CN219380575U

CN219380575U - Special tool for opening and closing inner open manhole door

Info

Publication number: CN219380575U
Application number: CN202223451767.5U
Authority: CN
Inventors: 李松; 陈林; 熊自强; 杨伟国; 李铖; 嘎玛欧珠
Original assignee: Dagu Hydropower Branch Of Huadian Tibet Energy Co ltd
Current assignee: Dagu Hydropower Branch Of Huadian Tibet Energy Co ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-07-21
Anticipated expiration: 2032-12-23

Abstract

The utility model discloses a special tool for opening and closing an inward opening manhole door, which comprises the following concrete steps: two ends of a connecting plate with a circular ring in the middle are connected with the inner rings of the movable universal bearing, and are locked by locking pins, and the outer rings of the movable universal bearing are welded with mounting bolts; the hydraulic telescopic rod of the double-cylinder hydraulic cylinder penetrates from the ring in the middle of the connecting plate, a round hole is formed in the end part of the hydraulic telescopic rod, and the cylinder body of the double-cylinder hydraulic cylinder is arranged on the ring of the connecting plate through 4 fixing bolts; two oil supply and discharge ports of the double-cylinder hydraulic cylinder are respectively connected with a manual hydraulic pump through oil pipes. The utility model can eliminate the risk of mechanical injury and ensure the equipment to be intact; the power requirements of opening and closing in two directions are met, and the device is convenient, quick, safe and reliable; the disassembly and the assembly are convenient, and the time and the labor are saved; the novel plastic composite material has the characteristics of simple components, low material cost, convenience in manufacturing and purchasing, long service life and the like.

Description

Special tool for opening and closing inner open manhole door

Technical Field

The utility model belongs to mechanical tools, and particularly relates to a special tool for opening and closing an inward opening manhole door.

Background

In order to improve the intrinsic safety level of the equipment, an inward opening type pressure-bearing device is a mainstream configuration. Most of the hydropower station volute manhole doors, large-sized pressure-bearing pipelines and containers are designed and installed as 'hinged' inward-opening doors.

However, the traditional door opening mode adopts a mode of opening and closing a manhole door by using a jackscrew, so that the safety requirement of personnel entering and exiting cannot be met, meanwhile, great damage exists to a sealing groove of a door leaf of the manhole door in the opening process, no fixed supporting point exists after the manhole door is opened, the risk coefficient of opening and closing the door is high, the difficulty coefficient is large, and the time consumption is long.

Disclosure of Invention

In order to solve the difficulty in actual work, a set of special tools and instruments are designed for opening and closing the pressure-bearing cover plate. The utility model provides a special tool for opening and closing an inward opening manhole door.

The utility model discloses a special tool for opening and closing an inward opening manhole door, which specifically comprises the following steps: the two ends of the connecting plate with the circular ring in the middle are connected with the inner rings of the movable universal bearing, and are locked by using locking pins, and the outer rings of the movable universal bearing are welded with mounting bolts. The hydraulic telescopic rod of the double-cylinder hydraulic cylinder penetrates from the ring in the middle of the connecting plate, a round hole is formed in the end part of the hydraulic telescopic rod, and the cylinder body of the double-cylinder hydraulic cylinder is arranged on the ring of the connecting plate through 4 fixing bolts; two oil supply and discharge ports of the double-cylinder hydraulic cylinder are respectively connected with a manual hydraulic pump through oil pipes.

Further, a switching handle is arranged on the manual hydraulic pump.

And universal bearings are welded at positions corresponding to the ends of the manhole door and the hydraulic telescopic rod, and the universal bearings can be connected with round holes at the ends of the hydraulic telescopic rod through pins.

Further, the fixing bolt model is M16.

The beneficial technical effects of the utility model are as follows:

the utility model is designed based on the principle that the triangle has stability, and meanwhile, the movable universal bearing is adopted to change the stress direction, so that the effect of flexibility and variability is achieved, the risk of mechanical injury is eliminated, and the equipment is ensured to be intact. And secondly, the double-cylinder hydraulic manual oil pump is utilized to output power, and the oil way is changed by switching the handle, so that the power requirements of opening and closing two directions are met, and the double-cylinder hydraulic manual oil pump is convenient, quick, safe and reliable. Thirdly, all connectors adopt detachable self-locking hydraulic connectors, so that the disassembly, the assembly and the installation are convenient, and the time and the labor are saved. Fourth, the tool has the characteristics of simple components, low material cost, convenient manufacture and purchase, long service life and the like.

Drawings

Fig. 1 is a schematic diagram of a special tool for opening and closing an inward opening manhole door.

Fig. 2 is a schematic diagram of the installation and use of the tool special for opening and closing the inner open manhole door.

Detailed Description

The utility model will be described in further detail with reference to the accompanying drawings and the detailed description.

The utility model discloses a special tool for opening and closing an inward opening manhole door, which is shown in figure 1, and specifically comprises the following steps: the two ends of the connecting plate 4 with the circular ring in the middle are connected with the inner ring of the movable universal bearing 6, and are locked by using the locking pin 1, and the outer ring of the movable universal bearing 6 is welded with the mounting bolt 2. The hydraulic telescopic rod 3 of the double-cylinder hydraulic cylinder penetrates from a circular ring in the middle of the connecting plate 4, a circular hole is formed in the end part of the hydraulic telescopic rod 3, and a cylinder body 10 of the double-cylinder hydraulic cylinder is arranged on the circular ring of the connecting plate 4 through 4M 16 fixing bolts 5; the two oil supply and discharge ports of the double-cylinder hydraulic cylinder are respectively connected with a manual hydraulic pump 9 through an oil pipe 7.

Further, a switching handle 8 is arranged on the manual hydraulic pump 9 and is used for changing an oil way so as to achieve the power requirements of opening and closing two directions.

And universal bearings are welded at positions corresponding to the ends of the manhole door and the hydraulic telescopic rod 3, and the universal bearings can be connected with round holes at the ends of the hydraulic telescopic rod 3 through pins.

The utility model relates to an installation process of a special tool for an inward opening manhole door switch.

(1) Two movable universal bearings 6 are mounted at corresponding bolt holes on the manhole door.

(2) The connecting plate is threaded into two movable universal bearings 6 and locked with locking pins 1.

(3) The hydraulic telescopic rod 3 of the double-cylinder hydraulic cylinder penetrates through a circular ring in the middle of the connecting plate 4, and the cylinder body 10 of the double-cylinder hydraulic cylinder is connected with the connecting plate 4 by using 4M 16 fixing bolts 5.

(4) The universal bearing is connected with the round hole at the end part of the hydraulic telescopic rod 3 through a pin, and is fixed on a manhole, so that the universal bearing is firmly welded (the universal bearing is not taken down after the first welding and is permanently used).

(5) The two oil supply and discharge ports of the double-cylinder hydraulic cylinder are respectively connected with a manual hydraulic pump 9 through an oil pipe 7, and the installation effect is shown in figure 2.

The utility model relates to an operation flow of a special tool for opening and closing an inward opening manhole door.

(1) Before operation, the parts are confirmed to be free from damage, and the welding seams are free from cracks.

(2) And confirming that all connecting bolts of the manhole door are completely removed.

(3) Confirm the surrounding things that do not affect the operation.

(4) The tool assembly is completed and the handle switch 8 is switched to the required oil supply and drain port.

(5) Filling oil into the double-cylinder hydraulic cylinder by using the manual hydraulic pump 9, and extending or shortening the hydraulic telescopic rod 3 to open or close the manhole door after a certain pressure is reached;

(6) The double-cylinder hydraulic cylinder, the connecting plate 4 and the movable universal bearing can rotate along with the opening or closing angle change of the manhole door;

(7) And stopping oil delivery to the double-cylinder hydraulic cylinder when the opening degree or the total closing degree of the manhole door meets the requirement.

(8) And (5) after the operation is finished, removing the tool.

The two modes of opening and closing the manhole door of the 1 unit volute of the DG hydropower station are used for one time to perform effect comparison, and the working hours of maintenance can be saved by about 15.32 hours, so that the construction period of a maintenance main line is shortened by 0.64 days.

The utility model is not only suitable for hydropower stations, but also suitable for all internal-opening type large-diameter pressure-bearing pipelines and containers with loose leaves which are difficult to open and close and have inclined angles.

Claims

1. The special tool for opening and closing the inner open manhole door is characterized in that two ends of a connecting plate (4) with a circular ring in the middle are connected with the inner rings of a movable universal bearing (6) and locked by using a locking pin (1), and the outer rings of the movable universal bearing (6) are welded with a mounting bolt (2); the hydraulic telescopic rod (3) of the double-cylinder hydraulic cylinder penetrates from a circular ring in the middle of the connecting plate (4), a circular hole is formed in the end part of the hydraulic telescopic rod (3), and a cylinder body (10) of the double-cylinder hydraulic cylinder is arranged on the circular ring of the connecting plate (4) through 4 fixing bolts (5); two oil supply and discharge ports of the double-cylinder hydraulic cylinder are respectively connected with a manual hydraulic pump (9) through oil pipes (7).

2. The tool for opening and closing the inner open manhole door according to claim 1, wherein a switching handle (8) is arranged on the manual hydraulic pump (9).

3. The special tool for opening and closing the inward opening type manhole door according to claim 1, wherein a universal bearing is welded at a position corresponding to the end part of the manhole door and the hydraulic telescopic rod (3), and the universal bearing can be connected with a round hole at the end part of the hydraulic telescopic rod (3) through a pin.

4. The tool for opening and closing an inward opening manhole door according to claim 1, wherein the fixing bolt (5) is M16.