External measurement device of guided wave radar liquid level meter for polystyrene waste liquid tank

Abstract

The utility model discloses an external measuring device of a guided wave radar liquid level meter for a polystyrene waste liquid tank, which belongs to the technical field of chemical equipment and comprises a polystyrene circulating liquid tank for receiving waste liquid in the polystyrene production process. A tank body of the polystyrene circulating liquid tank extends from top to bottom to form a first connecting pipe and a second extending pipe, one ends of the first extending pipe and the second extending pipe are communicated with the polystyrene circulating liquid tank, the other ends of the first extending pipe and the second extending pipe are communicated with the measuring cylinder, the lower end of the measuring cylinder is closed, and a wave guide rod of the wave guide radar liquid level meter is inserted from the upper portion of the measuring cylinder. Due to the design of the flow guide groove, when liquid in the polystyrene circulating liquid tank fluctuates, the liquid entering the flow guide cylinder is stable through the arrangement of the flow guide groove, and therefore the liquid level detection error caused by rapid rising or rapid falling of the liquid level due to fluctuation is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of chemical equipment technology, specifically relating to an external measuring device for a guided wave radar level gauge used in polystyrene waste liquid tanks. Background Technology

[0002] In the polystyrene production process, waste liquid tanks are used to store the circulating waste liquid generated during the production process. Due to the special nature of the production process, the pressure inside the waste liquid tank will change frequently, usually switching between negative pressure and normal pressure every 8 hours. In addition, the medium inside the waste liquid tank is a circulating liquid with certain fluidity and foaming characteristics, which puts higher requirements on the stability and accuracy of the liquid level measurement equipment.

[0003] Traditional liquid level measurement equipment typically uses dual-flange transmitters, which calculate the liquid level by measuring the pressure difference between the two flanges. However, in the operating conditions of polystyrene waste tanks, dual-flange transmitters have the following problems:

[0004] 1. Prone to damage: Frequent pressure changes can cause repeated deformation of the diaphragm of the dual-flange transmitter, which can easily lead to fatigue damage after long-term use;

[0005] 2. High maintenance costs: Due to the high frequency of equipment failures, frequent replacements and maintenance are required, increasing production costs;

[0006] 3. Decreased measurement accuracy: Pressure changes and the fluidity of the circulating fluid can affect the measurement accuracy of the dual-flange transmitter, resulting in inaccurate level data;

[0007] To address the aforementioned issues, this invention proposes a liquid level measuring device that employs a guided wave radar level gauge combined with an external measuring cylinder, enabling stable and accurate liquid level measurement under conditions of frequent pressure changes and circulating liquid operation. Utility Model Content

[0008] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an external measuring device for a guided wave radar level gauge for polystyrene waste liquid tank, which can effectively solve the problems mentioned in the background technology.

[0009] To achieve the above objectives, this utility model is implemented through the following technical solution: an external measuring device for a guided wave radar level gauge for a polystyrene waste liquid tank, comprising a polystyrene circulating liquid tank for receiving waste liquid during the polystyrene production process, characterized in that the tank body of the polystyrene circulating liquid tank extends from top to bottom with a first extension pipe and a second extension pipe, one end of the first extension pipe and the second extension pipe being connected to the polystyrene circulating liquid tank and the other end being connected to a measuring cylinder, the lower end of the measuring cylinder being closed, and the waveguide rod of the guided wave radar level gauge being inserted from the upper part of the measuring cylinder;

[0010] Specifically: the left side of the first extension tube and the second extension tube are connected to the polystyrene circulating liquid tank, the first extension tube is at the top and the second extension tube is at the bottom, the right side of the first extension tube and the second extension tube are connected to the measuring cylinder, and the waveguide rod of the guided wave radar level gauge is inserted into the measuring cylinder from the top of the measuring cylinder for measuring the liquid level.

[0011] Furthermore: the measuring cylinder has a built-in guide tube, and a guide groove penetrating the cylinder wall is formed on the tube wall;

[0012] Specifically: the axis of the guide tube overlaps with the axis of the measuring tube, the upper and lower parts of the guide tube are fixedly connected to the measuring tube, and the guide groove opened on the guide tube can be a vertical groove or an inclined groove.

[0013] Furthermore, the outer wall of the guide tube is fitted with wall rings at equal intervals from bottom to top, and the wall rings are detachably connected to the guide tube.

[0014] Compared with the known prior art, the technical solution provided by this utility model has the following beneficial effects: By using a radar guided wave level gauge in conjunction with an external measuring cylinder, the radar guided wave level gauge is inserted into the measuring cylinder, and the liquid level in the measuring cylinder is equal to the liquid level in the polystyrene circulating liquid tank. Using a radar guided wave level gauge avoids the problem of diaphragm damage caused by frequent pressure changes in the polystyrene circulating liquid tank in dual-flange level gauges. At the same time, using a guided wave radar level gauge facilitates installation and maintenance, reduces downtime, and improves production efficiency. On the other hand, a guide tube is installed inside the measuring cylinder, and a guide groove is opened on the guide tube. When the liquid in the polystyrene circulating liquid tank fluctuates, the design of the guide groove makes the liquid entering the guide tube stable, thereby reducing the liquid level detection error caused by rapid rise or fall of the liquid level due to fluctuations. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This utility model Figure 1 Enlarged view of a portion of point A in the middle;

[0018] Figure 3 This utility model Figure 1 A partial sectional view at point A in the middle.

[0019] The labels in the diagram represent:

[0020] 1. Polystyrene circulating liquid tank; 2. First extension tube; 3. Second extension tube; 4. Measuring cylinder; 5. Guided wave radar level gauge; 6. Waveguide rod; 7. Flow guide tube; 8. Flow guide groove; 9. Wall ring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0022] The present invention will be further described below with reference to the embodiments.

[0023] Example 1:

[0024] Reference Figure 1 An external measuring device for a guided wave radar level gauge for a polystyrene waste liquid tank includes a polystyrene circulating liquid tank 1 for receiving waste liquid during the polystyrene production process. The tank body of the polystyrene circulating liquid tank 1 extends from top to bottom with a first extension pipe 2 and a second extension pipe 3. One end of the first extension pipe 2 and the second extension pipe 3 are connected to the polystyrene circulating liquid tank 1, and the other end is connected to a measuring cylinder 4. The lower end of the measuring cylinder 4 is closed, and the waveguide rod 6 of the guided wave radar level gauge 5 is inserted from the upper part of the measuring cylinder 4.

[0025] By adopting the above technical solution, one embodiment of this utility model is as follows: the liquid in the polystyrene circulating liquid tank 1 enters the measuring cylinder 4 through the lower second extension pipe 3. The liquid level in the measuring cylinder 4 is the same as the liquid level in the polystyrene circulating liquid tank 1. The measuring cylinder is made of stainless steel to avoid damage caused by pressure changes in the polystyrene circulating liquid tank 1. The guided wave radar level gauge 5 is installed on the upper part of the measuring cylinder 4. The waveguide rod 6 is inserted into the measuring cylinder 4 to measure the liquid level height. The design of the measuring cylinder 4 and the guided wave radar level gauge 5 avoids the problem of diaphragm damage caused by frequent pressure changes in the polystyrene circulating liquid tank 1 in the double flange level gauge. At the same time, the use of the guided wave radar level gauge facilitates installation and maintenance, reduces downtime, and improves production efficiency.

[0026] Example 2:

[0027] Reference Figures 1-3An external measuring device for a guided wave radar level gauge for a polystyrene waste liquid tank includes a polystyrene circulating liquid tank 1 for receiving waste liquid during the polystyrene production process. The device is characterized in that the tank body of the polystyrene circulating liquid tank 1 has a first extension pipe 2 and a second extension pipe 3 extending from top to bottom. One end of the first extension pipe 2 and the second extension pipe 3 are connected to the polystyrene circulating liquid tank 1, and the other end is connected to a measuring cylinder 4. The lower end of the measuring cylinder 4 is closed. A waveguide rod 6 of the guided wave radar level gauge 5 is inserted from the upper part of the measuring cylinder 4. A flow guide cylinder 7 is built into the measuring cylinder 4. A flow guide groove 8 penetrating the cylinder wall is formed on the cylinder wall of the flow guide cylinder 7. Wall rings 9 are equidistantly fitted from bottom to top on the outer wall of the flow guide cylinder 7. The wall rings 9 are detachably connected to the flow guide cylinder 7.

[0028] By adopting the above technical solution, the liquid in the polystyrene circulating liquid tank 1 enters the measuring cylinder 4 through the lower second extension pipe 3. The guided wave radar level gauge 5 is installed on the upper part of the measuring cylinder 4. The guided wave rod 6 is inserted into the measuring cylinder 4 to measure the liquid level height. The liquid entering the measuring cylinder 4 enters the interior of the guide cylinder 7 through the guide groove 8. When the liquid in the polystyrene circulating liquid tank 1 fluctuates, the setting of the guide groove 8 makes the liquid entering the guide cylinder 7 stable, thereby reducing the liquid level detection error caused by the rapid rise or fall of the liquid level due to fluctuation.

[0029] The further improvement based on the above scheme is the addition of multiple wall rings 9 on the guide tube 7. Since polystyrene waste liquid has certain foaming characteristics, the foam generated by the liquid entering the measuring tube 4 is isolated by the wall rings 9 as the liquid level rises and fluctuates rapidly, reducing the liquid level detection error caused by the rapid rise or fall of the liquid level due to fluctuations.

[0030] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. An external guided wave radar level gauge measuring device for a polystyrene waste liquid tank, comprising a polystyrene circulating liquid tank (1) for storing waste liquid from the polystyrene production process, characterized in that, The polystyrene circulating liquid tank (1) has a first extension pipe (2) and a second extension pipe (3) extending from top to bottom. One end of the first extension pipe (2) and the second extension pipe (3) are connected to the polystyrene circulating liquid tank (1), and the other end is connected to the measuring cylinder (4). The lower end of the measuring cylinder (4) is closed, and the waveguide rod (6) of the guided wave radar level gauge (5) is inserted from the upper part of the measuring cylinder (4).

2. The guided wave radar level gauge external measuring device for polystyrene waste liquid tanks according to claim 1, characterized in that, The measuring cylinder (4) has a built-in guide cylinder (7), and a guide groove (8) that penetrates the cylinder wall is opened on the cylinder wall of the guide cylinder (7).

3. The guided wave radar level gauge external measuring device for polystyrene waste liquid tanks according to claim 2, characterized in that, The outer wall of the guide tube (7) is fitted with wall rings (9) at equal intervals from bottom to top, and the wall rings (9) are detachably connected to the guide tube (7).

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