1221results about How to "Guaranteed support effect" patented technology

The invention provides a full-automatic pipe cutting machine comprising a frame, and a charging device, a feeding device, a cutting device, a measuring device and a control device which are sequentially arranged on the frame horizontally; the cutting device comprises a cutter holder which is arranged on the frame, a plurality of first motors which are lined horizontally along a longitudinal direction and can be arranged on the cutter holder by moving up and down, a first cylinder which is connected with and drives each first motor to move up and down synchronously, a circular saw blade which is arranged on the output shaft of each first motor, a second motor which is in transmission connection with the input shaft of each first motor through a first transmission mechanism, and a bearing piece which is arranged on the tool rest below each circular saw blade and is used for bearing a pipe at a cut part; and the measuring device comprises a guide rail which is horizontally arranged on the frame, a slide frame which is movably arranged on the guide rail, a driving mechanism which is connected with and drives the slide frame to move along the guide rail, a pipe baffle which is arranged on the slide frame and a first pipe clamping mechanism which is horizontally arranged on the slide frame along the longitudinal direction. According to the full-automatic pipe cutting machine, more than one pipe can be cut at one time, and the machine has the advantages of high cutting efficiency, good cutting quality and the like.

The invention provides a novel all-steel mud-field tire, and belongs to the field of tires. Through the adoption of the novel all-steel mud-field tire disclosed by the invention, improving tire strength is facilitated, impact resistance and durability of the tire are improved, and the service life of the tire is prolonged. A longitudinal section of the all-steel mud-field tire comprises a tire crown (1), a tire shoulder (2), a tire sidewall (3), a tire bead (6), and a tire body (4), wherein the tire crown (1) is located on the outer side of the upper part of the longitudinal section; the tire shoulder (2) is connected with the tire crown (1); the tire sidewall (3) is connected with the tire shoulder (2); the tire bead (6) connected with a wheel rim is arranged at the lower part of the tire sidewall (3); the tire body (4) is located on the inner side of the section of the tire; a tire shoulder pad (21) is arranged on the tire shoulder (2); a convex rib (31) is circumferentially and annularly arranged on the outer part of the tire sidewall (3); and the tire body (4) is a layer of all-steel tire body.

The invention relates to a coarse steel bar prestress anchor rod, which comprises: an anchor rod body, a support pad plate, a locking nut, a centering device, free section sleeve, and pouring discharge channel, wherein the anchor rod body is divided into outer anchor section, anchor fixing section and free section; the outer anchor section is formed by support pad plate, locking nut and one section f external anchor rod; the anchor rod of free section is sheathed with free section sleeve whose two end buckles fix the screw on the anchor rod body near one end of support pad plate, to rotate and move along tow end buckles on the anchor rod; its middle part is separated from anchor rod body to form separate chamber. The invention can be used in underground construction and rock anchor fixing, with simple process and low cost.

The invention discloses a soft rock tunnel deformation control method based on anchor rod force analysis. A soft rock tunnel is excavated and subjected to deformation control construction from back to front according to multiple segments, and when any segment is excavated and subjected to deformation control construction, the method includes the steps that 1, surrounding rock basic mechanical parameters are determined; 2, the tunnel reserved excavated volume is determined; 3, the tunnel is excavated; 4, a tunnel preliminary bracing structure is determined; 5, tunnel deformation control construction is carried out, wherein in the tunnel preliminary bracing construction process, a flexible mold bracing structure is constructed from back to front; 6, a next segment is excavated and subjected to deformation control construction; 7, the step 6 is repeated multiple times till the full excavation and deformation control construction process of the soft rock tunnel is completed. The soft rock tunnel deformation control method is reasonable in design, convenient to achieve and good in use effect, the reserved excavated volume is determined according to the surrounding rock deformation condition of the soft rock tunnel, the flexible mold bracing structure is adopted for carrying out full-section bracing on the tunnel, the flexible mold bracing structure and the tunnel preliminary bracing structure are in coordination deformation, and deformation of the soft rock tunnel can be effectively controlled.

The invention discloses a conveying sheath. The conveying sheath comprises an inner layer, a middle layer and an outer layer which are arranged from inside to outside in sequence, wherein the middle layer at least comprises a first reinforced segment and a second reinforced segment which is located at the far end of the first reinforced segment and is connected with the first reinforced segment; the second reinforced segment comprises a plurality of repeated cutting units; the plurality of cutting units are arranged along the axial direction of the conveying sheath; the cutting units comprisefirst cutting areas and second cutting areas; the projection lengths of the first cutting areas on the cross section of the second reinforced segment are larger than the projection lengths of the second cutting areas on the cross section of the second reinforced segment; the average axial cutting lengths of the first cutting areas are smaller than the average axial cutting lengths of the second cutting areas. According to the conveying sheath of the invention, the bending angle is not liable to rebound and a good bending shape can be kept after the far end of the conveying sheath is bent and sized towards the first cutting areas.

The utility model discloses a bandwidth control method and a device, which are used on a route switching device with a plurality of interfaces. The method is to field-divide the interfaces according to the physical network structure; wherein each field comprises a group of internal interfaces and a group of external interfaces and the number of the interfaces in each group is one or more; the field bandwidth strategy is established for each field; when the packet is received from an interface, the bandwidth is controlled according to the field bandwidth strategy in the affiliated field and then the packet passing through the bandwidth controlling process is sent to the other group of interfaces in the affiliated field. The utility model considers the interface hardware limiting factors and the logical managing factors sufficiently so as to get rid of the dependency on the single interface, ensure the bandwidth stability of the conversational individual and be propitious to realize the multilayer and fine-grain interface bandwidth control.

The invention discloses a capture mechanism and a multi-level lead screw non-cooperative target docking mechanism, and relates to the technical field of aerospace. The mechanisms solve the problems about operation such as recognition, measurement and capture on a target under the non-cooperative situation of an existing spacecraft. According to the scheme of the capture mechanism, a first motor drives a linkage mechanism to rise to a grab portion to be in an open state, and the grab portion is driven by the linkage mechanism to rapidly fold and contract backwards. According to the scheme of the docking mechanism, the docking mechanism is composed of the capture mechanism and a telescoping mechanism, wherein the telescoping mechanism achieves stretching and contraction in the mode that a second motor drives three levels of lead screws to stretch out level by level through a bevel gear drive mechanism and a spur gear drive mechanism. The capture mechanism and the multi-level lead screw non-cooperative target docking mechanism are used for effectively capturing a long-distance jet pipe.

The invention discloses a chemical-mechanical polishing pad and solves the problem that an existing polishing pad is scratched easily and low in polishing efficiency. According to the technical scheme, the chemical-mechanical polishing pad comprises a polishing layer, a plurality of holes are formed in the polishing surface of the polishing layer, the center of the polishing surface is a circle center, and the holes are arranged into multiple rows of concentric rings different in diameter. The center of the polishing surface is an end point, and a plurality of grooves extending to the edge of the polishing surface are evenly radiated from the end point. The surface roughness of the polishing surface is below 15 micrometers. The polishing pad is simple in structure, capable of increased polishing removing efficiency and inhibiting scratches, and long in service life.

The invention provides an antiseismic product, and relates to an antiseismic building. Because 18 times of earthquakes above M7 and 1 to 2 times above M8 occur on the earth each year, people are in dire need of various antiseismic products. The invention provides the building capable of adopting automatic prevention measures to resist earthquakes. The entire building is designed by adopting the principle of tumblers; therefore, the building is just like a tumbler and does not collapse in a new environment when an earthquake causes ground cracks, sinking or land slides. Moreover, because the groundwork of the building is a solid hemispheroid or a laid down semicylinder, a cambered surface at the bottom can disperse the impact force of an earthquake on the building and changes the direct ofthe impact force, thereby ensuring that earthquake waves spread toward the periphery of the building; meanwhile, the earth generates powerful attraction on the inclined solid groundwork to force the building to recover and maintain erection or an inclined but not collapsed state, thereby guaranteeing the safety of human life and property. Therefore, the antiseismic building is suitable for schools, factories, city buildings and residential buildings and is particularly suitable for top-grade villas and scenic spot construction.

The invention relates to an electrostatic-spun coated composite pelvic mesh and a manufacturing method thereof. The composite pelvic mesh is composed of a coating layer and a supporting layer, wherein the coating layer is bonded on one side of the supporting layer. The manufacturing method comprises the following steps: mixing polylactic acid and polycaprolactone, dissolving the mixed polylactic acid and polycaprolactone in a solvent, and then heating and stirring, so that a polylactic acid/polycaprolactone solution is obtained; brushing a layer of binding agent on one surface of a polypropylene warp-knitted mesh and sticking the other surface on an aluminum foil which serves as an electrostatic spinning receiving device, and conducting electrostatic spinning by using the polylactic acid/polycaprolactone solution as a spinning solution; and volatilizing and disinfecting, so that the pelvic mesh is obtained. The pelvic mesh disclosed by the invention, by combining absorbable materials and non-absorbable materials and on the basis of characteristics of the electrostatic spinning which is high in specific surface area and high in porosity, has the features of being light in weight, high in porosity, soft to touch, good in biocompatibility and the like.

The invention discloses a surrounding rock supporting construction method of a water-contained roadway of a coal mine and belongs to the field of surrounding rock supporting of underground engineering. The surrounding rock supporting construction method comprises the following steps that (1) primary spraying is conducted after the roadway is excavated; (2) according to the geological conditions of the water-contained roadway, a controllable grouting anchor rod structure is designed, and controllable grouting anchor rod-anchor cable supporting parameters are designed; (3) through the combination of controllable grouting anchor rods, anchor cables, metal nets and sprayed grout supporting, so that a grouting reinforcement waterproof ring is formed, and grout is sprayed onto the surrounding rock on the surface of the roadway; (4) the key portion where supporting needs to be reinforced and water insulation is needed is determined through the field observation technical means such as numerical simulation; (5) the supporting parameters of the water-contained roadway are adjusted and optimized, and grouting reinforcement supporting is conducted on the key portion; and (6) a base plate of the roadway is reasonably supported. The invention further provides a surrounding rock supporting structure. The supporting method and structure are suitable for water-contained roadways with different depths, roadways with broken surrounding rocks, and soft rock roadways; and in addition, construction is easy and convenient, and the supporting method and structure can be popularized within a wide range.

The invention discloses a short-distance coal seam roadway excavating and supporting method. The method comprises steps as follows: 1, basic mechanical parameters of surrounding rock are determined; 2, reserved excavated volumes of two sides of a roadway are determined; 3, the roadway is excavated; 4, a roadway side supporting structure is determined and comprises roadway supporting units and grouted rock bolts which are arranged in a staggered manner, and the roadway supporting units comprise top plate supporting systems, bottom plate supporting systems and roadway side supporting systems; and the limit caving arch rise is determined; 5, the roadway supporting structure is determined; 6, roadway surrounding rock supporting construction is performed; 7, excavation of the next section and roadway surrounding rock supporting construction are performed; 8, the step 7 is repeated multiple times, and the short-distance coal seam roadway construction process is completed. The method is simple, reasonable in design, convenient to realize and good in use effect, the reserved excavated volumes of the two sides of the roadway are determined respectively according to surrounding rock deformation conditions of the short-distance lower coal seam roadway, and whole section supporting is performed on the roadway through combination of the grouted rock bolts with the roadway supporting units.

The invention discloses an excavation and support method of large cross-section tunnel through fault fracture zone. The initial support structure of tunnel comprises a whole cross-section support system and the lattice girder and shotcrete support structure of the tunnel. A temporary support structure of middle-partition wall is arranged between a left pilot tunnel and a right pilot tunnel. The actual construction includes the steps: 1, excavation of the upper tunnel body; 2, the judgment of the initial support deformation of the tunnel arch wall and the construction of the replacement arch; 3, excavation of the lower tunnel body. The excavation and support method of large cross-section tunnel through the fault fracture zone has reasonable design, simple construction, and good use effect.Only the upper half section of the tunnel is excavated by the center diaphragm method, and the excavation cross-section is reduced so that the stability of the arch roof is ensured. The whole cross-section support system and the temporary support structure of middle-partition wall are supported by the underpass beam and joined together to form a stable monolithic support system, which can avoid the sinking of the supporting arch and ensure the stability of the initial support effectively. Besides, the construction of replacement arch is conducted on only half cross-section of the tunnel and the cost can be saved, and the construction safety can be ensured.

The invention relates to the technical field of coal mine anchor rod supporting, and discloses a novel coal mine high-strength anchor rod supporting device. An anchor rod supporting mechanism comprises an outer anchorage rod, an inner anchorage sleeve and an outer blocking fixing assembly, the inner anchorage sleeve can be well connected with the inner wall of a drill hole through a reinforcing structure extending in the radial direction, the inner anchorage sleeve is of a circumferential expansion structure, can easily stretch into the drill hole and can carry out special grouting through a grouting device, integrated performance of the inner anchorage sleeve and the inner wall of an anchorage hole can be ensured, the reinforcing structure can stretch into the rock layer of the anchoragehole, the segmented grouting anchorage manner enables anchorage slurry to be more fully filled, the anchorage reliability can be improved, the combination force with the wall of the anchorage drill hole can be improved, anchorage effect is ensured, in addition, for the fragile portion at the connecting position of the inner anchorage sleeve and the outer anchorage rod, through the manner of arranging multiple radial fins, the connecting property of the connecting position can be effectively improved, and the supporting capacity is ensured.

The invention discloses an aortic windowing branch covered stent and belongs to the technical field of vascular stents. The aortic windowing branch covered stent comprises a tubular skeleton made of thin filaments and a membrane covering the tubular skeleton. The proximal end of the tubular skeleton is suitable for being inserted into a window of the aortic windowing branch covered stent and communicated with the aortic windowing branch covered stent. The remote end of the tubular skeleton is suitable for being inserted into a branch blood vessel, and the proximal end is harder than the remote end. The aortic windowing branch covered stent lowers the operation difficulty of minimally invasive surgery in an aortic lumen with branch blood flow, solves the technical problem that in the surgery, internal leakage occurs easily, can adapt to fitting the tortuous branch blood vessel and effectively prevents damage to the branch blood vessel and occurrence of re-blocking and internal leakage.

The invention provides a target material assembly and a manufacturing method thereof. The manufacturing method comprises the following step: providing a target material and a back plate capable of bonding with the target material in a welded manner so as to form the target material assembly, wherein the thickness of the target material accounts for at least 60% of the thickness of the target material assembly. According to the invention, the thickness of the target material accounts for at least 60% of the thickness of the target material assembly; thus, compared with a scheme that the thickness of the target material accounts for a smaller proportion of the thickness of the target material assembly, the target material assembly provided by the invention has the following advantages: the thickness of the target material can be increased under the condition that the thickness of the target material assembly is unchanged, and the part of the target material for sputtering is correspondingly increased, so the service life of the target material assembly is effectively prolonged; the replacement frequency of the target material assembly is effectively reduced; improvement of process efficiency and reduction of process cost can be easily realized; meanwhile, the thickness of the target material assembly can remain unchanged, so a sputtering machine bench does not need to adjust thespacing between the target material and a product about to undergo film formation (such as a wafer), and adverse effects on the initial sputtering rate and film-forming uniformity of the target material assembly are avoided.

The invention discloses a space joint support structure and support method for a water-rich broken strata tunnel, and relates to the technical field of tunnel construction. The problems that a large-scale deformation is prone to occur due to the fact that a water-rich broken surrounding rock section adopts a conventional spray anchoring to support surrounding rocks, the surrounding rock pressure is great, effective prevention and control of water leakage is difficult, and stability of a tunnel structure and safety of construction are jeopardized are solved. The key points of the technical scheme are that the space joint support structure comprises an initial concrete layer, a steel mesh, and steel arches arranged at intervals; longitudinal connecting steel beams distributed along the axialof a tunnel in a staggered mode are arranged between the steel arches in the circumferential direction; longitudinally connecting steel beams are connected with anchor rods; a steel fiber concrete layer covering the steel arches, the steel mesh, and the longitudinally connecting steel beam sprays the surface of the steel mesh; a waterproof and drainage structure layer paves the surface of steel fiber concrete; and a second lining concrete layer pours the surface of the waterproof and drainage structure layer. According to the space joint support structure and support method for the water-richbroken strata tunnel, deformation of the surrounding rocks in the tunnel can be effectively controlled, the waterproof and drainage functions are excellent, and stability of the tunnel structure andsafety of construction are ensured.

The invention discloses a soft rock tunnel construction method on the basis of flexible formwork support. A soft rock tunnel is divided into a plurality of segments from back to front to be subjected to construction. Construction of any one segment comprises the following steps that (1), basic mechanical parameters of surrounding rocks are defined; (2), the tunnel reserved excavating quantity is defined; (3), the tunnel begins to be excavated; (4), A tunnel support structure is defined: the tunnel support structure comprises a tunnel incipient support structure, a flexible formwork support structure and tunnel two-time linings; (5), tunnel incipient support is constructed; (6), the flexible formwork support is constructed; (7), the tunnel two-time linings are constructed; (8), a next segment is constructed; and (9), step (8) is repeated for many times until all the construction processes of the soft rock tunnel are completed. According to the soft rock tunnel construction method on the basis of the flexible formwork support, the method and the steps are easy, design is reasonable, achieving is convenient, and the using effect is good; and the reserved excavating quantity is defined according to deformation conditions of the surrounding rocks of the soft rock tunnel, the flexible formwork support structure is adopted to support full cross sections of the tunnel and subjected to coordination deformation with the tunnel incipient support structure, and thus structure stability of the tunnel two-time linings is guaranteed.