Micro-positive pressure leak detection device

Abstract

The invention relates to the technical field of leakage detection, and discloses a micro-positive pressure leakage detection device which is suitable for detecting whether a pipeline leaks or not and comprises a pressure source, a pressure supply pipeline and a leakage point detection assembly, the pressure source is connected with the pipeline through the pressure supply pipeline so as to introduce a pressure medium into the pipeline, and the pressure supply pipeline is provided with a pressure detection assembly. The pressure detection assembly is used for detecting the pressure change of the pressure supply pipeline, the leakage point detection assembly wraps the pipeline, and a plurality of storage sections suitable for storing pressure media can be formed between the leakage point detection assembly and the pipeline. Whether the pipeline leaks or not can be detected, leakage can be rapidly detected, and a leakage point can be positioned for maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of leakage detection, in particular to a micro-positive pressure leakage detection device, and further to a pipeline leakage point detection method. Background Art

[0002] The absorber with a tank separator is a chemical equipment, which is mainly used for the separation of gas-liquid system and the separation of absorbable gas from liquid. The principle is to increase the time that gas stays in liquid by increasing the volume of the tank and reducing the flow rate of liquid, thereby increasing the concentration of absorbable gas in liquid. During separation, the absorption liquid and gas are separated by the absorber with a tank separator, and the separated gas can be discharged, while the absorbed gas will remain in the absorption liquid, thus achieving the separation of gas-liquid system.

[0003] After long-term use, the pool separator pipe or supporting beam of the absorption tower may rupture due to material aging or external damage, resulting in leakage, or the connection may loosen under vibration. If the pool separator pipe is blocked, the internal pressure will increase and cause leakage.

[0004] In the related art, when a leak occurs in a pool separator pipe or a support beam, patching is performed, that is, the pool separator pipe or the support beam is checked one by one to find out the leak where the slurry enters the pipe and patch the pipe to seal the leak and ensure airtightness.

[0005] Regarding the above-mentioned related technologies, the use of pipeline patches does not remove the original anti-corrosion layer of the pool separator pipe, and the pool separator pipe or support beam is prone to form a composite structure of "carbon steel-scale-air-stainless steel", which is not convenient for subsequent maintenance. At the same time, because the outer lining stainless steel layer is made of steel plate rolls, there are many welds and there is no effective means for leak detection, which buries hidden dangers for long-term operation. Summary of the invention

[0006] The purpose of the present invention is to overcome the problem in the prior art that it is difficult to detect and locate leaks on a pool separator tube or a support beam, and to provide a micro-positive pressure leak detection device, which has the function of detecting whether there is a leak in the pool separator tube or a support beam and locating the leak by detecting pressure changes.

[0007] In order to achieve the above-mentioned objectives, the first aspect of the present invention provides a micro-positive pressure leak detection device, which is suitable for detecting whether a pipeline is leaking, and includes a pressure source, a pressure supply pipeline and a leak point detection component. The pressure source is connected to the pipeline via the pressure supply pipeline to introduce pressure medium into the pipeline. The pressure supply pipeline is provided with a pressure detection component to detect the pressure change of the pressure supply pipeline via the pressure detection component. The leak point detection component is coated on the pipeline and can form a plurality of storage sections suitable for storing pressure medium between the leak point detection component and the pipeline.

[0008] Preferably, the pressure source includes a gas generator and a main pressure gauge, the main pressure gauge is connected to the gas generator, and the output end of the gas generator is connected to the pressure supply pipeline.

[0009] Preferably, the gas generator is connected to a drain valve.

[0010] Preferably, the gas generator generates inert gas.

[0011] Preferably, the boost pressure range of the gas generator is 0.04-0.06Mpa.

[0012] Preferably, the pressure supply pipeline includes a main connecting pipe and several branch connecting pipes, one end of the main connecting pipe is connected to the output end of the gas generator, and the other end of the main connecting pipe is connected to several branch connecting pipes so as to be connected to the corresponding pipeline via each branch connecting pipe.

[0013] Preferably, the pressure detection assembly includes a main outlet ball valve, a one-way valve, several branch outlet ball valves and several branch pressure gauges, the main outlet ball valve and the one-way valve are both arranged on the main connecting pipe, and the main outlet ball valve is arranged on the side of the one-way valve close to the pressure source; each branch connecting pipe is provided with the branch outlet ball valve and the branch pressure gauge, and the branch outlet ball valve is arranged on the side of the pressure gauge close to the main connecting pipe.

[0014] Preferably, the leakage point detection assembly comprises a plurality of elastic tube sleeves, which are sleeved on the pipeline along the length direction of the pipeline, and adjacent elastic tube sleeves are fitted to each other.

[0015] Preferably, the leakage point detection assembly comprises an elastic sleeve and a plurality of hoops, wherein the elastic sleeve is sleeved on the pipeline, and the air storage space between the elastic sleeve and the pipeline is divided into a plurality of storage sections via the hoops.

[0016] The second aspect of the present invention provides a method for detecting pipeline leaks, which is implemented using the micro-positive pressure leak detection device described in the above technical solution, and includes the following steps: Opening the pressure source to introduce pressure medium into the pipeline through the pressure supply pipeline; It is detected whether the pressure medium exists in each storage segment, and based on whether the pressure medium exists in the storage segment, it is determined whether there is a leak at a position on the pipeline corresponding to the storage segment.

[0017] Through the above technical scheme, the micro-positive pressure leak detection device provided in the first aspect of the present invention, after the pressure source is turned on, the pressure source introduces pressure medium into the pipeline through the pressure supply pipeline, so that the pressure medium forms pressure after filling the pipeline, and then detects the pressure changes of the pipeline and the pressure supply pipeline through the pressure detection component to detect whether there is a leak, and when there is a leak, it can quickly determine which area on the pipeline has a leak through the leak point detection component, so as to facilitate timely leak plugging and maintenance.

[0018] The method for detecting pipeline leaks provided in the second aspect of the present invention, when there is a leak, since a number of storage sections suitable for storing pressure media are formed between the leak detection component and the pipeline, if there is pressure media in a certain storage section, it means that there is a leak at the position corresponding to the storage section on the pipeline, and the leak can be quickly detected and located, which is convenient for timely repair and helps to increase the service life of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the micro-positive pressure leak detection device in this application; Figure 2 It is a structural schematic diagram of the leakage detection component in the first embodiment of the present application; Figure 3 It is a structural diagram of the leakage detection component in the second embodiment of the present application.

[0020] Description of Reference Numerals 1. Pipeline; 2. Pressure source; 21. Gas generator; 22. Main pressure gauge; 3. Pressure supply pipeline; 31. Main connecting pipe; 32. Branch connecting pipe; 4. Pressure detection assembly; 41. Main outlet ball valve; 42. Check valve; 43. Branch outlet ball valve; 44. Branch pressure gauge; 5. Drain valve; 6. Leakage point detection assembly; 61. Elastic pipe sleeve; 62. Hoop. DETAILED DESCRIPTION

[0021] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or a connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be abutment, it can be the internal connection of two elements, or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] It should be understood that the directions or positional relationships indicated by the terms "outside", "inside", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] The present invention provides a micro positive pressure leak detection device, referring to Figure 1-Figure 3 , suitable for detecting whether a pipeline 1 such as a pool separator pipe and a hollow support beam is leaking, comprises a pressure source 2, a pressure supply pipeline 3 and a leakage point detection component 6, wherein the pressure supply pipeline 3 is connected between the pipeline 1 and the pressure source 2, and a pressure detection component 4 is also provided on the pressure supply pipeline 3, the pressure source 2 can inject pressure medium into the pipeline 1 through the pressure supply pipeline 3, when the pressure medium fills the pressure supply pipeline 3 and the pipeline 1, there is pressure in the pressure supply pipeline 3 and the pipeline 1, and then the pressure change of the pressure supply pipeline 3 is detected by the pressure detection component 4, so as to detect whether the pipeline 1 is leaking, which is convenient for quickly detecting whether the pipeline 1 is leaking, and timely maintenance can be carried out to ensure the long-term use of the pipeline 1.

[0025] Reference Figure 1 Specifically, the pressure source 2 includes a gas generator 21 and a main pressure gauge 22, wherein the output end of the gas generator 21 is connected to the input end of the pressure supply pipeline 3, and the main pressure gauge 22 is connected to the gas generator 21. By starting the gas generator 21, the gas can be filled into the pressure supply pipeline 3, and then filled into the pipeline 1 through the pressure supply pipeline 3. On the one hand, when the pressure supply pipeline 3 and the pipeline 1 are filled with gas, the pressure parameter of the pressure detection component 4 can be used to determine whether there is a leak in the pipeline 1 according to whether the pressure is released. On the other hand, using gas as a pressure medium can reduce the possibility of the pressure medium corroding the pressure supply pipeline 3 and the pipeline 1. If there is a leak, the gas will flow out from the inside of the pipeline 1 through the leak point to the outside, which can also reduce the situation where external substances flow into the pipeline 1 and cause backflow.

[0026] In order to improve the use effect of the gas generator 21, the gas generator 21 generates inert gas, and uses inert gas as the pressure medium. On the one hand, when the inert gas fills the pressure supply pipeline 3 and the pipeline 1, the inert gas can protect the inner wall of the pressure supply pipeline 3 and the pipeline 1, so as to reduce the corrosion and leakage of the carbon steel layer on the inner wall of the pressure supply pipeline 3 and the pipeline 1; on the other hand, when there is a leak on the pipeline 1, the inert gas can not only reduce the slurry flowing into the pipeline 1 and causing backflow, but also protect the pipeline 1 at the leak point, reducing the possibility of the leak point being corroded and expanded. At the same time, the boost pressure range of the gas generator 21 is limited to 0.04-0.06Mpa through the main pressure gauge 22, so that the gas generator 21 can ensure that the gas is filled with gas in the pressure supply pipeline 3 and the pipeline 1, while reducing the situation where the boost pressure of the gas generator 21 is too high, causing the pipeline 1 to have leaks or leaks.

[0027] Reference Figure 1 A drain valve 5 is connected to the gas generator 21. When dirt and moisture accumulate in the gas generator 21, the drain valve 5 is opened to allow the dirt and moisture in the gas generator 21 to flow out until they are completely drained. The dirt and moisture accumulated inside the gas generator 21 can be discharged to reduce the possibility of poor working efficiency or even damage of the gas generator 21.

[0028] Reference Figure 1 The pressure supply pipeline 3 is composed of a main connecting pipe 31 and a plurality of branch connecting pipes 32, wherein the main connecting pipe 31 is connected to the output end of the gas generator 21, and the plurality of branch connecting pipes 32 are connected to the end of the main connecting pipe 31 away from the gas generator 21, and the branch connecting pipes 32 are respectively connected to the pipeline 1. The gas generator 21 can inject the inert gas pressure medium into the main connecting pipe 31, and then the pressure medium is respectively introduced into the pipeline 1 through the branch connecting pipes 32, so that the micro-positive pressure leak detection device can simultaneously perform leak detection on multiple pipelines 1, thereby improving the detection efficiency.

[0029] Reference Figure 1 A pressure detection assembly 4 is arranged on the pressure supply pipeline 3. The pressure detection assembly 4 is composed of a main outlet ball valve 41, a one-way valve 42, a plurality of sub-outlet ball valves 43 and a plurality of sub-pressure gauges 44. The main outlet ball valve 41 and the one-way valve 42 are both arranged on the main connecting pipe 31, and the main outlet ball valve 41 is arranged on the side of the one-way valve 42 close to the pressure source 2. The one-way valve 42 can reduce the situation where gas or liquid backflow causes inaccurate detection or damage to the pressure source 2. The sub-outlet ball valve 43 and the sub-pressure gauge 44 correspond to the sub-connecting pipe 32. Each sub-connecting pipe 32 is provided with a corresponding sub-outlet ball valve 43 and sub-pressure gauge 44. The sub-outlet ball valve 43 is arranged between the sub-pressure gauge 44 and the main connecting pipe 31.

[0030] Reference Figure 1The pressure detection assembly 4 is suitable for cooperating with the pressure source 2 to detect whether the pipeline 1 is leaking. Specifically, the main outlet ball valve 41 is first opened to connect the main connecting pipe 31 between the gas generator 21 and the branch connecting pipe 32. Then, the branch outlet ball valve 43 is opened to connect the gas generator 21 with the pipeline 1 through the main connecting pipe 31 and the branch connecting pipe 32. Then, the gas generator 21 is started, and the pressure medium passes through the main connecting pipe 31 and the branch connecting pipe 32 in sequence and enters the pipeline 1. When the pressure medium flows stably, the pressure supply pipeline 3 and the pipeline 1 are pressurized. If there is no leakage in the pipeline 1, the readings of several sub-pressure gauges 44 are basically the same as those of the main pressure gauge 22. If a certain pipeline 1 leaks, the pressure medium leaks from the leaking point. At this time, the reading of the sub-pressure gauge 44 is smaller than that of the main pressure gauge 22, and it can be judged that there is a leak in the pipeline 1. In order to determine the pipeline 1 where the leak is located, the outlet ball valve 43 can be closed or opened in batches, so that some of the branch connecting pipes 32 are connected and other branch connecting pipes 32 are blocked. The leaking pipeline 1 can be detected by the elimination method, which is easy to operate and facilitates rapid detection and maintenance.

[0031] Reference Figure 2 , and also includes a leak detection component 6, which can locate the leak position of the leaking pipeline 1. In one embodiment of the present invention, the leak detection component 6 is composed of a plurality of elastic sleeves 61, which are sleeved on the outer wall of the pipeline 1 along the length direction of the pipeline 1. The two ends of the elastic sleeve 61 are tightly fitted on the outer wall of the pipeline 1, so that a storage section is formed between the elastic sleeve 61 and the pipeline 1, and adjacent elastic pipelines 1 are fitted with each other. When detecting the pipeline 1, if there is a leak on the pipeline 1, the pressure medium passes through the leak from the pipeline 1 and enters the storage section between the outer wall of the pipeline 1 and the inner wall of the elastic sleeve 61. At this time, the elastic sleeve 61 produces elastic deformation to make the storage section bulge, so that the location of the leak in the pipeline 1 can be determined. At the same time, the elastic sleeve 61 can reduce the situation where external substances enter the interior of the pipeline 1 from the leak, and protect the equipment as a whole.

[0032] Reference Figure 3In another embodiment of the present invention, the leak detection assembly 6 includes an elastic sleeve 61 and a plurality of hoops 62. The length of the elastic sleeve 61 is consistent with that of the pipeline 1. The elastic sleeve 61 is sleeved on the pipeline 1. The plurality of hoops 62 are sleeved on the elastic sleeve 61 at equal intervals along the length direction of the elastic sleeve 61. The hoop 62 presses the elastic sleeve 61 against the pipeline 1, so that a storage section is formed between the elastic sleeve 61 between two adjacent hoops 62 and the pipeline 1. Similarly, when detecting the pipeline 1, if there is a leak on the pipeline 1, the pressure medium passes through the leak and enters the storage section from the pipeline 1. At this time, the elastic sleeve 61 produces elastic deformation to make the storage section bulge, and the location of the leak in the pipeline 1 can be determined. Compared with the leakage detection assembly 6 composed of a plurality of elastic sleeves 61, in this embodiment, when the pipeline 1 does not leak, the elastic sleeve 61 can be used as a protective layer to protect the pipeline. When the pipeline 1 leaks, multiple hoops 62 can be added to locate it, or the hoops 62 can be added to use the "binary method" to quickly locate it, which can save costs. The "binary method" is to continuously divide the pipeline 1 with the shackle into two parts through the hoop 62, so that the two hoops 62 in the interval gradually approach the leakage point, and finally the leakage point is located.

[0033] In summary, a check valve of the present invention has the following advantages: when leak detection is performed on the pipeline 1, first open the main outlet ball valve 41 and the branch outlet ball valve 43, open the gas generator 21, and adjust the boost pressure range to 0.04-0.06Mpa through the main pressure gauge 22. The gas generator 21 passes the pressure medium into the pipeline 1 along the main connecting pipe 31 and through the branch connecting pipe 32. Then, read the reading of the partial pressure gauge 44 to determine whether there is a leak. The detection is convenient and fast. If there is a leak in the pipeline 1, open the branch outlet ball valve 43 in batches, and determine the pipeline 1 with a leak according to the reading of the partial pressure gauge 44. Then, observe whether there is a bulge on the elastic pipe sleeve 61 on the pipeline 1. The bulge is the location of the leak, which is convenient for quickly locating and repairing the leak to ensure the service life of the pipeline 1 and the long-term operation of the equipment as a whole.

[0034] The present invention also provides a method for detecting a leak in a pipeline 1, which is implemented using a micro-positive pressure leak detection device and comprises the following steps: Open the pressure source 2 to allow the pressure medium to flow into the pipeline 1 through the pressure supply pipeline 3; It is detected whether there is a pressure medium in each storage segment, and based on whether there is a pressure medium in the storage segment, it is determined whether there is a leak at a position on the pipeline 1 corresponding to the storage segment.

[0035] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0036] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0037] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A micro-positive pressure leak detection device, suitable for detecting whether a pipeline (1) is leaking, characterized in that: The invention comprises a pressure source (2), a pressure supply pipeline (3) and a leakage point detection component (6), wherein the pressure source (2) is connected to the pipeline (1) via the pressure supply pipeline (3) so as to introduce a pressure medium into the pipeline (1), the pressure supply pipeline (3) is provided with a pressure detection component (4) so ​​as to detect the pressure change of the pressure supply pipeline (3) via the pressure detection component (4), and the leakage point detection component (6) is coated on the pipeline (1) and can form a plurality of storage sections suitable for storing the pressure medium between the leakage point detection component (6) and the pipeline (1).

2. The micro-positive pressure leak detection device according to claim 1, characterized in that: The pressure source (2) comprises a gas generator (21) and a main pressure gauge (22); the main pressure gauge (22) is connected to the gas generator (21); and the output end of the gas generator (21) is connected to the pressure supply pipeline (3).

3. The micro-positive pressure leak detection device according to claim 2, characterized in that: The gas generator (21) is connected to a drain valve (5).

4. The micro-positive pressure leak detection device according to claim 2, characterized in that: The gas generator (21) generates inert gas.

5. The micro-positive pressure leak detection device according to claim 2, characterized in that: The boost pressure range of the gas generator (21) is 0.04-0.06 MPa.

6. The micro-positive pressure leak detection device according to claim 2, characterized in that: The pressure supply pipeline (3) comprises a main connecting pipe (31) and a plurality of branch connecting pipes (32), one end of the main connecting pipe (31) is connected to the output end of the gas generator (21), and the other end of the main connecting pipe (31) is connected to the plurality of branch connecting pipes (32) so as to be connected to the corresponding pipeline (1) via each branch connecting pipe (32).

7. The micro-positive pressure leak detection device according to claim 6, characterized in that: The pressure detection assembly (4) comprises a main outlet ball valve (41), a one-way valve (42), a plurality of branch outlet ball valves (43) and a plurality of branch pressure gauges (44); the main outlet ball valve (41) and the one-way valve (42) are both arranged on the main connecting pipe (31); the main outlet ball valve (41) is arranged on a side of the one-way valve (42) close to the pressure source (2); Each of the branch connecting pipes (32) is provided with the branch outlet ball valve (43) and the branch pressure gauge (44), and the branch outlet ball valve (43) is arranged on a side of the pressure gauge close to the main connecting pipe (31).

8. The micro-positive pressure leak detection device according to claim 6, characterized in that: The leakage point detection assembly (6) comprises a plurality of elastic tube sleeves (61), wherein the elastic tube sleeves (61) are sleeved on the pipeline (1) along the length direction of the pipeline, and adjacent elastic tube sleeves (61) are in contact with each other.

9. The micro-positive pressure leak detection device according to claim 6, characterized in that: The leak point detection assembly (6) comprises an elastic tube sleeve (61) and a plurality of hoops (62); the elastic tube sleeve (61) is sleeved on the pipeline (1), and the hoops (62) divide the gas storage space between the elastic tube sleeve (61) and the pipeline (1) into a plurality of storage sections.

10. A method for detecting pipeline leaks, implemented using the micro-positive pressure leak detection device according to any one of claims 1 to 9, characterized in that: The steps include: Opening the pressure source (2) to allow pressure medium to flow into the pipeline (1) via the pressure supply pipeline (3); Detecting whether the pressure medium exists in each storage segment, and judging whether there is a leak at a position on the pipeline (1) corresponding to the storage segment based on whether the pressure medium exists in the storage segment.

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