Nitrogen wiping pressure air knife

Abstract

The nitrogen wiping pressure air knife comprises an air pipe, a base, a bottom frame and an air knife unit, the base is arranged at the lower end of the air pipe, the bottom frame is arranged in the base in a left-right adjustable mode and comprises an air box and supporting plates on the two sides of the air box, and the air box is communicated with the air pipe; one side of the air box is communicated with a ventilation pipe, an air knife unit is arranged between the two supporting plates in a front-back adjustable mode, locking bolts are arranged at the ends of the supporting plates, and the locking bolts are matched with the ventilation pipe to clamp the air knife unit; the air knife unit comprises a front knife body and a rear knife body, the front knife body comprises a knife shell and a knife core, the knife core is vertically and elastically connected in the knife shell, the knife shell and the knife core define an air cavity, and the lower end of the air cavity is an air outlet; the air cavities between the front cutter body and the rear cutter body are communicated, cutter cores of the front cutter body and the rear cutter body define a threading hole, the air outlet is communicated with the threading hole, and the other end of the ventilation pipe penetrates into the front cutter body and is communicated with the ventilation cavity. The air knife unit can be conveniently maintained and cleaned, the position of the air knife unit can be adjusted, and it is guaranteed that a steel wire is always located in the center of a threading hole.

Description

Technical Field

[0001] The invention relates to the technical field of galvanizing air knives, in particular to a nitrogen wiping pressure air knife. Background Art

[0002] The purpose of galvanizing steel wire is to reduce corrosion losses, and hot-dip galvanizing is one of the methods. Specifically, the steel wire in continuous production and operation passes through the zinc pot and is immersed in zinc liquid at hundreds of degrees, which causes the zinc layer to adhere to the surface of the steel wire. After the steel wire comes out of the zinc pot, the zinc layer thickness is controlled by nitrogen wiping method, that is, the zinc liquid on the surface of the steel wire is wiped by nitrogen blowing zinc at the place where the steel wire comes out of the zinc pot.

[0003] The final actuator of nitrogen zinc blowing is the air knife. The steel wire passes through the air knife vertically upwards. Nitrogen with a certain pressure enters the air knife to generate a circular jet airflow, which can evenly blow away the excess zinc liquid on the surface of the steel wire and return the zinc liquid to the zinc pot, thereby achieving the effect of controlling the thickness of the zinc layer and ensuring the smoothness of the zinc layer surface.

[0004] Conventional air knives have the following problems when used: 1. When the airflow sprays the zinc liquid, a small amount of splashing zinc slag will be generated. The zinc slag adheres to the inner wall of the air knife, which not only blocks the air outlet of the air knife and makes it difficult to form a circular uniform airflow, affecting the uniformity of the zinc layer thickness and the surface quality, but also hinders the passage of the airflow in the internal cavity of the air knife, affecting the normal application of the air knife. For example, patent publication number CN206244863U discloses a detachable steel wire cleaning device, in which the cleaning seat and the cleaning core are detachable structures, and an annular air cavity is formed between the cleaning seat and the cleaning core. The air cavity can be opened, thereby cleaning the adhered zinc liquid and replacing parts, but the cleaning seat and the cleaning core are fixed structures, and it is difficult to conveniently pass the steel wire through them.

[0005] 2. When the steel wire passes through the air knife, it must be ensured that the steel wire is in the center of the air outlet of the air knife, so as to ensure that the zinc liquid is evenly blown on the surface of the steel wire. However, the air knife is installed on the galvanizing equipment, and the vibration of the equipment operation will be transmitted to the air knife, and the air knife may be offset, so that the steel wire moves relative to the air knife, and it is difficult to ensure that the steel wire is in the center of the air knife. Moreover, after the galvanizing equipment has been running for a certain period of time, it is also required to adjust the position of the steel wire in the air knife to ensure that the steel wire is in the center of the air knife. Summary of the invention

[0006] In order to solve the problem that the conventional air knife structure is relatively fixed, which makes it difficult to flexibly adjust the air knife posture and inconvenience to clean the inside of the air knife, the present invention provides a nitrogen wiping pressure air knife, and optimizes the air knife structure to a split design, which is convenient for cleaning the inside of the air knife. At the same time, on the basis of a certain steel wire running path, the air knife can be adjusted forward, backward, left and right, thereby ensuring that the steel wire is in the center position of the air knife, thereby ensuring the uniformity of blowing on the steel wire.

[0007] To achieve the above object, the technical solution adopted by the present invention is: A nitrogen wiping pressure air knife, used for steel wire galvanizing control, comprises an air pipe, a base, a chassis and an air knife unit, the upper end of the air pipe is connected with an air source to provide nitrogen for the air pipe, the lower end of the air pipe is provided with the base, the base is adjustable left and right inside the base, and the chassis is convenient for left and right movement and fixation of the chassis, the chassis comprises an air box and support plates arranged on both sides of the air box, the support plates extend horizontally out of the base, the air box is placed in the base and slides left and right, and it is convenient to drive the support plates to move together, the air box is connected with the air pipe upward, and it is convenient to transport nitrogen to the air box; A vent pipe is threadedly connected to one side of the air box, one end of the vent pipe extends into the air box, and the other end passes through the base to extend outward, and nitrogen is introduced into the vent pipe, which is arranged between the two support plates; the air knife unit is adjustable front and back between the two support plates, so that the air knife unit can move forward and backward, and a locking bolt is provided at the end of the support plate, and the locking bolt cooperates with the vent pipe to clamp the air knife unit front and back, so as to facilitate the fixation of the air knife unit; The air knife unit comprises a front knife body and a rear knife body with the same structure, the front knife body comprises a knife shell and a knife core, the knife shell is elastically connected with the knife core up and down, the knife shell and the knife core together form an air cavity, the air cavity is a conical cavity with a larger upper part and a smaller lower part, which increases the air flow pressure, the lower end of the air cavity is a semi-circular air outlet, the air outlet is arranged obliquely downward, which improves the ability of the air flow to blow the zinc liquid, and the distance between the upper and lower ends of the air outlet is adjustable, which is convenient for controlling the thickness of the zinc layer on the surface of the steel wire; The cross-section of the front blade body and the rear blade body after being connected and assembled is round inside and square outside, the air cavity between the front blade body and the rear blade body is connected, the blade cores of the front blade body and the rear blade body are surrounded by a cylindrical threading hole, the air outlet is connected to the threading hole, and the other end of the ventilation pipe penetrates into the front blade body and is connected to the air cavity, so that nitrogen is conveniently supplied to the air cavity and the nitrogen is ejected from the air outlet.

[0008] Furthermore, the trachea is a columnar tube body, and an air joint is connected to the upper end of the trachea to facilitate connection with the air source. The air joint is arranged perpendicular to the trachea, and the air joint passes through the trachea. The trachea separates the air joint into a front tube body and a rear tube body. The rear tube body, trachea and front tube body are connected in sequence, and the front tube body is connected to the air source.

[0009] Furthermore, the gas joint is internally threaded with an adjusting bolt, which extends from the rear tube body through the air pipe and into the front tube body, and the end of the adjusting bolt extending into the gas joint is hollow, and the side wall of the adjusting bolt is evenly provided with a plurality of air holes in an annular direction, and the front tube body is connected to the air pipe through the air holes. By turning the adjusting bolt, the opening of the air hole is changed, so as to facilitate the control of the intake amount of nitrogen.

[0010] Furthermore, the base includes a bottom cover and a bottom plate, the bottom cover is a rectangular cover body, the cross-section of the bottom cover is larger than the air pipe, an air intake ring is arranged on the top of the bottom cover, the air intake ring passes through the bottom cover and is connected with the air pipe; the middle parts of the front and rear sides of the bottom cover extend vertically downward to form front and rear extension sections, and the bottom plate is bolted between the bottoms of the front and rear extension sections.

[0011] Furthermore, the air box is a rectangular box body, which is placed between the bottom cover and the bottom plate, so that the air box can be restricted up and down. The cross-section of the air box is smaller than the bottom cover, so that the air box can move left and right inside the bottom cover. The upper surface of the air box is tightly against the inner top surface of the bottom cover, and the lower surface of the air box is tightly against the bottom plate. Side bolts for moving the air box are arranged on the left and right sides of the bottom cover, so that the air box can be driven left and right. Bottom bolts for supporting the air box are arranged on the bottom plate, so that the air box can be lifted up.

[0012] Furthermore, an air receiving port is provided above the air box, and the air intake ring passes downward through the air receiving port and communicates with the air box. The cross section of the air receiving port is larger than that of the air intake ring, and the air intake ring slides left and right in the air receiving port. The ventilation pipe is a hollow externally threaded pipe, which is arranged perpendicular to the trachea. One end of the ventilation pipe passes through the rear extension section and is threadedly connected to the air box. The rear extension section is also provided with a long hole for the ventilation pipe to pass through to prevent interference with the movement of the ventilation pipe.

[0013] Furthermore, support blocks are provided on both sides of the outside of the knife housing, and the knife housing is supported on the support plates through the support blocks, so as to facilitate supporting the front knife body and the rear knife body on the support plates. The two support plates clamp the knife housing, and the interior of the knife housing is a hollow cavity. The longitudinal section of the hollow cavity decreases from top to bottom and then expands. The inner wall of the knife housing includes an outer platform stage, an outer conical section, an outer outlet section, a transition section and a diffusion section arranged from top to bottom.

[0014] Furthermore, the knife core is arranged in the knife housing, and the outer wall of the knife core includes an inner platform stage, an inner conical section and an inner outlet section which are arranged in sequence from top to bottom, the inner platform stage and the outer platform stage fit together, the inner platform stage rests on the outer platform stage, there is a gap between the inner conical section and the outer conical section to form the air cavity, and there is a gap between the inner outlet section and the outer outlet section to form the air outlet.

[0015] Furthermore, a height bolt is provided between the blade core and the blade housing, and there are at least two height bolts on the front blade body and the rear blade body, and the height bolts vertically pass through the inner stage of the blade core and the outer conical section of the blade housing for threaded connection, and a compression spring is also sleeved on the height bolt, and the compression spring is hidden in the inner stage, and the compression spring is tightly pressed between the inner stage of the blade core and the outer stage of the blade housing. Adjusting the height bolt can conveniently change the gap size of the air outlet.

[0016] Furthermore, a stepped through hole is provided in the middle of the blade housing of the front blade body, and the vent pipe is connected with the air cavity through the stepped through hole, and the end of the vent pipe is against the stepped through hole, and the vent pipe does not extend into the air cavity; A locking hole is also provided on the rear side of the blade shell of the rear blade body. Each support plate end is bent inwardly and connected with a locking bolt. The locking bolt abuts against the locking hole to facilitate fixing of the air knife unit.

[0017] Through the above technical solution, the beneficial effects of the present invention are: The structure of the present invention is reasonably designed. The entire pressure air knife is installed on the galvanizing equipment through an air pipe and connected to the air source through an air joint to realize the supply of nitrogen with a certain pressure. An adjusting bolt is provided in the air joint, and the nitrogen intake can be conveniently controlled by turning the adjusting bolt. The air pipe, air box, vent pipe and air knife unit are connected in sequence, and the air source can be supplied to the air knife unit.

[0018] The present invention sets a base at the bottom of the air pipe, and the base is a split structure, which is convenient for the bottom frame to be installed in the base. The air box in the bottom frame can move left and right in the base, and the movement of the air box is controlled and fixed by the side bolts. When the air box moves, the support plate can move left and right together, and there is an air knife unit on the support plate, which is convenient for driving the air knife unit to move.

[0019] The air box of the present invention is connected to the air knife unit through a vent pipe, and the vent pipe and the air box are threadedly connected, so that the front and rear positions of the air knife unit on the support plate can be adjusted. The air box can drive the air knife unit to adjust its position left and right, so that the steel wire can be ensured to be in the center of the air knife unit, and the uniformity of nitrogen blowing can be ensured. On the basis of being supported by the support plate, the air knife unit also adopts a three-point fixing structure, and the air knife unit is restricted by the vent pipe. At the same time, two locking bolts are tightly pressed against the air knife unit, thereby clamping the air knife unit to ensure that the air knife unit is reliably fixed on the support plate.

[0020] The air knife unit of the present invention is a split structure, including a front knife body and a rear knife body, each knife body includes a knife shell and a knife core, and the knife core is elastically mounted on the knife shell, so that the gap of the air outlet of the entire air knife unit is adjustable, and the thickness of the zinc layer can be controlled. The entire air knife unit is composed of four components, namely two knife shells and two knife cores. The knife shells and the knife cores can be disassembled and washed, which is convenient for comprehensive cleaning of the inner wall and the outside of the air knife unit, avoiding zinc slag blocking the air outlet, and ensuring the quality of nitrogen wiping. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a front view of a nitrogen wiping pressure air knife of the present invention. The arrow in the figure indicates that the steel wire of the zinc pot passes through the center of the air knife unit and runs vertically upward.

[0022] Figure 2The invention discloses a nitrogen wiping pressure air knife. Figure 1 Cross-sectional view of the adjusting bolt in the AA direction, with the arrow pointing to the direction of airflow.

[0023] Figure 3 The invention discloses a nitrogen wiping pressure air knife. Figure 1 Top view of the air knife unit in the middle BB direction.

[0024] Figure 4 It is an axonometric view of an air knife unit of a nitrogen wiping pressure air knife according to the present invention.

[0025] Figure 5 The invention discloses a nitrogen wiping pressure air knife. Figure 4 sectional view of .

[0026] Figure 6 The present invention is a cross-sectional view of the installation of a base and a base frame of a nitrogen wiping pressure air knife.

[0027] Figure 7 The present invention is a schematic diagram of the disassembly of a base and a base frame of a nitrogen wiping pressure air knife.

[0028] Figure 8 The present invention is a schematic diagram of the disassembly of the front blade body, the rear blade body and the base frame of a nitrogen wiping pressure air knife.

[0029] Fig. 9 The present invention is a schematic diagram of the installation of a knife core and a knife shell of a nitrogen wiping pressure air knife. The arrow direction in the figure indicates the direction of the air flow sprayed through the air outlet.

[0030] Fig.10 The utility model is a schematic diagram of the separation of the knife core and the knife shell of a nitrogen wiping pressure air knife of the present invention.

[0031] The numbers in the attached drawings are: 1 air pipe, 2 base, 201 bottom cover, 202 bottom plate, 3 bottom frame, 301 air box, 302 support plate, 4 air knife unit, 41 front knife body, 42 rear knife body, 5 air joint, 51 front pipe body, 52 rear pipe body, 6 adjustment bolt, 7 air hole, 8 air inlet ring, 9 air receiving port, 10 side bolt, 11 sealing ring, 12 bottom bolt, 13 threading hole, 14 knife shell, 141 outer stage, 142 Outer conical section, 143 outer outlet section, 144 transition section, 145 diffusion section, 15 knife core, 151 inner stage, 152 inner conical section, 153 inner outlet section, 16 air cavity, 17 air outlet, 18 height bolt, 19 threaded hole, 20 compression spring, 21 stepped hole, 22 positioning hole, 23 ventilation pipe, 24 long hole, 25 stepped through hole, 26 support block, 27 locking bolt, 28 locking hole, 29 diffusion hole. DETAILED DESCRIPTION

[0032] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings: As shown Figure 1 to Figure 10 in the figure, a nitrogen wiping pressure air knife is used for the control of wire galvanization, mainly to control the thickness of the galvanized layer on the wire surface. The pressure air knife includes an air pipe 1, a base 2, a chassis 3 and an air knife unit 4. The air pipe 1 is a prismatic tube body with a closed upper end and an open lower end. The upper end of the air pipe 1 is connected to the galvanizing equipment by bolts, realizing the installation and fixation of the air pipe 1. The installation structure of the air pipe 1 is not shown in the figure.

[0033] The upper end of the air pipe 1 is also connected to a gas source. The gas source adopts a nitrogen gas pipeline with a certain pressure. The air pipe 1 is connected to the nitrogen gas pipeline, so as to supply nitrogen gas to the air pipe 1. Specifically, the upper end of the air pipe 1 is connected to an air joint 5. The air joint 5 is arranged perpendicular to the air pipe 1. The air pipe 1 is connected to the gas source through the air joint 5. Nitrogen gas enters the air pipe 1 through the air joint 5, as shown Figure 1 in the figure.

[0034] In order to adjust the nitrogen gas intake, the air joint 5 is an internally threaded tube body. At the same time, the air joint 5 passes through the air pipe 1. The air pipe 1 divides the air joint 5 into a front tube body 51 and a rear tube body 52. The length of the rear tube body 52 is less than that of the front tube body 51. The rear tube body 52, the air pipe 1 and the front tube body 51 are connected in sequence. The front tube body 51 is connected to the gas source. At the same time, an adjusting bolt 6 is internally threaded to the air joint 5. One end of the adjusting bolt 6 extending into the air joint 5 has a hollow structure inside. A plurality of air holes 7 are evenly arranged circumferentially on the side wall of the adjusting bolt 6. The air holes 7 are waist-shaped holes, and the air holes 7 are connected to the hollow structure inside the adjusting bolt 6.

[0035] When the adjusting bolt 6 is installed, the adjusting bolt 6 passes through the air pipe 1 from the rear tube body 52 and extends into the front tube body 51. The front tube body 51 is connected to the air pipe 1 through the air holes 7. In this way, nitrogen gas first enters the front tube body 51, then enters the inside of the adjusting bolt 6, and then passes through the air holes 7 and is connected to the air pipe 1. By turning the adjusting bolt 6, the length of the air holes 7 in the air pipe 1 can be adjusted, and then the opening degree of the air holes 7 can be adjusted to achieve the purpose of controlling the nitrogen gas intake, as shown Figure 2 in the figure.

[0036] A base 2 is arranged at the lower end of the air pipe 1. The base 2 is fixedly connected to the air pipe 1. The base 2 includes a bottom cover 201 and a bottom plate 202. The bottom cover 201 is a rectangular cover body. The cross-section of the bottom cover 201 is larger than that of the air pipe 1. The cross-section of the bottom cover 201 is an inverted "U" shape. The upper end of the bottom cover 201 is closed and the lower end is open. When the bottom cover 201 is installed, the upper end of the bottom cover 201 is connected and fixed to the air pipe 1. Thus, the bottom cover 201 can close the lower end of the air pipe 1. At the same time, an intake ring 8 is arranged on the top of the bottom cover 201. The intake ring 8 penetrates through the bottom cover 201 and is connected to the air pipe 1, so that the nitrogen gas in the air pipe 1 can be led out through the intake ring 8, as shown Figure 3 in the figure.

[0037] When the bottom plate 202 is installed, the middle parts of the front and rear sides of the bottom cover 201 extend vertically downward to form front and rear extension sections. Figure 7 As shown, the front and rear side walls of the bottom cover 201 are respectively connected to the corresponding front and rear extension sections below to form an integrated "T"-shaped structure, and a bottom plate 202 is bolted between the bottoms of the front and rear extension sections. The lengths of the front and rear extension sections and the bottom plate 202 are both smaller than the length of the bottom cover 201.

[0038] The base 2 is provided with a bottom frame 3 which can be adjusted left and right, and the bottom frame 3 can move left and right in the base 2. The bottom frame 3 includes an air box 301 and support plates 302 arranged on both sides of the air box 301. The air box 301 is a closed rectangular box body. The air box 301 is placed in the base 2 and slides left and right. Specifically, the air box 301 is placed between the bottom cover 201 and the bottom plate 202. The cross section of the air box 301 is smaller than the bottom cover 201. The length of the air box 301 in the left and right direction is greater than the length of the front and rear extension sections in the left and right directions. The lower parts of the left and right sides of the air box 301 extend out of the bottom cover 201 and are connected to one end of the support plate 302, so that the air box 301 can move left and right in the bottom cover 201.

[0039] The air box 301 is connected to the air pipe 1 upward, and then the nitrogen can flow downward into the air box 301. Specifically, an air receiving port 9 is provided on the top of the air box 301, and the air intake ring 8 passes downward through the air receiving port 9 and communicates with the air box 301. Since the air box 301 needs to move left and right, the cross section of the air receiving port 9 is larger than the air intake ring 8, so that the air intake ring 8 can slide left and right in the air receiving port 9. The nitrogen in the air pipe 1 flows downward into the air box 301 through the air intake ring 8.

[0040] When installing the gas box 301, first remove the bottom plate 202, put the gas box 301 into the bottom cover 201 from bottom to top, and then install the bottom plate 202 with bolts under the bottom cover 201. Use the cooperation between the bottom plate 202 and the bottom cover 201 to arrange the gas box 301 in the base 2, and the gas box 301 can move left and right in the base 2. After the gas box 301 is installed, the upper surface of the gas box 301 is tightly against the inner top surface of the bottom cover 201, and the lower surface of the gas box 301 is tightly against the bottom plate 202, preventing the gas box 301 from moving up and down, and the gas box 301 can only move left and right.

[0041] In order to realize the left and right movement of the gas box 301, side bolts 10 for moving the gas box 301 are arranged on the left and right sides of the bottom cover 201. By twisting the side bolts 10 on one side, the gas box 301 can be pushed to the other side. After the two side bolts 10 are tightened at the same time, the gas box 301 can be clamped and fixed, thereby fixing the position of the gas box 301.

[0042] In order to achieve airtightness when installing the gas box 301, a sealing ring 11 is arranged on the top surface of the gas box 301, and the sealing ring 11 is arranged outside the air receiving port 9. At the same time, a bottom bolt 12 for supporting the gas box 301 is arranged on the bottom plate 202. Tightening the bottom bolt 12 can lift the gas box 301 upward, and then the sealing ring 11 is pressed against the inner surface of the bottom cover 201 to ensure reliable sealing. Figure 6 shown.

[0043] The support plates 302 on both sides of the air box 301 extend horizontally outward from the base 2, and a certain distance is maintained between the two support plates 302. When the air box 301 moves, the support plates 302 are driven to move left and right together. An air knife unit 4 is arranged between the two support plates 302, and the air knife unit 4 can move forward and backward on the support plates 302. The air knife unit 4 is the final actuator of the entire pressure air knife. Nitrogen will eventually flow into the air knife unit 4, so the air box 301 and the air knife unit 4 are connected, such as Figure 5 shown.

[0044] The air knife unit 4 is a cylindrical body with a round inner circle and a square outer circle. The center of the air knife unit 4 is a threading hole 13. The galvanized steel wire passes through the threading hole 13 in the center of the air knife unit 4. The air knife unit 4 sprays high-pressure nitrogen to evenly wipe the steel wire. The air knife unit 4 is a symmetrically arranged two-petal structure. The air knife unit 4 includes a front blade body 41 and a rear blade body 42 with the same structure. The front blade body 41 and the rear blade body 42 are connected and assembled to form a cross-section with a round inner circle and a square outer circle. Figure 4 and Figure 8 shown.

[0045] In this embodiment, the front blade body 41 includes a blade housing 14 and a blade core 15. The blade housing 14 has a hollow cavity inside, and the longitudinal section of the hollow cavity decreases from top to bottom and then expands. The outer wall of the blade housing 14 is rectangular and the inner wall is semicircular. Since the blade housing 14 has a certain height, the semicircular size of the inner wall of the blade housing 14 is different from top to bottom. The inner wall of the knife shell 14 includes an outer platform stage 141, an outer conical section 142, an outer outlet section 143, a transition section 144 and a diffusion section 145 arranged in sequence from top to bottom; the outer wall of the knife shell 14 is consistent and is rectangular, and the outer platform stage 141, the outer conical section 142, the outer outlet section 143, the transition section 144 and the diffusion section 145 are semicircular in different sizes, and the outer platform stage 141 is a step with an L-shaped side wall; the outer conical section 142 is a cone with a larger upper part and a smaller lower part, and its height is more than twice the height of the outer platform stage 141, and the upper opening of the outer conical section 142 and the outer platform The lower openings of the stages 141 are of equal size; the outer outlet section 143 is a cone that is larger at the top and smaller at the bottom, and its height is smaller than the height of the outer stage 141, and the upper opening of the outer outlet section 143 and the lower opening of the outer cone section 142 are of equal size; the transition section 144 is a rectangle, and the upper opening of the transition section 144 and the lower opening of the outer outlet section 143 are of equal size; the diffusion section 145 is a cone that is smaller at the top and larger at the bottom, and the upper opening of the diffusion section 145 and the lower opening of the transition section 144 are of equal size, and the lower opening of the diffusion section 145 is smaller than the upper opening of the outer stage 141 and larger than the lower opening of the outer stage 141.

[0046] The knife shell 14 is elastically connected with a knife core 15 at the top and bottom. The knife shell 14 and the knife core 15 are two relatively independent parts, which are detachably connected. When installed, the knife core 15 is arranged in the knife shell 14, and the knife core 15 can move up and down relative to the knife shell 14. The outer wall of the knife core 15 includes an inner platform stage 151, an inner conical section 152 and an inner outlet section 153 arranged from top to bottom. The inner platform stage 151, the inner conical section 152 and the inner outlet section 153 are semicircular in different sizes. The inner platform stage 151 is a step with an L-shaped side wall; the inner conical section 152 is a cone with a small top and a large bottom, and its height is less than the height of the outer conical section 142. The outer diameter of the upper end of the inner conical section 152 is equal to the outer diameter of the lower end of the inner platform stage 151, and the outer diameter of the lower end of the inner conical section 152 is less than that of the outer conical section 14 2, and is larger than the lower opening size of the outer outlet section 143; the inner outlet section 153 is a cone with a larger upper portion and a smaller lower portion, the upper outer diameter of the inner outlet section 153 is equal to the lower outer diameter of the inner conical section 152, the lower end of the inner outlet section 153 is inclined toward the center of the knife core 15, and intersects with the side wall of the threading hole 13, the inner wall of the knife core 15 is a semicircular shape of the same size, the inner wall is the side wall of the threading hole 13, the diameter of the threading hole 13 is the same as the diameter of the transition section 144 below, and the upper opening of the threading hole 13 is an inclined surface inclined outward.

[0047] The blade housing 14 and the blade core 15 are surrounded to form an air cavity 16. Specifically, there is a gap between the inner conical section 152 and the outer conical section 142 to form the air cavity 16. The air cavity 16 is a conical cavity that is larger at the top and smaller at the bottom. The lower end of the air cavity 16 is a semi-circular air outlet 17. Specifically, there is a gap between the inner outlet section 153 and the outer outlet section 143 to form the air outlet 17. The air outlet 17 is arranged downwardly and is connected to the threading hole 13. Since the blade core 15 and the blade housing 14 are elastically connected, the distance between the upper and lower ends of the air outlet 17 is adjustable, that is, the gap of the air outlet 17 is adjustable up and down. Fig. 9 and Fig.10 shown.

[0048] When the blade core 15 is installed, the inner stage 151 and the outer stage 141 fit together, the inner stage 151 rests on the outer stage 141, and the outer wall of the inner stage 151 and the inner wall of the outer stage 141 fit tightly to prevent air leakage. At the same time, a height bolt 18 is provided between the blade core 15 and the blade housing 14, and there are at least two height bolts 18 on the front blade body 41 and the rear blade body 42. The height bolt 18 vertically passes through the inner stage 151 of the blade core 15 and is threadedly connected with the outer conical section 142 of the blade housing 14, that is, at least two threaded holes 19 are provided on the outer conical section 142 of the blade housing 14, and the height bolt 18 passes through the blade core 15 and is connected with the threaded hole 19.

[0049] A compression spring 20 is also sleeved on the height bolt 18. The compression spring 20 is hidden in the inner stage 151, that is, at least two stepped holes 21 are opened on the knife core 15. The stepped holes 21 penetrate the inner stage 151. The height bolt 18 passes through the stepped holes 21 to connect the threaded holes 19. The compression spring 20 is arranged in the large diameter section of the stepped holes 21. The compression spring 20 is tightly pressed between the inner stage 151 of the knife core 15 and the outer stage 141 of the knife housing 14. After the height bolt 18 is tightened, the inner stage 151 is tightly pressed against the outer stage 141, and the top surface of the knife core 15 is flush with the top surface of the knife housing 14. At this time, the knife core 15 can no longer move downward, the compression spring 20 is compressed, and the gap of the air outlet 17 is the smallest. After the height bolt 18 is loosened, the compression spring 20 tends to stretch. Under the lifting of the compression spring 20, the knife core 15 moves upward and the gap of the air outlet 17 increases.

[0050] In order to accurately adjust the size of the air outlet 17, a scale is provided on the outer wall of the inner stage 151 of the blade core 15. The scale consists of multiple scale lines arranged at intervals from top to bottom. The scale lines are arranged in an arc shape along the outer wall of the inner stage 151. The scale is not shown in the figure. When the air outlet 17 is the smallest, the scale is blocked by the outer stage 141 and cannot be observed. When the air outlet 17 is enlarged, the inner core moves up and the scale lines are gradually exposed. The size of the gap of the air outlet 17 can be judged according to the number of exposed scale lines.

[0051] The front blade body 41 and the rear blade body 42 need to be used in combination, and the air cavity 16 between the front blade body 41 and the rear blade body 42 is connected. At this time, the air cavity 16 is a circular ring cavity. The transition section 144 between the front blade body 41 and the rear blade body 42 is connected to form a transition hole, and the diffusion section 145 between the front blade body 41 and the rear blade body 42 is connected to form a diffusion hole 29. At the same time, the blade core 15 of the front blade body 41 and the rear blade body 42 are surrounded to form a cylindrical threading hole 13, and the threading hole 13 is connected with the diffusion hole 29 through the transition hole below, and the diffusion hole 29 is a conical hole. In order to achieve accurate pairing of the front blade body 41 and the rear blade body 42, positioning holes 22 are opened on both sides of the bottom of the blade shell 14 of the front blade body 41 and on both sides of the top of the blade core 15. At the same time, positioning columns are provided on both sides of the bottom of the blade shell 14 of the rear blade body 42 and on both sides of the top of the blade core 15. The positioning columns are inserted into the positioning holes 22, thereby achieving accurate pairing between the two blade shells 14 and the two blade cores 15, and ensuring the sealing of the combination of the front blade body 41 and the rear blade body 42.

[0052] In order to supply air to the air knife unit 4, a vent pipe 23 is threadedly connected to one side of the air box 301. The vent pipe 23 is a hollow external threaded pipe. The vent pipe 23 is arranged perpendicular to the air pipe 1 and arranged between the two support plates 302. When the vent pipe 23 is installed, one end of the vent pipe 23 extends into the air box 301, and the other end extends outward through the base 2. Specifically, one end of the vent pipe 23 passes through the rear extension section and is threadedly connected to the air box 301. At the same time, a long hole 24 for the vent pipe 23 to pass through is opened on the rear extension section. The long hole 24 is to ensure that the vent pipe 23 can move left and right with the air box 301.

[0053] The other end of the vent pipe 23 penetrates the front blade body 41 and communicates with the air cavity 16. Specifically, a stepped through hole 25 is provided in the middle of the blade housing 14 of the front blade body 41. The vent pipe 23 communicates with the air cavity 16 through the stepped through hole 25, and the end of the vent pipe 23 abuts against the shaft shoulder position in the stepped through hole 25. Since the vent pipe 23 is threadedly connected, the length of the vent pipe 23 outside the air box 301 is adjustable, thereby changing the front and rear position of the air knife unit 4 on the support plate 302.

[0054] When the air knife unit 4 is installed with the support plate 302, firstly, support blocks 26 are provided on both sides of the outside of the knife housing 14, and the knife housing 14 is supported on the support plate 302 through the support blocks 26, and the two support plates 302 clamp the knife housing 14. Then, locking bolts 27 are provided at the ends of the support plates 302. Specifically, each end of the support plate 302 is bent inwardly and connected with a locking bolt 27. The rear side of the knife housing 14 of the rear knife body 42 is also provided with a locking hole 28, and the locking bolt 27 is supported in the locking hole 28. In this way, tightening the locking bolt 27 causes the air knife unit 4 to move forward. Since the front of the air knife unit 4 is restricted by the vent pipe 23, the locking bolt 27 cooperates with the vent pipe 23 to clamp the air knife unit 4 front and back, and can form a three-point clamping for the air knife unit 4 to fix it.

[0055] When the present invention is used: first, the base frame 3 is installed in the base 2 to ensure that the air pipe 1 and the air box 301 are connected, the vent pipe 23 and the air box 301 are threaded, and then the air pipe 1 is installed on the galvanizing equipment by bolts to ensure that the running path of the steel wire is located between the two support plates 302, and the air joint 5 is connected to the air source. The front blade body 41 is placed between the support plates 302, and then the rear blade body 42 is placed between the support plates 302 to ensure that the steel wire passes between the front blade body 41 and the rear blade body 42. Adjust the two side bolts 10 to drive the air knife unit 4 to move left and right, thereby changing the left and right position of the steel wire in the threading hole 13, and at the same time, turn the vent pipe 23 to drive the air knife unit 4 to move forward and backward, change the front and rear position of the steel wire in the threading hole 13, and ensure that the steel wire is located in the center of the threading hole 13. Finally, tighten the locking bolt 27, and use two locking bolts 27 and a vent pipe 23 to ensure the fixation of the position of the air knife unit 4.

[0056] After the gas source is supplied, the nitrogen enters the air pipe 1 through the gas joint 5 and the adjusting bolt 6. The nitrogen intake amount can be changed by adjusting the bolt 6. The nitrogen flows downward in the air pipe 1, enters the air box 301, and enters the air cavity 16 in the air knife unit 4 through the vent pipe 23. The nitrogen quickly fills the air cavity 16 and flows downward in the air cavity 16. As the cross section of the air cavity 16 decreases, the nitrogen pressure gradually increases and finally passes through the air outlet 17 and is uniformly ejected at high speed in a ring shape, forming a uniform blowing in the circumferential direction of the steel wire, thereby uniformly wiping the zinc liquid on the surface of the steel wire.

[0057] In order to ensure that the high-speed airflow can be quickly discharged after wiping the surface of the steel wire and avoid the airflow from forming turbulence in the threading hole 13, a diffusion hole 29 is opened at the bottom of the threading hole 13. The diffusion hole 29 is a conical hole. The air outlet 17 is inclined toward the diffusion hole 29, and the extension line of the airflow ejected through the air outlet 17 does not intersect with the side wall of the threading hole 13. The ejected airflow can smoothly enter the diffusion hole 29 and then flow out of the threading hole 13, avoiding the airflow in the threading hole 13. Turbulence is guaranteed to ensure the quality of wiping.

[0058] The requirements for galvanizing steel wires of different specifications can be met by adjusting the gap of the air outlet 17. On the basis of fixing the blade housing 14, the height bolt 18 can be loosened, and the blade core 15 is raised under the extension of the compression spring 20, thereby increasing the gap of the air outlet 17, so that the thickness of the galvanized layer can be changed, and the performance of the steel wire can be changed.

[0059] After the pressure air knife is used for a certain period of time, when the position of the air knife unit 4 needs to be adjusted, the side bolt 10 can be operated first to change the left and right position of the threading hole 13, and then the vent pipe 23 can be operated to change the front and rear position of the threading hole 13 to ensure that the steel wire is located at the center of the threading hole 13. When the air knife unit 4 needs to be cleaned, the locking bolt 27 can be loosened to remove the rear blade body 42 and the front blade body 41 from the support plate 302, and the air outlet 17 and the inner wall of the threading hole 13 can be cleaned to avoid zinc slag clogging. At the same time, the height bolt 18 can be screwed out to separate the blade core 15 and the blade housing 14, so as to clean the air cavity 16, improve the comprehensiveness of the cleaning, and ensure smooth airflow.

[0060] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A nitrogen wiping pressure air knife for controlling galvanizing of steel wire, characterized in that: The invention comprises an air pipe (1), a base (2), a bottom frame (3) and an air knife unit (4), wherein the upper end of the air pipe (1) is connected to an air source, the base (2) is arranged at the lower end of the air pipe (1), the bottom frame (3) is arranged inside the base (2) so as to be adjustable left and right, the bottom frame (3) comprises an air box (301) and support plates (302) arranged on both sides of the air box (301), the support plates (302) extend horizontally out of the base (2), the air box (301) is placed inside the base (2) and slides left and right, and the air box (301) is connected to the air pipe (1) upwards; A vent pipe (23) is threadedly connected to one side of the air box (301), and the other end of the vent pipe (23) passes through the base (2) and extends outward, and the vent pipe (23) is arranged between the two support plates (302); the air knife unit (4) is adjustable forward and backward between the two support plates (302), and a locking bolt (27) is provided at the end of the support plate (302), and the locking bolt (27) cooperates with the vent pipe (23) to clamp the air knife unit (4) forward and backward; The air knife unit (4) comprises a front knife body (41) and a rear knife body (42) of the same structure, the front knife body (41) comprises a knife shell (14) and a knife core (15), the knife shell (14) is elastically connected to the knife core (15) at the top and bottom, the knife shell (14) and the knife core (15) together form an air cavity (16), the air cavity (16) is a conical cavity with a larger top and a smaller bottom, the lower end of the air cavity (16) is a semi-annular air outlet (17), the air outlet (17) is arranged obliquely downward, and the distance between the upper and lower ends of the air outlet (17) is adjustable; The front blade body (41) and the rear blade body (42) are connected and assembled, and the cross-section is round inside and square outside; the air cavity (16) between the front blade body (41) and the rear blade body (42) is connected; the blade cores (15) of the front blade body (41) and the rear blade body (42) are combined to form a cylindrical threading hole (13); the air outlet (17) is connected to the threading hole (13); and the other end of the ventilation pipe (23) penetrates into the front blade body (41) and is connected to the air cavity (16).

2. A nitrogen wiping pressure air knife according to claim 1, characterized in that: The air pipe (1) is a columnar tube body. The upper end of the air pipe (1) is connected to a gas joint (5). The gas joint (5) is arranged perpendicular to the air pipe (1). The gas joint (5) passes through the air pipe (1). The air pipe (1) separates the gas joint (5) into a front tube body (51) and a rear tube body (52). The rear tube body (52), the air pipe (1) and the front tube body (51) are connected in sequence. The front tube body (51) is connected to a gas source.

3. A nitrogen wiping pressure air knife according to claim 2, characterized in that: The air joint (5) is internally threadedly connected with an adjusting bolt (6), the adjusting bolt (6) passes through the air pipe (1) from the rear tube body (52) and extends into the front tube body (51), the end of the adjusting bolt (6) extending into the air joint (5) is hollow in structure, a plurality of air holes (7) are evenly arranged in a circumferential direction on the side wall of the adjusting bolt (6), and the front tube body (51) is connected to the air pipe (1) through the air holes (7).

4. A nitrogen wiping pressure air knife according to claim 1, characterized in that: The base (2) comprises a bottom cover (201) and a bottom plate (202); the bottom cover (201) is a rectangular cover body; the cross section of the bottom cover (201) is larger than the air pipe (1); an air intake ring (8) is arranged on the top of the bottom cover (201); the air intake ring (8) passes through the bottom cover (201) and is connected to the air pipe (1); the middle of the front and rear sides of the bottom cover (201) extend vertically downward to form front and rear extension sections; the bottom of the front and rear extension sections is bolted to the bottom plate (202).

5. A nitrogen wiping pressure air knife according to claim 4, characterized in that: The air box (301) is a rectangular box body. The air box (301) is placed between the bottom cover (201) and the bottom plate (202). The cross section of the air box (301) is smaller than that of the bottom cover (201). The upper surface of the air box (301) is tightly against the inner top surface of the bottom cover (201). The lower surface of the air box (301) is tightly against the bottom plate (202). The length of the air box (301) in the left-right direction is greater than the length of the front-rear extension section in the left-right direction. The lower parts of the left and right sides of the air box (301) extend out of the bottom cover (201) and are connected to one end of the support plate (302). The left and right sides of the bottom cover (201) are provided with side bolts (10) for moving the air box (301). The bottom plate (202) is provided with bottom bolts (12) for supporting the air box (301).

6. A nitrogen wiping pressure air knife according to claim 4, characterized in that: An air receiving port (9) is provided above the air box (301), and an air intake ring (8) passes downward through the air receiving port (9) to communicate with the air box (301); the cross section of the air receiving port (9) is larger than that of the air intake ring (8), and the air intake ring (8) slides left and right in the air receiving port (9); The ventilation pipe (23) is a hollow externally threaded pipe. The ventilation pipe (23) is arranged perpendicular to the air pipe (1). One end of the ventilation pipe (23) passes through the rear extension section and is threadedly connected to the air box (301). The rear extension section is also provided with a long hole (24) for the ventilation pipe (23) to pass through.

7. The nitrogen wiping pressure air knife according to claim 1, characterized in that: Support blocks (26) are arranged on both sides of the outside of the knife housing (14), and the knife housing (14) is supported on the support plates (302) through the support blocks (26). The two support plates (302) clamp the knife housing (14). The inside of the knife housing (14) is a hollow cavity, and the longitudinal cross-section of the hollow cavity decreases from top to bottom and then expands. The inner wall of the knife housing (14) includes an outer platform stage (141), an outer conical section (142), an outer outlet section (143), a transition section (144) and a diffusion section (145) which are arranged in sequence from top to bottom.

8. A nitrogen wiping pressure air knife according to claim 7, characterized in that: The knife core (15) is arranged in the knife housing (14); the outer wall of the knife core (15) comprises an inner platform stage (151), an inner conical section (152) and an inner outlet section (153) arranged in sequence from top to bottom; the inner platform stage (151) and the outer platform stage (141) fit together; the inner platform stage (151) abuts against the outer platform stage (141); a gap exists between the inner conical section (152) and the outer conical section (142) to form the air cavity (16); and a gap exists between the inner outlet section (153) and the outer outlet section (143) to form the air outlet (17).

9. A nitrogen wiping pressure air knife according to claim 8, characterized in that: A height bolt (18) is arranged between the blade core (15) and the blade housing (14); the front blade body (41) and the rear blade body (42) each have at least two height bolts (18); the height bolts (18) vertically penetrate the inner platform stage (151) of the blade core (15) and the outer conical section (142) of the blade housing (14) to be threadedly connected; a compression spring (20) is also sleeved on the height bolt (18); the compression spring (20) is hidden and arranged in the inner platform stage (151); the compression spring (20) is tightly pressed between the inner platform stage (151) of the blade core (15) and the outer platform stage (141) of the blade housing (14).

10. The nitrogen wiping pressure air knife according to claim 1, characterized in that: A stepped through hole (25) is provided in the middle of the blade housing (14) of the front blade body (41); the vent pipe (23) is connected to the air cavity (16) through the stepped through hole (25); and the end of the vent pipe (23) is against the stepped through hole (25); Two locking holes (28) are also provided on the rear side of the blade housing (14) of the rear blade body (42); the end of each support plate (302) is bent inwardly and connected to a locking bolt (27); the locking bolt (27) abuts against the locking hole (28).

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