Reverse osmosis membrane frame structure

Abstract

The invention discloses a reverse osmosis membrane frame structure, and belongs to the technical field of wastewater treatment. Comprising a support frame and filter element mounting cylinders which are oppositely arranged in pairs and are fixed with the support frame; the connecting assembly is arranged between the filter element mounting cylinders which are oppositely arranged, and the opposite unclosed ends of the two filter element mounting cylinders are communicated and closed by the connecting assembly; the pipeline structure is fixed on the support frame and communicated with the filter element mounting cylinder, and the pipeline structure is used for guiding water into the filter element mounting cylinder and guiding the water out of the filter element mounting cylinder; the blocking structure is used for sealing the unsealed end part of the filter element mounting cylinder, and the pipeline structure is communicated with the filter element mounting cylinder through the blocking structure. In the whole switching process, only the connecting assemblies need to be dismounted and adjusted, the whole membrane frame structure does not need to be dismounted, the operation convenience of switching series-parallel connection modes of the membrane frame structure is improved, and then the switching operation difficulty is reduced.

Description

Technical Field

[0001] The invention relates to a reverse osmosis membrane frame structure and belongs to the technical field of wastewater treatment. Background Art

[0002] When using a reverse osmosis membrane, in order to pursue a high rejection rate or high water permeability of reverse osmosis, the reverse osmosis filter element is usually connected in multiple sections in series or in parallel. At this time, according to the different needs of the series and parallel forms, the sleeve part of the filter element placed in the membrane frame is stacked and fixed in the horizontal or vertical direction, and a pipeline structure is used to connect multiple sleeves. Therefore, after the pipeline structure is installed, the sleeve and pipeline structure on the membrane frame are usually not easy to change and adjust. This will make the membrane frame structure more cumbersome when switching the series and parallel modes of the filter elements according to actual working conditions, which increases the difficulty of switching the series and parallel modes. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a reverse osmosis membrane frame structure, which solves the problem in the prior art that after the pipeline structure is installed, when switching the series and parallel modes of the filter elements according to actual working conditions, the operation is cumbersome, which increases the difficulty of switching the series and parallel modes.

[0004] The technical problem to be solved by the present invention is achieved by adopting the following technical solution: a reverse osmosis membrane frame structure, comprising a support frame, The filter element installation cylinders are arranged opposite to each other in pairs, and the filter element installation cylinders are fixed to the support frame; A connecting assembly is arranged between the filter element installation cylinders that are arranged opposite to each other, and the connecting assembly connects and seals the opposite unsealed ends of the two filter element installation cylinders; A pipeline structure is fixed on the support frame and communicated with the filter element installation cylinder, and the pipeline structure is used to introduce water into the filter element installation cylinder and to discharge water in the filter element installation cylinder; The sealing structure seals the unsealed end of the filter element installation cylinder, and the pipeline structure is connected with the filter element installation cylinder through the sealing structure; The water pump is divided into an output end and an input end. The output end of the water pump is connected to the pipeline structure, and the input end of the water pump is connected to a water inlet pipe.

[0005] By adopting the above technical scheme, when the filter elements need to be connected in series, the two relatively arranged filter element mounting cylinders are connected by using a connecting assembly. At this time, the filter elements are inserted into the filter element mounting cylinders in series in sequence, and the ends of the filter element mounting cylinders that are far away from each other are closed by using a sealing structure. The water pump pumps the water from the water inlet pipe into the inside of the filter element mounting cylinder through the pipeline structure, and pure water and concentrated water are generated by filtering the filter element inside the filter element mounting cylinder. The pure water and concentrated water are discharged through different pipeline structures, thereby achieving the purpose of water treatment. When the filter elements need to be connected in parallel, it is only necessary to remove the connecting assembly, so that the relatively arranged filter element mounting cylinders are independent of each other, and the filter elements are respectively inserted into the filter element mounting cylinders, and then the two ends of the filter element mounting cylinders are sealed by using a sealing structure. At this time, it is only necessary to install a new pipeline structure at the opposite ends of the two filter element mounting cylinders to export the pure water and concentrated water. During the entire switching process, it is only necessary to remove and adjust the connecting assembly, and there is no need to remove the entire membrane frame structure, which is conducive to improving the operational convenience of switching the membrane frame structure to series and parallel forms, thereby reducing the difficulty of the switching operation.

[0006] The present invention is further configured as follows: the connection component comprises: The two connecting shells are arranged opposite to each other, and the extending direction of the connecting shells is the same as the axial direction of the filter element installation cylinder; The locking clamps are arranged at both ends of the connection shells, and the locking clamps fix the two connection shells and fix the connection shells to the support frame; The outer sleeve is fixedly arranged on the inner side of the connecting shell; the inner part of the outer sleeve is a hollow structure; The inner sleeve is coaxially arranged on the inner side of the outer sleeve, and the inner side of the inner sleeve is coaxially arranged with: The pure water pipe is coaxially arranged with the inner sleeve, and the following are fixedly arranged between the pure water pipe and the inner wall of the inner sleeve: The throttling orifice plate blocks the space between the pure water pipe and the inner wall of the inner sleeve, and a plurality of throttling holes are penetrated through the throttling orifice plate.

[0007] The present invention is further configured as follows: limit stops are fixedly arranged at both ends of the inner wall of the connecting shell in the circumferential direction of the connecting shell, connecting flanges are arranged at both ends of the inner sleeve in the extension direction, the connecting flanges are abutted against the limit stops, a connecting pipe is arranged on the inner side of the connecting flange and is coaxially abutted against the pure water pipe, a support rod is fixedly connected between the connecting pipe and the connecting flange, and the abutting surface between the connecting pipe and the pure water pipe is sealed.

[0008] By adopting the above technical solution, the two connecting shells are relatively abutted, and then a locking clamp is sleeved on the ends of the two connecting shells to fix the two connecting shells, and then the locking clamp is fixed to the support frame. At this time, the outer sleeve is located on the inner side of the connecting shell, the inner sleeve is located on the inner side of the outer sleeve, the two filter elements are respectively located in the two filter element installation cylinders, and the ends of the filter elements are respectively abutted and connected with the pure water pipes located on both sides of the inner sleeve, and then water is introduced into the filter element installation cylinder through the pipeline structure. After the water is filtered by the filter element, the pure water of the two filter elements is merged and passed through the pure water pipe. The pipeline structure is used for export, and the concentrated water of the two filter elements is combined through the space between the inner side of the inner sleeve and the outer side of the pure water pipe and exported through the pipeline structure, thereby completing the water filtration process. After the water enters the filter element installation cylinder and is filtered by the first filter element, the amount of remaining concentrated water is reduced. Since the inner diameter of the filter element installation cylinder is fixed, the water flow rate is reduced. By setting a throttling orifice plate for throttling, the remaining concentrated water increases its concentrated water flow rate after flowing through the throttling orifice, thereby achieving the purpose of stabilizing the water flow, and further stabilizing the pressure difference between the two filter elements to avoid the situation where the flow at the end of the filter element is too low.

[0009] The present invention is further configured as follows: a plurality of throttling orifice plates are arranged in an array at equal angles along the circumference of the pure water pipe, and both ends of the throttling orifice plates along the extension direction of the pure water pipe are twisted and bent along the circumference of the pure water pipe.

[0010] By adopting the above technical solution, the throttling orifice plate is twisted and bent along the axial direction of the pure water pipe, so that when water flows through the throttling orifice plate, the impact force of the water flow on the throttling orifice plate is reduced, which is beneficial to improving the service life of the throttling orifice plate.

[0011] The present invention is further configured as follows: a through groove is radially penetrated on the connecting shell, and after the two connecting shells are relatively fixed, the through groove forms an inspection channel, and a maintenance cover is detachably fixedly arranged in the inspection channel.

[0012] The present invention is further configured as follows: a portion of the outer sleeve located in the inspection channel is provided with positioning holes and air guide holes in sequence along the axial direction of the outer sleeve, the positioning holes and the air guide holes radially penetrate the outer sleeve, a pipe mounting hole that can be aligned with the air guide hole and a limiting socket that can be aligned with the positioning hole are provided on the inner sleeve, a limiting channel is formed after the positioning hole is aligned with the limiting socket, and a limiting member is arranged in the limiting channel.

[0013] The present invention is further configured as follows: the limiting member comprises: A positioning block is inserted into the positioning hole; A sliding plug is slidably arranged on the end of the positioning block toward the inner sleeve along the direction in which the positioning hole is opened; The elastic block is arranged at the end of the sliding plug inserted into the positioning block and is fixed to the positioning block.

[0014] By adopting the above technical scheme, the positioning block is inserted into the positioning hole and the limiting socket to complete the limiting of the inner sleeve, so that the inner sleeve remains stationary when the filter element mounting tube is in use. When the inside of the filter element mounting tube needs to be cleaned, the sealing structure at the end of the filter element mounting tube is removed, and clean water is introduced into the filter element mounting tube. At this time, the positioning block is pulled out from the positioning hole. Due to the bending state of the throttling orifice plate, the inner sleeve will be driven to rotate under the impact of the water flow. At this time, the throttling orifice plate can disturb the water flow in the filter element mounting tube, which is conducive to the detachment of foreign matter attached to the inner wall of the filter element mounting tube and the throttling orifice plate, thereby improving the cleaning effect of the filter element mounting tube and the throttling orifice plate.

[0015] The present invention is further configured as follows: an air pressure chamber connected to the tube mounting hole is opened in the inner sleeve, the air pressure chamber extends to the inside of the throttle orifice plate and is connected to the throttle hole, a flexible sealing sheet is fixedly arranged at the connection between the air pressure chamber and the throttle hole, an air guide tube is detachably fixedly arranged in the tube mounting hole, and the end of the air guide tube passes through the air guide hole and penetrates the inspection cover to extend to the outside of the inspection channel.

[0016] By adopting the above technical scheme, one end of the air duct located outside the maintenance channel can be connected to the air supply equipment, and the air supply equipment introduces gas into the air pressure chamber through the air duct, so that the air pressure in the air pressure chamber increases and becomes greater than the water pressure inside the inner sleeve. At this time, the flexible sealing piece expands toward the inside of the throttling hole, so that the opening aperture of the throttling hole becomes smaller. Conversely, the air supply equipment draws gas from the air pressure chamber, and the opening aperture of the throttling hole becomes larger, thereby achieving the purpose of adjusting the aperture of the throttling hole. The aperture of the throttling hole can be adjusted according to the actual working conditions of the concentrated water flow in the filter element installation cylinder, further improving the control ability of the water flow stability inside the filter element installation cylinder.

[0017] The present invention is further configured as follows: an inspection hole is provided on the outer sleeve, which radially penetrates the outer sleeve and the inner sleeve, the inspection hole is connected to the interior of the inner sleeve, a sealing block is detachably fixedly connected in the inspection hole, a plurality of mounting slots are provided on an end face of the sealing block away from the outer sleeve, a second through hole is provided in the sealing block, an end of the second through hole facing the interior of the inner sleeve is connected to a first through hole that penetrates the sealing block, the first through hole is connected to the interior of the inner sleeve, an end of the second through hole away from the first through hole is connected to a third through hole, and the sealing block slides axially in the third through hole A pressing plate is provided, and a sealing spring is provided in the third through hole, and two ends of the sealing spring are respectively fixed to the pressing plate and the inner wall of the third through hole, and an auxiliary joint is fixed to the end of the pressing plate away from the second through hole, and a plurality of water guide channels connecting the third through hole with the outside of the blocking block are opened on the auxiliary joint, and a connecting rod is fixed to the side of the pressing plate facing the second through hole, and the end of the connecting rod extends into the second through hole and is fixed with a valve core, and the valve core can respectively abut against the connection between the second through hole and the third through hole and the connection between the second through hole and the first through hole, and the abutment is sealed.

[0018] By adopting the above technical solution, when it is necessary to sample and test the concentrated water between the two filter elements, after the inspection cover is removed, the external pipeline and the auxiliary joint are fixed. At this time, the water guide channel is connected with the external pipeline, and then the connection between the external pipeline and the auxiliary joint is held and pressed in the direction of the outer sleeve. At this time, the pressing plate compresses the sealing spring, and the pressing plate pushes the valve core to the first through hole through the connecting rod, so that the first through hole, the second through hole and the third through hole are connected. At this time, the concentrated water inside the inner sleeve flows to the external pipeline through the first through hole, the second through hole, the third through hole and the water guide channel in turn, so as to achieve the purpose of sampling the concentrated water. When the pressure on the pressing plate is released, the sealing spring resets the pressing plate under the elastic action, and at the same time pulls the valve core to abut against the connection between the third through hole and the second through hole through the connecting rod, so that the third through hole and the second through hole are sealed and separated, and then the inspection cover can be reinstalled and fixed.

[0019] The present invention is further configured as follows: sealing grooves are provided on opposite surfaces of the two connecting shells, and sealing strips are inserted into the sealing grooves.

[0020] By adopting the above technical solution, sealing strips are arranged on the opposite surfaces of the connecting shells, thereby improving the sealing of the contact surfaces after the connecting shells abut against each other, and avoiding water leakage after the connecting shells are fixed.

[0021] The beneficial effect of the present invention is that when the filter elements need to be connected in series, a connecting assembly is used to connect the two relatively arranged filter element mounting cylinders. At this time, the filter elements are inserted into the filter element mounting cylinders in series in sequence, and a sealing structure is used to seal the ends of the filter element mounting cylinders that are far away from each other. The water pump pumps the water in the water inlet pipe into the interior of the filter element mounting cylinder through the pipeline structure, and pure water and concentrated water are generated by filtration of the filter element inside the filter element mounting cylinder. The pure water and concentrated water are discharged through different pipeline structures, thereby achieving the purpose of water treatment. When the filter elements need to be connected in parallel, it is only necessary to remove the connecting assembly, so that the relatively arranged filter element mounting cylinders are independent of each other, and the filter elements are respectively inserted into the filter element mounting cylinders, and then the two ends of the filter element mounting cylinders are sealed by the sealing structure. At this time, it is only necessary to install new pipeline structures at the opposite ends of the two filter element mounting cylinders to export the pure water and concentrated water. During the entire switching process, it is only necessary to remove and adjust the connecting assembly, and there is no need to remove the entire membrane frame structure, which is beneficial to improving the operational convenience of switching the membrane frame structure to series and parallel forms, thereby reducing the difficulty of the switching operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure when the filter element installation cylinder of the present invention is connected in series using a connecting assembly; Figure 2 This is a schematic diagram of the structure of the filter element installation cylinder in the present invention when the connection assembly is not used in series; Figure 3 It is a structural cross-sectional view of the filter element installation cylinder and the connecting assembly in the present invention; Figure 4 for Figure 3 A magnified view of the structure at center A; Figure 5 It is a structural exploded diagram of the connection assembly in the present invention; Figure 6 It is a structural schematic diagram of the connection assembly in the present invention; Figure 7 It is a structural schematic diagram of the blocking block in the present invention; Figure 8 It is a structural cross-sectional view of the throttling hole in the present invention.

[0023] In the figure: 10, chassis; 11, main bracket; 12, interface module; 13, water inlet pipe; 14, secondary treatment tank; 15, water pump; 16, filter element installation cylinder; 17, sealing end cover; 18, installation clamp; 19, intermediate pipe; 20, clean water pipe; 21, concentrated water pipe; 23, connecting shell; 24, locking clamp; 25, maintenance cover; 26, sealing groove; 27, sealing strip; 28, limit stopper; 29, deformation groove; 30, outer sleeve; 31, positioning hole; 32, air guide hole; 33, inspection hole; 34, inner sleeve; 35, pure water pipe; 36, Orifice plate; 37, connecting flange; 38, joint pipe; 39, support rod; 40, through groove; 41, sliding groove; 42, limit socket; 43, pipe mounting hole; 44, air guide pipe; 45, positioning block; 46, sliding plug; 47, elastic block; 48, air pressure chamber; 49, flexible sealing sheet; 50, throttling hole; 51, sealing block; 52, first through hole; 53, second through hole; 54, third through hole; 55, valve core; 56, connecting rod; 57, mounting slot; 58, pressing plate; 59, auxiliary joint; 60, water channel; 61, sealing spring. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the following is a brief introduction Figures 1 to 8 The present invention is further described.

[0025] like Figure 1 to Figure 2As shown, a reverse osmosis membrane frame structure includes a support frame, a water pump 15, a filter element installation barrel 16, a connecting assembly, a pipeline structure and a blocking structure. The support frame includes a base frame 10 and a main bracket 11. The main bracket 11 is vertically fixed on the base frame 10. The main bracket 11 is also fixedly provided with an interface module 12, and the interface module 12 is connected to the pipeline structure. The filter element installation barrels 16 are grouped in pairs and arranged oppositely. The filter element installation barrels 16 support frame is fixed. The filter element installation barrels 16 of adjacent groups are stacked vertically. The connecting assembly is arranged between the filter element installation barrels 16 arranged oppositely. The connecting assembly connects and closes the opposite unclosed ends of the two filter element installation barrels 16. The pipeline structure is fixed on the support frame and connected with the filter element installation barrel 16. The pipeline structure is used to introduce water into the filter element installation barrel 16 and to guide the water in the filter element installation barrel 16 out. The blocking structure closes the unclosed end of the filter element installation barrel 16, and the pipeline structure is connected with the filter element installation barrel 16 through the blocking structure. The pipeline structure includes an intermediate pipe 19, a clean water pipe 20 and a concentrated water pipe 21. The sealing structure includes a sealing end cover 17 and a mounting hoop 18. The sealing end cover 17 is inserted into the end of the filter element mounting tube 16 to close the opening of the filter element mounting tube 16. The mounting hoop 18 is fixed at the connection between the filter element mounting tube 16 and the sealing end cover 17. The mounting hoop 18 presses and seals the connection between the filter element mounting tube 16 and the sealing end cover 17. The intermediate tube 19 is connected to the filter element mounting barrel 16 and connects the ends of two groups of vertically parallel filter element mounting barrels 16 in series. The end of the intermediate tube 19 is detachably fixedly connected to the sealing end cover 17. The intermediate tube 19 is located on the eccentric side of the sealing end cover 17. One end of the concentrated water pipe 21 is connected to the end of the filter element mounting barrel 16 that is not connected in series. The connecting end of the concentrated water pipe 21 and the filter element mounting barrel 16 is detachably fixedly arranged on the sealing end cover 17. The concentrated water pipe 21 is located on the eccentric side of the sealing end cover 17. The clean water pipe 20 is respectively connected to one end of the filter element mounting barrel 16. The clean water pipe 20 is detachably fixedly connected to the sealing end cover 17. The clean water pipe 20 is coaxially arranged with the sealing end cover 17. After the reverse osmosis membrane filter element is inserted into the filter element mounting barrel 16, the interior of the filter element mounting barrel 16 is divided into a concentrated water end and a pure water end, wherein the pure water end is connected to the clean water pipe 20, and the concentrated water end is connected to the intermediate tube 19 or the concentrated water pipe 21. The end of the clean water pipe 20 away from the filter element installation cylinder 16 can be optionally installed with a secondary treatment tank 14, which is fixed to the main bracket 11 and is used to improve the taste of pure water. The water pump 15 is divided into an output end and an input end. The output end of the water pump 15 is connected to the intermediate pipe 19 in the pipeline structure, and the input end of the water pump 15 is connected to the water inlet pipe 13, which is connected to the external wastewater storage device. External wastewater is introduced into the water pump 15 through the water inlet pipe 13. After the water pump 15 is started, the water is pumped into several filter element installation cylinders 16 through the intermediate pipe 19.

[0026] like Figures 3 to 5As shown, the connection assembly includes a connection shell 23, a locking clamp 24, an outer sleeve 30 and an inner sleeve 34. The two connection shells 23 are arranged opposite to each other. The extension direction of the connection shell 23 is the same as the axial direction of the filter element installation cylinder 16. The opposite sides of the two connection shells 23 are hollow structures. When the opposite sides of the two connection shells 23 are abutted, the hollow structures of the two connection shells 23 are merged into a complete cylindrical cavity. The opposite surfaces of the two connection shells 23 are provided with a sealing groove 26, and a sealing strip 27 is inserted into the sealing groove 26. By arranging the sealing strip 27 on the opposite surfaces of the connection shells 23, the sealing of the contact surface of the connection shells 23 after abutment is improved, and water leakage is avoided after the connection shells 23 are fixed. The locking clamp 24 is arranged at both ends of the connection shell 23. The locking clamp 24 clamps and fixes the opposite sides of the two connection shells 23 after abutment, and fixes the connection shell 23 to the support frame. The connecting shell 23 has a deformation groove 29 on the opposite side thereof. The deformation groove 29 is aligned with the installation position of the locking hoop 24 along the radial direction of the connecting shell 23. When the locking hoop 24 presses the connecting shell 23, the deformation groove 29 is slightly deformed, so that the connection between the two connecting shells 23 is more tightly connected. The outer sleeve 30 is fixedly arranged on the inner side of the connecting shell 23, and the inner part of the outer sleeve 30 is hollow so that the outer sleeve 30 forms a hollow sleeve structure. The inner sleeve 34 is coaxially rotatably arranged on the inner side of the outer sleeve 30, and a sliding groove 41 is provided on the outer curved surface of the inner sleeve 34 in the circumferential direction. The outer sleeve 30 is provided with a protrusion extending into the sliding groove 41 to ensure that the inner sleeve 34 and the outer sleeve 30 will not be axially displaced. A pure water pipe 35 is coaxially arranged on the inner side of the inner sleeve 34, and a throttling orifice plate 36 is fixedly arranged between the pure water pipe 35 and the inner wall of the inner sleeve 34. The throttling orifice plate 36 blocks the space between the pure water pipe 35 and the inner wall of the inner sleeve 34, and a plurality of throttling holes 50 are penetrated and opened on the throttling orifice plate 36. A plurality of throttling orifice plates 36 are arranged in an array of equal angles along the circumference of the pure water pipe 35, and the two ends of the throttling orifice plates 36 along the extension direction of the pure water pipe 35 are twisted and bent along the circumference of the pure water pipe 35. By twisting and bending the throttling orifice plate 36 along the axial direction of the pure water pipe 35, when the water flows through the throttling orifice plate 36, the impact force of the water flow on the throttling orifice plate 36 is reduced, which is beneficial to improving the service life of the throttling orifice plate 36.

[0027] like Figure 3 and Figure 5As shown, limit stops 28 are fixedly provided at both ends of the inner wall of the connecting shell 23 in the circumferential direction around the connecting shell 23, and connecting flanges 37 are provided at both ends of the extension direction of the inner sleeve 34, the connecting flanges 37 are abutted against the limit stops 28, and a joint pipe 38 is provided on the inner side of the connecting flange 37 to abut against the pure water pipe 35 coaxially, and a support rod 39 is fixedly connected between the joint pipe 38 and the connecting flange 37, and the abutting surface of the joint pipe 38 and the pure water pipe 35 is sealed. After the filter element is inserted into the filter element mounting cylinder 16, the end of the pipe for the filter element to output pure water is sealed and abutted or plugged with the joint pipe 38, and the part of the filter element to output concentrated water is connected to the space between the connecting flange 37 and the joint pipe 38.

[0028] like Figures 3 to 8 As shown, a through slot 40 is radially penetrated on the connecting shell 23. After the two connecting shells 23 are relatively fixed, the through slot 40 forms an inspection channel, and an inspection cover 25 is detachably fixedly arranged in the inspection channel. The outer sleeve 30 is provided with a positioning hole 31 and an air guide hole 32 in sequence along the axial direction of the outer sleeve 30. The positioning hole 31 and the air guide hole 32 radially penetrate the outer sleeve 30. The inner sleeve 34 is provided with a pipe mounting hole 43 that can be aligned with the air guide hole 32 and a limit plug hole 42 that can be aligned with the positioning hole 31. After the positioning hole 31 is aligned with the limit plug hole 42, a limit channel is formed, and a limit member is arranged in the limit channel. The limiting member includes a positioning block 45, a sliding plug 46 and an elastic block 47. The positioning block 45 is inserted into the positioning hole 31. The sliding plug 46 is slidably arranged at the end of the positioning block 45 facing the inner sleeve 34 along the direction of the positioning hole 31. The elastic block 47 is arranged at the end of the sliding plug 46 inserted into the positioning block 45 and fixed to the positioning block 45. The elastic block 47 is compressed and deformed after being subjected to pressure. An air pressure chamber 48 connected to the tube mounting hole 43 is opened in the inner sleeve 34. The air pressure chamber 48 extends to the inside of the throttle orifice plate 36 and is connected to the throttle hole 50. A flexible sealing piece 49 is fixedly arranged at the connection between the air pressure chamber 48 and the throttle hole 50. An air guide pipe 44 is detachably fixedly arranged in the tube mounting hole 43. The end of the air guide pipe 44 passes through the air guide hole 32 and penetrates the inspection cover 25 to extend to the outside of the inspection channel.

[0029] like Figure 4 and Figure 7As shown, the outer sleeve 30 is provided with an inspection hole 33 which radially penetrates the outer sleeve 30 and the inner sleeve 34. The inspection hole 33 is connected with the interior of the inner sleeve 34, and a sealing block 51 is detachably fixedly connected in the inspection hole 33. According to the actual working conditions, a conventional plug can be selected to close the inspection hole 33, or a sealing block 51 can be used to close it. The sealing block 51 is provided with a plurality of installation slots 57 on the end face away from the outer sleeve 30, and a second through hole 53 is provided in the sealing block 51. The end of the second through hole 53 facing the interior of the inner sleeve 34 is connected with a first through hole 52 which penetrates the sealing block 51. The first through hole 52 is connected with the interior of the inner sleeve 34, and the end of the second through hole 53 away from the first through hole 52 is connected with a third through hole 54. A pressing plate 58 is provided in the third through hole 54 to extend the axial sliding of the sealing block 51, and a sealing spring 61 is provided in the third through hole 54. The two ends of the sealing spring 61 are respectively connected with the pressing plate 58. The pressing plate 58 is fixed to the inner wall of the third through hole 54, and an auxiliary joint 59 is fixed to the end of the pressing plate 58 away from the second through hole 53. The auxiliary joint 59 is provided with a plurality of water guide channels 60 connecting the third through hole 54 with the outside of the blocking block 51. A connecting rod 56 is fixed to the side of the pressing plate 58 facing the second through hole 53. The end of the connecting rod 56 extends into the second through hole 53 and is fixed with a valve core 55. The valve core 55 can respectively abut against the connection between the second through hole 53 and the third through hole 54 and the connection between the second through hole 53 and the first through hole 52, and the abutment is sealed.

[0030] When the filter elements need to be connected in series, a connecting assembly is used to connect the two relatively arranged filter element mounting barrels 16. At this time, the filter elements are inserted into the filter element mounting barrels 16 in series in sequence, and a sealing structure is used to seal the ends of the filter element mounting barrels 16 that are away from each other. The water pump 15 pumps the water from the water inlet pipe 13 into the filter element mounting barrel 16 through the pipeline structure. Pure water and concentrated water are generated by filtering the filter element inside the filter element mounting barrel 16. The pure water and concentrated water are discharged through different pipeline structures, thereby achieving the purpose of water treatment. When the filter elements need to be connected in parallel, only the connecting assembly needs to be removed, so that the relatively arranged filter element mounting barrels 16 are independent of each other, and filter elements are respectively inserted into the filter element mounting barrels 16, and then the two ends of the filter element mounting barrel 16 are sealed using the sealing structure. At this time, only a new pipeline structure needs to be installed at the opposite ends of the two filter element mounting barrels 16 to export the pure water and concentrated water. The new pipeline structure can be connected to the pure water output end and the concentrated water output end of the filter element according to the actual working conditions. During the entire switching process, it is only necessary to dismantle and adjust the connecting components without dismantling the entire membrane frame structure, which is conducive to improving the operational convenience of switching the membrane frame structure in series and parallel forms, thereby reducing the difficulty of the switching operation.

[0031] The two connecting shells 23 are relatively butted against each other, and then the locking clamp 24 is sleeved on the ends of the two connecting shells 23 to fix the two connecting shells 23, and then the locking clamp 24 is fixed to the support frame. At this time, the outer sleeve 30 is located on the inner side of the connecting shell 23, and the inner sleeve 34 is located on the inner side of the outer sleeve 30. The two filter elements are respectively located in the two filter element installation cylinders 16, and the ends of the filter elements are respectively butted against and connected with the pure water pipes 35 located on both sides of the inner sleeve 34, and then water is introduced into the filter element installation cylinder 16 through the pipeline structure. After the water is filtered by the filter element, the pure water of the two filter elements is merged through the pure water pipe 35 The concentrated water of the two filter elements is discharged through the pipeline structure, and is merged through the space between the inner side of the inner sleeve 34 and the outer side of the pure water pipe 35 and discharged through the pipeline structure, thereby completing the water filtration process. After the water enters the filter element installation cylinder 16 and is filtered by the first filter element, the amount of remaining concentrated water is reduced. Since the inner diameter of the filter element installation cylinder 16 is fixed, the water flow rate is reduced. By setting a throttling orifice plate 36 for throttling, the remaining concentrated water increases its concentrated water flow rate after flowing through the throttling hole 50, thereby achieving the purpose of stabilizing the water flow, and further stabilizing the pressure difference between the two filter elements, avoiding the situation where the flow rate at the end of the filter element is too low.

[0032] The inner sleeve 34 is limited by inserting the positioning block 45 into the positioning hole 31 and the limiting socket 42, so that the inner sleeve 34 remains stationary when the filter element mounting barrel 16 is in use. When the inside of the filter element mounting barrel 16 needs to be cleaned, the sealing structure at the end of the filter element mounting barrel 16 is removed, and clean water is introduced into the filter element mounting barrel 16. At this time, the positioning block 45 is pulled out from the positioning hole 31. Due to the bending state of the throttling orifice plate 36, the inner sleeve 34 will be driven to rotate under the impact of the water flow. At this time, the throttling orifice plate 36 can disturb the water flow in the filter element mounting barrel 16, which is beneficial to the detachment of foreign matter attached to the inner wall of the filter element mounting barrel 16 and the throttling orifice plate 36, thereby improving the cleaning effect of the filter element mounting barrel 16 and the throttling orifice plate 36. When cleaning is about to end, the cleaning water flow gradually decreases. At this time, the rotation speed of the inner sleeve 34 is reduced, and the positioning block 45 is reinserted into the positioning hole 31. At this time, since the limiting socket 42 is not aligned with the positioning hole 31, the end of the sliding plug 46 abuts against the surface of the inner sleeve 34, and the elastic block 47 is compressed under the action of pressure. When the limiting socket 42 is aligned with the positioning hole 31, the elastic block 47 presses the sliding plug 46 into the limiting socket 42 under the action of elasticity. At this time, the sliding plug 46 locks the inner sleeve 34 and the outer sleeve 30 and limits them. The inner sleeve 34 cannot continue to move, so that the inner sleeve 34 can continue to be used.

[0033] One end of the air duct 44 located outside the maintenance channel can be connected to the air supply equipment. The air supply equipment introduces gas into the air pressure chamber 48 through the air duct 44, so that the air pressure in the air pressure chamber 48 increases and becomes greater than the water pressure inside the inner sleeve 34. At this time, the flexible sealing piece 49 expands toward the inside of the throttling hole 50, so that the opening aperture of the throttling hole 50 becomes smaller. Conversely, the air supply equipment extracts gas from the air pressure chamber 48, and the opening aperture of the throttling hole 50 becomes larger, thereby achieving the purpose of adjusting the aperture of the throttling hole 50. The aperture of the throttling hole 50 can be adjusted according to the actual working conditions of the concentrated water flow in the filter element mounting cylinder 16, further improving the control ability of the water flow stability inside the filter element mounting cylinder 16.

[0034] When it is necessary to sample and test the concentrated water between the two filter elements, after removing the inspection cover 25, fix the external pipeline and the auxiliary joint 59, at this time, the water guide channel 60 is connected with the external pipeline, and then hold the connection between the external pipeline and the auxiliary joint 59 and press it in the direction of the outer sleeve 30, at this time, the pressing plate 58 compresses the sealing spring 61, and the pressing plate 58 pushes the valve core 55 to the first through hole 52 through the connecting rod 56, so that the first through hole 52, the second through hole 53 and the third through hole 54 are connected, and the inner sleeve The concentrated water inside the inner sleeve 34 flows to the external pipeline through the first through hole 52, the second through hole 53, the third through hole 54 and the water guide channel 60 in sequence, so as to achieve the purpose of sampling the concentrated water. When the pressing of the pressing plate 58 is released, the sealing spring 61 resets the pressing plate 58 under the elastic action, and at the same time pulls the valve core 55 to abut against the connection between the third through hole 54 and the second through hole 53 through the connecting rod 56, so that the third through hole 54 and the second through hole 53 are sealed and separated, and then the inspection cover 25 is reinstalled and fixed. If the sliding path of the pressing plate 58 is interfered by foreign matter and cannot be reset during the pressing of the pressing plate 58, the pressing plate 58 is further pressed to make the valve core 55 abut against the connection between the first through hole 52 and the inner sleeve 34. At this time, the inner sleeve 34 can also be temporarily sealed and separated, so as to avoid the situation that the pressing plate 58 cannot be reset and the concentrated water in the inner sleeve 34 is continuously discharged.

[0035] If it is necessary to clean the connection component separately, insert the external plug plate into the installation slot 57, and then use pliers, wrenches and other tools to clamp the plug plate and rotate it to screw the blocking block 51 out of the inspection hole 33, and then insert a conduit connected to the external water supply equipment into the inspection hole 33, and inject cleaning liquid into the inspection hole 33 through the conduit to clean the connection component. After cleaning, screw the blocking block 51 back into the inspection hole 33 and install and fix the inspection cover 25.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A reverse osmosis membrane frame structure, characterized in that: Including support frame, The filter element mounting cylinders (16) are arranged opposite to each other in pairs, and the filter element mounting cylinders (16) are fixed to the support frame; A connecting component is arranged between the filter element installation cylinders (16) arranged opposite to each other, and the connecting component connects and seals the opposite unsealed ends of the two filter element installation cylinders (16); a pipeline structure, fixed on the support frame and connected to the filter element installation cylinder (16), the pipeline structure being used to introduce water into the filter element installation cylinder (16) and to discharge water in the filter element installation cylinder (16); A sealing structure is used to seal the unsealed end of the filter element installation cylinder (16), and the pipeline structure is connected to the filter element installation cylinder (16) through the sealing structure; The water pump (15) is divided into an output end and an input end. The output end of the water pump (15) is connected to the pipeline structure, and the input end of the water pump (15) is connected to a water inlet pipe (13).

2. A reverse osmosis membrane frame structure according to claim 1, characterized in that: Connectivity components include A connecting housing (23), wherein the two connecting housings (23) are arranged opposite to each other, and the extending direction of the connecting housings (23) is the same as the axial direction of the filter element mounting cylinder (16); Locking hoops (24) are arranged at both ends of the connection housing (23), and the locking hoops (24) fix the two connection housings (23) and fix the connection housings (23) and the support frame; The outer sleeve (30) is fixedly arranged on the inner side of the connecting shell (23); the inner part of the outer sleeve (30) is a hollow structure; The inner sleeve (34) is coaxially rotatably arranged on the inner side of the outer sleeve (30), and the inner side of the inner sleeve (34) is coaxially arranged with The pure water pipe (35) is coaxially arranged with the inner sleeve (34), and a The throttling orifice plate (36) blocks the space between the pure water pipe (35) and the inner wall of the inner sleeve (34), and a plurality of throttling holes (50) are formed through the throttling orifice plate (36).

3. A reverse osmosis membrane frame structure according to claim 2, characterized in that: Limiting blocks (28) are fixedly arranged at both ends of the inner wall of the connecting shell (23) in the circumferential direction of the connecting shell (23), and connecting flanges (37) are arranged at both ends of the inner sleeve (34) in the extending direction. The connecting flanges (37) are in contact with the limiting blocks (28), and a joint pipe (38) is arranged on the inner side of the connecting flange (37) and is coaxially in contact with the pure water pipe (35). A support rod (39) is fixedly connected between the joint pipe (38) and the connecting flange (37), and the contact surface between the joint pipe (38) and the pure water pipe (35) is sealed.

4. A reverse osmosis membrane frame structure according to claim 2, characterized in that: A plurality of throttling orifice plates (36) are arranged in an array at equal angles along the circumference of the pure water pipe (35), and both ends of the throttling orifice plates (36) along the extension direction of the pure water pipe (35) are twisted and bent along the circumference of the pure water pipe (35).

5. A reverse osmosis membrane frame structure according to claim 2, characterized in that: A through slot (40) is radially penetrated on the connecting shell (23); after the two connecting shells (23) are relatively fixed, the through slot (40) forms an inspection channel, and a maintenance cover (25) is detachably fixedly provided in the inspection channel.

6. A reverse osmosis membrane frame structure according to claim 5, characterized in that: A portion of the outer sleeve (30) located in the inspection channel is provided with a positioning hole (31) and an air guide hole (32) in sequence along the axial direction of the outer sleeve (30); the positioning hole (31) and the air guide hole (32) radially penetrate the outer sleeve (30); the inner sleeve (34) is provided with a pipe mounting hole (43) that can be aligned with the air guide hole (32) and a limiting plug hole (42) that can be aligned with the positioning hole (31); after the positioning hole (31) and the limiting plug hole (42) are aligned, a limiting channel is formed, and a limiting member is arranged in the limiting channel.

7. A reverse osmosis membrane frame structure according to claim 6, characterized in that: Limiting parts include A positioning block (45) is inserted into the positioning hole (31); A sliding plug (46) is slidably disposed along the direction in which the positioning hole (31) is opened, at the end of the positioning block (45) facing the inner sleeve (34); The elastic block (47) is arranged at the end of the sliding plug (46) inserted into the positioning block (45) and is fixed to the positioning block (45).

8. A reverse osmosis membrane frame structure according to claim 6, characterized in that: An air pressure chamber (48) is provided in the inner sleeve (34) and is connected to the tube mounting hole (43). The air pressure chamber (48) extends to the inside of the throttle orifice plate (36) and is connected to the throttle orifice (50). A flexible sealing sheet (49) is fixedly provided at the connection point between the air pressure chamber (48) and the throttle orifice (50). An air guide tube (44) is detachably fixedly provided in the tube mounting hole (43). The end of the air guide tube (44) passes through the air guide hole (32), penetrates the inspection cover (25), and extends to the outside of the inspection channel.

9. A reverse osmosis membrane frame structure according to claim 6, characterized in that: The outer sleeve (30) is provided with an inspection hole (33) which radially penetrates the outer sleeve (30) and the inner sleeve (34); the inspection hole (33) is connected to the interior of the inner sleeve (34); a sealing block (51) is detachably fixedly connected in the inspection hole (33); a plurality of mounting slots (57) are provided on an end surface of the sealing block (51) away from the outer sleeve (30); a second through hole (53) is provided in the sealing block (51); an end of the second through hole (53) facing the interior of the inner sleeve (34) is connected to a first through hole (52) which penetrates the sealing block (51); the first through hole (52) is connected to the interior of the inner sleeve (34); an end of the second through hole (53) away from the first through hole (52) is connected to a third through hole (54); a pressing member is provided in the third through hole (54) which extends axially and slides along the sealing block (51) The pressing plate (58) is provided with a sealing spring (61) in the third through hole (54), and the two ends of the sealing spring (61) are respectively fixed to the pressing plate (58) and the inner wall of the third through hole (54); an auxiliary joint (59) is fixed to the end of the pressing plate (58) away from the second through hole (53); a plurality of water guide channels (60) are provided on the auxiliary joint (59) for connecting the third through hole (54) with the outside of the blocking block (51); a connecting rod (56) is fixed to the side of the pressing plate (58) facing the second through hole (53); the end of the connecting rod (56) extends into the second through hole (53) and is fixed with a valve core (55); the valve core (55) can respectively abut against the connection between the second through hole (53) and the third through hole (54) and the connection between the second through hole (53) and the first through hole (52), and the abutment is sealed.

10. A reverse osmosis membrane frame structure according to claim 2, characterized in that: Sealing grooves (26) are provided on opposite surfaces of the two connecting shells (23), and sealing strips (27) are inserted into the sealing grooves (26).

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