CN204153351U - A kind of SEALING FITTING - Google Patents

Abstract

The utility model relates to a sealing joint, which comprises a first joint and a second joint, an annular flange is arranged on the first joint, a socket part is arranged on the second joint, and the inner wall of the socket part is arranged For the slope matched with the annular flange, the annular flange is in contact with the slope to form a hard seal, and one or more soft seals are arranged on the annular flange and/or the socket. The utility model adopts a soft and hard multi-stage combined sealing structure, which greatly improves the sealing reliability of the joint. When all the sealing structures are damaged, there is no need to cut off the two joints, just replace the soft seal to complete the repair, which saves maintenance time, avoids the pollution of the unit system due to long-term maintenance, and realizes the safe operation of the unit.

Description

a sealed joint

technical field

The utility model relates to a joint, in particular to a sealing joint.

Background technique

Most of the speed control systems of modern thermal power generation enterprises use joints with a first-level sealing structure, and the joints are welded to the equipment or pipelines. Such joints have the following disadvantages: When the unit is running normally, if there is vibration, the sealing surface of the joints will be damaged. , so that the joint leaks oil, resulting in non-stop accidents of the unit; when the joint seal is damaged, the original joint needs to be cut off, and a new joint is used to re-weld with the equipment or pipeline, which makes the replacement time longer, and in the long-term replacement process, It is easy to cause pollution to the unit system and jam system equipment components.

Utility model content

The main purpose of the utility model is to solve the above problems and deficiencies, and provide a sealing joint with reliable sealing performance and strong adaptability to vibration.

In order to achieve the above object, the technical solution of the utility model is:

A sealing joint, comprising a first joint and a second joint, an annular flange is provided on the first joint, a socket is provided on the second joint, and the inner wall of the socket is set to be in line with the The slope surface matched with the annular flange, the annular flange is in contact with the slope surface to form a hard seal, and one or more soft seals are arranged on the annular flange and/or the socket part.

Further, it includes two first joints and one second joint, sockets are respectively provided at both ends of the second joints, ring flanges are provided on the two first joints, and the sockets The inner wall is set as a slope matching the annular flange, and the annular flange is in contact with the slope to form a hard seal, and each of the annular flanges and/or each of the sockets is provided with a or multiple soft seals.

Further, the annular flange is provided on the outer side of the pipe wall of the first joint, the outer surface of the annular flange is composed of an arc surface, a side annular surface, and a bottom plane in turn, and the arc surface and the socket part The slopes meet to form a hard seal.

Further, the inner wall of the socket part is set as a two-stage stepped structure for fixing the pipe wall and the annular flange of the first joint, and the end of the pipe wall of the first joint is fixed on the first step, so The annular flange of the first joint is fixed on the second step, and the connection surface between the first step and the second step is set as the slope.

Further, one or more sealing grooves are arranged on the surface of the annular flange, and a sealing ring is arranged in each sealing groove, and the sealing ring forms a soft seal with the inner wall of the socket part.

Further, one or more sealing grooves are arranged on the inner wall of the socket part, and a sealing ring is arranged in each of the sealing grooves, and the sealing ring forms a soft seal with the pipe wall of the first joint.

Further, the sealing ring is an "O" sealing ring or a "Y" sealing ring.

Further, the first joint and the second joint are tightly connected by a screw sleeve.

In summary, the sealing joint described in the utility model has the following advantages:

1. The multi-stage combined sealing structure of soft and hard is adopted, which greatly improves the sealing reliability of the joint.

2. When the screw sleeve is loosened due to vibration, the first joint and the second joint are allowed to slide axially within the effective range of the soft seal, and after the hard seal is damaged, the soft seal can still seal effectively, so that the joint is resistant to vibration Adaptable.

3. When all the sealing structures are damaged, there is no need to cut off the two joints, just replace the soft seal to complete the repair, which saves maintenance time, avoids the pollution of the unit system due to long-term maintenance, and realizes the safe operation of the unit.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment one;

Fig. 2 is the structural representation of the second embodiment of the utility model;

Fig. 3 is a schematic structural view of a fourth embodiment of the utility model;

Fig. 4 is a schematic structural view of Embodiment 4 of the present utility model.

As shown in Figures 1 to 4, the first joint 100, the second joint 200, the screw sleeve 300, the sealing groove 400, the sealing ring 500, the annular flange 101, the arc surface 1011, the bottom plane 1013, the side ring surface 1012, the socket Part 201, slope 202, ring stopper 301.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

Embodiment one:

As shown in Figure 1, a sealed joint includes two joints that need to be sealed, namely the first joint 100 and the second joint 200, and the first joint 100 and the second joint 200 are respectively fixed to the pipeline or equipment of the unit connect.

An annular flange 101 is provided on the first joint 100. The annular flange 101 is a protruding structure arranged outside the pipe wall of the first joint 100. The outer surface of the annular flange 101 is composed of three surfaces, which are respectively the arc of the top. surface 1011 , a bottom plane 1013 at the bottom, and a side annulus 1012 at a side, wherein the bottom plane 1013 is perpendicular to the side annulus 1012 .

A socket portion 201 is provided on the second joint 200, and the inner wall of the socket portion 201 is arranged as a two-level stepped structure, the first-level stepped structure is used to fix the pipe wall of the first joint 100, and the second-level stepped structure is used to fix the first For the annular flange 101 of the joint 100, after the first joint 100 is inserted into the second joint 200, the pipe wall end is fixed on the first step, and the annular flange 101 is fixed on the second step. The connecting surface between the first step and the second step is set as a slope 202, and the slope 202 is a plane. After the first joint 100 is inserted into the second joint 200, the arc surface 1011 of the annular flange 101 and the slope 202 The contact forms a hard seal, which is a line seal due to the contact between the curved and flat surfaces.

With the structure of wire seal, the processing accuracy can be reduced during processing. When an error occurs, the adjustment can be realized through the fastening force when the first joint 100 and the second joint 200 are fixed, so as to ensure the sealing reliability of the hard seal.

In this embodiment, a soft seal is provided on both sides of the hard seal, and a seal groove 400 is provided on the inner wall of the socket part 201, specifically on the plane of the first step of the socket part 201, in the seal groove 400 Set a sealing ring 500, the sealing ring 500 adopts an "O" type sealing ring, the depth of the sealing groove 400 can ensure that the inner diameter of the sealing ring 500 after the sealing ring 500 is set in the sealing groove 400 is smaller than the diameter of the inner wall of the socket part 201, the sealing ring 500 A soft seal is formed with the pipe wall of the first joint 100 .

A sealing groove 400 is also provided on the surface of the annular flange 101, specifically on the side annular surface 1012, and a sealing ring 500 is arranged in the sealing groove 400. The sealing ring 500 adopts an "O" type sealing ring, and the sealing groove 400 The depth can ensure that the outer diameter of the sealing ring 500 after the sealing ring 500 is set in the sealing groove 400 is larger than the outer diameter of the annular flange 101, and the sealing ring 500 forms a soft seal with the inner wall of the socket part 201 of the second joint 200.

After the first joint 100 and the second joint 200 are fixedly connected, a soft-hard-soft combined three-stage combined sealing structure is formed.

The first joint 100 and the second joint 200 are tightly connected by a screw sleeve 300, the outer wall of the socket part 201 is provided with external threads, one end of the screw sleeve 300 is threadedly connected with the socket part 201 of the second joint 200, and the screw sleeve 300 The other end face is provided with an inwardly extending annular stopper 301. After the screw sleeve 300 is tightened, the socket part 201 and the annular flange 101 are respectively against the annular stopper 301, so that the annular flange 101 of the first joint 100 is in contact with the second The socket portion 201 of the joint 200 is fixed. The fixing method of the first joint 100 and the second joint 200 may also be other structural forms such as welding, thread, and clamp.

The installation process of the sealing joint is as follows: put the sealing ring 500 in the sealing groove 400 of the first joint 100, put the sealing ring 500 in the sealing groove 400 of the second joint 200, and pass the first joint 100 through the screw sleeve 300 The central hole is opened, and then the screw sleeve 300 is tightened to complete the sealing and fixing of the first joint 100 and the second joint 200 .

The combination of soft and hard seals is adopted. After the hard seal is damaged, the soft seal can still seal effectively. The joint has strong adaptability to vibration, which greatly improves the reliability of joint sealing. When all the sealing structures are damaged, there is no need to cut off the two joints, just replace the soft seal to complete the repair, which saves maintenance time and avoids long-term maintenance. The pipeline is exposed to the air to pollute the unit system and realizes safe operation. When the screw sleeve 300 is loosened due to vibration, the first joint 100 and the second joint 200 will slide axially. Due to the existence of the soft seal, the two joints can slide axially without falling out of the effective range of the soft seal.

Embodiment two:

As shown in Figure 2, an annular flange 101 is provided on the first joint 100, and the annular flange 101 is a raised structure arranged on the outside of the pipe wall of the first joint 100, and the outer surface of the annular flange 101 is composed of three surfaces , are respectively the arc surface 1011 of the top, the bottom plane 1013 of the bottom and the side ring surface 1012 of the side, wherein the bottom plane 1013 is perpendicular to the side ring surface 1012.

A socket portion 201 is provided on the second joint 200, and the inner wall of the socket portion 201 is arranged as a two-level stepped structure, the first-level stepped structure is used to fix the pipe wall of the first joint 100, and the second-level stepped structure is used to fix the first For the annular flange 101 of the joint 100, after the first joint 100 is inserted into the second joint 200, the pipe wall end is fixed on the first step, and the annular flange 101 is fixed on the second step. The connecting surface between the first step and the second step is set as a slope 202, and the slope 202 is a plane. After the first joint 100 is inserted into the second joint 200, the arc surface 1011 of the annular flange 101 and the slope 202 The contact forms a hard seal, which is a line seal due to the contact between the curved and flat surfaces.

In this embodiment, one side of the hard seal is provided with a soft seal, and a seal groove 400 is provided on the surface of the annular flange 101, specifically on the side ring surface 1012, and a seal groove 400 is provided in the seal groove 400. The ring 500 and the seal ring 500 adopt a "Y" seal ring. After the "Y" seal ring is set in the seal groove 400, its inner and outer rings are in contact with the surface of the annular flange 101 and the inner wall of the socket part 201 to form a soft seal. After the first joint 100 and the second joint 200 are fixed, a soft-hard combined secondary sealing structure is formed.

Embodiment three:

In this embodiment, a plurality of sealing grooves 400 are provided on the annular flange 101 of the first joint 100 and/or the socket portion 201 of the second joint 200, and a sealing ring 500 is provided in each sealing groove 400, forming a Multi-stage flexible and rigid sealing structure.

Embodiment four:

As shown in Fig. 3 and Fig. 4, in this embodiment, a kind of sealing joint comprises two first joints 100 and a second joint 200, and two first joints 100 are all provided with annular flange 101, and the second joint Sockets 201 are provided at both ends of the 200, and the two ends of the second joint 200 are respectively connected to a first joint 100, and its hard sealing structure is the same as that of the first embodiment.

A soft seal is also provided between the first joint 100 and the second joint 200 . As shown in Figure 3, the structure of the soft seal can be the same as that of Embodiment 1; as shown in Figure 4, the structure of the soft seal can be the same as that of Embodiment 2; the structure of the soft seal can also be the same as that of Embodiment 3.

As mentioned above, a similar technical solution can be derived in combination with the content of the solution given in the accompanying drawings. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model without departing from the content of the technical solution of the utility model still belong to the scope of the technical solution of the utility model.

Claims (8)

1. a SEALING FITTING, comprise the first joint and the second joint, it is characterized in that: on described first joint, be provided with annular flange flange, described second joint is provided with socket, it is domatic that the inwall of described socket is set to match with described annular flange flange, described annular flange flange with domatic contact to be formed firmly seal, described annular flange flange and/or socket are provided with one or more soft seal.

2. a kind of SEALING FITTING according to claim 1, it is characterized in that: comprise two the first joints and second joint, socket is respectively arranged with at the two ends of described second joint, two described first joints are provided with annular flange flange, it is domatic that the inwall of described socket is set to match with described annular flange flange, described annular flange flange with domatic contact to be formed firmly seal, each described annular flange flange and/or each described socket are provided with one or more soft seal.

3. a kind of SEALING FITTING according to claim 1 and 2, it is characterized in that: annular flange flange described in the tube wall arranged outside of described first joint, the outer surface of described annular flange flange is made up of cambered surface, side ring surface, bottom plane successively, and described cambered surface and described socket domatic contacts to be formed and firmly seal.

4. a kind of SEALING FITTING according to claim 1 and 2, it is characterized in that: the inwall of described socket is set to for the fixing tube wall of described first joint and the secondary hierarchic structure of annular flange flange, the tube wall end winding support of described first joint is on first order ladder, the annular flange flange of described first joint is fixed on the ladder of the second level, and the junction surface between described first order ladder and second level ladder is set to described domatic.

5. a kind of SEALING FITTING according to claim 1 and 2, it is characterized in that: on the surface of described annular flange flange, be provided with one or more seal groove, in each described seal groove, arrange a seal ring, the inwall of described seal ring and described socket forms soft seal.

6. a kind of SEALING FITTING according to claim 5, it is characterized in that: on the inwall of described socket, be provided with one or more seal groove, in each described seal groove, arrange a seal ring, the tube wall of described seal ring and described first joint forms soft seal.

7. a kind of SEALING FITTING according to claim 6, is characterized in that: described seal ring is " O " RunddichtringO or " Y " RunddichtringO.

8. a kind of SEALING FITTING according to claim 1 and 2, is characterized in that: described first joint and the second joint are fastenedly connected by a swivel nut.