18 results about "Stopcock" patented technology

This invention discloses a slow-release sealing device, comprising: an installation tube having an injection port and a reservoir cavity that communicate with each other; the installation tube being connected to a stopcock end to connect the injection port to an indwelling needle; a pressure valve disposed within the injection port; and a fluid-pushing assembly including a pusher component disposed in the reservoir cavity that performs piston-like movements, the pusher component having a protrusion and a puncture tip; wherein the puncture tip punctures the pressure valve to form a pressure cavity. The slow-release sealing device provided by this invention utilizes the pressure valve disposed within the injection port of the installation tube and the pusher component disposed within the reservoir cavity. The installation tube can be installed onto the stopcock end of the indwelling needle, at which point the injection port communicates with the indwelling needle. The reservoir cavity pre-stores sealing fluid, allowing the pusher component of the fluid-pushing assembly to slide along the reservoir cavity, causing the sealing fluid to gradually enter the indwelling needle from the injection port through the pressure valve, thereby achieving a sealing effect on the indwelling needle and overcoming the problem of blood clotting and clogging of the indwelling needle after limb activity.

The application relates to a labor-saving thread port stop valve, belonging to the technical field of valves, which comprises a valve body with two open ends in the axial direction, a valve seat integrally connected to the middle part of the valve body, and a plunger movably installed in the valve body, a regulating seat is vertically connected to the middle part of the valve body, a hand wheel is rotationally connected to the top of the regulating seat, the hand wheel is screw-threadedly provided with a valve rod with one end connected to the plunger along the axis, the valve seat is provided with a through hole with a top end and a bottom end respectively communicated with the inlet and the outlet of the valve body, the plunger comprises a valve cover rotationally arranged at the bottom of the valve rod and an auger rotationally arranged at the other side of the valve cover, a plurality of fan-shaped pressure relief holes are arranged on the valve cover in the circumferential direction, sealing covers are rotationally arranged at the positions of the pressure relief holes, movable connecting assemblies are arranged between the sealing covers and the auger, and the valve body is provided with locking devices for rotationally limiting the sealing covers. The application can greatly reduce the resistance received by the plunger when the thread port stop valve is opened and closed, so that the opening and closing operation of the valve body is more labor-saving.

The technical problem this invention aims to solve is to provide an automatic flow rate switching valve for biomolecular chromatography. This automatic flow rate switching valve's dynamic response mechanism can precisely match the flow rate requirements of different stages after chromatography, ensuring sufficient injection of cleaning solution and timely discharge of high-salt solutions to avoid residue, effectively reducing manual intervention and operational errors. The device includes a main inlet pipe connected to the inlet pipe of the chromatography system, with six branch inlet pipes. Each of the six branch inlet pipes is equipped with an identical valve body control structure, including a stopcock valve and a flow rate switch control structure. The flow rate switch control structure opens or closes the corresponding stopcock valve according to the different flow rates of the main inlet pipe. Different cleaning solutions are injected through the six branch inlet pipes, and the corresponding stopcock valves can be opened or closed according to the different flow rates of the main inlet pipe, allowing different cleaning solutions to be injected at different cleaning stages for thorough cleaning.

A spring switch for an insulated container lid includes: a top tube, a support tube, a sliding groove tube, a movable plug spring, a movable plug, a stopcock, a push rod spring, a movable plug shaft seal ring, and a movable plug seal ring. A movable plug spring is located between the support tube and the movable plug. The movable plug is fitted with the movable plug shaft seal ring and the movable plug seal ring in sequence. The movable plug is mounted on the axis of the stopcock. A push rod spring is fitted onto the movable plug. A retaining ring is located at the top of the movable plug. The top tube and the support tube are sequentially fitted into the sliding groove tube. The bottom of the top tube has a ring of top tube ribs, and the outer side of the bottom of the support tube has a ring of limiting ribs. The beveled teeth on the top tube ribs cooperate with the beveled teeth on the limiting ribs. The inner side of the sliding groove tube has low-limit beveled teeth, and the upper part has a high-limit retaining groove. The advantages of this invention are: good modular component versatility, solving product noise or leakage problems, simple structure, no need to blindly increase component precision, reduced production costs, and guaranteed product quality.

A medical stopcock assembly with position detection includes a medical stopcock and a sensor. The medical stopcock may include a main body and a valve body. The valve body may define a valve passageway and be moveable relative to the main body between a first position where a first input port and an output port are in fluid communication via the valve passageway, a second position where a second input port and the output port are in fluid communication via the valve passageway, and a third position where the second input port and the first input port are in fluid communication via the valve passageway. An external surface of the valve body may include a position structure. The sensor may be configured to sense the position structure to determine whether the valve body is in the first position, the second position, or the third position.

This utility model relates to a heat exchanger, specifically, to an easy-to-clean, anti-clogging marine heat exchanger. It includes a heat exchanger housing, with two inlet pipes fixedly installed on the outer wall of the housing. A filter assembly is located at the other end of each inlet pipe. The filter assembly includes a housing, with a drain pipe fixedly installed on one side of the housing. The other end of the drain pipe is fixedly connected to the inlet pipes via a flange. A stopcock is threaded to the bottom of the housing. With this utility model, the operator can quickly unlock and open the cover by holding and rotating the wing nut with one hand. The return spring then automatically rebounds, pushing the top block upwards to lift the filter basket, breaking the static friction between the retaining ring and the positioning ring. This causes the filter basket to rise and disengage from its original clamping position, allowing personnel to easily remove it for washing and maintenance via the handle. This enables rapid disassembly and cleaning of the filter basket, improving maintenance efficiency and ensuring the long-term anti-clogging performance of the heat exchanger.

This invention relates to the field of valve processing equipment technology, specifically disclosing a combined processing equipment for a cone valve core of a plug valve. The equipment includes a base, with two bases symmetrically arranged. A cover plate is fixedly connected to the upper surface of each base. It also includes a rough polishing mechanism fixedly mounted on the base and a fine polishing mechanism fixedly mounted on the rough polishing mechanism. After the valve core enters the processing groove, it gradually contacts and is compressed against the elastic telescopic seat at the bottom. This results in a high-pressure state inside the elastic telescopic seat after the valve core is installed, thereby transmitting its internal air pressure to the elastic telescopic rod. This causes the elastic telescopic rod to expand, pushing the clamping plate to converge and cover the top outer surface of the valve core. This achieves automatic alignment of the valve core's central axis after it enters the processing groove, ensuring that the valve core remains vertically positioned during subsequent grinding. This guarantees effective contact between the outer surface of the valve core and the rough polishing plate, thereby improving the grinding effect on the valve core.

This invention discloses a disposable closed-loop lumbar puncture pressure measurement and sampling integrated device and its pressure measurement method. The device includes: a first Luer interface connected to a lumbar puncture needle or lumbar drainage catheter, a second Luer interface connected to a sampling container, and a valve assembly disposed between the two interfaces. The valve assembly has a pressure measurement path, a sampling path, and a closing path, and can achieve multi-position switching through a stopcock or slide valve. The pressure measurement path is connected to a pressure indicator component, which transmits pressure through a diaphragm coupled to the cerebrospinal fluid (CSF) but is not directly connected to the CSF. The pressure indicator component can display the CSF pressure within a range of 0-60 cm H2O. The valve assembly preferably has a bubble trapping chamber and / or a flow limiting structure to reduce the influence of air bubbles on the reading and reduce the risk of rapid fluid release due to misoperation. This invention can achieve closed-loop pressure measurement without a long tubing column in the lateral decubitus position, and can complete CSF sampling within the same sterile closed loop, reducing the chance of external contamination, reducing sample waste, and simplifying the operation process.

The utility model discloses a valve body structure with an adjustable lip edge, which comprises a body, the lip edge and a fastener, a cock cavity is concavely arranged on the upper surface of the body, a flow channel communicated with the cock cavity is arranged on the side edge of the body, the lip edge is arranged in the flow channel, and the lip edge and the body are fixed through the fastener; a first fixing edge is radially and inwards convexly arranged in the flow channel, a second fixing edge is radially and outwards convexly arranged at one end of the lip edge, an adjusting gasket is arranged between the first fixing edge and the second fixing edge, and a fastener is connected with the first fixing edge and the second fixing edge. According to the valve body structure, the lip side and the body are of a split assembly structure, so that parts are standardized, universality is improved, machining difficulty is lowered, consistency of the size of the valve body is guaranteed, and the percent of pass of the valve body is improved; meanwhile, the time cost of surfacing, manual polishing and the like is saved, and the manufacturing cost is reduced.

This invention provides a high-efficiency wastewater settling and reuse tank, effectively solving problems such as low cleaning efficiency, easy clogging of packing materials, and insufficient separation effect that easily occur when settling and reusing solid-liquid mixtures such as coal slime reuse water and sludge reuse water. An intermediate packing box divides the tank shell into a settling tank and a reuse tank; backwashing groups are provided on both sides of the intermediate packing box; the settling tank is equipped with an inlet and a outlet; the reuse tank is equipped with an outlet and a discharge port; a stopcock is installed on the tank shell; a mounting bracket is fixed to the top of the tank shell; a sealing ring and a cleaning plate are fixed to the bottom of the sealing plate; the bottom of the connecting shaft is hinged to the sealing plate; a handwheel is rotatably mounted on the outer cylinder seat; a threaded sleeve is rotatably mounted inside the outer cylinder seat, and the threaded sleeve is fixed to the handwheel; the threaded sleeve has a threaded hole, and a lead screw is installed in the threaded hole; a mounting plate is fixed to the lower part of the outer cylinder seat, and the mounting plate is fixed to the mounting bracket; the top of the lifting rod is connected to the lead screw, and the bottom of the lifting rod is fixed to the top of the connecting shaft.

The utility model discloses a kind of reinforcing sealing structure for cock valve stem, including pressure ring, inner sealing ring, outer sealing ring, pressure disc and jacking bolt, inner cavity is formed between valve stem and bonnet, pressure ring, inner sealing ring, outer sealing ring and pressure disc are set on valve stem, and are placed in inner cavity;Jacking bolt is set on bonnet and acts on pressure disc, the upper surface of pressure ring is provided with convex part, first slope and second slope are set between pressure ring and convex part, outer sealing ring and inner sealing ring are respectively set in first sealing cavity and second sealing cavity, outer sealing ring is provided with the third slope matched with first slope, inner sealing ring is provided with the fourth slope matched with second slope. By setting inner sealing ring and outer sealing ring, and setting slope in the connecting portion of pressure ring and convex part, the downward jacking force of jacking screw is partially converted into radial force by slope cooperation, so that first sealing surface and second sealing surface are tightly attached, and sealing performance is improved.

This invention discloses a pressure-adaptive opening and closing control method and system for a plug valve, comprising: determining the critical opening value data of the plug valve under different inlet pressure values ​​based on CFD simulation data of the plug valve; determining the dangerous opening threshold data of the plug valve based on the critical opening value data, and constructing a mathematical fitting model based on the two; determining the current inlet pressure of the plug valve, and determining the current dangerous opening threshold of the plug valve based on it and the mathematical fitting model; determining the current opening value of the plug valve, and determining the opening difference value between it and the current dangerous opening threshold; setting the opening and closing adjustment coefficient of the plug valve based on the opening difference value, and adaptively adjusting and controlling the opening and closing working conditions of the plug valve based on it. This invention dynamically quantifies the dangerous threshold by constructing a mathematical fitting model, and intelligently switches the opening and closing control mode of the plug valve by analyzing the opening difference, significantly improving the reliability, sealing life and safety of the valve under extreme pressure.

This utility model provides a steel wire surface cleaning device, comprising: a cleaning base, a cleaning head, an air pipe connector, an annular orifice, and a nozzle. The cleaning base contains a fixed cavity, an air inlet cavity, a guide cavity, and an air outlet cavity connected end-to-end. The inner diameter of the fixed cavity is smaller than that of the air inlet cavity. The guide cavity and the air outlet cavity are both conical and their apexes are connected. The cleaning head is inserted into the cleaning base and includes a knob, a stopcock, a guide cylinder, and a guide cone connected end-to-end. The knob protrudes from the cleaning base. Outside the seat, the plug is screwed into the fixed cavity, the guide cylinder is inserted through the air inlet cavity, the conical outer wall of the guide cone is tightly attached to the conical inner wall of the guide cavity, and a cleaning space is left between the cone tops of the two. Multiple spiral grooves extending from the cone bottom to the cone top are evenly opened on the conical outer wall of the guide cone. A through wire hole is opened in the purge head, and the wire nozzle is fixedly embedded in the cone top of the guide cone through the annular hole stop. The air pipe connector is inserted and fixed on the outer wall of the purge seat and communicates with the air inlet cavity.

The application discloses a press cone push type cock valve, which comprises a valve body, an air inlet channel, at least one air outlet channel, a valve core accommodating cavity, an electromagnetic valve accommodating cavity, an electromagnetic valve, a valve core and a knob rod. The air inlet channel is arranged in the valve body; the at least one air outlet channel is arranged in the valve body; the valve core accommodating cavity is arranged in the valve body; the electromagnetic valve accommodating cavity is arranged between the air inlet channel and the valve core accommodating cavity and is communicated with the air inlet channel and the valve core accommodating cavity; the electromagnetic valve is arranged in the electromagnetic valve accommodating cavity and is used for controlling the on-off of the air inlet channel and the valve core accommodating cavity; the valve core is rotatably arranged in the valve core accommodating cavity; the valve core is provided with at least one air passage and is used for selectively connecting the valve core accommodating cavity with the at least one air outlet channel; the knob rod is connected with the valve core and is axially movably arranged in the valve core accommodating cavity; the bottom end of the knob rod is provided with a slope structure; the end, close to the valve core accommodating cavity, of the electromagnetic valve is provided with a push rod; the slope of the slope structure is in abutment with the end of the push rod; when the knob rod is axially pressed, the slope of the slope structure pushes the push rod downwards, so that the push rod moves away from the valve core accommodating cavity.

This utility model relates to a stopcock assembly for a pipeline, comprising: a first tubular body and a second tubular body (1 and 4), each tubular body having an internal shut-off valve, an engagement device (2) at one end and a first seat (3) at the other end; and an accessory (6) disposed between the two tubular bodies (1 and 4), the accessory (6) having a second seat (5) at each end, wherein the first seat (3) and the second seat (5) are complementary, and the seat (3 and 5) are engaged in a direction transverse to the tubular bodies (1 and 4) by a removable connection.

This invention discloses a quantitative sample injection device and method for capillary electrophoresis, applied in the field of capillary electrophoresis technology. The key technical points are: it includes a sample vial and a buffer chamber, with a capillary tube fixedly connected between the sample vial and the buffer chamber; a three-way valve is also fixedly provided, with the capillary tube and the buffer chamber respectively fixedly connected to the three-way valve; a quantitative sample injection component for generating negative pressure to achieve sample injection is externally fixedly connected to the three-way valve; a shut-off valve is fixedly connected between the three-way valve and the buffer chamber; and a miniature stopcock valve is fixedly provided between the quantitative sample injection component and the three-way valve. The technical effect is: improving the accuracy of sample injection volume while reducing the cost of the injection device.

The utility model provides a kind of high sealing stopcock, including valve body, valve core and valve cover, the two sides of the valve body are equipped with inlet and outlet respectively, the valve core is arranged in the inside center of valve body, the valve cover is arranged in the top of valve body, and is fixedly connected with valve body by bolt, the top of the valve cover is equipped with top cover, the top cover is fixedly connected with valve cover by bolt, the front and back of the valve body are symmetrically equipped with indicating mark, for indicating the flow direction of material, the upper end of the valve core is equipped with connecting handle, the connecting handle is integrated with valve core, the connecting handle penetrates valve cover and top cover, the top of the connecting handle is equipped with handle, the handle is engaged in the end of connecting handle, the inlet is equipped with filter device, the filter device is used to filter the material at inlet, by using multiple sealing structures on valve body, the cooperation of sealing ring and sealing gasket, and the thread connection mode of snap ring and fastening groove, material leakage can be effectively prevented, and the sealing property of stopcock is improved.