A rapid docking device and test system for nanofiltration and reverse osmosis membrane testing

Abstract

The utility model discloses a kind of for nanofiltration and reverse osmosis membrane test rapid butt joint device and test system, including the pipe joint for being installed on nanofiltration and reverse osmosis membrane, the outer circumferential wall of pipe joint is provided with ring groove, further including plug-in unit, the plug-in unit includes plug-in pipe, clamping piece, sealing ring and limit card, at least one sealing groove is provided in the outer wall of one end of plug-in pipe, sealing ring is installed in sealing groove, the other end of plug-in pipe is provided with the connecting structure that is connected with pipeline and is limited, the outer wall of plug-in pipe is fixedly connected with multiple hinged seats, the clamping piece includes clamping section, one end of clamping section is hinged with hinged seat by pin shaft, and the other end is provided with limit part;When the end of plug-in pipe installed with sealing ring is inserted into pipe joint, sealing ring and pipe joint inner wall form seal, the limit part of clamping piece is inserted into ring groove, limit card is packed in the outside of clamping section, to limit clamping section. By the above structure, the pipeline of test system and the pipe joint on nanofiltration and reverse osmosis membrane are quickly butt jointed, and also convenient to disassemble.

Description

Technical Field

[0001] This utility model relates to the technical field of water treatment equipment testing devices, and in particular to a rapid docking device and testing system for nanofiltration and reverse osmosis membrane testing. Background Technology

[0002] With the widespread application of membrane technology in water treatment, nanofiltration and reverse osmosis membranes are increasingly used in pure water preparation, wastewater treatment, and reclaimed water reuse. However, the operating flux, operating pressure, and operating durability under different conditions for membranes of different water qualities all need to be determined through preliminary small-scale experiments. Designing engineering projects without prior testing obviously carries significant risks. Therefore, a testing system is needed.

[0003] Because new nanofiltration and reverse osmosis membranes are required for each test item during the experiment, the piping connecting the nanofiltration and reverse osmosis membranes involves repeated disassembly and reassembly. Since the inlet and concentrate outlets of the nanofiltration and reverse osmosis membranes use a mortise-and-tenon joint to connect to the piping, repeated bolt disassembly and reassembly are necessary during testing, and the sealing rings within the mortise-and-tenon joint are easily damaged by compression after several disassembly and reassembly. To facilitate the connection of the piping to the pipe joints on the nanofiltration and reverse osmosis membranes, we have proposed a rapid connection device for nanofiltration and reverse osmosis membrane testing, based on the practical problems encountered.

[0004] A search revealed that in the prior art, Chinese patent document CN217328941U, published on August 30, 2022, discloses a quick connector for a pipe, including a connector pipe, the connector pipe including a sealing part and at least two connecting ends, and at least one connecting end is a female connecting end, the sealing part is connected to the connecting end; the sealing part is provided with at least one sealing groove, and the cross-sectional shape of the sealing groove along the radial direction of the connector pipe is U-shaped. Its advantages are: by setting a U-shaped sealing groove in the quick-connect pipe, the sealing groove can provide axial and radial positioning and support for the sealing ring installed therein. This reduces the risk of poor sealing due to sealing ring displacement caused by vibration in both negative vacuum and high pressure conditions in the pipeline at the front end of the delivery pump and the pipeline at the rear end of the delivery pump. Furthermore, avoiding sealing ring displacement also reduces wear and extends the service life of the sealing ring. Its disadvantages are: the connection of this quick-connect pipe relies on the fit between the arc-shaped locking part on the female connection end and the arc-shaped locking groove on the male connection end. However, the pipe joints on nanofiltration and reverse osmosis membranes use a copying structure connection, and the pipe joint only has a rectangular annular groove with a depth of about 2mm, which cannot be adapted. Additionally, the sealing ring in this device rests against the end of the male connection end during use, and its sealing effect depends on the pressure of the male connection end against the sealing ring. If the pressure is too low, leakage is likely; if the pressure is too high, it is inconvenient to insert the male connection end into the female connection end. When the pipeline pressure is high, a larger pressure is required to prevent leakage, making this structure inconvenient to install. Utility Model Content

[0005] The purpose of this invention is to provide a rapid docking device for nanofiltration and reverse osmosis membrane testing, which can be easily installed on the pipe joints of the nanofiltration membrane and the reverse osmosis membrane inlet and concentrate outlet.

[0006] Another objective of this invention is to provide a testing system for nanofiltration and reverse osmosis membranes.

[0007] To achieve the above objectives, this utility model provides a rapid docking device for nanofiltration and reverse osmosis membrane testing, including a pipe connector for installation on nanofiltration and reverse osmosis membranes. The outer circumferential wall of the pipe connector is provided with an annular groove. It also includes a plug-in unit, which includes a plug tube, a clamping element, a sealing ring, and a limiting clip. One end of the plug tube has at least one sealing groove on its outer wall, and a sealing ring is installed in the sealing groove. The other end of the plug tube has a connection structure for connecting and limiting the connection with a pipeline. Multiple hinge seats are fixedly connected to the outer wall of the plug tube. The clamping element includes a clamping section, one end of which is hinged to the hinge seat via a pin, and the other end has a limiting part. When the end of the plug tube with the sealing ring is inserted into the pipe connector, the sealing ring forms a seal with the inner wall of the pipe connector. The limiting part of the clamping element is engaged in the annular groove, and the limiting clip is engaged on the outside of the clamping section to limit the clamping section.

[0008] The hinge base includes two protruding ear plates, each ear plate having a first hinge hole. The end of the clamping section that is hinged to the hinge base has a protrusion, which has a second hinge hole. The protrusion is movably inserted between the two ear plates of the hinge base, and a pin passes through the first and second hinge holes.

[0009] The clamping member also includes a handle section, which is fixed to the clamping section and is located at the end away from the limiting part.

[0010] The limiting part is an arc-shaped block.

[0011] Two hinge seats are symmetrically fixed to the outer wall of the insertion tube. The limiting clip includes an arc segment and a straight segment connecting the two ends of the arc segment. The straight segments on both sides are respectively clamped to the outside of the clamping segments on both sides.

[0012] At the connection between the arc segment and the straight segment, and on the opposite side of the two straight segments, a limiting platform is provided respectively. The limiting platform is used to abut against the upper side of the clamping segment.

[0013] The outer wall of the clamping section is provided with a groove, and the limiting card is inserted into the groove.

[0014] The connection structure is an external thread, an internal thread, or multiple ring teeth.

[0015] The inner wall of the insertion end of the pipe fitting is chamfered.

[0016] The test system using the aforementioned rapid docking device for nanofiltration and reverse osmosis membrane testing includes a water tank, an inlet pump, a filter, a high-pressure pump, a purified water tank, and a return water pipe. The inlet of the inlet pump is connected to the water tank, the outlet of the inlet pump is connected to the inlet of the filter, the outlet of the filter is connected to the inlet of the high-pressure pump, the outlet of the high-pressure pump is connected to one end of a first connecting pipe, the other end of the first connecting pipe is connected to a connector, one end of the return water pipe is also connected to a connector, and the other end of the return water pipe extends into the water tank. During the test: the connector on the first connecting pipe is connected to the pipe joint on the inlet of the nanofiltration and reverse osmosis membranes, the connector on the return water pipe is connected to the pipe joint on the concentrate outlet of the nanofiltration and reverse osmosis membranes, and the purified water outlet of the nanofiltration and reverse osmosis membranes is connected to the purified water tank.

[0017] Compared with the prior art, this utility model has the following technical effects:

[0018] 1. The insertion pipe of this utility model is inserted into a pipe fitting at one end and connected to a pipeline at the other end. A clamping element is used to hold the annular groove on the pipe fitting to prevent the insertion pipe from detaching from the pipe fitting under pressure. A sealing ring is used to seal the insertion pipe and the pipe fitting. A limiting clip is used to limit the clamping element to prevent it from detaching from the annular groove during testing. This structure allows for quick connection between the pipeline of the testing system and the pipe fittings on nanofiltration and reverse osmosis membranes, and also facilitates disassembly.

[0019] 2. The limiting part of this utility model is an arc-shaped block, which increases the contact area between the limiting part and the annular groove and improves stability.

[0020] 3. The limiting clip of this utility model includes an arc-shaped segment and straight segments connecting the two ends of the arc-shaped segment. The straight segments on both sides are respectively clamped to the outside of the clamping segments on both sides. During installation, the inner wall of the arc-shaped segment abuts against the insertion tube, and the limiting platform abuts against the upper side of the clamping segment, thereby improving the stability of the limiting clip installation.

[0021] 4. The outer wall of the clamping section of this utility model is provided with a groove, and the limiting card is inserted into the groove to prevent the limiting card from slipping off along the axial direction of the clamping section. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0023] Figure 1 This is a three-dimensional structural diagram of the rapid docking device of this utility model.

[0024] Figure 2 This is an exploded view of the rapid docking device of this utility model.

[0025] Figure 3 This is a three-dimensional structural diagram of the insertion pipe in the quick docking device of this utility model.

[0026] Figure 4 This is a three-dimensional structural diagram of the clamping component in the quick docking device of this utility model.

[0027] Figure 5 This is a cross-sectional view of the quick docking device of this utility model, in which the clamping component clamps the pipe joint.

[0028] Figure 6 This is a cross-sectional view of the quick docking device of this utility model, in which the clamping member is in the open state.

[0029] Figure 7 This is a schematic diagram of the structure of the test system of this utility model.

[0030] Figure 8This is a diagram showing the placement of nanofiltration and reverse osmosis membranes in the experimental system of this utility model.

[0031] Figure label:

[0032] Pipe fitting 10, annular groove 11, chamfer 12;

[0033] Insert pipe 20, sealing groove 21, hinge seat 22, ear plate 221, first hinge hole 222, connecting structure 23, pin 24;

[0034] Clamping member 30, clamping section 31, extension part 311, second hinge hole 312, limiting part 313, groove 314, handle section 32;

[0035] Sealing ring 40;

[0036] Limiting card 50, arc segment 51, straight segment 52, limiting platform 53;

[0037] Water tank 100, heat exchanger 110, thermometer 120, inlet pump 200, filter 300, high pressure pump 400, pressure gauge 410, first connecting pipe 420, clean water tank 500, nanofiltration and reverse osmosis membrane 600, water inlet 610, concentrate outlet 620, clean water outlet 630, return water pipe 700.

[0038] Support base 800. Detailed Implementation

[0039] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0040] Example 1:

[0041] See Figure 1-6A rapid docking device for nanofiltration and reverse osmosis membrane testing includes a pipe connector 10 for installation on nanofiltration and reverse osmosis membranes 600. The outer circumferential wall of the pipe connector 10 is provided with an annular groove 11. It also includes a plug-in unit, which includes a plug tube 20, a clamping member 30, a sealing ring 40, and a limiting clip 50. One end of the plug tube 20 has at least one sealing groove 21 on its outer wall, and the sealing ring 40 is installed within the sealing groove 21. The other end of the plug tube 20 is provided with a connection and limiting device for connection with a pipeline. The connector 23 has multiple hinge seats 22 fixedly connected to the outer wall of the insertion pipe 20. The clamping member 30 includes a clamping section 31. One end of the clamping section 31 is hinged to the hinge seat 22 via a pin 24, and the other end is provided with a limiting part 313. When the end of the insertion pipe 20 with the sealing ring 40 is inserted into the pipe joint 10, the sealing ring 40 forms a seal with the inner wall of the pipe joint 10. The limiting part 313 of the clamping member 30 is engaged in the annular groove 11, and the limiting card 50 is engaged on the outside of the clamping section 31 to limit the clamping section 31.

[0042] One end of the insertion tube 20 is inserted into the pipe fitting 10, and the other end is used to connect to the pipeline. The clamping member 30 is used to clamp the annular groove 11 on the pipe fitting 10 to prevent the insertion tube 20 from coming out of the pipe fitting 10 under pressure. The sealing ring 40 is used to seal the insertion tube 20 and the pipe fitting 10. The limiting clip 50 is used to limit the clamping member 30 to prevent it from detaching from the annular groove 11 during the test. With the above structure, the pipeline of the test system can be quickly connected to the pipe fitting 10 on the nanofiltration and reverse osmosis membranes 600, and disassembly is also convenient.

[0043] In this embodiment, the sealing ring 40 is a Y-type sealing ring. For installation, refer to... Figure 5 The groove of the Y-shaped sealing ring faces the pipe joint 10. When the water pressure increases, the water pressure will cause the Y-shaped sealing ring to expand, so that the pipe joint 10 and the insertion pipe 20 can achieve a seal even under greater water pressure.

[0044] Specifically, see Figure 2 , 3 4. The hinge seat 22 includes two protruding ear plates 221. The ear plates 221 are provided with a first hinge hole 222. The end of the clamping section 31 that is hinged to the hinge seat 22 is provided with a protruding part 311. The protruding part 311 is provided with a second hinge hole 312. The protruding part 311 is movably inserted between the two ear plates 221 of the hinge seat 22. The pin 24 passes through the first hinge hole 222 and the second hinge hole 312.

[0045] Furthermore, the clamping member 30 also includes a handle section 32, which is fixed to the clamping section 31 and is located at the end away from the limiting part 313.

[0046] By providing the protrusion 311, the clamping section 31 is spaced apart from the insertion tube 20 by a certain distance, while also facilitating the opening of the clamping section 31 via the handle section 32. Figure 6 As shown.

[0047] In this embodiment, see Figure 4 The limiting part 313 is an arc-shaped block, which increases the contact area between the limiting part 313 and the annular groove 11 and improves stability.

[0048] In this embodiment, see Figure 1 , 2 Two hinge seats 22 are symmetrically fixed to the outer wall of the insertion tube 20. The limiting card 50 includes an arc-shaped segment 51 and a straight segment 52 connected to both ends of the arc-shaped segment 51. The straight segments 52 on both sides are respectively clamped to the outside of the clamping segments 31 on both sides.

[0049] Furthermore, at the connection between the arc-shaped segment 51 and the straight segment 52, and on the opposite side of the two straight segments 52, a limiting platform 53 is provided. The limiting platform 53 is used to abut against the upper side of the clamping segment 31. See Figure 2 The inner diameter of the arc segment 51 is smaller than the distance between the two straight segments 52. During installation, refer to... Figure 1 The inner wall of the arc-shaped section 51 abuts against the insertion tube 20, and the limiting platform 53 abuts against the upper side of the clamping section 31, improving the stability of the installation of the limiting card 50.

[0050] Further, see Figure 4 The outer wall of the clamping section 31 is provided with a groove 314, and the limiting card 50 is inserted into the groove 314 to prevent the limiting card 50 from slipping off along the axial direction of the clamping section 31.

[0051] In this embodiment, see Figure 3 The connection structure 23 can be an external thread, an internal thread, or multiple ring threads. When multiple ring threads are used, the hose is fitted onto the outside of the ring threads, and then a clamp is installed on the outside of the hose to fix the hose to the connector 20.

[0052] To facilitate the insertion of the insertion tube 20 and sealing ring 40 into the pipe fitting 10, see [link / reference]. Figure 5 The inner wall of the insertion end of the pipe connector 10 is provided with a chamfer 12, so that the inner hole at the end of the pipe connector 10 forms a trumpet-shaped structure with a larger outer diameter and a smaller inner diameter.

[0053] Example 2:

[0054] Based on Example 1, see Figure 7This utility model also discloses a test system for a rapid docking device for nanofiltration and reverse osmosis membrane experiments, including a water tank 100, an inlet pump 200, a filter 300, a high-pressure pump 400, a clean water tank 500, and a return water pipe 700. The inlet of the inlet pump 200 is connected to the water tank 100, the outlet of the inlet pump 200 is connected to the inlet of the filter 300, the outlet of the filter 300 is connected to the inlet of the high-pressure pump 400, and the outlet of the high-pressure pump 400 is connected to one end of a first connecting pipe 420. The other end of the first connector 420 is connected to a plug unit, and one end of the return water pipe 700 is also connected to a plug unit. The other end of the return water pipe 700 extends into the water tank 100. During the test: the plug unit on the first connector 420 is connected to the pipe connector 10 on the inlet 610 of the nanofiltration and reverse osmosis membrane 600, the plug unit on the return water pipe 700 is connected to the pipe connector 10 on the concentrate outlet 620 of the nanofiltration and reverse osmosis membrane 600, and the purified water outlet 630 of the nanofiltration and reverse osmosis membrane 600 is connected to the purified water tank 500 through a pipe.

[0055] Water tank 100 is used to hold test water. Inlet pump 200 is used to draw water from water tank 100 to filter 300 for filtration. High pressure pump 400 is used to pressurize water. Pressurized water enters the inlet 610 of nanofiltration and reverse osmosis membrane 600 through first connector 420. Concentrated water returns to water tank 100 from concentrated water outlet 620 through return water pipe 700. Purified water is collected in purified water tank 500.

[0056] To regulate the water temperature in the water tank 100, a heat exchanger 110 can be installed inside the tank. During operation, water of different temperatures is circulated through the heat exchanger 100 via pipes. The water tank 100 is also equipped with a thermometer 120 for measuring the water temperature. To monitor the inlet water pressure of the nanofiltration and reverse osmosis membranes 600, a pressure gauge 410 is installed on the outlet pipe of the high-pressure pump 400. The high-pressure pump 400 is powered by a frequency converter, and its speed can be adjusted by frequency conversion, thereby regulating the output water pressure.

[0057] In this embodiment, the return water pipe 700 can be a rubber hose, and the first connecting pipe 420 can be a high-pressure hose. This facilitates the connection of the unit, such as... Figure 1 Insert the pipe connector 10 in the direction shown, that is, the clamps 30 on both sides are in a lateral position.

[0058] It should be noted that if pressure gauge 410 is installed, a metal pipe can be installed at one end of the outlet of high-pressure pump 400, and a pipe pressure gauge can be installed on the metal pipe. The downstream end of the metal pipe is connected to the first connecting pipe 420.

[0059] See Figure 8During the test, the nanofiltration membrane or reverse osmosis membrane is placed on the support base 800, which has an arc-shaped groove or V-shaped groove on its top. The inlet 610 and concentrate outlet 620 extend laterally.

[0060] The method of use or principle of this utility model:

[0061] See Figure 7 During the experiment, water of different qualities was added to the water tank 100 in several batches. The inlet pump 200 drew water from the water tank 100 to the filter 300 for filtration. The high-pressure pump 400 pressurized the water. The pressurized water entered the inlet 610 of the nanofiltration and reverse osmosis membrane 600 through the first connecting pipe 420. The concentrate returned to the water tank 100 from the concentrate outlet 620 through the return water pipe 700. The purified water was collected in the clean water tank 500.

[0062] During the test, the water supply pressure was adjusted by frequency regulation of the high-pressure pump 400, and the water temperature was adjusted by heat exchanger 100.

Claims

1. A rapid docking device for nanofiltration and reverse osmosis membrane testing, comprising a pipe connector (10) for mounting on nanofiltration and reverse osmosis membranes (600), wherein the outer circumferential wall of the pipe connector (10) is provided with an annular groove (11), characterized in that: It also includes a plug-in unit, which includes a plug-in pipe (20), a clamping member (30), a sealing ring (40), and a limiting clip (50). One end of the plug-in pipe (20) has at least one sealing groove (21) on its outer wall, and a sealing ring (40) is installed inside the sealing groove (21). The other end of the plug-in pipe (20) has a connection structure (23) for connecting and limiting the connection with a pipeline. Multiple hinge seats (22) are fixedly connected to the outer wall of the plug-in pipe (20). The clamping member (30) includes... The clamping section (31) is hinged to the hinge seat (22) by a pin (24) at one end and a limiting part (313) is provided at the other end. When the end of the insertion pipe (20) with the sealing ring (40) is inserted into the pipe joint (10), the sealing ring (40) forms a seal with the inner wall of the pipe joint (10), the limiting part (313) of the clamping part (30) is inserted into the ring groove (11), and the limiting card (50) is installed on the outside of the clamping section (31) to limit the clamping section (31).

2. The rapid docking device for nanofiltration and reverse osmosis membrane testing according to claim 1, characterized in that: The hinge seat (22) includes two protruding ear plates (221), and the ear plates (221) are provided with a first hinge hole (222). The clamping section (31) is hinged to the hinge seat (22) and is provided with a protrusion (311). The protrusion (311) is provided with a second hinge hole (312). The protrusion (311) is movably inserted between the two ear plates (221) of the hinge seat (22), and the pin (24) passes through the first hinge hole (222) and the second hinge hole (312).

3. The rapid docking device for nanofiltration and reverse osmosis membrane testing according to claim 1, characterized in that: The clamping member (30) also includes a handle section (32), which is fixed to the clamping section (31) and is located at the end away from the limiting part (313).

4. The rapid docking device for nanofiltration and reverse osmosis membrane testing according to claim 1, characterized in that: The limiting part (313) is an arc-shaped block.

5. A rapid docking device for nanofiltration and reverse osmosis membrane testing according to claim 1, characterized in that: The outer wall of the insertion tube (20) is symmetrically fixed with two hinge seats (22). The limiting card (50) includes an arc segment (51) and a straight segment (52) connected to both ends of the arc segment (51). The straight segments (52) on both sides are respectively clamped to the outside of the clamping segments (31) on both sides.

6. A rapid docking device for nanofiltration and reverse osmosis membrane testing according to claim 5, characterized in that: At the connection between the arc segment (51) and the straight segment (52), and on the opposite side of the two straight segments (52), a limiting platform (53) is provided respectively. The limiting platform (53) is used to abut against the upper side of the clamping segment (31).

7. A rapid docking device for nanofiltration and reverse osmosis membrane testing according to claim 1, 5, or 6, characterized in that: The outer wall of the clamping section (31) is provided with a groove (314), and the limiting card (50) is inserted into the groove (314).

8. A rapid docking device for nanofiltration and reverse osmosis membrane testing according to claim 1, characterized in that: The connection structure (23) is an external thread, an internal thread, or multiple ring teeth.

9. A rapid docking device for nanofiltration and reverse osmosis membrane testing according to claim 1, characterized in that: The inner wall of the insertion end of the pipe fitting (10) is provided with a chamfer (12).

10. A test system using any one of claims 1 to 9 for rapid docking of nanofiltration and reverse osmosis membrane testing, characterized in that: The system includes a water tank (100), an inlet pump (200), a filter (300), a high-pressure pump (400), a purified water tank (500), and a return water pipe (700). The inlet of the inlet pump (200) is connected to the water tank (100), the outlet of the inlet pump (200) is connected to the inlet of the filter (300), the outlet of the filter (300) is connected to the inlet of the high-pressure pump (400), and the outlet of the high-pressure pump (400) is connected to one end of a first connecting pipe (420). The other end of the first connecting pipe (420) is connected to... The plug-in unit is connected to one end of the return water pipe (700), and the other end of the return water pipe (700) extends into the water tank (100). During the test: the plug-in unit on the first connecting pipe (420) is connected to the pipe connector (10) on the inlet (610) of the nanofiltration and reverse osmosis membrane (600), the plug-in unit on the return water pipe (700) is connected to the pipe connector (10) on the concentrate outlet (620) of the nanofiltration and reverse osmosis membrane (600), and the purified water outlet (630) of the nanofiltration and reverse osmosis membrane (600) is connected to the purified water tank (500).

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