128results about How to "Wide range of pressure regulation" patented technology

An overflow valve with a magneto-rheological pilot valve comprises an overflow valve seat, an overflow valve upper cover plate, a main valve spool, an overflow valve body, a main valve spool spring, a magneto-rheological pilot cone valve, a magneto-rheological pilot valve front cover plate, a magneto-rheological pilot valve body, a magneto-rheological pilot valve piston, an electromagnetic coil, a one-way valve plate, a transition plate, a pressure regulating spring, a pressure regulating block and a pressure regulating screw. The overflow valve upper cover plate, the magneto-rheological pilot valve front cover plate and the magneto-rheological pilot valve body are mounted on the overflow valve seat, a valve rod of the magneto-rheological pilot cone valve penetrates the overflow valve upper cover plate, enters the magneto-rheological pilot valve body and is closely connected with the magneto-rheological pilot valve piston, the magneto-rheological pilot valve piston, the magneto-rheological pilot valve body and the electromagnetic coil form a working gap, so that magneto-rheological fluid flows, a space is formed between the transition plate and the valve rod of the magneto-rheological pilot cone valve, the one-way valve plate can elastically deform in the space, and the pressure regulating screw is rotated and can push the pressure regulating block at the front end of the pressure regulating screw to compress or release the pressure regulating spring.

The present invention relates to a pilot type hydraulic overflow valve. Its main valve body has front end cover, in said main valve body a main valve seat, a main valve buckle, a main valve core and a main valve spring are set, and said pilot valve is formed from its valve seat, valve core and pressure-regulating spring, said pilot valve is connected with said main valve. Said invention also provides the structure of main valve and pilot valve, and provides the application range of said valve.

The invention provides a pressure regulating valve, which comprises a valve body, a flow guide sieve sleeve, a double-piston assembly and a regulating mechanism, wherein a circulation part of the flow guide sieve sleeve is provided with a plurality of through holes extending in the axial direction of the flow guide sieve sleeve, the double-piston assembly comprises a pressure regulating piston and a balance piston and can move in the axial direction along the inner wall surface of the flow guide sieve sleeve, a pressure balance cavity is formed between the pressure regulating piston and the balance piston, and the regulating mechanism is used for controlling the flow rate and the pressure of fluid in the pressure balance cavity so that the double-piston assembly realizes the synergistic effect in the axial direction of the valve body for controlling the engaging position of the pressure regulating piston and the inner wall surface of the flow guide sieve sleeve. The pressure regulating valve provided by the invention can realize the self adaption to the pressure regulation of the pressure regulating valve, in addition, the safety is ensured, and meanwhile, the pressure at the outlet side of the pressure regulating valve is reliably stabilized in a proper range.

The invention discloses a voltage-regulating variable-frequency hierarchical control ultrasonic plastic welding power supply, which comprises a sampling control unit, a rectifying and DC voltage-regulating unit, a fixed phase-shift angle inversion unit, a matching boosting isolating unit and an ultrasonic transducer. The sampling control unit comprises a microprocessor, a first signal conditioning circuit, a second signal conditioning circuit, a driving circuit, an effective value detection circuit and a phase detection circuit, wherein the first signal conditioning circuit and the driving circuit are connected with the microprocessor; the second signal conditioning circuit is respectively connected with the effective value detection circuit and the phase detection circuit; and the effective value detection circuit and the phase detection circuit are both connected with an AD sampling port of the microprocessor. The voltage-regulating variable-frequency hierarchical control ultrasonic plastic welding power supply has the advantages that output voltage and current waveform THD is small, the voltage-regulating range is wide, large-power ultrasonic welding can be realized, the voltage-regulating or power-regulating response is quick, the voltage ripple is small, the transducer has a small vibration amplitude fluctuation, the frequency tracking precision and the accuracy are high, the electric conversion efficiency is high and the like.

The invention relates to a novel reversing valve. The novel reversing valve is characterized in that the novel reversing valve comprises a base (1), a reversing cavity (2), a piston cavity (3) and a pressure regulating cavity (4) are sequentially installed on the base (1) from bottom to top, the reversing cavity (2) is provided with a first inlet, a second inlet and an outlet, a double-valve-element component (5) is installed in the reversing cavity (2), the lower end of the double-valve-element component (5) is connected with the base (1) through a reset spring (6), the upper end of the double-valve-element component (5) is connected with an air-controlled piston (8) installed in an air pressure cavity (7) in the piston cavity (3), a diaphragm tray component (9) is installed in the pressure regulating cavity (4), and an exhaust hole (20) is formed in the middle of the diaphragm tray component (9). The pilot-operated type operating principle is adopted in the novel reversing valve, and the novel reversing valve can detect air source pressure and achieve automatic reversing and can be applied to the field of pneumatic interlocking or safety control in the instrument and meter industry.

The invention discloses a movable valve seat type spring loaded type relief valve. The movable valve seat type spring loaded type relief valve comprises a valve body provided with a cavity body. A water inlet and a water outlet communicated with the cavity body are formed in the valve body. A valve core and a valve seat are arranged inside the cavity body of the valve body. A spring is arranged inside a cavity of the interior of a front end cover. A spring ejection rod is installed at the top of the spring, and a spring base is arranged at the bottom of the spring. One end of the spring abuts against the spring ejection rod, and the other end of the spring abuts against the spring base. The valve seat comprises a two-stage step structure. The ascending end of the step structure is in clearance fit with the valve body and a sleeve. According to the movable valve seat type spring loaded type relief valve, a valve core king-rod structure is designed in the position of an injection inlet where fluid enters the valve core through the valve seat, so that the fluid power of the sprayed fluid is conducted to the valve core through a valve core king-rod, and the impact force and the corrosion to the valve seat by the fluid power are reduced; in addition, the step structure part of the valve seat makes contact with the two-stage conical surfaces of the valve core, so that a two-stage throttling valve port structure is formed between the valve seat and the valve core, and the effective partial pressure can be achieved.

A novel on-load-tap-changing combined rectifier auto-transformer with independent ends comprises a regulating transformer and two rectifier transformers. Phases of the regulating transformer are the same in structure. The regulating transformer comprises a high-tension coil, a front-end auto-regulating winding, a tail-end auto-regulating winding, a front-end on-load tap changer and a tail-end on-load tap changer. The front-end auto-regulating winding and the rear-end auto-regulating winding are combined ad connected to the front end of the high-tension coil of the regulating transformer and are connected with the same in parallel. The front-end and rear-end auto-regulating windings supply variable voltage to high-tension coils of the rectifier transformers through tap changing so as to achieve rough voltage regulating. The tail-end auto-regulating winding and the tail-end on-load tap changer are combined and connected to the tail ends of the high-tension coils of the rectifier transformers so as to achieve fine voltage regulating. The rough tap changer and the fine tap changer are fully isolated, regulating range is wide, regulating is multilevel, output of low voltage is smooth, operating performance is stable, harmonic wave generated by rectification can be reduced, power factor and production efficiency of rectifier systems are increased, and manufacturing cost is lowered.

The invention relates to a large-caliber high-pressure pressure regulating valve for a pneumatic test device, and belongs to the technical field of valves. The large-caliber high-pressure pressure regulating valve for the pneumatic test device comprises a gas inlet (1), a gas outlet (2), a valve body (3), a valve plug (4), a valve seat (5), an upper cover (6), a lower cover (7), a balance air cylinder (8), a balance gas pipe (9), an oil cylinder supporting frame (10) and a driving oil cylinder (11), wherein the size of a gas flow channel between the valve plug (4) and the valve seat (5) is changed through vertical movement of the valve plug (4), and pressure regulation and pressure stabilization are achieved. According to the large-caliber high-pressure pressure regulating valve for the pneumatic test device, due to the facts that the balance air cylinder (8) is arranged in the valve body (3), and is connected with the gas inlet (1) through the balance gas pipe (9), and high-pressure gas before the valve serves as gas for balancing the large-caliber high-pressure pressure regulating valve for the pneumatic test device, driving force of the large-caliber high-pressure pressure regulating valve can be greatly reduced, regulation precision is improved, rapid pressure stabilization and rapid pressure adjustment are achieved, the range of pressure regulation is wide, and the full-opening time and the full-closing time are short.

A novel dual power on-load voltage regulation rectifier transformer comprises a voltage regulating transformer and a rectifier transformer, wherein the voltage regulating transformer comprises a voltage regulation transformer high voltage coil, a voltage regulation transformer voltage regulation coil and an on-load switch, and the rectifier transformer comprises a first rectifier high voltage coil, a second rectifier high voltage coil, a rectifier low voltage coil and a no-load switch, the first rectifier high voltage coil and the second rectifier high voltage coil achieve the combination of serial connection or parallel connection by means of the switching of the no-load switch, the voltage regulation transformer high voltage coil achieves the combination of positive and negative multi-pole voltage regulation by means of the selection of the positive and negative pole terminals and an output terminal of the on-load switch, different high voltage values are output to the rectifier transformer and transformed by the rectifier transformer, then different low voltage values are output, and the voltage regulation transformer and the rectifier transformer are conjugate iron cores. The voltage regulation rectifier transformer is wide in voltage regulation range, the low voltage output voltage is output in rank difference, the range of the low voltage output voltage is the same as that of voltage regulation, the voltage regulation rectifier transformer can work under different voltage levels of 20 kv and 10 kv, the usage ratio of equipment is high, the loss is low, the occupation space of the voltage regulation rectifier transformer is small, the production efficiency can be increased, and the production and operation costs can be reduced.

The invention relates to the field of voltage stabilized power supply, in particular to a high-power wide-range adjustable DC linear regulated power supply, which includes a switching power input circuit, an auxiliary switch power supply circuit, the power factor compensation boost circuit, the isolated power conversion circuit of the switching power supply, the voltage and current controllable BUCK circuit and the load voltage and current display circuit. By the cooperatively connected circuit modules, the invention solves the problems of narrow voltage regulation range, small power and bulkyof the existing DC linear voltage stabilized power supply.

The invention provides a voltage regulating transformer which comprises a main transformer body and a string transformer body. The main transformer body comprises a main transformer public coil, a main transformer series-connection coil and a main transformer voltage regulating coil, wherein the main transformer public coil and the main transformer series-connection coil are in series connection with a wire inlet end, and the main transformer voltage regulating coil is in electromagnetic coupling with the main transformer public coil and the main transformer series-connection coil. The string transformer body comprises a string transformer primary coil and a string transformer secondary coil, wherein the string transformer primary coil and the string transformer secondary coil are mutually in electromagnetic coupling, the string transformer primary coil is in series connection with a main transformer voltage regulating coil, and the string transformer secondary coil in series connection with the main transformer series-connection coil is connected with a wire outlet end. A rank difference voltage regulating method of the voltage regulating transformer includes the following steps that transmission voltage in the string transformer secondary coil is changed through regulating of the number of turns of the connected main transformer series-connection coil; the number of turns of the connected main transformer voltage regulating coil is regulated, so that sensing voltage in the string transformer secondary coil is changed, the sensing voltage and / or the transmission voltage are / is regulated, so that voltage of the wire outlet end of the voltage regulating transformer is changed, wherein the voltage of the wire outlet end is equal to the algebraic sum of the transmission voltage and the sensing voltage.

The invention relates to a novel stop valve. The novel stop valve is characterized in that the novel stop valve comprises a base (1), a reversing cavity (2), a piston cavity (3) and a pressure regulating cavity (4) are sequentially installed on the base (1) from bottom to top, the reversing cavity (2) is provided with an inlet and an outlet, a valve element component (5) is installed in the reversing cavity (2), the lower end of the valve element component (5) is connected with the base (1) through a reset spring (6), the upper end of the valve element component (5) is connected with an air-controlled piston (8) installed in an air pressure cavity (7) in the piston cavity (3), a diaphragm tray component (9) is installed in the pressure regulating cavity (4), and an exhaust hole (18) is formed in the middle of the diaphragm tray component (9). The pilot-operated type operating principle is adopted in the novel stop valve, and the two-position two-way stop valve can detect air source pressure and achieve automatic reversing.

The invention relates to a capillary pressure regulator. The capillary pressure regulator is characterized by comprising an upstream flow deflector, a downstream shell, a pressure regulating assembly and a spring, wherein a baffle for dividing interior of the upstream flow deflector into an upper cavity and a lower cavity which are not communicated with each other is arranged inside the upstream flow deflector; a water outlet hole is formed in the upper cavity; an air guiding pipe communicated with atmosphere is arranged on the lower cavity; a plurality of vent holes are also formed in the lower cavity; the downstream shell comprises a first cylinder body and a second cylinder body; the end part of the first cylinder body is connected with a shell connecting end of the upstream flow deflector; a plurality of positioning holes are formed in the side wall of the first cylinder body; the pressure regulating assembly is a cylindrical cavity with one opened side and one closed side; an outwardly-protruding spring installing groove is formed in the inner wall of a closed end; a positioning probe corresponding to the positioning holes is arranged on the outer wall of the closed end; the opened end of the pressure regulating assembly is connected with a pressure regulating assembly connecting end of the upstream flow deflector; a water stopping part is arranged between the opened end of the pressure regulating assembly and the pressure regulating assembly connecting end of the upstream flow deflector; and one end of the spring is pressed against the baffle inside the upstream flow deflector; and the other end of the spring is pressed against the bottom of the spring installing groove of the pressure regulating assembly.

The invention relates to a novel electric-hydraulic proportional overflow valve which comprises an overflow valve body, a pilot valve and an electric-hydraulic reversing valve. A main valve seat of the overflow valve body is installed in a main valve body. The outer surface of the main valve seat of the overflow valve body is matched with the main valve body, and the inner surface of the main valve seat of the overflow valve body is matched with a main valve element. Resetting and partial sealing are achieved on the main valve element through a spring. A runner for leading in high-pressure oil is formed in the right end of the valve body of the electric-hydraulic reversing valve. A spring is installed at the right end of the valve element of an electromagnetic valve. Axial movement of the electric-hydraulic reversing valve to the valve element is achieved under common action of spring force, hydraulic force and electromagnetic force. A push cylinder structure is composed of the valve element of the pilot valve, the valve body of the pilot valve and a cover plate; axial movement of the valve element of the pilot valve is controlled through the electric-hydraulic reversing valve; and a large-rigidity pressure-adjusting spring which is traditionally used is replaced for adjusting the pressure of the overflow valve body, and the adjusting pressure of a system is improved. The stability of the overflow valve body is improved by changing the intensity of electromagnetic force, the control precision of the overflow valve body is improved, and the novel electric-hydraulic proportional overflow valve is suitable for high-pressure large-flow hydraulic control systems.

The invention discloses a pilot-operated type overflow valve with a pressure resisting function. The pilot-operated type overflow valve comprises an oil inlet, an oil outlet, a main valve seat, a main valve element, a damping hole, a valve body, a main valve spring, a valve deck, a remote control port, a pilot-operated valve seat, a pressure adjusting spring, an adjusting screw and a pressure adjusting hand wheel. The valve body is provided with the oil inlet. The oil outlet is formed in the lower end of the valve body. The main valve seat is arranged at the upper end of the oil outlet. The main valve element is arranged at the upper left end of the main valve seat. The main valve spring is arranged at the upper end of the main valve seat. The damping hole is formed in the upper right end of the main valve seat. The valve deck is arranged at the upper end of the valve body. The remote control port is formed in the upper end of the valve deck. The pressure adjusting hand wheel is arranged at the upper left end of the valve body. The adjusting screw is fixed to the right end of the pressure adjusting hand wheel. The pressure adjusting spring is arranged at the right end of the adjusting screw. The pilot-operated valve seat is arranged at the right end of the pressure adjusting spring. The pilot-operated type overflow valve has the beneficial effects that the damping effect is good, noise is low, the pressure adjusting range is wide, and actions are sensitive.

The invention relates to a novel pneumatic three-way controller. The novel pneumatic three-way controller comprises a lower gas cavity (11), a middle gas cavity (7), an upper gas cavity (4) and an upper cover (3), all of which are sequentially connected from bottom to top. A pressure regulating screw (13) is installed in the upper cover (3), part of the pressure regulating screw (13) extends out of the upper cover (3), a first film (16) is installed between the upper gas cavity (4) and the upper cover (3), and the bottom end of the pressure regulating screw (13) is connected with a tray assembly. The novel pneumatic three-way controller is characterized in that a second film (5) is installed between the middle gas cavity (7) and the upper gas cavity (4) and a sealing ring is installed between the lower gas cavity (11) and the middle gas cavity (7), so that the lower gas cavity (11) and the middle gas cavity (7) are sealed in an airtight manner. By the adoption of the novel pneumatic three-way controller, the functions achieved through combination of a pneumatic pressure switch and a three-way pneumatic control reversing valve in the background technology can be achieved, and the controller further has the advantages of being small in whole machine size and wide in pressure regulating range.

The invention relates to a direct-acting type ratio overflow valve which comprises a ratio electromagnet, a spring base, a spring, a valve core, a valve base, a valve body and an adjusting screw, wherein a push rod of the ratio electromagnet is directly connected with the valve core or is connected with the valve core through a transition rod, the spring base is directly arranged on the end surface of the ratio electromagnet, and the spring is arranged on the spring base and the valve core; and spring force and force output by the ratio electromagnet are acted on the valve core in a superposition manner, when the input is zero, the ratio overflow valve can have high opening pressure, the adjusting screw is adjusted to change the spring force, a characteristic curve of the ratio overflow valve moves in an upper-down manner, and a dead zone of the ratio overflow valve can not be increased. According to the valve, the requirements that the direct-acting type ratio overflow valve has the high opening pressure when an input signal is zero, and when the input signal is increased, the opening pressure is increased in a ratio manner, and the dead zone is small can be met, and the cost is low.

The invention discloses a pressure regulator capable of being remotely controlled, and relates to the technical field of gas pipe networks. The pressure regulator disclosed by the invention is composed of three parts, that is, a main regulation component, a commander and a control component, wherein the control component controls the commander to set a pressure, thereby realizing remote regulation; the commander is designed to carry out spring regulation and gas regulation simultaneously, and capable of realizing local regulation and remotely-controlled regulation; and during running, a predetermined pressure is set in the spring regulation, and then the remote regulation is carried out on the basis of the predetermined pressure, so that maintenance for the pressure of a gas pipe network above the predetermined pressure in the case of a fault of the control component is ensured, downstream gas supply is ensured, and the pressure regulator is safer and more reliable. The pressure regulator disclosed by the invention has the remarkable advantages of being compact in structure, convenient to install and use, good in sealing performance, long in service life, convenient to maintain, capable of being remotely regulated and locally regulated, high in accuracy, wide in pressure regulation range and the like.

A multi-gear dry type regulating transformer is disclosed, in particular to a multi-gear dry type regulating transformer which can realize the multi-gear transformation, which comprises an iron core (1), up and down clamps (2) and high and low voltage windings and the like, wherein the high and low voltage windings are sleeved on the iron core (1), the up and down clamps (2) are arranged on the upper end and the lower end of the iron core (1), and an insulating cylinder (5) is arranged between the high and low voltage windings. No less than two low voltage coils (4) of the low voltage winding in the windings are provided, and the low voltage coils (4) are sleeved in turn from outside to inside according to the voltage, each low voltage coil (4) is provided with a tap (7), and the other end of the tap (7) is connected with an insulating terminal (8) with low voltage output of the transformer. The capacity of the transformer can be correspondingly increased owing to adopting the sleeve of a plurality of low voltage coils (4), thereby having the characteristics of simultaneously outputting various different voltage and current when in low voltage, and large voltage-adjusting range and the like. The invention can meet the device use requirements of multi-gear regulation.

The invention relates to a pressure reducing device with a temperature recovery function. The pressure reducing device is applied to occasions where high-pressure compressible fluid needs to be converted into low-pressure fluid through throttling, and obvious temperature reduction is not allowed to occur, and belongs to the field of energy conservation and utilization. The pressure reducing device comprises an intake flange (1), an intake straight section (2), a laval nozzle taper section (3), a laval nozzle divergent section (4), a straight section (5), a diffusion section (6), a discharge straight section (7) and a discharge flange (8) which are connected continuously. The device has very broad pressure reduction range, has a compact structure and no moving parts, and is not easy to crack or leak.