56 results about "Single injection" patented technology

The invention discloses a fuel injection method and device of an engine, a vehicle and a storage medium, a cylinder cover of the engine is provided with a fuel injector, a glow plug is arranged below an air inlet channel, the fuel injector is configured to inject fuel into a combustion chamber of the engine, and the glow plug is configured to heat the combustion chamber of the engine. The method comprises the steps that under the condition that an engine starting instruction is received, the cooling water temperature of an engine is obtained; under the condition that the temperature of the cooling water is smaller than or equal to a first preset temperature threshold value, the glow plug is controlled for heating; and under the condition that the temperature of the glow plug reaches the second preset temperature threshold value, the motor of the vehicle is controlled to drag the engine to rotate at the preset rotating speed, and the fuel injector is controlled to conduct single-time injection into the combustion chamber in the later period of the compression stroke. According to the fuel injection method, the problem that single-fuel cold start of the methanol engine is difficult in cold weather can be solved, the success rate of cold start of the engine is increased, and the cost can be reduced.

The present invention relates to a sustained-release injectable composition containing dutasteride. Compared with the conventional Avodart (registered trademark) taken once a day, even if the dosage of dutasteride is the same as or less than that of Avodart, it is possible to show a sustained release effect of dutasteride for 3 months or more, and a long-term drug-taking effect can be shown by a single injection. In addition, it can show a therapeutic effect on benign prostatic hyperplasia, prostate cancer, and hair loss continuously for 3 months or more. The microparticles contained in the sustained-release injectable composition have a constant average diameter, can regulate the release of the drug, and maintain a constant effective drug concentration, and can reduce the foreign body sensation and pain when administered to patients as an injection.

The present disclosure is directed to methods of performing affinity chromatography. The injection elution methods disclosed herein afford rapid and robust elution of a target analyte from an affinity chromatography column, therefore improving workflow efficiency. Further, the single injection elution methods result in highly concentrated samples, mitigating the need for sample concentration or manipulation.

The invention discloses a screening method for synchronously and rapidly analyzing new pollutants through single sample injection, and relates to the technical field of environment screening. According to the invention, a non-targeted screening, targeted screening and quantification technology for one-time pretreatment of multiple compounds in a water sample based on an electrostatic field orbitrap high-resolution gas chromatograph-mass spectrometer and synchronous and rapid analysis of the compounds by single sample injection under the same instrument condition is realized. Compared with the existing method for independently carrying out non-targeted screening, targeted screening and quantitative analysis on the compounds, the method has the advantages that the sensitivity of non-targeted screening is improved, the risk that low-concentration specific pollutants cannot be detected by non-targeted screening is reduced, and the defects that in targeted screening and quantitative analysis, the spectrogram information of the compounds is incomplete, and the detection sensitivity is low are reduced. The risk that misjudgment and false positive problems easily occur is solved, and the problem that non-targeted screening is incompatible with targeted screening and quantitative analysis is solved. Through the method, the analysis time can be effectively shortened, the analysis efficiency can be improved, and the analysis cost can be saved.

The invention provides novel injection type glycerine enema which comprises an injection assembly, and the injection assembly comprises an injection tube, a piston, a push rod, a push block, a nipple, a fixing ring, a sealing ring, a gradually-hardened tube, a cavity, an L-shaped plate, a clamping block, a flexible steel rope, a pull ring, a mounting block and a clamping groove. And a piston is connected to the inner wall of the injection tube in a sliding manner. The gradually-hard tube is inserted into a place where the injection tube is inserted, the push block is pushed to drive the push rod to move, the push rod drives the piston to slide on the injection tube, and liquid medicine is pushed in through the gradually-hard tube, outflow and injection caused by two-time extrusion of common glycerine enema are avoided through one-time injection of 20 ml, two-time mucosa damage is avoided, pollution caused by excrement back-pumping after extrusion is finished is avoided, and the injection efficiency is improved. The pull ring is pulled leftwards, the pull ring drives the clamping block to be separated from the clamping groove through the flexible steel rope, the sealing ring is moved to take down the gradually-hard tube, and the gradually-hard tube is disinfected and cleaned respectively, so that the comfort degree is improved, the rectal mucosa is not prone to being damaged, all liquid medicine can be pushed in in a pushing injection mode, and the liquid medicine is not left and wasted.

The utility model discloses a bath heater box production injection mold which comprises an upper mold set, a lower mold set, an upper mold core and a lower mold core, and a first forming concave position and a second forming concave position are arranged on the upper mold core in a central symmetry mode. A first forming convex position and a second forming convex position which can be matched with the first forming concave position and the second forming concave position respectively to form a cavity are further arranged on the lower mold core in a central symmetry mode, and clamping convex forming grooves are further formed in the opposite sides of the first forming concave position and the second forming concave position respectively; and clamping bulge slide positions which can be respectively matched with the clamping bulge forming grooves for forming are also arranged on the lower die set and are positioned on two sides of the lower die core. Through the first forming concave position and the second forming concave position which are symmetrically arranged and the first forming convex position and the second forming convex position which are symmetrically arranged, forming of two box bodies is completed through one-time injection molding, the production efficiency is greatly improved, and meanwhile through matched arrangement of the clamping convex forming grooves and the clamping convex slide positions, the production efficiency is greatly improved while the box bodies are formed. And clamping protrusions on the side wall of the box body are synchronously formed, practicability and convenience are achieved, and follow-up machining is not needed.

The invention discloses a timed and quantitative epinephrine hydrochloride injection pump which comprises a mounting shell, a single dose display screen fixedly mounted at the top of the mounting shell, an interval time display screen fixedly mounted at the top of the mounting shell, an injector type display screen fixedly mounted at the top of the mounting shell, and an interval time adjusting key mounted at the top of the mounting shell. A single dose adjusting key is mounted at the top of the mounting shell; by setting the injection interval time and the single injection dosage, the processor and the controller can control the push injection electric cylinder to operate in order, and when the push injection electric cylinder operates, the push injection plate can push and press the end of the injector in order at intervals, so that epinephrine hydrochloride in the injector is injected in a timed and quantitative mode, and when cardio-pulmonary resuscitation rescue is carried out, the injection efficiency is greatly improved. By means of the device, effective supply of medicine can be guaranteed, meanwhile, the interval time of injection every time is accurately controlled, the rescue success efficiency is greatly improved, and more importantly, manpower resources are greatly saved through the use of the device.

This invention relates to an absorbable, slow-release regulator for off-season antler growth in sika deer and red deer, and its preparation method, belonging to the field of off-season antler growth regulators. The regulator comprises 330 mg–360 mg medroxyprogesterone acetate (MPA), 50 mg–55 mg dextran sulfate (DS), and 200 mg–220 mg sodium hyaluronate (HA), diluted with water for injection to a final volume of 1.0 mL. The molecular weight of medroxyprogesterone acetate (MPA) is 386.52 kDa; the molecular weight of dextran sulfate (DS) is 36–50 kDa; and the molecular weight of sodium hyaluronate (HA) is 20–400 kDa. This invention utilizes exogenous progesterone to induce off-season antler growth in male deer through hormonal regulation. The use of absorbable materials is environmentally friendly and harmless to the body, allowing for natural absorption and normal excretion through the body's metabolic processes. A single injection is sufficient to provide efficacy for over 35 days. Using progesterone to regulate off-season antler growth is low-cost and has a high success rate.

The utility model relates to the technical field of mold preheating, and discloses a natural gas mold preheating device which comprises a combustion tube and a connecting tube, and a plurality of air holes are formed in the side wall of the combustion tube; the nozzle structure comprises a hoop, an injection pipe, lug plates and mounting holes, the hoop forms an annular structure with a notch, the two lug plates locked through bolts are fixedly arranged at the notch of the hoop, the mounting holes are formed in the lug plates, the bolts are mounted in the mounting holes, the injection pipe is detachably connected with the hoop, the hoop is clamped on the outer wall of the combustion pipe, and the nozzle structure is formed by the mounting holes. The position of the clamp is adjusted to enable the injection pipe to directly face the gas hole, the bolt penetrates through the mounting hole, the fastening nut, the screw and the nut to enable the two lug plates to be close to each other, the clamp wraps the combustion pipe, fuel gas is sprayed out of the injection pipe, the injection pipe is used for replacing the combustion pipe to be ablated, and after long-term use, even if the injection pipe is ablated, the injection pipe cannot be damaged. And only a single injection pipe needs to be replaced, so that the later maintenance cost is reduced, and accidents caused by ablation of the combustion pipe are avoided.

The utility model discloses a single-injection-channel combustor with double gas distribution output channels. The single-injection-channel combustor comprises a gas distribution shell seat and a gas distribution cover plate. The gas distribution shell base is provided with an injection bottom groove extending in the front-back direction. An injection cover groove is formed in the lower side of the gas distribution cover plate; an injection channel communicated with the outer ring gas mixing cavity is defined by the injection cover groove and the injection bottom groove; a central gas mixing cavity is formed in the upper side of the gas distribution cover plate; and the gas distribution cover plate is provided with a central gas guide channel in the side direction of the injection cover groove. According to the two-ring fire burner, the gas part of the outer ring gas mixing cavity can be transmitted to the central gas mixing cavity by utilizing the central gas guide channel, so that a two-ring fire burner structure with two gas distribution output channels is formed; on the premise that a simple combustor structure of a single injection channel is kept, double gas distribution output channels capable of meeting the double-ring fire gas supply requirement are provided.

The utility model discloses a kind of pressurized core mould, it is related to pressurized core mould technical field, including top cover, the top cover top is fixedly connected with injection port, the bottom of top cover is provided with forming assembly, the bottom of forming assembly is provided with bottom mould.The pressurized core mould is to solve the problem that only single production workpiece can be produced in prior art mould, production efficiency is low and it is difficult to meet the batch manufacturing demand, the cavity structure of top mould and bottom mould cooperation is set in the present application, and cross feed groove is designed in top mould, after injection liquid is injected into injection port, it can be evenly distributed to multiple cavities from four directions along cross feed groove, the structure realizes the synchronous forming of multiple workpieces by single injection process, and the accurate positioning of fixed sleeve and limiting sleeve and spring buffer mechanism are matched, which not only guarantees the uniformity of multi-cavity injection molding and the stability of finished product quality, but also significantly improves production efficiency, effectively reduces single manufacturing cost.

The utility model discloses a hot runner, mould, wherein hot runner contains hot runner body and the glue inlet, and the glue inlet is located on hot runner body, and is linked with the injection molding machine nozzle of outside, still contains: bottle embryo injection nozzle, bottle embryo injection nozzle is linked with the bottom of the bottle embryo cavity of outside's glue inlet intercommunication, and bottle embryo injection nozzle conveys injection molding material to bottle embryo cavity, handle injection nozzle, handle injection nozzle is linked with the bottom of the handle cavity of outside's glue inlet intercommunication, and handle injection nozzle conveys injection molding material to handle cavity. The utility model discloses through adding a handle nozzle, realizes handle single injection molding, is not affected by bottle embryo injection molding, can shorten injection molding time, guarantees the heat of bottle embryo to blow -molding qualified handle bottle.

The utility model discloses an ejection short needle assembly and a high-speed injection device, which comprise an injection cavity for storing a medium, an ejection short needle assembly and an ejection short needle assembly, wherein the internal pressure of the injection cavity is variable; the ejection valve element is installed in the injection cavity in a sliding mode in a plunger mode, and the short needle head is communicated with the high-pressure end face of the injection cavity through a valve body. When the pressure in the injection cavity is increased, the ejection valve element can move in the first direction; the valve body can be in a communicating state only when the internal pressure of the injection cavity exceeds a set threshold value; or the valve body can be in a communication state only after the displacement of the ejection valve element is larger than the set threshold value, the probability of needle breaking and needle bending can be reduced, the injection depth of liquid medicine is guaranteed, the utilization efficiency of the liquid medicine is improved, the injection efficiency is improved, and the single-time injection time is shortened.

The present disclosure provides novel compositions for biologically active compounds that are administered through injection. The active compounds include, but are not limited to steroid hormones, diarylheptanoids, and flavonoids. These compositions are distinguished from the prior art through the addition of an oil to the overall composition, which results in a biphasic formulation. The oil serves to enhance the efficiency of delivery of the formulation to a human or animal subject, and reduces discomfort associated with the injection process. Optionally, one or more additional substances, each of which is soluble in oil, can be added to the oil to enable the deliverable of multiple active compounds in a single injection.

The invention discloses a glue injection gun with an adjustable single injection amount and an injection amount adjusting method, and relates to the technical field of injectors. The glue injection gun with the adjustable single injection amount comprises a quantitative propelling module, and the quantitative propelling module comprises a shell, a propelling assembly and a driving assembly; the propelling assembly comprises a push rod and a propelling plate; the driving assembly comprises a first rotating shaft, a first rotating arm and a second rotating arm. The first rotating arm drives the second rotating arm to rotate, the arc-shaped surface of the second rotating arm is matched and clamped with the arc-shaped clamping groove of the propelling plate, and the pushed teeth on the bottom surface of the push rod are matched and engaged with the propelling teeth of the propelling plate, so that the second rotating arm can push the push rod to advance for a specific distance when rotating for a constant angle, and then the piston rod of the injector is pushed to advance for a specific distance; therefore, the single injection amount of the fluid medicament is controlled. Such form is simple in structure and convenient to operate, and a user can conveniently and accurately control the total injection amount of the fluid medicament within a specific time period by recording the number of times of pressing the first cantilever.

A method and device for purifying fluids in a container and providing a system for the cleaning of a container in automated analyser systems, comprising a pump which is connected to a single injection nozzle, wherein the single injection nozzle is configured to provide an oscillating fluidic jet, as well as a method for the cleaning of a container in automated analyser systems, comprising the following steps of arranging a container in a mount below a single oscillation nozzle; providing a cleaning fluid to a pump, which is connected to a controller and the oscillation nozzle; aligning the oscillating fluidic jet to a surface of the container which is to be cleaned; applying a cleaning fluid through the pump to the oscillation nozzle; and cleaning a surface of the container with the cleaning fluid.

The present disclosure relates generally to systems, apparatuses, and processes for preparing a gas-infused additive that is useful within gas-floatation systems configured to separate solids and / or oils from a liquid within a suspension. The gas-infused additive can be injected into systems having a floatation consolidator to provide additional dissolved gas to the system. Advantageously, the processes and apparatuses disclosed herein are compatible with systems and processes having a single injection point for the addition of an additive or gas, without requiring substantial modification or reconfiguration of the system. The inventions described herein additionally teach that the gas-infused additive can be prepared and injected downstream of any pump present within the system, thereby protecting the pump from the damaging effects of cavitation corrosion and similar phenomena.

The utility model relates to the technical field of tracer injection, and discloses a sentinel lymph node tracer injector which comprises a needle cylinder, a needle head assembly is inserted into the bottom end of the needle cylinder, the needle head assembly comprises a needle head sleeve and an injection needle head, and the injection needle head is fixedly installed at the bottom of the needle head sleeve. According to the sentinel lymph node tracer injector, when a piston is controlled by an auxiliary pull rod to extract a tracer, a fixing ring fixedly connected with the surface of the auxiliary pull rod drives sliding blocks on the two sides of a pointing lever fixedly connected with a linkage arm to slide in two sets of sliding sleeve shells; in the sliding process, the extraction amount can be clearly known through comparison of the pointing lever and the milliliter line, meanwhile, one of the limiting grooves formed in one set of sliding sleeve shells is aligned with the milliliter line needing milliliter extraction, and then a limiting insertion rod is inserted to form limiting; and therefore, the single extraction amount is quantified in the extraction process, and excessive extraction is avoided.

The utility model relates to the technical field of injection molding machines, and provides a front mold plate of a horizontal two-plate turntable double-colored injection molding machine, which comprises a front mold plate body, a weight reducing groove which is concave inwards and is formed in the center of the front surface of the front mold plate body, and inner concave cavities which are formed in the upper, lower, left and right side surfaces of the front mold plate body, and the reinforcing ribs I are fixedly mounted in the inner concave cavities on the left and right sides. Under the matching action of the first reinforcing ribs, the second reinforcing ribs, the reinforcing strips and the weight reducing grooves, the structural strength and stability of the front formwork body can be enhanced, the front formwork body can achieve the effect of providing enough strength while reducing the weight and saving the cost, meanwhile, the hole distance size of the two head plate positioning rings is changed according to the requirement, and the machining efficiency is improved. According to the front mold plate, the center distance of the mold can be changed, so that the front mold plate body can meet the mounting requirements of a single injection table and a multi-size double injection table, the effect of meeting the mounting requirements of molds of different sizes and types is achieved, and the using effect and applicability of the front mold plate body are effectively improved.

The integrated bottle cap comprises an end cap, a connecting sleeve is fixedly connected to the bottom of the end cap, a connecting block is fixedly connected to one side of the top end of the end cap, a clamping groove is formed in one side of the connecting block, a fixing piece is fixedly embedded in the clamping groove, a sealing cover is arranged on one side of the fixing piece, and the sealing cover is fixedly connected to the bottom of the end cap. According to the integrated bottle cap and the bottle, the end cap, the connecting sleeve and the connecting block are of an integrated structure, additional independent injection molding is not needed, the labor cost and the time cost are effectively saved, and the integrated bottle cap and the bottle are convenient to use. The fixing piece is used for promoting the sealing column on the sealing cover to block the liquid outlet to achieve sealing operation, the connecting sleeve can be screwed to the bottle opening of the bottle body to achieve connection between the bottle cap and the bottle body, the bottle cap product is integrally formed, and the assembling link is omitted.

The present invention relates to a composition for sustained release injection for treating or preventing nervous system diseases and a method for preparing the same, and more particularly, to a composition for sustained release injection for treating or preventing nervous system diseases by continuously releasing cannabidiol for more than one month using particles containing cannabidiol, which can exert the effect of treating or preventing nervous system diseases. Furthermore, the composition for sustained-release injection contains cannabidiol which is non-toxic, has no side effects after long-term use and can be continuously used for a long term, and can exert an effect of treating or preventing nervous system diseases for more than one month by single injection, thereby greatly improving administration convenience.

The present invention discloses a drug injection device for heart failure, and key technical solutions thereof are as follows: The device includes a delivery catheter and an abutting component disposed at one end of the delivery catheter. Multiple guide holes are formed in the abutting component. A reservoir tube is slidably connected in the delivery catheter. Multiple injection needles in communication with the reservoir tube are disposed at one end of the reservoir tube close to the abutting component. The multiple injection needles are slidably inserted in the multiple guide holes respectively in one-to-one correspondence. A sealing plate is rotatably connected in an inner wall of one end of the reservoir tube close to the injection needle. The present invention has the following technical effects: By providing the reservoir tube, the present invention enables adjustment of the movable tube's extension length from the injection tube during operation. This controls the distance between the injection piston and the sealing plate, where a space volume between the injection piston and the sealing plate is a total dosage of the single-dose medication. In this way, accurate dose control is achieved for each injection.

The invention relates to the technical field of natural gas extraction equipment, and discloses an external kinetic energy-free automatic agent injection device for a natural gas well, which comprises a main body mechanism, a supporting platform, a mounting frame arranged at the top of the supporting platform, and an agent box assembly arranged at the top of the mounting frame; the medicine injection mechanism comprises a driving assembly arranged on the top of the supporting platform. Through the synergistic effect of the driving assembly, the conveying assembly and the reset assembly, driving is achieved through the pressure of natural gas, air pressure is converted into mechanical energy, medicine extraction and quantitative injection are achieved, continuous medicine injection is achieved in cooperation with a medicine box movable plate e, no external energy is needed in the whole process, the operation energy consumption and the operation and maintenance cost are greatly reduced, and the working efficiency is improved. Energy supply limited scenes such as remote well sites are perfectly adapted, the adjusting assembly is matched with the connecting rod e, precise adjustment of the single injection amount of the medicament is achieved, the injection amount requirements of different mining stages are met, and the practicability of the device is remarkably improved.

The invention discloses a bent bone cement injector, and belongs to the technical field of bone cement injectors, the bent bone cement injector comprises a main body module, a quantitative injection module and a heat conduction module, the main body module comprises an operation cylinder, one side of the operation cylinder is fixedly connected with an injection cylinder, and one side of the injection cylinder is connected with an injection pipe; the heat conduction module is arranged on the outer surface of the injection cylinder, an adjusting door is hinged to the outer surface of the operation cylinder, the quantitative injection module comprises a piston movably connected to the interior of the injection cylinder, a thrust assembly is arranged on one side of the piston, and a grip is fixedly connected to the position, close to the other side, of the outer surface of the operation cylinder; through the arrangement of the piston, the thrust assembly, the forward transmission assembly, the reciprocating assembly, the trigger assembly and the direction limiting assembly, when the injector is used, continuous quantitative injection can be conducted, compared with manual boosting injection, the injection amount is more accurate, and the problem that too much or too little injection is conducted at a time is avoided.

The utility model relates to the technical field of injection molds, in particular to a multi-cavity threaded core-pulling mold which comprises a front mold assembly, a rear mold assembly, a threaded core-pulling assembly and a transverse core-pulling assembly, the rear mold assembly comprises a rear mold plate, the transverse core-pulling assembly comprises a first sliding block and a transverse core rod, and the front mold assembly comprises a front mold plate and an inclined guide column. At least two inclined through holes are formed in each first sliding block, the inclined guide columns are connected with the inclined through holes in a sliding mode and drive the first sliding blocks to slide in the set direction, and a plurality of cavity faces are arranged on the front mold plate and the rear mold plate respectively. A single first sliding block is used for driving a plurality of transverse core rods to move, so that the structure is simplified, at least two inclined through holes are further formed in the first sliding block, then at least two inclined guide columns are used for driving the first sliding block to move, and under the same space volume, more mold cavities can be formed in the mold, so that the mold structure is more compact. And more products can be produced through one-time injection molding of the mold, the mold use cost is reduced, and the product production efficiency is improved.

The application provides a kind of microbial detection analysis device, it is related to the field of microbial detection analysis, comprising: container assembly, the container assembly includes medicament storage and piston mechanism, control component can be linked piston mechanism to realize the operation of liquid injection to the inside of culture dish, under the control of control component, the fixed injection amount of piston mechanism each time, can quickly prepare a large number of same samples for analysis and detection use, greatly improve the accuracy of microbial detection analysis result, at the same time, the amount of single injection of piston mechanism can also be regulated, can adapt to different microbial analysis and detection sample preparation operation etc., solve the problem that multiple samples are prepared in the existing microbial analysis and detection, corresponding liquid medicine needs to be injected into the inside of culture dish by liquid injector manually, liquid injector does not have the function of quantitative liquid injection, the amount of liquid medicine in the inside of culture dish is not the same, easy to interfere with the result of microbial detection analysis, the problem of poor accuracy.

The present disclosure provides a method for measuring a concentration of a per- and polyfluoroalkyl substance and a liquid chromatography-tandem mass spectrometry system. The method includes: measuring concentrations of a plurality of per-and polyfluoroalkyl substances in a sample by liquid chromatography-tandem mass spectrometry in a primary measurement process of eluting the sample with an alkaline mobile phase, in which the plurality of per- and polyfluoroalkyl substances at least include one or more perfluoroalkyl phosphonic acids / phosphinic acids or polyfluoroalkyl phosphate esters. According to the method, by using the alkaline mobile phase to elute the sample, the rapid analysis on 93 PFASs including perfluoroalkyl phosphonic acids / phosphinic acids and polyfluoroalkyl phosphate esters can be completed by single injection. Additionally, the present disclosure also provides a method to rapidly analyze 10 PFASs by GC-MS / MS.

The injection system suitable for preparing the large ring piece comprises a liquid guide structure, a plurality of injection structures are evenly arranged in the circumferential direction of the liquid guide structure, and molten aluminum liquid can be injected; the moving structure is arranged below the liquid guide structure and comprises a moving platform, an annular mold is arranged at the top of the moving platform, the moving platform can drive the annular mold to rotate, the annular mold can receive the molten aluminum liquid sprayed out of the spraying structure, and finally the molten aluminum liquid can form an annular piece; molten aluminum liquid is sprayed out at the same time through the multiple spraying structures, the situation that the covering path of the spraying structures is too long when a single spraying structure is used is avoided, and therefore it is guaranteed that new molten aluminum liquid can be combined with molten aluminum liquid in a semi-solid state below when being sprayed down; therefore, the annular part with better tissue compactness and uniformity can be obtained, and the forming quality of the annular part is improved.

The invention discloses a device for measuring the elastic modulus of fuel oil. The device comprises a long measuring pipe, a pressure accumulator, a data acquisition and control module, a fuel oil injection module and a pressure testing module, the fuel oil elasticity modulus measuring method comprises the steps that the single-time average oil injection quantity of an oil injector is measured through a weighing method; the fuel oil elastic modulus measuring device is adopted to obtain the pressure waveform in the long pipe in the single injection process; the sound velocity of the fuel oil in the long pipe is obtained based on the proportional relation, measured through a weighing method, of the oil injection quantity and the pressure wave integral value in the long pipe; and calculating a sound velocity correction coefficient based on the time interval of the adjacent pressure waves in the long pipe, and solving the elastic modulus of the fuel oil. The elastic modulus of the fuel oil is indirectly measured through the sound velocity correction coefficient used in the fuel injection rate test, and the device and the method are simple, low in cost, high in measurement efficiency and suitable for measuring the elastic modulus of the fuel oil under the working condition of an engine.

The utility model discloses a quantitative syringe, which relates to the technical field of syringes and comprises a syringe shell, a push handle is fixedly arranged on the syringe shell, a rubber piston is slidably connected in the syringe shell, a fixing block is embedded in the rubber piston, a long handle is connected onto the fixing block, and the long handle is connected onto the syringe shell. The long handle penetrates through the push handle and is movably arranged, and a plurality of clamping grooves are formed in one side of the long handle; a buckle assembly is arranged at the bottom of the mounting block and comprises the mounting block, a limiting column and a first spring. By arranging the limiting column and the clamping groove, the medicine amount during single-time injection can be accurately controlled, deviation of the medicine amount is avoided, the clamping column is arranged, the long handle can be clamped, accidents caused by mistaken touch are avoided, the long handle can be replaced, and then the injection requirements of different unit medicine amounts are met.