A water testing device for a fire fighting tip

Abstract

This invention discloses a water testing device for fire-fighting terminals, relating to relevant standardization technical fields. It includes a pipe body with a straight pipe installed inside. An absolute pressure sensor is installed in the middle of the curved surface of the pipe body. A differential pressure sensor and a temperature sensor are respectively installed on both sides of the curved surface of the pipe body on the straight pipe. A converging pipe and a diverging pipe are connected to both ends of the straight pipe. A base is installed on one side of the pipe body, and a valve shell and a flaring port are respectively installed at both ends of the base. This invention can effectively suppress vortices and velocity distribution distortion in upstream water flow, effectively utilize pressure gradient changes to smooth water flow disturbances, reduce the constraints of the upstream straight pipe section on testing, achieve more efficient and flexible detection, expand the device's adaptability range, and convert water flow pressure into driving force, effectively realizing dynamic detection under different flow conditions, improving the effective coverage of testing work, and meeting the testing needs under different operating conditions.

Description

Technical Field

[0001] This invention relates to the field of related standardization technology, specifically to a water testing device for fire-fighting terminals. Background Technology

[0002] Fire-fighting terminal water testing is a key measure to verify the working status of automatic sprinkler system terminals. By simulating sprinkler head operation, the system's linkage function and water supply parameters are tested to achieve standardized testing of the water supply pressure and flow of the fire-fighting system. In order to meet the precise management needs of fire protection acceptance and regular maintenance, it is necessary to use relevant standardized testing devices to achieve synchronous, accurate, and digital measurement of key parameters, and ensure the standardization of the testing process and the authority of the results. However, current testing equipment is limited by the upstream pipe section when conducting standardized tests on fire protection terminals. During the test, the accuracy of the test is easily affected by water flow disturbances such as upstream vortices and velocity distribution distortions. In addition, the test mode is single and cannot meet the dynamic test requirements under different flow conditions. It also lacks effective flow stabilization measures, which not only affects the test accuracy, but also easily causes water splashing during the discharge process. Summary of the Invention

[0003] This invention provides a water testing device for fire-fighting terminals, which can effectively solve the problems mentioned in the background art. When conducting relevant standardized tests on fire-fighting terminals, the current testing devices are limited by the upstream pipe section. During the test, the water flow disturbance caused by upstream vortices and velocity distribution distortion can affect the test accuracy. In addition, the test mode is single and cannot meet the dynamic test requirements under different flow conditions. Furthermore, there is a lack of effective flow stabilization measures, which not only affects the test accuracy but also easily causes water splashing during the discharge process.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a water testing device for fire-fighting terminals, comprising a pipe body, wherein an integrated testing mechanism is installed inside the pipe body; The integrated testing mechanism includes a straight tube; A straight pipe is installed inside the tube body. An absolute pressure sensor is installed in the middle of the outer curved surface of the tube body. A differential pressure sensor and a temperature sensor are installed on both sides of the outer curved surface of the tube body on the straight pipe. A converging tube and a diverging tube are connected to both ends of the straight pipe. A base is installed on one side of the tube body. A valve body and a flaring head are installed at both ends of the base. A tube core is embedded at one end of the flaring head. A solenoid valve is installed at the end of the tube core. A shaft is rotatably mounted embedded in the top of the outer curved surface of the valve housing. A valve plate and a rotating wheel are respectively connected to the two ends of the shaft. A convex box is installed on the outer curved surface of the valve housing corresponding to the position of the rotating wheel. A guide tube is symmetrically mounted on the outer curved surface of the convex box. A drive rod is rotatably mounted embedded in the top of the base. A plug plate is threaded onto the outside of the drive rod. An impeller is rotatably mounted on the other end of the flared opening. A rotating shaft is installed at the end of the impeller. Both the rotating shaft and the end of the drive rod are equipped with bevel gears.

[0005] Preferably, a sliding cavity is provided inside the base corresponding to the position of the plug plate, a number of side grooves are provided at equal angles along the circumferential direction on the outer wall of the tube core, a number of ring plates are evenly installed at equal intervals on the inner wall of the flared head at the position outside the tube core, a number of guide holes are evenly opened at equal intervals on the end face of the ring plates, and a guide head is installed at the end of the solenoid valve. A box is installed at the bottom of the base, and sliding plates are symmetrically installed inside the box. Insertion tubes are symmetrically installed on the top edge of the box, and air is filled inside the box at the position between the two sliding plates.

[0006] Preferably, the inner diameters of the converging tube and the expanding tube gradually expand away from the straight tube, and the converging tube, the expanding tube, and the straight tube together form a Venturi effect tube structure. The absolute pressure sensor detection end is connected to the straight tube, the differential pressure sensor detection end is connected to the middle of the straight tube and the port of the converging tube, and the temperature sensor detection end is connected to the port of the expanding tube.

[0007] Preferably, the base is connected to the pipe body via a valve housing, the ends of the converging and expanding tubes are fixedly connected to the pipe body, the valve housing fits into the valve plate, the space inside the sliding cavity located on both sides of the plug plate is connected to the ends of the guide tubes on both sides of the convex box, the sliding cavity and the convex box are both filled with hydraulic fluid, and an indicator head is installed at the end of the shaft.

[0008] Preferably, the drive rod is a reciprocating lead screw, the drive rod and the rotating shaft are connected by a bevel gear transmission, and an inertia ring is connected to the outer curved surface of the rotating shaft.

[0009] Preferably, the inner diameter of the expanding head gradually expands from the impeller side to the core side, and both the core and the ring plate are conical, with the conical surface of the core and the opening direction of the side groove perpendicular to the opening direction of the guide hole.

[0010] Preferably, a floating connection mechanism is installed at the other end of the tube; The floating connection mechanism includes a connector; A connector is installed at the other end of the pipe. An installation ring is installed inside the connector. A rubber ring is installed at one end of the installation ring. Several locking plates are installed at equal angles along the circumferential direction on the inner wall of the rubber ring. Several rubber rings are installed at equal intervals at the ends of the locking plates. An air cushion is sleeved on the outside of the installation ring. A locking head is installed at the end of the connector by thread. A ring gasket is embedded in the inner wall of the installation ring. A through pipe is connected to one side of the inner curved surface of the air cushion. A locking pad is installed at one end of the ring pad, and a guide ring is installed at the end of the locking pad. Several through holes are opened at equal angles along the circumferential direction on the inner wall of the guide ring. Ear plates are symmetrically installed on the outer wall of the connector. An outer arm is hinged to the end of the ear plate. A slide rod is slidably installed at one end of the outer arm. A clip is installed at one end of the slide rod. A permanent magnet is installed inside the clip. A sliding plate is installed at the other end of the slide rod. A connecting pipe is connected to one side of the outer arm end face. A side tube is embedded in the outer wall of the connector at the position corresponding to the other end of the outer arm. A slide tube is slidably installed at one end of the side tube. A universal head is installed at one end of the slide tube. A slip ring is installed at the other end of the slide tube inside the side tube. An inner opening is opened at the other end of the side tube. Compression springs are sleeved on the outer sides of both the slide tube and the slide rod.

[0011] Preferably, the inner wall of the locking head is conical, and the inner radial direction of the locking head gradually narrows towards the rubber ring. The inner cavity of the air cushion is connected to the inner cavity of the ring pad through a through tube. The air cushion, the ring pad, and the locking guard are all elastic air bladders, and the air cushion and the ring pad are filled with air. The locking guard plate is inclined, and each locking guard plate alternates from end to end in sequence. The two ends of the locking guard plate are connected to the rubber ring and the rubber ring, respectively.

[0012] Preferably, the locking pad is trumpet-shaped, and the inner radial direction of the locking pad gradually narrows away from the ring pad. The inner cavity of the locking pad is connected to the through-hole, and the connector and the base are both connected to the box body through the insertion tube.

[0013] Preferably, the slide tube is connected to the outer arm via a universal joint, the space inside the outer arm located outside the slide rod is connected to the slide tube via a connecting pipe, and the inner opening is connected to the through port via a guide ring.

[0014] Compared with the prior art, the advantages of the present invention are: the present invention has a scientific and reasonable structure and is safe and convenient to use; 1. Equipped with an integrated detection mechanism, the device utilizes a combination of straight pipes, converging pipes, and expanding pipes to construct an internal flow path. This guides the water flow during testing, naturally smoothing and accelerating the fluid, effectively suppressing upstream vortices and velocity distribution distortion. It also effectively utilizes the pressure gradient generated by the contraction and expansion structures to smooth out flow disturbances, significantly reducing the requirements for the length of the upstream straight pipe section. This reduces the constraints imposed by the upstream straight pipe section on the testing process, enabling more efficient and flexible detection while expanding the device's adaptability. During water testing, the absolute pressure sensor, differential pressure sensor, and temperature sensor can more stably detect water flow pressure and temperature parameters. The device provides more accurate feedback to the external processor of the absolute static pressure at the straight pipe, the differential pressure at the inlet of the straight pipe and the converging pipe, and the real-time water flow temperature parameters. Differential pressure allows for more precise flow measurement and real-time temperature and pressure compensation for density. Furthermore, the constant discharge coefficient of the Venturi tube structure formed by the converging pipe, straight pipe, and expanding pipe significantly reduces testing difficulty and improves testing accuracy. By combining the base, valve body, and flared opening, a flow-limiting guide structure can be formed. On one hand, it can be equipped with the transmission conversion function of shaft, impeller, convex box, guide tube, plug plate, drive rod, impeller, rotating shaft, bevel gear, and sliding cavity to convert and utilize water flow pressure, providing a stable steering driving force for the valve plate, and realizing equivalent control of valve opening. It can realize dynamic pressure testing under different opening and flow states during the test, which can effectively improve the coverage of the test work, meet the testing needs of fire protection structures under different working conditions, realize more comprehensive water flow pressure testing, and make the on-site work more authoritative and representative. On the other hand, it can be combined with the tube core, side groove, ring plate, and guide hole. With the force relief effect of the impeller, multiple dissipation of water flow energy can be achieved, making the water flow out of the guide head very uniform and stable, avoiding water splashing, and reducing noise. In addition, the energy storage and buffering effect of the box, slide plate, and insertion pipe can further stabilize the water flow and improve the reliability of the test.

[0015] 2. Equipped with a floating connection mechanism, the connector, mounting ring, locking plate, rubber ring, and rubber ring work together to form a rigid clamping structure. Combined with the limiting and pressing effect of the locking head, it provides initial rigid restraint of the pipe section under test, effectively improving connection reliability and strength. It also effectively combines elastic displacement to achieve adaptive clearance and fit. With the elastic expansion and contraction of the air cushion and the flow guiding effect of the through pipe, plus the flexible clamping effect of the ring gasket, it provides double restraint of the pipe section under test during pipeline connection. While improving connection reliability, it can accommodate microscopic unevenness at the end of the pipe section under test, elastically compensating for common port corrosion, scratches, and slight deformation. In this process, it can also compensate for coaxiality deviations during pipeline connection. Even if the pipeline is slightly misaligned, it can guide the connector to clamp onto the end of the pipe section under test, achieving synchronous alignment. By combining locking pads, guide rings, and ports, a dynamic sealing structure can be formed. On the one hand, it can be used for double limiting during pipe connection to achieve triple sealing. On the other hand, it can convert and utilize water pressure, transforming water flow pressure into sealing pressure for sealing compensation, effectively improving the compatibility and adaptability of sealing connection work with water flow pressure, and achieving more efficient and stable sealing limiting. By combining ear plates, outer arms, slide rods, clamps, sliding plates, connecting pipes, side cylinders, slide pipes, universal joints, slip rings, inner ports, compression springs, and permanent magnets, an external clamping structure can be formed, which can achieve axial limiting of the connector during testing and can further convert and utilize water flow pressure, effectively reducing the axial impact of water flow on the connector during testing. Combined with double limiting and triple sealing during pipe connection, it achieves double dynamic compensation limiting of the connector, which not only makes the connector suitable for testing different pipe diameter specifications, but also makes it fit the pipe better, greatly improving the convenience and stability of sealing connection.

[0016] In summary, during the fire-fighting terminal water test, this device can effectively suppress upstream water flow vortices and velocity distribution distortion, and effectively utilize pressure gradient changes to smooth water flow disturbances, reducing the constraints of upstream straight pipe sections on the testing work, achieving more efficient and flexible testing, expanding the device's adaptability, and transforming water flow pressure into driving force to achieve dynamic testing under different flow conditions, thus improving the effective coverage of the testing work and meeting the testing needs under different working conditions. Simultaneously, it dissipates the outflow pressure of the water flow, making the outflow more stable, and can achieve double limiting and triple sealing at the connection point. It can meet the pipe connection requirements of different diameters without replacing the joints, and can use water flow pressure to achieve dynamic compensation of sealing connection pressure, improving fit and connection stability. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0018] In the attached diagram: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the straight pipe installation structure of the present invention; Figure 3 This is a schematic diagram of the integrated detection mechanism structure of the present invention; Figure 4 This is a partial exploded view of the present invention; Figure 5 This is a schematic diagram of the rotating wheel mounting structure of the present invention; Figure 6 This is a schematic diagram of the floating connection mechanism of the present invention; Figure 7 This is a schematic diagram of the locking pad installation structure of the present invention; Figure 8 This is a partial exploded view of the floating connection mechanism of the present invention; The following are the labels in the diagram: 1. Pipe body; 11. Solenoid valve; 12. Absolute pressure sensor; 13. Differential pressure sensor; 14. Temperature sensor; 20. Integrated testing mechanism; 201. Straight tube; 202. Retracting tube; 203. Expanding tube; 204. Base; 205. Valve body; 206. Expanding head; 207. Core tube; 208. Shaft; 209. Valve plate; 210. Rotary wheel; 211. Convex box; 212. Guide tube; 213. Plug plate; 214. Drive rod; 215. Impeller; 216. Rotating shaft; 217. Bevel gear; 218. Slide cavity; 219. Side groove; 220. Ring plate; 221. Guide hole; 222. Guide head; 223. Box body; 224. Slide plate; 225. Insert tube; 21. Indicator head; 22. Inertia loop; 30. Floating connection mechanism; 301. Connector; 302. Mounting ring; 303. Locking guard plate; 304. Rubber ring; 305. Rubber ring; 306. Air cushion; 307. Locking head; 308. Ring washer; 309. Through pipe; 310. Locking guard; 311. Guide ring; 312. Through port; 313. Ear plate; 314. Outer arm; 315. Slide rod; 316. Clamp; 317. Carrying plate; 318. Connecting pipe; 319. Side cylinder; 320. Slide tube; 321. Universal head; 322. Slip ring; 323. Inner port; 324. Compression spring; 325. Permanent magnet. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] Example: Figure 1-8 As shown, the present invention provides a technical solution, a water testing device for fire-fighting terminals, including a pipe body 1, and an integrated testing mechanism 20 installed inside the pipe body 1; The integrated testing facility 20 includes a straight pipe 201; A straight pipe 201 is installed inside the pipe body 1. An absolute pressure sensor 12 is installed in the middle of the outer curved surface of the pipe body 1. A differential pressure sensor 13 and a temperature sensor 14 are respectively installed on both sides of the outer curved surface of the pipe body 1 located on the straight pipe 201. A converging tube 202 and a diverging tube 203 are respectively connected to both ends of the straight pipe 201. The inner diameters of the converging tube 202 and the diverging tube 203 gradually expand away from the straight pipe 201, and the converging tube 202, the diverging tube 203 and the straight pipe 201 together form a Venturi effect pipe structure. The structure includes an absolute pressure sensor 12 whose detection end is connected to a straight pipe 201, a differential pressure sensor 13 whose detection end is connected to the middle of the straight pipe 201 and the port of the converging pipe 202, and a temperature sensor 14 whose detection end is connected to the port of the expanding pipe 203 for real-time detection. A base 204 is installed on one side of the pipe body 1, and a valve shell 205 and an expansion joint 206 are respectively installed at both ends of the base 204. A tube core 207 is embedded at one end of the expansion joint 206, and a solenoid valve 11 is installed at the end of the tube core 207. A shaft 208 is rotatably mounted embedded in the top of the outer curved surface of the valve housing 205. A valve plate 209 and a rotating wheel 210 are respectively connected to the two ends of the shaft 208. A convex box 211 is installed on the outer curved surface of the valve housing 205 corresponding to the position of the rotating wheel 210. A guide tube 212 is symmetrically mounted on the outer curved surface of the convex box 211. A drive rod 214 is rotatably mounted embedded in the top of the base 204. A plug plate 213 is threadedly mounted on the outside of the drive rod 214. An impeller 215 is rotatably mounted on the other end of the flared opening 206. A rotating shaft 216 is mounted on the end of the impeller 215. Both the rotating shaft 216 and the drive rod 214 are equipped with bevel gears 217. The drive rod 214 is a reciprocating lead screw. The drive rod 214 and the rotating shaft 216 are connected by bevel gears 217. An inertia ring 22 is connected to the outer curved surface of the rotating shaft 216 to improve the stability and continuity of the driving force conversion.

[0021] A sliding cavity 218 is provided inside the base 204 at the position corresponding to the stopper plate 213. The base 204 is connected to the pipe body 1 through the valve shell 205. The ends of the tapered tube 202 and the expanding tube 203 are fixedly connected to the pipe body 1. The valve shell 205 fits with the valve plate 209. The space inside the sliding cavity 218 located on both sides of the stopper plate 213 is connected to the ends of the guide tubes 212 on both sides of the convex box 211. Both the sliding cavity 218 and the convex box 211 are filled with hydraulic fluid. An indicator head 21 is installed at the end of the shaft 208 for dynamic detection. Several side grooves 219 are provided at equal angles along the circumferential direction on the outer wall of the tube core 207. Several ring plates 220 are evenly installed at equal intervals on the inner wall of the expansion head 206 located outside the tube core 207. The inner diameter of the expansion head 206 gradually expands from the impeller 215 side to the tube core 207 side. Both the tube core 207 and the ring plates 220 are conical. The conical curved surface of the tube core 207 and the opening direction of the side groove 219 are perpendicular to the opening direction of the guide hole 221, so as to dissipate the water flow energy and improve the stability of the discharged water flow. Several guide holes 221 are evenly opened at equal intervals on the end face of the ring plates 220. A guide head 222 is installed at the end of the solenoid valve 11. A housing 223 is installed at the bottom of the base 204. Slide plates 224 are symmetrically slidably installed inside the housing 223. Insertion tubes 225 are symmetrically installed on the top edge of the housing 223. Air is filled inside the housing 223 at the position between the two slide plates 224.

[0022] A floating connection mechanism 30 is installed at the other end of the pipe body 1; The floating connection mechanism 30 includes a connector 301; A connector 301 is installed at the other end of the pipe body 1. An installation ring 302 is installed inside the connector 301. A rubber ring 305 is installed at one end of the installation ring 302. Several locking plates 303 are installed at equal angles along the circumference of the inner wall of the rubber ring 305. Several rubber rings 304 are installed at equal and even intervals at the ends of the locking plates 303. An air cushion 306 is sleeved on the outside of the installation ring 302. A locking head 307 is installed at the end of the connector 301 by thread. A ring gasket 308 is embedded in the inner wall of the installation ring 302. A through pipe 309 is connected to one side of the inner curved surface of the air cushion 306. A locking pad 310 is installed at one end of the ring pad 308. The inner wall of the locking head 307 is conical, and the inner radial direction of the locking head 307 gradually contracts towards the rubber ring 305. The inner cavity of the air cushion 306 is connected to the inner cavity of the ring pad 308 through the through tube 309. The air cushion 306, the ring pad 308 and the locking pad 310 are all elastic airbags, and the air cushion 306 and the ring pad 308 are filled with air. The locking plate 303 is inclined, and each locking plate 303 alternates from end to end. The two ends of the locking plate 303 are connected to the rubber ring 304 and the rubber ring 305 respectively. The inner wall of the guide ring 311 has several openings 312 at equal angles along the circumference. The locking pad 310 is trumpet-shaped, and the inner radial direction of the locking pad 310 gradually narrows away from the ring pad 308. The inner cavity of the locking pad 310 is connected to the openings 312. The connector 301 and the base 204 are both connected to the housing 223 through the insertion tube 225 to improve the sealing fit and perform dynamic compensation. The outer wall of the connector 301 is symmetrically equipped with ear plates 313. The end of the ear plate 313 is hinged with an outer arm 314. One end of the outer arm 314 is embedded and slidably installed with a slide rod 315. One end of the slide rod 315 is equipped with a clip 316. A permanent magnet 325 is installed inside the clip 316. A slide plate 317 is installed at the other end of the slide rod 315. A connecting pipe 318 is connected to one side of the outer arm 314. A side cylinder 319 is embedded in the outer wall of the connector 301 at the position corresponding to the other end of the outer arm 314. A slide tube 320 is slidably installed at one end of the side cylinder 319. A universal head 321 is installed at one end of the slide tube 320. A slip ring 322 is installed at the other end of the slide tube 320 inside the side cylinder 319. An inner opening 323 is opened at the other end of the side cylinder 319. The slide tube 320 is connected to the outer arm 314 through the universal head 321. The space inside the outer arm 314 outside the slide rod 315 is connected to the slide tube 320 through the connecting pipe 318. The inner opening 323 is connected to the through opening 312 through the guide ring 311 to perform axial limiting and improve stability. Compression springs 324 are sleeved on the outer sides of both the slide tube 320 and the slide rod 315.

[0023] The working principle and usage process of this invention: When using this device to conduct a water test at the fire-fighting terminal, first rotate the locking head 307 to adjust its screw-in depth into the connector 301, releasing its pressure on the air cushion 306 and the rubber ring 305. Under the elastic restraint of the rubber ring 305 and the rubber ring 304, each locking guard plate 303 will automatically deflect and shift, widening the gap between them. At the same time, without the restriction of the locking head 307, the air cushion 306 will naturally expand under the elastic force. During this process, the air inside the ring gasket 308 will flow back to the air cushion 306 through the through pipe 309, and the ring gasket 308 will contract accordingly, so that the internal diameter of the connector 301 reaches its maximum. At this point, align the connector 301 with the test section of the fire-fighting terminal, press the outer arm 314 to deflect around the ear plate 313, open the gap between the two clips 316, allow the test section of the fire-fighting terminal to pass through the locking head 307, and let its end pass through the rubber ring 304 and the ring washer 308 in sequence into the connector 301, so that its end abuts against the locking pad 310. Then release the outer arm 314. Under the elastic support of the spring 324 on the outside of the connecting pipe 318, the outer arm 314 will deflect around the ear plate 313 and reset. During this process, the connector 301 can be pushed and pressed further, so that the locking pad 310 abuts against the end of the pipe section to be tested with greater force. The flared structure of the locking pad 310 makes the depth of the pipe section to be tested inserted into the locking pad 310 increase while the locking pad 310 is opened, thereby increasing the contact surface between the locking pad 310 and the end of the pipe section to be tested. At the same time, the clamp 316 can be stretched to make a fine adjustment of its position, so that during the deflection and reset of the outer arm 314, it tightly fastens the outer flange of the pipe section to be tested under the elastic support of the spring 324 on the outside of the connecting tube 318. During this process, the permanent magnet 325 will also be attracted to the tube segment to be tested under the action of magnetic force. In addition, under the elastic force limitation of the spring 324 on the outside of the slide rod 315, the slide rod 315 will always maintain the tendency to retract into the outer arm 314, pulling the clamp 316 towards the outer arm 314, and further pulling the connector 301, so that it keeps it close to the tube segment to be tested, giving it initial elastic support and achieving initial limiting and fixing of it. At this point, the locking head 307 can be rotated in the opposite direction to increase its depth into the connector 301 and reset it. As it is screwed in, its inner conical surface will press against the rubber ring 305, and the rubber ring 305 will press against the locking plate 303. The locking plate 303 will move accordingly and overlap in sequence, so that the gap between each locking plate 303 is compressed synchronously. Finally, each adjacent locking plate 303 will overlap alternately end to end in sequence. The rubber ring 304 will also deform and make way in this process. Cooperating with the rubber ring 304, it holds the inner pipe section to be tested, forming the first rigid sealing limit protection. Similarly, during the screwing-in and resetting process of the locking head 307, its end will squeeze the air cushion 306, and the air cushion 306 will be compressed accordingly. Under the pressure, the air inside will be injected into the ring gasket 308 through the through pipe 309. The ring gasket 308 will expand under the support of the internal airflow, and then cooperate with the limiting function of the mounting ring 302 to squeeze and hold the inner side of the test pipe section, forming a second flexible sealing limiting protection. In addition, the locking gasket 310 provides a limiting and clamping effect at the end of the pipe section to be tested, achieving triple sealing and limiting at the connection of the pipe section to be tested. Furthermore, the ring gasket 308 can elastically expand and contract during this process, and the locking plate 303 can also generate adaptive elastic displacement under the limiting effect of the rubber ring 304 and the rubber ring 305. This can accommodate the micro-unevenness at the end of the pipe section to be tested, elastically compensate for common port corrosion, scratches and slight deformation, and further compensate for the coaxiality deviation of the connection by making slight radial floating during this process. Even if the pipe is slightly misaligned, it can guide the connector 301 to clamp at the end of the pipe section to be tested and achieve synchronous alignment. During the subsequent water test, as the valve of the pipe section to be tested is opened, water flows through the pipe section to be tested into connector 301. With the connection of port 312, the water flows into locking pad 310 along port 312. The locking pad 310 will expand accordingly under the action of water pressure, pressing the end of the pipe section to be tested with greater force, and further dynamically compensating for the limiting clamping force on the pipe section to be tested, so that it can adapt to the water pressure during the water test. In addition, since the water injected into the locking pad 310 will not leak out during this process, it will not affect the downstream water pressure test. At the same time, under the flow restriction guidance of the guide ring 311, some water will flow into the side cylinder 319 through the inner opening 323. The slip ring 322 will push the universal head 321 through the slide pipe 320 under the action of water pressure, giving the outer arm 314 support force compensation, so that the clamp 316 can hold the outer flange of the pipe section to be tested with greater force. In addition, with the connection of the connecting pipe 318, the water will flow into the outer arm 314 at the same time, so that the slide plate 317 can pull the slide rod 315 with greater force under the action of water pressure. Furthermore, pressure compensation can be provided to connector 301, so that the end of the pipe section to be tested can be inserted into connector 301 with greater force. This can effectively compensate for the axial locking force on connector 301 during the water test, and prevent connector 301 from falling off under the axial impact of water flow. Similarly, no water flow loss will occur in this process, and it will not affect the downstream water flow pressure test. As water flows into pipe 1, it flows through tapering pipe 202, straight pipe 201 and expanding pipe 203 in sequence, and passes through valve housing 205 and base 204 in sequence, and enters expanding port 206. Then the water flows through guide hole 221 on ring plate 220, through the gap between ring plate 220 and tube core 207, through side groove 219, and into tube core 207, and then through solenoid valve 11. Here, an external hose can be used to connect guide head 222 to external water discharge pipe, and guide the water flowing through solenoid valve 11 into external water discharge pipe. Here, you can choose to close the solenoid valve 11 first to perform a static pressure test. After the static pressure test is completed, you can open the solenoid valve 11 to perform a dynamic pressure test. During this process, as the water flows through the converging pipe 202, the straight pipe 201, and the expanding pipe 203, the converging pipe 202 can naturally guide the fluid to accelerate smoothly, effectively suppressing the vortex and velocity distribution distortion from upstream. At the same time, the contraction and expansion structure formed by the converging pipe 202, the straight pipe 201, and the expanding pipe 203 can generate a pressure gradient that can smooth out water flow disturbances and reduce the requirement for the length of the upstream straight pipe section. Furthermore, during the water test, the absolute pressure sensor 12, differential pressure sensor 13, and temperature sensor 14 can more stably detect the water flow pressure and accurately feed back the absolute static pressure value at the straight pipe 201 and the differential pressure value at the inlet of the straight pipe 201 and the converging pipe 202 to the external processor. Based on the mature and reliable differential pressure principle, more accurate differential pressure flow measurement can be achieved. Moreover, the temperature sensor 14 can feed back the real-time temperature parameters of the water flow to the external processor, and can perform real-time dynamic compensation for the fluctuation of the water flow density parameters under different temperature conditions. In addition, the constant outflow coefficient of the Venturi tube structure composed of the converging tube 202, the straight tube 201 and the expanding tube 203 can greatly reduce the difficulty of testing, making it suitable for testing under temperature and pressure fluctuation conditions and improving the testing accuracy. During the process of water flowing into the expansion port 206, it will compress the impeller 215 and make it rotate. While achieving the initial unloading of the water flow and reducing the impact force when the water is discharged, the water pressure can be further converted and utilized. The impeller 215 will drive the rotating shaft 216 to rotate. Under the transmission of the bevel gear 217, the drive rod 214 will rotate synchronously and drive the plug plate 213 to move up and down repeatedly inside the slide cavity 218 through the reciprocating thread, and compress the hydraulic fluid. With the connection of the conduit 212, the hydraulic fluid will flow back and forth inside the slide cavity 218 and the convex box 211. During the flow of hydraulic fluid, the inclined surface of the impeller 210 is compressed. Driven by the hydraulic fluid, the impeller 210 drives the valve plate 209 to rotate synchronously via the shaft 208. As the valve plate 209 rotates, the size of the flow opening when the water flows through the valve body 205 is changed cyclically. This effectively achieves pressure testing of the water flow under different valve openings, enabling real-time dynamic monitoring of the water flow at different flow rates. This allows the external processor to combine the real-time differential pressure measurement results to generate dynamic comparison curves under different flow conditions, making the detection results more comprehensive. As the water flows into the flared head 206, it is divided into streams as it passes through the guide hole 221, generating rotational motions in different directions. These streams collide and rub against each other within the gap of the ring plate 220, converting energy into minute amounts of heat energy and consuming most of the water's kinetic energy. Subsequently, as the water flows through the side groove 219 into the tube core 207, the reduced flow area further consumes energy, completely dissipating it. This makes the water flowing out of the guide head 222 very uniform and stable, and reduces noise. It should be added that when the water pressure fluctuates abnormally during the water test, with the insertion tube 225 connected, the water will enter the chamber 223 through the insertion tube 225, squeezing the slide plate 224, causing the slide plate 224 to slide along the chamber 223, squeezing the air between the two slide plates 224, converting the water pressure into the internal energy of the air for temporary buffering and storage. This can reduce the water pressure fluctuation during the test and reduce the water pressure impact on the connector 301, making the connection more stable. In addition, the flow stabilization effect of the converging tube 202, straight tube 201 and expanding tube 203 can make the test results more accurate. Furthermore, the energy dissipation effect of the internal structure of the expanding nozzle 206 can make the discharged water flow more stable.

[0024] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. 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 water testing device for fire-fighting terminals, comprising a pipe body (1), characterized in that: An integrated detection mechanism (20) is installed inside the tube body (1); The integrated testing mechanism (20) includes a straight pipe (201); A straight pipe (201) is installed inside the pipe body (1). An absolute pressure sensor (12) is installed in the middle of the outer curved surface of the pipe body (1). A differential pressure sensor (13) and a temperature sensor (14) are installed on both sides of the outer curved surface of the pipe body (1) on the straight pipe (201). A tapered pipe (202) and a diffuser (203) are connected to both ends of the straight pipe (201). A base (204) is installed on one side of the pipe body (1). A valve shell (205) and a flaring head (206) are installed at both ends of the base (204). A tube core (207) is embedded at one end of the flaring head (206). A solenoid valve (11) is installed at the end of the tube core (207). A shaft (208) is rotatably mounted on the top of the outer curved surface of the valve housing (205). A valve plate (209) and a rotating wheel (210) are respectively connected to the two ends of the shaft (208). A convex box (211) is installed on the outer curved surface of the valve housing (205) at the position corresponding to the rotating wheel (210). A guide tube (212) is symmetrically mounted on the outer curved surface of the convex box (211). A drive rod (214) is rotatably mounted on the top of the base (204). A plug plate (213) is threaded on the outside of the drive rod (214). An impeller (215) is rotatably mounted on the other end of the expansion joint (206). A rotating shaft (216) is mounted on the end of the impeller (215). A bevel gear (217) is mounted on the end of both the rotating shaft (216) and the drive rod (214).

2. The water testing device for fire-fighting terminals according to claim 1, characterized in that, The base (204) has a sliding cavity (218) at the position corresponding to the plug plate (213) inside. The outer wall of the tube core (207) has a number of side grooves (219) at equal angles along the circumferential direction. The inner wall of the expansion joint (206) has a number of ring plates (220) evenly installed at equal intervals at the position outside the tube core (207). The end face of the ring plate (220) has a number of guide holes (221) evenly installed at equal intervals. The end of the solenoid valve (11) is equipped with a guide head (222). The base (204) has a box (223) installed at the bottom. The box (223) has a sliding plate (224) symmetrically slidably installed inside. The top edge of the box (223) has a tube (225) symmetrically installed. The box (223) is filled with air at the position between the two sliding plates (224).

3. The water testing device for fire-fighting terminals according to claim 1, characterized in that, The inner diameters of the converging tube (202) and the expanding tube (203) gradually expand away from the straight tube (201), and the converging tube (202), the expanding tube (203) and the straight tube (201) together form a Venturi effect tube structure. The detection end of the absolute pressure sensor (12) is connected to the straight tube (201), the detection end of the differential pressure sensor (13) is connected to the middle of the straight tube (201) and the port of the converging tube (202), and the detection end of the temperature sensor (14) is connected to the port of the expanding tube (203).

4. A water testing device for fire-fighting terminals according to claim 2, characterized in that, The base (204) is connected to the pipe body (1) through the valve housing (205). The ends of the tapering tube (202) and the expanding tube (203) are fixedly connected to the pipe body (1). The valve housing (205) fits into the valve plate (209). The space inside the sliding cavity (218) located on both sides of the plug plate (213) is connected to the ends of the guide tubes (212) on both sides of the convex box (211). The sliding cavity (218) and the convex box (211) are both filled with hydraulic fluid. An indicator head (21) is installed at the end of the shaft (208).

5. A water testing device for fire-fighting terminals according to claim 2, characterized in that, The drive rod (214) is a reciprocating lead screw. The drive rod (214) and the rotating shaft (216) are connected by a bevel gear (217). An inertia ring (22) is connected to the outer curved surface of the rotating shaft (216).

6. A water testing device for fire-fighting terminals according to claim 2, characterized in that, The inner diameter of the expanding mouth (206) gradually expands from the impeller (215) side to the core (207) side. The core (207) and the ring plate (220) are both conical, and the conical surface of the core (207) and the opening direction of the side groove (219) are perpendicular to the opening direction of the guide hole (221).

7. A water testing device for fire-fighting terminals according to claim 1, characterized in that, A floating connection mechanism (30) is installed at the other end of the tube (1); The floating connection mechanism (30) includes a connector (301); A connector (301) is installed at the other end of the pipe body (1). An installation ring (302) is installed inside the connector (301). A rubber ring (305) is installed at one end of the installation ring (302). Several locking guard plates (303) are installed at equal angles along the circumferential direction on the inner wall of the rubber ring (305). Several rubber rings (304) are installed at equal intervals at the ends of the locking guard plates (303). An air cushion (306) is sleeved on the outside of the installation ring (302). A locking head (307) is installed at the end of the connector (301) by thread. A ring gasket (308) is embedded in the inner wall of the installation ring (302). A through pipe (309) is connected to one side of the inner curved surface of the air cushion (306). A locking pad (310) is installed at one end of the ring pad (308), and a guide ring (311) is installed at the end of the locking pad (310). The inner wall of the guide ring (311) is provided with several through holes (312) at equal angles along the circumferential direction. Ear plates (313) are symmetrically installed on the outer wall of the connector (301). An outer arm (314) is hinged to the end of the ear plate (313). A slide rod (315) is slidably installed at one end of the outer arm (314). A clip (316) is installed at one end of the slide rod (315). A permanent magnet (325) is installed inside the clip (316). The other end of the slide rod (315) is equipped with a slide plate (317), and a connecting pipe (318) is connected to one side of the side end face of the outer arm (314). A side tube (319) is embedded in the outer wall of the connector (301) at the position corresponding to the other end of the outer arm (314). A slide tube (320) is slidably embedded in one end of the side tube (319). A universal head (321) is installed at one end of the slide tube (320). A slip ring (322) is installed at the other end of the slide tube (320) inside the side tube (319). An inner opening (323) is opened at the other end of the side tube (319). A compression spring (324) is sleeved on the outside of both the slide tube (320) and the slide rod (315).

8. A water testing device for fire-fighting terminals according to claim 7, characterized in that, The inner wall of the locking head (307) is conical, and the inner radial direction of the locking head (307) gradually contracts towards the rubber ring (305). The inner cavity of the air cushion (306) is connected to the inner cavity of the ring pad (308) through the tube (309). The air cushion (306), the ring pad (308) and the lock guard (310) are all elastic airbags, and the air cushion (306) and the ring pad (308) are filled with air. The lock guard plate (303) is inclined, and each lock guard plate (303) alternates from end to end in sequence. The two ends of the lock guard plate (303) are connected to the rubber ring (304) and the rubber ring (305) respectively.

9. A water testing device for fire-fighting terminals according to claim 7, characterized in that, The locking pad (310) is trumpet-shaped, and the inner radial direction of the locking pad (310) gradually narrows away from the ring pad (308). The inner cavity of the locking pad (310) is connected to the through port (312). The connector (301) and the base (204) are both connected to the box body (223) through the insertion tube (225).

10. A water testing device for fire-fighting terminals according to claim 7, characterized in that, The slide tube (320) is connected to the outer arm (314) via a universal joint (321). The space inside the outer arm (314) located outside the slide rod (315) is connected to the slide tube (320) via a connecting pipe (318). The inner opening (323) is connected to the through opening (312) via a guide ring (311).

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