A triple eccentric hard-sealed butterfly valve with online quick replacement function of valve seat

Abstract

The present invention belongs to the field of valve technology, and specifically relates to a three-eccentric hard-sealed butterfly valve with a valve seat online quick replacement function. A three-eccentric hard-sealed butterfly valve with a valve seat online quick replacement function, which includes a valve body, a valve stem and a butterfly plate, wherein the valve stem is arranged inside the valve body, and the butterfly plate is arranged around the valve stem. The effects of the present invention are: (1) The online maintenance process is simple. Through the guiding effect of multiple guide grooves, the valve seat can be smoothly removed and installed through the maintenance mechanism, realizing online quick replacement of the valve seat. (2) It has the function of preventing the valve seat from being installed in the wrong direction due to human factors, ensuring the effectiveness and accuracy of the installation process, while improving work efficiency and reducing work intensity.

Description

Technical Field

[0001] The present invention belongs to the technical field of valves, and in particular relates to a triple-eccentric hard-sealed butterfly valve with a valve seat online quick replacement function. Background Art

[0002] As an emerging high-performance valve type, the triple-eccentric butterfly valve is widely used in low-temperature, long-distance pipeline and other working conditions. The existing triple-eccentric hard-sealed butterfly valve is difficult to repair or replace the valve seat online when the valve seat leaks. How to achieve simple, fast and safe online maintenance has become an important issue facing major valve manufacturers. Summary of the Invention

[0003] In view of the above-mentioned problems, the present invention provides a triple-eccentric hard-sealed butterfly valve with a simple structure and capable of realizing safe and rapid online replacement of the valve seat.

[0004] To achieve the above purpose, the technical solution of the invention is: a three-eccentric hard-sealed butterfly valve with the function of online rapid replacement of the valve seat, which includes a valve body, a valve stem and a butterfly plate, wherein the valve stem is arranged inside the valve body and the butterfly plate is arranged around the valve stem.

[0005] As described above, a three-eccentric hard-sealed butterfly valve with a valve seat online quick replacement function is provided, wherein a valve seat is provided in the valve body, a valve stem is provided on the left side of the valve seat, a cylindrical pin is provided on the outer circle of the valve seat, and a sealing ring is provided on the inner side of the valve seat.

[0006] In the triple-eccentric hard-sealed butterfly valve with the valve seat online quick replacement function as described above, the valve seat and the cylindrical pin are spot-welded.

[0007] As described above, a three-eccentric hard-sealed butterfly valve with a valve seat online quick replacement function is provided, wherein a valve seat pressure ring is provided on the right side of the valve seat, the valve seat pressure ring is tightened by a hexagon socket screw, and a four-open ring is provided on the right side of the valve seat pressure ring, and the four-open ring is limited by a four-open ring groove in the valve body.

[0008] In the triple-eccentric hard-sealed butterfly valve with the function of online rapid replacement of the valve seat as described above, a spring washer and a hexagon socket screw are provided between the valve seat pressure ring and the hexagon socket screw, and the spring washer is used to prevent loosening.

[0009] As described above, a three-eccentric hard-sealed butterfly valve with a valve seat online quick replacement function, wherein the valve body includes a maintenance compartment, a maintenance mechanism guide groove, a four-open ring groove, an axial guide groove, a valve seat inner hole, a valve seat pressure ring inner hole, and a four-open ring inner hole, wherein the maintenance mechanism guide groove is arranged on the side wall in the axial direction of the maintenance compartment, the four-open ring groove is arranged on the left side of the maintenance compartment, the axial guide groove is arranged on the left side of the four-open ring groove, and the valve seat inner hole, the valve seat pressure ring inner hole, and the four-open ring inner hole are all arranged on the left side of the maintenance compartment.

[0010] In the triple-eccentric, hard-sealed butterfly valve with online rapid seat replacement, multiple axial guide grooves are provided within the valve body cavity for rapid guidance during installation and removal of the valve seat. One of the multiple axial guide grooves has a positioning and anti-fouling function, ensuring that the valve seat is installed in the correct orientation.

[0011] As described above, a three-eccentric hard-sealed butterfly valve with a valve seat online quick replacement function is provided, wherein a certain number of cylindrical pins are provided on the outer circle of the valve seat, and the number and distribution of the cylindrical pins are consistent with those of the axial guide grooves in the inner cavity of the valve body, and the cylindrical pins are provided with maintenance holes parallel to the rotation center of the valve seat, and the maintenance holes are provided for the maintenance organization to disassemble the valve seat.

[0012] As described above, a three-eccentric hard-sealed butterfly valve with a valve seat online quick replacement function is provided, wherein a maintenance compartment is provided on the valve body, and a maintenance mechanism guide groove is provided in the maintenance compartment. The maintenance mechanism guide groove is used to quickly position and fix the maintenance mechanism, and the valve seat can be quickly disassembled online by operating the maintenance mechanism.

[0013] The effects of the present invention are: (1) the online maintenance process is simple, and the valve seat can be smoothly taken out and installed through the maintenance mechanism through the guiding effect of multiple guide grooves, thereby realizing online rapid replacement of the valve seat.

[0014] (2) It has the function of preventing the valve seat from being installed in the wrong direction due to human factors, ensuring the effectiveness and accuracy of the installation process, while improving work efficiency and reducing work intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Main structure diagram of triple eccentric hard-sealed butterfly valve with online quick seat replacement function

[0016] Figure 2 A partial enlarged view of area A of a triple-eccentric hard-sealed butterfly valve with online quick seat replacement function

[0017] Figure 3 Valve body structure diagram

[0018] Figure 4 Valve body AA section view

[0019] Figure 5 Valve seat main structure diagram

[0020] Figure 6 Cylindrical pin main structure diagram

[0021] Figure 7 Valve seat pressure ring main structure diagram

[0022] Figure 8 Four-open-loop main structure diagram

[0023] In the figure: 1. Valve body; 1-a. Maintenance compartment; 1-b. Maintenance mechanism guide groove; 1-c. Four-open ring groove; 1-d. Axial guide groove; 1-e. Valve seat inner hole; 1-f. Valve seat pressure ring inner hole; 1-g. Four-open ring inner hole; 2. Valve stem; 3. Butterfly plate; 4. Sealing ring; 5. Valve seat; 5-a. Cylindrical hole; 5-b. Outer circle; 6. Cylindrical pin; 6-a. Maintenance hole; 7. Hexagon socket screw; 8. Valve seat pressure ring; 8-a. Positioning shoulder; 8-b. Outer circle; 8-c. Threaded hole; 9. Four-open ring; 9-a. Process groove; 9-b. Outer circle; 9-c. Inner hole; 10. Limit sleeve; 11. Spring washer DETAILED DESCRIPTION

[0024] The following is a further description of this patent with reference to the accompanying drawings:

[0025] like Figures 1 to 8 As shown, the valve body 1 is provided with a certain number of axial guide grooves 1-d with a certain width at the inner hole 1-e of the inner cavity valve seat. Since the valve seat installation has directional requirements, the width of one of the axial guide grooves 1-d is controlled to be different from the other axial guide grooves 1-d, which plays an anti-mistake function. In order to facilitate the online maintenance of the valve seat, a maintenance compartment 1-a is provided on one side of the valve body 1, and a maintenance mechanism guide groove 1-b is reserved at the mouth of the maintenance compartment 1-a. In order to ensure that the direction of the valve seat 5 meets the technical requirements during installation, cylindrical holes 5-a are provided on the outer circle 5-a of the valve seat 5, which are consistent with the number, size and distribution of the axial guide grooves 1-d in the inner cavity of the valve body 1. A tight fit is adopted for the diameter of the positioning cylindrical hole 5-a and the width of the corresponding guide groove 1-d on the valve body 1, and a loose fit is adopted for the others. As shown Figures 1 to 8 As shown, the valve seat is installed online as follows:

[0026] After installing the valve stem 2, butterfly plate 3, sealing ring 4, and other internal components into the inner cavity of the valve body 1, place the butterfly plate in the fully open position. Install the cylindrical pins 6 into the corresponding cylindrical holes 5-a on the valve seat 5, ensuring that the center of the maintenance hole 6-a on the cylindrical pin 6 is parallel to the center of the valve seat 5, and then secure them by spot welding. Install the valve seat into the valve cavity through the maintenance port 1-a on the valve body 1. Ensure that the valve body 1 and valve seat 5 are coaxial by aligning the inner hole 1-e of the valve seat on the valve body 1 with the outer diameter 5-b of the valve seat 5. Ensure that the valve seat 5 is positioned in the direction of the inner cavity of the valve body 1 to the specified position by aligning the axial guide groove 1-d and the cylindrical pin 6. After screwing the hexagon socket screw 7, limiting sleeve 10 and spring washer 11 into the valve seat pressure ring 8 (just screw them in), install it into the valve cavity, and match its outer circle 8-b with the inner hole 1-f of the valve seat pressure ring of the valve body 1 to the specified position. After installing the four-open ring 9 into the inner hole 1-g of the four-open ring through the maintenance compartment 1-a port on the valve body 1, install the online pre-tightening tool into the guide groove 1-b of the maintenance mechanism at the maintenance compartment 1-a port, tighten the hexagon socket screws 7 respectively to fix the valve seat 5.

[0027] Perform the following online disassembly process on the valve seat:

[0028] Place the butterfly plate in the fully open position. Install the maintenance mechanism into the maintenance mechanism guide groove 1-b at the maintenance compartment 1-a port, and loosen the hexagon socket screws 7. After removing the valve seat pressure ring 8 and the four-open ring 9, place the butterfly plate in the fully closed position, use the closing force to push the valve seat 5 away from its original position, install the maintenance mechanism into the maintenance mechanism guide groove 1-b at the maintenance compartment 1-a port, connect the pull rod on the online disassembly tool to the maintenance hole 6-a on the cylindrical pin 6 and fix it, and drive the online disassembly tool to smoothly remove the valve seat 5 to achieve the online disassembly process, so that the valve seat has the function of online quick replacement.

[0029] The present invention has many other embodiments. Without departing from the principles of the present invention, those skilled in the art can make various corresponding changes based on the present invention, but these corresponding changes should all fall within the scope of the claims to which the present invention belongs.

Claims

1. A triple-eccentric hard-sealed butterfly valve with online rapid seat replacement function, characterized by: The valve comprises a valve body (1), a valve stem (2) and a butterfly plate (3), wherein the valve stem (2) is arranged inside the valve body (1), and the butterfly plate (3) is arranged around the valve stem (2); A valve seat (5) is provided in the valve body (1), a valve stem (2) is provided on the left side of the valve seat (5), a cylindrical pin (6) is provided on the outer circle (5-b) of the valve seat (5), and a sealing ring (4) is provided on the inner side of the valve seat (5); The valve seat (5) and the cylindrical pin (6) are spot-welded; A valve seat pressure ring (8) is provided on the right side of the valve seat (5), and the valve seat pressure ring (8) is pressed by a hexagon socket screw (7). A four-open ring (9) is provided on the right side of the valve seat pressure ring (8), and the four-open ring (9) is limited by a four-open ring groove (1-c) in the valve body (1); The valve body (1) comprises a maintenance chamber (1-a), a maintenance mechanism guide groove (1-b), four open ring grooves (1-c), an axial guide groove (1-d), a valve seat inner hole (1-e), a valve seat pressure ring inner hole (1-f), and four open ring inner holes (1-g), wherein the maintenance mechanism guide groove (1-b) is arranged on the side wall of the maintenance chamber (1-a) in the axial direction, the four open ring grooves (1-c) are arranged on the left side of the maintenance chamber (1-a), the axial guide groove (1-d) is arranged on the left side of the four open ring grooves (1-c), and the valve seat inner hole (1-e), the valve seat pressure ring inner hole (1-f), and the four open ring inner holes (1-g) are all arranged on the left side of the maintenance chamber (1-a); A plurality of axial guide grooves (1-d) are provided in the inner cavity of the valve body (1) for quick guidance of the installation and removal of the valve seat (5); one of the plurality of axial guide grooves has a positioning and foolproofing function to ensure that the valve seat (5) is installed in the correct direction; A certain number of cylindrical pins (6) are provided on the outer circle (5-b) of the valve seat (5), and the number and distribution thereof are consistent with those of the axial guide grooves (1-d) in the inner cavity of the valve body (1). The cylindrical pins (6) are provided with maintenance holes (6-a) parallel to the rotation center of the valve seat, and the maintenance holes are provided for a maintenance mechanism to disassemble the valve seat (5); A maintenance chamber (1-a) is provided on the valve body (1), and a maintenance mechanism guide groove (1-b) is provided in the maintenance chamber. The maintenance mechanism guide groove (1-b) is used for quickly positioning and fixing the maintenance mechanism. By operating the maintenance mechanism, the valve seat (5) can be quickly disassembled online.

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