Reliability detection device for exhaust gas recirculation valve of engine

Abstract

The utility model relates to the technical field of detection equipment, and discloses a reliability detection device for an engine exhaust gas recirculation valve, which comprises a detection mechanism, a main body mechanism and a connecting mechanism, the detection mechanism is positioned in the main body mechanism, the connecting mechanism is positioned at the left end of the main body mechanism, and the detection mechanism comprises a mounting pipe. A fixing block is fixedly connected to the surface of the mounting pipe, a sealing gasket is arranged at the upper end of the fixing block, a protruding block is fixedly connected to the inner wall of the mounting pipe, a fixing rod is fixedly connected to the top of the protruding block, a rotating shaft is rotatably connected to the top of the fixing rod, and fan blades are fixedly connected to the surface of the rotating shaft. And the top of the rotating shaft is fixedly connected with a photoelectric encoder. The installation pipe is taken down from the inner wall of the gas outlet pipe by rotating the installation pipe, the photoelectric encoder is replaced, the photoelectric encoder is convenient to replace, the joint of the installation pipe and the gas outlet pipe is sealed through the sealing gasket during installation, and gas leakage is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a reliability detection device for an engine exhaust gas recirculation valve. Background Art

[0002] The exhaust gas recirculation (EGR) system refers to the process of returning part of the exhaust gas discharged by the automobile engine to the intake manifold and re-entering the cylinder together with the fresh mixture. Since the exhaust gas contains a large amount of CO2, which cannot be burned but absorbs a large amount of heat, the combustion temperature of the mixture in the cylinder is reduced, thereby reducing the amount of NOx generated. The automobile engine exhaust gas recirculation valve (EGR valve) is a control device used to control the cycle of the exhaust gas recirculation (EGR) system.

[0003] The patent application number is CN202022218209.9, which is a detection device for an engine exhaust gas recirculation valve. The exhaust pipe is installed on the side wall of the transition pipe, and a detection component is installed on the inner side of the transition pipe. The detection component can detect whether there is exhaust gas flowing in the transition pipe, and can also detect the exhaust gas flow rate flowing in the transition pipe. The fan blades will rotate driven by the exhaust gas flow, and the rotation of the fan blades drives the rotation of the shaft. A photoelectric encoder is installed at one end of the shaft. The photoelectric encoder can detect the number of rotations of the shaft per unit time through the radio and television effect, thereby judging the exhaust gas flow rate flowing in the transition pipe. The reliability of the exhaust gas recirculation valve has been achieved through simple and quick detection.

[0004] The detection device of the engine exhaust gas recirculation valve can determine the flow rate of the exhaust gas by being arranged in this way, making the detection more convenient. However, when the photoelectric encoder is damaged, it is more troublesome to disassemble and repair the photoelectric encoder because the photoelectric encoder is located inside the transition pipe. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a reliability detection device for an engine exhaust gas recirculation valve.

[0006] The utility model is implemented by the following technical scheme: a reliability detection device for an engine exhaust gas recirculation valve, comprising a detection mechanism, a main body mechanism and a connecting mechanism, wherein the detection mechanism is located inside the main body mechanism, and the connecting mechanism is located at the left end of the main body mechanism;

[0007] The detection mechanism includes a mounting tube, a fixed block is fixedly connected to the surface of the mounting tube, a sealing gasket is arranged on the upper end of the fixed block, a protruding block is fixedly connected to the inner wall of the mounting tube, a fixed rod is fixedly connected to the top of the protruding block, a rotating shaft is rotatably connected to the top of the fixed rod, a fan blade is fixedly connected to the surface of the rotating shaft, and a photoelectric encoder is fixedly connected to the top of the rotating shaft.

[0008] With the above technical solution, the thread provided on the mounting tube facilitates removal from the air outlet pipe.

[0009] As a further improvement of the above solution, the surface of the mounting tube is provided with threads, the sealing gasket is sleeved on the surface of the mounting tube, the number of the fan blades is set to five, and the five fan blades are symmetrically distributed around the rotating shaft.

[0010] Through the above technical solution, the installation pipe and the air outlet pipe are sealed by the sealing gasket to prevent air circulation.

[0011] As a further improvement of the above scheme, the main body mechanism includes a circulation valve, the bottom of the circulation valve is connected to a mounting plate, the bottom of the mounting plate is connected to an exhaust pipe, and an exhaust pipe is provided at the right end of the exhaust pipe.

[0012] Through the above technical solution, the circulation valve is opened so that the exhaust gas flows through the exhaust pipe to the inside of the mounting plate and then is transported to the exhaust pipe.

[0013] As a further improvement of the above solution, the interior of the mounting plate is a cavity structure, the top of the air outlet pipe is communicated with the mounting plate, and the inner wall of the air outlet pipe is threadedly connected to the surface of the mounting pipe.

[0014] As a further improvement of the above solution, the fan blade is located inside the air outlet pipe, and the surface of the sealing gasket is in contact with the inner wall of the air outlet pipe.

[0015] Through the above technical solution, the flow of gas blows the fan blades to drive the shaft to rotate, thereby driving the photoelectric encoder to rotate. The photoelectric encoder detects the number of rotations of the shaft within a certain period of time through the radio and television effect, thereby determining the flow rate of the gas flowing in the trachea.

[0016] As a further improvement of the above solution, the connecting mechanism includes a heat exchanger, the right end of the heat exchanger is connected to the left end of the exhaust pipe, and the left end of the heat exchanger is connected to a connecting pipe.

[0017] Through the above technical solution, the temperature of the exhaust gas is reduced through the heat exchanger.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The utility model provides an installation tube, a fixing block and a sealing gasket, specifically, the installation tube is rotated so that the installation tube is removed from the inner wall of the air outlet pipe, and the photoelectric encoder is replaced, which facilitates the convenience of replacing the photoelectric encoder. During installation, the sealing gasket is used to seal the connection between the installation tube and the air outlet pipe to reduce gas leakage.

[0020] The utility model provides a connection mechanism, specifically, allows the exhaust gas to enter the interior of the heat exchanger through a connection pipe, and reduces the temperature of the exhaust gas through the heat exchanger, thereby reducing the influence or damage to the photoelectric encoder caused by excessive gas temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the cross-sectional structure of the air outlet pipe of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the detection mechanism of the utility model;

[0024] Figure 4 It is a schematic diagram of the overall structure of the utility model.

[0025] Description of main symbols:

[0026] 1. Detection mechanism; 101. Mounting tube; 102. Fixing block; 103. Sealing pad; 104. Projecting block; 105. Fixing rod; 106. Rotating shaft; 107. Fan blade; 108. Photoelectric encoder; 2. Main mechanism; 201. Circulation valve; 202. Mounting plate; 203. Exhaust pipe; 204. Exhaust pipe; 3. Connecting mechanism; 301. Heat exchanger; 302. Connecting pipe. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0028] Example:

[0029] Please combine Figure 1-4 , a reliability detection device for an engine exhaust gas recirculation valve of this embodiment includes a detection mechanism 1, a main body mechanism 2 and a connecting mechanism 3, wherein the detection mechanism 1 is located inside the main body mechanism 2, and the connecting mechanism 3 is located at the left end of the main body mechanism 2;

[0030] The detection mechanism 1 includes a mounting tube 101, a fixed block 102 is fixedly connected to the surface of the mounting tube 101, a sealing gasket 103 is arranged on the upper end of the fixed block 102, a protruding block 104 is fixedly connected to the inner wall of the mounting tube 101, a fixed rod 105 is fixedly connected to the top of the protruding block 104, a rotating shaft 106 is rotatably connected to the top of the fixed rod 105, a fan blade 107 is fixedly connected to the surface of the rotating shaft 106, a photoelectric encoder 108 is fixedly connected to the top of the rotating shaft 106, when gas flows inside the air outlet pipe 204, the fan blade 107 is driven to rotate, so that the rotating shaft 106 is rotated, thereby driving the photoelectric encoder 108 to rotate, and the photoelectric encoder 108 is rotated. The encoder 108 detects the number of rotations of the shaft within a certain period of time through the radio and television effect, thereby determining the flow rate of the gas flowing in the exhaust pipe, thereby realizing the detection of the circulation valve 201. When the number of rotations of the shaft 106 decreases or stops rotating, it is possible to determine whether the circulation valve 201 is damaged, thereby improving the convenience of use. When the photoelectric encoder 108 is damaged, the mounting tube 101 is rotated so that the mounting tube 101 is removed from the inner wall of the exhaust pipe 204, and the photoelectric encoder 108 is replaced, which facilitates the replacement of the photoelectric encoder 108. During installation, the connection between the mounting tube 101 and the exhaust pipe 204 is sealed by the sealing gasket 103 to reduce gas leakage.

[0031] The surface of the mounting tube 101 is provided with threads, and the sealing gasket 103 is sleeved on the surface of the mounting tube 101 . The number of the fan blades 107 is five, and the five fan blades 107 are symmetrically distributed around the rotating shaft 106 .

[0032] The main body mechanism 2 includes a circulation valve 201 , the bottom of the circulation valve 201 is connected to a mounting plate 202 , the bottom of the mounting plate 202 is connected to an exhaust pipe 203 , and an exhaust pipe 204 is provided at the right end of the exhaust pipe 203 .

[0033] The interior of the mounting plate 202 is a hollow structure. The top of the air outlet pipe 204 is connected to the mounting plate 202 . The inner wall of the air outlet pipe 204 is threadedly connected to the surface of the mounting pipe 101 .

[0034] The fan blade 107 is located inside the air outlet pipe 204 , and the surface of the sealing gasket 103 contacts the inner wall of the air outlet pipe 204 .

[0035] The connecting mechanism 3 includes a heat exchanger 301, the right end of the heat exchanger 301 is connected to the left end of the exhaust pipe 203, and the left end of the heat exchanger 301 is connected to a connecting pipe 302. The exhaust gas enters the interior of the heat exchanger 301 through the connecting pipe 302, and the temperature of the exhaust gas is reduced through the heat exchanger 301.

[0036] The implementation principle of the reliability detection device of an engine exhaust gas recirculation valve in the embodiment of the present application is as follows: when in use, the exhaust gas enters the interior of the heat exchanger 301 through the connecting pipe 302, the temperature of the exhaust gas is reduced by the heat exchanger 301, and the exhaust gas is transported to the interior of the exhaust pipe 203, and the exhaust gas enters the interior of the mounting plate 202 by opening the circulation valve 201, and flows to the interior of the outlet pipe 204. When there is gas flowing in the interior of the outlet pipe 204, the fan blade 107 is driven to rotate, so that the rotating shaft 106 rotates, thereby driving the photoelectric encoder 108 to rotate, and the photoelectric encoder 108 detects the exhaust gas through the radio and television effect. The number of rotations of the rotating shaft within a certain period of time is measured to determine the flow rate of the gas in the outlet pipe, thereby realizing the detection of the circulation valve 201. When the number of rotations of the rotating shaft 106 decreases or stops rotating, it is possible to determine whether the circulation valve 201 is damaged, thereby improving the convenience of use. When the photoelectric encoder 108 is damaged, the mounting tube 101 is removed from the inner wall of the outlet pipe 204 by rotating the mounting tube 101, and the photoelectric encoder 108 is replaced, which facilitates the replacement of the photoelectric encoder 108. During installation, the connection between the mounting tube 101 and the outlet pipe 204 is sealed by the sealing gasket 103 to reduce gas leakage.

[0037] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A reliability detection device for an engine exhaust gas recirculation valve, characterized in that: It comprises a detection mechanism (1), a main body mechanism (2) and a connection mechanism (3), wherein the detection mechanism (1) is located inside the main body mechanism (2), and the connection mechanism (3) is located at the left end of the main body mechanism (2); The detection mechanism (1) comprises a mounting tube (101), a fixed block (102) is fixedly connected to the surface of the mounting tube (101), a sealing gasket (103) is arranged at the upper end of the fixed block (102), a protruding block (104) is fixedly connected to the inner wall of the mounting tube (101), a fixed rod (105) is fixedly connected to the top of the protruding block (104), a rotating shaft (106) is rotatably connected to the top of the fixed rod (105), a fan blade (107) is fixedly connected to the surface of the rotating shaft (106), and a photoelectric encoder (108) is fixedly connected to the top of the rotating shaft (106).

2. The reliability detection device for an engine exhaust gas recirculation valve according to claim 1, characterized in that: The surface of the mounting tube (101) is provided with threads, the sealing gasket (103) is sleeved on the surface of the mounting tube (101), the number of the fan blades (107) is five, and the five fan blades (107) are symmetrically distributed with the rotating shaft (106) as the center.

3. The reliability detection device for an engine exhaust gas recirculation valve according to claim 1, characterized in that: The main body mechanism (2) comprises a circulation valve (201), the bottom of the circulation valve (201) is connected to a mounting plate (202), the bottom of the mounting plate (202) is connected to an exhaust pipe (203), and the right end of the exhaust pipe (203) is provided with an exhaust pipe (204).

4. The reliability detection device for an engine exhaust gas recirculation valve according to claim 3, characterized in that: The interior of the mounting plate (202) is a hollow structure, the top of the air outlet pipe (204) is in communication with the mounting plate (202), and the inner wall of the air outlet pipe (204) is threadedly connected to the surface of the mounting pipe (101).

5. The reliability detection device for an engine exhaust gas recirculation valve according to claim 1, characterized in that: The fan blade (107) is located inside the air outlet pipe (204), and the surface of the sealing gasket (103) is in contact with the inner wall of the air outlet pipe (204).

6. The reliability detection device for an engine exhaust gas recirculation valve according to claim 1, characterized in that: The connection mechanism (3) comprises a heat exchanger (301), the right end of the heat exchanger (301) is connected to the left end of the exhaust pipe (203), and the left end of the heat exchanger (301) is connected to a connection pipe (302).

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