A vertical dry powder canister fire extinguisher

Abstract

The vertical dry powder canister fire extinguisher provided by this utility model includes a dry powder canister, a powder outlet on the side wall of the canister, a powder outlet pipe inside the canister communicating with the powder outlet, and an air supply pipe located below the powder outlet pipe. A side branch pipe extending into the dry powder canister and equipped with a one-way valve is connected to the air supply pipe. The one-way valve includes a radial through hole on the side wall of the side branch pipe, a valve core column that can slide up and down inside the side branch pipe, a valve cover connected to the top of the side branch pipe, and a spring between the valve cover and the valve core column. This allows the outer wall of the valve core column to slide against the inner wall of the side branch pipe, and the two ends of the spring to press against the valve cover and the valve core column respectively. When the air supply pipe starts to supply air, the high-pressure gas forces the valve core column to slide to the upper working position, opening the radial through hole, allowing the dry powder to be sprayed smoothly along the powder outlet pipe. When the air supply pipe stops supplying air, the spring drives the valve core column to slide to the lower working position, closing the radial through hole and preventing dry powder from entering. The one-way valve is not prone to failure and does not affect the spraying effect of the dry powder.

Description

Technical Field

[0001] This utility model relates to the field of fire protection facilities technology, specifically to a vertical dry powder canister fire extinguisher. Background Technology

[0002] Dry powder canister fire extinguishers are common fire-fighting equipment that extinguish fires by pre-filling a dry powder canister with fire-extinguishing powder, then using a high-pressure nitrogen or carbon dioxide gas inlet to push the dry powder out of the canister and spray it outwards.

[0003] Existing dry powder canister fire extinguishers fall into two main categories: horizontal and vertical. Horizontal extinguishers are larger and are mostly used in key locations, while vertical extinguishers are relatively smaller, more flexible in deployment, and have a wider range of applications. Most existing vertical dry powder canister fire extinguishers use ball bearings to seal the valve port. For example, Chinese patent CN203408405U discloses such a dry powder canister fire extinguisher. However, in this design, the through hole is located on the valve cap, which is situated outside the ball bearing. After the ball bearing closes the valve port due to its own weight, the dry powder inside the canister can easily enter the cavity between the valve cap and the ball bearing. Over time, this can easily cause clumping and blockage, leading to uneven ball bearing operation, failure of the one-way valve, and affecting the dry powder spraying effect. Utility Model Content

[0004] The purpose of this invention is to solve one or more problems in the prior art and to provide a vertical dry powder canister fire extinguisher.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is a vertical dry powder canister fire extinguisher, comprising:

[0006] The dry powder canister includes a cylindrical canister body, an upper end cap connected to the top of the canister body, and a lower end cap connected to the bottom of the canister body. Both the upper and lower end caps are elliptical end caps. A powder filling port is provided in the center of the upper end cap, and a powder filling cap is detachably connected to the powder filling port.

[0007] The powder outlet is located on the side wall of the tank.

[0008] The powder outlet pipe is located inside the tank. The upper end of the powder outlet pipe is connected to the powder outlet of the gun, and the lower end extends downward into the lower end cap.

[0009] An air supply pipe is located below the powder outlet pipe. A side branch pipe extending upwards and into the dry powder tank is connected to the air supply pipe. A one-way valve is installed on the side branch pipe.

[0010] The one-way valve includes a radial through hole on the side wall of the side branch pipe, a valve core column that can slide up and down inside the side branch pipe, a valve cover connected to the top of the side branch pipe, and a spring between the valve cover and the valve core column. The outer wall of the valve core column slides against the inner wall of the side branch pipe. The two ends of the spring abut against the bottom surface of the valve cover and the top surface of the valve core column, respectively. The valve core column has a lower working position with the radial through hole closed and an upper working position with the radial through hole open. When the gas supply pipe starts to supply gas, the high-pressure gas forces the valve core column to slide to the upper working position, opening the radial through hole so that the dry powder can be smoothly sprayed out along the powder outlet pipe. When the gas supply pipe stops supplying gas, the spring drives the valve core column to slide to the lower working position, closing the radial through hole and preventing the dry powder from entering.

[0011] Preferably, there are multiple radial through holes, which are evenly distributed around the axis of the side branch pipe.

[0012] Preferably, the upper end face of the valve core column is provided with an annular groove to accommodate the lower end of the spring.

[0013] Preferably, the valve cover is threaded to the upper end of the side branch pipe, and adjusting the position of the valve cover in the vertical direction can adjust the magnitude of the force applied by the spring to the valve core column.

[0014] Preferably, the powder outlet pipe is offset from the centerline of the tank, and the bottom of the powder outlet pipe is connected to a downward-opening funnel-shaped guide shroud, which is lower than the radial through hole.

[0015] Preferably, one end of the air supply pipe is located outside the dry powder tank, and the other end extends horizontally along the radial direction of the tank body after passing through the lower end cap and is then closed. The end of the air supply pipe located outside the dry powder tank is connected to a plug, and the portion of the air supply pipe located inside the lower end cap is used to connect to the side branch pipe.

[0016] More preferably, there are at least two side branch pipes, which are symmetrically distributed on both sides of the tank's centerline.

[0017] Preferably, the inner diameter of the upper end of the side branch pipe is larger than the inner diameter of the lower end, and a step is formed in the side branch pipe below the valve core column, and the outer wall of the valve core column slides in contact with the inner wall of the upper end of the side branch pipe.

[0018] Preferably, the outer wall of the tank is connected to a connecting plate, the connecting plate and the powder outlet of the gun are located on the same side of the axis of the tank, and there are multiple connecting plates, all of which are higher than the powder outlet of the gun.

[0019] Preferably, the upper end cap is further provided with a vent, a pressure gauge port, and a safety valve port, the lower end cap is provided with a powder discharge port at its center, a powder discharge cover is detachably connected to the powder discharge port, and a support for supporting the dry powder tank is connected to the bottom of the lower end cap.

[0020] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0021] The vertical dry powder canister fire extinguisher provided by this utility model includes: a dry powder canister, a powder outlet on the side wall of the canister, a powder outlet pipe inside the canister communicating with the powder outlet, and an air supply pipe located below the powder outlet pipe. A side branch pipe extending into the dry powder canister is connected to the air supply pipe. A one-way valve is provided on the side branch pipe. The one-way valve includes a radial through hole on the side wall of the side branch pipe, a valve core that can slide up and down inside the side branch pipe, a valve cover connected to the top of the side branch pipe, and a valve cover and valve core. The spring between the valve core and the side branch pipe causes the outer wall of the valve core to slide against the inner wall of the side branch pipe, and the two ends of the spring press against the valve cover and valve core respectively. When the air supply pipe starts to supply air, the high pressure gas forces the valve core to slide to the upper working position, opening the inner opening of the radial through hole, so that the dry powder can be smoothly sprayed out along the powder outlet pipe. When the air supply pipe stops supplying air, the spring drives the valve core to slide to the lower working position, closing the inner opening of the radial through hole to prevent dry powder from entering. The one-way valve is not easy to fail and does not affect the spraying effect of dry powder. Attached Figure Description

[0022] Figure 1 This is a front view schematic diagram of a preferred embodiment of the present invention, with a partial cross-sectional view.

[0023] Figure 2 yes Figure 1 A top-down view.

[0024] Figure 3 yes Figure 1 A magnified view of a portion of point A, where the valve core is in the lower working position.

[0025] Figure 4 yes Figure 1 A magnified view of a portion of point A, where the valve core is in the upper working position.

[0026] The components are as follows: 10. Dry powder tank; 11. Tank body; 111. Connecting plate; 12. Upper end cap; 121. Powder filling port; 122. Powder filling cover; 123. Vent port; 124. Pressure gauge port; 125. Safety valve port; 13. Lower end cap; 131. Powder discharge port; 132. Powder discharge cover; 133. Support; 20. Powder outlet of the gun; 30. Powder discharge pipe; 31. Flow guide; 40. Air supply pipe; 41. Side branch pipe; 411. Step; 42. Plug; 50. One-way valve; 51. Radial through hole; 52. Valve core column; 521. Annular groove; 53. Valve cover; 54. Spring. Detailed Implementation

[0027] like Figures 1 to 4As shown, the vertical dry powder canister fire extinguisher provided by this utility model includes: a dry powder canister 10, a powder outlet 20, a powder outlet pipe 30, a gas supply pipe 40, and a one-way valve 50. The dry powder canister 10 includes a cylindrical canister body 11, an upper end cap 12 connected to the top of the canister body 11, and a lower end cap 13 connected to the bottom of the canister body 11. Connecting plates 111 are connected to the outer wall of the canister body 11. The connecting plates 111 and the powder outlet 20 are located on the same side of the axis of the canister body 11. There are three connecting plates 111, all of which are higher than the powder outlet 20. The upper end cap 12 and the lower end cap 13 are both elliptical end caps. A powder filling port 121 is opened at the center of the upper end cap 12. The upper end cap 12 is detachably connected to a powder filling cover 122. The upper end cap 12 also has a vent 123, a pressure gauge port 124, and a safety valve port 125. The lower end cap 13 has a powder discharge port 131 at its center, with a powder discharge cover 132 detachably connected to it. A support 133 for supporting the dry powder tank is connected to the bottom of the lower end cap 13. A powder outlet 20 is located on the side wall of the tank body 11. A powder outlet pipe 30 is located inside the tank body 11, with its upper end connected to the powder outlet 20 and its lower end extending vertically downwards into the lower end cap 13. An air supply pipe 40 is located below the powder outlet pipe 30, and an upward-extending pipe 40 extends into the dry powder tank. A side branch pipe 41 of the powder tank 10; a one-way valve 50 is disposed on the side branch pipe 41, which includes a radial through hole 51 opened in the side wall of the side branch pipe 41, a valve core 52 that can slide up and down inside the side branch pipe 41, a valve cover 53 connected to the top of the side branch pipe 41, and a spring 54 disposed between the valve cover 53 and the valve core 52. Multiple radial through holes 51 are evenly distributed around the axis of the side branch pipe 41. The outer wall of the valve core 52 slides against the inner wall of the side branch pipe 41. The valve core 52 has a lower working position that closes the inner opening of the radial through hole 51 and an upper working position that opens the radial through hole 51. The two ends of the spring 54 respectively abut against the valve cover 53. When the air supply pipe 40 starts to supply air, the high-pressure gas forces the valve core column 52 to slide to the upper working position, opening the radial through hole 51, allowing the high-pressure gas to enter the dry powder tank 10 and be released. This forces the dry powder mixed with the high-pressure gas to be smoothly sprayed out along the powder outlet pipe 30. When the air supply pipe 40 stops supplying air, the spring 54 drives the valve core column 52 to slide down to the lower working position, closing the inner opening of the radial through hole 51. The dry powder accumulates at most at the outer opening of the radial through hole 51, preventing the dry powder from entering the side branch pipe 41. This does not affect the sliding of the valve core column 52, making the one-way valve 50 less prone to failure and not affecting the dry powder spraying effect.

[0028] To facilitate the guidance of the spring 54, in this embodiment, the upper end face of the valve core column 52 is provided with an annular groove 521 to accommodate the lower end of the spring 54. To facilitate the adjustment of the force applied by the spring 54 to the valve core column 52, the valve cover 53 is further threadedly connected to the upper end of the side branch pipe 41. Rotating the valve cover 53 can adjust the position of the valve cover 53 in the vertical direction, thereby adjusting the magnitude of the force applied by the spring 54 to the valve core column 41.

[0029] To prevent the valve core 52 from falling into the air supply pipe 40, the inner diameter of the upper end of the side branch pipe 41 is larger than the inner diameter of the lower end, forming a step 411 below the valve core 52 inside the side branch pipe 41. The outer wall of the valve core 52 slides against the inner wall of the upper end of the side branch pipe 41. When the valve core 52 is in the lower working position, the bottom of the valve core 52 abuts against the step 411.

[0030] To improve the dry powder spraying effect, in this embodiment, the powder outlet pipe 30 is set off from the center line of the tank body 11. The bottom of the powder outlet pipe 30 is connected to a downwardly opening trumpet-shaped guide shroud 31. The guide shroud 31 is lower than the radial through hole 20. Furthermore, one end of the air supply pipe 40 is located outside the dry powder tank 10 and is connected to a plug 42. The other end passes through the lower end cap 13 and extends horizontally along the radial direction of the tank body 11 into the lower end cap 13 and is closed. The part of the air supply pipe 40 located inside the lower end cap is used to connect to the side branch pipe 41. At the same time, there are two side branch pipes 41, which are symmetrically distributed on both sides of the axis of the tank body 11.

[0031] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A vertical dry powder canister fire extinguisher, comprising: The dry powder canister includes a cylindrical canister body, an upper end cap connected to the top of the canister body, and a lower end cap connected to the bottom of the canister body. Both the upper and lower end caps are elliptical end caps. A powder filling port is provided in the center of the upper end cap, and a powder filling cap is detachably connected to the powder filling port. The powder outlet is located on the side wall of the tank. The powder outlet pipe is located inside the tank. The upper end of the powder outlet pipe is connected to the powder outlet of the gun, and the lower end extends downward into the lower end cap. An air supply pipe is located below the powder outlet pipe. A side branch pipe extending upwards and into the dry powder tank is connected to the air supply pipe. A one-way valve is installed on the side branch pipe. Its features are: The one-way valve includes a radial through hole on the side wall of the side branch pipe, a valve core column that can slide up and down inside the side branch pipe, a valve cover connected to the top of the side branch pipe, and a spring between the valve cover and the valve core column. The outer wall of the valve core column slides against the inner wall of the side branch pipe. The two ends of the spring abut against the bottom surface of the valve cover and the top surface of the valve core column, respectively. The valve core column has a lower working position with the radial through hole closed and an upper working position with the radial through hole open. When the gas supply pipe starts to supply gas, the high-pressure gas forces the valve core column to slide to the upper working position, opening the radial through hole so that the dry powder can be smoothly sprayed out along the powder outlet pipe. When the gas supply pipe stops supplying gas, the spring drives the valve core column to slide to the lower working position, closing the radial through hole and preventing the dry powder from entering.

2. The stand-type dry chemical powder fire extinguisher according to claim 1, characterized in that: The radial through holes are multiple and evenly distributed around the axis of the side branch pipe.

3. The stand-type dry chemical powder fire extinguisher according to claim 1, wherein: The upper end face of the valve core column is provided with an annular groove to accommodate the lower end of the spring.

4. The stand-type dry chemical powder fire extinguisher according to claim 1, characterized in that: The valve cover is threaded to the upper end of the side branch pipe. Adjusting the position of the valve cover in the vertical direction can adjust the magnitude of the force applied by the spring to the valve core column.

5. The stand-type dry chemical powder fire extinguisher according to claim 1, wherein: The powder outlet pipe is offset from the center line of the tank, and the bottom of the powder outlet pipe is connected to a downward-opening funnel-shaped guide shroud, which is lower than the radial through hole.

6. The stand-type dry chemical powder fire extinguisher according to claim 1, wherein: One end of the air supply pipe is located outside the dry powder tank, and the other end extends horizontally along the radial direction of the tank body after passing through the lower end cap and is then closed. The end of the air supply pipe located outside the dry powder tank is connected to a plug, and the portion of the air supply pipe located inside the lower end cap is used to connect to the side branch pipe.

7. The stand-type dry chemical fire extinguisher according to claim 6, wherein: There are at least two side branch pipes, which are symmetrically distributed on both sides of the tank's centerline.

8. The stand-type dry chemical powder fire extinguisher according to claim 1, wherein: The inner diameter of the upper end of the side branch pipe is larger than the inner diameter of the lower end, forming a step below the valve core column inside the side branch pipe. The outer wall of the valve core column slides in contact with the inner wall of the upper end of the side branch pipe.

9. The vertical dry powder canister fire extinguisher according to claim 1, characterized in that: The outer wall of the tank is connected to a connecting plate, which is located on the same side of the tank's axis as the powder outlet. There are multiple connecting plates, all of which are higher than the powder outlet.

10. The stand-type dry chemical fire extinguisher according to claim 1, wherein: The upper end cap is also provided with a vent, a pressure gauge port, and a safety valve port. The lower end cap is provided with a powder discharge port at its center. A powder discharge cover is detachably connected to the powder discharge port. The bottom of the lower end cap is connected with a support for supporting the dry powder tank.

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