48results about How to "Good non-return effect" patented technology

The invention provides an aerator belonging to the technical field of water treatment, and aiming to solve the problem that in the existing aerator, foreign matters get into a pipeline easily and cause unstable operation of the aerator. The aerator provided by the invention comprises a mounting seat, wherein an inlet air cavity is formed in the middle of the mounting seat; an air inlet is formed in the bottom of the inlet air cavity; an air outlet is formed in the top of the inlet air cavity; a cutting component is arranged above the inlet air cavity; a vibrating diaphragm prepared from a rubber material is arranged at the air outlet and comprises a lamellar positioning part and an inclined sealing part; a supporting frame matched with the shape of the lower surface of the vibrating diaphragm is fixedly connected with the air outlet; the vibrating diaphragm is kept close to the upper surface of the supporting frame; on the supporting frame, an exhaust through hole communicated with the inlet air cavity is formed below the sealing part of the vibrating diaphragm; the positioning part of the vibrating diaphragm is fixedly connected to the supporting frame. Because the vibrating diaphragm is arranged at the air outlet to prevent cement from entering an air inlet pipeline, the aerator is relatively stable in operation.

A one-way valve assembly is provided in the present invention, including a central member, a valve seat, a valve plate and a plug member. The central member includes a first inner compartment and a first through hole. The valve seat includes a second inner compartment and a second through hole. A plurality of recesses are formed on the bottom surface of the second inner compartment, so the second through hole is spaced apart from the bottom surface of the second inner compartment. The valve seat is seated inside the first inner compartment. The valve plate is seated inside the second inner compartment of the valve seat. The plug member includes a third through hole, and is seated inside the first inner compartment of the central member so the valve seat and the valve plate are restricted in the first inner compartment between the plug member and the central member.

The invention discloses a check valve which comprises a check valve plate, a plurality of supporting parts extending outwards from the periphery of the check valve plate, and positioning columns extending from one side of the check valve plate. The invention further discloses a scroll compressor provided with the check valve. According to the check valve, the clearance volume is small, the check effect is good, thermal expansion of a high pressure refrigerant in an enthalpy-increasing pipeline can be effectively reduced, and the energy efficiency of the compressor when the enthalpy-increasing working condition is not started can be improved. Meanwhile, the check valve is simple in arrangement, convenient to manufacture and machine, low in cost, simple in check principle, and capable of being used for checking of enthalpy-increasing pipelines on vertical and horizontal scroll compressors as well as being used for check channels of enthalpy-increasing channel structures.

The invention relates to the technical field of medical liquid parts and provides a buoyancy type non-returning transfusion device. The buoyancy type non-returning transfusion device comprises a non-returning shell and a floater, wherein a liquid inlet channel and a liquid storage cavity are arranged in the non-returning shell; the upper part of the liquid inlet channel is provided with a liquid inlet formed in the non-returning shell; a communication channel is arranged between the liquid inlet channel and the liquid storage cavity; a liquid outlet is formed in the bottom of the liquid storage cavity; the floater, which can float up when the liquid level height of medicine liquid exceeds the lowest limitation and block the liquid outlet when the liquid level height of the medicine liquid is lower than the lowest limitation, is arranged in the liquid storage cavity above the liquid outlet in a sleeving manner. According to the buoyancy type non-returning transfusion device, the liquid inlet channel and the liquid storage cavity are separately arranged and the acting force on the floater by liquid drops can be effectively eliminated; the restriction of a liquid dropping to a gap between the floater and the liquid storage cavity, and a medicine liquid dropping flow channel and the flow speed can also be effectively eliminated; the non-returning effect is good and the manpower is freed; patients or accompanying people do not need to observe liquid dropping conditions all the time; the adaptability of adopting the buoyancy to control the rising and falling of the floater is strong, the utilization requirements of a plurality of types of medicine liquid can be met and the popularization is convenient.

The invention discloses a flange type silencing check valve. The flange type silencing check valve comprises a valve body, a first flange arranged at a water inlet end of the valve body, and a secondflange arranged at a water outlet end of the valve body; a cavity is formed in the valve body; a guide device is arranged in the cavity, and is used for placing water currents to reversely flow; the guide device comprises a first sealing plate, a connecting rod, a cover plate and a valve base; the valve base is fixedly arranged in the valve body and near the water outlet; the valve base is provided with a first through hole for enabling the connecting rod to pass through; one end of the connecting rod is connected with the first sealing plate; the connecting rod penetrates through the valve base, and can perform a reciprocating motion in the valve base; and the other end of the connecting rod is connected with the cover plate. Through the mode, the flange type silencing check valve is provided with the guide device to achieve flexible closing, good check effect, capability of effectively reducing the closing noise, novel structure, smooth liquid passing and low local water head loss.

The invention discloses a multipurpose tying belt structure. The multipurpose tying belt structure comprises a toothed belt part with inclined teeth formed on one side surface and a tip part located at one end of the toothed belt part; n single-connecting parts and n-1 double-connecting parts are arranged at the other end of the toothed belt part, wherein the n is greater than or equal to 2; the single-connecting parts and the double-connecting parts are arranged in a staggered mode and are connected through transition belts; and the tip part, the toothed belt part, the single-connecting parts, the double-connecting parts and the transition belts are integrally formed. The multipurpose tying belt structure has the beneficial effects that grouping binding by adopting the single tying belt is achieved, and wires of each group are independent, so that the number of the used tying belts is reduced, and the waste is reduced accordingly; the extrusion for the wires is reduced, and the spaceutilization rate of wiring is improved; the wire groups can be prevented from falling off, and the stability is good to facilitate later positioning and fixing; and when the single group of the wiresis bound and fixed, the toothed belt part can sequentially pass through the single-connecting parts and the adjacent double-connecting parts, so that the non-return performance of the toothed belt part is improved, and the binding stability of a wire harness is improved.

The invention discloses an anastomat with a mistaken triggering prevention safety mechanism, and belongs to the technical field of medical instruments. The anastomat is characterized by comprising a fixed box, the left side of the fixed box is fixedly connected with a nail bin seat, the top of the fixed box is provided with a connecting cover, the left side of the connecting cover is fixedly connected with a nail abutting seat, and the nail abutting seat is fixedly connected with the connecting cover. A sliding bin is formed in the fixed box from left to right. Through arrangement of a second rack, when a medical worker presses the second rack, a first rack can be rapidly rotated through the second rack, after the first rack is separated from a first gear, a worker can normally rotate a rotating handle, and a first spring is matched for use; after the medical staff loosens the second rack, the first spring can quickly drive the second rack to move outwards without manually resetting the second rack by the staff, so the second rack quickly reversely rotates the first rack through the second gear, the first gear is firmly fixed, and a good limiting effect is further achieved.

The invention discloses a check stop valve which is good in check effect. According to the technical scheme, the check stop valve comprises a valve body, a valve clack and a valve rod used for driving the valve clack to do the vertical linear motion, and an isolation inner wall with an opening is arranged in the valve body; an inlet cavity and an outlet cavity are formed on the two sides of the isolation inner wall respectively, and are communicated through the opening; the lower end of the valve clack is a working portion in an inverted circular truncated cone shape, and the working portion comprises a sealing inclined surface and a bottom; the sealing inclined surface can be tightly attached to the isolation inner wall, and a limiting hole is formed on the bottom; a spring is connected to the inner wall of the limiting hole, and the other end, opposite to the limiting hole, of the spring is connected with a check part capable of covering the opening of the isolation inner wall; and when the sealing inclined surface is located above the isolation inner wall, the spring is in the shrinkage state, and the check part covers the opening. The check stop valve can effectively prevent fluid from flowing back, and the manufacturing cost is low.

The present invention relates to multi-layered non-woven structures being useful as components of disposable absorbent articles and garments comprising super absorbent particles and thereby acts as a core. The invention thereby ensures that the body fluids can penetrate from a first layer, which acts as an acquisition layer, up to a third layer comprising SAP particles, the second non-woven layer serving to decrease the fluid volume per surface unit, as a conventional dispersion layer. However the second layer of the invention additionally acts like a non-return valve, preventing, or at least strongly limiting, any fluid transfer from the third layer to the first layer. Channels free of SAP can additionally be design to improve the inlet and rewet properties of the multilayer acquisition and distribution sheet non-woven material.

The invention discloses a three-way reversing check valve. The three-way reversing check valve comprises a valve body, wherein the valve body is arranged in a cross shape, the top end of the valve body is fixedly connected with a valve cover through a stud and a nut, the lower end surface of the valve cover is provided with a cylindrical fixed seat, a main valve rod which is arranged in the vertical direction is fixedly connected into the fixed seat through an insertion rod, a fixed part which is fixedly connected to the valve body sleeves the main valve rod, the fixed part is provided with apressure plate which is clamped by the valve body and the valve cover, an auxiliary valve rod which is coaxial with an inlet and an outlet of the valve body is fixed on the main valve rod, a first valve clack sleeves the end of the main valve rod, and a second valve clack sleeves the end of the auxiliary valve rod. When the three-way reversing check valve is connected to be used, a valve seat canbe disassembled to change the check situation, the three-way reversing check valve can be used as a three-way check valve and also can be used as a one-way check valve, the applicability is high, andthe time and financial resources can be effectively saved for enterprises; and meanwhile, the three-way reversing check valve is good in check effect and capable of precisely controlling the flow direction of a medium.

The invention discloses a corner valve joint with constant flow and non-return functions. The joint comprises a connector, a barrier, a water outlet part, a first joint and a second joint, wherein theconnector is fixedly connected to the second joint, the first joint and the second joint are detachably connected, and a water blocking block is arranged at the end, towards the first joint, on the connector. The water outlet is arranged at the end, away from the water blocking block, of the connector. The water outlet is internally provided with a water supply cavity, the barrier is arranged inthe water supply cavity and comprises a first connecting column and a baffle, the first connecting column is sleeved with the baffle, and the first connecting column is further sleeved with an elasticring. The elastic ring abuts against the side, towards a water inlet, of the baffle. Through the elastic deformation of the elastic ring, the size of the gap between the elastic ring and the inner wall of the water outlet part is changed, so that the water outlet speed of a water outlet hole can be kept unchanged under different water pressures.

The invention discloses a discharge flue non-return device which is simple in structure, is convenient to install, has great non-return sheet stroke, forms low resistance by a non-return sheet in a discharge flue, and can obtain great and effective smoke discharge area. The discharge flue non-return device comprises a discharge flue and the non-return sheet arranged in the discharge flue, wherein the inlet side of the discharge flue is provided with a coupling path which corresponds to the non-return sheet, protrudes toward the interior of the discharge flue, has the radial size less than the corresponding radial size of the non-return sheet and/ or the discharge flue; the outlet of the coupling path forms the input inlet of the discharge flue; and the port surface of the outlet of the coupling path is a plane or an oblique surface relative to the radial direction.

A check valve special for ammonia gas is related to a special valve and comprises a valve body, a bonnet, a valve seat and a valve clack, the valve seat is fixed in the valve body, the valve body comprises a middle connecting port, an inlet and outlet of the valve body are provided respectively with joint flanges, the middle connecting port is provided with a connecting flange, the inlet and outlet are positioned on a same axis, and the middle connecting port is positioned perpendicular to the inlet and outlet; the bonnet is hermetically fixed to the connecting flange through a plurality of bolts and nuts; the center of the inner end surface of the bonnet is integrally provided with a guide sleeve, a valve clack rod is fitted in the guide sleeve, and a travel distance of the valve clack is less than a distance from a free end surface of the guide sleeve to the valve clack; an end surface of the valve seat in contact with the valve clack is provided with a circular deformed groove, polytetrafluoroethylene resin seal is disposed in the deformed groove, an end surface of the valve clack in contact with the valve seat is provided with a circular conical surface, and the conical surface mates with the polytetraflouroethylene resin to form a sealing pair. The valve has good sealing effect, good corrosion resistance and long service life.

The invention provides a non-return structure of a ventilator, an electric motor which consists of a coil and a rotor drives the blades fixed or connected with the rotor, the motor is supported and arranged on a case which is earthed or has the denoising function; the non-return bladed are annular in shape and are returned by a spring which has small pressure; in this way, the ventilator can better adapt to the annular ventilation structure and has good non-return effect.