CN110779807A - Low-temperature tensile test device for wires and cables - Google Patents
Low-temperature tensile test device for wires and cables Download PDFInfo
- Publication number
- CN110779807A CN110779807A CN201911235539.4A CN201911235539A CN110779807A CN 110779807 A CN110779807 A CN 110779807A CN 201911235539 A CN201911235539 A CN 201911235539A CN 110779807 A CN110779807 A CN 110779807A
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- tensile test
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- temperature
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- electric wires
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0228—Low temperature; Cooling means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/028—One dimensional, e.g. filaments, wires, ropes or cables
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to the technical field of electric wires and cables, in particular to a low-temperature tensile test device for electric wires and cables, which comprises a box body arranged in a horizontal structure, wherein a working chamber and an air duct are arranged at the front half part in the box body, a refrigeration assembly and an electrical control assembly are arranged at the rear half part of the box body, an upper tensile test hole is arranged at the center of the top of the working chamber, a lower tensile test hole is arranged at the center of the bottom of the working chamber, the working chamber is connected with the air duct, a multi-wing type circulating fan is arranged at the inner top of the air duct, a temperature sensor, an electric heating wire and a refrigeration economizer are arranged at the lower part of the multi-wing type circulating fan, the refrigeration assembly comprises an evaporator, an electromagnetic valve, a refrigeration compressor, a drying filter and a condenser which are welded through a.
Description
Technical Field
The invention relates to the technical field of wires and cables, in particular to a low-temperature tensile test device for wires and cables. The horizontal low-temperature test box with holes at the bottom and the top of the working room is specially made for detecting the tensile test effect of the electric wire and the cable in the low-temperature environment.
Background
At present, the low-temperature tensile test mode of the wire and the cable mainly comprises a vertical low-temperature test box with a large working chamber and a simple horizontal tensile tester, the whole tensile tester is placed in the low-temperature test box, and tensile force is exerted outside the low-temperature box body through a manual motor or an external motor.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a low-temperature tensile test device for wires and cables, which is specially used when a double-column universal material testing machine needs to be added into a low-temperature environment during material tensile test, and is more convenient when the test is needed.
In order to achieve the purpose, the technical scheme applied by the invention is as follows:
a low-temperature tensile test device for wires and cables comprises a box body which is arranged in a horizontal structure, a working chamber and an air duct are arranged at the front half part in the box body, a refrigeration assembly and an electrical control assembly are arranged at the rear half part of the box body,
an upper stretching test hole is arranged at the center of the top of the working chamber, a lower stretching test hole is arranged at the center of the bottom of the working chamber, the working chamber is connected with an air duct, a multi-wing type circulating fan is arranged at the top in the air duct, a temperature sensor, an electric heating wire and a refrigerating economizer are arranged at the lower part of the multi-wing type circulating fan, a refrigerating assembly comprises an evaporator, an electromagnetic valve, a refrigerating compressor, a drying filter and a condenser which are welded through a copper pipe,
the electric control assembly comprises a circuit breaker, an alternating current contactor, a solid state relay, a transformer and an intermediate relay.
Furthermore, stainless steel flange plates are arranged inside and outside the upper tensile test hole and the lower tensile test hole, and heating wires are arranged around the upper tensile test hole and the lower tensile test hole.
Further, the working chamber and the air duct are each welded from SUS304 stainless steel having a thickness of 1.0 mm.
Furthermore, an operation controller and a human-computer interface are arranged on the side wall of the shell of the box body, and a temperature instrument, a timer and an indication button are arranged on a panel of the human-computer interface.
Further, heat dissipation meshes are arranged below the operation controller and the human-computer interface.
Further, the bottom of the box body is provided with a movable V-shaped pulley.
Furthermore, a glass fiber cotton heat insulation layer is arranged between the shell of the box body and the working chamber.
Furthermore, a box door is arranged right in front of the box body, and an observation window is arranged in the middle of the box door.
Furthermore, the heat preservation layer is filled in the box door, and electric heating wires are distributed in the heat preservation layer.
Further, the outer shell and the box door of the box body are both formed by processing an ordinary A3 steel plate with the thickness of 1.2mm through a numerical control plate shearing and bending machine, and the outer shell of the box body is subjected to acid cleaning and plastic spraying after being manufactured.
The invention has the beneficial effects that:
1) compared with the prior art, the change of the device box body is changed from an upper structure to a lower structure to a left structure and a right structure, so that the device can be better suitable for the tensile testing machines produced in the market, and cables of various specifications and models can be more conveniently installed for testing;
2) compared with the prior art, the working chamber space can be smaller, the working chamber becomes smaller, the corresponding refrigerating capacity is less, the size of the working chamber is more energy-saving compared with the large space, the cooling rate is higher, and the test efficiency is higher.
Drawings
FIG. 1 is a front view of the overall structure of the present invention;
FIG. 2 is a side view of the overall structure of the present invention;
FIG. 3 is a top view of the overall structure of the present invention;
FIG. 4 is a cross-sectional view of the housing of the present invention.
1. A box door; 2. an observation window; 3. a pulley; 4. an upper tensile test hole; 6. a temperature sensor; 7. a working chamber; 8. a lower tensile test hole; 9. an air duct; 10. a multi-wing type circulating fan; 11. an electric heating wire; 12. an evaporator; 13. an electromagnetic valve; 14. a refrigeration compressor; 15. drying the filter; 16. a condenser; 17. a circuit breaker; 18. an AC contactor; 19. a solid state relay; 20. a transformer; 21. an intermediate relay; 22. and (4) a human-computer interface.
Detailed Description
The technical solution of the present invention is described below with reference to the accompanying drawings and examples.
As shown in figures 1 to 4, the low-temperature tensile test device for the electric wire and the cable comprises a box body which is arranged in a horizontal structure, wherein a working chamber 7 and an air duct 9 are arranged at the front half part in the box body, a refrigerating assembly and an electrical control assembly are arranged at the rear half part in the box body, an upper tensile test hole 4 is arranged at the center of the top of the working chamber 7, a lower tensile test hole 8 is arranged at the center of the bottom of the working chamber 7, the upper tensile test hole 4 and the lower tensile test hole 8 are opened to the shell part of the box body, the working chamber 7 is connected with the air duct 9, a multi-wing type circulating fan 10 is arranged at the top in the air duct 9, a temperature sensor 6, an electric heating wire 11 and a refrigerating economizer 12 are arranged at the lower part of the multi-wing type circulating fan 10, the air duct 9 is mainly used for air circulation in the low-temperature test to ensure, The electric control assembly comprises a solenoid valve 13, a refrigeration compressor 14, a dry filter 15 and a condenser 16, and the electric control assembly comprises a circuit breaker 17, an alternating current contactor 18, a solid state relay 19, a transformer 20 and an intermediate relay 21.
In practical application, during low temperature tensile test, install this device on a confession this device nimble removal guide rail frame, bear this device on the guide rail frame and freely slide into corresponding tensile equipment after, the tensile anchor clamps that get off of dismantlement pass this device studio 7 top and the last tensile test hole 4 and the lower tensile test hole 8 of bottom, then after the dress pull back tensile equipment, the cable that needs the test is held to the centre gripping in this device studio 7, just can provide experimental required temperature environment after this device electrical start to finally accomplish the whole set of tensile test of cable.
In practical application, the upper tensile test hole 4 and the lower tensile test hole 8 at the top and the bottom of the working chamber 7 are matched with the tensile test of the tensile tester in a perfect folding mode.
In practical application, the refrigerant circuit after the vacuum pumping of the refrigeration assembly is filled with R404A refrigerant for circulation refrigeration.
More specifically, stainless steel flanges are installed inside and outside the upper tensile test hole 4 and the lower tensile test hole 8, and heating wires are arranged around the upper tensile test hole 4 and the lower tensile test hole 8. Prevent condensation when the device is used in a low-temperature test.
More specifically, the working chamber 7 and the air duct 9 are each welded from SUS304 stainless steel having a thickness of 1.0 mm.
More specifically, an operation controller and a human-computer interface 22 are arranged on the side wall of the outer shell of the box body, and a temperature instrument, a timer and an indication button are arranged on the panel of the human-computer interface 22. The operation controller and the human-machine interface 22 are arranged on the side wall of the shell of the box body, so that the test operation and the temperature setting are convenient.
More specifically, a heat dissipation mesh is arranged below the operation controller and the human-machine interface 22. The heat dissipation effect is achieved.
More specifically, the bottom of the box is provided with a movable V-shaped pulley 3.
More specifically, a glass fiber cotton heat insulation layer is arranged between the shell of the box body and the working chamber 7.
More specifically, a box door 1 is installed right in front of the box body, and an observation window 2 is installed right in the middle of the box door 1.
More specifically, the heat preservation layer filled in the box door 1 is provided with electric heating wires.
More specifically, the outer shell of the box body and the box door 1 are both formed by processing a common A3 steel plate with the thickness of 1.2mm through a numerical control plate shearing and bending machine, and the outer shell of the box body is subjected to acid cleaning and plastic spraying after being manufactured. Has beautiful appearance and no rust.
The working principle of the invention is as follows:
after the low-temperature test device is processed, assembled and molded, a loop of the refrigeration assembly needs a vacuum pump to be in a vacuum state, then R404A refrigerant is filled to reach a certain pressure, after a power supply is switched on, a low-temperature value required by a tensile test is set on a temperature instrument, the low-temperature device starts to operate, the refrigeration assembly starts to operate, 404A refrigerant is compressed to a higher pressure through a refrigeration compressor 14, high-pressure refrigerant is cooled through a condenser 16, the air temperature in an air duct 9 is reduced after the high-pressure refrigerant enters an evaporator 12 in the air duct 9 through a drying filter 15, the cooled refrigerant returns to the refrigeration compressor 14 again, in addition, an electromagnetic valve 13 is used for throttling, and the circulation is repeated to achieve the purpose of cooling.
The air duct 9 in the low-temperature device is characterized in that the multi-wing circulating fan 10 arranged in the low-temperature device forcibly blows cold air in the air duct 9 into the working chamber, and the lower end of the air duct 9 continuously sucks air in the working chamber 7, so that the air in the working chamber 7 is continuously circularly stirred through the air duct 9, and finally, the temperature distribution in the working chamber 7 is uniform, and the deviation is small. When the temperature in the working chamber 7 is about to reach the set temperature value of the instrument, the temperature control instrument outputs a signal to the solid-state relay 19 to control the electric heating wire 11 in the air duct 9, so that the set temperature value is kept to stably run for a long time.
When the low-temperature device reaches a low-temperature environment required by the wire and cable, the device can be driven by a universal material testing machine through an upper stretching hole 4 and a lower stretching hole 8 in a working chamber 7, so that the wire and cable material is subjected to a tensile test in a low-temperature box, and before the test is carried out, the device is required to be placed on a guide rail frame and pushed into a frame type tensile testing machine to complete the tensile test.
While the embodiments of the present invention have been described, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make various modifications without departing from the spirit and scope of the present invention as defined by the appended claims.
Claims (10)
1. The utility model provides a low temperature tensile test device for wire and cable which characterized in that: the box that sets up including horizontal structure, the first half is equipped with studio (7) and wind channel (9) in the box, rear half refrigeration subassembly and electrical control subassembly of box, studio (7) top positive center department is equipped with tensile test hole (4), studio (7) bottom positive center department is equipped with down stretching test hole (8), studio (7) with connect in wind channel (9), multi-wing formula circulating fan (10) are installed at wind channel (9) interior top, temperature sensor (6), electric heating wire (11) and refrigeration festival generator (12) are installed to multi-wing formula circulating fan (10) lower part, refrigeration subassembly includes evaporator (12), solenoid valve (13), refrigeration compressor (14), dry filter (15) and condenser (16) through copper pipe welded, the electrical control subassembly includes temperature control instrument, The circuit breaker (17), alternating current contactor (18), solid state relay (19), transformer (20) and intermediate relay (21).
2. The low-temperature tensile test apparatus for electric wires and cables according to claim 1, wherein: go up the inside and the outside of tensile test hole (4) and tensile test hole (8) down and all install the stainless steel ring flange, go up tensile test hole (4) and be equipped with the heater wire around tensile test hole (8) down.
3. The low-temperature tensile test apparatus for electric wires and cables according to claim 1, wherein: the working chamber (7) and the air duct (9) are both formed by welding SUS304 stainless steel with the thickness of 1.0 mm.
4. The low-temperature tensile test apparatus for electric wires and cables according to claim 1, wherein: an operation controller and a human-computer interface (22) are arranged on the side wall of the shell of the box body, and a temperature instrument, a timer and an indication button are arranged on a panel of the human-computer interface (22).
5. The low-temperature tensile test device for electric wires and cables according to claim 4, wherein: radiating meshes are arranged below the operation controller and the human-computer interface (22).
6. The low-temperature tensile test apparatus for electric wires and cables according to claim 1, wherein: the bottom of the box body is provided with a movable V-shaped pulley (3).
7. The low-temperature tensile test apparatus for electric wires and cables according to claim 1, wherein: and a glass fiber cotton heat-insulating layer is arranged between the shell of the box body and the working chamber (7).
8. The low-temperature tensile test apparatus for electric wires and cables according to claim 1, wherein: a box door (1) is installed right in front of the box body, and an observation window (2) is installed in the middle of the box door (1).
9. The low-temperature tensile test apparatus for electric wires and cables according to claim 8, wherein: the heat preservation layer is filled in the box door (1), and electric heating wires are distributed in the heat preservation layer.
10. The low-temperature tensile test apparatus for electric wires and cables according to claim 8, wherein: the box body is characterized in that the shell and the box door (1) are both formed by processing an A3 steel plate with the thickness of 1.2mm through a numerical control plate shearing and bending machine, and the shell of the box body is subjected to acid cleaning and plastic spraying after being manufactured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911235539.4A CN110779807A (en) | 2019-12-05 | 2019-12-05 | Low-temperature tensile test device for wires and cables |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911235539.4A CN110779807A (en) | 2019-12-05 | 2019-12-05 | Low-temperature tensile test device for wires and cables |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110779807A true CN110779807A (en) | 2020-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911235539.4A Pending CN110779807A (en) | 2019-12-05 | 2019-12-05 | Low-temperature tensile test device for wires and cables |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110779807A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU202740U1 (en) * | 2020-07-24 | 2021-03-03 | федеральное государственное бюджетное образовательное учреждение высшего образования "Нижегородский государственный технический университет им. Р.Е. Алексеева" (НГТУ) | Automated stand for fatigue testing of metals at low temperatures |
| CN114414397A (en) * | 2022-01-14 | 2022-04-29 | 国网内蒙古东部电力有限公司电力科学研究院 | Test box for testing low-temperature mechanical performance of splicing fitting and test method thereof |
| CN114858583A (en) * | 2022-07-05 | 2022-08-05 | 南通市通州区同胜电子电缆有限公司 | Low-temperature stretching detection device for cable processing |
-
2019
- 2019-12-05 CN CN201911235539.4A patent/CN110779807A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU202740U1 (en) * | 2020-07-24 | 2021-03-03 | федеральное государственное бюджетное образовательное учреждение высшего образования "Нижегородский государственный технический университет им. Р.Е. Алексеева" (НГТУ) | Automated stand for fatigue testing of metals at low temperatures |
| CN114414397A (en) * | 2022-01-14 | 2022-04-29 | 国网内蒙古东部电力有限公司电力科学研究院 | Test box for testing low-temperature mechanical performance of splicing fitting and test method thereof |
| CN114858583A (en) * | 2022-07-05 | 2022-08-05 | 南通市通州区同胜电子电缆有限公司 | Low-temperature stretching detection device for cable processing |
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