PH adjusting device for preparing steel oxide layer pickling solution

Abstract

The utility model discloses a PH adjusting device for preparing a steel oxide layer pickling solution, and relates to the technical field of steel oxide layer pickling solution preparation, the PH adjusting device comprises a preparation extraction conveying pipe and a steel oxide layer pickling solution preparation box, the preparation extraction conveying pipe is installed and connected on the front end position of the steel oxide layer pickling solution preparation box, and the steel oxide layer pickling solution preparation box is connected with the steel oxide layer pickling solution preparation box. A configuration conveying pump is arranged at the lower end of the configuration extraction conveying pipe, an acid liquor storage box is arranged at the left end of the steel oxide layer pickling solution configuration box, and an acid liquor conveying mechanism is arranged at the position, located on the steel oxide layer pickling solution configuration box, of the upper end of the acid liquor storage box; and an acid liquor uniform dispersion pipe is arranged at the outer end of the acid liquor conveying mechanism and is positioned in the steel oxide layer pickling liquor preparation box. Liquid diffused by the acid liquor uniform dispersion pipe and the alkali liquor uniform dispersion pipe can be stirred and dispersed through the electric stirring mechanism between the acid liquor uniform dispersion pipe and the alkali liquor uniform dispersion pipe, so that the steel oxide layer pickling solution is more efficiently dispersed and prepared.

Description

Technical Field

[0001] The utility model relates to the technical field of steel oxide layer pickling solution configuration, in particular to a PH regulating device for steel oxide layer pickling solution configuration. Background Art

[0002] Pickling of steel oxide layer is a method of using acid solution to remove scale and rust on the surface of steel. It is a method of cleaning the metal surface. Generally, the workpiece is immersed in an aqueous solution of sulfuric acid to remove oxides and other films on the metal surface. When the steel oxide layer pickling solution is configured, in order to ensure the overall pH value, a pH regulating device is required for the configuration of the steel oxide layer pickling solution.

[0003] The existing Chinese patent CN206793648U disclosed a pH value regulating device on December 26, 2017, characterized in that it includes a vertical reactor, a pH electrode, an alkaline solution storage tank, an alkaline pump, an alkaline solution pipe, a controller and an electromagnetic valve; the vertical reactor is provided with a stirring paddle, and its lid is provided with a feed port and a plurality of small circular openings; the pH electrode is placed in the vertical reactor through the small circular opening, and its depth is above the blade of the stirring paddle. The alkaline pump is placed in the alkaline solution storage tank; the diameter of the alkaline solution pipe is the same as that of the circular opening of the reactor, one end of which is connected to the alkaline pump, and the other end of which is inserted into the vertical reactor through the small circular opening of the reactor lid; the controller contains a data receiving, analyzing and controlling system; the electromagnetic valve is installed on the alkaline solution pipe; the controller, pH electrode and alkaline pump are connected through a circuit.

[0004] However, when the above device is used to transport alkali or acid for pH adjustment, the overall alkali or acid is not evenly dispersed due to the lack of a rapid dispersing and neutralizing structure during dispersion and neutralization, resulting in a problem of inefficient configuration. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a PH regulating device for the configuration of steel oxide layer pickling liquid. The liquid diffused by the acid solution uniform dispersion tube and the alkali solution uniform dispersion tube can be stirred and dispersed through an electric stirring mechanism therebetween, so that the dispersed configuration of the steel oxide layer pickling liquid is more efficient.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A PH regulating device for steel oxide layer pickling solution configuration, comprising a configuration extraction and delivery pipe and a steel oxide layer pickling solution configuration box, wherein the configuration extraction and delivery pipe is installed and connected to the front end position of the steel oxide layer pickling solution configuration box, the lower end of the configuration extraction and delivery pipe is provided with a configuration delivery pump, the left end of the steel oxide layer pickling solution configuration box is provided with an acid storage box, the upper end of the acid storage box is located on the steel oxide layer pickling solution configuration box, an acid delivery mechanism is provided, the outer end of the acid delivery mechanism is located in the steel oxide layer pickling solution configuration box, an acid uniform dispersion pipe is provided inside, the right end of the steel oxide layer pickling solution configuration box is provided with an alkali storage box, the upper end of the alkali storage box is located on the steel oxide layer pickling solution configuration box, an alkali delivery mechanism is provided, and the outer end of the alkali delivery mechanism is located in the steel oxide layer acid An alkali liquid uniform dispersion pipe is arranged on the washing liquid configuration box, and an electric stirring mechanism is arranged on the steel oxide layer pickling liquid configuration box between the acid liquid uniform dispersion pipe and the alkali liquid uniform dispersion pipe. The configuration delivery pump, alkali liquid delivery mechanism, acid liquid delivery mechanism and electric stirring mechanism are electrically connected to the external controller through a connecting line. The acid liquid uniform dispersion pipe includes a delivery transverse pipe, a hollow panel, a liquid separation side pipe, a liquid separation pipe head, a liquid separation main pipe and a stirring sleeve cavity. A hollow panel is arranged on the lower side of the outer end of the delivery transverse pipe, a liquid separation main pipe is arranged on the lower end of the hollow panel, a liquid separation side pipe is arranged on the outer end of the liquid separation main pipe, a liquid separation pipe head is arranged on the outer side of the liquid separation side pipe, and a stirring sleeve cavity is arranged between the liquid separation side pipes. The hollow panel is connected to the steel oxide layer pickling liquid configuration box, and the delivery transverse pipe is connected to the acid liquid delivery mechanism.

[0008] Through the above technical scheme: the steel oxide layer pickling liquid configuration box senses the pH value of the internal liquid and transmits the information to the external controller. When adjustment is required, the external controller can control the acid delivery mechanism and the alkali delivery mechanism to extract equal amounts of liquid. The liquid delivered by the acid delivery mechanism and the alkali delivery mechanism can be evenly diffused into the steel oxide layer pickling liquid configuration box through the acid uniform dispersion pipe and the alkali uniform dispersion pipe. The liquid diffused by the acid uniform dispersion pipe and the alkali uniform dispersion pipe can be stirred and dispersed through the electric stirring mechanism therebetween, so that the dispersed configuration of the steel oxide layer pickling liquid is more efficient. The acid configured in the steel oxide layer pickling liquid configuration box can be transported to the configured delivery pump through the configured extraction and delivery pipe, and then can be transported to the outside.

[0009] The utility model is further configured as follows: the electric stirring mechanism includes a dispersion round rod, a bottom main rod, a coupling and a rotating motor, the output end of the rotating motor is provided with a coupling, the lower end of the coupling is provided with a bottom main rod, the peripheral side of the bottom main rod is provided with a dispersion round rod, and the rotating motor is connected to the steel oxide layer pickling liquid configuration box by screws.

[0010] Through the above technical solution: due to the electric stirring mechanism structure, it is convenient to rotate, stir, disperse and mix.

[0011] The utility model is further configured that the alkali solution conveying mechanism includes a liquid metering pump and an infusion tube, the outer end of the liquid metering pump is provided with an infusion tube, the liquid metering pump is connected to the steel oxide layer pickling liquid configuration box, and the infusion tube is connected to the alkali solution storage box.

[0012] Through the above technical solution: due to the structure of the alkali solution conveying mechanism, it is convenient to extract, convey and use.

[0013] The utility model is further configured that the lower end of the electric stirring mechanism is sleeved between the lower ends of the acid solution uniform dispersion tube and the alkali solution uniform dispersion tube.

[0014] Through the above technical solution: because the lower end of the electric stirring mechanism is sleeved between the lower ends of the acid solution uniform dispersion tube and the alkali solution uniform dispersion tube, stirring and mixing are convenient for use.

[0015] The utility model is further configured that PH electrodes are arranged on both sides of the front end of the steel oxide layer pickling liquid configuration box.

[0016] Through the above technical solution: because the front ends of the steel oxide layer pickling liquid configuration box are provided with PH electrodes on both sides, it can be used by induction.

[0017] The utility model is further configured that the steel oxide layer pickling liquid configuration box is rectangular, and the interior of the steel oxide layer pickling liquid configuration box is hollow.

[0018] Through the above technical solution: because the steel oxide layer pickling liquid configuration box is rectangular, and the interior of the steel oxide layer pickling liquid configuration box is hollow, it is convenient to store liquid for configuration and use.

[0019] The utility model is further configured that the acid solution uniform dispersion tube and the alkali solution uniform dispersion tube have the same structure and are in a symmetrical state.

[0020] Through the above technical solution: because the acid solution uniform dispersion tube and the alkali solution uniform dispersion tube have the same structure and are symmetrical, they are convenient for uniform dispersion and use.

[0021] The beneficial effects of the utility model are:

[0022] 1. By providing an electric stirring mechanism structure, the liquid diffused by the acid uniform dispersion tube and the alkali uniform dispersion tube can be stirred and dispersed. The rotating motor of the electric stirring mechanism is connected to the steel oxide layer pickling liquid configuration box by screws, so that the rotating motor is easy to install and place. When the output end of the rotating motor rotates, the rotating motor can drive the coupling to rotate, the coupling can drive the bottom main rod to rotate, and the bottom main rod can drive the dispersion round rod to rotate, which is convenient for rotation, stirring and mixing.

[0023] 2. By providing an acid liquid uniform dispersion pipe structure, it can be uniformly dispersed for use. The delivery cross pipe of the acid liquid uniform dispersion pipe is connected to the acid liquid delivery mechanism by screws, so that the acid liquid delivery mechanism can transport the acidic substance to the hollow panel at the lower end of the delivery cross pipe, and then it can be transported to the liquid separation main pipe through the hollow panel. The liquid in the liquid separation main pipe can be dispersed through the liquid separation pipe head on the side of the liquid separation side pipe. The liquid separation side pipe is located in the upper, middle and lower parts, so that the dispersion is more efficient. Because of the area of ​​the stirring sleeve cavity, the lower end of the electric stirring mechanism can rotate through, so that the liquid in the stirring sleeve cavity area can be effectively dispersed for mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional structural schematic diagram of a PH regulating device for steel oxide layer pickling liquid provided by the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of an acid liquid uniform dispersion pipe of a PH regulating device for pickling liquid for iron and steel oxide layer provided by the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of an electric stirring mechanism of a PH regulating device for a pickling solution for an oxide layer of steel proposed in the utility model;

[0027] Figure 4 The utility model discloses a schematic diagram of the structure of an alkali solution conveying mechanism of a PH regulating device for pickling solution of an oxide layer of steel.

[0028] In the figure: 1. Acid storage box; 2. Delivery pump; 3. Extraction and delivery pipe; 4. Alkali storage box; 5. Alkali delivery mechanism; 51. Liquid metering pump; 52. Infusion pipe; 6. Alkali uniform dispersion pipe; 7. Electric stirring mechanism; 71. Dispersion round rod; 72. Bottom main rod; 73. Coupling; 74. Rotating motor; 8. Acid uniform dispersion pipe; 81. Delivery cross pipe; 82. Hollow panel; 83. Liquid separation side pipe; 84. Liquid separation pipe head; 85. Liquid separation main pipe; 86. Stirring sleeve cavity; 9. Acid delivery mechanism; 10. Steel oxide layer pickling liquid configuration box. DETAILED DESCRIPTION

[0029] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0032] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0033] Reference Figure 1-Figure 4A PH regulating device for steel oxide layer pickling solution configuration, comprising a configuration extraction and delivery pipe 3 and a steel oxide layer pickling solution configuration box 10, wherein the configuration extraction and delivery pipe 3 is installed and connected to the front end position of the steel oxide layer pickling solution configuration box 10, and a configuration delivery pump 2 is arranged at the lower end of the configuration extraction and delivery pipe 3, and an acid storage box 1 is arranged at the left end of the steel oxide layer pickling solution configuration box 10, and the upper end of the acid storage box 1 is located on the steel oxide layer pickling solution configuration box 10 and is provided with an acid delivery mechanism 9, The outer end of the liquid conveying mechanism 9 is located in the steel oxide layer pickling liquid configuration box 10, and an acid liquid uniform dispersion pipe 8 is arranged inside. The right end of the steel oxide layer pickling liquid configuration box 10 is provided with an alkali liquid storage box 4. The upper end of the alkali liquid storage box 4 is located on the steel oxide layer pickling liquid configuration box 10 and an alkali liquid conveying mechanism 5 is arranged. The outer end of the alkali liquid conveying mechanism 5 is located on the steel oxide layer pickling liquid configuration box 10 and an alkali liquid uniform dispersion pipe 6 is arranged. The steel oxide layer pickling liquid configuration box 10 is provided with an alkali liquid uniform dispersion pipe 6. The steel oxide layer pickling liquid configuration box 10 is provided with an alkali liquid uniform dispersion pipe 6. The pickling liquid configuration box 10 is provided with an electric stirring mechanism 7, and the configuration delivery pump 2, the alkali solution delivery mechanism 5, the acid solution delivery mechanism 9 and the electric stirring mechanism 7 are electrically connected to the external controller through a connecting line. When in use, the steel oxide layer pickling liquid configuration box 10 senses the pH value of the internal liquid and transmits the information to the external controller. When adjustment is required, the external controller can control the acid solution delivery mechanism 9 and the alkali solution delivery mechanism 5 to extract equal amounts of liquid. The liquid delivered by the acid solution delivery mechanism 9 and the alkali solution delivery mechanism 5 can be evenly diffused into the steel oxide layer pickling liquid configuration box 10 through the acid solution uniform dispersion pipe 8 and the alkali solution uniform dispersion pipe 6. The liquid diffused by the acid solution uniform dispersion pipe 8 and the alkali solution uniform dispersion pipe 6 can be stirred and dispersed through the electric stirring mechanism 7 therebetween, so that the steel oxide layer pickling liquid is more efficiently dispersed. The acid configured in the steel oxide layer pickling liquid configuration box 10 can be delivered to the configuration delivery pump 2 through the configuration extraction delivery pipe 3, and then can be delivered to the outside.

[0034] Specifically, the acid liquid uniformly dispersing pipe 8 includes a conveying transverse pipe 81, a hollow panel 82, a liquid separation side pipe 83, a liquid separation pipe head 84, a liquid separation main pipe 85 and a stirring sleeve cavity 86. The hollow panel 82 is arranged at the lower side of the outer end of the conveying transverse pipe 81, the lower end of the hollow panel 82 is arranged with a liquid separation main pipe 85, the outer end of the liquid separation main pipe 85 is arranged with a liquid separation side pipe 83, the outer side of the liquid separation side pipe 83 is arranged with a liquid separation pipe head 84, and a stirring sleeve cavity 86 is arranged between the liquid separation side pipes 83. The hollow panel 82 is connected to the steel oxide layer pickling liquid configuration box 10, the conveying transverse pipe 81 is connected to the acid liquid conveying mechanism 9, and the acid liquid is uniformly distributed. The delivery transverse pipe 81 of the dispersion pipe 8 is connected to the acid delivery mechanism 9 by screws, so that the acid delivery mechanism 9 can deliver the acidic substance to the hollow panel 82 at the lower end of the delivery transverse pipe 81, and then it can be delivered to the liquid separation main pipe 85 through the hollow panel 82. The liquid in the liquid separation main pipe 85 can be dispersed through the liquid separation pipe head 84 on the side of the liquid separation side pipe 83. The liquid separation side pipe 83 is located in the upper, middle and lower parts, so that the dispersion is more efficient. Due to the area of ​​the stirring sleeve cavity 86, the lower end of the electric stirring mechanism 7 can rotate through, so that the liquid in the area of ​​the stirring sleeve cavity 86 can be effectively dispersed for mixing.

[0035] Specifically, the electric stirring mechanism 7 includes a dispersion rod 71, a bottom main rod 72, a coupling 73 and a rotating motor 74. The output end of the rotating motor 74 is provided with a coupling 73, the lower end of the coupling 73 is provided with a bottom main rod 72, and the circumferential side of the bottom main rod 72 is provided with a dispersion rod 71. The rotating motor 74 is connected to the steel oxide layer pickling solution configuration box 10 by screws. The rotating motor 74 of the electric stirring mechanism 7 is connected to the steel oxide layer pickling solution configuration box 10 by screws, so that the rotating motor 74 is easy to install and place. When the output end of the rotating motor 74 rotates, the rotating motor 74 can drive the coupling 73 to rotate, the coupling 73 can drive the bottom main rod 72 to rotate, and the bottom main rod 72 can drive the dispersion rod 71 to rotate, which is convenient for rotation, stirring and mixing.

[0036] Specifically, the alkali solution conveying mechanism 5 includes a liquid metering pump 51 and an infusion tube 52. The outer end of the liquid metering pump 51 is provided with the infusion tube 52. The liquid metering pump 51 is connected to the steel oxide layer pickling solution configuration box 10. The infusion tube 52 is connected to the alkali solution storage box 4. The liquid metering pump 51 of the alkali solution conveying mechanism 5 is connected to the steel oxide layer pickling solution configuration box 10 by screws, so that it can be placed stably. The liquid metering pump 51 can extract the liquid inside the alkali solution storage box 4 through the infusion tube 52 for configuration and transportation.

[0037] Specifically, the lower end of the electric stirring mechanism 7 is sleeved between the lower ends of the acid solution uniform dispersion tube 8 and the alkali solution uniform dispersion tube 6, so as to facilitate stirring and mixing.

[0038] Specifically, pH electrodes are provided on both sides of the front end of the steel oxide layer pickling liquid configuration box 10 so that it can be used by induction.

[0039] Specifically, the steel oxide layer pickling liquid configuration box 10 is rectangular, and the interior of the steel oxide layer pickling liquid configuration box 10 is hollow, so as to facilitate the storage of liquid for configuration and use.

[0040] Specifically, the acid solution uniform dispersion tube 8 and the alkali solution uniform dispersion tube 6 have the same structure and are symmetrical, so as to facilitate uniform dispersion and use.

[0041] Working principle: When in use, the steel oxide layer pickling liquid configuration box 10 senses the pH value of the internal liquid and transmits the information to the external controller. When adjustment is required, the external controller can control the acid delivery mechanism 9 and the alkali delivery mechanism 5 to extract equal amounts of liquid. The liquid delivered by the acid delivery mechanism 9 and the alkali delivery mechanism 5 can be evenly diffused into the steel oxide layer pickling liquid configuration box 10 through the acid uniform dispersion pipe 8 and the alkali uniform dispersion pipe 6. The liquid diffused by the acid uniform dispersion pipe 8 and the alkali uniform dispersion pipe 6 can be stirred and dispersed through the electric stirring mechanism 7 therebetween, making the dispersed configuration of the steel oxide layer pickling liquid more efficient. The acid configured in the steel oxide layer pickling liquid configuration box 10 can be transported to the configuration delivery pump 2 through the configuration extraction and delivery pipe 3, and then can be transported to the outside.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pH regulating device for preparing a pickling solution for an oxide layer of steel, comprising an extraction and delivery pipe (3) and a pickling solution preparation box (10) for preparing an oxide layer of steel, characterized in that: The configuration extraction and delivery pipe (3) is installed and connected to the front end of the steel oxide layer pickling liquid configuration box (10); the configuration delivery pump (2) is arranged at the lower end of the configuration extraction and delivery pipe (3); the acid storage box (1) is arranged at the left end of the steel oxide layer pickling liquid configuration box (10); the upper end of the acid storage box (1) is located at the steel oxide layer pickling liquid configuration box (10); an acid delivery mechanism (9) is arranged on the steel oxide layer pickling liquid configuration box (10); the outer end of the acid delivery mechanism (9) is located at the steel oxide layer pickling liquid configuration box (10); An acid liquid uniform dispersion pipe (8) is arranged inside the storage box (10); an alkali liquid storage box (4) is arranged at the right end of the steel oxide layer pickling liquid configuration box (10); an alkali liquid conveying mechanism (5) is arranged on the upper end of the alkali liquid storage box (4) located on the steel oxide layer pickling liquid configuration box (10); an alkali liquid uniform dispersion pipe (6) is arranged on the outer end of the alkali liquid conveying mechanism (5) located on the steel oxide layer pickling liquid configuration box (10); and a alkali liquid uniform dispersion pipe (8) and an alkali liquid uniform dispersion pipe (6) are arranged between the acid liquid uniform dispersion pipe (8) and the alkali liquid uniform dispersion pipe (6). An electric stirring mechanism (7) is arranged on a steel oxide layer pickling liquid configuration box (10); the configuration delivery pump (2), the alkali liquid delivery mechanism (5), the acid liquid delivery mechanism (9) and the electric stirring mechanism (7) are electrically connected to an external controller via a connecting line; the acid liquid uniform dispersion pipe (8) comprises a delivery transverse pipe (81), a hollow panel (82), a liquid separation side pipe (83), a liquid separation pipe head (84), a liquid separation main pipe (85) and a stirring sleeve cavity (86); the outer surface of the delivery transverse pipe (81) A hollow panel (82) is provided at the lower end, a liquid separation main pipe (85) is provided at the lower end of the hollow panel (82), a liquid separation side pipe (83) is provided at the outer end of the liquid separation main pipe (85), a liquid separation pipe head (84) is provided on the outer side of the liquid separation side pipe (83), a stirring sleeve cavity (86) is provided between the liquid separation side pipes (83), the hollow panel (82) is connected to the steel oxide layer pickling liquid configuration box (10), and the delivery cross pipe (81) is connected to the acid delivery mechanism (9).

2. A PH regulating device for preparing pickling liquid for iron and steel oxide layer according to claim 1, characterized in that: The electric stirring mechanism (7) comprises a dispersion round rod (71), a bottom main rod (72), a coupling (73) and a rotating motor (74); the output end of the rotating motor (74) is provided with a coupling (73); the lower end of the coupling (73) is provided with a bottom main rod (72); the peripheral side of the bottom main rod (72) is provided with a dispersion round rod (71); and the rotating motor (74) is connected to a steel oxide layer pickling liquid configuration box (10) by screws.

3. The pH regulating device for preparing the pickling liquid for the iron and steel oxide layer according to claim 1, characterized in that: The alkali solution conveying mechanism (5) comprises a liquid metering pump (51) and a liquid infusion tube (52). The outer end of the liquid metering pump (51) is provided with a liquid infusion tube (52). The liquid metering pump (51) is connected to a steel oxide layer pickling solution configuration box (10), and the liquid infusion tube (52) is connected to an alkali solution storage box (4).

4. The PH regulating device for preparing the pickling liquid of the iron and steel oxide layer according to claim 1, characterized in that: The lower end of the electric stirring mechanism (7) is sleeved between the lower ends of the acid solution uniform dispersion tube (8) and the alkali solution uniform dispersion tube (6).

5. The pH regulating device for preparing the pickling liquid for the iron and steel oxide layer according to claim 1, characterized in that: PH electrodes are arranged on both sides of the front end of the steel oxide layer pickling liquid configuration box (10).

6. The PH regulating device for preparing the pickling liquid of the iron and steel oxide layer according to claim 1, characterized in that: The steel oxide layer pickling liquid configuration box (10) is rectangular, and the interior of the steel oxide layer pickling liquid configuration box (10) is in a hollow state.

7. The pH regulating device for preparing the pickling liquid for the iron and steel oxide layer according to claim 1, characterized in that: The acid solution uniform dispersion tube (8) and the alkali solution uniform dispersion tube (6) have the same structure and are symmetrical.

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