High-temperature-resistant and high-pressure-resistant sealing sleeve

Abstract

The utility model belongs to the field of high-temperature and high-pressure tests, and particularly relates to a high-temperature and high-pressure resistant sealing sleeve which comprises a sealing sleeve upper baffle, a sealing sleeve lower baffle, an O-shaped ring and a check ring, and the sealing sleeve lower baffle is installed on one side of the sealing sleeve upper baffle. The O-shaped rings comprise the inner side O-shaped ring and the outer side O-shaped ring, the inner side O-shaped ring is located in the groove in the inner side of the upper baffle of the sealing sleeve, and the outer side O-shaped ring is located in the groove in the outer side of the upper baffle of the sealing sleeve. And check rings are arranged at the front end and the rear end of the O-shaped ring in each groove. According to the sealing assembly, the check rings at the front end and the rear end of the O-shaped ring are used for avoiding deformation caused by direct contact with the upper baffle and the lower baffle of the sealing sleeve, and then sealing failure of the O-shaped ring is avoided; two O-shaped rings are designed to seal the outer side of the upper baffle of the sealing sleeve, so that double-sealing insurance is realized; the sealing sleeve lower baffle is of a concave structure, a check ring on the sealing sleeve upper baffle can be better extruded, and therefore the inner side O-shaped ring and the outer side O-shaped ring are extruded to deform, and a better sealing effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of high temperature and high pressure testing, in particular to a sealing sleeve resistant to high temperature and high pressure. Background Art

[0002] Through the study of API RP 5C5 and special test procedures, in the TS-A test of the current API RP 5C5 level 4 test, the load conditions of the tubing and casing include high temperature (180℃-220℃), internal pressure, external pressure (up to 210MPa), axial tension and compression, lateral force and temperature changes, and the duration is up to 96 hours in an environment where high temperature and high pressure can be reached. The seal of the external pressure autoclave is prone to leakage. In view of the stringent requirements of the test, referring to the sealing forms of some hydraulic cylinders and the existing sealing sleeves and sealing equipment of the crushing test (used at room temperature), a new sealing sleeve and a new sealing form that meet the test sealing requirements are designed.

[0003] It was found during the test process that the sealing sleeve and sealing form currently used could not guarantee repeated leakage during the test cycle during high-temperature internal and external pressure tests, resulting in waste of thermal oil leakage, deformation of the sealing ring and other test costs that increased dramatically, delayed the test cycle, affected the test procedure, and in severe cases caused damage to the specimen during the test.

[0004] Figure 1 It is a schematic diagram of the structure of a common sealing sleeve in the prior art, wherein the sealing sleeve 10 is in direct contact with the step 9 in the kettle, and is very easy to be directly squeezed and deformed under high temperature and high pressure conditions, which can easily cause sealing failure, and the O-ring 7 therein does not use a retaining ring or uses a single-layer retaining ring 6 for sealing, which affects the sealing effect with the sleeve 8 and the inner wall of the kettle body.

[0005] Chinese patent CN105351525A discloses a sealing device for oil pipes. The patent only arranges an O-ring and a PTFE retaining ring on the inner side close to the oil pipe, and only uses a PTFE retaining ring on one side of the O-ring. The sealing effect is limited and is not conducive to sealing under high temperature and high pressure conditions. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a high-temperature and high-pressure resistant sealing sleeve, which can adapt to the harsh environment in which the inner cavity of the external pressure autoclave is filled with heat transfer oil, the insulation temperature is 180°C-220°C, the maximum pressure is 210MPa, and the high temperature duration is up to 96 hours. With reference to the existing sealing sleeves for horizontal crushing tests in the laboratory and the normal-temperature external pressure sealing sleeves for tests that meet ISO13692002, various sealing sleeve forms are provided. Aiming at the problems found in the test use project, the sealing sleeves are improved many times and finally finalized to meet the harsh test requirements.

[0007] The technical solution adopted by the utility model to solve the technical problem is:

[0008] The utility model provides a sealing sleeve resistant to high temperature and high pressure, comprising: a sealing sleeve upper baffle, a sealing sleeve lower baffle, an O-ring, and a retaining ring; the sealing sleeve lower baffle is installed on one side of the sealing sleeve upper baffle; the O-ring comprises an inner O-ring and an outer O-ring, the inner O-ring is located in a groove on the inner side of the sealing sleeve upper baffle, and the outer O-ring is located in a groove on the outer side of the sealing sleeve upper baffle; retaining rings are installed at the front end and the rear end of the O-ring in each groove.

[0009] Furthermore, the sealing sleeve upper baffle comprises a first end and a second end, the first end has an inner groove, an outer groove and a partition, the inner side of the partition is the inner groove, and the outer side of the partition is the outer groove.

[0010] Furthermore, the sealing sleeve lower baffle plate has a barrier layer insertion groove, and the barrier layer of the sealing sleeve upper baffle plate is inserted into the barrier layer insertion groove.

[0011] Furthermore, the outer O-rings are respectively a first outer O-ring and a second outer O-ring, the first outer O-ring is located near one end of the sealing sleeve lower baffle, and the second outer O-ring is located away from one end of the sealing sleeve lower baffle.

[0012] Furthermore, the inner O-ring is located close to one end of the lower baffle of the sealing sleeve.

[0013] Furthermore, the thickness of the retaining rings on both sides of the inner O-ring is greater than the thickness of the retaining rings on both sides of the first outer O-ring, and the thickness of the retaining rings on both sides of the first outer O-ring is greater than the thickness of the retaining rings on both sides of the second outer O-ring.

[0014] The advantages and positive effects of the utility model are:

[0015] 1. The retaining rings at the front and rear ends of the O-ring in the sealing assembly of the utility model prevent the O-ring from directly contacting the upper and lower baffles of the sealing sleeve, thereby preventing the O-ring from deforming and thus preventing the O-ring from sealing failure.

[0016] 2. The utility model has two O-ring seals on the outer side of the baffle of the sealing sleeve to achieve double sealing insurance and achieve better sealing effect in the test.

[0017] 3. The lower baffle plate of the sealing sleeve of the utility model adopts a concave structure, which can better squeeze the retaining ring on the upper baffle plate of the sealing sleeve, thereby squeezing the inner and outer O-rings to deform and obtain a better sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a common sealing sleeve in the prior art;

[0019] Figure 2 It is a structural schematic diagram of the sealing sleeve of the utility model.

[0020] The above drawings include the following reference numerals:

[0021] 1- sealing sleeve upper baffle; 11- partition; 2- sealing sleeve lower baffle; 21- partition insertion groove; 3- first outer O-ring; 4- second outer O-ring; 5- inner O-ring; 6- retaining ring; 7- O-ring; 8- casing; 9- inner step of kettle; 10- sealing sleeve. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0024] In the description of the present utility model, it should be understood that the terms "thickness", "upper", "lower", "front", "back", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0025] like Figure 2 As shown, the utility model provides a sealing sleeve resistant to high temperature and high pressure, comprising: a sealing sleeve upper baffle 1, a sealing sleeve lower baffle 2, an O-ring, and a retaining ring 6, wherein the sealing sleeve upper and lower baffles are made of suitable low-alloy steel.

[0026] The sealing sleeve lower baffle 2 is installed on one side of the sealing sleeve upper baffle 1; the O-ring includes an inner O-ring 5 and an outer O-ring, the inner O-ring 5 is located in the groove on the inner side of the sealing sleeve upper baffle 1, and the outer O-ring is located in the groove on the outer side of the sealing sleeve upper baffle 1; a retaining ring 6 is installed at the front and rear ends of each groove. The retaining rings 6 at the front and rear ends of the O-ring in the sealing assembly prevent direct contact with the upper and lower baffles of the sealing sleeve, resulting in deformation, thereby preventing the O-ring from failing in sealing. The outer side sealing design of the sealing sleeve upper baffle 1 is two O-rings to achieve double sealing insurance, which has a better sealing effect in the test.

[0027] The outer O-rings are respectively a first outer O-ring 3 and a second outer O-ring 4. The first outer O-ring 3 is located near one end of the sealing sleeve lower baffle 2, and the second outer O-ring 4 is located away from one end of the sealing sleeve lower baffle 2. The sealing sleeve upper baffle 1 includes a first end and a second end. The first end has an inner groove, an outer groove and a partition 11. The inner side of the partition 11 is the inner groove, and the outer side of the partition 11 is the outer groove. The sealing sleeve lower baffle 2 has a partition insertion groove 21, and the partition 11 of the sealing sleeve upper baffle 1 is inserted into the partition insertion groove 21. The sealing sleeve lower baffle 2 adopts a concave structure, which can better squeeze the retaining ring 6 on the sealing sleeve upper baffle 1, thereby squeezing the inner and outer O-rings to deform and obtain a better sealing effect.

[0028] In addition, the inner O-ring 5 is located near one end of the sealing sleeve lower baffle 2. The thickness of the baffles 6 on both sides of the inner O-ring 5 is greater than the thickness of the baffles 6 on both sides of the first outer O-ring 3, and the thickness of the baffles 6 on both sides of the first outer O-ring 3 is greater than the thickness of the baffles 6 on both sides of the second outer O-ring 4.

[0029] The upper baffle plate 1 of the sealing sleeve adopts a double sealing structure of the outer O-ring and an insert-type assembly method, and assists the front and rear retaining rings 6, and adopts a single sealing structure of the inner O-ring 5 and assists the front and rear retaining rings 6; the lower baffle plate 2 of the sealing sleeve adopts a baffle plate with a groove form, which can squeeze the front and rear retaining rings 6 after installation, so as to deform the O-ring to achieve a more effective sealing form. Figure 1 As shown), the newly designed sealing sleeve adds an O-ring double-layer retaining ring 6 to avoid deformation of the straight sealing sleeve contact under high temperature; and adopts a concave structure of the sealing sleeve lower baffle 2 to increase the active gap and achieve a better sealing effect.

[0030] When the sealing sleeve of the utility model is in use, the sealing sleeve lower baffle 2 is first installed into the external pressure kettle, and then the sealing component of the sealing sleeve lower baffle 2 is assembled. A certain gap is maintained between the sealing sleeve and the flange when entering the external pressure kettle, so that there is a certain amount of expansion between the sealing components under the high temperature environment, which has a better sealing effect; and when oil pressure is added inside the external pressure kettle, the sealing sleeve lower baffle 2 begins to be squeezed, and the outer side is fixed with a flange, forming an internal and external squeezing of the sealing sleeve, and then squeezing the sealing rubber component in the sealing sleeve to play the role of sealing the sleeve 8 and the inner wall of the kettle body.

[0031] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A high temperature and high pressure resistant sealing sleeve, characterized in that: include: A sealing sleeve upper baffle (1); A sealing sleeve lower baffle (2), wherein the sealing sleeve lower baffle (2) is mounted on one side of the sealing sleeve upper baffle (1); An O-ring, the O-ring comprising an inner O-ring (5) and an outer O-ring, the inner O-ring (5) being located in a groove on the inner side of the sealing sleeve upper baffle (1), and the outer O-ring being located in a groove on the outer side of the sealing sleeve upper baffle (1); A retaining ring (6) is installed at the front end and the rear end of the O-ring in each groove.

2. The high temperature and high pressure resistant sealing sleeve according to claim 1, characterized in that: The sealing sleeve upper baffle (1) comprises a first end and a second end, the first end having an inner groove, an outer groove and a partition (11), the inner side of the partition (11) being the inner groove, and the outer side of the partition (11) being the outer groove.

3. The high temperature and high pressure resistant sealing sleeve according to claim 2, characterized in that: The sealing sleeve lower baffle (2) has a barrier layer insertion groove (21), and the barrier layer (11) of the sealing sleeve upper baffle (1) is inserted into the barrier layer insertion groove (21).

4. The high temperature and high pressure resistant sealing sleeve according to claim 3, characterized in that: The outer O-rings are respectively a first outer O-ring (3) and a second outer O-ring (4); the first outer O-ring (3) is located close to one end of the sealing sleeve lower baffle (2), and the second outer O-ring (4) is located away from one end of the sealing sleeve lower baffle (2).

5. The high temperature and high pressure resistant sealing sleeve according to claim 4, characterized in that: The inner O-ring (5) is located close to one end of the lower baffle plate (2) of the sealing sleeve.

6. The high temperature and high pressure resistant sealing sleeve according to claim 5, characterized in that: The thickness of the retaining rings (6) on both sides of the inner O-ring (5) is greater than the thickness of the retaining rings (6) on both sides of the first outer O-ring (3), and the thickness of the retaining rings (6) on both sides of the first outer O-ring (3) is greater than the thickness of the retaining rings (6) on both sides of the second outer O-ring (4).

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