Novel mounting structure of fire extinguisher pressure indicating device
By introducing a check valve structure into the fire extinguisher, the problem of gas leakage when replacing or calibrating the pressure indicator device is solved, the effective utilization of resources and the convenience of replacement are achieved, and safety hazards are reduced.
Patent Information
- Application Number
- CN202420910753.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-04-29
AI Technical Summary
When existing fire extinguishers replace or calibrate pressure indicator devices, they need to discharge high-pressure driving gas in the gas cylinder, resulting in waste of resources, complex and time-consuming operations, pose safety risks, and may affect equipment integrity.
A new installation structure for the fire extinguisher pressure indicator device is designed, and by adding a check valve between the fire extinguisher valve and the pressure indicator device, it can automatically close during installation and removal to prevent gas leakage.
It effectively prevents gas leakage, avoids waste of resources, simplifies the replacement process, improves convenience, and reduces safety hazards.
Smart Images
Figure CN222605324U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fire-fighting equipment, in particular to a novel installation structure of a pressure indicating device of a fire extinguisher. Background Art
[0002] In traditional portable fire extinguishers and cart-type fire extinguishers, the pressure indicating device (pressure gauge) installed on the valve is directly connected to the internal pressure of the gas cylinder. However, when the pressure indicating device needs to be replaced due to damage, or when pressure calibration needs to be performed on a dedicated testing device, the high-pressure driving gas filled in the gas cylinder must be discharged first. This process has the following significant problems:
[0003] Serious waste of resources: Every time the pressure indicating device is replaced or calibrated, the high-pressure gas in the cylinder needs to be released, resulting in unnecessary loss of precious fire-fighting medium, which not only increases the cost of fire-fighting agent replenishment, but also imposes an unnecessary burden on the environment; cumbersome and time-consuming operation: The operation of discharging high-pressure gas is itself complicated and time-consuming, requiring professionals to perform it in accordance with specific procedures, which not only prolongs the outage time of the fire extinguisher and affects its normal use, but also increases the labor cost of fire-fighting equipment maintenance; Safety hazards: During the discharge of high-pressure gas, there may be safety risks such as gas leakage and uncontrolled injection, posing a potential threat to operators and the surrounding environment; Damage to equipment integrity: Frequent discharge of high-pressure gas may cause accelerated wear of the internal structure or sealing components of the cylinder, affecting the overall performance and service life of the fire extinguisher.
[0004] In summary, the practice in the prior art of discharging high-pressure gas in the gas cylinder when replacing or calibrating the pressure indicating device not only causes waste of resources, complicated and time-consuming operations, but also brings safety hazards and disadvantages that may affect the integrity of the equipment, and urgently needs to be improved. Utility Model Content
[0005] The utility model aims to provide a novel installation structure of a pressure indicating device of a fire extinguisher. A novel one-way valve is added between the pressure indicating device and the fire extinguisher valve, so that the one-way valve can be automatically closed during the installation and removal of the pressure indicating device to prevent gas leakage.
[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions:
[0007] A new type of installation structure for a fire extinguisher pressure indicating device includes an installation port on a fire extinguisher valve, an installation head of the pressure indicating device, and a one-way valve structure arranged between the fire extinguisher valve and the pressure indicating device, wherein the one-way valve structure includes a valve body installed in the installation port, the installation head is installed on the valve body, a core cavity connecting the installation port and the installation head is provided in the valve body, a valve core is installed in the core cavity, and the ejector pin of the valve core faces the installation head.
[0008] Furthermore: the valve body is threadedly connected to the installation port.
[0009] Furthermore: the valve body and the mounting head are threadedly connected.
[0010] Further: the valve body and the mounting port are connected by positive threads, and the valve body and the mounting head are connected by reverse threads; or the valve body and the mounting port are connected by reverse threads, and the valve body and the mounting head are connected by positive threads.
[0011] Furthermore: the cylindrical surface of the valve body includes a polyhedral cylindrical surface segment.
[0012] Furthermore: the polyhedral cylindrical segment is a hexahedral cylindrical segment.
[0013] Furthermore: the expansion coefficient of the body material is the same as the expansion coefficient of the valve core material. Facing the extreme temperature environment where the fire extinguisher may be used, the stress concentration and looseness caused by temperature changes are reduced, and the safety is increased.
[0014] Furthermore: the material of the valve body is the same as the material of the valve core.
[0015] Compared with the original technology, the utility model has the following beneficial effects:
[0016] 1. The utility model can avoid gas waste. The one-way valve structure can be closed immediately after the pressure indicating device is disassembled, which effectively prevents the leakage of high-pressure gas in the gas cylinder that drives the fire extinguisher, and solves the waste problem caused by the need to release gas when replacing the pressure indicating device in the original technology.
[0017] 2. Improve replacement convenience: For a fire extinguisher equipped with the one-way valve of the utility model, the user can directly disassemble and replace the pressure indicating device without discharging high-pressure gas, which simplifies the operation process and greatly improves the replacement efficiency and convenience. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the structure of the utility model;
[0019] Figure 2 for Figure 1 Schematic diagram of the valve body in the A direction;
[0020] In the figure:
[0021] 1. Mounting port; 2. Mounting head; 3. Valve body; 4. Valve core; 4.1. Ejector pin. DETAILED DESCRIPTION
[0022] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0024] like Figure 1 As shown: A new type of installation structure of a fire extinguisher pressure indicating device, including an installation port 1 on the fire extinguisher valve, an installation head 2 of the pressure indicating device, and a one-way valve structure arranged between the fire extinguisher valve and the pressure indicating device, wherein the one-way valve structure includes a valve body 3 installed in the installation port 1, and the installation head 2 is installed on the valve body 3. The valve body 3 is provided with a core cavity connecting the installation port 1 and the installation head 2, and a valve core 4 is installed in the core cavity, and the ejector pin 4.1 of the valve core 4 faces the installation head 2. The valve body 3 is connected to the installation port 1 by reverse threading, and the valve body 3 is connected to the installation head 2 by normal threading. The outer cylindrical surface of the valve body has a hexahedral cylindrical surface segment. The material of the valve body 3 is the same as that of the valve core 4, so the expansion coefficient of the valve body 3 and the valve core 4 is the same. In the face of the extreme temperature environment where the fire extinguisher may be used, the stress concentration and loose fit caused by temperature changes are reduced, and the safety is increased.
[0025] The working principle of the utility model is as follows:
[0026] Generally, the valve body 3 is pre-installed in the installation port 1 on the fire extinguisher valve, and is installed on the fire extinguisher along with the fire extinguisher valve during the production process of the fire extinguisher valve. The valve body 3 is installed on the installation port 1 of the fire extinguisher valve by threaded connection, so that the entire one-way valve structure can be replaced when the valve core fails in rare cases.
[0027] After the fire extinguisher valve is installed, the pressure indicating device is installed on the valve body 3. When the mounting head 2 of the pressure indicating device is screwed into the valve body 3, the end face of the mounting head 2 will press against the ejector pin 4.1 of the valve core 4. As the pressure indicating device is further screwed in, the ejector pin 4.1 drives the sealing surface of the valve core 4 to gradually open. For details, refer to the working principle of the valve core in the tire valve. When the pressure indicating device is fully screwed into place, the sealing surface of the valve core 4 is basically fully opened, allowing the high-pressure gas in the gas cylinder to pass through, so that the pressure indicating device can display the pressure value normally. When the pressure indicating device needs to be disassembled, it only needs to be rotated in the opposite direction to withdraw it from the valve body 3. At this time, the valve core 4 is automatically closed by the spring or other reset mechanism to prevent gas leakage.
[0028] The valve body 3 is connected to the mounting port 1 by a positive thread, and the valve body 3 is connected to the mounting head 2 by a reverse thread. The purpose of this arrangement is to prevent excessive tightening force from over-pressing the valve core 4 ejector pin 4.1 during the installation of the pressure indicating device, thereby damaging the valve core 4 and even the valve body 3.
[0029] The above implementation is only to illustrate the technical concept and features of the utility model, and its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and it cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. A new type of installation structure for a fire extinguisher pressure indicating device, comprising an installation port on a fire extinguisher valve and an installation head of the pressure indicating device, characterized in that: It also includes a one-way valve structure arranged between the fire extinguisher valve and the pressure indicating device, the one-way valve structure includes a valve body installed in the installation port, the installation head is installed on the valve body, the valve body is provided with a core cavity connecting the installation port and the installation head, a valve core is installed in the core cavity, and the ejector pin of the valve core faces the installation head.
2. The novel installation structure of a fire extinguisher pressure indicating device according to claim 1 is characterized in that: The valve body and the installation port are threadedly connected.
3. The novel installation structure of a fire extinguisher pressure indicating device according to claim 1 is characterized in that: The valve body and the mounting head are threadedly connected.
4. The novel installation structure of a fire extinguisher pressure indicating device according to claim 1 is characterized in that: The valve body and the mounting port are connected by positive threads, and the valve body and the mounting head are connected by reverse threads; or the valve body and the mounting port are connected by reverse threads, and the valve body and the mounting head are connected by positive threads.
5. The novel installation structure of a fire extinguisher pressure indicating device according to claim 4 is characterized in that: The cylindrical surface of the valve body includes a polyhedral cylindrical surface segment.
6. The novel installation structure of a fire extinguisher pressure indicating device according to claim 5 is characterized in that: The polyhedral cylindrical surface segment is a hexahedral cylindrical surface segment.
7. The novel installation structure of a fire extinguisher pressure indicating device according to claim 1 is characterized in that: The expansion coefficient of the valve body material is the same as the expansion coefficient of the valve core material.
8. The novel installation structure of a fire extinguisher pressure indicating device according to claim 7 is characterized in that: The material of the valve body is the same as that of the valve core.