CN220918740U

CN220918740U - Leak detection device of tubular membrane assembly

Info

Publication number: CN220918740U
Application number: CN202322562572.6U
Authority: CN
Inventors: 徐俊晨; 何福海; 李宁; 魏齐; 杨楠
Original assignee: Risingsun Membrane Technology Beijing Co ltd
Current assignee: Risingsun Membrane Technology Beijing Co ltd
Priority date: 2023-09-20
Filing date: 2023-09-20
Publication date: 2024-05-10
Anticipated expiration: 2033-09-20

Abstract

The utility model discloses a leak detection device of a tubular membrane assembly, which relates to the technical field of membrane equipment. The output end of the air source is connected with the first water outlet of the tubular membrane assembly through an air inlet pipe, and a pressure regulating valve group is arranged on the air inlet pipe and used for reliably regulating the pressure of air output by the air source in multiple stages. The single-tube pressure gauge is communicated with the air inlet pipe and is positioned at the downstream of the pressure regulating valve group, so that the gas pressure of the gas source regulated by the pressure regulating valve group and then output can be reliably detected. The observation piece is used for setting up in the first end of tubular membrane subassembly, and the observation piece is for being prepared by transparent material to with the tubular piece of atmosphere intercommunication, the shutoff piece is used for shutoff in the second end of tubular membrane subassembly, realizes the shutoff to tubular membrane subassembly. During detection, ventilation is carried out in the tubular membrane assembly, then whether bubbles are generated in the liquid in the observation piece is observed, and the tubular membrane with the bubbles is the damaged and leaked tubular membrane.

Description

Leak detection device of tubular membrane assembly

Technical Field

The utility model relates to the technical field of membrane equipment, in particular to a leak detection device of a tubular membrane assembly.

Background

With the development of economy, urban population is rapidly increased and concentrated, and ground water sources are seriously deficient, so that the utilization of surface water is more and more extensive. However, the difficulty of utilizing surface water is gradually increased due to the fact that the membrane separation technology is easy to pollute industrial wastewater and domestic sewage. The tubular membrane component is used as novel semi-permeable membrane material separation equipment, is widely applied to the fields of drinking water treatment, industrial wastewater treatment, bio-pharmaceuticals, food and beverage and the like, realizes waste utilization and resource recovery, and achieves the aim of sustainable development.

The tubular membrane assembly consists of a plurality of thin-wall tubes, and semipermeable membranes are coated on the inner walls of the tubes to form separation membrane elements. A plurality of separation membrane elements are assembled in a module in a manner called a membrane module. The tubular membrane component can realize operations such as microfiltration, ultrafiltration, reverse osmosis, gas separation and the like. However, in the use process of the tubular membrane assembly, one or more tubular membranes may be damaged to generate damage and leakage, so that performance is reduced and an expected design effect cannot be achieved, the use effect and service life of the tubular membrane assembly are affected, and the replacement time and economic cost of the whole assembly are very high, so that the damaged tubular membranes are required to be accurately judged and blocked, and the stable operation of the tubular membrane assembly is ensured.

In the prior art, a transparent elbow and a tubular membrane assembly are connected together during testing, clear water is filled in the transparent elbow, then a pressure regulating meter is externally connected behind an air source, air enters the tubular membrane assembly from a water outlet of the tubular membrane assembly after pressure regulation, whether air bubbles are generated in the water in the transparent elbow or not is observed, the tubular membrane with the air bubbles is damaged and leaked, and then the tubular membrane is plugged at fixed points until no air bubbles are generated.

However, because the tubular membrane is relatively fragile, the requirement on the precision of the air pressure is extremely high in the leak detection test, and the tubular membrane is broken through due to the excessively high air pressure, so that secondary damage is caused; bubbles in the transparent elbow are not obvious or bubble-free when the air pressure is too low, and can not be identified, but the currently adopted barometer is relatively poor in precision and easy to damage, and is not easy to perceive in time after damage, so that secondary damage can be caused to the tubular membrane assembly, and unnecessary loss is caused.

Therefore, how to reduce the probability of secondary damage to the tubular membrane during the leak detection process is a technical problem to be solved by those skilled in the art.

Disclosure of utility model

Therefore, the utility model aims to provide a leak detection device of a tubular membrane assembly, so as to reduce the probability of secondary damage to a tubular membrane in the leak detection process.

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

A leak detection apparatus for a tubular membrane assembly, comprising:

The output end of the air source is connected with the first water producing port of the tubular membrane assembly through an air inlet pipe, and the air inlet pipe is provided with a pressure regulating valve group;

The single-tube pressure gauge is communicated with the air inlet pipe and positioned at the downstream of the pressure regulating valve group and is used for detecting the pressure of the air output by the air source;

The observing piece is a tubular piece which is made of transparent materials and communicated with the atmosphere and is used for being arranged at the first end of the tubular membrane assembly so as to observe the output position of bubbles;

And the blocking piece is used for blocking the second end of the tubular membrane assembly.

Optionally, in the leak detection device for a tubular membrane assembly, the observation member is a transparent elbow structure, one interface of the elbow structure is connected to the first end of the tubular membrane assembly, and the other interface extends towards a direction away from the ground and is communicated with the atmosphere.

Optionally, in the leak detection device of a tubular membrane assembly, the blocking member is an elbow structure, one interface of the elbow structure is connected to the second end of the tubular membrane assembly, the other interface extends towards a direction away from the ground, and the blocking member is internally used for filling liquid.

Optionally, in the leak detection device of a tubular membrane assembly, the second end of the tubular membrane assembly has a first copy interface, and the plugging piece includes:

The first end of the connecting part is provided with a second copy forest interface which is used for being connected with the first copy forest interface;

The plugging part is of a disc-shaped structure and is arranged at the second end of the connecting part.

Optionally, in the leak detection device of a tubular membrane assembly, the first water producing port is provided with an air pipe quick connector for connecting with the air inlet pipe;

Or, the outlet end of the air inlet pipe is connected with a transfer pipe joint, and one end of the transfer pipe joint is attached to the end face of the first water producing port and is used for being fastened and connected through a hoop.

Optionally, in the leak detection device of the tubular membrane assembly, the second water outlet of the tubular membrane assembly is used for plugging through a plug piece.

Optionally, in the leak detection device of a tubular membrane assembly, the pressure regulating valve group is a three-stage pressure regulating valve group.

Optionally, in the leak detection device of a tubular membrane assembly, the plugging piece and the observation piece are connected with the tubular membrane assembly in a sealing manner through a clamp sealing ring.

Optionally, in the leak detection device of a tubular membrane assembly, the air inlet pipe is provided with a check valve, and the check valve is located at the downstream of the pressure regulating valve group.

Optionally, in the leak detection device of the tubular membrane assembly, the structure of the observation piece and the structure of the plugging piece are the same or different.

The utility model provides a leak detection device of a tubular membrane assembly, which comprises an air source, a single-tube pressure gauge, an observation piece and a plugging piece. The output end of the air source is connected with the first water producing port of the tubular membrane assembly through the air inlet pipe so as to ventilate the tubular membrane assembly, and the air inlet pipe is provided with a pressure regulating valve group which is used for carrying out reliable multistage regulation on the pressure of the air output by the air source. The single-tube pressure gauge is communicated with the air inlet pipe and is positioned at the downstream of the pressure regulating valve group, and the single-tube pressure gauge is a liquid column pressure gauge which consists of a vertical tube and a container communicated with the vertical tube and in a certain proportion with the inner diameter of the container. The observation piece is used for setting up in the first end of tubular membrane subassembly, and the observation piece is for being prepared by transparent material to with the tubular piece of atmosphere intercommunication, the shutoff piece is used for shutoff in the second end of tubular membrane subassembly, realizes the shutoff to tubular membrane subassembly.

During detection, the observation piece and the blocking piece are respectively connected to two ends of the tubular membrane assembly, clear water or other detection liquid is poured into the observation piece, after the gas provided by the gas source is depressurized and stabilized through the pressure regulating valve group, the gas inlet pipe is communicated to the first water producing port to enable the gas to enter the tubular membrane assembly, then whether bubbles are generated in the liquid in the observation piece or not is observed, the tubular membrane with the bubbles is the tubular membrane with breakage and leakage, and then the tubular membrane can be blocked at fixed points until no bubbles are generated in the secondary leak detection.

Compared with the prior art, the leak detection device of the tubular membrane assembly has the advantages that the structure is simple, the operation is convenient, the leak points are positioned accurately, the pressure is regulated and controlled through the pressure regulating valve group, the adjustment is reliable and effective, the detection cost is low and accurate, when the single-tube pressure gauge fails or fails, the single-tube pressure gauge can be directly observed by leak detectors, and then the leakage detection device is replaced, the secondary damage of the tubular membrane caused by inaccurate pressure control due to instrument failure is avoided, the effective control of the gas pressure output by the gas source is realized through the combined use of the pressure regulating valve group and the single-tube pressure gauge, the probability of secondary damage to the tubular membrane in the leak detection process is reduced, and the leak detection effect of the tubular membrane assembly is ensured; in addition, the utility model adopts the quick-assembly structure to connect at each connecting part, thereby effectively improving the use efficiency and reducing the requirement on the use environment.

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 schematic diagram of a leak detection structure of a leak detection apparatus and a tubular membrane assembly according to an embodiment of the utility model.

Wherein 10 is an air source, 11 is an air inlet pipe, 20 is a pressure regulating valve group, 30 is a single-pipe pressure gauge, 40 is an observation piece, and 50 is a plugging piece;

60 is a tubular membrane assembly, 61 is a first water producing port, 62 is a second water producing port, 63 is an air pipe quick connector, and 64 is a plug piece.

Detailed Description

The utility model discloses a leak detection device of a tubular membrane assembly, which is used for reducing the probability of secondary damage to a tubular membrane in the leak detection process.

Hereinafter, embodiments will be described with reference to the drawings. Furthermore, the embodiments shown below do not limit the summary of the utility model described in the claims. The whole contents of the constitution shown in the following examples are not limited to the solution of the utility model described in the claims. It should be noted that, for convenience of description, only a portion related to the related application is shown in the drawings. Embodiments of the utility model and features of the embodiments may be combined with each other without conflict.

In order to enable the tubular membrane assembly to be used normally, the damaged tubular membrane needs to be replaced or leakage-detected and plugged in time, and the effluent quality of the ultrafiltration membrane is ensured to meet the design requirement. If the tubular membrane component is directly replaced when the damaged membrane core is less, larger waste is caused, so that the leak detection and plugging test of the membrane component is a necessary work.

Referring to fig. 1, a leak detection apparatus for a tubular membrane assembly according to an embodiment of the present utility model includes a gas source 10, a single tube pressure gauge 30, an observation member 40, and a blocking member 50. The output end of the air source 10 is used for being connected with the first water producing port 61 of the tubular membrane assembly 60 through the air inlet pipe 11 so as to ventilate the tubular membrane assembly 60, and the air inlet pipe 11 is provided with a pressure regulating valve group 20, and the pressure regulating valve group 20 is used for reliably regulating the pressure of the air output by the air source 10 in multiple stages. The single-tube pressure gauge 30 is communicated with the air inlet pipe 11 and is positioned at the downstream of the pressure regulating valve group 20, and the single-tube pressure gauge 30 is a liquid column pressure gauge consisting of a vertical tube and a container which is communicated with the vertical tube and is in a certain proportion with the inner diameter of the vertical tube, so that the single-tube pressure gauge has the advantages of accurate detection, low cost and easy ineffectiveness observation, and can reliably detect the gas pressure output after the gas source 10 is regulated by the pressure regulating valve group 20. The observation member 40 is configured to be disposed at a first end of the tubular membrane assembly 60, the observation member 40 is a tubular member made of a transparent material and in communication with the atmosphere, and the blocking member 50 is configured to block at a second end of the tubular membrane assembly 60, so as to block the tubular membrane assembly 60.

During detection, the observation piece 40 and the blocking piece 50 are connected to two ends of the tubular membrane assembly 60 respectively, the tubular membrane assembly 60 is horizontally placed according to the form shown in fig. 1, clear water or other detection liquid is poured into the observation piece 40, then the air inlet pipe 11 is communicated to the first water producing port 61, after the pressure of the air provided by the air source 10 is reduced and stabilized through the pressure regulating valve group 20, the air inlet pipe 11 is communicated to the first water producing port 61 to enable the air to enter the tubular membrane assembly 60, then whether bubbles are generated in the liquid in the observation piece 40 is observed, the tubular membrane with the bubbles is the tubular membrane with breakage and leakage, and then the tubular membrane can be blocked at fixed points until no bubbles are generated during the detection again.

Compared with the prior art, the leak detection device of the tubular membrane assembly disclosed by the embodiment of the utility model has the advantages that the structure is simple, the operation is convenient, the leak point positioning is accurate, the pressure regulation and control are realized through the pressure regulating valve group 20, the regulation is reliable and effective, the detection cost is lower and accurate, when the single-tube pressure gauge 30 fails or fails, the leak detection device can be directly observed by a leak detector, the leak detection device is further replaced, the secondary damage of the tubular membrane caused by inaccurate pressure control due to instrument failure is avoided, the effective control of the output gas pressure of the gas source 10 is realized through the combined use of the pressure regulating valve group 20 and the single-tube pressure gauge 30, the probability of secondary damage to the tubular membrane in the leak detection process is reduced, and the leak detection effect of the tubular membrane assembly 60 is ensured.

It should be noted that, compared with the manometer, the single-tube manometer 30 has lower cost and accurate indication, and is hardly damaged, and the characteristics of the single-tube manometer 30 after damage are more obvious, so that erroneous judgment does not exist, reliable monitoring effect on the output air pressure of the air source 10 can be ensured, and the specific structure and operation principle thereof are the prior art and are not repeated herein.

In an embodiment, the observation member 40 is a transparent elbow structure, one interface of the elbow structure is connected to the first end of the tubular membrane assembly 60, and the other interface extends towards the direction away from the ground and is communicated with the atmosphere, so as to realize liquid storage, after the detection liquid is introduced into the tubular membrane assembly 60, and the gas source 10 is introduced into the gas, if the tubular membrane leaks, bubbles are generated in the elbow structure, and the bubbles are discharged from the interface of the elbow structure and the atmosphere, and the specific position of the damaged tubular membrane can be judged by observing the output position of the bubbles.

The observation member 40 may be a tubular member having other shapes, so long as leakage of the liquid during the detection process is avoided.

In one embodiment, the blocking member 50 is also an elbow structure having one port connected to the second end of the tubular membrane assembly 60 and the other port extending away from the ground, and the blocking member 50 is filled with a liquid to achieve a liquid seal.

The plugging member 50, the observation member 40 and the tubular membrane assembly 60 are all in sealing connection through a clamp seal or a seal ring, so as to avoid liquid leakage at the joint of the plugging member 50, the observation member 40 and the tubular membrane assembly 60.

Further, the observation member 40 and the blocking member 50 have the same structure and are made of transparent materials, so that the blocking member 50 can also be used as an observation member for observing bubbles, and the leakage detection personnel can observe the bubble generation position more reliably. Typically, the viewing element 40 and the blocking element 50 are identical structural elements.

In a particular embodiment of the present disclosure, the second end of the tubular membrane assembly 60 has a first copy of the interface, and the occluding component 50 includes a connecting portion and an occluding portion. A second copying forest interface for connecting with the first copying forest interface is arranged at the first end of the connecting part, so that the tubular membrane assembly 60 and the blocking piece 50 can be quickly and hermetically connected through the copying forest interface; the blocking part is in a disc-shaped structure and is fixed at the second end of the connecting part through a copy Lin Jietou, so as to block the tubular membrane assembly 60.

Because the plugging piece 50 plays a role in plugging the tubular membrane assembly 60, the plugging piece can be designed into a flange end cover structure so as to be correspondingly connected with a flange structure at the second end of the tubular membrane assembly 60, specifically, the plugging piece 50 is a flange plugging piece and comprises a plugging disc body and a positioning block, the positioning block is an annular structure for positioning and embedding with a central round hole of the flange, a connecting hole for connecting with the flange is formed in the plugging disc body, the plugging piece 50 is detachably connected with the tubular membrane assembly 60 through a bolt, and the positioning block is arranged at one end of the plugging disc body.

The second end of the tubular membrane assembly 60 is typically a copy forest interface or sanitary quick connector to facilitate quick assembly and disassembly, improve service efficiency, and reduce environmental requirements.

Referring to fig. 1, a tubular membrane assembly 60 generally has two water producing ports, and a first water producing port 61 is provided with a quick air pipe connector 63 for connecting with an air inlet pipe 11, so as to form a quick assembly structure of the air inlet pipe and the quick air pipe connector 63, realize quick assembly and disassembly, and improve the use efficiency. The second water outlet 62 of the tubular membrane assembly 60 is configured to be plugged by a plug member 64 to prevent leakage during leak detection.

The plug member 64 is typically connected to the second nozzle 62 by a clamp seal or by a threaded standard.

In an embodiment, the outlet end of the air inlet pipe 11 is connected with a conversion pipe joint, and one end of the conversion pipe joint is attached to the end surface of the first water producing port 61 of the tubular membrane assembly 60 and is fastened and connected through a hoop.

The air inlet pipe 11, the observation member 40, the blocking member 50 and the plug member 64 are detachably connected with the tubular membrane assembly 60, and various specific connection modes can be selected according to actual requirements, such as clamping connection, threaded connection and the like.

In order to ensure the stability of the output pressure of the air source 10, the pressure regulating valve group 20 is a three-stage pressure regulating valve group, so that the output air pressure is regulated with high precision according to the requirement, the multistage pressure control is realized, the pressure regulation is more accurate through the mutual comparison of the data of the multistage pressure regulation, the output air pressure is more stable, the damage of any instrument in the pressure regulating valve group 20 does not influence the integral use effect of the leak detection device, and the probability of secondary damage to the tubular membrane assembly 60 in the leak detection process is further reduced.

The specific structure of the pressure regulating valve group 20 is a prior art, and will not be described herein.

In order to avoid backflow of the detection liquid from the air inlet pipe 11 during the disassembly and assembly of the leak detection device, a check valve is arranged on the air inlet pipe 11, and the check valve is arranged at the downstream of the pressure regulating valve group 20, specifically, can be arranged at the end part of the outlet end of the air inlet pipe 11.

The terms "first" and "second" and the like in the description and in the claims, are used for distinguishing between different objects and not for describing a particular sequential order and should not be construed as indicating or implying a relative importance or implicitly indicating the number of features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In addition, in the description of the embodiments of the present utility model, "plurality" means two or more than two.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A leak detection apparatus for a tubular membrane assembly, comprising:

The air source (10), the output end of the air source (10) is used for being connected with a first water producing port (61) of the tubular membrane assembly (60) through an air inlet pipe (11), and the air inlet pipe (11) is provided with a pressure regulating valve group (20);

A single-tube pressure gauge (30) which is communicated with the air inlet pipe (11) and is positioned at the downstream of the pressure regulating valve group (20) and is used for detecting the pressure of the output gas of the air source (10);

The observation piece (40), the observation piece (40) is a tubular piece made of transparent material and communicated with the atmosphere, and is used for being arranged at the first end of the tubular membrane assembly (60) so as to observe the output position of bubbles;

and the plugging piece (50) is used for plugging the second end of the tubular membrane assembly (60).

2. The leak detection apparatus as defined in claim 1, wherein the observation member (40) is a transparent elbow structure, one interface of the elbow structure being connected to the first end of the tubular membrane assembly (60), and the other interface extending in a direction away from the ground and being in communication with the atmosphere.

3. The leak detection apparatus as defined in claim 1, wherein the blocking member (50) is of an elbow configuration having one interface connected to the second end of the tubular membrane assembly (60) and the other interface extending away from the ground, and wherein the blocking member (50) is internally filled with a liquid.

4. The leak detection apparatus for a tubular membrane assembly as defined in claim 1, wherein the second end of the tubular membrane assembly (60) has a first copy interface, and wherein the closure member (50) comprises:

5. The leak detection apparatus of a tubular membrane assembly as claimed in claim 1, wherein the first water producing port (61) is provided with a quick air pipe fitting (63) for connection to the air inlet pipe (11);

Or, the outlet end of the air inlet pipe (11) is connected with a transfer pipe joint, and one end of the transfer pipe joint is attached to the end face of the first water producing port (61) and is used for being fastened and connected through a hoop.

6. A tubular membrane assembly leak detection apparatus as claimed in claim 1, wherein the second water outlet (62) of the tubular membrane assembly (60) is adapted to be plugged by a plug member (64).

7. The leak detection apparatus for a tubular membrane assembly as defined in any one of claims 1-6, wherein said pressure regulating valve train (20) is a three stage pressure regulating valve train.

8. A tubular membrane assembly leak detection apparatus as claimed in any one of claims 1 to 6, wherein the blocking member (50) and the observation member (40) are sealingly connected to the tubular membrane assembly (60) by a collar seal.

9. A leak detection apparatus for a tubular membrane assembly as claimed in any one of claims 1 to 6, characterized in that said inlet pipe (11) is provided with a non-return valve, said non-return valve being located downstream of said pressure regulating valve group (20).

10. A tubular membrane assembly leak detection apparatus as claimed in any one of claims 1 to 6, wherein the structure of the sight glass (40) and the plug (50) are the same or different.