CN219640946U

CN219640946U - Piston inclination detector

Info

Publication number: CN219640946U
Application number: CN202320250946.8U
Authority: CN
Inventors: 程志; 江华根
Original assignee: Beijing Jiuyi Technology Co ltd
Current assignee: Beijing Jiuyi Technology Co ltd
Priority date: 2023-02-10
Filing date: 2023-02-10
Publication date: 2023-09-05
Anticipated expiration: 2033-02-10

Abstract

The utility model relates to a piston inclination detector which comprises a detection device controller and a plurality of groups of measurement components, wherein the measurement components comprise a communication pipe and two measurement barrels, the two measurement barrels of the measurement components are uniformly distributed along the circumferential direction of a gas tank piston and are fixed on the gas tank piston, communication ports at the bottoms of the two measurement barrels of the measurement components are communicated through the communication pipe, a first stop valve is arranged in the middle of the communication pipe, and the measurement components of each group are arranged at intervals along the circumferential direction of the gas tank piston; the detection ends of the detection devices are connected to the communication pipe at the two sides of the first stop valve and close to the first stop valve, and the detection devices are used for detecting the liquid level, the pressure or the pressure difference of filling liquid in the two measuring cylinders of the measurement assembly; the controller is in communication connection with the detection device; the piston inclination detector can be used for detecting the piston inclination of the gas tank in real time in a time-saving, labor-saving and low-cost manner, and is more sensitive in measurement and rapid in reaction.

Description

Piston inclination detector

Technical Field

The utility model relates to the technical field of ferrous metallurgical equipment, in particular to a piston inclination detector.

Background

In the ferrous metallurgy industry, a gas tank is an important container for storing gas, and has the function of adjusting the gas pressure, and mainly comprises a wet gas tank and a dry gas tank, the prior dry gas tank is mainly applied, a piston of the dry gas tank is inclined in the gas storage process, if the piston is not corrected and adjusted in time, mechanical collision can occur when the piston is inclined beyond a certain range, a rubber membrane of the piston is extruded or wrinkled, the rubber membrane is damaged, and safety accidents occur when the gas leaks.

At present, two main modes exist for monitoring the inclination angle of a piston of a gas holder, one is that a ring-shaped water pipe system is arranged around the piston, transparent glass pipes and graduated scales are arranged on the ring-shaped water pipe system at equal intervals, the inclination angle is judged by periodically observing the liquid level of each square point of the ring-shaped communication pipe by personnel, the operation is stopped usually every other week, and workers climb up to check and record from the inside of the Kong Zuanru gas holder. The method is time-consuming and labor-consuming, cannot be operated on line, cannot master the dynamic situation in the cabinet in real time, has high accident rate, and meanwhile, when personnel enter the cabinet, the recovery of gas must be stopped, so that a large amount of gas can only be diffused, energy is wasted and the environment is polluted; the method for measuring the piston displacement height difference of the gas tank by adopting the high-precision laser range finder is characterized in that 4 to 8 high-precision laser range finders are arranged at the top end of the gas tank at equal intervals, the piston inclination condition is calculated by measuring the distance change from each point of the piston to the tank top, the high-precision laser range finders are required to be installed at specific positions of the tank top in the high-precision laser range finders measuring scheme, the cutting fire operation is involved, the gas tank is required to be stopped and operated, the construction difficulty is high, the height is usually 50 to 100 meters due to the large body weight of the gas tank, the tank body is of a metal structure, the influence of the vibration of the tank body on laser is processed, and the thermal expansion and contraction phenomenon caused by the temperature difference of the tank body also can bring a plurality of random errors to the measuring precision of the laser.

Disclosure of Invention

The utility model aims to provide a piston inclination detector, which can detect the inclination of a piston of a gas tank in real time, reduce the accident rate, avoid shutdown, save time and labor, detect the inclination of the piston of the gas tank with lower cost and meet the precision requirement of the inclination measurement of the piston of the gas tank.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a piston tilt detector for measuring tilt height and orientation of a gas holder piston, comprising:

the gas tank piston is characterized by comprising a plurality of groups of measuring components, wherein each measuring component comprises a communication pipe and two measuring cylinders for containing filling liquid, the two measuring cylinders of each measuring component are uniformly distributed along the circumferential direction of the gas tank piston and are fixed on the gas tank piston, communication ports at the bottoms of the two measuring cylinders of each measuring component are communicated through the communication pipe, a first stop valve is arranged in the middle of the communication pipe, and each group of measuring components are arranged at intervals along the circumferential direction of the gas tank piston;

the detection ends of the detection devices are connected to the communication pipe at the positions which are on the two sides of the first stop valve and close to the first stop valve, and the detection devices are used for detecting the liquid level, the pressure or the pressure difference of the filling liquid in the two measuring cylinders of the measuring assembly;

and the controller is in communication connection with the detection device.

Optionally, the detection device includes with the multiple differential pressure transmitter that measurement subassembly one-to-one set up, differential pressure transmitter's malleation side and negative pressure side respectively through draw the pressure pipe with the correspondence the communication pipe of measurement subassembly communicates in the both sides of first stop valve, differential pressure transmitter is located measurement subassembly's below.

Optionally, the differential pressure transmitter is hoisted above the gas tank piston, and the pressure guiding pipe is a hose, so that the differential pressure transmitter can swing freely relative to the gas tank piston and always keeps a hanging state.

Optionally, a second stop valve is arranged on the pressure guiding pipe.

Optionally, each differential pressure transmitter is disposed near a central axis of the gas chamber piston.

Optionally, the measuring cartridge comprises:

the cylinder body is provided with the communication port at the bottom of the cylinder body or near the cylinder wall of the bottom of the cylinder body;

the cylinder cover is covered at the top opening of the cylinder body, and is provided with a waterproof ventilation valve.

Optionally, the distance from the upper edge of the communication port of the measuring cylinder to the top of the measuring cylinder is not less than 2 times of the maximum value of the inclined height difference of the gas tank piston.

Optionally, the communication port is provided with a third stop valve.

Optionally, the communication pipe is not higher than the communication port.

Optionally, the piston inclination detector comprises two groups of measuring assemblies, and four measuring cylinders of the two groups of measuring assemblies are arranged in four directions of the piston of the gas tank, namely, four directions of the piston in the north and the east.

According to the technical scheme, the utility model discloses a piston inclination detector which is used for measuring the inclination height and the direction of a gas tank piston and comprises a controller, a detection device and a plurality of groups of measurement components, wherein the measurement components comprise a communication pipe and two measurement barrels used for containing filling liquid, the two measurement barrels of the measurement components are uniformly distributed and fixed on the gas tank piston along the circumferential direction of the gas tank piston, communication ports at the bottoms of the two measurement barrels of the measurement components are communicated through the communication pipe, a first stop valve is arranged in the middle of the communication pipe, and each group of measurement components are arranged at intervals along the circumferential direction of the gas tank piston; the detection ends of the detection devices are connected to the communication pipe at the two sides of the first stop valve and close to the first stop valve, and the detection devices are used for detecting the liquid level, the pressure or the pressure difference of filling liquid in the two measuring cylinders of the measurement assembly; the controller is in communication connection with the detection device; when the device is applied, firstly, assembling a piston tilt detector, checking whether each interface is tight and has no leakage after assembling, enabling the first stop valve to be fully opened so as to facilitate discharging air in a pipeline of the piston tilt detector, then filling liquid into a measuring cylinder and a communicating pipe, when the filling liquid is filled in the pipeline and is positioned in the middle of the measuring cylinder, the density parameter of the filling liquid is clear, the measuring cylinder can be used for measuring and calculating the density rho, when the liquid level of each measuring cylinder is at the same height, the filling liquid is completely filled, if the liquid level of each measuring cylinder is inconsistent, the piston tilt detector is used for checking whether the piston tilt detector is blocked, bubble or leaked, after the piston tilt detector is electrified and displays that communication is normal, zeroing is carried out on a system, namely, a detecting device is reset, after the zero is regulated, the first stop valve in the middle of the communicating pipe can be closed, and if small deviation exists after the zero point is closed, the measuring cylinder is reset again, when the liquid level of the measuring cylinder is inclined, or the two measuring cylinders close to the measuring component in the inclined direction, and the filling liquid level is also inclined, and if the liquid level of the two measuring cylinders is inclined, the liquid level difference is detected according to the pressure difference, namely, the pressure difference between the measuring device is obtained when the liquid level difference in the measuring cylinder is measured according to the pressure difference, and the pressure difference is known when the two measuring cylinder is detected, and the liquid level difference is detected in the pressure difference; therefore, the piston inclination detector provided by the utility model can detect the inclination angle change of the gas tank piston in real time, does not need to be stopped, does not need to be observed by staff on site, does not need to fire, has low construction difficulty, is simple to debug and maintain, has low cost compared with a high-precision laser range finder, can detect the inclination of the gas tank piston in real time in a time-saving and labor-saving manner and with low cost, converts and amplifies the inclination angle change of the gas tank piston into the height difference change of the liquid level in the measuring cylinder, is more sensitive in measurement, has less quantity of connecting instruments, is quicker in response, and has higher cost advantage compared with the high-precision laser range finder.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a top view of a piston tilt detector according to an embodiment of the present utility model;

fig. 2 is a front view of a measuring cylinder of a piston inclination detector according to an embodiment of the present utility model;

fig. 3 is a flowchart of the operation process of the piston tilt detector according to the embodiment of the present utility model.

In the figure:

1 is a measuring cylinder; 101 is a cylinder; 102 is a cylinder cover; 103 is a waterproof ventilation valve; 2 is a third stop valve; 3 is a communicating pipe; 4 is a first stop valve; 5 is a pressure guiding pipe; 6 is a second stop valve; 7 is a differential pressure transmitter; 8 is a controller.

Detailed Description

The utility model has the core of providing a piston inclination detector, which has the structural design that the piston inclination detector can detect the piston inclination of a gas tank in real time, reduce the accident rate, avoid shutdown, save time and labor, detect the piston inclination of the gas tank with lower cost and meet the precision requirement of the piston inclination measurement of the gas tank.

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, fig. 1 is a top view of a piston tilt detector according to an embodiment of the utility model.

The embodiment of the utility model discloses a piston inclination detector which is used for measuring the inclination height and the inclination direction of a piston of a gas tank and comprises a controller 8, a detection device and a plurality of groups of measurement components.

The measuring assembly comprises a communicating pipe 3 and two measuring cylinders 1 for containing filling liquid, and according to the principles of freezing prevention, low viscosity, stability, no corrosion and economy, the embodiment of the utility model adopts glycol solution as the filling liquid, and of course, in other embodiments, other freezing prevention and no corrosion stable liquids such as silicone oil, heat conducting oil and the like can be adopted as the filling liquid.

The two measuring cylinders 1 of the measuring assembly are uniformly distributed along the circumference of the gas tank piston and are fixed on the gas tank piston, the fixed positions of the measuring cylinders 1 can be on a bracket or a pavement of the outer circumference of the gas tank piston, the communication ports at the bottoms of the two measuring cylinders 1 of the measuring assembly are communicated through a communication pipe 3, a first stop valve 4 is arranged in the middle of the communication pipe 3, each group of measuring assemblies are arranged at intervals along the circumference of the gas tank piston, and the communication pipe 3 can be radially paved at the top of the gas tank piston and also circumferentially paved at the top of the gas tank piston.

The detection ends of the detection device are connected into the communication pipe 3 at the two sides of the first stop valve 4 and near the first stop valve 4, and the detection device is used for detecting the liquid level, the pressure or the pressure difference of the filling liquid in the two measuring cylinders 1 of the measurement assembly, namely the detection device comprises, but is not limited to, a differential pressure transmitter 7, a liquid level meter and a pressure transmitter; the controller 8 is in communication connection with the detection device, and the controller 8 can be an industrial personal computer or a PLC.

When the device is applied, firstly, the piston tilt detector is assembled, after the assembly is completed, all interfaces are checked to be tight and have no leakage, so that the first stop valve 4 is fully opened, air in a pipeline of the piston tilt detector is conveniently discharged, then filling liquid is filled into the measuring cylinder 1 and the communicating pipe 3, when the filling liquid is filled in the pipeline and is positioned in the middle of the measuring cylinder 1, the density parameter of the filling liquid is clear, the measuring cup is used for measuring and calculating the density rho, when the liquid level of each measuring cylinder 1 is positioned at the same height, the filling liquid filling is described, if the liquid level of each measuring cylinder 1 is inconsistent, the piston tilt detector is checked to have the conditions of blockage, bubble or leakage, after the piston tilt detector is electrified and displays that communication is normal, zero setting is carried out on the system when a gas tank piston descends to return to zero position, namely, the detecting device is reset, after the zero setting is completed, the first stop valve 4 in the middle of the communicating pipe 3 is closed, if small amplitude offset is required, the zero setting is carried out again, when the gas piston is inclined, thus, when the two measuring cylinders 1 of a measuring cylinder assembly in the tilt direction or a measuring chamber component in the tilt direction or a tilt direction are inclined, the liquid level of the two measuring cylinders are positioned at the same height, the two measuring cylinders are in the tilt direction, and the tilt direction or the liquid level of the measuring cylinder 1 is different, namely, and the pressure difference between the two tilt measuring cylinder 1 and the two tilt direction and the pressure sensor can be measured according to the pressure difference is obtained, and the pressure difference when the pressure difference in the measuring device is measured.

Compared with the prior art, the piston inclination detector provided by the embodiment of the utility model can detect the inclination angle change of the gas tank piston in real time, does not need to be stopped, does not need to be observed by staff on site, does not need to operate on fire, has low construction difficulty, is simple to debug and maintain, has low cost compared with a high-precision laser range finder, can detect the inclination of the gas tank piston in real time in a time-saving and labor-saving manner and has lower cost, converts the inclination angle change of the gas tank piston into the height difference change of the liquid level in the measuring cylinder 1, is more sensitive in measurement, has less quantity of connecting instruments, is quicker in response, and has higher cost advantage compared with the high-precision laser range finder.

Specifically, in one embodiment of the present utility model, the detection device includes a plurality of differential pressure transmitters 7 disposed in one-to-one correspondence with the measurement assemblies, the positive pressure side and the negative pressure side of the differential pressure transmitters 7 are respectively connected to two sides of the first stop valve 4 through the pressure guiding pipes 5 and the corresponding communication pipes 3 of the measurement assemblies, the differential pressure transmitters 7 are located below the measurement assemblies, the measuring ranges of the differential pressure transmitters 7 are selected according to the pressure generated when the two measurement barrels 1 of the measurement assemblies are filled with the liquid, and the negative pressure to the positive pressure of the differential pressure measuring ranges are symmetrically disposed, for example, the measuring ranges are set to-500 pa (current 4 ma) to 500pa (current 20 ma).

In the above-mentioned detection device, the connection positions of the pressure guiding pipes 5 of the differential pressure transmitter 7 and the corresponding communication pipes 3 are close to each other, i.e. the connection positions of the pressure guiding pipes 5 of the two communication pipes 3 should be located near the same position, for example, near the first stop valve 4.

According to the technical scheme, the differential pressure transmitter 7 is hoisted above the gas tank piston, and the pressure guiding pipe 5 is a hose, so that the differential pressure transmitter 7 can swing freely relative to the gas tank piston and always keeps a hanging state, and therefore, when the gas tank piston moves or inclines, the differential pressure transmitter 7 is not influenced by the gas tank piston.

As shown in fig. 1, in the embodiment of the present utility model, the pressure guiding pipe 5 is provided with a second shut-off valve 6.

Further, in the embodiment of the present utility model, the optimal installation position of each differential pressure transmitter 7 is set near the central axis of the gas tank piston, that is, the center of the connecting line of the two measuring cylinders 1 of the measuring assembly.

As shown in fig. 2, in the embodiment of the present utility model, the measuring cylinder 1 includes a cylinder 101 and a cylinder cover 102, wherein a bottom of the cylinder 101 or a cylinder wall near the bottom is provided with a communication port; the cylinder cover 102 is covered at the top opening of the cylinder body 101, the cylinder cover 102 is provided with a waterproof ventilation valve 103, and the waterproof ventilation valve 103 is used for preventing dust, reducing evaporation and simultaneously exhausting air normally.

In the embodiment of the utility model, the distance from the upper edge of the communication port of the measuring cylinder 1 to the top of the measuring cylinder 1 is not less than 2 times of the maximum value of the tilting height difference of the gas tank piston, so that the normal operation of the measuring cylinder 1 is ensured in the tilting process.

As shown in fig. 2, in the embodiment of the present utility model, the communication port is provided with a third stop valve 2.

Further, in the embodiment of the present utility model, the communication pipe 3 is not higher than the communication port.

As shown in fig. 1, in one embodiment, the piston tilt detector includes two sets of measuring assemblies, and four measuring cylinders 1 of the two sets of measuring assemblies are disposed in four north-south directions of a gas tank piston.

The specific operation of the piston inclination detector will be described in detail below using the differential pressure transmitter 7 as an example of the detection device.

As shown in fig. 1 and 3, the piston inclination detector comprises two sets of measuring components, four measuring cylinders 1 of the two sets of measuring components are arranged at four positions of a gas tank piston in the north-south direction, after the measuring cylinders 1 are fixed, the piston inclination detector is assembled, after the assembly is completed, all interfaces are checked to be tight and have no leakage, so that the first stop valve 4, the second stop valve 6 and the third stop valve 2 are all opened so as to facilitate the discharge of air in a pipeline of the piston inclination detector, filling liquid is filled into the measuring cylinders 1, the communication pipe 3, the pressure guiding pipe 5 and the differential pressure transmitter 7, simultaneously, the exhaust valves on the differential pressure transmitter 7 are gradually opened, the air in a bellows chamber of the pressure guiding pipe 5 and the differential pressure transmitter 7 is discharged, when the filling liquid is filled in the middle position of the measuring cylinders 1, the density parameters of the filling liquid are definite, the calculation density rho can also be measured by using a measuring cup, when the liquid level of each measuring cylinder 1 is at the same height, the completion of filling liquid is indicated, if the liquid level of each measuring cylinder 1 is inconsistent, whether the piston inclination detector is blocked, air bubbles or leaked is checked, after the piston inclination detector is electrified, the communication is normal, when the piston of the gas tank descends to return to zero position, the system is zeroed, namely the differential pressure transmitter 7 is zeroed, after the zero point is zeroed, the first stop valve 4 in the middle of the communication pipe 3 can be closed, the second stop valve 6 on the pressure guiding pipe 5 and the third stop valve 2 at the communication port of the measuring cylinder 1 are kept in an open state, if the zero point is closed, the differential pressure transmitter 7 can be pushed to a small extent after the first stop valve 4 is closed, the differential pressure fluctuation condition is observed, and the differential pressure fluctuation is normally avoided, and the differential pressure transmitter 7 can recover the zero point after the position is stable.

The differential pressure measured by the differential pressure transmitter 7 connecting the north and south side measuring cylinders 1 is Δp1, and the corresponding north side measuring cylinder 1 is inclined by the height hN, and the south side measuring cylinder 1 is inclined by the height hS.

Δh1=hn-hs—the difference in inclination height of the north side corresponding to the south side measuring cylinder 1;

the differential pressure measured by the differential pressure transmitter 7 connecting the east side and west side measuring cylinders 1 is Δp2 in the same way, and the corresponding east side measuring cylinder 1 is inclined by the height hE, and the west side measuring cylinder 1 is inclined by the height hW.

Δh2=he-hw—the difference in inclination height of the east and west side cartridges 1;

the density ρ of the filling liquid is known, and is obtained from the pressure calculation formula:

wherein ρ -the density of the filler liquid (Kg/m) ³ )；

g-acceleration of gravity (squaremeter/s);

Δp1, Δp2—differential pressure (Pa) measured by two differential pressure transmitters 7, respectively;

Δh1 and Δh2, namely the inclined height difference of two opposite measuring cylinders 1 of the measuring assembly, namely the inclined height difference of the corresponding two-position gas holder pistons;

according to the above, when the differential pressure value measured by the differential pressure transmitter 7, the inclination height difference of the corresponding position of the piston of the gas holder, east-west and north-south can be calculated. The positive and negative values of the height difference are consistent with the positive and negative values of the differential pressure.

As shown in the schematic diagram of fig. 3, the industrial personal computer or the PLC performs related calculation and display according to the collected differential pressure data, and determines the azimuth interval where the highest inclination point is located by positive and negative values of the Δh1 and Δh2 height differences, and meanwhile, deflects the angle:

α=arctan (|Δh2/|Δh1|) (h1+.0, when h1=0, α=90°):

Δh1 is greater than or equal to 0, and Δh2 is greater than or equal to 0; the highest point azimuth is north-east alpha;

Δh1 is more than or equal to 0, and Δh2 is less than 0; the highest point azimuth is north meta-west alpha;

Δh1 is less than 0, and Δh2 is more than or equal to 0; the highest point azimuth is south-east alpha;

Δh1 < 0, Δh2 < 0; the highest point azimuth is south partial west alpha;

calculating the height difference between the highest tilting point and the center point of the piston according to the height differences of two mutually perpendicular directions:

it should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.

It should be appreciated that the use of "systems," "devices," "units," and/or "modules" in this disclosure is but one way to distinguish between different components, elements, parts, portions, or assemblies at different levels. However, if other words can achieve the same purpose, the word can be replaced by other expressions.

As used in the specification and in the claims, the terms "a," "an," "the," and/or "the" are not specific to a singular, but may include a plurality, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and they do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus. The inclusion of an element defined by the phrase "comprising one … …" does not exclude the presence of additional identical elements in a process, method, article, or apparatus that comprises an element.

Wherein, in the description of the embodiments of the present utility model, unless otherwise indicated, "/" means or, for example, a/B may represent a or B; "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, in the description of the embodiments of the present utility model, "plurality" means two or more than two.

The terms "first" and "second" are used below for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

If a flowchart is used in the present utility model, the flowchart is used to describe the operations performed by a system according to an embodiment of the present utility model. It should be appreciated that the preceding or following operations are not necessarily performed in order precisely. Rather, the steps may be processed in reverse order or simultaneously. Also, other operations may be added to or removed from these processes.

It should also be noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in an article or apparatus that comprises such element.

The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the core concepts of the utility model. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.

Claims

1. A piston tilt detector for measuring tilt height and orientation of a gas holder piston, comprising:

and the controller is in communication connection with the detection device.

2. The piston tilt detector of claim 1, wherein the detecting means comprises a plurality of differential pressure transmitters arranged in one-to-one correspondence with the measuring assembly, the positive pressure side and the negative pressure side of the differential pressure transmitters are respectively communicated with the two sides of the first stop valve through pressure guiding pipes and the corresponding communication pipes of the measuring assembly, and the differential pressure transmitters are positioned below the measuring assembly.

3. The piston inclination detector of claim 2 wherein the differential pressure transmitter is suspended above the gas holder piston and the pressure guiding tube is a hose so that the differential pressure transmitter can swing freely relative to the gas holder piston and remain suspended all the time.

4. The piston tilt detector of claim 2, wherein the pressure line is provided with a second shut-off valve.

5. The piston tilt sensor of claim 2, wherein each differential pressure transmitter is disposed proximate a central axis of the gas chamber piston.

6. The piston tilt detector according to any one of claims 1-5, wherein the measuring cylinder comprises:

7. The piston tilt sensor of any of claims 1-5, wherein the distance from the upper edge of the communication port of the measuring cylinder to the top of the measuring cylinder is no less than 2 times the maximum value of the piston tilt height difference of the gas holder.

8. The piston tilt detector according to any one of claims 1-5, wherein the communication port is provided with a third shut-off valve.

9. The piston tilt sensor of any of claims 1-5, wherein the communication tube is not higher than the communication port.

10. The piston tilt sensor of any of claims 1-5, wherein the piston tilt sensor comprises two sets of the measuring assemblies, four of the measuring cylinders of the two sets of measuring assemblies being disposed in four north-south orientations of the gas cell piston.