Low magnetic reinforcing bar residual magnetism intensity detection device

Abstract

The utility model belongs to building material detection technical field relates to a low magnetic reinforcing steel bar residual magnetism intensity detection device, including quantitative roller way conveying unit through magnetic shielding adjustment detection unit, ink jet marking unit is located on the quantitative roller way conveying unit of magnetic shielding adjustment detection unit discharge end side, magnetic shielding adjustment detection unit and ink jet marking unit are linearly installed in quantitative roller way conveying unit in proper order, the detection area of ink jet marking unit and magnetic shielding adjustment detection unit is coaxial arrangement. The utility model through quantitative roller way conveying unit sends the cooperation magnetic shielding adjustment detection unit, and the reinforcing steel bar can be transported into the magnetic shielding adjustment detection unit for detection at uniform speed continuously, better adapt to the production detection demand of large quantities of low magnetic reinforcing steel, simultaneously, the magnetic shielding adjustment detection unit can also adapt to different diameter reinforcing steel detection requirement and cover reinforcing steel circumferential surface comprehensively, through ink jet marking unit when detecting reinforcing steel residual magnetism intensity anomaly, ink jet marking can accurately correspond to the abnormal position.

Description

Technical Field

[0001] This utility model relates to the field of building material testing technology, and in particular to a device for testing the residual magnetic strength of low magnetic steel bars. Background Technology

[0002] In recent years, with the increasing demand for high-level near-zero magnetic environments, the demand for extremely weak magnetic reinforced concrete has been increasing. As one of the main building materials, the remanent magnetic strength of steel bars directly affects the overall magnetic properties of the project.

[0003] During the production and processing of low-magnetic rebar, factors such as thread cutting, clamping with ordinary tools, and impacts can all lead to localized magnetic anomalies. Traditional methods for detecting the magnetism of low-magnetic rebar are relatively simple, typically employing a combination of a magnetic shielding cylinder and a fluxgate magnetometer. The fluxgate magnetometer sensor is located in the center of the magnetic shielding cylinder, which is closed at one end and open at the other. During testing, at least two people are required to lift the rebar and horizontally insert it into the magnetic shielding cylinder from the open end, bringing it close to the sensor to test the remanent magnetization. If an abnormality is detected, the rebar is removed and the abnormal area is manually marked. Manual testing is slow and cannot meet the needs of mass production.

[0004] Moreover, it can only be detected at a single point at the end, and it cannot detect areas with abnormal magnetic properties in the middle. It is also difficult to capture the magnetic inhomogeneity in the circumferential direction of the steel bar, leading to missed detections. Utility Model Content

[0005] To address the aforementioned technical problems, this invention provides a device for detecting the residual magnetic intensity of low-magnetic steel bars, enabling high-precision and high-efficiency detection of the residual magnetic intensity of low-magnetic steel bars and marking of abnormal points.

[0006] The technical solution of this utility model is achieved through the following scheme: a device for detecting the residual magnetic strength of low magnetic steel bars, including a magnetic shielding adjustment detection unit, a quantitative roller conveyor unit, an inkjet marking unit, and a control console. The quantitative roller conveyor unit passes through the magnetic shielding adjustment detection unit. The inkjet marking unit is located on the quantitative roller conveyor unit on one side of the discharge end of the magnetic shielding adjustment detection unit. The magnetic shielding adjustment detection unit and the inkjet marking unit are linearly installed sequentially on the quantitative roller conveyor unit. The detection areas of the inkjet marking unit and the magnetic shielding adjustment detection unit are coaxially arranged. The magnetic shielding adjustment detection unit, the quantitative roller conveyor unit, and the inkjet marking unit are all communicatively connected to the control console.

[0007] Through the above technical solutions, the continuous conveying of the quantitative roller conveyor unit, in conjunction with the magnetic shielding adjustment detection unit, allows the steel bars to be automatically and uniformly conveyed for inspection. After one steel bar is inspected, the next steel bar can immediately enter the inspection area, saving manpower and time. This better meets the production and inspection needs of large-volume low-magnetic steel bars. At the same time, the magnetic shielding adjustment detection unit can also adapt to the inspection requirements of steel bars of different diameters and fully cover the circumference of the steel bars, effectively reducing the possibility of missed detections. The coaxial setting of the inkjet marking unit and the inspection area ensures that when abnormal residual magnetic strength of the steel bar is detected, the inkjet mark accurately corresponds to the abnormal position, avoiding the problem of inaccurate marking due to positional deviation.

[0008] Preferably, the magnetic shielding adjustment detection unit includes a magnetic shielding cylinder, several fluxgate sensors, and a probe mounting bracket. Both ends of the magnetic shielding cylinder are detachably fitted with a sealing plate. The sealing plate has through holes adapted to the quantitative roller conveyor unit. A probe mounting bracket is provided on one side of the sealing plate near the input end of the quantitative roller conveyor unit. Several fluxgate sensors are movably mounted on the probe mounting bracket.

[0009] Preferably, the fluxgate sensors include an upper sensor, a lower sensor, a left sensor, and a right sensor, which are arranged in a cross shape. The upper sensor and the lower sensor are arranged opposite each other, as are the left sensor and the right sensor. The upper sensor is movably mounted on the probe holder via a first probe adjustment component, and the left and right sensors are movably mounted on the probe holder via second probe adjustment components. The lower sensor is fixedly mounted on the probe holder.

[0010] Through the above technical solution, four sensors are arranged in a cross shape to detect the residual magnetic strength of the steel bar from the top, bottom, left, and right directions. This comprehensively captures the magnetic information at different positions along the circumference of the steel bar, effectively avoiding missed detections due to limitations in detection orientation. In conjunction with the adjustment components, the top, left, and right sensors can be independently adjusted according to the actual specifications of the steel bar, detection requirements, and on-site environmental factors. The magnetic shielding cylinder provides a relatively stable low magnetic environment for detection, and the fluxgate sensor can more accurately sense the weak residual magnetic signal generated by the steel bar itself, avoiding interference from external magnetic fields on the detection results.

[0011] Preferably, the quantitative roller conveyor unit includes non-magnetic rollers, a servo motor, and a conveying support. The conveying support is provided with a plurality of non-magnetic rollers, which are rotatably installed in the conveying support by the servo motor. The plurality of non-magnetic rollers are provided with a steel bar positioning groove in the middle of the plurality of non-magnetic rollers.

[0012] Preferably, the inkjet marking unit is located at the gap between two non-magnetic rollers.

[0013] Through the above technical solutions, a non-magnetic roller is used, which does not generate additional magnetic field interference during the conveying of low-magnetic steel bars. This allows the test results to more accurately reflect the residual magnetism of the steel bars, improving the accuracy of the test. The steel bar positioning groove accurately fixes the steel bars in a specific position, preventing them from rolling or shifting during the conveying process, further improving the accuracy of the test. The servo motor provides power to the non-magnetic roller and precisely controls the speed and direction of rotation of the non-magnetic roller according to preset parameters, so that the steel bars maintain a stable motion state during the conveying process.

[0014] Preferably, the inkjet marking unit includes a marking printhead, a printhead mounting bracket, and an ink tank. The printhead mounting bracket passes through the quantitative roller conveyor unit. An mounting ring is fixedly provided at the end of the printhead mounting bracket. Several marking printheads are installed in the mounting ring in a cross shape. The mounting ring is connected to the ink outlet of the pressure pump through an ink supply pipe. The ink suction port of the pressure pump is connected to the ink tank. The ink tank is installed on one side of the quantitative roller conveyor unit.

[0015] Through the above technical solutions, the cross-shaped marking nozzle and the cross-shaped sensor correspond to each other and communicate with the control console, which can accurately and comprehensively mark ink at abnormal locations. The mounting ring, ink supply tube, pressure pump and ink tank form an independent ink supply system, ensuring that the ink is delivered to the marking nozzle at a stable pressure and flow rate.

[0016] In summary, this utility model has the following beneficial effects: 1. This utility model utilizes a quantitative roller conveyor unit for continuous conveying in conjunction with a magnetic shielding adjustment detection unit. This allows for automatic and uniform conveying of reinforcing bars for inspection. After one reinforcing bar is inspected, the next can immediately enter the inspection area, saving manpower and time. This better meets the production and inspection needs of large-volume low-magnetic reinforcing bars. Simultaneously, the magnetic shielding adjustment detection unit can adapt to the inspection requirements of reinforcing bars of different diameters and fully cover the circumference of the reinforcing bars, effectively reducing the possibility of missed detections. The coaxial arrangement of the inkjet marking unit and the inspection area ensures that when abnormal residual magnetic strength of the reinforcing bar is detected, the inkjet mark accurately corresponds to the abnormal position, avoiding inaccurate marking due to positional deviation.

[0017] 2. Four sensors are arranged in a cross shape to detect the residual magnetic strength of the rebar from the top, bottom, left, and right directions. This comprehensively captures the magnetic information at different positions along the circumference of the rebar, effectively avoiding missed detections due to limitations in detection orientation. With the help of adjustment components, the top, left, and right sensors can be independently adjusted according to the actual specifications of the rebar, detection requirements, and on-site environmental factors. The magnetic shielding cylinder provides a relatively stable low magnetic environment for detection, and the fluxgate sensor can more accurately sense the weak residual magnetic signal generated by the rebar itself, avoiding interference from external magnetic fields on the detection results.

[0018] 3. The use of non-magnetic rollers prevents the generation of additional magnetic field interference during the transport of low-magnetic steel bars, allowing the test results to more accurately reflect the residual magnetism of the steel bars and improve the accuracy of the test. The steel bar positioning groove accurately fixes the steel bars in a specific position, preventing them from rolling or shifting during transport, further improving the accuracy of the test. The servo motor provides power to the non-magnetic rollers, and the speed and direction of rotation of the non-magnetic rollers are precisely controlled according to preset parameters, so that the steel bars maintain a stable movement state during transport.

[0019] 4. The cross-shaped marking nozzle and the cross-shaped sensor correspond to each other and communicate with the control console, which can accurately and comprehensively mark abnormal locations with inkjet ink. The mounting ring, ink supply tube, pressure pump and ink tank form an independent ink supply system, ensuring that the ink is delivered to the marking nozzle at a stable pressure and flow rate. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the assembly structure of the inkjet marking unit and the conveyor support of this utility model; Figure 3 This is a three-dimensional structural diagram of the quantitative roller conveyor unit of this utility model; Figure 4 This is a three-dimensional structural diagram of the magnetic shielding adjustment and detection unit of this utility model; Figure 5 This is a schematic diagram of the main structure of the magnetic shielding adjustment detection unit of this utility model; Figure 6 This is a magnified schematic diagram of the assembly structure of the fluxgate sensor of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Magnetic shielding adjustment and detection unit; 11. Magnetic shielding cylinder; 12. Fluxgate sensor; 13. Probe mounting bracket; 14. First probe adjustment component; 15. Second probe adjustment component; 151. Horizontal sliding mounting bracket; 152. Drive screw; 2. Quantitative roller conveyor unit; 21. Non-magnetic roller; 22. Rebar positioning groove; 23. Servo motor; 24. Conveyor support; 3. Inkjet marking unit; 31. Marking nozzle; 32. Nozzle holder; 33. Ink tank; 34. Pressure pump; 4. Control console. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification. The present invention will be further described in detail below with reference to the accompanying drawings.

[0024] A device for detecting the residual magnetism of low-magnetic steel bars, such as Figures 1-6 As shown, the system includes a magnetic shielding adjustment and detection unit 1, a quantitative roller conveyor unit 2, an inkjet marking unit 3, and a control console 4. The quantitative roller conveyor unit 2 passes through the magnetic shielding adjustment and detection unit 1. The inkjet marking unit 3 is located on the quantitative roller conveyor unit 2 on the discharge end side of the magnetic shielding adjustment and detection unit 1. The magnetic shielding adjustment and detection unit 1 and the inkjet marking unit 3 are linearly installed sequentially on the quantitative roller conveyor unit 2. The detection areas of the inkjet marking unit 3 and the magnetic shielding adjustment and detection unit 1 are coaxially arranged to ensure that the marking position is aligned with the abnormal point. The magnetic shielding adjustment and detection unit 1, the quantitative roller conveyor unit 2, and the inkjet marking unit 3 are all communicatively connected. The control console 4 and the inkjet marking unit 3 are located outside the detection area of ​​the magnetic shielding adjustment detection unit 1. The marking nozzle 31 of the unit communicates with the magnetic fluxgate sensor 12 of the magnetic shielding adjustment detection unit 1. When an abnormal point moves to the marking position, the corresponding nozzle is triggered to automatically mark the magnetic abnormal position with ink. When the quantitative roller conveyor unit 2 conveys the steel bars, it can perfectly pass through the magnetic shielding adjustment detection unit 1 and the inkjet marking unit 3. The quantitative roller conveyor unit 2 passes through the magnetic shielding adjustment detection unit 1 to form a continuous conveying channel, ensuring that the steel bars pass through the detection area and the marking area at a stable speed and are linearly arranged to form an integrated "detection-marking" process.

[0025] The magnetic shielding adjustment and detection unit 1 includes a magnetic shielding cylinder 11, several fluxgate sensors 12, and a probe mounting bracket 13. Both ends of the magnetic shielding cylinder 11 are detachably equipped with sealing plates. The sealing plates have through holes adapted to the quantitative roller conveyor unit 2. The side of the sealing plate near the input end of the quantitative roller conveyor unit 2 is equipped with a probe mounting bracket 13. Several fluxgate sensors 12 are movably mounted on the probe mounting bracket 13. The quantitative roller conveyor unit 2 overlaps with the through holes of the two sealing plates, thereby allowing the quantitative roller conveyor unit 2 to be erected in the magnetic shielding cylinder 11 so that the reinforcing bars can pass through the magnetic shielding cylinder 11 at a uniform speed. The quantitative roller conveyor unit 2 ensures that the inkjet marking unit 3 and the magnetic shielding cylinder 11 are seamlessly connected. The fluxgate sensors 12 are located at the feed end and can be detected when the reinforcing bars enter the magnetic shielding cylinder 11. The probe mounting bracket 13 is installed at the through hole of the sealing plate through which the quantitative roller conveyor unit 2 passes.

[0026] The probe mounting bracket 13 includes an upper mounting bracket and a lower mounting bracket. The lower mounting bracket is located in the gap between the rebar positioning grooves 22 on the two non-magnetic rollers 21, allowing the lower sensor to accurately detect the lower circumference of the rebar without hindering the rebar conveying. The upper mounting bracket is gate-shaped, with an upper sensor, a left sensor, and a right sensor installed on the top and left and right sides to comprehensively acquire the magnetic field information of the rebar on different circumferences. The non-magnetic rollers 21 and the rebar positioning grooves 22 on them of the quantitative roller conveyor unit 2 are located between the upper and lower mounting brackets, and are centrally positioned.

[0027] Several fluxgate sensors 12 include an upper sensor, a lower sensor, a left sensor, and a right sensor, which are arranged in a cross shape. The upper and lower sensors are set opposite each other, as are the left and right sensors. The upper sensor is movably mounted on the probe holder 13 via a first probe adjustment component 14. The left and right sensors are movably mounted on the probe holder 13 via second probe adjustment components 15, respectively. The lower sensor is fixedly mounted on the probe holder 13. The four sensors are evenly distributed in a 90° cross shape to achieve full circumferential coverage detection of the reinforcing bars. The positions of the left, right, and upper sensors can be finely adjusted to meet the detection distance requirements of reinforcing bars of different diameters. The sensors are connected to a signal processing module to analyze magnetic data in real time.

[0028] like Figure 6 As shown, both the first probe adjustment component 14 and the second probe adjustment component 15 are finely adjusted manually. The first probe adjustment component 14 consists of a screw and a platform. By turning the screw, the platform is raised and lowered to adjust the position of the upper sensor. The second probe adjustment component 15 includes a horizontal moving mounting bracket 151 and a drive screw 152. The drive screw 152 is located on the upper fixed bracket of the probe fixing bracket 13 and is located in the vertical block of the portal frame. The lower part of the horizontal moving mounting bracket 151 is screwed to the drive screw 152, and the upper part is slidably installed in the slide groove of the vertical block. The left sensor and the right sensor are respectively embedded in the end face of the corresponding horizontal moving mounting bracket 151. There are two second probe adjustment components 15, which are arranged opposite each other in the two vertical blocks.

[0029] When the positions of the left and right sensors need to be adjusted, the operator rotates the drive screw 152. Due to the screwed connection between the transverse mounting bracket 151 and the drive screw 152 and its sliding installation in the slide groove, the transverse mounting bracket 151 will move laterally along the slide groove, thereby driving the left or right sensor to achieve fine-tuning of its position.

[0030] The quantitative roller conveyor unit 2 includes non-magnetic rollers 21, a servo motor 23, and a conveyor support 24. Several non-magnetic rollers 21 are mounted on the conveyor support 24 and are rotatably installed within the support 24 via the servo motor 23. Each non-magnetic roller 21 has a rebar positioning groove 22 in its center. The non-magnetic rollers 21 are made of rubber or nylon, effectively preventing the influence of the roller's own magnetism on the acquisition of the rebar's magnetic field signal, ensuring the accuracy and reliability of the detection data. The servo drive wheel has an encoder for precise positioning of the rebar displacement, and its speed is adjustable. The rebar positioning groove 22 is a V-shaped groove that automatically centers the rebar. The V-shaped groove has unique geometric characteristics; when the rebar is placed on the roller, regardless of its initial position, under the guidance of gravity and the V-shaped groove, the rebar will automatically slide towards the center of the groove, achieving automatic centering. This improves the stability and positioning accuracy of the rebar conveying, providing a foundation for subsequent detection and marking work. The servo motor 23 drives the first non-magnetic roller 21, and the other ends of the multiple non-magnetic rollers 21 are connected by gear meshing for quantitative power transmission.

[0031] There is a gap between each pair of non-magnetic rollers 21. The inkjet marking unit 3 is located at the gap between the two non-magnetic rollers 21, facing the discharge port of the magnetic shielding cylinder 11. When the steel bar is conveyed at a constant speed on the non-magnetic rollers 21 by the servo motor 23, the inkjet marking unit 3 can accurately spray the marking on the designated position of the steel bar, realizing the seamless connection between conveying and marking.

[0032] The inkjet marking unit 3 includes marking printheads 31, a printhead mounting bracket 32, and an ink tank 33. The printhead mounting bracket 32 ​​passes through the quantitative roller conveyor unit 2. A mounting ring is fixed at the end of the printhead mounting bracket 32. Several marking printheads 31 are installed in a cross shape inside the mounting ring. The mounting ring is connected to the ink outlet of the pressure pump 34 through an ink supply pipe. The ink suction port of the pressure pump 34 is connected to the ink tank 33. The ink tank 33 is installed on one side of the quantitative roller conveyor unit 2. Preferably, there are four marking printheads 31, which are distributed at a 90-degree angle to the center of the mounting ring. A flow channel is provided inside the mounting ring. The portion of the ink supply pipe outside the conveyor bracket 24 is... The ink supply tube, which is rigid and tied to the side of the conveyor bracket 24 with a flexible hose, is used to prevent it from sinking under stress and being caught in the non-magnetic roller 21. It communicates with the four fluxgate sensors 12 one by one. The marking nozzle 31 is a solenoid valve nozzle, which has a fast response speed and precise control. It opens or closes quickly according to the electrical signal to achieve precise control of ink spraying. When the marking command is received, the solenoid valve opens instantly, and the ink is sprayed out at an appropriate pressure and flow rate to form a clear and accurate mark on the steel surface. When the marking is completed, the solenoid valve closes immediately to avoid ink waste and over-spraying.

[0033] The parts and equipment all adopt conventional models in the existing technology. In addition, the circuit connection and communication connection adopt conventional connection methods in the existing technology. For example, the connection between the control console 4 and the electric furnace of each component and the communication connection are not considered as the technical problems to be solved or the objects of protection of this utility model, and will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0034] Working principle: The staff first adjusts the positions of the three sensors (top, left, and right) according to the size of the steel bar, and then puts the steel bar into the steel bar positioning groove 22 of the quantitative roller conveyor unit 2. The roller is driven by the servo motor 23 to convey the steel bar at a uniform speed. The steel bar enters the detection area, and the four fluxgate sensors 12 perform magnetic detection on the steel bar. At the same time, the control console 4 synchronously records the magnetic field data of the circumferential direction of the steel bar collected by the magnetic shielding adjustment detection unit 1. The signal processing module on console 4 analyzes the data to determine if there is any magnetic anomaly. If an anomaly is detected, the control system records the location of the anomaly and triggers the corresponding marking nozzle 31 in the inkjet marking unit 3. Because the steel bar is conveyed at a constant speed under the control of the servo system, the position of the steel bar can be accurately located, so that the marking nozzle 31 can spray marking on its abnormal surface.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A device for detecting the residual magnetism of low-magnetic steel bars, characterized in that: The device includes a magnetic shielding adjustment detection unit (1), a quantitative roller conveyor unit (2), an inkjet marking unit (3), and a control console (4). The quantitative roller conveyor unit (2) passes through the magnetic shielding adjustment detection unit (1). The inkjet marking unit (3) is located on the quantitative roller conveyor unit (2) on the side of the discharge end of the magnetic shielding adjustment detection unit (1). The magnetic shielding adjustment detection unit (1) and the inkjet marking unit (3) are linearly installed on the quantitative roller conveyor unit (2) in sequence. The detection area of ​​the inkjet marking unit (3) and the magnetic shielding adjustment detection unit (1) is coaxially arranged. The magnetic shielding adjustment detection unit (1), the quantitative roller conveyor unit (2), and the inkjet marking unit (3) are all communicatively connected to the control console (4).

2. The device for detecting the residual magnetism of low-magnetic steel bars according to claim 1, characterized in that: The magnetic shielding adjustment detection unit (1) includes a magnetic shielding cylinder (11), several fluxgate sensors (12) and a probe holder (13). Both ends of the magnetic shielding cylinder (11) are detachably equipped with a sealing plate. The sealing plate has through holes adapted to the quantitative roller conveyor unit (2). The side of the sealing plate near the input end of the quantitative roller conveyor unit (2) is equipped with a probe holder (13). Several fluxgate sensors (12) are movably mounted on the probe holder (13).

3. The device for detecting the residual magnetism of low-magnetic steel bars according to claim 2, characterized in that: The fluxgate sensors (12) include an upper sensor, a lower sensor, a left sensor, and a right sensor. The upper sensor, lower sensor, left sensor, and right sensor are arranged in a cross shape. The upper sensor and the lower sensor are arranged opposite each other. The left sensor and the right sensor are arranged opposite each other. The upper sensor is movably mounted on the probe holder (13) through a first probe adjustment component (14). The left sensor and the right sensor are movably mounted on the probe holder (13) through a second probe adjustment component (15). The lower sensor is fixedly mounted on the probe holder (13).

4. The device for detecting the residual magnetism of low-magnetic steel bars according to claim 1, characterized in that: The quantitative roller conveyor unit (2) includes a non-magnetic roller (21), a servo motor (23) and a conveying bracket (24). The conveying bracket (24) is provided with a plurality of non-magnetic rollers (21). The plurality of non-magnetic rollers (21) are rotatably installed in the conveying bracket (24) by the servo motor (23). The middle part of the plurality of non-magnetic rollers (21) is provided with a steel bar positioning groove (22).

5. The device for detecting the residual magnetism of low-magnetic steel bars according to claim 4, characterized in that: The inkjet marking unit (3) is located in the gap between the two non-magnetic rollers (21).

6. The device for detecting the residual magnetism of low-magnetic steel bars according to claim 1, characterized in that: The inkjet marking unit (3) includes a marking nozzle (31), a nozzle mounting bracket (32), and an ink tank (33). The nozzle mounting bracket (32) passes through the quantitative roller conveyor unit (2). An installation ring is fixed at the end of the nozzle mounting bracket (32). Several marking nozzles (31) are installed in the installation ring in a cross shape. The installation ring is connected to the ink outlet of the pressure pump (34) through an ink supply pipe. The ink suction port of the pressure pump (34) is connected to the ink tank (33). The ink tank (33) is installed on one side of the quantitative roller conveyor unit (2).

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