A high-pressure heater manhole cover opening tool for nuclear power plants

Abstract

This invention belongs to the field of nuclear power plant maintenance, specifically relating to a tool for opening manhole covers of high-pressure heaters in nuclear power plants. The tool includes: a rotary connecting unit, a T-shaped flipping operating rod, a manhole cover connector, and a rotating plate. One end of the rotary connecting unit is fixedly connected to a manhole section, and the other end is fixedly connected to one end of the rotating plate. The rotary connecting unit itself can be bent at any angle within a plane. One end of the manhole cover connector is fixedly connected to the manhole cover, and the other end is rotatably connected to the other end of the rotating plate. The T-shaped flipping operating rod is arranged parallel to the rotating plate and fixedly connected to the rotating plate along the operating rod direction. Operating the T-shaped flipping operating rod allows the manhole cover to be flipped. This invention features a lightweight and compact device that is easy to install, reduces industrial safety risks during operation, and improves the efficiency of opening and closing manhole covers for high-pressure heaters.

Description

Technical Field

[0001] This invention belongs to the field of nuclear power plant maintenance, specifically relating to a tool for opening the manhole cover of a high-pressure heater in a nuclear power plant. Background Technology

[0002] The high-pressure heater manhole cover of the Hualong One unit has an elliptical self-sealing structure. It is heavy and the manhole is narrow. The staff cannot disassemble and install it in the same way as the blind plate type manhole cover. They can only disassemble and install the internal manhole cover from the outside by using special tools for disassembling the manhole cover.

[0003] Existing high-pressure heater manhole cover disassembly and assembly tools have disadvantages such as being heavy, bulky, difficult to install, requiring multiple hand-operated hoists, and difficult to operate, requiring multiple people to operate simultaneously. As a result, the disassembly and assembly of manhole covers is time-consuming and labor-intensive, and it is not easy to align them, which can lead to poor installation quality and create hidden dangers for the stable operation of subsequent units.

[0004] Therefore, in order to reduce industrial safety risks and improve the efficiency of opening and closing manhole covers for high-pressure heaters, it is necessary to develop an efficient and convenient tool for opening manhole covers for high-pressure heaters to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a tool for opening the manhole cover of a high-pressure heater in a nuclear power plant. This device is lightweight, small in size, easy to install, can reduce industrial safety risks during operation, and improve the efficiency of opening and closing the manhole cover of the high-pressure heater.

[0006] Technical solution to achieve the purpose of this invention:

[0007] A manhole cover opening tool for a high-pressure heater in a nuclear power plant, comprising: a rotary connecting unit, a T-shaped flipping operating rod, a manhole cover connector, and a rotating plate; one end of the rotary connecting unit is fixedly connected to a manhole cylinder section, and the other end of the rotary connecting unit is fixedly connected to one end of the rotating plate; the rotary connecting unit itself can be bent at any angle in a plane; one end of the manhole cover connector is fixedly connected to a manhole cover, and the other end of the manhole cover connector is rotatably connected to the other end of the rotating plate; the T-shaped flipping operating rod is arranged parallel to the rotating plate and fixedly connected to the rotating plate along the operating rod direction; the manhole cover can be flipped by operating the T-shaped flipping operating rod.

[0008] The tool further includes: a manhole cover connector rotating pin, the other end of the rotating plate is connected to the other end of the manhole cover connector through the manhole cover connector rotating pin, one end of the manhole cover connector rotating pin is fixedly connected to the manhole cover connector, the manhole cover connector rotating pin and the rotating plate are clearance fit, the rotating plate can rotate around the manhole cover connector rotating pin, and the rotation of the manhole cover connector rotating pin drives the manhole cover connector to rotate.

[0009] The tool further includes: a T-shaped rotating operating rod and a connecting rod with a straight groove. One end of the connecting rod with the straight groove is fixedly connected to the other end of the rotating pin of the manhole cover connector. The other end of the connecting rod with the straight groove has a straight groove. The T-shaped rotating operating rod is sleeved inside the T-shaped flipping operating rod and can move linearly within the T-shaped flipping operating rod. The end of the T-shaped rotating operating rod is slidably connected to the connecting rod with the straight groove along the straight groove. When the T-shaped rotating operating rod moves linearly along the straight groove, it can drive the rotating pin of the manhole cover connector to rotate, thereby realizing the rotation of the manhole cover.

[0010] The rotary connection unit includes: a manhole section connector, a horizontal connector, a vertical connector, and a rotary connector; one end of the manhole section connector is fixedly connected to the manhole section; the other end of the manhole section connector is rotatably connected to one end of the horizontal connector; the other end of the horizontal connector is rotatably connected to one end of the vertical connector; the other end of the vertical connector is rotatably connected to one end of the rotary connector; and the other end of the rotary connector is fixedly connected to one end of the rotating plate.

[0011] The rotary connection unit further includes: a horizontal connector rotary pin, a vertical connector rotary pin, and a rotary connector rotary pin; the other end of the manhole cylinder connector is rotatably connected to one end of the horizontal connector via the horizontal connector rotary pin, and the manhole cylinder connector and the horizontal connector can rotate around the horizontal connector rotary pin; the other end of the horizontal connector is rotatably connected to one end of the vertical connector via the vertical connector rotary pin, and the horizontal connector and the vertical connector can rotate around the vertical connector rotary pin; the other end of the vertical connector is rotatably connected to one end of the rotary connector via the rotary connector rotary pin, and the vertical connector and the rotary connector can rotate around the rotary connector rotary pin.

[0012] The tool also includes: manhole section connecting bolts, manhole cover connecting bolts, nuts, and bolts; one end of the manhole section connecting bolt is fixedly connected to the manhole section through the manhole section connecting bolts; one end of the manhole cover connecting bolt is fixedly connected to the manhole cover through the manhole cover connecting bolts; the other end of the rotating connecting bolt is fixedly connected to one end of the rotating plate through the cooperation of nuts and bolts.

[0013] The T-shaped flipping operating lever and the rotating plate are fixedly connected by welding; one end of the rotating pin of the manhole cover connector is fixedly connected to the manhole cover connector by welding, and one end of the connecting rod with the straight groove is fixedly connected to the other end of the rotating pin of the manhole cover connector by welding.

[0014] A handle is fixedly connected to the side of the horizontal connector away from the manhole section.

[0015] The beneficial technical effects of this invention are as follows:

[0016] 1. The manhole cover opening tool for a high-pressure heater in a nuclear power plant provided by this invention is lightweight, small in size, easy to install, and has simple operation steps.

[0017] 2. The manhole cover opening tool for a high-pressure heater in a nuclear power plant provided by this invention can be directly connected to the manhole cylinder section and the manhole cover plate, which can quickly achieve the centering of the manhole cover plate, avoid the problem of the cover plate easily bumping the equipment sealing surface during disassembly and assembly, and improve the stability and reliability of the tool operation.

[0018] 3. The manhole cover opening tool for high-pressure heaters in nuclear power plants provided by this invention can achieve two flips of the cover plate by means of a T-shaped rod, which simplifies the action of pulling out the manhole cover plate. At the same time, the removed manhole cover plate can be placed on one side of the manhole, solving the problem of storage after the cover plate is removed and effectively saving time.

[0019] 4. The manhole cover opening tool for a high-pressure heater in a nuclear power plant provided by this invention can improve on-site work efficiency and reduce industrial safety risks. Attached Figure Description

[0020] Figure 1 This is a top view of a manhole cover opening tool for a high-pressure heater in a nuclear power plant provided by the present invention;

[0021] Figure 2 The right view of a manhole cover opening tool for a high-pressure heater in a nuclear power plant provided by the present invention;

[0022] Figure 3 The left view is of a manhole cover opening tool for a high-pressure heater in a nuclear power plant provided by the present invention.

[0023] Figure 4 A schematic diagram of a manhole cover opening tool for a high-pressure heater in a nuclear power plant, provided by the present invention, showing the manhole cover rotated 90°.

[0024] Figure 5 A schematic diagram of a manhole cover opening tool for a high-pressure heater in a nuclear power plant, provided by the present invention, showing the manhole cover rotated 90°.

[0025] Figure 6 A schematic diagram of a manhole cover opening tool for a high-pressure heater in a nuclear power plant, provided by the present invention, showing the manhole cover stored outside the manhole.

[0026] Figure 7 This is a schematic diagram of the manhole cover connection structure in a manhole cover opening tool for a high-pressure heater in a nuclear power plant provided by the present invention.

[0027] In the diagram: 1-Manhole section connector; 2-Horizontal connector; 3-Vertical connector; 4-Rotary connector; 5-T-shaped flip-up lever; 6-Manhole cover connector; 7-Manhole cover; 8-Rotary pin of horizontal connector; 9-Manhole cover connecting bolt; 10-Rotary pin of manhole cover connector; 11-T-shaped rotary lever; 12-Nut; 13-Bolt; 14-Connecting rod with straight groove; 15-Fixing bolt of manhole section connector; 16-Manhole section; 17-Rotary pin of vertical connector; 18-Rotary pin of rotary connector; 19-Rotary plate. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0029] like Figure 1-7 As shown, the present invention provides a manhole cover opening tool for a high-pressure heater in a nuclear power plant, comprising: a rotary connecting unit, a T-shaped flipping operating rod 5, a manhole cover connector 6, a T-shaped rotary operating rod 11, a connecting rod 14 with a straight groove, a rotating plate 19; a rotating pin 10 for the manhole cover connector, a manhole cover connecting bolt 9, a nut 12, a bolt 13, and a fixing bolt 15 for the manhole cylinder section connector.

[0030] One end of the rotary connecting unit is fixedly connected to the manhole section 16, and the other end of the rotary connecting unit is fixedly connected to one end of the rotating plate 19. The rotary connecting unit itself can be bent at any angle in the plane.

[0031] The rotating connection unit includes: manhole section connector 1, horizontal connector 2, vertical connector 3, rotating connector 4, horizontal connector rotating pin 8, vertical connector rotating pin 17, and rotating connector rotating pin 18. Manhole section connector 1 is directly connected to manhole section 16 via bolts; manhole section connector 1, horizontal connector 2, vertical connector 3, and rotating connector 4 are connected in pairs via pins, and horizontal connector 2, vertical connector 3, rotating connector 4, and manhole cover connector 6 can all rotate around their respective pins; rotating connector 4 is connected to rotating plate 19 via bolts, and rotating plate 19 is connected to manhole cover connector 6 via pins, allowing both rotating plate 19 and manhole cover connector 6 to rotate around their pins; manhole cover connector 6 is connected to manhole cover 7 via screws.

[0032] Specifically, one end of the manhole section connector 1 is fixedly connected to the manhole section 16 by the manhole section connector fixing bolt 15; one end of the manhole cover connector 6 is fixedly connected to the manhole cover 7 by the manhole cover connecting bolt 9.

[0033] The other end of the manhole section connector 1 is rotatably connected to one end of the horizontal connector 2 via a horizontal connector rotating pin 8. The manhole section connector 1 and the horizontal connector 2 can rotate around the horizontal connector rotating pin 8. The other end of the horizontal connector 2 is rotatably connected to one end of the vertical connector 3 via a vertical connector rotating pin 17. The horizontal connector 2 and the vertical connector 3 can rotate around the vertical connector rotating pin 17. The other end of the vertical connector 3 is rotatably connected to one end of the rotating connector 4 via a rotating connector rotating pin 18. The vertical connector 3 and the rotating connector 4 can rotate around the rotating connector rotating pin 18.

[0034] like Figure 1 and Figure 7 As shown, the other end of the rotating connector 4 is fixedly connected to one end of the rotating plate 19 by a nut 12 and a bolt 13; the other end of the rotating plate 19 is connected to the other end of the manhole cover connector 6 by a manhole cover connector rotating pin 10. The lower part of the manhole cover connector rotating pin 10 is fixedly connected to the first protrusion of the manhole cover connector 6 by welding, and the upper part of the manhole cover connector rotating pin 10 is in clearance fit with the manhole cover connector 6 through a connecting hole on the second protrusion. The manhole cover connector rotating pin 10 can rotate within the connecting hole on the second protrusion of the manhole cover connector 6. The middle part of the manhole cover connector rotating pin 10 is in clearance fit with the other end of the rotating plate 19 through a connecting hole at the top of the rotating plate 19. The manhole cover connector rotating pin 10 can rotate within the connecting hole at the top of the rotating plate 19. The rotating plate 19 can rotate around the manhole cover connector rotating pin 10, and the manhole cover connector rotating pin 10 drives the manhole cover connector 6 to rotate.

[0035] The T-shaped flipping operating lever 5 is set parallel to the rotating plate 19 and is fixedly connected to the rotating plate 19 by welding along the direction of the operating lever. By operating the T-shaped flipping operating lever 5, the manhole cover 7 can be flipped 90°.

[0036] One end of the connecting rod 14 with a straight groove is fixedly connected to the other end of the rotating pin 10 of the manhole cover connector by welding. The other end of the connecting rod 14 with a straight groove has a straight groove. The end of the T-shaped rotating operating rod 11 is slidably connected to the connecting rod 14 with a straight groove along the straight groove. When the T-shaped rotating operating rod 11 moves linearly along the straight groove, it can drive the rotating pin 10 of the manhole cover connector to rotate. The rotating pin 10 of the manhole cover connector drives the manhole cover connector 6 to rotate, thereby realizing the rotation of the manhole cover 7.

[0037] A handle is fixedly connected to the side of the horizontal connector 2 away from the manhole section 16 for pulling the manhole cover 7 out of the manhole section 16.

[0038] The removal of a manhole cover using a nuclear power plant high-pressure heater manhole cover opening tool provided by this invention specifically includes the following steps:

[0039] Step 1: Connect and fix the manhole section connector 1 to the manhole section 16 using the manhole section connector fixing bolt 15;

[0040] Step 2: Connect the manhole cover connector 6 to the manhole cover 7 using the manhole cover connecting bolt 9;

[0041] Step 3: Remove the external tensioning block and fixing bolts of manhole cover 7;

[0042] Step 4: Using the T-shaped flipping lever 5, push the manhole cover 7 inward into the equipment to separate the manhole cover 7 from the manhole sealing surface. Figure 1 As shown;

[0043] Step 5: Push the T-shaped rotating operating lever 11 into the manhole. The end of the T-shaped rotating operating lever 11 will rotate the manhole cover 7 by 90°. Figure 4 As shown;

[0044] Step 6: Rotate the T-shaped flip lever 5 to turn the manhole cover 7 to a horizontal position, as shown. Figure 5 As shown;

[0045] Step 7: Use the handle on the horizontal connector 2 and the T-shaped flipping lever 5 to pull the manhole cover 7 out of the manhole section 16;

[0046] Step 8: Rotate the horizontal connector 2 to place the manhole cover 7 outside the manhole, as shown. Figure 6 As shown;

[0047] The steps for installing a manhole cover using the manhole cover opening tool for a high-pressure heater in a nuclear power plant provided by this invention are the reverse operation of removing the manhole cover described above.

[0048] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. All contents not described in detail in the present invention can be derived from existing technologies.

Claims

1. A high pressure heater access hole cover opening tool for a nuclear power plant, characterized by, The tool includes: a rotary connecting unit, a T-shaped flipping operating lever (5), a manhole cover connector (6), a rotating plate (19), a rotating pin (10) for the manhole cover connector, a T-shaped rotary operating lever (11), and a connecting rod (14) with a straight groove; one end of the rotary connecting unit is fixedly connected to the manhole cylinder section (16), and the other end of the rotary connecting unit is fixedly connected to one end of the rotating plate (19); the rotary connecting unit itself can be bent at any angle in the plane; one end of the manhole cover connector (6) is fixedly connected to the manhole cover (7), and the other end of the manhole cover connector (6) rotates to the other end of the rotating plate (19). Connection; the T-shaped flipping operating lever (5) is set parallel to the rotating plate (19) and is fixedly connected to the rotating plate (19) along the direction of the T-shaped flipping operating lever (5); the other end of the rotating plate (19) is connected to the other end of the manhole cover connector (6) through the rotating pin (10) of the manhole cover connector, one end of the rotating pin (10) of the manhole cover connector is fixedly connected to the manhole cover connector (6), the rotating pin (10) of the manhole cover connector is clearance-fitted with the rotating plate (19), the rotating plate (19) can rotate around the rotating pin (10) of the manhole cover connector, and the rotating pin (10) of the manhole cover connector drives the manhole cover to rotate. The manhole cover connector (6) rotates; one end of the connecting rod (14) with a straight groove is fixedly connected to the other end of the rotating pin (10) of the manhole cover connector, and the other end of the connecting rod (14) with a straight groove is provided; the T-shaped rotating operating rod (11) is sleeved inside the T-shaped flip operating rod (5), and the T-shaped rotating operating rod (11) can move linearly inside the T-shaped flip operating rod (5); the end of the T-shaped rotating operating rod (11) is slidably connected to the connecting rod (14) with a straight groove along the straight groove, and when the T-shaped rotating operating rod (11) moves linearly along the straight groove, it can drive the rotating pin (10) of the manhole cover connector. The manhole cover (7) is rotated to achieve rotation; the rotating connection unit includes: manhole section connector (1), horizontal connector (2), vertical connector (3), and rotating connector (4); one end of manhole section connector (1) is fixedly connected to manhole section (16); the other end of manhole section connector (1) is rotatably connected to one end of horizontal connector (2); the other end of horizontal connector (2) is rotatably connected to one end of vertical connector (3); the other end of vertical connector (3) is rotatably connected to one end of rotating connector (4); the other end of rotating connector (4) is fixedly connected to one end of rotating plate (19).

2. A high pressure heater access hole cover opening tool for a nuclear power plant according to claim 1, characterized in that, The rotating connection unit further includes: a horizontal connecting member rotating pin (8), a vertical connecting member rotating pin (17), and a rotating connecting member rotating pin (18); the other end of the manhole cylinder section connector (1) is rotatably connected to one end of the horizontal connecting member (2) through the horizontal connecting member rotating pin (8), and the manhole cylinder section connector (1) and the horizontal connecting member (2) can rotate around the horizontal connecting member rotating pin (8); the other end of the horizontal connecting member (2) is rotatably connected to one end of the vertical connecting member (3) through the vertical connecting member rotating pin (17), and the horizontal connecting member (2) and the vertical connecting member (3) can rotate around the vertical connecting member rotating pin (17); the other end of the vertical connecting member (3) is rotatably connected to one end of the rotating connecting member (4) through the rotating connecting member rotating pin (18), and the vertical connecting member (3) and the rotating connecting member (4) can rotate around the rotating connecting member rotating pin (18).

3. A high pressure heater access hole cover opening tool for a nuclear power plant according to claim 1, characterized in that, The tool also includes: manhole section connector fixing bolt (15), manhole cover connecting bolt (9), nut (12), and bolt (13); one end of manhole section connector (1) is fixedly connected to manhole section (16) through manhole section connector fixing bolt (15); one end of manhole cover connector (6) is fixedly connected to manhole cover (7) through manhole cover connecting bolt (9); the other end of rotating connector (4) is fixedly connected to one end of rotating plate (19) through the cooperation of nut (12) and bolt (13).

4. The opening tool for a high pressure heater access hole cover of a nuclear power plant according to claim 1, characterized in that, The T-shaped flipping operating lever (5) and the rotating plate (19) are fixedly connected by welding; one end of the manhole cover connecting pin (10) is fixedly connected to the manhole cover connecting piece (6) by welding, and one end of the connecting rod (14) with a straight groove is fixedly connected to the other end of the manhole cover connecting pin (10) by welding.

5. The opening tool for a high pressure heater access hole cover of a nuclear power plant according to claim 1, characterized in that, The horizontal connector (2) has a handle fixedly connected to the side away from the manhole section (16).

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