11results about How to "Prevent return" patented technology

The utility model provides a ground drilling, grouting and water plugging device suitable for a metal mine, and relates to the technical field of mine water disaster prevention and control, the ground drilling, grouting and water plugging device comprises a petroleum casing pipe, a grouting drill rod, a rubber umbrella cover, a first grouting device and a second grouting device, the grouting drill rod is arranged in the petroleum casing pipe; the rubber umbrella cover is arranged between the oil casing and the grouting drill rod, the grouting drill rod is sleeved with the rubber umbrella cover, and the arrangement height of the rubber umbrella cover is lower than the top end of the oil casing; the first grouting device is fixedly connected with the grouting drill rod through a pressure-resistant steel pipe; the second grouting device is fixedly arranged on the oil casing pipe, and the connecting position of the second grouting device and the oil casing pipe is lower than the bottom end of the rubber umbrella cover. External incoming water of a broken zone of a mining area can be blocked, the water inrush influence of excavation and construction is reduced, the grouting efficiency is improved, the slurry loss is reduced, and the service life of the mining area is prolonged. Therefore, excavation safety is guaranteed, and construction cost is reduced.

This invention relates to the field of animal husbandry technology and discloses a sealed modular pigsty, including a modular pigsty body, a load-bearing slatted floor, a V-shaped baffle, and an isolation and odor-proof unit. The isolation and odor-proof unit includes an air cushion isolation module, an isolation and odor-proof module, an anti-adhesion module, and a dry and wet separation module. By setting the air cushion isolation module, a horizontal air cushion layer is formed between the load-bearing slatted floor and the V-shaped baffle. The airflow pressure physically isolates heavy odorous gases such as ammonia and hydrogen sulfide produced by manure fermentation, preventing them from flowing back up along the gaps in the slats to the pigs' activity area. At the same time, the air blowing holes guide the airflow downwards to the inclined surface of the V-shaped baffle, pushing the manure and urine attached to the inclined surface downwards, reducing the residence time of manure and urine at the bottom, avoiding the problem of airflow short-circuiting or local negative pressure, and solving the technical problem of odor easily diffusing upwards from the bottom in traditional sealed modular pigsties, leading to a decline in indoor air quality.

This invention discloses a refueling pipe assembly with a throttling structure in the field of automotive fuel supply system technology. The assembly includes a refueling pipe and a circulation pipe. The circulation pipe has a throttling structure, which is a locally extruded deformation portion formed on the side wall of the circulation pipe. This deformation portion protrudes inward, forming a throttling orifice with a concave lens-shaped cross-section on the inner side of the pipe wall. An arc-shaped buffer section is provided between the throttling orifice and the outlet end of the circulation pipe. This invention can reduce refueling noise, simplify the throttling orifice process, and improve the reliability of the ORVR system.

This disclosure provides an optical module including a circuit board and an optical emitting component. The circuit board has an insertion port into which the optical emitting component is inserted. The optical emitting component includes a laser component array, which includes laser components. Each laser component includes a first substrate and a laser chip. The laser chip is mounted on the first substrate and is used to emit optical signals. A support plate is formed on the first sidewall of the insertion port, and the support plate is disposed along the length of the circuit board. The support plate and the first sidewall of the insertion port form a placement notch, and the laser component is placed at the placement notch so that the laser component and the support plate are arranged side by side along the width of the circuit board. The laser chip of the laser component is disposed at the end of the first substrate away from the first sidewall of the insertion port. The support plate is provided with signal pads, and the laser chip is directly wire-connected to the signal pads without the need for a transfer through the first substrate, thereby reducing the reflection loss of high-frequency signals and ensuring the high-frequency signal integrity of the optical module.

The invention provides a drainage intercepting device, which relates to the technical field of water resource management, and comprises a culvert box, an intercepting mechanism, a chain scraper conveyor, a bucket and a transfer mechanism, the closure mechanism is mounted in the culvert box; a through opening is formed in the top of the culvert box, mounting plates are mounted on the two sides of the top of the through opening, the chain plate conveyor is mounted between the two mounting plates, the top end of the chain plate conveyor extends out of the culvert box, the chain plate conveyor blocks a channel of the culvert box, one side of the chain plate conveyor faces water, and the other side of the chain plate conveyor faces water. The multiple buckets are installed on chain plates of the chain plate conveyor respectively. And the transferring mechanism is used for transferring and receiving the solids excavated by the excavator bucket. The chain scraper conveyor drives the excavator buckets on the chain scraper conveyor to dig solid pollutants in water flow on the upstream side and then convey the solid pollutants to the downstream side, the transfer mechanism receives the solids falling from the excavator buckets, concentrated collection of the solids is completed, unified cleaning of the solid pollutants is facilitated, and the problem that the solids of a traditional drainage facility are scattered and difficult to clean is solved.

The utility model discloses a drainage device for a water supply and drainage project, which belongs to the technical field of the water supply and drainage project, and comprises a drainage tank, an inner cavity of the drainage tank is provided with a component for preventing peculiar smell from returning upwards, the top of the inner cavity of the drainage tank is clamped with a filter pore plate, and two sides of the bottom of the filter pore plate are respectively provided with a fixing component. The bottom of the drainage tank communicates with a connecting pipe, the bottom of the surface of the connecting pipe is fixedly connected with a flange plate, the odor upward-returning preventing assembly comprises a fixing ring, the surface of the fixing ring is fixedly connected with a sealing ring, and the surface of the sealing ring is in close contact with the inner wall of the drainage tank. The problems that an existing drainage device usually cannot effectively prevent peculiar smell from returning upwards in the drainage process, the environmental air quality is affected, a filtering structure of the existing drainage device is usually fixed through bolts and is inconvenient to disassemble, and inconvenience is brought to cleaning work of workers when the filtering structure is blocked are solved.

This utility model discloses a sealing fluid system for a pressure vessel agitator, configured to provide sealing fluid to the sealing components of the pressure vessel agitator. The sealing components have a receiving cavity for containing the sealing fluid, including a storage tank, a delivery assembly, and a return assembly. The delivery assembly includes a delivery pump, with its inlet end connected to the storage tank and its outlet end connected to the receiving cavity. The return assembly includes a return pipe and a hydraulically controlled check valve. One end of the return pipe is connected to the receiving cavity, and the other end is connected to the storage tank. The hydraulically controlled check valve is positioned in the flow path of the return pipe, and its control port is connected to the outlet end of the delivery pump. When the outlet pressure of the delivery pump is less than a set value, the hydraulically controlled check valve closes the return pipe. This utility model can prevent the sealing fluid from returning to the storage tank via the return pipe when the delivery pump stops.

The utility model discloses an LED nixie tube glue pouring device which is characterized in that a base is connected to a rack, and glue discharging holes are formed in the base; the die holder is connected to the base, a plurality of glue pumping holes are formed in the die holder, a glue storage cavity is formed in the die holder, and the glue pumping holes are connected with the glue storage cavity; the transition block is in sliding fit with the base and the die holder, and a transition hole is formed in the transition block; a lifting device is connected to the top of the rack, a rod seat is connected to the power output end of the lifting device, a plurality of glue pumping rods are connected to the rod seat, one glue pumping rod is in sliding fit with one glue pumping hole, and the glue pumping holes correspond to the glue discharging holes up and down; the glue supply box is connected to the rack and communicates with the glue storage cavity. A supporting rod and a platform are connected to the rack, and the glue filling head is connected to the supporting rod and connected to the glue discharging hole; a push-pull device is connected to the platform and is in driving connection with the transition block. Compared with the prior art, the device can be used for filling glue into a plurality of nixie tubes at a time, so that the working efficiency is greatly improved.

This invention relates to the field of fish-attracting devices, specifically a multi-inlet fish-attracting device. The invention features unidirectional fish inlet channels at different heights of the unidirectional fish passage component. This increases the probability of fish from different water depths passing through, and ensures an underwater fish inlet even with changing water levels. This allows it to adapt to different water flow levels and simultaneously capture fish at varying depths. The opening and closing mechanism uses a linkage to close the fish outlet before the fish collection box approaches, effectively preventing fish from returning. Furthermore, the opening and closing mechanism does not interfere with the vertical movement of the fish collection box. The mechanism converts the linear motion of the fish collection box into the rotation of the fish gate and amplifies and transmits the swing angle of the bottom swing arm to the fish gate. The compact structure of the opening and closing mechanism is located inside the unidirectional fish passage, does not interfere with the fish collection box, and does not occupy space in the fish collection channel.

The utility model belongs to the technical field of medical instruments, and discloses a dilator which comprises an upper blade, a lower blade, a swing arm, a first hook and a second hook, the upper blade and the lower blade are rotatably connected through a first rotating shaft, the swing arm is rotatably connected to the lower blade through a second rotating shaft, and the axis of the second rotating shaft is parallel to the axis of the first rotating shaft. The first hook is arranged on the upper blade and can rotate around the axis of the first rotating shaft along with the upper blade towards the side close to the second rotating shaft until reaching a preset position, the second hook is arranged on the swing arm, the swing arm can rotate around the axis of the second rotating shaft, and the second hook can hook the first hook; the hooking position is located on the side, away from the second rotating shaft, of the first hook. According to the utility model, after the upper blade rotates relative to the lower blade to open the vagina to a preset space, medical staff can lock the upper blade and the lower blade only by controlling the swing arm to rotate, so that the upper blade is prevented from returning due to closing of the vagina, the operation is simple, and the use of the medical staff is facilitated.

The application belongs to the technical field of optics, and particularly relates to an anti-reflection laser beam expanding system and a laser processing device. The laser beam expanding system comprises, in sequence along a laser propagation direction, a laser, a concave lens, a convex lens, and at least two mirrors arranged on an optical path between the concave lens and the convex lens. An optical axis of the concave lens is arranged at an inclination angle alpha with respect to a main light ray direction of laser emitted by the laser, so that reflected light generated by the surface of the concave lens deviates from the optical path returning to the laser. The application solves the problem of power reduction or damage of the laser caused by the reflected light returning in the traditional beam expanding system, and improves the reliability and safety of the laser beam expanding system while realizing optical path folding and maintaining the compactness of the system.