Air hose anti-leak structure in a pneumatic control system

Abstract

The utility model discloses a hose air leakage prevention structure in pneumatic control system, including casing, tripping, reducing sleeve, sealing washer and chucking mechanism, reducing sleeve includes fixed section and reducing section, and the long strip hole for the hose passing through has in reducing section, and reducing sleeve is fixed with casing through its fixed section and covers tripping, and the long strip hole in reducing section is aligned with the hole of tripping, the hose is inserted and fixed and then extends straight from tripping to reducing section, and from reducing section, the outer wall of hose is tightly combined with the outer wall of tripping and the outer wall of reducing section. The utility model discloses setting up reducing sleeve to lead out flexible air pipe, after the air pipe is connected to the joint, through the guide of extension section, make the curved position of air pipe shift, thereby avoid bending at tripping, guarantee the stress of air pipe and sealing washer in radial always keep uniform, solved the air leakage problem that air pipe is in tripping and produces air leakage gap because of bending.

Description

Technical Field

[0001] This utility model relates to the field of air leakage prevention technology, and in particular to an air leakage prevention structure for hoses mainly used in pneumatic control systems. Background Technology

[0002] Pneumatic transmission systems mainly consist of an air source, actuators, control and adjustment elements, and auxiliary components, and are widely used in industries such as electrolytic aluminum. However, traditional pneumatic systems suffer from numerous air leaks during application due to bends in the air hoses (such as PU hoses) at the joints. This leads to a high PU hose replacement rate and significant compressed air consumption at the PU hose joints, ultimately resulting in a substantial increase in AC power consumption. Furthermore, frequent leaks at the joints can cause pressure loss in the pneumatic control system, leading to instability. Multiple observations at the application site revealed that the main leakage points are concentrated at the PU hose joints. A schematic diagram of the PU hose joint is shown below. Figure 1 As shown, the PU pipe connector mainly consists of a shell 1, a release mechanism 2, a snap ring 5, a snap 4, and a sealing ring 6.

[0003] The working principle of the PU tube connector is as follows: When the PU tube 7 is inserted into the connector, the PU tube 7 first pushes open the retaining spring 5 and moves inward to reach the sealing ring 6. The diameter of the sealing ring 6 is smaller than the diameter of the PU tube 7. Under the force of manually pushing the PU tube 7, the sealing ring 6 expands and deforms outward. The deformed sealing ring 6 is in close contact with the outer wall of the PU tube 7, and there is compressed air inside. The pressure of the compressed air acts on the outer wall of the sealing ring 6, making the contact between the sealing ring 6 and the PU tube 7 even tighter, thus achieving a sealing effect. The retaining spring 5 inside prevents the PU tube 7 from falling off. However, this connector has very high requirements for the connection of the PU tube 7. The PU tube 7 must be installed vertically without bending to achieve a sealing effect. If the PU tube 7 bends at the release point 2, the elastic force generated by the bending will pull the PU tube 7 inside the connector, causing the PU tube 7 to change from vertical to twisted. The radial pressure between the sealing ring 6 and the PU tube 7 is uneven, causing a gap 8 to appear on the bent back of the PU tube 7, resulting in air leakage. Although many leak-proof solutions have been designed, existing solutions are usually quite complex, especially when dealing with leaks caused by hose bending, which require the coordination of multiple parts. Summary of the Invention

[0004] This utility model addresses the shortcomings of existing technologies by providing a leak-proof hose structure for pneumatic control systems that is simple in structure, more rationally designed, has good wear resistance, and a longer service life.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a hose leak-proof structure in a pneumatic control system, including a housing, a trip unit, a sealing ring, and a clamping mechanism. The sealing ring and clamping mechanism are installed inside the housing for sealing and clamping the hose. A part of the trip unit is installed inside the housing to block the clamping mechanism and the sealing ring, and another part extends out of the housing for inserting the hose. It also includes a reducing sleeve, which includes a fixed section and a reducing section. The reducing section has an elongated hole for the hose to pass through. The reducing sleeve is connected and fixed to the housing through its fixed section to cover the trip unit. The elongated hole in the reducing section is aligned with the hole of the trip unit. After the hose is inserted and fixed, it extends straight from the trip unit into the reducing section and is led outward from the reducing section. The outer wall of the hose is tightly fitted with the outer wall of the trip unit and the outer wall of the reducing section.

[0006] Furthermore, the cross-section of the variable diameter sleeve is a "convex" shaped structure, with the thicker tail section being the fixed section and the thinner front section being the extension section. The extension section and the fixed section are an integral structure made of rigid material.

[0007] Furthermore, an internal thread section is provided on the inner wall of the fixed section of the reducing sleeve, and an external thread section is provided on the outer wall of the shell. The reducing sleeve is assembled and fixed with the shell by screwing the internal thread section and the external thread section together.

[0008] Furthermore, the reducing sleeve is made of stainless steel to avoid the influence of the magnetic field in the metal smelting workshop.

[0009] Furthermore, the locking mechanism includes a buckle and a snap ring, the buckle and snap ring are installed in the housing through the buckle, and the sealing ring is pressed into the housing by the buckle.

[0010] Furthermore, the extension section is longer than the fixed section so as to accommodate a longer hose.

[0011] This invention uses a variable diameter sleeve to extend a flexible air tube (hose). After the air tube is connected to the connector, the extension section guides the bending part of the air tube upward, thereby avoiding bending at the disengagement point and ensuring that the radial force on the air tube and the sealing ring remains uniform. This solves the problem of air leakage caused by the air tube bending at the disengagement point. Attached Figure Description

[0012] Figure 1 This is a cross-sectional structural diagram of the prior art;

[0013] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0014] Figure 3 This is a cross-sectional schematic diagram of the disassembled state of this utility model.

[0015] In the diagram, 1 is the housing, 11 is the external thread section, 2 is the release, 3 is the reducing sleeve, 31 is the fixed section, 32 is the extension section, 33 is the internal thread section, 4 is the snap fastener, 5 is the snap ring, 6 is the sealing ring, 7 is the hose, and 8 is the air leakage gap. Detailed Implementation

[0016] In this embodiment, refer to Figure 1-3 The air leak-proof structure of the hose in the pneumatic control system includes a housing 1, a release 2, a reducing sleeve 3, a sealing ring 6, and a clamping mechanism. The sealing ring 6 and the clamping mechanism are installed inside the housing 1 to seal and clamp the hose 7 (e.g., a PU tube). A part of the release 2 is inserted into the housing 1 to block the clamping mechanism and the sealing ring 6, and the other part extends out of the housing 1 to insert the hose 7. The reducing sleeve 3 includes a fixed section 31 and a reducing section 32. The reducing section 32 has an elongated hole (cylindrical hole) for the hose 7 to pass through. The reducing sleeve 3 is connected and fixed to the housing 1 through its fixed section 31 to cover the release 2. The elongated hole in the reducing section 32 is aligned with the hole of the release 2. After the hose 7 is inserted and fixed, it extends straight from the release 2 into the reducing section 32 and is led out from the reducing section 32. This can prevent the hose 7 from bending in the release 7 and creating gaps 8. The outer wall of the hose 7 fits tightly against the outer wall of the trip 2 and the outer wall of the reducing section 32. When the hose 7 bends, a gap 8 will only appear near the outer end of the reducing section 32, thus preventing air leakage.

[0017] The cross-section of the variable diameter sleeve 3 is a "convex" shaped structure, with the thicker tail section being the fixed section 31 and the thinner front section being the extension section 32. The extension section 32 and the fixed section 31 are an integral structure made of hard material.

[0018] An internal thread section 33 is provided on the inner wall of the fixed section 31 of the reducing sleeve 3, and an external thread section 11 is provided on the outer wall of the housing 1. The reducing sleeve 3 is assembled and fixed to the housing 1 by screwing the internal thread section 33 and the external thread section 11 together. Of course, the positions of the internal and external threads can be interchanged, or a rotation-locking structure can be used to fix the reducing sleeve 3 to the housing 1.

[0019] The reducing sleeve 3 is made of stainless steel. The welding parts of the reducing sleeve 3 are required to be fully welded. The welding rod is also made of stainless steel to ensure the strength of the material and to avoid the influence of the magnetic field in the metal smelting workshop.

[0020] The clamping mechanism includes a buckle 4 and a retaining spring 5. The release 2 and the retaining spring 5 are installed in the housing 1 through the buckle 4, and the sealing ring 6 is pressed into the housing 1 by the buckle 4.

[0021] The length of the extension section 32 is greater than the length of the fixed section 31, so that it can cover a longer hose 7 and achieve better stability.

[0022] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A leak-proof hose structure in a pneumatic control system, comprising a housing, a release mechanism, a sealing ring, and a clamping mechanism, wherein the sealing ring and clamping mechanism are installed inside the housing for sealing and clamping the hose, a portion of the release mechanism is inserted inside the housing to block the clamping mechanism and the sealing ring, and another portion extends outside the housing for inserting the hose, characterized in that: It further includes a reducing sleeve, which includes a fixed section and a reducing section. The reducing section has a long strip hole for the hose to pass through. The reducing sleeve is connected and fixed to the housing through its fixed section to cover the release buckle. The long strip hole in the reducing section is aligned with the hole of the release buckle. After the hose is inserted and fixed, it extends straight from the release buckle into the reducing section and is led out from the reducing section. The outer wall of the hose is closely fitted with the outer wall of the release buckle and the outer wall of the reducing section.

2. The leak-proof hose structure in the pneumatic control system according to claim 1, characterized in that: The cross-section of the reducing sleeve is a "convex" shaped structure. Its thick tail section is the fixed section, and its thin front section is the extension section. The extension section and the fixed section are an integral structure made of hard material.

3. The leak-proof hose structure in the pneumatic control system according to claim 1, characterized in that: An internal thread section is provided on the inner wall of the fixed section of the reducing sleeve, and an external thread section is provided on the outer wall of the housing. The reducing sleeve is assembled and fixed to the housing by screwing the internal thread section and the external thread section.

4. The leak-proof hose structure in the pneumatic control system according to any one of claims 1-3, characterized in that: The reducing sleeve is made of stainless steel material.

5. The air leakage prevention structure for the flexible hose in the pneumatic control system according to claim 1, characterized in that: The clamping mechanism includes a buckle and a snap ring. The release buckle and the snap ring are installed in the housing through the buckle. The sealing ring is pressed inside the housing by the buckle.

6. The leak-proof hose structure in the pneumatic control system according to claim 2, characterized in that: The length of the extension section is greater than the length of the fixed section.

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