16results about How to "Protect against damage" patented technology

The utility model belongs to the field of garden irrigation, and particularly relates to plant timing irrigation equipment for garden landscape construction, which comprises a water spray pipe, a nozzle is arranged at the bottom end of the water spray pipe, and a water flow control component is arranged in the water spray pipe. The rotating rod is automatically driven to rotate through flowing of water flow, the water flow passes through the nozzle periodically, no extra electric control assembly is needed under the purpose of achieving regular periodic irrigation, and therefore cost is reduced; in the process that irrigation is not carried out, the baffle plate can block the nozzle, dust, sundries, insects and the like can be effectively prevented from entering the sprayer, and therefore the sprayer is prevented from being blocked or damaged, the normal service life of the sprayer is guaranteed, and water is prevented from permeating out of the water spraying pipe to cause waste of a water source; when water flow is sprayed out through the nozzles, the water flow can be lapped to the top of the connecting plate at the moment, the situation that the water flow is directly lapped to the ground to cause soil erosion is avoided, tender plants are protected from being damaged, and growth and health of the plants are guaranteed.

The invention relates to the technical field of wave-absorbing metamaterials, in particular to a lattice element sequential wave-absorbing metamaterial and a preparation method thereof.The wave-absorbing metamaterial comprises a substrate and a lattice structure layer, and the lattice structure layer is formed by arranging a plurality of structure units on the surface of the substrate in a periodic array mode; each structural unit is formed by arranging a plurality of dot matrix elements; the dot matrix elements are sheet-shaped magnetic dot matrix elements. The wave absorbing crest of the dot matrix superstructure moves towards high frequency, and RLlt; and the effective absorption bandwidth of-10dB is improved. The wave-absorbing strength and bandwidth are improved, and the problem that an existing homogeneous wave-absorbing coating is difficult to have the characteristics of small thickness and light weight while the bandwidth is improved is solved.

The present invention discloses a push-pull control output circuit with positive and negative input protection, including a push-pull output module, a positive / negative voltage input protection module and an overcurrent detection protection module electrically connected to each other: the push-pull output module is connected to a power supply, and is used to convert a control input signal OutD_Ctr at a VCC power supply end into a drive output signal OUTD at a VCC_D power supply end; the positive / negative voltage input protection module is used to cut off the power supply circuit to prevent current backflow when the push-pull output module is mistakenly connected to a positive / negative voltage input power supply; the overcurrent detection protection module is used to monitor the output terminal current of the push-pull output module to perform overcurrent protection on it. The present invention can achieve tolerance of positive / negative voltage input of an external power supply, effectively avoid damage to the output circuit caused by mistaken connection to a power supply, and has high reliability.

The invention belongs to the technical field of cosmetics, and particularly relates to an anti-wrinkle, firming and repairing composition containing sturgeon caviar extract and application of the anti-wrinkle, firming and repairing composition. According to the anti-wrinkle, firming and repairing composition, the adding amount of the sturgeon caviar extract is increased, and the sturgeon caviar extract is compounded with other functional components, so that the effects of synergistically increasing skin elasticity, smoothing wrinkles, repairing skin barriers, protecting skin injuries and promoting absorption of active substances are achieved, and skin aging is relieved from internal and external dual aspects.

The invention discloses an optical element spherical surface detection clamp, and relates to the technical field of infrared optics, the optical element spherical surface detection clamp comprises a clamping mechanism, an optical glass lens is arranged above the clamping mechanism, the clamping mechanism comprises a fixed base, the fixed base is of a square block structure, the top of the fixed base is provided with an arc-shaped clamping placing plate, and the arc-shaped clamping placing plate is provided with a clamping groove; relates to the technical field of infrared optics, a clamping mechanism and an elastic sealing cushion are arranged to seal a gap between an optical glass lens and negative pressure exhaust holes, so that the optical glass lens is placed and supported, and the optical glass lens is stably clamped in a manner of uniform negative pressure adsorption of the negative pressure exhaust holes, so that the optical glass lens is stably clamped, and the optical glass lens is prevented from being damaged. The problem that the optical glass lens is prone to deformation and damage due to the fact that pressure intensity of partial positions is too large due to conventional single-point or multi-point clamping is avoided, meanwhile, certain buffering is provided for the optical glass lens through the elastic sealing soft cushion, and the problem that partial extrusion damage occurs when the optical glass lens is adsorbed and clamped is reduced.

According to the electronic anti-collision device of the laser head for laser additive manufacturing, a first alignment column and a second alignment column are oppositely arranged and connected in a positioning mode, one end of a first butt joint is installed to a fixed position through a first torque motor, a laser head is installed on a second butt joint through a second torque motor, and a micro-touch switch is arranged on the first alignment column; a release groove is formed in the second alignment column, the execution end of the micro-touch switch is located in the release groove, the micro-touch switch is connected to the anti-collision controller, and the anti-collision controller is connected to the power supply device. According to the electronic anti-collision device of the laser head for laser additive manufacturing, when the first alignment column and the second alignment column move relatively, the micro-touch switch is touched, the micro-touch switch senses a displacement signal and transmits the displacement signal to the anti-collision controller, the anti-collision controller judges that the laser head is collided, the laser welding head is powered off, and the laser welding head is powered off. Therefore, other parts or workers are prevented from being damaged, and the safety performance of the device is improved.

This utility model discloses a manual winding machine, including a fixed plate, a connecting rod, a winding reel, a winding rod, a worktable, a fixed plate, a connecting rod for fixing the winding machine, and a clamping device. The clamping device can be fixed on any tooling table. The connecting rod connects to the winding reel, causing it to rotate. The winding reel has holes for fixing the winding rod, which controls the consistency of the winding size. The winding rod has a positioning and fixing function, allowing the cable to be coiled around multiple winding rods for winding. The cable is coiled together by several components. The worktable has locking casters at the four corners, allowing for easy movement of the workstation. This ensures that the equipment can maintain convenient movement during workshop transfers and production line adjustments, while also withstanding the mechanical vibration generated by high-frequency winding operations. The overall system achieves closed-loop control of the entire process of "fixing-transmission-forming-moving" through modular design.

The utility model discloses a portable card reader comprising a card reader main body, one side and the rear surface of the card reader main body are respectively provided with two card slots, and the outer side of the card reader main body is sleeved with an L-shaped protective cover. According to the portable card reader provided by the utility model, the card reader main body, the card slot and the L-shaped protective cover are matched with each other, so that the card reader can accommodate various equipment memory cards, the memory cards are prevented from being damaged, the card reader and the memory cards are convenient to carry together, a connecting wire and a connecting plug can be stably clamped through the limiting clamping frame and the plug clamping sleeve, and the card reader is convenient to carry. The connecting line and the connecting plug are folded, stored and used conveniently, the connecting line is folded and clamped in the limiting clamping frame, the connecting line can be taken out section by section when being taken out, the clamped part can be taken out according to the use requirement, it can be ensured that the connecting line is stored in order, winding and knotting are avoided, and the plug clamping sleeve is responsible for clamping the connecting plug and blocking the front end of the connecting plug. And dust is prevented from entering the connecting plug.

This utility model belongs to the technical field of tail gas recovery devices, specifically relating to a tail gas recovery device for a desulfurization regeneration tank. It includes a tail gas recovery tower, with an air inlet installed on the outer wall near the bottom on one side. The other end of the air inlet is connected to one end of a connecting pipe via a flange. A cooling jacket is fitted onto the outer wall of the connecting pipe. In use, the connecting pipe is connected to the tail gas discharge port of the desulfurization regeneration tank, and a water pump is started to discharge cooling water from the cooling water tank to the inlet. The cooling water then enters the cooling jacket through the inlet. Once inside the cooling jacket, the cooling water lowers the temperature of the heat-conducting coils. The tail gas from the desulfurization regeneration tank then flows along the spiral track formed by the annular sleeve and the filling column after entering the connecting pipe. This increases the flow time of the tail gas in the connecting pipe, allowing it to absorb a significant amount of heat through the interaction of the cooling jacket's heat-conducting coils.

The utility model relates to the technical field of cutting fluid, in particular to a cutting fluid blending and storing device which comprises a thermal insulation box, a locking clamp is arranged on one side of the upper surface of the thermal insulation box, one side of the locking clamp is fixedly connected with a moving block, a lower screw rod is in threaded connection with the interior of the moving block, a gear is fixedly sleeved at one end of the lower screw rod, and one side of the gear is meshed with a rack. A fixing plate is installed on one side of the rack, a liquid level meter is arranged on one side of the fixing plate, a liquid storage tank is installed at the bottom of the liquid level meter, and a liquid inlet pipe is installed on one side of the liquid storage tank; the cutting fluid filling device has the beneficial effects that cutting fluid is filled into the liquid storage tank from the liquid inlet pipe, filling is carried out according to the display of the liquid level meter and the specified capacity standard, the sealing sleeve is inserted into the liquid inlet pipe, and at the moment, the clamping clamps move oppositely, so that the sealing sleeve is clamped by the locking clamps; the situation that a sealing cover fixed through multiple sets of bolts needs to be mounted and dismounted in the liquid adding process is avoided, rapid adding of the cutting liquid is facilitated, the heat insulation box can isolate direct irradiation of sunlight, and failure of the cutting liquid is avoided to a great extent.

The utility model relates to the technical field of sealing devices, in particular to a sealing mechanism sealing assembly which comprises a sealing mechanism device body, a controller is fixedly installed above a sealing anti-corrosion assembly, an induction column is fixedly installed at the output end of the controller, and a connecting port is installed at the tail end of the induction column. A first power pack is fixedly installed at the input end of the connecting port, an anti-corrosion plate is installed on the outer side of the first power pack, the connecting port and the side face connecting port make contact with the outside and transmit data to the first power pack, the controller drives the induction column to monitor the aging condition in the device, and the anti-corrosion plate isolates the outer side of the circuit breaker. Meanwhile, the radiator can cool the interior, the situation that the temperature inside the device rises too high, and consequently elements are aged fast is avoided, the front protection plate and the sealing cover comprehensively protect the outer side of the device, the situation that sea wind and sea water influence the internal elements is avoided, and meanwhile the situation that when the circuit breaker is used, the conditions of the internal elements cannot be judged, and maintenance and replacement are not convenient is avoided.

A method for determining the hinge reaction torque in the event of a holding-moment hinge deployment impact includes: establishing the system dynamic equations; setting the current values ​​(HoldMarker_H5, HoldMarker_H6) of the holding hinge flags for hinges H5 and H6, and the updated values ​​(HoldMarker_H5_update, HoldMarker_H6_update) of the holding hinge flags for hinges H5 and H6; updating the system generalized coordinate matrix q, the generalized coordinate first-order derivative matrix with respect to time, and obtaining the system generalized coordinate q at the next moment. i The constraint reaction force of each hinge is compared with the structural strength of the hinge. This invention solves the problem of high safety design and testing costs of the entire satellite hinge caused by the large impact torque during satellite antenna deployment.

The invention discloses an epilepsy seizure alarm device, and relates to the technical field of medical treatment. The sickbed comprises a sickbed body, leg supports are slidably connected to the top of the sickbed body, a pillow is arranged at the top of the sickbed body, and universal wheels are arranged at the bottom of the sickbed body; and an alarm device is arranged at the top of the sickbed. Force for driving the fixed block to move through leg support displacement is matched with a positioning rod, a fixed rod, a knocking rod and other components in the alarm device, the fixed rod is driven to move through the fixed block displacement, then the knocking rod is driven to move through the fixed rod displacement, the bell is knocked through the knocking rod displacement, the bell makes a sound, and the alarm effect is achieved. According to the invention, the system achieves the effect of automatically giving an alarm when a patient gets ill, reduces the work pressure of nursing personnel, avoids the dependence on complex electrical equipment, and also reduces the possible faults of electronic equipment.

The present invention discloses a high-efficiency electromagnetic shielding clothing fabric and electromagnetic shielding clothing, the electromagnetic shielding clothing fabric is composed of a functional composite layer and an inner lining; the inner lining is detachably connected to the inner side of the functional fabric; the functional composite layer is composed of a conductive cloth, a hydrophobic protective cloth and an absorbing material layer, the conductive cloth, the hydrophobic protective cloth and the absorbing material layer are stacked and fixedly connected, and the hydrophobic protective cloth is located between the conductive cloth and the absorbing material layer; the electromagnetic shielding clothing is made of the electromagnetic shielding clothing fabric described above. The electromagnetic shielding clothing fabric and electromagnetic shielding clothing provided by the present invention can effectively reduce the penetration of low-frequency electromagnetic waves. Within the frequency range of 1 to 40 GHz, the vertical incidence shielding effectiveness reaches more than 50 dB, and the average absorption attenuation efficiency reaches more than 10 dB. It has good electromagnetic shielding effectiveness for both vertical and oblique incident electromagnetic waves, and is thin, breathable, easy to put on and take off, etc., suitable for human body wear.

The utility model belongs to the field of low-speed diesel engine crosshead pin shaft manufacturing, and particularly relates to a tool for grinding an outer circle of a low-speed diesel engine crosshead pin shaft. According to the tool, the large-diameter pipe thread is directly connected with the crosshead internal thread, the tool cone circle and the crosshead taper hole are attached and positioned, the datum circle is combined for alignment, datum unification of boring and grinding procedures is achieved, the tool cone angle on one side of the tool center through hole effectively protects the end face of the tool taper hole from being damaged, and the service life of the tool is prolonged. The coaxiality of a large-diameter pipe thread, a workpiece cone circle, a reference circle and a workpiece taper hole is controlled within 0.01 mm, and through group use and same-group identification matching, mixed use errors are avoided, the material of a tool is consistent with that of a workpiece, and the influence of thermal deformation difference on precision is reduced. The method has the advantages of being high in machining precision, low in cost, convenient to operate and the like, and the machining quality and efficiency of the crosshead pin shaft are remarkably improved.

The application relates to the technical field of crane motion control, and discloses an electric grab bucket protection system and a control method thereof, wherein the system comprises a PLC, an inductive switch, a current transformer, a grab bucket opening AC contactor and a grab bucket closing AC contactor which are electrically connected with the PLC respectively; the current transformer is used for sampling electric grab bucket current information and transmitting the information to the PLC; and the inductive switch is used for controlling whether the current transformer transmits the sampled electric grab bucket current information to the PLC. The application solves the problems of the prior art, such as the incapability of accurately controlling the opening and closing limit of the grab bucket and the poor protection effect.