1086 results about "Porcelain insulator" patented technology

The invention relates to a porcelain insulator insulation state evaluation method based on solar-blind ultraviolet imaging image features. The porcelain insulator insulation state evaluation method comprises the steps of: acquiring a facula area sequence through calculating facula areas of continuous image frames in an UV video; extracting three quantization parameters including a facula area average value, a facula area mean square error and a large facula area frequentness of the facula area sequence by adopting an statistical analysis method; acquiring cluster centers in four insulating states such as good, poor, bad and very bad by adopting a fuzzy clustering algorithm; and then partitioning the insulation state of an insulator to be distinguished based on a minimum-distance criterion. According to the porcelain insulator insulation state evaluation method, the three feature parameters of the facula area sequence are regarded as feature quantities, the cluster centers in four insulating states can be obtained by adopting the FCM algorithm, the insulation state of an unknown sample is judged according to the Euclidean distance from the unknown sample to each cluster center, the quantization problem of ultraviolet imaging detection results is effectively solved, and a reliable basis can be provided for the maintenance or replacement of polluted insulators.

The invention discloses a method for preparing a porcelain insulator surface super-hydrophobic coating, which takes ethyl orthosilicate as a presoma and absolute ethyl alcohol as flux, and comprises the following steps: preparing silicon dioxide sol through alkaline catalysis, and adding a silane coupling agent to perform the modification treatment; after the porcelain insulator surface is subjected to the cleaning treatment, dipping in the modified silicon dioxide sol for film coating through the czochralski method to form a primary coating and to obtain a micro-nanometer grade coarse structure which is similar to taro leaf; after drying, dipping in addition type liquid silicon rubber sol for secondary film coating through the czochralski method, and then placing into an oven for heat treatment at a temperature of 100-120 DEG C; and obtaining a transparent super-hydrophobic coating after subjecting the primary coating with the micro-nanometer coarse structure to the secondary film coating modification by the liquid silicon rubber with low surface energy.

A spark plug is provided which is designed to be compact without sacrificing a mechanical strength of a porcelain insulator. The spark plug includes a metal shell having a base end and a top end. The porcelain insulator is made of a hollow cylinder which includes a body and an insulator head. The body is retained within the metal shell. The insulator head extends from the base end of the metal shell in a lengthwise direction of the porcelain insulator and has a length made up of a major body leading to the body of the porcelain insulator and an end portion lying far away from the body. The major body has an outer diameter D1, an inner diameter D2, and a section modulus Z at a smallest-outer diameter portion thereof which meet relations of 7.1 mm≦D1≦8.8 mm, D2≧2.8 mm, and Z≧33 mm³.

The invention relates to a method for detecting factors influencing a mechanical life of a support porcelain insulator. The method for detecting the factors influencing the mechanical life of the support porcelain insulator comprises the following steps: step 1, support porcelain insulator mechanical performance measurable indicators and life influencing factors which are planned to conduct quantitative evaluation are confirmed; step 2, a level range is chosen so as to generate a factor level execution table according to the influencing factors; step 3, orthogonal tables capable of inspecting each level of the factors are chosen, and orthogonal test steps are confirmed; step 4, relative tests according to required test conditions of each test number are carried out in sequence, and test data are recorded; step 5, the test data are analyzed, optimal factor combinations and a primary and secondary sequence of each influencing factor are confirmed, and whether influences of functions of each factor upon indicators are notable or not is judged; and step 6, a model for quantitative evaluation of the factors affecting the mechanical life of the support porcelain insulator is built according to test results. The method for detecting the factors influencing the mechanical life of the support porcelain insulator has the advantages of reducing test numbers, improving test subject utilization rate, and obtaining the rule of influence of each factor upon the indicators accurately.

A spark plug for an internal combustion engine is provided which includes a hollow cylindrical metal shell with an open end portion to be exposed to a combustion chamber of the engine, a ground electrode joined to the metal shell, a center electrode disposed in the metal housing to define a spark gap between itself and the ground electrode. The spark plug also includes a stream shaper or a stream reflector geometrically formed on the metal shell and/or the porcelain insulator to shape a vortex steam of air-fuel mixture into a stream thereof which is oriented outside the spark plug or serves to decrease the amount of the air-fuel mixture into a pocket between the metal shell and the porcelain insulator. This ensures the stability of ignition of the air-fuel mixture.

The invention discloses a super strength silicate cement adhesive and a preparation method thereof. The adhesive is mainly prepared from the following raw materials in percentage by weight: 30 to 40 percent of cement, 25 to 43 percent of quartz sand, 9 to 24 percent of micro aggregates, 0.9 to 2 percent of water reducing agent and 11 to 14 percent of water. The preparation method comprises the following steps of firstly, uniformly mixing the cement, the micro aggregates, the water reducing agent and the quartz sand, then continuously stirring for 4 minutes and immediately forming after taking out the mixture; after the obtained product is formed, placing the obtained product into a curing box at the temperature of 35 DEG C to carry out steaming-curing under the humidity of not lower than 95 percent, demoulding after 4 to 12 hours, and placing a demoulding specimen into hot water at the temperature of 45 to 80 DEG C to carry out curing for 48 to 96 hours; and finally, testing the qualification of the product to obtain the cement adhesive. The cement adhesive disclosed by the invention has the excellent performances of excellent compaction, high strength, excellent durability and the like, is suitable for electrotechnical porcelain products such as a high-tonnage suspension type porcelain insulator and the like and has low cost.

A spark plug for an internal combustion engine is provided which includes a metal shell, a porcelain insulator, a center electrode, a main ground electrode, and auxiliary ground electrodes. Each of the auxiliary ground electrodes has an inner side surface facing the center electrode through the porcelain insulator to define an auxiliary spark gap between itself and a nose of the porcelain insulator so as to occupy a minimum distance between the porcelain insulator and the auxiliary ground electrode. This avoids a great local increase in electrical field strength on the auxiliary ground electrode to minimize excessive discharge within the auxiliary spark gap to enhance carbon fouling resistance and durability of the spark plug.

The invention discloses a detection device, method and system for internal defects of a ceramic insulator. The method comprises the following steps: applying a light pulse heat excitation function toa ceramic insulator to be tested by using a light pulse heat excitation loading device; acquiring infrared thermal image sequences on the surface of the ceramic insulator to be tested by using an infrared thermal image acquisition device, and carrying out preprocessing such as fitting, compression and reconstruction on the acquired infrared thermal image sequences by using a data processor; according to defect information provided by original infrared heat image sequences obtained through preprocessing, analyzing and comparing data in a characteristic database, so as to obtain defect types andquantitative calculation results of the ceramic insulator. By adopting the detection device, the light pulse heat excitation function is applied to the surface of the ceramic insulator, defect typesare judged and defect information is analyzed according to variations of dynamic temperature fields on the surface of the ceramic insulator, the detection device has the characteristics of rapid measurement, large single-time measurement areas, visible measurement results, non contact, and the like, and related information of internal defects of the ceramic insulator can be accurately, comprehensively and deeply processed and analyzed.

The method comprises: 1) selecting the type of the insulator; 2) measuring the sound speed; 3) selecting the probe; 4) crank detection; 5) automatically tracing; 6) comparing the wave forms; 7) displaying the detection result. By making the intellectualized modification for the original supersonic detector, the invention enhances the detection function and reduces the program for adjusting the metering device.

The invention provides a method, a device and a system for detecting a crack of an insulator. The method comprises the steps of acquiring response signals of a porcelain insulator to be detected and a crack-free porcelain insulator in a modal analysis experiment; establishing a finite element model of the porcelain insulator to perform modal analysis to the porcelain insulator according to the physical property of the porcelain insulator; determining the inherent frequencies of the porcelain insulator to be detected and the crack-free porcelain insulator according to the response signals of the porcelain insulator to be detected and the crack-free porcelain insulator and the finite element model respectively; and determining the crack position of the porcelain insulator to be detected according to the relation of the inherent frequencies of the porcelain insulator to be detected and the crack-free porcelain insulator, the inherent frequency of the porcelain insulator, acquired in advance, and the crack position. According to the invention, the finite element model of the cracked porcelain insulator is established to analyze the influence of different crack positions and crack sizes on the inherent frequency of the porcelain insulator, so that the purpose of detecting the crack of the porcelain insulator is achieved, and the safety and the reliability of the porcelain insulator are improved.

A spark plug is disclosed as including a metal shell 10 formed with first and second bores 10c, 10d and a stepped section 10e between the first and second bores, and a porcelain insulator 20 having a largest-diameter section 20d, which is accommodated in the first bore and a small-diameter section 20e accommodated in the second bore. The first and second bores of the metal shell have a dimensional relationship, lying in a value equal to or less than 1.8 mm, which is expressed as (D1−D2)/2 where D1 represents an inner diameter of the first bore of the metal shell and D2 represents an inner diameter of the second bore of the metal shell.

The invention discloses a single-hook lifting device for a switch blade porcelain insulator. The single-hook lifting device comprises a lifting hook, a power mechanism, a suspension arm, a first support rod, a limitator, a first fixing device, a second support rod and a cross rod, wherein one end of the second support rod is vertically fixed on a switch blade bracket through the first fixing device; two ends of the cross rod are fixed on two switch blade constant-diameter rods, and the cross rod is fixed with the other end of the second support rod; the lower end of the first support rod is inserted into the second support rod, and is fixed with the second support rod through the limitator; one end of the suspension arm is rotationally fixed at the top end of the first support rod through a bearing; and the power mechanism is fixed at the end part of the other end of the suspension arm, and the lifting hook is arranged on the power mechanism. The single-hook lifting device can be used in a finite space, is simple and convenient to adjust in height, ensures the safety and the reliability in lifting the switch blade porcelain insulator, has a high operating efficiency, and solves the difficult problem that lifting cannot be carried out since the safety distance between a crane and electrified equipment on a reformation site is not long enough.

The invention discloses a preparation method of high-strength electroceramic. The preparation method includes the specific technological steps that 1, the high-strength electroceramic is prepared from, by mass, 20-30 parts of calcined bauxite, 20-30 parts of mullite, 20-35 parts of high plastic clay and 15-25 parts of feldspar; 2, after all raw materials in step 1 are mixed, water is added, ball-milling is conducted, and slurry is obtained; 3, the slurry is subjected to sieving and iron removal, and mud cakes are obtained after pressure filtration dehydration; 4, the mud cakes are subjected to aging for over 24 hours after coarse milling, then the mud cakes are extruded into electrical porcelain wet billets of the required sizes through a vacuum deairing machine, and green bodies are obtained through fettling and drying; 5, the green bodies are placed in a drawer type or tunnel type kiln and sintered at the temperature of 1260-1330 DEG C for 24-48 hours; then cooling is conducted, and high-strength electroceramic products are output from the kiln. The high-strength electroceramic material is wide in raw material source, good in process performance, low in manufacturing cost and particularly suitable for being used for manufacturing high-strength porcelain insulators used for extra-high voltage and super-high voltage power transformer lines and power stations.

A spark plug for an internal combustion engine and related manufacturing method are disclosed having a metal shell, a porcelain insulator, a center electrode and a ground electrode. The center electrode includes a substantially columnar shaped base material body, and a substantially square shaped rod-like Ir alloy tip bonded to a leading end portion of the base material body. The leading end portion has a diameter D2 smaller than a diameter D1 of the base material body. The Ir alloy tip has a square shape with a long diagonal line supposed to form a diameter A of a circumscribed circle C_A of the Ir alloy tip whose inscribed circle C_B is coaxial with the circumscribed circle C_A and has a diameter B, with four diameters A, B, D1 and D2 lay in the relationship expressed as D1>A>D2>B.

An alumina compound sintered compact, having a principal component of alumina, a method of manufacturing the same, and a spark plug employing such an alumina compound sintered compact are disclosed. The alumina compound sintered compact contains alumina, mullite, zircon, zirconia and a specified metal oxide composed of an oxide of at least one element selected from Group III elements excepting Mg, Ca, Sr, Ba and actinoid, wherein the alumina compound sintered compact contains 0.5 to 10 total parts by weight of mullite, zircon and zirconia, 0.5 to 10 parts by weight of the specified metal oxide and a balance of substantially alumina based on 100 parts by weight in total. The spark plug for an internal combustion engine includes a porcelain insulator made of the alumina compound sintered compact.

A spark plug is disclosed as having a metal shell, a porcelain insulator fixedly secured to the metal shell, a center electrode and a ground electrode providing a spark discharge gap with the center electrode. The porcelain insulator has a through-bore partially exposed from an end face of the ground electrode in a surface area S1, as viewed from a distal end of the spark plug, and having a total surface area S2 falling in the relationship S1/S2≦0.3. The center electrode protrudes from the porcelain insulator with a protruding length L under the relationship L≦0.6 mm. A minimal value Hmin and a maximal value Hmax in distance between the ground electrode and the end face of the porcelain insulator lies in the relationship Hmax/Hmin≦1.3. Wall thickness T between the through-bore and an outer periphery of the porcelain insulator lies in the relationship T≦0.7 mm.

The invention discloses a preparation method of rod porcelain insulator. The preparation method comprises the following working procedures: raw material ball milling, sieving and deironing, spray drying and pelleting, isostatic forming, fettling, glazing and firing, wherein the working procedure of firing comprises a low temperature stage, an oxygenolysis stage, a high temperature stage and a cooling stage, and the cooling stage of the working procedure of firing comprises a specific cooling process. The preparation method disclosed by the invention is simple in operation, and interior stress of the rod porcelain insulator can be effectively removed.

The invention belongs to measuring devices for high-voltage appliances, and particularly relates to an insulation test device for a porcelain insulator. The insulation test device comprises ropes and rods, capable of being fixed to the insulator, of a megger test probe. The insulation test device comprises a first vertical supporting rod and a second vertical supporting rod. The first vertical supporting rod is connected with one end of a horizontal supporting rod through a universal ball, pulleys are arranged on two sides of the body of the horizontal supporting rod, the other end of the horizontal supporting rod is connected with the second vertical supporting rod, and an upper clamp ring and a lower clamp ring are respectively arranged at the upper end and the lower end of the second vertical supporting rod. Each clamp ring consists of two semicircular rings connected by springs, one end of each semicircular ring is connected with the second vertical supporting rod, and measuring heads are arranged on the inner walls of the ends of the semicircular rings and are connected with the megger. Pins are arranged on the outer walls of the semicircular rings and connected with one ends of the ropes, and the ropes are wound on the pulleys. The other ends of the ropes are connected with a take-up device arranged on the first vertical supporting rod. The insulation test device can be used for rapid and effective insulation test of single insulators forming a porcelain insulator string.