CN201584175U - Fuel rod positioning trolley - Google Patents

Abstract

This utility model relates to a dedicated maintenance device for fuel assemblies, specifically a fuel rod positioning trolley. It includes a guide rail, frame, upper pulley, lower support wheel, positioning plate, positioning handle, load frame, support frame, horizontal slide rail, fixing nut, handwheel, lead screw, support frame, cylinder, pneumatic control cabinet, air pipe, vertical slide rail, cylinder platform, and upper support wheel. The fuel rod positioning trolley can simultaneously achieve displacement in the X, Y, and Z directions and can be positioned according to the position of the fuel rods. The fuel rod positioning trolley uses an upper and lower pulley structure to prevent tipping, ensuring safety and reliability.

Description

Fuel rod positioning trolley

technical field

The utility model relates to a special maintenance device for fuel assemblies, in particular to a fuel rod positioning trolley.

Background technique

With the operation of nuclear power plants, there will inevitably be a certain breakage rate of fuel assemblies. The fuel assembly damage is often wherein 1 to 2 fuel rods are damaged, if the entire fuel assembly is scrapped, the economic loss is very huge. Therefore, the design of fuel assemblies in various countries in the world adopts a detachable structure, and at the same time, a repair device has been developed to repair the damaged fuel assemblies that have not reached the rated burnup depth and continue to be used in the stack to obtain economic benefits. Daya Bay Nuclear Power Plant, Ling Ao Nuclear Power Plant, Qinshan Phase II and Tianwan Nuclear Power Plant do not have fuel assembly repair devices in China, except Qinshan Phase I, which spent a lot of foreign exchange to import a set of repair devices from Germany. Shanghai Nuclear Engineering Research and Design Institute has designed a fuel assembly repair device for the Qinshan Phase I nuclear power plant. The fuel rod positioning trolley is a key equipment in the fuel assembly repair equipment. The fuel rod positioning trolley can move the grabbed fuel rods so that they can carry out the next maintenance work, thus providing technical support for fuel assembly repair.

Contents of the invention

The purpose of the utility model is to provide a fuel rod positioning trolley which can be used in the maintenance of the fuel assembly in the three directions of X, Y and Z displacement.

The technical solution for realizing the utility model is: a fuel rod positioning trolley, which includes a guide rail, a vehicle frame, an upper pulley, a lower wheel, a positioning plate, a positioning handle, a load frame, a load frame, a horizontal slide rail, a fixing nut, a hand wheel, lead screw, support frame, cylinder, pneumatic control cabinet, air pipe, vertical slide rail, cylinder platform, upper rest wheel; the upper left and right sides of the frame are respectively provided with 2 upper pulleys and 2 upper rest The lower part is provided with a lower wheel, and the frame is set on the guide rail through 2 upper pulleys, 2 upper wheels and 1 lower wheel; on the front of the frame, there are 2 The load frames are respectively provided with horizontal slide rails on the two load frames, and the load frames are worn on the two horizontal slide rails; the load frames are provided with fixing nuts, and the fixed nuts are threaded on the wire On the rod, the tail of the lead screw passes through the frame to connect the hand wheel on the back of the frame; 2 vertical slide rails are arranged at the lower part of the carrier frame, and a support is worn on the 2 vertical slide rails. Frame, the upper part of the vertical slide rail is connected with the bearing frame, and the lower part is connected with the cylinder platform; 2 cylinders are arranged on the cylinder platform, and the cylinders are connected with the pneumatic control cabinet through the air pipe. There are push rods on the 2 cylinders, and the push rods are pushed against the support frame.

The lower idler wheel is connected to the lower idler assembly, and the lower idler assembly is connected to the vehicle frame through the tightening block of the lower idler assembly,

The upper parts of the two load frames are respectively provided with a suspension ring, and one end of the horizontal slide rail is connected to the head of the load frame, and the other end is connected to the vehicle frame.

A positioning plate is provided on the back guide rail on the upper cross bar, and a positioning handle is provided at a corresponding position on the back of the vehicle frame; a scale is provided on one of the load racks, and a A pointer is arranged on the position corresponding to the ruler on the shelf.

The guide rail is covered on three surfaces of the upper cross bar, namely the front, the back and the top, and the guide rail is also covered on the front of the lower cross bar.

The effect of the utility model is that the fuel rod positioning trolley can realize the displacement in three directions of X, Y and Z at the same time. And it can be positioned according to the position of the fuel rod. The fuel rod positioning trolley adopts upper and lower pulley structures to prevent the fuel rod positioning trolley from tipping over, which is safe and reliable. A positioning plate and a ruler are installed on the fuel rod positioning trolley to enable accurate positioning. Due to the special design of the fuel rod positioning trolley, only one operator can complete all functional operations, which is simple and convenient. Most parts of the fuel rod positioning trolley are mechanically connected, which is convenient for disassembly and assembly. At the same time, the pneumatic control cabinet is also designed in the form of a box to make transportation more convenient. The operation of the fuel rod positioning trolley does not require power supply and can work at any time.

Description of drawings

Fig. 1 is a schematic front view of a fuel rod positioning trolley according to the present invention;

Fig. 2 is a schematic diagram of the back side of a fuel rod positioning trolley according to the present invention;

Fig. 3 is the front schematic diagram of vehicle frame;

Figure 4 is a schematic view of the back of the frame;

Figure 5 is a schematic diagram of the load frame;

Fig. 6 is a schematic diagram of the carrier;

Figure 7 is a schematic front view of the support frame;

Figure 8 is a schematic side view of the support frame;

Fig. 9 is a schematic diagram of the railing of the grabber.

In the figure: 1. guide rail; 2. frame; 3. upper pulley; 4. lower wheel; 5. positioning plate; 6. positioning handle; 7. load frame; 8. load frame; 9. horizontal slide rail; 10 , fixed nut; 11, ruler; 12, pointer; 13, hand wheel; 14, lead screw; 15, ring; 16, support frame; 17, cylinder; 18, pneumatic control cabinet; 19, air pipe; 20, pedal control Plate; 21, upper cross bar; 22, lower wheel assembly; 23, lower wheel assembly tightening block; 24, vertical slide rail; 25, cylinder platform; 26, ejector rod; 27, lower cross bar; 28, upper 29, connecting rod; 30, cross bar; 31, horizontal sliding hole; 32, vertical sliding hole; 33, connecting vertical rod; 34, base.

Detailed ways

The fuel rod positioning trolley described in the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, Figure 2 and Figure 9: a fuel rod positioning trolley, which includes a guide rail 1, a vehicle frame 2, an upper pulley 3, a lower wheel 4, a positioning plate 5, a positioning handle 6, a load frame 7, a bearing Frame 8, horizontal slide rail 9, fixed nut 10, handwheel 13, lead screw 14, support frame 16, cylinder 17, pneumatic control cabinet 18, air pipe 19, vertical slide rail 24, cylinder platform 25, upper wheel 28; The grabbing machine railing is a structure in which the upper cross bar 21 and the lower cross bar 27 are connected to the base 34 through the connecting vertical bar 33. The connecting guide rail 1 covers the three faces of the upper cross bar 21, which are respectively the front, the back and the top, and the bottom The front side of the cross bar 27 is also covered with the guide rail 1 .

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4: the vehicle frame 2 is in the shape of a box and has an extension plate on one side, and two upper pulleys 3 and two upper resting wheels are respectively installed on the left and right sides of the upper part 28, 2 upper pulleys 3 can slide on the upper guide rail 1 of the upper cross bar 21, and 2 upper rollers 28 can slide on the back guide rail 1 of the upper cross bar 21. The lower part of the vehicle frame 2 is connected with a lower wheel assembly 22, which is composed of two connecting rods 29 connected to the two ends of a cross bar 30. 29 is connected to the back side of vehicle frame 2, and the back side of wheel assembly stepping block 23 is connected with vehicle frame 2. A lower idler 4 is installed at the middle position of the crossbar 30 of the lower idler assembly 22, and the lower idler 4 can slide on the front guide rail 1 of the lower crossbar 27. A positioning plate 5 is installed on the back guide rail 1 on the upper cross bar 21 , and a positioning handle 6 is installed at a corresponding position on the back side of the vehicle frame 2 .

As shown in Figure 5 and Figure 6: two load frames 7 are erected at the front left and right positions of the vehicle frame 2, and horizontal slide rails 9 are respectively installed on the two load frames 7, and one end of the horizontal slide rail 9 is connected to the load The head of the frame 7 is connected, and the other end is connected on the vehicle frame 2, and the carrier frame 8 is worn on the two horizontal slide rails 9; the carrier frame 8 is a U-shaped plate structure, and each arm of the carrier frame 8 There are 2 horizontal slide holes 31, and 2 horizontal slide rails 9 pass through the slide holes 31 on the two arms of the load frame 8 respectively. A lifting ring 15 is respectively installed on the upper parts of the two load frames 7, and on one side of the load frame 7 A ruler 11 is installed on the support. On the carrier 8 , a pointer 12 is installed at a position corresponding to the scale 11 .

As shown in Fig. 6, Fig. 7 and Fig. 8: bearing frame 8 is equipped with fixing nut 10, and the top of fixing nut 10 is worn on the bearing frame 8, and the bottom of fixing nut 10 is worn on the leading screw 14, and the leading screw 14 The tail passes through the vehicle frame 2 and connects the hand wheel 13 on the back of the vehicle frame 2; two vertical slide rails 24 are installed on the bottom of the carrier frame 8, and a support is worn on the two vertical slide rails 24. Frame 16, the four jiaos of support frame 16 have vertical sliding holes 32, and 2 vertical slide rails 24 on the bearing frame 8 pass through 2 vertical sliding holes 32 on both sides on the support frame 16 respectively.

As shown in Figures 7 and 8: the upper part of the vertical slide rail 24 is connected to the carrier frame 8, and the lower part is connected to the cylinder platform 25; two cylinders 17 are installed in parallel on the cylinder platform 25, and the cylinders 17 pass through Air pipe 19 is connected with pneumatic control cabinet 18 . The push rods 26 on the 2 cylinders 17 bear on the support frame 16. Two pedal control boards 20 are provided in the pneumatic control cabinet 18 .

The fuel rod positioning trolley can be hoisted and erected on the railing of the grabber through the two lifting rings 15 installed on the upper part of the load frame 7, and the vehicle frame 2 can be manually moved, and the fuel rod positioning trolley can be carried out through the positioning plate 5 and the positioning handle 6 Displacement and positioning in the direction to move to a predetermined position above the fuel assembly. Use the hand wheel 13 to move the carrier 8 through the rotation of the lead screw 14, and at the same time, the scale 11 of the load frame 7 and the pointer 12 on the carrier 8 can be used for positioning, so that the fuel rod positioning trolley can be moved and positioned in the Y direction. The pneumatic control cabinet 18 can be used to control the cylinder 17, and the up and down movement of the cylinder 17 can make the support frame 16 move up and down, and the fuel rod positioning trolley can be moved in the Z direction. Provide support for fuel assembly overhaul.

Claims (3)

1. a fuel rod is located dolly, it is characterized in that: it comprises guide rail (1), vehicle frame (2), top sheave (3), following roller (4), location-plate (5), position fixing handle (6), load frame (7), carrier (8), horizontal slide rail (9), hold-down nut (10), handwheel (13), leading screw (14), bracing frame (16), cylinder (17), pneumatic control cabinet (18), tracheae (19), upright slide rail (24), cylinder platform (25), goes up roller (28); The left and right sides, top of described vehicle frame (2) is respectively arranged with 2 top sheaves (3) and 2 last rollers (28), the bottom is provided with 1 following roller (4), and described vehicle frame (2) goes up roller (28) by 2 top sheaves (3), 2 and 1 following roller (4) is erected on the guide rail (1); Set up 2 load frame (7) in the front of described vehicle frame (2), on described 2 load frame (7), be respectively arranged with horizontal slide rail (9), on 2 horizontal slide rails (9), be installed with carrier (8); Described carrier (8) is provided with hold-down nut (10), and described hold-down nut (10) is through on the leading screw (14), and the afterbody of leading screw (14) passes the handwheel (13) that vehicle frame (2) connects vehicle frame (2) back side; Be provided with 2 upright slide rails (24) in the bottom of described carrier (8), be installed with bracing frame (16) on described 2 upright slide rails (24), described upright slide rail (24) top is connected with carrier (8), and the bottom is connected with cylinder platform (25); Described cylinder platform (25) is provided with 2 cylinders (17), and described cylinder (17) is connected with pneumatic control cabinet (18) by tracheae (19), and push rod (26) is arranged on described 2 cylinders (17), and push rod (26) withstands on the bracing frame (16).

2. a kind of fuel rod as claimed in claim 1 location dolly, it is characterized in that: described roller (4) down is connected down on the roller assembly (22), and following roller assembly (22) steps up piece (23) by following roller assembly and is connected on the vehicle frame (2).

3. a kind of fuel rod as claimed in claim 1 location dolly, it is characterized in that: the top of described 2 load frame (7) is respectively arranged with 1 suspension ring (15), one end of described horizontal slide rail (9) is connected with the head of load frame (7), and the other end is connected on the vehicle frame (2).

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