Quality detection equipment for zinc layer of galvanized steel strip

Abstract

Quality detection equipment for a zinc layer of a galvanized steel strip relates to the field of steel strip quality detection and comprises a fixing frame, a bending mechanism and a flattening mechanism, the bending mechanism and the flattening mechanism are arranged in the fixing frame, the bending mechanism comprises a horizontally-arranged bending bottom plate and a bending head suspended above the bending bottom plate, the bending bottom plate is provided with a bending groove corresponding to the bending head up and down, and the bending groove is provided with a pressing groove corresponding to the bending head up and down. The flattening mechanism comprises a horizontally-arranged flattening bottom plate and a flattening top plate suspended above the flattening bottom plate, the distance between the lowest end of the bending head and the bottom of the bending groove is equal to the distance between the flattening top plate and the flattening bottom plate, and the bending head and the flattening top plate are both connected with a power mechanism used for driving the bending head and the flattening top plate to move up and down. According to the detection equipment, the labor intensity of workers can be greatly reduced, the sample size can be reduced, the steel strip yield can be improved, the product benefit can be increased, the detection process is standardized, and the detection equipment can play a good guiding role in the quality control of the zinc layer of the steel strip.

Description

Technical Field

[0001] The utility model relates to the field of steel strip quality detection, in particular to a device for detecting the quality of zinc layer of galvanized steel strip. Background Art

[0002] Galvanized steel strip has many excellent properties such as good corrosion resistance, aesthetics, high mechanical strength and plasticity. It not only extends the service life of the product, improves product quality, reduces maintenance costs, but also increases added value and market competitiveness for the product. It has been widely used in many industries such as construction, automobile manufacturing, and home appliance industry.

[0003] The quality inspection of the zinc layer of galvanized steel strip is particularly important. After the galvanized steel strip is prepared in the existing technology, it is necessary to conduct a bending test on the galvanized steel strip regularly. Specifically, the steel strip is bent 180° and the peeling state of the coating is observed to detect whether the zinc layer of the steel strip is easy to fall off.

[0004] Currently, the original method of manual bending followed by hammering with a hand hammer is mostly used, which has the following problems: 1. High labor intensity for workers; 2. When producing steel strips with a thickness of 3.0 mm or more, manual bending is very difficult due to the thickness of the steel strips, and the bending effect is poor, making it impossible to effectively detect whether dezincification has occurred, posing a quality risk of dezincified steel strips entering the market; 3. Due to manual bending, the steel strip sample size needs to be larger to facilitate bending, especially for thicker steel strips, which has a larger size, resulting in waste of steel strip sampling and a significant impact on the yield rate.

[0005] There is also a method in the existing technology of bending galvanized steel strips using a bending machine, but due to the limited bending angle of the bending machine, it is usually necessary to bend the galvanized steel strip first, and then hammer it with a hand hammer to bend the steel strip 180°. Although this semi-mechanized and semi-manual inspection method reduces labor intensity to a certain extent, it still needs further improvement. Utility Model Content

[0006] The utility model aims to provide a galvanized steel strip zinc layer quality detection device, so as to further reduce the labor intensity during the galvanized steel strip zinc layer quality detection and improve the detection effect.

[0007] In order to achieve the above-mentioned purpose, the specific scheme adopted by the utility model is: a galvanized steel strip zinc layer quality inspection equipment, including a fixed frame, a bending mechanism and a flattening mechanism arranged in the fixed frame, the bending mechanism includes a horizontally arranged bending base plate and a bending head suspended above the bending base plate, the bending base plate is provided with a bending groove corresponding to the upper and lower parts of the bending head, the flattening mechanism includes a horizontally arranged flattening base plate and a flattening top plate suspended above the flattening base plate, the distance between the lowermost end of the bending head and the bottom of the bending groove is the same as the distance between the flattening top plate and the flattening base plate, and the bending head and the flattening top plate are both connected to a power mechanism for driving them to move up and down.

[0008] As a further optimization of the above technical solution: the power mechanism is a hydraulic cylinder, electric cylinder or air cylinder with a telescopic rod, the cylinder body of the power mechanism is arranged on the top of the fixed frame, the axis of the telescopic rod of the power mechanism is perpendicular to the plane where the bending bottom plate and the flattening bottom plate are located, and the bending head and the flattening top plate are both arranged at the lower end of the telescopic rod.

[0009] As a further optimization of the above technical solution: a long strip connecting plate is fixed to the lower end of the telescopic rod, and the bending head and the flattening top plate are fixed to the connecting plate and are spaced apart along the length direction of the connecting plate.

[0010] As a further optimization of the above technical solution: the fixing frame includes a mounting base plate, a mounting top plate and multiple vertical support columns connected between the mounting base plate and the mounting top plate, the bending base plate and the flattening base plate are both fixed on the mounting base plate, and the power mechanism is fixed on the mounting top plate.

[0011] As a further optimization of the above technical solution: multiple vertical support columns are arranged along the circumference of the installation base plate, grid plates are arranged between adjacent support columns, and at least one grid plate is rotatably connected to the fixed frame to form a channel for the galvanized steel strip to enter and exit.

[0012] As a further optimization of the above technical solution: the bending head includes a flat section and a bending section, the cross sections of the bending section and the bending groove are both V-shaped, and the cross section area of ​​the bending section is smaller than the cross section area of ​​the bending groove.

[0013] As a further optimization of the above technical solution: the bottom of the bending groove and the lower end surface of the bending section are both arc-shaped.

[0014] As a further optimization of the above technical solution: an ejection assembly is embedded in the bottom of the bending groove, and the ejection assembly includes a plug and a spring arranged at the lower end of the plug. When the spring is compressed, the upper end surface of the plug is not higher than the bottom of the bending groove. When the spring is reset, the upper end surface of the plug is higher than the bottom of the bending groove.

[0015] As a further optimization of the above technical solution: there are multiple ejection assemblies and they are arranged at intervals along the length direction of the bending groove. The bottom of the bending groove is provided with multiple accommodating grooves distributed at intervals along its length direction. The number of accommodating grooves is the same as the number of ejection assemblies. The lower end of the spring of the ejection assembly is fixed to the bottom of the accommodating groove, and the upper end is fixed to the lower end of the ejector head. The depth of the accommodating groove is greater than the length of the spring in the reset state.

[0016] As a further optimization of the above technical solution: the upper end surface of the plug is an arc surface with the same arc as the bottom of the bending groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The utility model arranges a bending mechanism and a flattening mechanism in a fixed frame. After the galvanized steel strip is bent by the bending mechanism, it is transferred to the flattening mechanism for flattening. Both the bending and flattening processes are powered by a power mechanism, which can greatly reduce the labor intensity of workers, reduce the sample size, improve the yield rate of the steel strip, increase product benefits, and standardize the detection process, which can play a good guiding role in the quality control of the zinc layer of the steel strip.

[0019] The galvanized steel strip is bent by the bending head and falls into the bending groove. At this time, the steel strip needs to be pulled upward first and then taken out. By setting an ejector assembly in the bending groove, after the bending head is separated from the upper surface of the steel strip, the spring of the ejector assembly resets the part of the bent steel strip that is trapped in the bending groove and pops out, making it easy to remove the steel strip for subsequent operations and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0021] Figure 2 This is a side structural diagram of the present utility model;

[0022] Figure 3 Schematic top view of the bent bottom plate and the flattened bottom plate in the present invention;

[0023] Figure 4 This is a schematic diagram of the main structure of the utility model (with a mesh plate installed);

[0024] Figure 5 A schematic side cross-sectional view of a detection device having an ejection assembly;

[0025] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0026] Figure 7 A schematic top view of a testing device with an ejector assembly, a bent bottom plate, and a flattened bottom plate;

[0027] Figure 8 This is a schematic diagram of the main structure of the detection equipment installed with a guide cylinder;

[0028] Figure markings: 1. Fixed frame, 101. Installing top plate, 1011. Guide cylinder, 102. Support column, 103. Installing bottom plate, 2. Connecting plate, 3. Power mechanism, 301. Cylinder body, 302. Telescopic rod, 4. Bending mechanism, 401. Bending head, 4011. Flat plate section, 4012. Bending section, 402. Bending bottom plate, 403. Bending groove, 404. Ejector assembly, 4041. Ejector head, 4042. Spring, 405. Accommodating groove, 5. Flattening mechanism, 501. Flattening top plate, 502. Flattening bottom plate, 6. Grid plate, 7. Handle. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further elaborated in detail below in conjunction with specific embodiments. The parts that are not described and disclosed in detail in the following embodiments of the present invention should be understood as existing technologies that are known or should be known to those skilled in the art, such as the specific structure and working mode of the hydraulic cylinder, the specific structure of the mesh partition, etc.

[0030] Example 1

[0031] like Figure 1 、 2 As shown, the utility model discloses a galvanized steel strip zinc layer quality detection equipment, including a fixing frame 1, a bending mechanism 4 and a flattening mechanism 5 arranged in the fixing frame 1, the fixing frame 1 is a rectangular frame, including a mounting base plate 103, a mounting top plate 101 and a plurality of vertical support columns 102 connected between the mounting base plate 103 and the mounting top plate 101, the mounting base plate 103 and the mounting top plate 101 have the same size and are both rectangular, the number of support columns 102 is four and they are respectively fixed at the four corners of the rectangular mounting base plate 103 and the mounting top plate 101, the support columns 102 and the mounting base plate 103 and the mounting top plate 101 are fixedly connected, the specific fixing method is the existing technology, welding or bolt connection is acceptable, in this embodiment, the support columns 102 and the mounting base plate 103 and the mounting top plate 101 are all fixed by welding.

[0032] The bending mechanism 4 and the flattening mechanism 5 are arranged at intervals along the length direction of the rectangular frame. Specifically, the bending mechanism 4 includes a horizontally arranged bending base plate 402 and a bending head 401 suspended above the bending base plate 402. The flattening mechanism 5 includes a horizontally arranged flattening base plate 502 and a flattening top plate 501 suspended above the flattening base plate 502. The bending base plate 402 and the flattening base plate 502 are both arranged on the mounting base plate 103 and are spaced apart along the length direction of the mounting base plate 103. The bending head 401 and the flattening top plate 501 are arranged along the mounting base plate 103. The top plate 101 is arranged at intervals in the length direction, and the bending head 401 and the flattening top plate 501 are both connected to a power mechanism 3 for driving them to move up and down. The power mechanism 3 includes a cylinder 301 and a telescopic rod 302. The bending head 401 and the flattening top plate 501 are both connected to the lower end of the telescopic rod 302. The bending head 401 and the flattening top plate 501 are driven up and down by the telescopic rod 302 to perform corresponding bending or flattening processing on the workpiece (i.e., the galvanized steel strip to be tested) on the bending bottom plate 402 and the flattening bottom plate 502.

[0033] The bending head 401 is a vertically arranged rectangular plate structure, the length direction of which is consistent with the length direction of the bottom of the rectangular frame, and the width direction is the vertical direction. The bending head 401 includes a flat section 4011 and a bending section 4012 arranged in sequence from top to bottom. The cross section of the flat section 4011 is rectangular, and the cross section of the bending section 4012 is V-shaped. The upper end of the bending section 4012 is connected to the flat section 4011 and is integrally formed, and the lower end is used to bend the workpiece to be inspected.

[0034] Combine Figure 3 As shown, a bending groove 403 is formed on the upper surface of the bending base plate 402. The bending groove 403 is long and narrow, with its length aligned with the length of the mounting base plate 103 and corresponding to the bending head 401 in the vertical direction. The cross-section of the bending groove 403 is V-shaped, and the cross-sectional area of ​​the bending groove 403 is greater than the cross-sectional area of ​​the bending section 4012. Specifically, the width of the bending groove 403 is greater than the thickness of the flat section 4011 of the bending head 401. The bending section 4012 can be inserted into the bending groove 403. After the bending section 4012 is inserted into the bending groove 403, a certain gap is left between the side wall of the bending section 4012 and the groove wall of the bending groove 403 to accommodate the bent portion of the workpiece to be measured.

[0035] In order to facilitate the removal of the bent workpiece from the bending base plate 402, the bottom of the bending groove 403 and the lower end face of the bending section 4012 are both arc-shaped. It should be noted that the lower end face refers to the lower end face of the bending groove 403 and the bending section 4012 when viewed from the side, that is, the two groove walls of the V-shaped bending groove 403 are connected by the arc-shaped groove bottom, and the two side walls of the V-shaped bending section 4012 are connected by the arc-shaped bottom face.

[0036] The distance between the lower end of the bending head 401 and the bottom of the bending groove 403 is the same as the distance between the flattening top plate 501 and the flattening bottom plate 502 to avoid mutual interference between the bending process and the flattening process in actual application. During the sheeting operation, a workpiece to be flattened is placed between the flattening top plate 501 and the flattening bottom plate 502, and the power mechanism 3 drives the flattening top plate 501 to move downward to sheet the workpiece. At this time, a gap of at least the thickness of the workpiece is left between the lower end of the bending head 401 and the bottom of the bending groove 403 to avoid premature contact between the bending head 401 and the bottom of the bending groove 403 to affect the flattening effect; similarly, during the bending operation, a workpiece to be bent is placed between the bending head 401 and the bending groove 403, and the power mechanism 3 waits for the bending head 401 to move downward to bend the workpiece. At this time, a gap of at least the thickness of the workpiece is left between the flattening top plate 501 and the flattening bottom plate 502 to avoid premature contact between the flattening top plate 501 and the flattening bottom plate 502 to affect the bending effect.

[0037] The power mechanism 3 is a hydraulic cylinder, electric cylinder, or pneumatic cylinder of the prior art. It is only necessary to ensure that the power mechanism 3 has a telescopic rod 302 that can move up and down. The cylinder body 301 of the power mechanism 3 is arranged on the mounting top plate 101 at the top of the fixed frame 1 and is fixed to the upper plate surface of the mounting top plate 101. The mounting top plate 101 is provided with a through hole for the telescopic rod 302 to pass through. The diameter of the through hole is slightly larger than the outer diameter of the telescopic rod 302 so that the telescopic rod 302 can slide up and down in the through hole. The telescopic rod 302 of the power mechanism 3 is arranged vertically and perpendicular to the mounting top plate 101. The bending head 401 and the flattening top plate 501 are both arranged at the lower end of the telescopic rod 302. The axis of the telescopic rod 302 is perpendicular to the plane where the flattening top plate 501, the bending bottom plate 402, and the flattening bottom plate 502 are located.

[0038] Specifically, in this embodiment, the power mechanism 3 used is a hydraulic cylinder. Figure 1 、 2 As shown, the cylinder body 301 of the hydraulic cylinder is fixed to the upper plate surface of the mounting top plate 101, and the cylinder body 301 and the mounting top plate 101 are fixed by fixing bolts. This fixing method is a prior art and will not be described here. A long strip of connecting plate 2 is fixed to the lower end of the telescopic rod 302. The bending head 401 and the flattening top plate 501 are both fixed to the connecting plate 2 and spaced apart along the length direction of the connecting plate 2. The length direction of the connecting plate 2 is consistent with the length direction of the rectangular frame, and the length direction of the bending head 401 is the same as the length direction of the connecting plate 2, that is, the plane where the bending head 401 is located is coplanar or parallel to the plane where the connecting plate 2 is located, and the flattening top plate 501 is vertically fixed to the bottom of the connecting plate 2.

[0039] It can be understood that the connecting plate 2 at the lower end of the telescopic rod 302 can also be a connecting block, connecting rod or other forms. It is only necessary to ensure the relative positions of the bending head 401 and the flattening top plate 501 in the bending mechanism 4 and the flattening mechanism 5; the bending mechanism 4 and the flattening mechanism 5 of this embodiment are driven by a power mechanism 3. In addition, the bending mechanism 4 and the flattening mechanism 5 can also be respectively provided with a motive mechanism. When the power mechanism 3 is separately provided, the bending head 401 and the flattening top plate 501 can be respectively installed at the lower end of the telescopic rod 302 of the corresponding power mechanism 3.

[0040] In other embodiments of the present invention, Figure 8 As shown, a guide cylinder 1011 is vertically fixed to the lower plate surface of the mounting top plate 101. The guide cylinder 1011 is concentrically distributed with a through hole opened on the mounting top plate 101 for the guide cylinder 1011 to pass through. The guide cylinder 1011 is sleeved on the outside of the telescopic rod 302 to ensure that the bending head 401 and the flattening top plate 501 move along the designed trajectory, and can maintain the stability of the up and down movement of the telescopic rod 302 to avoid deviation during the up and down movement, which affects the flattening or bending effect.

[0041] In order to ensure the safety of operation during the workpiece inspection process, such as Figure 4 As shown, a mesh plate 6 is provided between adjacent support columns 102, and at least one mesh plate 6 is rotatably connected to the fixing frame 1 to form a passage for the galvanized steel strip to enter and exit. In this embodiment, two mesh plates 6 are provided between two support columns 102, and both mesh plates 6 are rotatably provided between the mounting top plate 101 and the mounting bottom plate 103. Handles 7 are provided on the surfaces of the two mesh plates 6. Pulling the handles 7 can control the rotation of the mesh plates 6, thereby opening the passage for the galvanized steel strip to enter and exit, making it easier to place or remove workpieces onto the bending bottom plate 402 and the flattening bottom plate 502. The method of fixing the mesh plates 6 between adjacent support columns 102 and the method of rotatably connecting the mesh plates 6 to the mounting bottom plate 103 and the mounting top plate 101 are both prior art and will not be described in detail here.

[0042] When the utility model is in use, first pull the handle 7 to rotate the grid plate 6, open the channel for the galvanized steel strip to enter and exit, place the galvanized steel strip to be bent on the bending bottom plate 402, and the galvanized steel strip covers the notch of the bending groove 403, start the power mechanism 3, and the telescopic rod 302 drives the bending head 401 to move downward, and the bending head 401 moves down to the upper surface of the galvanized steel strip and pushes the galvanized steel strip to continue to move downward, and the bending head 401 enters the bending groove 403, and the galvanized steel strip is bent at the same time; then, the telescopic rod 302 is used to move the bending head 401 ... enters the bending groove 403, and the galvanized steel strip is bent at the same time; then, the telescopic rod 302 is used to move the bending head 401 downward, and the telescopic rod 302 is used to move the bending head 401 downward, and the telescopic rod 302 is used to move the bending head 401 downward, and the telescopic rod 302 is used to move the bending head 401 downward, and the telescopic rod 302 is used to move the bending head 401 downward, and the telescopic rod 302 is used to move the bending head 401 The rod 302 drives the bending head 401 to move upward, opens the channel for the galvanized steel strip to enter and exit, takes the bent galvanized steel strip out of the bending groove 403 and places it on the flattening bottom plate 502, and the telescopic rod 302 drives the flattening top plate 501 to move downward, flattens the bent galvanized steel strip along its bending point to 180°, thus completing the folding of the galvanized steel strip. Then, the existing technology is installed to observe the coating peeling state and judge the suitability of the galvanizing process. This is used as one of the product inspection items to guide industrial production.

[0043] The bending and flattening processes of the utility model are both powered by a power mechanism, which can greatly reduce the labor intensity of workers and reduce the sample size. There is no need to select large-sized steel strips for the convenience of manual bending, thereby improving the yield rate of steel strips and increasing product benefits. In addition, the detection process is standardized, which can play a good guiding role in the quality control of the zinc layer of the steel strip.

[0044] Example 2

[0045] The overall structure of this embodiment is the same as that of embodiment 1, except that, in this embodiment, Figure 5-7 As shown, an ejection assembly 404 is embedded in the bottom of the bending groove 403. There are multiple ejection assemblies 404 and they are spaced apart along the length of the bending groove 403. The bottom of the bending groove 403 is provided with multiple receiving grooves 405 spaced apart along its length. The number of receiving grooves 405 is the same as the ejection assemblies 404. The receiving groove 405 is a cylindrical groove with an upward opening. The depth direction of the receiving groove 405 is the vertical direction. The ejection assembly 404 includes a head 4041 and a spring 4042 provided at the lower end of the head 4041. The lower end of the spring 4042 is fixed to the bottom of the receiving groove 405, and the upper end is fixed to the lower end of the head 4041.

[0046] When the spring 4042 is in the compressed state, the upper end surface of the plug 4041 is not higher than the bottom of the bending groove 403. When the spring 4042 is in the reset state, the upper end surface of the plug 4041 is higher than the bottom of the bending groove 403, and the length of the spring 4042 in the reset state is less than the depth of the receiving groove 405. When the spring 4042 is in the reset state, the upper end surface of the plug 4041 is higher than the bottom of the bending groove 403, and the lower end surface of the plug 4041 is located in the receiving groove 405, which facilitates the axial reciprocating movement of the plug 4041 along the receiving groove 405, so as to prevent the spring 4042 from being too long and causing the plug 4041 to disengage from the receiving groove 405 when the spring 4042 is reset, and it is easy to deviate when entering the receiving groove 405 later, affecting the smooth entry of the plug 4041 into the receiving groove 405.

[0047] When the bottom of the bending groove 403 is an arc surface, the upper end surface of the head 4041 of the ejection component 404 is an arc surface with the same curvature as the bottom of the bending groove 403, so that when the spring 4042 is in a compressed state, the upper end surface of the ejection component 404 is flush with the bottom of the bending groove 403.

[0048] When the present embodiment is in use, the galvanized steel strip to be bent is first placed on the bending bottom plate 402 and the galvanized steel strip covers the notch of the bending groove 403, the power mechanism 3 is started, the telescopic rod 302 drives the bending head 401 to move downward, the bending head 401 moves down to the upper surface of the galvanized steel strip and pushes the galvanized steel strip to continue to move downward, and the galvanized steel strip contacts the upper end of the head 4041 of the ejection assembly 404 during the downward movement, and the galvanized steel strip continues to move downward to push the head 4041 into the receiving groove 405, and the galvanized steel strip is bent in the bending groove 403. At this time, the spring 4042 is in the compression position. The galvanized steel strip is pushed upward by the top head 4041 so as to be loosened in the bending groove 403, which makes it easier for the operator to take the galvanized steel strip out of the bending groove 403 for subsequent flattening operations, thereby improving work efficiency. The flattening process is the same as that in Example 1 and will not be described again here.

[0049] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A galvanized steel strip zinc layer quality detection device, characterized by: The invention comprises a fixing frame (1), a bending mechanism (4) and a flattening mechanism (5) arranged in the fixing frame (1); the bending mechanism (4) comprises a horizontally arranged bending base plate (402) and a bending head (401) suspended above the bending base plate (402); a bending groove (403) corresponding to the bending head (401) is provided on the bending base plate (402); the flattening mechanism (5) comprises a horizontally arranged flattening base plate (502) and a flattening top plate (501) suspended above the flattening base plate (502); the distance between the lower end of the bending head (401) and the bottom of the bending groove (403) is the same as the distance between the flattening top plate (501) and the flattening base plate (502); and the bending head (401) and the flattening top plate (501) are both connected to a power mechanism (3) for driving them to move up and down.

2. The galvanized steel strip zinc layer quality detection device according to claim 1, characterized in that: The power mechanism (3) is a hydraulic cylinder, an electric cylinder or a pneumatic cylinder having a telescopic rod (302). The cylinder body (301) of the power mechanism (3) is arranged on the top of the fixed frame (1). The axis of the telescopic rod (302) of the power mechanism (3) is perpendicular to the plane where the bending bottom plate (402) and the flattening bottom plate (502) are located. The bending head (401) and the flattening top plate (501) are both arranged at the lower end of the telescopic rod (302).

3. The galvanized steel strip zinc layer quality detection device according to claim 2, characterized in that: A long strip connecting plate (2) is fixed to the lower end of the telescopic rod (302), and the bending head (401) and the flattening top plate (501) are both fixed to the connecting plate (2) and arranged at intervals along the length direction of the connecting plate (2).

4. The galvanized steel strip zinc layer quality detection device according to claim 1, characterized in that: The fixing frame (1) comprises a mounting base plate (103), a mounting top plate (101), and a plurality of vertical support columns (102) connected between the mounting base plate (103) and the mounting top plate (101); the bending base plate (402) and the flattening base plate (502) are both fixed on the mounting base plate (103); and the power mechanism (3) is fixed on the mounting top plate (101).

5. The galvanized steel strip zinc layer quality detection device according to claim 4, characterized in that: A plurality of vertical support columns (102) are arranged along the circumference of the mounting base plate (103), grid plates (6) are arranged between adjacent support columns (102), and at least one grid plate (6) is rotatably connected to the fixing frame (1) to form a channel for the galvanized steel strip to enter and exit.

6. The galvanized steel strip zinc layer quality detection device according to claim 1, characterized in that: The bending head (401) comprises a flat section (4011) and a bending section (4012); the cross sections of the bending section (4012) and the bending groove (403) are both V-shaped, and the cross-sectional area of ​​the bending section (4012) is smaller than the cross-sectional area of ​​the bending groove (403).

7. The galvanized steel strip zinc layer quality detection device according to claim 6, characterized in that: The bottom of the bending groove (403) and the lower end surface of the bending section (4012) are both arc-shaped.

8. The galvanized steel strip zinc layer quality detection device according to claim 1, characterized in that: An ejection assembly (404) is embedded in the bottom of the bending groove (403), and the ejection assembly (404) includes a head (4041) and a spring (4042) arranged at the lower end of the head (4041). When the spring (4042) is compressed, the upper end surface of the head (4041) is not higher than the bottom of the bending groove (403); when the spring (4042) is reset, the upper end surface of the head (4041) is higher than the bottom of the bending groove (403).

9. The galvanized steel strip zinc layer quality detection device according to claim 8, characterized in that: The ejection components (404) are multiple and are spaced apart along the length direction of the bending groove (403). The bottom of the bending groove (403) is provided with multiple accommodating grooves (405) spaced apart along the length direction thereof. The number of the accommodating grooves (405) is the same as that of the ejection components (404). The lower end of the spring (4042) of the ejection component (404) is fixed to the bottom of the accommodating groove (405), and the upper end is fixed to the lower end of the ejector head (4041). The depth of the accommodating groove (405) is greater than the length of the spring (4042) in the reset state.

10. The galvanized steel strip zinc layer quality detection device according to claim 1, characterized in that: The upper end surface of the plug (4041) is an arc surface with the same arc as the bottom of the bending groove (403).

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