valve body is connected with an elastic assembly. By arranging the pressure adjusting mechanism, a traditional single spring adjusting mode is broken through, the water pressure in the sealing cover and the mechanical pressure of the adjusting screw rod and the first spring are superposed to form a composite pressure relief threshold value, and a method for linearly and finely adjusting the pressure relief threshold value is added; incompressibility of a water medium is utilized, instantaneous pressure fluctuation is absorbed, fatigue failure of the spring under high-frequency impact is effectively avoided, and the device is suitable for starting and stopping of a fire pump or scenes where water hammers frequently occur.

The invention belongs to the technical field of transformers, and discloses an explosion-proof sealed oil-immersed transformer which comprises an oil-immersed transformer body, a mounting frame is fixedly mounted at the top of the oil-immersed transformer body, an oil conservator is fixedly mounted on the mounting frame, the bottom of the oil conservator communicates with an explosion-proof oil pipe, and the explosion-proof oil pipe communicates with an oil storage tank. The explosion-proof oil pipe penetrates through and extends into the oil-immersed transformer main body, an oil pump is arranged on the explosion-proof oil pipe, an automatic pressure relief mechanism is arranged on the oil-immersed transformer main body, and the automatic pressure relief mechanism comprises a pressure relief valve cylinder. According to the scheme, through a spring-sealing plug linkage structure in the automatic pressure relief mechanism, when the internal pressure exceeds a threshold value, a sealing plug is pressed to move upwards, a pressure relief hole communicates with a pressure relief cavity, high-pressure gas is directionally exhausted through a one-way exhaust valve, and shell burst is avoided; after the pressure recovers, the reset spring automatically resets the sealing plug, the sealing performance is maintained, external impurities are prevented from invading, manual intervention is not needed, and repeated and reliable pressure relief is achieved.

The embodiment of the invention provides a pressure release valve for a train, and relates to the technical field of pressure release valves. A pressure relief valve for a train comprises an outer shell, an inner shell, a first pressure relief valve plate, a second pressure relief valve plate and a third pressure relief valve plate, the first pressure relief valve plate, the second pressure relief valve plate and the third pressure relief valve plate are sequentially mounted on the inner side of the inner shell from top to bottom, a first pressure relief spring is mounted between the first pressure relief valve plate and the second pressure relief valve plate, and a second pressure relief spring is mounted between the second pressure relief valve plate and the third pressure relief valve plate. The side end of the top of the outer shell fixedly communicates with a guide pipe, a vent hole is formed in the side end of the bottom of the inner shell, an adjusting mechanism for adjusting the pressure of the first pressure relief spring and the pressure of the second pressure relief spring is installed on the outer shell, and the two-way synchronous adjusting mechanism is arranged so that the pressure relief valve can adjust different pressures needed by different latitudes conveniently. The pressure cover is prevented from being replaced in a high-latitude area, meanwhile, the adjusting pressure of a single pressure relief spring can be relieved, fatigue damage of the pressure relief spring is reduced, aging of the pressure relief spring is slowed down, and therefore the overall service life of the pressure relief valve is prolonged.

To provide a hydraulic vibration isolator having a poppet valve, which comprises a safety function for preventing damage due to overload, and can be easily replaced with an existing product without increasing the size of the existing product.SOLUTION: A poppet valve device 9 comprises a valve case 11, a valve body 13 that opens and closes a valve seat 11a opening into the valve case 11, and a spring 14 that biases the valve body 13 in an opening direction. The valve case 11 comprises: a flange part 11b that is housed in an outer case 10 communicating with an oil passage 8, slidably penetrates a relief valve seat 10a that opens into the outer case 10 to branch off and merge with the oil passage 8, and abuts against the opening peripheral edge of the relief valve seat 10a; and a relief oil passage 11c formed between a side part and an inner wall of the outer case 10 by cutting out a side part. The valve case 11 is biased by a spring 12 in a direction of closing the relief valve seat 10a. In the poppet valve device 9, excessive oil pressure causes the flange part 11b of the valve case 11 to separate from a valve seat 10a of the outer case 10, and the oil pressure is released through the relief oil passage 11c.SELECTED DRAWING: Figure 5

The utility model discloses a methanol fuel supply system of a ship dual-fuel generator, which comprises a methanol fuel supply main pipeline, the methanol fuel supply main pipeline comprises an input pipeline and an FVT input pipeline, and a booster pump, a safety relief valve, a heat exchange system and a filter are sequentially arranged between the input pipeline and the FVT input pipeline. According to the utility model, a high-integration and compact skid-mounted design is adopted, the insufficiency of the ship space is fully considered, and under the condition that the original ship space is utilized, the methanol fuel which is free of impurities and meets the standard can be continuously and stably supplied to the FVT; and a large number of safety measures are designed, so that leakage and seepage of methanol can be effectively handled, and major harm to personnel health and driving safety caused by methanol volatilization is prevented.

The automatic cover plate comprises a base, a seat ring and a toilet cover, the base is provided with an air compression device and a pneumatic limiting device, the air compression device is provided with an air return structure, and the pneumatic limiting device is provided with a slow leakage valve; the seat ring is rotatably mounted on the base, and the seat ring in a seated state can close the slow leakage valve; the barrel cover is rotationally installed on the base and is in transmission fit with the air compression device, a first reset structure matched with the pneumatic limiting device is arranged between the barrel cover and the base, and when the barrel cover rotates from the closed position to the open position, the barrel cover drives the air compression device to exhaust air in the air compression device to the pneumatic limiting device through the first flow channel; the pneumatic limiting device is driven to limit work of the first reset structure. According to the automatic cover plate, the barrel cover can be automatically closed after a period of time of defecation of a user, the problem that the user forgets to cover the barrel cover after defecation is solved, and the user is allowed to open or close the barrel cover at any time according to needs.

A fluid system is provided for an aircraft engine. This fluid system includes a lubricant reservoir and a pressure relief system. The lubricant reservoir includes an internal volume. The pressure relief system includes a sensor system, a pressure relieve valve and a controller. The sensor system is configured to provide sensor data indicative of an air pressure within the internal volume. The pressure relief valve is fluidly coupled with the internal volume. The controller is configured to control operation of the pressure relieve valve based on the sensor data.

The utility model discloses a one-way valve with a pressure relief protection function, and particularly relates to the technical field of one-way valves, which comprises a valve body, a discharge pipe is arranged at one end of the valve body in a penetrating manner, an outer valve sleeve is arranged on one side of the valve body in a penetrating manner, a pressure relief mechanism is arranged in the outer valve sleeve, and the pressure relief mechanism comprises a pressure relief valve seat arranged in the outer valve sleeve. A guide groove is formed in the outer valve sleeve, a guide ring is slidably arranged in the guide groove, a pressure relief valve element is fixedly arranged in the guide ring, a pressure relief spring is fixedly arranged at the top of the pressure relief valve element, an adjusting disc is slidably arranged on the inner wall of the valve body, and a threaded rod is rotatably arranged on one side of the adjusting disc. When the fluid pressure abnormally rises, the pressure relief channel can be automatically opened, the one-way valve and a conveying system are effectively protected, the position of the pressure relief valve element can be conveniently and manually adjusted, pressure relief parameters are flexibly controlled, and the requirements of different working conditions are met.

The utility model discloses a high-pressure inflation pipeline structure wound on an IV-type hydrogen storage cylinder inner container, which comprises a nitrogen cylinder, the output end of the nitrogen cylinder is sequentially connected with a high-pressure reducing valve, a one-way valve, a low-pressure reducing valve, a pressure release valve, a pressure gauge and a stop valve through a high-pressure connecting pipe, and the stop valve is connected with the IV-type hydrogen storage cylinder inner container. The high-pressure inflation pipeline is provided with the high-pressure reducing valve, the one-way valve, the low-pressure reducing valve, the pressure release valve, the pressure gauge and the stop valve, so that the functions of monitoring, adjusting and pressure release of the internal pressure during winding of the IV-type hydrogen storage cylinder liner can be realized, and the problem that the IV-type hydrogen storage cylinder liner is expanded and broken due to overlarge pressure or insufficient support due to oversmall pressure during winding and inflation is avoided; and the normal use and the use safety of the IV-type hydrogen storage bottle liner winding are ensured.

The invention relates to a battery pack and a new energy vehicle. The battery pack comprises a box body, and a battery pack module, an insulating spacer and a liquid cooling plate are sequentially arranged in the box body; a flue and a liquid cooling flow channel are arranged in the liquid cooling plate; a first smoke outlet and a second smoke outlet which are communicated with the flue are respectively formed in the upper surface and the lower surface of the liquid cooling plate; after the explosion-proof valve is opened, gas in the battery cell enters the flue through the first smoke outlet and is discharged outwards along a pressure relief path at the bottom of the battery pack through the second smoke outlet; the pressure relief valve is ingenious in design, it is ensured that gas is effectively discharged in the pressure relief process, and accumulation of internal pressure is reduced; the flue and the liquid cooling flow channel are arranged in the liquid cooling plate at the same time, so that the liquid cooling plate has dual functions of pressure relief and heat dissipation, forced cooling can be performed through cooling liquid while the battery cell is subjected to pressure relief, coordination of thermal runaway suppression and thermal management is realized, and the service life of the battery cell is prolonged; and the battery pack module does not generate short circuit through the insulating sheet when the battery cell is in thermal runaway, so that the smoothness of the pressure relief channel and the electrical safety are ensured.

An airless fluid dispensing apparatus, a stem-less spray valve, and a pressure relief valve are disclosed. The stem-less spray valve comprises a generally cylindrical valve body; a fluid conduit, operable to allow a flow of the fluid from a pump, at least partially through the valve body, to a spray orifice; a movable plug disposed at least partially within the valve body; a seat, shaped to conform to a shape of the movable plug; a spring disposed within the valve body. The spring biases the movable plug against the seat to prevent the fluid from flowing through the fluid conduit to the spray orifice when a fluid pressure is below a spray pressure threshold. When the fluid pressure reaches or exceeds the spray pressure threshold, the spring compresses, at least partially retracting the movable plug away from the seat, and allowing the fluid to flow through the fluid conduit to the spray orifice.

According to the overflow valve with the pressure relief function, a limiting structure is arranged in an overflow pressure adjusting cavity, by limiting the moving distance of an overflow piston, when the pressure at the front end of a pipeline is too large, the pressure relief piston is pushed to move, and then a pressure relief valve is opened; according to the pressure relief valve, the overflow piston is arranged in the pressure relief channel, so that overlarge gas pressure passes through the pressure relief channel, the pressure relief valve port and the cavity between the pressure relief piston and the overflow piston and then is exhausted through the pressure relief exhaust port, the gas pressure at the front end of a pipeline is reduced, that is, overlarge pressure in the corresponding pipeline is reduced, and the problem of gas explosion of the pipeline is avoided.

The invention provides a compressor pressure relief structure, a compressor and an air conditioner. The compressor pressure relief structure comprises a first-stage compression assembly and a second-stage compression assembly. A first pressure relief channel is formed in the partition plate assembly, an assembly avoiding groove and a second pressure relief channel are formed in the second-stage air cylinder, at least part of structure of an opening and closing element is arranged in the assembly avoiding groove, and the opening and closing element can move in the assembly avoiding groove and the second pressure relief channel so that the second pressure relief channel can be communicated with or disconnected from the first pressure relief channel; the opening and closing element comprises a first end and a second end which are opposite to each other, the first end is opposite to the first pressure relief channel so as to bear the gas pressure of the first pressure relief channel, the second-stage air cylinder is further provided with a first back pressure channel, and the first back pressure channel can introduce exhaust gas of the compressor into the assembly avoiding groove; and the pressure acts on the second end so as to apply pressure to the second end. According to the compressor, the technical problem that in the prior art, a rivet pressure relief valve plate structure is adopted for a compressor, and flutter occurs can be solved.

A pressure relief valve 855 comprising a cap 805 with an opening therein, a plunger 810 configured to fill the opening in the cap 805 and a spring 815 configured to hold the plunger against the cap. T

The utility model provides a battery box body, a battery and a power utilization device. And a heat dissipation system is arranged in the battery box body. The heat dissipation system comprises a pressure relief device and a fire extinguishing device. The pressure relief device comprises an exhaust channel and a pressure relief valve, an air inlet of the exhaust channel is formed in the battery box body, and an air outlet of the exhaust channel is communicated with the pressure relief valve. The exhaust channel is used for conveying high-temperature gas to the pressure release valve. And the pressure release valve is used for discharging high-temperature gas in the battery box body. The fire extinguishing device is provided with a containing cavity, and a fire extinguishing medium is stored in the containing cavity. The containing cavity communicates with the exhaust channel, so that the fire extinguishing medium can enter the exhaust channel. According to the pressure relief device, the battery with thermal runaway can be timely cooled and exhausted, so that the safety of the power utilization device is ensured. And a fire extinguishing medium in the fire extinguishing device enters the exhaust channel and extinguishes flames in the exhaust channel, so that the flames are prevented from being exhausted out of the battery box body to cause heat diffusion, the risk of battery damage is reduced, and the safety of the electric device is further ensured.

The utility model relates to the technical field of gas cylinder airtightness testing, and particularly provides a gas cylinder airtightness testing device, which comprises a base, a gas cylinder conveying belt is arranged on the base, the gas cylinder conveying belt comprises a first conveying belt and a second conveying belt, a water tank is arranged between the first conveying belt and the second conveying belt, and a gas cylinder taking and placing mechanism is arranged above a gas cylinder conveying mechanism; an inflation and deflation mechanism and a plurality of rotating shafts are arranged in the pool, the inflation and deflation mechanism comprises a lifting mechanism, a fixed table and inflation connectors, the fixed table is arranged on one axial side of the rotating shafts in a liftable mode through the lifting mechanism, a plurality of fixed plates are arranged on the fixed table, and each fixed plate is rotationally connected with one inflation connector; and the inflating joint is respectively connected with the pressure release valve and the inflating pump. According to the utility model, the automation degree of the gas cylinder airtightness test can be improved, the manpower is saved, the gas cylinder can be overturned by the rotating shaft in the water tank, the position of a leakage point can be observed more easily by overturning the gas cylinder, and the efficiency and effect of the gas cylinder airtightness test are improved.

The invention discloses a supercritical fluid assisted polymer devolatilization distributor. The supercritical fluid assisted polymer devolatilization distributor comprises a gradually-shrinking channel, a throttling channel and a gradually-expanding channel which are connected in sequence. A static mixer is arranged in the throttling channel, the upstream pressure is maintained to be above a supercritical state by increasing fluid resistance, meanwhile, the mixing effect of supercritical fluid and polymer melt is enhanced, stable and uniform foam flow is formed, and pressure fluctuation is avoided; an automatic pressure relief valve assembly is arranged on the upper portion of the divergent channel and composed of a valve opening, a valve cover plate, a spring, an adjusting knob and the like, when the system pressure exceeds a set value, exhaust is automatically started, and controllable pressure relief is achieved. A plurality of rows of flow distribution holes are formed in the lower part of the distributor to ensure that the melt uniformly flows out to form stable melt strips; the problems that traditional equipment is difficult to pressurize and not timely in pressure relief are solved, the supercritical state maintenance, gas-liquid separation and melt forming processes are optimized, the volatile component removal efficiency is improved, the phenomenon that melt strips are broken or accumulated is effectively prevented, and continuous and stable operation of the devolatilization process is guaranteed.

The invention relates to a heat pipe heat exchange device, a condensation channel of the heat pipe heat exchange device is provided with communicating ports, a telescopic sleeve hermetically covers all the communicating ports, a movable plate is hermetically assembled at the end, away from the communicating ports, of the telescopic sleeve, and one end of a stop frame is arranged on the side, back to a condensation section, of the movable plate; the pressure sensing element is installed on the stop frame, the pressure sensing element and the movable plate are arranged in a spaced mode, and the gaseous working medium can push the movable plate to move in the direction away from the communication opening; the controller can control the operation power of the power element and the pressure value measured by the pressure sensing element to be in negative correlation, and when the pressure value measured by the pressure sensing element is larger than or equal to a second warning pressure value, the controller can control the power element to stop operating. According to the heat pipe heat exchange device, the problem that when a heat pipe heat exchanger relieves pressure through a pressure relief valve, leakage and loss of a working medium can be caused is solved.

The invention relates to the technical field of water treatment, in particular to a prawn fry raw water biological filter treatment device. According to the technical scheme, the device comprises a pretreatment box, a disinfection box, an adjusting plate, a fine treatment box, a motor and a purification box, a screw is arranged at the output end of the motor, a nut in threaded installation with the screw is arranged at the upper end of the adjusting plate, the outer wall of the adjusting plate is sleeved with an air bag, an air pump is arranged at the upper end of the adjusting plate, and the air pump and the air bag are communicated and provided with an air supply pipe; a pressure relief valve is arranged in the air supply pipe, a disinfection box is arranged on one side of the lower portion of the fine treatment box, sealing gaskets are arranged on the inner wall of the fine treatment box and the outer wall of the purification box, overflow holes are formed in the side wall of the lower end of the purification box, and a filter material layer is arranged in the purification box. Through modular design, the efficiency and economical efficiency of prawn fry raw water treatment are remarkably improved, and the problems that a large-area biological filter cannot flexibly adjust the treatment capacity and is difficult to adapt to different scale requirements are solved.

A method is provided for the simultaneous detection, localization, and quantification of leaks and obstructions in a gas network under pressure or vacuum. The gas network includes: one or more sources of compressed gas or vacuum; one or more consumers or consumer areas of compressed gas or vacuum applications; pipelines or a network of pipelines to transport the compressed gas or vacuum from the sources to the consumers, consumer areas or applications; a plurality of sensors providing one or more physical parameters of the gas at different times and locations within the gas network. The gas network is further provided with controllable or adjustable relief valves, controllable or adjustable throttle valves and possibly one or a plurality of sensors capable of monitoring the status or state of the relief valves and / or throttle valves.

The invention discloses a PCL supercritical foaming device and a foaming method, and relates to the technical field of PCL foaming equipment.The PCL supercritical foaming device comprises a reaction kettle, a feeding pipe used for adding raw materials is installed on the reaction kettle, a bottom plate is arranged at the bottom of the reaction kettle, a vacuum pump is installed on one side of the top of the reaction kettle, and an air pipe is installed at the input end of the vacuum pump; a pressure release valve is mounted on the side wall of the reaction kettle, and a discharging mechanism and a liquid injection mechanism are arranged on the reaction kettle; the discharging mechanism comprises a first mounting groove, a movable plate and a mounting hinge, the first mounting groove is formed in the position, close to the lower portion, of the side wall of the reaction kettle, the movable plate is movably mounted in the first mounting groove, the mounting hinge is movably mounted between the movable plate and the reaction kettle, and the movable plate is movably mounted on the reaction kettle through the mounting hinge; and the movable plate can turn over by taking the mounting hinge as a base point. According to the reaction kettle, materials can smoothly fall off from the interior of the reaction kettle, and then the effect of rapid discharging is achieved.

The invention discloses an air source heat pump unattended control method and system, and relates to the field of equipment control, and the method comprises the steps: predicting a load demand according to an environment parameter and a building load parameter, and calculating a target water supply temperature based on the load demand; sorting the heat pump units according to the equipment operation duration parameters, distributing a temperature deviation value for each heat pump unit, and calculating the target water supply temperature and the temperature deviation value corresponding to the heat pump unit to obtain the personalized set temperature of each heat pump unit; a starting instruction sequence is generated according to a preset starting condition and the personalized set temperature, and after the water return pressure parameter reaches a preset parameter threshold value after the circulating water pump is started, all the heat pump units are sequentially started according to the personalized set temperature sequence; and a make-up pump and a pressure release valve are controlled according to the return water pressure parameter and the liquid level parameter, and the temperature deviation value of each heat pump unit is adjusted according to the change of the environment parameter and the building load parameter. By implementing the method, the balance of equipment loads in the multi-unit system can be improved.

The invention relates to a monitoring, prevention and control system for filling and pipe plugging, which comprises a ground integrated console, a distributed optical fiber acoustic monitoring system, a pressure detection mechanism and a discharge mechanism, and is characterized in that the ground integrated console is electrically connected with the distributed optical fiber acoustic monitoring system, the pressure detection mechanism and the discharge mechanism through a communication system, and data connection is established; at least one distributed optical fiber acoustic monitoring system and at least one pressure detection mechanism are connected with the pipe wall of the filling pipeline and distributed in the axis direction of the filling pipeline, and the discharging mechanism is connected with the filling pipeline. The use method comprises the following four steps: optical fiber laying, system operation flow, pipe blockage judgment and active prevention and control, and mechanism maintenance. Precise positioning of the pipe blocking position can be achieved, the pipe blocking area is determined in combination with the acoustic signal spatio-temporal evolution law, active regulation and control of filling and pipe blocking are achieved through the pressure release valve and the vibration ring, the problem of response lag caused by traditional manual troubleshooting or single-parameter triggering is solved, and the timeliness of field emergency disposal is improved.

A lubricating system configured to provide a lubricating oil from a lubricant reservoir to a fluid end by use of a pump. The lubricating system has a plurality of check valves that each have an elastomeric insert. The lubricating system also has at least one pressure relief valve that is configured to re-rout lubricant to the lubricant reservoir when needed to stabilize pressure within the system. The lubricating system uses a pump drive controller and at least one sensor to selectively turn the pump on and off.