Timing spraying device suitable for gas, liquid and powder fire extinguishing agent pipeline

Abstract

The invention discloses a timed injection device suitable for gas, liquid and powder fire extinguishing agent pipelines in the field of fire extinguishing agent performance research. The timing injection device comprises a pneumatic ball valve, a three-way electromagnetic valve, an air compressor, a manual ball valve and a three-way connector. A first interface of the three-way electromagnetic valve is communicated with the air compressor through a three-way joint, and a second interface is communicated with the pneumatic ball valve. And the three-way joint is also communicated with a manual ball valve. The pneumatic ball valve is installed in a fire extinguishing agent pipeline, and the air compressor is controlled to drive the pneumatic ball valve to be opened and closed in a timed mode by controlling power-on and power-off of the electromagnetic valve in a timed mode. And meanwhile, the gas pipelines on the two sides of the electromagnetic valve are subjected to pressure relief through the manual ball valve, the situation that the electromagnetic valve is damaged due to the fact that pressure exists in the pipelines for a long time is avoided, and the service life of the electromagnetic valve is prolonged. And the manufacturing cost is far lower than that of a pure high-pressure electromagnetic valve with a timing control function, and the maintenance cost is greatly reduced.

Description

Technical Field

[0001] The present invention relates to a timed injection device in the field of fire extinguishing agent performance research and a fire extinguishing agent performance test device having the timed injection device, and in particular to a timed injection device suitable for gas, liquid, and powder fire extinguishing agent pipelines and a fire extinguishing agent performance test device having the timed injection device. Background Art

[0002] Gaseous, liquid, and solid fire extinguishing agents, such as pentafluoroethane, heptafluoropropane, perfluorohexanone, 2-BTP, and ultrafine dry powder, are typically stored under pressure in tanks. During the extinguishing agent injection process, the pressurized extinguishing agent is rapidly ejected under pressure. One of the key factors influencing the release of extinguishing agent injection is the flow characteristics of the extinguishing agent within the fire extinguishing system piping network. Therefore, research on the flow characteristics of extinguishing agents within the fire extinguishing system piping network is crucial. For this purpose, typical fire laboratories have specialized extinguishing agent performance testing equipment. By timing the release of extinguishing agent and calculating the extinguishing agent flow rate within the pipes over a specific time period, the in-pipe flow and injection performance of the extinguishing agent can be quantitatively studied. Furthermore, effectively controlling the extinguishing agent injection start time allows for quantitative study of the effect of injection duration on the extinguishing agent flow characteristics. It also allows for control of the injection quality at the extinguishing agent nozzle at the end of the pipeline, enabling in-depth research on the flow and diffusion characteristics of the extinguishing agent, providing experimental data reference for the early design of the fire extinguishing system piping network.

[0003] Currently, most fire extinguishing systems utilize timed solenoid valves installed in fire extinguishing lines, which are then opened and closed to achieve timed spraying of the extinguishing agent. However, regardless of whether the extinguishing agent is gaseous, liquid, or powdered, the fluidity of the extinguishing agent will always leave some residual extinguishing agent in the line. This makes solenoid valves less durable for extinguishing agents, especially for powdered extinguishing agents, which can lead to corrosion and a short service life. Furthermore, since the extinguishing agent is sprayed during use, the pressure in the line is relatively high, making ordinary solenoid valves inadequate. High-pressure solenoid valves are therefore required. However, high-pressure solenoid valves are very expensive, with even a relatively good one costing between 4,000 and 5,000 yuan. In contrast, ordinary solenoid valves cost less than 200 yuan, and even a three-way solenoid valve costs around 200 yuan. Therefore, the maintenance cost of the solenoid valve alone in current fire extinguishing agent performance testing equipment is very high. Summary of the Invention

[0004] In order to solve the technical problem of how existing gas, liquid, and powder fire extinguishing agent pipelines can meet the functional requirements of timely output of fire extinguishing agent while reducing maintenance costs, the present invention provides a timed injection device suitable for gas, liquid, and powder fire extinguishing agent pipelines and a fire extinguishing agent performance test device having the timed injection device.

[0005] The present invention is implemented by the following technical solution: a timed injection device suitable for gas, liquid and powder fire extinguishing agent pipelines includes a pneumatic ball valve, a three-way solenoid valve, an air compressor, a manual ball valve and a three-way joint: the first interface of the three-way solenoid valve is connected to the air compressor via the three-way joint, and the second interface is connected to the pneumatic ball valve. When the three-way solenoid valve loses power, the first interface is closed, and the second and third interfaces are opened. When the three-way solenoid valve is energized, the first and second interfaces are opened, and the third interface is closed; the three-way joint is also connected to the manual ball valve; the pneumatic ball valve is installed in the fire extinguishing agent pipeline, and the air compressor drives the pneumatic ball valve to open and close by timing the power on and off of the three-way solenoid valve.

[0006] As a further improvement of the above solution, the timed injection device further includes a relay capable of timed control, and the power on and off of the three-way solenoid valve is controlled by the relay in a timed manner.

[0007] Furthermore, the relay models that can control the length of current output time and can switch between the three gears of seconds, minutes and hours include JSS-11A, JSS-12A, JSS-13, JSS-14, JSS-15, JSS-16, JSS-17, JSS-18 and JSS-19.

[0008] Furthermore, the relay adopts H3Y type time relay, and its timing range is generally 0-60 seconds, 0-5 minutes, 0-30 minutes, and 0-60 minutes. Four gears are optional.

[0009] Furthermore, the timed injection device also includes a DC circuit for supplying power to the relay.

[0010] The present invention also provides a fire extinguishing agent performance test device, which includes a timed injection device installed in a fire extinguishing agent pipeline and suitable for gas, liquid, and powder fire extinguishing agent pipelines. The timed injection device includes a pneumatic ball valve, a three-way solenoid valve, an air compressor, a manual ball valve, and a three-way joint. The first interface of the three-way solenoid valve is connected to the air compressor via the three-way joint, and the second interface is connected to the pneumatic ball valve. When the three-way solenoid valve loses power, the first interface is closed, and the second and third interfaces are opened. When the three-way solenoid valve is energized, the first and second interfaces are opened, and the third interface is closed. The three-way joint is also connected to the manual ball valve. The pneumatic ball valve is installed in the fire extinguishing agent pipeline, and the air compressor drives the pneumatic ball valve to open and close by controlling the power on and off of the three-way solenoid valve.

[0011] As a further improvement of the above solution, the timed injection device further includes a relay capable of timed control, and the power on and off of the three-way solenoid valve is controlled by the relay in a timed manner.

[0012] Furthermore, the relay models that can control the length of current output time and can switch between the three gears of seconds, minutes and hours include JSS-11A, JSS-12A, JSS-13, JSS-14, JSS-15, JSS-16, JSS-17, JSS-18 and JSS-19.

[0013] Furthermore, the relay adopts H3Y type time relay, and its timing range is generally 0-60 seconds, 0-5 minutes, 0-30 minutes, and 0-60 minutes. Four gears are optional.

[0014] Furthermore, the timed injection device also includes a DC circuit for supplying power to the relay.

[0015] Compared with the prior art, the three-way solenoid valve of the present invention is not installed directly in the fire extinguishing agent pipeline, but is installed in the gas pipeline that controls the pneumatic ball valve. Therefore, the three-way solenoid valve will not be corroded by the fire extinguishing agent and has a long service life. At the same time, through the design of the manual ball valve and the three-way joint, when the injection experiment is completed, the air compressor is turned off and the manual ball valve is opened again to release the gas in the pipeline between the air compressor and the three-way solenoid valve, avoiding damage to the three-way solenoid valve due to long-term pressure in the pipeline. According to the design concept of the present invention, the selection of the three-way solenoid valve is not limited by pressure, and there is no need to select a high-pressure solenoid valve. Compared to a simple high-pressure solenoid valve costing 4,000 to 5,000 yuan (and even more if you want to purchase a high-pressure solenoid valve with a timing control function), the timed injection device of the present invention has a total price of approximately 1,775 yuan (1. DC power supply: approximately 200 yuan; 2. Relay: approximately 45 yuan; 3. Pneumatic ball valve: approximately 1,000 yuan; 4. Three-way solenoid valve: approximately 200 yuan; 5. Air compressor: approximately 300 yuan; 6. Manual ball valve: approximately 20 yuan; 7. Three-way connector: approximately 10 yuan, for a total cost of approximately 1,775 yuan). This saves more than half of the short-term cost, and its long lifespan is invaluable in the long-term cost. Therefore, utilizing the timed injection device of the present invention, the fire extinguishing agent performance testing device can solve the technical problem of how existing gas, liquid, and powder fire extinguishing agent pipelines can achieve the required timed output of fire extinguishing agent while reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a timed injection device suitable for gas, liquid, and powder fire extinguishing agent pipelines provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] See also Figure 1 The present invention provides a schematic diagram of a timed injection device suitable for use in gas, liquid, or powder fire extinguishing agent pipelines. This device is primarily used in fire extinguishing agent performance testing devices. Specifically, it is installed in the fire extinguishing agent pipeline of the fire extinguishing agent performance testing device and achieves the timed injection function of the fire extinguishing agent by regularly circulating the corresponding fire extinguishing agent pipeline.

[0019] The timed injection device includes a pneumatic ball valve 3, a three-way solenoid valve 4, an air compressor 5, a manual ball valve 6, a three-way connector 7, and may also include a relay 2 and a DC power supply 1.

[0020] The first channel of the three-way connector 7 connects to the manual ball valve 6, the second channel connects to the pneumatic ball valve 3 via the three-way solenoid valve 4, and the third channel connects to the air compressor 5. The first port of the three-way solenoid valve 4 connects to the air compressor 5 via the three-way connector 7, and the second port connects to the pneumatic ball valve 3. The pneumatic ball valve 3 is installed in the fire extinguishing agent pipeline. By opening or closing, it controls the flow or blockage of fire extinguishing agent in the corresponding fire extinguishing agent pipeline. The air compressor 5 drives the timing of the opening and closing of the pneumatic ball valve 3 by timing the power supply and de-power supply of the three-way solenoid valve 4. By implementing the timing of the three-way solenoid valve 4, the opening time of the three-way solenoid valve 4 is quantitatively controlled, thereby achieving the control of the fire extinguishing agent injection time.

[0021] Compared with the traditional method of directly installing a solenoid valve in the fire extinguishing agent pipeline, the three-way solenoid valve 4 of the present invention is not directly installed in the fire extinguishing agent pipeline, but is installed in the gas pipeline that controls the pneumatic ball valve 3. Therefore, the three-way solenoid valve 4 will not be corroded by the fire extinguishing agent and has a long service life. Through the design of the manual ball valve 6 and the three-way joint 7, when the injection experiment is completed, the air compressor 5 is turned off and the manual ball valve 6 is opened again. The gas in the pipeline between the air compressor 5 and the three-way solenoid valve 4 can be released, avoiding damage to the three-way solenoid valve 4 due to the long-term pressure in the pipeline. At the moment the three-way solenoid valve 4 is closed, the air pressure in the pipeline between the pneumatic ball valve 3 and the three-way solenoid valve 4 will be released normally because the pneumatic ball valve 3 is still in the open state. Therefore, there is no need to worry about the influence of the air pressure in the pipeline between the pneumatic ball valve 3 and the three-way solenoid valve 4 on the three-way solenoid valve 4.

[0022] Therefore, the present invention quantitatively controls the duration of the opening of the pneumatic ball valve 3 by timing the opening and closing of the pneumatic ball valve 3, thereby achieving control over the duration of fire extinguishing agent injection. Furthermore, the three-way solenoid valve 4 used in the fire extinguishing agent field has the advantages of corrosion resistance and a wide pressure range. The pneumatic ball valve 3 can be installed on the fire extinguishing pipeline via a ferrule connection, offering the advantage of convenient installation and being suitable for the injection and release of gaseous, liquid, and powdered fire extinguishing agents, thus having a wide range of applications.

[0023] The three-way solenoid valve 4 can be a one-input, two-output type. There are many ways to control the timing of the three-way solenoid valve 4, including delay circuits, delay controllers, etc. In this embodiment, the relay 2 and the DC power supply 1 are used as examples for illustration. For example, the relay 2 can be a relay capable of timing control, and the power on or off of the three-way solenoid valve 4 can be controlled by the relay 2. The models of the relay 2 that can control the length of the current output time and can switch between the three gears of seconds, minutes, and hours can include JSS-11A, JSS-12A, JSS-13, JSS-14, JSS-15, JSS-16, JSS-17, JSS-18, and JSS-19. The relay 2 can also be an H3Y type time relay, whose timing range is generally 0-60 seconds, 0-5 minutes, 0-30 minutes, and 0-60 minutes. The H3Y type time relay is a common time relay with a user-set timing range and a delayed power-off function. The timer typically has four selectable ranges: 0-60 seconds, 0-5 minutes, 0-30 minutes, and 0-60 minutes. The contact capacity is 5A / 250VAC. DC circuit 1 converts the typical 220V voltage to a voltage acceptable to relay 2, thereby powering relay 2. Of course, in other embodiments, the timed spray device may not include DC circuit 1, but instead utilize a battery-powered voltage output to power relay 2.

[0024] In summary, the DC power supply 1, relay 2, pneumatic ball valve 3, three-way solenoid valve 4, air compressor 5, manual ball valve 6 and three-way connector 7 in this embodiment are connected to form a whole through circuits and air circuits, wherein the DC power supply 1 is connected to a 220V power supply, and the DC power supply 1 switch is turned on to adjust the output voltage to 24V. One end of the wire is connected to the crimping terminal, and the connected crimping terminal is fixed to the current output end through the knob of the DC power supply 1, with the positive and negative poles correspondingly connected. The relay 2 is connected to the DC power supply 1 and the three-way solenoid valve 4 respectively through wires, and the DC power supply 1 transmits the current signal to the relay 2 through the wires. The length of the current output time can be controlled in the relay 2, and the three gears of seconds, minutes and hours can be switched, and the range of each gear is 0-99.99. The current output wire of the relay 2 is connected to the three-way solenoid valve 4 to provide an electrical signal for the start of the solenoid valve. The three-way solenoid valve 4 has two passages and three interfaces, each connected by a 1 / 4-inch NPT male thread on one end and a quick-connect connector with an 8mm diameter pipe on the other end. The quick-connect connector of the normally closed passage is connected to the pneumatic ball valve 3 and the three-way connector 7 via a gas pipeline with an outer diameter of 8mm. When the three-way solenoid valve 4 is de-energized, the gas circuit is closed. When energized, the normally closed passage becomes open, and air flows through the gas pipeline through the three-way solenoid valve 4. The three connectors of the three-way connector 7 are all quick-connect connectors with an outer diameter of 8mm. These three connectors are connected to the three-way solenoid valve 4, the air compressor 5, and the manual ball valve 6 via a gas pipeline with an outer diameter of 8mm. The air inlet of the pneumatic ball valve 3 is connected to a 1 / 4-inch NPT male thread on one end and a quick-connect connector with an 8mm diameter pipe on the other end. It is connected to the three-way solenoid valve 4 via an 8mm outer diameter gas line. Stainless steel straight-through connectors with an NPT male thread and a ferrule on one end are evenly installed at the two connection ends 3-1 and 3-2 of the pneumatic ball valve 3 for connecting to the fire extinguishing pipeline. The manual ball valve 6 has quick-connect connectors with an 8mm diameter pipe on both ends, and one end is connected to the three-way connector 7 via an 8mm outer diameter gas line. The function of the manual ball valve 6 is to vent the pressure in the gas line after the experiment, preventing damage to the three-way solenoid valve 4 caused by prolonged pressure. The air compressor 5 can provide a pressure of 0-1.0 MPa. The outlet of the air compressor 5 is a quick-connect connector with an 8mm diameter pipe, which is connected to the three-way connector 7 at the outlet via an 8mm outer diameter gas line. During the experiment, the air compressor 5 provides the power source for activating the pneumatic ball valve 3.

[0025] The positive and negative terminals of relay 2 are connected to those of DC power supply 1. When DC power supply 1 is turned on, it instantly supplies current to relay 2. The current output terminal of relay 2 is connected to the input terminal of three-way solenoid valve 4, providing starting current for the valve. By setting the current output timing on relay 2, the on / off switching of a specific path in the valve is controlled, thereby achieving a timed flow of air. The airflow output terminal of air compressor 5 is connected to the inlet of the three-way solenoid valve 4 via a gas pipeline and connector. When the three-way solenoid valve 4 is turned on, the gas within the compressor 5 is delivered to the pneumatic ball valve 3 through the gas pipeline, three-way connector 7, and the airflow path within the three-way solenoid valve 4. A gas passage of the three-way solenoid valve 4 is connected to the air inlet of the pneumatic ball valve 3 through a gas pipeline and a three-way joint. The gas generated by the air compressor 5 is transported to the three-way solenoid valve 4 through the gas pipeline. The opening time of the three-way solenoid valve 4 is controlled by the DC power supply 1 and the relay 2 to achieve the purpose of regularly delivering airflow to the pneumatic ball valve 3, thereby controlling the opening time of the pneumatic ball valve 3. The joints on both sides of the pneumatic ball valve 3 are connected to the fire extinguishing agent injection pipeline.

[0026] Therefore, DC power supply 1 is connected to relay 2 to provide power to relay 2. Relay 2 provides starting current to three-way solenoid valve 4, which timedly controls the airflow in a certain path of three-way solenoid valve 4. Air compressor 5 is connected to three-way connector 7 and three-way solenoid valve 4 to provide continuous airflow to three-way solenoid valve 4. One path of three-way solenoid valve 4 is connected to pneumatic ball valve 3 to provide instantaneous airflow to pneumatic ball valve 3 and control the short-term opening of pneumatic ball valve 3. This timed injection device can be installed in pipelines for transporting gaseous, liquid, or solid fire extinguishing agents (such as the fire extinguishing agent pipeline in a fire extinguishing agent performance test device) to control the timed release of fire extinguishing agents, facilitate the calculation of the fire extinguishing agent flow rate in the pipeline during a specific time period, and provide convenience for quantitative research on the flow and injection performance of fire extinguishing agents in the pipeline.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A timed injection device suitable for gas, liquid, and powder fire extinguishing agent pipelines, characterized in that: It comprises a pneumatic ball valve (3), a three-way solenoid valve (4), an air compressor (5), a manual ball valve (6) and a three-way joint (7); a first interface of the three-way solenoid valve (4) is connected to the air compressor (5) via the three-way joint (7), and a second interface is connected to the pneumatic ball valve (3); the three-way joint (7) is also connected to the manual ball valve (6); the pneumatic ball valve (3) is installed in the fire extinguishing agent pipeline, and the air compressor (5) is driven to open and close the pneumatic ball valve (3) by timing the power on and off of the three-way solenoid valve (4).

2. The timed injection device suitable for gas, liquid and powder fire extinguishing agent pipelines according to claim 1, characterized in that: The timed injection device further comprises a relay (2) capable of timed control, and the power on and power off of the three-way solenoid valve (4) is controlled by the relay (2).

3. The timed injection device suitable for gas, liquid and powder fire extinguishing agent pipelines according to claim 2, characterized in that: The relays (2) that can control the duration of current output and switch between the second, minute and hour positions include JSS-11A, JSS-12A, JSS-13, JSS-14, JSS-15, JSS-16, JSS-17, JSS-18 and JSS-19.

4. The timed injection device suitable for gas, liquid and powder fire extinguishing agent pipelines according to claim 2, characterized in that: Relay (2) adopts H3Y type time relay, and its timing range is generally 0-60 seconds, 0-5 minutes, 0-30 minutes, and 0-60 minutes. Four gears are optional.

5. The timed injection device suitable for gas, liquid and powder fire extinguishing agent pipelines according to claim 2, characterized in that: The timed injection device further comprises a DC circuit (1) for supplying power to the relay (2).

6. A fire extinguishing agent performance test device, comprising a timed injection device installed in a fire extinguishing agent pipeline and suitable for gas, liquid, or powder fire extinguishing agent pipelines, characterized in that: The timed injection device comprises a pneumatic ball valve (3), a three-way solenoid valve (4), an air compressor (5), a manual ball valve (6) and a three-way connector (7); a first interface of the three-way solenoid valve (4) is connected to the air compressor (5) via the three-way connector (7), and a second interface is connected to the pneumatic ball valve (3); the three-way connector (7) is also connected to the manual ball valve (6); the pneumatic ball valve (3) is installed in the fire extinguishing agent pipeline, and the air compressor (5) is driven to open and close the pneumatic ball valve (3) by timing the power on and off of the three-way solenoid valve (4).

7. The fire extinguishing agent performance test device according to claim 6, characterized in that: The timed injection device further comprises a relay (2) capable of timed control, and the power on and power off of the three-way solenoid valve (4) is controlled by the relay (2).

8. The fire extinguishing agent performance test device according to claim 7, characterized in that: The relays (2) that can control the duration of current output and switch between the second, minute and hour positions include JSS-11A, JSS-12A, JSS-13, JSS-14, JSS-15, JSS-16, JSS-17, JSS-18 and JSS-19.

9. The fire extinguishing agent performance test device according to claim 7, characterized in that: Relay (2) adopts H3Y type time relay, and its timing range is generally 0-60 seconds, 0-5 minutes, 0-30 minutes, and 0-60 minutes. Four gears are optional.

10. The fire extinguishing agent performance test device according to claim 7, characterized in that: The timed injection device further comprises a DC circuit (1) for supplying power to the relay (2).

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