189results about How to "Increase or decrease quantity" patented technology

The invention belongs to the technical field of belt conveyor maintenance, and particularly relates to a belt conveyor carrier roller disassembly and assembly auxiliary operation robot for a coal mine. Comprising a walking part, a power assembly, a carrier roller replacement box, a cab, an auxiliary operation platform and a lifting mechanism, the auxiliary operation platform comprises a posture adjusting platform capable of adjusting the direction, the inclination angle and the height; two groups of sliding telescopic mechanisms with the same telescopic direction are carried on the posture adjusting platform, and are respectively a left sliding telescopic mechanism and a right sliding telescopic mechanism; an action terminal of the left sliding telescopic mechanism carries a belt lifting supporting mechanism, and an action terminal of the right sliding telescopic mechanism carries a multi-degree-of-freedom disassembly and assembly manipulator; the auxiliary operation robot for disassembling and assembling the carrier roller can realize mechanical carrier roller replacement operation under the non-stop state of the belt conveyor, improve the operation efficiency, reduce the operation intensity, ensure the continuity of the coal mining process and ensure the safety and reliability of the carrier roller replacement process.

The utility model discloses a structure for modularized installation of photovoltaic panels on a color steel tile roof by using a composite material support, which comprises the color steel tile roof and a plurality of photovoltaic panels installed on the color steel tile roof through the composite material support, and the composite material support comprises a guide rail, a guide rail installation frame, a single-side positioning buckle and a double-side positioning buckle. By the adoption of the structure that the photovoltaic panel is installed on the color steel tile roof in a modularized mode through the composite material support, parts are few, construction difficulty is low, modularized installation of the photovoltaic panel is achieved, meanwhile, the guide rails are made of the glass fiber reinforced composite materials, cost is low, the weight is light, the deformation problem of the color steel tile roof can be avoided, and the service life of the color steel tile roof is prolonged. And meanwhile, the structural strength is equivalent to that of a metal material, the corrosion resistance is excellent, the long-term test of atrocious weather conditions can be resisted, the durability is realized, and the stability and the reliability of the installation of the photovoltaic panel are ensured.

The invention discloses an intelligent hospital logistics management platform, and relates to the technical field of logistics management. Comprising the following steps: establishing a hospital visual model through BIM, and adding a data acquisition device to a corresponding position of the visual model; performing type label setting on the data acquisition device according to the acquired data type, and then setting an attribute label according to the professional attribute of the target space where the data acquisition device is located; displaying corresponding equipment data according to the selected type tag and / or attribute tag; the method comprises the following steps: summarizing logistics information which comprises equipment data and repair data, identifying abnormal data in the equipment data, setting the corresponding equipment data as the abnormal data according to the content of the repair data, carrying out alarm processing on the abnormal data, processing according to position information, summarizing islanding logistics information, and sending the summarized islanding logistics information to a server; the service functions of logistics repair, alarm processing, energy analysis and the like of the whole hospital are undertaken, and the overall management level of the hospital is optimized.

The invention relates to the technical field of hydrogen production, in particular to a capacitor electrode and a decoupling water electrolysis hydrogen production square electrolytic bath, and by means of the design of gas and liquid flow channels of the capacitor electrode and the decoupling water electrolysis hydrogen production square electrolytic bath, hydrogen and oxygen can be isolated in water electrolysis reaction; the high cost of the ion exchange membrane is saved, and the limitation of the diaphragm is broken through, so that the working pressure of the electrolytic cell can reach 5MPa or even higher; by arranging the electrolytic cell limiting mechanism, the small electrolysis chambers can be prevented from falling, so that leakage of electrolyte is prevented, and meanwhile, due to the modular skid-mounted design, distributed moving and mounting are facilitated, and overhauling and maintenance during faults are facilitated; by means of the unique design of the square flow field, the square alkali liquor inlet and outlet and the square hydrogen / oxygen outlet, it can be ensured that the flow speed of an electrolyte flow channel is uniform, gas is exhausted in time, energy loss is reduced, and the electrolysis efficiency is improved.

The invention discloses a multi-source data fusion system, which comprises a data acquisition module, a data processing module, a data fusion module, a wireless transmission module, a display and early warning module and a remote server, the data acquisition module is used for acquiring data information in a farm through camera equipment and a sensor; the data processing module is used for receiving and processing the collected data information; the data fusion module is used for fusing the data information processed by the data processing module, analyzing the fused data information and generating an analysis result; and the display and early warning module is used for displaying the analysis result and judging whether an abnormal condition exists or not. The accuracy of pig breeding monitoring is improved, and the misjudgment rate caused by data instability of a single sensor is reduced. Real-time monitoring and informatization management of pig breeding are achieved, and the breeding efficiency and the management level are improved. The system has good expansibility, and the types and the number of sensors can be increased or decreased according to actual requirements.

The utility model belongs to the technical field of radiators, and particularly relates to a through hole plug-in type fin and a radiator provided with the through hole plug-in type fin. The problems that disassembly and assembly are inconvenient, use is not flexible, and the machining cost is high are solved. The through hole plug-in type fin comprises a strip-shaped plate-shaped fin body, plug-in holes used for being connected with flat pipes in a plug-in mode are formed in the fin body in a penetrating mode, and the fin body is further provided with a separation structure used for limiting the minimum distance when the fin body is arranged in a stacked mode. Detachable connection is achieved by inserting the flat pipes into the inserting holes of the fin body, disassembly and assembly are convenient, and good flexibility is achieved; meanwhile, only processing into a strip-shaped plate is needed, bending processing into a broken line shape or a wavy line is not needed, and the processing cost is reduced; and the arrangement of the separation structure also prevents the adjacent fins from being attached too close to influence the heat dissipation effect.

The invention discloses a series-parallel battery equalization system based on a multi-input single-output four-switch Buck-Boost converter and a working method thereof, the system comprises the series-parallel battery equalization system based on the multi-input single-output four-switch Buck-Boost converter, the series-parallel battery equalization system based on the multi-input single-output four-switch Buck-Boost converter is characterized by comprising m battery subsystems Mi, Mi, Mi, Mi, Mi, Mi, Mi, Mi, the positive electrode of the battery subsystem Mi is connected with the positive electrode of the power supply / load through a bus, and the negative electrode of the battery subsystem Mi is connected with the negative electrode of the battery / load through a bus; the plurality of battery subsystems Mi are connected in parallel; the battery subsystem Mi comprises a battery pack Packi and a converter Fi; the battery pack Packi comprises a battery Bi1 to a battery Bin; the converter Fi comprises an MOS (Metal Oxide Semiconductor) tube Qij1, an MOS tube Qij2, an MOS tube Qi1, an MOS tube Qi2, an inductor Li and a capacitor Ci; according to the invention, the number of switches, inductors and capacitors is reduced, the system cost is reduced, the system has strong expansibility and fault tolerance, in addition, the system can realize the equalization between the battery packs and the equalization in the battery packs under the charging and discharging and static conditions, the consistency of the batteries is improved, and the service life of the system can be prolonged.

This invention relates to the field of industrial robots, specifically to a heavy-duty robot with an adjustable counterweight arm. A robotic arm structure and a counterweight structure are respectively arranged on both sides of a support column. A first motor is located above the support column, and the output end of the first motor is connected to a first lead screw. The first motor drives the first lead screw to rotate, controlling the robotic arm structure to move up and down along the lead screw. A connecting structure is provided between the robotic arm structure and the counterweight structure. The counterweight structure contains several counterweight blocks, and a counterweight adjustment component is located on one side of the counterweight structure. The counterweight adjustment component can automatically increase or decrease the number of counterweight blocks inside the counterweight structure to balance the weight of the robotic arm structure. The adjustment is automatic based on the weight difference between one side of the robotic arm structure and the other side of the counterweight structure, eliminating the need for manual adjustment of the number of counterweight blocks and improving work efficiency.

The utility model discloses a detachable supporting assembly for a giant circular ring. The detachable supporting assembly comprises a lining plate, a first supporting rod, a second supporting rod and an adapter plate. The plurality of lining plates are uniformly arranged in a circle along the inner wall of the ring and are fixed with the inner wall of the ring by spot welding, the adapter plate is located at the center of the ring, the length of the two first support rods is slightly smaller than the diameter of the ring, two ends are connected with the lining plates through bolts, and the middle is connected with the adapter plate through bolts; the second inner supporting rods are arranged in the radial direction, the outer ends of the second inner supporting rods are connected with the inner lining plate through bolts, and the inner ends of the second inner supporting rods are connected with the adapter plate through bolts. The inner supporting assembly is simple in structure and convenient to construct, on the premise that stable supporting is guaranteed, mounting and dismounting difficulty is lowered, mounting time is shortened, labor cost is saved, meanwhile, welding workload is reduced, worker fatigue and welding quality reduction caused by long-time welding are avoided, the inner supporting assembly can be positioned and corrected through bolts, and the production efficiency is improved. Compared with an all-welded structure, stress concentration can be effectively reduced.

The utility model discloses an insulating separator plate of electrical equipment, which relates to the field of insulating separator plates, and comprises an insulating plate body, four corners of the upper surface of the insulating plate body are provided with mounting holes, the upper part of the insulating plate body is fixedly provided with a slide rail, the center position of the slide rail is provided with a slide groove, and the slide groove is internally provided with a separator plate structure. The number of the sliding rails is three sets, each set comprises four sliding rails, each set of sliding rails are arranged in a rectangular shape, and the three sets of sliding rails are gradually reduced from outside to inside in sequence. The insulating partition plate of the electrical equipment can be used for installing or adjusting a plurality of partition plate structures, so that the partition plate structures can be conveniently used for insulating and blocking parallel or parallel electrical equipment wire harnesses and instruments after the insulating plate body performs insulating work on a certain plane, and the functionality of the insulating partition plate is improved.

The utility model relates to the technical field of concrete precast slabs, in particular to a concrete precast slab mold cleaning device which comprises a base, one side of the base is fixedly connected with an electric push rod, one side of the output end of the electric push rod is fixedly connected with a fixing plate, and one side of the fixing plate is fixedly connected with a first motor. A movable block is slidably connected to one side of the fixed plate, a mounting plate is fixedly connected to one side of the movable block, a second motor is fixedly connected to one side of the mounting plate, a main brush is slidably connected to one side of the mounting plate, and an auxiliary brush is clamped to one side of the main brush. Compared with the prior art, the device has the advantages that the device is firstly moved to a proper position through the moving wheels, then the main brush is moved to a proper height position by starting the electric push rod through clamping matching of the main brush and the auxiliary brush according to the width of a mold, and then the main brush is driven to work by starting the second motor; and then the first motor is started to drive the main brush to move and clean.

The utility model discloses a sensor parallel wire harness which comprises a male end connector, the bottom end of the male end connector is fixedly connected with a protective sleeve through a connecting pipe, the position, close to the bottom, of the male end connector and the position, close to the top, of the protective sleeve are both fixedly connected with sleeving rings, and the bottom end of the protective sleeve is provided with a branching pipe. A vertical connecting block is fixedly arranged on the front side of the connecting pipe, and a limiting bolt is movably arranged on the vertical connecting block. The design of the wire harness allows a plurality of sensors to be connected at the same time, unified transmission of signals is achieved through a parallel connection mode, the number of the sensors can be increased or decreased conveniently according to actual requirements, and the flexibility and expandability of the system are improved. The mechanical structures such as the male end connector, the protective sleeve and the pop-up rod are adopted, the stability and reliability of wire harness connection are ensured, the locking effect and the vibration resistance of the wire harness are further enhanced through the design of the trapezoidal clamping block and the reset spring, and the possibility that the wire harness is loosened or falls off in the severe working environment is reduced.

The utility model discloses a steel pipe unit and a steel pipe cable structure. The steel pipe cable structure comprises a plurality of steel pipe units, an embedded sleeve, a steel inhaul cable, a first anchor and a second anchor. The steel pipe units are sequentially spliced end to end to form a steel pipe structure. The first anchor and the second anchor are arranged at the two ends of the steel pipe structure respectively. The embedded sleeve is arranged in the steel pipe structure and is coaxially arranged with each steel pipe unit; the two ends of the embedded sleeve extend out of the first anchor and the second anchor; the inhaul cable sequentially penetrates through the inhaul cable lug plates at the corresponding positions on the steel pipe units, and the two ends of the inhaul cable are connected with the two anchors respectively. The steel pipe cable structure has the beneficial effects that the rigid steel pipe and the flexible inhaul cable are combined, so that the overall stability of the structure can be improved; compared with the prior art, the steel pipe support is simple and flexible in structure, convenient to construct, capable of adapting to different construction environments and good in economical efficiency.

The application provides a pressure regulating filter device and a circulating integrated water tank, which are used for a cleaner. The pressure regulating filter device is installed in the circulating integrated water tank and comprises a filter assembly, a pressure regulating groove and a pressure regulating assembly. The filter assembly comprises a skeleton with an open top surface. The pressure regulating groove is connected with the front wall and the rear wall of the skeleton along the longitudinal direction of the water tank. The pressure regulating assembly comprises a plurality of pressure regulating balls arranged in the pressure regulating groove. Each pressure regulating ball can move in the longitudinal direction of the pressure regulating groove at any position. The circulating integrated water tank is provided with a water tank bayonet which can make the water circulation system of the cleaner work. The circulating integrated water tank comprises a water tank body set, a water tank bayonet, a water tank cover and a pressure regulating filter device. The water tank body set is in a cylindrical shape with an open large end, a closed small end and a hollow structure. The water tank bayonet is installed on the end face of the small end of the water tank body set. The water tank cover covers the open large end of the water tank body set. The pressure regulating filter device can be pushed into the water tank body set along the bayonet groove of the water tank body to realize the mutual fixation of the two.

The utility model discloses a kind of millisecond acquisition systems of steam total meter, including multiple steam total meter, operator communication server, LAN host, DCS station communication module and DCS production network host;4G transmission module is equipped on each steam total meter, and operator communication server is wirelessly connected by 4G network, for sending the steam data collected to operator communication server under different acquisition system according to different acquisition period;The operator communication server is connected with LAN host by wired or wireless network, and the steam data received is transmitted to LAN host;LAN host and DCS station communication module are connected using hand-in-hand parallel connection hardwiring connection mode, and the communication protocol of steam total meter is accessed DCS station communication module by modbus protocol channel;The DCS station communication module is connected with DCS production network host by wired connection.The utility model whole structure is simple and reasonable, practical and convenient, and stable in operation.

This invention discloses an evaporator for an adsorption refrigeration machine and the adsorption refrigeration machine itself, comprising: a cooling medium inlet and a cooling medium outlet; a liquid refrigerant inlet and a gaseous refrigerant outlet; at least one cooling medium flow plate for supplying cooling medium flow, each cooling medium flow plate being connected to both the cooling medium inlet and the cooling medium outlet; and at least one refrigerant flow plate for supplying refrigerant flow, each refrigerant flow plate being connected to both the liquid refrigerant inlet and the gaseous refrigerant outlet. The refrigerant flow plates and cooling medium flow plates are alternately stacked. This evaporator is a plate evaporator. By alternately stacking the cooling medium flow plates and refrigerant flow plates, plate cavities are formed between any adjacent cooling medium flow plates and refrigerant flow plates, creating alternating cooling medium flow spaces and refrigerant flow spaces. This achieves interactive heat exchange between the refrigerant and the cooling medium, resulting in a cooling effect. It has a high heat transfer coefficient, low thermal resistance, and high evaporation efficiency.

The utility model relates to the technical field of power transmission equipment, in particular to a multi-loop gas insulated cable branch joint, which comprises a box body, a sleeve, a mounting flange, a connecting bar, an SF6 pressure gauge and an incoming and outgoing line terminal, the incoming and outgoing line terminal is inserted in an inner hole of the sleeve, hardware fittings at the top of the sleeve are connected through the connecting bar, and the box body is a regular polyhedron. The central axis of each side surface is provided with one or three holes which are respectively suitable for single-core and three-core cables, the size of each hole is matched with that of a sleeve, and the holes can be used for insertion of incoming and outgoing line terminals; the upper end face of the box body is connected with an SF6 pressure gauge, the lower end face of the box body is closed, and a grounding terminal mounting hole is reserved outside the box body. And the loop can be reserved according to different construction time of the loop. Branching can be carried out according to the arrangement direction of the cable, the bending radius of the cable is reduced, and the occupied area is saved. The device is installed underground, can save earth surface land, and avoids external hidden dangers of normal operation of cable lines. The sleeve is preassembled in a factory, and only a plugging terminal needs to be manufactured on site, so that the installation is simple and convenient.

The utility model relates to an automatic pole piece threading mechanism which comprises a driving assembly, a chain, an original point sensor, a threading rod and a fixed chain wheel, the driving assembly, the original point sensor and the fixed chain wheel are installed on a machine frame, the driving assembly and the fixed chain wheel are connected through the chain, the threading rod is fixedly arranged on the chain, and the driving assembly drives the chain to conduct transmission. According to the automatic tape threading mechanism for the pole piece, the pole piece is fixed to the tape threading rod through the adhesive tape, the driving assemblies drive the chain to conduct transmission, and therefore the pole piece is driven to conduct tape threading along the chain, adverse effects caused by manual operation are reduced, the number of the driving assemblies can be increased or decreased according to the length of the chain, and the transmission efficiency is guaranteed; the belt penetrating rod connecting blocks are arranged on the chain every a certain distance, the belt penetrating rods are installed on the belt penetrating rod connecting blocks through screws, rapid disassembly and assembly are achieved, the original belt penetrating rods are made of carbon fiber materials, and the weight is reduced while the strength is guaranteed.

This invention discloses a high-precision PWM pulse generation circuit and chip. The PWM pulse generation circuit includes a PWM pulse group unit, an output logic unit, and a precision control unit. A set of delayed clock signal input ports are connected to a set of input terminals of the PWM pulse group unit; a first control signal input port is connected to the control terminal of the PWM pulse group unit; and a set of output terminals of the PWM pulse group unit are connected to a first set of input terminals of the output logic unit. A second control signal input port is connected to the input terminal of the precision control unit; and a set of output terminals of the precision control unit are connected to a second set of input terminals of the output logic unit. The output terminal of the output logic unit is connected to the output terminal of the PWM pulse generation circuit. This PWM pulse generation circuit realizes the generation and adjustable output of a set of high-precision PWM pulse signals.

This utility model discloses a piezoelectric ultrasonic sensor, relating to the field of sensors. It includes a mounting plate, a circuit board, and a sensor body. The circuit board is located in front of the mounting plate, and the sensor body is fixedly mounted on the front end of the circuit board. A connecting plate is fixedly mounted on the front end of the mounting plate. This utility model forms an elastic support structure. When the sensor body is subjected to external impact or vibration, the buffer spring can absorb energy through deformation, significantly reducing the mechanical stress transmitted to the circuit board and sensor body, preventing precision components from wearing or breaking due to vibration. The flow guide plate directs ambient sound waves to the sensor body, achieving a sound wave focusing effect and improving signal reception sensitivity. Furthermore, the sound wave reception angle and coverage range can be adjusted by sliding and rotating the flow guide plate to adapt to different detection scenarios. The number of flow guide plates can also be increased or decreased for customized applications.

The invention provides a temperature measuring device of an electrostatic chuck, the electrostatic chuck comprises a first electrode and a second electrode, the temperature measuring device comprises a plurality of adsorption parts and a plurality of temperature measuring parts, the adsorption parts are used for being placed on the surface, used for adsorbing a wafer, of the electrostatic chuck at intervals, and at least one adsorption part is placed corresponding to the first electrode. At least the other adsorption part is placed corresponding to the second electrode, the adsorption parts are at least electrically connected with two adsorption parts placed corresponding to the first electrode and the second electrode respectively, and the adsorption parts can be adsorbed on the electrostatic chuck when positive and negative adsorption voltages are loaded on the first electrode and the second electrode respectively; and the plurality of temperature measuring parts are arranged in one-to-one correspondence with the plurality of adsorption parts and are used for measuring the temperature of a plurality of positions of the electrostatic chuck. The temperature measuring device of the electrostatic chuck can accurately, flexibly and conveniently detect the temperature uniform distribution difference of the surface of the electrostatic chuck without damage.

The present invention relates to the technical field of heat treatment equipment, and in particular discloses a segmented induction quenching coil and heat treatment equipment. The segmented induction quenching coil comprises at least two hollow heating elements and a connecting unit. The at least two hollow heating elements are arranged on one side of a shaft to be processed and are sequentially connected along the axial direction of the shaft to be processed. An input port is provided at the upper end of each heating element and an output port is provided at the lower end. Among two adjacent heating elements, the output port of the upper heating element is connected to the input port of the heating element below it, and the two adjacent heating elements can slide relative to each other along the radial direction of the shaft to be processed. The connecting unit comprises a first mounting element provided with a first slide groove, a second mounting element and an adjusting component. The number of heating elements increases or decreases according to the number of shaft sections of the shaft to be processed. According to the change of the shaft diameter of each section, the adjusting component enables the two adjacent heating elements to move along the radial direction of the shaft to be processed, thereby realizing segmented heating adjustment, improving the heating method, improving the heating efficiency and reducing the production cost.

The utility model provides a kind of gravity type deepwater net cage with net clothes fixing device, comprising: deepwater net cage, platform and fixed mechanism, wherein, platform is installed on deepwater net cage, fixed mechanism includes rotating shaft, rotating block, first traction rope, gravity ball, second traction rope and counterweight, wherein, rotating shaft is rotatably connected in the bottom wall of platform, rotating block is sleeved in the outer wall of rotating shaft, the bottom wall of rotating block is connected with the one end of first traction rope, gravity ball is connected with the other end of first traction rope, the inside of platform is connected with the one end of second traction rope, counterweight is connected with the other end of second traction rope.The utility model embodiment of a kind of gravity type deepwater net cage with net clothes fixing device, by the setting of fixed mechanism, additional suspension gravity ball connects net clothes in seabed, strengthens net clothes stability, and staff can be according to actual sea conditions and aquaculture demand, by increasing or reducing counterweight quantity, adjust net cage diving depth, increase net clothes wind and wave effect.

The present invention discloses a cave monitoring system capable of controlling initial conditions, including a simulated precipitation module, a karst system and a monitoring system framework. The simulated precipitation module is composed of a pump room, a precipitation pipeline and a precipitation control system, which can realize personalized precipitation environment settings and provide support for diversity research needs; the karst system is divided into multiple subsystems, each of which includes a soil layer, a bedrock layer and a cave layer. The land cover type is simulated by adjusting the composition of the overlying vegetation, the hydrogeological background is simulated by adjusting the type and composition of the soil and bedrock, and the ventilation effect is simulated by adjusting the cave exhaust equipment; the monitoring system framework adopts reinforced concrete to provide a stable support for the system and separate the subsystems. The advantages of the system are highly accurate environmental simulation, real-time monitoring of multiple parameters, flexible and customizable experimental design and scalability, and it is expected to be widely used in a variety of related experimental fields.

The utility model discloses a battery pack tray with a rolling steel frame, which comprises a limiting module, a frame module and a bottom plate module which are sequentially stacked from top to bottom and are all provided with corresponding through holes. The three can be fixedly connected by sequentially penetrating through the matched through holes through connecting pieces; the bottom plate module and the frame module are assembled in a splicing mode, the bottom plate module and the frame module are also assembled in a splicing mode, the bottom plate module can be limited, a modular design and a stacking assembly mode are adopted, after the bottom plate module, the frame module and the bottom plate module are stacked, fixed connection of the bottom plate module, the frame module and the bottom plate module can be directly completed, assembly steps and time are greatly reduced, and assembly efficiency is improved.

The application provides a thermal management integrated module, a fault information reading method and system, and a vehicle. The thermal management integrated module comprises a plurality of electronic actuators, a controller and a memory. Each electronic actuator corresponds to a component. Each electronic actuator and the memory are in communication connection with the controller. The memory comprises: a dynamic message receiving and sending storage area, which is used for storing messages received and sent by each electronic actuator at a preset period during normal communication; a fault type counting area, which is used for storing the number of times that each electronic actuator is diagnosed as each preset fault type; and a fault frame storage area, which is used for storing the current communication frame at the moment of fault occurrence, subsequent continuous frame messages, a fault code and a time stamp when any electronic actuator fails. The application can realize centralized, faithful and safe fault information management of a multi-actuator thermal management system.

The invention belongs to the technical field of sewage treatment, and discloses a floor maintenance detergent processing sewage treatment water purifier which comprises a base, a control box is fixedly mounted at the top of an arc-shaped groove base, a fixing frame is arranged on one side of the arc-shaped groove control box, and a pretreatment mechanism is arranged on one side of the arc-shaped groove control box and located in a mounting frame; a connecting structure is arranged on one side of the arc-shaped groove pretreatment mechanism, and a first filtering tank is fixedly mounted at one end of the arc-shaped groove connecting structure. The filter layers are fixed in the first filter tank and the second filter tank by placing the mounting block and the mounting frame on the mounting plate, the multiple filter layers are conveniently mounted at the same time, the limiting block and the inserting block are conveniently moved by moving the moving block, and the mounting block is not fixed on the mounting frame any more; the number of the filtering layers can be reasonably increased or decreased according to the requirements of sewage with different pollution degrees, and the water quality treatment effect and efficiency are ensured.

The invention relates to a device and a method for measuring the average molecular weight of mixed gas, an ultrasonic transducer A and an ultrasonic transducer B are mounted on upstream and downstream pipe walls in the flowing direction of fluid in a pipeline, the ultrasonic transducer A and the ultrasonic transducer B are mounted opposite to the axis of the pipeline and form an included angle theta with the axis of the pipeline, and ultrasonic waves are transmitted according to a linear path. Calculating propagation time when the propagation direction of the ultrasonic waves is the same as the flow velocity of the measured medium and propagation time when the propagation direction of the ultrasonic waves is opposite to the flow velocity of the measured medium, thereby calculating the propagation speed of the ultrasonic waves in the measured medium and calculating the molecular weight; in the ultrasonic echo signal amplification module, a single-end signal is converted into a differential signal, compared with a common amplification mode of converting a single-end signal into a single-end signal, the anti-interference capability of the signal is enhanced, the flow and the molecular weight are measured by using an ultrasonic transducer, and the cost performance is high.

The utility model discloses a multi-type automatic core setting clamp for a gear sand core, which comprises a hook piece and a cavity penetrating through the middle of the sand core, and the hook piece is provided with a bottom hook contacted with the bottom surface of the sand core; the action mechanism drives the hanging component to linearly move; the limiting rods comprise a first limiting rod and a second limiting rod; the bottom of the first limiting rod can be in limiting contact with the top shaft end of the sand core, an arc strip is vertically fixed to the bottom of the second limiting rod, and one side of the concave face of the arc strip can be in limiting contact with the side face of the outer wall of the sand core; a top plate is fixed to the tops of the limiting rods; the arc strip is higher than the bottom hook; and a plurality of first limiting rods and a plurality of second limiting rods are arranged. In the core setting action of placing the sand core into the sand box, the sand core setting device ensures that the position of the sand core is relatively stable, and the phenomena of crushing and cracking caused by skewing and shaking are not easy to occur, so that the inner wall outline of a cast gear is ensured to meet the design requirement.

The utility model discloses a die workpiece suitable for punching a glue-containing copper foil, which comprises an upper die, a lower die arranged below the upper die, an upper die cavity arranged inside the upper die, a transverse plate fixedly mounted inside the upper die cavity of the upper die, a mounting plate arranged below the transverse plate, a punching head fixedly mounted below the mounting plate, and a lower die arranged below the punching head. The mounting plate is a U-shaped plate, a fixing bolt is arranged in the mounting plate, a long-strip-shaped hole is formed in the transverse plate, and the transverse plate is fixedly connected with the mounting plate through the fixing bolt. According to the die, the capability that the position of a punching structure is stable after adjustment is achieved, practicability is improved, and therefore the problems that an existing die is prone to sliding after the position of the punching structure is adjusted, the punching position is changed, and the number of punching structures is not convenient to increase or decrease according to needs are solved.