CN112378932A - X-ray digital imaging DR (digital radiography) live detection equipment with shielding device - Google Patents
X-ray digital imaging DR (digital radiography) live detection equipment with shielding device Download PDFInfo
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Abstract
The utility model provides a take shield assembly's electrified check out test set of X-ray digital imaging dr, which comprises a frame, X-ray machine and dull and stereotyped probe plate, electrified check out test set still includes first shield shell and second shield shell, first shield shell cover is established in the outside of X-ray machine and dull and stereotyped probe plate, constitute by interior aluminum alloy layer, outer aluminum alloy layer and the lead rubber layer of pressing from both sides between interior aluminum alloy layer and outer aluminum alloy layer, second shield shell cover is established in the X-ray machine outsidely, constitute by first shield layer and wrap up in the second shield layer of establishing in first shield layer outsidely. The X-ray digital imaging dr live detection equipment is provided with two shielding shells, and the composite shielding structure can be used for shielding the X-ray machine with strong electromagnetic waves, so that the X-ray digital imaging dr live detection equipment can hardly receive the interference of the electromagnetic waves in the detection process, and the normal work of the equipment is ensured.
Description
Technical Field
The invention relates to the technical field of strain clamp live-line detection, in particular to X-ray digital imaging DR live-line detection equipment with a shielding device.
Background
The hardware is important equipment of the power transmission line, and the quality of construction quality of the hardware is directly related to safe operation of a power grid. According to statistics of national grid companies and southern grid companies, accidents that wires fall off due to poor construction quality of transmission line hardware occur sometimes, and safe and stable operation of an electric power system is seriously affected, so that defects of the transmission line hardware are accurately detected on site, and timely treatment and replacement of hardware with serious defects are important means for guaranteeing safe operation of the transmission line.
In the construction of the power transmission line, the strain clamp and the splicing sleeve are not qualified and can be hidden troubles for the safe and reliable operation of the line. In recent years, the construction scale of the transmission lines in China is greatly increased, the field construction workload of hardware fittings is huge, effective field detection means is lacked, a large number of transmission lines are erected in remote areas, the terrain and the ground conditions are complex, the transmission lines are difficult to inspect and maintain, so that the transmission line accidents caused by hardware fitting defects are increased day by day, and the safe operation of a power grid and the property loss of the country are directly caused.
The national grid company also clearly puts forward the requirements for carrying out on-site detection on the crimping quality of the transmission line conductors of the crossing points of the transmission lines crossing railways, the first and above highways, the crossing points close to gas stations and the crossing points among the transmission lines with accident risks. The X-ray digital imaging technology is applied to defect detection of transmission conductors and hardware fittings, a more visual, convenient and effective detection method can be provided on the basis of the traditional detection method, and defects of material defects of the transmission conductors, strand breakage of the steel core, strand scattering, inclusion, manufacture and assembly of the hardware fittings and the like can be efficiently and sensitively detected on site.
The strain clamp and the splicing sleeve of the power transmission line are used as important components of the power transmission line hardware fitting, play an important role in bearing mechanical load and electrical load, and are directly related to the safe operation of a power grid in quality and construction process. At present, in the construction of strain clamp and wire connection, a construction method of crimping by a crimping machine is generally adopted. The quality detection after crimping is generally carried out in China by a method of sending inspection to a third-party detection mechanism for detection, the third-party detection mechanism carries out external detection and grip strength test on a sample, when the grip strength of the sample to be sent for inspection is within a designed tension range, the sample is judged to be qualified, and then a construction unit finishes the crimping of the engineering strain clamp and the splicing sleeve according to the crimping method. The method can only detect samples, cannot detect all constructed strain clamps and splicing sleeves one by one, and cannot effectively judge the defects in the strain clamps and splicing sleeves. And because the power failure detection causes great loss for a power grid company, the detection efficiency of the power grid company is reduced, and the detection progress is severely restricted. Therefore, a device for detecting the hardware defect of the power transmission line in live working, which is more intuitive, convenient and effective, is urgently needed to be developed.
Disclosure of Invention
The invention aims to solve the technical problems and provides X-ray digital imaging DR live detection equipment with a shielding device.
In order to solve the technical problems, the invention adopts the technical scheme that: an X-ray digital imaging DR live detection device with a shielding device comprises a rack, an X-ray machine and a flat detection plate, wherein the X-ray machine and the flat detection plate are respectively arranged at two ends of the rack, the ray emission direction of the X-ray machine is perpendicular to the flat detection plate, a hook used for being hung on a power transmission line is arranged on the rack below the flat detection plate, the live detection device further comprises a first shielding shell and a second shielding shell, the first shielding shell is covered outside the X-ray machine and the flat detection plate, the first shielding shell is detachably connected with the rack, the first shielding shell comprises an inner aluminum alloy layer, an outer aluminum alloy layer and a lead rubber layer clamped between the inner aluminum alloy layer and the outer aluminum alloy layer, the side surface of the lead rubber layer in contact with the inner aluminum alloy layer is provided with a plurality of first grooves which are parallel to each other, the side surface of the lead rubber layer in contact with the outer aluminum alloy layer is provided with a plurality of second grooves which, the X-ray detector comprises a first groove, a second groove, a first shielding shell, a second shielding shell, a flat panel detection plate, a first shielding agent, a second shielding agent, a first shielding agent, a second shielding layer, a nickel alloy nano powder, an interlayer between the first shielding layer and the second shielding layer, a lead rubber layer, an inner aluminum alloy layer, an outer aluminum alloy layer and a lead rubber layer, wherein the first groove and the second groove form an included angle of 60-90 degrees, shielding fibers are filled in the first groove and the second groove, the second shielding shell covers the outside of the X-ray detector, the second shielding shell is detachably connected with the first shielding shell, one end, facing the flat panel detection plate, of the second shielding shell is provided with an emission hole, the second shielding shell comprises the first shielding layer and the second shielding layer wrapped outside the first shielding layer, the side faces, opposite to the first shielding layer and the second shielding layer are provided with bulges, the bulges on the first shielding layer and the second shielding layer are staggered with the bulges, the second shielding layer is made of ceramic materials, and shielding paint is sprayed on the outer portion of the second shielding layer.
The X-ray digital imaging DR live detection equipment with the shielding device is further optimized as follows: and an included angle of 75 degrees is formed between the first groove and the second groove.
The X-ray digital imaging DR live detection equipment with the shielding device is further optimized as follows: the depth of the first groove and the depth of the second groove are both 1/4-1/3 of the thickness of the lead rubber layer.
The X-ray digital imaging DR live detection equipment with the shielding device is further optimized as follows: the content of lead in the lead rubber layer is not lower than 60%.
The X-ray digital imaging DR live detection equipment with the shielding device is further optimized as follows: the shielding fiber contains barium sulfate with the weight percentage not less than 40%.
The X-ray digital imaging DR live detection equipment with the shielding device is further optimized as follows: the shielding agent is a mixture of aluminum powder and copper powder in a ratio of 1:1-1: 3.
Advantageous effects
The X-ray digital imaging DR live detection equipment is used for detecting the hardware fitting defects of the power transmission line, can detect the line under the condition of electrification, and is provided with two shielding shells, wherein the first shielding shell covers the outer parts of an X-ray machine and a flat plate detection plate, and the shells consist of an inner aluminum alloy layer, an outer aluminum alloy layer and a lead rubber layer clamped between the inner aluminum alloy layer and the outer aluminum alloy layer, so that the basic shielding of the whole equipment can be formed, and the radiation of X-rays in the detection process is reduced. In order to enhance the shielding effect of the first shielding shell, grooves are respectively formed in two side faces of the lead rubber layer, and shielding fibers in the grooves can obviously improve the shielding effect of the first shielding shell through cross interference of the grooves in two sides. Wherein, the outside at the X-ray production apparatus is established to the second shield shell cover, and the second shield shell has X ray and the dual shielding of electromagnetic wave, and this casing has two shielding layers, is equipped with the arch between two shielding layers, and protruding intussuseption is filled with shielding agent, and protruding periphery is filled with nickel alloy nanometer powder, and this kind of compound shielding structure can carry out the electromagnetic wave shielding of high efficiency to the X-ray production apparatus, makes it can not receive electromagnetic wave interference at the testing process almost, guarantees the normal work of equipment.
Drawings
FIG. 1 is a schematic structural diagram of a charged detection device according to the present invention;
FIG. 2 is a schematic diagram of an internal structure of a first shielding shell in the live line detection apparatus of the present invention;
FIG. 3 is a schematic diagram of the internal structure of a second shielding shell in the live line detection device according to the present invention;
the labels in the figure are: 1. the X-ray detector comprises a rack, 2, an X-ray machine, 3, a flat probe plate, 4, a hook, 5, a first shielding shell, 6, a second shielding shell, 5-1, a first groove, 5-2, a second groove, 6-1, a first shielding layer, 6-2, a second shielding layer, 6-3 and a protrusion.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in the figure: the utility model provides a take shield assembly's electrified check out test set of X-ray digital imaging DR, includes frame 1, X-ray machine 2 and dull and stereotyped probe plate 3, and X-ray machine 2 and dull and stereotyped probe plate 3 set up respectively at the both ends of frame 1, and X-ray machine 2's ray emission direction and dull and stereotyped probe plate 3 mutually perpendicular are provided with on the frame 1 that is located dull and stereotyped probe plate 3 below and are used for the couple 4 of carry on transmission line.
The electrified detection equipment further comprises a first shielding shell 5 and a second shielding shell 6, wherein the first shielding shell 5 covers the X-ray machine 2 and the flat detection plate 3, the first shielding shell 5 is detachably connected with the rack 1, the first shielding shell 5 comprises an inner aluminum alloy layer, an outer aluminum alloy layer and a lead rubber layer clamped between the inner aluminum alloy layer and the outer aluminum alloy layer, and the content of lead in the lead rubber layer is not lower than 60%.
The side face, contacting the lead rubber layer and the inner aluminum alloy layer, of the lead rubber layer is provided with a plurality of first grooves 5-1 which are parallel to each other side by side, the side face, contacting the lead rubber layer and the outer aluminum alloy layer, of the lead rubber layer is provided with a plurality of second grooves 5-2 which are parallel to each other side by side, an included angle of 75 degrees is formed between each first groove 5-1 and each second groove 5-2, and the depths of the first grooves 5-1 and the second grooves 5-2 are 1/4-1/3 of the thickness of the lead rubber layer. The first groove 5-1 and the second groove 5-2 are filled with shielding fibers.
The shielding fiber contains barium sulfate with weight percentage not less than 40%. The shielding fiber can be prepared by the fiber product prepared in the prior art (CN 200710042057.8). The preparation method comprises the following steps:
raw materials: polyethyleneOlefin powder material, molecular weight: 2X 106. The solvent of barium sulfate and polyethylene powder (wt% 50: 50) is white oil.
Dosing according to the concentration of the solution of 10 percent. Swelling time 45 minutes, temperature: at 100 ℃.
Double-spiral zone temperature: a section of area: 175 ℃; a second section: 185 ℃ of temperature; three-stage zone 188 ℃.
Temperature of the booster pump: 170 ℃ and 85kg/cm pressure.
Pressure of the spinning assembly: 75kg/cm 2.
Temperature of the coagulation bath: -6 ℃. Primary stretching ratio: 2.75, the stretching temperature is 65 ℃, and the stretching speed is 60 m/min. The extract was xylene and extracted for 3.5 minutes. The second-stage stretching ratio is 2.95 times, the stretching temperature is 95 ℃, the third-stage stretching ratio is 3.4 times, and the stretching temperature is 135 ℃. Hot air shaping at 125 ℃. The PE monofilament diameter is measured to be 0.45mm, and the fiber strength is measured to be: 15.3 cN/dteX; modulus: 152 cN/dteX; elongation: 5 percent. PVA monofilament diameter was measured: 0.45mm, strength: 2.2 cN/dteX; modulus 31 cN/dteX; elongation 18%.
The second shielding shell 6 covers the outside of the X-ray machine 2, the second shielding shell 6 is detachably connected with the first shielding shell 5, one end, facing the flat panel detection plate 3, of the second shielding shell 6 is provided with an emission hole, the second shielding shell 6 consists of a first shielding layer 6-1 and a second shielding layer 6-2 wrapped outside the first shielding layer 6-1, the opposite side surfaces of the first shielding layer 6-1 and the second shielding layer 6-2 are respectively provided with a bulge 6-3, the bulges 6-3 on the first shielding layer 6-1 and the bulges 6-3 on the second shielding layer 6-2 are arranged in a staggered mode, a shielding agent is arranged in the bulges 6-3, and the shielding agent is a mixture of aluminum powder and copper powder in a ratio of 1:1-1: 3. The interlayer between the first shielding layer 6-1 and the second shielding layer 6-2 is filled with nickel alloy nano powder, the first shielding layer 6-1 comprises an inner aluminum alloy layer, an outer aluminum alloy layer and a lead rubber layer clamped between the inner aluminum alloy layer and the outer aluminum alloy layer, and the content of lead in the lead rubber layer is not lower than 60%. The second shielding layer 6-2 is made of ceramic materials, and shielding paint is sprayed on the outer portion of the second shielding layer 6-2.
The shielding coating can be prepared by adopting a coating prepared in the prior art (CN201710239885.4), and the specific method comprises the following steps:
weighing the materials according to the following weight ratio
40 parts of water-soluble polyurethane resin; 8 parts of carbon-coated nano electromagnetic wave shielding agent; 36 parts of copper powder; 3 parts by weight of 1, 2-bis (trifluoromethanesulfonyloxy) tetramethyldisilane; 10 parts of wetting agent terpineol; 42 parts of water; 4 parts of silicon carbide whisker; 67 parts by weight of ethanol;
the preparation method of the carbon-coated nano electromagnetic wave shielding agent comprises the following steps:
1) adding 3 parts by weight of d-camphorsulfonic acid into 100 parts by weight of water, adding 20 parts by weight of corn starch, and heating at 40-60 ℃ for 12 hours;
2) adding 4 parts by weight of NiSO4 & 6H2O into the solution in the step 1), stirring for 2-3 hours, and then drying for 6-8 hours at 110-;
3) after drying, calcining at the temperature of 420-450 ℃ to obtain a carbonized chiral nickel substance;
4) crushing the carbonized chiral nickel substance to the particle size of less than 2 microns, dispersing the crushed carbonized chiral nickel substance in a proper amount of water, then dropwise adding 2 parts by weight of methanol solution of sodium borohydride into the water, and stirring the solution for 2 to 3 hours at the temperature of 40 ℃ and the rotation speed of 800-1200rpm after the dropwise adding is finished; the weight ratio of sodium borohydride to methanol in the methanol solution of sodium borohydride is 1: 4;
5) drying at 110-120 ℃, and calcining at 300-320 ℃ in air atmosphere for 4-5h to obtain the nano electromagnetic wave shielding agent.
The electromagnetic wave shielding coating was prepared according to the following preparation method:
1) adding metal powder and silicon carbide whiskers into ethanol, uniformly mixing and dispersing;
2) adding 1, 2-bis (trifluoromethanesulfonyloxy) tetramethyldisilane into the step 1), and uniformly mixing to obtain a component A;
3) uniformly mixing water-soluble polyurethane resin, a carbon-coated nano electromagnetic wave shielding agent, a wetting agent terpineol and water to form a component B;
4) mixing the component A and the component B uniformly, and then grinding the mixture in a grinder at a high speed until the viscosity is 30-40S to obtain the electromagnetic wave shielding coating.
The X-ray digital imaging DR live detection equipment is used for detecting the hardware fitting defects of the power transmission line, can detect the line under the condition of electrification, and is provided with two shielding shells, wherein the first shielding shell is covered outside an X-ray machine and a flat panel detection plate, the shell is provided with an inner shielding layer with a basic shielding measure, and the inner shielding layer consists of an inner aluminum alloy layer, an outer aluminum alloy layer and a lead rubber layer clamped between the inner aluminum alloy layer and the outer aluminum alloy layer, so that the basic shielding of the whole equipment can be formed, and the radiation of X-rays in the detection process is reduced. In order to enhance the shielding effect of the first shielding shell, grooves are respectively formed in two side faces of the lead rubber layer, and shielding fibers in the grooves can obviously improve the shielding effect of the first shielding shell through cross interference of the grooves in two sides. Wherein, the outside at the X-ray production apparatus is established to the second shield shell cover, and the second shield shell has X ray and the dual shielding of electromagnetic wave, and this casing has two shielding layers, is equipped with the arch between two shielding layers, and protruding intussuseption is filled with shielding agent, and protruding periphery is filled with nickel alloy nanometer powder, and this kind of compound shielding structure can carry out the electromagnetic wave shielding of high efficiency to the X-ray production apparatus, makes it can not receive electromagnetic wave interference at the testing process almost, guarantees the normal work of equipment.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (6)
1. The utility model provides a take shield assembly's electrified check out test set of X-ray digital imaging DR, includes frame (1), X-ray machine (2) and dull and stereotyped detecting plate (3) set up respectively at the both ends of frame (1), the ray emission direction and dull and stereotyped detecting plate (3) mutually perpendicular of X-ray machine (2), be provided with on frame (1) that is located dull and stereotyped detecting plate (3) below and be used for hanging couple (4) on transmission line, its characterized in that: the electrified detection equipment further comprises a first shielding shell (5) and a second shielding shell (6), wherein the first shielding shell (5) covers the X-ray machine (2) and the flat panel detection plate (3), the first shielding shell (5) is detachably connected with the machine frame (1), the first shielding shell (5) consists of an inner aluminum alloy layer, an outer aluminum alloy layer and a lead rubber layer clamped between the inner aluminum alloy layer and the outer aluminum alloy layer, a plurality of parallel first grooves (5-1) are arranged on the side surface of the lead rubber layer in contact with the inner aluminum alloy layer side by side, a plurality of parallel second grooves (5-2) are arranged on the side surface of the lead rubber layer in contact with the outer aluminum alloy layer side by side, an included angle of 60-90 degrees is formed between the first groove (5-1) and the second grooves (5-2), and shielding fibers are filled in the first groove (5-1) and the second groove (5-2), the second shielding shell (6) is covered outside the X-ray machine (2), the second shielding shell (6) is detachably connected with the first shielding shell (5), one end of the second shielding shell (6) facing the flat panel detection plate (3) is provided with an emission hole, the second shielding shell (6) consists of a first shielding layer (6-1) and a second shielding layer (6-2) wrapped outside the first shielding layer (6-1), the opposite side surfaces of the first shielding layer (6-1) and the second shielding layer (6-2) are respectively provided with a bulge (6-3), the bulges (6-3) on the first shielding layer (6-1) and the bulges (6-3) on the second shielding layer (6-2) are arranged in a staggered manner, and a shielding agent is arranged in the bulges (6-3), the interlayer between the first shielding layer (6-1) and the second shielding layer (6-2) is filled with nickel alloy nano powder, the first shielding layer (6-1) comprises an inner aluminum alloy layer, an outer aluminum alloy layer and a lead rubber layer clamped between the inner aluminum alloy layer and the outer aluminum alloy layer, the second shielding layer (6-2) is made of ceramic materials, and shielding paint is sprayed on the outer portion of the second shielding layer (6-2).
2. The X-ray digital imaging DR live detection apparatus with shielding device of claim 1, wherein: an included angle of 75 degrees is formed between the first groove (5-1) and the second groove (5-2).
3. The X-ray digital imaging DR live detection apparatus with shielding device of claim 1, wherein: the depth of the first groove (5-1) and the depth of the second groove (5-2) are 1/4-1/3 of the thickness of the lead rubber layer.
4. The X-ray digital imaging DR live detection apparatus with shielding device of claim 1, wherein: the content of lead in the lead rubber layer is not lower than 60%.
5. The X-ray digital imaging DR live detection apparatus with shielding device of claim 1, wherein: the shielding fiber contains barium sulfate with the weight percentage not less than 40%.
6. The X-ray digital imaging DR live detection apparatus with shielding device of claim 1, wherein: the shielding agent is a mixture of aluminum powder and copper powder in a ratio of 1:1-1: 3.
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