High-pressure fire-resistant zero-leakage through-diameter self-sealing joint

Abstract

The utility model provides a high-pressure fireproof zero-leakage through-diameter self-sealing connector which comprises a male head end and a female head end which are connected through a nut, the male head end comprises a male head and a male head connecting body, and the male head connecting body is fixedly connected to the left end of the periphery of the male head in a sleeved mode; a disc chuck valve seat is arranged on the inner circumference of the left end of the male head, a male head valve element lining is arranged on the inner circumference of the right end of the male head, a male head valve element assembly is arranged in the middle of the interior of the male head, and springs are arranged among the three. The female head end comprises a female head and a female head connector, the female head connector sleeves the right end of the female head, a baffle seat is arranged between the female head and the female head connector, a female head bushing is arranged on the inner circumference of the left end of the female head, the right end of the female head bushing is nested into the left end of the inner circumference of the baffle seat, and a spring is arranged between the female head bushing and the baffle seat; a faceplate valve seat is arranged at the right end in the baffle seat, and a valve rod is supported by the female head lining. The high-pressure and high-flow medium can be conveyed in a high-temperature and flame environment, meanwhile, zero leakage can be achieved, and the environment-friendly requirement is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline joints, and in particular relates to a high-pressure fire-resistant zero-leakage diameter self-sealing joint. Background Art

[0002] As a transition device for connecting pipelines, the two-way self-sealing quick connector improves the inevitable leakage of fluid in the pipe during the disconnection and connection process of traditional quick connectors. It integrates the functions of valves and connectors. By rotating clockwise and counterclockwise to connect and disconnect the fluid path, it can save the intermediate devices such as valves and flanges at the back end. Dry quick connectors are professionally used in offshore oil exploration platforms, chemicals, pharmaceuticals, and related petrochemical fields, mainly for the transportation of dangerous and precious liquids and gases. For the transportation of high-risk chemicals, grease, steam, LPG and fluids that need to be isolated from the outside, therefore, under the above working environment, it is necessary not only to ensure the physical properties of the pipeline but also to ensure the sealing and pressure and high temperature resistance at the joint. Utility Model Content

[0003] In view of the above defects or deficiencies in the prior art, the utility model provides a high-pressure fire-resistant zero-leakage self-sealing joint in order to solve the above problems in the prior art.

[0004] The main technical solution is: a high-pressure fire-resistant zero-leakage self-sealing joint, including a male end and a female end, the male and female ends are connected by nuts,

[0005] The male end includes a male head and a male head connector, the male head connector is fixedly sleeved on the left end of the outer periphery of the male head, the inner periphery of the left end of the male head is provided with a first faceplate valve seat, the inner periphery of the right end of the male head is provided with a male head valve core bushing, a male head valve core assembly is provided at the middle position inside the male head, and first springs are respectively provided between the male head valve core bushing, the male head valve core assembly and the first faceplate valve seat;

[0006] The female end includes a female and a female connector, the female connector is sleeved on the right end of the female, a baffle seat is arranged between the female and the female connector, a female bushing is arranged on the inner periphery of the left end of the female, the right end of the female bushing is nested and connected to the left end of the inner periphery of the baffle seat and a second spring is arranged between the two; a second disc valve seat is arranged on the right end of the baffle seat, and the second disc valve seat and the female bushing support a valve stem.

[0007] Furthermore, the middle position of the inner circumference of the male head is a trapezoidal groove, through holes are evenly arranged on the faceplate of the first faceplate valve seat, and an unpunched hole groove is opened at the center position of the right end of the first faceplate valve seat.

[0008] Furthermore, the male valve core assembly includes valve core assembly 1, valve core assembly 2 and valve core assembly 3 which are arranged in sequence from left to right. The outer peripheral longitudinal cross-section of the valve core assembly 2 is "T"-shaped and is in sealing contact with the slope surface of the inner peripheral groove of the male head.

[0009] Furthermore, the inner circumference of the valve core component 2 is a three-level stepped through hole that increases in height from left to right, the right end of the valve core component 1 is nested and connected to the left end of the valve core component 2, and the valve core component 3 is nested and connected to the right end of the valve core component 2, and a first spring is arranged between the valve core component 1 and the valve core component 3.

[0010] Furthermore, the outer diameter of the third left end of the valve core component is the same as the inner diameter of the hole groove of the first disc valve seat and they are nested with each other.

[0011] Furthermore, a first sealing member is provided at the interface between the male head, the male head connector and the male head valve core bushing.

[0012] Furthermore, the female head bushing includes a bushing 1 and a bushing 2, the bushing 2 is stepped and fits with the inner circumference of the female head, and the bushing set is arranged on the inner circumference of the bushing 2.

[0013] Furthermore, springs are provided between the bushing 1 and the bushing 2 and the baffle seat, and a second sealing member is provided at the overlap between the bushing 1 and the baffle seat.

[0014] Furthermore, the second disc valve seat is disc-shaped, with through holes arranged in the center of the disc and in a ring around the disc, the right end of the valve stem fits into the central through hole of the second disc valve seat, and a second sealing member is arranged between the left end of the valve stem and the first bushing.

[0015] Furthermore, a connecting nut is sleeved on the outer periphery of the left end of the female head, and a second sealing member is arranged between the female head and the connecting nut. The connecting nut can be tightened with the male head through a connecting thread to connect the female head end and the male head end to each other.

[0016] The beneficial effects of the utility model are: it has the advantages of high safety, environmental protection and speed. When switching pipelines, it is no longer necessary to close the main valve to worry about fluid spillage; it only takes a few seconds to complete the delivery of dangerous fluids by hand. The excellent sealing performance effectively prevents leakage of the product, and the operation is simpler and the safety performance is better.

[0017] 1. Applicable to working pressure ≤70Mpa;

[0018] 2. A variety of external connection methods are available, the connector is detachable and reusable, the connection is quick, and the operation time is saved;

[0019] 3. The occupied space is greatly reduced, the number of connections is reduced, and the security risks are reduced;

[0020] 4. Achieve full-diameter mode, no fluid obstruction, no flow loss during transportation;

[0021] 5. Fire resistance: The fire resistance performance is sufficient to withstand working pressure for at least 5 minutes at a temperature of 704℃.

[0022] 6. Suitable for a variety of fluid media.

[0023] 7. There is no leakage after separation, which meets environmental protection requirements and you can use it without worries. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0025] Figure 1 This is a schematic diagram of the semi-section structure of the male end of the self-sealing connector of the utility model;

[0026] Figure 2 This is a schematic diagram of the half-section structure of the female end of the self-sealing joint of the utility model;

[0027] Figure 3 This is a half-section structural schematic diagram of the valve core assembly of the self-sealing joint male head of the utility model;

[0028] Among them: male end: 1, male connector; 2, male; 3, valve core component 1; 4, male valve core bushing; 5, valve core component 2; 6, valve core component 3; 7, first disc valve seat; 8, first spring; 9, first sealing member; 10, connecting thread;

[0029] Female end: 10, connecting thread; 11, connecting nut; 12, female; 13, female connector; 14, second disc valve seat; 15, baffle seat; 16, second spring; 17, bushing 1; 18, valve stem; 19, bushing 2; 20, second sealing member. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.

[0031] 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 application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] A high-pressure fire-resistant zero-leakage self-sealing joint, comprising a male end and a female end, the male and female ends are connected by nuts.

[0033] The male end includes a male head 2 and a male head connector 1, the male head connector 1 is fixedly sleeved on the left end of the outer periphery of the male head 2, a first faceplate valve seat 7 is arranged on the inner periphery of the left end of the male head 2, a male head valve core bushing 4 is arranged on the inner periphery of the right end of the male head 2, a male head valve core assembly is arranged at the middle position inside the male head 2, and a first spring 8 is arranged between the male head valve core bushing 4, the male head valve core assembly and the first faceplate valve seat 7 respectively;

[0034] The female end includes a female head 12 and a female head connector 13, the female head connector 13 is sleeved on the right end of the female head 12, a baffle seat 15 is arranged between the female head 12 and the female head connector 13, a female head bushing is arranged on the inner periphery of the left end of the female head 12, the right end of the female head bushing is nested and connected to the left end of the inner periphery of the baffle seat 15, and a second spring 16 is arranged between the two; a second disc valve seat 14 is arranged on the right end of the baffle seat 15, and the second disc valve seat 14 and the female head bushing support a valve stem 18.

[0035] The middle position of the inner circumference of the male head 2 is a trapezoidal groove, and through holes are evenly arranged on the faceplate of the first faceplate valve seat 7. An unpierced hole groove is opened at the center position of the right end of the first faceplate valve seat 7.

[0036] The male valve core assembly includes valve core assembly 1 3 , valve core assembly 2 5 and valve core assembly 3 6 which are arranged in sequence from left to right. The outer peripheral longitudinal cross-section of valve core assembly 2 5 is “T” shaped and is in sealing contact with the inner peripheral groove slope of the male head 2 .

[0037] The inner circumference of the valve core component 2 5 is a three-level stepped through hole that increases in height from left to right. The right end of the valve core component 1 3 is nested and connected to the left end of the valve core component 2 5, and the valve core component 3 6 is nested and connected to the right end of the valve core component 2 5. A first spring 8 is arranged between the valve core component 1 3 and the valve core component 3 6.

[0038] The outer diameter of the left end of the valve core component 3 6 is the same as the inner diameter of the hole groove of the first disc valve seat 7 and they are nested and connected with each other.

[0039] A first sealing member 9 is provided at the interface between the male connector 2 and the male connector body 1 and the male valve core bushing 4 .

[0040] The female head bushing includes a bushing 17 and a bushing 2 19 . The bushing 2 19 is stepped and fits the inner circumference of the female head 12 . The bushing 17 is sleeved on the inner circumference of the bushing 2 19 .

[0041] Springs are arranged between the bushing 1 17 and the bushing 2 19 and the baffle seat 15 , and a second sealing member 20 is arranged at the overlap between the bushing 1 17 and the baffle seat 15 .

[0042] The second disc valve seat 14 is disc-shaped, with through holes in the center and around the disc. The right end of the valve stem 18 fits into the center through hole of the second disc valve seat 14, and a second sealing member 20 is provided between the left end of the valve stem 18 and the bushing 17.

[0043] A connecting nut 11 is sleeved on the left end of the female head 12, and a second sealing member 20 is arranged between the female head (12) and the connecting nut 11. The connecting nut 11 can be tightened with the male head 2 through the connecting thread 10 to connect the female head end and the male head end to each other.

[0044] The basic structure of the high-pressure, fire-resistant, zero-leakage self-sealing joint consists of a male end and a female end. The male and female ends are connected by nuts. The valve core adopts a flat structure with good centering. The external connection can be threaded or other methods. Different materials and processing methods are used according to different media, and the seals meet the requirements at the same time.

[0045] 1. Male end: The male end adopts a combined structure, which is composed of an external connection part, a fixed first faceplate valve seat 7, a male valve core, a first spring 8, a first sealing part 9, etc. It can be used as a one-way valve alone or connected to the female end as a set to open and close the valve core to complete the connection or closing of the channel to achieve the delivery or cutoff of the medium; one end is connected to the outside by NPT thread or other means, and the other end is a self-sealing joint body connected to the female end; after the male and female heads are connected, the valve stem 18 of the female end pushes the valve core component 1 3, valve core component 2 5 and valve core component 3 6 of the male end to move, and after the valve core moves to a certain position, the medium flow channel with the first faceplate valve seat 7 behind is opened, thereby achieving connection; after the male and female heads are separated, under the action of the first spring 8, the valve core components 3 / 5 / 6 are reset in sequence, the medium flow channel is closed, and there is no leakage under zero pressure.

[0046] 2. Female end: The female end adopts a combined structure, which consists of an external connector, a fixed second disc valve seat 14, a valve stem 18, a bushing 17 / bushing 2 19, a second spring 16, a seal 20, etc. One end is connected to the outside by NPT thread, and the other end is connected to the male end by a nut. The middle is a self-sealing joint body, which can be used as a one-way valve alone or connected to the male end to open and close the valve core, complete the connection or close the channel, and realize the delivery or cutoff of the medium; the middle valve stem 18 and the back The second faceplate valve seat 14 is fixed. After the male and female heads are connected, the protruding part of the male head end pushes the bushing 2 19 of the female head end to move, thereby pushing the bushing 17 behind to move backward, and the bushing 17 and the fixed valve stem 18 are separated, and the medium flow channel is opened, thereby achieving communication. After the male and female heads are separated, under the action of the second spring 16, the bushing 17 and the bushing 2 19 are reset. After the reset, the bushing 17 is sealed by the second sealing member 20 on the valve stem 18, the medium flow channel is closed, and there is no leakage under zero pressure.

[0047] 3. The sealing ring made of special formula has the characteristics of fire resistance, high temperature resistance and sulfur resistance. The fire resistance performance meets the requirements of withstanding working pressure for at least 5 minutes at a temperature of 704℃; the sulfur resistance performance meets the requirements of NACE MR 175 standard.

[0048] 4. Connecting nut The connecting nut and female head form the female head body, which plays the role of connection and centering.

[0049] High-pressure, fire-resistant, zero-leakage self-sealing joints are suitable for quick connection in all medium-pressure and high-pressure occasions, suitable for working pressure ≤70Mpa, the joint diameter is unobstructed, and the special process is adopted, and the sealing part is stable, reliable, and does not fall off; after the male and female heads are threaded, the valve is opened and the medium flows, and after separation, it closes automatically, zero leakage, prevents the internal liquid from leaking out, protects the environment, and prevents fire; the end adopts a flat design, reliable centering, and the joint has a large effective cross-sectional area, which can realize large-flow medium transportation without flow obstruction; this joint adopts innovative technology, which can not only realize the transportation of high-pressure and large-flow media in high-temperature and flame environments, but also achieve zero leakage and meet environmental protection requirements. When connected, the switch is turned on to realize medium flow transportation, and when disconnected, the switch is closed to achieve zero leakage and meet environmental protection requirements; the structure is more compact, which greatly reduces the occupied space, and a variety of connection methods are optional, detachable, reusable, quick to connect, and save operation time; it realizes large-flow medium transportation and improves medium transportation efficiency. Users do not need to consider flow loss when designing; it has fire resistance and can be used in high-temperature and flammable places, and has sulfur resistance and can be used normally in sulfur-containing environments.

[0050] In summary, its characteristics are:

[0051] 1. Applicable to working pressure ≤70Mpa;

[0052] 2. A variety of external connection methods are available, the connector is detachable and reusable, the connection is quick, and the operation time is saved;

[0053] 3. The occupied space is greatly reduced, the number of connections is reduced, and the security risks are reduced;

[0054] 4. Achieve full-diameter mode, no fluid obstruction, no flow loss during transportation;

[0055] 5. Fire resistance: The fire resistance performance is sufficient to withstand working pressure for at least 5 minutes at a temperature of 704℃.

[0056] 6. Suitable for a variety of fluid media.

[0057] 7. There is zero leakage after separation, which meets environmental protection requirements and you can use it without any worries.

[0058] 8. The anti-sulfur performance meets the requirements of NACE MR 175.

[0059] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

Claims

1. A high-pressure fire-resistant zero-leakage self-sealing joint, comprising a male end and a female end, wherein the male end and the female end are connected by a nut, characterized in that: The male end comprises a male head (2) and a male head connector (1), wherein the male head connector (1) is fixedly sleeved on the left end of the outer periphery of the male head (2), a first faceplate valve seat (7) is arranged on the inner periphery of the left end of the male head (2), a male head valve core bushing (4) is arranged on the inner periphery of the right end of the male head (2), a male head valve core assembly is arranged at the middle position inside the male head (2), and a first spring (8) is arranged respectively between the male head valve core bushing (4), the male head valve core assembly and the first faceplate valve seat (7); The female end comprises a female head (12) and a female head connector (13), wherein the female head connector (13) is sleeved on the right end of the female head (12), a baffle seat (15) is arranged between the female head (12) and the female head connector (13), a female head bushing is arranged on the inner periphery of the left end of the female head (12), the right end of the female head bushing is nested and connected to the left end of the inner periphery of the baffle seat (15), and a second spring (16) is arranged between the two; a second disc valve seat (14) is arranged on the right end of the baffle seat (15), and the second disc valve seat (14) and the female head bushing support a valve stem (18).

2. A high-pressure fire-resistant zero-leakage self-sealing joint according to claim 1, characterized in that: The middle position of the inner circumference of the male head (2) is a trapezoidal groove, the first faceplate valve seat (7) is evenly provided with through holes at the faceplate, and an unpierced hole groove is opened at the center position of the right end of the first faceplate valve seat (7).

3. A high-pressure fire-resistant zero-leakage self-sealing joint according to claim 2, characterized in that: The male valve core assembly comprises a valve core assembly 1 (3), a valve core assembly 2 (5) and a valve core assembly 3 (6) which are arranged in sequence from left to right. The outer peripheral longitudinal cross section of the valve core assembly 2 (5) is in a "T" shape and is in sealing contact with the inner peripheral groove slope of the male head (2).

4. A high-pressure fire-resistant zero-leakage self-sealing joint according to claim 3, characterized in that: The inner periphery of the valve core component 2 (5) is a three-level stepped through hole that increases in height from left to right. The right end of the valve core component 1 (3) is nested and connected to the left end of the valve core component 2 (5). The valve core component 3 (6) is nested and connected to the right end of the valve core component 2 (5). A first spring (8) is provided between the valve core component 1 (3) and the valve core component 3 (6).

5. A high-pressure fire-resistant zero-leakage self-sealing joint according to claim 3, characterized in that: The outer diameter of the left end of the valve core component three (6) is the same as the inner diameter of the hole groove of the first faceplate valve seat (7), and the two are nested and connected with each other.

6. A high-pressure fire-resistant zero-leakage self-sealing joint according to claim 1, characterized in that: A first sealing member (9) is provided at the interface between the male head (2), the male head connector (1) and the male head valve core bushing (4).

7. A high-pressure fire-resistant zero-leakage self-sealing joint according to claim 1, characterized in that: The female head bushing comprises a bushing 1 (17) and a bushing 2 (19); the bushing 2 (19) is stepped and fits the inner circumference of the female head (12); the bushing 1 (17) is sleeved on the inner circumference of the bushing 2 (19).

8. A high-pressure fire-resistant zero-leakage self-sealing joint according to claim 7, characterized in that: Springs are arranged between the bushing 1 (17) and the bushing 2 (19) and the baffle seat (15), and a second sealing member (20) is arranged at the overlap between the bushing 1 (17) and the baffle seat (15).

9. A high-pressure fire-resistant zero-leakage self-sealing joint according to claim 7, characterized in that: The second faceplate valve seat (14) is in the shape of a disc, with through holes arranged in the center of the disc and in a ring around the disc. The right end of the valve stem (18) fits into the center through hole of the second faceplate valve seat (14), and a second sealing member (20) is arranged between the left end of the valve stem (18) and the bushing 1 (17).

10. A high pressure fire resistant zero leakage self-sealing joint according to claim 1, characterized in that: A connecting nut (11) is sleeved on the outer periphery of the left end of the female head (12), and a second sealing member (20) is provided between the female head (12) and the connecting nut (11). The connecting nut (11) can be tightened with the male head (2) via a connecting thread (10) so that the female head end and the male head end are connected to each other.

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