A pressure resistance explosion test tool for an aerosol valve

Abstract

The utility model discloses a kind of gas mist valve pressure resistance explosion test tool, including detachably connected fixed seat and seat cover, and branch pipe connected with fixed seat;Fixed seat is formed with the accommodating chamber of accommodating gas mist valve inside;Branch pipe has first branch part for connecting pressure gauge, second branch part for connecting external pressure-increasing equipment, and branch pipe part for connecting fixed seat between first branch part and second branch part;Valve is provided in first branch part and second branch part;The utility model can carry out pressure resistance and explosion test to gas mist valve respectively by the valve opening and closing state of two branch parts, without setting tool respectively, improve test convenience, reduce test cost.

Description

Technical Field

[0001] This utility model relates to the technical field of pressure burst test fixtures, and in particular to a pressure burst test fixture for an aerosol valve. Background Technology

[0002] The aerosol valve of an aerosol canister fire extinguisher differs significantly from that of a traditional fire extinguisher valve in its structural and functional design. Traditional fire extinguisher valves utilize water pressure and bursting fixtures, primarily designed for large-capacity canisters and rigid valve structures, testing their sealing performance with high-pressure water flow and their pressure-bearing limits with bursting pressure. The working principle of aerosol valves relies on precision microchannels and low-pressure atomization spray systems. Their materials are lighter and thinner, and their structure is more intricate, making them unable to withstand the high-intensity pressure impacts generated by traditional tooling. Forced use can lead to deformation and sealing failure, and may even cause irreversible damage to the internal structure. This difference in technological compatibility means that tooling used for traditional fire extinguisher valves cannot be directly applied to aerosol valves. However, even with these technical compatibility differences, all materials purchased for the production of aerosol canister fire extinguishers must strictly adhere to inspection standards. Only materials that pass comprehensive quality testing and are deemed qualified can be used in the actual production process. Currently, two toolings are generally used to conduct pressure resistance and burst tests on aerosol valves separately. These two toolings are not interchangeable, increasing testing costs and requiring the aerosol valve to be disassembled and reassembled on both toolings, reducing testing efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a pressure resistance and burst test fixture for aerosol valves, which eliminates the need for separate fixtures to perform pressure resistance and burst tests on aerosol valves, thereby improving testing convenience and reducing testing costs.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A pressure burst test fixture for an aerosol valve includes a detachably connected fixed base and a base cover, and a branch pipe connecting the fixed base; the fixed base has an internal chamber for accommodating the aerosol valve; the branch pipe has a first branch for connecting a pressure gauge, a second branch for connecting an external pressurizing device, and a branch pipe located between the first and second branches for connecting the fixed base; valves are provided at the first and second branches.

[0006] Based on the above technical solution, the present invention can be improved as follows:

[0007] Furthermore, the fixing seat has an annular step at the seat opening. When the aerosol valve is placed into the receiving chamber, the edge of the aerosol valve overlaps the annular step. The seat cover is placed at the seat opening and abuts against the edge of the aerosol valve.

[0008] Furthermore, the fixing base has an opening on its bottom wall that communicates with the accommodating chamber, and a connecting part for detachably connecting the branch pipe is provided at the opening.

[0009] Furthermore, the seat cover has an clearance hole on its top wall. The clearance hole is used to form a space for the elastic valve cap of the aerosol valve to deform and release the water in the accommodating chamber to complete the depressurization when the aerosol valve bursts.

[0010] Furthermore, the branch pipe includes a straight section and a vertical section perpendicular to the straight section; wherein, the vertical section of the branch pipe is a branch pipe portion, and the two ends of the straight section are the first branch portion and the second branch portion, respectively.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] This invention creates a receiving chamber inside a fixed base to house the aerosol valve. By installing a branch pipe on the fixed base, with the first branch pipe connected to a pressure gauge and the second branch pipe connected to an external pressurization device, the aerosol valve can be subjected to pressure resistance and burst tests by operating the valves at the two branch pipes. This eliminates the need for separate tooling, improving testing convenience and reducing testing costs. Attached Figure Description

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a schematic diagram of the structure of the pressure resistance and burst test fixture for the aerosol valve in the embodiment;

[0015] Figure 2 This is a schematic diagram of the structure of the mounting base and cover after disassembly and assembly in the embodiment.

[0016] The markings on the attached diagram are as follows: 1-fixed seat, 101-annular step portion, 102-connecting portion, 2-seat cover, 3-branch pipe, 301-first branch portion, 302-second branch portion, 303-branch pipe portion, 4-pressure gauge, 5-aerosol valve, 501-valve core, 502-elastic valve cap, 503-edge portion, 6-clearance hole, 7-first valve, 8-second valve. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. These descriptions are intended to aid in understanding the utility model but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0018] See Figure 1 and Figure 2 This embodiment relates to a pressure resistance and burst test fixture for an aerosol valve, including a detachably connected fixed base 1 and a base cover 2, and a branch pipe 3 connecting the fixed base 1; the fixed base 1 forms a receiving chamber for accommodating the aerosol valve 5; the branch pipe 3 has a first branch portion 301 and a second branch portion 302 communicating with the internal cavity, and a branch pipe portion 303 located between the first branch portion 301 and the second branch portion 302; the first branch portion 301 is used to connect a pressure gauge 4, the second branch portion 302 is used to connect an external pressurizing device, and the branch pipe portion 303 is used to connect the fixed base 1; valves are provided at the first branch portion 301 and the second branch portion 302; after water is pressurized by the external pressurizing device, it enters the branch pipe 3 from the second branch portion 302 and flows to the first branch portion 301 and the branch pipe portion 303 respectively; by operating the opening and closing states of the valves at the two branch portions, pressure resistance and burst tests are performed on the aerosol valve 5 respectively.

[0019] The aerosol valve 5 tested in this embodiment includes a valve core 501 and an elastic valve cap 502 connected to the top of the valve core 501. The elastic valve cap 502 can be elastically deformed when subjected to pressure, and an annular edge portion 503 is formed on the outer peripheral side of the elastic valve cap 502.

[0020] Specifically, the fixing seat 1 is a hollow circular cylinder structure with a bottom wall and an annular side wall. The bottom wall and the annular side wall form a receiving chamber. The fixing seat 1 forms a seat opening at the top that communicates with the receiving chamber. The aerosol valve 5 is inserted into the receiving chamber through this seat opening. The seat cover 2 is placed on the seat opening and abuts against the aerosol valve 5. The fixing seat 1 is provided with an annular step portion 101 at the seat opening. When the aerosol valve 5 is inserted into the receiving chamber, the edge portion 503 of the aerosol valve 5 overlaps on the annular step portion 101.

[0021] The fixing seat 1 has an external thread on the outer side of the annular sidewall to facilitate threaded connection with the seat cover 2; the fixing seat 1 has an opening in the bottom wall that connects to the accommodating chamber, and a connecting part 102 is provided at the opening. The fixing seat 1 is threadedly connected to the branch pipe 303 on the branch pipe 3 through the connecting part 102; the connecting part 102 is cylindrical, and a threaded through hole is provided in the connecting part 102, which connects to the opening and has an internal thread.

[0022] The seat cover 2 is a circular cover structure with a top wall and annular side walls, and a cover opening at the bottom. The bottom cover has an internal thread on the inner side of the annular side wall. The internal thread on the bottom cover and the external thread on the fixed seat 1 cooperate with each other so that the bottom cover can be detachably placed on the seat opening of the base. The top wall of the bottom cover abuts against the edge 503 of the aerosol valve 5, which overlaps the annular step 101 of the fixed seat 1. The seat opening of the fixed seat 1 is sealed by the elastic valve cap 502 of the aerosol valve 5. The water is intercepted in the accommodating chamber inside the fixed seat 1 and pressurizes the aerosol valve 5. The elastic valve cap 502 of the aerosol valve 5 bulges upward and deforms after being pressed. The seat cover 2 has a relief hole 6 on the top wall. The relief hole 6 is used to form a space for the elastic valve cap 502 of the aerosol valve 5 to deform and release the water in the accommodating chamber to complete the depressurization when the aerosol valve 5 bursts.

[0023] The branch pipe 3 is a T-shaped three-way pipe structure, including a straight section and a vertical section perpendicular to the straight section; wherein, the vertical section of the branch pipe 3 is a branch pipe 303, and the two ends of the straight section are a first branch section 301 and a second branch section 302, respectively; the branch pipe 303 is provided with an external thread on the outside, and the external thread on the branch pipe 303 and the internal thread on the threaded through hole are threadedly engaged with each other, so that the connecting part 102 of the fixed seat 1 and the branch pipe 303 of the branch pipe 3 can be detachably connected.

[0024] The first valve 7 is threadedly connected at the first tap 301, and the second valve 8 is threadedly connected at the second tap 302; the first valve 7 is threadedly connected to the pressure gauge 4, and the second valve 8 is threadedly connected to the pipeline for connecting to the external pressurization equipment; both the first valve 7 and the second valve 8 are manual valves in the prior art, the pressure gauge 4 is a pressure gauge in the prior art, and the external pressurization equipment is a hydraulic blasting machine in the prior art, which can adjust the water supply pressure.

[0025] During the pressure test, the first valve 7 and the second valve 8 are opened, and the hydraulic rupture machine is adjusted to the preset pressure value and pressurized to supply water. The pressurized water enters the branch pipe 3 from the second branch section 302. The hydraulic rupture machine continues to supply water while maintaining the preset pressure value. When the pressure value on the pressure gauge 4 is the same as the preset pressure value, the second valve 8 is closed, and the first valve 7 remains open. At this time, the leakage of the aerosol valve 5 is judged by observing the pressure value change on the pressure gauge 4. After the specified pressure holding time, the pressure value on the pressure gauge 4 remains unchanged, that is, there is no leakage in the aerosol valve 5, and the pressure test is completed.

[0026] During the burst test, the first valve 7 is closed and the second valve 8 is opened. The hydraulic bursting machine is adjusted to the initial pressure value and then pressurized to supply water. The pressurized water enters the branch pipe 3 from the second branch section 302. The hydraulic bursting machine is adjusted to gradually increase the pressure value. Correspondingly, the pressure in the accommodating chamber inside the fixed seat 1 gradually increases. When the aerosol valve 5 bursts, the pressure value on the hydraulic bursting machine at this time is recorded and compared with the standard burst pressure value to determine whether the burst pressure of the aerosol valve 5 is qualified.

[0027] The pressure resistance and burst test fixture for the aerosol valve in this embodiment can be used to perform pressure resistance and burst tests on the aerosol valve 5 separately, without the need to set up separate fixtures, thereby improving the convenience of the test and reducing the test cost.

[0028] The above embodiments of this utility model are not intended to limit the scope of protection of this utility model. The implementation of this utility model is not limited thereto. All other modifications, substitutions or alterations made to the above structure of this utility model based on the above content of this utility model and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, shall fall within the scope of protection of this utility model.

Claims

1. A pressure burst test fixture for an aerosol valve, characterized in that, Includes a detachable mounting base and a base cover, as well as a connecting pipe for connecting the mounting base; The fixed base has a cavity for accommodating the aerosol valve; the branch pipe has a first branch for connecting a pressure gauge, a second branch for connecting an external booster device, and a branch pipe located between the first and second branches for connecting the fixed base; valves are provided in the first and second branches.

2. The pressure burst test fixture for the aerosol valve according to claim 1, characterized in that, The fixed seat has an annular step at the seat opening. When the aerosol valve is placed into the receiving chamber, the edge of the aerosol valve overlaps the annular step. The seat cover is placed at the seat opening and abuts against the edge of the aerosol valve.

3. The pressure burst test fixture for the aerosol valve according to claim 2, characterized in that, The fixing base has an opening on its bottom wall that connects to the accommodating chamber, and a connecting part for detachably connecting the branch pipe is provided at the opening.

4. The pressure burst test fixture for the aerosol valve according to claim 3, characterized in that, The cover has a clearance hole on its top wall. The clearance hole is used to form a space for the elastic valve cap of the aerosol valve to deform and release the water in the accommodating chamber to complete the pressure relief when the aerosol valve bursts.

5. The pressure burst test fixture for the aerosol valve according to claim 4, characterized in that, The branch pipe includes a straight section and a vertical section perpendicular to the straight section; wherein, the vertical section of the branch pipe is a branch pipe, and the two ends of the straight section are the first branch section and the second branch section, respectively.

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