38results about How to "Pressure relief" patented technology

A vent system for an axle of a heavy-duty vehicle includes a check valve and an exhaust tube that is connected to the check valve. The check valve includes a first end that is mounted on the axle, a second end, and a body that is disposed between the first and second ends and is in selective fluid communication with the axle interior. The exhaust tube includes a first end that is mounted on the second end of the check valve, and a second end that is open to atmosphere and is in fluid communication with the check valve body. Using any one of a number of types of configurations for the valve body, the vent system selectively exhausts air from the axle interior to atmosphere to relieve buildups of pressure in the axle, while protecting the integrity of the check valve and preventing contaminants from entering the axle.

A fuel pump for a direct injection internal combustion engine having a housing defining a pump chamber. Driven and idler toothed gears are rotatably mounted within the pump chamber so that the driven and idler gears are in mesh with each other at a predetermined location in the pump chamber. A fluid inlet is formed through the housing and open to an inlet subchamber in the pump chamber. A fluid outlet is also formed through the housing and open to an outlet subchamber in the pump chamber. A pressure relief passageway fluidly connects the inlet subchamber to the outlet subchamber and a valve is disposed in series with the pressure relief passageway. A control circuit controls the actuation of the valve to control the pump pressure at the pump outlet.

The invention discloses an anti-collision and anti-theft air-conditioner-type charging pile. The anti-collision and anti-theft air-conditioner-type charging pile comprises a base, the base is upwardsconnected with a shell, and the shell is provided with an inner cavity. A charging mechanism is arranged in the inner cavity of the shell, the outer wall of the shell is provided with a charging gun connected with the charging mechanism through a cable, and a mounting plate is connected to the bottom end of the base and fixed to the ground through foundation bolts. The anti-collision and anti-theft air-conditioner-type charging pile further comprises an anti-collision mechanism, a humidity-control anti-dust mechanism and an anti-theft mechanism. According to the anti-collision and anti-theft air-conditioner-type charging pile, the collision path of a motor vehicle is studied and judged, the active anti-collision function is achieved, an anti-collision device is arranged on the path where the motor vehicle collides to the charging pile, and thus the situation that due to improper driving of a driver, the motor vehicle collides to the charging pile can be effectively prevented. Accordingto the anti-collision and anti-theft air-conditioner-type charging pile, air cleanness and little dust in the charging pile can be kept, and the temperature and humidity in the charging pile are keptat the optimum interval; and the humidity-control anti-dust mechanism can keep the temperature in the charging pile shell within the optimum work temperature range through a constant-temperature method.

A device for measuring the thickness of asphalt mixture virtual paving and its use method, including a sliding rod, a fixed rod, a connecting sleeve, a control device and a handle; the top of the sliding rod is provided with a counterweight, the bottom of the sliding rod is provided with a tray, There is a long hole on the upper part of one side; the fixed rod is inserted into the sliding rod, the upper part of the fixed rod is provided with a threading hole at the position corresponding to the long hole, and a displacement sensor is installed on the top of the fixed rod; the connecting sleeve is set on the outside of the sliding rod , there is a connection hole on the connection sleeve at the position corresponding to the long hole; the control device is connected to the connection sleeve; a connection plate is connected between the control device and the fixed rod; the connection plate is horizontally installed in the long hole and In the connection hole; the control device includes an outer box, a display screen, a display circuit board and a control circuit board; an operation button is arranged on the top of the outer box. The invention solves the technical problems of low work efficiency, large influence of human factors, inaccurate readings of measurement results and insufficient standardization of the measurement process in the traditional asphalt virtual paving method.

The invention discloses a hydraulic machine with an impact correction device. The hydraulic machine comprises a base, a four-column frame, a stamping device, a hydraulic oil cylinder and a PLC control device. The stamping device is connected to the top position of the four-column frame to conduct up-down stamping. The hydraulic oil cylinder is connected with an oil supply device through a three-way overflow valve. The impact correction device comprises a flexible impact ring, an elevation device and a back-flushing hydraulic oil cylinder. The flexible impact ring is fixed to the top position of the base through the elevation device. The other end of the three-way overflow valve is connected with the elevation device of the impact correction device so that the flexible impact ring can be opened or locked, and the back-flushing hydraulic oil cylinder is supported at the bottom of the base through a jack structure. According to the hydraulic machine, the flexible impact ring is arranged above the base, the flexible impact ring is jacked up through the back-flushing hydraulic oil cylinder and the jack structure of the impact correction device, and relief of the overlarge stamping force of the stamping device is achieved.

Described herein is a multi-functional seating and resting device. The device is generally comprised of a pair of hemispheres forming a hexagonal shape and movable between a first position and a second position. The first position generally forms the hexagonal structure defining an interior core with a cavity for the placement of items. In the second position, the hemispheres are generally placed in an adjacent position next to each other to form a surface for seating on by a user. The device is preferably constructed from a foam material for comfort and durability.

The invention provides a control method for a substation VQC of considering the security of a variable medium-voltage side voltage, and aims at solving the problem that an existing control on the substation VQC according to a traditional 17-zone diagram cannot effectively ensure that a medium-voltage side busbar voltage of a three-winding transformer is located in a security range. The method comprises the following specific steps: firstly, collecting operating parameters of the three-winding transformer and a reactive power compensation configuration state of a low-voltage side; secondly, setting boundary conditions of a main transformer gate reactive power and a low-voltage side busbar voltage, and calculating a critical value of the security of the variable medium-voltage side voltage; and finally, setting locking conditions of a main transformer gear and reactive power compensation equipment and carrying out main transformer gear adjustment and reactive power compensation equipment switching according to predetermined strategies under different boundary conditions. According to the control method, the security of the medium-voltage side busbar voltage of the main transformer is considered when the condition that a high-voltage side reactive power and the low-voltage side busbar voltage of the three-winding transformer in the substation are located in a reasonable range is ensured; and the voltage adjusting pressure of a lower power grid at a load peak is relieved.