67results about How to "Improve blasting efficiency" patented technology

The invention discloses a deep hole blasting method for a strip mine step, relates to the technical field of blasting engineering, and aims to solve the problems that an existing strip mine step blasting method is easy to cause excessive large blocks on a slope surface and on the front section of the step, so that the excavation difficulty and the transportation potential safety hazard are increased. The method comprises the steps that an inclined first main blast hole and a vertical second main blast hole are drilled in the end, close to the slope surface, of a step to be blasted; a first auxiliary hole crossed with the first main blast hole is drilled in the slope surface, and a second auxiliary hole is formed beside the first main blast hole of the step; charging each blast hole with explosives; all the blast holes are connected into a detonating network through detonating lines; detonating through an exploder; wherein the first main blast hole and the second main blast hole can be distributed in a quincunx shape, the second main blast hole is vertical, and each main blast hole comprises a filling section and a charging section. According to the method, the auxiliary holes are formed to solve the problem of insufficient explosion stress of the slope and the step front section, and the explosion effect is improved.

The invention relates to the technical field of sand blasting, in particular to oxide layer treatment equipment for oil casing head machining. Comprising a fixing frame, the fixing frame is provided with a sand blasting pipeline, the sand blasting pipeline is fixedly connected with a rotating ring, first hydraulic telescopic rods which are symmetrically distributed and second hydraulic telescopic rods which are symmetrically distributed, the rotating ring is fixedly connected with first elastic telescopic rods which are symmetrically distributed, and the rotating ring is fixedly connected with first sand blasting sleeves which are symmetrically distributed; and the sand blasting pipeline is rotationally connected with a progressive piece. The variable-diameter position in the casing head is detected through the telescopic end of the first elastic telescopic rod, when the inner diameter of the casing head changes, the telescopic end of the second hydraulic telescopic rod is used for driving the telescopic end of the adjacent first sand blasting casing pipe to move, the distance between the first sand blasting casing pipe and the inner wall of the casing head is correspondingly adjusted, and the inner diameter of the casing head is adjusted. The situation that when the inner diameter of the casing head changes, the spraying position is not changed, so that sand blasting is too dispersed or concentrated, and the sand blasting effect is affected is prevented.

The invention relates to a blasting structure and a blasting method for a steep rock slope, the steep rock slope comprises a step to be blasted and a structural surface rock mass, and the step and the structural surface rock mass are integrally connected; the blasting structure comprises a pre-splitting blasting area and a main blasting area, and the pre-splitting blasting area and the main blasting area are sequentially distributed in the horizontal direction in the direction away from the structural face rock mass. The pre-splitting blasting area comprises at least two rows of pre-splitting holes which are sequentially distributed in the direction away from the structural surface rock mass in the horizontal direction, and the first row of pre-splitting holes are formed in the designed excavation contour line of the structural surface rock mass when viewed from the direction away from the structural surface rock mass in the horizontal direction; the main blasting area comprises at least two rows of main blasting holes which are sequentially distributed in the horizontal direction in the direction away from the structural face rock mass. And each row of pre-splitting holes and each row of main blasting holes are arranged in parallel. The overall blasting efficiency is high, the forming quality of the excavated contour surface is high, and the blasting requirement of the ultrahigh steep slope can be well met.

The invention relates to the technical field of wearable watch bottom shell production and processing, in particular to wearable watch bottom shell automatic intelligent sand blasting equipment which comprises a base. The top of the outer wall of the base is fixedly connected with a motor; a rotating shaft is arranged at the output end of the motor; circular plates are fixedly connected to the top ends of the outer walls of the rotating shafts; a group of circular rods are arranged at the top end of the outer wall of the circular plate; connecting frames are fixedly connected to the top ends of the outer walls of the circular rods; a placing plate is arranged on the inner side wall of the connecting frame through a first rotating rod; a rotating shaft and a circular plate are driven by a motor to rotate, the circular plate drives a circular rod, a connecting frame, a placement plate and a wearable watch bottom shell to rotate, the wearable watch bottom shell moves into a sand blasting shell and is subjected to sand blasting by sand blasting guns, multi-angle sand blasting can be achieved due to different angles and positions of one group of sand blasting guns, the defect rate is reduced when the wearable watch bottom shell is subjected to sand blasting, and the sand blasting efficiency is improved. And in addition, due to the full-automatic sand blasting mode, the rate of finished products and the sand blasting efficiency are stable and high.

The invention discloses sand blasting equipment which comprises a sand blasting chamber, a bearing mechanism, a spray gun mechanism and a sand supply mechanism, the sand blasting chamber is provided with a sand blasting space, the bearing mechanism comprises a rotatable bearing part capable of moving inside and outside the sand blasting space, and the spray gun mechanism comprises a first movable spray gun, a second movable spray gun and a third movable spray gun. The first spray gun, the second spray gun and the third spray gun spray sand towards the first face, the second face and the outer side face of a workpiece correspondingly, the sand supply mechanism comprises a sand sweeping pipeline, a cyclone separator and a sand flow divider, one end of the sand sweeping pipeline communicates with the sand blasting space, and the other end of the sand sweeping pipeline communicates with a feeding port of the cyclone separator. The sand flow divider is arranged in the sand blasting space, a material inlet of the sand flow divider is communicated with a material outlet of the cyclone separator, and material distribution ports of the sand flow divider are respectively communicated with the first spray gun, the second spray gun and the third spray gun. According to the sand blasting equipment, simultaneous sand blasting on the three faces of the workpiece and full-area sand blasting on the workpiece are achieved, and the working efficiency and the sand blasting yield are improved.

The feeding mechanism comprises a machine frame, a sand blasting bin is arranged on the machine frame, a feeding opening is formed in one side of the sand blasting bin, a columnar workpiece is connected to the machine frame in a sliding mode, an auxiliary feeding assembly and an overturning assembly are arranged on the machine frame, and the overturning assembly comprises a first motor arranged on the machine frame; an output shaft of the first motor is in transmission connection with a turnover shaft through a belt wheel and a belt, the turnover shaft is arranged in the length direction of the rack and rotationally connected to the rack, a plurality of turnover wheels are coaxially and fixedly arranged on the turnover shaft in the length direction, and the turnover wheels abut against the outer surface of the workpiece. The auxiliary feeding assembly drives the workpiece to move along the axis. The sand blasting device has the effect of improving the sand blasting efficiency of the columnar long material workpiece.

The invention relates to the technical field of battery production, in particular to a moped battery negative grid surface treatment system. Comprising a box body, the two ends of the box body are provided with a feeding port and a discharging port respectively, the feeding port and the discharging port are oppositely arranged, a clamping driving device is arranged in the box body, and a sand blasting treatment device is arranged at the upper end of the box body. When the battery negative grid is subjected to sand blasting treatment, the spray head can swing at multiple angles in the rotating process, and an included angle is formed between the sand blasting direction and the battery negative grid, so that effective sand blasting can be performed on the side surfaces of transverse ribs and longitudinal ribs of the battery negative grid during sand blasting, and the sand blasting area of the battery negative grid can be increased; and the adhesive force of the lead paste on the negative grid of the battery is improved.

The utility model relates to the technical field of sand blasting devices for PC brick production, the sand blasting devices comprise two workbenches, a conveying belt is arranged at the upper ends of the workbenches, an overturning assembly is arranged between the two workbenches, the overturning assembly comprises a U-shaped fixing frame, a cylinder is movably mounted in the U-shaped fixing frame, and a sand blasting device is arranged in the cylinder. One end of the cylinder penetrates through the outer portion of the U-shaped fixing frame, a circular gear disc is fixedly installed at one end of the cylinder, an auxiliary table is fixedly installed on the outer side of the U-shaped fixing frame, a T-shaped sliding groove is formed in the upper end of the auxiliary table, a spur rack long plate is arranged at the upper end of the auxiliary table, and an electric telescopic rod is fixedly installed at the upper end of the auxiliary table. A connecting plate is fixedly mounted at one end of the electric telescopic rod, and one end of the connecting plate is fixedly connected with the straight rack long plate; the sand blasting device for producing the imitated PC bricks is high in sand blasting efficiency, and the overturning sand blasting operation can be conveniently carried out on the imitated PC bricks.

The utility model belongs to the technical field of constructional engineering, and particularly relates to a mortar spraying device for constructional engineering, which comprises a stirring sand blasting cylinder, and a mounting frame is fixed at the top end of the stirring sand blasting cylinder; a connecting plate is fixed at one end of the mounting frame; fixing frames are arranged at the top ends of the connecting plates; an adjusting frame is fixed on one side of the top of the fixing frame; an adjusting disc is rotationally connected to the center of the inner side of the adjusting frame. The inner side of the adjusting frame is rotationally connected with a two-way screw rod; the two ends of the two-way screw rod are in threaded connection with adjusting seats; and a plurality of adjusting arms are arranged between the adjusting seat and the adjusting disc. Through the structural matched design of an adjusting disc, a two-way screw and an adjusting seat, when the device uses a stirring sand blasting cylinder and a high-pressure sand blasting head to conduct sand blasting on the wall face, the construction angle of the high-pressure sand blasting head to conduct sand blasting on the wall face is conveniently adjusted along with construction of sand blasting on the wall face, the sand blasting construction range of the device is widened, the steps of manual matched operation are reduced, and the construction efficiency is improved. And the sand blasting efficiency of the device on the wall surface is improved.

The utility model belongs to the technical field of automobile cooling fin manufacturing and application, and particularly discloses a sand blasting device for automobile cooling fin machining. Comprising a skid-mounted fixing base, a sand tank, a PLC, a first through groove, a sand blasting pipe with a valve, a sand blasting gun, a fixed vertical supporting plate, a first bearing, a first rotating rod, a first fixing block, a strip-shaped block, a strip-shaped sliding groove, a sliding block, a movable vertical supporting plate, a second shaft, a second rotating rod, a second fixing block, a second through groove, a transverse mounting base, a transverse hydraulic cylinder, a transverse motor base and an explosion-proof motor. And a shaft coupling and a shielding protection cover. Compared with a traditional sand blasting machine, the automatic rotary sand blasting machine has the advantages that manual operation for surface changing of the cooling fins is not needed, automatic rotary surface changing in the sand blasting process of the automobile cooling fins is achieved through the explosion-proof motor and the like, and the sand blasting efficiency is improved; through the transverse hydraulic cylinder and the like, the automobile cooling fins can be conveniently clamped to be fed or loosened to be discharged; and through the cyclone dust collector and the like, adsorption and recovery of sand blasting dust are achieved, and environment-friendly sand blasting operation is completed.

The utility model discloses a high security liquid oxygen blasting device, including a plurality of liquid oxygen explosion pipe, each liquid oxygen explosion pipe all is installed with branch line, a plurality of branch line common installation has main line, the end of main line is installed with two plug -in post, one side of two plug -in post common is equipped with detonator, the top of detonator is installed with protective cover, be equipped with limiting mechanism on the protective cover, be equipped with four adjusting mechanism on the protective cover, the outer wall fixed connection of detonator has two C type handle that is symmetrically set, install rotary button on detonator, be equipped with two insertion slot on detonator, two plug -in post all cooperate with insertion slot. The utility model discloses through the setting of protective cover and its limiting mechanism, can reliably isolate sundries, greatly promote operation security, the adjusting mechanism on protective cover can adjust support leg height flexibly, make control equipment also can keep level on the uneven ground, be convenient for staff operation.

The utility model relates to the technical field of glass processing, and discloses an optical glass sand blasting device with a rotating mechanism, which comprises a worktable, supporting legs are fixedly connected to the bottom of the worktable close to four corners, a bottom plate is fixedly connected to the four supporting legs close to the bottom, and vertical plates are fixedly connected to two sides of the top of the bottom plate. A V-shaped plate is fixedly connected to the middle of the top of the bottom plate, strip-shaped holes are formed in the two sides of the V-shaped plate, limiting mechanisms are arranged on the two vertical plates and comprise two round rods arranged on the vertical plates in a sliding and sleeving mode, and round holes matched with the two round rods are formed in the vertical plates. According to the utility model, the technical effects of automatically turning over the glass, greatly improving the efficiency of the sand blasting process and reducing the time of manual operation are realized, so that the production efficiency is improved.

The application relates to a high-performance aluminum profile sand blasting production line, which comprises a first conveying device, a second conveying device and a sand blasting device, the first conveying device is located at the front end of the sand blasting device, the second conveying device is located at the rear end of the sand blasting device, and doors are arranged at the front end and the rear end of the sand blasting device; a wind channel and a dust removal box are arranged at the top of the sand blasting device, one end of the wind channel is in communication with the inside of the sand blasting device, the other end is in communication with the inside of the dust removal box, an air outlet is arranged on the dust removal box, a partition plate is arranged in the dust removal box, the dust removal box is divided into a first space and a second space by the partition plate, the wind channel is in communication with the first space, the air outlet is in communication with the second space, ventilation holes are arranged on the partition plate, a filtering structure is arranged in the first space, and the filtering structure can automatically clean adhered sand dust. The production line is not easy to cause pollution of the working environment, and is beneficial to the physical health of workers.

The present invention provides a method for excavating an underground marine project based on sequential controlled blasting, comprising the following steps: arranging the first blasting hole and the last blasting hole in the following manner: 1) arranging the first blasting hole and the last blasting hole alternately; 2) arranging them in the order of first blasting hole, last blasting hole and first blasting hole, and repeating the arrangement; selecting the arrangement mode, setting the blasting parameters based on the rock properties of the working face to be blasted; the blasting parameters include the charge density of the blasthole line, the uncoupling coefficient in the charge structure, the detonation time difference and the distance between the blasting holes; collecting the half-hole rate and the large block rate after blasting to optimize the charge density of the blasthole line and the distance between the blasting holes. By using the method of sequential controlled blasting, the amount of explosives required for blasting is effectively reduced, while the blasting efficiency is improved, and the consumption of materials and manpower during the construction process is reduced, thereby saving costs. By optimizing the number of blasting holes and charge parameters, the construction quality and safety are guaranteed.

The invention provides a blast hole blocking method, a blast hole blocking device and a blast hole blocking system.The blast hole blocking method comprises the steps that blocking parameter information is obtained, and the blocking parameter information comprises structural parameters of a blast hole and the density rho of a blocking material; according to the plugging parameter information, the mass delta m of a plugging material needed for plugging the blast hole is calculated; and the feeding mechanism is controlled to fill the blast hole with the blocking material, the mass m1 of the blocking material actually filled into the blast hole by the feeding mechanism is controlled, and the difference value between the m1 and the delta m is made to be within the preset range. According to the blast hole blocking method, the safety, efficiency and accuracy of blast hole blocking operation can be improved.

The invention discloses a large-diameter deep hole non-coupling charging structure and a charging method, and relates to the technical field of deep hole blasting. A blast hole located in the bottom is formed in the bottom of the large-diameter deep hole, a plurality of explosive bags are installed on the top of the blast hole, a detonating cord is installed in the middle of each explosive bag, a detonator is installed on the top of each detonating cord, and a detonating tube is connected to the top of each detonator. Each section of explosive bag at least comprises three groups of column explosives, the column explosives are communicated with one another, bamboo canes are mounted on the outer sides of the column explosives, and the sizes of the upper and lower ends of the bamboo canes are smaller than the height of the explosive bag; the adjacent column explosives are closed and are not separated; a closed end is installed at the bottom of the large-diameter deep hole, a central air pipe is installed on the closed end, and the top of the central air pipe extends out of the large-diameter deep hole. The high explosion risk caused by separated type laying and charging is avoided, and the stable safety effect is achieved through block type installation and layer-by-layer stacking.

The utility model provides sand blasting equipment based on an adjustable spray gun, belongs to the technical field of sand blasting devices, and aims to solve the problems that a spray head on the surface of an existing spray pipe cannot rotate flexibly, so that the sand blasting efficiency is relatively low, and blast sand sprayed by the spray head is easily stained on the inner wall of a window, so that the visual field of workers is influenced. Four supporting legs are fixedly installed on the lower end face of the sand blasting chamber, two door plates are rotationally connected to the surface of a front end side plate of the sand blasting chamber, and an observation window is arranged in the middle of the surface of a rear end side plate of the sand blasting chamber. According to the sand blasting machine, the cam is attached to the side plate at the front end of the U-shaped frame, the cam can drive the U-shaped frame to reciprocate when rotating, and the fixed teeth on the surface of the U-shaped frame are meshed with the fixed gear, so that when the U-shaped frame reciprocates, the spraying pipe can rotate back and forth, and at the moment, blasting sand sprayed by the spraying head is in a sector shape; and the sand blasting efficiency of the nozzle on the workpiece is improved.

The utility model discloses a strip mine blast hole charging structure above a goaf and a layered explosion control system, which adopt a subsection charging structure, adjacent explosive sections are separated by an air column, a buffer layer with a honeycomb structure is arranged between the explosive section at the bottommost layer and the bottom of a blast hole, the air column is arranged above the explosive section at the topmost layer, and the hole is sealed by stemming; the explosive section is filled in the blasting energy gathering pipe and is separated from the wall of a blast hole, a main stress compensation layer and an auxiliary buffer layer are sequentially and fixedly arranged close to the wall of a goaf top plate, the main stress compensation layer is laid by foam blocks, the auxiliary buffer layer is a hard plate, direct friction between the foam blocks of the main stress compensation layer and the goaf top plate is reduced, and local stress concentration is dispersed. According to the utility model, through directional energy release of the blast hole charging structure of the strip mine at the upper part and cooperation of active stress compensation and vibration monitoring in the goaf at the lower part, dual improvement of blasting efficiency and safety under the condition that the goaf exists is realized.

The utility model discloses a titanium polar plate sand blasting device with a positioning function, which belongs to the technical field of plate sand blasting and comprises a machine body, a motor is arranged in the machine body, supporting rods are fixedly connected to the left end and the right end of the outer wall of the motor, and the tail ends of the supporting rods are fixedly connected to the bottom wall of the machine body. The output end of the motor is fixedly connected with a first connecting column, the top end of the first connecting column is fixedly connected with a containing disc, the top wall of the machine body is fixedly connected with a plurality of second connecting columns, the top ends of the second connecting columns are fixedly connected with a sand blasting chamber, and a pushing mechanism is arranged at the left end of the inner wall of the sand blasting chamber and comprises a first sliding groove. The placing disc can be controlled to rotate slowly by starting the motor, so that the position of a sand blasting workpiece can be adjusted, and the sand blasting device is controlled to move up and down in cooperation with the electric push rod, so that all-directional sand blasting can be performed on the workpiece, and the sand blasting efficiency is improved.

The invention relates to the technical field of metal treatment, in particular to a high-performance metal part surface treatment device and process, and aims to improve the surface treatment efficiency and uniformity of metal parts. The device comprises a sand blasting box, a first rotating shaft, a plurality of mounting seats, a second rotating shaft, a bracket, a sand blasting head, a collecting box and the like. The sand blasting device is structurally characterized in that a plurality of supports are arranged in the sand blasting box and used for fixing metal parts, and synchronous autorotation of the metal parts is achieved through cooperation of gears and gear rings. The sand blasting medium and the spraying mode are optimized, and the treatment uniformity is improved; the spraying strength and angle are improved, the sand blasting efficiency is improved, the production period is shortened, and the safety is improved; the efficient recovery system reduces resource waste and meets the environmental protection requirement. The corrosion resistance and the wear resistance of the treated metal parts are remarkably improved, the service life is prolonged, and the maintenance cost is reduced.

This utility model discloses a sandblasting device for cast steel parts, relating to the field of cast steel part processing technology. It aims to solve problems such as difficulty in supporting and driving large annular cast steel parts, uneven sandblasting, and poor sand recovery during sandblasting. The device includes a base, a sandblasting machine, and a recovery box. The base is equipped with multiple sets of arc-shaped support seats and drive seats, with support rollers and drive rollers working together to support and drive the cast steel parts. A collection bin and a cover form a sandblasting chamber, housing a U-shaped rotatable sandblasting pipe frame and nozzles. The sandblasting machine is connected to a high-pressure air source to transport sand, and the recovery box recovers sand under negative pressure using a blower. The drive system uses gear transmission, driving the cast steel parts to rotate through stable support. This provides stable support and effective drive for large annular cast steel parts, allowing them to rotate smoothly during sandblasting, facilitating all-around sandblasting and improving sandblasting quality and efficiency. Simultaneously, it enables timely sand recovery, enhancing both practicality and environmental friendliness.

The invention discloses a hard rock tunneling roadway smooth blasting method. The hard rock tunneling roadway smooth blasting method comprises the following steps that S1, blast holes are arranged according to the determined actual position of a tunneling roadway; s2, the blast holes are formed, the blast holes comprise empty holes, underholing holes, auxiliary holes and peripheral holes, and the underholing holes are spiral underholing holes; s3, a blast hole reverse non-coupling charging structure is adopted, and stemming is adopted for non-coupling interval plugging; s4, stemming blocking is conducted on a blast hole opening, and the blocking length is not smaller than the minimum resistance line length; s5, detonating by adopting a detonating tube detonating method, and implementing segmented delayed detonating by adopting a network in a series-parallel combination mode; and S6, detonation is conducted, and a gun pile is cleaned. The method has the characteristics of improving the blast hole utilization rate, improving the initial blasting efficiency and reducing explosive misfire.

The invention belongs to the technical field of blasting, and particularly relates to an energy-gathered directional blasting device with a vibration reduction function, which comprises two first baffles, second baffles are arranged between the two ends of the first baffles, a fixed cavity is formed in each first baffle, the interior of each fixed cavity is divided into a plurality of buffer grooves through cross plates, and the cross plates are arranged in the buffer grooves. And a buffer block is slidably arranged in each buffer groove, and the outer surface of the fixed cavity is slidably covered with a movable cover. According to the device, the device can be directly pasted on the surface of blasting earthwork, the connecting plate is pasted on the surface of the earthwork through glue, explosives for blasting can be directly placed in a blasting hole in advance, and the blasting hole can be filled with the explosives through the explosive pipe; energy can be gathered to a certain extent, the impact force of blasting is limited within the range of blasting holes, energy-gathered directional blasting can be achieved, the blasting quality and efficiency can be improved, and the blasting range can be effectively controlled.

The utility model discloses a sand blasting equipment for mould surface treatment, including the cabinet and setting in the controller of cabinet, collection groove, sand screening machine, sand blasting box, compressed gas output device, the collection groove sets up in the bottom of cabinet and is connected sand screening machine through the sand pump of drawing, sand screening machine sets up in the top of cabinet The bottom of sand blasting box is connected with the sand blasting head of extending into the cabinet, the side of cabinet is provided with Z axial drive mechanism, Z axial drive mechanism includes Z axial moving plate and Z axial drive arrangement, sand blasting box and compressed gas output device all set up in Z axial moving plate, be provided with the rotary placement platform of mould placement in the cabinet, the rotary placement platform includes mounting bracket and placement board, be provided with rotary drive arrangement on mounting bracket. Mould is placed in the placement board, and through the movement of sand blasting head of the rotation of itself, realizes more comprehensive to the mould surface and carries out the processing, is favorable to the sand blasting efficiency of sand blasting equipment.

This application relates to the field of tunnel engineering blasting technology, and provides a shaped charge hydraulic smooth blasting device for ultra-large cross-section mountain tunnels. It includes reinforced explosive, a first shaped charge tube, a second shaped charge tube, a third shaped charge tube, half-rolls of explosive, an electronic detonator, a detonating cord, a water bag, and a sandbag. The first, second, and third shaped charge tubes are arranged coaxially in sequence, with half-rolls of explosive at both ends of each tube. The detonating cord connects the half-rolls of explosive at both ends of the shaped charge tube. The reinforced explosive is located at the end of the first shaped charge tube furthest from the second shaped charge tube, and the electronic detonator is located at the reinforced explosive. The water bag is located at the end of the third shaped charge tube furthest from the second shaped charge tube, and the sandbag is located close to the water bag. The sandbag is used to block the blast hole, and the lead wire of the electronic detonator passes through the blast hole. This application improves the blasting effect of shaped charge blasting.

The present invention relates to the field of metal processing technology, and in particular to a surface treatment device for alloy rollers after quenching. A clamping machine base for fixing the quenched alloy roller is arranged on a moving track, and a sandblasting device and a grinding wheel device are sequentially arranged along the extending direction of the moving track, and then a controller is used to control the sandblasting device and the grinding wheel device to perform sandblasting and grinding operations on the quenched alloy roller fixed on the clamping machine base respectively, and the order of sandblasting first and then grinding is adopted. During the grinding process, the order of initial grinding and then fine grinding is adopted, that is, the same grinding wheel disc is used but different rotation speeds to successively grind the blasted alloy roller; the sandblasting device and the grinding wheel device cooperate with each other, so as to ensure that the oxides formed on the surface of the alloy roller after quenching are effectively removed, and the efficiency of removing oxides is higher and the cost is lower than that of chemical immersion.

The invention relates to the field of civil engineering construction, and discloses a stone deep cutting shallow hole step blasting method which comprises the steps that S1, a site is leveled, and the blasting depth of a first layer and the blasting reserved width of a first layer step after blasting construction are determined; s2, determining a main excavation boundary line position, a blast hole position and a blasting main excavation boundary line; s3, arranging a plurality of blast holes in the first layer by adopting a perforating machine; s4, the arrangement and depth of each blast hole are checked, and explosives are installed in each blast hole; s5, the electronic detonators of the explosives in all the blasting holes are connected through detonating cords to form a blasting network, and the connected blasting network is connected with an electronic detonator exploder; s6, protection and warning are carried out, and millisecond blasting detonation is carried out; the presplitting blasting method is adopted for the slope cutting, adverse effects such as slope vibration in the excavation process of the main blasting area can be effectively avoided, the millisecond one-by-one blasting method is adopted, the millisecond time is gradually increased from inside to outside, the blasting effect is guaranteed, and ground vibration is reduced.

The utility model discloses a sand accumulation prevention sand blasting rotary table suitable for an automatic sand blasting chamber of a gas compressor, and relates to the technical field of sand blasting. The rotary table is rotationally mounted on the supporting main body and is used for placing a sand blasting workpiece, and the table surface at the top end of the rotary table upwards extends out of the supporting main body; the spray gun is used for carrying out sand blasting on a workpiece on the rotary table and simultaneously cleaning sand on the rotary table, and the spray gun is positioned above the table surface of the rotary table; and the follow-up scraping plate is used for cleaning sand between the rotary table and the supporting main body, is positioned below the table surface of the rotary table and above the top end surface of the supporting main body, and is fixedly connected with the table surface of the rotary table. The sand-accumulation-preventing sand blasting rotary table provided by the utility model has the beneficial effects of improving the sand blasting efficiency, reducing the cleaning workload, prolonging the service life of equipment, improving the working safety, protecting the environment, saving energy and the like, and the automatic sand blasting production efficiency and quality of a gas compressor can be effectively improved.

The utility model discloses a sand blasting device for a control arm, and belongs to the technical field of automobile control arm machining. A control arm sand blasting device comprises a workbench, a clamping assembly, a fixing frame, a stroke mechanism and a spray head. The clamping assemblies are fixedly installed on the upper end face of the workbench, the number of the clamping assemblies is two, and the two clamping assemblies are transversely and vertically arranged on the workbench respectively, the control arm is clamped and fixed through the two clamping assemblies which are transversely and vertically arranged, during sand blasting, the control arm is firstly fixed through the transverse clamping assembly for sand blasting, and after sand blasting is completed, the control arm is clamped and fixed through the clamping assemblies. And then the control arm is fixed through the vertical clamping assembly for sand blasting, so that sand blasting is carried out on sand blasting dead angles of the transverse clamping assembly, sand blasting machining is more thorough, the situation of dead angles is avoided, manual secondary rework sand blasting is not needed, and the sand blasting efficiency is improved.

The utility model provides a display bracket surface sand blasting treatment device, and relates to the technical field of display bracket surface treatment. The display support surface sand blasting treatment device comprises a box body, a box door, a material receiving hopper, a rolling assembly, a gear ring, a gear set, a first motor, a circular ring, a guide rod, a placement net, a limiting rod, a bidirectional lead screw, a second motor, a side box, a placement frame, a sleeve, a sand blasting pipe and a sand blasting nozzle, a conveying pipe connected with the sand blasting pipe is arranged in the sleeve, and a fixing plate is arranged on one side of the sand blasting pipe; according to the device, after sand blasting treatment can be completed on the surfaces of one sides of a plurality of display supports, all the display supports can be turned over in a unified mode, and therefore the display supports can be turned over in a uniform mode; workers do not need to turn the display brackets one by one, so that the turn-over efficiency of the display brackets is greatly improved, the manual operation time is saved, and the sand blasting treatment efficiency is improved.