CN110977872A - Valve seat dismounting device and method - Google Patents
Valve seat dismounting device and method Download PDFInfo
- Publication number
- CN110977872A CN110977872A CN201911322439.5A CN201911322439A CN110977872A CN 110977872 A CN110977872 A CN 110977872A CN 201911322439 A CN201911322439 A CN 201911322439A CN 110977872 A CN110977872 A CN 110977872A
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- valve seat
- hook
- tray
- disc
- rod
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
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- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention relates to the technical field of valve seat dismounting, aims to solve the problems that the dismounting of the existing valve seat dismounting structure wastes time and labor and/or easily damages a valve seat mounting surface, and provides a valve seat dismounting device and a method. The valve seat dismounting device comprises a disc piece and a lifting rod; a plurality of hooks distributed along the circumferential direction are connected on the circumferential direction of the disc piece; the hook claw comprises a rod part and a hook-shaped part which is formed by bending the lower end of the rod part towards the outer side, and the upper end of the rod part is hinged to the disc part so that the hook claw can swing inwards and outwards relative to the central axis of the disc part; a through hole is formed in the middle of the disc piece; the lifting rod comprises a screw and a tray; the lower end of the screw rod is fixedly connected to the middle position of the tray; the screw rod of the lifting rod penetrates through the through hole and forms a spiral fit with the through hole, so that the tray can vertically move relative to the disc piece and the hooks to different heights for laterally supporting the rod parts of the hooks. The valve seat has the advantages that the valve seat is convenient and labor-saving to disassemble, and the valve seat installing surface is not easy to damage.
Description
Technical Field
The invention relates to the technical field of valve seat dismounting, in particular to a valve seat dismounting device and a valve seat dismounting method.
Background
At present, the high pressure main steam valve that various generating set used, valves such as high pressure governing valve are in order to make, overhaul and the convenience of later stage change, usually with main steam valve, disk seats such as governing valve, the design is the assembled structure, the disk seat is through assembling the fastening bolt on the valve casing promptly, and simultaneously, do not take place to reveal in order to obtain the excellent leakproofness, the disk seat adopts face of cylinder interference fit structure with the cooperation of valve casing, this kind of structure can satisfy daily operation needs, but when the trouble appears and need demolish the disk seat and maintain or change the processing, because itself adopts the interference structure, oxidation etc. under the long-time high temperature operation make the disk seat be difficult to demolishd, cause very easily in concrete construction and strain constitution secondary damage.
Disclosure of Invention
The invention aims to provide a valve seat dismounting device and a valve seat dismounting method, which aim to solve the problems that the dismounting of the existing valve seat dismounting structure wastes time and labor and/or easily damages a valve seat mounting surface.
The embodiment of the invention is realized by the following steps:
a valve seat removing device for removing a valve seat from a valve housing includes a disk member and a lifting rod;
a plurality of hooks distributed along the circumferential direction are connected on the circumferential direction of the disc piece; the hook claw comprises a rod part and a hook-shaped part which is formed by bending the lower end of the rod part towards the outer side, and the upper end of the rod part is hinged to the disc part so that the hook claw can swing inwards and outwards relative to the central axis of the disc part; a through hole is formed in the middle of the disc piece;
the lifting rod comprises a screw and a tray; the lower end of the screw rod is fixedly connected to the middle position of the tray; the screw rod of the lifting rod penetrates through the through hole and forms a spiral fit with the through hole, so that the tray can vertically move relative to the disc piece and the hooks to different heights for laterally supporting the rod parts of the hooks.
The application method of the valve seat dismounting device in the scheme comprises the following steps: the lower adjusting tray is rotated to retract the hook claw, so that the valve seat dismounting device penetrates through the valve seat; rotating the disc part to drive the hook claw to descend relative to the lifting rod, so that the hook claw is laterally expanded to the lower end face of the vertically corresponding valve seat; vertically lifting the lifting rod to enable the hook claw to hook the valve seat and enable the tray to seal the lower opening of the valve seat, so that the valve seat and the tray form a cooling chamber with an upward opening; placing dry ice in the cooling chamber, and reducing the temperature of the valve seat to enable the valve seat to shrink due to cooling; and continuously vertically lifting the lifting rod to lift the whole valve seat dismounting device, so that the valve seat dismounting device upwards demounts the valve seat.
In the scheme, the arranged tray is used as a lateral supporting structure of the hook claw, and the relative height of the tray and the hook claw is adjusted by combining the spiral matching relationship of the screw rod and the disc piece so as to adjust the supported position and the opening size of the hook claw to be matched with the valve seat to be disassembled; on the other hand, the tray can seal the lower opening of the valve seat to enclose a cooling chamber for placing a cooling object, so that the valve seat is cooled and contracted, and the resistance of the valve body to the disassembly of the valve seat is reduced.
Therefore, the valve seat dismounting device in the scheme has the beneficial effects that the valve seat is convenient and labor-saving to dismount, and the valve seat mounting surface is not easy to damage.
In one embodiment:
the disc piece comprises a rotating disc and a hanging scaffold, and the hanging scaffold is connected between the rotating discs; the hook claw is connected with the rotating disc;
the screw rod of the lifting rod penetrates through the rotating disc and the hanging scaffold, the screw rod and the rotating disc are in spiral fit, and the through hole of the hanging scaffold is spaced from the screw rod.
In one embodiment:
the lower part of the rotating disk is radially and inwardly reduced into a connecting ring part, and a clamping ring is clamped on the periphery of the connecting ring part; the hanging scaffold is rotatably limited between the snap ring and the step surface at the upper end of the connecting ring part.
In one embodiment:
a plurality of hinge seats distributed along the circumferential direction are distributed on the lower surface of the hanging scaffold;
the upper portion of hook sets up to open-ended U type portion up, and articulated seat is gone into to U type portion card to through round pin axle pin joint in articulated seat.
In one embodiment:
the upper end of the screw rod is detachably connected with a hanging ring.
In one embodiment:
the tray is a concave disc-shaped structure.
In one embodiment:
the upper surface of the tray is a concave spherical cambered surface;
the hook-shaped part is of a U-shaped hook-shaped structure, and the lower surface of the hook-shaped part is a downward convex arc-shaped surface;
the claw has a retracted state; when the fingers are in the stowed position, each finger is restrained within the tray by the contact engagement between the arcuate lower surface of its hook and the upper surface of the tray.
In one embodiment:
the hook-shaped part is of a U-shaped hook-shaped structure, the outer end of the hook-shaped part bends outwards and extends to form a tail hook, and the upper surface of the tail hook is an arc-shaped surface protruding upwards.
This scheme still provides a valve seat dismantlement method, and it is based on aforementioned valve seat dismounting device, and this method includes:
retracting the hook claw, and enabling the valve seat dismounting device to downwards penetrate through the valve seat; rotating the disc piece to drive the hook claw to descend relative to the disc piece, so that the hook claw is laterally expanded to the lower end face of the vertically corresponding valve seat;
vertically lifting the lifting rod to enable the hook claw to hook the valve seat and enable the tray to correspond to the lower opening of the valve seat, and enabling the valve seat and the tray to enclose a cooling chamber with an upward opening;
placing dry ice in the cooling chamber, and reducing the temperature of the valve seat to enable the valve seat to shrink due to cooling;
and continuously vertically lifting the lifting rod to lift the whole valve seat dismounting device, so that the valve seat dismounting device upwards demounts the valve seat.
In one embodiment:
when the tray seals the lower opening of the valve seat, the gap between the inner side of the valve seat and the outer circle of the tray is sealed by adopting a plugging object, so that the leakage of the cooling cavity is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings referred to in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings may be obtained from these drawings without inventive effort.
FIG. 1 shows a three-dimensional view of a valve seat removal device in an embodiment of the present invention (with the fingers in an expanded state);
FIG. 2 shows a cross-sectional view of a valve seat removal device in an embodiment of the present invention;
one form of valve housing and valve seat engagement in the present embodiment is shown in FIG. 3;
FIG. 4 shows a three-dimensional view of a valve seat removal device in an embodiment of the present invention (maximum spread of the fingers);
FIG. 5 shows a three-dimensional view of a valve seat removal device in an embodiment of the present invention (with the fingers in a stowed state);
FIG. 6 is a schematic view of the tray and valve seat enclosing a cooling chamber.
Icon: 11-a valve housing; 12-a valve seat; 13-a disc; 14-a boom; 15-screw rod; 16-a tray; 17-a hook claw; 18-a stem portion; 19-a hook; 20-central axis; 21-a through hole; 22-lower mouth of valve seat; 23-a cooling chamber; 24-rotating disc; 25-hanging scaffold; 26-a connecting ring portion; 27-a snap ring; 28-step surface; 29-a hinged seat; a 30-U shaped portion; 31-a pin shaft; 32-a lifting ring; 33-spherical arc surface; 34-an arc-shaped surface; 35-end hook; 36-arc surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the terms are only used for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms "first," "second," and the like in the description of the present invention are only used for distinguishing between the descriptions and are not intended to indicate or imply relative importance.
Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present invention do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 and 2, the present embodiment provides a valve seat removing apparatus for removing a valve seat 12 from a valve housing 11. The valve housing 11 and the valve seat 12 are engaged in a manner as shown in fig. 3, that is, the valve seat 12 is in interference fit with the axial hole formed in the valve housing 11 through the outer peripheral surface thereof.
Referring again to fig. 1 and 2, the seat removing apparatus includes a disc 13 and a lifting rod 14; a plurality of hooks 17 distributed along the circumferential direction are connected on the circumferential direction of the disk piece 13; the hook 17 comprises a rod part 18 and a hook part 19 formed by bending the lower end of the rod part 18 towards the outside, the upper end of the rod part 18 is hinged with the disk 13, so that the hook 17 can swing inwards and outwards relative to the central axis 20 of the disk 13; the middle of the disk 13 is provided with a through hole 21; the lifting rod 14 comprises a screw 15 and a tray 16; the lower end of the screw 15 is fixedly connected to the middle position of the tray 16; the threaded rod 15 of the lifting bar 14 passes through the through hole 21 and forms a screw fit with the through hole 21 so that the tray 16 can move vertically relative to the disc 13 and the fingers 17 to different heights laterally supporting the stem 18 of each finger 17.
The application method of the valve seat dismounting device in the scheme comprises the following steps: retracting the hooks 17 by rotating the drop down tray 16 to pass the seat removing device through the seat 12; rotating the disc 24 to lower the hook 17 relative to the lifting rod 14 so that the hook 17 is spread laterally to the lower end face of the vertically corresponding valve seat 12; lifting the boom 14 vertically to make the hook 17 hook the valve seat 12 and make the tray 16 close the lower opening of the valve seat 12, so that the valve seat 12 and the tray 16 enclose a cooling chamber 23 (see fig. 6 for cooperation); dry ice is placed in the cooling chamber 23, and the temperature of the valve seat 12 is reduced to be cooled and shrunk; the lifting boom 14 continues to be lifted vertically to lift the entire seat removing apparatus, causing the seat removing apparatus to remove the seat 12 upwardly.
In the scheme, the arranged tray 16 is used as a lateral supporting structure of the hook claw 17, and the relative height of the hook claw 17 is adjusted by combining the spiral matching relationship of the screw rod 15 and the disc piece 13 so as to adjust the supported position and the opening size of the hook claw 17 to be matched with the valve seat 12 to be disassembled; on the other hand, the tray 16 can close the lower opening of the valve seat 12 to enclose a cooling chamber 23 for placing a cooling object, so that the valve seat 12 can be cooled and shrunk, and the resistance of the valve body to the disassembly of the valve seat 12 is reduced.
Therefore, the valve seat dismounting device in the scheme has the beneficial effects that the valve seat 12 is convenient and labor-saving to dismount, and the mounting surface of the valve seat 12 is not easy to damage.
In this embodiment, the disc 13 includes a rotating disc 24 and a hanging disc 25, the hanging disc 25 being connected between the rotating disc 24; the hook 17 is connected to the rotating disc 24; the screw 15 of the lifting rod 14 passes through the rotating disc 24 and the hanging scaffold 25, the screw 15 and the rotating disc 24 form a spiral fit, and the perforated hole of the hanging scaffold 25 is spaced from the screw 15. In this arrangement, the platform 25 and the fingers 17 connected thereto do not have to rotate as the rotary plate 24 rotates relative to the threaded rod 15. In the scheme, the lower part of the rotating disc 24 is radially and inwardly reduced into a connecting ring part 26, and a clamping ring 27 is clamped on the periphery of the connecting ring part 26; the platform 25 is rotatably restrained between the snap ring 27 and a step surface 28 at the upper end of the connecting ring portion 26.
The lower surface of the hanging scaffold 25 in the scheme is distributed with a plurality of hinge seats 29 distributed along the circumferential direction; the upper part of the hook claw 17 is provided with a U-shaped part 30 which is opened upwards, the U-shaped part 30 is clamped into the hinge seat 29, and the hinge seat 29 is pivoted through a pin shaft 31. The hinge seat 29 may be a protrusion protruding downward from the lower surface of the hanging scaffold 25.
The upper end of the screw rod 15 in the scheme is detachably connected with a lifting ring 32 and can be used for connecting lifting equipment.
In this embodiment, the tray 16 is a concave dish-like structure, which makes it easier to contain the cooling substance or more cooling substance, such as dry ice. Optionally, the upper surface of the tray 16 is a concave spherical arc surface 33; the hook portion 19 is of a U-shaped hook structure, and its lower surface is a concave arc surface 34.
In this embodiment, the hook 17 has a retracted state as shown in fig. 5 and an expanded state as shown in fig. 1 (a state at the time of maximum expansion is shown in fig. 4) according to a change in the relative positions of the disc 13 and the boom 14; when the fingers 17 are in the stowed condition, each finger 17 is restrained within the tray 16 by the contact engagement between the arcuate lower surface of its hook portion 19 and the upper surface of the tray 16, the lower portion of the finger 17. This facilitates transport, storage etc. of the device. When needed, the device is adjusted to fit the fingers 17 to the size of the valve seat 12.
In this embodiment, the hook-shaped portion 19 has a U-shaped hook structure, the outer end of which is bent outward to form a tail hook 35, and the upper surface of the tail hook 35 is a convex surface 36 protruding upward. The convex surface 36 of the end hook 35 can easily engage the lower end surface of the valve seat 12.
The scheme also provides a valve seat 12 dismounting method based on the valve seat dismounting device, and the method comprises the following steps:
retracting the fingers 17 and passing the seat removing means downwardly through the seat 12; rotating the disc 24 to drive the hooks 17 to descend relative to the disc 13, so that the hooks 17 are laterally spread to the lower end face of the vertically corresponding valve seat 12;
vertically lifting the boom 14 to make the hook 17 hook the valve seat 12 and make the tray 16 correspond to the lower opening of the valve seat 12, so that the valve seat 12 and the tray 16 enclose a cooling chamber 23 which is opened upwards; optionally, when the tray closes the lower opening of the valve seat, a gap between the inner side of the valve seat and the outer circle of the tray is sealed by using a sealing object such as cellophane or other forms so as to avoid leakage of the cooling chamber;
dry ice is placed in the cooling chamber 23, and the temperature of the valve seat 12 is reduced to be cooled and shrunk;
the lifting boom 14 continues to be lifted vertically to lift the entire seat removing apparatus, causing the seat removing apparatus to remove the seat 12 upwardly.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A valve seat dismounting device is used for dismounting a valve seat from a valve shell, and is characterized in that:
comprises a disc and a lifting rod;
a plurality of hooks distributed along the circumferential direction are connected on the circumferential direction of the disc piece; the hook claw comprises a rod part and a hook-shaped part which is formed by bending the lower end of the rod part towards the outer side, and the upper end of the rod part is hinged to the disc part so that the hook claw can swing inwards and outwards relative to the central axis of the disc part; a through hole is formed in the middle of the disc piece;
the lifting rod comprises a screw and a tray; the lower end of the screw rod is fixedly connected to the middle position of the tray; the screw rod of the lifting rod penetrates through the through hole and forms a spiral fit with the through hole, so that the tray can vertically move relative to the disc piece and the hooks to different heights for laterally supporting the rod parts of the hooks.
2. The seat removing apparatus according to claim 1, wherein:
the disc piece comprises a rotating disc and a hanging scaffold, and the hanging scaffold is connected between the rotating discs; the hook claw is connected with the rotating disc;
the screw rod of the lifting rod penetrates through the rotating disc and the hanging scaffold, the screw rod and the rotating disc are in spiral fit, and the through hole of the hanging scaffold is spaced from the screw rod.
3. The seat removing apparatus according to claim 2, wherein:
the lower part of the rotating disk is radially and inwardly reduced into a connecting ring part, and a clamping ring is clamped on the periphery of the connecting ring part; the hanging scaffold is rotatably limited between the snap ring and the step surface at the upper end of the connecting ring part.
4. The seat removing apparatus according to claim 2, wherein:
a plurality of hinge seats distributed along the circumferential direction are distributed on the lower surface of the hanging scaffold;
the upper portion of hook sets up to open-ended U type portion up, and articulated seat is gone into to U type portion card to through round pin axle pin joint in articulated seat.
5. The seat removing apparatus according to claim 1, wherein:
the upper end of the screw rod is detachably connected with a hanging ring.
6. The seat removing apparatus according to claim 1, wherein:
the tray is a concave disc-shaped structure.
7. The seat removing apparatus according to claim 6, wherein:
the upper surface of the tray is a concave spherical cambered surface;
the hook-shaped part is of a U-shaped hook-shaped structure, and the lower surface of the hook-shaped part is a downward convex arc-shaped surface;
the claw has a retracted state; when the fingers are in the stowed position, each finger is restrained within the tray by the contact engagement between the arcuate lower surface of its hook and the upper surface of the tray.
8. The seat removing apparatus according to claim 1, wherein:
the hook-shaped part is of a U-shaped hook-shaped structure, the outer end of the hook-shaped part bends outwards and extends to form a tail hook, and the upper surface of the tail hook is a convex arc surface protruding upwards.
9. A valve seat removing method based on the valve seat removing device according to any one of claims 1 to 8, the method comprising:
retracting the hook claw, and enabling the valve seat dismounting device to downwards penetrate through the valve seat; rotating the disc piece to drive the hook claw to descend relative to the disc piece, so that the hook claw is laterally expanded to the lower end face of the vertically corresponding valve seat;
vertically lifting the lifting rod to enable the hook claw to hook the valve seat and enable the tray to correspond to the lower opening of the valve seat, and enabling the valve seat and the tray to enclose a cooling chamber with an upward opening;
placing dry ice in the cooling chamber, and reducing the temperature of the valve seat to enable the valve seat to shrink due to cooling;
and continuously vertically lifting the lifting rod to lift the whole valve seat dismounting device, so that the valve seat dismounting device upwards demounts the valve seat.
10. The valve seat removing method according to claim 9, wherein:
when the tray seals the lower opening of the valve seat, the gap between the inner side of the valve seat and the outer circle of the tray is sealed by adopting a plugging object, so that the leakage of the cooling cavity is avoided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911322439.5A CN110977872A (en) | 2019-12-20 | 2019-12-20 | Valve seat dismounting device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911322439.5A CN110977872A (en) | 2019-12-20 | 2019-12-20 | Valve seat dismounting device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110977872A true CN110977872A (en) | 2020-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911322439.5A Pending CN110977872A (en) | 2019-12-20 | 2019-12-20 | Valve seat dismounting device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110977872A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112428221A (en) * | 2020-11-10 | 2021-03-02 | 广东韶钢工程技术有限公司 | Safety dismounting device for valve cover of regulating valve and using method of safety dismounting device |
| CN112847244A (en) * | 2020-12-28 | 2021-05-28 | 福建恒杰塑业新材料有限公司 | Quick dismounting device for inner flange of pipe fitting |
| CN113814933A (en) * | 2021-09-07 | 2021-12-21 | 山东汇金股份有限公司 | Tool for disassembling differential case assembly |
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| JPH10266119A (en) * | 1997-03-24 | 1998-10-06 | Hokkaido Supiritsuton Kogyo Kk | Pulling method for block |
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| CN112428221A (en) * | 2020-11-10 | 2021-03-02 | 广东韶钢工程技术有限公司 | Safety dismounting device for valve cover of regulating valve and using method of safety dismounting device |
| CN112847244A (en) * | 2020-12-28 | 2021-05-28 | 福建恒杰塑业新材料有限公司 | Quick dismounting device for inner flange of pipe fitting |
| CN113814933A (en) * | 2021-09-07 | 2021-12-21 | 山东汇金股份有限公司 | Tool for disassembling differential case assembly |
| CN113814933B (en) * | 2021-09-07 | 2022-11-22 | 山东汇金股份有限公司 | Tool for disassembling differential case assembly |
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Application publication date: 20200410 |
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| RJ01 | Rejection of invention patent application after publication |