Airtightness detection equipment for fire extinguisher

Abstract

The utility model discloses an air tightness detection device for a fire extinguisher, which relates to the technical field of fire extinguisher production and comprises two conveying devices and a soaking tank arranged between the two conveying devices, and a portal frame is arranged above the two conveying devices and the soaking tank. The air cylinder pushes the sliding block to drive the movable block and the arc plate to swing in a reciprocating mode, the problem that surface tension of water forms a surface layer at a fire extinguisher leakage point when the fire extinguisher is soaked in water and static is solved, and the accuracy of fire extinguisher airtightness detection is improved; a driven rotating wheel can be driven to rotate through a driving rotating wheel in an arc plate, so that the fire extinguisher rotates to throw away residual water outside the fire extinguisher after airtightness detection is completed, and the fire extinguisher is matched with a fan to blow-dry the water outside the fire extinguisher; the problem that residual water outside the fire extinguisher needs to be wiped away manually after airtightness detection of the fire extinguisher is completed is solved, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of fire extinguisher manufacturing technology, specifically to an airtightness testing device for fire extinguishers. Background Technology

[0002] As an important fire-fighting equipment to ensure public safety and the safety of people's lives and property, the airtightness of fire extinguishers directly affects their ability to extinguish fires in emergencies. Currently, the water immersion method is a relatively common and intuitive method for testing the airtightness of fire extinguishers. However, the existing water immersion method has many problems.

[0003] 1. When a fire extinguisher has a tiny leak, when it is placed in water and is still, the amount of leaked gas may not be enough to form obvious bubbles because the pressure inside and outside the fire extinguisher needs some time to equalize.

[0004] Furthermore, the surface tension of water will form a surface layer at the leak point of the fire extinguisher. When stationary, a small amount of leaked gas may be bound by the surface tension of the surface layer and it will be difficult to break through the binding to form visible bubbles, resulting in poor accuracy of fire extinguisher airtightness detection.

[0005] 2. After the airtightness test of the fire extinguisher is completed, water residue will remain on the outside of the fire extinguisher. At this time, it is necessary to manually wipe the water residue off the outside of the fire extinguisher to facilitate the next labeling process, which results in low work efficiency and high labor intensity for the operators. Utility Model Content

[0006] To address the above problems, this utility model provides an airtightness testing device for fire extinguishers, which solves the aforementioned issues.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an airtightness testing device for fire extinguishers, comprising two conveying devices and an immersion tank disposed between the two conveying devices, a gantry frame disposed above the two conveying devices and the immersion tank, a traveling trolley disposed on the top of the gantry frame, and a support plate connected to the bottom of the traveling trolley;

[0008] A hydraulic cylinder is connected to the bottom of the support plate, and a support frame is connected to the output end of the hydraulic cylinder. Through slots are opened on both sides of the support frame, and guide rods are connected inside the two through slots. Two movable blocks are sleeved on the outside of the guide rods.

[0009] An electric push rod is connected to the top of the movable block, and a connecting plate is connected to the output end of the electric push rod. Several arc plates are fixedly connected to the bottom of the connecting plate.

[0010] Preferably, the top of the support frame is connected to two cylinders, the output end of the cylinders is connected to a slider, one side of the slider is connected to a fixed plate, and one side of the fixed plate is connected to one side of the two movable blocks.

[0011] Preferably, the connecting plate has a plurality of rotating shafts inside, and an active rotating wheel is connected to the outside of the rotating shafts. The active rotating wheel is located inside the arc plate.

[0012] Preferably, the arc plate has a driven rotating wheel inside, and a spring inside the arc plate. One end of the spring is connected to a connecting frame, and the driven wheel is rotatably mounted on the connecting frame.

[0013] Preferably, one side of each of the two rotating shafts is provided with a motor, one side of the motor is connected to one side of the connecting plate, and the output end of the motor is connected to the top of the rotating shaft.

[0014] Preferably, the top ends of several of the rotating shafts are respectively connected to sprockets, and the sprockets are connected by chain drive.

[0015] Preferably, a number of fans are connected to the top of the support frame and the two sides of the gantry frame.

[0016] Preferably, one of the conveying devices has a plurality of mounting plates connected to its top, and two limit rails are connected to one side of each mounting plate.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This application uses a cylinder to push a slider to drive a movable block and an arc plate to swing back and forth, so that the arc plate drives the fire extinguisher to swing in the water. This solves the problem that when the fire extinguisher is immersed in water and stationary, the surface tension of the water will form a surface layer at the leak point of the fire extinguisher, which may cause the small amount of gas leaking from the fire extinguisher to be bound by the surface tension of the surface layer and difficult to break through the binding to form visible bubbles. This is beneficial to improving the accuracy of fire extinguisher air tightness detection.

[0019] 2. This application can also drive the driven wheel to rotate through the active rotating wheel in the arc plate, so that the fire extinguisher can rotate to shake off the residual water on the outside after the air tightness test is completed, and cooperate with the fan to dry the water on the outside of the fire extinguisher. This solves the problem that the residual water on the outside of the fire extinguisher still needs to be wiped dry after the air tightness test is completed, which helps to improve work efficiency and reduce the labor intensity of operators. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the support structure of this utility model;

[0022] Figure 3 This is a schematic cross-sectional view of the support structure of this utility model;

[0023] Figure 4 This is a partial structural schematic diagram of the present invention;

[0024] Figure 5 This is a schematic diagram of the arc plate structure of this utility model;

[0025] Figure 6 This is a cross-sectional view of the driven wheel of this utility model.

[0026] The diagram shows the following labels: 1. Conveying equipment; 2. Mounting plate; 3. Limit bar; 4. Immersion tank; 5. Gantry frame; 6. Traveling trolley; 7. Support plate; 8. Hydraulic cylinder; 9. Support frame; 10. Fan; 11. Guide rod; 12. Movable block; 13. Fixed plate; 14. Slider; 15. Cylinder; 16. Electric push rod; 17. Connecting plate; 18. Arc plate; 19. Rotating shaft; 20. Driving wheel; 21. Driven wheel; 22. Sprocket; 23. Motor; 24. Spring. Detailed Implementation

[0027] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0028] Please see Figures 1 to 6 An airtightness testing device for fire extinguishers includes two conveying devices 1 and a water immersion tank 4 disposed between the two conveying devices 1. The two conveying devices 1 are used to transport fire extinguishers at a fixed distance. One conveying device 1 transports the fire extinguisher to the testing area, and the other conveying device 1 transports the fire extinguisher after the airtightness test is completed to the next process. The conveying devices 1 are known technologies, and those skilled in the art can and should understand their specific functions and structures, so they will not be described in detail here. A gantry frame 5 is provided above the two conveying devices 1 and the water immersion tank 4. A traveling trolley 6 is provided on the top of the gantry frame 5. A support plate 7 is connected to the bottom of the traveling trolley 6. The wheels of the traveling trolley 6 roll on the track on the top of the gantry frame 5, so that the traveling trolley 6 moves horizontally along the track direction, thereby driving the support plate 7 to move, and then moving and transporting the fire extinguisher through the arc plate 18. The traveling trolley 6 is known technologies, and those skilled in the art can and should understand its specific functions and structures, so it will not be described in detail here.

[0029] The bottom of the support plate 7 is connected to a hydraulic cylinder 8, and the output end of the hydraulic cylinder 8 is connected to a support frame 9. When the traveling trolley 6 moves to a suitable position, the output end of the hydraulic cylinder 8 drives the support frame 9 to lift and lower, thereby controlling the lifting and lowering of the arc plate 18. The support frame 9 has through slots on both sides, and guide rods 11 are connected inside the two through slots respectively. Two movable blocks 12 are sleeved on the outside of the guide rods 11.

[0030] The top of the movable block 12 is connected to an electric push rod 16, the output end of the electric push rod 16 is connected to a connecting plate 17, and the bottom of the connecting plate 17 is fixedly connected to several arc plates 18.

[0031] The top of the support frame 9 is connected to two cylinders 15. The output end of the cylinders 15 is connected to a slider 14. A fixed plate 13 is connected to one side of the slider 14. One side of the fixed plate 13 is connected to one side of two movable blocks 12. When the fire extinguisher is tested for air tightness, the fire extinguisher is transported to the appropriate position at equal distances by the conveying device 1. Then the output end of the electric push rod 16 pushes the connecting plate 17 to move the arc plate 18 to clamp and fix the fire extinguisher. It should be noted that at this time, the active rotating wheel 20 and the driven rotating wheel 21 inside the arc plate 18 clamp and fix the outside of the fire extinguisher.

[0032] Next, the output end of the hydraulic cylinder 8 drives the support frame 9, the arc plate 18, and the fire extinguisher clamped and fixed in the arc plate 18 to rise. Then, the traveling trolley 6 moves them to the top of the immersion tank 4. At this time, the output end of the hydraulic cylinder 8 lowers them so that the arc plate 18 drives the fire extinguisher to be immersed in the water.

[0033] When a fire extinguisher has a small leak, it may not produce enough gas to form visible bubbles when it is initially placed in water and still. This is because the amount of gas leaking is small and the pressure inside and outside the extinguisher needs time to equalize. However, shaking the extinguisher changes the distribution of the gas inside. Gas that may have accumulated locally is stirred up and is more easily released from the leak. This also disrupts the temporary pressure balance at the leak point, making it easier for gas to escape into the water and form bubbles. Furthermore, the surface tension of the water creates a surface layer at the leak point. When the extinguisher is still, a small amount of leaking gas may be trapped by the surface tension of this layer and find it difficult to break through to form visible bubbles. Shaking the extinguisher disturbs the surface tension of the water, destroying the surface layer and reducing the resistance to gas escape. This allows the previously trapped gas to more easily form bubbles and rise to the surface.

[0034] Therefore, when the fire extinguisher is immersed in water, the output ends of the two cylinders 15 drive the slider 14 to move back and forth, so that the slider 14 drives the movable block 12 to move back and forth along the guide rod 11 through the fixed plate 13, which in turn drives the movable block 12 to swing back and forth along the arc plate 18 and the fire extinguisher, so that the gas inside the fire extinguisher can be discharged through the leak point more quickly, making it convenient for personnel to observe.

[0035] It should be further explained that when a fire extinguisher is submerged in water, it does not swing continuously, but rather swings in the water and then stabilizes, making it easier for personnel to observe.

[0036] The connecting plate 17 has several rotating shafts 19 inside, and the rotating shafts 19 are connected to the outside of the driving rotating wheel 20, which is located inside the arc plate 18.

[0037] The arc plate 18 is equipped with a driven wheel 21 and a spring 24. One end of the spring 24 is connected to a connecting frame. The driven wheel 21 is mounted on the connecting frame. When the fire extinguisher comes into contact with the driven wheel 21, it will squeeze the driven wheel 21, causing the driven wheel 21 to drive the connecting frame to squeeze the spring 24. At this time, the spring 24 resists the squeezing force, causing the connecting frame to drive the driven wheel 21 to firmly clamp the fire extinguisher.

[0038] Both the active rotating wheel 20 and the driven rotating wheel 21 are provided with anti-slip material to ensure that the active rotating wheel 20 will drive the fire extinguisher to rotate when it rotates.

[0039] One side of each of the two rotating shafts 19 is equipped with a motor 23, one side of the motor 23 is connected to one side of the connecting plate 17, and the output end of the motor 23 is connected to the top of the rotating shaft 19.

[0040] Several rotating shafts 19 are connected to sprockets 22 at their top ends, and the sprockets 22 are connected by chain drive.

[0041] Several fans 10 are connected to the top of the support frame 9 and both sides of the gantry frame 5. After the fire extinguisher airtightness test is completed, the fire extinguisher is lifted from the immersion tank 4 by the hydraulic cylinder 8. Then, the fire extinguisher is swung again to shake off the water outside the fire extinguisher. After the swaying stops, the output ends of the two motors 23 drive two of the rotating shafts 19 to rotate. At this time, several rotating shafts 19 will rotate synchronously through the cooperation of the sprocket 22 and the chain, so that the rotating shafts 19 drive the driving rotating wheel 20 to rotate. Furthermore, because the driving rotating wheel 20 is connected to the driven rotating wheel 21 through the transmission, the driving rotating wheel 20 will drive the driven rotating wheel 21 to rotate synchronously.

[0042] The fire extinguisher is rotated by the rotation of the active rotating wheel 20 and the driven rotating wheel 21. At the same time, the blower 10 blows to treat the residual water on the outside of the fire extinguisher, eliminating the need for operators to wipe the water off the outside of the fire extinguisher. Then, the traveling trolley 6 moves the fire extinguisher to the top of another conveying device 1 and places the fire extinguisher on the conveying device 1 by the hydraulic cylinder 8. At this time, the arc plate 18 releases the fire extinguisher, and then the fire extinguisher is moved to the labeling process for labeling.

[0043] It should be noted that if any fire extinguisher fails the airtightness test, it must be manually removed by personnel to prevent it from entering the labeling process.

[0044] One of the conveying devices 1 has several mounting plates 2 connected to its top. Two limit bars 3 are connected to one side of the mounting plate 2. The limit bars 3 can limit the fire extinguisher, so that the fire extinguisher can be conveyed stably.

[0045] When using this utility model:

[0046] First, the fire extinguisher is transported to the appropriate position at equal distances by the conveying device 1. Then, the output end of the electric push rod 16 pushes the connecting plate 17 to move the arc plate 18 to clamp and fix the fire extinguisher. It should be noted that at this time, the driving wheel 20 and the driven wheel 21 inside the arc plate 18 clamp and fix the fire extinguisher to the outside. Next, the output end of the hydraulic cylinder 8 drives the support frame 9, the arc plate 18 and the fire extinguisher clamped and fixed in the arc plate 18 to rise. Then, the traveling trolley 6 moves them to the top of the immersion tank 4. At this time, the output end of the hydraulic cylinder 8 lowers them so that the arc plate 18 drives the fire extinguisher to be immersed in the water.

[0047] Secondly, when the fire extinguisher is immersed in water, the output ends of the two cylinders 15 drive the slider 14 to move back and forth, so that the slider 14 drives the movable block 12 to move back and forth along the guide rod 11 through the fixed plate 13, which in turn drives the movable block 12 to swing back and forth along the arc plate 18 and the fire extinguisher, so that the gas inside the fire extinguisher can be discharged through the leak point more quickly, making it convenient for personnel to observe.

[0048] Then, the fire extinguisher is lifted from the immersion tank 4 by the hydraulic cylinder 8, and then the fire extinguisher is swung again to shake off the water on the outside of the fire extinguisher. Then the swaying stops, and the output ends of the two motors 23 drive two of the rotating shafts 19 to rotate. At this time, several rotating shafts 19 will rotate synchronously through the cooperation of the sprocket 22 and the chain, so that the rotating shafts 19 drive the driving rotating wheel 20 to rotate. Furthermore, because the driving rotating wheel 20 is connected to the driven rotating wheel 21 through the transmission, the driving rotating wheel 20 will drive the driven rotating wheel 21 to rotate synchronously.

[0049] Finally, the fire extinguisher is rotated by the rotation of the active rotating wheel 20 and the driven rotating wheel 21, and at the same time, the blower 10 blows to treat the residual water on the outside of the fire extinguisher, so that the operator does not need to wipe the water on the outside of the fire extinguisher. Then the traveling trolley 6 carries the fire extinguisher to the top of another conveying device 1, and the fire extinguisher is placed on the conveying device 1 by the hydraulic cylinder 8. At this time, the arc plate 18 releases the fire extinguisher, and then the fire extinguisher is moved to the labeling process for labeling.

[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An airtightness testing device for fire extinguishers, comprising two conveying devices (1) and a water immersion tank (4) disposed between the two conveying devices (1), wherein a gantry frame (5) is disposed above the two conveying devices (1) and the water immersion tank (4), characterized in that: The top of the gantry (5) is provided with a traveling trolley (6), and the bottom of the traveling trolley (6) is connected to a support plate (7); The bottom of the support plate (7) is connected to a hydraulic cylinder (8), the output end of the hydraulic cylinder (8) is connected to a support frame (9), and the two sides of the support frame (9) are respectively provided with through slots. The two through slots are respectively connected to guide rods (11), and two movable blocks (12) are sleeved on the outside of the guide rods (11). The top of the movable block (12) is connected to an electric push rod (16), the output end of the electric push rod (16) is connected to a connecting plate (17), and the bottom of the connecting plate (17) is fixedly connected to several arc plates (18).

2. The airtightness testing device for fire extinguishers according to claim 1, characterized in that: The top of the support frame (9) is connected to two cylinders (15), the output end of the cylinders (15) is connected to a slider (14), one side of the slider (14) is connected to a fixing plate (13), and one side of the fixing plate (13) is connected to one side of two movable blocks (12).

3. The airtightness testing device for fire extinguishers according to claim 2, characterized in that: The connecting plate (17) has several rotating shafts (19) inside, and the rotating shafts (19) are connected to an active rotating wheel (20) outside. The active rotating wheel (20) is located inside the arc plate (18).

4. The airtightness testing device for fire extinguishers according to claim 3, characterized in that: The arc plate (18) is provided with a driven wheel (21) inside, and a spring (24) is provided inside the arc plate (18). One end of the spring (24) is connected to a connecting frame, and the driven wheel (21) is located on the connecting frame.

5. The airtightness testing device for fire extinguishers according to claim 3, characterized in that: One side of each of the two rotating shafts (19) is provided with a motor (23), one side of the motor (23) is connected to one side of the connecting plate (17), and the output end of the motor (23) is connected to the top of the rotating shaft (19).

6. The airtightness testing device for fire extinguishers according to claim 5, characterized in that: The top ends of several of the shafts (19) are respectively connected to sprockets (22), which are connected by chain drive.

7. The airtightness testing device for fire extinguishers according to claim 1, characterized in that: Several fans (10) are connected to the top of the support frame (9) and the two sides of the gantry frame (5).

8. The airtightness testing device for fire extinguishers according to claim 1, characterized in that: One of the conveying devices (1) has several mounting plates (2) connected to its top, and two limit rails (3) are connected to one side of the mounting plate (2).

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