404 results about "Medium pressure" patented technology

The invention discloses a temperature and pressure sensor for a new energy automobile, and belongs to the technical field of sensor equipment, the temperature and pressure sensor comprises a plug assembly, a shell and a protective sleeve, a support seat, a circuit board, a temperature sensing probe and a pressure sensing element are arranged in the shell, the protective sleeve is arranged at the lower waist part of the support seat, and the temperature sensing probe is located in the protective sleeve and is in electric signal connection with the circuit board; a square groove for containing the pressure sensing element and the circuit board is formed in the top of the support base, the pressure sensing element is arranged at the bottom of the circuit board and is in electric signal connection with the circuit board, and a pressure transmission channel is further arranged in the shell. The pressure transmission channel comprises a gap part defined by a protective sleeve and a shell and a special-shaped channel formed in the support base, a circular pressure groove is formed in the square groove, the circular pressure groove is matched with the pressure sensing element to form a pressure cavity which is eccentrically designed relative to the shell in the axial direction, and the special-shaped channel is formed in a medium leading-in area. Therefore, the medium entering surface area can be increased through the eccentric design, and the response speed of medium pressure measurement is ensured.

The invention discloses an automatic medium-pressure online detection and closed-loop control method for die steel, relates to the technical field of medium-pressure online detection, and is used for solving the problems that the probability of production deviation is increased and the precision of medium-pressure interval range adjustment is reduced due to abnormality discovery lag. Collecting a pressure fluctuation value and an off-center peak value to comprehensively judge whether the conditions are abnormal; when an abnormal instruction is generated, entering a pressure test stage, calculating a pressure scaling interval based on vibration deviation and fan frequency, adjusting a default pressure interval to obtain a new pressure control interval, and comparing the new pressure control interval with a pressure value; and when the temperature exceeds the range, the surface temperature uniformity of the steel billet is detected, a fault-tolerant proportional adjustment pressure scaling interval is calculated, a control interval is updated and subjected to secondary comparison, whether an abnormal instruction is eliminated or not is determined, production abnormity is found in time, the abnormity judgment accuracy is improved, the abnormity is found in time, and the dynamic adjustment precision of the pressure control interval is improved.

The invention relates to the technical field of coal mine underground drilling equipment, in particular to a gyrator for a coal mine directional drilling machine and a using method.The gyrator comprises a shell, an input shaft and an output shaft, the shaft extension end of the output shaft is provided with a pressure balance type multiple dynamic sealing system, and the sealing system comprises a main sealing unit, a pressure balance unit and a dustproof sealing unit; the pressure balance unit comprises a sealing cavity, a lubricating grease injection channel and a grease injection nozzle; pressure lubricating grease is injected into the sealing cavity through the grease injection nozzle, so that a dynamic positive pressure barrier higher than the internal medium pressure of the gyrator and the external pressure of the environment is formed in the sealing cavity; through a triple sealing structure formed by combining the spring seal main seal, the pressurization balance cavity and the V-shaped dustproof ring and by combining an active injection and dynamic balance using method, passive blocking of traditional sealing is converted into active defense, the problem of invasion of high-pressure slurry and pulverized coal is effectively solved, and the service life of the sealing device is prolonged. And the working reliability and the service life of the equipment are obviously improved.

The utility model discloses a high-temperature-resistant flash valve exhaust nozzle structure which comprises a pipe body and an energy reduction structure. The energy reduction structure comprises at least two stages of ceramic energy reduction units which are connected in series, and the ceramic energy reduction units are connected in the pipe body; the ceramic energy reduction unit comprises a first-stage energy reduction assembly and a second-stage energy reduction assembly; the first-stage energy reduction assembly comprises a first ceramic spray pipe and a first liner pipe; the first lining pipe sleeves the outer side of the first ceramic spray pipe; the first liner tube is arranged in the tube body; the second-stage energy reduction assembly comprises a second ceramic spray pipe and a second liner pipe; the second lining pipe sleeves the outer side of the second ceramic spray pipe; the second liner tube is arranged in the tube body; the end of the first ceramic spray pipe abuts against the end of the second ceramic spray pipe. And a medium flows out of the pipe body after sequentially passing through the first-stage energy reduction assembly and the second-stage energy reduction assembly from the inlet end of the pipe body. According to the multi-stage energy reduction device, the multi-stage energy reduction assemblies connected in series are adopted, medium pressure can be decomposed into stage-by-stage release, and therefore the fluid speed is effectively reduced, and dependence on a high-temperature adhesive is also avoided.

The invention relates to a variable load leakage and deformation controllable mechanical sealing device, and belongs to the technical field of mechanical sealing.The variable load leakage and deformation controllable mechanical sealing device comprises a shaft sleeve, a shell, a first mechanical sealing mechanism and a second mechanical sealing mechanism, and the shell is provided with a lubricating liquid inlet and a lubricating liquid outlet; the first mechanical sealing mechanism is arranged between the shaft sleeve and the shell, the second mechanical sealing mechanism is arranged between the shaft sleeve and the shell, a liquid cavity is defined by the first mechanical sealing mechanism, the shaft sleeve, the shell and the second mechanical sealing mechanism, and the lubricating liquid inlet and the lubricating liquid outlet are both communicated with the liquid cavity. The pressure of lubricating liquid entering from the lubricating liquid inlet is dynamically changed, the pressure of the lubricating liquid is always larger than the pressure of a medium in the circulating pump, and the pressure difference is within a preset range. The mechanical seal has the advantages that the use effect of the mechanical seal is effectively guaranteed under the condition that the medium pressure in the circulating pump changes, and the mechanical seal can be suitable for the high-pressure variable-load working condition.

The invention discloses a regulating valve capable of quickly realizing large and small flow switching and a control method thereof, relates to the technical field of regulating valves, and is obviously different from a conventional regulating valve in improvement of a valve rod structure. The initial purpose is to meet the requirement for medium flow fluctuation in an upstream channel through the moving capacity of the movable valve rod, the control method comprises three stages of self-weight balance, information interaction and opposite regulation and control, opening balance is completed through a balancing weight, then the medium flow and valve element opening information are combined, and the valve element opening degree is adjusted and controlled. Two times of opening degree switching are achieved through the fixed valve rod and the electromagnetic action assembly in sequence, the fluid flow fluctuation scene can be adapted, the pressure fluctuation influence during opening degree switching is reduced, firstly, self-adaption can be conducted according to the medium flow change in an upstream channel, and secondly, active interference can be conducted through the electromagnetic action assembly; the passing requirement of a medium in a downstream channel is ensured, and the negative influence caused by medium pressure is reduced.

The invention provides a valve device. The valve device comprises a main valve component, a bypass valve component and a communicating pipe. When the medium pressure difference of the inflow runner part and the outflow runner part of the main valve part reaches the preset value, the first valve port part of the bypass valve part can be opened for pressure relief, the bypass valve part and the main valve part are integrated, and the problem that the pressure relief function is lost due to reverse installation of the bypass valve part does not exist. The bypass valve component is provided with the pressure gauge connector part, the bypass valve component has a bypass function and a cut-off function, a channel between the pressure gauge connector part and the main valve component can be cut off, and the safety problem when the pressure gauge is connected is solved.

The invention provides a supercritical carbon dioxide power generation working medium pressure adjusting system, belongs to the technical field of power generation system working medium pressure adjusting, and can at least partially solve the problems that in the existing unit start-stop and load adjusting process, the system pressure is greatly changed, normal operation of a unit is affected, and the working efficiency is low. The system comprises a power generation module, and the power generation module comprises a compressor and a heat regenerator connected with the compressor through a pipeline; the carbon dioxide working medium circulating system is provided with the gas storage tank, part of the carbon dioxide working medium is stored in the gas storage tank through the differential pressure of the high-pressure part and the low-pressure part of the circulating system, the working quality of the circulating system is adjusted, and the carbon dioxide working medium circulating system has the advantages of being simple and convenient to operate.

The invention provides an integrated ball valve which comprises a valve body and an actuator, a ball body is arranged in the valve body, the actuator is in driving connection with the ball body through a valve rod, the integrated ball valve is characterized by further comprising an electromagnetic valve, a first piston cylinder and a second piston cylinder, a first piston is arranged in the first piston cylinder, and a second piston is arranged in the second piston cylinder. A first piston is arranged in the first piston cylinder, a second piston is arranged in the second piston cylinder, the first piston and the second piston are in meshed connection with the valve rod, and the electromagnetic valve is used for introducing medium pressure on the high-pressure side of the valve body into the first piston cylinder and / or the second piston cylinder so that the first piston cylinder and / or the second piston cylinder can act. The piston cylinder is arranged on the valve body, medium pressure is introduced, driving force is formed at the two ends of the piston through medium pressure difference, the driving force and the actuator are combined to drive the valve rod to achieve rapid opening and closing of the valve, and the problems that an actuator of an existing high-pressure working condition integrated ball valve is large in size and weight and long in opening and closing time are solved.

An annular groove is formed in a valve body, a piston ring and a valve seat ring are arranged in the annular groove, a movable valve seat is arranged at the front end of the valve seat ring, the movable valve seat is matched with a butterfly plate in a conical surface hard sealing mode, and a drainage hole is formed in the bottom of the annular groove. A reverse medium enters the annular groove through the drainage hole to push the piston ring, the piston ring pushes the valve seat ring, and the valve seat ring pushes the movable valve seat, so that the movable valve seat is wedged on the sealing surface of the butterfly plate; when a medium flows in the forward direction, the downstream is a low-pressure area, the piston ring is pushed to the bottom of the annular groove, the valve seat ring and the movable valve seat are pushed by the medium to be tightly attached to the sealing face of the butterfly plate, the larger the medium pressure is, the larger the sealing force is, and the medium pressure self-sealing effect is achieved; the movable valve seat is pushed by a medium to be tightly attached to the sealing face of the butterfly plate for compensation, and therefore the whole sealing pair can keep the sealing performance of a new valve after being opened and closed at high frequency.

The invention belongs to the technical field of nuclear power, and particularly relates to a pressure self-driving type separation pressure relief device. The device is driven to be opened through unbalanced force caused by medium pressure to the valve rod assembly. The separation structure is arranged, and the bearing bush and the separator can complete the separation action when the required separation pulling force is applied; the protector is of an integrated structure, one end of the protector is designed to be a blind hole, the head of the protector is designed to be a weak area, zero leakage is kept in a closed state under the normal working condition, when medium pressure reaches starting pressure, the disengaging structure is disengaged, the valve rod breaks the protector in a pulling mode, and the opening action is completed. The whole action process does not depend on external energy, signals, manpower and other operations, has the characteristic of high reliability, and can be applied to numerous key parts needing to execute the pressure relief function.

The utility model provides a fluid medium pressure gauge adopting an embedded damping device, which comprises a damping plate, bottom plates are arranged on two sides in a sliding chute, a supporting seat is movably arranged at the top of each bottom plate, an outer protection plate is mounted at the top of each supporting seat, and a pressure gauge body is mounted on each outer protection plate. An inner buffer rubber block is arranged between the bottom of the pressure gauge body and the outer protection plate; according to the utility model, the top of the damping plate is provided with the supporting seat sliding on the bottom plate, the top of the supporting seat is provided with the outer protection plate, the pressure gauge body is supported by the outer protection plate, and one side of the supporting seat is provided with the damper, so that the pressure gauge body can be damped through cooperation of the supporting seat and the damper when being subjected to transverse vibration; and meanwhile, the inner buffer rubber block is arranged between the pressure gauge body and the outer protection plate, so that the transmitted vibration can be reduced through the inner buffer rubber block when the pressure gauge body is subjected to vertical vibration, and the impact on the pressure gauge body is reduced.

The utility model relates to a pilot-operated type pressure balance pneumatic valve which comprises a valve body, a valve cover and a valve rod, and a valve seat is installed at the position of a valve shoulder of the valve body. The valve body is connected with the valve cover through a bolt; a through hole is formed in the center of the valve deck, the valve rod moves up and down along the through hole in the valve deck, and a sleeve is arranged on the upper portion of the valve seat and fixed in the valve body through the valve deck. A valve clack is arranged in the sleeve and moves up and down in the sleeve; a pilot valve core is arranged in the valve clack; a pressure balance disc is arranged on the top of the pilot valve element. The thrust requirements of the valve in the opening, closing, opening process, closing process and semi-opening state are greatly reduced, the opening process and the closing process only need to overcome friction of all parts and can be achieved without overcoming medium pressure, and meanwhile the medium auxiliary sealing effect in the full-closing state of the valve is reserved; while the good sealing performance is met, the opening and closing thrust of the valve is reduced, the operability of the valve is improved, and the requirement for an actuator is reduced.

The invention relates to the technical field of ball valves, in particular to an all-welded ball valve which comprises a welded valve body, a movable valve element, a ball body and a floating valve seat. Stepped holes are formed in the left side and the right side of an inner cavity of the welding valve body correspondingly, columnar structures in sliding fit with the stepped holes in the corresponding sides are arranged at the two ends of the movable valve element correspondingly, and the two ends of the movable valve element are in sealing fit with the stepped holes in the corresponding sides through corrugated pipes I correspondingly. A springback device for driving the movable valve core to move towards the medium inlet side of the welding valve body is arranged between the movable valve core and the welding valve body; a cut-off device is arranged on the medium inlet side of the welding valve body. By arranging the pressure balance mechanism composed of the movable valve element, the rebounding device and the cut-off device, when the ball body is in the closed state, the medium pressure is mainly borne by the cut-off device, the ball body only bears the elastic force provided by the rebounding device, the sealing reliability of the valve under the high-pressure frequent opening and closing working condition is remarkably improved, and the service life of the valve under the high-pressure frequent opening and closing working condition is remarkably prolonged.

The utility model discloses a device is unloaded to tank car with ice machine liquid ammonia simply, including compressor, ice machine system, liquid ammonia unloading pipeline, liquid ammonia pipeline, medium pressure nitrogen pipeline and tank car, ice machine system includes anti surge cooler, liquid ammonia storage jar and power saver, compressor links to each other with anti surge cooler, and anti surge cooler links to each other with liquid ammonia storage jar, and liquid ammonia storage jar links to each other with power saver, and power saver links to each other with the ammonia cooler of low temperature methanol washing system, and the ammonia cooler of low temperature methanol washing system links to each other with compressor, be connected with liquid ammonia pipeline on liquid ammonia storage jar, and liquid ammonia pipeline links to each other with tank car, be connected with liquid ammonia unloading pipeline on power saver, and liquid ammonia unloading pipeline links to each other with liquid ammonia pipeline, and medium pressure nitrogen pipeline links to each other with liquid ammonia pipeline and tank car. Advantage is: guarantee ice machine system supplement liquid ammonia and can utilize same pipeline safely and effectively when storing liquid ammonia in system and unloading, avoid the emergence of overpressure or leakage due to preparation use temporary pipeline and cause safety accident.

The pipeline pressure blocking operation multi-degree-of-freedom hydraulic manipulator device and method of the present application belongs to the pipeline repair and pressure blocking technical field, comprising: setting pressure blocking execution device, wherein the pressure blocking execution device comprises a main feeding rod and a blocking head at the end of the main feeding rod, and an embedded fine adjustment mechanism is connected between the blocking head and the main feeding rod, and the scheme adopts the parallel connection configuration of high-strength flexible hinge and micro hydraulic cylinder; the high-strength flexible hinge has very high rigidity in the axial direction, can withstand the huge axial thrust generated by the medium pressure up to 25 MPa or above, and ensures that the blocking head is not pushed back; at the same time, by using the incompressibility of hydraulic oil, the system can still realize the fine adjustment of ± 3 degrees to ± 5 degrees of pitch and yaw while maintaining high pressure bearing capacity through the coordinated action of the hydraulic cylinder, solving the pain points of easy self-locking and difficult adjustment under high pressure.

The application provides a multi-working-condition adaptive valve group, an expansion turbine and a reaction speed type expander. The multi-working-condition adaptive valve group has a distribution cavity with an air inlet and used for collecting and receiving a working medium; a plurality of valve body units are connected with the distribution cavity, each valve body unit has a different preset opening and closing pressure interval, and the opening and closing pressure interval of any valve body unit intersects with or has the same end point value as the opening and closing pressure interval of at least one other valve body unit, so that any valve body unit is closed, and at least one other valve body unit is necessarily opened. The application also provides an expansion turbine with the valve group, a reaction speed type expander applied with the expansion turbine, and the application of the expander. The valve group in the application can adaptively distribute according to the working medium pressure at the air inlet. When the valve group is installed in an expander, a compressor and other equipment or systems, the problems of under-expansion, over-expansion and other working condition matching in the prior art can be solved.

The invention discloses a vacuum composite insulation prefabricated pipe test system and method. The system comprises a steam generation module, a test pipeline module, a condensation recovery module and a sensing monitoring module. The method comprises the following steps: a steam generation module provides low-pressure, medium-pressure and high-pressure temperature-adjustable steam through a graded heating unit, the steam is introduced into a test pipeline, pressure and temperature sensors are arranged at an inlet, the middle and an outlet of the test pipeline, and multi-dimensional parameter acquisition of pressure and temperature under different working conditions is realized; in the test process, the condensation recovery module recovers condensate water and a vapor-liquid mixture to the steam generator water tank, and energy recycling is achieved. The sensing monitoring module monitors the pressure and temperature of a vacuum layer and the state of a working pipe in real time. According to the method, key parameters such as the vacuum leak rate, the thermal resistance and the thermal loss are synchronously measured through the steps of preheating, stepped temperature rise, steady state testing and the like, the actual working condition can be accurately simulated, multi-parameter synchronous measurement is achieved, the testing efficiency and accuracy are improved, energy recycling is achieved, and a safe and stable operation guarantee mechanism is achieved.

The application relates to the technical field of valve driving, and discloses a high-speed driving device and a method thereof, which comprises a cylinder body, a piston is slidably connected to the inner wall of the cylinder body, an energy storage cavity and an annular cavity are arranged at the upper part of the inner wall of the cylinder body, a buffer cavity is arranged at the lower part of the inner wall of the cylinder body, the annular cavity is communicated with the buffer cavity, the energy storage cavity, the annular cavity and the buffer cavity are all connected with an external pressure source, the energy storage cavity is connected with a first controller and a first valve, the first controller is used for controlling the opening and closing of the first valve, the annular cavity and the buffer cavity are connected with a second controller and a second valve, and the second controller is used for controlling the opening and closing of the second valve. The pressure medium of the energy storage cavity is fed in advance, when the pressure medium in the buffer cavity flows into the annular cavity, the piston can respond instantaneously, and the pressure medium does not need to be injected, under the action of the medium pressure of the energy storage cavity and the medium pressure of the annular cavity, the piston is driven downward instantaneously, and millisecond-level response of the piston is realized.

The invention relates to the field of centrifugal pumps, in particular to an efficient throttling and sealing self-balancing centrifugal pump. Comprising a pump body, a self-balancing rotor assembly, a two-way throttling sealing structure, an inner sealing ring, an outer sealing ring, an outer sealing ring, an inner sealing ring, an outer sealing ring, an inner sealing ring, a sealing ring, an inner sealing ring, a sealing ring and an outer sealing ring, wherein the pump body is provided with a forward cavity and a reverse cavity which are respectively communicated with a liquid inlet and a liquid outlet; and one end of the double-side transition pipe is communicated with the forward cavity and the other end of the double-side transition pipe is communicated with the reverse cavity. The inner sealing ring is embedded in the inner side between the butt joint flange and the mounting flange, the outer sealing ring is arranged on the periphery between the butt joint flange and the mounting flange in a sleeving mode, the two annular gaskets are located on the upper end face and the lower end face of the inner sealing ring respectively, and the positioning bushes are arranged on the outer sides of the annular gaskets. Through the semi-embedded and semi-convex structure of the annular gasket, radial and axial deformation is synchronously generated under the medium pressure, self-reinforced sealing is formed, pre-tightening force is not needed, the sealing specific pressure is automatically increased along with the pressure, complex working conditions are adapted, and efficient sealing is achieved.

The utility model belongs to the technical field of one-way valves, and relates to a fuel oil one-way valve with reverse zero leakage and physical misloading prevention. Comprising a jacket nut, an inlet shell, an O-shaped ring, a shaft, a spring, a valve plate, a gasket a, a support, a gasket b and an outlet shell. According to the one-way valve, vulcanized rubber is arranged on the valve plate, the protruding face of the vulcanized rubber is designed to be in an arc shape, under the action of spring pressure and working medium pressure, the vulcanized rubber is matched with the ground valve seat sealing face on the inlet shell, and reverse zero leakage is achieved under small working pressure; and the inlet shell connecting pipe nozzle and the outlet shell connecting pipe nozzle are designed to be opposite connecting ports, so that the product is physically prevented from being mistakenly assembled.

The invention discloses a direct-connection medium-pressure large-flow efficient centrifugal fan, and relates to the technical field of energy-saving refrigeration. Comprising a worm-shaped machine shell, a driving motor, an impeller, an air inlet cylinder, a dehumidification adjusting device, a stator grid and an annular space liquid discharging structure, the dehumidification adjusting device is arranged at a horn mouth, and a humidity sensor and a control system are combined, so that automatic adjustment of the angle of a guide vane is achieved. When the humidity is relatively high, the flow guide angle is increased to strengthen the air rotation component and enhance the centrifugal separation effect of liquid drops; and when the humidity is low, the flow guide angle is reduced to reduce tangential deflection and turbulence loss of airflow, so that the pressure loss of the system is reduced. Through the self-adaptive control, the air inlet state can be kept optimal under different humidity working conditions, and the dehumidification performance and the aerodynamic efficiency are both considered. Air is deflected by the guide vanes to form spiral rotational flow, and the radial velocity gradient generated by the rotational flow promotes liquid drops in the air to quickly migrate to the outer wall under the action of centrifugal force, so that the wet air is layered.

The present application relates to the technical field of ball valve, more particularly, to a full-welded ball valve, which comprises a welded valve body, a movable valve core, a ball and a floating valve seat; the left and right sides of the inner cavity of the welded valve body are both provided with stepped holes, the two ends of the movable valve core are respectively provided with columnar structures which are in sliding fit with the stepped holes on the corresponding side, the two ends of the movable valve core are respectively in sealing fit with the stepped holes on the corresponding side through corrugated pipes I, and a rebound device is arranged between the movable valve core and the welded valve body to drive the movable valve core to move to the medium inlet side of the welded valve body; the medium inlet side of the welded valve body is provided with a cut-off device. The pressure balance mechanism composed of the movable valve core, the rebound device and the cut-off device is arranged, in the closed state of the ball, the medium pressure is mainly borne by the cut-off device, and the ball only bears the elastic force provided by the rebound device, so that the sealing reliability and service life of the valve under the high-pressure frequent opening and closing working condition are significantly improved.

The application relates to an elliptical wheel machine, which comprises a machine body, the machine body being a driving machine when medium pressure is reduced, and the machine body being a driven machine when medium pressure is increased. When the machine body is the driving machine, the machine body comprises a front cylinder body and a rear cylinder body communicated with the front cylinder body, the included angle between the center line of the front cylinder body and the center line of the rear cylinder body being 90 DEG; when the machine body is the driven machine, the machine body comprises a front cylinder body and a rear cylinder body communicated with the front cylinder body. The application has the advantages that the inner cavity of the stator is divided into four chambers, the difference between the long axis and the short axis of the ellipse is ingeniously utilized, thrust is generated under the action of pressure difference, and then the thrust is converted into torque, the function of the engine is realized, and the function of the driven machine is realized under the action of input torque.

The invention relates to the technical field of rubber detection, in particular to a testing device and method for a rubber expansion joint. A testing device for a rubber expansion joint comprises a pressure-bearing test chamber 10, a temperature and humidity control system 20, a corrosion medium circulation system 40 and a pressure circulation control system 30, the corrosive medium temperature and humidity control system 20 is connected with the corrosive medium pressure-bearing test cabin 10 through a pipeline and is used for controlling the temperature of a medium in the corrosive medium pressure-bearing test cabin 10; the corrosive medium circulating system 40 is connected with the corrosive medium pressure-bearing test cabin 10 through a pipeline and is used for pumping and circulating a corrosive medium into the corrosive medium pressure-bearing test cabin 10; and the corrosive medium pressure circulation control system 30 is connected with the corrosive medium pressure-bearing test cabin 10 through a pipeline and is used for applying circulation pressure to the medium in the corrosive medium pressure-bearing test cabin 10. The three systems are connected into the test bin, synchronous coupling loading of three key factors of temperature, corrosion media and pressure is successfully achieved, and the accuracy of test data in the aspect of real life prediction is improved.

The utility model relates to pipeline installation technical field, concretely is a pipeline laying fixed structure, it includes bottom plate, adjusting mechanism, pipeline installation mechanism, fixed establishment and installation box, adjusting mechanism sets up at the top of bottom plate, pipeline installation mechanism sets up at the top of adjusting mechanism, fixed establishment sets up at the side of adjusting mechanism, the inside slide of installation box is provided with moving plate, the utility model discloses the setting of fixed establishment, motor drives drill bit to drill into the ground, miniature cylinder drives the land of the side of reinforcing plate to tie into, thereby realizes the multiple fixed of device, like this can avoid pipeline in operation to receive thermal expansion and cold shrink, medium pressure, ground subsidence etc. external force effect, thereby leads to local stress concentration, causes pipeline deformation, interface loosening even rupture, and through multipoint fixed, will stress dispersion to multiple support points, avoids single point overload, thereby protects pipeline structure integrity.

The utility model discloses a low-resistance two-way sealing butterfly valve which comprises a valve body and a valve clack, a strip-shaped groove (8) concaved downwards is formed in the center of the back of the valve clack, the strip-shaped groove is distributed along the central axis of the back of the valve clack to roughly divide the back of the valve clack into two parts, fusiform shaft hole bearing hubs (9) are symmetrically arranged on the two sides of the back of a valve plate, and the fusiform shaft hole bearing hubs (9) are arranged in the valve body. Two rib plates (10) are symmetrically arranged on the front face of the valve plate relative to the central axis. The utility model has the beneficial effects that the vortex core of a valve medium can be effectively controlled, so that the vortex core uniformly forms two large vortexes, the generation of disordered small vortexes is inhibited and eliminated, the flow state is stabilized, and the flow resistance is reduced; when the valve is closed, the evenly-distributed protruding wave-shaped round corners make contact with part of the sealing face of the valve body, under the action of medium pressure, the small protruding round corners deform, the contact width of the small protruding round corners and the sealing face is increased, and the sealing specific pressure is increased.

The present application relates to the technical field of self-closing valve, in particular to a large-diameter butterfly valve with self-closing function, which comprises a mounting pipe, a sealing plate and a butterfly plate used in conjunction are arranged in the mounting pipe, the sealing plate and the butterfly plate are respectively composed of a first half sealing plate and a first half butterfly plate and a second half sealing plate and a second half butterfly plate arranged on the same side, a reset assembly is arranged on one side of the first half sealing plate, a limiting plate is arranged on the second half butterfly plate in the direction on the same side of the reset assembly on the first half sealing plate, wherein the reset assembly comprises a fixed pipe with an arc structure, a reset rod adapted to the structure of the fixed pipe is slidably arranged in the fixed pipe, a reset spring is arranged at one end of the reset rod in the fixed pipe, the "over-center flip" phenomenon caused by the medium pressure of the pipeline is effectively avoided by arranging the butterfly plate with a avoiding opening and the reset assembly, the reset rod is pushed by the reset spring, the butterfly plate returns to the initial position, and the automatic closing process is completed.

The utility model discloses a combustible liquid vehicle filling anti -drop device belongs to combustible liquid filling technical field, this combustible liquid vehicle filling anti -drop device, including the bearing mechanism and the compression mechanism, the bearing mechanism is clamped fixed with the connector mechanism for the liquid filling of the butt joint pipeline, the connector mechanism is integrally fixed with the locking mechanism for locking the compression mechanism. The utility model discloses the setting of bearing mechanism, connector mechanism, locking mechanism, compression mechanism and sliding mechanism, locking mechanism can lock the compression mechanism, effectively prevent the compression mechanism and rotate loose because of the mistake touch or because of medium pressure etc.

The invention relates to the technical field of valves, and particularly discloses a sealing ring capable of automatically adjusting sealing pressing force according to system pressure, the sealing ring is applied to a valve assembly, and the valve assembly comprises a valve body, a valve element arranged in the valve body and a water pipe penetrating through the valve body; the sealing ring is of an integrally-formed structure and comprises a sealing ring body, the sealing ring body is provided with a valve body sealing face making contact with the inner wall of the valve body and a water pipe sealing face making contact with the outer wall of the water pipe, and the sealing ring body is used for achieving sealing between the interior of the valve body and the external environment; the inner side sealing structure and the outer side sealing structure are arranged on the inner side ring portion of the sealing ring body from inside to outside in the radial direction and jointly form a valve element sealing face making contact with the outer wall of the valve element. According to the invention, by designing a geometrical configuration with an inner and outer double-lip sealing structure and a corresponding pressure-bearing surface, the sealing pressing force of the sealing ring does not only depend on the initial pre-tightening force of a material, but can be adaptively adjusted by using the pressure of a working medium of a system.