Water tank PH value control system

Abstract

The utility model belongs to the technical field of polyolefin preparation, and particularly relates to a water tank PH value control system which comprises a tank body, an alkali liquor feeding port, an alkali liquor discharging port, an alkali liquor discharging port, an alkali liquor discharging port, an alkali liquor discharging port and a PH sensor, a guide pipe of the alkali adding device is communicated with the alkali liquor feeding opening, and the alkali adding device is electrically connected with the PH sensor; wherein the PH sensor is suitable for detecting the PH value of pelletizing water in the box body and sending PH value data to the alkali adding device, and the alkali adding device is started or stopped to convey alkali liquor to the box body according to the PH value. According to the water tank PH value control system, the PH sensor and the alkali adding device are arranged to automatically convey alkali liquor to the tank body, it can be ensured that the PH of pelletizing water in the tank body is always alkaline, labor cost is saved, and the service life of the template and the service life of the cutter are prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of polyolefin preparation, and particularly relates to a water tank pH value control system. Background Technique

[0002] When plastic powder is processed into plastic particles by an extruder, various additives need to be added. Some additives will produce some acidic components during the high-temperature process of the extruder. During the process of plastic extrusion and pelletizing from the die, acid will enter the pelletizing water, resulting in a decrease in the pH value of the pelletizing water. When the pH value of the pelletizing water is less than 7, the corrosion rate of the die and the cutting knife significantly accelerates.

[0003] In the prior art, the pH value of the pelletizing water in the pelletizing water tank is measured by manual sampling, and then alkali is manually added to the pelletizing water tank to adjust the pH value. However, manual sampling cannot monitor the pH value of the pelletizing water in real time, resulting in untimely adjustment. The pelletizing water may still be acidic during the unmonitored period, and sampling and detection are carried out multiple times a day, consuming a relatively high labor cost.

[0004] Therefore, in order to solve the technical problem of how to keep the pH of the pelletizing water alkaline all the time, it is urgent to provide a water tank pH value control system.

[0005] It should be noted that the above information disclosed in this background technical part is only used to understand the background technology of the concept of this application. Therefore, the above description is not considered as information of the prior art. Content of the Utility Model

[0006] In order to solve the above technical problems, an embodiment of the present disclosure provides a water tank pH value control system, including:

[0007] A box body, which is provided with an alkali liquor inlet, and a pH sensor is arranged inside the box;

[0008] An alkali adding device, its conduit is communicated with the alkali liquor inlet, and the alkali adding device is electrically connected with the pH sensor;

[0009] Wherein, the pH sensor is adapted to detect the pH value of the pelletizing water in the box body, and send the pH value data to the alkali adding device, and the alkali adding device opens or closes the conveyance of alkali liquor to the box body according to the pH value.

[0010] In an optional implementation manner, the alkali adding device includes:

[0011] A storage tank, above which a material suction gun is arranged;

[0012] A metering pump, the inlet end and the outlet end of which are respectively connected with a plurality of pipelines;

[0013] A control module, which is electrically connected to the metering pump and the pH sensor, and is configured to receive the pH value data of the pH sensor and control the metering pump to start or stop delivering the alkaline solution according to the corresponding pH value.

[0014] In an optional embodiment, the inlet end of the metering pump is connected to the suction gun through a hose, the outlet end of the metering pump is connected to a conduit, and the conduit is connected to the alkaline solution inlet of the tank.

[0015] In an optional embodiment, a T-shaped filter is provided at the inlet of the metering pump.

[0016] In an optional embodiment, the metering pump is equipped with a pressure relief valve, and the pressure relief valve is located on the outlet side of the metering pump and is connected to the metering pump through a connecting pipe.

[0017] In an optional embodiment, the storage tank is adapted to store the alkaline solution; a collection pool is provided below the storage tank.

[0018] In an optional embodiment, a liquid level alarm device is provided at the inner bottom of the storage tank. The alarm device is adapted to measure the liquid level of the alkaline solution in the storage tank. When the liquid level of the alkaline solution is too low, the alarm device sends a warning signal to the control room to notify the on-site staff to add the alkaline solution.

[0019] In an optional embodiment, the control module is configured to:

[0020] When the pH value is less than 8.5, control the metering pump to start delivering the alkaline solution to the tank; or

[0021] When the pH value is greater than 9.5, control the metering pump to stop delivering the alkaline solution.

[0022] The beneficial effect of the present utility model is that the pH value control system of the present water tank detects the pH value of the pelletizing water in the tank in real time through the pH sensor and sends the pH value data to the alkali adding device by setting the pH sensor and the alkali adding device. The alkali adding device starts or stops delivering the alkaline solution to the tank according to the pH value, so that the pH of the pelletizing water in the tank always remains alkaline.

[0023] Other features and advantages of the present utility model will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present utility model. The objects and other advantages of the present utility model are realized and obtained by the structures specifically pointed out in the specification, the claims and the drawings.

[0024] To make the above objects, features and advantages of the present utility model more obvious and understandable, preferred embodiments are specifically cited herein and, in conjunction with the accompanying drawings, are described in detail as follows. Description of the Drawings

[0025] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 A three-dimensional view of a water tank pH value control system provided by an embodiment of the present disclosure;

[0027] Figure 2 A structural block diagram of a water tank pH value control system provided by an embodiment of the present disclosure;

[0028] Figure 3 A principle block diagram of a water tank pH value control system provided by an embodiment of the present disclosure.

[0029] In the figure:

[0030] 1. Box body; 2. Caustic liquor inlet; 3. pH sensor; 4. Caustic adding device; 41. Storage tank; 42. Suction gun; 43. Metering pump; 44. T-shaped filter; 45. Pressure relief valve; 5. Pipeline; 6. Collection pool Specific embodiments

[0031] In order to make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions of the present utility model with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0032] In this text, when it is mentioned that the first component is located on the second component, this may mean that the first component can be directly formed on the second component, or a third component can be inserted between the first component and the second component. In addition, in the drawings, in order to effectively describe the technical content, the thickness of the components can be exaggerated or reduced.

[0033] In this document, when an element or layer is referred to as being "on," "joined to," "connected to," "attached to," or "coupled to" another element or layer, it can be directly on, joined, connected, attached, or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly joined to," "directly connected to," "directly attached to," or "directly coupled to" another element or layer, there may be no intervening elements or layers. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0034] In this document, example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, a statement such as "at least one of..." modifies the entire list of elements when it follows a list of elements, rather than modifying individual elements in the list. For example, the statement "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0035] The terms used herein are for the purpose of describing particular example configurations only and are not intended to be limiting. As used herein, the singular articles "a," "an," and "the" may also be intended to include the plural forms, unless it is clearly stated otherwise herein. The terms "comprises," "comprising," and "having" are inclusive and thus specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as necessarily requiring them to be performed in the particular order discussed or illustrated, unless specifically identified as an order of performance. Additional or alternative steps may be employed.

[0036] As used herein, phrases such as "in one embodiment," "according to one embodiment," "in some embodiments," etc., generally refer to the fact that the particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of the present disclosure. Thus, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," etc., are used "as an example, instance, or illustration." Any embodiment, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other embodiments, aspects, or designs. Instead, the use of the terms "example," "exemplary," etc., is intended to present concepts in a concrete manner.

[0037] It has been found through research that the disadvantages of the prior art are as follows: When plastic powder is processed into plastic particles by an extruder, various additives need to be added. Some additives will produce some acidic components during the high-temperature process of the extruder. During the process of plastic being extruded and granulated from the die plate, the acid will enter the granulation water, resulting in a decrease in the pH value of the granulation water. When the pH value of the granulation water is less than 7, the corrosion rate of the die plate and the cutting knife significantly accelerates.

[0038] In the prior art, the pH value of the granulation water in the granulation water tank is measured by manual sampling, and then alkali is manually added to the granulation water tank to adjust the pH value. However, manual sampling cannot monitor the pH value of the granulation water in real time, resulting in untimely adjustment. The granulation water may still be acidic during the unmonitored period, and multiple samplings and detections are carried out every day, consuming a relatively high labor cost.

[0039] Therefore, in order to solve the technical problem of how to keep the pH of the granulation water alkaline all the time, it is urgent to provide a water tank pH value control system.

[0040] Regarding the defects existing in the above solutions, they are all the results obtained by the utility model inventors after practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed by the present disclosure in this article for the above problems should all be the contributions made by the utility model inventors during the process of this disclosure.

[0041] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, in the drawings, in order to effectively describe the technical content, the thickness of the components can be exaggerated or reduced.

[0042] The following will describe in detail some embodiments of the present utility model with reference to the drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0043] Please refer to Figure 2 , the embodiment of the present disclosure provides a water tank pH value control system, including: a box body 1, which is provided with an alkali liquid inlet 2, and a pH sensor 3 is arranged on the box body 1. The box body 1 is suitable for storing granulation water, and the cutting knife of the granulator cuts polyolefin into small particles under the granulation water. An alkali adding device 4, which is connected to the box body 1, and the alkali adding device 4 is electrically connected to the pH sensor 3; wherein, the pH sensor 3 is suitable for detecting the pH value of the granulation water in the box body 1 and sending the pH value data to the alkali adding device 4, and the alkali adding device 4 opens or closes the delivery of alkali liquid to the box body 1 according to the pH value.

[0044] Please continue to refer to Figure 2, the alkali adding device 4 includes: a storage tank 41 adapted to store alkali solution; a metering pump 43, the inlet end and the outlet end of which are respectively connected to a plurality of pipelines. Preferably, the pipelines can be made of stainless steel, which has good corrosion resistance, a long service life, and can effectively reduce the equipment cost of the enterprise. The inlet end of the metering pump 43 is connected to a suction gun 42 through a hose, the outlet end of the metering pump 43 is connected to a conduit 5, and the conduit 5 is connected to the alkali solution inlet of the box body 1. A suction gun 42 is arranged above the storage tank 41, and the suction gun 42 can quickly suck out the alkali solution in the storage tank 41 and transport it to the metering pump 43 through the hose; a control module, which is electrically connected to the metering pump 43 and the PH sensor 3, and is configured to receive the PH value data of the PH sensor 3 and control the metering pump 43 to start or stop transporting the alkali solution according to the corresponding PH value.

[0045] In an optional embodiment, the control module is configured to: when the PH value in the box body 1 is less than 8.5, control the metering pump 43 to start to transport the alkali solution in the storage tank 41 to the box body 1 to ensure that the pelletizing water in the box body 1 is always alkaline; when the PH value in the box body 1 is greater than 9.5, control the metering pump 43 to stop transporting the alkali solution, avoiding waste of resources.

[0046] Compared with some existing technologies, the PH value of the pelletizing water in the pelletizing water tank is measured by manual sampling, and then alkali solution is manually added to the pelletizing water tank (corresponding to the box body 1 in this embodiment) to adjust the PH value so that the PH value remains between 9 and 10. Manual sampling cannot monitor the PH value of the pelletizing water in real time, and the pelletizing water may still turn acidic during the unmonitored period. Moreover, sampling and detection are carried out multiple times a day, consuming a high amount of labor costs. In this embodiment, by arranging the PH sensor 3 and the alkali adding device 4 in the box body 1, the automatic adjustment of the PH value of the pelletizing water is realized, which not only saves labor costs, but also ensures that the PH value of the pelletizing water is always alkaline, improving the service life of the die and the cutting knife in the pelletizing water.

[0047] In an optional embodiment, see Figure 2 , a T-shaped filter 44 is arranged at the inlet of the metering pump 43. The T-shaped filter 44 can effectively filter out solid particles and impurities in the alkali solution, protecting the metering pump 43 from blockage and damage, so as to ensure the normal operation of the equipment.

[0048] In an optional embodiment, see Figure 2 , the metering pump 43 is equipped with a pressure relief valve 45. The pressure relief valve 45 is located on the outlet side of the metering pump 43 and is connected to the metering pump 43 through a connecting pipeline. When the output pressure at the outlet end of the metering pump 43 is too high, the pressure relief valve 45 can automatically open to reduce the pressure, preventing the pipeline and equipment from being damaged due to overpressure and ensuring safety.

[0049] In an optional embodiment, see Figure 1, a collection pool 6 is arranged below the storage tank 41. The collection pool 6 is suitable for collecting the slightly leaked lye during the replacement of the storage tank 41 or the use of the equipment, so as to avoid the lye leakage from injuring the staff. Preferably, a liquid level alarm device is further arranged at the inner bottom of the storage tank 41. The alarm device is suitable for measuring the lye liquid level in the storage tank 41. When the lye liquid level is too low, the alarm device sends a warning signal to the control room to notify the on-site staff to add lye. The liquid level alarm device can be arranged independently or electrically connected to the control module. The above two arrangement methods are both prior arts, and the present embodiment does not make improvements to the circuit of the liquid level alarm device itself.

[0050] In an alternative embodiment, refer to Figure 3 , the metering pump 43 is controlled by the control module, and the control module can be but is not limited to a control module composed of a PLC module or an embedded system.

[0051] In this embodiment, for the control module being configured to receive the pH value data of the pH sensor and control the opening or stopping of the metering pump (43) to transport lye according to the corresponding pH value, and for the control module being configured to control the metering pump (43) to start transporting lye to the box body (1) when the pH value is less than 8.5; or to control the metering pump (43) to stop transporting lye when the pH value is greater than 9.5, the specific control methods all belong to the prior arts. The present embodiment does not make substantial improvements to the above programs. For those skilled in the art, it is completely capable of being realized according to their own experience.

[0052] In the description of the embodiments of the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0053] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second" and other numerical terms used herein do not imply order or sequence unless clearly indicated in the text. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer or section discussed above may be referred to as the second element, component, region, layer or section.

[0054] Spatially relative terms, such as "inner", "outer", "below", "beneath", "lower", "above", "upper", etc., may be used herein for ease of description to describe the relationship of one element or feature to another element or feature as illustrated in the figures. In addition to the orientation depicted in the figures, spatially relative terms are intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is turned over, an element described as "below" or "beneath" another element or feature will then be oriented "above" the other element or feature. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein are to be interpreted accordingly.

[0055] Based on the above inspiration from the ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A water tank pH value control system, characterized in that, Comprising: A box body (1) which is provided with an alkali liquor inlet (2) and a PH sensor (3) is arranged inside the box. An alkali adding device (4) whose conduit (5) is communicated with the alkali liquor inlet (2), and the alkali adding device (4) is electrically connected with the PH sensor (3). Wherein, the PH sensor (3) is adapted to detect the PH value of the pelletizing water in the box body (1) and send the PH value data to the alkali adding device (4), and the alkali adding device (4) opens or closes the conveyance of alkali liquor to the box body (1) according to the PH value.

2. The water tank PH value control system according to claim 1, wherein The alkali adding device (4) comprises: A storage tank (41) with a suction gun (42) arranged above it. A metering pump (43) whose inlet end and outlet end are respectively connected with a plurality of pipelines. A control module which is electrically connected with the metering pump and the PH sensor, and is configured to receive the PH value data of the PH sensor and control the metering pump (43) to start or stop conveying alkali liquor according to the corresponding PH value.

3. The water tank PH value control system according to claim 2, wherein The inlet end of the metering pump (43) is connected with the suction gun (42) through a hose, the outlet end of the metering pump (43) is connected with the conduit (5), and the conduit (5) is connected with the alkali liquor inlet (2) of the box body (1).

4. The water tank PH value control system according to claim 3, wherein A T-shaped filter (44) is arranged at the inlet of the metering pump (43).

5. The water tank PH value control system according to claim 2, wherein A pressure relief valve (45) is installed on the metering pump (43), and the pressure relief valve (45) is located on the outlet side of the metering pump (43) and is connected with the metering pump (43) through a connecting pipeline.

6. The water tank PH value control system according to claim 2, wherein The storage tank (41) is adapted to store alkali liquor, and a collection pool (6) is arranged below the storage tank (41).

7. The water tank PH value control system according to claim 6, wherein A liquid level alarm device is arranged at the inner bottom of the storage tank (41), the alarm device is adapted to measure the alkali liquor level in the storage tank (41), and when the alkali liquor level is too low, the alarm device sends a warning signal to the control room.

8. The water tank PH value control system according to claim 2, wherein The control module is configured as: When the PH value is less than 8.5, controlling the metering pump (43) to start conveying alkali liquor to the box body (1); or When the PH value is greater than 9.5, controlling the metering pump (43) to stop conveying alkali liquor.

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