Protective flexible joint
By using a combination of wear-resistant hose and double flange joints in the metal soft joint, the wear and fatigue fracture problems of soft joints in the prior art when transporting silt and sand-containing liquids are solved, extending service life and reducing safety hazards.
Patent Information
- Application Number
- CN202421543496.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-07-02
AI Technical Summary
When existing metal soft joints convey liquid containing particles such as silt, sand and other particles, it is easy to cause the lining layer to fall off and wear and break, and the connection between the flange and the telescopic tube is prone to fatigue and breakage, resulting in equipment damage and safety hazards.
A protective soft joint is designed, using a combination of wear-resistant hose and double flange joints. The wear-resistant hose does not come into contact with the telescopic tube, reducing wear; the support cylinder cooperates with the flange and the connecting section to limit relative movement and reduce stress.
It extends the service life of the metal soft joints, avoids the fall off of the lining layer and fatigue breakage, reduces the maintenance cost and ensures the safety of the equipment.
Smart Images
Figure CN222760487U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of joint production, in particular to a protective flexible joint. Background Art
[0002] Metal flexible joints are flexible pressure-resistant pipe fittings installed in fluid delivery systems. They are used to compensate for the mutual displacement of pipeline or equipment connection sections, absorb vibration energy, and play a role in vibration reduction and noise reduction. Double flange metal flexible joints are widely used in flexible connections of various pumps and valves with displacement and vibration.
[0003] Currently, there are flexible joints on the market made of pure metal and those lined with polytetrafluoroethylene. When conveying liquids containing particles such as mud and sand, the mixed mud and sand will impact the inner wall of the telescopic tube, which can easily cause the lining layer of the flexible joint to fall off and wear and tear. The displacement and vibration of the connecting devices at both ends will also aggravate the falling off of the lining layer, greatly reducing the life of the flexible joint.
[0004] In addition, during use, the connection between the flange and the expansion tube is usually subjected to more bending and vibration together with the expansion tube, which may cause fatigue fracture of the metal flexible joint at the connection, causing damage to the equipment and posing a safety hazard. Utility Model Content
[0005] In order to solve the problems existing in the prior art, the utility model provides a protective flexible joint, which can extend the service life of the metal flexible joint and avoid potential safety hazards.
[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a protective flexible joint, comprising a wear-resistant hose and a double flange joint, wherein the double flange joint comprises two flanges, a telescopic tube is connected between the two flanges, and a support tube is installed on the two flanges, one end of the support tube is provided with a baffle, the baffle abuts against the end of the flange that is not connected to the telescopic tube, and the other end of the support tube passes through the flange and abuts against the inner wall of the telescopic tube;
[0007] One end of the wear-resistant hose is provided with an annular retaining edge that abuts against the retaining plate, and the other end of the wear-resistant hose extends out from the inside of the flange (2) away from the annular retaining edge;
[0008] One end of the double flange joint is connected with a mounting plate matched with the flange, and the annular retaining edge and the retaining sheet close to the annular retaining edge are both located between the mounting plate and the flange.
[0009] Preferably, both ends of the telescopic tube are provided with connecting sections, and the telescopic tube is connected to the flange through the connecting sections.
[0010] Preferably, the length of the support tube is slightly greater than the overlapping length of the flange and the connecting section.
[0011] Preferably, the support tube, the telescopic tube and the flange are interference fit.
[0012] Preferably, an arc chamfer is provided at the connection between the support tube and the baffle.
[0013] Preferably, the inner wall of the support tube is a smooth surface, and the outer wall of the support tube is a rough surface.
[0014] Preferably, the outer diameter of the wear-resistant hose is smaller than the inner diameter of the support tube.
[0015] Preferably, the wear-resistant hose and the annular retaining edge are connected in an integral manner.
[0016] Preferably, the wear-resistant hose and the annular retaining edge are both made of corrosion-resistant flexible materials.
[0017] Preferably, the mounting plate and the flange plate are connected by bolts.
[0018] The beneficial effects of the utility model are as follows:
[0019] 1. The utility model installs a wear-resistant hose inside the double flange joint so that the fluid does not contact the telescopic tube during flow, and does not cause wear and damage to the inner wall of the telescopic tube. The end of the wear-resistant hose for liquid inlet is fixed, and the end for liquid outlet is not fixed. This can also effectively reduce the damage to the wear-resistant hose caused by vibration, bending, and displacement of the telescopic tube, extend its service life, and has a simple structure for easy production.
[0020] 2. An annular retaining edge is arranged at one end of the wear-resistant hose of the utility model, which is clamped between the flange and the mounting plate, and plays the role of fixing the wear-resistant hose. At the same time, it can also replace the sealing ring to ensure the sealing of the connection, facilitate disassembly and replacement, and reduce maintenance costs.
[0021] 3. The utility model inserts a support tube into the connection between the flange and the telescopic tube. The support tube has an interference fit with the flange and the connecting section and is tightly pressed against the inner walls of both, which can limit the relative movement between the connecting section and the flange and effectively reduce the force at the connection between the telescopic tube and the flange. The smooth inner wall of the support tube can also reduce the wear of the wear-resistant hose during installation or operation and extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a cross-sectional view of a protective flexible joint of the utility model;
[0023] Figure 2 It is a side view of a protective flexible joint of the utility model.
[0024] In the figure: 1-mounting plate, 2-flange plate, 3-telescopic tube, 4-support tube, 5-blocking plate, 6-arc chamfer, 7-wear-resistant hose, 8-annular retaining edge, 9-connecting section. DETAILED DESCRIPTION
[0025] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.
[0026] like Figure 1-2 A protective flexible joint shown includes a wear-resistant hose 7 and a double flange joint. The double flange joint includes two flange plates 2. A telescopic tube 3 is connected between the two flange plates 2. The telescopic tube 3 can be deformed arbitrarily to meet installation requirements.
[0027] The utility model is provided with a support tube 4 on both flanges 2. A baffle 5 is provided at one end of the support tube 4. The baffle 5 abuts against the end of the flange 2 not connected to the telescopic tube 3. The other end of the support tube 4 passes through the flange 2 and abuts against the inner wall of the telescopic tube 3.
[0028] Specifically, during installation, the end of the support tube 4 without the baffle 5 is passed through the flange 2 and inserted into the telescopic tube 3. The baffle 5 at the end can limit the installation of the support tube 4, and it is also convenient to pull the support tube 4 out of the flange 2 during disassembly and replacement. After the support tube 4 is fixed, the wear-resistant hose 7 is inserted into the double flange joint. During the insertion process, the wear-resistant hose 7 will pass through the two support tubes 4 in sequence.
[0029] Both ends of the telescopic tube 3 of the utility model are provided with connecting sections 9, and the telescopic tube 3 is connected to the flange 2 through the connecting sections 9. The length of the support tube 4 is slightly larger than the superimposed length of the flange 2 and the connecting section 9. The support tube 4 has an interference fit with the telescopic tube 3 and the flange 2. The outer wall of the support tube 4 is tightly against the connecting section 9 and the flange 2, which can limit the relative movement between the connecting section 9 and the flange 2, effectively reduce the stress at the connection between the telescopic tube 3 and the flange 2, and extend its service life.
[0030] Specifically, the outer wall of the support tube 4 is a rough surface, which increases the friction with the flange 2 and the inner wall of the connecting section 9 to prevent the support tube 4 from falling out of the flange 2;
[0031] One end of the wear-resistant hose 7 of the utility model is provided with an annular retaining edge 8 against the retaining plate 5, which plays a role in limiting the installation of the wear-resistant hose 7. The outer diameter of the wear-resistant hose 7 is smaller than the inner diameter of the support tube 4. During installation, the wear-resistant hose 7 passes through the two support tubes 4 in sequence, and finally the end away from the annular retaining edge 8 extends out from the inside of the double flange joint;
[0032] Specifically, the wear-resistant hose 7 is fixed on the end of the double flange joint where liquid enters, and the end of the wear-resistant hose 7 that is not fixed extends from the end of the double flange joint where liquid exits. The wear-resistant hose 7 can move freely with the displacement of the telescopic tube 3 sleeved on the outside thereof. When the telescopic tube 3 is vibrated or bent by external force, the wear-resistant hose 7 will not be stretched or compressed by external force. Therefore, the working environment of the double flange joint will not have much impact on the service life of the wear-resistant hose.
[0033] In addition, the fluid enters the double flange joint from one end of the wear-resistant hose 7 where the annular retaining edge 8 is provided, and finally flows out from the other end of the wear-resistant hose 7. The fluid never contacts the flange 2 and the telescopic tube 3, thereby effectively avoiding corrosion and wear of the telescopic tube 3 by the fluid and extending the service life of the telescopic tube 3.
[0034] The inner wall of the support tube 4 of the utility model is a smooth surface, and the connection between the support tube 4 and the baffle 5 is provided with an arc chamfer 6. During installation or normal use, the contact surface between the support tube 4 and the wear-resistant hose 7 can minimize the mutual friction with the wear-resistant hose 7.
[0035] Specifically, one end of the double flange joint is connected to a mounting plate 1 matched with the flange 2, the mounting plate 1 and the flange 2 are connected by bolts, the annular retaining edge 8 and the retaining piece 5 close to the annular retaining edge 8 are both located between the mounting plate 1 and the flange 2, the annular retaining edge 8 and the retaining piece 5 are sandwiched in the middle, and play the role of fixing the wear-resistant hose 7 and the support tube 4;
[0036] The wear-resistant hose 7 of the utility model is made of corrosion-resistant flexible material, which can prevent the wear-resistant hose 7 from being corroded by the fluid. The flexible material can also prevent the wear-resistant hose 7 from colliding with the telescopic tube 3, thereby extending its service life.
[0037] Specifically, the annular retaining edge 8 is also made of flexible material. The annular retaining edge 8 is against the side of the mounting plate 1 close to the flange plate 2, which can fix the wear-resistant hose 7. At the same time, it can also replace the sealing ring to seal and prevent leakage of the connection between the mounting plate 1 and the flange plate 2.
[0038] The wear-resistant hose 7 and the annular retaining edge 8 of the utility model are connected in an integrated manner, which makes the connection between the two more reliable.
[0039] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.
Claims
1. A protective flexible joint, characterized in that: It comprises a wear-resistant hose (7) and a double flange joint, wherein the double flange joint comprises two flanges (2), a telescopic tube (3) is connected between the two flanges (2), a support tube (4) is installed on the two flanges (2), a baffle (5) is provided at one end of the support tube (4), the baffle (5) abuts against the end of the flange (2) not connected to the telescopic tube (3), and the other end of the support tube (4) passes through the flange (2) and abuts against the inner wall of the telescopic tube (3); One end of the wear-resistant hose (7) is provided with an annular retaining edge (8) abutting against the retaining plate (5), and the other end of the wear-resistant hose (7) extends out from the inside of the flange (2) away from the annular retaining edge; One end of the double flange joint is connected to a mounting plate (1) that matches the flange (2), and the annular retaining edge (8) and the retaining plate (5) close to the annular retaining edge (8) are both located between the mounting plate (1) and the flange (2).
2. A protective flexible joint according to claim 1, characterized in that: Both ends of the telescopic tube (3) are provided with connecting sections (9), and the telescopic tube (3) is connected to the flange (2) via the connecting sections (9).
3. A protective flexible joint according to claim 2, characterized in that: The length of the support tube (4) is slightly greater than the superimposed length of the flange (2) and the connecting section (9).
4. A protective flexible joint according to claim 1, characterized in that: The support tube (4) is interference fit with the telescopic tube (3) and the flange (2).
5. A protective flexible joint according to claim 1, characterized in that: An arc chamfer (6) is provided at the connection between the support tube (4) and the baffle (5).
6. A protective flexible joint according to claim 1, characterized in that: The inner wall of the support tube (4) is a smooth surface, and the outer wall of the support tube (4) is a rough surface.
7. A protective flexible joint according to claim 1, characterized in that: The wear-resistant hose (7) and the annular retaining edge (8) are connected in an integrally formed manner.
8. The protective flexible joint according to claim 1, characterized in that: The outer diameter of the wear-resistant hose (7) is smaller than the inner diameter of the support tube (4).
9. The protective flexible joint according to claim 1, characterized in that: The wear-resistant hose (7) and the annular retaining edge (8) are both made of corrosion-resistant flexible materials.
10. The protective flexible joint according to claim 1, characterized in that: The mounting plate (1) and the flange plate (2) are connected via bolts.