Equipment and Method for Measuring the Elevation of Pipelines in a Large Well Chamber

Abstract

An equipment and method for measuring the elevation of pipelines in a large inspection chamber, including a sonar device, a lifting and diving balance device, a measuring device and a power device. By arranging the lifting and diving balance device, the measuring device and the power device inside or outside the cylindrical barrel of the sonar device, the pressure conduction hose is communicated with the pressure gauge inside the cylindrical barrel and the container outside the cylindrical barrel. The charging pipe, the exhaust pipe and the hose of the lifting and diving balance device are communicated with the cavity. The air jet hole of the power device is communicated with the air chamber. The steering mechanism is connected to the cylindrical barrel. The solenoid valves on the charging pipe, the exhaust pipe and the air jet hole are electrically connected to the controller. The power supply circuit, the air supply circuit and the control circuit are also electrically connected to the controller. The lifting and diving balance device drives the cylindrical barrel to dive or float, the power device drives the cylindrical barrel to move, the sonar device cooperates for detection and positioning, and the measuring device imports the measured values at different stages into the formula to calculate the pipeline elevation, which is applicable to the measurement of the pipeline elevation in the large inspection chamber during the pipe jacking construction, with accurate measurement, safety and reliability.

Description

Technical Field

[0001] The present invention belongs to the technical field of municipal engineering, and relates to a device and method for measuring the elevation of pipelines in large well chambers. Background Technique

[0002] Many drainage pipelines with large burial depths are constructed using the pipe jacking process. The pipe jacking construction requires the fabrication of large well chambers as working wells or receiving wells for pipe jacking operations. For some of these large well chambers, there is a device that does not have an inner well (small well chamber) built inside, and there is also a situation where the completion drawings are lost or the construction is not carried out according to the drawings, resulting in unknown pipeline elevations.

[0003] In the later stage, if partial renovation and repair are to be carried out on these pipelines, it is first necessary to measure the elevations of the pipelines on both sides of the pipeline to be renovated. If the elevation measurement is inaccurate, problems such as "reverse slope" and inappropriate elevations may occur. The conventional method for measuring existing pipelines is to use an RTK surveying instrument + L rod or ruler. This method is more applicable to measuring the pipeline elevation of conventional well chambers, but it is not applicable to the situation of large well chambers. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a device and method for measuring the elevation of pipelines in large well chambers. A lifting and diving balance device, a measuring device, and a power device are arranged inside or outside the cylindrical barrel of the sonar device. The pressure conduction hose is connected to the pressure gauge inside the cylindrical barrel and the container outside the cylindrical barrel. The inflatable pipe, exhaust pipe, and hose of the lifting and diving balance device are connected to the cavity. The air jet hole of the power device is connected to the air chamber. The steering mechanism is connected to the cylindrical barrel. The solenoid valves on the inflatable pipe, exhaust pipe, and air jet hole are electrically connected to the controller. The power supply circuit, air supply circuit, and control circuit are also electrically connected to the controller. The lifting and diving balance device drives the cylindrical barrel to dive or float, the power device drives the cylindrical barrel to move, the sonar device cooperates for detection and positioning, and the measuring device imports the measured values at different stages into a formula to calculate the pipeline elevation. It is applicable to measuring the pipeline elevation in large well chambers during pipe jacking construction, with accurate measurement, safety, and reliability.

[0005] To solve the above technical problem, the technical solution adopted by the present invention is: a device for measuring the elevation of pipelines in large well chambers, which includes a sonar device, a lifting and diving balance device, a measuring device, and a power device; at least two lifting and diving balance devices are symmetrically arranged on both sides inside the cylindrical barrel of the sonar device, the pressure gauge of the measuring device is located inside the cylindrical barrel, and the steering mechanism of the power device is connected to the cylindrical barrel; the pressure conduction hose that is connected to and extends outside the cylindrical barrel from the pressure gauge is connected to the container.

[0006] The sonar device includes a sonar detector connected to the central position inside the hollow cylindrical barrel; the sonar detector is electrically connected to the controller.

[0007] The lifting and diving balance device is located inside the cylindrical barrel and connected thereto, and is symmetrically arranged along the axis of the cylindrical barrel. The air charging pipe, the exhaust pipe and the hose communicate with the cavity and are led out of the cylindrical barrel; the hose extends into the cavity; the solenoid valves provided on the air charging pipe and the exhaust pipe are electrically connected to the controller.

[0008] A counterweight ball is provided at one end of the hose located inside the cavity, so that even when the cylinder rotates, the counterweight ball can contact the lower part of the cavity under the action of gravity.

[0009] The measuring device includes a rotatable joint connected to the water inlet end of the pressure gauge. Both ends of the pressure conduction hose are respectively connected to the rotatable joint and the container; the data line of the pressure gauge is tied to the pressure conduction hose together, and the value of the pressure gauge can be displayed on the screen of the central computer or at other positions convenient for ground operators to read.

[0010] The multiple air jet holes of the power device are symmetric with each other and communicate with the air chambers separated by partitions inside the cylindrical barrel. The steering mechanism is connected to the cylindrical barrel through a bracket and extends to the lower part of the cylindrical barrel.

[0011] The air jet holes communicate with the solenoid valves. The power supply circuit, the air supply circuit and the control circuit of the solenoid valves are led out of the cylindrical barrel and are electrically connected to the controller.

[0012] The steering mechanism includes a steering shaft and a steering rudder. The steering shaft is a right-angle steering shaft. One end is connected to the outer wall of the cylindrical barrel through a bracket. The connection between the steering shaft and the bracket allows the bracket to rotate around the axis of the cylinder. The bracket is rigidly connected to the cylindrical barrel, and the cylinder can rotate around its axis without restraint; the other end is connected to the steering rudder. The rudder blade of the steering rudder is located at the lower part of the cylindrical barrel. The power supply circuit and the control circuit of the steering rudder are electrically connected to the controller.

[0013] The elevation measurement method of the equipment for measuring the elevation of the pipeline in the large well chamber as described above includes the following steps:

[0014] S1. Inflation: Connect an air compressor to the air jet holes to inflate the air chambers, and stop inflation after the air pressure reaches the set pressure value;

[0015] S2. Water injection: Inject water into the container to fill the pressure conduction hose with water in the container, and the water pressure acts on the pressure gauge;

[0016] S3. Set a reference point: Refer to the materials to determine the inner diameter D of the pipeline whose elevation is to be measured, or measure at other positions upstream and downstream where it is easy to measure the pipeline diameter; near the wellhead of the large well chamber to be detected, that is, set a reference point above the ground and measure the elevation h1 of the reference point;

[0017] S4. Lowering. Close the upstream and downstream pumping stations, so that the water flow in the well chamber and pipeline is in a basically static state, and keep the liquid level in the large well chamber higher than the top of the pipeline; fix the container at a relatively high position above the ground, place the upper part of the cylindrical barrel of this equipment at the position flush with the reference point, read the pressure gauge reading P1, and record the liquid level h2 of the container; use the L-bar tool to place the cylindrical barrel of this equipment into the large well chamber; in this step, the hose is immersed in the water.

[0018] S5. Sinking. Open the solenoid valve on the exhaust pipe, and water enters the cavity along the hose. This equipment sinks smoothly. When it sinks to a certain depth, close the solenoid valve of the exhaust pipe, and this equipment stops sinking and is in a suspended state; at the same time, turn on the sonar detector to further determine the position of the pipeline nozzle in the well chamber.

[0019] S6. Moving. The controller controls the opening of the solenoid valve on the air jet hole and the steering of the steering rudder, so that the cylindrical barrel of this equipment enters the nozzle position in the pipeline to be measured; in this step, judge in combination with the direction of the hose, and pay attention to observing the change of the sonar image to ensure that the cylindrical barrel of this equipment enters the interior of the pipeline to be measured, but do not go too deep into the pipeline.

[0020] S7. Open the solenoid valve on the air charging pipe, and air enters the cavity from the air chamber to inflate the cavity. The air in the cavity compresses the water in the cavity to enter the hose from the water inlet and outlet holes of the counterweight ball and finally flow out of this equipment, so that the cylindrical barrel of this equipment floats up and clings to the top inside the pipe. Since the cylindrical barrel of this equipment can rotate freely, it will directly rotate to the highest position in the middle of the top inside the pipe, and read the pressure gauge reading P2; in this step, judge whether the cylindrical barrel of this equipment clings to the middle of the top inside the pipe through the sonar image. If it does not cling to the middle of the top inside the pipe, control the cylindrical barrel of this equipment to sink and float slightly until the main cylindrical barrel of this equipment clings to the middle of the top inside the pipe.

[0021] S8. Recording. Since the pressure conduction hose changes from the "bundled" or "coiled" state before use to the "stretched" state during use, and there may be a slight expansion of the pressure conduction hose after bearing a large pressure during the use of this equipment, the liquid level in the container may drop. Record the liquid level h3 of the container at this time.

[0022] S9. Calculation. Use the formula H = h1 - (P2 - P1) / ρg - D - (h2 - h3) to calculate the bottom elevation inside the pipe of this pipeline, where ρ is the density of the liquid in the pressure conduction hose and the container, and g is the acceleration of gravity.

[0023] The beneficial effects of the present invention are mainly reflected in:

[0024] The sonar device is located at the center of the cylindrical barrel, with stable center of gravity. During the diving or floating process of the cylindrical barrel, it detects the pipeline well chamber, and judges the specific position where the cylindrical barrel is located through the sonar image.

[0025] The cylindrical tube has a hollow structure. The cavity inside is connected to the air filling pipe, the exhaust pipe and the hose. When the cylindrical tube is placed in water, the hose is submerged in the water. After the exhaust pipe is opened, the gas in the cavity flows out, and the water outside the device enters the cavity through the hose under the action of gravity, causing the device to sink.

[0026] After the solenoid valve of the air filling pipe is opened, the high-pressure air in the air storage chamber enters the cavity, and the water in the cavity is discharged from the hose, so that the weight of the device decreases and it floats up.

[0027] The pressure conduction hose is led to above the ground; one end of the pressure conduction hose is connected to the rotary joint to prevent the air filling pipe and the pressure conduction hose from being entangled during the movement of the device.

[0028] Water is injected into the container to fill the pressure conduction hose with water in the container. The water pressure acts on the pressure gauge, and the pressure values are recorded at different stages of the device diving or floating up and imported into the formula to calculate the pipeline elevation, eliminating the need for personnel to dive for measurement, which is safe and reliable.

[0029] The air storage chamber is pre-inflated for energy storage in advance, and then the device moves by exhausting air through the air jet holes and controlling the steering of the steering rudder, and the device is positioned at the top of the pipeline in cooperation with the sonar image screen, which is beneficial to accurately measuring the pipeline elevation.

[0030] The solenoid valves on the sonar detector, the air filling pipe, the exhaust pipe and the air jet holes are electrically connected to the controller, and the power supply circuit, the air supply circuit and the control circuit are also electrically connected to the controller. The controller is located above the ground for easy operation. Description of the Drawings

[0031] The present invention will be further described below with reference to the drawings and embodiments:

[0032] Figure 1 It is a schematic structural diagram of the present invention.

[0033] Figure 2 It is a top view schematic diagram of the sonar of the present invention.

[0034] Figure 3 It is a schematic structural diagram inside the cylindrical tube of the present invention.

[0035] Figure 4 It is a state diagram when the present invention is in use.

[0036] In the figure: sonar device 1, cylindrical tube 11, sonar detector 12, lifting and diving balance device 2, cavity 21, air filling pipe 22, exhaust pipe 23, hose 24, counterweight ball 25, measuring device 3, pressure gauge 31, rotary joint 32, pressure conduction hose 33, container 34, power device 4, air jet hole 41, air storage chamber 42, steering mechanism 43. Detailed Embodiments

[0037] AsFigures 1 to 4 Among them, a device for measuring the elevation of pipelines in a large inspection chamber includes a sonar device 1, a lifting and diving balance device 2, a measuring device 3, and a power device 4; at least two lifting and diving balance devices 2 are symmetrically arranged on both sides inside the cylindrical barrel 11 of the sonar device 1, the pressure gauge 31 of the measuring device 3 is located inside the cylindrical barrel 11, and the steering mechanism 43 of the power device 4 is connected to the cylindrical barrel 11; the pressure conduction hose 33 that is connected to and extends outside the cylindrical barrel 11 of the pressure gauge 31 is communicated with a container 34. When in use, the lifting and diving balance device 2 drives the cylindrical barrel 11 to dive or float, the power device 4 drives the cylindrical barrel 11 to move, the sonar device 1 cooperates for detection and positioning, and the measuring device 3 imports the measured values at different stages into a formula to calculate the pipeline elevation, which is applicable to the measurement of the pipeline elevation in a large inspection chamber during pipe jacking construction, with accurate measurement, safety and reliability.

[0038] In a preferred solution, the sonar device 1 includes a sonar detector 12 connected to the central position inside the hollow-structured cylindrical barrel 11; the sonar detector 12 is electrically connected to a controller. When in use, the center of gravity of the sonar detector 12 is located on the axis of the cylindrical barrel 11.

[0039] Preferably, the data line of the sonar detector 12 is electrically connected to the controller, and when the sonar detector 12 is working, the image screen inside the pipeline is displayed on the central computer monitor, facilitating the operator to control the moving direction of the device according to the screen.

[0040] In a preferred solution, the cavity 21 of the lifting and diving balance device 2 is located inside the cylindrical barrel 11 and is connected thereto, an air charging pipe 22, an exhaust pipe 23, and a hose 24 are communicated with the cavity 21, and the exhaust pipe 23 and the hose 24 are led out outside the cylindrical barrel 11; the hose 24 extends into the cavity 21; the solenoid valves provided on the air charging pipe 22 and the exhaust pipe 23 are electrically connected to the controller. When in use, the cavity 21 is used for filling with water or inflating. When filling with water, the solenoid valve on the exhaust pipe 23 is opened, and water enters the cavity 21 from the hose 24 to make the device sink; after the air charging pipe 22 injects air into the cavity 21, the water is discharged from the hose 24, and the device floats up accordingly.

[0041] Preferably, the opening and closing of the exhaust pipe 23 are controlled by the controller to control the solenoid valve.

[0042] In a preferred solution, a counterweight ball 25 is provided at one end of the hose 24 located inside the cavity 21, and the counterweight ball 25 contacts the lower part of the cavity 21. When in use, the gravity of the counterweight ball 25 pulls the hose 24 towards the lower part of the cavity 21, avoiding the phenomenon of empty discharge of the hose 24 when there is water in the cavity 21.

[0043] In a preferred solution, the hose 24 is replaced with a hose of a "θ"-type double pipeline, which has two pipelines. One pipeline is connected to the water inlet and outlet holes to undertake the functions of water inlet and drainage, and the other pipeline is connected to the exhaust hole 23. The counterweight ball 25 is set into upper and lower parts, with the upper part being a floating body and the lower part being a counterweight block. That is, overall, it is necessary to ensure that it can float. Water inlet and outlet holes are provided on the counterweight block and are connected to the pipeline undertaking water inlet and drainage, and an air hole is provided on the floating body and is connected to the pipeline undertaking exhaust. During use, water enters and exits through the water holes of the counterweight block through one pipeline of the "θ"-type hose, and gas is discharged from the exhaust hole through the other pipeline of the "θ"-type hose. The advantages of combining the water inlet and outlet pipe and the exhaust pipe into a "θ"-type double pipeline hose are as follows: First, almost the entire volume of the cavity 21 can be fully utilized to fill water and sink or drain water and float. Second, it avoids the problem that when two hoses are separately provided, the two hoses are twisted together when the cylinder of this device rotates.

[0044] In a preferred solution, the measuring device 3 includes a rotary joint 32 connected to the water inlet end of a pressure gauge 31, and both ends of a pressure conduction hose 33 are respectively connected to the rotary joint 32 and a container 34; the data line of the pressure gauge 31 is tied to the pressure conduction hose 33. During use, the container 34 is at a high position. When the water in the container 34 acts on the pressure gauge 31 along the pressure conduction hose 33, the central computer then displays the pressure value of the pressure gauge 31. During the process of the pressure gauge 31 moving, diving or floating with the device, the pressure value also changes accordingly. At this time, the operator records the pressure values at different stages as parameter values for calculating the pipeline elevation later as needed.

[0045] Preferably, the function of the rotary joint 32 is that during the movement of the device, the rotary joint 32, as a movable connecting part, avoids generating a force that hinders the rotation of this device between the pressure conduction hose 33 and the device body.

[0046] In a preferred solution, a plurality of jet holes 41 of the power device 4 are symmetric with each other and communicate with an air chamber 42 separated by a partition in the cylindrical barrel 11, and a steering mechanism 43 is connected to the cylindrical barrel 11 through a bracket and extends to the lower part of the cylindrical barrel 11. Before use, an air compressor is previously connected to the jet holes 41, and air is inflated into the air chamber 42 through the air compressor. When the air pressure in the air chamber 42 reaches the set value, the inflation stops, and the pressurized gas in the air chamber 42 serves as a power source.

[0047] In a preferred solution, the jet holes 41 are communicated with solenoid valves, and the power supply circuit, air supply circuit and control circuit of the solenoid valves are led out of the cylindrical barrel 11 and are electrically connected to a controller. During use, the controller is located above the ground, and the opening and closing of the solenoid valves on the jet holes 41 are controlled through the controller. When the solenoid valves are opened, the pressurized gas in the air chamber 42 is ejected from the jet holes 41 to push the device to move in the water body.

[0048] In a preferred embodiment, the steering mechanism 43 includes a steering shaft and a steering rudder. The steering shaft is a right-angle steering shaft. One end is connected to the outer wall of the cylindrical barrel 11 through a bracket. The connection between the steering shaft and the bracket allows the bracket to rotate around the axis of the cylinder. The bracket is rigidly connected to the cylindrical barrel 11, and the cylinder can rotate around its axis without restraint. The other end is connected to the steering rudder. The steering rudder is located at the lower part of the cylindrical barrel 11. The power supply circuit and the control circuit of the steering rudder are electrically connected to the controller. When in use, the embedded battery or the ground power supply station of the device supplies power to the steering rudder, and the controller controls the movement of the steering rudder to adjust the moving direction of the device.

[0049] In a preferred embodiment, the elevation measurement method of the device for measuring the elevation of the pipeline in the large well chamber as described above includes the following steps:

[0050] S1. Inflation: Connect an air compressor to the air injection hole 41 to inflate the air chamber 42, and stop inflating after the air pressure reaches the set pressure value.

[0051] S2. Water injection: Inject water into the container 34 to fill the pressure conduction hose 33 with water in the container 34, and the water pressure acts on the pressure gauge 31.

[0052] S3. Set the reference point: Refer to the materials to determine the inner diameter D of the pipeline whose elevation is to be measured, or measure at other positions upstream and downstream where it is easy to measure the pipeline diameter; set a reference point near the wellhead of the large well chamber to be detected, that is, above the ground, and measure the elevation h1 of the reference point.

[0053] S4. Lowering: Close the upstream and downstream pumping stations to make the water flow in the well chamber and the pipeline in a basically static state, and keep the liquid level in the large well chamber higher than the top of the pipeline; fix the container 34 at a higher position above the ground, place the upper part of the cylindrical barrel 11 of the device at the position flush with the reference point, read the reading P1 of the pressure gauge 31, and record the liquid level h2 of the container 34; use the L-bar tool to place the cylindrical barrel 11 of the device into the large well chamber; in this step, the hose 24 is immersed in water.

[0054] S5. Sinking: Open the solenoid valve on the exhaust pipe 23, and water enters the cavity 21 along the hose 24. The device sinks smoothly. When it sinks to a certain depth, close the solenoid valve of the exhaust pipe 23, and the device stops sinking and is in a suspended state; at the same time, turn on the sonar detector 12 to further determine the position of the pipeline nozzle in the well chamber.

[0055] S6. Moving: The controller controls the solenoid valve on the air injection hole 41 to open and the steering rudder to turn, so that the cylindrical barrel 11 of the device enters the nozzle position in the pipeline to be measured; in this step, judge in combination with the direction of the hose 24, and pay attention to observing the change of the sonar image to ensure that the cylindrical barrel 11 of the device enters the interior of the pipeline to be measured, but do not go too deep into the pipeline.

[0056] In S7, the solenoid valve on the charging pipe 22 is opened, and air enters the cavity 21 from the air chamber 42 to inflate the cavity 21. The air in the cavity 21 compresses the water in the cavity 21 to enter the hose 24 through the water inlet and outlet holes of the counterweight ball 25 and finally flow out of the device, causing the cylindrical barrel 11 of the device to float upward and closely adhere to the inner top of the pipe. Since the cylindrical barrel 11 of the device can rotate freely, it will directly rotate to the highest position in the middle of the inner top of the pipe, and the reading P2 of the pressure gauge 31 is read. In this step, it is judged whether the cylindrical barrel 11 of the device is closely adhered to the middle of the inner top of the pipe through the sonar image. If it is not closely adhered to the middle of the inner top of the pipe, the cylindrical barrel 11 of the device is controlled to sink and then float slightly until the main cylindrical barrel 11 of the device is closely adhered to the middle of the inner top of the pipe.

[0057] In S8, record. Since the pressure conduction hose 33 changes from the "bundled" or "coiled" state before use to the "stretched" state during use, and there may be a slight expansion of the pressure conduction hose 33 after bearing a large pressure during the use of the device, the liquid level in the container 34 may drop. Record the liquid level h3 of the container 34 at this time.

[0058] In S9, calculate. The formula H = h1 - (P2 - P1) / ρg - D - (h2 - h3) is used to calculate the elevation of the inner bottom of the pipe, where ρ is the density of the liquid in the pressure conduction hose 33 and the container 34, and g is the acceleration of gravity.

[0059] The above method operates the device to move, dive or float in the pipe on the ground. During this process, the pressure value of the pressure gauge 31 and the liquid level value of the container 34 change. Record the values at different stages and import them into the formula to calculate the pipe elevation. The measurement is accurate, and there is no need for the operator to dive into the pipe for measurement, which is safe and reliable.

[0060] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The embodiments and the features in the embodiments in this application can be combined arbitrarily without conflict. The protection scope of the present invention should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A method for measuring the elevation of a device for measuring the elevation of pipelines in a large well chamber, characterized in that: The device includes a sonar device (1), a lifting and diving balance device (2), a measuring device (3), and a power device (4); at least two lifting and diving balance devices (2) are symmetrically arranged on the sonar device (1). The sonar device (1) is a cylinder, with both ends being cylindrical barrels (11). The pressure gauge (31) of the measuring device (3) is located inside the cylindrical barrel (11), and the steering mechanism (43) of the power device (4) is connected to the cylindrical barrel (11); the pressure conduction hose (33) that is connected to the pressure gauge (31) and extends outside the cylindrical barrel (11) is communicated with a container (34). The sonar device (1) includes a sonar detector (12). The lifting and diving balance device (2) includes a cavity (21), an air filling pipe (22), an exhaust pipe (23), and a hose (24). One end of the hose (24) is provided with a counterweight ball (25). The power device (4) includes an air jet hole (41) and an air chamber (42). Its elevation measurement method includes the following steps: S1, Inflation: Connect an air compressor to the air jet hole (41) to inflate the air chamber (42), and stop inflation after the air pressure reaches the set pressure value. S2, Water injection: Inject water into the container (34) to fill the pressure conduction hose (33) with water in the container (34), and the water pressure acts on the pressure gauge (31). S3, Set a reference point: Refer to materials to determine the inner diameter D of the pipeline whose elevation is to be measured, or measure at other positions upstream and downstream where the pipeline diameter is easy to measure; set a reference point near the wellhead of the large well chamber to be detected, that is, above the ground, and measure the elevation h1 of the reference point. S4, Lowering: Close the upstream and downstream pumping stations to make the water flow in the well chamber and pipeline in a basically static state, and keep the liquid level in the large well chamber higher than the top of the pipeline; fix the container (34) at a relatively high position above the ground, place the upper part of the cylindrical barrel (11) of this device at the position flush with the reference point, read the reading P1 of the pressure gauge (31), and record the liquid level h2 of the container (34); use an L-bar tool to place the cylindrical barrel (11) of this device into the large well chamber; in this step, the hose (24) is immersed in water. S5, Sinking: Open the solenoid valve on the exhaust pipe (23), and water enters the cavity (21) along the hose (24). This device sinks smoothly. When it sinks to a certain depth, close the solenoid valve on the exhaust pipe (23), and this device stops sinking and is in a suspended state; at the same time, turn on the sonar detector (12) to further determine the position of the pipeline nozzle in the well chamber. S6, Moving: The controller controls the solenoid valve on the air jet hole (41) to open and the steering rudder to turn, so that the cylindrical barrel (11) of this device enters the nozzle position inside the pipeline to be measured; in this step, judge in combination with the trend of the pressure conduction hose (33), and pay attention to observing the change of the sonar image to ensure that the cylindrical barrel (11) of this device enters the interior of the pipeline to be measured, but do not go too deep into the pipeline interior. S7. The solenoid valve on the charging pipe (22) is opened, and air enters the cavity (21) from the air chamber (42) to inflate the cavity (21). The air in the cavity (21) compresses the water in the cavity (21) to enter the hose (24) through the water inlet and outlet holes of the counterweight ball (25) and finally flow out of the device, causing the cylindrical barrel (11) of the device to float up and closely adhere to the inner top of the pipe. Since the cylindrical barrel (11) of the device can rotate freely, it will directly rotate to the highest position in the middle of the inner top of the pipe, and read the reading P2 of the pressure gauge (31). S8. Record. Since the pressure conduction hose (33) changes from the "bundled" or "coiled" state before use to the "stretched" state during use, and there may be a slight expansion of the pressure conduction hose (33) under the action of a large pressure during the use of the device, the liquid level in the container (34) may drop. Record the liquid level h3 in the container (34) at this time. S9. Calculate. Use the formula H = h1 - (P2 - P1) / ρg - D - (h2 - h3) to calculate the elevation of the inner bottom of the pipe, where ρ is the density of the liquid in the pressure conduction hose (33) and the container (34), and g is the acceleration due to gravity.

2. The elevation measurement method of the equipment for measuring the elevation of pipelines in a large well chamber according to claim 1, characterized in that: The sonar device (1) includes a sonar detector (12) connected to the central position inside the hollow cylindrical barrel (11). The center of gravity of the sonar detector (12) is located on the axis of the cylindrical barrel 11. The sonar detector (12) is electrically connected to the controller.

3. The elevation measurement method of the equipment for measuring the elevation of the pipeline in the large well chamber according to claim 1, characterized in that: The lifting and diving balance device (2) is located inside the cylindrical barrel (11) and connected to it, and is symmetrically arranged along the axis of the cylindrical barrel. The charging pipe (22), the exhaust pipe (23) and the hose (24) are communicated with the cavity (21). The exhaust pipe (23) and the hose (24) are led out of the cylindrical barrel (11). The hose (24) extends into the cavity (21). The solenoid valves provided on the charging pipe (22) and the exhaust pipe (23) are electrically connected to the controller.

4. The elevation measurement method of the equipment for measuring the elevation of the pipeline in the large well chamber according to claim 1, characterized in that: One end of the hose (24) located inside the cavity (21) is provided with a counterweight ball (25). When the cylindrical barrel (11) rotates, the counterweight ball (25) contacts the lower part of the cavity (21) under the action of gravity.

5. The elevation measurement method of the equipment for measuring the elevation of the pipeline in the large well chamber according to claim 4, characterized in that: The counterweight ball (25) is provided with a plurality of water inlet and outlet holes at different angles.

6. The elevation measurement method of the equipment for measuring the elevation of the pipeline in the large well chamber according to claim 1, characterized in that: The measuring device (3) includes a rotary joint (32) connected to the water inlet end of the pressure gauge (31). The two ends of the pressure conduction hose (33) are respectively connected to the rotary joint (32) and the container (34). The data line of the pressure gauge (31) is tied to the pressure conduction hose (33).

7. The elevation measurement method of the equipment for measuring the elevation of the pipeline in the large well chamber according to claim 1, characterized in that: The multiple air jets (41) of the power device (4) are symmetric with each other and communicated with the air chambers (42) separated by partitions inside the cylindrical barrel (11). The steering mechanism (43) is connected to the cylindrical barrel (11) through a bracket and extends to the lower part of the cylindrical barrel (11).

8. The elevation measurement method of the equipment for measuring the elevation of the pipeline in the large well chamber according to claim 1, characterized in that: The air jets (41) are communicated with the solenoid valves. The power supply circuit, the air supply circuit and the control circuit of the solenoid valves are led out of the cylindrical barrel (11) and electrically connected to the controller.

9. The elevation measurement method of the equipment for measuring the elevation of the pipeline in the large well chamber according to claim 7, characterized in that: The steering mechanism (43) includes a steering shaft and a steering rudder. The steering shaft is a right-angle steering shaft. One end is connected to the outer wall of the cylindrical barrel (11) through a bracket. The connection between the steering shaft and the bracket allows the bracket to rotate around the axis of the cylinder. The bracket is rigidly connected to the cylindrical barrel (11), and the cylinder can rotate around its axis without restraint. The other end is connected to the steering rudder. The rudder blade of the steering rudder is located at the lower part of the cylindrical barrel (11). The power supply circuit and the control circuit of the steering rudder are electrically connected to the controller.

10. The elevation measurement method of the equipment for measuring the elevation of pipelines in a large well chamber according to claim 1, characterized in that: at In S7, it is judged by the sonar image whether the cylindrical barrel (11) of the device is closely attached to the exact middle of the inner top of the pipe. If it is not closely attached to the exact middle of the inner top of the pipe, the cylindrical barrel (11) of the device is controlled to sink slightly and then float until the main cylindrical barrel (11) of the device is closely attached to the exact middle of the inner top of the pipe.

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