Valve for fire extinguisher

Abstract

The valve comprises a valve body, and a piston cavity, a fire extinguishing agent spraying channel, a fire extinguishing agent leading-out channel and a limiting cavity which are communicated with one another are arranged in the valve body; the valve element comprises a piston part connected into the piston cavity in a sealed and sliding mode and a piston rod part connected to the piston part and sliding along with the piston part, the lower end of the piston rod part extends into the limiting cavity, a stop structure is arranged at the lower end of the piston rod part, and a limiting structure abutting against the stop structure is arranged in the limiting cavity. The sliding position of the piston part comprises a first position for blocking the fire extinguishing agent spraying channel and a second position for communicating the fire extinguishing agent leading-out channel with the fire extinguishing agent spraying channel, and the piston part slides to the second position from the first position after being pushed by pressure from the fire extinguishing agent leading-out channel; the stop structure is configured to limit sliding of the piston part after abutting against the limiting structure so as to lock the piston part at the second position. The problem that an existing fire extinguishing valve is difficult to control the discharge capacity of a fire extinguishing agent is solved.

Description

Technical Field

[0001] This utility model relates to the field of fire extinguisher technology, and in particular to a valve for fire extinguishers. Background Technology

[0002] Container valves, also known as cylinder head valves, are a key component installed at the head of fire cylinders, primarily used to seal and release the extinguishing agent within. The design and function of container valves are crucial for ensuring the safety and effectiveness of fire suppression systems. Container valves are widely used in various fire suppression systems, such as IG-541 gas extinguishing systems and heptafluoropropane extinguishing systems. In these systems, container valves control the release of the extinguishing agent, ensuring rapid and effective extinguishing of flames in the event of a fire. In existing technologies, during the use of container valves for extinguishing agents, the extinguishing agent is sprayed from the nozzle after the valve core is activated; however, the discharge rate of the extinguishing agent is difficult to control, presenting certain limitations. Utility Model Content

[0003] To address the shortcomings of the existing technology, this utility model provides a valve for fire extinguishers to solve the problem that existing fire extinguishing valves are not good at controlling the discharge of extinguishing agent.

[0004] This utility model is achieved using the following technical solution:

[0005] A valve for a fire extinguisher, comprising:

[0006] The valve body is provided with an interconnected piston chamber, an extinguishing agent spraying channel, an extinguishing agent outlet channel, and a limiting chamber.

[0007] The valve core includes a piston portion that is slidably connected to a piston chamber and a piston rod portion that is connected to the piston portion and slides with the piston portion. The lower end of the piston rod portion extends into the limiting cavity. The lower end of the piston rod portion is provided with a stop structure. The limiting cavity is provided with a limiting structure that abuts against the stop structure. The sliding position of the piston portion includes a first position that blocks the extinguishing agent discharge channel and a second position that connects the extinguishing agent outlet channel with the extinguishing agent discharge channel. After being pushed by pressure from the extinguishing agent outlet channel, the piston portion slides from the first position to the second position. The stop structure is configured to abut against the limiting structure and restrict the sliding of the piston portion to lock the piston portion in the second position.

[0008] Furthermore, the stop structure and the piston rod are connected by a thread.

[0009] Furthermore, the stop structure is a limiting nut, and the piston rod is provided with an external thread that mates with the limiting nut.

[0010] Furthermore, the limiting structure is a limiting buckle, which includes a circular plate portion. The center of the circular plate portion is provided with a through hole for the piston rod portion to pass through. The edge of the circular plate portion is provided with multiple axially extending protrusions. The multiple protrusions are arranged sequentially at intervals along the circumference of the circular plate portion. The outer wall of the protrusions is in tight contact with the inner wall of the limiting cavity.

[0011] Furthermore, the outer peripheral wall of the piston portion is provided with a second sealing ring that seals with the inner peripheral wall of the extinguishing agent outlet channel.

[0012] Furthermore, the valve body is provided with an actuating component for activating the valve core. The actuating component includes an actuating body and a supporting member. The actuating body includes a connecting part connected to the valve body and a handle part disposed above the connecting part. The connecting part has a connecting cavity communicating with the piston cavity. The top surface of the connecting part is provided with an opening communicating with the connecting cavity. The upper end of the piston part extends axially into the connecting cavity and its top end is provided with a piston cover that seals with the opening. A sleeve is fitted outside the piston part. The sleeve is limited by a step inside the connecting cavity, and the sleeve of the piston part seals the piston cavity with the connecting cavity. The supporting member is vertically installed between the piston cover and the handle part. One end of the supporting member abuts against the piston cover, and the other end of the supporting member abuts against the handle part.

[0013] Furthermore, the support member is made of thermosensitive glass column.

[0014] Furthermore, an O-ring is provided between the piston cover and the opening, and a first sealing ring is provided on the outer peripheral wall of the piston portion to seal against the inner peripheral wall of the sleeve.

[0015] Furthermore, the upper surface of the piston cover is provided with a groove, and the bottom of the support member is provided with a pointed tip, which is inserted into the groove.

[0016] Furthermore, the handle portion is provided with a clamping member, which can move up and down relative to the handle portion, and the lower end of the clamping member is provided with a support surface that cooperates with the top of the support member.

[0017] Compared with the prior art, the beneficial effects of this utility model include at least the following:

[0018] The valve body of this invention is installed at the outlet of the extinguishing agent storage container. The extinguishing agent outlet channel is connected to the extinguishing agent storage container. When the valve core is not activated, the piston is in the first position, at which point the extinguishing agent outlet channel is blocked by the piston. When the valve core is activated, the high-pressure gas from the extinguishing agent storage container enters the extinguishing agent outlet channel, causing the piston to be pushed by the pressure from the extinguishing agent outlet channel from the first position to the second position. When the stop structure of the piston rod abuts against the limiting structure, the piston stops moving, making the extinguishing agent outlet channel and the extinguishing agent outlet channel fully connected, allowing the extinguishing agent in the extinguishing agent storage container to be sprayed out from the extinguishing agent outlet channel. Through the design of the stop structure and the limiting structure, the displacement of the piston can be flexibly controlled, facilitating the adjustment of the opening of the extinguishing agent outlet channel and realizing the adjustment of the extinguishing agent spray volume. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a valve for a fire extinguisher according to an embodiment of the present utility model;

[0020] Figure 2 This is a cross-sectional view of a valve for a fire extinguisher according to an embodiment of this utility model;

[0021] In the diagram: 1. Valve body; 11. Piston chamber; 12. Extinguishing agent discharge channel; 13. Extinguishing agent outlet channel; 14. Limiting chamber; 2. Valve core; 21. Piston part; 22. Piston rod part; 23. Stop structure; 24. Piston cover; 25. Sleeve; 26. O-ring seal; 27. First sealing ring; 28. Second sealing ring; 3. Limiting structure; 31. Circular plate part; 32. Through hole; 4. Activating component; 41. Activating body; 411. Connecting part; 4110. Connecting cavity; 4111. Opening; 4112. Step; 412. Handle part; 42. Support component; 421. Pointed end; 43. Clamping component; 5. Nozzle connector. Detailed Implementation

[0022] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0023] The terms used to describe position and direction in this utility model are illustrated with the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this utility model.

[0024] like Figure 1 and Figure 2As shown, this utility model provides a valve for a fire extinguisher, comprising:

[0025] Valve body 1, wherein the valve body 1 is provided with an interconnected piston chamber 11, a fire extinguishing agent spraying channel 12, a fire extinguishing agent outlet channel 13 and a limiting chamber 14;

[0026] The valve core 2 includes a piston portion 21 that is slidably connected to a piston chamber 11 and a piston rod portion 22 that is connected to the piston portion 21 and slides with the piston portion 21. The lower end of the piston rod portion 22 extends into the limiting cavity 14. The lower end of the piston rod portion 22 is provided with a stop structure 23. The limiting cavity 14 is provided with a limiting structure 3 that abuts against the stop structure 23. The sliding position of the piston portion 21 includes a first position that blocks the extinguishing agent discharge channel 12 and a second position that connects the extinguishing agent outlet channel 13 with the extinguishing agent discharge channel 12. After being pushed by the pressure from the extinguishing agent outlet channel 13, the piston portion 21 slides from the first position to the second position. The stop structure 23 is configured to abut against the limiting structure 3 to restrict the sliding of the piston portion 21, thereby locking the piston portion 21 in the second position.

[0027] In this embodiment, the valve body 1 is installed at the outlet of the extinguishing agent storage container, the extinguishing agent outlet channel 13 is connected to the extinguishing agent storage container, and the extinguishing agent spraying channel 12 is connected to the nozzle connector 5. When the valve core 2 is not activated, the piston part 21 is in the first position. At this time, the extinguishing agent spraying channel 12 is blocked by the piston part 21. When the valve core 2 is activated, the high-pressure gas in the extinguishing agent storage container enters the extinguishing agent outlet channel 13, causing the piston part 21 to be pushed by the pressure from the extinguishing agent outlet channel 13 to move from the first position to the second position. When the stop structure 23 of the piston rod part 22 abuts against the limiting structure 3, the piston part 21 stops moving, so that the extinguishing agent outlet channel 13 and the extinguishing agent spraying channel 12 are fully connected, and the extinguishing agent in the extinguishing agent storage container is sprayed out from the extinguishing agent spraying channel 12. The design of the stop structure 23 and the limiting structure 3 allows for flexible control of the displacement of the piston part 21, facilitating the adjustment of the opening of the extinguishing agent spray channel 12 and realizing the adjustment of the extinguishing agent spray volume.

[0028] In a preferred embodiment, the stop structure 23 and the piston rod portion 22 are connected by a thread.

[0029] In a preferred embodiment, the stop structure 23 is a limiting nut, and the piston rod portion 22 is provided with external threads that mate with the limiting nut. In this embodiment, the limiting nut and the piston rod portion 22 are assembled by threads, achieving quick assembly and disassembly, and the position of the limiting nut on the piston rod portion 22 can be flexibly adjusted, making it highly practical.

[0030] In a preferred embodiment, the limiting structure 3 includes a circular plate portion 31, the center of which is provided with a through hole 32 for the piston rod portion 22 to pass through, and the diameter of the stop structure 23 is larger than the diameter of the through hole 32.

[0031] In this embodiment, the through hole 32 is provided so as not to interfere with the vertical movement of the piston rod 22. The diameter of the stop structure 23 is larger than the diameter of the through hole 32. When the stop structure 23 abuts against the lower surface of the circular plate 31, it can restrict the piston 21 from continuing to move upward. This limiting structure 3 has the characteristics of simple structure and convenient processing.

[0032] In a preferred embodiment, the outer peripheral wall of the piston portion 21 is provided with a second sealing ring 28 that seals against the inner peripheral wall of the extinguishing agent outlet channel 13. The second sealing ring 28 ensures the sealing between the extinguishing agent outlet channel 13 and the extinguishing agent outlet channel 13 when the piston portion 21 is in the first position, preventing extinguishing agent leakage.

[0033] In a preferred embodiment, the valve body 1 is provided with an actuating component 4 for actuating the valve core 2. The actuating component 4 includes an actuating body 41 and a supporting member 42. The actuating body 41 includes a connecting portion 411 connected to the valve body 1 and a handle portion 412 disposed above the connecting portion 411. The connecting portion 411 has a connecting cavity 4110 communicating with the piston cavity 11. The top surface of the connecting portion 411 is provided with an opening 4111 communicating with the connecting cavity 4110. The upper end of the piston portion 21 extends axially to the connecting cavity 11. A piston cover 24 is provided inside the cavity 4110 and at its top end to seal with the opening 4111. A sleeve 25 is sleeved on the outside of the piston part 21. The sleeve 25 is limited by the step 4112 inside the cavity 4110, and the sleeve 25 of the piston part 21 seals the piston cavity 11 with the cavity 4110. The support member 42 is vertically installed between the piston cover 24 and the handle part 412. One end of the support member 42 abuts against the piston cover 24, and the other end of the support member 42 abuts against the handle part 412.

[0034] In this embodiment, the support member 42 is made of a brittle or tough material in the shape of a column or tube with a certain strength. When a fire occurs, the temperature rises, causing the support to crack, break, or deform. This causes the piston part 21 to lose the support of the support member 42 and slide from the first position to the second position under the drive of the high-pressure extinguishing agent gas sealed in the extinguishing agent outlet channel 13 and the extinguishing agent storage container. This connects the extinguishing agent outlet channel 13 with the extinguishing agent spraying channel 12, allowing the extinguishing agent to be released through the extinguishing agent spraying channel 12 to extinguish the fire. During the upward movement of the piston part 21, the upward-spraying extinguishing agent is blocked by the sleeve 25, preventing it from spraying upwards.

[0035] In a preferred embodiment, the support member 42 is a thermosensitive glass column.

[0036] In this embodiment, when a fire causes the temperature to rise to the bursting temperature of the thermosensitive glass column, the thermosensitive glass column bursts, the valve core 2 is opened, and the extinguishing agent is released.

[0037] In a preferred embodiment, an O-ring 26 is provided between the piston cover 24 and the opening 4111, and a first sealing ring 27 is provided on the outer peripheral wall of the piston part 21 to seal against the inner peripheral wall of the sleeve 25. The O-ring 26 ensures good sealing performance of the piston cavity 11, and the first sealing ring 27 ensures good sealing performance between the piston cavity 11 and the connecting cavity 4110.

[0038] In a preferred embodiment, the upper surface of the piston cover 24 is provided with a groove, and the bottom of the support member 42 is provided with a pointed tip 421, which is inserted into the groove. The groove facilitates the vertical installation of the support member 42 between the piston cover 24 and the handle portion 412.

[0039] In a preferred embodiment, the handle portion 412 is provided with a pressing member 43, which can move up and down relative to the handle portion 412, and the lower end of the pressing member 43 is provided with a supporting surface that cooperates with the top of the support member 42.

[0040] In this embodiment, the handle 412 is provided with a mounting part for mounting the clamping member 43. The mounting part is connected to the clamping member 43 by a thread. By rotating the clamping member 43, the clamping member 43 can be moved up and down, thereby pressing the support member 42 onto the piston cover 24. The abutting surface of the clamping member 43 is adapted to the top of the support member 42, which facilitates the vertical installation of the support member 42 between the clamping member 43 and the piston cover 24.

[0041] In a preferred embodiment, the connecting part 411 is connected to the valve body 1 by a thread. This facilitates quick assembly and disassembly of the actuating component 4 and the valve body 1, achieving a quick-disassembly and quick-installation effect.

[0042] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A valve for a fire extinguisher, characterized in that, include: The valve body (1) is provided with an interconnected piston chamber (11), an extinguishing agent spraying channel (12), an extinguishing agent outlet channel (13), and a limiting chamber (14); The valve core (2) includes a piston portion (21) that is slidably connected to the piston chamber (11) and a piston rod portion (22) that is connected to the piston portion (21) and slides with the piston portion (21). The lower end of the piston rod portion (22) extends into the limiting cavity (14). The lower end of the piston rod portion (22) is provided with a stop structure (23). The limiting cavity (14) is provided with a limiting structure (3) that abuts against the stop structure (23). The sliding of the piston portion (21) The positions include a first position that blocks the extinguishing agent discharge channel (12) and a second position that connects the extinguishing agent outlet channel (13) with the extinguishing agent discharge channel (12). After being pushed by the pressure from the extinguishing agent outlet channel (13), the piston part (21) slides from the first position to the second position. The stop structure (23) is configured to resist the piston part (21) after abutting against the limiting structure (3) to restrict the sliding of the piston part (21) and lock the piston part (21) in the second position.

2. The valve for a fire extinguisher according to claim 1, characterized in that, The stop structure (23) and the piston rod (22) are connected by threads.

3. The valve for a fire extinguisher according to claim 2, characterized in that, The stop structure (23) is a limiting nut, and the piston rod (22) is provided with an external thread that cooperates with the limiting nut.

4. The valve for a fire extinguisher according to claim 1, characterized in that, The limiting structure (3) includes a circular plate portion (31), the center of which is provided with a through hole (32) through which the piston rod portion (22) passes, and the diameter of the stop structure (23) is larger than the diameter of the through hole (32).

5. The valve for a fire extinguisher according to claim 1, characterized in that, The piston part (21) has a second sealing ring (28) on its outer peripheral wall that is in sealing fit with the inner peripheral wall of the fire extinguishing agent outlet channel (13).

6. The valve for a fire extinguisher according to claim 1, characterized in that, The valve body (1) is provided with an actuating component (4) for actuating the valve core (2). The actuating component (4) includes an actuating body (41) and a supporting member (42). The actuating body (41) includes a connecting part (411) connected to the valve body (1) and a handle part (412) disposed above the connecting part (411). The connecting part (411) has a connecting cavity (4110) communicating with the piston cavity (11). The top surface of the connecting part (411) is provided with an opening (4111) communicating with the connecting cavity (4110). The upper end of the piston part (21) extends axially to the connecting cavity (411). The piston part (21) is provided with a piston cover (24) at its top end, which is sealed to the opening (4111). A sleeve (25) is provided on the outside of the piston part (21). The sleeve (25) is limited by the step (4112) inside the connecting cavity (4110). The sleeve (25) of the piston part (21) makes the piston cavity (11) and the connecting cavity (4110) form a seal. The support member (42) is vertically installed between the piston cover (24) and the handle part (412). One end of the support member (42) abuts against the piston cover (24), and the other end of the support member (42) abuts against the handle part (412).

7. The valve for a fire extinguisher according to claim 6, characterized in that, The support member (42) is a thermosensitive glass column.

8. The valve for a fire extinguisher according to claim 6, characterized in that, An O-ring (26) is provided between the piston cover (24) and the opening (4111), and a first sealing ring (27) is provided on the outer peripheral wall of the piston part (21) to seal against the inner peripheral wall of the sleeve (25).

9. The valve for a fire extinguisher according to claim 6, characterized in that, The piston cap (24) has a groove on its upper surface, and the support member (42) has a pointed tip (421) at its bottom, which is inserted into the groove.

10. The valve for a fire extinguisher according to claim 6, characterized in that, The handle (412) is provided with a clamping member (43), which can move up and down relative to the handle (412). The lower end of the clamping member (43) is provided with a support surface that cooperates with the top of the support member (42).

Images