Membrane element expansion rod assembly

Abstract

The utility model discloses a membrane element expansion rod assembly which comprises a fixing sleeve and a hollow pipe body arranged on a fixing position, and the pipe body of the fixing sleeve is provided with at least one through groove in the length direction of the fixing sleeve. The expansion rod core shaft is movably arranged in the fixing sleeve in the axial direction, at least one concave conical surface is arranged on a shaft body of the expansion rod core shaft, and the conical surface passes through the through groove when moving in the axial direction; the key is arranged in the through groove in a matched mode, at least one circle of positioning groove is formed along the key and the circumferential outer wall of the fixing sleeve where the key is located, the side, close to the expansion rod mandrel, of the key is arranged to be an inclined face, and the inclined face is matched with the conical face; the tensioning ring is embedded in the positioning groove; and the air cylinder is connected to the end part of the expansion rod mandrel. The product has the advantages of being fast to mount and dismount, high in reliability and adaptability, convenient to maintain and capable of providing uniformity of circumferential and axial tensioning force.

Description

TECHNICAL FIELD

[0001] The utility model relates to a membrane element expansion rod, especially to a membrane element expansion rod assembly. BACKGROUND

[0002] The main function of reverse osmosis membrane is to remove the impurities such as dissolved salts, colloids, microorganisms and organic matters in water, so as to obtain high-quality pure water. The reverse osmosis membrane is usually wound on a center pipe, that is, a plurality of membrane sheets are alternately stacked with water production / water inlet grids, and the edge is sealed after being coated with glue and then wound on the center pipe. A expansion rod is arranged in the center pipe, and the expansion rod is used to drive the center pipe to rotate to wind the reverse osmosis membrane. The existing expansion rod is usually connected by individual sections, and a screw is arranged in the middle of the section body. By tightening the screw, the individual sections are expanded to play the role of the expansion rod. The expansion rod has the following disadvantages: the expansion stability of the expansion rod is insufficient due to the loosening of the screw; the contact area with the center pipe cannot be substantially increased; and the operation process of the existing expansion rod is complicated. Therefore, there is an urgent need for a more stable and convenient membrane element expansion rod. SUMMARY

[0003] In order to solve the above technical problems, the utility model provides a membrane element expansion rod assembly.

[0004] In order to solve the above technical problems, the utility model adopts the technical scheme of a membrane element expansion rod assembly, which comprises:

[0005] A fixed sleeve is provided with a hollow pipe body at a fixed position, and at least one through slot is formed in the pipe body of the fixed sleeve along the length direction thereof;

[0006] A expansion rod shaft is movably arranged in the fixed sleeve in the axial direction, and the shaft body of the expansion rod shaft has at least one concave taper surface, and the taper surface passes through the through slot when moving in the axial direction;

[0007] A key is matched and arranged in the through slot, and at least one positioning groove is formed in the circumferential outer wall of the key and the fixed sleeve where the key is arranged, the key is arranged as an inclined surface on the side close to the expansion rod shaft, and the inclined surface is matched with the taper surface;

[0008] A expansion ring is embedded in the positioning groove;

[0009] A gas cylinder is connected to the end of the expansion rod shaft.

[0010] Further, the outer diameter of the expansion rod shaft is matched with the inner diameter of the fixed sleeve.

[0011] Further, the shaft body of the expansion rod shaft has one concave taper surface.

[0012] Further, the through grooves are multiple, and the multiple through grooves are uniformly distributed in the circumferential direction of the fixing sleeve, the multiple through grooves are aligned with the conical surfaces, and the keys located in the through grooves are embedded into the conical surfaces of the expansion rod shaft.

[0013] Further, the expansion rod shaft has two concave conical surfaces on the shaft body, and the two concave conical surfaces are arranged in parallel along the axial direction of the expansion rod shaft.

[0014] Further, the through grooves are multiple, and the multiple through grooves are uniformly distributed in the axial direction of the fixing sleeve, each through groove is aligned with a conical surface, and the keys located in the through grooves are embedded into the conical surfaces of the expansion rod shaft.

[0015] Further, the positioning grooves are multiple, and each positioning groove is embedded with an expansion ring.

[0016] The utility model discloses a membrane element expansion rod assembly, and the membrane element expansion rod assembly has the following advantages:

[0017] Quick installation and disassembly: through the mechanical structure design of the expansion ring and the key, the quick expansion and release of the center pipe are realized, the installation, disassembly efficiency and operation convenience of the membrane element are greatly improved, the expansion rod shaft driven by the air cylinder makes the operation simple, and the expansion or release expansion action can be completed only by starting the air cylinder, without complex tools or manual operation.

[0018] Reliability: the elasticity of the expansion ring and the accurate matching of the key and the conical surface guarantee the stability and reliability of the expansion effect, and ensure that the membrane element does not affect the performance due to loosening in the working process.

[0019] Strong adaptability: the number of through grooves can be appropriately adjusted according to the circumference of the fixing sleeve, so that the assembly can be applied to center pipes of different specifications, and the application range of the assembly is increased.

[0020] Convenient maintenance: the design of the expansion ring and the key makes the maintenance and replacement of parts simple, and reduces the maintenance cost and downtime.

[0021] Provide the uniformity of circumferential and axial expansion force, and the multiple through grooves distributed along the axial direction or the axial direction can provide more uniform expansion force in different directions, and adapt to various types of center pipes. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structure schematic view of the utility model embodiment one.

[0023] Figure 2 It is a structure disassembly schematic view of the utility model embodiment one.

[0024] Figure 3 It is a structure schematic view of the utility model embodiment two.

[0025] Figure 4The structure disassembling schematic view of the second embodiment of the utility model.

[0026] Figure 5 The structure schematic view when the key is gradually jacked up of the first embodiment of the utility model.

[0027] In the drawing: 1, fixed sleeve; 2, jack rod mandrel; 3, key; 4, positioning groove; 5, expansion ring; 6, air cylinder; 11, through groove; 21, conical surface; 31, inclined surface. DETAILED DESCRIPTION

[0028] The utility model will be further explained in detail in connection with the drawings and specific implementation.

[0029] First embodiment,

[0030] As Figure 1 And Figure 2 The film element jack rod assembly shown in the drawing, comprising:

[0031] Fixed sleeve 1, hollow pipe body is set on the fixed position, when using, can be fixed through the film system support or fixed mechanism, the pipe body of fixed sleeve 1 is provided with four through grooves 11 along its length direction, four through grooves 11 are evenly distributed in the circumferential direction of fixed sleeve 1, preferably, the four through grooves 11 are aligned along the axial direction;

[0032] Jack rod mandrel 2 is movably arranged in fixed sleeve 1 along the axial direction, the outer diameter of jack rod mandrel 2 matches the inner diameter of fixed sleeve 1, so that jack rod mandrel 2 is in contact with fixed sleeve 1, in order to improve the activity effect of jack rod mandrel 2, the contact surface of the two can be set as a smooth surface. The shaft body of jack rod mandrel 2 has an inner concave conical surface 21, that is, a conical body is formed inwardly recessed in jack rod mandrel 2, and the conical surface 21 passes through the position of the through groove 11 when moving along the axial direction;

[0033] Key 3 is matched and arranged in the through groove 11, and can be forced in and out of the through groove 11, a positioning groove 4 is formed on the circumferential outer wall of the fixed sleeve 1 along the key 3, the side of the key 3 close to the jack rod mandrel 2 is set as an inclined surface 31, the inclined surface 31 matches the conical surface 21, and the inclined surface 31 is in abutment with the conical surface 21 when the key 3 is completely matched in the through groove 11. In this embodiment, the four through grooves 11 are aligned with the conical surface 21, and the key 3 in the through groove 11 can be embedded in the conical surface 21 of the jack rod mandrel at the same time, and in other embodiments, the number of through grooves 11 is appropriately adjusted according to the circumference of the fixed sleeve 1.

[0034] Expansion ring 5 is embedded in the positioning groove 4, the expansion ring 5 is a rubber ring made of rubber material, has elasticity and can form fastening force on the key 3 in the through groove 11, and the expansion ring 5 is stretched in the positioning groove 4 when the key 3 is forced to jack up;

[0035] Cylinder 6, connected at the end of the expansion rod mandrel 2, is used to drive the expansion rod mandrel 2 to move axially in the fixed sleeve 1.

[0036] As shown in Figure 5 , the film element expansion rod assembly works, the fixed sleeve 1 is inserted into the center tube, and the fixed sleeve 1 is positioned, the cylinder 6 drives the expansion rod mandrel 2 to advance, because the key 3 in the through slot 11 is embedded in the tapered surface of the expansion rod mandrel at the same time, under the pushing action of the tapered surface of the expansion rod mandrel, the key 3 in the through slot 11 is gradually lifted, and the key 3 is gradually lifted, which constantly breaks the elastic fastening force of the expansion ring 5, so that the expansion ring 5 is stretched in the positioning groove 4, the outer end surface of the key 3 gradually lifted contacts the inner wall of the center tube, forming the expansion effect on the center tube, on the contrary, when the expansion state needs to be released, the cylinder 6 moves reversely, the expansion rod mandrel 2 retreats, the key 3 drops, and the expansion ring 5 restores to the original state under the action of elastic restoring force, so that the expansion force on the center tube is lost. At this time, the expansion ring 5 returns to the initial position in the positioning groove 4, the connection between the center tube and the fixed sleeve 1 is released, and the whole film element expansion rod assembly can be easily pulled out of the center tube or replaced. This process ensures the rapid installation and disassembly of the membrane element, and ensures the reliability of the system and the convenience of operation.

[0037] The film element expansion rod assembly in this embodiment has the following advantages:

[0038] Fast installation and disassembly: through the mechanical structure design of the expansion ring and the key, the rapid expansion and release of the center tube are realized, which greatly improves the installation, disassembly efficiency and operation convenience of the membrane element, and the expansion rod mandrel driven by the cylinder makes the operation simple, which can be completed by starting the cylinder without complex tools or manual operation.

[0039] Reliability: the elasticity of the expansion ring and the precise cooperation of the key and the tapered surface ensure the stability and reliability of the expansion effect, which ensures that the membrane element will not affect the performance due to loosening during work.

[0040] Strong adaptability: the number of through slots can be adjusted according to the circumference of the fixed sleeve, so that the assembly can be applied to different specifications of center tube, increasing the application range of the assembly.

[0041] Convenient maintenance: the design of the expansion ring and the key makes the maintenance and replacement of parts simple, reducing the maintenance cost and downtime.

[0042] Example two;

[0043] As shown in Figure 3 and Figure 4 , the film element expansion rod assembly comprises:

[0044] The fixed sleeve 1 is a hollow pipe body arranged at a fixed position and can be fixed by a film winding system support or a fixing mechanism. Two through grooves 11 are formed in the pipe body of the fixed sleeve 1 along the length direction thereof;

[0045] The expansion rod shaft 2 is movably arranged in the fixed sleeve 1 along the axial direction. The outer diameter of the expansion rod shaft 2 matches the inner diameter of the fixed sleeve 1, so that the expansion rod shaft 2 is in contact with the fixed sleeve 1. In order to improve the movement effect of the expansion rod shaft 2, the contact surface of the two can be arranged as a smooth surface. The shaft body of the expansion rod shaft 2 has two concave tapered surfaces 21, that is, two inwardly concave tapered bodies are formed in the expansion rod shaft 2. The tapered surfaces 21 pass through the positions of the through grooves 11 when moving along the axial direction;

[0046] The key 3 is arranged in the through groove 11 in a matched manner and can be moved in and out of the through groove 11 under stress. Two rings of positioning grooves 4 are formed in the circumferential outer wall of the fixed sleeve 1 along which the key 3 is arranged. The side of the key 3 close to the expansion rod shaft 2 is arranged as an inclined surface 31. The inclined surface 31 matches the tapered surface 21. When the key 3 is completely matched in the through groove 11, the inclined surface 31 abuts against the tapered surface 21. In this embodiment, the two through grooves 11 correspond to the two tapered surfaces 21. The key 3 arranged in the through groove 11 can be simultaneously embedded in the tapered surface 21 of the expansion rod shaft.

[0047] The expansion ring 5 is embedded in the positioning groove 4. The expansion ring 5 is a rubber ring made of rubber material and has elasticity to form a fastening force on the key 3 in the through groove 11. When the key 3 is stressed to be lifted outward, the expansion ring 5 is stretched in the positioning groove 4.

[0048] The cylinder 6 is connected to the end of the expansion rod shaft 2 and is used to drive the expansion rod shaft 2 to move along the axial direction in the fixed sleeve 1.

[0049] When the membrane element expansion rod assembly is in operation, the fixed sleeve 1 is inserted into the center pipe and positioned. The cylinder 6 drives the expansion rod shaft 2 to move forward. Since the key 3 in the through groove 11 is simultaneously embedded in the tapered surface 21 of the expansion rod shaft, the key 3 in the through groove 11 is gradually lifted under the driving of the two tapered surfaces of the expansion rod shaft. The key 3 is continuously broken through the elastic fastening force of the expansion ring 5 in the process of being gradually lifted, so that the expansion ring 5 is stretched in the positioning groove 4. The outer end surface of the key 3 that is gradually lifted contacts the inner wall of the center pipe to form an expansion effect on the center pipe. Conversely, when it is needed to release the expansion state, the cylinder 6 moves reversely to make the expansion rod shaft 2 retract backward. The key 3 is lowered, the expansion ring 5 is restored to the original state under the action of the elastic restoring force, so that the force for expanding the center pipe is lost. At this time, the expansion ring 5 returns to the initial position in the positioning groove 4, the connection between the center pipe and the fixed sleeve 1 is released, and the whole membrane element expansion rod assembly can be easily pulled out of the center pipe or replaced. This process ensures the rapid installation and disassembly of the membrane element and ensures the reliability of the system and the convenience of operation.

[0050] The film element expansion rod assembly in the embodiment has the following advantages compared with the first embodiment:

[0051] Uniformity of axial expansion force is provided, and two axial distribution through grooves can provide more uniform expansion force in the length direction, and adapt to longer central pipes.

[0052] The above embodiments are not a limitation on the utility model, and the utility model is not limited to the above examples. Changes, modifications, additions or replacements made by those skilled in the art within the technical scheme range of the utility model also belong to the protection range of the utility model.

Claims

1. A membrane element tensioner assembly, characterized in that, include: A fixed sleeve (1) has a hollow tube body set at a fixed position. At least one through groove (11) is provided on the tube body of the fixed sleeve (1) along its length direction. The expansion rod spindle (2) is axially movably disposed in the fixed sleeve (1). The shaft of the expansion rod spindle (2) has at least one concave conical surface (21), which passes through the through groove (11) when it moves axially. A key (3) is matched and set in the through groove (11). At least one positioning groove (4) is opened along the circumferential outer wall of the key (3) and the fixed sleeve (1) where it is located. The key (3) is set as an inclined surface (31) on the side near the expansion rod spindle (2). The inclined surface (31) matches the conical surface (21). The tensioning ring (5) is embedded in the positioning groove (4); The cylinder (6) is connected to the end of the expansion rod spindle (2).

2. The membrane element tensioner assembly according to claim 1, characterized in that: The outer diameter of the expansion rod mandrel (2) matches the inner diameter of the fixed sleeve (1).

3. The membrane element tensioner assembly according to claim 2, characterized in that: The shaft of the expansion rod spindle (2) has a concave conical surface (21).

4. The membrane element tensioner assembly according to claim 3, characterized in that: There are multiple through slots (11), which are evenly distributed in the circumferential direction of the fixed sleeve (1). The multiple through slots (11) are aligned with the conical surface (21), and the key (3) located in the through slot (11) is embedded in the conical surface (21) of the expansion rod spindle.

5. The membrane element tensioner assembly according to claim 2, characterized in that: The shaft of the expansion rod mandrel (2) has two concave conical surfaces (21), which are arranged side by side along the axial direction of the expansion rod mandrel (2).

6. The membrane element tensioner assembly according to claim 5, characterized in that: There are multiple through slots (11), which are evenly distributed along the axial direction of the fixed sleeve (1). Each through slot (11) is aligned with a conical surface (21), and the key (3) located in the through slot (11) is embedded in the conical surface (21) of the expansion rod spindle.

7. The membrane element tensioner assembly according to claim 4 or 6, characterized in that: There are multiple positioning slots (4), and each positioning slot (4) is fitted with a tensioning ring (5).

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