662 results about "Diaphragm valve" patented technology

The utility model discloses a double-butterfly-valve sterile medicine transfer system, and relates to the technical field of pharmacy. Comprising a turnover medicine storage tank, a driving butterfly valve, a driven butterfly valve, a powder storage tank and a sterile liquid medicine storage bag, a discharging port of the turnover medicine storage tank is connected with the driving butterfly valve through a first connecting piece, and the driving butterfly valve is connected with the driven butterfly valve through a second connecting piece; the passive butterfly valve is connected with a feeding port of a powder storage tank through a third connecting piece, a first diaphragm valve is arranged at a discharging port of the powder storage tank, and the discharging port of the powder storage tank is connected with a sterile liquid medicine storage bag; by adopting the design of double butterfly valves, sterile connection is established between the turnover medicine storage tank and the powder storage tank, the reliability of hoop connection is high, the structure is simple, the operation complexity is low, the universality is high, the flexibility is high, and the cost is low.

The invention relates to the technical field of heat dissipation, in particular to a piezoelectric fan which comprises an air blowing assembly and a control assembly, the air blowing assembly comprises fan blades and piezoelectric elements arranged on the fan blades, and the piezoelectric elements are attached to the fan blades and used for driving the fan blades to swing in a reciprocating mode; the one-way valve module is attached to the air blowing assembly and comprises a thin film valve which is opened in a one-way mode in the direction away from the air blowing assembly; a groove is formed in the face, facing the thin film valve, of each fan blade. The grooves are formed in the sides, facing the thin film valve, of the fan blades, on one hand, the amplitude of the fan blades is increased, and therefore the air volume is increased, and on the other hand, the air volume and the air pressure are improved; and through the arrangement of the thin film valve which is opened in the one-way direction away from the blowing assembly, backflow can be effectively restrained, compared with the prior art, the flowing direction of airflow can be effectively controlled, the air outlet amount can be increased, the overall airflow output amount is increased, and therefore the heat dissipation efficiency of the piezoelectric fan is improved.

A diaphragm valve assembly includes a bonnet portion and a body portion affixed together through a clamp structure providing pressure to a perimeter seal through angled inside surface of the clamp and matching angled surfaces of the bonnet and body portions. While the clamp provides load on the perimeter seal, a second level of sealing may be accomplished through an O-ring seal between the bonnet portion and the body portion. An adapter structure may be used to affix conventional bonnet and body portions through a clamp. The adapter structure may be implemented in various forms. A weir of the body portion and a bead of the bonnet portion may be aligned through fold-over or extended tabs of the diaphragm and cushion.

The application relates to the technical field of diaphragm testing, in particular to a diaphragm valve diaphragm service life testing device which comprises a box body and further comprises a first pipeline, a second pipeline, a water pump, an intermediate pipeline, a first testing part and a control part, wherein: one end of the second pipeline is in communication with the upper end of the first pipeline, and the other end of the second pipeline is in communication with the intermediate pipeline; the water pump is connected in series on the second pipeline; the first testing part comprises a testing pipeline, one end of the testing pipeline is in communication with the intermediate pipeline, the other end of the testing pipeline is located in the interior of the box body, the testing pipeline is provided with an opening, a clamping piece is arranged on the periphery of the opening, the clamping piece is used for mounting a diaphragm, a circular ring is arranged on the periphery of the clamping piece, a water-sensitive sensor is arranged in the circular ring, a driving part is arranged above the testing pipeline, the driving part is drivingly connected with a tension sensor, and a connecting rod is arranged at the bottom of the tension sensor. The diaphragm deformation life and the diaphragm rupture life can be simultaneously detected, and the comprehensiveness of diaphragm detection is improved.

Disclosed is a corrosion-resistant diaphragm valve, including a valve cover, a thick film diaphragm sheet clamped and pressed jointly by the valve cover and a supporting block, and a valve seat above which the valve cover is coupled. A first lower opening of the valve cover is embedded with the supporting block to limit a movement space of a pneumatic piston member, and a second lower opening of the supporting block is embedded with a guided diaphragm pressing block, and the diaphragm pressing block is connected to one end of the pneumatic piston member. A straight sealing convex strip extending through a valve head is disposed at a bottom of the thick film diaphragm sheet. A curved runner C-shaped opening is formed in a curved runner structure which is bent upwards in a flattened curve; and the straight sealing convex strip is aligned with and pressed against an arc-shaped dam.

The utility model discloses an anti-loosening sealing diaphragm valve which comprises a valve body, a valve cover, an actuator, a valve cavity, a valve rod, a flow channel, a valve clack and a diaphragm. An inner shell is arranged in the valve cavity, an inner sliding block which is limited in the inner shell and slides in the horizontal direction is arranged in the inner shell, an embedded block is fixedly arranged at the left end of the inner sliding block, an embedded groove is formed in the right end of the valve rod, and when the flow channel is cut off by the valve clack, the embedded groove is just located on the left side of the embedded block. A driving spring for providing driving force for the embedded block to be embedded into the embedded groove is arranged in the inner shell; and an inclined guide contact surface is arranged on the embedded block. The utility model has the following advantages and effects: the inner sliding block can keep moving leftwards under the driving force of the driving spring, and then can push the embedded block to be embedded into the embedded groove of the valve rod, so as to lock the valve rod; longitudinal reciprocating offset of the valve rod is avoided, and the sealing performance of the valve clack is improved.

The invention discloses a diaphragm valve flow test system and method, and the system comprises a first test assembly and a second test assembly, and a first pressure measurement port of the first test assembly and a second pressure measurement port of the second test assembly are respectively communicated with a to-be-tested valve; a first test pipeline communicated with the first test assembly is provided with a circulation path in a first direction; a second testing pipeline communicated with the second testing assembly is provided with a circulation path in the first direction. The upstream and downstream pressure values of the to-be-tested valve can be accurately detected through the first pressure gauge and the second pressure gauge, and the gas flow value is detected through the flow meter and substituted into a calculation formula to obtain an accurate flow coefficient value; the upstream first testing assembly and the downstream pressure measuring device are arranged at a specific distance according to the pipe diameter of the communicating pipeline, and the accuracy of the pressure value can be effectively ensured through the limitation of the pipe diameter and the distance; the actual temperature value of the fluid in the test system pipeline is monitored through the thermometer, and the influence of the temperature on the test result is effectively reduced.

The utility model discloses a diaphragm valve which comprises a valve body, a cover body, a diaphragm, a driving assembly and a pressing block. A non-return piece is integrally arranged on the valve main body and extends upwards on the outer side of the neck part; a limiting bulge is arranged on the skirt part; wherein the non-return piece and / or the limiting protrusion are / is provided with a guide face facilitating movement of the cover body in the locking direction, and when the cover body is combined with the valve body and locked, the diaphragm abuts against the valve body. The limiting protrusion is connected to the non-return piece in a clamped mode so as to limit the cover body to move in the unlocking direction. The non-return piece and the valve main body are integrally arranged, the situation that the non-return piece and the valve main body are not installed in place, and therefore free reverse rotation of the cover body cannot be blocked is avoided, the non-return piece is arranged to be of an upward extending structure, the non-return piece is made to deform more easily, and when the cover body is rotated to enable the cover body and the valve main body to be locked or unlocked, the non-return piece is not prone to deformation. The non-return piece can deform towards the space between the non-return piece and the valve body, and the problem that the whole valve body is replaced due to the fact that the non-return piece is broken is avoided.

The utility model provides a dental treatment machine for pets, which comprises a mobile phone operating platform for performing dental treatment on the pets, the mobile phone operating platform comprises a plurality of hanger valves and a plurality of mobile phones which are matched with the hanger valves and controlled by the hanger valves, and the dental treatment machine for the pets further comprises a gas circuit and a water circuit, the hanger valve is communicated with the air channel and controls the opening and closing of the air channel; the mobile phone is communicated with the air path and the water path so as to realize air inlet and outlet and water inlet and outlet of the mobile phone; and the gas path and the water path are divided into multiple paths through the same multi-union diaphragm valve and are respectively communicated with the plurality of mobile phones. The water path and the air path are divided into multiple paths by utilizing the multi-connected diaphragm valve, so that the air path and the water path which are divided into multiple paths are respectively connected to a plurality of functional devices, especially a plurality of mobile phones, the control and the operation of the plurality of functional devices are realized, the whole system is very compact in structure and small in size, and the cost is also saved.

The utility model relates to a feed liquid atomization device, and belongs to the technical field of cigarette manufacturing. The device comprises a cold compressed air heating steel pipe spirally wound on a steam pipeline, a glass fiber thermal insulation material, a thermal insulation cover shell, a pneumatic diaphragm valve, a PLC (Programmable Logic Controller), a temperature sensor, a cold compressed air supply device and a double-medium nozzle, an inlet of the cold compressed air heating steel pipe is communicated with a cold compressed air supply device, an outlet of the cold compressed air heating steel pipe is communicated with the double-medium nozzle pre-filled with feed liquid through a hot compressed air circulation pipeline, and a compressed air stop valve is arranged on the hot compressed air circulation pipeline; the heat preservation cover shell completely wraps the cold air heating steel pipe, the space between the heat preservation cover shell and the cold air heating steel pipe is filled with glass fiber heat preservation materials, and an inlet of the cold air heating steel pipe and an outlet of the cold air heating steel pipe both extend out of the heat preservation cover shell. The accuracy of the total feeding proportion can be ensured.

The tempering technology comprises the following steps of preparation before the technology, diaphragm tempering, discharging and inspection, tempering equipment comprises a tempering furnace body, a rotary clamping mechanism is arranged on the inner side of the tempering furnace body and comprises a rotary assembly and a clamping assembly, the rotary assembly comprises a first supporting plate, and the clamping assembly comprises a second supporting plate; a plurality of limiting discs are fixedly installed on the first supporting plate in a circumferential array mode, a driving disc is rotationally connected to the bottoms of the limiting discs, a plurality of hanging bases are arranged between the limiting discs and the driving disc in a circumferential array mode at equal intervals in a rolling mode, hanging columns are fixedly connected to the bottoms of the hanging bases, and a plurality of sets of hanging plates are arranged on the hanging columns in a circumferential array mode; according to the design, by rotating the clamping mechanism, it is guaranteed that intervals exist between the diaphragms, the position of the clamping mechanism in the tempering furnace body can be adjusted to a great extent, a static thermal boundary layer is broken through, the diaphragms can be evenly heated and cooled, and the defect that residual stress is not evenly distributed is overcome.

The utility model relates to a storage tank vacuum flush valve which comprises a connecting base, a vacuum pipe is arranged on the connecting base, the bottom end of the vacuum pipe extends into a water storage tank, a vacuum valve body is arranged on the vacuum pipe, a diaphragm valve connecting seat is arranged in the vacuum valve body, and the interior of the vacuum valve body is divided into an air inlet cavity and a vacuum cavity through the diaphragm valve connecting seat. An air suction pipe is arranged on the outer side wall of the vacuum valve body, one end of the air suction pipe is communicated with the interior of the vacuum cavity, a vacuum pump is arranged at the other end of the air suction pipe, a vacuum diaphragm valve is arranged on the diaphragm valve connecting seat, and accumulation and release of water resources in the storage tank in the vacuum pipe are achieved through the vacuum pump. In the quick release process, sludge at the bottom of the reservoir is flushed. The device has the effect of reducing water resource loss.

The invention relates to the technical field of diaphragm valves, in particular to a valve adjusting mechanism and a diaphragm valve based on the valve adjusting mechanism, the valve adjusting mechanism is installed on the diaphragm valve and comprises a rack, an adjusting device and a driving mechanism, and a positioning piece and a linear driving assembly used for controlling the positioning piece to ascend and descend are movably arranged in the rack; an executing part connected with the diaphragm is arranged in the rack, the adjusting device comprises a coarse adjusting assembly and a fine adjusting assembly, the coarse adjusting assembly and the fine adjusting assembly are both used for controlling the executing part to move, the driving mechanism comprises a rotary driving assembly and a connecting assembly, and the rotary driving assembly is connected with the coarse adjusting assembly and the fine adjusting assembly through the connecting assembly. According to the diaphragm valve, the function of rapidly and accurately adjusting lifting of the executing part is achieved, the executing part drives the diaphragm to be opened and closed, then the flow of the diaphragm valve is accurately adjusted, and the problem that the adjusting precision of an existing diaphragm valve cannot meet the use requirement is solved.

A diaphragm valve for an ultra-pure pipeline comprises a valve deck, an upper valve body and a lower valve body, the upper valve body and the lower valve body are fixedly connected through a bolt, a valve rod, a valve clack, a medium inlet channel and a medium outlet channel are arranged in the lower valve body, a mounting channel is formed in the lower valve body, a plurality of positioning guide grooves which are vertically formed at intervals are formed in the inner wall of the mounting channel, and the positioning guide grooves are communicated with the valve deck. The outer wall of the valve cover is provided with a positioning guide block matched with the positioning guide groove, the bottom of the installation channel extends to be provided with a limiting check ring, the bottom of the valve clack is connected with a cushion membrane piece and a diaphragm piece, the periphery of the cushion membrane piece and the periphery of the diaphragm piece extend to the position between the limiting check ring and the valve cover, and the valve cover is provided with a limiting step. The upper valve body is fixedly connected with the lower valve body in a threaded mode and then abuts against the limiting step, so that the valve deck is fixedly installed in the installation channel, and sealing connection is formed.

The invention relates to a diaphragm for a diaphragm valve. The diaphragm has a functional region and a fastening portion, which surrounds the functional region. In a relaxed state, the functional region includes a central portion, which protrudes on a wet side of the diaphragm; —a lateral portion, which protrudes on a dry side of the diaphragm, the lateral portion being curved, at least in parts, toward the dry side of the diaphragm; and an intermediate portion, which is arranged between the central portion and the lateral portion and is curved, at least in parts, toward the wet side of the diaphragm.

A pneumatic diaphragm valve service life testing device comprises an air source and a control valve connected with the air source, the control valve is divided into two paths, one path is a control air path, and the other path is a testing air path. The test gas circuit is used for connecting at least one diaphragm valve group, valve bodies of tested pneumatic diaphragm valves in the diaphragm valve group are sequentially connected in series, and the tail end of the valve body of the tested pneumatic diaphragm valve located at the last position is plugged by a plug. The control air path is provided with an electromagnetic valve controlled by the PLC, and an air outlet of the electromagnetic valve is used for being connected with a pneumatic switch air inlet of each tested pneumatic diaphragm valve in the diaphragm valve group. The testing device can test the service life of the pneumatic diaphragm valve in batches, and the testing efficiency is high.

The invention provides a self-adaptive load fluctuation hydrogen production system control method and related equipment, and the method comprises the steps: obtaining the output current of a hydrogen production power supply and the internal and external pressure difference of a hydrogen-oxygen separator in real time, calculating the load change rate of an electrolytic cell according to the output current, and when the load change rate of the electrolytic cell is greater than or equal to a preset threshold value, calculating the load change rate of the electrolytic cell according to the output current; a time delay compensation factor is introduced to calculate the first opening degree of the hydrogen-oxygen side pneumatic diaphragm valve, and feedforward control is conducted on the hydrogen-oxygen side pneumatic diaphragm valve through an executing mechanism so that the hydrogen-oxygen side pneumatic diaphragm valve can meet the first opening degree; otherwise, the pressure difference and the load ratio of the electrolytic cell serve as input of the fuzzy controller, the second opening degree of the hydrogen-oxygen side pneumatic diaphragm valve is calculated according to output of the fuzzy controller, and fuzzy PID control is conducted on the hydrogen-oxygen side pneumatic diaphragm valve through the executing mechanism so that the hydrogen-oxygen side pneumatic diaphragm valve can meet the second opening degree. The control precision of the hydrogen production system can be improved, and stable operation of the hydrogen production system is guaranteed.

The invention discloses a fluid pipeline system diaphragm valve fault self-adaptive identification method, relates to the technical field of diaphragm valves, and solves the problems that signal characteristics are not subjected to fine analysis and are easily interfered by fluctuation of normal working conditions. The method comprises the following steps: acquiring a to-be-determined wave band, comparing the to-be-determined wave band with a preset standard waveform, identifying a to-be-verified amplitude associated with a corresponding processing process based on a corresponding movement comparison processing process, carrying out abnormity determination on a diaphragm valve based on a specific numerical value of the to-be-verified amplitude, and confirming an abnormal diaphragm valve. The specific accuracy of amplitude verification in the subsequent movement process is facilitated, the abnormal influence caused by signal fluctuation can be effectively reduced, and the specific accuracy in the valve abnormality determination process is improved.

The invention relates to the field of fluid control devices in semiconductor liquid paths, and provides a precise control on-off valve for a semiconductor liquid path and an assembling method thereof, and the precise control on-off valve comprises a valve seat, a cylinder assembly combined on the valve seat, a diaphragm valve plate accommodated in the valve seat, and an adjusting wheel arranged on an upper cover of the cylinder. The air cylinder assembly comprises an air cylinder upper cover and an air cylinder body which are connected through a rotary lock catch structure, and a piston assembly and a limiting rod set are assembled in the air cylinder assembly. And the diaphragm valve plate is driven by the cylinder assembly to seal or separate from the valve port of the valve seat. The adjusting wheel is connected with the limiting rod set and used for adjusting lifting of the limiting lead screw, and then the maximum upward moving position of the piston assembly and the opening degree of the valve are precisely limited. The valve breaks through the bottleneck that a traditional mechanical valve is prone to abrasion and leakage, achieves the effect of precise fine adjustment of flow, and meanwhile greatly improves the flow stability of long-term operation and the clean safety of an ultra-pure fluid system.

The invention relates to the field of diaphragm valve control mechanisms, in particular to a valve actuator and a using method thereof.The valve actuator comprises a valve body and a valve deck fixed to the top of the valve body and further comprises an actuator mechanism, and the actuator mechanism comprises a lower cylinder cover, a cylinder body and an upper cylinder cover which are vertically communicated in sequence; a piston rod penetrating out of the valve deck downwards is arranged in the middle of the upper cylinder cover in a penetrating mode, and the cylinder body is divided into an upper air chamber and a lower air chamber by a piston disc outside the piston rod. The rotatable sliding ring is arranged to be communicated with the upper air pipe connector and the lower air pipe connector, two-degree-of-freedom flexible adjustment of the circumferential position and the rotation direction of the air pipe connector is achieved, and the problem of installation adaptation caused by the fact that the position of an existing actuator air pipe connector is fixed is solved; the sliding ring is unlocked by squeezing the two sets of elastic pieces to be close to the supporting ring, the air pipe connector is driven to adjust the circumferential distribution position so as to adapt to different circumferential layouts of external air path connectors, and operation is convenient and fast.

The utility model discloses a valve interlocking device. The valve interlocking device comprises a first valve assembly and a second valve assembly, the first valve assembly comprises a first pneumatic valve and a first pneumatic control valve, and the first pneumatic valve and the first pneumatic control valve are both used for being connected with a first diaphragm valve; the second valve assembly comprises a second pneumatic valve and a second pneumatic control valve, and the second pneumatic valve and the second pneumatic control valve are both used for being connected with a second diaphragm valve; wherein the first pneumatic valve is connected with the second pneumatic valve, the first pneumatic valve is connected with the second pneumatic valve, and the first pneumatic valve is connected with the second pneumatic valve, so that valve interlocking of the first diaphragm valve and the second diaphragm valve is achieved. According to the utility model, the valve interlocking of the first diaphragm valve and the second diaphragm valve is realized through the first pneumatic valve, the second pneumatic valve, the first pneumatic control valve and the second pneumatic control valve, and compared with the valve interlocking mode that the first diaphragm valve and the second diaphragm valve are mechanically interlocked only through the pneumatic valves in the prior art; and quick interlocking and frequent switching of the valve are ensured.

The invention relates to the technical field of diaphragm valves, and provides a grinding fluid diaphragm valve for semiconductor CMP equipment and an assembling method of the grinding fluid diaphragm valve. The diaphragm valve comprises a valve seat, a wear-resisting diaphragm piece and an adjusting assembly, an inclined annular step face of 3-10 degrees is arranged in the valve seat, the wear-resisting diaphragm piece is provided with a rubber body, a PTFE wear-resisting layer and an embedded threaded piece with a limiting part, and the adjusting assembly comprises an adjusting rod, a diaphragm connecting shaft pressing block, a hand wheel and a movable limiting adjusting nut. Static sealing of non-limit pre-pressing is achieved through slope contact, a runner dead zone is eliminated, and grinding liquid is prevented from crystallizing; the wear resistance is improved through the PTFE wear-resistant layer; the unique design of the limiting adjusting nut allows setting of a closing stroke or reserving of a closing gap, and flexible switching between a full-closing mode and a crystallization leakage prevention mode is achieved. The invention has the characteristics of high cleanliness, long service life and strong process adaptability, and is suitable for semiconductor precision fluid control.

The utility model belongs to the field of air filters, and particularly relates to a high-pressure dewatering filter which comprises a barrel-shaped main body, a pressure regulating assembly, a valve assembly and a filter element, the valve assembly and the filter element are arranged in the main body, and an air inlet and a drain valve are arranged on the lower portion of the main body. The pressure regulating assembly is a spring type pressure regulating assembly; the valve pad and the ball valve element are matched and placed in the valve cavity. A pad hole connected with the middle channel is formed in the bottom of the valve pad, and a first pad channel connected with the first transverse channel is formed in the side face of the valve pad. The upper end of the valve rod abuts against the lower portion of the pressure adjusting assembly, and the lower end of the valve rod abuts against the ball valve element. The pressure regulating assembly abuts against the ball valve element through the valve rod, so that the valve element and the valve pad are in contact sealing. Compared with a conventional filter of a diaphragm valve structure, the spherical valve element and the valve pad are high in abrasion resistance and can work for a long time under high pressure. In addition, the structure is easy to disassemble and assemble, and the filter element can be conveniently replaced.

The invention discloses a device and a method for detecting abnormal action of filling valves. The device comprises a filling cylinder, a plurality of filling valves, false cups for sealing discharge ports of the filling valves, a first pressure sensor connected with the filling cylinder, an air inlet pipe with a first diaphragm valve, an exhaust pipe with a second diaphragm valve, and a second pressure sensor connected with the false cups and the exhaust pipe. And the controller is in control connection with each component. The method comprises the steps that the false cup and the second diaphragm valve are closed, and the first diaphragm valve injects gas into the filling cylinder; the controller sequentially controls the filling valves to be opened independently, the pressure of the filling cylinder and the pressure of the exhaust pipe are monitored through the first pressure sensor and the second pressure sensor, if the pressure of the second pressure sensor reaches a first preset threshold value, opening is judged to be normal, and otherwise, opening is abnormal; the filling valves are closed after detection, the second diaphragm valve is opened to release the pressure to a second preset threshold value and then closed, and the next filling valve is switched; and if abnormity is detected, pausing and alarming. The opening state of the filling valve is accurately judged through dual pressure detection, misjudgment is avoided, efficiency is high, and cost is low.

The utility model belongs to the field of diaphragm valves, and particularly relates to an integrated dual-drive controlled fluorine-lined diaphragm valve which comprises a valve body, a valve rod is arranged on the surface of the valve body in a penetrating mode, an operation assembly is arranged at the top of the valve rod, one side of the valve body is fixedly communicated with a connecting pipe, a movable pipe is arranged in an inner cavity of the connecting pipe, and the movable pipe is connected with the valve rod. The right side of the moving pipe extends to the right side of the connecting pipe and is fixedly sleeved with a connecting disc. The operation assembly comprises a rotating box, the bottom of the rotating box is fixedly connected with the valve rod, the top of the rotating box is fixedly connected with a hand wheel, and the surface of the rotating box is sleeved with a fixing shell; by arranging the operation assembly, the inserting rod can be inserted into the inserting hole to fix the rotating box, limiting of the valve rod is achieved, the stability of the valve rod is improved, the valve rod is prevented from rotating, by arranging the adjusting assembly, the using length of the whole valve body can be prolonged by adjusting the moving pipe, and the requirements for different installation space lengths can be met.

The invention relates to the technical field of diaphragm valves, and aims to solve the problems that a traditional diaphragm valve needs to be shut down when worn parts are replaced, disassembly is tedious, and sealing performance is insufficient. The diaphragm valve comprises a valve body, a valve middle cover, a valve top cover, a connecting assembly, a valve handle, a diaphragm piece, a valve screw rod, a torsion nut, a torsion limiting buckle and a locking ring, locking clamping teeth on the outer wall of the locking ring are matched with limiting clamping teeth on the side wall of an inner cavity of the valve top cover, the position of the valve is locked, and when the valve body is in a closed state, the diaphragm piece can be separated from the valve screw rod. Replacement of the valve handle and the torsion limiting buckle is completed, and replacement of abraded parts can be completed without shutdown; the connecting assembly is composed of a connecting insertion pipe, a limiting end cap, a pressing assembly, an elastic assembly and a compression spring, rapid disassembly and assembly can be achieved without tools, and the problem that a traditional long screw is tedious in disassembly is solved.

The application relates to the technical field of agricultural irrigation water treatment, and discloses a flow regulating valve which comprises a valve seat, a valve shell, a valve core and an elastic diaphragm, the valve seat is provided with a left-right through flow hole, a cylindrical valve core is sealingly connected to the left side of the valve seat corresponding to the position of the flow hole, a plurality of openings are arranged on the valve core wall in a circumferential direction, an elastic diaphragm is sealingly wrapped on the outer side of the valve core corresponding to the positions of the openings, a water passing inner cavity which is left-right through and sealingly communicated with the flow hole is formed between the elastic diaphragm and the valve core, the valve shell is sleeved on the outer side of the valve core and sealingly connected to the valve seat at the left end, and an adjusting outer cavity which is closed at the left end and opened at the right end is formed between the valve shell, the valve seat, the valve core and the elastic diaphragm. The application has a reasonable structure, the water passing section area of the water passing inner cavity can be adjusted according to the water head, so that the flow rate is relatively stable, the whole device is controlled by hydraulic self-driving, no manual cost or electric energy consumption is needed during operation, and the operation cost is low.

Diaphragm valve housing, with at least two axially extending fluid channels (10, 12) which are aligned with and converge towards each other, a partition (38) between the fluid channels (10, 12) which has a free end towards a valve chamber (32) and with its free end forms a valve seat (26) which lies between adjacent openings (28, 30) of the fluid channels (10, 12), wherein the fluid channels (10, 12) each have a cylindrical axial section (34, 36) and a channel end section (40, 42) adjoining the axial section (36) and extending laterally and obliquely towards each other, towards the valve chamber (32) relative to the axial direction (A) of the axial sections (34, 36), which are separated by the partition (38), characterized in that the partition (38), viewed in axial longitudinal section, has a axial direction (A) flatter inclined section (44, 46) near the valve seat (26) and an adjoining,has a steeper section (48, 50, 82, 84), wherein the inclined section (44, 46) and the steeper section (48, 50, 82, 84) are formed in longitudinal section view by a straight section, wherein the inclined section (44, 46) transitions at its lateral ends, perpendicular to the axial direction (A) and viewed in plan view of the valve seat (26), into arcuate sections (52, 54), and wherein the arcuate sections (52, 54) transition into the steeper sections (48, 50) towards the axial section (34, 36).

The present invention discloses a diaphragm valve performance testing device, which includes a valve core, a connecting flange, a communicating pipe, a control valve and an execution controller. The valve core is connected to the communicating pipe through the connecting flange. The execution controller is connected to the valve core through the control valve. A control box is arranged on one side of the execution controller above the control valve. A control button and a fixing sleeve are arranged between the control box and the execution controller. A fixing plate, an air inflation pump, an air extraction pump and a fixing box are arranged inside the control box. The diaphragm valve performance testing device of the present invention belongs to the technical field of diaphragm valves. By controlling the inflation degree of the inflation airbag through the air inflation pump and the air extraction pump, the telescopic air column can be made to contact the limiting plate, which can avoid the trouble of workers operating the control button. The limiting plate is used for limiting, so as to avoid damage to the keys of the execution controller due to excessive pressing force during frequent pressing, and the connecting column is reset through the telescopic spring.