Ball valve flange sealing structure

Abstract

The utility model relates to the technical field of ball valves, and discloses a ball valve flange sealing structure, which is characterized in that a connecting pipe seat is mounted on the side of a flange connecting seat through a sealing gasket seat matched with a fastening bolt, and the sealing gasket seat is respectively connected with the connecting pipe seat and the flange connecting seat in an embedded manner through sealing convex rings on the two sides of the sealing gasket seat; the sealing gasket seat is inserted and installed in the connecting pipe seat and the flange connecting seat in a stretching and embedded mode through the necking sleeve on the two sides, the sealing gasket seat serves as a sealing structure of the connecting position of the flange connecting seat, and the sealing protruding ring on the side of the sealing gasket seat is embedded and sealed with the sealing embedding groove in the connecting side of the flange connecting seat. The installation stability and the sealing effect of the sealing gasket seat can be effectively improved, the necking cylinder sleeves are arranged on the two sides of the sealing gasket seat, the necking cylinder sleeves are connected with the ring caulking grooves in the flange connecting seat in an inserted and embedded mode, the necking cylinder sleeves can stretch into and be sealed in the flange connecting seat, and therefore the sealing gasket seat is not prone to falling off. The water hydraulic pressure in the flange connecting seat can be used for pushing and sealing the connecting side of the necking sleeve, and the sealing effect of the valve body can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a ball valve flange sealing structure. Background Art

[0002] A ball valve is a pipeline device used to regulate the flow rate of a fluid. It mainly adjusts the angle of the ball through the valve stem, thereby adjusting the cross-sectional area of ​​the fluid passing through the ball to achieve the purpose of regulating the flow rate of the fluid. Among them, flanged ball valves are a common type of ball valve. Flange-type ball valves use a flange interface structure to connect to the pipeline.

[0003] In the prior art, when a flange-type ball valve is installed and connected to a pipeline, it is often only installed and sealed between two flanges, and the connecting sides of the flanges on both sides are only sealed by a disc-shaped sealing gasket. The circular sealing gasket can only seal the joints between the flanges, and the structural sealing is poor. It is easy to leak in a high-pressure working environment, which is very inconvenient to use. Utility Model Content

[0004] The purpose of the utility model is to provide a ball valve flange sealing structure to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a ball valve flange sealing structure, comprising a sealing mechanism for connecting and closing a ball valve body, the sealing mechanism comprising a connecting pipe seat, a sealing pad seat and a fastening bolt, a control valve stem is arranged on the upper part of the ball valve body, flange seats are arranged on both sides of the ball valve body, and the connecting pipe seat is installed on the side of the flange seat through the sealing pad seat and the fastening bolts;

[0006] Sealing convex rings are provided on both sides of the sealing gasket seat, and the sealing gasket seat is respectively engaged and connected with the connecting pipe seat and the flange seat through the sealing convex rings on both sides. Shrinking sleeves are provided on both sides of the sealing gasket seat, and the sealing gasket seat is respectively extended into the interior of the connecting pipe seat and the flange seat through the shrinking sleeves on both sides for engagement and insertion.

[0007] Preferably, the flange seats are respectively fixed to the left and right sides of the ball valve body, and the control valve stem is rotatably mounted on the middle part of the top side of the ball valve body.

[0008] Preferably, the connection sides of the flange connector and the connecting pipe seat are both provided with sealing grooves, and the two sealing convex rings are symmetrically fixed on both sides of the sealing pad seat.

[0009] Preferably, the sealing groove is matched with a sealing convex ring, and the sealing convex ring is tightly embedded in the inner side of the sealing groove.

[0010] Preferably, the flange connector and the pipe opening of the connecting pipe seat are both provided with an annular groove, and the two shrink sleeves are symmetrically fixed on the left and right sides of the sealing pad seat.

[0011] Preferably, the ring embedding groove is matched with the end of the shrinking sleeve, the end of the shrinking sleeve is embedded and inserted into the inner side of the ring embedding groove, and the edge side of the ring embedding groove is provided with a chamfer.

[0012] Preferably, the connection sides of the flange connector and the connecting pipe seat are both provided with bolt connection holes, the fastening bolts are inserted through the inner sides of the bolt connection holes, the connecting pipe seat is fixedly installed on the sides of the flange connector by the fastening bolts, and the sides of the bolt connection holes are provided with nut grooves.

[0013] Compared with the prior art, the utility model adopts the above technical solution and has the following technical effects:

[0014] The sealing structure adopts an embedded closing structure for the flange joint, and uses the sealing gasket seat as the sealing structure of the flange joint connection. The sealing convex ring on the side of the sealing gasket seat is embedded and closed with the sealing embedding groove on the connecting side of the flange joint, which can effectively improve the installation stability and sealing effect of the sealing gasket seat, and a shrinking sleeve is arranged on both sides of the sealing gasket seat, and the shrinking sleeve is inserted and embedded in the ring groove in the flange joint so that the shrinking sleeve can be extended into the interior of the flange joint, and the water pressure in the flange joint can be used to achieve a push-closed sealing on the connecting side of the shrinking sleeve. After installation, the connection of the flange joint can be ensured to maintain a stable closed state, which can effectively improve the sealing effect of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the overall installation front structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the overall installation rear structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the overall split structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the sealing pad seat structure of the utility model;

[0020] Figure 5It is a schematic diagram of the cross-sectional structure of the connection between the connecting pipe seat and the flange seat of the utility model.

[0021] Explanation of the reference numerals: 1. Ball valve body; 2. Flange seat; 3. Control valve stem; 4. Connecting pipe seat; 5. Sealing pad seat; 6. Fastening bolt; 7. Shrink sleeve; 8. Ring groove; 9. Sealing convex ring; 10. Sealing groove; 11. Bolt connection hole; 12. Nut groove; 13. Chamfer. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0024] Example

[0025] See also Figure 1-5 The utility model provides a technical solution: a ball valve flange sealing structure, including a sealing mechanism for connecting and closing a ball valve body 1. In order to control the switch of the ball valve body 1, a control valve stem 3 is arranged on the upper part of the ball valve body 1. The control valve stem 3 is rotatably installed in the middle of the top side of the ball valve body 1. In order to connect and install with a connecting pipe seat 4, as shown in the attached Figure 1 As shown, flange sockets 2 are provided on both sides of the ball valve body 1 , and the flange sockets 2 are respectively fixed on the left and right sides of the ball valve body 1 to serve as a connecting installation structure of the ball valve body 1 .

[0026] The sealing mechanism is used for the connection and sealing of the connection side of the ball valve body 1. The sealing mechanism includes a connecting pipe seat 4, a sealing pad seat 5 and a fastening bolt 6. The sealing pad seat 5 is made of rubber. In order to improve the connection and sealing performance between the sealing pad seat 5 and the outer side of the ball valve body 1, sealing convex rings 9 are provided on both sides of the sealing pad seat 5. Figure 4As shown, the sealing convex ring 9 is in the shape of an annulus, and the two sealing convex rings 9 are symmetrically fixed on both sides of the sealing gasket seat 5. In order to be embedded and connected with the sealing gasket seat 5, sealing embedding grooves 10 are provided on the connecting sides of the flange seat 2 and the connecting pipe seat 4. The sealing embedding grooves 10 are adapted to the sealing convex ring 9, and the sealing convex ring 9 is tightly embedded in the inner side of the sealing embedding grooves 10. The sealing gasket seat 5 is respectively embedded and connected with the connecting pipe seat 4 and the flange seat 2 through the sealing convex rings 9 on both sides, which can effectively improve the installation stability and sealing effect of the sealing gasket seat 5.

[0027] In order to improve the sealing performance of the connection between the sealing seat 5 and the inner connection of the ball valve body 1, a shrink sleeve 7 is provided on both sides of the sealing seat 5. Figure 4 As shown, two shrinking sleeves 7 are symmetrically fixed on the left and right sides of the sealing gasket seat 5. In order to facilitate the installation and connection with the shrinking sleeves 7, ring grooves 8 are provided inside the pipe openings of the flange seat 2 and the connecting pipe seat 4. The ring grooves 8 are adapted to the ends of the shrinking sleeves 7. The ends of the shrinking sleeves 7 are inserted and inserted into the inner sides of the ring grooves 8. The sealing gasket seat 5 is respectively inserted and installed in the connecting pipe seat 4 and the flange seat 2 through the shrinking sleeves 7 on both sides. The water pressure in the flange seat 2 can be used to push and close the connection side of the shrinking sleeve 7. After installation, the connection of the flange seat 2 can be ensured to maintain a stable closed state. In order to reduce the resistance to the flow of water, as shown in the attached Figure 5 As shown, a chamfer 13 is provided on the edge side of the ring groove 8 .

[0028] In order to facilitate the installation and fixation of the connecting pipe seat 4, bolt connection holes 11 are provided on the connection sides of the flange seat 2 and the connecting pipe seat 4. The fastening bolts 6 are inserted into the inner sides of the bolt connection holes 11. The connecting pipe seat 4 is fixedly installed on the side of the flange seat 2 by the fastening bolts 6. In order to facilitate the engagement and limiting of the nuts at the ends of the fastening bolts 6, nut embedding grooves 12 are provided on the side of the bolt connection holes 11. During installation, the nuts at the ends of the fastening bolts 6 are embedded in the inside of the nut embedding grooves 12, which can facilitate the tightening of the fastening bolts 6.

[0029] Working principle or structural principle, during installation, first align the shrinking sleeve 7 on one side of the sealing gasket seat 5 with the ring embedding groove 8 in the flange seat 2 on the side of the ball valve body 1, and insert the shrinking sleeve 7 into the inner side of the ring embedding groove 8, adjust the position of the sealing gasket seat 5 so that the sealing gasket seat 5 is connected to the bolt connection hole 11 on the upper part of the flange seat 2, and then embed the sealing convex ring 9 into the sealing embedding groove 10 on the side of the flange seat 2 by embedding, and then align and fit the connecting pipe seat 4 on the other side of the sealing gasket seat 5, so that the shrinking sleeve 7 on the other side of the sealing gasket seat 5 is embedded and inserted into the ring embedding groove 8 in the connecting pipe seat 4, and after completion, install the fastening bolts 6 into the inner side of the bolt connection hole 11 in sequence, and then complete the installation and fixation of the connecting pipe seat 4 by tightening.

[0030] In summary, the present sealing structure adopts an embedded closing structure for the flange seat 2, and uses the sealing gasket seat 5 as the sealing structure at the connection of the flange seat 2. The sealing convex ring 9 on the side of the sealing gasket seat 5 is embedded and closed with the sealing embedding groove 10 on the connection side of the flange seat 2, which can effectively improve the installation stability and sealing effect of the sealing gasket seat 5, and a shrinking sleeve 7 is arranged on both sides of the sealing gasket seat 5, and the shrinking sleeve 7 is inserted and embedded with the ring embedding groove 8 in the flange seat 2, so that the shrinking sleeve 7 can be extended into the interior of the flange seat 2, and the water pressure in the flange seat 2 can be used to achieve a push-closed connection side of the shrinking sleeve 7. After installation, the connection of the flange seat 2 can be ensured to maintain a stable closed state, which can effectively improve the sealing effect of the valve body.

[0031] So far, the embodiments of the utility model have been described in detail in conjunction with the accompanying drawings. It should be noted that the implementation methods not shown or described in the drawings or the body of the specification are all forms known to ordinary technicians in the relevant technical field and are not described in detail. In addition, the above definitions of each component are not limited to the various specific structures, shapes or methods mentioned in the embodiments, and ordinary technicians in the field can simply change or replace them.

[0032] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A ball valve flange sealing structure, comprising a sealing mechanism for connecting and sealing a ball valve body (1), characterized in that: The sealing mechanism comprises a connecting pipe seat (4), a sealing pad seat (5) and a fastening bolt (6); a control valve stem (3) is arranged on the upper part of the ball valve body (1); flange seats (2) are arranged on both sides of the ball valve body (1); the connecting pipe seat (4) is installed on the side of the flange seat (2) through the sealing pad seat (5) and the fastening bolts; The sealing gasket seat (5) is provided with sealing convex rings (9) on both sides, and the sealing gasket seat (5) is respectively connected with the connecting pipe seat (4) and the flange seat (2) through the sealing convex rings (9) on both sides. The sealing gasket seat (5) is provided with shrinking sleeves (7) on both sides, and the sealing gasket seat (5) is respectively inserted into the interior of the connecting pipe seat (4) and the flange seat (2) through the shrinking sleeves (7) on both sides.

2. A ball valve flange sealing structure according to claim 1, characterized in that: The flange seats (2) are respectively fixed to the left and right sides of the ball valve body (1), and the control valve stem (3) is rotatably mounted on the middle part of the top side of the ball valve body (1).

3. A ball valve flange sealing structure according to claim 1, characterized in that: The connection sides of the flange connection seat (2) and the connection pipe seat (4) are both provided with sealing grooves (10), and the two sealing convex rings (9) are symmetrically fixed on the two sides of the sealing pad seat (5).

4. A ball valve flange sealing structure according to claim 3, characterized in that: The sealing groove (10) is matched with the sealing convex ring (9), and the sealing convex ring (9) is tightly embedded in the inner side of the sealing groove (10).

5. A ball valve flange sealing structure according to claim 4, characterized in that: The flange connection seat (2) and the pipe opening of the connecting pipe seat (4) are both provided with an annular groove (8), and the two shrink sleeves (7) are symmetrically fixed on the left and right sides of the sealing pad seat (5).

6. A ball valve flange sealing structure according to claim 5, characterized in that: The ring embedding groove (8) is matched with the end of the shrinking sleeve (7), the end of the shrinking sleeve (7) is embedded and inserted into the inner side of the ring embedding groove (8), and the edge side of the ring embedding groove (8) is provided with a chamfer (13).

7. A ball valve flange sealing structure according to claim 6, characterized in that: The connection sides of the flange connection seat (2) and the connection pipe seat (4) are both provided with bolt connection holes (11), the fastening bolts (6) are inserted through the inner side of the bolt connection holes (11), the connection pipe seat (4) is fixedly mounted on the side of the flange connection seat (2) by the fastening bolts (6), and the side of the bolt connection hole (11) is provided with nut embedding grooves (12).

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