45results about How to "Guaranteed neutrality" patented technology

The invention discloses a treatment process for acid mine wastewater and a combined reactor thereof, and relates to the technical field of water treatment. The method specifically comprises the following steps: oxidizing the mine acid wastewater through an aerobic reactor; adjusting the pH value to 2.8 by using KOH in a first neutralization reactor, and further adjusting the pH value to 4.5 by using KOH in a second neutralization reactor; the wastewater enters a pretreatment reactor, H2S is introduced for treatment, and the treated wastewater continuously enters two anaerobic reactors for reaction. According to the method, an aerobic-anaerobic combined reactor containing iron oxidizing bacteria and sulfate reducing bacteria is adopted for treating the mine acid wastewater, on one hand, AMD can be effectively treated, on the other hand, heavy metal can be selectively precipitated, and Schwertmannite and metal sulfide with utilization value are obtained. The method not only realizes the economic value of effectively utilizing the wastewater, but also realizes the target of environmental treatment, and has better economic value.

The invention discloses a stop valve for fluid control and a working method of the stop valve, solves the problem that in the prior art, due to the fact that a valve rod and a valve element are not aligned, the opening and closing function is prone to failure, and has the beneficial effects that the stop valve for fluid control comprises a valve body, and the valve body forms a fluid opening and closing channel; the valve body is connected with the middle valve cover in a sealed mode, the middle valve cover is connected with the upper valve cover in a sealed mode, a driving piece is arranged at the position of the upper valve cover, the driving piece can rotate relative to the upper valve cover, the driving piece is connected with the valve rod through a thread structure, and the valve rod sequentially penetrates through the upper valve cover, the middle valve cover and the valve body and then is connected with the valve element. One section of the valve rod is in sliding connection with the upper valve deck or the middle valve deck to limit rotation of the valve rod along with the driving piece, so that the valve rod drives the valve element to move relative to the valve body in the axis direction of the valve body, and opening or closing of the opening and closing channel is achieved.

The utility model relates to the technical field of valves, and discloses a check valve, which comprises a valve body, a valve core, a valve core, a valve core and a valve core, the aperture of the first through hole is larger than that of the second through hole, and a step surface is formed at the joint of the first through hole and the second through hole; the support is arranged in the first through hole and is provided with a first mounting through hole which is communicated with the first through hole and is coaxial with the first through hole; the valve clack is arranged in the first through hole and comprises a valve clack body and a valve clack handle arranged on one side of the valve clack body, and the valve clack body is in lap joint with the step surface and is suitable for sealing the second through hole; the valve clack handle is movably arranged in the first mounting through hole in a penetrating manner; and the elastic piece is arranged between the valve clack body and the support. According to the check valve, the elastic piece is arranged between the valve clack body and the support, the opening pressure of the check valve can be dynamically adjusted through the elastic performance of the elastic piece, and therefore the check valve can better adapt to fluid pressure and flow changes under different working conditions, and the performance of a pipeline system is optimized.

The invention discloses a connector suitable for steel bar butt joint of an assembly type reinforced concrete member, and relates to the field of steel bar butt joint of assembly type concrete construction. The stepped sleeve internally provided with the upper open threaded blind cavity and the lower open threaded blind cavity which are coaxially arranged is designed, and the stepped sleeve is matched with the upper reinforcing steel bar nut and the sleeve limiting ring, so that integrated smooth butt joint of adjacent reinforced concrete members in a fabricated building is achieved; and on the basis that the butt joint radial deviation of the butt joint steel bars is easy to realize in the actual construction process, the butt joint centering of the steel bars can be ensured, the butt joint reliability and durability of the steel bars are greatly improved, the construction quality and anti-seismic property of the fabricated concrete building are improved, and the construction efficiency is greatly improved. Meanwhile, reliable and efficient butt joint of a plurality of steel bars on the sections of adjacent concrete members can be smoothly achieved through matched use of multiple sets of steel bars, and the beneficial effects of being high in efficiency, high in reliability and stability, good in durability, excellent in shock resistance, easy to operate and capable of saving cost are achieved.

The multifunctional combined chopping board comprises an upper panel and a lower panel, the upper panel is provided with a plurality of through holes, the lower panel is provided with a plurality of protruding columns extending upwards, and the upper panel and the lower panel are detachably connected so that the multifunctional combined chopping board can be in a split state and a combined state; in the split state, the upper surface and / or the lower surface of the upper panel form a food bearing surface; in the combined state, the convex columns penetrate through the through holes and protrude out of the upper panel, and the lower surface of the lower panel forms a food bearing surface; the combined chopping board further comprises a limiting piece, and in the combined state, the limiting piece is connected with the upper panel and the lower panel so as to limit the upper panel to be separated from the lower panel. When the combined chopping board is turned over in the combined state, the limiting piece can limit relative movement between the upper panel and the lower panel, the stability of the combined state is ensured, a user can conveniently, rapidly and smoothly turn over the combined chopping board, and the user experience is improved.

The utility model discloses a top cover for an indoor unit of an air conditioner, and belongs to the technical field of air conditioning equipment. According to the utility model, the top cover main body which can be disassembled from the rear box body and can be butted with the front panel is arranged; the top cover main body comprises a lower cover body and an upper cover body which are fixedly connected with the rear box body; a first coupling part is formed on one side of the upper cover body, and a lock catch capable of being locked with or separated from the lower cover body is mounted on the other side of the upper cover body; in a locking state, the first coupling part can be coupled with a second coupling part formed on the lower cover body, the top cover main body adopts a split structure, and after the top cover main body and the rear box body are assembled, the upper cover body can be quickly disassembled from the lower cover body by utilizing the lock catch, so that the purpose of quick disassembly is realized, and convenience is provided for subsequent maintenance and repair.

The stepped reamer comprises a reamer body and an extending section integrally formed and connected to one end of the reamer body, a reamer ridge is machined on the circumferential face of the reamer body, and a first stepped blade, a second stepped blade and a tail blade are sequentially machined on the reamer ridge in the direction from the end, away from the extending section, of the reamer ridge to the extending section. And the diameters of the first stepped blade, the second stepped blade and the tail blade are different. In the stepped hole machining process, reamers of different models do not need to be replaced, the stepped hole can be machined at a time, and meanwhile the advantages of guaranteeing the centering performance of the stepped hole and guaranteeing the working efficiency are achieved.

The invention belongs to the technical field of control assembly assembling, and particularly relates to a control assembly assembling device and method. Comprising an assembling platform, control rod supporting discs, a supporting disc connecting shaft, a punching guide disc, a connecting handle positioning tool and a punching device, the multiple control rod supporting discs and the punching guide disc are installed on the assembling platform, and the supporting disc connecting shaft penetrates through the control rod supporting discs and the punching guide disc; the connecting handle positioning tool is installed on the outer side of the punching guide disc on the assembling platform, and the punching device is arranged on the side of the assembling platform. The device has the beneficial effects that the square connecting shaft is connected with the control rod rotary supporting disc, so that the consequences of torsion of the control rod and the like caused by asynchronous rotation of the multiple layers of control rod supporting discs due to slipping are avoided.

This invention relates to a control method for automatically leveling the pinch roll to ensure the coil shape. The steps are as follows: pressing the pinch roll of the winding machine against the coil, recording the pressure on both sides of the pinch roll and the roll gap value, and writing them into two preset stiffness arrays; applying a preset pressure value G to one side of the pinch roll. 设 The corresponding roll gap value Gm is found based on the stiffness array of the same side. Based on the found roll gap value Gm and its corresponding stiffness array, the theoretical pressure value Fb on the other side of the pinch roll is determined. A safety limit is applied to the theoretical pressure value Fb to determine the final execution pressure value G on the other side. 执 The set pressure value G is applied to both sides of the pinch roller. 设 Execution pressure value G 执 This invention ensures that the roll gap value remains consistent on both sides under different pressures. It maintains consistent roll gaps on both sides, avoiding roll defects caused by pressure variations, significantly reducing roll rework rates, preventing losses during lifting due to misalignment, and minimizing quality losses.

The utility model discloses a built-in valve type magnetorheological automobile shock absorber which is mainly composed of a support, an end cover, a spring, a piston rod, a damper cylinder barrel, a piston sleeve, a piston baffle, a reel, a magnet exciting coil and the like. According to the shock absorber, the spring and the magnetorheological damper are connected in parallel, and the functions of relieving road impact and dissipating vibration energy can be achieved at the same time. The valve type piston composed of the piston baffle, the piston sleeve and the winding frame is attached to the inner surface of the circumference of the damper cylinder barrel, the piston rod can have good centering performance, and the working stability of the shock absorber is guaranteed. Through reasonable arrangement of magnetic conduction and magnetic isolation materials, magnetic lines of force of the shock absorber are only generated at the piston part, magnetic leakage is effectively reduced, and the utilization rate of a magnetic field is improved. The shock absorber is simple in structure, small in size, high in stability and capable of effectively improving the shock absorption performance of an automobile.

The application discloses a crankshaft transmission mechanism for an engine, which comprises a crankshaft and a connecting rod, a crank arm and a balance weight are integrally formed and are connected through a smooth transition of a concave arc surface; a first boss in a ring shape is arranged on the outer side surface of the crank arm near the two ends of the crankshaft, and the radial outer contour of the first boss extends to be tangent to the concave arc surface; the end surface of the one end of the crank arm where a connecting rod journal is located is a circular arc surface, is concentric with the connecting rod journal, and has a diameter smaller than the outer diameter of the axial end surface of the big end of the connecting rod. The radial size of the first boss is enlarged to increase the contact area with the inner wall of the shell to reduce the surface pressure, meanwhile, the big end of the connecting rod is exposed to the axial end surface to form a lubrication exposed area through the circular arc surface, so that forced lubrication and cooling are realized; and through the structure that the end surface of the driving gear is integrated into a contact surface, the semi-ring second boss surface is axially positioned, the connecting rod journal is thickened, and the eccentric mass block of the balance shaft is recessed to avoid, the wear resistance, the lubrication and heat dissipation performance, the structural strength and the running stability of the crankshaft transmission mechanism are simultaneously improved under the compact layout.

A loading device for a bearing ultralow temperature experiment comprises a main shaft arranged in a lining in a penetrating mode, the main shaft is sleeved with an experiment bearing and a spacer bush, a shaft end gland is installed at the end of the main shaft, the lining is arranged on the experiment bearing in a sleeving mode, a loading cylinder is arranged on one side of the shaft end gland, and an inner guide seat is connected to the lining. The loading cylinder is inserted into an inner hole of the lining and an inner hole of the inner guide seat at the same time, the lining is further connected with a gland, the gland is connected with a liquid inlet device and an outer guide seat, an outer piston is inserted into the gland, and an inner piston is inserted into an inner hole of the outer guide seat. A plurality of inner guide balls are arranged between a loading cylinder and an inner guide seat, and a plurality of outer guide balls are arranged between an inner piston and an outer guide seat, so that the accuracy of applying an axial load by the test device can be greatly improved, and the problem that the test shaft system cannot keep good centering with the loading device due to low-temperature sedimentation is avoided; extra upsetting moment is prevented from being generated on the loading body, and the accuracy of the bearing ultralow-temperature experiment is improved.

The invention provides a vertical suspended sand feeding device and method for an electroplated diamond wire, the vertical suspended sand feeding device comprises a sand feeding cylinder, a sand washing part, a plugging part, a plugging base and a sand washing bottom plug, a wire passing hole is formed in the middle of the sand washing part, a mounting groove is formed in the bottom of the sand washing part, and the mounting groove communicates with the wire passing hole; the plugging piece is arranged between the plugging base and the mounting groove, the sand washing bottom plug is fixed below the sand washing piece, and the plugging piece is movably limited in a gap formed between the plugging base and the groove bottom of the mounting groove; an inclined flow guide liquid inlet hole is formed in the sand washing part and is communicated with the wire passing hole; when the electroplated diamond wire is pulled from bottom to top, friction force generated between the electroplated diamond wire and the plugging piece pulls the plugging piece and seals the lower portion of the wire passing hole, plating liquid entering from the inclined flow guide liquid inlet hole obliquely impacts the plugging piece, the plugging piece rotates in the containing groove of the plugging base, and carborundum is made to suspend; according to the invention, stable sand feeding is facilitated, and the plating effect of the electroplated diamond wire is improved.

This invention relates to the field of tarpaulin splicing technology, specifically to a tarpaulin coating post-splicing positioning and connection device, comprising a support structure, two axially parallel material rollers mounted above the support structure, and an adjusting frame assembly between the two material rollers for adjusting their axial displacement. The adjusting frame assembly has a positioning clamping structure for positioning and clamping the material rollers. The support structure has a support wheel assembly for rolling support of the adjusting frame assembly. The adjusting frame assembly has a side detection assembly for positioning and detecting the side of the tarpaulin. The axial distance between the two material rollers can be adjusted through the adjusting frame assembly, thereby adapting to different splicing width requirements of the tarpaulin. The fifth electric telescopic rod of the hot pressing assembly can drive the wheel platform to move, realizing the adjustment of the distance between the fixed electrode plate and the moving electrode wheel, which can adapt to the high-frequency hot pressing requirements of tarpaulins with different coating thicknesses, greatly improving the applicability of the equipment.

The invention discloses a high-temperature-resistant multi-phase flow screw drill which is applied to the technical field of multi-phase flow screw drills and is characterized in that a centering mechanism is arranged, and the surface of a motor assembly is sleeved with the centering mechanism, so that oil liquid can be injected into the centering mechanism through external equipment in the tripping process of the screw drill; under the action of pressure, the connecting ring can move and promote the flexible metal sheet to bend and expand, so that the screw drilling tool can adapt to well walls with different shapes, the centering property of the screw drilling tool can be always kept, the drilling tool jamming phenomenon is reduced, and when the well walls locally protrude or sink, the drilling tool cannot be damaged. The expansion degree of one or more flexible metal sheets can be adjusted according to the actual contact condition through the limiting piece, so that the effect of finely adjusting the expansion degree of the flexible metal sheets is achieved, good contact with the well wall is kept all the time, and the centering performance of the screw drill is guaranteed.

The application discloses an out-of-cabin mounted cabin safety valve with a modular excess pressure mechanism and a method. The cabin safety valve comprises a shell (1), a diaphragm (2) arranged in the inner cavity of the shell (1), and a knife-edge valve (3) arranged on the bottom surface of the diaphragm (2). The upper surface of the diaphragm (2) and the shell (1) form a B cavity, the inner side of the knife-edge valve (3) and the shell (1) form an A cavity, and the outer side of the knife-edge valve (3), the bottom surface of the diaphragm (2) and the shell (1) form an atmosphere cavity (4) which is connected with the atmosphere. The A cavity and the B cavity are connected through a hollow valve rod (5). The B cavity is connected with an excess pressure mechanism. The cabin safety valve solves the problems of poor control precision, difficult product debugging and easy fluctuation of excess pressure value under high-altitude conditions.

The invention provides a numerical control pre-assembling machine for a ferrule joint, and relates to the technical field of industrial robots. The numerical control pre-assembling machine for the ferrule joint comprises a shell; the limiting block is arranged at the top of the shell; and the jacking mechanism comprises an upward jacking unit and a positioning seat, the positioning seat is limited in the limiting block, the upward jacking unit is arranged under the positioning seat, and the upward jacking unit can vertically move upwards in the direction of the positioning seat. When the device works, an operator places a steel pipe sleeved with a clamping sleeve and a nut at the top end of the jacking unit, after the device is started, the jacking unit vertically moves upwards, the steel pipe is pushed into the positioning base above, under the constraint of an inner cavity of the positioning base, the clamping sleeve is extruded to deform and evenly cut into the outer wall of the steel pipe, and preassembling is completed; and the centering property of the pre-assembling device and the pre-assembling device is ensured through the limiting block, so that manual wrench operation is replaced by controllable mechanical force, and the problems of non-uniform pressure and unstable quality of manual pre-assembling are fundamentally solved.

The present invention relates to a movable shaft head assembly, comprising a movable pressing sleeve and a movable shaft head, wherein the movable shaft head comprises a shaft head top, a shaft head middle and a shaft head lower part fixedly connected from top to bottom, a through hole is opened at the top of the movable pressing sleeve, and the shaft head top comprises a first cylindrical part, a frustum part and a second cylindrical part fixedly connected from top to bottom, the first cylindrical part, the frustum part and the second cylindrical part are concentrically arranged and the bottom surface area of ​​the second cylindrical part is larger than the bottom surface area of ​​the first cylindrical part, the upper surface diameter of the frustum part is the same as the bottom surface diameter of the first cylindrical part, the lower surface diameter of the frustum part is the same as the bottom surface diameter of the second cylindrical part, the first cylindrical part extends out of the through hole, a compression spring group is arranged between the middle part of the shaft head and the inner side of the top of the movable pressing sleeve, a hole elastic retaining ring is arranged at the bottom of the movable pressing sleeve, and the lower part of the shaft head extends out of the hole elastic retaining ring. The present invention effectively solves the eccentricity problem caused by the long-term use of the inner hole of the I-shaped wheel and the top clamping.

This invention discloses a clamping and flipping mechanism for a cold heading machine and its usage method, relating to the field of cold heading machine technology. It includes a housing and further comprises: a flipping assembly, including a rotating rod, which drives the workpiece to move and rotate when it needs to be flipped; a clamping assembly, including multiple symmetrically arranged arc-shaped plates, each with an elastic pad on its outer surface; when the workpiece diameter increases, the arc-shaped plates drive the elastic pads to move away from the workpiece end and reduce the clamping force on the workpiece; when the angle of the workpiece shifts after flipping, the arc-shaped plates rotate and, through the elastic pads, drive the workpiece to finely adjust its angle; when the workpiece is upset and deformed and its axis shifts, the arc-shaped plates rotate, causing the elastic pads to deform and support and lift the workpiece; through different actions of the telescopic rod and the adjusting rod, the clamping force is adaptively adjusted to match the workpiece diameter, correcting the flipping angle shift, switching the contact position to avoid the wear area of ​​the elastic pads, and leveling the tilted posture of the workpiece.

This utility model discloses a high-efficiency finger-jointed splicing device for solid wood small pieces, including a base and a splicing machine body. The splicing machine body is fixedly connected to the top of the base. It also includes: a support frame, which is fixedly connected to the base near the inlet of the splicing machine body, with multiple support rollers rotatably connected to the inner side of the support frame; and a support frame, which is fixedly connected to one side of the support frame, with an assembly frame vertically slidably connected to the inner side of the support frame. A hydraulic cylinder is fixedly connected to the top of the support frame, and the output end of the hydraulic cylinder is fixedly connected to the assembly frame. This utility model relates to the field of finger-jointed board processing technology. Through the structural cooperation of the hydraulic cylinder and the board feeding assembly, this utility model can effectively feed finger-jointed boards of different thicknesses by coordinating with the vertical adjustment of the assembly frame. Furthermore, because the finger-jointed boards are supported by the support rollers, they will not sink due to gravity or other reasons when not in transit, making the transmission of the finger-jointed boards more stable.

The utility model discloses a food processor in the field of kitchen appliance, including base, cup body, cutter head and comminuting knife, be equipped with motor in the base, the bottom of cup body is equipped with the upper coupling with the comminuting knife, the upper portion of base is equipped with the lower coupling with motor connection, the upper portion of base is equipped with the C -shaped limit ring in the radial outer side of lower coupling, cup body bottom is equipped with the limit recess, the bottom wall of cutter head is inclined to the opening side of limit ring downward, and the lower coupling is inclined to set up, be equipped with two first limit slot about the center axis symmetry of opening on limit ring, the bottom of cup body is equipped with the first limit rib of cooperation first limit slot, two first limit slot form the support surface that presents triangle in the bottom edge center point of the groove side wall of one side close to the opening and the center point of the top surface of lower coupling connection line, and support surface is inclined upward from the opening side to the opposite side of opening. Realized the stirring cup subassembly installation more stable, and the assembly precision is higher, and the effect that reduces transmission noise.

The utility model relates to the technical field of casting pump bodies, and discloses a metal casting pump body convenient to install, a connecting flange used for connection is fixedly installed on the outer side of the lower end of a pump body, an installing flange used for external connection is arranged at the lower end of the connecting flange, and an external pipe is fixedly installed at the lower end of the installing flange. Through cooperation of the ball groove in the lower end of the pump body and the hemispherical protruding block in the center of the fixing flange, preliminary accurate positioning of the pump body and the fixing flange is achieved, the installation error is reduced, the fixing flange is rotated to enable the trapezoidal grooves of the connecting flange and the fixing flange to be aligned, secondary positioning is conducted through the trapezoidal block, and the connecting stability is further enhanced; relative sliding in the connecting process is effectively prevented through the design of the trapezoidal block, the connecting firmness is ensured, the mounting holes are formed in the coinciding position of the connecting flange and the fixing flange, when the trapezoidal block is mounted in place, the mounting holes coincide naturally, additional adjustment is not needed, the mounting steps are simplified, and the mounting efficiency is improved.

The utility model provides a continuous rolling device for a copper pipe, and relates to the technical field of copper pipe production equipment. The rolling assembly comprises a supporting base fixed to the bottom plate, during working, the first transmission motor drives the first working roller to rotate, the first rotating block is driven to move through meshing of the first gear and the second gear, the third gear on the second rotating block is meshed with the second gear, and then the fourth gear is meshed with the third gear; a hydraulic push rod pushes a connecting block to slide in a supporting seat, drives a second working roller to adjust the position and forms an adjustable rolling gap with a first working roller; in the aspect of a positioning assembly, a first rotating seat on the supporting block drives a limiting sleeve to rotate, and a third rotating block slides in the limiting sleeve, so that a copper pipe is accurately positioned during rolling; continuous and stable feeding of the copper pipes is achieved, the rolling requirements of the copper pipes of different specifications can be met, and the production efficiency and the product size precision are improved.

The invention provides a polishing and etching method for a crystalline silicon solar cell. The polishing and etching method comprises the following steps: S1, polishing the back surface of a silicon wafer by using a mixed solution of KOH and an alkali polishing additive; s2, using a mixed solution of KOH and H2O2 to carry out a first round of post-cleaning on the silicon wafer; s3, performing a first round of hydrophobic pickling on the surface of the silicon wafer by using an HF solution; s4, using a mixed solution of KOH and H2O2 to carry out a second round of post-cleaning on the silicon wafer; s5, performing a second round of hydrophobic pickling on the surface of the silicon wafer by using an HF solution; and S6, drying the silicon wafer. According to the polishing and etching method of the crystalline silicon solar cell, the production efficiency is improved, the cost is reduced, and the environmental protection property is enhanced by optimizing the whole process steps.

The present invention relates to the technical field of universal parts of machines, and specifically to a slitting machine cone head, comprising a support shaft, a support ring and a plurality of support petals, wherein the support ring is rotatably sleeved on the support shaft, and a first driving mechanism is provided on the support shaft to drive the support ring to rotate relative to the support shaft. The support ring moves along the axial direction of the support shaft when rotating relative to the support shaft, and a plurality of support petals are evenly distributed along the circumference of the support shaft, and the outer periphery of each support petal is provided with a conical inclined surface for cooperating with the inner wall of a reel, and each support petal is connected to the support ring respectively. When the support ring rotates relative to the support shaft, it can drive each support petal to rotate along the circumference of the support shaft and move along the axial direction of the support shaft, so that each support petal is supported on one end of the reel respectively, and the support shaft is used for rotationally installing on the box body of the aluminum foil slitting machine, and when the support shaft rotates, it can drive the support ring and the support petal to rotate synchronously. The present invention can reduce the wear between the slitting machine cone head and the aluminum foil roll, and ensure the centering effect.

This utility model relates to the field of telescopic sleeves, specifically to a telescopic sleeve length adjustment device. It includes a telescopic sleeve assembly consisting of an outer tube and at least one inner tube. The innermost inner tube has no limiting hole, while at least the second innermost inner tube of the outer sleeve has at least one limiting hole. A control area is provided at the bottom of the inner tube closest to the limiting hole, nested within the sleeve with the limiting hole. A limiting component and a reversing component are provided within this area. The limiting component includes a limiting tongue, a limiting shaft, and a limiting torsion spring, causing the limiting tongue to tend to extend outwards and engage with the limiting hole. The reversing component includes a reversing spring, a reversing shaft, and a reversing torsion spring. The first end of the reversing spring acts on the tail of the limiting tongue to maintain or release the retracted state of the limiting tongue. This device achieves automated telescopic extension and retraction of multiple sleeve sections, solving the problems of low efficiency and inconvenience in existing multi-section telescopic sleeves that require individual operation of each section.

The utility model discloses a circuit breaker pressure spring pin pressing and riveting tool, and belongs to the technical field of electrical equipment manufacturing, the circuit breaker pressure spring pin pressing and riveting tool comprises a rack, a positioning assembly, a limiting assembly and a pressing and riveting assembly, the positioning assembly is installed on one side of the rack, and a positioning groove is formed in the positioning assembly; the limiting assembly is arranged opposite to the positioning assembly and used for clamping and driving the insulation pull rod to move in the direction close to or away from the rivet pressing assembly, and the rivet pressing assembly is used for riveting the edge of the pressure spring pin. The positioning assembly, the limiting assembly and the press riveting assembly are used in cooperation, automatic and accurate riveting of the pressure spring pin can be achieved, the riveting efficiency of the pressure spring pin is improved, the consistency of the knocking angle and position of the pressure spring pin is guaranteed, the situation that the center of the pressure spring pin is expanded due to stress, and use is affected is effectively avoided, and the production efficiency is improved. The action reliability and the operation stability of opening and closing of the circuit breaker are improved; according to the utility model, the qualified rate of opening and closing parameters of the circuit breaker can be effectively improved, batch reworking is reduced, and the production efficiency is improved.

The utility model relates to bearing processing technical field, concretely is a kind of split bearing processing fixture, including base, the top surface center of base is fixed with inner support positioning mandrel, the top surface of base is located and is equipped with a plurality of dog on the outside circumferential sliding of inner support positioning mandrel, the top surface of base is equipped with gland above, it is connected between the gland and base by a plurality of fastening bolt, the top surface of base is located and is equipped with wedge-shaped centring assembly symmetrically in the split seam both sides of split bearing, the bottom surface of gland is embedded with floating block by mounting groove, the floating block is connected with the mounting groove bottom surface of the gland by elastic element. This split bearing processing fixture can accurately position and firmly clamp two half bearing parts, ensure the centring and the degree of fit when secondary finishing, effectively improve the size and form tolerance qualified rate of bearing.

The invention relates to the technical field of plate spraying, and discloses a building plate spraying process which comprises the following steps: S1, polishing the surface of a building plate, removing impurities on the outer surface of the building plate, placing the pretreated building plate on a rack table of a spraying device, and spraying the building plate on the rack table; and the building boards are transversely conveyed through the conveying assembly on the rack table. According to the building board spraying process, the first conveying part is arranged for conveying the building board with the side edge sprayed, and the second conveying part is arranged for conveying the building board with the side edge sprayed, so that the spraying mechanism can conveniently spray the building board; and the building board with the side edge being sprayed can be dried through the first drying piece, the situation that when the building board is conveyed, coating which is thoroughly solidified on the building board adheres to the second conveying piece is avoided, and then the integrity of spraying machining of the building board is improved.