1463 results about "Injection device" patented technology

The invention relates to the technical field of die casting, in particular to a feeding and injection device of a die casting machine. Comprising a charging barrel, a punch, an injection rod, an injection oil cylinder, a charging barrel sealing plate, a liquid inlet pipe and a driving part, the charging barrel is arranged in the fixed plate, the injection oil cylinder is arranged below the fixed plate, a punch is arranged in the charging barrel, a sealing plate is arranged on the side edge of the charging barrel, a guide structure is arranged on the sealing plate and matched with the charging barrel, a driving component is arranged on the bottom side of the sealing plate and fixed to the fixed plate, and the sealing plate moves under the action of the driving component. A charging barrel opening in the side surface of the charging barrel is opened and closed. When the sealing plate is in an open state, molten metal in the liquid inlet pipe begins to enter the charging barrel through the opening, the sealing plate closes the side opening of the charging barrel, the punch presses the molten metal into a mold cavity under the action of the injection oil cylinder, and a die-casting product is obtained after cooling forming. By adopting the opening and closing mode of the sealing plate, the time or the cooling degree of molten metal in the charging barrel is reduced, the feeding precision and efficiency are improved, and the injection period is shortened.

An injection molding machine includes an injection device including at least first and second injection units, and one mold clamping device. A molding material is injected into a first cavity space by the first injection unit, and a molding material is injected into a second cavity space by the second injection unit. The injection molding machine further includes a control device controlling the injection device and the mold clamping device, and a storage device storing a set time in advance. The control device starts injection of the second injection unit after elapse of the set time from a predetermined time point. The predetermined time point is a time point at which the first injection unit starts injection or an earlier time point. The set time is a delay time for delaying start of injection of the second injection unit from start of injection of the first injection unit.

Provided is an injection device for injecting a substance, comprising a case receiving a barrel containing the substance to be injected and comprising a stopper movable inside the barrel, a plunger unit comprising a triggering portion, the plunger unit being coupled to the stopper and movable with regard to the case from an initial, proximal position to a final, distal position to inject the substance when the barrel is provided into the case, an end-of-dose indicator movable from a hidden position to a visible position in which at least one portion of the end-of-dose indicator is visible to a user, hiding means for locking the end-of-dose indicator in the hidden position and configured to be unlocked by the triggering portion of the plunger unit when the plunger unit reaches an indicator position.

The invention discloses an experimental system and method for accelerating and promoting a gas-liquid-solid three-phase reaction in a multi-stage manner, and relates to the technical field of reaction equipment and carbon emission reduction. The experiment system comprises: a reaction kettle provided with a visual window and an atomization device mounting groove; the floating type piezoelectric ceramic atomization device is embedded in the atomization device mounting groove; the gas injection device comprises a gas hole distribution pipe and a gas injection pump connected with the gas hole distribution pipe; uniformly distributed micropores are formed in the pore distribution pipe; the magnetic stirring device comprises a magnetic driving base, a rotating speed controller and a magnetic stirrer arranged in the reaction kettle; the magnetic stirrer is arranged above the air hole distribution pipe; the bracket net is arranged on one side, deviating from the air hole distribution pipe, of the magnetic stirrer; and the temperature control device comprises a constant-temperature bath and a temperature controller for controlling the temperature of the constant-temperature bath. The experimental system is compact in structural design, modularized, simple and convenient to operate, capable of efficiently accelerating the gas-liquid-solid three-phase reaction and suitable for various experimental studies.

The invention relates to the technical field of civil engineering construction, in particular to a civil engineering construction secondary structure bar planting construction suit and a construction method.The construction suit comprises a drilling device which comprises an electric drilling machine and a drill bit and is used for drilling bar planting holes in preset positions of a wall; the hole cleaning device is mounted at the hole opening of the steel bar planting hole and is used for cleaning broken sand and dust in the steel bar planting hole; the glue injection device is used for injecting glue into the steel bar planting holes; the construction method comprises the steps that a dust collector is started in the drilling operation process, and chippings and dust generated in the drilling process are sucked into the dust collector; after drilling is completed, the brush head is replaced on an electric drilling machine, the brush head is repeatedly pushed and pulled through the electric drilling machine to clean the embedded steel bar holes, the dust collector continuously works till the brush head completes cleaning of the embedded steel bar holes, and then glue is injected into the embedded steel bars; according to the scheme, impurities in the embedded steel bar hole can be deeply cleaned, and the anchoring force of the embedded steel bar and the hole is protected.

An injection device (2) of an injection molding machine (1) includes a heating cylinder (18) having a gas introduction port (30) and a screw (19), and a gas supply device (5) is connected to the gas introduction port (30). The gas supply device (5) includes a gas supply source (33) and a gas pressure regulating unit (34). The gas pressure regulating unit (34) regulates a gas pressure and supplies the gas when a gas from the gas supply source (33) is introduced into the gas introduction port (30). Specifically, the gas pressure is caused to change in a molding cycle and is increased to a high pressure in a metering process (61). That is, a pressure increasing period (71) in which the gas pressure increases at least partially overlaps with the metering process (61).

The invention discloses glue injection equipment for anti-seepage construction of a building wall, and relates to the technical field of anti-seepage construction of walls, the glue injection equipment comprises a mounting plate, universal wheels and directional wheels are mounted on the upper side and the lower side of the rear end face of the mounting plate respectively, the universal wheels and the directional wheels are used for moving the glue injection equipment on the surface of the wall, and an operation handle is mounted on the front end face of the mounting plate; the grooving mechanism is mounted on the rear end face of the mounting plate, and the grooving mechanism is used for forming a V-shaped groove in the crack leakage position on the surface of the wall; the driving mechanism is mounted on the grooving mechanisms and used for driving the grooving mechanisms on the left side and the right side of the mounting plate to move alternately; through cooperative arrangement of the grooving mechanism and the glue injection mechanism, forming of a V-shaped groove and synchronous continuous glue injection treatment on the surface of the wall surface leakage gap can be achieved, tedious punching, glue injection pipe installation and multiple times of pipeline connection glue injection operation are not needed, and therefore the efficiency of glue injection construction of the wall surface leakage gap is improved.

The invention discloses an underwater connector technology, and aims to provide an oil filling port device for an oil filling balance underwater connector and an oil filling process of the oil filling port device, and the technical scheme is characterized in that the oil filling port device comprises an oil filling hole, an oil sealing screw and an oil filling device which are arranged on a connector shell; the oil filling hole is of a composite structure and sequentially comprises an unthreaded hole part and an inner threaded hole part from the outer side to the inner side of the shell, the inner diameter of the unthreaded hole part is matched with the outer diameter of the oil sealing screw, radial sealing is achieved through an oil sealing ring, and the inner threaded hole part is matched with an outer thread of the oil sealing screw to achieve fastening connection. A plane is arranged outside the oil filling hole and perpendicular to the unthreaded hole part, and a dovetail groove structure is arranged on the outer side of the plane; the whole oil sealing screw is in a T shape, an external thread of the oil sealing screw is matched with an internal thread hole part of the oil filling hole, and an installation threaded hole used for being connected with an external thread connector at the front end of a center shaft of an oil injection device is formed in the end of the oil sealing screw. The underwater connector is suitable for the technical field of underwater connectors.

The pulping and feeding mechanism comprises a feeding device, a seat stand pushing device and a melt injection assembly, the melt injection assembly comprises a melt device, a valve device, an injection device and an injection port, the output end of the feeding device is connected with the melt device, and the output end of the injection device is connected with the valve device. The valve device is arranged between the melting device and the injection device, the melt injection assembly is installed on the seat platform pushing device, the seat platform pushing device drives the melt injection assembly to advance and retreat, the injection device comprises an injection cylinder, an injection plunger assembly and an injection oil cylinder, and the injection oil cylinder is in driving connection with the injection plunger assembly. The injection plunger assembly is movably arranged on the syringe, an acting piece is arranged on the injection plunger assembly, and a travel switch is arranged on the injection device. According to the pulping and feeding mechanism, the melting device, the valve device, the injection device and the injection port are arranged, so that the weight of slurry conveyed to the injection chamber of the tilting vertical injection mechanism every time is controlled more accurately.

The invention discloses a layered, zoned and differentiated CO2 injection system and method for a blast furnace, and belongs to the technical field of ferrous metallurgy low carbon. The system comprises a CO2 supply and distribution system, a tuyere area injection module, a furnace body middle-lower part injection module and a furnace body upper part injection module. And according to the temperature gradient and atmosphere layering characteristics in the blast furnace, a differential CO2 distribution proportion and a collaborative thermal compensation strategy are adopted. An oxygen-CH4 synergistic injection device is arranged in a tuyere area, and rapid conversion of CO2 is promoted by using a high-temperature strong reducing atmosphere; a biomass charcoal synergistic injection device and an angle-adjustable nozzle are arranged at the middle lower part of the furnace body, so that efficient gasification reaction is realized; and low-concentration CO2 mixed injection is adopted at the upper part of the furnace body, so that indirect reduction reaction is promoted. According to the invention, the CO2 conversion rate is 65-80%, the coke ratio is reduced by 15-25%, the consumption of CO2 per ton of iron is 260-90Nm < 3 >, the carbon emission is obviously reduced, and the ironmaking efficiency is improved.

The invention provides a system and a method for regulating and controlling a plate bulging strain microcell. The system comprises a hydraulic bulging device, a multi-axis movement system, an online vision measurement system, a control system and a low-temperature medium spraying device, a plate is arranged in the hydraulic bulging device, and the low-temperature medium spraying device is installed at the tail end of the multi-axis movement system. Signals generated by the on-line vision measurement system are input into the control system, and the control system outputs the signals to the multi-axis movement system and the low-temperature medium injection device. According to the method and the device, the strength difference, the hardening difference and the ductility difference of the light alloy in different temperature intervals are utilized, and the method and the device capable of realizing strain microcell regulation and control are designed; different from preposed regulation and control measures in the prior art, such as integral heating, integral ultralow-temperature freezing and preset local heating and cooling measures, the strain evolution trend and rule of the plate can be monitored in real time.

The invention provides an annulus injection paraffin control device and a paraffin control method.The annulus injection paraffin control device comprises a paraffin removal and control well completion pipe string arranged in a casing annulus, the paraffin removal and control well completion pipe string is communicated with a ground injection device, a paraffin removal and control agent injection valve is connected to the paraffin removal and control well completion pipe string and comprises a check valve and a counterbalance valve which are oppositely arranged, and the check valve is communicated with the counterbalance valve. An inlet of the paraffin removal and inhibition agent injection valve is formed in one side of the back pressure valve and communicated with the annulus, and an outlet of the paraffin removal and inhibition agent injection valve is formed in one side of the check valve and communicated with the oil pipe. The well completion pipe string with the paraffin removal and inhibition agent injection valve is tripped into an original well, a paraffin removal and inhibition agent injection channel is an annular space between an oil pipe and a casing pipe, the problems that the friction resistance is large, the starting pressure is high and the operation load is high when a capillary pump injects the paraffin removal and inhibition agent are solved, oil pipe perforation is not carried out, the well completion pipe string structure is intact, and the service life of the well completion pipe string is prolonged. Well integrity issues with failure of the first barrier are addressed.

The invention discloses an intelligent tree trunk punching and medicine injection integrated device which comprises a device body, a liquid storage cavity used for storing liquid medicine and a battery bin used for containing a battery pack are formed in the device body, a drilling mechanism and a medicine injection mechanism are arranged on the two sides of the device body respectively, and a diameter measuring mechanism used for measuring the diameter of a tree trunk is arranged at the top of the device body; the drilling mechanism, the medicine injection mechanism and the diameter measuring mechanism are powered by the battery pack, and the device body is further provided with straps for bearing. The drilling mechanism comprises a drilling machine, the drilling machine comprises a first output shaft, a containing hole is formed in the center of the end of the first output shaft, and an inner drill bit and a micro motor are arranged in the containing hole; the medicine injection mechanism comprises a medicine injection pipe communicated with the liquid storage cavity, an on-off valve for controlling the on-off of the medicine injection pipe and a pump machine for driving liquid medicine in the liquid storage cavity to be discharged, the medicine injection pipe is sleeved with a plurality of blocking sleeves, and the blocking sleeves are made of nanocellulose / polyacrylic acid compounds with the water swelling characteristic.

The utility model discloses a rubber sealing plug molding raw material injection device which comprises a working table, an extrusion mechanism is fixedly installed on the top of the working table, one end of the extrusion mechanism is fixedly connected with a feeding pipe, a heating sleeve is arranged outside the extrusion mechanism, and the heating sleeve is fixedly connected with the feeding pipe. The top of the extrusion mechanism is provided with a material storage mechanism for storing and discharging materials, the top of the material storage mechanism is provided with an anti-blocking mechanism for preventing the materials from being blocked, and the workbench is provided with a lifting mechanism for driving the material storage mechanism to move up and down. The extrusion mechanism can convey raw materials forwards, the conveyed raw materials are matched with the heating sleeve for heating, so that injection supply of the raw materials can be completed through the feeding pipe, and the storage mechanism can move up and down along with the lifting mechanism, so that the storage mechanism can be matched with the anti-blocking mechanism, and the raw materials can be conveniently conveyed. In this way, the small-size connection position of the material storage mechanism and the extrusion mechanism can be prevented from being blocked, and the continuity of raw material injection is guaranteed.

The invention discloses an intelligent control spraying device driven by a gear connecting rod, and relates to the technical field of intelligent spray-washing, a driving rod is arranged between a spray-washing head and the surface of a cylinder to be spray-washed, the driving rod controls the inclination angle of the spray-washing head according to the distance between the spray-washing head and the surface of the cylinder, and a spray pressure control valve is arranged in the spray-washing head. The single crystal silicon column spraying device has the advantages that self-adaption resetting of the spraying device can be promoted through elastic force, additional manual adjustment is not needed, operation steps are reduced, meanwhile, when the spraying control rod is moved to the position making contact with a single crystal silicon column, the spraying device can be conveniently adjusted, and the spraying device is convenient to use and high in practicability. And the sealing ring on the other side can be sealed in a self-adaptive mode according to the rotating direction of the driving rod, so that the sealing ring can be sprayed to the outer wall of the monocrystalline silicon column more accurately during spraying, and the operation convenience and the self-adaption degree are improved.

The invention provides a vacuum hot-pressing forming machine for silicone rubber production and a forming method, and relates to the technical field of silicone rubber production. The vacuum hot-pressing forming machine for silicone rubber production comprises a machine body, a hydraulic driving device, a rubber injection device, a vacuum adsorption device and an upper pressing head. By means of an innovative four-station circulation operation mode, synchronous operation of mold preheating, material forming, product cooling and finished product taking is achieved, the productivity in unit time is greatly improved, accurate temperature control is conducted on the forming mold through the directional forced air cooling technology, the cooling waiting time is greatly shortened, and meanwhile the production efficiency is improved. The cooling uniformity of all parts of a product is remarkably improved, waste heat generated in the cooling process is converted into mold preheating energy through an original heat energy recovery system, an energy closed loop in the production process is constructed, the problem that traditional equipment is high in preheating energy consumption is solved, and structural complexity caused by an additional heating device is avoided.

An injection system device capable of adaptively adjusting concentricity with an inner hole of a charging barrel comprises an injection rod and a piston rod connecting seat, a mounting groove is formed in the piston rod connecting seat, a universal adjusting seat with a universal ball groove is arranged in the mounting groove, and the injection rod extends into the mounting groove and comprises a spherical universal joint matched with the universal ball groove. The spherical universal joint and the universal adjusting seat form a universal adjusting mechanism, and the spherical height of the universal ball groove is smaller than the spherical radius of the universal ball groove; the injection device further comprises a locking structure which is arranged on the piston rod connecting base and used for locking the adjusted injection rod. According to the injection device, even if the locking performance of the locking structure becomes poor or fails after the injection device is used for a long time, the locking performance of the locking structure can still be recovered through readjustment, so that the relative fixation between the injection rod and the piston rod connecting seat is ensured, the injection device can be continuously used, and the service life of the injection device is prolonged.

The invention relates to the technical field of solid material conveying, and particularly discloses a low-fluidity solid material conveying device and method. The device comprises a stock bin, a supporting structure, an auxiliary arch breaking system, a vibration feeding mechanism and a control system. The auxiliary arch breaking system is integrated with a pneumatic impact device and a high-pressure gas injection device and is used for preventing or eliminating arching of materials; the vibration feeding mechanism is hung below the stock bin through an elastic element, and continuous and stable output of materials is achieved. The control system is in communication connection with the weighing module and all execution components, and intelligently regulates and controls cooperative operation of the low-frequency air hammer, the air cannon and the vibration motor according to material state parameters monitored in real time through a built-in arching risk assessment model and a discharging flow dynamic balance model, and staged and self-adaptive arching breaking and feeding control is achieved. The problems of arching and blocking of low-fluidity solid materials in the conveying process are effectively solved, and the conveying continuity, stability and automation level are improved.

The invention discloses an expansion capsule body for deformation control of underground engineering and a using method, and belongs to the technical field of underground engineering supporting. The expansion bag body is made of a high-strength composite material, a plurality of gas chambers or liquid chambers which can be independently controlled are arranged in the expansion bag body, and media are injected through an injection device to enable the expansion bag body to expand, so that uniform supporting force is provided for surrounding stratums. The capsule body is provided with a real-time monitoring sensor, the capsule body and a control system can form a closed loop, the supporting strength is dynamically adjusted according to real-time data of stratum stress deformation, and active and accurate deformation control is achieved. The support has the remarkable advantages that the repeated adjustment capacity of repeated inflation and deflation of gas or liquid is achieved, the requirement for long-term or repeated stratum deformation can be met, and the problems that traditional support response is delayed and an existing bag body cannot be adjusted are solved. The structure is reliable, construction is convenient and fast, the method is particularly suitable for soft and non-uniform geological conditions in projects such as tunnels and foundation pits, and the safety and adaptability of underground projects are effectively improved.

To provide a method for discharging a substance from an apparatus.SOLUTION: By pressing an actuation assembly 426 of the apparatus down to a first predetermined position, an insertion rod 428 displaces a sealing member 434 from an opening 416, thereby allowing fluid communication between a first chamber 418 and a second chamber 436. By pressing the actuation assembly 426 down to a second predetermined position, the insertion rod 428 displaces a sealing member 412 from a second opening, thereby allowing fluid communication between the second chamber 436 and a third chamber 444. By pressing the actuation assembly 426 down to a third predetermined position, a needle assembly discharges a substance through a needle 448.SELECTED DRAWING: Figure 4

The invention discloses a waterproof and anti-falling infrared wireless controller and a production process thereof, and relates to the technical field of injection molds, a supporting column is arranged in an injection molding device main body, a servo motor, a rotating column, a connecting plate and an overturning template are mounted in the supporting column, an injection molding opening is formed in one side of the overturning template, and the rotating column is arranged in the supporting column; lower hydraulic cylinders are installed on the two sides in the injection molding device body, lower mold plates are arranged at the upper ends of the lower hydraulic cylinders, upper hydraulic cylinders are installed on the upper inner wall of the injection molding device body, upper mold plates are arranged at the lower ends of the upper hydraulic cylinders, air pumps are installed in the bottom ends of the supporting columns, the two ends of the air pumps communicate with air pipes, and one ends of the air pipes communicate with negative pressure plates. A plurality of negative pressure holes are formed in the surface of the negative pressure plate, a mounting plate is rotationally connected to one side of the lower end of the negative pressure plate, and a first hydraulic cylinder is mounted at the lower end of the mounting plate. According to the injection mold, injection molding and discharging work are separated, the working efficiency of continuous injection molding is improved, meanwhile, two times of injection molding work can be completed without disassembling the mold plate, and convenience is improved.

The invention relates to the technical field of bearing grease injection and homogenization, in particular to a bearing grease injection device. Comprising a grease injection table and a grease injection frame on the upper surface of the grease injection table. The grease injection frame is downwards connected with a grease injection box through an air cylinder. The grease injection box is communicated with a grease barrel through a material pipe; the lower surface of the grease injection box is fixedly connected with a fixed disc through a connecting rod; the dumbbell sleeves can be driven to get close to or get away from the fixing blocks along the upper sliding grooves in the rotating process of the rotating disc, under the condition that the dumbbell sleeves get close to or get away from the fixing blocks synchronously, the radial positions of the dumbbell sleeves on the fixing disc can be decreased or increased synchronously, and the grease injection heads can move along with movement of the dumbbell sleeves; in this way, the radial positions of the multiple grease injection heads on the fixing disc are adjusted, then multi-point simultaneous grease injection of bearings with different diameters is achieved, and universality is high.

The utility model discloses an arc-shaped combined sealing ring airtightness test tool, which relates to the technical field of airtightness test tools, and comprises a support frame, the support frame is fixedly connected with a telescopic rod, the telescopic rod is fixedly connected with a gas injection device, the gas injection device is fixedly connected with a first gas transmission pipeline, and the first gas transmission pipeline is fixedly connected with a second gas transmission pipeline. The first gas transmission pipeline is fixedly connected with an upper mold, the upper mold is provided with a first vent hole, the upper mold is fixedly connected with a sealing ring, the vent hole communicates with the first gas transmission pipeline, the inner wall of the side wall of the supporting frame is fixedly connected with a fixing plate, and the fixing plate penetrates through and is fixedly connected with four second gas transmission pipelines; and the tops of the four second gas transmission pipelines are fixedly connected with a lower mold. The four telescopic rods are arranged to be connected with the gas injection device, the first gas transmission pipeline communicates with the upper mold, the second gas transmission pipeline communicates with the lower mold, and the integrated design of the gas injection and detection structure is achieved.

The invention discloses a CG inner end joint grease injection device which comprises a base, a weighing sensor fixed to the base, a CG inner end joint supporting seat with the lower end arranged at the upper end of the weighing sensor, a supporting frame, an air cylinder or an electric push rod, a grease pipe joint and a grease injection head. The cylinder or the electric push rod is fixed on the upper end plate of the support frame; the upper end of the grease pipe joint is fixed on a piston rod of the cylinder or the electric push rod, and the lower end is detachably sealed and fixed at the upper end of the grease injection head; the grease injection head main body is a circular tube with a blind hole inner cavity; an end cover is arranged at the position, close to the interface, of the upper end part of the circular tube; and more than three oil outlets communicated with the lower end of the inner cavity of the circular pipe are uniformly formed in the side wall of the lower end part of the circular pipe. Waste of grease is avoided, the weight of the CG inner end joint is reduced, the grease does not flow into the center hole of the shaft rod any more, air pressure of inner cavities of the two end joints of the shaft rod is kept balanced, and the grease does not pollute threads of the through hole of the outer end joint any more.

The utility model discloses an anti-blocking type slurry injection device, and relates to the technical field of anti-blocking type slurry injection devices, the anti-blocking type slurry injection device comprises a stirring mechanism, and the bottom of the stirring mechanism is fixedly connected with an extraction mechanism. A top fixing transverse plate is fixed to the middle of the feeding hopper, a middle driving vertical shaft and a top motor body are fixed to the middle of the top fixing transverse plate, a main smashing cutter and an auxiliary smashing cutter are connected to the top of the top fixing transverse plate, and a filtering disc and a middle fixing rod are movably connected to the middle of the top fixing transverse plate. A stirring rod and a stirring plate are fixed to the bottom of a middle driving vertical shaft, raw materials are poured from the top of a feeding hopper, then smashed at the top of an outer cylinder and filtered through a filtering disc to enter the bottom of the outer cylinder, water entering from a water inlet pipe is mixed with the raw materials, and therefore it can be guaranteed that the raw materials are fully screened; and the subsequent stirring injection is not blocked.

The utility model discloses a kind of concrete production quantitative material injection devices, it is related to concrete production field, including support main box, the two side edges of support main box are symmetrically welded with installation side strip, the side edge of support main box is fixedly connected with control panel, the bottom surface of support main box is fixedly connected with discharge valve body, the bottom end of discharge valve body is fixedly connected with drain pipe, the bottom surface of support main box is fixedly provided with solid material bottom block, the bottom end of solid material bottom block is fixedly connected with discharge pipe, the top surface of support main box is provided with storage channel, the inboard of storage channel is horizontally clamped with sealing cover, the top surface of support main box is vertically fixedly connected with top air cylinder, the side edge of support main box is inserted with transmission pipe body, the bottom surface of support main box is provided with bottom through-hole, under adopting integrated structure makes it convenient to install control use, simultaneously in solid-liquid integrated control quantitative feeding structure lets its feeding more efficient and comprehensive.

A rotor manufacturing device includes a sprue configured to be connected to a nozzle of an injection device, gates, and a runner portion connecting the sprue and the gates. The runner portion includes flow passages. Each of the flow passages includes two first portions respectively extending from two of the gates, and a second portion connected to the two first portions and extending from the first portions to an upstream side in a flowing direction of the resin material. In each of the flow passages, at least one of the two first portions is connected to one of two first portions of one of the flow passages that is adjacent in the circumferential direction.

The invention provides a monitoring system and a monitoring method for a micro annular space of an underground cement sheath. The monitoring system comprises a reaction kettle, a first injection device, a second injection device, a third injection device and a monitoring assembly, the interior of the reaction kettle is divided into a confining pressure cavity, a second annular cavity and a first annular cavity, the second annular cavity is arranged around the peripheral side of the first annular cavity, and the confining pressure cavity is arranged around the peripheral side of the second annular cavity. First liquid is injected into the first annular cavity through the first injection device to simulate the temperature and pressure in the casing pipe. Third liquid is injected into the confining pressure cavity through a third injection device, and the temperature and pressure in the stratum are simulated. And cement paste is injected into the second annular cavity through the second injection device to form a cement sheath. And the temperature information and the sound wave information of the cement sheath are monitored through the monitoring assembly, so that the expansion behavior of the micro annular space in the cement sheath in the low-temperature carbon dioxide injection process can be obtained.

We provide die-casting machines that enable shorter cycle times. [Solution] The die-casting machine of the embodiment comprises a fixed die plate, a movable die plate, a fixed mold held by the fixed die plate and including a casting port, a movable mold held by the movable die plate opposite the fixed mold, a closure block in which a portion is inserted into the casting port, a main block that forms a cavity between itself and the fixed mold into which molten metal can be filled, a first actuator that moves the closure block horizontally relative to the main block, a guide rod with one end fixed to the closure block and sliding horizontally relative to the main block, a clamping device that clamps the fixed mold and the movable mold together, and an injection device that fills the cavity with molten metal from the casting port.

The utility model relates to the technical field of mechanical lubricating oil equipment, and provides an oil injection device for machining of a worm and gear speed reducer, the oil injection device comprises a speed reducer box, a transmission shaft is rotatably connected to the interior of the speed reducer box, and an oil injection mechanism is arranged in the speed reducer box. The motor is started while the worm gear and the worm are started, the half gear is meshed with the rack, so that the rack drives the extrusion plate to apply pressure to oil in the oil injection tank, the oil is stressed to be sprayed out through the spraying plate, and lubricating oil is injected into a transmission part of the worm; according to the technical scheme, the rack is driven to reset through the elasticity of the reset spring, so that the oil injection tank stops supplying oil, the oil injection tank indirectly discharges oil through the half gear rotating continuously, lubricating oil is prevented from being accumulated at the first position of the worm, and the technical problem that in the related technology, the worm gear and the worm cannot be continuously lubricated is solved.