Auxiliary dismounting tool for manhole cover

Abstract

The utility model relates to a manhole cover auxiliary dismounting tool which comprises a connecting base, a connecting rod, a hanging piece and a rotating operation rod, the connecting base is detachably installed on an oval manhole cover, the connecting rod is hinged to the connecting base, the hanging piece is connected to the connecting rod in a locking and sleeving mode in an unlocking mode, and the connecting rod is connected with a heavy block; the rotary operating rod is fixedly connected to one end of the connecting rod away from the connecting seat. The disassembly efficiency can be effectively improved, operation is easy, manpower is saved, and the problem that in the prior art, when an oval manhole cover is placed into a water chamber, impact is too large due to the fact that the falling speed of the oval manhole cover is too high is solved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of disassembly tools, and in particular, to a manhole cover auxiliary disassembly and assembly tool. Background Art

[0002] The water side manhole door of the high-pressure heater of thermal power units above 600MW usually adopts a self-sealing structure due to the high operating pressure (generally higher than 18MPa). With the advancement of technology and the simplification of maintenance processes, modern power plants mostly use horizontal elliptical self-sealing manhole doors. The manhole door needs to be turned when disassembling and assembling. It is easy to fall into the high-pressure heater during operation, damaging the tube bundle or even falling into the pipeline, which brings great difficulty to the maintenance of the high-pressure heater.

[0003] In the related art, the guide ring on the connecting rod can move freely. When the locking device of the oval manhole cover is opened, if the staff does not stabilize the oval manhole cover in time, the oval manhole cover will fall freely. Because the tool limits the oval manhole cover, the oval manhole cover will be pulled after falling to a certain position. The impact force generated will affect the stability of the tool, which is easy to cause the tool to bump and even damage, posing a safety hazard. Utility Model Content

[0004] The purpose of the present invention is to provide a manhole cover auxiliary disassembly and assembly tool, which solves the problem in the prior art that when an elliptical manhole cover is placed in a water chamber, it is easy to cause excessive impact due to its too fast falling speed by changing the relative position of the hanging piece and the connecting rod and then using the gravity assistance of the weight block.

[0005] In order to achieve the above-mentioned purpose, the present disclosure provides a manhole cover auxiliary disassembly and assembly tool, including a connecting seat, a connecting rod, a hanging piece and a rotating operating rod, the connecting seat can be detachably installed on the elliptical manhole cover, the connecting rod is hinged on the connecting seat, the hanging piece is unlockably locked and sleeved on the connecting rod, a weight block is connected to the connecting rod, and the rotating operating rod is fixedly connected to one end of the connecting rod away from the connecting seat.

[0006] Optionally, the connecting seat includes a plate body and two ears fixedly arranged on the plate body, the plate body is fixedly connected to the elliptical manhole cover, and the two ears are hinged to the connecting rod through a rotating shaft.

[0007] Optionally, the plate body and the ear piece are welded.

[0008] Optionally, the hanger includes a sleeve slidably mounted on the connecting rod and a pull ear connected to the side wall of the sleeve, the sleeve is provided with a notch extending along its own axial direction, and two connecting plates connected to the sleeve are provided on opposite sides of the notch with respect to the axial direction, and the two connecting plates are connected by a locking member.

[0009] Optionally, the locking member includes a locking bolt and a locking nut, and the locking bolt passes through the two connecting plates and is connected to the locking nut.

[0010] Optionally, the pull ear extends along the axial direction of the sleeve, and the pull ear and the notch are arranged symmetrically about a center line of the sleeve.

[0011] Optionally, limiting holes are provided on the two connecting plates, and the hanger also includes a limiting rod passing through the two limiting holes on the two connecting plates, and limiting parts are provided at both ends of the limiting rod to limit the two connecting plates between the two limiting parts.

[0012] Optionally, the connecting piece, the sleeve and the pull ear are an integrally formed structure.

[0013] Optionally, a threading hole is provided on the pull ear.

[0014] Optionally, the weight is detachably connected to the connecting rod via a pull rope.

[0015] Through the above technical scheme, the connecting seat is structurally detachably installed on the elliptical manhole cover, the connecting seat is hinged to the connecting rod, and then the hanging piece is unlockably locked on the connecting rod. When the elliptical manhole cover is disassembled and assembled, the relative position of the hanging piece is adjusted according to the force change of the elliptical manhole cover to reduce manpower output. When the elliptical manhole cover is pushed into the water chamber, it is necessary to adjust the direction of the elliptical manhole cover by rotating the rotating operating rod. In order to prevent the problem of uncertain flipping direction of the elliptical manhole cover in the water chamber, a weight block is detachably connected to the connecting rod. The flipping direction of the elliptical manhole cover is guaranteed by the gravity of the weight block, thereby increasing the stability of the operation.

[0016] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0018] Figure 1 is a schematic diagram of the overall structure of a manhole cover auxiliary disassembly and assembly tool provided in an exemplary embodiment of the present disclosure;

[0019] Figure 2 is a schematic diagram of the overall structure of a hanging member provided in an exemplary embodiment of the present disclosure;

[0020] Figure 3 is a cross-sectional view of a hanger provided in an exemplary embodiment of the present disclosure.

[0021] Description of Reference Numerals

[0022] 1. Oval manhole cover; 2. Connecting seat; 3. Connecting rod; 4. Hanging piece; 5. Rotating operating lever; 6. Pull ear; 7. Threading hole; 8. Notch; 9. Connecting piece; 10. Locking bolt; 11. Locking nut; 12. Limiting hole; 13. Limiting rod; 14. Limiting part; 15. Weight block; 17. Sleeve; 21. Plate; 22. Ear. DETAILED DESCRIPTION

[0023] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0024] In the present disclosure, unless otherwise stated, the directional words used, such as "upper" and "lower", are usually defined according to the indicated direction of the drawings in the accompanying drawings, rather than indicating or implying that the device or element referred to must have a specific orientation, and a specific orientation structure and operation, and therefore cannot be understood as a limitation on the present disclosure. "Inside" and "outside" refer to the inside and outside of the corresponding component contours. In addition, when the following description refers to the drawings, unless otherwise indicated, the same numbers in the drawings represent the same or similar elements.

[0025] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "connected", and "installed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0026] according to Figures 1 to 3 As shown, the present disclosure provides a manhole cover auxiliary disassembly tool for disassembling an elliptical manhole cover 1, referring to Figure 1As shown, it includes a connecting seat 2, a connecting rod 3, a hanging piece 4 and a rotating operating rod 5. The connecting seat 2 is detachably mounted on the oval manhole cover 1 so that tools can be easily removed from or installed on the oval manhole cover 1. The connecting rod 3 is hinged on the connecting seat 2 to facilitate the flipping of the oval manhole cover 1. The hanging piece 4 is unlockably locked and sleeved on the connecting rod 3. By adjusting the relative position of the hanging piece 4 and the connecting rod 3, manpower consumption can be saved when disassembling and assembling the oval manhole cover 1. It is worth noting that the unlockable locking method mentioned here means that the hanging piece 4 can be positioned on the connecting rod 3 and slide on the connecting rod 3 through its own structure, and the sliding is a continuous and controllable sliding process. In addition, a weight block 15 is connected to the connecting rod 3. When disassembling the oval manhole cover 1, the weight block 15 is placed on one side of the oval manhole cover 1, so that the oval manhole cover 1 is subjected to uneven force, and the oval manhole cover 1 can automatically flip toward the weight block 15 side, avoiding the problem that the oval manhole cover 1 is placed in the water chamber and its flipping direction is uncertain, which affects the smoothness of operation. In this process, it is also necessary to adjust the rotating operating rod 5, which is fixedly arranged at one end of the connecting rod 3 away from the connecting seat 2, and the rotating operating rod 5 is used to rotate the oval manhole cover 1 located in the water chamber.

[0027] In some embodiments, the connection seat 2 includes a plate body 21 and two ear pieces 22 fixedly arranged on the plate body 21. The plate body 21 and the ear pieces 22 are welded. A threaded hole is provided on the elliptical manhole cover 1, and a through hole is provided on the plate body 21. A bolt is inserted in the through hole, and the bolt is screwed into the threaded hole, thereby realizing the detachable installation of the connection seat 2. A rotating shaft is rotatably provided between the two ear pieces 22, and a mounting hole is provided at the end of the connecting rod 3. The rotating shaft is inserted in the mounting hole, thereby realizing the hinge connection of the connecting rod 3.

[0028] In some embodiments, the weight 15 is detachably connected to the connecting rod by a pull rope, for example, one end of the pull rope is connected to the weight 15, and the other end is connected to the connecting rod, so as to ensure that the disassembly and assembly of the weight 15 is more flexible and controllable. In other embodiments, the weight 15 can also be embedded in the connecting rod, which is not specifically limited in the present disclosure.

[0029] In some embodiments, Figure 2 and Figure 3As shown, the hanger 4 includes a sleeve 17 slidably sleeved on the connecting rod and a pull ear 6 connected to the side wall of the sleeve 17, the pull ear 6 extends along the axial direction of the sleeve 17, and the sleeve 17 is provided with a notch 8 extending along its own axial direction. The pull ear 6 and the notch 8 are symmetrically arranged about the center line of the sleeve 17 so that the force on the hanger can be balanced. During lifting, it is more conducive to the sliding of the hanger 4 on the connecting rod 3. Two connecting pieces 9 connected to the sleeve 17 are provided on opposite sides of the notch 8 about the axial direction. The two connecting pieces 9 are connected by a locking piece. By locking the two connecting pieces 9 by the locking piece, the gap of the notch 8 can be reduced so that the sleeve 17 is fastened to the connecting rod. By loosening the two connecting pieces 9 by the locking piece, the gap of the notch 8 can be enlarged so that the sleeve 17 can slide on the connecting rod. The two connecting pieces 9 are provided with limiting holes 12, and limiting rods 13 are inserted into the limiting holes 12. Limiting parts 14 are provided at both ends of the limiting rods 13. The connecting piece 9 is limited between the two limiting parts 14. By adding limiting holes 12 and limiting rods 13, the gap of the notch 8 can be limited to prevent the connecting rod 3 from opening the notch 8 and falling from the hanging piece 4. It is worth noting that the connecting piece 9, the sleeve 17 and the pull ear 6 are an integrally formed structure, which is easy to manufacture. A threading hole 7 is provided on the pull ear 6. When hoisting, the hoisting rope is passed through the pull ear 6, and the other end of the hoisting rope is fixed on an external object, so that the oval manhole cover 1 can be suspended. Then, according to the actual situation, the hoisting height is adjusted to lift the connecting rod 3 to a suitable position to disassemble the oval manhole cover 1. Among them, the locking part includes a locking bolt 10 and a locking nut 11. The locking bolt 10 passes through the two connecting plates 9 and is connected to the locking nut 11. Through the detachable structure of the bolt and nut, when the hanger 4 is installed on the connecting rod 3, the locking nut 11 is adjusted to move the hanger 4, which is conducive to the disassembly of the elliptical manhole cover 1.

[0030] When the tool is installed on the oval manhole cover 1, the hanging piece 4 is located at one end of the connecting rod 3 close to the connecting seat 2, and the locking bolt 10 is screwed into the locking nut 11 so that the sleeve 17 is relatively fixed on the connecting rod. When the oval manhole cover 1 is loosened from the hole and needs to be moved into the water chamber, the locking nut 11 is rotated to release the limit of the notch 8. At this time, the connecting rod 3 will move downward together with the oval manhole cover 1 under the gravity of the oval manhole cover 1, and the position of the hanging piece 4 remains unchanged, but the notch 8 on the hanging piece 4 will be enlarged. With the continuous rotation of the locking nut 11, the connecting rod 3 and the oval manhole cover 1 will continue to move downward until the oval manhole cover 1 falls to make it completely flipped, and the locking nut 11 is stopped. At this time, the oval manhole cover 1 can be rotated. After the oval manhole cover 1 is rotated 90°, the hoisting rope is operated to take the oval manhole cover 1 out of the water chamber.

[0031] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0032] It should also be noted that the various specific technical features described in the above specific implementation methods can be combined in any suitable manner without contradiction.

[0033] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A manhole cover auxiliary disassembly and assembly tool, characterized in that: It includes a connecting seat, a connecting rod, a hanging piece and a rotating operating rod. The connecting seat can be detachably installed on the elliptical manhole cover, the connecting rod is hinged on the connecting seat, the hanging piece is unlockably locked and sleeved on the connecting rod, a weight is connected to the connecting rod, and the rotating operating rod is fixedly connected to one end of the connecting rod away from the connecting seat.

2. The manhole cover auxiliary disassembly and assembly tool according to claim 1, characterized in that: The connecting seat comprises a plate body and two ears fixedly arranged on the plate body. The plate body is fixedly connected to the elliptical manhole cover, and the two ears are hinged to the connecting rod through a rotating shaft.

3. The manhole cover auxiliary disassembly and assembly tool according to claim 2, characterized in that: The plate body is welded to the ear piece.

4. The manhole cover auxiliary disassembly and assembly tool according to claim 1, characterized in that: The hanger includes a sleeve slidably mounted on the connecting rod and a pull ear connected to the side wall of the sleeve. The sleeve is provided with a notch extending along its own axial direction. Two connecting plates connected to the sleeve are provided on opposite sides of the notch with respect to the axial direction. The two connecting plates are connected by a locking member.

5. The manhole cover auxiliary disassembly and assembly tool according to claim 4, characterized in that: The locking member comprises a locking bolt and a locking nut, and the locking bolt passes through the two connecting plates and is connected to the locking nut.

6. The manhole cover auxiliary disassembly and assembly tool according to claim 4, characterized in that: The pull ear extends along the axial direction of the sleeve, and the pull ear and the notch are symmetrically arranged about the center line of the sleeve.

7. The manhole cover auxiliary disassembly and assembly tool according to claim 4, characterized in that: The two connecting plates are both provided with limiting holes, and the hanging piece also includes a limiting rod passing through the two limiting holes on the two connecting plates, and limiting parts are provided at both ends of the limiting rod to limit the two connecting plates between the two limiting parts.

8. The manhole cover auxiliary disassembly and assembly tool according to claim 4, characterized in that: The connecting piece, the sleeve and the pull ear are an integrally formed structure.

9. The manhole cover auxiliary disassembly and assembly tool according to claim 4, characterized in that: The pull ear is provided with a threading hole.

10. The manhole cover auxiliary disassembly and assembly tool according to claim 1, characterized in that: The weight block is detachably connected to the connecting rod via a pull rope.

Images