Polymerization pipe liquid level measuring structure for chinlon 6 slice production

Abstract

The utility model discloses a polymerization tube liquid level measuring structure for chinlon 6 slice production. The polymerization tube liquid level measuring structure comprises a polymerization tube, the radar liquid level meter is arranged on the upper wall of the polymerization pipe and communicates with the interior of the polymerization pipe, and a detection part of the radar liquid level meter is arranged downwards and used for detecting the liquid level height in the polymerization pipe; the manual stop valve is installed on the upper wall of the polymerization pipe and located on the outer side of the polymerization pipe, and the manual stop valve is arranged between the polymerization pipe and the radar liquid level meter and suitable for driving the radar liquid level meter to be separated from the polymerization pipe. A non-contact radar liquid level meter is adopted to directly face the liquid level in a polymerization pipe, high-precision measurement of the liquid level of a polymer material in chinlon 6 chip production is achieved, and great significance is achieved for controlling reaction conditions and guaranteeing product quality. Moreover, the radar liquid level meter is quickly isolated from the internal space of the polymerization pipe by the manual stop valve when needed, so that the maintenance, calibration or fault processing flow of the liquid level meter is simplified, the operation of the whole production line does not need to be stopped, and the shutdown loss caused by equipment maintenance is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of nylon 6 slice production, in particular to a polymer tube liquid level measuring structure used for nylon 6 slice production. Background Art

[0002] In the production process of nylon 6 chips, polymerization reaction is one of the key steps. This process is usually carried out under high temperature and high pressure environment, and requires strict control of the liquid level of the reaction materials to ensure product quality and production safety. Among them, the liquid level measurement and control of the polymerization tube is a key process to ensure product quality.

[0003] Traditional liquid level measurement methods such as float type and capacitance type are prone to problems such as large measurement errors, high maintenance costs, and short life under complex working conditions such as high temperature, high pressure, corrosion, or foam generation.

[0004] In the related art, a polymer tube uses a float level gauge to measure the liquid level change, wherein the float level gauge uses the Archimedes buoyancy principle to measure the liquid level change, and is mainly composed of a measurement conversion mechanism, a float, etc., and the level gauge is installed in the polymer tube in direct contact with the material.

[0005] In this regard, the disadvantages found in the use are:

[0006] 1. The level gauge cannot be easily separated from the connection with the polymer tube, which makes maintenance difficult. Each time maintenance is performed, the polymer tube must be depressurized and cooled before it can be removed, which greatly affects product quality.

[0007] 2. The measurement accuracy is low, which is not conducive to the stable control of the liquid level in the polymerization tube.

[0008] 3. Since the material viscosity of the polymer tube is relatively high, the float and the protective sleeve are often blocked by the material, causing the float to stick, resulting in failure of liquid level measurement.

[0009] Especially for large containers such as polymerization tubes, accurate and reliable liquid level measurement is particularly important, but the installation position and structural design of the liquid level meter in the existing technology often cannot adapt well to the special conditions in the polymerization reaction process, affecting the measurement accuracy and the maintenance convenience of the equipment. Utility Model Content

[0010] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a polymer tube liquid level measurement structure for the production of nylon 6 slices, which can accurately measure and monitor the liquid level changes in the polymer tube, stably control the liquid level of the polymer tube, ensure the stability of product indicators, eliminate the problem of product output reduction caused by liquid level meter maintenance, and reduce production losses.

[0011] The polymer tube liquid level measurement structure for nylon 6 chip production according to the embodiment of the utility model comprises:

[0012] Polymer tube;

[0013] A radar level gauge is arranged on the upper wall of the polymer tube and communicated with the interior of the polymer tube, wherein the detection portion of the radar level gauge is arranged downward and is used to detect the liquid level height in the polymer tube;

[0014] A manual stop valve is installed on the upper wall of the polymer tube and located outside the polymer tube. The manual stop valve is arranged between the polymer tube and the radar level gauge and is suitable for driving the radar level gauge to be separated from the polymer tube.

[0015] The polymer tube liquid level measurement structure for the production of nylon 6 chips according to the embodiment of the utility model has at least the following beneficial effects: a non-contact radar liquid level meter is used to directly face the liquid surface inside the polymer tube, which can effectively reduce interference factors such as gas foam and solid particle suspension in the measurement process, and realize high-precision measurement of the polymer material liquid level in the production of nylon 6 chips, which is of great significance for controlling reaction conditions and ensuring product quality; and the manual stop valve design allows the radar liquid level meter to be quickly isolated from the internal space of the polymer tube when necessary, which simplifies the maintenance, calibration or troubleshooting process of the liquid level meter without stopping the operation of the entire production line, greatly improves production continuity and maintenance efficiency, and reduces downtime losses caused by equipment maintenance; the manual stop valve adopts a manual direct control method, which increases the controllability of the system in an emergency, can quickly isolate possible leakage risks, prevent the leakage of chemical substances, and ensure the safety of production site personnel and the cleanliness of the environment.

[0016] According to the polymer tube liquid level measurement structure for nylon 6 slice production described in the utility model, the radar liquid level meter is eccentrically arranged on the polymer tube.

[0017] According to the polymer tube liquid level measurement structure for nylon 6 slice production described in the utility model, the minimum distance between the radar level gauge and the inner circumferential wall of the polymer tube is A, and the diameter of the polymer tube is B, which satisfies: B / 6≤A≤B / 4.

[0018] According to the polymer tube liquid level measurement structure for nylon 6 slice production described in the utility model, the minimum distance between the radar level gauge and the inner peripheral wall of the polymer tube is greater than 200 mm.

[0019] According to the polymer tube liquid level measurement structure for nylon 6 slice production described in the utility model, the radar level meter includes an antenna, and the antenna extends downward into the polymer tube by at least 10 mm.

[0020] According to the polymer tube liquid level measurement structure for nylon 6 slice production described in the utility model, the manual stop valve is a manual ball valve.

[0021] According to the polymer tube liquid level measurement structure for nylon 6 slice production described in the utility model, a mounting portion is provided on the upper wall of the polymer tube, the mounting portion extends upward, a mounting flange is connected to the upper end of the mounting portion, and the manual stop valve and the radar liquid level meter are both installed on the mounting flange.

[0022] According to the polymer tube liquid level measurement structure for nylon 6 slice production described in the utility model, the upper end surface of the mounting flange is arranged horizontally.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1 This is a schematic diagram of a polymer tube liquid level measurement structure used in the production of nylon 6 chips according to an embodiment of the utility model;

[0026] Figure 2 It is a schematic diagram of the liquid level measurement of the polymer tube in the prior art.

[0027] Description of Figure Numbers:

[0028] Polymer tube 100; mounting portion 110; mounting flange 111;

[0029] Radar level meter 200; antenna 210;

[0030] Manual ball valve 300;

[0031] Buoy 400; boom 410; sleeve 420. DETAILED DESCRIPTION

[0032] 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.

[0033] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 the present invention.

[0034] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] In the production process of nylon 6 chips, polymerization reaction is one of the key steps. This process is usually carried out under high temperature and high pressure environment, and requires strict control of the liquid level of the reaction materials to ensure product quality and production safety. Among them, the liquid level measurement and control of the polymerization tube is a key process to ensure product quality.

[0038] Traditional liquid level measurement methods such as float type and capacitance type are prone to problems such as large measurement errors, high maintenance costs, and short life under complex working conditions such as high temperature, high pressure, corrosion, or foam generation.

[0039] In the related art, the polymer tube uses a float level gauge to measure the liquid level change, wherein the float level gauge uses the Archimedes buoyancy principle to measure the liquid level change, and is mainly composed of a measurement conversion mechanism, a float, etc., and the level gauge is installed in the polymer tube and is in direct contact with the material. Figure 2The float level gauge includes a float 400, a suspension rod 410 and a sleeve 420. The float 400 and the sleeve 420 extend into the interior of the polymerization tube 100 through the suspension rod 410 and are in direct contact with the liquid. The height of the liquid surface is measured according to the position of the float 400 floating on the liquid surface.

[0040] In this regard, the disadvantages found in the use are:

[0041] 1. The level gauge cannot be easily separated from the connection with the polymer tube 100, which makes maintenance difficult. Each time maintenance is performed, the polymer tube 100 must be depressurized and cooled before it can be removed, which greatly affects product quality.

[0042] 2. The measurement accuracy is low, which is not conducive to the stable control of the liquid level of the polymerization tube 100.

[0043] 3. Since the material viscosity of the polymer tube 100 is relatively high, the float 400 and the protective sleeve 420 are often clogged by the material, causing the float 400 to stick, resulting in failure of liquid level measurement.

[0044] Especially for large containers such as polymerization tubes, accurate and reliable liquid level measurement is particularly important, but the installation position and structural design of the liquid level meter in the existing technology often cannot adapt well to the special conditions in the polymerization reaction process, affecting the measurement accuracy and the maintenance convenience of the equipment.

[0045] For this reason, Figure 1As shown in the figure, the polymer tube liquid level measurement structure for nylon 6 slice production proposed by the utility model includes a polymer tube 100, a radar level gauge 200 and a manual stop valve, wherein the radar level gauge 200 is arranged on the upper wall of the polymer tube 100 and communicated with the inside of the polymer tube 100, and the detection part of the radar level gauge 200 is arranged downward and used to detect the liquid level height in the polymer tube 100. In addition, the manual stop valve is installed on the upper wall of the polymer tube 100 and located outside the polymer tube 100, and the manual stop valve is arranged between the polymer tube 100 and the radar level gauge 200, and is suitable for driving the radar level gauge 200 to separate from the polymer tube 100. It should be noted that the use of a non-contact radar level gauge 200 directly facing the internal liquid surface of the polymer tube 100 can effectively reduce interference factors such as gas foam and solid particle suspension in the measurement process, and realize high-precision measurement of the polymer material liquid level in the production of nylon 6 slices, which is of great significance for controlling reaction conditions and ensuring product quality. In addition, the manual stop valve design allows the radar level meter 200 to be quickly isolated from the internal space of the polymer tube 100 when necessary, which simplifies the maintenance, calibration or troubleshooting process of the level meter without stopping the operation of the entire production line, greatly improving production continuity and maintenance efficiency, and reducing downtime losses caused by equipment maintenance. The manual stop valve adopts a manual direct control method, which increases the controllability of the system in an emergency, can quickly isolate possible leakage risks, prevent chemical substances from leaking, and ensure the safety of production site personnel and the cleanliness of the environment.

[0046] Optionally, the manual stop valve is a manual ball valve 300. It should be noted that the manual ball valve 300 is known for its durability, especially after the valve core and sealing ring such as wear-resistant alloy steel spraying are adopted, it can effectively resist corrosion and wear, and ensure long-term reliable operation, which is particularly important for the chemical production environment of continuous operation. In addition, compared with the automatic control valve, the manual ball valve 300 has a simple structure, low initial investment and maintenance costs, and does not require complex control system support, which is suitable for production facilities of various sizes, especially in production links that are sensitive to cost control. In application, the manual ball valve 300 can realize the rapid opening and closing of the valve by rotating the handle, and the operation is simple and intuitive, does not require complex tools or skills, and is convenient for on-site personnel to operate and control. Specifically, the upper wall of the polymer tube 100 is provided with a mounting portion 110, the mounting portion 110 extends upward, and the upper end of the mounting portion 110 is connected to a mounting flange 111, and the manual stop valve and the radar level meter 200 are both installed on the mounting flange 111. Among them, through the standardized flange connection method, the sealing between the components can be more reliably guaranteed, preventing material leakage or external contaminants from entering during the production process, thereby maintaining production safety and product quality. In addition, the mounting portion 110 extends upward and connects to the mounting flange 111. Such a structural design strengthens the connection strength between the radar level meter 200 and the polymer tube 100, ensuring the stability and durability of the equipment during long-term operation, especially under high temperature and high pressure conditions, and reducing the risk of displacement or damage caused by vibration or external force. Furthermore, the upper end surface of the mounting flange 111 is arranged horizontally, and the detection end of the installed radar level meter 200 can be directly shot into the liquid surface in the polymer tube 100, thereby improving the accuracy of the detection.

[0047] Refer to Figure 1The radar level meter 200 is eccentrically arranged on the polymer tube 100, which can avoid the interference of strong convection or foam accumulation in the central area on the measurement signal, and improve the stability and accuracy of the measurement. In addition, the eccentric arrangement may reduce the risk of direct impact or contamination of the radar level meter 200 and extend its service life. Specifically, the minimum distance between the radar level meter 200 and the inner circumferential wall of the polymer tube 100 is A, and the diameter of the polymer tube 100 is B, which satisfies: B / 6≤A≤B / 4, ensuring that the radar wave can fully cover the liquid surface and avoid direct reflection, while maintaining a sufficient distance from the inner circumferential wall of the polymer tube 100 to reduce the risk of physical contact, balancing the measurement accuracy and installation space requirements, and further improving the reliability of the measurement and the durability of the equipment. In some embodiments, the minimum distance between the radar level meter 200 and the inner circumferential wall of the polymer tube 100 is greater than 200 mm. In addition, the radar level meter 200 includes an antenna 210, which extends downward into the polymer tube 100 by at least 10 mm, thereby reducing measurement interference caused by surface fluctuations or foam, increasing the penetration and reception quality of the measurement signal, and thus improving the sensitivity and accuracy of the liquid level measurement. At the same time, the deep arrangement of the antenna 210 helps to maintain stable measurement performance even when the material density or dielectric constant changes greatly.

[0048] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A polymer tube liquid level measurement structure for nylon 6 chip production, characterized in that: include: Polymer tube; A radar level gauge is arranged on the upper wall of the polymer tube and communicated with the interior of the polymer tube, wherein the detection portion of the radar level gauge is arranged downward and is used to detect the liquid level height in the polymer tube; A manual stop valve is installed on the upper wall of the polymer tube and located outside the polymer tube. The manual stop valve is arranged between the polymer tube and the radar level gauge and is suitable for driving the radar level gauge to be separated from the polymer tube.

2. The polymer tube liquid level measurement structure for nylon 6 chip production according to claim 1 is characterized in that: The radar level gauge is eccentrically arranged on the polymer tube.

3. The polymer tube liquid level measurement structure for nylon 6 chip production according to claim 2 is characterized in that: The minimum distance between the radar level gauge and the inner circumferential wall of the polymer tube is A, and the diameter of the polymer tube is B, satisfying: B / 6≤A≤B / 4.

4. The polymer tube liquid level measurement structure for nylon 6 chip production according to claim 2 is characterized in that: The minimum distance between the radar level gauge and the inner circumferential wall of the polymer tube is greater than 200 mm.

5. The polymer tube liquid level measurement structure for nylon 6 chip production according to claim 1 is characterized in that: The radar level gauge comprises an antenna which extends downwardly into the polymeric tube by at least 10 mm.

6. The polymer tube liquid level measurement structure for nylon 6 chip production according to claim 1 is characterized in that: The manual stop valve is a manual ball valve.

7. The polymer tube liquid level measurement structure for nylon 6 chip production according to claim 1 is characterized in that: The upper wall of the polymer tube is provided with a mounting portion, the mounting portion extends upward, the upper end of the mounting portion is connected with a mounting flange, and the manual stop valve and the radar level meter are both mounted on the mounting flange.

8. The polymer tube liquid level measurement structure for nylon 6 chip production according to claim 7 is characterized in that: The upper end surface of the mounting flange is arranged horizontally.

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