CN108644610B

CN108644610B - Hydraulic detection device inside spherical tank

Info

Publication number: CN108644610B
Application number: CN201810353350.4A
Authority: CN
Inventors: 由宏新; 孙亮; 杨玉玲; 邵珊珊; 刘润杰; 王泽武; 翟亮; 杨俊威
Original assignee: Dalian University of Technology; Hohai University HHU
Current assignee: Dalian University of Technology; Hohai University HHU
Priority date: 2018-04-19
Filing date: 2018-04-19
Publication date: 2020-05-29
Anticipated expiration: 2038-04-19
Also published as: CN108644610A

Abstract

The utility model provides an inside hydraulic pressure type detection device of spherical tank, belongs to special check out test set technical field of industry. The detection device mainly comprises an upper connecting frame, a vertical arm, a swing mechanism for realizing 360-degree rotation around the spherical tank, a horizontal arm, a hydraulic winch for pulling one end of the horizontal arm to ascend and descend, a roller mechanism, a manned basket, a hydraulic station and other accessories. In the whole detection device, the upper end of the upper connecting frame is fixed with the upper manhole of the spherical tank, and the lower end of the upper connecting frame is connected with the vertical arm. The vertical arm and the horizontal arm are connected through a swing mechanism, and both the vertical arm and the horizontal arm can realize synchronous telescopic action of multiple sections of arms. The horizontal arm can drive the revolving mechanism to rotate around the inner part of the spherical tank under the driving of the roller mechanism. The horizontal arm can be lifted and lowered under the traction of the hydraulic winch. Therefore, the manned basket fixed at the front section of the horizontal arm can detect the inner surface of the spherical tank in a large area along with the movement of the horizontal arm. The device utilizes hydraulic control, and simple to operate simplifies traditional spherical tank detection method, has practical meaning.

Description

Hydraulic detection device inside spherical tank

Technical Field

The invention relates to a hydraulic detection device in a spherical tank, and belongs to the technical field of special industrial detection equipment.

Background

The spherical tank is a common pressure container in the chemical industry, is mainly used for storing and transporting liquid steel pressure containers such as liquefied petroleum gas, liquid oxygen, liquid nitrogen and the like or gaseous steel pressure containers such as oxygen, nitrogen and the like, and is widely applied to the petroleum refining industry and the petrochemical industry. Compared with a common storage tank, the spherical tank has the advantages of material saving, small occupied area and the like. But the manufacturing, welding and assembling requirements of the spherical tank are strict, the overhaul task is large, and the manufacturing cost is high.

Since various errors and wear may occur during the manufacturing, installation and use of the pressure vessel, it is necessary to periodically check the pressure vessel. According to the traditional spherical tank detection method, a large number of scaffolds are built in the spherical tank, and inspectors climb on the scaffolds to perform high-altitude operation. This method is not only time consuming but also somewhat dangerous. Therefore, the following points must be noted during the inspection:

1. before the inspection work, the inspection site must be cleaned according to a safety system. For example, the natural gas station can not be started with a mobile phone, can not smoke, and the like.

2. The inspected spherical tank should be isolated from other equipment and marked clearly.

3. The height of the built scaffold is proper, the layer distance is reasonable, the distance between the frame plate and the welding line is proper, and the channel is smooth; when the inspection is not finished, the scaffold is not required to be dismounted randomly; the installed scaffold cannot damage the surface of the spherical tank.

Patent 200920289372.5 discloses a freely movable work platform for inspecting spherical tank. The main body comprises a regular polyhedron truss arranged on the vertical central axis of the spherical tank body, a movable independent working platform, a vertical driving mechanism, a horizontal moving mechanism and a connecting mechanism. Because the detection environment is in an inflammable and explosive place, the electric control system is used, the spark is possibly generated, and potential hazards exist to the detection safety; meanwhile, the main supporting part is large in size and not easy to rapidly and safely disassemble. The working platform can be inspected only within the 120-degree detection range by a single person and has dead angles.

Patent 201020156974.6 discloses a rotating stand for inspection of spherical tank. The support main body is a main stand column, the upper end of the main stand column is hung on a manhole at the top end of a spherical tank through a fixed pore plate horizontally arranged, the lower end of the main stand column supports against a spherical wall around the manhole at the lower end of the spherical tank through supporting bottom feet obliquely arranged, a horizontally rotatable rotary arm connecting seat is arranged on the main stand column at the center of the spherical tank, four-link mechanisms radially extending from the spherical tank are uniformly distributed on the arm connecting seat at intervals, a manned hanging basket is installed at the free end of each four-link mechanism and is close to the wall of the spherical tank, and the upper end of the manned hanging basket is connected with a dry-to-close connecting seat at the upper end of the main stand column through a lifting. The hanging basket is difficult to ensure balance due to the additional horizontal external force of the cable. The mechanism is bulky in structure and inconvenient to install and use, and meanwhile, the arrangement of the mechanism is difficult to enable an operator to operate in any direction.

Patent 201410267973.1 provides a man-carrying device capable of moving in any direction in three dimensions in a spherical tank. The bearings are arranged at the fixed positions of the central column and a steel cable for installing the lifting appliance, so that the device can move conveniently in all directions. Compared with the two patents, the device is designed more thoroughly, but still needs to be installed more in the spherical tank, and the use efficiency is influenced.

Patent 201710358649.4 describes a hydraulic manned device for internal verification of spherical tank inspection. Comprises a vertical column in a spherical tank, a hydraulic telescopic movable arm, a workbench provided with an electric cabinet, a hydraulic station, a vertical column rotating mechanism and a movable arm adjusting mechanism. The device requires too many mechanisms of hydraulic oil. The hydraulic winch comprises a hydraulic turntable, a hydraulic winch, a hydraulic telescopic oil cylinder and four telescopic movable arms.

On the basis of patent 201710358649.4, the invention further optimizes the mechanism, reduces the use of hydraulic oil, and avoids touching and damaging the spherical tank by arranging the telescopic gear of the hydraulic horizontal telescopic arm. Meanwhile, the inconvenience of building a scaffold is solved.

Disclosure of Invention

In consideration of the complexity and the complexity of the traditional spherical tank inspection method, the invention provides the hydraulic detection device in the spherical tank, the manned device is controlled by hydraulic pressure, and the device has the advantages of simple structure, convenience in use, safety, reliability, high working efficiency and the like.

The technical scheme adopted by the invention is as follows: a hydraulic type detection device in a spherical tank comprises an upper connecting frame, a plurality of sections of hydraulically telescopic vertical arms, a swing mechanism, a plurality of sections of hydraulically telescopic horizontal arms, a man-carrying basket, a hydraulic winch and a hydraulic station which are arranged in the spherical tank, and further comprises a roller mechanism arranged at the end part of the horizontal arm, wherein the upper end of the upper connecting frame is connected with an upper manhole of the spherical tank through an upper supporting half flange, and the lower end of the upper connecting frame is connected with the vertical arm through a lower supporting half flange; the lower end of the vertical arm is connected with the swing mechanism; the lower connecting bent plate of the slewing mechanism is hinged with a hydraulic telescopic horizontal arm through a pin shaft; the hydraulic winch is fixedly arranged above the end part of the horizontal arm, one end of a steel wire rope in the hydraulic winch is connected with an ear ring arranged on the outer side of a thrust bearing on the upper connecting frame, and the hydraulic telescopic horizontal arm rotates around the pin shaft in the vertical direction by retracting the length of the steel wire rope; the roller mechanism is arranged at the end part of the hydraulic telescopic horizontal arm and comprises a cycloid motor and a driving wheel, and the cycloid motor drives the driving wheel close to the inner wall of the spherical tank to drive the hydraulic telescopic horizontal arm to rotate in the horizontal direction; the hydraulic station enters the spherical tank from the manhole through a hydraulic oil pipe and is respectively connected with the vertical arm oil cylinder, the horizontal arm oil cylinder and the hydraulic winch.

The upper connecting frame is connected with the upper supporting half flange through bolts, and the tops of the bolts and the upper supporting half flange are fixed in a spot welding mode.

The upper support half flange is connected with the upper manhole of the spherical tank through a double-end stud.

The vertical arm comprises a vertical first-section arm, a vertical second-section arm and a vertical third-section arm, and a vertical arm oil cylinder and a first chain wheel which can realize synchronous extension of the multiple sections of vertical arms are installed in the vertical arm.

The slewing mechanism comprises a thrust bearing, a supporting plate and a lower connecting bent plate, the lower end of the vertical arm, the outer ring of the thrust bearing and the supporting plate are connected through bolts, and the inner ring of the thrust bearing is fixedly connected with the lower connecting bent plate.

The upper end of the lower connecting bent plate is connected with the inner ring of the thrust bearing through a bolt, the lower end of the lower connecting bent plate is connected with a hydraulic telescopic horizontal arm, and the lower connecting bent plate drives the connected horizontal arm to rotate 360 degrees in the spherical tank.

The horizontal arm comprises a horizontal first-section arm, a horizontal second-section arm and a horizontal third-section arm, the horizontal arm is hinged with the lower connecting bent plate through a connecting plate, and a horizontal arm oil cylinder and a second chain wheel which can realize synchronous extension of the plurality of sections of the horizontal arm are installed in the horizontal arm.

The manned basket and the roller mechanism are hinged in the horizontal arm, and the manned basket keeps a vertical state and goes up and down together with one end of the horizontal arm.

The invention has the beneficial effects that: the detection device mainly comprises an upper connecting frame, a vertical arm, a swing mechanism for realizing 360-degree rotation around the spherical tank, a horizontal arm, a hydraulic winch for pulling one end of the horizontal arm to ascend and descend, a roller mechanism, a manned basket, a hydraulic station and other accessories. In the whole detection device, the upper end of the upper connecting frame is fixed with the upper manhole of the spherical tank, and the lower end of the upper connecting frame is connected with the vertical arm. The vertical arm and the horizontal arm are connected through a swing mechanism, and both the vertical arm and the horizontal arm can realize synchronous telescopic action of multiple sections of arms. The horizontal arm can drive the revolving mechanism to rotate around the inner part of the spherical tank under the driving of the roller mechanism. The horizontal arm can be lifted and lowered under the traction of the hydraulic winch. Therefore, the manned basket fixed at the front section of the horizontal arm can detect the inner surface of the spherical tank in a large area along with the movement of the horizontal arm. The device utilizes hydraulic control, and simple to operate simplifies traditional spherical tank detection method, has practical meaning.

Drawings

Fig. 1 is a structural diagram of a three-section arm hydraulic type working platform detection device in a spherical tank.

Fig. 2 is a view showing the detection device lifted up by the horizontal hydraulic telescopic arm.

Fig. 3 is a view showing a horizontal hydraulic telescopic boom descending of the detection device.

Fig. 4 is an enlarged view D in fig. 1.

Fig. 5 is an enlarged view E of fig. 1.

Fig. 6 is an enlarged view of F in fig. 1.

In the figure: 1. the device comprises an upper connecting frame, 2, a thrust bearing, 3, an upper supporting half flange, 4, an earring, 5, a lower supporting half flange, 6, a vertical arm, 6a, a vertical first-section arm, 6B, a vertical second-section arm, 6C, a vertical third-section arm, 6d, a vertical arm oil cylinder, 6e, a first chain wheel, 7, a steel wire rope, 8, a slewing mechanism, 8a, a thrust bearing, 8B, a supporting plate, 8C, a lower connecting bent plate, 8d, a pin shaft, 9, a connecting plate, 10, a horizontal arm, 10a, a horizontal first-section arm, 10B, a horizontal second-section arm, 10C, a horizontal third-section arm, 10d, a horizontal arm oil cylinder, 10e, a second chain wheel, 11, a hydraulic winch, 12, a roller mechanism, 12a, a cycloid motor, 12B, a driving wheel, 13, a manned basket, 14, a hydraulic station, A, a spherical tank, B, a manhole, a lower spherical tank.

Detailed description of the invention

Fig. 1, 4, 5 and 6 show a structure diagram of a three-section arm hydraulic type working platform detection device in a spherical tank. As shown in figure 1, the device mainly comprises an upper connecting frame 1 arranged on a manhole B on a spherical tank, three sections of hydraulic telescopic vertical arms 6, a slewing mechanism 8, three sections of hydraulic telescopic horizontal arms 10, a hydraulic winch 11, a roller mechanism 12, a manned basket 13, a hydraulic station 14 and the like. The upper end of the upper connecting frame 1 is fixed with a manhole B on the spherical tank through an upper supporting half flange 3, and the lower end of the upper connecting frame is connected with the thickest vertical section of arm 6a through a lower supporting half flange 5. The hydraulic telescopic vertical arm 6 comprises three sections of vertical arms, a vertical arm oil cylinder 6d and a first chain wheel 6e are installed in each arm, and the vertical arm oil cylinder 6d is matched with the first chain wheel 6e, so that synchronous telescopic of the three sections of arms can be realized. The lower end of the thinnest vertical three-section arm 6e is connected with a slewing mechanism 8. The swing mechanism 8 comprises a thrust bearing 8a, a support plate 8b and a lower connecting bent plate 8 c. The lower end of the thinnest vertical three-section arm 6e, the thrust bearing outer ring and the support plate 8b are connected through bolts, and the thrust bearing inner ring is fixedly connected with the lower connecting bent plate 8 c. The upper end of the lower connecting bent plate 8c is connected with the inner ring of the thrust bearing through a bolt, and the lower end is connected with a hydraulic telescopic horizontal arm 10. The revolving mechanism 8 drives the hydraulic telescopic horizontal arm 10 connected with the lower end of the revolving mechanism to rotate. A horizontal arm oil cylinder 10d and a second chain wheel 10e are arranged in the three-section hydraulic telescopic horizontal arm 10, and synchronous telescopic can also be realized. The hydraulic winch 11 is installed above the end of the horizontal three-section arm 10c, and one end of the wire rope 7 inside the hydraulic winch 11 is connected to the lug 4 fixed to the upper thrust bearing 2 on the upper connecting frame 1. The roller mechanism 12 is mounted on the foremost end of the horizontal three-joint arm 10 c. The roller mechanism 12 includes a cycloid motor 12a and a drive pulley 12 b. The cycloid motor 12a drives the driving wheel 12b which is close to the inner wall of the spherical tank A to rotate, and the circumferential rotation of the horizontal arm 10 is realized. People carrying basket 13 and roller mechanism 12 are hinged in horizontal three-section arm 10c, so that people carrying basket 13 can lift along with one end of horizontal arm 10, and can keep a vertical state. The hydraulic station 14 provides hydraulic oil for the hydraulic mechanism, and the hydraulic oil enters the spherical tank A from the spherical tank lower manhole C through a hydraulic oil pipe and is respectively connected with the vertical arm oil cylinder 6d, the horizontal arm oil cylinder 10d and the hydraulic winch 11.

Fig. 2 and 3 show the state diagrams of the people carrying basket ascending or descending. When the hydraulic telescopic vertical arm 6 and the hydraulic telescopic horizontal arm 10 extend to proper positions, the hydraulic winch 11 is controlled by the hydraulic station 14 to receive and release the steel wire rope 7, and one end of the hydraulic telescopic horizontal arm 10 can be pulled to lift, so that the manned basket 13 is driven to lift.

The cycloid motor 12a in the roller mechanism 12 is controlled to drive the driving wheel 12b to rotate along the inner wall of the spherical tank A, and simultaneously, the hydraulic telescopic horizontal arm 10 is driven to circularly move by taking the rotary mechanism 8 as a center. Thereby driving the manned basket 13 to rotate 360 degrees in the annular direction in the spherical tank A.

Claims

1. The utility model provides an inside hydraulic pressure type detection device of spherical tank, it is including setting up last link (1), the flexible vertical arm (6) of multisection hydraulic pressure, rotation mechanism (8), the flexible horizontal arm (10) of multisection hydraulic pressure, manned basket (13), hydraulic capstan winch (11) and hydraulic pressure station (14), characterized by in the spherical tank: the device also comprises a roller mechanism (12) arranged at the end part of the horizontal arm (10), the upper end of the upper connecting frame (1) is connected with an upper manhole (B) of the spherical tank through an upper supporting half flange (3), and the lower end of the upper connecting frame is connected with the vertical arm (6) through a lower supporting half flange (5); the lower end of the vertical arm (6) is connected with a swing mechanism (8); a lower connecting bent plate (8 c) of the slewing mechanism (8) is hinged with a hydraulic telescopic horizontal arm (10) through a pin shaft (8 d); the hydraulic winch (11) is fixedly arranged above the end part of the horizontal arm (10), one end of a steel wire rope (7) in the hydraulic winch (11) is connected with an ear ring (4) arranged on the outer side of the thrust bearing (2) on the upper connecting frame (1), and the hydraulic telescopic horizontal arm (10) rotates around a pin shaft (8 d) in the vertical direction by retracting the length of the steel wire rope (7); the roller mechanism (12) is arranged at the end part of the hydraulic telescopic horizontal arm (10), the roller mechanism (12) comprises a cycloid motor (12 a) and a driving wheel (12 b), and the cycloid motor (12 a) drives the driving wheel (12 b) which is close to the inner wall of the spherical tank (A) to drive the hydraulic telescopic horizontal arm (10) to rotate in the horizontal direction; the hydraulic station (14) enters the spherical tank (A) from the lower manhole (C) of the spherical tank through a hydraulic oil pipe and is respectively connected with a vertical arm oil cylinder (6 d), a horizontal arm oil cylinder (10 d) and a hydraulic winch (11).

2. The internal hydraulic pressure type detection device of a spherical tank according to claim 1, characterized in that: the upper connecting frame (1) is connected with the upper supporting half flange (3) through bolts, and the tops of the bolts and the upper supporting half flange (3) are fixed in a spot welding mode.

3. The internal hydraulic pressure type detection device of a spherical tank according to claim 1, characterized in that: the upper support half flange (3) is connected with the upper manhole (B) of the spherical tank through a double-end stud.

4. The internal hydraulic pressure type detection device of a spherical tank according to claim 1, characterized in that: vertical arm (6) contain vertical one section arm (6 a), vertical two section arm (6 b) and vertical three section arm (6 c), install in vertical arm (6) and realize vertical arm hydro-cylinder (6 d) and first sprocket (6 e) that the synchronous flexible of multisection vertical arm.

5. The internal hydraulic pressure type detection device of a spherical tank according to claim 1, characterized in that: the upper end of the lower connecting bent plate (8 c) is connected with the inner ring of the thrust bearing through a bolt, the lower end of the lower connecting bent plate is connected with a hydraulic telescopic horizontal arm (10), and the lower connecting bent plate (8 c) drives the connected horizontal arm (10) to rotate 360 degrees in the spherical tank (A).

6. The internal hydraulic pressure type detection device of a spherical tank according to claim 1, characterized in that: the horizontal arm (10) comprises a horizontal first-section arm (10 a), a horizontal second-section arm (10 b) and a horizontal third-section arm (10 c), the horizontal arm (10) is hinged with a lower connecting bent plate (8 c) through a connecting plate (9), and a horizontal arm oil cylinder (10 d) and a second chain wheel (10 e) which can realize synchronous extension of the multiple sections of the horizontal arm are installed in the horizontal arm (10).

7. The internal hydraulic pressure type detection device of a spherical tank according to claim 1, characterized in that: the manned basket (13) and the roller mechanism (12) are hinged in the horizontal arm (10), and the manned basket (13) keeps a vertical state and is lifted along with one end of the horizontal arm (10).