43results about How to "Serve the purpose of protection" patented technology

The invention discloses an abnormal voltage protection device in circuit board testing, which is connected between a circuit board to be tested and a test set, and comprises a relay, a singlechip, an A / D converter and a memorizer, wherein, the singlechip is connected with the relay; the A / D converter is connected between one contact point of the relay and the singlechip; the memorizer is connected with the singlechip and is used for storing a standard output voltage of the circuit board to be tested; and the other two contact points of the relay are respectively used for connecting the circuit board to be tested and the test set. Applied to the circuit board testing, the unusual voltage protection device serves the protection purpose reliably when the voltage output by the circuit board to be tested is abnormal, so as to avoid the failure of the test set; and the settings of the device is simple, the universality is good, and the device can be applied to the testing processes of the circuit boards in different types.

The application provides an ink return mechanism and a seal device, which relate to the technical field of seals. The ink return mechanism includes a bracket and a sleeve slidably sleeved on the bracket, a stamping clamp for holding a stamp is arranged in the bracket, and the stamping clamp is fixedly connected with the sleeve, the A stamping area is formed at one end of the bracket; the orthographic projection of the stamp surface clamped by the stamping fixture is located in the stamping region, and the bracket is also provided with a seal surface for abutting and covering the stamp surface The protective cover is rotatably connected to the bracket and the sleeve through a support shaft; push the sleeve to slide in the direction close to the seal area, and the protective cover is exposed as the support shaft rotates On the seal face, the seal moves linearly to the stamping area of ​​the bracket for stamping operation. It can press the seal and seal the seal face in the non-sealed state, protect the seal face, and improve the compactness of the structure.

The invention discloses a novel micro-tillage machine for an agricultural machine. The novel micro-tillage machine comprises an engine base and a bearing, wherein a diesel engine is mounted at the upper end of the engine base; a speed reducer is mounted at the right side of the diesel engine; a transverse transmission rod is mounted between the diesel engine and the speed reducer; a mounting disc is fixed at the outer side of a rotating wheel; the outer side of the mounting disc is connected with a rotary blade through a regulating mechanism; a caterpillar track is arranged below the engine base; a driving wheel and a driven wheel are mounted at left and right sides in the caterpillar track respectively; the left side of the driving wheel is connected with a transmission mechanism through a second transmission belt; the upper end of the transmission mechanism is connected with the diesel engine; the caterpillar track is internally provided with a buffering mechanism; the buffering mechanism is located between the driven wheel and the driving wheel; and a handle is fixed at the left side of the engine base. The novel micro-tillage machine for the agricultural machine, disclosed by the invention, is provided with the regulating mechanism and the distance of the rotary blade can be conveniently regulated; and the distance, exceeding the rotating wheel, of the rotary blade can be conveniently controlled so that the distance, entering the ground, of the machine can be regulated.

The invention relates to the technical field of fish farming, and discloses a forage feeding device for fish farming, comprising a device main body, the upper end of the device main body is provided with a bearing frame, and the upper end of the bearing frame is fixedly welded with a feeding trough, The bottom of the inner wall of the discharge trough is provided with a push mechanism, and a limiting plate is installed on one side of the push mechanism on the inner wall of the discharge trough, and an extruding mechanism is installed through the top of the discharge trough, and the main body of the device One side of the carrier frame at the upper end is equipped with a support mechanism, the upper end of the support mechanism is provided with a feeding conveyor belt, and a material receiving frame is installed below the discharge chute at the upper end of the feeding conveyor belt, and the inside of the carrier frame is installed With brake motor. The forage feeding device for fish farming can improve the safety of use, avoid the phenomenon that the fish school affects eating due to excessive grabbing, and can crush forage of different sizes to meet the use requirements.

The invention relates to the related field of electrical cabinets, and discloses a flood control and dehumidification electrical cabinet device, which includes a main box body, a motor is arranged in the main box body, a fan wheel transmission chamber is arranged on the lower side of the motor, and a fan wheel transmission chamber is arranged on the lower side of the fan wheel transmission chamber. Clutch chamber, the left and right sides of the clutch chamber are provided with fan pulley chambers arranged symmetrically with the clutch chamber as the center, the clutch transmission chamber is provided on the lower side of the clutch chamber, and two The left and right symmetrical clutch transmission belt senses the rise of the external water potential through the descending distance of the hydraulic pressure block, and under the drive of the clutch pull rope, it affects the meshing relationship between the clutch slider and the power-off friction block cavity, so as to indirectly affect the flood control. The opening and closing relationship between the plate and the flood control cooling chamber, so as to control the opening and closing timing of the flood control device, and when the external water potential is too high, the hydraulic pressure block will drive the movement of the power-off slider, thereby driving the movement of the power-off friction block , so as to achieve the purpose of disconnecting the main power switch to protect the power supply.