A reverse osmosis membrane rack structure

Abstract

The present invention discloses a reverse osmosis membrane rack structure, belonging to the technical field of wastewater treatment. It includes a support frame, and filter element installation cylinders which are arranged in pairs opposite to each other, and the filter element installation cylinders are fixed to the support frame; a connection assembly which is arranged between the relatively arranged filter element installation cylinders, and the connection assembly connects and seals the unclosed ends of the two filter element installation cylinders opposite to each other; a pipeline structure which is fixed on the support frame and communicates with the filter element installation cylinders, and the pipeline structure is used for introducing water into the filter element installation cylinders and discharging the water in the filter element installation cylinders; a blocking structure which seals the unclosed ends of the filter element installation cylinders, and the pipeline structure communicates with the filter element installation cylinders through the blocking structure. During the entire switching process of the present invention, only the connection assembly needs to be removed and adjusted, and there is no need to remove the entire membrane rack structure, which is beneficial to improving the operation convenience of switching the series-parallel form of the membrane rack structure, and further reducing the difficulty of the switching operation.

Description

Technical Field

[0001] The present invention relates to a reverse osmosis membrane frame structure, belonging 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 in a form of multi-stage series or parallel connection. At this time, according to the different series-parallel forms, the sleeve part for placing the filter element in the membrane frame needs to be stacked and fixed horizontally or vertically, and a pipeline structure is used to connect multiple sleeves. Therefore, after the pipeline structure is installed, the sleeves and pipeline structure on the membrane frame are usually not easy to be modified and adjusted. This will make the operation more cumbersome when switching the series-parallel mode of the filter element according to the actual working conditions, and increase the operation difficulty of switching the series-parallel mode. 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 that in the prior art, after the pipeline structure is installed, when switching the series-parallel mode of the filter element according to the actual working conditions, the operation is more cumbersome and the operation difficulty of switching the series-parallel mode is increased.

[0004] The technical problem to be solved by the present invention is achieved by the following technical solutions: a reverse osmosis membrane frame structure, including a support frame,

[0005] Filter element installation cylinders, arranged in pairs opposite to each other, and the filter element installation cylinders are fixed to the support frame;

[0006] Connection components, arranged between the relatively arranged filter element installation cylinders, and the connection components connect and seal the relatively unclosed ends of the two filter element installation cylinders;

[0007] Pipeline structure, fixed on the support frame and communicating with the filter element installation cylinders, and the pipeline structure is used to introduce water into the filter element installation cylinders and export the water in the filter element installation cylinders;

[0008] Blocking structure, sealing the unclosed ends of the filter element installation cylinders, and the pipeline structure communicates with the filter element installation cylinders through the blocking structure;

[0009] Water pump, divided into an output end and an input end, the output end of the water pump is communicated with the pipeline structure, and a water inlet pipe is communicated with the input end of the water pump.

[0010] By adopting the above technical solution, when the filter elements need to be connected in series, the connecting component is used to connect two oppositely arranged filter element mounting cylinders. At this time, the filter elements are inserted into the filter element mounting cylinders in series in sequence, and the blocking structure is used to seal the mutually remote ends of the filter element mounting cylinders. 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 through the filtration of the filter elements inside the filter element mounting cylinder. The pure water and concentrated water are discharged through different pipeline structures, so as to achieve the purpose of water treatment. When the filter elements need to be connected in parallel, only the connecting component needs to be removed to make the oppositely arranged filter element mounting cylinders independent of each other, and filter elements are respectively inserted into the filter element mounting cylinders, and then the blocking structure is used to block the two ends of the filter element mounting cylinders. At this time, only a new pipeline structure needs to be installed at the opposite ends of the two filter element mounting cylinders to lead out the pure water and concentrated water. During the whole switching process, only the connecting component needs to be removed and adjusted, and there is no need to remove the whole membrane frame structure, which is beneficial to improving the operation convenience of switching the series-parallel form of the membrane frame structure, and further reducing the difficulty of the switching operation.

[0011] The present invention is further provided that: the connecting component includes:

[0012] A connecting shell, two connecting shells are oppositely arranged, and the extending direction of the connecting shell is the same as the axial direction of the filter element mounting cylinder;

[0013] A locking hoop, which is arranged at both ends of the connecting shell, and the locking hoop fixes the two connecting shells and fixes the connecting shell to the support frame;

[0014] An outer sleeve, which is fixedly arranged inside the connecting shell; the inside of the outer sleeve is a hollow structure;

[0015] An inner sleeve, which is coaxially rotatably arranged inside the outer sleeve, and coaxially arranged inside the inner sleeve are:

[0016] A pure water pipe, which is coaxially arranged with the inner sleeve, and fixedly arranged between the pure water pipe and the inner wall of the inner sleeve is:

[0017] A throttle orifice plate, which blocks the space between the pure water pipe and the inner wall of the inner sleeve, and a plurality of throttle orifices are penetrated through the throttle orifice plate.

[0018] The present invention is further provided that: at both ends of the inner wall of the connecting shell, limit blocks are fixedly arranged around the circumference of the connecting shell, connection flanges are arranged at both ends of the extending direction of the inner sleeve, the connection flanges are abutted against the limit blocks, a joint pipe coaxially abutted against the pure water pipe is arranged inside the connection flange, a support rod is fixedly connected between the joint pipe and the connection flange, and the abutting surface between the joint pipe and the pure water pipe is sealed.

[0019] By adopting the above technical solution, the two connection shells are abutted against each other, and then a locking hoop is sleeved on the ends of the two connection shells to fix the two connection shells. Then, the locking hoop is fixed to the support frame. At this time, the outer sleeve is located inside the connection shell, the inner sleeve is located inside 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 communicated with the pure water pipes on both sides of the inner sleeve. Then, water is introduced into the filter element installation cylinder through the pipeline structure. After the water is filtered by the filter elements, the pure water of the two filter elements is merged through the pure water pipes and exported through the pipeline structure. The concentrated water of the two filter elements is merged 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, thus completing the filtration treatment of water. After the water enters the filter element installation cylinder and is filtered by the first filter element, the amount of the remaining concentrated water decreases. Since the inner diameter of the filter element installation cylinder is fixed, the water flow rate decreases. By setting the throttle orifice plate for throttling, the flow rate of the remaining concentrated water is increased after flowing through the throttle orifice, so as to achieve the purpose of stabilizing the water flow, and further the pressure difference between the two filter elements can be stabilized, avoiding the situation of too low flow rate at the end of the filter element.

[0020] The present invention is further configured as follows: a plurality of throttle orifice plates are arranged at equal angles in the circumferential direction of the pure water pipe, and both ends of the throttle orifice plate in the extending direction of the pure water pipe are twisted and bent in the circumferential direction of the pure water pipe.

[0021] By adopting the above technical solution, through the torsional bending of the throttle orifice plate in the axial direction of the pure water pipe, when the water flows through the throttle orifice plate, the water flow impact force received by the throttle orifice plate is reduced, which is beneficial to improving the service life of the throttle orifice plate.

[0022] The present invention is further configured as follows: a through groove is radially penetrated on the connection shell. After the two connection shells are fixed relative to each other, the through groove forms a maintenance channel, and a maintenance cover is detachably and fixedly arranged in the maintenance channel.

[0023] The present invention is further configured as follows: on the part of the outer sleeve located in the maintenance channel, a positioning hole and an air guide hole are sequentially arranged in the axial direction of the outer sleeve. The positioning hole and the air guide hole penetrate the outer sleeve radially. A pipe installation hole capable of aligning with the air guide hole and a limit jacking hole capable of aligning with the positioning hole are arranged on the inner sleeve. After the positioning hole and the limit jacking hole are aligned, a limit channel is formed and a limiting member is arranged in the limit channel.

[0024] The present invention is further configured as follows: the limiting member includes:

[0025] A positioning block inserted into the positioning hole;

[0026] A sliding plug slidably arranged at the end of the positioning block facing the inner sleeve in the opening direction of the positioning hole;

[0027] An elastic block arranged at the end of the sliding plug inserted into the positioning block and fixed to the positioning block.

[0028] By adopting the above technical solution, the positioning block is inserted into the positioning hole and the limit jack, and the limit of the inner sleeve is completed, so that the inner sleeve remains stationary when the filter element installation cylinder is used. When it is necessary to clean the inside of the filter element installation cylinder, the blocking structure at the end of the filter element installation cylinder is removed, and clean water is introduced into the filter element installation cylinder. At this time, the positioning block is pulled out of the positioning hole. Due to the bending state of the throttle orifice plate, the inner sleeve will be driven to rotate under the impact of water flow. At this time, the throttle orifice plate can disturb the water flow in the filter element installation cylinder, which is beneficial to the detachment of foreign matters attached to the inner wall of the filter element installation cylinder and the throttle orifice plate, and improves the cleaning effect of the filter element installation cylinder and the throttle orifice plate.

[0029] The present invention is further configured as follows: an air pressure chamber communicating with the pipe installation hole is provided in the inner sleeve, the air pressure chamber extends into the throttle orifice plate and communicates with the throttle orifice, a flexible blocking piece is fixedly provided at the connection of the air pressure chamber and the throttle orifice, a guide air pipe is detachably and fixedly provided in the pipe installation hole, and the end of the guide air pipe extends to the outside of the maintenance channel through the air guide hole through the maintenance cover.

[0030] By adopting the above technical solution, one end of the guide air pipe located outside the maintenance channel can be connected to the air supply device. The air supply device introduces gas into the air pressure chamber through the guide air pipe, so that the air pressure in the air pressure chamber increases and is greater than the water pressure inside the inner sleeve. At this time, the flexible blocking piece expands toward the inner side of the throttle orifice, and the opening diameter of the throttle orifice becomes smaller. On the contrary, when the air supply device extracts gas from the air pressure chamber, the opening diameter of the throttle orifice becomes larger, so as to achieve the purpose of adjusting the aperture of the throttle orifice, and the aperture of the throttle orifice can be adjusted according to the actual working condition 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.

[0031] The present invention is further configured as follows: a maintenance hole radially penetrating the outer sleeve and the inner sleeve is provided on the outer sleeve, the maintenance hole communicates with the inside of the inner sleeve, a blocking block is detachably and fixedly connected in the maintenance hole, a plurality of installation slots are provided on the end face of the blocking block away from the outer sleeve, a second through hole is provided in the blocking block, a first through hole penetrating the blocking block is communicated at one end of the second through hole facing the inside of the inner sleeve, the first through hole communicates with the inside of the inner sleeve, a third through hole is communicated at the end of the second through hole away from the first through hole, a pressing plate is slidably arranged along the axial direction of the blocking block in the third through hole, a sealing spring is arranged in the third through hole, both ends of the sealing spring are respectively fixed to the pressing plate and the inner wall of the third through hole, an auxiliary joint is fixed at one end of the pressing plate away from the second through hole, a plurality of water guide channels communicating the third through hole with the outside of the blocking block are provided on the auxiliary joint, a connecting rod is fixed on one 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 joints of the second through hole and the third through hole and the joints of the second through hole and the first through hole and the abutting parts are sealed.

[0032] By adopting the above technical solution, when it is necessary to sample and detect the concentrated water between two filter elements, after removing the maintenance cover, fix the external pipeline to the auxiliary joint. At this time, the water guiding channel is connected to the external pipeline. Then, hold the connection part of the external pipeline and the auxiliary joint and press it towards the outer sleeve. At this time, the pressing plate compresses the sealing spring. The pressing plate pushes the valve core towards 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 through the first through hole, the second through hole, the third through hole and the water guiding channel to the external pipeline in sequence, so as to achieve the purpose of sampling the concentrated water. When the pressing on the pressing plate is released, the sealing spring makes the pressing plate reset under the elastic action, and at the same time pulls the valve core to abut against the connection part of 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. Then, reinstall and fix the maintenance cover.

[0033] The present invention is further configured that: sealing grooves are provided on the opposite surfaces of the two connecting shells, and sealing rubber strips are inserted into the sealing grooves.

[0034] By adopting the above technical solution, by arranging sealing rubber strips on the opposite surfaces of the connecting shells, the sealing performance of the contact surface after the connecting shells are abutted is improved, and the situation of water leakage after the connecting shells are fixed is avoided.

[0035] The beneficial effects of the present invention are: when it is necessary to connect the filter elements in series, use the connecting component to connect two relatively arranged filter element installation cylinders. At this time, insert the filter elements into the filter element installation cylinders in series in sequence, and use the sealing structure to seal the mutually remote ends of the filter element installation cylinders. The water pump pumps the water in the water inlet pipe into the filter element installation cylinders through the pipeline structure. Pure water and concentrated water are generated through the filtration of the filter elements inside the filter element installation cylinders, and the pure water and the concentrated water are discharged through different pipeline structures, so as to achieve the purpose of water treatment. When it is necessary to connect the filter elements in parallel, only need to remove the connecting component, make the relatively arranged filter element installation cylinders independent of each other, insert the filter elements into the filter element installation cylinders respectively, and then use the sealing structure to seal the two ends of the filter element installation cylinders. At this time, only need to install a new pipeline structure at the relative ends of the two filter element installation cylinders to export the pure water and the concentrated water. During the whole switching process, only need to remove and adjust the connecting component, and there is no need to remove the whole membrane frame structure, which is beneficial to improving the operation convenience of switching the series-parallel form of the membrane frame structure, and further reducing the difficulty of the switching operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic structural diagram when the filter element installation cylinders in the present invention are connected in series using the connecting component;

[0037] Figure 2 It is a schematic structural diagram when the filter element installation cylinders in the present invention are not connected in series using the connecting component;

[0038] Figure 3This is a structural sectional view of the filter element installation cylinder and the connection component in the present invention;

[0039] Figure 4 It is Figure 3 an enlarged structural view of part A in

[0040] Figure 5 This is an exploded view of the structure of the connection component in the present invention;

[0041] Figure 6 This is a schematic structural view of the connection component in the present invention;

[0042] Figure 7 This is a schematic structural view of the blocking block in the present invention;

[0043] Figure 8 This is a structural sectional view of the throttle hole in the present invention.

[0044] In the figure: 10, chassis; 11, main support; 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 hoop; 19, intermediate pipe; 20, purified water pipe; 21, concentrated water pipe; 23, connection housing; 24, locking hoop; 25, maintenance cover; 26, sealing groove; 27, sealing rubber strip; 28, limiting block; 29, deformation groove; 30, outer sleeve; 31, positioning hole; 32, air guide hole; 33, maintenance hole; 34, inner sleeve; 35, pure water pipe; 36, throttle orifice plate; 37, connection flange; 38, joint pipe; 39, support rod; 40, through groove; 41, sliding groove; 42, limiting jack; 43, pipe installation hole; 44, air guide pipe; 45, positioning block; 46, sliding plug; 47, elastic block; 48, air pressure chamber; 49, flexible blocking piece; 50, throttle hole; 51, blocking block; 52, first through hole; 53, second through hole; 54, third through hole; 55, valve core; 56, connecting rod; 57, installation slot; 58, pressing plate; 59, auxiliary joint; 60, water guide channel; 61, sealing spring. Specific embodiments

[0045] In order to facilitate understanding of the technical means, creative features, achieved purposes and effects of the present invention, the following is further described in conjunction with Figures 1 to 8 as shown to further elaborate on the present invention.

[0046] As Figures 1 to 2As shown in the figure, a reverse osmosis membrane rack structure includes a support frame, a water pump 15, a filter element installation cylinder 16, a connection component, a pipeline structure, and a sealing structure. The support frame includes a bottom frame 10 and a main support 11. The main support 11 is vertically fixed on the bottom frame 10, and an interface module 12 is also fixedly arranged on the main support 11. The interface module 12 is connected to the pipeline structure. The filter element installation cylinders 16 are grouped in pairs and arranged oppositely. The filter element installation cylinders 16 are fixed to the support frame, and the adjacent groups of filter element installation cylinders 16 are vertically stacked. The connection component is arranged between the oppositely arranged filter element installation cylinders 16, and the connection component connects and seals the unclosed ends of the two filter element installation cylinders 16 that face each other. The pipeline structure is fixed on the support frame and communicates with the filter element installation cylinder 16. The pipeline structure is used to introduce water into the filter element installation cylinder 16 and export the water in the filter element installation cylinder 16. The sealing structure seals the unclosed end of the filter element installation cylinder 16, and the pipeline structure communicates with the filter element installation cylinder 16 through the sealing structure. The pipeline structure includes an intermediate pipe 19, a pure water pipe 20, and a concentrated water pipe 21. The sealing structure includes a sealing end cover 17 and an installation hoop 18. The sealing end cover 17 is inserted into the end of the filter element installation cylinder 16 to seal the opening of the filter element installation cylinder 16. The installation hoop 18 is fixed at the connection between the filter element installation cylinder 16 and the sealing end cover 17, and the installation hoop 18 presses and seals the connection between the filter element installation cylinder 16 and the sealing end cover 17. The intermediate pipe 19 communicates with the filter element installation cylinder 16 and connects the ends of two groups of vertically arranged filter element installation cylinders 16 in series. The end of the intermediate pipe 19 is detachably and fixedly connected to the sealing end cover 17. The intermediate pipe 19 is located on the eccentric side of the sealing end cover 17. One end of the concentrated water pipe 21 communicates with the end of the filter element installation cylinder 16 that is not connected in series. The connection end of the concentrated water pipe 21 and the filter element installation cylinder 16 is detachably and 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 pure water pipe 20 communicates with one end of the filter element installation cylinder 16 respectively. The pure water pipe 20 is detachably and fixedly connected to the sealing end cover 17. The pure 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 installation cylinder 16, the inside of the filter element installation cylinder 16 is divided into a concentrated water end and a pure water end, wherein the pure water end communicates with the pure water pipe 20, and the concentrated water end communicates with the intermediate pipe 19 or the concentrated water pipe 21. A secondary treatment tank 14 can be optionally installed at the end of the pure water pipe 20 away from the filter element installation cylinder 16. The secondary treatment tank 14 is fixed to the main support 11, and the secondary treatment tank 14 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. The input end of the water pump 15 is connected with a water inlet pipe 13, and the water inlet pipe 13 is connected to an 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.

[0047] As Figures 3 to 5As shown, the connecting component includes a connecting housing 23, a locking hoop 24, an outer sleeve 30 and an inner sleeve 34. Two connecting housings 23 are arranged oppositely, and the extending direction of the connecting housing 23 is the same as the axial direction of the filter element mounting cylinder 16. The opposite sides of the two connecting housings 23 are hollow structures. When the opposite sides of the two connecting housings 23 are abutted, the hollow structures of the two connecting housings 23 are combined into a complete cylindrical cavity. Sealing grooves 26 are formed on the opposite surfaces of the two connecting housings 23, and sealing rubber strips 27 are inserted into the sealing grooves 26. By arranging the sealing rubber strips 27 on the opposite surfaces of the connecting housing 23, the sealing performance of the contact surface after the connecting housing 23 is abutted is improved, and the situation of water leakage after the connecting housing 23 is fixed is avoided. The locking hoop 24 is arranged at both ends of the connecting housing 23. After the opposite sides of the two connecting housings 23 are abutted, the locking hoop 24 tightly holds and fixes them, and fixes the connecting housing 23 to the support frame. Deformation grooves 29 are formed on the opposite side surfaces of the connecting housing 23, and the installation positions of the deformation grooves 29 and the locking hoop 24 are radially aligned along the connecting housing 23. When the locking hoop 24 presses the connecting housing 23, the deformation grooves 29 are slightly deformed, making the connection between the two connecting housings 23 tighter. The outer sleeve 30 is fixedly arranged inside the connecting housing 23, and the inside of the outer sleeve 30 is hollow, so that the outer sleeve 30 forms a hollow sleeve-like structure. The inner sleeve 34 is coaxially rotatably arranged inside the outer sleeve 30. Sliding grooves 41 are formed in a circumferential direction on the outer curved surface of the inner sleeve 34. Protruding blocks extending into the sliding grooves 41 are arranged on the outer sleeve 30 to ensure that the inner sleeve 34 and the outer sleeve 30 do not have axial displacement. A pure water pipe 35 is coaxially arranged inside the inner sleeve 34. A throttle orifice plate 36 is fixedly arranged between the pure water pipe 35 and the inner wall of the inner sleeve 34. The throttle 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 throttle holes 50 are formed through the throttle orifice plate 36. A plurality of throttle orifice plates 36 are arranged in an equiangular array along the circumferential direction of the pure water pipe 35, and both ends of the throttle orifice plate 36 along the extending direction of the pure water pipe 35 are twisted and bent along the circumferential direction of the pure water pipe 35. By twisting and bending the throttle orifice plate 36 along the axial direction of the pure water pipe 35, when water flows through the throttle orifice plate 36, the water flow impact force received by the throttle orifice plate 36 is reduced, which is beneficial to improving the service life of the throttle orifice plate 36.

[0048] As Figure 3 and Figure 5As shown, at both ends connecting to the inner wall of the outer shell 23, there are limiting stoppers 28 fixedly arranged circumferentially around the outer shell 23. At both ends in the extending direction of the inner sleeve 34, there are connecting flanges 37. The connecting flanges 37 are in contact with the limiting stoppers 28. Inside the connecting flanges 37, there is a joint pipe 38 in coaxial contact with the pure water pipe 35. Between the joint pipe 38 and the connecting flange 37, there is a support rod 39 fixedly connected. The contact surface between the joint pipe 38 and the pure water pipe 35 is sealed. After the filter element is inserted into the filter element installation cylinder 16, the pipe end of the filter element outputting pure water is in sealed contact or inserted connection with the joint pipe 38, and the part of the filter element outputting concentrated water communicates with the space between the connecting flange 37 and the joint pipe 38.

[0049] As Figures 3 to 8 shown, a through groove 40 is radially penetrated on the connecting outer shell 23. After the two connecting outer shells 23 are fixedly opposed to each other, the through groove 40 forms a maintenance passage, and a maintenance cover 25 is detachably and fixedly arranged in the maintenance passage. The part of the outer sleeve 30 located in the maintenance passage is successively provided with a positioning hole 31 and a vent hole 32 along the axial direction of the outer sleeve 30. The positioning hole 31 and the vent hole 32 penetrate the outer sleeve 30 radially. On the inner sleeve 34, there is a pipe installation hole 43 that can be aligned with the vent hole 32 and a limiting jack 42 that can be aligned with the positioning hole 31. After the positioning hole 31 and the limiting jack 42 are aligned, a limiting passage is formed and a limiting member is arranged in the limiting passage. 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 opening 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 is fixed to the positioning block 45. The elastic block 47 undergoes compressive deformation when subjected to pressure. An air pressure chamber 48 communicating with the pipe installation hole 43 is opened in the inner sleeve 34. The air pressure chamber 48 extends into the throttle orifice plate 36 and communicates with the throttle hole 50. A flexible sealing piece 49 is fixedly arranged at the communication part between the air pressure chamber 48 and the throttle hole 50. A gas guide pipe 44 is detachably and fixedly arranged in the pipe installation hole 43. The end of the gas guide pipe 44 extends outside the maintenance cover 25 through the vent hole 32.

[0050] As Figure 4 and Figure 7As shown, a maintenance hole 33 that radially penetrates the outer sleeve 30 and the inner sleeve 34 is provided on the outer sleeve 30. The maintenance hole 33 communicates with the inside of the inner sleeve 34, and a blocking block 51 is detachably and fixedly connected in the maintenance hole 33. According to the actual working conditions, a conventional plug can be selected to close the maintenance hole 33, or the blocking block 51 can be used for closing. A plurality of installation slots 57 are formed on one end face of the blocking block 51 away from the outer sleeve 30. A second through hole 53 is formed in the blocking block 51. One end of the second through hole 53 facing the inside of the inner sleeve 34 is communicated with a first through hole 52 that penetrates the blocking block 51. The first through hole 52 communicates with the inside of the inner sleeve 34. The other end of the second through hole 53 away from the first through hole 52 is communicated with a third through hole 54. A pressing plate 58 is slidably arranged axially along the blocking block 51 in the third through hole 54. A sealing spring 61 is arranged in the third through hole 54. 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 one end of the pressing plate 58 away from the second through hole 53. A plurality of water guiding channels 60 that communicate the third through hole 54 with the outside of the blocking block 51 are formed on the auxiliary joint 59. A connecting rod 56 is fixed to one 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 a valve core 55 is fixed. The valve core 55 can respectively abut against the joints of the second through hole 53 and the third through hole 54 and the joints of the second through hole 53 and the first through hole 52, and the abutting parts are sealed.

[0051] When filter elements need to be connected in series, a connecting component is used to connect two relatively arranged filter element mounting cylinders 16. At this time, the filter elements are sequentially inserted into the filter element mounting cylinders 16 in series, and the mutually remote ends of the filter element mounting cylinders 16 are closed by a blocking structure. The water pump 15 pumps the water in the water inlet pipe 13 into the filter element mounting cylinders 16 through a pipeline structure. Pure water and concentrated water are generated through the filtration of the filter elements inside the filter element mounting cylinders 16. The pure water and the concentrated water are discharged through different pipeline structures, so as to achieve the purpose of water treatment. When the filter elements need to be connected in parallel, only the connecting component needs to be removed to make the relatively arranged filter element mounting cylinders 16 independent of each other, and filter elements are respectively inserted into the filter element mounting cylinders 16, and then the two ends of the filter element mounting cylinders 16 are blocked by a blocking structure. At this time, only a new pipeline structure needs to be installed at the opposite ends of the two filter element mounting cylinders 16 to lead out the pure water and the 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 whole switching process, only the connecting component needs to be removed and adjusted, and there is no need to remove the whole membrane frame structure, which is beneficial to improving the operation convenience of switching the series-parallel form of the membrane frame structure, and further reducing the difficulty of the switching operation.

[0052] 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.

[0053] 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.

[0054] One end of the air duct 44 located outside the maintenance passage can be connected to the air supply device. The air supply device introduces gas into the air pressure chamber 48 through the air duct 44, causing the air pressure in the air pressure chamber 48 to increase and be greater than the water pressure inside the inner sleeve 34. At this time, the flexible sealing piece 49 expands towards the inside of the throttle hole 50, reducing the opening aperture of the throttle hole 50. Conversely, when the air supply device extracts gas from the air pressure chamber 48, the opening aperture of the throttle hole 50 becomes larger, thereby achieving the purpose of adjusting the aperture of the throttle hole 50. The aperture of the throttle hole 50 can be adjusted according to the actual working conditions of the concentrated water flow rate inside the filter element installation cylinder 16, further improving the control ability of the water flow stability inside the filter element installation cylinder 16.

[0055] When it is necessary to conduct a sampling test on the concentrated water between two filter elements, after removing the maintenance cover 25, fix the external pipeline to the auxiliary joint 59. At this time, the water guide channel 60 is connected to the external pipeline. Then, hold the connection part of the external pipeline and the auxiliary joint 59 and press it towards the outer sleeve 30. At this time, the pressing plate 58 compresses the sealing spring 61. The pressing plate 58 pushes the valve core 55 towards the first through hole 52 through the connecting rod 56, making the first through hole 52, the second through hole 53, and the third through hole 54 communicate. At this time, the concentrated water inside the inner sleeve 34 flows through the first through hole 52, the second through hole 53, the third through hole 54, and the water guide channel 60 in sequence and flows into the external pipeline, thereby achieving the purpose of sampling the concentrated water. When the pressing on the pressing plate 58 is released, the sealing spring 61 makes the pressing plate 58 reset under the elastic action, and at the same time, pulls the valve core 55 through the connecting rod 56 to abut against the connection part of the third through hole 54 and the second through hole 53, sealing and separating the third through hole 54 and the second through hole 53. Then, reinstall and fix the maintenance cover 25. If during the process of pressing the pressing plate 58, the sliding path of the pressing plate 58 is interfered by foreign objects and cannot be reset, by further pressing the pressing plate 58, the valve core 55 abuts against the connection part of the first through hole 52 and the inner sleeve 34. At this time, the inner sleeve 34 can also be temporarily sealed and separated, avoiding the situation where the pressing plate 58 cannot be reset and the concentrated water in the inner sleeve 34 continuously drains.

[0056] If it is necessary to clean the connection component part alone, insert the external plug board into the installation slot 57, and then use tools such as pliers and wrenches to clamp the plug board and rotate it to screw the blocking block 51 out of the maintenance hole 33. Then, insert a conduit connected to the external water supply device into the maintenance hole 33, and inject cleaning liquid into the maintenance hole 33 to clean the connection component. After cleaning, screw the blocking block 51 back into the maintenance hole 33 and install and fix the maintenance cover 25.

[0057] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A reverse osmosis membrane rack structure, characterized in that: including a support frame, filter element installation cylinders (16), arranged in pairs opposite to each other, and the filter element installation cylinders (16) are fixed to the support frame; a connection assembly, arranged between the relatively arranged filter element installation cylinders (16), and the connection assembly connects and seals the relatively unclosed ends of the two filter element installation cylinders (16); a pipeline structure, fixed on the support frame and communicating with the filter element installation cylinder (16), and the pipeline structure is used to introduce water into the filter element installation cylinder (16) and discharge the water in the filter element installation cylinder (16); a blocking structure, closing the unclosed end of the filter element installation cylinder (16), and the pipeline structure communicates with the filter element installation cylinder (16) through the blocking structure; a water pump (15), divided into an output end and an input end, the output end of the water pump (15) is communicated with the pipeline structure, and a water inlet pipe (13) is communicated with the input end of the water pump (15); The connection assembly includes connection shells (23), two connection shells (23) are arranged opposite to each other, and the extending direction of the connection shells (23) is the same as the axial direction of the filter element installation cylinder (16); locking hoops (24), arranged at both ends of the connection shell (23), and the locking hoops (24) fix the two connection shells (23) and fix the connection shell (23) to the support frame; outer sleeves (30), fixedly arranged inside the connection shell (23); the inside of the outer sleeves (30) is a hollow structure; inner sleeves (34), coaxially and rotatably arranged inside the outer sleeves (30), and coaxially arranged inside the inner sleeves (34) is pure water pipes (35), arranged coaxially with the inner sleeves (34), and fixedly arranged between the inner walls of the pure water pipes (35) and the inner sleeves (34) is throttle orifice plates (36), blocking the space between the pure water pipes (35) and the inner walls of the inner sleeves (34), and a number of throttle holes (50) are penetrated through the throttle orifice plates (36); limiting blocks (28) are fixedly arranged circumferentially around the inner walls of the two ends of the connection shell (23) along the circumference of the connection shell (23), connection flanges (37) are arranged at both ends of the inner sleeve (34) in the extending direction, the connection flanges (37) are abutted against the limiting blocks (28), a joint pipe (38) coaxially abutted against the pure water pipe (35) is arranged inside the connection flange (37), a support rod (39) is fixedly connected between the joint pipe (38) and the connection flange (37), and the abutting surface between the joint pipe (38) and the pure water pipe (35) is sealed.

2. The reverse osmosis membrane rack structure according to claim 1, characterized in that: A number of throttle orifice plates (36) are arranged at equal angles along the circumference of the pure water pipe (35), and both ends of the throttle orifice plates (36) in the extending direction of the pure water pipe (35) are twisted and bent along the circumference of the pure water pipe (35).

3. The reverse osmosis membrane rack structure according to claim 1, characterized in that: A through groove (40) is radially penetrated through the connection shell (23), and after the two connection shells (23) are relatively fixed, the through groove (40) forms a maintenance passage, and a maintenance cover (25) is detachably and fixedly arranged in the maintenance passage.

4. The reverse osmosis membrane rack structure according to claim 3, characterized in that: The part of the outer sleeve (30) located in the maintenance passage is successively provided with a positioning hole (31) and an air guide hole (32) along the axial direction of the outer sleeve (30). The positioning hole (31) and the air guide hole (32) penetrate the outer sleeve (30) radially. A pipe installation hole (43) capable of aligning with the air guide hole (32) and a limit jacking hole (42) capable of aligning with the positioning hole (31) are provided on the inner sleeve (34). After the positioning hole (31) and the limit jacking hole (42) are aligned, a limit channel is formed, and a limiting member is arranged in the limit channel.

5. The reverse osmosis membrane rack structure according to claim 4, characterized in that: The limiting member includes a positioning block (45) inserted into the positioning hole (31); a sliding plug (46) slidably arranged at the end of the positioning block (45) facing the inner sleeve (34) along the opening direction of the positioning hole (31); an elastic block (47) arranged at the end of the sliding plug (46) inserted into the positioning block (45) and fixed to the positioning block (45).

6. The reverse osmosis membrane rack structure according to claim 4, wherein: An air pressure chamber (48) communicating with the pipe installation hole (43) is provided inside the inner sleeve (34). The air pressure chamber (48) extends into the throttling orifice plate (36) and communicates with the throttling hole (50). A flexible baffle (49) is fixedly arranged at the connection between the air pressure chamber (48) and the throttling hole (50). A gas guide pipe (44) is detachably and fixedly arranged in the pipe installation hole (43). The end of the gas guide pipe (44) penetrates through the maintenance cover (25) through the air guide hole (32) and extends to the outside of the maintenance passage.

7. A reverse osmosis membrane rack structure according to claim 4, characterized in that: An inspection hole (33) penetrating the outer sleeve (30) and the inner sleeve (34) radially is provided on the outer sleeve (30). The inspection hole (33) communicates with the inside of the inner sleeve (34). A blocking block (51) is detachably and fixedly connected in the inspection hole (33). A plurality of installation slots (57) are provided on the end face of the blocking block (51) far from the outer sleeve (30). A second through hole (53) is provided in the blocking block (51). A first through hole (52) penetrating the blocking block (51) is communicated at one end of the second through hole (53) facing the inside of the inner sleeve (34). The first through hole (52) communicates with the inside of the inner sleeve (34). A third through hole (54) is communicated at the end of the second through hole (53) far from the first through hole (52). A pressing plate (58) is slidably arranged in the third through hole (54) along the axial direction of the blocking block (51). A sealing spring (61) is arranged in the third through hole (54). 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) far from the second through hole (53). A plurality of water guide channels (60) communicating the third through hole (54) with the outside of the blocking block (51) are provided on the auxiliary joint (59). 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 a valve core (55) is fixed. The valve core (55) can abut against the connections between the second through hole (53) and the third through hole (54) and between the second through hole (53) and the first through hole (52) respectively, and the abutting parts are sealed.

8. The reverse osmosis membrane rack structure according to claim 1, characterized in that: Sealing grooves (26) are formed on the opposite surfaces of two connecting housings (23), and sealing rubber strips (27) are inserted into the sealing grooves (26).

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