Valve core valve for fire extinguisher and fire extinguisher

Abstract

The utility model discloses a fire extinguisher and a valve core valve for the fire extinguisher, relates to the technical field of fire extinguishers, and adopts the technical scheme that the valve core valve comprises a valve body and a valve core, an airflow channel is arranged in the valve body, and the valve core is arranged in the airflow channel; when the valve core is opened, the airflow channel is communicated; when the valve core is closed, the airflow channel is cut off; the outer side wall of the valve body is provided with a regular prism face, and the center line of the regular prism face and the center line of the threads at the two ends of the valve body are collinear. The utility model provides the valve core valve which can be mounted on the existing hand-held and trolley type fire extinguishers, the utilization rate of the head of the existing fire extinguisher is effectively improved, and the valve core valve can be connected with a pressure detection device, such as a pressure sensor and the like. When the pressure detection device detects that a pressure detection result can be converted into a signal, the signal can be connected to the Internet of Things. And when the valve core valve is not connected with the pressure detection device, the valve core is closed, so that the air leakage condition of the fire extinguisher bottle body when the pressure gauge is connected can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fire extinguishers, and more specifically, to a valve core valve for fire extinguishers and the fire extinguisher. Background Art

[0002] A pressure gauge is usually installed on the side of the fire extinguisher's spray port to indicate the pressure inside the fire extinguisher bottle. However, once the pressure gauge is damaged, it will not be able to indicate the pressure inside the fire extinguisher bottle, making the fire extinguisher unable to be used normally. Even if an external detection device is connected, the gas in the fire extinguisher bottle will leak out from the pressure gauge connection hole during the connection process, making the fire extinguisher unusable.

[0003] To this end, Chinese patent CN204403506U provides an axially connected valve core pressure gauge valve core valve, which includes a valve body, the valve body is installed at the upper end of the fire extinguisher bottle body, the left end of the valve body is an injection port, the left part of the valve body is provided with an inflation pressure indication channel, the right end of the valve body is provided with a pressure gauge connecting hole, a valve core is provided between the inflation pressure indication channel and the pressure gauge connecting hole, the injection port is connected to the inside of the fire extinguisher bottle body, the inflation pressure indication channel is connected to the inside of the fire extinguisher bottle body, and the injection port and the inflation pressure indication channel are not connected to each other.

[0004] The valve core valve is provided with a pressure gauge connection hole, which can be used to connect the pressure gauge. Once the pressure gauge is damaged, the pressure gauge connection hole can also be connected to other detection equipment, and the connection process will not cause air leakage inside the fire extinguisher bottle. Compared with the existing fire extinguisher head, the valve core valve can effectively reduce the leakage of the fire extinguisher bottle when the pressure gauge is connected, but the valve core valve is not compatible with the existing fire extinguisher head, which will lead to a large number of existing fire extinguisher heads being directly scrapped without being used, resulting in a huge waste of resources.

[0005] Therefore, for those skilled in the art, it is urgent to study a valve core valve that is compatible with the existing fire extinguisher head. Utility Model Content

[0006] In view of the problem that the valve core valve in the prior art is incompatible with the existing fire extinguisher head, the utility model provides the following technical solution: a valve core valve for a fire extinguisher, comprising a valve body and a valve core, an air flow channel is arranged inside the valve body, and the valve core is arranged in the air flow channel; when the valve core is opened, the air flow channel is connected; when the valve core is closed, the air flow channel is cut off; threads are arranged at both ends of the valve body, and the outer side wall of the valve body has a regular prism surface, and the center line of the regular prism surface is collinear with the center line of the threads at both ends of the valve body.

[0007] The utility model is further configured as follows: the threads at both ends of the valve body are external threads.

[0008] The utility model is further configured that: the major diameters of the external threads at both ends of the valve body are different.

[0009] The utility model is further configured as follows: the diameter of the inscribed circle of the regular prism surface is larger than the major diameter of the external threads at both ends of the valve body.

[0010] The utility model is further configured as follows: a protrusion for matching a wrench is arranged at one end of the core body of the valve core, and the valve core is threadedly connected to the valve body.

[0011] The utility model is further configured as follows: the valve core is a H01S type valve core.

[0012] The utility model is further configured as follows: it also includes a filter screen, the filter screen is arranged at one end of the air flow channel, and the core rod of the valve core and the filter screen are respectively located on both sides of the core body of the valve core.

[0013] The utility model is further configured as follows: the center line of the airflow channel is a straight line, and the inner diameter of the airflow channel gradually increases from one end of the core rod of the airflow channel away from the valve core to one end of the core rod of the airflow channel close to the valve core along the direction of the center line of the airflow channel.

[0014] The utility model also provides a fire extinguisher: comprising the above-mentioned valve core valve for fire extinguisher, and also comprising a fire extinguisher head and a bottle body, wherein the fire extinguisher head is arranged on the top of the bottle body, and the fire extinguisher head is threadedly connected with the valve core valve for fire extinguisher; an inflation pressure indicating channel connected to the air flow channel is arranged in the fire extinguisher head; the core rod of the valve core in the valve core valve for fire extinguisher is located on the side of the valve core away from the fire extinguisher bottle body.

[0015] The utility model is further configured to include a pressure detection device, which is threadedly connected to the valve core valve for the fire extinguisher, and the pressure detection device abuts against the core rod of the valve core to keep the valve core in an open state.

[0016] In summary, compared with the prior art, the utility model has the following beneficial effects: the utility model provides a valve core valve threadedly connected to the existing fire extinguisher head, which effectively improves the utilization rate of the existing fire extinguisher head and reduces the waste of the existing fire extinguisher head. When the valve core valve is not connected to the pressure detection device, its valve core is closed, which can effectively reduce the leakage of the fire extinguisher bottle when the pressure gauge is connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram showing the internal structure of a valve core valve used in a fire extinguisher according to an embodiment;

[0018] Figure 2It is a left side view of the valve body in the embodiment;

[0019] Figure 3 It is a structural schematic diagram of the valve core in the embodiment;

[0020] Figure 4 Schematic diagram of a fire extinguisher in an embodiment.

[0021] In the figure: 1. valve body; 11. air flow channel; 12. thread; 13. regular prism surface; 14. boss; 2. valve core; 21. core body; 22. core rod; 23. sealing sleeve; 24. core spring; 25. protrusion; 26. screw thread; 3. fire extinguisher head; 4. bottle body; 5. pressure detection device; 6. valve core valve for fire extinguisher. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] It should be noted that the terms "center", "up", "down", "horizontal", "left", "right", "front", "back", "lateral", "longitudinal", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0024] Example

[0025] like Figure 1-3 As shown, the basic structure of the valve core valve for fire extinguishers in the preferred embodiment of the utility model includes a valve body 1 and a valve core 2. An air flow channel 11 is arranged inside the valve body 1, and the valve core 2 is arranged in the air flow channel 11; when the valve core 2 is opened, the air flow channel 11 is connected; when the valve core 2 is closed, the air flow channel 11 is cut off; threads 12 are arranged at both ends of the valve body 1, and the outer wall of the valve body 1 has a regular prism surface 13, and the center line of the regular prism surface 13 is colinear with the center line of the threads 12 at both ends of the valve body 1. The valve core valve is compatible with the existing fire extinguisher head 3, effectively improving the utilization rate of the existing fire extinguisher head 3 and reducing the waste of the existing fire extinguisher head 3. When the valve core valve is not connected to the pressure detection device 5, its valve core 2 is closed, which can effectively reduce the leakage of the fire extinguisher bottle when the pressure gauge is connected.

[0026] Specifically, the regular polygon at the end of the regular prism surface 13 has 3-12 sides. In this embodiment, the regular polygon at the end of the regular prism surface 13 has 6 sides so as to be suitable for most common wrenches.

[0027] Specifically, the threads 12 at both ends of the valve body 1 are external threads, so as to directly observe the connection length between the fire extinguisher head 3 and the pressure detection device 5 and the valve core valve.

[0028] Specifically, the major diameters of the external threads at both ends of the valve body 1 are different, so as to quickly determine the direction of the valve core 2 in the valve body 1. In this embodiment, one end of the valve body 1 is connected to the fire extinguisher head 3, and its external thread specification is M10*1; the other end of the valve body 1 is connected to the pressure detection device 5, and its external thread specification is 8V1.

[0029] Specifically, the diameter of the inscribed circle of the regular prism surface 13 is larger than the major diameter of the external threads at both ends of the valve body 1, so as to facilitate the connection of a wrench.

[0030] Specifically, a protrusion 25 for matching a wrench is provided at one end of the core body 21 of the valve core 2 , and the valve core 2 is threadedly connected to the valve body 1 , so as to facilitate replacement of the valve core 2 .

[0031] Specifically, a sealing sleeve 23 is disposed outside the core body 21 of the valve core 2, and the sealing sleeve 23 is used to seal the gap between the core body 21 of the valve core 2 and the wall of the airflow channel 11, so as to improve the sealing performance between the core body 21 of the valve core 2 and the valve body 1. The sealing sleeve 23 is elastic, and the wall of the airflow channel 11 that contacts the sealing sleeve 23 is a smooth wall surface, and the sealing sleeve 23 is not embedded in the wall surface of the airflow channel 11. Figure 1 The interference state in the middle indicates that the sealing sleeve 23 is in close contact with the wall surface of the air flow channel 11, and the text description shall prevail.

[0032] Specifically, the valve core 2 in this embodiment is a H01S type valve core.

[0033] This embodiment further includes a filter screen, which is arranged at one end of the air flow channel 11, and the core rod 22 of the valve core 2 and the filter screen are respectively located on both sides of the core body 21 of the valve core 2 to prevent the powder in the fire extinguisher bottle 4 from clogging the valve core 2. The filter screen is not shown in the figure.

[0034] Specifically, in this embodiment, a boss 14 is provided at one end of the valve body 1 connected to the filter screen, and the boss 14 is used to fix the filter screen.

[0035] Specifically, the center line of the airflow channel 11 is a straight line. Along the center line direction of the airflow channel 11, from one end of the core rod 22 of the airflow channel 11 away from the valve core 2 to the end of the core rod 22 of the airflow channel 11 close to the valve core 2, the inner diameter of the airflow channel 11 gradually increases to reduce the possibility of gas colliding with the wall of the gas channel, reduce pressure loss, and improve the accuracy of pressure detection.

[0036] This embodiment also provides a fire extinguisher, such as Figure 4 It includes the above-mentioned valve core valve 6 for fire extinguisher, and also includes a fire extinguisher head 3 and a bottle body 4, the fire extinguisher head 3 is arranged on the top of the bottle body 4, and the fire extinguisher head 3 is threadedly connected with the valve core valve 6 for fire extinguisher; an inflation pressure indicating channel connected to the air flow channel 11 is arranged in the fire extinguisher head 3; the core rod 22 of the valve core 2 in the valve core valve 6 for fire extinguisher is located on the side of the valve core 2 away from the fire extinguisher bottle body 4.

[0037] Specifically, the fire extinguisher further comprises a pressure detection device 5, which is threadedly connected to the valve core valve 6 for the fire extinguisher. The pressure detection device 5 abuts against the core rod 22 of the valve core 2 to keep the valve core 2 in an open state.

[0038] Specifically, the fire extinguisher is a cart-type fire extinguisher or a portable fire extinguisher, and when the pressure detection device 5 can convert the pressure detection result into a signal, the signal can be connected to the Internet of Things. In this embodiment, the pressure detection device 5 is a pressure sensor.

[0039] In summary, this embodiment provides a valve core valve compatible with the existing fire extinguisher head 3, which effectively improves the utilization rate of the existing fire extinguisher head 3 and reduces the waste of the existing fire extinguisher head 3. When the valve core valve is not connected to the pressure detection device 5, its valve core 2 is closed, which can effectively reduce the leakage of the fire extinguisher bottle 4 when the pressure gauge is connected.

[0040] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A valve core valve for a fire extinguisher, characterized in that: The valve body (1) comprises a valve body (1) and a valve core (2), wherein an air flow channel (11) is arranged inside the valve body (1), and the valve core (2) is arranged in the air flow channel (11); when the valve core (2) is opened, the air flow channel (11) is connected; when the valve core (2) is closed, the air flow channel (11) is blocked; threads (12) are arranged at both ends of the valve body (1), and the outer wall of the valve body (1) has a regular prism surface (13), and the center line of the regular prism surface (13) is colinear with the center line of the threads (12) at both ends of the valve body (1).

2. The valve core valve for a fire extinguisher according to claim 1, characterized in that: The threads (12) at both ends of the valve body (1) are external threads.

3. The valve core valve for a fire extinguisher according to claim 2, characterized in that: The major diameters of the external threads at both ends of the valve body (1) are different.

4. The valve core valve for a fire extinguisher according to claim 2, characterized in that: The diameter of the inscribed circle of the regular prism surface (13) is larger than the major diameter of the external threads at both ends of the valve body (1).

5. A valve core valve for a fire extinguisher according to any one of claims 1 to 4, characterized in that: A protrusion (25) for matching a wrench is provided at one end of a core body (21) of the valve core (2), and the valve core (2) is threadedly connected to the valve body (1).

6. The valve core valve for a fire extinguisher according to claim 5, characterized in that: The valve core (2) is a H01S type valve core.

7. A valve core valve for a fire extinguisher according to any one of claims 1 to 4, characterized in that: It also comprises a filter screen, which is arranged at one end of the core rod (22) of the air flow channel (11) away from the valve core (2).

8. A valve core valve for a fire extinguisher according to any one of claims 1 to 4, characterized in that: The center line of the airflow channel (11) is a straight line, and the inner diameter of the airflow channel (11) gradually increases from one end of the core rod (22) of the airflow channel (11) away from the valve core (2) to one end of the core rod (22) of the airflow channel (11) close to the valve core (2).

9. A fire extinguisher, characterized in that: It comprises a valve core valve (6) for a fire extinguisher as described in any one of claims 1 to 8, and also comprises a fire extinguisher head (3) and a bottle body (4), wherein the fire extinguisher head (3) is arranged on the top of the bottle body (4), and the fire extinguisher head (3) is threadedly connected to the valve core valve (6) for the fire extinguisher; an inflation pressure indicating channel connected to the air flow channel (11) is arranged in the fire extinguisher head (3); the core rod (22) of the valve core (2) in the valve core valve (6) for the fire extinguisher is located on the side of the valve core (2) away from the fire extinguisher bottle body (4).

10. A fire extinguisher according to claim 9, characterized in that: It also comprises a pressure detection device (5), wherein the pressure detection device (5) is threadedly connected to the valve core valve (6) for the fire extinguisher, and the pressure detection device (5) abuts against the core rod (22) of the valve core (2), so that the valve core (2) remains in an open state.

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