13results about How to "Reliable closure" patented technology

The invention belongs to the technical field of engineering quality detection, and discloses a low-disturbance combined ground breaking drilling tool for engineering quality detection, which comprises a connector connected with a power end, the connector is connected with a sampling mechanism, the sampling mechanism is connected with a ground breaking mechanism, and in the engineering quality detection, low-disturbance sampling is the key to guarantee the accuracy of detection data; in engineering quality detection, low-disturbance sampling is the key of accuracy of detection data; an existing drilling tool depends on redundant assemblies, is complex in structure, high in machining and maintenance cost and large in assembly error, stress is concentrated during rotation, large-amplitude swing is prone to occurring, hole walls and soil samples are squeezed and rubbed, and the original structure of the drilling tool is damaged. According to the drilling tool, modular pure mechanical design is adopted, the structure is simplified, and cost is reduced; spiral ribs and a soil unloading groove prevent soil from being gathered and extruded, and disturbance is reduced; an air eliminating hole balances pressure, and a hinged baffle and a baffle ring are automatically closed to keep a soil sample complete; the magnetic connector and the convenient soil sampling structure improve efficiency, low-disturbance sampling is achieved in the whole process, and it is ensured that detection data are reliable.

Provided is a valve capable of smoothly changing the pressure of a back pressure fluid. A valve (V1) is provided with: a housing (60) having a high-pressure space (S2) into which a high-pressure fluid (Pd) flows, back-pressure spaces (S3, S3 ') into which a back-pressure fluid (Pb) flows, and a low-pressure space (S1) into which a low-pressure fluid (Ps) flows; and a valve body (61) disposed in the housing (60) so as to be capable of relative movement. The housing (60) has a first passage (73) provided between the high-pressure space (S2) and the back-pressure space (S3) and a second passage (78) provided between the back-pressure space (S3 ') and the low-pressure space (S1), and the valve body (61) has a first valve body part (72) for controlling the opening degree of the first passage (73) and a second valve body part (77) for controlling the opening degree of the second passage (78). The first valve body part (72) and the second valve body part (77) are linked in such a manner that the respective movement directions are opposite in the opening direction and the closing direction.

The utility model belongs to the aquaculture technical field especially relates to a kind of filtering equipment for aquaculture circulating water, including circulating water filter cylinder, the water inlet and water outlet are respectively arranged in the upper and lower ends of circulating water filter cylinder, coarse filter screen and fine filter screen are sequentially arranged in the inside lower end of circulating water filter cylinder, the dismounting mouth is set up in the middle part of the front end of circulating water filter cylinder, supporting frame is installed in the middle part of circulating water filter cylinder, and the slow flow cylinder is placed on the supporting frame. By being provided with the dismounting mouth in the middle part of circulating water filter cylinder, and the slow flow cylinder that is attached to the inner wall of circulating water filter cylinder is installed in the dismounting mouth, the slow flow cylinder can be effectively prevented from tilting, the water flow is buffered and preliminary impurity separation is realized, and the impurities are intercepted in the collecting tank, then double sealing is formed by sealing plate and sealing sleeve, the airtightness during normal operation of equipment is ensured, and water leakage is effectively prevented.

Provided is an integrated and compact fluid control valve that corresponds to different fluid pressures, controls fluid at high speed with high accuracy in the case of low-pressure fluid flow, also exhibits high sealing force at the time of valve closure in the case of high-pressure fluid flow to reliably prevent leakage, can suppress a decrease in sealing performance to improve durability, and at the same time, can suppress the consumption of compressed air for driving while flowing fluid with a stable Cv value to prevent changes in flow rate. The divided pistons (23) are arranged in series with respect to the valve seat (13) in a resilient state by a plurality of spring members (24) that differ in spring load, an air supply port (25) is formed in the actuator (11), each piston is independently raised and lowered in the actuator with a predetermined stroke (Y1, Y2) by the compressed air from each air supply port or the resilient force of each spring member, and the valve body can be provided to seal the flow path with different sealing forces corresponding to the lowered state of each piston.

The invention discloses a construction method for a tunnel underneath passing through a weak silt layer, and belongs to the technical field of tunnel construction, and the construction method comprises the following steps: S1, setting an enclosure structure: constructing two temporary drainage ditches along two sides of a preset tunnel foundation pit, and constructing two groups of continuous vertical waterproof curtains between the two temporary drainage ditches; s2, layered excavation is carried out, wherein earth excavation is carried out to the position 0.2-0.4 m below the designed elevation of an inner support; installing a waist beam and erecting a cross arm at the designed elevation of the inner support; s3, secondary excavation and bottom plate sealing are conducted, specifically, excavation continues to be conducted to the designed bottom elevation of the foundation pit; s4, backfill soil construction is conducted, specifically, backfill soil is conducted in gaps between the two side walls and the enclosure structure; and S5, construction of an upper structure: after the inner support is removed, constructing an anti-collision wall at the top of the construction side wall, sealing and pouring the backfill soil on the two sides of the foundation pit, and finally removing the drainage ditch to restore ground traffic. The method has the effect of effectively controlling deformation and risks in the tunnel construction process according to the characteristics of the soft sludge stratum.

The invention relates to the technical field of laboratory equipment, in particular to a fresh air adjusting system for a clean room. Comprising air supply devices distributed at a ceiling of the clean room in an array mode, each air supply device comprises a shell, a draught fan unit, an air filtering unit and an airflow distribution unit, the draught fan units, the air filtering units and the airflow distribution units are sequentially arranged in the shells from top to bottom, each airflow distribution unit comprises a hollow sleeve, and each hollow sleeve is provided with a bottom air outlet and an annular side air opening. The flow guide cone is provided with a hollow channel and a flow guide slope, the flow guide cone is composed of a plurality of valves, the valves can swing in the radial direction around the lower connecting points of the valves, and an adjusting assembly used for driving all the valves to be synchronously unfolded outwards is arranged at the bottom of the sleeve. Through the annular backflow layer and the adjustable airflow distribution unit, dynamic switching between a composite flow field and vertical laminar flow is achieved, closed-loop circulation and distribution as required of clean air are completed, and global uniformity and process area stability are both considered.

The invention relates to an oil-cooled motor iron core structure, an oil-cooled motor and a rotary vane welding combination determining method. The oil-cooled motor iron core structure comprises a first assembly, a second assembly and a third assembly. The component I is laminated by a first punching sheet and a rotary sheet, a boss group is arranged on the outer circle side of the component I, and the boss group comprises a first type of boss with a welding groove and a second type of boss without a welding groove; in the first assembly, a first welding bead communicated with the cooling oil channel is formed through the interval between the boss sets, and an end butt welding bead isolated from the cooling oil channel is formed through welding grooves in the first type of bosses at the two axial ends of the first assembly. The assembly II and the assembly III are laminated by a second punching sheet and a rotary sheet, and an oil injection port and another welding groove are respectively formed in the assembly II and the assembly III; the other welding groove of the second assembly is aligned and communicated with the butt welding bead at the head end of the first assembly to form a second welding bead; the other welding groove of the third assembly is aligned and communicated with the butt welding bead at the end part of the tail end of the first assembly to form a third welding bead; the radial inner sides of the second welding bead and the third welding bead are blocked by the second type of bosses so that the second welding bead and the third welding bead can be isolated from the cooling oil channel.

The utility model relates to transmission case cylinder body lost foam casting technical field discloses an automobile transmission case cylinder body lost foam casting, including lower casting shell, both ends of lower casting shell left end are all rotationally connected with adapter plate no.

This utility model relates to the field of fire sprinklers, specifically a fire sprinkler head, including a receiving cavity and a closed cavity. The receiving cavity is vertically connected, and the closed cavity is fixedly disposed at the bottom opening of the receiving cavity to close the bottom of the receiving cavity. A movable frame is slidably disposed in the middle of the closed cavity, and a sealing plate with the same shape as the opening of the closed cavity is fixed at the bottom of the movable frame. The sealing plate can move with the movable frame to close the bottom of the closed cavity. The bottom of the closed cavity has multiple arc-shaped grooves with openings facing the center of the closed cavity and spiraling upward. Multiple adjusting blocks adapted to the shape of the bottom opening of the arc-shaped groove are fixed on the outside of the sealing plate. The beneficial effect is that by pushing the bottom sealing plate into the closed cavity, the adjusting blocks simultaneously enter the arc-shaped groove and slide along a spiral upward trajectory guided by the groove wall. After the pushing force disappears, the adjusting blocks slide in the opposite direction along the arc-shaped groove and lock into the locking groove. The sealing plate then descends to a preset position to close the bottom of the receiving cavity, realizing convenient shutdown of the fire sprinkler head after accidental triggering.

This invention relates to the field of sampling equipment technology, specifically to an intelligent sampling device for wheat distillers' grains fermentation. The intelligent sampling device includes a multi-stage sampling rod and an outer shell. The multi-stage sampling rod is composed of multiple sampling rods, which are nested and connected sequentially and slide relative to each other. The outermost sampling rod is nested inside the outer shell. Each sampling rod has a protruding conical portion in the middle of its segment, which cooperates with the buoyancy of the fermentation liquid. Both the sampling rod and the inner wall of the outer shell have grooved portions. Multiple liquid sampling ports are evenly distributed circumferentially at the conical angle of the conical portion of each sampling rod. A door is installed at each liquid sampling port, and a guide block is provided on the door. The door slides in cooperation with the grooved portion of the previous sampling rod or the outer shell through the guide block. This invention avoids sample mixing, improves sampling efficiency and accuracy, facilitates operation, and ensures sample purity.

A wiper blade (10) is proposed, particularly for use in motor vehicles. The wiper blade includes a wiper strip (12), a support element (14), a fluid channel (26), and a windshield strip (18). According to the invention, a sealing plug (36) closes the fluid channel (26) at at least one end (34) of the channel in the region of an end cap (22) without contacting the end cap.

The invention discloses a finished product sealing performance detection device for power cable terminal accessory processing, and relates to the technical field of power cable terminal accessory processing. According to the finished product sealing performance detection device for power cable terminal accessory processing, through the synergistic effect of the detection box, the box cover, the damping hinge, the clamping assembly and the airtightness detection assembly, efficient and accurate sealing performance detection of a power cable terminal accessory finished product is achieved, and the detection box serves as a main body structure and provides a stable detection environment; the box cover is connected with the detection box through a damping hinge, so that the box cover is convenient to open and close and can stay at any angle, and operators can place and take out accessories to be detected conveniently; the clamping assembly is responsible for firmly fixing the accessory and ensuring that the accessory does not displace or loosen in the detection process and the accuracy of the detection result is not influenced; and the airtightness detection assembly is used for judging whether the sealing performance of the accessory reaches the standard or not by filling or extracting gas into or out of the detection box and monitoring the change of internal air pressure.

This application discloses an engineering hydraulic oil tank, comprising: a tank body, equipped with a return oil pipe, an annular boss fixed to the inner wall of the return oil pipe, and a bypass hole vertically penetrating the annular boss; an end cap, detachably connected to the upper end of the return oil pipe, and equipped with a vertically penetrating first flow channel; a filter, including a filter part and a suspension part, the filter part being inserted into the inner side of the annular boss and matching the inner contour dimensions of the annular boss, the upper end of the filter part having an oil inlet, the suspension part being fixed to the filter part and equipped with a vertically penetrating second flow channel, the upper end of the second flow channel extending into the first flow channel and the lower end connecting to the oil inlet, the suspension part overlapping the annular boss and sealing the bypass hole, the second flow channel being equipped with a horizontally outwardly extending bypass groove, the lower end of the bypass groove being open and the upper end being closed, the bypass groove and the bypass hole being horizontally staggered; and an elastic part for applying a downward elastic force to the suspension part. This application can achieve an emergency bypass function while making filter maintenance convenient.