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CN-121994992-A - Experimental device for simulating wall-hanging state of foam liquid and evaluation method

CN121994992ACN 121994992 ACN121994992 ACN 121994992ACN-121994992-A

Abstract

The invention provides an experimental device for simulating a wall-hanging state of foam liquid, which comprises an injection unit for providing the foam liquid, a guide cover, a test plate, a recovery barrel and an acquisition unit, wherein the test plate is obliquely arranged below the guide cover, and the recovery barrel is arranged below the test plate, and the acquisition unit is respectively connected with the injection unit and the recovery barrel. The collecting unit is configured to collect the output quantity of the foam liquid of the injecting unit, the residence time of the foam liquid on the test board and the recovery quantity of the foam liquid in the recovery barrel, so as to obtain the wall hanging performance of the foam liquid. In addition, an evaluation method for the foam liquid wall hanging performance is also provided.

Inventors

  • SHANG ZUZHENG
  • MOU XIAODONG
  • JIAO JINQING
  • LIU LINJIE
  • LANG XUQING

Assignees

  • 中国石油化工股份有限公司
  • 中石化安全工程研究院有限公司

Dates

Publication Date
20260508
Application Date
20241101

Claims (14)

  1. 1. An experimental set-up for simulating the wall built-up condition of a foam liquid, comprising: an injection unit (20) for providing a foam liquid, A guide cover (10) for receiving the foam liquid from the injection unit (20), A test plate (30) for receiving foam liquid from within the pod (10), the test plate being disposed obliquely below the pod (10), A recovery tank (40) arranged below the test board (30), and The collecting unit is respectively connected with the injection unit (20) and the recycling bin (40), Wherein the collection unit is configured to collect an output of the foaming liquid from the injection unit (20), a residence time of the foaming liquid on the test plate (30), and a recovery amount of the foaming liquid in the recovery tank (40), thereby obtaining a wall-hanging property of the foaming liquid.
  2. 2. Experimental device for simulating the wall-mounted condition of a foam bath according to claim 1, characterized in that the pod (10) is constructed in the form of a part sphere or a part cylinder or a part arc.
  3. 3. The experimental device for simulating a wall built-up state of a foam liquid according to claim 2, wherein the test board (30) comprises at least one of a stainless steel board, a wood board and a polytetrafluoroethylene board, and the roughness thereof is in the range of 0.1-6.0 um.
  4. 4. An experimental device for simulating the wall built-up state of a foam liquid according to claim 3, wherein the test plate (30) is selected from the group consisting of a plurality of test plates having different roughness.
  5. 5. The experimental device for simulating the state of a wall built up of a foam liquid according to claim 4, further comprising the support plate (31), and a number of fixtures arranged on the support plate (31), by means of which fixtures the test plate (30) is mounted on the support plate (31).
  6. 6. The experimental device for simulating a wall-mounted state of a foam bath according to claim 5, further comprising a first strut (11) and a second strut (32) extending in a vertical direction, wherein the pod (10) is fixedly connected to the first strut (11), and the support plate (31) is movably connected to the second strut (32) so as to allow the support plate (31) to rotate in a range of 0 ° to 89 °.
  7. 7. The experimental device for simulating a wall built-up state of a foam liquid according to claim 6, wherein the supporting plate (31) comprises a first supporting portion (311) and a second supporting portion (312) capable of partially extending into the recovery tank (40), wherein a sectional area of the second supporting portion (312) gradually decreases in a direction in which the foam liquid flows.
  8. 8. The experimental device for simulating a wall-built state of a foam liquid according to claim 7, wherein the first support portion (311) and the second support portion (312) each have a blocking portion for restricting a movement path of the foam liquid, which is provided in a direction perpendicular to the support plate (31).
  9. 9. The experimental device for simulating the state of a wall built up of a foam liquid according to claim 8, wherein the foam liquid is from an injection unit (20) comprising a foam liquid storage tank (21), a nozzle (22) extending in a horizontal direction from the foam liquid storage tank (21), and a foam generator (23) arranged within the nozzle (22).
  10. 10. The experimental device for simulating the state of a wall built up of a foam liquid according to claim 9, wherein the acquisition unit comprises a first meter (51) provided on the spout (22), a second meter (52) provided on the recovery tank (40), and a third meter for recording time.
  11. 11. A method for evaluating foam liquid wall-hanging performance, Wherein the foam liquid is ejected toward the pod by the injection unit of the experimental apparatus according to any one of claims 1 to 10, flows into the recovery tank through the test plate, The method comprises the steps of collecting the foam liquid output quantity of the injection unit (20), the residence time of the foam liquid on the test plate (30) and the recovery quantity of the foam liquid in the recovery barrel (40) through a collecting unit of the experimental device, so that the wall-hanging performance of the foam liquid is obtained.
  12. 12. The evaluation method according to claim 11, characterized in that the angle between the support plate (31) and the horizontal is adjusted so as to obtain the wall-hanging time of the foam liquid on the test plate (30) at different angles.
  13. 13. The evaluation method according to claim 11, characterized in that test plates of different roughness are exchanged, so that the wall-hanging time of the foam liquid on the test plate (30) at different roughness is obtained.
  14. 14. The evaluation method according to claim 11, wherein a wall-hanging time of the foam liquid on the test plate (30) when the recovery amount of the foam liquid in the recovery tank (40) and the output amount of the foam liquid of the injection unit (20) are different is measured.

Description

Experimental device for simulating wall-hanging state of foam liquid and evaluation method Technical Field The invention relates to the technical field of fire safety, in particular to an experimental device for simulating a wall hanging state of foam liquid and an evaluation method of the wall hanging performance of the foam liquid. Background In recent years, most of fires occur in the form of stereoscopic flames, such as crown fires, high-rise building outer wall fires, petrochemical industry device fires, and the like. Because the foam extinguishing agent has better viscosity compared with water. In addition, the foam generated by the foam extinguishing agent through the foam generator can be fully attached to the surface of a burning object, so that the fire extinguishing effect of effectively reducing temperature and isolating air can be achieved for a fire point. Therefore, in the serious fire accident and fire rescue process, the foam extinguishing agent is generally used as a main extinguishing means, and the foam liquid and the foam extinguishing agent are the same in the invention. At present, the quality of the foam extinguishing agent is evaluated and mainly depends on detection items in GB15308 foam extinguishing agent, wherein the detection items mainly comprise detection on the aspects of foaming multiple, liquid separation time, fire extinguishing time, burning resistance time and the like of foam liquid. However, it is difficult to perform a comprehensive detection of the foam liquid only by the above detection items. Accordingly, an apparatus for detecting a foaming liquid has been developed in the art to solve the above-mentioned problems. Disclosure of Invention The invention aims to provide an experimental device for simulating the wall-hanging state of foam liquid, which can test the wall-hanging performance of the foam liquid in various different states by taking three values of an included angle between a supporting plate and the horizontal direction, roughness (Ra) of a test plate and the ratio of the recovery amount and the injection amount of the foam liquid as variables. In addition, an evaluation method for the foam liquid wall hanging performance is also provided. According to a first aspect of the present invention, there is provided an experimental apparatus for simulating a wall built-up state of a foaming liquid, comprising an injection unit for providing the foaming liquid, A pod for receiving the foam liquid from the injection unit, A test plate for receiving foam liquid from the air guide sleeve, wherein the test plate is obliquely arranged below the air guide sleeve, A recycling bin disposed under the test plate, and The collecting unit is respectively connected with the injection unit and the recycling bin, The collecting unit is configured to collect the foam liquid output of the injecting unit, the residence time of the foam liquid on the test board and the recovery amount of the foam liquid in the recovery barrel, so as to obtain the wall hanging performance of the foam liquid. In one embodiment, the pod is configured in the form of a partial sphere or partial cylinder or partial arc. In one embodiment, the test board comprises at least one of a stainless steel board, a wood board and a polytetrafluoroethylene board, and the roughness of the test board is in the range of 0.1-6.0 um. In one embodiment, the test plate is selected from the group consisting of a plurality of test plates having different roughnesses. In one embodiment, the experimental device further comprises the support plate, and a plurality of fixing members arranged on the support plate, through which the test plate is mounted on the support plate. In one embodiment, the experimental device further comprises a first support column and a second support column extending in a vertical direction, wherein the pod is fixedly connected with the first support column, and the support plate is movably connected with the second support column, thereby allowing the support plate to rotate in a range of 0 ° to 89 °. In one embodiment, the support plate includes a first support portion and a second support portion capable of partially extending into the recovery tank, wherein a cross-sectional area of the second support portion gradually decreases in a direction in which the foam liquid flows. In one embodiment, the first and second support portions each have a blocking portion provided in a direction perpendicular to the support plate for restricting a movement path of the foam liquid. In one embodiment, the foaming liquid is from an injection unit comprising a foaming liquid storage tank, a spray pipe extending from the foaming liquid storage tank in a horizontal direction, and a foam generator arranged in the spray pipe. In one embodiment, the collection unit includes a first meter disposed on the spout, a second meter disposed on the recovery tank, and a third meter for recording time. According to a second