77results about How to "Solve insulation problems" patented technology

The invention discloses a linear injection-blowing-filling-sealing all-in-one machine which comprises a rack, a vertical injection molding machine, a handover station, a bottle blowing device, a filling device, a sealing device, a bottle discharging device, a linear transfer device and a bottle conveying device, wherein the vertical injection molding machine, the handover station, the bottle blowing device, the filling device, the sealing device and the bottle discharging device are arranged on the rack. The bottle inlet and outlet lines of the bottles in the bottle preform forming mold, the handover station, the bottle blowing device, the filling device, the sealing device and the bottle outlet device in the vertical injection molding machine are the same central axis; the linear transfer device is arranged in an opening and closing mode in the transverse width direction of the rack so as to be used for containing, receiving and preserving heat of a row of bottle preform columns which freely fall off when the bottle preform forming molds are demolded and transferring the bottle preform columns to a handover station in a sliding mode. And the bottle conveying device is used for simultaneously clamping a plurality of groups of bottle rows which are sequentially arranged on the central axis between the handover station and the sealing device, respectively moving the bottle rows to the next station and then returning the bottle rows to the previous station along the central axis. The whole structure is simple, the action precision is high, energy consumption and cost can be effectively reduced, and meanwhile the production efficiency is improved.

The invention belongs to the technical field of non-ferrous metal profile forming, and relates to a shaping method and device for titanium and titanium alloy arc-shaped profiles. According to the shaping method, the problems of large curvature radius change, profile distortion, poor flatness and the like caused by rebound of the bent titanium and titanium alloy arc-shaped profiles are solved through hot shaping treatment, and the annealing device is used for annealing treatment to solve the problem of secondary deformation of the arc-shaped profiles in the annealing process of eliminating residual stress. Before the shape correcting machine is used for correcting the shape, the arc-shaped profiled bar is firstly placed in a space and is heated to a preset temperature on line, so that the problems of high resistance, poor plasticity, high resilience and difficulty in deformation of the profiled bar in a normal temperature state are solved, and meanwhile, various problems caused by secondary transfer of a hot material after offline heating and clamping and re-positioning of the arc-shaped profiled bar are also solved. According to the annealing device, the arc-shaped profiled bar, the bottom plate and the fixing block assembly form a coating whole, so that the possibility of secondary deformation of the arc-shaped profiled bar in the annealing process of eliminating residual stress is effectively avoided.

The invention discloses a combined fixing device of a marine LNG fuel C-shaped storage tank, belongs to the technical field of ship manufacturing, and solves the problem that an existing marine LNG fuel C-shaped storage tank is easy to loosen. The anti-explosion ship comprises a combined storage tank, an anti-explosion box and a plurality of ship body bases, the anti-explosion box is arranged at one end of the combined storage tank in a sleeving mode, and the anti-explosion box and the combined storage tank are fixed in a welded and sealed mode; a plurality of supporting legs are arranged at the bottom of the combined storage tank and are in lap joint with a plurality of ship body bases in a one-to-one correspondence mode, and each supporting leg is fixedly connected with the corresponding ship body base through a bolt and nut assembly. A glass fiber reinforced plastic layer and an epoxy resin layer are sequentially arranged between each supporting leg and the ship body base from top to bottom. According to the combined fixing device, the mounting stability of the C-shaped LNG fuel storage tank for the ship can be improved. The invention further discloses a combined fixing method of the marine LNG fuel C-shaped storage tank. According to the method, rapid, accurate and stable installation can be achieved.

The present invention relates to the technical field of PCB board detection, specifically to a PCB board coating quality detection method, which includes segmenting the collected PCB image to obtain a three-proof paint coverage area map; performing edge filtering processing to obtain an image containing bubble edge information; extracting bubble features to obtain a bubble feature map set; calculating a bubble result set; and classifying the bubble result set to obtain conclusions and suggestions. The PCB board coating quality detection method detects by segmenting the collected PCB image to obtain a three-proof paint coverage area map, and then performing edge filtering processing, extracting bubble features, calculating bubble size and other steps to obtain the bubble situation of the PCB board, and classifying the bubble result set to obtain conclusions and suggestions, thereby realizing the detection of PCB board coating bubbles and solving the problem of blistering or bubbles on the PCB, which affects the flatness and insulation performance of the coating.

The invention relates to the technical field of winding wires, and provides a damp-proof high-voltage submersible motor winding wire and a preparation method thereof.The damp-proof high-voltage submersible motor winding wire sequentially comprises a conductor and insulating layers from inside to outside, the conductor is a round copper wire, the insulating layers comprise the first insulating layer, the second insulating layer and the third insulating layer, the first insulating layer wraps the conductor, the second insulating layer wraps the first insulating layer, and the third insulating layer wraps the second insulating layer. The third insulating layer wraps the outer side of the second insulating layer, the first insulating layer is a polyimide film I, the second insulating layer is fluoroplastic, and the third insulating layer is a polyimide film II. According to the technical scheme, the problem that in the prior art, a submersible motor winding wire is poor in insulativity and mechanical performance is solved.

The invention provides a simulated guide tube rod and a simulated nuclear reactor, and the simulated guide tube rod comprises a core rod which comprises a boss, a middle rod, a connector and a core rod groove; part of the core rod is located in the outer pipe, the outer pipe comprises a pipe part and an outer pipe groove for containing the boss, and first gaps are formed between the inner wall of the pipe part of the outer pipe and the outer wall of the core rod and between the inner wall of the outer pipe groove and the outer wall of the core rod; the end plug comprises a first part and a second part, the first part is matched with the core rod groove, the second part is located below the outer pipe, and the diameter of the second part is larger than or equal to that of the outer pipe; the sealing filler, the inner wall of part of the outer pipe groove, the boss and the second part jointly form a first space, and the sealing filler is located in the first space and suitable for sealing the first space. The simulated guide tube rod and the simulated nuclear reactor provided by the invention can help to solve the problem of insulation between the guide tube rod and a peripheral electrified part, and the performance of the guide tube rod is further improved.

The invention discloses an electrode insulation water-cooling assembly used in a radiation heating experiment module and an installation method, and relates to the field of material radiation heating tests, and the electrode insulation water-cooling assembly mainly comprises a metal hose, a flange, an insulation part and a metal pipe sleeve. One end of the metal hose is welded with the flange, the flange is connected with the insulating part through a bolt, the insulating part is connected with the metal pipe sleeve through a bolt, and the insulating part is respectively subjected to end face sealing with the flange and the metal pipe sleeve. The structure is simple, installation and disassembly are convenient, the insulation problem of electrode water cooling in the radiation heating experiment module can be well solved, and the risk that a metal water pipe makes contact with other parts to cause electrification is avoided.

The utility model discloses an electronic water pump and a hydrogen fuel cell system. An insulating coating is arranged on the inner surface of the electronic water pump. The insulating coating is arranged on the inner surface of the volute of the water pump, especially the contact position of the volute and cooling liquid, so that the interior of the volute and the surface of the volute are insulated, the cooling liquid and a motor shell are insulated, the insulating coating is applied to the hydrogen fuel cell system, the insulation problem of the electronic water pump in the hydrogen fuel cell system can be solved, and the service life of the electronic water pump is prolonged. And meanwhile, the risk of water leakage caused by inconsistent expansion coefficients of materials of parts of the electronic water pump is reduced.

The invention relates to the technical field of press heat dissipation, in particular to a press storage location temperature control method based on a PI D algorithm, and the method comprises the steps: 1, collecting a real-time temperature signal of a press storage location through a temperature sensor when the press storage location works normally, and transmitting the real-time temperature signal to a PLC control unit; 2, the temperature signal is fed back and transmitted to a PID controller through a PLC control unit, the PID controller outputs a control signal to regulate and control the rotating speed of a side face storage location fan of the press, and meanwhile storage location temperature information of the side face fan is collected and fed back to the PLC control unit; and 3, when the temperature of the storage location does not reach the parameter value set by the user, the PID controller outputs a control signal to the electric ball valve, the electric ball valve controls the opening degree of the ball valve according to the received control signal so as to adjust the water temperature, and meanwhile, the flowmeter records the real-time water inflow and feeds back a signal to the PID controller.

A device for removing moisture and moisture of a buffer layer of a high-voltage power cable belongs to the technical field of electrical engineering and comprises a front end portion, a cable portion, a parameter setting portion and a feedback portion, the front end portion comprises a nitrogen cylinder, an electronic valve I, a heating gas tank and an electronic valve II, and the opening of the nitrogen cylinder is provided with the electronic valve I; the electronic valve I is connected with the heating gas tank through a rubber gas pipe; an electronic valve II is arranged at an outlet of the heating gas tank; the cable part comprises a cable, an air inlet is formed in the end of the cable, an air outlet is formed in the damped part of the cable, and the air inlet is connected with an electronic valve II through a rubber pipe; and the parameter measuring part comprises a temperature and humidity transmitter I and a temperature and humidity transmitter II which are respectively arranged at the positions of an air inlet and an air outlet of the cable. The heating nitrogen dehumidification process is optimized, the optimal dehumidification condition is explored through experiments and simulation means, the dehumidification efficiency can be improved, energy consumption can be effectively reduced, and resources are saved.

A small-radius curve joint insulation device with guard rails comprises a spacer block lapped between two butt-joint steel rail interfaces, an insulation inner clamping plate is arranged between the spacer block and a steel rail, an insulation outer clamping plate opposite to the insulation inner clamping plate is arranged on the outer side of the steel rail, and a spacer piece is arranged between the butt-joint steel rail interfaces; the I-shaped section insulation is combined with the spacer block and the groove-shaped insulation, so that the problems of pulling deformation and insulation failure caused by uneven stress of double-section insulation are solved; the insulation assembly can be better attached to a track structure, stress is effectively dispersed, the impact resistance is improved, long-term stable operation is ensured, and the requirements of high-load and high-frequency train operation are met. According to the device, the mechanical strength of the insulation assembly is improved, the problems of deformation and aging caused by long-term use are reduced, the service life of equipment is prolonged, the stability and reliability of a track circuit are further improved, and safe and efficient operation of railway transportation is ensured.

The invention discloses an anti-scouring tundish dry material, and relates to the technical field of tundish refractory materials, and the tundish dry material comprises the following raw material components by mass: 28-32% of 3-1mm fused magnesite, 10-20% of alumina powder, 10-20% of alumina powder, and the balance of alumina powder. The invention relates to an ultra-low thermal conductivity refractory brick which comprises the following components in percentage by weight: 22-30% of 1-0mm fused magnesia, 20-28% of 200-mesh fused magnesia, 3-4.5% of phenolic resin, 1-1.4% of rectorite powder, 0.2-0.3% of SiO2 aerogel powder and the balance of 5-3mm fused magnesia. According to the ultra-low thermal conductivity refractory brick, the special layered structure of the rectorite powder and the ultra-low thermal conductivity of the SiO2 aerogel powder are ingeniously utilized; through the synergistic effect of the two components, the tundish dry material successfully solves the problems of insufficient strength and poor thermal insulation performance on the basis of keeping the original good fire resistance, and the efficiency and economical efficiency of a continuous casting process are remarkably improved.

The invention provides a newborn mouse incubator internally provided with an automatic milk feeding device. The newborn mouse incubator comprises an incubator body, a mother mouse feeding simulator and a temperature adjusting controller. According to the newborn mouse incubator internally provided with the automatic milk feeding device, the height-adjustable mother mouse feeding simulator is installed on the surface of the incubator cover, milk can be added through the milk inlet hole through an injector or cleaned through clean water in a suction mode, and after newborn mice are placed on the soft cushion, milk liquid can be sucked through the breast-imitating suction nozzle; the heating device in the box body is adjusted through the temperature adjusting controller to keep constant temperature, milk is kept warm while the body temperature of a mother mouse is simulated, the box body has the heat preservation and moisture preservation functions, an operation hole is formed in the side face, and an experimenter can stretch a single hand to enter the box body to grab a newborn mouse. The device is simple in structure and high in practicability, the newborn mouse incubator is provided, the female mouse feeding effect is simulated, the problems of milk feeding and heat preservation in the animal experiment of the newborn mouse after the newborn mouse leaves the female mouse are solved, the experiment efficiency of the animal experiment of the newborn mouse is improved, and the practicability of the device is improved.

The invention discloses a pouring feeding device which comprises a supporting frame, a supporting block is connected to the supporting frame in a sliding mode, and an adjusting bolt for locking the supporting block is arranged on one side wall of the supporting frame; the pouring ladle is arranged on the inner side of the supporting frame, and trunnions matched with the supporting blocks are arranged on the side wall of the pouring ladle; the hanging bracket is fixed on the trunnion, and a hanging ring matched with an external hanging hook is arranged at the top end of the hanging bracket; a first cover plate; the second cover plate and the first cover plate are arranged at the top end of the supporting frame side by side; by arranging the hanging bracket, the hanging ring, the first cover plate, the second cover plate and the rope assembly, the device is easy and convenient to operate, the cover plates do not need to be manually opened additionally, the first cover plate and the second cover plate can be opened when the pouring ladle is hoisted, the top end of the pouring ladle is automatically shielded when materials are fed to a sand box, and therefore heat preservation of the pouring ladle is achieved; operation is simple, and the using effect of the device is improved.

The invention relates to an infrared thermal imaging electric power meter which comprises meter internal components, a meter shell and external terminals on the meter shell, and the meter internal components comprise a signal measurement function board, a voltage measurement device, a current measurement device, a switch state measurement device and an infrared thermal imaging temperature measurement device. The instrument shell is provided with a plurality of external terminals, the devices are connected to a signal measurement function board through an IIC bus, the instrument shell is provided with a liquid crystal display, the liquid crystal display is connected to the signal measurement function board, and the external terminals comprise a voltage measurement terminal, a current measurement terminal, a switching value measurement terminal and an infrared thermal imaging temperature measurement terminal. According to the method, infrared thermal imaging is adopted, contact is not needed, an imaging mode is adopted, the temperature of an area can be recognized like a picture, and a point position with the higher temperature can be screened out. Insulation and electrical creepage between electrical equipment under high voltage are solved through non-contact temperature measurement, the service life is longer, and the device is not affected by the environment.

The 10kV high-voltage multi-unit isolation auxiliary power supply comprises a first-stage circuit, a second-stage circuit, a third-stage circuit and a fourth-stage circuit, wherein the first-stage circuit, the second-stage circuit and the fourth-stage circuit are respectively composed of an NCP1396 control circuit, a current sampling circuit, a half-bridge LLC input side main circuit and a magnet ring transformer output rectification filter circuit; the half-bridge LLC input side main circuit is composed of a DC power supply DC1, an upper MOS tube Q3, a lower MOS tube Q4, a resonant capacitor C1, a resonant inductor L4 and a magnet ring transformer TR3. The current sampling circuit is composed of a current detection resistor R1 and an RC filter circuit. The NCP1396 control circuit is used for providing complementary and isolated driving control signals for grid electrodes of the upper MOS tube and the lower MOS tube, the input side of the magnetic ring transformer is connected with a turn of high-voltage 10kV insulated wire in series to serve as a primary winding, power supply of a high-voltage unit power source is met, meanwhile, the requirement for ultrahigh-voltage isolation is met, the requirements for voltage-withstanding insulation and power supply between units are met, and the service life of the high-voltage unit power source is prolonged. And the volume and the cost are well balanced.

The utility model belongs to the technical field of aftertreatment, and particularly relates to a heat insulation structure of a detachable V-shaped hoop for tail gas aftertreatment. The heat insulation structure comprises a first heat insulation cover and a second heat insulation cover, one ends of the first heat insulation cover and the second heat insulation cover are connected through a connecting shaft, and the other ends are movably connected through a support and a buckle. Heat insulation pasting cotton is pasted on the inner sides of the first heat insulation cover and the second heat insulation cover. The whole heat shield is of a metal ring structure, and the requirements for strength and attractiveness are met; a connecting shaft and a buckle are arranged, so that the V-shaped hoop is convenient to mount and dismount; the bolt avoiding cover is arranged and can be matched with a post-processed V-shaped hoop; cotton is attached to the inner layer, and the heat insulation performance is enhanced; the heat insulation problem of the V-shaped hoop of an existing post-treatment product can be solved, the advantages of being good in durability, attractive in appearance and the like are achieved, and meanwhile the cost and detachability of the hoop heat insulation cover can be considered.

The invention relates to the technical field of winding wires, and proposes an insulated submersible motor winding wire and a preparation method thereof. The insulated submersible motor winding wire includes a wire core, a film layer, and an insulating layer from the inside to the outside. The wire core is composed of a conductor and a coating. The conductor is a copper wire, the coating is a nickel coating, the film layer is a polyester film, and the insulating layer includes the following raw materials by weight: 60-70 parts of polyethylene, 20-30 parts of filler, 1-3 parts of silane coupling agent, 1-2 parts of lubricant, and 2-3 parts of antioxidant; the filler includes bentonite and modified alumina, and the modified alumina is obtained by modifying alumina with nitride. Through the above technical scheme, the problem of poor mechanical properties and insulation of the winding wire in the related art is solved.

The utility model discloses a battery box and an automobile, and relates to the technical field of automobiles, the battery box comprises a box body and a heat preservation bottom protection plate, the box body is provided with an installation cavity, the installation cavity is used for installing a battery, and the bottom of the box body is provided with a heat exchange opening communicated with the installation cavity; the heat preservation bottom protection plate is detachably connected with the box body so as to cover or open the heat exchange opening. According to the technical scheme provided by the utility model, the problem of contradiction between heat dissipation and heat preservation of the battery system can be effectively solved.

This invention belongs to the field of semiconductor device fabrication technology and discloses a method for fabricating high-temperature, high-power-density SiC power semiconductor devices. The invention has low equipment requirements: due to the short sintering time, few sintering cycles, and all planar sintering, a common hot press and heating table can be used for sintering in air, eliminating the need for expensive nitrogen-filled pressurized silver sintering furnaces. The process is simple and fast: only two sintering cycles, two welding cycles, one bonding cycle, and one potting cycle are needed to complete the fabrication of a double-sided cooled 250°C high-temperature SiC power semiconductor device, including a heat dissipation base plate and insulating potting. A low-cost solution for 250°C high-temperature applications: expensive materials such as nano-silver are used only in some key locations. Utilizing thermal diffusion characteristics, high-temperature solder is used instead of nano-silver at the heat dissipation base plate-substrate welding interface where heat flow is fully diffused. This avoids the problems of high difficulty and high material cost associated with large-area silver sintering without significantly reducing heat dissipation performance.

The embodiment of the present application relates to a photovoltaic module, comprising: a plurality of cells, each of which comprises a plurality of grid lines arranged at intervals along a first direction; a plurality of connecting components, each of which is in electrical contact with at least one of the grid lines of any two adjacent cells, and the melting point of the connecting component is a first temperature; a plurality of glue point groups, each of which is located on the surface of a corresponding cell, the glue point group comprises a plurality of glue points, and the plurality of glue points are in contact with and connected to a connecting component corresponding to the glue point group; a packaging film, the packaging film covers the surfaces of the plurality of cells and the surfaces of the plurality of connecting components, the melting point of the portion of the packaging film adjacent to the plurality of cells is a second temperature, and the second temperature is greater than the first temperature; a cover plate, the cover plate covers the surface of the packaging film away from the plurality of cells. At least it is helpful to improve the reliability of the photovoltaic module.

The invention relates to the technical field of vehicle glass, in particular to laminated glass and a vehicle, the laminated glass comprises an outer glass plate, an inner glass plate, a bonding layer and a non-metal reflecting film which are stacked, the outer glass plate is provided with a first surface and a second surface, and the inner glass plate is provided with a third surface and a fourth surface; the bonding layer is located between the second surface and the third surface, and the non-metal reflecting film is located between the second surface and the bonding layer, or located between the bonding layer and the third surface, or located on the fourth surface, or located in the bonding layer; the solar direct reflectivity RE of the laminated glass measured from one side of the first surface meets the condition that RE is larger than or equal to 12%. The problem of thermal insulation of thermal management of the whole vehicle is solved, and the wireless communication quality in the vehicle can be guaranteed.

The present invention discloses a double-resistance transition circuit of a vacuum on-load tap changer and a voltage regulation method. The transition circuit comprises: a first main contact MC1, a second main contact MC2, a first auxiliary vacuum contact V1, a second auxiliary vacuum contact V3, a main vacuum contact V2, a first switch Z1, a second switch Z2, a first transition resistor R1 and a second transition resistor R2. The present invention designs two auxiliary vacuum contact branches, and the task of cutting off the circulating current is taken turns by two auxiliary vacuum contacts. The switching procedure is symmetrical, so that the burning of the two auxiliary vacuum contacts is completely consistent. Compared with the current transition circuit of "single main vacuum contact, single auxiliary vacuum contact" structure, the switching capacity of the main vacuum contact and the auxiliary vacuum contact can be balanced. At the same time, two transition resistors are designed to work in rotation to solve the problem that the temperature of the transition resistor is too high due to the heating of the single transition resistor, resulting in the decomposition and gas production of transformer oil and the reduction of insulation performance, thereby improving the electrical life of the entire vacuum on-load tap changer.

The invention relates to the technical field of winding wires, and provides an insulating submersible motor winding wire and a preparation method thereof.The insulating submersible motor winding wire sequentially comprises a wire core, a film layer and an insulating layer from inside to outside, the wire core is composed of a conductor and a plating layer, the conductor is a copper wire, the plating layer is a nickel plating layer, and the film layer is a polyester film; the insulating layer comprises the following raw materials in parts by weight: 60-70 parts of polyethylene, 20-30 parts of filler, 1-3 parts of a silane coupling agent, 1-2 parts of a lubricant and 2-3 parts of an antioxidant; the filler comprises bentonite and modified aluminum oxide, and the modified aluminum oxide is obtained by modifying aluminum oxide through nitride. According to the technical scheme, the problem that the winding wire is poor in mechanical property and insulativity in the prior art is solved.

The invention discloses a projection lamp mounting structure suitable for an outer curtain wall, and belongs to the technical field of building decoration. The installation structure comprises a projection lamp, a cable, a lamp groove box and a wire groove, the wire groove is installed on the bottom face of the outer curtain wall, the lamp groove box comprises a main body part and an extension part, the main body part is arranged on the side face of the outer curtain wall, the extension part extends from the main body part to the wire groove and is installed on the bottom face of the outer curtain wall, and the projection lamp is connected with the cable. The projection lamp is arranged in the main body part of the lamp groove box, the cable is arranged in the cable groove, the top end of the main body part is an open end, so that the projection lamp projects light to the surface of the outer curtain wall from the main body part, and a water outlet is formed in the bottom end of the main body part. The problem that in the prior art, multiple solid structures are laid layer by layer and directly installed on the surface of the outer curtain wall, and consequently the heat preservation and waterproof performance of the surface of the outer curtain wall is reduced is solved.

The invention discloses a pure gas type direct current wall bushing which comprises a current-carrying conducting rod, a connecting cylinder and a shielding cylinder, the connecting cylinder is connected with an outdoor insulator and an indoor insulator, the connecting cylinder is provided with an inner flange, the connecting cylinder, the outdoor insulator and the indoor insulator jointly form a containing space, and the containing space is filled with insulating gas with preset air pressure. The shielding cylinder is located in the containing space, the middle of the outer surface of the shielding cylinder is connected with the inner flange, the current-carrying conducting rod is located in the containing space and penetrates through the shielding cylinder, one end of the current-carrying conducting rod is connected with the outdoor current-carrying terminal, the other end of the current-carrying conducting rod is connected with the indoor current-carrying terminal, and the indoor current-carrying terminal or the outdoor current-carrying terminal is connected with the head cover plate through the telescopic pipe. The pure gas type direct current wall bushing provided by the invention can better solve the contradiction between the insulating property and the thermal property.

An integrated combined support below an electric automobile cab comprises a support body, an electromagnetic switch support, a seven-way fuse box support, a low-voltage distribution box support, a battery management unit support, an all-in-one controller support and an inflation pump support. An all-in-one controller, an electromagnetic switch, a low-voltage distribution box, a storage battery, a seven-loop fuse box, a battery management unit, an air conditioner two-in-one device, a steering oil pump and an inflating pump are installed into a whole, the integration and modularization degree is high, high-voltage and low-voltage accessories are integrally arranged below a cab, a support body is of a layered structure, space is saved for arrangement of a power battery, and the structure is simple. The combined support and parts can be subpackaged off line and integrally assembled on the frame, installation is convenient and fast, the assembling efficiency is improved, movement of the storage battery can be effectively limited, a special storage battery limiting structure does not need to be arranged, the structure is simplified, and assembling and using are convenient.

The invention provides a work order work efficiency intelligent analysis method applied to equipment in a building, and the method comprises the steps: evaluating whether key parameters of a test point accord with a test specification or not through a pre-established test specification condition judgment logic for each piece of structured test point data, and if the key parameters of each test point accord with the test specification, judging whether the key parameters of each test point accord with the test specification; the test quality of the test point is qualified; after evaluation results of indexes of test point coverage rate, key parameter integrity, test value range conformity and test duration sufficiency are obtained, weight coefficients of the indexes are set, integral test step integrity scores of an insulation resistance test and an insulation voltage resistance test are calculated, and quantitative indexes for measuring test normativity are obtained.

This application relates to the field of cable protection pipe technology, and in particular to a low-temperature impact-resistant CPVC cable protection pipe, which includes a protection pipe body, an insulation layer, and a circulation mechanism. An impact-resistant mechanism is fixedly connected to the inner side of the protection pipe body. A cable body is inserted through the insulation pipe body inside the impact-resistant mechanism. A heat exchange mechanism is fixedly connected to the outer surface of the insulation pipe body. The circulation mechanism is located at the top of the protection pipe. This technical solution, through its heat exchange, circulation, impact resistance, and heat recovery structure, combined with a composite insulation layer and a suitable heat exchange medium, efficiently absorbs solar energy and recovers waste heat from the cable, continuously insulating the protection pipe body day and night, resisting external impacts, preventing low-temperature embrittlement and cable overheating, adapting to different low-temperature environments, reducing heat loss and energy consumption, and solving the problems of existing CPVC cable protection pipes such as poor resistance to low temperatures, weak impact resistance, and limited adaptability.

A railway line center inspection vehicle includes a traveling trolley, a gauge ruler, an ultra-high detector and a prism measuring device. The gauge ruler includes a bottom plate and two racks. An intermediate gear is arranged at the center of the bottom plate. One rack is arranged on one side of the intermediate gear and a scale is arranged on the rack. Another rack is arranged on the other side of the intermediate gear and a pointer is arranged on the rack. The rack meshes with the intermediate gear. A spring is arranged at one end of the rack. An electric insulating bearing is connected to the other end of the rack. The electric insulating bearing contacts the inner side of the rail. A support frame is arranged on the bottom plate and the rack. The support frame is connected to the traveling trolley. The prism measuring device includes a prism, a prism rod and a pressure block. One end of the prism rod is connected to the prism. The other end of the prism rod is connected to the pressure block. The pressure block is fixed on the bottom plate at a position directly above the intermediate gear. This design not only has high measurement accuracy and high work efficiency, but also has low cost.