CN110962074A - Self-operated pressure reducing valve seat dismounting tool and method - Google Patents
Self-operated pressure reducing valve seat dismounting tool and method Download PDFInfo
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- CN110962074A CN110962074A CN201911259707.3A CN201911259707A CN110962074A CN 110962074 A CN110962074 A CN 110962074A CN 201911259707 A CN201911259707 A CN 201911259707A CN 110962074 A CN110962074 A CN 110962074A
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- valve seat
- pressing device
- pressure reducing
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- clamping device
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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
- B25B27/24—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 mounting or demounting valves
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- Details Of Valves (AREA)
Abstract
The invention belongs to the technical field of valve installation and maintenance, and particularly relates to a self-operated pressure reducing valve seat dismounting tool and a self-operated pressure reducing valve seat dismounting method. Comprises a clamping device, a bearing and a pressing device; the bearing is sleeved on the clamping device, the pressing device is pressed above the bearing, and two through holes are formed in two ends of the pressing device respectively and used for fixing the pressing device and the valve body through bolts. The tool with only the claw structure is used for fastening the valve seat, and the tool is not axially positioned in the fastening process because the valve seat groove is shallow, so that the tool is easy to slip and separate from the valve seat groove. By using the tool, the clamping device can be axially positioned through the pressing device, the protruding part at the top of the clamping device is prevented from sliding out of the valve seat groove, the thrust bearing can reduce the friction between the clamping device and the pressing device, the clamping device can be connected with the torque wrench, and the tightening torque of the valve seat is quantitatively controlled, so that the sealing between the valve seat and the valve body is ensured; the valve seat can not be damaged, the tightening torque of the valve seat can be ensured, and the convenience of operation can be improved.
Description
Technical Field
The invention belongs to the technical field of valve installation and maintenance, and particularly relates to a self-operated pressure reducing valve seat dismounting tool and a self-operated pressure reducing valve seat dismounting method.
Background
The self-operated pressure reducing valve of the nuclear power station is generally used in a gaseous medium system, such as a nitrogen system, a compressed air system and the like, and is used for leading a valve outlet medium to a required pressure value of the system.
The sealing performance of the self-operated pressure reducing valve plays a decisive role in realizing the functions of the valve. The sealing part of the valve is divided into: the sealing between the valve clack and the valve seat, the sealing between the valve seat and the valve body and the sealing between the valve rod and the packing.
Wherein the sealing performance between the valve seat and the valve body is the most difficult to guarantee.
The reason is that the valve seat of the self-operated pressure reducing valve is connected with the valve body through threads, and a sealing gasket is arranged between the valve seat and the valve body, but the effective sealing of the gasket is difficult to ensure through a quantitative torque fastening method.
Because the valve seat is installed in the valve cavity, and the shape of the valve seat is irregular, the valve seat cannot be fastened by using a torque wrench by adopting a conventional bolt fastening method.
Therefore, a set of self-operated pressure reducing valve seat dismounting tool is needed to be designed according to the specific shape of the valve seat and the specific size of the valve cavity, and is used for dismounting and mounting the self-operated pressure reducing valve seat and optimizing the dismounting and mounting process of the pressure reducing valve seat.
Disclosure of Invention
In view of the above disadvantages, the present invention provides a self-operated pressure reducing valve seat assembling and disassembling tool and method.
The technical scheme of the invention is as follows:
a self-operated pressure reducing valve seat dismounting tool comprises a clamping device, a bearing and a pressing device;
the bearing is sleeved on the clamping device, the pressing device is pressed above the bearing, and two through holes are formed in two ends of the pressing device respectively and used for fixing the pressing device and the valve body through bolts.
The utility model provides a self-operated relief pressure valve disk seat assembly and disassembly tools, chucking device is a whole, two kinds of structures about being divided into, and the substructure is the cylinder, and superstructure is the cuboid, the center pin of cuboid structure is coaxial with the center pin of lower part cylinder structure.
A self-operated pressure reducing valve seat dismounting tool is characterized in that a bearing can be conveniently lowered due to the upper cuboid structure, and torque transmission of a torque wrench is facilitated;
two semicircular bulges are arranged on two sides of the edge of the bottom of the cylindrical body at intervals of 180 degrees, and the shape and the size of each bulge are matched with the groove of the valve seat, so that torque can be transmitted to the valve seat when the clamping device rotates.
The utility model provides a self-operated relief pressure valve disk seat assembly and disassembly tools, the bearing is thrust bearing, can reduce the friction between chucking device and the closing device, increases device life.
A self-operated pressure reducing valve seat dismounting tool is characterized in that a pressing device is of a long strip structure, a circular ring structure is arranged in the middle of the pressing device, and two ends of the pressing device 1 are respectively provided with a through hole for fixing the pressing device with a valve body through bolts.
The size of the through hole is matched with the size of a central circle of a flange bolt in the pressure reducing valve, so that the fixing of a pressing device and a valve body is realized.
The utility model provides a formula of relying on oneself relief pressure valve disk seat assembly and disassembly tools, the central ring size of ring structure matches with chucking device upper portion cuboid structure size to match with the bearing size.
The pressing device is used for fixing the clamping device to a fixed position of a valve body, and the protruding part of the clamping device is prevented from sliding out of the mounting groove of the valve seat along with the increase of fastening torque in the process of fastening the valve seat.
A method for assembling and disassembling a valve seat of a self-operated pressure reducing valve,
the method comprises the following steps that firstly, a pressure reducing valve is disassembled, parts such as a valve cage and a valve cover are taken away, two bolts with middle flanges separated by 180 degrees are reserved, and other bolts are all dismounted;
secondly, clamping the protruding part of the clamping device with the valve seat groove;
thirdly, installing a thrust bearing and a pressing device, wherein bolt holes of the pressing device need to be penetrated through two reserved middle flange bolts, then installing nuts, and fixing the pressing device on the valve body;
fourthly, fastening the square head at the top of the clamping device by using an open torque wrench, and dismantling or fastening the valve seat according to specified torque;
and fifthly, removing the dismounting tool of the valve seat of the pressure reducing valve after the operation is finished.
The invention has the beneficial effects that:
the valve seat of the self-operated pressure reducing valve is disassembled and assembled, and a simple disassembling tool is generally used, such as a knocking screwdriver or a fastening tool with a claw structure, so that the problems that the valve seat is damaged, the fastening torque cannot be guaranteed and the like exist in the using process.
For example, in the test of disassembling and assembling the valve seat by using the knocking screwdriver, because the diameter of the valve cavity is smaller and the depth is deeper, the force transmitted to the radial rotary valve seat by the knocking screwdriver is smaller, the force transmitted to the axial direction is larger, the damage to the valve seat is serious, and the tightening torque cannot be quantitatively ensured.
The tool with only the claw structure is used for fastening the valve seat, and the tool is not axially positioned in the fastening process because the valve seat groove is shallow, so that the tool is easy to slip and separate from the valve seat groove.
By using the tool, the clamping device can be axially positioned by the pressing device, the top convex part of the clamping device is prevented from sliding out of the valve seat groove, the thrust bearing can reduce the friction between the clamping device and the pressing device, the clamping device can be connected with the torque wrench, and the torque is screwed by the quantitative control valve seat, so that the sealing between the valve seat and the valve body is ensured.
By using the tool, the valve seat can not be damaged, the tightening torque of the valve seat can be ensured, and the convenience of operation can be improved.
Drawings
FIG. 1 is an assembly view of a self-operated valve seat assembly and disassembly tool of the present invention;
in the figure: 1. a pressing device; 2. a bearing; 3. and (4) a clamping device.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
The device comprises a clamping device 3, a bearing 2 and a pressing device 1; the bearing 2 is sleeved on the clamping device 3, the pressing device 1 is pressed above the bearing 2, and two through holes are respectively formed in two ends of the pressing device 1 and used for fixing the pressing device 1 with the valve body through bolts.
The clamping device 3 is a whole and is divided into an upper structure and a lower structure, the lower structure is a cylinder, the upper structure is a cuboid, and the central shaft of the cuboid structure is coaxial with the central shaft of the lower cylinder structure. The cuboid structure at the lower upper part can facilitate the downward placement of the bearing 2, and the torque wrench is convenient for torque transmission. Two semicircular bulges are arranged on two sides of the bottom edge of the cylindrical body at intervals of 180 degrees, and the shape and the size of each bulge are matched with the groove of the valve seat, so that the clamping device 3 can transmit torque to the valve seat when rotating.
The bearing 2 is a thrust bearing, so that the friction between the clamping device 3 and the pressing device 1 can be reduced, and the service life of the device is prolonged.
The pressing device 1 is of a long strip structure, a circular ring structure is arranged in the middle of the pressing device 1, through holes are formed in the two ends of the pressing device 1 respectively and used for fixing the pressing device 1 with the valve body through bolts, and the size of each through hole is matched with the size of a central circle of a flange bolt in the pressure reducing valve, so that the pressing device 1 and the valve body are fixed;
the size of the central ring of the circular ring structure is matched with the size of the cuboid structure on the upper part of the clamping device 3, and is matched with the size of the bearing 2.
The pressing device 1 is used for fixing the clamping device 3 to a fixed position of a valve body, and prevents a convex part of the clamping device 3 from sliding out of a mounting groove of a valve seat along with the increase of fastening torque in the process of fastening the valve seat.
The specific operation is as follows:
the method comprises the following steps that firstly, a pressure reducing valve is disassembled, parts such as a valve cage and a valve cover are taken away, two bolts with middle flanges separated by 180 degrees are reserved, and other bolts are all dismounted;
secondly, clamping the protruding part of the clamping device 3 with the valve seat groove;
thirdly, installing a thrust bearing 2 and a pressing device 1, wherein bolt holes of the pressing device 1 need to be penetrated through two reserved middle flange bolts, then installing nuts, and fixing the pressing device 1 on the valve body;
fourthly, fastening the square head at the top of the clamping device 3 by using an open torque wrench, and dismantling or fastening the valve seat according to specified torque;
and fifthly, removing the dismounting tool of the valve seat of the pressure reducing valve after the operation is finished.
Claims (9)
1. A self-operated pressure reducing valve seat dismounting tool comprises a clamping device, a bearing and a pressing device;
the method is characterized in that: the bearing is sleeved on the clamping device, the pressing device is pressed above the bearing, and two through holes are formed in two ends of the pressing device respectively and used for fixing the pressing device and the valve body through bolts.
2. The self-operated valve seat dismounting tool for the pressure reducing valve according to claim 1, wherein: the clamping device is a whole and is divided into an upper structure and a lower structure, the lower structure is a cylinder, the upper structure is a cuboid, and the central shaft of the cuboid structure is coaxial with the central shaft of the lower cylinder structure.
3. The self-operated valve seat dismounting tool for the pressure reducing valve as claimed in claim 2, wherein: the upper cuboid structure can facilitate the downward placement of the bearing and the torque transmission of the torque wrench;
two semicircular bulges are arranged on two sides of the edge of the bottom of the cylindrical body at intervals of 180 degrees, and the shape and the size of each bulge are matched with the groove of the valve seat, so that torque can be transmitted to the valve seat when the clamping device rotates.
4. The self-operated valve seat dismounting tool for the pressure reducing valve according to claim 1, wherein: the bearing is a thrust bearing, so that the friction between the clamping device and the pressing device can be reduced, and the service life of the device is prolonged.
5. The self-operated valve seat dismounting tool for the pressure reducing valve according to claim 1, wherein: the pressing device is of a long strip structure, a circular ring structure is arranged in the middle of the pressing device, and through holes are formed in two ends of the pressing device 1 respectively and used for fixing the pressing device with the valve body through bolts.
6. The self-operated valve seat dismounting tool for the pressure reducing valve according to claim 5, wherein: the size of the through hole is matched with the size of a central circle of a flange bolt in the pressure reducing valve, so that the compression device is fixed with the valve body.
7. The self-operated valve seat dismounting tool for the pressure reducing valve according to claim 5, wherein: the size of the central ring of the circular ring structure is matched with the size of a cuboid structure on the upper portion of the clamping device, and is matched with the size of the bearing.
8. The self-operated valve seat dismounting tool for the pressure reducing valve according to claim 1, wherein: the pressing device is used for fixing the clamping device to the fixed position of the valve body, and the protruding part of the clamping device is prevented from sliding out of the mounting groove of the valve seat along with the increase of fastening torque in the process of fastening the valve seat.
9. A self-operated pressure reducing valve seat dismounting method is characterized in that:
the method comprises the following steps that firstly, a pressure reducing valve is disassembled, parts such as a valve cage and a valve cover are taken away, two bolts with middle flanges separated by 180 degrees are reserved, and other bolts are all dismounted;
secondly, clamping the protruding part of the clamping device with the valve seat groove;
thirdly, installing a thrust bearing and a pressing device, wherein bolt holes of the pressing device need to be penetrated through two reserved middle flange bolts, then installing nuts, and fixing the pressing device on the valve body;
fourthly, fastening the square head at the top of the clamping device by using an open torque wrench, and dismantling or fastening the valve seat according to specified torque;
and fifthly, removing the dismounting tool of the valve seat of the pressure reducing valve after the operation is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911259707.3A CN110962074A (en) | 2019-12-10 | 2019-12-10 | Self-operated pressure reducing valve seat dismounting tool and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911259707.3A CN110962074A (en) | 2019-12-10 | 2019-12-10 | Self-operated pressure reducing valve seat dismounting tool and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110962074A true CN110962074A (en) | 2020-04-07 |
Family
ID=70033794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911259707.3A Pending CN110962074A (en) | 2019-12-10 | 2019-12-10 | Self-operated pressure reducing valve seat dismounting tool and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110962074A (en) |
-
2019
- 2019-12-10 CN CN201911259707.3A patent/CN110962074A/en active Pending
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