Electrified flaw detection device for porcelain post insulator

Abstract

The invention relates to the technical field of power transmission lines, in particular to a porcelain post insulator live flaw detection device. The flaw detection probe is driven by the linear driving mechanism to move towards the porcelain post insulator, so that the porcelain post insulator is sleeved with the first arc-shaped plate, the second arc-shaped plate and the arc-shaped mounting plate, the limiting mechanism is attached to the outer side of the porcelain post insulator for limiting, and it is determined that the second arc-shaped plate, the arc-shaped mounting plate and the porcelain post insulator are concentric; the driving mechanism drives the arc-shaped mounting plate and the flaw detection probe to rotate around the porcelain post insulator to detect the peripheral side of the porcelain post insulator, so that the peripheral side of the porcelain post insulator can be conveniently detected under the conditions that the flaw detection device does not move and the porcelain post insulator is electrified, and the detection efficiency of the porcelain post insulator is improved; and loss caused by power failure detection is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission lines. Background Art

[0002] As the main body of support and insulation for various electrical equipment, post insulators have to bear the effects of conductor tension, wind force, and short-circuit current electromotive force during long-term operation. These forces act vertically on the axis of the post insulator, causing bending loads. For post porcelain insulators used in disconnectors, since the contacts are often opened and closed in a rotating manner, the porcelain posts are also subject to torsional torque. In addition, there are also reasons such as unreasonable design, inadequate installation and maintenance. Post porcelain insulators in operation are very prone to brittle fracture accidents, causing partial or even full power outages in substations and power supply lines, and even serious consequences such as equipment damage and casualties.

[0003] For a long time, my country's power companies have mainly used preventive tests and other periodic test methods to detect high-voltage pillar porcelain insulators. However, preventive tests need to be carried out in a power outage state. If the power outage cycle is not properly arranged, a large number of insulators will operate in a critical limit state or even an over-limit state. At the same time, regular or irregular power outages for maintenance will cause losses to the national economy. Summary of the invention

[0004] In order to solve the technical problem in the prior art that insulators need to be inspected in a power-off state, the present invention provides a live flaw detection device for porcelain post insulators.

[0005] The technical solution adopted by the present invention to achieve the above-mentioned purpose is:

[0006] A live flaw detection device for porcelain post insulators, a limit detection mechanism is installed on a linear drive mechanism 6, the linear drive mechanism 6 is used to drive the limit detection mechanism to move horizontally, the limit detection mechanism includes a limit assembly and a detection assembly, the limit assembly is installed on the drive mechanism 6, the detection assembly is installed on the upper side of the limit assembly, the detection assembly includes a second connecting plate 704, an arc-shaped mounting plate 706, a drive mechanism 707, an arc-shaped follower 711 and a flaw detection probe 708, the second connecting plate 704 is installed on the upper side of the limit mechanism, the end of the second connecting plate 704 is provided with a second arc plate 705, the inner side of the second arc plate 705 is provided with An arc groove 710, an arc follower 711 is arranged in the arc groove 710, an arc mounting plate 706 is arranged on the inner side of the second arc plate 705, the arc mounting plate 706 is connected to the arc follower 711, the flaw detection probe 708 is installed on the inner side of the arc mounting plate 706, an arc opening 712 is provided on the outer side of the second arc plate 705, a driving mechanism 707 is installed on the outer side of the second arc plate 705, the driving mechanism 707 and the arc follower 711 are installed in cooperation with each other through the arc opening 712, and the driving mechanism is used to drive the arc follower 711 to slide along the arc groove 710 and rotate relative to the second arc plate 705.

[0007] The limiting assembly includes a first connecting plate 701 and a limiting mechanism 703, the second connecting plate 704 is installed on the upper side of the first connecting plate 701, the linear drive mechanism 6 is installed on the lower side of the first connecting plate 701, the end of the first connecting plate 701 is provided with a first curved plate 702, the second curved plate 705 is coaxially arranged with the first curved plate 702, and the limiting mechanism 703 is installed on the inner side of the first curved plate 702.

[0008] The first arc plate 702, the second arc plate 705, the arc follower 711 and the arc mounting plate 706 are major arcs.

[0009] The arc-shaped follower 711 is an arc-shaped rack, and the driving mechanism 707 includes a servo motor 7071 and a gear 7072. The servo motor 7071 is installed on the outside of the second arc-shaped plate 705. The gear 7072 is connected to the servo motor 7071. The teeth of the gear 7072 are located in the arc-shaped opening 712 and mesh with the arc-shaped rack.

[0010] The number of the limiting mechanisms is greater than two. The limiting mechanism 703 includes an electric push rod 7031 and an arc-shaped limiting plate 7032 . The electric push rod 7031 is installed on the inner side of the first arc-shaped plate 702 , and the arc-shaped limiting plate 7032 is connected to the electric push rod 7031 .

[0011] The linear drive mechanism 6 includes a shell 601, a drive motor 603 and a threaded pull rod 604. A T-shaped guide groove 605 is provided in the shell 602. The drive motor 603 is installed on the shell 601. The threaded pull rod 604 is installed in the T-shaped guide groove 605 through a bearing seat 606. The threaded pull rod 604 is connected to the drive motor 603. A sliding bar 602 is installed on the threaded pull rod 604, and a first connecting plate 701 is installed on the sliding bar 602.

[0012] It also includes a support frame 5 and a scissor-type electric lifting frame 2 , wherein the linear drive mechanism 6 is installed on the support frame 5 , and the scissor-type electric lifting frame 2 is installed on the lower side of the support frame 5 .

[0013] The bottom of the scissor lift 2 is provided with a moving wheel 3 .

[0014] A spacer plate 709 is disposed between the first connecting plate 701 and the second connecting plate 704 .

[0015] There are two servo motors 7071 , which are symmetrically installed on the outer side of the second arc-shaped plate 705 , and the two servo motors 7071 rotate in the same direction.

[0016] The advantages of the present invention compared with the prior art are:

[0017] The linear drive mechanism drives the flaw detection probe to move toward the porcelain post insulator, so that the first arc plate, the second arc plate and the arc mounting plate are sleeved on the outside of the porcelain post insulator, and the limiting mechanism is used to fit with the outside of the porcelain post insulator to limit the second arc plate, the arc mounting plate and the porcelain post insulator to ensure that they are concentric; the driving mechanism drives the arc mounting plate and the flaw detection probe to rotate around the porcelain post insulator to detect the surrounding side of the porcelain post insulator, which is convenient for detecting the surrounding side of the porcelain post insulator when the flaw detection device does not move and the porcelain post insulator is energized, thereby improving the detection efficiency of the porcelain post insulator and avoiding losses caused by power outage detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a three-dimensional structural schematic diagram of a live flaw detection device for a porcelain post insulator.

[0019] Figure 2 The present invention is a schematic diagram of the structure of a flaw detection mechanism of a live flaw detection device for a porcelain post insulator.

[0020] Figure 3 The present invention is a schematic diagram of the structure of a linear drive mechanism of a live flaw detection device for porcelain post insulators.

[0021] Figure 4 The present invention is a schematic diagram of the structure of a driving mechanism of a live flaw detection device for porcelain post insulators.

[0022] Figure 5 The present invention is a schematic diagram of the structure of a limiting mechanism of a live flaw detection device for a porcelain post insulator.

[0023] In the figure: 1. porcelain pillar insulator; 2. scissor-type electric lifting frame; 3. moving wheel; 4. pillar; 5. support frame; 6. linear drive mechanism; 601. shell; 602. sliding bar; 603. driving motor; 604. threaded pull rod; 605. T-shaped guide groove; 606. bearing seat; 607. bearing; 7. flaw detection mechanism; 701. first connecting plate; 702. first arc plate; 703. limiting mechanism; 7031. electric push rod; 7032. arc-shaped limiting plate; 704. second connecting plate; 705. second arc plate; 706. arc-shaped mounting plate; 707. driving mechanism; 7071. servo motor; 7072. gear; 708. flaw detection probe; 709. spacer plate; 710. arc-shaped groove; 711. arc-shaped follower; 712. opening. DETAILED DESCRIPTION

[0024] The present invention provides a live flaw detection device for porcelain post insulators, such as Figure 1 As shown, a moving wheel 3 is installed at the bottom of the scissor lift 2, a support frame 5 is installed on the scissor lift 2, and the support frame 5 is composed of a support column 4 and a support platform. A linear drive mechanism 6 is installed on the support platform. Figure 3 As shown, the linear drive mechanism 6 includes a shell 601, a drive motor 603 and a threaded rod 604. A T-shaped guide groove 605 is provided in the shell 602. The drive motor 603 is installed on the shell 601. The threaded rod 604 is installed on the bearing seat 606 through a bearing 607. The bearing seat 606 is installed in the T-shaped guide groove 605. The threaded rod 604 is connected to the drive motor 603. A sliding bar 602 is installed on the threaded rod 604. The drive motor 603 drives the threaded rod 604 to rotate, and then the sliding bar 602 moves along the threaded rod 604 through threaded cooperation.

[0025] like Figure 2 and Figure 4As shown, a first connecting plate 701 is installed on the sliding bar 602 of the linear drive mechanism 6, a first arc plate 702 is provided at one end of the first connecting plate 701, two limiting mechanisms 703 are symmetrically installed on the inner side of the first arc plate 702, a spacer plate 709 is installed on the upper side of the first connecting plate 701, a second connecting plate 704 is installed on the upper side of the spacer plate 709, an end of the second connecting plate 704 is located above the first arc plate 702 and a second arc plate 705 is provided, the second arc plate 705 is coaxially arranged with the first arc plate 702, an arc groove 710 is provided on the inner side of the second arc plate 705, an arc follower 711 is provided in the arc groove 710, and an arc follower 711 is provided on the inner side of the second arc plate 705 The arc-shaped mounting plate 706 is connected with the arc-shaped follower 711. The first arc-shaped plate 702, the second arc-shaped plate 705, the arc-shaped follower 711 and the arc-shaped mounting plate 706 are optimal arcs, which facilitates the arc-shaped mounting plate 706 to rotate in the second arc-shaped plate 705 and prevents the arc-shaped mounting plate 706 from rotating out of the second arc-shaped plate 705. The flaw detection probe 708 is installed on the inner side of the arc-shaped mounting plate 706. The outer side of the second arc-shaped plate 705 is provided with an arc-shaped opening 712, and the arc-shaped opening 712 is connected with the arc-shaped groove 710. The driving mechanism 707 is installed on the outer side of the second arc-shaped plate 705, and the driving mechanism 707 and the arc-shaped follower 711 are installed in coordination with the arc-shaped opening 712. The arc-shaped follower 711 is an arc-shaped rack. The driving mechanism 707 includes a servo motor 7071 and a gear 7072. There are two servo motors 7071, which are symmetrically installed on the outside of the second arc-shaped plate 705. By setting two servo motors 7071, the stability of the operation of the arc-shaped follower 711 can be improved, and stronger power can be provided. The gear 7072 is connected to the servo motor 7071. The teeth of the gear 7072 are located in the arc-shaped opening 712 and mesh with the arc-shaped rack. The two servo motors 7071 rotate in the same direction and at the same speed, thereby driving the gear 7072 to rotate, and then the arc-shaped follower 711 is rotated through the meshing of the gear 7072 and the arc-shaped rack. The arc-shaped follower 711 can also be made of a component with large friction on the outside. The servo motor 7071 is connected to a roller, and the surface of the roller is also made of a material with large friction. The roller fits the arc-shaped follower, so that the servo motor 7071 drives the arc-shaped follower 711 to rotate. Figure 5 As shown, there are two limit mechanisms 703 which are symmetrically installed on the inner side of the second arc plate 705. The limit mechanism 703 includes an electric push rod 7031 and an arc limit plate 7032. The electric push rod 7031 is installed on the inner side of the second arc plate 705. The arc limit plate 7032 is connected to the electric push rod 7031. The electric push rod 7031 drives the arc limit plate 7032 to clamp the porcelain support insulator to achieve the limiting effect.

[0026] The present application provides a porcelain post insulator live flaw detection device which includes the following steps during operation:

[0027] Step 1, moving the live flaw detection device for porcelain post insulators to the side of porcelain post insulators 1 via moving wheels 3;

[0028] Step 2, the linear drive mechanism 6 drives the flaw detection mechanism 7 to move toward the porcelain post insulator 1, and the drive motor 603 drives the threaded pull rod 604 to drive the sliding bar 602 to slide in the T-shaped guide groove 605, thereby driving the flaw detection mechanism 7 to slide, so that the first curved plate 702, the second curved plate 705, and the curved mounting plate 706 in the flaw detection mechanism 7 are sleeved on the porcelain post insulator 1. Before the flaw detection mechanism 7 moves, the opening directions of the first curved plate 702, the second curved plate 705, and the curved mounting plate 706 face the porcelain post insulator 1;

[0029] Step 3, the electric push rod 7031 drives the arc-shaped limit plate 7032 to fit the outer side of the porcelain post insulator 1, and ensures that the second arc-shaped plate 705 and the arc-shaped mounting plate 706 are concentric with the porcelain post insulator 1;

[0030] Step 4, the driving mechanism 707 drives the arc-shaped mounting plate 706 and the flaw detection probe 708 to rotate around the porcelain post insulator 1, and the two servo motors 7071 are started at the same time and rotate in the same direction and speed. The servo motor 7071 drives the gear 7072 to drive the arc-shaped rack 711, the arc-shaped mounting plate 706, and the flaw detection probe 708 to rotate around the porcelain post insulator 1 to detect the circumference of the porcelain post insulator 1;

[0031] Step 5, the scissor-type electric lifting frame 2 drives the flaw detection mechanism 7 to move up and down, so that the flaw detection mechanism 7 detects different heights of the detection area of ​​the porcelain post insulator 1, and the flaw detection probe 708 transmits and processes the data, thereby realizing the test of whether there are cracks in the porcelain post insulator 1. The internal stress of the porcelain post insulator 1 can be detected online in real time to determine whether there are defects, providing a new reference method for detecting the deterioration of the porcelain post insulator 1, which is easy to use, simple to process, low cost, and suitable for a variety of occasions.

[0032] The present invention is described by way of embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the protection scope of the present invention.

Claims

1. A live flaw detection device for porcelain post insulators, characterized in that: A limit detection mechanism is installed on the linear drive mechanism (6), the linear drive mechanism (6) is used to drive the limit detection mechanism to move horizontally, the limit detection mechanism comprises a limit assembly and a detection assembly, the limit assembly is installed on the drive mechanism (6), the detection assembly is installed on the upper side of the limit assembly, the detection assembly comprises a second connecting plate (704), an arc-shaped mounting plate (706), a drive mechanism (707), an arc-shaped follower (711) and a flaw detection probe (708), the second connecting plate (704) is installed on the upper side of the limit mechanism, a second arc-shaped plate (705) is provided at the end of the second connecting plate (704), an arc-shaped groove (710) is provided on the inner side of the second arc-shaped plate (705), and the arc-shaped follower (711) is arranged in the arc groove (710), the arc mounting plate (706) is arranged on the inner side of the second arc plate (705), the arc mounting plate (706) is connected to the arc follower (711), the flaw detection probe (708) is installed on the inner side of the arc mounting plate (706), the outer side of the second arc plate (705) is provided with an arc opening (712), the driving mechanism (707) is installed on the outer side of the second arc plate (705), the driving mechanism (707) and the arc follower (711) are installed in cooperation with each other through the arc opening (712), and the driving mechanism is used to drive the arc follower (711) to slide along the arc groove (710) and rotate relative to the second arc plate (705).

2. A live flaw detection device for porcelain post insulators according to claim 1, characterized in that: The limiting assembly comprises a first connecting plate (701) and a limiting mechanism (703); the second connecting plate (704) is mounted on the upper side of the first connecting plate (701); the linear drive mechanism (6) is mounted on the lower side of the first connecting plate (701); a first curved plate (702) is provided at the end of the first connecting plate (701); the second curved plate (705) is coaxially arranged with the first curved plate (702); and the limiting mechanism (703) is mounted on the inner side of the first curved plate (702).

3. A live flaw detection device for porcelain post insulators according to claim 2, characterized in that: The first arc-shaped plate (702), the second arc-shaped plate (705), the arc-shaped follower (711) and the arc-shaped mounting plate (706) are major arcs.

4. The live flaw detection device for porcelain post insulators according to claim 1 is characterized in that: The arc-shaped follower (711) is an arc-shaped rack. The driving mechanism (707) comprises a servo motor (7071) and a gear (7072). The servo motor (7071) is mounted on the outside of the second arc-shaped plate (705). The gear (7072) is connected to the servo motor (7071). The teeth of the gear (7072) are located in the arc-shaped opening (712) and mesh with the arc-shaped rack.

5. The live flaw detection device for porcelain post insulators according to claim 2 is characterized in that: The number of the limiting mechanisms is greater than two, and the limiting mechanism (703) comprises an electric push rod (7031) and an arc-shaped limiting plate (7032), the electric push rod (7031) is installed on the inner side of the first arc-shaped plate (702), and the arc-shaped limiting plate (7032) is connected to the electric push rod (7031).

6. The live flaw detection device for porcelain post insulators according to claim 1 is characterized in that: The linear drive mechanism (6) comprises a housing (601), a driving motor (603) and a threaded pull rod (604); a T-shaped guide groove (605) is provided in the housing (602); the driving motor (603) is mounted on the housing (601); the threaded pull rod (604) is mounted in the T-shaped guide groove (605) via a bearing seat (606); the threaded pull rod (604) is connected to the driving motor (603); a sliding bar (602) is mounted on the threaded pull rod (604); and a first connecting plate (701) is mounted on the sliding bar (602).

7. The live flaw detection device for porcelain post insulators according to claim 1 is characterized in that: It also includes a support frame (5) and a scissor-type electric lifting frame (2), wherein the linear drive mechanism (6) is mounted on the support frame (5), and the scissor-type electric lifting frame (2) is mounted on the lower side of the support frame (5).

8. The live flaw detection device for porcelain post insulators according to claim 7 is characterized in that: Moving wheels (3) are installed at the bottom of the scissor-type electric lifting frame (2).

9. The live flaw detection device for porcelain post insulators according to claim 2 is characterized in that: A spacer plate (709) is provided between the first connecting plate (701) and the second connecting plate (704).

10. The live flaw detection device for porcelain post insulators according to claim 4, characterized in that: The number of the servo motors (7071) is two, and they are symmetrically mounted on the outside of the second arc-shaped plate (705), and the two servo motors (7071) rotate in the same direction.

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