Hollow ultrafiltration membrane air tightness detection device

Abstract

The application relates to the technical field of air tightness detection, and discloses a hollow ultrafiltration membrane air tightness detection device, which comprises a gas guide pipe and a bottom plate, the two ends of the gas guide pipe are respectively provided with an ultrafiltration membrane pipe and a rotating head, an upper connecting structure is arranged between the ultrafiltration membrane pipe and one end of the gas guide pipe, the other end of the ultrafiltration membrane pipe is provided with a lower connecting structure, the outer surface of the rotating head is movably connected with an air outlet pipe, an observation assembly is arranged between the air outlet pipe and the rotating head, the upper connecting structure comprises a fixed block fixedly connected to one end of the gas guide pipe, a guide groove is formed in the lower end of the outer surface of the fixed block, a reset spring is arranged in the guide groove, and the lower end of the reset spring is connected with a movable head. Through the technical scheme, the existing hollow ultrafiltration membrane air tightness detection device realizes the connection between the ultrafiltration membrane pipe and the detection pipeline through a slide rail and a connecting head, so that the air tightness is detected; however, the slide rail and other means increase the energy consumption of the equipment, cause energy waste during detection, and are not energy-saving.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air tightness detection, in particular to a hollow ultrafiltration membrane air tightness detection device. BACKGROUND

[0002] The hollow ultrafiltration membrane is an ultrafiltration membrane made of hollow fiber material. It is the most mature and advanced technology in ultrafiltration technology. Through the filtration of the hollow ultrafiltration membrane, the water quality can be made more clean, and it is widely used in water purification and other industries, such as the filter core in household water purifiers. The purification of the ultrafiltration membrane can make the water source meet the direct drinking standard.

[0003] The existing patent discloses a hollow fiber ultrafiltration membrane filament air detection device (authorized publication number: CN210934492U). The device is designed reasonably and has a simple structure. The conversion method is used to intuitively show the air tightness of the device.

[0004] However, the above-mentioned patent and the existing hollow ultrafiltration membrane air tightness detection device still have some deficiencies. The existing hollow ultrafiltration membrane air tightness detection device connects the ultrafiltration membrane tube and the detection pipeline through a sliding rail and a connecting head, so as to detect the air tightness. However, the use of sliding rails and other means will increase the energy consumption of the equipment, causing energy waste during detection, and is not energy-saving. Therefore, we propose a hollow ultrafiltration membrane air tightness detection device. SUMMARY

[0005] The present application provides a hollow ultrafiltration membrane air tightness detection device, which solves the problem of the existing hollow ultrafiltration membrane air tightness detection device in the related art, which connects the ultrafiltration membrane tube and the detection pipeline through a sliding rail and a connecting head, so as to detect the air tightness. However, the use of sliding rails and other means will increase the energy consumption of the equipment, causing energy waste during detection, and is not energy-saving.

[0006] The technical scheme of the present application is as follows:

[0007] The hollow ultrafiltration membrane air tightness detection device comprises a gas guide pipe and a bottom plate, the two ends of the gas guide pipe are respectively provided with an ultrafiltration membrane tube and a rotating head, an upper connecting structure is arranged between the ultrafiltration membrane tube and one end of the gas guide pipe, the other end of the ultrafiltration membrane tube is provided with a lower connecting structure, the outer surface of the rotating head is movably connected with an air outlet pipe, and an observation assembly is arranged between the air outlet pipe and the rotating head.

[0008] The upper connecting structure comprises a fixed block fixedly connected to one end of the air guide pipe, a guide groove is formed in the outer surface of the lower end of the fixed block, a reset spring is arranged in the guide groove, an active head is connected to the lower end of the reset spring, a baffle is fixedly connected to the inner surface of the active head close to the lower end, a through hole is formed in the outer surface of the baffle, an adapter groove is formed in the outer surface of the lower end of the active head, a first spring is arranged in the adapter groove, and a first movable ring is connected to the lower end of the first spring.

[0009] As a further technical scheme of the present application, the lower connecting structure comprises a fixed column fixedly connected to the outer surface of the bottom plate, a recessed groove is formed in the outer surface of the upper end of the fixed column, a second spring is arranged in the recessed groove, a second movable ring is connected to the upper end of the second spring, a positioning support is fixedly connected to the upper end of the fixed column, and a positioning ring is fixedly connected to the upper end of the positioning support.

[0010] As a further technical scheme of the present application, the observation assembly comprises a water storage frame fixedly connected to the outer surface of the air outlet pipe, a water solution is arranged in the cavity formed by the water storage frame, the air outlet pipe and the rotating head, and a floating plate is arranged at the upper end of the water solution.

[0011] As a further technical scheme of the present application, the active head is in sliding connection with the fixed block and the air guide pipe, the two end head parts of the reset spring are fixedly connected with the fixed block and the active head respectively, and the lower end opening of the active head is closed by the baffle.

[0012] As a further technical scheme of the present application, the aperture of the through hole is smaller than the aperture of the air guide pipe, the active head is moved downward by the blowing of the airflow to realize the connection between the active head and the upper end of the ultrafiltration membrane tube, the upper end of the ultrafiltration membrane tube is matched with the lower end of the active head, the two end head parts of the first spring are fixedly connected with the adapter groove and the first movable ring respectively, the first movable ring is in sliding connection with the active head, the first movable ring and the convex ring are both made of elastic rubber material, and the number of the convex rings is three and they are arrayed.

[0013] As a further technical scheme of the present application, the inner diameter of the positioning ring is equal to the outer diameter of the ultrafiltration membrane tube, the recessed groove is matched with the lower end of the ultrafiltration membrane tube, and the number of the positioning supports is three and they are annularly arrayed.

[0014] As a further technical scheme of the present application, the second movable ring is in sliding connection with the fixed column, and the two end head parts of the second spring are fixedly connected with the second movable ring and the fixed column respectively.

[0015] As a further technical scheme of the present application, the water storage frame is fixedly connected with the air outlet pipe by welding, and waterproof paint is arranged at the connecting position of the water storage frame and the air outlet pipe.

[0016] As a further technical scheme of the present application, the upper end of the water solution exceeds the joint position between the rotating head and the air outlet pipe, whether the connecting position of the air guide pipe and the air outlet pipe leaks is judged by whether bubbles in the water solution come out upward, the evaporation of the water solution is reduced by the floating plate, and the installation of the floating plate in the water storage frame is facilitated by the installation opening.

[0017] As a further technical scheme of the present application, an air pump is arranged between the bottom plate and the air outlet pipe, an air inlet pipe is arranged on the outer surface of the air pump, an air pressure valve and a pressure gauge are respectively connected to the outer surface of the air guide pipe, a support frame is arranged between the air guide pipe and the bottom plate, the air pressure valve is used to adjust the air pressure blown into the air guide pipe by the air pump, and the pressure gauge is used to directly observe the air pressure in the air guide pipe, so as to judge the air tightness of the ultrafiltration membrane tube.

[0018] The working principle and beneficial effects of the present application are as follows:

[0019] In the present application, the upper end of the movable head and the upper end of the ultrafiltration membrane tube are sealed and connected under the flow of gas in the air guide pipe, so that the air tightness of the ultrafiltration membrane tube is judged, an additional power source is not needed to connect one end of the air guide pipe with one end of the ultrafiltration membrane tube, energy consumption is reduced, and the device is more energy-saving. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0021] Figure 1 The present application is a structural schematic diagram;

[0022] Figure 2 The present application is a partial structural schematic diagram of disassembly and installation of the ultrafiltration membrane tube;

[0023] Figure 3 The present application is a partial structural schematic diagram of the present application; Figure 2

[0024] Figure 4 The present application is a partial structural schematic diagram of the present application;

[0025] Figure 5 The present application is a partial structural schematic diagram of the present application;

[0026] Figure 6 The present application is a partial structural schematic diagram of the present application;

[0027] ​Figure 7 This is a partial frontal sectional view of the observation component of the present invention.

[0028] In the diagram: 1. Gas delivery tube; 2. Ultrafiltration membrane tube;

[0029] 3. Upper connecting structure; 31. Fixing block; 32. Guide groove; 33. Return spring; 34. Moving head; 35. Baffle; 36. Through hole; 37. Connecting groove; 38. Spring No. 1; 39. Moving ring No. 1; 310. Protruding ring;

[0030] 4. Lower connecting structure; 41. Fixed post; 42. Recessed groove; 43. No. 2 spring; 44. No. 2 movable ring; 45. Positioning bracket; 46. Positioning ring;

[0031] 5. Air outlet pipe;

[0032] 6. Observation components; 61. Water storage frame; 62. Float; 63. Mounting port; 64. Aqueous solution;

[0033] 7. Air inlet pipe; 8. Air pump; 9. Base plate; 10. Air pressure valve; 11. Pressure gauge; 12. Support frame; 13. Rotating head. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. Example

[0035] like Figures 1-2 As shown, this embodiment proposes a hollow ultrafiltration membrane airtightness testing device, including an air guide tube 1 and a base plate 9. An ultrafiltration membrane tube 2 and a rotating head 13 are respectively installed at both ends of the air guide tube 1. An upper connecting structure 3 is provided between one end of the ultrafiltration membrane tube 2 and the air guide tube 1, and a lower connecting structure 4 is provided at the other end of the ultrafiltration membrane tube 2. An air outlet pipe 5 is movably connected to the outer surface of the rotating head 13. An observation component 6 is provided between the air outlet pipe 5 and the rotating head 13. An air pump 8 is provided between the base plate 9 and the air outlet pipe 5. An air inlet pipe 7 is provided on the outer surface of the air pump 8. A pressure valve 10 and a pressure gauge 11 are respectively connected to the outer surface of the air guide tube 1. A support frame 12 is provided between the air guide tube 1 and the base plate 9. The pressure valve 10 is used to adjust the air pressure blown into the air guide tube 1 by the air pump 8, and the pressure gauge 11 is used to visually observe the air pressure inside the air guide tube 1, thereby determining the airtightness of the ultrafiltration membrane tube 2. Example

[0036] like Figures 3-4As shown, on the basis of example 1, it is also proposed that the upper connecting structure 3 comprises a fixed block 31 fixedly connected to one end of the air guide pipe 1, a guide groove 32 is opened on the outer surface of the lower end of the fixed block 31, a reset spring 33 is arranged inside the guide groove 32, an active head 34 is connected to the lower end of the reset spring 33, a baffle 35 is fixedly connected to the inside of the active head 34 close to the lower end, a through hole 36 is opened on the outer surface of the baffle 35, an adapter groove 37 is opened on the outer surface of the lower end of the active head 34, a No. 1 spring 38 is arranged inside the adapter groove 37, a No. 1 movable ring 39 is connected to the lower end of the No. 1 spring 38, a convex ring 310 is fixedly connected to the outer surface of the inner wall of the active head 34 corresponding to the adapter groove 37, the active head 34 is slidingly connected with the fixed block 31 and the air guide pipe 1, the both end head parts of the reset spring 33 are fixedly connected with the fixed block 31 and the active head 34 respectively, the lower end opening of the active head 34 is closed by the baffle 35, the aperture of the through hole 36 is smaller than the aperture of the air guide pipe 1, the active head 34 is moved downward by the blowing of the airflow, the connection between the active head 34 and the upper end of the ultrafiltration membrane tube 2 is realized, the upper end of the ultrafiltration membrane tube 2 is matched with the lower end of the active head 34, the both end head parts of the No. 1 spring 38 are fixedly connected with the adapter groove 37 and the No. 1 movable ring 39 respectively, the No. 1 movable ring 39 is slidingly connected with the active head 34, the No. 1 movable ring 39 and the convex ring 310 are both of elastic rubber material, the number of the convex ring 310 is three groups and is arrayed, the active head 34 and the upper end of the ultrafiltration membrane tube 2 can be sealed and connected under the gas flow in the air guide pipe 1 during use, so as to judge the air tightness of the ultrafiltration membrane tube 2, the one end of the air guide pipe 1 is connected with the one end of the ultrafiltration membrane tube 2 without increasing additional power source, the energy consumption can be reduced, and the device is more energy-saving. Embodiment

[0037] As Figure 5 shown, on the basis of example 1, it is also proposed that the lower connecting structure 4 comprises a fixed column 41 fixedly connected to the outer surface of the bottom plate 9, a recessed groove 42 is opened on the outer surface of the upper end of the fixed column 41, a No. 2 spring 43 is arranged inside the recessed groove 42, a No. 2 movable ring 44 is connected to the upper end of the No. 2 spring 43, a positioning support 45 is fixedly connected to the upper end of the fixed column 41, a positioning ring 46 is fixedly connected to the upper end of the positioning support 45, the inner diameter of the positioning ring 46 is equal to the outer diameter of the ultrafiltration membrane tube 2, the recessed groove 42 is matched with the lower end of the ultrafiltration membrane tube 2, the number of the positioning support 45 is three groups and is annularly arrayed, the No. 2 movable ring 44 is slidingly connected with the fixed column 41, the both end head parts of the No. 2 spring 43 are fixedly connected with the No. 2 movable ring 44 and the fixed column 41 respectively, the positioning detection of the ultrafiltration membrane tube 2 on the equipment can be facilitated during use, and the both ends of the ultrafiltration membrane tube 2 can be quickly closed by cooperating with the upper connecting structure 3, so as to detect the air tightness of the ultrafiltration membrane tube 2. Embodiment

[0038] As Figures 6-7 shown, on the basis of example 1, it is also proposed that the observation assembly 6 includes a water storage frame 61 fixedly connected to the outer surface of the air outlet pipe 5, the water storage frame 61 is provided with a water solution 64 in the cavity formed by the air outlet pipe 5 and the rotating head 13, the upper end of the water solution 64 is provided with a floating plate 62, the outer surface of the floating plate 62 is provided with a mounting hole 63, the water storage frame 61 is fixedly connected between the air outlet pipe 5 by welding, and the connection between the water storage frame 61 and the air outlet pipe 5 is provided with waterproof paint, the floating plate 62 is an elastic material with buoyancy, the upper end of the water solution 64 exceeds the joint between the rotating head 13 and the air outlet pipe 5, whether there is air leakage at the connection between the air guide pipe 1 and the air outlet pipe 5 is judged by whether there is air bubble rising upwards in the water solution 64, the evaporation of the water solution 64 is reduced by the action of the floating plate 62, the installation of the floating plate 62 in the water storage frame 61 is facilitated through the mounting hole 63, and the user can intuitively observe whether there is air bubble in the water solution 64 in the water storage frame 61 during use, so that it can be more intuitive to observe whether there is air leakage at the connection between the air outlet pipe 5 and the rotating head 13, and the user can be reminded to timely handle the air leakage at the connection of the air guide pipe 1 close to the air outlet pipe 5.

[0039] In summary, in the process of use, when it is necessary to detect the air tightness of the ultrafiltration membrane tube 2, the user can put the lower end of the ultrafiltration membrane tube 2 into the inside of the positioning ring 46, so that the lower end of the ultrafiltration membrane tube 2 is placed at the recessed groove 42, and then start the air pump 8, the air pump 8 sucks the external gas from the end of the air inlet pipe 7, so that the gas flow flows from one end of the air outlet pipe 5 into the air guide pipe 1, and the gas flow is delivered to the inside of the upper connecting structure 3 through the air guide pipe 1, at this time the gas flow blows out from the through hole 36 on the outer surface of the baffle 35, the through hole 36 is pushed by the gas flow and moves downward together with the movable head 34, at this time the movable head 34 moves downward and stretches the reset spring 33 to expand, until the joint groove 37 at the lower end of the movable head 34 is clamped into the upper end of the ultrafiltration membrane tube 2, at this time the first movable ring 39 moves upward and squeezes the first spring 38 to produce a certain contraction, at the same time the outer surface of the convex ring 310 contacts with the outer surface of the ultrafiltration membrane tube 2, and the two form a line contact, the convex ring 310 with elasticity can prevent the gas flow from blowing outward again, and the blowing action of the gas flow makes the movable head 34 press the ultrafiltration membrane tube 2 downward, so that the ultrafiltration membrane tube 2 and the movable head 34 are connected tightly, at the same time the ultrafiltration membrane tube 2 pressed downward will press the second movable ring 44 to move downward, and compress the second spring 43 to produce contraction, so that the ultrafiltration membrane tube 2 and the fixed column 41 also maintain a state of tight connection, the air guide pipe 1 continuously delivers gas into the ultrafiltration membrane tube 2 through the upper connecting structure 3, so as to detect the air tightness of the ultrafiltration membrane tube 2, and the pressure condition can be observed intuitively through the pressure gauge 11, so as to detect the air tightness of the ultrafiltration membrane tube 2.

[0040] Need to explain, in the process of using, the user can adjust the air pressure valve 10 through the air pipe 1 to the pressure of the gas flow to the upper connecting structure 3, so that the air tightness effect of the ultrafiltration membrane tube 2 under different water pressure can be simulated, and the position of the ultrafiltration membrane tube 2 can be kept vertical upward through the positioning ring 46. The position of the surface ultrafiltration membrane tube 2 is offset.

[0041] Need to explain, after a group of ultrafiltration membrane tube 2 detection is completed, the air pump 8 will stop running, at this time the air pipe 1 no longer transports gas into the upper connecting structure 3, at this time under the action of the reset spring 33, the movable head 34 is pulled to move upward slowly, at this time the ultrafiltration membrane tube 2 is gradually separated from the movable head 34 under the action of gravity, the upper end of the ultrafiltration membrane tube 2 is gradually separated from the movable head 34, and under the action of the first spring 38, the first movable ring 39 is pushed downward, so that the first movable ring 39 further pushes the ultrafiltration membrane tube 2 downward to separate from the movable head 34, after separation, the user pulls the ultrafiltration membrane tube 2 vertically upward and takes it out, and then takes the next group of ultrafiltration membrane tube 2 to be detected to repeat the detection step.

[0042] Need to explain, in the process of extruding the ultrafiltration membrane tube 2 downward, the second movable ring 44 extrudes the second spring 43 downward to generate a certain contraction, so that the lower end of the ultrafiltration membrane tube 2 is closely connected with the fixed column 41, and in the process of separating the ultrafiltration membrane tube 2 from the fixed column 41, the second spring 43 extrudes the second movable ring 44 upward to move the lower end of the ultrafiltration membrane tube 2 upward by a distance, so that the ultrafiltration membrane tube 2 and the fixed column 41 are separated conveniently, and the whole process is more labor-saving.

[0043] Need to explain, in the whole process of using the device, when leakage occurs between the rotating head 13 and the connecting end of the air outlet pipe 5, the gas in the air outlet pipe 5 will leak out from the gap between the rotating head 13 and the air outlet pipe 5, and the gas will float upward from the water solution 64, and the floating plate 62 will shake by the gas to remind the user that the rotating head 13 and the air outlet pipe 5 connection part leak, so that the user can handle it in time, avoiding the deviation of the detection structure caused by the leakage of the place.

[0044] The above is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A device for detecting gas tightness of a hollow ultrafiltration membrane, characterized by, The utility model provides a kind of air guide pipe and bottom plate, and the both ends of air guide pipe are respectively provided with ultrafiltration membrane tube and rotating head, and the upper connecting structure is arranged between ultrafiltration membrane tube and the one end of air guide pipe, and the other end of ultrafiltration membrane tube is provided with lower connecting structure, and the outer surface of rotating head is movably connected with air outlet pipe, and the observation assembly is arranged between air outlet pipe and rotating head. The upper connecting structure includes fixed block fixedly connected to the one end of air guide pipe, and the lower end of fixed block is provided with guide slot on the outer surface, and the inside of guide slot is provided with return spring, and the lower end of return spring is connected with movable head, and the inside of movable head is fixedly connected with baffle near lower end, and the outer surface of baffle is provided with through hole, and the lower end of movable head is provided with link groove on the outer surface, and the inside of link groove is provided with No. Movable head is slidably connected with fixed block and air guide pipe, and the both ends of return spring are fixedly connected with fixed block and movable head respectively, and the lower end opening of movable head is closed by baffle. The aperture of through hole is smaller than the aperture of air guide pipe, and movable head is moved downward by the blowing of airflow, to realize the connection between movable head and the upper end of ultrafiltration membrane tube, and the upper end of ultrafiltration membrane tube is matched with the lower end of movable head, and the both ends of No. Air pump is arranged between bottom plate and air outlet pipe, the outer surface of air pump is provided with air inlet pipe, air guide pipe is respectively connected with air pressure valve and pressure gauge on the outer surface, support frame is arranged between air guide pipe and bottom plate, air pressure valve is used for adjusting the air pressure blown into air guide pipe by air pump, and pressure gauge is used for directly observing the air pressure in air guide pipe.

2. The device for detecting gas tightness of a hollow ultrafiltration membrane according to claim 1, characterized by The lower connecting structure includes fixed column fixedly connected to the outer surface of bottom plate, and the upper end of fixed column is provided with recessed groove on the outer surface, and the inside of recessed groove is provided with No.

3. The device for detecting gas tightness of a hollow ultrafiltration membrane according to claim 1, characterized by The observation assembly includes water storage frame fixedly connected to the outer surface of air outlet pipe, and water solution is arranged in the cavity formed by water storage frame, air outlet pipe and rotating head, and the upper end of water solution is provided with floating plate, and the outer surface of floating plate is provided with mounting port.

4. The device for detecting gas tightness of a hollow ultrafiltration membrane according to claim 2, characterized by The inner diameter of positioning ring is equal to the outer diameter of ultrafiltration membrane tube, and recessed groove is matched with the lower end of ultrafiltration membrane tube, and the number of positioning bracket is three and is annularly arrayed.

5. The device for detecting gas tightness of a hollow ultrafiltration membrane according to claim 4, characterized by No.

6. The device for detecting gas tightness of a hollow ultrafiltration membrane according to claim 3, characterized by Water storage frame is fixedly connected with air outlet pipe by welding, and waterproof paint is arranged at the connection between water storage frame and air outlet pipe, and floating plate is elastic material with buoyancy.

7. The device for detecting gas tightness of a hollow ultrafiltration membrane according to claim 6, characterized by The upper end of water solution exceeds the joint between rotating head and air outlet pipe, whether there is air leakage at the joint between air guide pipe and air outlet pipe is judged by whether there is bubble in water solution, the evaporation of water solution is reduced by the action of floating plate, and floating plate is conveniently mounted in water storage frame through mounting port.

Images