CN209818046U - Protection circuit of drilling machine hydraulic control system - Google Patents
Protection circuit of drilling machine hydraulic control system Download PDFInfo
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- CN209818046U CN209818046U CN201920315691.2U CN201920315691U CN209818046U CN 209818046 U CN209818046 U CN 209818046U CN 201920315691 U CN201920315691 U CN 201920315691U CN 209818046 U CN209818046 U CN 209818046U
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Abstract
The utility model belongs to the field of hydraulic control systems, and provides a protection circuit of a hydraulic control system of a drilling machine aiming at the problem of faults easily caused by overhigh oil temperature of the hydraulic control system when the drilling machine is used, which comprises an oil temperature sensor and an oil level sensor which are arranged in a hydraulic oil tank; the output end of the oil temperature sensor is connected with the input end of the oil temperature control safety grid, and the relay output contact of the oil temperature control safety grid is connected with the oil temperature relay in series and then connected to the two ends of the power supply; the output end of the oil level sensor is connected with the input end of the oil level control safety grid, and the relay output contact of the oil level control safety grid is connected with the oil level delay relay in series and then connected to the two ends of the power supply; the normally open contact of the oil level delay relay, the normally open contact of the oil temperature relay and the control relay are connected in series and then connected to two ends of a power supply. The utility model discloses simple structure, convenient to use can the wide application in the liquid accuse system.
Description
Technical Field
The utility model belongs to liquid accuse system field, concretely relates to protection circuit of rig liquid accuse system.
Background
In the normal use process of the kilometer directional drilling machine, a hydraulic control system of the kilometer directional drilling machine can generate a large amount of heat, and if the temperature of hydraulic oil is too high, sealing rings of various connecting parts can be damaged to cause various oil leakage problems. Not only wastes hydraulic oil, but also causes the problem of environmental pollution; on the other hand, because the integration level of the kilometer drilling machine is higher, troubleshooting and later-stage maintenance for finding oil leakage points are also very difficult. Therefore, the hydraulic control system of the drilling machine needs to be improved to monitor the hydraulic oil in the drilling machine and avoid the hydraulic control system fault caused by overhigh oil temperature of the drilling machine.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes the deficiencies in the prior art, the technical problem who solves is: a protection circuit for a drilling machine hydraulic control system is provided.
In order to solve the technical problem, the utility model discloses a technical scheme be: a protection circuit of a drilling machine hydraulic control system comprises a safety barrier power supply, an oil temperature control safety barrier, an oil level control safety barrier, an oil temperature sensor, an oil level delay relay, an oil temperature relay and a control relay; the safety grid power supply is used for supplying power to the oil temperature control safety grid and the oil level control safety grid; the oil temperature sensor and the oil level sensor are arranged in the hydraulic oil tank; the output end of the oil temperature sensor is connected with the input end of the oil temperature control safety grid, and the relay output contact of the oil temperature control safety grid is connected with the two ends of the power supply after being connected with the oil temperature relay in series; the output end of the oil level sensor is connected with the input end of the oil level control safety grid, and the relay output contact of the oil level control safety grid is connected with the oil level delay relay in series and then connected to the two ends of a power supply; the oil level time delay relay normally open contact, the normally open contact of oil temperature relay and control relay connect at the power both ends after establishing ties, the normally open contact of control relay is used for controlling the vacuum contactor in the hydraulic control system major loop.
The protection circuit of the drilling machine hydraulic control system further comprises an oil temperature indicator lamp and an oil level indicator lamp, wherein the oil temperature indicator lamp is connected with the normally closed contact of the oil temperature relay in series and then connected to two ends of a power supply; and the oil level indicator lamp is connected with the normally closed contact of the oil level delay relay in series and then connected to two ends of a power supply.
The oil temperature control safety barrier and the oil level control safety barrier are integrated in a safety barrier with the model number of MTL5516C, the oil temperature sensor and the oil level sensor are switch-type sensors, two output ends of the oil temperature sensor are respectively connected with a pin 4 and a pin 5 of the safety barrier MTL5516C, and two output ends of the oil level sensor are respectively connected with a pin 1 and a pin 2 of the safety barrier MTL 5516C.
The protection circuit of the drilling machine hydraulic control system further comprises an oil temperature display, an oil temperature display safety grid MTL5575 and a second oil temperature sensor PT100 arranged in a hydraulic oil tank, wherein two output ends of the second oil temperature sensor are respectively connected with a pin 1 and a pin 3 of the oil temperature display safety grid MTL5575, and a pin 11 and a pin 12 of the oil temperature display safety grid MTL5575 are respectively connected with an input end of the oil temperature display.
Compared with the prior art, the utility model following beneficial effect has: the utility model provides a protection circuit of rig hydraulic control system, this protection circuit can control rig liquid level system and shut down under the too high or low condition of oil level of rig hydraulic control system oil tank oil temperature, furthest's the hydraulic control system of rig of having protected, reduced manpower and accessory loss, this protection circuit can apply to the hydraulic control system protection of all kinds of equipment simultaneously.
Drawings
Fig. 1 is a schematic circuit diagram of a detection portion according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a control unit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 ~ 2, the embodiment of the utility model provides a protection circuit of rig hydraulic control system, including safety barrier power PS3, safety barrier B1, safety barrier B2, oil temperature sensor K1, oil temperature sensor PT100, oil level sensor K2, oil temperature display C, oil level time delay relay OLTR, oil temperature relay OTTR, control relay CR.
As shown in fig. 1, the safety barrier power source PS3 is used to supply power to the safety barrier B1 and the safety barrier B2; the oil temperature sensor K1, the oil temperature sensor PT100 and the oil level sensor K2 are arranged in the hydraulic oil tank 1; the output end of the oil temperature sensor K1 is connected with the second input end of the safety grid B2; the output end of the oil level sensor K2 is connected with the first input end of the safety barrier. The output end of the oil temperature sensor PT100 is connected with the input end of the safety grid B2, the output end of the safety grid B2 is connected with an oil temperature display C, the oil temperature display C is arranged in an electric cabinet of the drilling machine, an operator can observe the oil temperature value displayed by the display through a window, the operator can know the operation condition of a hydraulic control system of the drilling machine in advance, and the condition of the drilling machine is pre-judged.
As shown in fig. 2, the first relay output contact B2/1 of the safety barrier B2 is connected in series with the oil level delay relay OLTR and then connected to both ends of the power supply; a second relay output contact B2/2 of the safety barrier B2 is connected with an oil temperature relay OTTR in series and then connected to two ends of a power supply; and the normally open contact of oil level time delay relay OLTR, the normally open contact of oil temperature relay OTTR and control relay CR are connected in series and then connected to the two ends of the power supply. The normally open contact of the control relay CR is connected with a coil of the vacuum contactor KM in series, the main contact of the vacuum contactor KM is arranged in a main loop of the hydraulic control system, and the vacuum contactor KM is used for controlling the on-off of the hydraulic control system.
Further, as shown in fig. 2, the protection circuit of the drilling machine hydraulic control system provided by this embodiment further includes an oil temperature indicator lamp L1 and an oil level indicator lamp L2, where the oil temperature indicator lamp L1 is connected in series with the normally closed contact of the oil temperature relay OTTR and then connected to two ends of the power supply; and the oil level indicator lamp L2 is connected with the normally closed contact of the oil level delay relay OLTR in series and then connected to two ends of a power supply.
Specifically, in the present invention, the oil temperature sensor and the oil level sensor are switch type sensors, and specifically, in the present embodiment, the model of the oil temperature sensor is 2455R 82-719L 90C, the model of the oil level sensor is LV42-7501, and they are all switch type sensors, and when the sensing temperature or the oil level reaches a set value, a switch signal is output. Safety barrier B2 is the safety barrier of model MTL5516C, is provided with the binary channels in it, is used for receiving oil temperature sensor K1 and oil level sensor K2's switching signal respectively, oil temperature sensor K1's output both ends are connected with pin 4 and pin 5 of safety barrier MTL55 5516C respectively, oil level sensor K2's output both ends are connected with pin 1 and pin 2 of safety barrier MTL5516C respectively. In the present embodiment, the oil temperature of the temperature sensor K1 is set to 80 ℃ and the oil level of the oil level sensor is set to 35L, that is, when the temperature exceeds 80 ℃, the temperature sensor K1 inputs a switching signal to the second channel of the safety fence B2, and when the oil level is less than 35L, the oil level sensor inputs a switching signal to the first channel of the safety fence. In addition, in this embodiment, the output signals of the oil temperature sensor and the oil level sensor can also be output through two single-channel safety barriers.
Specifically, in this embodiment, the model of the safety grid B1 is MTL5575, two output terminals of the oil temperature sensor PT100 are respectively connected to pin 1 and pin 3 of the safety grid MTL5575, and pin 11 and pin 12 of the oil temperature display safety grid MTL5575 are respectively connected to an input terminal of the oil temperature display. An oil temperature sensor PT100 outputs an oil temperature signal which passes through a safety grid B1 and then is displayed on an oil temperature display for an operator to observe.
The working principle of the utility model is as follows:
1. the oil temperature sensor K1 can timely transmit an oil temperature over-high signal in the hydraulic oil tank to the safety barrier, the oil temperature of the oil temperature sensor K1 is set to be 80 ℃ at the highest value, if the oil temperature exceeds the set value, the temperature sensor K1 inputs a switching signal to the second channel of the safety barrier B2, the output contact B2/2 of the second relay of the safety barrier B2 is disconnected, the oil temperature relay OTTR is de-energized, the normally open contact of the oil temperature relay CR is enabled to de-energize a vacuum contactor coil in a main loop of a hydraulic control system, namely a. Meanwhile, a normally closed contact of the oil temperature relay OTTR is closed, so that an oil temperature indicator lamp L1 is lightened to prompt an oil temperature overhigh signal;
2. the fuel level sensor K2 can timely transmit an oil level low signal inside the hydraulic tank to the safety fence, and the fuel level sensor K2 sets the minimum value of the hydraulic oil level inside the hydraulic tank to 35L. If the hydraulic oil level inside the hydraulic oil tank is lower than the set value, the oil level sensor inputs a switching signal to the first channel of the safety fence B2. The first relay output contact B2/1 of the safety barrier B2 is disconnected, so that the oil level delay relay OLTR is powered off, if the delay time is up, the normally open contact of the oil level delay relay OLTR is disconnected, the normally open contact of the oil level delay relay OLTR is powered off of the control relay CR, the normally open contact of the control relay CR enables a vacuum contactor coil in a main loop of a hydraulic control system to be powered off, namely a protection mechanism of the circuit is effective, and the drilling machine is automatically stopped. Meanwhile, the normally closed contact of the oil level delay relay OLTR is closed, so that the oil level indicator lamp L2 is lighted to indicate that the oil level is too low. The problem of the air suction abrasion of the hydraulic pump caused by too low oil level is avoided.
3. The temperature sensor PT100 transmits an oil temperature signal to an oil temperature display through a safety grid B1 to be displayed, the display is located in an electric cabinet of the drilling machine, an operator can observe the oil temperature value displayed by the display through a window, the operator can know the operation condition of a hydraulic control system of the drilling machine in advance, and the condition of the drilling machine is pre-judged.
The utility model provides a pair of protection circuit detects through oil temperature and oil level to in the oil tank, and the detected signal is behind the safety barrier, sends control circuit and protects the hydraulic control system of rig, and furthest's the hydraulic control system of rig that has protected has reduced manpower and accessory loss, and this protection circuit can apply to the hydraulic control system protection of all kinds of equipment simultaneously.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (4)
1. A protection circuit of a drilling machine hydraulic control system is characterized by comprising a safety barrier power supply, an oil temperature control safety barrier, an oil level control safety barrier, an oil temperature sensor, an oil level delay relay, an oil temperature relay and a control relay; the safety grid power supply is used for supplying power to the oil temperature control safety grid and the oil level control safety grid; the oil temperature sensor and the oil level sensor are arranged in the hydraulic oil tank; the output end of the oil temperature sensor is connected with the input end of the oil temperature control safety grid, and the relay output contact of the oil temperature control safety grid is connected with the two ends of the power supply after being connected with the oil temperature relay in series; the output end of the oil level sensor is connected with the input end of the oil level control safety grid, and the relay output contact of the oil level control safety grid is connected with the oil level delay relay in series and then connected to the two ends of a power supply; the oil level time delay relay normally open contact, the normally open contact of oil temperature relay and control relay connect at the power both ends after establishing ties, the normally open contact of control relay is used for controlling the vacuum contactor in the hydraulic control system major loop.
2. The protection circuit of the drilling machine hydraulic control system is characterized by further comprising an oil temperature indicator lamp and an oil level indicator lamp, wherein the oil temperature indicator lamp is connected with the normally closed contact of the oil temperature relay in series and then connected to two ends of a power supply; and the oil level indicator lamp is connected with the normally closed contact of the oil level delay relay in series and then connected to two ends of a power supply.
3. The protection circuit of the hydraulic control system of the drilling machine is characterized in that the oil temperature control safety barrier and the oil level control safety barrier are integrated in a safety barrier with the model number of MTL5516C, the oil temperature sensor and the oil level sensor are switch-type sensors, two output ends of the oil temperature sensor are respectively connected with a pin 4 and a pin 5 of the safety barrier MTL5516C, and two output ends of the oil level sensor are respectively connected with a pin 1 and a pin 2 of the safety barrier MTL 5516C.
4. The protection circuit of the drilling machine hydraulic control system is characterized by further comprising an oil temperature display, an oil temperature display safety grid MTL5575 and a second oil temperature sensor PT100 arranged in a hydraulic oil tank, wherein two output ends of the second oil temperature sensor PT100 are respectively connected with a pin 1 and a pin 3 of the oil temperature display safety grid MTL5575, and a pin 11 and a pin 12 of the oil temperature display safety grid MTL5575 are respectively connected with an input end of the oil temperature display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920315691.2U CN209818046U (en) | 2019-03-13 | 2019-03-13 | Protection circuit of drilling machine hydraulic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920315691.2U CN209818046U (en) | 2019-03-13 | 2019-03-13 | Protection circuit of drilling machine hydraulic control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209818046U true CN209818046U (en) | 2019-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920315691.2U Active CN209818046U (en) | 2019-03-13 | 2019-03-13 | Protection circuit of drilling machine hydraulic control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209818046U (en) |
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2019
- 2019-03-13 CN CN201920315691.2U patent/CN209818046U/en active Active
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