Oil smoke detection system based on oil smoke impact retention, balance circuit and algorithm compensation

Abstract

The invention discloses an oil fume detection system based on oil fume impact retention, balance circuit and algorithm compensation, including an oil fume impact retention detection probe, the oil fume impact retention detection probe includes a probe front section and a probe rear section that are connected to each other; the probe front section has an air storage cavity inside, the cross-sectional shape of the air storage cavity is a rhombus structure, and the oil fume that impacts and enters the air storage cavity from the air inlet is guided and impacted along the inner cavity wall of the air storage cavity and is in a retained state; it also includes a smoke guide pipe, a balance box connected to the smoke guide pipe, and a fan installed on the smoke exhaust pipe; the two ends of the smoke guide pipe are respectively connected to the smoke exhaust pipe located at the front end of the fan to form a complete oil fume diversion circuit; it also includes an algorithm compensation program, through which the detection value of the oil fume detector is compensated to reduce the defect of small oil fume detection value caused by negative pressure. The invention can greatly reduce the negative pressure effect and improve the detection accuracy.

Description

Technical Field

[0001] The present invention belongs to the technical field of oil fume detection, and in particular relates to an oil fume detection system based on oil fume impact retention, a balance circuit and algorithm compensation. Background Art

[0002] In the process of oil fume detection, an oil fume detector is needed for detection. The difficulty of oil fume detection is that the front end cannot measure data because the data value is small due to the influence of negative pressure. In addition, the detection probe of the existing oil fume detector has an unreasonable structural design, which causes the oil fume to flow in and out directly, resulting in a small amount of oil fume entering (insufficient), which has a great impact on the progress of precise measurement. In addition, the harsh environment in the exhaust pipe will also cause great impact damage to the detection probe, reduce its service life, and affect the detection accuracy. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the oil fume detection system based on oil fume impact retention, balance circuit and algorithm compensation provided by the present invention can greatly reduce the influence of negative pressure and improve the detection accuracy.

[0004] Technical solution: To achieve the above-mentioned purpose, the oil fume detection system based on oil fume impact retention, balance circuit and algorithm compensation of the present invention includes an oil fume detector, and the oil fume detector includes an oil fume impact retention detection probe; the oil fume impact retention detection probe includes a probe front section and a probe rear section that are connected to each other; the front section of the probe has an air storage cavity inside, and the side of the front section of the probe has an air inlet and an air outlet that are respectively connected to the air storage cavity, and the cross-sectional shape of the air storage cavity is a diamond structure, and the oil fume that impacts the air storage cavity from the air inlet is diverted and impacted along the inner cavity wall of the air storage cavity and is in a retained state;

[0005] It also includes a smoke guide pipe, a balance box connected to the smoke guide pipe, and a fan installed on the smoke exhaust pipe; the two ends of the smoke guide pipe are respectively connected to the smoke exhaust pipe located at the front end of the fan to form a complete oil smoke diversion circuit; the oil smoke impact retention type detection probe is equipped with a probe flange, the oil smoke impact retention type detection probe is installed on the balance box through the probe flange, and the front section of the oil smoke impact retention type detection probe extends into the balance box;

[0006] It also includes an algorithm compensation program, through which the detection value of the oil smoke detector is compensated to reduce the influence of negative pressure on oil smoke detection.

[0007] The calculation equation of the algorithm compensation procedure is as follows:

[0008] Calculation equation 1 with the fan flow rate as a variable:

[0009] y1=λ1×Inc×r

[0010] Calculation equation 2 with the distance between the fan and the smoke duct as a variable:

[0011]

[0012] Calculation equation 3 with the length of the smoke duct as a variable:

[0013]

[0014] Fit equation 1, equation 2 and equation 3:

[0015]

[0016] Among them: y is the oil smoke concentration, r is the data output value of the oil smoke sensor of the oil smoke impact retention detection probe, c is the flow rate of the fan, d is the distance between the fan and the smoke guide pipe, and l is the length of the smoke guide pipe.

[0017] Furthermore, the end of the front section of the probe that is docked with the rear section of the probe has a docking contraction end, and the front section of the probe is inserted into the rear section of the probe through the docking contraction end to achieve docking;

[0018] The air storage chamber includes a first conical chamber and a second conical chamber, the first conical chamber and the second conical chamber are connected through the bottom surface to form an integral connection; the tip of the second conical chamber passes through the docking contraction end to form a connecting hole, and the air storage chamber is connected with the internal oil fume detection space of the rear section of the probe through the connecting hole.

[0019] Further, the air inlet is communicated with the first conical cavity, the air outlet is communicated with the second conical cavity, and the air inlet and the air outlet are staggered with each other in the axial direction of the front section of the probe;

[0020] Furthermore, the distance between the air inlet and the central axis of the front section of the probe is L1, the distance between the air outlet and the central axis of the front section of the probe is L2, and L1 and L2 satisfy: L1﹤L2.

[0021] Furthermore, the angle between the inner wall of the first conical cavity and the central axis of the front section of the probe is α, the angle between the inner wall of the second conical cavity and the central axis of the front section of the probe is β, both α and β are acute angles, and α and β satisfy: α﹤β.

[0022] Furthermore, there is at least one air inlet and one air outlet, and the air inlet surface of the air inlet is larger than the air outlet surface of the air outlet;

[0023] Furthermore, the air inlet matching cover is provided with a metal mesh.

[0024] Furthermore, the probe flange is sleeved on the rear section of the probe, a mounting hole is provided on the outer ring portion of the probe flange, and a positioning screw is threadedly connected on the inner ring portion of the probe flange. The probe flange can be moved along the axial direction of the rear section of the probe to adjust the position and is fixed by the positioning screw; an annular groove is provided on the end face of the inner ring portion of the probe flange close to the front section of the probe, a silicone thermal insulation pad is snapped into the annular groove, and the silicone thermal insulation pad partially protrudes from the outside of the annular groove.

[0025] Beneficial effects: The oil fume detection system based on oil fume impact retention, balance circuit and algorithm compensation of the present invention has the following beneficial effects:

[0026] 1) The structural design of the fume impact retention detection probe, the addition of a balance box, and the compensation of the algorithm compensation program are combined to minimize the impact of negative pressure on fume detection, thereby greatly improving the detection accuracy;

[0027] 2) The oil smoke that enters the air storage cavity from the air inlet flows along the inner wall of the air storage cavity and is retained, thereby extending the residence time of the oil smoke in the air storage cavity, allowing more oil smoke to enter the internal oil smoke detection space of the rear section of the probe for detection, greatly improving the detection accuracy;

[0028] 3) Introducing the oil smoke in the exhaust pipe into the balance box for detection can improve the detection environment, prevent the oil smoke detection probe from being damaged by the harsh environment in the exhaust pipe and the impact of oil smoke, and improve the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Attached Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Attached Figure 2 This is a structural schematic diagram of a smoke impact retention detection probe;

[0031] Attached Figure 3 It is a schematic diagram of the structure of the front section of the probe;

[0032] Attached Figure 4 Cross-section of the front section of the probe Figure 1 ;

[0033] Attached Figure 5 Cross-section of the front section of the probe Figure 2 ;

[0034] Attached Figure 6 This is a schematic diagram of the structure of the probe flange. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] As attached Figure 1As shown, the oil smoke detection system based on oil smoke collision retention, balance circuit and algorithm compensation includes an oil smoke detector 100, the oil smoke detector 100 includes an oil smoke collision retention detection probe 10; the oil smoke collision retention detection probe 10 includes a probe front section 2 and a probe rear section 1 that are connected to each other; the probe front section 2 has an air storage cavity 20 inside, and the side of the probe front section 2 has an air inlet 2a and an air outlet 2b that are respectively connected to the air storage cavity 20, and the cross-sectional shape of the air storage cavity 20 is a diamond structure 200, and the oil smoke that impacts and enters the air storage cavity 20 from the air inlet 2a is guided along the inner cavity wall of the air storage cavity 20 and is in a retention state, thereby extending the residence time of the oil smoke in the air storage cavity 20, allowing more oil smoke to enter the internal oil smoke detection space of the probe rear section 1 to be detected, and greatly improving the detection accuracy. In addition, the oil smoke enters the probe rear section 1 by collision, and overcomes a part of the negative pressure to enter the internal oil smoke detection space of the probe rear section 1.

[0037] It also includes a smoke guide pipe 8, a balance box 9 connected to the smoke guide pipe 8, and a fan 6 installed on the smoke exhaust pipe 7; the two ends of the smoke guide pipe 8 are respectively connected to the smoke exhaust pipe 7 located at the front end of the fan 6 to form a complete oil smoke diversion circuit; the oil smoke impact retention type detection probe 10 is equipped with a probe flange 3, the oil smoke impact retention type detection probe 10 is installed on the balance box 9 through the probe flange 3, and the probe front section 2 of the oil smoke impact retention type detection probe 10 extends into the balance box 9, and the oil smoke in the smoke exhaust pipe 7 is introduced into the balance box 9 for detection, which can improve the detection environment, avoid the oil smoke detection probe 1 from being damaged by the harsh environment in the smoke exhaust pipe 7 and the impact of the oil smoke, and improve the detection accuracy. In addition, after the oil smoke in the smoke exhaust pipe 7 is introduced into the balance box 9, the influence of the negative pressure state in the smoke exhaust pipe 7 will be reduced.

[0038] It also includes an algorithm compensation program, through which the detection value of the oil smoke detector 100 is compensated to reduce the influence of negative pressure on oil smoke detection.

[0039] Through the structural design of the oil smoke impact retention detection probe 10, the addition of the balance box 9 and the compensation of the algorithm compensation program, the three are combined to minimize the influence of negative pressure on oil smoke detection, thereby greatly improving the detection accuracy.

[0040] The calculation equation of the algorithm compensation procedure is as follows:

[0041] Other conditions are fixed, and the flow rate of fan 6 is used as the variable to calculate equation 1:

[0042] y1=λ1×Inc×r

[0043] If other conditions are constant, the calculation equation 2 with the distance between the fan 6 and the smoke guide pipe 8 as the variable is:

[0044]

[0045] Other conditions are constant, and the length of the smoke guide tube 8 is used as a variable to calculate equation 3:

[0046]

[0047] Fit equation 1, equation 2 and equation 3:

[0048]

[0049] Among them: y is the oil smoke concentration, r is the data output value of the oil smoke sensor of the oil smoke impact retention detection probe 10, c is the flow rate of the fan 6, d is the distance between the fan 6 and the smoke guide pipe 8, and l is the length of the smoke guide pipe 8.

[0050] This prolongs the residence time of the oil smoke in the gas storage chamber 20, allowing more oil smoke to enter the internal oil smoke detection space of the probe rear section 1 for detection, thereby greatly improving the detection accuracy.

[0051] As attached Figure 3 As shown, the end of the probe front section 2 docked with the probe rear section 1 has a docking contraction end 23, and the probe front section 2 is inserted into the probe rear section 1 through the docking contraction end 23 to achieve docking, thereby improving the convenience of assembling the probe front section 2 and the probe rear section 1.

[0052] More specifically, the air storage chamber 20 includes a first conical chamber 21 and a second conical chamber 22, and the first conical chamber 21 and the second conical chamber 22 are connected to each other through the bottom surface to form an integral connection; the tip of the second conical chamber 22 passes through the docking contraction end 23 to form a connecting hole 2c, and the air storage chamber 20 is connected to the internal oil fume detection space of the probe rear section 1 through the connecting hole 2c. The oil fume in the air storage chamber 20 enters the internal oil fume detection space of the probe rear section 1 through the connecting hole 2c, and then flows back to the air storage chamber 20 through the connecting hole 2c, and is finally discharged from the air outlet 2b.

[0053] As attached Figure 5 As shown, the air inlet 2a is connected to the first conical cavity 21, and the air outlet 2b is connected to the second conical cavity 22. The air inlet 2a and the air outlet 2b are staggered with each other in the axial direction of the probe front section 2 to prevent the oil smoke from directly convecting to the air outlet 2b for discharge, thereby improving the detection accuracy.

[0054] Among them, the distance between the air inlet 2a and the central axis 25 of the probe front section 2 is L1, the distance between the air outlet 2b and the central axis 25 of the probe front section 2 is L2, and L1 and L2 satisfy: L1﹤L2, ensuring that the oil smoke is discharged after swirling and guiding in the air storage chamber 20, increasing the guiding stroke to improve the measurement accuracy.

[0055] The angle between the inner wall of the first conical cavity 21 and the central axis 25 of the probe front section 2 is α, and the angle between the inner wall of the second conical cavity 22 and the central axis 25 of the probe front section 2 is β. Both α and β are acute angles, and α and β satisfy: α﹤β, ensuring that the oil smoke guided into the second conical cavity 22 can hit its inner wall.

[0056] As a preference, there is at least one air inlet 2a and one air outlet 2b, and the air inlet surface of the air inlet 2a is larger than the air outlet surface of the air outlet 2b, so as to ensure that the air inlet is larger than the air outlet and improve the detection accuracy.

[0057] More specifically, the air inlet 2a is covered with a metal mesh 24 to effectively filter large diameter particles of smoke, so that the detection probe can effectively resist the oil smoke pollution.

[0058] As attached Figure 6 As shown, the probe flange 3 is sleeved on the probe rear section 1, a mounting hole 31 is opened on the outer ring of the probe flange 3, and a positioning screw 4 is threadedly connected on the inner ring of the probe flange 3. The probe flange 3 can be moved along the axial direction of the probe rear section 1 to adjust the position and is fixed by the positioning screw 4; thereby improving the convenience of installation of the oil smoke impact retention detection probe 10.

[0059] An annular groove 32 is provided on the end surface of the inner ring of the probe flange 3 near the front section 2 of the probe, and a silicone heat insulation pad 33 is clamped in the annular groove 32, and the silicone heat insulation pad 33 partially protrudes from the outside of the annular groove 32. The silicone heat insulation pad 33 can be provided to insulate and protect the oil smoke impact retention type detection probe 10 on the one hand, and can buffer and prevent vibration on the other hand to ensure the stability of the oil smoke impact retention type detection probe 10 installed on the exhaust pipe.

[0060] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. The oil smoke detection system based on oil smoke impact retention, balance circuit and algorithm compensation is characterized by: The oil smoke detector (100) comprises an oil smoke impact and retention detection probe (10); the oil smoke impact and retention detection probe (10) comprises a probe front section (2) and a probe rear section (1) which are connected to each other; the probe front section (2) has an air storage cavity (20) inside, and the side of the probe front section (2) has an air inlet (2a) and an air outlet (2b) which are respectively connected to the air storage cavity (20); the cross-sectional shape of the air storage cavity (20) is a rhombus structure (200), and the oil smoke that impacts the air storage cavity (20) from the air inlet (2a) and enters the air storage cavity (20) is guided and impacted along the inner cavity wall of the air storage cavity (20) and is in a retained state; It also comprises a smoke guide pipe (8), a balance box (9) connected to the smoke guide pipe (8), and a fan (6) installed on the smoke exhaust pipe (7); the two ends of the smoke guide pipe (8) are respectively connected to the smoke exhaust pipe (7) located at the front end of the fan (6) to form a complete oil smoke diversion circuit; the oil smoke impact retention type detection probe (10) is equipped with a probe flange (3), the oil smoke impact retention type detection probe (10) is installed on the balance box (9) through the probe flange (3), and the probe front section (2) of the oil smoke impact retention type detection probe (10) extends into the balance box (9); It also includes an algorithm compensation program, through which the detection value of the oil smoke detector (100) is compensated to reduce the influence of negative pressure on oil smoke detection; The calculation equation of the algorithm compensation procedure is as follows: The calculation equation 1 with the flow rate of the fan (6) as a variable is: y1=λ1×Inc×r Calculation equation 2 using the distance between the fan (6) and the smoke guide pipe (8) as a variable: Calculation equation 3 with the length of the smoke guide tube (8) as a variable: Fit equation 1, equation 2 and equation 3: Wherein: y is the oil smoke concentration, r is the data output value of the oil smoke sensor of the oil smoke impact retention detection probe (10), c is the flow rate of the fan (6), d is the distance between the fan (6) and the smoke guide pipe (8), and l is the length of the smoke guide pipe (8).

2. The oil smoke detection system based on oil smoke impact retention, balance circuit and algorithm compensation according to claim 1 is characterized in that: The end of the probe front section (2) docked with the probe rear section (1) has a docking contraction end (23), and the probe front section (2) is inserted into the probe rear section (1) through the docking contraction end (23) to achieve docking; The gas storage cavity (20) comprises a first conical cavity (21) and a second conical cavity (22); the first conical cavity (21) and the second conical cavity (22) are connected to each other through their bottom surfaces to form an integral communication state; the tip of the second conical cavity (22) penetrates the butt-jointed contraction end (23) to form a communication hole (2c); the gas storage cavity (20) is connected to the internal oil smoke detection space of the rear section (1) of the probe through the communication hole (2c).

3. The oil smoke detection system based on oil smoke impact retention, balance circuit and algorithm compensation according to claim 2 is characterized in that: The air inlet (2a) is in communication with the first conical cavity (21), and the air outlet (2b) is in communication with the second conical cavity (22); the air inlet (2a) and the air outlet (2b) are staggered with each other in the axial direction of the probe front section (2).

4. The oil smoke detection system based on oil smoke impact retention, balance circuit and algorithm compensation according to claim 3 is characterized in that: The distance between the air inlet (2a) and the central axis (25) of the front section (2) of the probe is L1, and the distance between the air outlet (2b) and the central axis (25) of the front section (2) of the probe is L2, and L1 and L2 satisfy: L1﹤L2.

5. The oil smoke detection system based on oil smoke impact retention, balance circuit and algorithm compensation according to claim 4 is characterized in that: The angle between the inner wall of the first conical cavity (21) and the central axis (25) of the front section of the probe (2) is α, and the angle between the inner wall of the second conical cavity (22) and the central axis (25) of the front section of the probe (2) is β. Both α and β are acute angles, and α and β satisfy: α﹤β.

6. The oil smoke detection system based on oil smoke impact retention, balance circuit and algorithm compensation according to claim 4 is characterized in that: There is at least one air inlet (2a), one air outlet (2b), and the air inlet surface of the air inlet (2a) is larger than the air outlet surface of the air outlet (2b).

7. The oil smoke detection system based on oil smoke impact retention, balance circuit and algorithm compensation according to claim 6 is characterized in that: The air inlet (2a) is matched with a cover provided with a metal mesh (24).

8. The oil smoke detection system based on oil smoke impact retention, balance circuit and algorithm compensation according to claim 7 is characterized in that: The probe flange (3) is sleeved on the probe rear section (1), a mounting hole (31) is provided on the outer ring of the probe flange (3), a positioning screw (4) is threadedly connected on the inner ring of the probe flange (3), and the probe flange (3) can be moved along the axial direction of the probe rear section (1) to adjust the position and is fixed by the positioning screw (4); an annular groove (32) is provided on the end face of the inner ring of the probe flange (3) close to the probe front section (2), a silicone thermal insulation pad (33) is snapped into the annular groove (32), and the silicone thermal insulation pad (33) partially protrudes from the outside of the annular groove (32).

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