Long guide composite clean discharge piston part of a cylindrical fire extinguisher

Abstract

A composite net discharge piston part of a cylindrical fire extinguisher, comprising a long guide piston body, an inner propelling plug, a capacity increasing cavity and an axial blocking ring, the long guide piston body is provided with a stepped hole structure in the center, a guide hole on the left side and a capacity increasing cavity on the right side for installing the inner propelling plug, the inner propelling plug is in sealed sliding fit with the guide hole, and the long guide piston body is also in sealed sliding fit with the cylinder body. The stability of the guide is improved by increasing the length of the guide, and the resistance phenomenon caused by the lateral deviation during the propelling process is eliminated, and the capacity of the fire extinguishing agent is not reduced under the premise of increasing the smooth guide length. The inner propelling plug arranged in the center of the piston can realize the net discharge of the fire extinguishing agent through the extrusion of the inner propelling plug when the piston is pushed to the limit position in the pressure relief state.

Description

Technical Field

[0001] This utility model relates to the field of fire extinguisher technology, specifically to a columnar fire extinguisher. Background Technology

[0002] Piston-type perfluorohexanone fire extinguishing devices are specifically designed for particular spaces, combining the fire extinguishing advantages of perfluorohexanone with the unique characteristics of a piston structure. This device rapidly detects fire sources using multiple methods, including smoke, heat, and flame detection, and delivers the extinguishing agent directly to the ignition point via a piston drive, achieving precise fire suppression. The piston structure ensures efficient delivery of the extinguishing agent and stable operation under high pressure. Its slim and compact design makes it suitable for complex locations such as power equipment, communication base stations, data centers, and new energy vehicles.

[0003] The existing piston-type perfluorohexanone fire extinguishing device is shown in the figure. It mainly consists of a front end cap 1, cylinder 2, piston assembly 3, rear end cap 4, mesh-surface explosive chamber 5, gas-generating explosive block 6, rubber stopper 7, rubber stopper base 8, rubber stopper cap 9, ignition heat-sensitive wire 10, fire extinguishing agent storage chamber for perfluorohexanone 11, ignition heat-sensitive wire 12, three-way air head 13, nozzle membrane 14, clamping nut 15, elbow 16, and atomizing nozzle 17.

[0004] The working principle of the fire extinguishing device when activated is as follows: The ignition heat-sensitive wire 12 is arranged in the protected space within the three-way vent 13. When the temperature rises or a fire breaks out on site, the ignition heat-sensitive wire 12 is ignited, which then transmits the ignition to the activation heat-sensitive wire 10, igniting the activation charge 6 and generating a large amount of high-pressure gas. This pushes the piston component 3 to move to the right. The high-temperature and high-pressure gas in the high-pressure chamber generates axial pressure on the piston component 3, thereby pushing the liquid extinguishing agent perfluorohexanone in the extinguishing agent chamber 11 to pressurize the nozzle membrane 14. When the nozzle membrane 14 ruptures, the extinguishing agent passes through the elbow 16 under the continuous push of the piston component 3 and is released from the atomizing nozzle 17.

[0005] Existing column-type fire extinguishers suffer from three problems in actual use that prevent the extinguishing agent from being completely expelled. First, the piston frequently jams during activation, preventing it from advancing properly. This can lead to incomplete extinguishing, or even complete malfunction of the extinguisher, severely impacting its effectiveness. Solving this problem requires increasing the piston's guide length. However, the length and diameter of each extinguisher's dimensions are fixed, meaning the extinguishing agent capacity is limited. Increasing the piston's guide length reduces the extinguishing agent capacity. This has been a long-standing unresolved problem in the industry.

[0006] Secondly, there is a reverse pressure relief phenomenon on the piston's advancing side, which causes the piston's advancing pressure to gradually decrease. This can also lead to the piston not being able to advance to the end, resulting in a high residual rate of extinguishing agent. This is also a long-standing problem that the industry has not yet solved.

[0007] Third, when the piston moves to near the right end, the pressure on both sides is close, which prevents the piston from being pushed all the way in, resulting in a high residual rate of extinguishing agent.

[0008] The objective of this invention is to solve the first problem: not only to ensure stable piston guidance and eliminate obstruction during propulsion, but also to ensure that the volume of extinguishing agent does not decrease or even increases while increasing the piston's guiding length. Furthermore, it aims to ensure that the extinguishing agent is completely discharged when the piston reaches its limit position, thereby significantly reducing the residual extinguishing agent rate and improving the extinguishing effect. Utility Model Content

[0009] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a long guide composite discharge piston component for a columnar fire extinguisher.

[0010] The technical solution adopted is as follows: A long guide composite discharge piston component for a cylindrical fire extinguisher includes a long guide piston body, an inner pusher, a volume-enlarging cavity, and an axial retaining ring. The long guide piston body has a stepped hole structure at its center, a guide hole on the left side, and a volume-enlarging cavity on the right side for installing the inner pusher. The inner pusher and the guide hole are in a sealed sliding fit, and the long guide piston body and the cylinder body are also in a sealed sliding fit.

[0011] Furthermore, the sealing sliding fit structure between the inner pusher and the guide hole of the long guide piston body is such that a left inner seal and a right inner seal are respectively provided on the outer circles of the left and right ends of the inner pusher.

[0012] Furthermore, the inner thruster has a T-shaped structure, with a sealing valve at the right end and a guide spindle at the left end. The outer circle of the sealing valve and the inner hole of the expansion cavity of the long guide piston body are in a sealed sliding fit, and the outer circle of the guide spindle and the guide hole of the long guide piston body are in a sealed sliding fit.

[0013] Furthermore, the sealing sliding fit structure between the long guide piston body and the cylinder body is such that a left outer seal and a right outer seal are respectively provided on the outer circles at the left and right ends of the long guide piston body.

[0014] Furthermore, the right outer seal, left inner seal, and right inner seal are all O-rings.

[0015] Furthermore, the left outer seal is a skeleton oil seal.

[0016] Furthermore, a starting buffer chamber is provided on the left side of the inner propellant to reduce the instantaneous axial force on the piston component caused by the high pressure and high gas generated instantly after the gas-producing propellant is ignited.

[0017] Furthermore, an clearance notch is provided on the right end face of the inner pusher piston, so that when the inner pusher piston is pushed to its limit position, the right end face of the inner pusher piston is flush with the right end face of the long guide piston body.

[0018] Furthermore, the long guide piston body includes a left pressure ring and a piston body. The left pressure ring is fixed on the left end face of the piston body to facilitate the machining of the skeleton oil seal groove and the installation of the skeleton oil seal.

[0019] The piston component of this structure is ideally suited to the working environment of the columnar fire extinguisher. When the columnar fire extinguisher is activated, the gas-producing block is detonated and ignited, generating high pressure gas in an instant. At this time, the piston component will be subjected to the greatest instantaneous axial force. In order to reduce the instantaneous axial force on the piston, setting an activation buffer chamber on the piston end face can achieve a good effect.

[0020] By increasing the piston guide length, the stability of the guide is improved, eliminating the obstruction caused by lateral deviation during the pushing process. The capacity of the extinguishing agent is not reduced while increasing the smooth guide length.

[0021] By placing an inner thrust plug at the center of the piston, when the piston is pushed to its limit position and the pressure is released, the extinguishing agent can be completely discharged through the squeezing of the inner thrust plug. Attached Figure Description

[0022] Figure 1 A schematic diagram of the columnar fire extinguisher using this utility model; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 A schematic diagram of the assembly structure between the long guide piston body and the inner pusher piston; Figure 4 A schematic diagram of a structure for a long guide piston body; Figure 5 This is a schematic diagram of an internal thruster.

[0023] In the diagram: 1-Front end cap; 2-Cylinder body; 3-Piston assembly; 4-Rear end cap; 5-Mesh propellant chamber; 6-Gas-generating propellant block; 7-Rubber stopper; 8-Rubber stopper base; 9-Rubber stopper cap; 10-Initiating heat-sensitive wire; 11-Extinguishing agent cavity; 12-Initiating thermal wire; 13-Three-way air head; 14-Nozzle diaphragm; 15-Pressure nut; 16-Elbow; 17-Atomizing nozzle; 21-Front end cap inner cavity; 22-Drug chamber cavity; 23-Propulsion cavity; 30-Left pressure ring; 31-Long guide piston body; 32-Right outer seal; 33-Left outer seal; 34-Inner propulsion plug; 35-Left inner seal; 36-Right inner seal; 37-Volume-increasing cavity; 38-Axial retaining ring; 39-Starting buffer cavity; 311-Guide hole; 341-Sealing valve; 342 - Guide spindle; 343 - Avoidance notch. Detailed Implementation

[0024] The specific embodiments of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] Example 1: A long guide composite discharge piston component for a cylindrical fire extinguisher, such as... Figures 1-5 As shown, the system includes a long guide piston body 31, an inner thrust plug 34, a volume-enlarging cavity 37, and an axial retaining ring 38. The long guide piston body 31 has a stepped hole structure at its center, a guide hole 311 on the left side, and a volume-enlarging cavity 37 on the right side for installing the inner thrust plug 34. The inner thrust plug 34 has a T-shaped structure, with a sealing valve 341 at its right end and a guide spindle 342 at its left end. There is a sealing sliding fit between the outer circle of the sealing valve 341 and the inner hole of the volume-enlarging cavity 37 of the long guide piston body 31. There is also a sealing sliding fit between the outer circle of the guide spindle 342 and the guide hole 311 of the long guide piston body 31. There is also a sealing sliding fit between the long guide piston body 31 and the inner hole of the cylinder body 2.

[0026] The sealing sliding fit structure between the inner pusher piston 34 and the long guide piston body 31 is as follows: Left inner seal 35 and right inner seal 36 are respectively provided on the outer circles of the left and right ends of the inner pusher 34. The inner pusher 34 has a T-shaped structure, with a sealing valve 341 at the right end and a guide spindle 342 at the left end. The outer circle of the sealing valve 341 and the inner hole of the expansion cavity 37 of the long guide piston body 31 are sealed and slidably fitted through the right inner seal 36. The outer circle of the guide spindle 342 and the guide hole 311 of the long guide piston body 31 are sealed and slidably fitted through the left inner seal 35.

[0027] The sealing sliding fit structure between the long guide piston body 31 and the cylinder body 2 is such that a left outer seal 33 and a right outer seal 32 are respectively provided on the outer circles of the left and right ends of the long guide piston body 31.

[0028] The right outer seal 32, left inner seal 35, and right inner seal 36 are all O-rings, while the left outer seal 33 is a skeleton oil seal. A starting buffer chamber 39 is provided on the left side of the inner pusher 34 to reduce the instantaneous axial force on the piston component caused by the high-pressure gas generated instantly after the gas-producing propellant is ignited. An clearance notch 343 is provided on the right end face of the inner pusher 34 so that when the inner pusher 34 is pushed to its limit position, the right end face of the inner pusher 34 is flush with the right end face of the long guide piston body 31. In this example, the long guide piston body 31 consists of a left pressure ring 30 and a piston body. The left pressure ring 30 is fixed to the left end face of the piston body to facilitate the machining of the skeleton oil seal groove and the installation of the skeleton oil seal.

[0029] Figure 1 This is a clean-discharge type columnar fire extinguisher. The piston component of this invention is used in this columnar fire extinguisher, and its structure is as follows: Figure 1-5 As shown, the device includes a front end cap 1, a cylinder body 2, a piston assembly 3, a rear end cap 4, a mesh-surface explosive chamber 5, a gas-generating explosive block 6, a rubber stopper 7, a rubber stopper base 8, a rubber stopper cap 9, a starting thermal wire 10, an extinguishing agent chamber 11, an initiation thermal wire 12, a three-way air nozzle 13, a nozzle membrane 14, a clamping nut 15, an elbow 16, and an atomizing nozzle 17. The piston assembly 3 is the present invention.

[0030] After the fire extinguisher is activated, the ignition heat-sensitive wire 12 begins to burn, which then ignites the activation heat-sensitive wire 10, and finally detonates the gas-generating explosive block 6. Because the through hole in the middle of the rubber stopper 7 will automatically close due to its own elasticity after the activation heat-sensitive wire 10 burns, a large amount of high-temperature and high-pressure gas will be produced in the propulsion chamber 23 due to the ignition of the gas-generating explosive block 6, filling the explosive chamber 22 and the propulsion chamber 23. At this time, the high-temperature and high-pressure gas in the propulsion chamber 23 will generate the maximum instantaneous axial force on the piston component 3. In order to reduce the instantaneous axial force on the piston, an activation buffer chamber 39 is set on the piston end face, which can play a good buffering role.

[0031] By increasing the piston guide length, the stability of the guide is improved, eliminating the obstruction caused by lateral deviation during the pushing process. The capacity of the extinguishing agent is not reduced while increasing the smooth guide length.

[0032] By setting an inner thrust plug 34 at the center of the piston, when the piston is pushed to its limit position and in a depressurized state, the extinguishing agent can be completely discharged through the compression of the inner thrust plug 34.

Claims

1. A long guide composite discharge piston component for a cylindrical fire extinguisher, characterized in that: It includes a long guide piston body (31), an inner pusher (34), a volume-enlarging cavity (37) and an axial retaining ring (38). The long guide piston body (31) has a stepped hole structure at the center, a guide hole (311) on the left side and a volume-enlarging cavity (37) on the right side for installing the inner pusher (34). The inner pusher (34) and the guide hole (311) are in a sealed sliding fit. The long guide piston body (31) and the cylinder body (2) are also in a sealed sliding fit.

2. The long guide composite discharge piston component of a columnar fire extinguisher according to claim 1, characterized in that: The sealing sliding fit structure between the inner pusher (34) and the guide hole (311) of the long guide piston body (31) is such that a left inner seal (35) and a right inner seal (36) are respectively provided on the outer circles of the left and right ends of the inner pusher (34).

3. The long guide composite discharge piston component of a columnar fire extinguisher according to claim 1, characterized in that: The inner thruster (34) has a T-shaped structure, with a sealing valve (341) at the right end and a guide spindle (342) at the left end. The outer circle of the sealing valve (341) and the inner hole of the expansion cavity (37) of the long guide piston body (31) are in a sealed sliding fit. The outer circle of the guide spindle (342) and the guide hole (311) of the long guide piston body (31) are in a sealed sliding fit.

4. The long guide composite discharge piston component of a columnar fire extinguisher according to claim 1, characterized in that: The sealing sliding fit structure between the long guide piston body (31) and the cylinder body (2) is such that a left outer seal (33) and a right outer seal (32) are respectively provided on the outer circles of the left and right ends of the long guide piston body (31).

5. The long guide composite discharge piston component of a columnar fire extinguisher according to claim 2 or 4, characterized in that: The right outer seal (32), the left inner seal (35), and the right inner seal (36) are all O-rings.

6. The long guide composite discharge piston component of a columnar fire extinguisher according to claim 4, characterized in that: The left outer seal (33) is a skeleton oil seal.

7. The long guide composite discharge piston component of a columnar fire extinguisher according to claim 1, characterized in that: A starting buffer chamber (39) is provided on the left side of the inner propellant (34) to reduce the instantaneous axial force on the piston component caused by the high pressure and high gas generated instantly after the gas-producing block is ignited.

8. The long guide composite discharge piston component of a columnar fire extinguisher according to claim 1, characterized in that: An clearance notch (343) is provided on the right end face of the inner pusher (34). When the inner pusher (34) is pushed to the limit position, the right end face of the inner pusher (34) is flush with the right end face of the long guide piston body (31).

9. The long guide composite discharge piston component of a columnar fire extinguisher according to claim 1, characterized in that: The long guide piston body (31) includes a left pressure ring (30) and a piston body, with the left pressure ring (30) fixed to the left end face of the piston body.

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