High-reliability intelligent pressure sensor

Abstract

The invention relates to the technical field of intelligent pressure sensors, and discloses a high-reliability intelligent pressure sensor, which comprises a water pipe joint connected between two sections of pipelines, a detection pipe head arranged on the side wall of the water pipe joint, and a sensor shell arranged on the detection pipe head, a protection unit is installed between the outer wall of the water pipe connector and the sensor shell. The protection unit comprises a trigger part arranged on the outer wall of the water pipe connector. By arranging the protection unit, the intelligent pressure sensor can conduct real-time monitoring and feedback on the water pressure in a detected object water pipe under the normal condition, if the pressure in the sewer pipe exceeds the numerical value borne by the strain gauge under the special condition, the trigger component can close the input connector through the closing component, and therefore the input connector can be closed. Therefore, the pressure in the water pipe does not continue to act on the strain gauges, and the strain gauges are protected.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent pressure sensors, and particularly to a highly reliable intelligent pressure sensor. Background Art

[0002] Intelligent pressure sensors mainly monitor and analyze the pressure changes in the water pipe system in real time to help ensure the safe operation of the water pipe system. Such sensors can accurately measure the pressure value inside the water pipe and timely detect potential faults and abnormal conditions, such as water pipe rupture, blockage, or leakage. Thus, they provide efficient management and maintenance means for water service companies or households. The basic principle of intelligent pressure sensors is usually the strain gauge principle. Utilizing the pressure in the water pipe, the strain gauge undergoes a small deformation. Through the change in its resistance after deformation, this change is converted into an electrical signal, and then the pressure inside the water pipe is measured.

[0003] Although existing intelligent pressure sensors can monitor the pressure of water pipes in real time, there are still the following problems: Since intelligent pressure sensors use the deformation of strain gauges to monitor the pressure inside water pipes in real time, but each strain gauge can withstand a limited pressure. If the pressure inside the water pipe exceeds the pressure that the strain gauge can withstand, it may cause permanent deformation and damage to the strain gauge material. Long-term or multiple high loads may reduce the sensitivity of the strain gauge or cause its failure, making it unable to be used normally subsequently. Therefore, an intelligent pressure sensor needs to be designed. Once the pressure in the water pipe exceeds the value that the strain gauge can withstand, the input joint is automatically closed to protect the internal strain gauge, and at the same time, an alarm sounds to remind the staff. Summary of the Invention

[0004] In view of the problem in the existing technology that if the pressure inside the water pipe becomes too high due to special reasons and exceeds the value that the strain gauge in the intelligent pressure sensor can withstand, the input joint will be automatically closed to prevent permanent deformation of the strain gauge under load and affect subsequent use, a highly reliable intelligent pressure sensor is proposed.

[0005] The present application provides a highly reliable intelligent pressure sensor, and its purpose is: By setting a protection unit, the intelligent pressure sensor in the present invention can monitor and feedback the water pressure inside the water pipe of the detection object in normal circumstances. If the pressure inside the water pipe exceeds the value that the strain gauge can withstand in special circumstances, the trigger component can close the input joint through the closing component, so that the pressure in the water pipe will not continue to act on the strain gauge to protect it. At the same time, the alarm will give an alarm to remind the staff. Also, when the pressure inside the water pipe drops to the normal range, the input joint will automatically open, enabling the intelligent pressure sensor to continue normal detection.

[0006] The technical solution of the present invention is as follows: A highly reliable intelligent pressure sensor for real-time detection of the water flow pressure in a pipeline, including a water pipe joint for connecting between two sections of pipelines, a detection pipe head arranged on the side wall of the water pipe joint, and a sensor housing arranged on the detection pipe head. A protection unit is installed between the outer wall of the water pipe joint and the sensor housing. The protection unit includes a triggering component arranged on the outer wall of the water pipe joint;

[0007] The triggering component includes an arc-shaped triggering box arranged on the outer wall of the water pipe joint, sliding boxes arranged at the upper ends of both sides of the arc-shaped triggering box, trigger plates with adjustable mass arranged on the inner walls of the sliding boxes, communicating square pipes respectively arranged at the upper ends of the sliding boxes, pressure-changing boxes respectively arranged on the side walls of the two communicating square pipes, lower limit blocks and upper limit blocks arranged on both sides inside the sliding boxes, upper communication holes opened on the inner wall of the water pipe joint, and lower communication holes arranged on the inner wall of the arc-shaped triggering box;

[0008] The water pipe joint and the arc-shaped triggering box are connected through the upper communication hole and the lower communication hole. Both trigger plates are located between the corresponding lower limit blocks and upper limit blocks. The inner area of the arc-shaped triggering box below the trigger plate is a pressure chamber, the area between the lower limit block and the upper limit block is a sliding chamber, the inner area of the arc-shaped triggering box above the upper limit block is an air chamber, and a motion component is installed inside the pressure-changing box.

[0009] Further, the motion component includes movable plates respectively arranged on the inner walls of the two pressure-changing boxes, connecting blocks one respectively arranged on the side walls of the two movable plates, connecting blocks two respectively arranged on the upper ends of the two trigger plates. A reset rope is installed between the corresponding connecting blocks one and connecting blocks two. Synchronous plates are respectively arranged on the side walls of the two movable plates, and rack plates are respectively arranged on the side walls of the synchronous plates.

[0010] Further, the protection unit further includes a closing component arranged inside the sensor housing. The closing component includes an input joint arranged at the lower end inside the sensor housing, an input pipe arranged inside the input joint, and a changing component is installed on the input pipe.

[0011] Further, the changing component includes a connecting square block arranged between the input pipes, a communication groove opened on the connecting square block, a changing column arranged inside the communication groove, driven gears arranged on both sides of the changing column. The two driven gears are respectively meshed with the corresponding rack plates, and a communication hole is opened on the changing column.

[0012] Further, a metal thin sheet is installed on the inner wall of the sensor housing. A strain gauge is fixedly installed at the upper end of the metal thin sheet. The area between the metal thin sheet and the input pipe is a detection chamber. The upper end of the input pipe is communicated with the detection chamber, and the lower end of the input pipe is communicated with the inside of the water pipe joint.

[0013] Furthermore, an output connector is fixedly installed on the upper end of the sensor housing, and the output connector is electrically connected to the strain gauge. An alarm is provided on the upper end of the output connector, and the output connector is electrically connected to the alarm. When the signal value output by the output connector is 0, the alarm sounds an alarm.

[0014] Furthermore, flanges are fixedly mounted on both end side walls of the water pipe joint, and the flanges are used to quickly connect the water pipe joint between two sections of pipelines.

[0015] Beneficial effects of the present invention:

[0016] 1. By setting a trigger component and reasonably setting the mass of the trigger plate according to the material of the strain gauge, if the pressure inside the water pipe is equal to the bearing value of the strain gauge inside the sensor, the gravity of the trigger plate is the same as the water pressure, and the trigger plate is in a balanced state. If the pressure inside the water pipe increases, it will drive the trigger plate to slide upward and compress the air inside the air cavity, causing the movable plate inside the transformer box to slide horizontally, thereby driving the rack plate to slide horizontally, triggering the trigger component of the present invention and protecting the sensor. Through reasonable design, the present invention can achieve automatic protection of the sensor with a simple structure, effectively prolonging the service life of the smart sensor and reducing maintenance costs during the detection operation.

[0017] 2. By setting a closing component, once the trigger component is triggered, the closing component automatically closes the input pipe in the input connector through the changing column, so that the water flow in the water pipe directly contacts the changing column instead of the strain gauge. The changing column effectively isolates the water flow and the strain gauge, protecting the strain gauge and preventing the strain gauge from being permanently deformed due to high pressure, which affects subsequent use. When the data transmitted by the strain gauge is 0, the alarm will sound an alarm to remind the staff and take appropriate measures. While achieving monitoring, it can also protect the sensor.

[0018] 3. By setting a trigger plate that can change mass, the staff can flexibly change the pressure value required to trigger the trigger component, effectively improving the overall flexibility of the device. At the same time, by setting a reset rope, once the pressure inside the water pipe returns to the normal value range of the strain gauge, the reset rope can drive the closing component to automatically reset and continue to monitor the pressure inside the water pipe. When the pressure inside the water pipe exceeds the tolerance value, the input pipe of the pressure sensor is closed. When the pressure inside the water pipe decreases, the input pipe is automatically opened for monitoring. There is no need for staff to operate it throughout the process, which effectively improves the flexibility and applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention from a first viewing angle;

[0020] Figure 2 Schematic diagram of the internal structure of the protection unit of the present invention;

[0021] Figure 3 Schematic diagram of the internal structure of the arc trigger box of the present invention;

[0022] Figure 4 Of the present invention Figure 3 Enlarged structure diagram at position A in;

[0023] Figure 5 Schematic diagram of the internal structure of the sensor housing of the present invention;

[0024] Figure 6 Schematic diagram of the installation structure of the sensor housing of the present invention;

[0025] Figure 7 Schematic diagram of the structure of the closing component of the present invention;

[0026] Figure 8 Of the present invention Figure 7 Enlarged structure diagram at position B in;

[0027] Figure 9 Schematic diagram of the installation structure of the variable column of the present invention;

[0028] Figure 10 Schematic diagram of the exploded structure of the connection block of the present invention.

[0029] In the figure:

[0030] 1, water pipe joint; 2, detection pipe head; 3, sensor housing; 4, arc trigger box; 5, sliding box; 6, trigger plate; 7, connecting square pipe; 8, transformer box; 9, lower limit block; 10, upper limit block; 11, upper connecting hole; 12, lower connecting hole; 13, pressure chamber; 14, sliding chamber; 15, air chamber; 16, movable plate; 17, connecting block one; 18, connecting block two; 19, reset rope; 20, synchronous plate; 21, rack plate; 22, input joint; 23, input pipe; 24, connecting block; 25, connecting groove; 26, variable column; 27, driven gear; 28, metal sheet; 29, strain gauge; 30, detection chamber; 31, output joint; 32, flange; 33, water delivery hole. Detailed implementation manners

[0031] To make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given in conjunction with the accompanying drawings of the specification.

[0032] Example 1, refer to Figures 1 - 4, which is the first embodiment of the present invention, provides a highly reliable intelligent pressure sensor for real-time detection of the water flow pressure in a pipeline. It includes a water pipe joint 1 connected between two sections of pipelines, a detection pipe head 2 fixedly installed on the side wall of the water pipe joint 1, a sensor housing 3 fixedly installed on the detection pipe head 2, and a protection unit installed between the outer wall of the water pipe joint 1 and the sensor housing 3. The protection unit includes a triggering component installed on the outer wall of the water pipe joint 1.

[0033] The triggering component includes an arc-shaped triggering box 4 fixedly installed on the outer wall of the water pipe joint 1, sliding boxes 5 fixedly installed at the upper ends of both sides of the arc-shaped triggering box 4, trigger plates 6 with adjustable mass hermetically and slidably installed on the inner walls of the sliding boxes 5, communicating square pipes 7 respectively fixedly installed at the upper ends of the two sliding boxes 5, pressure-changing boxes 8 respectively fixedly installed on the side walls of the two communicating square pipes 7, lower limit blocks 9 and upper limit blocks 10 fixedly installed on both sides inside the sliding boxes 5, upper communication holes 11 opened on the inner wall of the water pipe joint 1, and lower communication holes 12 opened on the inner wall of the arc-shaped triggering box 4. Flange plates 32 are fixedly installed on the side walls at both ends of the water pipe joint 1, and the flange plates 32 are used to quickly connect the water pipe joint 1 between two sections of pipelines.

[0034] The water pipe joint 1 and the arc-shaped triggering box 4 are connected through the upper communication hole 11 and the lower communication hole 12. Both trigger plates 6 are located between the corresponding lower limit blocks 9 and upper limit blocks 10. The inner area of the arc-shaped triggering box 4 below the trigger plate 6 is a pressure chamber 13, the area between the lower limit block 9 and the upper limit block 10 is a sliding chamber 14, the inner area of the arc-shaped triggering box 4 above the upper limit block 10 is an air chamber 15, and a motion component is installed inside the pressure-changing box 8.

[0035] A metal thin sheet 28 is installed on the inner wall of the sensor housing 3. A strain gauge 29 is fixedly installed at the upper end of the metal thin sheet 28. The area between the metal thin sheet 28 and the input pipe 23 is a detection chamber 30. The upper end of the input pipe 23 is connected to the detection chamber 30, and the lower end of the input pipe 23 is connected to the inside of the water pipe joint 1.

[0036] The motion component includes movable plates 16 respectively arranged on the inner walls of the two pressure-changing boxes 8, connecting blocks one 17 respectively fixedly installed on the side walls of the two movable plates 16, connecting blocks two 18 respectively fixedly installed on the upper ends of the two trigger plates 6, a reset rope 19 fixedly installed between the corresponding connecting blocks one 17 and connecting blocks two 18, synchronizing plates 20 respectively fixedly installed on the side walls of the two movable plates 16, and rack plates 21 respectively fixedly installed on the side walls of the synchronizing plates 20.

[0037] Specifically, the working principle of the intelligent pressure sensor is as follows: By connecting the input pipe 23 in the sensor to the inside of the water pipe, the water flow inside the water pipe flows into the pressure sensor. The pressure of the water flow directly acts on the metal sheet 28, causing the metal sheet 28 to deform when it is subjected to force. As a result, the strain gauge 29 at the upper end is synchronously deformed. After the strain gauge 29 is deformed, its own length changes, resulting in an increase in its own resistance. When the voltage applied to the strain gauge 29 remains unchanged and the resistance of the strain gauge 29 increases, the current passing through it will decrease. By presenting the current inside the strain gauge 29 in digital form, the pressure in the water flow can be indirectly expressed, and thus the pressure of the water flow in the water pipe can be directly judged by observing the digital value.

[0038] However, the intelligent pressure sensor monitors by means of the deformation of the strain gauge 29. However, no matter what material the strain gauge 29 is made of, it can only deform to a certain extent. If the strain of the strain gauge 29 caused by a large pressure exceeds its maximum bearing value, the strain gauge 29 will be permanently deformed and unable to recover, resulting in damage or malfunction of the pressure sensor. Therefore, by designing a trigger component, when the pressure is about to reach the maximum bearing value of the strain gauge 29, the trigger component triggers to close the input pipe 23, so that the pressure of the water flow in the water pipe cannot directly act on the strain gauge 29, thereby protecting the strain gauge 29 inside the pressure sensor.

[0039] The function of the trigger component is to be in contact with the water flow inside the water pipe at all times. Once the water flow pressure inside the water pipe exceeds the bearing range of the strain gauge 29 in the intelligent pressure sensor, the trigger plate 6 in the trigger component can move under the action of the pressure, and during the movement, it cooperates with other structures of the trigger component to protect the internal structure of the intelligent pressure sensor.

[0040] The working principle of the trigger component is as follows: Set the mass of the trigger plate 6 as X, and the maximum pressure that the strain gauge 29 can bear as Y, where Y is slightly greater than X. By slidingly installing the trigger plate 6 and setting a pressure chamber 13 at the lower end of the trigger plate ⑥, when the pressure in the water pipe increases to X, the water flow pressure in the water pipe is equal to the weight of the trigger plate 6. At this time, the trigger plate 6 is in a balanced state. When the pressure in the water pipe continues to increase and slowly equals Y, the upward pressure received by the trigger plate 6 is greater than its own gravity, causing the trigger plate 6 to slide upward under the action of the force. During the upward sliding process, by compressing the volume in the air chamber 15, the pressure in the air chamber 15 increases, driving the corresponding movable plate 16 to move synchronously, and then driving the corresponding rack plate 21 to move synchronously. When the water pipe pressure approaches Y, the rack plate 21 moves to the maximum distance. The rack plate 21 that has moved to the maximum distance closes the input pipe 23 of the pressure sensor through the protection unit, preventing the water flow with a large pressure from directly acting on the strain gauge 29 and causing damage to the strain gauge 29.

[0041] Similarly, when the pressure inside the water pipe gradually decreases, the trigger plate 6 can slide downward and reset under the action of gravity. At the same time, the movable plate 16 is synchronously reset by the reset rope 19. After resetting, the input pipe 23 is in an open state, and the intelligent pressure sensor can continue to normally monitor the water flow inside the water pipe in real time.

[0042] Embodiment 2, refer to Figures 5 - 10 , which is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the protection unit further includes a closing component installed inside the sensor housing 3. The closing component includes an input joint 22 fixedly installed at the lower end inside the sensor housing 3, an input pipe 23 fixedly installed inside the input joint 22, and a changing component installed on the input pipe 23. The changing component includes a connecting square 24 fixedly installed between the input pipes 23, a communication groove 25 opened on the connecting square 24, a changing column 26 rotatably installed inside the communication groove 25, driven gears 27 fixedly installed on both sides of the changing column 26, two driven gears 27 respectively meshing with the corresponding rack plates 21, and a water delivery hole 33 opened on the changing column 26.

[0043] Specifically, the closing component is used to cooperate with the triggering component. When the triggering component is triggered, the two rack plates 21 will slide in the horizontal direction, and during the sliding process, the corresponding driven gears 27 are synchronously rotated. One of the two rack plates 21 meshes with the lower end of the corresponding driven gear 27, and the other meshes with the upper end of the corresponding driven gear 27. When the two rack plates 21 move synchronously in opposite directions, the changing column 26 will be driven to rotate in the same direction. There is a water delivery hole 33 on the changing column 26. Under normal conditions, the input pipe 23 cooperates with the water delivery hole 33 to make the detection cavity 30 communicate with the inside of the water pipe. When the rack plate 21 drives the changing column 26 to rotate, the water delivery hole 33 rotates 90°, making the input pipe 23 in a closed state, thereby closing the input joint 22 of the intelligent pressure sensor and protecting the internal strain gauge 29.

[0044] During use, when the water pressure in the water pipe is less than the maximum pressure that the strain gauge 29 can withstand, the water delivery hole 33 opened on the changing column 26 is used to connect the input pipe 23 with the inside of the water pipe, and the water flow inside the water pipe normally enters the detection cavity 30, and the pressure sensor monitors the water pressure inside the water pipe in real time; when the water pressure in the water pipe exceeds the maximum pressure that the strain gauge 29 can withstand, the triggering component is triggered to drive the two rack plates 21 to move along the horizontal direction. The rack plates 21 drive the corresponding driven gears 27 to rotate during the movement, and then drive the changing column 26 to rotate, so that the changing column 26 rotates 90°, blocking the input pipe 23. At this time, the water flow inside the water pipe cannot normally flow into the pressure sensor, and the internal strain gauge 29 is protected.

[0045] The remaining structure is the same as that of Embodiment 1.

[0046] Embodiment 3, referring to Figures 6 - 7 , is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that an output connector 31 is fixedly installed at the upper end of the sensor housing 3. The output connector 31 is electrically connected to the strain gauge 29. An alarm (not shown in the figure) is provided at the upper end of the output connector 31. The output connector 31 is electrically connected to the alarm. When the signal value output by the output connector 31 is 0, the alarm sounds.

[0047] Specifically, the function of the alarm is as follows: When the internal pressure of the water pipe is too high, causing the input pipe 23 in the pressure sensor to close, since the pressure sensor is closed and cannot monitor the pressure in real time, the alarm needs to sound to remind the staff that the internal pressure of the water pipe is too high and take corresponding measures in time. When the signal value output by the output connector 31 is 0, an alarm is issued. The reason is that there is always pressure in the water flow inside the water pipe. Once the pressure is 0, there are only two cases: the pressure sensor is closed or damaged. At this time, when the alarm sounds, the staff can take measures in time.

[0048] The remaining structure is the same as that of Embodiment 2.

[0049] Combining Embodiments 1 - 3, the working principle of the present invention is as follows: In the normal state, both ends of the water pipe joint 1 are connected between the water pipes to be detected. After installation, the water flow in the water pipes to be detected will flow into the water pipe joint 1 and then into the detection cavity 30 through the detection nozzle 2 and the input pipe 23, enabling the strain gauge 29 to monitor the pressure.

[0050] When the water pressure in the water pipe is exactly equal to the weight of the trigger plate 6, the water flow pressure in the water pipe is equal to the weight of the trigger plate 6. At this time, the trigger plate 6 is in a balanced state. When the pressure in the water pipe continues to increase and the value slowly approaches the maximum pressure that the strain gauge 29 can withstand, the upward pressure on the trigger plate 6 is greater than its own gravity, causing the trigger plate 6 to slide upward under the action of the force. During the upward sliding process, the volume of the air chamber 15 is compressed, increasing the pressure in the air chamber 15 and driving the corresponding movable plate 16 to move synchronously, and then driving the corresponding rack plate 21 to move synchronously. When the water pipe pressure is about to be equal to the maximum pressure that the strain gauge 29 can withstand, the rack plate 21 moves to the maximum distance.

[0051] The two rack plates 21 move along the horizontal direction. During the movement, the rack plate 21 drives the corresponding driven gear 27 to rotate, and then drives the change column 26 to rotate, causing the change column 26 to rotate 90°, blocking the input pipe 23. At this time, the water flow inside the water pipe cannot flow into the pressure sensor normally, protecting the strain gauge 29 inside.

[0052] When the input pipe 23 in the pressure sensor is closed, the pressure sensor cannot monitor the pressure in real time. An alarm is required to alert the staff that the internal pressure of the water pipe is too high and corresponding measures should be taken in a timely manner. Therefore, an alarm is issued through the alarm device.

[0053] When the internal water flow pressure of the water pipe gradually decreases, the water pressure drops, and the trigger plate 6 slides downward under the action of gravity. During the sliding process, the movable plate 16 and the rack plate 21 are synchronously reset through the reset rope 19. When the rack plate 21 is reset, it drives the variable column 26 to rotate in the reverse direction and reset, so that the input pipe 23 is reopened, and the pressure sensor continues to monitor the pressure of the water flow in the water pipe.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A highly reliable intelligent pressure sensor for real-time detection of water pressure in a pipeline, comprising a pipe joint for connecting between two pipe sections, a detection head disposed on the side wall of the pipe joint, and a sensor housing disposed on the detection head, characterized in that: A protection unit is installed between the outer wall of the water pipe joint and the sensor housing, and the protection unit includes a trigger component arranged on the outer wall of the water pipe joint; The trigger component includes an arc-shaped trigger box provided on the outer wall of the water pipe joint, sliding boxes provided on the upper ends of both sides of the arc-shaped trigger box, a mass-adjustable trigger plate provided on the inner wall of the sliding box, connecting square tubes provided on the upper ends of the sliding boxes, transformer boxes provided on the side walls of the two connecting square tubes, lower and upper limit blocks provided on both sides of the sliding box, an upper connecting hole provided on the inner wall of the water pipe joint, and a lower connecting hole provided on the inner wall of the arc-shaped trigger box. The water pipe joint is connected to the arc-shaped trigger box through an upper connecting hole and a lower connecting hole. The two trigger plates are located between the corresponding lower limit block and upper limit block. The internal area of the arc-shaped trigger box below the trigger plate is a pressure chamber, the area between the lower limit block and the upper limit block is a sliding chamber, and the internal area of the arc-shaped trigger box above the upper limit block is an air chamber. A motion component is installed inside the transformer box.

2. The high-reliability intelligent pressure sensor according to claim 1, characterized in that: The motion assembly includes movable plates respectively arranged on the inner walls of the two transformer boxes, connecting blocks 1 respectively arranged on the side walls of the two movable plates, connecting blocks 2 respectively arranged on the upper ends of the two trigger plates, a reset rope is installed between the corresponding connecting blocks 1 and 2, synchronous plates respectively arranged on the side walls of the two movable plates, and rack plates respectively arranged on the side walls of the synchronous plates.

3. The high-reliability intelligent pressure sensor according to claim 2, characterized in that: The protection unit further includes a closing component arranged in the sensor housing. The closing component includes an input connector arranged at the lower end of the sensor housing, an input pipe arranged inside the input connector, and a changing assembly installed on the input pipe.

4. The high-reliability intelligent pressure sensor according to claim 2, characterized in that: The changing assembly includes a connecting block arranged between the input pipes, a communicating groove opened on the connecting block, a changing column arranged inside the communicating groove, and driven gears arranged on both sides of the changing column, the two driven gears are respectively engaged with the corresponding rack plates, and a water delivery hole is opened on the changing column.

5. The high-reliability intelligent pressure sensor according to claim 3, characterized in that: A metal sheet is installed on the inner wall of the sensor housing, and a strain gauge is fixedly installed on the upper end of the metal sheet. The area between the metal sheet and the input pipe is the detection cavity. The upper end of the input pipe is connected to the detection cavity, and the lower end of the input pipe is connected to the inside of the water pipe joint.

6. The high-reliability intelligent pressure sensor according to claim 5, characterized in that: An output connector is fixedly installed on the upper end of the sensor housing, and the output connector is electrically connected to the strain gauge. An alarm is provided on the upper end of the output connector, and the output connector is electrically connected to the alarm. When the signal value output by the output connector is 0, the alarm sounds an alarm.

7. The high-reliability intelligent pressure sensor according to claim 1, characterized in that: Flanges are fixedly mounted on both end side walls of the water pipe joint, and the flanges are used to quickly connect the water pipe joint between two sections of pipelines.

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