379 results about "Discharge pressure" patented technology

The invention provides an NMP (N-Methyl Pyrrolidone) purification process based on an NMP rectification system, the process is completed by matching a tail gas desorption tower, the space in the tower is divided into an adsorption bin and a desorption bin by arranging a middle box body, two groups of adsorption devices capable of alternately entering the two bins are mounted, and automatic switching of the adsorption devices is realized by utilizing a driving mechanism; when the adsorption efficiency of one group of adsorption devices is reduced, the adsorption devices are automatically transferred to the desorption bin for regeneration treatment, meanwhile, the other group of adsorption devices enter the adsorption bin to continue working, and in the desorption process, low-pressure saturated steam and hot nitrogen are adopted for purging, so that residual moisture is effectively removed, and the adsorption activity is recovered; compared with the prior art, the process has the advantages that gas exchange in the adsorption and desorption process is reduced, the sealing performance and the air pressure balance control capability of the system are improved, the process ensures continuous production, meanwhile, the energy consumption and the discharge pressure are remarkably reduced, and the NMP purification efficiency and the product quality are improved.

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

A compressor includes a housing, a first compression mechanism and a second compression mechanism disposed in the housing, and a housing cover fixed to the housing. Both the first compression mechanism and the second compression mechanism are configured to compress a working fluid from a suction pressure to a discharge pressure. The first compression mechanism includes a first cylinder housing having a first fluid storage plenum. The second compression mechanism includes a second cylinder housing having a second fluid storage plenum. The housing cover defines an intermediate-fluid port in fluid communication with the first fluid storage plenum via a first intermediate-fluid passage and the second fluid storage plenum via a second intermediate-fluid passage. Working fluid at an intermediate pressure enters the intermediate-fluid port. The intermediate pressure is greater than the suction pressure and less than the discharge pressure.

According to the diaphragm compressor oil mass self-balancing system and the control method, the needed oil supplementing amount and the working state of a diaphragm compressor are calculated and judged through measurement data of exhaust pressure, transient oil pressure and the oil supplementing amount, and data are measured through a pressure sensor and a flow meter and transmitted to a control unit; the required oil supplementing amount is calculated, the working state of the diaphragm compressor is judged, the opening degree of a proportional overflow valve on an oil supplementing loop is controlled, accurate automatic control over the hydraulic oil amount of an oil cavity of the diaphragm compressor and dynamic balance of the oil amount are achieved, and the problem that an executing mechanism acts too frequently can be solved through the oil supplementing method; the overflow valve realizes the change of the oil discharge pressure along with the exhaust pressure, and avoids the problem caused by higher oil pressure. The problem that the diaphragm flaps the cylinder due to the fact that the oil quantity of the oil cavity is reduced under the conditions of starting, working condition change, piston ring abrasion and the like can be effectively solved.

The invention discloses an underground garage spontaneous combustion management and control system, method and device based on AGV carrying, and relates to the technical field of garage spontaneous combustion management and control. The underground garage spontaneous combustion management and control system based on AGV carrying comprises an AGV carrying module; a fire extinguishing analysis module; a smoke diffusion analysis module; and a smoke discharge response analysis module. According to the invention, the AGV carrying robot carries the abnormal vehicle to the safe room for fire extinguishing, then carries out fire extinguishing analysis on the abnormal vehicle in the safe room and judges whether to carry out smoke discharge pressure dynamic optimization or not, and then carries out smoke diffusion analysis on the abnormal vehicle in the safe room and judges whether to carry out smoke discharge speed influence dynamic optimization or not. And finally, the smoke exhaust device is subjected to response analysis and whether smoke exhaust control optimization is carried out or not is judged, so that the effect of improving the safety in underground garage vehicle spontaneous combustion control based on the AGV is achieved, and the problem of low safety in underground garage vehicle spontaneous combustion control based on the AGV in the prior art is solved.

The utility model provides a beverage container, and belongs to the technical field of containers. The technical problem that an existing beverage container is large in liquid outlet pressure is solved. The beverage container comprises a barrel body, a connector pipe and a wine spear installed at a barrel opening of the barrel body, the wine spear comprises a liquid outlet valve element, one end of the connector pipe is inserted into the wine spear downwards and abuts against the liquid outlet valve element, a gas cylinder is fixedly arranged in the barrel body and comprises an exhaust valve, the periphery of the connector pipe is provided with a protruding column arranged downwards, and the protruding column is fixedly connected with the liquid outlet valve element. The gas cylinder is connected with an exhaust valve used for controlling the gas cylinder to be opened and closed, and the protruding column moves downwards to trigger the exhaust valve to be opened. According to the beverage container, the gas cylinder is deflated only when beverage is discharged, and it is guaranteed that the pressure in the barrel is not too large.

The invention discloses a linear cooling control method of an environmental test box and the environmental test box. The method comprises the following steps: acquiring the temperature in a to-be-controlled environment test box, the outlet temperature of an evaporator, the liquid supply temperature of a condenser, the suction pressure of a variable-frequency compressor and the exhaust pressure of the variable-frequency compressor; according to the temperature in the box, the evaporator outlet temperature, the condenser liquid supply temperature, the frequency conversion compressor suction pressure, the frequency conversion compressor exhaust pressure and preset parameters, the frequency conversion compressor rotating speed, the electronic expansion valve opening degree, the evaporator fan rotating speed and the condenser fan rotating speed of the to-be-controlled environment test box are calculated; based on the calculated rotating speed of the inverter compressor, the calculated opening degree of the electronic expansion valve, the calculated rotating speed of the evaporator fan and the calculated rotating speed of the condenser fan, the inverter compressor, the electronic expansion valve, the evaporator fan and the condenser fan of the to-be-controlled environment test box are controlled respectively, and linear cooling control over the to-be-controlled environment test box is achieved.

To put new thought to a control method, and to obtain good operability, upon providing a control circuit for option hydraulic actuator in a hydraulic circuit for a working machine. There is provided an option merging oil passage that allows the discharge oil of the first, second hydraulic pumps to be merged thereinto, and the option merging oil passage is provided with an option control valve and a compensator valve, and is configured such that a variable relief valve is connected to a signal pressure introduction oil passage connected to the compensator valve, a supply pressure to an option hydraulic actuator can be variably controlled by changing a relief setting pressure of the variable relief valve; on the other hand, distributed flow rate computation with respect to the other hydraulic actuators, opening area control of the option control valve, the other hydraulic actuators control valves, and discharge pressure control of the first, second hydraulic pumps are optimized.

In a fuel supply system that supplies gaseous fuel to the engine of a vehicle, the fluid pressure of the discharged gaseous fuel can be adjusted by electronic control, and the fluid pressure of the gaseous fuel can be safely released in the event of a malfunction such as a power supply failure. [Solution] In a fuel supply system 100 that supplies gas fuel to an engine 6, the system includes an electronically controlled regulator 3 that reduces the introduced gas fuel to a set pressure and discharges it, a pressure sensor 7 that detects the fluid pressure of the gas fuel after reduction, and a normally open electromagnetic relief valve 8 provided downstream of the pressure regulating valve of the electronically controlled regulator 3. The electromagnetic relief valve 8 opens when the fluid pressure detected by the pressure sensor 7 reaches a pressure threshold or when the system is not energized, releasing the gas fuel outside the system.

The invention provides a graded anti-explosion warehouse, and relates to the technical field of storage and transportation, the graded anti-explosion warehouse comprises a warehouse body, an explosion venting roof structure, a first explosion venting structure, a second explosion venting structure and a third explosion venting structure, the explosion venting roof structure is arranged on the warehouse body in a liftable manner, and a pressure relief gap can be formed between the explosion venting roof structure and the warehouse body; the first explosion venting structure can vent explosion and discharge pressure when the pressure of the storage cavity reaches a first pressure value; the second explosion venting structure can venting explosion and discharging pressure when the pressure of the storage cavity reaches a second pressure value, the third explosion venting structure is connected with the bin body and the explosion venting roof structure, and the third explosion venting structure can be disconnected to release the explosion venting roof structure when the pressure of the storage cavity reaches a third pressure value. A graded explosion venting structure is formed, when an explosion dangerous case occurs, the first explosion venting structure, the second explosion venting structure and the third explosion venting structure are preferentially damaged instead of the warehouse main body structure, so that the subsequent repair cost is reduced, and the warehouse can quickly recover production after being checked and repaired.

The present invention relates to an automotive pendulum-slider pump (10, 10') for providing pressurized lubricant. The automotive pendulum-slider pump (10, 10') includes a non-rotatable rotor housing (12); a rotatable rotor ring (20, 20') that rotates within the rotor housing (12) and surrounds a pumping chamber (25) having an intake opening (18) and an exhaust opening (19); a rotatable rotor hub (35) that is rotatably connected to the rotor ring (20, 20'); and a plurality of pendulum blades (30) arranged at equal angles on the circumference of the rotor ring (20, 20') and each blade (30) is pivotally hinged by a separate pendulum hinge (32) at the rotor ring (20, 20'). The vanes (30) divide the fluid in the pumping chamber (25) into multiple pumping compartments (40), wherein the pumping chamber (25) is equipped with an automatically switching pressure matching valve (50, 50') for pre-opening the fluid connection between at least one pre-openable pumping compartment (40B) and the discharge opening (19) just before the pumping compartment (40B) has reached the discharge opening (19). The pre-opening fluid connection provides pressure matching between the pre-openable pumping compartment (40B) and the discharge pressure to reduce noise emissions caused by pressure pulsations resulting from sudden pressure equalization that occurs when the pumping compartment (40) reaches the discharge opening (19).

A method of controlling a pumping stage of a fracturing fleet at a wellsite with at least two electric frac pumps to increase the efficiency of the electric frac pumps comprises communicating an interim flowrate to the electric frac pumps and calculating an efficiency value from measured power from the VFD and measured flow rate, intake pressure, and discharge pressure. The method can increase a total efficiency of the fracturing fleet above a threshold efficiency value by iterating the interim setpoint from a first interim setpoint to a second interim setpoint for the electric frac pumps, wherein the second interim setpoint decreases the flowrate to the less efficient electric frac pumps and increases the flowrate an equal amount to the more efficient electric frac pumps.

The present application provides a capacity control valve with high control accuracy and excellent energy efficiency in normal control. The capacity control valve (V) has a valve housing (10) formed with a discharge port (12) through which a discharge fluid of a discharge pressure (Pd) passes, a suction port (13) through which a suction fluid of a suction pressure (Ps) passes, and a control port (13) through which a control fluid of a control pressure (Pc) passes; a rod (83) driven by a solenoid (80); and a main valve (50) composed of a main valve seat (10a) and a main valve core (51), the communication between the discharge port (12) and the control port (14) being opened and closed by the movement of the rod (83), the capacity control valve being provided with a CS valve (56) between the control port (13) and the suction port (14), the CS valve (56) being controlled by the dynamic pressure of the fluid flowing from the discharge port (12) to the control port (13) through the opening of the main valve (50).

To provide a scroll-type compressor capable of discharging a refrigerant from a back pressure chamber without depending on a position of a turning scroll during stop of an operation.SOLUTION: A scroll-type compressor 10 includes a housing 11, a support member 13 that supports a rotating shaft 15, a fixed scroll 25 and a turning scroll 26. The scroll-type compressor 10 includes a suction pressure region, a compression chamber 27, a discharge pressure region and a back pressure chamber 50. The back pressure chamber 50 communicates with the suction region by using an intermittent exhaust passage 60 and communicates with the discharge pressure region by using an exhaust passage 70. An exhaust valve enabling switching between an exhaust state and a non-exhaust state is disposed in the exhaust passage 70. The exhaust valve becomes the exhaust state when pressure of the back pressure chamber 50 is higher than that of the discharge pressure region. When stopped, the scroll-type compressor 10 can discharge the refrigerant in the back pressure chamber 50 by using the exhaust passage 70 even if the intermittent exhaust passage 60 and the suction pressure region are shut off by the turning scroll 26.SELECTED DRAWING: Figure 1

The application discloses an air conditioner control method and device, an air conditioner and a storage medium, and belongs to the technical field of air conditioners. The application obtains the discharge pressure and the return air pressure of the compressor; controls the operation of the flow regulating device according to the discharge pressure and the return air pressure, detects the discharge pressure and the return air pressure of the compressor in real time, then adjusts the flow regulating device according to the detected discharge pressure and return air pressure, adjusts the flow regulating device, and effectively avoids the situation that the compression ratio of the compressor is increased, further protects the compressor, and prolongs the service life of the compressor.

The application relates to an air conditioning unit which comprises a compressor, a heat exchanger assembly, a four-way valve and a controller, the controller being connected with the compressor, the four-way valve, a suction pressure sensor and a discharge pressure sensor, when the discharge pressure Pd and the suction pressure Ps satisfy Pd P1 and Pd-Ps

This invention provides a pump body assembly and a compressor. The pump body assembly includes a cylinder liner, a piston, and a muffler structure. The cylinder liner has an inlet and an outlet. The piston is slidably disposed within the cylinder liner to form a variable volume chamber, and the variable volume chamber is located in the sliding direction of the piston. The muffler structure is connected to the cylinder liner and has a muffler cavity. The cavity wall of the muffler cavity has a communication hole for communicating with the outlet, and the cavity wall also has a pressure relief port. When the piston is in the inlet position, the inlet communicates with the variable volume chamber; when the piston is in the outlet position, the outlet communicates with the variable volume chamber; and when the outlet pressure reaches a preset outlet pressure, the pressure relief port is opened. This invention solves the problems in the prior art where oil-containing refrigerant in the compressor severely affects the thermal efficiency of the refrigeration equipment, and where fluctuations in outlet pressure lead to an excessively high suction-to-discharge pressure ratio.

To provide a work vehicle capable of improving fuel economy by the control to switch modes between an economy mode and a standard mode at an appropriate timing, and capable of eliminating the troublesomeness of manually switching the modes between the standard mode and the economy mode.SOLUTION: A work vehicle 1 includes an engine 20, a first hydraulic pump 31, a second hydraulic pump 32, a travelling device 6, a work device 9, an operation device 5, an ECU 30, and a vehicle controller 7. The vehicle controller 7 transmits a control command in a standard mode to the ECU 30 when the travelling device 6 is stopped, discharge pressure from the second hydraulic pump 32 is a reference value U1 or more, and a first period T1 passes with an engine load factor of a predetermined upper limit E1 or more, transmits a control command in an economy mode to the ECU 30 when a second period T2 passes with the engine load factor of a predetermined lower limit or less, and transmits a control command in the standard mode to the ECU 30 when the travelling device 6 is actuated.SELECTED DRAWING: Figure 1

The present application relates to the technical field of carbon dioxide heat pump system, and provides a charging amount calculation method and system for a carbon dioxide heat pump system for vehicles, comprising: based on the architecture of a carbon dioxide cycle heat pump system, a carbon dioxide cycle heat pump system model is constructed; for each heat pump system operation mode, based on the environmental parameter boundary and the heat pump system operation parameter boundary, different refrigerant charging amounts are given, the carbon dioxide cycle heat pump system model is used to calculate the evaporator inlet refrigerant temperature, the evaporator outlet refrigerant temperature and the compressor discharge pressure, and the charging amount interval is determined; the intersection area of the charging amount intervals under all heat pump system operation modes is taken as the charging amount interval range suitable for the carbon dioxide cycle heat pump system. The best charging amount of the CO2 cycle heat pump system is obtained by means of simulation calculation, which replaces the experimental research mode and saves the project development cycle and cost.

Nozzle (10) for countercurrent injection of a liquid material for mixing with other components, comprising: - a nozzle housing (20) having at least one inlet opening (26) for supplying a liquid material and a nozzle outlet (22) for discharging the material, - wherein the nozzle housing (20) has a piston chamber (23) extending along a longitudinal axis (L) of the nozzle housing (20); - a nozzle piston (60) which is axially displaceable in the piston chamber (23) along the longitudinal axis (L) and separates a material chamber (24) and a pressure fluid chamber (25) from each other, - wherein a material surface (61) of the nozzle piston (60) can be subjected to a material pressure (PM) of the material and a pressure fluid surface (62) of the nozzle piston (60) can be subjected to a control pressure (PC) of a pressure fluid; - a nozzle needle (40) which is connected to the nozzle piston (60) and forms a variable nozzle opening (42) with the nozzle outlet (22); - a sealing device (70) that seals a circumferential gap (83) between the nozzle housing (20) and the nozzle piston (60), - wherein the control pressure (PC) in the pressure fluid chamber (25) is adjustable to control a discharge pressure (PA) of the material at the exit from the nozzle opening (42), wherein - the sealing device (70) comprises first and second sealing elements (71a, 71b), characterized by the fact that - the nozzle piston (60) forms a receptacle (68) for the sealing device (70), - the sealing device (70) has a sealing retaining ring (63) with circumferential recesses (67a, 67b) for receiving sealing elements (71a, 71b), - from the material surface (61) at least one connecting channel (66a) between the material chamber (24) and a circumferential recess (67a) and - at least one connecting channel (66b) is formed between the pressure fluid surface (62) and a circumferential recess (67b), - the first and second sealing elements (71a, 71b) are each designed as a sealing ring with a C-profile and a lateral circumferential groove (72a, 72b), - wherein the circumferential groove (72a) of the first sealing element (71a) is oriented towards the material surface (61) and the circumferential groove (72b) of the second sealing element (71b) is oriented towards the pressure fluid surface (62), - wherein the sealing element (71a, 71b) expands in a radial direction when the circumferential groove (72a, 72b) is filled with a pressurized liquid, for example the material or the pressurizing fluid.

In the double-rotation scroll compressor, a scroll compression part (80) is accommodated in a suction chamber (61A). A pressure adjustment chamber (76) is provided on one side of the scroll compression section (80) in the thrust direction, and the pressure adjustment chamber (76) reduces the thrust load acting in the thrust direction on the scroll compression section by introducing a fluid having a suction pressure in the suction chamber, a discharge pressure in the discharge chamber, or an intermediate pressure between the suction pressure and the discharge pressure. The discharge pressure of the fluid introduced into the pressure adjustment chamber (76) counteracts the discharge pressure acting on the scroll compression section (80) from the other side in the thrust direction. As a result, the thrust load on the scroll compression part (80) on one side of the housing (60) in the thrust direction is reduced.

The utility model discloses an outdoor high -voltage cabinet's burning arc pressure -relief device, and pressure -relief device includes: base subassembly, passageway subassembly and apron subassembly, wherein, base subassembly is used for installing high -voltage cabinet, and the bottom of base subassembly and high -voltage cabinet forms the channel of linking up, passageway subassembly includes pressure -relief channel, and pressure -relief channel includes air intake and gas outlet, and air intake is communicated with the channel of linking up, and gas outlet is located high -voltage cabinet top surface and is communicated with the outside, apron subassembly is located gas outlet, and apron subassembly is used for controlling the opening and closing of gas outlet, and the utility model discloses a channel of linking up and pressure -relief channel are set up, and the pressure -relief airflow is led out the cabinet from high -voltage cabinet inside, and the direction of gas outlet controls the pressure -relief direction from below to top, makes the pressure -relief airflow discharge from high -voltage cabinet top, avoids the harm to the surrounding personnel and things. The utility model is applicable to the field of distribution cabinet pressure relief.

An air gun assembly includes a gun tube and a pressure tube assembly. The gun tube defines a first aperture. The pressure tube assembly includes a fill block and a cylinder coupled to each other. The fill block defines a second aperture and the cylinder defines a chamber configured to contain compressed gas. The air gun assembly includes a pin disposed through the first aperture and the second aperture to couple together the fill block and the gun tube. The pin defines a channel. The air gun assembly also includes a valve assembly attached to the pin and at least partially disposed inside of the channel. The valve assembly is configured to selectively allow fluid communication into the chamber via the channel.

This invention provides a vane pump that can reduce the sliding resistance of the rotor by ensuring a gap between the side plate and the rotor. [Solution] The vane pump 100 according to the present invention comprises a rotor 102 rotatable around an axis 110, a plurality of vane grooves 108 formed radially on the outer circumferential surface of the rotor, a plurality of vanes 106 fitted into the plurality of vane grooves and slidably protruding from the rotating rotor, two side plates 114, 116 arranged on both sides of the rotor and facing the side surface of the rotor, and back pressure grooves 132, 134, 142, 144 formed on the side plates, which are able to communicate with the axis side of the vane grooves of the rotor and through which discharge pressure is guided, and the two side plates have continuous annular protrusions 152, 154 formed on the sliding surfaces 122, 146 facing the rotor and located axis side of the back pressure grooves.

The utility model discloses a low-inlet and high-outlet type depressurization regulating valve which is of a low-inlet and high-outlet structure, that is, an inlet of a fluid inlet channel is lower than an outlet of a fluid pressure relief channel, and the fluid inlet channel can guide fluid to the bottom of a liquid inlet channel; the fluid is discharged out of the pressure relief cavity in the circumferential direction of the valve element after being subjected to pressure relief through at least one bent part of the flow slowing channel, the pressure relief cavity guides the fluid to the fluid pressure relief channel to be discharged, the low-inlet and high-outlet structure counteracts fluid kinetic energy through gravitational potential energy, the flow speed of the fluid entering the valve element is reduced, and erosion to the adjusting valve is reduced.

The refrigeration device using an R454C refrigerant has, as compared with the refrigeration device using an R32 refrigerant, a higher ratio of a discharge pressure to a suction pressure of a compressor, and a larger impact load applied to a bearing portion of a crankshaft, so that the bearing portion is easily damaged. An air conditioning device (1) comprises a refrigerant circuit (10) and an outdoor unit control unit (71). The refrigerant circuit (10) has a compressor (11). The refrigerant circuit (10) circulates a refrigerant by the compressor (11) to perform a refrigeration cycle. The outdoor unit control unit (71) performs control relating to the refrigeration cycle. The compressor (11) has a compression chamber (Sc) in which the refrigerant is compressed, and an injection pipe (53) that communicates with the compression chamber (Sc). A ratio of a discharge pressure to a suction pressure of the compressor (11) is 4.5 times or more and 6.25 times or less a compression ratio of the compression chamber (Sc). The outdoor unit control unit (71) performs control such that a first ratio, which is a ratio of the flow rate of the refrigerant flowing through the injection pipe (53) to the flow rate of the refrigerant circulating through the refrigerant circuit (10), is 79% or more.

The utility model provides a waste discharge pressure wave air valve which comprises a panel, a main air door and a buffering air door are arranged on the panel, a main air door plate and a buffering air door plate which can seal and press the air doors are installed on the rear side of the main air door and the rear side of the buffering air door respectively in a matched mode, and the main air door plate is an I-shaped plate which can seal and press the two main air doors at the same time. A first support and a second support are arranged on the rear side of the panel and arranged on the rear side of the main air door plate and the rear side of the buffering air door plate respectively, a first air cylinder and a second air cylinder are installed in the middle of the first support and the middle of the second support respectively, and a piston rod of the first air cylinder is connected with the middle of the main air door plate through a connecting plate. Piston rods of the second cylinders are connected with the middles of the buffer damper plates. The buffer air door is innovatively adopted, the resistance when the pressure air distribution valve is closed can be effectively reduced, the service life is prolonged, and therefore it can be effectively guaranteed that in-vehicle environment is not affected by external pressure fluctuation in the high-speed running process of a rail transit vehicle, and the comfort level of passengers is improved.

The application discloses a fly ash sampling device of a coal ash conveying system of a thermal power plant, relates to the technical field of coal ash sampling and detection of power plants, and aims to solve the problems of dust pollution and direct spraying of high-temperature ash samples. Coal ash enters and impacts the filter through the connecting part. The pressure of the coal ash main conveying pipe is greater than the pressure inside the fixed ring. The filter collects coal ash until the filter is blocked. At this time, the air pressure is greater than the elastic force of the reset assembly, thereby driving the filter to move downward, so that the inner container filter screen is exposed. At this time, the gas preferentially passes through the inner container filter screen and is discharged from the exhaust cavity, avoiding the problem of fly ash. The air impact ring groove heat dissipation barrel is buffered and enters from the inlet, passes through the heat dissipation channel, is buffered and heat-dissipated, and is discharged from the outlet. Then, the heat is dissipated through the heat dissipation disc and is discharged from the support plate to be heat-dissipated and buffered by the ground. The gas is not only subjected to cooling treatment, but also can be buffered. Finally, the gas discharge pressure and temperature are reduced, and the safety is high.

A pipeline shaft pump for extracting fluid from a geothermal production well is proposed, wherein the geothermal production well includes an inner well surface, and wherein the pipeline shaft pump includes a drive unit and a hydraulic unit having a rotor, wherein the hydraulic unit includes: an inlet section for receiving fluid under suction pressure; an outlet section including a discharge head for discharging fluid under discharge pressure; and a riser pipe. The invention also proposes a method for installing the pipeline shaft pump.

The utility model discloses an underground water seal type gas blowout prevention system which comprises an inner inserting sleeve arranged at a drilling opening, and the outer end of the inner inserting sleeve is connected with a section of blowout prevention sleeve. The top of the first section of blowout prevention sleeve is connected to a header pipe located at the top of a roadway through a first drainage sub-pipe; the bottom of the first-section blowout prevention sleeve is connected with a slag receiving box, and the lower part of the slag receiving box is communicated to a water seal container; a water seal vertical plate is arranged in the water seal container, and the bottom end of the water seal vertical plate is located below the liquid level in the water seal container. The inner cavity of the water seal container is divided into a gas discharge cavity and a slag discharge cavity by the water seal vertical plate; the gas discharge cavity is connected to a main pipe through a first drainage opening of the gas discharge cavity, and the gas discharge cavity is further connected with a gas collection bag; according to the utility model, the water seal system is additionally arranged below the section of blowout prevention sleeve, so that when the gas pressure is large, a large part of gas can be buffered by the slag receiving box and the water seal container and then enters the main pipe of the drainage system, and the gas discharge pressure of the first drainage sub-pipe in the original drainage system is greatly reduced.