CN111766031B - Vibration excitation head for vibration acoustic detection in power industry - Google Patents
Vibration excitation head for vibration acoustic detection in power industry Download PDFInfo
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- CN111766031B CN111766031B CN202010650411.0A CN202010650411A CN111766031B CN 111766031 B CN111766031 B CN 111766031B CN 202010650411 A CN202010650411 A CN 202010650411A CN 111766031 B CN111766031 B CN 111766031B
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N29/04—Analysing solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
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Abstract
The invention provides an excitation head for detecting vibration acoustics in the power industry, which is arranged on the outer wall of a flange of a post insulator in a surrounding way through two rotatable and clamped semi-clamping rings, so that the vibration amplitude of the post insulator is prevented from being influenced by the arrangement of the excitation head; the semi-clamping ring is matched with the sliding block through a sliding rail, and can be connected with a plurality of connecting blocks in a sliding manner, and the connecting blocks can respectively and annularly slide along the inner side of the semi-clamping ring; each connecting block is provided with a storage groove for placing a launching ball to be launched; the launching balls are ejected out of the storage groove through the trigger mechanism and collide with the outer wall of the flange, so that the post insulator vibrates; the connecting block is provided with a receiving groove for receiving the launching ball rebounded through the outer wall of the flange. The collision of each launching ball to the post insulator is single, so that the influence of secondary or multiple collisions on the vibration of the post insulator is avoided; set up a plurality of connecting blocks simultaneously in the semi-snap ring, play shooting ball respectively and can realize the multiple spot collision to post insulator, increase the application range of excitation head.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to an excitation head for vibro-acoustic detection in the power industry.
Background
The post insulator is a special insulating control and can play an important role in an overhead transmission line. The on-site post insulator vibro-acoustic detection equipment with more domestic applications is mainly a portable vibro-acoustic detector, and a vibration excitation head, a vibration signal acquisition head, a signal processing circuit and the like are integrated, but the existing excitation head has the following defects when in use:
1. when the existing excitation head is used, the device is arranged on the side wall of the flange, so that the whole vibration amplitude of the post insulator can be influenced due to the self weight of the excitation head;
2. after the collision head collides with the flange at present, the rebound of the collision head after collision can generate secondary or even multiple collisions with the vibrating post insulator, thus causing errors on the detection of the vibration effect;
3. the excitation head in the prior art can only realize the collision of a single point, so that the application range of the excitation head is influenced.
Disclosure of Invention
The invention provides an excitation head for vibro-acoustic detection in the power industry, aiming at solving the problems in the prior art.
In order to achieve the above object, an aspect of the present invention is to provide an excitation head for vibroacoustic detection, including: two half-snap rings arranged oppositely, surrounding the outer wall of the flange of the post insulator;
the connecting blocks are respectively connected with the semi-clamping rings in a sliding manner and can annularly slide along the inner sides of the semi-clamping rings;
each connecting block, comprising:
the storage tank is used for placing the launching balls to be launched;
the triggering mechanism is used for ejecting the launching balls out of the storage groove; the popped launching ball collides with the outer wall of the flange, so that the post insulator vibrates;
and the receiving groove is used for receiving the launching ball rebounded through the outer wall of the flange.
Optionally, a stopper is fixedly connected in the storage groove, and the launching ball to be launched is placed on the front side of the stopper; a conduction opening is formed in the stop block;
the trigger mechanism comprises a sliding block which is connected with the inner wall of the storage groove in a sliding manner, and the sliding block is positioned behind the stop block; the sliding block is provided with a guide rod corresponding to the conduction port;
the sliding block can slide to a position that the guide rod penetrates through the conduction opening to push the launching ball;
one end of the storage groove is provided with a first opening communicated with the front surface of the connecting block, the first opening faces the outer wall of the flange, and the launching ball pushed by the guide rod is ejected out of the storage groove through the first opening.
Optionally, each connecting block is provided with a first movable groove; the other end of the storage groove is communicated to the front side of the first movable groove through the penetrating groove;
the trigger mechanism further comprises:
the pushing block is connected with the inner wall of the first movable groove in a sliding mode;
the two ends of the first connecting rod are respectively and rotatably connected with the first surface of the pushing block and the sliding block; the first connecting rod can move in the through groove;
one end of the second connecting rod is connected with the second surface of the pushing block, and the other end of the second connecting rod penetrates through a second opening formed in the connecting block and is connected with a first handle positioned outside the connecting block;
when the pushing block slides in the first movable groove along the first direction, the sliding block is driven by the first connecting rod to move forwards in the storage groove, and the guide rod can penetrate through the conduction opening to push the launching ball; or, under the drive of the first handle, when the pushing block slides in the first movable groove along the second direction, the sliding block is driven by the first connecting rod to move backwards in the storage groove, so that the guide rod is separated from the conduction opening of the stop block; the first direction of the pushing block sliding in the first movable groove is opposite to the second direction.
Optionally, an adjusting block and an adjusting mechanism are arranged outside the connecting block;
the adjusting block is sleeved on the outer wall of the second connecting rod in a sliding manner; the adjusting block is connected with the corresponding position on the connecting block through an adjusting mechanism; a first return spring is sleeved on the outer wall of the second connecting rod and positioned between the second surface of the pushing block and the adjusting block; the corresponding location on the connector block comprises a connector block surface adjacent the second opening;
the adjusting mechanism comprises a screw rod which is rotatably connected to the adjusting block and provided with a handle disc, a thread groove matched with the screw rod is formed in the corresponding position on the connecting block, and the distance between the adjusting block and the connecting block can be adjusted through the adjusting mechanism.
Optionally, an inner groove is formed in the rear side of the inner wall of the first movable groove, and a limit block is connected in the inner groove in a sliding manner; the limiting block can slide along the front-back direction and is vertical to the sliding direction of the pushing block in the first movable groove;
the inner groove is also connected with an installation block in a sliding manner, and the sliding direction of the installation block is consistent with the sliding direction of the pushing block in the first movable groove; a third connecting rod is arranged in the inner groove, and two ends of the third connecting rod are respectively and rotatably connected with the mounting block and the limiting block;
when the mounting block slides along the first direction, the limiting block is driven to move forwards through the third connecting rod, so that at least the front end of the limiting block enters the first movable groove; when the second surface of the limiting block contacts the first surface of the pushing block, the limiting block limits the pushing block;
or when the pushing block slides along the second direction, the limiting block is pushed by the pushing block during the period from the contact of the second surface of the pushing block to the separation of the first surface of the pushing block and the second surface of the limiting block, and the limiting block moves backwards and retreats into the inner groove, so that the pushing block can continuously slide along the second direction; along with the backward movement of the limiting block, the mounting block is driven to slide towards the second direction through the third connecting rod.
Optionally, the first surface of the stopper is an inclined surface.
Optionally, each connecting block is provided with a second movable groove; the first movable groove is communicated with the second movable groove through a first channel; the inner wall of the second movable groove is connected with a transition block in a sliding manner, and the transition block can slide back and forth; a second return spring is arranged between the front end of the transition block and the front end of the second movable groove;
the mounting block is also fixedly connected with one end of the fourth connecting rod; the other end of the fourth connecting rod penetrates through the first channel, extends into the second movable groove and is in contact with the front end of the transition block; the rear end of the second movable groove is provided with a third opening communicated to the rear surface of the connecting block, and the rear end of the transition block extends to the outside of the connecting block from the third opening;
the half clamping ring is provided with a second channel, and one end of the second channel is provided with a fourth opening communicated with the outside of the half clamping ring; the half insert block penetrates through the second channel, and one end of the half insert block extends to the outside of the half clamp ring from the fourth opening and is in contact with the rear end of the transition block;
when the half insertion block slides along the first direction, the transition block is pushed to move forwards, and then the mounting block is driven to slide along the second direction through the movement of the fourth connecting rod; or, under the action of the second return spring, when the transition block moves backwards, the fourth connecting rod moves to drive the mounting block to slide along the first direction, and the half insertion block is pushed to slide along the second direction along with the backward movement of the transition block.
Optionally, the other end of the second channel of the half snap ring is provided with a fifth opening communicated with the outside of the half snap ring; the other end of the half insertion block extends to the outside of the half clamping ring from the fifth opening, and the other end of the half insertion block is fixedly connected with a handle block; a third return spring is sleeved on the outer wall of the half insertion block and is positioned between the handle block and the surface of the half clamping ring near the fifth opening;
the half insertion block is driven to slide along a first direction by the handle block; or the half insert block slides along the second direction under the action of a third return spring.
Optionally, the rear end of the transition block is a bevel, and the end of the half insert block contacting with the transition block is a bevel matched with the half insert block. Optionally, the front end of the transition block is a slope, and the end of the fourth link is in contact with the slope of the front end of the transition block.
Optionally, the receiving groove is provided with an inlet communicated with the front surface of the connecting block; the launching balls rebounded through the outer wall of the flange enter the containing groove through the inlet.
Optionally, the receiving groove is provided with a buffered sand body.
Alternatively, the inlet is tapered, that is, the front opening of the inlet communicating with the front surface of the connecting block is larger than the rear opening of the inlet communicating with the receiving groove.
Optionally, at least two opposite side walls of the inlet opening are arranged obliquely, one oblique side wall of the inlet opening coinciding with the direction of inclination of the storage trough.
Optionally, the rear side wall of the accommodating groove is obliquely arranged; the rear side wall is a side wall of the receiving groove opposite to the rear opening of the inlet.
Optionally, one end of each of the two half clamping rings is rotatably connected, and the other ends of the two half clamping rings are separated from each other or connected through a clamping mechanism; after the two half clamping rings are arranged on the outer wall of the flange of the post insulator in a surrounding mode, the two half clamping rings are connected through a clamping mechanism;
the clamping mechanism comprises two fixing blocks which are oppositely arranged and respectively connected to the radial outer side surfaces of the other ends of the two half clamping rings; wherein, the first fixed block is connected with the fixed end of the arc-shaped rod; the second fixed block is provided with a socket matched with the insertion end of the arc-shaped rod, and is also radially provided with a third channel communicated with the socket;
a bolt is connected in the third channel in a sliding manner, and the arc-shaped rod is provided with a limit port matched with the bolt; when connecting two half snap rings through latch mechanism, the inserting end of arc pole inserts the socket, and the bolt tip inserts spacing mouthful, realizes spacing to the arc pole.
Optionally, the end of the bolt is an inclined surface facing the position of the first fixed block; the inserting end of the arc-shaped rod is provided with an inclined plane which is opposite to the inclined plane at the end part of the bolt;
optionally, the latch is provided with a handle located outside the outer surface of the second fixed block.
Optionally, the part of the bolt, which is left outside the outer surface of the second fixed block, is sleeved with a return spring.
Optionally, the inner side of the half clamping ring is provided with a sliding groove and a sliding block to be matched with the connecting block, so that annular sliding and position adjustment of the connecting block are realized.
The excitation head for the vibro-acoustic detection has the beneficial effects that:
1. through two semi-snap rings of rotatable and joint, set up this device on the bottom outer wall of ring flange, can not be because of the distribution of this device on the flange outer wall, to post insulator's vibration range production influence.
2. The half insertion block moves downwards by pressing the handle block, so that the transition block moves forwards, the ejector rod drives the limiting block to move backwards, and the elastic potential energy of the first return spring acts on the launching ball through the sliding block and the guide rod to eject the launching ball outwards; the launching balls which are popped out outwards collide with the outer wall of the flange plate and then enter the accommodating groove, and the collision process realized by each launching ball is single, so that the problem that the vibration of the post insulator is influenced by the traditional secondary or multiple collisions is solved;
3. this device passes through the cooperation of slider with the spout, can set up a plurality of connecting blocks simultaneously in the semi-snap ring, and rotatable angle, like this through pressing the handle piece, can outwards jet out the transmission ball in a plurality of connecting blocks, realizes the multiple spot collision, increases its application range.
Drawings
Fig. 1 is a schematic structural diagram of an excitation head for vibro-acoustic detection in the power industry according to the present invention;
FIGS. 2 and 4 are views A-A in FIG. 1, and FIG. 3 is an enlarged view of B in FIG. 2;
fig. 2 and 4 correspond to a non-launched state and a launched state of the launching ball, respectively.
Detailed Description
Referring to fig. 1 to 4, an excitation head for vibro-acoustic detection in the power industry comprises two semi-clamping rings 1; one end of each of the two half snap rings 1 is rotatably connected, and the other ends of the two half snap rings 1 can be separated from each other or connected through a clamping mechanism.
Further, as shown in fig. 1 in detail, the clamping mechanism includes two fixing blocks 31 fixedly connected to the outer sides of the corresponding ends of the two half-clasps 1: the first fixed block 31 is fixedly connected with one end (fixed end) of an arc-shaped rod 32; the second fixing block 31 is provided with a socket matched with the arc rod 32, the arc rod 32 and the socket are arranged along the circumferential direction, and the other end (insertion end) of the arc rod 32 can be inserted into the socket.
A channel radially arranged in the second fixed block 31 and communicated with the socket; a bolt 33 is connected in the channel in a sliding way, and the bolt 33 is provided with a handle; the arc-shaped rod 32 is provided with a limit opening matched with the bolt 33; the end part of the bolt 33 which slides along the channel in the radial direction can be inserted into the limit opening of the arc-shaped rod 32 to limit the arc-shaped rod 32; the handle of the bolt 33 is left outside the second fixing block 31.
After the two semi-clamping rings 1 encircle the outer wall of the flange of the post insulator, the connection of the corresponding end parts of the two semi-clamping rings 1 is realized through a clamping mechanism, so that the bolt 33 is inserted into a limiting hole of the arc-shaped rod 32, and the arc-shaped rod 32 is prevented from being separated from the socket.
The inserting end of the arc-shaped rod 32 and the end of the bolt 33 are both obliquely arranged, the inclined plane of the end of the bolt 33 faces the position of the first fixing block 31, and the inclined plane of the arc-shaped rod 32 is opposite to the inclined plane of the bolt 33, so that the inserting end of the arc-shaped rod 32 can eject the bolt 33 outwards when just entering the inserting opening; along with the arc-shaped rod 32 is further inserted, the position of the limit opening corresponds to the position of the bolt 33, and then the bolt 33 is inserted into the limit opening to limit the arc-shaped rod 32. In order to prevent the pin 33 from falling off, a return spring may be sleeved on a portion of the pin 33 that is left outside the second fixing block 31.
Referring to fig. 1 and 2, a plurality of connecting blocks 2 are annularly and slidably connected in the semi-clamping ring 1. The sliding block 34 is matched with the sliding groove, so that the annular sliding of the connecting block 2 can be realized, and further the position adjustment of the connecting block 2 is realized; through the slip of a plurality of connecting blocks 2, be convenient for realize the collision of many places different positions to the flange lateral wall, increase the application range of device. Can set up connecting block 2 respectively at two semi-snap rings 1, also can make the spout intercommunication of two semi-snap rings 1 and let connecting block 2 can remove different semi-snap rings 1 department.
In the connecting block 2, a storage groove 3, a storage groove 4, a first movable groove 5 and a second movable groove 6 are formed. According to the directional illustration of fig. 2, the left side corresponds to the side of fig. 1 which is radially close to the axial center of the semi-snap ring 1, and is hereinafter referred to as the "front" side; the right side corresponds to the side of fig. 1 that is radially away from the axial center of the semi-snap ring 1, and is hereinafter referred to as the "rear" side.
Wherein, the accommodating groove 3 is provided with an inlet 8 which is radially communicated with the front side surface of the connecting block 2; of the four side walls of the inlet 8, at least a first side wall, which coincides with the direction of inclination of the storage tank 4, and a second side wall, which is opposite thereto, are arranged obliquely so that the opening of the inlet 8 is gradually reduced (i.e., a front-side opening, which is away from one end of the storage tank 3, is smaller than a rear-side opening, which communicates with one end of the storage tank 3):
the first and second side walls of the inlet 8 are inclined from the front side to the rear side in opposite directions (the first side wall is located above and inclined downward in fig. 2; the second side wall is located below and inclined upward). The rear side wall of the receiving groove 3 away from one end of the inlet 8 is obliquely arranged. Since at least the first and second sidewalls of the inlet 8 are obliquely disposed, the launching balls 11 are facilitated to enter into the receiving grooves 3; as the side wall at the rear side of the accommodating groove 3 is obliquely arranged, the launching ball 11 is prevented from being popped out after colliding with the inner wall of the accommodating groove 3. The accommodating groove 3 is also internally provided with a sand body 7 for buffering.
Wherein the storage tank 4 is obliquely arranged in accordance with the inclination direction of the first sidewall of the inlet 8 (shown as being obliquely downward); a stop block 9 is fixedly connected in the storage groove 4, and the front side of the storage groove is used for placing a launching ball 11; a conduction opening 10 is arranged at the stop block 9; the inner wall of the storage groove 4 is connected with a sliding block 12 in a sliding way, and the sliding block is positioned behind the stop block 9; and a guide rod 13 corresponding to the conduction opening 10 is fixed to the slide block 12. The storage tank 4 has an opening communicated to the front surface of the connector block 2 at one end and a front side communicated to the first movable tank 5 through the penetration groove 20 at the other end.
A pushing block 14 is connected to the inner wall of the first movable groove 5 (vertically arranged in the figure) in a sliding manner, the pushing block 14 is connected with the sliding block 12 through a first connecting rod 15, two ends of the first connecting rod 15 are respectively connected with a first surface (bottom surface in the figure) of the pushing block 14 and the sliding block 12 in a rotating manner, and the first connecting rod 15 can move in the through groove 20; the second surface (shown as the top surface) of the pushing block 14 is connected with a handle 17 through a second connecting rod 16, the outer wall of the second connecting rod 16 is slidably sleeved with an adjusting block 18, the adjusting block 18 is further connected with the connecting block 2 through an adjusting mechanism, the outer wall of the second connecting rod 16 is sleeved with a first return spring 19, and two ends of the first return spring 19 are fixedly connected with the second surface of the pushing block 14 and the adjusting block 18 respectively.
Furthermore, the adjusting mechanism comprises a screw rod 35 which is rotatably connected to the adjusting block 18 and is provided with a handle disc, a thread groove matched with the screw rod 35 is formed in the corresponding position on the connecting block 2, the adjusting block 18 can be moved through the adjusting mechanism, and the distance between the adjusting block 18 and the connecting block 2 is adjusted; that is, as the screw 35 is screwed in and out of the threaded groove, the adjusting block 18 which is rotatably connected with the screw is driven to move, so that when the second surface of the limiting block 24 is limited by the first surface of the pushing block 14, the elastic potential energy stored by the first return spring 19 can be adjusted.
Wherein, as shown in fig. 3 in detail, an inner groove 23 is formed at the rear side of the inner wall of the first movable groove 5, the stopper 24 is connected in the inner groove 23 in a sliding manner, and a first surface (shown as a bottom surface) of the stopper 24 is inclined; the sliding direction (shown as horizontal) of the stopper 24 is substantially perpendicular to the direction of the first movable groove 5; a mounting block 25 is connected in the inner groove 23 in a sliding manner, and the sliding direction (shown as vertical) of the mounting block 25 is basically consistent with the direction of the first movable groove 5; the mounting block 25 is connected with the limiting block 24 through a third connecting rod 26, two ends of the third connecting rod 26 are respectively connected with the mounting block 25 and the limiting block 24 in a rotating manner, and the mounting block 25 is also fixedly connected to one end of a fourth connecting rod 27; a channel is arranged in the connecting block 2 to communicate the inner groove 23 with the second movable groove 6, and the other end of the fourth connecting rod 27 penetrates through the channel and extends into the second movable groove 6.
The inner wall of the second movable groove 6 (horizontally arranged in the figure) is connected with a transition block 21 in a sliding mode, and the sliding direction (horizontally arranged in the figure) of the transition block 21 is basically consistent with that of the limiting block 24; the front end of the transition block 21 is connected to the front end of the second movable slot 6 adjacent to the transition block by a second return spring 22, and the end of the fourth link 27 extending in the second movable slot 6 is also in contact with the front end of the transition block 21.
The semi-clamping ring 1 is provided with a concave structure, and the connecting block 2 is provided with a convex part (the second movable groove 6 is approximately positioned in the convex part) which can be arranged at the concave structure of the semi-clamping ring 1; the slide 34 is in contact with the outside of the projection on the connecting block 2. A half insert block 28 connected in the half snap ring 1 in a sliding way, and one end of the half insert block extends into the concave structure of the half snap ring 1; the rear end of the transition block 21 passes through the second movable groove 6, out of the rear surface of the connecting block 2 to the recessed structure, and contacts the half insert block 28.
Both ends of the transition block 21, i.e., surfaces contacting the fourth link 27 and the half insert block 28 are obliquely disposed; the surface of the half insert block 28, which is in contact with the transition block 21, is also obliquely arranged, and the inclined surface of the half insert block 28 is matched with the inclined surface at the rear end of the transition block 21; the other end (the end far away from the inclined surface) of the half insertion block 28 penetrates the surface of the half snap ring 1 and is fixedly connected with a handle block 29; the outer wall cover of half inserted block 28 is equipped with third reset spring 30, and the both ends of third reset spring 30 are connected with handle piece 29 and half snap ring 1 fixed surface respectively.
The working principle of the invention is as follows:
during the use, install this device earlier on the outer wall of post insulator bottom flange, rotate half snap ring 1 promptly and make two half snap ring 1 parcels on the outer wall of ring flange, avoid this device to install the influence that causes its vibration at the flange lateral wall like this, then, realize spacing to arc pole 32 through the cooperation of bolt 33 with spacing mouthful, guarantee the stability of two half snap ring 1 on the flange outer wall.
Next, referring to fig. 4, pressing the handle block 29 causes the half insertion block 28 to move in a direction (downward as shown) extending into the recessed structure, the transition block 21 contacting with the half insertion block 28 is pushed to move forward by the inclined surface of the half insertion block 28, so that the fourth link 27 (upward as shown) is pushed up by the inclined surface of the front end of the transition block 21, the mounting block 25 (upward as shown) is moved, the stopper 24 is moved backward by the third link 26, the stopper 24 is mostly retracted into the inner groove 23, the stopper of the push block 14 is released, the push block 14 is made slidable (downward as shown) by the elastic potential energy of the first return spring 19, the slide block 12 is moved forward by the first link 15, the guide rod 13 passes through the conduction port 10 at the stopper 9 to eject the launching ball 11 forward out of the storage groove 4, so that the ejected launching ball 11 collides with the outer wall of the flange, the post insulator vibrates, the launching balls 11 rebound through the outer wall of the flange and enter the containing groove 3 through the inlet 8, and the launching balls 11 are buffered through the sand body 7.
As shown in fig. 2 and 4, under the action of the second and third return springs 22 and 30, the transition block 21 moves backward and pushes the half insert block 28, and the half insert block 28 slides in the reverse direction (upward in the drawing); moreover, the mounting block 25 can fall down along with the fourth connecting rod 27, and the mounting block 25 enables the limiting block 24 to move forwards through the third connecting rod 26, so that the front end of the limiting block 24 enters the first movable groove 5; the pushing block 14 is driven by the handle 17 to move reversely (upward as shown in the figure) until the first surface of the pushing block 14 is limited by the second surface of the limiting block 24: during the reverse motion of the pushing block 14, the second face of the pushing block 14 pushes the first face of the limiting block 24 to incline for a short time, so that the limiting block 24 retreats backwards into the inner groove 23, the pushing block 14 continues to move reversely until the limiting block 24 is not pushed by the pushing block 14 any more, and the front end of the limiting block 24 enters the first movable groove 5 again to limit the pushing block 14. At this time, guide rod 13 of slide block 12 is separated from conduction opening 10 of stopper 9, and launching ball 11 can be continuously placed in front of stopper 9.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. An excitation head for vibro-acoustic detection, characterized in that,
two half-snap rings arranged oppositely, surrounding the outer wall of the flange of the post insulator;
the connecting blocks are respectively connected with the semi-clamping rings in a sliding manner and can annularly slide along the inner sides of the semi-clamping rings; each connecting block, comprising:
the storage tank is used for placing the launching balls to be launched;
the triggering mechanism is used for ejecting the launching balls out of the storage groove; the popped launching ball collides with the outer wall of the flange, so that the post insulator vibrates;
and the receiving groove is used for receiving the launching ball rebounded through the outer wall of the flange.
2. The excitation head for vibroacoustic detection according to claim 1,
a stop block is fixedly connected in the storage groove, and a launching ball to be launched is placed on the front side of the stop block; a conduction opening is formed in the stop block;
the trigger mechanism comprises a sliding block which is connected with the inner wall of the storage groove in a sliding manner, and the sliding block is positioned behind the stop block; the sliding block is provided with a guide rod corresponding to the conduction port;
the sliding block can slide to a position that the guide rod penetrates through the conduction opening to push the launching ball;
one end of the storage groove is provided with a first opening communicated with the front surface of the connecting block, the first opening faces the outer wall of the flange, and the launching ball pushed by the guide rod is ejected out of the storage groove through the first opening.
3. The excitation head for vibroacoustic detection according to claim 2,
each connecting block is provided with a first movable groove; the other end of the storage groove is communicated to the front side of the first movable groove through the penetrating groove;
the trigger mechanism further comprises:
the pushing block is connected with the inner wall of the first movable groove in a sliding mode;
the two ends of the first connecting rod are respectively and rotatably connected with the first surface of the pushing block and the sliding block; the first connecting rod can move in the through groove;
one end of the second connecting rod is connected with the second surface of the pushing block, and the other end of the second connecting rod penetrates through a second opening formed in the connecting block and is connected with a first handle positioned outside the connecting block;
when the pushing block slides in the first movable groove along the first direction, the sliding block is driven by the first connecting rod to move forwards in the storage groove, and the guide rod can penetrate through the conduction opening to push the launching ball; or, under the drive of the first handle, when the pushing block slides in the first movable groove along the second direction, the sliding block is driven by the first connecting rod to move backwards in the storage groove, so that the guide rod is separated from the conduction opening of the stop block; the first direction of the pushing block sliding in the first movable groove is opposite to the second direction.
4. The excitation head for vibroacoustic detection according to claim 3,
an adjusting block and an adjusting mechanism are arranged outside the connecting block;
the adjusting block is sleeved on the outer wall of the second connecting rod in a sliding manner; the adjusting block is connected with the corresponding position on the connecting block through an adjusting mechanism; a first return spring is sleeved on the outer wall of the second connecting rod and positioned between the second surface of the pushing block and the adjusting block; the corresponding location on the connector block comprises a connector block surface adjacent the second opening;
the adjusting mechanism comprises a screw rod which is rotatably connected to the adjusting block and provided with a handle disc, a thread groove matched with the screw rod is formed in the corresponding position on the connecting block, and the distance between the adjusting block and the connecting block can be adjusted through the adjusting mechanism.
5. The excitation head for vibroacoustic detection according to claim 3,
an inner groove is formed in the rear side of the inner wall of the first movable groove, and a limiting block is connected in the inner groove in a sliding mode; the limiting block can slide along the front-back direction and is vertical to the sliding direction of the pushing block in the first movable groove;
the inner groove is also connected with an installation block in a sliding manner, and the sliding direction of the installation block is consistent with the sliding direction of the pushing block in the first movable groove; a third connecting rod is arranged in the inner groove, and two ends of the third connecting rod are respectively and rotatably connected with the mounting block and the limiting block;
when the mounting block slides along the first direction, the limiting block is driven to move forwards through the third connecting rod, so that at least the front end of the limiting block enters the first movable groove; when the second surface of the limiting block contacts the first surface of the pushing block, the limiting block limits the pushing block;
or when the pushing block slides along the second direction, the limiting block is pushed by the pushing block during the period from the contact of the second surface of the pushing block to the separation of the first surface of the pushing block and the second surface of the limiting block, and the limiting block moves backwards and retreats into the inner groove, so that the pushing block can continuously slide along the second direction; with the backward movement of the limiting block, the mounting block is driven to slide towards the second direction through the third connecting rod;
wherein, the first face of stopper is the inclined plane.
6. The excitation head for vibroacoustic detection according to claim 5,
each connecting block is provided with a second movable groove; the first movable groove is communicated with the second movable groove through a first channel; the inner wall of the second movable groove is connected with a transition block in a sliding manner, and the transition block can slide back and forth; a second return spring is arranged between the front end of the transition block and the front end of the second movable groove;
the mounting block is also fixedly connected with one end of the fourth connecting rod; the other end of the fourth connecting rod penetrates through the first channel, extends into the second movable groove and is in contact with the front end of the transition block; the rear end of the second movable groove is provided with a third opening communicated to the rear surface of the connecting block, and the rear end of the transition block extends to the outside of the connecting block from the third opening;
the half clamping ring is provided with a second channel, and one end of the second channel is provided with a fourth opening communicated with the outside of the half clamping ring; the half insert block penetrates through the second channel, and one end of the half insert block extends to the outside of the half clamp ring from the fourth opening and is in contact with the rear end of the transition block;
when the half insertion block slides along the first direction, the transition block is pushed to move forwards, and then the mounting block is driven to slide along the second direction through the movement of the fourth connecting rod; or, under the action of the second return spring, when the transition block moves backwards, the fourth connecting rod moves to drive the mounting block to slide along the first direction, and the half insertion block is pushed to slide along the second direction along with the backward movement of the transition block.
7. The excitation head for vibroacoustic detection according to claim 6,
the other end of the second channel of the half clamping ring is provided with a fifth opening communicated with the outside of the half clamping ring;
the other end of the half insertion block extends to the outside of the half clamping ring from the fifth opening, and the other end of the half insertion block is fixedly connected with a handle block; a third return spring is sleeved on the outer wall of the half insertion block and is positioned between the handle block and the surface of the half clamping ring near the fifth opening;
the half insertion block is driven to slide along a first direction by the handle block; or the half insert block slides along the second direction under the action of a third return spring;
the rear end of the transition block is an inclined plane, and the end, contacted with the half insertion block, of the half insertion block is an inclined plane matched with the half insertion block; the front end of the transition block is an inclined surface, and the end part of the fourth connecting rod is contacted with the inclined surface at the front end of the transition block.
8. The excitation head for vibroacoustic detection according to claim 2,
the accommodating groove is provided with an inlet communicated to the front surface of the connecting block; the launching balls rebounded through the outer wall of the flange enter the accommodating groove through the inlet; the accommodating groove is internally provided with a buffered sand body;
the inlet is gradually reduced, namely a front opening at the inlet communicated with the front surface of the connecting block is larger than a rear opening at the inlet communicated with the accommodating groove;
at least two opposite side walls of the inlet are obliquely arranged, and one oblique side wall of the inlet is consistent with the oblique direction of the storage groove;
the rear side wall of the accommodating groove is obliquely arranged; the rear side wall is a side wall of the receiving groove opposite to the rear opening of the inlet.
9. The excitation head for vibroacoustic detection according to claim 1,
one end of each of the two half clamping rings is rotatably connected, and the other ends of the two half clamping rings are mutually separated or connected through a clamping mechanism; after the two half clamping rings are arranged on the outer wall of the flange of the post insulator in a surrounding mode, the two half clamping rings are connected through a clamping mechanism;
the clamping mechanism comprises two fixing blocks which are oppositely arranged and respectively connected to the radial outer side surfaces of the other ends of the two half clamping rings; wherein, the first fixed block is connected with the fixed end of the arc-shaped rod; the second fixed block is provided with a socket matched with the insertion end of the arc-shaped rod, and is also radially provided with a third channel communicated with the socket;
a bolt is connected in the third channel in a sliding manner, and the arc-shaped rod is provided with a limit port matched with the bolt; when the two half clamping rings are connected through the clamping mechanism, the insertion end of the arc-shaped rod is inserted into the socket, and the end part of the bolt is inserted into the limiting opening, so that the arc-shaped rod is limited;
the end part of the bolt is an inclined plane, and the inclined plane faces to the position of the first fixed block; the inserting end of the arc-shaped rod is provided with an inclined plane which is opposite to the inclined plane at the end part of the bolt;
the bolt is provided with a handle which is positioned outside the outer side surface of the second fixed block;
the part of the bolt, which is left outside the outer surface of the second fixed block, is sleeved with a return spring.
10. The excitation head for vibroacoustic detection according to claim 1,
the inner side of the semi-clamping ring is provided with a sliding groove and a sliding block to be matched with the connecting block, so that the annular sliding and position adjustment of the connecting block are realized.
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| CN202010650411.0A CN111766031B (en) | 2020-07-08 | 2020-07-08 | Vibration excitation head for vibration acoustic detection in power industry |
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| CN202010650411.0A CN111766031B (en) | 2020-07-08 | 2020-07-08 | Vibration excitation head for vibration acoustic detection in power industry |
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| CN111766031B true CN111766031B (en) | 2022-01-25 |
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