CN111941290A

CN111941290A - Galvanizing process for steel

Info

Publication number: CN111941290A
Application number: CN202010721621.4A
Authority: CN
Inventors: 高军良; 王金淼; 宋建刚; 马平; 潘焱波
Original assignee: Shaoxing Electric Power Equipment Co ltd
Current assignee: Shaoxing Electric Power Equipment Co ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2020-11-17
Anticipated expiration: 2040-07-24
Also published as: CN111941290B

Abstract

The invention discloses a galvanizing process for steel, which comprises the following steps: a. surface treatment of steel: shot blasting treatment is carried out on the surface of the steel by adopting shot blasting equipment, and impurities and rust on the surface are removed; b. degreasing treatment: degreasing the steel by using a degreasing solvent; c. hot galvanizing treatment: placing the degreased steel into a galvanizing solution tank, and soaking the steel in the solution at 435 ℃ for 15 min; d. and (3) drying treatment: conveying the galvanized steel to a drying box for drying treatment; e. and (4) checking: inspecting the dried steel, and finishing galvanizing after the steel is qualified; the shot blasting equipment comprises a machine body, a first shot blasting device, a second shot blasting device and a dust removal device, wherein the first shot blasting device is arranged on the machine body and used for processing the surface of the inner wall of the steel, the second shot blasting device is used for processing the surface of the outer wall of the steel, and the dust removal device is arranged on the machine body; the shot blasting equipment can be used for comprehensively treating the surface of steel, and can keep continuous separation of steel balls and dust after shot blasting.

Description

Galvanizing process for steel

Technical Field

The invention relates to the technical field of galvanizing, in particular to a galvanizing process for steel.

Background

In the prior art, before galvanizing, the surface of a steel needs to be subjected to impurity removal and rust removal treatment, shot blasting equipment is mostly adopted to treat the steel, oxide skin, rust layer and impurities on the surface of the steel are smashed by high-speed steel ball flow beams thrown by a high-efficiency impeller head, so that a fine bright surface is obtained, the tensile strength and compressive strength of a workpiece are improved, the adhesive force is increased for surface galvanizing protection, and the purposes of preventing corrosion, protecting a pipe and prolonging the service life of the steel are achieved. The separation of the steel balls from the dust is inconvenient, i.e. the recycling of the steel balls is inconvenient.

Disclosure of Invention

The invention provides a galvanizing process for steel products in order to overcome the defects of the prior art, and the shot blasting equipment can be used for comprehensively treating the surface of the steel products and keeping the continuous separation of steel balls and dust after shot blasting.

In order to achieve the purpose, the invention adopts the following technical scheme: a galvanizing process for steel comprises the following steps:

a. surface treatment of steel: shot blasting treatment is carried out on the surface of the steel by adopting shot blasting equipment, and impurities and rust on the surface are removed;

b. degreasing treatment: degreasing the steel by using a degreasing solvent;

c. hot galvanizing treatment: placing the degreased steel into a galvanizing solution tank, and completely soaking the steel in the solution at 435 ℃ for 15 min;

d. and (3) drying treatment: conveying the galvanized steel to a drying box for drying treatment;

e. and (4) checking: inspecting the dried steel, and finishing galvanizing after the steel is qualified;

the shot blasting equipment in the step a comprises a machine body, a feeding and discharging device arranged on the machine body, a first shot blasting device arranged on the machine body and used for surface treatment of the inner wall of the steel, a second shot blasting device used for surface treatment of the outer wall of the steel and a dust removing device, wherein the second shot blasting device comprises a first arc-shaped plate, a plurality of first arc-shaped grooves, a plurality of first rotating rods, a plurality of second arc-shaped grooves, a first gear, a second gear, a fourth gear, a second gear, a third gear, a fourth gear, a third gear, a second gear, a third gear, the steel ball feeding device comprises a first driving assembly, a first clamping assembly, a moving block, a plurality of through holes, a nozzle, a steel ball feeding pipe, a conical opening and a first air cylinder, wherein the first driving assembly is used for driving one of the first rotating rods to rotate, the first clamping assembly is used for clamping steel, the moving block is movably arranged on the machine body in a penetrating mode at two ends of the moving block, the through holes are formed in the moving block at equal intervals, the nozzle is fixedly inserted into the lower end of each through hole, the steel ball feeding pipe is fixedly inserted into the upper end of each through hole, the conical opening is formed in the upper; firstly, steel to be processed is placed on a loading and unloading device, the loading and unloading device is used for loading and unloading the steel, a first shot blasting device is used for shot blasting treatment on the inner wall of the steel in the loading process, a second shot blasting device is used for shot blasting treatment on the outer wall of the steel, a dust removal device is used for collecting dust generated in the shot blasting process, a first clamping assembly clamps the steel and drives the steel to rotate and move the steel to a first arc-shaped plate to rotate, one first rotating rod is driven to rotate through a first driving assembly to drive a first gear and a second gear on the first rotating rod to rotate, the first gear is meshed with a third gear, the second gear is meshed with a fourth gear to drive the second gear and the fourth gear to rotate, and the second gear and the fourth gear are respectively meshed with a first gear and a second gear on an adjacent first rotating rod, thereby drive adjacent first bull stick syntropy and rotate, it rotates a plurality of first bull sticks syntropy to drive on the same principle, the steel ball passes through the steel ball inlet pipe and gets into in the through-hole, the steel ball in the through-hole gets into the nozzle, and strike from the steel of nozzle blowout rotation in-process, through first cylinder drive movable block reciprocating motion, drive a plurality of nozzle reciprocating motion, the steel ball is located many times refraction after the striking and is finally collected by dust collector together with the dust on the first arc, separate steel ball and dust through dust collector, steel ball recycle. According to the invention, firstly, steel to be processed is placed on the loading and unloading device, and the loading and unloading are carried out on the steel through the loading device, so that automatic loading and unloading are realized, the automation degree is high, shot blasting treatment is firstly carried out on the inner wall of the steel in the loading process through the first shot blasting device, the treatment on the inner wall is more comprehensive, shot blasting treatment is carried out on the outer wall of the steel through the second shot blasting device, the treatment on the outer wall is more comprehensive, namely shot blasting treatment is carried out on the steel comprehensively, and dust generated in the shot blasting process is collected through the dust removal device; the first clamping assembly clamps steel and drives the steel to rotate, the steel is moved to the first arc-shaped plate to rotate, one of the first rotating rods is driven to rotate by the first driving assembly, the first gear and the second gear on the first rotating rod are driven to rotate, the first gear is meshed with the third gear, the second gear is meshed with the fourth gear, the second gear and the fourth gear are driven to rotate, the second gear and the fourth gear are respectively meshed with the first gear and the second gear on the adjacent first rotating rod, the adjacent first rotating rods are driven to rotate in the same direction, the plurality of first rotating rods are driven to rotate in the same direction, the steel balls are refracted onto the first rotating rods after impacting on the steel, the guiding effect can be achieved on the steel balls through the arrangement of the rotating first rotating rods and the plurality of second arc-shaped grooves on the rotating first rotating rods, the steel balls can impact the steel balls again, and the sprayed steel balls can impact the steel balls for multiple times through the arrangement of the plurality of first rotating rods, the force of steel ball impact is accelerated through the second arc-shaped groove, so that the force of multiple times of refraction impact on steel is uniform, the depth of pits formed after steel shot blasting is consistent, the efficiency and the quality of shot blasting are greatly improved, meanwhile, mutual collision among the steel balls can be avoided, the service life of the steel balls is prolonged, the distance between the first arc-shaped plate and the steel is gradually reduced from top to bottom, the reduction of the impact force of the steel balls after multiple times of refraction is avoided, namely, the consistency of the force of the multiple times of steel balls impact is ensured, the steel balls in the through holes enter the nozzles through the steel ball feeding pipes, the steel balls in the through holes are ejected from the nozzles to impact the steel in the rotating process, the first air cylinder drives the moving block to move in a reciprocating mode to drive the nozzles to move in a reciprocating mode, the situation that the distance between two adjacent nozzles cannot be ejected is avoided, the steel balls are ejected more, the spraying speed of the steel balls can be accelerated through the arrangement of the steel ball feeding pipe, the through hole and the conical opening, the inner diameter of the through hole is larger than the inner diameter of the steel ball feeding pipe and larger than the inner diameter of the nozzle, and the inner diameter of the steel ball feeding pipe is the same as the inner diameter of the nozzle, so that the steel balls can play an accelerating effect after passing through the three, the force of the steel balls in ejection is improved, namely, the force of the steel balls on the steel materials is impacted, the steel balls are positioned on the first arc-shaped plate after being impacted, and are finally collected together with dust through a dust removal device.

The main component of the degreasing solvent in the step b is trichloroethylene, and a soaking method is adopted during degreasing, wherein the time is 35min, and the temperature is 60 ℃.

The first driving assembly comprises a first driving shaft, a fifth gear, a sixth gear, a seventh gear and a first motor, wherein two ends of the first driving shaft are rotatably arranged on the machine body; through first motor drive seventh gear revolve, seventh gear and sixth gear meshing to drive sixth gear revolve, the fixed cover of sixth gear is located on the first drive shaft, thereby drives first drive shaft and rotates, and the fixed cover of fifth gear is located on the first drive shaft, thereby drives fifth gear revolve, sixth gear and second gear meshing, fifth gear and first gear meshing to fifth gear and sixth gear drive first gear and second gear revolve jointly, and first gear and the first gear rotation of second gear rotation in-process drive first bull stick rotation, finally drive a plurality of first bull sticks syntropy and rotate.

The first clamping assembly comprises a first slide rail, a second slide rail movably arranged on the first slide rail, a second cylinder used for driving the second slide rail to move, a first slide block and a second slide block which are movably arranged on the second slide rail and symmetrically arranged, a first clamping piece fixedly arranged on the first slide block, a second clamping piece fixedly arranged on the second slide block, a first screw rod with two ends rotatably arranged on the second slide rail and respectively arranged on the first slide block and the second slide block, and a second motor used for driving the first screw rod to rotate; one end of the first screw is provided with a positive thread, and the other end of the first screw is provided with a negative thread; the first clamping piece and the second clamping piece are of the same structure, the first clamping piece comprises a first circular plate, a first base fixedly arranged on a first sliding block, a third motor fixedly arranged on the first base and used for driving the first circular plate to rotate, a plurality of first sliding grooves which are distributed on the first circular plate in an annular mode at equal intervals, a first push block movably arranged on the first sliding grooves, a second arc-shaped plate fixedly arranged on the first push block, a second circular plate arranged among the plurality of first sliding grooves, a first connecting rod and a second connecting rod which are distributed in an annular mode at equal intervals, one end of the first connecting rod is rotatably arranged on the second circular plate, the other end of the first connecting rod is rotatably arranged on the first push block, and a fifth cylinder fixedly arranged on the first circular plate and used for driving the second circular plate to move; after the feeding and discharging device conveys steel to the middle of the first clamping piece and the second clamping piece, the second motor drives the first screw rod to rotate, the first slider and the second slider are driven to move relatively close to each other, the first clamping piece and the second clamping piece are driven to move relatively close to each other, the first circular plates on the first clamping piece and the second clamping piece are abutted against two ends of the steel, the second circular plate is driven to move close to the first circular plate through the fifth air cylinder, the plurality of first connecting rods and the plurality of second connecting rods are driven to rotate and move in the moving process of the second circular plate, the first push block on the first sliding chute is driven to move outwards along the axis of the first circular plate, the second arc-shaped plate on the first push block is abutted against the inner wall of the steel, the clamping and fixing work of the steel is completed, the first circular plate is driven to rotate through the third motor, the clamped steel is driven to rotate together, and the second sliding rail is driven to move towards the direction of the first, drive first holder and second holder and its steel on the second slide rail and to first arc orientation removal, make steel can be located first arc.

The feeding and discharging device comprises a feeding box fixedly arranged on the machine body, a guide groove fixedly arranged at the lower end of the feeding box, a hollow pipe, a hole, a plurality of tooth sockets, an eighth gear, a fourth motor, a second pushing block, a third pushing block, two groups of second driving assemblies, a supporting plate, a third air cylinder and two lower sliding plates, wherein the hollow pipe is positioned under the feeding box, the two ends of the hollow pipe are rotatably arranged on the guide groove, the hole is formed in the side wall of the hollow pipe, the tooth sockets are annularly distributed on the hollow pipe at equal intervals, the eighth gear is rotatably arranged on the guide groove and meshed with the tooth sockets, the fourth motor is used for driving the eighth gear to rotate, the second pushing block is movably arranged on the guide groove, the third pushing block is symmetrically and movably arranged on the guide groove, the two groups of second driving assemblies are positioned at the two ends of the second pushing block and the third pushing block; the steel is arranged in the discharging box, an eighth gear is driven to rotate by a fourth motor, the eighth gear is meshed with a tooth socket on the hollow pipe, so that the electric hollow pipe rotates, an opening on the hollow pipe is positioned under the steel, the steel falls into the hollow pipe, shot blasting is performed on the inner wall of the steel falling into the hollow pipe by a first shot blasting device, the hollow pipe is continuously driven to rotate by the fourth motor after the treatment of the inner wall of the steel is completed, the steel in the hollow pipe rolls into the guide groove by self gravity after the opening on the hollow pipe faces the guide groove, and rolls down along the guide groove, the rolled steel is limited by a second push block and a third push block, the supporting plate is driven to ascend by a third cylinder, the limited steel can be positioned on the supporting plate, the second push plate and the third push plate are relatively far away by a second driving assembly, and the steel can follow to descend after the third cylinder drives the supporting plate to descend, after steel descends in-process and is located in the middle of first holder and the second holder, carry out the centre gripping to steel through first holder and second holder, the third cylinder continues to drive the layer board and descends, steel after being held by first holder and second holder can be to first arc orientation removal, the second peening device resets after handling the completion to the steel outer wall, steel after the peening is handled is located directly over the layer board, relax the centre gripping to steel through first centre gripping subassembly, steel can fall on the layer board, the third cylinder continues to drive the layer board and descends, steel on the layer board can be followed its orientation whereabouts after being located down on the slide.

The second driving assembly comprises a first guide rod, a third slide rail, a third slide block, a fourth air cylinder, a third connecting rod and a fourth connecting rod, wherein two ends of the first guide rod are movably arranged on one ends of the second push block and the third push block in a penetrating mode and are fixedly arranged on the guide groove, the third slide rail is positioned above the second push block and the third push block in a fixed mode and is fixedly arranged on the guide groove, the third slide block is movably arranged on the third slide rail, one end of the fourth air cylinder is rotatably arranged on the third slide block, the other end of the fourth air cylinder is rotatably arranged on the second push block, one end of the fourth air cylinder is symmetrically arranged with the third connecting rod, one end of the fourth connecting rod is rotatably arranged; the third sliding block is driven to move downwards through the fourth cylinder, the third connecting rod and the fourth connecting rod are enabled to rotate relatively, the second pushing block and the third pushing block are driven to be relatively far away along the direction of the first guide rod, the two ends of the second pushing block and the third pushing block are driven to be relatively far away through the two groups of second driving assemblies, steel located in the guide grooves is loosened, and limitation on the steel is completed through driving the second pushing block and the third pushing block to be relatively close.

The first shot blasting device comprises a first fixed block fixedly arranged on the machine body, a shot blasting pipe penetrating through the first fixed block and movably arranged on the first fixed block, a spray head fixedly arranged on one end of the shot blasting pipe, a plurality of nozzles distributed on the spray head in an annular shape at equal intervals, a first conical lantern ring and a second conical lantern ring fixedly arranged on the shot blasting pipe, a fourth slide rail fixedly arranged on the machine body, a fourth slide block movably arranged on the fourth slide rail and rotatably penetrating through the shot blasting pipe, a ninth gear fixedly arranged on the shot blasting pipe, a tenth gear rotatably arranged on the fourth slide block in a meshing manner with the ninth gear, a fifth motor for driving the tenth gear to rotate, a second screw rod with two ends rotatably arranged on the fourth slide rail and arranged on the fourth slide block, a sixth motor for driving the second screw rod to rotate, a fifth slide rail fixedly arranged on the machine body, a second fixed block fixedly arranged on the machine, The dust collection pipe is movably arranged on the second fixing block in a penetrating mode, the fifth sliding block is fixedly sleeved on the dust collection pipe and movably arranged on the fifth sliding rail, the third screw rod is rotatably arranged on the fifth sliding rail and arranged on the fifth sliding block at two ends, the seventh motor is used for driving the third screw rod to rotate, the plurality of conical plates are distributed on the inner wall of the dust collection pipe in an equidistant and annular mode, and the cones are located among the plurality of conical plates and are fixedly arranged on the plurality of conical plates at the same time; firstly, a seventh motor drives a third screw rod to rotate to drive a fifth sliding block to move so as to drive a dust absorption pipe and a cone on the dust absorption pipe to move towards a spray head, the seventh motor stops driving after the cone props against the spray head, steel balls enter the spray head through a shot blasting pipe and are sprayed out from a plurality of spray nozzles on the spray head, a fifth motor drives a tenth gear to rotate, the tenth gear is meshed with a ninth gear so as to drive the ninth gear to rotate, the ninth gear is fixedly sleeved on the shot blasting pipe so as to drive the shot blasting pipe to rotate and drive the spray head to rotate, a sixth motor drives a second screw rod to rotate so as to drive a fourth sliding block to move along a fourth sliding rail direction, the spray head moves from one end to the other end of steel, meanwhile, the seventh motor drives the dust absorption pipe to reset, namely the spray head and the cone keep contact and move simultaneously, the steel balls sprayed out of the spray nozzles firstly impact on the inner wall of the steel, the steel balls which impact on the cone body are sucked into the dust suction pipe together with dust.

The dust removal device comprises a dust collection box, a first dust collection port arranged on the dust collection box, an extension plate fixedly arranged at the dust collection port of the dust collection box, a second dust collection port arranged on the dust collection box and positioned at the extension plate, a third arc plate fixedly arranged on the extension plate, an L-shaped plate fixedly arranged on the dust collection box, a U-shaped plate fixedly arranged at the lower end of the L-shaped plate, a third dust collection port arranged on the L-shaped plate, a blanking port arranged on the dust collection box, an inclined plate fixedly arranged in the dust collection box, a plurality of air outlets equidistantly arranged on the inclined plate, an air inlet arranged at the bottom of the dust collection box and a plurality of partition plate groups fixedly arranged in the dust collection box from top to bottom; the adjacent partition plate groups are arranged in a staggered manner, each partition plate group comprises a plurality of first partition plates which are fixedly arranged in the dust collection box at equal intervals, and the number of the first partition plates of the plurality of partition plate groups is gradually reduced from top to bottom; the air suction amount of the third dust suction port is far larger than the air inlet amount of the air inlet; inhale through the third dust absorption mouth, the air that is located the suction box gets into the intracavity that suction box and L template and U template formed through the second dust absorption mouth, steel ball and dust get into the suction box through first dust absorption mouth in, the intracavity injection air that rethread air inlet formed to suction box and swash plate, the air of injection gets into the suction box that is covered with in the first baffle through a plurality of gas outlets on the swash plate, can lead the steel ball that falls into the suction box through the setting of multiunit baffle group, the steel ball can be concentrated in blanking mouth department, and discharge from the blanking mouth.

The invention has the following advantages: at first put into unloader on need processed steel, and carry out material loading and unloading to steel through material loading device, automatic feeding and unloading have been realized, degree of automation is high, carry out shot blasting treatment to the steel inner wall of material loading in-process earlier through first peening device, it is more comprehensive to the inner wall processing, rethread second peening device carries out shot blasting treatment to the outer wall of steel, it is more comprehensive to the outer wall processing, carry out shot blasting treatment to steel promptly comprehensively, collect the dust that the peening in-process produced through dust collector, adopt this peening equipment can handle steel surface comprehensively, and can keep continuously separating steel ball after the peening and dust.

Drawings

Fig. 1 is a first structural schematic diagram of the present invention.

Fig. 2 is a side view of the present invention.

Fig. 3 is an enlarged view of fig. 2 at C.

Fig. 4 is a sectional view taken along line a-a of fig. 2.

Fig. 5 is an enlarged view of fig. 4 at F.

Fig. 6 is a sectional view taken along line B-B of fig. 4.

Fig. 7 is an enlarged view of a portion a in fig. 6.

Fig. 8 is an enlarged view of fig. 7 at B.

Fig. 9 is an enlarged view of fig. 6 at G.

Fig. 10 is a cross-sectional view taken along line C-C of fig. 6.

Fig. 11 is a second structural diagram of the present invention.

Fig. 12 is an enlarged view of fig. 11 at D.

Fig. 13 is an enlarged view of fig. 11 at H.

Fig. 14 is a cross-sectional view taken along line D-D of fig. 6.

Fig. 15 is a partial structural sectional view taken along line E-E in fig. 4.

Fig. 16 is an enlarged view at E in fig. 15.

Fig. 17 is a partial sectional view taken along line F-F in fig. 6.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 17, a galvanization process for steel includes the following steps:

b. degreasing treatment: degreasing the steel by using a degreasing solvent;

the shot blasting equipment in the step a comprises a machine body 1, a feeding and discharging device 2 arranged on the machine body, a first shot blasting device 3 arranged on the machine body and used for surface treatment of the inner wall of the steel, a second shot blasting device 4 used for surface treatment of the outer wall of the steel and a dust removing device 5, wherein the second shot blasting device 4 comprises a first arc-shaped plate 41, a plurality of first arc-shaped grooves 42, a plurality of first rotating rods 43, a plurality of second arc-shaped grooves 44, a first gear 45, a second gear 46, a third gear 47, a fourth gear 48, a third gear is meshed with the second gear, the first gear 48, the second gear 48, the third gear is, The first rotating rod is used for driving one of the first rotating rods to rotate, the first clamping assembly 410 is used for clamping steel, a moving block 411 with two ends penetrating through the machine body movably, a plurality of through holes 412 are formed in the moving block at equal intervals, a nozzle 413 is fixedly inserted into the lower end of each through hole, a steel ball feeding pipe 414 is fixedly inserted into the upper end of each through hole, a conical opening 415 is formed in the upper end of each nozzle, and a first air cylinder 416 is used for driving the moving block to integrally reciprocate; firstly, steel to be processed is placed on the loading and unloading device, and the steel is loaded and unloaded through the loading device, so that automatic loading and unloading are realized, the automation degree is high, shot blasting treatment is firstly carried out on the inner wall of the steel in the loading process through the first shot blasting device, the inner wall is more comprehensively treated, shot blasting treatment is carried out on the outer wall of the steel through the second shot blasting device, the outer wall is more comprehensively treated, namely shot blasting treatment is comprehensively carried out on the steel, dust generated in the shot blasting process is collected through the dust removal device, the shot blasting equipment can comprehensively treat the surface of the steel, and the continuous separation of steel balls and dust after shot blasting treatment can be kept; the first clamping assembly clamps steel and drives the steel to rotate, the steel is moved to the first arc-shaped plate to rotate, one of the first rotating rods is driven to rotate by the first driving assembly, the first gear and the second gear on the first rotating rod are driven to rotate, the first gear is meshed with the third gear, the second gear is meshed with the fourth gear, the second gear and the fourth gear are driven to rotate, the second gear and the fourth gear are respectively meshed with the first gear and the second gear on the adjacent first rotating rod, the adjacent first rotating rods are driven to rotate in the same direction, the plurality of first rotating rods are driven to rotate in the same direction, the steel balls are refracted onto the first rotating rods after impacting on the steel, the guiding effect can be achieved on the steel balls through the arrangement of the rotating first rotating rods and the plurality of second arc-shaped grooves on the rotating first rotating rods, the steel balls can impact the steel balls again, and the sprayed steel balls can impact the steel balls for multiple times through the arrangement of the plurality of first rotating rods, the force of steel ball impact is accelerated through the second arc-shaped groove, so that the force of multiple times of refraction impact on steel is uniform, the depth of pits formed after steel shot blasting is consistent, the efficiency and the quality of shot blasting are greatly improved, meanwhile, mutual collision among the steel balls can be avoided, the service life of the steel balls is prolonged, the distance between the first arc-shaped plate and the steel is gradually reduced from top to bottom, the reduction of the impact force of the steel balls after multiple times of refraction is avoided, namely, the consistency of the force of the multiple times of steel balls impact is ensured, the steel balls in the through holes enter the nozzles through the steel ball feeding pipes, the steel balls in the through holes are ejected from the nozzles to impact the steel in the rotating process, the first air cylinder drives the moving block to move in a reciprocating mode to drive the nozzles to move in a reciprocating mode, the situation that the distance between two adjacent nozzles cannot be ejected is avoided, the steel balls are ejected more, the spraying speed of the steel balls can be accelerated through the arrangement of the steel ball feeding pipe, the through hole and the conical opening, the inner diameter of the through hole is larger than the inner diameter of the steel ball feeding pipe and larger than the inner diameter of the nozzle, and the inner diameter of the steel ball feeding pipe is the same as the inner diameter of the nozzle, so that the steel balls can play an accelerating effect after passing through the three, the force of the steel balls in ejection is improved, namely, the force of the steel balls on the steel materials is impacted, the steel balls are positioned on the first arc-shaped plate after being impacted, and are finally collected together with dust through a dust removal device.

The main component of the degreasing solvent in the step b is trichloroethylene, and a soaking method is adopted during degreasing, the time is 35min, and the temperature is 60 ℃; the oil stain and other dirt on the surface of the steel are removed, and the oil is thoroughly removed.

The first driving assembly 49 comprises a first driving shaft 491, a fifth gear 492 fixedly sleeved at one end of the first driving shaft and meshed with the first gear, a sixth gear 493 fixedly sleeved at the other end of the first driving shaft and meshed with the second gear, a seventh gear 494 meshed with the sixth gear, and a first motor 495 for driving the seventh gear to rotate; through first motor drive seventh gear revolve, seventh gear and sixth gear meshing to make the sixth gear revolve, the fixed cover of sixth gear is located on the first drive shaft, thereby makes the first drive shaft rotate, the fixed cover of fifth gear is located on the first drive shaft, thereby makes the fifth gear revolve, the sixth gear meshes with the second gear, and the fifth gear and the first gear meshing, thereby make fifth gear and sixth gear drive first gear and second gear revolve jointly, and first gear and second gear revolve the in-process drive first bull stick of rotation, finally drive a plurality of first bull sticks syntropy and rotate.

The first clamping assembly 410 comprises a first slide rail 4101, a second slide rail 4102 movably arranged on the first slide rail, a second cylinder 4103 for driving the second slide rail to move, a first slider 4104 and a second slider 4105 which are movably arranged on the second slide rail and symmetrically arranged, a first clamping piece 4106 fixedly arranged on the first slider, a second clamping piece 4107 fixedly arranged on the second slider, a first screw 4108 with two ends rotatably arranged on the second slide rail and respectively arranged on the first slider and the second slider, and a second motor 4109 for driving the first screw to rotate; one end of the first screw is provided with a positive thread, and the other end of the first screw is provided with a negative thread; the first clamping piece and the second clamping piece have the same structure, the first clamping piece 4106 comprises a first circular plate 4110, a first base 4111 fixedly arranged on a first slider, a third motor 4112 fixedly arranged on the first base and used for driving the first circular plate to rotate, a plurality of first sliding grooves 4113 which are distributed on the first circular plate in an equidistant annular manner, a first push block 4114 movably arranged on the first sliding grooves, a second arc-shaped plate 4115 fixedly arranged on the first push block, a second circular plate 4116 arranged among the plurality of first sliding grooves, a first connecting rod 4117 and a second connecting rod 4118 which are distributed in an equidistant annular manner, one end of the first connecting rod is rotatably arranged on the second circular plate, the other end of the first connecting rod is rotatably arranged on the first circular plate, and the fifth cylinder 4119 which is fixedly arranged on the first circular plate and used for driving the second circular plate to move; after the feeding and discharging device conveys steel to the middle of the first clamping part and the second clamping part, the second motor drives the first screw rod to rotate, so that the first sliding block and the second sliding block relatively approach to move, the first clamping part and the second clamping part relatively approach to move, the first circular plates on the first clamping part and the second clamping part prop against two ends of the steel, the fifth cylinder drives the second circular plates to approach to the first circular plates, the plurality of first connecting rods and the plurality of second connecting rods rotate and move in the moving process of the second circular plates, the first push block on the first sliding chute outwards moves along the axis of the first circular plates, the second arc-shaped plate on the first push block props against the inner wall of the steel, the clamping and fixing work of the steel is completed, the two ends of the steel can be sealed under the condition that the steel is fixed through the arrangement, steel balls and dust are prevented from entering the inner wall of the steel, and the first circular plates are driven to rotate by the third motor, the steel that drives the centre gripping rotates together, drives the second slide rail through the second cylinder and removes to first arc direction, drives first holder and second holder on the second slide rail and steel and removes to first arc direction, makes steel can be located first arc.

The feeding and discharging device 2 comprises a feeding box 21 fixed on the machine body, a guide groove 22 fixed at the lower end of the feeding box, a hollow pipe 23 positioned under the feeding box and with two ends rotatably arranged on the guide groove, a hole 24 arranged on the side wall of the hollow pipe, a plurality of tooth sockets 25 annularly distributed at equal intervals and arranged on the hollow pipe, an eighth gear 26 rotatably arranged on the guide groove and meshed with the tooth sockets, and a fourth motor 27 for driving the eighth gear to rotate, the second push block 28 is movably arranged on the guide groove, the third push block 29 is symmetrically and movably arranged on the guide groove relative to the second push block, two groups of second driving components 210 are arranged at two ends of the second push block and the third push block and used for driving the second push block and the third push block to move relatively, a supporting plate 211 is arranged at the middle lower part of the second push block and the third push block, a third air cylinder 212 is used for driving the supporting plate to move up and down, and two lower sliding plates 219 are fixedly arranged on the dust removal device and positioned at two sides of the supporting plate; the steel is arranged in the discharging box, an eighth gear is driven to rotate by a fourth motor, the eighth gear is meshed with a tooth socket on the hollow pipe, so that the electric hollow pipe rotates, an opening on the hollow pipe is positioned under the steel, the steel falls into the hollow pipe, shot blasting is performed on the inner wall of the steel falling into the hollow pipe by a first shot blasting device, the hollow pipe is continuously driven to rotate by the fourth motor after the treatment of the inner wall of the steel is completed, the steel in the hollow pipe rolls into the guide groove by self gravity after the opening on the hollow pipe faces the guide groove, and rolls down along the guide groove, the rolled steel is limited by a second push block and a third push block, the supporting plate is driven to ascend by a third cylinder, the limited steel can be positioned on the supporting plate, the second push plate and the third push plate are relatively far away by a second driving assembly, and the steel can follow to descend after the third cylinder drives the supporting plate to descend, after steel descends in-process and is located in the middle of first holder and the second holder, carry out the centre gripping to steel through first holder and second holder, the third cylinder continues to drive the layer board and descends, steel after being held by first holder and second holder can be to first arc orientation removal, the second peening device resets after handling the completion to the steel outer wall, steel after the peening is handled is located directly over the layer board, relax the centre gripping to steel through first centre gripping subassembly, steel can fall on the layer board, the third cylinder continues to drive the layer board and descends, steel on the layer board can be followed its orientation whereabouts after being located down on the slide.

The second driving assembly 210 comprises a first guide rod 213, a third slide rail 214, a third slide block 215, a fourth cylinder 216, a third connecting rod 217 and a fourth connecting rod 218, wherein two ends of the first guide rod 213 are movably arranged on one end of the second push block and one end of the third push block in a penetrating manner and are fixedly arranged on the guide grooves, the third slide rail 214 is positioned above the middle part of the second push block and the third push block and is fixedly arranged on the guide grooves, the third slide block 215 is movably arranged on the third slide rail, one end of the fourth cylinder 216 is rotatably arranged on the third slide block, the other end of the fourth connecting rod 217 is rotatably arranged on the second push block, one end of the fourth connecting rod is symmetrically arranged with the third connecting rod, one end of the; the third sliding block is driven to move downwards through the fourth cylinder, the third connecting rod and the fourth connecting rod are enabled to rotate relatively, the second pushing block and the third pushing block are driven to be relatively far away along the direction of the first guide rod, the two ends of the second pushing block and the third pushing block are driven to be relatively far away through the two groups of second driving assemblies, steel located in the guide grooves is loosened, and limitation on the steel is completed through driving the second pushing block and the third pushing block to be relatively close.

The first shot blasting device 3 comprises a first fixed block 31 fixedly arranged on the machine body, a shot blasting pipe 32 movably arranged on the first fixed block in a penetrating manner, a spray head 33 fixedly arranged on one end of the shot blasting pipe, a plurality of spray nozzles 34 annularly distributed on the spray head at equal intervals, a first conical lantern ring 35 and a second conical lantern ring 36 fixedly arranged on the shot blasting pipe in a penetrating manner, a fourth slide rail 37 fixedly arranged on the machine body, a fourth slide block 38 movably arranged on the fourth slide rail and rotatably arranged on the shot blasting pipe in a penetrating manner, a ninth gear 39 fixedly sleeved on the shot blasting pipe, a tenth gear rotatably arranged on the fourth slide block in a meshing manner with the ninth gear, a fifth motor 311 for driving the tenth gear to rotate, a second screw 312 with two ends rotatably arranged on the fourth slide rail and arranged on the fourth slide block, a sixth motor 313 for driving the second screw to rotate, and a fifth slide rail 314 fixedly arranged on the machine body, The dust collector comprises a second fixed block 315 fixedly arranged on the machine body, a dust collection pipe 316 movably arranged on the second fixed block in a penetrating manner, a fifth slider 317 fixedly sleeved on the dust collection pipe and movably arranged on a fifth slide rail, a third screw 318 with two ends rotatably arranged on the fifth slide rail and arranged on the fifth slider, a seventh motor 319 for driving the third screw to rotate, a plurality of conical plates 320 which are distributed on the inner wall of the dust collection pipe in an equidistant annular manner, and cones 321 which are positioned among the plurality of conical plates and are simultaneously and fixedly arranged on the plurality of conical plates; firstly, a seventh motor drives a third screw rod to rotate to drive a fifth sliding block to move so as to drive a dust absorption pipe and a cone on the dust absorption pipe to move towards a spray head, the seventh motor stops driving after the cone props against the spray head, steel balls enter the spray head through a shot blasting pipe and are sprayed out from a plurality of nozzles on the spray head, a fifth motor drives a tenth gear to rotate, the tenth gear is meshed with a ninth gear so as to drive the ninth gear to rotate, the ninth gear is fixedly sleeved on the shot blasting pipe so as to drive the shot blasting pipe to rotate and drive the spray head to rotate, a sixth motor drives a second screw rod to rotate so as to drive a fourth sliding block to move along a fourth sliding rail direction, the spray head moves from one end to the other end of steel, even if the spray head moves while rotating, the inner wall of the steel can be subjected to shot blasting more comprehensively, and meanwhile, the seventh motor drives the dust absorption pipe to reset, namely, the steel balls sprayed from the nozzle firstly impact on the inner wall of the steel, then impact on the cone after being refracted by the steel, and the steel balls impacting on the cone and dust are sucked into the dust suction pipe together, so that the influence of collision among the steel balls on shot blasting treatment and service life is avoided.

The dust removing device 5 comprises a dust collection box 51, a first dust collection port 52 arranged on the dust collection box, an extension plate 53 fixedly arranged at the dust collection port of the dust collection box, a second dust collection port 54 arranged on the dust collection box and positioned at the extension plate, a third arc-shaped plate 55 fixedly arranged on the extension plate, an L-shaped plate 56 fixedly arranged on the dust collection box, a U-shaped plate 57 fixedly arranged at the lower end of the L-shaped plate, a third dust collection port 58 arranged on the L-shaped plate, a blanking port 59 arranged on the dust collection box, an inclined plate 510 fixedly arranged in the dust collection box, a plurality of air outlets 511 equidistantly arranged on the inclined plate, an air inlet 512 arranged at the bottom of the dust collection box, and a plurality of partition plate groups 513 fixedly arranged in the dust collection box from top to bottom; the adjacent partition plate groups are arranged in a staggered manner, each partition plate group comprises a plurality of first partition plates 514 which are fixedly arranged in the dust collection box at equal intervals, and the number of the first partition plates of the plurality of partition plate groups is gradually reduced from top to bottom; the air suction amount of the third dust suction port is far larger than the air inlet amount of the air inlet; sucking air through a third dust suction port, allowing air in the dust suction box to enter a cavity formed by the dust suction box, the L-shaped plate and the U-shaped plate through a second dust suction port, allowing steel balls and dust to enter the dust suction box through the first dust suction port, injecting air into the cavity formed by the dust suction box and the inclined plate through an air inlet, allowing the injected air to enter the dust suction box filled with the first partition plates through a plurality of air outlets on the inclined plate, guiding the steel balls falling into the dust suction box through a plurality of groups of partition plate groups, concentrating the steel balls at a blanking port, discharging the steel balls from the blanking port, allowing the steel balls entering the dust suction box to impact through a third arc plate on the extension plate and the extension plate, allowing dust to enter the cavity formed by the dust suction box, the L-shaped plate and the U-shaped plate through a second dust suction port, allowing the steel balls to be rapidly separated from the dust, and prolonging the falling time of the steel balls through the plurality of first partition plates, the steel balls and dust can be separated again by upwards spraying the steel balls in the falling process through the plurality of gas outlets on the inclined plate, the steel balls can be prevented from moving upwards together, the two separation is more thorough, and the accumulation of the dust can be avoided through the arrangement of the U-shaped plate and the position of the third dust absorption port.

The first to seventh motors are commercially available.

Claims

1. A galvanizing process for steel is characterized in that: the method comprises the following steps:

b. degreasing treatment: degreasing the steel by using a degreasing solvent;

c. hot galvanizing treatment: placing the degreased steel into a galvanizing solution tank, and soaking the steel in the solution at 435 ℃ for 15 min;

the shot blasting equipment in the step a comprises an engine body (1), a feeding and discharging device (2) arranged on the engine body, a first shot blasting device (3) arranged on the engine body and used for surface treatment of the inner wall of the steel, a second shot blasting device (4) used for surface treatment of the outer wall of the steel and a dust removing device (5), wherein the second shot blasting device (4) comprises a first arc-shaped plate (41) with two ends fixedly arranged on the engine body, a plurality of first arc-shaped grooves (42) equidistantly arranged on the first arc-shaped plate along the direction of the first arc-shaped plate, a plurality of first rotating rods (43) with two ends rotatably arranged on the engine body and respectively arranged in the plurality of first arc-shaped grooves, a plurality of second arc-shaped grooves (44) annularly arranged on the first rotating rods at equal intervals, a first gear (45) fixedly arranged on one end of the first rotating rods, a second gear (46) fixedly arranged on the other end of the first rotating rods, a third gear (47) respectively meshed with, The steel ball feeding device comprises a fourth gear (48) which is meshed with second gears on two adjacent first rotating rods respectively, a first driving assembly (49) used for driving one of the first rotating rods to rotate, a first clamping assembly (410) used for clamping steel, a moving block (411) with two ends penetrating through the machine body and movably arranged on the machine body, a plurality of through holes (412) arranged on the moving block at equal intervals, a nozzle (413) fixedly inserted at the lower end of the through hole, a steel ball feeding pipe (414) fixedly inserted at the upper end of the through hole, a conical opening (415) arranged at the upper end of the nozzle, and a first air cylinder (416) used for driving the moving block to integrally reciprocate, wherein the distance between the first arc-shaped plate and the steel is gradually reduced from; firstly, steel to be processed is placed on a loading and unloading device, the loading and unloading device is used for loading and unloading the steel, a first shot blasting device is used for shot blasting treatment on the inner wall of the steel in the loading process, a second shot blasting device is used for shot blasting treatment on the outer wall of the steel, a dust removal device is used for collecting dust generated in the shot blasting process, a first clamping assembly clamps the steel and drives the steel to rotate and move the steel to a first arc-shaped plate to rotate, one first rotating rod is driven to rotate through a first driving assembly to drive a first gear and a second gear on the first rotating rod to rotate, the first gear is meshed with a third gear, the second gear is meshed with a fourth gear to drive the second gear and the fourth gear to rotate, and the second gear and the fourth gear are respectively meshed with a first gear and a second gear on an adjacent first rotating rod, thereby drive adjacent first bull stick syntropy and rotate, it rotates a plurality of first bull sticks syntropy to drive on the same principle, the steel ball passes through the steel ball inlet pipe and gets into in the through-hole, the steel ball in the through-hole gets into the nozzle, and strike from the steel of nozzle blowout rotation in-process, through first cylinder drive movable block reciprocating motion, drive a plurality of nozzle reciprocating motion, the steel ball is located many times refraction after the striking and is finally collected by dust collector together with the dust on the first arc, separate steel ball and dust through dust collector, steel ball recycle.

2. A galvanising process for steel according to claim 1, characterised in that: the main component of the degreasing solvent in the step b is trichloroethylene, and a soaking method is adopted during degreasing, wherein the soaking time is 35min, and the temperature is 60 ℃.

3. A galvanising process for steel according to claim 1, characterised in that: the first driving assembly (49) comprises a first driving shaft (491) with two ends rotatably arranged on the machine body, a fifth gear (492) fixedly sleeved at one end of the first driving shaft and meshed with the first gear, a sixth gear (493) fixedly sleeved at the other end of the first driving shaft and meshed with the second gear, a seventh gear (494) meshed with the sixth gear, and a first motor (495) for driving the seventh gear to rotate; through first motor drive seventh gear revolve, seventh gear and sixth gear meshing to drive sixth gear revolve, the fixed cover of sixth gear is located on the first drive shaft, thereby drives first drive shaft and rotates, and the fixed cover of fifth gear is located on the first drive shaft, thereby drives fifth gear revolve, sixth gear and second gear meshing, fifth gear and first gear meshing to fifth gear and sixth gear drive first gear and second gear revolve jointly, and first gear and the first gear rotation of second gear rotation in-process drive first bull stick rotation, finally drive a plurality of first bull sticks syntropy and rotate.

4. A galvanising process for steel according to claim 1, characterised in that: the first clamping assembly (410) comprises a first sliding rail (4101), a second sliding rail (4102) movably arranged on the first sliding rail, a second cylinder (4103) used for driving the second sliding rail to move, a first sliding block (4104) and a second sliding block (4105) which are movably arranged on the second sliding rail and are symmetrically arranged, a first clamping piece (4106) fixedly arranged on the first sliding block, a second clamping piece (4107) fixedly arranged on the second sliding block, a first screw rod (4108) with two ends rotatably arranged on the second sliding rail and respectively arranged on the first sliding block and the second sliding block, and a second motor (4109) used for driving the first screw rod to rotate; one end of the first screw is provided with a positive thread, and the other end of the first screw is provided with a negative thread; the first clamping piece and the second clamping piece are identical in structure, the first clamping piece (4106) comprises a first circular plate (4110), a first base (4111) fixedly arranged on a first sliding block, a third motor (4112) fixedly arranged on the first base and used for driving the first circular plate to rotate, a plurality of first sliding grooves (4113) which are distributed on the first circular plate in an equidistant annular mode, a first push block (4114) movably arranged on the first sliding grooves, a second arc-shaped plate (4115) fixedly arranged on the first push block, a second circular plate (4116) arranged in the middle of the first sliding grooves, a first connecting rod (4117) and a second connecting rod (4118) which are distributed in an equidistant annular mode, one end of the first connecting rod is rotatably arranged on the second circular plate, the other end of the first connecting rod is rotatably arranged on the first push block, and a fifth cylinder (4119) fixedly arranged on the first circular plate and used for driving the second circular plate to; after the feeding and discharging device conveys steel to the middle of the first clamping piece and the second clamping piece, the second motor drives the first screw rod to rotate, the first slider and the second slider are driven to move relatively close to each other, the first clamping piece and the second clamping piece are driven to move relatively close to each other, the first circular plates on the first clamping piece and the second clamping piece are abutted against two ends of the steel, the second circular plate is driven to move close to the first circular plate through the fifth air cylinder, the plurality of first connecting rods and the plurality of second connecting rods are driven to rotate and move in the moving process of the second circular plate, the first push block on the first sliding chute is driven to move outwards along the axis of the first circular plate, the second arc-shaped plate on the first push block is abutted against the inner wall of the steel, the clamping and fixing work of the steel is completed, the first circular plate is driven to rotate through the third motor, the clamped steel is driven to rotate together, and the second sliding rail is driven to move towards the direction of the first, drive first holder and second holder and its steel on the second slide rail and to first arc orientation removal, make steel can be located first arc.

5. A galvanising process for steel according to claim 1, characterised in that: unloader (2) including fixed blowing case (21) of locating on the organism, fixed guide way (22) of locating blowing case lower extreme department, be located under the blowing case and both ends rotate and locate hollow tube (23) on the guide way, locate trompil (24) on the hollow tube lateral wall, equidistance annular distribution locates a plurality of tooth's sockets (25) on the hollow tube, rotate locate on the guide way and with eight gear (26) of tooth's socket meshing, be used for driving eighth gear pivoted fourth motor (27), second ejector pad (28) on the guide way is located to the portable third ejector pad (29) of locating on the guide way with second ejector pad symmetry, be located two sets of second drive assembly (210) that second ejector pad and third ejector pad both ends were used for driving the two relative movement, locate layer board (211) of below in second ejector pad and the third ejector pad, a third cylinder (212) that is used for driving the layer board and reciprocates, Two lower sliding plates (219) which are fixedly arranged on the dust removing device and positioned at two sides of the supporting plate; the steel is arranged in the discharging box, an eighth gear is driven to rotate by a fourth motor, the eighth gear is meshed with a tooth socket on the hollow pipe, so that the electric hollow pipe rotates, an opening on the hollow pipe is positioned under the steel, the steel falls into the hollow pipe, shot blasting is performed on the inner wall of the steel falling into the hollow pipe by a first shot blasting device, the hollow pipe is continuously driven to rotate by the fourth motor after the treatment of the inner wall of the steel is completed, the steel in the hollow pipe rolls into the guide groove by self gravity after the opening on the hollow pipe faces the guide groove, and rolls down along the guide groove, the rolled steel is limited by a second push block and a third push block, the supporting plate is driven to ascend by a third cylinder, the limited steel can be positioned on the supporting plate, the second push plate and the third push plate are relatively far away by a second driving assembly, and the steel can follow to descend after the third cylinder drives the supporting plate to descend, after steel descends in-process and is located in the middle of first holder and the second holder, carry out the centre gripping to steel through first holder and second holder, the third cylinder continues to drive the layer board and descends, steel after being held by first holder and second holder can be to first arc orientation removal, the second peening device resets after handling the completion to the steel outer wall, steel after the peening is handled is located directly over the layer board, relax the centre gripping to steel through first centre gripping subassembly, steel can fall on the layer board, the third cylinder continues to drive the layer board and descends, steel on the layer board can be followed its orientation whereabouts after being located down on the slide.

6. A galvanising process for steel according to claim 5, characterised in that: the second driving assembly (210) comprises a first guide rod (213) with two ends movably penetrating through one end of the second pushing block and one end of the third pushing block and fixedly arranged on the guide groove, a third slide rail (214) positioned above the middle part of the second pushing block and the third pushing block and fixedly arranged on the guide groove, a third slide block (215) movably arranged on the third slide rail, a fourth cylinder (216) used for driving the third slide block to move, a third connecting rod (217) with one end rotatably arranged on the third slide block and the other end rotatably arranged on the second pushing block, and a fourth connecting rod (218) which is symmetrically arranged with the third connecting rod, one end rotatably arranged on the third slide block and the other end rotatably arranged on the third pushing block; the third sliding block is driven to move downwards through the fourth cylinder, the third connecting rod and the fourth connecting rod are enabled to rotate relatively, the second pushing block and the third pushing block are driven to be relatively far away along the direction of the first guide rod, the two ends of the second pushing block and the third pushing block are driven to be relatively far away through the two groups of second driving assemblies, steel located in the guide grooves is loosened, and limitation on the steel is completed through driving the second pushing block and the third pushing block to be relatively close.

7. A galvanising process for steel according to claim 1, characterised in that: the first shot blasting device (3) comprises a first fixed block (31) fixedly arranged on a machine body, a shot blasting pipe (32) movably arranged on the first fixed block in a penetrating mode, a spray head (33) fixedly arranged on one end of the shot blasting pipe, a plurality of nozzles (34) annularly distributed at equal intervals and arranged on the spray head, a first conical lantern ring (35) and a second conical lantern ring (36) fixedly arranged on the shot blasting pipe, a fourth sliding rail (37) fixedly arranged on the machine body, a fourth sliding block (38) movably arranged on the fourth sliding rail and rotatably arranged on the shot blasting pipe in a penetrating mode, a ninth gear (39) fixedly arranged on the shot blasting pipe, a tenth gear arranged on the fourth sliding block in a meshing mode with the ninth gear, a fifth motor (311) used for driving the tenth gear to rotate, second screw rods (312) rotatably arranged on the fourth sliding rail and arranged on the fourth sliding block at two ends, a sixth motor (313) used for driving the second, The dust collector comprises a fifth slide rail (314) fixedly arranged on the machine body, a second fixed block (315) fixedly arranged on the machine body, a dust collection pipe (316) movably arranged on the second fixed block in a penetrating manner, a fifth slide block (317) fixedly sleeved on the dust collection pipe and movably arranged on the fifth slide rail, a third screw rod (318) with two ends rotatably arranged on the fifth slide rail and arranged on the fifth slide block, a seventh motor (319) used for driving the third screw rod to rotate, a plurality of conical plates (320) which are distributed on the inner wall of the dust collection pipe in an annular manner at equal intervals, and cones (321) which are positioned among the plurality of conical plates and are simultaneously and fixedly arranged on the plurality of; firstly, a seventh motor drives a third screw rod to rotate to drive a fifth sliding block to move so as to drive a dust absorption pipe and a cone on the dust absorption pipe to move towards a spray head, the seventh motor stops driving after the cone props against the spray head, steel balls enter the spray head through a shot blasting pipe and are sprayed out from a plurality of spray nozzles on the spray head, a fifth motor drives a tenth gear to rotate, the tenth gear is meshed with a ninth gear so as to drive the ninth gear to rotate, the ninth gear is fixedly sleeved on the shot blasting pipe so as to drive the shot blasting pipe to rotate and drive the spray head to rotate, a sixth motor drives a second screw rod to rotate so as to drive a fourth sliding block to move along a fourth sliding rail direction, the spray head moves from one end to the other end of steel, meanwhile, the seventh motor drives the dust absorption pipe to reset, namely the spray head and the cone keep contact and move simultaneously, the steel balls sprayed out of the spray nozzles firstly impact on the inner wall of the steel, the steel balls which impact on the cone body are sucked into the dust suction pipe together with dust.

8. A galvanising process for steel according to claim 1, characterised in that: the dust removal device (5) comprises a dust collection box (51), a first dust collection port (52) arranged on the dust collection box, an extension plate (53) fixedly arranged at the dust collection port of the dust collection box, a second dust collection port (54) arranged on the dust collection box at the extension plate, a third arc-shaped plate (55) fixedly arranged on the extension plate, an L-shaped plate (56) fixedly arranged on the dust collection box, a U-shaped plate (57) fixedly arranged at the lower end of the L-shaped plate, a third dust collection port (58) arranged on the L-shaped plate, a blanking port (59) arranged on the dust collection box, an inclined plate (510) fixedly arranged in the dust collection box, a plurality of air outlets (511) equidistantly arranged on the inclined plate, an air inlet (512) arranged at the bottom of the dust collection box, and a plurality of partition plate groups (513) fixedly arranged in the; the adjacent partition plate groups are arranged in a staggered mode, each partition plate group comprises a plurality of first partition plates (514) which are fixedly arranged in the dust collection box at equal intervals, and the number of the first partition plates of the multiple groups of partition plate groups is gradually reduced from top to bottom; the air suction amount of the third dust suction port is far larger than the air inlet amount of the air inlet; inhale through the third dust absorption mouth, the air that is located the suction box gets into the intracavity that suction box and L template and U template formed through the second dust absorption mouth, steel ball and dust get into the suction box through first dust absorption mouth in, the intracavity injection air that rethread air inlet formed to suction box and swash plate, the air of injection gets into the suction box that is covered with in the first baffle through a plurality of gas outlets on the swash plate, can lead the steel ball that falls into the suction box through the setting of multiunit baffle group, the steel ball can be concentrated in blanking mouth department, and discharge from the blanking mouth.