222 results about "Mechanical pressure" patented technology

The invention belongs to the technical field of metal additive manufacturing post-processing, and relates to a method for achieving crack closing of a tungsten component prepared through SLM based on SPS. The method mainly comprises the following steps that S1, a tungsten component is prepared, specifically, a pure tungsten component is prepared through a selective laser melting (SLM) technology; s2, the SLM forming component is subjected to surface cleaning and support removing treatment, and after it is ensured that no powder residues exist, accurate positioning and placing treatment is conducted; and S3, SPS treatment process: putting the graphite mold treated in the step S2 into SPS equipment for sintering treatment. Through the combined action of high temperature and mechanical pressure, inevitable microcracks in the SLM pure tungsten component are effectively closed, and the compactness and integrity of the component are remarkably improved.

The invention relates to the technical field of photovoltaic film detection, in particular to photovoltaic film performance detection equipment which comprises a spectrophotometer with an integrating sphere accessory, the integrating sphere accessory is mounted in a sample bin of the spectrophotometer, and a mounting mechanism and a wrinkle generator are further mounted in the sample bin. The wrinkle generator comprises a jacking head for applying local mechanical pressure to the photovoltaic film and an L-shaped jacking rod for applying non-uniform mechanical tension, the wrinkle generator further comprises a transmission part, and the jacking head and the L-shaped jacking rod alternately extend out in the front-back direction under the transmission action of the transmission part so that different wrinkles can be generated on the surface of the photovoltaic film; the light transmittance of the photovoltaic film with different inclination degrees and different wrinkle conditions is detected through the spectrophotometer with the integrating sphere accessory, the method is more suitable for the actual use state of the photovoltaic film, the detection result is more accurate, and more reliable basis is provided for performance evaluation of the photovoltaic film.

The invention discloses a mechanical pressure compensation device and method for a weightlessness scale. The mechanical pressure compensation device comprises the weightlessness scale, a receiving reaction kettle, a weightlessness scale discharging pipe and an air pressure sealing valve. A weightlessness scale feed port is formed in the top of the weightlessness scale, a weightlessness scale discharge port connecting flange is arranged at the bottom of the weightlessness scale, a receiving reaction kettle feed port is formed in the receiving reaction kettle, and a receiving reaction kettle feed port connecting flange is arranged at the receiving reaction kettle feed port; one end of a weightlessness scale discharging pipe is fixedly connected to a weightlessness scale discharging port connecting flange at the bottom of the weightlessness scale, and the other end of the weightlessness scale discharging pipe penetrates through a receiving reaction kettle feeding port connecting flange to be connected to the interior of a receiving reaction kettle feeding port of the receiving reaction kettle; a radial gap is formed between the outer wall of the weightlessness scale discharging pipe and the inner hole of the receiving reaction kettle feeding hole; and a discharging flexible connector is hermetically connected between the weightlessness scale discharging hole connecting flange and the receiving reaction kettle feeding hole connecting flange. Compensation of pressure fluctuation in the reaction kettle is achieved, and the material conveying stability and weighing accuracy of the weightlessness scale are improved.

The invention discloses a chip mounting device for circuit board processing, and relates to the technical field of circuit board processing, and the chip mounting device comprises a conveying device, the bottom of the conveying device is fixedly provided with supporting legs, the front part of the conveying device is provided with a motor, the top of the conveying device is fixedly provided with a fixing frame, and the bottom of the fixing frame is provided with a lifting device. The bottom of the lifting device is provided with a chip mounting device, the top of the conveying device is provided with a clamping device, a protection device and a pushing device, clamping plates move to make contact with and clamp a circuit board, the circuit board is fixed to a workbench of the chip mounting device, and the circuit board is prevented from moving or deforming in the chip mounting or welding process; according to the invention, components can be accurately mounted at specified positions, errors are reduced, the circuit board is effectively prevented from warping due to temperature change or mechanical pressure, the circuit board is kept flat, and the mounting problem caused by warping is avoided.

The invention discloses a threaded nylon explosion-proof pressure-relief waterproof breathable connector which comprises a connector shell, a mounting ring is fixedly connected in the connector shell, the mounting ring is slidably connected with a breathable base, the breathable base is bonded with a breathable film, the breathable base is detachably connected with a gland, the breathable base is sleeved with a pressure spring, and the pressure spring is fixedly connected with the connector shell. The end portion of the ventilation base is detachably connected with an end face elastic buckle, the two ends of the compression spring are fixedly connected with the end face elastic buckle and the installation ring respectively, and the connector shell is provided with an extrusion structure. According to the invention, dual channels of normal micro ventilation of the breathable film and mechanical pressure relief driven by the spring are integrated. Under normal pressure difference, gas is exchanged through the gas-permeable membrane to keep pressure balance and prevent water and dust; when the internal pressure rises suddenly, the air pressure can push the ventilation base to compress the spring, so that the spring is separated from the O-shaped sealing ring, a larger pressure relief channel is opened up instantly, the explosion-proof response is sensitive, and the safety guarantee is more comprehensive.

The large-flow low-pressure mechanical pressure reducing valve comprises a valve body shell, an electromagnetic fixed valve element, a movable valve element and an input body, the input body is provided with three openings, the opening in the right side of the input body is an input opening, the opening in the lower end of the input body is an output opening, the opening in the upper end of the input body is a control opening, and the control opening is communicated with the valve body shell. The electromagnetic fixed valve element and the movable valve element are both arranged in the valve body shell, when the electromagnetic fixed valve element is in a power-off state, the lower end of the movable valve element is inserted into the output port to close the output port, and when the electromagnetic fixed valve element operates, the movable valve element moves upwards under the action of electromagnetic force so that the output port can be opened. The movable valve element is driven by the electromagnetic fixed valve element to move so as to control opening and closing of the output port, the operation stroke of the movable valve element is guaranteed, and the opening area of the output port meets the requirement. The large-flow low-pressure mechanical pressure reducing valve provided by the utility model has the advantages that the air outlet pressure and flow are improved, so that the use effect of a naturally aspirated large-displacement engine is met.

The utility model relates to the technical field of hydraulic cylinders, in particular to a high-precision mechanical electric locking oil cylinder which comprises a cylinder barrel and a piston rod, the piston rod is inserted into the cylinder barrel and is in sliding fit with the cylinder barrel in the axial direction of the cylinder barrel, and the piston rod is hollow; the nut is connected to the end, located in the cylinder barrel, of the piston rod. The screw rod is inserted into the piston rod, the screw rod is in running fit with the nut, and the screw rod is hollow; the rocker is rotationally arranged in the cylinder barrel, and the rocker is inserted in the screw rod and is in sliding fit with the screw rod in the axial direction of the cylinder barrel; the driving device is arranged at the bottom of the cylinder barrel and used for driving the rocker to rotate; and the sensor assembly is used for oil pressure of the rodless cavity in the cylinder barrel, and the sensor assembly is electrically connected with the driving device. When a hydraulic system loses efficacy, the oil cylinder can automatically carry out mechanical pressure maintaining by monitoring the pressure change of the cavity in real time, and therefore it is guaranteed that the whole filter pressing period is completely carried out.

The application discloses a flexible strain sensor, a preparation method and a deep-sea equipment structure health monitoring system. The flexible strain sensor comprises a flexible packaging layer, a composite conductive network structure packaged in the flexible packaging layer, at least one first conductive layer and at least one second conductive layer, wherein the first conductive layer is a conductive layer with a compact connection structure after mechanical pressure treatment, the second conductive layer is a conductive layer with a loose stacking structure without mechanical pressure treatment, and a conductive part electrically connected with the composite conductive network structure and led out. The application realizes the unity of ultrahigh strain sensitivity and high signal stability through the synergistic mechanism of macroscopic cracks and network microcracks generated by the two types of conductive layers under strain, and simultaneously endows the sensor with excellent flexibility and conformal attachment capability, so that the sensor can accurately collect the small strain signals on the surface of the deep-sea equipment structure and is suitable for the monitoring of the health of the deep-sea equipment structure.

The embodiment of the utility model provides an intelligent adjusting structure system for a pressure reducing valve, and relates to the technical field of fluid conveying, the intelligent adjusting structure system comprises an adjusting structure and an electrical control system, the adjusting structure comprises a pressure reducing valve body, a pressure gauge is installed on one side of the pressure reducing valve body, and a fixing support is fixedly installed on the top face of the pressure reducing valve body; a motor is installed on the top face of the fixing support and connected with the pressure reducing valve body through a coupler. Through transformation of a traditional mechanical pressure reducing valve and application of an intelligent control technology, the problem that the pressure reducing valve cannot be intelligently adjusted is solved; the system mainly comprises a pressure reducing valve, a motor, a pressure gauge, a programmable controller, a wireless transmission terminal, a relay, an electrical control basic element and the like, has the advantages of convenience in transformation, low cost, high automation degree and the like, and can be fully applied to the pressure reducing valve of fluid in the fields of water conservancy, agriculture, municipal administration, environmental protection, chemical industry, fuel gas and the like to realize intelligent control and adjustment.

The invention belongs to the technical field of tin alloy target material pouring, particularly relates to a tin alloy target material pouring method and equipment for inhibiting shrinkage cavity and composition segregation, and provides the following scheme aiming at the core problems of volume shrinkage and composition segregation during solidification, easy target material shrinkage cavity, shrinkage porosity and nonuniform composition in tin alloy pouring: a vacuum induction melting furnace is adopted; a feeding box is arranged at the top end of the vacuum induction melting furnace, an out-furnace pipeline is fixedly connected to the outer side of the vacuum induction melting furnace, and an external furnace is arranged at the bottom end of the out-furnace pipeline. The tin alloy target material pouring method and equipment for inhibiting shrinkage cavities and composition segregation have the advantages that the pressure sealing cake applies constant low-pressure mechanical pressure to melt in the mold, the melt is forced to continuously shrink and feed in the solidification process, gaps formed by volume shrinkage are directly filled, shrinkage cavities and shrinkage porosity are reduced to the maximum extent, and the casting quality of the tin alloy target material is improved. And the use effect of the internal density of the target is improved.

The utility model discloses a box-type printing-down machine, and relates to the technical field of printing-down machines. The rear side end of the containing frame penetrates through the front side wall of the box body and extends to the inner side of the box body, an upper overturning plate is arranged on the inner side of the box body, a plurality of lamp tubes are arranged at the lower end of the upper overturning plate, the lamp tubes are located above the containing frame, a limiting pressing mechanism is arranged on the inner side of the containing frame, and the limiting pressing mechanism comprises a supporting plate and a lower overturning plate. The lower overturning plate is provided with an irradiation window, and a glass plate is arranged between the lower overturning plate and the supporting plate. During clamping, the abutting springs are always in a compressed state, and enough supporting force can be provided for the supporting plate under the action of the abutting springs, so that tight attachment of a pattern and the photosensitive plate is ensured; according to the device, a mechanical pressure pattern is tightly attached to the photosensitive plate, a vacuum system is not needed, the equipment complexity and maintenance cost are reduced, the vacuumizing time is shortened, and the printing-down speed is increased.

The invention relates to the technical field of mechanical pressure gauge accessory production equipment, in particular to cold punching and stretching equipment for mechanical pressure gauge accessories. A cold punching table is constructed on a fixed base, an air cylinder body is arranged in the middle of the cold punching table to drive a pushing plate to drive a bottom die assembly to conduct reciprocating forming, a forming power source and a bottom die bearing form a directly-connected stress path, and displacement accumulative errors and working condition fluctuation introduced in the middle transmission link are reduced; meanwhile, a punching assembly composed of a height frame, a sliding rod and a lifting table is arranged on one side of the cold punching table, the lifting table is guided and restrained through the sliding rod, the top die assembly keeps a more stable movement track in the downward pressing and return stroke process, the deflection and clamping stagnation probability of the top die relative to the bottom die is reduced, and the production efficiency is improved. Therefore, the matching state of the top die and the bottom die is easier to maintain; and the demolding assemblies are arranged on the two sides of the bottom mold table, so that the separation process of the formed workpieces is controlled, and the stability and batch consistency of cold punching and stretching operation of the mechanical pressure gauge accessories are improved.

The application discloses a power cable stripping device and belongs to the technical field of power construction tools. The stripping device comprises a guide frame, a stripping frame, a driving motor, a screw rod and a pressure sensing and stripping mechanism. During operation, the driving motor synchronously drives the upper die and the lower die in the guide frame to move towards each other through a gear and toothed plate linkage mechanism, clamps and lifts the cable, and ensures that the cable is parallelly fed into the stripping station. In the stripping frame, the rotating screw rod drives the lifting seat to press down, and the cutting disc contacts the cable. The pressure sensing mechanism extrudes the elastic pad block with the pressure sensor inside through the pressing block, converts the mechanical pressure into an electrical signal in real time, and transmits the electrical signal to the PLC processor, so that the accurate monitoring and regulation of the cutting pressure are realized. The application ensures smooth feeding through mechanical linkage, realizes accurate control of the cutting depth by using pressure feedback, effectively avoids the problems of repeated operation or damage to the conductor caused by too shallow or too deep cutting in the traditional stripping process, and improves the efficiency and safety of the stripping operation.

The utility model provides a kind of instrument hairspring placing table, it is related to instrument hairspring placing table technical field, including operation platform, the operation platform top is equipped with placing base and moving base, multiple placing grooves are opened in the placing base, each placing groove is equipped with positioning assembly, moving base is connected support column by moving assembly, the support column front side is equipped with first electric push rod, the output end of first electric push rod is connected fixed base, by the design of positioning assembly, utilize the cooperation of inner pile positioning seat and outer pile positioning seat electromagnet adsorption fixed hairspring two ends, can realize the stable fixation of inner pile and outer pile of hairspring under the premise of not exerting mechanical pressure, effectively avoid the hairspring distortion or damage caused by traditional clamping mode, ensure that plane vortex circle is detected in natural unfolding state, provide reliable basis for accurate analysis of hairspring deformation.

An apparatus and method for joining pipes includes a plate for melting mating surfaces of the pipes to be joined. Additionally, the apparatus utilizes a vacuum in order to push the first and second pipes together in lieu of hand or mechanical pressure which may be inconsistent. Additionally, the vacuum allows the pipes to be joined to settle on each other in order to create a pressure about a periphery of the end of the pipe being joined to the other pipe. The consistent pressure creates a very strong joint between the first and second pipes.

This application relates to an embedded RFID tag packaging device and its packaging process, belonging to the field of radio frequency identification tag manufacturing technology. It includes: a base fixing support for supporting the main body of the device; a turntable sorting module disposed on the main body of the device for conveying and positioning the substrate to be packaged; a dual-mode pressure control unit for acquiring the material characteristics of the substrate and controlling the device to switch between contact pressing and non-contact suspension modes to apply packaging pressure; and a thermal coupling compensation mechanism disposed at the packaging station for temperature regulation of the packaging interface and precise displacement compensation combined with piezoelectric drive. This application utilizes the cooperation of the dual-mode pressure control unit and data acquisition sensors to obtain the substrate hardness in real time using piezoelectric detection technology and switches the execution mode accordingly. For hard substrates such as metals, the device adopts a contact pressing mode to output sufficient mechanical pressure to ensure uniform adhesive layer spreading and bonding strength.

The present application relates to the technical field of hydraulic pump, particularly relates to a plunger pump. The plunger pump comprises a motor, a pump body, a rotating shaft assembly, a piston assembly and a pressure relief assembly. The rotating shaft assembly comprises a rotating shaft, a cam and a booster block. The cam and the booster block are sleeved on the rotating shaft. The plunger pump has a booster position and a pressure relief position. In the booster position, the motor drives the rotating shaft to rotate forward, the cam is unlocked in the circumferential direction from the rotating shaft, and the booster block is locked in the circumferential direction on the rotating shaft. In the pressure relief position, the motor drives the rotating shaft to rotate reversely, the cam is locked in the circumferential direction on the rotating shaft, and the booster block is unlocked in the circumferential direction from the rotating shaft. The piston assembly comprises a piston cylinder and a piston rod. The end of the piston rod, which extends out of the piston cylinder, is in contact with the booster block. The pressure relief assembly comprises a pressure relief cylinder, a pressure relief rod and a reset member. When the rotating shaft rotates reversely, the cam drives the pressure relief rod to move in the axial direction against the elastic force of the reset member, so as to open the pressure relief port. The present application adopts mechanical pressure relief. The parts are stable and reliable under high pressure and are not easy to be damaged.

The application relates to the technical field of energy storage devices, and discloses a multifunctional energy storage device for a house car and an operating method, which comprises a protection box, a working cavity is arranged in the protection box, a protection rod is arranged on the inner wall of the protection box, the outer wall of the protection rod is rotationally connected with the inner wall of a protection cover, a protection groove for rotating a supporting assembly is arranged at the bottom of the protection cover, heat dissipation holes provided with filter screens are arranged on the two sides of the protection box, the outer wall of the heat dissipation holes is obliquely provided with a flow guide plate, the bottom wall in the working cavity is fixedly connected with the bottom end of the supporting assembly, the number of the supporting assemblies is four, a battery body is arranged on the top of each of the four supporting assemblies, a battery electrode column is arranged on the top of each of the four battery bodies, the transmission group is controlled by the conversion assembly, and the transmission group cooperatively moves with the rotating assembly; the conversion of the parallel connection and the series connection of the battery group is completed through mechanical pressure, and the conversion work of the energy storage device can be more conveniently completed.

This application relates to a rotational sensor for an injection device, and more particularly to a rotational sensor for an injection device, the rotational sensor comprising: - a rotatable element configured for mechanical engagement with a ratchet mechanism, the rotatable element including an outer rim and a hub and configured to transmit torque between the outer rim and the hub; - at least one sensor attached to the rotatable element and configured to measure at least one of mechanical force, mechanical pressure, or mechanical strain at a portion of the rotatable element during rotation of the rotatable element; - a processor connected to the at least one sensor and configured to calculate a rotation angle of the rotatable element based on the sensor output of the at least one sensor.

MLG (Multilayer Graphene) device layer structure is connected by vias. The structure includes an M1 MLG interconnect device layer on a dielectric layer. An interlayer dielectric separates the M1 MLG interconnect device layer. An M2 MLG interconnect device layer lies on the interlayer dielectric. Metal vias penetrate the M2 MLG interconnect device layer, the interlayer dielectric, and the M1 MLG interconnect device layer, forming edge contacts across the thickness of the M1 and M2 MLG layers. The MLG layer is formed by depositing MLG on a dielectric or metal layer by applying mechanical pressure at a diffusion temperature to diffuse carbon from a solid-phase graphene precursor through a catalyst layer.

The invention relates to the technical field of liquefied natural gas filling, and discloses marine LNG fuel filling equipment which is used for solving the problem that after filling, residual LNG in a metal braided hose is gasified, high pressure is caused, and safety accidents are caused by blind disassembly of a flange. The device comprises a liquefied natural gas filling gun, a metal braided hose, a straight pipe and a low-temperature valve, and is characterized in that a round cover and a mechanical pressure linkage locking mechanism are additionally arranged. The round cover sleeves the joint of the second flange and the fourth flange, the pipe barrel is fixed outside the straight pipe, and the inside of the barrel is communicated with a pipeline through a small hole. When the pressure in the hose rises, gas pushes a piston in a pipe barrel to compress a spring, a positioning rod is inserted into an insertion rod positioning hole of a round cover, the round cover is automatically locked to cover a flange face, and disassembly is physically prevented; after the pressure is released, the spring resets, and locking is relieved. Automatic protection of pressure locking and non-pressure dismounting is achieved through a pure mechanical structure, manual pressure judgment is not needed, and safety and reliability are remarkably improved.

The application provides an electronic ophthalmic endoscope, and belongs to the technical field of endoscopes. The electronic ophthalmic endoscope can effectively observe the posterior region of an eyeball. The electronic ophthalmic endoscope comprises a handle, an insertion part arranged at the front of the handle, and a camera module. The insertion part is curved into an arc shape as a whole, the curvature of the arc shape is matched with the outer contour of the eyeball, and the cross section of the insertion part is flat. The arc-shaped insertion part can enter along the surface of the eyeball in a ring shape during use, so that the front end can reach the posterior region of the eyeball. A light guide fiber delivers light emitted by a light source to the head end part, illuminates the observation part, and clearly and timely visually observes the posterior region of the eyeball and the running path through the camera module. Compared with a cylindrical structure, the electronic ophthalmic endoscope can effectively reduce the height of the support from the surrounding tissue of the eyeball, reduce the mechanical pressure on the sclera and the adjacent soft tissue, and improve the operation safety and the comfort of the patient under the same functional size.

The invention relates to a micromechanical pressure sensor (100), comprising a substrate (110) having a layer system (120) arranged thereon. The micromechanical pressure sensor (100) further comprises a sensor structure (200) fixed to the layer system (120) in a self-supporting manner by means of at least one suspension structure (140), the sensor structure has a first membrane structure (210), a second membrane structure (220) and a cavity region (240) which is arranged between the two membrane structures (210, 220) and which is closed by a side wall (230) extending in an edge region (212, 222) of the two membrane structures (210, 220). In this case, the sensor structure (200) comprises an effective capacitor (250), which is arranged in the cavity region (240) between the two diaphragm structures (210, 220), the active capacitor has a first electrode (251) fixed to the first membrane structure (210) and a second electrode (253) arranged between the first electrode (251) and the second membrane structure (220) and fixed to the second membrane structure (220).

The water heating pipe fitting splicing device is composed of a pipe fitting body, a connector and pressure rings, the connector is inserted into the inner wall of the pipe fitting body in an interference fit mode to ensure initial positioning firmness, the two slidable pressure rings are arranged on the outer side of the pipe fitting in a sleeved mode and located on the two sides of the connecting position respectively, a driving handle is driven by an operating handle, and the pressure rings are driven by the driving handle. The pressure ring is pushed to move towards the middle, when the pressure ring is pressed, the pipe fitting body can be tightly pressed on the connector, reliable sealing is formed, a plurality of annular grooves are designed in the surface of the connector, pipe fitting materials can be embedded into the grooves in the pressing process, the sealing performance is improved, loosening is prevented, and the whole device is easy to operate and high in practicability. Rapid splicing of pipe fittings can be completed only by pulling the driving handle, no extra tool is needed, the design is particularly suitable for field installation, permanent sealing connection is achieved through mechanical pressure, inconvenience of traditional welding or threaded connection is avoided, the connection strength is guaranteed, and the construction efficiency is improved.

This invention belongs to the field of hazardous waste disposal, specifically relating to a method for preparing a solidified fly ash incineration furnace for molten disposal of municipal solid waste. The fly ash is obtained from three-stage countercurrent rinsing. Fluxing materials, pore-forming materials, and cementing materials are then compounded and homogenized using a forced mixer. The homogenized fly ash composite is then fed to a brick press and formed into cubes under mechanical pressure. A through-hole is then drilled in the center of each cube to obtain a solidified wet fly ash body. This wet solidified fly ash body is then placed in a sample library and allowed to stand for 3 days to obtain a dried and hardened solidified fly ash body. This invention provides a steam pressure relief channel during the high-temperature melting process, solving the problem of bursting, improving heat exchange, and increasing melting efficiency. While providing sufficient cold strength to the solidified body, it reduces solidification costs, achieving efficient and safe disposal of fly ash.

This utility model discloses an OLED substrate encapsulation assembly, comprising: a substrate, a display functional layer fixedly connected to the top of the substrate, and a cover plate snapped onto the top of the substrate; and a stabilizing assembly, the stabilizing assembly including a frame adhesive, the frame adhesive being fixedly connected to the outer sides of both sides of the display functional layer. This utility model improves the adhesion between the frame adhesive and the substrate by utilizing the strong adhesion between the silicon oxynitride layer and the frame adhesive material, thereby improving the encapsulation efficiency of the frame adhesive. Simultaneously, the combination of slots and blocks enhances stability during the assembly of the substrate and the cover plate, preventing detachment and cracking. The frame adhesive further enhances the stability of the overall device assembly process. Furthermore, the electroactive polymer layer can deform under the influence of an electric field. During encapsulation, by controlling the electric field applied to the electroactive polymer layer, the electroactive polymer layer can use mechanical pressure to expel residual gas from the encapsulation cavity between the display functional layer and the cover plate.

The utility model relates to the technical field of vacuum infusion, and discloses a composite material vacuum infusion device which comprises a mold table, an infusion cavity is formed in the top face of the mold table, a glass fiber felt is attached to the inner bottom face of the infusion cavity, a vacuum bag is attached to the top face of the mold table, and a sealing structure used for improving the sealing performance of the vacuum bag is arranged on the top face of the mold table. The sealing structure comprises a pressing frame arranged above the mold table, and the bottom face of the pressing frame abuts against the top face of the vacuum bag. According to the utility model, through the arrangement of the sealing structure, the plurality of air cylinders extend out synchronously to drive the connecting frame to move downwards so as to drive the pressing frame to press downwards, and when the pressing frame descends in place, the edge of the pressing frame presses and seals the contact area of the vacuum bag and the mold table, so that a stable mechanical pressurization sealing structure is formed; in the process, mechanical pressing of the vacuum bag is achieved by applying external force, the sealing effect in the vacuum infusion process is remarkably improved, and the problem that the material performance is reduced due to leakage is effectively solved.

The utility model discloses a roof waterproof type solar flat plate collector relates to solar flat plate technical field, including outer frame and heat collecting plate, the outer frame is seted up in the mounting groove, the heat collecting plate is installed in the mounting groove, the top edge of mounting groove is seted up with seal groove, the seal groove is connected with sealing strip, the quality of sealing strip is rubber, the inboard of sealing strip and the outside edge of heat collecting plate are in close contact, the outside of sealing strip is butt joint with fastening strip, the outside of fastening strip is butt joint with clamping block, and the clamping block is connected between the inboard wall of fastening strip and seal groove, the utility model discloses through the rotation clamping block and make it connect between fastening strip and seal groove inboard wall, utilize the wedge tight principle of trapezoidal structure, and the fastening strip is pressed inboard tightly. This design can apply the sustained mechanical pressure to rubber sealing strip.

The invention discloses a surgical construction. The surgical construction has a lacing ring and a stopper that does not require knotting. In one embodiment, a surgical construction includes a ring having a strap knot terminating in a single tail. A mechanical pressure is applied to the single tail to deform the region of the surgical configuration and form a projection that acts as a stop. In some embodiments, a ferrule having an internal feature may be attached to a cerclage configuration adjacent to a crashing hitch to act as a stop and prevent loosening of the cerclage configuration.