26results about How to "Reliable closure" patented technology

The invention discloses a relay which comprises a push rod assembly, a movable spring assembly and an elastic assembly. The movable spring assembly comprises a movable spring sheet, the elastic assembly is connected to the movable spring assembly and the push rod assembly, and the elastic assembly is used for providing contact pressure for the movable spring sheet; in the over-travel process, the push rod assembly extrudes the elastic assembly, and the push rod assembly has an over-travel initial position, an over-travel end position and a transition position between the over-travel initial position and the over-travel end position relative to the position of the movable contact spring. In the process that the push rod assembly moves from the over-travel initial position to the transition position, the elastic assembly has a first stiffness coefficient; in the process that the push rod assembly moves from the transition position to the over-travel ending position, the elastic assembly has a second stiffness coefficient, and the first stiffness coefficient is smaller than the second stiffness coefficient.

The utility model discloses a relay and an electricity meter. The relay comprises a static contact group and a movable contact group, and further comprises a movable magnetizer group and a static magnetizer. The movable magnetizer group and the movable contact group are relatively fixed, and the movable magnetizer group and the static magnetizer are oppositely arranged along the X-axis direction; the static magnetizer is fixed relative to one of other parts except the movable contact piece set and the movable magnetizer set, and static contacts of the two static contact pieces are located on the two sides of the static magnetizer respectively in the Y-axis direction. The projection of the part, suitable for making contact with the movable contact piece set, of each static contact on a second projection plane perpendicular to the Y-axis direction is located in the projection of the static magnetizer on the second projection plane, and the surface, facing the movable magnetizer set, of the static magnetizer is closer to the movable magnetizer set than all the static contacts in the X-axis direction. The electric meter comprises the relay. By adopting the above technical scheme, compared with the relay in the prior art, the relay is not easy to damage and has a longer service life.

The invention discloses a relay, which comprises a shell, a magnetic circuit part, a contact part and a pushing part, and is characterized in that the magnetic circuit part is mounted on the shell and comprises at least two magnetic circuit units; the contact part is arranged on the shell and comprises a movable spring group, a static contact group and a load terminal; the movable spring groups and the static contact groups are arranged corresponding to the magnetic circuit unit, and each movable spring group is provided with a movable contact group corresponding to the static contact group; each movable spring group and the corresponding static contact group jointly form a switch; the movable spring group and the static contact group in each switch are respectively connected with different load terminals, and at least one load terminal is shared by at least two switches and forms a common terminal; and the pushing part comprises a pushing piece accommodated in the shell, the pushing piece and the magnetic circuit unit are correspondingly arranged, and the pushing piece is driven by the corresponding magnetic circuit part to drive the corresponding movable spring group, so that the movable contact group and the corresponding static contact group are closed or opened. By adopting the technical scheme, the occupied space is smaller than that in the prior art for realizing the functions of more than two switches.

The utility model relates to the field of switching devices, in particular to a switching unit of a switching device and the switching device, the switching unit comprises a movable contact part, a static contact part and an arc extinguishing assembly, the movable contact part is arranged on an action execution assembly, the arc extinguishing assembly is linked with the action execution assembly, and the arc extinguishing assembly is linked with the action execution assembly along with closing or breaking of the movable contact part and the static contact part. The arc isolating part of the arc extinguishing assembly is selectively positioned at the avoiding position or the arc extinguishing position, so that the arc isolating part forms physical isolation of the movable contact part and the static contact part at the arc extinguishing position to extinguish the arc; the arc extinguishing assembly and the action execution assembly form linkage through a tooth-shaped transmission mechanism. The switching device is provided with the switching unit. The arc extinguishing assembly and the action execution assembly are linked to enable the arc isolating part to move along with the movement of the action execution assembly, effective arc extinguishing can be realized, timely abdication can be realized to facilitate reliable closing of the movable contact part and the static contact part, the tooth-shaped transmission mechanism works reliably, the working reliability of the arc extinguishing assembly is improved, and the service life of the arc extinguishing assembly is prolonged. And the switch unit is ensured to have a good arc extinguishing effect.

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 invention relates to the technical field of propellers, in particular to a hydraulic machining system suitable for a propeller grid electrode, which comprises a high-pressure oil source, an upper mold, a lower mold, a locking oil cylinder, a hydraulic lock, a mold temperature controller and a heating medium, a to-be-processed grid is arranged between the upper die and the lower die, and a closed cavity is formed between the to-be-processed grid and the lower die; a high-pressure oil source is connected with the closed chamber through a proportional pressure reducing valve and a one-way valve; a piston rod of the locking oil cylinder is connected with the lower die; the hydraulic lock is a bidirectional hydraulic lock and is connected with two oil cavities of the locking oil cylinder; the mold temperature controller is connected with the lower mold; and the heating medium is connected with the mold temperature controller through a pump. Through the hydraulic high-pressure forming technology, system heating is combined in the forming process, stable and reliable manufacturing forming of the grid is achieved, materials are saved, and the yield of the grid is improved.

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 present invention provides a forming mold and forming equipment for realizing full hemming of a mobile phone case, relates to the field of mold technology, and solves the problem that the hemming of a mobile phone case is easily damaged and deformed during the process of removing a plate. The forming equipment sets a first waist-shaped hole that is vertically through and a second waist-shaped hole that is horizontally connected to the inner flanging forming block of the forming mold for realizing full hemming of the mobile phone case, the second waist-shaped hole is inclined and extends upward at one end close to the forming groove, the outer guide rod is vertically movably arranged in the first waist-shaped hole, the top end of the outer guide rod is connected to the upper mold part, and the lower section is movably inserted into the second guide hole, and the transmission rod is horizontally arranged in the second waist-shaped hole and fixedly connected to the outer guide rod. The present invention mechanically links the outer guide rod with the inner flanging forming block through the second waist-shaped hole and the transmission rod. Compared with the prior art, it can ensure that the inner flanging forming block can automatically withdraw from the upper space of the forming groove, and avoid the situation where the hemming of the mobile phone case is damaged or deformed due to being blocked by the inner flanging forming block.

The utility model discloses a metering cabinet lead sealing mechanism which comprises a cabinet body, a cabinet door, a reset mechanism, a tamper-proof mechanism and a locking mechanism, the reset mechanism comprises a driving pin, a rotating disc, a first spring, a rotating ring and a driven sleeve, and the tamper-proof mechanism comprises a collection box, a rotating shaft, anti-counterfeiting paper, a clamping rod and a movable rod. The locking mechanism comprises a driving sleeve, an inserting rod, a second spring, a clamping block and a guide rod, under the mutual cooperation of the mechanisms, although the device has a complex internal structure, a user can achieve reliable sealing only through simple operation, special tools or skills are not needed, the sealing reliability is improved through the reset clamping design, and the sealing effect is good. A user and an inspector can confirm whether the closed state is intact or not through simple visual inspection, in addition, the device cannot be opened again after being closed, and it is ensured that goods cannot be accessed by unauthorized personnel in the transportation and storage process.

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.

The invention relates to a pump assembly (1), in particular a centrifugal pump assembly, comprising: a hydraulic housing (2); a suction nozzle (5) formed on the hydraulic housing (2) with an inlet opening (6); a pressure connection (7) formed on the hydraulic housing (2) with an outlet opening (8); a flow chamber (11) at least partially delimited by the hydraulic housing (2); a housing cover (3) closing the hydraulic housing (2); an impeller (14) arranged in the flow chamber (11) and drivable about an axis of rotation (A) via a shaft (9); and an inflow nozzle (17) having a first end (16) which is directly or indirectly connected to the hydraulic housing (2) and a substantially cylindrical section (18) which extends coaxially to the axis of rotation (A) in the direction of an inlet opening (6), a second free end (19) opposite the first end (16) is arranged in a recess (20) of the inlet opening (6) at a transition from the inlet opening (6) to the flow chamber (11), and a radial annular gap (21) is produced in the region of the recess (20) between a section (18) of the inflow nozzle (17) and the hydraulic housing (2). According to the invention, the section (18) is divided into a first partial section (22) and a second partial section (23) close to the free end (19), and in the region of the free end (19), the second partial section (23) comprises a sleeve-like or annular expansion element (24), the material of which has a higher coefficient of thermal expansion than the material of the hydraulic housing (2).

This utility model belongs to the technical field of oil well workover equipment, specifically relating to a rotary snap-fit ​​blowout preventer and workover rig. It includes a blowout preventer cylinder, which comprises a rotating housing and a fixed housing. A tubular support return pipe is fixedly connected to the fixed housing, and the inner cavity of the support return pipe communicates with the inner cavity of the blowout preventer cylinder. A hydraulic cylinder is installed at the upper end of the support return pipe, and the piston rod of the hydraulic cylinder is hinged to the rotating housing. A rotary bearing rotatably connects the lower end of the support return pipe to a rotary seat, and a rotary drive mechanism is installed on the side of the rotary seat. This utility model solves the problem of the need for subsequent liquid cleanup in existing technologies, fundamentally reducing environmental pollution and operational burden. It also overcomes the shortcomings of existing blowout preventers, such as high space requirements and proximity to the wellhead leading to limited manual operation, improving operational flexibility and safety, and achieving fully automated operation.

This utility model provides a dehydration device for beef processing, belonging to the field of beef processing technology. It includes a dehydration tank, a connecting plate installed at the bottom of the tank, a collecting base plate installed at the bottom of the connecting plate, a feed inlet at the top of the tank, a placement basket inside the tank, a discharge outlet at the bottom of the basket, and a telescopic component at the top of the collecting base plate for controlling the opening and closing of the discharge outlet. This utility model uses a drive component to rotate the placement basket at high speed, using centrifugal force to throw water out of the basket. The water falls into the dehydration tank through the basket's holes. During this process, an electric push rod pushes a truncated cone upwards, causing an annular groove to support the bottom of the basket, ensuring the discharge outlet is closed and preventing beef from falling during rotation. After dehydration is complete, the drive component stops, the electric push rod retracts, causing the truncated cone to descend. The bottom of the basket loses support, and under gravity, the beef falls through the discharge outlet into the collecting base plate for collection.

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.

The utility model provides a water purifier. The water purifier comprises a booster pump, a filter device, a check valve, a pressure detection device and a concentrated water electromagnetic valve, a water inlet of the booster pump is connected to the raw water inlet, the filter device comprises a water inlet, a purified water outlet and a concentrated water outlet, a water outlet of the booster pump is connected to the water inlet of the filter device, and a concentrated water opening of the filter device is connected to the drainage opening. A water inlet of the check valve is connected to a purified water outlet of the filtering device, a water outlet of the check valve is connected to the water taking opening, the pressure detection device is arranged on a pipeline between the water outlet of the check valve and the water taking opening and used for detecting the pressure of the pipeline, and the booster pump stops working when the pressure is larger than a preset threshold value. The concentrated water electromagnetic valve is connected in series between the concentrated water outlet and the water outlet of the filtering device and is opened when meeting a preset condition, and the preset condition comprises that the pressure is greater than a preset threshold value. The booster pump of the water purifier can be prevented from being repeatedly started and stopped under the condition that the modification cost is low.

The application discloses a relay, which comprises a push rod assembly, a moving spring assembly and an elastic assembly. The moving spring assembly comprises a moving spring leaf, and the elastic assembly is connected to the moving spring assembly and the push rod assembly and is used for providing contact pressure to the moving spring leaf. During overstroke, the push rod assembly extrudes the elastic assembly, and the position of the push rod assembly relative to the moving spring leaf has an overstroke initial position, an overstroke end position and a transition position between the overstroke initial position and the overstroke end position. During movement of the push rod assembly from the overstroke initial position to the transition position, the elastic assembly has a first stiffness coefficient. During movement of the push rod assembly from the transition position to the overstroke end position, the elastic assembly has a second stiffness coefficient, and the first stiffness coefficient is smaller than the second stiffness coefficient.