Circulating cooling water system pre-film acceptance test device

Abstract

The utility model discloses a circulating cooling water system pre-film acceptance experiment device which comprises an experiment box, a box opening with the longitudinal width smaller than that of the experiment box is formed in the top of the back face of the experiment box, and a transparent observation plate inclining backwards and upwards is arranged between the position, close to the front face, of the top of the experiment box and the bottom of the box opening. A box body formed by the experiment box, the box opening and the transparent observation plate is of an integrated structure with only the top of the box opening being open, and a crosspiece for placing a pre-filming test piece is horizontally fixed in the experiment box. According to the utility model, a pre-film acceptance experiment is carried out in the box body which is composed of the experiment box, the box opening and the transparent observation plate and is of an integrated structure, only the top of the box opening is open, a pre-film test piece is placed in the experiment box and is fixed by the inner fixing suction cup, and the experiment box is stably placed on the experiment table through the outer fixing suction cup and is sealed by covering the box cover. Experimental internal and external environments are isolated to a certain extent, and the influence of the laboratory environment on the internal environment of the experimental box is reduced, so that the accuracy of experimental result data is improved.

Description

Technical Field

[0001] This utility model relates to the field of pipeline pre-filming technology, specifically to a pre-filming acceptance test device for circulating cooling water systems. Background Technology

[0002] A complete water treatment solution includes cleaning, pre-filming, and routine treatment procedures. Circulating cooling water systems, whether new or old, require system cleaning and pre-filming before normal chemical dosing. These cleaning and pre-filming processes are referred to as pretreatment for the chemical treatment of circulating water systems.

[0003] For new systems, various types of contaminants, such as oil, rust, iron scale, welding slag, dirt, sand, and dust, are inevitably left in the equipment and pipelines during the various stages of processing, manufacturing, packaging, transportation, installation, assembly, and storage. The rust and oil stains on cooling equipment that has been in use for many years are also very serious. If these impurities and oil stains are not cleaned, they will affect the next step of pre-filming treatment.

[0004] The purpose of pre-filming is to pre-form a complete and corrosion-resistant protective film on the surface of active metals that are in an activated state after cleaning, especially after pickling, or on the surface of metals whose protective film has been severely damaged, before putting them into normal operation. The conditions that need to be met during pre-filming are as follows: (1) Turbidity of circulating cooling water < 20 mg / L, total iron < 1 mg / L. If the turbidity of the water is too high or contains a lot of iron ions, it will affect the quality of film formation; (2) Calcium ion content ≥ 125 mg / L. Generally speaking, an important factor in the pre-filming process is to have enough calcium ions. When the calcium ion content in the water is 100-200 mg / L, the pre-filming effect is better; (3) Sufficient pre-filming agent; (4) Appropriate amount of sulfuric acid; (5) Temperature > 15℃; (6) Flow rate; (7) Residence time; (8) Monitoring.

[0005] After pre-filming, acceptance testing is required to verify the pre-filming effect and ensure that the pre-filming is qualified and the pipeline can be put into normal use. Currently, there are several methods for pipeline pre-filming acceptance. One method is the pre-filming acceptance test. During pipeline pre-filming, a pre-filming test piece (a metal sheet of the same material as the pipeline) is suspended in the same pre-filming liquid environment as the pipeline. The same pre-cleaning and pre-filming processes are performed on the test piece, and the pre-filming test is then used to verify the effectiveness of the pipeline pre-filming.

[0006] For example, the copper sulfate red dot test method is used for passivation membranes made of carbon steel: 15g of calcium chloride and 5g of copper sulfate are dissolved in 100ml of distilled water. This test solution is dropped onto a pre-filmed, flat-ly placed pre-filmed test piece. The time required for a red dot to appear on the test piece should be greater than 10 seconds, indicating successful pre-filming. Existing technologies rely on direct experiments. However, some acceptance tests are time-consuming, and the laboratory environment is easily affected by seasonal changes and temperature and humidity variations, often negatively impacting the acceptance test results. To facilitate pre-filming acceptance tests, a pre-filming acceptance test device for a circulating cooling water system is designed and proposed. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a pre-filming acceptance test device for circulating cooling water systems. This device solves the problem that direct acceptance testing in existing technologies is susceptible to changes in the laboratory environment due to seasonal variations and changes in temperature and humidity, which can negatively impact the test results.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0009] The pre-filming acceptance test device for a circulating cooling water system includes a test chamber. The top back of the test chamber has an opening with a longitudinal width smaller than the longitudinal width of the test chamber. A transparent observation plate that tilts backward and upward is provided between the top of the test chamber near the front and the bottom of the opening. The test chamber, the opening, and the transparent observation plate form a single structure with only the top of the opening open.

[0010] The experimental chamber has a horizontally fixed crossbar for placing pre-filmed test pieces inside. The top of the chamber opening is hinged to a chamber cover. A movable buckle is also provided between the chamber opening and the chamber cover. A sealing strip is embedded around the top of the chamber opening.

[0011] The top of the box cover is provided with a perforation, and an air pressure balancer is fixed at the position corresponding to the perforation on the top of the box cover. The top and bottom of the air pressure balancer are provided with through holes corresponding to the perforation positions. A diaphragm is horizontally fixed inside the air pressure balancer, and an air hole is provided in the center of the diaphragm.

[0012] Preferably, the longitudinal width of the opening does not exceed half the longitudinal width of the experimental box.

[0013] Preferably, the experimental box, the box opening, and the transparent observation plate are a single transparent box.

[0014] Preferably, the angle of the transparent observation plate is 10°-30°.

[0015] Preferably, the bottom of the experimental box is fixed with external suction cups facing downwards near the four corners.

[0016] Preferably, the crossbar is fixed with an internal fixing suction cup at the bottom of the pre-filmed test piece near the four corners, and the suction cup of the internal fixing suction cup is facing upward to adsorb the pre-filmed test piece.

[0017] Preferably, the lid is a cone shape with an upward convexity at the top center, and the air pressure balancer is located at the top center of the lid.

[0018] Preferably, the pressure balancer is a hollow cylindrical shape, and the diaphragm is a circular elastic rubber pad.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) This utility model conducts a pre-film acceptance test in a box with an integrated structure consisting of an experimental box, a box opening, and a transparent observation plate, with only the top of the box opening open. The pre-film test piece is placed inside the experimental box and fixed by an internal suction cup. The experimental box is placed stably on the experimental table by an external suction cup and sealed by closing the box lid. This isolates the internal and external environments of the experiment to a certain extent, reduces the influence of the laboratory environment on the internal environment of the experimental box, and thus improves the accuracy of the experimental results data. This solves the problem that the laboratory environment is easily affected by seasonal and temperature and humidity changes in the existing technology, which has a negative impact on the acceptance test results.

[0021] (2) This utility model conducts a pre-filming experiment in a relatively sealed experimental chamber. By setting up a pressure balancer, when the temperature of the external environment changes and causes the air inside the experimental chamber to expand and contract, the pressure balancer can alleviate the internal pressure change by deforming the diaphragm upward or downward. When the deformation is insufficient, the pressure can be balanced by the elastic expansion of the central air hole after the degree of diaphragm deformation increases. This avoids the problem of unbalanced internal pressure caused by the sealing of the experimental chamber 1. Attached Figure Description

[0022] Figure 1 This is a front view of the present utility model;

[0023] Figure 2 This is the left view of the present invention;

[0024] Figure 3 This is a left view of the internal structure of this utility model;

[0025] Figure 4 This is a top view of the internal structure of the experimental box of this utility model;

[0026] Figure 5 This is a left sectional view of the box cover and air pressure balancer of this utility model.

[0027] In the diagram: 1. Experimental chamber; 2. Chamber opening; 3. Transparent observation plate; 4. Pre-film test piece; 5. Horizontal bar; 6. Chamber lid; 7. Movable buckle; 8. Sealing strip; 9. Perforation; 10. Air pressure balancer; 11. Through hole; 12. Diaphragm; 13. Air hole; 14. External fixing suction cup; 15. Internal fixing suction cup. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figure 1-5 As shown, this utility model provides a technical solution: a pre-filming acceptance test device for a circulating cooling water system, including a test chamber 1. The top back of the test chamber 1 is provided with a chamber opening 2 whose longitudinal width is smaller than the longitudinal width of the test chamber 1. The longitudinal width of the chamber opening 2 does not exceed half of the longitudinal width of the test chamber 1. A transparent observation plate 3 that tilts backward and upward is provided between the top of the test chamber 1 near the front and the bottom of the chamber opening 2. The angle of the transparent observation plate 3 is 10°-30°. The chamber opening 2 does not need to be too wide in the longitudinal direction. It only needs to be able to smoothly pick up and put in the pre-filming test piece 4 and add the test liquid. Reducing the width of the chamber opening 2 can increase the width of the transparent observation plate 3, which makes it convenient to observe the color change at the position where the test liquid is added during the acceptance of the pre-filming test piece 4 from the outside.

[0030] The test chamber 1, the opening 2, and the transparent observation plate 3 are an integrated structure with only the top of the opening 2 open. The test chamber 1, the opening 2, and the transparent observation plate 3 are an integrated transparent structure with good integrity, which is convenient for production and manufacturing as well as for use. At the bottom of the test chamber 1, near the four corners, there are external suction cups 14 with the suction cups facing downwards. Some pre-filming acceptance tests last for several hours, and the test chamber 1 needs to be placed on the test table for a long time. The test chamber 1 is attached to the test table by the external suction cups 14, so that it is placed more stably. This prevents the test chamber 1 from being accidentally bumped during other work, which would cause the internal pre-filming test piece 4 to shake, thereby avoiding the test liquid dripping on the surface of the pre-filming test piece 4 from flowing and affecting the acceptance test.

[0031] Inside the test chamber 1, there is a horizontally fixed crossbar 5 for placing the pre-filmed test piece 4. The crossbar 5 is fixed with an inner fixed suction cup 15 at the bottom of the pre-filmed test piece 4 near the four corners. The suction cups of the inner fixed suction cup 15 face upwards to adsorb the pre-filmed test piece 4. The inner fixed suction cup 15 makes the pre-filmed test piece 4 relatively stable, preventing the test chamber 1 from being accidentally bumped during other work during the pre-filming acceptance test, which would cause the pre-filmed test piece 4 to shake, and preventing the test liquid dripped on the surface of the pre-filmed test piece 4 from flowing and affecting the acceptance test.

[0032] The top of the box opening 2 is hinged to a box cover 6. A movable buckle 7 is also provided between the box opening 2 and the box cover 6. A sealing strip 8 is embedded in the top of the box opening 2 to enhance the sealing effect of the test box 1 and avoid excessive evaporation of the test solution added during the long-term pre-film acceptance test, which would increase the concentration and affect the test results. It can also reduce the influence of ambient humidity on the air humidity inside the test box 1 during the pre-film acceptance test when the air humidity is high.

[0033] The top of the lid 6 is provided with a perforation 9. A pressure balancer 10 is fixed at the position of the perforation 9 on the top of the lid 6. The lid 6 is a cone shape with the top center protruding upwards. The pressure balancer 10 is located at the top center of the lid 6. The top and bottom of the pressure balancer 10 are provided with through holes 11 corresponding to the positions of the perforation 9. A diaphragm 12 is horizontally fixed inside the pressure balancer 10. The pressure balancer 10 is a hollow cylinder. The diaphragm 12 is a circular elastic rubber pad. An air hole 13 is provided in the center of the diaphragm 12.

[0034] Working principle:

[0035] A pre-film acceptance test is conducted inside a box with an integrated structure consisting of an experimental chamber 1, a box opening 2, and a transparent observation plate 3, with only the top of the box opening 2 being open. The pre-film test piece 4 is placed inside the experimental chamber and fixed by an internal suction cup 15. The experimental chamber is placed stably on the experimental table by an external suction cup 14 and sealed by closing the box lid 6, which to a certain extent isolates the internal and external environments of the experiment, reduces the influence of the laboratory environment on the internal environment of the experimental chamber, and thus improves the accuracy of the experimental results. When the air inside the experimental chamber 1 expands and contracts due to changes in the external temperature, the pressure balancer 10 alleviates the internal pressure change by deforming the diaphragm 12 upwards or downwards. If the deformation is insufficient, the pressure can be balanced by the elastic expansion of the central pore 13 after the deformation of the diaphragm 12 increases, thus avoiding the problem of unbalanced internal pressure changes caused by the sealing of the experimental chamber 1.

[0036] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pre-filming acceptance test apparatus for a circulating cooling water system, characterized in that: The experimental box (1) is provided with a box opening (2) on the top back of the experimental box (1) with a longitudinal width smaller than the longitudinal width of the experimental box (1). A transparent observation plate (3) that tilts backward and upward is provided between the top of the experimental box (1) near the front and the bottom of the box opening (2). The box body composed of the experimental box (1), the box opening (2) and the transparent observation plate (3) is an integrated structure with only the top of the box opening (2) open. The experimental box (1) has a horizontally fixed crossbar (5) for placing the pre-film test piece (4) inside. The top of the box opening (2) is hinged to a box cover (6). A movable buckle (7) is also provided between the box opening (2) and the box cover (6). A sealing strip (8) is embedded in the top of the box opening (2). The top of the box cover (6) is provided with a perforation (9), and a pressure balancer (10) is fixed at the top of the box cover (6) corresponding to the position of the perforation (9). The top and bottom of the pressure balancer (10) are provided with through holes (11) corresponding to the positions of the perforation (9). A diaphragm (12) is horizontally fixed inside the pressure balancer (10), and an air hole (13) is provided in the center of the diaphragm (12).

2. The pre-filming acceptance test apparatus for a circulating cooling water system according to claim 1, characterized in that: The longitudinal width of the opening (2) of the box does not exceed half of the longitudinal width of the experimental box (1).

3. The pre-filming acceptance test apparatus for a circulating cooling water system according to claim 1, characterized in that: The experimental box (1), the box opening (2) and the transparent observation plate (3) are a single transparent box.

4. The pre-filming acceptance test apparatus for a circulating cooling water system according to claim 1, characterized in that: The angle of the transparent observation plate (3) is 10°-30°.

5. The pre-filming acceptance test apparatus for a circulating cooling water system according to claim 1, characterized in that: The bottom of the experimental box (1) is fixed with external suction cups (14) facing downwards at the four corners.

6. The pre-filming acceptance test apparatus for a circulating cooling water system according to claim 1, characterized in that: The crossbar (5) is fixed with an internal fixing suction cup (15) at the bottom of the pre-film test piece (4) near the four corners. The suction cup of the internal fixing suction cup (15) is facing upward to adsorb the pre-film test piece (4).

7. The pre-filming acceptance test apparatus for a circulating cooling water system according to claim 1, characterized in that: The box cover (6) is a cone shape with an upward protrusion at the top center, and the air pressure balancer (10) is located at the top center of the box cover (6).

8. The pre-filming acceptance test apparatus for a circulating cooling water system according to claim 1, characterized in that: The pressure balancer (10) is a hollow cylindrical shape, and the diaphragm (12) is a circular elastic rubber pad.

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