114results about How to "Safe and reliable support" patented technology

The invention discloses an excavation and preliminary bracing method for a soft rock tunnel. The excavation and preliminary bracing construction for the soft rock tunnel are performed in sections from back to front. When any section is subjected to excavation and preliminary bracing construction, the method comprises the following steps: 1) confirming basic mechanical parameters of the surrounding rock; 2) confirming the reserved excavated volume of the tunnel: confirming the reserved excavated volume of the currently constructed section according to a theoretical value of inward displacement of the surrounding rock of the soft rock tunnel after being braced; 3) excavating the tunnel; 4) confirming a preliminary bracing structure of the tunnel; 5) constructing the preliminary bracing of the tunnel; 6) performing the excavation and preliminary bracing construction of the next section; and 7) repeating the step 6) till all the processes of the excavation and preliminary bracing construction of the soft rock tunnel are completed. The method disclosed by the invention has the advantages of simple steps, reasonable design, convenience in realization and good use effect; the reserved excavated volume is confirmed according to the surrounding rock deformation condition of the soft rock tunnel; and the steel bracket and the anchoring net sprayed preliminary bracing structure are coordinated for performing all-section preliminary bracing on the tunnel.

The present invention relates to an accessible circular knitting machine (1) with an improved spinning head, comprising bottom legs supporting needle cylinders (3), wherein the needle cylinders are arranged to enable the axes (3a) to be perpendicular to each other and actuated to rotate about the axes (3a) thereof relative to the bottom legs (2), the bottom legs (2) also support a yarn guide carrier (4) arranged above the needle cylinders (3), the yarn guide carrier (4) is supported by an arm (5), the arm extends out from the top of a column (6) vertically rising from the areas of the bottom legs (2) in a manner of suspension arm, and the areas are spaced broadwise relative to the needle cylinders (3).

A cup holder for a vehicle is mounted in the vehicle for supporting a cup. The cup holder includes a housing mounted on a wall portion of the cup holder, which has a receiving groove for receiving a cup. The housing includes a first guide groove formed therein, a guide movably mounted in the housing so as to enter and exit from the first guide groove, the guide having a second guide groove corresponding to the first guide groove, and a spring for restricting the guide from entering and exiting from the first guide groove of the housing. Even if excessive force is applied to the cup guide when the cup is inserted into the cup holder, an upper portion of the guide is prevented from departing from the housing, so that the cup holder can safely support the cup.

The invention discloses a blockchain construction method for distributed identity authentication in the industrial field, and the method comprises the steps: recording an identity authentication auditing identifier of an industrial entity at an authentication institution end into an identifier analysis system; carrying out authentication and credit endorsement of the industrial entity digital identity by an authentication authority (e.g., government, enterprise, etc.), with the authentication and endorsement being done prior to the industrial entity chaining; allocating a blockchain address ofeach industrial entity in an industrial network based on an identifier recorded by the industrial entity at an authentication mechanism end, registering the industrial entity on a blockchain according to a specific address, and preparing to perform an uplink operation, thereby protecting the digital identity of the industrial entity from being influenced by other equipment; after chaining, carrying out credible authentication of industrial entity digital identity information based on a digital identity authentication system of the block chain; the digital identity authentication system basedon the block chain guarantees the authenticity of digital identity information and provides credible authentication service.

The invention discloses a construction method for a shallow depth bored tunnel to penetrate through a box culvert. The method comprises the following steps of construction preparation, construction of a preparation section, determination of the size of a box culvert section, construction of a sagging transitional section, construction of the box culvert section, construction of an upward-tilting transitional section, construction of an ending section, inspection of the supporting strength, and restoration of normal excavation of the constructed tunnel. The transition sections of the tunnel are short, the bottom of the tunnel is unchanged in excavation depth, only the shape of the section of the tunnel is changed, the influence of the existing box culvert on tunnel construction is ingeniously avoided, and the construction progress is guaranteed on the premise that the construction safety is guaranteed.

The invention discloses a dense net type advanced supporting system of a bored tunnel and a construction method applying the system for carrying out supporting. The system comprises a grouting sleevevalve pipe and a pipe shed, the grouting sleeve valve pipe is adopted for grouting, then, a subsequently-excavated front tunnel face and surrounding rock thereof are subjected to reinforcing, the dense net type pipe shed is driven for serving as supporting, through the pipe shed, the surrounding rock on the excavated section top is subjected to supporting, an advanced small guide pipe is driven into a pipe shed gap, through the advanced small guide pipe, the rock soil strength nearby the inner side face of the tunnel is reinforced, the system is more suitable for underground excavation construction work of a sandy cobble stratum, the dense net type pipe shed is added, grouting is carried out, the self framework effect of the sandy cobble stratum is effectively used, compared with previoussandy cobble stratum underground excavation engineering, the stratum settlement is effectively controlled, happening of excavating oversquare condition is limited, meanwhile, during construction, theexcavating length is not limited, engineering cost is saved, construction and surrounding building safety is ensured, and the forceful guarantee is provided for urban underground excavation engineering safety construction.

The invention relates to a safety wheel and particularly relates to a safety wheel with an oppositely-opened type aluminum-alloy wheel rim with large offset distance for a special vehicle. The problems that a traditional wheel has large weight and is also inconvenient to assemble are solved. The safety wheel with the oppositely-opened type aluminum-alloy wheel rim with the large offset distance for the special vehicle comprises a tubeless tyre, a hard supporting body and an oppositely-opened type aluminum-alloy wheel rim with large offset distance, wherein the structure of the hard supporting body is the structure of a supporting body which is a three-section type detachable structure, and the offset distance of the wheel is not smaller than 90mm. The material of the hard supporting body is hard nylon. Compared with a steel wheel rim with the same specification, the weight of the safety wheel is reduced by more than 50 percent; compared with a rubber supporting body with the same specification, the weight of the hard supporting body is reduced by about 55 percent, so that the weight of an entire wheel assembly is greatly decreased; and the safety wheel with the oppositely-opened type aluminum-alloy wheel rim with the large offset distance for the special vehicle is beneficial to enhancing the operating and controlling performance of a vehicle and lowering the energy loss of the vehicle. The safe running mileage can be obviously enhanced. The assembling process is simple, the assembly and the disassembly of the wheel assembly can be carried out without exclusive tyre pressing and installing equipment, the assembling process is simplified, the assembling time is shortened, and the cost of logistic guarantee is also lowered.

The invention discloses a subway transfer station deep foundation pit excavation support construction method. A diaphragm wall enclosure structure is adopted, concrete supports and steel pipe combined supports are arranged, the inner side concrete supports form annular reinforced concrete supports, concrete support formworks adopt prefabricated reverse pressing block reverse pressing easy-to-dismantle formwork systems and shaped formwork systems, built-in segmental steel of waist beams and the diaphragm wall enclosure structure are combined in an anchoring-hanging mode to form a whole, and latticed columns adopt flexible anti-collision construction protection devices. The construction method comprises the steps of (1) construction preparation, (2) drainage in a field, (3) diaphragm wall construction, (4) concrete support and waist beam reinforcement cage binding, (5) concrete support and waist beam formwork erection, (6) concrete pouring and maintenance, (7) formwork removal and foundation pit excavation, and (8) construction of the next layer of concrete supports. According to the subway transfer station deep foundation pit excavation support construction method, the overall safety and stability of a foundation pit are guaranteed, the construction speed is greatly increased, and obvious social benefits and economic benefits are achieved.

The invention discloses a novel network safety firewall wireless router, and the wireless router comprises a case. The case is provided with a universal shaft, and the universal shaft is connected with a wireless transmitting antenna. The case is also provided with a plurality of LED indicator lights, and the upper ends of the LED indicator lights are provided with a display. The rear surface of the case is provided with an external interface and a power interface. The upper end of the power interface is provided with a toggle switch, and the left end of the toggle switch is provided with a phosphor dot. The interior of the case is provided with a main controller, and the main controller is connected with a firewall module, a data storage module, a network communication module, an interface module and a power module. The main controller is used in the wireless router through combining with the technology of network safety firewall, and enables the wireless router in use to be able to provide safe and reliable network support, thereby greatly improving the safety of the wireless router and guaranteeing the reliability when a user uses a network. Therefore, the wireless router is worthy of being popularized.

The invention discloses a gob-side entry retaining method for pouring spacing concrete walls in a tunnel of an advanced highwall. A plurality of flexible formworks which are arranged at intervals are hung in a return air laneway of the advanced highwall by single bodies or anchor rods, concrete is poured into the flexible formworks via a concrete pump, a spacing concrete wall is formed and clings to a roof, then the flexible formworks are hung in space intervals of the spacing concrete wall by a lagging work surface, the concrete is pumped into the flexible formworks, so that a closed concrete continuous wall is formed, and finally a gob-side entry is formed. The spacing concrete wall is poured in the advanced highwall to realize gob-side entry retaining, requirements of ventilation, recovery and construction are met, supporting is safe and reliable, and recovery is not affected. The method is suitable for crushing the roof to realize gob-side entry retaining during recovery, and is widely used for industries of coal mines, metallurgical mines and the like.

The embodiment of the invention discloses a retracement method for a fan section of a fully-mechanized coal mining retracement working face. The retracement method comprises the steps that a supporting support is mounted in the fan section, wherein the supporting support supports a fan section top plate; a first hydraulic support to be retraced is drawn out; after the first hydraulic support to beretracted is drawn out, the supporting support moves in the direction close to a second hydraulic support to be retraced by rubbing the top plate; when the supporting support moves in the direction close to the second hydraulic support to be retraced by rubbing the top plate for a first preset distance, the supporting height of the supporting support is increased; when the supporting height of the supporting support is increased to first preset height, the second hydraulic support to be retraced is drawn out. According to the retracement method, the retracement efficiency can be improved, andthe retracement cost can be reduced.

The invention discloses a general type assembly welding and positioning device used for various side wall frameworks, and relates to the technical field of railway vehicle side wall framework welding.The general type assembly welding and positioning device comprises a plurality of foundation T-shaped slot guide rails, a plurality of height adjustable foundation beds, a table board, four pressingmechanisms, a plurality of ball head mechanisms, a plurality of pivotal shafts, a plurality of upper positioning blocks, a plurality of lower positioning blocks, a plurality of cushion blocks and twothree-sided right-angled positioning blocks. The height adjustable foundation beds, the ball head mechanisms and the pivotal shafts are matched, so that the supporting end surface of the table board has different angles, and therefore, side wall frameworks of different structures can be supported; the height adjustable foundation beds are matched with the foundation T-shaped slot guide rails, so that production cost is reduced, and support for side wall frameworks of various structures can be safely and reliably realized; and the upper and lower positioning blocks are matched, so that quick positioning and assembly for the side wall frameworks of various structures is realized. The device is convenient in dismounting, is simple in operation, is strong in generality, reduces workload of anoperator, reduces the production cost, and improves production efficiency.

The invention discloses a modeling structure of a seat backrest framework adopting continuous glass fiber reinforced composite material plates. The modeling structure defines a composite back plate ofwhich the seat composite material backrest framework should be divided into a passenger supporting area, a transition wing plate of a transition connecting area and a mounting plane. The mounting hole parameters of a mounting plane are provided. The trepanning process parameters of the seat backrest framework of the continuous glass fiber reinforced composite material plates are adopted. According to the perforating process, the perforating diameter range, the range of the distances between holes, the range of the distances between the holes and the edge of the framework and the selection range of the thickness of the framework and the thickness of a plate are specified, so that the composite framework adopting the perforating process can be in conventional bolt connection with a metal piece. The better connection strength can be achieved.

The invention provides a seating stage for fishing, comprising an upper plate, and a plurality of support columns. The upper plate provides a space for the user to sit and for placing a space for containing a chair for the user to sit and also provides a space for placing a plurality of fishing rods; besides, the part of the upper plate can be folded and expanded according to the need; the integral appearance is made of the carbon fiber comprising a first carbon fiber layer, a polyurethane foam layer and a second carbon fiber layer; the plurality of support columns constitute a double-tube type, wherein a plurality of length regulation holes horizontally go through the inner tube; and the fixing holes horizontally go through the outer tube so as to communicate with the length regulation holes. Because the sitting stage for fishing is easy to store and solid, when the user sits or stands on the sitting stage, the sitting stage can be fully supported and the manufacture cost is low.

A mattress that at disaster strike, can be used as a stretcher, and that when not used as a stretcher, can find ordinary mattress uses. There is provided mattress (1) having stuffing covered by a covering material, wherein on covering material (3), not only are grippers (4) fixed at corner side edge portions of the mattress but also one end portion of each of multiple fixing belts is fixed to both longitudinal side edges, and wherein there are disposed storage parts (7a,7b) for storing of the fixing belts, the fixing belts at the other end portions having fastening members fixed thereto.

The invention discloses a vehicle fuel tank supporting structure. A pair of longitudinal brackets (15, 19) extending along the front-to-rear direction are arranged on the central channel (3) sandwiching the central part of the vehicle width direction of the base plate (1), so as to connect the joint under the base plate (1) and along the base plate (1) A plurality of horizontal frames (7, 11, 12, 17) provided between the vehicle body underframes (2) extending forward and backward on both sides in the vehicle width direction of ) are connected front and rear. At least one of the pair of longitudinal supports (15, 19) supports the center portion of the fuel tank (30) in the vehicle width direction. Therefore, in the support structure of the fuel tank (30) provided under the floor (1) of the vehicle, the fuel tank (30) can be reliably supported without providing a horizontal frame only for supporting the fuel tank (30).

The invention discloses a mechanical self-locking hydraulic jack. A locking nut is movably connected to the outer wall of a cylinder block of a traditional jack in a screwed mode through threads, and under the jacking action of the jack, the locking nut is matched to go up and down along the thread on the outer wall of the cylinder block so as to achieve the supporting function. The mechanical self-locking hydraulic jack is simple and compact in structure, firm and stable in connection, convenient, rapid and safe to use and operate, and suitable for meeting the requirement for the double actions of jacking and supporting on various occasions.