CN212615376U - Locking control system for air compressor - Google Patents
Locking control system for air compressor Download PDFInfo
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- CN212615376U CN212615376U CN202020443909.5U CN202020443909U CN212615376U CN 212615376 U CN212615376 U CN 212615376U CN 202020443909 U CN202020443909 U CN 202020443909U CN 212615376 U CN212615376 U CN 212615376U
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Abstract
The utility model discloses a shutting control system for air compressor, this system sets up the switching signal department between air compressor's cooling fan host computer and controller, including the fuel cut-off valve and the fan contactor that connect in parallel each other in the system, be equipped with the air compressor machine contactor auxiliary contact who establishes ties mutually with the parallel connection point of fuel cut-off valve and fan contactor in the air compressor, protection switch group, controller and power, the input of air compressor machine contactor auxiliary contact and two end point departments of output connect in parallel and are provided with switching element, fuel cut-off valve and fan contactor pass through the switching-on and-off of air compressor machine contactor auxiliary contact and switching element and link to each other or break off between the controller; by adopting the technical scheme, the phenomenon that the fuel cut-off valve and the cooling fan do not work when the auxiliary contact of the fan contactor fails is effectively avoided.
Description
Technical Field
The utility model belongs to air compressor machine equipment field, more specifically says, the utility model relates to a shutting control system for air compressor.
Background
The screw type air compressor has the advantages of high efficiency, no maintenance, high reliability and the like, is selected for various industries and is used for providing high-quality compressed air; lubricating oil of the screw air compressor has the functions of sealing, cooling, noise reduction and lubricating; the cooling fan is an important ring for controlling the temperature of the air compressor, if lubricating oil is lacked or the cooling fan stops running, serious potential safety hazards can be buried in the running of the air compressor, even the air compressor is burnt out, and huge economic loss is caused; the logical relations among the oil-cut-off valve, the cooling fan and the main motor of the air compressor of the original control system are as follows: the controller receives an air compressor starting instruction, so that the cooling fan contactor is actuated and the cooling fan runs, then the high-voltage starting cabinet fan contactor is actuated, the main motor of the air compressor is started, finally the auxiliary contact of the fan contactor is connected, the oil cut-off valve is electrified, and lubricating oil starts to be provided.
The prior art control system shown in fig. 1 has the following disadvantages:
once the auxiliary contact of the high-voltage cabinet fan contactor fails (disconnection, oxidation, virtual connection and the like), the oil cut-off valve stops supplying oil, and the screw air compressor runs under the condition of oil cut-off.
Because the fuel cut-off valve is also controlled by the emergency stop button, the temperature switch and the pressure switch, any one of the fuel cut-off valves can stop supplying fuel when a problem occurs.
In the original control system, as long as the cooling fan contactor works, the high-voltage starting cabinet fan contactor of the air compressor has a switching-on condition, and the working condition of an oil cut-off valve is not considered.
Once a power switch of the cooling fan is in fault opening, the cooling fan loses a main power supply, a motor of the cooling fan stops running, a control circuit of the cooling fan is still in a power-on state, a contactor coil of the cooling fan is still in the power-on state, and the air compressor continues to run until an over-temperature protection action is in opening and shutting down, so that potential safety hazards are buried.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a guarantee air compressor moves stable shutting control system is provided.
In order to realize the purpose, the utility model discloses the technical scheme who takes does:
a locking control system for an air compressor is arranged at an opening and closing signal position between a cooling fan host and a controller of the air compressor, the system comprises an oil break valve and a fan contactor which are connected in parallel, an air compressor contactor auxiliary contact, a protection switch group, a controller and a power supply which are connected in series with a parallel connection point of the oil break valve and the fan contactor are arranged in the air compressor, switch elements are arranged at two input end points and two output end points of the air compressor contactor auxiliary contact in parallel, and the oil break valve and the fan contactor are connected or disconnected with the controller through on-off switching of the air compressor contactor auxiliary contact and the switch elements.
The utility model discloses a shutting control system for air compressor, the fuel cut-off valve sets up the one end that supplies oil pipe way at air compressor's lubricating oil, and the switching signal input of fuel cut-off valve links to each other with the controller, and the fuel cut-off valve provides lubricating oil in air compressor through the control signal that receives the controller output cooling fan host computer.
The utility model discloses a shutting control system for air compressor, switching element closes the branch valve relay and closes branch valve relay auxiliary contact including closing branch valve relay auxiliary contact and connect in parallel in air compressor machine contactor auxiliary contact's both ends, fuel cut-off valve and fan contactor all can receive the opening signal of controller output and open simultaneously through closing branch valve relay auxiliary contact, close the branch valve relay establish ties in between controller and the power, and with the parallelly connected both ends point of fuel cut-off valve and fan contactor constitutes closed circuit.
The utility model discloses a shutting control system for air compressor, protection switch group is including scram switch, temperature switch and the pressure switch who establishes ties in proper order.
The utility model discloses a shutting control system for air compressor, cooling blower's switch department is provided with the miniature circuit breaker who has auxiliary contact, this miniature circuit breaker's auxiliary contact with the overload signal input of controller links to each other, and the controller receives cooling blower's overload signal through auxiliary contact's closure.
By adopting the technical scheme, after the oil break valve and the cooling fan contactor are connected in parallel, the auxiliary contact of the air compressor high-voltage cabinet air compression contactor is connected in series, and the oil break valve and the cooling fan can work as long as the air compression contactor is switched on. The auxiliary contact of the on-off relay is connected in parallel with the auxiliary contact of the air compression contactor, so that the phenomena of an oil cut-off valve and non-operation of a cooling fan when the auxiliary contact of the fan contactor has a problem are effectively avoided; the oil cut-off valve and the cooling fan are not controlled by an emergency stop button, a temperature switch and a pressure switch any more, and after a fan contactor is switched off and the air compressor is stopped, the oil cut-off valve and the cooling fan stop working; replacing a power switch of the cooling fan with a miniature circuit breaker with an auxiliary contact, and connecting a set of closed points of the miniature circuit breaker in series with the closed points for overload protection of the cooling fan of the controller terminal; once the power switch of the cooling fan is opened due to fault, the auxiliary contact is disconnected, and the control device can acquire the information of the auxiliary contact, so that the air compressor is protected.
The present invention will be described in more detail with reference to the accompanying drawings and examples.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
FIG. 1 is a schematic diagram of a prior art control connection of the present invention;
FIG. 2 is a schematic diagram of the control connection of the latching control system of the present invention;
fig. 3 is a schematic diagram of the fan main switch connection of the locking control system of the present invention.
Detailed Description
The following description of the embodiments of the present invention, with reference to the accompanying drawings, will be made in further detail to explain, for example, the shapes and structures of the components, the mutual positions and connection relationships among the components, the functions and working principles of the components, the manufacturing process, and the operation and use method of the components, so as to help those skilled in the art to understand the concept and technical solutions of the present invention more completely, accurately and deeply.
Fig. 2 is the control connection schematic diagram of the locking control system of the utility model, fig. 3 is the utility model discloses a locking control system's fan host switch connection schematic diagram, a locking control system for air compressor as shown in fig. 2 and fig. 3, this system sets up the switching signal department between air compressor's cooling fan host computer and controller, including parallelly connected fuel cut-off valve and fan contactor in the system, be equipped with air compressor contactor auxiliary contact, protection switch group, controller and the power of establishing ties with the parallel connection point of fuel cut-off valve and fan contactor among the air compressor, the input of air compressor contactor auxiliary contact and two output end point departments of output connect in parallel are provided with switching element, fuel cut-off valve and fan contactor pass through the switching of air compressor contactor auxiliary contact and switching element and link to each other or break off between the controller; the switching element comprises an on-off valve relay and an on-off valve relay auxiliary contact, the on-off valve relay auxiliary contact is connected in parallel with two ends of the air compressor contactor auxiliary contact, the fuel cut-off valve and the fan contactor can receive an opening signal output by the controller through the on-off valve relay auxiliary contact and are simultaneously opened, the on-off valve relay is connected in series between the controller and the power supply and forms a closed loop with two parallel end points of the fuel cut-off valve and the fan contactor; the protection switch group comprises an emergency stop switch, a temperature switch and a pressure switch which are sequentially connected in series.
The oil cut-off valve in the scheme is arranged at one end of a lubricating oil supply pipeline of the air compressor, the opening and closing signal input end of the oil cut-off valve is connected with the controller, and the oil cut-off valve provides lubricating oil to the cooling fan host in the air compressor by receiving a control signal output by the controller.
The switch of the cooling fan is provided with a miniature circuit breaker with an auxiliary contact, the auxiliary contact of the miniature circuit breaker is connected with the overload signal input end of the controller, and the controller receives the overload signal of the cooling fan through the closing of the auxiliary contact.
By adopting the technical scheme, after the oil break valve and the cooling fan contactor are connected in parallel, the auxiliary contact of the air compressor high-voltage cabinet air compression contactor is connected in series, and the oil break valve and the cooling fan can work as long as the air compression contactor is switched on. The auxiliary contact of the on-off relay is connected in parallel with the auxiliary contact of the air compression contactor, so that the phenomena of an oil cut-off valve and non-operation of a cooling fan when the auxiliary contact of the fan contactor has a problem are effectively avoided; the oil cut-off valve and the cooling fan are not controlled by an emergency stop button, a temperature switch and a pressure switch any more, and after a fan contactor is switched off and the air compressor is stopped, the oil cut-off valve and the cooling fan stop working; replacing a power switch of the cooling fan with a miniature circuit breaker with an auxiliary contact, and connecting a set of closed points of the miniature circuit breaker in series with the closed points for overload protection of the cooling fan of the controller terminal; once the power switch of the cooling fan is opened due to fault, the auxiliary contact is disconnected, and the control device can acquire the information of the auxiliary contact, so that the air compressor is protected.
The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements can be made without modification to the method and technical solution of the present invention, or the present invention can be directly applied to other occasions without modification, all within the scope of the present invention.
Claims (5)
1. The locking control system is arranged at the opening and closing signal position between a cooling fan host and a controller of the air compressor, the system comprises an oil break valve and a fan contactor which are connected in parallel, an air compressor contactor auxiliary contact, a protection switch group, a controller and a power supply which are connected in series with the parallel connection point of the oil break valve and the fan contactor are arranged in the air compressor, and the locking control system is characterized in that switch elements are arranged at the input end point and the output end point of the air pressure contactor auxiliary contact in parallel, and the oil break valve and the fan contactor are connected or disconnected with the controller through the on-off switching of the air pressure contactor auxiliary contact and the switch elements.
2. The lock-up control system for an air compressor as claimed in claim 1, wherein the oil cut-off valve is provided at one end of a lubricant supply line of the air compressor, an opening/closing signal input terminal of the oil cut-off valve is connected to the controller, and the oil cut-off valve supplies the lubricant to the cooling fan main unit in the air compressor by receiving a control signal outputted from the controller.
3. The lock-up control system for an air compressor according to claim 1, wherein the switching element includes an on/off valve relay and an on/off valve relay auxiliary contact connected in parallel to both ends of the air compressor contactor auxiliary contact, the fuel cut-off valve and the fan contactor each receive an on signal output from the controller through the on/off valve relay auxiliary contact and are simultaneously turned on, and the on/off valve relay is connected in series between the controller and the power supply and forms a closed loop with both parallel ends of the fuel cut-off valve and the fan contactor.
4. A latch control system for an air compressor according to claim 1, wherein said protection switch group comprises an emergency stop switch, a temperature switch and a pressure switch connected in series in sequence.
5. The latch control system for an air compressor according to claim 1, wherein a micro breaker having an auxiliary contact is provided at a switch of the cooling blower, the auxiliary contact of the micro breaker is connected to the overload signal input terminal of the controller, and the controller receives the overload signal of the cooling blower by closing the auxiliary contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020443909.5U CN212615376U (en) | 2020-03-31 | 2020-03-31 | Locking control system for air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020443909.5U CN212615376U (en) | 2020-03-31 | 2020-03-31 | Locking control system for air compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212615376U true CN212615376U (en) | 2021-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020443909.5U Active CN212615376U (en) | 2020-03-31 | 2020-03-31 | Locking control system for air compressor |
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| CN (1) | CN212615376U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113422541A (en) * | 2021-06-22 | 2021-09-21 | 河北白沙烟草有限责任公司 | Method for improving operation reliability of isolating switch |
-
2020
- 2020-03-31 CN CN202020443909.5U patent/CN212615376U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113422541A (en) * | 2021-06-22 | 2021-09-21 | 河北白沙烟草有限责任公司 | Method for improving operation reliability of isolating switch |
| CN113422541B (en) * | 2021-06-22 | 2022-11-01 | 河北白沙烟草有限责任公司 | Method for improving operation reliability of isolating switch |
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