CN211136623U

CN211136623U - Grinding tool

Info

Publication number: CN211136623U
Application number: CN201921539366.0U
Authority: CN
Inventors: 高文霄; 王延韬; 李蜀丰
Original assignee: China Nuclear Industry Maintenance Co Ltd
Current assignee: China Nuclear Industry Maintenance Co Ltd
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2020-07-31
Anticipated expiration: 2029-09-17

Abstract

The utility model relates to a nuclear power station overhaul tool technical field, which provides a grinding tool used for grinding the sealing surface of a valve seat, the grinding tool comprises a fixed seat fixed on the valve seat, a movable tube telescopically arranged on the fixed seat, a rotating rod arranged on the movable tube and capable of rotating around the axial direction of the rotating rod, and a grinding head arranged at one end of the rotating rod used for extending into the valve seat; the utility model provides a grinding tool has following advantage: the grinding head is fixed on the valve seat through the fixed seat, and the downward pressure of the grinding head abutting against the surface to be ground is provided by the movable tube, so that the existing action of pressing down by using a manual hand is replaced, the operation intensity of an operator is reduced, and meanwhile, the grinding precision can be improved; in addition, the rotating rod drives the grinding head to rotate for grinding operation, and the grinding speed is improved.

Description

Grinding tool

Technical Field

The utility model relates to a nuclear power station overhauls instrument technical field, and more specifically says, relates to a grinding tool.

Background

After the stop valve runs on a nuclear power station unit for a long time, the sealing surface of the stop valve is defective and loses the original sealing performance due to various reasons such as operation extrusion, cold-heat conversion, fluid erosion, ionization corrosion and the like. At this time, the sealing surfaces of the valve flap and the valve seat need to be ground or polished to recover the optimal sealing effect and design level, and the potential safety hazard of the unit is eliminated.

At present, in a nuclear power plant, in daily and overhaul periods, a special grinding clamping fixture is manufactured by materials such as brass, aluminum and the like according to a valve structure for repairing a sealing surface after a stop valve is disassembled, and the special grinding clamping fixture is manually operated. The mode is the best choice for the conditions that the environment dosage rate is low and the defects of the sealing surface of the valve seat are small outside the control area, but the valve maintenance work in the control area is usually accompanied by certain environment dosage rate and contact dosage rate. Under the higher operational environment of radiation level, if meet valve seal face defect when serious, manual grinding inefficiency can make like this and make the staff receive too much radiation dose, all can cause negative effects in the aspect of personnel's health, radiation dose control.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a grinding tool to solve the technical problem that the grinding tool grinding efficiency that exists among the prior art is low.

In order to achieve the above object, the utility model discloses a technical scheme be a grinding tool for grind the sealed face of disk seat, grinding tool is including being used for being fixed in fixing base on the disk seat, set up in removal pipe on the fixing base, wear to locate remove the pipe and can wind self axial pivoted dwang, and set up in the dwang stretches into the grinding head of one end in the disk seat, it can follow to remove the pipe the axial displacement of dwang.

Furthermore, an operating part and a connecting part which are exposed outside the moving pipe are respectively formed at two ends of the rotating rod, the operating part is used for connecting a rotating mechanism which drives the rotating rod to rotate, and the connecting part is used for connecting the grinding head.

Furthermore, the grinding head is provided with a locking hole in an axial direction in a penetrating manner, the connecting portion is provided with a locking column penetrating through the locking hole, and the locking column is sleeved with a locking ring used for fixing the grinding head on the connecting portion.

Further, a bearing portion is connected between the connecting portion and the moving pipe.

Further, the bearing portion is a thrust bearing.

Further, the side of the fixed seat is provided with a fixed thread matched with the valve seat.

Furthermore, a fixing hole used for being matched with the valve seat is formed in the fixing seat.

Further, the fixing seat, the movable pipe and the rotating rod are coaxially arranged.

Furthermore, the fixing seat comprises a first fixing table and a second fixing table arranged on one side of the first fixing table far away from the grinding head, and a step structure is formed between the first fixing table and the second fixing table.

Furthermore, one end of the grinding head, which is far away from the rotating rod, is provided with a conical surface.

The utility model provides a grinding tool's beneficial effect lies in:

the grinding head is fixed on the valve seat through the fixed seat, and the downward pressure of the grinding head abutting against the surface to be ground is provided by the movable tube, so that the existing action of pressing down by using a manual hand is replaced, the operation intensity of an operator is reduced, and meanwhile, the grinding precision can be improved; in addition, the rotating rod drives the grinding head to rotate for grinding operation, and the grinding speed is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front view of an abrasive tool provided by an embodiment of the present invention;

fig. 2 is a front view of a rotating lever according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a polishing head provided in accordance with an embodiment of the present invention;

fig. 4 is a bottom view of a polishing head according to an embodiment of the present invention;

FIG. 5 is an enlarged view at "A" of FIG. 1;

fig. 6 is a front view of a first thrust bearing provided by an embodiment of the present invention;

fig. 7 is a front view of a second thrust bearing provided by an embodiment of the present invention;

fig. 8 is a sectional view of a fixing base provided in an embodiment of the present invention;

fig. 9 is a bottom view of the fixing base according to the embodiment of the present invention.

The figures are numbered:

fixed seat	1	Operation part	31	First fixed table	11
						Movable pipe	2	Connecting part	32	Second fixed table	12
Rotating rod	3	Bearing part	5	Locking hole	41
						Grinding head	4	Ball bearing	51	Locking column	321
Locking ring	322	Connecting upper ring	51	Connecting lower ring	52
						Ball bearing	53	Roller wheel	54

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected or indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention, and are not intended to indicate that a device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as indicating a number of technical features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. The following describes the specific implementation of the present invention in more detail with reference to specific embodiments:

as shown in fig. 1, the embodiment of the utility model provides a pair of grinding tool, it is used for grinding the sealed face of disk seat, and grinding tool includes fixing base 1, sets up removal pipe 2 on fixing base 1, wears to locate removal pipe 2 and can wind self axial pivoted dwang 3 to and set up in the grinding head 4 that dwang 3 is used for stretching into the one end in the disk seat, remove the axial displacement that pipe 2 can follow dwang 3.

The working principle of the abrasive tool of the present embodiment is as follows:

on being fixed in the disk seat with fixing base 1, the scalable removal pipe 2 that sets up on fixing base 1 of adjustment for the one end of dwang 3 that sets up in removing pipe 2 is just to treating the abrasive surface, will set up grinding head 4 butt on dwang 3 simultaneously on this treats the abrasive surface, utilizes manual or electric drive dwang 3 to rotate, and then drives grinding head 4 and rotates the grinding, and the abrasive surface is treated to grinding head 4 accessible self, also can be through setting up the grinding piece on grinding head 4.

The grinding tool provided by the embodiment has the beneficial effects that:

the fixed seat 1 is fixed on the valve seat, and the movable tube 2 provides downward pressure for the grinding head 4 to abut against the surface to be ground, so that the existing action of pressing down by using a manual hand is replaced, the operation intensity of an operator is reduced, and meanwhile, the grinding precision can be improved; in addition, the rotating rod 3 drives the grinding head 4 to rotate for grinding operation, so that the grinding speed is improved.

Further, both ends of the rotating lever 3 are formed with an operation portion 31 and a connecting portion 32 exposed to the outside of the moving pipe 2, and the operation portion 31 is used for connecting a rotating mechanism for driving the rotating lever 3; the connecting portion 32 is used to connect the polishing head 4. In this embodiment, the rotating mechanism may be a motor connected to the operating portion 31 for driving the rotating rod 3 to rotate.

As shown in fig. 2 to 5, the polishing head 4 further has a locking hole 41 formed therethrough, the connecting portion 32 has a locking column 321 formed therethrough and inserted into the locking hole 41, and the locking column 321 is fitted with a locking ring 322 for fixing the polishing head 4 to the connecting portion 32.

Referring to fig. 6 and 7, a bearing portion 5 is connected between the connecting portion 32 and the moving tube 2. It can be understood that the rotation of the connecting portion 32 in the moving tube 2 is made smoother by providing the bearing portion 5. Specifically, the bearing portion 5 is a thrust bearing. In the present embodiment, the thrust bearing is a special bearing for receiving an axial force exclusively, and the thrust bearing is used to transmit a force in the axial direction of the moving pipe 2 to the rotating rod 3 while the rotating rod 3 can be maintained to rotate within the moving pipe 2. In detail, the bearing portion 5 includes an upper connecting ring 51, a lower connecting ring 52, and balls 53 disposed between the upper connecting ring 51 and the lower connecting ring 52, or rollers 54 disposed between the upper connecting ring 51 and the lower connecting ring 52; the upper connecting ring 51 is connected to the moving tube 2, and the lower connecting plate 52 is connected to the polishing head 4.

Specifically, the outer diameter of the thrust bearing is smaller than the outer diameter of the polishing head 4 and larger than the outer diameter of the movement tube 2, and the inner diameter of the thrust bearing is larger than the inner diameter of the polishing head 4 and smaller than the inner diameter of the movement tube.

Further, the side of the fixed seat 1 is provided with a fixing thread for matching with the valve seat. It can be understood that the fixing seat 1 can be conveniently fixed on the valve seat by arranging the fixing thread, and can be conveniently detached from the valve seat.

Further, a fixing hole used for being matched with the valve seat is formed in the fixing seat 1. In this embodiment, through the bolt cooperation that sets up fixed orifices and disk seat, realize fixing base 1's quick dismantlement.

As shown in fig. 8 and 9, further, the cross section of the fixing base 1 is circular, the moving pipe 2 is a circular pipe, the rotating rod 3 is a circular rod, and the fixing base 1, the moving pipe 2 and the rotating rod 3 are all coaxially arranged. In this embodiment, remove the flexible direction of pipe 2 and be the axial of self, through with dwang 3, fixing base 1 and the coaxial setting of 2 three of removal pipe, on the overdraft can directly transmit to dwang 3 at the overdraft that produces when removing pipe 2 is flexible, realize the maximize of overdraft. In addition, the pressure applied to the surface to be ground can be more uniform through the design, and the grinding effect is improved.

Further, the fixed base 1 includes a first fixed table 11 and a second fixed table 12 disposed on a side of the first fixed table 11 away from the polishing head 4, and a step structure is formed between the first fixed table 11 and the second fixed table 12. It can be understood that the step structure formed by the first fixing platform 11 and the second fixing platform 12 is matched with the valve seat, so that the fixed seat 1 is prevented from falling into the valve seat when being fixed on the valve seat.

Further, the end of the grinding head 4 away from the connecting rod 3 is provided with a conical surface. In this embodiment, the conical surface of the polishing head 4 can make the polishing head 4 more closely fit to the surface to be polished of the valve seat, and the conical angle of the polishing head 4 is determined by the specific data of the valve seat.

Further, fixing base 1, removal pipe 2, dwang 3 and grinding head 4 select for use the brass preparation to form, can avoid grinding tool to damage the disk seat.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. An abrasive tool, characterized by: a sealed face for grinding disk seat, grinding means including being used for being fixed in fixing base on the disk seat, set up in removal pipe on the fixing base, wear to locate removal pipe just can be around self axial pivoted dwang, and set up in the dwang stretches into the grinding head of one end in the disk seat, it can follow to remove the pipe the axial displacement of dwang.

2. The abrasive tool of claim 1, wherein: an operating part and a connecting part which are exposed outside the moving pipe are respectively formed at two ends of the rotating rod, the operating part is used for connecting and driving a rotating mechanism for rotating the rotating rod, and the connecting part is used for connecting the grinding head.

3. The abrasive tool of claim 2, wherein: the grinding head is provided with a locking hole in an axial direction in a penetrating mode, a locking column penetrating through the locking hole is arranged on the connecting portion, and a locking ring used for fixing the grinding head on the connecting portion is sleeved on the locking column.

4. The abrasive tool of claim 3, wherein: a bearing portion is connected between the connecting portion and the moving pipe.

5. The abrasive tool of claim 4, wherein: the bearing portion is a thrust bearing.

6. The abrasive tool of any of claims 1-5, wherein: and the side surface of the fixed seat is provided with a fixed thread matched with the valve seat.

7. The abrasive tool of any of claims 1-5, wherein: the fixing seat is provided with a fixing hole matched with the valve seat.

8. The abrasive tool of any of claims 1-5, wherein: the fixing base the removal pipe with the dwang all sets up coaxially.

9. The abrasive tool of any of claims 1-5, wherein: the fixed seat comprises a first fixed table and a second fixed table arranged on one side, far away from the grinding head, of the first fixed table, and a step structure is formed between the first fixed table and the second fixed table.

10. The abrasive tool of any of claims 1-5, wherein: and a conical surface is arranged at one end of the grinding head far away from the rotating rod.