A sealing plug for pressure testing of composite pipes

Abstract

The utility model relates to composite pipe manufacturing technical field especially is a kind of sealing plug for composite pipe pressure test, including composite pipe body, sealing plug assembly, straight thread hole plugging assembly and taper thread hole plugging assembly, the outside of composite pipe body is equipped with sealing plug assembly, the sealing plug assembly includes and the sealing cover of sealing plug assembly screw connection, the upside inner wall of sealing cover is fixedly connected with O type sealing ring, the inside of O type sealing ring is equipped with flared sealing ring, in the utility model, through the O type sealing ring, flared sealing ring, rubber sleeve and support sleeve being set, the device can be sealed to the connecting place of composite pipe body and sealing cover by flared sealing ring cooperation O type sealing ring, meanwhile, the joint connecting place of pressurizing device is sealed by support sleeve and rubber sleeve, the device has higher sealing property, can effectively improve the accuracy and reliability of test.

Description

Technical Field

[0001] This utility model relates to the field of composite pipe manufacturing technology, specifically a sealing plug for pressure resistance testing of composite pipes. Background Technology

[0002] In the pressure resistance test of composite pipes, the function of the sealing plug is to seal the end of the pipe so that high-pressure liquid or gas can be injected into the pipe during the test to test the pressure resistance performance of the composite pipe. The sealing plug used for the pressure resistance test of composite pipes is a key component to ensure the accuracy and safety of the pressure resistance test. When conducting the pressure resistance test, the sealing plug needs to be rigidly connected to the sample to ensure that the hydrostatic end thrust can be transmitted to the sample.

[0003] Existing sealing plugs for pressure resistance testing of composite pipes are metal screw cap structures with relatively simple overall structures. They only seal the joint between the sealing plug and the sample using an O-ring. Although this ensures a rigid connection between the sealing plug and the sample, the sealing performance is insufficient, resulting in unsatisfactory test results and consequently, insufficient test reliability. Therefore, a new sealing plug for pressure resistance testing of composite pipes is proposed to address the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a sealing plug for pressure testing of composite pipes, so as to solve the problem of insufficient sealing performance of some existing sealing plugs for pressure testing of composite pipes.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A sealing plug for pressure testing of a composite pipe includes a composite pipe body, a sealing plug assembly, a straight threaded hole sealing assembly, and a tapered threaded hole sealing assembly. The sealing plug assembly is located on the outer side of the composite pipe body. The sealing plug assembly includes a sealing cap threadedly connected to the composite pipe body. An O-ring is fixedly connected to the upper inner wall of the sealing cap. An flared sealing ring is fixedly connected to the inner side of the O-ring and to the upper inner wall of the sealing cap. A first pressure port is fixedly connected to the upper front half of the sealing cap's through-hole, and a second pressure port is fixedly connected to the upper rear half of the sealing cap's through-hole. Rubber sleeves, fixedly connected to the upper end face of the sealing cap, are fixedly connected to the outer sides of both the first and second pressure ports. The outer side of the rubber sleeve is fixedly connected to a support sleeve that is fixedly connected to the upper end face of the sealing cap. The front half of the sealing plug assembly is provided with a straight thread hole sealing assembly. The straight thread hole sealing assembly includes a first knob located directly above the first pressurizing port. The lower end of the first knob is fixedly connected to a first pressure block. The lower end of the first pressure block is fixedly connected to a straight thread sealing block that is threadedly connected to the first pressurizing port. The rear half of the sealing plug assembly is provided with a tapered thread hole sealing assembly. The tapered thread hole sealing assembly includes a second knob located directly above the second pressurizing port. The lower end of the second knob is fixedly connected to a second pressure block. The lower end of the second pressure block is fixedly connected to a tapered thread sealing block that is threadedly connected to the second pressurizing port.

[0007] Preferably, the upper end of the composite pipe body is provided with an external thread, the upper half of the sealing cap is provided with an internal thread, the inner diameter of the O-ring is equal to the inner diameter of the composite pipe body, and the outer diameter of the O-ring is smaller than the outer diameter of the composite pipe body.

[0008] Preferably, the flared sealing rings are all circular, bucket-shaped rubber rings, and the maximum diameter of the flared sealing ring is equal to the inner diameter of the composite pipe body.

[0009] Preferably, the upper ends of both the rubber sleeve and the support sleeve protrude beyond the upper end of the first pressurization port, and the interior of the rubber sleeve is provided with annular protrusions.

[0010] Preferably, the first pressure block and the second pressure block are both composed of two cylindrical blocks. The diameter of the upper cylindrical block of the first pressure block and the second pressure block is larger than the diameter of the lower cylindrical block. The curved sides of the first pressure block and the second pressure block are in close contact with the inner wall of the upper part of the rubber sleeve.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] In this invention, by using an O-ring, a flared sealing ring, a rubber sleeve, and a support sleeve, the device can seal the connection between the composite tube body and the sealing cap by using the flared sealing ring in conjunction with the O-ring. At the same time, the support sleeve and the rubber sleeve can seal the joint connection of the pressurizing device. This device has higher sealing performance and can effectively improve the accuracy and reliability of the test. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the composite pipe body structure of this utility model;

[0016] Figure 4 This is a cross-sectional view of the sealing plug assembly of this utility model;

[0017] Figure 5 This is a schematic diagram of the straight thread hole plugging assembly of this utility model;

[0018] Figure 6 This is a schematic diagram of the tapered thread hole sealing assembly of this utility model;

[0019] Figure 7 This is a cross-sectional view of the flared sealing ring of this utility model.

[0020] In the diagram: 1. Composite pipe body; 2. Sealing plug assembly; 21. Sealing cap; 22. O-ring seal; 23. Flared sealing ring; 24. First pressurizing port; 25. Second pressurizing port; 26. Rubber sleeve; 27. Support sleeve; 3. Straight thread hole plugging assembly; 31. First knob; 32. First pressure block; 33. Straight thread plugging block; 4. Tapered thread hole plugging assembly; 41. Second knob; 42. Second pressure block; 43. Tapered thread plugging block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0023] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0024] Please see Figure 1-7 This utility model provides a technical solution:

[0025] A sealing plug for pressure resistance testing of a composite pipe includes a composite pipe body 1, a sealing plug assembly 2, a straight threaded hole sealing assembly 3, and a tapered threaded hole sealing assembly 4. The sealing plug assembly 2 is provided on the outer side of the composite pipe body 1. The sealing plug assembly 2 includes a sealing cap 21 threadedly connected to the composite pipe body 1. An O-ring 22 is fixedly connected to the upper inner wall of the sealing cap 21. An flared sealing ring 23 is fixedly connected to the inner side of the O-ring 22 and to the upper inner wall of the sealing cap 21. A first pressure port 24 is fixedly connected to the through hole in the upper front half of the sealing cap 21. A second pressure port 25 is fixedly connected to the through hole in the upper rear half of the sealing cap 21. Rubber sleeves 26, which are fixedly connected to the upper end face of the sealing cap 21, are fixedly connected to the outer sides of both the first and second pressure ports 24 and 25. The outer side of the rubber sleeve 26 is fixedly connected to the support sleeve 27, which is fixedly connected to the upper end face of the sealing cap 21. The front half of the sealing plug assembly 2 is provided with a straight thread hole sealing assembly 3. The straight thread hole sealing assembly 3 includes a first knob 31 located directly above the first pressurizing port 24. The lower end of the first knob 31 is fixedly connected to a first pressure block 32. The lower end of the first pressure block 32 is fixedly connected to a straight thread sealing block 33 that is threadedly connected to the first pressurizing port 24. The rear half of the sealing plug assembly 2 is provided with a tapered thread hole sealing assembly 4. The tapered thread hole sealing assembly 4 includes a second knob 41 located directly above the second pressurizing port 25. The lower end of the second knob 41 is fixedly connected to a second pressure block 42. The lower end of the second pressure block 42 is fixedly connected to a tapered thread sealing block 43 that is threadedly connected to the second pressurizing port 25.

[0026] The upper end of the composite pipe body 1 is provided with external threads, and the upper half of the sealing cap 21 is provided with internal threads. The inner diameter of the O-ring 22 is equal to the inner diameter of the composite pipe body 1, and the outer diameter of the O-ring 22 is smaller than the outer diameter of the composite pipe body 1. By compressing the O-ring 22 with the sealing cap 21 and the composite pipe body 1, the connection between the composite pipe body 1 and the sealing cap 21 can be sealed. The flared sealing rings 23 are all circular funnel-shaped rubber rings. The maximum diameter of the flared sealing ring 23 is equal to the inner diameter of the composite pipe body 1. The high pressure inside the composite pipe body 1 makes the outer side of the flared sealing ring 23 contact the inner wall of the composite pipe body 1 more tightly, thus connecting the composite pipe body 1 and the sealing cap 21. The joints of the pressurizing device are sealed. The upper ends of the rubber sleeve 26 and the support sleeve 27 both protrude from the upper end of the first pressurizing port 24. The inside of the rubber sleeve 26 is provided with annular protrusions. The joints of the pressurizing device can be sealed by the support sleeve 27 and the rubber sleeve 26. The first pressure block 32 and the second pressure block 42 are both composed of two cylindrical blocks. The diameter of the upper cylindrical block of the first pressure block 32 and the second pressure block 42 is larger than the diameter of the lower cylindrical block. The curved sides of the first pressure block 32 and the second pressure block 42 are tightly fitted to the inner wall of the upper part of the rubber sleeve 26. The device can be used with pressurizing devices with different joints by installing and removing the straight thread sealing block 33 and the tapered thread sealing block 43.

[0027] Workflow: The sealing cap 21, O-ring 22, and flared sealing ring 23 of this device can be customized according to the inner and outer diameters of the composite pipe body 1. Before use, the sealing cap 21, O-ring 22, and flared sealing ring 23 that match the inner and outer diameters of the composite pipe body 1 are selected. The manufacturing processes of the sealing cap 21, O-ring 22, and flared sealing ring 23 are all existing technologies. When using this device, the operator first threads the sealing cap 21 onto both ends of the composite pipe body 1, ensuring a tight fit between both ends of the composite pipe body 1 and the O-ring 22. The O-ring 22 then seals the composite pipe body. The connection between the body 1 and the sealing cap 21 is sealed. At this time, the outer side of the flared sealing ring 23 contacts the inner wall of the composite pipe body 1. Then, the operator selects the first pressure port 24 or the second pressure port 25 for connection according to the outer side of the pressurizing device connector. If the first pressure port 24 is selected for connection, the operator can turn the first knob 31, which drives the straight thread sealing block 33 to rotate through the first pressure block 32, thereby removing the straight thread sealing block 33 and threading the pressurizing device connector and the first pressure port 24. The pressurizing device connector and the first pressure port 24 can cooperate with the support sleeve 27 to compress the rubber sleeve 26, through the rubber sleeve Pipe 26 can seal the connection between the pressurizing device connector and the first pressurizing port 24. If the second pressurizing port 25 is selected for connection, the operator can turn the second knob 41, which drives the tapered thread sealing block 43 to rotate through the second pressure block 42, thereby removing the tapered thread sealing block 43 and threading the pressurizing device connector and the second pressurizing port 25. Similarly, the connection between the pressurizing device connector and the second pressurizing port 25 can be sealed through the rubber sleeve 26. Then, the operator starts the pressurizing device to pressurize, filling the composite pipe body 1 with liquid or gas, increasing the pressure inside the composite pipe body 1. At this time, the pressure can seal the flared end. The deformation of the sealing ring 23 causes the outer side of the flared sealing ring 23 to come into close contact with the inner wall of the composite pipe body 1. The greater the pressure inside the composite pipe body 1, the tighter the contact between the outer side of the flared sealing ring 23 and the inner wall of the composite pipe body 1. The flared sealing ring 23 can further improve the sealing performance at the connection between the composite pipe body 1 and the sealing cap 21. This device can seal the connection between the composite pipe body 1 and the sealing cap 21 by using the flared sealing ring 23 in conjunction with the O-ring sealing ring 22. At the same time, the support sleeve 27 and the rubber sleeve 26 can seal the joint connection of the pressurizing device. This device has higher sealing performance and can effectively improve the accuracy and reliability of the test.

[0028] Contents not described in detail in this specification are existing technologies known to those skilled in the art. Standard parts used in this invention can all be purchased commercially, and irregularly shaped parts can be custom-made according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are already mature technologies. The machinery, parts, and equipment all use conventional models from the prior art, and the circuit connections also employ conventional connection methods from the prior art, which will not be detailed here.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing plug for pressure testing of composite pipes, comprising a composite pipe body (1), a sealing plug assembly (2), a straight threaded hole sealing assembly (3), and a tapered threaded hole sealing assembly (4), characterized in that: A sealing plug assembly (2) is provided on the outside of the composite pipe body (1). The sealing plug assembly (2) includes a sealing cap (21) threadedly connected to the composite pipe body (1). An O-ring (22) is fixedly connected to the upper inner wall of the sealing cap (21). An flared sealing ring (23) is fixedly connected to the upper inner wall of the sealing cap (21) on the inner side of the O-ring (22). A first pressurizing port (24) is fixedly connected to the upper front half of the sealing cap (21). A second pressurizing port (25) is fixedly connected to the upper rear half of the sealing cap (21). A rubber sleeve (26) is fixedly connected to the upper end face of the sealing cap (21) on the outside of both the first pressurizing port (24) and the second pressurizing port (25). A rubber sleeve (26) is fixedly connected to the upper end face of the sealing cap (21) on the outside of both the rubber sleeve (26). The supporting sleeve (27) is connected. The front half of the sealing plug assembly (2) is provided with a straight thread hole sealing assembly (3). The straight thread hole sealing assembly (3) includes a first knob (31) located directly above the first pressurizing port (24). The lower end of the first knob (31) is fixedly connected to a first pressure block (32). The lower end of the first pressure block (32) is fixedly connected to a straight thread sealing block (33) threadedly connected to the first pressurizing port (24). The rear half of the sealing plug assembly (2) is provided with a tapered thread hole sealing assembly (4). The tapered thread hole sealing assembly (4) includes a second knob (41) located directly above the second pressurizing port (25). The lower end of the second knob (41) is fixedly connected to a second pressure block (42). The lower end of the second pressure block (42) is fixedly connected to a tapered thread sealing block (43) threadedly connected to the second pressurizing port (25).

2. The sealing plug for pressure testing of composite pipes according to claim 1, characterized in that: The upper end of the composite pipe body (1) is provided with an external thread, the upper half of the sealing cap (21) is provided with an internal thread, the inner diameter of the O-ring (22) is equal to the inner diameter of the composite pipe body (1), and the outer diameter of the O-ring (22) is smaller than the outer diameter of the composite pipe body (1).

3. A sealing plug for pressure testing of composite pipes according to claim 1, characterized in that: The flared sealing rings (23) are all circular bucket-shaped rubber rings, and the maximum diameter of the flared sealing rings (23) is equal to the inner diameter of the composite pipe body (1).

4. A sealing plug for pressure testing of composite pipes according to claim 1, characterized in that: The upper ends of the rubber sleeve (26) and the support sleeve (27) both protrude from the upper end of the first pressurization port (24), and the interior of the rubber sleeve (26) is provided with annular protrusions.

5. A sealing plug for pressure testing of composite pipes according to claim 1, characterized in that: The first pressure block (32) and the second pressure block (42) are both composed of two cylindrical blocks. The diameter of the upper cylindrical block of the first pressure block (32) and the second pressure block (42) is larger than the diameter of the lower cylindrical block. The curved sides of the first pressure block (32) and the second pressure block (42) are tightly fitted to the inner wall of the upper part of the rubber sleeve (26).

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