Method for detecting gas generation amount and gas generation rate of low-temperature foaming agent

Abstract

The invention provides a method for detecting the gas generation amount and gas generation rate of a low-temperature foaming agent, which comprises the following steps: introducing inert gas into a gas generation structure through a gas inlet structure, completely discharging air in the gas generation structure, then adding water at a proper temperature into the gas generation structure, and carrying out heat preservation on the water through a heat preservation structure; the foaming agent is fed into the gas generation structure through the feeding structure, weighing is carried out through the weighing structure in the gas generation structure, the gas generation amount is measured through the measuring structure, and the gas generation rate is calculated according to the measuring time and the gas amount. In the gas forming process, inert gas is continuously introduced through the gas inlet structure at a constant flow speed. According to the method for detecting the gas generation amount and the gas generation rate of the low-temperature foaming agent, measurement can be conducted through weighing, exhausted gas can be collected for direct measurement, the device is more flexible to use, the application range of the device is expanded, detection results can be compared, and the detection accuracy is improved. Therefore, the detection accuracy of the gas generation amount and the gas generation efficiency is improved.

Description

Technical Field

[0001] This disclosure relates to the field of foaming agent gas emission detection technology, and in particular to a method for detecting the gas emission amount and gas emission rate of low-temperature foaming agents. Background Technology

[0002] The detection of gas evolution volume and gas evolution rate of low-temperature foaming agents is a core technical means to evaluate their foaming performance, which directly determines the molding quality, pore structure, mechanical properties and application adaptability of foamed materials.

[0003] Most existing foaming agents measure gas evolution by weighing or by exhaust. Weighing calculates gas evolution by assessing the change in the foaming agent's weight before and after the process, but it only measures the amount of gas evolution and cannot directly measure the changing gas evolution rate, which can affect the accuracy of the test results. While exhaust measurement provides better results, changes in gas pressure during the measurement process can affect the gas evolution temperature and introduce errors. Furthermore, external gases can influence the foaming agent during the gas evolution process. Summary of the Invention

[0004] This disclosure aims to at least partially address one of the technical problems in the related art.

[0005] Therefore, the purpose of this disclosure is to provide a method for detecting the gas evolution amount and gas evolution rate of low-temperature foaming agents.

[0006] To achieve the above objectives, this disclosure provides a method for detecting the gas evolution quantity and rate of low-temperature foaming agents, comprising: S1. Inert gas is introduced into the gas generating structure through the air intake structure to completely expel the air in the gas generating structure. Then, water at a suitable temperature is added into the gas generating structure and the water is kept warm through the heat insulation structure. S2. The foaming agent is fed into the gas generating structure through the feeding structure, weighed by the weighing structure inside the gas generating structure, and the gas generating amount is measured by the measuring structure. The gas generating rate is calculated based on the measurement time and the amount of gas. S3. During the gas generation process, inert gas is continuously and constantly introduced through the air intake structure, and the flow rate of the inert gas is measured through the auxiliary air intake structure. The flow rate of the blown gas is measured through the measuring structure. The change in weight before and after the weighing structure and the change in the volume of the measuring structure minus the amount of inert gas are all the gas generation volume. The gas generation volume per unit time is the gas generation rate. S4. Compare the gas generation results obtained from weighing and exhaust measurements to ensure the accuracy of the experiment; The gas generating structure of S1 includes an outer barrel structure and an inner barrel structure. An insulation structure is installed inside the outer barrel structure to heat and insulate the inner barrel structure. The inner barrel structure is used to generate the foaming agent. A weighing structure is installed inside the inner barrel structure to weigh the foaming agent. An air inlet structure is connected to the inner barrel structure, and an auxiliary air inlet structure is located inside the inner barrel structure and corresponds to the air inlet structure. The measuring structure in S2 is equipped with a sealing structure and a connecting structure. After sealing the inner barrel structure with the sealing structure, warm water is added, allowing the inner barrel structure to be completely immersed in water for water bath heating to improve the insulation effect. The connecting structure discharges the gas and inert gas generated by the foamer into the measuring structure, which measures the amount of gas.

[0007] Optionally, the outer barrel structure includes: a testing box, on which an inlet pipe and an outlet pipe are fixed, both connected to the testing box; the insulation structure includes multiple heating pipes fixed inside the testing box wall, and a feed pipe slidably fitted onto the testing box, corresponding to the feed structure; wherein, valves are installed on both the inlet and outlet pipes, and warm water is added to the testing box through the inlet pipe. When the inner barrel structure is completely sealed, the water level overflows the inner barrel structure to insulate it.

[0008] Optionally, the measuring structure includes: a measuring box, which is fixedly connected to a detection box; an outlet pipe is fixed to one side of the measuring box; an electric valve is installed on the outlet pipe; a space adjustment structure is installed inside the measuring box; the measuring box is connected to the inner barrel structure through a connecting structure; a pressure detection structure and a position detection structure are installed inside the measuring box; the position detection structure corresponds to the space adjustment structure. The space adjustment structure adjusts the size of the gas collection space inside the detection box according to the gas generation volume, thereby ensuring the accuracy of gas generation collection. The gas generation efficiency can be judged based on the moving speed of the space adjustment structure. Furthermore, after gas generation is completed, gas can be extracted through the outlet pipe to prevent pressure changes from affecting the balance.

[0009] Optionally, the space adjustment structure includes: a sealing plate; multiple slide rails are fixed inside the measuring box, and the slide rails are slidably connected to the sealing plate; a first groove is provided inside the measuring box; a pressure detection structure includes a first pressure sensor and a second pressure sensor fixed inside the measuring box, the first pressure sensor and the second pressure sensor being located on opposite sides of the sealing plate; and a position detection structure includes a distance sensor fixed inside the measuring box. The distance sensor detects the position of the sealing plate to determine the gas output, and the gas output efficiency can be calculated by the displacement change of the sealing plate over a certain period of time. When gas is discharged, the sealing plate slides to the outermost side, at which point gas is discharged to the outside through the first groove and the gas outlet pipe. A gas passage is provided inside the measuring box, and the gas passage corresponds to the connecting structure.

[0010] Optionally, the connecting structure includes: a connecting pipe, which is fixedly connected to the measuring box; a sealing structure including a pressure plate, which corresponds to the inner barrel structure; the pressure plate is fixedly connected to the measuring box through the connecting pipe; an exhaust port is provided inside the pressure plate and is connected to the connecting pipe; the pressure plate corresponds to the feeding structure; and a pressure plate is fixed on the lower side of the pressure plate. A first plug is installed inside the connecting pipe; an electric cylinder is fixed inside the air passage; a pull rod is fixed at the output end of the electric cylinder; the pull rod is slidably connected to the first plug; and a first spring is fixed between the pull rod and the first plug. A sealing ring is fixed on the lower side of the pressure plate, which corresponds to the inner barrel structure; solid lubricating oil is applied to the circumference of the sealing ring to ensure sealing while reducing friction with the inner barrel structure, preventing the impact on balancing, and providing an oil seal effect. Activating the electric cylinder drives the first plug to slide up and down, controlling the first plug to block the connecting pipe, thereby changing the method of measuring the gas output.

[0011] Optionally, the inner barrel structure includes an outer barrel and an inner barrel; wherein, multiple support legs are fixed to the lower side of the outer barrel, the support legs are fixed inside the detection box, the inner barrel is located inside the outer barrel, the sealing ring is in contact with the inner wall of the inner barrel, and the weighing structure includes a weighing device fixed to the bottom inside the outer barrel, and the inner barrel is placed on the weighing device; wherein, the inner barrel is weighed by the weighing device, and the amount of gas generated is detected based on the weight change before and after gas generation.

[0012] Optionally, the feeding structure includes: a feeding pipe, which is fixedly connected to a pressure plate; a slot is provided at the end of the feeding pipe, corresponding to the feeding pipe; a blocking plate is installed inside the feeding pipe; a rotating shaft is installed between the blocking plate and the feeding pipe, which is rotatably connected to the feeding pipe; a torsion spring is installed between the rotating shaft and the feeding pipe; and a push rod is fixed at one end of the feeding pipe. When feeding, the feeding pipe is pushed, causing it to insert into the slot. Simultaneously, the push rod pushes the blocking plate to rotate, thus connecting the feeding pipe and the feeding pipe, allowing foaming agent to be added through both. Furthermore, with the feeding pipe positioned within the slot, a short-distance sliding motion of the feeding pipe resets the blocking plate, blocking the feeding pipe and sealing both the feeding pipe and the feeding pipe.

[0013] Optionally, the air intake structure includes an air intake pipe, which is fixedly connected to the detection box and communicates with the inner barrel; wherein, inert gas is introduced into the inner barrel through the air intake pipe.

[0014] Optionally, the auxiliary air intake structure includes: an air intake channel, a connecting port between the air intake channel and the air intake pipe, a second plug installed in the connecting port, a plurality of second springs fixed between the second plug and the inner wall of the air intake channel, and a fourth air pressure sensor fixed on the lower side of the second plug; wherein, when the air intake pipe is blocked, a larger air pressure pushes the second plug upward, and assists air intake through the air intake channel.

[0015] Optionally, the auxiliary air intake structure further includes a blocking plate. A second groove is provided inside the inner barrel, and an electromagnet is fixed in the second groove. The second groove is slidably connected to the blocking plate, and the electromagnet corresponds to the blocking plate. Multiple third springs are fixed between the blocking plate and the second groove. When air is intaked through the air intake pipe, the electromagnet is energized, causing it to attract the blocking plate. The blocking plate slides downward and no longer blocks the air intake pipe, allowing air to enter through the pipe. When the air intake pipe is blocked, the electromagnet is de-energized, causing the third springs to rebound and push the blocking plate upward, allowing the blocking plate to scrape and clean the end of the air intake pipe.

[0016] The technical solution provided in this disclosure may include the following beneficial effects: 1. Through the weighing and measuring structures, the device can not only measure by weighing, but also collect and measure the exhaust gas directly, making the device more flexible to use and expanding its application range. Furthermore, during the measurement process, both can be performed simultaneously, allowing for comparison of the test results and thus improving the accuracy of gas generation and efficiency testing.

[0017] 2. The inner tank can be sealed by a pressure plate, allowing the constant-temperature water to overflow the inner tank, thus ensuring uniform heating of the water bath and guaranteeing the gas generation effect. It can also collect the gas emitted by the foaming agent more completely, thereby improving the accuracy of the measurement. Furthermore, during the measurement process, the capacity can be adjusted in real time according to the actual situation, thus preventing the increase of gas pressure in the inner tank from affecting the weighing and gas generation, and improving the accuracy of the test.

[0018] 3. It can completely seal during the gas generation process and prevent the foaming agent from coming into contact with air during the gas intake, thus preventing the foaming agent reaction from affecting subsequent gas generation tests. It can also continuously introduce inert gas to blow out the gas during the gas generation process and ensure the inert gas intake effect after the air intake pipe is blocked by the expansion of the foaming agent.

[0019] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which: Figure 1 This is a schematic diagram of the assembled three-dimensional structure of the detection box and the measuring box in a method for detecting the gas evolution amount and gas evolution rate of a low-temperature foaming agent according to an embodiment of the present disclosure. Figure 2 This is a schematic cross-sectional view of the assembly structure of the detection box and the measuring box in a method for detecting the gas evolution amount and gas evolution rate of a low-temperature foaming agent according to an embodiment of the present disclosure. Figure 3 yes Figure 2 A schematic diagram at point A in the middle; Figure 4 yes Figure 2 A schematic diagram at point B in the middle; Figure 5 yes Figure 2 A schematic diagram at point C in the middle; Figure 6 This is a schematic diagram of the assembly structure of the measuring box and pressure plate in a method for detecting the gas evolution amount and gas evolution rate of a low-temperature foaming agent according to an embodiment of this disclosure; Figure 7 This is an exploded view of the detection box and measuring box in a method for detecting the gas evolution amount and gas evolution rate of a low-temperature foaming agent according to an embodiment of this disclosure; Figure 8 This is a schematic diagram of the assembly structure of the detection box, outer barrel, and inner barrel in a method for detecting the gas evolution amount and gas evolution rate of a low-temperature foaming agent according to an embodiment of the present disclosure. Figure 9 This is a schematic diagram of the assembly cross-sectional structure of the outer and inner barrels in a method for detecting the gas evolution amount and gas evolution rate of a low-temperature foaming agent according to an embodiment of this disclosure. Figure 10 This is a schematic diagram of the assembly cross-sectional structure of the inner barrel and the air inlet channel in a method for detecting the gas generation and gas generation rate of a low-temperature foaming agent according to an embodiment of this disclosure. As shown in the figure: 101, detection box; 102, water inlet pipe; 103, water outlet pipe; 104, heating pipe; 105, feed pipe; 106, blocking plate; 107, rotating shaft; 108, slot; 201. Measuring box; 202. Air outlet pipe; 203. Sealing plate; 204. Slide rail; 205. First groove; 206. Electric valve; 301. First barometric pressure sensor; 302. Second barometric pressure sensor; 303. Third barometric pressure sensor; 304. Distance sensor; 305. Fourth barometric pressure sensor; 401. Air passage; 402. Connecting pipe; 403. Electric cylinder; 404. First plug; 405. Pull rod; 406. First spring; 501. Pressure plate; 502. Exhaust port; 503. Sealing ring; 601. Outer drum; 602. Inner drum; 603. Weighing device; 604. Support leg; 701. Feed pipe; 702. Push rod; 801. Intake passage; 802. Intake pipe; 803. Connecting port; 804. Second plug; 805. Second spring; 901, Second groove; 902, Blocking plate; 903, Electromagnet; 904, Third spring. Detailed Implementation

[0021] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are used only to explain this disclosure, and should not be construed as limiting this disclosure. Rather, embodiments of this disclosure include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0022] like Figures 1 to 10 As shown in the embodiments of this disclosure, a method for detecting the gas evolution quantity and gas evolution rate of low-temperature foaming agents is proposed, including: S1. Inert gas is introduced into the gas generating structure through the air intake structure to completely expel the air in the gas generating structure. Then, water at a suitable temperature is added into the gas generating structure and the water is kept warm through the heat insulation structure. S2. The foaming agent is fed into the gas generating structure through the feeding structure, weighed by the weighing structure inside the gas generating structure, and the gas generating amount is measured by the measuring structure. The gas generating rate is calculated based on the measurement time and the amount of gas. S3. During the gas generation process, inert gas is continuously and constantly introduced through the air intake structure, and the flow rate of the inert gas is measured through the auxiliary air intake structure. The flow rate of the blown gas is measured through the measuring structure. The change in weight before and after the weighing structure and the change in the volume of the measuring structure minus the amount of inert gas are all the gas generation volume. The gas generation volume per unit time is the gas generation rate. S4. Compare the gas generation results obtained from weighing and exhaust measurements to ensure the accuracy of the experiment; The gas generating structure of S1 includes an outer barrel structure and an inner barrel structure. An insulation structure is installed inside the outer barrel structure to heat and insulate the inner barrel structure. The inner barrel structure is used to generate the foaming agent. A weighing structure is installed inside the inner barrel structure to weigh the foaming agent. An air inlet structure is connected to the inner barrel structure, and an auxiliary air inlet structure is located inside the inner barrel structure and corresponds to the air inlet structure. The measuring structure in S2 is equipped with a sealing structure and a connecting structure. After sealing the inner barrel structure with the sealing structure, warm water is added, allowing the inner barrel structure to be completely immersed in water for water bath heating to improve the insulation effect. The connecting structure discharges the gas and inert gas generated by the foamer into the measuring structure, which measures the amount of gas.

[0023] In this embodiment, the outer barrel structure includes: a testing box 101, on which an inlet pipe 102 and an outlet pipe 103 are fixed, both connected to the testing box 101; the insulation structure includes multiple heating pipes 104, which are fixed inside the wall of the testing box 101, and a feed pipe 105 is slidably fitted on the testing box 101, corresponding to the feed structure; wherein, valves are installed on both the inlet pipe 102 and the outlet pipe 103, and warm water is added to the testing box 101 through the inlet pipe 102. When the inner barrel structure is completely sealed, the water level overflows the inner barrel structure to insulate it.

[0024] Specifically, water can be added to the testing chamber 101 through the inlet pipe 102 and the outlet pipe 103, with water added from both sides. Before adding the foaming agent to the inner barrel 602, warm water is added to the testing chamber 101 through the inlet pipe 102 to preheat the inner barrel 602. After adding the foaming agent, the inner barrel 602 is in a sealed state. The second addition of water to the testing chamber 101 allows the warm water to overflow the inner barrel 602, thus providing a water bath heating effect on the periphery of the inner barrel 602, improving the constant temperature effect. Furthermore, during the foaming agent's gas generation process, the temperature can be controlled by heating through the heating pipe 104, thereby achieving a better constant temperature effect, ensuring the effective gas generation of the foaming agent, and improving the accuracy of detecting the amount and efficiency of the foaming agent's gas generation.

[0025] The measuring structure includes: a measuring box 201, which is fixedly connected to a detection box 101. An outlet pipe 202 is fixed to one side of the measuring box 201, and an electric valve 206 is installed on the outlet pipe 202. A space adjustment structure is installed inside the measuring box 201. The measuring box 201 is connected to an inner barrel structure via a connecting structure. A pressure detection structure and a position detection structure are installed inside the measuring box 201, with the position detection structure corresponding to the space adjustment structure. The space adjustment structure adjusts the size of the gas collection space inside the detection box 101 according to the gas generation volume, thereby ensuring the accuracy of gas generation collection. The gas generation efficiency can be judged based on the movement speed of the space adjustment structure. After gas generation is completed, air can be extracted through the outlet pipe 202 to prevent pressure changes from affecting the balance. The space adjustment structure includes: a sealing plate 203, which is fixed inside the measuring box 201. Multiple slide rails 204 are fixed, and the slide rails 204 are slidably connected to the sealing plate 203. A first groove 205 is opened in the measuring box 201. The air pressure detection structure includes a first air pressure sensor 301 and a second air pressure sensor 302 fixed in the measuring box 201. The first air pressure sensor 301 and the second air pressure sensor 302 are respectively located on both sides of the sealing plate 203. The position detection structure includes a distance sensor 304 fixed in the measuring box 201. The distance sensor 304 detects the position of the sealing plate 203 to determine the gas output, and the gas output efficiency can be calculated by the displacement change of the sealing plate 203 within a certain period of time. When the gas is discharged, the sealing plate 203 slides to the outermost side, and at this time the gas is discharged to the outside through the first groove 205 and the gas outlet pipe 202. An air passage 401 is opened in the measuring box 201, and the air passage 401 corresponds to the connecting structure.

[0026] Specifically, the gas emitted by the foaming agent enters the measuring chamber 201 through the connecting pipe 402. The gas passes through the gas channel 401 and pushes the sealing plate 203 to slide under air pressure. The sealing plate 203 slides along the slide rail 204. The pressure changes at both ends can be detected by the first air pressure sensor 301 and the second air pressure sensor 302. An external air pump can be added. The air pump actively draws air through the air outlet pipe 202 to drive the sealing plate 203 to slide. At this time, the sealing plate 203 acts as a piston, thereby extracting the gas emitted by the foaming agent and preventing the gas from remaining in the inner barrel 602, which would increase the air pressure and affect the gas generation. This improves the accuracy of detecting the amount and efficiency of the foaming agent's gas generation.

[0027] When gas is generated, the gas pushes the sealing plate 203 to slide. Active evacuation keeps the gas pressure inside the inner tank 602 constant, preventing pressure increases that could affect the foaming agent's gas generation. The gas enters the measuring box 201 through the connecting pipe 402 and the gas passage 401, pushing the sealing plate 203 to slide. The position of the sealing plate 203 can be monitored by the distance sensor 304. By measuring the distance the sealing plate 203 moves within a fixed time, the amount of gas generated can be calculated, allowing for real-time monitoring. The gas generation efficiency is displayed intuitively, ensuring the accuracy of the gas generation efficiency test results. After the sealing plate 203 moves a certain distance, the volume of the increased space on one side of the sealing plate 203 minus the amount of inert gas that enters is the gas generation volume, making the test results intuitively displayed. The gas generation volume and efficiency can be checked in real time, thereby improving the test effect. Furthermore, when the gas pressure inside the inner barrel 602 remains constant, the contents of the inner barrel 602 can be weighed to perform the test. The two methods can be compared to ensure the accuracy of the test results.

[0028] The connecting structure includes: a connecting pipe 402, which is fixedly connected to the measuring box 201; a sealing structure including a pressure plate 501, which corresponds to the inner barrel structure; the pressure plate 501 is fixedly connected to the measuring box 201 through the connecting pipe 402; an exhaust port 502 is provided inside the pressure plate 501, which is connected to the connecting pipe 402; the pressure plate 501 corresponds to the feeding structure; and a pressure plate 501 is fixed to the lower side of the pressure plate 501. A first plug 404 is installed inside the connecting pipe 402; an electric cylinder 403 is fixed inside the air passage 401; and a pull rod 405 is fixed to the output end of the electric cylinder 403. The pull rod 405 is slidably connected to the first plug 404, and a first spring 406 is fixed between the pull rod 405 and the first plug 404; wherein, a sealing ring 503 is fixed on the lower side of the pressure plate 501, the sealing ring 503 corresponds to the inner barrel structure, and the periphery of the sealing ring 503 is coated with solid lubricating oil to ensure sealing while reducing friction with the inner barrel structure, preventing the impact of symmetrical weight, and also playing an oil sealing role; wherein, the electric cylinder 403 is activated, which drives the first plug 404 to slide up and down, controlling the first plug 404 to block the connecting pipe 402, thereby changing the way the gas output is measured.

[0029] Specifically, the connecting pipe 402 can be blocked, or the gas can be controlled to be discharged under a certain pressure by changing the position of the first plug 404. At this time, the electric cylinder 403 is activated, which drives the first plug 404 to move through the pull rod 405. This allows the first plug 404 to block the connecting pipe 402, but it is not completely unable to move. When the gas pressure in the inner barrel 602 increases, the larger gas pressure can push the first plug 404 upward, compressing the first spring 406. Thus, the first plug 404 loses its blocking effect on the connecting pipe 402. When the gas pressure is balanced, the first spring 406 rebounds, causing the first plug 404 to reset, allowing for continued blocking. This makes the device more flexible to use and expands its application range.

[0030] The testing box 101 and the measuring box 201 are fixedly connected by means of snap-fit, bolt, magnetic attraction, etc. When installed on the measuring box 201, the measuring box 201 will move the pressure plate 501 downwards. The pressure plate 501 is limited by the outer barrel 601. At the same time, the sealing ring 503 contacts the inner wall of the inner barrel 602, which can achieve a good sealing effect, thereby preventing air leakage, water ingress, etc. during the foaming agent gasification process, ensuring the accuracy of the experimental results, and reducing experimental errors.

[0031] The inner barrel structure includes an outer barrel 601 and an inner barrel 602. Multiple support legs 604 are fixed to the lower side of the outer barrel 601 and are fixed inside the detection box 101. The inner barrel 602 is located inside the outer barrel 601, and a sealing ring 503 contacts the inner wall of the inner barrel 602. The weighing structure includes a weighing device 603 fixed to the bottom inside the outer barrel 601, and the inner barrel 602 is placed on the weighing device 603. The inner barrel 602 is weighed using the weighing device 603, and the amount of gas generated is detected based on the weight change before and after gas generation.

[0032] Specifically, after the outer barrel 601 is sealed by the pressure plate 501, the entire periphery of the outer barrel 601 can come into contact with warm water, thereby achieving a good water bath heating effect, ensuring the uniformity of heating, and the weight of the inner barrel 602 can be weighed in real time by the weighing device 603, thereby achieving a good weighing detection effect.

[0033] The feeding structure includes: a feeding pipe 701, which is fixedly connected to a pressure plate 501; a slot 108 is provided at the end of a feeding pipe 105, corresponding to the feeding pipe 701; a blocking plate 106 is installed inside the feeding pipe 105; a rotating shaft 107 is installed between the blocking plate 106 and the feeding pipe 105, and the rotating shaft 107 is rotatably connected to the feeding pipe 105; a torsion spring is installed between the rotating shaft 107 and the feeding pipe 105; and a push rod 702 is fixed at one end of the feeding pipe 701; wherein, when... During feeding, the feed pipe 105 is pushed so that the discharge pipe 701 is inserted into the slot 108. At the same time, the push rod 702 pushes the blocking plate 106 to rotate, thereby connecting the discharge pipe 701 and the feed pipe 105, and adding foaming agent through the discharge pipe 701 and the feed pipe 105. With the discharge pipe 701 in the slot 108, the feed pipe 105 is slid by a short distance, which can reset the blocking plate 106 to block the feed pipe 105, thereby sealing the discharge pipe 701 and the feed pipe 105.

[0034] Specifically, during feeding, the feed pipe 105 is pushed, causing the discharge pipe 701 to insert into the slot 108. At the same time, the push rod 702 pushes the blocking plate 106 to rotate, thus connecting the discharge pipe 701 and the feed pipe 105. At this time, the discharge pipe 701 and the feed pipe 105 are in a sealed state. To ensure the sealing effect, a sealing ring can be installed on the periphery of the discharge pipe 701 to prevent water leakage after the second addition of warm water. At this time, the foaming agent is added into the inner barrel 602 through the discharge pipe 701 and the feed pipe 105, which prevents the foaming agent from contacting the outside air, thereby preventing the foaming agent from absorbing air and reacting, and ensuring the accuracy of the foaming amount detection.

[0035] The air intake structure includes an air intake pipe 802, which is fixedly connected to the detection box 101 and communicates with the inner barrel 602. Inert gas is introduced into the inner barrel 602 through the air intake pipe 802. The auxiliary air intake structure includes an air intake channel 801, with a connecting port 803 between the air intake channel 801 and the air intake pipe 802. A second plug 804 is installed in the connecting port 803. Multiple second springs 805 are fixed between the second plug 804 and the inner wall of the air intake channel 801. A fourth pressure sensor 305 is fixed to the lower side of the second plug 804. When the air intake pipe 802 is blocked, a larger air pressure pushes the second plug 804 upwards, assisting air intake through the air intake channel 801. It also includes: a blocking plate 902, a second groove 901 is provided in the inner barrel 602, an electromagnet 903 is fixed in the second groove 901, the second groove 901 is slidably connected to the blocking plate 902, the electromagnet 903 corresponds to the blocking plate 902, and a plurality of third springs 904 are fixed between the blocking plate 902 and the second groove 901; wherein, when air is introduced through the air intake pipe 802, the electromagnet 903 is energized, causing the electromagnet 903 to attract the blocking plate 902, and the blocking plate 902 slides downward and no longer blocks the air intake pipe 802, so that air can be introduced through the air intake pipe 802; when the air intake pipe 802 is blocked, the electromagnet 903 is de-energized, causing the third springs 904 to rebound and push the blocking plate 902 upward, so that the end of the air intake pipe 802 can be scraped and cleaned through the blocking plate 902.

[0036] Specifically, when inert gas is introduced, it is introduced into the inner barrel 602 through the air inlet pipe 802, thereby blowing out the gas generated by the foaming agent in the inner barrel 602, facilitating gas collection. Furthermore, when the foaming agent releases gas, it may cause significant expansion. If the expansion of the foaming agent blocks the air inlet pipe 802, the inability to expel gas will increase the internal pressure. This will push up the second plug 804. The internal pressure of the air inlet pipe 802 can be detected by the fourth pressure sensor 305. The flow rate of the inert gas is detected based on the change in the fourth pressure sensor 305, facilitating the calculation of the total amount of inert gas introduced and ensuring the accuracy of the final gas emission measurement. After the second plug 804 is pushed up, the inert gas can enter the air inlet channel 801 and then into the inner barrel 602, ensuring a continuous supply of inert gas into the inner barrel 602, guaranteeing the discharge of the gas generated by the foaming agent, and reducing detection errors.

[0037] Workflow: Install the measuring box 201. The measuring box 201 will move the pressure plate 501 downwards, and the pressure plate 501 will be limited by the outer barrel 601. At the same time, the sealing ring 503 will contact the inner wall of the inner barrel 602, thus achieving a good sealing effect. Then, water is added to the testing box 101 through the water inlet pipe 102, and water is added from both sides. Before adding the foaming agent to the inner barrel 602, warm water is added to the testing box 101 through the water inlet pipe 102 to preheat the inner barrel 602. At this time, inert gas is introduced into the inner barrel 602 through the air inlet pipe 802. After the gas in the inner barrel 602 is completely discharged, push the feed pipe 105 so that the discharge pipe 701 is inserted into the slot 108. At the same time, the push rod 702 pushes the blocking plate 106 to rotate, thus achieving the desired sealing effect. The feed pipe 701 is now connected to the feed pipe 105, and the two are in a sealed state. Feeding is then performed through the feed pipe 701 and feed pipe 105. The first weighing is then conducted using the weighing device 603. After adding the foaming agent, the inner barrel 602 is sealed. Water is then added to the detection box 101, allowing warm water to overflow the inner barrel 602. This warm water provides a water bath to heat the periphery of the inner barrel 602, improving the temperature control and causing the foaming agent to begin gasification. During this gasification, the foaming agent may expand significantly. If the expansion of the foaming agent blocks the air inlet pipe 802, the inability to expel air will increase the internal pressure. This will push up the second plug 804, and... The air pressure inside the intake pipe 802 is detected by the fourth air pressure sensor 305. The flow rate of the inert gas is detected based on the change in the fourth air pressure sensor 305, which facilitates the calculation of the total amount of inert gas introduced, ensuring the accuracy of the final gas output. When the second plug 804 is pushed up, the inert gas can enter the intake channel 801 and then the inner barrel 602, ensuring a continuous supply of inert gas into the inner barrel 602. Then, the gas pushes up the first plug 404, compressing the first spring 406. At this point, the first plug 404 loses its blocking effect on the connecting pipe 402. When the air pressure is balanced, the first spring 406 rebounds, causing the first plug 404 to reset, allowing the blocking to continue. The gas enters the measuring box 201 through the connecting pipe 402 and the air passage 401, pushing the sealing plate 203. The sealing plate 203 slides along the slide rail 204, and the pressure changes at both ends can be detected by the first pressure sensor 301 and the second pressure sensor 302. An external air pump can be added, which actively draws air through the air outlet pipe 202, causing the sealing plate 203 to slide. At this time, the sealing plate 203 acts as a piston, thereby extracting the gas emitted by the foaming agent and preventing the gas from remaining in the inner barrel 602, which would cause the pressure to increase and affect the gas generation. When gas is being generated, the gas pushes the sealing plate 203 to slide, and the active extraction of air keeps the pressure in the inner barrel 602 constant, thereby preventing the pressure increase in the inner barrel 602 from affecting the gas generation of the foaming agent.Gas enters the measuring chamber 201 through the connecting pipe 402 and the gas passage 401, which pushes the sealing plate 203 to slide. The position of the sealing plate 203 can be monitored by the distance sensor 304. The amount of gas emitted can be calculated by the distance the sealing plate 203 moves within a fixed time, allowing for real-time monitoring of the gas emission efficiency. This provides a clear and intuitive view, ensuring the accuracy of the gas emission efficiency test results. Furthermore, the amount of gas emitted is calculated by subtracting the amount of inert gas entering from the increased space on one side of the sealing plate 203 after its movement. This provides a clear and intuitive display of the test results, allowing for real-time monitoring of both the gas emission amount and efficiency, thus improving the testing effect. Additionally, when the gas pressure inside the inner chamber 602 remains constant, the contents of the inner chamber 602 can be weighed for further testing. Comparing the two measurements ensures the accuracy of the test results.

[0038] In the description of this disclosure, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0039] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of preferred embodiments of this disclosure includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this disclosure pertain.

[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] Although embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A method for detecting the gas evolution amount and rate of low-temperature foaming agents, characterized in that, include: S1. Inert gas is introduced into the gas generating structure through the air intake structure to completely expel the air in the gas generating structure. Then, water at a suitable temperature is added into the gas generating structure and the water is kept warm through the heat insulation structure. S2. The foaming agent is fed into the gas generating structure through the feeding structure, weighed by the weighing structure inside the gas generating structure, and the gas generating amount is measured by the measuring structure. The gas generating rate is calculated based on the measurement time and the amount of gas. S3. During the gas generation process, inert gas is continuously and constantly introduced through the air intake structure, and the flow rate of the inert gas is measured through the auxiliary air intake structure. The flow rate of the blown gas is measured through the measuring structure. The change in weight before and after the weighing structure and the change in the volume of the measuring structure minus the amount of inert gas are all the gas generation volume. The gas generation volume per unit time is the gas generation rate. S4. Compare the gas generation results obtained from the weighing measurement and the exhaust measurement to obtain the final experimental results; The gas generating structure of S1 includes an outer barrel structure and an inner barrel structure. The heat insulation structure is installed inside the outer barrel structure and heats and insulates the inner barrel structure. The inner barrel structure is used to generate gas from the foaming agent. The weighing structure is installed inside the inner barrel structure and is used to weigh the foaming agent. The air inlet structure is connected to the inner barrel structure. The auxiliary air inlet structure is located inside the inner barrel structure and corresponds to the air inlet structure. The measuring structure in S2 is equipped with a sealing structure and a connecting structure. After the inner barrel structure is sealed by the sealing structure, warm water is added, which can completely immerse the inner barrel structure in water for water bath heating to improve the heat preservation effect. The gas and inert gas generated by the foamer are discharged into the measuring structure through the connecting structure, and the amount of gas is measured through the measuring structure.

2. The method for detecting the gas evolution amount and gas evolution rate of low-temperature foaming agents according to claim 1, characterized in that, The outer barrel structure includes: A testing box, on which an inlet pipe and an outlet pipe are fixed, and both the inlet pipe and the outlet pipe are connected to the testing box; The insulation structure includes multiple heating tubes, which are fixed inside the wall of the testing chamber. A feed pipe is slidably fitted onto the testing chamber, and the feed pipe corresponds to the feed structure. Valves are installed on both the inlet and outlet pipes. Warm water is added to the test chamber through the inlet pipe. After the inner tank structure is completely sealed, the water level overflows the inner tank structure to keep it warm.

3. The method for detecting the gas evolution amount and gas evolution rate of low-temperature foaming agents according to claim 2, characterized in that, The measurement structure includes: A measuring box is fixedly connected to a detection box. An air outlet pipe is fixed on one side of the measuring box, and an electric valve is installed on the air outlet pipe. A space adjustment structure is installed inside the measuring box. The measuring box is connected to the inner barrel structure through a connecting structure. An air pressure detection structure and a position detection structure are installed inside the measuring box. The position detection structure corresponds to the space adjustment structure. The space adjustment structure adjusts the size of the gas collection space inside the detection box according to the gas generation volume, thereby ensuring the accuracy of gas generation collection. The gas generation efficiency can be judged based on the moving speed of the space adjustment structure, and gas can be extracted through the gas outlet pipe after gas generation is completed.

4. The method for detecting the gas evolution amount and gas evolution rate of low-temperature foaming agents according to claim 3, characterized in that, The spatial adjustment structure includes: The sealing plate has multiple slide rails fixed inside the measuring box, which are slidably connected to the sealing plate. A first groove is provided inside the measuring box. The air pressure detection structure includes a first air pressure sensor and a second air pressure sensor fixed inside the measuring box. The first air pressure sensor and the second air pressure sensor are located on both sides of the sealing plate. The position detection structure includes a distance sensor fixed inside the measuring box. Among them, the position of the sealing plate is detected by the distance sensor to determine the gas output, and the gas output efficiency can be calculated by the displacement change of the sealing plate over a certain period of time. When the gas is discharged, the sealing plate slides to the outermost side, and at this time the gas is discharged to the outside through the first groove and the gas outlet pipe. The measuring box has a gas channel, which corresponds to the connecting structure.

5. The method for detecting the gas evolution amount and gas evolution rate of low-temperature foaming agents according to claim 4, characterized in that, The connectivity structure includes: A connecting pipe is fixedly connected to the measuring box. The sealing structure includes a pressure plate, which corresponds to the inner barrel structure. The pressure plate is fixedly connected to the measuring box through the connecting pipe. An exhaust port is opened in the pressure plate and is connected to the connecting pipe. The pressure plate corresponds to the feeding structure and a pressure plate is fixed on the lower side of the pressure plate. The connecting pipe is equipped with a first plug, an electric cylinder is fixed in the air passage, a pull rod is fixed at the output end of the electric cylinder, the pull rod is slidably connected to the first plug, and a first spring is fixed between the pull rod and the first plug. The pressure plate is fixed with a sealing ring on its lower side. The sealing ring corresponds to the inner barrel structure. Solid lubricating oil is applied to the periphery of the sealing ring to ensure sealing while reducing friction with the inner barrel structure. The lubricating oil can also be used for oil sealing. The electric cylinder is activated, which drives the first plug to slide up and down, thus controlling the first plug to block the connecting pipe.

6. The method for detecting the gas evolution amount and gas evolution rate of low-temperature foaming agents according to claim 5, characterized in that, The inner barrel structure includes: Outer drum, inner drum; The outer barrel has multiple support legs fixed to its lower side, which are fixed inside the detection box. The inner barrel is located inside the outer barrel, and the sealing ring is in contact with the inner wall of the inner barrel. The weighing structure includes a weighing device fixed to the bottom inside the outer barrel, and the inner barrel is placed on the weighing device. The inner tank is weighed using a weighing device, and the amount of gas generated is detected based on the weight change before and after gas generation.

7. The method for detecting the gas evolution amount and gas evolution rate of low-temperature foaming agents according to claim 6, characterized in that, The feeding structure includes: The feeding pipe is fixedly connected to the pressure plate. The end of the feeding pipe is provided with a slot, which corresponds to the feeding pipe. A blocking plate is installed inside the feeding pipe. A rotating shaft is installed between the blocking plate and the feeding pipe. The rotating shaft is rotatably connected to the feeding pipe. A torsion spring is installed between the rotating shaft and the feeding pipe. A push rod is fixed at one end of the feeding pipe. When feeding, the feed pipe is pushed so that the discharge pipe is inserted into the slot. At the same time, the push rod pushes the blocking plate to rotate, which realizes the connection between the discharge pipe and the feed pipe, so that the foaming agent can be added through the discharge pipe and the feed pipe. With the feed tube located inside the slot, a short-distance sliding of the feed tube can reset the blocking plate and block the feed tube, thereby sealing the feed tube and the feed tube.

8. The method for detecting the gas evolution amount and gas evolution rate of low-temperature foaming agents according to claim 6, characterized in that, The air intake structure includes: An air inlet pipe is fixedly connected to the detection box and is connected to the inner barrel. Inert gas is introduced into the inner barrel through the air inlet pipe.

9. The method for detecting the gas evolution amount and gas evolution rate of a low-temperature foaming agent according to claim 8, characterized in that, The auxiliary air intake structure includes: An air intake channel is provided, and a communication port is provided between the air intake channel and the air intake pipe. A second plug is installed in the communication port. Multiple second springs are fixed between the second plug and the inner wall of the air intake channel. A fourth air pressure sensor is fixed on the lower side of the second plug. When the intake pipe is blocked, the higher air pressure pushes the second plug upward, assisting air intake through the intake channel.

10. The method for detecting the gas evolution amount and gas evolution rate of a low-temperature foaming agent according to claim 8, characterized in that, The auxiliary air intake structure also includes: The inner barrel has a second groove, an electromagnet is fixed in the second groove, the second groove is slidably connected to the block plate, the electromagnet is corresponding to the block plate, and multiple third springs are fixed between the block plate and the second groove. When air is introduced through the intake pipe, the electromagnet is energized to attract the blocking plate. The blocking plate slides down and no longer blocks the intake pipe, allowing air to enter through the intake pipe. When the air intake pipe is blocked, the electromagnet is de-energized, causing the third spring to rebound and push the blockage plate upward, which can then scrape and clean the end of the air intake pipe through the blockage plate.

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