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 an air 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 is convenient to maintain and clean, the position of the air knife unit can be adjusted, and it is guaranteed that a steel wire is located in the center of a threading hole all the time.

Description

Technical Field

[0001] This utility model relates to the field of galvanizing air knife technology, and in particular to a nitrogen wiping pressure air knife. Background Technology

[0002] Galvanizing steel wire is done to reduce corrosion losses, and hot-dip galvanizing is one method of this process. Specifically, in continuous production, steel wire is immersed in molten zinc at several hundred degrees Celsius in a zinc pot, causing a zinc layer to adhere to the surface of the wire. After exiting the zinc pot, the wire is immediately wiped with nitrogen gas to control the zinc layer thickness. This means that at the point where the wire exits the zinc pot, the molten zinc on the surface of the wire is wiped with nitrogen gas.

[0003] The final actuator in nitrogen blowing zinc is the air knife. The steel wire passes vertically upward through the air knife, and nitrogen gas at a certain pressure is introduced into the air knife to generate a ring-shaped jet of air. This jet of air can evenly blow away excess zinc liquid from the surface of the steel wire. The zinc liquid then returns to the zinc pot in the reverse direction, 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 in application: 1. When the airflow sprays molten zinc, a small amount of splashed zinc dross is generated. The zinc dross 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 uniform annular airflow, affecting the uniformity of the zinc layer thickness and surface quality, but also hinders the airflow in the internal cavity of the air knife, affecting the normal application of the air knife. For example, a detachable steel wire cleaning device disclosed in patent publication number CN206244863U has a detachable structure for the cleaning seat and cleaning core, forming an annular air cavity between the cleaning seat and the cleaning core. This air cavity can be opened, thereby cleaning the adhered molten zinc and replacing parts. However, the cleaning seat and cleaning core are fixed structures, making it difficult to easily thread the steel wire through them.

[0005] 2. When the steel wire passes through the air knife, it must be ensured that the wire is centered at the air outlet of the air knife. This ensures that the molten zinc is evenly sprayed onto the surface of the wire. However, since the air knife is installed on the galvanizing equipment, the vibrations from the equipment's operation will be transmitted to the air knife, causing it to shift. This results in the steel wire moving relative to the air knife, making it difficult to ensure that the wire remains centered. Furthermore, after a certain number of cycles of operation of the galvanizing equipment, it is necessary to adjust the position of the steel wire in the air knife to ensure that the wire is centered. Summary of the Invention

[0006] To address the problems of conventional air knife structures being relatively fixed, which makes it difficult to flexibly adjust the air knife's posture and clean its interior, this invention provides a nitrogen-blown pressure air knife. The air knife structure is optimized into a split design, which facilitates cleaning of the air knife's interior. At the same time, with a fixed 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 of the air knife and guaranteeing the uniformity of the blowing and wiping of the steel wire.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A nitrogen-powered pressure air knife for controlling the galvanizing of steel wire includes an air tube, a base, a frame, and an air knife unit. The upper end of the air tube is connected to an air source to supply nitrogen. The lower end of the air tube is equipped with the base, which is adjustable left and right within the base to facilitate left and right movement and fixation. The frame includes an air box and support plates on both sides of the air box. The support plates extend horizontally outward from the base. The air box slides left and right within the base to facilitate movement of the support plates. The air box is connected upward to the air tube to facilitate the delivery of nitrogen to the air box.

[0009] A vent pipe is threaded onto one side of the gas box. One end of the vent pipe extends into the gas box, and the other end passes through the base and extends outward. Nitrogen gas is introduced into the vent pipe, which is arranged between two support plates. The air knife unit is adjustable between the two support plates to facilitate its forward and backward movement. Locking bolts are provided at the ends of the support plates. The locking bolts work with the vent pipe to clamp the air knife unit from the front and back, making it easy to fix the air knife unit.

[0010] The air knife unit includes a front knife body and a rear knife body with the same structure. The front knife body includes a knife shell and a knife core. The knife core is elastically connected to the upper and lower parts of the knife shell. The knife shell and the knife core together form an air cavity. The air cavity is a conical cavity that is larger at the top and smaller at the bottom, which increases the airflow pressure. The lower end of the air cavity is a semi-circular air outlet. The air outlet is arranged at an angle downward, which improves the ability of the airflow to blow and spread zinc liquid. The distance between the upper and lower ends of the air outlet is adjustable, which makes it convenient to control the zinc layer thickness on the surface of the steel wire.

[0011] The front and rear cutter bodies are connected and combined to form a cross-section with an inner circle and an outer square. The air chamber between the front and rear cutter bodies is connected. The cutter cores of the front and rear cutter bodies surround each other to form a cylindrical threading hole. The air outlet is connected to the threading hole. The other end of the air pipe is inserted into the front cutter body and connected to the air chamber, which facilitates the supply of nitrogen to the air chamber and the nitrogen is sprayed from the air outlet.

[0012] Furthermore, the trachea is a cylindrical tube with an air connector at the upper end for easy connection to an air source. The air connector is arranged perpendicular to the trachea and passes through the trachea. The trachea divides the air connector into a front tube and a rear tube. The rear tube, the trachea, and the front tube are connected in sequence, and the front tube is connected to the air source.

[0013] Furthermore, the gas connector is internally threaded with an adjusting bolt. The adjusting bolt passes through the gas pipe from the rear tube body and extends into the front tube body. The end of the adjusting bolt that extends into the gas connector has a hollow structure, and multiple air holes are evenly distributed around the side wall of the adjusting bolt. The front tube body communicates with the gas pipe through these air holes. By turning the adjusting bolt, the opening of the air holes is changed, thereby facilitating the control of the nitrogen intake volume.

[0014] Furthermore, the base includes a bottom cover and a bottom plate. The bottom cover is a rectangular cover with a cross-section larger than the air pipe. An air intake ring is provided on the top of the bottom cover, and the air intake ring passes through the bottom cover and communicates with the air pipe. The bottom cover extends vertically downward from the middle of the front and rear sides to form front and rear extension sections, and the bottom plate is bolted between the bottom of the front and rear extension sections.

[0015] Furthermore, the gas box is a rectangular box, which is placed between the bottom cover and the bottom plate to facilitate vertical restriction of the gas box. The cross-section of the gas box is smaller than that of the bottom cover, which facilitates the left and right movement of the gas box within the bottom cover. The upper surface of the gas box is tightly against the inner top surface of the bottom cover, and the lower surface of the gas box is tightly against the bottom plate. Side bolts for moving the gas box are provided on the left and right sides of the bottom cover to facilitate driving the gas box to move left and right. Bottom bolts for supporting the gas box are provided on the bottom plate to facilitate lifting the gas box upwards.

[0016] Furthermore, an air receiving port is provided above the air box, and an 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 within the air receiving port.

[0017] The vent pipe is a hollow externally threaded pipe, arranged perpendicular to the air pipe. One end of the vent pipe passes through the rear extension section and is threadedly connected to the air box. The rear extension section also has a long hole for the vent pipe to pass through, to prevent interference with the movement of the vent pipe.

[0018] Furthermore, the blade shell is provided with support blocks on both sides of its exterior. The blade shell rests against the support plates through the support blocks, which facilitates the support of the front and rear blade bodies on the support plates. The two support plates clamp the blade shell. The interior of the blade shell is a hollow cavity. The longitudinal section of the hollow cavity decreases from top to bottom and then expands. The inner wall of the blade shell 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.

[0019] Furthermore, the blade core is arranged inside the blade housing. The outer wall of the blade core includes an inner platform stage, an inner conical section, and an inner outlet section arranged sequentially from top to bottom. The inner platform stage and the outer platform stage fit together, with the inner platform stage abutting against the outer platform stage. A gap exists between the inner conical section and the outer conical section to form the air cavity, and a gap exists between the inner outlet section and the outer outlet section to form the air outlet.

[0020] Furthermore, a height bolt is provided between the blade core and the blade shell. There are at least two height bolts on both the front and rear blade bodies. The height bolts vertically pass through the inner platform stage of the blade core and are threadedly connected to the outer tapered section of the blade shell. A compression spring is also fitted onto the height bolt, concealed within the inner platform stage, and pressed tightly against the space between the inner platform stage of the blade core and the outer platform stage of the blade shell. Adjusting the height bolts allows for easy modification of the air outlet gap.

[0021] Furthermore, a stepped through hole is provided in the middle of the blade shell of the front blade body, and the air pipe communicates with the air chamber through the stepped through hole. The end of the air pipe abuts against the stepped through hole, and the air pipe does not extend into the air chamber.

[0022] The rear side of the blade housing of the rear blade body is also provided with a locking hole. Each end of the support plate is bent inward and connected with a locking bolt. The locking bolt abuts in the locking hole to facilitate the fixation of the air knife unit.

[0023] The beneficial effects of this utility model through the above technical solution are:

[0024] This utility model features a reasonable structural design. The entire pressure air knife is installed on the galvanizing equipment via an air pipe and connected to an air source through an air connector to supply nitrogen at a certain pressure. An adjusting bolt is installed inside the air connector, allowing for convenient control of the nitrogen intake by turning the bolt. The air pipe, air box, air inlet pipe, and air knife unit are sequentially connected, enabling the supply of air to the air knife unit.

[0025] This invention features a base at the bottom of the air tube. The base is a split structure, facilitating the installation of the base frame inside. The air box within the base frame can move left and right within the base. The movement and fixation of the air box are controlled by side bolts. When the air box moves, the support plate can move left and right together. The support plate has an air knife unit, which facilitates the movement of the air knife unit.

[0026] The air box of this invention is connected to the air knife unit via an air pipe. The air pipe and the air box are threaded together, allowing the air knife unit to be adjusted in the front-to-back position on the support plate. Combined with the air box, the air knife unit can be adjusted left-to-right, thus ensuring the steel wire is centered within the air knife unit and guaranteeing uniform nitrogen purging. The air knife unit, supported by the support plate, also employs a three-point fixing structure. The air pipe restricts the air knife unit, while two locking bolts are tightly pressed against it, clamping the air knife unit and ensuring reliable fixation on the support plate.

[0027] This utility model's air knife unit has a split structure, including a front blade body and a rear blade body. Each blade body includes a blade shell and a blade core. The blade core is elastically mounted on the blade shell, thus the air outlet gap of the entire air knife unit is adjustable, enabling control over the zinc layer thickness. The entire air knife unit consists of four components: two blade shells and two blade cores. Both the blade shells and blade cores are detachable and washable, facilitating thorough cleaning of the inner and outer walls of the air knife unit, preventing zinc slag from clogging the air outlets, and ensuring the quality of nitrogen wiping. Attached Figure Description

[0028] Figure 1 This is a front view of the nitrogen wiping pressure air knife of this utility model. The arrow in the figure points to the steel wire of the zinc pot, which runs vertically upward through the center of the air knife unit.

[0029] Figure 2 This utility model relates to a nitrogen-based pressure air knife for wiping. Figure 1 A cross-sectional view of the AA-direction adjusting bolt, with the arrows in the figure pointing in the direction of airflow.

[0030] Figure 3 This utility model relates to a nitrogen-based pressure air knife for wiping. Figure 1 Top view of the air knife unit in the middle BB direction.

[0031] Figure 4 This is an isometric view of the air knife unit of the nitrogen wiping pressure air knife of this utility model.

[0032] Figure 5 This utility model relates to a nitrogen-based pressure air knife for wiping. Figure 4 A sectional view.

[0033] Figure 6 This is a cross-sectional view of the base and frame of the nitrogen wiping pressure air knife of this utility model.

[0034] Figure 7 This is a schematic diagram showing the disassembled base and frame of the nitrogen wiping pressure air knife of this utility model.

[0035] Figure 8 This is a schematic diagram showing the disassembled front and rear blades and base frame of the nitrogen wiping pressure air knife of this utility model.

[0036] Figure 9 This is a schematic diagram of the installation of the blade core and blade shell of the nitrogen wiping pressure air knife of this utility model. The direction of the arrow in the figure indicates the direction of the airflow ejected through the air outlet.

[0037] Figure 10 This is a schematic diagram showing the disassembled blade core and blade shell of the nitrogen wiping pressure air knife of this utility model.

[0038] The attached diagram is labeled as follows: 1. Air tube; 2. Base; 201. Bottom cover; 202. Base plate; 3. Base frame; 301. Air box; 302. Support plate; 4. Air knife unit; 41. Front knife body; 42. Rear knife body; 5. Air connector; 51. Front tube body; 52. Rear tube body; 6. Adjusting bolt; 7. Air hole; 8. Air inlet ring; 9. Air receiving port; 10. Side bolt; 11. Sealing ring; 12. Bottom bolt; 13. Wiring hole; 14. Knife housing; 141. External stage; 142. 143 Outer outlet section, 144 Transition section, 145 Diffusion section, 15 Knife core, 151 Inner platform stage, 152 Inner conical section, 153 Inner outlet section, 16 Air chamber, 17 Air outlet, 18 Height bolt, 19 Threaded hole, 20 Compression spring, 21 Stepped hole, 22 Positioning hole, 23 Vent pipe, 24 Long hole, 25 Stepped through hole, 26 Support block, 27 Locking bolt, 28 Locking hole, 29 Diffusion hole. Detailed Implementation

[0039] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings:

[0040] like Figures 1-10 As shown, a nitrogen-based pressure air knife is used for controlling the galvanization of steel wire, primarily controlling the thickness of the galvanized layer on the steel wire surface. The pressure air knife includes an air tube 1, a base 2, a frame 3, and an air knife unit 4. The air tube 1 is a quadrangular prism-shaped tube, closed at the top and open at the bottom. The upper end of the air tube 1 is connected to the galvanizing equipment via bolts, achieving the installation and fixation of the air tube 1. The installation structure of the air tube 1 is not shown in the figure.

[0041] The upper end of the trachea 1 is also connected to a gas source, which is a nitrogen pipeline at a certain pressure. The trachea 1 is connected to this nitrogen pipeline, thus supplying nitrogen to the trachea 1. Specifically, the upper end of the trachea 1 is connected to a gas connector 5, which is arranged perpendicular to the trachea 1. The trachea 1 is connected to the gas source through the gas connector 5, and nitrogen enters the trachea 1 through the gas connector 5. Figure 1 As shown.

[0042] To regulate the nitrogen intake, the gas connector 5 is an internally threaded tube that passes through the gas pipe 1. The gas pipe 1 divides the gas connector 5 into a front tube 51 and a rear tube 52, with the rear tube 52 being shorter than the front tube 51. The rear tube 52, the gas pipe 1, and the front tube 51 are connected sequentially, with the front tube 51 connected to the gas source. Simultaneously, an adjusting bolt 6 is internally threaded onto the gas connector 5. One end of the adjusting bolt 6 extending into the gas connector 5 has a hollow interior. Multiple evenly spaced, waist-shaped air holes 7 are evenly distributed on the side wall of the adjusting bolt 6, and these air holes 7 are connected to the hollow interior of the adjusting bolt 6.

[0043] During installation, 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 hole 7. Thus, nitrogen gas first enters the front tube body 51, then enters the adjusting bolt 6, and then passes through the air hole 7 before connecting with the air pipe 1. By turning adjusting bolt 6, the length of the air hole 7 within the air pipe 1 can be adjusted, thereby adjusting the opening of the air hole 7 to control the nitrogen gas intake. Figure 2 As shown.

[0044] A base 2 is installed at the lower end of the trachea 1, and the base 2 is fixedly connected to the trachea 1. The base 2 includes a bottom cover 201 and a base plate 202. The bottom cover 201 is a rectangular cover with a cross-section larger than that of the trachea 1. The cross-section of the bottom cover 201 is an inverted "U" shape, with the upper end closed and the lower end open. During installation, the upper end of the bottom cover 201 is connected and fixed to the trachea 1, thereby sealing the lower end of the trachea 1. An air inlet ring 8 is installed at the top of the bottom cover 201, which penetrates the bottom cover 201 and connects to the trachea 1, allowing nitrogen gas inside the trachea 1 to be drawn out through the air inlet ring 8. Figure 3 As shown.

[0045] During installation, the base plate 202 extends vertically downwards from the center of both the front and rear sides of the base cover 201 to form front and rear extension sections, such as... Figure 7 As shown, the front and rear side walls of the bottom cover 201 are connected to the corresponding front and rear extension sections below to form a "T"-shaped structure. The bottom of the front and rear extension sections is bolted to the bottom of the bottom plate 202. The lengths of the front and rear extension sections and the bottom plate 202 are both less than the length of the bottom cover 201.

[0046] A base frame 3 is adjustable left and right within the base 2, allowing the base frame 3 to move left and right within the base 2. The base frame 3 includes an air box 301 and support plates 302 on both sides of the air box 301. The air box 301 is a closed rectangular box that slides left and right within the base 2. Specifically, the air box 301 is positioned between the bottom cover 201 and the base plate 202. The cross-section of the air box 301 is smaller than that of the bottom cover 201, and 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 direction. The lower parts of the left and right sides of the air box 301 extend out of the bottom cover 201 and connect to one end of the support plate 302, allowing the air box 301 to move left and right within the bottom cover 201.

[0047] The gas box 301 is connected upwards to the gas pipe 1, allowing nitrogen gas to enter the gas box 301 downwards. Specifically, a gas receiving port 9 is provided at the top of the gas box 301, and an inlet ring 8 passes downwards through the gas receiving port 9 and connects to the gas box 301. Since the gas box 301 needs to move left and right, the cross-section of the gas receiving port 9 is larger than that of the inlet ring 8 to ensure that the inlet ring 8 can slide left and right within the gas receiving port 9. The nitrogen gas in the gas pipe 1 flows downwards into the gas box 301 through the inlet ring 8.

[0048] During installation, the gas box 301 is first removed from the base plate 202. The gas box 301 is then placed into the base cover 201 from bottom to top. The base plate 202 is then bolted onto the bottom of the base cover 201. The gas box 301 is positioned within the base 2 using the cooperation between the base plate 202 and the base cover 201. The gas box 301 can move left and right within the base 2. After installation, the upper surface of the gas box 301 is pressed tightly against the inner top surface of the base cover 201, and the lower surface of the gas box 301 is pressed tightly against the base plate 202, preventing the gas box 301 from moving vertically; it can only move left and right.

[0049] In order to enable the gas box 301 to move left and right, the bottom cover 201 is provided with side bolts 10 on the left and right sides for moving the gas box 301. By turning one side bolt 10, the gas box 301 can be pushed to the other side. After both side bolts 10 are tightened at the same time, the gas box 301 can be clamped and fixed, thus fixing the position of the gas box 301.

[0050] To ensure airtightness of the gas box 301, a sealing ring 11 is installed on the top surface of the gas box 301, surrounding the air inlet 9. Simultaneously, a bottom bolt 12 is provided on the base plate 202 to support the gas box 301. Tightening the bottom bolt 12 lifts the gas box 301 upwards, causing the sealing ring 11 to press against the inner surface of the bottom cover 201, ensuring a reliable seal. Figure 6 As shown.

[0051] The support plates 302 on both sides of the gas box 301 extend horizontally outward to form the base 2. A certain distance is maintained between the two support plates 302. When the gas box 301 moves, it causes the support plates 302 to move left and right together. An air knife unit 4 is adjustable between the two support plates 302, and the air knife unit 4 can move back and forth on the support plates 302. The air knife unit 4 is the final actuator of the entire pressure air knife system. Nitrogen gas is ultimately introduced into the air knife unit 4; therefore, the gas box 301 and the air knife unit 4 are connected. Figure 5 As shown.

[0052] The air knife unit 4 is a cylindrical body with an inner circle and an outer square shape. A wire-passing hole 13 is located at the center of the air knife unit 4. The galvanized steel wire passes through this hole 13, and the air knife unit 4 sprays high-pressure nitrogen gas to evenly wipe the steel wire. The air knife unit 4 has a symmetrically arranged two-part structure, comprising a front blade 41 and a rear blade 42 with identical structures. When the front blade 41 and rear blade 42 are connected and combined, their cross-section is an inner circle and an outer square shape. Figure 4 and Figure 8 As shown.

[0053] In this embodiment, the front blade body 41 includes a blade shell 14 and a blade core 15. The blade shell 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 shell 14 is rectangular and the inner wall is semi-circular. Since the blade shell 14 has a certain height, the semi-circular size of the inner wall of the blade shell 14 is different from top to bottom. The inner wall of the blade casing 14 includes, from top to bottom, an outer platform stage 141, an outer conical section 142, an outer exit section 143, a transition section 144, and a diffuser section 145. The outer wall of the blade casing 14 is uniform and rectangular. The outer platform stage 141, outer conical section 142, outer exit section 143, transition section 144, and diffuser section 145 are semicircles of different sizes. The outer platform stage 141 has an L-shaped stepped sidewall. The outer conical section 142 is a cone that is larger at the top and smaller at the bottom, and its height is more than twice the height of the outer platform stage 141. The upper opening of the outer conical section 142 and the outer platform... The lower opening dimensions of stage 141 are equal; the outer exit section 143 is a cone shape with a larger upper opening and a smaller lower opening, and its height is less than that of the outer platform stage 141. The upper opening dimensions of the outer exit section 143 and the lower opening dimensions of the outer cone section 142 are equal; the transition section 144 is rectangular, and the upper opening dimensions of the transition section 144 and the lower opening dimensions of the outer exit section 143 are equal; the diffusion section 145 is a cone shape with a smaller upper opening and a larger lower opening, and the upper opening dimensions of the diffusion section 145 and the lower opening dimensions of the transition section 144 are equal. The lower opening dimension of the diffusion section 145 is less than the upper opening dimension of the outer platform stage 141 and greater than the lower opening dimension of the outer platform stage 141.

[0054] A blade core 15 is elastically connected to the upper and lower parts inside the blade housing 14. The blade housing 14 and the blade core 15 are two relatively independent components, which are detachably connected. During installation, the blade core 15 is arranged inside the blade housing 14, and the blade core 15 can move up and down relative to the blade housing 14. The outer wall of the blade core 15 includes an inner platform stage 151, an inner conical section 152, and an inner exit section 153 arranged sequentially from top to bottom. The inner platform stage 151, the inner conical section 152, and the inner exit section 153 are semicircles of different sizes. The inner platform stage 151 has an L-shaped stepped sidewall. The inner conical section 152 is a cone that is smaller at the top and larger at the bottom, and its height is less than that 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 smaller than that of the outer conical section 142. The lower opening size of section 2 is larger than the lower opening size of the outer exit section 143; the inner exit section 153 is a cone shape with a larger upper end and a smaller lower end. The outer diameter of the upper end of the inner exit section 153 is equal to the outer diameter of the lower end of the inner cone section 152. The lower end of the inner exit section 153 is inclined towards the center of the core 15 and intersects with the side wall of the wire hole 13. The inner wall of the core 15 is a semi-circle of uniform size. This inner wall is the side wall of the wire hole 13. The diameter of the wire hole 13 is the same as the diameter of the transition section 144 below. The upper opening of the wire hole 13 is an outwardly inclined slope.

[0055] The blade shell 14 and the blade core 15 together form an air cavity 16. Specifically, the air cavity 16 is formed by a gap between the inner conical section 152 and the outer conical section 142, and 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-annular air outlet 17. Specifically, the air outlet 17 is formed by a gap between the inner outlet section 153 and the outer outlet section 143. The air outlet 17 is arranged obliquely downwards and connects to the wire hole 13. Because the blade core 15 and the blade shell 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 vertically. Figure 9 and Figure 10 As shown.

[0056] During installation, the inner platform stage 151 and the outer platform stage 141 of the blade core 15 fit together, with the inner platform stage 151 abutting against the outer platform stage 141. The outer wall of the inner platform stage 151 and the inner wall of the outer platform stage 141 are tightly fitted to prevent air leakage. At the same time, a height bolt 18 is provided between the blade core 15 and the blade housing 14. There are at least two height bolts 18 on both the front blade body 41 and the rear blade body 42. The height bolt 18 passes vertically through the inner platform stage 151 of the blade core 15 and is threadedly connected to the outer tapered section 142 of the blade housing 14. That is, the outer tapered section 142 of the blade housing 14 has at least two threaded holes 19. After passing through the blade core 15, the height bolt 18 connects with the threaded holes 19.

[0057] A compression spring 20 is also fitted onto the height bolt 18. The compression spring 20 is hidden inside the inner platform stage 151. That is, the blade core 15 has at least two stepped holes 21. The stepped holes 21 penetrate the inner platform stage 151. The height bolt 18 passes through the stepped holes 21 and connects to the threaded hole 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 platform stage 151 of the blade core 15 and the outer platform stage 141 of the blade shell 14. After the height bolt 18 is tightened, the inner platform stage 151 is tightly pressed against the outer platform stage 141, and the top surface of the blade core 15 is flush with the top surface of the blade shell 14. At this time, the blade core 15 can no longer move downward. The compression spring 20 is compressed, and the gap of the air outlet 17 is minimal. After the height bolt 18 is loosened, the compression spring 20 tends to elongate. Under the lifting of the compression spring 20, the blade core 15 moves upward, and the gap of the air outlet 17 increases.

[0058] To accurately adjust the size of the air outlet 17, a scale is provided on the outer wall of the inner platform stage 151 of the blade core 15. The scale consists of multiple graduation lines arranged at intervals, forming an arc along the outer wall of the inner platform stage 151. The scale is not shown in the figure. When the air outlet 17 is at its smallest, the scale is obstructed by the outer platform stage 141 and cannot be observed. When the air outlet 17 increases in size, the inner core moves upward, and the graduation lines gradually become visible. The size of the gap in the air outlet 17 can be determined by the number of graduation lines that are visible.

[0059] The front cutter body 41 and the rear cutter body 42 need to be used together. The air chamber 16 between the front cutter body 41 and the rear cutter body 42 is connected. At this time, the air chamber 16 is a circular cavity. The transition section 144 between the front cutter body 41 and the rear cutter body 42 is connected to form a transition hole. The diffusion section 145 between the front cutter body 41 and the rear cutter body 42 is connected to form a diffusion hole 29. At the same time, the cutting cores 15 of the front cutter body 41 and the rear cutter body 42 surround each other to form a cylindrical threading hole 13. The threading hole 13 is connected to the lower transition hole and the diffusion hole 29. The diffusion hole 29 is a conical hole. To ensure accurate assembly of the front cutter body 41 and the rear cutter body 42, positioning holes 22 are provided on both sides of the bottom of the cutter shell 14 and both sides of the top of the cutter core 15 of the front cutter body 41. At the same time, positioning pins are provided on both sides of the bottom of the cutter shell 14 and both sides of the top of the cutter core 15 of the rear cutter body 42. The positioning pins are inserted into the positioning holes 22, which ensures accurate assembly between the two cutter shells 14 and the two cutter cores 15, and guarantees the sealing of the assembly of the front cutter body 41 and the rear cutter body 42.

[0060] 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, externally threaded pipe, arranged perpendicular to the air pipe 1, and positioned between the two support plates 302. During installation, one end of the vent pipe 23 extends into the air box 301, while the other end passes through the base 2 and extends outward. Specifically, one end of the vent pipe 23 passes through the rear extension section and is threadedly connected to the air box 301. The rear extension section also has an elongated hole 24 for the vent pipe 23 to pass through, ensuring that the vent pipe 23 can move left and right with the air box 301.

[0061] The other end of the vent pipe 23 passes through the front cutter body 41 and connects to the air chamber 16. Specifically, a stepped through hole 25 is provided in the middle of the cutter shell 14 of the front cutter body 41. The vent pipe 23 connects to the air chamber 16 through the stepped through hole 25, and the end of the vent pipe 23 abuts against the shoulder position inside the stepped through hole 25. Since the vent pipe 23 is threaded, 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.

[0062] When the air knife unit 4 is installed with the support plate 302, support blocks 26 are first provided on both sides of the outer side of the blade housing 14. The blade housing 14 is pressed against the support plate 302 by the support blocks 26, and the two support plates 302 clamp the blade 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 inward and connected to the locking bolt 27. The rear side of the blade housing 14 of the rear blade body 42 is also provided with a locking hole 28, and the locking bolt 27 is pressed into the locking hole 28. Thus, 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 air pipe 23, the locking bolt 27, together with the air pipe 23, can clamp the air knife unit 4 from the front and back, forming a three-point clamping to fix the air knife unit 4.

[0063] In application, the following steps are taken: First, install the base frame 3 inside the base 2, ensuring that the air pipe 1 and the air box 301 are connected. Then, thread the air pipe 23 to the air box 301. Next, install the air pipe 1 onto the galvanizing equipment using bolts, ensuring that the wire's path is between the two support plates 302. Connect the air connector 5 to the air source. Place the front blade 41 between the support plates 302, and then place the rear blade 42 between the support plates 302, ensuring the wire passes between the front and rear blades 41. Adjust the two side bolts 10 to move the air knife unit 4 left and right, thereby changing the wire's position in the threading hole 13. Simultaneously, rotate the air pipe 23 to move the air knife unit 4 back and forth, changing the wire's position in the threading hole 13, ensuring the wire is centered in the threading hole 13. Finally, tighten the locking bolts 27, using the two locking bolts 27 and the air pipe 23 to fix the position of the air knife unit 4.

[0064] After the gas source supplies gas, nitrogen enters the gas pipe 1 through the gas connector 5 and adjusting bolt 6. The nitrogen intake can be changed by adjusting bolt 6. The nitrogen flows downward in the gas pipe 1, enters the gas box 301, passes through the vent pipe 23, and enters the gas chamber 16 in the air knife unit 4. The nitrogen quickly fills the gas chamber 16 and flows downward within it. As the cross-section of the gas chamber 16 decreases, the nitrogen pressure gradually increases and finally exits through the outlet 17 in a uniform, high-speed, annular spray, forming a uniform smear in the circumferential direction of the steel wire, thereby uniformly smearing the zinc liquid on the surface of the steel wire.

[0065] To ensure that the high-speed airflow can be quickly discharged after wiping the surface of the steel wire and to avoid turbulence within the wire hole 13, a diffuser hole 29, which is conical, is provided at the bottom of the wire hole 13. The air outlet 17 is inclined towards the diffuser hole 29, so that the extension line of the airflow ejected from the air outlet 17 does not intersect with the side wall of the wire hole 13. The ejected airflow can smoothly enter the diffuser hole 29 and then flow out of the wire hole 13, avoiding turbulence within the wire hole 13 and ensuring the quality of wiping.

[0066] To meet the galvanizing requirements of different specifications of steel wire, the gap of the air outlet 17 can be adjusted. With the blade housing 14 fixed, 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. This changes the thickness of the galvanized layer and alters the performance of the steel wire.

[0067] After the pressure air knife has been 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 wire hole 13, and then the air pipe 23 can be operated to change the front and back position of the wire hole 13 to ensure that the steel wire is located in the center of the wire 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. The air outlet 17 and the inner wall of the wire hole 13 can be cleaned to avoid zinc slag blockage. At the same time, the height bolt 18 can be loosened to separate the blade core 15 and the blade shell 14, thereby cleaning the air chamber 16, improving the comprehensiveness of the cleaning and ensuring smooth airflow.

[0068] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A nitrogen-gas wiping pressure air knife, used for controlling the galvanizing of steel wire, characterized in that... It includes an air tube (1), a base (2), a frame (3) and an air knife unit (4). The upper end of the air tube (1) is connected to an air source, and the lower end of the air tube (1) is provided with the base (2). The frame (3) is adjustable left and right inside the base (2). The frame (3) includes an air box (301) and support plates (302) provided on both sides of the air box (301). The support plates (302) extend horizontally outward from the base (2). The air box (301) is placed inside the base (2) and slides left and right. The air box (301) is connected upward to the air tube (1). The air box (301) is threaded with an air pipe (23) on one side, and the other end of the air pipe (23) extends outward through the base (2). The air pipe (23) is arranged between two support plates (302). The air knife unit (4) is adjustable between the two support plates (302). The end of the support plate (302) is provided with a locking bolt (27). The locking bolt (27) cooperates with the air pipe (23) to clamp the air knife unit (4) from front to back. The air knife unit (4) includes a front blade (41) and a rear blade (42) with the same structure. The front blade (41) includes a blade shell (14) and a blade core (15). The blade shell (14) has a hollow cavity inside. The longitudinal section of the hollow cavity decreases from top to bottom and then expands. The blade core (15) is elastically connected to the upper and lower parts of the blade shell (14). The blade shell (14) and the blade core (15) together form an 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). The air outlet (17) is arranged inclined downwards. The distance between the upper and lower ends of the air outlet (17) is adjustable. The front blade (41) and the rear blade (42) are connected and combined to form an inner circle and an outer square cross section. The air chamber (16) between the front blade (41) and the rear blade (42) is connected. The blade cores (15) of the front blade (41) and the rear blade (42) are combined to form a cylindrical thread hole (13). The air outlet (17) is connected to the thread hole (13). The other end of the air pipe (23) is inserted into the front blade (41) and connected to the air chamber (16). The rear side of the blade shell (14) of the rear blade body (42) is also provided with two locking holes (28). Each of the support plates (302) is bent inward at the end and connected with a locking bolt (27). The locking bolt (27) abuts against the locking hole (28).

2. The nitrogen wiping pressure air knife according to claim 1, characterized in that, The trachea (1) is a cylindrical tube. The upper end of the trachea (1) is connected to an air connector (5). The air connector (5) is arranged perpendicular to the trachea (1). The air connector (5) passes through the trachea (1). The trachea (1) divides the air connector (5) into a front tube body (51) and a rear tube body (52). The rear tube body (52), the trachea (1) and the front tube body (51) are connected in sequence. The front tube body (51) is connected to an air source.

3. The nitrogen wiping pressure air knife according to claim 2, characterized in that, The air connector (5) is internally threaded 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) that extends into the air connector (5) has a hollow structure. Multiple air holes (7) are evenly opened around the side wall of the adjusting bolt (6). The front tube body (51) is connected to the air pipe (1) through the air holes (7).

4. The nitrogen wiping pressure air knife according to claim 1, characterized in that, The base (2) includes a bottom cover (201) and a base plate (202). The bottom cover (201) is a rectangular cover with a cross-section larger than that of the air pipe (1). An air intake ring (8) is provided on the top of the bottom cover (201). The air intake ring (8) passes through the bottom cover (201) and communicates with the air pipe (1). The bottom cover (201) extends vertically downward from the middle of the front and rear sides to form front and rear extension sections. The base plate (202) is bolted between the bottom of the front and rear extension sections.

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

6. The nitrogen wiping pressure air knife according to claim 4, characterized in that, An air receiving port (9) is provided above the air box (301). An air intake ring (8) passes downward through the air receiving port (9) and communicates with the air box (301). The cross-section of the air receiving port (9) is larger than that of the air intake ring (8). The air intake ring (8) slides left and right inside the air receiving port (9). The vent pipe (23) is a hollow external threaded pipe. The vent pipe (23) is arranged perpendicular to the air pipe (1). One end of the vent 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 vent pipe (23) to pass through.

7. The nitrogen wiping pressure air knife according to claim 1, characterized in that, The blade shell (14) is provided with support blocks (26) on both sides of its exterior. The blade shell (14) rests against the support plate (302) through the support blocks (26). The two support plates (302) hold the blade shell (14). The inner wall of the blade 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 from top to bottom.

8. The nitrogen wiping pressure air knife according to claim 7, characterized in that, The blade core (15) is arranged inside the blade shell (14). The outer wall of the blade 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) and the outer platform stage (141) fit together, and the inner platform stage (151) abuts against the outer platform stage (141). There is a gap between the inner conical section (152) and the outer conical section (142) to form the air cavity (16). There is a gap between the inner outlet section (153) and the outer outlet section (143) to form the air outlet (17).

9. The nitrogen wiping pressure air knife according to claim 8, characterized in that, A height bolt (18) is provided between the blade core (15) and the blade shell (14). There are at least two height bolts (18) on the front blade body (41) and the rear blade body (42). The height bolt (18) is threaded through the inner platform stage (151) of the blade core (15) and the outer conical section (142) of the blade shell (14). A compression spring (20) is also sleeved on the height bolt (18). The compression spring (20) is hidden in the inner platform stage (151). The compression spring (20) is pressed against the inner platform stage (151) of the blade core (15) and the outer platform stage (141) of the blade shell (14).

10. The nitrogen wiping pressure air knife according to claim 1, characterized in that, The front blade body (41) has a stepped through hole (25) in the middle of the blade shell (14). The air pipe (23) is connected to the air chamber (16) through the stepped through hole (25), and the end of the air pipe (23) abuts against the stepped through hole (25).

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