480 results about "Injection pump" patented technology

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.

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 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 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.

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 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.

The utility model discloses an experimental device for evaluating the influence of oil well production pressure difference on the stability of oil-water emulsion, which is characterized in that an outlet of a produced water temperature-resistant and pressure-resistant container is connected with an inlet of a trace water injection pump, and an outlet of a produced oil temperature-resistant and pressure-resistant container is connected with an inlet of a trace oil injection pump; outlets of the micro water injection pump and the micro oil injection pump are respectively connected with two inlets of the three-way valve, an outlet of the three-way valve is connected with a liquid phase inlet of the high-pressure emulsification tank, and a liquid outlet of the high-pressure emulsification tank is connected with an inlet of the storage type temperature-resistant and pressure-resistant container; an outlet of the storage type temperature-resistant and pressure-resistant container is connected with an oil pipe inlet of the small-sized double-wing well head device through a one-way pressure regulating valve, an oil nozzle sleeve outlet of the small-sized double-wing well head device is connected with a short pipe, and an outlet of the short pipe is inserted into a center hole of a large-end end cover of the transparent receiving cover. The side wall of the transparent receiving cover is provided with a transparent observation window and a high-speed camera. The device can simulate various working conditions in actual production, provides an emulsion stability evaluation report, and is beneficial to optimization of an oil field production process.

The present invention provides a subsystem for supplying an anode of a hydrogen-based fuel cell system, in particular a PEM fuel cell system, with a hydrogen recirculation stream, wherein the subsystem comprises a hydrogen recirculation stream line, a detection unit for detecting pressure values ​​or pressure value changes in the hydrogen recirculation stream, a jet pump and a hydrogen recirculation blower arranged in the hydrogen recirculation stream line, wherein a bypass line with a bypass valve is associated with the hydrogen recirculation stream line, wherein the bypass valve is designed to be controllable depending on detected pressure values ​​or pressure value differences in order to allow the introduction of the hydrogen recirculation stream into the jet pump selectively via the bypass line or the hydrogen recirculation blower.as well as a method for operating such a subsystem and a hydrogen-based fuel cell system with such a subsystem.

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

A high-power fuel injection pump plunger and barrel assembly lubricating structure comprises a fuel injection pump body, a plunger seat is connected to the fuel injection pump body, an oil inlet hole and an oil outlet hole are formed in the two sides of the upper portion of the plunger seat respectively, a plunger hole is formed in the middle of the plunger seat, a plunger and barrel assembly is arranged in the plunger hole, an annular groove is formed in the side face of the plunger hole, and an oil storage ring is arranged in the annular groove. An oil injection needle hole is machined in the plunger seat and communicated with the oil storage ring, and an oil injection hole is machined in the oil injection pump body and communicated with the oil injection needle hole. Compared with the prior art, according to the high-power fuel injection pump plunger and barrel assembly lubricating structure, the oil storage ring is arranged in the plunger hole, long-time oil storage is achieved through the oil storage ring, meanwhile, the oil injection opening is formed in the side face of the pump body, and lubricating oil can be injected conveniently.

The invention relates to the field of refrigeration, in particular to a regulation and control method of a pump-driven two-phase flow refrigeration system, which comprises the following steps: S1, starting the pump-driven two-phase flow refrigeration system which comprises an evaporator serving as a user unit, separating a gas-liquid mixed refrigerant discharged by the evaporator through a gas-liquid separator, and storing the separated gas-liquid mixed refrigerant in a refrigeration room; the gaseous refrigerant is condensed by the condenser and then conveyed to the evaporator through the injection pump, and the liquid refrigerant sequentially passes through the liquid storage tank, the main pump and the injection pump and then is conveyed to the evaporator to form refrigerant circulation; a three-way regulating valve is arranged at an outlet of the condenser, after refrigerant condensed by the condenser is shunted by the three-way regulating valve, one part of the refrigerant is conveyed to the injection pump, and the other part of the refrigerant is conveyed into the liquid storage tank; and S2, dynamically adjusting the shunting mass ratio of the three-way regulating valve according to the running time of the refrigerating system, so that the ratio of the mass flow rate of the refrigerant directly flowing to the injection pump through the three-way regulating valve to the mass flow rate of the refrigerant flowing out of the condenser meets the condition. The cavitation phenomenon of the pump body in the refrigerating system is avoided, and the safety and reliability of the refrigerating system are improved.

The application discloses a kind of composite type steam injection vacuum pump unit of green energy utilization system, comprising: vacuum crystallizer, first condenser, for the condensation unloading of condensable gas in mixed gas in vacuum crystallizer, second injection pump, its mixed gas inlet is connected with the primary side outlet of first condenser, second condenser, for the condensation unloading of condensable gas in mixed gas being extracted by second injection pump and being sent into it, third injection pump, its mixed gas inlet is connected with the primary side outlet of second condenser, third condenser, for the condensation unloading of condensable gas in mixed gas being extracted by third injection pump and being sent into it, wherein, cooling water system is natural water source, cooling tower or refrigeration equipment, and water supply water temperature is 1.0-15.0 degrees;The application can utilize natural water source to achieve the effect of reducing steam consumption, reduce cost, under the condition of 1.0-15.0 degrees low temperature, can save steam volume by 85-90% at most.

A device for CO2 microbubble flooding comprises a microbubble generating device, a stirring and liquid storage device, an injection pump, a gas compressor, a gas-liquid mixer and a pressure stabilizing system, wherein the microbubble generating device adopts an integrally formed multi-layer cylindrical metal powder-sintered porous plate, and the diameters of microchannels on the porous plate are sequentially reduced from inside to outside. A solution containing additives in the storage device is stirred uniformly and then enters into a downhole gas injection base pipe through the gas-liquid mixer to be injected into a stratum, then a carbon dioxide gas compressed by the gas compressor is pumped into the downhole gas injection base pipe through the gas injection pump, and the gas generates microbubbles in situ when passing through the multi-layer porous device under the action of pressure difference.

A gear sleeve pull rod structure of an oil injection pump comprises a connecting sleeve, a connecting hole is machined in the connecting sleeve, a connector is machined at the upper end of the connecting sleeve, an outer gear sleeve is arranged on the outer side of the connector in a sleeving mode, a fixing hole matched with the connector is machined in the middle of the outer gear sleeve, teeth are machined on the outer side of the outer gear sleeve, and a pressing plate is arranged at the upper end of the outer gear sleeve. A through hole communicated with the connecting hole is machined in the middle of the pressing plate, the periphery of the through hole is fixed to the connector through screws, a pull rod is arranged on the side face of the outer gear sleeve, teeth are machined on the left side and the right side of the pull rod, and the teeth on the pull rod are meshed with the teeth on the outer gear sleeve. Compared with the prior art, according to the gear sleeve and pull rod structure of the fuel injection pump, after the gear sleeve and the pull rod are abraded, the outer gear sleeve is replaced, the pull rod can be reused after the position is changed, the whole gear sleeve and the whole pull rod do not need to be replaced, and cost is saved.

The application discloses a kind of continuous self-bleeding self-suction pumps, it is related to self-suction pump technical field, including main body, the upper portion of the main body is provided with self-suction tank, the top of the main body is equipped with steam jacket heat tracing, the upper end of steam jacket heat tracing is equipped with injection device, the lower end of self-suction tank is provided with sealing device, the middle of sealing device is equipped with pipeline, the bottom of pipeline is equipped with fixing device, the right end of fixing device is provided with ground tank, the upper end of ground tank is equipped with nitrogen pressure exhaust pipeline device.The application is fixed on the upper end of steam jacket heat tracing by outer frame, then connects steam pipe line by the pipe joint of right end, exhausts gas in ground tank to expansion pipe, carries out gas expansion, exhausts the gas after completion of expansion to mixing chamber, makes it mixed jet pump, then is discharged by nozzle, without manual filling pump.Again by the pipeline cavity of through frame inner cavity through connecting pipeline.

1. The name of the design product: quick switching support. 2. The use of the design product: for fixing and installing medical equipment such as injection pump, infusion pump, etc. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The invention belongs to the technical field of fluid conveying equipment, and particularly relates to a steam-jet pump with a detachable nozzle. The steam jet pump with the detachable nozzle comprises a pump body and a core assembly. The pump body comprises a containing cavity and a suction chamber which communicate with each other. The core assembly is detachably arranged on the pump body and comprises a base shaft and a nozzle arranged at one end of the base shaft, the base shaft and the nozzle are at least arranged in the containing cavity, and the outlet end of the nozzle extends into the suction chamber. According to the application, the core body assembly integrated with the basic shaft and the nozzle is integrally disassembled, and a new core body assembly is installed, so that the time required for replacing the nozzle is shortened, the cost is reduced, and the working efficiency is improved.

This utility model provides an electrolyte cleaning mechanism, including a cleaning fluid delivery assembly, an injection pump assembly, and a pneumatic control assembly. The cleaning fluid delivery assembly includes a cleaning fluid storage tank, a cleaning fluid storage tank air pipe, a cleaning fluid storage tank inlet pipe, a cleaning fluid storage tank manual inlet pipe, a cleaning fluid storage tank inlet pipe, a cleaning fluid storage tank inlet filter, a cleaning fluid storage tank outlet pipe, and a cleaning fluid storage tank outlet pipe socket. The injection pump assembly includes multiple injection pump units, the output ends of which respectively deliver cleaning fluid to an injection machine. The pneumatic control assembly is connected to control the air pressure inside the cleaning fluid storage tank. This electrolyte cleaning mechanism is used to clean the injection channels of the injection pump and injection machine, preventing electrolyte crystallization and blockage of the injection channels. The cleaning fluid storage tank inlet filter filters the cleaning fluid, ensuring that no impurities enter the injection pump and injection machine, effectively guaranteeing the cleaning effect.

The utility model discloses an oiling system, and discloses a traction device and a drying oven with the oiling system, and a coating machine with the traction device or the drying oven, the oiling system is used for oiling an oil storage cavity of a roll shaft support and comprises an oiling pump and a negative pressure pump, the oiling pump is used for oiling the oil storage cavity and is provided with an oiling port, and the oiling port is communicated with the oil storage cavity; the negative pressure pump is provided with a suction port, the suction port is located in the oil storage cavity, and the negative pressure pump sucks redundant lubricating oil in the oil storage cavity through the suction port. According to the oil injection system, redundant lubricating oil in the oil storage cavity can be pumped away, and the storage amount of the lubricating oil in the oil storage cavity is kept stable.

The present disclosure relates to a handheld apparatus with an automated media dispenser comprising: a cam, comprising an eccentrically attached lobe; a transducer, pivotally attached to said cam, in an offset in relation to the axis of rotation of said cam; a media container, installed in said apparatus, for dispensing media, comprising a jet-pump capable of dispersing at least one droplet of media once said jet-pump is pressed; at least one fork- cam, comprising a follower, pivotally connected to said apparatus; and an electric actuator, for driving said cam and said eccentrically attached lobe, for whirling said transducer in loops, and for pushing said follower of said fork- cam, when said follower is in the space of orbit of said eccentric lobe of said cam, for pressing said jet-pump for releasing a droplet of media in proximity to said transducer when said transducer is far from said jet-pump.

A system for use in a vehicle includes at least two hydraulic damper assemblies. The system includes an injection pump in fluid communication with the hydraulic damper assemblies. The injection pump includes a barrel having an opening. The injection pump includes a plunger slidable within the barrel in a first direction and a second direction, the first direction causing hydraulic fluid to move into the barrel via the opening and the second direction causing hydraulic fluid to move out of the barrel via the opening. The system includes an actuator supported within the barrel and operatively coupled to the plunger.

The invention relates to the technical field of medical instruments, in particular to a structure for protecting an injection pump piston and a protection method thereof.The structure comprises a pump body, an injector shell pressing plate is fixedly connected to the right side of the bottom of the front side of the pump body, a guide plate is fixedly connected to the bottom of the right side of the pump body, and an electric push-pull rod is arranged at the bottom of the inner wall of the pump body; by arranging the pump body, the injector shell pressing plate, the guide plate, the electric push-pull rod, the push-pull block and a piston rod connecting mechanism, it is crucial to achieve precise control and all-around effective protection of an injection pump piston, and the injection pump piston is prevented from being damaged. In the injection operation process, the system adopts the bidirectional electric push rod to be tightly matched with a series of well-designed linkage structures, so that not only is the stable and firm clamping of the piston push rod successfully realized, but also the piston can smoothly slide in the injection cylinder without hindrance.

The utility model provides a small injection pump structure assembly and aims to solve the technical problems that in the prior art, a plurality of parts of an injection pump need to be machined in batches and then assembled, and the structure and assembly are complex. The check valve mainly comprises a valve core and a valve body, the injection pump is more compact in structural design and only comprises the valve body and the valve element, and the inlet channel, the feeding channel and the vacuum chamber of the injection pump are all formed in the valve body when the parts are machined; the pump is only composed of two parts, machining is convenient, assembly is avoided, and economical efficiency is better; meanwhile, the small-size and compact injection pump can be applied to a very small use scene, and the considerable mixing and conveying efficiency is still kept under the condition that the size is reduced.