CN219957296U

CN219957296U - Test device

Info

Publication number: CN219957296U
Application number: CN202321620987.8U
Authority: CN
Inventors: 张仲奇; 焦宏所; 张宗军; 赵海燕; 王鹏; 邵继领; 龙海泳; 李影; 王洪祥; 马龙
Original assignee: Tbea Shandong Luneng Taishan Cable Co ltd
Current assignee: Tbea Shandong Luneng Taishan Cable Co ltd
Priority date: 2023-06-25
Filing date: 2023-06-25
Publication date: 2023-11-03
Anticipated expiration: 2033-06-25

Abstract

The utility model provides a testing device, which comprises an insulating wire core and a sheath, wherein the insulating wire core and the sheath are sequentially arranged in a laminating way from inside to outside; stripping a small section of sheath from one end of the high-voltage cable to be detected, stripping a small section of insulating layer on the insulating wire core, and connecting the conductor with the gravity piece through the traction component; the cable was then fixed in the vertical direction by a fixing assembly, the distance moved was measured and recorded daily, and the relationship of static friction to the weight of the cable was calculated from the amount of slip and weight of the weight that had slightly slipped the insulated wire core measured over 5 consecutive days.

Description

Test device

Technical Field

The utility model relates to the technical field of cable testing, in particular to a testing device.

Background

The high-voltage cable bears high voltage and high electric field effect in long-term operation, and the sheath is in clearance fit with the buffer layer, namely under the condition of poor axial contact, the defect on the insulating surface of the cable can generate electric field stress concentration, current is distributed in the trough, but only 1 good contact exists, and gaps of 0.3mm exist between other peaks on two sides and the buffer layer. Since the capacitive current can only flow into the ground through the sheath trough at the contact point, the current density at two points of trough is greatly increased to 2.26×103mA/m2. The capacitive current is concentrated to flow in a close contact position, the phenomenon of uneven current distribution occurs in the shielding layer and the buffer layer of the insulating wire core, the current density is distributed in a periodic double hump mode, particularly in the junction position of the trough of the sheath and the buffer layer, the current density is rapidly increased, the peak value reaches about 448mA/m < 2 >, zero sequence short-circuit current enrichment is caused, intermittent charge enrichment and discharge are carried out, the buffer layer is caused to locally heat, even the melting point of the fluffy surface fiber material of the buffer layer is exceeded, water trees and electricity trees can be generated in the presence of moisture, and the power cable breaks down.

In the prior art, only the contact measurement of the high-voltage cable insulation wire core and the sheath axial gap is judged, the influence of friction force is ignored, namely when the cable is arranged vertically at high fall, the insulation wire core and the sheath slide relatively due to gravity, the defect latency is high, the action range is large, once the cable cannot be locally repaired, the cable can only be replaced in a whole section, and the operation safety of a power grid is seriously influenced; at present, a detection means for the friction force between the insulated wire core and the sheath is lacking.

Therefore, it is necessary to provide a testing device to solve the above technical problems.

Disclosure of Invention

The utility model mainly aims to provide a testing device, which aims to solve the technical problem that the friction force between an insulating wire core and a sheath cannot be effectively measured in the prior art.

The utility model provides a testing device which comprises an insulating wire core and a sheath, wherein the insulating wire core and the sheath are sequentially arranged in a fitting mode from inside to outside, the testing device is used for measuring friction force between the insulating wire core and the sheath, the testing device comprises a fixing frame, a traction assembly, a fixing assembly and a gravity piece, the fixing frame comprises a fixing clamping plate, the fixing assembly is arranged on the fixing clamping plate, the fixing assembly is used for fixing the cable in the vertical direction, one end of the traction assembly is used for being connected with the insulating wire core, the other end of the traction assembly is connected with the gravity piece, and the gravity piece is used for placing weights.

In one embodiment, the fixing assembly comprises a first clamping plate, a second clamping plate and a locking piece, wherein the first clamping plate is provided with a first connecting hole, the second clamping plate is provided with a second connecting hole, the fixing clamping plate is provided with a third connecting hole, and the locking piece is installed in the first connecting hole through the third connecting hole and the second connecting hole in sequence; the first clamping plate is further provided with a first semicircle, the second clamping plate is further provided with a second semicircle, the first semicircle and the second semicircle are oppositely arranged to form a sleeving position, and the sleeving position is used for fixing the sheath.

In an embodiment, the fixing frame further comprises a mounting seat and a measuring ruler, wherein the mounting seat is mounted at the bottom of the fixing clamp plate, the measuring ruler is mounted on the mounting seat along the vertical direction, and the measuring ruler is used for measuring the downward moving distance of the insulating wire core.

In an embodiment, the fixing assembly further comprises a rubber member, one side of the rubber member is attached to the inner wall of the sleeving position, and the other side of the rubber member is attached to the outer wall of the sheath.

In an embodiment, the fixing assembly further comprises an elastic piece, the locking piece comprises a bolt, a nut and a gasket, the bolt sequentially penetrates through the third connecting hole, the second connecting hole and the first connecting hole and stretches out of the first connecting hole, the elastic piece is sleeved on one end of the bolt, which stretches out of the first connecting hole, one end of the elastic piece is abutted to one side, which is away from the second clamping plate, of the first clamping plate, the gasket penetrates through the bolt and is abutted to the other end of the elastic piece, and the nut is installed on the bolt and is abutted to one end, which is away from the elastic piece, of the gasket.

In an embodiment, the traction assembly comprises a traction head and a traction wire, wherein a clamping part is arranged at one end of the traction head, a hanging ring is arranged at the other end of the traction head, the clamping part is used for clamping the insulating wire core, one end of the traction wire is connected with the hanging ring, and the other end of the traction wire is connected with the gravity piece.

In an embodiment, the fixing frame comprises a plurality of upright posts and a plurality of operation platforms, the plurality of upright posts are uniformly distributed along the outline of the operation platform, the plurality of operation platforms are arranged at intervals along the length direction of the upright posts, the plurality of fixing clamping plates are arranged, the number of fixing components is plurality, and the fixing clamping plates are arranged on the operation platforms in a one-to-one correspondence manner; the operation platforms are provided with grooves, and the grooves are used for the cables to pass through.

In an embodiment, the fixing frame further comprises a base and a plurality of pulleys, wherein the bottom ends of the stand columns are all installed on the base, the number of the pulleys is multiple, and the pulleys are evenly installed on one side, away from the stand columns, of the base.

In an embodiment, the fixing frame further comprises a ladder stand, and the ladder stand is distributed along the vertical direction and connected with the side faces of the operation platforms.

In an embodiment, the fixing frame further comprises a push-pull guardrail, a sliding groove is formed in the edge of the operation platform, and the push-pull guardrail is slidably mounted in the sliding groove.

In the scheme, the cable comprises an insulating wire core and a sheath which are sequentially attached from inside to outside, the testing device is used for measuring friction force between the insulating wire core and the sheath, the testing device comprises a fixing frame, a traction assembly, a fixing assembly and a gravity piece, the fixing frame comprises a fixing clamping plate, the fixing assembly is arranged on the fixing clamping plate and used for fixing the cable in the vertical direction, one end of the traction assembly is used for being connected with the insulating wire core, the other end of the traction assembly is connected with the gravity piece, and the gravity piece is used for placing weights; specifically, one end of the high-voltage cable to be detected is stripped by a small section of outer sheath layer and sheath, and the stripping length is 350mm, so that the test is optimal; and then stripping the insulating layer on the insulating wire core by a small section of exposed conductor, wherein the stripping length is 150mm, and the best test is realized. Connecting one end of the traction assembly with the conductor, and connecting the other end of the traction assembly with the gravity piece; then fixing the cable along the vertical direction through a fixing component, and marking the insulated wire core at the crossing electric position of the insulated wire core and the sheath in the initial state; gradually adding weights into the gravity piece in sequence by taking a weight of 20kg as a unit; according to the marking on the insulated wire core, measuring and recording the moving distance every day, observing the weight added to about 200kg between the insulated wire core and the sheath within 5 consecutive days, and stopping applying the weight when the sliding size of the insulated wire core is more than or equal to 15mm to less than or equal to 30mm and less than or equal to H and less than or equal to 30 mm. The friction coefficient and the static friction force of the insulating wire core can be calculated according to the sliding amount of the insulating wire core which is measured in 5 continuous days and the weight of the weight.

The maximum static friction coefficient mu is calculated as follows:

μ＝G/S＝(g ¹ +g ² )/S

wherein: mu is the maximum static friction coefficient, and the unit is N/mm ₂ ；g ₁ The weight of the wire core is kg; g ₂ The unit is kg of the total weight of the weight when the relative sliding does not occur; s is the inner surface area of the sheath, and the unit is mm ² 。

The calculation formula of friction force generated between the insulated wire core and the inner diameter of the sheath on the cable with the length of h meters is as follows:

F＝μR

( Namely: friction = coefficient of friction x normal force to the surface of the friction article )

Wherein F represents friction force, and the unit is kg; mu represents the coefficient of friction in N/mm ₂ The method comprises the steps of carrying out a first treatment on the surface of the R represents the normal force of the surface of the friction object;

the normal force of the friction surface is calculated as follows:

R＝(S/L ₁ )×L÷9.8

the unit is kg, and the gravity acceleration is 9.8N/kg; l represents the height difference length of the cable along the vertical arrangement part, and the unit is m; l (L) ₁ Which is the total length of the high voltage cable.

The decision formula is as follows:

n＝F/G _{total (S)}

From the calculation, the static friction force between the insulated wire core and the sheath in the h meter cable is n times of the self gravity. Namely, when n is more than or equal to 1, the cable can be vertically laid with the height drop of h meters.

When F is more than G, the friction force generated in the cable is enough to offset the gravity of the cable, so that the high drop cable laying construction requirement is met;

when F is smaller than G, the friction force generated in the cable can not counteract the gravity of the cable, so that the insulated wire core slides downwards in the sheath, at the moment, the high-voltage cable structure is required to be adjusted, the friction coefficient is properly reduced or increased in the inner diameter of the sheath, then the test is carried out, and the cable structure meets the requirement until F is larger than G.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings may be obtained from the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of a testing device according to an embodiment of the present utility model;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is a schematic structural view of a fixing assembly according to an embodiment of the present utility model;

fig. 4 is a top view of a testing device according to an embodiment of the utility model.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				1	Fixing frame	11	Fixing splint
111	Third connecting hole	12	Mounting base
				13	Measuring ruler	14	Upright post
15	Operation platform	151	Groove
				152	Safety protection turning plate	16	Safety guard bar
17	Base seat	18	Pulley wheel
				19	Ladder stand	2	Traction assembly
21	Traction head	211	Clamping part
				212	Lifting ring	22	Traction wire
3	Fixing assembly	31	First clamping plate
				311	First connecting hole	312	First semicircle
32	Second clamping plate	321	Second connecting hole
				322	Second semicircle	33	Locking piece
331	Bolt	332	Nut
				333	Gasket	34	Rubber piece
35	Elastic piece	4	Gravity piece
				5	Push-pull guardrail	6	Safety fence
200	Insulated wire core	201	Sheath

The achievement of the object, functional features and advantages of the present utility model will be further described with reference to the drawings in connection with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

Referring to fig. 1 to 4, the utility model provides a testing device, wherein a cable comprises an insulating wire core 200 and a sheath 201 which are sequentially attached from inside to outside, the testing device is used for measuring friction force between the insulating wire core 200 and the sheath 201, the testing device comprises a fixing frame 1, a traction component 2, a fixing component 3 and a gravity piece 4, the fixing frame 1 comprises a fixing clamping plate 11, the fixing component 3 is arranged on the fixing clamping plate 11, the fixing component 3 is used for fixing the cable along the vertical direction, one end of the traction component 2 is used for being connected with the insulating wire core 200, the other end of the traction component 2 is connected with the gravity piece 4, and the gravity piece 4 is used for placing weights; specifically, a small section of the outer sheath layer and the sheath 201 are stripped from one end of the high-voltage cable to be detected, and the stripping length is 350mm, so that the test is optimal; the insulation on the insulated wire core 200 is then stripped to also strip a small length of exposed conductor, with a strip length of 150mm being the best test. Connecting one end of the traction assembly 2 with the conductor, and connecting the other end of the traction assembly 2 with the gravity piece 4; then the cable is fixed in the vertical direction by the fixing component 3, and in the initial state, marks are made on the insulated wire core 200 at the crossing electric position of the insulated wire core 200 and the sheath 201; gradually adding weights into the gravity piece 4 in sequence by taking a weight of 20kg as a unit; according to the marking on the insulated wire core 200, the moving distance is measured every day and recorded, the weight of about 200kg is added between the insulated wire core 200 and the sheath 201 in 5 continuous days, and the application of the weight is stopped when the sliding size of the insulated wire core 200 is more than or equal to 15mm to less than or equal to 30mm and less than or equal to H and less than or equal to 30 mm. The friction coefficient and static friction force of the insulating wire core 200 can be calculated according to the sliding amount of slight sliding of the insulating wire core 200 and the weight of the weight, which are measured in 5 consecutive days.

The maximum static friction coefficient mu is calculated as follows:

μ＝G/S＝(g ₁ +g ₂ )/S

wherein: mu is the maximum static friction coefficient, and the unit is N/mm ² ；g ₁ The weight of the insulated wire core is kg; g ₂ The unit is kg of the total weight of the weight when the relative sliding does not occur; s is the inner surface area of the sheath, and the unit is mm ² 。

The calculation formula of the friction force generated between the insulating wire core 200 and the inner diameter of the sheath 201 is as follows:

F＝μR

the normal force of the friction surface is calculated as follows:

R＝(S/L ₁ )×L÷9.8

the unit is kg, and the gravity acceleration is 9.8N/kg; l represents the height difference length of the cable along the vertical arrangement part, and the unit is m; l (L) ₁ For the length of the cable test section.

The decision formula is as follows:

n＝F/G ₁

wherein G is ₁ ＝G _{Total (S)} ×L，G _{Total (S)} The unit is kg/km for the total weight of the insulated wire core;

For example, 500KV is selected ₁ ×800(F)mm ² The standard cable is tested by taking 3.5 meters and 500KV ₁ ×800(F)mm ² The weight of the standard cable is about 15410kg/km, and the weight of the 3.5 m long insulated wire core is 54kg, then g=54kg+200kg (weight G1) +15kg (weight base weight) =269 kg;

the inner surface area of the sheath of the cable with the length of 3.5 meters is as follows:

S＝π×(d-h)×L ₁ ＝π×(138-6.5)×3500＝1445921.4；

μ＝G/S＝(269×9.8)/1445921.4＝0.0018(N/mm ₂ )；

when the height of the drop is 163m,

according to the formula, f=μr=0.0018× (1445921.4/3.5) ×163++9.8= 12368.4kg;

the dead weight of the insulated wire core of the cable with the length of 163m is as follows:

G ₁ total×l=15410×0.163= 2511.8kg;

and then according to the formula n=f/G ₁ ＝12368.4/2511.8＝4.9；

From the above calculation, it was found that 500KV having a length of 163m was obtained ₁ ×800(F)mm ² The cable has a static friction between the insulated wire core 200 and the sheath 201 that is 4.9 times its own weight. I.e. the static friction between the insulated wire core 200 and the sheath 201 is much greater than the gravity of the insulated wire core 200 itself. Determination of 500KV ₁ ×800(F)mm ² The cable meets the vertical laying length requirement of 163m in the process design.

Further, the test environment is controlled to be 20 ℃ in ambient temperature and 45% in air humidity; the test chamber height space is at least 6.0 meters.

Referring to fig. 3, in one embodiment, the fixing assembly 3 includes a first clamping plate 31, a second clamping plate 32, and a locking member 33, the first clamping plate 31 is provided with a first coupling hole 311, the second clamping plate 32 is provided with a second coupling hole 321, the fixing clamping plate 11 is provided with a third coupling hole 111, and the locking member 33 is mounted to the first coupling hole 311 through the third coupling hole 111 and the second coupling hole 321 in sequence; the first clamping plate 31 is also provided with a first semicircle 312, the second clamping plate 32 is also provided with a second semicircle 322, and the first semicircle 312 and the second semicircle 322 are spliced to form a complete joint, and the joint is used for fixing the sheath 201; when the diameters of the cables are inconsistent, an operator releases the locking piece 33, the first clamping plate 31 is far away from the second clamping plate 32, so that the diameter of the sleeving position is increased until the cables can pass through the sleeving position, then the locking piece 33 is locked to the cables without pressure deformation or pits, the cables are fixed, the cables of each middle type can be guaranteed to be detected according to different cables through the structure, and the application range of the testing device is increased.

Further, the clamping range is the fixed assembly 3 with different specifications, the clamping diameter is 30 mm-160 mm, and the high-voltage corrugated aluminum sleeve cable is suitable for the high-voltage corrugated aluminum sleeve cable and the high-voltage smooth aluminum sleeve cable with the sizes of 110kV, 220kV, 330kV and 500kV being 1X 240 to 1X 3500.

Referring to fig. 1 and 2, in an embodiment, the fixing frame 1 further includes a mounting seat 12 and a measuring ruler 13, the mounting seat 12 is mounted at the bottom of the fixing clamp plate 11, the measuring ruler 13 is mounted on the mounting seat 12 along a vertical direction, and the measuring ruler 13 is used for measuring a downward moving distance of the insulation wire core; the mounting seat 12 is arranged at the stripping position of the outer sheath and the sheath 201 on the testing device, and then the measuring ruler 13 is arranged on the mounting seat 12, so that the measurement is not required to be received every day, and only the data on the measuring ruler 13 is required to be directly read and recorded. Further, the measuring scale 13 is a steel scale with a scale of 300 mm.

Referring to fig. 3, in one embodiment, the fixing assembly 3 further includes a rubber member 34, one side of the rubber member 34 is attached to the inner wall of the socket, and the other side of the rubber member 34 is attached to the outer wall of the sheath 201; through setting up rubber strip and cable outer wall butt, can increase the frictional force of cable, prevent that the cable from sliding from cup jointing the position, prevent simultaneously to damage the cable overcoat when fastening the cable to can play the cushioning effect, the fastening cable is better firm.

Referring to fig. 3, in an embodiment, the fixing assembly 3 further includes an elastic member 35, the locking member 33 includes a bolt 331, a nut 332 and a spacer 333, the bolt 331 sequentially passes through the third connecting hole 111, the second connecting hole 321 and the first connecting hole 311 and extends out of the first connecting hole 311, the elastic member 35 is sleeved at one end of the bolt 331 extending out of the first connecting hole 311, one end of the elastic member 35 abuts against one side of the first clamping plate 31 away from the second clamping plate 32, the spacer 333 passes through the bolt 331 and abuts against the other end of the elastic member 35, and the nut 332 is mounted on the bolt 331 and abuts against one end of the spacer 333 away from the elastic member 35; when the diameter of the socket needs to be reduced, the nut 332 is turned to move the nut 332 close to the first clamping plate 31, the elastic member 35 is compressed, and the first clamping plate 31 is driven to move towards the second clamping plate 32, so that the size of the socket is reduced; when the diameter of the socket needs to be increased, the nut 332 is rotated to enable the nut 332 to move away from the first clamping plate 31, the elastic piece 35 returns to deform, the elastic force of the elastic piece 35 is reduced, and the first clamping plate 31 moves away from the second clamping plate 32, so that the size of the socket is increased; through such a structure, when the size of the socket is required to be adjusted, the size of the hole can be adjusted only by rotating the nut 332, and the first clamping plate 31 or the second clamping plate 32 does not need to be detached first, so that the structure is more convenient and simple to operate.

Further, the fixing assemblies 3 can also disperse the dead weight of the cable and the thermal mechanical force generated by thermal expansion and contraction to each fixing assembly 3 to be released, so that the cable is prevented from being moved due to mechanical damage or other external force.

Further, the zero scale position of the measuring scale 13 coincides with the stripped outer sheath and the end of the sheath 201, and the insulating wire core 200 at the intersection point of the insulating wire core 200 and the sheath 201 is marked as an initial position.

Referring to fig. 1 and 2, in an embodiment, the traction assembly 2 includes a traction head 21 and a traction wire 22, one end of the traction head 21 is provided with a clamping portion 211, the other end of the traction head 21 is provided with a hanging ring 212, the clamping portion 211 is used for clamping the insulated wire core 200, one end of the traction wire 22 is connected with the hanging ring 212, and the other end of the traction wire 22 is connected with the gravity member 4; the insulated wire core 200 is clamped by the clamping part 211, the disassembly after the test is finished and the adjustment at the beginning of the test are convenient by the clamping mode, and more traction wires 22 can be connected by the hanging ring 212, so that the test failure caused by the breakage of the traction wires 22 is prevented.

Further, the weight 4 includes a tray and weights, the weight of the weight is increased by increasing the number of the weights, the size of the tray is 900mm long by 800mm wide by 150mm high, the tray is hung on the traction head 21 through a traction wire 22 of phi 8, and the traction wire 22 is a steel rope.

Further, the total height of the fixing frame 1 is 5 meters, wherein the height of the gravity piece 4 is 0.8 meter; the height of the gravity piece 4 from the ground is 0.5 meter; the highest fixed position of the cable has a ground height of 5.5 meters.

Referring to fig. 1, in an embodiment, a fixing frame 1 includes a plurality of columns 14 and operation platforms 15, the number of operation platforms 15 is plural, the number of columns 14 is plural, the plurality of columns 14 are uniformly distributed along the outline of the operation platform 15, the plurality of operation platforms 15 are arranged at intervals along the length direction of the columns 14, the number of fixing clamping plates 11 is plural, the number of fixing components 3 is plural, and the fixing clamping plates 11 are mounted on the operation platforms 15 and are arranged in a one-to-one correspondence; the plurality of operation platforms 15 are provided with grooves 151, and the grooves 151 are used for allowing cables to pass through the operation platforms 15; the cable is fixed more firmly by arranging the fixing components 3, and meanwhile, the multi-layer operation platform 15 is arranged, so that operators can check each section conveniently, and the distance between the operation platforms 15 is 1 meter.

Further, the operating platform 15 is supported and welded by adopting channel steel with the material of Q355C and the model of 80 multiplied by 43 multiplied by 5mm, the table top of the operating platform 15 is welded by adopting a patterned steel plate with the thickness of 5.0mm and the material of Q235C. The edge of the operation platform 15 is welded with a safety barrier 16, and the safety barrier 16 is welded by adopting phi 25 steel pipes made of Q345B.

Further, a groove 151 is further formed in the operation platform 15 and used for allowing a cable to pass through, a safety protection turning plate 152 is installed at the position of the groove 151, and the safety protection turning plate 152 is used for installing the fixing assembly 3 by personnel.

Referring to fig. 1, in an embodiment, the fixing frame 1 further includes a base 17 and a pulley 18, the bottom ends of the plurality of upright posts 14 are all mounted on the base 17, the number of the pulleys 18 is plural, and the plurality of pulleys 18 are uniformly mounted on one side of the base 17 facing away from the upright posts 14; by providing the pulley 18, the operator can easily push the fixing frame 1 to move to a designated area, and can facilitate the transportation of the testing device.

Further, diagonal bracing supports are welded on the base 17 and the operating platform 15, and are welded by adopting channel steel with the material of Q355C and the model of 100 multiplied by 48 multiplied by 5.3 mm.

Further, a pulley 18 is arranged at each of the four corners of the base 17, and the pulley 18 is an extra-heavy 8-inch rubber flat bottom caster with a brake.

Referring to fig. 1, in an embodiment, the fixing frame 1 further includes a ladder 19, and the ladder 19 is connected to the sides of the plurality of operation platforms 15 in a vertical direction; by providing the ladder 19, the operator can go to each operation platform 15 through the ladder 19.

Further, the outer side of the cat ladder 19 is welded with a safety fence 6, and the straight ladder is welded by adopting Q355C-50X 5mm angle steel; the safety fence 6 is welded by adopting flat iron with the material of A3 and the model of 30 multiplied by 4.71mm, and the main rib of the safety fence 6 is welded by adopting angle steel with the material of Q355C-40 multiplied by 4 mm.

Referring to fig. 4, in an embodiment, the fixing frame 1 further includes a push-pull guardrail 5, a sliding groove is provided at an edge of the operation platform 15, and the push-pull guardrail 5 is slidably mounted in the sliding groove; the safety of operators can be protected through setting up push-and-pull guardrail 5, and the operators just need to push just can make push-and-pull guardrail 5 stretch out through promoting simultaneously, and the operators of being convenient for operate.

The foregoing is only an optional embodiment of the present utility model, and is not intended to limit the scope of the present utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. The utility model provides a testing arrangement, testing arrangement is used for measuring the frictional force between insulating sinle silk and the sheath of cable, its characterized in that, testing arrangement includes mount, traction assembly, fixed subassembly and gravity spare, the mount include fixed splint, fixed subassembly install in fixed splint, fixed subassembly is used for with the sheath is fixed along vertical direction, traction assembly's one end be used for with insulating sinle silk is connected, traction assembly's the other end is connected with gravity spare.

2. The test device of claim 1, wherein the fixing assembly comprises a first clamping plate, a second clamping plate and a locking member, the first clamping plate is provided with a first connecting hole, the second clamping plate is provided with a second connecting hole, the fixing clamping plate is provided with a third connecting hole, and the locking member is mounted in the first connecting hole through the third connecting hole and the second connecting hole in sequence; the first clamping plate is further provided with a first semicircle, the second clamping plate is further provided with a second semicircle, the first semicircle and the second semicircle are oppositely arranged to form a sleeving position, and the sleeving position is used for fixing the sheath.

3. The testing device of claim 1, wherein the fixing frame further comprises a mounting seat and a measuring ruler, the mounting seat is mounted at the bottom of the fixing clamp plate, the measuring ruler is mounted on the mounting seat in the vertical direction, and the measuring ruler is used for measuring the downward moving distance of the insulating wire core.

4. The test device of claim 2, wherein the securing assembly further comprises a rubber member, one side of the rubber member being attached to the inner wall of the socket, and the other side of the rubber member being adapted to be attached to the outer wall of the sheath.

5. The testing device of claim 2, wherein the fixing assembly further comprises an elastic member, the locking member comprises a bolt, a nut and a gasket, the bolt sequentially passes through the third connecting hole, the second connecting hole and the first connecting hole and extends out of the first connecting hole, the elastic member is sleeved at one end of the bolt extending out of the first connecting hole, one end of the elastic member is abutted with one side of the first clamping plate, which is away from the second clamping plate, the gasket passes through the bolt and is abutted with the other end of the elastic member, and the nut is mounted on the bolt and is abutted with one end of the gasket, which is away from the elastic member.

6. The testing device of claim 1, wherein the traction assembly comprises a traction head and a traction wire, one end of the traction head is provided with a clamping portion, the other end of the traction head is provided with a hanging ring, the clamping portion is used for clamping the insulated wire core, one end of the traction wire is connected with the hanging ring, and the other end of the traction wire is connected with the gravity piece.

7. The test device according to any one of claims 1 to 6, wherein the fixing frame comprises a plurality of columns and a plurality of operation platforms, the plurality of columns are uniformly distributed along the outline of the operation platforms, the plurality of operation platforms are arranged at intervals along the length direction of the columns, the plurality of fixing clamping plates are arranged, the plurality of fixing components are arranged, and the fixing clamping plates are arranged on the operation platforms in a one-to-one correspondence manner; the operation platforms are provided with grooves, and the grooves are used for the cables to pass through.

8. The testing device of claim 7, wherein the fixing frame further comprises a base and a plurality of pulleys, wherein the base is provided with bottom ends of the upright posts, the plurality of pulleys are provided, and the plurality of pulleys are provided on one side of the base away from the upright posts.

9. The testing device of claim 7, wherein the mount further comprises a ladder vertically distributed in connection with the sides of the plurality of operating platforms.

10. The test device of claim 7, wherein the mount further comprises a push-pull rail, the edge of the operating platform being provided with a chute, the push-pull rail being slidably mounted in the chute.