Automatic metering and acid adding device

Abstract

The utility model discloses an automatic metering acid adding device which comprises an acid liquor storage tank and an acid pickling box which is arranged at the lower end of the acid liquor storage tank and used for spraying and washing steel belt conveying, an acid liquor pump for pumping out and conveying acid liquor is connected to the acid liquor storage tank, and the output end of the acid liquor pump is connected with a filter box. Through combined use of an acid liquor storage tank, an acid liquor pump, a filter tank, a flow valve, a liquor storage tank and a PLC (Programmable Logic Controller) in control connection, acid liquor used by a steel belt is pumped out by the acid liquor pump and conveyed to the upper end of the filter tank, and flows downwards in a staggered manner from top to bottom, and the recycled acid liquor can flow in a staggered manner through an impurity filter plate in the filter tank, so that the acid liquor is recycled. According to the acid liquor recycling device, the effect of filtering and removing steel belt acid pickling impurities existing in recycled acid liquor can be achieved, the phenomenon that the impurities block a pipeline in the acid liquor output process is avoided, the impurity filter plate can be pulled out for impurity cleaning and reusing in the later period due to the pull-out design of the impurity filter plate, and meanwhile the amount of the acid liquor injected into the storage cavity is not affected.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel strip processing equipment, and in particular relates to an automatic metering acid adding device. Background Art

[0002] Steel pickling means that the steel strip should have a clean and active surface to ensure the surface quality of the produced steel. In order to obtain such a surface and remove the iron oxide scale on the surface, an acid solution is needed to react chemically with the iron oxide scale to remove the oxide on the surface of the steel strip and restore the original metallic luster of the steel strip. However, the steel strip pickling equipment currently used often only performs the pickling step. The acidic liquid remaining on the steel strip needs to be wiped off by other equipment. This may cause the steel strip after pickling to be corroded by the residual acidic liquid during the replacement of the equipment to clean the steel strip.

[0003] To this end, a strip steel pickling device with announcement number "CN213866431U" includes a supporting base, a pickling room, a water washing room, a drying room, a conveying device and a body; a water tank is installed on the upper surface of the supporting base body, a plurality of high-pressure water guns are installed on the upper surface of the inner body, and a plurality of high-pressure water guns are also installed on the lower surface of the inner body, a second support plate is installed on the peripheral surface of the body, a second water pump is installed on the upper surface of the second support plate, and the high-pressure water gun is connected to the water tank through a second water pipe and a second water pump; the drying room includes a wiping block, the wiping block includes an upper wiping block and a lower wiping block, both of which are installed on the inner peripheral surface of the body, and a water absorbing layer is provided on the surface of the upper wiping block and the lower wiping block, and the steel strip is rinsed by arranging a high-pressure water gun to completely remove the pickling liquid remaining on the steel strip after pickling, and the water stains on the steel strip after water washing can be removed by arranging the wiping block.

[0004] However, for the above-mentioned strip pickling device, although the first water pump is installed on the upper surface of the first support plate, the nozzle is connected to the acid liquid tank through the first water pipe and the first water pump, and the nozzles are arranged up and down so that the steel strip can be completely rinsed with the pickling liquid to achieve the purpose of sufficient pickling, the following obvious defects still exist during use: the above-mentioned acid liquid tank is directly connected to the pump body and connected to the nozzle for pickling the steel strip, and the acid liquid tank is not provided with a component for removing impurities from the recovered output acid liquid, which can easily cause impurities and foreign matter in the acid liquid after the steel strip is cleaned to cause pipeline blockage, thereby resulting in a reduction in the output flow of the acid liquid. Utility Model Content

[0005] The purpose of the utility model is to provide an automatic metering acid adding device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic metering acid-adding device, comprising an acid storage tank, and a pickling box at the lower end of the acid storage tank for spraying steel strip conveying, the acid storage tank is connected to an acid pump for extracting and conveying acid, the output end of the acid pump is connected to a filter box for filtering impurities present in the acid, the output end of the filter box is connected to a liquid storage tank installed inside the pickling box through a flow valve, the bottom of the liquid storage tank is connected to an acid spray plate vertically and symmetrically installed on one side of the pickling box through a pipeline, the lower end of the acid spray plate is horizontally provided with an acid filter plate for filtering impurities in the acid after pickling of the steel strip, and the upper end of the pickling box is provided with a liquid extraction pump connected to the bottom of one side of the rear of the pickling box through a pipeline and extracting and recovering the acid after use.

[0007] Preferably, the two sides of the filter box are staggered with impurity filter plates, and the impurity filter plates are staggeredly installed inside the filter box by pulling and pulling, and the output end of the filter box is connected to the input port of the flow valve by penetration, which is used to measure and control the output flow of the acid liquid, and the output end of the flow valve is connected to a pipeline that is penetrated and connected to the liquid storage tank, so as to detect the flow value of the output acid liquid through the flow valve, and at the same time set the injection amount of the acid liquid output by the acid pump to the storage chamber, and use the impurity filter plate to filter the used acid liquid for papermaking.

[0008] Preferably, the internal cavity of the liquid storage tank forms a storage cavity through a partition, and a high-pressure liquid pump is installed in the cavity at the lower end of the partition, and the high-pressure liquid pump is connected to one end of the acid spray plate through a pipeline, so that the sprayed acid can have a certain impact force, so as to better carry out pickling operations on the steel strip being transported.

[0009] Preferably, a high-pressure spray head is evenly provided on one side corresponding to the acid spray plate, which is used to pickle both sides of the steel strip input into the pickling box. Support conveying rollers are provided on both sides of the acid spray plate and on both side walls inside the pickling box to realize the pickling of the steel strip and conveyance by using the support conveying rollers.

[0010] Preferably, the output end of the liquid suction pump is connected to an input hose, the other end of the input hose is connected to the acid storage tank, and a control valve is installed on the input hose to achieve controlled recovery of the inflow of recovered acid.

[0011] Preferably, a flow warning light is connected to the upper end of the flow valve for warning that the acid output has reached a preset flow value, and a PLC controller for controlling the equipment is provided outside the pickling box. The PLC control system can be used to control the set amount of acid, and the acid pump can be controlled to automatically stop when the set value is reached, thereby realizing the automatic acid addition function.

[0012] Compared with the prior art, the technical effects and advantages of the utility model are as follows: the automatic metering acid adding device, through the combined use of an acid storage tank, an acid pump, a filter box, a flow valve, a liquid storage box and a PLC control connected thereto, allows the acid used by the steel strip to be pumped out by the acid pump and transported to the upper end of the filter box, and allows the acid to flow downward from top to bottom in an alternating manner, and can stagger the flow of the recovered acid through the impurity filter plate inside the filter box, so that the pickling impurities of the steel strip present in the recovered acid can be filtered and removed, and the phenomenon of impurities causing pipeline blockage will not occur in the acid output, and the pull-out design of the impurity filter plate can be used to pull out the impurity filter plate in the later stage to clean the impurities and reuse it, and at the same time will not affect the amount of acid added to the storage chamber.

[0013] The control system of the PLC controller calculates the area of ​​the steel strip to obtain the amount of acid solution added, and the system of the PLC controller gives a control signal to the acid pump to start adding the calculated amount of acid to the storage chamber. The amount of acid added is then obtained through the flow valve and fed back to the control system in the PLC controller, so that the acid pump can be controlled to add a set amount of acid to the storage chamber according to the area of ​​the steel strip, thereby achieving quantitative filling of the acid and reducing the waste of the acid. The used acid is extracted by the liquid pump and transported to the acid storage tank using an input hose, so that the acid in the pickling of the steel strip can be filtered through the impurity filter plate to filter the impurities and then recovered to the acid storage tank for reuse, thereby allowing the acid to be well recycled and reducing the waste of acid. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the filter element of the utility model from the main view;

[0016] Figure 3 This is a schematic diagram of the internal structure of the liquid storage tank of the utility model from the main view;

[0017] Figure 4 It is a schematic diagram of the top view structure of the high-pressure spray plate of the utility model.

[0018] In the figure: 1. Acid storage tank; 2. Pickling box; 3. Acid pump; 4. Filter box; 5. Flow valve; 6. Liquid storage tank; 7. Acid spray plate; 8. Acid filter plate; 9. Liquid extraction pump; 10. Impurity filter plate; 11. PLC controller; 12. Storage chamber; 13. High-pressure liquid pump; 14. High-pressure spray head; 15. Bracket conveying roller; 16. Input hose; 17. Warning light. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-4 The utility model provides a technical solution: an automatic metering acid adding device, comprising an acid storage tank 1, and a pickling box 2 for spraying steel strip conveying at the lower end of the acid storage tank 1, which is used for pickling both sides of the conveyed steel strip, the acid storage tank 1 is connected with an acid pump 3 for extracting and transporting the acid, the acid in the acid storage tank 1 is extracted by the acid pump 3 and added to the storage chamber 12, so as to carry out high-pressure pickling of both sides of the conveyed steel strip, the output end of the acid pump 3 is connected with a filter box 4 for filtering impurities in the acid, the filter box 4 can be used to filter impurities in the recycled acid before it is input into the storage chamber 12, so as to reduce the occurrence of pipeline blockage, the output end of the filter box 4 is connected with a liquid storage tank 6 installed inside the pickling box 2 through a flow valve 5, which is used to transport a set amount of acid to the storage chamber 12 in the liquid storage tank 6 for high pressure pickling. A pressure liquid pump 13 is used, and the bottom of the liquid storage tank 6 is connected to an acid spray plate 7 vertically and symmetrically installed on one side of the inside of the pickling tank 2 through a pipeline, so that the acid can be transported and concentrated inside the acid spray plate 7 and distributed on both sides of the steel strip. The lower end of the acid spray plate 7 is horizontally provided with an acid filter plate 8 for filtering impurities in the acid after pickling of the steel strip, which can reduce the presence of impurities in the recycled acid, so that the acid will not cause impurity friction damage to the steel strip during pickling, and the acid pump 3 is mechanically controlled by the control system in the PLC controller 11 to fill the acid with a preset amount into the storage chamber 12. The upper end of the pickling tank 2 is provided with a pumping pump 9 connected to the bottom of one side behind the pickling tank 2 through a pipeline and extracting and recovering the used acid. The acid from which impurities have been filtered out in advance is recovered by the pumping pump 9 and transported to the acid storage tank 1 for reuse, thereby reducing unnecessary waste of acid.

[0021] The two sides of the filter box 4 are staggered with impurity filter plates 10, which can make the pickling acid flow downward in the process of cleaning and falling the steel strip, and filter out the metal impurities and other sundries by flowing through the impurity filter plates 10. The impurity filter plates 10 are placed inside the pickling box 2, and there is no need to use locking parts to lock and fix them, which is conducive to the later removal of the impurity filter plates 10. The impurity filter plates 10 are staggeredly installed inside the filter box 4 by pulling and pulling, which can completely filter out the plants in the acid solution, and the output end of the filter box 4 is connected to the filter box 4. It is connected to the input port of the flow valve 5 through a pipe for metering and controlling the output flow of the acid liquid, and the output end of the flow valve 5 is connected to a pipeline through a liquid storage tank 6, and a preset amount of acid liquid is added to the storage cavity 12 for use. The internal cavity of the liquid storage tank 6 is formed with a storage cavity 12 by a partition provided, which is used to add a preset amount of acid liquid into the storage cavity 12 for use by the high-pressure liquid pump 13. The high-pressure liquid pump 13 is installed in the cavity at the lower end of the partition, and the high-pressure liquid pump 13 is connected to one end of the acid spray plate 7 through a pipe.

[0022] A high-pressure spray head 14 is evenly arranged on one side corresponding to the acid spray plate 7, which can spray a calculated preset amount of acid onto the steel strip for pickling. The pickled steel strip is rinsed and dried with clean water under high pressure using external equipment, which is used for pickling both sides of the steel strip input into the pickling box 2. A support conveying roller 15 is arranged on both sides of the acid spray plate 7 and on both side walls inside the pickling box 2, which can convey and pickle steel strips of different widths. The output end of the liquid extraction pump 9 is connected to an input hose 16, which can convey the recovered acid to the inside of the acid storage tank 1 for reuse. The other end of the input hose 16 is connected to the acid storage tank 1, and a control valve is installed on the input hose 16 to avoid recycling. Too much acid may cause leakage in the acid storage tank 1. The upper end of the flow valve 5 is connected to a flow warning light 17 for warning that the acid output has reached a preset flow value, which is used to warn the system of the filling amount calculated. A PLC controller 11 for controlling the equipment is provided on the outside of the pickling box 2. The PLC controller contains a control system for automatically controlling the entire equipment, which calculates and controls the acid pump 3 to fill the required amount of acid for pickling the steel strip, and controls the start and stop of the acid pump 3, as well as the calculation, monitoring and feedback of the amount of acid injected into the flow valve 5 to the control system. It is necessary to add a preset amount of acid for pickling the steel strip in the later stage to reduce unnecessary waste.

[0023] Specifically, the use is to first connect the PLC controller 11 to control the entire acid adding device, and the PLC controller 11 is connected to an external computer to control the acid filling amount, and then the control system of the PLC controller 11 calculates the area of ​​the steel strip that needs to be pickled, and calculates the amount of acid added for the pickling of the steel strip. The PLC controller 11 gives a control signal to the acid pump 3, so that the acid pump 3 starts to extract the acid from the acid storage tank 1 and transport it to the inside of the filter box 4. The acid filter plate 8 is used to filter the acid that flows in an interlaced manner, which can filter out impurities and other substances in the acid to avoid the occurrence of pipeline blockage. After the acid is filtered, it is input into the storage chamber 12 in the storage tank 6 through the flow valve 5. In the process of adding acid, the flow valve 5 is used to calculate the amount of acid added to the storage chamber 12. When the actual value of the area passing the steel strip is greater than or equal to the set value, the automatic acid adding step is started, and the actual value of the area passing the steel strip is recalculated using the PLC control system. Then the automatic acid addition amount for pickling of the steel strip is set by the set value. When it is greater than or equal to the set value on the screen, the automatic acid addition is completed, the automatic acid addition program is stopped, and the acid addition in the storage chamber 12 is completed. Then, the high-pressure liquid pump 13 is used to extract the acid solution and transport it to the acid solution spray plate 7. The acid solution is sprayed on both sides of the steel strip in transportation through the high-pressure spray head 14, so as to realize the pickling of the steel strip. After use, the acid solution flows downward through the impurity filter plate 10 to filter the impurities in the acid solution, thereby reducing the presence of impurities in the recovered acid solution. Then, the liquid extraction pump 9 extracts the filtered acid solution and transports it to the acid solution storage tank 1 through the input hose 16 for use, thereby realizing the recovery and reuse of the acid solution and reducing the amount of acid solution used.

[0024] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic metering acid adding device, comprising an acid liquid storage tank (1), and an acid washing box (2) at the lower end of the acid liquid storage tank (1) for spraying and washing the steel strip conveyor, characterized in that: The acid storage tank (1) is connected to an acid pump (3) for extracting and transporting acid. The output end of the acid pump (3) is connected to a filter box (4) for filtering impurities in the acid. The output end of the filter box (4) is connected to a liquid storage box (6) installed inside the pickling box (2) through a flow valve (5). The bottom of the liquid storage box (6) is connected to an acid spray plate (7) vertically and symmetrically installed on one side of the inside of the pickling box (2) through a pipeline. The lower end of the acid spray plate (7) is laterally provided with an acid filter plate (8) for filtering impurities in the acid after pickling of the steel strip. The upper end of the pickling box (2) is provided with a liquid extraction pump (9) connected to the bottom of the rear side of the pickling box (2) through a pipeline and extracting and recovering the used acid.

2. An automatic metering acid adding device according to claim 1, characterized in that: Impurity filter plates (10) are staggeredly penetrated on both sides of the filter box (4), and the impurity filter plates (10) are staggeredly installed inside the filter box (4) by pulling and pulling, and the output end of the filter box (4) is connected to the input port of the flow valve (5) through a penetration, which is used to measure and control the output flow of the acid liquid, and the output end of the flow valve (5) is connected to a pipeline through which it is connected to the liquid storage box (6).

3. An automatic metering acid adding device according to claim 1, characterized in that: The internal cavity of the liquid storage box (6) is formed with a storage cavity (12) by means of a partition, a high-pressure liquid pump (13) is installed in the cavity at the lower end of the partition, and the high-pressure liquid pump (13) is connected to one end of the acid spray plate (7) through a pipeline.

4. An automatic metering acid adding device according to claim 1, characterized in that: A high-pressure spray head (14) is evenly arranged on one side corresponding to the acid spray plate (7) for pickling both sides of the steel strip input into the pickling box (2). Support conveying rollers (15) are arranged on both sides of the acid spray plate (7) and on both side walls located inside the pickling box (2).

5. An automatic metering acid adding device according to claim 1, characterized in that: The output end of the liquid extraction pump (9) is connected to an input hose (16), the other end of the input hose (16) is connected to the acid storage tank (1), and a control valve is installed on the input hose (16).

6. An automatic metering acid adding device according to claim 1, characterized in that: The upper end of the flow valve (5) is connected to a flow warning light (17) for warning when the acid liquid output reaches a preset flow value, and a PLC controller (11) for controlling the equipment is provided outside the pickling box (2).

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