阅读说明：本技术 一种屏蔽主泵泵壳c型密封环清根装置 (Shielding main pump case C type sealing ring back chipping device ) 是由 王信东 李涛 王斌元 董宝泽 廖长城 耿加森 李松 曹阳 郦元辉 王超 王扬 于 2020-04-15 设计创作，主要内容包括：本发明涉及主泵维修技术领域,尤其涉及一种屏蔽主泵泵壳C型密封环清根装置。包括：吊臂、主轴动环、屏蔽板；主轴动环设置在屏蔽板与吊臂之间；主轴动环与吊臂转动连接,主轴动环与屏蔽板转动连接；主轴动环上设置有车刀。现有技术中,屏蔽装置、提升装置、切割装置三者相互独立,当需要三者协同工作时,屏蔽装置就需要通过连接结构与提升装置连接,而连接结构会对切割装置的回转产生干涉,从而影响施工效率。相较于现有技术,本发明通过主轴动环将屏蔽板、车刀、吊臂连接为一个统一的整体,使得吊臂与屏蔽板之间无需设置其他连接结构,从而为车刀的回转预留了充足的空间,进而提高了施工效率。(The invention relates to the technical field of main pump maintenance, in particular to a C-shaped sealing ring back chipping device for a pump shell of a shielding main pump. The method comprises the following steps: the suspension arm, the main shaft moving ring and the shielding plate are arranged on the main shaft; the main shaft rotating ring is arranged between the shielding plate and the suspension arm; the main shaft rotating ring is rotationally connected with the suspension arm and the shielding plate; the main shaft rotating ring is provided with a turning tool. Among the prior art, shield assembly, hoisting device, cutting device three are independent each other, and when needing three collaborative work, shield assembly just needs to be connected with hoisting device through connection structure, and connection structure can produce the interference to cutting device's gyration to influence the efficiency of construction. Compared with the prior art, the shield plate, the turning tool and the suspension arm are connected into a unified whole through the main shaft moving ring, so that other connecting structures are not required to be arranged between the suspension arm and the shield plate, sufficient space is reserved for the turning of the turning tool, and the construction efficiency is improved.)

1. The utility model provides a shield main pump case C type sealing ring back chipping device which characterized in that: the method comprises the following steps: the suspension arm (1), the main shaft rotating ring (2) and the shielding plate (3);

the main shaft rotating ring (2) is arranged between the shielding plate (3) and the suspension arm (1);

the main shaft rotating ring (2) is rotationally connected with the suspension arm (1), and the main shaft rotating ring (2) is rotationally connected with the shielding plate (3);

and a turning tool (2111) is arranged on the main shaft rotating ring (2).

2. The apparatus of claim 1, wherein the means for back-chipping a C-ring seal of a pump casing of a canned main pump comprises: a fixed shaft (23) is further arranged between the main shaft rotating ring (2) and the shielding plate (3), and the main shaft rotating ring (2) is sleeved on the fixed shaft (23).

3. The apparatus of claim 1, wherein the means for back-chipping a C-ring seal of a pump casing of a canned main pump comprises: a knife rest rod (21) and a knife rest rod counterweight (22) are symmetrically arranged on two sides of the main shaft rotating ring (2);

one end of the cutter frame rod (21) is connected with the main shaft rotating ring (2), and the other end of the cutter frame rod (21) is connected with the turning tool (2111).

4. The apparatus of claim 3, wherein the means for back-chipping a C-ring seal of a pump casing of a canned main pump comprises: a tool rest (211) and a tool feeding device (212) are further arranged at one end of the tool rest rod (21) far away from the main shaft rotating ring (2);

the turning tool (2111) is connected with the tool rest rod (21) through the tool rest (211);

the feed device (212) corresponds to the turning tool (2111).

5. The apparatus of claim 1, wherein the means for back-chipping a C-ring seal of a pump casing of a canned main pump comprises: the turning machine is characterized by further comprising a power device (4), wherein the power device (4) comprises a main shaft cylindrical gear (41) and a turning motor (42);

the main shaft cylindrical gear (41) is fixedly connected with the main shaft rotating ring (2);

the main shaft cylindrical gear (41) is in transmission connection with the turning motor (42).

6. The apparatus of claim 1, wherein the means for back-chipping a C-ring seal of a pump casing of a canned main pump comprises: the lifting device (11) is further included, and the lifting device (11) comprises a bolt (111), a lifting motor (112) and an idler chain wheel (113);

the suspension arm (1) is provided with a through hole (12) corresponding to the bolt (111);

a chain (1111) is fixedly connected to the bolt (111);

the idle chain wheel (113) is in transmission connection with the lifting motor (112) through the chain (1111).

7. The apparatus of claim 6, wherein the means for back-chipping a C-ring seal of a pump casing of a canned main pump comprises: and a driving chain wheel is arranged on the lifting motor (112), and corresponds to the inertia chain wheel (113).

8. The apparatus of claim 6, wherein the means for back-chipping a C-ring seal of a pump casing of a canned main pump comprises: and a hanging screw rod (1112) is further arranged on the bolt (111), and the hanging screw rod (1112) corresponds to the through hole (12).

9. The apparatus of claim 1, wherein the means for back-chipping a C-ring seal of a pump casing of a canned main pump comprises: the length of the suspension arm (1) is larger than the distance between the turning tool (2111) and the main shaft rotating ring (2).

10. The apparatus of claim 1, wherein the means for back-chipping a C-ring seal of a pump casing of a canned main pump comprises: the number of the suspension arms (1) is at least 3, and the included angles between every two adjacent suspension arms (1) are equal.

Technical Field

The invention relates to the technical field of main pump maintenance, in particular to a C-shaped sealing ring back chipping device for a pump shell of a shielding main pump.

Background

In the nuclear power station, shielding the main pump is known as the heart of the nuclear power station, and plays a vital role in the safe and reliable operation of a reactor system of the nuclear power station.

Taking the AP1000 canned main pump as an example, although the design life reaches 60 years, there is a risk of damage to the canned main pump during actual use. When the shielded main pump is damaged, the damaged shielded main pump needs to be removed, the bottom of the pump shell is opened, and then the C-shaped sealing ring left on the end face of the pump shell needs to be cleaned. However, after the opening of the bottom of the pump shell, the environmental dose is very high, meanwhile, the pump shell is far away from the ground, the shielding device is needed, the lifting device and the cutting device are cooperatively used, but the three are mutually independent, in the cooperative use process of the three, the lifting device and the shielding device are directly connected, the interference between the connecting part between the lifting device and the shielding device and the cutting device is caused, the cutting device cannot completely rotate, the cutting device cannot continuously cut the C-shaped sealing ring, the operation of operators is greatly inconvenient, and the construction efficiency is greatly influenced.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides a C-shaped sealing ring back-chipping device for a pump shell of a shielding main pump.

In order to solve the technical problems, the invention provides the following technical scheme:

a shielded main pump casing C-shaped sealing ring back chipping device comprises: the suspension arm, the main shaft moving ring and the shielding plate are arranged on the main shaft; the main shaft rotating ring is arranged between the shielding plate and the suspension arm; the main shaft rotating ring is rotationally connected with the suspension arm and the shielding plate; the main shaft rotating ring is provided with a turning tool.

Aim at pump case bottom opening with the shield plate, with the bolt hole fixed connection of davit and pump case flange face, make shield plate and the inseparable laminating of pump case bottom opening on the one hand to effectively shield the radiation, on the other hand fixes the main shaft rotating ring at operating position, and then fixes the lathe tool at operating position, will drive the lathe tool and rotate jointly when the main shaft rotating ring rotates, thereby cut C type sealing ring. The main shaft rotating ring is respectively connected with the suspension arm and the shielding plate in a rotating mode, so that the main shaft rotating ring can drive the turning tool to rotate between the suspension arm and the shielding plate. On the one hand, the main shaft rotating ring plays a role in connecting the suspension arm with the shielding plate, so that the suspension arm, the shielding plate and the turning tool are connected into a unified whole, other connecting parts do not need to be arranged between the suspension arm and the shielding plate, and on the other hand, a certain distance is reserved between the suspension arm and the shielding plate through the main shaft rotating ring. From this, sufficient gyration space has been left for the gyration of the lathe tool of setting on the main shaft rotating ring for the lathe tool can accomplish complete gyration under the drive of main shaft rotating ring, thereby provides convenience for operating personnel's operation, and then effectual improvement the efficiency of construction.

Further, a fixed shaft is arranged between the main shaft moving ring and the shielding plate, and the main shaft moving ring is sleeved on the fixed shaft.

Further, a knife rest rod and a knife rest rod balance weight are symmetrically arranged on two sides of the main shaft rotating ring; one end of the cutter frame rod is connected with the main shaft moving ring, and the other end of the cutter frame rod is connected with the turning tool.

Further, a tool rest and a tool feeding device are arranged at one end of the tool rest rod, which is far away from the main shaft moving ring; the turning tool is connected with the tool rest rod through the tool rest; the feed gear corresponds to the turning tool.

Further, the device also comprises a power device, wherein the power device comprises a main shaft cylindrical gear and a turning motor; the main shaft cylindrical gear is fixedly connected with the main shaft moving ring; the main shaft cylindrical gear is in transmission connection with the turning motor.

Further, the lifting device comprises a bolt, a lifting motor and an inertia chain wheel; the suspension arm is provided with a through hole corresponding to the bolt; the bolt is fixedly connected with a chain; the inertia chain wheel is in transmission connection with the lifting motor through a chain.

Furthermore, a driving chain wheel is arranged on the lifting motor and corresponds to the inertia chain wheel.

Furthermore, the bolt is also provided with a hanging screw rod, and the hanging screw rod corresponds to the through hole.

Furthermore, the length of the suspension arm is larger than the distance between the turning tool and the main shaft rotating ring.

Furthermore, the number of the suspension arms is at least 3, and the included angles between every two adjacent suspension arms are equal.

Compared with the prior art, the invention has the following advantages:

the shield plate is indirectly connected with the suspension arm through the main shaft rotating ring instead of being directly connected with the suspension arm, so that only the main shaft rotating ring is arranged between the shield plate and the suspension arm, and other connecting structures are not arranged between the shield plate and the suspension arm, and the turning tool connected to the main shaft rotating ring is not shielded by other connecting structures between the shield plate and the main shaft rotating ring, so that the turning tool can completely rotate, operation of operators is greatly facilitated, and the construction efficiency is improved.

The lifting motor and the turning motor are arranged on the suspension arm, the pump shell is far away from the ground in actual operation, the bottom opening of the pump shell is downward, and when the suspension arm is arranged on the flange surface of the pump shell, the motor connecting line for supplying power to the lifting motor and the turning motor naturally droops under the action of gravity, so that the situation that the motor connecting line influences the complete rotation of the turning tool is avoided.

The suspension arm can be effectively lifted by utilizing the matching of the chain, the driving chain wheel and the inertia chain wheel, and the wrap angle can be effectively increased, so that the safety and the reliability during lifting are effectively improved.

The length of the suspension arm is larger than the distance between the turning tool and the main shaft moving ring, so that when the suspension arm is connected with the flange surface of the pump shell through the lifting device, the lifting device cannot interfere with the rotation of the turning tool.

The cooperation of bolt, inertia sprocket, lifting motor, chain can promote the device on the one hand wholly to the same height with pump case flange face, on the other hand can wholly adjust the device to the horizontality.

The whole position of the device can be finely adjusted by utilizing the hoisting screw rod, so that the shielding plate and the turning tool can be accurately moved to corresponding working positions.

At least 3 suspension arms are provided, and the included angles between two adjacent suspension arms are equal, so that the whole device is kept horizontal in actual operation.

Drawings

FIG. 1: and (7) bottom view.

FIG. 2: side view.

In the figure: 1-suspension arm, 11-lifting device, 12-port, 111-bolt, 112-lifting motor, 113-idler chain wheel, 1111-chain, 1112-hanging screw, 2-main shaft rotating ring, 21-tool holder rod, 22-tool holder rod counterweight, 211-tool holder, 212-tool feeding device, 2111-turning tool, 3-shielding plate, 4-power device, 41-main shaft cylindrical gear, 42-turning motor, 51-pump shell flange surface and 521-C type sealing ring.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

A shielded main pump casing C-shaped sealing ring back chipping device comprises: the device comprises a suspension arm 1, a main shaft moving ring 2, a shielding plate 3, a lifting device 11 and a power device 4. One end of the boom 1 is provided with a through opening 12. The lifting device 11 comprises a bolt 111, a lifting motor 112 and an idler sprocket 113. Bolts 111 correspond to bolt holes in the pump casing flange surface 51, and fastening screws 1112 are fixedly connected to the bolts 111, and the fastening screws 1112 can pass through the through holes 12 provided at one end of the boom 1. A chain 1111 is also fixedly connected to the bolt 111. The idle chain wheel 113 is arranged at one end of the suspension arm 1 provided with the through hole 12, the lifting motor 112 is arranged at one end of the suspension arm 1 provided with the through hole 12, the suspension arm 1 is provided with a speed reducer corresponding to the lifting motor 112, and the lifting motor 112 is provided with a driving chain wheel corresponding to the idle chain wheel 113. The chain 1111 is threaded through the through hole 12, and the chain 1111 is wound around the idler sprocket 113 and the driving sprocket, so that the driving sprocket can be in driving connection with the idler sprocket 113 through the chain 1111.

Wherein, there are at least 3 davits 1, and the contained angle between two adjacent davits 1 is 120, and correspondingly, the number of lifting devices 11 is the same with the number of davits 1.

The driving shaft collar is arranged between the shielding plate 3 and the suspension arm 1, the driving shaft collar and the shielding plate 3 are arranged concentrically, the driving shaft collar is rotatably connected with the suspension arm 1, a fixed shaft 23 is further arranged between the driving shaft collar and the shielding plate 3, the driving shaft collar is sleeved on the fixed shaft 23, and the fixed shaft 23 is fixedly connected with the shielding plate 3. The two sides of the driving shaft ring are symmetrically provided with a cutter frame rod 21 and a cutter frame rod counterweight 22, and the influence of gravity on the cutter frame rod 21 is balanced by the cutter frame rod counterweight 22, so that the cutter frame rod 21 can be kept horizontal. The tool rest 211 is further arranged at one end of the tool rest bar 21 far away from the driving shaft collar, and a turning tool 2111 is arranged on the tool rest 211. Meanwhile, the tool rest bar 21 is further provided with a mounting groove in which a tool feeding device 212 is disposed, and the tool feeding device 212 corresponds to the turning tool 2111, so that the turning tool 2111 is fed through the tool feeding device 212.

The length of the boom 1 is greater than the distance between the turning tool 2111 and the main shaft rotating ring 2, that is, the length of the boom 1 is greater than the length of the cutter rest bar 21, so that when the boom 1 is connected with the pump shell flange through the lifting device 11, the lifting device 11 cannot interfere with the rotation of the turning tool 2111.

The power device 4 comprises a main shaft cylindrical gear 41 and a turning motor 42. The turning motor 42 is arranged at one end of the suspension arm 1 close to the driving shaft collar, and the suspension arm 1 is provided with a speed reducer corresponding to the turning motor 42. The main shaft cylindrical gear 41 is fixedly connected with the main shaft moving ring 2, and the main shaft cylindrical gear 41 is in transmission connection with the turning motor 42.

Taking 3 suspension arms as an example, in actual operation, the electrical and mechanical integrity of the whole device is checked, and whether the shielding performance of the shielding plate 3 is normal or not is confirmed. After the inspection is passed, the power line is connected with the lifting motor 112 and the corresponding speed reducer, the interval between the 3 bolts 111 is adjusted, the 3 bolts 111 are screwed into the bolt holes of the flange surface 51 of the pump shell until the edge of the bolt 111 is level with the lower plane of the pump shell, at this time, the chain 1111 is passed through the through hole 12 of the corresponding suspension arm 1, and the chain 1111 is manually wound on the corresponding idler sprocket 113 and the driving sprocket, so that the driving sprocket can be in transmission connection with the idler sprocket 113 through the chain 1111. At this moment, hang the heavy object in chain 1111 below and make chain 1111 tensioning, operation lift motor 112 and corresponding reduction gear rotate, and the drive sprocket of lift motor 112 passes through chain 1111 this moment and drives lazy sprocket 113 and rotate to promote davit 1, and then promote whole device. The state of boom 1 is adjusted by individually controlling the operation of each lift motor 112 until boom 1 is horizontal. At this time, all the lifting motors 112 are started simultaneously until the hanging screw 1112 penetrates through the through hole 12 on the suspension arm 1, after the nut is installed on the hanging screw 1112, all the lifting motors 112 are continuously started simultaneously until the shielding plate 3 is basically flush with the pump shell flange surface 51, at this time, the lifting motors 112 and the corresponding speed reducers are stopped, the nut installed on the hanging screw 1112 is screwed until the nut is abutted against the edge of the through hole 12 of the suspension arm 1, the nut is screwed continuously, so that the position of the suspension arm 1 is finely adjusted through the matching between the hanging screw 1112 and the nut, the position of the whole device is finely adjusted, until the shielding plate 3 moves to the working position, and the turning tool 2111 also moves to the corresponding working position synchronously. Dismantling the power cord of the lifting motor 112 and the corresponding speed reducer, installing the turning motor 42 and the power cord of the corresponding speed reducer, installing a battery for the feed device 212, checking whether sundries which possibly interfere the turning of the turning tool 2111 exist in the rotation space of the tool rest rod 21 and the tool rest rod counterweight 22, measuring the position of the suspension arm 1 by using a dial indicator after the checking is passed, and continuously performing fine adjustment by screwing a nut if the position has deviation. After the position of the boom 1 is adjusted to the set position, the turning motor 42 and the corresponding speed reducer are started, the feed device 212 is started, and at this time, the turning motor 42 drives the spindle cylindrical gear 41 to rotate, so that the spindle rotating ring 2 is driven to rotate through the spindle cylindrical gear 41, and the turning tool 2111 is driven to rotate by taking the spindle rotating ring 2 as an axis, thereby completing the cutting of the C-shaped sealing ring 521 located at the sealing weld. Wherein, the power cord connected to the turning motor 42 naturally droops under the action of gravity, and the turning motor 42 is arranged on the suspension arm 1, the drooped power cord will not enter the rotation space of the turning tool 2111, thereby the rotation of the turning tool 2111 will not be affected.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.