Fire protection product smoke leakage measuring device

Abstract

The application discloses a fire-fighting product smoke leakage amount measuring device, and a gas flow meter pipe group used by the device comprises a plurality of test pipes, a front connecting box, a rear connecting box, a ball valve, a vortex flow meter, a flow regulating valve, a temperature transmitter and a pressure transmitter. 3 The device can be widely applied to the flow measurement of the smoke leakage amount of a fireproof valve of a building ventilation and smoke exhaust system and other flow measurement.

Description

Technical Field

[0001] This application relates to the field of smoke detection technology, and in particular to a smoke leakage measurement device for fire protection products. Background Technology

[0002] my country currently has a large market for fire protection and smoke extraction products. To ensure that these products can effectively control smoke, relevant standards such as "Fire-resistant Valves for Building Ventilation and Smoke Exhaust Systems" (GB 15930), "Smoke Curtains" (XF533), "Fire-resistant Roller Shutters Part 1: General Technical Conditions" (GB14102.1-2024), "Test Methods for Air Tightness, Water Tightness and Wind Pressure Resistance of Building Exterior Doors and Windows" (GB / T 7106-2019), "Fire Resistance Test Methods for Ventilation Ducts" (GB / T 17428-2009), and "Test Methods for Smoke Resistance Performance of Doors and Roller Shutters" (GB / T 41480-2022) all impose strict requirements on smoke leakage and smoke tightness. Valve products are prone to excessive air leakage. Current methods for large-scale smoke leakage testing require frequent pipe replacements, resulting in low measurement efficiency. Furthermore, improper installation of testing devices can increase system leakage, affecting measurement accuracy.

[0003] In the field of gas flow measurement, current flow measurement devices generally suffer from problems such as limited measurement range and discontinuity. To address this, domestic and international research has primarily focused on improving the flowmeter itself, mainly through optimizing flowmeter structure, compensating for nonlinear errors, and developing new types of flowmeters to increase the measurement range. Although the measurement range of existing detection devices has been significantly improved, current measuring devices still cannot meet the gas flow measurement range requirements of fire-fighting smoke exhaust products.

[0004] When used for measuring gas flow in fire protection products, the measuring device needs to achieve a measurement range of 0~1600 m³ / h. Moreover, in order to simulate the requirements of high smoke particle content and high smoke temperature under fire conditions, all existing electronic precision flow meters are damaged in simulated fire conditions, affecting the accuracy of the measurement results.

[0005] Existing valve smoke leakage testing devices typically use a combination of a single measuring pipe and a flow meter for measurement. To achieve a wider flow measurement range (e.g., 1~1600 m³ / h), current methods require multiple measuring pipes with different ranges, leading to frequent pipe disassembly and reassembly during testing.

[0006] 1. Decreased system sealing: Repeated disassembly and installation can easily lead to poor sealing at the connection points, resulting in increased air leakage in the system itself, which affects the accuracy and reliability of the test results.

[0007] 2. Low operational efficiency: The process of replacing pipes is cumbersome, which reduces testing efficiency.

[0008] The information disclosed in the background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Utility Model Content

[0009] This application provides a smoke leakage measurement device for fire protection products to address the above-mentioned technical problems. The device can measure the flow rate of the gas to be measured in the range of 1~1600 m³ / h.

[0010] This application provides a smoke leakage measurement device for fire protection products, including: a connecting pipe assembly, a gas flow meter pipe assembly, a pressure measurement component, and an exhaust fan assembly;

[0011] One end of the connecting pipe assembly is connected to the exhaust port opened on the furnace, and the other end is connected to the gas flow meter pipe assembly.

[0012] The outlet of the gas flow meter tube assembly is connected to the inlet of the induced draft assembly.

[0013] Its characteristic is that the gas flow meter tube assembly includes: multiple test tubes, a front connection box, a rear connection box, a ball valve, a vortex flow meter, a flow regulating valve, a temperature transmitter, and a pressure transmitter.

[0014] The two ends of the test tube are connected to the front connection box and the rear connection box, respectively; ball valves, vortex flow meters, flow regulating valves, temperature transmitters and pressure transmitters are installed on the test tube at intervals; the outer side of the front connection box is connected to the connecting pipe assembly; the outer side of the rear connection box is connected to the exhaust fan assembly.

[0015] Preferably, the pressure measurement component includes: a first pressure sensor, a second pressure sensor, and a display; the pressure measurement component includes: the first pressure sensor and the second pressure sensor are electrically connected to the display respectively; and the temperature transmitter and the pressure transmitter are electrically connected to the display respectively.

[0016] Preferably, a cooling component is installed on the connecting pipeline of the gas flow meter tube assembly and the connecting tube assembly.

[0017] Preferably, the connecting pipe assembly includes: a front connecting pipe, a test valve, and a connecting pipe; the front connecting pipe is connected to the furnace; the front connecting pipe and the test valve are connected; the test valve and the connecting pipe are connected; and the connecting pipe is connected to the gas flow meter pipe assembly.

[0018] Preferably, the induced draft assembly includes: an air inlet pipe, a pressure control valve, a regulating valve, an intake balance regulating valve, and an induced draft fan; one end of the air inlet pipe is connected to a gas flow meter pipe assembly, and the other end is connected to the induced draft fan; a pressure control valve is installed on the air inlet pipe, and a regulating valve is installed on the pressure control valve; the intake balance regulating valve is housed inside the induced draft fan.

[0019] Preferably, the first pressure sensor is disposed on the central axis of the connecting pipe; the second pressure sensor is disposed on the end face of the front connecting pipe.

[0020] Preferably, the gas flow meter assembly includes: a branch pipe, a ball valve, a venturi flow meter, a temperature transmitter, a pressure transmitter, and a flow regulating valve; both ends of the branch pipe are connected to the front connection box and the rear connection box, respectively; the branch pipe is equipped with ball valves, venturi flow meters, temperature transmitters, pressure transmitters, and flow regulating valves at intervals.

[0021] Preferably, the gas flow meter assembly includes: a leakage flow regulating valve, a temperature alarm, and a temperature sensor; the leakage flow regulating valve is vertically mounted on the side wall of the front connection box; the temperature alarm and the temperature sensor are spaced apart on the top of the front connection box.

[0022] Preferably, it includes: an observation window; the observation window is disposed on the side of the connecting pipe facing the gas flow meter tube assembly.

[0023] Preferably, it includes: a movable support; the gas flow meter tube assembly is mounted on the movable support.

[0024] The beneficial effects that this application can produce include:

[0025] 1) The fire protection product smoke leakage measurement device provided in this application, which combines multiple gas flow meters and pipelines, achieves a smoke leakage rate of 0~1600 Nm at 0℃ and 101325 Pa. 3 This device provides continuous measurement within a flow range of / h. It can be widely used for flow measurement of smoke leakage from fire valves in building ventilation and smoke exhaust systems, as well as other flow measurements. In particular, it can effectively reduce the use of pipes and flow meters, reduce the time workers spend replacing pipes during flow measurement, and reduce the damage to system connections caused by pipe replacement. It simplifies the traditional method of smoke leakage flow testing and improves testing efficiency.

[0026] 2) The fire protection product smoke leakage measuring device provided in this application can achieve a measurement range of 0~1600 m³ / h, realizing the measurement of smoke over a wide range. Attached Figure Description

[0027] Figure 1 A schematic diagram of a smoke leakage measurement device for a fire protection product in at least one embodiment provided in this application;

[0028] Figure 2 A first-view perspective three-dimensional structural diagram of a gas flow meter tube assembly in at least one embodiment provided in this application;

[0029] Figure 3 A second-view perspective three-dimensional structural diagram of the gas flow meter tube assembly in at least one embodiment provided in this application;

[0030] Figure 4 A third-view perspective three-dimensional structural diagram of the gas flow meter tube assembly in at least one embodiment provided in this application;

[0031] Figure 5 A schematic diagram of the main structure of the gas flow meter tube assembly in at least one embodiment provided in this application;

[0032] Figure 6 A top view of the gas flow meter tube assembly in at least one embodiment provided in this application;

[0033] Figure 7 A schematic diagram of the module connection structure in at least one embodiment provided in this application;

[0034] Legend:

[0035] Furnace wall 1, first pressure sensor 3, observation window 4, display 8, pressure control valve 9, regulating valve 10, air intake balance regulating valve 11, induced draft fan 12, flange 18, connecting pipe 21, test valve 22, furnace 23, second pressure sensor 24, front connecting pipe 27, front connecting box 31, test tube 33, rear connecting box 34, connecting end pipe 35, air inlet pipe 121, temperature alarm 311, temperature sensor 312, movable bracket 313, ball valve 314, vortex flow meter 315, venturi flow meter 321, air leakage regulating valve 322, cooling assembly 331, temperature transmitter 323, pressure transmitter 324, flexible joint pipe 325, flow regulating valve 332, branch pipe 333. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] Technical means not detailed in this application and not used to solve the technical problems of this application are all set according to common general knowledge in the field, and multiple common general knowledge setting methods can be used to achieve this. All types of sensors, transmitters, and flow meters used in this application are commercially available products.

[0039] See Figures 1-7 The smoke leakage measuring device for fire protection products provided in this application includes: a connecting pipe assembly, a gas flow meter pipe assembly, a pressure measuring component, and an exhaust assembly; the connecting pipe and the gas flow meter pipe are connected; the exhaust assembly and the gas flow meter pipe are connected.

[0040] The connecting pipe assembly includes: a connecting pipe 21, a test valve 22, a first pressure sensor 3, and a front connecting pipe 27. After the flue gas for measurement is generated in the furnace 23, the front connecting pipe 27 is connected to an opening on the side wall of the flue gas pipe in the furnace 23, and enters the gas flow meter assembly connected to the rear end through the front connecting pipe 27. The test valve 22 is connected to the other end of the front connecting pipe 27. The other end of the test valve 22 is connected to the connecting pipe 21. The connecting pipe 21 is connected to the gas flow meter assembly.

[0041] A second pressure sensor 24 is installed on the air inlet end face of the front connecting pipe 27; a first pressure sensor 3 is installed in the central area of ​​the connecting pipe 21.

[0042] The pressure measurement assembly includes: a second pressure sensor 24, a first pressure sensor 3, and a display 8. The second pressure sensor 24 and the first pressure sensor 3 are electrically connected to the display 8. During testing, the operator obtains the pressure changes through the display 8, processes the data, and obtains the required measurement results. The pressure difference between the second pressure sensor 24 and the first pressure sensor 3 can be -300 Pa.

[0043] In one specific embodiment, the test valve 22 is connected to the gas flow meter 5 via a connecting pipe 21. The connecting pipe 21 is made of steel plate with a thickness of not less than 1.5 mm.

[0044] In one specific embodiment, when the test valve 22 is a rectangular valve, in order to adapt to the valve structure, the width and height of the opening of the connecting pipe 21 correspond to the outlet size of the test valve 22, and the length of the connecting pipe 21 is twice the length of the diagonal of the opening of the connecting pipe 21, and the longest can be 2m.

[0045] In one specific embodiment, when the test valve 22 is a circular valve, the diameter of the opening of the connecting pipe 21 corresponds to the outlet size of the test valve 22, and the length of the connecting pipe 21 is twice the opening diameter, with a maximum length of 2m.

[0046] In one specific embodiment, it includes: an observation window 4; the observation window 4 is disposed on the side of the connecting pipe 21 facing the gas flow meter pipe assembly, so as to facilitate the operator to observe the internal condition of the connecting pipe 21.

[0047] The gas flow meter assembly includes: multiple test tubes 33, a front connecting housing 31, a rear connecting housing 34, and connecting end pipes 35. Both ends of each test tube 33 are connected to the front connecting housing 31 and the rear connecting housing 34, respectively. Connecting end pipes 35 are respectively installed on the outer sides of the front connecting housing 31 and the rear connecting housing 34. The front connecting housing 31 is connected to the connecting pipe 21 via the connecting end pipes 35. The rear connecting housing 34 is connected to the induced draft fan 12. A vortex flow meter 315 is installed at the same position on each test tube 33. By using multiple test tubes 33, the gas flow rate between the connecting pipe assembly and the induced draft assembly is increased, enabling effective testing of large-flow-rate gases.

[0048] The exhaust assembly includes: an air inlet pipe 121, an air intake balance regulating valve 11, and an exhaust fan 12; the air inlet pipe 121 and the air intake balance regulating valve 11 are installed inside the exhaust fan 12; the air inlet pipe 121 and the air inlet pipe of the exhaust fan 12 are connected; one end of the air inlet pipe 121 is connected to the connecting end pipe 35 on the rear connecting box 34; a pressure control valve 9 is installed on the air inlet pipe 121; a regulating valve 10 is installed on the pressure control valve 9, and the operator adjusts the regulating valve 10 according to the pressure difference value read and the adjustment needs for measurement.

[0049] In one specific embodiment, the first pressure sensor 3 is disposed on the center line of the side of the connecting pipe 21, and the distance between it and the test valve 22 is 0.75 times the total length of the connecting pipe 21. The accuracy of the measuring instruments used in the above parts meets the following accuracy requirements: temperature: ±2.5℃; pressure: not lower than 0.5 grade; flow rate: ±2.5%.

[0050] In one specific embodiment, the gas flow meter tube assembly includes four test tubes 33; the test tubes 33 are arrayed between the front connecting housing 31 and the rear connecting housing 34. By setting four test tubes 33, the gas flow rate measurement range of 1~1600 m³ / h can be achieved.

[0051] In one specific embodiment, the gas flow meter tube assembly includes: 3 test tubes 33; the 3 test tubes 33 are arranged laterally at intervals between the front connecting box 31 and the rear connecting box 34.

[0052] In one specific embodiment, the gas flow meter assembly includes a temperature alarm 311 and a temperature sensor 312. The temperature alarm 311 and the temperature sensor 312 are spaced apart in the front connection box 31. The temperature sensor 312 is electrically connected to the display 8 to measure and display the temperature changes inside the front connection box 31 in real time. If the temperature inside the front connection box 31 exceeds the limit, an alarm will be issued in time, and the operator will perform gas shut-off and cooling operations to protect the components used in the test.

[0053] In one specific embodiment, the device includes: a movable support 313; a gas flow meter tube assembly placed on the movable support 313; and rollers provided at the bottom of the movable support 313 to facilitate moving the gas flow meter tube assembly as needed and to provide reliable support for longer and heavier gas flow meter tube assemblies.

[0054] In one specific embodiment, the gas flow meter assembly includes: a leakage regulating valve 322; the leakage regulating valve 322 is disposed on the side wall of the front connecting box 31, so that the operator can adjust the leakage of the detection system as needed during detection to increase the flow rate.

[0055] In one specific embodiment, the gas flow meter assembly includes: a cooling component 331; the cooling component 331 is installed on the pipeline connecting the front connecting housing 31 and the connecting pipe 21, and the cooling component 331 reduces the temperature of the measured flue gas as needed.

[0056] In one specific embodiment, ball valves 314, vortex flow meters 315, temperature transmitters 323, pressure transmitters 324, and flow regulating valves 332 are spaced apart on each test tube 33; temperature transmitters 323 and pressure transmitters 324 are electrically connected to a display 8. Each valve adjusts the gas velocity and flow rate in the pipeline according to the test conditions; the operator monitors the temperature of the test flue gas and the pressure inside the pipe based on the pressure and temperature values ​​obtained from the temperature transmitters 323 and 324, so as to make timely adjustments.

[0057] In one specific embodiment, the flow regulating valve 332 and the test tube 33 are connected by a flexible joint tube 325 to increase the elasticity of the rigid test tube 33. When there are three test tubes 33, the middle test tube 33 is not connected by the flexible joint tube 325, while the two test tubes 33 on both sides are connected by the flexible joint tube 325.

[0058] In one specific embodiment, in order to improve the applicable flue gas flow range of the device and meet the detection needs of small flow test devices, a branch pipe 333 is provided; one end of the branch pipe 333 is connected to the front connecting box 31, and the other end is connected to the rear connecting box 34; ball valves 314, venturi flow meters 321, temperature transmitters 323, pressure transmitters 324, and flow regulating valves 332 are arranged at intervals on the branch pipe 333 in order to realize the detection of small flow test devices.

[0059] An apparatus in which three test tubes 33 are arranged at horizontal intervals, the test tubes 33 being arranged as follows: Figure 6 The tubes in the middle are labeled A, B, and C from top to bottom. The testing process is as follows:

[0060] System air leakage test: Open all ball valves 314 on test pipe 33 and flow regulating valve 332 on pipe A, and start testing the air leakage using a DN32 pipeline vortex flow meter 315. The system air leakage should meet the requirement of (15~25 m³ / s). 3 After / h), the smoke leakage test of the specimen begins. If it does not meet the requirements, the leakage volume regulating valve 322 is used to adjust it to meet the system leakage volume requirements. After meeting the requirements, the ball valve 314 on test pipes A and C 33 is closed, and the smoke leakage measurement of the specimen is started using the DN32 pipeline vortex flow meter 315. If the measured value of the total smoke leakage of the specimen is greater than 80m³, the test is considered successful. 3 If the flow rate is / h, the ball valve 314 and flow regulating valve 332 on test tube A 33 or the ball valve 314 and flow regulating valve 332 on test tube C 33 can be opened. The measured flow rate result is the sum of the results of the vortex flow meters 315 on test tubes A and B 33, or the measured flow rate result is the sum of the results of the vortex flow meters 315 on test tubes A and C 33.

[0061] When the total smoke leakage of the test specimen reaches 825 m 3 If the air leakage rate is / h, then close the ball valve 314 and flow regulating valve 332 on test tube B 33, and simultaneously open the ball valve 314 and flow regulating valve 332 on test tubes A and C 33. The measured total air leakage is the sum of the results from the vortex flow meters 315 on test tubes B and C 33. This represents the situation where the system air leakage gradually increases. If the system air leakage decreases, then the operation is reversed.

[0062] Branch pipe 333 is only used for measuring flow rates greater than 2.5m. 3 / h or flow rate less than 25 m 3 Flue gas flow rate per hour.

[0063] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A smoke leakage measuring device for fire protection products, comprising: Connecting pipe assembly, gas flow meter pipe assembly, pressure measurement assembly, and exhaust assembly; One end of the connecting pipe assembly is connected to the exhaust port opened on the furnace (23), and the other end is connected to the gas flow meter pipe assembly pipeline; The outlet of the gas flow meter tube assembly is connected to the inlet of the induced draft assembly. The gas flow meter assembly is characterized by comprising: multiple test tubes (33), a front connection box (31), a rear connection box (34), a ball valve (314), a vortex flow meter (315), a flow regulating valve (332), a temperature transmitter (323), and a pressure transmitter (324). The two ends of the test tube (33) are connected to the front connecting box (31) and the rear connecting box (34) respectively; ball valve (314), vortex flow meter (315), flow regulating valve (332), temperature transmitter (323) and pressure transmitter (324) are installed on the test tube (33) at intervals; the outer side of the front connecting box (31) is connected to the connecting pipe group; the outer side of the rear connecting box (34) is connected to the air induced draft assembly.

2. The smoke leakage measuring device for fire protection products according to claim 1, characterized in that, The pressure measurement component includes: a first pressure sensor (3), a second pressure sensor (24), and a display (8); the pressure measurement component includes: the first pressure sensor (3) and the second pressure sensor (24) are electrically connected to the display (8) respectively; the temperature transmitter (323) and the pressure transmitter (324) are electrically connected to the display (8) respectively.

3. The smoke leakage measuring device for fire protection products according to claim 1, characterized in that, A cooling assembly (331) is installed on the connecting pipeline of the gas flow meter tube group and the connecting tube group.

4. The smoke leakage measuring device for fire protection products according to claim 2, characterized in that, The connecting pipe assembly includes: a front connecting pipe (27), a test valve (22), and a connecting pipe (21); the front connecting pipe (27) is connected to the furnace (23); the front connecting pipe (27) and the test valve (22) are connected; the test valve (22) and the connecting pipe (21) are connected; the connecting pipe (21) is connected to the gas flow meter assembly.

5. The smoke leakage measuring device for fire protection products according to claim 1, characterized in that, The exhaust assembly includes: an air inlet pipe (121), a pressure control valve (9), a regulating valve (10), an intake balance regulating valve (11), and an exhaust fan (12); one end of the air inlet pipe (121) is connected to the gas flow meter pipe assembly, and the other end is connected to the exhaust fan (12); a pressure control valve (9) is installed on the air inlet pipe (121), and a regulating valve (10) is installed on the pressure control valve (9); the intake balance regulating valve (11) is housed inside the exhaust fan (12).

6. The smoke leakage measuring device for fire protection products according to claim 4, characterized in that, The first pressure sensor (3) is located on the central axis of the connecting pipe (21); the second pressure sensor (24) is located on the end face of the front connecting pipe (27).

7. The smoke leakage measuring device for fire protection products according to claim 1, characterized in that, The gas flow meter assembly includes: a branch pipe (333), a ball valve (314), a venturi flow meter (321), a temperature transmitter (323), a pressure transmitter (324), and a flow regulating valve (332); the two ends of the branch pipe (333) are connected to the front connecting box (31) and the rear connecting box (34) respectively; the ball valve (314), the venturi flow meter (321), the temperature transmitter (323), the pressure transmitter (324), and the flow regulating valve (332) are installed at intervals on the branch pipe (333).

8. The smoke leakage measuring device for fire protection products according to claim 4, characterized in that, The gas flow meter assembly includes: a leakage flow regulating valve (322), a temperature alarm (311), and a temperature sensor (312); the leakage flow regulating valve (322) is vertically installed on the side wall of the front connection box (31); the temperature alarm (311) and the temperature sensor (312) are spaced apart on the top of the front connection box (31).

9. The smoke leakage measuring device for fire protection products according to claim 4, characterized in that, include: Observation window (4); Observation window (4) is located on the side of the connecting pipe (21) facing the gas flow meter tube assembly.

10. The smoke leakage measuring device for fire protection products according to claim 1, characterized in that, include: Movable support (313); The gas flow meter tube assembly is installed on the movable bracket (313).

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