CN210864438U - Temperature control system of precoated sand core shooter - Google Patents
Temperature control system of precoated sand core shooter Download PDFInfo
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- CN210864438U CN210864438U CN202020084539.0U CN202020084539U CN210864438U CN 210864438 U CN210864438 U CN 210864438U CN 202020084539 U CN202020084539 U CN 202020084539U CN 210864438 U CN210864438 U CN 210864438U
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Abstract
The utility model discloses a tectorial membrane sand core shooter temperature control system, including setting up temperature sensor and the cooling device in the shooting subassembly inside, still include the temperature monitoring subassembly, the temperature monitoring subassembly includes signal amplification circuit, integral filter circuit and the controller that connects gradually, and temperature sensor's signal output part is connected to the input of signal amplification circuit, and the controller is used for the operating condition of drive control cooling device, the utility model discloses a temperature sensor real-time detection shoots the inside temperature of subassembly, and its detected signal sends into signal amplification circuit at first and amplifies, and the external high frequency clutter interference in the preliminary filtering temperature detection process guarantees the precision that the temperature detected signal was amplified; the integral filter circuit has an integral effect on the amplification of the detection signal, so that the phase of the signal is adjusted, the stability of the output waveform of the temperature detection signal is ensured, the accuracy of temperature detection is greatly improved, and the system deviation is avoided.
Description
Technical Field
The utility model relates to a tectorial membrane sand core shooting machine technical field especially relates to tectorial membrane sand core shooting machine temperature control system.
Background
The existing core shooter is suitable for a hot core box and a cold core box, the working principle of the core shooter is that a core sand mixture which takes liquid or solid thermosetting resin as a binder is shot into the heated core box, the sand core is quickly hardened when heated in the core box, and the sand core is taken out when the sand core is solidified to a certain degree, so that a high-quality sand core finished product with smooth surface and accurate size is formed.
When the hot core box is used for manufacturing a core, the temperature of the hot core box is 140-300 ℃, the core shooter is positioned above the hot core box during core manufacturing, so that the bottom of the sand shooting hopper is easy to heat up, and for green sand prepared from precoated sand with a low melting point and water-based inorganic binder, the heat radiation or heat conduction received by the bottom of the sand shooting hopper can obviously cause the service performance of the sand, so that the problems of blockage of a core manufacturing sand shooting nozzle, sand shooting incompleteness and the like can be caused. In view of the above, in the existing precoated sand core shooter, the cooling assembly is mounted on the sand shooting assembly, so that the temperature in the sand shooting assembly is kept constant, and the precoated sand in the sand shooting assembly is in an environment with constant temperature.
So the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
To the above situation, in order to overcome the defects of the prior art, the present invention is directed to a temperature control system for a precoated sand core shooter.
The technical scheme for solving the problem is as follows: the temperature control system of the precoated sand core shooter comprises a temperature sensor and a cooling device which are arranged inside a sand shooting assembly, and further comprises a temperature monitoring assembly, wherein the temperature monitoring assembly comprises a signal amplifying circuit, an integral filter circuit and a controller which are sequentially connected, the input end of the signal amplifying circuit is connected with the signal output end of the temperature sensor, and the controller is used for driving and controlling the working state of the cooling device.
Preferably, the signal amplification circuit includes an operational amplifier U1, a non-inverting input terminal of the operational amplifier U1 is connected to one end of a resistor R1 and a capacitor C1 and a signal output terminal of the temperature sensor through a resistor R2, the other ends of the resistor R1 and the capacitor C1 are grounded in parallel, an inverting input terminal of the operational amplifier U1 is connected to one end of the resistor R3 and the capacitor C2 and a pin 1 of an adjustable resistor RP1, the other end of the resistor R3 is connected to a +5V power supply, the other end of the capacitor C2 is grounded to pins 2 and 3 of the adjustable resistor RP1, and a resistor R4 is further connected between the non-inverting input terminal and the output terminal of the operational amplifier U1.
Preferably, the integrating filter circuit comprises an operational amplifier U2, a non-inverting input terminal of the operational amplifier U2 is connected to an output terminal of the operational amplifier U1 through a resistor R5, an inverting input terminal of the operational amplifier U2 is connected to one end of resistors R6, R7 and a capacitor C4, the other end of the resistor R6 is grounded through a capacitor C3, and the other end of the resistor R7 and the other end of the capacitor C4 are connected to an output terminal of the operational amplifier U2.
Preferably, the output end of the op-amp U1 is further connected to one end of a capacitor C5 and the temperature detection end of the controller through an inductor L1, and the other end of the capacitor C5 is grounded.
Preferably, the cooling device comprises a cold water pipeline communicated with the inside of the sand shooting assembly, an electric control flow valve is arranged on the cold water pipeline, and the control end of the electric control flow valve is connected with the output end of the controller.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the utility model discloses a temperature sensor J1 real-time detection penetrates sand subassembly internal temperature, and its detected signal sends into signal amplification circuit at first and amplifies, and the external high frequency clutter interference in the preliminary filtering temperature detection process guarantees the precision that the temperature detected signal enlargies;
2. the integral filter circuit has an integral function on the amplification of the detection signal, so that the phase of the signal is adjusted, and the stability of the output waveform of the temperature detection signal is ensured;
3. when the temperature detection value inside the sand shooting assembly exceeds the preset value, the controller drives and controls the cooling device to work, so that the temperature in the sand shooting assembly is kept constant, and the precoated sand in the sand shooting assembly is in an environment with constant temperature, thereby ensuring the quality of a core product.
Drawings
Fig. 1 is a schematic diagram of the signal amplification circuit of the present invention.
Fig. 2 is a schematic diagram of the integrating filter circuit of the present invention.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings 1 to 2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The temperature control system of the precoated sand core shooter comprises a temperature sensor J1 and a cooling device which are arranged inside a sand shooting assembly, and further comprises a temperature monitoring assembly, wherein the temperature monitoring assembly comprises a signal amplifying circuit, an integral filter circuit and a controller which are sequentially connected, the input end of the signal amplifying circuit is connected with the signal output end of the temperature sensor J1, and the controller is used for driving and controlling the working state of the cooling device.
The temperature sensor J1 detects the temperature in the sand shooting assembly in real time, and a detection signal of the temperature sensor J1 is firstly sent to the signal amplification circuit to be amplified. As shown in fig. 1, the signal amplifying circuit includes an operational amplifier U1, a non-inverting input terminal of the operational amplifier U1 is connected to one end of a resistor R1 and a capacitor C1 and a signal output terminal of a temperature sensor J1 through a resistor R2, the other ends of the resistor R1 and the capacitor C1 are grounded in parallel, an inverting input terminal of the operational amplifier U1 is connected to one end of the resistor R3 and the capacitor C2 and a pin 1 of an adjustable resistor RP1, the other end of the resistor R3 is connected to a +5V power supply, the other end of the capacitor C2 is grounded to pins 2 and 3 of the adjustable resistor RP1, and a resistor R4 is further connected between the non-inverting input terminal and the output terminal of the operational.
In the processing process of the signal amplification circuit, the RC filter formed by the resistor R1 and the capacitor C1 is used for reducing noise of a detection signal of the temperature sensor J1, and external high-frequency clutter interference in the temperature detection process is primarily filtered. The detection signal after RC filtering is sent to the operational amplifier U1 to be amplified, and in the amplification process, the resistor R3 and the adjustable resistor RP1 are connected in series to divide the voltage of the +5V power supply, so that a reference voltage is formed at the inverting input end of the operational amplifier U1, and the amplification accuracy of the temperature detection signal is ensured. The capacitor C2 has a stabilizing effect on the reference voltage, and the resistance value of the adjustable resistor RP1 can be adjusted to change the reference voltage value, so that the reference intensity of the temperature detection signal can be conveniently adjusted.
The amplified signal of the operational amplifier U1 is sent to an integrating filter circuit for adjustment, as shown in fig. 2, the integrating filter circuit includes an operational amplifier U2, the non-inverting input terminal of the operational amplifier U2 is connected to the output terminal of the operational amplifier U1 through a resistor R5, the inverting input terminal of the operational amplifier U2 is connected to one end of resistors R6, R7 and a capacitor C4, the other end of the resistor R6 is grounded through a capacitor C3, and the other ends of the resistor R7 and the capacitor C4 are connected to the output terminal of the operational amplifier U2.
In the amplification process of the operational amplifier U2, a resistor-capacitor feedback network at the feedback end of the operational amplifier U2 integrates the amplification of the detection signal, so that the phase of the signal is adjusted, and the stability of the output waveform of the temperature detection signal is ensured. The output end of the operational amplifier U1 is also connected with one end of a capacitor C5 and the temperature detection end of the controller through an inductor L1, and the other end of the capacitor C5 is grounded. The inductor L1 and the capacitor C5 form LC filtering to further filter the output signal of the operational amplifier U2, so that the accuracy of temperature detection is greatly improved, and system deviation is avoided.
The utility model discloses when specifically using, the inside temperature of sand subassembly is penetrated to temperature sensor J1 real-time detection, and its detected signal enlargies in sending into signal amplification circuit at first, and the external high frequency clutter interference among the preliminary filtering temperature testing process guarantees the precision that the temperature detected signal enlargies. Then, the integral filter circuit plays an integral role in amplifying the detection signal, so that the phase of the signal is adjusted, and the stability of the output waveform of the temperature detection signal is ensured. And finally, after LC filtering, sending the sand into the controller for A/D conversion into digital quantity, comparing the digital quantity with a system preset value, and when the temperature detection value in the sand shooting assembly exceeds the preset value, driving the cooling device to work by the controller.
When the sand shooting assembly is specifically arranged, the cooling device comprises a cold water pipeline communicated with the inside of the sand shooting assembly, an electric control flow valve is arranged on the cold water pipeline, and the control end of the electric control flow valve is connected with the output end of the controller. The controller is through the entering flow of the steerable cooling water of control automatically controlled flow valve to adjust the cooling degree to the shooting subassembly, make the temperature in the shooting subassembly keep invariable, the tectorial membrane sand in the shooting subassembly is in the environment of a constancy of temperature, thereby guarantees the quality of core product.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (5)
1. Tectorial membrane sand core shooter temperature control system, including setting up at the inside temperature sensor and the cooling device of shooting sand subassembly, its characterized in that: still include the temperature monitoring subassembly, the temperature monitoring subassembly is including the signal amplification circuit, integral filter circuit and the controller that connect gradually, the input of signal amplification circuit is connected temperature sensor's signal output part, the controller is used for drive control cooling device's operating condition.
2. The precoated sand core shooter temperature control system according to claim 1, characterized in that: the signal amplification circuit comprises an operational amplifier U1, the non-inverting input end of the operational amplifier U1 is connected with one end of a resistor R1 and a capacitor C1 and the signal output end of the temperature sensor through a resistor R2, the other ends of the resistor R1 and the capacitor C1 are grounded in parallel, the inverting input end of the operational amplifier U1 is connected with one end of a resistor R3 and a capacitor C2 and a pin 1 of an adjustable resistor RP1, the other end of the resistor R3 is connected with a +5V power supply, the other end of the capacitor C2 is grounded with pins 2 and 3 of an adjustable resistor RP1, and a resistor R4 is further connected between the non-inverting input end and the output end of the operational amplifier U1.
3. The precoated sand core shooter temperature control system according to claim 2, characterized in that: the integral filter circuit comprises an operational amplifier U2, wherein the non-inverting input end of the operational amplifier U2 is connected with the output end of the operational amplifier U1 through a resistor R5, the inverting input end of the operational amplifier U2 is connected with one ends of resistors R6, R7 and a capacitor C4, the other end of the resistor R6 is grounded through a capacitor C3, and the other ends of the resistor R7 and the capacitor C4 are connected with the output end of the operational amplifier U2.
4. The precoated sand core shooter temperature control system according to claim 3, characterized in that: the output end of the operational amplifier U1 is also connected with one end of a capacitor C5 and the temperature detection end of the controller through an inductor L1, and the other end of the capacitor C5 is grounded.
5. The precoated sand core shooter temperature control system according to any one of claims 1 to 4, characterized in that: the cooling device comprises a cold water pipeline communicated with the inside of the sand shooting assembly, an electric control flow valve is arranged on the cold water pipeline, and the control end of the electric control flow valve is connected with the output end of the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020084539.0U CN210864438U (en) | 2020-01-15 | 2020-01-15 | Temperature control system of precoated sand core shooter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020084539.0U CN210864438U (en) | 2020-01-15 | 2020-01-15 | Temperature control system of precoated sand core shooter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210864438U true CN210864438U (en) | 2020-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020084539.0U Active CN210864438U (en) | 2020-01-15 | 2020-01-15 | Temperature control system of precoated sand core shooter |
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| Country | Link |
|---|---|
| CN (1) | CN210864438U (en) |
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2020
- 2020-01-15 CN CN202020084539.0U patent/CN210864438U/en active Active
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