WO2018192108A1 - Sealed connection device - Google Patents

Abstract

A sealed connection device (10), comprising a first port element (100), a second port element (200), a first sealing element (400), and a first locking element (300). The first port element (100) has a first connection end (102), and a first flange (110) is provided at the first connection end (102), the first flange (110) having a first surface (112) and a second surface (114) which are provided axially at an interval. The second port element (200) has a second connection end (202). In an assembly state, the first connection end (102) is connected to the second connection end (202) to allow the interior of the first port element (100) to be communicated with the interior of the second port element (200); the first locking element (300) axially presses the first sealing element (400) between the second surface (114) of the first flange (110) of the first port element (100) and the first locking element (300), to isolate the first port element (100) and the second port element (200) from the outside by means of the first sealing element (400)

Description

Sealed connection

Related application

This application is filed on April 19, 2017, the application number is 201710258285.2, the Chinese patent application named "sealed connection device", application on May 10, 2017, the application number is 201710327590.2, the name is "sealed connection device" And the priority of the Chinese Patent Application, the entire disclosure of which is hereby incorporated by reference in its entirety in its entirety in its entirety in

Technical field

The present application relates to the field of sealing, and more particularly to a sealing connection device for connecting high temperature, high pressure, variable temperature and variable pressure fluid medium pipes and equipment.

Background technique

Conveying lines and storage containers for fluid media such as gases or liquids often require a sealed connection through a connector. The detachable flange seal connection is widely used in the sealing connection of pipelines and vessels in the chemical, energy and mechanical fields because of its simple structure and easy operation. The traditional flange connection uses a fastening bolt to connect the two ports that need to be connected by flanges. A sealing element is placed on the sealing surface of the flange port. The fastening bolts also press the two end faces together and also press the sealing element tightly against the sealing surface along the axial direction of the flange.

An increase in the pressure of the fluid medium in the conduit and the storage container reduces the pressure acting on the conventional flanged sealing member, causing the sealing member to relax. This phenomenon is particularly evident in the connection of high-pressure, high-temperature pipes and vessels, which makes flange joint sealing difficult and fluid medium leakage. In order to ensure adequate sealing pre-stress during installation, it is necessary to use a sufficiently large fastening bolt. Large bolts require a corresponding increase in the diameter of the flange, and large-diameter flanges of the same thickness have the problem of insufficient rigidity. Therefore, the flange needs to increase the thickness while increasing the diameter, so the conventional high-pressure flange connector is very cumbersome. .

Summary of the invention

Therefore, it is necessary to provide a sealed connection device with reliable sealing performance.

A sealing connection device comprising: a first port member, a second port member, a first sealing member and a first locking member;

The first port member has a first connecting end, and a first flange is disposed at the first connecting end, the first flange has a first surface and a second surface spaced apart in the axial direction;

The second port member has a second connection end;

In the assembled state, the first connecting end is in abutment with the second connecting end to communicate the first port member with the second port member; the first locking member will be the first sealing member Pressing the first in the first port member axially Between the second surface of the flange and the first locking member, the first port member and the second port member are sealed from the outside by the first sealing member.

Optionally, a sealing connection device is further provided, comprising: a first port member, a second port member, a sleeve, a first sealing member, a second sealing member, a first locking member and a second locking member;

The first port member has a first connecting end, and a first flange is disposed at the first connecting end, the first flange has a first surface and a second surface spaced apart in the axial direction;

The second port member has a second connecting end, and a second flange is disposed at the second connecting end, the second flange has a third surface and a fourth surface spaced apart in the axial direction;

In the assembled state, the first connecting end is in abutment with the second connecting end, so that the first port member communicates with the inside of the second port member, and the first surface of the first flange is The third surface of the second flange is oppositely disposed, the sleeve is axially sleeved outside the first flange and the second flange, the first locking member and the first locking member a sleeve fixedly coupled to press the first sealing member axially between the second surface of the first flange and the first locking member, and abut the first sealing member In the inner annular surface of the sleeve, the second locking member is fixedly coupled to the sleeve, and the second sealing member is axially pressed against the fourth surface of the second flange Between the second locking members, and abutting the second sealing member against the inner annular surface of the sleeve, thereby passing the first port member and the second port member through the sealing member Is sealed from the outside world.

Alternatively, in the assembled state, the first sealing element between the first locking member and the second surface of the first flange can be further compressed in the axial direction by the internal medium pressure, and / Or the second sealing element between the second locking member and the fourth surface of the second flange can be further compressed axially by internal medium pressure.

Optionally, the first locking member and/or the second locking member are fixedly connected to the sleeve by bolts.

Optionally, the first locking member and/or the second locking member are lock nuts, and the sleeve is screwed.

Optionally, the first connection end of the first port member includes a first body and the first flange connected to each other, and the second connection end of the second port member includes an interconnected a second body and the second flange, the sleeve being disposed around the first flange, the first body, the second flange, and the second body in the assembled state, and The first locking member and the second locking member are fixedly coupled, the first locking member has a first outer portion away from the first flange and a first inner side adjacent to the first flange a first outer portion is fixedly coupled to the sleeve, the first inner portion is inserted between the first body and the sleeve, and the second locking member has a distance from the second protrusion a second outer portion of the rim and a second inner portion adjacent to the second flange, the second outer portion is fixedly coupled to the sleeve, and the second inner portion is inserted into the second body and the sleeve Between the tubes.

Optionally, the first locking member includes a first limiting leg extending from the first inner side portion, and the first inner side portion and the second surface of the first flange have The separation distance is used to limit the minimum value of the separation distance.

Optionally, the second locking member includes a second limiting leg extending from the second inner side portion, and the second inner side portion and the fourth surface of the second flange have The separation distance is used to limit the minimum value of the separation distance.

Optionally, the first inner side portion of the first locking member and/or the second surface of the first flange has a sloped surface, and the first sealing element abuts on the inclined surface.

Optionally, the second inner side portion of the second locking member and/or the fourth surface of the second flange have a sloped surface, and the second sealing member abuts on the inclined surface.

Optionally, a sealing connection device is further provided, comprising: a first port member, a second port member, a first sealing member and a first locking member; the first port member has a first connecting end, and The first connecting end is provided with a first flange, the first flange has a first surface and a second surface spaced apart in the axial direction; the second port member has a second connecting end, the second connection The end has an end surface and an inner annular surface; in the assembled state, the first connecting end is in abutment with the second connecting end, so that the first port member communicates with the inside of the second port member, the first flange The first surface is opposite to the end surface of the second connecting end, the first locking member is fixedly connected with the second port member, and the first sealing member is pressed axially in the Between the second surface of the first flange of the first port member and the first locking member, and abutting the first sealing member against the inner annulus of the second connecting end, such that The first port member and the second port member are sealed from the outside by the first sealing member Away.

Alternatively, in the assembled state, the first sealing element between the first locking member and the second surface of the first flange can be further compressed axially by internal medium pressure.

Optionally, the first locking member and the second port member are fixedly connected by bolts.

Optionally, the first locking member is a lock nut and is threadedly connected to the second port member.

Optionally, the first connection end of the first port member includes a first body and the first flange connected to each other, and the second connection end of the second port member includes an interconnected a second body and a fixing portion, the fixing portion is disposed around the first flange and the first body, and is fixedly connected with the first locking member, the first locking member a first outer portion remote from the first port member and a first inner portion adjacent to the first port member, the first outer portion being fixedly coupled to the fixing portion, the first inner portion being inserted into the Between the first body and the fixing portion.

Optionally, the first locking member includes a limiting leg extending from the second end, and the first locking member is spaced apart from the second surface of the first flange The limit foot is used to limit the minimum value of the separation distance.

Optionally, the first inner portion of the first locking member has a slope, and the first sealing member abuts on the inclined surface.

Optionally, the second surface of the first flange of the first locking member has a slope, and the first sealing element abuts on the inclined surface.

Optionally, the first inner portion of the first locking member has a connecting mechanism fixed to the first sealing member Connecting, the first locking member and the first sealing member form a complete part.

Optionally, the second inner portion of the second locking member has a connecting mechanism fixedly connected with the second sealing member to form the second locking member and the second sealing member A complete part.

Optionally, the first locking member and/or the second locking member are spliced by a plurality of detachable sub-assemblies.

Optionally, the first sealing element and the second sealing element are soft metal, graphite, polymer or composite filler, or non-metal O-ring, metal O-ring seal or C-ring seal ring.

Optionally, the sealing connection device further comprises an elastic spacer. In the assembled state, the first connecting end and the second connecting end are butted by the elastic spacer, so that the first port member and the first port member a second port member internally communicating, the first surface of the first flange being opposite the third surface of the second flange and spaced apart by the resilient spacer, the sleeve being axially Nested outside the elastic spacer, the first flange and the second flange.

Optionally, the elastic spacer is annular or C-shaped, and the elastic spacer is a unitary structure or is composed of a plurality of elastic sub-assemblies.

The present application is directed to the sealing connection device of the current high-temperature and high-pressure fluid medium pipe and the container, because the internal medium pressure is increased or the temperature change causes the sealing force to be slack and the leakage occurs, and a sealing connection device is proposed. a fixed connection between the locking member and the second port member, or a fixed connection between the first locking member and the second locking member and the sleeve, mainly for resisting the pressure of the medium inside the pipe or the container, therefore, The load required for the fixed connection is greatly reduced, and the size is reduced, so that the overall size of the entire connector is reduced and the weight is reduced. The sealed joint assembly prevents leakage of the seal under high medium pressure and can be used for sealed connections of high temperature and high pressure lines and/or vessels.

DRAWINGS

In order to clearly explain the technical solutions of the present application, the drawings to be used in the embodiments will be briefly described below. Obviously, the drawings in the following description are only some of the embodiments of the present application, and those skilled in the art can obtain other drawings according to the drawings without any creative work.

Figure 1 is a perspective view showing the structure of an embodiment of a sealed connecting device;

Figure 2 is a cross-sectional structural view showing an embodiment of the sealing and connecting device of Figure 1;

Figure 3 is a perspective view showing another embodiment of the sealed connecting device;

Figure 4 is a cross-sectional structural view showing an embodiment of the sealing and connecting device of Figure 3;

Figure 5 is a cross-sectional structural view showing another embodiment of the sealed connecting device;

Figure 6 is a cross-sectional structural view of an embodiment of a sealed connection device having a threaded connection;

Figure 7 is a cross-sectional structural view of another embodiment of a sealed connection device having a threaded connection;

Figure 8 is a cross-sectional structural view of another embodiment of a sealed connection device having a threaded connection;

Figure 9 is a cross-sectional structural view showing an embodiment of a sealing and connecting device of a locking member having a limiting leg;

Figure 10 is a perspective structural view of an embodiment of a locking member having a limit leg;

Figure 11 is a cross-sectional structural view showing another embodiment of the sealing and connecting device of the locking member having the limiting leg;

Figure 12 is a cross-sectional structural view showing another embodiment of the sealing and connecting device of the locking member having the limiting leg;

Figure 13 is a cross-sectional structural view showing an embodiment of a sealing and connecting device having a beveled locking member;

Figure 14 is an enlarged schematic view of the area A in Figure 13;

Figure 15 is a perspective structural view of an embodiment of a locking member having a bevel;

Figure 16 is a cross-sectional structural view showing another embodiment of a sealing and connecting device having a beveled locking member;

Figure 17 is a cross-sectional structural view showing another embodiment of a sealing and connecting device having a beveled locking member;

Figure 18 is a cross-sectional structural view of an embodiment of a sealed connection device having a beveled first port member;

Figure 19 is an enlarged schematic view of a region B in Figure 18;

Figure 20 is a cross-sectional structural view showing an embodiment of a sealing and connecting device in which the locking member and the sealing member are an integral part;

Figure 21 is an enlarged schematic view of a region C of Figure 20;

Figure 22 is a perspective schematic view of an embodiment of a locking member having a subassembly.

detailed description

In order to clearly explain the technical solutions of the present application, the technical solutions of the present application will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments are not intended to limit the application.

The present application provides a sealed connection for achieving an external sealed connection and internal fluid communication between devices to be connected, such as between a line and a line, between a line and a container, or between a container and a container.

Referring to FIG. 1 and FIG. 2, as an embodiment, the sealing connection device 10 includes a first port member 100, a second port member 200, a first sealing member 400, and a first locking member 300; the first port member 100 has a first connecting end 102, and a first flange 110 is disposed at the first connecting end 102, the first flange 110 has a first surface 112 and a second surface 114 spaced apart in the axial direction; the second port member 200 has The second connecting end 202 has a second end 202 having an end surface 222 and an inner annular surface 212. The second connection end 202 is used to interface with the first connection end 102.

The sealing connecting device 10 is of a detachable structure. In the assembled state, the first connecting end 102 is in abutment with the second connecting end 202, so that the first port member 100 communicates with the inside of the second port member 200, and the first surface of the first flange 110 The first locking member 300 is fixedly connected to the second port member 200 to press the first sealing member 400 in the axial direction on the first convex portion of the first port member 100. The second surface 114 of the rim 110 is between the first locking member 300 and the first sealing member 400 abuts the inner annular surface 212 of the second connecting end 202 such that the first port member 100 and the second port member 200 It is sealed from the outside by the first sealing member 400.

The primary function of the fixed connection between the first locking member 300 and the second port member 100 is no longer to apply sufficient pressure to the first sealing member 400, but only to the pressure of the medium inside the pipe or container, thus, first Locking member 300 and second The load required for the fixed connection between the port members 100 is greatly reduced, and the size is reduced, so that the overall size of the entire sealed joint device 10 is reduced and the weight is reduced. As can be seen from FIG. 2, when the medium pressure inside the connecting device increases, the increased medium pressure acts on the first sealing member 400 through the first port member 100, the second port member 200, and the first locking member 300. The pressure acting on the first sealing member 400 increases as the pressure of the internal medium increases. Therefore, the sealing connection device 10 can prevent the sealing force from being loosened under the high medium pressure, and can be used for the high temperature and high pressure pipeline and/or Or a sealed connection to the container. The conventional flange connection, when the internal medium pressure increases, the pressure acting on the first sealing member 400 is reduced.

In the assembled state, the first sealing member 400 is subjected to axial pressure to achieve an initial seal. The first locking member 300 has a spacing region with the first flange 110 of the first port member 100 for receiving the first sealing member 400. In some embodiments, such as the embodiment of Figures 1 and 2, the first locking member 300 and the first flange 110 are completely spaced apart, and when the pressure of the medium in the connected device increases, the medium pressure passes through the first The second surface 114 of the first flange 110 of the port member 100 acts on the first sealing member 400 such that the sealing force on the first sealing member 400 increases as the pressure of the medium increases, causing the first sealing member 400 to be axially Further compression, thereby preventing stress relaxation on the first sealing member 400 at high medium pressure, forming a self-tightening manner. It can be understood that in other embodiments, the first locking member 300 and the first flange 110 may not be completely separated by the first sealing member 400, and the first sealing member 400 is accommodated at intervals to achieve sealing. At the same time, a portion of the first locking member 300 is in contact with the surface of the first flange 110 to form a support.

Specifically, the first port member 100 has a first mounting end 106 for mounting on a device to be connected, such as a tubing or container. The first port member 100 can be an integrally formed tubing or ring having a first through bore 104 extending from the first mounting end 106 to the first connecting end 102. The second port member 200 has a second mounting end 206 for mounting on another device to be connected, such as a tubing or container. The second port member 200 can be an integrally formed tube or ring having a second through bore 204 that extends from the second mounting end 206 to the second connecting end 202. In the assembled state, the first through hole 104 communicates with the second through hole 204 to bring the fluid medium between the two devices to be connected into communication. There is a gap between the first surface 112 of the first connection end 102 and the end surface 222 of the second connection end 202, and the gap communicates with the first through hole 104 and the second through hole 204 inside, and needs to be sealed to be isolated from the outside. The edge near the outer side of the gap is the outer edge 12.

The first connecting end 102 and the second connecting end 202 may directly abut and contact, and the end surface 222 of the second connecting end 202 is in contact with the first surface 112 of the first connecting end 102 to form an annular connecting surface, and the connecting surface is close to the first The edges of a through hole 104 and the second through hole 204 are inner side edges, the outer edge is an outer side edge 12, and the outer side edge 12 is annular.

The first sealing member 400 is a ring member that is pressed against the inner ring surface 212 by the first locking member 300 and may be fitted to the outer edge 12 to form between the first port member 100 and the second port member 200. The sealing is such that the first through hole 104 and the second through hole 204 are isolated from the outside. The first sealing member 400 is an elastic member that is elastically deformable under pressure. The material of the first sealing member 400 may be selected according to specific working conditions, and may be, for example, soft metal, graphite, polymer or composite material or the like. The first sealing element 400 can be a non-metallic O-ring, a metal O-ring seal or a metal C-ring seal.

In the first port member 100, optionally, the first connecting end 102 includes a first body 120 and a first connected to each other. Flange 110. The first flange 110 is an annular structure, and the first flange 110 is disposed around the first body 120 and protrudes from the first body 120 toward the side of the first port member 100. In an embodiment, the first surface 112 and the second surface 114 are substantially parallel.

In the second port member 200, optionally, the second connecting end 202 includes a second body 220 and a fixing portion 210 that are connected to each other, and the fixing portion 210 protrudes from the second body 220 to form a stepped structure. The second body 220 is for connection with the first flange 110. Alternatively, the second body 220 abuts and contacts the first surface 112 of the first flange 110 in an assembled state. The fixing portion 210 is fixedly connected to the first locking member 300. The fixing portion 210 is an annular structure disposed around the second body 220. In the assembled state, the fixing portion 210 is disposed around the first flange 110, and the inner diameter of the fixing portion 210 Cooperating with the outer diameter of the first flange 110 enables the first flange 110 to move in the axial direction. In an embodiment, the securing portion 210 includes an inner annulus 212 that is in contact with the first sealing element 400.

The fixing portion 210 is also disposed around the first body 120 and is disposed at a first distance I from the first body 120 in a radial direction (ie, perpendicular to the extending direction of the first through hole 104).

The first locking member 300 can be an integral ring member. In the assembled state, the first locking member 300 is sleeved on the outside of the first port member 100, and is fixedly connected to the second port member 200 through the first locking member 300. The first port member 100 is at a radial upper limit. In an embodiment, the first locking member 300 can be inserted between the first body 120 and the fixing portion 210, for example, the insertion portion is substantially equal in size to the first distance I, and is coupled to the first body 120. The size fit between the fixing portions 210. In the present embodiment, the first locking member 300 and the first port member 100 are relatively movable in the axial direction (ie, the extending direction of the first through hole 104), so that the first port member 100 is raised in internal pressure. The pressure applied to the first sealing member 400 is increased. In an embodiment, the first locking member 300 has a first outer portion 302 away from the first connecting end 102 and a first inner portion 304 adjacent to the first connecting end 102, the first outer portion 302 and the second port member 200 The first inner portion 304 is inserted between the first body 120 and the fixed portion 210 by a fixed connection. The first inner side portion 304 may have a size that fits between the first body 120 and the fixed portion 210. In the assembled state, the first locking member 300 is axially spaced apart from the first flange 110 by a second distance II. Alternatively, the second distance II is smaller than the size when the first sealing member 400 is uncompressed, so that the first sealing member 400 is in a compressed state. The first locking member 300 and the second port member 200 can be connected by a fixing member 500, such as by screws or bolts. Correspondingly, the first inner portion 304 of the first locking member 300 has a through hole for the bolt to pass therethrough, and the fixing portion 210 of the second port member 200 has a screw hole for connecting with the bolt.

A conventional flange connector with a diameter of 45 mm and a medium pressure of 42 MPa has a flange diameter of 205 mm, a total thickness of 120 mm, a fastening bolt M30X4, and a total weight of about 18 kg. In a specific example of the sealing and connecting device 10 of the present embodiment, the maximum diameter is 115 mm, the total thickness is 59 mm, the fastening bolt M8X8, and the total weight is 3.5 kg. Compared with the conventional solution, the size is reduced by about half, and the weight is reduced to only 1/5.

Referring to FIG. 3 and FIG. 4, as another embodiment, a sealed connection device 10' is provided, including a first port member 100, a second port member 200, a sleeve 600, a first sealing member 400, and a second sealing member. The first locking member 300 has a first connecting end 102, and the first connecting end 102 is provided with a first flange 110. The first flange 110 has a first surface 112 and a second surface 114 spaced apart in the axial direction; the second port member 200 has a second connecting end 202, and the second connecting end 202 is provided with a second flange 210, The second flange 210 has a third surface 212 and a fourth surface 214 that are spaced apart in the axial direction. The second connection end 202 is used to interface with the first connection end 102.

The sealing connecting device 10' is a detachable structure. In the assembled state, the first connecting end 102 is in abutment with the second connecting end 202, so that the first port member 100 communicates with the inside of the second port member 200, and the first flange 110 is first. The surface 112 is disposed opposite to the third surface 212 of the second flange 210. The sleeve 600 is axially sleeved outside the first flange 110 and the second flange 210. The first locking member 300 and the sleeve The first sealing member 400 is axially pressed between the second surface 114 of the first flange 110 of the first port member 100 and the first locking member 300, and the first sealing member 400 is abutted. In the inner annulus 602 of the sleeve 600, the second locking member 340 is fixedly coupled to the sleeve 600, and the second sealing member 410 is axially pressed against the fourth surface 214 of the second flange 210 of the second port member 200. Between the second locking member 340 and the second sealing member 410 abutting the inner annular surface 602 of the sleeve 600, thereby passing the first port member 100 and the second port member 200 through the first sealing member 400 to the outside Sealed and isolated.

The primary function of the fixed connection between the first locking member 300 and the second locking member 340 and the sleeve 600 is no longer to apply sufficient pressure to the first sealing member 400 and the second sealing member 410, but only to the pipeline Or the pressure of the medium inside the container, therefore, the load required for the fixed connection between the first locking member 300 and the second locking member 340 and the sleeve 600 is greatly reduced, and the size becomes smaller, so that the entire sealing connection device 10 'The overall size is reduced and the weight is reduced. As can be seen from FIG. 4, when the internal medium pressure of the connecting device 10' is increased, the increased medium pressure acts on the first sealing member 400 through the first port member 100 and the first locking member 300, and passes through the first The two port member 200 and the second locking member 340 act on the second sealing member 410 such that the pressure acting on the first and second first sealing members 400, 410 increases as the internal medium pressure increases. Thus, the sealed connection device 10' is capable of preventing loosening of the sealing force under high medium pressure and can be used for sealing connections of high temperature and high pressure pipes and/or vessels. Conventional flange connections reduce the pressure acting on the sealing element as the internal medium pressure increases.

In the assembled state, the first and second first sealing members 400, 410 are subjected to axial pressure to effect initial sealing. The first locking member 300 has a spacing region with the first flange 110 of the first port member 100 for receiving the first sealing member 400. There is a spacing region between the second locking member 340 and the second flange 210 of the second port member 200 for receiving the second sealing member 410. In some embodiments, such as the embodiment of Figures 3 and 4, the first locking member 300 is completely spaced from the first flange 110, and the second locking member 340 and the second flange 210 are completely spaced apart. When the pressure of the medium in the connected device increases, the medium pressure acts on the first sealing member 400 through the second surface 114 of the first flange 110 of the first port member 100 and through the second projection of the second port member 200. The fourth surface 214 of the rim 210 acts on the second sealing element 410 such that the sealing force on the first sealing element 400 and the second sealing element 410 increases as the pressure of the medium increases, causing the first sealing element 400 and the second seal The element 410 is further compressed in the axial direction to prevent stress relaxation on the first sealing element 400 and the second sealing element 410 under high medium pressure, forming a self-tightening manner.

There is a gap between the first surface 112 of the first connection end 102 and the third surface 212 of the second connection end 202, the gap is in communication with the inner first through hole 104 and the second through hole 204, and needs to be sealed to be isolated from the outside. .

The first and second first sealing members 400, 410 are annular members that are pressed against the second surface 114 and the fourth surface 214 by the first and second first locking members 300, 340, respectively, and conform to the inner annulus 602 Thereby, a seal is formed between the first port member 100 and the second port member 200 to isolate the first through hole 104 and the second through hole 204 from the outside. The materials of the first and second first sealing members 400, 410 may be selected according to specific working conditions, and may be, for example, soft metal, graphite, polymer or composite materials. The first and second first sealing members 400, 410 may be non-metallic O-rings, metal O-ring seals or metal C-ring seals.

In the first port member 100, optionally, the first connecting end 102 includes a first body 120 and a first flange 110 that are connected to each other. The first flange 110 is an annular structure, and the first flange 110 is disposed around the first body 120 and protrudes from the first body 120 toward the side of the first port member 100. In an embodiment, the first surface 112 and the second surface 114 are substantially parallel.

In the second port member 200, optionally, the second connecting end 202 includes a second body 220 and a second flange 210 that are connected to each other. The second flange 210 is an annular structure, and the second flange 210 is disposed around the second body 220 and protrudes from the second body 220 toward the side of the second port member 200. In an embodiment, the third surface 212 and the fourth surface 214 are substantially parallel.

The sleeve 600 is an annular structure including an inner annulus 602. In the assembled state, the sleeve 600 is axially sleeved outside the first flange 110 and the second flange 120, and the inner diameter of the sleeve 600 matches the outer diameters of the first flange 110 and the second flange 120, so that The first flange 110 and the second flange 120 are movable in the axial direction. The sleeve 600 is for fixed connection with the first locking member 300 and the second locking member 340. The same inner annulus 602 is in contact with both the first and second first sealing elements 400, 410.

The sleeve 600 is also sleeved on a portion of the first body 120 and the second body 220, and is disposed at a first distance I from the first body 120 in a radial direction (ie, perpendicular to the extending direction of the first through hole 104). The two bodies 220 are disposed at a first distance I in a radial direction (ie, perpendicular to the direction in which the second through holes 204 extend).

The first locking member 300 and the second locking member 340 can respectively be an integral ring member. In the assembled state, the first locking member 300 is sleeved outside the first port member 100, and passes through the first locking member 300 and the sleeve. The barrel 600 is fixedly coupled such that the first port member 100 is at the upper radial limit. The second locking member 340 is sleeved on the outside of the second port member 200, and is fixedly connected to the sleeve 600 through the second locking member 340 such that the second port member 200 is at the upper radial limit. In an embodiment, the first locking member 300 can be inserted between the first body 120 and the sleeve 600, and the second locking member 340 can be inserted between the second body 220 and the sleeve 600. For example, the insertion portions of the first locking member 300 and the second locking member 340 are respectively radially sized to be substantially equal to the first distance I. In the present embodiment, the first locking member 300 and the first port member 100 are relatively movable in the axial direction (ie, the extending direction of the first through hole 104 and the second through hole 204), so that the first port member 100 The pressure applied to the first sealing member 400 increases as the internal pressure increases, and the second locking member 340 and the second port member 200 can move relative to each other such that the second port member 200 faces the second when the internal pressure rises. The pressure exerted by the sealing element 410 is increased. In an embodiment, the first locking member 300 has a first outer portion 302 away from the first connecting end 102 and a first inner portion 304 adjacent to the first connecting end 102, and the second locking member The 340 has a second outer portion 342 that is away from the second connecting end 202 and a second inner portion 344 that is adjacent to the second connecting end 202. The first outer portion 302 and the second outer portion 342 are respectively fixedly coupled to the two ends of the sleeve 600, the first inner portion 304 is inserted between the first body 120 and the sleeve 600, and the second inner portion 344 is inserted into the second body 220 and the sleeve. Between the barrels 600. The first inner side portion 304 can have a size that mates with the first body 120 and the sleeve 600. The second inner side portion 344 can have a size that mates with the second body 220 and the sleeve 600. In the assembled state, the first locking member 300 is axially spaced apart from the first flange 110 by a second distance II, and the second locking member 340 is axially spaced apart from the second flange 210 by a second distance II. Optionally, the second distance II is smaller than the size when the first and second first sealing elements 400, 410 are not compressed, respectively, so that the first and second first sealing elements 400, 410 are in a compressed state. The first and second first locking members 300, 340 and the sleeve 600 may be connected by the first fixing member 500 and the second fixing member 510, respectively, for example, by screws or bolts. Correspondingly, the first outer side portion 302 of the first locking member 300 and the second outer side portion 342 of the second locking member 340 have through holes for the bolts to pass through, and the sleeve 600 has a screw hole for connecting with the bolts. .

The sleeve 600 converts the surface connection between the conventional flanges into a body connection manner between the first locking member 300 and the second locking member 340, respectively, which greatly improves the overall sealing connection device 10'. Sexuality enhances torsion, bending and vibration resistance, and is especially suitable for sealing connections in strong vibration environments.

A conventional flange connector with a diameter of 45 mm and a medium pressure of 42 MPa has a flange diameter of 205 mm, a total thickness of 120 mm, a fastening bolt M30X4, and a total weight of about 18 kg. In a specific example of the sealing connecting device 10' of the present embodiment, the maximum diameter is 115 mm, the total thickness is 80 mm, the fastening bolt M8X8, and the total weight is 4.5 kg. Compared with the conventional solution, the size is reduced by about half, and the weight is reduced to Only 1/4.

Referring to FIG. 5, as an embodiment, the sealing connection device 10" is substantially the same as the above-mentioned sealing connection device 10', except that the elastic spacer 700 is further included, and the second connection end 202 is elastically spaced from the first connection end 102. The piece 700 is docked.

The sealing connection device 10" is a detachable structure. In the assembled state, the elastic spacer 700 is disposed between the first connecting end 102 and the second connecting end 202, and the first connecting end 102 and the second connecting end 202 pass the elastic spacer 700. Docking, the first port member 100 is communicated with the second port member 200, and the sleeve 600 is axially sleeved outside the elastic spacer 700, the first flange 110 and the second flange 210.

The forces of the first sealing element 400 and the second sealing element 410 are derived from the self-tightening force generated by the pressure of the medium in the connected device, and the pressure generated by the elastic spacer 700, and the two forces are inversely proportional, ie, when When the medium pressure is increased, since the distance between the first and second port members 100, 200 is increased, the force generated by the elastic spacer 700 is reduced, and vice versa, so the elastic spacer 700 of a suitable elastic modulus is selected. The force acting on the first and second sealing members 400, 410 can be made to become a substantially constant force, thereby improving the sealing reliability of the sealed connecting device 10".

The elastic spacer 700 may be specifically disposed between the first surface 112 of the first connection end 102 and the third surface 212 of the second connection end 202. The first surface 112 of the first connection end 102 and the third surface 212 of the second connection end 202 are in contact with the elastic spacer 700, respectively. The elastic spacer 700 has a through hole that communicates with the first through hole 104 and the second through hole 204, respectively. Specifically, it may be a ring member or a C-shaped member. The annular or C-shaped elastic spacer 700 may be a unitary structure or may be formed by splicing a plurality of elastic sub-assemblies. The elastic spacer 700 can be elastically deformed by external force compression, and is disposed between the first connecting end 102 and the second connecting end 202, and has an adjustable and compressible elastic interval when the sealing connecting device 10" is attached and detached. The presence of the member 700 not only makes the sealing connection device 10" easier to install and disassemble, but also reduces the requirement for the fitting accuracy of the various components. For example, the elastic spacers 700 of different thicknesses may be selected according to the distance between the first port member 100 and the second port member 200 at the site, thereby facilitating fine adjustment of the thickness of the elastic spacers 700 or superimposing a plurality of elastic layers. The spacer 700 is adapted to the distance between the first port member 100 and the second port member 200 without adjusting the distance between the first port member 100 and the second port member 200, thereby greatly facilitating on-site installation. And disassembly work.

In the assembled state, optionally, the inner diameter of the sleeve 600 also matches the outer diameter of the elastic spacer 700, and the inner diameter of the elastic spacer 700 is equal to the diameter of the first through hole 104 and the second through hole 204.

In order to reduce the size and weight, for the small-diameter (inner diameter ≤ 26 mm) sealing connection device 10, 10', 10", the first port member 100 and the second port member 200 can be realized by a threaded locking member. For example, the first locking member 300 and/or the second locking member 340 may be a lock nut.

Referring to FIG. 6, in an embodiment of the sealing and connecting device 10, the first locking member 300 is inserted between the first body 120 and the fixing portion 210, and the surfaces of the first inner portion 304 and the fixing portion 210 are in contact with each other. Thread 310. It can be understood that in other embodiments, the first locking member 300 can be disposed around the outside of the fixing portion 210 (not shown), and the surface contacting the fixing portion 210 has a matching thread 310. The first locking member 300 connected by the thread 310 is no longer connected to the second port member 200 by the fixing member 500, so that the sealing connecting device 10 has a small size and weight.

Referring to Figures 7 and 8, in an embodiment of the sealed coupling devices 10' and 10", the first locking member 300 and/or the second locking member 340 and the sleeve 600 can be coupled by threads 310. The first inner portion 304 of the first locking member 300 and/or the second inner portion 344 of the second locking member 340 and the surface of the sleeve 600 that are in contact with each other have mating threads 310. The first one connected by the thread 310 The locking member 300 and/or the second locking member 340 need not be connected to the sleeve 600 by the fixing member 500, so that the sealing connecting devices 10' and 10" have a small size and weight.

Referring to Figures 9 through 12, in an embodiment, the temperature and/or pressure of the media within the conduit and/or container may be unstable and constantly changing. The first locking member 300 and/or the second locking member 340 may include a limiting leg 320. The limiting leg 320 of the first locking member 300 protrudes from the first inner portion 304, and the second locking member 340 is limited. The leg 320 extends from the second inner side portion 344. In the initial sealed state after assembly, the first sealing member 400 is compressed by the first locking member 300 by an initial elastic deformation to form an initial seal. The limiting legs 320 may be disposed on or spaced apart from the first flange 110, and are determined according to actual working conditions. When the limit leg 320 is spaced from the first flange 110 in the initial sealed state after assembly, when the internal medium pressure is increased, the medium pressure acts on the first sealing member 400 through the first flange 110, so that the first The pressure on the sealing member 400 increases while the gap between the limit leg 320 and the second surface 114 of the first flange 110 becomes smaller until it is zero. At this time, even if the medium pressure continues to increase, the deformation of the first sealing member 400 remains substantially unchanged. Due to the presence of the limit legs 320, the maximum amount of deformation of the first sealing element 400 remains substantially fixed, avoiding excessive deformation. After the abutment between the limiting leg 320 and the second surface 114 of the first flange 110, the force applied to the first sealing element 400 is substantially constant, avoiding the occurrence of internal pressure increase or frequent drastic changes. Excessive deformation and slack of the first sealing member 400. Since the first sealing member 400 is still compressed by the first locking member 300, even if the axial movement is slightly caused by the gap between the first port member 100 and the second port member 200, the sealing effect is not affected. Compared with the conventional flange connection, the requirement of the deformation resistance rigidity of the fixing member 500 and the entire connecting device 10 under high pressure and ultrahigh pressure conditions is reduced. Therefore, the entire connecting device is small in size and light in weight. For the second sealing member 410, the limiting legs 320 of the second locking member 340 also have the same arrangement and function, and will not be described again. The limiting leg 320 of the first locking member 300 limits the minimum distance between the first inner portion 304 of the first locking member 300 and the second surface 114 of the first flange 110, and the second locking member The limit foot 320 of 340 limits the minimum distance of the separation between the second inner portion 344 of the second locking member 340 and the fourth surface 214 of the second flange 210.

Referring to FIGS. 13-15, in an embodiment, the first inner portion 304 of the first locking member 300 has a ramp 306 and a plane 308. A first sealing element 400 is provided in the space between the ramp 306 and the first flange 110, such as a non-metallic O-ring, a metal C-ring seal or a metal O-ring seal. When the plane 308 is spaced from the first flange 110, the medium pressure acts on the first sealing element 400 through the second surface 114 of the first flange 110 of the first port member 100, sealing the first sealing element 400. The force increases as the pressure of the medium increases, causing the first sealing member 400 to be further compressed in the axial direction, thereby preventing stress relaxation on the first sealing member 400 at high medium pressure, forming a self-tightening manner. When the plane 308 and the first flange 110 abut each other in the initial assembled state, the pressure of the first sealing member 400 is substantially unchanged thereafter, and the first seal can be prevented from being caused by an increase in internal pressure or a frequent change. The force on the element 400 changes to avoid slack in the first sealing element 400.

Referring to FIGS. 16-17, the second inner portion 344 of the second locking member 340 can also have a ramp 346 and a flat surface 348 with the second sealing element abutting the ramp 346.

Referring to FIGS. 18-19, in an embodiment, the second surface 114 of the first flange 110 has a slope 1142 and a plane 1144. The plane 1144 and the first inner portion 304 of the first locking member 300 may be spaced apart or offset from each other. by. A first sealing element 400 is disposed in the space between the ramp 1142 and the first inner portion 304 of the first locking member 300, such as a non-metallic O-ring, a metal C-ring seal, or a metal O-ring seal.

Similarly, the fourth surface 214 of the second flange 210 may also have a sloped surface and a flat surface in which the second sealing member 410 is disposed in a space between the inclined surface and the second inner side portion 344 of the second locking member 340.

The above-described embodiments of FIGS. 13 to 19 can reduce the machining accuracy and assembly difficulty of the parts, the first and second sealing members 400, 410 and the beveled first flange 110, the second flange 210, the first inner portion 304 or The second inner portion 344 is used in combination to obtain a simple, effective and reliable seal.

In one embodiment, the first locking member 300 is fixedly coupled to the first sealing member 400 to form an integral part, so that the first sealing member 400 and the first locking member 300 can be simultaneously disassembled, thereby increasing assembly convenience. The first inner portion 304 of the first locking member 300 may have a coupling mechanism, such as the mounting groove 330, such that the first sealing member 400 is caught in the mounting groove 330 to be fixedly coupled to the first inner portion 304.

Similarly, the second locking member 340 and the second sealing member 410 can also be fixedly connected in the same manner to form an integral part.

Referring to FIGS. 20 to 21, in an embodiment, the first flange 110 has a slope 1142. In the assembled state, the first inner portion 304 of the first locking member 300 and the plane 1144 of the first flange 110 may mutually The first sealing member 400 that is coupled to the first inner portion 304 of the first locking member 300 is spaced apart or abutted by the slope 1142 of the first flange 110. In one embodiment, the first sealing element 400 of the sealed connection device 10 is pressed against the inner annulus 212 of the second connection end 202, sealing the first port member 100 and the second port member 200 from the outside through the first sealing member 400. isolation. In another embodiment, the first sealing element 400 of the sealing joint 10' or 10" is pressed against the inner annulus 602 of the sleeve 600. Similarly, the second flange 210 may also have a beveled surface.

Referring to FIG. 13, in order to increase the ease of assembly and disassembly of the sealing connecting device 10, 10', 10", in an embodiment, the first locking member 300 and/or the second locking member 340 are in a block structure, including A plurality of sub-assemblies 360, which can be spliced into the first and second locking members 300, 340 of the complete annular structure in other embodiments.

Compared with the conventional flange connection method, in the embodiment of the present invention, since the pressure on the sealing element is mainly from the internal medium pressure itself under high pressure, or a fixed value does not change with the medium pressure change, the first locking member and the first locking member are The fixed connection between the second port members, or the primary function of the fixed connection between the first and second locking members and the sleeve, is no longer to apply sufficient pressure to the sealing member, but only to the interior of the pipe or container The medium pressure, therefore, the load on the connector is greatly reduced, and the size is reduced, so that the overall size of the entire connector is reduced and the weight is reduced. Since the elastic modulus of the aluminum alloy is only about 1/3 of that of the steel, the effect of reducing the volume and weight reduction is particularly remarkable for the use of the aluminum connecting device. The embodiment of the invention completely solves the problem that the traditional flange connection has stress relaxation of the sealing element due to high internal medium pressure, and can realize reliable sealing connection under high pressure and ultra high pressure. The second distance between the inner side portion of the locking member and the flange has a minimum connection mode, which can effectively solve the problem of medium leakage which occurs after the sealing element is excessively compressed due to temperature and pressure changes.

The sealed connection device is particularly suitable for use in high pressure, high temperature media, variable temperature, pressure medium pipes and sealed joints between containers, such as aerospace and deep sea.

The above-mentioned embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims (15)

A sealing connecting device, comprising: a first port member, a second port member, a first sealing member and a first locking member; The first port member has a first connecting end, and a first flange is disposed at the first connecting end, the first flange has a first surface and a second surface spaced apart in the axial direction; The second port member has a second connection end; In the assembled state, the first connecting end is in abutment with the second connecting end to communicate the first port member with the second port member; the first locking member will be the first sealing member Pressing axially between the second surface of the first flange of the first port member and the first locking member to pass the first port member and the second port member The first sealing element is sealed from the outside. The sealing connection device according to claim 1, further comprising a sleeve, a second sealing member and a second locking member, wherein the second port member is provided with a second flange at the second connecting end The second flange has a third surface and a fourth surface spaced apart in the axial direction; In the assembled state, the first surface of the first flange is disposed opposite to the third surface of the second flange; the sleeve is axially sleeved on the first flange and the Outside the second flange; the first locking member is fixedly coupled to the sleeve and abuts the first sealing member against an inner annulus of the sleeve; the second locking member Fixedly coupled to the sleeve, axially pressing the second sealing member between the fourth surface of the second flange and the second locking member, and causing the second seal The element abuts against the inner annulus of the sleeve. The sealing connection device according to any one of claims 1 to 2, wherein the first locking member and/or the second locking member are fixedly connected to the sleeve by bolts, or The first locking member and/or the second locking member are locking nuts which are screwed to the sleeve. The sealing connection device according to claim 1, wherein the second connecting end has an end surface and an inner annular surface; In the assembled state, the first surface of the first flange is disposed opposite the end surface of the second connecting end; the first locking member is fixedly coupled to the second port member, and the The first sealing element abuts the inner annulus of the second connecting end. The sealing connection device according to any one of claims 1 to 4, wherein the first locking member is fixedly connected to the second port member by bolts; or the first locking member is a lock A tightening nut is threadedly coupled to the second port member. A sealing joint device according to any one of claims 1 to 5, wherein in the assembled state, said said first locking member and said second surface of said first flange The first sealing element can be internally interposed The mass pressure is further compressed, and/or the second sealing element between the second locking member and the fourth surface of the second flange is further compressible axially by internal medium pressure. The sealing connection device according to any one of claims 1 to 6, wherein the first locking member comprises a first limiting leg, the first locking member and the first flange There is a separation distance between the second surfaces, and the first limit leg is used to limit the minimum value of the separation distance. The sealing connection device according to any one of claims 1 to 7, wherein the second locking member comprises a second limiting leg, the second locking member and the second flange There is a separation distance between the fourth surfaces, and the second limit leg is used to limit the minimum value of the separation distance. The sealing connection device according to any one of claims 1 to 8, wherein the first inner side portion of the first locking member and/or the second surface of the first flange has a slope The first sealing element abuts on the inclined surface. The sealing connection device according to any one of claims 1 to 9, wherein the second inner side portion of the second locking member and/or the fourth surface of the second flange has a slope The second sealing element abuts on the inclined surface. The sealing connection device according to any one of claims 1 to 10, characterized in that the first inner side portion of the first locking member and/or the second inner side portion of the second locking member has a connection a mechanism fixedly coupled to the first sealing element and/or the second sealing element, respectively, such that the first locking member forms a complete part with the first sealing element and/or the second lock The fastener forms a complete part with the second sealing element. The sealing connection device according to any one of claims 1 to 11, wherein the first locking member and/or the second locking member are formed by splicing a plurality of detachable sub-assemblies . The sealing connection device according to any one of claims 1 to 12, wherein the first sealing member and/or the second sealing member are soft metal, graphite, polymer or composite filler, or It is a non-metallic O-ring, a metal O-ring seal or a C-ring seal. The seal connection device according to any one of claims 1 to 13, further comprising an elastic spacer, the first connection end and the second connection end being butted by the elastic spacer. The sealing connection device according to any one of claims 1 to 14, wherein the elastic spacer is annular or C-shaped, and the elastic spacer is a unitary structure or is composed of a plurality of elastic sub-assemblies. .

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