Lug type butterfly valve

Abstract

The utility model discloses a lug type butterfly valve which comprises a valve seat, a shaft sleeve is fixedly connected to the top of the valve seat, a valve rod is rotationally connected to the interior of the shaft sleeve through a bearing, the bottom end of the valve rod extends into the valve seat, a detachable valve plate assembly is fixed to the position, located in the valve seat, of the surface of the valve rod, and a top shell is fixed to the top end of the shaft sleeve. The top end of the valve rod extends into the top shell. According to the utility model, the valve seat, the shaft sleeve, the valve rod, the valve plate assembly, the top shell and the driving assembly are arranged, the valve plate assembly adopts a split type design and consists of two semicircular plates, the adjacent sides of the two semicircular plates are fixedly provided with the mounting sleeves, the two semicircular plates are sleeved on the surface of the valve rod through the mounting sleeves, and then the two semicircular plates are fixedly mounted through the flanges and the bolts; therefore, the valve plate of the butterfly valve can be more conveniently disassembled and assembled during later maintenance, the driving assembly is driven in the mode that the small gear drives the large gear to rotate, and more labor is saved when the valve is opened and closed.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a lug-type butterfly valve. Background Art

[0002] A lug-type butterfly valve is a type of butterfly valve characterized by lugs on the valve disc that support and position the valve. Lug-type butterfly valves offer excellent sealing properties, pressure resistance, and service life, and are widely used in pipelines carrying a variety of media, including liquids and gases. Advantages of lug-type butterfly valves include: excellent sealing. Lug-type butterfly valves use an elastic material as a sealing material, which, when combined with the valve seat, achieves a good sealing effect; and long service life. Lug-type butterfly valves have a simple structure, are easy to operate, have a long service life, and have low installation and maintenance costs. Lug-type butterfly valves are also corrosion-resistant and high-temperature resistant. Lug-type butterfly valves can be made of materials that can withstand highly corrosive and high-temperature media.

[0003] The internal structure of a lug-type butterfly valve includes a valve stem and a valve plate. The valve stem can be rotated by a handle on the top, and the valve stem drives the valve plate to rotate. However, because the valve plate of existing lug-type butterfly valves is a one-piece structure, it is inconvenient to directly remove the valve plate from the valve seat when the valve is maintained, making subsequent maintenance or replacement more troublesome. Therefore, to address the above shortcomings, the present utility model proposes a lug-type butterfly valve. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a lug-type butterfly valve.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a lug-type butterfly valve, comprising a valve seat, a shaft sleeve fixedly connected to the top of the valve seat, a valve stem rotatably connected to the inside of the shaft sleeve through a bearing, the bottom end of the valve stem extends into the inside of the valve seat, a detachable valve plate assembly is fixed on the surface of the valve stem and located inside the valve seat, a top shell is fixed to the top of the shaft sleeve, the top end of the valve stem extends to the inside of the top shell, and a drive assembly for driving the valve stem to rotate is provided inside the top shell.

[0006] Furthermore, a plurality of connecting lugs are fixed to the outer side wall of the valve seat.

[0007] Furthermore, a sealing ring is provided between the valve stem and the inner wall of the sleeve.

[0008] Furthermore, the valve plate assembly includes two symmetrical semicircular plates, and a semicircular mounting sleeve is fixed on the side of the two semicircular plates close to the valve stem, and the mounting sleeve is sleeved on the surface of the valve stem. Flanges are fixed on both sides of the middle part of the two mounting sleeves, and a connecting hole is opened in the middle part of the flange, and bolts are connected in the flange connecting holes on the two mounting sleeves.

[0009] Furthermore, a positioning groove is provided in the middle of the inner wall of the two mounting sleeves, and a positioning protrusion is fixed on the outer wall of the valve stem, and the positioning protrusion can be snapped into the inside of the positioning groove.

[0010] Furthermore, a slot is provided on one side of the two semicircular plates that are away from each other, and a sealing strip is fixedly connected inside the slot.

[0011] Furthermore, the drive assembly includes a driven gear fixed to the top of the valve stem and a vertical shaft passing through the top wall of the top shell. The vertical shaft is rotatably connected to the top wall of the top shell through a bearing. A driving gear is fixed to the bottom end of the vertical shaft, and the driving gear is engaged with the driven gear. The size of the driving gear is smaller than that of the driven gear. A handle is fixed to the top of the vertical shaft, and a screw is passed through and threadedly connected to the side wall of the top shell. An extrusion block is fixed to one end of the screw located inside the top shell, and a knob is fixed to one end of the screw located outside the top shell.

[0012] Beneficial effects of the utility model:

[0013] When the utility model is in use, the lug-type butterfly valve is provided with a valve seat, a shaft sleeve, a valve stem, a valve plate assembly, a top shell and a drive assembly. The valve plate assembly adopts a split design and is composed of two semicircular plates. Adjacent sides of the two semicircular plates are fixedly provided with mounting sleeves, which are sleeved on the surface of the valve stem through the mounting sleeves and then fixed and installed through flanges and bolts. Therefore, the valve plate of the butterfly valve can be more conveniently disassembled and assembled during later maintenance, and the drive assembly adopts a small gear to drive the large gear to rotate, which is more labor-saving when opening and closing the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for use in the description of the specific implementation methods. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 : An overall cross-sectional view of the utility model;

[0016] Figure 2 : A three-dimensional diagram of the valve plate assembly of the present invention;

[0017] Figure 3 : A top sectional view of the present utility model.

[0018] The reference numerals are as follows:

[0019] 1. Valve seat; 2. Bushing; 3. Valve stem; 31. Positioning bump; 4. Valve plate assembly; 41. Semicircular plate; 42. Mounting sleeve; 43. Flange; 44. Slot; 45. Sealing strip; 46. Positioning groove; 5. Top shell; 6. Drive assembly; 61. Driven gear; 62. Vertical shaft; 63. Driving gear; 64. Screw; 65. Extrusion block; 7. Sealing ring; 8. Connecting lug. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figure 1-Figure 3 As shown, it relates to a lug-type butterfly valve, including a valve seat 1, a shaft sleeve 2 is fixedly connected to the top of the valve seat 1, a valve stem 3 is rotatably connected to the inside of the shaft sleeve 2 through a bearing, the bottom end of the valve stem 3 extends to the inside of the valve seat 1, a detachable valve plate assembly 4 is fixed on the surface of the valve stem 3 and located inside the valve seat 1, a top shell 5 is fixed to the top of the shaft sleeve 2, the top end of the valve stem 3 extends to the inside of the top shell 5, and a driving assembly 6 for driving the valve stem 3 to rotate is provided inside the top shell 5.

[0022] A plurality of connecting lugs 8 are fixed to the outer side wall of the valve seat 1. The valve can be connected to a pipeline through the connecting lugs 8.

[0023] A sealing ring 7 is provided between the valve stem 3 and the inner wall of the shaft sleeve 2 .

[0024] The sealing ring 7 can increase the sealing performance between the valve stem 3 and the shaft sleeve 2.

[0025] The valve plate assembly 4 includes two symmetrical semicircular plates 41. A semicircular mounting sleeve 42 is fixed to one side of the two semicircular plates 41 close to the valve stem 3, and the mounting sleeve 42 is sleeved on the surface of the valve stem 3. Flanges 43 are fixed on both sides of the middle of the two mounting sleeves 42, and a connecting hole is opened in the middle of the flange 43. Bolts are connected to the connecting holes of the flanges 43 on the two mounting sleeves 42.

[0026] The two semicircular plates 41 can be fixed to the surface of the valve stem 3 through the mounting sleeve 42. Therefore, when the semicircular plates 41 of the valve plate assembly 4 need to be maintained and replaced later, the bolts of the connecting flange 43 can be removed and the semicircular plates 41 can be removed from the surface of the valve stem 3, making the disassembly and installation of the valve plate assembly 4 simpler and more convenient.

[0027] A positioning groove 46 is formed in the middle of the inner wall of each of the two mounting sleeves 42 . A positioning protrusion 31 is fixed to the outer wall of the valve stem 3 , and the positioning protrusion 31 can be snap-fitted into the inner part of the positioning groove 46 .

[0028] After the mounting sleeve 42 is sleeved on the surface of the valve stem 3 , it can be positioned by snapping the positioning protrusion 31 into the positioning groove 46 .

[0029] A slot 44 is formed on each side of the two semicircular plates 41 away from each other, and a sealing strip 45 is fixedly connected inside the slot 44 .

[0030] The sealing strip 45 can improve the sealing between the semicircular plate 41 and the inner wall of the valve seat 1 .

[0031] The driving assembly 6 includes a driven gear 61 fixed to the top of the valve stem 3 and a vertical shaft 62 that passes through the top wall of the top shell 5. The vertical shaft 62 is rotatably connected to the top wall of the top shell 5 through a bearing. A driving gear 63 is fixed to the bottom end of the vertical shaft 62, and the driving gear 63 is engaged with the driven gear 61. The size of the driving gear 63 is smaller than that of the driven gear 61. A handle is fixed to the top of the vertical shaft 62, and a screw 64 passes through and is threadedly connected to the side wall of the top shell 5. An extrusion block 65 is fixed to one end of the screw 64 located inside the top shell 5, and a knob is fixed to one end of the screw 64 located outside the top shell 5.

[0032] By turning the vertical shaft 62 by the handle, the driving gear 63 can drive the driven gear 61 to rotate, thereby driving the valve stem 3 to rotate. The valve stem 3 then drives the valve plate assembly 4 to rotate inside the valve seat 1, thereby opening or closing the valve. Due to the small gear ratio between the driving gear 63 and the driven gear 61, turning the handle is more labor-saving. When opening or closing is completed, the screw 64 can be rotated by turning the knob, causing the extrusion block 65 to press against the surface of the vertical shaft 62, thereby locking the vertical shaft 62 to prevent loosening.

[0033] Working Principle: To open or close the valve, the handle on the top of the top shell 5 rotates the vertical shaft 62, which drives the valve stem 3 and valve plate assembly 4 to slowly rotate, opening and closing the valve. When the valve plate assembly 4 needs to be replaced or maintained, the bolts on the flange 43 are first removed, and then the valve stem 3 is rotated to make the semicircular plate 41 away from the inner wall of the valve seat 1. The semicircular plate 41 can be removed from the surface of the valve stem 3. During installation, the mounting sleeve 42 on the semicircular plate 41 is clamped onto the surface of the valve stem 3, and then the bolts are installed in the connecting holes of the flange 43.

[0034] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, numerous modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A lug-type butterfly valve, comprising a valve seat (1), characterized in that: The top of the valve seat (1) is fixedly connected to a shaft sleeve (2), the interior of the shaft sleeve (2) is rotatably connected to a valve stem (3) via a bearing, the bottom end of the valve stem (3) extends into the interior of the valve seat (1), a detachable valve plate assembly (4) is fixed on the surface of the valve stem (3) and located inside the valve seat (1), a top shell (5) is fixed to the top of the shaft sleeve (2), the top end of the valve stem (3) extends into the interior of the top shell (5), and a driving assembly (6) for driving the valve stem (3) to rotate is provided inside the top shell (5).

2. The lug-type butterfly valve according to claim 1, characterized in that: A plurality of connecting lugs (8) are fixed to the outer side wall of the valve seat (1).

3. The lug-type butterfly valve according to claim 1, characterized in that: A sealing ring (7) is provided between the valve stem (3) and the inner side wall of the shaft sleeve (2).

4. The lug-type butterfly valve according to claim 1, characterized in that: The valve plate assembly (4) includes two symmetrical semicircular plates (41), and a semicircular mounting sleeve (42) is fixed on one side of the two semicircular plates (41) close to the valve stem (3), and the mounting sleeve (42) is sleeved on the surface of the valve stem (3). Flanges (43) are fixed on both sides of the middle of the two mounting sleeves (42), and a connecting hole is opened in the middle of the flange (43), and bolts are connected in the connecting holes of the flanges (43) on the two mounting sleeves (42).

5. The lug-type butterfly valve according to claim 4, characterized in that: A positioning groove (46) is provided in the middle of the inner wall of each of the two mounting sleeves (42), and a positioning protrusion (31) is fixed on the outer wall of the valve stem (3), and the positioning protrusion (31) can be snap-fitted into the interior of the positioning groove (46).

6. The lug-type butterfly valve according to claim 4, characterized in that: A clamping groove (44) is provided on one side of the two semicircular plates (41) that is away from each other, and a sealing strip (45) is fixedly clamped inside the clamping groove (44).

7. The lug-type butterfly valve according to claim 1, characterized in that: The driving assembly (6) comprises a driven gear (61) fixed to the top of the valve stem (3) and a vertical shaft (62) penetrating the top wall of the top shell (5); the vertical shaft (62) is rotatably connected to the top wall of the top shell (5) via a bearing; a driving gear (63) is fixed to the bottom end of the vertical shaft (62), and the driving gear (63) is meshed with the driven gear (61); the size of the driving gear (63) is smaller than that of the driven gear (61); a handle is fixed to the top end of the vertical shaft (62); a screw (64) is passed through and threadedly connected to the side wall of the top shell (5); an extrusion block (65) is fixed to one end of the screw (64) located inside the top shell (5); and a knob is fixed to one end of the screw (64) located outside the top shell (5).

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