Fireproof check valve reliability detection device

Abstract

The utility model discloses a fireproof check valve reliability detection device, which relates to the fireproof check valve detection technical field and comprises a fixed station, an installation mechanism is arranged in the middle of the upper side of the fixed station, an air supply mechanism is arranged at the left part of the upper side of the fixed station, and a test mechanism is arranged at the right part of the upper side of the fixed station. The mounting mechanism comprises a fixing assembly, a liftable second fixing cylinder and a liftable first fixing cylinder, the second fixing cylinder is located on the left side of the first fixing cylinder, the air supply mechanism comprises a connecting assembly and an air pump, and the air pump communicates with the interior of the second fixing cylinder through the connecting assembly; by arranging the partition plate, the U-shaped pipe, the insertion rod, the pressure alarm and the floating ball, liquid level changes can be generated when the fireproof check valve leaks, the insertion rod triggers the pressure alarm to give an alarm, the leakage detection accuracy is higher through the liquid level changes, meanwhile, oil vapor adheres to the surface of the fireproof check valve, and the fireproof check valve leakage detection device has the advantages of being high in practicability and capable of improving the detection accuracy.

Description

Technical Field

[0001] This utility model relates to the field of fireproof check valve testing technology, specifically a fireproof check valve reliability testing device. Background Technology

[0002] Fire-resistant check valves are key equipment widely used in ventilation, smoke extraction, and duct systems. Their main function is to automatically close in case of fire or abnormal conditions to prevent the spread of fire and smoke along the ducts. The sealing performance of fire-resistant check valves is directly related to the fire safety inside buildings, making their reliability testing particularly important.

[0003] Existing fireproof check valve testing equipment typically employs static testing or simple sealing testing methods, relying on pressure testing in one direction or visual inspection for judgment. These testing methods cannot fully simulate the complex operating conditions of fireproof check valves in actual use, and are difficult to accurately reflect changes in the sealing performance of fireproof check valves after long-term operation. At the same time, due to environmental factors, airflow pressure fluctuations, and pipeline deformation, fireproof check valves may experience local sealing failures or aging problems, and traditional testing methods cannot effectively capture these details.

[0004] There is an existing fireproof check valve testing device for exhaust gas with the publication number CN222188696U. This device can observe the internal condition of the water tank through the display screen, and at the same time, it can amplify and release the sound of the bubbles emitted through the sound amplifier, which is helpful for personnel to judge the airtightness of the fireproof check valve. However, it cannot perform efficient testing under actual working conditions.

[0005] Therefore, it is necessary to design a fireproof check valve reliability testing device that is highly practical and can improve testing accuracy. Utility Model Content

[0006] The purpose of this invention is to provide a reliability testing device for fireproof check valves to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a fireproof check valve reliability testing device, including a fixed platform, an installation mechanism is provided in the upper middle part of the fixed platform, an air supply mechanism is provided in the upper left part of the fixed platform, and a testing mechanism is provided in the upper right part of the fixed platform.

[0008] The installation mechanism includes a fixing component, a liftable second fixing cylinder, and a first fixing cylinder, wherein the second fixing cylinder is located to the left of the first fixing cylinder;

[0009] The gas supply mechanism includes a connecting component and an air pump, and the air pump is connected to the interior of the second fixed cylinder through the connecting component.

[0010] The testing mechanism includes an oil drum and a testing component. The inside of the oil drum is connected to the inside of the first fixed cylinder through the testing component.

[0011] According to the above technical solution, the fixing component includes a first bracket, the lower side of which is fixedly connected to the upper surface of the fixing platform, a first slider slidably connected to the inner wall of the first bracket, the middle part of the first slider being fixedly connected to the outer wall of the first fixing cylinder, a threaded column rotatably connected to the upper side of the first slider via a bearing, the upper end of the threaded column penetrating the first bracket and extending to the upper side of the first bracket, the outer wall of the threaded column being threadedly connected to the inner wall of the first bracket, a rotating frame rotatably connected to the upper surface of the first bracket via a bearing, the inner wall of the rotating frame contacting the outer wall of the threaded column, a second bracket slidably connected to the left side of the upper surface of the fixing platform, a second slider slidably connected to the inner wall of the second bracket, and the inner wall of the second slider being fixedly connected to the outer wall of the second fixing cylinder.

[0012] According to the above technical solution, both the second fixed cylinder and the first fixed cylinder are tubular structures that run through the left and right sides, the threaded column is a hexagonal prism structure with threaded grooves on its surface, and the inner wall of the rotating frame is a hexagonal structure.

[0013] According to the above technical solution, the connecting assembly includes a first air pipe, one end of which is fixedly connected to the left side of the second fixed cylinder. A sealing box is fixedly connected to the rear left side of the upper surface of the fixed platform. Filter cotton is placed inside the sealing box. The right side of the sealing box is fixedly connected to one end of the first air pipe. A second air pipe is fixedly connected to the left side of the sealing box. The other end of the second air pipe is fixedly connected to one end of the air pump. The interior of the air pump is connected to the interior of the second fixed cylinder through the second air pipe, the sealing box, and the first air pipe.

[0014] According to the above technical solution, the detection component includes a partition located inside the oil drum, with the outer wall of the partition fixedly connected to the inner wall of the oil drum. A U-shaped tube is fixedly connected to the right side of the partition, with one end of the U-shaped tube extending through the lower side of the partition to the inner left side of the oil drum. A one-way valve is provided at the left end of the U-shaped tube, with the output side of the one-way valve being the upper side. The oil drum is filled with oil and water, with the oil and water levels higher than the left end of the U-shaped tube and lower than the right end of the U-shaped tube. The upper left side of the oil drum is a closed structure. A rod is slidably connected to the right side of the inner wall of the oil drum, with a float fixedly connected to the lower end of the rod. A pressure alarm is provided on the upper side of the rod, with the outer wall of the pressure alarm fixedly connected to the inner wall of the oil drum. The rod can move upward, and the pressure alarm is located on the moving path of the rod. A third air pipe is fixedly connected to the front left side of the oil drum.

[0015] According to the above technical solution, the partition divides the inside of the oil drum into two cavities, and the lower side of the partition does not contact the inner wall of the oil drum. The lower sides of the two cavities inside the oil drum are connected. The third air pipe is connected to the upper part of the left cavity of the oil drum. A one-way valve is installed inside the third air pipe, and the output side of the one-way valve inside the third air pipe faces the outside of the oil drum.

[0016] According to the above technical solution, a fourth gas pipe is fixedly connected to the left side of the oil drum. A high-temperature resistant one-way valve is fixedly connected to the inner wall of the fourth gas pipe. The output side of the high-temperature resistant one-way valve faces the outside of the oil drum. An insulation layer is fixedly connected to the outer wall of the fourth gas pipe near the oil drum. An electric heating tube is fixedly connected to the inner wall of the insulation layer. The left end of the U-shaped tube is lower than the right end of the fourth gas pipe, and the right end of the U-shaped tube is higher than the right end of the fourth gas pipe. An installation block is fixedly connected to the outer wall of the other end of the fourth gas pipe. The lower inner wall of the installation block is fixedly connected to the outer wall of one end of the third gas pipe. A groove is provided on the left side of the installation block. The inner wall of the groove contacts the outer wall of the first fixed cylinder. A fixing ring is fixedly connected to the outer wall of the first fixed cylinder. A motor is fixedly connected to the front and rear inner walls of the fixing ring. A transmission wheel is fixedly connected to the output end of the motor. The outer wall of the transmission wheel contacts the outer wall of the installation block.

[0017] Compared with the prior art, the beneficial effects achieved by this utility model are: by setting a first bracket and a liftable first fixed cylinder and a second fixed cylinder, this utility model can fix and adjust fireproof check valves of different sizes. By rotating the threaded column to adjust the height of the first fixed cylinder, the device can be adapted to fireproof check valves of different specifications.

[0018] By installing an air pump, a first air pipe, a sealing box, and a second air pipe, the gas inside the channel can be extracted to keep the fireproof check valve open. Then, air is injected into the channel to create positive pressure, which closes the fireproof check valve. The sealing performance of the fireproof check valve is tested by observing the sealing condition.

[0019] By incorporating a baffle, U-tube, insert rod, pressure alarm, and float, the system can generate a liquid level change when the fireproof check valve leaks, causing the insert rod to trigger the pressure alarm and sound an alarm. Utilizing liquid level changes to detect leaks provides higher accuracy. At the same time, oil and water vapor adhere to the surface of the fireproof check valve, further simulating actual working conditions and improving the realism of the detection.

[0020] By incorporating an insulation layer, heating element, motor, and drive wheel, the internal airflow of the channel can undergo alternating hot and cold circulation, accelerating the aging and solidification process of oil stains on the surface of the fireproof check valve, simulating the state after long-term use, thereby effectively evaluating the reliability of the fireproof check valve in extreme environments. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure on the right side of this utility model;

[0023] Figure 2 This is a schematic diagram of the left side structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the installation mechanism of this utility model;

[0025] Figure 4 This is a schematic diagram of the testing mechanism structure of this utility model;

[0026] Figure 5 This is a cross-sectional structural diagram of the testing mechanism of this utility model;

[0027] Figure 6 This is a schematic diagram of the gas supply mechanism of this utility model;

[0028] In the diagram: 1. Fixed platform; 2. Installation mechanism; 3. Air supply mechanism; 4. Testing mechanism; 201. First support; 202. First slider; 203. First fixed cylinder; 204. Threaded column; 205. Rotating frame; 206. Second support; 207. Second slider; 208. Second fixed cylinder; 301. First air pipe; 302. Sealing box; 303. Filter cotton; 304. Second air pipe; 305. Air pump; 401. Oil drum; 402. Partition plate; 403. U-shaped tube; 404. Float ball; 405. Insert rod; 406. Pressure alarm; 407. Third air pipe; 408. Fourth air pipe; 409. High-temperature resistant one-way valve; 410. Insulation layer; 411. Electric heating tube; 412. Mounting block; 413. Fixing ring; 414. Motor; 415. Transmission wheel. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-6The present invention provides a technical solution: a fireproof check valve reliability testing device, including a fixed platform 1, an installation mechanism 2 provided in the upper middle part of the fixed platform 1, an air supply mechanism 3 provided in the upper left part of the fixed platform 1, and a testing mechanism 4 provided in the upper right part of the fixed platform 1.

[0031] The mounting mechanism 2 includes a fixing component, a liftable second fixing cylinder 208, and a first fixing cylinder 203. The second fixing cylinder 208 is located to the left of the first fixing cylinder 203. The fixing component includes a first bracket 201. The lower side of the first bracket 201 is fixedly connected to the upper surface of the fixing platform 1. A first slider 202 is slidably connected to the inner wall of the first bracket 201. The middle part of the first slider 202 is fixedly connected to the outer wall of the first fixing cylinder 203. A threaded column 204 is rotatably connected to the upper side of the first slider 202 via a bearing. The upper end of the threaded column 204 passes through the first bracket 201 and extends to the upper side of the first bracket 201. The outer wall of 204 is threadedly connected to the inner wall of the first support 201. The upper surface of the first support 201 is rotatably connected to the rotating frame 205 via a bearing. The inner wall of the rotating frame 205 is in contact with the outer wall of the threaded column 204. The left side of the upper surface of the fixed platform 1 is slidably connected to the second support 206. The inner wall of the second support 206 is slidably connected to the second slider 207. The inner wall of the second slider 207 is fixedly connected to the outer wall of the second fixed cylinder 208. The second fixed cylinder 208 and the first fixed cylinder 203 are both tubular structures that run through the left and right sides. The threaded column 204 is a hexagonal prism structure with threaded grooves on its surface. The inner wall of the rotating frame 205 is a hexagonal structure.

[0032] In use, the fireproof check valve is fixed between the second fixed cylinder 208 and the first fixed cylinder 203, with the output side of the fireproof check valve facing left, so that the airflow can only move from right to left. The two ends of the fireproof check valve are fixed to the right side of the second fixed cylinder 208 and the left side of the first fixed cylinder 203, thus forming a complete channel between the second fixed cylinder 208, the fireproof check valve, and the first fixed cylinder 203. Since the second bracket 206 can slide left and right relative to the fixed platform 1, the second fixed cylinder 208 can slide relative to the second bracket 206. Furthermore, when the rotating frame 205 rotates, it can drive the threaded column 204 to rotate. The wall is threadedly connected to the inner wall of the first bracket 201. The height of the first fixed cylinder 203 can be adjusted by rotating the threaded column 204, so that the device can be adapted to various sizes of fireproof check valves. Since the first fixed cylinder 203 is supported by the threaded column 204, it can maintain a stable position on the first bracket 201. The second fixed cylinder 208 is slidably connected to the second bracket 206 through the second slider 207 and fixedly connected to one end of the fireproof check valve. It will generate downward pressure on one side of the fireproof check valve, so that the fireproof check valve can simulate the pressure generated by the pipeline being pressed downward by one end after long-term use during the test, and thus test the effect of deformation on sealing performance.

[0033] The air supply mechanism 3 includes a connecting assembly and an air pump 305. The air pump 305 is connected to the interior of the second fixed cylinder 208 through the connecting assembly. The connecting assembly includes a first air pipe 301. One end of the first air pipe 301 is fixedly connected to the left side of the second fixed cylinder 208. A sealing box 302 is fixedly connected to the rear left side of the upper surface of the fixed platform 1. A filter cotton 303 is placed inside the sealing box 302. The right side of the sealing box 302 is fixedly connected to one end of the first air pipe 301. A second air pipe 304 is fixedly connected to the left side of the sealing box 302. The other end of the second air pipe 304 is fixedly connected to one end of the air pump 305. The interior of the air pump 305 is connected to the interior of the second fixed cylinder 208 through the second air pipe 304, the sealing box 302, and the first air pipe 301.

[0034] After the device is fixed, the air pump 305 is started to extract air. The air inside the second fixed cylinder 208, the fireproof check valve, and the first fixed cylinder 203 can be extracted through the second air pipe 304, the sealing box 302, and the first air pipe 301, thereby keeping the fireproof check valve open. Finally, the air pump 305 supplies air into the second air pipe 304, thereby creating positive pressure inside the second fixed cylinder 208. At this time, the fireproof check valve is closed, and the sealing condition of the fireproof check valve can be observed.

[0035] The testing mechanism 4 includes an oil drum 401 and a testing component. The oil drum 401 is connected to the interior of the first fixed cylinder 203 via the testing component. The testing component includes a partition 402 located inside the oil drum 401, with its outer wall fixedly connected to the inner wall of the oil drum 401. A U-shaped tube 403 is fixedly connected to the right side of the partition 402. One end of the U-shaped tube 403 extends through the lower side of the partition 402 to the left side of the interior of the oil drum 401. A one-way valve is installed at the left end of the U-shaped tube 403, with the output side of the one-way valve facing upwards. The oil drum 401 is filled with oil and water, with the oil and water levels higher than the left end of the U-shaped tube 403 and lower than the right end. The upper left side of the oil drum 401 is a closed structure, and a rod is slidably connected to the right side of the inner wall of the oil drum 401. 405, a float ball 404 is fixedly connected to the lower end of the insertion rod 405, a pressure alarm 406 is provided on the upper side of the insertion rod 405, the outer wall of the pressure alarm 406 is fixedly connected to the inner wall of the oil drum 401, the insertion rod 405 can move upward, and the pressure alarm 406 is located on the moving path of the insertion rod 405, a third air pipe 407 is fixedly connected to the front left side of the oil drum 401, the partition 402 divides the inside of the oil drum 401 into two chambers, and the lower side of the partition 402 does not contact the inner wall of the oil drum 401. The lower sides of the left and right chambers inside the oil drum 401 are connected. The third air pipe 407 is connected to the upper part of the left chamber of the oil drum 401. A one-way valve is provided inside the third air pipe 407, and the output side of the one-way valve inside the third air pipe 407 faces the outside of the oil drum 401.

[0036] During the air pump 305's suction test, because the left end of the U-shaped tube 403 is closer to the liquid surface, the airflow enters the right end of the U-shaped tube 403 through the right side of the oil tank 401, and then exits through the left end of the U-shaped tube 403. During the airflow exit, it rises from the bottom of the liquid surface, carrying oil and water vapor upwards into the fourth air pipe 408. It then exits to the left through the first fixed cylinder 203 and the fireproof check valve. During this process, some oil and water vapor adheres to the surface of the fireproof check valve. When the airflow passes through the sealed box 302, the oil and water vapor contaminants in the airflow are filtered by the filter cotton 303, thus preventing damage to the air pump 305. During the air pump 305's exhaust test to perform a sealing test on the fireproof check valve... Since the right side of the fireproof check valve is connected to the left side of the inside of the oil drum 401 through the fourth gas pipe 408, and the oil drum 401 is located above the liquid surface, and a one-way valve is installed at the left end of the U-shaped pipe 403, if the fireproof check valve leaks, the liquid inside the oil drum 401 will flow to the right through the lower side of the partition 402, causing the liquid level on the right side of the partition 402 to rise. This will cause the float 404 to float up, driving the plug rod 405 to trigger the pressure alarm 406 to sound an alarm, thus achieving the effect of sealing the fireproof check valve. The accuracy is improved by the change in the sealing liquid level. In addition, during the test, a large amount of oil and water vapor adheres to the surface of the fireproof check valve, simulating the foreign matter that adheres to the surface during actual use, thereby increasing the simulation of the test.

[0037] A fourth air pipe 408 is fixedly connected to the left side of the oil drum 401. A high-temperature resistant one-way valve 409 is fixedly connected to the inner wall of the fourth air pipe 408. The output side of the high-temperature resistant one-way valve 409 faces the outside of the oil drum 401. An insulation layer 410 is fixedly connected to the outer wall of the fourth air pipe 408 near the oil drum 401. An electric heating element 411 is fixedly connected to the inner wall of the insulation layer 410. The left end of the U-shaped tube 403 is lower than the right end of the fourth air pipe 408, and the right end of the U-shaped tube 403 is higher than the right end of the fourth air pipe 408. The other end of 408 is fixedly connected to the outer wall of the mounting block 412. The lower inner wall of the mounting block 412 is fixedly connected to the outer wall of one end of the third air pipe 407. A groove is provided on the left side of the mounting block 412. The inner wall of the groove is in contact with the outer wall of the first fixed cylinder 203. A fixing ring 413 is fixedly connected to the outer wall of the first fixed cylinder 203. A motor 414 is fixedly connected to the front and rear inner walls of the fixing ring 413. A transmission wheel 415 is fixedly connected to the output end of the motor 414. The outer wall of the transmission wheel 415 is in contact with the outer wall of the mounting block 412.

[0038] During the use of this device, the motor 414 can be continuously started in both directions to achieve the effect of driving the transmission wheel 415 to rotate. Since the outer wall of the transmission wheel 415 is in contact with the outer wall of the mounting block 412, the mounting block 412 can be moved up and down during the rotation of the transmission wheel 415. At the same time, the electric heating tube 411 can heat the airflow passing through the high-temperature one-way valve 409, thereby causing the steam input at the right end of the first fixed cylinder 203 to change hot and cold continuously, accelerating the aging and solidification rate of the oil stains on the surface of the fireproof check valve, and increasing the aging speed of the fireproof check valve. This can simulate the working state of the fireproof check valve after long-term use and simulate working conditions at different temperatures, thereby improving the reliability of the test.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A reliability testing device for a fireproof check valve, comprising a fixed platform (1), wherein an installation mechanism (2) is provided on the upper center of the fixed platform (1), characterized in that: A gas supply mechanism (3) is provided on the upper left side of the fixed platform (1), and a testing mechanism (4) is provided on the upper right side of the fixed platform (1). The installation mechanism (2) includes a fixing component, a liftable second fixing cylinder (208), and a first fixing cylinder (203), wherein the second fixing cylinder (208) is located to the left of the first fixing cylinder (203); The gas supply mechanism (3) includes a connecting assembly and an air pump (305), wherein the air pump (305) is connected to the interior of the second fixed cylinder (208) through the connecting assembly; The testing mechanism (4) includes an oil drum (401) and a detection component. The inside of the oil drum (401) is connected to the inside of the first fixed cylinder (203) through the detection component.

2. The fireproof check valve reliability testing device according to claim 1, characterized in that: The fixing assembly includes a first bracket (201), the lower side of which is fixedly connected to the upper surface of the fixing platform (1). A first slider (202) is slidably connected to the inner wall of the first bracket (201). The middle part of the first slider (202) is fixedly connected to the outer wall of the first fixing cylinder (203). A threaded column (204) is rotatably connected to the upper side of the first slider (202) via a bearing. The upper end of the threaded column (204) passes through the first bracket (201) and extends to the upper side of the first bracket (201). The outer wall of the threaded column (204) is threadedly connected to the inner wall of the first bracket (201). The upper surface of the first bracket (201) is rotatably connected to a rotating frame (205) via a bearing. The inner wall of the rotating frame (205) is in contact with the outer wall of the threaded column (204). The left side of the upper surface of the fixed platform (1) is slidably connected to a second bracket (206). The inner wall of the second bracket (206) is slidably connected to a second slider (207). The inner wall of the second slider (207) is fixedly connected to the outer wall of the second fixed cylinder (208).

3. The fireproof check valve reliability testing device according to claim 2, characterized in that: The second fixed cylinder (208) and the first fixed cylinder (203) are both tubular structures that run through the left and right sides. The threaded column (204) is a hexagonal prism structure with threaded grooves on its surface. The inner wall of the rotating frame (205) is a hexagonal structure.

4. The fireproof check valve reliability testing device according to claim 3, characterized in that: The connecting assembly includes a first air pipe (301), one end of which is fixedly connected to the left side of the second fixed cylinder (208). A sealing box (302) is fixedly connected to the rear left side of the upper surface of the fixed platform (1). Filter cotton (303) is placed inside the sealing box (302). The right side of the sealing box (302) is fixedly connected to one end of the first air pipe (301). A second air pipe (304) is fixedly connected to the left side of the sealing box (302). The other end of the second air pipe (304) is fixedly connected to one end of the air pump (305). The interior of the air pump (305) is connected to the interior of the second fixed cylinder (208) through the second air pipe (304), the sealing box (302), and the first air pipe (301).

5. The fireproof check valve reliability testing device according to claim 4, characterized in that: The detection assembly includes a partition (402) located inside an oil drum (401), with the outer wall of the partition (402) fixedly connected to the inner wall of the oil drum (401). A U-shaped tube (403) is fixedly connected to the right side of the partition (402), with one end of the U-shaped tube (403) extending through the lower side of the partition (402) to the left side of the interior of the oil drum (401). A one-way valve is provided at the left end of the U-shaped tube (403), with the output side of the one-way valve being the upper side. The oil drum (401) is filled with oil and water, with the oil and water level higher than the left end of the U-shaped tube (403) and lower than the U-shaped tube (401). At the right end of the tube (403), the upper left side of the oil drum (401) is a closed structure. A rod (405) is slidably connected to the right side of the inner wall of the oil drum (401). A float (404) is fixedly connected to the lower end of the rod (405). A pressure alarm (406) is provided on the upper side of the rod (405). The outer wall of the pressure alarm (406) is fixedly connected to the inner wall of the oil drum (401). The rod (405) can move upward, and the pressure alarm (406) is located on the moving path of the rod (405). A third air pipe (407) is fixedly connected to the front left side of the oil drum (401).

6. The fireproof check valve reliability testing device according to claim 5, characterized in that: The partition (402) divides the interior of the oil drum (401) into two cavities, and the lower side of the partition (402) does not contact the inner wall of the oil drum (401). The lower sides of the two cavities inside the oil drum (401) are connected. The third air pipe (407) is connected to the upper part of the left cavity of the oil drum (401). A one-way valve is installed inside the third air pipe (407). The output side of the one-way valve inside the third air pipe (407) faces the outside of the oil drum (401).

7. The fireproof check valve reliability testing device according to claim 6, characterized in that: A fourth gas pipe (408) is fixedly connected to the left side of the oil drum (401). A high-temperature resistant one-way valve (409) is fixedly connected to the inner wall of the fourth gas pipe (408). The output side of the high-temperature resistant one-way valve (409) faces the outside of the oil drum (401). A heat insulation layer (410) is fixedly connected to the outer wall of the fourth gas pipe (408) near the oil drum (401). An electric heating element (411) is fixedly connected to the inner wall of the heat insulation layer (410). The left end of the U-shaped tube (403) is lower than the right end of the fourth gas pipe (408), and the right end of the U-shaped tube (403) is higher than the right end of the fourth gas pipe (408). An installation block (412) is fixedly connected to the outer wall of the other end of (408). The lower inner wall of the installation block (412) is fixedly connected to the outer wall of one end of the third air pipe (407). A groove is provided on the left side of the installation block (412). The inner wall of the groove is in contact with the outer wall of the first fixed cylinder (203). A fixing ring (413) is fixedly connected to the outer wall of the first fixed cylinder (203). A motor (414) is fixedly connected to the inner walls of the front and rear sides of the fixing ring (413). A transmission wheel (415) is fixedly connected to the output end of the motor (414). The outer wall of the transmission wheel (415) is in contact with the outer wall of the installation block (412).

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