CN216869833U - PTC endurance test platform - Google Patents

Abstract

The utility model discloses a PTC durability test bed, which relates to the technical field of PTC detection, in particular to a PTC durability test bed. This PTC endurance test platform is inside putting into sample environment case with the sample to drive the thermocouple through elastic expansion link and compress tightly the sample, through the work of programmable controller control first contactor, second contactor, third contactor, thereby make the sample power-on work, the temperature recorder combines the thermocouple to detect the sample temperature, after the sample degree of inquiry is stable, the temperature recorder feeds back the signal to programmable controller, programmable controller control sample outage, can realize the test to the durable number of times of sample with this circulation.

Description

PTC endurance test platform

Technical Field

The utility model relates to the technical field of PTC detection, in particular to a PTC durability test bed.

Background

PTC means a positive temperature coefficient, and broadly refers to a semiconductor material or device having a large positive temperature coefficient. In general, reference to PTC refers to a positive temperature coefficient thermistor, abbreviated as a PTC thermistor. The application scenes of the PTC are very wide, so the PTC has a considerable market prospect. The circuit protection method is widely applied to circuit protection in the industrial fields of computers, communication, consumer electronics, automobiles, access, digital contents, power supplies, small appliances and the like, and is also applied to the fields of IEEE 802.3, Ethernet LAN IEEE, 1394iLINK, main distribution frame security units, short-distance/internal protection requirements, user terminal equipment, 2Pro module protection of user terminal equipment analog line cards, T1/E1 equipment, ISDN equipment, ADSL equipment, HDSL equipment, MDF module/primary and secondary protection of wired telephone/power splitter cable PBX and button telephone system POS equipment. PTC is classified into: ceramic PTC resistor, organic polymer PTC resistor, thermistor, according to its use difference divide into: the PTC resistor is used for automatic degaussing, the PTC resistor is used for delayed starting, the PTC resistor is used for constant temperature heating, the PTC resistor is used for overcurrent protection, the PTC resistor is used for overheat protection, and the PTC resistor is used for a sensor.

The PTC thermistor is a semiconductor resistor with typical temperature sensitivity, when the temperature exceeds a certain temperature, the resistance value of the semiconductor resistor is increased in a step-like manner along with the increase of the temperature, in order to ensure the qualification of the PTC thermistor, when the PTC thermistor is produced, the PTC thermistor needs to be electrified in a specific environment, and is powered off after the temperature of the PTC thermistor is stabilized, the durability times of the PTC thermistor are tested, the existing test bench is generally equipment for testing the heat resistance and the electrification of the PTC thermistor, and the durability of the PTC thermistor is tested in case of water shortage, so that a PTC durability test bench is provided for solving the problems.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a PTC durability test bed, which solves the problems in the background technology.

In order to achieve the purpose, the utility model is realized by the following technical scheme: the utility model provides a PTC endurance test platform, includes the test bench, the top of test bench is provided with PTC power supply terminal load output terminal, contactor sample connecting terminal, sample zero line connecting terminal, the top fixed mounting of test bench has the adjustable resistance that is located between PTC power supply terminal, the load output terminal, the top fixed mounting of test bench has first contactor, second contactor, the third contactor that is located between load output terminal, the contactor sample connecting terminal, the top fixed mounting of test bench has the sample environment case that is located between contactor sample connecting terminal, the sample zero line connecting terminal, and the side fixed mounting of sample environment case has the temperature recorder, the inside of sample environment case is provided with the thermocouple, the top fixed mounting of test bench has programmable controller.

Preferably, the number of the PTC power supply terminals, the load output terminals, the contactor sample connecting terminals and the sample zero line connecting terminals is at least four, and the positions of the PTC power supply terminals, the load output terminals, the contactor sample connecting terminals and the sample zero line connecting terminals are in one-to-one correspondence.

Preferably, the number of the adjustable resistors is the same as that of the PTC power supply terminals and the load output terminals, and the positions of the adjustable resistors correspond to those of the PTC power supply terminals and the load output terminals one to one.

Preferably, the first contactor, the second contactor and the third contactor are provided with connection points, and the number of the connection points is the same as that of the PTC power supply terminals.

Preferably, the inside fixed mounting of sample environment case has the connecting rod, and the one end fixedly connected with elasticity telescopic link of connecting rod, the bottom fixedly connected with thermocouple of elasticity telescopic link, and thermocouple and temperature recorder electric connection.

Preferably, the bottom of sample environment case inboard is provided with evenly distributed's support column, the support column is located the below of thermocouple, the through wires hole has all been seted up to the left and right sides of sample environment case.

The utility model provides a PTC durability test bed, which has the following beneficial effects:

1. this PTC endurance test platform, put into sample environment incasement portion with the sample, and drive the thermocouple through elastic expansion link and compress tightly the sample, through the work of programmable controller control first contactor, the second contactor, the third contactor, thereby make the sample power-on work, the temperature recorder combines the thermocouple to detect the sample temperature, after the sample degree of inquiry is stable, the temperature recorder feeds back the signal to programmable controller, programmable controller control sample outage, can realize the test to the durable number of times of sample with this circulation, and is simple and convenient to operate, the qualification of PTC thermistor has been guaranteed.

2. According to the PTC durability test bed, the elastic telescopic rod in the sample environment box exerts elastic force on the thermocouple, so that the thermocouple can be in close contact with a sample, the accuracy of the thermocouple for detecting the temperature of the sample is improved, and the test accuracy is further improved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the interior of the sample environmental chamber of the present invention;

FIG. 3 is a schematic structural view of a thermocouple according to the present invention;

fig. 4 is a schematic diagram of the circuit connection structure of the present invention.

In the figure: 1. a PTC power supply terminal; 2. a load output terminal; 3. a contactor sample connection terminal; 4. a sample zero line connecting terminal; 5. a programmable controller; 6. a first contactor; 7. a second contactor; 8. a third contactor; 9. a sample environmental chamber; 10. a temperature recorder; 11. a connecting rod; 12. an elastic telescopic rod; 13. a thermocouple; 14. an adjustable resistor; 15. a test bed.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1 and 4, the present invention provides a technical solution: the utility model provides a PTC endurance test platform, including test bench 15, the top of test bench 15 is provided with PTC power supply terminal 1 load output terminal 2, contactor sample connecting terminal 3, sample zero line connecting terminal 4, contactor sample connecting terminal 3 is the terminal that contactor output links to each other with the sample, better link to each other contactor and rear end sample, more make things convenient for tearing open and trade of sample, sample zero line connecting terminal 4 is the terminal that sample output links to each other with the zero line, make things convenient for tearing open and trade of sample, the top fixed mounting of test bench 15 has the adjustable resistance 14 that is located PTC power supply terminal 1, between load output terminal 2, the top fixed mounting of test bench 15 has the first contactor 6, second contactor 7, third contactor 8 that is located between load output terminal 2, contactor sample connecting terminal 3, the top fixed mounting of test bench 15 has the position that is located contactor sample connecting terminal 3, A sample environment box 9 between the sample zero line connecting terminals 4, a temperature recorder 10 is fixedly arranged on the side surface of the sample environment box 9, a thermocouple 13 is arranged in the sample environment box 9, a programmable controller 5 is fixedly arranged on the top of the test bed 15, the programmable controller 5 carries on-off time control on each sample, and whether the operation is stable or not is also arranged in the sample environment box.

The quantity of PTC power supply terminal 1, load output terminal 2, contactor sample connecting terminal 3, sample zero line connecting terminal 4 is four groups at least, according to the PTC thermistor of different models, sets up multiunit load output terminal 2, contactor sample connecting terminal 3, sample zero line connecting terminal 4, can make things convenient for more succinct installation or change the load, and different electric currents can be adjusted according to the sample model to facility multiunit PTC power supply terminal 1 simultaneously.

And the positions of the PTC power supply terminal 1, the load output terminal 2, the contactor sample connecting terminal 3 and the sample zero line connecting terminal 4 are in one-to-one correspondence, so that the components can be electrically connected according to a circuit diagram.

The quantity of adjustable resistance 14 is the same with PTC power supply terminal 1, load output terminal 2's quantity, according to different parameter requirements, can adjust out required electric current, makes the test more stable, and adjustable resistance 14's position and PTC power supply terminal 1, the position one-to-one of load output terminal 2 are convenient for be connected adjustable resistance 14 and PTC power supply terminal 1, load output terminal 2 through the connecting wire.

The first contactor 6, the second contactor 7 and the third contactor 8 are all provided with connecting points, the number of the connecting points is the same as that of the PTC power supply terminals 1, the first contactor 6, the second contactor 7 and the third contactor 8 mainly have the functions of receiving signals transmitted by the programmable controller 5, electrifying and cutting off the power of each main loop according to signal instructions, so as to realize electrifying and cutting off the power of samples,

referring to fig. 2 and 3, a connecting rod 11 is fixedly mounted inside the sample environment box 9, one end of the connecting rod 11 is fixedly connected with an elastic telescopic rod 12, a thermocouple 13 is fixedly connected to the bottom end of the elastic telescopic rod 12, and the thermocouple 13 is electrically connected with the temperature recorder 10, so that the thermocouple 13 can be in close contact with a sample by applying an elastic force to the thermocouple 13 through the elastic telescopic rod 12 inside the sample environment box 9, the accuracy of the thermocouple 13 in detecting the temperature of the sample is improved, and the accuracy of the test is further improved.

The inboard bottom of sample environment case 9 is provided with evenly distributed's support column, and it is built on stilts with the sample through the support column, and the sample of being convenient for dispels the heat fast after the outage, and the theory of use and the working process of sample environment case 9 all are the same with prior art, do not do here and describe repeatedly.

The support column is located the below of thermocouple 13, and the through wires hole has all been seted up to the left and right sides of sample environment case 9, is convenient for along the through wires hole with sample and contactor sample connecting terminal 3, sample zero line connecting terminal 4 electric connection.

In conclusion, when the PTC durability test bed is used, according to the type of the PTC thermistor, a proper PTC power supply terminal 1, a load output terminal 2, a contactor sample connecting terminal 3 and a sample zero line connecting terminal 4 are selected to work, a first contactor 6, a second contactor 7 or a third contactor 8 at a proper position is selected to work, the PTC thermistor sample is placed above a supporting column at the inner side of a sample environment box 9, an elastic telescopic rod 12 is used for applying elasticity to a thermocouple 13, the thermocouple 13 is enabled to tightly support the sample, all components are connected according to the circuit of FIG. 4, the internal temperature of the sample environment box 9 is adjusted according to test requirements, a programmable controller 5 is used for controlling the corresponding contactor to be opened, the sample is electrified, a temperature recorder 10 is used for detecting the temperature of the PTC thermistor sample in cooperation with the thermocouple 13, and after the temperature of the PTC thermistor sample is stabilized, the temperature recorder 10 feeds back signals to the programmable controller 5, the programmable controller 5 controls the corresponding contactor to be closed, the power of the sample is controlled to be cut off, the temperature recorder 10 and the thermocouple 13 are combined to continuously detect the temperature of the PTC thermistor sample, when the temperature of the sample is reduced to be lower than 30 ℃, the temperature recorder 10 feeds back the signals to the programmable controller 5, the programmable controller 5 controls the sample to be electrified again for testing, and the test is performed in sequence and circulation to achieve the purpose of testing the durability of the PTC thermistor sample.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, 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; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. A PTC endurance test platform, includes test bench (15), its characterized in that: the testing device is characterized in that a PTC power supply terminal (1), a load output terminal (2), a contactor sample connecting terminal (3) and a sample zero line connecting terminal (4) are arranged at the top of the testing table (15), an adjustable resistor (14) located between the PTC power supply terminal (1) and the load output terminal (2) is fixedly arranged at the top of the testing table (15), a first contactor (6), a second contactor (7) and a third contactor (8) located between the load output terminal (2) and the contactor sample connecting terminal (3) are fixedly arranged at the top of the testing table (15), a sample environment box (9) located between the contactor sample connecting terminal (3) and the sample zero line connecting terminal (4) is fixedly arranged at the top of the testing table (15), a temperature recorder (10) is fixedly arranged on the side face of the sample environment box (9), a thermocouple (13) is arranged inside the sample environment box (9), and a programmable controller (5) is fixedly mounted at the top of the test bed (15).

2. A PTC durability test stand according to claim 1, wherein: the quantity of PTC power supply terminal (1), load output terminal (2), contactor sample connecting terminal (3), sample zero line connecting terminal (4) is four groups at least, and the position one-to-one of PTC power supply terminal (1), load output terminal (2), contactor sample connecting terminal (3), sample zero line connecting terminal (4).

3. A PTC durability test stand according to claim 1, wherein: the number of the adjustable resistors (14) is the same as that of the PTC power supply terminals (1) and the load output terminals (2), and the positions of the adjustable resistors (14) correspond to the positions of the PTC power supply terminals (1) and the positions of the load output terminals (2) one by one.

4. A PTC durability test stand according to claim 1, wherein: all be provided with the tie point on first contactor (6), second contactor (7), the third contactor (8), and the quantity of tie point is the same with the quantity of PTC power supply terminal (1).

5. A PTC durability test stand according to claim 1, wherein: the inside fixed mounting of sample environment case (9) has connecting rod (11), and the one end fixedly connected with elasticity telescopic link (12) of connecting rod (11), the bottom fixedly connected with thermocouple (13) of elasticity telescopic link (12), and thermocouple (13) and temperature recorder (10) electric connection.

6. A PTC durability test stand according to claim 5, characterized in that: the bottom of sample environment case (9) inboard is provided with evenly distributed's support column, the support column is located the below of thermocouple (13), the through wires hole has all been seted up to the left and right sides of sample environment case (9).

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