Foam quality evaluation method

Abstract

The invention provides a foam quality evaluation method, which comprises the following steps of: acquiring data before testing, and acquiring the time required by a cleaning solution pot for completing a standard evaluation area and the mixing ratio of cleaning solution and water flowing through a high-pressure spray gun; a dynamic test and operation control box controls a high-pressure spray gun to realize a sequence of actions through a displacement assembly, meanwhile, the high-pressure spray gun sprays foam to an evaluation plate, and the luminosity of a light-transmitting window, namely the foam concentration, is measured through a luminosity measuring instrument; recording the sagging time of the foam on the evaluation plate; calculating the foam retention rate after the sagging is completed; and carrying out balance calculation to obtain an evaluation value of the foam quality. According to the method, subjective judgment that visual foam concentration is replaced by a scientific luminosity value is proposed for the first time, and meanwhile, a constant evaluation standard is carried out according to foam sagging time, foam retention rate, constant speed and constant times.

Description

Technical Field

[0001] This invention relates to the field of foam quality technology, and more specifically to a method for assessing the quality of foam. Background Technology

[0002] A foam sprayer is a device that uses high-pressure water to mix and dilute chemical cleaning solutions and then spray out foam.

[0003] Currently, there is no unified evaluation method for the performance of foam pitchers on the market, and different manufacturers give different evaluation results for their products. Furthermore, the evaluation results are highly subjective, making more scientific testing and evaluation impossible. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a foam quality assessment method that evaluates and compares the performance of high-speed sprayed foam to understand the true quality level of various foam sprayers.

[0005] The objective of this invention can be achieved through the following technical solution: a foam quality assessment method, the method being based on a foam testing device, the testing device comprising a frame support and a high-pressure spray gun, a control box mounted on one end of the frame support, a test support mounted on the other end and a mounting plate fixed at the bottom, a displacement assembly for mounting and moving the high-pressure spray gun mounted on the top of the frame support, a nozzle at the front end of the high-pressure spray gun and a detachable and replaceable cleaning liquid container connected to its end, a foam collection box placed on the mounting plate, an evaluation board mounted on the test support and positioned directly above the foam collection box, a light box mounted on the test support on the back of the evaluation board, and a light-transmitting window opened on the side of the light box closest to the evaluation board;

[0006] The method includes the following steps:

[0007] Data collection was conducted before the test, and the time required for the cleaning fluid reservoir to complete a standard test area and the mixing ratio of cleaning fluid and water flowing through the high-pressure spray gun were obtained.

[0008] Dynamic test: The operation control box controls the high-pressure spray gun to achieve a reciprocating motion through the displacement component. At the same time, the high-pressure spray gun sprays foam onto the evaluation board. The photometric meter measures the photometric value of the light-transmitting window, i.e., the foam concentration.

[0009] Record the time it takes for the foam to drip onto the evaluation board;

[0010] Calculate the foam retention rate after the sag is completed;

[0011] The foam quality assessment value is obtained by balancing the time required for the cleaning liquid reservoir to complete a standard test area, the mixing ratio of cleaning liquid and water flowing through the high-pressure spray gun, the light intensity of the light-transmitting window, the drip time, and the foam retention rate.

[0012] Before the data acquisition in the step of testing, the current environmental parameters are also collected.

[0013] The environmental parameters include temperature and humidity information.

[0014] The data collection prior to the test includes:

[0015] To obtain the actual water flow rate of the high-pressure spray gun: After the high-pressure spray gun has been running for a predetermined running time of 2 minutes or after the flow count value has stabilized, the actual water flow rate Q of the high-pressure spray gun under this operating condition is measured with a flow meter; the high-pressure spray gun is connected to an external high-pressure cleaner, the high-pressure cleaner is connected to a water source through an inlet pipe, and the flow meter is connected to the inlet pipe.

[0016] To determine the flow rate of the cleaning solution pitcher: Fill the cleaning solution pitcher with foam cleaning solution and use an electronic scale to measure the maximum weight (Max W) of the cleaning solution in the pitcher. in After running the machine for the predetermined test duration, use an electronic scale to measure the current weight of the cleaning fluid reservoir (Min Win); and then measure the weight using the Max W. in -Min W in The flow rate of the cleaning solution container was calculated based on the test duration;

[0017] Obtain the actual area of ​​the evaluation board.

[0018] The time required for the cleaning solution container to complete one standard test area is:

[0019] T 24 =24 / (tan(θ / 180*π / 2)*X*2*S)

[0020] Where θ is the maximum adjustable spray angle of the cleaning fluid reservoir, X is the distance between the cleaning fluid reservoir and the test board, and S is the moving speed of the cleaning fluid reservoir.

[0021] The distance X between the cleaning liquid container and the evaluation board is set to 1m, and the moving speed S of the cleaning liquid container is set to 0.5m / s.

[0022] The mixing ratio of the cleaning fluid and water flowing through the high-pressure spray gun is as follows:

[0023]

[0024] Among them, Max W in The weight of the cleaning solution in the container before testing is expressed in grams; Min Win The value is the weight of the cleaning fluid in the cleaning fluid reservoir after the test, in grams; Q is the actual water flow rate of the high-pressure spray gun, in liters per minute, obtained through a flow meter.

[0025] The drip time is the time required from the start of one reciprocating motion of the high-pressure spray gun to the point where the foam falling from the test board no longer has a foamy appearance.

[0026] The foam retention rate is:

[0027]

[0028] Wherein, H1 is the foam height in the foam collection box measured immediately after the foaming process is completed, and H2 is the foam height measured after the foam has been left to stand in the foam collection box for a predetermined time.

[0029] The quality assessment value of the foam is:

[0030]

[0031] Where T is the sag time, T 24 The time required for the cleaning solution container to complete a standard test area. For foam retention rate, The ratio of cleaning fluid to water flowing through the high-pressure spray gun is denoted by LUX, which represents the light intensity of the light-transmitting window.

[0032] Compared with the prior art, the advantages of this application are:

[0033] 1. This invention evaluates and compares the performance of high-speed sprayed foam to understand the true quality level of various foam sprayers. The foam testing equipment is mainly used to collect / measure / record various performance parameters of foam under set working conditions, and obtain the overall performance rating through final calculation, making the evaluation results more objective and fair.

[0034] 2. This invention is the first to propose using scientific photometric values ​​to replace the subjective judgment of foam concentration by visual observation, while using constant evaluation standards such as foam flow time, foam retention rate, and constant speed and frequency. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the foam testing device used in the method of the present invention;

[0036] Figure 2 This is a side view of the foam testing device;

[0037] Figure 3 This is a schematic diagram of the evaluation board;

[0038] Figure 4 This is a schematic diagram of the light-transmitting window of the lightbox;

[0039] Figure 5 This is a schematic diagram of the displacement component;

[0040] Figure 6 This is a schematic diagram of the displacement component from another perspective;

[0041] Figure 7 This is a flowchart of a method according to an embodiment of the present invention.

[0042] In the diagram, 1. Frame support; 11. Casters; 2. Operation control box; 3. Test support; 31. Evaluation board; 32. Limiting and fixing plate; 33. Foam collection box; 331. Handle; 34. Foam base plate; 35. Mounting plate; 36. Replacement port; 4. Light box; 41. Light-transmitting window; 5. Displacement component; 51. Longitudinal guide rail; 52. First guide seat; 53. Second guide seat; 531. Locking device; 54. Vertical guide rail; 541. Triangular bracket; 55. Third guide seat; 56. Lateral drive guide rail; 561. Drive motor; 562. Slide table; 563. Mounting seat; 564. High-pressure spray gun; 565. Clamping seat; 566. Tightening head; 567. Clamping part; 7. Cleaning fluid bottle. Detailed Implementation

[0043] The following are specific embodiments of the present invention, which, together with the accompanying drawings, will further describe the technical solution of the present invention.

[0044] like Figure 1-6 As shown, the foam testing device used in this invention includes a frame support 1 and a high-pressure spray gun 564. A control box 2 is mounted at one end of the frame support 1, and a test support 3 is mounted at the other end, with a mounting plate 35 fixed to the bottom. A displacement assembly 5 for mounting and moving the high-pressure spray gun 564 is mounted above the frame support 1. The front end of the high-pressure spray gun 564 is a nozzle, and its end is connected to a detachable and replaceable cleaning liquid container 7. A foam collection box 33 is placed on the mounting plate 35. A test plate 31 is mounted on the test support 3, and the test plate 31 is located directly above the foam collection box 33. A light box 4 is mounted on the test support 3 behind the test plate 31. The nozzle of the high-pressure spray gun 564 is aligned with the test plate 31. In this application, the test plate 31 can be made of transparent acrylic, metal plates with metal accents, wood, textured tiles, or glossy tiles, etc. A light-transmitting window 41 is provided on the side of the light box 4 closest to the test plate 31. The light box 4 has a built-in D65 standard light source, and the inside is completely black. It has a light-transmitting window 41 in the direction of the evaluation board 31. The light-transmitting window 41 can transmit light and is in a relatively sealed state with the internal light source, so that liquid will not enter the light box 4. After the foam is sprayed on the evaluation board 31, the LUX photometric value is read by a photometer as the foam concentration data.

[0045] The upper end of the test plate 31 is connected to a limiting fixing plate 32, which fixes it to the test bracket 3. The lower end of the test plate 31 is connected to a foam base plate 34, which allows foam to flow smoothly into the foam collection box 33. The test plate 31 is used to collect data information (i.e., foam). It is fixed to the test bracket 3 by the limiting fixing plate 32, which provides support and locking function to determine the test position. The foam collection box 33 is used to collect the slipped foam. The foam collection box 33 is placed on the mounting plate 35, and the mounting plate 35 can be made of corrosion-resistant and rust-proof material and provides support for the foam collection box 33.

[0046] The frame support 1 is equipped with casters 11 at its four corners. The displacement assembly 5 includes a clamping fixture, a longitudinal guide rail 51, a vertical guide rail 54, and a transverse drive guide rail 56. There are two longitudinal guide rails 51, which are symmetrically fixed on both sides of the frame support 1. A first guide seat 52 is slidably connected to the longitudinal guide rail 51, and a second guide seat 53 is slidably connected to the first guide seat 52. The vertical guide rail 54 is vertically fixed to the second guide seat 53, and a triangular bracket 541 providing stability is provided between the vertical guide rail 54 and the second guide seat 53. A third guide seat 55 is slidably connected to the vertical guide rail 54, and the transverse drive guide rail 56 is fixed to the third guide seat 55. A drive motor 561, which plays a driving role and is controlled and connected to the operation control box 2, is fixed at one end of the transverse drive guide rail 56. A slide table 562 is slidably connected to the transverse drive guide rail 56, and the clamping fixture is installed on the slide table 562. The transverse drive guide rail 56 is driven by the drive motor 561 to move the slide table 562 on it. At the same time, it can achieve constant speed and constant frequency movement through the automatic control box 2.

[0047] The clamping fixture includes clamping seats 565 arranged side by side and a tightening head 566 threaded through the clamping seats 565. A mounting base 563 is fixed on the slide table 562, and the clamping seats 565 are mounted on the mounting base 563. The clamping seats 565 have a clamping part 567 in the middle for clamping a high-pressure spray gun 564. The tightening head 566 can rotate inward to clamp the high-pressure spray gun 564. A locking device 531 is connected between the longitudinal guide rail 51 and the first guide seat 52, the first guide seat 52 and the second guide seat 53, and the vertical guide rail 54 and the third guide seat 55 to secure them. Each guide rail is equipped with a locking device 531 for locking after adjustment to the desired position.

[0048] The frame support 1 has a replacement port 36 for replacing the foam collection box 33, and the foam collection box 33 has a handle 331. The replacement port 36 allows the foam collection box 33 to be replaced when it is full so that subsequent testing can continue.

[0049] like Figure 7 As shown, the method of the present invention includes the following steps:

[0050] Before the test begins, environmental parameters, including temperature (°C) and humidity (%), should be recorded for later test evaluation.

[0051] The following preparations need to be collected before testing:

[0052] Equipment Connection and Preparation Stage: Connect the high-pressure spray gun 564 and the target test cleaning fluid reservoir 7. The cleaning fluid reservoir 7 contains foam cleaning fluid. Connect the high-pressure spray gun 564 to an external high-pressure washer. The high-pressure washer is connected to a water source (tap water or a water tank) via a water inlet pipe. A flow meter for reading the water flow is installed on the water inlet pipe. The high-pressure spray gun 564 acts as the switch for the high-pressure washer. Adjust the nozzle of the high-pressure spray gun 564 to a distance of 1m from the test board 31, and then turn on the high-pressure spray gun 564. The 1m distance is the standard setting in this embodiment, i.e., the mandatory test distance required by the equipment. All products are placed at the same distance. This distance is mainly based on the fact that in actual operation, the nozzle and the object being cleaned are usually 1m apart. If it is too close, the foam will splash onto the operator; if it is too far, the foam may not reach the test board surface. Adjust the spray angle of the high-pressure spray gun 564 to its maximum capability angle θ, and measure the actual maximum foam angle.

[0053] Data acquisition phase: Obtain the actual water flow rate of the high-pressure spray gun, the flow rate of the cleaning fluid can, and the actual area of ​​the evaluation board.

[0054] After running the high-pressure spray gun 564 for 2 minutes or until the flow count stabilizes, measure the actual water flow rate Q (L / min) of the high-pressure spray gun under this operating condition using a flow meter. This is the flow rate of the high-pressure washer itself, excluding the flow rate of the cleaning fluid reservoir 7. Then, turn off the high-pressure spray gun 564. Conventional flow meters require a break-in period for the flow rate to stabilize, which is generally 2 minutes (i.e., the running time set in this embodiment). After that, directly read the flow rate value.

[0055] Fill the foam cleaning solution into the cleaning solution bottle 7, and use an electronic scale to measure the maximum weight (W) of the cleaning solution in the bottle 7. in (Unit: g). After running the machine for 1 minute, use an electronic scale to measure the current weight of cleaning fluid reservoir 7 and record the Min Win (unit: g). (Max W) in -Min W in The flow rate of the cleaning solution container is calculated based on the test duration, and the unit is g / min. Here, one minute is obtained by weighing to determine the flow rate per unit time. The test duration can also be set to 3 minutes or other times. Then, the total flow rate measured is divided by this 3 or other time to obtain the flow rate per minute. The only difference is the method of flow rate measurement.

[0056] Measure the actual area of ​​the evaluation board 31 and record M m.2 M should, in principle, be less than or equal to the standard test area of ​​24m². 2 .

[0057] Based on the above settings, the time T required for the cleaning solution container 7 to complete one standard test area can be obtained. 24 The calculation method is as follows:

[0058] T 24 =24 / (tan(θ / 180*π / 2)*X*2*S)

[0059] θ: The adjustable maximum spray angle of the foam pot;

[0060] X: Distance from the foam pot spray test panel, which is 1m in this embodiment;

[0061] S: The moving speed being tested, which is 0.5 m / s in this embodiment.

[0062] The above information also provides the mixing ratio of cleaning solution and water. (%), a smaller mixing ratio indicates less chemical cleaning solution is used and less environmental impact, calculated as follows:

[0063]

[0064] Max W in : Weight of cleaning solution (g) before testing;

[0065] Min W in : Weight of cleaning solution (g) after testing;

[0066] Q: Actual water flow rate (L / min) of the high-pressure spray gun.

[0067] After completing the above preparations, the dynamic test will begin. Connect the high-pressure spray gun 564 and the target test cleaning fluid reservoir 7, which contains foam cleaning fluid. Ensure the system is in a working state and connect a water source. Adjust the nozzle of the high-pressure spray gun 564 to a distance of 1 meter from the test plate 31, and then turn on the high-pressure spray gun 564. Activate the motion control box 2 to spray foam onto the test plate 31. The high-pressure spray gun 564 will start running and return to its original position, repeating once. Then, the motion control box 2 will automatically stop the movement of the high-pressure spray gun 564. At this point, a photometer needs to be used to measure the photometric value of the light-transmitting window 41 and record it as LUX. The lower the photometric value, the higher the foam concentration, indicating a better effect on the stain. The photometric value LUX is used as the foam concentration value.

[0068] After the equipment stops running, a stopwatch is used to record the foam dripping time T on the evaluation plate 31. The dripping is complete when the foam falling from the evaluation plate 31 no longer has a foamy shape. This time process is called the foam dripping time T. The longer the dripping time, the longer the foam and the stain interact, and the better the cleaning effect.

[0069] After the foam has settled, the foam height in the foam collection box 33 is measured using a steel ruler, and the initial value H1 (in cm) is recorded. The foam is left to stand in the foam collection box for a predetermined time, and then the foam height H2 (in cm) is measured again. The predetermined time can be set by the user and should be the same for multiple tests in the same evaluation. In this embodiment, the predetermined time is 5 minutes, which allows for a clear comparison of the foam's changes. If the time is too short, the foam height change will be small, requiring higher measurement accuracy; if the time is too long, the foam height difference will also be small, similarly affecting the test accuracy. However, 3 to 7 minutes is more in line with actual conditions.

[0070] Foam retention rate within 5 minutes (Unit: %) can be calculated:

[0071]

[0072] A higher foam retention rate indicates a more effective interaction between the foam and the stain. When foam is left still in a space, it continuously breaks down, reducing its volume. The effective foam retention efficiency can be determined by measuring the change in the height of the foam inside the measuring chamber before and after 5 minutes. Better foam retention allows for a more effective stain removal reaction; a higher retention rate means a longer reaction time and better results.

[0073] The above tests reveal five of the most important properties of the foam: slough time T, LUX, T 24 , We performed a balanced calculation on these 5 attributes and finally obtained the following overall index for the bubble. The higher the overall score, the better the overall performance of the bubble.

[0074]

[0075] The above comprehensive evaluation weighs various attributes of the bubble, such as the duration of the bubble's flow (T). The better the bubble's ability to create a bubble, the larger the T value. 24 A higher value indicates that cleaning of a standard area of ​​24m² has been completed. 2 The longer the time, the lower the cleaning rate; The higher the foam retention rate, the better the foam cleaning effect; The higher the mixing ratio of water and cleaning solution, the higher the consumption of cleaning solutions, and the greater the cost and environmental impact. The higher the LUX value, the higher the light transmittance, which means lower foam concentration and worse cleaning effect.

[0076] The technical solutions of the present invention described above provide solutions that are significantly different from those of the prior art, addressing the problem that existing technical solutions are too simplistic. The parts not covered in this application are the same as or can be implemented using existing technologies, and will not be described in detail here.

[0077] The technical solutions in the above embodiments have clearly and completely described the content of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A method for assessing the quality of foam, characterized in that, The method is based on a foam testing device, which includes a frame support and a high-pressure spray gun. A control box is installed at one end of the frame support, and a test support is installed at the other end with a mounting plate fixed at the bottom. A displacement component for installing and moving the high-pressure spray gun is installed on the top of the frame support. The front end of the high-pressure spray gun is a nozzle, and its end is connected to a detachable and replaceable cleaning liquid tank. A foam collection box is placed on the mounting plate. An evaluation board is installed on the test support and is located directly above the foam collection box. A light box is installed on the test support on the back of the evaluation board, and a light-transmitting window is opened on the side of the light box closest to the evaluation board. The method includes the following steps: Data collection was conducted before the test, and the time required for the cleaning fluid reservoir to complete a standard test area and the mixing ratio of cleaning fluid and water flowing through the high-pressure spray gun were obtained. Dynamic test: The operation control box controls the high-pressure spray gun to achieve a reciprocating motion through the displacement component. At the same time, the high-pressure spray gun sprays foam onto the evaluation board. The photometric meter measures the photometric value of the light-transmitting window, i.e., the foam concentration. Record the time it takes for the foam to drip onto the evaluation board; Calculate the foam retention rate after the sag is completed; The foam quality assessment value is obtained by balancing the time required for the cleaning liquid reservoir to complete a standard test area, the mixing ratio of cleaning liquid and water flowing through the high-pressure spray gun, the light intensity of the light-transmitting window, the drip time, and the foam retention rate.

2. The foam quality assessment method according to claim 1, characterized in that: Before the data acquisition in the step of testing, the current environmental parameters are also collected.

3. The foam quality assessment method according to claim 2, characterized in that: The environmental parameters include temperature and humidity information.

4. The foam quality assessment method according to claim 1, characterized in that: The data collection prior to the test includes: To obtain the actual water flow rate of the high-pressure spray gun: After the high-pressure spray gun has been running for a predetermined running time of 2 minutes or after the flow count value has stabilized, the actual water flow rate Q of the high-pressure spray gun under this operating condition is measured with a flow meter; the high-pressure spray gun is connected to an external high-pressure cleaner, the high-pressure cleaner is connected to a water source through an inlet pipe, and the flow meter is connected to the inlet pipe. To determine the flow rate of the cleaning solution pitcher: Fill the cleaning solution pitcher with foam cleaning solution and use an electronic scale to measure the maximum weight (Max W) of the cleaning solution in the pitcher. in After running the machine for the predetermined test duration, use an electronic scale to measure the current weight of the cleaning fluid reservoir (Min Win); and then measure the weight using the Max W. in -Min W in The flow rate of the cleaning solution container was calculated based on the test duration; Obtain the actual area of ​​the evaluation board.

5. The foam quality assessment method according to claim 1, characterized in that: The time required for the cleaning solution container to complete one standard test area is: T 24 =24 / (tan(θ / 180*π / 2)*X*2*S) Where θ is the maximum adjustable spray angle of the cleaning fluid reservoir, X is the distance between the cleaning fluid reservoir and the test board, and S is the moving speed of the cleaning fluid reservoir.

6. The foam quality assessment method according to claim 5, characterized in that: The distance X between the cleaning liquid container and the evaluation board is set to 1m, and the moving speed S of the cleaning liquid container is set to 0.5m / s.

7. The foam quality assessment method according to claim 1, characterized in that: The mixing ratio of the cleaning fluid and water flowing through the high-pressure spray gun is as follows: Among them, Max W in The weight of the cleaning solution in the container before testing is expressed in grams; Min W in The value is the weight of the cleaning fluid in the cleaning fluid reservoir after the test, in grams; Q is the actual water flow rate of the high-pressure spray gun, in liters per minute, obtained through a flow meter.

8. The foam quality assessment method according to claim 1, characterized in that: The drip time is the time required from the start of one reciprocating motion of the high-pressure spray gun to the point where the foam falling from the test board no longer has a foamy appearance.

9. The foam quality assessment method according to claim 1, characterized in that: The foam retention rate is: Wherein, H1 is the foam height in the foam collection box measured immediately after the foaming process is completed, and H2 is the foam height measured after the foam has been left to stand in the foam collection box for a predetermined time.

10. The foam quality assessment method according to claim 1, characterized in that: The quality assessment value of the foam is: Where T is the sag time, T 24 The time required for the cleaning solution container to complete a standard test area. For foam retention rate, The ratio of cleaning fluid to water flowing through the high-pressure spray gun is denoted by LUX, which represents the light intensity of the light-transmitting window.

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