13results 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 present invention discloses a shower head, comprising a handle, a flow regulating mechanism and a shower head connected to the handle, wherein the handle is provided with a water inlet, and the shower head is provided with a water inlet and a connecting portion for connecting to the handle; the flow regulating mechanism comprises a rotating shaft installed in the connecting portion, a dial ring assembly for pulling the rotating shaft to move, the dial ring assembly is sleeved on the connecting portion, and the dial ring assembly is provided with an adjustment track; the rotating shaft is provided with a linkage member adapted to the adjustment track, the linkage member passes through the connecting portion and is inserted into the adjustment track; a water inlet channel connected to the water inlet is provided in the rotating shaft, and the rotating shaft is provided with an adjustment hole corresponding to the water inlet. By adopting the present invention, the flow rate can be adjusted, and it can also be adjusted smoothly during use.

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 defrosting compact evaporator for the automobile air conditioner comprises an evaporator body, four sets of first mounting plates are fixedly connected to one side of the evaporator body, a first sliding rail is fixedly connected between the first mounting plates on the left side and the right side, and a first moving plate is slidably connected to the outer side of the first sliding rail; second mounting plates are fixedly connected to the outer sides of the first moving plates, second sliding rails are fixedly connected between the second mounting plates, second moving plates are slidably connected to the outer sides of the second sliding rails, mounting boxes are fixedly connected to the interiors of the second moving plates, and control grooves are formed in the interiors of the mounting boxes; an air inlet cylinder is slidably connected into the control groove, a horn mouth is fixedly connected to the side, away from the evaporator, of the air inlet cylinder, and when an automobile runs, hot air flowing through the evaporator can be collected, the frosting position can be heated in a targeted mode, and the quick defrosting effect is achieved.

This utility model discloses a processing device for shielding covers of electronic products, including a feeding rack, a suction cup below the feeding rack, a connecting pipe at the top of the suction cup, an adapter and a conveying pipe on one side of the connecting pipe, an action plate on the outside of the conveying pipe with an action groove, a displacement groove on the inside of the conveying pipe with a displacement plate in the displacement groove, a movable block on one side of the displacement plate, an offset sleeve slidingly fitted on the outside of the conveying pipe, a linkage block on one side of the action plate with a linkage spring on one side of the linkage block, an adaptation block on the outside of the conveying pipe, a traveling plate on one side of the offset sleeve with a stepping plate, a stepping frame on one side of the adapter with a stepping rod in the stepping frame, a polygonal rod on the inside of the adapter, a sliding sleeve on the inside of the conveying pipe with a polygonal sleeve on the inside of the sliding sleeve, an adaptation sleeve on one side of the sliding sleeve, and multiple moving grooves on the outside of the conveying pipe. This utility model achieves flexible adjustment of the suction speed and intensity and ensures adsorption stability.

The utility model provides a shock absorber combination valve and a shock absorber. The shock absorber combination valve comprises an electromagnet assembly, a cylindrical valve body and a passive valve assembly which are sequentially arranged in a shock absorber cylinder body. A sliding pin, a damping seat and a main valve element assembly are arranged in the valve body. A first cavity is formed between the damping seat and the main valve element assembly, a second cavity is formed between the damping seat and the electromagnet assembly, the first cavity is communicated with the compression working cavity, and the second cavity is communicated with the recovery working cavity through a throttling channel arranged on the valve body; a first one-way valve unit which is in one-way conduction in the direction pointing to the second cavity is arranged between the sliding pin and the damping seat, a second one-way valve unit which is in one-way conduction in the direction pointing to the first cavity is arranged between the damping seat and the main valve element assembly, and the electromagnet assembly drives the sliding pin to move in the axial direction of the valve body. The flow area between the first cavity and the second cavity can be changed. The combined valve of the shock absorber is beneficial to platform design and manufacture.

The utility model relates to a constant-speed heat exchanger and belongs to the field of heat exchangers. Comprising tube boxes, a shell, tube plates, baffle plates and heat exchange tubes, the tube boxes are arranged at the two ends of the shell, the baffle plates and the heat exchange tubes are all arranged in the shell, the heat exchange tubes are evenly distributed in the shell through the tube plates, constant-speed rollers are axially arranged in the heat exchange tubes, positioning hexsteel is arranged at the two ends of each constant-speed roller, and the constant-speed rollers are fixed through the positioning hexsteel. And the positioning hexsteel is connected with the tube plate through a connecting assembly. The utility model stabilizes the flow velocity of the medium in the heat exchange tube, prevents the equipment from being damaged, and ensures the safe operation of the whole set of chemical equipment.

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.

The present invention discloses a novel multi-ring fuel support plate injector, which comprises: at least two layers of annular support plates, which are coaxially arranged in the combustion chamber of a rocket engine, and the diameter of each annular support plate decreases along the air flow direction of the combustion chamber; each annular support plate has: an annular fuel channel, which is arranged inside the annular support plate; two circles of injection hole arrays, which are arranged on both sides of the annular support plate in an inner and outer circle, each circle of injection hole array contains a plurality of injection holes arranged evenly, and each injection hole is connected to the annular fuel channel; four equal straight support plates, each equal straight support plate is connected and arranged between each annular support plate, and a fuel supply channel is arranged inside each equal straight support plate along its direction. It solves the problems of uneven injection area and uncontrollable injection density of existing injectors.

The present invention discloses a metering solenoid valve for aerospace engine fuel supply system, including a valve body, the valve body having an upper chamber and a lower chamber; a pressure differential control valve core is arranged in the lower chamber, and the pressure differential control valve core divides the lower chamber into three independent spaces from left to right in the axial direction, namely a power chamber, a fuel outflow chamber and a flow chamber. The pressure differential control valve core is used to: when the pressure at the fuel outlet becomes smaller, move toward the power chamber side, so that the fuel in the power chamber flows into the fuel outflow chamber, reduce the throttling area between the first connecting channel and the fuel outlet, and increase the pressure at the fuel outlet; when the pressure at the fuel outlet becomes larger, the pressure differential control valve core moves to the right, increases the throttling area between the first connecting channel and the fuel outlet, and the fuel in the fuel outflow chamber flows into the power chamber, reducing the pressure at the fuel outlet. The metering solenoid valve for aerospace engine fuel supply system adjusts the pressure of the fuel outlet in real time, so that the pressure of the fuel outlet and the fuel inlet remain the same.