Dry powder extinguisher siphon with one-way inflation channel

Abstract

The dry powder extinguisher siphon with the one-way inflation channel comprises a siphon body, a notch is formed in the position, close to the top end, of the outer wall of the siphon body, and a one-way valve mechanism is arranged at the position, corresponding to the notch, of the outer wall of the siphon body. The one-way valve mechanism comprises a one-way sealing piece, and the one-way sealing piece is positioned and installed at the position, corresponding to the notch, of the siphon. The one-way sealing piece is a rubber ring; according to the nitrogen filling device, when nitrogen is filled into the tank body through the device head assembly, if the bottom end of the siphon is blocked by dry powder in the tank body, the air pressure in the siphon is increased, so that the nitrogen in the siphon bursts through the rubber ring to be normally filled into the tank body, and the nitrogen can be filled into the tank body after the nitrogen filling is stopped. And when the fire extinguisher is used, the rubber ring can recover under the action of self elasticity to block the notch again, so that nitrogen is prevented from entering the siphon from the notch in the use process of the fire extinguisher, and the use effect is good.

Description

A siphon tube for dry powder fire extinguishers with a one-way inflation channel Technical Field

[0001] This utility model relates to the field of fire extinguisher technology, specifically a siphon tube for a dry powder fire extinguisher with a one-way inflation channel. Background Technology

[0002] Currently, most portable dry powder fire extinguishers on the market consist of a canister, a head assembly, a siphon tube, and dry powder and compressed nitrogen to be filled into the canister. During the production and assembly process, dry powder is first filled into the canister, then the head assembly with the siphon tube is installed and tightened at the canister opening, and finally compressed nitrogen is filled into the canister through the head assembly. During this process, because the bottom end of the siphon tube is inserted into the dry powder, the dry powder can easily clog the siphon tube. In this case, the nitrogen is only filled into the siphon tube and cannot reach the nitrogen storage area in the canister. The pressure gauge on the head assembly shows that the pressure in the siphon tube has reached the target value, but the actual total amount of nitrogen in the canister is far from sufficient, causing the dry powder fire extinguisher to malfunction.

[0003] Therefore, we propose a siphon tube for dry powder fire extinguishers with a one-way inflation channel. Summary of the Invention

[0004] The purpose of this invention is to provide a siphon tube for a dry powder fire extinguisher with a one-way inflation channel to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A siphon tube for a dry powder fire extinguisher with a one-way inflation channel includes a siphon tube, a groove is provided on the outer wall of the siphon tube near the top, and a one-way valve mechanism is provided on the outer wall of the siphon tube corresponding to the groove.

[0007] As a further embodiment of this utility model: the one-way valve mechanism includes a one-way seal, and the one-way seal is positioned on the siphon tube at the corresponding position of the slot.

[0008] As a further embodiment of this utility model: the one-way sealing element is a rubber ring, and an annular groove is provided on the outer wall of the siphon tube near the top. The groove opening is located in the annular groove, and the rubber ring is sleeved and installed in the annular groove.

[0009] As a further embodiment of this utility model: the cross-section of the rubber ring is circular, and the outer wall of the rubber ring is in contact with the inner wall of the annular groove.

[0010] As a further improvement of this utility model: the outer wall of the siphon tube has integrally formed raised rings on both the upper and lower sides of the annular groove, and the rubber ring is located between the two raised rings.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] In this invention, when nitrogen is charged into the canister through the head assembly, if the dry powder inside the canister blocks the bottom of the siphon tube, the pressure inside the siphon tube will increase, causing the nitrogen inside the siphon tube to break through the rubber ring and enter the canister normally. This ensures that the canister is filled with a sufficient amount of nitrogen. After charging stops, the rubber ring will recover under its own elasticity to seal the slot again, thus preventing nitrogen from entering the siphon tube through the slot during the use of the fire extinguisher, resulting in good performance. Attached Figure Description

[0013] Figure 1 is a schematic diagram of the structure of a siphon tube for a dry powder fire extinguisher with a one-way inflation channel.

[0014] Figure 2 is a schematic diagram of the groove in the siphon tube of a dry powder fire extinguisher with a one-way inflation channel.

[0015] Among them, 1 is the tank body, 2 is the dry powder, 3 is the head assembly, 4 is the siphon tube, 5 is the slot, 6 is the annular groove, 7 is the convex ring, and 8 is the rubber ring. Detailed Implementation

[0016] 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.

[0017] Please refer to Figures 1-2. In this embodiment of the present invention, a siphon tube for a dry powder fire extinguisher with a one-way inflation channel includes a siphon tube 4. A groove 5 is provided on the outer wall of the siphon tube 4 near the top. A one-way valve mechanism is provided on the outer wall of the siphon tube 4 at the corresponding position of the groove 5.

[0018] By adopting the above-mentioned solution, this utility model, when in use, fills the dry powder 2 into the tank 1, and after fixing the siphon tube 4 to the head assembly 3, fixes the head assembly 3 to the tank opening. Then, when nitrogen is filled into the tank 1 through the head assembly 3, if the dry powder 2 in the tank 1 blocks the bottom end of the siphon tube 4, the gas pressure in the siphon tube 4 will increase, thereby causing the nitrogen in the siphon tube 4 to open the one-way valve mechanism and fill the tank 1 normally. This ensures that the tank 1 can be filled with a sufficient amount of nitrogen. When using the dry powder fire extinguisher, after opening the head assembly 3, the high-pressure nitrogen in the tank 1 cannot enter the siphon tube 4 through the one-way valve mechanism, but can only enter through the bottom end of the siphon tube 4 and be discharged from the head assembly 3, thereby driving the dry powder 2 to spray out, resulting in good performance.

[0019] Referring specifically to Figure 1, in one embodiment of this utility model, the one-way valve mechanism includes a one-way seal, and the one-way seal is positioned on the siphon tube 4 at the corresponding position of the slot 5. The one-way seal is a rubber ring 8. An annular groove 6 is provided on the outer wall of the siphon tube 4 near the top. The slot 5 is located in the annular groove 6, and the rubber ring 8 is sleeved and installed in the annular groove 6.

[0020] With the cooperation of the rubber ring 8 and the annular groove 6, the rubber ring 8 can be positioned and installed at the corresponding position of the groove 5 on the siphon tube 4. When gas is injected into the tank 1 through the siphon tube 4, if the gas pressure in the siphon tube 4 is too high, it will push the rubber ring 8 at the groove 5 to undergo a certain deformation, so that nitrogen gas is injected into the tank 1 through the groove 5. After the gas is stopped, the rubber ring 8 will recover under its own elasticity to seal the groove 5 again, thereby preventing nitrogen gas from entering the siphon tube 4 through the groove 5 during the use of the fire extinguisher.

[0021] Referring specifically to Figure 1, in one embodiment of this utility model, the cross-section of the rubber ring 8 is circular, and the outer wall of the rubber ring 8 is in contact with the inner wall of the annular groove 6.

[0022] By using a rubber ring 8 with a circular cross-section, when installing the rubber ring 8 on the siphon tube 4, after the rubber ring 8 is put on the siphon tube 4, the rubber ring 8 can be rolled on the surface of the siphon tube 4, thereby making it easy to move the rubber ring 8 into the annular groove 6.

[0023] Referring specifically to Figures 1 and 2, in one embodiment of this utility model, the outer wall of the siphon tube 4 is integrally formed with convex rings 7 on both the upper and lower sides of the annular groove 6, and the rubber ring 8 is located between the two convex rings 7.

[0024] By setting two convex rings 7, the groove depth of the annular groove 6 can be increased in a different direction, thereby improving the stability of the rubber ring 8 installed in the annular groove 6.

[0025] Although the present invention 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 the present invention should be included within the protection scope of the present invention.

Claims

1. A siphon tube for a dry powder fire extinguisher with a one-way inflation channel, characterized in that: Includes a siphon tube (4), the outer wall of the siphon tube (4) is provided with a slot (5) near the top, and a one-way valve mechanism is provided at the corresponding position of the outer wall of the siphon tube (4) and the slot (5).

2. The siphon tube for a dry powder fire extinguisher with a one-way inflation channel according to claim 1, characterized in that: The one-way valve mechanism includes a one-way seal, and the one-way seal is positioned on the siphon tube (4) at the corresponding position of the slot (5).

3. The siphon tube for a dry powder fire extinguisher with a one-way inflation channel according to claim 2, characterized in that: The one-way seal is a rubber ring (8). The outer wall of the siphon tube (4) is provided with an annular groove (6) near the top. The groove (5) is located in the annular groove (6). The rubber ring (8) is sleeved and installed in the annular groove (6).

4. A siphon tube for a dry powder fire extinguisher with a one-way inflation channel according to claim 3, characterized in that: The cross-section of the rubber ring (8) is circular, and the outer wall of the rubber ring (8) is in contact with the inner wall of the annular groove (6).

5. A siphon tube for a dry powder fire extinguisher with a one-way inflation channel according to claim 3, characterized in that: The outer wall of the siphon tube (4) is integrally formed with convex rings (7) on both the upper and lower sides of the annular groove (6), and the rubber ring (8) is located between the two convex rings (7).

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