CN201749063U

CN201749063U - Cable material low-temperature elongation rate testing device

Info

Publication number: CN201749063U
Application number: CN2010202373846U
Authority: CN
Inventors: 程伟; 周光斌
Original assignee: SHANGHAI KAIBO SPECIAL CABLE MATERIAL FACTORY CO Ltd
Current assignee: SHANGHAI KAIBO SPECIAL CABLE MATERIAL FACTORY CO Ltd
Priority date: 2010-06-24
Filing date: 2010-06-24
Publication date: 2011-02-16
Anticipated expiration: 2020-06-24

Abstract

The utility model provides a cable material low-temperature elongation rate testing device. The device comprises an inverted L-shaped frame (1), a cross beam (2), an extension block (3), a locking block (4) and test piece clamping fixtures (5), wherein one end of the cross beam (2) is fixedly connected with the inner side of the vertical side wall of the frame (1), and the other end of the cross beam (2) sequentially passes through the extension block (3) and the locking block (4); the extension block (3) can slide along the cross beam (2); the locking block (4) can be fixed in any position of the cross beam (2); the side wall of the extension block (3) can be in contact with the end part of the transverse lateral side of the frame (1); two test piece clamping fixtures (5) are respectively mounted on the inner side of the vertical side wall of the frame (1) and the side wall of the extension block (3) adjacent to the frame (1); and the mounting heights of the two test piece clamping fixtures (5) are equal. Through verification, the device provided by the utility model has the advantages of high accuracy, simple structure, convenience of testing, and the like.

Description

A kind of CABLE MATERIALS low temperature elongation test device

Technical field

The utility model relates to a kind of CABLE MATERIALS low temperature elongation test device.

Background technology

The cryogenic stretching performance behind the restrictive coating of being extruded into of CABLE MATERIALS begins to become cables manufacturing manufacturer and considers a kind of important performance.Because the low-temperature characteristics of cable sheath material is bad, cracking when often causing cable under low temperature condition, to be laid.At present, the standard of test cable insulation and sheath material low temperature usability has " GB/T 2951.14-2008 cable and optical cable insulation and general test method the 14th part of sheath material: general test method-low-temperature test " and " mensuration of GB T5470-2008 plastic impact method brittle temperature ".These two standards are tested respectively is that cable plastics extrudes into the cryogenic stretching performance behind the sheath and the low temperature impact properties of plastics.At present, cable plastics manufacturer generally assesses the cryogenic property of cable plastics by the low temperature brittleness performance of test cable plastics, the low temperature breaking elongation that cable plastics is extruded into behind the cable cover(ing) is inconvenient to test, and directly the apparatus and method of the cryogenic stretching performance of test cable plastics are also not concrete at present expressly provides.

The utility model content

The purpose of this utility model is to provide a kind of device that can be used to assess the low temperature extensibility of CABLE MATERIALS, to overcome the deficiencies in the prior art.

The utility model is by the following technical solutions for achieving the above object:

A kind of CABLE MATERIALS low temperature elongation test device is characterized in that: comprise inverted L shaped framework 1, crossbeam 2, tension block 3, clamping block 4 and test piece anchor clamps 5; One end of crossbeam 2 is fixedlyed connected with the inboard of the vertical side walls of framework 1; The other end of crossbeam 2 passes tension block 3 and clamping block 4 successively, and tension block 3 can be slided along crossbeam 2, and clamping block 4 can be fixed on the optional position of crossbeam 2, and the sidewall of tension block 3 can contact with the end of the transverse sides of framework 1; Test piece anchor clamps 5 have two and be installed on the inboard of vertical side walls of framework 1 respectively and the sidewall adjacent of tension block 3 with framework 1 on, the setting height(from bottom) of described two test piece anchor clamps 5 is identical.

Further, CABLE MATERIALS low temperature elongation test device of the present utility model also comprises the at the uniform velocity controller that may command tension block 3 is at the uniform velocity slided.

Further, test piece anchor clamps 5 are dumbbell shaped test piece unit clamp.

Further, be respectively equipped with groove on the sidewall adjacent with framework 1 of the inboard of the vertical side walls of inverted L shaped framework 1 and tension block 3, described two test piece anchor clamps 4 are installed on respectively in the described groove.

Further, tension block 3 is inverted L type, and the end of its transverse sides can contact with the end of the transverse sides of framework 1.

Adopt the concrete grammar of the low temperature breaking elongation of the utility model assessment CABLE MATERIALS to be: at a certain temperature, with test piece put into device fixing after, distance between the left hand edge of adjustment clamping block 4 and the right hand edge of tension block 3 is set the extensibility of test, then with clamping block 4 lockings.It is close to clamping block 4 to move tension block 3 with constant speed, test piece is not ruptured after both contact, then represent the breaking elongation of test piece under this temperature greater than this extensibility, so just can judge that whether the breaking elongation of plastics under certain low temperature be greater than a certain numerical value.Checking by experiment, CABLE MATERIALS low temperature elongation test device accuracy of the present utility model is better, and has advantage such as simple in structure, convenient test.

Description of drawings

Fig. 1 is the mobile synoptic diagram of tension block 3 stretchings of the present utility model;

Fig. 2 is the vertical view synoptic diagram of putting in the utility model behind the sample;

Fig. 3 is a sectional view of the present utility model.

Embodiment

Further set forth the utility model below in conjunction with specific embodiment, should be understood that these embodiment only be used to the utility model is described and be not used in the restriction protection domain of the present utility model.

Fig. 1-the 3rd, a kind of preferred implementation synoptic diagram of the present utility model, as shown in the figure: CABLE MATERIALS low temperature elongation test device of the present utility model comprises inverted L shaped framework 1, crossbeam 2, tension block 3, clamping block 4 and test piece anchor clamps 5; One end of crossbeam 2 is fixedlyed connected with the inboard of the vertical side walls of framework 1; The other end of crossbeam 2 passes tension block 3 and clamping block 4 successively, and tension block 3 can be slided along crossbeam 2, and clamping block 4 can be fixed on the optional position of crossbeam 2, and the sidewall of tension block 3 can contact with the end of the transverse sides of framework 1; Test piece anchor clamps 5 have two and be installed on the inboard of vertical side walls of framework 1 respectively and the sidewall adjacent of tension block 3 with framework 1 on, the setting height(from bottom) of described two test piece anchor clamps 5 is identical.

The proving installation of said structure is made by stainless steel material, and inverted L shaped framework 1 and crossbeam 2 link together, and fix, and be not removable.Tension block 3 and clamping block 4 can move along crossbeam 2, and tension block 3 can not rotate with respect to crossbeam 2, and clamping block 4 can be locked on any position of crossbeam 2 on tension block 3 right sides by stationary installations such as bolt, draw-in grooves.

Further, CABLE MATERIALS low temperature elongation test device of the present utility model also comprises the at the uniform velocity controller (not marking among the figure) that may command tension block 3 is at the uniform velocity slided.With at the uniform velocity controller control stretching piece 3 is at the uniform velocity mobile along crossbeam 2 with certain speed.

Further, test piece anchor clamps 5 are dumbbell shaped test piece unit clamp.These test piece anchor clamps and test piece 6 surface of contact are smooth and cover the test piece two end portions fully.

CABLE MATERIALS low temperature elongation test device method of testing of the present utility model is as follows:

1) the ethanol cold-producing medium in the low-temperature impact test instrument is set to temperature to be measured;

2) low temperature extensibility device is proofreaied and correct, and set certain extensibility;

3) treat low-temperature impact test instrument ethanol cold-producing medium arrive temperature to be measured and stable after, low temperature extensibility device is immersed in the ethanol cold-producing medium of low-temperature impact test instrument precooling 10 minutes;

4) take out after the precooling of low temperature extensibility device and rapidly sample to be tested is fixed in the low temperature extensibility device, immerse afterwards in the cooling medium of low-temperature impact test instrument, cool off and in cooling medium, stretch after 3 minutes, long run test is 3 times under same temperature, after the all-pass, think that then the extensibility under this low temperature of sample reaches the numerical value that sets as a result.

Get CABLE MATERIALS A and CABLE MATERIALS B carries out verification experimental verification, test findings is as shown in table 1.

Table 1

In order further to verify the accuracy of this kind test unit and test method, same sample is measured according to " GB/T2951.14-2008 cable and optical cable insulation and general test method the 14th part of sheath material: general test method-low-temperature test ".Its test is carried out having on the common puller system of Cryo Equipment, and Cryo Equipment is cooled off sample by refrigerant gas.Test result is as shown in table 2.

Table 2

From the data of table 1 and table 2 as can be seen, adopt test unit of the present utility model and test method to judge that the low temperature extensibility of CABLE MATERIALS has certain feasibility, accuracy is better.

Claims

1. a CABLE MATERIALS low temperature elongation test device is characterized in that: comprise inverted L shaped framework (1), crossbeam (2), tension block (3), clamping block (4) and test piece anchor clamps (5); One end of crossbeam (2) is fixedlyed connected with the inboard of the vertical side walls of framework 1; The other end of crossbeam (2) passes tension block (3) and clamping block (4) successively, tension block (3) can be slided along crossbeam (2), clamping block (4) can be fixed on the optional position of crossbeam (2), and the sidewall of tension block (3) can contact with the end of the transverse sides of framework (1); Test piece anchor clamps (5) have two and be installed on the inboard of vertical side walls of framework (1) respectively and the sidewall adjacent of tension block (3) with framework (1) on, the setting height(from bottom) of described two test piece anchor clamps (5) is identical.

2. CABLE MATERIALS low temperature elongation test device as claimed in claim 1 is characterized in that: also comprise the at the uniform velocity controller that may command tension block (3) is at the uniform velocity slided.

3. CABLE MATERIALS low temperature elongation test device as claimed in claim 1 is characterized in that: test piece anchor clamps (5) are dumbbell shaped test piece unit clamp.

4. CABLE MATERIALS low temperature elongation test device as claimed in claim 1, it is characterized in that: be respectively equipped with groove on the sidewall adjacent with framework (1) of the inboard of the vertical side walls of inverted L shaped framework (1) and tension block (3), described two test piece anchor clamps (4) are installed on respectively in the described groove.

5. as the described CABLE MATERIALS low temperature of arbitrary claim elongation test device among the claim 1-4, it is characterized in that: tension block (3) is inverted L type, and the end of its transverse sides can contact with the end of the transverse sides of framework (1).