193results about How to "Save construction space" patented technology

The invention belongs to the technical field of underground coal mine pipeline installation, and particularly relates to a large-pipe-diameter-range pipeline installation mechanical clamping jaw suitable for an underground coal mine roadway, which comprises a fixed installation part, a fixed jaw, a movable jaw, a fixed hydraulic cylinder and a movable hydraulic cylinder. Pipelines with different diameters in a large pipe diameter change range can be grabbed; six groups of rubber rollers are mounted on the fixed jaw and the movable jaw, and at least one group of driving rubber rollers capable of actively rotating can extrude the pipeline and drive the pipeline to roll in the clamping jaw through extrusion contact of the rubber rollers and the pipeline, so that the relative position of a pipeline mounting flange bolt hole is adjusted, and smooth butt joint and bolt insertion are facilitated. The device has the characteristics of small structural space, wide pipe diameter range and convenience in operation.

An intelligent cable hoisting system without a tower-rock anchor system comprises a cable system, an anchorage, a winch and an intelligent monitoring command center. The cable system is connected with the anchorage through the sports car, and it is ensured that rope force is effectively transmitted to the anchorage in the cable hoisting process. The anchor is designed to be of a pre-stressed anchor structure, the pre-stressed anchor is directly anchored on a mountain, damage to the ecological environment is reduced, the green, low-carbon and environment-friendly construction concept is positively responded, and in addition, the pre-stressed anchor has high bearing capacity, can adapt to tension of different bearing cables, and is high in safety coefficient and small in risk; and the winch is connected with the hoisting cable and the traction cable of the cable system, so that the hoisting frame body can be rapidly and stably lifted and moved, and the working efficiency is improved.

The invention provides a swing type hydraulic actuator, relates to the field of swing hydraulic cylinders, and aims to solve the problem that a sealing structure of an existing swing hydraulic cylinder is poor in sealing performance and durability. Wedge-shaped surfaces of the end face sealing ring and the axial combined sealing ring are used for performing preliminary pre-tightening on the two kinds of sealing; meanwhile, the annular tensioning oil cavity is formed in the end cover, the pressure of the annular tensioning oil cavity is adjusted according to the working environment requirement, the end cover deforms to act on the end face sealing ring and the axial combined sealing ring, secondary pre-tensioning is provided for the end face sealing ring and the axial combined sealing ring, and the environmental adaptability of the blade type swing oil cylinder is improved.

The invention relates to a single-pair clamp holder for a drilling machine, and belongs to the technical field of drilling machines. Comprising a hollow shell, two slips in pairs and an oil cylinder used for enabling the slips to move. The two slips are respectively a slip I and a slip II; a counter-pulling screw rod and a counter-pulling plate are also arranged; the two ends of the counter-pulling screw rod are fixedly connected with the counter-pulling plate and the second slip correspondingly, the first slip is located between the counter-pulling plate and the second slip, and the counter-pulling screw rod penetrates through the first slip; the oil cylinder is located between the reverse pulling plate and the first slip and can drive the first slip and the second slip to be close to or away from each other. According to the clamping device, driving of the two slips can be achieved through one oil cylinder, the structural space is saved, and the production cost is reduced. The drilling rod clamping device is reasonable in structure, convenient to control and capable of adaptively changing along with the position of a drilling rod, and safe and stable clamping of the drilling rod is guaranteed.

The invention relates to a device for cutting plastic profiles extruded along an extrusion axis (7), at least comprising: a tool (10) arranged on a tool holder (14); a pivot arm (9) by means of which the tool holder (14) can be moved together with the tool (10) towards and away from the extrusion axis (7); means (19) for pivoting said pivoting arm (9). According to the invention, the tool (10) is connected to a tool holder (14) and can be oriented in a plane at right angles to the extrusion axis (7) via an adjustment (15), and / or the tool (10) is connected to the tool holder (14) and a pivot arm (9), the pivot arm (9) being arranged on a device (19) for pivoting, the device (19) for pivoting being an electromechanical drive, and the device (19) for pivoting being arranged on the pivot arm (9). The electromechanical drive comprises at least one cycloidal gear (11) which is directly connected to the actuator (21). The invention also includes a method for cutting.

The invention discloses a superconducting magnet device and a vector magnetic field loading method. The method comprises the following steps: step 1, determining the size and the direction of a vector magnetic field; the superconducting magnet device and the vector magnetic field loading method are provided. Under the same working magnetic field, the structure space is smaller, the magnetic field utilization rate is higher, the manufacturing cost can be remarkably reduced, meanwhile, the uniformity of the magnetic fields provided by the X coil and the Y coil is higher, meanwhile, the ultra-low vibration performance is achieved under the high magnetic field, the optical or magnetic measurement requirement with the very high vibration requirement can be met, and the application prospect is wide. The superconducting coil is cooled by using the flexible cold conduction belt, the vibration of the superconducting coil can be effectively reduced, the vibration stability of a magnetic field is improved, 0.5-1% of current is overshot when the magnetic field is loaded, and then the current is adjusted to be reduced to a target magnetic field, so that the magnetic field can be quickly stabilized, and the drift effect of the magnetic field is reduced.

The invention relates to the technical field of pipeline cutting, in particular to intelligent cutting equipment for building heating and ventilation pipelines. Comprising a base, a cutting mechanism, a moving mechanism and an inner supporting mechanism; the cutting mechanism comprises a fixing frame, a hydraulic cylinder, a mounting seat, a cutting knife and a cutting motor; the moving mechanism is used for driving the fixing frame to move by a preset distance so as to complete cutting operation of building heating and ventilation pipelines with different lengths. The inner supporting mechanism comprises a supporting frame, a base plate, a connecting pipe, a rotating motor, a rotating shaft and an inner supporting piece. The rotary motor is arranged on the substrate, and an output shaft is connected with the rotary shaft; the inner supporting piece is used for conducting inner supporting and jacking operation on the building heating and ventilation pipeline, and the preset first inner supporting point and the preset second inner supporting point are symmetrically distributed and located on the two sides of the cutting knife. The device is reasonable in structural design and high in cost performance, the heating and ventilation pipeline is conveniently driven to rotate to complete cutting while stable and symmetrical inner supports are formed on the inner wall of the heating and ventilation pipeline, the problem of quality deviation caused by notch deformation is avoided, and the device is more practical.

The embodiment of the invention provides a printed circuit board and electronic equipment. The printed circuit board comprises a board body and an antenna feed source, the plate body comprises a copper laying area and a clearance area, the clearance area is a hollow area in the copper laying area, and the copper laying area comprises a first area and a second area which are divided by the clearance area; the first region and the second region are connected or separated; the antenna feed source passes through the clearance area, one end is connected with the first area, and the other end is connected with the second area to form an antenna feed point. According to the embodiment of the invention, the copper laying area is divided into the first area and the second area through the clearance area, so that the first area and the second area become radiation oscillators of the antenna, the antenna body and the plate body are combined into a whole, an independent antenna is omitted, and the structural space of a product is reduced.

The invention relates to a drive-by-wire control system (2) of a motor vehicle for controlling a main function of the motor vehicle and an auxiliary function of the motor vehicle, which auxiliary function is graded to be lower than the main function by a safety criterion to be met, the main function being implemented by means of a main function component (4) of the motor vehicle. The auxiliary function can be carried out by means of an auxiliary functional component (6) of the motor vehicle, which is spatially separate from the main functional component (4), and at least one sensor (8, 9) of the auxiliary functional component (6) is functionally assigned to the main function, characterized in that the sensor (8, 9) is arranged in the auxiliary functional component (6). The at least one sensor (8, 9) of the auxiliary functional component (6), which is associated with the main function, is only in an energy supply connection to the main functional component (4) on one hand in order to supply operating energy to the sensor (8, 9) and on the other hand is in a signal exchange connection.

The invention belongs to the technical field of underwater robots, and particularly relates to a micro optical fiber active compensation device for an autonomous remote control underwater robot. Comprising a box body and a control box, a fiber winding assembly, a damping assembly and a tension detection assembly which are arranged in the box body, the fiber winding assembly is used for winding a micro optical fiber, the micro optical fiber penetrates out of the box body after sequentially passing through the damping assembly and the tension detection assembly, and the damping assembly is used for providing damping for the micro optical fiber. The tension detection assembly is used for detecting the tension of the micro optical fiber and outputting tension information, the control box receives the tension information output by the tension detection assembly and outputs a control instruction to the fiber winding assembly and the damping assembly according to the tension information, and the fiber winding assembly performs actions of winding and unwinding the micro optical fiber according to the control instruction. The damping assembly changes damping according to the control instruction for tension compensation. According to the invention, real-time active compensation and tension control of the optical fiber in water are realized, optical fiber consumption can be saved, and intelligence of an optical fiber management system is enhanced.

The invention provides a detachable turnover I-shaped steel beam lower hanging structure unsupported construction connecting device and an installation method, and belongs to the technical field of building construction.The detachable turnover I-shaped steel beam lower hanging structure unsupported construction connecting device comprises a connecting system, a hanging system and an adjusting system; the hanging system and the adjusting system are connected with the connecting system in an assembled mode, the hanging system is used for fixedly installing a concrete slab main keel, and the adjusting system is used for adjusting the elevation of the concrete main keel and plays a role in reverse hanging and supporting. The connecting system comprises an L-shaped steel plate, two special-shaped steel plates, four rectangular steel plates, two connecting screws and a plurality of nuts. The connecting system is used for being connected with an I-shaped steel beam and can bear construction loads together with the I-shaped steel beam. The hanging system comprises a hanging rod, a nut, a steel base plate and a U-shaped groove. The problem that a bearing frame for traditional concrete keel construction is high in building time and cost can be solved.

The present invention relates to a temporary support frame for installing an assembled lattice steel structure and a method of using the frame, including a base section, a standard section, an adjustment section inner section, an adjustment section outer section, an adjustment top support, and a jack for unloading; the base section includes a base section column limb, a base section tie bar, and a base section cross beam; the standard section includes a standard section column limb, a standard section tie bar, and a standard section cross beam; the adjustment section inner section includes an adjustment section inner section column limb, an adjustment section inner section tie bar, and an adjustment section inner section cross beam. Through the present invention, the deficiencies of the prior art and devices are overcome, construction space is saved, the erection period is short, and the reuse rate is high; the lattice-type assembly section is light in weight, high in bearing capacity, and convenient to hoist; each assembly section can be flexibly assembled according to actual needs, and is easy to install; through multiple height adjustment devices, the installation elevation of the steel structure is ensured, and the installation of complex steel structures with variable elevations can be met, and the unloading operation after the steel structure is installed is convenient.

The invention relates to a vacuum system in a pulse power device, and provides a magnetic insulation induced voltage superposition device with axial vacuum degree consistency in order to solve the problems that an existing vacuum system cannot reach a target vacuum degree and is poor in uniformity, the magnetic insulation induced voltage superposition device comprises a cantilever supporting section, a plurality of groups of induction cavities and an isolation extension section which are coaxially connected in sequence, the vacuum cavity assemblies and the vacuum pump assemblies are arranged between the connecting ends; the vacuum cavity assembly comprises a vacuum cavity and a connecting cylinder, and the connecting cylinder is used for connecting the vacuum cavity assembly to the connecting ends in an inserted mode. A plurality of interface flanges are arranged on the outer side circumferential surface of the vacuum cavity, and a plurality of through holes are formed in the outer side circumferential surface of the connecting cylinder in the radial direction; the vacuum pump assembly comprises a plurality of molecular pumps, a vortex dry pump, a pre-pumping valve and an isolating valve, the molecular pumps are connected with the vacuum cavity through interface flanges, one end of the vortex dry pump is connected with the vacuum cavity through the pre-pumping valve, the other end of the vortex dry pump is connected with the molecular pumps through the isolating pump, and the vortex dry pump is used for controlling the molecular pumps to perform high vacuum pumping treatment.

The invention belongs to the technical field of optical fibers, and particularly discloses an optical fiber connector and an inner core assembly thereof, the inner core assembly comprises an insertion core component, a supporting body and an elastic element, the insertion core component is used for penetrating through an optical cable, and the insertion core component is movably connected with the supporting body in a limiting mode so that the insertion core component can move relative to the supporting body in the axial direction and / or the circumferential direction; one end of the elastic element abuts against the insertion core component, and the other end of the elastic element abuts against the supporting body. According to the optical fiber connector, the insertion core component is movably connected with the supporting body in a limiting mode, the insertion core component can be prevented from excessively rotating to twist off an optical fiber, it can be guaranteed that the insertion core component is in a floating state during working, even if the tail of a jumper wire is stressed, stress deformation of the tail of the optical fiber connector is not transmitted to the insertion core component, and the service life of the optical fiber connector is prolonged. Therefore, the butt joint state of the insertion core optical fiber is not interfered, high-precision insertion loss control is always ensured, and low-loss insertion loss control is always ensured while better tensile property is obtained.

The invention provides a stepping motor control method, device and equipment for a coating die head, and relates to the technical field of coating control, and the method comprises the steps: obtaining a first coating control parameter sent by an upper computer, a state parameter of a stepping motor at the current moment, and a two-phase current of the stepping motor in a two-phase static coordinate system; determining a control reference amount based on a deviation between the state parameter and the configured position control amount; according to the state parameters and the control reference quantity, converting the two-phase current under the two-phase static coordinate system to obtain two-phase voltage of the stepping motor under the two-phase static coordinate system; generating a second coating control parameter according to the two-phase voltage of the stepping motor under the two-phase static coordinate system; and based on the first coating control parameter and the second coating control parameter, a stepping motor of the coating die head is controlled to move at the next moment. According to the application, the upper computer is used for simultaneously controlling the stepping motor control system of the plurality of coating die heads through the CAN bus, so that the space utilization rate and the control precision of the stepping motors of the coating die heads are improved.

The utility model relates to the technical field of sanitary products, and provides a water pause swinging head water outlet device which comprises a water outlet head, a handle and a water pause structure, the water outlet head is provided with a water outlet channel communicated with a water outlet nozzle, and the handle is provided with a water inlet channel, the water outlet head is configured to be rotatably connected with the handle through the water pause structure, the water pause structure comprises a water passing groove and a key, and the key is pressed in an operable mode so that the water passing groove can be communicated with the water inlet channel and / or the water outlet channel in an aligned mode or separated from the water inlet channel and / or the water outlet channel in a staggered mode. Therefore, connection and disconnection of the water inlet channel and the water outlet channel are controlled. The problem that an existing shower head is inconvenient to use and difficult to adapt to different use scenes is solved.

The invention relates to a separating screen for rice cultivation, which comprises a machine body upper part and a machine body lower part, the machine body upper part and the machine body lower part are detachably and fixedly connected, an inner cavity for screening rice is formed between the machine body upper part and the machine body lower part, and the separating screen further comprises a deformation screen body part and two linear driving sources, the deformation screen body part is installed in an inner cavity formed between the machine body upper part and the machine body lower part, and the two linear driving sources are both installed at the bottom of the machine body lower part. Through the arrangement of the deformable screen body part, the screen cloth can be adjusted according to requirements when the separating screen for rice cultivation is used, so that rice with different particle sizes is screened, the situation that a traditional separating screen adopts multi-stage screen cloth to screen rice with different particle sizes is avoided, the overall structure space of the device can be reduced, and the size of the device is reduced; and the device can have a wide screening application range, the screen does not need to be replaced, and the convenience of screening operation for rice cultivation is improved.

The present invention relates to a motor vehicle (10) and a power battery device (12), the power battery device having at least one battery module (16) and a battery housing (20), the at least one battery module having at least one battery cell (18), the at least one battery module (16) being arranged in the battery housing, wherein the at least one battery cell (18) has a diffusion opening (26) for discharging diffusion gas from the battery cell (18), wherein at least one protective element (28) is provided in a battery housing wall of the battery housing (20), the at least one protective element being constructed to destabilize under the action of diffusion gas and to provide an opening through the battery housing wall for discharging diffusion gas from the power battery device (12).

The utility model discloses a filler stirring device for constructional engineering. The filler stirring device comprises a rack, a stirring bin, a stirring assembly, a storage bin and a discharging assembly, the stirring bin is erected above the rack, an opening is formed in the upper portion of the stirring bin, and the stirring assembly is arranged in the stirring bin and used for stirring concrete; the storage bin is arranged on the rack and is positioned above the stirring bin; the stirring bin is provided with a blanking port, and the blanking port is provided with an on-off valve assembly; concrete in the stirring bin can fall down and be collected in the storage bin; the unloading assembly comprises an unloading channel and an unloading screw rod; and the discharging channel is obliquely arranged. According to the concrete mixing and supplying device, the concrete mixing and supplying efficiency is remarkably improved through the split type structural design of the mixing bin and the storage bin and the cooperative operation of the discharging assembly.

The invention relates to a suction device for sucking away brake dust particles of a pneumatic brake system of a commercial vehicle, a brake system, and a commercial vehicle, the brake system having a brake disc rotatable in a rotational direction, a brake caliper, and a carrier carrying the brake caliper, the suction device comprising a base body having a suction line arranged therein; the base body is provided with a connecting opening, and the connecting opening is used for connecting the base body with a negative pressure interface used for loading negative pressure to the suction line; the base body has a branch and a suction opening arrangement, the suction opening arrangement being fluidically connected to the connection opening via a suction line; the suction opening arrangement is configured to enclose the brake disc; the suction device is arranged between the brake caliper and the carrier in the rotational direction.

Proposed is an intermediate lever for a variable-lift valve train of an internal combustion engine, the upper portion of which has a pivot bearing, and the longitudinal middle section of which carries a rolling mechanism, which longitudinal middle section transitions on the underside into a base, which widens the intermediate lever at least on one side in the pivot direction thereof with a base bulge, and which has on the underside thereof a slide channel track for contact with a valve opener, wherein the intermediate lever has at the base bulge an abutment for the leg of a cam return spring, wherein the intermediate lever exists in the upper portion and the longitudinal middle section as a continuous flat, one-piece plate, wherein the pivot bearing is a bearing hole in the upper portion, wherein as a rolling mechanism two discs are provided in the longitudinal middle section, which discs each extend on a common shaft extending through it at the outer wall of the longitudinal middle section, and wherein the base is joined to the transversely thickened portion of the longitudinal middle section one piece below the discs.

The invention provides an in-hole back-dragging assembly method for a rear matched trolley of a super-large-diameter shield tunnel. The in-hole back-dragging assembly method can solve the problems that in the prior art, in the back-dragging assembly process, materials are wasted, the occupied construction space is large, and the construction efficiency is low. Through the modular design and the reusable movable track panel track, the laying of rails and the use of other consumable materials are greatly reduced, meanwhile, the utilization of the construction space is optimized, the splicing efficiency of the shield tunneling machine is remarkably improved, and the movable track panel track comprises a back-dragging translation trolley and the movable track panel track; the back-dragging translation trolley comprises a square trolley body, two rows of walking steel wheels are arranged on the left side and the right side of the bottom of the trolley body, and square steel guide rails are arranged on the left side and the right side of the top of the trolley body. The movable track panel track is formed by splicing a plurality of movable track panel units, and auxiliary guide rails matched with the walking steel wheels are arranged on the left sides and the right sides of the tops of the movable track panel units.

The invention discloses an air conditioner condensate water treatment device which comprises a condensate water tank and a water outlet formed in one end of the condensate water tank, a control valve is arranged on the water outlet, a water inlet assembly is arranged on the control valve, a filter and a sterilizer are arranged in the water inlet assembly, and an atomization assembly is arranged at one end of the water inlet assembly. Condensate water in the condensate water tank enters the water inlet assembly through the water outlet and the control valve, is filtered by the filter and sterilized by the sterilizer and then enters the atomization assembly, and the atomization assembly atomizes water in the atomization assembly and discharges the atomized water into air. An adjustable mist outlet is formed in the atomization assembly and comprises a mist outlet hose and an exhaust fan arranged in the mist outlet hose, the mist outlet angle is adjusted through the mist outlet hose, and the mist outlet amount is adjusted through the exhaust fan. According to the device, air humidification can be conducted through air conditioner condensate water, the air quality is improved, the structural space occupied by the drainage pipeline is reduced, the building cost is saved, and the applicability is high.

The invention provides an integrated sealed high-pressure oxygen storage and supply system which is characterized in that a cable penetrating pipe comprises a pipe part and a cap part, the pipe part penetrates through a composite gas cylinder and is tightly connected with the inner peripheries of a head-end cylinder nozzle and a tail-end cylinder nozzle of the composite gas cylinder in an abutting mode through a sealing piece, a step table is constructed on the inner side of the tail-end cylinder nozzle of the composite gas cylinder, and the cap part is tightly abutted against the step table under the action of a locking piece; on the inner side of a head end bottle mouth of the composite gas cylinder, a plurality of flow guide pipes are uniformly arranged around a cable penetrating pipe in the axial direction of the composite gas cylinder and are connected with an annular flow channel on the head end bottle mouth, and the annular flow channel is further connected with an air inlet and outlet pipe; through high integration design, the system can be used as a functional component to provide a high-pressure gas source storage and supply function for a whole underwater device power system, and can also be used as a cabin section structure, so that the structural space is greatly saved.

The invention relates to a high-pressure cleaning appliance, comprising: a high-pressure pump (10), by means of which a cleaning liquid in the high-pressure cleaning appliance (1) can be pressurized; a hose reel (20) which is mounted so as to be rotatable about a rotational axis (50); a reel hose (21) that can be wound onto and unwound from the hose reel (20); and a housing (2). The high-pressure pump (10) is arranged in the housing (2) and comprises at least one piston (11) which can be moved back and forth in a direction of movement (49) in order to generate pressure on the cleaning liquid. The high-pressure pump (10) has a central axis (48) extending in the direction of movement (49) of the at least one piston (11). During operation of the high-pressure cleaning appliance (1), cleaning liquid can be fed to the reel hose (21) by means of the high-pressure pump (10). The rotational axis (50) extends transversely to the direction of movement (49) of the at least one piston (11). The rotational axis (50) intersects the high-pressure pump (10).

The application provides a water plant channel system, which comprises a support module and a channel module; the support module comprises: a plurality of parallel and spaced main beams; a plurality of columns, the columns and the main beams one-to-one constitute a single-frame; a secondary beam, which is horizontally and longitudinally arranged at an outwardly extending end of the main beam; a cantilever; and the channel module is a light thin-wall channel, which is detachably installed on the main beam, the secondary beam and the cantilever and located in the single-frame. The support module retains the main structure of bearing and anti-seismic, removes the wallboard, reduces the dead weight, and can achieve a better anti-seismic target; the light thin-wall channel is detachably installed on the support module, the force transmission path is clear, the deformation and displacement of the channel at the end are enlarged, the pressure relief plate device is excited to drain water, and the'solid-liquid' coupling reaction of the channel during the earthquake is weakened. The formed channel system has good structure and anti-seismic performance, is beneficial to achieving the anti-seismic target, is convenient to install and remove, has low cost, has good equipment and instrument compatibility, and has small construction space limitation.

The application discloses a waterproof door assembly and an electronic device, and belongs to the technical field of electronic device design. The waterproof door assembly comprises a cover plate, an assembling shaft and a fixing member. The assembling shaft is connected to the cover plate, so that the cover plate can rotate relative to the assembling shaft. The assembling shaft comprises an axial groove, a buckle structure and a fixing structure. The axial groove is connected to the cover plate and comprises a first end portion and a second end portion. The buckle structure is connected to one side of the axial groove relative to the cover plate and extends to the first end portion of the axial groove. The buckle structure can be buckled to the shell. The fixing structure is connected to one side of the axial groove relative to the cover plate and is close to the second end portion of the axial groove. The fixing member penetrates through the fixing structure and is fixed to the shell. Each waterproof door assembly can be independently installed on the shell, so that the waterproof door assembly can be independently maintained or replaced.

The invention relates to a lighting device (2) for a motor vehicle (1), comprising at least one light source (5) and a transparent sheet (7) through which light (8) generated by means of the at least one light source (5) passes, on which sheet a planar layer (17) having a plurality of interruptions (19) is arranged, the scattering of the light (8) generated by means of the at least one light source (5) by means of the layer (17) is stronger than the scattering of the light (8) generated by means of the at least one light source (5) by means of the sheet (7).

The invention relates to an electric machine (24) having at least one disc-shaped rotor (58, 60) which is accommodated on a shaft (52). At least one disc-shaped rotor (58, 60) is provided with a brake disc (54) of an eddy current brake (22) on the side. The invention further relates to the use of an electric machine (24) having at least one integrated eddy current brake (22) as a central brake for a front axle (12) and / or a rear axle (38) of an electrically driven vehicle (10).

This invention belongs to the field of flow battery energy storage technology, and relates to a negative electrode electrolyte for alkaline all-iron flow batteries and its preparation method. The negative electrode electrolyte is prepared from iron salts, a complexing agent, a promoting component, an alkaline component, an auxiliary electrolyte, and water. The total iron concentration is 0.1–2.0 mol / L, the molar ratio of the complexing agent to the iron salt is 1.5–4, the molar ratio of the promoting component to Fe is 0.05–1.0, the alkaline component concentration is 2.0–6.0 mol / L, and the auxiliary electrolyte concentration is 0–2.0 mol / L. The negative electrode electrolyte of this invention for alkaline all-iron flow batteries has a high total iron concentration, which not only avoids the precipitation of elemental iron during charging and discharging, but also effectively prevents the formation of ferric hydroxide precipitate, improves the stability of iron ions, and greatly extends the cycle life of the negative electrode electrolyte. It can be widely used in aqueous alkaline all-iron flow batteries.