Double-eccentric L-shaped metal sealing butterfly valve

Abstract

The utility model discloses a double-eccentric L-shaped metal sealing butterfly valve which comprises a valve body, a sleeve is perpendicularly fixed to the top face of the valve body, a valve rod is movably connected into the sleeve, a limiting piece is arranged outside the sleeve, the limiting piece penetrates through the sleeve in a radial sliding mode and is connected with the valve rod, and the valve rod penetrates through the top face of the valve body in a rotating mode. The outer portion of the valve rod is axially and movably connected with a mounting seat in a sleeved mode, and the outer side of the mounting seat is fixedly connected with a valve plate. According to the utility model, the valve body, the valve rod and the valve plate are spliced through the threaded pipe and the limiting piece, so that the convenience and the efficiency of disassembling and assembling all parts in the valve body are improved, the valve body does not need to be disassembled by disassembling and assembling a plurality of bolts and nuts, and the damaged valve rod and the damaged valve plate in the valve body can be conveniently and quickly disassembled, assembled and replaced.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, and in particular to a double eccentric L-type metal-sealed butterfly valve. Background Technology

[0002] Double eccentric butterfly valves, also known as high-performance butterfly valves, are mainly used for drainage in systems such as water plants, power plants, steel mills, chemical plants, water source projects, and environmental facilities. They are especially suitable for use in water pipelines as regulating and shut-off devices.

[0003] However, in modern double eccentric butterfly valves, the valve stem and valve plate are fixed to the valve seat by multiple bolts and nuts. When the valve stem or valve plate is damaged and needs to be disassembled and replaced, multiple bolts and nuts need to be removed, which is quite troublesome. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a double eccentric L-type metal sealing butterfly valve.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a double eccentric L-shaped metal-sealed butterfly valve, comprising a valve body, a sleeve vertically fixed to the top surface of the valve body, a valve stem movably connected inside the sleeve, a limiting member provided outside the sleeve, the limiting member radially sliding through the sleeve and connected to the valve stem, the valve stem rotatably passing through the top surface of the valve body and rotatably connected to the inner wall of the valve body, a mounting seat axially movably sleeved outside the valve stem, and a valve plate fixedly connected to the outer side of the mounting seat.

[0006] As a further description of the above technical solution: a groove is formed on the top surface of the sleeve, and an internal thread is provided on the inner wall of the groove. An external threaded tube is connected to the internal thread of the groove. The valve stem is rotatably sleeved on the inner wall of the external threaded tube. An external hexagonal ring is concentrically fixedly connected to the top surface of the external threaded tube. The external hexagonal ring is rotatably sleeved on the outer edge of the valve stem. The limiting member extends into the groove and is movably connected to the external threaded tube.

[0007] As a further description of the above technical solution: the limiting member includes a pull block that abuts against the outside of the sleeve, a countersunk hole is horizontally penetrating one side of the inner wall of the groove, a pull rod is movably connected in the countersunk hole, one end of the pull rod is fixedly connected to the pull block, and the other end is fixedly connected to a positioning block, a spring is sleeved on the outer edge of the pull rod, a positioning groove is horizontally opened on the outside of the external threaded tube, and the positioning block is movably inserted into the positioning groove.

[0008] As a further description of the above technical solution: the top surface of the valve stem is flush with the top surface of the external hexagonal ring, and the external hexagonal block is concentrically fixed to the top surface of the valve stem.

[0009] As a further description of the above technical solution: the top surface of the mounting base has a vertical through hole, the valve stem is axially slidably sleeved in the through hole, and the bottom surface of the valve stem has two mirror-symmetrical sliding grooves axially formed, each of which is slidably connected to a slider, and the slider is fixed in the through hole.

[0010] As a further description of the above technical solution: a rotating groove is radially formed on the inner wall of the valve body, and the end of the valve stem is rotatably connected in the rotating groove.

[0011] This utility model has the following beneficial effects:

[0012] Compared with existing technologies, this double eccentric L-type metal-sealed butterfly valve improves the convenience and efficiency of disassembling and assembling various components in the valve body by splicing the valve body, valve stem, and valve plate with threaded pipes and limiting parts. It eliminates the need to disassemble the valve body by removing and installing multiple bolts and nuts, thus facilitating the quick disassembly and replacement of damaged valve stems and valve plates in the valve body. Attached Figure Description

[0013] Figure 1 This is a three-dimensional view of the overall structure of a double-eccentric L-shaped metal-sealed butterfly valve proposed in this utility model;

[0014] Figure 2 This is a side sectional view of the overall structure of a double eccentric L-shaped metal-sealed butterfly valve proposed in this utility model;

[0015] Figure 3 This utility model proposes a double eccentric L-type metal-sealed butterfly valve. Figure 1 Enlarged view of the structure at point A in the middle;

[0016] Figure 4 This utility model proposes a double eccentric L-type metal-sealed butterfly valve. Figure 2 Enlarged view of the structure at point B;

[0017] Figure 5 This utility model proposes a double eccentric L-type metal-sealed butterfly valve. Figure 2 Enlarged view of the structure at point C.

[0018] Legend:

[0019] 1. Valve body; 2. Sleeve; 3. Valve plate; 4. Mounting seat; 5. Valve stem; 6. External hexagonal ring; 7. External hexagonal block; 8. Pull block; 9. Pull rod; 10. Spring; 11. Countersunk hole; 12. Groove; 13. Positioning groove; 14. Positioning block; 15. External threaded tube; 16. Slider; 17. Slide groove; 18. Through hole. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Reference Figures 1 to 5 This utility model provides a double eccentric L-type metal-sealed butterfly valve, comprising a valve body 1, a sleeve 2 vertically fixed to the top surface of the valve body 1, a valve stem 5 movably connected inside the sleeve 2, a limiting member provided on the outside of the sleeve 2, the limiting member radially sliding through the sleeve 2 and connected to the valve stem 5, the valve stem 5 rotatably passing through the top surface of the valve body 1 and rotatably connected to the inner wall of the valve body 1, a mounting seat 4 axially movably sleeved on the outside of the valve stem 5, a valve plate 3 fixedly connected to the outside of the mounting seat 4, a groove 12 formed on the top surface of the sleeve 2, the inner wall of the groove 12 having an internal thread, an externally threaded pipe 15 connected to the internal thread of the groove 12, the valve stem 5 rotatably sleeved on the inner wall of the externally threaded pipe 15, the externally threaded pipe... The top surface of valve stem 15 is concentrically fixed to the outer hexagonal ring 6. The outer hexagonal ring 6 is rotatably sleeved on the outer edge of valve stem 5. The limiting member extends into the groove 12 and is movably connected to the external threaded tube 15. The top surface of valve stem 5 is flush with the top surface of the outer hexagonal ring 6. The top surface of valve stem 5 is concentrically fixed to the outer hexagonal block 7. The top surface of mounting base 4 vertically penetrates through hole 18. Valve stem 5 is axially slidably sleeved in through hole 18. The bottom surface of valve stem 5 has two mirror-symmetrical sliding grooves 17 axially. Each sliding groove 17 has a slider 16 slidably connected in each sliding groove 17. The slider 16 is fixed in through hole 18. The inner wall of valve body 1 has a radially opened rotating groove. The end of valve stem 5 is rotatably connected in the rotating groove.

[0022] The limiting component includes a pull block 8 that abuts against the outside of the sleeve 2, a countersunk hole 11 that runs horizontally through one side of the inner wall of the groove 12, a pull rod 9 that is movably connected in the countersunk hole 11, one end of the pull rod 9 that is fixedly connected to the pull block 8, and the other end that is fixedly connected to the positioning block 14, a spring 10 that is sleeved on the outer edge of the pull rod 9, and a positioning groove 13 that is horizontally opened on the outside of the external threaded tube 15, and the positioning block 14 that is movably inserted into the positioning groove 13.

[0023] By splicing the valve body 1, valve stem 5, and valve plate 3 with threaded tubes and limiting parts, the convenience and efficiency of disassembling and assembling the various components inside the valve body 1 are improved. There is no need to disassemble the valve body 1 by removing and installing multiple bolts and nuts, which makes it convenient to quickly disassemble and replace the damaged valve stem 5 and valve plate 3 inside the valve body 1.

[0024] Working principle: When disassembling the valve stem 5 and the flapper from the valve body 1, first pull the pull block 8. The pull block 8 pulls the positioning block 14 out of the positioning groove 13 through the pull rod 9 and retracts it into the countersunk hole 11. At the same time, the spring 10 is compressed by the positioning block 14. Then, rotate the outer hexagonal ring 6, causing the outer hexagonal ring 6 to drive the external threaded tube 15 to rotate. As the external threaded tube 15 rotates, it rises. At this time, the positioning groove 13 will not be at the same height as the positioning block 14. Then, release the pull block 8 and continue to rotate the outer hexagonal ring 6 until the external threaded tube 15 extends out of the groove 12. At the same time, as the external threaded tube 15 rises, it drives the valve stem 5 to rise. Then, remove the valve stem 5 together with the outer hexagonal ring 6 from the valve body 1. Then, the valve plate 3 can be directly removed from the valve body 1. When installing, first put the valve plate 3 into the valve body 1, and then... Align the through hole 18 on the mounting base 4 on the rear side of plate 3 with the center of sleeve 2. Then pull the outer pull block 8 to retract the positioning block 14 into the countersunk hole 11. Then align the sliding groove 17 of valve stem 5 with the slider 16 in the through hole 18 for installation. Insert valve stem 5 into the through hole 18 through sleeve 2. Then rotate the external threaded tube 15 through the external hexagonal ring 6 so that the external threaded tube 15 and valve stem 5 descend together. When the bottom surface of the external threaded tube 15 is lower than the lower edge of the positioning block 14, release the pull block 8 and continue to rotate the external hexagonal ring 6 so that the external threaded tube 15 is fully installed in the groove 12. At this time, the positioning groove 13 on the external threaded tube 15 will be aligned with the positioning block 14. At this time, the spring 10, which is in a compressed state, will reset. When the spring 10 resets, it pushes the positioning block 14 from the countersunk hole 11 into the positioning groove 13, thus completing the assembly of valve body 1, valve stem 5 and valve plate 3.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A double eccentric L-type metal-sealed butterfly valve, comprising a valve body (1), characterized in that: The top surface of the valve body (1) is vertically fixed with a sleeve (2). A valve stem (5) is movably connected inside the sleeve (2). A limiting member is provided on the outside of the sleeve (2). The limiting member slides radially through the sleeve (2) and is connected to the valve stem (5). The valve stem (5) rotates through the top surface of the valve body (1) and is rotatably connected to the inner wall of the valve body (1). The outer side of the valve stem (5) is axially movably sleeved with a mounting seat (4). A valve plate (3) is fixedly connected to the outer side of the mounting seat (4). A groove (12) is opened on the top surface of the sleeve (2). The inner wall of the groove (12) is provided with an internal thread. The internal thread of the groove (12) is connected to an external threaded pipe (15). The valve stem (5) is rotatably sleeved on the inner wall of the external threaded pipe (15). (15) is concentrically fixedly connected to an external hexagonal ring (6), which is rotatably sleeved on the outer edge of the valve stem (5). The limiting member extends into the groove (12) and is movably connected to the external threaded tube (15). The limiting member includes a pull block (8) that abuts against the outside of the sleeve (2). A countersunk hole (11) is horizontally penetrating one side of the inner wall of the groove (12). A pull rod (9) is movably connected in the countersunk hole (11). One end of the pull rod (9) is fixedly connected to the pull block (8), and the other end is fixedly connected to a positioning block (14). A spring (10) is sleeved on the outer edge of the pull rod (9). A positioning groove (13) is horizontally opened on the outside of the external threaded tube (15). The positioning block (14) is movably inserted into the positioning groove (13).

2. The double eccentric L-type metal-sealed butterfly valve according to claim 1, characterized in that: The top surface of the valve stem (5) is flush with the top surface of the outer hexagonal ring (6), and the outer hexagonal block (7) is concentrically fixed to the top surface of the valve stem (5).

3. The double eccentric L-type metal-sealed butterfly valve according to claim 1, characterized in that: The top surface of the mounting base (4) is vertically penetrated by a through hole (18). The valve stem (5) is axially slidably sleeved in the through hole (18). The bottom surface of the valve stem (5) has two mirror-symmetrical sliding grooves (17) axially opened. Each of the sliding grooves (17) is slidably connected to a slider (16), and the slider (16) is fixed in the through hole (18).

4. A double eccentric L-type metal-sealed butterfly valve according to claim 1, characterized in that: A rotating groove is radially opened on the inner wall of the valve body (1), and the end of the valve stem (5) is rotatably connected in the rotating groove.

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