CN216382999U - Axial seal structure of joint - Google Patents

Abstract

The utility model relates to the technical field of pipeline connecting devices, and discloses an axial sealing structure of a joint, which comprises a tubular mounting head, a tubular front baffle ring, a guide post and a bidirectional sealing device, wherein the front baffle ring comprises a connecting section and a guide section, the inner diameter of the guide section is smaller than that of the connecting section, the connecting section of the front baffle ring is axially and hermetically connected with the mounting head, the guide post is arranged in the guide section of the front baffle ring, the sealing device is arranged in a pipe body connected with the mounting head and the front baffle ring, and the sealing device, a convex structure arranged on the inner surface of the mounting head and the left side end face of the guide section of the front baffle ring jointly form a sealing cavity. The double-valve-core sealing structure is adopted, leakage is avoided, double-layer sealing is completed in one space, the valve body is smaller, energy loss is reduced, and the use is more convenient; meanwhile, the two valve cores are sealed and have asynchronous difference, and impurity dirt in the pipeline can form a static state along with the closing of the rear valve core, so that the cleanness of the sealing end face is kept.

Description

Axial seal structure of joint

Technical Field

The utility model relates to the technical field of pipeline connecting devices, in particular to an axial sealing structure of a joint.

Background

Due to the consideration of safety and other factors, most of the field-used tools in modern heavy industry are changed from electric to pneumatic. For this reason, a large number of gas supply systems need to be used to meet different production needs. For example: such energy devices are needed in industries such as smart manufacturing, automotive manufacturing, and ship repair. During the fluid transportation process, the pipeline is connected to the use port, and then the pipeline is branched from the use port to be connected to the equipment. The sealing modes of fluid connection include spherical sealing, conical surface sealing and plane sealing, when the density of fluid is small and the permeability is strong, the leakage phenomenon is easy to occur, and particularly the leakage phenomenon in gas connection is more obvious.

Therefore, according to the situation, through a plurality of research experiments, a novel upgrading structure of the sealing connection joint is developed to meet the defects of the existing fluid pipeline connection.

Disclosure of Invention

The purpose of the utility model is: a two-way sealing joint structure having a compact structure is provided.

In order to achieve the purpose, the utility model provides an axial sealing structure of a joint, which comprises a tubular mounting head, a tubular front baffle ring, a guide post and a bidirectional sealing device, wherein the front baffle ring comprises a connecting section and a guide section, the inner diameter of the guide section is smaller than that of the connecting section, the connecting section of the front baffle ring is axially and hermetically connected with the mounting head, the guide post is arranged in the guide section of the front baffle ring, the sealing device is arranged in a pipe body formed by the mounting head and the front baffle ring, and the sealing device, a convex structure arranged on the inner surface of the mounting head and the end surface of the guide section of the front baffle ring form a sealing cavity together.

Preferably, the sealing device comprises a first vent valve, a second vent valve, a first spring, a second spring, a connecting column, a first blocking piece and a second blocking piece.

The connecting and installing head is positioned at one side of the front retaining ring, the convex structure arranged on the inner surface of the installing head is a first convex ring, the first vent valve is abutted against the first convex ring from the outside of one side of the sealing cavity, the first vent valve is connected with a connecting column along the direction in the sealing cavity, one side of the connecting column close to the first vent valve is sleeved with a first retaining sheet which can axially move along the connecting column and is limited in the sealing cavity, and one side of the connecting column far away from the first vent valve is fixedly provided with a second retaining sheet; the second ventilation valve is located between the front retaining ring guide section and the connecting column and is abutted against the end face of the front retaining ring guide section, the two ends of the first spring are respectively abutted against the first retaining piece and the second ventilation valve, the second spring is located inside the first spring, and the two ends of the second spring are respectively abutted against the first retaining piece and the second retaining piece.

Preferably, an intermediate connecting ring is arranged in the mounting head, the outer wall of the intermediate connecting ring is connected with the inner wall of the mounting head in a sealing manner, and the first convex ring is arranged on the inner wall of the intermediate connecting ring.

Preferably, a first limiting boss is arranged between the first convex ring and the first blocking piece, and the first blocking piece abuts against the end face of the first limiting boss.

Preferably, first breather valve is a centrosymmetric's rotator, and first breather valve includes first valve body back end, first valve body interlude and first valve body anterior segment, and first valve body back end diameter is greater than the internal diameter of first bulge loop, and first valve body anterior segment diameter is less than the internal diameter of first bulge loop, and first valve body interlude is equipped with first recess, sets up first sealing washer in the first recess, and the external diameter of first sealing washer is greater than the internal diameter of first bulge loop.

Preferably, the second breather valve is a centrosymmetric rotator, including spring fixed station, second valve body back end, second valve body interlude and second valve body anterior segment, the one end of first spring cup joints on the spring fixed station so that carry on spacingly to the radial movement of first spring, and second valve body back end diameter is greater than the internal diameter of preceding fender ring guide section, second valve body anterior segment diameter with the diameter of guide post is the same, second valve body anterior segment with the guide post is connected, and second valve body interlude is equipped with the second recess, sets up the second sealing washer in the second recess, and the external diameter of second sealing washer is greater than the internal diameter of preceding fender ring guide section.

Preferably, the second separation blade is a locknut in threaded connection with the connecting column, and the connecting column is provided with an external thread in matched connection with the locknut.

Preferably, the first convex ring is provided with a bevel end and a plane end, the plane end forms a cylindrical space for accommodating the first valve body front section, and the bevel end forms a truncated cone-shaped space for accommodating the first sealing ring.

Preferably, the intermediate connecting ring comprises an external thread connecting section and a limiting convex ring, and the inner surface of the mounting head is provided with an internal thread matched with the external thread connecting section and a second limiting boss abutted against the limiting convex ring.

Preferably, the mounting head and the front baffle ring are in threaded connection, and a third sealing ring is arranged on a contact surface at the tail end of the threaded connection.

Compared with the prior art, the axial sealing structure of the joint provided by the embodiment of the utility model has the beneficial effects that: the double-valve-core sealing structure is adopted, leakage is fundamentally avoided, double-layer sealing is completed in one space, the valve body is smaller, energy loss is reduced, and the use is more convenient; meanwhile, the two valve cores are sealed and have asynchronous difference, and impurity dirt in the pipeline can form a static state along with the closing of the rear valve core, so that the cleanness of the sealing end face is kept.

The sealing contact surface of the embodiment of the utility model has the following advantages:

the sealing ring of the connecting end is provided with a groove, so that the sealing ring is supported when the connection is extruded; the design of the inclined end of the contact surface of the first vent valve can easily extrude and deform the sealing ring to form a closed space; the groove on the axial connecting end surface of the second breather valve can effectively prevent the sealing ring from being loosened due to impact of fluid when the sealing ring is opened and closed; when in connection and sealing, the sealing space is formed into a shape similar to a triangle, and the sealing ring is extruded and sealed, so that the space similar to the triangle prevents the sealing ring from being damaged due to extrusion transition, and can reduce the leakage phenomenon caused by the extension of the sealing ring due to the overlarge pressure in the pipeline; due to the change of the sealing structure, the common sealing connection with medium and low pressure can be completed by hands to achieve the sealing effect.

Drawings

FIG. 1 is a schematic diagram of one of the prior art configurations;

FIG. 2 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 4 is a schematic view of a sealing device according to an embodiment of the present invention;

FIG. 5 is an enlarged partial schematic view of FIG. 4;

in the figure, 1, a mounting head; 2. a front baffle ring; 3. a guide post; 4. sealing the cavity; 5. a sealing device; 6. a first convex ring; 7. a first seal ring; 8. a middle connecting ring; 9. a first limit boss; 10. a third seal ring; 11. a second seal ring; 12. a second limit boss;

501. a first vent valve; 502. a second vent valve; 503. a first spring; 504. a second spring; 505. connecting columns; 506. a first baffle plate; 507. a second baffle plate;

5011. a first valve body rear section; 5012. a first valve body front section;

5021. a spring fixing table; 5022. a second valve body rear section; 5023. a second valve body intermediate section; 5024. a second valve body front section; 5023a and a second groove

601. A beveled end; 602. a planar end;

801. an external thread connecting section; 802. a limit convex ring.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "disposed on" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured" to, or "fixedly coupled" to another element, it can be removably secured or non-removably secured to the other element. When an element is referred to as being "connected," "pivotally connected," to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," "up," "down," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

The original axial sealing joint is internally provided with a single-valve type sealing structure, as shown in figure 1, the axial sealing joint protected by the utility model is structurally optimized on the basis of the single-valve type sealing structure in the original joint, a sealing valve is additionally arranged at the other port in a single sealing cavity, so that the sealing cavity of the valve body is sealed twice, the axial length of the sealing joint is kept unchanged, the sealing effect is doubled, and the precision and the economy of a product are better reflected.

Example one

As shown in fig. 2, the axial sealing structure of a joint according to the preferred embodiment of the present invention includes a tubular mounting head 1, a tubular forward retainer 2, a guide post 3, and a bidirectional sealing device 5. Keep off ring 2 including linkage segment and direction section before, the direction section internal diameter is less than the linkage segment internal diameter, preceding keep off ring 2 the linkage segment with 1 axial seal of installation head is connected, guide post 3 sets up in the direction section of keeping off ring 2 before, and installation head 1 keeps off ring 2 threaded connection before from the left side, and the left safety cover of installation head 1 keeps off ring 2 before will hold wherein. The inner surface of the mounting head 1 is provided with a first bulge loop 6.

As shown in fig. 4, the sealing device 5 includes a first vent valve 501, a second vent valve 502, a first spring 503, a second spring 504, a connecting column 505, a first stopper 506 and a second stopper 507. The sealing device 5 is arranged in the pipe body connected with the mounting head 1 and the front retaining ring 2, and the sealing device 5, the first convex ring 6 on the inner surface of the mounting head 1 and the left end face of the guide section of the front retaining ring 2 jointly form a sealing cavity 4.

The first vent valve 501 abuts against the first convex ring 6 from the outside of the left side of the sealed cavity 4, the first vent valve 501 is connected with the connecting column 505 along the direction in the sealed cavity 4, the left side of the connecting column 505 is sleeved with a first baffle 506 capable of axially moving along the connecting column 505, the right side of the first convex ring 6 is provided with a first limiting boss 9 positioned on the left side of the first baffle 506, the first baffle 506 abuts against the right end face of the first limiting boss 9 leftwards, and the first baffle 506 moves rightwards relative to the connecting column 505 and is limited by the first limiting boss 9.

First breather valve 501 is a centrosymmetric rotator, and first breather valve 501 includes first valve body back end 5011, first valve body interlude and first valve body anterior segment 5012, and first valve body back end 5011 diameter is greater than the internal diameter of first bulge loop 6, and first valve body anterior segment 5012 diameter is less than the internal diameter of first bulge loop 6, and first valve body interlude is equipped with first recess (not shown), sets up first sealing washer 7 in first recess (not shown), and the external diameter of first sealing washer 7 is greater than the internal diameter of first bulge loop 6. The first male ring 6 has a beveled end 601 and a flat end 602, the flat end 602 forming a cylindrical space for receiving the first valve body front section 5012, and the beveled end 601 forming a frustoconical space for receiving the first sealing ring 7. As shown in fig. 5, in the sealing structure design of the first vent valve 501, a stable sealing surface is formed on the left side of the sealing chamber 4 by the structural combination of the beveled end 601 with the first sealing ring 7, the flat end 602 with the first valve body front section 5012.

Second breather valve 502 is a centrosymmetric rotator, including spring fixed station 5021, second valve body back end 5022, second valve body interlude 5023 and second valve body anterior segment 5024, second valve body back end 5022 diameter is greater than the internal diameter of preceding fender ring 2 guide section, second valve body anterior segment 5024 diameter is the same with guide post 3's diameter, second valve body anterior segment 5024 is connected with guide post 3, second valve body interlude 5023 is equipped with second recess 5023a, set up second sealing washer 11 in the second recess 5023a, the external diameter of second sealing washer 11 is greater than the internal diameter of preceding fender ring 2 guide section. The second groove 5023a that the middle section 5023 of the second valve body is provided is used for installing and fixing the second sealing ring 11, when the second sealing ring 11 is extruded and sealed, the outer diameter protrudes out of the second valve body rear section 5022 of the second sealing ring 11 to provide a supporting and sealing effect, and meanwhile, the shaft can effectively prevent the second sealing ring 11 from being loosened due to fluid impact when the second air vent valve 502 is opened and closed.

The right side of the connecting column 505 is fixedly provided with a second blocking piece 507, the second vent valve 502 is positioned on the right side of the connecting column 505, the second vent valve 502 abuts against the left side end face of the guide section of the front blocking ring 2 rightwards, the left end and the right end of the first spring 503 are respectively abutted against the right side of the first blocking piece 506 and the left side of the second vent valve 502, the second spring 504 is positioned inside the first spring 503, and the left end and the right end of the second spring 504 are respectively abutted against the right side of the first blocking piece 506 and the left side of the second blocking piece 507. The right end of the first spring 503 is fitted over the spring holder 5021 to limit the radial movement of the first spring 503.

In a preferred embodiment, the second stopper 507 is a locknut, and is in threaded connection with the right end of the connection column 505, and the right end of the connection column 505 is provided with an external thread in fit connection with the locknut. The mode that adopts threaded connection makes the installation simple, and locknut can guarantee to connect firmly, is a mode that the field is commonly used, the commonality is good and convenient processing. The second stop 507 also adopts the common technical means such as a snap spring.

The mounting head 1 and the front retaining ring 2 are in threaded connection, the connecting section of the front retaining ring 2 is provided with an external thread, the connecting surface of the mounting head 1 and the front retaining ring 2 is provided with an internal thread, the tail end of the external thread of the connecting section of the front retaining ring 2 is provided with a third sealing ring 10, and the third sealing ring 10 forms an auxiliary sealing surface during threaded connection.

The sealing connecting joint of the embodiment of the utility model forms the sealing space into a shape similar to a triangle, and as shown in figure 2, the sealing ring is extruded and sealed, the space similar to the triangle prevents the sealing ring from being damaged due to extrusion transition, and can reduce the resistance to overlarge pressure in a pipeline, so that the sealing ring is expanded to eliminate the possibility of leakage.

The sealing joint of the present embodiment performs compression sealing on the sealing ring of each joint surface by three-surface acting force. The third sealing ring 10 can be extruded and deformed easily by the acting force of the screw thread to form a closed space; the second vent valve 502 is pushed tightly to abut against the front baffle ring 2 by the acting force of the first spring 503 which is pushed tightly rightwards, and the second sealing ring 11 is extruded and deformed to seal; the first ventilation valve 501 is pulled tight against the beveled end 601 on the right side of the first male ring 6 by the force of the second spring 504 pulling to the right, and is sealed by the first sealing ring 7 being pressed and deformed. After the mounting head 1 is in threaded connection with the front retaining ring 2, the sealing action in the sealing joint is automatically realized through the spring structure, the sealing effect can be achieved through manual operation of a person, and the sealing joint has better sealing performance compared with common medium-pressure and low-pressure sealing connecting pieces.

Example two

The difference from the first embodiment is that, as shown in fig. 3, an intermediate connection ring 8 is provided in the mounting head 1 according to the first embodiment of the present invention, the outer wall of the intermediate connection ring 8 is connected with the inner wall of the mounting head 1 in a sealing manner, and the first convex ring 6 is provided on the inner wall of the intermediate connection ring 8. The middle connecting ring 8 consists of an external thread connecting section 801 at the left side and a limiting convex ring 802 at the right side, and the inner surface of the mounting head 1 is provided with an internal thread matched with the external thread connecting section 801 and a second limiting boss 12 abutted against the limiting convex ring 802.

The sealing structure of the joint is installed according to the following steps:

1. sleeving the middle connecting ring 8, the first baffle 506, the second spring 504, the second baffle 507 and the first spring 503 into the connecting column 505 of the first vent valve 501 from right to left in sequence;

2. loading the assembly in the first part into the mounting head 1 from right to left, screwing the middle connecting ring 8 and the mounting head 1 tightly, and fastening the second baffle 507 and the connecting column 505;

3. the second vent valve 502 is fitted into the front retainer ring 2, and the front retainer ring 2 is screwed to the mounting head 1.

Through setting up middle go-between 8, make the installation process operation of sealing joint simpler and convenient, it is more directly perceived than the installation of embodiment one, maneuverability is strong.

The axial sealing structure of the joint protected by the utility model has a double-layer sealing structure, and adopts a structure of utilizing two valve cores to carry out double sealing in the space of an inner cavity of a valve body:

the double-valve-core sealing structure can fundamentally avoid leakage, double-layer sealing is completed in one space, the valve body is smaller, energy loss is reduced, and the double-valve-core sealing structure is more convenient to use.

And secondly, the sealing structure is used for sealing the front valve core and the rear valve core, the sealing mode is homodromous and asynchronous, when the connection is disconnected, the rear valve core is firstly sealed, and then the front valve core is sealed.

And the two valve cores are sealed in a space by the acting force of a spring, and respectively play a role in pushing and pulling, so that the two valve cores are independent and are mixed into a whole.

And fourthly, because of double-layer sealing, leakage, including fine micro-leakage, can be fundamentally avoided, potential safety hazards are effectively reduced, and energy conservation and consumption reduction are realized for enterprises.

And fifthly, the double-valve-core sealing structure is used for sealing the two valve cores and has asynchronous difference, in a pipeline with more impurities, when the rear valve core is sealed, impurity dirt in the pipeline can form a static state along with the closing of the rear valve core, and impurities flowing along with gas also fall below the pipeline and the joint, so that a clean sealing end face is kept in the two valve cores, and no leakage is ensured.

To sum up, the embodiment of the present invention provides an axial sealing structure of a joint, including a tubular mounting head 1, a tubular front baffle ring 2, a guide post 3 and a bidirectional sealing device 5, where the front baffle ring 2 includes a connection section and a guide section, the inner diameter of the guide section is smaller than the inner diameter of the connection section, the connection section of the front baffle ring 2 is axially and sealingly connected with the mounting head 1, the guide post 3 is disposed in the guide section of the front baffle ring 2, the sealing device 5 is disposed inside a pipe body connecting the mounting head 1 and the front baffle ring 2, and the sealing device 5, a protruding structure disposed on the inner surface of the mounting head 1, and the left end face of the guide section of the front baffle ring 2 jointly form a sealing cavity 4. The double-valve-core sealing structure is adopted, leakage is fundamentally avoided, double-layer sealing is completed in one space, the valve body is smaller, energy loss is reduced, and the use is more convenient; meanwhile, the two valve cores are sealed and have asynchronous difference, and impurity dirt in the pipeline can form a static state along with the closing of the rear valve core, so that the cleanness of the sealing end face is kept.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims (10)

1. An axial seal structure of joint which characterized in that: keep off ring (2), guide post (3) and two-way sealing device (5) before tubular installation head (1), tubulose, keep off ring (2) including linkage segment and direction section before, the direction section internal diameter is less than the linkage segment internal diameter, the linkage segment that keeps off ring (2) before with installation head (1) axial sealing connects, guide post (3) set up in keep off in the direction section of ring (2) before, sealing device (5) set up at installation head (1) with keep off the body inside that ring (2) are connected before, sealing device (5) install the protruding structure that the internal surface set up of head (1) with keep off ring (2) direction section terminal surface before and constitute a sealed chamber (4) jointly.

2. An axial seal structure of a joint according to claim 1, wherein: the sealing device (5) comprises a first vent valve (501), a second vent valve (502), a first spring (503), a second spring (504), a connecting column (505), a first baffle (506) and a second baffle (507);

the mounting head (1) is located on one side of the front retaining ring (2), a protruding structure arranged on the inner surface of the mounting head (1) is a first protruding ring (6), the first vent valve (501) abuts against the first protruding ring (6) from the outside of one side of the sealing cavity (4), the first vent valve (501) is connected with the connecting column (505) along the direction in the sealing cavity (4), a first retaining sheet (506) which can axially move along the connecting column (505) and is limited in the sealing cavity (4) is sleeved on one side, close to the first vent valve (501), of the connecting column (505), and a second retaining sheet (507) is fixedly arranged on the right side of the connecting column (505); the second vent valve (502) is located between the connecting column (505) and the guide section of the front baffle ring (2) and is abutted against the end face of the guide section of the front baffle ring (2), two ends of the first spring (503) are respectively abutted against the first baffle sheet (506) and the second vent valve (502), the second spring (504) is located inside the first spring (503), and two ends of the second spring (504) are respectively abutted against the first baffle sheet (506) and the second baffle sheet (507).

3. An axial seal structure of a joint according to claim 2, wherein: the mounting head (1) is internally provided with a middle connecting ring (8), the outer wall of the middle connecting ring (8) is hermetically connected with the inner wall of the mounting head (1), and the first convex ring (6) is arranged on the inner wall of the middle connecting ring (8).

4. An axial seal structure of a joint according to claim 2 or 3, wherein: a first limiting boss (9) is arranged between the first convex ring (6) and the first blocking piece (506), and the first blocking piece (506) abuts against the end face of the first limiting boss (9).

5. An axial seal structure of a joint according to claim 2, wherein: first breather valve (501) is a centrosymmetric rotator, first breather valve (501) includes first valve body back end (5011), first valve body interlude and first valve body anterior segment (5012), and first valve body back end (5011) diameter is greater than the internal diameter of first bulge loop (6), first valve body anterior segment (5012) diameter is less than the internal diameter of first bulge loop (6), first valve body interlude are equipped with first recess, set up first sealing washer (7) in the first recess, the external diameter of first sealing washer (7) is greater than the internal diameter of first bulge loop (6).

6. An axial seal structure of a joint according to claim 2, wherein: the second breather valve (502) is a centrosymmetric rotating body and comprises a spring fixing platform (5021), a second valve body rear section (5022), a second valve body middle section (5023) and a second valve body front section (5024), one end of the first spring (503) is sleeved on the spring fixing table (5021) so as to limit the radial movement of the first spring (503), the diameter of the rear section (5022) of the second valve body is larger than the inner diameter of the guide section of the front baffle ring (2), the diameter of the front section (5024) of the second valve body is the same as that of the guide column (3), the front section (5024) of the second valve body is connected with the guide column (3), the middle section (5023) of the second valve body is provided with a second groove (5023a), a second sealing ring (11) is arranged in the second groove (5023a), and the outer diameter of the second sealing ring (11) is larger than the inner diameter of the guide section of the front retaining ring (2).

7. An axial seal structure of a joint according to claim 2, wherein: the second blocking piece (507) is a locknut in threaded connection with the connecting column (505), and the connecting column (505) is provided with an external thread in matched connection with the locknut.

8. An axial seal structure of a joint according to claim 2 or 3, wherein: the first convex ring (6) is provided with a bevel end (601) and a plane end (602), the plane end (602) forms a cylindrical space for accommodating the first valve body front section (5012), and the bevel end (601) forms a cone frustum-shaped space for accommodating the first sealing ring (7).

9. An axial seal structure of a joint according to claim 3, wherein: the middle connecting ring (8) comprises an external thread connecting section (801) and a limiting convex ring (802), and the inner surface of the mounting head (1) is provided with an internal thread matched with the external thread connecting section (801) and a second limiting boss (12) abutted to the limiting convex ring (802).

10. An axial seal structure of a joint according to claim 1, wherein: the mounting head (1) is in threaded connection with the front baffle ring (2), and a third sealing ring (10) is arranged on a contact surface at the tail end of the threaded connection.

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