6results about How to "Change the circulation area" patented technology

The utility model discloses a kind of oil cylinder hydraulic control system and heat treatment loading and unloading machine hydraulic control system, belong to hydraulic control technical field, wherein oil cylinder hydraulic control system includes oil cylinder uplink on-off valve group, oil cylinder pressure-keeping on-off valve group and oil cylinder downlink control valve group;Oil cylinder downlink control valve group includes two-way plug-in proportional valve with pilot valve.Heat treatment loading and unloading machine hydraulic control system includes oil cylinder and above-mentioned oil cylinder hydraulic control system, and the stem cavity of oil cylinder is communicated with oil tank.Two-way plug-in proportional valve, the opening of valve can be accurately controlled, change the flow area of fluid, reach the purpose of controlling flow and pressure, realize the control to fluid, the valve has the characteristics of fast response speed, accurate control, with good stability, can keep the stability of fluid parameter in long time running process, improve work efficiency and production benefit, can satisfy the high-speed response requirement of hydraulic system, realize the accurate control to oil cylinder's downlink action.

The invention relates to the technical field of centrifugal pumps, and discloses a self-suction centrifugal pump flow adjusting device and method.The self-suction centrifugal pump flow adjusting device structurally comprises a support, a driving motor set, an elastic coupler, a pump body, a self-suction noise reduction cavity, a dustproof assembly and a variable flow guide noise reduction mechanism. A variable flow guide noise reduction mechanism is mounted in the cavity, when an eccentric column on the rotating disc does eccentric motion, a connecting rod in sliding fit with the eccentric column is driven to swing on the fixing frame, and the connecting rod swings left and right through the limiting effect of a top sliding block, so that a plurality of swinging blocks are driven to swing synchronously; the multiple flow guide blades can be controlled to synchronously rotate, the flow area of the pump body is changed, the flow rate is adjusted, the sound absorption lining plate is installed in the self-absorption noise reduction cavity, noise generated during gas-liquid separation in the pump body can be absorbed through the formed sound absorption holes and the sound absorption cotton layer, and the noise reduction effect is achieved.

The utility model discloses a production mould of motor shell, including forming mechanism, cooling water adjusting mechanism and adjusting auxiliary mechanism, the forming mechanism includes upper module and bottom module, the cooling water adjusting mechanism includes adjusting pipe and rotating sleeve, the adjusting auxiliary mechanism includes outer tooth ring and damping ring, and the forming mechanism realizes the accurate forming of motor shell through the cooperation of upper module, bottom module, forming block and forming groove, and the design of injection moulding hole through forming block ensures that injection moulding material fills evenly, optimizes injection moulding path, reduces bubble and defect formation, and the combination design of adjusting pipe and rotating sleeve is adopted to cooling water adjusting mechanism, realizes the accurate control to cooling water flow, and the cooperation structure of spin -in block and plugging board can change the flow area of adjusting pipe to adjust the cooling rate, and spin -in block provides constant pressure, ensures that the adjusting system is stable and reliable.

The utility model discloses a tunnel concrete injection quantity adjusting nozzle, and belongs to the technical field of tunnel construction. Comprising a connecting pipe and a nozzle movably connected with the connecting pipe, and the nozzle moves in the length direction of the connecting pipe; a partition plate is arranged on the inner wall of the connecting pipe in the circumferential direction to divide the connecting pipe into two independent cavities, a conical adjusting assembly penetrates through the partition plate and is fixedly connected with the spray head, and when the connecting pipe and the spray head move relatively, the size of a gap between the outer wall of the conical adjusting assembly and the partition plate is changed. The partition plate is arranged in the connecting pipe for conveying concrete and penetrates through the conical adjusting assembly, the conical adjusting assembly is fixedly connected with the spray head, an operator manually shifts the spray head to move, the size of a gap between the outer wall of the conical adjusting assembly and the partition plate is changed, the circulation area of the concrete is changed, and the problems that the concrete is uneven in distribution during spraying, and the spraying effect is poor are solved. In addition, the adjusting nozzle is simple in structure and convenient to operate, and saves cost and manpower.

The utility model relates to flow measurement technical field discloses a kind of accurate wedge flowmeter, including measuring tube, the outer wall of measuring tube is fixedly connected with square box one, the inside fixedly connected with motor one of square box one, the drive end fixedly connected with transmission rod one of motor one, the outer wall rotationally connected with connecting rod one of transmission rod one, the outer wall rotationally connected with transmission rod two of connecting rod one, the inner wall fixedly connected with fixed link one of square box one, the inner wall fixedly connected with fixed block one of square box one, the inside slidingly connected with connecting rod two of fixed block one. In the utility model, by up and down adjusting wedge block, can make the interaction of wedge block and fluid reach optimum state, let differential pressure signal and the corresponding relationship of flow be more accurate, adjust measuring performance by adjusting wedge block, make it more easily satisfy calibration requirement, improve the efficiency and accuracy of calibration.

The utility model relates to the technical field of anti-freezing powder spreading, and discloses an anti-freezing powder uniform spreading device which comprises a storage tank, a feeding hopper is arranged on the storage tank, a conveying pipe is fixedly connected to the bottom of the storage tank, a first fixing plate is fixedly connected to one side of the conveying pipe, a first threaded rod is connected to the first fixing plate in a threaded mode, and a second threaded rod is connected to the second fixing plate in a threaded mode. According to the device, the disc and the fixing block are driven by the motor to rotate, then the circular ring and the connecting rod are driven to move in a reciprocating mode, the spraying head swings in a reciprocating mode, the spraying range of the spraying head to a train compartment is remarkably enlarged, and the spraying effect of the spraying head on the train compartment is improved; the anti-freezing powder spraying device ensures that anti-freezing powder is sprayed more uniformly in a train, effectively prevents coal from being adhered to a carriage, improves the spraying effect, and meanwhile, due to the fact that spraying is more uniform, the situation of repeated spraying or missing spraying caused by uneven spraying is reduced, and therefore the spraying efficiency is improved.