Special device for thermal extension test

Abstract

The utility model discloses a special device for a thermal extension test, which belongs to the technical field of thermal extension test devices and comprises a support body, a movable hook piece is hung on a cantilever frame of the support body, an upper non-self-tightening clamp is hung at the lower end of the hook piece, a cross-linked polyethylene insulated pipe fitting is clamped on the upper non-self-tightening clamp, and the cross-linked polyethylene insulated pipe fitting is clamped on the cross-linked polyethylene insulated pipe fitting. A lower non-self-tightening clamp is clamped at the lower end of the cross-linked polyethylene insulating pipe fitting, soft cushions are fixedly connected to the inner walls of two groups of clamping plates of the upper non-self-tightening clamp and the lower non-self-tightening clamp, and an open type hanging ring is hung at the lower end of the lower non-self-tightening clamp. According to the utility model, the bracket body and the movable hook piece are arranged, the hanging bracket capable of being flexibly adjusted is adopted, a plurality of samples can be simultaneously tested, the upper non-self-tightening clamp, the lower non-self-tightening clamp and the soft cushion are arranged, and the non-self-tightening silicon rubber cushion clamp is adopted, so that the phenomenon that the samples slip or are broken due to non-uniform clamping force is avoided, and the operation is simpler and more convenient; and the test efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat extension test device technical field, concretely is a kind of special device for heat extension test. BACKGROUND

[0002] Crosslinked polyethylene insulated power cable has been widely applied in power system, with the rapid development of infrastructure construction, the demand of power cable is increasing, in order to ensure that its quality and performance meet the standard requirements, heat extension test needs to be carried out, heat extension test is an important test method for evaluating the deformation resistance of crosslinked polyethylene insulation material at high temperature, in the test process, sample needs to be clamped and fixed on fixture device, placed in oven, and heated for a certain time under specified temperature and negative load, whether the elongation of sample meets the standard requirements is measured, in heat extension test, the device used cooperatively is very important.

[0003] In prior art, the fixture and support of traditional device are fixed and cannot be flexibly adjusted, ordinary heat extension test device can basically test only three samples at a time, and test efficiency is low;Secondly, the fixture is self-tightening type and needs to be manually twisted and fixed, and the inner side of the fixture is without non-metallic protective pad, the clamping force of the fixture is uneven, which can easily lead to sample slipping or clamping off in the test process. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of special device for heat extension test to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of special device for heat extension test, including support body, movable hook piece is hung on the suspender frame of the support body, the lower end of hook piece is hung with upper non-self-tightening type clamp, crosslinked polyethylene insulation pipe is clamped on the upper non-self-tightening type clamp, the lower end of crosslinked polyethylene insulation pipe is clamped with lower non-self-tightening type clamp, the inner wall of the two sets of clamping plates of upper non-self-tightening type clamp and lower non-self-tightening type clamp is fixedly connected with soft pad, the lower end of lower non-self-tightening type clamp is hung with open type's ring, and the ring is penetrated with weight piece.

[0006] As a further scheme of the utility model: wherein, the side wall of the two sets of clamping plates of upper non-self-tightening type clamp and lower non-self-tightening type clamp is equipped with through hole, screw is inserted in through hole, the side wall of soft pad is equipped with thread groove matched with screw, one end of screw is threadedly connected with thread groove, and the other end of screw is threadedly connected with nut.

[0007] As a further scheme of the utility model: wherein, the support body is formed by welding fixing of rectangular frame bottom plate and concave frame of stainless steel material.

[0008] As a further scheme of the utility model: wherein, the upper non self-tightening clamp and the lower non self-tightening clamp are both non self-tightening stainless steel clamps.

[0009] As a further scheme of the utility model: wherein, the soft pad is the long strip structure matched with the clamping plate side surface of the upper non self-tightening clamp or the lower non self-tightening clamp, and the soft pad adopts the 2mm thick silicone rubber material of 200 DEG C high temperature resistance.

[0010] As a further scheme of the utility model: wherein, the hook piece is arranged in the " 5 " type structure, and the hook piece adopts the stainless steel material.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] 1、The utility model discloses a hanging support, which comprises a support body and a movable hook piece, and the hanging support can be flexibly adjusted.

[0013] 2、The utility model discloses a hanging support, which comprises a support body and a movable hook piece, and the hanging support can be flexibly adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0015] Figure 2 It is the three-dimensional structure schematic diagram of the utility model; Figure 1 It is the A place enlarged structure schematic diagram of the utility model;

[0016] Figure 3 It is the front view structure schematic diagram of the utility model;

[0017] Figure 4 It is the side view sectional structure schematic diagram of the utility model.

[0018] The corresponding relationship between the annotations of each drawing and the component names in the drawing is as follows:

[0019] 1、The support body;2、The hook piece;3、The upper non self-tightening clamp;4、The crosslinked polyethylene insulating pipe fitting;5、The lower non self-tightening clamp;6、The soft pad;7、The hanging ring;8、The weight piece;9、The screw;10、The nut. DETAILED DESCRIPTION

[0020] Please refer to Figures 1 to 4The utility model discloses a special device for heat extension test, the device is used with oven, including support body 1, the movable hook piece 2 of hanging is equipped on the suspender frame of support body 1, adopt the flexible adjustment's suspension support, can according to actual test demand to multiple crosslinked polyethylene insulation pipe fittings 4 carry out heat extension test simultaneously, the scope of application is wider, the lower end of multiple hook piece 2 is hung and is provided with upper non self -tightening type clamp 3, and the crosslinked polyethylene insulation pipe fittings 4 are clamped on upper non self -tightening type clamp 3, and the lower end of crosslinked polyethylene insulation pipe fittings 4 is clamped and is provided with lower non self -tightening type clamp 5, and clamping is convenient, improves work efficiency, and stress is evenly distributed, and the inner wall of the two sets of clamping plates of upper non self -tightening type clamp 3 and lower non self -tightening type clamp 5 is fixedly connected with soft pad 6, avoids the sample slip or clamping breakage caused by uneven clamping force, and the lower end of lower non self -tightening type clamp 5 is hung and is provided with the open type's ring 7, and the weight piece 8 is threaded on ring 7, respectively using upper non self -tightening type clamp 3 and lower non self -tightening type clamp 5 clamps the both ends of crosslinked polyethylene insulation pipe fittings 4 during test, the hook piece 2 on the suspender frame of support body 1 is hung with upper non self -tightening type clamp 3, then place in the oven, utilize the gravity of weight piece 8, to test the heat extension test of crosslinked polyethylene insulation pipe fittings 4, simple and convenient operation, greatly improve test efficiency.

[0021] As Figure 2 The side wall of the two sets of clamping plates of upper non self -tightening type clamp 3 and lower non self -tightening type clamp 5 is provided with a through hole, a screw 9 is inserted in the through hole, a screw thread groove matched with the screw 9 is formed in the side wall of the soft pad 6, one end of the screw 9 is in screw connection with the screw thread groove, and the other end of the screw 9 is in screw connection with a nut 10, so that the soft pad 6 can be conveniently disassembled and replaced.

[0022] As Figure 1 The support body 1 is formed by welding a rectangular frame bottom plate and a concave frame made of stainless steel, so that the structure is simple and stable.

[0023] As Figure 1 And Figure 2 The upper non self -tightening type clamp 3 and the lower non self -tightening type clamp 5 are both non self -tightening type stainless steel clamps, so that clamping is convenient, stress is evenly distributed, the clamps are resistant to high temperature and corrosion, and have a long service life.

[0024] As Figure 2 The soft pad 6 has a strip-shaped structure matched with the clamping plate side surface of the upper non self -tightening type clamp 3 or the lower non self -tightening type clamp 5, so that clamping is more stable, the soft pad 6 is made of silicon rubber material with a thickness of 2 mm and resistant to high temperature of 200 DEG C, so as to be suitable for heat extension test of crosslinked polyethylene insulation pipe fittings.

[0025] As Figure 2 The hook piece 2 has a "5" shaped structure, so that the hook piece 2 is convenient and stable to hang, and the hook piece 2 is made of stainless steel, so that the hook piece 2 has a long service life.

[0026] Working principle: when using the device to crosslinked polyethylene insulated pipe 4 heat extension test, test respectively using the upper non self-tight clamp 3 and the lower non self-tight clamp 5 clamping crosslinked polyethylene insulated pipe 4 two ends, the upper non self-tight clamp 3 hang on the hook piece 2 on the support body 1 can, then placed in the oven, using the weight of the weight piece 8, to test the crosslinked polyethylene insulated pipe 4 heat extension test, simple and convenient operation, greatly improve the test efficiency.

[0027] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art within the technical range disclosed by the present application, according to the technical scheme and the utility model concept of the present application, equivalent replacement or change, should be covered in the protection scope of the present application.

Claims

1. A special device for heat stretching testing, comprising a support body (1), characterized in that, The bracket (1) has a movable hook (2) hanging on its suspension beam. The lower end of the hook (2) is fitted with an upper non-self-tightening clamp (3). The upper non-self-tightening clamp (3) holds a cross-linked polyethylene insulating pipe (4). The lower end of the cross-linked polyethylene insulating pipe (4) holds a lower non-self-tightening clamp (5). The inner walls of the two sets of clamps of the upper non-self-tightening clamp (3) and the lower non-self-tightening clamp (5) are fixedly connected with soft pads (6). The lower end of the lower non-self-tightening clamp (5) is fitted with an open hanging ring (7). A weight (8) is threaded through the hanging ring (7).

2. The special device for heat stretching test according to claim 1, characterized in that, The side walls of the two sets of clamps of the upper non-self-tightening clamp (3) and the lower non-self-tightening clamp (5) are provided with through holes, and screws (9) are inserted into the through holes. The side wall of the soft pad (6) is provided with a threaded groove that matches the screw (9). One end of the screw (9) is threadedly connected to the threaded groove, and the other end of the screw (9) is threadedly connected to a nut (10).

3. The special device for heat stretching test according to claim 1, characterized in that, The support body (1) is formed by welding and fixing a rectangular frame base plate made of stainless steel and a concave frame.

4. The special device for heat stretching test according to claim 1, characterized in that, Both the upper non-self-tightening clip (3) and the lower non-self-tightening clip (5) are non-self-tightening stainless steel clips.

5. The special device for heat stretching test according to claim 1, characterized in that, The pad (6) is a long strip structure that matches the side of the clamp plate of the upper non-self-tightening clamp (3) or the lower non-self-tightening clamp (5). The pad (6) is made of silicone rubber material that can withstand high temperatures of 200℃ and is 2mm thick.

6. The special device for heat stretching test according to claim 1, characterized in that, The hook (2) is arranged in a "5" shape and is made of stainless steel.

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