CN220230865U

CN220230865U - Detection device for detecting air tightness of pipeline

Info

Publication number: CN220230865U
Application number: CN202321380468.9U
Authority: CN
Inventors: 廖国强; 史友嘉; 许艾斌; 杨平; 袁锐
Original assignee: Foshan Institute Of Inspection Guangdong Institute Of Special Equipment Inspection
Current assignee: Foshan Institute Of Inspection Guangdong Institute Of Special Equipment Inspection
Priority date: 2023-06-01
Filing date: 2023-06-01
Publication date: 2023-12-22
Anticipated expiration: 2033-06-01

Abstract

The utility model relates to a detection device for detecting air tightness of a pipeline, which belongs to the technical field of pipeline detection and comprises two sealing covers and a detection ring, wherein any one sealing cover comprises a sealing ring and an outer cover, one end of the sealing ring is connected with the outer cover, the two sealing covers are connected with two ends of the pipeline through the sealing ring, the inner surface of the detection ring is connected with the outer surface of the pipeline, a detection cavity is formed in the detection ring, the outer cover and the detection ring are both provided with a pressure gauge, any one outer cover is penetrated with an air pump, one end, far away from the outer cover, of the two sealing rings is respectively provided with a first connecting ring and a second connecting ring, the outer diameter of the first connecting ring is equal to the inner diameter of the second connecting ring, and the two sealing covers are in contact connection through the connecting rings; the self-checking function of the air tightness detecting device enables the air tightness detecting result to be more accurate.

Description

Detection device for detecting air tightness of pipeline

Technical Field

The utility model belongs to the technical field of pipeline detection, and particularly relates to a detection device for detecting air tightness of a pipeline.

Background

The pipeline is a device for conveying gas, liquid or fluid with solid particles, which is formed by connecting pipes, pipe connectors, valves and the like, is widely applied to various production and living fields, is mainly used in water supply, water drainage, heat supply, gas supply, long-distance petroleum and natural gas conveying, agricultural irrigation, hydraulic engineering and various industrial devices, and is extremely easy to cause fluid in the pipeline to flow out due to the fact that the transportation of the pipeline is mostly fluid, meanwhile, the pipeline is long in length, the probability of breakage is high, and a pipeline air tightness detection device is needed.

Chinese patent CN111141465B discloses a gas tightness detecting device for welding metal pipes, which relates to the technical field of pipe welding, and comprises a sealing cover, a detecting cylinder and a pressure gauge; the sealing cover is connected with the pipe orifice of the pipeline, and the fixing bolts are respectively positioned at the upper end and the lower end of the sealing cover; the air pump is connected with an external power supply circuit through a power line; the detection cylinder is sleeved on the outer wall of the pipeline welding part, and the inside of the detection cylinder is hollow; the connecting bolts are arranged at two positions in total, and the two connecting bolts are connected to the outer side of the detection cylinder; the pressure gauge is communicated with the inside of the detection cylinder; the welding seam of the pipeline is divided into twelve parts through the air leakage detection cavity, so that the welding seam outside the pipeline is detected through the pressure gauge sub-area communicated with the air leakage detection cavity, the detection precision of the welding seam is improved, and when the air leakage point of the pipeline is found, the area where the air leakage point of the pipeline is located is locked through the pressure gauge, so that a person can weld and repair the air leakage point of the pipeline; however, the pipeline crack is sometimes tiny, the leakage of the tiny crack is not obvious, and when the scheme is used for detection, if the detection device leaks gas with probability, the gas does not leak from the tiny crack, but leaks from the defect of the detection device, the existing crack cannot be detected, and meanwhile, even if the gas leaks from the pipeline crack, the leakage quantity is too low and cannot be detected by the pressure gauge, and the normally detectable leakage condition cannot be detected, so that the detection device with the self-detection function for detecting the pipeline air tightness is needed.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides a self-checking device with the characteristic of more accurate air tightness detection result.

The aim of the utility model can be achieved by the following technical scheme:

the utility model provides a detection device for detecting pipeline gas tightness, includes two sealed covers and detection ring, arbitrary sealed lid includes sealing ring and enclosing cover, sealing ring one end is connected with the enclosing cover, two sealed lid passes through the sealing ring and is connected with pipeline both ends, the detection ring internal surface is connected with the pipeline surface, it has the detection chamber to detect the inside opening of ring, enclosing cover and detection ring all are equipped with the manometer, arbitrary the air pump is worn to be equipped with by the enclosing cover.

As a preferable technical scheme of the utility model, one end of each sealing ring far away from the outer cover is respectively provided with a first connecting ring and a second connecting ring, the outer diameter of each first connecting ring is equal to the inner diameter of each second connecting ring, and the two sealing covers can be in contact connection through the connecting rings.

As a preferable technical scheme of the utility model, a plurality of positioning cavities are formed in the detection cavity in a surrounding mode, a pressure gauge is correspondingly arranged in any positioning cavity, one end of any pressure gauge is communicated with the positioning cavity, and the other end of the pressure gauge is connected with the outer surface of the detection ring.

As a preferable technical scheme of the utility model, any pressure gauge is electrically connected with an alarm module, and the pressure gauge controls the alarm module to send out an alarm signal.

As a preferable technical scheme of the utility model, the outer surfaces of the two connecting rings are provided with locking devices, and the locking devices of the two sealing rings are mutually matched.

As a preferred technical scheme of the utility model, the fixing assembly further comprises a fixing ring and a locking ring, wherein the fixing ring is arranged on the inner surface of the first connecting ring, and the locking ring is detachably connected with the outer surface of the second connecting ring.

As a preferred embodiment of the present utility model, the fixing ring is made of a high carbon steel material.

As a preferable technical scheme of the utility model, the sealing ring and the connecting ring are both made of rubber materials with sulfur content of 20-25%.

As a preferable technical scheme of the utility model, the detection ring is composed of two semi-rings, one ends of the two semi-rings are mutually hinged, and the other ends of the two semi-rings are detachably connected.

The beneficial effects of the utility model are as follows:

(1) The connecting rings are arranged on the sealing cover and can be mutually sleeved, so that the sealing cover can finish self-detection, and the leakage of the detection device is prevented from influencing the detection of the air tightness of the pipeline;

(2) Through set up fixed subassembly on the go-between, can prevent that two sealed covers from taking place to leak in the junction of self-checking in-process, improve the self-checking accuracy.

Drawings

The present utility model is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.

FIG. 1 is a schematic view of the structure of the present utility model for detecting the air tightness of a pipeline;

FIG. 2 is a schematic partial cross-sectional view of two seal caps of the present utility model;

FIG. 3 is a schematic view of a partial cross section of the two seal caps of the present utility model in self-test of tightness;

FIG. 4 is a schematic diagram of a detection ring according to the present utility model;

FIG. 5 is a side view of the detection ring of the present utility model in closed and locked condition;

FIG. 6 is a side view of the sensing ring of the present utility model with the sensing ring open;

fig. 7 is a side view of the locking ring of the present utility model.

Description of main reference numerals:

in the figure: 1. a pipeline to be tested; 2. sealing cover; 21. an outer cover; 22. a locking ring; 23. an air pump; 24. a seal ring; 25. a first connection ring; 26. a second connecting ring; 27. a fixing ring; 3. a pressure gauge; 4. a detection ring; 41. a positioning cavity; 42. and (5) connecting a plate.

Detailed Description

In order to further describe the technical means and effects adopted by the utility model for achieving the preset aim, the following detailed description is given below of the specific implementation, structure, characteristics and effects according to the utility model with reference to the attached drawings and the preferred embodiment.

Referring to fig. 1-7, a detecting device for detecting air tightness of a pipeline comprises two sealing covers 2 and a detecting ring 4, wherein any sealing cover 2 comprises a sealing ring 24 and an outer cover 21, one end of the sealing ring 24 is connected with the outer cover 21, the two sealing covers 2 are connected with two ends of the pipeline through the sealing ring 24, the sealing cover 2 is provided with an air pump 23, one end of the air pump 23 is connected with one side of the sealing cover 2, which is provided with the sealing ring 24, the sealing ring 24 is made of rubber, a detecting cavity surrounding the pipeline 1 to be detected is formed on one side of the detecting ring 4, the edge of the detecting ring 4 on one side close to the pipeline is attached to the outer surface of the pipeline, the outer cover 21 and the detecting ring 4 are both provided with a pressure gauge 3, the outer diameter of the sealing ring 24 is slightly larger than the inner diameter of the pipeline to be detected, in this embodiment, the outer diameter of the sealing ring 24 is 2mm larger than the inner diameter of the pipeline to be detected, firstly, placing two sealing covers 2 at two side openings of a pipeline to be checked for air tightness, then aligning one end with a sealing ring 24 to the pipeline opening, simultaneously, because the sealing ring 24 is made of rubber and has a certain deformation space, after the sealing ring 24 is plugged into the pipeline opening, the outer wall of the pipeline is contracted inwards, the rebound trend of the sealing ring 24 enables the outer surface of the sealing ring 24 to be abutted with the inner surface of the pipeline, so that the sealing ring 24 seals two ends of the pipeline, then, sleeving a detection ring 4 at a position to be detected on the outer surface of the pipeline, arranging a detection cavity on the detection ring 4, wherein one side of the detection cavity close to the pipeline is hollow and can be tightly attached to the outer wall of the pipeline, then, operating an air pump 23 arranged on the surface of the sealing ring 24 to inflate the sealed pipeline, so that the air pressure in the pipeline is slightly larger than the atmospheric pressure, and then observing whether the air pressure displayed by a pressure meter 3 at the sealing cover 2 is changed or not, if so, the gas in the pipeline is proved to leak, namely the pipeline is proved to have cracks, at the moment, the pipeline axially slides, whether the pressure gauge 3 at the detection ring 4 displays the air pressure change is observed, if the air pressure change occurs when the detection ring 4 is conveyed to a certain position, the position is proved to have a leakage point, so that the air continuously flows into the detection cavity to cause the air pressure change in the detection cavity, and an operator can conduct further crack investigation on the coverage area of the detection ring 4 according to the position of the detection ring 4.

In the detection process of the airtight detection device, although the detection cavity coverage position of the detection ring 4 can be determined according to the position of the detection ring 4, according to the above process, an operator cannot know which specific position in the coverage area of the detection cavity is leaked, and extra labor is required to find a specific leakage point, therefore, the inside of the detection cavity is surrounded by a plurality of partition boards to separate a plurality of positioning cavities 41, a pressure gauge 3 is correspondingly arranged in any positioning cavity 41, one end of any positioning cavity 3 is communicated with the inside of the positioning cavity 41, the other end of the positioning cavity is connected with the outer surface of the detection ring 4, the height of the partition boards is equal to the depth of the positioning cavity 41, in the embodiment, ten positioning cavities 41 are all connected with the partition boards and the pipeline surface after the detection ring 4 is attached to the surface of the pipeline 1 to be detected, so that when the detection ring 4 covers the pipeline leakage position in the detection process, the leakage position is located under one positioning cavity 41, pipeline gas leaks into one positioning cavity 41 to cause the pressure gauge 3 of the positioning cavity 41 to change, meanwhile, the connection between the positioning cavities 41 is blocked by the partition boards and the pipeline gas to flow into the corresponding positioning cavities to the positioning cavity 41, and the leakage position is only accurately read through the positioning cavities, and the positioning cavities 41 can be positioned and the position and the leakage position is only corresponding to the positioning cavities to the position in the positioning cavities 41.

In the above detection process, the hole to be detected may be smaller, and the leakage is not easily detected, so when the detection device itself has leakage, the gas is likely to leak from the defect of the detection device instead of leaking from the hole on the side wall of the pipeline, or when the detection device itself has leakage, even if a part of the gas leaks from the crack, the pressure gauge 3 itself has limitation of detection sensitivity, the leakage of the gas split at the leakage position of the detection device has a probability that the leakage gas at the pipe wall cannot trigger the reading change of the pressure gauge 3, the leakage which should be detected cannot be detected can not be detected, in order to solve the problem, one end of the two sealing rings 24 far away from the outer cover 21 is respectively provided with the first connecting ring 25 and the second connecting ring 26, the outer diameter of the first connecting ring 25 is equal to the inner diameter of the second connecting ring 26, the second connecting ring 26 can be sleeved outside the first connecting ring 25, when the detection device is required to perform self-detection air tightness, the two sealing covers 2 are hermetically connected through the two connecting rings sleeved mutually, the inner spaces of the two sealing covers 2 are combined to form a large inner space, then the large inner space is formed through the two sealing covers, and then the large inner space 23 on one sealing cover can not trigger the reading change of the pressure gauge 3, if the two sealing covers are closely connected to the inner space, and the detection device has no requirement that the air tightness change is different from the inner space, and the inner sealing device is proved to have no requirement.

In the above detection process, the pressure gauge 3 with ten positioning cavities 41 and the pressure gauge 3 with two sealing covers 2 need to be checked and recorded by operators in real time, the workload is large, in order to reduce the workload of the operators, each pressure gauge 3 is electrically connected with an alarm module, the alarm module comprises a control circuit and a buzzer alarm, when in detection, the pressure gauge 3 uploads the currently detected pressure data to the control circuit once every second, the control circuit receives and compares the received pressure data, when the pressure data which are different from each other are received four times in succession, the change of the readings of the pressure gauge is proved, and the large probability of non-mechanical error of the change of the readings is caused, at the moment, the control circuit sends an opening signal to the buzzer alarm, and the buzzer alarm alarms to remind the operators to check the readings of the corresponding pressure gauge 3, so that the workload of the operators in real-time tracking and recording is reduced.

In the self-checking process, the connecting ring also belongs to a part of the boundary of the large inner space, if the connecting ring is not tightly combined, gas leaks from the joint of the connecting ring, the accuracy of the self-checking is affected, in order to avoid the influence of the combined tightness of the connecting ring on the self-checking accuracy of the detecting device, the inside of the first connecting ring 25 with smaller diameter is provided with a fixed ring 27 with fixed diameter, the outside of the second connecting ring 26 with larger diameter is provided with a detachable locking ring 22, the locking ring 22 is of a ring structure with tightness adjusted through a bolt-nut structure, when the self-checking is needed, the second connecting ring 26 is sleeved on the outer surface of the first connecting ring 25, then the locking ring 22 is placed at the position of the second connecting ring 26 corresponding to the fixed ring 27, the nut of the locking ring 22 is screwed down, the diameter of the locking ring 22 is reduced and is tightly attached to the outer surface of the second connecting ring 26, the locking ring 22 and the fixed ring 27 clamp the joint of the first connecting ring 25 and the second connecting ring 26 from the inner side and outer side, so that the joint of the two connecting rings is tightly combined, and the probability of air leakage from the joint of the connecting ring is reduced.

In order to make the combination of the two connecting rings tighter, the outer surfaces of the connecting rings are provided with locking devices, the locking devices of the two connecting rings are mutually matched, in this embodiment, the outer surface of the first connecting ring 25 is provided with a groove, the corresponding position of the inner surface of the second connecting ring 26 is provided with a bump, and when the second connecting ring 26 is sleeved on the first connecting ring 25, the bump is embedded in the groove, so that the combination compactness of the two connecting rings is further improved.

In the above process, once the fixing ring 27 on the inner side is deformed, the bonding tightness of the two connecting rings is weakened, in order to reduce the deformation of the fixing ring 27, the fixing ring 27 is made of a high carbon steel material with higher hardness, in this embodiment, the fixing ring 27 is made of T7 steel, and the main mechanical properties of the T7 steel are as follows: the yield strength is 841MPa, the tensile strength is 962MPa, and compared with the common Q235 steel, the steel has higher hardness and smaller deformation space, and can better clamp the joint of the first connecting ring 25 and the second connecting ring 26 with the locking ring 22 from the inner side and the outer side.

In order to ensure the connection tightness of the sealing ring 24 and the two connecting rings, the sealing ring 24 and the connecting rings are made of rubber materials with sulfur content of 20-25%, and compared with common rubber, the rubber with higher sulfur content has higher hardness and is tightly attached to an attaching object.

In actual use, sometimes pipeline 1 to be measured is longer, need the operator to embolia pipeline 1 to be measured with detection ring 4 from pipeline one end this moment, make detection ring 4 transport to the detection position along pipeline 1 to be measured, required work load is great, in order to reduce operator's work load, detection ring 4 comprises two semi-rings, every semi-ring is equipped with five location chamber 41, every semi-ring one end articulates with the other side, the other end is equipped with connecting plate 42, all be equipped with the screw on two connecting plates 42, screw on two connecting plates 42 corresponds the setting, two connecting plates 42 pass through screw and screw detachable connection, when need set up detection ring 4 in one of them one side of pipeline 1 to be measured, first lift the screw off, then open two semi-rings along the hinge to the distance between two semi-rings be greater than pipeline 1 external diameter to be measured, then with detection ring 4 cover to the position department that needs to detect, rotate two semi-rings along the hinge to connecting plate 42 laminating, two screw holes coincide in its axial direction this moment, with the screw in the screw, can accomplish the installation on pipeline 1 to be measured, the operation process of operator is convenient.

The working principle and the using flow of the utility model are as follows:

when the automatic detection device is used, firstly, the two sealing covers 2 are connected in an airtight manner through the two connecting rings sleeved with each other, the inner spaces of the two sealing covers 2 are combined to form a large inner space, then a certain amount of air is filled into the large inner space through the air pump 23 on one sealing cover 2, then whether the reading changes of the pressure gauge 3 arranged on the two sealing covers 2 are observed, if the reading changes, the air in the large inner space can flow to the outer space, namely, the sealing ring 24 and the outer cover 21 are combined to be not tight or the outer cover 21 is provided with a leakage point, the air tightness of the detection device is insufficient, because the pressure gauge 3 uploads the pressure data obtained by current detection to the control circuit every second, the control circuit receives and compares the received pressure data, when the leakage leads the control circuit to continuously receiving the pressure data which are different from each other four times, the control circuit sends an opening signal to the buzzer alarm, and reminds an operator of the reading change, and if the reading does not change, the detection device is proved to have the air tightness, and the detection result is not affected.

Then, the air tightness of the pipeline is detected, two sealing covers 2 are placed at two side openings of the pipeline 1 to be detected, one ends of sealing rings 24 are aligned to the pipeline openings, after the sealing rings 24 are plugged into the pipeline openings, the rebound trend of the sealing rings 24 enables the outer surfaces of the sealing rings 24 to be abutted to the inner surfaces of the pipeline, the two ends of the pipeline are sealed by the sealing rings 24, screws in screw holes of the detecting rings 4 are detached firstly, then the two semi-rings are opened along hinges until the distance between the two semi-rings is larger than the outer diameter of the pipeline 1 to be detected, then the detecting rings 4 are sleeved to the position to be detected, the two semi-rings are rotated along the hinges to be attached to a connecting plate 42, at the moment, the two screw holes are overlapped in the axial direction, screws are screwed into the screw holes, the fixing of the detecting rings 4 on the pipeline is completed, then an air pump 23 arranged on the surface of the sealing rings 24 is operated to inflate the sealed pipeline, the air pressure in the pipeline is slightly larger than the atmospheric pressure, then whether the air pressure displayed by the pressure gauge 3 at the sealing covers 2 is changed or not is observed, if the pressure is not changed, the pressure in the pipeline is proved to be leaked, if the pressure in the pipeline is proved to be cracked, the pipeline is detected, the pressure is detected to be the pipeline is detected to be the pressure is detected, and the pipeline is detected to be the pressure is changed, if the pressure is detected to be the pipeline is detected, and the pressure is detected to be the pressure is changed, and is detected, and the pipeline is detected, and the pressure is detected, and the pressure is changed.

The present utility model is not limited to the above embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present utility model.

Claims

1. A detection device for detecting pipeline gas tightness, its characterized in that: the device comprises two sealing covers and a detection ring, wherein any one of the sealing covers comprises a sealing ring and an outer cover, one end of the sealing ring is connected with the outer cover, the two sealing covers are connected with two ends of a pipeline through the sealing ring, the inner surface of the detection ring is connected with the outer surface of the pipeline, a detection cavity is formed in the detection ring, the outer cover and the detection ring are both provided with pressure gauges, and an air pump is arranged on any one of the outer covers in a penetrating manner;

the sealing rings are respectively provided with a first connecting ring and a second connecting ring at one end far away from the outer cover, the outer diameter of the first connecting ring is equal to the inner diameter of the second connecting ring, and the sealing covers are in contact connection through the connecting rings.

2. A detection apparatus for detecting air tightness of a pipe according to claim 1, wherein: the detection cavity is internally provided with a plurality of positioning cavities in a surrounding mode, any positioning cavity is correspondingly provided with a pressure gauge, one end of any pressure gauge is communicated with the positioning cavity, and the other end of the pressure gauge is connected with the outer surface of the detection ring.

3. A detection apparatus for detecting air tightness of a pipe according to claim 1, wherein: any pressure gauge is electrically connected with an alarm module, and the pressure gauge controls the alarm module to send out an alarm signal.

4. A detection apparatus for detecting air tightness of a pipe according to claim 1, wherein: the outer surfaces of the two connecting rings are provided with locking devices, and the locking devices of the two sealing rings are mutually matched.

5. A detection apparatus for detecting air tightness of a pipe according to claim 1, wherein: the fixing assembly comprises a fixing ring and a locking ring, the fixing ring is arranged on the inner surface of the first connecting ring, and the locking ring is detachably connected with the outer surface of the second connecting ring.

6. A detection apparatus for detecting air tightness of a pipe according to claim 5, wherein: the fixing ring is made of high-carbon steel materials.

7. A detection apparatus for detecting air tightness of a pipe according to claim 1, wherein: the sealing ring and the connecting ring are both made of rubber materials with sulfur content of 20-25%.

8. A detection apparatus for detecting air tightness of a pipe according to claim 1, wherein: the detection ring is composed of two semi-rings, one ends of the two semi-rings are mutually hinged, and the other ends of the two semi-rings are detachably connected.