30results about How to "Control extension" patented technology

A method for eliminating the welding residual stress by utilizing high-pressure water jet belongs to technical field of welding. The high-pressure water jet (3) sprayed by a nozzle (1) moves on a weld (4), the axial dynamic pressure of the water jet (3) is adjusted to be 220-700MPa; the distance between the water outlet of the nozzle (1) and the weld (4) is kept to be 5-10mm, the water jet (3) moves back and forth for 4 to 8 times along the weld track and perpendicular to the workpiece surface, and the stress eliminating effect is reinforced. The method for eliminating the welding residual stress is easy to operate, and quickly eliminates the residual stress on the welding part after welding. The stress on the weld in a narrow space can be eliminated, such as dead angle part and repair welding part, and can ensure that the whole weld stress eliminating effect is good, stable and average.

The invention discloses a backfill handling method for an activity subsidence area of a mine. The backfill handling method is characterized in that mixed slurry is prepared by mixing high-concentration tail mortar which is obtained by densely dehydrating low-concentration tail mortar through a deep cone thickener (1) with rough aggregates and concrete which are discharged by an aggregate silo (2) and a power silo (3) through a mixer (4); and the slurry is pumped to the subsidence area (6) through a pump (5) so as to be discharged. During the discharging, the subsidence area is backfilled by a discharging mode of plane partitioning staggering and vertical cement and non-cement interbedding; according to the plane partitioning staggering discharging, the subsidence area is divided into a plurality of independent discharging areas on a plane according to a spatial distribution state of the subsidence area, and the mixed slurry is discharged in the staggered manner according to different areas; and according to the vertical cement and non-cement interbedding discharging, cement backfill layers (7) and non-cement backfill layers (8) discharge the slurry in the staggered interbedding manner in the vertical direction of the subsidence area. The backfill method has the characteristics of low backfill cost, safety and reliability in backfill and the like.

The present invention relates to the technical field of pesticides, and specifically provides a pharmaceutical composition containing pyraclostrobin, which comprises the following active ingredients in parts by weight: 0.5-5 parts of pyraclostrobin, and 8-30 parts of pyraclostrobin And high lipid film 40 ~ 120 parts. Among the active substances of the medicament composition of the present invention, pyraclofen plays a role in defoliation, and after application, it can improve the growth environment of cotton bolls in the middle and lower parts of cotton plants, and create an environment that is not conducive to the infection and growth of pathogenic microorganisms; Pyroxystrobin can effectively prevent the occurrence of cotton boll disease caused by oomycetes; high lipid film can effectively control the expansion of infected lesions and reduce the probability of cotton bolls being infected by other weak pathogenic bacteria. The combination of the three can adjust the external environment of cotton bolls, inhibit the activity of pathogens of cotton boll disease and the probability of infection, and can effectively control the development of the disease and reduce the risk of cotton bolls being infected by other weak pathogenic bacteria after application at the initial stage of cotton boll disease. probability.

The invention relates to a hydraulic valve assembly having a cartridge insert valve in a bore hole designed in a valve block and connected to the flow channels arranged in the valve block comprising a valve sleeve inserted in the bore hole and a closing member guided into said sleeve, wherein the valve sleeve forms a valve seat for the closing member in the closing position thereof and the closing member can be moved by means of a connected hydraulic pre-control between the closed position thereof seated on the valve seat and separating the flow channels from one another, and an opened position pushed into the valve sleeve, and the bore hole is sealed tight by the cartridge insert valve inserted the rein via a valve cover connected to the valve block. The closing member forms a sleeve-shaped closing element (17) exhibiting a through-hole (18) and thus ring surfaces on both ends thereof, the surfaces having identical area, and a pressure equalization chamber (19) corresponding with the through-hole (18) of the closing element (17) is formed in the valve cover (20) such that the closing element (17) is engaged on both sides with the pressure enacting in the adjustment direction of the element, which is seated completely pressure-equalized in the valve sleeve (14), wherein a radially protruding collar (21) having control surfaces (22, 23) opposite one another in the adjustment direction is arranged on the outer circumference of the closing element (17) for adjustment thereof. The control surfaces can be loaded by the control oil conducted via the hydraulic pre-control (25) for moving the closing element (17) in the valve sleeve (14), and the valve sleeve (14) inserted in the bore hole (11) of the valve block is fastened on the valve cover (20), the valve seat (16) formed on the valve sleeve (14) thereby maintaining an unaltered distance from the valve cover (20) during operation of the valve assembly.

The invention relates to a method for growing strawberry plug seedlings from south to north, comprising the following steps: 1) cultivating strawberries in a warm and suitable area in the south in spring, so that a large number of healthy stolons can grow; 2) transporting the stolons to the north in summer In cool and suitable areas, the stolons are cultivated until flowering and fruiting by the plug seedling raising method. The invention makes full use of the warm spring climate in a specific area in the south to breed strawberry stolons, and then utilizes the climate advantage in the cool and cool area in summer in a specific area in the north to promote the flower bud differentiation of strawberry seedlings.

The invention provides a strain of Bacillus Velez and its bacterial agent and application, which belong to the technical field of microbes. The present invention screens out a strain of biocontrol bacteria Bacillus velezensis GY1 from the rhizosphere soil of healthy tobacco, which has significant antagonism to various plant pathogenic bacteria that occur seriously in agricultural production, and has a wide antibacterial spectrum. At the same time, it has been proved by experiments that it can effectively control the occurrence of tobacco leaf mildew and the expansion of tobacco red spot disease spots during the curing period, thereby improving the quality of tobacco leaves and increasing the use value of tobacco leaves, indicating that the strain has broad application prospects in the field of biological control of plant diseases and Good practical value.

The invention discloses a ballast bed and tunnel bottom defect regulating and constructing method as well as an anchoring device. The anchoring device comprises anchor rod and ballast bed slab anchoring ends and ballast bed slab middle anchoring ends, wherein each anchor rod and ballast bed slab anchoring end comprises a combination end, an anchor rod I and deformed steel bars I, the combination end is welded by two pieces of anchor rod clamp-fixing angle steel and a piece of ballast bed slab clamp-fixing angle steel, the two pieces of anchor rod clamp-fixing angle steel are welded on the same surface of the ballast bed slab clamp-fixing angle steel, and an interval allowing the anchor rod I to pass is reserved between the two pieces of angle steel, and the deformed steel bars I are welded on two sides of the combination end respectively; and each ballast bed slab middle anchoring end comprises a bearing plate, an anchor rod II and deformed steel bars II, the bearing plate adopts a crossed steel plate provided with a hole which is formed in the middle and allows the anchor rod II to pass, and the deformed steel bars II are welded on two sides of the bearing plate respectively. According to the ballast bed and tunnel bottom defect regulating and constructing method as well as the anchoring device, the structure is simple, the processing is easy, the problems of baseplate reinforcement and controlling and blocking of opening and closing cracks between the ballast bed slab and the baseplate can be solved effectively, and the purpose of quick, effective and comprehensive regulation of the ballast bed slab and tunnel bottom defects is achieved.

The invention discloses an external prestress multipoint anchoring strengthening method of a bridge structure. After prestressed steel completes tensioning, anchoring of ends is performed firstly, and then elastic anchoring of midpoints is performed. Compared with a conventional anchoring method, the method solves defects in a conventional two-point-anchoring that effective prestress is too fast to loss when dynamic load is applied, and the method is an effective active strengthening method. The method is advantaged of realizing to ensure integrated effect after prestress tensioning, compensating loss of internal prestress, improving bearing capacity, closing cracks and controlling expansion of the cracks, properly restoring structural linetype and stopping midspan from downwarping continuously, and obviously changing force bearing performance of a concrete structure.