36 results about "Double stop" patented technology

Valve assemblies and methods of designing valve assemblies having a valve ball, an upper seat, and a lower seat. When fluid pressure is applied to the valve ball, the valve ball will float in the axial direction between an upper position, a neutral position, and a lower position in response to fluid pressure. The valve assembly may be made suitable for internal blowout preventers.

A double stop-band super-broadband antenna basing on the asymmetrical spinous line belongs to the wireless communication technique field. The antenna comprises a medium board (1) and a metal printing antenna arranged at two sides of the medium board (1); wherein the front side of the medium board (1) is arranged with a microstrip feed port (2), a microstrip feed line (3), an asymmetrical spinous line (4) and a microstrip radiating element (5), the microstrip feed line (3) is arranged at the central axis of the medium board (1), the upper part of the microstrip feed line (3) is connected with a microstrip radiating element (5), the lower part of the microstrip feed line (3) is a microstrip feed port (2), and the two sides of the middle part of the microstrip feed line (3) are arranged with asymmetrical spinous lines (4); and the lower part at the back side of the medium board (1) is arranged with an earth unit (6). The invention can effectively cover the request frequency band of FCC, namely 3.1-10.6GHz, at the same time two stop-bands can be generated in the frequency band. The antenna of the invention has the characters of low cost, simple structure and small volume.

The invention relates to an ultra-wideband monopole antenna with double-stop band characteristics, which comprises a dielectric substrate [1]; a metal grounding plate [2] is printed on one side of the dielectric substrate [1], and a radiation unit [3] and a feed unit [5] are printed on the other side of the dielectric substrate [1]; the antenna is characterized in that: a. the radiation unit [3] is in a regular hexagon shape, and two C-shaped grooves [4] are carved on lower positions of the circle center of the radiation unit [3], and the C-shaped grooves [4] are open rings; b. the radiation unit [3] is directly connected with the feed unit [5]; and c. the metal grounding plate [2] is a ladder-shaped metal patch. The ultra-wideband monopole antenna with double-stop band characteristics has good ultra-wideband and double-stop band characteristics, and can eliminate the mutual impact with other narrow-band wireless communication systems; the double-stop band frequency is adjustable and can satisfy the application of special occasions; and the antenna has the advantages of small size, light weight, low consumption and simple structure, is applicable to mobile miniature equipment, meets the plane design requirements, facilitates the integration with an active circuit, has low cost, high precision and good repeatability, and can be well designed conformably with equipment in the similar regular hexagon shape.

An integrated double-flange combined ball needle valve comprises a valve body. Flanges on the two ends of the integrated valve is connected with a pipeline, two straight-through ball valves are arranged on the valve body, the ball bodies of the two ball valves is placed in the valve body, the first ball valve is connected with a first flange end cover installed on the left of the valve body, the second ball valve is connected with a second flange end cover installed on the right of the valve body, a meter needle valve is arranged in the middle position of the two ball valves of the valve body, and the lower end of the valve body is a discharge port. A medium enters the first ball valve from the inlet of the first flange end cover, the meter needle valve and a plug take the effects of discharging, sampling, measuring pressure, shunting and configuring a converter, the first ball valve is a main stop valve, and the second ball valve can stop and reverse flow, and enable a pressure meter to reset to zero for a secondary medium. The combined ball needle valve has double stopping double discharging functions, and is suitable for pipeline devices with the functions of stopping, adjusting, discharging, sampling and so on.

Valve assemblies and methods of designing valve assemblies having a valve ball, an upper seat, and a lower seat. When fluid pressure is applied to the valve ball, the valve ball will float in the axial direction between an upper position, a neutral position, and a lower position in response to fluid pressure. The valve assembly may be made suitable for internal blowout preventers.

When the on-on time between Note 1 and Note 2 is shorter than the double stop judgment time JT, as shown in FIG. 3A, the mode is changed from Unison 1 to Unison 2. When note-on information of Note 1 is inputted at time t1, the parts 1-4 are assigned to Note 1, and simultaneously start sound generation at pitch n1, as shown in FIG. 3B. Next, when note-on information of Note 2 at pitch n2 lower than Note 1 is inputted at time t2, the mode is switched to Unison 2. Part 1 (with the timbre being trumpet) and Part 2 (with the timbre being clarinet) which are higher in the pitch order are assigned to Note 1, and continue generating the musical sound at pitch n1 of Note 1, and Part 3 (with the timbre being alto saxophone) and Part 4 (with the timbre being trombone) which are lower in the pitch order are assigned to Note 2, stop the sound generation at pitch n1, and start sound generation at pitch n2 of Note 2.

The invention discloses a cylindrical roller bearing capable of bearing a bidirectional axial force. The cylindrical roller bearing comprises a cylindrical roller bearing inner ring, a cylindrical roller and a cylindrical roller bearing outer ring; stopping edges for preventing the cylindrical roller from axially moving are respectively arranged on the outer cylindrical surface of the cylindrical roller bearing inner ring and the inner cylindrical surface of the cylindrical roller bearing outer ring; the cylindrical roller bearing outer ring is connected and combined through internal threads and external threads by two rings along the axial direction to form a whole; and two stopping edges are respectively arranged on the two rings. The cylindrical roller bearing outer ring is formed by combining two parts with the stopping edges and double stopping edges are arranged on the cylindrical roller bearing inner ring, so that the bearing can bear the bidirectional axial force and the bearing force is greater; the cylindrical roller bearing capable of bearing the bidirectional axial force is formed by being improved on the basis of the traditional cylindrical roller bearing and is combined in a threaded connection mode; the cylindrical roller bearing has a simple structure and is easy to manufacture; the nominal contact angle of the cylindrical roller bearing is 0 degree; the roller is linearly contacted with the rollways and has strong bearing capacity; and during rotating, the influence of the centrifugal force on the cylindrical roller bearing is less, so that the limiting speed of work is higher.

A hand puller with the structure of double stopping plates is disclosed. An axle part goes through a fixing part and a pulling part. Both ends of the axle part have a ratchet, respectively. The fixing part has two stopping plates, fixed to the two opposite sides of the axle part. The pulling part has a driving claw. The driving claw and the stopping plates of the fixing part engage with the ratchet.

The invention discloses an unlocking and locking device resistant against inverse motion impact. The unlocking and locking device resistant against inverse motion impact comprises a double-stopping-surface stopping toothed plate (3) and a double-stopping-surface shifting wheel (4), wherein the double-stopping-surface stopping toothed plate is provided with a left stopping surface and a right stopping surface which are independent, and the double-stopping-surface shifting wheel is provided with a claw stopping surface and an auxiliary stropping surface. In the process of working, the double-stopping-surface stopping toothed plate and the double-stopping-surface shifting wheel form double-stopping-surface supporting due to the fact that the left stopping surface and the right stopping surface respectively abut against the claw stopping surface and the auxiliary stropping surface, the inverse motion impact of a seat is resisted through the characteristic that two stopping surfaces are balanced in stress, and the unlocking trend of the shifting wheel is eliminated. The defects of poor resistance against inverse motion impact and unreliable locking in the prior art are overcome, and a car seat manual angle regulator achieves the purposes of improving inverse motion impact resistance and being reliable in locking by means of double-stopping-surface supporting.

The invention relates to a method for acquiring a traffic capacity of a circular intersection with double stop lines and signal control. The method comprises the following steps of: 1) acquiring geometric design parameters of the intersection; 2) acquiring signal control parameters of the circular intersection with the double stop lines and the signal control; 3) separately calculating the trafficcapacity C<d> of a straight lane of an approach, the traffic capacity C<l1> of left turn vehicles passing a first stop line, the vehicle storage capacity C'<l2> of two regions of a left turn lane, and the traffic capacity C<l2> of the left turn vehicles passing a second stop line of the circular intersection with the double stop lines and the signal control; 4) acquiring the traffic capacity C<l>of the left turn lane of the circular intersection with the double stop lines and the signal control according to the left turn vehicles passing the first stop line and second stop line; and 5) calculating a total traffic capacity C of the single approach of the circular intersection with the double stop lines and the signal control. Compared with the prior art, the method has the advantages of simple calculation, considering the constraints of the capacity of a roundabout on the traffic capacity of the left turn lane, wide applicability and the like.

The invention discloses a double stop line traffic system for road intersection. The system comprises a pedestrian crossing arranged at an intersection; an opposite direction carriage-way boundary, aconventional guide lane, a running guide marked line, a codirectional carriage-way boundary and a second traffic light are arranged on a road; a primary stop line, a secondary stop line, a diversion lane boundary, a variable diversion lane and a lane changing guide line are arranged on at least one road on the inlet side of the intersection; and a matched first traffic light manner is arranged onthe road in front of the primary stop line. The invention further discloses an application method of the system. The system has the advantages that vehicle can firstly run into the variable diversionlane for waiting running before the road turns left or straight running is released, the vehicle successively passes the intersection through the variable diversion lane after the road turns left or straight running is released, the fact that the vehicle passes the variable diversion lane is realized during driving, the traffic volume at the intersection can be doubled approximately, the traffic mode is simple and efficient, and the traffic pressure at the intersection of an urban road can be greatly reduced.

The invention provides a multi-frequency multiplication double stop-band filter, solving the problem that the passband bandwidth of a normal stop-band filter is relatively narrow and a multi-frequency multiplication ultra wide band stop-band filter multi frequency multiplication is difficult to realize. The multi-frequency multiplication double stop-band filter is characterized in that a coupling rod (2) is connected with a plurality of parallel resonators (6) to form a first stop-band filter; the resonators (6) are normalized frequency generators, and are used for generating frequency signals in a cavity (1); the coupling rod (2) is a plurality of serial normalized couplers; the coupling rod (2) is connected with a second stop-band filter through a microstrip line (4); the second stop-band filter is formed by a plurality of serial and parallel LC resonators (5); and the output of the first stop-band filter is transmitted to the LC resonators (5) of the second stop-band filter again through the microstrip line (4).

The invention provides a globoidal cam mechanism capable of achieving 180-degree reciprocating intermittent swing. The globoidal cam mechanism mainly comprises a globoidal cam body fixedly connected to an input shaft and a swing disc assembly fixedly connected to an output shaft. The swing disc assembly comprises a swing disc and four rollers. The axes of the rollers are all perpendicularly intersected with the axis of the swing disc. An included angle between the adjacent roller axes is 60 degrees. Convex ridges on the cam body are engaged with the rollers. The convex ridge outlines are divided into two intermittent period segments and two swing period segments in the process that the cam body rotates by a circle. The convex ridge outlines within the two swing period segments each comprise three sections of spiral convex ridges, and thus the swing disc can be made to swing by 180 degrees. The convex ridge outlines within the two intermittent period segments are both toroidal surfaces which are located at the two shaft ends of the globoidal cam body correspondingly. In the process that the cam body rotates by one circle, the swing disc is sequentially subjected to clockwise swing, primary intermitting, anticlockwise swing and secondary intermitting, thus, 180-degree reciprocating intermittent swing is achieved, and the double-stop movement rule is achieved.

The invention relates to a novel ultra wide band monopole antenna. The novel ultra wide band monopole antenna comprises a patch antenna 1 (comprising a rectangular radiation unit and a feeder line), a medium base plate 2, a 5.75GHz phase step resonator 3, a 8.4GHz phase step resonator 4 and a grounding plate 5, and is characterized in that resonance structures are added on the two sides of the feeder line of the antenna so that a double-stop-band function is realized; the radiation unit of the antenna is in a rectangular patch structure and the grounding plate is partially cut. With the adoption of the antenna, the ultra wide band transmission property (VSWR is less than 2) from 3.1GHz to 10.6GHz is realized, and the two narrow band frequency bands of 5.3-5.9GHz and 8.1-8.8GHz form two stop bands so that the interferences between the two frequency bands are effectively reduced.

When the on-on time between Note1 and Note 2 is shorter than the double stop judgment time JT, as shown in FIG. 3A, the mode is changed from Unison 1 to Unison 2. When note-on information of Note 1 is inputted at time t1, the parts 1-4 are assigned to Note 1, and simultaneously start sound generation at pitch n1, as shown in FIG. 3B. Next, when note-on information of Note 2 at pitch n2 lower than Note 1 is inputted at time t2, the mode is switched to Unison 2. Part 1 (with the timbre being trumpet) and Part 2 (with the timbre being clarinet) which are higher in the pitch order are assigned to Note 1, and continue generating the musical sound at pitch n1 of Note 1, and Part 3 (with the timbre being alto saxophone) and Part 4 (with the timbre being trombone) which are lower in the pitch order are assigned to Note 2, stop the sound generation at pitch n1, and start sound generation at pitch n2 of Note 2.

The invention discloses a double-sided synchronous positioning device for bearing seat CNC milling machine processing, which includes a processing table, a rotating mounting table, a fixed block, a positioning pin and a double-sided limiting device. The middle of the upper part of the rotating installation table is fixedly connected with a fixed block; twist the rotating handle so that the movable arm can only move towards the direction of the bearing seat, quickly limit the position of the bearing seat, improve the positioning efficiency of the bearing seat, and make the bearing seat located on both sides The bearing seat is positioned at the same time, so in the process of processing, the rotating mounting table can be rotated 180° after processing one bearing seat, which is convenient for processing the bearing seat on the other side and improving the processing efficiency. At this time, the pressing protrusion no longer limits the pressing column, so that the rotating mounting table is convenient to rotate, and the rotation and fixing of the rotating mounting table are conveniently adjusted.

The invention relates to a stereo rolling wheel type double-layer parking device which comprises an electric motor, a rack and two groups of transmission wheels. Each group of transmission wheels areinstalled on the rack through a rotary shaft. The lower sides of the two groups of transmission wheels are hinged to a first horizontal parking plate, and a connecting rod is hinged between the transmission wheels on the same side of the first horizontal parking plate. The electric motor is connected with two winding drums through a worm wheel and worm speed reducer, the winding drums are connected one of each group of transmission wheels through a transmission rope, the other of each group of transmission wheels is hinged to one end of a second parking plate, and the other end of the second parking plate are connected to two connecting rods. After an automobile is parked on the first parking plate, the winding drums are driven to rotate through the worm wheel and worm speed reducer, the transmission ropes fixed to the surfaces of the winding drum are wound around the surfaces of the winding drums and pull the transmission wheels to rotate so as to make the first parking plate move upward, the second parking plate can continue to park at the moment, and the electric motor can be reversely turned during automobile taking. The stereo rolling wheel type double-layer parking device canachieve double-layer automobile parking and taking, effectively utilizes space and saves occupied area.

The invention discloses a method for calculating the permeability of tight sandstone based on nuclear magnetic resonance double cut-off values. By measuring the nuclear magnetic resonance attenuation curves of tight sandstone in the state of complete water and irreducible water, they are inverted into T2 spectrum, and the two states are compared. Under the NMR T2 spectrum, determine the NMR cut-off values ​​for absolutely mobile water and absolutely immovable water. On this basis, the relationship between absolute movable water content, absolute immovable water content and permeability is analyzed, and a permeability model based on double cut-off values ​​of nuclear magnetic resonance is established. The invention fully considers the contribution of different pore components to seepage, and improves the prediction accuracy of tight sandstone permeability.

The invention mainly relates to melon pulp-excavating seed-extracting juice-making machine equipment, belongs to agricultural machinery, and particularly relates to a melon pulp-excavating machine. The machine mainly comprises a melon feeding mechanism, a melon insert frame indexing mechanism and a pulp excavating cutter lifting mechanism, and is mainly characterized in that an oscillating bar (4) of the melon feeding mechanism and a shaft (6) are hinged at a position of three fourths of the oscillating bar, the long end of the oscillating bar is sleeved on a sliding sleeve (4), the short end of the oscillating bar is tangential to a disc cam (5), a guide rail (40) and a cutter (38) are fixed on a rack (1), a support (39) is hinged with the sliding sleeve (41), the 2 round pin-4 fluted roller shaft (9) and a 2 round pin-4 fluted roller shaft (11) of the melon insert frame indexing mechanism are connected with two melon insert frames (12) through flat keys, the included angle of the two melon insert frames on a fluted roller shaft is 180 degrees, a plain-based disc cam (19) of the pulp-excavating cutter lifting mechanism is designed to be double-stopping distance, an excavating cutter (13) is connected with a motor II (17) through a flange coupling (16), an excavating cutter rest guiding sleeve (14) is fixed on the frame (1), the melon feeding mechanism adopts the disc cam mechanism of a oscillation type driven part, the melon insert frame indexing mechanism adopts a 2 round pin-4 fluted roller shaft roller mechanism, the pulp-excavated cutter lifting mechanism selects transmission of a plane-bedded driven part disc cam mechanism, the action of each mechanism ensures coordination and consistence, in a circle of roller shaft rotation, the melon is fed twice, a pulp-excavation position adopts upper pulp excavation, and the support of a semi-seed melon is stable when the pulp is excavated, and the size of the machine in the length direction is reduced simultaneously.

The invention discloses a double cut-off anti-theft sampling valve, which comprises a valve body, two closing parts are rotatably installed in the valve body, and a sealing ring is set on the closing part, and the closing part passes through the sealing ring and the inner wall of the valve body. Sliding and sealing fit, two valve seats are welded on the outer wall of the valve body, and the two valve seats are adapted to the positions of the two closing parts respectively, and two A first rotating hole that is adapted to the position of the two closing parts respectively, and a rotating post is installed in the first rotating hole, one end of the rotating post passes through the sealing ring and is welded on the closing part, and the rotating post's The other end is provided with a thread groove, and the side of the valve seat away from the valve body is provided with a placement groove. The present invention can be easily disassembled and assembled, thus can be easily maintained or replaced, can play an anti-theft function, has a simple structure, and is convenient to use.

The invention relates to a full-automatic metal particle double-top-stopper machine, which comprises a stand, wherein a tape passing device, a tape conveying device, a crochet locating device, tape dividing devices, a top stopper device, a vibrating loading device and a controller are arranged on the stand; and by virtue of two tracks of the vibrating loading device, one or two metal particles can be simultaneously fed into the top stopper device, so that an effect of simultaneously mounting one or two metal particles is achieved and an overall production efficiency is improved. Meanwhile, with the application of the conveying part, the number of the metal particles entering an accommodating space of the top stopper device in each time is limited, so that mechanical failure is prevented. With the design of tape dividing heads, a zipper tape can be turned upwards by an appropriate angle, so as to facilitate mounting of the metal particles in the top stopper device.

The invention relates to a refrigeration device comprising an ice maker (110) which has a rotatably mounted ice cube tray (202) about a rotational axis. According to the invention, the ice maker (110) comprises two stops (206) for limiting the rotational movement of the ice cube tray (202) about the rotational axis (D).

The invention discloses an online paraffin removal system of a crude methanol filtration system. The online paraffin removal system comprises a filter. A crude methanol inlet pipeline is connected to a lower inlet of the filter, and an upper outlet of the filter is connected to a crude methanol discharge pipeline. The online paraffin removal system is characterized in that the top of the filter is connected with a low pressure steam pipeline, a first double stop valve is arranged at the top of the filter, one end of the first double stop valve is connected to a top exhaust port of the filter, the other end of the first double stop valve is connected with the low pressure steam pipeline, a second double switching valve is connected to a bottom drain port of the filter, a branching pipe is connected to an outlet of the second double switching valve, one branch pipe of the branching pipe is connected to a crude methanol recovery tank, and the other branch pipe of the branching pipe is connected to a paraffin collection net. The online paraffin removal system has the advantages that the online paraffin removal system has a simple structure and a low cost, the potential safety hazards in paraffin clogging, cutting and washing of crude methanol filters are effectively avoided, and the paraffin cleaning process is safe and efficient.

The invention discloses a trigger-type anti-seismic double block device for a bridge, which comprises a concrete block formed by extending upwards at both ends of a cover beam, and a pre-embedded steel plate is arranged inside the concrete block; on the cover beam between the concrete block and the main beam The surface is fixed with a steel box, and the steel box is provided with an opening that penetrates up and down. A short stop is inserted in the opening, and the length of the upper end of the short stop protruding from the steel box is greater than the depth of the pit; the bottom of the steel box deviates from the hole And the upper surface of the cover beam that is biased to the outside of the bridge is provided with a pit with a size slightly larger than the cross-sectional size of the short stop; there is a gap between the steel box and the main beam, and an elastic-plastic deformation device is fixed between the steel box and the embedded steel plate. The invention can make the upper structure of the bridge have a self-resetting function under the action of medium and small earthquake loads, and can effectively dissipate the seismic energy under the action of strong earthquakes and trigger the second stopper to participate in earthquake resistance, thereby reducing the occurrence of lateral beam falling accidents, thereby improving The seismic performance of the bridge structure is improved, and the manufacturing layout is simple and the cost is low.

The invention discloses a double-stop discharge needle-shaped valve which comprises a valve body inlet, a main stop valve and a needle-shaped valve, wherein a main valve body is provided with the valve body inlet which is connected with an internal pipeline interface; an internal pipeline is provided with three interfaces, and the other two interfaces are respectively connected with one end of the needle-shaped valve and one end of a secondary stop valve; the other end of the needle-shaped valve is connected with a main discharge hole, and the other end of the secondary stop valve is connected with a secondary discharge hole; and the main stop valve is provided with a flange self-locking device. The double-stop discharge needle-shaped valve has the beneficial effects being simple in structure, low in production cost and diversified in valve control functions, and guaranteeing the safety of the valve due to the self-locking device.

The invention provides a bidirectional blocking valve which comprises a pneumatic actuator. The pneumatic actuator is a group of air cylinders. The air cylinders are sealed by an upper cover and a lower cover which are combined. Each air cylinder is separated into an upper air chamber and a lower air chamber by a piston, an upper air nozzle and a lower nozzle are respectively used for inflating and deflating the two air chambers, and the piston moves up and down under the inflating pressure of the air nozzles. The double-block valve seat is characterized in that movable shafts at two ends of each piston, first seal rings (04u and 04d), and a second seal ring form a movable shaft air chamber, and the air in the air cylinder always emits through the air chamber. The bidirectional blocking valve has the advantages that bidirectional blocking of the pistons of the pneumatic actuator is achieved, namely bidirectional blocking of a valve seat and a valve element is achieved, impact of the valve element on the valve seat is reduced, namely buffer effect is achieved at the moment when the valve element is about to contact with the valve seat, the valve element, the seal rings, and the valve seat are protected from being damaged by impact, noise is reduced, and the service life of a product is prolonged.