A connection sealing device for a hose and pipe

Abstract

The utility model provides a kind of connecting sealing device of soft and hard pipe, including hard pipe and hose, the connecting end of the hose is set on the outside of the connecting end of the hard pipe with interference;It is annular to have the elastic connecting piece, the connecting piece is set on the radial outside of the hard pipe, one end of the connecting piece and the outside of the hard pipe are sealingly fixed connection, and the radial inside of the connecting piece and the radial outside of the hard pipe between reservation installation area.This connecting sealing device of soft and hard pipe, by setting the hose on the outside of the hard pipe, the interference fit of the inner wall of hose and the outer wall of hard pipe, form first-level sealing, by setting filler between connecting piece and hose, filler can be expanded to fill the micro gap under pressure, form secondary sealing, when negative pressure starts, the pressure difference in system promotes hose and connecting piece closely, form dynamic third-level sealing, wherein the elastic connecting piece can solve the stress concentration problem between soft and hard pipe.

Description

Technical Field

[0001] This utility model relates to the field of flexible and rigid pipe connection technology, and in particular to a connection and sealing device for flexible and rigid pipes. Background Technology

[0002] In high negative pressure environments such as industrial ventilation, chemical production, and laboratories, the reliability and sealing of the exhaust system are crucial. Traditional connections between flexible and rigid pipes are often secured with flange bolts or clamps.

[0003] However, the existing flexible hose and rigid pipe connection methods described above have the following shortcomings in application:

[0004] Uneven bolt preload or aging of sealing material can easily lead to air leakage. High negative pressure can easily cause gaps, resulting in decreased system efficiency. In addition, rigid flanges are difficult to compensate for vibration or thermal expansion and contraction differences between flexible hoses and rigid pipes, which can easily cause stress concentration.

[0005] Therefore, in order to solve the above problems, this utility model proposes a connection sealing device for flexible and rigid pipes that can improve the sealing effect and avoid stress concentration between the flexible pipe and the rigid pipe. Utility Model Content

[0006] To address the technical problems existing in the current connection methods between flexible and rigid pipes, this utility model provides a sealing device for the connection between flexible and rigid pipes.

[0007] According to one objective of this utility model, this utility model provides a connection and sealing device for rigid and flexible pipes, including a rigid pipe and a flexible pipe, wherein the connection end of the flexible pipe is interference-fitted onto the outside of the connection end of the rigid pipe.

[0008] A ring-shaped, elastic connector is fitted onto the radially outer side of the rigid tube. One end of the connector is sealed and fixedly connected to the outer side of the rigid tube. An installation area is reserved between the radially inner side of the connector and the radially outer side of the rigid tube. The other end of the connector and the connecting end of the rigid tube form an opening communicating with the inside and outside of the installation area. The connecting end of the flexible tube is configured to be placed in the installation area through the opening. A microscopic gap is formed between the installation area and the flexible tube. The radial dimension of the inner side of the connector is adjustable.

[0009] A filler is disposed inside the connector and is configured to expand under pressure to fill the microscopic gap.

[0010] Preferably, a stainless steel reinforcing ring is provided inside the connection end of the hose.

[0011] Preferably, a clamping assembly is provided on the outer side of the connector, the clamping assembly comprising:

[0012] A steel strip is wound around the radial outer side of the connector, and positioning holes are provided on the steel strip and are arranged at intervals along the length of the steel strip.

[0013] An adjusting body is provided, one end of the steel strip is fixedly connected to the adjusting body, and a through hole is provided on the adjusting body along the circumference of the connector, through which the other end of the steel strip passes;

[0014] An adjustment handle is movably connected to the adjustment body, and the end of the adjustment handle corresponds to the positioning hole on the steel strip.

[0015] Preferably, a self-locking buckle is provided between the adjustment body and the positioning hole.

[0016] Preferably, the connector includes a first connecting portion and a second connecting portion connected sequentially along the axial direction. The end of the first connecting portion away from the second connecting portion corresponds to the connecting end of the rigid tube. The radial dimension of the first connecting portion is equal at any point along the axial direction, and the radial dimension of the second connecting portion gradually increases away from the first connecting portion.

[0017] Preferably, a corrugated elastic steel sheet is provided between the radially inner side of the flexible hose connection end and the radially outer side of the rigid pipe connection end.

[0018] Preferably, the inner side of the connecting end of the flexible tube and the connecting end of the rigid tube are fitted with matching magnetic elements.

[0019] Preferably, matching threaded grooves are provided between the radially inner side of the hose connection end and the radially outer side of the rigid pipe connection end, and between the radially outer side of the hose connection end and the radially inner side of the connector.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This flexible-rigid tube connection sealing device forms a primary seal by sleeve of the flexible tube over the outer wall of the rigid tube, with the inner wall of the flexible tube and the outer wall of the rigid tube being pressurized together. A secondary seal is formed by placing a filler between the connector and the flexible tube, which can expand under pressure to fill the microscopic gaps. When starting under negative pressure, the pressure difference in the system pushes the flexible tube and the connector to fit tightly together, forming a dynamic tertiary seal. The elastic connector can solve the stress concentration problem between the flexible and rigid tubes.

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram from one perspective of the connection and sealing device for flexible and rigid tubes described in this utility model;

[0024] Figure 2 This is a schematic diagram from another perspective of the connection and sealing device for soft and hard tubes described in this utility model. Detailed Implementation

[0025] The following description is intended to provide a detailed account of the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0026] Please see Figure 1-2 This utility model provides a technical solution: a connection and sealing device for flexible and rigid pipes, comprising:

[0027] A rigid tube 100 and a flexible tube 200, wherein the connecting end of the flexible tube 200 is interference-fitted to the outside of the connecting end of the rigid tube 100;

[0028] A ring-shaped, elastic connector 300 is sleeved on the radially outer side of the rigid tube 100. One end of the connector 300 is sealed and fixedly connected to the outer side of the rigid tube 100. An installation area is reserved between the radially inner side of the connector 300 and the radially outer side of the rigid tube 100. The other end of the connector 300 and the connecting end of the rigid tube 100 form an opening communicating with the inside and outside of the installation area. The connecting end of the flexible tube 200 is configured to be placed in the installation area through the opening. A microscopic gap is formed between the installation area and the flexible tube 200. The radial dimension of the inner side of the connector 300 is adjustable.

[0029] A filler 400 is disposed inside the connector 300 and is configured to expand under pressure to fill the micro gaps.

[0030] By sleeved hose 200 on the outside of rigid pipe 100, and with the inner wall of hose 200 and the outer wall of rigid pipe 100 interference fit, a primary seal is formed. By placing filler 400 between connector 300 and hose 200, filler 400 can expand under pressure to fill the micro gaps, forming a secondary seal. When negative pressure is activated, the pressure difference in the system pushes hose 200 and connector 300 to fit tightly together, forming a dynamic tertiary seal. The elastic connector 300 can solve the stress concentration problem between the flexible and rigid pipes 100.

[0031] See Figure 1 and 2In this embodiment, a clamping assembly 600 is provided on the outer side of the connector 300, and the clamping assembly 600 includes:

[0032] A steel strip 601 is wound around the radial outer side of the connector 300. The steel strip 601 has positioning holes 6011, which are spaced apart along the length of the steel strip 601.

[0033] An adjusting body 602 is provided, one end of the steel strip 601 is fixedly connected to the adjusting body 602, and a through hole is provided on the adjusting body 602 along the circumference of the connecting member 300, and the other end of the steel strip 601 passes through the through hole;

[0034] An adjustment handle 603 is movably connected to the adjustment body 602, and the end of the adjustment handle 603 corresponds to the positioning hole 6011 on the steel strip 601.

[0035] Specifically, the connector 300 is a connector 300 made of elastic steel sheet, the positioning holes 6011 are arranged at intervals along the length of the steel strip 601, and the adjusting handle 603 and the adjusting body 602 are connected by threads.

[0036] Compared to the complex and multi-step installation process of traditional flange connections, such as aligning bolt holes, tightening bolts, and filling sealant, which is time-consuming and labor-intensive, this flexible and rigid pipe connection sealing device only requires axial pushing and adjusting the adjusting handle 603 to complete the sealing connection. Specifically, by axially pushing, the connection end of the flexible hose 200 is pushed into the installation area to achieve the connection between the flexible hose 200 and the rigid pipe 100. The elastic connector 300 has a clamping component 600 on its radially outer side, which is tightened by pulling the end of the steel strip 601. The steel strip 601 slides within the through hole of the adjusting body 602, thereby adjusting the inner diameter of the steel strip 601. This allows the radial dimension of the inner side of the connector 300 to be adjusted via the steel strip 601, bringing the connector 300 to a suitable radial dimension. Further operation of the adjusting handle 603 aligns the adjusting handle 603 with the positioning hole 6011 on the steel strip 601, thus fixing the radial dimensions of the steel strip 601 and the connector 300. This enhances adaptability, enabling connections between flexible and rigid pipes 100 of different diameters and reducing maintenance costs.

[0037] The connector 300 includes a first connecting portion 301 and a second connecting portion 302 connected sequentially along the axial direction. The end of the first connecting portion 301 facing away from the second connecting portion 302 corresponds to the connecting end of the rigid tube 100. The first connecting portion 301 has a uniform radial dimension at any point along the axial direction, while the radial dimension of the second connecting portion 302 gradually increases away from the first connecting portion 301. (See also...) Figure 1The connector 300 is generally inverted conical in shape, and the shape of the installation area corresponds to the shape of the connector 300. In use, the inverted conical connector 300 can cooperate with the filler 400 to improve the sealing effect on the assembly gap.

[0038] Furthermore, a self-locking buckle is provided between the adjustment body 602 and the positioning hole 6011 to achieve tool-free installation under high negative pressure.

[0039] Furthermore, a stainless steel reinforcing ring 500 is provided inside the connection end of the hose 200 to increase the stability of the connection between the hose 200 and the rigid pipe 100 when the connection end of the hose 200 is placed in the installation area.

[0040] Furthermore, a buffer layer is provided between the radially inner side of the connecting end of the flexible hose 200 and the radially outer side of the connecting end of the rigid pipe 100. In this embodiment, the buffer layer is a corrugated elastic steel sheet 700, which can absorb vibration and thermal deformation stress and play a buffering role in the connection between the flexible and rigid pipes 100.

[0041] Furthermore, matching magnetic attractors are embedded in the inner side of the connecting end of the flexible hose 200 and the connecting end of the rigid tube 100. In this embodiment, the magnetic attractor in the connecting end of the rigid tube 100 is a permanent magnet, and the magnetic attractor in the connecting end of the flexible hose 200 is a magnetically conductive material. The magnetic force of the magnetic attractor assists in sealing. It should be noted that the magnetic attractor is expensive, and the magnetic field may interfere with the equipment.

[0042] Furthermore, matching threaded grooves are provided between the radially inner side of the connecting end of the hose 200 and the radially outer side of the connecting end of the rigid pipe 100, as well as between the radially outer side of the connecting end of the hose 200 and the radially inner side of the connector 300. During assembly, the connecting end of the hose 200 can be sealed and installed in the installation area by rotation. However, due to the need for rotation, it may be inconvenient when space is limited.

[0043] In summary, this flexible and rigid pipe connection and sealing device is easy to install, and the connection can be completed simply by pushing and adjusting the handle 603. Compared with flange connection, it takes less time. It adopts a multi-stage sealing synergy, and the calculated air leakage rate is <0.1% under a negative pressure of 10kPa. The connector 300 is made of elastic steel sheet to buffer vibration, which improves the aging resistance of the rubber sleeve at the connection end of the hose 200 by more than 3 times. The connector 300 can be adjusted to the appropriate size according to different pipe diameters through the clamping component 600, which improves the versatility of the device. Repair can be completed by replacing the filler 400 locally without the need for overall disassembly, resulting in low maintenance costs.

[0044] The embodiments described above are only used to illustrate the technical ideas and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. The scope of patent application of this utility model should not be limited by these embodiments. That is, any equivalent changes or modifications made in accordance with the spirit disclosed in this utility model still fall within the patent scope of this utility model.

Claims

1. A sealing device for connecting rigid and flexible pipes, characterized in that, include: A rigid tube (100) and a flexible tube (200), wherein the connecting end of the flexible tube (200) is interference-fitted to the outside of the connecting end of the rigid tube (100); A ring-shaped, elastic connector (300) is sleeved on the radially outer side of the rigid tube (100). One end of the connector (300) is sealed and fixedly connected to the outer side of the rigid tube (100). An installation area is reserved between the radially inner side of the connector (300) and the radially outer side of the rigid tube (100). The other end of the connector (300) and the connecting end of the rigid tube (100) form an opening that connects the inside and outside of the installation area. The connecting end of the flexible tube (200) is configured to be placed in the installation area through the opening. A microscopic gap is formed between the installation area and the flexible tube (200). The radial dimension of the inner side of the connector (300) is adjustable. A filler (400) is disposed inside the connector (300) and is configured to expand under pressure to fill the micro gap.

2. The connection and sealing device for flexible and rigid pipes according to claim 1, characterized in that, The connection end of the hose (200) is provided with a stainless steel reinforcing ring (500).

3. The connection and sealing device for flexible and rigid pipes according to claim 1, characterized in that, A clamping assembly (600) is provided on the outer side of the connector (300), the clamping assembly (600) comprising: A steel strip (601) is wound around the radial outer side of the connector (300), and a positioning hole (6011) is provided on the steel strip (601), the positioning hole (6011) being arranged at intervals along the length direction of the steel strip (601). An adjusting body (602) is provided, one end of the steel strip (601) is fixedly connected to the adjusting body (602), and a through hole is provided on the adjusting body (602) along the circumference of the connector (300), and the other end of the steel strip (601) passes through the through hole; An adjustment handle (603) is movably connected to the adjustment body (602), and the end of the adjustment handle (603) corresponds to the positioning hole (6011) on the steel strip (601).

4. The connection and sealing device for flexible and rigid pipes according to claim 3, characterized in that, A self-locking buckle is provided between the adjustment body (602) and the positioning hole (6011).

5. The connection and sealing device for flexible and rigid pipes according to claim 1, characterized in that, The connector (300) includes a first connecting part (301) and a second connecting part (302) connected sequentially along the axial direction. The end of the first connecting part (301) away from the second connecting part (302) corresponds to the connecting end of the rigid tube (100). The first connecting part (301) has the same radial dimension at any point along the axial direction, and the radial dimension of the second connecting part (302) gradually increases away from the first connecting part (301).

6. The connection and sealing device for flexible and rigid pipes according to claim 1, characterized in that, A corrugated elastic steel sheet (700) is provided between the radially inner side of the connection end of the flexible tube (200) and the radially outer side of the connection end of the rigid tube (100).

7. A connection and sealing device for flexible and rigid pipes according to claim 1, characterized in that, The inner side of the connecting end of the flexible tube (200) and the connecting end of the rigid tube (100) are fitted with matching magnetic elements.

8. A connection and sealing device for flexible and rigid pipes according to claim 1, characterized in that, Matching threaded grooves are provided between the radially inner side of the hose (200) connection end and the radially outer side of the rigid pipe (100) connection end, and between the radially outer side of the hose (200) connection end and the radially inner side of the connector (300).

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