Piston assembly tool of multi-channel fire extinguishing device

Abstract

The utility model relates to a piston assembly tool of a multi-channel fire extinguishing device. The piston assembly tool comprises an outer hole plugging piece and a cascade hole plugging piece, the outer hole plugging piece is provided with a first guide plate, a first limiting rod and a first plugging column, the first limiting rod is perpendicularly fixed to the lower plate face of the first guide plate, the first plugging column is perpendicularly fixed to the first limiting rod, and the tail end of the first plugging column is provided with a first concave arc face flush with the inner wall of the piston cavity; the cascade hole plugging piece is provided with a second guide plate, a second limiting rod and a second plugging column, the second limiting rod is vertically fixed to the lower plate face of the second guide plate, the second plugging column is vertically fixed to the second limiting rod, and the tail end of the second plugging column is provided with a second concave arc face flush with the inner wall of the piston cavity. According to the utility model, the outer hole is filled through the outer hole plugging piece, the cascade hole is filled through the cascade hole plugging piece, the contact between the piston sealing ring and the sharp edge of the hole is avoided through a physical isolation mode, the piston sealing ring cannot be cut, the assembly qualification rate of the fire extinguishing device is improved to 99%, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of piston assembly technology, specifically to a piston assembly fixture for a multi-channel fire extinguishing device. Background Technology

[0002] Patent application 202411253172.X discloses an embedded multi-channel flat fire extinguishing device, including a gas generator, a housing assembly, an outlet assembly, and a fire extinguishing agent. The housing assembly has several interconnected, parallel transverse piston chambers. The fire extinguishing agent is contained within these transverse piston chambers. One end of each transverse piston chamber is connected to a longitudinal cavity, and the other end is interconnected through vertical holes and connected to the outlet assembly. The gas generator is installed in the longitudinal cavity. Several pistons are correspondingly arranged in the transverse piston chambers near the longitudinal cavity, forming a sealed isolation between the longitudinal cavity and the transverse piston chambers. In the event of thermal runaway, the gas generator generates high-pressure gas that enters the longitudinal cavity, simultaneously pushing the pistons. These pistons then push the fire extinguishing agent in the transverse piston chambers to be ejected from the outlet assembly. This fire extinguishing device solves the problem that traditional fire extinguishing agents cannot cause damage to the circuitry or affect the normal charging and discharging of the battery after ejection. The piston is the core component of this fire extinguishing device. During piston assembly, the piston sealing ring on the piston surface is easily cut by the sharp edge of the through hole on the inner wall of the piston cavity, resulting in sealing failure, leakage of internal extinguishing agent, and posing a safety hazard. Utility Model Content

[0003] This invention addresses the problems encountered in assembling pistons in fire extinguishing devices by proposing a piston assembly fixture for multi-channel fire extinguishing devices, thereby improving the assembly qualification rate and production efficiency of fire extinguishing devices.

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

[0005] A piston assembly fixture for a multi-channel fire extinguishing device includes an external hole plugging component and a cascade hole plugging component;

[0006] The external hole sealing component is provided with a first guide plate, a first limiting rod and a first plug. The first limiting rod is vertically fixed on the lower plate surface of the first guide plate, and the first plug is vertically fixed on the first limiting rod. The end of the first plug is provided with a first concave arc surface that is flush with the inner wall of the piston cavity.

[0007] The cascaded hole sealing component is provided with a second guide plate, a second limiting rod, and a second plug. The second limiting rod is vertically fixed on the lower plate surface of the second guide plate, and the second plug is vertically fixed on the second limiting rod. The end of the second plug is provided with a second concave arc surface flush with the inner wall of the piston cavity.

[0008] Furthermore, when the first plug is inserted into the outer hole, the first guide plate is in contact with the piston insertion end of the fire extinguishing device.

[0009] Furthermore, when the second plug is inserted into the cascade hole, the second guide plate fits against the piston insertion end of the fire extinguishing device.

[0010] Furthermore, when the first concave arc surface of the first plug is flush with the inner wall of the piston chamber, the first limiting rod is in contact with the surface of the fire extinguishing device housing.

[0011] Furthermore, when the second concave arc surface of the second plug is flush with the inner wall of the piston chamber, the second limiting rod abuts against the inner wall of the adjacent piston chamber.

[0012] Furthermore, the external hole sealing component or the cascade hole sealing component is provided with an identification notch.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] This invention uses an external hole sealing component to fill the external hole and a cascade hole sealing component to fill the cascade hole. Through physical isolation, it avoids contact between the piston seal ring and the sharp edge of the hole, preventing the piston seal ring from being cut. This increases the assembly qualification rate to 99% and improves production efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the internal structure of the fire extinguishing device housing in this utility model;

[0016] Figure 2 This is a structural schematic diagram of the external hole sealing component in this utility model;

[0017] Figure 3 This is a structural schematic diagram of the cascade hole sealing component of this utility model;

[0018] Figure 4 This is a schematic diagram of the installation of this utility model and the housing of the fire extinguishing device;

[0019] Figure 5 This is a schematic diagram of the piston assembly of this utility model;

[0020] Explanation of reference numerals in the attached drawings: 1-External hole plug; 2-Cascade hole plug; 3-Housing shell; 4-Piston; 5-Piston sealing ring; 11-First guide plate; 12-First limiting rod; 13-First plug; 14-First concave arc surface; 21-Second guide plate; 22-Second limiting rod; 23-Second plug; 24-Second concave arc surface; 25-Identification notch; 31-Piston cavity; 32-Transverse cavity; 33-Cascade hole; 34-External hole. Detailed Implementation

[0021] 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 skilled in the art without creative effort are within the scope of protection of the present utility model.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Example 1:

[0025] See Figures 2 to 3 The piston assembly fixture of a multi-channel fire extinguishing device in this embodiment includes an outer hole sealing component 1 and a cascade hole sealing component 2;

[0026] The external hole sealing component 1 is provided with a first guide plate 11, a first limiting rod 12 and a first plug 13. The first limiting rod 12 is vertically fixed on the lower plate surface of the first guide plate 11, and the first plug 13 is vertically fixed on the first limiting rod 12. The end of the first plug 13 is provided with a first concave arc surface 14 that is flush with the inner wall of the piston cavity.

[0027] The cascaded hole sealing component 2 is provided with a second guide plate 21, a second limiting rod 22 and a second plug 23. The second limiting rod 22 is vertically fixed on the lower plate surface of the second guide plate 21, and the second plug 23 is vertically fixed on the second limiting rod 22. The end of the second plug 23 is provided with a second concave arc surface 24 that is flush with the inner wall of the piston cavity.

[0028] In this embodiment, the first guide plate 11 and the second guide plate 21 are both strip-shaped flat plates, the first limiting rod 12 and the second limiting rod 22 are both quadrangular prisms, the first plug 13 is a cylinder that matches the outer hole, and the second plug 23 is a cylinder that matches the cascaded hole.

[0029] See Figure 1 In this embodiment, the housing 3 of the fire extinguishing device has three longitudinal piston chambers 31 and one transverse cavity 32. The three longitudinal piston chambers 31 are parallel to each other and connected by two cascaded holes 33. One end of each piston chamber 31 is connected to the transverse cavity 32, and the other end is the piston insertion end. After the piston is assembled, the piston insertion end is sealed by a cover plate (not shown in the figure). The housing 3 has an external hole 34 through which fire extinguishing agent is injected into the piston chambers 31 inside the housing 3. After the fire extinguishing agent is injected, the external hole 34 is sealed by a diaphragm. The transverse cavity 32 is used to install a gas generator. When the fire extinguishing device is working, the gas generator generates high-pressure gas to push the piston, and the piston squeezes the fire extinguishing agent to break through the diaphragm and spray it out from the external hole.

[0030] When the piston is installed into the piston chamber, it needs to pass through the position of the outer hole or cascade hole. The piston seal ring on the piston surface is easily cut by the sharp edge of the outer hole or cascade hole on the inner wall of the piston chamber, resulting in seal failure, leakage of internal fire extinguishing agent, and posing a safety hazard.

[0031] See Figure 4 , Figure 5 In this embodiment, the outer hole 34 is filled with the outer hole sealing component 1, and the cascade hole 33 is filled with the cascade hole sealing component 2. Taking a piston cavity with an outer hole and cascade holes on the inner wall as an example, the piston assembly operation is as follows: First, the first plug 13 is aligned with the outer hole 34 and inserted, while the lower plate surface of the first guide plate 11 slides against the piston insertion end of the fire extinguishing device, ensuring that the first plug 13 only moves axially and does not rotate circumferentially during the insertion process, until the first concave arc surface 14 at the end of the first plug 13 is flush with the inner wall of the piston cavity; then, the second plug 23 is aligned with the cascade hole 33 and inserted, while the lower plate surface of the second guide plate 21 slides against the piston insertion end of the fire extinguishing device, ensuring that the second plug 23 only moves axially and does not rotate circumferentially during the insertion process, until the second concave arc surface 24 at the end of the second plug 23 is flush with the inner wall of the piston cavity. Finally, piston 4 is installed into piston chamber 31. When piston 4 passes through the outer hole and cascade hole positions, piston seal ring 5 does not contact the sharp edge of the hole and piston seal ring 5 will not be cut.

[0032] Taking a piston cavity with two cascaded holes symmetrically arranged on the inner wall as an example, two cascaded hole plugs 2 are required. The piston assembly operation is to fill the two cascaded holes 33 on the inner wall of the piston cavity with the two cascaded hole plugs 2, and finally install the piston 4 into the piston cavity 31. When the piston 4 passes through the cascaded hole position, the piston sealing ring 5 does not contact the sharp edge of the hole, and the piston sealing ring 5 will not be cut.

[0033] See Figure 2 , Figure 3 In this embodiment, when the position of the first plug 13 on the first limiting rod 12 ensures that the first plug 13 is aligned with the outer hole 34, the lower plate surface of the first guide plate 11 is in contact with the piston insertion end of the fire extinguishing device. When the position of the second plug 23 on the second limiting rod 22 ensures that the second plug 23 is aligned with the cascade hole 33, the lower plate surface of the second guide plate 21 is in contact with the piston insertion end of the fire extinguishing device.

[0034] See Figure 5 In this embodiment, to ensure that the outer hole sealing component 1 and the cascade hole sealing component 2 are installed in place, when the first concave arc surface 14 of the first plug 13 is flush with the inner wall of the piston cavity, the first limiting rod 12 is in contact with the surface of the housing 3 of the fire extinguishing device; when the second concave arc surface 24 of the second plug 23 is flush with the inner wall of the piston cavity, the second limiting rod 22 abuts against the inner wall of the adjacent piston cavity.

[0035] To facilitate the distinction between the external hole sealing component 1 and the cascade hole sealing component 2, an identification notch is provided on either the external hole sealing component or the cascade hole sealing component. In this embodiment, an identification notch 25 is provided on both the second guide plate 21 and the second limiting rod 22 of the cascade hole sealing component 2.

[0036] This invention is simple to operate. Simply insert the first and second plugs into the corresponding holes and make the end face of the plug flush with the inner wall of the piston chamber.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A piston assembly fixture for a multi-channel fire extinguishing device, characterized in that, Includes an external hole plug (1) and a cascade hole plug (2); The external hole sealing component (1) is provided with a first guide plate (11), a first limiting rod (12) and a first plug (13). The first limiting rod (12) is vertically fixed on the lower plate surface of the first guide plate (11), and the first plug (13) is vertically fixed on the first limiting rod (12). The end of the first plug (13) is provided with a first concave arc surface (14) flush with the inner wall of the piston cavity. The cascaded hole sealing component (2) is provided with a second guide plate (21), a second limiting rod (22) and a second plug (23). The second limiting rod (22) is vertically fixed on the lower plate surface of the second guide plate (21), and the second plug (23) is vertically fixed on the second limiting rod (22). The end of the second plug (23) is provided with a second concave arc surface (24) flush with the inner wall of the piston cavity.

2. The piston assembly fixture of the multi-channel fire extinguishing device according to claim 1, characterized in that, When the first plug (13) is inserted into the outer hole (34), the first guide plate (11) is in contact with the piston insertion end of the fire extinguishing device.

3. The piston assembly fixture of the multi-channel fire extinguishing device according to claim 2, characterized in that, When the second plug (23) is inserted into the cascade hole (33), the second guide plate (21) is in contact with the piston insertion end of the fire extinguishing device.

4. The piston assembly fixture of the multi-channel fire extinguishing device according to claim 1, characterized in that, When the first concave arc surface (14) of the first plug (13) is flush with the inner wall of the piston chamber, the first limiting rod (12) is in contact with the surface of the housing (3) of the fire extinguishing device.

5. The piston assembly fixture of the multi-channel fire extinguishing device according to claim 4, characterized in that, When the second concave arc surface (24) of the second plug (23) is flush with the inner wall of the piston chamber, the second limiting rod (22) abuts against the inner wall of the adjacent piston chamber.

6. The piston assembly fixture of the multi-channel fire extinguishing device according to any one of claims 1 to 5, characterized in that, The external hole plug (1) or the cascade hole plug (2) is provided with an identification notch (25).

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