High-performance sealing ring for butt joint position of ultrahigh-pressure medium conveying pipeline of coal mine

Abstract

The utility model relates to the technical field of pipeline sealing, and provides a high-performance sealing ring for a butt joint position of ultrahigh-pressure medium conveying pipelines of a coal mine, which comprises a sealing ring body, and the sealing ring body is hermetically sleeved on the outer side between butt joint ports of two pipelines. The whole sealing ring body is further distributed between the inner side of the outer side hoop and the outer sides of the two pipeline butt joint openings, an annular groove with the inward section in a T shape is formed in the inner ring of the sealing ring body, and annular convex ribs are arranged on the two sides, close to the edge positions of ring openings on the two sides, of the inner ring of the sealing ring body; and an anti-extrusion ring is clamped between the two convex ribs on the edge of the ring opening on the same side. By means of the innovative combined structure and the convex rib design of the main sealing area, the pressure distribution of the sealing section is more reasonable, the requirement that a wide contact face exists to prevent the pipeline from deflecting and leaking can be met, the contact pressure level of the local position of the contact section can be enhanced, and the sealing reliability is improved; the polyurethane anti-extrusion ring of the special-shaped structure improves the anti-extrusion performance of the whole sealing ring.

Description

Technical Field

[0001] The utility model relates to the field of pipeline sealing, and is particularly applied to anti-leakage sealing at joints of ultra-high pressure medium transportation pipelines in coal mines, so as to realize remote transportation of high pressure medium, for example, to realize remote supply of high pressure emulsion to hydraulic support columns and jacks for coal mining support. Background Art

[0002] The long-distance ultra-high pressure medium transmission pipeline of coal mines is often made of a large number of single seamless pipes. The seamless pipe joints are not welded, but only connected and clamped with clamps. After the pressure is applied to the pipeline, if there is no sealing ring at the joint to form a closed space, the high-pressure liquid will inevitably overflow from the pipeline joint, causing pollution and waste, and long-distance transmission cannot be achieved. Therefore, it is very important to place a sealing ring between the clamp and the pipeline to prevent leakage. However, under such conditions of use, the sealing ring must meet the requirements of emulsion resistance, 40MPa and above high pressure resistance, and can adapt to the bending and offset that may occur between the two pipelines. In addition, with the continuous improvement of the structure of the pipeline clamp, the structure of the commonly used sealing ring is still at the early design level, and the material redundancy of the non-critical position of the sealing ring body is large. Therefore, this type of sealing ring is relatively thick, and the sealing ring is made of rubber elastomer fluororubber or nitrile rubber material, which is easy to produce irreversible extrusion damage in the gap between the pipeline and the clamp under the action of the high-pressure medium, greatly reducing the sealing reliability and service life, and often needs to be replaced as a whole, rarely reused, resulting in a large amount of material and material waste.

[0003] Therefore, this invention proposes a high-performance sealing ring for the joint position of the ultra-high pressure medium conveying pipeline in coal mines to solve the above problems. Utility Model Content

[0004] In order to overcome the defects of the prior art, the purpose of the utility model is to provide a high-performance sealing ring for the butt joint of an ultra-high pressure medium conveying pipeline in a coal mine.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is implemented as follows: a high-performance sealing ring used for the docking position of ultra-high pressure medium transportation pipeline in coal mines, comprising a sealing ring body, wherein the sealing ring body is sealingly sleeved on the outside between the two pipeline docking ports, and the sealing ring body as a whole is also distributed between the inner side of the outer clamp and the outer sides of the two pipeline docking ports, the inner ring of the sealing ring body is provided with an annular groove with a T-shaped inward cross-section, and annular ribs are provided on both sides of the inner ring of the sealing ring body near the edge of the ring opening on both sides, and an anti-extrusion ring is clamped between the two ribs on the edge of the ring opening on the same side.

[0006] Preferably, the overall cross-section of the anti-extrusion ring is configured as a parallelogram.

[0007] Preferably, the cross-sectional size of the anti-extrusion ring is set to 1.5 mm x 1.5 mm or 2 mm x 2 mm.

[0008] Preferably, the cross-sectional size of the rib is set to 1 mm to 1.5 mm.

[0009] Preferably, the anti-extrusion ring material is made of hydrolysis-resistant polyurethane with a hardness of ShoreA 93 or above.

[0010] Preferably, the sealing ring body is entirely made of fluororubber or nitrile rubber.

[0011] Preferably, the anti-extrusion ring and the sealing ring body are combined into one body by physical bonding.

[0012] The beneficial effects of the utility model are embodied in:

[0013] (1) The innovative combined structure and rib design of the main sealing area make the pressure distribution of the sealing section more reasonable, which can not only meet the requirement of a wider contact surface to prevent pipeline deflection and leakage, but also enhance the contact pressure level at the local position of the contact section, thereby improving the sealing reliability;

[0014] (2) The polyurethane anti-extrusion ring with special-shaped structure improves the anti-extrusion performance of the overall sealing ring and will not cause extrusion damage under a pressure of 60MPa;

[0015] (3) Based on the pressure distribution obtained from the simulation analysis, the depth of the annular groove in the middle of the seal body with lower pressure deformation is greatly reduced, thereby reducing material costs;

[0016] In addition, the integrated combination of the special-shaped polyurethane anti-extrusion ring component and the sealing body is physically fitted, which is convenient for inspection and replacement, and the polyurethane component can be injection molded, with low processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In the attached picture:

[0018] Figure 1 It is a cut-away cross-sectional schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the cross-section structure of the utility model in a sealed state;

[0020] Figure 3 It is a schematic diagram of the structure of the utility model;

[0021] Figure 4 It is a half-cut structure schematic diagram of the utility model;

[0022] Description of reference numerals:

[0023] 1. Sealing ring body; 2. Anti-extrusion ring; 3. Raised rib; 4. Annular groove. DETAILED DESCRIPTION

[0024] The utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. 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] It should be noted that if the utility model embodiments involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, "multiple" means more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0027] Please refer to the instruction manual Figure 1-Figure 4 The utility model provides a high-performance sealing ring for the butt joint of the ultra-high pressure medium conveying pipeline in coal mines, including a sealing ring body 1, wherein the sealing ring body 1 is sealingly sleeved on the outside between the butt joint ports of the two pipelines, and the sealing ring body 1 as a whole is also distributed between the inner side of the outer clamp and the outer side of the two pipeline butt joints, and the inner ring of the sealing ring body 1 is provided with an annular groove 4 with a T-shaped inward cross section, and according to the pressure distribution obtained by simulation analysis, the inner groove depth of the annular groove 4 in the middle of the sealing body with lower pressure deformation is greatly reduced, thereby reducing the material cost, and the inner ring of the sealing ring body 1 is provided with annular convex ribs 3 on both sides of the inner ring near the edge of the ring opening on both sides, and one of the two convex ribs 3 on the same side is sealed and fitted to the inner wall of the outer clamp, and the other is sealed and fitted to the outer wall of the butt joint pipe on the same side, so that the pressure distribution on the sealing contact interface is more optimized and reasonable, and the sealing reliability is improved;

[0028] An anti-extrusion ring 2 is clamped between two convex ribs 3 on the edge of the ring opening on the same side.

[0029] The overall cross-section of the anti-extrusion ring 2 is set to a parallelogram. The material of the anti-extrusion ring 2 adopts hydrolysis-resistant polyurethane with a hardness of Shore A93 or above. The cross-sectional size of the anti-extrusion ring 2 is set to 1.5mmx1.5mm or 2mmx2mm, and the anti-extrusion capability is greatly improved and guaranteed. The anti-extrusion ring 2 is combined into one with the sealing ring body 1 by physical bonding. In addition, since the polyurethane component at the high-pressure anti-extrusion position is easy to check and replace, when extrusion damage occurs, only the polyurethane special-shaped part needs to be replaced, thereby improving the cycle service life of the sealing main structure and avoiding unnecessary waste of materials to a large extent.

[0030] The cross-sectional size of the convex rib 3 is set to 1mm~1.5mm.

[0031] The sealing ring body 1 is made entirely of fluororubber or nitrile rubber.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0033] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high-performance sealing ring used for the joint position of an ultra-high pressure medium conveying pipeline in a coal mine, comprising a sealing ring body (1), characterized in that: The sealing ring body (1) is sealingly sleeved on the outside between the two pipe docking ports, and the sealing ring body (1) as a whole is also distributed between the inside of the outside clamp and the outside of the two pipe docking ports. The inner ring of the sealing ring body (1) is provided with an annular groove (4) with a T-shaped cross section facing inward. The inner ring of the sealing ring body (1) is provided with annular convex ribs (3) on both sides of the edge of the ring opening on both sides, and an anti-extrusion ring (2) is clamped between the two convex ribs (3) on the edge of the ring opening on the same side.

2. A high-performance sealing ring for use at the joint position of an ultra-high pressure medium delivery pipeline in a coal mine according to claim 1, characterized in that: The overall cross-section of the anti-extrusion ring (2) is configured as a parallelogram.

3. The high-performance sealing ring for the joint position of the coal mine ultra-high pressure medium transmission pipeline according to claim 2 is characterized in that: The cross-sectional dimensions of the anti-extrusion ring (2) are set to 1.5 mm x 1.5 mm or 2 mm x 2 mm.

4. The high-performance sealing ring for the joint position of the coal mine ultra-high pressure medium transmission pipeline according to claim 1 is characterized in that: The cross-sectional size of the convex rib (3) is set to 1 mm to 1.5 mm.

5. The high-performance sealing ring used for the joint position of the coal mine ultra-high pressure medium transmission pipeline according to claim 1 is characterized in that: The anti-extrusion ring (2) is made of hydrolysis-resistant polyurethane with a hardness of Shore A 93 or above.

6. The high-performance sealing ring for the joint position of the coal mine ultra-high pressure medium transmission pipeline according to claim 1 is characterized in that: The sealing ring body (1) is entirely made of fluororubber or nitrile rubber.

7. The high-performance sealing ring used for the joint position of the coal mine ultra-high pressure medium transmission pipeline according to claim 1 is characterized in that: The anti-extrusion ring (2) and the sealing ring body (1) are combined into one body by means of physical bonding.

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