Ultrasonic water meter with water leakage detection function

Abstract

The invention relates to the technical field of water flow detection, in particular to an ultrasonic water meter with a water leakage detection function, the ultrasonic water meter comprises a mounting box, detection boxes and protective barrels, when water flow in a water pipe is detected, the protective barrels in the two detection boxes are in a state of blocking two first detection ports, and the two first detection ports are set according to the positions of the two first detection ports; an ultrasonic signal emitted by the ultrasonic sensor in one protective barrel can be received by the ultrasonic sensor in the other protective barrel, and in the water flow direction in the water pipe, a certain time difference is formed in the transmission process of downstream ultrasonic signals and countercurrent ultrasonic signals. Under the conditions of the calibrated pipe diameter sectional area and the standard measuring pipe length, the water flow can be calculated through the calculation chip, and in the water flow detection process, water in a water pipe does not make direct contact with the ultrasonic sensor, so that impact of water flow on the ultrasonic sensor is reduced, and the damage probability of the ultrasonic sensor is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of water flow detection, and in particular to an ultrasonic water meter with a water leakage detection function. Background Art

[0002] In the field of water resource measurement, ultrasonic water meter is an advanced metering device. When used, two ultrasonic sensors are installed in an oblique manner. The first ultrasonic sensor transmits an ultrasonic signal to the second ultrasonic sensor, and then the second ultrasonic sensor is used to send an ultrasonic signal to the first ultrasonic sensor. One ultrasonic signal is a downstream signal and the other is an upstream signal. The downstream and upstream ultrasonic signals form a certain time difference during the transmission process. Under the calibrated pipe diameter cross-sectional area and the standard measuring pipe length, the water flow rate can be calculated by the computing chip.

[0003] During the flow of fluid, the ultrasonic sensor will be continuously impacted by the fluid and thus bear certain mechanical stress. As time accumulates, this mechanical stress will have an adverse effect on the performance of the sensor. It may cause tiny deformation or displacement of the precision components inside the sensor, thereby affecting the sensor's detection and processing accuracy of water flow signals, causing the water meter's detection accuracy to gradually decrease. Summary of the invention

[0004] The invention provides an ultrasonic water meter with a water leakage detection function to solve the problem of low detection accuracy of the existing ultrasonic water meter.

[0005] The ultrasonic water meter with water leakage detection function of the present invention adopts the following technical scheme:

[0006] An ultrasonic water meter with a water leakage detection function comprises an installation box, a detection box and a protective tube.

[0007] The installation box is sleeved on the outside of the water pipe. The interior of the installation box is hollow, and the water pipe can divide the interior of the installation box into two relatively isolated installation cavities; the water pipe is provided with two first detection ports connecting the interior of the water pipe and the two installation cavities, and in the water flow direction inside the water pipe, there is a preset distance between the two first detection ports; there are two detection boxes, each of which is arranged in an installation cavity; the detection box has a detection cavity inside, and the side wall of the detection box is provided with a second detection port connecting the detection cavity and the installation cavity, and the second detection port is arranged corresponding to the first detection port; a protective tube is arranged in the detection cavity, and the peripheral side wall of the protective tube can be deformed, and when the peripheral side wall of the protective tube is deformed, the first detection port can be blocked through the second detection port; an ultrasonic sensor is arranged inside the protective tube.

[0008] Furthermore, the protective tube includes a first end cover, a second end cover and a first side plate, the second end cover is fixedly connected to the inner wall of the detection box, the first side plate is fixedly connected to the first end cover, and the first side plate is rotatably connected to the second end cover; the ultrasonic sensor is installed on the second end cover; the first side plate is made of elastic deformable material.

[0009] Furthermore, the side wall of the detection box is provided with an auxiliary detection port connecting the detection cavity and the installation cavity. The detection box is rotatably arranged in the installation cavity. An auxiliary cylinder is arranged in the detection cavity. An ultrasonic sensor is arranged inside the auxiliary cylinder. The side wall of the auxiliary cylinder can be deformed. When there is a fault in the ultrasonic sensor inside the protective cylinder, the detection box rotates by a preset angle, and the auxiliary detection port on the detection box can correspond to the first detection port.

[0010] Furthermore, the auxiliary tube includes a third end cover, a fourth end cover and a second side plate, the fourth end cover is fixedly connected to the inner wall of the detection box, the second side plate is fixedly connected to the third end cover, and the second side plate is rotatably connected to the fourth end cover; the ultrasonic sensor is installed on the fourth end cover; the second side plate is made of elastic deformable material.

[0011] Furthermore, a regulating pump is provided in the detection chamber, and the regulating pump is used to adjust the air pressure inside the protective tube and the auxiliary tube.

[0012] Furthermore, a blocking plate is provided on the water pipe, and the blocking plate is used to block the first detection port when the detection box rotates.

[0013] Furthermore, a limit member is provided in the installation box, and the limit member is used to limit the rotation of the detection box in the installation cavity.

[0014] Furthermore, the limiting member includes a limiting ring and a plurality of limiting grooves, the plurality of limiting grooves are arranged on the side walls of the detection box, an eccentric shaft is rotatably arranged on the limiting ring, the axis of the eccentric shaft is parallel to the axis of the limiting ring, and the eccentric shaft is fixedly connected to the inner wall of the installation box; a limiting block is arranged on the limiting ring, and the limiting block can enter the limiting groove.

[0015] Furthermore, a sealing ring is provided at the first detection port.

[0016] Furthermore, a buffer air bag is arranged in the detection cavity, a guide tube is arranged on the installation box, one end of the guide tube abuts against the buffer air bag, and the guide tube is always connected with the inside of the water pipe.

[0017] The beneficial effects of the present invention are as follows: an ultrasonic water meter with a water leakage detection function of the present invention comprises an installation box, a detection box and a protective tube. When it is necessary to detect the liquid flow in a water pipe, the installation box is installed on the outside of the water pipe, the detection box is installed in the installation cavity, and the protective tube is installed in the detection cavity. The protective tube blocks the first detection port through the second detection port to prevent the water flow in the water pipe from entering the installation cavity through the first detection port and the second detection port. When the water flow in the water pipe is detected, the protective tubes in the two detection boxes are in a state of blocking the two first detection ports. According to the position setting of the two first detection ports, the ultrasonic sensor in one of the protective tubes emits an ultrasonic signal which can be received by the ultrasonic sensor in the other protective tube. In the water flow direction in the water pipe, the ultrasonic signals of the downstream and upstream form a certain time difference during the transmission process. Under the condition of the calibrated pipe diameter cross-sectional area and the standard measuring pipe length, the water flow can be calculated by the calculation chip. In the process of detecting the water flow, the water in the water pipe does not directly contact the ultrasonic sensor, thereby reducing the impact of the water flow on the ultrasonic sensor and reducing the probability of damage to the ultrasonic sensor.

[0018] Furthermore, since the water flow in the water pipe can directly contact the outer wall of the protective tube, after the ultrasonic sensor has been running for a period of time, the position where the first side plate of the protective tube contacts the water is prone to damage. By rotating the first end cover of the protective tube, the position where the first side plate of the protective tube contacts the water is changed, thereby extending the life of the protective tube and reducing the frequency of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 A schematic diagram of a structure of an ultrasonic water meter with a water leakage detection function provided by an embodiment of the present invention installed on a water pipe;

[0021] Figure 2 An exploded diagram of the structure of a water pipe, a mounting box and a detection box in an ultrasonic water meter with a water leakage detection function provided by an embodiment of the present invention;

[0022] Figure 3 An exploded diagram of a detection box and internal structure in an ultrasonic water meter with a water leakage detection function provided by an embodiment of the present invention;

[0023] Figure 4A front view of an ultrasonic water meter with a water leakage detection function provided by an embodiment of the present invention installed on a water pipe;

[0024] Figure 5 for Figure 4 Sectional view in the AA direction;

[0025] Figure 6 for Figure 4 Cross-sectional view in the BB direction;

[0026] Figure 7 for Figure 4 Cross-sectional view in CC direction;

[0027] Figure 8 for Figure 6 A partial enlarged view of the first side plate of the protective tube at position D in the middle when it is in a deformed state;

[0028] Fig. 9 A schematic diagram of the partial structure of an installation box in an ultrasonic water meter with a water leakage detection function provided by an embodiment of the present invention.

[0029] In the figure: 110, installation box; 111, installation cavity; 120, first detection port; 130, detection box; 140, second detection port; 150, protective tube; 151, first end cover; 152, second end cover; 153, first side plate; 160, ultrasonic sensor; 170, auxiliary detection port; 180, auxiliary tube; 190, water pipe; 210, regulating pump; 220, sealing plate; 230, limit ring; 240, limit block; 250, sealing ring; 260, buffer airbag; 270, guide tube. DETAILED DESCRIPTION

[0030] 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.

[0031] The serial numbers of the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] like Figures 1 to 9 As shown, an embodiment of the present invention provides an ultrasonic water meter with a water leakage detection function, which includes an installation box 110 , a detection box 130 and a protective tube 150 .

[0034] The installation box 110 is sleeved on the outside of the water pipe 190. The interior of the installation box 110 is hollow. The water pipe 190 can separate the interior of the installation box 110 into two relatively isolated installation chambers 111. The two installation chambers 111 are distributed on both sides of the axial direction of the water pipe 190. The water pipe 190 is provided with two first detection ports 120 that connect the interior of the water pipe 190 and the two installation chambers 111. Specifically, each first detection port 120 connects one installation chamber 111 with the water pipe 190. In the axial direction of the water pipe 190, the water flow inside the water pipe 190 flows along the extension direction of the water pipe 190. There is a certain distance between the two first detection ports 120. Furthermore, there is a preset angle between the connecting line between the two first detection ports 120 and the axial direction of the water pipe 190.

[0035] Two detection boxes 130 are provided, each detection box 130 is arranged in an installation cavity 111, the interior of the detection box 130 is hollow, and the hollow chamber inside the detection box 130 is the detection cavity. The side wall of the detection box 130 is provided with a second detection port 140 connecting the detection cavity and the installation cavity 111. The second detection port 140 is arranged corresponding to the first detection port 120. After the detection box 130 is installed in the installation cavity 111, the first detection port 120 and the second detection port 140 are in a connected state.

[0036] The protective tube 150 is arranged in the detection chamber. After the protective tube 150 is installed in the detection chamber, the protective tube 150 is in a state close to the second detection port 140, and the peripheral side wall of the protective tube 150 can be deformed. The chamber inside the protective tube 150 is in a relatively closed state. When the air pressure inside the protective tube 150 increases, the peripheral side wall of the protective tube 150 can be deformed. When the peripheral side wall of the protective tube 150 is deformed, it can block the first detection port 120 through the second detection port 140. Under the action of the peripheral side wall of the protective tube 150, the water inside the water pipe 190 is prevented from leaving the water pipe 190 through the first detection port 120. When the peripheral side wall of the protective tube 150 blocks the first detection port 120, part of the side wall of the protective tube 150 enters the inside of the water pipe 190 through the first detection port 120. An ultrasonic sensor 160 is arranged inside the protective tube 150, and the ultrasonic signal emitted by the ultrasonic sensor 160 can pass through the protective tube 150. Furthermore, the two detection boxes 130 are divided into a first box and a second box. When the ultrasonic sensor 160 inside the first box emits an ultrasonic signal, the ultrasonic sensor 160 inside the second box can receive the ultrasonic signal. At the same time, when the ultrasonic sensor 160 inside the second box emits an ultrasonic signal, the ultrasonic sensor 160 inside the first box can receive the ultrasonic signal. At this time, the travel path of the ultrasonic signal is at an angle with the axial direction of the water pipe 190. The water flow is calculated in combination with the water flow direction inside the water pipe 190. Furthermore, by providing a protective tube 150, water is prevented from directly contacting the ultrasonic sensor 160, the impact of the water flow on the ultrasonic sensor 160 is reduced, and the probability of damage to the ultrasonic sensor 160 is reduced.

[0037] The ultrasonic water meter with water leakage detection function of the present invention, when it is necessary to detect the liquid flow in the water pipe 190, the installation box 110 is installed on the outside of the water pipe 190, and the detection box 130 is installed in the installation cavity 111, and the protective cylinder 150 is installed in the detection cavity, the protective cylinder 150 blocks the first detection port 120 through the second detection port 140, and prevents the water flow in the water pipe 190 from entering the installation cavity 111 through the first detection port 120 and the second detection port 140. When the water flow in the water pipe 190 is detected, the protective cylinders 150 in the two detection boxes 130 are in a state of blocking the two first detection ports 120, and the protective cylinders 150 in the two detection boxes 130 are in a state of blocking the two first detection ports 120. The position of a detection port 120 is set, and the ultrasonic sensor 160 inside one protective tube 150 emits an ultrasonic signal which can be received by the ultrasonic sensor 160 inside another protective tube 150. In the water flow direction inside the water pipe 190, the downstream and upstream ultrasonic signals form a certain time difference during the transmission process. Under the conditions of the calibrated pipe diameter cross-sectional area and the standard measuring pipe length, the water flow rate can be calculated by the computing chip. In the process of detecting the water flow rate, the water in the water pipe 190 does not directly contact the ultrasonic sensor 160, thereby reducing the impact of the water flow on the ultrasonic sensor 160 and reducing the probability of damage to the ultrasonic sensor 160.

[0038] The protective tube 150 includes a first end cover 151, a second end cover 152 and a first side plate 153. The second end cover 152 is fixedly connected to the inner wall of the detection box 130, the first side plate 153 is fixedly connected to the first end cover 151, and the first side plate 153 is rotatably connected to the second end cover 152. Furthermore, the first end cover 151 and the second end cover 152 are spaced apart from each other, the second end cover 152 is arranged below the first end cover 151, and the second end cover 152 is detachably mounted on the lower end surface inside the detection box 130. By fixing the first end cover 151 and the first side plate 153 and rotatably connecting the first side plate 153 and the second end cover 152, it is ensured that the position of the first side plate 153 contacting the water flow inside the water pipe 190 can be changed. The ultrasonic sensor 160 is mounted on the second end cover 152, and the first side plate 153 is made of an elastic deformable material. When gas is supplied to the interior of the protective tube 150, the gas pressure inside the protective tube 150 increases, and the first side plate 153 of the protective tube 150 is deformed, thereby realizing the blocking of the first detection port 120 by the first side plate 153. Furthermore, when the first side plate 153 of the protective tube 150 blocks the first detection port 120, the flow of water inside the water pipe 190 will impact the first side plate 153. After the ultrasonic sensor 160 has been running for a period of time, the position where the first side plate 153 of the protective tube 150 contacts water is easily damaged. By rotating the first end cover 151 of the protective tube 150, the position where the first side plate 153 of the protective tube 150 contacts water is changed, thereby extending the life of the protective tube 150 and reducing the frequency of maintenance.

[0039] In one embodiment, the side wall of the detection box 130 is provided with an auxiliary detection port 170 connecting the detection cavity and the installation cavity 111. The size of the auxiliary detection port 170 is the same as the size of the second detection port 140. In the circumferential direction of the detection box 130, the auxiliary detection port 170 and the second detection port 140 are evenly distributed in the circumferential direction of the detection box 130. The detection box 130 is rotatably set in the installation cavity 111. When the detection box 130 rotates, the positions of the auxiliary detection port 170 and the second detection port 140 can be interchanged. An auxiliary cylinder 180 is arranged in the detection chamber. The auxiliary cylinder 180 is arranged close to the auxiliary detection port 170. An ultrasonic sensor 160 is arranged inside the auxiliary cylinder 180. The peripheral side wall of the auxiliary cylinder 180 can be deformed. The external contour of the auxiliary cylinder 180 is the same as the external contour of the protective cylinder 150. After the detection box 130 rotates a preset angle, the auxiliary detection port 170 is transformed to the original position of the second detection port 140. At this time, the auxiliary detection port 170 and the first detection port 120 are in a corresponding state. The auxiliary cylinder 180 can take over the function of the protective cylinder 150. After the peripheral side wall of the auxiliary cylinder 180 is deformed, the first detection port 120 is blocked through the auxiliary detection port 170, and the ultrasonic sensor 160 inside the auxiliary cylinder 180 will continue to perform the function of detecting water flow. Furthermore, when the ultrasonic sensor 160 inside the protective tube 150 fails, the ultrasonic sensor 160 inside the protective tube 150 cannot complete the function of detecting the water flow rate. At this time, the detection box 130 is driven to rotate at a preset angle, the auxiliary detection port 170 on the detection box 130 corresponds to the first detection port 120, and the auxiliary tube 180 inside the detection box 130 replaces the protective tube 150, thereby reducing the maintenance time and improving the accuracy of water flow detection. Furthermore, when the ultrasonic sensor 160 inside the auxiliary tube 180 is working, the ultrasonic sensor 160 inside the protective tube 150 is repaired.

[0040] In one embodiment, the auxiliary tube 180 includes a third end cap, a fourth end cap and a second side plate, the fourth end cap is fixedly connected to the inner wall of the detection box 130, the second side plate is fixedly connected to the third end cap, and the second side plate is rotatably connected to the fourth end cap. Further, the third end cap and the fourth end cap are arranged at intervals up and down, the fourth end cap is arranged below the third end cap, and the fourth end cap is detachably mounted on the lower end surface inside the detection box 130. By fixing the third end cap and the second side plate, and rotatably connecting the second side plate and the fourth end cap, it is ensured that the position of the second side plate contacting the water flow inside the water pipe 190 can be changed. The ultrasonic sensor 160 is mounted on the fourth end cap, the second side plate is made of elastic deformable material, and the second side plate is made of the same material as the first side plate 153. When gas is supplied to the inside of the auxiliary tube 180, the air pressure inside the auxiliary tube 180 increases, and the second side plate of the auxiliary tube 180 is deformed, thereby realizing the blocking of the first detection port 120 by the second side plate. Furthermore, when the second side plate of the auxiliary cylinder 180 blocks the first detection port 120, the flow of water inside the water pipe 190 will impact the second side plate. After the ultrasonic sensor 160 has been running for a period of time, the position where the second side plate of the auxiliary cylinder 180 contacts the water is prone to damage. By rotating the third end cover of the auxiliary cylinder 180, the position where the second side plate of the auxiliary cylinder 180 contacts the water is changed, thereby extending the life of the auxiliary cylinder 180 and reducing the frequency of maintenance.

[0041] In one embodiment, a regulating pump 210 is provided in the detection chamber, and the regulating pump 210 is used to adjust the air pressure inside the protective tube 150 and the auxiliary tube 180. Further, the regulating pump 210 is fixedly provided in the detection chamber, and the regulating pump 210 has an air inlet pipe and an air outlet pipe. The air inlet pipe of the regulating pump 210 runs through the detection box 130 and the installation box 110, so that the regulating pump 210 can extract gas from the external environment; the regulating pump 210 has two air outlet pipes, one of which is connected to the protective tube 150, and the other is connected to the auxiliary tube 180. When the regulating pump 210 pumps air outward, the regulating pump 210 can select one of the air outlet pipes to discharge air, so as to ensure that the regulating pump 210 supplies gas to the inside of the protective tube 150 or the auxiliary tube 180.

[0042] In one embodiment, a blocking plate 220 is disposed on the water pipe 190 , and the blocking plate 220 is used to block the first detection port 120 when the detection box 130 rotates. Specifically, a mounting shaft is fixedly provided on the blocking plate 220, and the mounting shaft is rotatably connected to the outer wall of the water pipe 190. By setting the mounting shaft, the blocking plate 220 can block the first detection port 120 or unblock the first detection port 120. When the volume of the protective tube 150 has not increased to a certain extent, the blocking plate 220 is in a state of blocking the first detection port 120. As the volume of the protective tube 150 increases, the first side plate 153 of the protective tube 150 squeezes the blocking plate 220. When the squeezing force of the first side plate 153 of the protective tube 150 on the blocking plate 220 reaches a certain extent, the staff drives the blocking plate 220 to unblock the first detection port 120. During the process of the blocking plate 220 unblocking the first detection port 120, the first side plate 153 of the protective tube 150 can quickly block the first detection port 120.

[0043] Furthermore, when the detection box 130 needs to be rotated, in order to prevent the water inside the water pipe 190 from discharging the water pipe 190 through the first detection port 120, the first detection port 120 is first blocked by the blocking plate 220. After the blocking plate 220 completely blocks the first detection port 120, the detection box 130 is rotated again. After the auxiliary detection port 170 and the first detection port 120 are aligned, the regulating pump 210 is first used to supply gas to the auxiliary cylinder 180. The second side plate of the auxiliary cylinder 180 squeezes the blocking plate 220. When the squeezing force of the second side plate of the auxiliary cylinder 180 on the blocking plate 220 reaches a certain level, the staff drives the blocking plate 220 to unblock the first detection port 120. In the process of the blocking plate 220 unblocking the first detection port 120, the second side plate of the auxiliary cylinder 180 can quickly block the first detection port 120.

[0044] In one embodiment, a limit member is provided in the installation box 110, and the limit member is used to limit the rotation of the detection box 130 in the installation cavity 111. By providing the limit member, when the positions of the first detection port 120 and the second detection port 140 correspond, or when the positions of the first detection port 120 and the auxiliary detection port 170 correspond, the detection box 130 is in a stable state, thereby preventing water leakage at the first detection port 120 due to shaking of the detection box 130.

[0045] In one embodiment, the limit member includes a limit ring 230 and a plurality of limit grooves, wherein the plurality of limit grooves are arranged on the side walls of the detection box 130, an eccentric shaft is rotatably arranged on the limit ring 230, the axis of the eccentric shaft is parallel to the axis of the limit ring 230, the eccentric shaft is fixedly connected to the inner wall of the installation box 110, the limit ring 230 cannot actively rotate in the detection box 130, a limit block 240 is arranged on the limit ring 230, and the limit block 240 can enter the limit groove. Specifically, when the limit block 240 on the limit ring 230 enters the limit groove, the detection box 130 cannot rotate in the installation cavity 111. When the detection box 130 needs to be rotated, the limit ring 230 is first driven to rotate so that the limit block 240 on the limit ring 230 is disengaged from the limit groove. After the limit block 240 on the limit ring 230 is disengaged from the limit groove, the detection box 130 can rotate in the installation cavity 111. Furthermore, a rotating handle is provided on the limiting ring 230, and a staff member can drive the limiting ring 230 to rotate around the eccentric shaft by rotating the handle.

[0046] In one embodiment, a sealing ring 250 is provided at the first detection port 120, and the sealing ring 250 is made of rubber. When the first side plate 153 or the second side plate is deformed to block the first detection port 120, the first side plate 153 or the second side plate can be closely abutted against the sealing ring 250, thereby reducing the probability of water inside the water pipe 190 leaking from the first detection port 120. Furthermore, the first side plate 153 and the second side plate are both made of elastic rubber.

[0047] In one embodiment, a buffer airbag 260 is provided in the detection cavity, a guide tube 270 is provided on the installation box 110, the end of the buffer airbag 260 blocks one end of the guide tube 270, and the other end of the guide tube 270 is always connected to the inside of the water pipe 190. Specifically, there is always water in the guide tube 270, and when the water pressure in the water pipe 190 fluctuates, the water pressure in the guide tube 270 changes synchronously, and the water in the guide tube 270 can squeeze the buffer airbag 260. When the buffer airbag 260 is deformed, the buffer airbag 260 can consume the energy of the water pressure in the water pipe 190.

[0048] In one embodiment, two detection boxes 130 are arranged in each installation cavity 111. In the same installation cavity 111, the two detection boxes 130 are arranged at intervals in the extension direction of the water pipe 190. A protective tube 150 and an auxiliary tube 180 are arranged inside each detection box 130. The four detection boxes 130 in the two installation cavities 111 are arranged in pairs, and the ultrasonic signals emitted by the ultrasonic sensor 160 are at an angle to the axial direction of the pipeline. By arranging two detection boxes 130 in each installation cavity 111, the water flow in the same section of the water pipe 190 is detected twice, thereby improving the accuracy of water flow detection.

[0049] Furthermore, the ultrasonic sensors 160 that are in the same installation cavity 111 but in different detection boxes 130 can be interchanged. In the direction of water flow, if the water flow affects the ultrasonic sensor 160 inside the protective tube 150 or the auxiliary tube 180, the ultrasonic sensors 160 that are inside different detection boxes 130 in the same installation cavity 111 can be interchanged so that the degree of damage of the four ultrasonic sensors 160 in the same installation cavity 111 is roughly the same. When one of the ultrasonic sensors 160 is damaged, the other ultrasonic sensors 160 can be replaced together, thereby reducing the frequency of maintenance of the ultrasonic sensors 160.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultrasonic water meter with a water leakage detection function, characterized in that: include: An installation box is sleeved on the outside of the water pipe, the interior of the installation box is hollow, and the water pipe can separate the interior of the installation box into two relatively isolated installation chambers; the water pipe is provided with two first detection ports that communicate with the interior of the water pipe and the two installation chambers, and in the water flow direction inside the water pipe, there is a preset distance between the two first detection ports; There are two detection boxes, each detection box is arranged in an installation cavity; the detection box has a detection cavity inside, and a second detection port connecting the detection cavity and the installation cavity is arranged on the side wall of the detection box, and the second detection port is arranged corresponding to the first detection port; The protective tube is arranged in the detection cavity, and the peripheral side wall of the protective tube can be deformed. When the peripheral side wall of the protective tube is deformed, the first detection port can be blocked through the second detection port; an ultrasonic sensor is arranged inside the protective tube.

2. The ultrasonic water meter with water leakage detection function according to claim 1, characterized in that: The protective tube includes a first end cover, a second end cover and a first side plate. The second end cover is fixedly connected to the inner wall of the detection box, the first side plate is fixedly connected to the first end cover, and the first side plate is rotatably connected to the second end cover. The ultrasonic sensor is installed on the second end cover. The first side plate is made of elastic deformable material.

3. The ultrasonic water meter with water leakage detection function according to claim 2, characterized in that: An auxiliary detection port connecting the detection cavity and the installation cavity is provided on the side wall of the detection box. The detection box is rotatably arranged in the installation cavity. An auxiliary cylinder is arranged in the detection cavity. An ultrasonic sensor is arranged inside the auxiliary cylinder. The side wall around the auxiliary cylinder can be deformed. When there is a fault in the ultrasonic sensor inside the protective cylinder, the detection box rotates by a preset angle, and the auxiliary detection port on the detection box can correspond to the first detection port.

4. The ultrasonic water meter with water leakage detection function according to claim 3, characterized in that: The auxiliary tube includes a third end cover, a fourth end cover and a second side plate, the fourth end cover is fixedly connected to the inner wall of the detection box, the second side plate is fixedly connected to the third end cover, and the second side plate is rotatably connected to the fourth end cover; the ultrasonic sensor is installed on the fourth end cover; the second side plate is made of elastic deformable material.

5. The ultrasonic water meter with water leakage detection function according to claim 4, characterized in that: A regulating pump is arranged in the detection chamber, and the regulating pump is used to adjust the air pressure inside the protective tube and the auxiliary tube.

6. The ultrasonic water meter with water leakage detection function according to claim 4, characterized in that: A blocking plate is arranged on the water pipe, and the blocking plate is used to block the first detection port when the detection box rotates.

7. The ultrasonic water meter with water leakage detection function according to claim 4, characterized in that: A limit piece is arranged in the installation box, and the limit piece is used to limit the rotation of the detection box in the installation cavity.

8. The ultrasonic water meter with water leakage detection function according to claim 7, characterized in that: The limiting member includes a limiting ring and a plurality of limiting grooves, wherein the plurality of limiting grooves are arranged on the side walls of the detection box, an eccentric shaft is rotatably arranged on the limiting ring, the axis of the eccentric shaft is parallel to the axis of the limiting ring, and the eccentric shaft is fixedly connected to the inner wall of the installation box; a limiting block is arranged on the limiting ring, and the limiting block can enter the limiting groove.

9. The ultrasonic water meter with water leakage detection function according to claim 1, characterized in that: A sealing ring is arranged at the first detection port.

10. The ultrasonic water meter with water leakage detection function according to claim 1, characterized in that: A buffer air bag is arranged in the detection cavity, a guide pipe is arranged on the installation box, one end of the guide pipe abuts against the buffer air bag, and the guide pipe is always connected with the inside of the water pipe.

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