CN220573151U - Rolling type membrane assembly, filter element and water purifying equipment - Google Patents

Abstract

The utility model relates to the technical field of water purification, in particular to a coiled membrane assembly, a filter element and water purification equipment, wherein a raw water flow channel communicated with a raw water inlet and a concentrated water outlet is formed at the inner side of a membrane bag, and a pure water flow channel communicated with a pure water outlet is formed at the outer side of the membrane bag; the concentrated water outlet is positioned at the first short side, and the raw water inlet is positioned at one side of the raw water flow passage close to the central pipe; the raw water flow channel is divided into a raw water flow channel drainage area close to the second short side and a raw water flow channel self-adapting area close to the first short side; the device also comprises a guide piece arranged in the raw water flow passage guide area and used for separating the membrane bags at the raw water inlet; the inner walls of the membrane bags of the raw water flow passage self-adapting area are mutually attached, and when raw water enters the raw water flow passage self-adapting area, the inner walls of the membrane bags attached to the raw water flow passage self-adapting area are flushed by the raw water to form a self-adapting flow passage. The utility model can solve the concentration polarization phenomenon of the concentrated water end of the coiled film element, and can ensure the coiling length of the coiled film in unit space without reducing the capability of the coiled film to treat raw water.

Description

Rolling type membrane assembly, filter element and water purifying equipment

Technical Field

The utility model relates to the technical field of water purification, in particular to a coiled membrane assembly, a filter element and water purification equipment.

Background

The water purifying equipment with the coiled film filter element is favored by the vast users because the coiled film has good filtering effect. After raw water enters a raw water channel formed by a reverse osmosis membrane, an ultrafiltration membrane, a microfiltration membrane and a nanofiltration membrane, certain or more substances in the raw water are removed by utilizing the separation characteristic of the separation membrane, so that the purposes of purification, concentration, purification and the like are achieved.

However, in the process of raw water passing through the raw water flow channel, the pressure of the membrane close to the raw water inlet end is high, the speed of the water flow line is high, the pressure of the membrane close to the concentrated water outlet end is reduced, and the speed of the water flow line is reduced, so that concentration polarization phenomenon is directly caused. The concentration polarization phenomenon of the dense water end of the membrane element is aggravated, the pollution of the membrane surface of the area can be accelerated, the desalination rate and the water yield are reduced, and the service life of the membrane element is shortened.

In the early development stage of the rolled membrane, the raw water diversion net needs to be fully distributed with the raw water flow channel due to the performance of the membrane material. Along with the improvement of the membrane material, the prior art still continues the method of filling the raw water flow channel with the raw water guide mesh cloth. However, as the raw water diversion net always has a certain thickness, at the water outlet end of the raw water flow channel, the minimum distance between the two inner walls of the inner side of the membrane bag is not smaller than the thickness of the raw water diversion net, and the concentration polarization phenomenon of the membrane surface of the concentrated water end of the raw water flow channel can not be effectively solved.

In the prior art, chinese patent publication No. CN101711948B discloses a rolled reverse osmosis membrane element with a variable thickness of a flow channel net, in which the flow channel net is formed by connecting a plurality of small water inlet flow guide nets with decreasing thickness, so that when the water inlet flow rate and the length of the water inlet flow channel are constant, the thickness of the water inlet flow channel net is reduced, the water inlet flow rate is increased, the water flow rate on the surface of the membrane is increased, and the concentration polarization phenomenon on the surface of a membrane at the dense water end of the membrane element is reduced.

Similar technical solutions can also be seen in the chinese patent document with publication number CN 202129030U. Both of these two solutions actually increase the water flow velocity at the end of the raw water flow channel by increasing the thickness of the raw water flow channel drainage area, thereby forming a thickness difference. But both of the two technical schemes can lead to the obvious increase of the thickness of the rolled membrane component, and in the filter element shell with the same inner diameter, the two technical schemes can lead to the rolled membrane to occupy a larger space after being rolled, and lead to the reduction of the rolled length of the rolled membrane, thereby reducing the treatment capacity of raw water.

Therefore, how to solve the concentration polarization phenomenon of the dense water end of the membrane element, and simultaneously ensure the rolling length of the coiled membrane in unit space without reducing the treatment capability of the coiled membrane to raw water is a problem to be solved urgently.

Disclosure of Invention

Aiming at the defects, the utility model aims to provide a coiled membrane assembly, a filter element and water purifying equipment.

The technical scheme provided by the utility model is as follows:

in a first aspect, the present application proposes a rolled membrane module comprising a pure water guide mesh, a central tube, and at least one membrane bag; the film bag is provided with two opposite long sides and a first short side and a second short side which are opposite;

the second short side is connected with the central tube, and the film bag is wound on the central tube along the extending direction of the long side;

a raw water flow passage communicated with the raw water inlet and the concentrated water outlet is formed on the inner side of the membrane bag, and a pure water flow passage communicated with the pure water outlet is formed on the outer side of the membrane bag; the pure water diversion net is arranged in the pure water flow channel;

the concentrated water outlet is positioned at the first short side, and the raw water inlet is positioned at one side of the raw water flow channel close to the central pipe;

the raw water flow channel is divided into a raw water flow channel drainage area close to the second short side and a raw water flow channel self-adaptive area close to the first short side;

the device also comprises a guide piece arranged in the raw water flow passage guide area and used for separating the membrane bags at the raw water inlet;

the inner walls of the membrane bags of the raw water flow passage self-adapting area are mutually attached, and when raw water enters the raw water flow passage self-adapting area, the inner walls of the membrane bags attached to the raw water flow passage self-adapting area are flushed by the raw water to form a self-adapting flow passage.

As an optional technical scheme of the first aspect, the raw water inlet is at least one through hole I arranged on the central tube; the first through hole is in through connection with the raw water flow channel, and after raw water flows into the raw water flow channel through the first through hole, concentrated water flows out from a concentrated water outlet arranged at the first short side along the extending direction of the long side.

Further, the flow guide piece is a flow guide net; in the axial direction of the central tube, the flow guiding net covers the first through hole; the diversion net is locally arranged in the raw water flow passage in the extending direction of the long side.

Optionally, the diversion net is an integrated diversion net; in the axial direction of the central tube, two side edges of the integrated diversion net respectively prop against two long edges of the membrane bag.

Optionally, the diversion net is a plurality of sheet diversion nets arranged at intervals, and the sheet diversion net is arranged corresponding to the first through hole.

Further, the folded corners of the two long sides connected with the central tube are provided with sheet-shaped diversion nets for enabling raw water to flow at the folded corners.

As an optional technical solution of the first aspect, the flow guiding member is a soft flow guiding strip, and the soft flow guiding strips are symmetrically arranged at two sides of a hole end of the through hole I, which is connected with the raw water flow channel.

Further, at least one soft guide strip is arranged at the folded angle of the two long sides connected with the central tube, and is used for enabling raw water to flow at the folded angle.

As an optional technical scheme of the first aspect, the raw water inlet is an opening of the membrane bag, wherein one long side of the membrane bag is close to the central tube; the opening is in through connection with the raw water flow channel, and after raw water flows into the raw water flow channel through the opening, concentrated water flows out from a concentrated water outlet arranged at the first short side along the extending direction of the long side.

Optionally, the flow guiding piece is an integrated flow guiding net; in the axial direction of the central tube, two side edges of the integrated diversion net are respectively propped against two long edges of the membrane bag; the diversion net is locally arranged in the raw water flow passage in the extending direction of the long side.

Optionally, the flow guiding piece is a plurality of split type flow guiding nets which are arranged at intervals along the axial direction of the central tube.

Optionally, the pure water outlet is at least one through hole II arranged on the central tube, and the through hole II is in through connection with the pure water flow channel; pure water flows into the central tube through the through hole and then flows out.

As an alternative to the first aspect, the flow guide has at least 3/4 circumference around the central tube in the circumferential direction.

In a second aspect, the present application further proposes a rolled membrane filter element, including a first end cap and a second end cap respectively mounted on two sides of the rolled membrane module in the first aspect or any one of the optional technical solutions of the first aspect; also included is a housing for housing the rolled membrane module; a gap for allowing concentrated water to circulate is reserved between the shell and the coiled membrane component;

at least one first sealing ring is arranged between the shell and the first and second end covers, and the first sealing ring is used for preventing concentrated water in the gap from overflowing from the joint of the shell and the first and second end covers;

the first end cover is in sealing connection with the end part of the rolled membrane component;

the second end cover is provided with a concentrated water channel which is communicated with the gap in a sealing way;

when the raw water inlet is an opening of the membrane bag, one long side of the membrane bag is close to the central tube, and the second end cover is provided with a channel communicated with the opening in a sealing way;

and at least one second sealing ring is arranged between the second end cover and the central tube and is used for preventing water flow in the channel from overflowing from the joint of the second end cover and the central tube.

The first end cover and the second end cover are respectively detachably connected with a first cover body and a second cover body; and the second cover body is provided with three connectors which are respectively communicated with the concentrated water channel, the channel and the central tube in a sealing way.

In a third aspect, the present application further provides a water purifying apparatus, including a main frame provided with at least one installation cavity; a water storage tank is arranged in the main frame body and is connected with a joint communicated with the pure water outlet through a pipeline, and the water storage tank is used for storing pure water; a delivery pump is also arranged in the main frame body and is used for pumping the pure water in the water storage tank out of the main frame body;

the mounting cavity is used for inserting the coiled membrane filter element in the second aspect; the installation cavity is internally provided with a locking mechanism, and the locking mechanism is used for locking the coiled membrane filter element in the installation cavity when the coiled membrane filter element is inserted in the installation cavity;

the device also comprises an unlocking mechanism, wherein the unlocking mechanism is used for unlocking the locking mechanism to the coiled membrane filter element.

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

according to the utility model, the raw water diversion net fully distributed with the raw water runner in the prior art is replaced by the diversion piece only arranged in the raw water runner diversion area, and the diversion piece is used for separating the membrane of the raw water runner diversion area, so that the inner wall of the membrane is prevented from being attached, and the raw water is ensured to enter the raw water runner. When raw water is not introduced, the membrane bags in the self-adaptive area of the raw water runner can be attached, and when the raw water is introduced, under the combined action of the pressure difference between the raw water inlet and the concentrated water outlet and the water pressure at one side of the pure water runner, the membranes at two sides of the membrane bags are flushed away from the partial area by the raw water from the attached state, so that a self-adaptive runner is formed, water flows in the self-adaptive runner, the thickness of the self-adaptive runner can be smaller than that of the conventional flow guiding net, and therefore, the water flow speed of the self-adaptive area of the raw water runner is automatically increased, and the concentration polarization problem on the surfaces of the membranes is solved.

In addition, the application cancels the use of the raw water diversion net in the self-adapting area of the raw water runner, thereby saving the space occupied by part of the raw water diversion net, and winding longer membrane bags when the inner space of the shell is fixed, thereby improving the length of the raw water runner and the processing capacity of the coiled membrane assembly to raw water.

Drawings

FIG. 1 is a schematic view of a raw water inlet in a central tube and a deflector as an integrated deflector mesh;

FIG. 2 is a schematic cross-sectional view of a center tube with a first through hole and a second through hole according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of the raw water inlet in the central tube and the guide piece being a sheet-like guide net;

FIG. 4 is a schematic view of the raw water inlet in the central tube and the guide member being a soft guide strip;

FIG. 5 is a schematic view of the integrated guide net with the raw water inlet on the long side;

FIG. 6 is a schematic view showing the pure water outlet in the center tube;

FIG. 7 is a schematic view of the raw water inlet on the long side and the diversion member being a split diversion net;

FIG. 8 is a schematic view of a filter element structure when a channel is provided in the second end cap in one embodiment of the present application;

FIG. 9 is a schematic diagram of a filter element according to an embodiment of the present disclosure, wherein two end caps are not provided with channels.

Reference numerals in the schematic drawings illustrate:

a central tube 101, a first through hole 102, an opening 103 and a second through hole 104;

a film pouch 201, a long side 202, a first short side 203, a second short side 204;

an integrated guide net 301, a sheet guide net 302, a soft guide strip 303 and a split guide net 304;

a shell 401, a second cover 402, a first cover 403, a first end cover 404, a second end cover 405, a channel 406 and a concentrated water channel 407;

seal ring one 501, seal ring two 502.

Detailed Description

For a further understanding of the present utility model, the present utility model will be described in detail with reference to the drawings and examples.

The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are not intended to limit the scope of the utility model, since any modification, variation in proportions, or adjustment of the size, etc. of the structures, proportions, etc. should be considered as falling within the spirit and scope of the utility model, without affecting the effect or achievement of the objective. Also, the terms "upper", "lower", "left", "right", "middle", and the like are used herein for descriptive purposes only and are not intended to limit the scope of the utility model for modification or adjustment of the relative relationships thereof, as they are also considered within the scope of the utility model without substantial modification to the technical context.

A roll-type membrane module in this embodiment includes a pure water guide net, a center tube 101, and at least one membrane bag 201. The membrane pouch 201 is made of two sheets of membrane material by conventional joining techniques such as adhesive or film welding. After the film pouch 201 is formed, a structure is formed having two opposing long sides 202 and opposing first and second short sides 203, 204.

When the film bag 201 needs to be wound on the central tube 101, the second short side 204 is connected to the central tube 101, and the second short side 204 may be fixed to the central tube 101 by using the prior art, and then wound along the extending direction of the long side 202. After winding, a raw water channel communicated with a raw water inlet and a concentrated water outlet is formed on the inner side of the membrane bag 201, a pure water channel communicated with a pure water outlet is formed on the outer side of the membrane bag, and a pure water guide net is arranged in the pure water channel.

After raw water enters the raw water flow channel from the raw water inlet, pure water passes through the membrane to enter the pure water flow channel, and then the pure water flows out from the pure water outlet under the diversion effect of the pure water diversion net. And the concentrated water remaining in the raw water flow path flows out of the raw water flow path from the concentrated water outlet.

Note that in the present embodiment, the concentrate outlet is located at the first short side 203, and the raw water inlet is located at the side of the raw water flow passage close to the center pipe 101. That is, after the raw water enters the raw water flow channel, the raw water flows in the raw water flow channel along the extending direction of the long side 202, and finally the concentrated water flows out from the concentrated water outlet positioned at the first short side 203.

The raw water flow channel is divided into a raw water flow channel drainage area near the second short side 204 and a raw water flow channel self-adaptation area near the first short side 203. The guide member is disposed in the raw water channel guide region and is used for separating the membrane bags 201 at the raw water inlet, so that the inner walls of the membrane bags 201 in the raw water channel guide region are not attached to each other, and raw water can enter the raw water channel. The membrane bag 201 is wound without being stretched, so that the inner walls of the membrane bag 201 in the raw water flow passage adaptive region can be mutually attached. When raw water enters the self-adaptive area of the raw water flow channel, the inner wall of the membrane bag 201, which is partially attached, is flushed by the raw water, namely, under the combined action of the pressure difference between the raw water inlet and the concentrated water outlet and the water pressure at one side of the pure water flow channel, after the membranes at two sides of the membrane bag 201 are flushed by the raw water from the attached state, a self-adaptive flow channel is formed, water flows form a water film flowing in the self-adaptive flow channel, and the thickness of the self-adaptive flow channel can be smaller than that of the conventional flow guiding net, so that the water flow speed of the self-adaptive area of the raw water flow channel is automatically increased, and the concentration polarization problem on the surfaces of the membranes is solved.

In this embodiment, the diversion member may occupy the raw water flow passage diversion area completely, or may occupy a part of the raw water flow passage diversion area. The length of the baffle is less than the length of the long side 202, but it is also ensured that the baffle has at least 3/4 of a circumference in the circumferential direction around the central tube 101. Since the raw water flow passage adaptive region is not provided with a guide member, the concentrated water outlet must be located at the first short side 203, so that the membrane bag 201 cannot be stretched to form an adaptive flow passage when the concentrated water outlet is located at the inner layer is avoided.

As an alternative embodiment, as shown in fig. 1, 3 and 4, the raw water inlet is at least one through hole 102 formed in the central tube 101. Preferably, the first through holes 102 are plural and are arranged at intervals. After the raw water is introduced into the center tube 101, the raw water can flow out from the inside of the plurality of first through holes 102. The first through hole 102 is connected with the raw water flow channel in a penetrating way, and after raw water flows into the raw water flow channel through the first through hole 102, concentrated water flows out from a concentrated water outlet arranged at the first short side 203 along the extending direction of the long side 202.

As an alternative embodiment, the flow guide element is a flow guide mesh, which meets the following requirements: in the axial direction of the central tube 101, the flow guiding net covers the first through hole 102; in the extending direction of the long side 202, the diversion net is locally arranged in the raw water flow channel, i.e. the diversion net is not arranged at the water outlet end of the raw water flow channel. The diversion net only needs to separate the membrane bags of the raw water runner diversion area, so that raw water can enter the raw water runner.

When the raw water inlet is the first through hole 102 provided on the central tube 101, as shown in fig. 1, the diversion net may be an integrated diversion net 301. At this time, in the axial direction of the central tube 101, two sides of the integrated diversion net 301 respectively prop against two long sides 202 of the membrane bag 201, so that poor raw water fluidity at the folded corner where the two long sides 202 are connected with the central tube 101 can be avoided.

When the raw water inlet is the first through hole 102 formed in the central tube 101, as shown in fig. 3, the diversion net is a plurality of sheet diversion nets 302 arranged at intervals, and the sheet diversion nets 302 are arranged corresponding to the first through hole 102, so that the membrane bags 201 at the opening of the first through hole 102 are separated, and raw water can smoothly flow into the raw water flow channel. In order to improve the fluidity of the raw water at the corners, a sheet-shaped guide net 302 is provided at each corner where the two long sides 202 meet the central tube 101, for allowing the raw water to flow at the corners.

When the raw water inlet is the first through hole 102 formed in the central tube 101, as shown in fig. 4, the guide piece is a soft guide strip 303, the soft guide strip 303 can be woven by composite fibers, other materials in the prior art can be adopted, and only the condition that the soft guide strip 303 can be wound and the inner wall of the membrane cannot be damaged is satisfied. The soft guide strips 303 are symmetrically arranged at two sides of the hole end of the first through hole 102 connected with the raw water flow channel, so that the membrane bags 201 at the hole end of the first through hole 102 are separated, and raw water can smoothly flow into the raw water flow channel. In order to improve the fluidity of the raw water at the folded corners, at least one soft guide strip 303 is arranged at the folded corners where the two long sides 202 are connected with the central tube 101, and two or more soft guide strips can be arranged, so that the raw water flows at the folded corners.

As an alternative embodiment, as shown in fig. 5 and 7, the raw water inlet is an opening 103 formed by one long side 202 of the membrane bag 201 near the central tube 101, that is, the two long sides 202 are sealed and connected except the opening 103 by a sealing connection technology in the prior art, and the central tube 101 is not provided with a through hole communicated with the raw water flow channel.

The opening 103 is connected to the raw water flow path in a penetrating manner, and after raw water flows into the raw water flow path through the opening 103, concentrated water flows out from a concentrated water outlet provided at the first short side 203 along the extending direction of the long side 202.

When the raw water inlet is the opening 103 of the membrane bag 201, where one long side 202 is close to the central tube 101, as shown in fig. 5, the diversion member is an integrated diversion net 301. In the axial direction of the central tube 101, two side edges of the integrated diversion net 301 respectively prop against two long edges 202 of the membrane bag 201; the diversion net is partially arranged in the raw water flow passage along the extending direction of the long side 202. The two sides of the integrated diversion net 301 are respectively propped against the two long sides 202 of the membrane bag 201, so that poor raw water fluidity at the folding angle of the connection of the two long sides 202 and the central tube 101 can be avoided. The integral diversion net 301 can avoid the inner wall of the membrane bag 201 at the opening 103 from being attached, thereby facilitating the raw water to flow into the raw water flow passage from the opening 103.

When the raw water inlet is the opening 103 of the membrane bag 201, where one long side 202 is close to the central tube 101, as shown in fig. 7, the flow guiding members are a plurality of split-type flow guiding nets 304 arranged at intervals along the axial direction of the central tube 101. The split type diversion net 304 can avoid the inner wall of the membrane bag 201 at the opening 103 from being attached, thereby facilitating the raw water to flow into the raw water flow passage from the opening 103. Preferably, the spacing between two adjacent split-type guide screens 304 is required to ensure that the membrane bags 201 between two adjacent split-type guide screens 304 are not adhered due to the blocking of the split-type guide screens 304.

As shown in fig. 6, the pure water outlet is at least one second through hole 104 formed in the central tube 101, and preferably, the second through holes 104 are plural and are arranged at intervals. The second through hole 104 is connected with the pure water flow channel, and pure water flows into the central tube 101 through the second through hole 104 and then flows out. At this time, the edge where the pure water flow channel is connected with the central tube 101 is not sealed, and the other three edges of the outer side of the membrane bag 201 are correspondingly and hermetically connected with the other three edges of the outer side of the adjacent membrane bag 201 by adopting the existing sealing connection technology, for example, the pure water flow channel and the central tube are adhered by a sealing adhesive tape.

When the central tube 101 is provided with the first through hole 102 and the second through hole 104, as shown in fig. 2, the central tube 101 is provided with two independent water flow passages, and the two water flow passages are respectively communicated with the first through hole 102 and the second through hole 104.

According to the utility model, the raw water diversion net fully distributed with the raw water runner in the prior art is replaced by the diversion piece only arranged in the raw water runner diversion area, and the diversion piece is used for separating the membrane of the raw water runner diversion area, so that the inner wall of the membrane is prevented from being attached, and the raw water is ensured to enter the raw water runner. When raw water is not introduced, the membrane bags 201 in the self-adaptive area of the raw water flow channel can be attached, and when the raw water is introduced, under the combined action of the pressure difference between the raw water inlet and the concentrated water outlet and the water pressure at one side of the pure water flow channel, the membranes at two sides of the membrane bags 201 are flushed away from the partial area by the raw water from the attached state, so that a self-adaptive flow channel can be formed, and the thickness of the flow channel can be smaller than that of the conventional flow guide net, so that the water flow speed of the self-adaptive area of the raw water flow channel can be automatically increased, and the concentration polarization problem on the surface of the membrane can be solved.

The application also provides a rolled membrane filter element, as shown in fig. 8-9, comprising a first end cover 404 and a second end cover 405 which are respectively arranged at two sides of the rolled membrane component; and the device also comprises a shell 401 for accommodating the rolled membrane module, and a gap for allowing concentrated water to circulate is reserved between the shell 401 and the rolled membrane module.

At least one first sealing ring 501, and optionally two sealing rings are arranged between the shell 401 and the first end cover 404 and between the shell and the second end cover 405. Seal ring one 501 is used to avoid the dense water in the gap from overflowing from the connection between the housing 401 and the first and second end caps 404 and 405.

End cap one 404 is sealingly connected to the end of the rolled film assembly, such as by a waterproof glue layer to sealingly connect the end of bag 201 to end cap one 404.

The second end cover 405 is provided with a concentrated water channel 407, and the concentrated water channel 407 is in sealed communication with the gap, so that the concentrated water in the gap can flow into the flowing water channel 407.

When the raw water inlet is the opening 103 of the membrane bag 201, one long side 202 of the raw water inlet is close to the central tube 101, the second end cover 405 is provided with a channel 406 which is communicated with the opening 103 in a sealing way. The channel 406 is in sealed communication with the opening 103 provided in the long side 202.

As shown in fig. 9, the central tube 101 is used for introducing raw water and discharging pure water. As shown in fig. 8, when the center pipe 101 is used only for discharging pure water, the passage 406 is in sealed communication with the opening 103, thereby being used for introducing raw water.

At least one second seal ring 502, preferably two, is mounted between the second end cap 405 and the center tube 101. The second seal ring 502 is used to prevent water in the channel 406 from overflowing from the connection between the second end cap 405 and the center tube 101.

The first end cover 404 and the second end cover 405 are detachably connected with the first cover 403 and the second cover 402 respectively, for example, external threads can be arranged on the end covers, and internal threads can be arranged on the cover bodies, so that the cover bodies are in threaded connection with the end covers. The second cover 402 is provided with three connectors which are respectively communicated with the concentrated water channel 407, the channel 406 and the central tube 101 in a sealing way, so that the second cover can be connected with an external pipeline through the connectors.

Because the application cancels the use of the raw water diversion net in the raw water flow passage self-adapting area, thereby saving the occupied space of part of the raw water diversion net, and winding longer membrane bags when the inner space of the shell is fixed, thereby improving the length of the raw water flow passage and the processing capacity of the coiled membrane component to raw water.

The application also provides a water purification device, which comprises a main frame body provided with at least one installation cavity. A water storage tank is arranged in the main frame body and is connected with a joint communicated with the pure water outlet through a pipeline, and the water storage tank is used for storing pure water. And a delivery pump is also arranged in the main frame body and is used for pumping the pure water in the water storage tank out of the main frame body.

The installation cavity is used for inserting the coiled membrane filter element. And a locking mechanism is further arranged in the mounting cavity, and is used for locking the coiled membrane filter element in the mounting cavity when the coiled membrane filter element is inserted in the mounting cavity. The device also comprises an unlocking mechanism, wherein the unlocking mechanism is used for unlocking the locking mechanism to the coiled membrane filter element. Both the locking mechanism and the unlocking mechanism may employ mechanisms known in the art.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.

Claims (16)

1. A rolled membrane module comprising a pure water diversion net, a central tube (101) and at least one membrane bag (201); the film bag (201) is provided with two opposite long sides (202), a first opposite short side (203) and a second opposite short side (204);

the second short side (204) is jointed with the central tube (101), and the film bag (201) is wound on the central tube (101) along the extending direction of the long side (202);

a raw water flow passage communicated with a raw water inlet and a concentrated water outlet is formed on the inner side of the membrane bag (201), and a pure water flow passage communicated with a pure water outlet is formed on the outer side of the membrane bag; the pure water diversion net is arranged in the pure water flow channel;

the method is characterized in that:

the concentrated water outlet is positioned at the first short side (203), and the raw water inlet is positioned at one side of the raw water runner close to the central tube (101);

the raw water flow channel is divided into a raw water flow channel drainage area close to the second short side (204) and a raw water flow channel self-adaptive area close to the first short side (203);

the device also comprises a guide piece arranged in the raw water flow passage guide area and used for separating a membrane bag (201) at the raw water inlet;

the inner walls of the membrane bags (201) of the raw water flow passage self-adapting area are mutually attached, and when raw water enters the raw water flow passage self-adapting area, the inner walls of the membrane bags (201) partially attached are flushed by the raw water to form a self-adapting flow passage.

2. The roll film assembly of claim 1, wherein: the raw water inlet is at least one through hole I (102) arranged on the central pipe (101); the first through hole (102) is in through connection with the raw water flow channel, and after raw water flows into the raw water flow channel through the first through hole (102), concentrated water flows out from a concentrated water outlet arranged at the first short side (203) along the extending direction of the long side (202).

3. The roll film assembly of claim 2, wherein: the flow guide piece is a flow guide net; in the axial direction of the central tube (101), the first through hole (102) is covered by the diversion net; the diversion net is partially arranged in the raw water flow passage along the extending direction of the long side (202).

4. A roll film assembly according to claim 3, wherein: the diversion net is an integrated diversion net (301); in the axial direction of the central tube (101), two side edges of the integrated diversion net (301) respectively prop against two long edges (202) of the membrane bag (201).

5. A roll film assembly according to claim 3, wherein: the guide net is a plurality of sheet guide nets (302) which are arranged at intervals, and the sheet guide nets (302) are arranged corresponding to the first through holes (102).

6. The roll film assembly of claim 5, wherein: the folded corners of the two long sides (202) connected with the central tube (101) are respectively provided with a sheet-shaped guide net (302) for enabling raw water to flow at the folded corners.

7. The roll film assembly of claim 2, wherein: the flow guide piece is a soft flow guide strip (303), and the soft flow guide strip (303) is symmetrically arranged at two sides of a hole end of the first through hole (102) connected with the raw water flow channel.

8. The roll film assembly of claim 7, wherein: at least one soft guide strip (303) is arranged at the folding angle of the two long sides (202) connected with the central tube (101) for enabling raw water to flow at the folding angle.

9. The roll film assembly of claim 1, wherein: the raw water inlet is an opening (103) formed in the way that one long side (202) of the membrane bag (201) is close to the central tube (101); the opening (103) is in through connection with the raw water flow channel, and after raw water flows into the raw water flow channel through the opening (103), concentrated water flows out from a concentrated water outlet arranged at the first short side (203) along the extending direction of the long side (202).

10. The roll film assembly of claim 9, wherein: the guide piece is an integrated guide net (301); in the axial direction of the central tube (101), two side edges of the integrated diversion net (301) respectively prop against two long edges (202) of the membrane bag (201); the diversion net is partially arranged in the raw water flow passage along the extending direction of the long side (202).

11. The roll film assembly of claim 9, wherein: the flow guide piece is a plurality of split type flow guide nets (304) which are distributed at intervals along the axial direction of the central tube (101).

12. The roll film assembly of claim 1, wherein: the pure water outlet is at least one through hole II (104) arranged on the central tube (101), and the through hole II (104) is in through connection with the pure water flow channel; pure water flows into the central tube (101) through the second through hole (104) and then flows out.

13. A roll film assembly according to any one of claims 1-12, wherein: the deflector has a circumference of at least 3/4 around the central tube (101).

14. A roll-up membrane cartridge, characterized in that: comprising a first end cap (404) and a second end cap (405) respectively mounted on both sides of the rolled membrane module according to claim 13; also included is a housing (401) for housing the rolled film assembly; a gap for circulating concentrated water is reserved between the shell (401) and the coiled membrane component;

at least one first sealing ring (501) is arranged between the shell (401) and the first end cover (404) and between the shell and the second end cover (405), and the first sealing ring (501) is used for preventing concentrated water in a gap from overflowing from the joint of the shell (401) and the first end cover (404) and the second end cover (405);

the first end cover (404) is in sealing connection with the end part of the rolled membrane module;

the second end cover (405) is provided with a concentrated water channel (407), and the concentrated water channel (407) is communicated with the gap in a sealing way;

when the raw water inlet is an opening (103) formed in the membrane bag (201) and one long side (202) of the membrane bag is close to the central tube (101), a second end cover (405) is provided with a channel (406) communicated with the opening (103) in a sealing way;

and at least one second sealing ring (502) is arranged between the second end cover (405) and the central tube (101), and the second sealing ring (502) is used for preventing water flow in the channel (406) from overflowing from the joint of the second end cover (405) and the central tube (101).

15. A roll-to-roll membrane cartridge as claimed in claim 14, wherein: the first end cover (404) and the second end cover (405) are respectively and detachably connected with the first cover body (403) and the second cover body (402); the second cover body (402) is provided with three joints which are respectively communicated with the concentrated water channel (407), the channel (406) and the central tube (101) in a sealing way.

16. A water purifying device comprises a main frame body provided with at least one installation cavity; a water storage tank is arranged in the main frame body and is connected with a joint communicated with the pure water outlet through a pipeline, and the water storage tank is used for storing pure water; a delivery pump is also arranged in the main frame body and is used for pumping the pure water in the water storage tank out of the main frame body;

wherein the mounting cavity is for inserting a rolled membrane cartridge according to claim 14 or 15; the installation cavity is internally provided with a locking mechanism, and the locking mechanism is used for locking the coiled membrane filter element in the installation cavity when the coiled membrane filter element is inserted in the installation cavity;

the device also comprises an unlocking mechanism, wherein the unlocking mechanism is used for unlocking the locking mechanism to the coiled membrane filter element.