169results about How to "Change speed" patented technology

The invention relates to a low-noise water purifier. The water purifier includes a shell, an integrated waterway plate and booster pumps. The integrated waterway plate is fixed to the shell and is connected to water outlets of the booster pumps through pressure stabilizing tanks. The pressure stabilizing tanks are disposed between the booster pumps and the integrated waterway plate. The integrated waterway plate is connected to a plurality of evenly arranged connection tubes and is connected to filter core base assemblies through the connection tubes in a one-one correspondence manner. Beneficial effects of the water purifier are that 1) water knocking abnormal sound of the water purifier is reduced, thus improving user experience, 2) the structure is simple, water leakage is prevented and the production efficiency is high, and 3) replacement of a consumable of the product is simpler and more convenient.

The invention relates to the technical field of coolers, and provides a plate type cooler which comprises a box body and a spraying pipe and further comprises a plurality of heat exchange plates, the heat exchange plates are arranged in the box body at intervals and located below the spraying pipe, every two adjacent heat exchange plates are communicated, each heat exchange plate comprises a plate body, each plate body is provided with a cavity, and heat exchange water is introduced into each cavity; the multiple turbulent flow strips are arranged in the cavity at intervals, each turbulent flow strip is provided with a baffling part and a turbulent flow part, one end of each baffling part is arranged on the inner wall of the plate body, and each turbulent flow part is rotationally arranged at the other end of the corresponding baffling part; the control piece penetrates through one side of the plate body and extends out of the box body, the control piece is provided with a connecting end, the connecting end is arranged on the turbulent flow part, and the control piece is used for driving the turbulent flow part to rotate. By means of the technical scheme, the problems that in the prior art, due to the fact that channels between the plates of a traditional plate cooler are very narrow, the phenomenon of blockage after scaling is prone to occurring, and the heat exchange effect is affected are solved.

The invention relates to the technical field of medical apparatus and instruments, in particular to a scar rehabilitation therapeutic apparatus for realizing treatment based on AI evaluation analysis, which comprises a host, an AI evaluation system and a magnetic treatment component, and is characterized in that the host comprises a shell and an electric control system; the AI evaluation system comprises a data acquisition module and a treatment planning module; the data acquisition module is used for acquiring human body scar area information, the treatment planning module identifies data acquired by the data acquisition module, scar information is obtained after the data are identified and processed, and a scar rehabilitation treatment scheme is planned according to the scar information; the electric control system controls the magnetic treatment assembly to perform scar rehabilitation treatment according to the scar rehabilitation treatment scheme; the magnetic treatment assembly comprises a magnetic fixing device, a magnetic driving device and a magnetic patch; the magnetic patch is attached to a human body scar area, and the magnetic driving device executes a scar rehabilitation treatment scheme under the control of the electric control system, so that the magnetic patch rotates and moves.

The invention belongs to the technical field of heat exchange equipment, and particularly relates to a double-layer coil pipe type multi-stage heat exchanger and a heat exchange method thereof.The double-layer coil pipe type multi-stage heat exchanger comprises multiple heat exchanger bodies which are sequentially connected in series, each heat exchanger body comprises an outer cylinder, an inner cylinder, a first-layer coil pipe and a second-layer coil pipe, and each outer cylinder is arranged on the outer wall of the corresponding inner cylinder in a sleeving mode and provided with a fluid inlet and a fluid outlet; a fluid inlet and a fluid outlet which are communicated are formed in the inner cylinders, the fluid outlet of the upper-stage inner cylinder is communicated with the fluid inlet of the lower-stage inner cylinder, and the first-layer coil pipe and the second-layer coil pipe are both arranged in an annular cavity formed by the outer cylinder and the inner cylinders.

The utility model relates to the technical field of control devices, in particular to a throttling valve which comprises a valve body used for turning fluid, a Tesla valve is arranged on the rear side of the valve body in a matched mode, a cavity is formed in the valve body, a reversing block used for changing the direction of a fluid flow channel is connected in the cavity in a sliding mode, and an electromagnet is fixedly installed on one side wall of the cavity. A spring connected with the reversing block is inserted into the end, close to the reversing block, of the electromagnet through a protruding block, the front end face of the cavity is provided with a valve inlet flow channel communicating with the outside of the valve body and two valve outlet flow channels located on the two sides of the valve inlet flow channel, and the rear end face of the cavity is provided with two connecting holes which are symmetrically distributed and communicate with the outside of the valve body. The two connecting holes are inserted into through holes in the two ends of the Tesla valve through detachable connecting pipes correspondingly, and the front inner wall and the rear inner wall of the Tesla valve are each provided with a plurality of blocking plates which incline towards the connecting hole in one side at the same time and are sequentially parallel. The throttle valve is simple in structure, small in energy loss and easy to maintain, and the service life is prolonged.

The invention relates to a lift structure for an aerostat and a buoyancy adjusting method, and the structure realizes dynamic adjustment of lift and optimization of flight performance by combining a light gas storage chamber, a middle buffer chamber and an annular wing. The lift force structure comprises a floating main body, an annular wing, an air storage chamber, a middle buffer chamber and a control system, and further comprises an air filling unit and a pressure adjusting unit. The inner surface of the floating body defines a first air duct, and the annular wing and the floating body are spaced to form a second air duct. And the gas storage chamber and the middle buffer chamber are inflated and subjected to pressure regulation through the gas filling unit and the pressure regulation unit. The control system monitors the state of the aerostat in real time through the sensor array and adjusts the pressure of the air storage chamber and the middle buffer chamber and the absolute angle of attack of the annular wing through feedback control logic, so that dynamic adjustment of lift force and optimization of flight performance are achieved.

The utility model discloses chicken cutting equipment for food processing, which comprises a rack and a blade group, a speed change device is arranged on the right side of the rack, a fixing device is arranged above the rack, and two ends of the blade group are rotatably connected to the inner side of the rack; when the speed needs to be adjusted according to different chicken processing states, the gear shifting rod, the input shaft and the first driving gear and the second driving gear on the input shaft are pulled to move horizontally together, the meshed gear sets are changed, the transmission ratio is also changed, and therefore the rotating speed and torque of the blade are changed, and the cutting equipment can be used for cutting chicken in different processing states. Proper rotating speed and torque are selected, efficiency is improved, loss is reduced, after the machine is started, the roller can be attached to and press chicken all the time under the action of the spring and the connecting rod mechanism, the chicken enters the feeding port through the conveying belt, the guiding ratchet wheel fixes the chicken and conveys the chicken to the blade set for cutting, and manual chicken pushing for cutting operation is reduced; and the safety is improved.

The utility model relates to the field of water tanks, and discloses a circulating water heat dissipation pool. According to the heat dissipation device, the interior of the heat dissipation filler is composed of corrugated plastic sheets, a large surface area can be formed, contact and heat transfer between water and air are facilitated, the sliding block can be driven by an external component to change the position of the lower end of the heat dissipation filler in the baffle, and the servo motor and the connecting rod are combined; the servo motor serves as a power source for changing the angle of the heat dissipation assembly and can drive the connecting rod to change the positions of sliding blocks at the lower ends of the left side and the right side of the heat dissipation filler in the baffle, the effect of adjusting the angle of the heat dissipation filler is achieved, and the flowing path and speed of circulating water on the surface of the heat dissipation assembly are changed. The device is provided with the component for controlling the angle of the heat dissipation component, and the pool changes the flowing path and speed of circulating water on the surface of the heat dissipation component by adjusting the angle of the heat dissipation component, so that the contact mode of water and air is optimized, and the heat dissipation efficiency is improved.

The invention belongs to the technical field of NMP waste gas treatment, and particularly relates to an NMP waste gas return air treatment process which comprises a spray tower used for spraying and absorbing impurities mixed in introduced NMP waste gas, the lower portion of one side of the spray tower is communicated with a gas inlet channel, the top of the spray tower is communicated with a gas outlet channel, and a waste liquid collecting bin is formed at the bottom of the spray tower; the spraying mechanism is communicated with a water tank below one side of the spraying tower through a water supply pipe and is used for uniformly spraying liquid in the water tank into the spraying tower to be in contact with the introduced NMP waste gas for absorption; the filler adjusting mechanism is positioned below the spraying mechanism and is used for adjusting the loose and uniform degree of the filler balls filled in the filler cavity; by changing the flowing speed and the flowing direction of the entering waste gas in the filler cavity, the sufficient contact between water mist sprayed by the spraying mechanism and the entering waste gas can be adjusted, so that the sufficient filtering and washing effect on impurities such as particle residues or dust in the waste gas can be improved.

The utility model discloses a rice seed sorting system, and relates to the technical field of rice seed processing. The rice seed sorting system comprises a base, a shaking assembly and an adjusting assembly, a U-shaped frame is fixedly installed at the top of the base, a movable box is arranged on one side of the U-shaped frame, a sorting frame is arranged at the top of the base, the shaking assembly is arranged on the U-shaped frame, the adjusting assembly is arranged on the movable box, and the adjusting assembly comprises a threaded column, a movable plate and a limiting block. A movable plate is arranged on the threaded column, a limiting block is fixedly installed on one side of the movable plate, and the other side of the limiting block and the outer wall of one side of the sorting frame are fixedly installed. By arranging the adjusting assembly and adjusting the inclination angle of the sorting frame, the movement track and speed of the seeds on the sorting frame can be changed, so that the standing time and position of the seeds on the sorting frame are changed, the seeds and impurities can be effectively separated, the sorting accuracy can be improved, and the conditions of wrong sorting and missing sorting are reduced; the sorting efficiency is improved.

The utility model relates to the technical field of incinerators, and discloses a garbage incinerator feeding device which comprises a belt conveyor main machine frame, a belt is installed on the upper side of the belt conveyor main machine frame, a motor is fixedly installed on the surface of the outer side of the belt conveyor main machine frame, flanges are fixedly connected to the two sides of the outer surface of the belt, the flanges are arranged in a wave shape, and the belt conveyor main machine frame is arranged on the belt conveyor main machine frame. Baffles are fixedly connected to the outer side surface of the belt at equal intervals, two supporting columns are fixedly connected to the lower surface of the left end of the belt conveyor main rack, and a rotatable discharging plate is installed between the two supporting columns. The rotatable discharging plate is arranged, the upper end of the discharging plate is located on the lower side of the top end of the belt, garbage conveyed through the belt can turn over and fall off after being conveyed to the highest point, directly falls off to the surface of the discharging plate and then is conveyed into the incinerator through the discharging plate, in the whole process, the belt does not make close contact with a feeding opening in the upper portion of the incinerator, and therefore the garbage can be conveniently discharged. The belt can be prevented from being burnt, and the belt can be protected.

The utility model discloses a waterproof water guide groove for a building roof for building integrated photovoltaics (BIPV). The photovoltaic panel groove comprises a groove body, the groove body is arranged at a gap between every two adjacent photovoltaic panels, and the middle part of the groove body extends upwards to form a convex part; the groove body is divided into two water collecting grooves by the protruding part, and a plurality of drainage grooves are distributed in the water collecting grooves. A filter screen is fixedly arranged at the bottom of the drainage groove; a water collecting chamber is fixedly arranged at the bottom of the tank body; the gradient on the two sides of the protruding part accelerates the drainage speed of water flow, and therefore the drainage efficiency is improved. Due to the fact that the protruding part is arranged, a relatively high area is formed in the middle of the groove body, water flow can flow towards the two sides more easily, and accumulated water is prevented from being formed in the middle. The potential damage of moisture to the building and the photovoltaic panel is reduced, and meanwhile, the drying and cleaning of the tank body are kept; and the direction and the speed of water flow are changed through the protruding parts, impurities and particles can be precipitated in the water collecting chamber more easily, and therefore cleaning work is more convenient and efficient.

The invention relates to the technical field of heat energy power engineering, and discloses a waste heat recovery type heat energy driving device and application thereof in power engineering.The waste heat recovery type heat energy driving device comprises a transmission shaft, a suction machine, a pressure reduction assembly and a power assembly are sequentially arranged on the transmission shaft, the input end of the suction machine is connected with a suction pipe, and an adjusting assembly is arranged on the suction pipe; the end, away from the suction machine, of the suction pipe is connected with a boiler assembly, a filtering assembly is arranged on the side face of the boiler assembly, a cleaning assembly is arranged on the boiler assembly, and a connecting pipe is connected between the cleaning assembly and the power assembly. According to the boiler, the pressure reduction assembly is arranged, after pressure reduction and cooling are conducted on water vapor generated in the boiler, the water vapor is input into the power assembly to drive the transmission shaft to rotate, and therefore external mechanical equipment is driven to operate; by arranging the adjusting assembly, the flow of water vapor input into the power assembly is adjusted, so that it is guaranteed that the rotating speed of the transmission shaft is constant.

The present invention discloses a concentrate recovery device, including a concentration tank, a feeding mechanism, and the feeding mechanism is fixed in the concentration tank. An overflow port is provided at the top of the concentration tank, and a discharge port is provided at the bottom. The feeding mechanism includes a feeding fixed pipe, a flow stabilizing cylinder sleeved on the outside of the feeding fixed pipe, and the feeding fixed pipe is a cavity with a top or / and side opening, and the opening is the access point of the feeding pipe. A plurality of discharge holes penetrating the outside are provided at the bottom of the cavity, and the flow stabilizing cylinder and the feeding fixed pipe are arranged at intervals, and the discharge hole is placed in the turbid layer of the slurry in the concentration tank. The beneficial effects of the present invention are as follows: by installing the discharge hole in the turbid layer, the feeding point can be lowered to avoid making the clear water layer turbid. Through the flow blocking effect of the flow stabilizing cylinder, the slurry at the discharge hole encounters the flow stabilizing cylinder, the speed is reduced, and the flow direction is also changed, which reduces the impact force of the feeding, improves the feeding effect, increases the sedimentation speed of the entire sedimentation process, and improves the recovery rate.

The utility model relates to the technical field of test platforms, and discloses a servo motor test platform, which comprises a mounting seat, a storage groove is arranged at the upper part of the outer wall of the front end of the mounting seat, a servo motor is arranged at the bottom of the storage groove, and a temperature monitor is arranged at the upper part of the inner wall of the front end of the storage groove. When the servo motor test platform is used, the output end of the servo motor is connected with the coupling, the initial temperature and the end temperature are checked through the temperature monitor, and the servo motor is started to drive the coupling to rotate and drive the rotating column to rotate at the same time. A first load semi-ring and a second load semi-ring are placed on the outer wall of a connecting column, at the moment, a clamping block drives a limiting spring to compress under the action force, and when the clamping block coincides with a clamping groove, the limiting spring releases the action force to drive the clamping block to be clamped and matched with the clamping groove; and the first load semi-ring and the second load semi-ring can be conveniently and preliminarily limited.

The utility model relates to the field of refractory material processing, in particular to a refractory material crushing and screening device which comprises a crushing mechanism for crushing a refractory material and a rack for mounting and supporting, the adjusting mechanism is used for adjusting the crushing mechanism so as to cope with special materials, the power mechanism is used for providing power for the crushing mechanism and the adjusting mechanism, the crushing mechanism is installed on the rack, and the power end of a second crushing roller and the power end of a first crushing roller of the crushing mechanism are connected with the power mechanism; a tightness adjusting mechanism for adjusting tightness is arranged on the power mechanism corresponding to the second crushing roller, and a vibrating screen assembly is mounted at a discharge port of the crushing mechanism. The adjusting mechanism for driving the second crushing roller to transversely swing is arranged on the second crushing roller, so that when the second crushing roller and the first crushing roller meet harder refractory materials, axial reciprocating twisting force can be added under the original opposite rolling action force, composite force is applied to the refractory materials, and the crushing effect on the refractory materials is improved.

The invention relates to a single-rod common-weft cam power box and a high-speed rapier loom, a heald raising power set is arranged in a box body, the heald raising power set comprises a heald raising input shaft and a mounting shaft, the two ends of the heald raising input shaft are rotatably connected to the box body through bearings, the two ends of the mounting shaft are fixed to the box body, and the mounting shaft is fixed to the box body. Two heald-raising and weft-sharing cam groups are fixed on the heald-raising input shaft, each heald-raising and weft-sharing cam group comprises a cam I and a cam II, two heald-raising swing arms in one-to-one correspondence with the heald-raising and weft-sharing cam groups are connected onto the mounting shaft through bearings, and a roller I matched with the cam I and a roller II matched with the cam II are arranged on the heald-raising swing arms; the upper end of the heald raising swing arm is connected with a heald raising rod, and the heald raising rod is used for being connected with a heald frame; the rapier loom has the advantages that the mode that the single-side heald raising swing arm is matched with the common-weft cam is adopted, the heald raising swing arm can swing back and forth for three times when the heald raising swing arm rotates by one circle through the design of the cam, compared with an existing rapier loom, power can be improved by three times, and production efficiency is greatly improved.

This utility model discloses a high-pressure pump for a diesel engine, including a support device for support and protection. A support base is provided at the bottom of the support device. A transmission device is fixedly mounted on the upper surface of the support base near the rear. The transmission device is used for stepless speed regulation. The improved speed-regulating motor of this utility model adopts a series layout and is horizontally mounted on the transmission shaft between the power output end of the diesel engine module and the high-pressure water pump / centrifugal pump. This replaces the gearbox and high-speed shaft assembly located in this position in the original structure, realizing the integrated function of power transmission and speed regulation.

The utility model relates to the technical field of motorcycle accessories, and discloses an adjustable rear brake assembly which comprises a main pump, a wheel cylinder and a brake disc, the wheel cylinder is arranged at the top of the brake disc, and the main pump is connected with the wheel cylinder through an oil pipe; a push rod is led out of the bottom of the main pump; a rocker arm is arranged at the lower end of the push rod; the main pump comprises a shell and a piston, the piston is arranged on the lower side of the interior of the shell in a sliding mode, the bottom of the piston is fixedly connected with the upper end of the push rod, an adjusting screw rod is rotationally arranged at the top of the shell, an adjusting plate is arranged on the upper side of the interior of the shell in a sliding mode, and the middle of the adjusting plate is in threaded connection with the rod wall of the adjusting screw rod. The speed of hydraulic oil provided by the main pump for the branch pump is set to be adjustable, the braking speed of the brake disc can be adjusted, and therefore the braking distance of the motorcycle can be adjusted.

A washing machine drive system is provided. A washing machine driving system according to one aspect of the present specification includes: a cover body; the motor fixing piece is combined with the cover body; a rotor facing the stator; an output shaft coupled to the rotor and coupled to the cover body by a bearing; a planetary gear set splined to the outer peripheral surface of the output shaft; the clutch fixing piece is combined with the motor fixing piece; a clutch movable member that is spline-coupled to the outer peripheral surface of the planetary gear set so as to be movable in the vertical direction, and that faces the clutch fixed member; the clutch fixture includes first to third coils arranged side by side in the vertical direction.

The utility model belongs to the technical field of special equipment for ceramic capacitor manufacturing, specifically relates to a winding tension control system and a casting machine for multilayer ceramic capacitor manufacturing. The winding tension control system comprises a feeding roller shaft, a rotating part rotatable around its central shaft and coaxially fixedly connected with the feeding roller shaft, an adjusting belt provided along the outer edge of the rotating part and having a fixed end and a movable end, and a driving part connected to the movable end of the adjusting belt for providing a pushing and pulling force. The wrapping angle of the adjusting belt on the rotating part is less than 360 degrees. The rotating part can rotate synchronously with the feeding roller shaft. The driving part can generate a pushing and pulling force to change the tightness of the adjusting belt on the rotating part, thereby adjusting the rotating speed of the feeding roller shaft to make the tightness of the carrier film appropriate, and the carrier film tightness adjustment can be completed more quickly and conveniently. The casting machine for multilayer ceramic capacitor manufacturing comprises the aforementioned winding tension control system.

The utility model relates to the technical field of livestock breeding, in particular to feed mixing equipment for livestock breeding, which comprises a mixing box, a bottom cover is movably arranged at the bottom of the mixing box, a stirring rod is arranged in the mixing box, a driving mechanism is arranged at the top of the mixing box, and the stirring rod is in driving connection with the driving mechanism. A plurality of material storage boxes are fixedly mounted at the top of the mixing box, the bottom ends of the material storage boxes are communicated with the interior of the mixing box, rotating rods are rotatably mounted at the bottoms of the material storage boxes, driving grooves are formed in the outer surfaces of the rotating rods, and a reducing mechanism is coaxially arranged at one end of each rotating rod; the feeding device has the beneficial effects that the reducing mechanism is arranged at one end of the rotating rod and is in driving connection with the driving mechanism, and the rotating speed of the rotating rod can be changed along with the change of the diameter of the reducing mechanism, so that the discharging speed of the plurality of storage boxes can be controlled, and the effect of accurately controlling the discharging quantity of each storage box can be achieved.

The invention discloses an LED outdoor lighting intelligent control device, and relates to the technical field of LED outdoor lighting, the LED outdoor lighting intelligent control device comprises a shell, the shell is rotatably connected with a frame body, the top of the shell is fixedly connected with a fixing ring, the outer side of the fixing ring is provided with a plurality of filter holes, the filter holes are uniformly distributed in the outer side of the fixing ring, and the filter holes are communicated with the fixing ring. A heat conducting plate is fixedly connected into the shell, the side edge of the heat conducting plate makes contact with the outer side of the motor, the bottom of the heat conducting plate makes contact with the outer side of the baffle, square grooves are formed in the top and the outer side of the heat conducting plate, limiting rings are fixedly connected into the square grooves, and partition plates are fixedly connected into the square grooves. According to the LED outdoor lighting intelligent control device, the fan is driven by the motor to rotate, a complete air convection channel is formed, flowing air can take away part of temperature on the lighting lamp, and therefore active heat dissipation is effectively conducted on the lighting lamp, the LED lamp is not prone to being heated and damaged, and the service life of the LED lamp is prolonged.

The invention provides a pulping machine pulping energy consumption testing device, and relates to the technical field of pulping energy consumption test.The pulping machine pulping energy consumption testing device comprises a pulping machine body, an inlet end is arranged at the top of the pulping machine body, an outlet pipe is arranged on the side face of the bottom of the pulping machine body, a driving replacement assembly is arranged at the bottom of the pulping machine body, and the driving replacement assembly comprises a sliding rail; the concentration and volume of raw materials are adjusted through the adjusting assembly, the raw materials are fed into the pulping machine through the conveying pipe, the influence on energy consumption under different concentrations and volumes can be obtained, the feeding speed of the inlet end of the pulping machine is changed through the conveying assembly, and therefore the influence on the energy consumption of the pulping machine under different feeding speeds is obtained. Driving motors with different powers can be replaced through the driving replacement assembly to drive the pulping machine to grind materials, so that the influence of driving equipment with different powers on pulping energy consumption can be obtained, low-consumption elements when different raw materials are used can be obtained through comparison, and the test is simpler.

The invention relates to an eddy current type plane multidirectional bridge damping and energy dissipation system which comprises a center shaft, an upper metal disc gear assembly, a lower metal disc gear assembly, a fixing plate, a first rack, a second rack and a sliding rod piece, the fixing plate is fixedly connected with the center shaft, and the upper metal disc gear assembly and the lower metal disc gear assembly are arranged on the upper side and the lower side of the fixing plate respectively and rotationally connected with the center shaft; the first rack and the second rack are perpendicular to each other, are in sliding fit with the upper side face and the lower side face of the fixing plate respectively and are meshed with gears on the upper metal disc gear assembly and the lower metal disc gear assembly respectively, and the sliding rod piece is provided with a transverse connecting part and a longitudinal connecting part which are in sliding fit with the second rack and the first rack respectively. And a permanent magnet is arranged on the fixed plate so as to cut magnetic induction lines to generate induction current when the metal disc gear assembly rotates, and then eddy current damping force is generated to slow down or hinder continuous rotation of the metal disc gear assembly. The system has a multidirectional energy consumption function, is free of frictional wear and contact damping, and is simple in structure and low in implementation cost.

The utility model discloses sausage stuffing vacuum stirring device, including the blender, the blender inside rotation is connected with two groups of rotating shafts, the rotating shaft outside rotation is connected with a plurality of groups first rotating link, first rotating link outside fixed connection has the stirring piece, first rotating link one end fixed connection has the connecting gear, the connecting gear one side is connected with the rack, the rack sliding connection is in the rotating shaft outside, the rack one end penetrates the blender fixed connection has the connecting plate, the connecting plate inside screw thread connection has the first screw rod, first screw rod tail and blender rotation is connected, can change the angle of stirring blade according to different types of meat stuffing, can aim at the real -time change of material characteristic in the process of stirring sausage stuffing.

The invention discloses an auxiliary observation device for a chemical titration test, which comprises a display arranged on one side of a box body, a conical flask arranged in the middle of the interior of the box body, a burette arranged at the top of the conical flask, operation holes formed in two sides of the box body, a notch formed in the side surface of the conical flask, and a groove formed in the box body on the outer side of the conical flask, an observation mechanism for shooting the conical flask is arranged on the outer side of the conical flask; a stirring mechanism for stirring the conical flask at a variable speed is arranged on the outer side of the conical flask, the conical flask is shot at different distances through a global camera and a local camera which are different from the conical flask in distance and is stored and displayed on a display, and a solution in a burette is weighed by matching with a balance; the change process of the titration solution is visually seen on the display, the titration amount does not need to just reach the color change degree, the titration end point can be judged according to playback, errors caused by misjudgment of the color change are avoided, and the accuracy of the titration test is improved.

The utility model discloses an exhaust noise reduction constant temperature heat dissipation system, which comprises a mute box body, a partition plate is arranged in the mute box body to divide the mute box body into a unit chamber and a heat dissipation chamber, the unit chamber is provided with an air inlet port, the heat dissipation chamber is provided with an exhaust port, and the partition plate is provided with a communication port for communicating the unit chamber with the heat dissipation chamber. By means of the arrangement, due to the fact that the impedance combined type noise elimination channel is arranged at the position of the communication opening, when air in the unit cavity is pumped to the heat dissipation cavity, the impedance combined type noise elimination channel can block or consume sound waves in the box body, noise in the unit cavity is effectively prevented from leaking out, and noise in the unit cavity can be effectively eliminated. Therefore, sound insulation and noise reduction of the mute box body are realized.