Valve seat dismounting device

Abstract

The utility model relates to the technical field of valve maintenance, in particular to a valve seat dismantling device, a dismantling assembly comprises an outer pull rod and an inner pull rod, the upper portion of the inner pull rod is connected in a bottom hole in a sliding mode, the lower end of the pull rod is fixedly connected with a valve seat connecting plate, and the valve seat connecting plate is connected to a valve seat. The valve seat can be dismounted by lifting the dismounting pull rod, upward impact of the valve seat and the inner pull rod can be buffered through the buffer spring, falling of the inner pull rod is buffered through the buffer gasket, the valve seat is prevented from being damaged in the dismounting process, the dismounting pull rod is also prevented from being damaged, and meanwhile operation safety is guaranteed. Due to the arrangement of the first telescopic sliding rod and the second telescopic sliding rod, the telescopic length of the valve seat fixing blocking piece and the telescopic length of the valve seat fixing plate can be adjusted, the valve seat connecting plate can be suitable for valve seats with different inner diameters, and the application range of the valve seat connecting plate is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of valve maintenance, in particular to a valve seat removal device. Background Art

[0002] When performing valve maintenance, it is often necessary to remove the valve seat. Under high temperature and high pressure conditions, the removal of the valve body requires a special removal device to ensure the safety of the operator and improve the removal efficiency of the valve body. Existing high temperature and high pressure valve body removal devices usually use pneumatic or hydraulic removal tools. During the removal process, the overall use and transportation of the removal device are relatively complicated, which seriously increases the removal time of the valve body. At the same time, the commonly used valve body removal devices are usually non-standard structures. A single removal device can only be used for the removal operation of one valve body, and it is impossible to achieve multiple uses of the removal device, which leads to high production costs for the factory.

[0003] The patent with the authorization announcement number CN216883778U provides a valve seat disassembly tool, in which the valve seat sleeve is movably connected to the disassembly rod through the groove and the protrusion, so that the valve seat can be disassembled through the disassembly rod. Although the device described in this patent has a simple structure, it still cannot realize the use of a single disassembly device on multiple valve bodies. Its structural design only meets the needs of a single valve body structure, and cannot further reduce the production and use costs of the factory. Utility Model Content

[0004] The utility model aims to provide a valve seat removal device, which can be suitable for valve seats with different inner diameters and can buffer the valve seat during the removal process to avoid damage to the valve seat during the removal process.

[0005] In order to achieve the above-mentioned technical effect, the utility model provides a valve seat removal device including a disassembly and assembly component, the disassembly and assembly component including an outer pull rod and an inner pull rod, the outer pull rod has a bottom hole on its bottom surface, and the bottom hole is a blind hole; the inner pull rod has a baffle II on its upper part, the inner pull rod has an upper part slidingly connected in the bottom hole, the pull rod extends out of the bottom hole, baffle II is slidingly connected in the bottom hole, a baffle I is provided on the inner wall at the bottom end of the bottom hole, baffle II is arranged above baffle I, the outer diameter of baffle II is smaller than the inner diameter of the bottom hole, the outer diameter of baffle II is larger than the inner hole of baffle I, the inner diameter of baffle I is larger than the outer diameter of the pull rod, the length of the pull rod above baffle II is smaller than the depth of the bottom hole, the lower end of the pull rod is fixedly connected to a valve seat connecting plate, and the valve seat connecting plate is connected to the valve seat.

[0006] Furthermore, a buffer spring is sleeved on the upper part of the pull rod, the upper end of the buffer spring is connected to the top surface in the bottom hole, and the lower end of the buffer spring is connected to the top surface of the baffle II; a buffer washer is fixedly connected to the top surface of the baffle I.

[0007] Further, it further includes a manual lifting assembly. The manual lifting assembly includes a lifting baffle and a lifting retaining disc. A central hole I is provided in the center of the lifting baffle, and the central hole I is welded to the outer wall of the outer pull rod. A central hole II is provided in the center of the lifting retaining disc. The inner diameter of the central hole II is larger than the outer diameter of the outer pull rod, and the inner diameter of the central hole II is smaller than the outer diameter of the lifting baffle. The central hole II is sleeved on the outer pull rod. The lifting retaining disc is connected to the lower end of the lifting baffle, and a handle is fixedly connected to the outer wall of the lifting retaining disc.

[0008] Further, a chute group is provided on the lifting baffle. The chute group includes a fan-shaped through hole and a fan-shaped chute. The width of the fan-shaped through hole is larger than the width of the fan-shaped chute, and the fan-shaped through hole and the fan-shaped chute are communicated. A connecting block group is provided on the top surface of the lifting retaining disc. The connecting block group includes a fan-shaped support block and a fan-shaped vertical plate. The fan-shaped vertical plate is fixedly connected to the top surface of the lifting retaining disc, and the fan-shaped support block is fixedly connected to the top surface of the fan-shaped vertical plate. The width of the fan-shaped support block is larger than the width of the fan-shaped vertical plate. The fan-shaped support block passes through the fan-shaped through hole, and the fan-shaped vertical plate is slidably connected in the fan-shaped chute. The fan-shaped support block is connected to the top surface of the lifting baffle.

[0009] Further, a screw hole is provided in the fan-shaped support block, and a bolt is connected in the screw hole. Screw holes are provided on all the outer pull rods. After the bolt passes through the screw hole of the fan-shaped support block, it is connected to the screw hole of the outer pull rod.

[0010] Further, a plurality of the chute groups are provided on the lifting baffle, and the plurality of chute groups are circumferentially and evenly distributed around the axis of the lifting baffle; a plurality of the connecting block groups are provided on the lifting retaining disc, and the plurality of connecting block groups are circumferentially and evenly distributed around the axis of the lifting retaining disc; the number of the plurality of chute groups is the same as the number of the plurality of connecting block groups, and the plurality of chute groups and the plurality of connecting block groups correspond to each other one by one.

[0011] Further, the valve seat connecting plate includes a valve seat fixing plate and a valve seat fixing retaining piece. The valve seat fixing retaining piece is connected to the top surface of the valve seat fixing plate. A threaded portion is provided at the lower end of the inner pull rod, and two nuts are connected to the threaded portion. The valve seat fixing plate and the valve seat fixing retaining piece are clamped between the two nuts. Through holes for the nuts to pass through are provided in the centers of both the valve seat fixing plate and the valve seat fixing retaining piece. A second pin positioning groove is provided on the valve seat fixing plate, and a first pin positioning groove is provided on the valve seat fixing retaining piece. Both the second pin positioning groove and the first pin positioning groove are connected to the valve seat.

[0012] Further, first telescopic sliding rods are provided on both symmetric side walls of the valve seat fixing retaining piece, and an outer plate portion is slidably connected to the end of each first telescopic sliding rod away from the valve seat fixing retaining piece; the first pin positioning groove is provided on the outer plate portion of the valve seat fixing retaining piece.

[0013] Further, second telescopic sliding rods are provided on both symmetric side walls of the valve seat fixing plate, and an outer plate portion is slidably connected to the end of each second telescopic sliding rod away from the valve seat fixing plate; the second pin positioning groove is provided on the outer plate portion of the valve seat fixing plate.

[0014] Furthermore, a lifting ring is fixedly connected to the top end of the outer pull rod.

[0015] The beneficial effects of the present utility model are as follows:

[0016] By pulling and disassembling the pull rod, the valve seat can be removed. The buffer spring can buffer the upward impact of the valve seat and the inner pull rod, and the buffer washer can buffer the fall of the inner pull rod, avoiding damage during the disassembly and assembly of the valve seat and the pull rod, and also ensuring operation safety. The first telescopic slide rod and the second telescopic slide rod enable the valve seat fixed baffle and the valve seat fixing plate to adjust the telescopic length, so that the valve seat connecting plate can be applicable to valve seats with different inner diameters, improving the applicable range of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is of the present utility model Figure 1 A - A cross-sectional view;

[0019] Figure 3 is of the present utility model Figure 1 B - B cross-sectional view;

[0020] Figure 4 is of the present utility model Figure 2 C - C cross-sectional view in;

[0021] Figure 5 is of the present utility model Figure 3 D - D cross-sectional view in;

[0022] Figure 6 is a schematic structural diagram of the lifting baffle of the present utility model;

[0023] Figure 7 is a schematic structural diagram of the lifting plate of the present utility model;

[0024] Figure 8 is a partial structural schematic diagram of the connection between the outer pull rod and the inner pull rod of the present utility model.

[0025] In the figure: 1. Disassembly and assembly pull rod; 11. Outer pull rod; 111. Bottom hole; 12. Inner pull rod; 121. Threaded part; 13. Stop platform I; 14. Stop platform II; 15. Buffer washer; 2. Valve seat connecting plate; 21. Valve seat fixing plate; 211. Second telescopic slide rod; 212. Second pin positioning groove; 22. Valve seat fixing retaining piece; 221. First telescopic slide rod; 222. First pin positioning groove; 3. Buffer spring; 4. Manual lifting assembly; 41. Lifting baffle; 411. Central hole I; 42. Lifting retaining disc; 421. Central hole II; 43. Sector through hole; 44. Sector chute; 45. Sector support block; 46. Sector vertical plate; 5. Hoisting ring. Detailed implementation mode

[0026] As Figures 1-8 As shown, a valve seat removal device of the present utility model includes a disassembly and assembly component 1. The disassembly and assembly component 1 includes an outer pull rod 11 and an inner pull rod 12. A bottom hole 111 is provided on the bottom surface of the outer pull rod 11, and the bottom hole 111 is a blind hole. A stop platform II 14 is provided on the upper part of the inner pull rod 12. The upper part of the inner pull rod 12 is slidably connected in the bottom hole 111. The lower part of the pull rod 12 extends out of the bottom hole 111. The stop platform II 14 is slidably connected in the bottom hole 111. A stop platform I 13 is provided on the inner wall of the bottom end of the bottom hole 111. The stop platform II 14 is arranged above the stop platform I 13. The outer diameter of the stop platform II 14 is smaller than the inner diameter of the bottom hole 111. The outer diameter of the stop platform II 14 is larger than the inner hole of the stop platform I 13. The inner diameter of the stop platform I 13 is larger than the outer diameter of the pull rod 12. The length of the pull rod 12 above the stop platform II 14 is smaller than the depth of the bottom hole 111. The lower end of the pull rod 12 is fixedly connected with a valve seat connecting plate 2, and the valve seat connecting plate 2 is connected to the valve seat. A buffer spring 3 is sleeved on the upper part of the pull rod 12. The upper end of the buffer spring 3 abuts against the inner top surface of the bottom hole 111, and the lower end of the buffer spring 3 abuts against the top surface of the stop platform II 14. A buffer washer 15 is fixedly connected to the top surface of the stop platform I 13. The top end of the outer pull rod 11 is fixedly connected with a hoisting ring 5.

[0027] When the present utility model is in use, the valve seat connecting plate 2 is connected to the valve seat. Hold the outer pull rod 11 or use tools such as a crane or an electric hoist to lift the disassembly and assembly component 1 upward through the hoisting ring 5, so as to remove the disassembly and assembly component 1.

[0028] When the outer pull rod 11 is lifted, the outer pull rod 11 drives the inner pull rod 12 to be lifted by blocking the stop platform II 14 through the stop platform I 13. When disengaging from the valve seat, due to the pulling force and inertia, after the outer pull rod 11 stops being lifted, the inner pull rod 12 will form an upward impact, thereby compressing the buffer spring 3. The compression of the buffer spring 3 plays a buffering role. After the inner pull rod 12 falls, it contacts the buffer washer 15, and the buffer washer 15 also plays a buffering role. The buffer spring 3 and the buffer washer 15 play a buffering role to protect the valve seat from being damaged during removal.

[0029] The utility model further includes a manual lifting component 4. The manual lifting component 4 includes a lifting baffle 41 and a lifting retaining disc 42. A central hole I 411 is provided in the center of the lifting baffle 41, and the central hole I 411 is welded to the outer wall of the outer pull rod 11. A central hole II 421 is provided in the center of the lifting retaining disc 42. The inner diameter of the central hole II 421 is larger than the outer diameter of the outer pull rod 11, and the inner diameter of the central hole II 421 is smaller than the outer diameter of the lifting baffle 41. The central hole II 421 is sleeved on the outer pull rod 11. The lifting retaining disc 42 is connected to the lower end of the lifting baffle 41, and a handle is fixedly connected to the outer wall of the lifting retaining disc 42. A chute group is provided on the lifting baffle 41. The chute group includes a sector through hole 43 and a sector chute 44. The width of the sector through hole 43 is larger than the width of the sector chute 44, and the sector through hole 43 is communicated with the sector chute 44. A connecting block group is provided on the top surface of the lifting retaining disc 42. The connecting block group includes a sector support block 45 and a sector vertical plate 46. The sector vertical plate 46 is fixedly connected to the top surface of the lifting retaining disc 42, and the sector support block 45 is fixedly connected to the top surface of the sector vertical plate 46. The width of the sector support block 45 is larger than the width of the sector vertical plate 46. The sector support block 45 passes through the sector through hole 43, and the sector vertical plate 46 is slidably connected in the sector chute 44. The sector support block 45 is connected to the top surface of the lifting baffle 41. A screw hole is provided in the sector support block 45, and a bolt is connected in the screw hole. Screw holes are provided on all the outer pull rods 11. After the bolt passes through the screw hole of the sector support block 45, it is connected to the screw hole of the outer pull rod 11. A plurality of chute groups are provided on the lifting baffle 41, and the plurality of chute groups are circumferentially and evenly distributed with the axis of the lifting baffle 41 as the center. The plurality of connecting block groups are provided on the lifting retaining disc 42, and the plurality of connecting block groups are circumferentially and evenly distributed with the axis of the lifting retaining disc 42 as the center. The number of the plurality of chute groups is the same as the number of the plurality of connecting block groups, and the plurality of chute groups and the plurality of connecting block groups correspond to each other one by one.

[0030] When connecting the lifting retaining disc 42, first align the sector support block 45 with the sector through hole 43. After the sector support block 45 passes through the sector through hole 43, rotate the lifting retaining disc 42. When the lifting retaining disc 42 rotates, the sector vertical plate 46 slides in the sector chute 44. As the lifting retaining disc 42 rotates, the sector support block 45 leaves above the sector through hole 43 and sits on the top surface of the lifting baffle 41 to play a supporting role. Then connect the sector support block 45 and the outer pull rod 11 through bolts to stably connect the lifting retaining disc 4. After that, lift the manual lifting component 4 and the dismounting and assembling pull rod 1 through the handle on the lifting retaining disc 42.

[0031] The valve seat connecting plate 2 includes a valve seat fixing plate 21 and a valve seat fixing shim 22. The valve seat fixing shim 22 is connected to the top surface of the valve seat fixing plate 21. The lower end of the inner pull rod 12 is provided with a threaded portion 121, and two nuts are connected to the threaded portion 121. The valve seat fixing plate 21 and the valve seat fixing shim 22 are clamped between the two nuts. Through holes for the nuts to pass through are provided in the centers of both the valve seat fixing plate 21 and the valve seat fixing shim 22. A second pin positioning groove 212 is provided on the valve seat fixing plate 21, and a first pin positioning groove 222 is provided on the valve seat fixing shim 22. Both the second pin positioning groove 212 and the first pin positioning groove 222 are connected to the valve seat. First telescopic slide rods 221 are provided on both symmetric side walls of the valve seat fixing shim 22, and an outer plate portion is slidably connected to one end of each first telescopic slide rod 221 away from the valve seat fixing shim 22. The first pin positioning groove 222 is provided on the outer plate portion of the valve seat fixing shim 22. Second telescopic slide rods 211 are provided on both symmetric side walls of the valve seat fixing plate 21, and an outer plate portion is slidably connected to one end of each second telescopic slide rod 211 away from the valve seat fixing plate 21. The second pin positioning groove 212 is provided on the outer plate portion of the valve seat fixing plate 21.

[0032] The provision of the first telescopic slide rods 221 and the second telescopic slide rods 211 enables the valve seat fixing shim 22 and the valve seat fixing plate 21 to adjust the telescopic length, so that the valve seat connecting plate 2 can be applicable to valve seats with different inner diameters.

Claims

1. A valve seat removal device, characterized in that: The invention comprises a disassembly assembly (1), wherein the disassembly assembly (1) comprises an outer pull rod (11) and an inner pull rod (12), wherein the outer pull rod (11) has a bottom hole (111) on its bottom surface, and the bottom hole (111) is a blind hole; the inner pull rod (12) has a stopper II (14) on its upper part, the inner pull rod (12) is slidably connected in the bottom hole (111), the lower part of the pull rod (12) extends out of the bottom hole (111), the stopper II (14) is slidably connected in the bottom hole (111), and the inner wall at the bottom end of the bottom hole (111) is A baffle I (13) is provided on the baffle, and a baffle II (14) is provided above the baffle I (13). The outer diameter of the baffle II (14) is smaller than the inner diameter of the bottom hole (111), the outer diameter of the baffle II (14) is larger than the inner hole of the baffle I (13), the inner diameter of the baffle I (13) is larger than the outer diameter of the tie rod (12), the length of the tie rod (12) above the baffle II (14) is smaller than the depth of the bottom hole (111), and the lower end of the tie rod (12) is fixedly connected to a valve seat connecting plate (2), and the valve seat connecting plate (2) is connected to the valve seat.

2. A valve seat removal device according to claim 1, characterized in that: A buffer spring (3) is sleeved on the upper part of the pull rod (12), the upper end of the buffer spring (3) is connected to the top surface of the bottom hole (111), and the lower end of the buffer spring (3) is connected to the top surface of the stopper II (14); a buffer washer (15) is fixedly connected to the top surface of the stopper I (13).

3. A valve seat removal device according to claim 2, characterized in that: The manual lifting assembly (4) includes a lifting baffle (41) and a lifting baffle plate (42). A center hole I (411) is provided at the center of the lifting baffle plate (41). The center hole I (411) is welded to the outer wall of the outer pull rod (11). A center hole II (421) is provided at the center of the lifting baffle plate (42). The inner diameter of the center hole II (421) is larger than the outer diameter of the outer pull rod (11). The inner diameter of the center hole II (421) is smaller than the outer diameter of the lifting baffle plate (41). The center hole II (421) is sleeved on the outer pull rod (11). The lifting baffle plate (42) is connected to the lower end of the lifting baffle plate (41). A handle is fixedly connected to the outer wall of the lifting baffle plate (42).

4. A valve seat removal device according to claim 3, characterized in that: The lifting baffle (41) is provided with a slide groove group, which includes a fan-shaped through hole (43) and a fan-shaped slide groove (44). The width of the fan-shaped through hole (43) is greater than the width of the fan-shaped slide groove (44). The fan-shaped through hole (43) and the fan-shaped slide groove (44) are connected. The top surface of the lifting baffle (42) is provided with a connecting block group, which includes a fan-shaped support block (45) and a fan-shaped vertical plate (46). The fan-shaped vertical plate (46) is fixedly connected to the top surface of the lifting baffle (42). The fan-shaped support block (45) is fixedly connected to the top surface of the fan-shaped vertical plate (46). The width of the fan-shaped support block (45) is greater than the width of the fan-shaped vertical plate (46). The fan-shaped support block (45) passes through the fan-shaped through hole (43). The fan-shaped vertical plate (46) is slidably connected in the fan-shaped slide groove (44). The fan-shaped support block (45) is connected to the top surface of the lifting baffle (41).

5. A valve seat removal device according to claim 4, characterized in that: The fan-shaped support block (45) is provided with a screw hole, in which a bolt is connected, and all the outer pull rods (11) are provided with a screw hole, and the bolt passes through the screw hole of the fan-shaped support block (45) and is connected to the screw hole of the outer pull rod (11).

6. A valve seat removal device according to claim 5, characterized in that: The lifting baffle (41) is provided with a plurality of slide groove groups, and the plurality of slide groove groups are evenly distributed around the circumference with the axis of the lifting baffle (41) as the center; the lifting baffle plate (42) is provided with a plurality of connecting block groups, and the plurality of connecting block groups are evenly distributed around the circumference with the axis of the lifting baffle plate (42) as the center; the plurality of slide groove groups is the same in number as the plurality of connecting block groups, and the plurality of slide groove groups correspond to the plurality of connecting block groups one by one.

7. A valve seat removal device according to any one of claims 1 to 6, characterized in that: The valve seat connecting plate (2) comprises a valve seat fixing plate (21) and a valve seat fixing baffle (22), the valve seat fixing baffle (22) being connected to the top surface of the valve seat fixing plate (21), the lower end of the inner pull rod (12) being provided with a threaded portion (121), the threaded portion (121) being connected to two nuts, the valve seat fixing plate (21) and the valve seat fixing baffle (22) being clamped between the two nuts, the valve seat fixing plate (21) and the valve seat fixing baffle (22) being provided with through holes at the center thereof for the nuts to pass through, the valve seat fixing plate (21) being provided with a second pin positioning groove (212), the valve seat fixing baffle (22) being provided with a first pin positioning groove (222), and the second pin positioning groove (212) and the first pin positioning groove (222) being connected to the valve seat.

8. A valve seat removal device according to claim 7, characterized in that: A first telescopic slide rod (221) is provided on both symmetrical side walls of the valve seat fixing baffle (22), and one end of the first telescopic slide rod (221) away from the valve seat fixing baffle (22) is slidably connected to an outer plate portion; a first pin positioning groove (222) is provided on the outer plate portion of the valve seat fixing baffle (22).

9. A valve seat removal device according to claim 8, characterized in that: A second telescopic slide rod (211) is provided on both symmetrical side walls of the valve seat fixing plate (21), and one end of the second telescopic slide rod (211) away from the valve seat fixing plate (21) is slidably connected to the outer plate portion; a second pin positioning groove (212) is provided on the outer plate portion of the valve seat fixing plate (21).

10. A valve seat removal device according to any one of claims 1, 2, 3, 4, 5, 6, 8 and 9, characterized in that: The top end of the outer pull rod (11) is fixedly connected with a lifting ring (5).

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