CN109556853B - Clamp tensile test tool is changed to insulator - Google Patents
Clamp tensile test tool is changed to insulator Download PDFInfo
- Publication number
- CN109556853B CN109556853B CN201910074433.4A CN201910074433A CN109556853B CN 109556853 B CN109556853 B CN 109556853B CN 201910074433 A CN201910074433 A CN 201910074433A CN 109556853 B CN109556853 B CN 109556853B
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- isosceles triangle
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- yoke plate
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- 238000009864 tensile test Methods 0.000 title claims abstract description 55
- 239000012212 insulator Substances 0.000 title claims abstract description 37
- 238000012360 testing method Methods 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 238000010998 test method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The embodiment of the application discloses fixture tensile test instrument is changed to insulator includes: the isosceles triangle connecting plate is provided with a first connecting hole at the vertex angle, a second connecting hole and a third connecting hole are respectively arranged at two bottom corners, and the length of a connecting line of the hole centers of the second connecting hole and the third connecting hole is equal to the distance between the connecting holes of the screw rods at two sides of the wing-shaped clamp; the technical problem that a tensile test of replacing a fixture for an insulator cannot be performed due to the fact that no matched test tool exists at present is solved. The embodiment of the application also provides a large knife clamp tensile test method.
Description
Technical Field
The application relates to the technical field of live working, in particular to a tension test tool for an insulator replacement fixture and a tension test method for a large-blade fixture.
Background
When the insulator is replaced, auxiliary operations are usually required by means of various clamps, and the wing type clamps and the large knife clamps are all commonly used auxiliary clamps.
For the wing-shaped clamp, when one Zhang Dadi insulator or the whole string of insulators is replaced, the wing-shaped clamp can be installed on a traction plate at the head end of a tower, a pair of special clamps are installed on a wire end triple plate, the wing-shaped clamp is connected with the special clamps through a screw rod and a pull rod, and the load of the insulator string is transferred to the pull rod through tightening the screw rod, so that the Zhang Dadi insulator or the whole string of insulators is replaced.
For the large knife clamp, the large knife clamp generally comprises a front clamp and a rear clamp, a bayonet matched with the equipotential side connecting plate and a hook matched with a U-shaped ring on the connecting plate are arranged at the bayonet end of the front clamp, the non-bayonet end is connected with the insulating pull rod, a bayonet matched with the ground potential side connecting plate is arranged at the bayonet end of the rear clamp, and the other end of the rear clamp is connected with the screw rod assembly.
During operation, the bayonet of the front card is inserted into the shoulder of the equipotential side connecting plate, and the U-shaped ring on the side connecting plate is hooked by the hook; at the same time, the bayonet of the rear card is inserted into the shoulder of the ground potential side yoke and the end of the rear card is fixed to the side yoke. The handle on the screw rod assembly is rotated, the screw rod is tightened, the load on the insulator string at the installation side of the clamp is transferred to the clamp insulating pulling plate and the screw rod, the insulator string can be in a loose and unstressed state, and an maintainer can replace the insulator string.
Therefore, the load originally borne by the insulator string needs to be transferred to the clamp during the use process of the insulator replacement clamp, so that the clamp needs to have enough mechanical strength. In order to verify the strength of the insulator replacement fixture, a tensile test can be performed on the insulator replacement fixture, but no matched test tool exists at present, so that the tensile test cannot be performed.
Disclosure of Invention
The embodiment of the application provides a fixture tensile test instrument is changed to insulator, has solved the test instrument that does not have the matching yet at present for to the technical problem that the tensile test of fixture can't be gone on is changed to the insulator. The embodiment of the application also provides a large knife clamp tensile test method.
In view of the foregoing, a first aspect of the present application provides an insulator replacement jig tensile test tool, including: the isosceles triangle yoke plate the apex angle department of isosceles triangle yoke plate is provided with first connecting hole, and two base angles department is provided with second connecting hole and third connecting hole respectively, the second connecting hole with the length of the hole heart connecting wire of third connecting hole equals with the distance between the lead screw connecting hole of wing section fixture both sides.
Preferably, the steel pulling rod also comprises two steel pulling rods;
the steel pull rod is matched with the screw rod connecting hole of the wing-shaped clamp, the first end of the steel pull rod is provided with an anti-falling clamping ring, and the second end of the steel pull rod can penetrate through the screw rod connecting hole to be connected with the second connecting hole or the third connecting hole in a test.
Preferably, the isosceles triangle yoke plate is further provided with a pair of large knife clamp connecting holes;
and each pair of large knife clamp connecting holes are symmetrically arranged on two sides of a symmetry axis of the isosceles triangle yoke plate, and form an isosceles triangle relationship with the first connecting holes.
Preferably, the method further comprises: the isosceles triangle pair yoke plate, the apex angle department of isosceles triangle pair yoke plate is provided with the pull head connecting hole, isosceles triangle pair yoke plate still is provided with paired big sword fixture connecting hole, big sword fixture connecting hole's position with the position of big sword fixture connecting hole of isosceles triangle yoke plate corresponds.
Preferably, the front clamping device further comprises a connecting plate for connecting the front clamping device and the rear clamping device of the large knife clamping device during testing.
Preferably, two pairs of large-cutter clamp connecting holes are specifically formed in the isosceles triangle yoke plate, and the two pairs of large-cutter clamp connecting holes are respectively a first pair of large-cutter clamp connecting holes and a second pair of large-cutter clamp connecting holes.
The embodiment of the application also provides a large-blade clamp tensile test method, which applies the last two types of the insulator replacement clamp tensile test tools of the first aspect, and comprises the following steps:
s1: connecting a first connecting hole of the isosceles triangle connecting plate with one side of the tensile testing machine;
s2: connecting a pull head connecting hole of the isosceles triangle pair connecting plate with the other side of the tensile testing machine;
s3: connecting the bayonet end of the front clamp of the first pair of large-blade clamps to a large-blade clamp connecting hole on one side of the symmetry axis of the isosceles triangle yoke plate;
s4: connecting the bayonet end of the rear clamp of the first pair of large-blade clamps to the large-blade clamp connecting hole at the corresponding position of the isosceles triangle pair yoke plate;
s5: connecting the non-bayonet end of the front card with the non-bayonet end of the rear card through a connecting plate;
s6: connecting a second pair of large knife clamps on the other side of the symmetry axis of the isosceles triangle yoke plate and the isosceles triangle pair yoke plate according to the same method from S3 to S5;
s7: and starting the tensile testing machine to carry out tensile test.
From the above technical solutions, the embodiments of the present application have the following advantages:
in this application embodiment, provide a fixture tensile test instrument is changed to insulator, can use this instrument to carry out tensile test to wing section fixture. The tool comprises an isosceles triangle connecting plate, wherein three connecting holes are formed in the isosceles triangle connecting plate and are respectively positioned at a top angle and two bottom angles, the second connecting holes are positioned at the bottom angles with third connecting holes, and the length of a connecting line of the hole centers of the second connecting holes and the third connecting holes is equal to the distance between the connecting holes of screw rods on two sides of an airfoil fixture.
When the wing-shaped clamp is subjected to a tensile test, the screw rod connecting holes at the two side wing edges of the wing-shaped clamp are respectively connected with the second connecting hole and the third connecting hole of the isosceles triangle yoke plate, and then the connecting sleeve lug at the middle part of the wing-shaped clamp is connected with the pull head side of the tensile test machine, and the first connecting hole of the isosceles triangle yoke plate is fixed or connected with the opposite side of the pull head of the tensile test machine, so that the tensile test machine can be started to carry out the tensile test.
Because the distance between the second connecting hole and the third connecting hole of the isosceles triangle yoke plate corresponds to the distance between the screw rod connecting holes on two sides of the wing-shaped clamp, when the tensile force is applied by the tensile testing machine, the stress condition of the wing-shaped clamp is the same as the stress working condition when the actual insulator is replaced, namely the middle part of the wing-shaped clamp is subjected to the tensile force of the outward pull head, and the screw rod connecting holes on two sides are subjected to the counter-tensile force opposite to the tensile force applied by the pull head, so that the tensile test is realized on the basis of simulating the actual stress of the wing-shaped clamp.
Drawings
Fig. 1 is a front view and a side view of an isosceles triangle yoke plate of an insulator replacement jig tensile test tool according to a first embodiment of the present application;
fig. 2 is a front view and a side view of an isosceles triangle pair yoke plate of an insulator replacement jig tensile test tool according to a second embodiment of the present application;
fig. 3 is a schematic connection diagram of an insulator replacement fixture tensile test tool applied to a tensile test of an airfoil fixture according to a first embodiment of the present application;
fig. 4 is a schematic connection diagram of an insulator replacement fixture tensile test tool applied to a tensile test of an airfoil fixture according to a second embodiment of the present application;
reference numerals: isosceles triangle yoke plate 1, first connecting hole 11, second connecting hole 12, third connecting hole 13, a pair of large knife fixture connecting holes 14, steel pull rod 2, anti-drop snap ring 21, wing type fixture 3, lead screw connecting hole 31, large knife fixture 4, front clamp 41, rear clamp 42, connecting plate 5, isosceles triangle pair yoke plate 6.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the embodiments of the present application, are within the scope of the embodiments of the present application.
In the description of the embodiments of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in the embodiments of the present application will be understood by those of ordinary skill in the art in a specific context.
A tensile test tool for an insulator replacement jig according to a first embodiment of the present application will be described with reference to fig. 1 to 3.
The embodiment of the application provides a fixture tensile test instrument is changed to insulator, including isosceles triangle yoke plate 1. The isosceles triangle yoke plate 1 is provided with a contour of an isosceles triangle, a first connecting hole 11 is arranged at the vertex angle of the isosceles triangle yoke plate, and a second connecting hole 12 and a third connecting hole 13 are respectively arranged at two bottom corners of the isosceles triangle yoke plate.
The length of the connecting line between the hole centers of the second connecting hole 12 and the third connecting hole 13 is equal to the distance between the screw rod connecting holes 31 on two sides of the wing-shaped clamp 3, so that when the isosceles triangle yoke plate 1 is correspondingly connected with the wing-shaped clamp 3, under the action of tension, the tension received by the two flank edges of the wing-shaped clamp 3 can be parallel to the tension applied to the middle part of the wing-shaped clamp 3 by the pull head of the tension tester, and the tension corresponds to the real stress condition.
When the wing-shaped clamp 3 is specifically connected with the isosceles triangle yoke plate 1, the wing-shaped clamp can be directly connected in a simpler mode such as a middle rope, but the connecting mode is relatively lack in safety, and the bearing tension of the clamp is often very large, some of the clamping is even required to test 5 tons of tension, and the strength of the middle rope also does not meet the test requirement. Therefore, a special steel pull rod 2 can be arranged, the steel pull rod 2 can pass through the screw rod connecting hole 31 of the wing-shaped clamp 3, and the first end of the steel pull rod is provided with an anti-falling clamping ring 21 which is used for clamping the wing-shaped clamp 3 during a tensile test, so that the wing-shaped clamp 3 is connected with the isosceles triangle yoke plate 1 and cannot fall off under the tensile force; the second end may be connected with the second connection hole 12 or the third connection hole 13 of the isosceles triangle link plate 1 at the time of the test.
It should be noted that, in the connection described in the present application, some common connecting members, such as shackles, clamping plates, etc. may be needed for specific connection, and those skilled in the art may select appropriate connecting members to implement connection according to the needs, which is not listed herein.
The above is a detailed description of a tension test tool for an insulator replacement jig, which is provided in the first embodiment of the present application, and may be used for tension test of an airfoil jig. When the wing-shaped clamp is subjected to a tensile test, the screw rod connecting holes at the two side wing edges of the wing-shaped clamp are respectively connected with the second connecting hole and the third connecting hole of the isosceles triangle yoke plate, and then the connecting sleeve lug at the middle part of the wing-shaped clamp is connected with the pull head side of the tensile test machine, and the first connecting hole of the isosceles triangle yoke plate is fixed or connected with the opposite side of the pull head of the tensile test machine, so that the tensile test machine can be started to carry out the tensile test.
Because the distance between the second connecting hole and the third connecting hole of the isosceles triangle yoke plate corresponds to the distance between the screw rod connecting holes on two sides of the wing-shaped clamp, when the tensile force is applied by the tensile testing machine, the stress condition of the wing-shaped clamp is the same as the stress working condition when the actual insulator is replaced, namely the middle part of the wing-shaped clamp is subjected to the tensile force of the outward pull head, and the screw rod connecting holes on two sides are subjected to the counter-tensile force opposite to the tensile force applied by the pull head, so that the tensile test is realized on the basis of simulating the actual stress of the wing-shaped clamp.
The following is an optimization based on the first embodiment, so that the tension test tool for the insulator replacement fixture provided in the first embodiment can be further suitable for the tension test of the large-blade fixture, and can be seen in fig. 2 and fig. 4.
Specifically, a pair of large knife clamp attachment holes 14 may be provided on the isosceles triangle yoke plate 1. For a pair of large knife clamp connecting holes 14, the large knife clamp connecting holes are symmetrically arranged on two sides of a symmetry axis of the isosceles triangle yoke plate 1, and form an isosceles triangle relationship with the first connecting holes 11. Of course, for the pairs of large blade holder connecting holes 14, a plurality of isosceles triangle relations are formed with the first connecting holes 11.
It will be appreciated that the distance between each pair of large blade clamp attachment holes 14 is different so that different gauges of large blade clamp 4 can be accommodated. In this embodiment, two pairs of large knife clamp connecting holes 14 are specifically provided, and of course, large knife clamp connecting holes 14 with different pairs may be provided as required.
The large knife clamp connecting hole 14 can be connected with the bayonet end of the front clamp 41 or the rear clamp 42 of the large knife clamp 4, and a pin matched with the connecting hole can be inserted into the connecting hole of the bayonet end of the front clamp 41 or the rear clamp 42 of the large knife clamp and the isosceles triangle yoke plate 1 during specific connection.
Therefore, when the tension test of the large knife clamp is carried out, two isosceles triangle yoke plates 1 can be utilized, the two sides of the tension tester are respectively connected by the first connecting holes, then the bayonet ends of the front clamp 41 and the rear clamp 42 of the large knife clamp are connected to the isosceles triangle yoke plates 1, and the non-bayonet ends are rigidly connected, so that the actual working condition of the large knife clamp is simulated.
The special isosceles triangle pair yoke plate 6 can also be arranged, and the isosceles triangle pair yoke plate 6 can be specially used for the tensile test of the large knife clamp 4. Likewise, a pull head connecting hole may be provided at the top corner, and a pair of large knife clamp connecting holes 14 may be provided, and the positions of the large knife clamp connecting holes 14 should correspond to the positions of the large knife clamp connecting holes 14 of the isosceles triangle yoke plate 1, so as to adapt to the connection of the bayonet ends of the front clamp 41 or the rear clamp 42 of the large knife clamp.
Considering that in practical application, the front clamp 41 and the rear clamp 42 of the large knife clamp are rigidly connected through the screw assembly and the insulating pull rod at the non-bayonet end, in test, the connecting plate 5 can be arranged for simulating the rigid connection through the screw assembly and the insulating pull rod, and in test, the front clamp and the rear clamp of the large knife clamp are connected.
The above is a detailed description of the tension test tool for the insulator replacement fixture provided in the second embodiment of the present application, and through optimization on the first embodiment, the tension test tool for the insulator replacement fixture can be applicable to the tension test of the wing-type fixture, and also can be applicable to the tension test of the large-blade fixture.
When carrying out the tensile test of big sword fixture, it is noted that, in order to confirm the pulling force that big sword fixture born, need symmetrical all install big sword fixture in isosceles triangle yoke plate and isosceles triangle pair yoke plate symmetry axis's both sides to make the atress of two pairs of big sword fixtures equal, can confirm the pulling force that single pair of big sword fixture born.
Specifically, the connection preparation before the test can be performed according to the following steps when the method is applied, and the following is a large-blade clamp tensile test method provided by the embodiment of the application:
s1: and connecting the first connecting hole of the isosceles triangle connecting plate with one side of the tensile testing machine.
S2: and connecting the pull head connecting hole of the isosceles triangle pair connecting plate with the other side of the tensile testing machine.
S3: and connecting the bayonet end of the front clamp of the first pair of large knife clamps to the large knife clamp connecting hole on one side of the symmetry axis of the isosceles triangle yoke plate.
S4: and the bayonet end of the rear card is connected to the large knife clamp connecting hole at the corresponding position of the isosceles triangle pair connecting plate.
S5: the non-bayonet end of the front card is connected with the non-bayonet end of the rear card through a connecting plate.
S6: and according to the steps S3 to S5, the second pair of large knife clamps are connected to the other side of the symmetry axis of the isosceles triangle yoke plate and the isosceles triangle pair yoke plate.
That is, the second pair of large knife clamps are symmetrically arranged at opposite sides of the first pair of large knife clamps, so that the tensile forces applied to the two pairs of large knife clamps are equal in the tensile test, and the specific value of the tensile force applied to the single pair of large knife clamps in the test can be determined.
S7: and starting the tensile testing machine to carry out tensile test.
The terms "first," "second," "third," "fourth," and the like in the description of the present application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of operation in sequences other than those illustrated or described herein, for example. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that in this application, "at least one" means one or more, and "a plurality" means two or more. "and/or" for describing the association relationship of the association object, the representation may have three relationships, for example, "a and/or B" may represent: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
The above embodiments are merely for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (2)
1. The utility model provides an insulator changes fixture tensile test instrument which characterized in that includes: the device comprises an isosceles triangle yoke plate, two steel pull rods, an isosceles triangle pair yoke plate and a connecting plate, wherein a first connecting hole is formed in the vertex angle of the isosceles triangle yoke plate, a second connecting hole and a third connecting hole are respectively formed in two bottom corners of the isosceles triangle yoke plate, and the length of a connecting line between the second connecting hole and the hole center of the third connecting hole is equal to the distance between screw rod connecting holes on two sides of an airfoil fixture;
the steel pull rod is matched with the screw rod connecting hole of the wing-shaped clamp, the first end of the steel pull rod is provided with an anti-falling clamping ring, and the second end of the steel pull rod can penetrate through the screw rod connecting hole to be connected with the second connecting hole or the third connecting hole in a test;
the isosceles triangle yoke plate is also provided with a pair of large knife clamp connecting holes;
each pair of large knife clamp connecting holes are symmetrically arranged on two sides of a symmetry axis of the isosceles triangle yoke plate and form an isosceles triangle relationship with the first connecting holes;
the corner of the isosceles triangle pair yoke plate is provided with a pull head connecting hole, the isosceles triangle pair yoke plate is also provided with a pair of large knife clamp connecting holes, and the positions of the large knife clamp connecting holes correspond to the positions of the large knife clamp connecting holes of the isosceles triangle yoke plate;
the connecting plate is used for connecting the front clamp and the rear clamp of the large knife clamp in a test;
two pairs of large-cutter clamp connecting holes are specifically formed in the isosceles triangle yoke plate, and the two pairs of large-cutter clamp connecting holes are respectively a first pair of large-cutter clamp connecting holes and a second pair of large-cutter clamp connecting holes.
2. A method of testing a large blade jig in tension, wherein the method of using the insulator replacement jig tension test tool of claim 1 comprises:
s1: connecting a first connecting hole of the isosceles triangle connecting plate with one side of the tensile testing machine;
s2: connecting a pull head connecting hole of the isosceles triangle pair connecting plate with the other side of the tensile testing machine;
s3: connecting the bayonet end of the front clamp of the first pair of large-blade clamps to a large-blade clamp connecting hole on one side of the symmetry axis of the isosceles triangle yoke plate;
s4: connecting the bayonet end of the rear clamp of the first pair of large-blade clamps to the large-blade clamp connecting hole at the corresponding position of the isosceles triangle pair yoke plate;
s5: connecting the non-bayonet end of the front card with the non-bayonet end of the rear card through a connecting plate;
s6: connecting a second pair of large knife clamps on the other side of the symmetry axis of the isosceles triangle yoke plate and the isosceles triangle pair yoke plate according to the same method from S3 to S5;
s7: and starting the tensile testing machine to carry out tensile test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910074433.4A CN109556853B (en) | 2019-01-25 | 2019-01-25 | Clamp tensile test tool is changed to insulator |
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|---|---|---|---|
| CN201910074433.4A CN109556853B (en) | 2019-01-25 | 2019-01-25 | Clamp tensile test tool is changed to insulator |
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| CN109556853B true CN109556853B (en) | 2024-04-16 |
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| CN109946177B (en) * | 2019-04-04 | 2024-05-07 | 广东电网有限责任公司 | Test workpiece and test method for detecting wing-shaped card |
| CN109950831B (en) * | 2019-05-16 | 2024-04-02 | 广东电网有限责任公司 | Large knife clamp tensile test fixture and test method |
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| 500kV线路地线绝缘子更换作业专用工具研制及应用;陶辉映等;《广西电力》;第39卷(第06期);第49-52页 * |
| 输电线路杆塔双串绝缘子更换专用卡具的研制;王先锋;《数字化用户》;第23卷(第040期);第16页 * |
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| CN109556853A (en) | 2019-04-02 |
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