40 results about "Liquid piston" patented technology

A toe valve system positioned along a tubing string. The toe valve system a piston sleeve slidably disposed in an outer housing which has ports therethrough. The toe valve system comprises a shifting sleeve shiftable between positions with respect to the ports. A piston sleeve initially held in a position closing off the at least one port to prevent flow between the interior and exterior of the tubing string. A compensator sleeve mounted within the outer housing, wherein the compensator sleeve is free floating and can accommodate changes in tubing pressure. A piston chamber filled with a liquid which is located between the piston sleeve, the compensator sleeve and the outer housing. The liquid in the piston chamber is retained by a rupture disk that can release the liquid when sufficient pressure is applied within the toe valve system causing the piston sleeve to move and opening the ports.

The invention discloses a liquid piston and water foam compounded multi-stage isothermal compression device and method, the device mainly comprises a low-pressure compression cavity and a high-pressure compression cavity, the liquid piston is utilized to realize preliminary compression of gas, and the water foam is introduced in the multi-stage compression process to enhance heat exchange. Gas compressed by the low-pressure compression cavity is introduced into a liquid working medium at the bottom of the high-pressure compression cavity, water foam is spontaneously generated, compression heat is efficiently absorbed through the large specific surface area of the foam, and the nearly isothermal compression process is achieved. According to the device, single-stage power loss is reduced through multi-stage compression, the throttling valve is used for regulating and controlling the gas inlet rate so as to control foam generation, a liquid working medium is recycled through the gas-liquid separation mechanism, and therefore the system energy efficiency and the output gas purity are improved. Different from an existing mode of generating foam by depending on an additional power mechanism, the device can form foam by directly blowing the low-pressure compressed gas into the liquid without additional energy consumption, so that the efficiency and the economical efficiency of the compressed air energy storage system can be remarkably improved.

According to the piston rotation duration measuring and calculating device for the liquid piston type pressure gauge, the piston to be measured is installed through the installation base on the inspection bench, the piston can rotate on the installation base, images are collected in real time through the high-speed camera assembly above the piston in the piston rotation process, and the piston rotation duration measuring and calculating device is used for measuring and calculating the piston rotation duration of the liquid piston type pressure gauge. The camera is used for collecting images of the piston to be measured and transmitting the collected images to the industrial control host assembly, and the industrial control host assembly is used for analyzing the obtained images, so that measurement and calculation of the rotation duration of the piston are completed, and data of the rotation duration of the piston to be measured are obtained. According to the utility model, image detection is used for measuring and calculating the rotation duration of the piston, and the obtained images are identified frame by frame, so that the measurement result of the rotation duration of the piston is obtained; the technical problems that in the prior art, the rotation duration of the piston of the liquid piston type pressure gauge is measured and calculated through a manual meter clamping mode or a photoelectric sensor and a coded disc mode, errors are large, and use is inconvenient are solved.

The utility model discloses an efficient waste liquid purification system for processing, which relates to the technical field of electrophoresis waste liquid purification treatment and comprises a pump liquid piston inserted into a driving seat. The mixing assembly can be driven by the driving motor to mix waste water and liquid medicine in the treatment barrel for use, meanwhile, the liquid pumping assembly can pump the agent in the liquid storage barrel into the treatment barrel in the stirring and mixing process, the agent can be pumped into different depths of the waste liquid in the treatment barrel in a layered mode, and the treatment efficiency is improved. The flocculation reaction device can be fully mixed, stirred and flocculated with waste liquids at different depths, is high in mixing efficiency and mixing uniformity, and solves the problems that when a flocculation reaction device used in the existing electrophoresis waste liquid purification treatment is used, a flocculation agent and to-be-treated waste water enter a treatment barrel in batches, so that the flocculation agent and the to-be-treated waste water are layered, and the flocculation effect is poor. The mixing efficiency is slow and the mixing uniformity is poor during subsequent stirring and mixing.

The invention discloses a two-stage push rod assembly based on a built-in spring and a foam pump distributor thereof. Comprising a push rod body, a connecting piece, an elastic reset piece and a transmission rod. The foam pump distributor further comprises a main body, a thread outer sleeve, a pump head, a gas pumping piston, a liquid pumping piston and the secondary push rod assembly. A pump head is pressed to drive an air pumping piston and a liquid pumping piston to be pushed downwards, the cooperative work of pumping and pushing is synchronously completed in the pressing stroke, and liquid and air are quantitatively conveyed to a mixing cavity through a flow divider to be foamed and sprayed out; meanwhile, the pump liquid piston abuts against and pushes the push rod body to press the push rod body downwards to a preset extending stroke position; on the premise that the overall size of the distributor is not increased, the foam pumping function and the push rod stretching-out function are highly integrated in single-time pressing operation, the structure is compact, the action is reliable, and the function integration degree and the user experience of a product are remarkably improved.

GROUPED MECHANO-LIQUID PISTON HEAT PUMP The grouped mechano-liquid piston heat pump (1) comprises a blind liquid cylinder of compressors (8) in which a double-acting hydraulic piston of compressors (10) moves to form a first and second hydraulic variable volume of compressor (12, 134), and a blind liquid cylinder of expansion valves (30) in which a double-acting hydraulic piston of expansion valves (39) moves to form a first and second hydraulic variable volume of expansion valve (44, 46), said hydraulic variable volumes (12, 134, 44, 46) communicating with compressor and expansion valve gas and liquid reservoirs (14, 29, 50, 55) in which are housed compressor and expansion valve heat exchange and accumulation means (16, 59, 139, 70), this to form a compressor (3) and a regulator (4). Figure for the abbreviation: Fig. 4

The application provides a kind of liquid piston compressor segmented speed trajectory optimization control method and system, it is related to liquid piston compressor control technical field, obtains initial gas state, target termination volume, target pressure ratio and total compression time, according to initial gas volume, target termination volume and liquid piston equivalent action area determine total stroke and reference average speed;Compression process is divided into multiple speed control sections, non-dimensional speed and time coefficient are used for segmented speed trajectory parameterization, to generate candidate trajectory;Candidate trajectory is subjected to termination displacement constraint check and normalization repair;With peak temperature and maximum pressure change rate as evaluation index, under the constraint of maximum speed, maximum acceleration and termination pressure ratio allowable deviation, fitness function is constructed and speed parameter is optimized;According to the optimization result, speed command or displacement command is generated;Under the premise of meeting the ability of actuator and termination pressure ratio deviation requirement, effectively reduce the peak temperature and pressure change rate of compression process.

The paper presents an invention regarding a SPM smart power module, intended for the creation of distributed, safe and efficient energy networks. An elementary module is composed of an innovative Carnot Battery, with high power density, consisting of a heat engine / heat pump whose working agent (gas or vapor) goes through a Carnot / Ericsson / Stirling cycle and which transfers thermal energy between two accumulators with different temperatures. In supply mode, the cycle is run in the direct direction and supplies mechanical / electrical energy, and in charging mode, the heat pump receives energy from the outside (from the network or from renewable sources), and the cycle is run in the opposite direction, transferring thermal energy from the cold reservoir to the hot reservoir. The maximum efficiency of the battery is ensured by at least two isothermalizers, similar to the one described in PCT / R02023 / 050009. Through a system of tanks, heat exchangers, circulation pumps, solenoid valves and pipes, the elementary module can receive a series of extensions, both on the thermal energy capture and distribution side. An intelligent processor collects signals from the SPM system, from a dispatcher, from the Internet, etc, processes them, then sends commands to the motors that actuate the solid pistons of the isothermalizers, the flow regulators of the liquid pistons and of the cooling systems, the solenoid valves, the circulation pumps, in such a way as to ensure the maximum exergetic and economic efficiency of the module, the flattening of load peaks, the maximum safety, the maximum utilization coefficient of all components. Any energy production unit and any consumer can be included in a smart module that ensures the storage, then the supply of the entire energy offers, ensuring consumers a safe, uninterrupted supply.

The application relates to a damping buffer device for connecting large floating bodies, which comprises a shell, even liquid dampers are arranged on both sides of the shell, the liquid dampers on the same side are symmetrically arranged in pairs with respect to the shell, piston shafts connected with the floating bodies are arranged on the liquid dampers, the liquid dampers comprise cylinder bodies, piston plates in sliding connection with the inner walls of the cylinder bodies are arranged in the cylinder bodies, the lower side regions of the piston plates are in communication with the interiors of the shells and are filled with buffer damping liquid, the upper side surfaces of the piston plates are fixedly connected with the piston shafts, the upper ends of the cylinder bodies are closed structures and form branch buffer cavities with the piston plates, the branch buffer cavities are filled with buffer damping liquid, the branch buffer cavities on the two liquid dampers symmetrically arranged with respect to the shell are communicated with each other through connecting pipes, the application has simple structure and low manufacturing cost, can realize flexible liquid buffering of different dimensions and different angles of the floating bodies connected on both sides, and can avoid the breakage or damage of the floating bodies caused by rigid contact.

The utility model belongs to the technical field of spray covers, and mainly relates to a spray cover and an aerosol can, the spray cover comprises a pressing block movably assembled on a can body, the pressing block is provided with an insertion pipe and a nozzle which are communicated with each other, and the outer side of the insertion pipe is sleeved with a slow release assembly; the slow release assembly comprises a piston and a cavity with a sealed cavity, the piston and the cavity are connected to the outer side of the insertion pipe in a sleeving mode, and the piston is fixedly connected with the pressing block through a sleeve connected to the insertion pipe in a sleeving mode. The cavity is used for being filled with liquid with viscous resistance, the piston divides the cavity into a first cavity and a second cavity which are communicated with each other, and the pressing block is moved to drive the piston to slide in the cavity so that the liquid can flow between the first cavity and the second cavity; the insertion pipe is sleeved with a spring, and the two ends of the spring are connected with the pressing block and the cavity respectively. The reset speed of the pressing block is delayed through the synergistic effect of the viscous resistance of the slow release assembly and the elastic force of the spring, and therefore the valve rod can still be kept in the open state temporarily after pressing is stopped, and continuous release of spray is achieved.

The mechanical liquid piston slow expansion compressor (1) comprises a liquid cylinder (8) which pivots about a tilt axis (9) and into which a hydraulic piston (10) translates, which is fixedly secured to a connecting rod (11) connected to a crank (26) of a crankshaft (24), the axis of rotation of which is parallel to the tilt axis (9), while piston guiding means (23) maintain the connecting rod (11) and the hydraulic piston (10) always parallel to the liquid cylinder (8), these two latter forming a variable hydraulic volume (12) filled with a working liquid (13) which communicates with a gas and liquid reservoir (14) in which heat exchange and accumulation means (16) are housed, said reservoir (14) and said liquid (13) forming a variable pneumatic volume (2) in which a working gas (5) is compressed or expanded.

The invention belongs to the technical field of energy storage, and discloses a high-pressure compressed air energy storage system and method based on a double-tank liquid piston system.The system comprises two pressure tanks, a water pump, a control valve set, a compressed air inlet system, a high-pressure air outlet system and a heat energy management system, a heat insulation air bag is arranged in at least one pressure tank, air which is pre-compressed to original energy storage pressure is guided into the heat insulation air bag through a compressed air inlet system, air which is compressed to the highest safety pressure of a salt cavern is transferred to the salt cavern to be stored through a high-pressure air outlet system, and heat generated in the compression process is recycled through a heat energy management system. According to the method, high-pressure compressed air energy storage is achieved through the system, and two compression processes are included. Compressed air can be further compressed to the highest safety pressure of the salt cavern from the conventional energy storage pressure, so that the capacity and efficiency of an energy storage system are improved, and the unit energy storage cost is reduced.

The application discloses a compressed air energy storage power generation system with high response speed and an operation method thereof. The outlet of a heat accumulator is connected with the inlet of a double-tank liquid piston, the outlet of the double-tank liquid piston is connected with a gas storage tank, and the outlet of the gas storage tank is connected with the inlet of an expansion generator set and the inlet of the double-tank liquid piston. A heat exchanger is arranged in the expansion generator set, the outlet of high-temperature concentrated ammonia water solution of a mixer in an ammonia compression-absorption composite heat pump unit is connected with the hot side inlet of the heat exchanger, and the hot side inlet of a solution heat exchanger in the ammonia compression-absorption composite heat pump unit is connected with the hot side outlet of the heat exchanger. The compressed ammonia steam outlet of the ammonia compression-absorption composite heat pump unit is connected with the cold side inlet of the heat accumulator, and the outlet of preheated dilute ammonia water solution of the ammonia compression-absorption composite heat pump unit and the cold side outlet of the heat accumulator are connected with the hot side inlet of the heat exchanger through the mixer. The system response speed is improved by using the fast response speed of the liquid piston to compensate for the slow start speed of the expander.

The invention belongs to the technical field of isothermal air compression, and discloses a modular liquid piston isothermal air compression system and an operation method thereof.The modular liquid piston isothermal air compression system comprises a cooling water main pump, a heat exchanger, a compression liquid pump, a left compression tank set and a right compression tank set; a left compression tank group liquid outlet valve and a right compression tank group liquid outlet valve are connected and connected to a compression liquid pump, a left compression tank liquid inlet valve and a right compression tank liquid inlet valve are connected and connected to a heat exchanger, and a left compression tank low-pressure gas inlet valve and a right compression tank low-pressure gas inlet valve are connected and connected to a low-pressure gas inlet. The left compression tank high-pressure gas outlet valve and the right compression tank high-pressure gas outlet valve are connected and connected to the high-pressure air outlet, and the operation method adopts the system and comprises two stages which are carried out alternately. Through accurate staggered-phase operation of the multiple pairs of compression tanks, highly stable output of compressed air is achieved, and the output pulsation problem of a traditional liquid piston system is solved.

The paper presents an invention regarding a SPM smart power module, intended for the creation of distributed, safe and efficient energy networks. An elementary module is composed of an innovative Carnot Battery, with high power density, consisting of a heat engine / heat pump whose working agent (gas or vapor) goes through a Carnot / Ericsson / Stirling cycle and which transfers thermal energy between two accumulators with different temperatures. In supply mode, the cycle is run in the direct direction and supplies mechanical / electrical energy, and in charging mode, the heat pump receives energy from the outside (from the network or from renewable sources), and the cycle is run in the opposite direction, transferring thermal energy from the cold reservoir to the hot reservoir. The maximum efficiency of the battery is ensured by at least two isothermalizers, similar to the one described in PCT / R02023 / 050009. Through a system of tanks, heat exchangers, circulation pumps, solenoid valves and pipes, the elementary module can receive a series of extensions, both on the thermal energy capture and distribution side. An intelligent processor collects signals from the SPM system, from a dispatcher, from the Internet, etc, processes them, then sends commands to the motors that actuate the solid pistons of the isothermalizers, the flow regulators of the liquid pistons and of the cooling systems, the solenoid valves, the circulation pumps, in such a way as to ensure the maximum exergetic and economic efficiency of the module, the flattening of load peaks, the maximum safety, the maximum utilization coefficient of all components. Any energy production unit and any consumer can be included in a smart module that ensures the storage, then the supply of the entire energy offers, ensuring consumers a safe, uninterrupted supply.

The invention relates to novel renewable energy that is conceived with chains of liquid pistons. Another solution consists in arranging the reservoirs that contain these liquid pistons at the ends of the spokes of submerged wheels. There are preferably seven such spokes, which makes it possible to permanently have four active reservoirs, two in the descending phase and two in the ascending phase, at reasonable depths below the ten metres of depth of the level of the surface of the liquid pistons from which they are activated. A multi-injector array, referred to as "pan flute", is arranged in a stationary position under the wheels in order to fill the reservoirs when they pass through the lower portion and to ensure that they ascend. Rails are also provided in stationary positions in the upper portions, guiding additional shafts arranged in the upper portions of the reservoirs, making it possible to limit the volume of gas that they contain to what is required for them to descend. The technological difficulties in operating and servicing of the solution are limited to the well-solved difficulties of self-lubricated sealed bearings receiving the shafts of the wheel and the reservoirs. Since the energy required for injecting gas is much lower than the energy produced during the descending and ascending phases, the solution provides a highly favourable energy balance; electric power plants consisting of around fifteen of these wheels can achieve electric power that allows them to rival nuclear reactors.

A medical device for delivering a liquid to an electrosurgical instrument. A plunger is movably disposed and biased within a fluid reservoir. The plunger includes a first colored portion and a second colored portion. The first colored portion is viewable through the window with the fluid reservoir containing a first volume, and movement of the plunger is configured to expose the second colored portion as the fluid reservoir discharges liquid. A housing of the device may include a first shell including a female snap and a second shell including a male snap. The female snap includes a female annular projection, a female snap undercut, and a central locking feature. The central locking feature is received within a male annular projection to extend from the first shell to an axial position closer to a distal end of the female annular projection than the female snap undercut.

The application discloses a kind of heat pump energy storage systems and methods coupled liquid piston, including sequentially connected energy storage compressor, hot storage tank, first heat exchanger, first double-tank liquid piston, second heat exchanger, energy storage expander, cold storage tank and third heat exchanger;Third heat exchanger connects energy storage compressor;It further includes sequentially connected cold storage tank, energy release compressor, first buffer heat exchanger, hot storage tank, energy release expander, second buffer heat exchanger, second double-tank liquid piston and fourth heat exchanger, and the outlet of fourth heat exchanger is connected to cold storage tank;First double-tank liquid piston and second double-tank liquid piston are the same structure;Further compression is carried out to hot storage tank outlet normal temperature high pressure gas using liquid piston, the expansion ratio of energy storage expander is improved, the outlet temperature of energy storage expander is reduced, not only the quality of cold storage tank storage cold energy is improved, but also the round trip efficiency of system is improved, by compressing the gas at the outlet of energy release expander, the expansion ratio of energy release expander can be improved.

The application discloses a double-shell near-isothermal compressed air energy storage system coupled with solar energy and an operation method thereof. The system combines the advantages of compressed air energy storage, an ejector, a double-tank liquid piston, a heat accumulator and solar light heat, uses the exhaust heat after energy release, the solar light heat stored in the gap between energy storage and energy release and the heat accumulator heat after energy release to heat air as insulation gas to insulate air in the double-shell air storage tank, reasonably uses the exhaust heat after energy release, realizes step-by-step utilization of energy, reasonably uses the heat stored in the gap between energy storage and energy release and the heat accumulator, reduces heat loss of the heat accumulator during the period, improves the output stability of the system in the later energy release stage and the insufficient light period, reduces the cost of the air storage chamber, solves the problems of the exhaust heat in the existing compressed air energy storage system, the economy of the air storage chamber, the heat loss in the air storage process in the air storage chamber, the energy storage density and the low density of the compressed air energy storage system.

This application discloses an anti-backflow atomizing nozzle and a diffuser device, relating to the field of aromatherapy equipment. The anti-backflow atomizing nozzle includes a nozzle body and a piston. The nozzle body has a gas channel and a liquid channel. The gas channel includes an air inlet and a first air outlet, and the liquid channel includes a liquid inlet and a liquid outlet. The first air outlet outputs flowing gas to create a negative pressure at the liquid outlet and atomize the liquid output from the liquid outlet. The piston is slidably and sealingly installed in a piston chamber. When the anti-backflow atomizing nozzle is in a first state, the piston disconnects the connection between the first air outlet and the liquid outlet. When the anti-backflow atomizing nozzle is in a second state, the piston moves under the action of flowing gas output from the second air outlet, connecting the first air outlet and the liquid outlet. The anti-backflow atomizing nozzle provided by this application can prevent volatile essential oils from entering the air pump when not in operation.

The invention relates to a method for compressing and / or expanding a gas by means of a liquid piston device comprising: at least two cylinders (10, 10 '); a liquid line (21) interconnecting the cylinders (10, 10 '); a liquid drive unit (20) by means of which a fluid (14) can be conveyed from one cylinder (10, 10 ') to the other cylinder (10, 10'); a low-pressure gas reservoir (40) connected to each cylinder (10, 10 ') via a low-pressure line (41); low-pressure valves (11, 11 ') for the respective cylinders (10, 10'), by means of which low-pressure lines (41) leading to the cylinders (10, 10 ') can be opened and closed; a high-pressure gas reservoir (50) connected to each cylinder (10, 10 ') via a high-pressure line (51); and high-pressure valves (12, 12 ') for the respective cylinders (10, 10'), by means of which high-pressure lines (51) leading to the cylinders (10, 10 ') can be opened and closed.

The grouped mechanical liquid piston heat pump (1) comprises a blind liquid cylinder (8) of compressors in which a double-acting hydraulic piston (10) of compressors translates to form a first and a second compressor hydraulic variable volume (12, 134), and a blind liquid cylinder (30) of expanders in which a double-acting hydraulic piston (39) of expanders translates to form a first and a second expander hydraulic variable volume (44, 46), said hydraulic variable volumes (12, 134, 44, 46) communicating with compressor and expander gas and liquid reservoirs (14, 29, 50, 55) in which compressor and expander heat exchange and accumulation means (16, 59, 139, 70) are housed, this to form a compressor (3) and an expander (4).

The utility model provides a quantitative medicament adding device for a water treatment pond, which relates to the technical field of water treatment and comprises a liquid storage tank, a stirring tank is arranged at the bottom of the liquid storage tank, and a quantitative medicament adding mechanism is arranged between the liquid storage tank and the stirring tank; on the basis that the air cylinder pushes the liquid pushing piston back and forth to achieve quantitative adding of chemicals, the long rod is rotated to drive the lead screw to rotate so that the liquid baffle can be controlled to be close to or away from the liquid pushing piston, and the volume between the liquid pushing piston and the liquid baffle is changed; the maximum quantitative suction amount and the minimum quantitative suction amount can be adjusted according to requirements, the application range of the device is effectively widened, meanwhile, the two liquid level sensors can serve as limiting switches, the water level change of the liquid storage tank can be monitored in real time by observing the height of the floating plate, and the safety of the device is improved. The problem of overflow caused by too much medicament or medicament adding difficulty caused by too little medicament is avoided, the automatic monitoring of the water level in the liquid storage tank is realized, and the normalization of quantitative medicament adding is ensured.

The invention relates to a heat pump with grouped mechanical-liquid pistons (1) comprising a compressor blind liquid cylinder (8) in which a compressor double-acting hydraulic piston (10) moves in translation so as to form first and second compressor variable hydraulic volumes (12, 134), and a pressure reducer blind liquid cylinder (30) in which a pressure reducer double-acting hydraulic piston (39) moves in translation so as to form first and second pressure reducer variable hydraulic volumes (44, 46), the variable hydraulic volumes (12, 134, 44, 46) being in communication with compressor and pressure reducer gas and liquid tanks (14, 29, 50, 55) in which compressor and pressure reducer heat exchange and heat storage means (16, 59, 139, 70) are housed, so as to form a compressor (3) and a pressure reducer (4).

A device for isothermal expansion and compression of a gas, ensuring the compression of the gas by consuming mechanical energy and the restitution of the mechanical energy by the expansion of the gas. The device includes at least two liquid pistons movable in at least two chambers each including a gas that is able to be compressed or expanded by movement of the liquid pistons. A mechanical actuator, including at least one solid piston, ensures the movement of the liquid pistons in the chambers. Each chamber includes an insert, through which the liquid and the gas can circulate, the insert including through-cells, which extend in a direction parallel to the direction of movement of the liquid piston in the insert. The device includes at least one first phase separator connected to an outlet of each of the chambers, and to a tank for storing pressurized gas.

This invention discloses a compressed gas energy storage system and method that couples an electrolysis device and a fuel cell. The system includes a water electrolysis device, with its hydrogen and oxygen outlets connected to a hydrogen compressor unit and an oxygen compressor unit, respectively. Both the hydrogen and oxygen compressor units are sequentially connected to a liquid piston near-isothermal expansion module, an expander, and a hydrogen-oxygen fuel cell, which is connected to the water electrolysis device. Both the hydrogen and oxygen compressor units are equipped with heat exchangers and heat accumulators. The hot side of the heat exchanger is connected to the compressor, and the cold side inlet is connected to a cold water source, while the outlet is connected to the liquid piston near-isothermal expansion module. A heat exchanger is also provided at the expander outlet, with its cold side connected to the expander and the hydrogen-oxygen fuel cell, and its hot side connected to the hydrogen-oxygen fuel cell and a water tank. This system couples the water electrolysis fuel cell system with a compressed hydrogen and oxygen system, fully utilizing the waste heat from water electrolysis and fuel cell products, thus achieving cascaded energy utilization.

The application relates to the technical field of coal mining and gas control, and discloses an underground gas-liquid-solid three-phase cooperative fracturing method and system, wherein the method comprises the following steps: starting a water sand pump group to output a water sand mixed liquid; exciting a high-energy gas generator to generate a high-pressure gas pulse, so as to force a water way one-way valve to be closed; driving a water sand mixed liquid column in a fracturing pipe column to accelerate into a coal seam crack, and transporting a proppant to a deep part of the coal seam crack; when the pressure at the end of the fracturing pipe column is less than the fluid pressure in the coal seam crack, an orifice one-way valve is closed under the action of a pressure difference; the pressure in a three-way current collector continues to decrease to be less than the output pressure of the water sand pump group, and the water way one-way valve is opened under the action of a pressure difference. Through the gas-driven liquid piston effect and fluid diode control, the proppant is transported to the deep part of the crack, and automatic pressure maintaining and locking after operation are realized, backflow and sand spitting are effectively prevented, and the long-term permeability improvement effect of coal seam fracturing is improved.

To provide a foamer pump that can suppress liquid contact with a spring.SOLUTION: A foamer pump 2 comprises: an air cylinder 2a held radially outward of an opening 3a of a container body 3 by being mounted on an outer peripheral surface of the opening 3a; a liquid cylinder 2b held radially inward of the opening 3a of the air cylinder 2a by being mounted on the opening 3a; an air piston 2c1; a liquid piston 2d; an air chamber 2e; a liquid chamber 2f; a lifting section 2g that lifts and lowers with the air piston 2c1 and the liquid piston 2d; and a spring 2h that generates a biasing force to raise the lifting section 2g. By lifting and lowering the lifting section 2g, content liquid 4 pressurized and fed through the liquid chamber 2f from inside the container body 3 and air pressurized and fed from the air chamber 2e are mixed to become foamy and discharged.SELECTED DRAWING: Figure 1

The mechanical liquid piston low-speed expansion compressor (1) includes a liquid cylinder (8) through which a hydraulic piston (10) is translated, pivoting around an inclined shaft (9). The hydraulic piston (10) is firmly fixed to a connecting rod (11) connected to the crank (26) of a crankshaft (24). The axis of rotation of the crankshaft (24) is parallel to the inclined shaft (9). Meanwhile, a piston guide means (23) keeps the connecting rod (11) and the hydraulic piston (10) parallel to the liquid cylinder (8). These connecting rod (11) and hydraulic piston (10) form a variable hydraulic volume (12) filled with working fluid (13) that communicates with a gas and liquid reservoir (14) containing a heat exchange and storage means (16). The reservoir (14) and the liquid (13) form a variable pneumatic volume (2) through which a working gas (5) is compressed or expanded.

The utility model discloses a kind of drip-proof foam pumps, it is related to foam pump technical field, to solve the problem of traditional foam pump inversion, horizontal use liquid leakage, leading to product waste, equipment corrosion and security risk.It includes the pump body of the pump cavity being arranged inside, hollow piston rod, annular liquid piston and duckbill valve;Piston rod is arranged in pump cavity, and liquid delivery channel is formed inside, lower end outer periphery is equipped with liquid inlet, upper end portion is equipped with liquid outlet, three are sequentially conducted;Liquid piston is sleeved in the lower end of piston rod, and the inner wall of pump cavity is sealed to separate liquid chamber and air chamber, when not liquid, liquid inlet is blocked, when liquid, liquid inlet is vertically misaligned and conducted;Duckbill valve is arranged in the middle part of piston rod channel, one-way conduction and need to be opened only when negative pressure higher than the gravity pressure of liquid column in channel is generated.The utility model has good leak-proof effect, compact structure, is suitable for hospital and other scenes and inverted container, and the transformation cost is low.