A multi-cylinder comprehensive alarm crankcase oil mist concentration detection device and detection method

Abstract

The present invention relates to the technical field of oil mist concentration detection, and specifically to a multi-cylinder integrated alarm crankcase oil mist concentration detection device and detection method, comprising: a base, and a fixed rod fixedly installed on the base, a protective tube is rotatably installed on the end of the fixed rod, and a plurality of first through holes evenly distributed are opened on the circumferential outer wall of the protective tube; a protective mechanism, which is arranged on the base and connected to the protective tube, and a conduction control mechanism connected to the protective mechanism is arranged on the protective tube, and the protective mechanism can be actuated when the conduction control mechanism moves to adjust the conduction state of the first through holes; a receiving rod, which is rotatably installed on the protective tube and connected to the conduction control mechanism, and a detection head is fixed on the end of the receiving rod; a pressure control mechanism is arranged in the protective tube. The present application can avoid the problem of inaccurate oil mist concentration detection due to oil splashing by controlling the conduction state of the protective tube.

Description

Technical Field

[0001] The invention relates to the technical field of oil mist concentration detection, in particular to a multi-cylinder comprehensive alarm crankcase oil mist concentration detection device and a detection method. Background Art

[0002] The crankcase oil mist concentration is an important parameter in the operation of ship diesel engines, and its concentration is directly related to the safe operation of the diesel engine and the safety of the ship.

[0003] The formation of crankcase oil mist concentration is closely related to the working principle of diesel engines. During the long-term operation of the engine, due to mechanical friction and local heating, the lubricating oil evaporates and produces high-temperature oil gas, which forms oil mist when it cools down. If the duration is too long, the oil mist concentration in the crankcase will rise, and too high oil mist concentration will bury the hidden danger of explosion in the crankcase.

[0004] Therefore, it is necessary to detect the oil mist concentration in the crankcase. The existing crankcase oil mist concentration detection is usually carried out directly through a detection head. This method is likely to cause inaccurate detection results due to oil splashing. Although the conventional protected detection head avoids the direct interference of oil splashing, it is likely to affect the normal circulation of oil mist due to oil splashing to the protective outer layer, which will still lead to inaccurate oil mist concentration detection. Summary of the invention

[0005] The purpose of the present invention is to provide a multi-cylinder comprehensive alarm crankcase oil mist concentration detection device and detection method to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-cylinder comprehensive alarm crankcase oil mist concentration detection device, comprising: a base, and a fixed rod fixedly installed on the base, a protective tube is rotatably installed on the end of the fixed rod, and a plurality of first through holes evenly distributed are opened on the circumferential outer wall of the protective tube; it also includes: a protective mechanism, which is arranged on the base and connected to the protective tube, and a conduction control mechanism connected to the protective mechanism is arranged on the protective tube, and the protective mechanism can be actuated when the conduction control mechanism moves to adjust the conduction state of the first through hole; a receiving rod, which is rotatably installed on the protective tube and connected to the conduction control mechanism, and a detection head is fixed on the end of the receiving rod; a pressure control mechanism is arranged in the protective tube and connected to the receiving rod, and the pressure control mechanism can be actuated when the first through hole is conductive, and perform alarm processing according to the pressure in the protective tube.

[0007] As a further solution of the present invention: the protective mechanism includes a guide column fixedly mounted on the base and symmetrically arranged, a fixing ring is fixed on the guide column, a support ring slidably mounted on the guide column and slidably connected to the protective tube, a second spring abutting against the support ring is sleeved on the guide column, and a driven component connected to the protective tube is provided on the support ring.

[0008] As a further solution of the present invention: the driven component includes a protective sleeve fixedly mounted on the support ring and slidably connected to the protective tube, a plurality of second through holes evenly distributed are provided on the circumferential outer wall of the protective sleeve, the second through holes cooperate with the first through holes, and an annular discharge groove and a vertical discharge groove are also provided on the protective sleeve, and the upper part of the vertical discharge groove is connected to the annular discharge groove.

[0009] As a further solution of the present invention: the conduction and regulation mechanism includes a guide groove opened on the outer wall of the protective tube, a movable sleeve is slidably installed on the protective tube, a limit block slidably connected to the guide groove is fixed on the inner wall of the movable sleeve, and a support assembly connected to the support ring is arranged on the movable sleeve.

[0010] As a further solution of the present invention: the support assembly includes a magnetic ring slidably mounted on the guide column and fixedly connected to the movable sleeve, the magnetic ring is provided with an annular groove, and support rods symmetrically arranged are slidably mounted in the annular groove, the support rods are slidably connected to the protective tube, a movable ring is fixed to one end of the support rod facing away from the magnetic ring, the movable ring is in abutment with the support ring, and one half of the movable ring is in contact with the surface of the protective sleeve, and an elastic structure connected to the magnetic ring is provided on the guide column.

[0011] As a further solution of the present invention: the elastic structure includes a support plate fixedly mounted on the end of the guide column, a first spring is sleeved on the guide column, and two ends of the first spring are respectively in contact with the support plate and the magnetic ring.

[0012] As a further solution of the present invention: the pressure regulating mechanism includes a supporting sleeve slidably mounted on the receiving rod, a sealing disk slidably connected to the receiving rod is fixed on the supporting sleeve, a conical ring is fixed in the protective tube, and a connecting assembly connected to the conical ring is provided on the supporting sleeve.

[0013] As a further solution of the present invention: the connection assembly includes a moving contact fixedly mounted on the supporting sleeve, a stationary contact cooperating with the moving contact is fixed in the protective tube, and a limiting structure connected to the conical ring is provided on the supporting sleeve.

[0014] As a further solution of the present invention: the limiting structure includes a fixed sleeve fixedly installed on the supporting sleeve, a movable rod is slidably installed in the fixed sleeve, a limiting wheel is rotatably installed on one end of the movable rod away from the fixed sleeve, the limiting wheel is abutted against the conical ring, and a third spring abutting against the limiting wheel is sleeved on the movable rod and the fixed sleeve.

[0015] A method for detecting crankcase oil mist concentration with a multi-cylinder integrated alarm comprises the following steps:

[0016] Step 1: Before the oil mist is detected, the first through hole is controlled to be in a blocked state by the protection mechanism under the action of the conduction control mechanism to ensure that the oil mist does not enter the protection tube;

[0017] Step 2: When it is necessary to detect the oil mist, the protective mechanism moves under the action of the conduction control mechanism to control the first through hole to be in a conduction state. At this time, the oil mist in the crankcase will enter the protective tube through the first through hole, and the oil mist concentration will be detected by the detection head.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the present application can detect the oil mist in the crankcase by adjusting the conduction state of the protection tube to prevent the problem of inaccurate detection results caused by oil splashing. In the initial state, under the action of the conduction control mechanism, the protection tube is in a blocked state. When it is necessary to detect the oil mist concentration in the crankcase, under the action of the conduction control mechanism, the protection mechanism is moved to make the first through hole conductive. At this time, the oil mist will enter the protection tube through the first through hole, and the oil mist concentration will be detected under the action of the detection head.

[0019] During the conduction process of the first through hole, the oil remaining on the protective mechanism can be scraped off under the action of the conduction regulating mechanism to avoid the problem of inaccurate oil mist concentration detection results due to interference from the oil.

[0020] During the oil mist concentration detection process, the protective tube is rotated to scrape off the residual oil mist on the outer wall of the half of the protective sleeve that is not connected to the first through hole at any time, so that the oil mist can smoothly enter the protective tube without affecting the oil mist detection.

[0021] A discharge groove is arranged on the outer wall of the protective sleeve, which can smoothly discharge the residual oil.

[0022] If the oil mist concentration is too high, it will also affect the pressure in the crankcase. Under the action of the pressure, the pressure control mechanism will be controlled to alarm the situation. Through the dual coordination of pressure and detection head, the oil mist concentration can be accurately judged.

[0023] Through the sealing state in the protective tube and the cooperation of the conical ring, it can be ensured that the moving contact and the static contact always maintain contact before the pressure in the crankcase returns to the normal range, and the alarm processing continues. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A structural schematic diagram of an embodiment of a multi-cylinder comprehensive alarm crankcase oil mist concentration detection device;

[0025] Figure 2 It is a structural schematic diagram of another angle of an embodiment of a multi-cylinder comprehensive alarm crankcase oil mist concentration detection device;

[0026] Figure 3 It is a structural schematic diagram of part of the conduction control mechanism and part of the protection mechanism in one embodiment of a multi-cylinder comprehensive alarm crankcase oil mist concentration detection device;

[0027] Figure 4 It is a schematic diagram of a partially half-section structure of an embodiment of a multi-cylinder comprehensive alarm crankcase oil mist concentration detection device;

[0028] Figure 5 for Figure 4 A schematic diagram of the structure enlargement at the center A;

[0029] Figure 6 It is a schematic diagram of the connection relationship between some conduction control mechanisms and protection mechanisms in one embodiment of a multi-cylinder comprehensive alarm crankcase oil mist concentration detection device;

[0030] Figure 7 It is a structural schematic diagram of a protection pipe and part of a protection mechanism in one embodiment of a multi-cylinder integrated alarm crankcase oil mist concentration detection device;

[0031] Figure 8 It is a schematic diagram of the explosion structure of part of the conduction control mechanism and part of the protection mechanism in one embodiment of the multi-cylinder comprehensive alarm crankcase oil mist concentration detection device;

[0032] Fig. 9 It is a structural schematic diagram of a part of the conduction control mechanism and the detection head in one embodiment of a multi-cylinder comprehensive alarm crankcase oil mist concentration detection device;

[0033] Fig.10 The diagram is a schematic diagram of the explosion structure of a partial conduction control mechanism in one embodiment of a multi-cylinder integrated alarm crankcase oil mist concentration detection device.

[0034] In the figure: 1. base; 2. fixing rod; 3. protection tube; 301. first straight groove; 302. first spiral groove; 303. second straight groove; 304. second spiral groove; 4. first through hole; 5. guide column; 6. magnetic ring; 601. annular slide groove; 7. movable sleeve; 8. limit block; 9. first spring; 10. support rod; 11. movable ring; 12. support ring; 13. protection sleeve; 14. second through hole; 15. annular discharge groove; 16. vertical discharge groove; 17. fixing ring; 18. second spring; 19. support plate; 20. receiving rod; 21. detection head; 22. supporting sleeve; 23. moving contact; 24. static contact; 25. sealing disk; 26. fixing sleeve; 27. movable rod; 28. third spring; 29. ​​limit wheel; 30. conical ring. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0037] See also Figure 1 to Figure 10In an embodiment of the present invention, a multi-cylinder integrated alarm crankcase oil mist concentration detection device comprises: a base 1, and a fixed rod 2 fixedly mounted on the base 1, a protective tube 3 is rotatably mounted on the end of the fixed rod 2, and a plurality of first through holes 4 evenly distributed are opened on the circumferential outer wall of the protective tube 3; wherein, when the diesel engine is operating normally, the oil mist concentration in the crankcase is generally maintained in a relatively low concentration value range. However, when the connecting rod components (including crosshead guides, bushings, piston bearings, etc.) leak excessively due to overheating or piston ring damage, the oil mist concentration in the crankcase will be seriously high. If the temperature in the crankcase reaches the ignition point or there is a fire source, it is very easy to cause an explosion. Therefore, it is necessary to detect the oil mist concentration. However, if the oil splashes onto the detection sensor, it is easy to be contaminated and cause an increase in opacity, which in turn easily causes a false alarm of high oil mist concentration and even causes the main engine to stop. Therefore, under the action of the protective tube 3 and the first through hole 4, it can be ensured that the detection sensor will not be contaminated by oil. Among them, the first through holes 4 are equidistantly distributed around the circumference and are only opened on the circumferential half side of the protective tube 3.

[0038] Also includes: See Figure 1-Figure 4 , Figure 6-Figure 8 , a protective mechanism is arranged on the base 1 and connected to the protective tube 3, the protective mechanism includes a guide column 5 fixedly mounted on the base 1 and symmetrically arranged, a fixing ring 17 is fixed on the guide column 5, a support ring 12 slidably mounted on the guide column 5 and slidably connected to the protective tube 3, a second spring 18 abutting against the support ring 12 is sleeved on the guide column 5, and a driven component connected to the protective tube 3 is arranged on the support ring 12, wherein the driven component includes a protective sleeve 13 fixedly mounted on the support ring 12 and slidably connected to the protective tube 3, a plurality of second through holes 14 evenly distributed are opened on the circumferential outer wall of the protective sleeve 13, the second through holes 14 cooperate with the first through holes 4, and an annular discharge groove 15 and a vertical discharge groove 16 are also opened on the protective sleeve 13, and the upper part of the vertical discharge groove 16 is connected to the annular discharge groove 15.

[0039] In detail, in the initial state, under the action of the conduction regulating mechanism, the support ring 12 is located at the end of the stroke in the direction of the base 1, so that the protective sleeve 13 is located at the end of the stroke in the direction of the base 1. At this time, the second through hole 14 is in a separated state from the first through hole 4, ensuring that the first through hole 4 is in a blocked state, and the second spring 18 is in a compressed state. When it is necessary to detect the oil mist concentration, at this time, the conduction regulating mechanism works, so that the conduction regulating mechanism no longer restricts the position of the support ring 12, and the second spring 18 is elastically released. , and drives the support ring 12 to move in a direction away from the base 1. The support ring 12 also drives the protective sleeve 13 to move, so that the second through hole 14 moves toward a position matching with the first through hole 4. When the second through hole 14 moves to a position connected with the first through hole 4, the support ring 12 just moves to a position abutting against the fixing ring 17, so that the position of the protective sleeve 13 no longer changes. At this time, the oil mist in the crankcase can enter the protective tube 3 through the first through hole 4 and the second through hole 14, and under the action of the detection head 21, the oil mist concentration is detected.

[0040] Among them, the annular discharge groove 15 and the vertical discharge groove 16 are used to guide the oil splashed to the protective sleeve 13 and remaining thereon. When the conduction and control mechanism moves, the oil can also be scraped off. The scraped oil will enter the annular discharge groove 15 and be discharged through the vertical discharge groove 16, thereby avoiding the problem of low accuracy of oil mist concentration detection caused by excessive residual oil causing the second through hole 14 to be blocked.

[0041] See also Figure 1-Figure 4 , Figure 6-Figure 8The protection tube 3 is provided with a conduction regulating mechanism connected to the protection mechanism, and the protection mechanism can be actuated when the conduction regulating mechanism moves to adjust the conduction state of the first through hole 4, and the conduction regulating mechanism includes a guide groove provided on the outer wall of the protection tube 3, and a movable sleeve 7 is slidably mounted on the protection tube 3, and a limit block 8 slidably connected to the guide groove is fixed on the inner wall of the movable sleeve 7, and a support assembly connected to the support ring 12 is provided on the movable sleeve 7, wherein the support assembly includes a magnetic ring 6 slidably mounted on the guide column 5 and fixedly connected to the movable sleeve 7, and an annular slide groove 601 is provided on the magnetic ring 6 A symmetrically arranged support rod 10 is slidably installed in the annular slide groove 601, and the support rod 10 is slidably connected to the protective tube 3. A movable ring 11 is fixed to the end of the support rod 10 away from the magnetic ring 6, and the movable ring 11 is in contact with the support ring 12, and one half of the movable ring 11 is in contact with the surface of the protective sleeve 13. An elastic structure connected with the magnetic ring 6 is provided on the guide column 5. As mentioned above, the elastic structure includes a support plate 19 fixedly installed at the end of the guide column 5, and a first spring 9 is sleeved on the guide column 5, and the two ends of the first spring 9 are respectively in contact with the support plate 19 and the magnetic ring 6.

[0042] It should be noted that an electromagnetic structure is installed in the crankcase, and the magnetic ring 6 is made of magnetic material. The magnetic ring 6 can be controlled to move along the length direction of the guide column 5 by electromagnetic attraction. The guide groove can be divided into multiple sections, namely the first straight groove 301, the first spiral groove 302, the second straight groove 303, and the second spiral groove 304. The two ends of the first spiral groove 302 are connected to the first straight groove 301 and the second straight groove 303 respectively, and the two ends of the second spiral groove 304 are connected to the middle part of the first straight groove 301 and the second straight groove 303 respectively. The number of spiral turns of the first spiral groove 302 and the second spiral groove 304 is half a turn, and the second through holes 14 are distributed circumferentially on the protective sleeve 13. In the initial state, the second spring 18 is in a compressed state, and the second The elastic potential energy of the spring 18 is greater than the elastic potential energy of the first spring 9, so that the magnetic ring 6 is located at the end of the stroke toward the base 1. The magnetic ring 6 can control the limit block 8 to be located at the end of the stroke on one side of the first straight groove 301 through the movable sleeve 7. The magnetic ring 6 can also control the movable ring 11 to be located at the abutment position with the support ring 12 through the support rod 10, so as to block the first through hole 4 through the protective sleeve 13. When it is necessary to detect the oil mist concentration, the electromagnetic structure works and attracts the magnetic ring 6. The magnetic ring 6 will move along the length direction of the guide column 5, thereby driving the movable sleeve 7 to move. The movable sleeve 7 will also drive the limit block 8 to move along the length direction of the first straight groove 301. The magnetic ring 6 will also drive the support rod 10 to move and drive the movable ring 1 1 movement, at this time, the second spring 18 is elastically released, and drives the support ring 12 to synchronously follow the movable ring 11 to move, when the support ring 12 moves to the position of abutting with the fixed ring 17, the support ring 12 no longer moves, at this time, the movable ring 11 continues to move, because the inner wall of the movable ring 11 is in contact with the outer wall of the protective sleeve 13, only half of the movable ring 11 is in contact with the protective sleeve 13, and the part of the movable ring 11 in contact with the protective sleeve 13 is located on the opposite side of the first through hole 4, when the movable ring 11 and the protective sleeve 13 are relatively displaced, under the action of the movable ring 11, the oil remaining on half of the outer wall of the protective sleeve 13 is scraped off, and when the movable ring 11 passes over the second through hole 14, the limit block 8 just moves to the first straight groove 301 and the first spiral groove 30 2 is connected, at this time, the limit block 8 will enter the first spiral groove 302, so that the protection tube 3 rotates, so that the second through hole 14, which is half of the scraped residual oil, moves toward the connection position with the first through hole 4. When the protection tube 3 rotates, it will also drive the support rod 10 to slide in the annular groove 601, so as to drive the movable ring 11 to rotate synchronously with the protection tube 3, so that the movable ring 11 will only process the protection sleeve 13 on the side of the second through hole 14 in the blocked state, to ensure that when the oil on the outer wall of the protection sleeve 13 is scraped again later, the movable ring 11 will not interfere with the second through hole 14 in the conductive state, so as to ensure that the normal circulation of the oil mist will not be affected. When the limit block 8 moves to the connection position between the first spiral groove 302 and the second straight groove 303,When the protection tube 3 rotates half a circle, the magnetic ring 6 stops moving, and one half of the second through holes 14 opened on the protection sleeve 13 moves to the connection position with the first through hole 4. At this time, the oil mist can smoothly pass through the second through holes 14 and the first through holes 4 into the protection tube 3 and be detected by the detection head 21.

[0043] Preferably, as the detection time increases, in order to prevent the second through hole 14 from being blocked by oil again, the oil needs to be scraped off again. At this time, the magnetic force provided to the magnetic attraction ring 6 by the electromagnetic structure is reduced, so that the first spring 9 is elastically released, so that the limit block 8 moves along the length direction of the second straight groove 303, and under the action of the movable ring 11, the other half of the protective sleeve 13 is scraped off. When the limit block 8 disengages from the second straight groove 303 and enters the second spiral groove 304, the protective tube 3 rotates again, so that the other half of the second through hole 14 after the oil is scraped off moves to a position that cooperates with the first through hole 4, and under the action of the electromagnetic force, the limit block 8 will only move to the connection position between the second spiral groove 304 and the first straight groove 301, ensuring that the movable ring 11 will not abut against the support ring 12, causing the second through hole 14 to separate from the first through hole 4. At this time, the protective tube 3 just rotates half a circle again.

[0044] The receiving rod 20 is rotatably mounted on the protective tube 3 and connected to the conduction regulating mechanism. A detection head 21 is fixed to the end of the receiving rod 20. The detection head 21 is used to detect the oil mist concentration in the crankcase. This is an application of the prior art and will not be elaborated in this application.

[0045] See also Figure 4 , Figure 5 , Fig. 9 , Fig.10, a pressure regulating mechanism is arranged in the protection tube 3 and connected to the receiving rod 20, the pressure regulating mechanism can be activated when the first through hole 4 is connected, and an alarm is processed according to the pressure in the protection tube 3, the pressure regulating mechanism includes a support sleeve 22 slidably mounted on the receiving rod 20, a sealing disk 25 slidably connected to the receiving rod 20 is fixed on the support sleeve 22, a conical ring 30 is fixed in the protection tube 3, and a connection component connected to the conical ring 30 is arranged on the support sleeve 22, wherein the connection component includes a fixedly mounted on the support sleeve 22 The protective tube 3 is provided with a moving contact 23, a stationary contact 24 cooperating with the moving contact 23 is fixed in the protective tube 3, a limiting structure connected with the conical ring 30 is arranged on the supporting sleeve 22, and the limiting structure mentioned above comprises a fixed sleeve 26 fixedly mounted on the supporting sleeve 22, a movable rod 27 is slidably mounted in the fixed sleeve 26, a limiting wheel 29 is rotatably mounted on one end of the movable rod 27 away from the fixed sleeve 26, and the limiting wheel 29 is in abutment with the conical ring 30, and a third spring 28 abutting with the limiting wheel 29 is sleeved on the movable rod 27 and the fixed sleeve 26.

[0046] Furthermore, the conical ring 30 is arranged in a triangular inclined ring shape, and the inclination angle of the upper inclined part of the conical ring 30 is greater than the inclination angle of the lower inclined part. The space above the sealing disk 25 in the protective tube 3 is in a closed state. In the initial state, the air pressures in the upper and lower spaces of the sealing disk 25 are the same. The sealing disk 25 is located at the end of the stroke in the direction of the detection head 21, the moving contact 23 and the static contact 24 are in a separated state, and the third spring 28 is in a compressed state, so that the movable rod 27 is located at the end of the stroke away from the fixed sleeve 26, so that the limiting wheel 29 abuts against the inner wall of the protective tube 3. When it is necessary to detect the oil mist concentration, the first through hole 4 and the second through hole 14 will be connected, and the oil mist will enter the protective tube 3 through the first through hole 4 and the second through hole 14. Under the action of, the oil mist concentration is detected. If the oil mist concentration is too high, it will cause the pressure in the crankcase to increase. When the first through hole 4 and the second through hole 14 are connected, the pressure in the protective tube 3 will increase synchronously. Under the action of air pressure, the sealing disk 25 is pushed to move in the direction away from the detection head 21, thereby driving the fixed sleeve 26 and the moving contact 23 to move. The fixed sleeve 26 will also drive the limiting wheel 29 to move through the movable rod 27. When the limiting wheel 29 moves to the position abutting against the conical ring 30, the limiting wheel 29 will drive the movable rod 27 to move toward the fixed sleeve 26. When the limiting wheel 29 passes the most protruding position of the conical ring 30, it means that the pressure in the crankcase is too high. At this time, the moving contact 23 moves to the position abutting against the static contact 24, and an alarm is processed for this situation.

[0047] Preferably, when the pressure in the crankcase gradually decreases, the sealing disk 25 will tend to move toward the initial position under the push of the pressure above the sealing disk 25. However, due to the large inclination angle of the upper part of the conical ring 30, the limiting wheel 29 is subjected to a large component of force in the horizontal direction when it moves downward. Therefore, the pressure above the sealing disk 25 can push the limiting wheel 29 to pass over the conical ring 30 and move toward the initial position only after the pressure in the crankcase is reduced to a certain level, thereby ensuring that the moving contact 23 and the static contact 24 always remain in contact before the pressure in the crankcase returns to the normal range, and the alarm processing is continued.

[0048] A method for detecting crankcase oil mist concentration with a multi-cylinder integrated alarm comprises the following steps:

[0049] Step 1: Before the oil mist detection starts, under the action of the conduction control mechanism, the first through hole 4 is controlled to be in a blocked state through the protection mechanism to ensure that the oil mist does not enter the protection tube 3;

[0050] Step 2: When it is necessary to detect the oil mist, the protective mechanism moves under the action of the conduction control mechanism to control the first through hole 4 to be in a conduction state. At this time, the oil mist in the crankcase will enter the protective tube 3 through the first through hole 4, and the oil mist concentration will be detected by the detection head 21.

[0051] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0052] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A multi-cylinder comprehensive alarm crankcase oil mist concentration detection device, comprising: A base (1), and a fixing rod (2) fixedly mounted on the base (1), a protective tube (3) being rotatably mounted on the end of the fixing rod (2), and a plurality of evenly distributed first through holes (4) being formed on the circumferential outer wall of the protective tube (3); The invention is characterized in that it also comprises: a protection mechanism, which is arranged on the base (1) and connected to the protection tube (3); the protection tube (3) is provided with a conduction regulating mechanism connected to the protection mechanism, and the protection mechanism can be actuated when the conduction regulating mechanism moves to adjust the conduction state of the first through hole (4); a receiving rod (20), which is rotatably mounted on the protection tube (3) and connected to the conduction regulating mechanism, and a detection head (21) is fixed to the end of the receiving rod (20); and a pressure regulating mechanism, which is arranged in the protection tube (3) and connected to the receiving rod (20); the pressure regulating mechanism can be actuated when the first through hole (4) is conducted, and adjusts the conduction state of the first through hole (4) according to the conduction regulating mechanism of the protection tube (3). The protective mechanism comprises a guide column (5) fixedly mounted on the base (1) and symmetrically arranged, a fixing ring (17) being fixed on the guide column (5), a support ring (12) slidably mounted on the guide column (5) and slidably connected to the protective tube (3), a second spring (18) abutting against the support ring (12) being sleeved on the guide column (5), a driven component connected to the protective tube (3) being arranged on the support ring (12); the driven component comprises a protective sleeve (13) fixedly mounted on the support ring (12) and slidably connected to the protective tube (3), the circular shape of the protective sleeve (13) A plurality of second through holes (14) are evenly distributed on the outer wall, the second through holes (14) cooperate with the first through holes (4), the protective sleeve (13) is also provided with an annular discharge groove (15) and a vertical discharge groove (16), the upper part of the vertical discharge groove (16) is connected with the annular discharge groove (15); the conduction and regulation mechanism comprises a guide groove provided on the outer wall of the protective tube (3), a movable sleeve (7) is slidably mounted on the protective tube (3), a limit block (8) slidably connected to the guide groove is fixed on the inner wall of the movable sleeve (7), and a support component connected to the support ring (12) is provided on the movable sleeve (7); the support component includes: The invention comprises a magnetic ring (6) which is slidably mounted on the guide column (5) and fixedly connected to the movable sleeve (7), the magnetic ring (6) being provided with an annular groove (601), a symmetrically arranged support rod (10) being slidably mounted in the annular groove (601), the support rod (10) being slidably connected to the protective tube (3), a movable ring (11) being fixed to one end of the support rod (10) which is away from the magnetic ring (6), the movable ring (11) being in abutment with the support ring (12), and one half of the movable ring (11) being in contact with the surface of the protective sleeve (13), and an elastic structure connected to the magnetic ring (6) being provided on the guide column (5).

2. The multi-cylinder comprehensive alarm crankcase oil mist concentration detection device according to claim 1 is characterized in that: The elastic structure comprises a support plate (19) fixedly mounted on the end of the guide column (5); a first spring (9) is sleeved on the guide column (5); two ends of the first spring (9) are respectively in contact with the support plate (19) and the magnetic attraction ring (6).

3. The multi-cylinder comprehensive alarm crankcase oil mist concentration detection device according to claim 1 is characterized in that: The pressure regulating mechanism comprises a supporting sleeve (22) slidably mounted on the receiving rod (20), a sealing disk (25) slidably connected to the receiving rod (20) being fixed on the supporting sleeve (22), a conical ring (30) being fixed in the protective tube (3), and a connecting assembly connected to the conical ring (30) being provided on the supporting sleeve (22).

4. The multi-cylinder comprehensive alarm crankcase oil mist concentration detection device according to claim 3 is characterized in that: The connection assembly comprises a moving contact (23) fixedly mounted on the support sleeve (22), a stationary contact (24) cooperating with the moving contact (23) is fixed in the protection tube (3), and a limiting structure connected to the conical ring (30) is provided on the support sleeve (22).

5. The multi-cylinder comprehensive alarm crankcase oil mist concentration detection device according to claim 4 is characterized in that: The limiting structure comprises a fixed sleeve (26) fixedly mounted on the supporting sleeve (22), a movable rod (27) being slidably mounted in the fixed sleeve (26), a limiting wheel (29) being rotatably mounted on one end of the movable rod (27) away from the fixed sleeve (26), the limiting wheel (29) being in abutment with the conical ring (30), and a third spring (28) being in abutment with the limiting wheel (29) being sleeved on the movable rod (27) and the fixed sleeve (26).

6. A method for detecting the oil mist concentration of a multi-cylinder integrated alarm crankcase, using the multi-cylinder integrated alarm crankcase oil mist concentration detection device as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: before the oil mist is detected, the first through hole (4) is controlled by the protective mechanism to be in a blocked state under the action of the conduction control mechanism, so as to ensure that the oil mist does not enter the protective tube (3); Step 2: When it is necessary to detect the oil mist, the protective mechanism is moved under the action of the conduction control mechanism to control the first through hole (4) to be in a conduction state. At this time, the oil mist in the crankcase will enter the protective tube (3) through the first through hole (4), and the concentration of the oil mist will be detected by the detection head (21).

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