34results about How to "Improve wind and sand resistance" patented technology

The invention discloses an electrified railway-used bar-shaped column type porcelain polymer composite insulator. The composite insulator comprises a porcelain core bar with more than one porcelain umbrella skirt. Two ends of the porcelain core bar are adhered with metal fittings via an adhering agent. The external surface of the porcelain core bar is covered with a polymer sheath with more than one polymer umbrella skirt. The surface of the porcelain core bar is processed via a coupling agent. The sheath and the umbrella skirt are solidified via high temperature and formed in one step on the porcelain core bar via an overall injection or pouring process. The umbrella skirt on the sheath comprises more than one large umbrella-shaped protrusion which is coaxially arranged with the porcelain core bar. The umbrella of the large umbrella-shaped protrusion is from 30mm to 60mm after the umbrella stretches out. The electrified railway-used bar-shaped column type porcelain polymer composite insulator which is pollution-flashover-resistant, bird-pecking-resistant and wind-and-sand-resistant is high in pollution flashover voltage so that crack and break in the process of using can be prevented. Meanwhile, the electrified railway-used bar-shaped column type porcelain polymer composite insulator has characteristics of being bird-trouble-resistant, wind-and-sand-resistant, external-force-damage-resistant and assistant in climbing and stepping.

The invention relates to a ratchet wheel angle monitoring device for an overhead contact mesh system. The ratchet wheel angle monitoring device comprises a shell body mounted on a ratchet compensation bracket, an angle sensor and an anti electromagnetic interference circuit are arranged inside the shell body, wherein the angle sensor adopts an accelerometer; the angle sensor is connected and communicated with an aggregator mounted on a support of a compensation lower anchor through a soft cable. According to the ratchet wheel angle monitoring device for the overhead contact mesh system, accurate measurement of ratchet angle data can be achieved, collected data can be transmitted to the aggregator, uniform analysis of the data by an operation management organization is facilitated, the safety hidden trouble of the overhead contact mesh system can be discovered in time and eliminated, and the reliability and safety of a traction power supply system are greatly improved. The product is simple in structure and easy to use, the technical effects are remarkable, the device can be widely used in occasions of online monitoring product design of a ratchet wheel compensation lower anchor device of the overhead contact mesh, and the requirements for the field environment work of the overhead contact mesh system are met.

The invention discloses a cementing type double-umbrella-shaped and three-umbrella-shaped suspension type polymer composite string insulator unit. The polymer composite string insulator unit comprises a steel cap metal element, a steel foot metal element, an insulating core element, a polymer protective sleeve and a polymer skirt. A cavity with a U-shaped section is formed in the steel cap metal element, the steel foot metal element is provided with a cone head portion matched with the cavity, the cone head portion of the steel foot metal element is arranged in the cavity of the steel cap metal element, the insulating core element is arranged between the cone head portion and the cavity, the center of the insulating core element is provided with a cementing portion which is a cavity of an inverted cone shape, the polymer protective sleeve wraps the outer surface of the insulating core element, the polymer skirt of a double-umbrella-shaped or three-umbrella-shaped structure is disposed on the outer surface of the polymer protective sleeve, the cone head portion of the steel foot metal element is integrated with the cementing portion in a cementing mode through an adhesive, and the cavity of the steel cap metal element is integrated with the cementing portion in a cementing mode through an adhesive. The polymer string insulator unit has the advantages of preventing bird damages, and being resistant to wind and sand, resistant to damages caused by external force and capable of assisting climbing.

The invention belongs to the technical field of power insulation equipment, and particularly relates to a hard composite insulator and a preparation method thereof. The hard composite insulator comprises an insulating core rod, hardware fittings, a hard sheath and a hard umbrella skirt. The hardware fittings are arranged at the two ends of the insulating core rod; the hard sheath covers the outersurface of the insulating core rod and extends to the surface of the fitting to form sealing. The hard umbrella skirt is arranged on the hard sheath. The hard umbrella skirt comprises more than one large umbrella-shaped bulge which is coaxially arranged with the insulating core rod. The preparation raw materials of the hard umbrella skirt and the hard sheath are the same, and at least comprise silicone rubber and / or plastic. According to the composite insulator, the bird pecking damage resistance, the sand wind resistance, the external force damage resistance and the aging resistance of the composite insulator are improved, the probability that the insulating core rod is exposed in the atmospheric environment is further reduced, the insulating core rod cannot be brittle failure due to external corrosion, and brittle failure accidents can be prevented in the using process of the composite insulator.

The invention relates to an overhead line system balance weight position monitoring device. The overhead line system balance weight position monitoring device comprises a shell, the shell is installed at the position, above a balance weight string, of a support in a hoisted mode, a displacement sensor, a battery, an internally-arranged antenna, a communication circuit and a collection circuit are installed in the shell, and the displacement sensor rightly faces the top surface of the balance weight string. According to the overhead line system balance weight position monitoring device, position change of the balance weight string can be monitored in real time, collected data are transmitted to a data center through wireless data transmission, unified data analysis by an operations management organization is facilitated, potential safety hazards of an overhead line system can be found timely and eliminated, the reliability and the safety of a tractive power supply system can be enhanced greatly, and the driving operation safety is ensured; and the product is simple in structure and easy to use, obvious in technical effect and capable of being widely applied to the occasions of design of overhead line system anchoring compensator on-line monitoring products, and meets the work requirements for the overhead line system in the field environment.

The invention provides an air-conditioning ventilation system for a rail passenger car and the rail passenger car. The system comprises an air-conditioning unit arranged under the car, an air supplying channel arranged at the car top, a vertical mixed air channel and a vertical air supplying channel, wherein an air inlet communicated with the outside of a car body and an air return port communicated with the inside of the car body are formed in the upper part of the vertical mixed air channel; the lower part of the vertical mixed air channel is communicated with the air-conditioning unit; and two ends of the vertical air supplying channel are communicated with the air supplying channel and the air-conditioning unit respectively. Air outside the car and return air inside the passenger car are mixed in the vertical mixed air channel and then enter the air-conditioning unit to be cooled or heated, and cooled or heated air enters the vertical air supplying channel and finally enters a passenger car room through the air supplying channel at the car top. A fresh air inlet and an air return port of the air-conditioning unit are formed in the vertical mixed air channel, and the vertical mixed air channel can be arranged inside the car, so that blown sand and particulate matters on a rail surface can be prevented from entering the air-conditioning unit, the blown sand resistance of the air ventilation system is improved, washing times of a filter screen are reduced, the replacement period is prolonged, and spaces at the car top and under the car are effectively used.

The invention discloses a wolfberry drip irrigation cultivation method achieving double-layer cross straw covering, and belongs to the technical field of water saving drip irrigation cultivation in arid and semi-arid regions. According to the water saving drip irrigation method, aiming at soil and climate characteristics in the arid and semi-arid regions, by adopting the measures of wolfberry cutting seedling treatment, efficient furrow rainwater collection, drip irrigation cultivation in a furrow, drip irrigation system optimization and double-layer cross covering of crushed wheat straw and corn straw, the rainfall and irrigation water utilization rate is increased, and invalid waste of the water resource is reduced. Compared with a traditional wolfberry flood irrigation cultivation method, the total output is increased by 15.13%, the super fruit rate is increased by 13.6%, a C-class fruit rate is lowered by 4.6%, and the dry fruit average hundred-grain weight is increased by 14.44%;the protein content is increased by 2.53%, the polysaccharide content is increased by 10.42%, and the carotenoid content is increased by 45.169 mg / 100 g.

The invention discloses a facility for treating desertification land and with an improved structure, and relates to the field of improvement equipment for desertification land. The facility comprisesan assembled greenhouse, a greenhouse frame is arranged in the assembled greenhouse, an inlet and outlet is formed in the front portion of the assembled greenhouse, and several ground grasping pins are arranged below the greenhouse frame; vertical hollow grooves are formed in the centers inside the ground grasping pins, bolts penetrate through the vertical hollow grooves, several placement groovesare formed in the two sides of each ground grasping pin, conical ground grasping nails are arranged inside the placement grooves, and internal horizontal grooves are horizontally formed in the conical ground grasping nails. According to the facility, the greenhouse frame can be more firmly fixed to the ground, and the conical ground grasping nails in the ground grasping pins can go deep into theground by simply screwing the bolts; the conical ground grasping nails dispersed into the ground firmly grasp the ground like tree roots, in this way, the phenomenon that the greenhouse frame is blownto be collapsed by wind due to poor fixity is avoided, and the wind resistance of the facility under severe weather is improved.

The invention discloses a green corridor type regulating and storing system of a wandering river in an arid area. The green corridor type regulating and storing system includes a river channel regulating and storing belt arranged on a riverbed and slope stabilization belts arranged on river banks on the two sides. The river channel regulating and storing belt comprises aquatic vegetation, a cobblestone layer, a permeable paving layer, a vegetation planting soil layer and a water storing and collecting layer which are arranged sequentially from top to bottom. Each slope stabilization belt comprises a sand-proofing grid laid on the corresponding river bank and vegetation planted on the corresponding sand-proofing grid. When a flood season comes, the river channel regulating and storing beltin the green corridor type regulating and storing system provides a certain storage space and increases the capacity of flood discharging of a river channel. When a drought period comes, the purpose of recharging ecological base flow is achieved through water resources stored in the river channel regulating and storing belt.

The invention discloses a cementing type bell-shaped disk-shaped suspension type polymer string insulator unit. The polymer string insulator unit comprises a steel cap metal element and a steel foot metal element, wherein a cavity with a U-shaped section is formed in the steel cap metal element, the steel foot metal element is provided with a cone head portion matched with the cavity, the cone head portion of the steel foot metal element is arranged in the cavity of the steel cap metal element, a polymer insulating element is arranged between the cone head portion and the cavity, the polymer insulating element comprises a bell-shaped skirt, the center of the skirt is provided with a cementing portion which is a cavity of an inverted cone shape, the inner wall of a bell-shaped body is provided with a plurality of prismatic protrusions coaxial with the polymer insulating element, the cone head portion of the steel foot metal element is integrated with the cementing portion through an adhesive in a cementing mode, and the cavity of the steel cap metal element is integrated with the cementing portion through an adhesive in a cementing mode. The polymer string insulator unit has the advantages of preventing bird damages, and being resistant to wind and sand, resistant to damages caused by external force and capable of assisting climbing.

The invention discloses padding used for stabilizing roots of plants in desertification regions and a use method thereof. The padding comprises a degradable inner wall, an outer wall, a planting hole and a bottom. A hollow structure between the inner wall and the outer wall and the planting hole are filled with filler made of the same material. The filler is prepared by mixing surrounding sand, sapropel, straw, local soil, humus and a microbial agent according to the volume ratio of 1:2:1:3:2:1. The top of the padding is open, the bottom of the padding is closed, and the planting hole allows the roots and stalks of the plants to penetrate. The filler can provide enough nutrients required by growth and development of the roots of the plants. The loose structure of the filler has a moisture storage function, the moisture retention time of the roots of the plants is prolonged, gas exchange between root systems and outside can be improved, the dissolved oxygen amount of the roots is increased, root respiration is promoted, a guarantee is provided for rooting, development and firm root taking of the root systems, the survival rate of the plants is increased, the vegetation coverage degree is improved, and the ecological functions of wind prevention and sand fixation, soil and water conservation and environment greening of the plants are played to the largest extent.

The invention discloses a cementing type double-umbrella-shaped and three-umbrella-shaped suspension type polymer string insulator unit. The polymer string insulator unit is characterized by comprising a steel cap metal element and a steel foot metal element, wherein a cavity with a U-shaped section is formed in the steel cap metal element, the steel foot metal element is provided with a cone head portion matched with the cavity, the cone head portion of the steel foot metal element is arranged in the cavity of the steel cap metal element, a polymer insulating element is arranged between the cone head portion and the cavity, the polymer insulating element comprises a skirt of a double-umbrella-shaped or three-umbrella-shaped structure, the center of the skirt is provided with a cementing portion which is a cavity of an inverted cone shape, the cone head portion of the steel foot metal element is integrated with the cementing portion in a cementing mode through an adhesive, and the cavity of the steel cap metal element is integrated with the cementing portion in a cementing mode through an adhesive. The polymer string insulator unit has the advantages of preventing bird damages, and being resistant to wind and sand, resistant to damages caused by external force and capable of assisting climbing.

The invention discloses an underground drip irrigation type desert tree planting system which comprises a plurality of pile holes formed in a desert through punching equipment, the pile holes are evenly distributed around plants, a plurality of reamed holes are formed in each pile hole from top to bottom through a special hole reaming device, so that the whole section of each pile hole is in the shape of a long and thin Chinese character 'feng', a hollow pipe is installed in each pile hole, and seepage holes are formed in the positions, at the reamed hole positions, of the pipe body of each hollow pipe. The underground drip irrigation type desert tree planting system is low in cost, can be repeatedly used and degraded, and can sequentially guide plant roots to grow downwards so as to increase the depth of the roots and guide the roots to grow towards the periphery so as to form intertwining, so that the drought tolerance and the wind and sand resistance of the plants are improved, the survival rate of the plants is increased, the plants are connected to form forests, the strategy of continuous promotion can be effectively implemented to radically treat wind and sand and convert desert into forests, the ecological environment can be obviously improved, and more resources can be provided for human beings.

The invention relates to a contact suspension monitoring device for an overhead line system, and the device comprises a collector for monitoring the vibration data of a contact line and a gathering device for monitoring the state data of a carrier cable. The collector is installed on a contact line suspended wire clamp through a screw, and the gathering device is installed on the carrier cable through a clamping hoop. The collector and the gathering device carry out the data transmission through a connection cable or in a wireless communication mode. The device is simple in structure, is easy to use, is remarkable in technical effects, can be widely used for occasions of online monitoring product design of contact suspensions (carrier cables and contact lines), meets the working requirements of the outdoor environment of the overhead line system, achieves the real-time monitoring of the swinging, vibration, current and temperature of the contact suspensions (carrier cables and contact lines) and can provide reliable, accurate and complete monitoring data.

The invention discloses a polymer disc-shaped insulation piece for a disc-shaped suspension type insulator string element and a manufacturing method of the polymer disc-shaped insulation piece, wherein the polymer disc-shaped insulation piece for the disc-shaped suspension type insulator string element comprises an umbrella skirt, a glue mounting portion with a hollow cavity which is in the shape of an inverted cone is arranged in the center of the umbrella skirt, and the polymer disc-shaped insulation piece for the disc-shaped suspension type insulator string element is made of hydrophobic cycloaliphatic epoxy resin. According to the polymer disc-shaped insulation piece for the disc-shaped suspension type insulator string element and the manufacturing method of the polymer disc-shaped insulation piece, the hydrophobic cycloaliphatic epoxy resin is utilized, and therefore the wind and sand resistant ability and the external force damage resistant ability of the polymer disc-shaped insulation piece are enhanced, and damage to the polymer disc-shaped insulation piece due to pecking of birds can be prevented. Meanwhile, engineering personnel can step on the umbrella skirt in a certain range in a construction process when necessary, and therefore construction is benefited, and the safety factor of the engineering personnel in the construction process is increased.

The invention discloses an adhesive binding and suspended type disc-shaped polymer composite insulator chain element with a clock-shell-shaped umbrella shirt. The adhesive binding and suspended type disc-shaped polymer composite insulator chain element comprises a steel cap and a steel leg. A cavity with the U-shaped cross section is formed inside the steel cap. A conical head portion matched with the cavity is arranged on the steel leg. The conical head portion of the steel leg is arranged in the cavity of the steel cap. A polymer insulating piece is arranged between the conical head portion and the cavity. The polymer insulating piece comprises the clock-shell-shaped umbrella shirt. The surface of the umbrella shirt is coated with an RTV stain-proofing coating. An adhesive binding portion is arranged at the center of the umbrella skirt. The adhesive binding portion is an inverted conical cavity. A plurality of prismatic protrusions are arranged on the inner wall of a clock-shell-shaped body, wherein the prismatic protrusions and the polymer insulating piece are coaxial. The conical head portion of the steel leg and the adhesive binding portion are connected into a whole in an adhesive binding mode through adhesives. The cavity of the steel cap and the adhesive binding portion are connected into a whole in an adhesive binding mode through adhesives. The adhesive binding and suspended type polymer insulator chain element can resist bird trouble, sand wind and external damage and can assist in climbing.

The invention relates to the technical field of glass, and discloses solar ultra-white float photo-thermal glass, which is characterized by comprising the following raw materials in parts by weight: 68-75 wt% of SiO2; al2O3: 0.3 wt% to 2.0 wt%; na2O: 12 wt% to 15.5 wt%; k2O: 0 wt% to 2 wt%; caO: 5 wt% to 11 wt%; sb2O3: 0.05 wt% to 0.5 wt%; mgO: 1 wt%-5 wt%; li2O: 0.1 wt% to 2.0 wt%; fe2O3: 1t; 0.01 wt% of the total weight; sO3: 0 wt% to 1 wt%; raw materials for forming the components comprise low-iron quartz sand, dolomite, limestone, aluminum hydroxide, mirabilite, sodium carbonate, potassium carbonate and sodium pyroantimonate. On the basis of common low-iron sodium-calcium silicate, various conventional sodium-calcium silicate components are optimized, the contents of CaO, MgO and Al2O3 are limited, and meanwhile, a small amount of new components such as Li2O, K2O and Sb2O3 are introduced into the glass to meet the requirements of a photo-thermal power generation glass substrate, so that the requirements of high transmittance and high reflectivity are met; the requirements of the photo-thermal power generation glass substrate are met, and the practicability is high.

The invention discloses a cementing type composite insulator chain element with a double-umbrella-shaped and three-umbrella-shaped disk suspension type polymer. The element comprises a steel cap fitting, a steel leg fitting, an insulation core part, a polymer protecting sleeve and a polymer umbrella skirt. A cavity with the U-shaped section is formed in the steel cap fitting. The steel leg fitting is provided with a conical head portion matched with the cavity. The conical head portion of the steel leg fitting is arranged in the cavity of the steel cap fitting. The insulation core part is arranged between the conical head portion and the cavity. A cementing part is arranged in the center portion of the insulation core part and is an inverted-cone-shaped cavity. The outer surface of the insulation core part is covered with the polymer protecting sleeve. The outer surface of the polymer protecting sleeve is provided with the polymer umbrella skirt of a double-umbrella-shaped or three-umbrella-shaped structure. The conical head portion of the steel leg fitting and the cementing part are cemented into a whole through adhesive. The cavity of the steel cap fitting and the cementing part are cemented into a whole through the adhesive. The element can prevent bird damage, resist sand wind, prevent external force damage and assist in climbing and treading.

The invention provides an air-conditioning ventilation system for a rail passenger car and the rail passenger car. The system comprises an air-conditioning unit arranged under the car, an air supplying channel arranged at the car top, a vertical mixed air channel and a vertical air supplying channel, wherein an air inlet communicated with the outside of a car body and an air return port communicated with the inside of the car body are formed in the upper part of the vertical mixed air channel; the lower part of the vertical mixed air channel is communicated with the air-conditioning unit; and two ends of the vertical air supplying channel are communicated with the air supplying channel and the air-conditioning unit respectively. Air outside the car and return air inside the passenger car are mixed in the vertical mixed air channel and then enter the air-conditioning unit to be cooled or heated, and cooled or heated air enters the vertical air supplying channel and finally enters a passenger car room through the air supplying channel at the car top. A fresh air inlet and an air return port of the air-conditioning unit are formed in the vertical mixed air channel, and the vertical mixed air channel can be arranged inside the car, so that blown sand and particulate matters on a rail surface can be prevented from entering the air-conditioning unit, the blown sand resistance of the air ventilation system is improved, washing times of a filter screen are reduced, the replacement period is prolonged, and spaces at the car top and under the car are effectively used.

The invention relates to a UHPC (ultrahighperformanceconcrete) box type steel tube concrete stiff skeleton column structure and a construction method thereof, which comprises four support columns of equal length.The support columns are connected throughrebar UHPC plates, so that a square structure with support columns located at four corners is formed;the support columns and the rebar UHPC platesare arranged in a full-length mode; the support columnsare composed ofsteel tube concrete columns and outer wrapping UHPC layerswrapping the steel tube concrete columns, each of the steel tube concrete columns comprises a steel tube and tube inner concrete arranged in the steel tube in a filling mode; the rebar UHPC plates comprise square UHPC plates located between two adjacent support columns, positioning blocks are arranged on the side, connected with the supporting columns, in the square UHPC plates, the positioning blocks of the two adjacent support columns are connected through reinforcing meshes, and fixedly connected rebars erected and distributed in a staggered mode form the inside of the reinforcing mesh,the UHPC boxtypesteel tube concrete stiff skeleton column structureisreasonable in structure, good in ductility, high in bearing capacity, high in rigidity, light in self-weight, and good in durability, and the occupied space of pier studs is effectively reduced.

The invention discloses an electrified railway-used bar-shaped column type porcelain polymer composite insulator. The composite insulator comprises a porcelain core bar with more than one porcelain umbrella skirt. Two ends of the porcelain core bar are adhered with metal fittings via an adhering agent. The external surface of the porcelain core bar is covered with a polymer sheath with more than one polymer umbrella skirt. The surface of the porcelain core bar is processed via a coupling agent. The sheath and the umbrella skirt are solidified via high temperature and formed in one step on the porcelain core bar via an overall injection or pouring process. The umbrella skirt on the sheath comprises more than one large umbrella-shaped protrusion which is coaxially arranged with the porcelain core bar. The umbrella of the large umbrella-shaped protrusion is from 30mm to 60mm after the umbrella stretches out. The electrified railway-used bar-shaped column type porcelain polymer composite insulator which is pollution-flashover-resistant, bird-pecking-resistant and wind-and-sand-resistant is high in pollution flashover voltage so that crack and break in the process of using can be prevented. Meanwhile, the electrified railway-used bar-shaped column type porcelain polymer composite insulator has characteristics of being bird-trouble-resistant, wind-and-sand-resistant, external-force-damage-resistant and assistant in climbing and stepping.

The invention discloses a desert mask with a ventilation function, and relates to the field of masks. The desert mask comprises a front mask, a rear mask and two side masks, the front mask, the rear mask and the two side masks are mutually woven, the surface of the front mask is provided with eye openings, the surfaces of the two side masks are provided with ear openings, the surface of the front mask is provided with a mouth breathable layer and a nose breathable layer, the nose breathable layer is located at the bottoms of the eye openings, the mouth breathable layer is located at the bottom of the nose breathable layer, the surfaces of the two side masks are provided with ear breathable layers, the ear breathable layers are arranged around the ear openings in a surrounding mode, and a plurality of air holes are formed in the surfaces of the mouth breathable layer, the nose breathable layer and the ear breathable layers. The mouth breathable layer, the nose breathable layer and the ear breathable layers are perforated by using a perforating machine, so that the breathable holes are formed, and due to the fact that inner layer openings of the breathable holes are large and outer layer openings are small, breathing of a wearer can be more convenient, and inhalation of sand is effectively reduced.

The invention discloses a crimping type double-umbrella-shaped and triple-umbrella-shaped disk-shaped suspension composite insulator string element, which includes a mandrel, fittings arranged at both ends of the mandrel, and a sheath covering the outer side of the mandrel; wherein the The sheath is provided with a double umbrella-shaped or triple umbrella-shaped umbrella skirt extending along the circumference of the sheath; wherein the metal fittings are crimped on the mandrel, and the sealing structure is cured and molded on the outer surface of the fittings at high temperature . The invention has the functions of preventing bird damage, resisting wind and sand, resisting damage by external force and assisting climbing.

The invention discloses a contact type unmanned aerial vehicle automatic charging device which comprises a shell, heat dissipation holes, a protection shell, a sponge pad, a connecting plate, a protection shell motor, a rotating rod, a charging pole plate, a relay, a voltage detection module, a main control chip, a battery, an electronic compass, a stand column, a pressure sensor, a balance charger, a pantograph, a heat dissipation shell, a heat dissipation fan, a filter screen, a communication module and a two-dimensional code plate. The contact type unmanned aerial vehicle automatic charging device is simple in structure and novel in design, the automatic charging device can be conveniently added in a working path of an unmanned aerial vehicle, autonomous landing charging of the unmanned aerial vehicle is achieved, the working process of related operation can be greatly simplified, manual participation is reduced, the working cost is reduced, and the efficiency is improved; under the effect of the arranged flap mechanism, the protection shell can seal the end part of the shell conveniently; the wind and sand prevention performance of the shell is improved, the stability of electrical components in the shell is guaranteed, the maintenance time of the device is shortened, the stability is improved, and the device is convenient for workers to use.

The invention relates to the technical field of billboards, and particularly discloses an outdoor billboard with a sand-proof function. The billboard comprises a fixing cylinder, a fixing mechanism is arranged on the outer wall of the fixing cylinder, a mounting disc is fixedly connected to the fixing mechanism through a climbing mechanism, the mounting disc is slidably sleeved in the fixing cylinder, a stand column is mounted on the top of the mounting disc, the top end of the stand column extends to the position above the fixing cylinder and is fixedly connected with a bearing disc, and an LED display screen is installed on the bearing disc. A large pit is prevented from being left on the ground after the billboard is detached, the integrity of the ground after the billboard is detached is guaranteed, ecological environmental protection is facilitated, the billboard can be fixedly installed without digging a large area of the pit, and the billboard can be fixedly installed only through the area with the same diameter as the fixing cylinder, so that occupied land resources are saved and damage to the ground is reduced.

The invention relates to a concrete-encased double-limb steel pipe concrete dumbbell-shaped column structure. The concrete-encased double-limb steel pipe concrete dumbbell-shaped column structure comprises two column limbs and a reinforced concrete board connected between the column limbs, wherein the column limbs are both composed of steel pipe concrete columns and column concrete-encasing layers, the steel pipe concrete columns both comprise pipe inner concrete and steel pipes, the reinforced concrete board comprises node blocks, steel bars and a filled concrete layer, the node blocks are connected with the steel pipes and are arranged many at intervals in the axial direction of the steel pipes, and the two ends of the steel bars are connected with the corresponding node blocks on the adjacent steel pipes correspondingly. The concrete-encased double-limb steel pipe concrete dumbbell-shaped column structure is simple in structure and has the advantages of fire prevention, corrosion prevention, high bearing capacity and good durability.

The invention discloses lawn planting equipment and a planting method for soil remediation. The lawn planting equipment comprises supporting mechanisms, a connecting mechanism and an isolating mechanism; the four supporting mechanisms form a group and are combined for use; the top ends of the four supporting mechanisms are embedded into the isolating mechanism; every two adjacent supporting mechanisms are fixedly connected through the corresponding connecting mechanism; each supporting mechanism comprises a supporting frame; connecting side edges are symmetrically arranged on the surfaces of the left sides and the right sides of the supporting frames; the inclination of the connecting side edges is 90 degrees; fixing holes are symmetrically formed in the ends, close to the connecting side edges, of the left sides and the right sides of the supporting frames; and reinforcing grooves are evenly formed in the front faces of the supporting frames. When the lawn planting equipment for soil remediation is used, the number of assemblies is small, splicing and large-area laying are convenient, carrying is convenient, input of manual labor force is reduced, cost is reduced, the ground gripping capacity of turf is improved, movement in sandy soil is avoided, stability of the turf can be guaranteed through large-area laying, and meanwhile the survival rate of plants is increased.

The invention discloses an integrated-molding-type bell-jar-shaped disk-shaped suspension-type polymer insulator string element. The integrated-molding-type bell-jar-shaped disk-shaped suspension-type polymer insulator string element comprises a steel cap fitting, a steel leg fitting and a polymer insulating part, wherein the inner portion of the steep cap fitting is provided with a cavity with a U-shaped cross section, and the steel leg fitting is provided with a conical head portion matched with the cavity; the conical head portion of the steel leg fitting is arranged in the cavity of the steel cap fitting; the disk-shaped polymer insulating part is arranged between the steel cap fitting and the steel leg fitting, the disk-shaped polymer insulating part is formed in one step through an integrated injection or pouring technology, meanwhile, the disk-shaped polymer insulating part, the steel cap fitting and the steel leg fitting are solidified into a whole at high temperature, and the polymer insulating part comprises a bell-jar-shaped disk-shaped shed. The integrated-molding-type bell-jar-shaped disk-shaped suspension-type polymer insulator string element has the advantages of preventing bird trouble and being resistant to sand, wind and external force destroy and capable of assisting climb and tread.