CN112885547A - Drop-out arrester for oil field - Google Patents
Drop-out arrester for oil field Download PDFInfo
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- CN112885547A CN112885547A CN202110468170.2A CN202110468170A CN112885547A CN 112885547 A CN112885547 A CN 112885547A CN 202110468170 A CN202110468170 A CN 202110468170A CN 112885547 A CN112885547 A CN 112885547A
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- rod
- arrester
- main body
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- arrester main
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
- H01C7/126—Means for protecting against excessive pressure or for disconnecting in case of failure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/01—Mounting; Supporting
- H01C1/014—Mounting; Supporting the resistor being suspended between and being supported by two supporting sections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/2463—Electromagnetic mechanisms with plunger type armatures
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- Gas-Insulated Switchgears (AREA)
Abstract
The invention discloses a drop-down arrester for an oil field, which relates to the field of oil exploitation and comprises an insulating support column, an arrester main body, a mounting plate and a conductive pressing plate, wherein the bottom of the insulating support column is connected with the bottom of the arrester main body through the mounting plate, the top of the insulating support column is connected with the top of the arrester main body through the conductive pressing plate, the bottom of the arrester main body is rotatably connected to the mounting plate and is provided with a disconnector, a pull ring assembly is arranged on the outer side of the top of the arrester main body, a pushing-off mechanism is arranged near the top of the insulating support column, the pushing-off mechanism comprises a mounting shell, an electromagnetic tripping mechanism, a pushing-off rod and a pushing-off spring, the pushing-off rod is slidably connected into the mounting shell, one end of the pushing-off rod, which extends out of the mounting shell, is close to or abuts against the inner side surface of the upper part of the arrester main body, and the pushing, the electromagnetic tripping mechanism is connected with the disconnector in parallel or in series.
Description
Technical Field
The invention relates to the field of oil exploitation, in particular to a drop-out lightning arrester for an oil field.
Background
The drop-out arrester is characterized in that a distribution type zinc oxide arrester is modified and then skillfully installed on a drop-out mechanism of a drop-out fuse, so that the arrester can be conveniently detected, maintained and replaced by means of an insulating brake operating lever under the condition of no power failure.
The existing drop-out arrester is provided with a separator, as shown in the patent of invention with the publication number of CN105680404, the separator is a thermal explosion type separator or a hot melt type separator, and when power frequency short circuit current occurs, the separator rapidly acts to turn over the arrester element, thereby realizing the automatic separation operation of the arrester.
However, there are many potential safety hazards when this kind of arrester is used in the oil gas exploitation field, because drop-out arrester is installed to the open air usually in the oil field, and its mode of breaking away from is all falling the circumstances of breaking away from downwards through the gravity of arrester main part self, there is the corrosion condition in arrester main part and the conducting pressure plate inevitable in the outdoor environment of perennial, at the disconnector during operation, can appear in a while the arrester main part top because combine too closely and can not break away from the circumstances fast with conducting pressure plate, and then cause more serious follow-up and carry on the problem.
Therefore, a new drop-out arrester suitable for oil field is needed, which can solve the above problems.
Disclosure of Invention
The invention aims to provide a novel technical scheme of a drop-out arrester for an oil field.
According to a first aspect of the invention, a drop-out arrester for an oil field is provided, which comprises an insulating support column, an arrester main body, a mounting plate and a conductive pressing plate, wherein the bottom of the insulating support column is connected with the bottom of the arrester main body through the mounting plate, the top of the insulating support column is connected with the top of the arrester main body through the conductive pressing plate, the bottom of the arrester main body is rotatably connected to the mounting plate and is provided with a disconnector, a pull ring assembly is arranged on the outer side of the top of the arrester main body, a pushing-off mechanism is arranged near the top of the insulating support column, the pushing-off mechanism comprises a mounting shell, an electromagnetic tripping mechanism, a pushing-off rod and a pushing-off spring, the pushing-off rod is slidably connected into the mounting shell, one end of the pushing-off rod, which extends out of the mounting shell, is close to or abutted to the inner side surface of the upper part of the arrester main body, and the pushing-off, the electromagnetic tripping mechanism blocks or releases the push-off rod to move towards the arrester main body, and the electromagnetic tripping mechanism is connected with the disconnector in parallel or in series.
Through this scheme, to push away from the pole inwards extrusion and push away from the spring and will push away from the pole and block with the electromagnetism release, the messenger pushes away from the state that the spring kept the compression, when the arrester main part breaks down, the power frequency short-circuit current of production is in the drive release in, because parallelly connected or the series connection with electromagnetism tripping device, electromagnetism tripping device moves, the pole that pushes away of release strikes the arrester main part under the promotion that pushes away from the spring, make the arrester main part break away from conducting plate rapidly under the effect of external force, realize the purpose of arrester main part automatic cutout, avoid arrester main part top because of combining too closely the problem that can't cut off with conducting plate, the reliability is greatly improved.
Preferably, one side of the installation shell is fixed with a fixing ring, the installation shell is fixed to the insulating support column through the fixing ring, and the fixing ring is made of a ceramic material.
Through this scheme, ceramic material's solid fixed ring has avoided the arrester main part short-circuit current to transmit to insulating pillar and has caused danger under the prerequisite of guaranteeing to push away from the stable installation of mechanism in the use.
Preferably, the electromagnetic tripping mechanism comprises an electromagnetic coil, an armature and a return spring, the electromagnetic coil is connected with the disconnector in parallel, the top of the armature is matched with a fixed block at the bottom of the push-off rod, the return spring is sleeved outside the armature and always applies thrust towards the direction of the push-off rod to the armature, and the electromagnetic coil is arranged at the bottom of the armature and matched with the armature.
Through the scheme, in the normal use process, the reset spring pushes the armature to block the front of the fixed block, so that the effect of fixing the push-off rod is realized; when power frequency short circuit current appears, the current flowing through the electromagnetic coil is suddenly increased, the electromagnetic coil attracts the armature to enable the armature to be separated from the contact with the fixed block, and the push-off rod is released and then pushed by the push-off spring to impact the lightning arrester main body.
Preferably, a first reset slope is arranged on one side face, far away from the arrester main body, of the fixed block, and a first inclined face matched with the first reset slope is arranged on one side face, facing the arrester main body, of the top of the armature.
Through this scheme, push away from the pole action after, only need promote when reseing again and push away from the pole, make the arrester main part promote when promoting the arrester main part promptly and push away from the pole, make first slope that resets promote armature along first inclined plane, make armature stop again to the fixed block before, the convenient resetting.
Preferably, the push away from stretching out of pole the one end of installation shell is provided with the insulating head, the insulating head is made for ceramic material, the orientation of insulating head the one end of arrester main part is provided with the rubber pad.
By the scheme, the insulating head can further play an insulating role, so that the situation that the main body shell of the lightning arrester is punctured by power frequency short-circuit current to enable the push-off rod to be electrified is avoided, and the current damages the electromagnetic tripping mechanism is further avoided; the rubber pad can play the cushioning effect, avoids the striking to damage insulator head and arrester main part.
Preferably, the pull ring assembly comprises a first conductive rod and an insulating ring, the insulating ring is fixed to one end of the first conductive rod, the first conductive rod radially penetrates through the arrester main body and is in sliding connection with the arrester main body, an annular isolation groove is formed in the first conductive rod, and a battery cell in the arrester main body is always in abutting contact with the first conductive rod; the lightning arrester is characterized in that a second conducting rod is connected to the lightning arrester main body in a sliding mode, one end of the second conducting rod is always extruded to the first conducting rod under the elastic force of a first extrusion spring, the other end of the second conducting rod can be in contact with the conductive pressing plate, and the push-away rod can push the first conducting rod to enable the second conducting rod to enter the isolation groove.
Through the scheme, when the lightning arrester is normally used, the first conducting rod extends out towards the direction of the push-off rod, so that the second conducting rod is positioned on one side of the isolation groove and is extruded onto the conducting pressing plate, the conducting pressing plate is conducted with the battery cell through the second conducting rod and the first conducting rod, and the lightning arrester main body normally works; when the push-off rod acts to push the first conducting rod, along with the movement of the first conducting rod, the second conducting rod slides to the isolation groove and is pushed into the isolation groove under the elastic force of the first extrusion spring, the second conducting rod is separated from the contact with the conducting pressing plate, the rapid isolation power-off is realized, and the problem that the lightning arrester main body cannot be separated due to the fact that the lost extrusion force does not cause any friction force between the lightning arrester main body and the conducting pressing plate is solved thoroughly.
Preferably, the number of the second conducting rods is two and is perpendicular to the first conducting rod, the second conducting rods are connected into the arrester main body in a sliding mode along the radial direction, two sides of the conducting pressing plate are bent downwards at right angles to form a conducting part, and the second conducting rods can be extruded onto the conducting part.
Through this scheme, the second conducting rod can be conducted to both sides extrusion and conductive part extrusion, improves area of contact to improve the conducting capacity of arrester main part, and then help improving the reliability of this device.
Preferably, the battery cell is slidably connected into the arrester main body, and the battery cell is always pressed onto the first conducting rod under the elastic force of the second pressing spring; the upper portion axial sliding connection of arrester main part has the third conducting rod, the third conducting rod upwards stretches out the arrester main part and supports to on the electrically conductive clamp plate, the third conducting rod supports all the time to on the first conducting rod under the effect of third extrusion spring.
Through this scheme, keep electric core and first conducting rod in close contact with all the time to the setting up of third conducting rod has increased the contact point, has further improved the reliability when this device uses.
Preferably, the orientation of first conducting rod the one end that pushes away from the pole is provided with the insulating piece, the orientation of insulating piece the one side that pushes away from the pole is provided with the blotter.
By the scheme, the insulating sheet can further isolate the first conducting rod from the push-off rod, so that damage to the push-off mechanism caused by breakdown is avoided; the blotter is the rubber material, can play the guard action to ceramic material's insulating piece, avoids strikeing too big and damage.
Preferably, one side of the isolation groove close to the insulating ring is a second reset slope, and the second conducting rod, the third conducting rod and one end of the battery cell contacting the first conducting rod are provided with second inclined planes matched with the second reset slope.
Through this scheme, the arrester main part is at the in-process that resets, when promoting first conducting rod extrusion and pushing away from the pole, second conducting rod, third conducting rod and electric core all can move down the isolation groove in the cooperation on second inclined plane and second reset slope, make it reset to the position of extrusion conducting clamp plate again, made things convenient for greatly to reset.
According to an embodiment of the present disclosure, this device simple structure, convenient to use and reliability are high, can move rapidly when producing power frequency short-circuit current, push away the arrester main part, make it break away from the circuit rapidly, avoid bigger later stage and take place with the accident, do not receive outdoor adverse circumstances's influence, improved reliability and security of use greatly, be fit for the oil and gas exploitation field and use.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural view of a drop-out arrester for an oil field according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of the push-off mechanism of fig. 1.
Fig. 3 is a schematic diagram of the structure at a in fig. 2.
Fig. 4 is a schematic structural view of an upper portion of the arrester main body of fig. 1.
Fig. 5 is a schematic sectional view taken along the direction B-B in fig. 4.
Fig. 6 is a schematic view of the structure of the arrester of fig. 5 after the main body is detached.
Fig. 7 is a partial structural schematic view of the conductive platen of fig. 4.
Fig. 8 is a schematic view of the first conductive rod of fig. 5.
Fig. 9 is a schematic longitudinal sectional view of fig. 4.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Examples
As shown in fig. 1 to 9, the drop-down arrester for oil field in this embodiment includes an insulating support column 1100, an arrester main body 1200, a mounting plate 1120, and a conductive pressing plate 1110, wherein the bottom of the insulating support column 1100 is connected to the bottom of the arrester main body 1200 through the mounting plate 1120, the top of the insulating support column 1100 is connected to the top of the arrester main body 1200 through the conductive pressing plate 1110, the bottom of the arrester main body 1200 is rotatably connected to the mounting plate 1120 and is provided with a disconnector (not shown), and a pull ring assembly 1210 is disposed outside the top of the arrester main body 1200;
a push-off mechanism 1300 is disposed near the top of the insulating support 1100, the push-off mechanism 1300 includes a mounting housing 1321, an electromagnetic trip mechanism, a push-off rod 1322 and a push-off spring 1323, the push-off rod 1322 is slidably connected to the mounting housing 1321, one end of the push-off rod 1322 extending out of the mounting housing 1321 is close to or abutted against an upper inner side surface of the arrester main body 1200, the push-off spring 1323 always applies an elastic force to the push-off rod 1322 toward the arrester main body 1200, the electromagnetic trip mechanism blocks or releases the push-off rod 1322 to move toward the arrester main body 1200, and the electromagnetic trip mechanism is connected in parallel or in series with the disconnector.
According to the scheme of the embodiment, the push-off rod 1322 is inwards extruded to push the push-off spring 1323, the push-off rod 1322 is blocked by the electromagnetic release, so that the push-off spring 1323 is kept in a compressed state, when the arrester main body 1200 breaks down, the generated power frequency short circuit current drives the release, and meanwhile, due to the parallel connection or the serial connection with the electromagnetic release mechanism, the electromagnetic release mechanism acts, the released push-off rod 1322 impacts the arrester main body 1200 under the pushing of the push-off spring 1323, so that the arrester main body 1200 is quickly separated from the conductive pressing plate 1110 under the action of external force, the purpose of automatically cutting off the arrester main body 1100 is achieved, the problem that the top of the arrester main body 1200 cannot be cut off due to the fact that the top is too tightly combined with the conductive pressing plate 1110 and corrosion is generated after long-term use is avoided.
In this embodiment or other embodiments, a fixing ring 1310 is fixed to one side of the mounting shell 1321, the mounting shell 1321 is fixed to the insulating support 1100 through the fixing ring 1310, and the fixing ring 1310 is made of a ceramic material. The fixing ring 1310 of ceramic material prevents the short circuit current from being transmitted to the insulating support 1100 during the use of the lightning arrester main body, while ensuring the stable installation of the push-off mechanism 1300.
In this embodiment or other embodiments, the electromagnetic trip mechanism includes an electromagnetic coil 1331, an armature 1332, and a return spring 1333, the electromagnetic coil 1331 is connected in parallel with the detacher, the top of the armature 1332 is engaged with a fixed block 1324 at the bottom of the push-off rod 1322, the return spring 1333 is sleeved outside the armature 1332 and always applies a pushing force to the armature 1332 in a direction toward the push-off rod 1322, the electromagnetic coil 1331 is disposed at the bottom of the armature 1332 and is engaged with the armature 1332, and when a power frequency short circuit current passes through the electromagnetic coil 1331, an attraction force of the electromagnetic coil 1331 to the armature 1332 is greater than a maximum elastic force of the return spring 1333.
In the normal use process, the return spring 1333 pushes the armature 1332 to block the front of the fixed block 1324, so that the function of fixing the push-off rod 1322 is realized, and the push-off spring 1323 is always in a compressed state; when power frequency short circuit current occurs, the current flowing through the electromagnetic coil 1331 is suddenly increased, the electromagnetic coil 1331 attracts the armature 1332 to enable the armature 1332 to be separated from the contact with the fixed block 1324, the push-off rod 1322 is released, and the push-off spring 1323 pushes the impact on the lightning arrester main body 1200, so that the purpose of separating the lightning arrester main body 1200 is achieved.
In this embodiment or other embodiments, a side of the fixing block 1324 away from the arrester main body 1200 is provided with a first reset slope 1324-1, and a side of the top of the armature 1332 facing the arrester main body 1200 is provided with a first inclined surface 1332-1 matched with the first reset slope 1324-1. After the push-off rod 1322 is moved, the push-off rod 1322 is only needed to be pushed when the lightning arrester body 1200 is pushed to reset, that is, the lightning arrester body 1200 is pushed to push the push-off rod 1322 when the lightning arrester body 1200 is pushed to reset, so that the first reset slope 1324-1 pushes the armature 1332 downwards along the first inclined plane 1332-1, and thus the fixed block 1324 can be returned to the other side of the armature 1322 again, and the armature 1332 blocks the fixed block 1324 again under the pushing of the reset spring 1333, thereby facilitating the reset.
In this embodiment or other embodiments, an insulating head 1325 is disposed at an end of the push-off rod 1322 protruding out of the mounting shell 1321, the insulating head 1325 is made of a ceramic material, and a rubber pad 1326 is disposed at an end of the insulating head 1325 facing the lightning arrester main body 1200. The insulating head 1325 can further play an insulating role, so that the situation that the power frequency short-circuit current breaks through the shell of the main body 1200 of the lightning arrester to enable the push-off rod 1322 to be electrified is avoided, and the current damages the electromagnetic tripping mechanism is further avoided; the rubber pad 1326 can play a role of buffering to prevent the insulation head 1325 and the arrester main body 1200 from being damaged by impact.
In this embodiment or other embodiments, the pull ring assembly 1210 includes a first conductive rod 1211 and an insulating ring 1212, the insulating ring 1212 is fixed to one end of the first conductive rod 1211, the first conductive rod 1211 radially penetrates through the arrester main body 1200 and is slidably connected to the arrester main body 1200, a sliding direction of the first conductive rod 1211 coincides with a sliding direction of the push-off rod 1322, an annular isolation groove 1213 is disposed on the first conductive rod 1211, and the battery core 1220 in the arrester main body 1200 is always in contact against the first conductive rod 1211; the arrester main body 1200 is slidably connected with a plurality of second conductive rods 1230, one end of the second conductive rod 1230 is always pressed onto the first conductive rod 1211 under the elastic force of a first pressing spring 1231, the other end of the second conductive rod 1230 can be contacted with the conductive pressing plate 1110, and the push-off rod 1322 can push the first conductive rod 1211 to enable the second conductive rod 1230 to enter the isolation groove 1213.
In normal use, the first conductive rod 1211 extends toward the pushing rod 1322, so that the second conductive rod 1213 is located at one side of the isolation slot 1213 (i.e. not in the isolation slot 1213) and is pressed onto the conductive pressing plate 1110, the conductive pressing plate 1110 is conducted with the battery cell 1220 through the second conductive rod 1230 and the first conductive rod 1211, and the lightning arrester main body 1200 normally operates; when the push-off rod 1322 pushes the first conductive rod 1211, the second conductive rod 1230 slides to the isolation groove 1213 and is pushed into the isolation groove 1213 by the elastic force of the first pressing spring 1231 along with the movement of the first conductive rod 1211, the second conductive rod 1230 is separated from the contact with the conductive pressing plate 1110, so that the rapid isolation and power-off are realized, and the extrusion force is lost, so that there is no friction between the lightning arrester main body 1200 and the conductive pressing plate 1110, and the second conductive rod 1230 is more easily pushed off by the push-off rod 1322, thereby completely solving the problem that the friction between the lightning arrester main body 1200 and the conductive pressing plate 1100 is too large to be separated.
In this embodiment or other embodiments, two second conductive rods 1230 are arranged perpendicular to the first conductive rod 1211, the second conductive rods 1230 are slidably connected to the arrester main body 1200 in the radial direction, two sides of the conductive pressing plate 1110 are bent downward at a right angle to form the conductive portion 1111, the second conductive rods 1230 can be pressed onto the conductive portion 1111, the second conductive rods 1230 can be pressed to two sides to be in conductive contact with the conductive portion 1111, and the arrangement of the two second conductive rods 1230 improves the contact point and the contact area, thereby reducing the resistance, improving the conductive capability of the arrester main body 1200, and further contributing to improving the reliability of the device.
One side of the conductive pressing plate 1110 in this embodiment is a horn-shaped opening, and the conductive parts 1111 are located at two sides of the opening, so that the lightning arrester main body 1200 can be conveniently inserted into the conductive pressing plate 1110.
In this embodiment or other embodiments, the battery cell 1220 is slidably connected to the arrester main body 1200, and the battery cell 1220 is always pressed onto the first conductive rod 1211 by the elastic force of the second pressing spring 1221; a third conducting rod 1240 is axially and slidably connected to the upper portion of the arrester main body 1200, the third conducting rod 1240 extends upward out of the arrester main body 1200 and abuts against the conductive pressing plate 1110, and the third conducting rod 1240 always abuts against the first conducting rod 1211 under the action of a third pressing spring 1241.
The second pressing spring 1221 can keep the battery cell 1220 in close contact with the first conductive rod 1211 at all times, and the third conductive rod 1240 increases the contact point, further improving the reliability of the device in use.
In this or other embodiments, an insulating sheet 1214 is disposed on an end of the first conductive rod 1211 facing the push-off rod 1322, and a cushion 1215 is disposed on a side of the insulating sheet 1214 facing the push-off rod 1322. The insulating sheet 1214 is made of a ceramic material, which can further isolate the first conductive rod 1211 and the push-off rod 1322 from each other, thereby preventing the push-off mechanism from being damaged due to breakdown; the cushion pad 1215 is made of rubber, can protect the insulating sheet 1214 made of ceramic, and avoids the damage caused by too large impact.
In this embodiment or other embodiments, a second reset slope 1213-1 is disposed on a side of the isolation slot 1213 close to the insulating ring 1212, and the second conductive rod 1230, the third conductive rod 1240 and an end of the battery cell 1220 contacting the first conductive rod 1211 are all provided with a second inclined plane 1201 matching with the second reset slope 1213-1.
In the resetting process of the arrester main body 1200, when the first conducting rod 1211 is pushed to extrude the pushing rod 1322, the second conducting rod 1230, the third conducting rod 1240 and the battery cell 1220 can move out of the isolation slot 1213 under the matching of the second inclined plane 1201 and the second resetting slope 1213-1, so that the second conducting rod 1230, the third conducting rod 1240 and the battery cell 1220 are reset to the position of pushing the conducting pressing plate 1110 again, which is greatly convenient for resetting.
In the normal use process of the device, the top of the arrester main body 1200 is located in the conductive pressing plate 1110, the second conductive rod 1230 and the third conductive rod 1240 extend out and are abutted to the conductive pressing plate 1110 for conduction, and the push-off rod 1322 extrudes the push-off spring 1323 and is blocked by the armature 1332;
when the arrester main body 1200 fails and generates power frequency short circuit current, the electromagnetic coil 1331 generates strong attraction force to attract the armature 1332 at a moment while the disconnector operates, so that the armature is separated from contact with the fixed block 1324, the push-off rod 1322 is released to impact the first conducting rod 1211 on the arrester main body 1200, the first conducting rod 1211 is pushed away and moves, so that the second conducting rod 1230, the third conducting rod 1240 and the battery core 1220 are pushed into the isolation groove 1213 under the action of the spring, the second conducting rod 1230 and the third conducting rod 1240 are separated from contact with the conducting pressure plate 1110, and the top of the arrester main body 1200 can be quickly pushed away without resistance while quick cutting is realized;
if the reset is needed, the rod body is inserted into the insulating ring 1212 to push the lightning arrester main body 1200 upwards, the first conducting rod 1211 presses the push-off rod 1322, so that the push-off rod 1322 pushes the armature 1332 downwards along the first inclined plane 1332-1 at the first reset slope 1324-1, and thus the fixed block 1324 can return to the other side of the armature 1322 again, and the armature 1332 stops the fixed block 1324 again under the push of the reset spring 1333;
meanwhile, the movement of the first conducting rod 1211 enables the second conducting rod 1230, the third conducting rod 1240 and the battery core 1220 to move out of the isolation slot 1213 under the matching of the second inclined plane 1201 and the second reset slope 1213-1, so that the second conducting rod 1230 and the third conducting rod 1240 are reset to the position of the extruded conducting pressing plate 1110 again, the reset conduction of the lightning arrester main body 1200 is realized, and the operation is greatly facilitated.
According to this embodiment, this device simple structure, convenient to use and reliability are high, can move rapidly when producing power frequency short-circuit current, push away the arrester main part from, make it break away from the circuit rapidly, avoid bigger later stage to take place with the accident, do not receive outdoor adverse circumstances's influence, improved reliability and security of using greatly, filled the blank of the dedicated drop-out arrester in oil gas exploitation field.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A drop-out arrester for an oil field comprises an insulating support column, an arrester main body, a mounting plate and a conductive pressing plate, wherein the bottom of the insulating support column is connected with the bottom of the arrester main body through the mounting plate, the top of the insulating support column is connected with the top of the arrester main body through the conductive pressing plate, the bottom of the arrester main body is rotatably connected to the mounting plate and provided with a disconnector, and a pull ring assembly is arranged on the outer side of the top of the arrester main body. The electromagnetic tripping mechanism blocks or releases the push-off rod to move towards the arrester main body, and the electromagnetic tripping mechanism is connected with the disconnector in parallel.
2. The drop type arrester of claim 1, wherein a fixing ring is fixed to one side of the mounting shell, the mounting shell is fixed to the insulating support through the fixing ring, and the fixing ring is made of a ceramic material.
3. The drop-out arrester for the oil field according to claim 1, wherein the electromagnetic tripping mechanism comprises an electromagnetic coil, an armature and a return spring, the electromagnetic coil is connected with the disconnector in parallel, the top of the armature is matched with a fixed block at the bottom of the push-off rod, the return spring is sleeved outside the armature and always applies thrust towards the direction of the push-off rod to the armature, and the electromagnetic coil is arranged at the bottom of the armature and matched with the armature.
4. The drop-down arrester for the oil field as claimed in claim 3, wherein a first reset slope is provided on a side surface of the fixing block away from the arrester main body, and a first inclined surface matched with the first reset slope is provided on a side surface of the top of the armature facing the arrester main body.
5. The drop-down arrester as claimed in claim 1, wherein an insulating head is disposed at an end of the push-off rod extending out of the mounting housing, the insulating head is made of ceramic material, and a rubber pad is disposed at an end of the insulating head facing the arrester main body.
6. The drop-out arrester as claimed in claim 1, wherein the pull ring assembly comprises a first conductive rod and an insulating ring, the insulating ring is fixed to one end of the first conductive rod, the first conductive rod radially penetrates through the arrester main body and is slidably connected with the arrester main body, an annular isolation groove is formed in the first conductive rod, and the battery cell in the arrester main body is always in contact with the first conductive rod in an abutting manner; the lightning arrester is characterized in that a second conducting rod is connected to the lightning arrester main body in a sliding mode, one end of the second conducting rod is always extruded to the first conducting rod under the elastic force of a first extrusion spring, the other end of the second conducting rod can be in contact with the conductive pressing plate, and the push-away rod can push the first conducting rod to enable the second conducting rod to enter the isolation groove.
7. The drop type arrester as claimed in claim 6, wherein two second conductive rods are arranged perpendicular to the first conductive rod, the second conductive rods are slidably connected to the arrester main body in a radial direction, two sides of the conductive pressing plate are bent at a right angle downward to form a conductive portion, and the second conductive rods can be pressed onto the conductive portion.
8. The drop-out arrester of claim 7 wherein the electrical core is slidably connected to the arrester main body, and the electrical core is always pressed onto the first conductive rod by the elastic force of the second pressing spring; the upper portion axial sliding connection of arrester main part has the third conducting rod, the third conducting rod upwards stretches out the arrester main part and supports to on the electrically conductive clamp plate, the third conducting rod supports all the time to on the first conducting rod under the effect of third extrusion spring.
9. The drop-out arrester as claimed in claim 8, wherein an end of the first conducting rod facing the push-off rod is provided with an insulating sheet, and a surface of the insulating sheet facing the push-off rod is provided with a cushion pad.
10. The drop-out arrester as claimed in claim 8, wherein a second reset slope is disposed on a side of the isolation slot close to the insulating ring, and second slopes matched with the second reset slope are disposed on the second conducting rod, the third conducting rod and one end of the battery cell contacting the first conducting rod.
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Cited By (1)
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|---|---|---|---|---|
| CN113937629A (en) * | 2021-10-13 | 2022-01-14 | 郑州铁路职业技术学院 | Lightning protection device for electrical equipment |
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