CN114684762A - Mounting tool for heat transfer pipe inspection positioner - Google Patents

Abstract

The invention discloses a heat transfer pipe inspection positioner mounting tool which comprises a hoisting component, a lifting component and a handheld component. The hoisting part comprises a hoisting support, the lower part of the hoisting support is connected with two positioning rods, and the two positioning rods are respectively connected with the steel wire rope. The lifting component comprises a positioner bracket, two guide sleeves are arranged on the upper portion of the positioner bracket, the steel wire rope penetrates through the guide sleeves, two guide pipes are connected to the lower portion of the positioner bracket, the guide pipes are sleeved outside the steel wire rope, and the positioner bracket is further connected with a handheld component. The guide tube is connected with the pushing and pulling device. The pulling device comprises a rope collecting disc, a motor and adapters, wherein the two guide pipes are respectively connected with the adapters, the two adapters are respectively connected with the rope collecting disc, and the two rope collecting discs are both connected with the motor. The positioning robot can be automatically installed on the tube plate of the water chamber, and is stabilized and adjusted through the balancing rod, so that the purposes of quick installation and reduction of the irradiation dose of personnel are achieved.

Description

Mounting tool for heat transfer pipe inspection positioner

Technical Field

The invention belongs to a nondestructive testing tool for heat transfer tubes of steam generators and similar equipment, and particularly relates to a mounting tool for a heat transfer tube inspection positioner.

Background

Steam generators (hereinafter referred to as SGs) are the second most important heavy equipment in nuclear power plants next to the core pressure vessel, and are one of the most faulty equipment in nuclear power plant operation. The inner surface of the SG water chamber, the main pipeline joint, the partition plate, the tube plate and thousands of heat transfer tubes are all the objects of SG in-service overhaul and evaluation, wherein the in-service overhaul and evaluation of the heat transfer tubes are the most complicated. The corrosion damage of the heat transfer pipe can cause the radioactive medium in the primary circuit to leak to the secondary circuit, thereby causing serious water pollution and endangering the safety of the primary circuit. Once a leakage accident occurs, the nuclear power station is forced to be shut down emergently, which causes great economic loss and potential safety hazard. Therefore, the regular on-line maintenance and evaluation of SG is the main means for avoiding unplanned shutdown.

The in-service maintenance work of the heat transfer pipe of the steam generator is mainly carried out in the water chamber. The water chamber end socket of the steam generator is hemispherical, and stainless steel is welded on the inner surface of the water chamber end socket. The head is divided into two water chambers of water inlet and water outlet by the semicircular clapboard. The water chamber sealing head is provided with four holes, two holes are reactor coolant inlet and outlet connecting pipes, and the other two holes are manholes for maintenance. The steam generator hydroecium is the high radiation region, and steam generator heat-transfer pipe is in service overhauld or is leaked and handle and need remote control special automatic maintenance equipment to accomplish in the hydroecium operation. The service equipment typically enters the water chamber through the steam generator manhole, so the service equipment is sized smaller than the manhole diameter to allow access to the steam generator interior by installation tools. Because the evaporimeter is bulky, and the environment has pollution and radiation, the mounting tool of current application has personnel's operating difficulties, degree of automation low scheduling problem.

Disclosure of Invention

The invention aims to provide a mounting tool for a heat transfer tube inspection positioner, which can enable a positioning robot to be automatically mounted on a tube plate of a water chamber, and stabilize and adjust the positioning robot through a balancing rod so as to achieve the purposes of quick mounting and reduction of the irradiation dose of personnel.

The technical scheme of the invention is as follows: a heat transfer tube inspection locator mounting tool comprises a hoisting component, a lifting component and a handheld component.

The hoisting part comprises a hoisting support, the lower part of the hoisting support is connected with two positioning rods, and the two positioning rods are respectively connected with the steel wire rope.

The lifting component comprises a locator bracket, two guide sleeves are arranged at the upper part of the locator bracket, the steel wire rope passes through the guide sleeves, two guide pipes are connected at the lower part of the locator bracket, the guide pipes are sleeved outside the steel wire rope,

and the positioner bracket is also connected with a handheld part.

The guide tube is connected with the pushing and pulling device.

The pulling device comprises a rope collecting disc, a motor and adapters, wherein the two guide pipes are connected with the adapters respectively, the two adapters are connected with the rope collecting disc respectively, and the two rope collecting discs are connected with the motor.

The handheld part is of a rod-shaped structure.

The invention has the beneficial effects that: the function of lifting the positioner onto the tube sheet and removing the positioner can be realized. By utilizing the relative motion principle of the conduit and the steel wire rope, the guide pipe is a flexible pipe and has the characteristic of certain rigidity, and the pusher drives the steel wire rope, so that the conduit is driven to move to the tube plate, and the effects of installation and positioning are achieved. The tool does not need to be adjusted after the crawler is conveyed to the surface of the tube plate, the locator is installed on the tube plate through the guide sleeve and the guide rod and then directly inserted into the heat transfer tube, the problem that the existing long rod is difficult to judge and operate manually when used is solved, and time, labor and radiation are saved. To quickly mount the positioner to the tube sheet, a long rod tool holding the components may assist in balancing the positioner. The long rod tool also has the function of installing a hoisting part.

Drawings

FIG. 1 is a schematic view of a heat transfer tube inspection positioner mounting tool according to the present invention;

fig. 2 is a schematic view of a hoisting member.

In the figure, a tube plate 1, a hoisting component 2, a steel wire rope 3, a lifting component 4, a handheld component 5, a guide tube 6, a rope take-up disc 7, a motor 8, a switching joint 10, a positioning rod 11, a hoisting support 12, a clamping mechanism 14, a positioner bracket 15 and a guide sleeve 16 are arranged.

Detailed Description

The invention is described in further detail below with reference to the figures and the embodiments.

The heat transfer tube inspection positioner mounting tool provided by the invention is divided into a hoisting part 2, a lifting part 4 and a handheld part 5 according to the working principle. The hoisting part 2 is hoisted on the evaporator tube plate 1 through two clamping mechanisms 14, the clamping mechanisms have tensioning and releasing functions and are arranged on the hoisting support 12, as the clamping mechanisms need to be continuously tensioned, the air pipe of the tensioning air passage needs to be hoisted on the hoisting part, and the releasing air passage can be connected through a quick-change connector.

The lifting component 4 is a key component of the installation tool and mainly comprises a pulling device, a steel wire rope 3, a guide pipe 6 and a positioner bracket 15. The locator bracket 15 can support the locating robot, and the pusher comprises a rope take-up disc 7, a motor 8 and an adapter 10. The motor 8 drive of the pusher receives the cable drum 7 and rotates, thereby coil the steel wire rope at receipts cable drum 7, along with wire rope's recovery, because the terminal surface of stand pipe 6 and the terminal surface of adapter link to each other, the stand pipe is the flexible tube and has certain rigidity, the pusher further retrieves wire rope, locator bracket 15 that the stand pipe is connected in another section will be by the propelling movement toward the tube sheet direction, thereby rise the position that is close the tube sheet with positioning robot, uide bushing 16 can overlap on locating lever 11, thereby ensure that positioning robot jack catch can aim at heat-transfer pipe tube hole.

The handheld part 5 is a long rod mechanism, one end of the handheld part is held by an operator, the other end of the handheld part is a quick-change connector, and the operator controls the lifting mechanism to ascend by utilizing the matching of the handheld part and the hoisting mechanism so as to achieve the aim of controlling the balance of the positioner before the positioning rod 11 is sleeved with the guide sleeve 16.

As shown in fig. 1-2, a heat transfer tube inspection locator mounting tool includes a hoisting component 2, a lifting component 4 and a handheld component 5, wherein the hoisting component 2 includes a hoisting support 12, the lower part of the hoisting support 12 is connected with two locating rods 11, and the two locating rods 11 are respectively connected with a steel wire rope 3; lifting means 4 includes locator bracket 15, locator bracket 15 upper portion is provided with two uide bushing 16, wire rope 3 passes uide bushing 16, the sub-unit connection of locator bracket 15 has two stand pipes 6, stand pipe 6 covers at wire rope 3 outsidely, still be connected with handheld part 5 on locator bracket 15, stand pipe 6 is connected with the pulling device, the pulling device is including receiving rope dish 7, motor 8 and adapter 10, two stand pipes 6 are connected with adapter 10 respectively, two adapters 10 are connected with receiving rope dish 7 respectively, two receive rope dish 7 all to be connected with motor 8.

The use mode of the invention is as follows:

firstly, the hoisting part 2 is installed, and the hoisting part 2 is hoisted on the evaporator tube plate 1 through two clamping mechanism tensioning devices 14 by using a long rod tool of a handheld part, so that the hoisting part 2 provides a fixed pivot on the tube plate. After the hoisting tool is installed, the hand-held part is taken down from the hoisting tool by utilizing the pneumatic quick connection on the hoisting tool. And is mounted to the pneumatic snap-on of the locator bracket 15.

Then, installing the maintenance equipment on the positioner bracket 15, starting the quick connector, and locking the maintenance equipment with the installation platform; the motor 8 drive of the ware of pulling out is received the rope dish 7 and is rotated to coil the wire rope and receive rope dish 7, along with wire rope's recovery, the terminal surface of stand pipe 6 and the terminal surface of adapter link to each other, because the stand pipe is the flexbile duct and has certain rigidity, the ware of pulling out further retrieves wire rope, locator bracket 15 that the stand pipe is connected in another section will be by the propelling movement toward the tube sheet direction, when arriving the manhole soon, utilize handheld part to assist and gradually send into the manhole with maintenance equipment. After the maintenance equipment enters the manhole, the pusher continues to move, so that the positioning robot is lifted to a position close to the tube plate, the guide sleeve 16 can be sleeved on the positioning rod 11, and the claw of the positioning robot can be ensured to be aligned to the tube hole of the heat transfer tube. The installation project is careful to ensure the balance state of the locator by the long rod tool of the hand-held component.

Similarly, the maintenance equipment can be removed from the tube sheet and moved out of the manhole by reversing the sequence of actions.

Claims (7)

1. A heat transfer pipe inspection locator mounting tool characterized in that: the lifting device comprises a lifting component, a lifting component and a handheld component.

2. The heat transfer tube inspection positioner installation tool of claim 1, wherein: the hoisting part comprises a hoisting support, the lower part of the hoisting support is connected with two positioning rods, and the two positioning rods are respectively connected with the steel wire rope.

3. The heat transfer tube inspection positioner installation tool of claim 1, wherein: the lifting component comprises a positioner bracket, two guide sleeves are arranged on the upper portion of the positioner bracket, the steel wire rope penetrates through the guide sleeves, two guide pipes are connected to the lower portion of the positioner bracket, and the guide pipes are sleeved outside the steel wire rope.

4. The heat transfer tube inspection positioner installation tool of claim 1, wherein: and the positioner bracket is also connected with a handheld part.

5. The heat transfer tube inspection positioner installation tool of claim 1, wherein: the guide tube is connected with the pushing and pulling device.

6. The heat transfer tube inspection positioner installation tool of claim 5, wherein: the device comprises a wire collecting disc, a motor and an adapter, wherein two guide pipes are connected with the adapter respectively, the two adapters are connected with the wire collecting disc respectively, the two wire collecting discs are connected with the motor respectively, the guide pipes are flexible pipes and have the characteristic of certain rigidity by utilizing the relative motion principle of the wire guide pipes and the wire rope, and the device drives the wire rope so as to drive the wire guide pipes to move towards the pipe plate and achieve the effect of installation and positioning.

7. The heat transfer tube inspection positioner mounting tool according to claim 4, wherein: the handheld part is of a rod-shaped structure.

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