High-reliability corrosion-resistant center line fluorine-lined butterfly valve

Abstract

The utility model provides a high-reliability corrosion-resistant center line fluorine-lined butterfly valve which comprises a valve body with a valve cavity, a butterfly plate is arranged in the valve cavity, an upper rod installing hole is formed in the top face of the valve body, an upper valve rod is arranged in the upper rod installing hole in a penetrating mode, the bottom of the upper valve rod is connected with the butterfly plate, and a driving mechanism is arranged on the valve body and comprises a box shell with an inner cavity. An input shaft with one end extending out of the box shell and coaxially provided with a hand wheel is rotationally arranged in the inner cavity, an input bevel gear located in the inner cavity is coaxially arranged on the input shaft, and an output bevel gear meshed with the input bevel gear is coaxially arranged at the end, extending into the inner cavity, of the upper valve rod. The high-reliability corrosion-resistant center line fluorine-lined butterfly valve has the advantages of being reliable in rotation and convenient to rotate.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a highly reliable and corrosion-resistant center-line fluorine-lined butterfly valve. Background Technique

[0002] A butterfly valve, also called a flap valve, is a simple-structured regulating valve. A butterfly valve means that the closing member (valve flap or butterfly plate) is a disc, and it rotates around the valve shaft to achieve opening and closing. As a component used to realize the on-off and flow control of a pipeline system, butterfly valves have been extremely widely used in many fields such as petroleum, chemical industry, metallurgy, hydropower, etc. Butterfly valves include center-line butterfly valves and eccentric butterfly valves. The structural feature of a center-line butterfly valve is that the axis of the valve stem, the center of the butterfly plate, and the center of the body are in the same position. The structural feature of an eccentric butterfly valve is that the axis of the valve stem deviates from the center of the disc and the center of the body at the same time.

[0003] A fluorine-lined butterfly valve is a special valve applied to pipelines with strongly corrosive media. By lining the inner layer of the valve body, it improves the reliability and corrosion resistance of the butterfly valve and prolongs the service life of the butterfly valve. The inner layer material of the fluorine-lined butterfly valve is a fluorine material, such as polyvinyl fluoride, polytetrafluoroethylene, etc.

[0004] The existing Chinese patent with the authorized announcement number CN115929924B discloses a negative-pressure-resistant structure fluorine-lined butterfly valve, which includes a valve body. A valve seat is provided in the inner cavity of the valve body, and the inner cavity surface is lined with an inner cavity Teflon layer. The valve seat is provided with an elastic compensation part, and the inner cavity Teflon layer adheres to the elastic compensation part; a valve plate, the surface of the valve plate is lined with a valve plate Teflon layer, the valve plate includes a contact part, and the contact part is arranged along the circumference of the valve plate; a valve stem, the valve stem is connected to the valve plate, and the valve plate is driven by the valve stem to rotate in the inner cavity of the valve body. The valve stem includes a main valve stem and a secondary valve stem. The main valve stem is connected to one end of the valve plate, and the secondary valve stem is connected to the other end of the valve plate. The main valve stem and the secondary valve stem are coaxially arranged.

[0005] The above-mentioned existing technical solutions have the following defects: When this negative-pressure-resistant structure fluorine-lined butterfly valve works, workers rotate the valve plate through the main valve stem, and there is a technical problem that the main valve stem of this negative-pressure-resistant structure fluorine-lined butterfly valve is inconvenient to rotate. Content of the Utility Model

[0006] The problem to be solved by the utility model is to provide a highly reliable and corrosion-resistant center-line fluorine-lined butterfly valve for the above-mentioned deficiencies in the prior art, which solves the problem of inconvenient rotation existing in the prior art.

[0007] The above-mentioned utility model object of the present utility model is achieved through the following technical solutions: A highly reliable and corrosion-resistant center line fluorine-lined butterfly valve, including a valve body with a valve cavity, a butterfly plate is arranged in the valve cavity, an upper mounting rod hole is opened on the top surface of the valve body, an upper valve rod with the bottom connected to the butterfly plate is penetrated in the upper mounting rod hole, a driving mechanism is arranged on the valve body, the driving mechanism includes a box shell with an inner cavity, an input shaft with one end extending out of the box shell and coaxially provided with a handwheel is rotatably arranged in the inner cavity, an input bevel gear coaxial with the input shaft is arranged in the inner cavity, and an output bevel gear meshing with the input bevel gear is coaxially arranged at the end of the upper valve rod extending into the inner cavity.

[0008] The present utility model is further arranged as follows: A left opening communicating with the inner cavity is opened on the outer side wall of the box shell, a left shell cover for closing the left opening is arranged on the outer side wall of the box shell, a left groove for the input shaft to pass through and an output shaft hole are successively opened on the end surface of the left shell cover facing the inner cavity in the direction away from the inner cavity, and a left bearing sleeved on the input shaft is embedded in the left groove.

[0009] The present utility model is further arranged as follows: A left positioning ring is arranged on the end surface of the left shell cover facing the box shell, and the left positioning ring is in interference fit with the left opening.

[0010] The present utility model is further arranged as follows: A right opening communicating with the inner cavity is opened on the outer side wall of the box shell, a right shell cover for closing the right opening is arranged on the outer side wall of the box shell, a right groove is opened on the end surface of the right shell cover facing the inner cavity, and a right bearing sleeved on the input shaft is embedded in the right groove.

[0011] The present utility model is further arranged as follows: A right positioning ring is arranged on the end surface of the right shell cover facing the box shell, and the right positioning ring is in interference fit with the right opening.

[0012] The present utility model is further arranged as follows: A lower opening communicating with the inner cavity is opened on the bottom surface of the box shell, a lower shell cover for closing the lower opening is arranged on the bottom surface of the box shell, an upper groove for the upper valve rod to pass through, a connection hole and a lower groove are successively opened on the end surface of the lower shell cover facing the inner cavity in the direction away from the inner cavity, an upper bearing sleeved on the upper valve rod is embedded in the upper groove, a lower bearing sleeved on the upper valve rod is embedded in the lower groove, and the bottom surface of the lower shell cover abuts against the top surface of the valve body.

[0013] The present utility model is further arranged as follows: An upper connecting rod hole for inserting the upper valve rod is opened on the top surface of the butterfly plate, an outer sales hole communicating with the upper connecting rod hole is opened on the side wall of the butterfly plate, an inner sales hole aligned with the outer sales hole is opened at the bottom of the upper valve rod, and a tapered pin is penetrated in the outer sales hole and the inner sales hole.

[0014] The present utility model is further configured as follows: an upper sealing groove is formed at the top of the valve cavity, and an upper pressing ring and an upper disc spring are embedded in the upper sealing groove. The upper pressing ring is located below the upper disc spring, and the upper pressing ring and the upper disc spring are sleeved on the upper valve stem.

[0015] The present utility model is further configured as follows: a lower connecting rod hole coaxial with the upper connecting rod hole is formed on the bottom surface of the butterfly plate. A bottom threaded hole and a lower mounting rod hole are sequentially formed upward on the bottom surface of the valve body. A lower valve stem whose top is inserted into the lower connecting rod hole is rotatably arranged in the lower mounting rod hole, and a bottom cover for restricting the downward movement of the lower valve stem is threadedly connected in the bottom threaded hole.

[0016] The present utility model is further configured as follows: a lower sealing groove is formed at the bottom of the valve cavity, and a lower pressing ring and a lower disc spring are embedded in the lower sealing groove. The lower pressing ring is located directly above the lower disc spring, and the lower pressing ring and the lower disc spring are sleeved on the lower valve stem.

[0017] To sum up, the beneficial technical effects of the present utility model are as follows: Workers rotate the input shaft through the handwheel, thereby driving the input bevel gear to rotate. Since an output bevel gear meshing with the input bevel gear is coaxially arranged at the top of the upper valve stem, the upper valve stem rotates accordingly, and then drives the butterfly plate to rotate. This highly reliable and corrosion-resistant center line fluorine-lined butterfly valve has the advantages of reliable rotation and convenient rotation. Description of the Drawings

[0018] Figure 1 is a schematic cross-sectional structure view of the highly reliable and corrosion-resistant center line fluorine-lined butterfly valve in the present utility model;

[0019] Figure 2 is a schematic cross-sectional structure view of the valve body in the present utility model;

[0020] Figure 3 is a schematic cross-sectional structure view of the driving mechanism in the present utility model.

[0021] In the above-mentioned drawings: 1. Valve body; 2. Valve cavity; 3. Upper sealing groove; 4. Upper pressure ring; 5. Upper disc spring; 6. Lower sealing groove; 7. Lower pressure ring; 8. Lower disc spring; 9. Butterfly plate; 10. Upper connecting rod hole; 11. Outer sales hole; 12. Upper mounting rod hole; 13. Upper valve rod; 14. Inner sales hole; 15. Taper pin; 16. Lower connecting rod hole; 17. Bottom threaded hole; 18. Lower mounting rod hole; 19. Lower valve rod; 20. Bottom cover; 21. Driving mechanism; 22. Box shell; 23. Inner cavity; 24. Left opening; 25. Right opening; 26. Lower opening; 27. Left shell cover; 28. Left groove; 29. Output shaft hole; 30. Left positioning ring; 31. Right shell cover; 32. Right groove; 33. Right positioning ring; 34. Input shaft; 341. Handwheel; 35. Input bevel gear; 36. Left bearing; 37. Right bearing; 38. Lower shell cover; 39. Lower positioning ring; 40. Upper groove; 41. Connecting hole; 42. Lower groove; 43. Output bevel gear; 44. Upper bearing; 45. Lower bearing; 46. Lower flanging; 47. Upper flanging. Detailed implementation mode

[0022] In order to make the technical means, creative features, achieved purposes and functions realized by the present utility model clearer and easier to understand, the present utility model will be further described below in conjunction with the drawings and specific implementation modes.

[0023] As Figure 1 shown, the present utility model provides a highly reliable and corrosion-resistant mid-line fluorine-lined butterfly valve, which includes a valve body 1 having a valve cavity 2, and the valve body 1 includes an upper valve body 1 and a lower valve body 1 connected by bolts.

[0024] As Figure 2 shown, an upper sealing groove 3 is opened at the top of the valve cavity 2, and an upper pressure ring 4 and an upper disc spring 5 are embedded in the upper sealing groove 3, and the upper pressure ring 4 is located below the upper disc spring 5. A lower sealing groove 6 is opened at the bottom of the valve cavity 2, the lower sealing groove 6 is directly below the upper sealing groove 3, and a lower pressure ring 7 and a lower disc spring 8 are embedded in the lower sealing groove 6, and the lower pressure ring 7 is located directly above the lower disc spring 8. The surface of the valve cavity 2 is lined with a fluorine-lined layer formed of polytetrafluoroethylene, and the fluorine-lined layer closes the upper sealing groove 3 and the lower sealing groove 6, and this highly reliable and corrosion-resistant mid-line fluorine-lined butterfly valve has the advantage of corrosion resistance.

[0025] As Figure 2 shown, a butterfly plate 9 is arranged in the valve cavity 2, and the surface of the butterfly plate 9 is lined with a fluorine-lined layer formed of polytetrafluoroethylene.

[0026] As Figure 2As shown in the figure, an upper connecting rod hole 10 is formed on the top surface of the butterfly plate 9, and two outer sales holes 11 communicating with the upper connecting rod hole 10 are formed through the side wall of the butterfly plate 9. An upper mounting rod hole 12 is formed through the top surface of the valve body 1, an upper valve rod 13 is rotatably arranged in the upper mounting rod hole 12, an upper pressure ring 4 and an upper disc spring 5 are sleeved on the upper valve rod 13, the bottom of the upper valve rod 13 is inserted into the upper connecting rod hole 10, two inner pin holes 14 aligned with the outer sales holes 11 are formed at the bottom of the upper valve rod 13, and a tapered pin 15 is inserted through the outer sales holes 11 and the inner pin holes 14. The tapered pin 15 is in interference fit with both the outer sales holes 11 and the inner pin holes 14.

[0027] As Figure 2 shown, a lower connecting rod hole 16 is formed on the bottom surface of the butterfly plate 9, and the lower connecting rod hole 16 is coaxially arranged with the upper connecting rod hole 10. A bottom threaded hole 17 and a lower mounting rod hole 18 are formed upward in sequence on the bottom surface of the valve body 1. A lower valve rod 19 is rotatably arranged in the lower mounting rod hole 18. The top of the lower valve rod 19 is inserted and matched with the lower connecting rod hole 16. A lower pressure ring 7 and a lower disc spring 8 are sleeved on the lower valve rod 19. A bottom cover 20 is threadedly connected in the bottom threaded hole 17, and the bottom cover 20 is used to limit the downward movement of the lower valve rod 19.

[0028] As Figure 1 and 3 shown, a driving mechanism 21 is arranged above the valve body 1. The driving mechanism 21 is used to drive the upper valve rod 13 to rotate, and then drive the butterfly plate 9 to rotate. The driving plate mechanism includes a box shell 22 with an inner cavity 23. Left openings 24 and right openings 25 communicating with the inner cavity 23 are formed on the outer side wall of the box shell 22, and a lower opening 26 communicating with the inner cavity 23 is formed on the bottom surface of the box shell 22.

[0029] As Figure 3 shown, a left shell cover 27 for closing the left opening 24 is screwed on the outer side wall of the box shell 22. On the end surface of the left shell cover 27 facing the inner cavity 23, a left groove 28 and a shaft outlet hole 29 are formed in sequence in the direction away from the inner cavity 23. The cross-sections of both the left groove 28 and the shaft outlet hole 29 are circular. The diameter of the shaft outlet hole 29 is smaller than the diameter of the left groove 28. A left positioning ring 30 is integrally connected to the end surface of the left shell cover 27 facing the box shell 22. The left positioning ring 30 is circular, and the left positioning ring 30 is in interference fit with the left opening 24.

[0030] As Figure 3 shown, a right shell cover 31 for closing the right opening 25 is screwed on the outer side wall of the box shell 22. A right groove 32 is formed on the end surface of the right shell cover 31 facing the inner cavity 23. The cross-section of the right groove 32 is circular. A right positioning ring 33 is integrally connected to the end surface of the right shell cover 31 facing the box shell 22. The right positioning ring 33 is circular, and the right positioning ring 33 is in interference fit with the right opening 25.

[0031] As Figure 3As shown, an input shaft 34 is rotatably arranged in the inner cavity 23. The end of the input shaft 34 close to the left housing cover 27 sequentially passes through the left groove 28 and the output shaft hole 29 and is connected with a handwheel 341. An input bevel gear 35 is coaxially arranged on the input shaft 34, and the input bevel gear 35 is located in the inner cavity 23. A left bearing 36 is embedded in the left groove 28, and a right bearing 37 is embedded in the right groove 32. Both the left bearing 36 and the right bearing 37 are sleeved on the input shaft 34. The left bearing 36 and the right bearing 37 are used to jointly support the rotation of the input shaft 34, so that the input shaft 34 can rotate relatively stably.

[0032] As Figure 3 shown, a lower housing cover 38 for closing the lower opening 26 is screwed to the bottom surface of the housing 22. An integrally connected lower positioning ring 39 that is fitted with the lower opening 26 is provided on the end surface of the lower housing cover 38 facing the housing 22. An upper groove 40, a connection hole 41, and a lower groove 42 are sequentially formed on the end surface of the lower housing cover 38 facing the inner cavity 23 in a direction away from the inner cavity 23. The cross-sections of the upper groove 40, the connection hole 41, and the lower groove 42 are all circular. The diameters of the upper groove 40 and the lower groove 42 are both larger than the aperture of the connection hole 41. The top of the upper valve stem 13 is coaxially provided with an output bevel gear 43 that meshes with the input bevel gear 35. The bottom of the upper valve stem 13 sequentially passes through the upper groove 40, the connection hole 41, and the lower groove 42.

[0033] As Figure 3 shown, an upper bearing 44 is embedded in the upper groove 40, and a lower bearing 45 is embedded in the lower groove 42. Both the upper bearing 44 and the lower bearing 45 are sleeved on the upper valve stem 13. The upper bearing 44 and the lower bearing 45 are used to jointly support the rotation of the upper valve stem 13, so that the upper valve stem 13 can rotate relatively stably.

[0034] As Figure 3 shown, the bottom surface of the lower housing cover 38 abuts against the top surface of the valve body 1, and the valve body 1 presses and fixes the lower bearing 45 in the lower groove 42. A lower flanging 46 extends outward from the top of the outer side wall of the valve body 1, and an upper flanging 47 extends outward from the bottom of the outer side wall of the lower housing cover 38. The lower flanging 46 and the upper flanging 47 are fixedly connected by bolts.

[0035] The detailed working process of this embodiment is as follows: The worker rotates the input shaft 34 through the handwheel 341, thereby driving the input bevel gear 35 to rotate. Since the output bevel gear 43 that meshes with the input bevel gear 35 is coaxially arranged at the top of the upper valve stem 13, the upper valve stem 13 rotates accordingly, and then drives the butterfly plate 9 to rotate. This highly reliable and corrosion-resistant center-line fluorine-lined butterfly valve has the advantages of reliable rotation and convenient rotation.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A high-reliability, corrosion-resistant, center-line fluorine-lined butterfly valve, comprising a valve body (1) having a valve cavity (2), characterized in that: A butterfly plate (9) is arranged in the valve cavity (2); an upper mounting rod hole (12) is opened on the top surface of the valve body (1); an upper valve rod (13) whose bottom is connected to the butterfly plate (9) passes through the upper mounting rod hole (12); a driving mechanism (21) is arranged on the valve body (1); the driving mechanism (21) comprises a casing (22) having an inner cavity (23); an input shaft (34) having one end extending out of the casing (22) and coaxially provided with a hand wheel (341) is rotatably arranged in the inner cavity (23); an input bevel gear (35) located in the inner cavity (23) is coaxially arranged on the input shaft (34); and an output bevel gear (43) meshing with the input bevel gear (35) is coaxially arranged at the end of the upper valve rod (13) extending into the inner cavity (23).

2. According to claim 1, a high reliability corrosion-resistant center line fluorine lined butterfly valve is characterized by: The outer wall of the box shell (22) is provided with a left opening (24) communicating with the inner cavity (23); the outer wall of the box shell (22) is provided with a left shell cover (27) closing the left opening (24); the left shell cover (27) is provided with a left groove (28) and a shaft outlet hole (29) in sequence on an end surface facing the inner cavity (23) in a direction away from the inner cavity (23) for the input shaft (34) to pass through; a left bearing (36) fitted on the input shaft (34) is embedded in the left groove (28).

3. According to claim 2, a high reliability corrosion-resistant center line fluorine lined butterfly valve is characterized by: A left positioning ring (30) is provided on the end surface of the left shell cover (27) facing the box shell (22), and the left positioning ring (30) is engaged with the left opening (24).

4. According to claim 1, a high reliability corrosion-resistant center line fluorine lined butterfly valve is characterized by: The outer wall of the box shell (22) is provided with a right opening (25) communicating with the inner cavity (23); the outer wall of the box shell (22) is provided with a right shell cover (31) closing the right opening (25); the end surface of the right shell cover (31) facing the inner cavity (23) is provided with a right groove (32); the right groove (32) is embedded with a right bearing (37) mounted on the input shaft (34).

5. According to claim 4, a high reliability corrosion-resistant center line fluorine lined butterfly valve is characterized by: A right positioning ring (33) is provided on the end surface of the right shell cover (31) facing the box shell (22), and the right positioning ring (33) is engaged with the right opening (25).

6. According to claim 1, a high reliability corrosion-resistant center line fluorine lined butterfly valve is characterized by: A lower opening (26) communicating with the inner cavity (23) is provided on the bottom surface of the box shell (22), and a lower shell cover (38) closing the lower opening (26) is provided on the bottom surface of the box shell (22). An upper groove (40), a connecting hole (41), and a lower groove (42) for the upper valve stem (13) to pass through are provided on the end surface of the lower shell cover (38) facing the inner cavity (23) in a direction away from the inner cavity (23). An upper bearing (44) mounted on the upper valve stem (13) is embedded in the upper groove (40), and a lower bearing (45) mounted on the upper valve stem (13) is embedded in the lower groove (42). The bottom surface of the lower shell cover (38) abuts against the top surface of the valve body (1).

7. According to claim 1, a high reliability corrosion-resistant center line fluorine lined butterfly valve is characterized by: An upper connecting rod hole (10) for plugging into an upper valve stem (13) is formed on the top surface of the butterfly plate (9), an outer pin hole (11) communicating with the upper connecting rod hole (10) is formed on the side wall of the butterfly plate (9), an inner pin hole (14) aligned with the outer pin hole (11) is formed on the bottom of the upper valve stem (13), and conical pins (15) are inserted into the outer pin hole (11) and the inner pin hole (14).

8. According to claim 1, a high reliability corrosion-resistant center line fluorine lined butterfly valve is characterized by: An upper sealing groove (3) is provided at the top of the valve cavity (2), and an upper pressure ring (4) and an upper disc spring (5) are embedded in the upper sealing groove (3). The upper pressure ring (4) is located below the upper disc spring (5), and the upper pressure ring (4) and the upper disc spring (5) are mounted on the upper valve stem (13).

9. According to claim 1, a high reliability corrosion-resistant center line fluorine lined butterfly valve is characterized by: A lower connecting rod hole (16) coaxial with the upper connecting rod hole (10) is provided on the bottom surface of the butterfly plate (9); a bottom threaded hole (17) and a lower mounting rod hole (18) are provided on the bottom surface of the valve body (1) in sequence upward; a lower valve stem (19) whose top is plugged into the lower connecting rod hole (16) is rotatably arranged in the lower mounting rod hole (18); a bottom cover (20) for limiting the downward movement of the lower valve stem (19) is threadedly connected to the bottom threaded hole (17).

10. The high reliability corrosion resistant center line fluorine lined butterfly valve according to claim 1 is characterized by: A lower sealing groove (6) is provided at the bottom of the valve cavity (2), and a lower pressure ring (7) and a lower disc spring (8) are embedded in the lower sealing groove (6). The lower pressure ring (7) is located directly above the lower disc spring (8), and the lower pressure ring (7) and the lower disc spring (8) are mounted on the lower valve stem (19).

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