Municipal drainage pipeline leakage flow velocity detection device

Abstract

The invention relates to the technical field of pipeline detection, and discloses a municipal drainage pipeline leakage flow velocity detection device which comprises an L-shaped clamping arm and further comprises a detection frame, the detection frame and the L-shaped clamping arm are detachably connected into a whole through a connecting assembly, the L-shaped clamping arm is rotationally connected with a clamping lead screw, the L-shaped clamping arm is slidably connected with a pair of plugging pliers driven by the clamping lead screw, and the L-shaped clamping arm is provided with a clamping groove. A blocking assembly is installed on the blocking clamp, a valve pipe is communicated with the blocking assembly, a ball valve assembly is installed in the valve pipe, a transmission module is installed on the detection frame, and the ball valve assembly and the clamping lead screw are driven by the transmission module. According to the device, a measuring cylinder type measuring structure is adopted during measurement, so that the influence of water airflow on the measuring precision during measurement is effectively reduced, and the detection error is further reduced; meanwhile, the detection device can synchronously realize permeation plugging and permeation flow velocity detection during detection, and can complete separation and reuse of the permeation flow velocity detection device after the permeation flow velocity detection is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline detection, and more specifically, to a leakage flow velocity detection device for a municipal drainage pipeline. Background Art

[0002] In municipal drainage, pipes are needed to drain wastewater. After long-term use, cracks will appear on the surface of the pipes, causing pipe leakage. When the flow rate of pipe leakage is too large, the size of the cracks will expand, causing sewage to seep out or garbage to pour out of the cracks, affecting municipal drainage projects. Therefore, it is necessary to design a pipe leakage flow rate detector.

[0003] In the prior art, a patent document with publication number CN220228775U discloses a pipeline leakage flow rate detector, including a detection chamber body, the outside of which is provided with a detection component capable of sealing gaps and a retractable and adjustable movable component, the detection component comprising a limit ring plate arranged on the outer wall of the detection chamber body, the number of the limit ring plates being two groups, and a filling structure capable of filling the gaps being arranged between the two groups of limit ring plates, the above device achieves the purpose of detecting the pipeline leakage flow rate and filling the leakage gap, but the above detection device relies on the water flow to drive the water flow guide plate to rotate for measurement during detection, and the above measurement method is easily affected by the airflow mixed in the water body during measurement, thereby reducing the detection error, and the existing detection device cannot simultaneously realize infiltration sealing and infiltration flow rate detection during detection and complete the separation and reuse of the infiltration flow rate detection device after the infiltration flow rate detection is completed, based on this, the present invention provides a municipal drainage pipeline leakage flow rate detection device to solve the technical problems raised in the above background technology. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a municipal drainage pipe leakage flow rate detection device. The device adopts a measuring cylinder type measurement structure during measurement, so as to effectively reduce the influence of water airflow on the measurement accuracy during measurement, thereby reducing the detection error. At the same time, the detection device can simultaneously realize infiltration blocking and infiltration flow rate detection during detection and complete the separation and reuse of the infiltration flow rate detection device after the infiltration flow rate detection is completed.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a municipal drainage pipe leakage flow rate detection device, comprising an L-shaped clamp arm and a detection frame, wherein the detection frame and the L-shaped clamp arm are detachably connected to each other through a connecting assembly, the L-shaped clamp arm is rotatably connected to a clamping screw, the L-shaped clamp arm is slidably connected to a plugging pliers driven by the clamping screw, a plugging assembly is installed on the plugging pliers, a valve pipe is connected to the plugging assembly, a ball valve assembly is installed in the valve pipe, a transmission module is installed on the detection frame, the ball valve assembly and the clamping screw are both driven by the transmission module, a measuring cylinder with a bottom opening and adapted to be connected to the valve pipe is installed on the plugging pliers, a breathable floating plate is slidably connected to the inner wall of the measuring cylinder, a trigger disk is slidably connected to the inner top of the measuring cylinder, a group of pressure sensors are installed between the trigger disk and the measuring cylinder, a group of overflow holes are opened on the measuring cylinder and at a position corresponding to the bottom of the trigger disk, and an electronic detection component is installed on the detection frame.

[0006] As a preferred technical solution of the present invention, the connecting assembly includes two clamping tubes installed on the L-shaped clamp arm, the two clamping tubes are made of iron, and the two clamping tubes are provided with a magnetic suction groove with a top opening, and electromagnetic columns are installed on the detection frame and at positions corresponding to the two magnetic suction grooves, and the two electromagnetic columns are respectively connected and adapted with the two magnetic suction grooves, a threaded column is threadedly installed on the detection frame, and a threaded pipe is installed on the L-shaped clamp arm, and the threaded column is threadedly adapted with the threaded pipe.

[0007] As a preferred technical solution of the present invention, the ball valve assembly includes a valve body installed on a valve tube, a valve ball is provided on the inner side of the valve body, a valve shaft is rotatably connected to the valve body, the valve shaft is fixedly connected to the valve ball, a valve channel that is adapted to communicate with the valve tube is fixedly provided on the valve ball, a shaft sleeve is rotatably installed on the valve body, bevel gears are installed on the shaft sleeve and the valve shaft, the two bevel gears are meshed with each other, and a connecting groove with openings at both ends is fixedly provided inside the shaft sleeve and is adapted to be connected to the transmission module.

[0008] As a preferred technical solution of the present invention, the transmission module includes a linkage shaft and a transmission shaft rotatably connected to the inner wall of the detection frame, the linkage shaft is slidably adapted to the connecting groove, the cross-sections of the linkage shaft and the connecting groove are both regular polygons, the bottom end of the transmission shaft and the top end of the clamping screw are both equipped with transmission plates, the surface of the transmission plate is covered with friction patterns, and drive buttons are installed on the linkage shaft and the transmission shaft.

[0009] As a preferred technical solution of the present invention, the blocking assembly includes a contoured pressure bag installed on the bottom surface of the blocking clamp, a blocking rubber block is provided below the contoured pressure bag, the valve tube is slidably connected to the contoured pressure bag, the bottom end of the valve tube is connected to the blocking rubber block, a limit spring is provided on the valve tube and corresponding to the position between the valve body and the blocking clamp, a first T-shaped guide rod is fixedly installed on the blocking clamp, and the first T-shaped guide rod is slidably connected to the valve body.

[0010] As a preferred technical solution of the present invention, a handle is fixedly provided on the detection frame, a single-chip microcomputer is installed on the detection frame, a display screen is fixedly provided on the single-chip microcomputer, and a data end of the pressure sensor is connected to the single-chip microcomputer data.

[0011] As a preferred technical solution of the present invention, the bottom end of the measuring cylinder is open, a sealing ring adapted to be connected to the measuring cylinder is fixedly installed on the top of the valve tube, the measuring cylinder is made of a transparent material, a scale is fixedly provided on the outer surface of the measuring cylinder, and the axis of the overflow hole is perpendicular to the axis of the measuring cylinder.

[0012] As a preferred technical solution of the present invention, the electronic detection component includes a linear drive module, a listening seat and a speed measuring seat, the linear drive module is transmission-connected with a pressure platform, a group of second T-shaped guide rods are installed on the top surfaces of the listening seat and the speed measuring seat, each of the second T-shaped guide rods is slidably connected to the pressure platform, and a contoured compression spring is sleeved on each of the second T-shaped guide rods and corresponding to the position between the listening seat and the pressure platform, a listening tube is installed on the bottom surface of the listening seat, and an audio collection sensor and a humidity sensor are respectively installed on the listening tube, a radar water flow speed meter is installed on the speed measuring seat, and the data ends of the audio collection sensor, the humidity sensor and the radar water flow speed meter are all connected to the data of the single-chip microcomputer.

[0013] As a preferred technical solution of the present invention, two groups of symmetrically arranged first clamping rubber blocks are provided at the bottom of the L-shaped clamp arm, and second clamping rubber blocks are installed on the bottom surface of the speed measuring seat and at positions corresponding to both sides of the radar water flow speed meter.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This device adopts a measuring cylinder type measuring structure during measurement, which effectively reduces the influence of water airflow on the measurement accuracy during measurement, thereby reducing the detection error. At the same time, this detection device can simultaneously realize infiltration blocking and infiltration flow rate detection during detection, and complete the separation and reuse of the infiltration flow rate detection device after the infiltration flow rate detection is completed.

[0015] 2. The present invention sets the breathable material of the breathable floating plate so that the influence of the gas in the pipeline on the measurement accuracy of the permeation flow rate can be effectively reduced when measuring the permeation flow rate. When the permeation flow rate is detected, the measuring cylinder is connected to the valve tube, and the valve ball is opened. When the pressure sensor generates a set pressure value, the time difference between the time when the valve ball is opened and the time when the pressure value is generated is recorded, and then the permeation flow rate of the pipeline is quickly measured.

[0016] 3. When measuring the infiltration flow rate of the present invention, under the driving action of the linear drive module, the listening tube and the speed measuring seat are fully fitted with the pipeline, and then the moisture infiltration amount of the pipeline is monitored, the listening leakage monitoring and the radar speed monitoring are carried out. After the leakage detection is completed, the valve ball is closed, and the detection frame is separated from the L-shaped clamp arm, and then the detection components can be reused subsequently. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a municipal drainage pipe leakage flow velocity detection device according to the present invention; Figure 2 It is a schematic diagram of the structure of the transmission disc and the blocking pliers of the present invention; Figure 3 It is a schematic diagram of the structure of the measuring cylinder and the listening seat of the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of the threaded column and the sealing rubber block of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the local enlarged structure at point A in the middle; Figure 6 For the present invention Figure 4 A schematic diagram of the local enlarged structure at B in the middle; Figure 7 It is a structural schematic diagram of the single chip microcomputer and the threaded column of the present invention; Figure 8 It is a schematic diagram of the structure of the detection frame and the humidity sensor of the present invention; Fig. 9 It is a structural schematic diagram of the listening microphone of the present invention.

[0018] In the figure: 1, L-shaped clamp arm; 2, detection frame; 3, clamping screw; 4, plugging pliers; 5, valve tube; 6, measuring cylinder; 7, air-permeable floating plate; 8, trigger plate; 9, pressure sensor; 10, overflow hole; 11, clamp tube; 12, electromagnetic column; 13, threaded column; 14, valve body; 15, valve ball; 16, valve shaft; 17, shaft sleeve; 18, linkage shaft; 19, transmission shaft; 20, transmission plate; 21, contoured pressure bag; 22, Sealing rubber block; 23. Limiting spring; 24. First T-shaped guide rod; 25. Handle; 26. Single chip microcomputer; 27. Linear drive module; 28. Listening seat; 29. ​​Speed ​​measuring seat; 30. Pressure platform; 31. Second T-shaped guide rod; 32. Profiled compression spring; 33. Listening tube; 34. Audio acquisition sensor; 35. Humidity sensor; 36. Radar water flow speed meter; 37. Second clamping rubber block; 38. First clamping rubber block. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figures 1 to 9 As shown, the present invention provides a municipal drainage pipe leakage flow rate detection device, comprising an L-shaped clamp arm 1, and a detection frame 2, on which a handle 25 is fixedly provided, a single-chip computer 26 is installed on the detection frame 2, and a display screen is fixedly provided on the single-chip computer 26; The detection frame 2 and the L-shaped clamp arm 1 are detachably connected as one through a connecting component; The connection assembly includes two clamping tubes 11 installed on the L-shaped clamp arm 1. Both clamping tubes 11 are made of iron. Both clamping tubes 11 are provided with magnetic suction grooves with top openings. Electromagnetic columns 12 are installed on the detection frame 2 at positions corresponding to the two magnetic suction grooves. The two electromagnetic columns 12 are respectively connected and adapted to the two magnetic suction grooves; Electromagnets are installed inside the two electromagnetic columns 12. When the electromagnets are powered on, they generate magnetic attraction and lose their magnetism when the power is turned off. A threaded column 13 is threadedly mounted on the detection frame 2, a threaded pipe is mounted on the L-shaped clamp arm 1, and the threaded column 13 is threadably matched with the threaded pipe; When the connection strength between the detection frame 2 and the L-shaped clamp arm 1 needs to be improved, the connection strength between the detection frame 2 and the L-shaped clamp arm 1 can be effectively improved by adapting the threaded column 13 to the threaded tube. Two groups of symmetrically arranged first clamping rubber blocks 38 are provided at the bottom of the L-shaped clamp arm 1, a clamping screw 3 is rotatably connected to the L-shaped clamp arm 1, a plugging clamp 4 driven by the clamping screw 3 is slidably connected to the L-shaped clamp arm 1, a plugging assembly is installed on the plugging clamp 4, and a valve pipe 5 is connected to the plugging assembly; The plugging assembly includes a contoured pressure bag 21 installed on the bottom surface of the plugging clamp 4, a plugging rubber block 22 is provided below the contoured pressure bag 21, the valve tube 5 is slidably connected to the contoured pressure bag 21, the bottom end of the valve tube 5 is communicated with the plugging rubber block 22, a limit spring 23 is sleeved on the valve tube 5 and corresponds to the position between the valve body 14 and the plugging clamp 4, a first T-shaped guide rod 24 is fixedly installed on the plugging clamp 4, and the first T-shaped guide rod 24 is slidably connected to the valve body 14; When it is necessary to implement the plugging operation of the leaking point on the municipal drainage pipe, the plugging rubber block 22 covers the leaking point from above the leaking point. During plugging, the clamping screw 3 drives the plugging pliers 4, so that the contoured pressure bag 21 can apply sufficient contoured pressure to the rubber plugging block and improve the contoured fit between the plugging rubber block 22 and the pipe, thereby improving the plugging effect of the pipe; A ball valve assembly is installed in the valve tube 5, a transmission module is installed on the detection frame 2, and the ball valve assembly and the clamping screw 3 are driven by the transmission module; The ball valve assembly includes a valve body 14 mounted on the valve tube 5, a valve ball 15 is arranged on the inner side of the valve body 14, a valve shaft 16 is rotatably connected to the valve body 14, the valve shaft 16 is fixedly connected to the valve ball 15, a valve passage adapted to communicate with the valve tube 5 is fixedly provided on the valve ball 15, a shaft sleeve 17 is rotatably mounted on the valve body 14, bevel gears are installed on the shaft sleeve 17 and the valve shaft 16, the two bevel gears are meshed with each other, and a coupling groove with openings at both ends and adapted to connect with the transmission module is fixedly provided inside the shaft sleeve 17; The transmission module includes a linkage shaft 18 and a transmission shaft 19 rotatably connected to the inner wall of the detection frame 2, the linkage shaft 18 is slidably adapted to the coupling groove, and the cross-sections of the linkage shaft 18 and the coupling groove are both regular polygons; The bottom end of the transmission shaft 19 and the top end of the clamping screw 3 are both equipped with a transmission disc 20, the surface of the transmission disc 20 is evenly covered with friction lines, and the linkage shaft 18 and the transmission shaft 19 are both equipped with a driving button; By setting the friction lines on the two transmission discs 20, the transmission shaft 19 can drive the clamping screw 3 to rotate synchronously after the two transmission rod discs are fully pressed and fitted together; The plugging pliers 4 are provided with a measuring cylinder 6 with an opening at the bottom and adapted to communicate with the valve tube 5; The bottom end of the measuring cylinder 6 is open, the measuring cylinder 6 is made of a transparent material, and a scale is fixedly provided on the outer surface of the measuring cylinder 6; A sealing ring adapted to be connected to the measuring cylinder 6 is fixedly installed on the top of the valve tube 5; By setting the sealing ring, the sealing performance when the measuring cylinder 6 is connected to the valve tube 5 is effectively ensured; The inner wall of the measuring cylinder 6 is slidably connected with a breathable floating plate 7, the inner top of the measuring cylinder 6 is slidably connected with a trigger disk 8, a group of pressure sensors 9 are installed between the trigger disk 8 and the measuring cylinder 6, the data end of the pressure sensor 9 is data-connected with the single-chip computer 26, and a group of overflow holes 10 are opened on the measuring cylinder 6 and at a position corresponding to the bottom of the trigger disk 8; The axis of the overflow hole 10 is perpendicular to the axis of the measuring cylinder 6; The air-permeable floating plate 7 is made of an air-permeable material. By setting the air-permeable floating plate 7 to an air-permeable material, the influence of the gas in the pipeline on the measurement accuracy of the permeation flow rate can be effectively reduced during the permeation flow rate measurement. When the permeation flow rate is detected, the measuring cylinder 6 is connected to the valve tube 5, the valve ball 15 is opened, and when the pressure sensor 9 generates a set pressure value, the time difference between when the valve ball 15 is opened and when the pressure value is generated is recorded, and then the permeation flow rate of the pipeline is quickly measured; The detection frame 2 is equipped with electronic detection components.

[0021] The electronic detection component includes a linear drive module 27, a listening seat 28 and a speed measuring seat 29. The linear drive module 27 is connected to a pressure platform 30 in a transmission manner. A group of second T-shaped guide rods 31 are installed on the top surfaces of the listening seat 28 and the speed measuring seat 29. Each second T-shaped guide rod 31 is slidably connected to the pressure platform 30. A contoured compression spring 32 is sleeved on each second T-shaped guide rod 31 and at a position corresponding to the listening seat 28 and the pressure platform 30; A listening tube 33 is installed on the bottom surface of the listening seat 28, and an audio collection sensor 34 and a humidity sensor 35 are installed on the listening tube 33 respectively. A radar water flow speed meter 36 is installed on the speed measuring seat 29, and the data ends of the audio collection sensor 34, the humidity sensor 35 and the radar water flow speed meter 36 are all connected to the single-chip computer 26.

[0022] Second clamping rubber blocks 37 are installed on the bottom surface of the speed measuring seat 29 and at positions corresponding to both sides of the radar water flow speed meter 36.

[0023] When measuring the infiltration flow rate, under the driving action of the linear drive module 27, the listening tube 33 and the speed measuring seat 29 are fully fitted with the pipeline, and then the moisture infiltration amount of the pipeline, the listening leakage detection and the radar speed measurement are monitored.

[0024] The working principle of the present invention is as follows: before working, the detection frame 2 is connected to the L-shaped clamp arm 1 as a whole. When it is necessary to implement the plugging operation of the leak point on the municipal drainage pipeline, the plugging rubber block 22 covers the leak point from above the leak point. When plugging, the clamping screw 3 drives the plugging pliers 4, so that the profiling pressure bag 21 can apply sufficient profiling pressure to the rubber plugging block and improve the profiling fit between the plugging rubber block 22 and the pipeline, thereby improving the plugging effect of the pipeline. When the permeation flow rate is detected, the measuring cylinder 6 is connected to the valve pipe 5, and the valve ball 1 5 is opened, when the pressure sensor 9 generates a set pressure value, the time difference between when the valve ball 15 is opened and when the pressure value is generated is recorded, and then the permeation flow rate of the pipeline is quickly measured. When measuring the permeation flow rate, under the driving action of the linear drive module 27, the listening tube 33 and the speed measuring seat 29 are fully fitted with the pipeline, and then the moisture permeation amount of the pipeline is monitored, the listening leakage monitoring and the radar speed monitoring are carried out. After the leakage detection is completed, the valve ball 15 is closed, and the detection frame 2 is separated from the L-shaped clamp arm 1, and then the detection components can be reused later.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A municipal drainage pipe leakage flow rate detection device, comprising an L-shaped clamp arm (1), characterized in that: The apparatus further comprises a detection frame (2), wherein the detection frame (2) and the L-shaped clamp arm (1) are detachably connected to form an integral body via a connecting assembly, wherein a clamping screw (3) is rotatably connected to the L-shaped clamp arm (1), wherein a plugging clamp (4) driven by the clamping screw (3) is slidably connected to the L-shaped clamp arm (1), wherein a plugging assembly is mounted on the plugging clamp (4), wherein the plugging assembly is connected to a valve pipe (5), wherein a ball valve assembly is mounted in the valve pipe (5), wherein a transmission module is mounted on the detection frame (2), wherein the ball valve assembly and the clamping screw (3) are connected to each other via a slidable connection between the L-shaped clamp arm (1), wherein a slidable connection between the L-shaped clamp arm (1) and the plugging clamp (4) is driven by the clamping screw (3), wherein a slidable connection between the L-shaped clamp arm (1) and the plugging clamp (4) is driven by the clamping screw (3), wherein a slidable connection between the L-shaped clamp arm (1) and the plugging assembly is mounted on the slidable connection between the L-shaped clamp arm (1 ... 3) are driven by a transmission module, the plugging pliers (4) are provided with a measuring cylinder (6) with an opening at the bottom end and adapted to communicate with the valve tube (5), the inner wall of the measuring cylinder (6) is slidably connected with a breathable floating plate (7), the inner top of the measuring cylinder (6) is slidably connected with a trigger disk (8), a group of pressure sensors (9) are provided between the trigger disk (8) and the measuring cylinder (6), a group of overflow holes (10) are provided on the measuring cylinder (6) and at a position corresponding to the bottom of the trigger disk (8), and an electronic detection component is provided on the detection frame (2).

2. A municipal drainage pipe leakage flow rate detection device according to claim 1, characterized in that: The connection assembly comprises two clamping tubes (11) mounted on an L-shaped clamp arm (1), the two clamping tubes (11) being made of iron, the two clamping tubes (11) being provided with a magnetic suction groove with a top opening, the detection frame (2) being provided with an electromagnetic column (12) at a position corresponding to the two magnetic suction grooves, the two electromagnetic columns (12) being respectively clamped and matched with the two magnetic suction grooves, the detection frame (2) being provided with a threaded column (13) being threadedly mounted, the L-shaped clamp arm (1) being provided with a threaded pipe, the threaded column (13) being threadedly matched with the threaded pipe.

3. A municipal drainage pipe leakage flow rate detection device according to claim 2, characterized in that: The ball valve assembly comprises a valve body (14) mounted on a valve tube (5), a valve ball (15) being provided on the inner side of the valve body (14), a valve shaft (16) being rotatably connected to the valve body (14), the valve shaft (16) being fixedly connected to the valve ball (15), a valve channel being fixedly provided on the valve ball (15) and being adapted to communicate with the valve tube (5), a shaft sleeve (17) being rotatably mounted on the valve body (14), bevel gears being installed on both the shaft sleeve (17) and the valve shaft (16), the two bevel gears being meshed with each other, and a coupling groove having openings at both ends being fixedly provided inside the shaft sleeve (17) and being adapted to be connected to the transmission module.

4. A municipal drainage pipe leakage flow rate detection device according to claim 3, characterized in that: The transmission module comprises a linkage shaft (18) and a transmission shaft (19) rotatably connected to the inner wall of the detection frame (2); the linkage shaft (18) is slidably adapted to the coupling groove; the cross-sections of the linkage shaft (18) and the coupling groove are both regular polygons; a transmission disk (20) is installed at the bottom end of the transmission shaft (19) and the top end of the clamping screw (3); the surface of the transmission disk (20) is covered with friction patterns; and a driving button is installed on the linkage shaft (18) and the transmission shaft (19).

5. A municipal drainage pipe leakage flow rate detection device according to claim 1, characterized in that: The blocking assembly comprises a contoured pressure bag (21) mounted on the bottom surface of the blocking clamp (4), a blocking rubber block (22) being provided below the contoured pressure bag (21), the valve tube (5) being slidably connected to the contoured pressure bag (21), the bottom end of the valve tube (5) being communicated with the blocking rubber block (22), a limit spring (23) being sleeved on the valve tube (5) and corresponding to the position between the valve body (14) and the blocking clamp (4), a first T-shaped guide rod (24) being fixedly mounted on the blocking clamp (4), the first T-shaped guide rod (24) being slidably connected to the valve body (14).

6. A municipal drainage pipe leakage flow rate detection device according to claim 1, characterized in that: A handle portion (25) is fixedly provided on the detection frame (2), a single-chip computer (26) is mounted on the detection frame (2), a display screen is fixedly provided on the single-chip computer (26), and a data terminal of the pressure sensor (9) is data-connected to the single-chip computer (26).

7. A municipal drainage pipe leakage flow rate detection device according to claim 1, characterized in that: The bottom end of the measuring cylinder (6) is open, and a sealing ring adapted to be connected to the measuring cylinder (6) is fixedly mounted on the top of the valve tube (5). The measuring cylinder (6) is made of a transparent material, and a scale is fixedly arranged on the outer surface of the measuring cylinder (6). The axis of the overflow hole (10) is perpendicular to the axis of the measuring cylinder (6).

8. A municipal drainage pipe leakage flow rate detection device according to claim 1, characterized in that: The electronic detection component comprises a linear drive module (27), a listening seat (28) and a speed measuring seat (29); the linear drive module (27) is transmission-connected to a pressure platform (30); the top surfaces of the listening seat (28) and the speed measuring seat (29) are both installed with a group of second T-shaped guide rods (31); each of the second T-shaped guide rods (31) is slidably connected to the pressure platform (30); each of the second T-shaped guide rods (31) is on the corresponding listening seat (28) and the pressure platform ( A contoured compression spring (32) is sleeved at a position between the two ends of ...

9. A municipal drainage pipe leakage flow rate detection device according to claim 8, characterized in that: Two groups of symmetrically arranged first clamping rubber blocks (38) are provided at the bottom of the L-shaped clamping arm (1), and second clamping rubber blocks (37) are installed on the bottom surface of the speed measuring seat (29) and at positions corresponding to both sides of the radar water flow speed meter (36).

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