Corrugated pipe stop valve

Abstract

The utility model discloses a corrugated pipe stop valve which comprises a valve body, a valve cover, a valve rod and a valve clack, the valve cover is installed on the upper portion of the valve body, the valve rod penetrates through the valve cover and extends into the valve body to be in linkage connection with the valve clack, and a valve seat is arranged in the valve body. The corrugated pipe is arranged on the periphery of the valve rod in a sleeved mode, an upper connecting flange and a lower connecting flange are arranged at the upper end and the lower end of the corrugated pipe respectively, a connecting portion is arranged on the upper connecting flange, the outer edge of the connecting portion is clamped between the valve cover and the valve body, and the connecting disc is installed on the portion, corresponding to the lower connecting flange, of the valve rod. The quick connecting piece comprises a vertical plate, a first transverse plate, a second transverse plate and a third transverse plate, a sliding groove allowing the outer edge of the lower connecting flange to be embedded therein is formed between the first transverse plate and the second transverse plate, an inserting groove allowing the third transverse plate to be inserted therein is formed in the connecting disc, and the third transverse plate is in interference fit with the inserting groove. The corrugated pipe disclosed by the utility model adopts a detachable structure, so that the earlier-stage assembly and the later-stage replacement operation are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a bellows stop valve. Background Art

[0002] The stop valve, also known as the gate valve, is a forced sealing valve and one of the most widely used valves. It is popular because the friction between the sealing surfaces during opening and closing is small, it is relatively durable, the opening height is not large, it is easy to manufacture and maintain, and it is suitable not only for medium and low pressures, but also for high pressures.

[0003] In order to prevent the medium from directly contacting the packing, the utility model patent with the publication number CN202674328U discloses a bellows stop valve, which includes a valve body, a valve disc, a valve stem, a bellows, a driving member, and a packing. The valve body is provided with an inflow channel and an outflow channel, and a valve cavity is provided between the inflow channel and the outflow channel. The valve disc and the valve stem are linked and matched, the bellows is sleeved on the valve stem, the valve stem and the driving member are linked and matched, the bellows is located between the packing and the valve disc, and also includes a connector and a bracket. The connector is located between the bracket and the valve body, the packing is located between the valve stem and the bracket, one end of the valve stem is located in the valve cavity, and the other end passes through the connector and the bracket and is connected to the driving member. The connector is welded to the bracket and the valve body. However, in this scheme, the two ends of the bellows are respectively welded to the bracket and the valve stem. When the bellows fails, it is difficult to disassemble the bellows. If the welding combination of the bracket, the valve stem and the bellows is replaced, the cost is too high. Therefore, it is necessary to improve the structure. Utility Model Content

[0004] The utility model aims to provide a bellows stop valve. The bellows of the utility model adopts a detachable structure, which is conducive to early assembly and later replacement operations.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bellows stop valve, comprising a valve body, a valve cover, a valve stem and a valve disc, the valve cover is installed on the upper part of the valve body, the valve stem penetrates the valve cover and extends into the interior of the valve body to be linked with the valve disc, and a valve seat is provided inside the valve body to abut against the valve disc to form a sealing fit when the valve is closed; it also includes a bellows, a connecting plate and a plurality of quick connectors, the bellows is sleeved on the outer periphery of the valve stem, the upper and lower ends of the bellows are respectively provided with an upper connecting flange and a lower connecting flange, the upper connecting flange is provided with a connecting portion extending toward the outer periphery, the outer edge of the connecting portion is clamped between the valve cover and the valve body, the connecting plate is installed below the lower connecting flange corresponding to the valve stem, the quick connector comprises a vertical plate and a first horizontal plate, a second horizontal plate and a third horizontal plate arranged in parallel on the vertical plate, a slide groove for the outer edge of the lower connecting flange to be embedded is formed between the first horizontal plate and the second horizontal plate, a slot for the third horizontal plate to be inserted is provided on the connecting plate, and the third horizontal plate is interference fit with the slot.

[0006] By adopting the above technical solution, the connection part of the upper connecting flange is clamped between the valve cover and the valve body to fix the upper end of the bellows, and the lower connecting flange is connected to the connecting disk set on the valve stem through multiple quick connectors. When connecting, it is only necessary to insert the third horizontal plate of the quick connector into the slot of the connecting disk, and at the same time, the lower connecting flange is inserted into the slide groove formed by the first horizontal plate and the second horizontal plate. The installation is very convenient. When separating, it is only necessary to pull out the quick connector. Therefore, the bellows of the utility model adopts a detachable structure, which is conducive to the early assembly and the later replacement operation.

[0007] The utility model is further configured that the inner circumferential surface of the lower connecting flange is provided with a sealing ring for forming a sealing fit with the outer circumferential surface of the valve stem.

[0008] By adopting the above technical solution, the sealing between the lower connecting flange and the valve stem can be ensured, and the medium can be prevented from passing through the gap between the two.

[0009] The utility model is further configured that an anti-loosening protrusion is provided in the slot, and an anti-loosening recess matched with the anti-loosening protrusion is provided on the third transverse plate.

[0010] By adopting the above technical solution, the firmness of the installation of the third cross plate can be further improved, thereby improving the reliability of the connection structure between the quick connector and the lower connecting flange and the connecting plate.

[0011] The utility model is further configured that the outer side of the vertical plate is vertically provided with reinforcing ribs.

[0012] By adopting the above technical solution, the strength of the quick connector can be improved, thereby increasing its service life.

[0013] The utility model is further configured that the inner end of the valve stem is provided with a threaded section, and the connecting plate is threadedly connected to the threaded section.

[0014] By adopting the above technical solution, the connection structure between the connecting plate and the valve stem is simple and reliable, and disassembly and assembly are very convenient. At the same time, due to the threaded cooperation between the connecting plate and the valve stem, the lower connecting flange can be driven to adjust the axial position, so that the bellows can adapt to valve stems of different lengths.

[0015] The utility model is further configured that a plurality of screw holes are arranged on the outer periphery of the connection plate, and a push rod is threadedly connected to each screw hole.

[0016] By adopting the above technical solution, the rotation of the connecting disk is achieved by acting on the push rod, which makes the operation very convenient and labor-saving.

[0017] The utility model is further configured that a locking ring is threadedly connected to the threaded section of the valve stem, and a resistance-increasing convex pattern is provided on the outer periphery of the locking ring, and the locking ring is tightly pressed against the connecting disk.

[0018] By adopting the above technical solution, the locking ring presses against the connecting disk, which can increase the friction between the connecting disk and the threaded section, thereby preventing the connecting disk from loosening.

[0019] The utility model is further configured that a thread groove is provided at the upper end of the valve disc, the thread section of the valve stem is threadedly connected to the thread groove, and the thread section on the valve disc is locked and connected to the valve disc through a transverse pin.

[0020] By adopting the above technical solution, the connection structure is simple, reliable and has good firmness.

[0021] The utility model is further configured that a mounting groove is provided in the valve body, a valve seat is locked and connected to the mounting groove by a plurality of locking screws inside the valve body, and a sealing gasket is sandwiched between the valve seat and the mounting groove.

[0022] By adopting the above technical solution, the valve seat adopts a detachable structure, which is convenient for the later replacement of the valve seat. At the same time, since the valve seat is not threaded or welded inside the valve body, it is locked in the installation groove by a locking screw, which can greatly reduce the damage inside the valve body and improve the service life of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of Example 1;

[0024] Figure 2 This is a schematic diagram of the connection structure between the bellows and the valve stem of the utility model;

[0025] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of the middle part A;

[0026] Figure 4 It is a schematic diagram of the overall structure of Example 2;

[0027] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of part B in the middle.

[0028] In the figure: 1. valve body; 2. valve cover; 3. valve stem; 4. valve disc; 5. valve seat; 6. bellows; 7. connecting plate; 8. quick connector; 9. upper connecting flange; 10. lower connecting flange; 11. vertical plate; 12. first horizontal plate; 13. second horizontal plate; 14. third horizontal plate; 15. slide groove; 16. slot; 17. sealing ring; 18. anti-loosening protrusion; 19. anti-loosening recess; 20. reinforcing rib; 21. threaded section; 22. screw hole; 23. push rod; 24. locking ring; 25. resistance-increasing convex pattern; 26. threaded groove; 27. horizontal pin; 28. mounting groove; 29. ​​locking screw; 30. sealing gasket; 31. connecting part. DETAILED DESCRIPTION

[0029] 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.

[0030] Embodiment 1: As attached Figures 1 to 3A bellows stop valve shown in the figure comprises a valve body 1, a valve cover 2, a valve stem 3 and a valve disc 4, wherein the valve cover 2 is mounted on the upper part of the valve body 1, the valve stem 3 penetrates the valve cover 2 and extends into the interior of the valve body 1 to be linked with the valve disc 4, and a valve seat 5 is provided inside the valve body 1 to form a sealing fit with the valve disc 4 when the valve is closed; the stop valve also comprises a bellows 6, a connecting plate 7 and a plurality of quick connectors 8, the bellows 6 is sleeved on the outer periphery of the valve stem 3, an upper connecting flange 9 and a lower connecting flange 10 are welded at the upper and lower ends of the bellows 6, a connecting portion 31 extending toward the outer periphery is provided on the upper connecting flange 9, the connecting portion 31 is bowl-shaped in main body, and its edge is a flat annular shape, and the outer portion of the connecting portion 31 is The edge clamp is arranged between the valve cover 2 and the valve body 1, and the connecting plate 7 is installed below the lower connecting flange 10 corresponding to the valve stem 3. The quick connector 8 includes a vertical plate 11 and a first horizontal plate 12, a second horizontal plate 13, and a third horizontal plate 14 arranged parallel to the vertical plate 11. The vertical plate 11, the first horizontal plate 12, the second horizontal plate 13, and the third horizontal plate 14 are an integrated structure. A slide groove 15 is formed between the first horizontal plate 12 and the second horizontal plate 13 for the outer edge of the lower connecting flange 10 to be embedded. A slot 16 for inserting the third horizontal plate 14 is provided on the connecting plate 7, and the third horizontal plate 14 is interference fit with the slot 16. The ends of the first horizontal plate 12, the second horizontal plate 13, and the third horizontal plate 14 all have guiding inclined surfaces. The connection part 31 of the upper connection flange 9 is clamped between the valve cover 2 and the valve body 1 to fix the upper end of the bellows 6. The lower connection flange 10 is connected to the connection plate 7 set on the valve stem 3 through multiple quick connectors 8. When connecting, it is only necessary to insert the third horizontal plate 14 of the quick connector 8 into the slot 16 of the connection plate 7, and at the same time, the lower connection flange 10 is inserted into the slide groove 15 formed by the first horizontal plate 12 and the second horizontal plate 13. The installation is very convenient. When separating, it is only necessary to pull out the quick connector 8. Therefore, the bellows 6 of the utility model adopts a detachable structure, which is conducive to the early assembly and the later replacement operation.

[0031] As attached Figure 2 As shown, the inner circumference of the lower connecting flange 10 is provided with a sealing ring 17 for forming a sealing match with the outer circumference of the valve stem 3, that is, a sealing groove is provided on the inner circumference of the lower connecting flange 10, and the sealing ring 17 is arranged in the sealing groove. This design can ensure the sealing between the lower connecting flange 10 and the valve stem 3 and prevent the medium from passing through the gap between the two.

[0032] As attached Figure 3 As shown, the slot 16 is provided with an anti-loosening protrusion 18, which is in a semi-ellipsoidal shape, and the third horizontal plate 14 is provided with an anti-loosening recess 19 that fits with the anti-loosening protrusion 18. This design can further improve the firmness of the installation of the third horizontal plate 14, thereby improving the reliability of the connection structure of the quick connector 8 to the lower connecting flange 10 and the connecting plate 7.

[0033] As attached Figure 2 As shown, the outer side of the vertical plate 11 is vertically provided with reinforcing ribs 20. This design can improve the strength of the quick connector 8, thereby improving its service life.

[0034] As attached Figure 2 As shown, the inner end of the valve stem 3 is provided with a threaded section 21, and the connecting plate 7 is threadedly connected to the threaded section 21. The connection structure between the connecting plate 7 and the valve stem 3 is simple and reliable, and it is very convenient to disassemble and assemble. At the same time, since the connecting plate 7 and the valve stem 3 are threadedly matched, the lower connecting flange 10 can be driven to adjust the axial position, so that the bellows 6 can adapt to valve stems 3 of different lengths.

[0035] As attached Figure 2 As shown, the outer periphery of the connecting plate 7 is provided with a plurality of screw holes 22, and each screw hole 22 is threadedly connected with a push rod 23. The rotation of the connecting plate 7 is achieved by acting on the push rod 23, and the operation is very convenient and labor-saving.

[0036] As attached Figure 2 As shown, a locking ring 24 is also threadedly connected to the threaded section 21 of the valve stem 3, and a resistance-increasing convex pattern 25 is provided on the outer periphery of the locking ring 24, and the locking ring 24 is tightly pressed against the connecting disk 7. The locking ring 24 is pressed against the connecting disk 7, which can increase the friction between the connecting disk 7 and the threaded section 21, thereby preventing the connecting disk 7 from loosening.

[0037] As attached Figure 2 As shown, the upper end of the valve flap 4 is provided with a thread groove 26, the threaded section 21 of the valve stem 3 is threadedly connected to the thread groove 26, and the threaded section 21 on the valve flap 4 is locked and connected with the valve flap 4 through a transverse pin 27. The connection structure of this design is simple, reliable and has good firmness.

[0038] Embodiment 2 is different from embodiment 1. Figure 4 and attached Figure 5 As shown, in this embodiment, a mounting groove 28 is provided in the valve body 1, and the valve seat 5 is locked and connected in the mounting groove 28 by a plurality of locking screws 29 inside the valve body 1, and a sealing gasket 30 is sandwiched between the valve seat 5 and the mounting groove 28, wherein the locking screw 29 is screwed in from the bottom, and the locking screw 29 does not penetrate the valve seat 5. The valve seat 5 adopts a detachable structure, which is convenient for the replacement of the valve seat 5 at a later stage. At the same time, since the valve seat 5 is not threaded or welded inside the valve body 1, it is locked in the mounting groove 28 by the locking screw 29, which can greatly reduce the damage inside the valve body 1 and improve the service life of the valve.

Claims

1. A bellows stop valve, comprising a valve body (1), a valve cover (2), a valve stem (3) and a valve flap (4), wherein the valve cover (2) is mounted on the upper part of the valve body (1), the valve stem (3) penetrates the valve cover (2) and extends into the interior of the valve body (1) to be linked with the valve flap (4), and a valve seat (5) is provided inside the valve body (1) to abut against the valve flap (4) to form a sealing fit when the valve is closed; Features: The valve body (1) further comprises a bellows (6), a connecting plate (7) and a plurality of quick connectors (8). The bellows (6) is sleeved on the outer periphery of the valve stem (3). The bellows (6) is provided with an upper connecting flange (9) and a lower connecting flange (10) at the upper and lower ends respectively. The upper connecting flange (9) is provided with a connecting portion (31) extending toward the outer periphery. The outer edge of the connecting portion (31) is clamped between the valve cover (2) and the valve body (1). The connecting plate (7) is installed at the valve stem (3) corresponding to the lower connecting flange (10). At the bottom, the quick connector (8) comprises a vertical plate (11) and a first horizontal plate (12), a second horizontal plate (13) and a third horizontal plate (14) arranged parallel to the vertical plate (11); a slide groove (15) is formed between the first horizontal plate (12) and the second horizontal plate (13) for the outer edge of the lower connecting flange (10) to be embedded; a slot (16) is provided on the connecting plate (7) for the third horizontal plate (14) to be inserted, and the third horizontal plate (14) is interference fit with the slot (16).

2. A bellows stop valve according to claim 1, Features: The inner circumferential surface of the lower connecting flange (10) is provided with a sealing ring (17) for forming a sealing fit with the outer circumferential surface of the valve stem (3).

3. A bellows stop valve according to claim 1, Features: An anti-loosening protrusion (18) is provided in the slot (16), and an anti-loosening recess (19) which matches the anti-loosening protrusion (18) is provided on the third transverse plate (14).

4. A bellows stop valve according to claim 1, Features: The outer side of the vertical plate (11) is provided with reinforcing ribs (20) in the vertical direction.

5. A bellows stop valve according to claim 1, Features: The inner end of the valve stem (3) is provided with a threaded section (21), and the connecting plate (7) is threadedly connected to the threaded section (21).

6. A bellows stop valve according to claim 5, Features: The outer periphery of the connecting plate (7) is provided with a plurality of screw holes (22), and each screw hole (22) is threadedly connected with a push rod (23).

7. A bellows stop valve according to claim 5, Features: A locking ring (24) is also threadedly connected to the threaded section (21) of the valve stem (3), and a resistance-increasing convex pattern (25) is provided on the outer periphery of the locking ring (24). The locking ring (24) is tightly pressed against the connecting plate (7).

8. The bellows stop valve according to claim 1, Features: A thread groove (26) is provided at the upper end of the valve flap (4), the threaded section (21) of the valve stem (3) is threadedly connected to the thread groove (26), and the threaded section (21) on the valve flap (4) and the valve flap (4) are locked together via a transverse pin (27).

9. The bellows stop valve according to claim 1, Features: The valve body (1) is provided with a mounting groove (28), and the valve seat (5) is locked and connected to the mounting groove (28) inside the valve body (1) via a plurality of locking screws (29), and a sealing gasket (30) is sandwiched between the valve seat (5) and the mounting groove (28).

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