Strip steel pickling system

Abstract

The invention discloses a strip steel pickling system. The technical problem that in a pickling system in the prior art, independent upgrading of a pickling or rinsing process is complex is solved. The invention provides a strip steel pickling system which comprises a pickling unit, a rinsing unit and a connecting mechanism, and the pickling unit comprises a pickling tank body and a pickling outlet; the rinsing unit comprises a rinsing tank body made of a material different from that of the pickling tank body and a rinsing inlet; the connecting mechanism comprises a first connecting piece connected with the pickling tank body, a second connecting piece connected with the rinsing tank body and a connecting pipe communicated with the first connecting piece and the second connecting piece. The pickling tank body and the rinsing tank body are designed in a split mode, and the pickling tank body and the rinsing tank body are made of different materials. The pickling tank body and the rinsing tank body are communicated through the connecting mechanism, the pickling tank body or the rinsing tank body can be independently replaced, the pickling unit or the rinsing unit can be independently upgraded, and the pickling unit and the rinsing unit do not need to be integrally replaced, so that the construction cost is reduced, and later maintenance is facilitated.

Description

Technical Field

[0001] The present application belongs to the technical field of steel rolling, and specifically relates to a strip steel pickling system. Background Art

[0002] The pickling stage in the strip rolling process usually uses hydrochloric acid as the medium to remove the iron oxide scale on the surface of the strip. After pickling, the strip enters the rinsing stage. The purpose of this stage is to clean the acid remaining on the surface of the strip with desalted water and condensed water to prevent oxidation and corrosion. The pickling and rinsing stages are key steps in the strip rolling process and directly affect the surface quality and subsequent processing performance of the strip.

[0003] In the prior art, the pickling tank and the rinsing tank are usually designed as an integrated whole. If the pickling stage or the rinsing stage needs to be modified separately, the pickling tank and the rinsing tank need to be replaced as a whole, which has a high construction cost and is not conducive to later maintenance. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a strip pickling system, comprising:

[0005] A pickling unit, comprising a pickling tank body and a pickling outlet provided on the pickling tank body;

[0006] A rinsing unit, comprising a rinsing tank body made of a material different from that of the pickling tank body and a rinsing inlet provided in the rinsing tank body;

[0007] The connecting mechanism includes a first connecting piece located at the pickling outlet and connected to the pickling tank body, a second connecting piece located at the rinsing inlet and connected to the rinsing tank body, and a connecting pipe connected to both the first connecting piece and the second connecting piece.

[0008] In some embodiments, the pickling tank body is made of steel lined with rubber or steel lined with rubber and brick, and the rinsing tank body is made of PP or PPH.

[0009] In some embodiments, the pickling tank body is detachably connected to the first connecting member, and the rinsing tank body is detachably connected to the second connecting member;

[0010] The size of the first connecting member is greater than that of the second connecting member.

[0011] In some embodiments, the pickling tank body includes a first tank body and a second tank body connected to each other;

[0012] The pickling unit also includes an acid return hole, a pickling squeeze roller and a pickling outlet arranged on the second tank body.

[0013] In some embodiments, the second tank body further comprises an outlet connecting section coaxially arranged with the pickling outlet;

[0014] The rinsing tank body also includes an inlet connecting section coaxially arranged with the pickling inlet;

[0015] The outlet connecting section, the inlet connecting section and the connecting pipe are coaxially arranged.

[0016] In some embodiments, the connecting pipe is a telescopic hose, and an inner diameter of the connecting pipe is larger than an inner diameter of the acid washing outlet and / or the rinsing inlet.

[0017] In some embodiments, the length direction of the rinsing tank is parallel to the moving direction of the strip steel, and the total length of the rinsing tank body is 9 to 10 m; the rinsing tank includes at least a first-level rinsing zone and a second-level rinsing zone, and the length of the first-level rinsing zone is greater than the length of the second-level rinsing zone.

[0018] In some embodiments, the first-stage rinsing zone includes two groups of first spray beams, each of which is provided with a plurality of first nozzles; the second-stage rinsing zone includes a group of second spray beams, each of which is provided with a plurality of second nozzles; the spray angle of the second nozzle is greater than the spray angle of the first nozzle, and the number of the second nozzles is less than the number of the first nozzles.

[0019] In some embodiments, the first-stage rinsing zone further includes two groups of deviation correction detection devices extending along the height direction of the rinsing tank and along the width direction of the rinsing tank, and a detection channel for the strip to pass is formed between the two groups of deviation correction detection devices.

[0020] In some embodiments, the pickling unit further comprises a pickling water seal groove provided in the pickling tank body, and the pickling water seal groove is located above the pickling outlet;

[0021] The rinsing unit further comprises a rinsing water seal groove arranged in the rinsing groove body, and the rinsing water seal groove is located above the pickling outlet.

[0022] It can be seen from the above technical scheme that the present application provides a strip pickling system, including a pickling unit, a rinsing unit and a connecting mechanism, wherein the pickling unit includes a pickling tank body and a pickling outlet provided at the pickling tank body; the rinsing unit includes a rinsing tank body made of a material different from that of the pickling tank body and a rinsing inlet provided at the rinsing tank body; the connecting mechanism includes a first connecting piece located at the pickling outlet and connected to the pickling tank body, a second connecting piece located at the rinsing inlet and connected to the rinsing tank body, and a connecting pipe connected to both the first connecting piece and the second connecting piece. The pickling tank body and the rinsing tank body of the present application adopt a split design, and the pickling tank body and the rinsing tank body are made of different materials. The pickling tank body and the rinsing tank body are connected through a connecting mechanism, thereby realizing the pickling process and the rinsing process. The present application can replace the pickling tank body or the rinsing tank body separately, and can upgrade the pickling unit or the rinsing unit separately, without the need to replace the pickling unit and the rinsing unit as a whole, thereby reducing the construction cost and facilitating later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the strip steel pickling system in the embodiment of the present application.

[0024] Figure 2 for Figure 1 Schematic diagram of the structure of the pickling unit.

[0025] Figure 3 for Figure 1 Schematic diagram of the structure of the rinsing unit.

[0026] Figure 4 for Figure 1 Schematic diagram of the structure of the connecting mechanism.

[0027] Figure 5 for Figure 1 Schematic diagram of the overall structure of the rinsing unit.

[0028] Description of reference numerals: 100-strip pickling system, 110-pickling unit, 111-pickling tank, 1111-first tank, 1112-second tank, 112-pickling outlet, 113-return acid hole, 114-pickling squeeze roller, 115-outlet connecting section, 116-pickling water seal tank; 120-rinsing unit, 121-rinsing tank, 1211-first rinsing area, 12111-first spray beam, 12112-second spray beam, 12113-return acid hole, 1211-second spray beam ... hole, 1211-second pickling outlet, 1211-second pickling hole, 1111-second pickling squeeze roller, 1111-second spray beam, 1111-second spray 212-second stage rinsing zone, 12121-second spray beam, 1213-third stage rinsing zone, 1214-fourth stage rinsing zone, 1215-fifth stage rinsing zone, 122-rinsing inlet, 123-inlet connecting section, 124-rinsing water washing tank, 125-rinsing squeeze roller, 126-deviation correction detection device, 130-connecting mechanism, 131-first connecting piece, 132-second connecting piece, 133-connecting pipe. DETAILED DESCRIPTION

[0029] In order to enable technicians in the technical field to which the present application belongs to understand the present application more clearly, the technical solution of the present application is described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0030] In the embodiments of the present application, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a strip pickling system 100 includes a pickling unit 110, a rinsing unit 120 and a connecting mechanism 130, wherein the pickling unit 110 includes a pickling tank body 111 and a pickling outlet 112 arranged on the pickling tank body 111; the rinsing unit 120 includes a rinsing tank body 121 made of a material different from that of the pickling tank body 111 and a rinsing inlet 122 arranged on the rinsing tank body 121; the connecting mechanism 130 includes a first connecting piece 131 located at the pickling outlet 112 and connected to the pickling tank body 111, a second connecting piece 132 located at the rinsing inlet 122 and connected to the rinsing tank body 121, and a connecting pipe 133 connected to both the first connecting piece 131 and the second connecting piece 132.

[0031] The rinsing tank body 121 is made of a different material from the pickling tank body 111, that is, the pickling tank body 111 and the rinsing tank body 121 are designed to be split. The rinsing unit 120 and the pickling unit 110 are two relatively independent units. Therefore, the pickling unit 110 or the rinsing unit 120 can be selectively modified. If only the pickling unit 110 is modified, the pickling tank body 111 and the internal structure can be directly upgraded, and then connected to the rinsing unit 120; if only the rinsing unit 120 is modified, the rinsing tank body 121 and the internal structure can be directly upgraded, and then connected to the pickling unit 110; if the pickling unit 110 and the rinsing unit 120 are modified at the same time, the pickling unit 110 and the rinsing unit 120 can be upgraded respectively, and then the pickling unit 110 and the rinsing unit 120 can be connected. In some embodiments, the present application modifies the rinsing unit 120.

[0032] In some embodiments, the existing pickling unit 110 and the rinsing unit 120 are mostly made of steel, so the material of the tank body that needs to be upgraded can be PP material. For example, when the rinsing unit 120 needs to be upgraded, the pickling tank body 111 can continue to be made of steel, and the rinsing tank body 121 can be made of PP material. Compared with steel, PP material is easy to process and has a lower processing cost. Since the rinsing tank body 121 and the pickling tank body 111 are made of different materials, the pickling tank body 111 and the rinsing tank body 121 cannot be designed as one body. The pickling tank body 111 and the rinsing tank body 121 of different materials are connected by a connecting mechanism 130, thereby realizing the pickling process and the rinsing process.

[0033] In order to ensure that the pickling tank body 111 is connected with the rinsing tank body 121, the pickling outlet 112 and the rinsing inlet 122 are connected through the connecting mechanism 130. A first connecting part is provided at the pickling tank body 111 located at the pickling outlet 112. The first connecting part can be welded to the pickling tank body 111 and connected to the first connecting piece 131. A second connecting part is provided at the rinsing tank body 121 located at the rinsing inlet 122. The second connecting part can be designed as a whole with the rinsing tank body 121 and connected to the second connecting piece 132. In some embodiments, the first connecting piece 131 and the second connecting piece 132 can both be flanges, and the connecting pipe between the first connecting piece 131 and the second connecting piece 132 connects the pickling tank body 111 with the rinsing tank body 121.

[0034] Therefore, the pickling tank 111 and the rinsing tank 121 of the present application adopt a split design, and the pickling tank 111 and the rinsing tank 121 are made of different materials. The pickling tank 111 and the rinsing tank 121 are connected through the connecting mechanism 130, thereby realizing the pickling process and the rinsing process. The present application can replace the pickling tank 111 or the rinsing tank 121 separately, and can upgrade the pickling unit 110 or the rinsing unit 120 separately, without the need to replace the pickling unit 110 and the rinsing unit 120 as a whole, thereby reducing construction costs and facilitating later maintenance.

[0035] In some embodiments, the pickling tank body 111 is made of steel-lined rubber or steel-lined rubber-lined brick material, and the rinsing tank body 121 is made of PP or PPH material. In some embodiments, the present application upgrades and transforms the rinsing unit 120. In order to shorten the construction period and reduce maintenance costs and time, the rinsing tank adopts PP or PPH material. Polypropylene (PP) is a common thermoplastic polymer, and PPH material, that is, a modified version of polypropylene homopolymer (Polypropylene Homopolymer), is a high-performance engineering plastic. The steel-lined rubber material of the pickling tank usually refers to a layer of rubber lining inside the pickling tank of the steel structure. This design can provide good corrosion resistance. The steel-lined rubber-lined brick material usually has an external steel structure such as a steel plate as a base, and a layer of rubber such as natural rubber, butyl rubber or chloroprene rubber is lined inside. In some cases, bricks such as acid-resistant bricks are also lined on the rubber layer to provide additional protection. The steel-lined rubber-lined brick material is a composite anti-corrosion material that combines the strength of steel, the corrosion resistance and wear resistance of rubber, and the additional protective properties of bricks.

[0036] Therefore, due to limited space and short construction period, in the process of upgrading the rinsing unit 120 , the new rinsing tank body 121 is made of PP or PPH material, and the rinsing tank body 121 is connected to the pickling tank body through the connecting mechanism 130 .

[0037] like Figure 2As shown, in some embodiments, the pickling tank body 111 includes a first tank body 1111 and a second tank body 1112 connected to each other; since the distance between the original pickling tank body and the original rinsing tank body is short, and the area of ​​the original pickling tank body 111 and the original rinsing tank body 121 is also provided with pickling squeeze rollers 114 and other equipment, if cutting is performed at the rear of the pickling squeeze roller 114 of the original pickling tank body, there are many parts in the cutting part, which is inconvenient to cut, so the pickling tank body is divided into two parts, that is, cutting is performed near the spray beam, which is more convenient, and then the second tank body 1112 is remade. In some embodiments, the first tank body 1111 and the second tank body 1112 are made of the same material, and can be both made of steel, and the first tank body 1111 and the second tank body 1112 can be connected by welding.

[0038] like Figure 2 As shown, in some embodiments, the pickling unit 110 also includes an acid return hole 113, a pickling squeeze roller 114 and a pickling outlet 112 provided on the second tank body 1112. The acid return hole 113, the pickling squeeze roller 114 and other components provided on the second tank body 1112 correspond to the components corresponding to the original pickling tank body 111. The acid return hole 113 of the pickling tank is mainly used to continuously recycle the acid solution in the pickling tank through the pumping system in the pickling equipment to achieve the pickling effect on the metal surface. The acid return hole 113 is in the same position as the acid return hole 113 of the original pickling tank, and does not affect the function of the original pickling tank. The pickling squeeze roller 114 can reduce the loss of acid liquid brought out when the strip is pulled out, save acid liquid, and reduce production costs. The squeeze roller is in the same position as the original pickling tank, and does not affect the function of the original pickling tank. When the steel strip passes between the pickling and squeezing rollers 114, the pickling liquid attached to the surface of the steel strip can be removed by squeezing, thereby reducing the residual acid liquid on the surface of the steel strip.

[0039] like Figure 2 As shown, in some embodiments, the second tank body 1112 further includes an outlet connection section 115; the outlet connection section 115 is coaxially arranged with the pickling outlet 112; the rinsing tank body 121 further includes an inlet connection section 123, and the inlet connection section 123 is coaxially arranged with the pickling inlet; the outlet connection section 115, the inlet connection section 123 and the connecting pipe 133 are coaxially arranged. That is, after the pickling tank body 111 is connected with the rinsing tank body 121, it is ensured that the strip steel passes smoothly along the axial direction.

[0040] Therefore, by designing the outlet connecting section 115 in the pickling tank body 111 and setting the inlet connecting section 123 in the rinsing tank body 121, the outlet connecting section 115 and the inlet connecting section 123 are connected through the connecting mechanism 130, so as to ensure the smooth progress of the pickling process and the rinsing process, and facilitate the subsequent maintenance.

[0041] like Figure 4As shown, since the expansion coefficients of the pickling tank 111 and the rinsing tank 121 are quite different, the connection mechanism 130 needs to have strong elasticity. In some embodiments, the connection pipe 133 is a retractable hose, and the inner diameter of the connection pipe 133 is larger than the inner diameter of the pickling outlet 112 and / or the rinsing inlet 122. The inner diameter of the opening of the connection pipe 133 is slightly larger than the inner diameter of the pickling outlet 112 and / or the rinsing inlet 122 to prevent the strip from scratching the connection pipe 133. In some embodiments, the material of the connection pipe 133 can be PP material. PP material (polypropylene) has good corrosion resistance. When the strip passes through the connection pipe 133, the strip may carry acid medium. The connection pipe 133 is made of PP material, which can have corrosion resistance.

[0042] like Figure 1 and Figure 4 As shown, in some embodiments, the first connecting member 131 includes a first connecting plate and a first connecting port provided on the first connecting plate and connected to the connecting pipe 133, and the first connecting plate is provided with a first connecting hole connected to the pickling tank body 111; the first connecting plate can be a flange. The second connecting member 132 includes a second connecting plate and a second connecting port provided on the second connecting plate and connected to the connecting pipe 133, and the second connecting plate is provided with a plurality of second connecting holes connected to the rinsing tank body 121, and the second connecting plate can be a flange.

[0043] like Figure 1 and Figure 4 As shown, in other embodiments, a first connecting portion is provided at the pickling tank body 111 located at the pickling outlet 112, the first connecting portion can be welded to the outlet connecting section 115, and the first connecting portion is connected to the first connecting piece 131, and a second connecting portion is provided at the rinsing tank body 121 located at the rinsing inlet 122, the second connecting portion can be integrally designed with the inlet connecting section 123, and the second connecting portion is connected to the second connecting piece 132.

[0044] like Figure 1 and Figure 4 As shown, in some embodiments, the opening of the first connector 131 is equal in size to the pickling outlet 112; the opening of the second connector 132 is equal in size to the rinsing inlet 122. Since the outlet connection section 115 is a steel-lined rubber-lined brick structure, the wall thickness of the outlet connection section 115 is relatively thick; the material of the inlet connection section 123 is PP material or PPH material, and the wall thickness of the inlet connection section 123 is relatively thin. Therefore, the overall size of the first connection part is greater than the overall size of the second connection part, and at this time, the size of the first connector 131 is greater than the size of the second connector 132, so that the strip steel can pass through the same space at the pickling outlet 112 and the rinsing inlet 122.

[0045] like Figure 1 and Figure 4As shown, in some embodiments, the pickling tank body 111 is detachably connected to the first connecting member 131, and the rinsing tank body 121 is detachably connected to the second connecting member 132. The pickling tank body 111 is connected to the rinsing tank body 121 through a connecting mechanism 130, wherein the first connecting member 131 and the pickling tank body 111 are connected by bolts, and a rubber gasket seal can be set in the middle. The second connecting member 132 and the rinsing tank body 121 are connected by bolts, and a rubber gasket seal can be set in the middle. Since the connecting mechanism 130 is a consumable part, the pickling tank body 111 is detachably connected to the first connecting member 131, and the rinsing tank body 121 is detachably connected to the second connecting member 132, which is convenient for quick replacement.

[0046] like Figure 3 and Figure 5 As shown, in some embodiments, the length direction of the rinsing tank is parallel to the moving direction of the strip steel, and the total length of the rinsing tank body 121 is 9 to 10 meters; the total length of the rinsing tank body 121 can be 9 meters, 9.2 meters, 9.5 meters, 9.8 meters or 10 meters. The total length of the existing rinsing tank body 121 is about 20 to 25 meters. In this application, the total length of the rinsing tank body 121 is 9 to 10 meters. After the rinsing unit 120 is upgraded, the size of the rinsing tank body 121 is shorter, which is equivalent to reserving a certain space for other equipment of the rinsing unit 120, that is, 10 meters to 16 meters of space can be reserved along the moving direction of the strip steel. For example: install a heavy brushing machine to improve the rinsing process of the rinsing unit 120.

[0047] like Figure 3 and Figure 5 As shown, in other embodiments, the rinsing tank includes at least a first-stage rinsing area 1211 and a second-stage rinsing area 1212, and the length of the first-stage rinsing area 1211 is greater than the length of the second-stage rinsing area 1212. The length of the first-stage rinsing area 1211 is greater than the length of the second-stage rinsing area 1212, that is, the distance behind the rinsing and squeezing roller 125 is increased. After the strip is fed into the first-stage rinsing area 1211 by the rinsing and squeezing roller 125, if there is deviation, it can be corrected by the correction device set on the rinsing and squeezing roller 125. By increasing the distance of the space behind the rinsing and squeezing roller 125, it is ensured that there is enough space for the strip to adjust and correct. The 4a correction effect of the correction device on the rinsing and squeezing roller 125 can be guaranteed. Prevent the problem of insufficient 4a correction ability after shortening the rinsing tank body 121. Therefore, in order to ensure the deviation correction effect, the rinsing and squeezing roller 125 should be designed to maintain a certain distance from the front end of the rinsing and squeezing roller 125 and / or the strip contact roller at the rear end of the rinsing and squeezing roller 125. In order to ensure the compactness of the overall structure of the new rinsing unit 120, the length of the first rinsing zone is lengthened, thereby ensuring the 4a deviation correction effect of the deviation correction device on the rinsing and squeezing roller 125.

[0048] like Figure 3 and Figure 5As shown, in some embodiments, the first-stage rinsing zone 1211 includes two groups of first spray beams 12111, each group is provided with two spray beams, and the first spray beam 12111 is provided with a plurality of first nozzles; the second-stage rinsing zone 1212 includes a group of second spray beams 12121, each group is provided with two spray beams, and the second spray beam 12121 is provided with a plurality of second nozzles; the spray angle of the second nozzle is greater than the spray angle of the first nozzle, and the number of the second nozzles is less than the number of the first nozzles. In some embodiments, the number of first nozzles on each first spray beam 12111 in the first-stage rinsing zone 1211 is about 12 to 15, and the spray angle of the first nozzle is 60° to 65°, and the spray angle of the first nozzle can be 60°, 62° or 65°; the number of second nozzles on each second spray beam 12121 in the second-stage rinsing zone 1212 is about 10 to 11, and the spray angle of the second nozzle is 70° to 75°; wherein the spray angle of the second nozzle can be 70°, 72°, 74° or 75°. Since the length of the first-stage rinsing zone 1211 is longer than that of the second-stage rinsing zone 1212, and because the flow rate of the pump is constant, the number of first spray beams 12111 in the first-stage rinsing zone 1211 is two groups, and the number of second spray beams 12121 in the second-stage rinsing zone 1212 is one group, so the spray angle of the first spray group is greater than the spray angle of the first nozzle.

[0049] like Figure 5 As shown, in some embodiments, the rinsing tank includes a first-level rinsing zone 1211, a second-level rinsing zone 1212, a third-level rinsing zone 1213, a fourth-level rinsing zone 1214 and a fifth-level rinsing zone 1215, wherein the lengths of the second-level rinsing zone 1212, the third-level rinsing zone 1213, the fourth-level rinsing zone 1214 and the fifth-level rinsing zone 1215 can be equal, and the structures of the second-level rinsing zone 1212, the third-level rinsing zone 1213, the fourth-level rinsing zone 1214 and the fifth-level rinsing zone 1215 can also be the same, and the length of the first-level rinsing zone 1211 is greater than that of the second-level rinsing zone 1212, thereby ensuring the 4a correction effect of the correction device on the extrusion roller.

[0050] Therefore, the second nozzle in the second-stage rinsing area 1212 is replaced with a large flow nozzle, which can reduce the clogging problem compared with the small flow nozzle. Although the overall length of the rinsing tank 121 is reduced and the number of spray beams is correspondingly small, the rinsing quality can be met by using fewer spray beams and larger nozzles.

[0051] like Figure 5As shown, in some embodiments, the first-stage rinsing area 1211 further includes two sets of deviation correction detection devices 126 extending along the height direction and the width direction of the rinsing tank, and a detection channel for the strip to pass through is formed between the two sets of deviation correction detection devices 126. When the strip passes through the squeeze rollers of the pickling tank body and then the squeeze rollers of the rinsing tank, there may be a phenomenon of deviation from the original track, so the deviation correction detection device 126 is set in the first-stage rinsing area 1211. When the strip passes through the detection channel, the two sets of deviation correction detection devices 126 can detect whether the strip deviates from the original track. Therefore, the deviation correction of the strip can be driven by controlling the deviation correction device of the squeeze roller.

[0052] like Figure 2 As shown, in some embodiments, the pickling unit 110 further includes a pickling water seal groove 116 disposed in the pickling tank body, and the pickling water seal groove 116 is located above the pickling outlet 112; the pickling water seal groove 116 is disposed along the periphery of the pickling tank body, and the side wall of the pickling tank body, the first bottom plate and the first side plate together form the pickling water seal groove 116. Clean water is injected into the pickling water seal groove 116, and the clean water in the pickling water seal groove 116 completely seals the inside of the pickling tank body from the outside, which can effectively prevent the acid liquid inside the pickling tank body from volatilizing due to heat and diffusing outward, thereby avoiding the acid liquid from polluting the external environment; each pickling tank body is covered with an acid tank cover.

[0053] like Figure 3 As shown, in other embodiments, the rinsing unit 120 further includes a rinsing water seal groove provided in the rinsing tank body, and the rinsing water seal groove is located above the pickling outlet 112. The rinsing water seal groove is located above the primary spray, and the pickling water seal groove 116 is a groove. In some embodiments, the pickling water seal groove 116 is formed by the first side wall, the second side wall and the side plate of the pickling tank body. Clean water is injected into the rinsing tank body, and the clean water in the rinsing tank body completely seals the inside of the rinsing tank body from the outside, which can effectively prevent the acid liquid inside the rinsing tank body from volatilizing due to heat and diffusing outward, thereby avoiding the acid liquid from polluting the external environment; each rinsing tank body is covered with a rinsing tank cover.

[0054] Therefore, the pickling water seal groove 116 of the pickling tank body 111 and the rinsing water seal groove of the rinsing tank body 121 are designed independently, that is, the pickling water seal groove 116 is not connected to the rinsing water seal groove.

[0055] The connection method of the pickling system in this application includes the following steps:

[0056] The second tank body 1112 with the acid return hole 113, the pickling squeeze roller 114 and the pickling outlet 112 is welded to the first tank body 1111 to form a pickling unit 110 made of steel-lined rubber or steel-lined rubber-lined bricks;

[0057] The first tank body 1111 may be a part of the original pickling unit 110, that is, the pickling tank body 111 may be cut on the side close to the spray beam to separate the original pickling tank body 111 and the original rinsing tank body 121 made of the same material as the pickling tank body 111, and then the original rinsing tank body 121 may be removed;

[0058] Since the distance between the original pickling tank 111 and the original rinsing tank 121 is shorter, and the area near the original pickling tank 111 and the original rinsing tank 121 is also provided with squeezing rollers and other equipment, if cutting is performed at the rear of the squeezing roller of the original pickling tank 111, there are many parts in the cutting area and it is inconvenient to cut. Therefore, cutting is performed before the spray beam, which is more convenient. Then the second tank 1112 is remade, and the pickling squeezing roller 114 and other parts provided on the second tank 1112 correspond to the parts corresponding to the original pickling tank 111.

[0059] Connect the second tank body 1112 to the first connecting member 131;

[0060] The rinsing tank body 121 of the rinsing unit 120 made of PP material or PPH material is connected to the second connecting piece 132 so that the pickling tank body 111 is connected to the rinsing tank body 121, thereby forming a new pickling system.

[0061] Through the above embodiments, the present application has the following beneficial effects or advantages:

[0062] 1) The pickling tank 111 and the rinsing tank 121 of the present application adopt a split design, and the pickling tank 111 and the rinsing tank 121 are made of different materials. The pickling tank 111 and the rinsing tank 121 are connected through a connecting mechanism 130, thereby realizing the pickling process and the rinsing process. The present application can replace the pickling tank 111 or the rinsing tank 121 separately, and can upgrade the pickling unit 110 or the rinsing unit 120 separately, without the need to replace the pickling unit 110 and the rinsing unit 120 as a whole, thereby reducing construction costs and facilitating later maintenance.

[0063] 2) After upgrading and transforming the rinsing process alone, the present application has achieved ideal results in terms of quality, energy consumption and equipment stability. The pickling tank body 111 of the steel-lined rubber-lined bricks and the PPH rinsing tank body 121 are connected by a connecting mechanism 130, and the connection has good sealing performance and will not cause leakage.

[0064] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0065] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0066] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0067] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0068] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A strip steel pickling system, characterized in that: include: A pickling unit, comprising a pickling tank body and a pickling outlet provided on the pickling tank body; A rinsing unit, comprising a rinsing tank body made of a material different from that of the pickling tank body and a rinsing inlet provided in the rinsing tank body; The connecting mechanism includes a first connecting piece located at the pickling outlet and connected to the pickling tank body, a second connecting piece located at the rinsing inlet and connected to the rinsing tank body, and a connecting pipe connected to both the first connecting piece and the second connecting piece.

2. The strip pickling system according to claim 1, characterized in that: The pickling tank body is made of steel-lined rubber or steel-lined rubber-lined brick material, and the rinsing tank body is made of PP material or PPH material.

3. The strip pickling system according to claim 2, characterized in that: The pickling tank body is detachably connected to the first connecting piece, and the rinsing tank body is detachably connected to the second connecting piece; The size of the first connecting member is greater than that of the second connecting member.

4. The strip steel pickling system according to any one of claims 1 to 3, characterized in that: The pickling tank body comprises a first tank body and a second tank body connected to each other; The pickling unit also includes an acid return hole, a pickling squeeze roller and a pickling outlet arranged on the second tank body.

5. The strip steel pickling system according to claim 4, characterized in that: The second tank body also includes an outlet connecting section coaxially arranged with the pickling outlet; The rinsing tank body also includes an inlet connecting section coaxially arranged with the pickling inlet; The outlet connecting section, the inlet connecting section and the connecting pipe are coaxially arranged.

6. The strip steel pickling system according to any one of claims 1 to 3, characterized in that: The connecting pipe is a telescopic hose, and the inner diameter of the connecting pipe is larger than the inner diameter of the pickling outlet and / or the rinsing inlet.

7. The strip steel pickling system according to any one of claims 1 to 3, characterized in that: The length direction of the rinsing tank is parallel to the moving direction of the strip steel, and the total length of the rinsing tank body is 9 to 10 m; the rinsing tank includes at least a first-level rinsing zone and a second-level rinsing zone, and the length of the first-level rinsing zone is greater than the length of the second-level rinsing zone.

8. The strip steel pickling system according to claim 7, characterized in that: The first-stage rinsing zone includes two groups of first spray beams, each of which is provided with a plurality of first nozzles; the second-stage rinsing zone includes a group of second spray beams, each of which is provided with a plurality of second nozzles; the spray angle of the second nozzle is greater than the spray angle of the first nozzle, and the number of the second nozzles is less than the number of the first nozzles.

9. The strip steel pickling system according to claim 7, characterized in that: The first-stage rinsing zone further comprises two groups of deviation correction detection devices extending along the height direction of the rinsing tank and along the width direction of the rinsing tank, and a detection channel for the strip to pass is formed between the two groups of deviation correction detection devices.

10. The strip steel pickling system according to any one of claims 1 to 3, characterized in that: The pickling unit further comprises a pickling water seal groove provided in the pickling tank body, wherein the pickling water seal groove is located above the pickling outlet; The rinsing unit further comprises a rinsing water seal groove arranged in the rinsing groove body, and the rinsing water seal groove is located above the pickling outlet.

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