728 results about "Injection pump" patented technology

The invention discloses a blowout preventer remote automatic grease injection system based on PID control and a control method, and relates to the technical field of grease injection, and the control method comprises the following steps: an initialization stage: automatically matching the specification of a choke tube according to the diameter of a cable, and preheating sealing grease to a set temperature; in the dynamic control stage, wellhead pressure and grease injection pressure are monitored in real time, pressure errors are calculated, the flow of a grease injection pump is adjusted according to a PID algorithm, and when the cable lowering speed suddenly changes, pressure fluctuation is inhibited in advance through a differential link; and according to the safety redundancy mechanism, when the main PID controller fails, the standby PID controller is automatically switched, and emergency locking is triggered when the wellhead pressure exceeds the limit. The flow of a grease injection pump is adjusted in real time through an incremental PID algorithm and a self-adaptive adjustment method, the grease injection amount is accurately controlled, pressure fluctuation is reduced, sudden change of the cable lowering speed is predicted through a differential link, the response precision is improved, stable operation of the system is ensured through a redundant controller and an emergency locking function, PID output is corrected through a dynamic temperature-viscosity model, and the reliability of the system is improved. The system service life is prolonged.

The present application relates to a method and system for filling water in a primary loop after overhaul charging of a nuclear power unit, comprising: performing preparation work before filling water; after the preparation work is completed, performing switch operation test of a to-be-tested actuator and water filling and exhaust work of a flowmeter; after the switch operation test of the to-be-tested actuator is completed, performing performance test of a high-pressure safety injection pump; after the performance test of the high-pressure safety injection pump is completed, performing performance test of a low-pressure safety injection pump; after the performance test of the low-pressure safety injection pump is completed, filling water in the primary loop according to a preset water filling mode; judging whether a real-time water level of a reactor pool reaches a full water level; if yes, performing alarm action test. The present application can solve the problem of long time consumption, reduce workload, significantly improve work efficiency, reduce work risk and effectively save production cost by completing the preparation work in advance and arranging the alarm action test at the end.

A bleed system including a jet pump system configured to provide a supply gas comprising at least one of a higher pressure gas, a lower pressure gas, or a mixture of the higher pressure gas and the lower pressure gas. A needle body defines a throat region between a nozzle wall and the needle body. The needle body is configured to cause a gap between a rear needle surface of the needle body and the nozzle wall to decrease as the rear needle surface extends toward the throat region. The jet pump system is configured to discharge the higher pressure gas through the throat region and mix the higher pressure gas and the lower pressure gas in a mixing portion of an exhaust portion.

The invention relates to the technical field of injection pump calibration, in particular to an injection pump automatic calibration method and system based on flow velocity stability, and the method comprises the following steps: S1, collecting flow velocity data in the operation process of an injection pump, and recognizing a boundary section of stable-to-unstable conversion based on a dynamic window; constructing a boundary drift indication map reflecting response delay, amplitude fluctuation and a rate inflection point; s2, identifying a consistency offset error mode from the atlas in combination with a multi-cycle drift behavior, marking a start window, a transfer window and a peak window, and generating a historical drift memory sequence; and S3, constructing a cross-cycle inheritance type calibration parameter template based on the memory sequence, and adaptively adjusting key parameters in input control logic to realize pre-calibration response before the injection pump is unstable. According to the method, by constructing the boundary drift map, the inheritance type calibration template and the dynamic parameter fusion mechanism, accurate pre-adjustment calibration and self-adaptive compensation optimization of the injection pump before the injection pump is in the unstable state are achieved.

The invention relates to the technical field of part stamping dies, in particular to an automobile part machining stamping forming die which comprises a mounting plate, a fixed supporting structure is arranged below the mounting plate, a first mounting block is fixedly mounted on the upper side of the mounting plate, and a detachable lower die base is arranged on the upper side of the first mounting block. In the process that a sliding block moves downwards along with a movable adaptive block, the top face of the sliding block retracts into a first sliding cavity, space is reserved for stamping, when stamping is completed and an upper die block ascends, a second spring pushes the movable adaptive block to move upwards, the top of the sliding block protrudes out of the surface of a lower die base to eject a workpiece, and the top of the sliding block makes contact with an extrusion sensor to trigger an automatic oil injection pump; lubricating oil is injected into the oil injection hole through the guide pipe and sprayed to the surface of the lower die base through the oil injection groove to complete lubrication of the lower surface, the bidirectional lubrication mechanism ensures that the metal sheet is comprehensively lubricated in the stamping process, friction loss is remarkably reduced, and the product surface quality is improved.

The invention discloses a high / ultra-high performance concrete full-automatic injection pump truck and a construction method, the high / ultra-high performance concrete full-automatic injection pump truck comprises a walking system, an efficient pumping and precise injection system, a hydraulic and intelligent central control system, a pre-injection pre-scanning system, a spraying-while-detecting system and a post-injection quality evaluation system, and the walking system is used for achieving movement and in-place of a pump truck; the efficient pumping and accurate spraying system is used for conveying and spraying concrete; the hydraulic and intelligent central control system is used for controlling the operation of the whole pump truck; the pre-spraying pre-scanning system is used for acquiring the three-dimensional form and defect information of a construction surface before construction; the spraying-while-detecting system is used for monitoring the concrete flow state and construction parameters in the spraying process in real time; the post-spraying quality evaluation system is used for carrying out nondestructive testing on the quality of a spraying layer after construction; according to the invention, full-process intelligent closed-loop control from construction surface scanning, path planning, real-time spraying adjustment to final quality evaluation is realized, and high quality, high efficiency and intelligence of concrete spraying construction are realized.

The invention discloses an energy-saving double-jet-pump steam stripping system which comprises a device body, an annular rotating seat is arranged at the top of the device body, a plurality of vertical rods are connected to the bottom of the annular rotating seat, a plurality of first flow guide discs are fixedly connected among the vertical rods, annular material accumulation discs are arranged at the bottoms of the first flow guide discs, and a plugging disc is arranged in the annular rotating seat. A guide air pipe is fixedly arranged above the plugging disc, an air supply pipe is movably arranged on the plugging disc in a penetrating mode, the top of the air supply pipe is movably arranged in the guide air pipe in a penetrating mode, a lifting device is arranged on the plugging disc, a plurality of second flow guide discs are fixedly connected to the air supply pipe, and every two first flow guide discs and every two second flow guide discs form a group; the upper openings of the second flow guide discs in the same group are located above the lower openings of the first flow guide discs, and the second flow guide discs are provided with material splashing blocks extending into the annular material accumulation discs. The steam stripping system can fully improve the steam stripping efficiency on the premise of avoiding flooding.

The invention relates to an anti-explosion electric injection pump, and belongs to the technical field of electric injection pumps, the anti-explosion electric injection pump comprises a movable base, an anti-explosion electric control box is arranged on the outer wall of the movable base, a hydraulic pump is arranged on one side of the anti-explosion electric control box, an anti-explosion motor is arranged on one side of the hydraulic pump, and an oil tank body is arranged on one side of the anti-explosion motor; a grease injection gun body connected with the hydraulic pump through a gas conveying pipe is arranged on one side of the oil tank body, an end cover tightening detection rod is arranged on the outer wall of the grease injection gun body, an oil outlet pipe is arranged at the top of the grease injection gun body, and a pressure gauge is arranged on the outer wall of the oil outlet pipe. A double-piston pressurization structure in the grease injection gun body is arranged, a piston assembly in the grease injection gun body is improved, the double-piston series connection design is adopted, high-pressure oil output by the hydraulic pump firstly pushes the first piston, then a linkage structure drives the second piston to conduct secondary pressurization, the grease injection pressure is remarkably improved, and the high-pressure grease injection working condition requirement is met; and the double pistons work cooperatively, so that the grease injection flow is more stable.

The invention relates to a jet pump (2) for supplying hydrogen in a fuel cell system, comprising a nozzle device (10) and a needle (30) adjustably guided in a bearing bore (13) of the nozzle device (10) for changing an outlet cross-section relative to the nozzle device (10). To ensure long-term, reliable operation of the jet pump (2), the nozzle device (10) has a recess (24) extending along the needle (30) on the bearing bore (13) and / or a recess (25) extending along the needle (30) next to the bearing bore (13). The invention further relates to a bearing for the needle (11) for a jet pump (2).

The utility model belongs to the technical field of dosing devices, and particularly discloses a grating type high-precision injection pump which comprises a base plate, an injector fixing piece connected to the base plate, an injector installed on the injector fixing piece, a connecting piece, a controller, a grating ruler and an installation table connected to the base plate in parallel, a sliding plate is horizontally and slidably connected to the grating ruler, a sliding table is horizontally and slidably connected to the mounting table, the connecting piece is connected with the sliding plate and the sliding table, and a driving piece for driving the sliding table to slide is arranged on the mounting table; the tail end of a push rod of the injector is fixed on the connecting piece; a photoelectric sensing switch is connected to the base plate, a sensing piece is connected to one side of the connecting piece, the controller is electrically connected with the driving piece and the photoelectric sensing switch, and when the sensing piece moves to the photoelectric sensing switch and triggers the photoelectric sensing switch, the controller controls the sliding table to stop sliding, and at the moment, a push rod of the injector is pushed to the bottom of a needle cylinder of the injector. The sampling accuracy of the injection pump can be improved.

The utility model relates to torsion testing equipment of a matching device of a liquid injection pump for a microfluidic system, which comprises a machine table, a torsion testing machine is arranged on the table top of the machine table, the torsion testing machine comprises an output end used for being connected with a screw rod of the matching device in a matched mode, and the axial direction of the output end is in a first direction X; the jig comprises a base and a sliding seat, the base is fixed to the table top, the sliding seat can be assembled on the base in a sliding mode in the second direction Y, the sliding seat is used for containing a matched device, and the second direction Y is perpendicular to the first direction X; an output part of the driving mechanism is connected with the sliding seat, and the driving mechanism is used for driving the sliding seat to slide relative to the base in the second direction Y; the propelling mechanism is connected with the torsion testing machine and is used for driving the torsion testing machine to move along the first direction X; the torsion testing equipment further comprises a control system used for controlling the torsion testing machine, the driving mechanism and the propelling mechanism to work, the testing efficiency can be improved, and the accuracy of the final position of the piston rod can be guaranteed.

A fuel-fired burner includes a combustion air inlet for receiving combustion air coupled to a combustion air nozzle at an input to a second chamber within a burner housing spaced apart from a third chamber within the second chamber. The combustion air nozzle directs the combustion air into the third chamber. A fuel inlet coupled to a burner nozzle secured to a burner mounting plate has a recycle port for receiving hot exhaust gas provided to an exhaust gas path. A jet pump located entirely inside the burner housing is configured to receive the hot exhaust gas from the exhaust gas path. The jet pump operates by flowing the combustion air through the combustion air nozzle which suctions in the hot exhaust gas through the recycle port into the exhaust gas path then into a gas mixing zone for mixing the hot exhaust gas and the combustion air.

The utility model discloses a device for removing burrs on the inner wall of an injection pump, which belongs to the field of injection pump processing and comprises a working table, a lifting component is arranged at the top of the working table and comprises a cross beam, a burr removing mechanism is arranged on the cross beam and comprises a turntable, and a groove is formed in the bottom of the turntable. The groove is internally and fixedly connected with an electric push rod, the other end of the electric push rod is fixedly connected with a moving block, the moving block is slidably connected into the groove, the moving block is internally and rotatably connected with a rotating shaft, the bottom of the rotating shaft is fixedly connected with a grinding roller, the burr removing mechanism further comprises a power assembly, and a driving mechanism is arranged above the rotating disc. The device has the beneficial effects that the positions of a moving block and a grinding roller are adjusted through an electric push rod, and the device is suitable for injection pumps of different sizes; rotation of the rotating shaft serves as a power source to drive the grinding roller to rotate, one machine has multiple purposes, and the resource utilization rate is increased. And the autorotation direction of the polishing roller is opposite to the revolution direction, so that the polishing efficiency is improved.

The invention discloses an integrated on-site synchronous grouting device and method for a shield tunneling machine. The integrated on-site synchronous grouting device for the shield tunneling machine comprises material storage equipment, pulping equipment, injection equipment, grouting equipment and a grouting monitoring-feedback-decision system. The material storage equipment comprises a horizontal tank type stock bin and a sealed tank; the injection equipment comprises an injection pump, a pressure feed pipe and a compressor, and is powered by the compressor; the pulping equipment comprises a liquid A mixer and a liquid A stirrer; the grouting equipment comprises a propelling valve, a cleaning pipeline, a material mixing device, a grouting pipeline and grouting control equipment. The monitoring-feedback-decision-making system comprises a monitoring system, a feedback system and a decision-making system and is connected with a grouting process line. The integrated field synchronous grouting equipment integrating slurry preparation, slurry storage and grouting is formed in the shield tunneling machine, the problems that a traditional ground stirring station is unstable in long-distance slurry pumping, high in cost and the like are solved, the slurry quality can be guaranteed, and the grouting effect can be improved.

The utility model discloses a shock absorber magnetorheological fluid high pressure variable pressure and flow injection mechanism which comprises a mechanism body, a buffer cylinder and a quantitative cylinder are installed on the side of the upper end of the mechanism body, a servo motor is installed in the middle of the upper end of the mechanism body in a positioning mode, and a sliding rail is installed at the front end of the lower portion of the mechanism body. According to the magnetorheological fluid high-pressure variable pressure and flow injection mechanism of the shock absorber, after the liquid injection pump set supplies liquid into the buffer cylinder, a pipeline is sealed through the one-way valve to prevent the liquid from flowing back until the buffer cylinder is full, and the two-way pneumatic control ball valve on the top of the buffer cylinder is opened; the servo mechanism pulls a piston rod in the liquid injection quantitative cylinder to fully travel to synchronously fully fill a cavity in the quantitative cylinder, excess air is exhausted through an exhaust valve at an oil inlet and an oil outlet of the quantitative cylinder, and the pressure required for liquid injection in a pipeline is finely adjusted and kept through a servo motor; and then the servo motor drives the quantitative cylinder to inject the magnetorheological fluid with the required volume into the product according to the set oil injection amount.

The invention relates to a jet pump (100) for conveying a suction fluid (242) in a refrigerant circuit (200) of a temperature control system using a propellant fluid (231) and utilizing the Bernoulli effect, wherein the jet pump (100) has a primary nozzle (103) for accelerating the propellant fluid, a secondary connection interface (102) for supplying the suction fluid, a mixing tube (104) downstream of the primary nozzle (103) and downstream of the secondary connection interface (102), and a diffuser (105) downstream of the mixing tube (104), wherein in an end section (140) of the mixing tube (104), which is located at an end of the mixing tube (104) furthest from the primary nozzle (103) and closer to the diffuser (105), a thrust edge (130) is provided which is configured to act in a supersonic The flow in the mixing tube (104) is intended to trigger a compression pulse in the final section (140). Furthermore, a refrigerant circuit (200) with such a jet pump (100) is proposed.

The invention relates to an underground oil-water separation multi-layer injection-production process pipe column with step-by-step setting and seal examining functions. The problems that an existing injection-production pipe column in the same well cannot be subjected to seal examination after setting, and effective setting cannot be achieved when the number of separation layers is large are mainly solved. The device is characterized in that the lower end of the extraction pump (12) is connected with a pipe column, the pipe column is connected with a plurality of delayed setting packers, the number of the delayed setting packers is the same as that of injection layers, the lower end of the pipe column is connected with an anchoring packer (6), and the water injection layer and the extraction layer are separated by the delayed setting packers and the anchoring packer (6); the injection pump (4) is located below the anchoring packer (6), and the oil-water separator (2) is arranged on the lower portion of the injection pump (4). In the construction process of the underground oil-water separation multi-layer injection-production process pipe column with the step-by-step setting and seal examining functions, step-by-step setting and seal examining can be achieved on the packing pipe column according to process requirements, and it is guaranteed that the injection-production process of the same well is reliably achieved.

The invention relates to the technical field of ferrous metallurgy casting, in particular to a drainage sand removing and recycling method and device. Comprising a mechanical arm, a lifting rotation controller, a controller arm, a sand suction cylinder, a sand conveying pipeline, a sand collecting tank and an injection pump. The lifting and rotating controller is fixedly mounted on the mechanical arm; the controller arm is connected with the lifting and rotating controller, and the lifting and rotating of the controller arm are controlled by the lifting and rotating controller; the sand suction cylinder is connected with the controller arm, the sand suction cylinder is of a U-shaped structure, and one end of the sand suction cylinder is a horn mouth used for sucking drainage sand; one end of the sand conveying pipeline is positioned above the tundish cover sprue gate, and the end part of the sand conveying pipeline is bent downwards to be connected with the other end of the sand suction cylinder; the other end of the sand conveying pipeline is connected with the sand collecting tank; the sand collecting tank is connected with an injection pump pipeline, and the injection pump provides suction power. The ladle filler sand, harmful gas in gaps of the ladle filler sand and a long nozzle and a small part of molten steel in contact with the ladle filler sand in a steel ladle can be discharged out of tundish molten steel and recycled.

The invention discloses a high-pressure gas supply system with a combined high-pressure injection reliquefaction function, which belongs to the technical field of high-pressure gas supply and reliquefaction of ships and comprises a high-pressure gas supply system and a high-pressure injection reliquefaction system sharing a high-pressure compressor unit with the high-pressure gas supply system. The high-pressure gas supply system compresses and cools fuel cabin evaporation gas through a high-pressure compressor unit and then conveys the fuel cabin evaporation gas to the main machine through a high-pressure gas supply pipeline to supply energy to the main machine. The high-pressure injection reliquefaction system injects part of boil-off gas compressed by the high-pressure compressor unit into a condensation tank by means of an injection pump, the boil-off gas in the tank is condensed into liquid fuel to be conveyed back to a fuel cabin, and the uncondensed boil-off gas enters the high-pressure compressor unit again through a pipeline to be compressed and is conveyed into the condensation tank again through the injection pump to be liquefied. By sharing the high-pressure compressor unit, single equipment has the functions of high-pressure gas supply and reliquefaction, stable energy supply of a main engine is guaranteed, meanwhile, boil-off gas is recycled, the depressurization requirement and storage safety of a fuel cabin are met, the pipeline complexity and space occupation are reduced, and the cost is reduced.

Devices and methods for operating a diaphragm compressor. Embodiments of the present disclosure comprise an oil piston being driven to pressurize work oil against the diaphragm of the compressor. In embodiments, an injection pump provides a supplemental flow of work oil in the region of pressurized fluid, and such pump may be part of an actively controlled system. In embodiments, a pressure relief valve vents an overpump flow of work oil, and such valve may be variable. Embodiments provide feedback and control mechanisms, including control of the injection pump and the relief valve.

The invention relates to the technical field of gluing pumps, and discloses a liquid silica gel injection machine and a using method, the injection machine comprises a base, a lifting rod, a hydraulic rod, a pressure plate, a connecting pipe, a three-way valve, a stirring part, a cleaning and scraping part and a squeezing and spraying part. A stirring part downwards pushes a trigger switch through a T-shaped ring, an electric rod is automatically started to push a motor and a glue stirring piece to extend into a glue barrel, a stirring plate and a glue disc rotate to stir liquid silica gel, and layering and local curing are prevented; the cleaning and scraping part is quickly inserted into a supporting rod through an inserting rod, a T-shaped ring is rotated to drive a rotating sleeve to rotate with a flange as the circle center, and a cotton brush and a scraping plate rotationally clean a pressing disc and the flange; and the extrusion spraying part extrudes the corrugated bag to enable the sol agent to be sprayed to a cleaning surface through the guide channel and the liquid channel, and cooperates with mechanical scraping for cooperative cleaning. The cleaning efficiency is improved, the residual silica gel rate is reduced, the equipment maintenance time is shortened, and the injection quality and the production efficiency are remarkably improved.

This invention discloses a microfluidic injection pump, comprising: a base, a transmission mechanism, and a universal fixing mechanism; a touch screen is mounted on the base for controlling the use of the microfluidic injection pump; the transmission mechanism includes a drive component and an injection pusher, the injection pusher being mounted on the drive component, and the drive component driving the injection pusher to move horizontally, thus moving the syringe piston rod; the universal fixing mechanism includes an upper positioning seat and a lower positioning seat. This invention can securely fix syringes of any size and shape without causing any damage or deformation, effectively avoiding reduced accuracy of the microfluidic injection pump due to syringe shaking or damage / deformation. Furthermore, it can automatically fix multiple sets of syringes of different sizes and shapes without requiring excessive manual operation, saving time and effort and improving the efficiency of the microfluidic injection pump.

The invention relates to the technical field of high-pressure tank liquid injection control, and discloses a high-pressure tank liquid injection process control method and system, and the method comprises the steps: setting control parameters: micro-injection and standing balance duration, a pressure reference value, an upper limit and a rate threshold; starting an injection pump and a liquid inlet valve, and entering a micro-injection stage; stopping the injection pump and closing the valve, and entering a feeding balance and pressure management stage; whether the accumulated injection amount reaches the total injection amount target or not is judged, and injection is repeatedly executed or stopped; continuously monitoring the pressure in the tank, and triggering an emergency shutdown program when the pressure in the tank reaches the upper limit of the pressure in the tank or the rapid rising speed threshold of the pressure; according to the method, through staged control (including a micro-injection stage and a standing balance stage) and multi-parameter monitoring, the problems of pressure abrupt increase misjudgment and injection interruption caused by temperature difference and dissolved gas precipitation in the prior art are effectively solved.

The utility model discloses a multi-cylinder diesel oil injection pump oil mass control sleeve assembly assistive device which comprises a base, at least two oil mass control sleeve installation openings are formed in the front face of the base at intervals along a straight line, and an open structure communicated with the oil mass control sleeve installation openings is formed in the back face of the base. The pressing assembly comprises a pressing plate detachably installed on the back face of the base through a fastener and a rubber pressure transmitting plate clamped between the pressing plate and the base. The step positioning module is composed of a plurality of positioning bodies which are sequentially embedded in the oil mass control sleeve installation openings, and the axial heights of the positioning bodies are arranged in an equal difference progressive increase mode from one end to the other end; the toothed bar positioning mechanism comprises a toothed bar positioning plate which is vertically and fixedly arranged on the side edge of the mounting opening where the highest positioning body is located, and a toothed bar positioning pin which is detachably inserted into the positioning groove and is connected with the toothed bar in a matched mode is arranged at the top of the toothed bar positioning plate. The assembly assistive device has remarkable advantages in the aspects of press fitting, positioning, benchmark providing and the like, the assembly efficiency, precision and yield are improved, the service life is prolonged, and the practicability is high.

The invention relates to a conveyor assembly (3) for an anode circuit (9) of a fuel cell system (1) for conveying a gaseous medium, in particular hydrogen, from an anode region (38) of a fuel cell (2), wherein the conveyor assembly (3) comprises at least one recirculation blower (8), wherein the conveyor assembly (3) is at least indirectly fluidically connected to an outlet of the anode region (38) by means of at least one connecting line (23), and wherein the conveyor assembly (3) is fluidically connected to an inlet of the anode region (38) by means of a further connecting line (25). According to the invention, the conveyor assembly (3) has, in addition to the recirculation blower (8), a jet pump (4), a metering valve (6) and a separator (10) as further components, wherein the components (4, 6, 8, 10) are arranged at least almost completely in a common housing (7) for the flow profile of the gaseous medium.

1. The name of this design product: Jet pump head (TJSW / 6M). 2. Purpose of this design product: This design product is used for pumps. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the key points of the design: main view.

The utility model provides a patrol turntable for an injection pump. The injection pump inspection turntable comprises a mounting shell; the mounting shaft is fixedly connected to the position, located in the middle, of the back face of the inner wall of the mounting shell, a marking disc is mounted at the position, located on the back face, of the outer surface of the mounting shaft, and a triangular indicator is mounted at the position, located on the top, of one end of the front face of the marking disc; a timing disc is rotationally connected to the outer surface, close to the middle, of the mounting shaft through a second bearing, a circle of time blocks are arranged on the front face of the timing disc, and a liquid measuring disc is rotationally connected to the end, close to the front face, of the outer surface of the mounting shaft through a first bearing. According to the inspection turntable for the injection pump, inspection can be well documented through the structure, the inspection is ensured to be implemented, the position of an injector push cylinder is visually recorded and abnormal operation is quickly identified during each inspection, and related use systems of the injection pump are well documented and well documented, so that the use safety of the injection pump is improved.

The invention provides a micro injection pump and a control method. The micro injection pump and the control method are used for at least solving the technical problem of digital input in the prior art. A micro injection pump comprises a control chip, a first digital key and a second digital key, the first digital key transmits a first signal to the control chip after being triggered, the second digital key transmits a second signal to the control chip after being triggered, and the first digital key and the second digital key are triggered for a plurality of times in turn in a certain time. Or the same number key is triggered at least once within a certain time, at least eight combined signals can be transmitted to the control chip, and in a first operation interface of the micro injection pump, the first signal, the second signal and the remaining eight combined signals respectively and correspondingly input numbers to the system. On the premise that the number of the keys is not changed, the direction keys are replaced by the number keys, so that the number input efficiency is higher.

The application discloses a kind of spray pump structures with multi-hole parallel nozzle, including connecting pipe flange, shell, nozzle, flow guide cylinder, ejector, flow guide cylinder is fixedly connected outside nozzle, nozzle and flow guide cylinder have annular area between;Nozzle rear end is fixedly connected in the bottom of connecting pipe flange, nozzle is multi-hole parallel nozzle, with one working steam inlet and four working steam outlets;Flow guide cylinder is a hollow cylinder structure, and a circle of through-flow holes are arranged outside it.The spray pump structure of the application is improved on the technology of existing tapered nozzle, and adopts the design structure of multi-hole parallel nozzle.Under the condition that the outlet throat area is unchanged, the mixing of nozzle outlet jet and the sucked gas is enhanced, and the pumping capacity of the tapered nozzle ejector is improved.