Strip steel pickling bath and strip steel continuous pickling machine

Abstract

The utility model discloses a strip steel pickling bath and a strip steel continuous pickling machine, which comprise a pickling bath body and a plurality of spray pipes used for forming acid liquor jet flow, the pickling bath body is a concave square bath body, the plurality of spray pipes are distributed at the bath bottom of the pickling bath body in an array mode, strip steel is arranged above the pickling bath body in a suspended mode, and the spray pipes are arranged on the pickling bath body. The array-distributed acid liquid jet sprayed upwards from the spray pipe to the bottom surface of the strip steel is used for pickling the bottom surface of the strip steel and supporting the suspended strip steel, so that the acid liquid is more uniformly distributed on the surface of the strip steel, the pickling effect of the surface of the strip steel is ensured, and meanwhile, the strip steel is prevented from colliding with the bottom of the pickling tank body; in this way, a supporting stone used in the prior art can be omitted, so that adverse effects of broken stones formed by abrasion of the supporting stone on all parts of the strip steel continuous pickling machine are avoided, the production efficiency is improved, and the maintenance and operation cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of strip steel pickling equipment, in particular to a strip steel pickling tank and a strip steel continuous pickling machine. Background Art

[0002] The raw material of cold-rolled strip steel is hot-rolled strip steel. After the strip steel is rolled at high temperature, there will be a layer of hard and brittle secondary iron oxide scale on the surface of the strip steel. Therefore, it is necessary to go through the pickling process to remove the iron oxide scale on the surface of the strip steel.

[0003] In the existing strip pickling tank, during the pickling process, acid is usually sprayed out from the side of the strip. Due to the uneven distribution of acid, local iron oxide scale may not be removed by pickling or local over-pickling may occur, resulting in poor pickling effect on the strip surface.

[0004] In addition, the existing strip pickling tank is provided with a support stone to prevent the strip from wearing the bottom of the pickling tank. Since the strip wears the support stone in the pickling tank severely, the crushed stones produced by the wear of the support stone flow into the various components of the pickling system with the acid, which can easily cause damage to the various components of the pickling system, such as nozzle blockage, etc., thereby affecting the smooth progress of the pickling production. Moreover, the support stone is expensive. If the support stone is replaced frequently, the maintenance and operation costs are high. Utility Model Content

[0005] To this end, in order to solve the above-mentioned problems, the utility model provides a strip pickling tank and a strip continuous pickling machine, which not only ensure the pickling effect of the strip, but also can eliminate the support stone, thereby avoiding the adverse effects of crushed stones formed by the wear of the support stone on the various components of the strip continuous pickling machine, and also reducing maintenance and operation costs.

[0006] To achieve the above purpose, the technical solution provided by the utility model is as follows:

[0007] The utility model provides a strip steel pickling tank, comprising a pickling tank body and also comprising a plurality of nozzles for forming acid liquid jets; the pickling tank body is an inwardly concave square tank body, and the plurality of nozzles are arranged in an array at the bottom of the pickling tank body; the strip steel is suspended above the pickling tank body, and the array-distributed acid liquid jets sprayed upward from the nozzles to the bottom surface of the strip steel are used for pickling the bottom surface of the strip steel and forming support for the suspended strip steel.

[0008] Furthermore, a mounting groove for accommodating the nozzle is provided at the bottom of the pickling tank body, the nozzle is inserted into the mounting groove, and the upper edge of the nozzle is lower than the notch of the mounting groove.

[0009] Furthermore, 3 to 7 rows of nozzles are arranged along the length direction of the pickling tank.

[0010] Furthermore, each row is provided with a plurality of nozzles arranged along the width direction of the pickling tank and arranged at intervals.

[0011] Furthermore, squeezing rollers for removing moisture from the strip are respectively arranged on both sides of the pickling tank body, and correspond one-to-one to the inlet and outlet of the pickling tank body.

[0012] The utility model also provides a strip steel continuous pickling machine, which at least comprises the strip steel pickling tank mentioned above.

[0013] The technical solution provided by the utility model has the following beneficial effects:

[0014] Multiple nozzles distributed in an array simultaneously spray corresponding acid jets toward the strip located above, so that the acid is more evenly distributed on the surface of the strip, thereby ensuring the pickling effect of the strip surface, and at the same time supporting the strip to prevent the strip from rubbing against the bottom of the pickling tank. In this way, the support stone used in the prior art can be eliminated, thereby avoiding the adverse effects of crushed stones formed by the wear of the support stone on various components of the strip continuous pickling machine, thereby improving production efficiency and reducing maintenance and operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a cross-sectional view of a steel strip pickling tank in Example 1;

[0016] Figure 2 Shown is a top view of the strip steel pickling tank in Example 1. DETAILED DESCRIPTION

[0017] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0018] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0019] Embodiment 1

[0020] Reference Figure 1 and Figure 2As shown, embodiment 1 provides a strip steel pickling tank (hereinafter referred to as the pickling tank), the pickling tank includes a pickling tank body 1, and also includes a plurality of nozzles 4 for forming acid liquid jets, the pickling tank body 1 is a concave square tank body, and the plurality of nozzles 4 are arranged in an array at the bottom 12 of the pickling tank body 1, and the strip steel 3 is suspended above the pickling tank body 1, and the array-distributed acid liquid jets sprayed upward from the nozzles 4 to the bottom surface of the strip steel 3 are used for pickling the bottom surface of the strip steel 3 and forming support for the suspended strip steel 3.

[0021] In this embodiment, Figure 2 The bottom 12 of the pickling tank 1 shown is provided with a mounting groove 11 for accommodating the nozzle 4. The nozzle 4 is inserted into the mounting groove 11, and the upper edge of the nozzle 4 is lower than the groove opening of the mounting groove 11. If the spray flow of the nozzle 4 is abnormal, the supporting force suddenly decreases, causing the strip steel 3 to sag and rest against the bottom 12 of the pickling tank 1, and be supported by the bottom 12 of the pickling tank 1. In this way, direct contact between the strip steel 3 and the nozzle 4 can be prevented, thereby avoiding certain damage to the nozzle 4.

[0022] Squeezing rollers 2 for removing moisture from the steel strip 3 are respectively arranged on both sides of the pickling tank body 1 , and correspond one to one to the inlet and outlet of the pickling tank body 1 .

[0023] During specific implementation, the steel strip 3 first passes through the squeezing roller 2 located on the left side of the pickling tank body 1, and then enters the pickling tank body 1 from the inlet on the left side of the pickling tank body 1. Multiple acid jets distributed in an array are ejected from the nozzle 4 in the mounting groove 11 in the bottom 12 of the pickling tank body 1, and sprayed to the bottom surface of the steel strip 3 for pickling. At the same time, the steel strip 3 is supported by the impact force of the acid jet to support the suspended part of the steel strip 3 until the steel strip 3 leaves the discharge port on the right side of the pickling tank body 1 after pickling, and then passes through the squeezing roller 2 located on the right side of the pickling tank to remove moisture.

[0024] Multiple array-distributed nozzles 4 simultaneously spray corresponding acid jets toward the strip steel 3 located above, so as to achieve a more uniform distribution of the acid on the surface of the strip steel 3, thereby ensuring the pickling effect on the surface of the strip steel 3, and at the same time supporting the strip steel 3 to prevent the strip steel 3 from rubbing against the bottom of the pickling tank 1. In this way, the support stone used in the prior art can be eliminated, thereby avoiding the adverse effects of crushed stones formed by the wear of the support stone on various components of the continuous pickling machine for the strip steel 3, thereby improving production efficiency and reducing maintenance and operating costs.

[0025] In another preferred embodiment, four rows of nozzles 4 are arranged along the length direction of the pickling tank 1, and the length direction is as follows: Figure 1 left and right directions shown.

[0026] More specifically, each row is provided with five nozzles 4 arranged along the width direction of the pickling tank 1 and arranged at intervals.

[0027] In this specific embodiment, four rows of nozzles 4 are distributed at intervals and installed in the installation grooves 11 of the corresponding pickling tank body 1 along the left and right directions to form a 4×5 array of nozzles 4 or acid jets to ensure that when the strip steel 3 passes over the pickling tank body 1, the multiple supports formed by 20 acid jets are sufficient to ensure that the strip steel 3 will not sag or fall, so as to avoid the strip steel 3 from rubbing or hitting the bottom 12 of the pickling tank body 1.

[0028] Of course, in other embodiments, 3 rows, 5 rows, 6 rows or 7 rows of nozzles 4 may be arranged along the length direction of the pickling tank 1 .

[0029] In addition, the number of nozzles 4 in each row is not limited thereto, and the specific number of nozzles 4 in each row is determined according to the width direction and structure of the pickling tank body 1 .

[0030] Embodiment 2

[0031] Embodiment 2 provides a continuous steel strip pickling machine, which at least includes the steel strip pickling tank of embodiment 1.

[0032] Multiple array-distributed nozzles simultaneously spray corresponding acid jets toward the strip located above, so that the acid is more evenly distributed on the surface of the strip, thereby ensuring the pickling effect of the strip surface, and at the same time supporting the strip to prevent the strip from rubbing against the bottom of the pickling tank. In this way, the support stone used in the prior art can be eliminated, thereby avoiding the adverse effects of crushed stones formed by the wear of the support stone on various components of the continuous pickling machine for strip steel, thereby improving production efficiency and reducing the maintenance and operation costs of the continuous pickling machine for strip steel.

[0033] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A strip steel pickling tank, comprising a pickling tank body, characterized in that: Also included are a plurality of nozzles for forming acid jets; The pickling tank body is an inwardly concave square tank body, and a plurality of nozzles are arranged in an array at the bottom of the pickling tank body; The steel strip is suspended above the pickling tank, and the array-distributed acid liquid jets sprayed upward from the nozzle to the bottom surface of the steel strip are used for pickling the bottom surface of the steel strip and forming support for the suspended steel strip.

2. The strip steel pickling tank according to claim 1, characterized in that: The bottom of the pickling tank body is provided with a mounting groove for accommodating the nozzle, the nozzle is inserted in the mounting groove, and the upper edge of the nozzle is lower than the notch of the mounting groove.

3. The strip steel pickling tank according to claim 1 or 2, characterized in that: 3 to 7 rows of spray pipes are arranged along the length direction of the pickling tank.

4. The strip steel pickling tank according to claim 3, characterized in that: Each row is provided with a plurality of spray pipes which are arranged along the width direction of the pickling tank and are arranged at intervals.

5. The strip steel pickling tank according to claim 1 or 2, characterized in that: Squeezing rollers for removing moisture from the strip are respectively arranged on both sides of the pickling tank body, and correspond one to one to the inlet and outlet of the pickling tank body.

6. A continuous pickling machine for strip steel, characterized in that: At least comprises the strip pickling tank described in any one of claims 1-5.

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