A pressure testing device for tubular membrane leak detection

Abstract

The utility model relates to the technical field of tubular membrane testing device, disclose a kind of pressure testing device of tubular membrane leak detection, including detection cylinder, and the detection cylinder is fixedly connected with connecting pipe, the connecting pipe outside is provided with the sealing assembly for the sealing of connecting pipe and tubular membrane junction, the drainage pipe is fixedly connected in the detection cylinder front side, the left side surface of the detection cylinder is provided with through-hole, the left side inner wall of the detection cylinder is fixedly connected with waterproof glove, the right end of the waterproof glove is fixedly connected with insertion cylinder, and the insertion cylinder outside is provided with plugging piece. In the utility model, the cooperation of waterproof glove, insertion cylinder and plugging piece is set, so that the operator can insert the hand into waterproof glove through through-hole after discovering the membrane assembly of air leakage, without direct contact with detection liquid, and compared with using long rod type device, it is more handy, convenient to operate, greatly reduces the labor intensity and skill requirement of operator.

Description

Technical Field

[0001] This utility model relates to the technical field of tubular membrane testing devices, and in particular to a pressure testing device for leak detection of tubular membranes. Background Technology

[0002] As a highly efficient separation material, tubular membranes are widely used in filtration and separation processes in water treatment, food, pharmaceuticals, and chemicals. Before use or during regular maintenance, they require strict airtightness and integrity testing to ensure that the membrane module is undamaged and leak-free, thus guaranteeing separation efficiency and product quality. Currently, common leak detection methods often combine pressure testing with visual bubble observation. This involves immersing the membrane module in the test solution, applying pressure, and observing whether bubbles are generated to determine the location of the leak.

[0003] Existing tubular membrane leak detection pressure testing devices generally include a testing container for holding the test fluid and the tubular membrane, and a piping structure for connecting the tubular membrane to the pressure source. Some devices are equipped with sealing components to ensure the airtightness of the testing system. In actual operation, when a leak is detected in a membrane module, the operator needs to mark or temporarily seal the leak point to avoid the leak affecting the subsequent testing of other membrane modules. Currently, there are two common operating methods: one is for the operator to directly put their hand into the test fluid to perform the sealing operation; the other is to use a long rod-like tool to indirectly push the sealing component to deal with the leak point.

[0004] In practical use, the above-mentioned operating methods, where operators directly insert their hands into the detection fluid for sealing operations, while ensuring operational flexibility, result in direct contact between the hands and the detection fluid. If the detection fluid is corrosive or contaminating, it can cause injury to the operator's hands. While using long-handled tools avoids contact between the hands and the detection fluid, the operating precision of long-handled tools is lower, making it difficult to accurately target the leaking membrane module. Furthermore, the operation requires continuous control of the tool's balance and direction, increasing the operator's workload and placing higher demands on their operational skills. Therefore, a tubular membrane leak detection pressure testing device is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a pressure testing device for tubular membrane leak detection, which aims to solve the problem that existing leak detection devices lack a structure that can quickly and safely mark the membrane module for sealing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a pressure testing device for leak detection of tubular membranes, comprising a testing cylinder, a connecting pipe fixedly connected to the testing cylinder, a sealing component for sealing the connection between the connecting pipe and the tubular membrane provided on the outside of the connecting pipe, a drain pipe fixedly connected to the front side of the testing cylinder, a through hole opened on the left side surface of the testing cylinder, a waterproof glove fixedly connected to the left inner wall of the testing cylinder, an insert fixedly connected to the right end of the waterproof glove, and a sealing component provided on the outside of the insert for sealing the membrane assembly;

[0007] The sealing component includes a sealing plug inserted into the outside of the insert cylinder. From left to right, a limiting ring and a sealing rubber ring are fixedly connected to the outside of the sealing plug. An iron sheet is fixedly connected inside the sealing plug. A magnetic attraction component for magnetic attraction and limiting with the iron sheet is provided inside the insert cylinder.

[0008] As a further description of the above technical solution:

[0009] The sealing assembly includes a rubber ring fitted onto the end of the connecting pipe, and a clamp is provided on the outer side of the end of the connecting pipe.

[0010] As a further description of the above technical solution:

[0011] A valve is fixedly connected to the outside of the drain pipe.

[0012] As a further description of the above technical solution:

[0013] The magnetic assembly includes a magnetic block fitted inside the insert, a pull rod fixedly connected to the left side of the magnetic block, and a pull ring fixedly connected to the left end of the pull rod through the insert and the waterproof glove.

[0014] As a further description of the above technical solution:

[0015] A storage box for storing sealing components is fixedly connected to the left side of the detection cylinder.

[0016] As a further description of the above technical solution:

[0017] The waterproof glove is located directly to the right of the through-hole.

[0018] This utility model has the following beneficial effects:

[0019] 1. In this utility model, the combination of waterproof gloves, inserts, and sealing components allows operators to insert their hands through the through-hole into the waterproof gloves to operate after discovering a leaking membrane module, without directly contacting the detection liquid. This is more convenient and easier to operate than using long rod-type devices, greatly reducing the labor intensity and skill requirements of operators. At the same time, the diameter of the sealing plug is adapted to the membrane module, and the outer limiting ring can prevent the sealing plug from being completely inserted into the membrane module and difficult to pull out.

[0020] 2. In this utility model, the combination of the magnetic block, the pull rod and the pull ring can stably limit the sealing part to the outside of the tube, so as to prevent the sealing part from falling off when entering the detection liquid, which would affect the leak detection efficiency. At the same time, the limit can be quickly released by pulling the pull ring when needed, which is convenient for operation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall pressure testing device for tubular membrane leak detection proposed in this utility model;

[0022] Figure 2 This is a schematic diagram of the disassembled sealing assembly of a pressure testing device for tubular membrane leak detection proposed in this utility model.

[0023] Figure 3 This is a schematic diagram showing the disassembled waterproof gloves and sealing components of the pressure testing device for tubular membrane leak detection proposed in this utility model.

[0024] Figure 4 This is a schematic cross-sectional view of the top portion of the waterproof glove and sealing component of the pressure testing device for tubular membrane leak detection proposed in this utility model.

[0025] Figure 5 This is a schematic diagram of the sealing component of a pressure testing device for tubular membrane leak detection proposed in this utility model;

[0026] Figure 6 This utility model proposes a pressure testing device for tubular membrane leak detection. Figure 4 A schematic diagram of part A.

[0027] Legend:

[0028] 1. Detection cylinder; 2. Connecting pipe; 3. Sealing assembly; 31. Rubber ring; 32. Clamp; 4. Drain pipe; 5. Through hole; 6. Waterproof glove; 7. Insert; 8. Sealing component; 81. Sealing plug; 82. Limiting ring; 83. Sealing rubber ring; 84. Iron sheet; 9. Magnetic assembly; 91. Magnetic block; 92. Pull rod; 93. Pull ring; 10. Storage box. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Reference Figures 1-3 This utility model provides an embodiment of a pressure testing device for leak detection of a tubular membrane, comprising a detection cylinder 1, a connecting pipe 2 fixedly connected to the detection cylinder 1, the diameter of the connecting pipe 2 being the same as the diameter of the inlet and outlet of the tubular membrane, a sealing component 3 for sealing the connection between the connecting pipe 2 and the tubular membrane being provided on the outside of the connecting pipe 2, the sealing component 3 including a rubber ring 31 sleeved on the end of the connecting pipe 2, and a clamp 32 provided on the outside of the end of the connecting pipe 2, the rubber ring 31 being sleeved on the outside of the connection between the connecting pipe 2 and the tubular membrane, and then the connection can be further limited by the clamp 32 in conjunction with bolts, thereby improving the sealing and stability of the connection, a drain pipe 4 fixedly connected to the front side of the detection cylinder 1, a valve fixedly connected to the outside of the drain pipe 4, the valve being able to control the opening and closing of the drain pipe 4, the detection liquid inside the detection cylinder 1 being discharged through the drain pipe 4, and the drain pipe 4 being able to be connected to a liquid storage container.

[0031] A through hole 5 is provided on the left side surface of the detection cylinder 1. A waterproof glove 6 is fixedly connected to the inner wall of the left side of the detection cylinder 1. The waterproof glove 6 is located directly to the right of the through hole 5. The testing personnel can insert their hands through the through hole 5 into the waterproof glove 6 to perform operations without direct contact with the testing liquid. At the same time, it is more convenient to operate by directly using the waterproof glove 6 than using a long rod-like device. A tube 7 is fixedly connected to the right end of the waterproof glove 6. A sealing element 8 is provided on the outside of the tube 7. The sealing element 8 is used to seal the membrane module. A storage box 10 for storing the sealing element 8 is fixedly connected to the left side of the detection cylinder 1. The operator can directly take the sealing element 8 from the storage box 10.

[0032] Reference Figures 3-5 The sealing component 8 includes a sealing plug 81 inserted into the outside of the insert 7. The diameter of the sealing plug 81 is adapted to the diameter of the membrane module. From left to right, a limiting ring 82 and a sealing rubber ring 83 are fixedly connected to the outside of the sealing plug 81. The diameter of the limiting ring 82 is larger than that of the sealing plug 81, which can prevent the sealing plug 81 from being completely inserted into the membrane module and thus difficult to pull out. The sealing rubber ring 83 can fill the gap between the sealing plug 81 and the inner wall of the membrane module to improve the sealing performance and reduce the impact of air leakage on subsequent testing. An iron sheet 84 is fixedly connected inside the sealing plug 81. A magnetic attraction component 9 is provided inside the insert 7 for magnetic attraction and limiting with the iron sheet 84.

[0033] After connecting the inlet and outlet of the tubular membrane with this device and sealing the connection with the sealing component 3, one of the product outlets of the tubular membrane is sealed with a blind flange, and the other product outlet is blocked with a blind flange with an air inlet. Detection liquid is added into the detection cylinder 1 until it covers the top of the connecting pipe 2. Then, the blind flange with the air inlet can be connected to the air source with pressure detection to complete the air intake. If air bubbles are generated at the membrane module, it indicates that the membrane module is damaged. At this time, the tester can put his hand into the waterproof glove 6 and operate the waterproof glove 6 to move the insertion cylinder 7 away from the detection liquid. Then, the sealing component 8 is inserted into the outside of the insertion cylinder 7. The operator can then operate the waterproof glove 6 to insert the sealing component 8 into the membrane module for marking and sealing.

[0034] Reference Figure 4 and Figure 6 The magnetic component 9 includes a magnetic block 91 fitted inside the insert 7. The magnetic block 91 can magnetically attract and limit the iron sheet 84 through the insert 7, and stably limit the sealing component 8 to the outside of the insert 7, so as to prevent the sealing component 8 from falling off when it is moved into the detection liquid, which would affect the leak detection efficiency. A pull rod 92 is fixedly connected to the left side of the magnetic block 91. The left end of the pull rod 92 passes through the insert 7 and the waterproof glove 6 and is fixedly connected to a pull ring 93. The operator can hook the pull ring 93 with his finger and pull it quickly, so that the magnetic block 91 can be moved into the waterproof glove 6 through the pull rod 92, thereby quickly releasing the limitation between the iron sheet 84 and the sealing component 81, and avoiding affecting the separation between the sealing component 8 and the insert 7.

[0035] Working principle: Connect the inlet and outlet of the tubular membrane to the connecting pipes 2 of the two test tubes 1 respectively. Then, put the rubber ring 31 on the outside of the connection and tighten it with the clamp 32 and bolts to achieve a sealed and fixed connection. Then, use a blind plate to seal one of the product outlets of the tubular membrane and use a blind plate with an air inlet to block the other product outlet.

[0036] Inject test liquid into test cylinder 1 until the liquid level completely covers all membrane modules and is higher than the top of connecting pipe 2. Then connect the air source pipe to the blind plate with air inlet and slowly introduce compressed air into the entire tubular membrane system and pressurize it to the preset test pressure. Keep the pressure stable and the operator carefully observes the entire tubular membrane immersed in the test liquid. If a membrane module is damaged, continuous bubbles will be generated from that point and rise to the liquid surface. Once the leak point where bubbles are generated is found, proceed to the next step of marking and sealing process.

[0037] When marking and sealing are required, the operator inserts one hand into a waterproof glove 6 through the through hole 5 on the left side of the detection cylinder 1. In the water, the operator manipulates the insertion cylinder 7 through the waterproof glove 6 to move it out of the liquid. A sealing component 8 is taken, and the sealing plug 81 at the front end of the sealing component 8 is aligned with the port of the insertion cylinder 7. Due to the magnetic force of the magnetic block 91, the iron sheet 84 inside the sealing component 8 will be firmly attracted, making the sealing component 8 stably connected to the insertion cylinder 7. Then, holding the insertion cylinder 7, the operator precisely moves the attracted sealing component 8 to the leaking membrane assembly that is bubbling. The sealing plug 81 is inserted into the hole of the membrane assembly, and the sealing rubber ring 83 is used to seal the leak. Then, the operator can hook the pull ring 93 with their finger and pull it outward. The pull rod 92 pulls the magnetic block 91 inside away from the iron sheet 84, and the magnetic force disappears instantly. At this time, the insertion cylinder 7 is gently removed, and the sealing component 8 remains in the membrane assembly, completing the marking and sealing of the leak point. Then, the operator can continue to detect and seal the next leak point.

[0038] After all leaks have been dealt with, shut off the gas supply, release the internal pressure of the membrane, open the valve on drain pipe 4 to drain the test liquid into the storage container, disassemble the connection between the device and the tubular membrane, remove the tubular membrane, and the membrane module marked by the sealing component 8 can be repaired or recorded later.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pressure testing device for tubular membrane leak detection, comprising a detection cylinder (1), characterized in that: A connecting pipe (2) is fixedly connected to the detection cylinder (1). A sealing component (3) for sealing the connection between the connecting pipe (2) and the tubular membrane is provided on the outside of the connecting pipe (2). A drain pipe (4) is fixedly connected to the front side of the detection cylinder (1). A through hole (5) is opened on the left side surface of the detection cylinder (1). A waterproof glove (6) is fixedly connected to the left inner wall of the detection cylinder (1). A tube (7) is fixedly connected to the right end of the waterproof glove (6). A sealing component (8) is provided on the outside of the tube (7). The sealing component (8) is used to seal the membrane assembly. The sealing component (8) includes a sealing plug (81) inserted into the outside of the insert (7). From left to right, a limiting ring (82) and a sealing rubber ring (83) are fixedly connected to the outside of the sealing plug (81). An iron sheet (84) is fixedly connected inside the sealing plug (81). A magnetic attraction component (9) for magnetic attraction and limiting with the iron sheet (84) is provided inside the insert (7).

2. The pressure testing device for tubular membrane leak detection according to claim 1, characterized in that: The sealing assembly (3) includes a rubber ring (31) fitted onto the end of the connecting pipe (2), and a clamp (32) is provided on the outside of the end of the connecting pipe (2).

3. The pressure testing device for tubular membrane leak detection according to claim 1, characterized in that: A valve is fixedly connected to the outside of the drain pipe (4).

4. The pressure testing device for tubular membrane leak detection according to claim 1, characterized in that: The magnetic assembly (9) includes a magnetic block (91) fitted inside the insert (7). A pull rod (92) is fixedly connected to the left side of the magnetic block (91). The left end of the pull rod (92) passes through the insert (7) and the waterproof glove (6) and is fixedly connected to a pull ring (93).

5. The pressure testing device for tubular membrane leak detection according to claim 1, characterized in that: A storage box (10) for storing the sealing component (8) is fixedly connected to the left side of the detection cylinder (1).

6. The pressure testing device for tubular membrane leak detection according to claim 1, characterized in that: The waterproof glove (6) is located to the right of the through hole (5).

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