Casting end cap, casting device and casting method of ultrafiltration membrane

Abstract

The present invention relates to a casting end cap, a casting device and a casting method for an ultrafiltration membrane, wherein the casting end cap comprises an end cap portion provided with a central through hole and a central plug, wherein the central plug penetrates the central through hole and is sealed and detachably connected with the end cap portion, wherein a membrane thread port plugging glue cavity and a packaging glue cavity are provided in the end cap portion, and a membrane thread port plugging glue inlet and a packaging glue inlet are correspondingly provided on its outer wall, and a membrane thread port plugging glue outlet and a packaging glue outlet are correspondingly provided on its inner wall; the casting device comprises a membrane shell with openings at both ends and two of the above-mentioned casting end cap assemblies, wherein the end walls at both ends of the membrane shell are detachably and sealably connected with the side walls of the two casting end caps; the casting method comprises the steps of placing the above-mentioned casting device into a centrifuge and injecting glue and curing. The present invention solves the problems of hard glue plugging holes and long standing time after membrane thread plugging holes that are prone to occur in the existing production process, and improves the product quality and production efficiency of the assembly.

Description

Technical Field

[0001] The invention relates to the field of membrane separation technology and equipment, and in particular to a casting end cover, a casting device and a casting method for an ultrafiltration membrane. Background Art

[0002] Sewage treatment is an important part of environmental protection. Pressure membrane plays an important role in sewage treatment and is widely used in many industries such as printing, papermaking, chemical industry, and forward osmosis base membrane production. To obtain high-quality water production, the quality of the osmotic membrane is of paramount importance.

[0003] The general casting process of the current pressure membrane module production is as follows: first, use the membrane wire plugging glue to manually plug the membrane wire holes, let it stand for a period of time and then break it up, then install it into the casting end cover and cast it with epoxy glue.

[0004] However, due to the manual application of the membrane wire plugging glue, it is inevitable that the membrane wire plugging holes will not be tight. Once the wire holes are not completely blocked, the problem of hard glue entering the wire holes will occur during the casting process. After the component is cut, some membrane wire hard glue plugging holes will appear on the end face. This part of the membrane wire plugged by the hard glue becomes waste wire, which affects the performance of the component. In addition, the membrane wire after manual application cannot be dispersed immediately and needs to be left to stand for a long time. This leads to a backlog of many products in this process during mass production. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems. The present invention provides a casting end cover, a casting device and a casting method.

[0006] According to a first aspect of the present invention, there is provided a casting end cap for an ultrafiltration membrane, comprising an end cap portion provided with a central through hole and a central plug, the central plug passing through the central through hole and being sealed and detachably connected to the end cap portion, a membrane thread port sealing glue cavity and a packaging glue cavity being provided in the end cap portion, and a membrane thread port sealing glue inlet and a packaging glue inlet being correspondingly provided on its outer wall, and a membrane thread port sealing glue outlet and a packaging glue outlet being correspondingly provided on its inner wall.

[0007] Among them, the end cover part includes an end cover and a pressure plate both of which are provided with a through hole in the center. The end cover and the pressure plate can be detachably crimped. One surface of the pressure plate is provided with three layers of annular walls from the center to the periphery. The top surfaces of the three layers of annular walls are sealed with the outer cover surface of the end cover to form a surrounding membrane thread port sealing glue cavity and a packaging glue cavity.

[0008] Among them, there are multiple membrane thread sealing glue outlets, which are arranged in a ring shape on the cover of the end cover and located between the two innermost ring walls; there are multiple packaging glue outlets, which are arranged in a ring shape on the cover and located between the two outermost ring walls.

[0009] The packaging glue outlet includes a plurality of inner glue inlets and a plurality of outer glue inlets, the plurality of outer glue inlets are arranged around the plurality of inner glue inlets, and an annular partition wall is arranged between the plurality of outer glue inlets and the plurality of inner glue inlets.

[0010] Among them, the casting end cover also includes multiple inner glue inlet pipes, which are respectively located on both sides of the end cover with the pressure plate. The multiple inner glue inlet pipes are fixed to the multiple inner glue inlet ports in a one-to-one correspondence, and the multiple inner glue inlet pipes and the multiple inner glue inlet ports are sealed by crimping.

[0011] The casting end cover further comprises a first injection joint and a second injection joint, the first injection joint is sealingly connected to the inlet of the membrane thread port plugging glue, and the second injection joint is sealingly connected to the inlet of the packaging glue.

[0012] Among them, a locking bolt is provided at one end of the center plug, and a step structure is provided on the middle periphery of the center plug. The center plug clamps the end cover part from both sides through the step structure and the locking bolt to achieve fixation with the end cover part.

[0013] According to a second aspect of the present invention, there is provided a casting device for an ultrafiltration membrane, comprising a membrane shell with openings at both ends, two pairs of semi-annular hoops and the two casting end covers mentioned above, the two casting end covers being respectively located at the two ends of the mold shell, and each casting end cover is individually sealed with the cross-section of the membrane shell through a pair of semi-annular hoops.

[0014] According to a third aspect of the present invention, there is provided a casting method for an ultrafiltration membrane assembly using the above-mentioned casting device, comprising the following steps: installing an end distributor and a membrane filament in the casting device; placing the installed casting device in a centrifuge for fixing; weighing the membrane filament port plugging glue, and injecting it into the membrane filament port plugging glue cavities of the two casting end covers respectively; starting the centrifuge to concentrate the membrane filament port plugging glue at both ends at the bottom of the casting end covers at both ends until it respectively enters the ports at both ends of the membrane filament and solidifies; after the membrane filament port plugging glue is solidified, weighing the packaging glue, and injecting it into the packaging glue cavities of the casting end covers at both ends respectively, and starting the centrifuge again to concentrate the packaging glue at both ends at the ports of the membrane shell in the casting end covers at both ends and solidify; removing the casting device from the centrifuge, and then the casting is completed.

[0015] Among them, in the step of injecting the membrane thread port plugging glue, the depth of the membrane thread port plugging glue entering the membrane thread port and solidifying is 0.5-1cm; in the step of injecting the packaging glue, the depth of the packaging glue entering the membrane shell port and solidifying is 4-5cm.

[0016] The casting method of the present invention solves the problems of hard glue plugging and long standing time after membrane wire plugging that are easy to occur in the existing production process, eliminates the existence of component casting defects, and improves the product quality and production efficiency of the components. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0018] Figure 1 A schematic diagram of a casting end cap according to an embodiment of the present invention is shown;

[0019] Figure 2 A schematic diagram of an end cap according to an embodiment of the present invention is shown;

[0020] Figure 3 shows a schematic diagram of a pressing plate according to an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the connection between a casting device, a membrane wire distributor and a membrane wire according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0022] The exemplary embodiments of the present disclosure will be described in more detail below. Although the exemplary embodiments of the present disclosure are shown in the specification, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0023] like Figure 1 As shown, a casting end cap of an ultrafiltration membrane comprises an end cap portion 10 provided with a central through hole and a central plug 20, wherein the central plug 20 passes through the central through hole and is sealed and detachably connected to the end cap portion 10, wherein a membrane thread sealing glue cavity and a packaging glue cavity are provided in the end cap portion 10, and a membrane thread sealing glue inlet and a packaging glue inlet are correspondingly provided on its outer wall, and a membrane thread sealing glue outlet and a packaging glue outlet are correspondingly provided on its inner wall.

[0024] The center plug 20 is inserted into the center of the cover plate of the end cover part 10, and is fixedly connected to the casting end cover 10 through the locking nut and the step-shaped structure at the tail, and seals the center through hole of the casting end cover 10 to prevent the glue from entering the center through hole, wherein a plug sealing groove is provided on the fitting surface of the step-shaped structure with the bottom of the casting end cover 10, and a sealing ring is provided in the plug sealing groove to prevent the glue from overflowing from the screw. The material of the center plug is not limited.

[0025] The end cover 10 includes an end cover 110 and a pressing plate 120, each of which has a through hole at the center. The end cover 110 and the pressing plate 120 can be detachably crimped. Figure 2As shown, a surface of the pressing plate 120 is provided with three layers of annular walls 1210 from the center to the periphery, and the top surfaces of the three layers of annular walls 1210 are sealed with the outer cover surface of the end cover 110 to form a surrounding film thread port sealing glue cavity and a packaging glue cavity.

[0026] The top walls of the three-layer annular wall 1210 are all provided with sealing grooves, and sealing rings are provided in the sealing grooves. The pressing plate 120 is crimped with the end cover 110 through the clamping screws, and under the action of the three sealing rings, a closed encapsulation glue cavity and a membrane wire plugging glue cavity are formed between the pressing plate 120 and the bottom surface of the end cover, thereby preventing the glue from leaking out.

[0027] like Figure 3 As shown, there are multiple film thread port plugging glue outlets, which are annularly arranged on the cover of the end cover 110 and located between the two innermost ring walls 1210; there are multiple packaging glue outlets, which are annularly arranged on the cover and located between the two outermost ring walls 1210. When the film thread port is plugged, the glue flows out from the film thread port plugging glue cavity through the film thread port plugging glue outlet, and under the action of the centrifugal force of the centrifuge, it is always located at the bottom of the cover of the end cover 110, and then flows into the nearby film thread port to solidify to form a plug.

[0028] The packaging glue outlet includes a plurality of inner glue inlets 1110 and a plurality of outer glue inlets 1120. The plurality of outer glue inlets 1120 are arranged around the plurality of inner glue inlets 1110. An annular partition wall 100 is arranged between the plurality of outer glue inlets 1120 and the plurality of inner glue inlets 1110. The casting end cover also includes a plurality of inner glue inlet pipes 130. The plurality of inner glue inlet pipes 130 and the pressing plate 120 are respectively located on both sides of the end cover 110. The plurality of inner glue inlet pipes 130 are fixedly arranged on the plurality of inner glue inlets 1110 in a one-to-one correspondence. The plurality of inner glue inlet pipes 130 and the plurality of inner glue inlets 1110 are sealed by crimping.

[0029] The inner glue inlet pipe 130 is fixed to the inner glue inlet port 1110 on the inner bottom surface of the end cap through a conical surface, and is used to allow the packaging glue to enter the end cap and the membrane shell, so that the end cap produces a glue layer of about 1.5 cm, and the inside of the membrane shell produces a glue layer of about 4 cm, so as to achieve membrane filament packaging, and the material is not limited. The outer glue inlet is used to realize the glue inlet of the inner glue inlet pipe and the inner wall of the membrane shell respectively, so as to achieve rapid glue inlet of the packaging glue, and the number of glue ports is not limited.

[0030] For example Figure 1 As shown, the casting end cover assembly 10 also includes a first injection joint and a second injection joint. The first injection joint is sealed and connected to the membrane thread sealing glue inlet, and is used to inject the corresponding glue liquid into the outer membrane thread sealing glue cavity. The second injection joint is sealed and connected to the packaging glue inlet, and is used to inject the corresponding glue liquid into the packaging glue cavity.

[0031] like Figure 4As shown, a casting device for an ultrafiltration membrane comprises a membrane shell 1 with openings at both ends, two casting end cap assemblies and two pairs of annular clamps, and the side walls of the two casting end caps are detachably sealed with the end walls of the membrane shell 1. The specific method of sealing connection can be that each casting end cap and the membrane shell 1 are sealed in section through a pair of semi-annular clamps 2. The section of the casting end cap that contacts and fits the membrane shell can be provided with a sealing groove, and a sealing ring is provided in the sealing groove to make the connection sealed.

[0032] The present invention also includes a method for casting an ultrafiltration membrane assembly using the above casting device, the specific steps of which are:

[0033] Install the end distributor 40 and the membrane filament 30 in the casting device. After installation, cover the casting end caps and place the casting device in the centrifuge for fixing; weigh the membrane filament port plugging glue and inject it into the membrane filament port plugging glue cavity of the casting end caps at both ends respectively, turn on the centrifuge, and make the membrane filament port plugging glue at both ends respectively concentrate at the bottom of the casting end caps at both ends until they enter the ports at both ends of the membrane filament and solidify; after the membrane filament port plugging glue at both ends is solidified, weigh the encapsulation glue and inject it into the encapsulation glue cavity of the casting end caps at both ends respectively, turn on the centrifuge again, and make the encapsulation glue at both ends respectively concentrate in the casting end caps at both ends and the two end ports of the membrane shell, and solidify; remove the casting device from the centrifuge, and the casting is completed.

[0034] Among them, the installation method of the membrane filament 30 and the end distributor 40 is to install the two end distributors 40 at the two ends of the inside of the membrane shell 1 respectively, let the membrane filament pass through the positioning holes on the two end distributors 40, and cut the membrane filament so that its two ends are respectively set close to the inner bottom surface of the casting end cover at both ends.

[0035] In the step of injecting the plugging glue at the membrane thread port, the depth of the plugging glue entering the membrane thread port and solidifying is 0.5-1 cm; in the step of injecting the encapsulation glue, the depth of the encapsulation glue entering the membrane shell port and solidifying is 4-5 cm. The above parameter settings can ensure the plugging effect of the membrane thread port and improve the casting success rate of the filtration membrane assembly.

[0036] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A casting end cap for an ultrafiltration membrane, characterized in that: It comprises an end cover portion (10) provided with a central through hole and a central plug (20), wherein the central plug (20) passes through the central through hole and is sealed and detachably connected to the end cover portion (10), wherein a film thread sealing glue cavity and a packaging glue cavity are provided inside the end cover portion (10), and a film thread sealing glue inlet and a packaging glue inlet are correspondingly provided on its outer wall, and a film thread sealing glue outlet and a packaging glue outlet are correspondingly provided on its inner wall; The end cover portion (10) comprises an end cover (110) and a pressure plate (120) both of which are provided with a through hole at the center. The end cover (110) and the pressure plate (120) are detachably crimped, wherein one surface of the pressure plate (120) is provided with three layers of annular walls (1210) from the center to the periphery, and the top surfaces of the three layers of annular walls (1210) are all sealed to the outer cover surface of the end cover (110), so as to form the surrounding membrane thread port sealing glue cavity and the packaging glue cavity.

2. The casting end cap according to claim 1, characterized in that: The membrane thread port plugging glue outlet is multiple and is arranged in a ring shape on the cover portion of the end cover (110) and is located between the two innermost layers of the annular wall (1210); the packaging glue outlet is multiple and is arranged in a ring shape on the cover portion and is located between the two outermost layers of the annular wall (1210).

3. The casting end cap according to claim 2, characterized in that: The packaging glue outlet comprises a plurality of inner glue inlets (1110) and a plurality of outer glue inlets (1120), the plurality of outer glue inlets (1120) being arranged around the plurality of inner glue inlets (1110), and an annular partition wall (100) being provided between the plurality of outer glue inlets (1120) and the plurality of inner glue inlets (1110).

4. The casting end cap according to claim 3, characterized in that: The casting end cover further comprises a plurality of inner glue inlet pipes (130), wherein the plurality of inner glue inlet pipes (130) and the pressing plate (120) are respectively located on two sides of the end cover (110), and the plurality of inner glue inlet pipes (130) are fixedly arranged on the plurality of inner glue inlet ports (1110) in a one-to-one correspondence, and the plurality of inner glue inlet pipes (130) and the plurality of inner glue inlet ports (1110) are sealed by crimping.

5. The casting end cap according to claim 1, characterized in that: The casting end cover also includes a first injection joint and a second injection joint, the first injection joint is sealingly connected to the inlet of the film thread sealing glue, and the second injection joint is sealingly connected to the inlet of the packaging glue.

6. The casting end cap according to claim 1, characterized in that: A locking bolt is provided at one end of the center plug (20), and a step structure is provided on the periphery of the middle portion of the center plug (20). The center plug clamps the end cover (10) from both sides through the step structure and the locking bolt, thereby achieving fixation with the end cover (10).

7. A casting device for ultrafiltration membrane, characterized in that: It comprises a membrane shell (1) with openings at both ends, two pairs of semi-annular hoops (2) and two casting end covers as claimed in any one of claims 1 to 6, wherein the two casting end covers are respectively located at the two ends of the membrane shell (1), and each of the casting end covers is sealedly connected to the cross section of the membrane shell (1) through a pair of semi-annular hoops (2).

8. A method for casting an ultrafiltration membrane module using the casting device according to claim 7, characterized in that: The following steps are involved: Installing an end distributor (40) and a membrane filament (30) in the casting device; Place the installed casting device in the centrifuge and fix it; Weigh the membrane thread port plugging glue and inject it into the membrane thread port plugging glue cavity of the two casting end caps respectively; Turn on the centrifuge to make the plugging glue at the two ends of the membrane thread be concentrated at the bottom of the casting end caps at the two ends, until it enters the ports at the two ends of the membrane thread and solidifies; After the plugging glue at the membrane thread port is solidified, the packaging glue is weighed and injected into the packaging glue cavities of the two end casting end caps respectively, and the centrifuge is turned on again to make the packaging glue at both ends of the membrane shell in the two end casting end caps respectively be concentrated and solidified; The casting device is removed from the centrifuge and the casting is completed.

9. The casting method according to claim 8, characterized in that: In the step of injecting the plugging glue into the membrane thread port, the plugging glue into the membrane thread port and solidifies to a depth of 0.5-1 cm; In the step of injecting the packaging glue, the packaging glue enters the mouth of the membrane shell and solidifies to a depth of 4-5 cm.

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