Sealing structure of high-ring-stiffness composite pipe

Abstract

The utility model relates to the related technical field of pipeline sealing, and discloses a sealing structure of a high-ring-stiffness composite pipe, which is characterized in that a lining plug is matched with an inner side pressure sealing tile, so that when a thread sealing cap is tightened, a locking push rod pushes a lifting pipe, and an elastic pressure rod rotates around a second connecting shaft; the elastic pressure rod is compressed and then extends, the lining plug is pressed by the pressure sealing tile through the pressure of the elastic pressure rod, the lining plug is opened through the pressure of the pressure sealing tile, a gap between the lining plug and the composite pipe is sealed in a pressurized mode, and the sealing performance is better than that of a traditional sealing mode. After the thread sealing cap is screwed down, the elastic pressure rod rotates around the second connecting shaft, so that the self-locking effect can be achieved through the pressure of the elastic pressure rod, friction force increased by the pressure of the elastic pressure rod needs to be overcome when the lining plug needs to be pulled out, and the sealing effect of the lining plug cannot be affected even if the thread sealing cap is loosened.

Description

Technical Field

[0001] The utility model relates to the technical field related to pipeline sealing, in particular to a sealing structure of a high-ring-rigidity composite pipe. Background Art

[0002] Composite pipes are usually made of a stacked combination of two or more different materials and are often used in chemical, marine, sewage treatment and other fields. The pipe openings are usually sealed with plugs or threads to prevent liquids, gases or solid substances from leaking or overflowing from the pipes.

[0003] Traditional composite pipe opening sealing methods, including plugs, threads and other sealing methods, are sealed by rotational pre-tightening, resulting in a low ring stiffness angle at the seal. When the pipeline or the seal is subjected to rotational force, it is easy to cause the seal to decrease, resulting in leakage. Utility Model Content

[0004] The utility model aims to provide a sealing structure of a composite pipe with high ring stiffness. The device is used to work, thereby solving the problem of low ring stiffness angle at the sealing part of the traditional composite pipe opening sealing method.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sealing structure for a high-ring-rigidity composite pipe, comprising a composite pipe, a lining plug inserted into the opening of the composite pipe, an elastic threaded sleeve sleeved on the outer side of the composite pipe opening, the elastic threaded sleeve being threadedly connected to a threaded sealing cap, a lifting tube being arranged in the lining plug, the lifting tube being connected to an elastic pressure rod via a first connecting shaft, the other end of the elastic pressure rod being connected to a pressure sealing tile via a second connecting shaft, the pressure sealing tile pressing the lining plug against the inner wall of the composite pipe from the inside, a locking push rod fixedly connected to the threaded sealing cap, the end of the locking push rod being fixedly connected to a limiting slider, and the limiting slider slides in the lifting tube.

[0006] Furthermore, the lining plug is made of elastic silicone material.

[0007] Furthermore, an annular sealing strip is arranged on the outside of the liner plug, and the annular sealing strips are provided in multiple groups and are arranged at equal intervals on the outer surface of the liner plug.

[0008] Furthermore, the elastic threaded sleeve is made of metal, and four deformation grooves are arranged around the elastic threaded sleeve.

[0009] Furthermore, the outer side of the threaded sealing cap is processed with anti-slip grooves.

[0010] Furthermore, the elastic pressure rod comprises a telescopic tube, a pressure spring is arranged inside the telescopic tube, and a telescopic rod is arranged outside the pressure spring.

[0011] Furthermore, the first connecting shaft, the elastic pressure rod, the second connecting shaft and the pressure sealing shoe are arranged in six groups, and each three groups in the six groups form a layer, and two layers are arranged in total, and the two layers are staggered with an angle of 60 degrees.

[0012] Furthermore, an annular convex strip is processed on the inner wall of the lining plug, and an arc-shaped groove is processed on the outer side of the pressure sealing shoe, and the annular convex strip and the arc-shaped groove are embedded in each other.

[0013] Furthermore, a plurality of sets of rotation stop pins are arranged on one side of the lining plug and the elastic threaded sleeve, the rotation stop pins penetrate the lining plug and the elastic threaded sleeve, the tip of the rotation stop pin contacts the end of the composite pipe, and the tail end of the rotation stop pin protrudes from the surface of the lining plug.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] The utility model proposes a sealing structure of a high ring stiffness composite pipe. Through the cooperation of the inner lining plug and the inner pressure sealing tile, when the threaded sealing cap is tightened, the lifting tube can be pushed by the locking push rod, so that the elastic pressure rod is rotated around the second connecting shaft, so that the elastic pressure rod is compressed and then extended, and the pressure of the elastic pressure rod is used to make the pressure sealing tile press the inner lining plug against the inner side of the composite pipe, so that multiple effects can be achieved:

[0016] First, the pressure of the pressure sealing shoe is used to open the liner plug, thereby pressurizing and sealing the gap between the liner plug and the composite pipe, which has better sealing performance than traditional sealing methods;

[0017] Second, after the threaded sealing cap is tightened, the elastic pressure rod rotates around the second connecting shaft, so that the pressure of the elastic pressure rod can achieve a self-locking effect. If the liner plug needs to be pulled out, the friction force increased by the pressure of the elastic pressure rod needs to be overcome, and even if the threaded sealing cap is loose, it will not affect the sealing effect of the liner plug;

[0018] Third, after the threaded sealing cap is tightened, pressure will be generated on the rotation stop pin, causing the rotation stop pin to press the end of the composite pipe, thereby inhibiting the rotation between the composite pipe and the liner plug and the elastic threaded sleeve, thereby effectively increasing the ring stiffness of the composite pipe sealing part. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0020] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the pressure sealing tile of the utility model;

[0022] Figure 4 It is a schematic diagram of the elastic pressure rod structure of the utility model.

[0023] In the figure: 1. composite pipe; 2. lining plug; 201. annular sealing strip; 202. annular convex strip; 3. elastic threaded sleeve; 301. deformation groove; 4. threaded sealing cap; 401. anti-skid pattern; 5. lifting tube; 6. first connecting shaft; 7. elastic pressure rod; 701. telescopic tube; 702. pressure spring; 703. telescopic rod; 8. second connecting shaft; 9. pressure sealing tile; 901. arc groove; 10. locking push rod; 1001. limit slider; 11. rotation stop pin. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings.

[0026] Combination Figure 1-Figure 4 A sealing structure for a high-ring-rigidity composite pipe comprises a composite pipe 1, wherein an inner lining plug 2 is inserted into the opening of the composite pipe 1, wherein the inner lining plug 2 is made of elastic silicone material and has good elasticity, and an annular sealing strip 201 is arranged on the outer side of the inner lining plug 2. The annular sealing strip 201 is provided in multiple groups and is arranged at equal intervals on the outer surface of the inner lining plug 2, thereby enhancing the sealing between the inner lining plug 2 and the inner wall of the composite pipe 1.

[0027] An elastic threaded sleeve 3 is sleeved on the outer side of the opening of the composite pipe 1. The elastic threaded sleeve 3 is made of metal and has four deformation grooves 301 around it. When the threaded sealing cap 4 is tightened, the elastic threaded sleeve 3 can be deformed and compressed inwardly, thereby clamping the composite pipe 1.

[0028] The elastic threaded sleeve 3 is connected with a threaded sealing cap 4 through a thread, and the outer side of the threaded sealing cap 4 is processed with anti-skid patterns 401 to enhance friction and facilitate hand tightening. A lifting tube 5 is arranged in the lining plug 2, and the lifting tube 5 is connected with an elastic pressure rod 7 through a first connecting shaft 6. The elastic pressure rod 7 includes a telescopic tube 701, and a pressure spring 702 is arranged in the telescopic tube 701. A telescopic rod 703 is arranged outside the pressure spring 702, so that the pressure spring 702 will push the telescopic rod 703 outward to press the pressure sealing tile 9. The other end of the elastic pressure rod 7 is connected with a pressure sealing tile 9 through a second connecting shaft 8. The pressure sealing tile 9 presses the lining plug 2 against the inner wall of the composite pipe 1 from the inside. An annular convex strip 202 is processed on the inner wall of the lining plug 2, and an arc groove 901 is processed on the outer side of the pressure sealing tile 9. The annular convex strip 202 and the arc groove 901 are interlocked with each other, so that the pressure sealing tile 9 cannot move when the arc groove 901 and the annular sealing strip 202 are interlocked with each other. A locking push rod 10 is fixedly connected inside the threaded sealing cap 4 , and a limiting slider 1001 is fixedly connected to the end of the locking push rod 10 . The limiting slider 1001 slides inside the lifting tube 5 .

[0029] Specifically, there are six groups of the first connecting shaft 6, the elastic pressure rod 7, the second connecting shaft 8 and the pressure sealing shoe 9, and each three groups in the six groups form a layer, and there are two layers in total, and the two layers are staggered at an angle of 60 degrees. Therefore, from the axial view, the two layers of pressure sealing shoes 9 will completely tighten the gap between the liner plug 2 and the composite pipe 1.

[0030] Specifically, a plurality of sets of rotation stop pins 11 are arranged on one side of the lining plug 2 and the elastic threaded sleeve 3, the rotation stop pins 11 penetrate the lining plug 2 and the elastic threaded sleeve 3, and the tip of the rotation stop pin 11 contacts the end of the composite pipe 1, and the tail end of the rotation stop pin 11 protrudes from the surface of the lining plug 2, so that when the threaded sealing cap 4 is tightened, the threaded sealing cap 4 will exert pressure on the rotation stop pin 11, so that the rotation stop pin 11 is pressed against the end of the composite pipe 1, thereby increasing the friction force of the rotation of the composite pipe 1 and increasing the ring stiffness of the sealing part of the composite pipe 1.

[0031] Working principle: During use, first insert the lining plug 2 into the opening of the composite pipe 1, and put the elastic threaded sleeve 3 on the outside of the opening of the composite pipe 1, and then put the lifting tube, elastic pressure rod 7 together with the pressure sealing shoe 9 into the lining plug 2, so that the arc groove 901 on the outside of the pressure sealing shoe 9 and the annular sealing strip 202 on the inside of the lining plug 2 are interlocked, and arrange the positions of multiple groups of pressure sealing shoes 9, and then tighten the threaded sealing cap 4 on the outside of the elastic threaded sleeve 3 through threads.

[0032] When the threaded sealing cap 4 is tightened, the threaded sealing cap 4 generates pressure on the elastic threaded sleeve 3. Since the elastic threaded sleeve 3 is provided with deformation grooves 301 around it, the elastic threaded sleeve 3 can be compressed inwards to clamp the composite pipe 1 from the outside.

[0033] Similarly, during the process of tightening the threaded sealing cap 4, the threaded sealing cap 4 will push the lifting tube 5 through the locking push rod 10, thereby moving the lifting tube 5 toward the inside of the lining plug 2. Since the pressure sealing shoe 9 cannot move due to the mutual engagement of the arc groove 901 and the annular sealing strip 202, the elastic pressure rod 7 will be compressed and the elastic pressure rod 7 will rotate around the second connecting shaft 8. When the elastic pressure rod 7 is rotated to be vertical to the lifting tube 5, the elastic pressure rod 7 will extend again. At this time, if the lining plug 2 is pulled outward, the elastic force of the elastic pressure rod 7 will increase the friction between the lining plug 2 and the composite pipe 1, preventing the lining plug 2 from being pulled out. Only after the threaded sealing cap 4 is completely loosened, the lifting tube 5 can be pulled out by the locking push rod 10 on the threaded sealing cap 4, and the lining plug 2 can be taken out. This structural design can effectively prevent the decrease in sealing caused by loose threads.

[0034] In addition, when the threaded sealing cap 4 is tightened, the threaded sealing cap 4 will exert pressure on the rotation stop pin 11, so that the rotation stop pin 11 is pressed against the end of the composite pipe 1, thereby increasing the friction force of the composite pipe 1 rotating and increasing the ring stiffness of the composite pipe 1 at the sealing point.

[0035] It should be noted that, in this article, relational terms such as second and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing structure for a high ring stiffness composite pipe, comprising a composite pipe (1), characterized in that: An inner lining plug (2) is inserted into the opening of the composite pipe (1); an elastic threaded sleeve (3) is sleeved on the outer side of the opening of the composite pipe (1); the elastic threaded sleeve (3) is threadedly connected to a threaded sealing cap (4); a lifting tube (5) is arranged in the inner lining plug (2); the lifting tube (5) is connected to an elastic pressure rod (7) via a first connecting shaft (6); the other end of the elastic pressure rod (7) is connected to a pressure sealing shoe (9) via a second connecting shaft (8); the pressure sealing shoe (9) presses the inner lining plug (2) against the inner wall of the composite pipe (1) from the inside; a locking push rod (10) is fixedly connected to the threaded sealing cap (4); the end of the locking push rod (10) is fixedly connected to a limiting slider (1001); the limiting slider (1001) slides in the lifting tube (5).

2. The sealing structure of a high ring stiffness composite pipe according to claim 1, characterized in that: The inner lining plug (2) is made of elastic silicone material.

3. The sealing structure of a high ring stiffness composite pipe according to claim 1, characterized in that: An annular sealing strip (201) is provided on the outside of the liner plug (2), and the annular sealing strips (201) are provided in multiple groups and are arranged at equal intervals on the outer surface of the liner plug (2).

4. The sealing structure of a high ring stiffness composite pipe according to claim 1, characterized in that: The elastic threaded sleeve (3) is made of metal, and four deformation grooves (301) are provided around the elastic threaded sleeve (3).

5. The sealing structure of a high ring stiffness composite pipe according to claim 1, characterized in that: The outer side of the threaded sealing cap (4) is processed with anti-slip grooves (401).

6. The sealing structure of a high ring stiffness composite pipe according to claim 1, characterized in that: The elastic pressure rod (7) comprises a telescopic tube (701), a pressure spring (702) is arranged inside the telescopic tube (701), and a telescopic rod (703) is arranged outside the pressure spring (702).

7. The sealing structure of a high ring stiffness composite pipe according to claim 1, characterized in that: The first connecting shaft (6), the elastic pressure rod (7), the second connecting shaft (8) and the pressure sealing shoe (9) are provided in six groups in total, and each of the three groups in the six groups forms a layer, so there are two layers in total, and the two layers are staggered at an angle of 60 degrees.

8. The sealing structure of a high ring stiffness composite pipe according to claim 1, characterized in that: An annular convex strip (202) is processed on the inner wall of the lining plug (2), and an arc-shaped groove (901) is processed on the outer side of the pressure sealing shoe (9), and the annular convex strip (202) and the arc-shaped groove (901) are interlocked.

9. The sealing structure of a high ring stiffness composite pipe according to claim 1, characterized in that: A plurality of groups of rotation stop pins (11) are provided on one side of the lining plug (2) and the elastic threaded sleeve (3); the rotation stop pins (11) penetrate the lining plug (2) and the elastic threaded sleeve (3); the tip of the rotation stop pin (11) contacts the end of the composite pipe (1); and the tail of the rotation stop pin (11) protrudes from the surface of the lining plug (2).

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