A fire sprinkler seal detection device

Abstract

This invention discloses a fire sprinkler head sealing performance testing device, comprising a testing platform, a placement mechanism, a ventilation mechanism, and a sealing mechanism. Two sets of placement mechanisms are slidably mounted on the testing platform. A fixed frame is provided on the testing platform. The sealing mechanism and the ventilation mechanism are respectively mounted vertically on the fixed frame and the testing platform. A driving assembly is provided on the testing platform to drive the two sets of placement mechanisms to slide horizontally in the same direction, allowing one set of placement mechanisms to slide between the sealing mechanism and the ventilation mechanism. The placement mechanism includes a placement plate and pulleys. This invention determines the sealing performance of the fire sprinkler head by introducing carbon dioxide gas and detecting the amount of carbon dioxide penetration using an infrared sensor. Fire sprinklers with poor sealing performance are marked. Multiple fire sprinklers can be tested simultaneously. The device is convenient, simple to operate, and has high testing efficiency.

Description

Technical Field

[0001] This invention discloses a fire sprinkler head sealing performance testing device, belonging to the field of sealing performance testing technology. Background Technology

[0002] Fire sprinkler heads are used in fire sprinkler systems and are classified into pendant sprinkler heads, upright sprinkler heads, standard sprinkler heads, sidewall sprinkler heads, etc. Figure 1 As shown, the main structure of a fire sprinkler head includes a sprinkler body 4, a plug 3, a glass bulb 2, and a sprinkler 1. The sprinkler 1 is fixed to the sprinkler body 4 with bolts. One end of the bolt abuts against the glass bulb 2, allowing the plug 3 to seal the sprinkler body 4. When a fire occurs, the glass bulb 2 ruptures automatically after reaching a predetermined temperature range, causing the plug 3 to fall off. Water or flame-retardant gas in the pipe flows out through the sprinkler body 4 and is then diffused by the sprinkler 1 to achieve the fire extinguishing effect. After the fire sprinkler head is manufactured, the sealing performance between the sprinkler body 4 and the plug 3 needs to be tested. Existing testing devices require manually fixing a single fire sprinkler head and then passing water at a certain pressure through one end of the fire sprinkler head. The quality of the fire sprinkler head's sealing performance is judged by observing the water leakage effect. This method is not only cumbersome but also inefficient. Furthermore, using water for testing results in waste and affects the cleanliness of the testing device. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art and to provide a fire sprinkler head sealing test device.

[0004] This invention achieves the above-mentioned objective through the following technical solution: a fire sprinkler head sealing performance testing device, comprising a testing platform, a placement mechanism, a ventilation mechanism, and a sealing mechanism. Two sets of placement mechanisms are slidably mounted on the testing platform. A fixed frame is provided on the testing platform. The sealing mechanism and the ventilation mechanism are respectively mounted vertically on the fixed frame and the testing platform. A driving assembly is provided on the testing platform. The driving assembly is used to drive the two sets of placement mechanisms to slide horizontally in the same direction, allowing one set of placement mechanisms to slide between the sealing mechanism and the ventilation mechanism. The placement mechanism includes a placement plate and pulleys. The placement plate has multiple grooves for installing fire sprinklers. The pulleys are rotatably mounted on the bottom of the placement plate. The ventilation mechanism includes a first movable plate, a first power component, an air inlet pipe, and an air guide pipe. The first power component is mounted on the testing platform. On the testing platform, a first movable plate is used to vertically raise and lower. The first movable plate is provided with an air guiding channel. The number of air guiding pipes is the same as the number of grooves, and one end of the air guiding pipe and the air inlet pipe is connected to the air guiding channel. The sealing mechanism includes a second movable plate, a sealing cylinder, an infrared sensor, a marking component, and a second power component. The second power component is mounted on a fixed frame and is used to vertically raise and lower the second movable plate. Multiple sealing cylinders are provided and mounted on the fixed frame. When the sealing cylinder abuts against the placement plate, it forms a sealed space on the outside of one end of the fire sprinkler. The infrared sensor is mounted on the sealing cylinder and is used to detect the concentration of carbon dioxide in the sealed space. The marking component is mounted on the sealing cylinder and marks the surface of the fire sprinkler when the carbon dioxide concentration in the sealed space exceeds a preset value.

[0005] Preferably, the marking assembly includes a sliding rod, a first spring, an identifier, a movable clip, and an electromagnetic induction element. A fixed base is installed on the sealing cylinder. The sliding rod is vertically slidably disposed within the fixed base and has an annular groove. One end of the sliding rod extends outward from the fixed base, and the other end is fixedly connected to the identifier. A boss is provided inside the sealing cylinder, and the identifier is slidably disposed within the boss. The fixed base has a groove for the movable clip to slide horizontally. One end of the movable clip has a first iron block. The electromagnetic induction element is installed on the outside of the fixed base corresponding to the first iron block. The electromagnetic induction element is coupled to an infrared sensor. When the carbon dioxide concentration in the sealed space exceeds a preset value, the infrared sensor sends an electrical signal to control the electromagnetic induction element to be energized. After being energized, the electromagnetic induction element generates an electromagnetic attraction force on the first iron block. The two ends of the first spring respectively abut against the fixed base and the sliding rod, and the first spring applies a force close to the sealing cylinder to the sliding rod.

[0006] Preferably, the movable locking component includes a movable locking block, a connecting rod, and a second spring. The movable locking block, the connecting rod, and the first iron block are fixedly connected by bolts. The second spring is sleeved on the outside of the connecting rod and applies a force close to the sliding rod to the movable locking block. One end of the movable locking block has a notch that mates with an annular groove. The electromagnetic induction component includes an induction coil and an iron core. The induction coil is wound around the outside of the iron core.

[0007] Preferably, a reset component is further provided between the fixing frame and the sliding rod. The reset component includes a magnetic block and a second iron block. The second iron block is fixed to the sliding rod by bolts. The magnetic block is fixed directly above the second iron block on the fixing frame. The sliding rod has an annular protrusion at the installation position corresponding to the first spring.

[0008] Preferably, the placement plate is further provided with a movable seal, which includes a sealing ring, a limiting bolt, and a third spring. The placement plate has a recess, the sealing ring is slidably disposed in the recess, one end of the limiting bolt passes through the placement plate and is fixedly connected to the sealing ring, the third spring is sleeved on the outside of the limiting bolt, and both ends of the third spring abut against the placement plate and the sealing ring respectively. The third spring is compressed after it abuts against the sealing ring at one end of the sealing cylinder.

[0009] Preferably, the drive assembly includes a motor, a conveyor belt, and a drive shaft. Two sets of conveyor belts are provided and are mounted on the testing table via the drive shafts. The output shaft of the motor is fixedly connected to one of the drive shafts. A fixing block is fixedly installed between the placement plate and the conveyor belt.

[0010] Preferably, the first power component is fixedly connected to the first movable plate, and the second power component is fixedly connected to the second movable plate. The first power component and the second power component are cylinders.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] By setting up a placement mechanism, a ventilation mechanism, and a sealing mechanism, multiple fire sprinklers can be placed on the two sets of placement mechanisms. Driven by the drive component, they move between the ventilation mechanism and the sealing mechanism. The upper and lower ends of the fire sprinklers are held in place by the sealing mechanism and the ventilation mechanism. Then, carbon dioxide gas is introduced into one end of the fire sprinkler. An infrared sensor detects the concentration of carbon dioxide on the outside of the other end of the fire sprinkler. When the carbon dioxide concentration exceeds the preset value, the marking component will mark the fire sprinkler, thus completing the entire detection process. The operation is simple and convenient, and the detection and manual placement actions can be carried out simultaneously, which greatly improves the detection efficiency. At the same time, the use of carbon dioxide detection will not cause pollution or waste. Attached Figure Description

[0013] Figure 1This is a structural diagram of a fire sprinkler head in the prior art;

[0014] Figure 2 This is a schematic diagram of the structure of a fire sprinkler head sealing test device according to the present invention;

[0015] Figure 3 This is a schematic diagram of the placement mechanism in this invention;

[0016] Figure 4 This is a schematic diagram of the ventilation mechanism in this invention;

[0017] Figure 5 This is a schematic diagram of the sealing mechanism in this invention;

[0018] Figure 6 This is a schematic diagram of the placement mechanism, ventilation mechanism, and sealing mechanism in this invention;

[0019] Figure 7 This is a schematic diagram of the internal structure of the sealing cylinder and the fixing seat in this invention;

[0020] Figure 8 This is a schematic diagram of the sliding rod and movable locking component in this invention;

[0021] Figure 9 for Figure 6 A magnified view of a section at point A in the middle;

[0022] Reference numerals: 1. Sprinkler; 2. Glass bulb; 3. Plug; 4. Nozzle body; 5. Air ventilation mechanism; 6. Testing platform; 7. Drive shaft; 8. Motor; 9. Conveyor belt; 10. Placement mechanism; 11. Magnetic block; 12. Sealing mechanism; 13. Fixing frame; 14. Placement plate; 15. Pulley; 16. Fixing block; 17. Air guide pipe; 18. First power assembly; 19. Air inlet pipe; 20. First movable plate; 21. Second power assembly; 22. 23. Sealing cylinder; 24. Second movable plate; 25. Infrared sensor; 26. Fixed base; 27. Marking rod; 28. Electromagnetic induction element; 29. ​​Second iron block; 30. Sliding rod; 31. Movable locking piece; 32. First iron block; 33. Second spring; 34. First spring; 35. Movable locking block; 36. Boss; 37. Annular boss; 38. Connecting rod; 39. Annular groove; 40. Third spring; 41. Sealing ring; 42. Sink; 43. Limiting bolt. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figures 1-9 As shown, a fire sprinkler head sealing performance testing device includes a testing platform 6, a placement mechanism 10, a ventilation mechanism 5, and a sealing mechanism 12. Two sets of placement mechanisms 10 are slidably mounted on the testing platform 6. A fixing frame 13 is mounted on the testing platform 6. The sealing mechanism 12 and the ventilation mechanism 5 are respectively mounted vertically on the fixing frame 13 and the testing platform 6. A driving assembly is provided on the testing platform 6 to drive the two sets of placement mechanisms 10 to slide horizontally in the same direction, allowing one set of placement mechanisms 10 to slide between the sealing mechanism 12 and the ventilation mechanism 5. The placement mechanism 10 includes a placement plate 14 and pulleys 15. The placement plate 14 has multiple grooves for installing fire sprinklers, and the pulleys 15 are rotatably mounted on the bottom of the placement plate 14. The ventilation mechanism 5 includes a first movable plate 20, a first power assembly 18, an air inlet pipe 19, and an air guide pipe 17. The first power assembly 18 is mounted on the testing platform 6 and is used to drive the first movable plate 20 to move vertically up and down. An air guide channel is provided inside the first movable plate 20. The number of air guide pipes 17 is the same as the number of grooves, and one end of the air guide pipes 17 and the air inlet pipe 19 is connected to the air guide channel. The sealing mechanism 12 includes a second movable plate 23, a sealing cylinder 22, an infrared sensor 24, a marking component, and a second power component 21. The second power component 21 is mounted on the fixed frame 13 and is used to drive the second movable plate 23 to rise and fall vertically. Multiple sealing cylinders 22 are provided and are mounted on the fixed frame 13. When the sealing cylinder 22 abuts against the placement plate 14, it will form a sealed space on the outside of one end of the fire sprinkler. The infrared sensor 24 is mounted on the sealing cylinder 22 and is used to detect the concentration of carbon dioxide in the sealed space. The marking component is mounted on the sealing cylinder 22 and marks the surface of the fire sprinkler when the concentration of carbon dioxide in the sealed space exceeds a preset value. The first power component 18 is fixedly connected to the first movable plate 20, and the second power component 21 is fixedly connected to the second movable plate 23. The first power component 18 and the second power component 21 are cylinders.

[0025] The marking assembly includes a sliding rod 29, a first spring 33, a marking rod 26, a movable locking element 30, and an electromagnetic induction element 27. A fixed base 25 is mounted on the sealing cylinder 22. The sliding rod 29 is vertically slidably disposed within the fixed base 25, and an annular groove 38 is provided on the sliding rod 29. One end of the sliding rod 29 extends outward from the outside of the fixed base 25, and the other end is fixedly connected to the marking rod 26. A boss 35 is provided inside the sealing cylinder 22, and the marking rod 26 is slidably disposed within the boss 35. The fixed base 25 has a groove for the movable locking element 30 to slide horizontally, and one end of the movable locking element 30 has... A first iron block 31 is provided. An electromagnetic induction element 27 is installed on the outer side of the fixed base 25 corresponding to the first iron block 31. The electromagnetic induction element 27 is coupled to an infrared sensor 24. When the carbon dioxide concentration in the sealed space exceeds a preset value, the infrared sensor 24 sends an electrical signal to control the electromagnetic induction element 27 to be energized. After being energized, the electromagnetic induction element 27 generates an electromagnetic attraction force on the first iron block 31. The two ends of the first spring 33 respectively abut against the fixed base 25 and the sliding rod 29, and the first spring 33 applies a force close to the sealing cylinder 22 to the sliding rod 29. When the sealing cylinder 22 is not... When the sealing cylinder 22 contacts the placement plate 14, one end of the movable clip 30 is embedded in the annular groove 38. At this time, the first spring 33 is compressed, and the marker rod 26 retracts to the inside of the boss 35. After the sealing cylinder 22 contacts the placement plate 14, carbon dioxide gas is introduced into one end of the fire sprinkler by the ventilation mechanism 5. If the sealing performance of the fire sprinkler is not up to standard, carbon dioxide leakage will occur. Since the sealing cylinder 22 forms a sealed space on the outside of the fire sprinkler, when the carbon dioxide concentration in the sealed space exceeds the preset value, the infrared sensor 24 sends a control signal to make... When the electromagnetic induction element 27 is energized, it generates an induced magnetic field, which in turn generates an electromagnetic attraction force on the first iron block 31, causing the first iron block 31 and the movable locking element 30 to slide, allowing the movable locking element 30 to slide out of the annular groove 38. At this time, the first spring 33 pushes the sliding rod 29 and the marking rod 26 to slide, so that the marking rod 26 extends out of the protrusion 35 and makes a mark on the surface of the sprinkler 1 of the fire sprinkler head. Thus, based on the marking on the surface of the fire sprinkler head, it can be determined whether the sealing performance of each fire sprinkler head meets the standard. The marking rod 26 can be a color-marking stick.

[0026] The movable locking component 30 includes a movable locking block 34, a connecting rod 37, and a second spring 32. The movable locking block 34, the connecting rod 37, and the first iron block 31 are fixedly connected by bolts. The second spring 32 is sleeved on the outside of the connecting rod 37 and applies a force close to the sliding rod 29 to the movable locking block 34. One end of the movable locking block 34 has a notch that mates with the annular groove 38. The electromagnetic induction component 27 includes an induction coil and an iron core. The induction coil is wound around the outside of the iron core. Under the action of the second spring 32, the movable locking block 34 remains in contact with the sliding rod 29. When the movable locking block 34 is aligned with the annular groove 38, one end of the movable locking block 34 is embedded in the annular groove 38, thereby preventing the sliding rod 29 from sliding under the action of the first spring 33, so that the marking rod 26 is in the state of retracting the boss 35. In this embodiment, the sealing cylinder 22, the fixing seat 25, the sliding rod 29, and the movable locking block 34 are all made of plastic.

[0027] A reset component is also provided between the fixed frame 13 and the sliding rod 29. The reset component includes a magnetic block 11 and a second iron block 28. The second iron block 28 is fixed to the sliding rod 29 by bolts. The magnetic block 11 is fixed on the fixed frame 13 directly above the second iron block 28. The sliding rod 29 has an annular protrusion 36 corresponding to the installation position of the first spring 33. When the sealing performance of one of the fire sprinklers is substandard, the marking rod 26 will mark its surface. At this time, the marking rod 26 is in the state of protruding from the protrusion 35. In order to facilitate the detection of the next fire sprinkler, the second power assembly 21 drives the second movable plate 23 and the sealing cylinder 22 to move upward until the second iron block 28 contacts the magnetic block 11. The magnetic block 11 has a certain attraction force on the second iron block 28. When the force assembly 21 drives the second movable plate 23 and the sealing cylinder 22 to move downward for the next test, the marker rod 26 is on the surface of the protruding boss 35, and the sliding rod 29 remains stationary under the attraction of the magnetic block 11. The sliding rod 29 slides relative to the fixed seat 25, causing the first spring 33 to be compressed. When the annular protrusion 36 abuts against the fixed seat 25, one end of the movable locking block 34 slides to the state of being aligned with the annular groove 38, and the movable locking block 34 is embedded in the annular groove 38. At this time, the second iron block 28 separates from the magnetic block 11, and the sliding rod 29 will not slide under the limiting action of the movable locking block 34. In this way, the marker rod 26 is in the state of being retracted into the boss 35, which facilitates the re-testing of the sealing performance of the fire sprinkler head.

[0028] The placement plate 14 is also equipped with a movable seal, which includes a sealing ring 40, a limiting bolt 42, and a third spring 39. The placement plate 14 has a recess 41, and the sealing ring 40 is slidably disposed in the recess 41. One end of the limiting bolt 42 passes through the placement plate 14 and is fixedly connected to the sealing ring 40. The third spring 39 is sleeved on the outside of the limiting bolt 42, and both ends of the third spring 39 abut against the placement plate 14 and the sealing ring 40, respectively. The third spring 39 is located at one end of the sealing cylinder 22 and is connected to the sealing ring. After being compressed upon contact, when the second power assembly 21 drives the second movable plate 23 and the sealing cylinder 22 to move downwards, the sealing cylinder 22 contacts the sealing ring 40, thereby forming a sealed space on the outside of the fire sprinkler head. Adding a sealing ring to the surface of the sealing ring 40 can improve the sealing performance of both. Subsequently, the boss 35 contacts the sprinkler 1 of the fire sprinkler head, thereby pressing the fire sprinkler head tightly onto the placement plate 14 to ensure that there is no gas leakage between the fire sprinkler head and the placement plate 14, which would affect the test results.

[0029] The drive assembly includes a motor 8, a conveyor belt 9, and a drive shaft 7. Two sets of conveyor belts 9 are provided and are mounted on the test platform 6 via the drive shafts 7. The output shaft of the motor 8 is fixedly connected to one of the drive shafts 7. A fixing block 16 is fixedly installed between the placement plate 14 and the conveyor belt 9. The motor 8 drives the drive shaft 7 to rotate in both directions, so that the conveyor belt can drive the two sets of placement mechanisms 10 to slide back and forth horizontally. This allows the two sets of placement mechanisms 10 to slide sequentially between the sealing mechanism 12 and the ventilation mechanism 5. In this way, while placing the fire sprinklers on one set of placement mechanisms 10, the sealing performance of the fire sprinklers on the other set of placement mechanisms 10 can be tested, effectively improving the testing efficiency.

[0030] Working principle: Multiple fire sprinklers are placed on one of the placement plates 14, with the sprinkler 1 facing upwards and the inlet end of the sprinkler body 4 facing downwards. Then, the second power assembly 21 drives the second movable plate 23 and the sealing cylinder 22 downwards until the sealing cylinder 22 contacts the sealing ring 40, and the boss 35 presses the sprinkler 1 tightly. At this time, a sealed space is formed between the sealing cylinder 22 and the placement plate 14. The sealed space of each fire sprinkler is independent. Then, the first power assembly 18 drives the first movable plate 20 upwards until one end of the air guide pipe 17 contacts one end of the sprinkler body 4. Then, carbon dioxide gas is introduced through the air inlet pipe 19. The carbon dioxide gas enters each sprinkler body 4 through the air guide channel and the air guide pipe 17. When the sealing of one of the fire sprinklers is not up to standard, the carbon dioxide gas will leak from the plug 3 and the sprinkler body 4 into the sealed space. Since carbon dioxide is a gas with a large molecular weight, it has a unique absorption peak in the infrared spectrum. Infrared sensing The device 24 determines the presence and concentration of carbon dioxide by detecting infrared radiation of a specific wavelength. When the concentration of carbon dioxide gas rises above a preset value, the infrared sensor 24 sends a control signal, which energizes the electromagnetic induction element 27 and generates an induced magnetic field, which in turn generates an electromagnetic attraction force on the first iron block 31. This causes the movable locking part 30 to disengage from the annular groove 38, and the sliding rod 29 and the marking rod 26 slide under the action of the first spring 33, so that one end of the marking rod 26 touches the sprinkler 1 to make a mark. When the concentration of carbon dioxide in the sealed space is lower than the preset value, no current is energized in the electromagnetic induction element 27, and the movable locking part 30 does not slide, so that the positions of the sliding rod 29 and the marking rod 26 do not change. After the detection is completed, the marking on the surface of different fire sprinklers can be checked to determine whether their sealing meets the requirements. The two sets of placement mechanisms 10 can realize the detection and placement of fire sprinklers simultaneously, which is simple and convenient to operate and effectively improves the detection efficiency.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fire sprinkler head sealing performance testing device, comprising a testing platform (6), a placement mechanism (10), a ventilation mechanism (5), and a sealing mechanism (12), characterized in that, Two sets of placement mechanisms (10) are provided and slidably mounted on the testing platform (6). A fixing frame (13) is provided on the testing platform (6). The sealing mechanism (12) and the ventilation mechanism (5) are respectively installed on the fixing frame (13) and the testing platform (6) in an up-down distribution. A driving assembly is provided on the testing platform (6). The driving assembly is used to drive the two sets of placement mechanisms (10) to slide horizontally in the same direction, and to allow one set of placement mechanisms (10) to slide between the sealing mechanism (12) and the ventilation mechanism (5). The placement mechanism (10) includes a placement plate (14) and a pulley (15). The placement plate (14) has multiple grooves for installing fire sprinklers. The pulley (15) is rotatably mounted on the placement plate (14). At the bottom of the ), the ventilation mechanism (5) includes a first movable plate (20), a first power assembly (18), an air inlet pipe (19), and a guide pipe (17). The first power assembly (18) is installed on the detection table (6) and is used to drive the first movable plate (20) to rise and fall vertically. An air guide channel is provided inside the first movable plate (20). The number of guide pipes (17) is the same as the number of grooves, and one end of the guide pipe (17) and the air inlet pipe (19) is connected to the air guide channel. The sealing mechanism (12) includes a second movable plate (23), a sealing cylinder (22), an infrared sensor (24), a marking assembly, and a second power assembly (21). The second power assembly (21) is installed on the fixed frame (13) and is used to drive the first movable plate (20) to rise and fall vertically. The second movable plate (23) is vertically raised and lowered. Multiple sealing cylinders (22) are provided and installed on the fixed frame (13). When the sealing cylinder (22) contacts the placement plate (14), it forms a sealed space on the outside of one end of the fire sprinkler. The infrared sensor (24) is installed on the sealing cylinder (22) and is used to detect the concentration of carbon dioxide in the sealed space. The marking component is installed on the sealing cylinder (22) and marks the surface of the fire sprinkler when the carbon dioxide concentration in the sealed space exceeds a preset value. The marking component includes a sliding rod (29), a first spring (33), a marking rod (26), a movable clip (30), and an electromagnetic induction element (27). The sealing cylinder (22) is equipped with... A fixed base (25) is provided, and the sliding rod (29) is vertically slidably disposed within the fixed base (25). An annular groove (38) is provided on the sliding rod (29). One end of the sliding rod (29) extends out of the outside of the fixed base (25), and the other end is fixedly connected to the marking rod (26). A boss (35) is provided inside the sealing cylinder (22), and the marking rod (26) is slidably disposed within the boss (35). The fixed base (25) has a groove for the horizontal sliding of the movable clamp (30). One end of the movable clamp (30) has a first iron block (31). The electromagnetic induction element (27) is installed on the outside of the fixed base (25) corresponding to the first iron block (31). The electromagnetic induction element (27) is coupled to the infrared sensor (24).When the carbon dioxide concentration in the sealed space exceeds a preset value, the infrared sensor (24) sends an electrical signal to control the electromagnetic induction element (27) to be energized. After being energized, the electromagnetic induction element (27) generates an electromagnetic attraction force on the first iron block (31). The two ends of the first spring (33) abut against the fixed seat (25) and the sliding rod (29) respectively, and the first spring (33) applies a force close to the sealing cylinder (22) to the sliding rod (29). The movable locking element (30) includes a movable locking block (34), a connecting rod (37) and a second spring (32). The movable locking block (34), the connecting rod (37) and the first iron block (31) are fixedly connected by bolts. A spring (32) is sleeved on the outside of the connecting rod (37) and applies a force close to the sliding rod (29) to the movable locking block (34). One end of the movable locking block (34) has a notch that mates with the annular groove (38). The electromagnetic induction element (27) includes an induction coil and an iron core. The induction coil is wound around the outside of the iron core. The drive assembly includes a motor (8), a conveyor belt (9), and a drive shaft (7). Two sets of conveyor belts (9) are provided and are mounted on the detection table (6) via the drive shaft (7). The output shaft of the motor (8) is fixedly connected to one of the drive shafts (7). A fixing block (16) is fixedly installed between the placement plate (14) and the conveyor belt (9).

2. The fire sprinkler head sealing performance testing device according to claim 1, characterized in that, A reset component is also provided between the fixed frame (13) and the sliding rod (29). The reset component includes a magnetic block (11) and a second iron block (28). The second iron block (28) is fixed to the sliding rod (29) by bolts. The magnetic block (11) is fixed directly above the fixed frame (13) corresponding to the second iron block (28). The sliding rod (29) has an annular protrusion (36) at the installation position corresponding to the first spring (33).

3. The fire sprinkler head sealing performance testing device according to claim 1, characterized in that, The placement plate (14) is also provided with a movable sealing element, which includes a sealing ring (40), a limiting bolt (42) and a third spring (39). The placement plate (14) has a groove (41). The sealing ring (40) is slidably disposed in the groove (41). One end of the limiting bolt (42) passes through the placement plate (14) and is fixedly connected to the sealing ring (40). The third spring (39) is sleeved on the outside of the limiting bolt (42), and both ends of the third spring (39) abut against the placement plate (14) and the sealing ring (40) respectively. The third spring (39) is compressed after it abuts against the sealing ring (40) at one end of the sealing cylinder (22).

4. The fire sprinkler head sealing performance testing device according to claim 1, characterized in that, The first power assembly (18) is fixedly connected to the first movable plate (20), and the second power assembly (21) is fixedly connected to the second movable plate (23). The first power assembly (18) and the second power assembly (21) are cylinders.

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