8results about How to "Avoid overfilling" patented technology

A fuel refill system shut-off valve for a fluid delivery system providing an internal pressure line for use with a jet liquid level sensor is provided. The shut-off valve is closed unless there is a positive signal from the return pressure line, so the shut-off valve fails closed and overfilling due to a failure is avoided. An internal piston opens and closes a peripheral fluid outlet based on the presence or absence of back pressure provided by the return signal from the liquid level sensor located inside the fuel tank of the vehicle.

The application discloses a long spiral drilling machine concrete automatic pouring control method and system, the method comprises the following steps: in response to the pipeline filling rate and / or the concrete pressure reaching the preset value, the drill pipe automatic lifting mode is started; according to the feedforward speed and the feedback correction amount generated based on the concrete pressure deviation, the lifting speed is calculated, the winch equipment is controlled to lift the drill pipe according to the lifting speed, and the real-time correction of the lifting speed is carried out in the lifting process; the total lifting length is divided into multiple preset lengths, when the drill pipe is lifted by the preset length each time, the pile filling rate in the preset length range is calculated, if the pile filling rate is lower than the preset filling rate, the underfilling backfilling is carried out, after the backfilling is completed, the drill pipe returns to the original position and continues to lift until the concrete pouring is completed. The pouring process of the concrete is changed from the experience type manual adjustment to the closed loop control based on the pile filling rate and / or the concrete pressure, the underfilling and overfilling phenomena are avoided, and the piling quality is higher and more stable.

The utility model relates to a kind of dry-mixed mortar automatic quantitative packing packing device, including rack, hopper and support plate, hopper is installed at the top of rack, support plate is set on rack by elastic support structure, the bottom of hopper is separately provided with solenoid valve and mechanical valve, rack is provided with instantaneous skewing mechanism, instantaneous skewing mechanism and mechanical valve are mutually matched, and instantaneous skewing mechanism is connected with elastic support structure by transmission structure, rack is horizontally symmetrical between hopper and support plate and is provided with infrared emitter and infrared receiver, the utility model, by setting elastic support structure below support plate, and it is connected with instantaneous skewing mechanism and mechanical valve, the accurate control of mechanical valve is realized, infrared emitter and infrared receiver are set between hopper and support plate of device, realize the opening and closing of solenoid valve, prevent the leakage of dry-mixed mortar when replacing container, reduce the pollution to working environment, improve production efficiency and product quality.

This utility model relates to the field of prefabricated wall installation technology, specifically to a connection structure between a prefabricated wall and a floor. It includes a prefabricated base, on which a prefabricated wall is installed. The prefabricated wall is installed on the floor via the prefabricated base. A positioning groove is provided on the prefabricated base, and a positioning hole is provided at the bottom end of the positioning groove. A guide ramp is provided at the top of the side wall of the positioning groove. A flange connector is provided at the bottom end of the prefabricated wall in conjunction with the guide ramp, and an insertion groove is provided at the bottom end of the prefabricated wall. An inlet groove is provided on the guide ramp, and an inlet slide is provided on the flange connector. The inlet slide slides and engages with the inlet groove. A grouting port is provided on the prefabricated base, and a grouting channel is formed between the flange connector and the prefabricated base. The grouting port communicates with the grouting channel. This utility model can improve the accuracy and convenience of installing prefabricated walls on the floor, and increase installation efficiency.

This invention discloses a construction process for precise elevation positioning of cast-in-place concrete piles. In this process, two over-pouring detection instruments are fixed to a steel pipeline. The upper hook and operating platform of the steel pipeline are secured by springs and elastic rubber ropes. The lower hook of the steel pipeline is fixed to a wire loop, and a fusible gasket is used to fix the wire loop to the longitudinal reinforcement of the steel cage. When energized, the fusible gasket melts upon heating, automatically separating the wire loop from the longitudinal reinforcement. The spring between the upper hook and the operating platform returns to its natural state after losing the influence of the lower steel cage's weight. This invention provides a construction process for precise elevation positioning of cast-in-place concrete piles, enabling control over over-pouring height, saving materials, and avoiding the need for pile head demolition when exceeding the design elevation.

The invention relates to the technical field of brick machine material distribution, in particular to a brick machine built-in mold stripping material distribution device which comprises a frame. The conveying belt is used for conveying the raw materials discharged by the storage unit; the material distributor is used for distributing materials in the mold; a discharging port of the material storage unit corresponds to the feeding end of the conveying belt, a controllable discharging valve is arranged at the discharging port of the material storage unit, and the discharging end of the conveying belt extends to the position above a feeding port of the distributing device and is used for stably conveying raw materials into the distributing device; according to the material distributing frame, continuous and orderly feeding of the multiple material distributing hoppers can be achieved through sliding fit of the guide wheels and the guide sliding rails; after all the material distributing hoppers are quantified, the material distributing frame can accurately align all the material distributing hoppers to the position above the die cavity at a time, and the fan-shaped switch is synchronously turned on to complete material distribution.

The utility model discloses a thick -walled product anti -shrinkage injection mold, including the upper die plate, the movable die plate etc. conventional component is equipped with injection pipe and injection embedding block still. Four mould cavities are " field " shape distribution, and the upper and lower die benevolence central place is equipped with the connecting port and " a " word passage, and injection pipe intercommunication injection port and the connecting port, and " a " word passage both sides are equipped with injection embedding block mounting port. Injection embedding block is composed of left and right embedding block, and the injection passage between them contains entry, export and arc segment, and the diameter of arc segment is gradually reduced, and the export is long waist type structure. The mould passes through unique mould cavity layout and injection channel design, realizes plastic melt high -efficient balanced distribution delivery, and arc segment booster, long waist type export optimization melt filling, reduces product shrinkage defect, and promotes product consistency and quality, and simultaneously, injection embedding block is convenient for installation and removal, improves mould versatility and production efficiency.

The application provides a high-pressure container liquid level detection method based on a normal-pressure instrument, and belongs to the technical field of liquid level detection.The high-pressure container liquid level detection method based on the normal-pressure instrument comprises the following steps: a transparent pressure-isolating cover plate is designed; a measurement channel is arranged on the high-pressure container; a sensor fixing plate is designed; the sensor fixing plate is installed on the high-pressure container; the pressure-isolating cover plate is installed on the sensor fixing plate; a laser distance measuring sensor is placed on the pressure-isolating cover plate; an instrument cover is installed outside the laser distance measuring sensor; and the laser distance measuring sensor is started to detect the liquid level in the high-pressure container.The high-pressure container liquid level detection method based on the normal-pressure instrument is simple to operate, low in cost, and can detect the liquid level of the high-pressure container by using a normal instrument in a normal-pressure environment.