A device for removing and installing RO membrane end caps

Abstract

A device for disassembling and assembling RO membrane end caps is disclosed. When disassembling the RO membrane end cap, the specific connection is as follows: a square nut is positioned on the cross-shaped cover plate of the main body of the fixture, with its four square protrusions facing upwards. The adjusting screw passes through the square nut and the cross-shaped cover plate in sequence. The screw fixed on the screw is placed inside the stepped hole of the pressure cap, and the external thread I of the screw is screwed together with the internal thread of the large-diameter screw hole in the stepped hole. When assembling the RO membrane end cap, the specific connection is as follows: a square nut is positioned below the cross-shaped cover plate of the main body of the fixture, with its four square protrusions engaging with the four corners of the cross-shaped cover plate. The adjusting screw passes through the cross-shaped cover plate and the square nut in sequence. The screw fixed on the screw is placed inside the small-diameter hole of the stepped hole in the pressure cap, and the external thread I of the screw is outside the stepped hole. This significantly shortens the downtime of the reverse osmosis unit and improves the production efficiency of reclaimed water.

Description

Technical Field

[0001] This utility model relates to a device for disassembling and assembling RO membrane end caps, belonging to the field of mechanical tooling technology. Background Technology

[0002] Urban wastewater reuse is an effective way to increase water supply and reduce water pollution, improve the ecological environment, and solve urban water shortage problems. RO reverse osmosis membrane (hereinafter referred to as RO membrane) is the filtration device of the reverse osmosis unit in wastewater reuse treatment equipment. Multiple RO membranes are installed in the RO membrane shell of the reverse osmosis unit through RO membrane end caps.

[0003] Ultrafiltration permeate is boosted by a pump and passes through a security filter before entering the reverse osmosis (RO) unit. The RO unit has extremely high desalination capacity and adopts a one-stage, two-section configuration. The RO membrane is a spiral wound structure, which is based on the reverse osmosis principle. A semi-permeable membrane, a flow guide layer, and a separator are arranged and wound onto a central tube with perforations. Raw water enters the separator layer from one end of the RO membrane. When passing through the separator layer, under pressure, some water permeates through the semi-permeable membrane into the flow guide layer and flows parallel to the central tube through the flow guide layer channels to form regenerated water. The remaining concentrated water is discharged from the other end of the separator layer as concentrate.

[0004] RO membrane end cap sealing rings need to be replaced regularly; otherwise, aging sealing rings can easily lead to leaks, directly affecting the operation of reclaimed water production. When replacing the sealing rings, the reverse osmosis unit must be shut down. Two bolts are screwed into the two screw holes on the RO membrane end cap. A pry bar is then used to forcefully pry the two bolts to remove the RO membrane end cap and complete the sealing ring replacement. Uneven force can cause the bolts to slip, rendering the RO membrane end cap unusable. Furthermore, a reverse osmosis unit typically consists of 57 RO membrane housings, each with an RO membrane end cap at both ends. Replacing the sealing ring of one RO membrane end cap takes 15 minutes; replacing the sealing rings of 114 RO membrane housings takes approximately 29 hours, directly impacting the efficiency of reclaimed water production. Utility Model Content

[0005] In view of the technical problems existing in the prior art, this utility model provides a device for disassembling and assembling RO membrane end caps, which can quickly complete the disassembly and assembly of RO membrane end caps for replacing sealing rings, greatly shortening the downtime of reverse osmosis units, improving the production efficiency of reclaimed water, and eliminating the occurrence of RO membrane end cap scrapping that is easily caused when replacing sealing rings of RO membrane end caps in the prior art.

[0006] The technical solution adopted by this utility model is as follows: a device for disassembling and assembling RO membrane end caps, including a tooling body, a square nut, an adjusting screw, and a pressure cap; when disassembling the RO membrane end cap, the specific connection relationship is as follows: the square nut is set on the cross-shaped cover plate of the tooling body, with the four square protrusions of the square nut facing upwards; the adjusting screw passes through the square nut and the cross-shaped cover plate in sequence; the screw fixed on the screw is placed in the stepped hole of the pressure cap; the external thread I of the screw is screwed together with the internal thread of the large-diameter screw hole of the stepped hole; when assembling the RO membrane end cap, the specific connection relationship is as follows: the square nut is set under the cross-shaped cover plate of the tooling body, with the four square protrusions of the square nut contacting and engaging with the four corners of the cross-shaped cover plate; the adjusting screw passes through the cross-shaped cover plate and the square nut in sequence; the screw fixed on the screw is placed in the small-diameter hole of the stepped hole of the pressure cap; the external thread I of the screw is placed outside the stepped hole.

[0007] The beneficial effects of this utility model are: (1) Using the device for disassembling and assembling RO membrane end caps of this utility model, it only takes 5 minutes to replace the sealing ring of one RO membrane end cap, and about 9.5 hours to replace the sealing rings of 114 RO membrane end caps, which greatly shortens the downtime of the reverse osmosis unit and improves the production efficiency of reclaimed water.

[0008] (2) The RO membrane end cap sealing ring can be replaced by a single person using an electric wrench. It is labor-saving, time-saving, fast, safe, stable and short-term, greatly reducing labor intensity and improving work efficiency.

[0009] (3) The structure of this utility model is simple, easy to carry, easy to maintain, not easy to break and easy to care for. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the device structure for setting the square nut on the cross-shaped cover plate of the tooling body;

[0011] Figure 2 This is a schematic diagram of the device structure for setting the square nut under the cross-shaped cover plate of the tooling body;

[0012] Figure 3 for Figure 1 Top view of the structure;

[0013] Figure 4 for Figure 1 A sectional view of the structure;

[0014] Figure 5 for Figure 2 Top view of the structure;

[0015] Figure 6 for Figure 2 A sectional view of the structure;

[0016] Figure 7 This is a schematic diagram of the main structure of the tooling body of this utility model;

[0017] Figure 8 This is a cross-sectional view of the square nut of this utility model;

[0018] Figure 9 This is an exploded view of the adjusting screw structure of this utility model;

[0019] Figure 10 This is a cross-sectional view of the structure of the pressure cap of this utility model;

[0020] Figure 11 This is a schematic diagram of the structure of the end cap of an existing RO membrane.

[0021] Figure 12 This is a schematic diagram of the structure for disassembling the RO membrane end cap inside the RO membrane housing according to an embodiment of this utility model;

[0022] Figure 13 This is a schematic diagram of the structure of the RO membrane end cap installed inside the RO membrane housing according to an embodiment of the present invention.

[0023] In the diagram: 1. Main body of the tooling; 1-1. Cross-shaped cover plate; 1-1-1. Lead screw hole; 1-2. Open-shaped retaining ring; 1-2-1. Open wall hole; 1-3. Vertical wall; 1-4. Locking bolt; 1-5. Open rubber gasket; 2. Square nut; 2-1. Square protrusion; 2-2. Lead screw hole; 3. Adjusting lead screw; 3-1. Lead screw; 3-1-1. External thread I; 3-1-2. Hexagonal head; 3-1-3. 3-2. Threaded blind hole; 3-3. Screw nut; 4. Pressure cap; 4-1. Circular body; 4-1-1. External thread II; 4-2. Stepped hole; 4-2-1. Large diameter screw hole; 4-2-11. Internal thread; 4-2-2. Small diameter hole; 5. RO membrane housing; 5-1. Groove; 6. RO membrane end cap; 6-1. Front port; 6-2. Rear port; 6-3. Sealing ring; 6-4. Arc-shaped connecting piece. Detailed Implementation

[0024] like Figures 1 to 6 As shown, a device for disassembling and assembling RO membrane end caps includes a tooling body 1, a square nut 2, an adjusting screw 3, and a pressure cap 4.

[0025] Place the square nut 2 on the cross-shaped cover plate 1-1 of the tooling body 1, with the four square protrusions 2-1 on the bottom surface of the square nut 2 facing upwards, and the front of the square nut 2 contacting and engaging with the top of the cross-shaped cover plate 1-1; screw one end of the screw 3-2 into the upper part of the threaded blind hole 3-1-3 of the lead screw 3-1, and screw the nut 3-3 onto the shorter part of the screw 3-2 that extends out of the threaded blind hole 3-1-3, and tighten the nut 3-3 to fix the screw 3-2 onto the lead screw 3-1; pass the lead screw 3-1 sequentially through the lead screw hole 2-2 of the square nut 2 and the lead screw hole 1-1-1 of the cross-shaped cover plate 1-1 (at this time, the outer surface of the lead screw 3-1...) The thread I3-1-1 and the square nut 2 are screwed together. The screw hole 1-1-1 of the cross-shaped cover plate 1-1 is not threaded. The screw 3-1 and the screw hole 1-1-1 are in clearance fit. The shorter screw 3-2 fixed on the screw 3-1 is placed in the stepped hole 4-2 of the pressure plate 4. The external thread I3-1-1 of the screw 3-1 is screwed together with the internal thread 4-2-11 of the large-diameter screw hole 4-2-1. The square nut 2 is rotated clockwise with a tool. Through the fit between the internal thread of the screw hole 2-2 of the square nut 2 and the external thread I3-1-1 of the screw 3-1, the screw 3-1 drives the pressure plate 4 to move upward, thereby realizing the disassembly of the RO membrane end cap.

[0026] Place the square nut 2 under the cross-shaped cover plate 1-1 of the main body of the tooling 1. The bottom surface of the square nut 2 contacts and engages with the bottom surface of the cross-shaped cover plate 1-1. The four square protrusions 2-1 on the bottom surface of the square nut 2 contact and engage with the four right angles of the cross-shaped cover plate 1-1. Screw one end of the screw 3-2 into the middle position of the threaded blind hole 3-1-3 of the lead screw 3-1. Screw the nut 3-3 onto the longer part of the screw 3-2 that extends out of the threaded blind hole 3-1-3. Tighten the nut 3-3 to fix the screw 3-2 onto the lead screw 3-1. Pass the lead screw 3-1 through the ten... The cross-shaped cover plate 1-1 has a lead screw hole 1-1-1 and a square nut 2 has a lead screw hole 2-2 (at this time, the lead screw hole 1-1-1 of the cross-shaped cover plate 1-1 is not threaded, the lead screw 3-1 and the lead screw hole 1-1-1 are in a clearance fit relationship, and the external thread I 3-1-1 of the lead screw 3-1 is in a screwed relationship with the square nut 2). The longer screw 3-2 fixed on the lead screw 3-1 is placed at the top of the small diameter hole 4-2-2 of the stepped hole 4-2 of the pressure cover 4 (the small diameter hole 4-2-2 is not threaded), and the external thread I 3-1-1 of the lead screw 3-1 is placed outside the large diameter screw hole 4-2-1.

[0027] Using a tool, rotate the lead screw 3-1 clockwise through the hexagonal head 3-1-2. Through the engagement of the external thread Ⅰ3-1-1 of the lead screw 3-1 with the internal thread of the lead screw hole 2-2 of the square nut 2, the lead screw 3-1 drives the pressure cap 4 to move downward, thereby realizing the installation of the RO membrane end cap.

[0028] like Figure 7As shown, the main body of the tooling 1 consists of a cross-shaped cover plate 1-1, an open-shaped retaining ring 1-2, vertical walls 1-3, locking bolts 1-4, and open rubber pads 1-5. An open rubber pad 1-5 is fixed inside the open-shaped retaining ring 1-2. One end of each of the four vertical walls 1-3 is welded to the open-shaped retaining ring 1-2, and the other end is welded to the cross-shaped cover plate 1-1. Locking bolts 1-4 are provided in the two open wall holes 1-2-1 at one end of the open-shaped retaining ring 1-2. A lead screw hole 1-1-1 is provided at the center of the cross-shaped cover plate 1-1.

[0029] like Figure 8 As shown, a square protrusion 2-1 is provided at each of the four right angles on one side of the square nut 2, and a connecting screw hole 2-2 is provided at the center of the upper and lower surfaces of the square nut 2.

[0030] like Figure 9 As shown, the adjusting screw 3 consists of a screw 3-1, a screw 3-2, and a nut 3-3. The screw 3-1 has an external thread I 3-1-1. One end of the external thread I 3-1-1 of the screw 3-1 has a hexagonal head 3-1-2, and the other end has a threaded blind hole 3-1-3. One end of the screw 3-2 is screwed into the threaded blind hole 3-1-3, and the other end of the screw 3-2 extends out of the threaded blind hole 3-1-3 and is screwed into the nut 3-3. The nut 3-3 is used to adjust the length of the screw 3-2 extending out of the threaded blind hole 3-1-3.

[0031] like Figure 10 As shown, the pressure cap 4 is a circular barrel shape. A circular body 4-1 is provided at the center of the cavity of the pressure cap 4. An external thread II 4-1-1 is provided on the outer circular surface of the circular body 4-1. A stepped hole 4-2 communicating with the circular body 4-1 is provided at the center of the pressure cap 4. The stepped hole 4-2 is composed of a large-diameter screw hole 4-2-1 and a small-diameter hole 4-2-2.

[0032] Example 1: A method of using a device for disassembling and assembling RO membrane end caps, as follows: Figure 11 , Figure 12 , Figure 13 As shown, the method for removing the RO membrane end cap is as follows:

[0033] Step 1: Fit the open-shaped retaining ring 1-2 of the tooling body 1 onto the RO membrane housing 5 of the reverse osmosis unit. Set the locking bolt 1-4 in the two open wall holes 1-2-1. Adjust the position of the tooling body 1 and tighten the locking bolt 1-4 to fix the tooling body 1 onto the RO membrane housing 5. The open rubber gasket 1-5 fixed inside the open-shaped retaining ring 1-2 can ensure that the tooling body 1 does not shift when the RO membrane end cap is removed.

[0034] Step 2: Remove the plug on the front port 6-1 of the RO membrane end cap 6 inside the RO membrane housing 5. Thread the pressure cap 4 to the front port 6-1 of the RO membrane end cap 6 through the external thread Ⅱ4-1-1 of the circular body 4-1. Remove the four arc-shaped connecting pieces 6-4, which are stuck in the groove 5-1 of the RO membrane housing 5 at one end and fixed to the RO membrane end cap 6 at the other end.

[0035] Step 3: Place the square nut 2 on the cross-shaped cover plate 1-1 of the main body of the tooling 1. The four square protrusions 2-1 on the bottom surface of the square nut 2 face outwards, and the front of the square nut 2 contacts and engages with the top of the cross-shaped cover plate 1-1. Screw 3-2 is screwed into the upper part of the threaded blind hole 3-1-3 of the lead screw 3-1. The short screw 3-2 extending out of the threaded blind hole 3-1-3 is screwed into the screw nut 3-3. Tighten the screw nut 3-3 to fix the screw 3-2 onto the lead screw 3-1. Pass the lead screw 3-1 through the lead screw hole 2-2 of the square nut 2 and the lead screw hole 1-1-1 of the cross-shaped cover plate 1-1 in sequence. The shorter screw 3-2 fixed on the lead screw 3-1 is placed in the stepped hole 4-2 of the pressure cap 4. The external thread I 3-1-1 of the lead screw 3-1 is screwed together with the internal thread 4-2-11 of the large-diameter screw hole 4-2-1.

[0036] Step 4: Use a tool to rotate the square nut 2 clockwise. The cross-shaped cover plate 1-1 serves as the rotation support for the square nut 2. The rotation of the square nut 2 drives the lead screw 3-1 to move evenly outward along the RO membrane housing 5 axis. The lead screw 3-1 drives the RO membrane end cap 6 to move steadily outward from the RO membrane housing 5 through the pressure cover 4. Remove the device and the RO membrane end cap 6 to disassemble the RO membrane end cap 6 and complete the replacement of the sealing ring 6-3 of the RO membrane end cap 6.

[0037] The method for installing the RO membrane end cap is as follows: Step 1, place the RO membrane end cap 6 after replacing the sealing ring 6-3 inside the RO membrane housing 5, and put the open-shaped retaining ring 1-2 of the tool body 1 onto the RO membrane housing 5 of the reverse osmosis unit. The locking bolt 1-4 is set in the two open wall holes 1-2-1. Adjust the position of the tool body 1 and tighten the locking bolt 1-4 to fix the tool body 1 on the RO membrane housing 5. The open rubber gasket 1-5 fixed inside the open-shaped retaining ring 1-2 can ensure that the tool body 1 does not shift when disassembling the RO membrane end cap.

[0038] Step 2: Connect the pressure cap 4 to the front port 6-1 of the RO membrane end cap 6 inside the RO membrane housing 5 via the external thread Ⅱ4-1-1 of the circular body 4-1.

[0039] Step 3: Place the square nut 2 below the cross-shaped cover plate 1-1 of the main body of the tooling 1. The bottom surface of the square nut 2 contacts and engages with the bottom surface of the cross-shaped cover plate 1-1. The four square protrusions 2-1 on the bottom surface of the square nut 2 contact and engage with the four right angles of the cross-shaped cover plate 1-1. Screw 3-2 into the middle position of the threaded blind hole 3-1-3 of the lead screw 3-1. The longer portion of screw 3-2 extending out of the threaded blind hole 3-1-3 is screwed into the nut 3-3. Tighten the nut. 3-3 Fix screw 3-2 to lead screw 3-1; pass lead screw 3-1 through lead screw hole 1-1-1 of cross-shaped cover plate 1-1 and lead screw hole 2-2 of square nut 2 in sequence; place the longer screw 3-2 fixed on lead screw 3-1 in the small diameter hole 4-2-2 of stepped hole 4-2 of pressure cover 4; place the end of screw 3-2 in the top of the small diameter hole 4-2-2 of stepped hole 4-2; place the end of external thread I 3-1-1 of lead screw 3-1 outside the large diameter screw hole 4-2-1.

[0040] Step 4: Using a tool, rotate the screw 3-1 clockwise through the hexagonal head 3-1-2 of the screw 3-1. The cross-shaped cover plate 1-1 serves as a positioning support for the square nut 2, allowing the screw 3-1 to move evenly inward along the RO membrane housing 5 axis. The screw 3-1, through the pressure cap 4, drives the RO membrane end cap 6 to move steadily into the opening of the RO membrane housing 5 until the other end of the RO membrane end cap 6, the rear tube 6-2, is connected to the central tube of the RO membrane. Remove the device and connect it to the front tube 6-1 of the RO membrane end cap 6 with a tube plug. Insert one end of each of the four arc-shaped connecting pieces 6-4 into the grooves 5-1 around the inner surface of the RO membrane housing 5. Fix the other ends of the four arc-shaped connecting pieces 6-4 to the RO membrane end cap 6 with bolts, thus completing the installation of the RO membrane end cap 6.

[0041] The RO membrane inside the RO membrane housing 5 can also be replaced by following the above steps of disassembling and installing the RO membrane end cap.

Claims

1. A device for disassembling an end cap of a reverse osmosis membrane, characterized in that: Includes the main tooling body, square nut, adjusting screw, and pressure cap; When disassembling the RO membrane end cap, the specific connection relationship is as follows: the square nut is set on the cross-shaped cover plate of the tooling body, the four square protrusions of the square nut face upwards, the lead screw of the adjusting lead screw passes through the square nut and the cross-shaped cover plate in sequence, the screw fixed on the lead screw is placed in the stepped hole of the pressure cap, and the external thread I of the lead screw is screwed together with the internal thread of the large-diameter screw hole of the stepped hole. When installing the RO membrane end cap, the specific connection relationship is as follows: the square nut is set under the cross-shaped cover plate of the tooling body, the four square protrusions of the square nut are in contact with the four corners of the cross-shaped cover plate, the lead screw of the adjusting screw passes through the cross-shaped cover plate and the square nut in sequence, the screw fixed on the lead screw is placed in the small diameter hole of the stepped hole of the pressure cap, and the external thread I of the lead screw is placed outside the stepped hole.

2. The device for disassembling the end cover of the RO membrane according to claim 1, characterized in that: The main body of the tooling consists of a cross-shaped cover plate, an open-shaped retaining ring, vertical walls, locking bolts, and open rubber pads. An open rubber pad is fixed inside the open-shaped retaining ring. One end of each of the four vertical walls is fixed to the open-shaped retaining ring, and the other end is fixed to the cross-shaped cover plate. Locking bolts are provided in the two open wall holes at one end of the open-shaped retaining ring. A lead screw hole is provided at the center of the cross-shaped cover plate.

3. The device for disassembling the end cover of the RO membrane according to claim 1, characterized in that: The square nut has a square protrusion at each of the four right angles on one side, and the square nut has a connecting screw hole at the center of the top and bottom surfaces.

4. The device for disassembling the end cover of the RO membrane according to claim 1, characterized in that: The adjusting screw consists of a screw, a screw, and a nut. The screw has an external thread I. One end of the external thread I has a hexagonal head, and the other end has a threaded blind hole. One end of the screw is screwed into the threaded blind hole, and the other end of the screw extends out of the threaded blind hole and is screwed into the nut. The nut is used to adjust the length of the screw extending out of the threaded blind hole.

5. The device for disassembling the end cover of the RO membrane according to claim 1, characterized in that: The cap is cylindrical, with a circular body at the center of the cavity. The outer surface of the circular body has an external thread II. The center of the cap has a stepped hole that communicates with the circular body. The stepped hole consists of a large-diameter screw hole and a small-diameter hole.

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