A permeability testing device for reverse osmosis membrane materials

Abstract

The invention discloses a permeability testing device for reverse osmosis membrane materials, and relates to the technical field of reverse osmosis membrane testing, including a support frame, and a continuous liquid injection part is installed on the outer side of a liquid injection cylinder. The invention provides a continuous liquid injection part, and pours sodium chloride solutions of different concentrations into different storage tanks. The motor drives the rotation of the reciprocating screw to move the movable pull plate upward along the reciprocating screw. When the second piston rod moves upward, the solution in the storage tank connected to the liquid injection cylinder can be drawn into the liquid injection cylinder. The solution in different storage tanks is extracted and squeezed into the reverse osmosis membrane by the up and down reciprocating movement of the movable pull plate, so that the reverse osmosis membrane performs interception test on sodium chloride solutions of different concentrations, thereby improving the continuity of the test, and there is no need for the staff to repeatedly operate the sodium chloride solutions of different concentrations, which reduces the labor intensity of the staff, and also improves the test efficiency of the reverse osmosis membrane.

Description

Technical Field

[0001] The invention relates to the technical field of reverse osmosis membrane testing, in particular to a permeability testing device for a reverse osmosis membrane material. Background Art

[0002] Reverse osmosis membrane is an artificial semipermeable membrane with certain characteristics made by simulating biological semipermeable membrane. It is the core component of reverse osmosis technology. The principle of reverse osmosis technology is to separate these substances and water under the action of higher osmotic pressure than the solution, based on the fact that other substances cannot pass through the semipermeable membrane. The pore size of the reverse osmosis membrane is very small, so it can effectively remove dissolved salts, colloids, microorganisms, organic matter, etc. in water.

[0003] Since the reverse osmosis membrane can effectively intercept all dissolved salts and organic matter with a molecular weight greater than 100, while allowing water molecules to pass through, sodium chloride solution is generally used as the raw liquid when testing the reverse osmosis membrane, and the interception rate of sodium chloride by the reverse osmosis membrane for sodium chloride under the same pressure is measured for sodium chloride solutions of different concentrations, wherein the conductivity of the sodium chloride solution of the initial concentration is first measured, substituted into the conductivity concentration relationship curve, the content of sodium chloride contained in the solution is calculated, and then the solution after being intercepted by the reverse osmosis membrane is tested. However, when allowing sodium chloride solutions of different concentrations to pass through the reverse osmosis membrane, it is necessary to first use a sodium chloride solution of one concentration to test the permeability of the reverse osmosis membrane, and then inject the remaining concentrations of sodium chloride into the reverse osmosis membrane for testing after the test is completed. Not only is the operation cumbersome, but it also prolongs the test cycle and reduces the test efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a permeability performance testing device for a reverse osmosis membrane material in order to solve the problems of long testing cycle and low testing efficiency.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a permeability performance testing device for a reverse osmosis membrane material, comprising a support frame, a liquid injection cylinder is installed on the top of the support frame, a partition is installed on the inner side of the support frame, a test cylinder extending to the bottom of the partition is installed on the top of the partition, a third one-way valve is provided at the bottom of the liquid injection cylinder, a reverse osmosis membrane located on the inner side of the support frame is installed at the bottom end of the third one-way valve, a continuous liquid injection part is installed on the outer side of the liquid injection cylinder, the outer side of the liquid injection cylinder is connected to a storage tank through the continuous liquid injection part, a limiting column is installed on the top of the liquid injection cylinder, a top plate is installed on the top of the limiting column, a material vibration unit is provided on one side of the top plate, the top plate is connected to a test probe located on the inner side of the test cylinder through the material vibration unit, and a discharge part is installed at the bottom end of the test cylinder.

[0006] As a further solution of the present invention: there are multiple storage tanks, and the multiple storage tanks are connected to the bottom of the injection cylinder through connecting pipes, and the multiple storage tanks are distributed at equal distances along the center of the injection cylinder.

[0007] As a further solution of the present invention: the liquid inlet of the third one-way valve is connected to the bottom of the liquid injection cylinder, and the liquid discharge port of the third one-way valve is connected to the liquid inlet end of the reverse osmosis membrane.

[0008] As a further solution of the present invention: the continuous liquid injection component includes a motor installed on the top of the top plate, the output end of the motor is connected to a reciprocating screw arranged side by side with the limit column, the bottom of the storage tank is installed with a flow blocking bin, the interior of the flow blocking bin is slidably connected with a liquid blocking plug block, the liquid blocking plug block is provided with a push rod extending to the outside of the flow blocking bin, the push rod is provided with a first return spring connected to the outer wall of the flow blocking bin, the push rod is rotatably connected to an oblique pressure rod on the side of the push rod close to the liquid injection cylinder via a rotating shaft, the oblique pressure rod is rotatably connected to a shift rack via a rotating shaft, the shift rack is provided with a guide wheel, the outer wall of the liquid injection cylinder is rotatably connected to a worm gear ring via a bearing, and the bottom of the worm gear ring is provided with a cam at the same horizontal height as the guide wheel. The outer wall of the injection cylinder is connected with a worm meshing with the worm wheel ring, ratchets are installed at both ends of the worm, and spur gear rings located on the outside of the ratchet are installed on the outer sides of the two ends of the worm, and the inner side of the spur gear ring is rotatably connected with a pawl meshing with the ratchet, and the connection between the pawl and the spur gear ring is clamped with a torsion spring through a slot, and a second piston rod extending to the top of the injection cylinder is inserted into the interior of the injection cylinder, and a T-shaped plug block extending to the top of the second piston rod is inserted into the inner side of the second piston rod, and a movable pull plate sleeved on the outside of the reciprocating screw and the limit column is installed on the top of the T-shaped plug block, and an extension frame is installed on the side of the movable pull plate close to the worm, and a shift rack meshing with the spur gear ring is arranged at the bottom end of the extension frame.

[0009] As a further solution of the present invention: the length of the shift rack is equal to the length of the vertical end of the T-shaped plug block.

[0010] As a further solution of the present invention: the material shock unit includes a positioning guide frame installed on the side of the top plate, a guide rod is installed on the side of the movable pull plate away from the extension frame, a movable tube is sleeved on the guide rod, a test probe is installed at the bottom of the discharge cylinder and extends into the test cylinder, a clamping hole is opened on the guide rod, a pin extending to the inside of the clamping hole is inserted into the outer wall of the movable tube, a second reset spring connected to the outer wall of the movable tube is arranged on the outer side of the pin, and a guide roller located below the positioning guide frame is installed on the end of the second reset spring away from the guide rod.

[0011] As a further solution of the present invention: the diameter of the end of the latch pin close to the guide rod is equal to the diameter of the clamping hole, and the end of the latch pin away from the guide roller is rotatably connected to a ball via a rotating shaft.

[0012] As a further solution of the present invention: the discharge member includes a second one-way valve connected to the bottom of the test cylinder through a connecting pipe, a discharge cylinder is installed at one end of the second one-way valve, a first piston rod is inserted into the interior of the discharge cylinder, a connecting plate connected to the first piston rod is installed at the bottom end of the shift rack, and the first one-way valve is installed on the outer wall of the discharge cylinder.

[0013] As a further solution of the present invention: the water outlet of the second one-way valve is connected to the discharge barrel, and the water inlet of the first one-way valve is connected to the discharge barrel.

[0014] As a further solution of the present invention: the length of the discharge cylinder is equal to the moving distance of the extension frame, and the space inside the discharge cylinder is larger than the space inside the test cylinder.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting a continuous liquid injection part, sodium chloride solutions of different concentrations are poured into different storage tanks, and the reciprocating screw is driven by the motor to rotate to make the movable pull plate move up along the reciprocating screw, and at the same time, the protrusion of the cam ring squeezes the guide wheel under one of the storage tanks, so that the storage tank at this location is in a connected state with the injection cylinder, and the second piston rod moves up to draw the solution in the storage tank in a connected state with the injection cylinder into the injection cylinder, and the solutions in different storage tanks are drawn and squeezed into the reverse osmosis membrane by the up and down reciprocating movement of the movable pull plate, so that the reverse osmosis membrane can perform interception test on sodium chloride solutions of different concentrations, so as to improve the continuity of the test, and there is no need for the staff to repeatedly operate the sodium chloride solutions of different concentrations, which reduces the labor intensity of the staff and also improves the test efficiency of the reverse osmosis membrane;

[0017] 2. By setting a material vibration unit, when the movable pull plate moves upward relative to the liquid injection cylinder, it will drive the guide rod to move upward. At this time, the movable tube moves with the guide rod through the latch pin. When the guide roller contacts the positioning guide frame, the guide roller will be squeezed by the inclined surface of the positioning guide frame, so that the guide roller drives the latch pin to move in the direction away from the card hole. When the latch pin is separated from the card hole, the movable tube will move downward relative to the guide rod under the action of its own gravity, so that the test probe will fall quickly, so that the solution on the surface of the test probe is separated from the test probe under the action of inertia, thereby preventing the residual solution on the surface of the test probe from affecting the subsequent detection of the solution falling into the test cylinder, so as to improve the accuracy of the detection data. Afterwards, when the guide rod moves downward, the card hole is aligned with the latch pin, and the latch pin will be inserted into the card hole under the action of the elastic restoring force of the second reset spring;

[0018] 3. By setting a discharge piece, when the movable pull plate drives the extension frame to move upward, the first piston rod will be driven to move through the shifting rack and the connecting plate, so that the first piston rod is moved upward relative to the discharge cylinder. At this time, the solution after detection inside the test cylinder will enter the discharge cylinder through the second one-way valve. When the first piston rod moves downward relative to the discharge cylinder, the first piston rod will squeeze the solution inside the discharge cylinder, so that the solution inside the discharge cylinder is discharged through the first one-way valve, so as to realize the extraction of the solution inside the test cylinder, so as to prevent the mixing of the solutions intercepted by the reverse osmosis membrane, and improve the fluency of the reverse osmosis membrane permeability test. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is a side view of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the outer wall of the liquid injection cylinder of the present invention;

[0022] Figure 4 It is a schematic diagram of the connection between the cam ring and the shift rack of the present invention;

[0023] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

[0024] Figure 6 It is a schematic diagram of the connection between the injection cylinder and the storage tank of the present invention;

[0025] Figure 7 It is a schematic diagram of the connection between the cam ring and the choke chamber of the present invention;

[0026] Figure 8 It is a schematic diagram of the internal structure of the second piston rod of the present invention;

[0027] Fig. 9 It is a schematic diagram of the connection between the movable tube and the guide rod of the present invention;

[0028] Fig.10 It is a schematic structural diagram of the discharge member of the present invention.

[0029] In the figure: 1, support frame; 2, partition; 3, test cylinder; 4, injection cylinder; 5, storage tank; 6, reverse osmosis membrane; 7, test probe; 801, movable tube; 802, guide rod; 803, positioning guide frame; 804, motor; 805, top plate; 806, limit column; 807, discharge cylinder; 808, first piston rod; 809, connecting plate; 810, worm; 811, extension frame; 812, reciprocating screw; 813, worm wheel ring; 814, movable pull plate; 815, T-type plug block; 8 16. Second piston rod; 817. Cam ring; 818. Shifting rack; 819. Ratchet; 820. Ratchet; 821. Spur gear ring; 822. Oblique pressure rod; 823. First return spring; 824. Throttling chamber; 825. Push rod; 826. Guide wheel; 827. Liquid blocking plug; 828. Shifting frame; 829. Guide roller; 830. Second return spring; 831. Latch; 832. Clamp hole; 833. First one-way valve; 834. Second one-way valve; 835. Third one-way valve. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0032] See also Figures 1 to 10 In an embodiment of the present invention, a permeability performance testing device for a reverse osmosis membrane material includes a support frame 1, a liquid injection cylinder 4 is installed on the top of the support frame 1, a partition 2 is installed on the inner side of the support frame 1, a test cylinder 3 extending to the bottom of the partition 2 is installed on the top of the partition 2, a third one-way valve 835 is provided at the bottom of the liquid injection cylinder 4, a reverse osmosis membrane 6 located on the inner side of the support frame 1 is installed at the bottom end of the third one-way valve 835, a continuous liquid injection part is installed on the outer side of the liquid injection cylinder 4, a storage tank 5 is connected to the outer side of the liquid injection cylinder 4 through the continuous liquid injection part, a limiting column 806 is installed on the top of the liquid injection cylinder 4, a top plate 805 is installed on the top of the limiting column 806, a material vibration unit is provided on one side of the top plate 805, the top plate 805 is connected to a test probe 7 located on the inner side of the test cylinder 3 through the material vibration unit, and a discharge part is installed at the bottom end of the test cylinder 3.

[0033] In this embodiment, sodium chloride solutions of different concentrations are first poured into the storage tank 5, and then the reverse osmosis membrane 6 is installed at the bottom of the injection cylinder 4 so that it is located above the test cylinder 3. Then, the continuous injection part is started, and the sodium chloride inside the storage tank 5 enters the injection cylinder 4 through the operation of the continuous injection part. At the same time, the sodium chloride solution entering the injection cylinder 4 enters the reverse osmosis membrane 6 through the third one-way valve 835 through the operation of the continuous injection part, and the sodium chloride in the solution is intercepted by the reverse osmosis membrane 6, and then the solution falls into the test cylinder 3. At this time, The solution intercepted by the test probe 7 is tested, and the operation of the continuous injection part allows sodium chloride solutions of different concentrations to enter the reverse osmosis membrane 6 in an orderly manner, thereby improving the smoothness of the test of the reverse osmosis membrane 6, reducing the labor intensity of the staff, and also improving the test efficiency. When a sodium chloride solution of a certain concentration enters the injection cylinder 4, the solution inside the test cylinder 3 is extracted through the operation of the discharge part, and the solution on the surface of the test probe 7 is cleaned through the vibration unit, thereby improving the test accuracy of the test probe 7 on the solution falling into the test cylinder 3.

[0034] Please refer to Figure 1 , Figure 2 , Figure 6 There are multiple storage tanks 5 , and the multiple storage tanks 5 are connected to the bottom of the injection cylinder 4 through connecting pipes, and the multiple storage tanks 5 are distributed at equal distances along the center of the injection cylinder 4 .

[0035] In this embodiment, by providing this structure, sodium chloride solutions of different concentrations can be poured into different storage tanks 5 , thereby improving the fluency of subsequent testing of the reverse osmosis membrane 6 .

[0036] Please refer to Figure 6 The liquid inlet of the third one-way valve 835 is connected to the bottom of the liquid injection cylinder 4 , and the liquid discharge port of the third one-way valve 835 is connected to the liquid inlet end of the reverse osmosis membrane 6 .

[0037] In this embodiment, this structure is provided to allow the solution inside the injection cylinder 4 to flow in only one direction.

[0038] Please refer to Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8The continuous liquid injection part includes a motor 804 installed on the top of the top plate 805, the output end of the motor 804 is connected to a reciprocating screw rod 812 arranged side by side with the limiting column 806, a blocking bin 824 is installed at the bottom of the storage tank 5, and a liquid blocking plug 827 is slidably connected to the inside of the blocking bin 824, and a push rod 825 extending to the outside of the blocking bin 824 is provided on the blocking plug 827, and a first return spring 823 connected to the outer wall of the blocking bin 824 is provided on the push rod 825, and a side of the push rod 825 close to the liquid injection cylinder 4 is rotatably connected to an oblique pressure rod 822 through a rotating shaft, and a shift rack 828 is rotatably connected to the oblique pressure rod 822 through a rotating shaft, and a guide wheel 826 is provided on the shift rack 828, and the outer wall of the liquid injection cylinder 4 is rotatably connected to a worm gear ring 813 through a bearing, and a cam ring 817 at the same horizontal height as the guide wheel 826 is installed at the bottom of the worm gear ring 813, and the outer wall of the liquid injection cylinder 4 A worm 810 meshing with the worm wheel ring 813 is connected, ratchet wheels 819 are installed at both ends of the worm 810, and spur gear rings 821 located outside the ratchet wheels 819 are installed outside the two ends of the worm 810. The inner side of the spur gear ring 821 is rotatably connected to a ratchet 820 meshing with the ratchet wheel 819. The connection between the ratchet 820 and the spur gear ring 821 is connected to a torsion spring through a slot. The inside of the injection cylinder 4 is plugged with a spring extending to the top of the injection cylinder 4. The second piston rod 816 is provided with a T-shaped plug 815 extending to the top of the second piston rod 816 on the inner side thereof, and a movable pull plate 814 which is sleeved on the outside of the reciprocating screw 812 and the limiting column 806 is installed on the top of the T-shaped plug 815. An extension frame 811 is installed on the side of the movable pull plate 814 close to the worm gear 810, and a shift rack 818 which meshes with the spur gear ring 821 is provided at the bottom end of the extension frame 811.

[0039] In this embodiment, sodium chloride solutions of different concentrations are poured into different storage tanks 5. The guide wheel 826 at the bottom of the storage tank 5 near the protrusion of the cam ring 817 is squeezed by the protrusion of the cam ring 817, so that the liquid blocking plug 827 loses its shielding of the bottom of the storage tank 5 at that location, while the flow blocking bins 824 at the bottom of the remaining storage tanks 5 are all blocked by the liquid blocking plug 827. The motor 804 is started, and the reciprocating screw 812 is driven by the motor 804 to rotate to move the movable pull plate 814 upward along the reciprocating screw 812. At this time, the movable pull plate 814 drives the T-shaped plug 815 to move upward. The T-shaped plug 815 moves relative to the second piston rod 816, and at the same time, the shift rack 818 shifts the spur gear ring 821 to rotate, so that the spur gear ring 821 drives the worm 810 to rotate through the pawl 820 and the ratchet 819, so that the worm ring 813 drives the cam ring 817 to rotate a certain angle, so that the protrusion of the cam ring 817 squeezes the guide wheel 826 under one of the storage tanks 5, so that the storage tank 5 at this location is in a connected state with the injection cylinder 4. When the vertical end of the T-shaped plug 815 is completely moved out of the second piston rod 816, the movable pull plate 814 continues to move upward. When the T-shaped plug 815 is fully inserted into the second piston rod 816, the movable pull plate 814 continues to move downward to push the second piston rod 816 to move downward, so that the solution in the injection cylinder 4 is injected into the reverse osmosis membrane 6 through the third one-way valve 835. When the spur gear ring 821 is meshed with the spur gear ring 821, the spur gear ring 821 will rotate relative to the worm 810. When the solution passes through the reverse osmosis membrane 6 and enters the test tube 3, the intercepted solution is detected by the test probe 7. Then, the solution in different storage tanks 5 is extracted by the up and down reciprocating movement of the movable pull plate 814, so that the reverse osmosis membrane 6 can perform interception test on sodium chloride solutions of different concentrations, thereby improving the continuity of the test, eliminating the need for the staff to repeatedly operate on sodium chloride solutions of different concentrations, reducing the labor intensity of the staff, and also improving the test efficiency of the reverse osmosis membrane 6.

[0040] Please refer to Figure 8 The length of the shift rack 818 is equal to the length of the vertical end of the T-shaped plug block 815.

[0041] In this embodiment, by providing this structure, after the vertical end of the T-shaped plug 815 is completely moved out of the second piston rod 816 , the shift rack 818 is separated from the spur gear ring 821 , thereby accurately controlling the rotation angle of the cam ring 817 .

[0042] Please refer to Figure 1 , Figure 3 , Fig. 9 The material shock unit includes a positioning guide frame 803 installed on the side of the top plate 805, a guide rod 802 is installed on the side of the movable pull plate 814 away from the extension frame 811, and a movable tube 801 is sleeved on the guide rod 802. The test probe 7 is installed at the bottom of the discharge cylinder 807 and extends into the test cylinder 3. A clamping hole 832 is opened on the guide rod 802, and a latch 831 extending to the inside of the latching hole 832 is inserted into the outer wall of the movable tube 801. A second return spring 830 connected to the outer wall of the movable tube 801 is arranged on the outer side of the latch 831, and a guide roller 829 located below the positioning guide frame 803 is installed on the end of the second return spring 830 away from the guide rod 802.

[0043] In this embodiment, when the movable pull plate 814 moves upward relative to the injection cylinder 4, it will drive the guide rod 802 to move upward. At this time, the movable tube 801 moves along with the guide rod 802 through the latch 831. When the guide roller 829 contacts the positioning guide frame 803, the guide roller 829 will be squeezed by the inclined surface of the positioning guide frame 803, so that the guide roller 829 drives the latch 831 to move in the direction away from the clamping hole 832. When the latch 831 is separated from the clamping hole 832, the movable tube 801 will move under the action of its own gravity. The relative guide rod 802 moves downward to make the test probe 7 fall quickly, so that the solution on the surface of the test probe 7 is separated from the test probe 7 under the action of inertia, thereby preventing the residual solution on the surface of the test probe 7 from affecting the subsequent detection of the solution falling into the test tube 3, thereby improving the accuracy of the detection data. Afterwards, when the guide rod 802 moves downward, the card hole 832 is aligned with the pin 831, and the pin 831 is inserted into the card hole 832 under the action of the elastic restoring force of the second reset spring 830.

[0044] Please refer to Fig. 9 The diameter of the end of the latch pin 831 close to the guide rod 802 is equal to the diameter of the clamping hole 832, and the end of the latch pin 831 away from the guide roller 829 is rotatably connected to a ball through a rotating shaft.

[0045] In this embodiment, this structure is provided to improve the stability of the connection between the guide rod 802 and the movable tube 801 , while also reducing the friction between the latch 831 and the guide rod 802 , thereby improving the smoothness of the downward movement of the movable tube 801 relative to the guide rod 802 .

[0046] Please refer to Figure 1 , Figure 2 , Fig.10The discharge member includes a second one-way valve 834 connected to the bottom of the test cylinder 3 through a connecting pipe, a discharge cylinder 807 is installed at one end of the second one-way valve 834, a first piston rod 808 is inserted into the interior of the discharge cylinder 807, a connecting plate 809 connected to the first piston rod 808 is installed at the bottom end of the shift rack 818, and a first one-way valve 833 is installed on the outer wall of the discharge cylinder 807.

[0047] In this embodiment, when the movable pull plate 814 drives the extension frame 811 to move upward, it will drive the first piston rod 808 to move through the shift rack 818 and the connecting plate 809, so that the first piston rod 808 moves upward relative to the discharge barrel 807. At this time, the solution after detection inside the test barrel 3 will enter the discharge barrel 807 through the second one-way valve 834. When the first piston rod 808 moves downward relative to the discharge barrel 807, the first piston rod 808 will squeeze the solution inside the discharge barrel 807, so that the solution inside the discharge barrel 807 is discharged through the first one-way valve 833, thereby realizing the extraction of the solution inside the test barrel 3, preventing the mixing of the solutions intercepted by the reverse osmosis membrane 6, and improving the fluency of the permeability test of the reverse osmosis membrane 6.

[0048] Please refer to Fig.10 The water outlet of the second one-way valve 834 is connected to the discharge cylinder 807 , and the water inlet of the first one-way valve 833 is connected to the discharge cylinder 807 .

[0049] In this embodiment, this structure is provided to allow the solution in the discharge cylinder 807 to flow in one direction, thereby achieving the discharge of the solution in the test cylinder 3 .

[0050] Please refer to Figure 1 , Figure 2 , Fig.10 The length of the discharge cylinder 807 is equal to the moving distance of the extension frame 811 , and the space inside the discharge cylinder 807 is larger than the space inside the test cylinder 3 .

[0051] In this embodiment, by providing this structure, the solution inside the test cylinder 3 can be fully extracted when the first piston rod 808 moves.

[0052] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A permeability testing device for a reverse osmosis membrane material, comprising a support frame (1), characterized in that: A liquid injection cylinder (4) is installed on the top of the support frame (1), a partition (2) is installed on the inner side of the support frame (1), a test cylinder (3) extending to the bottom of the partition (2) is installed on the top of the partition (2), a third one-way valve (835) is provided at the bottom of the liquid injection cylinder (4), a reverse osmosis membrane (6) located on the inner side of the support frame (1) is installed at the bottom end of the third one-way valve (835), a continuous liquid injection component is installed on the outer side of the liquid injection cylinder (4), and the outer side of the liquid injection cylinder (4) is connected to a storage tank (5) through the continuous liquid injection component, a limiting column (806) is installed on the top of the liquid injection cylinder (4), a top plate (805) is installed on the top of the limiting column (806), a material vibration unit is provided on one side of the top plate (805), the top plate (805) is connected to a test probe (7) located on the inner side of the test cylinder (3) through the material vibration unit, and a material discharge component is installed at the bottom end of the test cylinder (3); The continuous liquid injection component comprises a motor (804) installed on the top of the top plate (805); the output end of the motor (804) is connected to a reciprocating screw (812) arranged side by side with the limiting column (806); a flow blocking bin (824) is installed at the bottom of the storage tank (5); a liquid blocking plug (827) is slidably connected to the inside of the flow blocking bin (824); a push rod (825) extending to the outside of the flow blocking bin (824) is provided on the liquid blocking plug (827); and a push rod (825) is provided on the push rod (825) which is connected to the outside of the flow blocking bin (824). The first return spring (823) is connected to the wall of the liquid injection cylinder (4); the side of the push rod (825) close to the liquid injection cylinder (4) is rotatably connected to an inclined pressure rod (822) via a rotating shaft; the inclined pressure rod (822) is rotatably connected to a shift frame (828) via a rotating shaft; the shift frame (828) is provided with a guide wheel (826); the outer wall of the liquid injection cylinder (4) is rotatably connected to a worm wheel ring (813) via a bearing; the bottom of the worm wheel ring (813) is provided with a cam ring (817) at the same level as the guide wheel (826); the liquid injection cylinder (4) The outer wall of the worm (810) is connected to a worm (810) meshing with a worm wheel ring (813), ratchet wheels (819) are installed at both ends of the worm (810), and spur gear rings (821) located outside the ratchet wheels (819) are installed outside the two ends of the worm (810), and the inner side of the spur gear ring (821) is rotatably connected to a ratchet pawl (820) meshing with the ratchet wheel (819), and a torsion spring is clamped at the connection between the ratchet pawl (820) and the spur gear ring (821) through a clamping groove, and a spring extending to the injection cylinder (4) is inserted into the interior of the injection cylinder (4). ) at the top of the second piston rod (816), the inner side of the second piston rod (816) is plugged with a T-shaped plug block (815) extending to the top of the second piston rod (816), the top of the T-shaped plug block (815) is installed with a movable pull plate (814) sleeved on the reciprocating screw rod (812) and the outer side of the limit column (806), the side of the movable pull plate (814) close to the worm (810) is installed with an extension frame (811), and the bottom end of the extension frame (811) is provided with a shifting rack (818) meshing with a spur gear ring (821); The material vibration unit comprises a positioning guide frame (803) installed on the side of the top plate (805); a guide rod (802) is installed on the side of the movable pull plate (814) away from the extension frame (811); a movable tube (801) is sleeved on the guide rod (802); a test probe (7) is installed at the bottom of the discharge cylinder (807) and extends into the test cylinder (3); a clamping hole (832) is opened on the guide rod (802); a latch (831) extending into the inside of the latching hole (832) is inserted into the outer wall of the movable tube (801); a second return spring (830) connected to the outer wall of the movable tube (801) is arranged on the outer side of the latch (831); and a guide roller (829) located below the positioning guide frame (803) is installed on one end of the second return spring (830) away from the guide rod (802); The discharge member comprises a second one-way valve (834) connected to the bottom of the test cylinder (3) via a connecting pipe, a discharge cylinder (807) is installed at one end of the second one-way valve (834), a first piston rod (808) is inserted into the interior of the discharge cylinder (807), a connecting plate (809) connected to the first piston rod (808) is installed at the bottom end of the shift rack (818), and the first one-way valve (833) is installed on the outer wall of the discharge cylinder (807).

2. The permeability testing device for a reverse osmosis membrane material according to claim 1, characterized in that: The storage tanks (5) are provided in a plurality, and the plurality of storage tanks (5) are all connected to the bottom of the liquid injection cylinder (4) via a connecting pipe, and the plurality of storage tanks (5) are distributed at equal distances along the center of the liquid injection cylinder (4).

3. The permeability testing device for a reverse osmosis membrane material according to claim 1, characterized in that: The liquid inlet of the third one-way valve (835) is connected to the bottom of the liquid injection cylinder (4), and the liquid discharge port of the third one-way valve (835) is connected to the liquid inlet end of the reverse osmosis membrane (6).

4. The permeability testing device for a reverse osmosis membrane material according to claim 1, characterized in that: The length of the shifting rack (818) is equal to the length of the vertical end of the T-shaped plug block (815).

5. The permeability testing device for a reverse osmosis membrane material according to claim 1, characterized in that: The diameter of the end of the latch pin (831) close to the guide rod (802) is equal to the diameter of the clamping hole (832), and the end of the latch pin (831) away from the guide roller (829) is rotatably connected to a ball bearing via a rotating shaft.

6. The permeability testing device for reverse osmosis membrane materials according to claim 1, characterized in that: The water outlet of the second one-way valve (834) is connected to the discharge barrel (807), and the water inlet of the first one-way valve (833) is connected to the discharge barrel (807).

7. A permeability testing device for reverse osmosis membrane materials according to claim 6, characterized in that: The length of the discharge cylinder (807) is equal to the moving distance of the extension frame (811), and the space inside the discharge cylinder (807) is larger than the space inside the test cylinder (3).

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