Fire water system detection apparatus with leak early warning

Abstract

A fire water system detection device with leakage early warning, belonging to the field of flow monitoring technology, is used to solve the problems of inconvenient disassembly of ultrasonic flow meter sensors and difficulty in supporting the converter. The device consists of two sets of matching first arc-shaped brackets and second arc-shaped brackets. Neodymium iron boron permanent magnets are embedded in the inner wall of the brackets for magnetic fixation, and mechanically secured with screws and nuts to ensure a tight fit with the outer wall of the pipe. A placement platform is welded to the outer wall of the second arc-shaped bracket, and the ultrasonic sensor is placed inside the platform. After applying coupling agent to its contact surface, the clamping plate is pressed and fixed by hand-tightening a bolt. A connecting plate is welded between the two first arc-shaped brackets, and an L-shaped fixing bracket is provided on the top. The converter is snapped into the slot, and a connecting cable led out through a notch is inserted into the sensor. This device combines the advantages of magnetic attraction and mechanical fixation, facilitating disassembly and installation, convenient maintenance and replacement, and also providing a supporting structure for the converter.

Description

Technical Field

[0001] This utility model relates to the field of flow monitoring technology, and in particular to a fire water system detection device with leakage early warning. Background Technology

[0002] In the operation of fire-fighting water systems, if pipe leaks are not detected in time, they can easily lead to serious consequences such as water damage, water waste, and even failure of fire-fighting efforts. Flow monitoring is a key means of identifying leaks. Ultrasonic flow meters, due to their non-contact measurement characteristics, can operate without shutting down the water supply or disassembling the pipes, and are widely used in this field. They calculate the flow velocity by measuring the time difference or frequency difference of ultrasonic waves propagating in the fluid with and against the flow, and thus determine the flow rate. In practical applications, ultrasonic sensors need to be installed in pairs to form a fixed sound wave path, while the converter is responsible for signal processing, flow calculation, and result output, and supports wireless communication for remote monitoring.

[0003] In existing technologies, ultrasonic sensors are mostly fixed to the outer wall of pipes by adhesive, which has problems such as difficulty in disassembly, uneven application of adhesive, or uncontrollable curing time. Although some solutions that use hose clamps to fix the sensors have solved the disassembly problem, the lack of a converter support structure has resulted in insufficient overall stability of the equipment, which limits the application scenarios.

[0004] To address the aforementioned issues, this utility model document proposes a fire water system detection device with leakage early warning. Utility Model Content

[0005] This utility model provides a fire water system detection device with leakage early warning, which solves the problems in the prior art where ultrasonic sensors are mostly fixed to the outer wall of pipes by adhesive, resulting in difficulties in disassembly, uneven application of adhesive, or uncontrollable curing time; and the shortcomings of some solutions that use hose clamps to fix the device, which solve the disassembly problem, but lack a converter support structure, resulting in insufficient overall stability of the device and limiting its application scenarios.

[0006] This utility model provides the following technical solution: A fire water system detection device with leak warning capability, comprising: Two sets of matching first arc-shaped card holders and second arc-shaped card holders are used together. The first arc-shaped card holder and the second arc-shaped card holder are magnetically fixed to the outer wall of the pipe. A placement platform is welded and fixed to the outer wall of each of the two second arc-shaped card holders. An ultrasonic sensor with a coupling agent applied to the contact surface with the pipe is placed in the placement platform. A clamping component for reinforcing the ultrasonic sensor is provided on the placement platform. A common connecting plate is welded and fixed between the two first arc-shaped card holders. An L-shaped fixing bracket is welded and fixed to the top of the connecting plate. A converter for processing sensor signals and providing early warning is snapped into the slot at the top of the L-shaped fixing bracket.

[0007] In one possible design, both the inner walls of the first and second arc-shaped card holders are provided with arc-shaped grooves, and neodymium iron boron permanent magnet sheets are embedded and fixed in the arc-shaped grooves. Both ends of the first arc-shaped card holder are fixedly provided with screws, and the ends of the screws pass through the through holes on the opposite second arc-shaped card holders and are threaded with nuts.

[0008] In one possible design, the clamping assembly includes a hand-tightening bolt threaded into a threaded hole on the side wall of the placement platform, the end of which extends into the placement platform and is rotatably mounted via a bearing to a clamping plate for pressing against the outer wall of the ultrasonic sensor.

[0009] In one possible design, two through holes on the placement platform are slidably provided with limiting rods to prevent the clamping piece from rotating, and one end of each of the two limiting rods is fixedly connected to the outer wall of the clamping piece.

[0010] In one possible design, the center of the screw cap on the hand-tightening bolt is provided with an internal hexagonal groove.

[0011] In one possible design, the converter transmits signals to the two ultrasonic sensors via plug-in connecting cables, and the sidewall of the slot has a notch for the corresponding connecting cables to pass through.

[0012] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention.

[0013] The working principle and usage process of this technical solution are as follows: During installation, the two sets of matching first and second arc-shaped brackets are respectively placed in the preset positions on the outer wall of the fire-fighting pipe. A screw is passed through the through hole of the second arc-shaped bracket and tightened with a nut, ensuring a tight fit between the first and second arc-shaped brackets and the outer wall of the pipe. The neodymium iron boron permanent magnets on the inner wall of the arc-shaped brackets are magnetically attracted to the pipe, aiding in fixation and reducing vibration interference. Then, a coupling agent (such as silicone grease or glycerin) is evenly applied to the contact surface of the ultrasonic sensor to ensure efficient penetration of the sound waves through the pipe wall. The two sensors are then... Place the sensor into the corresponding second arc-shaped bracket on the placement platform and adjust its position so that the sensor's transmitting / receiving surface is facing the center line of the pipe. Then, rotate the hand-tightening bolt to push the clamping plate towards the outer wall of the sensor through the thread drive until it is tightened. The limit rod prevents the clamping plate from rotating and ensures that the clamping force is evenly distributed. If tools are needed, the hand-tightening bolt can be further tightened by using an Allen wrench through the Allen groove. Then, insert the bottom of the converter into the slot at the top of the L-shaped fixing bracket and use the notch on the side wall of the slot to pass the connecting cable through and plug it into the sensor interface. When in use, first set the relevant parameters (pipe material, wall thickness, etc.) on the converter's setting panel. The two ultrasonic sensors will transmit the collected signals to the converter. The converter will calculate the time difference between the ultrasonic waves traveling upstream and downstream in real time, combine it with the pipe diameter parameters to obtain the instantaneous flow rate, and accumulate the total flow rate. By comparing with historical flow data (such as the average flow rate per hour), it will identify abnormal fluctuations (such as a sudden drop in flow rate, which may indicate a pipe rupture, or a continuously high flow rate, which may indicate an internal leak in the valve). When the flow rate change exceeds the preset threshold (such as ±15% for 10 minutes), the converter will send an alarm message to the fire control center via a 4-20mA signal or a wireless module (LoRa / NB-IoT). The local display screen will flash a red light and sound a buzzer to prompt on-site personnel to check.

[0014] This utility model has the following beneficial effects: In this invention, the first and second arc-shaped card holders are fixed by magnetic attraction and screw and nut, and the ultrasonic sensor is reinforced by clamping components. Compared with the traditional adhesive fixing method, it is easier to disassemble and install, facilitates the maintenance and replacement of the device, and avoids problems such as uneven glue application or curing time.

[0015] This invention provides a support structure for the converter by welding a connecting plate between two first arc-shaped brackets and welding an L-shaped fixing bracket on the top of the connecting plate. The L-shaped fixing bracket has a slot for engaging the converter, thus solving the problem that the hose clamp fixing method is inconvenient for supporting the converter. Attached Figure Description

[0016] Figure 1 A three-dimensional structural schematic diagram of a fire water system detection device with leakage early warning provided for an embodiment of this utility model; Figure 2 Another perspective structural schematic diagram of a fire water system detection device with leakage early warning provided in an embodiment of this utility model; Figure 3 A schematic diagram showing the separation structure of the ultrasonic sensor, converter, and installation components of a fire water system detection device with leakage early warning provided in an embodiment of this utility model; Figure 4 A schematic diagram of the separation structure of the first arc-shaped bracket and the second arc-shaped bracket of a fire water system detection device with leakage early warning provided in an embodiment of this utility model.

[0017] Reference numerals in the attached drawings: 1. First arc-shaped bracket; 2. Second arc-shaped bracket; 3. Arc-shaped groove; 4. Neodymium iron boron permanent magnet sheet; 5. Screw; 6. Nut; 7. Placement platform; 8. Clamping piece; 9. Hand-tightening bolt; 10. Limiting rod; 11. Hexagonal recess; 12. Connecting plate; 13. L-shaped fixing bracket; 14. Slot; 15. Ultrasonic sensor; 16. Converter; 17. Connecting cable. Detailed Implementation

[0018] 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 protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "opening", "upper", "middle", "length", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted.

[0021] In one embodiment: Please refer to Figure 1-4 A detection device, comprising: Two sets of matching first arc-shaped brackets 1 and second arc-shaped brackets 2 are provided. The inner walls of the first arc-shaped brackets 1 and the second arc-shaped brackets 2 are provided with arc-shaped grooves 3. Neodymium iron boron permanent magnet sheets 4 are embedded and fixed in the arc-shaped grooves 3. Screws 5 are fixedly provided on the inner walls of both ends of the first arc-shaped brackets 1. The ends of the screws 5 can pass through the through holes on the corresponding second arc-shaped brackets 2 and are connected to nuts 6 by threads. During installation, the two sets of matching first arc-shaped brackets 1 and second arc-shaped brackets 2 are first placed on the preset positions on the outer wall of the fire pipe. The screws 5 at both ends of the first arc-shaped brackets 1 are passed through the corresponding through holes of the second arc-shaped brackets 2. Then the nuts 6 are tightened on the screws 5, so that the first arc-shaped brackets 1 and the second arc-shaped brackets 2 are tightly attached to the outer wall of the pipe. At this time, the neodymium iron boron permanent magnet sheets 4 on the inner wall of the arc-shaped brackets are magnetically attracted to the pipe, which helps to fix the brackets and reduce vibration interference. The magnetic attraction and mechanical fastening force work together to resist low-frequency vibration interference below 20Hz.

[0022] Placement platforms 7 are welded and fixed to the outer walls of the two second arc-shaped brackets 2. HL-3 type ultrasonic coupling agent is evenly applied to the contact surface of the ultrasonic sensor 15 (a piezoelectric ceramic probe with a frequency of 1MHz) to ensure that the sound waves can efficiently penetrate the pipe wall. Then, the two ultrasonic sensors 15 with the coupling agent applied are placed into the placement platforms 7 of the corresponding second arc-shaped brackets 2 and their positions are adjusted so that the sensor's transmitting / receiving surface is facing the center line of the pipe.

[0023] The placement platform 7 is equipped with a clamping assembly for securing the ultrasonic sensor 15. The clamping assembly includes a hand-tightening bolt 9 that is threadedly connected to a threaded hole on the side wall of the placement platform 7. The end of the hand-tightening bolt 9 extends into the placement platform 7 and is rotatably mounted with a clamping piece 8 for pressing against the outer wall of the ultrasonic sensor 15 via a bearing. The placement platform 7 has two through holes, and two limiting rods 10 slide through these two through holes. One end of each of the two limiting rods 10 is fixedly connected to the outer wall of the clamping piece 8. Rotating the hand-tightening bolt 9 pushes the clamping piece 8 toward the outer wall of the sensor through threaded transmission until the sensor is secured. The limiting rods 10 prevent the clamping piece 8 from rotating and ensure that the clamping force is evenly distributed.

[0024] A connecting plate 12 is welded and fixed between the two first arc-shaped brackets 1. An L-shaped fixing bracket 13 is welded and fixed to the top of the connecting plate 12. The top of the L-shaped fixing bracket 13 is provided with a slot 14. The bottom of the converter 16 is inserted into the slot 14. The side wall of the slot 14 is provided with a notch for the corresponding connecting cable 17 to pass through. The connecting cable 17 is passed through the notch and plugged into the sensor interface, so that the converter 16 and the two ultrasonic sensors 15 can transmit signals by plugging in the corresponding connecting cable 17.

[0025] During use, relevant parameters are set on the converter 16 setting panel, such as pipe material and wall thickness. The flow alarm threshold is set to ±15% for 10 minutes. The wireless module is configured with NB-IoT communication protocol and a reporting interval of 30 minutes. The ultrasonic sensor 15 emits a pulse signal with a frequency of 1MHz. The converter 16 calculates the downstream propagation time t1 and the upstream propagation time t2 in real time. The flow velocity is calculated according to the formula v=(D / 2sinθ)×[(t1-t2) / (t1×t2)] (θ is the angle between the sound wave and the pipe axis, taken as 45°). The cumulative flow rate Q=v×A×3600 (A is the pipe cross-sectional area). The converter 16 identifies abnormal fluctuations by comparing historical flow data, such as the hourly average flow rate. A sudden drop in flow rate may indicate a pipe rupture, while a continuously high flow rate may indicate internal leakage in the valve. When the flow rate change exceeds the preset threshold, the converter 16 sends an alarm message to the fire control center via the wireless module (NB-IoT). The local display flashes a red light and sounds a buzzer to prompt on-site personnel to check.

[0026] This application can be used for leak detection in fire water systems, and can also be used in other fields applicable to this application.

[0027] In another embodiment: A fire water system detection device with leakage early warning function, which is used in the field of flow monitoring; Please refer to Figure 4The center of the cap on the hand-tightening bolt 9 is provided with an internal hexagonal groove 11. If a tool is needed to tighten the hand-tightening bolt 9, the end of an internal hexagonal wrench can be inserted into the internal hexagonal groove 11 to further tighten the hand-tightening bolt 9.

[0028] However, as is well known to those skilled in the art, the working principles and wiring methods of the ultrasonic sensor 15 and the converter 16 are conventional methods or common knowledge, and will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0029] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0030] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A fire water system detection device with leakage early warning, characterized in that, include: Two sets of matching first arc-shaped card holders (1) and second arc-shaped card holders (2) are used together. The first arc-shaped card holders (1) and the second arc-shaped card holders (2) are magnetically fixed to the outer wall of the pipe. The outer walls of the two second arc-shaped card holders (2) are welded and fixed with a placement platform (7). An ultrasonic sensor (15) with a coupling agent applied to the contact surface with the pipe is placed in the placement platform (7). A clamping component for reinforcing the ultrasonic sensor (15) is provided on the placement platform (7). A connecting plate (12) is welded and fixed between the two first arc-shaped card holders (1). An L-shaped fixing bracket (13) is welded and fixed to the top of the connecting plate (12). A converter (16) for processing sensor signals and providing early warning is snapped into the card slot (14) at the top of the L-shaped fixing bracket (13).

2. The fire water system detection device with leakage early warning according to claim 1, characterized in that, The inner walls of the first arc-shaped card holder (1) and the second arc-shaped card holder (2) are provided with arc-shaped grooves (3), and neodymium iron boron permanent magnet sheets (4) are embedded and fixed in the arc-shaped grooves (3). The inner walls of both ends of the first arc-shaped card holder (1) are fixed with screws (5), and the ends of the screws (5) pass through the through holes on the opposite second arc-shaped card holder (2) and are threaded with nuts (6).

3. The fire water system detection device with leakage early warning according to claim 1, characterized in that, The clamping assembly includes a hand-tightening bolt (9) that is threaded to a threaded hole on the side wall of the placement platform (7). The end of the hand-tightening bolt (9) extends into the placement platform (7) and is rotatably mounted with a clamping piece (8) for pressing against the outer wall of the ultrasonic sensor (15) via a bearing.

4. A fire water system detection device with leakage early warning according to claim 3, characterized in that, The two through holes on the placement platform (7) are slidably provided with limiting rods (10) to prevent the clamping piece (8) from rotating. One end of each of the two limiting rods (10) is fixedly connected to the outer wall of the clamping piece (8).

5. A fire water system detection device with leakage early warning according to claim 3, characterized in that, The center of the cap on the hand-tightening bolt (9) is provided with an internal hexagonal groove (11).

6. A fire water system detection device with leakage early warning according to claim 1, characterized in that, The converter (16) and the two ultrasonic sensors (15) transmit signals by plugging in corresponding connecting cables (17). The side wall of the slot (14) is provided with a notch for the corresponding connecting cable (17) to pass through.

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