CN109580212B - Cross arm side fixture tensile test instrument - Google Patents
Cross arm side fixture tensile test instrument Download PDFInfo
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- CN109580212B CN109580212B CN201910075493.8A CN201910075493A CN109580212B CN 109580212 B CN109580212 B CN 109580212B CN 201910075493 A CN201910075493 A CN 201910075493A CN 109580212 B CN109580212 B CN 109580212B
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- arm side
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- clamping plate
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- 238000009864 tensile test Methods 0.000 title claims abstract description 62
- 238000012360 testing method Methods 0.000 claims abstract description 36
- 238000009434 installation Methods 0.000 claims abstract description 25
- 239000012212 insulator Substances 0.000 description 9
- 238000009413 insulation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007689 inspection 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
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0033—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining damage, crack or wear
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0075—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by means of external apparatus, e.g. test benches or portable test systems
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The embodiment of the application discloses cross arm side fixture tensile test instrument includes: the fixture installation sleeve is arranged in a hollow mode and is provided with a first end and a second end; the first end of the pull rod can be connected with a pull head of a pull testing machine when a pull test is carried out; the second end of the first clamping plate is provided with a bottom plate perpendicular to the length direction of the first clamping plate, and the first clamping plate and the second clamping plate perpendicular to the bottom plate and symmetrical relative to the axial section of the length direction of the first clamping plate are arranged on the bottom plate; the thickness of the first clamping plate and the second clamping plate is matched with the clamping groove width of the cross arm side clamp; the technical problem that the conventional effective tension test tool special for the side clamps of the cross arm cannot realize the tension test of the side clamps of the cross arm is solved.
Description
Technical Field
The application relates to the technical field of live working, in particular to a tension test tool for a cross arm side fixture.
Background
The cross arm side clamp is an auxiliary tool in live working and is usually used in the replacement of the straight line tower type insulator. The clamping groove of the side clamp of the cross arm is utilized to clamp the side clamp on the cross arm of the tower, the connecting hole of the insulating rod is connected with the insulating rod, the insulating rod is connected with the wire lifting hook, the split conductor is hooked by the wire lifting hook, and the hanging weight of the split conductor is borne. In general, in order to disengage the insulator string from the stress state as much as possible, the replacement operation of the wire lifting hook needs to be completed on both sides of the insulator string.
It can be seen that the cross arm side clamps need to bear the majority of the hanging weight of the split conductors when replacing the insulator string, which needs to be of sufficient strength. However, after long-term use, metal fatigue is most likely to be generated on parts of the cross arm side clamp, cracks or sudden complete fracture can be generated after a certain number of cycles, the risk of personal safety accidents of live working personnel and power grid operation accidents exists, tension tests are urgently needed to be carried out on the cross arm side clamp, however, no effective tension test tool special for the cross arm side clamp exists at present, and the tension test definite inspection of the cross arm side clamp cannot be realized.
Disclosure of Invention
The embodiment of the application provides a cross arm side fixture tensile test instrument, has solved at present not having an effectual tensile test instrument of being exclusively used in cross arm side fixture and has made the tensile test of cross arm side fixture examine the technical problem that can't realize certainly.
In view of this, the first aspect of the present application provides a tension testing tool for a cross arm side clamp, comprising: the fixture installation sleeve is arranged in a hollow mode and is provided with a first end and a second end;
the first end of the pull rod can be connected with a pull head of a pull testing machine when a pull test is carried out;
the second end of the first clamping plate is provided with a bottom plate perpendicular to the length direction of the first clamping plate, and the first clamping plate and the second clamping plate perpendicular to the bottom plate and symmetrical relative to the axial section of the length direction of the first clamping plate are arranged on the bottom plate;
the thickness of the first clamping plate and the second clamping plate is matched with the width of the clamping groove of the cross arm side clamp.
Preferably, the first end of the pull rod is hinged with a pull head of the pull testing machine when the pull test is performed.
Preferably, the first end of the first pin is hinged with a pull head of a tensile testing machine when the tensile testing is carried out, and the first pin specifically comprises:
the first end of the pull head is provided with a pin shaft hole perpendicular to the length direction of the pull head, and the pin shaft hole is matched with an assembly hole of a pull head of the pull force testing machine;
when a tensile test is performed, the first end of the pin shaft hole can be sleeved on a pull head of the tensile test machine, the pin shaft hole coincides with the assembly hole, and a pin shaft is inserted in the pin shaft hole and the assembly hole.
Preferably, the device further comprises a clamping plate, wherein the clamping plate is provided with a bolt hole;
when carrying out tensile test, first cardboard with the equal joint of second cardboard has cross arm side fixture, splint set up the cross arm side fixture keep away from one side of bottom plate, the bolt passes the bolt hole of splint and the fixed orifices of cross arm side fixture with the bottom plate is connected, splint with the bottom plate is common to cross arm side fixture forms the centre gripping.
Preferably, the device also comprises two screw rods;
when carrying out tensile test, first cardboard with the equal joint of second cardboard has cross arm side fixture, the first end of lead screw passes through the insulating rod connecting hole of cross arm side fixture with cross arm side fixture threaded connection.
Preferably, the screw rod driving device further comprises an operation handle, wherein the operation handle can be sleeved on the screw rod to drive the screw rod to rotate.
Preferably, the device further comprises a triangular yoke plate, wherein the triangular yoke plate is provided with a first connecting point, a second connecting point and a third connecting point, and the first connecting point, the second connecting point and the third connecting point are distributed in an isosceles triangle;
the first connecting point is used for being connected with the other end, which is not provided with the pull head, of the tensile testing machine during tensile testing;
the second connecting point and the third connecting point form the bottom edge of the isosceles triangle, and the length of the bottom edge is equal to the distance between the insulating rod connecting holes of the two cross arm side clamps in a tensile test; the second connecting point is used for being connected with the second end of one of the two screw rods in a tensile test, and the third connecting point is used for being connected with the second end of the other screw rod.
Preferably, the first connection point is specifically a first through hole, the second connection point is specifically a second through hole, and the third connection point is specifically a third through hole;
the first through hole is used for being hinged with the other end of the tensile testing machine;
the second through hole is used for being hinged with the second end of one of the two screw rods in a tensile test, and the third connecting point is used for being hinged with the second end of the other screw rod.
From the above technical solutions, the embodiments of the present application have the following advantages:
in the embodiment of the application, a tension test tool for a side clamp of a cross arm is provided, which comprises a clamp installation sleeve, wherein the clamp installation sleeve is arranged in the middle and is provided with a first end and a second end, and the first end can be connected with a pull head of a tension tester during tension test to serve as an output point of tension provided by the tension tester; the second end of the clamping device is provided with a base in the length direction of the clamping device in the vertical period, two clamping plates perpendicular to the base are arranged on the base and are respectively a first clamping plate and a second clamping plate, the two clamping plates are symmetrical relative to the axial section of the clamping device in the length direction of the clamping device installation suite, and the thickness of the first clamping plate and the thickness of the second clamping plate are matched with the width of a clamping groove of the clamping device on the side edge of the cross arm.
When the tension test is carried out on the cross arm side clamp, the first end of the clamp can be connected with the pull head of the tension tester, the second end of the clamp can be clamped on the first clamping plate by utilizing the clamping groove at the inner side of the cross arm side clamp, and the second clamping plate is also clamped with one cross arm side clamp so as to simulate the working condition that the two sides of the insulator string are lifted up in actual live replacement; the outer side of the cross arm side fixture is provided with an insulating rod connecting hole which penetrates through the outer side of the cross arm side fixture, so that the insulating rod connecting hole is used as a force action point, a tensile force opposite to the tensile force of the pull head of the tensile testing machine is applied to the cross arm side fixture, or the cross arm side fixture is directly fixed, and the cross arm side fixture and the pull head of the tensile testing machine form a pair of pull, so that the tensile test of the cross arm side fixture is realized.
Through this dedicated cross arm side fixture tensile test instrument for carry out tensile test to cross arm side fixture and examine certainly and be possible, can realize controlling the quality of cross arm side fixture, in time eliminate the cross arm side fixture that has appeared local permanent accumulation damage because metal fatigue after long-term use, greatly reduced accident's risk.
Drawings
FIG. 1 is a schematic view of a cross arm side fixture in combination with a cross arm side variable fixture according to an embodiment of the present disclosure;
(the thickened wire is a cross arm side clamp in fig. 1);
FIG. 2 is a three view of a clamp mounting kit for a cross arm side clamp pull test tool provided in an embodiment of the present application;
fig. 3 is a schematic view illustrating a part of a triangle yoke plate of a tension test tool for a cross arm side clamp according to an embodiment of the present application.
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.
The cross arm side clamps 6 are usually used in pairs in actual use, because when the insulator string is replaced, in order to make the insulator string as unstressed as possible for convenient replacement, the wires on both sides of the insulator string need to be lifted. The two cross arm side clamps 6 now together bear the overhanging weight of the wire and they each bear approximately half the overhanging weight.
When the tension test is carried out on the cross arm side clamp 6, the data obtained by simulating the stress condition test of the cross arm side clamp in the actual working condition has reference value. The embodiment of the application provides a cross arm side fixture 6 tensile test instrument, when providing suitable installation position for two cross arm side fixtures 6 installation, can also make the atress condition of two cross arm side fixtures 6 in tensile test the same with the in-service use.
A tensile testing tool for the cross arm side clamp 6 according to the embodiment of the present application will be described with reference to fig. 1 to 3.
The tension test tool for the cross arm side clamp 6 comprises a clamp installation sleeve member, wherein the clamp installation sleeve member can be in a cuboid shape with a certain length, for example, can be approximately in a cuboid shape, can be approximately in a cylinder shape, can be theoretically adapted to the technical scheme provided by the application no matter what shape is, but adopts a structure similar to the cuboid in the embodiment provided by the application in consideration of the convenience of casting mould.
The fixture installation kit is hollow, so that cost is saved, and various accessories can be conveniently assembled, for example, at least a space for clamping the cross arm side fixture 6 is reserved. The pull head of the tensile testing machine is provided with a first end and a second end, wherein the first end can be connected with the pull head of the tensile testing machine and is used as a pulling force acting point of the tensile testing machine.
The first end can adopt articulated mode when being connected with the pull head of tensile testing machine, and adjustable margin is big, also makes things convenient for the dismouting. Specifically, the assembly hole of the pull head of the tensile testing machine can be utilized, and the first end of the fixture installation sleeve is provided with a pin shaft hole 4 matched with the assembly hole of the pull head. Because the fixture installation external member is hollow, the fixture installation external member can be set into an external member matched with the external contour of the pull head, and the fixture installation external member is sleeved on the pull head of the tensile testing machine, through simple adjustment, the hole positions of the fixture installation external member and the pull head can be aligned, namely the pin shaft hole 4 is overlapped with the assembly hole, and then a pin shaft prepared in advance is inserted, so that the hinge joint of the fixture installation external member and the pull head is realized.
Of course, other connection modes can be adopted, for example, the fixture mounting sleeve can be in clamping fit with the pull head of the tensile testing machine or can be directly welded together, so that the purpose of the application can be achieved, but the hinge mode is more complex and inconvenient than the hinge mode.
Because the tension test requirement of the cross arm side clamps 6 is very high, for example, the factory standard of some cross arm side clamps 6 is to bear 5 tons of stress, the tension test machine used in the tension test usually needs to adopt an electrohydraulic servo tension test machine, and can be an electrohydraulic servo tension test machine with a horizontal structure.
The second end of the clamping plate is provided with a bottom plate 1 perpendicular to the length direction of the clamping plate, the bottom plate 1 is provided with a first clamping plate 2 and a second clamping plate 3 perpendicular to the bottom plate 1, the two clamping plates are symmetrically arranged on two sides of the axial section of the clamping plate in the length direction, namely, the first clamping plate 2 and the second clamping plate 3 are formed in parallel, the thickness of the two clamping plates is matched with the width of a clamping groove of the cross arm side clamping device 6, and therefore the cross arm side clamping device 6 can be firmly clamped on the first clamping plate 2 or the second clamping plate 3.
Therefore, when the tension test is carried out on the cross arm side clamp 6, the first end of the clamp can be connected with a pull head of a tension tester, the second end of the clamp can be clamped on the first clamping plate 2 by utilizing a clamping groove at the inner side of the cross arm side clamp 6, and the second clamping plate 3 is also clamped with one cross arm side clamp 6 so as to simulate the working condition that the two sides of an insulator string are lifted up in actual live replacement; the outer side of the lateral arm side fixture 6 is provided with an insulation rod connecting hole 61 which penetrates through, so that the insulation rod connecting hole 61 is used as a force action point, a pulling force opposite to the pulling force of the pull head of the tensile testing machine is applied to the lateral arm side fixture 6, or the lateral arm side fixture 6 is directly fixed, and the lateral arm side fixture 6 and the pull head of the tensile testing machine form a pair of pulling force to realize the tensile test on the lateral arm side fixture 6.
In the tensile test, in order to simulate the stress condition of the cross arm side clamp 6 in actual use, the stress at the insulation rod connecting hole 61 of the cross arm side clamp 6 should be opposite to the protruding direction of the clamping plate clamped by the same. For example, in practice, the clamping device 6 on the side of the cross arm is clamped on the side of the cross arm, the side of the cross arm provides an upward supporting force, and the connecting hole 61 of the insulating rod is acted by the downward gravity of the wire, so that in tensile test, the first clamping plate 2 or the second clamping plate 3 is used for replacing the side of the cross arm to provide a supporting force in a certain direction, and the connecting hole 61 of the insulating rod needs to be subjected to a force opposite to the direction.
Two screw rods can be arranged, when a tensile test is carried out, the first clamping plate 2 and the second clamping plate 3 are clamped with the cross arm side clamps 6, the first ends of the screw rods are connected to the insulating rod connecting holes 61 of the cross arm side clamps 6 in a threaded mode, so that the second ends of the screw rods can be fixed, the pull heads are pulled to carry out the test, or the second ends of the screw rods can be applied with force in the opposite direction to the pulling force of the pull heads, and the force is matched with the pull heads to form opposite pulling. The lead screw is obviously more convenient to operate than directly fixing the insulating rod connecting hole 61 or gift on the insulating rod connecting hole 61. It should be noted that the second end of the screw rod may be provided with a connector, which facilitates connection with other devices or components.
Further, an operating handle can be arranged to be matched with the screw rod, the operating handle can be sleeved on the screw rod, the screw rod is conveniently driven to rotate, and the connecting position of the screw rod and the cross arm side clamp 6 is adjusted.
In order to simulate the test more realistically to the actual stress, a triangular yoke plate 7 may be provided, the triangular yoke plate 7 should have a first connection point, a second connection point and a third connection point, the three connection points being distributed substantially in the form of an isosceles triangle. In this way, if a pulling force is applied to the first connection point in the opposite direction to the slider, the pulling force corresponds to two component forces having the same magnitude and the same direction in the second connection point and the third connection point.
During a tensile test, the first connecting point is used for being connected with the other end of the non-pull head of the tensile tester; the second connecting point and the third connecting point are used for being connected with the second end of the screw rod, namely when the second connecting point is connected with the second end of one screw rod, the third connecting point is connected with the second end of the other screw rod.
The second connection point and the third connection point form the bottom edge of an isosceles triangle, and the length of the bottom edge is equal to the distance between the insulation rod connection holes 61 of the two cross arm side clamps 6 in a tensile test, so that when the second connection point and the third connection point are both connected with the second ends of the screw rods, after tensile force is applied, the two screw rods can be parallel, namely, the two screw rods correspond to the vertical downward gravity action received by the cross arm side clamps 6 in actual use.
Specifically, the first connection point, the second connection point, and the third connection point may be a first through hole 71, a second through hole 72, and a third through hole 73, respectively. Thus, the first through hole 71 can be hinged with the other end of the non-pull head of the tensile testing machine through the connecting piece, and the connection of the second through hole 72 and the third through hole 73 can be matched with the connecting piece and the connector at the second end of the screw rod to realize the hinge. Under the action of strong tensile force, the hinge joint is more efficient in force transmission than other connection modes, the connecting piece is not directly stressed, the adjustability is strong, and the hinge joint is most suitable for test requirements.
Further, considering that the clamping groove of the cross arm side clamp 6 is simply utilized to assemble the cross arm side clamp 6 to the clamp installation kit, the cross arm side clamp 6 may not be stable enough under the action of huge tension, the clamp plate 5 may be provided, and the clamp plate 5 is utilized to compress the cross arm side clamp 6 to the bottom plate 1 of the clamp installation kit, or the clamp plate 5 and the bottom plate 1 of the cross arm side clamp 6 jointly form clamping on the cross arm side clamp 6. Specifically, the clamping plate 5 may be provided with bolt holes, and at the same time, the bolt may be connected to the bottom plate 1 of the clamp installation kit by using the fixing holes 62 of the cross arm side variable clamp itself, through the bolt holes of the clamping plate 5 and the fixing holes 62 of the cross arm side variable clamp.
The above is the detailed description of a cross arm side fixture that this application embodiment provided for through this dedicated cross arm side fixture tensile test instrument for carry out tensile test to cross arm side fixture and decide to examine to be possible, can realize the quality to cross arm side fixture and control, in time eliminate because the cross arm side fixture of the permanent accumulation damage of local has appeared owing to metal fatigue after long-term use, greatly reduced accident's risk.
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 (6)
1. The utility model provides a cross arm side fixture tensile test instrument which characterized in that includes: the fixture installation sleeve is arranged in a hollow mode and is provided with a first end and a second end;
the first end of fixture installation external member is connected with the pull head of tensile testing machine when carrying out tensile test, includes: the first end of the fixture installation sleeve member is hinged with a pull head of the tensile testing machine when a tensile test is carried out;
the second end of the fixture installation sleeve is provided with a bottom plate perpendicular to the length direction of the fixture installation sleeve, and the bottom plate is provided with a first clamping plate and a second clamping plate which are perpendicular to the bottom plate and symmetrical relative to the axial section of the bottom plate in the length direction;
the thickness of the first clamping plate and the second clamping plate is matched with the clamping groove width of the cross arm side clamp;
the clamping plate is provided with a bolt hole;
when carrying out tensile test, first cardboard with the equal joint of second cardboard has cross arm side fixture, splint set up the cross arm side fixture keep away from one side of bottom plate, the bolt passes the bolt hole of splint and the fixed orifices of cross arm side fixture with the bottom plate is connected, splint with the bottom plate is common to cross arm side fixture forms the centre gripping.
2. The cross arm side clamp pull test tool of claim 1, wherein the first end of the clamp mounting kit is hinged to a pull head of a pull test machine when performing a pull test, comprising:
the first end of the fixture mounting sleeve is provided with a pin shaft hole perpendicular to the length direction of the fixture mounting sleeve, and the pin shaft hole is matched with an assembly hole of a pull head of the tensile testing machine;
when a tensile test is carried out, the first end of the fixture installation sleeve member is sleeved on a pull head of the tensile test machine, the pin shaft hole coincides with the assembly hole, and the pin shaft hole and the assembly hole are penetrated with pin shafts.
3. The cross arm side clamp pull test tool of claim 1, further comprising two lead screws;
when carrying out tensile test, first cardboard with the equal joint of second cardboard has cross arm side fixture, the first end of lead screw passes through the insulating rod connecting hole of cross arm side fixture with cross arm side fixture threaded connection.
4. The cross arm side clamp pull test tool of claim 3, further comprising an operating handle sleeved on the screw to drive the screw to rotate.
5. The cross arm side clamp tensile testing tool of claim 3, further comprising a triangular yoke plate having a first connection point, a second connection point, and a third connection point, the first connection point, the second connection point, and the third connection point being in isosceles triangle distribution;
the first connecting point is used for being connected with the other end, which is not provided with the pull head, of the tensile testing machine during tensile testing;
the second connecting point and the third connecting point form the bottom edge of the isosceles triangle, and the length of the bottom edge is equal to the distance between the insulating rod connecting holes of the two cross arm side clamps in a tensile test; the second connecting point is used for being connected with the second end of one of the two screw rods in a tensile test, and the third connecting point is used for being connected with the second end of the other screw rod.
6. The cross arm side clamp tensile test tool of claim 5, wherein the first connection point is specifically a first through hole, the second connection point is specifically a second through hole, and the third connection point is specifically a third through hole;
the first through hole is used for being hinged with the other end of the tensile testing machine;
the second through hole is used for being hinged with the second end of one of the two screw rods in a tensile test, and the third connecting point is used for being hinged with the second end of the other screw rod.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910075493.8A CN109580212B (en) | 2019-01-25 | 2019-01-25 | Cross arm side fixture tensile test instrument |
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| CN201910075493.8A CN109580212B (en) | 2019-01-25 | 2019-01-25 | Cross arm side fixture tensile test instrument |
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| CN109580212B true CN109580212B (en) | 2024-02-13 |
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