47results about How to "Prevent burst" patented technology

This utility model discloses a wooden door for use with a floor spring, including a front panel (1) and a back panel (2). Two vertical beams (3) are provided between the front panel (1) and the back panel (2). An upper horizontal beam (4) and a lower horizontal beam (5) are provided between the front panel (1) and the back panel (2). Multiple reinforcing beams (6) are provided between the front panel (1) and the back panel (2). A limiting beam (7) is provided on the inner side of one of the vertical beams (3). The upper and lower ends of the limiting beam (7) are fixed to the upper horizontal beam (4) and the lower horizontal beam (5) respectively. The front panel (1) and the back panel (2) are both fixed to the limiting beam (7). A tightly fitted iron square tube (8) is provided between the limiting beam (7) and the vertical beam (3). The bottom of the iron square tube (8) is provided with a connecting shaft (9) that passes through the lower horizontal beam (5). The bottom of the connecting shaft (9) is provided with a socket (10) that mates with the floor spring. This utility model has the advantage of a long service life.

The utility model belongs to the technical field of medical instruments, and discloses a puncture guide wire which comprises a puncture body and a rigidity balancing sleeve. The puncture body comprises at least two first puncture sections which are connected in sequence, and in every two adjacent first puncture sections, the diameter of the first puncture section close to the far end of the puncture guide wire is smaller than that of the other first puncture section; the number of the rigidity balance sleeves is at least two, the rigidity balance sleeves correspond to the first puncture sections in a one-to-one mode, the corresponding first puncture sections are fixedly sleeved with the rigidity balance sleeves, and in every two adjacent rigidity balance sleeves, the outer diameter of the rigidity balance sleeve close to the far end of the puncture guide wire is larger than that of the other rigidity balance sleeve. The flexural rigidity of the rigidity balance sleeve close to the far end of the puncture guide wire is larger than that of the other rigidity balance sleeve. Puncture guide wires with different strengths do not need to be replaced repeatedly, so that the operation time is saved, and the operation risk is reduced. And the size of the included angle opening of the U-shaped puncture head cannot be increased along with the feeding of the puncture guide wire, so that the blood vessel is prevented from being burst.

The utility model relates to an explosion-proof motor shell hydraulic pressure test device, and belongs to the technical field of explosion-proof motor production, the explosion-proof motor shell hydraulic pressure test device comprises a base, an upper sealing gasket, a lower sealing gasket and a hydraulic mechanism arranged on the base, the surface of the upper sealing gasket is provided with a water inlet hole, the output end of the hydraulic mechanism is fixedly provided with a pressing block, and the pressing block is provided with a water inlet pipe; the water inlet pipe is communicated with the water inlet hole and externally connected with a pressure system, the surface of the base is concavely provided with a water storage tank, the water storage tank is externally connected with a drainage pipe, sliding rails are symmetrically fixed to the base, supporting tables are symmetrically and slidably connected to the sliding rails, and lower sealing gaskets are arranged on the surfaces of the supporting tables. According to the device, two supporting tables are arranged, when one supporting table moves to the bottom of the hydraulic mechanism for testing, the other supporting table can conduct feeding and discharging actions of a motor shell, the two supporting tables conduct testing alternately, feeding and discharging can be conducted on the other supporting table in the testing process of one motor shell, and therefore uninterrupted testing is achieved; and the test efficiency is improved.

The application relates to the technical field of cooking utensils, in particular to a combustion device and a gas stove. The combustion device comprises a burner, a pot rack which is arranged around the outer side of the burner and is fixed with the burner, the outer periphery of the burner is tightly attached to the pot rack, the pot rack is provided with a heat storage cavity which is open downward and surrounds the burner, a partition plate is installed at the bottom of the pot rack to close the opening of the heat storage cavity, the middle part of the partition plate is provided with a hole position, and the bottom end of the burner is provided with an air inlet part which penetrates into the hole position. The partition plate has a heat insulation function, can effectively isolate the heat generated by the burner from radiating to the panel of the gas stove, reduces the temperature rise of the panel, and avoids scalding or panel explosion. The middle part of the partition plate is provided with a hole position, the bottom end of the burner is provided with an air inlet part which penetrates into the hole position. The above-mentioned arrangement ensures that the partition plate does not hinder the primary air intake of the burner, and ensures the smooth combustion of the burner.

This invention discloses a polysiloxane microsphere, its preparation method, and its application. The polysiloxane microsphere has a D50 particle size of 0.1~10μm; the structural defect ratio S of the polysiloxane microsphere is S=T2 / T3, where S is 0.20~0.70; T2 refers to... 29 The relative abundance of Si NMR chemical shifts in the range of -50 to -60 ppm, T3 refers to... 29 The relative content of SiNMR chemical shifts in the range of -60 to -70 ppm; the low-temperature volatile content W of the polysiloxane microspheres is W = K1 / (K1+K2), where W is 0.027~0.893; K1 is the thermal weight loss ratio at 25℃~200℃, and K2 is the thermal weight loss ratio at 200℃~400℃. This solves the technical problem in the prior art where highly cross-linked polysiloxane microspheres form a dense network during calcination, making it difficult for internal pyrolysis gaseous products to escape and be removed.

The application discloses a battery pack and an electric equipment. The battery pack comprises a lower box body, an upper box cover and a battery pack. The upper box cover and the lower box body are mutually covered to form a containing cavity. The upper box cover is provided with a liquid flow channel and a first through hole in communication with the liquid flow channel. The first through hole is located on a side of the upper box cover away from the lower box body. The first through hole is used for injecting liquid into the liquid flow channel. The battery pack is contained in the containing cavity. The battery pack is provided with an explosion-proof valve. The explosion-proof valve is arranged towards the first through hole. The upper box cover, the battery box body, the battery pack and the electric equipment provided by the application can improve the heat insulation capacity of the upper box cover, improve the heat insulation effect of the upper box cover, and thus improve the use safety of the battery pack.

The utility model relates to a water tank ventilation structure and a dish-washing machine, and belongs to the field of dish-washing machines. The water tank assembly is arranged on the inner container assembly, the water tank assembly is provided with a liquid storage cavity, the water tank assembly is provided with an overflow port communicated with the liquid storage cavity, and the water tank assembly is provided with an overflowing channel communicated with the overflow port; the locking assembly is arranged on the inner container assembly, the locking assembly is used for connecting the inner container assembly and the water tank assembly, the locking assembly is provided with an output port, and the overflowing channel, the output port and the washing cavity are sequentially communicated. According to the water tank ventilation structure, the liquid storage cavity, the overflow opening, the overflowing channel, the output opening and the washing cavity are sequentially communicated, so that compressed air can be conveyed into the washing cavity when liquid is injected into the water tank assembly, and the situation that the water tank assembly bursts due to too large air pressure is avoided.

The application relates to the technical field of valves, in particular to a high-temperature material flow regulating device and a control method thereof, which comprises a device body, a spring hanger fixed on the device body, an inlet and return water system, a control system, a monitoring device and a connecting pipe fixed on a discharge port of the device body. The device is aimed at the problems of poor linearity of traditional gate valves and flap valves, insufficient precision of manual regulation and open-loop control, realizes linear regulation of high-temperature material flow through the curved surface fitting design of a valve head and a valve seat, completely solves the disadvantages of small opening sensitivity and large opening sluggishness, accurately adapts to trace regulation requirements, relies on the monitoring device to collect material level and temperature signals in real time, constructs a closed-loop control through a PLC control system, automatically drives an electric actuator to adjust the position of a valve rod, does not need manual intervention, avoids human judgment errors, eliminates high-temperature scene operation safety hazards, greatly improves flow control precision and stability, and solves the problem of instability of a traditional control loop.

This application relates to a rice steaming bag and cooking device. The rice steaming bag includes a main body and a lid. The main body has an open placement cavity. The main body includes a circumferential surface defining the placement cavity. The circumferential surface includes a sealing layer, a gel layer, and a breathable layer arranged sequentially from the outside to the inside. The sealing layer is made of a sealing material, the gel layer is made of hydrogel, and the breathable layer has vents communicating with the placement cavity. The gel layer is exposed to the placement cavity through the vents. The lid is placed on the main body and covers the open cavity when the lid is closed. The end faces of the main body (excluding the circumferential surface) and / or the end faces of the lid have vents communicating with the outside. This solution can be applied to microgravity environments, such as space, to steam rice in a microgravity environment. Only washed rice grains need to be placed in the rice steaming bag beforehand; no additional water is needed, making the rice steaming process convenient and simple.

The utility model relates to the field of low-voltage electric appliances, in particular to a switch module, which is characterized in that a contact system and an arc extinguishing system are arranged in a module shell; the contact system comprises a moving contact mechanism and a static contact group; each group of arc extinguishing system comprises an arc extinguishing chamber and a buffer chamber which is arranged in the module shell and is arranged side by side with the arc extinguishing chamber along a first direction d1, a plurality of arc extinguishing grid sheets of the arc extinguishing chamber are arranged side by side at intervals, an arc inlet and an exhaust port of the arc extinguishing chamber are oppositely arranged along a third direction d3, the buffer chamber is communicated with the arc inlet of the arc extinguishing chamber, and the buffer chamber is communicated with the exhaust port of the arc extinguishing chamber. The first direction d1 is perpendicular to the third direction d3; the module shell further comprises arc extinguish chamber exhaust windows arranged on the side wall of the module shell, and each arc extinguish chamber is communicated with the external environment through a group of arc extinguish chamber exhaust windows. The switch module is good in safety.

A kind of multi-point temperature measuring structure for all-glass IH heating health-care pot, comprising: all-glass kettle body, base and master unit;First temperature detection unit includes at least three first temperature sensors corresponding to heating area;First temperature sensor is distributed in an asymmetric manner to monitor the temperature of different positions on heating area;Second temperature detection unit includes at least one second temperature sensor corresponding to low temperature area;Second temperature sensor is used to detect the temperature of all-glass kettle body body.Master unit is electrically connected with electromagnetic heating module, first temperature detection unit and second temperature detection unit;Master unit can control electromagnetic heating module to stop power supply or reduce its heating power according to the detection temperature of first temperature detection unit and / or second temperature detection unit.The utility model, this design ensures the fast, accurate response to dry burning, local dry burning and overall overheating and other dangerous working conditions, protects no dead angle, greatly improves the intrinsic safety of product.

The invention relates to the technical field of circuit protection devices, in particular to a double-layer arc-extinguishing flat plate type fuse which comprises an insulating shell, a melt and a composite arc-extinguishing core, the melt is provided with a center fusing area and a terminal area which are integrally formed, and the composite arc-extinguishing core is arranged in the insulating shell and surrounds the center fusing area. A first arc extinguishing cavity for accommodating a gas production material is formed in the first arc extinguishing chamber to form a first arc extinguishing layer; and a second arc extinguishing cavity filled with an arc extinguishing medium is formed between the insulating shell and the composite arc extinguishing core body to form a second arc extinguishing layer. According to the invention, during breaking, high-pressure airflow can be quickly generated to suppress electric arcs in a segmented manner, and continuous cooling and insulation are realized by an external medium, so that the arcing time is greatly shortened, the internal pressure is effectively controlled, the shell is prevented from bursting, and the breaking capacity, safety and reliability of high-voltage and large-current faults are remarkably improved.

The invention relates to the technical field of reactor waste heat removal, in particular to a heat dissipation system and method for an ocean floating nuclear energy platform reactor, and the heat dissipation system comprises a loop subsystem, a natural circulation loop, a steam power generation subsystem and an ocean hot trap; the first loop subsystem comprises a reactor core, a pressure container and a coolant pipeline; the natural circulation loop comprises an intermediate heat exchanger, a seawater circulation pipeline and a waste heat discharge main pipeline, and the intermediate heat exchanger is connected with the loop subsystem through a coolant pipeline and used for discharging waste heat to the outside through natural circulation; the ocean heat trap takes external seawater as a final heat trap and is connected with a seawater circulating pipeline, a residual heat discharge main pipeline and a steam power generation subsystem; through the dual design of vapor-liquid separation and pressurization backflow prevention, the core condition for generating a condensation water hammer is avoided from the source, pipeline burst is effectively prevented, and the operation safety of the reactor heat dissipation system of the marine floating nuclear energy platform is remarkably improved.

This invention relates to the field of power cable technology, specifically to a low-temperature resistant, crack-resistant protective conduit for communication and power cables. It includes a cable body with an inner insulation structure. The insulation structure includes a first positioning ring and a second positioning ring located inside the cable body. The outer wall of the second positioning ring has a heating wire groove, and the inner side of the heating wire groove has a heating wire body. An installation head is fixedly connected to the outer wall of the second positioning ring, and a connecting post is fixedly connected between the installation heads. The side wall of the connecting post has a wire-passing groove. The venting structure includes a venting ring fixedly fitted around the outer ring of the cable body, and multiple venting pipes are fixedly connected to the outer wall of the venting ring. This invention provides a low-temperature resistant, crack-resistant protective conduit for communication and power cables, which has the advantages of heating and insulation in low-temperature environments, automatic venting, and high overall cable stability and compressive strength.

This utility model discloses a welding seam positioning structure for a pipe bending machine, including a frame with a conveying channel, a material storage mechanism near the inlet end of the conveying channel, a blocking device near the outlet end of the conveying channel, a rotating device for adjusting the angle of the metal pipe, and a color difference detector for detecting the position of the metal. The rotating device clamps the metal pipe and drives it to rotate, while the color difference detector detects the color difference of the position of the metal pipe. Using silver as the reference color, when the metal pipe rotates a certain angle, the color difference detector detects black, which is the position of the weld. At this time, the rotating device stops. The characteristic of color difference is used for precise positioning to avoid the weld from cracking due to bending.

This utility model discloses an explosion-proof and flame-retardant liquid-cooled high-voltage automotive cable and its cable sheathing equipment. The cable includes a liquid-cooling pipe, a bare copper conductor, a wrapping layer, an explosion-proof tin-plated braided copper mesh, and a polyolefin insulation layer; the liquid-cooling pipe is located in the center of the cable. The cable sheathing equipment is a screw extruder, and the extrusion die is a double-layer die, including an inner die tube and an outer die tube. This utility model can effectively improve the cooling efficiency of the cable by setting up the liquid-cooling pipe, reducing the risk of fire caused by cable overload during the operation of electric vehicles, and improving the safety of electric vehicle operation. The cable sheathing equipment provided by this utility model, through the setting of the double-layer extrusion die, can effectively reduce the risk of compression deformation of the liquid-cooling pipe during the extrusion operation, ensuring the cooling efficiency of the cable.

The present application relates to a kind of intermediate joints for flexible composite pipe, including two inner core pipes, two outer sleeve pipes and composite pipe between inner core pipe and outer sleeve pipe, one end of the outer sleeve pipe is threadedly connected with connecting piece, the connecting piece includes connecting pipe, sealing assembly is arranged in the connecting pipe, the outer sleeve pipe is fixedly provided with engagement assembly, exhaust assembly is also provided on the connecting pipe, the sealing assembly is used to seal the junction of outer sleeve pipe and connecting pipe under the cooperation of engagement assembly when gas leaks, the exhaust assembly is used to discharge a large amount of leaked gas, prevent the pipe body from bursting due to too much gas in the pipe, improve the sealing between outer sleeve pipe and connecting piece, solve the problem that the original outer sleeve pipe and connecting piece need to be welded, so that the welding part is corroded due to long-term use and the sealing of the welding part is poor.

The utility model relates to the technical field of ball mills, in particular to a ball milling tank of a ball mill, which comprises a sound insulation cover, the upper end of the sound insulation cover is covered with a sound insulation cover, the ball milling tank is slidably sleeved in the sound insulation cover, the outer wall of the ball milling tank is adhered and fixed with the inner wall surface of the sound insulation cover through resin glue, and the upper end of the ball milling tank is covered with a cover plate. When materials need to be subjected to ball-milling machining through the ball-milling tank, the materials and milling balls are put into the ball-milling tank, then the cover plate covers the ball-milling tank to achieve sealing, then the sound insulation cover and the sound insulation cover are installed in a covering mode, at the moment, the threaded column and the built-in sleeve are arranged in a penetrating mode, and positioning butt joint of the sound insulation cover and the sound insulation cover can be achieved; the sound insulation cover and the sound insulation cover can be fixed through mutual threaded butt joint of the threaded cap and the threaded column, the threaded rod can be rotated through the handle, so that the threaded rod and the threaded sleeve mutually move in a threaded mode, and therefore the extrusion plate can extrude and fasten the cover plate and the ball milling tank.

The utility model relates to steel pipe technical field, concretely is a seamless steel tube with pressure -relief structure, the rear end fixed setting ring seat of seamless steel pipe body, the inside of ring seat is equipped with annular groove, annular cylinder inserts to the inside of seamless steel pipe body, the rear end fixed setting ring frame of annular cylinder, ring frame inserts to the inside with annular groove screw thread connection of groove, the front end of annular cylinder is flush with the front end of seamless steel pipe body, this structure integrates pressure -relief structure in seamless steel pipe body, through the cooperation of ring frame, locating seat, spring and pressure -relief block, realizes the instantaneous response when water pressure mutation, when pressure exceeds threshold value, pressure -relief block compression spring expands the inside diameter pressure relief, avoids the plastic deformation or burst of steel pipe because of instantaneous overpressure, improves the operation safety of boiler system from the body structure level.

The application discloses a spunlace non-woven fabric roll packaging control method and system and related devices, and belongs to the technical field of control. A control terminal obtains a current roll diameter value and a current wound length value of a fabric roll during winding and determines a current winding amount. When the winding amount reaches first and second winding amount thresholds in sequence, winding deceleration and pre-sending film, winding stop actions are triggered respectively. A roll diameter recovery increment value generated by the fabric roll due to tension release is obtained within a first preset stationary period after winding stops. Only when the recovery increment value is within a preset reference interval, fabric width cutting and packaging film winding are executed, so that the packaging trigger timing is matched with the actual rebound stable state of the fabric roll. The application effectively solves the problems of packaging meter deviation and poor packaging film adaptability of spunlace non-woven fabric caused by the characteristics of loft, compressibility and rebound, and significantly improves the packaging precision and consistency.

The utility model relates to the technical field of filter bags, and discloses a multifunctional filter bag which comprises a pipeline and a filter bag body sleeved on the pipeline, a flange is arranged at the end part of the pipeline, the filter bag body is sleeved on the flange, and a mounting piece which is propped against the flange to fix the filter bag body is arranged on the pipeline in a threaded connection manner; the mounting piece is provided with a limiting piece which is connected to the outer side of the filter bag body in a sleeving manner; and a screen cylinder sleeving the outer side of the limiting piece is arranged on the mounting piece. Compared with the prior art, the filter bag has the advantages that the filter bag body can be supported, so that dust is placed between the arc-shaped rods, and the cleaning period of the filter bag is prolonged.

The utility model discloses a bottle cap airtightness detection assembly, which relates to the technical field of bottle cap detection and comprises a supporting seat B. A plurality of sliding sleeves are fixed on the supporting seat B. Guide rods capable of sliding up and down are installed in the sliding sleeves respectively, and air nozzles communicated with the guide rods are arranged at the upper ends of the guide rods. A bearing table used for bearing the bottle cap is further arranged on the air tap or the guide rod. The guide rod is further sleeved with a spring, and the two ends of the spring abut against the bearing table and the supporting base B respectively. When the bottle cap is inserted into the air tap, buffering can be achieved, the bottle cap is effectively prevented from being broken by the air tap, and the quality of the bottle cap is guaranteed.

The utility model discloses a mold backwater collecting and conveying device which comprises a mold backwater main pipe, a water collecting assembly and a plurality of mold backwater branch pipes. One end of the mold water return branch pipe is connected with a cooling runner water return connector of the mold, the other end of the mold water return branch pipe is connected with the mold water return main pipe through a water collecting tank, and a water conveying assembly is arranged between the water collecting tank and the mold water return main pipe and used for conveying cooling water of the water collecting tank to the mold water return main pipe; each mold water return branch pipe is provided with a flow adjusting assembly and a temperature sensor, and the temperature sensors are electrically connected with the flow adjusting assemblies. According to the utility model, under the condition that the cooling effect of the mold is not influenced, the mold water return branch pipes intensively flow into the water collecting tank, and the flow is automatically adjusted according to the temperature to prevent over-high temperature, so that the mold water return branch pipes can be prevented from bursting due to increased pressure or over-high temperature, the cooling water stably flows to the mold water return main pipe, the production efficiency is ensured, and the production cost is reduced. The die service life is prolonged.

The application provides a method for removing photoresist on a wafer and a semiconductor process device. In a process for removing photoresist after ion implantation, the spectrum intensity of the emission light generated by a specific element in the chamber at different sampling moments is obtained; the change characteristic quantity of the spectrum intensity at each sampling moment is determined according to the spectrum intensity corresponding to two adjacent sampling moments; when the change characteristic quantity corresponding to the current sampling moment meets a preset condition, it is determined that the hardening layer removal process is close to the end point, and the wafer is controlled to descend from the current position to the direction of the heating base according to a preset relationship to remove the hardening layer of the photoresist. By obtaining the spectrum intensity of the emission light generated by the specific element, whether the hardening layer removal process is close to the end point is determined according to whether the change characteristic quantity of the spectrum intensity meets the preset condition, and the wafer is controlled to descend for heating only when the hardening layer removal process is close to the end point, so that the hardening layer is prevented from bursting at high temperature.

The utility model relates to the technical field of toughened glass with a silencing function, solves the technical problem of poor sound insulation effect of toughened glass, and particularly relates to toughened glass with a silencing function, which comprises a front fixed plate frame and a rear fixed plate frame which are symmetrical to each other and serve as supporting foundations. A glass interlayer assembly for improving the strength of the tempered glass is arranged between the front fixing plate frame and the rear fixing plate frame, a hollow sound insulation assembly for improving the sound insulation capacity is arranged on the inner side of the glass interlayer assembly, and the hollow sound insulation assembly comprises a sound insulation glass layer arranged on the inner side of the glass interlayer assembly. Due to the arrangement of the hollow sound insulation component, the sound insulation effect of the toughened glass can be improved, and the transmission path of noise is cut off through the hollow sound insulation layer, so that the noise is cut off on a sound transmission medium, and the hollow layer can be extracted more conveniently during the production period of the toughened glass.

The utility model provides a structure optimizing device for a line pressing ridge die, particularly relates to the technical field of line pressing machines, and aims to solve the technical problems that a paper board is in point contact with a roller, so that the stress area is small, and the folding of the paper board is affected badly. The wire pressing machine comprises an upper die body connected with a wire pressing machine body, a long-strip-shaped wire pressing tool bit is arranged on the bottom face of the upper die body, a lower die body fixedly connected with the wire pressing machine body is arranged below the upper die body, and a working space is formed between the upper die body and the lower die body. The front end of the line pressing tool bit is arranged on the side, where a paperboard enters the working space, of the upper die body, the tail end of the line pressing tool bit is arranged on the side, where the paperboard retreats from the working space, of the upper die body, and a groove matched with the line pressing tool bit is formed in the top face of the lower die body. According to the device, the long-strip-shaped line pressing tool bit is used for pressing lines, the stress area is increased from one point to one line, the adverse effect on the folding strength is reduced, and paperboard bursting is avoided.

The invention discloses compression molding equipment and method for building energy-saving glass, and the method comprises the following steps: in a heating stage, adopting model prediction control to dynamically adjust the heating power, so as to minimize the temperature difference between the surface and the core part of a glass blank and enable the glass blank to accurately reach the temperature corresponding to the target viscosity at the target time; in the pressurization stage, the glass viscosity is inversed in real time based on the initial contact pressure and the flow speed, and the pressure is calculated and adjusted in real time in combination with the mold flow resistance function changing along with the filling volume and the remaining filling time; in the cooling stage, an initial residual stress field is rapidly calculated based on the final pressure, temperature distribution and a viscoelastic model, and the safe cooling rate is dynamically decided according to the maximum tensile stress, the product thickness and the shape complexity. The equipment comprises a rack mold closing mechanism, a mold unit, a heating unit, a pressurizing unit, a cooling unit and a control unit.

The utility model relates to a fuse, and specifically relates to a melt structure and a fuse with high arc extinguishing capability. Comprising two connecting pieces used for being connected with conductive terminals of the fuse, a plurality of connecting parts and a plurality of fusing parts. The plurality of fusing parts and the plurality of connecting parts are sequentially and alternately connected to form a fuse body, and two ends of the fuse body are respectively connected with the two connecting pieces; protective plates are arranged on the upper surface and the lower surface of the fusing part; a gap is reserved between the protection plate and the fusing part, and the gap is filled with an arc extinguishing medium. According to the utility model, an unextinguished electric arc is blocked through the protection plate, the spraying direction of the electric arc is changed, and the transmission path of the electric arc between the protection plate and the fusing part is changed, so that the energy of the electric arc is continuously weakened in the transmission process, the impact strength of the electric arc on the wall of the ceramic tube of the fuse is greatly reduced, and the ceramic tube is prevented from being broken.

The utility model relates to the technical field of diesel oil injectors, in particular to a needle-valve-free prepressing spring diesel oil injector which comprises a diesel oil injector body and an oil inlet pipe connector arranged on the diesel oil injector body, an oil duct is arranged in the oil inlet pipe connector, an inner limiting ring is fixedly installed on the cavity wall of the rear end portion of the oil duct, and the inner limiting ring is of an annular structure. An oil channel is formed in the oil tank, an inner filter element cylinder is inserted into the oil channel in a matched mode, an oil liquid channel arranged in the length direction of the inner filter element cylinder is formed in the inner filter element cylinder, a center mesh reinforcing cylinder is fixedly installed on the inner wall of the oil liquid channel, oil liquid filter screens are fixedly installed on the two end faces of the center mesh reinforcing cylinder, and the center mesh reinforcing cylinder and the oil liquid filter screens are both in a wavy shape. The engine is provided with a filtering structure, replacement operation is facilitated, and the effects of protecting the engine and prolonging the service life of the engine are achieved.

The application discloses polysiloxane microspheres, a preparation method and application thereof, the D50 particle size of the polysiloxane microspheres is 0.1-10 mu m, the structure defect ratio S of the polysiloxane microspheres is S=T2 / T3, S is 0.20-0.70, T2 refers to 29 The relative content of Si NMR chemical shift in the range of-50 to-60 ppm, T3 refers to 29 The relative content of Si NMR chemical shift in the range of-60 to-70 ppm, the low-temperature volatile fraction ratio W of the polysiloxane microspheres is W=K1 / (K1+K2), W is 0.027-0.893, K1 is a thermal weight loss ratio at 25 DEG C-200 DEG C, and K2 is a thermal weight loss ratio at 200 DEG C-400 DEG C. The technical problem that internal pyrolysis gaseous products are difficult to escape and difficult to remove when high-crosslinking-degree polysiloxane microspheres in the prior art form a dense network during calcination is solved.