CN209215128U - A kind of constant temperature digital display pitch ductility instrument - Google Patents
A kind of constant temperature digital display pitch ductility instrument Download PDFInfo
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- CN209215128U CN209215128U CN201822080489.4U CN201822080489U CN209215128U CN 209215128 U CN209215128 U CN 209215128U CN 201822080489 U CN201822080489 U CN 201822080489U CN 209215128 U CN209215128 U CN 209215128U
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Abstract
The utility model relates to a kind of constant temperature digital display pitch ductility instrument comprising: container opens up sink on container；Connect the connecting pipe of container；It is set to water tank of the connecting pipe far from container one end；The water pump being set between water tank and connecting pipe；The condenser being set in container；The heater being set in container；It is set in sink, for detecting water level and forming the liquid level sensor of level sensing signal；It is set to bottom in sink, for detecting the temperature sensor of water temperature and formation temperature detection signal in sink；Liquid level sensor is coupled to receive level sensing signal and control the first control circuit of water pump opening and closing；And temperature sensor is coupled to receive temperature detection signal and control the second control circuit of condenser and heater opening and closing.The utility model has automatically controlled water pump, heater, condenser opening and closing, so that Liquid level and water temperature auto-control be made to save the effect that manpower improves ductility testing efficiency.
Description
Technical field
The utility model relates to the technical fields of road building equipment, more particularly, to a kind of constant temperature digital display pitch ductility instrument.
Background technique
Pitch ductility tester is the important equipment for measuring one of pitch three norms and measuring ductility, usually
The development length of pitch indicates, i.e., the pitch of certain geometrical shape and size is placed in the aqueous medium of predetermined temperature with constant speed
It stretches, measures length when breaking and be known as bitumen ductility, indicated with centimetre.
Existing pitch extends tester and needs for asphalt test piece to be placed among the water of constant water temperature, then need it is artificial from
The dynamic water temperature adjusted in sink is controlled after then needing artificial everywhere all to measure again since the sink tested is bigger
Heater or condenser starting processed, not only makes the water temperature in sink control labor intensive, and keep the testing efficiency in sink low.
Utility model content
The purpose of the utility model is to provide a kind of constant temperature digital display pitch ductility instrument, have pitch extending tester
The effect that water temperature is kept constant in container.
The above-mentioned purpose of utility model of the utility model has the technical scheme that
A kind of constant temperature digital display pitch ductility instrument, comprising: container offers on the container, for carrying out pitch
Extend the sink of test；It connects the container and connects the connecting pipe of sink；The connecting pipe is set to far from described
The water tank of container one end；It is set between the water tank and connecting pipe for driving water in the water tank to flow into sink
Water pump；It is set in the container, positioned at the condenser of the bottom of gullet；It is set in the container, positioned at described
The heater of bottom of gullet；It is set in the sink, passed for detecting water level and forming the liquid level of level sensing signal
Sensor；It is set to bottom in the sink, for detecting the temperature sensor of water temperature and formation temperature detection signal in sink；Coupling
The liquid level sensor is connected to receive level sensing signal and control the first control circuit of water pump opening and closing；And it is coupled to
The temperature sensor is to receive temperature detection signal and control the second control circuit of condenser and heater opening and closing.
By using above-mentioned technical proposal, after the liquid level in liquid level sensor detection sink is excessively high, first control circuit
It controls water pump to close, so that the opening and closing of water pump be made to automate, saves manpower, the second control electric power road is exported according to temperature sensor
Temperature opened and closed with controlling heater and condenser, so that heater and condenser be made to heat or drop the water in sink
Temperature is conducive to the efficiency for improving the test of pitch ductility to make water temperature keep constant and save manpower.
The utility model is further arranged to: the first control circuit includes: the first comparing unit, presets liquid level benchmark
It is worth and is coupled to the liquid level sensor to receive level sensing signal and export the first comparison signal；First control unit, coupling
First comparing unit is connected to receive the first comparison signal and export first control signal.
By using above-mentioned technical proposal, when the liquid level of liquid level sensor detection is higher than liquid level a reference value, the first control
Unit controls water pump and closes, to keep the control of water pump simple and save the manpower of control water pump opening and closing.
The utility model is further arranged to: the second control circuit includes: the second comparing unit, preset first temperature
A reference value and be coupled to the temperature sensor with receive temperature detection signal and export the second comparison signal；Third is more single
Member, preset second temperature a reference value and is coupled to the temperature sensor and compares letter to receive temperature detection signal and export third
Number；Second control unit is coupled to second comparing unit to receive the second comparison signal and export second control signal；The
Three control units are coupled to the third comparing unit to receive third comparison signal and export third control signal.
By using above-mentioned technical proposal, when the temperature of temperature sensor detection is higher than the first temperature reference value, then second
Control unit controls condenser starting to cool down to the water in sink, when the temperature of temperature sensor detection is lower than the second temperature
When spending a reference value, then third control unit control heater starting heats up to the water in sink, to make the water in sink
It is maintained within the scope of a stationary temperature.
The utility model is further arranged to: first comparing unit includes: first resistor, the first rheostat and
One comparator；The first resistor is connected with the first rheostat, and the other end of first resistor connects power supply, and first is rheostatic another
One end ground connection；The non-inverting input terminal of the first comparator is coupled to the liquid level sensor；The reverse phase of the first comparator
Input terminal is coupled between the first resistor and the first rheostat；The output end of the first comparator is coupled to described first
Control unit；The first control unit includes: the first triode and the first relay；The base stage coupling of first triode
It is connected to the output end of the first comparator；After the collector of first triode is coupled to the coil of first relay
Connect power supply；The normally-closed contact of first relay is coupled to the current supply circuit of the water pump；The hair of first triode
Emitter grounding.
By using above-mentioned technical proposal, when the liquid level of liquid level sensor detection is higher than liquid level a reference value, level sensing
The voltage value of device output is higher than the voltage value of first resistor device, then first comparator exports high level, then the first triode accesses
It is connected after high level, the normally-closed contact of the first relay disconnects after the coil of the first relay is powered, so that water pump is closed with complete
It is pumped at the water flow of water pump.
The utility model is further arranged to: second comparing unit includes: second resistance, the second rheostat and
Two comparators；The second resistance is connected with the second rheostat, and the second resistance other end connects power supply, and second is rheostatic another
End ground connection；The non-inverting input terminal of second comparator is coupled to the temperature sensor；The reverse phase of second comparator is defeated
Enter end to be coupled between the second resistance and the second rheostat；The output end of second comparator is coupled to second control
Unit processed；Second control unit includes: the second triode and the second relay；The base stage of second triode couples
In the output end of second comparator；The collector of second triode connects after being coupled to the coil of second relay
Connect power supply；The normally opened contact of second relay is coupled to the current supply circuit of the condenser；The hair of second triode
Emitter grounding.
Work as temperature sensor according to the first temperature reference value to adjust the first rheostat by using above-mentioned technical proposal
When detecting water temperature higher than the first temperature reference value, the voltage value of first comparator non-inverting input terminal is higher than the voltage of inverting input terminal
Value, then the first triode ON after first comparator output high level, the normally opened contact closure of the first relay then make condenser
Start to cool down to the water in sink, so that in the constant range of the floods in sink.
The utility model is further arranged to: the third comparing unit includes: 3rd resistor, third rheostat and
Three comparators；The 3rd resistor is connected with the third rheostat, and the other end of the 3rd resistor connects power supply, and described the
Three rheostatic other end ground connection；The non-inverting input terminal of the third comparator is coupled to the 3rd resistor and third variable resistance
Device；The inverting input terminal of the third comparator is coupled to the temperature sensor；The output end of the third comparator couples
In the third control unit；The third control unit includes: third transistor and third relay；Three or three pole
The base stage of pipe is coupled to the output end of the third comparator；The collector of the third transistor is coupled to the third relay
Power supply is connected after the coil of device；The normally opened contact of the third relay is coupled to the current supply circuit of the heater；Described
The emitter of three triodes is grounded.
By using above-mentioned technical proposal, the second rheostatic resistance value is adjusted according to second temperature a reference value, to make the
Two rheostatic voltage values and second temperature a reference value are adapted, when the temperature of temperature sensor detection is lower than second temperature benchmark
Value, then the voltage value of temperature sensor output is higher than the rheostatic voltage value of third, so that third comparator is made to export high level,
It is connected after the base stage access high level of third transistor, the normally opened contact of third relay closes after the coil of third relay is powered
It closes, then heater starting heats up to the water in sink, so that water temperature be made to be maintained within the scope of mobile temperature.
The utility model is further arranged to: the container offers close to the bottom of the sink, is paved with the water
The placing groove of trench bottom is connected on the heater, the heating pipe in the placing groove.
By using above-mentioned technical proposal, it is set in placing groove by heating tube in the sink above placing groove
Water is heated, thus also can be by water temperature in sink, so that the water of sink be made to add in the case where not influencing heater contacts water
Hot simple and insurance
The utility model is further arranged to: the shape of the placing groove is serpentine, and the shape of the heating pipe is
The serpentine to match with placement groove shape.
By using above-mentioned technical proposal, placing groove and heating pipe are all serpentine, and the water energy be conducive in sink is enough equal
It is even heated, to make the even water temperature in sink, in order to carry out pitch ductility test.
In conclusion the advantageous effects of the utility model are as follows:
1. first control circuit controls water pump and closes, to make after the liquid level in liquid level sensor detection sink is excessively high
The opening and closing of water pump automates, and saves manpower, the second control electric power road is according to the temperature that temperature sensor exports to control heater
It is opened and closed with condenser, to make heater and condenser heat or cool down the water in sink, so that water temperature be made to keep permanent
Fixed and saving manpower, is conducive to the efficiency for improving the test of pitch ductility.
Detailed description of the invention
Fig. 1 is the embodiments of the present invention structural schematic diagram；
Fig. 2 is the partial sectional view of the utility model；
Fig. 3 is the circuit diagram of the utility model.
Appended drawing reference: 1, container；11, sink；12, placing groove；13, lid；14, handle；2, connecting pipe；3, water
Case；4, water pump；5, condenser；6, heater；61, heating pipe；7, liquid level sensor；8, temperature sensor；9, the first control
Circuit；91, the first comparing unit；92, first control unit；10, second control circuit；101, the second comparing unit；102,
Three comparing units；103, the second control unit；104, third control unit.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
It referring to Figures 1 and 2, is a kind of constant temperature digital display pitch ductility instrument disclosed by the utility model, including container 1,
Container offers on 1 surface, extend for pitch the sink 11 of test, is provided with lid Heshui slot 11 on container 1
Lid 13, and lid 13 is transparent cover body 13, the handle 14 for lifting lid 13 is fixedly installed on lid 13, in order to grasp
Handle 14 is held to open lid 13 from sink 11, in order to carry out pitch elongation test as personnel.It is arranged on container 1
Have the connecting pipe 2 of connection sink 11, and connecting pipe 2 is connected with water tank 3 far from one end of container 1, and water tank 3 with connect
It is provided with the water pump 4 that water flow in driving water tank 3 is pumped into container 1 between pipeline 2, is taken out the water in water tank 3 by the starting of water pump 4
Enter in sink 11 in order to carrying out pitch ductility test.
Container 1 is internally provided with condenser 5, and condenser 5 is installed on the bottom of sink 11, and is set to entire sink
11 bottoms, in order to cool down to the water in sink 11.Container 1 offers placing groove 12, and placing groove close to 11 bottom of sink
Heater 6 is set at 12 notch, and heater 6 is connected with the heating pipe 61 being set in placing groove 12, and heating pipe 61 is right
Water in sink 11 is heated, so that the water in sink 11 is maintained at a temperature.The shape of placing groove 12 is serpentine device
In container 1, and heating pipe 61 is also arranged in serpentine so that heating pipe 61 is to the water in water pipe with 12 shape of placing groove
It is evenly heated.
As shown in figures 1 and 3, bottom is provided with for detecting liquid level in sink 11 and being formed in the sink 11 of container 1
The liquid level sensor 7 of level sensing signal, model ZH-100 of the liquid level sensor 7 in the present embodiment, the coupling of liquid level sensor 7
Have and receives level sensing signal to receive liquid level sensor 7 and control the first control circuit 9 of the opening and closing of water pump 4.Container 1
The temperature sensor 8 of water temperature and formation temperature detection signal in detection sink 11 is provided in sink 11, temperature sensor 8 is at this
The model PT100 of embodiment, temperature sensor 8 are coupled with to receive temperature detection signal and control heater 6 and condenser 5
The second control circuit 10 of opening and closing.The opening and closing of water pump 4 is controlled by first control circuit 9 to be automatically closed in order to take water pump 4,
The manpower that operator needs the moment to supervise is saved, and second control circuit 10 controls condenser 5 and heater 6 opens and closes, thus
Water temperature is set to be maintained at a temperature range, so that water temperature be made to keep constant.
First control circuit 9 includes: the first comparing unit 91 and first control unit 92, and the first comparing unit 91 is default
Liquid level a reference value and liquid level sensor 7 is coupled to receive level sensing signal and export the first comparison signal, the first control is single
Member 92 is coupled to the first comparing unit 91 to receive the first comparison signal and export first control signal, passes through liquid level sensor 7
The liquid level in sink 11 is detected compared with liquid level a reference value, when the liquid level that liquid level sensor 7 detects is higher than liquid level a reference value, the
One control circuit 9 controls water pump 4 and closes, so that 4 auto-control of water pump, saves manpower.
Second control circuit 10 include: the second comparing unit 101, third control unit 104, third comparing unit 102 with
And third control unit 104,101 preset first temperature a reference value of the second comparing unit and be coupled to temperature sensor 8 with receive
Temperature detection signal simultaneously exports the second comparison signal, and the second control unit 103 is coupled to the second comparing unit 101 to receive second
Comparison signal simultaneously exports second control signal, and the second control unit 103 controls the opening and closing of condenser 5, and third comparing unit 102 is pre-
If second temperature a reference value and being coupled to temperature sensor 8 to receive temperature detection signal and export third comparison signal, third
Control unit 104 is coupled to third comparing unit 102 to receive third comparison signal and export third control signal, third control
The opening and closing of the control heater 6 of unit 104.First temperature reference value is higher than second temperature a reference value, in the first temperature of the present embodiment
A reference value is 50 °C, and second temperature a reference value is 10 °C, so that even water temperature be made to be maintained at 10 °C to 50 °.
First comparing unit 91 includes: first resistor R1, the first rheostat RP1 and first comparator A1, first resistor
R1 connects with the first rheostat RP1, and the other end of first resistor R1 connects power supply, and the other end of the first rheostat RP1 is grounded, the
The non-inverting input terminal of one comparator A1 is coupled to liquid level sensor 7, and the inverting input terminal of first comparator A1 is coupled to the first electricity
It hinders between R1 and the first rheostat RP1, the output end of first comparator A1 is coupled to first control unit 92, first control unit
92 include: the model NPN of the first triode Q1 and the first relay KM1, the first triode Q1, the base of the first triode Q1
Pole is coupled to the output end of first comparator A1, after the collector of the first triode Q1 is coupled to the coil of the first relay KM1
Power supply is connected, the normally-closed contact of the first relay KM1 is coupled to the current supply circuit of water pump 4, and the emitter of the first triode Q1 connects
Ground.The resistance value that the first rheostat RP1 is adjusted according to preset liquid level a reference value, to make the inverting input terminal of first comparator A1
Voltage value match with preset liquid level a reference value.When the liquid level that liquid level sensor 7 detects is higher than liquid level a reference value, liquid level
The voltage value that sensor 7 exports is higher than the voltage value of the first rheostat RP1, then first comparator A1 exports high level, then and first
It is connected after triode Q1 access high level, so that the normally-closed contact of the first relay be made to disconnect, then water pump 4 stops starting to stop
Water stopping trough 11 stops being pumped into water, completes the suction of water.
Second comparing unit 101 includes: second resistance R2, the second rheostat RP2 and the second comparator A2, second resistance
R2 connects with the second rheostat RP2, and the second resistance R2 other end connects power supply, and the other end of the second rheostat RP2 is grounded, and second
The non-inverting input terminal of comparator A2 is coupled to temperature sensor 8, and the inverting input terminal of the second comparator A2 is coupled to second resistance
Between R2 and the second rheostat RP2, the output end of the second comparator A2 is coupled to the second control unit 103, the second control unit
103 include: the model NPN of the second triode Q2 and the second relay KM2, the second triode Q2, the second triode Q2's
Base stage is coupled to the output end of the second comparator A2, and the collector of the second triode Q2 is coupled to the coil of the second relay KM2
After connect power supply, the normally opened contact of the second relay KM2 is coupled to the current supply circuit of condenser 5, the transmitting of the second triode Q2
Pole ground connection.At resistance value according to the first temperature reference value to adjust the second rheostat RP2, to keep the second comparator A2 reverse phase defeated
The voltage value for entering end meets the first temperature reference value, when temperature sensor 8, which detects water temperature, is higher than preset first temperature a reference value,
It is connected after the base stage access high level of second triode Q2, then the second relay KM2 after the coil of the second relay KM2 is powered
Normally opened contact closure, the then starting of condenser 5 cool down to the water in sink 11.
Third comparing unit 102 includes: 3rd resistor R3, third rheostat RP3 and third comparator A3；3rd resistor
R3 connects with third rheostat RP3, and the other end of 3rd resistor R3 connects power supply, the other end ground connection of third rheostat RP3；The
The non-inverting input terminal of three comparator A3 is coupled to 3rd resistor R3 and third rheostat RP3；The anti-phase input of third comparator A3
End is coupled to temperature sensor 8；The output end of third comparator A3 is coupled to third control unit 104；Third control unit 104
It include: third transistor Q3 and third relay KM3；The model NPN type of third transistor, the base stage of third transistor Q3
It is coupled to the output end of third comparator A3；The collector of third transistor Q3 connects after being coupled to the coil of third relay KM3
Connect power supply；The normally opened contact of third relay KM3 is coupled to the current supply circuit of heater 6；The emitter of third transistor Q3 connects
Ground.The resistance value of third rheostat RP3 is adjusted according to second temperature a reference value, to make the voltage value and the of third rheostat RP3
Two temperature reference values match.When the temperature that temperature sensor 8 detects is lower than second temperature a reference value, temperature sensor 8 is defeated
When voltage value out is lower than the voltage value of third rheostat RP3, the second comparator A2 exports high level, then third transistor Q3
It is connected after base stage access high level, then the normally opened contact closure of third transistor Q3 after the coil that third transistor Q3 writes is powered,
The water that then starting of heater 6 starts in sink 11 heats up, thus make water temperature in sink 11 keep 10 °C to 50 °C it
Between.
The implementation principle of the present embodiment are as follows: start the sink 11 that the water in water tank 3 is pumped into container 1 by water pump 4
It pinches, when liquid level sensor 7, which detects the liquid level in sink 11, is higher than liquid level a reference value, the voltage value that liquid level sensor 7 exports is high
After in the voltage value of the first rheostat RP1, then first comparator A1 exports high level, the high electricity of base stage access of the first triode Q1
It is connected after flat, then the normally-closed contact of the first relay disconnects after the coil of the first relay is powered, so that water pump 4 be made to stop continuing
It is pumped into water, is pumped into complete water in sink 11.When temperature sensor 8, which detects water temperature value, is higher than second temperature a reference value,
The voltage value that temperature sensor 8 exports is lower than the voltage value of third rheostat RP3, then third comparator A3 exports high level, the
It is connected after the base stage access high level of three triode Q3, then third relay KM3's is normal after the coil of third relay KM3 is powered
Contact closure is opened, then heater 6, which starts, starts to carry out heat temperature raising to the water in sink 11, when temperature sensor 8 detects sink
Temperature in 11 is higher than preset first temperature reference value, then temperature sensor 8 exports big voltage value higher than the second rheostat RP2
Voltage value, then the second comparator A2 export high level, the second triode Q2 base stage access high level after be connected, the second relay
The normally opened contact closure of the second relay KM2, the then starting of condenser 5 start to the water in sink 11 after the coil of device KM2 is powered
Temperature drop temperature saves manpower so that the water temperature in sink 11 be made to be maintained at constant in one section of temperature.
The embodiment of present embodiment is the preferred embodiment of the utility model, and not limitation is originally practical new according to this
The protection scope of type, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by practical
Within novel protection scope.
Claims (8)
1. a kind of constant temperature digital display pitch ductility instrument characterized by comprising container (1) opens up on the container (1)
Have, extend the sink (11) tested for carrying out pitch；
It connects the container (1) and connects the connecting pipe (2) of sink (11)；
It is set to the water tank (3) of the connecting pipe (2) far from the container (1) one end；
It is set between the water tank (3) and connecting pipe (2) for driving the interior water of the water tank (3) to flow into sink (11)
Water pump (4)；
It is set in the container (1), is located at the condenser (5) of the sink (11) bottom；
It is set in the container (1), is located at the heater (6) of the sink (11) bottom；
It is set in the sink (11), for detecting sink (11) liquid level and forming the liquid level sensor of level sensing signal
(7)；
It is set to the interior bottom of the sink (11), passed for detecting the temperature of sink (11) interior water temperature and formation temperature detection signal
Sensor (8)；
The liquid level sensor (7) is coupled to receive level sensing signal and control the first control circuit of water pump (4) opening and closing
(9)；And
The temperature sensor (8) is coupled to receive temperature detection signal and control condenser (5) and heater (6) opening and closing
Second control circuit (10).
2. a kind of constant temperature digital display pitch ductility instrument according to claim 1, which is characterized in that the first control circuit
(9) include:
First comparing unit (91) presets liquid level a reference value and is coupled to the liquid level sensor (7) to receive level sensing letter
Number and export the first comparison signal；
First control unit (92) is coupled to first comparing unit (91) to receive the first comparison signal and export the first control
Signal processed.
3. a kind of constant temperature digital display pitch ductility instrument according to claim 2, which is characterized in that the second control circuit
(10) include:
Second comparing unit (101), preset first temperature a reference value and be coupled to the temperature sensor (8) with receive temperature inspection
It surveys signal and exports the second comparison signal；
Third comparing unit (102), preset second temperature a reference value and be coupled to the temperature sensor (8) with receive temperature inspection
It surveys signal and exports third comparison signal；
Second control unit (103) is coupled to second comparing unit (101) to receive the second comparison signal and export second
Control signal；
Third control unit (104) is coupled to the third comparing unit (102) to receive third comparison signal and export third
Control signal.
4. a kind of constant temperature digital display pitch ductility instrument according to claim 2, which is characterized in that first comparing unit
It (91) include: first resistor, the first rheostat and first comparator；
The first resistor is connected with the first rheostat, and the other end of first resistor connects power supply, the first rheostatic other end
Ground connection；
The non-inverting input terminal of the first comparator is coupled to the liquid level sensor (7)；
The inverting input terminal of the first comparator is coupled between the first resistor and the first rheostat；
The output end of the first comparator is coupled to the first control unit (92)；
The first control unit (92) includes: the first triode and the first relay；
The base stage of first triode is coupled to the output end of the first comparator；
The collector of first triode connects power supply after being coupled to the coil of first relay；
The normally-closed contact of first relay is coupled to the current supply circuit of the water pump (4)；
The emitter of first triode is grounded.
5. a kind of constant temperature digital display pitch ductility instrument according to claim 3, which is characterized in that second comparing unit
It (101) include: second resistance, the second rheostat and the second comparator；
The second resistance is connected with the second rheostat, and the second resistance other end connects power supply, second rheostatic another termination
Ground；
The non-inverting input terminal of second comparator is coupled to the temperature sensor (8)；
The inverting input terminal of second comparator is coupled between the second resistance and the second rheostat；
The output end of second comparator is coupled to second control unit (103)；
Second control unit (103) includes: the second triode and the second relay；
The base stage of second triode is coupled to the output end of second comparator；
The collector of second triode connects power supply after being coupled to the coil of second relay；
The normally opened contact of second relay is coupled to the current supply circuit of the condenser (5)；
The emitter of second triode is grounded.
6. a kind of constant temperature digital display pitch ductility instrument according to claim 3, which is characterized in that the third comparing unit
It (102) include: 3rd resistor, third rheostat and third comparator；
The 3rd resistor is connected with the third rheostat, and the other end of the 3rd resistor connects power supply, and the third becomes
Hinder the other end ground connection of device；
The non-inverting input terminal of the third comparator is coupled to the 3rd resistor and third rheostat；
The inverting input terminal of the third comparator is coupled to the temperature sensor (8)；
The output end of the third comparator is coupled to the third control unit (104)；
The third control unit (104) includes: third transistor and third relay；
The base stage of the third transistor is coupled to the output end of the third comparator；
The collector of the third transistor connects power supply after being coupled to the coil of the third relay；
The normally opened contact of the third relay is coupled to the current supply circuit of the heater (6)；
The emitter of the third transistor is grounded.
7. a kind of constant temperature digital display pitch ductility instrument according to claim 1, which is characterized in that the container (1) is leaned on
The bottom of the nearly sink (11) offers, is paved with the placing groove (12) of the sink (11) bottom, connects on the heater (6)
The heating pipe (61) for being connected to, being located in the placing groove (12).
8. a kind of constant temperature digital display pitch ductility instrument according to claim 7, which is characterized in that the placing groove (12)
Shape is serpentine, and the shape of the heating pipe (61) is the serpentine to match with placing groove (12) shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822080489.4U CN209215128U (en) | 2018-12-11 | 2018-12-11 | A kind of constant temperature digital display pitch ductility instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822080489.4U CN209215128U (en) | 2018-12-11 | 2018-12-11 | A kind of constant temperature digital display pitch ductility instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209215128U true CN209215128U (en) | 2019-08-06 |
Family
ID=67464190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822080489.4U Active CN209215128U (en) | 2018-12-11 | 2018-12-11 | A kind of constant temperature digital display pitch ductility instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209215128U (en) |
-
2018
- 2018-12-11 CN CN201822080489.4U patent/CN209215128U/en active Active
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