High-sealing stop valve casting for natural gas transportation

Abstract

A connector of a valve body of the high-sealing stop valve casting comprises a main body communicated with the interior of the valve body, a convex ring arranged on the periphery of the main body and a first connecting seat arranged at the end of the valve body, the outer end of the main body is exposed out of the outer end of the convex ring, and a first sealing ring is arranged on the main body in a sleeved mode. A second sealing ring is arranged between the main body and the convex ring, a second connecting seat corresponding to the first connecting seat is arranged on the connecting pipe, the end of the connecting pipe is inserted between the main body and the convex ring, the first sealing ring seals the joint of the connecting pipe and the main body, and the second sealing ring seals the joint of the end of the connecting pipe and the valve body. The first connecting seat abuts against the outer end of the convex ring and is connected with the second connecting seat through a fixing bolt and a nut. The connecting pipe and the valve are connected more reliably, and leakage is not prone to occurring.

Description

Technical Field

[0001] The utility model relates to a high-sealing globe valve casting for natural gas transportation. Background Art

[0002] Due to its reliable sealing performance, globe valves are commonly used for natural gas transportation. However, in the prior art, the connection between the globe valve and the connecting pipe is generally only carried out by two connecting seats, and a sealing ring is arranged between the two connecting seats. The sealing of this connection structure is not reliable enough, and the internal natural gas is prone to leakage. Moreover, the stability of this connection mechanism also has certain deficiencies and is prone to dislocation and deformation under external forces, resulting in leakage. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the above deficiencies of the prior art and provide a high-sealing globe valve casting for natural gas transportation with a more reliable connection between the connecting pipe and the valve.

[0004] The technical solution of the utility model is: a high-sealing globe valve casting for natural gas transportation, including a valve body and a connecting pipe. Joints are respectively arranged at both ends of the valve body. The joint includes a main body communicating with the inside of the valve body, a convex ring arranged on the outer periphery of the main body, and a first connecting seat arranged at the end of the valve body. A distance is maintained between the inner circumference of the convex ring and the outer circumference of the main body, and the outer end of the main body extends out of the outer end of the convex ring;

[0005] A first sealing ring is sleeved on the main body, and a second sealing ring is arranged between the main body and the convex ring;

[0006] A second connecting seat corresponding to the first connecting seat is arranged on the connecting pipe. The end of the connecting pipe is inserted between the main body and the convex ring. The first sealing ring seals the connection between the connecting pipe and the main body, and the second sealing ring seals the connection between the end of the connecting pipe and the valve body;

[0007] The first connecting seat abuts against the outer end of the convex ring and is connected to the second connecting seat through fixing bolts and nuts.

[0008] Specifically, the outer diameter of the main body corresponds to the inner diameter of the connecting pipe.

[0009] Preferably, there are two first sealing rings.

[0010] Furthermore, a thickening ring is also provided at the outer end of the convex ring.

[0011] Furthermore, the end of the connecting pipe has inner and outer double chamfers.

[0012] Furthermore, the inner circumference of the end of the convex ring also has a chamfer.

[0013] Furthermore, six connecting holes are respectively provided on the first connecting seat and the second connecting seat.

[0014] Specifically, the main body, the convex ring, and the first connecting seat are integrally formed structures.

[0015] Specifically, the second connecting seat is welded to the connecting pipe.

[0016] The beneficial effects of the present utility model are as follows: In the present utility model, the connection between the joint and the connecting pipe adopts double seals, which can ensure the reliability of the seal at the connection between the two, and avoid the leakage of natural gas; the main body of the joint is inserted into the connecting pipe, the end of the connecting pipe is located between the main body and the convex ring, and the two connecting seats are connected by multiple fixing bolts, forming a double protection at the connection between the connecting pipe and the main body, which can effectively prevent the connection between the connecting pipe and the joint from being bent under external force and causing leakage; the convex ring also plays a role in limiting the end of the connecting pipe, preventing the two connecting seats from being fastened too tightly, resulting in excessive extrusion of the second sealing ring by the connecting pipe and causing the second sealing ring to rupture. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural view of the present utility model;

[0018] Figure 2 is a schematic structural view of the joint in the present utility model;

[0019] Figure 3 is a schematic structural view of the connecting pipe in the present utility model.

[0020] In the figure: valve body 1, connecting pipe 2, joint 3, main body 4, convex ring 5, first connecting seat 6, first sealing ring 7, second sealing ring 8, second connecting seat 9, fixing bolt 10, nut 11, thickening ring 12, connecting hole 13. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions of the present utility model will be further specifically described below through embodiments in conjunction with the drawings.

[0022] Combined with Figures 1-3 As shown, a high-sealing stop valve casting for natural gas transportation includes a valve body 1 and a connecting pipe 2. Joints 3 are respectively provided at both ends of the valve body 1. The joint 3 includes a main body 4 communicating with the inside of the valve body 1, a convex ring 5 provided on the outer periphery of the main body 4, and a first connecting seat 6 provided at the end of the valve body 1. A spacing is maintained between the inner periphery of the convex ring 5 and the outer periphery of the main body 4, and this spacing corresponds to the wall thickness of the end of the connecting pipe 2. The outer end of the main body 4 protrudes from the outer end of the convex ring 5;

[0023] A first sealing ring 7 is sleeved on the main body 4, and a second sealing ring 8 is provided between the main body 4 and the convex ring 5;

[0024] A second connector 9 corresponding to the first connector 6 is provided on the connecting pipe 2. The end of the connecting pipe 2 is inserted between the main body 4 and the convex ring 5. The first sealing ring 7 seals the connection between the connecting pipe 2 and the main body 4, and the second sealing ring 8 seals the connection between the end of the connecting pipe 2 and the valve body 1, thereby forming a double seal.

[0025] The first connector 6 abuts against the outer end of the convex ring 5 and is connected to the second connector 9 by fixing bolts 10 and nuts 11.

[0026] The beneficial effects of the above structure are as follows: A double seal is adopted at the connection between the joint 3 of the valve body 1 and the connecting pipe 2, which can ensure the reliability of the seal at the connection between the two and avoid the leakage of natural gas. The main body 4 of the joint 3 is inserted into the connecting pipe 2, and the end of the connecting pipe 2 is located between the main body 4 and the convex ring 5. The two connectors are connected by multiple fixing bolts 10, forming a two-fold protection at the connection between the connecting pipe 2 and the main body 4, which can effectively prevent the connection between the connecting pipe 2 and the joint 3 from being bent under external force and causing leakage. The convex ring 5 also plays a role in limiting the end of the connecting pipe 2, preventing the two connectors from being fastened too tightly, resulting in the connecting pipe 2 excessively squeezing the second sealing ring 8 and causing the second sealing ring 8 to rupture.

[0027] In another embodiment, as Figure 1 shown, the outer diameter of the main body 4 corresponds to the inner diameter of the connecting pipe 2.

[0028] In another embodiment, as Figure 1 shown, there are two first sealing rings 7.

[0029] In another embodiment, in combination with Figure 1 and Figure 2 shown, the outer end of the convex ring 5 also has a thickened ring 12 to prevent the end of the convex ring 5 from being deformed when the first connector 6 and the second connector 9 are fastened.

[0030] In another embodiment, in combination with Figure 1 and Figure 3 shown, the end of the connecting pipe 2 has inner and outer double chamfers to facilitate insertion between the main body 4 and the convex ring 5.

[0031] In another embodiment, in combination with Figure 1 and Figure 2 shown, the inner circumference of the end of the convex ring 5 also has a chamfer to facilitate the insertion of the connecting pipe 2.

[0032] In another embodiment, the first connector 6 and the second connector 9 also respectively have six connection holes 13, and each connection hole 13 is used for passing through the fixing bolt 10.

[0033] In another embodiment, the main body 4, the convex ring 5, and the first connector 6 are of an integrally formed structure.

[0034] In another embodiment, the second connecting seat 9 is welded to the connecting pipe 2.

Claims

1. A high-sealing globe valve casting for natural gas transmission, comprising a valve body (1) and a connecting pipe (2), with joints (3) respectively provided at both ends of the valve body (1), characterized in that, The joint (3) includes a main body (4) communicating with the interior of the valve body (1), a convex ring (5) arranged on the outer periphery of the main body (4), and a first connection seat (6) arranged at the end of the valve body (1). A gap is maintained between the inner periphery of the convex ring (5) and the outer periphery of the main body (4), and the outer end of the main body (4) projects out of the outer end of the convex ring (5). A first sealing ring (7) is sleeved on the main body (4), and a second sealing ring (8) is arranged between the main body (4) and the convex ring (5). A second connection seat (9) corresponding to the first connection seat (6) is arranged on the connecting pipe (2). The end of the connecting pipe (2) is inserted between the main body (4) and the convex ring (5). The first sealing ring (7) seals the connection between the connecting pipe (2) and the main body (4), and the second sealing ring (8) seals the connection between the end of the connecting pipe (2) and the valve body (1). The first connection seat (6) abuts against the outer end of the convex ring (5) and is connected to the second connection seat (9) by fixing bolts (10) and nuts (11).

2. The high-sealing globe valve casting for natural gas transportation according to claim 1, characterized in that, The outer diameter of the main body (4) corresponds to the inner diameter of the connecting pipe (2).

3. The high-sealing globe valve casting for natural gas transportation according to claim 2, characterized in that, There are two first sealing rings (7).

4. The high-sealing globe valve casting for natural gas transportation according to claim 3, characterized in that, The outer end of the convex ring (5) also has a thickened ring (12).

5. The high-sealing globe valve casting for natural gas transportation according to claim 4, characterized in that, The end of the connecting pipe (2) has inner and outer double chamfers.

6. The high-sealing globe valve casting for natural gas transportation according to claim 5, characterized in that, The inner periphery of the end of the convex ring (5) also has a chamfer.

7. A high-sealing globe valve casting for natural gas transportation according to claim 6, characterized in that, Six connection holes (13) are respectively arranged on the first connection seat (6) and the second connection seat (9).

8. A high-sealing globe valve casting for natural gas transportation as claimed in claim 7, characterized in that, The main body (4), the convex ring (5), and the first connection seat (6) are of an integrally formed structure.

9. The high-sealing globe valve casting for natural gas transportation according to claim 8, characterized in that, The second connection seat (9) is welded to the connecting pipe (2).

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