Butterfly valve with adjusting and limiting structure

Abstract

The utility model discloses a butterfly valve with an adjusting and limiting structure, which comprises a valve body, a valve rod is rotatably inserted in the valve body, a valve plate is fixedly connected on the outer wall of the valve rod, a sealing ring is clamped on the circumference of the valve plate, a valve seat is arranged on the inner wall of the circumference of the valve body, a valve seat pressing ring is arranged in the valve body, and a valve seat backing ring is arranged on one side of the valve seat pressing ring. A clamping groove is formed in one side of the valve seat backing ring, a first clamping hole is formed in the clamping groove, the clamping groove is connected with a valve seat backing ring limiting plate in a clamped mode, a second clamping hole is formed in one side of the valve seat backing ring limiting plate, and a cylindrical pin is connected among the valve seat pressing ring, the valve seat backing ring and the valve seat backing ring limiting plate in an inserted mode. According to the utility model, the valve seat backing ring limiting plate is clamped in the stepped clamping groove, so that the valve seat pressing ring limiting plate is embedded from the outer side and is matched with the stepped groove of the valve seat backing ring for installation, the installation mode can ensure that the valve seat backing ring limiting plate cannot fall off, and compared with welding, the assembly positioning is more accurate, and the assembly is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to butterfly valve technical field especially butterfly valve with adjusting limit structure. BACKGROUND

[0002] Three eccentric butterfly valve is a commonly used valve equipment, and currently three eccentric metal hard sealing technology has become mature, and bidirectional sealing technology has also been conquered. However, since the valve is in close contact with the sealing ring during sealing, and belongs to the sealing of the actuating mechanism, the force of the actuating mechanism will always act on the sealing ring, so the closed valve often appears the phenomenon of being choked.

[0003] In order to solve this problem, many companies have adopted a valve front limiting device, which stacks the limiting plate on the valve body to ensure the sealing position of the valve. This structure is fixed by stacking on the valve, which is not convenient for disassembly and maintenance, and the welding position is not accurate, and there is no positioning structure, which is judged by the welding worker, which is not conducive to limiting. UTILITY MODEL CONTENTS

[0004] The utility model discloses a butterfly valve with adjusting limit structure to solve the problem that the limiting plate is stacked on the valve body, which is not convenient for disassembly and maintenance, and the welding position is not accurate, and there is no positioning structure, which is judged by the welding worker, which is not conducive to limiting.

[0005] In order to achieve the above object, the utility model adopts the following technical scheme:

[0006] A butterfly valve with adjusting limit structure, including the valve body, the valve body is rotatably inserted with the valve rod, the outer wall of valve rod is fixedly connected with the valve plate, the circumference of valve plate is clamped with the sealing ring, the circumference inner wall of valve body is equipped with the valve seat, the valve body is equipped with the valve seat pressure ring, one side of valve seat pressure ring is equipped with the valve seat gasket ring, one side of valve seat gasket ring is equipped with the clamping groove, the first clamping hole is equipped in the clamping groove, the clamping groove is clamped with the valve seat gasket ring limiting plate, one side of valve seat gasket ring limiting plate is equipped with the second clamping hole, the cylindrical pin is inserted between valve seat pressure ring, valve seat gasket ring, valve seat gasket ring limiting plate, the circumference inner side of valve body is fixedly connected with the sealing ring pressure ring, one side of sealing ring pressure ring is equipped with the installation groove, the installation groove is clamped with the sealing ring pressure ring limiting plate, and the sealing ring pressure ring limiting plate is in contact with valve seat gasket ring limiting plate.

[0007] Further, the clamping groove is a stepped structure.

[0008] Further, the valve seat gasket ring limiting plate is a T-shaped structure.

[0009] Further, the sealing ring pressure ring limiting plate is an arc structure.

[0010] The utility model has the advantages of:

[0011] 1. The valve seat pad ring limiting plate is clamped in the stepped clamping groove, so that the valve seat pressing ring limiting plate is embedded from the outside and is installed in cooperation with the valve seat pad ring stepped groove, the installation mode can ensure that the valve seat pad ring limiting plate cannot fall out, compared with welding, the assembly positioning is more accurate, and assembly is facilitated.

[0012] 2. The sealing ring pressing ring limiting plate is connected with the sealing ring pressing ring through bolt fastening, the structure is convenient to install, can be installed last during assembly, does not affect other installation steps in front. The structure is on the valve rear surface, facilitating observation and disassembly and maintenance.

[0013] 3. The cylindrical pin is used for assembly, the position of the valve seat pad ring is fixed during valve operation, the position of the limiting structure is further ensured to be installed correctly, the valve seat pressing ring cannot be subjected to the thrust in the flow channel axis direction, the pressing ring is not loosened to cause flange external leakage and valve seat internal leakage, and the limiting structure is also ensured to be integrated with the valve body, when the valve plate reaches the limit position, the force borne by the limiting screw is directly applied to the valve body and the valve plate, and the limiting effect of the limiting plate is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A perspective structural schematic view of a butterfly valve with an adjusting limiting structure is provided for the utility model;

[0015] Figure 2 A sectional view structural schematic view of a butterfly valve with an adjusting limiting structure is provided for the utility model;

[0016] Figure 3 An enlarged structural schematic view of A of a butterfly valve with an adjusting limiting structure is provided for the utility model;

[0017] Figure 4 A valve seat pad ring structural schematic view of a butterfly valve with an adjusting limiting structure is provided for the utility model;

[0018] Figure 5 A valve seat pad ring limiting plate structural schematic view of a butterfly valve with an adjusting limiting structure is provided for the utility model;

[0019] Figure 6 A sealing ring pressing ring structural schematic view of a butterfly valve with an adjusting limiting structure is provided for the utility model;

[0020] Figure 7 A partial sealing ring pressing ring limiting plate structural schematic view of a butterfly valve with an adjusting limiting structure is provided for the utility model;

[0021] Figure 8 A sealing ring pressing ring installation structural schematic view of a butterfly valve with an adjusting limiting structure is provided for the utility model.

[0022] In the figure: 1, valve body; 2, valve plate; 3, valve stem; 4, sealing ring; 5, valve seat; 6, valve seat compression ring; 7, valve seat gasket ring; 701, clamping groove; 702, first clamping hole; 8, valve seat gasket ring limiting plate; 801, second clamping hole; 9, cylindrical pin; 10, sealing ring compression ring; 1001, mounting groove; 11, sealing ring compression ring limiting plate. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0024] Reference Figures 1-4 A butterfly valve with adjusting limiting structure, including valve body 1, valve stem 3 is inserted in valve body 1 and rotates, the outer wall of valve stem 3 is fixed with valve plate 2 by bolt, the circumference of valve plate 2 is connected with sealing ring 4, thereby sealing between valve plate 2 and valve body 1, the inner wall of the circumference of valve body 1 is equipped with valve seat 5, valve body 1 is equipped with valve seat compression ring 6, one side of valve seat compression ring 6 is equipped with valve seat gasket ring 7, one side of valve seat gasket ring 7 is equipped with clamping groove 701, first clamping hole 702 is equipped in clamping groove 701, clamping groove 701 is connected with valve seat gasket ring limiting plate 8, one side of valve seat gasket ring limiting plate 8 is equipped with second clamping hole 801, cylindrical pin 9 is inserted between valve seat compression ring 6, valve seat gasket ring 7, valve seat gasket ring limiting plate 8, thereby guaranteeing that valve seat gasket ring limiting plate 8 will not come out, and the assembly of valve seat gasket ring limiting plate 8 is convenient, the inner side of the circumference of valve body 1 is fixed with sealing ring compression ring 10 by bolt, one side of sealing ring compression ring 10 is equipped with mounting groove 1001, sealing ring compression ring limiting plate 11 is connected in mounting groove 1001, sealing ring compression ring 10 and sealing ring compression ring limiting plate 11 are fixed by bolt, and sealing ring compression ring limiting plate 11 and valve seat gasket ring limiting plate 8 contact.

[0025] Clamping groove 701 is ladder structure, the cross section of valve seat gasket ring limiting plate 8 is T-shaped structure, and sealing ring compression ring limiting plate 11 is arc structure.

[0026] The working principle of the embodiment is as follows: the valve seat gasket ring limiting plate 8 is clamped in the ladder-shaped clamping groove 701, then the cylindrical pin 9 is installed in the valve body 1 through the valve seat compression ring 6, the valve seat gasket ring 7 and the valve seat gasket ring limiting plate 8, so that the valve seat gasket ring limiting plate 8 will not come out, and the assembly of the valve seat gasket ring limiting plate 8 is convenient, and then the sealing ring compression ring limiting plate 11 is installed by bolts.

[0027] In use, the valve stem 3 is twisted to drive the valve plate 2 to rotate, and in the process of rotating the valve plate 2, the sealing ring compression ring limiting plate 11 contacts the valve seat gasket ring limiting plate 8, thereby limiting the rotation of the valve plate 2.

[0028] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A butterfly valve with regulating limit structure, comprising a valve body (1), characterized in that, The valve body (1) is rotatably inserted with a valve rod (3), the outer wall of the valve rod (3) is fixedly connected with a valve plate (2), the circumference of the valve plate (2) is clamped with a sealing ring (4), the circumferential inner wall of the valve body (1) is provided with a valve seat (5), the valve body (1) is provided with a valve seat pressing ring (6), one side of the valve seat pressing ring (6) is provided with a valve seat gasket ring (7), one side of the valve seat gasket ring (7) is provided with a clamping groove (701), the clamping groove (701) is provided with a first clamping hole (702), the clamping groove (701) is clamped with a valve seat gasket ring limiting plate (8), one side of the valve seat gasket ring limiting plate (8) is provided with a second clamping hole (801), the valve seat pressing ring (6), the valve seat gasket ring (7) and the valve seat gasket ring limiting plate (8) are inserted with a cylindrical pin (9), the circumferential inner side of the valve body (1) is fixedly connected with a sealing ring pressing ring (10), one side of the sealing ring pressing ring (10) is provided with a mounting groove (1001), the mounting groove (1001) is clamped with a sealing ring pressing ring limiting plate (11), and the sealing ring pressing ring limiting plate (11) is in contact with the valve seat gasket ring limiting plate (8).

2. The butterfly valve with regulating limit structure according to claim 1, characterized in that, The clamping groove (701) is a stepped structure.

3. The butterfly valve with regulating limit structure according to claim 1, characterized in that, The valve seat gasket ring limiting plate (8) is a T-shaped structure in cross section.

4. The butterfly valve with regulating limit structure according to claim 1, characterized in that, The sealing ring pressing ring limiting plate (11) is an arc-shaped structure.

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