CN213419189U - Crankcase exhaust pressure control device - Google Patents
Crankcase exhaust pressure control device Download PDFInfo
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- CN213419189U CN213419189U CN202021672807.7U CN202021672807U CN213419189U CN 213419189 U CN213419189 U CN 213419189U CN 202021672807 U CN202021672807 U CN 202021672807U CN 213419189 U CN213419189 U CN 213419189U
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- exhaust gas
- engine
- differential pressure
- crankcase
- pressure switch
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Abstract
The utility model relates to a crankcase waste gas pressure control device, the exhaust gas pipe of being connected including the gas outlet of one end and engine, characterized by: the other end of the exhaust gas pipe is connected with the lower end of an exhaust gas filter, and the exhaust gas filter is fixed on the engine through a filter pipe clamp; an exhaust gas braided tube is in an inverted U shape, and one end of the exhaust gas braided tube is connected with the upper end of the exhaust gas filter; the lower part of the support frame is positioned and connected with the upper part of the engine, the surface of the upper part of the support frame is provided with a joint, and the upper end of the joint is connected with the other end of the waste gas braided tube; a differential pressure switch is fixedly connected with the middle part of the supporting frame, and the lower end part of the differential pressure switch is provided with a wire inlet and outlet; the air inlet end at the upper part of the differential pressure switch is connected with the lower end of the joint through a rubber pipe. The utility model discloses can be because of the too big fault occurrence of crankcase exhaust gas pressure to the engine shutdown protection, prevent that the continuation operation from causing harm.
Description
Technical Field
The utility model relates to a diesel engine advances exhaust system, concretely relates to crankcase exhaust pressure control device.
Background
It is one of the common failures of diesel engines that the lower exhaust (crankcase exhaust) of the diesel engine is too large. The causes of too large exhaust gas pressure of the crankcase of the diesel engine are many, and mainly include (1) serious abrasion of a piston ring or a cylinder sleeve, (2) opening alignment of the piston ring and (3) adhesion or fracture of the piston ring; (4) the method comprises the following steps of (1) burning or pulling a cylinder at the top of a piston, (5) failure of a crankcase breather, (6) too much oil filling amount of engine oil, (7) serious blow-by in an air compressor; (8) piston ring or liner factors, among other factors, cause large major differences in crankcase exhaust gas pressure. If the crankcase exhaust pressure is too high: increasing the consumption of engine oil; secondly, the diesel engine seriously emits blue smoke; carbon deposition at the top of the piston or in a piston ring groove is easily caused, so that cylinder pulling failure is caused; and fourthly, for a closed circulation crankcase breathing system (namely, the exhaust pipe of the respirator is directly led into the air inlet pipe of the diesel engine), ablation failure of the top of the piston is easily caused. Therefore, control of the crankcase exhaust gas pressure is required to protect the diesel engine.
CN101144406 discloses a "crankcase pressure control system", which includes an oil-gas separator, a check valve, a pipeline: the crankcase and the intake manifold are provided with a feedback system and a pressure control unit, the crankcase and the intake manifold are provided with three pressure sensors, and the pressure control unit comprises an electronic control unit ECU, a vacuum system and a pressure control valve. The pressure of a crankcase and the pressure of an intake manifold are measured by a sensor in the system, and are fed back to a pressure control unit, are calculated by an ECU (electronic control unit), and are fed back to a pressure control valve in the pressure control unit to adjust the pressure in a crankshaft. And the crankcase pressure and the intake manifold pressure are collected at any moment and fed back to the ECU for calculation, and an instruction is sent to a pressure control valve in the pressure control unit. Eventually maintaining the crankshaft pressure within a certain range.
CN104632319A discloses a novel crankcase waste gas pressure control valve, which comprises a pressure valve body with an air inlet and an air outlet, an elastic valve core and a valve cover, wherein the air outlet is provided with a sealing rubber ring; wherein the air inlet end is connected with the crankcase, and the air outlet end is communicated with the atmosphere; the inside of the pressure valve body is provided with a labyrinth passage, the elastic valve core is arranged on the labyrinth passage, the labyrinth passage is favorable for oil-gas separation in the crankcase, the oil consumption is reduced, and meanwhile, the pressure of waste gas in the crankcase is controlled to be within an allowable pressure range through the elastic valve core; the labyrinth passage on the pressure valve body leads the waste gas exhausted from the crankcase to the air inlet pipe through the elastic valve core, and finally the waste gas is led into the combustion chamber for treatment to avoid environmental pollution or is directly led into the outside air.
The technical solutions disclosed in the above patent documents are, of course, a useful attempt in the technical field.
Disclosure of Invention
The utility model aims at providing a crankcase exhaust gas pressure controlling means, it can be because of the too big fault occurrence of crankcase exhaust gas pressure when carrying out shutdown protection to the engine, prevents that the continuation operation from causing harm.
A crankcase waste gas pressure control device, the exhaust gas pipe of being connected including the gas outlet of one end and engine, characterized by: the other end of the exhaust gas pipe is connected with the lower end of an exhaust gas filter, and the exhaust gas filter is fixed on the engine through a filter pipe clamp; an exhaust gas braided tube is in an inverted U shape, and one end of the exhaust gas braided tube is connected with the upper end of the exhaust gas filter;
the lower part of the support frame is positioned and connected with the upper part of the engine, the surface of the upper part of the support frame is provided with a joint, and the upper end of the joint is connected with the other end of the waste gas braided tube;
a differential pressure switch is fixedly connected with the middle part of the supporting frame, and the lower end part of the differential pressure switch is provided with a wire inlet and outlet; the air inlet end at the upper part of the differential pressure switch is connected with the lower end of the joint through a rubber pipe.
Furthermore, the differential pressure switch is a normally open switch, one of the inlet and outlet wires of the differential pressure switch is connected with the anode of the power supply through a time delay relay, and the other of the inlet and outlet wires of the differential pressure switch is connected with the cathode of the power supply; and the normally closed point of the time delay relay is connected in series with the operation line of the unit controller.
Furthermore, the crankcase waste gas pressure control device also comprises an alarm indicator light which is connected with the normally-on point of the time delay relay in series, and two ends of the two series-connected alarm indicator light are respectively connected with the anode and the cathode of the power supply.
The utility model has the advantages of:
the engine can be stopped in time when the fault causing the waste gas pressure to increase occurs, so that the larger loss is avoided, enough delay time is reserved, the engine is completely stopped, the alarm is indicated, and the engine is effectively protected.
Because the exhaust gas filter is arranged at the upper end of the leading-out opening of the engine, the exhaust gas filter is utilized to filter oil and water in exhaust gas, so that the service life of the pressure difference switch is longer, the oil and the water in the air pipe flow back to the engine at the filter after the engine stops, and the service life of the filter is prolonged.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic circuit diagram of the present invention.
In the figure: 1-exhaust gas pipe, 2-filter pipe clamp, 3-exhaust gas filter, 4-exhaust gas braided pipe;
5-support frame, 51-joint;
6-rubber tube;
7-differential pressure switch, 71-wire inlet and outlet;
8, a time delay relay;
9-alarm indicator light.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, the crankcase exhaust gas pressure control device includes an exhaust pipe 1 having one end connected to an outlet of an engine, and is characterized in that: the other end of the exhaust gas pipe 1 is connected with the lower end of an exhaust gas filter 3 which is fixed on the engine through a filter pipe clamp 2; the waste gas filter is used for filtering oil and water in the waste gas so as to prolong the service life of the pressure difference switch.
An exhaust gas weaving pipe 4 is in an inverted U shape, and one end of the exhaust gas weaving pipe is connected with the upper end of the exhaust gas filter 3; the effect of waste gas braided tube is the drainage, and engine exhaust passes through by the waste gas braided tube after the filter again, and gas for by down to last, be in order to prevent that there is a small amount of unfiltered oil and gas to flow backward to differential pressure switch and flow backward to the filter kneck after the engine shuts down, unpack the joint apart at fixed maintenance time: if oil and water are found, the filter is directly replaced.
A support frame 5 is in a shape of a Chinese character 'yi', the lower part of the support frame is positioned and connected with the upper part of the engine, the surface of the upper part of the support frame is provided with a joint 51, and the upper end of the joint is connected with the other end of the waste gas braided tube 4;
a differential pressure switch 7 is fixedly connected with the middle part of the support frame 5, and the lower end part is provided with a wire inlet and outlet 71; the air inlet end of the upper part of the differential pressure switch 7 is connected with the lower end of the joint 51 through a rubber pipe 6. The device finds that the differential pressure switch is aged due to the shaking of the engine if the differential pressure switch is installed on the engine in a plurality of tests, so that a special bracket is designed, and the bracket can be installed on the ground and the wall; because the air inlet of the differential pressure switch is smaller, the butt joint of the waste gas braided tube is designed on the bracket, the copper tube with the same size as the air inlet of the differential pressure switch is arranged below the bracket, the distance is small, and the rubber tube is connected by the simplest method.
The differential pressure switch 7 is a normally open switch, one of the inlet and outlet wires of the differential pressure switch is connected with the anode of the power supply through a delay relay 8, and the other of the inlet and outlet wires of the differential pressure switch is connected with the cathode of the power supply; the normally closed point of the delay relay 8 is connected in series with the operation line of the unit controller.
The alarm device also comprises an alarm indicator lamp 9 connected with the normally-open point of the time delay relay 8 in series, and the two ends of the time delay relay and the alarm indicator lamp after being connected in series are respectively connected with the anode and the cathode of the power supply.
The utility model utilizes the instantaneous characteristic of the differential pressure switch and the power-off delay characteristic of the power-off delay relay to realize that when the waste gas pressure of the crankcase reaches a set value, the engine can be stopped instantaneously, and the engine can not be restarted within the set time of the delay relay, thereby effectively protecting the engine; meanwhile, the alarm indicator lights flash within the set time so as to find out the shutdown reason in time.
Claims (3)
1. The utility model provides a crankcase exhaust gas pressure controlling means, includes exhaust gas pipe (1) that one end is connected with the gas outlet of engine, characterized by: the other end of the exhaust gas pipe (1) is connected with the lower end of an exhaust gas filter (3), and the exhaust gas filter is fixed on an engine through a filter pipe clamp (2); an exhaust gas braided tube (4) is in an inverted U shape, and one end of the exhaust gas braided tube is connected with the upper end of the exhaust gas filter (3);
a support frame (5) is in a shape of a Chinese character 'yi', the lower part of the support frame is positioned and connected on the upper part of the engine, the surface of the upper part of the support frame is provided with a joint (51), and the upper end of the joint is connected with the other end of the waste gas braided tube (4);
a differential pressure switch (7) is fixedly connected to the middle part of the support frame (5), and the lower end part is provided with a wire inlet and outlet (71); the air inlet end at the upper part of the differential pressure switch (7) is connected with the lower end of the joint (51) through a rubber pipe (6).
2. The crankcase exhaust gas pressure control device according to claim 1, characterized in that: the differential pressure switch (7) is a normally open switch, one of the inlet and outlet wires of the differential pressure switch is connected with the positive electrode of the power supply through a time delay relay (8), and the other of the inlet and outlet wires of the differential pressure switch is connected with the negative electrode of the power supply; the normally closed point of the delay relay (8) is connected in series with the operation line of the unit controller.
3. The crankcase exhaust gas pressure control device according to claim 2, characterized in that: the alarm device is characterized by further comprising an alarm indicator lamp (9) connected with a normally open point of the time delay relay (8) in series, wherein two ends of the alarm indicator lamp (9) after the alarm indicator lamp and the time delay relay are connected in series are respectively connected with the positive electrode and the negative electrode of the power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021672807.7U CN213419189U (en) | 2020-08-12 | 2020-08-12 | Crankcase exhaust pressure control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021672807.7U CN213419189U (en) | 2020-08-12 | 2020-08-12 | Crankcase exhaust pressure control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213419189U true CN213419189U (en) | 2021-06-11 |
Family
ID=76256704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021672807.7U Active CN213419189U (en) | 2020-08-12 | 2020-08-12 | Crankcase exhaust pressure control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213419189U (en) |
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2020
- 2020-08-12 CN CN202021672807.7U patent/CN213419189U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 2006, Xinglong Avenue, Fenghuang Lake Industrial Park, Yongchuan District, Chongqing 402160 Patentee after: Chongqing Pangu Power Technology Co.,Ltd. Address before: No. 2006, Xinglong Avenue, Fenghuang Lake Industrial Park, Yongchuan District, Chongqing 402160 Patentee before: CHONGQING GOOGOL ENGINE-TECH Co.,Ltd. |