Engine exhaust one-way valve plate strength detection device

Abstract

The invention discloses an engine exhaust one-way valve plate strength detection device which comprises a detection frame, a valve plate and a valve plate spring, an upper transverse plate and a lower transverse plate are arranged in the middle of the detection frame, the upper end of the lower transverse plate is movably connected with a bearing frame used for installing the valve plate, and a plurality of punching rods used for punching the valve plate are arranged on a lifting frame. The distance between the punching rod and the valve plate is adjusted through an adjusting mechanism, the valve plate spring is located between the bearing frame and the lower transverse plate, a counter used for monitoring the punching frequency of the punching rod is arranged at the upper end of the upper transverse plate, and a distance measuring sensor used for monitoring the shape change of the valve plate in real time is arranged at the upper end of the lower transverse plate. The impact mechanism drives the punching rods to impact the valve plates in a reciprocating mode, the valve plate springs are arranged, the real situation of the valve plates in the working process can be simulated more accurately, the different distances between the punching rods and the valve plates can be adjusted through the adjusting mechanism, and transverse comparison of the valve plates of the same type can be facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of one-way valve detection, and in particular to a valve plate strength detection device for an engine exhaust one-way valve. Background Art

[0002] The valve plate of the engine exhaust check valve is the core functional element of the component. Its main function is to control the exhaust flow direction (allowing exhaust gas to be discharged in one direction and preventing backflow), and to withstand complex working conditions such as exhaust pressure, temperature, and airflow impact during engine operation. It is common for a circular thin plate to pass through, and a spring or elastic support is fixed in the valve body. The valve plate is kept closed by the spring force, and opens when the exhaust pressure overcomes the spring force. Although the valve plate of the engine exhaust check valve is small, it directly affects the power, economy, and emission performance of the engine. The selection of its materials and structural design are particularly important. Therefore, the strength test of the valve plate of the engine exhaust check valve is an important link to ensure its normal operation during work and prevent engine performance degradation or failure due to valve plate failure.

[0003] A Chinese invention patent with announcement number CN119198056A discloses a valve plate fatigue test device, including a punch assembly and a drive assembly, wherein the punch assemblies are distributed in a circle, a valve plate is installed on the outside of the punch assembly, and the drive assembly is arranged on the inside of the punch assembly, and the drive assembly drives the punch assembly to intermittently extend and retract to impact the valve plate to simulate the closure of the valve plate, and the drive assembly is also connected to an adjustment assembly to adjust the impact strength of the drive assembly; by setting the drive assembly, the punch assembly is driven to intermittently and repeatedly impact the valve plate to drive the valve plate to repeatedly open, simulating the exhaust process under the use condition of the valve plate, so as to make the valve plate test result more accurate; in addition, the drive assembly can be adjusted through the adjustment assembly, so as to change the different loading strengths of the drive assembly on the punch assembly, so that the test device meets different loading strength requirements. With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: when testing the valve plate, it is necessary to test the valve plate with different materials and different impact strengths. In this scheme, the impact strength of each punch on the valve plate is the same. Multiple tests are required when testing different impact strengths, which is rather troublesome. Even if the impact strength of the driving component can be adjusted by the adjustment component, the impact strength of the punch is the same when the valve plate is tested at the same time. Moreover, when the adjustment component adjusts the impact strength of the driving component, it is difficult to adjust accurately without a specific adjustment scale. Moreover, the deformation condition of the valve plate cannot be monitored in real time during the valve plate detection process, which will affect the judgment of the detection results. In addition, the valve plate is used in conjunction with the valve plate spring. If the valve plate is fixed and directly impacted, this is inconsistent with the actual working condition of the valve plate. Therefore, there will be a large error between the detection result and the actual situation. Summary of the invention

[0004] The purpose of the present invention is to provide a device for detecting the strength of the valve disc of an engine exhaust check valve, so as to solve the problems put forward in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: A device for detecting the strength of the valve disc of an engine exhaust check valve, including a detection frame, a valve disc and a valve disc spring. When the check valve works, the valve disc is reset by the valve disc spring. There are two layers of cross plates in the middle of the detection frame, including an upper cross plate and a lower cross plate, and the upper cross plate is located above the lower cross plate;

[0006] The upper end of the lower cross plate is movably connected with a carrier for installing the valve disc, and the valve disc is fixed inside the upper end of the carrier through a limiting mechanism;

[0007] The upper end of the upper cross plate is movably connected with a lifting frame, and the lifting frame is controlled to reciprocate up and down through an impact mechanism;

[0008] There are multiple punch rods on the lifting frame for punching the valve disc, and the distance between the punch rods and the valve disc is adjusted through an adjustment mechanism to adjust the impact strength on the valve disc;

[0009] The valve disc spring is located between the carrier and the lower cross plate and is used to reset the carrier and the valve disc. The valve disc spring is limited through a limiting component, and the tightness of the valve disc spring is adjusted;

[0010] A counter for monitoring the punching times of the punch rods is provided at the upper end of the upper cross plate;

[0011] A ranging sensor for real-time monitoring of the shape change of the valve disc is provided at the upper end of the lower cross plate.

[0012] Preferably, the adjustment mechanism includes a fixed plate on one side of the upper cross plate. A gear is rotatably installed on the fixed plate, and the gear is controlled to rotate through a first knob. A circular rack is provided at the upper end of the punch rod, and the circular rack is meshed and connected with the gear;

[0013] A circular adjustment scale is provided on the front of the fixed plate, and a triangular indicating block matching the adjustment scale is provided on the end face of the first knob;

[0014] Among them, the punch rod is controlled to lift by rotating the first knob, and the specific lifting distance of the punch rod can be adjusted according to the adjustment scale;

[0015] The calculation formula for the lifting distance L of the punch rod is: ;

[0016] Among them, m is the module of the gear, z is the number of teeth of the gear, is the rotation angle of the first knob, Both m and z are known numbers. Set L as a constant. Therefore, according to the formula, The obtained numbers are engraved on the front of the fixed plate, thus forming the adjustment scale.

[0017] Preferably, the carrier frame includes a bottom plate, and a plurality of first guide rods are provided at the bottom of the bottom plate. The first guide rods are slidably connected to the lower cross plate up and down, and a limit block for limiting the carrier frame is provided at the lower end of the first guide rods;

[0018] A carrier cylinder is provided at the upper end of the bottom plate. A placement table is provided inside the carrier cylinder, and the middle part of the placement table is a hollow structure. The valve plate is located at the upper end of the placement table.

[0019] Preferably, the limiting mechanism includes a plurality of limiting rods radially installed around the carrier cylinder. The limiting rods are slidably connected to the carrier cylinder. A limiting plate for limiting the valve plate is provided at one end of the limiting rod. An annular groove is provided between the carrier cylinder and the placement table. The limiting plate is located in the annular groove;

[0020] A hemispherical head is provided at the other end of the limiting rod. The outer diameter of the bottom plate is threadedly connected with a rotating ring. A plurality of guide blocks equal in number to the hemispherical heads are provided at the upper end of the rotating ring. An inclined surface matching the hemispherical head is provided inside the guide block;

[0021] Wherein, when the rotating ring rotates, the guide block squeezes the hemispherical head to move through the inclined surface, so that the limiting plate limits the valve plate. A return spring for resetting the limiting plate is sleeved outside the limiting rod.

[0022] Preferably, the limiting plate includes a side pressure plate for limiting the outer diameter of the valve plate and an upper pressure plate for limiting the upper end of the valve plate. The upper pressure plate is located above the side pressure plate.

[0023] Preferably, the limiting component includes a through hole penetrating the lower cross plate. A threaded pipe is provided at the bottom of the through hole. A threaded block is threadedly connected to the inner diameter of the threaded pipe. A knob two for driving the threaded block to rotate is provided at the bottom of the threaded block;

[0024] A limiting ring is provided at the bottom of the bottom plate. The two ends of the valve plate spring are respectively located inside the limiting ring and the threaded pipe.

[0025] Preferably, the impact mechanism includes a vertical frame fixed in the middle of the upper end of the upper cross plate. A crankshaft is rotatably installed inside the vertical frame near the upper end. The crankshaft is driven to rotate by a motor;

[0026] A connecting plate is provided in the middle of the upper end of the lifting frame. The connecting plate is movably connected to the crankshaft through a connecting rod. The two ends of the connecting rod are respectively rotatably connected to the connecting plate and the crankshaft.

[0027] Preferably, guide columns two are provided near both ends of the bottom of the lifting frame. The guide columns two are slidably connected to the upper cross plate up and down.

[0028] Preferably, the ranging end of the ranging sensor corresponds to the bottom of the base plate.

[0029] Preferably, a notch is provided on the front side of the upper horizontal plate near the position of the supporting frame for easy operation.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The present invention limits the outer diameter and the upper end of the valve plate by a limiting mechanism, and the valve plate can be limited and released by rotating the rotating ring, which can facilitate the installation and removal of the valve plate;

[0032] When testing the valve plate, the actual working condition of the valve plate can be simulated more accurately by adding a valve plate spring. The impact mechanism drives the punch rod to impact the valve plate reciprocatingly. After the valve plate is impacted, the valve plate spring causes the support frame and the valve plate to drop a certain distance. This is the action of the valve plate during exhaust, which further simulates the actual working state of the valve plate inside the one-way valve.

[0033] The adjustment mechanism can adjust the distance between each punch rod and the valve plate to different values, so the impact strength of each punch rod on the valve plate is different. Therefore, valve plates of the same model can be compared horizontally, and the specific distance of the punch rod lifting can be adjusted according to the adjustment scale, which is convenient for the staff to operate;

[0034] The shape change of the valve plate can be monitored in real time by the distance measuring sensor, and the impact times of the punch rod can be monitored by the counter. Therefore, multiple groups of detection data can be obtained when the valve plate is detected, which is convenient for the staff to perform data analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0036] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0037] Figure 3 It is a front view of the present invention;

[0038] Figure 4 It is a front cross-sectional view of the present invention;

[0039] Figure 5 It is a schematic diagram of the carrier and the limiting mechanism of the present invention;

[0040] Figure 6 For the present invention Figure 5 Sectional view.

[0041] In the figure: 1, detection frame; 11, upper horizontal plate; 12, lower horizontal plate; 13, clearance gap; 2, valve plate; 21, valve plate spring; 3, bearing frame; 31, bottom plate; 32, guide rod 1; 33, limit block; 34, bearing cylinder; 35, placement table; 4, limit mechanism; 41, limit rod; 42, limit plate; 421, side pressure plate; 422, upper pressure plate; 43, annular groove; 44, reset spring; 45, hemispherical head; 46, swivel; 47, guide block; 48, inclined surface ; 5. Lifting frame; 51. Guide column 2; 6. Impact mechanism; 61. Stand; 62. Crankshaft; 63. Motor; 64. Connecting plate; 65. Connecting rod; 7. Punch rod; 8. Adjusting mechanism; 81. Fixing plate; 82. Gear; 83. Circular rack; 84. Knob 1; 85. Adjusting scale; 86. Triangular indicator block; 9. Limiting assembly; 91. Threaded tube; 92. Threaded block; 93. Knob 2; 94. Limiting ring; 10. Counter; 101. Distance sensor. DETAILED DESCRIPTION

[0042] 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.

[0043] See also Figures 1-6 The present invention provides a technical solution: a valve plate strength detection device for an engine exhaust one-way valve, comprising a detection frame 1, a valve plate 2 and a valve plate spring 21. When the one-way valve is working, the valve plate 2 is reset by the valve plate spring 21. Two layers of horizontal plates are arranged in the middle of the detection frame 1, including an upper horizontal plate 11 and a lower horizontal plate 12. The upper horizontal plate 11 is located above the lower horizontal plate 12. The front of the upper horizontal plate 11 is close to the bearing frame 3 and is provided with a clearance notch 13 for easy operation.

[0044] The upper end of the lower horizontal plate 12 is movably connected with a support frame 3 for mounting the valve plate 2, and the valve plate 2 is fixed to the inner side of the upper end of the support frame 3 through a limiting mechanism 4;

[0045] The carrier 3 includes a bottom plate 31, a plurality of guide rods 32 are provided at the bottom of the bottom plate 31, the guide rods 32 are slidably connected to the lower cross plate 12, and a limit block 33 for limiting the position of the carrier 3 is provided at the lower end of the guide rods 32. A bearing tube 34 is provided at the upper end of the bottom plate 31, and a placing platform 35 is provided inside the bearing tube 34. The middle part of the placing platform 35 is a hollow structure, and the valve plate 2 is located at the upper end of the placing platform 35.

[0046] The limiting mechanism 4 includes a plurality of limiting rods 41 radially installed around the bearing cylinder 34, and the limiting rods 41 are slidably connected to the bearing cylinder 34. One end of the limiting rod 41 is provided with a limiting plate 42 for limiting the valve plate 2. The limiting plate 42 includes a side pressing plate 421 for limiting the outer diameter of the valve plate 2 and an upper pressing plate 422 for limiting the upper end of the valve plate 2. The upper pressing plate 422 is located above the side pressing plate 421. An annular groove 43 is provided between the bearing cylinder 34 and the placing table 35. The limiting plate 42 is located in the annular groove 43. The other end of the limiting rod 41 is provided with a hemispherical head 45. The outer diameter of the bottom plate 31 is threadedly connected with a rotating ring 46. The upper end of the rotating ring 46 is provided with guide blocks 47 having the same number as the hemispherical heads 45. The inner side of the guide block 47 is provided with an inclined surface 48 matching the hemispherical head 45;

[0047] When the rotating ring 46 rotates, the guide block 47 squeezes the hemispherical head 45 to move through the inclined surface 48, so that the limiting plate 42 limits the valve plate 2. A return spring 44 for resetting the limiting plate 42 is sleeved outside the limiting rod 41.

[0048] Among them, when detecting the valve plate 2, the valve plate 2 needs to be fixed on the bearing frame 3. First, place the valve plate 2 on the upper end of the placing table 35 inside the bearing cylinder 34, and then limit the valve plate 2 through the limiting mechanism 4. After the valve plate 2 is placed on the upper end of the placing table 35, rotate the rotating ring 46 by hand, so that the guide block 47 at the upper end of the rotating ring 46 rotates accordingly, so that the inclined surface 48 on one side of the guide block 47 squeezes the hemispherical head 45, so that the limiting rod 41 and the limiting plate 42 approach the valve plate 2, so that the side pressing plate 421 limits the outer diameter of the valve plate 2, and the upper pressing plate 422 limits the upper end of the valve plate 2. At this time, the return spring 44 is compressed. When the detection is completed, rotate the rotating ring 46 in the reverse direction so that the guide block 47 gradually leaves the hemispherical head 45, and the limiting plate 42 leaves the valve plate 2 through the rebounding force of the return spring 44, so that the valve plate 2 can be taken out.

[0049] The valve plate spring 21 is located between the bearing frame 3 and the lower cross plate 12, and is used for resetting the bearing frame 3 and the valve plate 2. The valve plate spring 21 is limited by a limiting component 9 and the tightness of the valve plate spring 21 is adjusted;

[0050] The limiting component 9 includes a through hole penetrating the lower cross plate 12. A threaded pipe 91 is provided at the bottom of the through hole. The inner diameter of the threaded pipe 91 is threadedly connected with a threaded block 92. The bottom of the threaded block 92 is provided with a knob two 93 for driving the threaded block 92 to rotate. A limiting ring 94 is provided at the bottom of the bottom plate 31. Both ends of the valve plate spring 21 are respectively located inside the limiting ring 94 and the threaded pipe 91.

[0051] Among them, the valve plate 2 is used in cooperation with the valve plate spring 21. The valve plate 2 is kept closed by the elastic force of the valve plate spring 21 and opens when the exhaust pressure overcomes the elastic force of the valve plate spring 21. Therefore, adding the valve plate spring 21 during the detection of the valve plate 2 can more accurately simulate the real situation when the valve plate 2 is working. When installing the valve plate spring 21, first rotate the knob two 93 to take out the threaded block 92, then put the valve plate spring 21 into the internal part of the threaded tube 91 through the bottom of the threaded tube 91, and then rotate the knob two 93 to install the threaded block 92 at the bottom of the threaded tube 91. Continue to rotate the knob two 93 to make the threaded block 92 rise until the valve plate spring 21 is inside the limit ring 94 and the upper end of the valve plate spring 21 abuts against the bottom of the bottom plate 31. By adjusting the height of the threaded block 92 inside the threaded tube 91, the compression strength of the valve plate spring 21 can be adjusted so that the compression strength of the valve plate spring 21 inside the one-way valve is the same.

[0052] The upper end of the upper cross plate 11 is movably connected with a lifting frame 5. The lifting frame 5 is provided with a plurality of punching rods 7 for punching the valve plate 2. The lifting frame 5 is controlled by an impact mechanism 6 to perform reciprocating lifting and lowering.

[0053] The impact mechanism 6 includes a vertical frame 61 fixed in the middle of the upper end of the upper cross plate 11. A crankshaft 62 is rotatably installed near the inner side of the upper end of the vertical frame 61. The crankshaft 62 is driven to rotate by a motor 63. A connecting plate 64 is provided in the middle of the upper end of the lifting frame 5. The connecting plate 64 is movably connected with the crankshaft 62 through a connecting rod 65, and both ends of the connecting rod 65 are respectively rotatably connected with the connecting plate 64 and the crankshaft 62. Guide posts two 51 are provided near both ends of the bottom of the lifting frame 5. The guide posts two 51 are slidably connected with the upper cross plate 11 up and down.

[0054] Among them, after the valve plate 2 and the valve plate spring 21 are installed, the impact mechanism 6 drives the punching rod 7 to reciprocally impact the valve plate 2 to simulate the actual working state of the valve plate 2. The motor 63 drives the crankshaft 62 to rotate. The crankshaft 62 and the connecting plate 64 at the upper end of the lifting frame 5 are connected through the connecting rod 65, so that the lifting frame 5 can reciprocally lift and lower, and the punching rod 7 installed on the lifting frame 5 impacts the valve plate 2. After the valve plate 2 is impacted, the carrier 3 and the valve plate 2 are lowered by a certain distance through the valve plate spring 21. This is the action of the valve plate 2 during exhaust, further simulating the actual working state of the valve plate 2 inside the one-way valve. After the punching rod 7 finishes the impact, the carrier 3 and the valve plate 2 are reset by the valve plate spring 21 and wait for the next impact of the punching rod 7.

[0055] The punching rod 7 is adjusted through an adjusting mechanism 8 to adjust the distance between the punching rod 7 and the valve plate 2 to adjust the impact strength on the valve plate 2.

[0056] The adjusting mechanism 8 includes a fixing plate 81 located on one side of the upper cross plate 11. A gear 82 is rotatably installed on the fixing plate 81. The gear 82 is controlled to rotate by a first knob 84. A circular rack 83 is provided at the upper end of the punching rod 7. The circular rack 83 is meshed and connected with the gear 82. A circular adjusting scale 85 is provided on the front surface of the fixing plate 81. A triangular indicating block 86 matching the adjusting scale 85 is provided on the end surface of the first knob 84.

[0057] The punching rod 7 is controlled to move up and down by rotating the first knob 84, and the specific distance of the punching rod 7 moving up and down can be adjusted according to the adjusting scale 85.

[0058] The calculation formula for the lifting distance L of the punching rod 7 is ;

[0059] m is the module of the gear 82, z is the number of teeth of the gear 82, is the rotation angle of the first knob 84, Both, m and z are known numbers. Setting L as a constant, thus the number of can be calculated according to the formula. The obtained number is engraved on the front surface of the fixing plate 81, namely, the adjusting scale 85 is formed.

[0060] Among them, different distances between each punching rod 7 and the valve plate 2 can be adjusted through the adjusting mechanism 8. Therefore, the impact strength of each punching rod 7 on the valve plate 2 is different. Thus, the valve plates 2 of the same model can be compared horizontally. By rotating the first knob 84, the gear 82 rotates. Through the circular rack 83 meshed and connected with the gear 82, the punching rod 7 can move up or down. Therefore, the impact strength of the punching rod 7 can be adjusted, and the specific distance of the punching rod 7 moving up and down can be adjusted according to the adjusting scale 85, which is convenient for the staff to operate.

[0061] A counter 10 for monitoring the punching times of the punching rod 7 is provided at the upper end of the upper cross plate 11. A distance measuring sensor 101 for real-time monitoring of the shape change of the valve plate 2 is provided at the upper end of the lower cross plate 12. The distance measuring end of the distance measuring sensor 101 corresponds to the bottom of the bottom plate 31.

[0062] Among them, the impact rod 7 impacts the valve plate 2 once, and the ranging sensor 101 measures the distance to the bottom plate 31 once. After the impact rod 7 impacts the valve plate 2 multiple times, the middle part of the valve plate 2 will be deformed, causing the valve plate 2 to bulge downward. Since the distance that the impact rod 7 descends remains unchanged, as the bulge of the valve plate 2 continuously increases, the distance that the valve plate 2 descends will gradually decrease, causing the distance that the bottom plate 31 descends to gradually decrease. The ranging sensor 101 can monitor the descending distance of the bottom plate 31 in real time, so the shape change of the valve plate 2 can be monitored in real time. In addition, the counter 10 can monitor the number of times the lifting frame 5 moves up and down, so the number of impacts of the impact rod 7 can be monitored. Therefore, multiple sets of detection data can be obtained when detecting the valve plate 2, which is convenient for the staff to perform data analysis.

[0063] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An engine exhaust check valve vane strength detection device, comprising a detection frame (1), a vane (2) and a vane spring (21). When the check valve works, the vane (2) is reset by the vane spring (21), and it is characterized in that: In the middle of the detection frame (1), there are two layers of cross plates, including an upper cross plate (11) and a lower cross plate (12), and the upper cross plate (11) is located above the lower cross plate (12); At the upper end of the lower cross plate (12), a carrier frame (3) for installing the valve plate (2) is movably connected, and the valve plate (2) is fixed to the inner side of the upper end of the carrier frame (3) through a limiting mechanism (4); At the upper end of the upper cross plate (11), a lifting frame (5) is movably connected, and the lifting frame (5) is controlled to reciprocate up and down through an impact mechanism (6); On the lifting frame (5), there are multiple punching rods (7) for punching the valve plate (2), and the distance between the punching rods (7) and the valve plate (2) is adjusted through an adjusting mechanism (8) to adjust the impact strength on the valve plate (2); The valve plate spring (21) is located between the carrier frame (3) and the lower cross plate (12) and is used to reset the carrier frame (3) and the valve plate (2). The valve plate spring (21) is limited through a limiting component (9), and the tightness of the valve plate spring (21) is adjusted; At the upper end of the upper cross plate (11), a counter (10) for monitoring the punching times of the punching rod (7) is provided; At the upper end of the lower cross plate (12), a ranging sensor (101) for real-time monitoring of the shape change of the valve plate (2) is provided.

2. The strength detection device for the valve disc of an engine exhaust check valve according to claim 1, characterized in that: The adjusting mechanism (8) includes a fixing plate (81) on one side of the upper cross plate (11). A gear (82) is rotatably installed on the fixing plate (81), and the gear (82) is controlled to rotate through a first knob (84). A circular rack (83) is provided at the upper end of the punching rod (7), and the circular rack (83) is meshed with the gear (82); On the front surface of the fixing plate (81), a circular adjusting scale (85) is provided, and a triangular indicating block (86) matching the adjusting scale (85) is provided on the end surface of the first knob (84); Among them, the punching rod (7) is controlled to move up and down by rotating the first knob (84), and the specific distance of the punching rod (7) moving up and down can be adjusted according to the adjusting scale (85); The calculation formula for the lifting distance L of the impact rod (7) is ; where m is the module of the gear (82), z is the number of teeth of the gear (82), is the rotation angle of the first knob (84), Both m and z are known numbers. Set L as a constant. Therefore, according to the formula, the number can be calculated. The obtained number is engraved on the front of the fixed plate (81), thus forming the adjustment scale (85).

3. The strength detection device for the valve disc of an engine exhaust check valve according to claim 1, characterized in that: The carrier frame (3) includes a bottom plate (31). A plurality of first guide rods (32) are provided at the bottom of the bottom plate (31), and the first guide rods (32) are slidably connected up and down with the lower cross plate (12). A limiting block (33) for limiting the carrier frame (3) is provided at the lower end of the first guide rods (32); At the upper end of the bottom plate (31), a carrier cylinder (34) is provided. A placement table (35) is provided inside the carrier cylinder (34), and the middle of the placement table (35) is a hollow structure. The valve plate (2) is located at the upper end of the placement table (35).

4. The strength detection device for the engine exhaust check valve disc according to claim 3, characterized in that: The limiting mechanism (4) includes a plurality of limiting rods (41) radially installed around the carrier cylinder (34), and the limiting rods (41) are slidably connected with the carrier cylinder (34). A limiting plate (42) for limiting the valve plate (2) is provided at one end of the limiting rod (41). An annular groove (43) is provided between the carrier cylinder (34) and the placement table (35), and the limiting plate (42) is located in the annular groove (43); The other end of the limit rod (41) is provided with a hemispherical head (45); the outer diameter of the bottom plate (31) is connected to a swivel (46) via a thread; the upper end of the swivel (46) is provided with guide blocks (47) of the same number as the hemispherical heads (45); the inner side of the guide blocks (47) is provided with an inclined surface (48) matching the hemispherical heads (45); When the rotating ring (46) rotates, the guide block (47) presses the hemispherical head (45) to move via the inclined surface (48), so that the limit plate (42) limits the valve plate (2), and a return spring (44) for returning the limit plate (42) is sleeved on the outside of the limit rod (41).

5. An engine exhaust check valve vane strength detection device according to claim 4, characterized in that: The limiting plate (42) comprises a side pressure plate (421) for limiting the outer diameter of the valve plate (2) and an upper pressure plate (422) for limiting the upper end of the valve plate (2). The upper pressure plate (422) is located at the upper end of the side pressure plate (421).

6. The strength detection device for a valve disc of an engine exhaust check valve according to claim 3, wherein: The limit assembly (9) comprises a through hole penetrating the lower horizontal plate (12), a threaded tube (91) is provided at the bottom of the through hole, a threaded block (92) is connected to the inner diameter of the threaded tube (91) via a thread, and a second knob (93) for driving the threaded block (92) to rotate is provided at the bottom of the threaded block (92); A limiting ring (94) is provided at the bottom of the bottom plate (31), and two ends of the valve plate spring (21) are respectively located inside the limiting ring (94) and the threaded tube (91).

7. The strength detection device for the valve disc of an engine exhaust check valve according to claim 1, characterized in that: The impact mechanism (6) comprises a stand (61) fixed to the middle of the upper end of the upper horizontal plate (11), a crankshaft (62) being rotatably mounted on the inner side of the upper end of the stand (61), and the crankshaft (62) is driven to rotate by a motor (63); A connecting plate (64) is provided in the middle of the upper end of the lifting frame (5); the connecting plate (64) is movably connected to the crankshaft (62) via a connecting rod (65); and the two ends of the connecting rod (65) are rotatably connected to the connecting plate (64) and the crankshaft (62) respectively.

8. An engine exhaust check valve vane strength detection device according to claim 1, characterized in that: A second guide post (51) is provided near both ends of the bottom of the lifting frame (5), and the second guide post (51) is slidably connected to the upper horizontal plate (11) up and down.

9. The strength detection device for the valve disc of an engine exhaust check valve according to claim 1, characterized in that: The distance measuring end of the distance measuring sensor (101) corresponds to the bottom of the bottom plate (31).

10. The strength detection device for the engine exhaust check valve disc according to claim 1, wherein: The upper horizontal plate (11) is provided with a clearance notch (13) on the front side near the support frame (3) for easy operation.

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